Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
0b302171 | 3 | Copyright (C) 1994-2012 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 KS |
55 | #include "typeprint.h" |
56 | #include "jv-lang.h" | |
ccefe4c4 | 57 | #include "psympriv.h" |
9291a0cd TT |
58 | #include "exceptions.h" |
59 | #include "gdb_stat.h" | |
96d19272 | 60 | #include "completer.h" |
34eaf542 | 61 | #include "vec.h" |
98bfdba5 | 62 | #include "c-lang.h" |
a766d390 | 63 | #include "go-lang.h" |
98bfdba5 | 64 | #include "valprint.h" |
3019eac3 | 65 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 66 | #include "gdb/gdb-index.h" |
60d5a603 | 67 | #include <ctype.h> |
cbb099e8 | 68 | #include "gdb_bfd.h" |
4357ac6c | 69 | #include "f-lang.h" |
4c2df51b | 70 | |
c906108c SS |
71 | #include <fcntl.h> |
72 | #include "gdb_string.h" | |
4bdf3d34 | 73 | #include "gdb_assert.h" |
c906108c | 74 | #include <sys/types.h> |
d8151005 | 75 | |
34eaf542 TT |
76 | typedef struct symbol *symbolp; |
77 | DEF_VEC_P (symbolp); | |
78 | ||
45cfd468 DE |
79 | /* When non-zero, print basic high level tracing messages. |
80 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ | |
81 | static int dwarf2_read_debug = 0; | |
82 | ||
d97bc12b | 83 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 84 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 85 | |
900e11f9 JK |
86 | /* When non-zero, cross-check physname against demangler. */ |
87 | static int check_physname = 0; | |
88 | ||
481860b3 | 89 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 90 | static int use_deprecated_index_sections = 0; |
481860b3 | 91 | |
df8a16a1 DJ |
92 | /* When set, the file that we're processing is known to have debugging |
93 | info for C++ namespaces. GCC 3.3.x did not produce this information, | |
94 | but later versions do. */ | |
95 | ||
96 | static int processing_has_namespace_info; | |
97 | ||
6502dd73 DJ |
98 | static const struct objfile_data *dwarf2_objfile_data_key; |
99 | ||
dce234bc PP |
100 | struct dwarf2_section_info |
101 | { | |
102 | asection *asection; | |
103 | gdb_byte *buffer; | |
104 | bfd_size_type size; | |
be391dca TT |
105 | /* True if we have tried to read this section. */ |
106 | int readin; | |
dce234bc PP |
107 | }; |
108 | ||
8b70b953 TT |
109 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
110 | DEF_VEC_O (dwarf2_section_info_def); | |
111 | ||
9291a0cd TT |
112 | /* All offsets in the index are of this type. It must be |
113 | architecture-independent. */ | |
114 | typedef uint32_t offset_type; | |
115 | ||
116 | DEF_VEC_I (offset_type); | |
117 | ||
156942c7 DE |
118 | /* Ensure only legit values are used. */ |
119 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
120 | do { \ | |
121 | gdb_assert ((unsigned int) (value) <= 1); \ | |
122 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
123 | } while (0) | |
124 | ||
125 | /* Ensure only legit values are used. */ | |
126 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
127 | do { \ | |
128 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
129 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
130 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
131 | } while (0) | |
132 | ||
133 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
134 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
135 | do { \ | |
136 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
137 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
138 | } while (0) | |
139 | ||
9291a0cd TT |
140 | /* A description of the mapped index. The file format is described in |
141 | a comment by the code that writes the index. */ | |
142 | struct mapped_index | |
143 | { | |
559a7a62 JK |
144 | /* Index data format version. */ |
145 | int version; | |
146 | ||
9291a0cd TT |
147 | /* The total length of the buffer. */ |
148 | off_t total_size; | |
b11b1f88 | 149 | |
9291a0cd TT |
150 | /* A pointer to the address table data. */ |
151 | const gdb_byte *address_table; | |
b11b1f88 | 152 | |
9291a0cd TT |
153 | /* Size of the address table data in bytes. */ |
154 | offset_type address_table_size; | |
b11b1f88 | 155 | |
3876f04e DE |
156 | /* The symbol table, implemented as a hash table. */ |
157 | const offset_type *symbol_table; | |
b11b1f88 | 158 | |
9291a0cd | 159 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 160 | offset_type symbol_table_slots; |
b11b1f88 | 161 | |
9291a0cd TT |
162 | /* A pointer to the constant pool. */ |
163 | const char *constant_pool; | |
164 | }; | |
165 | ||
95554aad TT |
166 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
167 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
168 | ||
9cdd5dbd DE |
169 | /* Collection of data recorded per objfile. |
170 | This hangs off of dwarf2_objfile_data_key. */ | |
171 | ||
6502dd73 DJ |
172 | struct dwarf2_per_objfile |
173 | { | |
dce234bc PP |
174 | struct dwarf2_section_info info; |
175 | struct dwarf2_section_info abbrev; | |
176 | struct dwarf2_section_info line; | |
dce234bc PP |
177 | struct dwarf2_section_info loc; |
178 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 179 | struct dwarf2_section_info macro; |
dce234bc PP |
180 | struct dwarf2_section_info str; |
181 | struct dwarf2_section_info ranges; | |
3019eac3 | 182 | struct dwarf2_section_info addr; |
dce234bc PP |
183 | struct dwarf2_section_info frame; |
184 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 185 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 186 | |
8b70b953 TT |
187 | VEC (dwarf2_section_info_def) *types; |
188 | ||
be391dca TT |
189 | /* Back link. */ |
190 | struct objfile *objfile; | |
191 | ||
d467dd73 | 192 | /* Table of all the compilation units. This is used to locate |
10b3939b | 193 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
194 | struct dwarf2_per_cu_data **all_comp_units; |
195 | ||
196 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
197 | int n_comp_units; | |
198 | ||
1fd400ff | 199 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 200 | int n_type_units; |
1fd400ff | 201 | |
d467dd73 | 202 | /* The .debug_types-related CUs (TUs). */ |
b4dd5633 | 203 | struct signatured_type **all_type_units; |
1fd400ff | 204 | |
f4dc4d17 DE |
205 | /* The number of entries in all_type_unit_groups. */ |
206 | int n_type_unit_groups; | |
207 | ||
208 | /* Table of type unit groups. | |
209 | This exists to make it easy to iterate over all CUs and TU groups. */ | |
210 | struct type_unit_group **all_type_unit_groups; | |
211 | ||
212 | /* Table of struct type_unit_group objects. | |
213 | The hash key is the DW_AT_stmt_list value. */ | |
214 | htab_t type_unit_groups; | |
72dca2f5 | 215 | |
348e048f DE |
216 | /* A table mapping .debug_types signatures to its signatured_type entry. |
217 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
218 | htab_t signatured_types; | |
219 | ||
f4dc4d17 DE |
220 | /* Type unit statistics, to see how well the scaling improvements |
221 | are doing. */ | |
222 | struct tu_stats | |
223 | { | |
224 | int nr_uniq_abbrev_tables; | |
225 | int nr_symtabs; | |
226 | int nr_symtab_sharers; | |
227 | int nr_stmt_less_type_units; | |
228 | } tu_stats; | |
229 | ||
230 | /* A chain of compilation units that are currently read in, so that | |
231 | they can be freed later. */ | |
232 | struct dwarf2_per_cu_data *read_in_chain; | |
233 | ||
3019eac3 DE |
234 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
235 | This is NULL if the table hasn't been allocated yet. */ | |
236 | htab_t dwo_files; | |
237 | ||
80626a55 DE |
238 | /* Non-zero if we've check for whether there is a DWP file. */ |
239 | int dwp_checked; | |
240 | ||
241 | /* The DWP file if there is one, or NULL. */ | |
242 | struct dwp_file *dwp_file; | |
243 | ||
36586728 TT |
244 | /* The shared '.dwz' file, if one exists. This is used when the |
245 | original data was compressed using 'dwz -m'. */ | |
246 | struct dwz_file *dwz_file; | |
247 | ||
72dca2f5 FR |
248 | /* A flag indicating wether this objfile has a section loaded at a |
249 | VMA of 0. */ | |
250 | int has_section_at_zero; | |
9291a0cd | 251 | |
ae2de4f8 DE |
252 | /* True if we are using the mapped index, |
253 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
254 | unsigned char using_index; |
255 | ||
ae2de4f8 | 256 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 257 | struct mapped_index *index_table; |
98bfdba5 | 258 | |
7b9f3c50 | 259 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
260 | TUs typically share line table entries with a CU, so we maintain a |
261 | separate table of all line table entries to support the sharing. | |
262 | Note that while there can be way more TUs than CUs, we've already | |
263 | sorted all the TUs into "type unit groups", grouped by their | |
264 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
265 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
266 | htab_t quick_file_names_table; |
267 | ||
98bfdba5 PA |
268 | /* Set during partial symbol reading, to prevent queueing of full |
269 | symbols. */ | |
270 | int reading_partial_symbols; | |
673bfd45 | 271 | |
dee91e82 | 272 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 273 | This is NULL if not allocated yet. |
dee91e82 DE |
274 | The mapping is done via (CU/TU signature + DIE offset) -> type. */ |
275 | htab_t die_type_hash; | |
95554aad TT |
276 | |
277 | /* The CUs we recently read. */ | |
278 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
279 | }; |
280 | ||
281 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 282 | |
251d32d9 | 283 | /* Default names of the debugging sections. */ |
c906108c | 284 | |
233a11ab CS |
285 | /* Note that if the debugging section has been compressed, it might |
286 | have a name like .zdebug_info. */ | |
287 | ||
9cdd5dbd DE |
288 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
289 | { | |
251d32d9 TG |
290 | { ".debug_info", ".zdebug_info" }, |
291 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
292 | { ".debug_line", ".zdebug_line" }, | |
293 | { ".debug_loc", ".zdebug_loc" }, | |
294 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 295 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
296 | { ".debug_str", ".zdebug_str" }, |
297 | { ".debug_ranges", ".zdebug_ranges" }, | |
298 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 299 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
300 | { ".debug_frame", ".zdebug_frame" }, |
301 | { ".eh_frame", NULL }, | |
24d3216f TT |
302 | { ".gdb_index", ".zgdb_index" }, |
303 | 23 | |
251d32d9 | 304 | }; |
c906108c | 305 | |
80626a55 | 306 | /* List of DWO/DWP sections. */ |
3019eac3 | 307 | |
80626a55 | 308 | static const struct dwop_section_names |
3019eac3 DE |
309 | { |
310 | struct dwarf2_section_names abbrev_dwo; | |
311 | struct dwarf2_section_names info_dwo; | |
312 | struct dwarf2_section_names line_dwo; | |
313 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
314 | struct dwarf2_section_names macinfo_dwo; |
315 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
316 | struct dwarf2_section_names str_dwo; |
317 | struct dwarf2_section_names str_offsets_dwo; | |
318 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
319 | struct dwarf2_section_names cu_index; |
320 | struct dwarf2_section_names tu_index; | |
3019eac3 | 321 | } |
80626a55 | 322 | dwop_section_names = |
3019eac3 DE |
323 | { |
324 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
325 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
326 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
327 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
328 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
329 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
330 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
331 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
332 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
333 | { ".debug_cu_index", ".zdebug_cu_index" }, |
334 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
335 | }; |
336 | ||
c906108c SS |
337 | /* local data types */ |
338 | ||
107d2387 AC |
339 | /* The data in a compilation unit header, after target2host |
340 | translation, looks like this. */ | |
c906108c | 341 | struct comp_unit_head |
a738430d | 342 | { |
c764a876 | 343 | unsigned int length; |
a738430d | 344 | short version; |
a738430d MK |
345 | unsigned char addr_size; |
346 | unsigned char signed_addr_p; | |
b64f50a1 | 347 | sect_offset abbrev_offset; |
57349743 | 348 | |
a738430d MK |
349 | /* Size of file offsets; either 4 or 8. */ |
350 | unsigned int offset_size; | |
57349743 | 351 | |
a738430d MK |
352 | /* Size of the length field; either 4 or 12. */ |
353 | unsigned int initial_length_size; | |
57349743 | 354 | |
a738430d MK |
355 | /* Offset to the first byte of this compilation unit header in the |
356 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 357 | sect_offset offset; |
57349743 | 358 | |
d00adf39 DE |
359 | /* Offset to first die in this cu from the start of the cu. |
360 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 361 | cu_offset first_die_offset; |
a738430d | 362 | }; |
c906108c | 363 | |
3da10d80 KS |
364 | /* Type used for delaying computation of method physnames. |
365 | See comments for compute_delayed_physnames. */ | |
366 | struct delayed_method_info | |
367 | { | |
368 | /* The type to which the method is attached, i.e., its parent class. */ | |
369 | struct type *type; | |
370 | ||
371 | /* The index of the method in the type's function fieldlists. */ | |
372 | int fnfield_index; | |
373 | ||
374 | /* The index of the method in the fieldlist. */ | |
375 | int index; | |
376 | ||
377 | /* The name of the DIE. */ | |
378 | const char *name; | |
379 | ||
380 | /* The DIE associated with this method. */ | |
381 | struct die_info *die; | |
382 | }; | |
383 | ||
384 | typedef struct delayed_method_info delayed_method_info; | |
385 | DEF_VEC_O (delayed_method_info); | |
386 | ||
e7c27a73 DJ |
387 | /* Internal state when decoding a particular compilation unit. */ |
388 | struct dwarf2_cu | |
389 | { | |
390 | /* The objfile containing this compilation unit. */ | |
391 | struct objfile *objfile; | |
392 | ||
d00adf39 | 393 | /* The header of the compilation unit. */ |
e7c27a73 | 394 | struct comp_unit_head header; |
e142c38c | 395 | |
d00adf39 DE |
396 | /* Base address of this compilation unit. */ |
397 | CORE_ADDR base_address; | |
398 | ||
399 | /* Non-zero if base_address has been set. */ | |
400 | int base_known; | |
401 | ||
e142c38c DJ |
402 | /* The language we are debugging. */ |
403 | enum language language; | |
404 | const struct language_defn *language_defn; | |
405 | ||
b0f35d58 DL |
406 | const char *producer; |
407 | ||
e142c38c DJ |
408 | /* The generic symbol table building routines have separate lists for |
409 | file scope symbols and all all other scopes (local scopes). So | |
410 | we need to select the right one to pass to add_symbol_to_list(). | |
411 | We do it by keeping a pointer to the correct list in list_in_scope. | |
412 | ||
413 | FIXME: The original dwarf code just treated the file scope as the | |
414 | first local scope, and all other local scopes as nested local | |
415 | scopes, and worked fine. Check to see if we really need to | |
416 | distinguish these in buildsym.c. */ | |
417 | struct pending **list_in_scope; | |
418 | ||
433df2d4 DE |
419 | /* The abbrev table for this CU. |
420 | Normally this points to the abbrev table in the objfile. | |
421 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
422 | struct abbrev_table *abbrev_table; | |
72bf9492 | 423 | |
b64f50a1 JK |
424 | /* Hash table holding all the loaded partial DIEs |
425 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
426 | htab_t partial_dies; |
427 | ||
428 | /* Storage for things with the same lifetime as this read-in compilation | |
429 | unit, including partial DIEs. */ | |
430 | struct obstack comp_unit_obstack; | |
431 | ||
ae038cb0 DJ |
432 | /* When multiple dwarf2_cu structures are living in memory, this field |
433 | chains them all together, so that they can be released efficiently. | |
434 | We will probably also want a generation counter so that most-recently-used | |
435 | compilation units are cached... */ | |
436 | struct dwarf2_per_cu_data *read_in_chain; | |
437 | ||
438 | /* Backchain to our per_cu entry if the tree has been built. */ | |
439 | struct dwarf2_per_cu_data *per_cu; | |
440 | ||
441 | /* How many compilation units ago was this CU last referenced? */ | |
442 | int last_used; | |
443 | ||
b64f50a1 JK |
444 | /* A hash table of DIE cu_offset for following references with |
445 | die_info->offset.sect_off as hash. */ | |
51545339 | 446 | htab_t die_hash; |
10b3939b DJ |
447 | |
448 | /* Full DIEs if read in. */ | |
449 | struct die_info *dies; | |
450 | ||
451 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
452 | units referenced by this one. Only set during full symbol processing; | |
453 | partial symbol tables do not have dependencies. */ | |
454 | htab_t dependencies; | |
455 | ||
cb1df416 DJ |
456 | /* Header data from the line table, during full symbol processing. */ |
457 | struct line_header *line_header; | |
458 | ||
3da10d80 KS |
459 | /* A list of methods which need to have physnames computed |
460 | after all type information has been read. */ | |
461 | VEC (delayed_method_info) *method_list; | |
462 | ||
96408a79 SA |
463 | /* To be copied to symtab->call_site_htab. */ |
464 | htab_t call_site_htab; | |
465 | ||
034e5797 DE |
466 | /* Non-NULL if this CU came from a DWO file. |
467 | There is an invariant here that is important to remember: | |
468 | Except for attributes copied from the top level DIE in the "main" | |
469 | (or "stub") file in preparation for reading the DWO file | |
470 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
471 | Either there isn't a DWO file (in which case this is NULL and the point | |
472 | is moot), or there is and either we're not going to read it (in which | |
473 | case this is NULL) or there is and we are reading it (in which case this | |
474 | is non-NULL). */ | |
3019eac3 DE |
475 | struct dwo_unit *dwo_unit; |
476 | ||
477 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
478 | (zero is a valid value though). | |
479 | Note this value comes from the stub CU/TU's DIE. */ | |
480 | ULONGEST addr_base; | |
481 | ||
2e3cf129 DE |
482 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
483 | (zero is a valid value though). | |
484 | Note this value comes from the stub CU/TU's DIE. | |
485 | Also note that the value is zero in the non-DWO case so this value can | |
486 | be used without needing to know whether DWO files are in use or not. */ | |
487 | ULONGEST ranges_base; | |
488 | ||
ae038cb0 DJ |
489 | /* Mark used when releasing cached dies. */ |
490 | unsigned int mark : 1; | |
491 | ||
8be455d7 JK |
492 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
493 | This test is imperfect as there may exist optimized debug code not using | |
494 | any location list and still facing inlining issues if handled as | |
495 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 496 | unsigned int has_loclist : 1; |
ba919b58 | 497 | |
1b80a9fa JK |
498 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
499 | if all the producer_is_* fields are valid. This information is cached | |
500 | because profiling CU expansion showed excessive time spent in | |
501 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
502 | unsigned int checked_producer : 1; |
503 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 504 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 505 | unsigned int producer_is_icc : 1; |
e7c27a73 DJ |
506 | }; |
507 | ||
10b3939b DJ |
508 | /* Persistent data held for a compilation unit, even when not |
509 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 510 | read_symtab_private field of the psymtab. */ |
10b3939b | 511 | |
ae038cb0 DJ |
512 | struct dwarf2_per_cu_data |
513 | { | |
36586728 | 514 | /* The start offset and length of this compilation unit. |
45452591 | 515 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
516 | initial_length_size. |
517 | If the DIE refers to a DWO file, this is always of the original die, | |
518 | not the DWO file. */ | |
b64f50a1 | 519 | sect_offset offset; |
36586728 | 520 | unsigned int length; |
ae038cb0 DJ |
521 | |
522 | /* Flag indicating this compilation unit will be read in before | |
523 | any of the current compilation units are processed. */ | |
c764a876 | 524 | unsigned int queued : 1; |
ae038cb0 | 525 | |
0d99eb77 DE |
526 | /* This flag will be set when reading partial DIEs if we need to load |
527 | absolutely all DIEs for this compilation unit, instead of just the ones | |
528 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
529 | hash table and don't find it. */ |
530 | unsigned int load_all_dies : 1; | |
531 | ||
3019eac3 DE |
532 | /* Non-zero if this CU is from .debug_types. */ |
533 | unsigned int is_debug_types : 1; | |
534 | ||
36586728 TT |
535 | /* Non-zero if this CU is from the .dwz file. */ |
536 | unsigned int is_dwz : 1; | |
537 | ||
3019eac3 DE |
538 | /* The section this CU/TU lives in. |
539 | If the DIE refers to a DWO file, this is always the original die, | |
540 | not the DWO file. */ | |
541 | struct dwarf2_section_info *info_or_types_section; | |
348e048f | 542 | |
17ea53c3 JK |
543 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
544 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 545 | struct dwarf2_cu *cu; |
1c379e20 | 546 | |
9cdd5dbd DE |
547 | /* The corresponding objfile. |
548 | Normally we can get the objfile from dwarf2_per_objfile. | |
549 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
550 | struct objfile *objfile; |
551 | ||
552 | /* When using partial symbol tables, the 'psymtab' field is active. | |
553 | Otherwise the 'quick' field is active. */ | |
554 | union | |
555 | { | |
556 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 557 | or NULL for unread partial units. */ |
9291a0cd TT |
558 | struct partial_symtab *psymtab; |
559 | ||
560 | /* Data needed by the "quick" functions. */ | |
561 | struct dwarf2_per_cu_quick_data *quick; | |
562 | } v; | |
95554aad | 563 | |
f4dc4d17 DE |
564 | union |
565 | { | |
566 | /* The CUs we import using DW_TAG_imported_unit. This is filled in | |
567 | while reading psymtabs, used to compute the psymtab dependencies, | |
568 | and then cleared. Then it is filled in again while reading full | |
569 | symbols, and only deleted when the objfile is destroyed. */ | |
570 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; | |
571 | ||
572 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
573 | can share them. If this is a TU, this points to the containing | |
574 | symtab. */ | |
575 | struct type_unit_group *type_unit_group; | |
576 | } s; | |
ae038cb0 DJ |
577 | }; |
578 | ||
348e048f DE |
579 | /* Entry in the signatured_types hash table. */ |
580 | ||
581 | struct signatured_type | |
582 | { | |
42e7ad6c DE |
583 | /* The "per_cu" object of this type. |
584 | N.B.: This is the first member so that it's easy to convert pointers | |
585 | between them. */ | |
586 | struct dwarf2_per_cu_data per_cu; | |
587 | ||
3019eac3 | 588 | /* The type's signature. */ |
348e048f DE |
589 | ULONGEST signature; |
590 | ||
3019eac3 DE |
591 | /* Offset in the TU of the type's DIE, as read from the TU header. |
592 | If the definition lives in a DWO file, this value is unusable. */ | |
593 | cu_offset type_offset_in_tu; | |
594 | ||
595 | /* Offset in the section of the type's DIE. | |
596 | If the definition lives in a DWO file, this is the offset in the | |
597 | .debug_types.dwo section. | |
598 | The value is zero until the actual value is known. | |
599 | Zero is otherwise not a valid section offset. */ | |
600 | sect_offset type_offset_in_section; | |
348e048f DE |
601 | }; |
602 | ||
094b34ac DE |
603 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
604 | This includes type_unit_group and quick_file_names. */ | |
605 | ||
606 | struct stmt_list_hash | |
607 | { | |
608 | /* The DWO unit this table is from or NULL if there is none. */ | |
609 | struct dwo_unit *dwo_unit; | |
610 | ||
611 | /* Offset in .debug_line or .debug_line.dwo. */ | |
612 | sect_offset line_offset; | |
613 | }; | |
614 | ||
f4dc4d17 DE |
615 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
616 | an object of this type. */ | |
617 | ||
618 | struct type_unit_group | |
619 | { | |
620 | /* dwarf2read.c's main "handle" on the symtab. | |
621 | To simplify things we create an artificial CU that "includes" all the | |
622 | type units using this stmt_list so that the rest of the code still has | |
623 | a "per_cu" handle on the symtab. | |
624 | This PER_CU is recognized by having no section. */ | |
625 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL) | |
094b34ac DE |
626 | struct dwarf2_per_cu_data per_cu; |
627 | ||
628 | union | |
629 | { | |
630 | /* The TUs that share this DW_AT_stmt_list entry. | |
631 | This is added to while parsing type units to build partial symtabs, | |
632 | and is deleted afterwards and not used again. */ | |
633 | VEC (dwarf2_per_cu_ptr) *tus; | |
f4dc4d17 | 634 | |
094b34ac DE |
635 | /* When reading the line table in "quick" functions, we need a real TU. |
636 | Any will do, we know they all share the same DW_AT_stmt_list entry. | |
637 | For simplicity's sake, we pick the first one. */ | |
638 | struct dwarf2_per_cu_data *first_tu; | |
639 | } t; | |
f4dc4d17 DE |
640 | |
641 | /* The primary symtab. | |
094b34ac DE |
642 | Type units in a group needn't all be defined in the same source file, |
643 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
644 | struct symtab *primary_symtab; |
645 | ||
094b34ac DE |
646 | /* The data used to construct the hash key. */ |
647 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
648 | |
649 | /* The number of symtabs from the line header. | |
650 | The value here must match line_header.num_file_names. */ | |
651 | unsigned int num_symtabs; | |
652 | ||
653 | /* The symbol tables for this TU (obtained from the files listed in | |
654 | DW_AT_stmt_list). | |
655 | WARNING: The order of entries here must match the order of entries | |
656 | in the line header. After the first TU using this type_unit_group, the | |
657 | line header for the subsequent TUs is recreated from this. This is done | |
658 | because we need to use the same symtabs for each TU using the same | |
659 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
660 | there's no guarantee the line header doesn't have duplicate entries. */ | |
661 | struct symtab **symtabs; | |
662 | }; | |
663 | ||
80626a55 | 664 | /* These sections are what may appear in a DWO file. */ |
3019eac3 DE |
665 | |
666 | struct dwo_sections | |
667 | { | |
668 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
669 | struct dwarf2_section_info line; |
670 | struct dwarf2_section_info loc; | |
09262596 DE |
671 | struct dwarf2_section_info macinfo; |
672 | struct dwarf2_section_info macro; | |
3019eac3 DE |
673 | struct dwarf2_section_info str; |
674 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
675 | /* In the case of a virtual DWO file, these two are unused. */ |
676 | struct dwarf2_section_info info; | |
3019eac3 DE |
677 | VEC (dwarf2_section_info_def) *types; |
678 | }; | |
679 | ||
680 | /* Common bits of DWO CUs/TUs. */ | |
681 | ||
682 | struct dwo_unit | |
683 | { | |
684 | /* Backlink to the containing struct dwo_file. */ | |
685 | struct dwo_file *dwo_file; | |
686 | ||
687 | /* The "id" that distinguishes this CU/TU. | |
688 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
689 | Since signatures came first, we stick with it for consistency. */ | |
690 | ULONGEST signature; | |
691 | ||
692 | /* The section this CU/TU lives in, in the DWO file. */ | |
693 | struct dwarf2_section_info *info_or_types_section; | |
694 | ||
695 | /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */ | |
696 | sect_offset offset; | |
697 | unsigned int length; | |
698 | ||
699 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
700 | cu_offset type_offset_in_tu; | |
701 | }; | |
702 | ||
80626a55 DE |
703 | /* Data for one DWO file. |
704 | This includes virtual DWO files that have been packaged into a | |
705 | DWP file. */ | |
3019eac3 DE |
706 | |
707 | struct dwo_file | |
708 | { | |
80626a55 DE |
709 | /* The DW_AT_GNU_dwo_name attribute. This is the hash key. |
710 | For virtual DWO files the name is constructed from the section offsets | |
711 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
712 | from related CU+TUs. */ | |
713 | const char *name; | |
3019eac3 | 714 | |
80626a55 DE |
715 | /* The bfd, when the file is open. Otherwise this is NULL. |
716 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
717 | bfd *dbfd; | |
3019eac3 DE |
718 | |
719 | /* Section info for this file. */ | |
720 | struct dwo_sections sections; | |
721 | ||
722 | /* Table of CUs in the file. | |
723 | Each element is a struct dwo_unit. */ | |
724 | htab_t cus; | |
725 | ||
726 | /* Table of TUs in the file. | |
727 | Each element is a struct dwo_unit. */ | |
728 | htab_t tus; | |
729 | }; | |
730 | ||
80626a55 DE |
731 | /* These sections are what may appear in a DWP file. */ |
732 | ||
733 | struct dwp_sections | |
734 | { | |
735 | struct dwarf2_section_info str; | |
736 | struct dwarf2_section_info cu_index; | |
737 | struct dwarf2_section_info tu_index; | |
738 | /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced | |
739 | by section number. We don't need to record them here. */ | |
740 | }; | |
741 | ||
742 | /* These sections are what may appear in a virtual DWO file. */ | |
743 | ||
744 | struct virtual_dwo_sections | |
745 | { | |
746 | struct dwarf2_section_info abbrev; | |
747 | struct dwarf2_section_info line; | |
748 | struct dwarf2_section_info loc; | |
749 | struct dwarf2_section_info macinfo; | |
750 | struct dwarf2_section_info macro; | |
751 | struct dwarf2_section_info str_offsets; | |
752 | /* Each DWP hash table entry records one CU or one TU. | |
753 | That is recorded here, and copied to dwo_unit.info_or_types_section. */ | |
754 | struct dwarf2_section_info info_or_types; | |
755 | }; | |
756 | ||
757 | /* Contents of DWP hash tables. */ | |
758 | ||
759 | struct dwp_hash_table | |
760 | { | |
761 | uint32_t nr_units, nr_slots; | |
762 | const gdb_byte *hash_table, *unit_table, *section_pool; | |
763 | }; | |
764 | ||
765 | /* Data for one DWP file. */ | |
766 | ||
767 | struct dwp_file | |
768 | { | |
769 | /* Name of the file. */ | |
770 | const char *name; | |
771 | ||
772 | /* The bfd, when the file is open. Otherwise this is NULL. */ | |
773 | bfd *dbfd; | |
774 | ||
775 | /* Section info for this file. */ | |
776 | struct dwp_sections sections; | |
777 | ||
778 | /* Table of CUs in the file. */ | |
779 | const struct dwp_hash_table *cus; | |
780 | ||
781 | /* Table of TUs in the file. */ | |
782 | const struct dwp_hash_table *tus; | |
783 | ||
784 | /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ | |
785 | htab_t loaded_cutus; | |
786 | ||
787 | /* Table to map ELF section numbers to their sections. */ | |
788 | unsigned int num_sections; | |
789 | asection **elf_sections; | |
790 | }; | |
791 | ||
36586728 TT |
792 | /* This represents a '.dwz' file. */ |
793 | ||
794 | struct dwz_file | |
795 | { | |
796 | /* A dwz file can only contain a few sections. */ | |
797 | struct dwarf2_section_info abbrev; | |
798 | struct dwarf2_section_info info; | |
799 | struct dwarf2_section_info str; | |
800 | struct dwarf2_section_info line; | |
801 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 802 | struct dwarf2_section_info gdb_index; |
36586728 TT |
803 | |
804 | /* The dwz's BFD. */ | |
805 | bfd *dwz_bfd; | |
806 | }; | |
807 | ||
0963b4bd MS |
808 | /* Struct used to pass misc. parameters to read_die_and_children, et |
809 | al. which are used for both .debug_info and .debug_types dies. | |
810 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 811 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
812 | |
813 | struct die_reader_specs | |
814 | { | |
dee91e82 | 815 | /* die_section->asection->owner. */ |
93311388 DE |
816 | bfd* abfd; |
817 | ||
818 | /* The CU of the DIE we are parsing. */ | |
819 | struct dwarf2_cu *cu; | |
820 | ||
80626a55 | 821 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
822 | struct dwo_file *dwo_file; |
823 | ||
dee91e82 | 824 | /* The section the die comes from. |
3019eac3 | 825 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
826 | struct dwarf2_section_info *die_section; |
827 | ||
828 | /* die_section->buffer. */ | |
829 | gdb_byte *buffer; | |
f664829e DE |
830 | |
831 | /* The end of the buffer. */ | |
832 | const gdb_byte *buffer_end; | |
93311388 DE |
833 | }; |
834 | ||
fd820528 | 835 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 DE |
836 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
837 | gdb_byte *info_ptr, | |
838 | struct die_info *comp_unit_die, | |
839 | int has_children, | |
840 | void *data); | |
841 | ||
debd256d JB |
842 | /* The line number information for a compilation unit (found in the |
843 | .debug_line section) begins with a "statement program header", | |
844 | which contains the following information. */ | |
845 | struct line_header | |
846 | { | |
847 | unsigned int total_length; | |
848 | unsigned short version; | |
849 | unsigned int header_length; | |
850 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 851 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
852 | unsigned char default_is_stmt; |
853 | int line_base; | |
854 | unsigned char line_range; | |
855 | unsigned char opcode_base; | |
856 | ||
857 | /* standard_opcode_lengths[i] is the number of operands for the | |
858 | standard opcode whose value is i. This means that | |
859 | standard_opcode_lengths[0] is unused, and the last meaningful | |
860 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
861 | unsigned char *standard_opcode_lengths; | |
862 | ||
863 | /* The include_directories table. NOTE! These strings are not | |
864 | allocated with xmalloc; instead, they are pointers into | |
865 | debug_line_buffer. If you try to free them, `free' will get | |
866 | indigestion. */ | |
867 | unsigned int num_include_dirs, include_dirs_size; | |
868 | char **include_dirs; | |
869 | ||
870 | /* The file_names table. NOTE! These strings are not allocated | |
871 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
872 | Don't try to free them directly. */ | |
873 | unsigned int num_file_names, file_names_size; | |
874 | struct file_entry | |
c906108c | 875 | { |
debd256d JB |
876 | char *name; |
877 | unsigned int dir_index; | |
878 | unsigned int mod_time; | |
879 | unsigned int length; | |
aaa75496 | 880 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 881 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
882 | } *file_names; |
883 | ||
884 | /* The start and end of the statement program following this | |
6502dd73 | 885 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fe1b8b76 | 886 | gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 887 | }; |
c906108c SS |
888 | |
889 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 890 | need this much information. */ |
c906108c SS |
891 | struct partial_die_info |
892 | { | |
72bf9492 | 893 | /* Offset of this DIE. */ |
b64f50a1 | 894 | sect_offset offset; |
72bf9492 DJ |
895 | |
896 | /* DWARF-2 tag for this DIE. */ | |
897 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
898 | ||
72bf9492 DJ |
899 | /* Assorted flags describing the data found in this DIE. */ |
900 | unsigned int has_children : 1; | |
901 | unsigned int is_external : 1; | |
902 | unsigned int is_declaration : 1; | |
903 | unsigned int has_type : 1; | |
904 | unsigned int has_specification : 1; | |
905 | unsigned int has_pc_info : 1; | |
481860b3 | 906 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
907 | |
908 | /* Flag set if the SCOPE field of this structure has been | |
909 | computed. */ | |
910 | unsigned int scope_set : 1; | |
911 | ||
fa4028e9 JB |
912 | /* Flag set if the DIE has a byte_size attribute. */ |
913 | unsigned int has_byte_size : 1; | |
914 | ||
98bfdba5 PA |
915 | /* Flag set if any of the DIE's children are template arguments. */ |
916 | unsigned int has_template_arguments : 1; | |
917 | ||
abc72ce4 DE |
918 | /* Flag set if fixup_partial_die has been called on this die. */ |
919 | unsigned int fixup_called : 1; | |
920 | ||
36586728 TT |
921 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
922 | unsigned int is_dwz : 1; | |
923 | ||
924 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
925 | unsigned int spec_is_dwz : 1; | |
926 | ||
72bf9492 | 927 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 928 | sometimes a default name for unnamed DIEs. */ |
c906108c | 929 | char *name; |
72bf9492 | 930 | |
abc72ce4 DE |
931 | /* The linkage name, if present. */ |
932 | const char *linkage_name; | |
933 | ||
72bf9492 DJ |
934 | /* The scope to prepend to our children. This is generally |
935 | allocated on the comp_unit_obstack, so will disappear | |
936 | when this compilation unit leaves the cache. */ | |
937 | char *scope; | |
938 | ||
95554aad TT |
939 | /* Some data associated with the partial DIE. The tag determines |
940 | which field is live. */ | |
941 | union | |
942 | { | |
943 | /* The location description associated with this DIE, if any. */ | |
944 | struct dwarf_block *locdesc; | |
945 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
946 | sect_offset offset; | |
947 | } d; | |
72bf9492 DJ |
948 | |
949 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
950 | CORE_ADDR lowpc; |
951 | CORE_ADDR highpc; | |
72bf9492 | 952 | |
93311388 | 953 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 954 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
955 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
956 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
fe1b8b76 | 957 | gdb_byte *sibling; |
72bf9492 DJ |
958 | |
959 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
960 | DW_AT_specification (or DW_AT_abstract_origin or | |
961 | DW_AT_extension). */ | |
b64f50a1 | 962 | sect_offset spec_offset; |
72bf9492 DJ |
963 | |
964 | /* Pointers to this DIE's parent, first child, and next sibling, | |
965 | if any. */ | |
966 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
967 | }; |
968 | ||
0963b4bd | 969 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
970 | struct abbrev_info |
971 | { | |
972 | unsigned int number; /* number identifying abbrev */ | |
973 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
974 | unsigned short has_children; /* boolean */ |
975 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
976 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
977 | struct abbrev_info *next; /* next in chain */ | |
978 | }; | |
979 | ||
980 | struct attr_abbrev | |
981 | { | |
9d25dd43 DE |
982 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
983 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
984 | }; |
985 | ||
433df2d4 DE |
986 | /* Size of abbrev_table.abbrev_hash_table. */ |
987 | #define ABBREV_HASH_SIZE 121 | |
988 | ||
989 | /* Top level data structure to contain an abbreviation table. */ | |
990 | ||
991 | struct abbrev_table | |
992 | { | |
f4dc4d17 DE |
993 | /* Where the abbrev table came from. |
994 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
995 | sect_offset offset; |
996 | ||
997 | /* Storage for the abbrev table. */ | |
998 | struct obstack abbrev_obstack; | |
999 | ||
1000 | /* Hash table of abbrevs. | |
1001 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1002 | It could be statically allocated, but the previous code didn't so we | |
1003 | don't either. */ | |
1004 | struct abbrev_info **abbrevs; | |
1005 | }; | |
1006 | ||
0963b4bd | 1007 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1008 | struct attribute |
1009 | { | |
9d25dd43 | 1010 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1011 | ENUM_BITFIELD(dwarf_form) form : 15; |
1012 | ||
1013 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1014 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1015 | here for better struct attribute alignment. */ | |
1016 | unsigned int string_is_canonical : 1; | |
1017 | ||
b60c80d6 DJ |
1018 | union |
1019 | { | |
1020 | char *str; | |
1021 | struct dwarf_block *blk; | |
43bbcdc2 PH |
1022 | ULONGEST unsnd; |
1023 | LONGEST snd; | |
b60c80d6 | 1024 | CORE_ADDR addr; |
348e048f | 1025 | struct signatured_type *signatured_type; |
b60c80d6 DJ |
1026 | } |
1027 | u; | |
1028 | }; | |
1029 | ||
0963b4bd | 1030 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1031 | struct die_info |
1032 | { | |
76815b17 DE |
1033 | /* DWARF-2 tag for this DIE. */ |
1034 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1035 | ||
1036 | /* Number of attributes */ | |
98bfdba5 PA |
1037 | unsigned char num_attrs; |
1038 | ||
1039 | /* True if we're presently building the full type name for the | |
1040 | type derived from this DIE. */ | |
1041 | unsigned char building_fullname : 1; | |
76815b17 DE |
1042 | |
1043 | /* Abbrev number */ | |
1044 | unsigned int abbrev; | |
1045 | ||
93311388 | 1046 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1047 | sect_offset offset; |
78ba4af6 JB |
1048 | |
1049 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1050 | points to this die's parent; CHILD points to the first child of | |
1051 | this node; and all the children of a given node are chained | |
4950bc1c | 1052 | together via their SIBLING fields. */ |
639d11d3 DC |
1053 | struct die_info *child; /* Its first child, if any. */ |
1054 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1055 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1056 | |
b60c80d6 DJ |
1057 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1058 | zero, but it's not common and zero-sized arrays are not | |
1059 | sufficiently portable C. */ | |
1060 | struct attribute attrs[1]; | |
c906108c SS |
1061 | }; |
1062 | ||
0963b4bd | 1063 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1064 | |
1065 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1066 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1067 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1068 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1069 | #define DW_SND(attr) ((attr)->u.snd) | |
1070 | #define DW_ADDR(attr) ((attr)->u.addr) | |
348e048f | 1071 | #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type) |
c906108c | 1072 | |
0963b4bd | 1073 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1074 | struct dwarf_block |
1075 | { | |
56eb65bd | 1076 | size_t size; |
1d6edc3c JK |
1077 | |
1078 | /* Valid only if SIZE is not zero. */ | |
fe1b8b76 | 1079 | gdb_byte *data; |
c906108c SS |
1080 | }; |
1081 | ||
c906108c SS |
1082 | #ifndef ATTR_ALLOC_CHUNK |
1083 | #define ATTR_ALLOC_CHUNK 4 | |
1084 | #endif | |
1085 | ||
c906108c SS |
1086 | /* Allocate fields for structs, unions and enums in this size. */ |
1087 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1088 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1089 | #endif | |
1090 | ||
c906108c SS |
1091 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1092 | but this would require a corresponding change in unpack_field_as_long | |
1093 | and friends. */ | |
1094 | static int bits_per_byte = 8; | |
1095 | ||
1096 | /* The routines that read and process dies for a C struct or C++ class | |
1097 | pass lists of data member fields and lists of member function fields | |
1098 | in an instance of a field_info structure, as defined below. */ | |
1099 | struct field_info | |
c5aa993b | 1100 | { |
0963b4bd | 1101 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1102 | struct nextfield |
1103 | { | |
1104 | struct nextfield *next; | |
1105 | int accessibility; | |
1106 | int virtuality; | |
1107 | struct field field; | |
1108 | } | |
7d0ccb61 | 1109 | *fields, *baseclasses; |
c906108c | 1110 | |
7d0ccb61 | 1111 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1112 | int nfields; |
c906108c | 1113 | |
c5aa993b JM |
1114 | /* Number of baseclasses. */ |
1115 | int nbaseclasses; | |
c906108c | 1116 | |
c5aa993b JM |
1117 | /* Set if the accesibility of one of the fields is not public. */ |
1118 | int non_public_fields; | |
c906108c | 1119 | |
c5aa993b JM |
1120 | /* Member function fields array, entries are allocated in the order they |
1121 | are encountered in the object file. */ | |
1122 | struct nextfnfield | |
1123 | { | |
1124 | struct nextfnfield *next; | |
1125 | struct fn_field fnfield; | |
1126 | } | |
1127 | *fnfields; | |
c906108c | 1128 | |
c5aa993b JM |
1129 | /* Member function fieldlist array, contains name of possibly overloaded |
1130 | member function, number of overloaded member functions and a pointer | |
1131 | to the head of the member function field chain. */ | |
1132 | struct fnfieldlist | |
1133 | { | |
1134 | char *name; | |
1135 | int length; | |
1136 | struct nextfnfield *head; | |
1137 | } | |
1138 | *fnfieldlists; | |
c906108c | 1139 | |
c5aa993b JM |
1140 | /* Number of entries in the fnfieldlists array. */ |
1141 | int nfnfields; | |
98751a41 JK |
1142 | |
1143 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1144 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1145 | struct typedef_field_list | |
1146 | { | |
1147 | struct typedef_field field; | |
1148 | struct typedef_field_list *next; | |
1149 | } | |
1150 | *typedef_field_list; | |
1151 | unsigned typedef_field_list_count; | |
c5aa993b | 1152 | }; |
c906108c | 1153 | |
10b3939b DJ |
1154 | /* One item on the queue of compilation units to read in full symbols |
1155 | for. */ | |
1156 | struct dwarf2_queue_item | |
1157 | { | |
1158 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1159 | enum language pretend_language; |
10b3939b DJ |
1160 | struct dwarf2_queue_item *next; |
1161 | }; | |
1162 | ||
1163 | /* The current queue. */ | |
1164 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1165 | ||
ae038cb0 DJ |
1166 | /* Loaded secondary compilation units are kept in memory until they |
1167 | have not been referenced for the processing of this many | |
1168 | compilation units. Set this to zero to disable caching. Cache | |
1169 | sizes of up to at least twenty will improve startup time for | |
1170 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1171 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1172 | static void |
1173 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1174 | struct cmd_list_element *c, const char *value) | |
1175 | { | |
3e43a32a MS |
1176 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1177 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1178 | value); |
1179 | } | |
1180 | ||
ae038cb0 | 1181 | |
0963b4bd | 1182 | /* Various complaints about symbol reading that don't abort the process. */ |
c906108c | 1183 | |
4d3c2250 KB |
1184 | static void |
1185 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2e276125 | 1186 | { |
4d3c2250 | 1187 | complaint (&symfile_complaints, |
e2e0b3e5 | 1188 | _("statement list doesn't fit in .debug_line section")); |
4d3c2250 KB |
1189 | } |
1190 | ||
25e43795 DJ |
1191 | static void |
1192 | dwarf2_debug_line_missing_file_complaint (void) | |
1193 | { | |
1194 | complaint (&symfile_complaints, | |
1195 | _(".debug_line section has line data without a file")); | |
1196 | } | |
1197 | ||
59205f5a JB |
1198 | static void |
1199 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1200 | { | |
1201 | complaint (&symfile_complaints, | |
3e43a32a MS |
1202 | _(".debug_line section has line " |
1203 | "program sequence without an end")); | |
59205f5a JB |
1204 | } |
1205 | ||
4d3c2250 KB |
1206 | static void |
1207 | dwarf2_complex_location_expr_complaint (void) | |
2e276125 | 1208 | { |
e2e0b3e5 | 1209 | complaint (&symfile_complaints, _("location expression too complex")); |
4d3c2250 KB |
1210 | } |
1211 | ||
4d3c2250 KB |
1212 | static void |
1213 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1214 | int arg3) | |
2e276125 | 1215 | { |
4d3c2250 | 1216 | complaint (&symfile_complaints, |
3e43a32a MS |
1217 | _("const value length mismatch for '%s', got %d, expected %d"), |
1218 | arg1, arg2, arg3); | |
4d3c2250 KB |
1219 | } |
1220 | ||
1221 | static void | |
f664829e | 1222 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) |
2e276125 | 1223 | { |
4d3c2250 | 1224 | complaint (&symfile_complaints, |
f664829e DE |
1225 | _("debug info runs off end of %s section" |
1226 | " [in module %s]"), | |
1227 | section->asection->name, | |
1228 | bfd_get_filename (section->asection->owner)); | |
4d3c2250 KB |
1229 | } |
1230 | ||
1231 | static void | |
1232 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
8e19ed76 | 1233 | { |
4d3c2250 | 1234 | complaint (&symfile_complaints, |
3e43a32a MS |
1235 | _("macro debug info contains a " |
1236 | "malformed macro definition:\n`%s'"), | |
4d3c2250 KB |
1237 | arg1); |
1238 | } | |
1239 | ||
1240 | static void | |
1241 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
8b2dbe47 | 1242 | { |
4d3c2250 | 1243 | complaint (&symfile_complaints, |
3e43a32a MS |
1244 | _("invalid attribute class or form for '%s' in '%s'"), |
1245 | arg1, arg2); | |
4d3c2250 | 1246 | } |
c906108c | 1247 | |
c906108c SS |
1248 | /* local function prototypes */ |
1249 | ||
4efb68b1 | 1250 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1251 | |
aaa75496 JB |
1252 | static void dwarf2_create_include_psymtab (char *, struct partial_symtab *, |
1253 | struct objfile *); | |
1254 | ||
918dd910 JK |
1255 | static void dwarf2_find_base_address (struct die_info *die, |
1256 | struct dwarf2_cu *cu); | |
1257 | ||
c67a9c90 | 1258 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1259 | |
72bf9492 DJ |
1260 | static void scan_partial_symbols (struct partial_die_info *, |
1261 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1262 | int, struct dwarf2_cu *); |
c906108c | 1263 | |
72bf9492 DJ |
1264 | static void add_partial_symbol (struct partial_die_info *, |
1265 | struct dwarf2_cu *); | |
63d06c5c | 1266 | |
72bf9492 DJ |
1267 | static void add_partial_namespace (struct partial_die_info *pdi, |
1268 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1269 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1270 | |
5d7cb8df JK |
1271 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1272 | CORE_ADDR *highpc, int need_pc, | |
1273 | struct dwarf2_cu *cu); | |
1274 | ||
72bf9492 DJ |
1275 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1276 | struct dwarf2_cu *cu); | |
91c24f0a | 1277 | |
bc30ff58 JB |
1278 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1279 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1280 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1281 | |
a14ed312 | 1282 | static void dwarf2_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 1283 | |
a14ed312 | 1284 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1285 | |
433df2d4 DE |
1286 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1287 | (const struct abbrev_table *, unsigned int); | |
1288 | ||
1289 | static struct abbrev_table *abbrev_table_read_table | |
1290 | (struct dwarf2_section_info *, sect_offset); | |
1291 | ||
1292 | static void abbrev_table_free (struct abbrev_table *); | |
1293 | ||
f4dc4d17 DE |
1294 | static void abbrev_table_free_cleanup (void *); |
1295 | ||
dee91e82 DE |
1296 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1297 | struct dwarf2_section_info *); | |
c906108c | 1298 | |
f3dd6933 | 1299 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1300 | |
6caca83c CC |
1301 | static unsigned int peek_abbrev_code (bfd *, gdb_byte *); |
1302 | ||
dee91e82 DE |
1303 | static struct partial_die_info *load_partial_dies |
1304 | (const struct die_reader_specs *, gdb_byte *, int); | |
72bf9492 | 1305 | |
dee91e82 DE |
1306 | static gdb_byte *read_partial_die (const struct die_reader_specs *, |
1307 | struct partial_die_info *, | |
1308 | struct abbrev_info *, | |
1309 | unsigned int, | |
1310 | gdb_byte *); | |
c906108c | 1311 | |
36586728 | 1312 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1313 | struct dwarf2_cu *); |
72bf9492 DJ |
1314 | |
1315 | static void fixup_partial_die (struct partial_die_info *, | |
1316 | struct dwarf2_cu *); | |
1317 | ||
dee91e82 DE |
1318 | static gdb_byte *read_attribute (const struct die_reader_specs *, |
1319 | struct attribute *, struct attr_abbrev *, | |
1320 | gdb_byte *); | |
a8329558 | 1321 | |
a1855c1d | 1322 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1323 | |
a1855c1d | 1324 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1325 | |
a1855c1d | 1326 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1327 | |
a1855c1d | 1328 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1329 | |
a1855c1d | 1330 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1331 | |
fe1b8b76 | 1332 | static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1333 | unsigned int *); |
c906108c | 1334 | |
c764a876 DE |
1335 | static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *); |
1336 | ||
1337 | static LONGEST read_checked_initial_length_and_offset | |
1338 | (bfd *, gdb_byte *, const struct comp_unit_head *, | |
1339 | unsigned int *, unsigned int *); | |
613e1657 | 1340 | |
fe1b8b76 | 1341 | static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *, |
c764a876 DE |
1342 | unsigned int *); |
1343 | ||
1344 | static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int); | |
613e1657 | 1345 | |
f4dc4d17 DE |
1346 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1347 | sect_offset); | |
1348 | ||
fe1b8b76 | 1349 | static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int); |
c906108c | 1350 | |
9b1c24c8 | 1351 | static char *read_direct_string (bfd *, gdb_byte *, unsigned int *); |
c906108c | 1352 | |
fe1b8b76 JB |
1353 | static char *read_indirect_string (bfd *, gdb_byte *, |
1354 | const struct comp_unit_head *, | |
1355 | unsigned int *); | |
4bdf3d34 | 1356 | |
36586728 TT |
1357 | static char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
1358 | ||
12df843f | 1359 | static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 1360 | |
12df843f | 1361 | static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 1362 | |
3019eac3 DE |
1363 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *, |
1364 | unsigned int *); | |
1365 | ||
1366 | static char *read_str_index (const struct die_reader_specs *reader, | |
1367 | struct dwarf2_cu *cu, ULONGEST str_index); | |
1368 | ||
e142c38c | 1369 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1370 | |
e142c38c DJ |
1371 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1372 | struct dwarf2_cu *); | |
c906108c | 1373 | |
348e048f | 1374 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1375 | unsigned int); |
348e048f | 1376 | |
05cf31d1 JB |
1377 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1378 | struct dwarf2_cu *cu); | |
1379 | ||
e142c38c | 1380 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1381 | |
e142c38c | 1382 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1383 | struct dwarf2_cu **); |
63d06c5c | 1384 | |
debd256d JB |
1385 | static void free_line_header (struct line_header *lh); |
1386 | ||
aaa75496 JB |
1387 | static void add_file_name (struct line_header *, char *, unsigned int, |
1388 | unsigned int, unsigned int); | |
1389 | ||
3019eac3 DE |
1390 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1391 | struct dwarf2_cu *cu); | |
debd256d | 1392 | |
f3f5162e DE |
1393 | static void dwarf_decode_lines (struct line_header *, const char *, |
1394 | struct dwarf2_cu *, struct partial_symtab *, | |
1395 | int); | |
c906108c | 1396 | |
72b9f47f | 1397 | static void dwarf2_start_subfile (char *, const char *, const char *); |
c906108c | 1398 | |
f4dc4d17 DE |
1399 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
1400 | char *, char *, CORE_ADDR); | |
1401 | ||
a14ed312 | 1402 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1403 | struct dwarf2_cu *); |
c906108c | 1404 | |
34eaf542 TT |
1405 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1406 | struct dwarf2_cu *, struct symbol *); | |
1407 | ||
a14ed312 | 1408 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
e7c27a73 | 1409 | struct dwarf2_cu *); |
c906108c | 1410 | |
98bfdba5 PA |
1411 | static void dwarf2_const_value_attr (struct attribute *attr, |
1412 | struct type *type, | |
1413 | const char *name, | |
1414 | struct obstack *obstack, | |
12df843f | 1415 | struct dwarf2_cu *cu, LONGEST *value, |
98bfdba5 PA |
1416 | gdb_byte **bytes, |
1417 | struct dwarf2_locexpr_baton **baton); | |
2df3850c | 1418 | |
e7c27a73 | 1419 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1420 | |
b4ba55a1 JB |
1421 | static int need_gnat_info (struct dwarf2_cu *); |
1422 | ||
3e43a32a MS |
1423 | static struct type *die_descriptive_type (struct die_info *, |
1424 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1425 | |
1426 | static void set_descriptive_type (struct type *, struct die_info *, | |
1427 | struct dwarf2_cu *); | |
1428 | ||
e7c27a73 DJ |
1429 | static struct type *die_containing_type (struct die_info *, |
1430 | struct dwarf2_cu *); | |
c906108c | 1431 | |
673bfd45 DE |
1432 | static struct type *lookup_die_type (struct die_info *, struct attribute *, |
1433 | struct dwarf2_cu *); | |
c906108c | 1434 | |
f792889a | 1435 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1436 | |
673bfd45 DE |
1437 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1438 | ||
0d5cff50 | 1439 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1440 | |
6e70227d | 1441 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1442 | const char *suffix, int physname, |
1443 | struct dwarf2_cu *cu); | |
63d06c5c | 1444 | |
e7c27a73 | 1445 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1446 | |
348e048f DE |
1447 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1448 | ||
e7c27a73 | 1449 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1450 | |
e7c27a73 | 1451 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1452 | |
96408a79 SA |
1453 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1454 | ||
ff013f42 JK |
1455 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1456 | struct dwarf2_cu *, struct partial_symtab *); | |
1457 | ||
a14ed312 | 1458 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1459 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1460 | struct partial_symtab *); | |
c906108c | 1461 | |
fae299cd DC |
1462 | static void get_scope_pc_bounds (struct die_info *, |
1463 | CORE_ADDR *, CORE_ADDR *, | |
1464 | struct dwarf2_cu *); | |
1465 | ||
801e3a5b JB |
1466 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1467 | CORE_ADDR, struct dwarf2_cu *); | |
1468 | ||
a14ed312 | 1469 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1470 | struct dwarf2_cu *); |
c906108c | 1471 | |
a14ed312 | 1472 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1473 | struct type *, struct dwarf2_cu *); |
c906108c | 1474 | |
a14ed312 | 1475 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1476 | struct die_info *, struct type *, |
e7c27a73 | 1477 | struct dwarf2_cu *); |
c906108c | 1478 | |
a14ed312 | 1479 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1480 | struct type *, |
1481 | struct dwarf2_cu *); | |
c906108c | 1482 | |
134d01f1 | 1483 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1484 | |
e7c27a73 | 1485 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1486 | |
e7c27a73 | 1487 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1488 | |
5d7cb8df JK |
1489 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1490 | ||
27aa8d6a SW |
1491 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1492 | ||
f55ee35c JK |
1493 | static struct type *read_module_type (struct die_info *die, |
1494 | struct dwarf2_cu *cu); | |
1495 | ||
38d518c9 | 1496 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1497 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1498 | |
134d01f1 | 1499 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1500 | |
e7c27a73 | 1501 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1502 | |
6e70227d | 1503 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1504 | struct dwarf2_cu *); |
1505 | ||
dee91e82 | 1506 | static struct die_info *read_die_and_children (const struct die_reader_specs *, |
93311388 | 1507 | gdb_byte *info_ptr, |
fe1b8b76 | 1508 | gdb_byte **new_info_ptr, |
639d11d3 DC |
1509 | struct die_info *parent); |
1510 | ||
dee91e82 | 1511 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
93311388 | 1512 | gdb_byte *info_ptr, |
fe1b8b76 | 1513 | gdb_byte **new_info_ptr, |
639d11d3 DC |
1514 | struct die_info *parent); |
1515 | ||
3019eac3 DE |
1516 | static gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1517 | struct die_info **, gdb_byte *, int *, int); | |
1518 | ||
dee91e82 DE |
1519 | static gdb_byte *read_full_die (const struct die_reader_specs *, |
1520 | struct die_info **, gdb_byte *, int *); | |
93311388 | 1521 | |
e7c27a73 | 1522 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1523 | |
71c25dea TT |
1524 | static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *, |
1525 | struct obstack *); | |
1526 | ||
e142c38c | 1527 | static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1528 | |
98bfdba5 PA |
1529 | static const char *dwarf2_full_name (char *name, |
1530 | struct die_info *die, | |
1531 | struct dwarf2_cu *cu); | |
1532 | ||
e142c38c | 1533 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1534 | struct dwarf2_cu **); |
9219021c | 1535 | |
f39c6ffd | 1536 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1537 | |
f39c6ffd | 1538 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1539 | |
f39c6ffd | 1540 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1541 | |
a14ed312 | 1542 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1543 | |
f39c6ffd | 1544 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1545 | |
f9aca02d | 1546 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1547 | |
d97bc12b DE |
1548 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1549 | ||
1550 | static void dump_die_for_error (struct die_info *); | |
1551 | ||
1552 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1553 | struct die_info *); | |
c906108c | 1554 | |
d97bc12b | 1555 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1556 | |
51545339 | 1557 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1558 | struct dwarf2_cu *); |
c906108c | 1559 | |
93311388 DE |
1560 | static int is_ref_attr (struct attribute *); |
1561 | ||
b64f50a1 | 1562 | static sect_offset dwarf2_get_ref_die_offset (struct attribute *); |
c906108c | 1563 | |
43bbcdc2 | 1564 | static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int); |
a02abb62 | 1565 | |
348e048f DE |
1566 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
1567 | struct attribute *, | |
1568 | struct dwarf2_cu **); | |
1569 | ||
10b3939b DJ |
1570 | static struct die_info *follow_die_ref (struct die_info *, |
1571 | struct attribute *, | |
f2f0e013 | 1572 | struct dwarf2_cu **); |
c906108c | 1573 | |
348e048f DE |
1574 | static struct die_info *follow_die_sig (struct die_info *, |
1575 | struct attribute *, | |
1576 | struct dwarf2_cu **); | |
1577 | ||
6c83ed52 TT |
1578 | static struct signatured_type *lookup_signatured_type_at_offset |
1579 | (struct objfile *objfile, | |
b64f50a1 | 1580 | struct dwarf2_section_info *section, sect_offset offset); |
6c83ed52 | 1581 | |
e5fe5e75 | 1582 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1583 | |
52dc124a | 1584 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1585 | |
f4dc4d17 | 1586 | static struct type_unit_group *get_type_unit_group |
094b34ac | 1587 | (struct dwarf2_cu *, struct attribute *); |
f4dc4d17 DE |
1588 | |
1589 | static void build_type_unit_groups (die_reader_func_ftype *, void *); | |
1590 | ||
c906108c SS |
1591 | /* memory allocation interface */ |
1592 | ||
7b5a2f43 | 1593 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1594 | |
b60c80d6 | 1595 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1596 | |
09262596 DE |
1597 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
1598 | char *, int); | |
2e276125 | 1599 | |
8e19ed76 PS |
1600 | static int attr_form_is_block (struct attribute *); |
1601 | ||
3690dd37 JB |
1602 | static int attr_form_is_section_offset (struct attribute *); |
1603 | ||
1604 | static int attr_form_is_constant (struct attribute *); | |
1605 | ||
8cf6f0b1 TT |
1606 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1607 | struct dwarf2_loclist_baton *baton, | |
1608 | struct attribute *attr); | |
1609 | ||
93e7bd98 DJ |
1610 | static void dwarf2_symbol_mark_computed (struct attribute *attr, |
1611 | struct symbol *sym, | |
1612 | struct dwarf2_cu *cu); | |
4c2df51b | 1613 | |
dee91e82 DE |
1614 | static gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1615 | gdb_byte *info_ptr, | |
1616 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1617 | |
72bf9492 DJ |
1618 | static void free_stack_comp_unit (void *); |
1619 | ||
72bf9492 DJ |
1620 | static hashval_t partial_die_hash (const void *item); |
1621 | ||
1622 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1623 | ||
ae038cb0 | 1624 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1625 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1626 | |
9816fde3 | 1627 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1628 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1629 | |
1630 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1631 | struct die_info *comp_unit_die, |
1632 | enum language pretend_language); | |
93311388 | 1633 | |
68dc6402 | 1634 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1635 | |
1636 | static void free_cached_comp_units (void *); | |
1637 | ||
1638 | static void age_cached_comp_units (void); | |
1639 | ||
dee91e82 | 1640 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1641 | |
f792889a DJ |
1642 | static struct type *set_die_type (struct die_info *, struct type *, |
1643 | struct dwarf2_cu *); | |
1c379e20 | 1644 | |
ae038cb0 DJ |
1645 | static void create_all_comp_units (struct objfile *); |
1646 | ||
0e50663e | 1647 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1648 | |
95554aad TT |
1649 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1650 | enum language); | |
10b3939b | 1651 | |
95554aad TT |
1652 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1653 | enum language); | |
10b3939b | 1654 | |
f4dc4d17 DE |
1655 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1656 | enum language); | |
1657 | ||
10b3939b DJ |
1658 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1659 | struct dwarf2_per_cu_data *); | |
1660 | ||
ae038cb0 DJ |
1661 | static void dwarf2_mark (struct dwarf2_cu *); |
1662 | ||
1663 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1664 | ||
b64f50a1 | 1665 | static struct type *get_die_type_at_offset (sect_offset, |
673bfd45 DE |
1666 | struct dwarf2_per_cu_data *per_cu); |
1667 | ||
f792889a | 1668 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1669 | |
9291a0cd TT |
1670 | static void dwarf2_release_queue (void *dummy); |
1671 | ||
95554aad TT |
1672 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1673 | enum language pretend_language); | |
1674 | ||
1675 | static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
1676 | struct dwarf2_per_cu_data *per_cu, | |
1677 | enum language pretend_language); | |
9291a0cd | 1678 | |
a0f42c21 | 1679 | static void process_queue (void); |
9291a0cd TT |
1680 | |
1681 | static void find_file_and_directory (struct die_info *die, | |
1682 | struct dwarf2_cu *cu, | |
1683 | char **name, char **comp_dir); | |
1684 | ||
1685 | static char *file_full_name (int file, struct line_header *lh, | |
1686 | const char *comp_dir); | |
1687 | ||
36586728 TT |
1688 | static gdb_byte *read_and_check_comp_unit_head |
1689 | (struct comp_unit_head *header, | |
1690 | struct dwarf2_section_info *section, | |
1691 | struct dwarf2_section_info *abbrev_section, gdb_byte *info_ptr, | |
1692 | int is_debug_types_section); | |
1693 | ||
fd820528 | 1694 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1695 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1696 | int use_existing_cu, int keep, | |
3019eac3 DE |
1697 | die_reader_func_ftype *die_reader_func, void *data); |
1698 | ||
dee91e82 DE |
1699 | static void init_cutu_and_read_dies_simple |
1700 | (struct dwarf2_per_cu_data *this_cu, | |
1701 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1702 | |
673bfd45 | 1703 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1704 | |
3019eac3 DE |
1705 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1706 | ||
1707 | static struct dwo_unit *lookup_dwo_comp_unit | |
a1855c1d | 1708 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1709 | |
1710 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1711 | (struct signatured_type *, const char *, const char *); |
3019eac3 DE |
1712 | |
1713 | static void free_dwo_file_cleanup (void *); | |
1714 | ||
95554aad TT |
1715 | static void process_cu_includes (void); |
1716 | ||
1b80a9fa JK |
1717 | static void check_producer (struct dwarf2_cu *cu); |
1718 | ||
9291a0cd TT |
1719 | #if WORDS_BIGENDIAN |
1720 | ||
1721 | /* Convert VALUE between big- and little-endian. */ | |
1722 | static offset_type | |
1723 | byte_swap (offset_type value) | |
1724 | { | |
1725 | offset_type result; | |
1726 | ||
1727 | result = (value & 0xff) << 24; | |
1728 | result |= (value & 0xff00) << 8; | |
1729 | result |= (value & 0xff0000) >> 8; | |
1730 | result |= (value & 0xff000000) >> 24; | |
1731 | return result; | |
1732 | } | |
1733 | ||
1734 | #define MAYBE_SWAP(V) byte_swap (V) | |
1735 | ||
1736 | #else | |
1737 | #define MAYBE_SWAP(V) (V) | |
1738 | #endif /* WORDS_BIGENDIAN */ | |
1739 | ||
1740 | /* The suffix for an index file. */ | |
1741 | #define INDEX_SUFFIX ".gdb-index" | |
1742 | ||
3da10d80 KS |
1743 | static const char *dwarf2_physname (char *name, struct die_info *die, |
1744 | struct dwarf2_cu *cu); | |
1745 | ||
c906108c | 1746 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1747 | information and return true if we have enough to do something. |
1748 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1749 | ELF names are used. */ | |
c906108c SS |
1750 | |
1751 | int | |
251d32d9 TG |
1752 | dwarf2_has_info (struct objfile *objfile, |
1753 | const struct dwarf2_debug_sections *names) | |
c906108c | 1754 | { |
be391dca TT |
1755 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1756 | if (!dwarf2_per_objfile) | |
1757 | { | |
1758 | /* Initialize per-objfile state. */ | |
1759 | struct dwarf2_per_objfile *data | |
1760 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1761 | |
be391dca TT |
1762 | memset (data, 0, sizeof (*data)); |
1763 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1764 | dwarf2_per_objfile = data; | |
6502dd73 | 1765 | |
251d32d9 TG |
1766 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1767 | (void *) names); | |
be391dca TT |
1768 | dwarf2_per_objfile->objfile = objfile; |
1769 | } | |
1770 | return (dwarf2_per_objfile->info.asection != NULL | |
1771 | && dwarf2_per_objfile->abbrev.asection != NULL); | |
c906108c SS |
1772 | } |
1773 | ||
251d32d9 TG |
1774 | /* When loading sections, we look either for uncompressed section or for |
1775 | compressed section names. */ | |
233a11ab CS |
1776 | |
1777 | static int | |
251d32d9 TG |
1778 | section_is_p (const char *section_name, |
1779 | const struct dwarf2_section_names *names) | |
233a11ab | 1780 | { |
251d32d9 TG |
1781 | if (names->normal != NULL |
1782 | && strcmp (section_name, names->normal) == 0) | |
1783 | return 1; | |
1784 | if (names->compressed != NULL | |
1785 | && strcmp (section_name, names->compressed) == 0) | |
1786 | return 1; | |
1787 | return 0; | |
233a11ab CS |
1788 | } |
1789 | ||
c906108c SS |
1790 | /* This function is mapped across the sections and remembers the |
1791 | offset and size of each of the debugging sections we are interested | |
1792 | in. */ | |
1793 | ||
1794 | static void | |
251d32d9 | 1795 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 1796 | { |
251d32d9 | 1797 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 1798 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
1799 | |
1800 | if (vnames == NULL) | |
1801 | names = &dwarf2_elf_names; | |
1802 | else | |
1803 | names = (const struct dwarf2_debug_sections *) vnames; | |
1804 | ||
dc7650b8 JK |
1805 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1806 | { | |
1807 | } | |
1808 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 1809 | { |
dce234bc PP |
1810 | dwarf2_per_objfile->info.asection = sectp; |
1811 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); | |
c906108c | 1812 | } |
251d32d9 | 1813 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 1814 | { |
dce234bc PP |
1815 | dwarf2_per_objfile->abbrev.asection = sectp; |
1816 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 1817 | } |
251d32d9 | 1818 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 1819 | { |
dce234bc PP |
1820 | dwarf2_per_objfile->line.asection = sectp; |
1821 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); | |
c906108c | 1822 | } |
251d32d9 | 1823 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 1824 | { |
dce234bc PP |
1825 | dwarf2_per_objfile->loc.asection = sectp; |
1826 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); | |
c906108c | 1827 | } |
251d32d9 | 1828 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 1829 | { |
dce234bc PP |
1830 | dwarf2_per_objfile->macinfo.asection = sectp; |
1831 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 1832 | } |
cf2c3c16 TT |
1833 | else if (section_is_p (sectp->name, &names->macro)) |
1834 | { | |
1835 | dwarf2_per_objfile->macro.asection = sectp; | |
1836 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); | |
1837 | } | |
251d32d9 | 1838 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 1839 | { |
dce234bc PP |
1840 | dwarf2_per_objfile->str.asection = sectp; |
1841 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); | |
c906108c | 1842 | } |
3019eac3 DE |
1843 | else if (section_is_p (sectp->name, &names->addr)) |
1844 | { | |
1845 | dwarf2_per_objfile->addr.asection = sectp; | |
1846 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); | |
1847 | } | |
251d32d9 | 1848 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 1849 | { |
dce234bc PP |
1850 | dwarf2_per_objfile->frame.asection = sectp; |
1851 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1852 | } |
251d32d9 | 1853 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 1854 | { |
dc7650b8 JK |
1855 | dwarf2_per_objfile->eh_frame.asection = sectp; |
1856 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1857 | } |
251d32d9 | 1858 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 1859 | { |
dce234bc PP |
1860 | dwarf2_per_objfile->ranges.asection = sectp; |
1861 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 1862 | } |
251d32d9 | 1863 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 1864 | { |
8b70b953 TT |
1865 | struct dwarf2_section_info type_section; |
1866 | ||
1867 | memset (&type_section, 0, sizeof (type_section)); | |
1868 | type_section.asection = sectp; | |
1869 | type_section.size = bfd_get_section_size (sectp); | |
1870 | ||
1871 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
1872 | &type_section); | |
348e048f | 1873 | } |
251d32d9 | 1874 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd TT |
1875 | { |
1876 | dwarf2_per_objfile->gdb_index.asection = sectp; | |
1877 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); | |
1878 | } | |
dce234bc | 1879 | |
72dca2f5 FR |
1880 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
1881 | && bfd_section_vma (abfd, sectp) == 0) | |
1882 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
1883 | } |
1884 | ||
fceca515 DE |
1885 | /* A helper function that decides whether a section is empty, |
1886 | or not present. */ | |
9e0ac564 TT |
1887 | |
1888 | static int | |
1889 | dwarf2_section_empty_p (struct dwarf2_section_info *info) | |
1890 | { | |
1891 | return info->asection == NULL || info->size == 0; | |
1892 | } | |
1893 | ||
3019eac3 DE |
1894 | /* Read the contents of the section INFO. |
1895 | OBJFILE is the main object file, but not necessarily the file where | |
1896 | the section comes from. E.g., for DWO files INFO->asection->owner | |
1897 | is the bfd of the DWO file. | |
dce234bc | 1898 | If the section is compressed, uncompress it before returning. */ |
c906108c | 1899 | |
dce234bc PP |
1900 | static void |
1901 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 1902 | { |
dce234bc | 1903 | asection *sectp = info->asection; |
3019eac3 | 1904 | bfd *abfd; |
dce234bc PP |
1905 | gdb_byte *buf, *retbuf; |
1906 | unsigned char header[4]; | |
c906108c | 1907 | |
be391dca TT |
1908 | if (info->readin) |
1909 | return; | |
dce234bc | 1910 | info->buffer = NULL; |
be391dca | 1911 | info->readin = 1; |
188dd5d6 | 1912 | |
9e0ac564 | 1913 | if (dwarf2_section_empty_p (info)) |
dce234bc | 1914 | return; |
c906108c | 1915 | |
3019eac3 DE |
1916 | abfd = sectp->owner; |
1917 | ||
4bf44c1c TT |
1918 | /* If the section has relocations, we must read it ourselves. |
1919 | Otherwise we attach it to the BFD. */ | |
1920 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 1921 | { |
4bf44c1c | 1922 | const gdb_byte *bytes = gdb_bfd_map_section (sectp, &info->size); |
dce234bc | 1923 | |
4bf44c1c TT |
1924 | /* We have to cast away const here for historical reasons. |
1925 | Fixing dwarf2read to be const-correct would be quite nice. */ | |
1926 | info->buffer = (gdb_byte *) bytes; | |
1927 | return; | |
dce234bc | 1928 | } |
dce234bc | 1929 | |
4bf44c1c TT |
1930 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
1931 | info->buffer = buf; | |
dce234bc PP |
1932 | |
1933 | /* When debugging .o files, we may need to apply relocations; see | |
1934 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
1935 | We never compress sections in .o files, so we only need to | |
1936 | try this when the section is not compressed. */ | |
ac8035ab | 1937 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
1938 | if (retbuf != NULL) |
1939 | { | |
1940 | info->buffer = retbuf; | |
1941 | return; | |
1942 | } | |
1943 | ||
1944 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
1945 | || bfd_bread (buf, info->size, abfd) != info->size) | |
1946 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
1947 | bfd_get_filename (abfd)); | |
1948 | } | |
1949 | ||
9e0ac564 TT |
1950 | /* A helper function that returns the size of a section in a safe way. |
1951 | If you are positive that the section has been read before using the | |
1952 | size, then it is safe to refer to the dwarf2_section_info object's | |
1953 | "size" field directly. In other cases, you must call this | |
1954 | function, because for compressed sections the size field is not set | |
1955 | correctly until the section has been read. */ | |
1956 | ||
1957 | static bfd_size_type | |
1958 | dwarf2_section_size (struct objfile *objfile, | |
1959 | struct dwarf2_section_info *info) | |
1960 | { | |
1961 | if (!info->readin) | |
1962 | dwarf2_read_section (objfile, info); | |
1963 | return info->size; | |
1964 | } | |
1965 | ||
dce234bc | 1966 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 1967 | SECTION_NAME. */ |
af34e669 | 1968 | |
dce234bc | 1969 | void |
3017a003 TG |
1970 | dwarf2_get_section_info (struct objfile *objfile, |
1971 | enum dwarf2_section_enum sect, | |
dce234bc PP |
1972 | asection **sectp, gdb_byte **bufp, |
1973 | bfd_size_type *sizep) | |
1974 | { | |
1975 | struct dwarf2_per_objfile *data | |
1976 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
1977 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
1978 | |
1979 | /* We may see an objfile without any DWARF, in which case we just | |
1980 | return nothing. */ | |
1981 | if (data == NULL) | |
1982 | { | |
1983 | *sectp = NULL; | |
1984 | *bufp = NULL; | |
1985 | *sizep = 0; | |
1986 | return; | |
1987 | } | |
3017a003 TG |
1988 | switch (sect) |
1989 | { | |
1990 | case DWARF2_DEBUG_FRAME: | |
1991 | info = &data->frame; | |
1992 | break; | |
1993 | case DWARF2_EH_FRAME: | |
1994 | info = &data->eh_frame; | |
1995 | break; | |
1996 | default: | |
1997 | gdb_assert_not_reached ("unexpected section"); | |
1998 | } | |
dce234bc | 1999 | |
9e0ac564 | 2000 | dwarf2_read_section (objfile, info); |
dce234bc PP |
2001 | |
2002 | *sectp = info->asection; | |
2003 | *bufp = info->buffer; | |
2004 | *sizep = info->size; | |
2005 | } | |
2006 | ||
36586728 TT |
2007 | /* A helper function to find the sections for a .dwz file. */ |
2008 | ||
2009 | static void | |
2010 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2011 | { | |
2012 | struct dwz_file *dwz_file = arg; | |
2013 | ||
2014 | /* Note that we only support the standard ELF names, because .dwz | |
2015 | is ELF-only (at the time of writing). */ | |
2016 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2017 | { | |
2018 | dwz_file->abbrev.asection = sectp; | |
2019 | dwz_file->abbrev.size = bfd_get_section_size (sectp); | |
2020 | } | |
2021 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2022 | { | |
2023 | dwz_file->info.asection = sectp; | |
2024 | dwz_file->info.size = bfd_get_section_size (sectp); | |
2025 | } | |
2026 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2027 | { | |
2028 | dwz_file->str.asection = sectp; | |
2029 | dwz_file->str.size = bfd_get_section_size (sectp); | |
2030 | } | |
2031 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2032 | { | |
2033 | dwz_file->line.asection = sectp; | |
2034 | dwz_file->line.size = bfd_get_section_size (sectp); | |
2035 | } | |
2036 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2037 | { | |
2038 | dwz_file->macro.asection = sectp; | |
2039 | dwz_file->macro.size = bfd_get_section_size (sectp); | |
2040 | } | |
2ec9a5e0 TT |
2041 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2042 | { | |
2043 | dwz_file->gdb_index.asection = sectp; | |
2044 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); | |
2045 | } | |
36586728 TT |
2046 | } |
2047 | ||
2048 | /* Open the separate '.dwz' debug file, if needed. Error if the file | |
2049 | cannot be found. */ | |
2050 | ||
2051 | static struct dwz_file * | |
2052 | dwarf2_get_dwz_file (void) | |
2053 | { | |
2054 | bfd *abfd, *dwz_bfd; | |
2055 | asection *section; | |
2056 | gdb_byte *data; | |
2057 | struct cleanup *cleanup; | |
2058 | const char *filename; | |
2059 | struct dwz_file *result; | |
2060 | ||
2061 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2062 | return dwarf2_per_objfile->dwz_file; | |
2063 | ||
2064 | abfd = dwarf2_per_objfile->objfile->obfd; | |
2065 | section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink"); | |
2066 | if (section == NULL) | |
2067 | error (_("could not find '.gnu_debugaltlink' section")); | |
2068 | if (!bfd_malloc_and_get_section (abfd, section, &data)) | |
2069 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2070 | bfd_errmsg (bfd_get_error ())); | |
2071 | cleanup = make_cleanup (xfree, data); | |
2072 | ||
2073 | filename = data; | |
2074 | if (!IS_ABSOLUTE_PATH (filename)) | |
2075 | { | |
2076 | char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name); | |
2077 | char *rel; | |
2078 | ||
2079 | make_cleanup (xfree, abs); | |
2080 | abs = ldirname (abs); | |
2081 | make_cleanup (xfree, abs); | |
2082 | ||
2083 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2084 | make_cleanup (xfree, rel); | |
2085 | filename = rel; | |
2086 | } | |
2087 | ||
2088 | /* The format is just a NUL-terminated file name, followed by the | |
2089 | build-id. For now, though, we ignore the build-id. */ | |
2090 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); | |
2091 | if (dwz_bfd == NULL) | |
2092 | error (_("could not read '%s': %s"), filename, | |
2093 | bfd_errmsg (bfd_get_error ())); | |
2094 | ||
2095 | if (!bfd_check_format (dwz_bfd, bfd_object)) | |
2096 | { | |
2097 | gdb_bfd_unref (dwz_bfd); | |
2098 | error (_("file '%s' was not usable: %s"), filename, | |
2099 | bfd_errmsg (bfd_get_error ())); | |
2100 | } | |
2101 | ||
2102 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, | |
2103 | struct dwz_file); | |
2104 | result->dwz_bfd = dwz_bfd; | |
2105 | ||
2106 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2107 | ||
2108 | do_cleanups (cleanup); | |
2109 | ||
2110 | return result; | |
2111 | } | |
9291a0cd | 2112 | \f |
7b9f3c50 DE |
2113 | /* DWARF quick_symbols_functions support. */ |
2114 | ||
2115 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2116 | unique line tables, so we maintain a separate table of all .debug_line | |
2117 | derived entries to support the sharing. | |
2118 | All the quick functions need is the list of file names. We discard the | |
2119 | line_header when we're done and don't need to record it here. */ | |
2120 | struct quick_file_names | |
2121 | { | |
094b34ac DE |
2122 | /* The data used to construct the hash key. */ |
2123 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2124 | |
2125 | /* The number of entries in file_names, real_names. */ | |
2126 | unsigned int num_file_names; | |
2127 | ||
2128 | /* The file names from the line table, after being run through | |
2129 | file_full_name. */ | |
2130 | const char **file_names; | |
2131 | ||
2132 | /* The file names from the line table after being run through | |
2133 | gdb_realpath. These are computed lazily. */ | |
2134 | const char **real_names; | |
2135 | }; | |
2136 | ||
2137 | /* When using the index (and thus not using psymtabs), each CU has an | |
2138 | object of this type. This is used to hold information needed by | |
2139 | the various "quick" methods. */ | |
2140 | struct dwarf2_per_cu_quick_data | |
2141 | { | |
2142 | /* The file table. This can be NULL if there was no file table | |
2143 | or it's currently not read in. | |
2144 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2145 | struct quick_file_names *file_names; | |
2146 | ||
2147 | /* The corresponding symbol table. This is NULL if symbols for this | |
2148 | CU have not yet been read. */ | |
2149 | struct symtab *symtab; | |
2150 | ||
2151 | /* A temporary mark bit used when iterating over all CUs in | |
2152 | expand_symtabs_matching. */ | |
2153 | unsigned int mark : 1; | |
2154 | ||
2155 | /* True if we've tried to read the file table and found there isn't one. | |
2156 | There will be no point in trying to read it again next time. */ | |
2157 | unsigned int no_file_data : 1; | |
2158 | }; | |
2159 | ||
094b34ac DE |
2160 | /* Utility hash function for a stmt_list_hash. */ |
2161 | ||
2162 | static hashval_t | |
2163 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2164 | { | |
2165 | hashval_t v = 0; | |
2166 | ||
2167 | if (stmt_list_hash->dwo_unit != NULL) | |
2168 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2169 | v += stmt_list_hash->line_offset.sect_off; | |
2170 | return v; | |
2171 | } | |
2172 | ||
2173 | /* Utility equality function for a stmt_list_hash. */ | |
2174 | ||
2175 | static int | |
2176 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2177 | const struct stmt_list_hash *rhs) | |
2178 | { | |
2179 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2180 | return 0; | |
2181 | if (lhs->dwo_unit != NULL | |
2182 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2183 | return 0; | |
2184 | ||
2185 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2186 | } | |
2187 | ||
7b9f3c50 DE |
2188 | /* Hash function for a quick_file_names. */ |
2189 | ||
2190 | static hashval_t | |
2191 | hash_file_name_entry (const void *e) | |
2192 | { | |
2193 | const struct quick_file_names *file_data = e; | |
2194 | ||
094b34ac | 2195 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2196 | } |
2197 | ||
2198 | /* Equality function for a quick_file_names. */ | |
2199 | ||
2200 | static int | |
2201 | eq_file_name_entry (const void *a, const void *b) | |
2202 | { | |
2203 | const struct quick_file_names *ea = a; | |
2204 | const struct quick_file_names *eb = b; | |
2205 | ||
094b34ac | 2206 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2207 | } |
2208 | ||
2209 | /* Delete function for a quick_file_names. */ | |
2210 | ||
2211 | static void | |
2212 | delete_file_name_entry (void *e) | |
2213 | { | |
2214 | struct quick_file_names *file_data = e; | |
2215 | int i; | |
2216 | ||
2217 | for (i = 0; i < file_data->num_file_names; ++i) | |
2218 | { | |
2219 | xfree ((void*) file_data->file_names[i]); | |
2220 | if (file_data->real_names) | |
2221 | xfree ((void*) file_data->real_names[i]); | |
2222 | } | |
2223 | ||
2224 | /* The space for the struct itself lives on objfile_obstack, | |
2225 | so we don't free it here. */ | |
2226 | } | |
2227 | ||
2228 | /* Create a quick_file_names hash table. */ | |
2229 | ||
2230 | static htab_t | |
2231 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2232 | { | |
2233 | return htab_create_alloc (nr_initial_entries, | |
2234 | hash_file_name_entry, eq_file_name_entry, | |
2235 | delete_file_name_entry, xcalloc, xfree); | |
2236 | } | |
9291a0cd | 2237 | |
918dd910 JK |
2238 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2239 | have to be created afterwards. You should call age_cached_comp_units after | |
2240 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2241 | ||
2242 | static void | |
2243 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2244 | { | |
3019eac3 | 2245 | if (per_cu->is_debug_types) |
e5fe5e75 | 2246 | load_full_type_unit (per_cu); |
918dd910 | 2247 | else |
95554aad | 2248 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2249 | |
918dd910 | 2250 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2251 | |
2252 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2253 | } |
2254 | ||
a0f42c21 | 2255 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2256 | |
9291a0cd | 2257 | static void |
a0f42c21 | 2258 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2259 | { |
2260 | struct cleanup *back_to; | |
2261 | ||
f4dc4d17 DE |
2262 | /* Skip type_unit_groups, reading the type units they contain |
2263 | is handled elsewhere. */ | |
2264 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2265 | return; | |
2266 | ||
9291a0cd TT |
2267 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2268 | ||
95554aad TT |
2269 | if (dwarf2_per_objfile->using_index |
2270 | ? per_cu->v.quick->symtab == NULL | |
2271 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2272 | { | |
2273 | queue_comp_unit (per_cu, language_minimal); | |
2274 | load_cu (per_cu); | |
2275 | } | |
9291a0cd | 2276 | |
a0f42c21 | 2277 | process_queue (); |
9291a0cd TT |
2278 | |
2279 | /* Age the cache, releasing compilation units that have not | |
2280 | been used recently. */ | |
2281 | age_cached_comp_units (); | |
2282 | ||
2283 | do_cleanups (back_to); | |
2284 | } | |
2285 | ||
2286 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2287 | the objfile from which this CU came. Returns the resulting symbol | |
2288 | table. */ | |
2fdf6df6 | 2289 | |
9291a0cd | 2290 | static struct symtab * |
a0f42c21 | 2291 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2292 | { |
95554aad | 2293 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2294 | if (!per_cu->v.quick->symtab) |
2295 | { | |
2296 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2297 | increment_reading_symtab (); | |
a0f42c21 | 2298 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2299 | process_cu_includes (); |
9291a0cd TT |
2300 | do_cleanups (back_to); |
2301 | } | |
2302 | return per_cu->v.quick->symtab; | |
2303 | } | |
2304 | ||
f4dc4d17 DE |
2305 | /* Return the CU given its index. |
2306 | ||
2307 | This is intended for loops like: | |
2308 | ||
2309 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2310 | + dwarf2_per_objfile->n_type_units); ++i) | |
2311 | { | |
2312 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
2313 | ||
2314 | ...; | |
2315 | } | |
2316 | */ | |
2fdf6df6 | 2317 | |
1fd400ff TT |
2318 | static struct dwarf2_per_cu_data * |
2319 | dw2_get_cu (int index) | |
2320 | { | |
2321 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2322 | { | |
f4dc4d17 | 2323 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2324 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2325 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2326 | } |
2327 | ||
2328 | return dwarf2_per_objfile->all_comp_units[index]; | |
2329 | } | |
2330 | ||
2331 | /* Return the primary CU given its index. | |
2332 | The difference between this function and dw2_get_cu is in the handling | |
2333 | of type units (TUs). Here we return the type_unit_group object. | |
2334 | ||
2335 | This is intended for loops like: | |
2336 | ||
2337 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2338 | + dwarf2_per_objfile->n_type_unit_groups); ++i) | |
2339 | { | |
2340 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); | |
2341 | ||
2342 | ...; | |
2343 | } | |
2344 | */ | |
2345 | ||
2346 | static struct dwarf2_per_cu_data * | |
2347 | dw2_get_primary_cu (int index) | |
2348 | { | |
2349 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2350 | { | |
1fd400ff | 2351 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2352 | gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups); |
2353 | return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu; | |
1fd400ff | 2354 | } |
f4dc4d17 | 2355 | |
1fd400ff TT |
2356 | return dwarf2_per_objfile->all_comp_units[index]; |
2357 | } | |
2358 | ||
2ec9a5e0 TT |
2359 | /* A helper for create_cus_from_index that handles a given list of |
2360 | CUs. */ | |
2fdf6df6 | 2361 | |
74a0d9f6 | 2362 | static void |
2ec9a5e0 TT |
2363 | create_cus_from_index_list (struct objfile *objfile, |
2364 | const gdb_byte *cu_list, offset_type n_elements, | |
2365 | struct dwarf2_section_info *section, | |
2366 | int is_dwz, | |
2367 | int base_offset) | |
9291a0cd TT |
2368 | { |
2369 | offset_type i; | |
9291a0cd | 2370 | |
2ec9a5e0 | 2371 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2372 | { |
2373 | struct dwarf2_per_cu_data *the_cu; | |
2374 | ULONGEST offset, length; | |
2375 | ||
74a0d9f6 JK |
2376 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2377 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2378 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2379 | cu_list += 2 * 8; |
2380 | ||
2381 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2382 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2383 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2384 | the_cu->length = length; |
2385 | the_cu->objfile = objfile; | |
2ec9a5e0 | 2386 | the_cu->info_or_types_section = section; |
9291a0cd TT |
2387 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2388 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2389 | the_cu->is_dwz = is_dwz; |
2390 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2391 | } |
9291a0cd TT |
2392 | } |
2393 | ||
2ec9a5e0 | 2394 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2395 | the CU objects for this objfile. */ |
2ec9a5e0 | 2396 | |
74a0d9f6 | 2397 | static void |
2ec9a5e0 TT |
2398 | create_cus_from_index (struct objfile *objfile, |
2399 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2400 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2401 | { | |
2402 | struct dwz_file *dwz; | |
2403 | ||
2404 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2405 | dwarf2_per_objfile->all_comp_units | |
2406 | = obstack_alloc (&objfile->objfile_obstack, | |
2407 | dwarf2_per_objfile->n_comp_units | |
2408 | * sizeof (struct dwarf2_per_cu_data *)); | |
2409 | ||
74a0d9f6 JK |
2410 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2411 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2412 | |
2413 | if (dwz_elements == 0) | |
74a0d9f6 | 2414 | return; |
2ec9a5e0 TT |
2415 | |
2416 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2417 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2418 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2419 | } |
2420 | ||
1fd400ff | 2421 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2422 | |
74a0d9f6 | 2423 | static void |
673bfd45 | 2424 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2425 | struct dwarf2_section_info *section, |
673bfd45 DE |
2426 | const gdb_byte *bytes, |
2427 | offset_type elements) | |
1fd400ff TT |
2428 | { |
2429 | offset_type i; | |
673bfd45 | 2430 | htab_t sig_types_hash; |
1fd400ff | 2431 | |
d467dd73 DE |
2432 | dwarf2_per_objfile->n_type_units = elements / 3; |
2433 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 2434 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 2435 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 2436 | * sizeof (struct signatured_type *)); |
1fd400ff | 2437 | |
673bfd45 | 2438 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2439 | |
2440 | for (i = 0; i < elements; i += 3) | |
2441 | { | |
52dc124a DE |
2442 | struct signatured_type *sig_type; |
2443 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2444 | void **slot; |
2445 | ||
74a0d9f6 JK |
2446 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2447 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2448 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2449 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2450 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2451 | bytes += 3 * 8; | |
2452 | ||
52dc124a | 2453 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2454 | struct signatured_type); |
52dc124a | 2455 | sig_type->signature = signature; |
3019eac3 DE |
2456 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2457 | sig_type->per_cu.is_debug_types = 1; | |
2458 | sig_type->per_cu.info_or_types_section = section; | |
52dc124a DE |
2459 | sig_type->per_cu.offset.sect_off = offset; |
2460 | sig_type->per_cu.objfile = objfile; | |
2461 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2462 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2463 | struct dwarf2_per_cu_quick_data); | |
2464 | ||
52dc124a DE |
2465 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2466 | *slot = sig_type; | |
1fd400ff | 2467 | |
b4dd5633 | 2468 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2469 | } |
2470 | ||
673bfd45 | 2471 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2472 | } |
2473 | ||
9291a0cd TT |
2474 | /* Read the address map data from the mapped index, and use it to |
2475 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2476 | |
9291a0cd TT |
2477 | static void |
2478 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2479 | { | |
2480 | const gdb_byte *iter, *end; | |
2481 | struct obstack temp_obstack; | |
2482 | struct addrmap *mutable_map; | |
2483 | struct cleanup *cleanup; | |
2484 | CORE_ADDR baseaddr; | |
2485 | ||
2486 | obstack_init (&temp_obstack); | |
2487 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2488 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2489 | ||
2490 | iter = index->address_table; | |
2491 | end = iter + index->address_table_size; | |
2492 | ||
2493 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2494 | ||
2495 | while (iter < end) | |
2496 | { | |
2497 | ULONGEST hi, lo, cu_index; | |
2498 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2499 | iter += 8; | |
2500 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2501 | iter += 8; | |
2502 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2503 | iter += 4; | |
2504 | ||
2505 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
1fd400ff | 2506 | dw2_get_cu (cu_index)); |
9291a0cd TT |
2507 | } |
2508 | ||
2509 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2510 | &objfile->objfile_obstack); | |
2511 | do_cleanups (cleanup); | |
2512 | } | |
2513 | ||
59d7bcaf JK |
2514 | /* The hash function for strings in the mapped index. This is the same as |
2515 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2516 | implementation. This is necessary because the hash function is tied to the | |
2517 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2518 | SYMBOL_HASH_NEXT. |
2519 | ||
2520 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2521 | |
9291a0cd | 2522 | static hashval_t |
559a7a62 | 2523 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2524 | { |
2525 | const unsigned char *str = (const unsigned char *) p; | |
2526 | hashval_t r = 0; | |
2527 | unsigned char c; | |
2528 | ||
2529 | while ((c = *str++) != 0) | |
559a7a62 JK |
2530 | { |
2531 | if (index_version >= 5) | |
2532 | c = tolower (c); | |
2533 | r = r * 67 + c - 113; | |
2534 | } | |
9291a0cd TT |
2535 | |
2536 | return r; | |
2537 | } | |
2538 | ||
2539 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2540 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2541 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2542 | |
9291a0cd TT |
2543 | static int |
2544 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2545 | offset_type **vec_out) | |
2546 | { | |
0cf03b49 JK |
2547 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2548 | offset_type hash; | |
9291a0cd | 2549 | offset_type slot, step; |
559a7a62 | 2550 | int (*cmp) (const char *, const char *); |
9291a0cd | 2551 | |
0cf03b49 JK |
2552 | if (current_language->la_language == language_cplus |
2553 | || current_language->la_language == language_java | |
2554 | || current_language->la_language == language_fortran) | |
2555 | { | |
2556 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2557 | not contain any. */ | |
2558 | const char *paren = strchr (name, '('); | |
2559 | ||
2560 | if (paren) | |
2561 | { | |
2562 | char *dup; | |
2563 | ||
2564 | dup = xmalloc (paren - name + 1); | |
2565 | memcpy (dup, name, paren - name); | |
2566 | dup[paren - name] = 0; | |
2567 | ||
2568 | make_cleanup (xfree, dup); | |
2569 | name = dup; | |
2570 | } | |
2571 | } | |
2572 | ||
559a7a62 | 2573 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2574 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2575 | simulate our NAME being searched is also lowercased. */ |
2576 | hash = mapped_index_string_hash ((index->version == 4 | |
2577 | && case_sensitivity == case_sensitive_off | |
2578 | ? 5 : index->version), | |
2579 | name); | |
2580 | ||
3876f04e DE |
2581 | slot = hash & (index->symbol_table_slots - 1); |
2582 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2583 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2584 | |
2585 | for (;;) | |
2586 | { | |
2587 | /* Convert a slot number to an offset into the table. */ | |
2588 | offset_type i = 2 * slot; | |
2589 | const char *str; | |
3876f04e | 2590 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2591 | { |
2592 | do_cleanups (back_to); | |
2593 | return 0; | |
2594 | } | |
9291a0cd | 2595 | |
3876f04e | 2596 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2597 | if (!cmp (name, str)) |
9291a0cd TT |
2598 | { |
2599 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2600 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2601 | do_cleanups (back_to); |
9291a0cd TT |
2602 | return 1; |
2603 | } | |
2604 | ||
3876f04e | 2605 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2606 | } |
2607 | } | |
2608 | ||
2ec9a5e0 TT |
2609 | /* A helper function that reads the .gdb_index from SECTION and fills |
2610 | in MAP. FILENAME is the name of the file containing the section; | |
2611 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2612 | ok to use deprecated sections. | |
2613 | ||
2614 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2615 | out parameters that are filled in with information about the CU and | |
2616 | TU lists in the section. | |
2617 | ||
2618 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2619 | |
9291a0cd | 2620 | static int |
2ec9a5e0 TT |
2621 | read_index_from_section (struct objfile *objfile, |
2622 | const char *filename, | |
2623 | int deprecated_ok, | |
2624 | struct dwarf2_section_info *section, | |
2625 | struct mapped_index *map, | |
2626 | const gdb_byte **cu_list, | |
2627 | offset_type *cu_list_elements, | |
2628 | const gdb_byte **types_list, | |
2629 | offset_type *types_list_elements) | |
9291a0cd | 2630 | { |
9291a0cd | 2631 | char *addr; |
2ec9a5e0 | 2632 | offset_type version; |
b3b272e1 | 2633 | offset_type *metadata; |
1fd400ff | 2634 | int i; |
9291a0cd | 2635 | |
2ec9a5e0 | 2636 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2637 | return 0; |
82430852 JK |
2638 | |
2639 | /* Older elfutils strip versions could keep the section in the main | |
2640 | executable while splitting it for the separate debug info file. */ | |
2ec9a5e0 | 2641 | if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
2642 | return 0; |
2643 | ||
2ec9a5e0 | 2644 | dwarf2_read_section (objfile, section); |
9291a0cd | 2645 | |
2ec9a5e0 | 2646 | addr = section->buffer; |
9291a0cd | 2647 | /* Version check. */ |
1fd400ff | 2648 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2649 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2650 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2651 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2652 | indices. */ |
831adc1f | 2653 | if (version < 4) |
481860b3 GB |
2654 | { |
2655 | static int warning_printed = 0; | |
2656 | if (!warning_printed) | |
2657 | { | |
2658 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2659 | filename); |
481860b3 GB |
2660 | warning_printed = 1; |
2661 | } | |
2662 | return 0; | |
2663 | } | |
2664 | /* Index version 4 uses a different hash function than index version | |
2665 | 5 and later. | |
2666 | ||
2667 | Versions earlier than 6 did not emit psymbols for inlined | |
2668 | functions. Using these files will cause GDB not to be able to | |
2669 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2670 | indices unless the user has done |
2671 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2672 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2673 | { |
2674 | static int warning_printed = 0; | |
2675 | if (!warning_printed) | |
2676 | { | |
e615022a DE |
2677 | warning (_("\ |
2678 | Skipping deprecated .gdb_index section in %s.\n\ | |
2679 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2680 | to use the section anyway."), | |
2ec9a5e0 | 2681 | filename); |
481860b3 GB |
2682 | warning_printed = 1; |
2683 | } | |
2684 | return 0; | |
2685 | } | |
2686 | /* Indexes with higher version than the one supported by GDB may be no | |
594e8718 | 2687 | longer backward compatible. */ |
156942c7 | 2688 | if (version > 7) |
594e8718 | 2689 | return 0; |
9291a0cd | 2690 | |
559a7a62 | 2691 | map->version = version; |
2ec9a5e0 | 2692 | map->total_size = section->size; |
9291a0cd TT |
2693 | |
2694 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
2695 | |
2696 | i = 0; | |
2ec9a5e0 TT |
2697 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2698 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2699 | / 8); | |
1fd400ff TT |
2700 | ++i; |
2701 | ||
2ec9a5e0 TT |
2702 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2703 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2704 | - MAYBE_SWAP (metadata[i])) | |
2705 | / 8); | |
987d643c | 2706 | ++i; |
1fd400ff TT |
2707 | |
2708 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
2709 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
2710 | - MAYBE_SWAP (metadata[i])); | |
2711 | ++i; | |
2712 | ||
3876f04e DE |
2713 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
2714 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
2715 | - MAYBE_SWAP (metadata[i])) | |
2716 | / (2 * sizeof (offset_type))); | |
1fd400ff | 2717 | ++i; |
9291a0cd | 2718 | |
1fd400ff TT |
2719 | map->constant_pool = addr + MAYBE_SWAP (metadata[i]); |
2720 | ||
2ec9a5e0 TT |
2721 | return 1; |
2722 | } | |
2723 | ||
2724 | ||
2725 | /* Read the index file. If everything went ok, initialize the "quick" | |
2726 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
2727 | ||
2728 | static int | |
2729 | dwarf2_read_index (struct objfile *objfile) | |
2730 | { | |
2731 | struct mapped_index local_map, *map; | |
2732 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
2733 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
2734 | ||
2735 | if (!read_index_from_section (objfile, objfile->name, | |
2736 | use_deprecated_index_sections, | |
2737 | &dwarf2_per_objfile->gdb_index, &local_map, | |
2738 | &cu_list, &cu_list_elements, | |
2739 | &types_list, &types_list_elements)) | |
2740 | return 0; | |
2741 | ||
0fefef59 | 2742 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 2743 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
2744 | return 0; |
2745 | ||
2ec9a5e0 TT |
2746 | /* If there is a .dwz file, read it so we can get its CU list as |
2747 | well. */ | |
2748 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
2749 | { | |
2750 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
2751 | struct mapped_index dwz_map; | |
2752 | const gdb_byte *dwz_types_ignore; | |
2753 | offset_type dwz_types_elements_ignore; | |
2754 | ||
2755 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
2756 | 1, | |
2757 | &dwz->gdb_index, &dwz_map, | |
2758 | &dwz_list, &dwz_list_elements, | |
2759 | &dwz_types_ignore, | |
2760 | &dwz_types_elements_ignore)) | |
2761 | { | |
2762 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
2763 | bfd_get_filename (dwz->dwz_bfd)); | |
2764 | return 0; | |
2765 | } | |
2766 | } | |
2767 | ||
74a0d9f6 JK |
2768 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
2769 | dwz_list_elements); | |
1fd400ff | 2770 | |
8b70b953 TT |
2771 | if (types_list_elements) |
2772 | { | |
2773 | struct dwarf2_section_info *section; | |
2774 | ||
2775 | /* We can only handle a single .debug_types when we have an | |
2776 | index. */ | |
2777 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
2778 | return 0; | |
2779 | ||
2780 | section = VEC_index (dwarf2_section_info_def, | |
2781 | dwarf2_per_objfile->types, 0); | |
2782 | ||
74a0d9f6 JK |
2783 | create_signatured_type_table_from_index (objfile, section, types_list, |
2784 | types_list_elements); | |
8b70b953 | 2785 | } |
9291a0cd | 2786 | |
2ec9a5e0 TT |
2787 | create_addrmap_from_index (objfile, &local_map); |
2788 | ||
2789 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
2790 | *map = local_map; | |
9291a0cd TT |
2791 | |
2792 | dwarf2_per_objfile->index_table = map; | |
2793 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
2794 | dwarf2_per_objfile->quick_file_names_table = |
2795 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
2796 | |
2797 | return 1; | |
2798 | } | |
2799 | ||
2800 | /* A helper for the "quick" functions which sets the global | |
2801 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 2802 | |
9291a0cd TT |
2803 | static void |
2804 | dw2_setup (struct objfile *objfile) | |
2805 | { | |
2806 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
2807 | gdb_assert (dwarf2_per_objfile); | |
2808 | } | |
2809 | ||
f4dc4d17 DE |
2810 | /* Reader function for dw2_build_type_unit_groups. */ |
2811 | ||
2812 | static void | |
2813 | dw2_build_type_unit_groups_reader (const struct die_reader_specs *reader, | |
2814 | gdb_byte *info_ptr, | |
2815 | struct die_info *type_unit_die, | |
2816 | int has_children, | |
2817 | void *data) | |
2818 | { | |
2819 | struct dwarf2_cu *cu = reader->cu; | |
f4dc4d17 DE |
2820 | struct attribute *attr; |
2821 | struct type_unit_group *tu_group; | |
2822 | ||
2823 | gdb_assert (data == NULL); | |
2824 | ||
2825 | if (! has_children) | |
2826 | return; | |
2827 | ||
2828 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
2829 | /* Call this for its side-effect of creating the associated | |
2830 | struct type_unit_group if it doesn't already exist. */ | |
094b34ac | 2831 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 DE |
2832 | } |
2833 | ||
2834 | /* Build dwarf2_per_objfile->type_unit_groups. | |
2835 | This function may be called multiple times. */ | |
2836 | ||
2837 | static void | |
2838 | dw2_build_type_unit_groups (void) | |
2839 | { | |
2840 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
2841 | build_type_unit_groups (dw2_build_type_unit_groups_reader, NULL); | |
2842 | } | |
2843 | ||
dee91e82 | 2844 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2845 | |
dee91e82 DE |
2846 | static void |
2847 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
2848 | gdb_byte *info_ptr, | |
2849 | struct die_info *comp_unit_die, | |
2850 | int has_children, | |
2851 | void *data) | |
9291a0cd | 2852 | { |
dee91e82 DE |
2853 | struct dwarf2_cu *cu = reader->cu; |
2854 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
2855 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 2856 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 2857 | struct line_header *lh; |
9291a0cd | 2858 | struct attribute *attr; |
dee91e82 | 2859 | int i; |
9291a0cd | 2860 | char *name, *comp_dir; |
7b9f3c50 DE |
2861 | void **slot; |
2862 | struct quick_file_names *qfn; | |
2863 | unsigned int line_offset; | |
9291a0cd | 2864 | |
07261596 TT |
2865 | /* Our callers never want to match partial units -- instead they |
2866 | will match the enclosing full CU. */ | |
2867 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
2868 | { | |
2869 | this_cu->v.quick->no_file_data = 1; | |
2870 | return; | |
2871 | } | |
2872 | ||
094b34ac DE |
2873 | /* If we're reading the line header for TUs, store it in the "per_cu" |
2874 | for tu_group. */ | |
2875 | if (this_cu->is_debug_types) | |
2876 | { | |
2877 | struct type_unit_group *tu_group = data; | |
2878 | ||
2879 | gdb_assert (tu_group != NULL); | |
2880 | lh_cu = &tu_group->per_cu; | |
2881 | } | |
2882 | else | |
2883 | lh_cu = this_cu; | |
2884 | ||
7b9f3c50 DE |
2885 | lh = NULL; |
2886 | slot = NULL; | |
2887 | line_offset = 0; | |
dee91e82 DE |
2888 | |
2889 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
2890 | if (attr) |
2891 | { | |
7b9f3c50 DE |
2892 | struct quick_file_names find_entry; |
2893 | ||
2894 | line_offset = DW_UNSND (attr); | |
2895 | ||
2896 | /* We may have already read in this line header (TU line header sharing). | |
2897 | If we have we're done. */ | |
094b34ac DE |
2898 | find_entry.hash.dwo_unit = cu->dwo_unit; |
2899 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2900 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
2901 | &find_entry, INSERT); | |
2902 | if (*slot != NULL) | |
2903 | { | |
094b34ac | 2904 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 2905 | return; |
7b9f3c50 DE |
2906 | } |
2907 | ||
3019eac3 | 2908 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
2909 | } |
2910 | if (lh == NULL) | |
2911 | { | |
094b34ac | 2912 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 2913 | return; |
9291a0cd TT |
2914 | } |
2915 | ||
7b9f3c50 | 2916 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
2917 | qfn->hash.dwo_unit = cu->dwo_unit; |
2918 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2919 | gdb_assert (slot != NULL); |
2920 | *slot = qfn; | |
9291a0cd | 2921 | |
dee91e82 | 2922 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 2923 | |
7b9f3c50 DE |
2924 | qfn->num_file_names = lh->num_file_names; |
2925 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
2926 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 2927 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
2928 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
2929 | qfn->real_names = NULL; | |
9291a0cd | 2930 | |
7b9f3c50 | 2931 | free_line_header (lh); |
7b9f3c50 | 2932 | |
094b34ac | 2933 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
2934 | } |
2935 | ||
2936 | /* A helper for the "quick" functions which attempts to read the line | |
2937 | table for THIS_CU. */ | |
2938 | ||
2939 | static struct quick_file_names * | |
2940 | dw2_get_file_names (struct objfile *objfile, | |
2941 | struct dwarf2_per_cu_data *this_cu) | |
2942 | { | |
f4dc4d17 DE |
2943 | /* For TUs this should only be called on the parent group. */ |
2944 | if (this_cu->is_debug_types) | |
2945 | gdb_assert (IS_TYPE_UNIT_GROUP (this_cu)); | |
2946 | ||
dee91e82 DE |
2947 | if (this_cu->v.quick->file_names != NULL) |
2948 | return this_cu->v.quick->file_names; | |
2949 | /* If we know there is no line data, no point in looking again. */ | |
2950 | if (this_cu->v.quick->no_file_data) | |
2951 | return NULL; | |
2952 | ||
3019eac3 DE |
2953 | /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute |
2954 | in the stub for CUs, there's is no need to lookup the DWO file. | |
2955 | However, that's not the case for TUs where DW_AT_stmt_list lives in the | |
2956 | DWO file. */ | |
2957 | if (this_cu->is_debug_types) | |
094b34ac DE |
2958 | { |
2959 | struct type_unit_group *tu_group = this_cu->s.type_unit_group; | |
2960 | ||
2961 | init_cutu_and_read_dies (tu_group->t.first_tu, NULL, 0, 0, | |
2962 | dw2_get_file_names_reader, tu_group); | |
2963 | } | |
3019eac3 DE |
2964 | else |
2965 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); | |
dee91e82 DE |
2966 | |
2967 | if (this_cu->v.quick->no_file_data) | |
2968 | return NULL; | |
2969 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
2970 | } |
2971 | ||
2972 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 2973 | real path for a given file name from the line table. */ |
2fdf6df6 | 2974 | |
9291a0cd | 2975 | static const char * |
7b9f3c50 DE |
2976 | dw2_get_real_path (struct objfile *objfile, |
2977 | struct quick_file_names *qfn, int index) | |
9291a0cd | 2978 | { |
7b9f3c50 DE |
2979 | if (qfn->real_names == NULL) |
2980 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
2981 | qfn->num_file_names, sizeof (char *)); | |
9291a0cd | 2982 | |
7b9f3c50 DE |
2983 | if (qfn->real_names[index] == NULL) |
2984 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 2985 | |
7b9f3c50 | 2986 | return qfn->real_names[index]; |
9291a0cd TT |
2987 | } |
2988 | ||
2989 | static struct symtab * | |
2990 | dw2_find_last_source_symtab (struct objfile *objfile) | |
2991 | { | |
2992 | int index; | |
ae2de4f8 | 2993 | |
9291a0cd TT |
2994 | dw2_setup (objfile); |
2995 | index = dwarf2_per_objfile->n_comp_units - 1; | |
a0f42c21 | 2996 | return dw2_instantiate_symtab (dw2_get_cu (index)); |
9291a0cd TT |
2997 | } |
2998 | ||
7b9f3c50 DE |
2999 | /* Traversal function for dw2_forget_cached_source_info. */ |
3000 | ||
3001 | static int | |
3002 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3003 | { |
7b9f3c50 | 3004 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3005 | |
7b9f3c50 | 3006 | if (file_data->real_names) |
9291a0cd | 3007 | { |
7b9f3c50 | 3008 | int i; |
9291a0cd | 3009 | |
7b9f3c50 | 3010 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3011 | { |
7b9f3c50 DE |
3012 | xfree ((void*) file_data->real_names[i]); |
3013 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3014 | } |
3015 | } | |
7b9f3c50 DE |
3016 | |
3017 | return 1; | |
3018 | } | |
3019 | ||
3020 | static void | |
3021 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3022 | { | |
3023 | dw2_setup (objfile); | |
3024 | ||
3025 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3026 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3027 | } |
3028 | ||
f8eba3c6 TT |
3029 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3030 | the symtabs and calls the iterator. */ | |
3031 | ||
3032 | static int | |
3033 | dw2_map_expand_apply (struct objfile *objfile, | |
3034 | struct dwarf2_per_cu_data *per_cu, | |
3035 | const char *name, | |
3036 | const char *full_path, const char *real_path, | |
3037 | int (*callback) (struct symtab *, void *), | |
3038 | void *data) | |
3039 | { | |
3040 | struct symtab *last_made = objfile->symtabs; | |
3041 | ||
3042 | /* Don't visit already-expanded CUs. */ | |
3043 | if (per_cu->v.quick->symtab) | |
3044 | return 0; | |
3045 | ||
3046 | /* This may expand more than one symtab, and we want to iterate over | |
3047 | all of them. */ | |
a0f42c21 | 3048 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 TT |
3049 | |
3050 | return iterate_over_some_symtabs (name, full_path, real_path, callback, data, | |
3051 | objfile->symtabs, last_made); | |
3052 | } | |
3053 | ||
3054 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3055 | ||
9291a0cd | 3056 | static int |
f8eba3c6 TT |
3057 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
3058 | const char *full_path, const char *real_path, | |
3059 | int (*callback) (struct symtab *, void *), | |
3060 | void *data) | |
9291a0cd TT |
3061 | { |
3062 | int i; | |
c011a4f4 | 3063 | const char *name_basename = lbasename (name); |
4aac40c8 TT |
3064 | int name_len = strlen (name); |
3065 | int is_abs = IS_ABSOLUTE_PATH (name); | |
9291a0cd TT |
3066 | |
3067 | dw2_setup (objfile); | |
ae2de4f8 | 3068 | |
f4dc4d17 DE |
3069 | dw2_build_type_unit_groups (); |
3070 | ||
1fd400ff | 3071 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
f4dc4d17 | 3072 | + dwarf2_per_objfile->n_type_unit_groups); ++i) |
9291a0cd TT |
3073 | { |
3074 | int j; | |
f4dc4d17 | 3075 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3076 | struct quick_file_names *file_data; |
9291a0cd | 3077 | |
3d7bb9d9 | 3078 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3079 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3080 | continue; |
3081 | ||
7b9f3c50 DE |
3082 | file_data = dw2_get_file_names (objfile, per_cu); |
3083 | if (file_data == NULL) | |
9291a0cd TT |
3084 | continue; |
3085 | ||
7b9f3c50 | 3086 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3087 | { |
7b9f3c50 | 3088 | const char *this_name = file_data->file_names[j]; |
9291a0cd | 3089 | |
4aac40c8 TT |
3090 | if (FILENAME_CMP (name, this_name) == 0 |
3091 | || (!is_abs && compare_filenames_for_search (this_name, | |
3092 | name, name_len))) | |
9291a0cd | 3093 | { |
f8eba3c6 TT |
3094 | if (dw2_map_expand_apply (objfile, per_cu, |
3095 | name, full_path, real_path, | |
3096 | callback, data)) | |
3097 | return 1; | |
4aac40c8 | 3098 | } |
9291a0cd | 3099 | |
c011a4f4 DE |
3100 | /* Before we invoke realpath, which can get expensive when many |
3101 | files are involved, do a quick comparison of the basenames. */ | |
3102 | if (! basenames_may_differ | |
3103 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3104 | continue; | |
3105 | ||
9291a0cd TT |
3106 | if (full_path != NULL) |
3107 | { | |
7b9f3c50 DE |
3108 | const char *this_real_name = dw2_get_real_path (objfile, |
3109 | file_data, j); | |
9291a0cd | 3110 | |
7b9f3c50 | 3111 | if (this_real_name != NULL |
4aac40c8 TT |
3112 | && (FILENAME_CMP (full_path, this_real_name) == 0 |
3113 | || (!is_abs | |
3114 | && compare_filenames_for_search (this_real_name, | |
3115 | name, name_len)))) | |
9291a0cd | 3116 | { |
f8eba3c6 TT |
3117 | if (dw2_map_expand_apply (objfile, per_cu, |
3118 | name, full_path, real_path, | |
3119 | callback, data)) | |
3120 | return 1; | |
9291a0cd TT |
3121 | } |
3122 | } | |
3123 | ||
3124 | if (real_path != NULL) | |
3125 | { | |
7b9f3c50 DE |
3126 | const char *this_real_name = dw2_get_real_path (objfile, |
3127 | file_data, j); | |
9291a0cd | 3128 | |
7b9f3c50 | 3129 | if (this_real_name != NULL |
4aac40c8 TT |
3130 | && (FILENAME_CMP (real_path, this_real_name) == 0 |
3131 | || (!is_abs | |
3132 | && compare_filenames_for_search (this_real_name, | |
3133 | name, name_len)))) | |
9291a0cd | 3134 | { |
f8eba3c6 TT |
3135 | if (dw2_map_expand_apply (objfile, per_cu, |
3136 | name, full_path, real_path, | |
3137 | callback, data)) | |
3138 | return 1; | |
9291a0cd TT |
3139 | } |
3140 | } | |
3141 | } | |
3142 | } | |
3143 | ||
9291a0cd TT |
3144 | return 0; |
3145 | } | |
3146 | ||
3147 | static struct symtab * | |
3148 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3149 | const char *name, domain_enum domain) | |
3150 | { | |
774b6a14 | 3151 | /* We do all the work in the pre_expand_symtabs_matching hook |
9291a0cd TT |
3152 | instead. */ |
3153 | return NULL; | |
3154 | } | |
3155 | ||
3156 | /* A helper function that expands all symtabs that hold an object | |
156942c7 DE |
3157 | named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for |
3158 | symbols in block BLOCK_KIND. */ | |
2fdf6df6 | 3159 | |
9291a0cd | 3160 | static void |
156942c7 DE |
3161 | dw2_do_expand_symtabs_matching (struct objfile *objfile, |
3162 | int want_specific_block, | |
3163 | enum block_enum block_kind, | |
3164 | const char *name, domain_enum domain) | |
9291a0cd | 3165 | { |
156942c7 DE |
3166 | struct mapped_index *index; |
3167 | ||
9291a0cd TT |
3168 | dw2_setup (objfile); |
3169 | ||
156942c7 DE |
3170 | index = dwarf2_per_objfile->index_table; |
3171 | ||
ae2de4f8 | 3172 | /* index_table is NULL if OBJF_READNOW. */ |
156942c7 | 3173 | if (index) |
9291a0cd TT |
3174 | { |
3175 | offset_type *vec; | |
3176 | ||
156942c7 | 3177 | if (find_slot_in_mapped_hash (index, name, &vec)) |
9291a0cd TT |
3178 | { |
3179 | offset_type i, len = MAYBE_SWAP (*vec); | |
3180 | for (i = 0; i < len; ++i) | |
3181 | { | |
156942c7 DE |
3182 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[i + 1]); |
3183 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
e254ef6a | 3184 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index); |
156942c7 DE |
3185 | int want_static = block_kind != GLOBAL_BLOCK; |
3186 | /* This value is only valid for index versions >= 7. */ | |
3187 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3188 | gdb_index_symbol_kind symbol_kind = | |
3189 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
83a788b8 DE |
3190 | /* Only check the symbol attributes if they're present. |
3191 | Indices prior to version 7 don't record them, | |
3192 | and indices >= 7 may elide them for certain symbols | |
3193 | (gold does this). */ | |
3194 | int attrs_valid = | |
3195 | (index->version >= 7 | |
3196 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3197 | ||
3198 | if (attrs_valid | |
3199 | && want_specific_block | |
156942c7 DE |
3200 | && want_static != is_static) |
3201 | continue; | |
3202 | ||
83a788b8 DE |
3203 | /* Only check the symbol's kind if it has one. */ |
3204 | if (attrs_valid) | |
156942c7 DE |
3205 | { |
3206 | switch (domain) | |
3207 | { | |
3208 | case VAR_DOMAIN: | |
3209 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3210 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3211 | /* Some types are also in VAR_DOMAIN. */ | |
3212 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3213 | continue; | |
3214 | break; | |
3215 | case STRUCT_DOMAIN: | |
3216 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3217 | continue; | |
3218 | break; | |
3219 | case LABEL_DOMAIN: | |
3220 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3221 | continue; | |
3222 | break; | |
3223 | default: | |
3224 | break; | |
3225 | } | |
3226 | } | |
1fd400ff | 3227 | |
a0f42c21 | 3228 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3229 | } |
3230 | } | |
3231 | } | |
3232 | } | |
3233 | ||
774b6a14 TT |
3234 | static void |
3235 | dw2_pre_expand_symtabs_matching (struct objfile *objfile, | |
8903c50d | 3236 | enum block_enum block_kind, const char *name, |
774b6a14 | 3237 | domain_enum domain) |
9291a0cd | 3238 | { |
156942c7 | 3239 | dw2_do_expand_symtabs_matching (objfile, 1, block_kind, name, domain); |
9291a0cd TT |
3240 | } |
3241 | ||
3242 | static void | |
3243 | dw2_print_stats (struct objfile *objfile) | |
3244 | { | |
3245 | int i, count; | |
3246 | ||
3247 | dw2_setup (objfile); | |
3248 | count = 0; | |
1fd400ff | 3249 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3250 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3251 | { |
e254ef6a | 3252 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3253 | |
e254ef6a | 3254 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3255 | ++count; |
3256 | } | |
3257 | printf_filtered (_(" Number of unread CUs: %d\n"), count); | |
3258 | } | |
3259 | ||
3260 | static void | |
3261 | dw2_dump (struct objfile *objfile) | |
3262 | { | |
3263 | /* Nothing worth printing. */ | |
3264 | } | |
3265 | ||
3266 | static void | |
3267 | dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets, | |
3268 | struct section_offsets *delta) | |
3269 | { | |
3270 | /* There's nothing to relocate here. */ | |
3271 | } | |
3272 | ||
3273 | static void | |
3274 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3275 | const char *func_name) | |
3276 | { | |
156942c7 DE |
3277 | /* Note: It doesn't matter what we pass for block_kind here. */ |
3278 | dw2_do_expand_symtabs_matching (objfile, 0, GLOBAL_BLOCK, func_name, | |
3279 | VAR_DOMAIN); | |
9291a0cd TT |
3280 | } |
3281 | ||
3282 | static void | |
3283 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3284 | { | |
3285 | int i; | |
3286 | ||
3287 | dw2_setup (objfile); | |
1fd400ff TT |
3288 | |
3289 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3290 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3291 | { |
e254ef6a | 3292 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3293 | |
a0f42c21 | 3294 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3295 | } |
3296 | } | |
3297 | ||
3298 | static void | |
3299 | dw2_expand_symtabs_with_filename (struct objfile *objfile, | |
3300 | const char *filename) | |
3301 | { | |
3302 | int i; | |
3303 | ||
3304 | dw2_setup (objfile); | |
d4637a04 DE |
3305 | |
3306 | /* We don't need to consider type units here. | |
3307 | This is only called for examining code, e.g. expand_line_sal. | |
3308 | There can be an order of magnitude (or more) more type units | |
3309 | than comp units, and we avoid them if we can. */ | |
3310 | ||
3311 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3312 | { |
3313 | int j; | |
e254ef6a | 3314 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3315 | struct quick_file_names *file_data; |
9291a0cd | 3316 | |
3d7bb9d9 | 3317 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3318 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3319 | continue; |
3320 | ||
7b9f3c50 DE |
3321 | file_data = dw2_get_file_names (objfile, per_cu); |
3322 | if (file_data == NULL) | |
9291a0cd TT |
3323 | continue; |
3324 | ||
7b9f3c50 | 3325 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3326 | { |
7b9f3c50 | 3327 | const char *this_name = file_data->file_names[j]; |
1ef75ecc | 3328 | if (FILENAME_CMP (this_name, filename) == 0) |
9291a0cd | 3329 | { |
a0f42c21 | 3330 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3331 | break; |
3332 | } | |
3333 | } | |
3334 | } | |
3335 | } | |
3336 | ||
356d9f9d TT |
3337 | /* A helper function for dw2_find_symbol_file that finds the primary |
3338 | file name for a given CU. This is a die_reader_func. */ | |
3339 | ||
3340 | static void | |
3341 | dw2_get_primary_filename_reader (const struct die_reader_specs *reader, | |
3342 | gdb_byte *info_ptr, | |
3343 | struct die_info *comp_unit_die, | |
3344 | int has_children, | |
3345 | void *data) | |
3346 | { | |
3347 | const char **result_ptr = data; | |
3348 | struct dwarf2_cu *cu = reader->cu; | |
3349 | struct attribute *attr; | |
3350 | ||
3351 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
3352 | if (attr == NULL) | |
3353 | *result_ptr = NULL; | |
3354 | else | |
3355 | *result_ptr = DW_STRING (attr); | |
3356 | } | |
3357 | ||
dd786858 | 3358 | static const char * |
9291a0cd TT |
3359 | dw2_find_symbol_file (struct objfile *objfile, const char *name) |
3360 | { | |
e254ef6a | 3361 | struct dwarf2_per_cu_data *per_cu; |
9291a0cd | 3362 | offset_type *vec; |
356d9f9d | 3363 | const char *filename; |
9291a0cd TT |
3364 | |
3365 | dw2_setup (objfile); | |
3366 | ||
ae2de4f8 | 3367 | /* index_table is NULL if OBJF_READNOW. */ |
9291a0cd | 3368 | if (!dwarf2_per_objfile->index_table) |
96408a79 SA |
3369 | { |
3370 | struct symtab *s; | |
3371 | ||
d790cf0a DE |
3372 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
3373 | { | |
3374 | struct blockvector *bv = BLOCKVECTOR (s); | |
3375 | const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); | |
3376 | struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN); | |
3377 | ||
3378 | if (sym) | |
210bbc17 | 3379 | return SYMBOL_SYMTAB (sym)->filename; |
d790cf0a | 3380 | } |
96408a79 SA |
3381 | return NULL; |
3382 | } | |
9291a0cd TT |
3383 | |
3384 | if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table, | |
3385 | name, &vec)) | |
3386 | return NULL; | |
3387 | ||
3388 | /* Note that this just looks at the very first one named NAME -- but | |
3389 | actually we are looking for a function. find_main_filename | |
3390 | should be rewritten so that it doesn't require a custom hook. It | |
3391 | could just use the ordinary symbol tables. */ | |
3392 | /* vec[0] is the length, which must always be >0. */ | |
156942c7 | 3393 | per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1]))); |
9291a0cd | 3394 | |
356d9f9d TT |
3395 | if (per_cu->v.quick->symtab != NULL) |
3396 | return per_cu->v.quick->symtab->filename; | |
3397 | ||
f4dc4d17 DE |
3398 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, |
3399 | dw2_get_primary_filename_reader, &filename); | |
9291a0cd | 3400 | |
356d9f9d | 3401 | return filename; |
9291a0cd TT |
3402 | } |
3403 | ||
3404 | static void | |
40658b94 PH |
3405 | dw2_map_matching_symbols (const char * name, domain_enum namespace, |
3406 | struct objfile *objfile, int global, | |
3407 | int (*callback) (struct block *, | |
3408 | struct symbol *, void *), | |
2edb89d3 JK |
3409 | void *data, symbol_compare_ftype *match, |
3410 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3411 | { |
40658b94 | 3412 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3413 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3414 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3415 | } |
3416 | ||
3417 | static void | |
f8eba3c6 TT |
3418 | dw2_expand_symtabs_matching |
3419 | (struct objfile *objfile, | |
3420 | int (*file_matcher) (const char *, void *), | |
e078317b | 3421 | int (*name_matcher) (const char *, void *), |
f8eba3c6 TT |
3422 | enum search_domain kind, |
3423 | void *data) | |
9291a0cd TT |
3424 | { |
3425 | int i; | |
3426 | offset_type iter; | |
4b5246aa | 3427 | struct mapped_index *index; |
9291a0cd TT |
3428 | |
3429 | dw2_setup (objfile); | |
ae2de4f8 DE |
3430 | |
3431 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3432 | if (!dwarf2_per_objfile->index_table) |
3433 | return; | |
4b5246aa | 3434 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3435 | |
7b08b9eb | 3436 | if (file_matcher != NULL) |
24c79950 TT |
3437 | { |
3438 | struct cleanup *cleanup; | |
3439 | htab_t visited_found, visited_not_found; | |
3440 | ||
f4dc4d17 DE |
3441 | dw2_build_type_unit_groups (); |
3442 | ||
24c79950 TT |
3443 | visited_found = htab_create_alloc (10, |
3444 | htab_hash_pointer, htab_eq_pointer, | |
3445 | NULL, xcalloc, xfree); | |
3446 | cleanup = make_cleanup_htab_delete (visited_found); | |
3447 | visited_not_found = htab_create_alloc (10, | |
3448 | htab_hash_pointer, htab_eq_pointer, | |
3449 | NULL, xcalloc, xfree); | |
3450 | make_cleanup_htab_delete (visited_not_found); | |
3451 | ||
3452 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
f4dc4d17 | 3453 | + dwarf2_per_objfile->n_type_unit_groups); ++i) |
24c79950 TT |
3454 | { |
3455 | int j; | |
f4dc4d17 | 3456 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
24c79950 TT |
3457 | struct quick_file_names *file_data; |
3458 | void **slot; | |
7b08b9eb | 3459 | |
24c79950 | 3460 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3461 | |
24c79950 TT |
3462 | /* We only need to look at symtabs not already expanded. */ |
3463 | if (per_cu->v.quick->symtab) | |
3464 | continue; | |
7b08b9eb | 3465 | |
24c79950 TT |
3466 | file_data = dw2_get_file_names (objfile, per_cu); |
3467 | if (file_data == NULL) | |
3468 | continue; | |
7b08b9eb | 3469 | |
24c79950 TT |
3470 | if (htab_find (visited_not_found, file_data) != NULL) |
3471 | continue; | |
3472 | else if (htab_find (visited_found, file_data) != NULL) | |
3473 | { | |
3474 | per_cu->v.quick->mark = 1; | |
3475 | continue; | |
3476 | } | |
3477 | ||
3478 | for (j = 0; j < file_data->num_file_names; ++j) | |
3479 | { | |
3480 | if (file_matcher (file_data->file_names[j], data)) | |
3481 | { | |
3482 | per_cu->v.quick->mark = 1; | |
3483 | break; | |
3484 | } | |
3485 | } | |
3486 | ||
3487 | slot = htab_find_slot (per_cu->v.quick->mark | |
3488 | ? visited_found | |
3489 | : visited_not_found, | |
3490 | file_data, INSERT); | |
3491 | *slot = file_data; | |
3492 | } | |
3493 | ||
3494 | do_cleanups (cleanup); | |
3495 | } | |
9291a0cd | 3496 | |
3876f04e | 3497 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3498 | { |
3499 | offset_type idx = 2 * iter; | |
3500 | const char *name; | |
3501 | offset_type *vec, vec_len, vec_idx; | |
3502 | ||
3876f04e | 3503 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3504 | continue; |
3505 | ||
3876f04e | 3506 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3507 | |
e078317b | 3508 | if (! (*name_matcher) (name, data)) |
9291a0cd TT |
3509 | continue; |
3510 | ||
3511 | /* The name was matched, now expand corresponding CUs that were | |
3512 | marked. */ | |
4b5246aa | 3513 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3514 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3515 | vec_len = MAYBE_SWAP (vec[0]); |
3516 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3517 | { | |
e254ef6a | 3518 | struct dwarf2_per_cu_data *per_cu; |
156942c7 DE |
3519 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
3520 | gdb_index_symbol_kind symbol_kind = | |
3521 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3522 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3523 | ||
3524 | /* Don't crash on bad data. */ | |
3525 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
667e0a4b | 3526 | + dwarf2_per_objfile->n_type_units)) |
156942c7 | 3527 | continue; |
1fd400ff | 3528 | |
156942c7 DE |
3529 | /* Only check the symbol's kind if it has one. |
3530 | Indices prior to version 7 don't record it. */ | |
3531 | if (index->version >= 7) | |
3532 | { | |
3533 | switch (kind) | |
3534 | { | |
3535 | case VARIABLES_DOMAIN: | |
3536 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3537 | continue; | |
3538 | break; | |
3539 | case FUNCTIONS_DOMAIN: | |
3540 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3541 | continue; | |
3542 | break; | |
3543 | case TYPES_DOMAIN: | |
3544 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3545 | continue; | |
3546 | break; | |
3547 | default: | |
3548 | break; | |
3549 | } | |
3550 | } | |
3551 | ||
3552 | per_cu = dw2_get_cu (cu_index); | |
7b08b9eb | 3553 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3554 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3555 | } |
3556 | } | |
3557 | } | |
3558 | ||
9703b513 TT |
3559 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3560 | symtab. */ | |
3561 | ||
3562 | static struct symtab * | |
3563 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3564 | { | |
3565 | int i; | |
3566 | ||
3567 | if (BLOCKVECTOR (symtab) != NULL | |
3568 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3569 | return symtab; | |
3570 | ||
a3ec0bb1 DE |
3571 | if (symtab->includes == NULL) |
3572 | return NULL; | |
3573 | ||
9703b513 TT |
3574 | for (i = 0; symtab->includes[i]; ++i) |
3575 | { | |
a3ec0bb1 | 3576 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3577 | |
3578 | s = recursively_find_pc_sect_symtab (s, pc); | |
3579 | if (s != NULL) | |
3580 | return s; | |
3581 | } | |
3582 | ||
3583 | return NULL; | |
3584 | } | |
3585 | ||
9291a0cd TT |
3586 | static struct symtab * |
3587 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
3588 | struct minimal_symbol *msymbol, | |
3589 | CORE_ADDR pc, | |
3590 | struct obj_section *section, | |
3591 | int warn_if_readin) | |
3592 | { | |
3593 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3594 | struct symtab *result; |
9291a0cd TT |
3595 | |
3596 | dw2_setup (objfile); | |
3597 | ||
3598 | if (!objfile->psymtabs_addrmap) | |
3599 | return NULL; | |
3600 | ||
3601 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
3602 | if (!data) | |
3603 | return NULL; | |
3604 | ||
3605 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 3606 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
3607 | paddress (get_objfile_arch (objfile), pc)); |
3608 | ||
9703b513 TT |
3609 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
3610 | gdb_assert (result != NULL); | |
3611 | return result; | |
9291a0cd TT |
3612 | } |
3613 | ||
9291a0cd | 3614 | static void |
44b13c5a | 3615 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 3616 | void *data, int need_fullname) |
9291a0cd TT |
3617 | { |
3618 | int i; | |
24c79950 TT |
3619 | struct cleanup *cleanup; |
3620 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
3621 | NULL, xcalloc, xfree); | |
9291a0cd | 3622 | |
24c79950 | 3623 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 3624 | dw2_setup (objfile); |
ae2de4f8 | 3625 | |
f4dc4d17 DE |
3626 | dw2_build_type_unit_groups (); |
3627 | ||
24c79950 TT |
3628 | /* We can ignore file names coming from already-expanded CUs. */ |
3629 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3630 | + dwarf2_per_objfile->n_type_units); ++i) | |
3631 | { | |
3632 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
3633 | ||
3634 | if (per_cu->v.quick->symtab) | |
3635 | { | |
3636 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
3637 | INSERT); | |
3638 | ||
3639 | *slot = per_cu->v.quick->file_names; | |
3640 | } | |
3641 | } | |
3642 | ||
1fd400ff | 3643 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
f4dc4d17 | 3644 | + dwarf2_per_objfile->n_type_unit_groups); ++i) |
9291a0cd TT |
3645 | { |
3646 | int j; | |
f4dc4d17 | 3647 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3648 | struct quick_file_names *file_data; |
24c79950 | 3649 | void **slot; |
9291a0cd | 3650 | |
3d7bb9d9 | 3651 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3652 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3653 | continue; |
3654 | ||
7b9f3c50 DE |
3655 | file_data = dw2_get_file_names (objfile, per_cu); |
3656 | if (file_data == NULL) | |
9291a0cd TT |
3657 | continue; |
3658 | ||
24c79950 TT |
3659 | slot = htab_find_slot (visited, file_data, INSERT); |
3660 | if (*slot) | |
3661 | { | |
3662 | /* Already visited. */ | |
3663 | continue; | |
3664 | } | |
3665 | *slot = file_data; | |
3666 | ||
7b9f3c50 | 3667 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3668 | { |
74e2f255 DE |
3669 | const char *this_real_name; |
3670 | ||
3671 | if (need_fullname) | |
3672 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3673 | else | |
3674 | this_real_name = NULL; | |
7b9f3c50 | 3675 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
3676 | } |
3677 | } | |
24c79950 TT |
3678 | |
3679 | do_cleanups (cleanup); | |
9291a0cd TT |
3680 | } |
3681 | ||
3682 | static int | |
3683 | dw2_has_symbols (struct objfile *objfile) | |
3684 | { | |
3685 | return 1; | |
3686 | } | |
3687 | ||
3688 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
3689 | { | |
3690 | dw2_has_symbols, | |
3691 | dw2_find_last_source_symtab, | |
3692 | dw2_forget_cached_source_info, | |
f8eba3c6 | 3693 | dw2_map_symtabs_matching_filename, |
9291a0cd | 3694 | dw2_lookup_symbol, |
774b6a14 | 3695 | dw2_pre_expand_symtabs_matching, |
9291a0cd TT |
3696 | dw2_print_stats, |
3697 | dw2_dump, | |
3698 | dw2_relocate, | |
3699 | dw2_expand_symtabs_for_function, | |
3700 | dw2_expand_all_symtabs, | |
3701 | dw2_expand_symtabs_with_filename, | |
3702 | dw2_find_symbol_file, | |
40658b94 | 3703 | dw2_map_matching_symbols, |
9291a0cd TT |
3704 | dw2_expand_symtabs_matching, |
3705 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
3706 | dw2_map_symbol_filenames |
3707 | }; | |
3708 | ||
3709 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
3710 | file will use psymtabs, or 1 if using the GNU index. */ | |
3711 | ||
3712 | int | |
3713 | dwarf2_initialize_objfile (struct objfile *objfile) | |
3714 | { | |
3715 | /* If we're about to read full symbols, don't bother with the | |
3716 | indices. In this case we also don't care if some other debug | |
3717 | format is making psymtabs, because they are all about to be | |
3718 | expanded anyway. */ | |
3719 | if ((objfile->flags & OBJF_READNOW)) | |
3720 | { | |
3721 | int i; | |
3722 | ||
3723 | dwarf2_per_objfile->using_index = 1; | |
3724 | create_all_comp_units (objfile); | |
0e50663e | 3725 | create_all_type_units (objfile); |
7b9f3c50 DE |
3726 | dwarf2_per_objfile->quick_file_names_table = |
3727 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 3728 | |
1fd400ff | 3729 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3730 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3731 | { |
e254ef6a | 3732 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3733 | |
e254ef6a DE |
3734 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3735 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
3736 | } |
3737 | ||
3738 | /* Return 1 so that gdb sees the "quick" functions. However, | |
3739 | these functions will be no-ops because we will have expanded | |
3740 | all symtabs. */ | |
3741 | return 1; | |
3742 | } | |
3743 | ||
3744 | if (dwarf2_read_index (objfile)) | |
3745 | return 1; | |
3746 | ||
9291a0cd TT |
3747 | return 0; |
3748 | } | |
3749 | ||
3750 | \f | |
3751 | ||
dce234bc PP |
3752 | /* Build a partial symbol table. */ |
3753 | ||
3754 | void | |
f29dff0a | 3755 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 3756 | { |
f29dff0a | 3757 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
3758 | { |
3759 | init_psymbol_list (objfile, 1024); | |
3760 | } | |
3761 | ||
d146bf1e | 3762 | dwarf2_build_psymtabs_hard (objfile); |
c906108c | 3763 | } |
c906108c | 3764 | |
1ce1cefd DE |
3765 | /* Return the total length of the CU described by HEADER. */ |
3766 | ||
3767 | static unsigned int | |
3768 | get_cu_length (const struct comp_unit_head *header) | |
3769 | { | |
3770 | return header->initial_length_size + header->length; | |
3771 | } | |
3772 | ||
45452591 DE |
3773 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
3774 | ||
3775 | static inline int | |
b64f50a1 | 3776 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 3777 | { |
b64f50a1 | 3778 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 3779 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 3780 | |
b64f50a1 | 3781 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
3782 | } |
3783 | ||
3b80fe9b DE |
3784 | /* Find the base address of the compilation unit for range lists and |
3785 | location lists. It will normally be specified by DW_AT_low_pc. | |
3786 | In DWARF-3 draft 4, the base address could be overridden by | |
3787 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
3788 | compilation units with discontinuous ranges. */ | |
3789 | ||
3790 | static void | |
3791 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
3792 | { | |
3793 | struct attribute *attr; | |
3794 | ||
3795 | cu->base_known = 0; | |
3796 | cu->base_address = 0; | |
3797 | ||
3798 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
3799 | if (attr) | |
3800 | { | |
3801 | cu->base_address = DW_ADDR (attr); | |
3802 | cu->base_known = 1; | |
3803 | } | |
3804 | else | |
3805 | { | |
3806 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
3807 | if (attr) | |
3808 | { | |
3809 | cu->base_address = DW_ADDR (attr); | |
3810 | cu->base_known = 1; | |
3811 | } | |
3812 | } | |
3813 | } | |
3814 | ||
93311388 DE |
3815 | /* Read in the comp unit header information from the debug_info at info_ptr. |
3816 | NOTE: This leaves members offset, first_die_offset to be filled in | |
3817 | by the caller. */ | |
107d2387 | 3818 | |
fe1b8b76 | 3819 | static gdb_byte * |
107d2387 | 3820 | read_comp_unit_head (struct comp_unit_head *cu_header, |
fe1b8b76 | 3821 | gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
3822 | { |
3823 | int signed_addr; | |
891d2f0b | 3824 | unsigned int bytes_read; |
c764a876 DE |
3825 | |
3826 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
3827 | cu_header->initial_length_size = bytes_read; | |
3828 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 3829 | info_ptr += bytes_read; |
107d2387 AC |
3830 | cu_header->version = read_2_bytes (abfd, info_ptr); |
3831 | info_ptr += 2; | |
b64f50a1 JK |
3832 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
3833 | &bytes_read); | |
613e1657 | 3834 | info_ptr += bytes_read; |
107d2387 AC |
3835 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
3836 | info_ptr += 1; | |
3837 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
3838 | if (signed_addr < 0) | |
8e65ff28 | 3839 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 3840 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 3841 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 3842 | |
107d2387 AC |
3843 | return info_ptr; |
3844 | } | |
3845 | ||
36586728 TT |
3846 | /* Helper function that returns the proper abbrev section for |
3847 | THIS_CU. */ | |
3848 | ||
3849 | static struct dwarf2_section_info * | |
3850 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
3851 | { | |
3852 | struct dwarf2_section_info *abbrev; | |
3853 | ||
3854 | if (this_cu->is_dwz) | |
3855 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
3856 | else | |
3857 | abbrev = &dwarf2_per_objfile->abbrev; | |
3858 | ||
3859 | return abbrev; | |
3860 | } | |
3861 | ||
9ff913ba DE |
3862 | /* Subroutine of read_and_check_comp_unit_head and |
3863 | read_and_check_type_unit_head to simplify them. | |
3864 | Perform various error checking on the header. */ | |
3865 | ||
3866 | static void | |
3867 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
3868 | struct dwarf2_section_info *section, |
3869 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba DE |
3870 | { |
3871 | bfd *abfd = section->asection->owner; | |
3872 | const char *filename = bfd_get_filename (abfd); | |
3873 | ||
3874 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
3875 | error (_("Dwarf Error: wrong version in compilation unit header " | |
3876 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
3877 | filename); | |
3878 | ||
b64f50a1 | 3879 | if (header->abbrev_offset.sect_off |
36586728 | 3880 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
3881 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
3882 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 3883 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
3884 | filename); |
3885 | ||
3886 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
3887 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 3888 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
3889 | > section->size) |
3890 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
3891 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 3892 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
3893 | filename); |
3894 | } | |
3895 | ||
3896 | /* Read in a CU/TU header and perform some basic error checking. | |
3897 | The contents of the header are stored in HEADER. | |
3898 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 3899 | |
fe1b8b76 | 3900 | static gdb_byte * |
9ff913ba DE |
3901 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
3902 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 3903 | struct dwarf2_section_info *abbrev_section, |
9ff913ba DE |
3904 | gdb_byte *info_ptr, |
3905 | int is_debug_types_section) | |
72bf9492 | 3906 | { |
fe1b8b76 | 3907 | gdb_byte *beg_of_comp_unit = info_ptr; |
9ff913ba | 3908 | bfd *abfd = section->asection->owner; |
72bf9492 | 3909 | |
b64f50a1 | 3910 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 3911 | |
72bf9492 DJ |
3912 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
3913 | ||
460c1c54 CC |
3914 | /* If we're reading a type unit, skip over the signature and |
3915 | type_offset fields. */ | |
b0df02fd | 3916 | if (is_debug_types_section) |
460c1c54 CC |
3917 | info_ptr += 8 /*signature*/ + header->offset_size; |
3918 | ||
b64f50a1 | 3919 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 3920 | |
4bdcc0c1 | 3921 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
3922 | |
3923 | return info_ptr; | |
3924 | } | |
3925 | ||
348e048f DE |
3926 | /* Read in the types comp unit header information from .debug_types entry at |
3927 | types_ptr. The result is a pointer to one past the end of the header. */ | |
3928 | ||
3929 | static gdb_byte * | |
9ff913ba DE |
3930 | read_and_check_type_unit_head (struct comp_unit_head *header, |
3931 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 3932 | struct dwarf2_section_info *abbrev_section, |
9ff913ba | 3933 | gdb_byte *info_ptr, |
dee91e82 DE |
3934 | ULONGEST *signature, |
3935 | cu_offset *type_offset_in_tu) | |
348e048f | 3936 | { |
9ff913ba DE |
3937 | gdb_byte *beg_of_comp_unit = info_ptr; |
3938 | bfd *abfd = section->asection->owner; | |
348e048f | 3939 | |
b64f50a1 | 3940 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 3941 | |
9ff913ba | 3942 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 3943 | |
9ff913ba DE |
3944 | /* If we're reading a type unit, skip over the signature and |
3945 | type_offset fields. */ | |
3946 | if (signature != NULL) | |
3947 | *signature = read_8_bytes (abfd, info_ptr); | |
3948 | info_ptr += 8; | |
dee91e82 DE |
3949 | if (type_offset_in_tu != NULL) |
3950 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
3951 | header->offset_size); | |
9ff913ba DE |
3952 | info_ptr += header->offset_size; |
3953 | ||
b64f50a1 | 3954 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 3955 | |
4bdcc0c1 | 3956 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
3957 | |
3958 | return info_ptr; | |
348e048f DE |
3959 | } |
3960 | ||
f4dc4d17 DE |
3961 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
3962 | ||
3963 | static sect_offset | |
3964 | read_abbrev_offset (struct dwarf2_section_info *section, | |
3965 | sect_offset offset) | |
3966 | { | |
3967 | bfd *abfd = section->asection->owner; | |
3968 | gdb_byte *info_ptr; | |
3969 | unsigned int length, initial_length_size, offset_size; | |
3970 | sect_offset abbrev_offset; | |
3971 | ||
3972 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
3973 | info_ptr = section->buffer + offset.sect_off; | |
3974 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
3975 | offset_size = initial_length_size == 4 ? 4 : 8; | |
3976 | info_ptr += initial_length_size + 2 /*version*/; | |
3977 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
3978 | return abbrev_offset; | |
3979 | } | |
3980 | ||
aaa75496 JB |
3981 | /* Allocate a new partial symtab for file named NAME and mark this new |
3982 | partial symtab as being an include of PST. */ | |
3983 | ||
3984 | static void | |
3985 | dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst, | |
3986 | struct objfile *objfile) | |
3987 | { | |
3988 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
3989 | ||
3990 | subpst->section_offsets = pst->section_offsets; | |
3991 | subpst->textlow = 0; | |
3992 | subpst->texthigh = 0; | |
3993 | ||
3994 | subpst->dependencies = (struct partial_symtab **) | |
3995 | obstack_alloc (&objfile->objfile_obstack, | |
3996 | sizeof (struct partial_symtab *)); | |
3997 | subpst->dependencies[0] = pst; | |
3998 | subpst->number_of_dependencies = 1; | |
3999 | ||
4000 | subpst->globals_offset = 0; | |
4001 | subpst->n_global_syms = 0; | |
4002 | subpst->statics_offset = 0; | |
4003 | subpst->n_static_syms = 0; | |
4004 | subpst->symtab = NULL; | |
4005 | subpst->read_symtab = pst->read_symtab; | |
4006 | subpst->readin = 0; | |
4007 | ||
4008 | /* No private part is necessary for include psymtabs. This property | |
4009 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4010 | the regular ones. */ |
58a9656e | 4011 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4012 | } |
4013 | ||
4014 | /* Read the Line Number Program data and extract the list of files | |
4015 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4016 | partial symtab for each of these included files. */ |
aaa75496 JB |
4017 | |
4018 | static void | |
4019 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4020 | struct die_info *die, |
4021 | struct partial_symtab *pst) | |
aaa75496 | 4022 | { |
d85a05f0 DJ |
4023 | struct line_header *lh = NULL; |
4024 | struct attribute *attr; | |
aaa75496 | 4025 | |
d85a05f0 DJ |
4026 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4027 | if (attr) | |
3019eac3 | 4028 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4029 | if (lh == NULL) |
4030 | return; /* No linetable, so no includes. */ | |
4031 | ||
c6da4cef | 4032 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4033 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4034 | |
4035 | free_line_header (lh); | |
4036 | } | |
4037 | ||
348e048f | 4038 | static hashval_t |
52dc124a | 4039 | hash_signatured_type (const void *item) |
348e048f | 4040 | { |
52dc124a | 4041 | const struct signatured_type *sig_type = item; |
9a619af0 | 4042 | |
348e048f | 4043 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4044 | return sig_type->signature; |
348e048f DE |
4045 | } |
4046 | ||
4047 | static int | |
52dc124a | 4048 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4049 | { |
4050 | const struct signatured_type *lhs = item_lhs; | |
4051 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4052 | |
348e048f DE |
4053 | return lhs->signature == rhs->signature; |
4054 | } | |
4055 | ||
1fd400ff TT |
4056 | /* Allocate a hash table for signatured types. */ |
4057 | ||
4058 | static htab_t | |
673bfd45 | 4059 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4060 | { |
4061 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4062 | hash_signatured_type, |
4063 | eq_signatured_type, | |
1fd400ff TT |
4064 | NULL, |
4065 | &objfile->objfile_obstack, | |
4066 | hashtab_obstack_allocate, | |
4067 | dummy_obstack_deallocate); | |
4068 | } | |
4069 | ||
d467dd73 | 4070 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4071 | |
4072 | static int | |
d467dd73 | 4073 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4074 | { |
4075 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4076 | struct signatured_type ***datap = datum; |
1fd400ff | 4077 | |
b4dd5633 | 4078 | **datap = sigt; |
1fd400ff TT |
4079 | ++*datap; |
4080 | ||
4081 | return 1; | |
4082 | } | |
4083 | ||
3019eac3 | 4084 | /* Create the hash table of all entries in the .debug_types section. |
80626a55 DE |
4085 | DWO_FILE is a pointer to the DWO file for .debug_types.dwo, |
4086 | NULL otherwise. | |
4087 | Note: This function processes DWO files only, not DWP files. | |
3019eac3 DE |
4088 | The result is a pointer to the hash table or NULL if there are |
4089 | no types. */ | |
348e048f | 4090 | |
3019eac3 DE |
4091 | static htab_t |
4092 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4093 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4094 | { |
3019eac3 | 4095 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4096 | htab_t types_htab = NULL; |
8b70b953 TT |
4097 | int ix; |
4098 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4099 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4100 | |
3019eac3 DE |
4101 | if (VEC_empty (dwarf2_section_info_def, types)) |
4102 | return NULL; | |
348e048f | 4103 | |
4bdcc0c1 DE |
4104 | abbrev_section = (dwo_file != NULL |
4105 | ? &dwo_file->sections.abbrev | |
4106 | : &dwarf2_per_objfile->abbrev); | |
4107 | ||
09406207 DE |
4108 | if (dwarf2_read_debug) |
4109 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4110 | dwo_file ? ".dwo" : "", | |
4111 | bfd_get_filename (abbrev_section->asection->owner)); | |
4112 | ||
8b70b953 | 4113 | for (ix = 0; |
3019eac3 | 4114 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4115 | ++ix) |
4116 | { | |
3019eac3 | 4117 | bfd *abfd; |
8b70b953 | 4118 | gdb_byte *info_ptr, *end_ptr; |
36586728 | 4119 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4120 | |
8b70b953 TT |
4121 | dwarf2_read_section (objfile, section); |
4122 | info_ptr = section->buffer; | |
348e048f | 4123 | |
8b70b953 TT |
4124 | if (info_ptr == NULL) |
4125 | continue; | |
348e048f | 4126 | |
3019eac3 DE |
4127 | /* We can't set abfd until now because the section may be empty or |
4128 | not present, in which case section->asection will be NULL. */ | |
4129 | abfd = section->asection->owner; | |
4130 | ||
36586728 TT |
4131 | if (dwo_file) |
4132 | abbrev_section = &dwo_file->sections.abbrev; | |
4133 | else | |
4134 | abbrev_section = &dwarf2_per_objfile->abbrev; | |
4135 | ||
8b70b953 | 4136 | if (types_htab == NULL) |
3019eac3 DE |
4137 | { |
4138 | if (dwo_file) | |
4139 | types_htab = allocate_dwo_unit_table (objfile); | |
4140 | else | |
4141 | types_htab = allocate_signatured_type_table (objfile); | |
4142 | } | |
348e048f | 4143 | |
dee91e82 DE |
4144 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4145 | because we don't need to read any dies: the signature is in the | |
4146 | header. */ | |
8b70b953 TT |
4147 | |
4148 | end_ptr = info_ptr + section->size; | |
4149 | while (info_ptr < end_ptr) | |
4150 | { | |
b64f50a1 | 4151 | sect_offset offset; |
3019eac3 | 4152 | cu_offset type_offset_in_tu; |
8b70b953 | 4153 | ULONGEST signature; |
52dc124a | 4154 | struct signatured_type *sig_type; |
3019eac3 | 4155 | struct dwo_unit *dwo_tu; |
8b70b953 TT |
4156 | void **slot; |
4157 | gdb_byte *ptr = info_ptr; | |
9ff913ba | 4158 | struct comp_unit_head header; |
dee91e82 | 4159 | unsigned int length; |
348e048f | 4160 | |
b64f50a1 | 4161 | offset.sect_off = ptr - section->buffer; |
348e048f | 4162 | |
8b70b953 | 4163 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4164 | table, but we don't need anything else just yet. */ |
348e048f | 4165 | |
4bdcc0c1 DE |
4166 | ptr = read_and_check_type_unit_head (&header, section, |
4167 | abbrev_section, ptr, | |
3019eac3 | 4168 | &signature, &type_offset_in_tu); |
6caca83c | 4169 | |
1ce1cefd | 4170 | length = get_cu_length (&header); |
dee91e82 | 4171 | |
6caca83c | 4172 | /* Skip dummy type units. */ |
dee91e82 DE |
4173 | if (ptr >= info_ptr + length |
4174 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4175 | { |
1ce1cefd | 4176 | info_ptr += length; |
6caca83c CC |
4177 | continue; |
4178 | } | |
8b70b953 | 4179 | |
3019eac3 DE |
4180 | if (dwo_file) |
4181 | { | |
4182 | sig_type = NULL; | |
4183 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4184 | struct dwo_unit); | |
4185 | dwo_tu->dwo_file = dwo_file; | |
4186 | dwo_tu->signature = signature; | |
4187 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
4188 | dwo_tu->info_or_types_section = section; | |
4189 | dwo_tu->offset = offset; | |
4190 | dwo_tu->length = length; | |
4191 | } | |
4192 | else | |
4193 | { | |
4194 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4195 | The real type_offset is in the DWO file. */ | |
4196 | dwo_tu = NULL; | |
4197 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4198 | struct signatured_type); | |
4199 | sig_type->signature = signature; | |
4200 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4201 | sig_type->per_cu.objfile = objfile; | |
4202 | sig_type->per_cu.is_debug_types = 1; | |
4203 | sig_type->per_cu.info_or_types_section = section; | |
4204 | sig_type->per_cu.offset = offset; | |
4205 | sig_type->per_cu.length = length; | |
4206 | } | |
8b70b953 | 4207 | |
3019eac3 DE |
4208 | slot = htab_find_slot (types_htab, |
4209 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4210 | INSERT); | |
8b70b953 TT |
4211 | gdb_assert (slot != NULL); |
4212 | if (*slot != NULL) | |
4213 | { | |
3019eac3 DE |
4214 | sect_offset dup_offset; |
4215 | ||
4216 | if (dwo_file) | |
4217 | { | |
4218 | const struct dwo_unit *dup_tu = *slot; | |
4219 | ||
4220 | dup_offset = dup_tu->offset; | |
4221 | } | |
4222 | else | |
4223 | { | |
4224 | const struct signatured_type *dup_tu = *slot; | |
4225 | ||
4226 | dup_offset = dup_tu->per_cu.offset; | |
4227 | } | |
b3c8eb43 | 4228 | |
8b70b953 TT |
4229 | complaint (&symfile_complaints, |
4230 | _("debug type entry at offset 0x%x is duplicate to the " | |
4231 | "entry at offset 0x%x, signature 0x%s"), | |
3019eac3 | 4232 | offset.sect_off, dup_offset.sect_off, |
8b70b953 | 4233 | phex (signature, sizeof (signature))); |
8b70b953 | 4234 | } |
3019eac3 | 4235 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4236 | |
09406207 | 4237 | if (dwarf2_read_debug) |
8b70b953 | 4238 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n", |
b64f50a1 JK |
4239 | offset.sect_off, |
4240 | phex (signature, sizeof (signature))); | |
348e048f | 4241 | |
dee91e82 | 4242 | info_ptr += length; |
8b70b953 | 4243 | } |
348e048f DE |
4244 | } |
4245 | ||
3019eac3 DE |
4246 | return types_htab; |
4247 | } | |
4248 | ||
4249 | /* Create the hash table of all entries in the .debug_types section, | |
4250 | and initialize all_type_units. | |
4251 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4252 | otherwise non-zero. */ | |
4253 | ||
4254 | static int | |
4255 | create_all_type_units (struct objfile *objfile) | |
4256 | { | |
4257 | htab_t types_htab; | |
b4dd5633 | 4258 | struct signatured_type **iter; |
3019eac3 DE |
4259 | |
4260 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4261 | if (types_htab == NULL) | |
4262 | { | |
4263 | dwarf2_per_objfile->signatured_types = NULL; | |
4264 | return 0; | |
4265 | } | |
4266 | ||
348e048f DE |
4267 | dwarf2_per_objfile->signatured_types = types_htab; |
4268 | ||
d467dd73 DE |
4269 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4270 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 4271 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 4272 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 4273 | * sizeof (struct signatured_type *)); |
d467dd73 DE |
4274 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4275 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4276 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4277 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4278 | |
348e048f DE |
4279 | return 1; |
4280 | } | |
4281 | ||
380bca97 | 4282 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
e319fa28 | 4283 | Returns NULL if signature SIG is not present in the table. */ |
348e048f DE |
4284 | |
4285 | static struct signatured_type * | |
e319fa28 | 4286 | lookup_signatured_type (ULONGEST sig) |
348e048f DE |
4287 | { |
4288 | struct signatured_type find_entry, *entry; | |
4289 | ||
4290 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4291 | { | |
4292 | complaint (&symfile_complaints, | |
55f1336d | 4293 | _("missing `.debug_types' section for DW_FORM_ref_sig8 die")); |
dcc07052 | 4294 | return NULL; |
348e048f DE |
4295 | } |
4296 | ||
4297 | find_entry.signature = sig; | |
4298 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4299 | return entry; | |
4300 | } | |
42e7ad6c DE |
4301 | \f |
4302 | /* Low level DIE reading support. */ | |
348e048f | 4303 | |
d85a05f0 DJ |
4304 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4305 | ||
4306 | static void | |
4307 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4308 | struct dwarf2_cu *cu, |
3019eac3 DE |
4309 | struct dwarf2_section_info *section, |
4310 | struct dwo_file *dwo_file) | |
d85a05f0 | 4311 | { |
fceca515 | 4312 | gdb_assert (section->readin && section->buffer != NULL); |
dee91e82 | 4313 | reader->abfd = section->asection->owner; |
d85a05f0 | 4314 | reader->cu = cu; |
3019eac3 | 4315 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4316 | reader->die_section = section; |
4317 | reader->buffer = section->buffer; | |
f664829e | 4318 | reader->buffer_end = section->buffer + section->size; |
d85a05f0 DJ |
4319 | } |
4320 | ||
fd820528 | 4321 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 4322 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 4323 | |
f4dc4d17 DE |
4324 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
4325 | Otherwise the table specified in the comp unit header is read in and used. | |
4326 | This is an optimization for when we already have the abbrev table. | |
4327 | ||
dee91e82 DE |
4328 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
4329 | Otherwise, a new CU is allocated with xmalloc. | |
4330 | ||
4331 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
4332 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
4333 | ||
4334 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 4335 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 4336 | |
70221824 | 4337 | static void |
fd820528 | 4338 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 4339 | struct abbrev_table *abbrev_table, |
fd820528 DE |
4340 | int use_existing_cu, int keep, |
4341 | die_reader_func_ftype *die_reader_func, | |
4342 | void *data) | |
c906108c | 4343 | { |
dee91e82 | 4344 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 DE |
4345 | struct dwarf2_section_info *section = this_cu->info_or_types_section; |
4346 | bfd *abfd = section->asection->owner; | |
dee91e82 DE |
4347 | struct dwarf2_cu *cu; |
4348 | gdb_byte *begin_info_ptr, *info_ptr; | |
4349 | struct die_reader_specs reader; | |
d85a05f0 | 4350 | struct die_info *comp_unit_die; |
dee91e82 | 4351 | int has_children; |
d85a05f0 | 4352 | struct attribute *attr; |
dee91e82 DE |
4353 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
4354 | struct signatured_type *sig_type = NULL; | |
4bdcc0c1 | 4355 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
4356 | /* Non-zero if CU currently points to a DWO file and we need to |
4357 | reread it. When this happens we need to reread the skeleton die | |
4358 | before we can reread the DWO file. */ | |
4359 | int rereading_dwo_cu = 0; | |
c906108c | 4360 | |
09406207 DE |
4361 | if (dwarf2_die_debug) |
4362 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4363 | this_cu->is_debug_types ? "type" : "comp", | |
4364 | this_cu->offset.sect_off); | |
4365 | ||
dee91e82 DE |
4366 | if (use_existing_cu) |
4367 | gdb_assert (keep); | |
23745b47 | 4368 | |
dee91e82 DE |
4369 | cleanups = make_cleanup (null_cleanup, NULL); |
4370 | ||
4371 | /* This is cheap if the section is already read in. */ | |
4372 | dwarf2_read_section (objfile, section); | |
4373 | ||
4374 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
4375 | |
4376 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
4377 | |
4378 | if (use_existing_cu && this_cu->cu != NULL) | |
4379 | { | |
4380 | cu = this_cu->cu; | |
42e7ad6c DE |
4381 | |
4382 | /* If this CU is from a DWO file we need to start over, we need to | |
4383 | refetch the attributes from the skeleton CU. | |
4384 | This could be optimized by retrieving those attributes from when we | |
4385 | were here the first time: the previous comp_unit_die was stored in | |
4386 | comp_unit_obstack. But there's no data yet that we need this | |
4387 | optimization. */ | |
4388 | if (cu->dwo_unit != NULL) | |
4389 | rereading_dwo_cu = 1; | |
dee91e82 DE |
4390 | } |
4391 | else | |
4392 | { | |
4393 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
4394 | gdb_assert (this_cu->cu == NULL); | |
4395 | ||
4396 | cu = xmalloc (sizeof (*cu)); | |
4397 | init_one_comp_unit (cu, this_cu); | |
4398 | ||
4399 | /* If an error occurs while loading, release our storage. */ | |
4400 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
42e7ad6c | 4401 | } |
dee91e82 | 4402 | |
42e7ad6c DE |
4403 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
4404 | { | |
4405 | /* We already have the header, there's no need to read it in again. */ | |
4406 | info_ptr += cu->header.first_die_offset.cu_off; | |
4407 | } | |
4408 | else | |
4409 | { | |
3019eac3 | 4410 | if (this_cu->is_debug_types) |
dee91e82 DE |
4411 | { |
4412 | ULONGEST signature; | |
42e7ad6c | 4413 | cu_offset type_offset_in_tu; |
dee91e82 | 4414 | |
4bdcc0c1 DE |
4415 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
4416 | abbrev_section, info_ptr, | |
42e7ad6c DE |
4417 | &signature, |
4418 | &type_offset_in_tu); | |
dee91e82 | 4419 | |
42e7ad6c DE |
4420 | /* Since per_cu is the first member of struct signatured_type, |
4421 | we can go from a pointer to one to a pointer to the other. */ | |
4422 | sig_type = (struct signatured_type *) this_cu; | |
4423 | gdb_assert (sig_type->signature == signature); | |
4424 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
4425 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
4426 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
4427 | ||
42e7ad6c DE |
4428 | /* LENGTH has not been set yet for type units if we're |
4429 | using .gdb_index. */ | |
1ce1cefd | 4430 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
4431 | |
4432 | /* Establish the type offset that can be used to lookup the type. */ | |
4433 | sig_type->type_offset_in_section.sect_off = | |
4434 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
4435 | } |
4436 | else | |
4437 | { | |
4bdcc0c1 DE |
4438 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4439 | abbrev_section, | |
4440 | info_ptr, 0); | |
dee91e82 DE |
4441 | |
4442 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 4443 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
4444 | } |
4445 | } | |
10b3939b | 4446 | |
6caca83c | 4447 | /* Skip dummy compilation units. */ |
dee91e82 | 4448 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
4449 | || peek_abbrev_code (abfd, info_ptr) == 0) |
4450 | { | |
dee91e82 | 4451 | do_cleanups (cleanups); |
21b2bd31 | 4452 | return; |
6caca83c CC |
4453 | } |
4454 | ||
433df2d4 DE |
4455 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
4456 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
4457 | done. Note that it's important that if the CU had an abbrev table |
4458 | on entry we don't free it when we're done: Somewhere up the call stack | |
4459 | it may be in use. */ | |
f4dc4d17 DE |
4460 | if (abbrev_table != NULL) |
4461 | { | |
4462 | gdb_assert (cu->abbrev_table == NULL); | |
4463 | gdb_assert (cu->header.abbrev_offset.sect_off | |
4464 | == abbrev_table->offset.sect_off); | |
4465 | cu->abbrev_table = abbrev_table; | |
4466 | } | |
4467 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 4468 | { |
4bdcc0c1 | 4469 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
4470 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4471 | } | |
42e7ad6c DE |
4472 | else if (rereading_dwo_cu) |
4473 | { | |
4474 | dwarf2_free_abbrev_table (cu); | |
4475 | dwarf2_read_abbrevs (cu, abbrev_section); | |
4476 | } | |
af703f96 | 4477 | |
dee91e82 | 4478 | /* Read the top level CU/TU die. */ |
3019eac3 | 4479 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 4480 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 4481 | |
3019eac3 DE |
4482 | /* If we have a DWO stub, process it and then read in the DWO file. |
4483 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains | |
4484 | a DWO CU, that this test will fail. */ | |
4485 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
4486 | if (attr) | |
4487 | { | |
4488 | char *dwo_name = DW_STRING (attr); | |
42e7ad6c | 4489 | const char *comp_dir_string; |
3019eac3 DE |
4490 | struct dwo_unit *dwo_unit; |
4491 | ULONGEST signature; /* Or dwo_id. */ | |
42e7ad6c | 4492 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
3019eac3 | 4493 | int i,num_extra_attrs; |
4bdcc0c1 | 4494 | struct dwarf2_section_info *dwo_abbrev_section; |
3019eac3 DE |
4495 | |
4496 | if (has_children) | |
4497 | error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name" | |
4498 | " has children (offset 0x%x) [in module %s]"), | |
4499 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
4500 | ||
4501 | /* These attributes aren't processed until later: | |
4502 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
4503 | However, the attribute is found in the stub which we won't have later. | |
4504 | In order to not impose this complication on the rest of the code, | |
4505 | we read them here and copy them to the DWO CU/TU die. */ | |
3019eac3 DE |
4506 | |
4507 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
4508 | DWO file. */ | |
42e7ad6c | 4509 | stmt_list = NULL; |
3019eac3 DE |
4510 | if (! this_cu->is_debug_types) |
4511 | stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
4512 | low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu); | |
4513 | high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu); | |
4514 | ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu); | |
42e7ad6c | 4515 | comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); |
3019eac3 DE |
4516 | |
4517 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
4518 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
4519 | cu->addr_base = 0; | |
3019eac3 DE |
4520 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu); |
4521 | if (attr) | |
2e3cf129 DE |
4522 | cu->addr_base = DW_UNSND (attr); |
4523 | ||
4524 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
4525 | We need the value before we can process DW_AT_ranges. */ | |
4526 | cu->ranges_base = 0; | |
4527 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
4528 | if (attr) | |
4529 | cu->ranges_base = DW_UNSND (attr); | |
3019eac3 DE |
4530 | |
4531 | if (this_cu->is_debug_types) | |
4532 | { | |
4533 | gdb_assert (sig_type != NULL); | |
4534 | signature = sig_type->signature; | |
4535 | } | |
4536 | else | |
4537 | { | |
4538 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
4539 | if (! attr) | |
4540 | error (_("Dwarf Error: missing dwo_id [in module %s]"), | |
4541 | dwo_name); | |
4542 | signature = DW_UNSND (attr); | |
4543 | } | |
4544 | ||
4545 | /* We may need the comp_dir in order to find the DWO file. */ | |
42e7ad6c DE |
4546 | comp_dir_string = NULL; |
4547 | if (comp_dir) | |
4548 | comp_dir_string = DW_STRING (comp_dir); | |
3019eac3 DE |
4549 | |
4550 | if (this_cu->is_debug_types) | |
42e7ad6c | 4551 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string); |
3019eac3 | 4552 | else |
42e7ad6c | 4553 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string, |
3019eac3 DE |
4554 | signature); |
4555 | ||
4556 | if (dwo_unit == NULL) | |
4557 | { | |
4558 | error (_("Dwarf Error: CU at offset 0x%x references unknown DWO" | |
4559 | " with ID %s [in module %s]"), | |
4560 | this_cu->offset.sect_off, | |
4561 | phex (signature, sizeof (signature)), | |
4562 | objfile->name); | |
4563 | } | |
4564 | ||
4565 | /* Set up for reading the DWO CU/TU. */ | |
4566 | cu->dwo_unit = dwo_unit; | |
4567 | section = dwo_unit->info_or_types_section; | |
80626a55 | 4568 | dwarf2_read_section (objfile, section); |
3019eac3 | 4569 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
4bdcc0c1 | 4570 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
3019eac3 DE |
4571 | init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file); |
4572 | ||
4573 | if (this_cu->is_debug_types) | |
4574 | { | |
4575 | ULONGEST signature; | |
80626a55 | 4576 | cu_offset type_offset_in_tu; |
3019eac3 | 4577 | |
4bdcc0c1 DE |
4578 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
4579 | dwo_abbrev_section, | |
4580 | info_ptr, | |
80626a55 DE |
4581 | &signature, |
4582 | &type_offset_in_tu); | |
3019eac3 DE |
4583 | gdb_assert (sig_type->signature == signature); |
4584 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
80626a55 DE |
4585 | /* For DWOs coming from DWP files, we don't know the CU length |
4586 | nor the type's offset in the TU until now. */ | |
4587 | dwo_unit->length = get_cu_length (&cu->header); | |
4588 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
3019eac3 DE |
4589 | |
4590 | /* Establish the type offset that can be used to lookup the type. | |
4591 | For DWO files, we don't know it until now. */ | |
4592 | sig_type->type_offset_in_section.sect_off = | |
4593 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
4594 | } | |
4595 | else | |
4596 | { | |
4bdcc0c1 DE |
4597 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4598 | dwo_abbrev_section, | |
4599 | info_ptr, 0); | |
3019eac3 | 4600 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
80626a55 DE |
4601 | /* For DWOs coming from DWP files, we don't know the CU length |
4602 | until now. */ | |
4603 | dwo_unit->length = get_cu_length (&cu->header); | |
3019eac3 DE |
4604 | } |
4605 | ||
4606 | /* Discard the original CU's abbrev table, and read the DWO's. */ | |
f4dc4d17 DE |
4607 | if (abbrev_table == NULL) |
4608 | { | |
4609 | dwarf2_free_abbrev_table (cu); | |
4610 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
4611 | } | |
4612 | else | |
4613 | { | |
4614 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
4615 | make_cleanup (dwarf2_free_abbrev_table, cu); | |
4616 | } | |
3019eac3 DE |
4617 | |
4618 | /* Read in the die, but leave space to copy over the attributes | |
4619 | from the stub. This has the benefit of simplifying the rest of | |
4620 | the code - all the real work is done here. */ | |
4621 | num_extra_attrs = ((stmt_list != NULL) | |
4622 | + (low_pc != NULL) | |
4623 | + (high_pc != NULL) | |
42e7ad6c DE |
4624 | + (ranges != NULL) |
4625 | + (comp_dir != NULL)); | |
3019eac3 DE |
4626 | info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr, |
4627 | &has_children, num_extra_attrs); | |
4628 | ||
4629 | /* Copy over the attributes from the stub to the DWO die. */ | |
4630 | i = comp_unit_die->num_attrs; | |
4631 | if (stmt_list != NULL) | |
4632 | comp_unit_die->attrs[i++] = *stmt_list; | |
4633 | if (low_pc != NULL) | |
4634 | comp_unit_die->attrs[i++] = *low_pc; | |
4635 | if (high_pc != NULL) | |
4636 | comp_unit_die->attrs[i++] = *high_pc; | |
4637 | if (ranges != NULL) | |
4638 | comp_unit_die->attrs[i++] = *ranges; | |
42e7ad6c DE |
4639 | if (comp_dir != NULL) |
4640 | comp_unit_die->attrs[i++] = *comp_dir; | |
3019eac3 DE |
4641 | comp_unit_die->num_attrs += num_extra_attrs; |
4642 | ||
4643 | /* Skip dummy compilation units. */ | |
4644 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
4645 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
4646 | { | |
4647 | do_cleanups (cleanups); | |
4648 | return; | |
4649 | } | |
4650 | } | |
4651 | ||
dee91e82 DE |
4652 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
4653 | ||
4654 | if (free_cu_cleanup != NULL) | |
348e048f | 4655 | { |
dee91e82 DE |
4656 | if (keep) |
4657 | { | |
4658 | /* We've successfully allocated this compilation unit. Let our | |
4659 | caller clean it up when finished with it. */ | |
4660 | discard_cleanups (free_cu_cleanup); | |
4661 | ||
4662 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
4663 | So we have to manually free the abbrev table. */ | |
4664 | dwarf2_free_abbrev_table (cu); | |
4665 | ||
4666 | /* Link this CU into read_in_chain. */ | |
4667 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
4668 | dwarf2_per_objfile->read_in_chain = this_cu; | |
4669 | } | |
4670 | else | |
4671 | do_cleanups (free_cu_cleanup); | |
348e048f | 4672 | } |
dee91e82 DE |
4673 | |
4674 | do_cleanups (cleanups); | |
4675 | } | |
4676 | ||
3019eac3 DE |
4677 | /* Read CU/TU THIS_CU in section SECTION, |
4678 | but do not follow DW_AT_GNU_dwo_name if present. | |
80626a55 DE |
4679 | DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed |
4680 | to have already done the lookup to find the DWO/DWP file). | |
dee91e82 DE |
4681 | |
4682 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 4683 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
4684 | |
4685 | We fill in THIS_CU->length. | |
4686 | ||
4687 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
4688 | linker) then DIE_READER_FUNC will not get called. | |
4689 | ||
4690 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4691 | This is done in order to not leave THIS_CU->cu in a state where we have |
4692 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
4693 | |
4694 | static void | |
4695 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
4696 | struct dwarf2_section_info *abbrev_section, | |
3019eac3 | 4697 | struct dwo_file *dwo_file, |
dee91e82 DE |
4698 | die_reader_func_ftype *die_reader_func, |
4699 | void *data) | |
4700 | { | |
4701 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3019eac3 DE |
4702 | struct dwarf2_section_info *section = this_cu->info_or_types_section; |
4703 | bfd *abfd = section->asection->owner; | |
dee91e82 DE |
4704 | struct dwarf2_cu cu; |
4705 | gdb_byte *begin_info_ptr, *info_ptr; | |
4706 | struct die_reader_specs reader; | |
4707 | struct cleanup *cleanups; | |
4708 | struct die_info *comp_unit_die; | |
4709 | int has_children; | |
4710 | ||
09406207 DE |
4711 | if (dwarf2_die_debug) |
4712 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4713 | this_cu->is_debug_types ? "type" : "comp", | |
4714 | this_cu->offset.sect_off); | |
4715 | ||
dee91e82 DE |
4716 | gdb_assert (this_cu->cu == NULL); |
4717 | ||
dee91e82 DE |
4718 | /* This is cheap if the section is already read in. */ |
4719 | dwarf2_read_section (objfile, section); | |
4720 | ||
4721 | init_one_comp_unit (&cu, this_cu); | |
4722 | ||
4723 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
4724 | ||
4725 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
4726 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
4727 | abbrev_section, info_ptr, | |
3019eac3 | 4728 | this_cu->is_debug_types); |
dee91e82 | 4729 | |
1ce1cefd | 4730 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
4731 | |
4732 | /* Skip dummy compilation units. */ | |
4733 | if (info_ptr >= begin_info_ptr + this_cu->length | |
4734 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 4735 | { |
dee91e82 | 4736 | do_cleanups (cleanups); |
21b2bd31 | 4737 | return; |
93311388 | 4738 | } |
72bf9492 | 4739 | |
dee91e82 DE |
4740 | dwarf2_read_abbrevs (&cu, abbrev_section); |
4741 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
4742 | ||
3019eac3 | 4743 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
4744 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
4745 | ||
4746 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
4747 | ||
4748 | do_cleanups (cleanups); | |
4749 | } | |
4750 | ||
3019eac3 DE |
4751 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
4752 | does not lookup the specified DWO file. | |
4753 | This cannot be used to read DWO files. | |
dee91e82 DE |
4754 | |
4755 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4756 | This is done in order to not leave THIS_CU->cu in a state where we have |
4757 | to care whether it refers to the "main" CU or the DWO CU. | |
4758 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
4759 | |
4760 | static void | |
4761 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
4762 | die_reader_func_ftype *die_reader_func, | |
4763 | void *data) | |
4764 | { | |
4765 | init_cutu_and_read_dies_no_follow (this_cu, | |
36586728 | 4766 | get_abbrev_section_for_cu (this_cu), |
3019eac3 | 4767 | NULL, |
dee91e82 DE |
4768 | die_reader_func, data); |
4769 | } | |
4770 | ||
f4dc4d17 DE |
4771 | /* Create a psymtab named NAME and assign it to PER_CU. |
4772 | ||
4773 | The caller must fill in the following details: | |
4774 | dirname, textlow, texthigh. */ | |
4775 | ||
4776 | static struct partial_symtab * | |
4777 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
4778 | { | |
4779 | struct objfile *objfile = per_cu->objfile; | |
4780 | struct partial_symtab *pst; | |
4781 | ||
4782 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
4783 | name, 0, | |
4784 | objfile->global_psymbols.next, | |
4785 | objfile->static_psymbols.next); | |
4786 | ||
4787 | pst->psymtabs_addrmap_supported = 1; | |
4788 | ||
4789 | /* This is the glue that links PST into GDB's symbol API. */ | |
4790 | pst->read_symtab_private = per_cu; | |
4791 | pst->read_symtab = dwarf2_psymtab_to_symtab; | |
4792 | per_cu->v.psymtab = pst; | |
4793 | ||
4794 | return pst; | |
4795 | } | |
4796 | ||
dee91e82 DE |
4797 | /* die_reader_func for process_psymtab_comp_unit. */ |
4798 | ||
4799 | static void | |
4800 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
4801 | gdb_byte *info_ptr, | |
4802 | struct die_info *comp_unit_die, | |
4803 | int has_children, | |
4804 | void *data) | |
4805 | { | |
4806 | struct dwarf2_cu *cu = reader->cu; | |
4807 | struct objfile *objfile = cu->objfile; | |
4808 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
dee91e82 DE |
4809 | struct attribute *attr; |
4810 | CORE_ADDR baseaddr; | |
4811 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
4812 | struct partial_symtab *pst; | |
4813 | int has_pc_info; | |
4814 | const char *filename; | |
95554aad | 4815 | int *want_partial_unit_ptr = data; |
dee91e82 | 4816 | |
95554aad TT |
4817 | if (comp_unit_die->tag == DW_TAG_partial_unit |
4818 | && (want_partial_unit_ptr == NULL | |
4819 | || !*want_partial_unit_ptr)) | |
dee91e82 DE |
4820 | return; |
4821 | ||
f4dc4d17 DE |
4822 | gdb_assert (! per_cu->is_debug_types); |
4823 | ||
95554aad | 4824 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
dee91e82 DE |
4825 | |
4826 | cu->list_in_scope = &file_symbols; | |
c906108c | 4827 | |
93311388 | 4828 | /* Allocate a new partial symbol table structure. */ |
dee91e82 | 4829 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); |
3e2a0cee TT |
4830 | if (attr == NULL || !DW_STRING (attr)) |
4831 | filename = ""; | |
4832 | else | |
4833 | filename = DW_STRING (attr); | |
72bf9492 | 4834 | |
f4dc4d17 DE |
4835 | pst = create_partial_symtab (per_cu, filename); |
4836 | ||
4837 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
dee91e82 | 4838 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); |
d85a05f0 DJ |
4839 | if (attr != NULL) |
4840 | pst->dirname = DW_STRING (attr); | |
72bf9492 | 4841 | |
93311388 | 4842 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
e7c27a73 | 4843 | |
dee91e82 | 4844 | dwarf2_find_base_address (comp_unit_die, cu); |
d85a05f0 | 4845 | |
93311388 DE |
4846 | /* Possibly set the default values of LOWPC and HIGHPC from |
4847 | `DW_AT_ranges'. */ | |
d85a05f0 | 4848 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
dee91e82 | 4849 | &best_highpc, cu, pst); |
d85a05f0 | 4850 | if (has_pc_info == 1 && best_lowpc < best_highpc) |
93311388 DE |
4851 | /* Store the contiguous range if it is not empty; it can be empty for |
4852 | CUs with no code. */ | |
4853 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
d85a05f0 DJ |
4854 | best_lowpc + baseaddr, |
4855 | best_highpc + baseaddr - 1, pst); | |
93311388 DE |
4856 | |
4857 | /* Check if comp unit has_children. | |
4858 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 4859 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 4860 | if (has_children) |
93311388 DE |
4861 | { |
4862 | struct partial_die_info *first_die; | |
4863 | CORE_ADDR lowpc, highpc; | |
31ffec48 | 4864 | |
93311388 DE |
4865 | lowpc = ((CORE_ADDR) -1); |
4866 | highpc = ((CORE_ADDR) 0); | |
c906108c | 4867 | |
dee91e82 | 4868 | first_die = load_partial_dies (reader, info_ptr, 1); |
c906108c | 4869 | |
93311388 | 4870 | scan_partial_symbols (first_die, &lowpc, &highpc, |
dee91e82 | 4871 | ! has_pc_info, cu); |
57c22c6c | 4872 | |
93311388 DE |
4873 | /* If we didn't find a lowpc, set it to highpc to avoid |
4874 | complaints from `maint check'. */ | |
4875 | if (lowpc == ((CORE_ADDR) -1)) | |
4876 | lowpc = highpc; | |
10b3939b | 4877 | |
93311388 DE |
4878 | /* If the compilation unit didn't have an explicit address range, |
4879 | then use the information extracted from its child dies. */ | |
d85a05f0 | 4880 | if (! has_pc_info) |
93311388 | 4881 | { |
d85a05f0 DJ |
4882 | best_lowpc = lowpc; |
4883 | best_highpc = highpc; | |
93311388 DE |
4884 | } |
4885 | } | |
d85a05f0 DJ |
4886 | pst->textlow = best_lowpc + baseaddr; |
4887 | pst->texthigh = best_highpc + baseaddr; | |
c906108c | 4888 | |
93311388 DE |
4889 | pst->n_global_syms = objfile->global_psymbols.next - |
4890 | (objfile->global_psymbols.list + pst->globals_offset); | |
4891 | pst->n_static_syms = objfile->static_psymbols.next - | |
4892 | (objfile->static_psymbols.list + pst->statics_offset); | |
4893 | sort_pst_symbols (pst); | |
c906108c | 4894 | |
f4dc4d17 | 4895 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs)) |
95554aad TT |
4896 | { |
4897 | int i; | |
f4dc4d17 | 4898 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs); |
95554aad TT |
4899 | struct dwarf2_per_cu_data *iter; |
4900 | ||
4901 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
4902 | post-pass. */ | |
4903 | pst->number_of_dependencies = len; | |
4904 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
4905 | len * sizeof (struct symtab *)); | |
4906 | for (i = 0; | |
f4dc4d17 | 4907 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs, |
95554aad TT |
4908 | i, iter); |
4909 | ++i) | |
4910 | pst->dependencies[i] = iter->v.psymtab; | |
4911 | ||
f4dc4d17 | 4912 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs); |
95554aad TT |
4913 | } |
4914 | ||
f4dc4d17 DE |
4915 | /* Get the list of files included in the current compilation unit, |
4916 | and build a psymtab for each of them. */ | |
4917 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
09406207 DE |
4918 | |
4919 | if (dwarf2_read_debug) | |
4920 | { | |
4921 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
4922 | ||
4923 | fprintf_unfiltered (gdb_stdlog, | |
844226d6 | 4924 | "Psymtab for %s unit @0x%x: %s - %s" |
09406207 DE |
4925 | ", %d global, %d static syms\n", |
4926 | per_cu->is_debug_types ? "type" : "comp", | |
4927 | per_cu->offset.sect_off, | |
4928 | paddress (gdbarch, pst->textlow), | |
4929 | paddress (gdbarch, pst->texthigh), | |
4930 | pst->n_global_syms, pst->n_static_syms); | |
4931 | } | |
dee91e82 | 4932 | } |
ae038cb0 | 4933 | |
dee91e82 DE |
4934 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. |
4935 | Process compilation unit THIS_CU for a psymtab. */ | |
4936 | ||
4937 | static void | |
95554aad TT |
4938 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, |
4939 | int want_partial_unit) | |
dee91e82 DE |
4940 | { |
4941 | /* If this compilation unit was already read in, free the | |
4942 | cached copy in order to read it in again. This is | |
4943 | necessary because we skipped some symbols when we first | |
4944 | read in the compilation unit (see load_partial_dies). | |
4945 | This problem could be avoided, but the benefit is unclear. */ | |
4946 | if (this_cu->cu != NULL) | |
4947 | free_one_cached_comp_unit (this_cu); | |
4948 | ||
3019eac3 | 4949 | gdb_assert (! this_cu->is_debug_types); |
f4dc4d17 DE |
4950 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
4951 | process_psymtab_comp_unit_reader, | |
95554aad | 4952 | &want_partial_unit); |
dee91e82 DE |
4953 | |
4954 | /* Age out any secondary CUs. */ | |
4955 | age_cached_comp_units (); | |
93311388 | 4956 | } |
ff013f42 | 4957 | |
f4dc4d17 DE |
4958 | static hashval_t |
4959 | hash_type_unit_group (const void *item) | |
4960 | { | |
094b34ac | 4961 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 4962 | |
094b34ac | 4963 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 4964 | } |
348e048f DE |
4965 | |
4966 | static int | |
f4dc4d17 | 4967 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 4968 | { |
f4dc4d17 DE |
4969 | const struct type_unit_group *lhs = item_lhs; |
4970 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 4971 | |
094b34ac | 4972 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 4973 | } |
348e048f | 4974 | |
f4dc4d17 DE |
4975 | /* Allocate a hash table for type unit groups. */ |
4976 | ||
4977 | static htab_t | |
4978 | allocate_type_unit_groups_table (void) | |
4979 | { | |
4980 | return htab_create_alloc_ex (3, | |
4981 | hash_type_unit_group, | |
4982 | eq_type_unit_group, | |
4983 | NULL, | |
4984 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
4985 | hashtab_obstack_allocate, | |
4986 | dummy_obstack_deallocate); | |
4987 | } | |
dee91e82 | 4988 | |
f4dc4d17 DE |
4989 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
4990 | partial symtabs. We combine several TUs per psymtab to not let the size | |
4991 | of any one psymtab grow too big. */ | |
4992 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
4993 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 4994 | |
094b34ac | 4995 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
4996 | Create the type_unit_group object used to hold one or more TUs. */ |
4997 | ||
4998 | static struct type_unit_group * | |
094b34ac | 4999 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5000 | { |
5001 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5002 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5003 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5004 | |
5005 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5006 | struct type_unit_group); | |
094b34ac | 5007 | per_cu = &tu_group->per_cu; |
f4dc4d17 DE |
5008 | per_cu->objfile = objfile; |
5009 | per_cu->is_debug_types = 1; | |
5010 | per_cu->s.type_unit_group = tu_group; | |
5011 | ||
094b34ac DE |
5012 | if (dwarf2_per_objfile->using_index) |
5013 | { | |
5014 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5015 | struct dwarf2_per_cu_quick_data); | |
5016 | tu_group->t.first_tu = cu->per_cu; | |
5017 | } | |
5018 | else | |
5019 | { | |
5020 | unsigned int line_offset = line_offset_struct.sect_off; | |
5021 | struct partial_symtab *pst; | |
5022 | char *name; | |
5023 | ||
5024 | /* Give the symtab a useful name for debug purposes. */ | |
5025 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5026 | name = xstrprintf ("<type_units_%d>", | |
5027 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5028 | else | |
5029 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5030 | ||
5031 | pst = create_partial_symtab (per_cu, name); | |
5032 | pst->anonymous = 1; | |
f4dc4d17 | 5033 | |
094b34ac DE |
5034 | xfree (name); |
5035 | } | |
f4dc4d17 | 5036 | |
094b34ac DE |
5037 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5038 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5039 | |
5040 | return tu_group; | |
5041 | } | |
5042 | ||
094b34ac DE |
5043 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5044 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5045 | |
5046 | static struct type_unit_group * | |
094b34ac | 5047 | get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list) |
f4dc4d17 DE |
5048 | { |
5049 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5050 | struct type_unit_group *tu_group; | |
5051 | void **slot; | |
5052 | unsigned int line_offset; | |
5053 | struct type_unit_group type_unit_group_for_lookup; | |
5054 | ||
5055 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5056 | { | |
5057 | dwarf2_per_objfile->type_unit_groups = | |
5058 | allocate_type_unit_groups_table (); | |
5059 | } | |
5060 | ||
5061 | /* Do we need to create a new group, or can we use an existing one? */ | |
5062 | ||
5063 | if (stmt_list) | |
5064 | { | |
5065 | line_offset = DW_UNSND (stmt_list); | |
5066 | ++tu_stats->nr_symtab_sharers; | |
5067 | } | |
5068 | else | |
5069 | { | |
5070 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5071 | We can do various things here like create one group per TU or | |
5072 | spread them over multiple groups to split up the expansion work. | |
5073 | To avoid worst case scenarios (too many groups or too large groups) | |
5074 | we, umm, group them in bunches. */ | |
5075 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5076 | | (tu_stats->nr_stmt_less_type_units | |
5077 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5078 | ++tu_stats->nr_stmt_less_type_units; | |
5079 | } | |
5080 | ||
094b34ac DE |
5081 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5082 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5083 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5084 | &type_unit_group_for_lookup, INSERT); | |
5085 | if (*slot != NULL) | |
5086 | { | |
5087 | tu_group = *slot; | |
5088 | gdb_assert (tu_group != NULL); | |
5089 | } | |
5090 | else | |
5091 | { | |
5092 | sect_offset line_offset_struct; | |
5093 | ||
5094 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5095 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5096 | *slot = tu_group; |
5097 | ++tu_stats->nr_symtabs; | |
5098 | } | |
5099 | ||
5100 | return tu_group; | |
5101 | } | |
5102 | ||
5103 | /* Struct used to sort TUs by their abbreviation table offset. */ | |
5104 | ||
5105 | struct tu_abbrev_offset | |
5106 | { | |
5107 | struct signatured_type *sig_type; | |
5108 | sect_offset abbrev_offset; | |
5109 | }; | |
5110 | ||
5111 | /* Helper routine for build_type_unit_groups, passed to qsort. */ | |
5112 | ||
5113 | static int | |
5114 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
5115 | { | |
5116 | const struct tu_abbrev_offset * const *a = ap; | |
5117 | const struct tu_abbrev_offset * const *b = bp; | |
5118 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
5119 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
5120 | ||
5121 | return (aoff > boff) - (aoff < boff); | |
5122 | } | |
5123 | ||
5124 | /* A helper function to add a type_unit_group to a table. */ | |
5125 | ||
5126 | static int | |
5127 | add_type_unit_group_to_table (void **slot, void *datum) | |
5128 | { | |
5129 | struct type_unit_group *tu_group = *slot; | |
5130 | struct type_unit_group ***datap = datum; | |
5131 | ||
5132 | **datap = tu_group; | |
5133 | ++*datap; | |
5134 | ||
5135 | return 1; | |
5136 | } | |
5137 | ||
5138 | /* Efficiently read all the type units, calling init_cutu_and_read_dies on | |
5139 | each one passing FUNC,DATA. | |
5140 | ||
5141 | The efficiency is because we sort TUs by the abbrev table they use and | |
5142 | only read each abbrev table once. In one program there are 200K TUs | |
5143 | sharing 8K abbrev tables. | |
5144 | ||
5145 | The main purpose of this function is to support building the | |
5146 | dwarf2_per_objfile->type_unit_groups table. | |
5147 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
5148 | can collapse the search space by grouping them by stmt_list. | |
5149 | The savings can be significant, in the same program from above the 200K TUs | |
5150 | share 8K stmt_list tables. | |
5151 | ||
5152 | FUNC is expected to call get_type_unit_group, which will create the | |
5153 | struct type_unit_group if necessary and add it to | |
5154 | dwarf2_per_objfile->type_unit_groups. */ | |
5155 | ||
5156 | static void | |
5157 | build_type_unit_groups (die_reader_func_ftype *func, void *data) | |
5158 | { | |
5159 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5160 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5161 | struct cleanup *cleanups; | |
5162 | struct abbrev_table *abbrev_table; | |
5163 | sect_offset abbrev_offset; | |
5164 | struct tu_abbrev_offset *sorted_by_abbrev; | |
5165 | struct type_unit_group **iter; | |
5166 | int i; | |
5167 | ||
5168 | /* It's up to the caller to not call us multiple times. */ | |
5169 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
5170 | ||
5171 | if (dwarf2_per_objfile->n_type_units == 0) | |
5172 | return; | |
5173 | ||
5174 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
5175 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
5176 | read each abbrev table in. | |
5177 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
5178 | This is simpler and efficient enough for now. | |
5179 | ||
5180 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
5181 | symtab to use). Typically TUs with the same abbrev offset have the same | |
5182 | stmt_list value too so in practice this should work well. | |
5183 | ||
5184 | The basic algorithm here is: | |
5185 | ||
5186 | sort TUs by abbrev table | |
5187 | for each TU with same abbrev table: | |
5188 | read abbrev table if first user | |
5189 | read TU top level DIE | |
5190 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
5191 | call FUNC */ | |
5192 | ||
5193 | if (dwarf2_read_debug) | |
5194 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
5195 | ||
5196 | /* Sort in a separate table to maintain the order of all_type_units | |
5197 | for .gdb_index: TU indices directly index all_type_units. */ | |
5198 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
5199 | dwarf2_per_objfile->n_type_units); | |
5200 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5201 | { | |
5202 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
5203 | ||
5204 | sorted_by_abbrev[i].sig_type = sig_type; | |
5205 | sorted_by_abbrev[i].abbrev_offset = | |
5206 | read_abbrev_offset (sig_type->per_cu.info_or_types_section, | |
5207 | sig_type->per_cu.offset); | |
5208 | } | |
5209 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
5210 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
5211 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
5212 | ||
094b34ac DE |
5213 | /* Note: In the .gdb_index case, get_type_unit_group may have already been |
5214 | called any number of times, so we don't reset tu_stats here. */ | |
5215 | ||
f4dc4d17 DE |
5216 | abbrev_offset.sect_off = ~(unsigned) 0; |
5217 | abbrev_table = NULL; | |
5218 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
5219 | ||
5220 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5221 | { | |
5222 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
5223 | ||
5224 | /* Switch to the next abbrev table if necessary. */ | |
5225 | if (abbrev_table == NULL | |
5226 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
5227 | { | |
5228 | if (abbrev_table != NULL) | |
5229 | { | |
5230 | abbrev_table_free (abbrev_table); | |
5231 | /* Reset to NULL in case abbrev_table_read_table throws | |
5232 | an error: abbrev_table_free_cleanup will get called. */ | |
5233 | abbrev_table = NULL; | |
5234 | } | |
5235 | abbrev_offset = tu->abbrev_offset; | |
5236 | abbrev_table = | |
5237 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
5238 | abbrev_offset); | |
5239 | ++tu_stats->nr_uniq_abbrev_tables; | |
5240 | } | |
5241 | ||
5242 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
5243 | func, data); | |
5244 | } | |
5245 | ||
5246 | /* Create a vector of pointers to primary type units to make it easy to | |
5247 | iterate over them and CUs. See dw2_get_primary_cu. */ | |
5248 | dwarf2_per_objfile->n_type_unit_groups = | |
5249 | htab_elements (dwarf2_per_objfile->type_unit_groups); | |
5250 | dwarf2_per_objfile->all_type_unit_groups = | |
5251 | obstack_alloc (&objfile->objfile_obstack, | |
5252 | dwarf2_per_objfile->n_type_unit_groups | |
5253 | * sizeof (struct type_unit_group *)); | |
5254 | iter = &dwarf2_per_objfile->all_type_unit_groups[0]; | |
5255 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5256 | add_type_unit_group_to_table, &iter); | |
5257 | gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0] | |
5258 | == dwarf2_per_objfile->n_type_unit_groups); | |
5259 | ||
5260 | do_cleanups (cleanups); | |
5261 | ||
5262 | if (dwarf2_read_debug) | |
5263 | { | |
5264 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
5265 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
5266 | dwarf2_per_objfile->n_type_units); | |
5267 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
5268 | tu_stats->nr_uniq_abbrev_tables); | |
5269 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
5270 | tu_stats->nr_symtabs); | |
5271 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
5272 | tu_stats->nr_symtab_sharers); | |
5273 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
5274 | tu_stats->nr_stmt_less_type_units); | |
5275 | } | |
5276 | } | |
5277 | ||
5278 | /* Reader function for build_type_psymtabs. */ | |
5279 | ||
5280 | static void | |
5281 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
5282 | gdb_byte *info_ptr, | |
5283 | struct die_info *type_unit_die, | |
5284 | int has_children, | |
5285 | void *data) | |
5286 | { | |
5287 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5288 | struct dwarf2_cu *cu = reader->cu; | |
5289 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5290 | struct type_unit_group *tu_group; | |
5291 | struct attribute *attr; | |
5292 | struct partial_die_info *first_die; | |
5293 | CORE_ADDR lowpc, highpc; | |
5294 | struct partial_symtab *pst; | |
5295 | ||
5296 | gdb_assert (data == NULL); | |
5297 | ||
5298 | if (! has_children) | |
5299 | return; | |
5300 | ||
5301 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 5302 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 5303 | |
094b34ac | 5304 | VEC_safe_push (dwarf2_per_cu_ptr, tu_group->t.tus, per_cu); |
f4dc4d17 DE |
5305 | |
5306 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
5307 | cu->list_in_scope = &file_symbols; | |
5308 | pst = create_partial_symtab (per_cu, ""); | |
5309 | pst->anonymous = 1; | |
5310 | ||
5311 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5312 | ||
5313 | lowpc = (CORE_ADDR) -1; | |
5314 | highpc = (CORE_ADDR) 0; | |
5315 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
5316 | ||
5317 | pst->n_global_syms = objfile->global_psymbols.next - | |
5318 | (objfile->global_psymbols.list + pst->globals_offset); | |
5319 | pst->n_static_syms = objfile->static_psymbols.next - | |
5320 | (objfile->static_psymbols.list + pst->statics_offset); | |
5321 | sort_pst_symbols (pst); | |
5322 | } | |
5323 | ||
5324 | /* Traversal function for build_type_psymtabs. */ | |
5325 | ||
5326 | static int | |
5327 | build_type_psymtab_dependencies (void **slot, void *info) | |
5328 | { | |
5329 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5330 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 5331 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 5332 | struct partial_symtab *pst = per_cu->v.psymtab; |
094b34ac | 5333 | int len = VEC_length (dwarf2_per_cu_ptr, tu_group->t.tus); |
f4dc4d17 DE |
5334 | struct dwarf2_per_cu_data *iter; |
5335 | int i; | |
5336 | ||
5337 | gdb_assert (len > 0); | |
5338 | ||
5339 | pst->number_of_dependencies = len; | |
5340 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5341 | len * sizeof (struct psymtab *)); | |
5342 | for (i = 0; | |
094b34ac | 5343 | VEC_iterate (dwarf2_per_cu_ptr, tu_group->t.tus, i, iter); |
f4dc4d17 DE |
5344 | ++i) |
5345 | { | |
5346 | pst->dependencies[i] = iter->v.psymtab; | |
5347 | iter->s.type_unit_group = tu_group; | |
5348 | } | |
5349 | ||
094b34ac | 5350 | VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus); |
348e048f DE |
5351 | |
5352 | return 1; | |
5353 | } | |
5354 | ||
5355 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5356 | Build partial symbol tables for the .debug_types comp-units. */ | |
5357 | ||
5358 | static void | |
5359 | build_type_psymtabs (struct objfile *objfile) | |
5360 | { | |
0e50663e | 5361 | if (! create_all_type_units (objfile)) |
348e048f DE |
5362 | return; |
5363 | ||
f4dc4d17 DE |
5364 | build_type_unit_groups (build_type_psymtabs_reader, NULL); |
5365 | ||
5366 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
5367 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5368 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
5369 | } |
5370 | ||
60606b2c TT |
5371 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
5372 | ||
5373 | static void | |
5374 | psymtabs_addrmap_cleanup (void *o) | |
5375 | { | |
5376 | struct objfile *objfile = o; | |
ec61707d | 5377 | |
60606b2c TT |
5378 | objfile->psymtabs_addrmap = NULL; |
5379 | } | |
5380 | ||
95554aad TT |
5381 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
5382 | ||
5383 | static void | |
5384 | set_partial_user (struct objfile *objfile) | |
5385 | { | |
5386 | int i; | |
5387 | ||
5388 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5389 | { | |
5390 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5391 | struct partial_symtab *pst = per_cu->v.psymtab; | |
5392 | int j; | |
5393 | ||
36586728 TT |
5394 | if (pst == NULL) |
5395 | continue; | |
5396 | ||
95554aad TT |
5397 | for (j = 0; j < pst->number_of_dependencies; ++j) |
5398 | { | |
5399 | /* Set the 'user' field only if it is not already set. */ | |
5400 | if (pst->dependencies[j]->user == NULL) | |
5401 | pst->dependencies[j]->user = pst; | |
5402 | } | |
5403 | } | |
5404 | } | |
5405 | ||
93311388 DE |
5406 | /* Build the partial symbol table by doing a quick pass through the |
5407 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 5408 | |
93311388 | 5409 | static void |
c67a9c90 | 5410 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 5411 | { |
60606b2c TT |
5412 | struct cleanup *back_to, *addrmap_cleanup; |
5413 | struct obstack temp_obstack; | |
21b2bd31 | 5414 | int i; |
93311388 | 5415 | |
45cfd468 DE |
5416 | if (dwarf2_read_debug) |
5417 | { | |
5418 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
5419 | objfile->name); | |
5420 | } | |
5421 | ||
98bfdba5 PA |
5422 | dwarf2_per_objfile->reading_partial_symbols = 1; |
5423 | ||
be391dca | 5424 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 5425 | |
93311388 DE |
5426 | /* Any cached compilation units will be linked by the per-objfile |
5427 | read_in_chain. Make sure to free them when we're done. */ | |
5428 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 5429 | |
348e048f DE |
5430 | build_type_psymtabs (objfile); |
5431 | ||
93311388 | 5432 | create_all_comp_units (objfile); |
c906108c | 5433 | |
60606b2c TT |
5434 | /* Create a temporary address map on a temporary obstack. We later |
5435 | copy this to the final obstack. */ | |
5436 | obstack_init (&temp_obstack); | |
5437 | make_cleanup_obstack_free (&temp_obstack); | |
5438 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
5439 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 5440 | |
21b2bd31 | 5441 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 5442 | { |
21b2bd31 | 5443 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
aaa75496 | 5444 | |
95554aad | 5445 | process_psymtab_comp_unit (per_cu, 0); |
c906108c | 5446 | } |
ff013f42 | 5447 | |
95554aad TT |
5448 | set_partial_user (objfile); |
5449 | ||
ff013f42 JK |
5450 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
5451 | &objfile->objfile_obstack); | |
60606b2c | 5452 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 5453 | |
ae038cb0 | 5454 | do_cleanups (back_to); |
45cfd468 DE |
5455 | |
5456 | if (dwarf2_read_debug) | |
5457 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
5458 | objfile->name); | |
ae038cb0 DJ |
5459 | } |
5460 | ||
3019eac3 | 5461 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
5462 | |
5463 | static void | |
dee91e82 DE |
5464 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
5465 | gdb_byte *info_ptr, | |
5466 | struct die_info *comp_unit_die, | |
5467 | int has_children, | |
5468 | void *data) | |
ae038cb0 | 5469 | { |
dee91e82 | 5470 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 5471 | |
95554aad | 5472 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 5473 | |
ae038cb0 DJ |
5474 | /* Check if comp unit has_children. |
5475 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 5476 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 5477 | if (has_children) |
dee91e82 DE |
5478 | load_partial_dies (reader, info_ptr, 0); |
5479 | } | |
98bfdba5 | 5480 | |
dee91e82 DE |
5481 | /* Load the partial DIEs for a secondary CU into memory. |
5482 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 5483 | |
dee91e82 DE |
5484 | static void |
5485 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
5486 | { | |
f4dc4d17 DE |
5487 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
5488 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
5489 | } |
5490 | ||
ae038cb0 | 5491 | static void |
36586728 TT |
5492 | read_comp_units_from_section (struct objfile *objfile, |
5493 | struct dwarf2_section_info *section, | |
5494 | unsigned int is_dwz, | |
5495 | int *n_allocated, | |
5496 | int *n_comp_units, | |
5497 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 5498 | { |
be391dca | 5499 | gdb_byte *info_ptr; |
36586728 | 5500 | bfd *abfd = section->asection->owner; |
be391dca | 5501 | |
36586728 | 5502 | dwarf2_read_section (objfile, section); |
ae038cb0 | 5503 | |
36586728 | 5504 | info_ptr = section->buffer; |
6e70227d | 5505 | |
36586728 | 5506 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 5507 | { |
c764a876 | 5508 | unsigned int length, initial_length_size; |
ae038cb0 | 5509 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 5510 | sect_offset offset; |
ae038cb0 | 5511 | |
36586728 | 5512 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
5513 | |
5514 | /* Read just enough information to find out where the next | |
5515 | compilation unit is. */ | |
36586728 | 5516 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
5517 | |
5518 | /* Save the compilation unit for later lookup. */ | |
5519 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
5520 | sizeof (struct dwarf2_per_cu_data)); | |
5521 | memset (this_cu, 0, sizeof (*this_cu)); | |
5522 | this_cu->offset = offset; | |
c764a876 | 5523 | this_cu->length = length + initial_length_size; |
36586728 | 5524 | this_cu->is_dwz = is_dwz; |
9291a0cd | 5525 | this_cu->objfile = objfile; |
36586728 | 5526 | this_cu->info_or_types_section = section; |
ae038cb0 | 5527 | |
36586728 | 5528 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 5529 | { |
36586728 TT |
5530 | *n_allocated *= 2; |
5531 | *all_comp_units = xrealloc (*all_comp_units, | |
5532 | *n_allocated | |
5533 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 5534 | } |
36586728 TT |
5535 | (*all_comp_units)[*n_comp_units] = this_cu; |
5536 | ++*n_comp_units; | |
ae038cb0 DJ |
5537 | |
5538 | info_ptr = info_ptr + this_cu->length; | |
5539 | } | |
36586728 TT |
5540 | } |
5541 | ||
5542 | /* Create a list of all compilation units in OBJFILE. | |
5543 | This is only done for -readnow and building partial symtabs. */ | |
5544 | ||
5545 | static void | |
5546 | create_all_comp_units (struct objfile *objfile) | |
5547 | { | |
5548 | int n_allocated; | |
5549 | int n_comp_units; | |
5550 | struct dwarf2_per_cu_data **all_comp_units; | |
5551 | ||
5552 | n_comp_units = 0; | |
5553 | n_allocated = 10; | |
5554 | all_comp_units = xmalloc (n_allocated | |
5555 | * sizeof (struct dwarf2_per_cu_data *)); | |
5556 | ||
5557 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
5558 | &n_allocated, &n_comp_units, &all_comp_units); | |
5559 | ||
5560 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
5561 | { | |
5562 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
5563 | ||
5564 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
5565 | &n_allocated, &n_comp_units, | |
5566 | &all_comp_units); | |
5567 | } | |
ae038cb0 DJ |
5568 | |
5569 | dwarf2_per_objfile->all_comp_units | |
5570 | = obstack_alloc (&objfile->objfile_obstack, | |
5571 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5572 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
5573 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5574 | xfree (all_comp_units); | |
5575 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
5576 | } |
5577 | ||
5734ee8b DJ |
5578 | /* Process all loaded DIEs for compilation unit CU, starting at |
5579 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
5580 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
5581 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
5582 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
5583 | and record the covered ranges in the addrmap. */ | |
c906108c | 5584 | |
72bf9492 DJ |
5585 | static void |
5586 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 5587 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 5588 | { |
72bf9492 | 5589 | struct partial_die_info *pdi; |
c906108c | 5590 | |
91c24f0a DC |
5591 | /* Now, march along the PDI's, descending into ones which have |
5592 | interesting children but skipping the children of the other ones, | |
5593 | until we reach the end of the compilation unit. */ | |
c906108c | 5594 | |
72bf9492 | 5595 | pdi = first_die; |
91c24f0a | 5596 | |
72bf9492 DJ |
5597 | while (pdi != NULL) |
5598 | { | |
5599 | fixup_partial_die (pdi, cu); | |
c906108c | 5600 | |
f55ee35c | 5601 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
5602 | children, so we need to look at them. Ditto for anonymous |
5603 | enums. */ | |
933c6fe4 | 5604 | |
72bf9492 | 5605 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
5606 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
5607 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 5608 | { |
72bf9492 | 5609 | switch (pdi->tag) |
c906108c SS |
5610 | { |
5611 | case DW_TAG_subprogram: | |
5734ee8b | 5612 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 5613 | break; |
72929c62 | 5614 | case DW_TAG_constant: |
c906108c SS |
5615 | case DW_TAG_variable: |
5616 | case DW_TAG_typedef: | |
91c24f0a | 5617 | case DW_TAG_union_type: |
72bf9492 | 5618 | if (!pdi->is_declaration) |
63d06c5c | 5619 | { |
72bf9492 | 5620 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
5621 | } |
5622 | break; | |
c906108c | 5623 | case DW_TAG_class_type: |
680b30c7 | 5624 | case DW_TAG_interface_type: |
c906108c | 5625 | case DW_TAG_structure_type: |
72bf9492 | 5626 | if (!pdi->is_declaration) |
c906108c | 5627 | { |
72bf9492 | 5628 | add_partial_symbol (pdi, cu); |
c906108c SS |
5629 | } |
5630 | break; | |
91c24f0a | 5631 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
5632 | if (!pdi->is_declaration) |
5633 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
5634 | break; |
5635 | case DW_TAG_base_type: | |
a02abb62 | 5636 | case DW_TAG_subrange_type: |
c906108c | 5637 | /* File scope base type definitions are added to the partial |
c5aa993b | 5638 | symbol table. */ |
72bf9492 | 5639 | add_partial_symbol (pdi, cu); |
c906108c | 5640 | break; |
d9fa45fe | 5641 | case DW_TAG_namespace: |
5734ee8b | 5642 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 5643 | break; |
5d7cb8df JK |
5644 | case DW_TAG_module: |
5645 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
5646 | break; | |
95554aad TT |
5647 | case DW_TAG_imported_unit: |
5648 | { | |
5649 | struct dwarf2_per_cu_data *per_cu; | |
5650 | ||
f4dc4d17 DE |
5651 | /* For now we don't handle imported units in type units. */ |
5652 | if (cu->per_cu->is_debug_types) | |
5653 | { | |
5654 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
5655 | " supported in type units [in module %s]"), | |
5656 | cu->objfile->name); | |
5657 | } | |
5658 | ||
95554aad | 5659 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 5660 | pdi->is_dwz, |
95554aad TT |
5661 | cu->objfile); |
5662 | ||
5663 | /* Go read the partial unit, if needed. */ | |
5664 | if (per_cu->v.psymtab == NULL) | |
5665 | process_psymtab_comp_unit (per_cu, 1); | |
5666 | ||
f4dc4d17 DE |
5667 | VEC_safe_push (dwarf2_per_cu_ptr, |
5668 | cu->per_cu->s.imported_symtabs, per_cu); | |
95554aad TT |
5669 | } |
5670 | break; | |
c906108c SS |
5671 | default: |
5672 | break; | |
5673 | } | |
5674 | } | |
5675 | ||
72bf9492 DJ |
5676 | /* If the die has a sibling, skip to the sibling. */ |
5677 | ||
5678 | pdi = pdi->die_sibling; | |
5679 | } | |
5680 | } | |
5681 | ||
5682 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 5683 | |
72bf9492 | 5684 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
5685 | name is concatenated with "::" and the partial DIE's name. For |
5686 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
5687 | Enumerators are an exception; they use the scope of their parent |
5688 | enumeration type, i.e. the name of the enumeration type is not | |
5689 | prepended to the enumerator. | |
91c24f0a | 5690 | |
72bf9492 DJ |
5691 | There are two complexities. One is DW_AT_specification; in this |
5692 | case "parent" means the parent of the target of the specification, | |
5693 | instead of the direct parent of the DIE. The other is compilers | |
5694 | which do not emit DW_TAG_namespace; in this case we try to guess | |
5695 | the fully qualified name of structure types from their members' | |
5696 | linkage names. This must be done using the DIE's children rather | |
5697 | than the children of any DW_AT_specification target. We only need | |
5698 | to do this for structures at the top level, i.e. if the target of | |
5699 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
5700 | have a parent. */ | |
5701 | ||
5702 | /* Compute the scope prefix associated with PDI's parent, in | |
5703 | compilation unit CU. The result will be allocated on CU's | |
5704 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
5705 | field. NULL is returned if no prefix is necessary. */ | |
5706 | static char * | |
5707 | partial_die_parent_scope (struct partial_die_info *pdi, | |
5708 | struct dwarf2_cu *cu) | |
5709 | { | |
5710 | char *grandparent_scope; | |
5711 | struct partial_die_info *parent, *real_pdi; | |
91c24f0a | 5712 | |
72bf9492 DJ |
5713 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
5714 | then this means the parent of the specification DIE. */ | |
5715 | ||
5716 | real_pdi = pdi; | |
72bf9492 | 5717 | while (real_pdi->has_specification) |
36586728 TT |
5718 | real_pdi = find_partial_die (real_pdi->spec_offset, |
5719 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
5720 | |
5721 | parent = real_pdi->die_parent; | |
5722 | if (parent == NULL) | |
5723 | return NULL; | |
5724 | ||
5725 | if (parent->scope_set) | |
5726 | return parent->scope; | |
5727 | ||
5728 | fixup_partial_die (parent, cu); | |
5729 | ||
10b3939b | 5730 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 5731 | |
acebe513 UW |
5732 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
5733 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
5734 | Work around this problem here. */ | |
5735 | if (cu->language == language_cplus | |
6e70227d | 5736 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
5737 | && strcmp (parent->name, "::") == 0 |
5738 | && grandparent_scope == NULL) | |
5739 | { | |
5740 | parent->scope = NULL; | |
5741 | parent->scope_set = 1; | |
5742 | return NULL; | |
5743 | } | |
5744 | ||
9c6c53f7 SA |
5745 | if (pdi->tag == DW_TAG_enumerator) |
5746 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
5747 | parent->scope = grandparent_scope; | |
5748 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 5749 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
5750 | || parent->tag == DW_TAG_structure_type |
5751 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 5752 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
5753 | || parent->tag == DW_TAG_union_type |
5754 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
5755 | { |
5756 | if (grandparent_scope == NULL) | |
5757 | parent->scope = parent->name; | |
5758 | else | |
3e43a32a MS |
5759 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
5760 | grandparent_scope, | |
f55ee35c | 5761 | parent->name, 0, cu); |
72bf9492 | 5762 | } |
72bf9492 DJ |
5763 | else |
5764 | { | |
5765 | /* FIXME drow/2004-04-01: What should we be doing with | |
5766 | function-local names? For partial symbols, we should probably be | |
5767 | ignoring them. */ | |
5768 | complaint (&symfile_complaints, | |
e2e0b3e5 | 5769 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 5770 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 5771 | parent->scope = grandparent_scope; |
c906108c SS |
5772 | } |
5773 | ||
72bf9492 DJ |
5774 | parent->scope_set = 1; |
5775 | return parent->scope; | |
5776 | } | |
5777 | ||
5778 | /* Return the fully scoped name associated with PDI, from compilation unit | |
5779 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 5780 | |
72bf9492 DJ |
5781 | static char * |
5782 | partial_die_full_name (struct partial_die_info *pdi, | |
5783 | struct dwarf2_cu *cu) | |
5784 | { | |
5785 | char *parent_scope; | |
5786 | ||
98bfdba5 PA |
5787 | /* If this is a template instantiation, we can not work out the |
5788 | template arguments from partial DIEs. So, unfortunately, we have | |
5789 | to go through the full DIEs. At least any work we do building | |
5790 | types here will be reused if full symbols are loaded later. */ | |
5791 | if (pdi->has_template_arguments) | |
5792 | { | |
5793 | fixup_partial_die (pdi, cu); | |
5794 | ||
5795 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
5796 | { | |
5797 | struct die_info *die; | |
5798 | struct attribute attr; | |
5799 | struct dwarf2_cu *ref_cu = cu; | |
5800 | ||
b64f50a1 | 5801 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
5802 | attr.name = 0; |
5803 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 5804 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
5805 | die = follow_die_ref (NULL, &attr, &ref_cu); |
5806 | ||
5807 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
5808 | } | |
5809 | } | |
5810 | ||
72bf9492 DJ |
5811 | parent_scope = partial_die_parent_scope (pdi, cu); |
5812 | if (parent_scope == NULL) | |
5813 | return NULL; | |
5814 | else | |
f55ee35c | 5815 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
5816 | } |
5817 | ||
5818 | static void | |
72bf9492 | 5819 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 5820 | { |
e7c27a73 | 5821 | struct objfile *objfile = cu->objfile; |
c906108c | 5822 | CORE_ADDR addr = 0; |
decbce07 | 5823 | char *actual_name = NULL; |
e142c38c | 5824 | CORE_ADDR baseaddr; |
72bf9492 | 5825 | int built_actual_name = 0; |
e142c38c DJ |
5826 | |
5827 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 5828 | |
94af9270 KS |
5829 | actual_name = partial_die_full_name (pdi, cu); |
5830 | if (actual_name) | |
5831 | built_actual_name = 1; | |
63d06c5c | 5832 | |
72bf9492 DJ |
5833 | if (actual_name == NULL) |
5834 | actual_name = pdi->name; | |
5835 | ||
c906108c SS |
5836 | switch (pdi->tag) |
5837 | { | |
5838 | case DW_TAG_subprogram: | |
2cfa0c8d | 5839 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 5840 | { |
2cfa0c8d JB |
5841 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
5842 | of the global scope. But in Ada, we want to be able to access | |
5843 | nested procedures globally. So all Ada subprograms are stored | |
5844 | in the global scope. */ | |
f47fb265 | 5845 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 5846 | mst_text, objfile); */ |
f47fb265 MS |
5847 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5848 | built_actual_name, | |
5849 | VAR_DOMAIN, LOC_BLOCK, | |
5850 | &objfile->global_psymbols, | |
5851 | 0, pdi->lowpc + baseaddr, | |
5852 | cu->language, objfile); | |
c906108c SS |
5853 | } |
5854 | else | |
5855 | { | |
f47fb265 | 5856 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 5857 | mst_file_text, objfile); */ |
f47fb265 MS |
5858 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5859 | built_actual_name, | |
5860 | VAR_DOMAIN, LOC_BLOCK, | |
5861 | &objfile->static_psymbols, | |
5862 | 0, pdi->lowpc + baseaddr, | |
5863 | cu->language, objfile); | |
c906108c SS |
5864 | } |
5865 | break; | |
72929c62 JB |
5866 | case DW_TAG_constant: |
5867 | { | |
5868 | struct psymbol_allocation_list *list; | |
5869 | ||
5870 | if (pdi->is_external) | |
5871 | list = &objfile->global_psymbols; | |
5872 | else | |
5873 | list = &objfile->static_psymbols; | |
f47fb265 MS |
5874 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5875 | built_actual_name, VAR_DOMAIN, LOC_STATIC, | |
5876 | list, 0, 0, cu->language, objfile); | |
72929c62 JB |
5877 | } |
5878 | break; | |
c906108c | 5879 | case DW_TAG_variable: |
95554aad TT |
5880 | if (pdi->d.locdesc) |
5881 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 5882 | |
95554aad | 5883 | if (pdi->d.locdesc |
caac4577 JG |
5884 | && addr == 0 |
5885 | && !dwarf2_per_objfile->has_section_at_zero) | |
5886 | { | |
5887 | /* A global or static variable may also have been stripped | |
5888 | out by the linker if unused, in which case its address | |
5889 | will be nullified; do not add such variables into partial | |
5890 | symbol table then. */ | |
5891 | } | |
5892 | else if (pdi->is_external) | |
c906108c SS |
5893 | { |
5894 | /* Global Variable. | |
5895 | Don't enter into the minimal symbol tables as there is | |
5896 | a minimal symbol table entry from the ELF symbols already. | |
5897 | Enter into partial symbol table if it has a location | |
5898 | descriptor or a type. | |
5899 | If the location descriptor is missing, new_symbol will create | |
5900 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
5901 | be determined from the minimal symbol table whenever the variable | |
5902 | is referenced. | |
5903 | The address for the partial symbol table entry is not | |
5904 | used by GDB, but it comes in handy for debugging partial symbol | |
5905 | table building. */ | |
5906 | ||
95554aad | 5907 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 MS |
5908 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5909 | built_actual_name, | |
5910 | VAR_DOMAIN, LOC_STATIC, | |
5911 | &objfile->global_psymbols, | |
5912 | 0, addr + baseaddr, | |
5913 | cu->language, objfile); | |
c906108c SS |
5914 | } |
5915 | else | |
5916 | { | |
0963b4bd | 5917 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 5918 | if (pdi->d.locdesc == NULL) |
decbce07 MS |
5919 | { |
5920 | if (built_actual_name) | |
5921 | xfree (actual_name); | |
5922 | return; | |
5923 | } | |
f47fb265 | 5924 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 5925 | mst_file_data, objfile); */ |
f47fb265 MS |
5926 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5927 | built_actual_name, | |
5928 | VAR_DOMAIN, LOC_STATIC, | |
5929 | &objfile->static_psymbols, | |
5930 | 0, addr + baseaddr, | |
5931 | cu->language, objfile); | |
c906108c SS |
5932 | } |
5933 | break; | |
5934 | case DW_TAG_typedef: | |
5935 | case DW_TAG_base_type: | |
a02abb62 | 5936 | case DW_TAG_subrange_type: |
38d518c9 | 5937 | add_psymbol_to_list (actual_name, strlen (actual_name), |
04a679b8 | 5938 | built_actual_name, |
176620f1 | 5939 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 5940 | &objfile->static_psymbols, |
e142c38c | 5941 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 5942 | break; |
72bf9492 DJ |
5943 | case DW_TAG_namespace: |
5944 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
04a679b8 | 5945 | built_actual_name, |
72bf9492 DJ |
5946 | VAR_DOMAIN, LOC_TYPEDEF, |
5947 | &objfile->global_psymbols, | |
5948 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
5949 | break; | |
c906108c | 5950 | case DW_TAG_class_type: |
680b30c7 | 5951 | case DW_TAG_interface_type: |
c906108c SS |
5952 | case DW_TAG_structure_type: |
5953 | case DW_TAG_union_type: | |
5954 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
5955 | /* Skip external references. The DWARF standard says in the section |
5956 | about "Structure, Union, and Class Type Entries": "An incomplete | |
5957 | structure, union or class type is represented by a structure, | |
5958 | union or class entry that does not have a byte size attribute | |
5959 | and that has a DW_AT_declaration attribute." */ | |
5960 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 MS |
5961 | { |
5962 | if (built_actual_name) | |
5963 | xfree (actual_name); | |
5964 | return; | |
5965 | } | |
fa4028e9 | 5966 | |
63d06c5c DC |
5967 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
5968 | static vs. global. */ | |
38d518c9 | 5969 | add_psymbol_to_list (actual_name, strlen (actual_name), |
04a679b8 | 5970 | built_actual_name, |
176620f1 | 5971 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
5972 | (cu->language == language_cplus |
5973 | || cu->language == language_java) | |
63d06c5c DC |
5974 | ? &objfile->global_psymbols |
5975 | : &objfile->static_psymbols, | |
e142c38c | 5976 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 5977 | |
c906108c SS |
5978 | break; |
5979 | case DW_TAG_enumerator: | |
38d518c9 | 5980 | add_psymbol_to_list (actual_name, strlen (actual_name), |
04a679b8 | 5981 | built_actual_name, |
176620f1 | 5982 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
5983 | (cu->language == language_cplus |
5984 | || cu->language == language_java) | |
f6fe98ef DJ |
5985 | ? &objfile->global_psymbols |
5986 | : &objfile->static_psymbols, | |
e142c38c | 5987 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
5988 | break; |
5989 | default: | |
5990 | break; | |
5991 | } | |
5c4e30ca | 5992 | |
72bf9492 DJ |
5993 | if (built_actual_name) |
5994 | xfree (actual_name); | |
c906108c SS |
5995 | } |
5996 | ||
5c4e30ca DC |
5997 | /* Read a partial die corresponding to a namespace; also, add a symbol |
5998 | corresponding to that namespace to the symbol table. NAMESPACE is | |
5999 | the name of the enclosing namespace. */ | |
91c24f0a | 6000 | |
72bf9492 DJ |
6001 | static void |
6002 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6003 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6004 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6005 | { |
72bf9492 | 6006 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6007 | |
72bf9492 | 6008 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6009 | |
6010 | /* Now scan partial symbols in that namespace. */ | |
6011 | ||
91c24f0a | 6012 | if (pdi->has_children) |
5734ee8b | 6013 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6014 | } |
6015 | ||
5d7cb8df JK |
6016 | /* Read a partial die corresponding to a Fortran module. */ |
6017 | ||
6018 | static void | |
6019 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6020 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6021 | { | |
f55ee35c | 6022 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6023 | |
6024 | if (pdi->has_children) | |
6025 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6026 | } | |
6027 | ||
bc30ff58 JB |
6028 | /* Read a partial die corresponding to a subprogram and create a partial |
6029 | symbol for that subprogram. When the CU language allows it, this | |
6030 | routine also defines a partial symbol for each nested subprogram | |
6031 | that this subprogram contains. | |
6e70227d | 6032 | |
bc30ff58 JB |
6033 | DIE my also be a lexical block, in which case we simply search |
6034 | recursively for suprograms defined inside that lexical block. | |
6035 | Again, this is only performed when the CU language allows this | |
6036 | type of definitions. */ | |
6037 | ||
6038 | static void | |
6039 | add_partial_subprogram (struct partial_die_info *pdi, | |
6040 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6041 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6042 | { |
6043 | if (pdi->tag == DW_TAG_subprogram) | |
6044 | { | |
6045 | if (pdi->has_pc_info) | |
6046 | { | |
6047 | if (pdi->lowpc < *lowpc) | |
6048 | *lowpc = pdi->lowpc; | |
6049 | if (pdi->highpc > *highpc) | |
6050 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6051 | if (need_pc) |
6052 | { | |
6053 | CORE_ADDR baseaddr; | |
6054 | struct objfile *objfile = cu->objfile; | |
6055 | ||
6056 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6057 | SECT_OFF_TEXT (objfile)); | |
6058 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6059 | pdi->lowpc + baseaddr, |
6060 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6061 | cu->per_cu->v.psymtab); |
5734ee8b | 6062 | } |
481860b3 GB |
6063 | } |
6064 | ||
6065 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6066 | { | |
bc30ff58 | 6067 | if (!pdi->is_declaration) |
e8d05480 JB |
6068 | /* Ignore subprogram DIEs that do not have a name, they are |
6069 | illegal. Do not emit a complaint at this point, we will | |
6070 | do so when we convert this psymtab into a symtab. */ | |
6071 | if (pdi->name) | |
6072 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6073 | } |
6074 | } | |
6e70227d | 6075 | |
bc30ff58 JB |
6076 | if (! pdi->has_children) |
6077 | return; | |
6078 | ||
6079 | if (cu->language == language_ada) | |
6080 | { | |
6081 | pdi = pdi->die_child; | |
6082 | while (pdi != NULL) | |
6083 | { | |
6084 | fixup_partial_die (pdi, cu); | |
6085 | if (pdi->tag == DW_TAG_subprogram | |
6086 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6087 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6088 | pdi = pdi->die_sibling; |
6089 | } | |
6090 | } | |
6091 | } | |
6092 | ||
91c24f0a DC |
6093 | /* Read a partial die corresponding to an enumeration type. */ |
6094 | ||
72bf9492 DJ |
6095 | static void |
6096 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6097 | struct dwarf2_cu *cu) | |
91c24f0a | 6098 | { |
72bf9492 | 6099 | struct partial_die_info *pdi; |
91c24f0a DC |
6100 | |
6101 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6102 | add_partial_symbol (enum_pdi, cu); |
6103 | ||
6104 | pdi = enum_pdi->die_child; | |
6105 | while (pdi) | |
91c24f0a | 6106 | { |
72bf9492 | 6107 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 6108 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 6109 | else |
72bf9492 DJ |
6110 | add_partial_symbol (pdi, cu); |
6111 | pdi = pdi->die_sibling; | |
91c24f0a | 6112 | } |
91c24f0a DC |
6113 | } |
6114 | ||
6caca83c CC |
6115 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
6116 | ||
6117 | static unsigned int | |
6118 | peek_abbrev_code (bfd *abfd, gdb_byte *info_ptr) | |
6119 | { | |
6120 | unsigned int bytes_read; | |
6121 | ||
6122 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6123 | } | |
6124 | ||
4bb7a0a7 DJ |
6125 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
6126 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
6127 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
6128 | the initial number. */ | |
6129 | ||
6130 | static struct abbrev_info * | |
fe1b8b76 | 6131 | peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 6132 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
6133 | { |
6134 | bfd *abfd = cu->objfile->obfd; | |
6135 | unsigned int abbrev_number; | |
6136 | struct abbrev_info *abbrev; | |
6137 | ||
6138 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
6139 | ||
6140 | if (abbrev_number == 0) | |
6141 | return NULL; | |
6142 | ||
433df2d4 | 6143 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
6144 | if (!abbrev) |
6145 | { | |
3e43a32a MS |
6146 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
6147 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
6148 | } |
6149 | ||
6150 | return abbrev; | |
6151 | } | |
6152 | ||
93311388 DE |
6153 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6154 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
6155 | DIE. Any children of the skipped DIEs will also be skipped. */ |
6156 | ||
fe1b8b76 | 6157 | static gdb_byte * |
dee91e82 | 6158 | skip_children (const struct die_reader_specs *reader, gdb_byte *info_ptr) |
4bb7a0a7 | 6159 | { |
dee91e82 | 6160 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
6161 | struct abbrev_info *abbrev; |
6162 | unsigned int bytes_read; | |
6163 | ||
6164 | while (1) | |
6165 | { | |
6166 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
6167 | if (abbrev == NULL) | |
6168 | return info_ptr + bytes_read; | |
6169 | else | |
dee91e82 | 6170 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
6171 | } |
6172 | } | |
6173 | ||
93311388 DE |
6174 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6175 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
6176 | abbrev corresponding to that skipped uleb128 should be passed in |
6177 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
6178 | children. */ | |
6179 | ||
fe1b8b76 | 6180 | static gdb_byte * |
dee91e82 DE |
6181 | skip_one_die (const struct die_reader_specs *reader, gdb_byte *info_ptr, |
6182 | struct abbrev_info *abbrev) | |
4bb7a0a7 DJ |
6183 | { |
6184 | unsigned int bytes_read; | |
6185 | struct attribute attr; | |
dee91e82 DE |
6186 | bfd *abfd = reader->abfd; |
6187 | struct dwarf2_cu *cu = reader->cu; | |
6188 | gdb_byte *buffer = reader->buffer; | |
f664829e DE |
6189 | const gdb_byte *buffer_end = reader->buffer_end; |
6190 | gdb_byte *start_info_ptr = info_ptr; | |
4bb7a0a7 DJ |
6191 | unsigned int form, i; |
6192 | ||
6193 | for (i = 0; i < abbrev->num_attrs; i++) | |
6194 | { | |
6195 | /* The only abbrev we care about is DW_AT_sibling. */ | |
6196 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
6197 | { | |
dee91e82 | 6198 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 6199 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
6200 | complaint (&symfile_complaints, |
6201 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 6202 | else |
b64f50a1 | 6203 | return buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
4bb7a0a7 DJ |
6204 | } |
6205 | ||
6206 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
6207 | form = abbrev->attrs[i].form; | |
6208 | skip_attribute: | |
6209 | switch (form) | |
6210 | { | |
4bb7a0a7 | 6211 | case DW_FORM_ref_addr: |
ae411497 TT |
6212 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
6213 | and later it is offset sized. */ | |
6214 | if (cu->header.version == 2) | |
6215 | info_ptr += cu->header.addr_size; | |
6216 | else | |
6217 | info_ptr += cu->header.offset_size; | |
6218 | break; | |
36586728 TT |
6219 | case DW_FORM_GNU_ref_alt: |
6220 | info_ptr += cu->header.offset_size; | |
6221 | break; | |
ae411497 | 6222 | case DW_FORM_addr: |
4bb7a0a7 DJ |
6223 | info_ptr += cu->header.addr_size; |
6224 | break; | |
6225 | case DW_FORM_data1: | |
6226 | case DW_FORM_ref1: | |
6227 | case DW_FORM_flag: | |
6228 | info_ptr += 1; | |
6229 | break; | |
2dc7f7b3 TT |
6230 | case DW_FORM_flag_present: |
6231 | break; | |
4bb7a0a7 DJ |
6232 | case DW_FORM_data2: |
6233 | case DW_FORM_ref2: | |
6234 | info_ptr += 2; | |
6235 | break; | |
6236 | case DW_FORM_data4: | |
6237 | case DW_FORM_ref4: | |
6238 | info_ptr += 4; | |
6239 | break; | |
6240 | case DW_FORM_data8: | |
6241 | case DW_FORM_ref8: | |
55f1336d | 6242 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
6243 | info_ptr += 8; |
6244 | break; | |
6245 | case DW_FORM_string: | |
9b1c24c8 | 6246 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
6247 | info_ptr += bytes_read; |
6248 | break; | |
2dc7f7b3 | 6249 | case DW_FORM_sec_offset: |
4bb7a0a7 | 6250 | case DW_FORM_strp: |
36586728 | 6251 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
6252 | info_ptr += cu->header.offset_size; |
6253 | break; | |
2dc7f7b3 | 6254 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
6255 | case DW_FORM_block: |
6256 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6257 | info_ptr += bytes_read; | |
6258 | break; | |
6259 | case DW_FORM_block1: | |
6260 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
6261 | break; | |
6262 | case DW_FORM_block2: | |
6263 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
6264 | break; | |
6265 | case DW_FORM_block4: | |
6266 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
6267 | break; | |
6268 | case DW_FORM_sdata: | |
6269 | case DW_FORM_udata: | |
6270 | case DW_FORM_ref_udata: | |
3019eac3 DE |
6271 | case DW_FORM_GNU_addr_index: |
6272 | case DW_FORM_GNU_str_index: | |
f664829e | 6273 | info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
6274 | break; |
6275 | case DW_FORM_indirect: | |
6276 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6277 | info_ptr += bytes_read; | |
6278 | /* We need to continue parsing from here, so just go back to | |
6279 | the top. */ | |
6280 | goto skip_attribute; | |
6281 | ||
6282 | default: | |
3e43a32a MS |
6283 | error (_("Dwarf Error: Cannot handle %s " |
6284 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
6285 | dwarf_form_name (form), |
6286 | bfd_get_filename (abfd)); | |
6287 | } | |
6288 | } | |
6289 | ||
6290 | if (abbrev->has_children) | |
dee91e82 | 6291 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
6292 | else |
6293 | return info_ptr; | |
6294 | } | |
6295 | ||
93311388 | 6296 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 6297 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 6298 | |
fe1b8b76 | 6299 | static gdb_byte * |
dee91e82 DE |
6300 | locate_pdi_sibling (const struct die_reader_specs *reader, |
6301 | struct partial_die_info *orig_pdi, | |
6302 | gdb_byte *info_ptr) | |
91c24f0a DC |
6303 | { |
6304 | /* Do we know the sibling already? */ | |
72bf9492 | 6305 | |
91c24f0a DC |
6306 | if (orig_pdi->sibling) |
6307 | return orig_pdi->sibling; | |
6308 | ||
6309 | /* Are there any children to deal with? */ | |
6310 | ||
6311 | if (!orig_pdi->has_children) | |
6312 | return info_ptr; | |
6313 | ||
4bb7a0a7 | 6314 | /* Skip the children the long way. */ |
91c24f0a | 6315 | |
dee91e82 | 6316 | return skip_children (reader, info_ptr); |
91c24f0a DC |
6317 | } |
6318 | ||
c906108c SS |
6319 | /* Expand this partial symbol table into a full symbol table. */ |
6320 | ||
6321 | static void | |
fba45db2 | 6322 | dwarf2_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c | 6323 | { |
c906108c SS |
6324 | if (pst != NULL) |
6325 | { | |
6326 | if (pst->readin) | |
6327 | { | |
3e43a32a MS |
6328 | warning (_("bug: psymtab for %s is already read in."), |
6329 | pst->filename); | |
c906108c SS |
6330 | } |
6331 | else | |
6332 | { | |
6333 | if (info_verbose) | |
6334 | { | |
3e43a32a MS |
6335 | printf_filtered (_("Reading in symbols for %s..."), |
6336 | pst->filename); | |
c906108c SS |
6337 | gdb_flush (gdb_stdout); |
6338 | } | |
6339 | ||
10b3939b DJ |
6340 | /* Restore our global data. */ |
6341 | dwarf2_per_objfile = objfile_data (pst->objfile, | |
6342 | dwarf2_objfile_data_key); | |
6343 | ||
b2ab525c KB |
6344 | /* If this psymtab is constructed from a debug-only objfile, the |
6345 | has_section_at_zero flag will not necessarily be correct. We | |
6346 | can get the correct value for this flag by looking at the data | |
6347 | associated with the (presumably stripped) associated objfile. */ | |
6348 | if (pst->objfile->separate_debug_objfile_backlink) | |
6349 | { | |
6350 | struct dwarf2_per_objfile *dpo_backlink | |
6351 | = objfile_data (pst->objfile->separate_debug_objfile_backlink, | |
6352 | dwarf2_objfile_data_key); | |
9a619af0 | 6353 | |
b2ab525c KB |
6354 | dwarf2_per_objfile->has_section_at_zero |
6355 | = dpo_backlink->has_section_at_zero; | |
6356 | } | |
6357 | ||
98bfdba5 PA |
6358 | dwarf2_per_objfile->reading_partial_symbols = 0; |
6359 | ||
c906108c SS |
6360 | psymtab_to_symtab_1 (pst); |
6361 | ||
6362 | /* Finish up the debug error message. */ | |
6363 | if (info_verbose) | |
a3f17187 | 6364 | printf_filtered (_("done.\n")); |
c906108c SS |
6365 | } |
6366 | } | |
95554aad TT |
6367 | |
6368 | process_cu_includes (); | |
c906108c | 6369 | } |
9cdd5dbd DE |
6370 | \f |
6371 | /* Reading in full CUs. */ | |
c906108c | 6372 | |
10b3939b DJ |
6373 | /* Add PER_CU to the queue. */ |
6374 | ||
6375 | static void | |
95554aad TT |
6376 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
6377 | enum language pretend_language) | |
10b3939b DJ |
6378 | { |
6379 | struct dwarf2_queue_item *item; | |
6380 | ||
6381 | per_cu->queued = 1; | |
6382 | item = xmalloc (sizeof (*item)); | |
6383 | item->per_cu = per_cu; | |
95554aad | 6384 | item->pretend_language = pretend_language; |
10b3939b DJ |
6385 | item->next = NULL; |
6386 | ||
6387 | if (dwarf2_queue == NULL) | |
6388 | dwarf2_queue = item; | |
6389 | else | |
6390 | dwarf2_queue_tail->next = item; | |
6391 | ||
6392 | dwarf2_queue_tail = item; | |
6393 | } | |
6394 | ||
0907af0c DE |
6395 | /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation |
6396 | unit and add it to our queue. | |
6397 | The result is non-zero if PER_CU was queued, otherwise the result is zero | |
6398 | meaning either PER_CU is already queued or it is already loaded. */ | |
6399 | ||
6400 | static int | |
6401 | maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
6402 | struct dwarf2_per_cu_data *per_cu, | |
6403 | enum language pretend_language) | |
6404 | { | |
6405 | /* We may arrive here during partial symbol reading, if we need full | |
6406 | DIEs to process an unusual case (e.g. template arguments). Do | |
6407 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
6408 | if (dwarf2_per_objfile->reading_partial_symbols) | |
6409 | { | |
6410 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
6411 | return 1; | |
6412 | return 0; | |
6413 | } | |
6414 | ||
6415 | /* Mark the dependence relation so that we don't flush PER_CU | |
6416 | too early. */ | |
6417 | dwarf2_add_dependence (this_cu, per_cu); | |
6418 | ||
6419 | /* If it's already on the queue, we have nothing to do. */ | |
6420 | if (per_cu->queued) | |
6421 | return 0; | |
6422 | ||
6423 | /* If the compilation unit is already loaded, just mark it as | |
6424 | used. */ | |
6425 | if (per_cu->cu != NULL) | |
6426 | { | |
6427 | per_cu->cu->last_used = 0; | |
6428 | return 0; | |
6429 | } | |
6430 | ||
6431 | /* Add it to the queue. */ | |
6432 | queue_comp_unit (per_cu, pretend_language); | |
6433 | ||
6434 | return 1; | |
6435 | } | |
6436 | ||
10b3939b DJ |
6437 | /* Process the queue. */ |
6438 | ||
6439 | static void | |
a0f42c21 | 6440 | process_queue (void) |
10b3939b DJ |
6441 | { |
6442 | struct dwarf2_queue_item *item, *next_item; | |
6443 | ||
45cfd468 DE |
6444 | if (dwarf2_read_debug) |
6445 | { | |
6446 | fprintf_unfiltered (gdb_stdlog, | |
6447 | "Expanding one or more symtabs of objfile %s ...\n", | |
6448 | dwarf2_per_objfile->objfile->name); | |
6449 | } | |
6450 | ||
03dd20cc DJ |
6451 | /* The queue starts out with one item, but following a DIE reference |
6452 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
6453 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
6454 | { | |
9291a0cd TT |
6455 | if (dwarf2_per_objfile->using_index |
6456 | ? !item->per_cu->v.quick->symtab | |
6457 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
6458 | { |
6459 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
6460 | ||
6461 | if (dwarf2_read_debug) | |
6462 | { | |
6463 | fprintf_unfiltered (gdb_stdlog, | |
6464 | "Expanding symtab of %s at offset 0x%x\n", | |
6465 | per_cu->is_debug_types ? "TU" : "CU", | |
6466 | per_cu->offset.sect_off); | |
6467 | } | |
6468 | ||
6469 | if (per_cu->is_debug_types) | |
6470 | process_full_type_unit (per_cu, item->pretend_language); | |
6471 | else | |
6472 | process_full_comp_unit (per_cu, item->pretend_language); | |
6473 | ||
6474 | if (dwarf2_read_debug) | |
6475 | { | |
6476 | fprintf_unfiltered (gdb_stdlog, | |
6477 | "Done expanding %s at offset 0x%x\n", | |
6478 | per_cu->is_debug_types ? "TU" : "CU", | |
6479 | per_cu->offset.sect_off); | |
6480 | } | |
6481 | } | |
10b3939b DJ |
6482 | |
6483 | item->per_cu->queued = 0; | |
6484 | next_item = item->next; | |
6485 | xfree (item); | |
6486 | } | |
6487 | ||
6488 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
6489 | |
6490 | if (dwarf2_read_debug) | |
6491 | { | |
6492 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
6493 | dwarf2_per_objfile->objfile->name); | |
6494 | } | |
10b3939b DJ |
6495 | } |
6496 | ||
6497 | /* Free all allocated queue entries. This function only releases anything if | |
6498 | an error was thrown; if the queue was processed then it would have been | |
6499 | freed as we went along. */ | |
6500 | ||
6501 | static void | |
6502 | dwarf2_release_queue (void *dummy) | |
6503 | { | |
6504 | struct dwarf2_queue_item *item, *last; | |
6505 | ||
6506 | item = dwarf2_queue; | |
6507 | while (item) | |
6508 | { | |
6509 | /* Anything still marked queued is likely to be in an | |
6510 | inconsistent state, so discard it. */ | |
6511 | if (item->per_cu->queued) | |
6512 | { | |
6513 | if (item->per_cu->cu != NULL) | |
dee91e82 | 6514 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
6515 | item->per_cu->queued = 0; |
6516 | } | |
6517 | ||
6518 | last = item; | |
6519 | item = item->next; | |
6520 | xfree (last); | |
6521 | } | |
6522 | ||
6523 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
6524 | } | |
6525 | ||
6526 | /* Read in full symbols for PST, and anything it depends on. */ | |
6527 | ||
c906108c | 6528 | static void |
fba45db2 | 6529 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 6530 | { |
10b3939b | 6531 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
6532 | int i; |
6533 | ||
95554aad TT |
6534 | if (pst->readin) |
6535 | return; | |
6536 | ||
aaa75496 | 6537 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
6538 | if (!pst->dependencies[i]->readin |
6539 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
6540 | { |
6541 | /* Inform about additional files that need to be read in. */ | |
6542 | if (info_verbose) | |
6543 | { | |
a3f17187 | 6544 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
6545 | fputs_filtered (" ", gdb_stdout); |
6546 | wrap_here (""); | |
6547 | fputs_filtered ("and ", gdb_stdout); | |
6548 | wrap_here (""); | |
6549 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 6550 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
6551 | gdb_flush (gdb_stdout); |
6552 | } | |
6553 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
6554 | } | |
6555 | ||
e38df1d0 | 6556 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
6557 | |
6558 | if (per_cu == NULL) | |
aaa75496 JB |
6559 | { |
6560 | /* It's an include file, no symbols to read for it. | |
6561 | Everything is in the parent symtab. */ | |
6562 | pst->readin = 1; | |
6563 | return; | |
6564 | } | |
c906108c | 6565 | |
a0f42c21 | 6566 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
6567 | } |
6568 | ||
dee91e82 DE |
6569 | /* Trivial hash function for die_info: the hash value of a DIE |
6570 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 6571 | |
dee91e82 DE |
6572 | static hashval_t |
6573 | die_hash (const void *item) | |
10b3939b | 6574 | { |
dee91e82 | 6575 | const struct die_info *die = item; |
6502dd73 | 6576 | |
dee91e82 DE |
6577 | return die->offset.sect_off; |
6578 | } | |
63d06c5c | 6579 | |
dee91e82 DE |
6580 | /* Trivial comparison function for die_info structures: two DIEs |
6581 | are equal if they have the same offset. */ | |
98bfdba5 | 6582 | |
dee91e82 DE |
6583 | static int |
6584 | die_eq (const void *item_lhs, const void *item_rhs) | |
6585 | { | |
6586 | const struct die_info *die_lhs = item_lhs; | |
6587 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 6588 | |
dee91e82 DE |
6589 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
6590 | } | |
c906108c | 6591 | |
dee91e82 DE |
6592 | /* die_reader_func for load_full_comp_unit. |
6593 | This is identical to read_signatured_type_reader, | |
6594 | but is kept separate for now. */ | |
c906108c | 6595 | |
dee91e82 DE |
6596 | static void |
6597 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
6598 | gdb_byte *info_ptr, | |
6599 | struct die_info *comp_unit_die, | |
6600 | int has_children, | |
6601 | void *data) | |
6602 | { | |
6603 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 6604 | enum language *language_ptr = data; |
6caca83c | 6605 | |
dee91e82 DE |
6606 | gdb_assert (cu->die_hash == NULL); |
6607 | cu->die_hash = | |
6608 | htab_create_alloc_ex (cu->header.length / 12, | |
6609 | die_hash, | |
6610 | die_eq, | |
6611 | NULL, | |
6612 | &cu->comp_unit_obstack, | |
6613 | hashtab_obstack_allocate, | |
6614 | dummy_obstack_deallocate); | |
e142c38c | 6615 | |
dee91e82 DE |
6616 | if (has_children) |
6617 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
6618 | &info_ptr, comp_unit_die); | |
6619 | cu->dies = comp_unit_die; | |
6620 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
6621 | |
6622 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 6623 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 6624 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
6625 | or we won't be able to build types correctly. |
6626 | Similarly, if we do not read the producer, we can not apply | |
6627 | producer-specific interpretation. */ | |
95554aad | 6628 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 6629 | } |
10b3939b | 6630 | |
dee91e82 | 6631 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 6632 | |
dee91e82 | 6633 | static void |
95554aad TT |
6634 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
6635 | enum language pretend_language) | |
dee91e82 | 6636 | { |
3019eac3 | 6637 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 6638 | |
f4dc4d17 DE |
6639 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6640 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
6641 | } |
6642 | ||
3da10d80 KS |
6643 | /* Add a DIE to the delayed physname list. */ |
6644 | ||
6645 | static void | |
6646 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
6647 | const char *name, struct die_info *die, | |
6648 | struct dwarf2_cu *cu) | |
6649 | { | |
6650 | struct delayed_method_info mi; | |
6651 | mi.type = type; | |
6652 | mi.fnfield_index = fnfield_index; | |
6653 | mi.index = index; | |
6654 | mi.name = name; | |
6655 | mi.die = die; | |
6656 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
6657 | } | |
6658 | ||
6659 | /* A cleanup for freeing the delayed method list. */ | |
6660 | ||
6661 | static void | |
6662 | free_delayed_list (void *ptr) | |
6663 | { | |
6664 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
6665 | if (cu->method_list != NULL) | |
6666 | { | |
6667 | VEC_free (delayed_method_info, cu->method_list); | |
6668 | cu->method_list = NULL; | |
6669 | } | |
6670 | } | |
6671 | ||
6672 | /* Compute the physnames of any methods on the CU's method list. | |
6673 | ||
6674 | The computation of method physnames is delayed in order to avoid the | |
6675 | (bad) condition that one of the method's formal parameters is of an as yet | |
6676 | incomplete type. */ | |
6677 | ||
6678 | static void | |
6679 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
6680 | { | |
6681 | int i; | |
6682 | struct delayed_method_info *mi; | |
6683 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
6684 | { | |
1d06ead6 | 6685 | const char *physname; |
3da10d80 KS |
6686 | struct fn_fieldlist *fn_flp |
6687 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
1d06ead6 | 6688 | physname = dwarf2_physname ((char *) mi->name, mi->die, cu); |
3da10d80 KS |
6689 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
6690 | } | |
6691 | } | |
6692 | ||
a766d390 DE |
6693 | /* Go objects should be embedded in a DW_TAG_module DIE, |
6694 | and it's not clear if/how imported objects will appear. | |
6695 | To keep Go support simple until that's worked out, | |
6696 | go back through what we've read and create something usable. | |
6697 | We could do this while processing each DIE, and feels kinda cleaner, | |
6698 | but that way is more invasive. | |
6699 | This is to, for example, allow the user to type "p var" or "b main" | |
6700 | without having to specify the package name, and allow lookups | |
6701 | of module.object to work in contexts that use the expression | |
6702 | parser. */ | |
6703 | ||
6704 | static void | |
6705 | fixup_go_packaging (struct dwarf2_cu *cu) | |
6706 | { | |
6707 | char *package_name = NULL; | |
6708 | struct pending *list; | |
6709 | int i; | |
6710 | ||
6711 | for (list = global_symbols; list != NULL; list = list->next) | |
6712 | { | |
6713 | for (i = 0; i < list->nsyms; ++i) | |
6714 | { | |
6715 | struct symbol *sym = list->symbol[i]; | |
6716 | ||
6717 | if (SYMBOL_LANGUAGE (sym) == language_go | |
6718 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
6719 | { | |
6720 | char *this_package_name = go_symbol_package_name (sym); | |
6721 | ||
6722 | if (this_package_name == NULL) | |
6723 | continue; | |
6724 | if (package_name == NULL) | |
6725 | package_name = this_package_name; | |
6726 | else | |
6727 | { | |
6728 | if (strcmp (package_name, this_package_name) != 0) | |
6729 | complaint (&symfile_complaints, | |
6730 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 TT |
6731 | (SYMBOL_SYMTAB (sym) |
6732 | && SYMBOL_SYMTAB (sym)->filename | |
6733 | ? SYMBOL_SYMTAB (sym)->filename | |
a766d390 DE |
6734 | : cu->objfile->name), |
6735 | this_package_name, package_name); | |
6736 | xfree (this_package_name); | |
6737 | } | |
6738 | } | |
6739 | } | |
6740 | } | |
6741 | ||
6742 | if (package_name != NULL) | |
6743 | { | |
6744 | struct objfile *objfile = cu->objfile; | |
6745 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, | |
6746 | package_name, objfile); | |
6747 | struct symbol *sym; | |
6748 | ||
6749 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
6750 | ||
6751 | sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol); | |
6752 | SYMBOL_SET_LANGUAGE (sym, language_go); | |
6753 | SYMBOL_SET_NAMES (sym, package_name, strlen (package_name), 1, objfile); | |
6754 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, | |
6755 | e.g., "main" finds the "main" module and not C's main(). */ | |
6756 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
6757 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
6758 | SYMBOL_TYPE (sym) = type; | |
6759 | ||
6760 | add_symbol_to_list (sym, &global_symbols); | |
6761 | ||
6762 | xfree (package_name); | |
6763 | } | |
6764 | } | |
6765 | ||
95554aad TT |
6766 | static void compute_symtab_includes (struct dwarf2_per_cu_data *per_cu); |
6767 | ||
6768 | /* Return the symtab for PER_CU. This works properly regardless of | |
6769 | whether we're using the index or psymtabs. */ | |
6770 | ||
6771 | static struct symtab * | |
6772 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
6773 | { | |
6774 | return (dwarf2_per_objfile->using_index | |
6775 | ? per_cu->v.quick->symtab | |
6776 | : per_cu->v.psymtab->symtab); | |
6777 | } | |
6778 | ||
6779 | /* A helper function for computing the list of all symbol tables | |
6780 | included by PER_CU. */ | |
6781 | ||
6782 | static void | |
6783 | recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result, | |
6784 | htab_t all_children, | |
6785 | struct dwarf2_per_cu_data *per_cu) | |
6786 | { | |
6787 | void **slot; | |
6788 | int ix; | |
6789 | struct dwarf2_per_cu_data *iter; | |
6790 | ||
6791 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
6792 | if (*slot != NULL) | |
6793 | { | |
6794 | /* This inclusion and its children have been processed. */ | |
6795 | return; | |
6796 | } | |
6797 | ||
6798 | *slot = per_cu; | |
6799 | /* Only add a CU if it has a symbol table. */ | |
6800 | if (get_symtab (per_cu) != NULL) | |
6801 | VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu); | |
6802 | ||
6803 | for (ix = 0; | |
f4dc4d17 | 6804 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs, ix, iter); |
95554aad TT |
6805 | ++ix) |
6806 | recursively_compute_inclusions (result, all_children, iter); | |
6807 | } | |
6808 | ||
6809 | /* Compute the symtab 'includes' fields for the symtab related to | |
6810 | PER_CU. */ | |
6811 | ||
6812 | static void | |
6813 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
6814 | { | |
f4dc4d17 DE |
6815 | gdb_assert (! per_cu->is_debug_types); |
6816 | ||
6817 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs)) | |
95554aad TT |
6818 | { |
6819 | int ix, len; | |
6820 | struct dwarf2_per_cu_data *iter; | |
6821 | VEC (dwarf2_per_cu_ptr) *result_children = NULL; | |
6822 | htab_t all_children; | |
6823 | struct symtab *symtab = get_symtab (per_cu); | |
6824 | ||
6825 | /* If we don't have a symtab, we can just skip this case. */ | |
6826 | if (symtab == NULL) | |
6827 | return; | |
6828 | ||
6829 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
6830 | NULL, xcalloc, xfree); | |
6831 | ||
6832 | for (ix = 0; | |
f4dc4d17 | 6833 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs, |
95554aad TT |
6834 | ix, iter); |
6835 | ++ix) | |
6836 | recursively_compute_inclusions (&result_children, all_children, iter); | |
6837 | ||
6838 | /* Now we have a transitive closure of all the included CUs, so | |
6839 | we can convert it to a list of symtabs. */ | |
6840 | len = VEC_length (dwarf2_per_cu_ptr, result_children); | |
6841 | symtab->includes | |
6842 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
6843 | (len + 1) * sizeof (struct symtab *)); | |
6844 | for (ix = 0; | |
6845 | VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter); | |
6846 | ++ix) | |
6847 | symtab->includes[ix] = get_symtab (iter); | |
6848 | symtab->includes[len] = NULL; | |
6849 | ||
6850 | VEC_free (dwarf2_per_cu_ptr, result_children); | |
6851 | htab_delete (all_children); | |
6852 | } | |
6853 | } | |
6854 | ||
6855 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
6856 | read. */ | |
6857 | ||
6858 | static void | |
6859 | process_cu_includes (void) | |
6860 | { | |
6861 | int ix; | |
6862 | struct dwarf2_per_cu_data *iter; | |
6863 | ||
6864 | for (ix = 0; | |
6865 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
6866 | ix, iter); | |
6867 | ++ix) | |
f4dc4d17 DE |
6868 | { |
6869 | if (! iter->is_debug_types) | |
6870 | compute_symtab_includes (iter); | |
6871 | } | |
95554aad TT |
6872 | |
6873 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
6874 | } | |
6875 | ||
9cdd5dbd | 6876 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
6877 | already been loaded into memory. */ |
6878 | ||
6879 | static void | |
95554aad TT |
6880 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
6881 | enum language pretend_language) | |
10b3939b | 6882 | { |
10b3939b | 6883 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 6884 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
6885 | CORE_ADDR lowpc, highpc; |
6886 | struct symtab *symtab; | |
3da10d80 | 6887 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 6888 | CORE_ADDR baseaddr; |
4359dff1 | 6889 | struct block *static_block; |
10b3939b DJ |
6890 | |
6891 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6892 | ||
10b3939b DJ |
6893 | buildsym_init (); |
6894 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 6895 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
6896 | |
6897 | cu->list_in_scope = &file_symbols; | |
c906108c | 6898 | |
95554aad TT |
6899 | cu->language = pretend_language; |
6900 | cu->language_defn = language_def (cu->language); | |
6901 | ||
c906108c | 6902 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 6903 | process_die (cu->dies, cu); |
c906108c | 6904 | |
a766d390 DE |
6905 | /* For now fudge the Go package. */ |
6906 | if (cu->language == language_go) | |
6907 | fixup_go_packaging (cu); | |
6908 | ||
3da10d80 KS |
6909 | /* Now that we have processed all the DIEs in the CU, all the types |
6910 | should be complete, and it should now be safe to compute all of the | |
6911 | physnames. */ | |
6912 | compute_delayed_physnames (cu); | |
6913 | do_cleanups (delayed_list_cleanup); | |
6914 | ||
fae299cd DC |
6915 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
6916 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
6917 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 6918 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 6919 | |
36586728 TT |
6920 | static_block |
6921 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, | |
6922 | per_cu->s.imported_symtabs != NULL); | |
4359dff1 JK |
6923 | |
6924 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
6925 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
6926 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
6927 | addrmap to help ensure it has an accurate map of pc values belonging to | |
6928 | this comp unit. */ | |
6929 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
6930 | ||
6931 | symtab = end_symtab_from_static_block (static_block, objfile, | |
6932 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 6933 | |
8be455d7 | 6934 | if (symtab != NULL) |
c906108c | 6935 | { |
df15bd07 | 6936 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 6937 | |
8be455d7 JK |
6938 | /* Set symtab language to language from DW_AT_language. If the |
6939 | compilation is from a C file generated by language preprocessors, do | |
6940 | not set the language if it was already deduced by start_subfile. */ | |
6941 | if (!(cu->language == language_c && symtab->language != language_c)) | |
6942 | symtab->language = cu->language; | |
6943 | ||
6944 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
6945 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
6946 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
6947 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
6948 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
6949 | |
6950 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
6951 | needed, it would be wrong due to missing DW_AT_producer there. | |
6952 | ||
6953 | Still one can confuse GDB by using non-standard GCC compilation | |
6954 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
6955 | */ | |
ab260dad | 6956 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 6957 | symtab->locations_valid = 1; |
e0d00bc7 JK |
6958 | |
6959 | if (gcc_4_minor >= 5) | |
6960 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
6961 | |
6962 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 6963 | } |
9291a0cd TT |
6964 | |
6965 | if (dwarf2_per_objfile->using_index) | |
6966 | per_cu->v.quick->symtab = symtab; | |
6967 | else | |
6968 | { | |
6969 | struct partial_symtab *pst = per_cu->v.psymtab; | |
6970 | pst->symtab = symtab; | |
6971 | pst->readin = 1; | |
6972 | } | |
c906108c | 6973 | |
95554aad TT |
6974 | /* Push it for inclusion processing later. */ |
6975 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
6976 | ||
c906108c | 6977 | do_cleanups (back_to); |
f4dc4d17 | 6978 | } |
45cfd468 | 6979 | |
f4dc4d17 DE |
6980 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
6981 | already been loaded into memory. */ | |
6982 | ||
6983 | static void | |
6984 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
6985 | enum language pretend_language) | |
6986 | { | |
6987 | struct dwarf2_cu *cu = per_cu->cu; | |
6988 | struct objfile *objfile = per_cu->objfile; | |
6989 | struct symtab *symtab; | |
6990 | struct cleanup *back_to, *delayed_list_cleanup; | |
6991 | ||
6992 | buildsym_init (); | |
6993 | back_to = make_cleanup (really_free_pendings, NULL); | |
6994 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
6995 | ||
6996 | cu->list_in_scope = &file_symbols; | |
6997 | ||
6998 | cu->language = pretend_language; | |
6999 | cu->language_defn = language_def (cu->language); | |
7000 | ||
7001 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7002 | process_die (cu->dies, cu); | |
7003 | ||
7004 | /* For now fudge the Go package. */ | |
7005 | if (cu->language == language_go) | |
7006 | fixup_go_packaging (cu); | |
7007 | ||
7008 | /* Now that we have processed all the DIEs in the CU, all the types | |
7009 | should be complete, and it should now be safe to compute all of the | |
7010 | physnames. */ | |
7011 | compute_delayed_physnames (cu); | |
7012 | do_cleanups (delayed_list_cleanup); | |
7013 | ||
7014 | /* TUs share symbol tables. | |
7015 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7016 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7017 | this TU's symbols to the existing symtab. */ | |
f4dc4d17 | 7018 | if (per_cu->s.type_unit_group->primary_symtab == NULL) |
45cfd468 | 7019 | { |
f4dc4d17 DE |
7020 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
7021 | per_cu->s.type_unit_group->primary_symtab = symtab; | |
7022 | ||
7023 | if (symtab != NULL) | |
7024 | { | |
7025 | /* Set symtab language to language from DW_AT_language. If the | |
7026 | compilation is from a C file generated by language preprocessors, | |
7027 | do not set the language if it was already deduced by | |
7028 | start_subfile. */ | |
7029 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7030 | symtab->language = cu->language; | |
7031 | } | |
7032 | } | |
7033 | else | |
7034 | { | |
7035 | augment_type_symtab (objfile, | |
7036 | per_cu->s.type_unit_group->primary_symtab); | |
7037 | symtab = per_cu->s.type_unit_group->primary_symtab; | |
7038 | } | |
7039 | ||
7040 | if (dwarf2_per_objfile->using_index) | |
7041 | per_cu->v.quick->symtab = symtab; | |
7042 | else | |
7043 | { | |
7044 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7045 | pst->symtab = symtab; | |
7046 | pst->readin = 1; | |
45cfd468 | 7047 | } |
f4dc4d17 DE |
7048 | |
7049 | do_cleanups (back_to); | |
c906108c SS |
7050 | } |
7051 | ||
95554aad TT |
7052 | /* Process an imported unit DIE. */ |
7053 | ||
7054 | static void | |
7055 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
7056 | { | |
7057 | struct attribute *attr; | |
7058 | ||
f4dc4d17 DE |
7059 | /* For now we don't handle imported units in type units. */ |
7060 | if (cu->per_cu->is_debug_types) | |
7061 | { | |
7062 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7063 | " supported in type units [in module %s]"), | |
7064 | cu->objfile->name); | |
7065 | } | |
7066 | ||
95554aad TT |
7067 | attr = dwarf2_attr (die, DW_AT_import, cu); |
7068 | if (attr != NULL) | |
7069 | { | |
7070 | struct dwarf2_per_cu_data *per_cu; | |
7071 | struct symtab *imported_symtab; | |
7072 | sect_offset offset; | |
36586728 | 7073 | int is_dwz; |
95554aad TT |
7074 | |
7075 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
7076 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
7077 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad TT |
7078 | |
7079 | /* Queue the unit, if needed. */ | |
7080 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) | |
7081 | load_full_comp_unit (per_cu, cu->language); | |
7082 | ||
f4dc4d17 | 7083 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs, |
95554aad TT |
7084 | per_cu); |
7085 | } | |
7086 | } | |
7087 | ||
c906108c SS |
7088 | /* Process a die and its children. */ |
7089 | ||
7090 | static void | |
e7c27a73 | 7091 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
7092 | { |
7093 | switch (die->tag) | |
7094 | { | |
7095 | case DW_TAG_padding: | |
7096 | break; | |
7097 | case DW_TAG_compile_unit: | |
95554aad | 7098 | case DW_TAG_partial_unit: |
e7c27a73 | 7099 | read_file_scope (die, cu); |
c906108c | 7100 | break; |
348e048f DE |
7101 | case DW_TAG_type_unit: |
7102 | read_type_unit_scope (die, cu); | |
7103 | break; | |
c906108c | 7104 | case DW_TAG_subprogram: |
c906108c | 7105 | case DW_TAG_inlined_subroutine: |
edb3359d | 7106 | read_func_scope (die, cu); |
c906108c SS |
7107 | break; |
7108 | case DW_TAG_lexical_block: | |
14898363 L |
7109 | case DW_TAG_try_block: |
7110 | case DW_TAG_catch_block: | |
e7c27a73 | 7111 | read_lexical_block_scope (die, cu); |
c906108c | 7112 | break; |
96408a79 SA |
7113 | case DW_TAG_GNU_call_site: |
7114 | read_call_site_scope (die, cu); | |
7115 | break; | |
c906108c | 7116 | case DW_TAG_class_type: |
680b30c7 | 7117 | case DW_TAG_interface_type: |
c906108c SS |
7118 | case DW_TAG_structure_type: |
7119 | case DW_TAG_union_type: | |
134d01f1 | 7120 | process_structure_scope (die, cu); |
c906108c SS |
7121 | break; |
7122 | case DW_TAG_enumeration_type: | |
134d01f1 | 7123 | process_enumeration_scope (die, cu); |
c906108c | 7124 | break; |
134d01f1 | 7125 | |
f792889a DJ |
7126 | /* These dies have a type, but processing them does not create |
7127 | a symbol or recurse to process the children. Therefore we can | |
7128 | read them on-demand through read_type_die. */ | |
c906108c | 7129 | case DW_TAG_subroutine_type: |
72019c9c | 7130 | case DW_TAG_set_type: |
c906108c | 7131 | case DW_TAG_array_type: |
c906108c | 7132 | case DW_TAG_pointer_type: |
c906108c | 7133 | case DW_TAG_ptr_to_member_type: |
c906108c | 7134 | case DW_TAG_reference_type: |
c906108c | 7135 | case DW_TAG_string_type: |
c906108c | 7136 | break; |
134d01f1 | 7137 | |
c906108c | 7138 | case DW_TAG_base_type: |
a02abb62 | 7139 | case DW_TAG_subrange_type: |
cb249c71 | 7140 | case DW_TAG_typedef: |
134d01f1 DJ |
7141 | /* Add a typedef symbol for the type definition, if it has a |
7142 | DW_AT_name. */ | |
f792889a | 7143 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 7144 | break; |
c906108c | 7145 | case DW_TAG_common_block: |
e7c27a73 | 7146 | read_common_block (die, cu); |
c906108c SS |
7147 | break; |
7148 | case DW_TAG_common_inclusion: | |
7149 | break; | |
d9fa45fe | 7150 | case DW_TAG_namespace: |
63d06c5c | 7151 | processing_has_namespace_info = 1; |
e7c27a73 | 7152 | read_namespace (die, cu); |
d9fa45fe | 7153 | break; |
5d7cb8df | 7154 | case DW_TAG_module: |
f55ee35c | 7155 | processing_has_namespace_info = 1; |
5d7cb8df JK |
7156 | read_module (die, cu); |
7157 | break; | |
d9fa45fe DC |
7158 | case DW_TAG_imported_declaration: |
7159 | case DW_TAG_imported_module: | |
63d06c5c | 7160 | processing_has_namespace_info = 1; |
27aa8d6a SW |
7161 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
7162 | || cu->language != language_fortran)) | |
7163 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
7164 | dwarf_tag_name (die->tag)); | |
7165 | read_import_statement (die, cu); | |
d9fa45fe | 7166 | break; |
95554aad TT |
7167 | |
7168 | case DW_TAG_imported_unit: | |
7169 | process_imported_unit_die (die, cu); | |
7170 | break; | |
7171 | ||
c906108c | 7172 | default: |
e7c27a73 | 7173 | new_symbol (die, NULL, cu); |
c906108c SS |
7174 | break; |
7175 | } | |
7176 | } | |
7177 | ||
94af9270 KS |
7178 | /* A helper function for dwarf2_compute_name which determines whether DIE |
7179 | needs to have the name of the scope prepended to the name listed in the | |
7180 | die. */ | |
7181 | ||
7182 | static int | |
7183 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
7184 | { | |
1c809c68 TT |
7185 | struct attribute *attr; |
7186 | ||
94af9270 KS |
7187 | switch (die->tag) |
7188 | { | |
7189 | case DW_TAG_namespace: | |
7190 | case DW_TAG_typedef: | |
7191 | case DW_TAG_class_type: | |
7192 | case DW_TAG_interface_type: | |
7193 | case DW_TAG_structure_type: | |
7194 | case DW_TAG_union_type: | |
7195 | case DW_TAG_enumeration_type: | |
7196 | case DW_TAG_enumerator: | |
7197 | case DW_TAG_subprogram: | |
7198 | case DW_TAG_member: | |
7199 | return 1; | |
7200 | ||
7201 | case DW_TAG_variable: | |
c2b0a229 | 7202 | case DW_TAG_constant: |
94af9270 KS |
7203 | /* We only need to prefix "globally" visible variables. These include |
7204 | any variable marked with DW_AT_external or any variable that | |
7205 | lives in a namespace. [Variables in anonymous namespaces | |
7206 | require prefixing, but they are not DW_AT_external.] */ | |
7207 | ||
7208 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
7209 | { | |
7210 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 7211 | |
94af9270 KS |
7212 | return die_needs_namespace (die_specification (die, &spec_cu), |
7213 | spec_cu); | |
7214 | } | |
7215 | ||
1c809c68 | 7216 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
7217 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
7218 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
7219 | return 0; |
7220 | /* A variable in a lexical block of some kind does not need a | |
7221 | namespace, even though in C++ such variables may be external | |
7222 | and have a mangled name. */ | |
7223 | if (die->parent->tag == DW_TAG_lexical_block | |
7224 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
7225 | || die->parent->tag == DW_TAG_catch_block |
7226 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
7227 | return 0; |
7228 | return 1; | |
94af9270 KS |
7229 | |
7230 | default: | |
7231 | return 0; | |
7232 | } | |
7233 | } | |
7234 | ||
98bfdba5 PA |
7235 | /* Retrieve the last character from a mem_file. */ |
7236 | ||
7237 | static void | |
7238 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
7239 | { | |
7240 | char *last_char_p = (char *) object; | |
7241 | ||
7242 | if (length > 0) | |
7243 | *last_char_p = buffer[length - 1]; | |
7244 | } | |
7245 | ||
94af9270 | 7246 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
7247 | compute the physname for the object, which include a method's: |
7248 | - formal parameters (C++/Java), | |
7249 | - receiver type (Go), | |
7250 | - return type (Java). | |
7251 | ||
7252 | The term "physname" is a bit confusing. | |
7253 | For C++, for example, it is the demangled name. | |
7254 | For Go, for example, it's the mangled name. | |
94af9270 | 7255 | |
af6b7be1 JB |
7256 | For Ada, return the DIE's linkage name rather than the fully qualified |
7257 | name. PHYSNAME is ignored.. | |
7258 | ||
94af9270 KS |
7259 | The result is allocated on the objfile_obstack and canonicalized. */ |
7260 | ||
7261 | static const char * | |
7262 | dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu, | |
7263 | int physname) | |
7264 | { | |
bb5ed363 DE |
7265 | struct objfile *objfile = cu->objfile; |
7266 | ||
94af9270 KS |
7267 | if (name == NULL) |
7268 | name = dwarf2_name (die, cu); | |
7269 | ||
f55ee35c JK |
7270 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
7271 | compute it by typename_concat inside GDB. */ | |
7272 | if (cu->language == language_ada | |
7273 | || (cu->language == language_fortran && physname)) | |
7274 | { | |
7275 | /* For Ada unit, we prefer the linkage name over the name, as | |
7276 | the former contains the exported name, which the user expects | |
7277 | to be able to reference. Ideally, we want the user to be able | |
7278 | to reference this entity using either natural or linkage name, | |
7279 | but we haven't started looking at this enhancement yet. */ | |
7280 | struct attribute *attr; | |
7281 | ||
7282 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7283 | if (attr == NULL) | |
7284 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7285 | if (attr && DW_STRING (attr)) | |
7286 | return DW_STRING (attr); | |
7287 | } | |
7288 | ||
94af9270 KS |
7289 | /* These are the only languages we know how to qualify names in. */ |
7290 | if (name != NULL | |
f55ee35c JK |
7291 | && (cu->language == language_cplus || cu->language == language_java |
7292 | || cu->language == language_fortran)) | |
94af9270 KS |
7293 | { |
7294 | if (die_needs_namespace (die, cu)) | |
7295 | { | |
7296 | long length; | |
0d5cff50 | 7297 | const char *prefix; |
94af9270 KS |
7298 | struct ui_file *buf; |
7299 | ||
7300 | prefix = determine_prefix (die, cu); | |
7301 | buf = mem_fileopen (); | |
7302 | if (*prefix != '\0') | |
7303 | { | |
f55ee35c JK |
7304 | char *prefixed_name = typename_concat (NULL, prefix, name, |
7305 | physname, cu); | |
9a619af0 | 7306 | |
94af9270 KS |
7307 | fputs_unfiltered (prefixed_name, buf); |
7308 | xfree (prefixed_name); | |
7309 | } | |
7310 | else | |
62d5b8da | 7311 | fputs_unfiltered (name, buf); |
94af9270 | 7312 | |
98bfdba5 PA |
7313 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
7314 | as children with DW_TAG_template_type_param or | |
7315 | DW_TAG_value_type_param. If the latter, add them to the name | |
7316 | here. If the name already has template parameters, then | |
7317 | skip this step; some versions of GCC emit both, and | |
7318 | it is more efficient to use the pre-computed name. | |
7319 | ||
7320 | Something to keep in mind about this process: it is very | |
7321 | unlikely, or in some cases downright impossible, to produce | |
7322 | something that will match the mangled name of a function. | |
7323 | If the definition of the function has the same debug info, | |
7324 | we should be able to match up with it anyway. But fallbacks | |
7325 | using the minimal symbol, for instance to find a method | |
7326 | implemented in a stripped copy of libstdc++, will not work. | |
7327 | If we do not have debug info for the definition, we will have to | |
7328 | match them up some other way. | |
7329 | ||
7330 | When we do name matching there is a related problem with function | |
7331 | templates; two instantiated function templates are allowed to | |
7332 | differ only by their return types, which we do not add here. */ | |
7333 | ||
7334 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
7335 | { | |
7336 | struct attribute *attr; | |
7337 | struct die_info *child; | |
7338 | int first = 1; | |
7339 | ||
7340 | die->building_fullname = 1; | |
7341 | ||
7342 | for (child = die->child; child != NULL; child = child->sibling) | |
7343 | { | |
7344 | struct type *type; | |
12df843f | 7345 | LONGEST value; |
98bfdba5 PA |
7346 | gdb_byte *bytes; |
7347 | struct dwarf2_locexpr_baton *baton; | |
7348 | struct value *v; | |
7349 | ||
7350 | if (child->tag != DW_TAG_template_type_param | |
7351 | && child->tag != DW_TAG_template_value_param) | |
7352 | continue; | |
7353 | ||
7354 | if (first) | |
7355 | { | |
7356 | fputs_unfiltered ("<", buf); | |
7357 | first = 0; | |
7358 | } | |
7359 | else | |
7360 | fputs_unfiltered (", ", buf); | |
7361 | ||
7362 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
7363 | if (attr == NULL) | |
7364 | { | |
7365 | complaint (&symfile_complaints, | |
7366 | _("template parameter missing DW_AT_type")); | |
7367 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
7368 | continue; | |
7369 | } | |
7370 | type = die_type (child, cu); | |
7371 | ||
7372 | if (child->tag == DW_TAG_template_type_param) | |
7373 | { | |
79d43c61 | 7374 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
7375 | continue; |
7376 | } | |
7377 | ||
7378 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
7379 | if (attr == NULL) | |
7380 | { | |
7381 | complaint (&symfile_complaints, | |
3e43a32a MS |
7382 | _("template parameter missing " |
7383 | "DW_AT_const_value")); | |
98bfdba5 PA |
7384 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
7385 | continue; | |
7386 | } | |
7387 | ||
7388 | dwarf2_const_value_attr (attr, type, name, | |
7389 | &cu->comp_unit_obstack, cu, | |
7390 | &value, &bytes, &baton); | |
7391 | ||
7392 | if (TYPE_NOSIGN (type)) | |
7393 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
7394 | changed, this can use value_print instead. */ | |
7395 | c_printchar (value, type, buf); | |
7396 | else | |
7397 | { | |
7398 | struct value_print_options opts; | |
7399 | ||
7400 | if (baton != NULL) | |
7401 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
7402 | baton->data, | |
7403 | baton->size, | |
7404 | baton->per_cu); | |
7405 | else if (bytes != NULL) | |
7406 | { | |
7407 | v = allocate_value (type); | |
7408 | memcpy (value_contents_writeable (v), bytes, | |
7409 | TYPE_LENGTH (type)); | |
7410 | } | |
7411 | else | |
7412 | v = value_from_longest (type, value); | |
7413 | ||
3e43a32a MS |
7414 | /* Specify decimal so that we do not depend on |
7415 | the radix. */ | |
98bfdba5 PA |
7416 | get_formatted_print_options (&opts, 'd'); |
7417 | opts.raw = 1; | |
7418 | value_print (v, buf, &opts); | |
7419 | release_value (v); | |
7420 | value_free (v); | |
7421 | } | |
7422 | } | |
7423 | ||
7424 | die->building_fullname = 0; | |
7425 | ||
7426 | if (!first) | |
7427 | { | |
7428 | /* Close the argument list, with a space if necessary | |
7429 | (nested templates). */ | |
7430 | char last_char = '\0'; | |
7431 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
7432 | if (last_char == '>') | |
7433 | fputs_unfiltered (" >", buf); | |
7434 | else | |
7435 | fputs_unfiltered (">", buf); | |
7436 | } | |
7437 | } | |
7438 | ||
94af9270 KS |
7439 | /* For Java and C++ methods, append formal parameter type |
7440 | information, if PHYSNAME. */ | |
6e70227d | 7441 | |
94af9270 KS |
7442 | if (physname && die->tag == DW_TAG_subprogram |
7443 | && (cu->language == language_cplus | |
7444 | || cu->language == language_java)) | |
7445 | { | |
7446 | struct type *type = read_type_die (die, cu); | |
7447 | ||
79d43c61 TT |
7448 | c_type_print_args (type, buf, 1, cu->language, |
7449 | &type_print_raw_options); | |
94af9270 KS |
7450 | |
7451 | if (cu->language == language_java) | |
7452 | { | |
7453 | /* For java, we must append the return type to method | |
0963b4bd | 7454 | names. */ |
94af9270 KS |
7455 | if (die->tag == DW_TAG_subprogram) |
7456 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 7457 | 0, 0, &type_print_raw_options); |
94af9270 KS |
7458 | } |
7459 | else if (cu->language == language_cplus) | |
7460 | { | |
60430eff DJ |
7461 | /* Assume that an artificial first parameter is |
7462 | "this", but do not crash if it is not. RealView | |
7463 | marks unnamed (and thus unused) parameters as | |
7464 | artificial; there is no way to differentiate | |
7465 | the two cases. */ | |
94af9270 KS |
7466 | if (TYPE_NFIELDS (type) > 0 |
7467 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 7468 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
7469 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
7470 | 0)))) | |
94af9270 KS |
7471 | fputs_unfiltered (" const", buf); |
7472 | } | |
7473 | } | |
7474 | ||
bb5ed363 | 7475 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
7476 | &length); |
7477 | ui_file_delete (buf); | |
7478 | ||
7479 | if (cu->language == language_cplus) | |
7480 | { | |
7481 | char *cname | |
7482 | = dwarf2_canonicalize_name (name, cu, | |
bb5ed363 | 7483 | &objfile->objfile_obstack); |
9a619af0 | 7484 | |
94af9270 KS |
7485 | if (cname != NULL) |
7486 | name = cname; | |
7487 | } | |
7488 | } | |
7489 | } | |
7490 | ||
7491 | return name; | |
7492 | } | |
7493 | ||
0114d602 DJ |
7494 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
7495 | If scope qualifiers are appropriate they will be added. The result | |
7496 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
7497 | not have a name. NAME may either be from a previous call to |
7498 | dwarf2_name or NULL. | |
7499 | ||
0963b4bd | 7500 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
7501 | |
7502 | static const char * | |
94af9270 | 7503 | dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 7504 | { |
94af9270 KS |
7505 | return dwarf2_compute_name (name, die, cu, 0); |
7506 | } | |
0114d602 | 7507 | |
94af9270 KS |
7508 | /* Construct a physname for the given DIE in CU. NAME may either be |
7509 | from a previous call to dwarf2_name or NULL. The result will be | |
7510 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
7511 | name. | |
0114d602 | 7512 | |
94af9270 | 7513 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 7514 | |
94af9270 KS |
7515 | static const char * |
7516 | dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu) | |
7517 | { | |
bb5ed363 | 7518 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
7519 | struct attribute *attr; |
7520 | const char *retval, *mangled = NULL, *canon = NULL; | |
7521 | struct cleanup *back_to; | |
7522 | int need_copy = 1; | |
7523 | ||
7524 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
7525 | on its own. */ | |
7526 | if (!die_needs_namespace (die, cu)) | |
7527 | return dwarf2_compute_name (name, die, cu, 1); | |
7528 | ||
7529 | back_to = make_cleanup (null_cleanup, NULL); | |
7530 | ||
7531 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7532 | if (!attr) | |
7533 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7534 | ||
7535 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
7536 | has computed. */ | |
7537 | if (attr && DW_STRING (attr)) | |
7538 | { | |
7539 | char *demangled; | |
7540 | ||
7541 | mangled = DW_STRING (attr); | |
7542 | ||
7543 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
7544 | type. It is easier for GDB users to search for such functions as | |
7545 | `name(params)' than `long name(params)'. In such case the minimal | |
7546 | symbol names do not match the full symbol names but for template | |
7547 | functions there is never a need to look up their definition from their | |
7548 | declaration so the only disadvantage remains the minimal symbol | |
7549 | variant `long name(params)' does not have the proper inferior type. | |
7550 | */ | |
7551 | ||
a766d390 DE |
7552 | if (cu->language == language_go) |
7553 | { | |
7554 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
7555 | new_symbol_full assumes we return the mangled name. | |
7556 | This just undoes that lie until things are cleaned up. */ | |
7557 | demangled = NULL; | |
7558 | } | |
7559 | else | |
7560 | { | |
7561 | demangled = cplus_demangle (mangled, | |
7562 | (DMGL_PARAMS | DMGL_ANSI | |
7563 | | (cu->language == language_java | |
7564 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
7565 | : DMGL_RET_DROP))); | |
7566 | } | |
900e11f9 JK |
7567 | if (demangled) |
7568 | { | |
7569 | make_cleanup (xfree, demangled); | |
7570 | canon = demangled; | |
7571 | } | |
7572 | else | |
7573 | { | |
7574 | canon = mangled; | |
7575 | need_copy = 0; | |
7576 | } | |
7577 | } | |
7578 | ||
7579 | if (canon == NULL || check_physname) | |
7580 | { | |
7581 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
7582 | ||
7583 | if (canon != NULL && strcmp (physname, canon) != 0) | |
7584 | { | |
7585 | /* It may not mean a bug in GDB. The compiler could also | |
7586 | compute DW_AT_linkage_name incorrectly. But in such case | |
7587 | GDB would need to be bug-to-bug compatible. */ | |
7588 | ||
7589 | complaint (&symfile_complaints, | |
7590 | _("Computed physname <%s> does not match demangled <%s> " | |
7591 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7592 | physname, canon, mangled, die->offset.sect_off, objfile->name); |
900e11f9 JK |
7593 | |
7594 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
7595 | is available here - over computed PHYSNAME. It is safer | |
7596 | against both buggy GDB and buggy compilers. */ | |
7597 | ||
7598 | retval = canon; | |
7599 | } | |
7600 | else | |
7601 | { | |
7602 | retval = physname; | |
7603 | need_copy = 0; | |
7604 | } | |
7605 | } | |
7606 | else | |
7607 | retval = canon; | |
7608 | ||
7609 | if (need_copy) | |
7610 | retval = obsavestring (retval, strlen (retval), | |
bb5ed363 | 7611 | &objfile->objfile_obstack); |
900e11f9 JK |
7612 | |
7613 | do_cleanups (back_to); | |
7614 | return retval; | |
0114d602 DJ |
7615 | } |
7616 | ||
27aa8d6a SW |
7617 | /* Read the import statement specified by the given die and record it. */ |
7618 | ||
7619 | static void | |
7620 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
7621 | { | |
bb5ed363 | 7622 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 7623 | struct attribute *import_attr; |
32019081 | 7624 | struct die_info *imported_die, *child_die; |
de4affc9 | 7625 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 7626 | const char *imported_name; |
794684b6 | 7627 | const char *imported_name_prefix; |
13387711 SW |
7628 | const char *canonical_name; |
7629 | const char *import_alias; | |
7630 | const char *imported_declaration = NULL; | |
794684b6 | 7631 | const char *import_prefix; |
32019081 JK |
7632 | VEC (const_char_ptr) *excludes = NULL; |
7633 | struct cleanup *cleanups; | |
13387711 SW |
7634 | |
7635 | char *temp; | |
27aa8d6a SW |
7636 | |
7637 | import_attr = dwarf2_attr (die, DW_AT_import, cu); | |
7638 | if (import_attr == NULL) | |
7639 | { | |
7640 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7641 | dwarf_tag_name (die->tag)); | |
7642 | return; | |
7643 | } | |
7644 | ||
de4affc9 CC |
7645 | imported_cu = cu; |
7646 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
7647 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
7648 | if (imported_name == NULL) |
7649 | { | |
7650 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
7651 | ||
7652 | The import in the following code: | |
7653 | namespace A | |
7654 | { | |
7655 | typedef int B; | |
7656 | } | |
7657 | ||
7658 | int main () | |
7659 | { | |
7660 | using A::B; | |
7661 | B b; | |
7662 | return b; | |
7663 | } | |
7664 | ||
7665 | ... | |
7666 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
7667 | <52> DW_AT_decl_file : 1 | |
7668 | <53> DW_AT_decl_line : 6 | |
7669 | <54> DW_AT_import : <0x75> | |
7670 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
7671 | <59> DW_AT_name : B | |
7672 | <5b> DW_AT_decl_file : 1 | |
7673 | <5c> DW_AT_decl_line : 2 | |
7674 | <5d> DW_AT_type : <0x6e> | |
7675 | ... | |
7676 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
7677 | <76> DW_AT_byte_size : 4 | |
7678 | <77> DW_AT_encoding : 5 (signed) | |
7679 | ||
7680 | imports the wrong die ( 0x75 instead of 0x58 ). | |
7681 | This case will be ignored until the gcc bug is fixed. */ | |
7682 | return; | |
7683 | } | |
7684 | ||
82856980 SW |
7685 | /* Figure out the local name after import. */ |
7686 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 7687 | |
794684b6 SW |
7688 | /* Figure out where the statement is being imported to. */ |
7689 | import_prefix = determine_prefix (die, cu); | |
7690 | ||
7691 | /* Figure out what the scope of the imported die is and prepend it | |
7692 | to the name of the imported die. */ | |
de4affc9 | 7693 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 7694 | |
f55ee35c JK |
7695 | if (imported_die->tag != DW_TAG_namespace |
7696 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 7697 | { |
13387711 SW |
7698 | imported_declaration = imported_name; |
7699 | canonical_name = imported_name_prefix; | |
794684b6 | 7700 | } |
13387711 | 7701 | else if (strlen (imported_name_prefix) > 0) |
794684b6 | 7702 | { |
13387711 SW |
7703 | temp = alloca (strlen (imported_name_prefix) |
7704 | + 2 + strlen (imported_name) + 1); | |
7705 | strcpy (temp, imported_name_prefix); | |
7706 | strcat (temp, "::"); | |
7707 | strcat (temp, imported_name); | |
7708 | canonical_name = temp; | |
794684b6 | 7709 | } |
13387711 SW |
7710 | else |
7711 | canonical_name = imported_name; | |
794684b6 | 7712 | |
32019081 JK |
7713 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
7714 | ||
7715 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
7716 | for (child_die = die->child; child_die && child_die->tag; | |
7717 | child_die = sibling_die (child_die)) | |
7718 | { | |
7719 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
7720 | represented by an imported module entry with an import attribute | |
7721 | referring to the module and owned entries corresponding to those | |
7722 | entities that are renamed as part of being imported. */ | |
7723 | ||
7724 | if (child_die->tag != DW_TAG_imported_declaration) | |
7725 | { | |
7726 | complaint (&symfile_complaints, | |
7727 | _("child DW_TAG_imported_declaration expected " | |
7728 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7729 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7730 | continue; |
7731 | } | |
7732 | ||
7733 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
7734 | if (import_attr == NULL) | |
7735 | { | |
7736 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7737 | dwarf_tag_name (child_die->tag)); | |
7738 | continue; | |
7739 | } | |
7740 | ||
7741 | imported_cu = cu; | |
7742 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
7743 | &imported_cu); | |
7744 | imported_name = dwarf2_name (imported_die, imported_cu); | |
7745 | if (imported_name == NULL) | |
7746 | { | |
7747 | complaint (&symfile_complaints, | |
7748 | _("child DW_TAG_imported_declaration has unknown " | |
7749 | "imported name - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7750 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7751 | continue; |
7752 | } | |
7753 | ||
7754 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
7755 | ||
7756 | process_die (child_die, cu); | |
7757 | } | |
7758 | ||
c0cc3a76 SW |
7759 | cp_add_using_directive (import_prefix, |
7760 | canonical_name, | |
7761 | import_alias, | |
13387711 | 7762 | imported_declaration, |
32019081 | 7763 | excludes, |
bb5ed363 | 7764 | &objfile->objfile_obstack); |
32019081 JK |
7765 | |
7766 | do_cleanups (cleanups); | |
27aa8d6a SW |
7767 | } |
7768 | ||
f4dc4d17 | 7769 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 7770 | |
cb1df416 DJ |
7771 | static void |
7772 | free_cu_line_header (void *arg) | |
7773 | { | |
7774 | struct dwarf2_cu *cu = arg; | |
7775 | ||
7776 | free_line_header (cu->line_header); | |
7777 | cu->line_header = NULL; | |
7778 | } | |
7779 | ||
1b80a9fa JK |
7780 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
7781 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
7782 | this, it was first present in GCC release 4.3.0. */ | |
7783 | ||
7784 | static int | |
7785 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
7786 | { | |
7787 | if (!cu->checked_producer) | |
7788 | check_producer (cu); | |
7789 | ||
7790 | return cu->producer_is_gcc_lt_4_3; | |
7791 | } | |
7792 | ||
9291a0cd TT |
7793 | static void |
7794 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
7795 | char **name, char **comp_dir) | |
7796 | { | |
7797 | struct attribute *attr; | |
7798 | ||
7799 | *name = NULL; | |
7800 | *comp_dir = NULL; | |
7801 | ||
7802 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
7803 | is not a source language identifier. */ | |
7804 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
7805 | if (attr) | |
7806 | { | |
7807 | *name = DW_STRING (attr); | |
7808 | } | |
7809 | ||
7810 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
7811 | if (attr) | |
7812 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
7813 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
7814 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd TT |
7815 | { |
7816 | *comp_dir = ldirname (*name); | |
7817 | if (*comp_dir != NULL) | |
7818 | make_cleanup (xfree, *comp_dir); | |
7819 | } | |
7820 | if (*comp_dir != NULL) | |
7821 | { | |
7822 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
7823 | directory, get rid of it. */ | |
7824 | char *cp = strchr (*comp_dir, ':'); | |
7825 | ||
7826 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
7827 | *comp_dir = cp + 1; | |
7828 | } | |
7829 | ||
7830 | if (*name == NULL) | |
7831 | *name = "<unknown>"; | |
7832 | } | |
7833 | ||
f4dc4d17 DE |
7834 | /* Handle DW_AT_stmt_list for a compilation unit. |
7835 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
7836 | COMP_DIR is the compilation directory. |
7837 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
7838 | |
7839 | static void | |
7840 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
f4dc4d17 | 7841 | const char *comp_dir) |
2ab95328 TT |
7842 | { |
7843 | struct attribute *attr; | |
2ab95328 | 7844 | |
f4dc4d17 DE |
7845 | gdb_assert (! cu->per_cu->is_debug_types); |
7846 | ||
2ab95328 TT |
7847 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
7848 | if (attr) | |
7849 | { | |
7850 | unsigned int line_offset = DW_UNSND (attr); | |
7851 | struct line_header *line_header | |
3019eac3 | 7852 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
7853 | |
7854 | if (line_header) | |
dee91e82 DE |
7855 | { |
7856 | cu->line_header = line_header; | |
7857 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 7858 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 7859 | } |
2ab95328 TT |
7860 | } |
7861 | } | |
7862 | ||
95554aad | 7863 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 7864 | |
c906108c | 7865 | static void |
e7c27a73 | 7866 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 7867 | { |
dee91e82 | 7868 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 7869 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 7870 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
7871 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
7872 | struct attribute *attr; | |
e1024ff1 | 7873 | char *name = NULL; |
c906108c SS |
7874 | char *comp_dir = NULL; |
7875 | struct die_info *child_die; | |
7876 | bfd *abfd = objfile->obfd; | |
e142c38c | 7877 | CORE_ADDR baseaddr; |
6e70227d | 7878 | |
e142c38c | 7879 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 7880 | |
fae299cd | 7881 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
7882 | |
7883 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
7884 | from finish_block. */ | |
2acceee2 | 7885 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
7886 | lowpc = highpc; |
7887 | lowpc += baseaddr; | |
7888 | highpc += baseaddr; | |
7889 | ||
9291a0cd | 7890 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 7891 | |
95554aad | 7892 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 7893 | |
f4b8a18d KW |
7894 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
7895 | standardised yet. As a workaround for the language detection we fall | |
7896 | back to the DW_AT_producer string. */ | |
7897 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
7898 | cu->language = language_opencl; | |
7899 | ||
3019eac3 DE |
7900 | /* Similar hack for Go. */ |
7901 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
7902 | set_cu_language (DW_LANG_Go, cu); | |
7903 | ||
f4dc4d17 | 7904 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
7905 | |
7906 | /* Decode line number information if present. We do this before | |
7907 | processing child DIEs, so that the line header table is available | |
7908 | for DW_AT_decl_file. */ | |
f4dc4d17 | 7909 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
7910 | |
7911 | /* Process all dies in compilation unit. */ | |
7912 | if (die->child != NULL) | |
7913 | { | |
7914 | child_die = die->child; | |
7915 | while (child_die && child_die->tag) | |
7916 | { | |
7917 | process_die (child_die, cu); | |
7918 | child_die = sibling_die (child_die); | |
7919 | } | |
7920 | } | |
7921 | ||
7922 | /* Decode macro information, if present. Dwarf 2 macro information | |
7923 | refers to information in the line number info statement program | |
7924 | header, so we can only read it if we've read the header | |
7925 | successfully. */ | |
7926 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
7927 | if (attr && cu->line_header) | |
7928 | { | |
7929 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
7930 | complaint (&symfile_complaints, | |
7931 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
7932 | ||
09262596 | 7933 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
7934 | } |
7935 | else | |
7936 | { | |
7937 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
7938 | if (attr && cu->line_header) | |
7939 | { | |
7940 | unsigned int macro_offset = DW_UNSND (attr); | |
7941 | ||
09262596 | 7942 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
7943 | } |
7944 | } | |
7945 | ||
7946 | do_cleanups (back_to); | |
7947 | } | |
7948 | ||
f4dc4d17 DE |
7949 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
7950 | Create the set of symtabs used by this TU, or if this TU is sharing | |
7951 | symtabs with another TU and the symtabs have already been created | |
7952 | then restore those symtabs in the line header. | |
7953 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
7954 | |
7955 | static void | |
f4dc4d17 | 7956 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 7957 | { |
f4dc4d17 DE |
7958 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7959 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
7960 | struct type_unit_group *tu_group; | |
7961 | int first_time; | |
7962 | struct line_header *lh; | |
3019eac3 | 7963 | struct attribute *attr; |
f4dc4d17 | 7964 | unsigned int i, line_offset; |
3019eac3 | 7965 | |
f4dc4d17 | 7966 | gdb_assert (per_cu->is_debug_types); |
3019eac3 | 7967 | |
f4dc4d17 | 7968 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 7969 | |
f4dc4d17 DE |
7970 | /* If we're using .gdb_index (includes -readnow) then |
7971 | per_cu->s.type_unit_group may not have been set up yet. */ | |
7972 | if (per_cu->s.type_unit_group == NULL) | |
094b34ac | 7973 | per_cu->s.type_unit_group = get_type_unit_group (cu, attr); |
f4dc4d17 DE |
7974 | tu_group = per_cu->s.type_unit_group; |
7975 | ||
7976 | /* If we've already processed this stmt_list there's no real need to | |
7977 | do it again, we could fake it and just recreate the part we need | |
7978 | (file name,index -> symtab mapping). If data shows this optimization | |
7979 | is useful we can do it then. */ | |
7980 | first_time = tu_group->primary_symtab == NULL; | |
7981 | ||
7982 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
7983 | debug info. */ | |
7984 | lh = NULL; | |
7985 | if (attr != NULL) | |
3019eac3 | 7986 | { |
f4dc4d17 DE |
7987 | line_offset = DW_UNSND (attr); |
7988 | lh = dwarf_decode_line_header (line_offset, cu); | |
7989 | } | |
7990 | if (lh == NULL) | |
7991 | { | |
7992 | if (first_time) | |
7993 | dwarf2_start_symtab (cu, "", NULL, 0); | |
7994 | else | |
7995 | { | |
7996 | gdb_assert (tu_group->symtabs == NULL); | |
7997 | restart_symtab (0); | |
7998 | } | |
7999 | /* Note: The primary symtab will get allocated at the end. */ | |
8000 | return; | |
3019eac3 DE |
8001 | } |
8002 | ||
f4dc4d17 DE |
8003 | cu->line_header = lh; |
8004 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 8005 | |
f4dc4d17 DE |
8006 | if (first_time) |
8007 | { | |
8008 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 8009 | |
f4dc4d17 DE |
8010 | tu_group->num_symtabs = lh->num_file_names; |
8011 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 8012 | |
f4dc4d17 DE |
8013 | for (i = 0; i < lh->num_file_names; ++i) |
8014 | { | |
8015 | char *dir = NULL; | |
8016 | struct file_entry *fe = &lh->file_names[i]; | |
3019eac3 | 8017 | |
f4dc4d17 DE |
8018 | if (fe->dir_index) |
8019 | dir = lh->include_dirs[fe->dir_index - 1]; | |
8020 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 8021 | |
f4dc4d17 DE |
8022 | /* Note: We don't have to watch for the main subfile here, type units |
8023 | don't have DW_AT_name. */ | |
3019eac3 | 8024 | |
f4dc4d17 DE |
8025 | if (current_subfile->symtab == NULL) |
8026 | { | |
8027 | /* NOTE: start_subfile will recognize when it's been passed | |
8028 | a file it has already seen. So we can't assume there's a | |
8029 | simple mapping from lh->file_names to subfiles, | |
8030 | lh->file_names may contain dups. */ | |
8031 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
8032 | objfile); | |
8033 | } | |
8034 | ||
8035 | fe->symtab = current_subfile->symtab; | |
8036 | tu_group->symtabs[i] = fe->symtab; | |
8037 | } | |
8038 | } | |
8039 | else | |
3019eac3 | 8040 | { |
f4dc4d17 DE |
8041 | restart_symtab (0); |
8042 | ||
8043 | for (i = 0; i < lh->num_file_names; ++i) | |
8044 | { | |
8045 | struct file_entry *fe = &lh->file_names[i]; | |
8046 | ||
8047 | fe->symtab = tu_group->symtabs[i]; | |
8048 | } | |
3019eac3 DE |
8049 | } |
8050 | ||
f4dc4d17 DE |
8051 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
8052 | so they don't have a "real" (so to speak) symtab anyway. | |
8053 | There is later code that will assign the main symtab to all symbols | |
8054 | that don't have one. We need to handle the case of a symbol with a | |
8055 | missing symtab (DW_AT_decl_file) anyway. */ | |
8056 | } | |
3019eac3 | 8057 | |
f4dc4d17 DE |
8058 | /* Process DW_TAG_type_unit. |
8059 | For TUs we want to skip the first top level sibling if it's not the | |
8060 | actual type being defined by this TU. In this case the first top | |
8061 | level sibling is there to provide context only. */ | |
3019eac3 | 8062 | |
f4dc4d17 DE |
8063 | static void |
8064 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
8065 | { | |
8066 | struct die_info *child_die; | |
3019eac3 | 8067 | |
f4dc4d17 DE |
8068 | prepare_one_comp_unit (cu, die, language_minimal); |
8069 | ||
8070 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
8071 | We do this before processing child DIEs, so that the line header table | |
8072 | is available for DW_AT_decl_file. */ | |
8073 | setup_type_unit_groups (die, cu); | |
8074 | ||
8075 | if (die->child != NULL) | |
8076 | { | |
8077 | child_die = die->child; | |
8078 | while (child_die && child_die->tag) | |
8079 | { | |
8080 | process_die (child_die, cu); | |
8081 | child_die = sibling_die (child_die); | |
8082 | } | |
8083 | } | |
3019eac3 DE |
8084 | } |
8085 | \f | |
80626a55 DE |
8086 | /* DWO/DWP files. |
8087 | ||
8088 | http://gcc.gnu.org/wiki/DebugFission | |
8089 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
8090 | ||
8091 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
8092 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
8093 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
8094 | |
8095 | static hashval_t | |
8096 | hash_dwo_file (const void *item) | |
8097 | { | |
8098 | const struct dwo_file *dwo_file = item; | |
8099 | ||
80626a55 | 8100 | return htab_hash_string (dwo_file->name); |
3019eac3 DE |
8101 | } |
8102 | ||
8103 | static int | |
8104 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
8105 | { | |
8106 | const struct dwo_file *lhs = item_lhs; | |
8107 | const struct dwo_file *rhs = item_rhs; | |
8108 | ||
80626a55 | 8109 | return strcmp (lhs->name, rhs->name) == 0; |
3019eac3 DE |
8110 | } |
8111 | ||
8112 | /* Allocate a hash table for DWO files. */ | |
8113 | ||
8114 | static htab_t | |
8115 | allocate_dwo_file_hash_table (void) | |
8116 | { | |
8117 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8118 | ||
8119 | return htab_create_alloc_ex (41, | |
8120 | hash_dwo_file, | |
8121 | eq_dwo_file, | |
8122 | NULL, | |
8123 | &objfile->objfile_obstack, | |
8124 | hashtab_obstack_allocate, | |
8125 | dummy_obstack_deallocate); | |
8126 | } | |
8127 | ||
80626a55 DE |
8128 | /* Lookup DWO file DWO_NAME. */ |
8129 | ||
8130 | static void ** | |
8131 | lookup_dwo_file_slot (const char *dwo_name) | |
8132 | { | |
8133 | struct dwo_file find_entry; | |
8134 | void **slot; | |
8135 | ||
8136 | if (dwarf2_per_objfile->dwo_files == NULL) | |
8137 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
8138 | ||
8139 | memset (&find_entry, 0, sizeof (find_entry)); | |
8140 | find_entry.name = dwo_name; | |
8141 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); | |
8142 | ||
8143 | return slot; | |
8144 | } | |
8145 | ||
3019eac3 DE |
8146 | static hashval_t |
8147 | hash_dwo_unit (const void *item) | |
8148 | { | |
8149 | const struct dwo_unit *dwo_unit = item; | |
8150 | ||
8151 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
8152 | return dwo_unit->signature; | |
8153 | } | |
8154 | ||
8155 | static int | |
8156 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
8157 | { | |
8158 | const struct dwo_unit *lhs = item_lhs; | |
8159 | const struct dwo_unit *rhs = item_rhs; | |
8160 | ||
8161 | /* The signature is assumed to be unique within the DWO file. | |
8162 | So while object file CU dwo_id's always have the value zero, | |
8163 | that's OK, assuming each object file DWO file has only one CU, | |
8164 | and that's the rule for now. */ | |
8165 | return lhs->signature == rhs->signature; | |
8166 | } | |
8167 | ||
8168 | /* Allocate a hash table for DWO CUs,TUs. | |
8169 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
8170 | ||
8171 | static htab_t | |
8172 | allocate_dwo_unit_table (struct objfile *objfile) | |
8173 | { | |
8174 | /* Start out with a pretty small number. | |
8175 | Generally DWO files contain only one CU and maybe some TUs. */ | |
8176 | return htab_create_alloc_ex (3, | |
8177 | hash_dwo_unit, | |
8178 | eq_dwo_unit, | |
8179 | NULL, | |
8180 | &objfile->objfile_obstack, | |
8181 | hashtab_obstack_allocate, | |
8182 | dummy_obstack_deallocate); | |
8183 | } | |
8184 | ||
80626a55 | 8185 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 DE |
8186 | |
8187 | struct create_dwo_info_table_data | |
8188 | { | |
8189 | struct dwo_file *dwo_file; | |
8190 | htab_t cu_htab; | |
8191 | }; | |
8192 | ||
80626a55 | 8193 | /* die_reader_func for create_dwo_debug_info_hash_table. */ |
3019eac3 DE |
8194 | |
8195 | static void | |
80626a55 DE |
8196 | create_dwo_debug_info_hash_table_reader (const struct die_reader_specs *reader, |
8197 | gdb_byte *info_ptr, | |
8198 | struct die_info *comp_unit_die, | |
8199 | int has_children, | |
8200 | void *datap) | |
3019eac3 DE |
8201 | { |
8202 | struct dwarf2_cu *cu = reader->cu; | |
8203 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8204 | sect_offset offset = cu->per_cu->offset; | |
8205 | struct dwarf2_section_info *section = cu->per_cu->info_or_types_section; | |
8206 | struct create_dwo_info_table_data *data = datap; | |
8207 | struct dwo_file *dwo_file = data->dwo_file; | |
8208 | htab_t cu_htab = data->cu_htab; | |
8209 | void **slot; | |
8210 | struct attribute *attr; | |
8211 | struct dwo_unit *dwo_unit; | |
8212 | ||
8213 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
8214 | if (attr == NULL) | |
8215 | { | |
8216 | error (_("Dwarf Error: debug entry at offset 0x%x is missing" | |
8217 | " its dwo_id [in module %s]"), | |
80626a55 | 8218 | offset.sect_off, dwo_file->name); |
3019eac3 DE |
8219 | return; |
8220 | } | |
8221 | ||
8222 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8223 | dwo_unit->dwo_file = dwo_file; | |
8224 | dwo_unit->signature = DW_UNSND (attr); | |
8225 | dwo_unit->info_or_types_section = section; | |
8226 | dwo_unit->offset = offset; | |
8227 | dwo_unit->length = cu->per_cu->length; | |
8228 | ||
8229 | slot = htab_find_slot (cu_htab, dwo_unit, INSERT); | |
8230 | gdb_assert (slot != NULL); | |
8231 | if (*slot != NULL) | |
8232 | { | |
8233 | const struct dwo_unit *dup_dwo_unit = *slot; | |
8234 | ||
8235 | complaint (&symfile_complaints, | |
8236 | _("debug entry at offset 0x%x is duplicate to the entry at" | |
8237 | " offset 0x%x, dwo_id 0x%s [in module %s]"), | |
8238 | offset.sect_off, dup_dwo_unit->offset.sect_off, | |
8239 | phex (dwo_unit->signature, sizeof (dwo_unit->signature)), | |
80626a55 | 8240 | dwo_file->name); |
3019eac3 DE |
8241 | } |
8242 | else | |
8243 | *slot = dwo_unit; | |
8244 | ||
09406207 | 8245 | if (dwarf2_read_debug) |
3019eac3 DE |
8246 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id 0x%s\n", |
8247 | offset.sect_off, | |
8248 | phex (dwo_unit->signature, | |
8249 | sizeof (dwo_unit->signature))); | |
8250 | } | |
8251 | ||
80626a55 DE |
8252 | /* Create a hash table to map DWO IDs to their CU entry in |
8253 | .debug_info.dwo in DWO_FILE. | |
8254 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 DE |
8255 | |
8256 | static htab_t | |
80626a55 | 8257 | create_dwo_debug_info_hash_table (struct dwo_file *dwo_file) |
3019eac3 DE |
8258 | { |
8259 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8260 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
8261 | bfd *abfd; | |
8262 | htab_t cu_htab; | |
8263 | gdb_byte *info_ptr, *end_ptr; | |
8264 | struct create_dwo_info_table_data create_dwo_info_table_data; | |
8265 | ||
8266 | dwarf2_read_section (objfile, section); | |
8267 | info_ptr = section->buffer; | |
8268 | ||
8269 | if (info_ptr == NULL) | |
8270 | return NULL; | |
8271 | ||
8272 | /* We can't set abfd until now because the section may be empty or | |
8273 | not present, in which case section->asection will be NULL. */ | |
8274 | abfd = section->asection->owner; | |
8275 | ||
09406207 | 8276 | if (dwarf2_read_debug) |
3019eac3 DE |
8277 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_info.dwo for %s:\n", |
8278 | bfd_get_filename (abfd)); | |
8279 | ||
8280 | cu_htab = allocate_dwo_unit_table (objfile); | |
8281 | ||
8282 | create_dwo_info_table_data.dwo_file = dwo_file; | |
8283 | create_dwo_info_table_data.cu_htab = cu_htab; | |
8284 | ||
8285 | end_ptr = info_ptr + section->size; | |
8286 | while (info_ptr < end_ptr) | |
8287 | { | |
8288 | struct dwarf2_per_cu_data per_cu; | |
8289 | ||
8290 | memset (&per_cu, 0, sizeof (per_cu)); | |
8291 | per_cu.objfile = objfile; | |
8292 | per_cu.is_debug_types = 0; | |
8293 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8294 | per_cu.info_or_types_section = section; | |
8295 | ||
8296 | init_cutu_and_read_dies_no_follow (&per_cu, | |
8297 | &dwo_file->sections.abbrev, | |
8298 | dwo_file, | |
80626a55 | 8299 | create_dwo_debug_info_hash_table_reader, |
3019eac3 DE |
8300 | &create_dwo_info_table_data); |
8301 | ||
8302 | info_ptr += per_cu.length; | |
8303 | } | |
8304 | ||
8305 | return cu_htab; | |
8306 | } | |
8307 | ||
80626a55 DE |
8308 | /* DWP file .debug_{cu,tu}_index section format: |
8309 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
8310 | ||
8311 | Both index sections have the same format, and serve to map a 64-bit | |
8312 | signature to a set of section numbers. Each section begins with a header, | |
8313 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
8314 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
8315 | aligned at 8-byte boundaries in the file. | |
8316 | ||
8317 | The index section header contains two unsigned 32-bit values (using the | |
8318 | byte order of the application binary): | |
8319 | ||
8320 | N, the number of compilation units or type units in the index | |
8321 | M, the number of slots in the hash table | |
8322 | ||
8323 | (We assume that N and M will not exceed 2^32 - 1.) | |
8324 | ||
8325 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
8326 | ||
8327 | The hash table begins at offset 8 in the section, and consists of an array | |
8328 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
8329 | order of the application binary). Unused slots in the hash table are 0. | |
8330 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
8331 | ||
8332 | The parallel table begins immediately after the hash table | |
8333 | (at offset 8 + 8 * M from the beginning of the section), and consists of an | |
8334 | array of 32-bit indexes (using the byte order of the application binary), | |
8335 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
8336 | table contains a 32-bit index into the pool of section numbers. For unused | |
8337 | hash table slots, the corresponding entry in the parallel table will be 0. | |
8338 | ||
8339 | Given a 64-bit compilation unit signature or a type signature S, an entry | |
8340 | in the hash table is located as follows: | |
8341 | ||
8342 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with | |
8343 | the low-order k bits all set to 1. | |
8344 | ||
8345 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). | |
8346 | ||
8347 | 3) If the hash table entry at index H matches the signature, use that | |
8348 | entry. If the hash table entry at index H is unused (all zeroes), | |
8349 | terminate the search: the signature is not present in the table. | |
8350 | ||
8351 | 4) Let H = (H + H') modulo M. Repeat at Step 3. | |
8352 | ||
8353 | Because M > N and H' and M are relatively prime, the search is guaranteed | |
8354 | to stop at an unused slot or find the match. | |
8355 | ||
8356 | The pool of section numbers begins immediately following the hash table | |
8357 | (at offset 8 + 12 * M from the beginning of the section). The pool of | |
8358 | section numbers consists of an array of 32-bit words (using the byte order | |
8359 | of the application binary). Each item in the array is indexed starting | |
8360 | from 0. The hash table entry provides the index of the first section | |
8361 | number in the set. Additional section numbers in the set follow, and the | |
8362 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
8363 | ||
8364 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
8365 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
8366 | be the second entry. Other members of the set may follow in any order. */ | |
8367 | ||
8368 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
8369 | .debug_{info,types}.dwo in DWP_FILE. | |
8370 | Returns NULL if there isn't one. | |
8371 | Note: This function processes DWP files only, not DWO files. */ | |
8372 | ||
8373 | static struct dwp_hash_table * | |
8374 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
8375 | { | |
8376 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8377 | bfd *dbfd = dwp_file->dbfd; | |
8378 | char *index_ptr, *index_end; | |
8379 | struct dwarf2_section_info *index; | |
8380 | uint32_t version, nr_units, nr_slots; | |
8381 | struct dwp_hash_table *htab; | |
8382 | ||
8383 | if (is_debug_types) | |
8384 | index = &dwp_file->sections.tu_index; | |
8385 | else | |
8386 | index = &dwp_file->sections.cu_index; | |
8387 | ||
8388 | if (dwarf2_section_empty_p (index)) | |
8389 | return NULL; | |
8390 | dwarf2_read_section (objfile, index); | |
8391 | ||
8392 | index_ptr = index->buffer; | |
8393 | index_end = index_ptr + index->size; | |
8394 | ||
8395 | version = read_4_bytes (dbfd, index_ptr); | |
8396 | index_ptr += 8; /* Skip the unused word. */ | |
8397 | nr_units = read_4_bytes (dbfd, index_ptr); | |
8398 | index_ptr += 4; | |
8399 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
8400 | index_ptr += 4; | |
8401 | ||
8402 | if (version != 1) | |
8403 | { | |
8404 | error (_("Dwarf Error: unsupported DWP file version (%u)" | |
8405 | " [in module %s]"), | |
8406 | version, dwp_file->name); | |
8407 | } | |
8408 | if (nr_slots != (nr_slots & -nr_slots)) | |
8409 | { | |
8410 | error (_("Dwarf Error: number of slots in DWP hash table (%u)" | |
8411 | " is not power of 2 [in module %s]"), | |
8412 | nr_slots, dwp_file->name); | |
8413 | } | |
8414 | ||
8415 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
8416 | htab->nr_units = nr_units; | |
8417 | htab->nr_slots = nr_slots; | |
8418 | htab->hash_table = index_ptr; | |
8419 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
8420 | htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
8421 | ||
8422 | return htab; | |
8423 | } | |
8424 | ||
8425 | /* Update SECTIONS with the data from SECTP. | |
8426 | ||
8427 | This function is like the other "locate" section routines that are | |
8428 | passed to bfd_map_over_sections, but in this context the sections to | |
8429 | read comes from the DWP hash table, not the full ELF section table. | |
8430 | ||
8431 | The result is non-zero for success, or zero if an error was found. */ | |
8432 | ||
8433 | static int | |
8434 | locate_virtual_dwo_sections (asection *sectp, | |
8435 | struct virtual_dwo_sections *sections) | |
8436 | { | |
8437 | const struct dwop_section_names *names = &dwop_section_names; | |
8438 | ||
8439 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
8440 | { | |
8441 | /* There can be only one. */ | |
8442 | if (sections->abbrev.asection != NULL) | |
8443 | return 0; | |
8444 | sections->abbrev.asection = sectp; | |
8445 | sections->abbrev.size = bfd_get_section_size (sectp); | |
8446 | } | |
8447 | else if (section_is_p (sectp->name, &names->info_dwo) | |
8448 | || section_is_p (sectp->name, &names->types_dwo)) | |
8449 | { | |
8450 | /* There can be only one. */ | |
8451 | if (sections->info_or_types.asection != NULL) | |
8452 | return 0; | |
8453 | sections->info_or_types.asection = sectp; | |
8454 | sections->info_or_types.size = bfd_get_section_size (sectp); | |
8455 | } | |
8456 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
8457 | { | |
8458 | /* There can be only one. */ | |
8459 | if (sections->line.asection != NULL) | |
8460 | return 0; | |
8461 | sections->line.asection = sectp; | |
8462 | sections->line.size = bfd_get_section_size (sectp); | |
8463 | } | |
8464 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
8465 | { | |
8466 | /* There can be only one. */ | |
8467 | if (sections->loc.asection != NULL) | |
8468 | return 0; | |
8469 | sections->loc.asection = sectp; | |
8470 | sections->loc.size = bfd_get_section_size (sectp); | |
8471 | } | |
8472 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
8473 | { | |
8474 | /* There can be only one. */ | |
8475 | if (sections->macinfo.asection != NULL) | |
8476 | return 0; | |
8477 | sections->macinfo.asection = sectp; | |
8478 | sections->macinfo.size = bfd_get_section_size (sectp); | |
8479 | } | |
8480 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
8481 | { | |
8482 | /* There can be only one. */ | |
8483 | if (sections->macro.asection != NULL) | |
8484 | return 0; | |
8485 | sections->macro.asection = sectp; | |
8486 | sections->macro.size = bfd_get_section_size (sectp); | |
8487 | } | |
8488 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
8489 | { | |
8490 | /* There can be only one. */ | |
8491 | if (sections->str_offsets.asection != NULL) | |
8492 | return 0; | |
8493 | sections->str_offsets.asection = sectp; | |
8494 | sections->str_offsets.size = bfd_get_section_size (sectp); | |
8495 | } | |
8496 | else | |
8497 | { | |
8498 | /* No other kind of section is valid. */ | |
8499 | return 0; | |
8500 | } | |
8501 | ||
8502 | return 1; | |
8503 | } | |
8504 | ||
8505 | /* Create a dwo_unit object for the DWO with signature SIGNATURE. | |
8506 | HTAB is the hash table from the DWP file. | |
8507 | SECTION_INDEX is the index of the DWO in HTAB. */ | |
8508 | ||
8509 | static struct dwo_unit * | |
8510 | create_dwo_in_dwp (struct dwp_file *dwp_file, | |
8511 | const struct dwp_hash_table *htab, | |
8512 | uint32_t section_index, | |
8513 | ULONGEST signature, int is_debug_types) | |
8514 | { | |
8515 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8516 | bfd *dbfd = dwp_file->dbfd; | |
8517 | const char *kind = is_debug_types ? "TU" : "CU"; | |
8518 | struct dwo_file *dwo_file; | |
8519 | struct dwo_unit *dwo_unit; | |
8520 | struct virtual_dwo_sections sections; | |
8521 | void **dwo_file_slot; | |
8522 | char *virtual_dwo_name; | |
8523 | struct dwarf2_section_info *cutu; | |
8524 | struct cleanup *cleanups; | |
8525 | int i; | |
8526 | ||
8527 | if (dwarf2_read_debug) | |
8528 | { | |
8529 | fprintf_unfiltered (gdb_stdlog, "Reading %s %u/0x%s in DWP file: %s\n", | |
8530 | kind, | |
8531 | section_index, phex (signature, sizeof (signature)), | |
8532 | dwp_file->name); | |
8533 | } | |
8534 | ||
8535 | /* Fetch the sections of this DWO. | |
8536 | Put a limit on the number of sections we look for so that bad data | |
8537 | doesn't cause us to loop forever. */ | |
8538 | ||
8539 | #define MAX_NR_DWO_SECTIONS \ | |
8540 | (1 /* .debug_info or .debug_types */ \ | |
8541 | + 1 /* .debug_abbrev */ \ | |
8542 | + 1 /* .debug_line */ \ | |
8543 | + 1 /* .debug_loc */ \ | |
8544 | + 1 /* .debug_str_offsets */ \ | |
8545 | + 1 /* .debug_macro */ \ | |
8546 | + 1 /* .debug_macinfo */ \ | |
8547 | + 1 /* trailing zero */) | |
8548 | ||
8549 | memset (§ions, 0, sizeof (sections)); | |
8550 | cleanups = make_cleanup (null_cleanup, 0); | |
8551 | ||
8552 | for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i) | |
8553 | { | |
8554 | asection *sectp; | |
8555 | uint32_t section_nr = | |
8556 | read_4_bytes (dbfd, | |
8557 | htab->section_pool | |
8558 | + (section_index + i) * sizeof (uint32_t)); | |
8559 | ||
8560 | if (section_nr == 0) | |
8561 | break; | |
8562 | if (section_nr >= dwp_file->num_sections) | |
8563 | { | |
8564 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
8565 | " [in module %s]"), | |
8566 | dwp_file->name); | |
8567 | } | |
8568 | ||
8569 | sectp = dwp_file->elf_sections[section_nr]; | |
8570 | if (! locate_virtual_dwo_sections (sectp, §ions)) | |
8571 | { | |
8572 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
8573 | " [in module %s]"), | |
8574 | dwp_file->name); | |
8575 | } | |
8576 | } | |
8577 | ||
8578 | if (i < 2 | |
8579 | || sections.info_or_types.asection == NULL | |
8580 | || sections.abbrev.asection == NULL) | |
8581 | { | |
8582 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
8583 | " [in module %s]"), | |
8584 | dwp_file->name); | |
8585 | } | |
8586 | if (i == MAX_NR_DWO_SECTIONS) | |
8587 | { | |
8588 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
8589 | " [in module %s]"), | |
8590 | dwp_file->name); | |
8591 | } | |
8592 | ||
8593 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
8594 | have dwo_unit "live" in that. At least for now. | |
8595 | ||
8596 | The DWP file can be made up of a random collection of CUs and TUs. | |
8597 | However, for each CU + set of TUs that came from the same original | |
8598 | DWO file, we want combine them back into a virtual DWO file to save space | |
8599 | (fewer struct dwo_file objects to allocated). Remember that for really | |
8600 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
8601 | ||
2792b94d PM |
8602 | virtual_dwo_name = |
8603 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
8604 | sections.abbrev.asection ? sections.abbrev.asection->id : 0, | |
8605 | sections.line.asection ? sections.line.asection->id : 0, | |
8606 | sections.loc.asection ? sections.loc.asection->id : 0, | |
8607 | (sections.str_offsets.asection | |
8608 | ? sections.str_offsets.asection->id | |
8609 | : 0)); | |
80626a55 DE |
8610 | make_cleanup (xfree, virtual_dwo_name); |
8611 | /* Can we use an existing virtual DWO file? */ | |
8612 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name); | |
8613 | /* Create one if necessary. */ | |
8614 | if (*dwo_file_slot == NULL) | |
8615 | { | |
8616 | if (dwarf2_read_debug) | |
8617 | { | |
8618 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
8619 | virtual_dwo_name); | |
8620 | } | |
8621 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
8622 | dwo_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
8623 | virtual_dwo_name, | |
8624 | strlen (virtual_dwo_name)); | |
8625 | dwo_file->sections.abbrev = sections.abbrev; | |
8626 | dwo_file->sections.line = sections.line; | |
8627 | dwo_file->sections.loc = sections.loc; | |
8628 | dwo_file->sections.macinfo = sections.macinfo; | |
8629 | dwo_file->sections.macro = sections.macro; | |
8630 | dwo_file->sections.str_offsets = sections.str_offsets; | |
8631 | /* The "str" section is global to the entire DWP file. */ | |
8632 | dwo_file->sections.str = dwp_file->sections.str; | |
8633 | /* The info or types section is assigned later to dwo_unit, | |
8634 | there's no need to record it in dwo_file. | |
8635 | Also, we can't simply record type sections in dwo_file because | |
8636 | we record a pointer into the vector in dwo_unit. As we collect more | |
8637 | types we'll grow the vector and eventually have to reallocate space | |
8638 | for it, invalidating all the pointers into the current copy. */ | |
8639 | *dwo_file_slot = dwo_file; | |
8640 | } | |
8641 | else | |
8642 | { | |
8643 | if (dwarf2_read_debug) | |
8644 | { | |
8645 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
8646 | virtual_dwo_name); | |
8647 | } | |
8648 | dwo_file = *dwo_file_slot; | |
8649 | } | |
8650 | do_cleanups (cleanups); | |
8651 | ||
8652 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8653 | dwo_unit->dwo_file = dwo_file; | |
8654 | dwo_unit->signature = signature; | |
8655 | dwo_unit->info_or_types_section = | |
8656 | obstack_alloc (&objfile->objfile_obstack, | |
8657 | sizeof (struct dwarf2_section_info)); | |
8658 | *dwo_unit->info_or_types_section = sections.info_or_types; | |
8659 | /* offset, length, type_offset_in_tu are set later. */ | |
8660 | ||
8661 | return dwo_unit; | |
8662 | } | |
8663 | ||
8664 | /* Lookup the DWO with SIGNATURE in DWP_FILE. */ | |
8665 | ||
8666 | static struct dwo_unit * | |
8667 | lookup_dwo_in_dwp (struct dwp_file *dwp_file, | |
8668 | const struct dwp_hash_table *htab, | |
8669 | ULONGEST signature, int is_debug_types) | |
8670 | { | |
8671 | bfd *dbfd = dwp_file->dbfd; | |
8672 | uint32_t mask = htab->nr_slots - 1; | |
8673 | uint32_t hash = signature & mask; | |
8674 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
8675 | unsigned int i; | |
8676 | void **slot; | |
8677 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
8678 | ||
8679 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
8680 | find_dwo_cu.signature = signature; | |
8681 | slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT); | |
8682 | ||
8683 | if (*slot != NULL) | |
8684 | return *slot; | |
8685 | ||
8686 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
8687 | for (i = 0; i < htab->nr_slots; ++i) | |
8688 | { | |
8689 | ULONGEST signature_in_table; | |
8690 | ||
8691 | signature_in_table = | |
8692 | read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t)); | |
8693 | if (signature_in_table == signature) | |
8694 | { | |
8695 | uint32_t section_index = | |
8696 | read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t)); | |
8697 | ||
8698 | *slot = create_dwo_in_dwp (dwp_file, htab, section_index, | |
8699 | signature, is_debug_types); | |
8700 | return *slot; | |
8701 | } | |
8702 | if (signature_in_table == 0) | |
8703 | return NULL; | |
8704 | hash = (hash + hash2) & mask; | |
8705 | } | |
8706 | ||
8707 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
8708 | " [in module %s]"), | |
8709 | dwp_file->name); | |
8710 | } | |
8711 | ||
8712 | /* Subroutine of open_dwop_file to simplify it. | |
3019eac3 DE |
8713 | Open the file specified by FILE_NAME and hand it off to BFD for |
8714 | preliminary analysis. Return a newly initialized bfd *, which | |
8715 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 8716 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
3019eac3 DE |
8717 | In case of trouble, return NULL. |
8718 | NOTE: This function is derived from symfile_bfd_open. */ | |
8719 | ||
8720 | static bfd * | |
80626a55 | 8721 | try_open_dwop_file (const char *file_name, int is_dwp) |
3019eac3 DE |
8722 | { |
8723 | bfd *sym_bfd; | |
80626a55 | 8724 | int desc, flags; |
3019eac3 | 8725 | char *absolute_name; |
3019eac3 | 8726 | |
80626a55 DE |
8727 | flags = OPF_TRY_CWD_FIRST; |
8728 | if (is_dwp) | |
8729 | flags |= OPF_SEARCH_IN_PATH; | |
8730 | desc = openp (debug_file_directory, flags, file_name, | |
3019eac3 DE |
8731 | O_RDONLY | O_BINARY, &absolute_name); |
8732 | if (desc < 0) | |
8733 | return NULL; | |
8734 | ||
bb397797 | 8735 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
3019eac3 DE |
8736 | if (!sym_bfd) |
8737 | { | |
3019eac3 DE |
8738 | xfree (absolute_name); |
8739 | return NULL; | |
8740 | } | |
a4453b7e | 8741 | xfree (absolute_name); |
3019eac3 DE |
8742 | bfd_set_cacheable (sym_bfd, 1); |
8743 | ||
8744 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
8745 | { | |
cbb099e8 | 8746 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
8747 | return NULL; |
8748 | } | |
8749 | ||
3019eac3 DE |
8750 | return sym_bfd; |
8751 | } | |
8752 | ||
80626a55 | 8753 | /* Try to open DWO/DWP file FILE_NAME. |
3019eac3 | 8754 | COMP_DIR is the DW_AT_comp_dir attribute. |
80626a55 | 8755 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
3019eac3 DE |
8756 | The result is the bfd handle of the file. |
8757 | If there is a problem finding or opening the file, return NULL. | |
8758 | Upon success, the canonicalized path of the file is stored in the bfd, | |
8759 | same as symfile_bfd_open. */ | |
8760 | ||
8761 | static bfd * | |
80626a55 | 8762 | open_dwop_file (const char *file_name, const char *comp_dir, int is_dwp) |
3019eac3 DE |
8763 | { |
8764 | bfd *abfd; | |
3019eac3 | 8765 | |
80626a55 DE |
8766 | if (IS_ABSOLUTE_PATH (file_name)) |
8767 | return try_open_dwop_file (file_name, is_dwp); | |
3019eac3 DE |
8768 | |
8769 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
8770 | ||
8771 | if (comp_dir != NULL) | |
8772 | { | |
80626a55 | 8773 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
8774 | |
8775 | /* NOTE: If comp_dir is a relative path, this will also try the | |
8776 | search path, which seems useful. */ | |
80626a55 | 8777 | abfd = try_open_dwop_file (path_to_try, is_dwp); |
3019eac3 DE |
8778 | xfree (path_to_try); |
8779 | if (abfd != NULL) | |
8780 | return abfd; | |
8781 | } | |
8782 | ||
8783 | /* That didn't work, try debug-file-directory, which, despite its name, | |
8784 | is a list of paths. */ | |
8785 | ||
8786 | if (*debug_file_directory == '\0') | |
8787 | return NULL; | |
8788 | ||
80626a55 | 8789 | return try_open_dwop_file (file_name, is_dwp); |
3019eac3 DE |
8790 | } |
8791 | ||
80626a55 DE |
8792 | /* This function is mapped across the sections and remembers the offset and |
8793 | size of each of the DWO debugging sections we are interested in. */ | |
8794 | ||
8795 | static void | |
8796 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
8797 | { | |
8798 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
8799 | const struct dwop_section_names *names = &dwop_section_names; | |
8800 | ||
8801 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
8802 | { | |
8803 | dwo_sections->abbrev.asection = sectp; | |
8804 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); | |
8805 | } | |
8806 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
8807 | { | |
8808 | dwo_sections->info.asection = sectp; | |
8809 | dwo_sections->info.size = bfd_get_section_size (sectp); | |
8810 | } | |
8811 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
8812 | { | |
8813 | dwo_sections->line.asection = sectp; | |
8814 | dwo_sections->line.size = bfd_get_section_size (sectp); | |
8815 | } | |
8816 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
8817 | { | |
8818 | dwo_sections->loc.asection = sectp; | |
8819 | dwo_sections->loc.size = bfd_get_section_size (sectp); | |
8820 | } | |
8821 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
8822 | { | |
8823 | dwo_sections->macinfo.asection = sectp; | |
8824 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); | |
8825 | } | |
8826 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
8827 | { | |
8828 | dwo_sections->macro.asection = sectp; | |
8829 | dwo_sections->macro.size = bfd_get_section_size (sectp); | |
8830 | } | |
8831 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
8832 | { | |
8833 | dwo_sections->str.asection = sectp; | |
8834 | dwo_sections->str.size = bfd_get_section_size (sectp); | |
8835 | } | |
8836 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
8837 | { | |
8838 | dwo_sections->str_offsets.asection = sectp; | |
8839 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); | |
8840 | } | |
8841 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
8842 | { | |
8843 | struct dwarf2_section_info type_section; | |
8844 | ||
8845 | memset (&type_section, 0, sizeof (type_section)); | |
8846 | type_section.asection = sectp; | |
8847 | type_section.size = bfd_get_section_size (sectp); | |
8848 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
8849 | &type_section); | |
8850 | } | |
8851 | } | |
8852 | ||
8853 | /* Initialize the use of the DWO file specified by DWO_NAME. | |
8854 | The result is NULL if DWO_NAME can't be found. */ | |
3019eac3 DE |
8855 | |
8856 | static struct dwo_file * | |
80626a55 | 8857 | open_and_init_dwo_file (const char *dwo_name, const char *comp_dir) |
3019eac3 DE |
8858 | { |
8859 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
8860 | struct dwo_file *dwo_file; |
8861 | bfd *dbfd; | |
3019eac3 DE |
8862 | struct cleanup *cleanups; |
8863 | ||
80626a55 DE |
8864 | dbfd = open_dwop_file (dwo_name, comp_dir, 0); |
8865 | if (dbfd == NULL) | |
8866 | { | |
8867 | if (dwarf2_read_debug) | |
8868 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
8869 | return NULL; | |
8870 | } | |
8871 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
8872 | dwo_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
8873 | dwo_name, strlen (dwo_name)); | |
8874 | dwo_file->dbfd = dbfd; | |
3019eac3 DE |
8875 | |
8876 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
8877 | ||
80626a55 | 8878 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 8879 | |
80626a55 | 8880 | dwo_file->cus = create_dwo_debug_info_hash_table (dwo_file); |
3019eac3 DE |
8881 | |
8882 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
8883 | dwo_file->sections.types); | |
8884 | ||
8885 | discard_cleanups (cleanups); | |
8886 | ||
80626a55 DE |
8887 | if (dwarf2_read_debug) |
8888 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
8889 | ||
3019eac3 DE |
8890 | return dwo_file; |
8891 | } | |
8892 | ||
80626a55 DE |
8893 | /* This function is mapped across the sections and remembers the offset and |
8894 | size of each of the DWP debugging sections we are interested in. */ | |
3019eac3 | 8895 | |
80626a55 DE |
8896 | static void |
8897 | dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
3019eac3 | 8898 | { |
80626a55 DE |
8899 | struct dwp_file *dwp_file = dwp_file_ptr; |
8900 | const struct dwop_section_names *names = &dwop_section_names; | |
8901 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 8902 | |
80626a55 DE |
8903 | /* Record the ELF section number for later lookup: this is what the |
8904 | .debug_cu_index,.debug_tu_index tables use. */ | |
8905 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
8906 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 8907 | |
80626a55 DE |
8908 | /* Look for specific sections that we need. */ |
8909 | if (section_is_p (sectp->name, &names->str_dwo)) | |
8910 | { | |
8911 | dwp_file->sections.str.asection = sectp; | |
8912 | dwp_file->sections.str.size = bfd_get_section_size (sectp); | |
8913 | } | |
8914 | else if (section_is_p (sectp->name, &names->cu_index)) | |
8915 | { | |
8916 | dwp_file->sections.cu_index.asection = sectp; | |
8917 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); | |
8918 | } | |
8919 | else if (section_is_p (sectp->name, &names->tu_index)) | |
8920 | { | |
8921 | dwp_file->sections.tu_index.asection = sectp; | |
8922 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); | |
8923 | } | |
8924 | } | |
3019eac3 | 8925 | |
80626a55 | 8926 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 8927 | |
80626a55 DE |
8928 | static hashval_t |
8929 | hash_dwp_loaded_cutus (const void *item) | |
8930 | { | |
8931 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 8932 | |
80626a55 DE |
8933 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
8934 | return dwo_unit->signature; | |
3019eac3 DE |
8935 | } |
8936 | ||
80626a55 | 8937 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 8938 | |
80626a55 DE |
8939 | static int |
8940 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 8941 | { |
80626a55 DE |
8942 | const struct dwo_unit *dua = a; |
8943 | const struct dwo_unit *dub = b; | |
3019eac3 | 8944 | |
80626a55 DE |
8945 | return dua->signature == dub->signature; |
8946 | } | |
3019eac3 | 8947 | |
80626a55 | 8948 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 8949 | |
80626a55 DE |
8950 | static htab_t |
8951 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
8952 | { | |
8953 | return htab_create_alloc_ex (3, | |
8954 | hash_dwp_loaded_cutus, | |
8955 | eq_dwp_loaded_cutus, | |
8956 | NULL, | |
8957 | &objfile->objfile_obstack, | |
8958 | hashtab_obstack_allocate, | |
8959 | dummy_obstack_deallocate); | |
8960 | } | |
3019eac3 | 8961 | |
80626a55 DE |
8962 | /* Initialize the use of the DWP file for the current objfile. |
8963 | By convention the name of the DWP file is ${objfile}.dwp. | |
8964 | The result is NULL if it can't be found. */ | |
a766d390 | 8965 | |
80626a55 DE |
8966 | static struct dwp_file * |
8967 | open_and_init_dwp_file (const char *comp_dir) | |
8968 | { | |
8969 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8970 | struct dwp_file *dwp_file; | |
8971 | char *dwp_name; | |
8972 | bfd *dbfd; | |
8973 | struct cleanup *cleanups; | |
8974 | ||
2792b94d | 8975 | dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name); |
80626a55 DE |
8976 | cleanups = make_cleanup (xfree, dwp_name); |
8977 | ||
8978 | dbfd = open_dwop_file (dwp_name, comp_dir, 1); | |
8979 | if (dbfd == NULL) | |
8980 | { | |
8981 | if (dwarf2_read_debug) | |
8982 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
8983 | do_cleanups (cleanups); | |
8984 | return NULL; | |
3019eac3 | 8985 | } |
80626a55 DE |
8986 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
8987 | dwp_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
8988 | dwp_name, strlen (dwp_name)); | |
8989 | dwp_file->dbfd = dbfd; | |
8990 | do_cleanups (cleanups); | |
c906108c | 8991 | |
80626a55 | 8992 | cleanups = make_cleanup (free_dwo_file_cleanup, dwp_file); |
df8a16a1 | 8993 | |
80626a55 DE |
8994 | /* +1: section 0 is unused */ |
8995 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
8996 | dwp_file->elf_sections = | |
8997 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
8998 | dwp_file->num_sections, asection *); | |
8999 | ||
9000 | bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file); | |
9001 | ||
9002 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
9003 | ||
9004 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
9005 | ||
9006 | dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile); | |
9007 | ||
9008 | discard_cleanups (cleanups); | |
9009 | ||
9010 | if (dwarf2_read_debug) | |
9011 | { | |
9012 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
9013 | fprintf_unfiltered (gdb_stdlog, | |
9014 | " %u CUs, %u TUs\n", | |
9015 | dwp_file->cus ? dwp_file->cus->nr_units : 0, | |
9016 | dwp_file->tus ? dwp_file->tus->nr_units : 0); | |
9017 | } | |
9018 | ||
9019 | return dwp_file; | |
3019eac3 | 9020 | } |
c906108c | 9021 | |
80626a55 DE |
9022 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
9023 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
9024 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 9025 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
9026 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
9027 | ||
9028 | This is called, for example, when wanting to read a variable with a | |
9029 | complex location. Therefore we don't want to do file i/o for every call. | |
9030 | Therefore we don't want to look for a DWO file on every call. | |
9031 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
9032 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
9033 | for a DWO file. | |
9034 | ||
1c658ad5 | 9035 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 9036 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 9037 | |
3019eac3 | 9038 | static struct dwo_unit * |
80626a55 DE |
9039 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
9040 | const char *dwo_name, const char *comp_dir, | |
9041 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
9042 | { |
9043 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9044 | const char *kind = is_debug_types ? "TU" : "CU"; |
9045 | void **dwo_file_slot; | |
3019eac3 | 9046 | struct dwo_file *dwo_file; |
80626a55 | 9047 | struct dwp_file *dwp_file; |
cb1df416 | 9048 | |
80626a55 | 9049 | /* Have we already read SIGNATURE from a DWP file? */ |
cf2c3c16 | 9050 | |
80626a55 DE |
9051 | if (! dwarf2_per_objfile->dwp_checked) |
9052 | { | |
9053 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (comp_dir); | |
9054 | dwarf2_per_objfile->dwp_checked = 1; | |
9055 | } | |
9056 | dwp_file = dwarf2_per_objfile->dwp_file; | |
3019eac3 | 9057 | |
80626a55 | 9058 | if (dwp_file != NULL) |
cf2c3c16 | 9059 | { |
80626a55 DE |
9060 | const struct dwp_hash_table *dwp_htab = |
9061 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9062 | ||
9063 | if (dwp_htab != NULL) | |
9064 | { | |
9065 | struct dwo_unit *dwo_cutu = | |
9066 | lookup_dwo_in_dwp (dwp_file, dwp_htab, signature, is_debug_types); | |
9067 | ||
9068 | if (dwo_cutu != NULL) | |
9069 | { | |
9070 | if (dwarf2_read_debug) | |
9071 | { | |
9072 | fprintf_unfiltered (gdb_stdlog, | |
9073 | "Virtual DWO %s %s found: @%s\n", | |
9074 | kind, hex_string (signature), | |
9075 | host_address_to_string (dwo_cutu)); | |
9076 | } | |
9077 | return dwo_cutu; | |
9078 | } | |
9079 | } | |
9080 | } | |
9081 | ||
9082 | /* Have we already seen DWO_NAME? */ | |
9083 | ||
9084 | dwo_file_slot = lookup_dwo_file_slot (dwo_name); | |
9085 | if (*dwo_file_slot == NULL) | |
9086 | { | |
9087 | /* Read in the file and build a table of the DWOs it contains. */ | |
9088 | *dwo_file_slot = open_and_init_dwo_file (dwo_name, comp_dir); | |
9089 | } | |
9090 | /* NOTE: This will be NULL if unable to open the file. */ | |
9091 | dwo_file = *dwo_file_slot; | |
9092 | ||
9093 | if (dwo_file != NULL) | |
9094 | { | |
9095 | htab_t htab = is_debug_types ? dwo_file->tus : dwo_file->cus; | |
9096 | ||
9097 | if (htab != NULL) | |
9098 | { | |
9099 | struct dwo_unit find_dwo_cutu, *dwo_cutu; | |
9a619af0 | 9100 | |
80626a55 DE |
9101 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
9102 | find_dwo_cutu.signature = signature; | |
9103 | dwo_cutu = htab_find (htab, &find_dwo_cutu); | |
3019eac3 | 9104 | |
80626a55 DE |
9105 | if (dwo_cutu != NULL) |
9106 | { | |
9107 | if (dwarf2_read_debug) | |
9108 | { | |
9109 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
9110 | kind, dwo_name, hex_string (signature), | |
9111 | host_address_to_string (dwo_cutu)); | |
9112 | } | |
9113 | return dwo_cutu; | |
9114 | } | |
9115 | } | |
2e276125 | 9116 | } |
9cdd5dbd | 9117 | |
80626a55 DE |
9118 | /* We didn't find it. This could mean a dwo_id mismatch, or |
9119 | someone deleted the DWO/DWP file, or the search path isn't set up | |
9120 | correctly to find the file. */ | |
9121 | ||
9122 | if (dwarf2_read_debug) | |
9123 | { | |
9124 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
9125 | kind, dwo_name, hex_string (signature)); | |
9126 | } | |
3019eac3 DE |
9127 | |
9128 | complaint (&symfile_complaints, | |
80626a55 | 9129 | _("Could not find DWO CU referenced by CU at offset 0x%x" |
3019eac3 | 9130 | " [in module %s]"), |
80626a55 | 9131 | this_unit->offset.sect_off, objfile->name); |
3019eac3 | 9132 | return NULL; |
5fb290d7 DJ |
9133 | } |
9134 | ||
80626a55 DE |
9135 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
9136 | See lookup_dwo_cutu_unit for details. */ | |
9137 | ||
9138 | static struct dwo_unit * | |
9139 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
9140 | const char *dwo_name, const char *comp_dir, | |
9141 | ULONGEST signature) | |
9142 | { | |
9143 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
9144 | } | |
9145 | ||
9146 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
9147 | See lookup_dwo_cutu_unit for details. */ | |
9148 | ||
9149 | static struct dwo_unit * | |
9150 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
9151 | const char *dwo_name, const char *comp_dir) | |
9152 | { | |
9153 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
9154 | } | |
9155 | ||
3019eac3 DE |
9156 | /* Free all resources associated with DWO_FILE. |
9157 | Close the DWO file and munmap the sections. | |
9158 | All memory should be on the objfile obstack. */ | |
348e048f DE |
9159 | |
9160 | static void | |
3019eac3 | 9161 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 9162 | { |
3019eac3 DE |
9163 | int ix; |
9164 | struct dwarf2_section_info *section; | |
348e048f | 9165 | |
80626a55 DE |
9166 | gdb_assert (dwo_file->dbfd != objfile->obfd); |
9167 | gdb_bfd_unref (dwo_file->dbfd); | |
348e048f | 9168 | |
3019eac3 DE |
9169 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
9170 | } | |
348e048f | 9171 | |
3019eac3 | 9172 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 9173 | |
3019eac3 DE |
9174 | static void |
9175 | free_dwo_file_cleanup (void *arg) | |
9176 | { | |
9177 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
9178 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 9179 | |
3019eac3 DE |
9180 | free_dwo_file (dwo_file, objfile); |
9181 | } | |
348e048f | 9182 | |
3019eac3 | 9183 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 9184 | |
3019eac3 DE |
9185 | static int |
9186 | free_dwo_file_from_slot (void **slot, void *info) | |
9187 | { | |
9188 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
9189 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 9190 | |
3019eac3 | 9191 | free_dwo_file (dwo_file, objfile); |
348e048f | 9192 | |
3019eac3 DE |
9193 | return 1; |
9194 | } | |
348e048f | 9195 | |
3019eac3 | 9196 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 9197 | |
3019eac3 DE |
9198 | static void |
9199 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
9200 | { | |
9201 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 9202 | } |
3019eac3 DE |
9203 | \f |
9204 | /* Read in various DIEs. */ | |
348e048f | 9205 | |
d389af10 JK |
9206 | /* qsort helper for inherit_abstract_dies. */ |
9207 | ||
9208 | static int | |
9209 | unsigned_int_compar (const void *ap, const void *bp) | |
9210 | { | |
9211 | unsigned int a = *(unsigned int *) ap; | |
9212 | unsigned int b = *(unsigned int *) bp; | |
9213 | ||
9214 | return (a > b) - (b > a); | |
9215 | } | |
9216 | ||
9217 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
9218 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
9219 | already referenced by DW_AT_abstract_origin from the children of the | |
9220 | current DIE. */ | |
d389af10 JK |
9221 | |
9222 | static void | |
9223 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
9224 | { | |
9225 | struct die_info *child_die; | |
9226 | unsigned die_children_count; | |
9227 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
9228 | sect_offset *offsets; |
9229 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
9230 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
9231 | struct die_info *origin_die; | |
9232 | /* Iterator of the ORIGIN_DIE children. */ | |
9233 | struct die_info *origin_child_die; | |
9234 | struct cleanup *cleanups; | |
9235 | struct attribute *attr; | |
cd02d79d PA |
9236 | struct dwarf2_cu *origin_cu; |
9237 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
9238 | |
9239 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9240 | if (!attr) | |
9241 | return; | |
9242 | ||
cd02d79d PA |
9243 | /* Note that following die references may follow to a die in a |
9244 | different cu. */ | |
9245 | ||
9246 | origin_cu = cu; | |
9247 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
9248 | ||
9249 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
9250 | symbols in. */ | |
9251 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
9252 | origin_cu->list_in_scope = cu->list_in_scope; | |
9253 | ||
edb3359d DJ |
9254 | if (die->tag != origin_die->tag |
9255 | && !(die->tag == DW_TAG_inlined_subroutine | |
9256 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9257 | complaint (&symfile_complaints, |
9258 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 9259 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
9260 | |
9261 | child_die = die->child; | |
9262 | die_children_count = 0; | |
9263 | while (child_die && child_die->tag) | |
9264 | { | |
9265 | child_die = sibling_die (child_die); | |
9266 | die_children_count++; | |
9267 | } | |
9268 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
9269 | cleanups = make_cleanup (xfree, offsets); | |
9270 | ||
9271 | offsets_end = offsets; | |
9272 | child_die = die->child; | |
9273 | while (child_die && child_die->tag) | |
9274 | { | |
c38f313d DJ |
9275 | /* For each CHILD_DIE, find the corresponding child of |
9276 | ORIGIN_DIE. If there is more than one layer of | |
9277 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
9278 | but GCC versions at least through 4.4 generate this (GCC PR | |
9279 | 40573). */ | |
9280 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 9281 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 9282 | |
c38f313d DJ |
9283 | while (1) |
9284 | { | |
cd02d79d PA |
9285 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
9286 | child_origin_cu); | |
c38f313d DJ |
9287 | if (attr == NULL) |
9288 | break; | |
cd02d79d PA |
9289 | child_origin_die = follow_die_ref (child_origin_die, attr, |
9290 | &child_origin_cu); | |
c38f313d DJ |
9291 | } |
9292 | ||
d389af10 JK |
9293 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
9294 | counterpart may exist. */ | |
c38f313d | 9295 | if (child_origin_die != child_die) |
d389af10 | 9296 | { |
edb3359d DJ |
9297 | if (child_die->tag != child_origin_die->tag |
9298 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
9299 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9300 | complaint (&symfile_complaints, |
9301 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9302 | "different tags"), child_die->offset.sect_off, |
9303 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9304 | if (child_origin_die->parent != origin_die) |
9305 | complaint (&symfile_complaints, | |
9306 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9307 | "different parents"), child_die->offset.sect_off, |
9308 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9309 | else |
9310 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
9311 | } |
9312 | child_die = sibling_die (child_die); | |
9313 | } | |
9314 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
9315 | unsigned_int_compar); | |
9316 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 9317 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
9318 | complaint (&symfile_complaints, |
9319 | _("Multiple children of DIE 0x%x refer " | |
9320 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 9321 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
9322 | |
9323 | offsetp = offsets; | |
9324 | origin_child_die = origin_die->child; | |
9325 | while (origin_child_die && origin_child_die->tag) | |
9326 | { | |
9327 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
9328 | while (offsetp < offsets_end |
9329 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 9330 | offsetp++; |
b64f50a1 JK |
9331 | if (offsetp >= offsets_end |
9332 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 JK |
9333 | { |
9334 | /* Found that ORIGIN_CHILD_DIE is really not referenced. */ | |
cd02d79d | 9335 | process_die (origin_child_die, origin_cu); |
d389af10 JK |
9336 | } |
9337 | origin_child_die = sibling_die (origin_child_die); | |
9338 | } | |
cd02d79d | 9339 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
9340 | |
9341 | do_cleanups (cleanups); | |
9342 | } | |
9343 | ||
c906108c | 9344 | static void |
e7c27a73 | 9345 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9346 | { |
e7c27a73 | 9347 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9348 | struct context_stack *new; |
c906108c SS |
9349 | CORE_ADDR lowpc; |
9350 | CORE_ADDR highpc; | |
9351 | struct die_info *child_die; | |
edb3359d | 9352 | struct attribute *attr, *call_line, *call_file; |
c906108c | 9353 | char *name; |
e142c38c | 9354 | CORE_ADDR baseaddr; |
801e3a5b | 9355 | struct block *block; |
edb3359d | 9356 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
9357 | VEC (symbolp) *template_args = NULL; |
9358 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
9359 | |
9360 | if (inlined_func) | |
9361 | { | |
9362 | /* If we do not have call site information, we can't show the | |
9363 | caller of this inlined function. That's too confusing, so | |
9364 | only use the scope for local variables. */ | |
9365 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
9366 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
9367 | if (call_line == NULL || call_file == NULL) | |
9368 | { | |
9369 | read_lexical_block_scope (die, cu); | |
9370 | return; | |
9371 | } | |
9372 | } | |
c906108c | 9373 | |
e142c38c DJ |
9374 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
9375 | ||
94af9270 | 9376 | name = dwarf2_name (die, cu); |
c906108c | 9377 | |
e8d05480 JB |
9378 | /* Ignore functions with missing or empty names. These are actually |
9379 | illegal according to the DWARF standard. */ | |
9380 | if (name == NULL) | |
9381 | { | |
9382 | complaint (&symfile_complaints, | |
b64f50a1 JK |
9383 | _("missing name for subprogram DIE at %d"), |
9384 | die->offset.sect_off); | |
e8d05480 JB |
9385 | return; |
9386 | } | |
9387 | ||
9388 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
9389 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
9390 | { | |
ae4d0c03 PM |
9391 | attr = dwarf2_attr (die, DW_AT_external, cu); |
9392 | if (!attr || !DW_UNSND (attr)) | |
9393 | complaint (&symfile_complaints, | |
3e43a32a MS |
9394 | _("cannot get low and high bounds " |
9395 | "for subprogram DIE at %d"), | |
b64f50a1 | 9396 | die->offset.sect_off); |
e8d05480 JB |
9397 | return; |
9398 | } | |
c906108c SS |
9399 | |
9400 | lowpc += baseaddr; | |
9401 | highpc += baseaddr; | |
9402 | ||
34eaf542 TT |
9403 | /* If we have any template arguments, then we must allocate a |
9404 | different sort of symbol. */ | |
9405 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
9406 | { | |
9407 | if (child_die->tag == DW_TAG_template_type_param | |
9408 | || child_die->tag == DW_TAG_template_value_param) | |
9409 | { | |
9410 | templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
9411 | struct template_symbol); | |
9412 | templ_func->base.is_cplus_template_function = 1; | |
9413 | break; | |
9414 | } | |
9415 | } | |
9416 | ||
c906108c | 9417 | new = push_context (0, lowpc); |
34eaf542 TT |
9418 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
9419 | (struct symbol *) templ_func); | |
4c2df51b | 9420 | |
4cecd739 DJ |
9421 | /* If there is a location expression for DW_AT_frame_base, record |
9422 | it. */ | |
e142c38c | 9423 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 9424 | if (attr) |
c034e007 AC |
9425 | /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location |
9426 | expression is being recorded directly in the function's symbol | |
9427 | and not in a separate frame-base object. I guess this hack is | |
9428 | to avoid adding some sort of frame-base adjunct/annex to the | |
9429 | function's symbol :-(. The problem with doing this is that it | |
9430 | results in a function symbol with a location expression that | |
9431 | has nothing to do with the location of the function, ouch! The | |
9432 | relationship should be: a function's symbol has-a frame base; a | |
9433 | frame-base has-a location expression. */ | |
e7c27a73 | 9434 | dwarf2_symbol_mark_computed (attr, new->name, cu); |
4c2df51b | 9435 | |
e142c38c | 9436 | cu->list_in_scope = &local_symbols; |
c906108c | 9437 | |
639d11d3 | 9438 | if (die->child != NULL) |
c906108c | 9439 | { |
639d11d3 | 9440 | child_die = die->child; |
c906108c SS |
9441 | while (child_die && child_die->tag) |
9442 | { | |
34eaf542 TT |
9443 | if (child_die->tag == DW_TAG_template_type_param |
9444 | || child_die->tag == DW_TAG_template_value_param) | |
9445 | { | |
9446 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
9447 | ||
f1078f66 DJ |
9448 | if (arg != NULL) |
9449 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
9450 | } |
9451 | else | |
9452 | process_die (child_die, cu); | |
c906108c SS |
9453 | child_die = sibling_die (child_die); |
9454 | } | |
9455 | } | |
9456 | ||
d389af10 JK |
9457 | inherit_abstract_dies (die, cu); |
9458 | ||
4a811a97 UW |
9459 | /* If we have a DW_AT_specification, we might need to import using |
9460 | directives from the context of the specification DIE. See the | |
9461 | comment in determine_prefix. */ | |
9462 | if (cu->language == language_cplus | |
9463 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
9464 | { | |
9465 | struct dwarf2_cu *spec_cu = cu; | |
9466 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
9467 | ||
9468 | while (spec_die) | |
9469 | { | |
9470 | child_die = spec_die->child; | |
9471 | while (child_die && child_die->tag) | |
9472 | { | |
9473 | if (child_die->tag == DW_TAG_imported_module) | |
9474 | process_die (child_die, spec_cu); | |
9475 | child_die = sibling_die (child_die); | |
9476 | } | |
9477 | ||
9478 | /* In some cases, GCC generates specification DIEs that | |
9479 | themselves contain DW_AT_specification attributes. */ | |
9480 | spec_die = die_specification (spec_die, &spec_cu); | |
9481 | } | |
9482 | } | |
9483 | ||
c906108c SS |
9484 | new = pop_context (); |
9485 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
9486 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
9487 | lowpc, highpc, objfile); | |
9488 | ||
df8a16a1 | 9489 | /* For C++, set the block's scope. */ |
f55ee35c | 9490 | if (cu->language == language_cplus || cu->language == language_fortran) |
df8a16a1 | 9491 | cp_set_block_scope (new->name, block, &objfile->objfile_obstack, |
0114d602 | 9492 | determine_prefix (die, cu), |
df8a16a1 DJ |
9493 | processing_has_namespace_info); |
9494 | ||
801e3a5b JB |
9495 | /* If we have address ranges, record them. */ |
9496 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 9497 | |
34eaf542 TT |
9498 | /* Attach template arguments to function. */ |
9499 | if (! VEC_empty (symbolp, template_args)) | |
9500 | { | |
9501 | gdb_assert (templ_func != NULL); | |
9502 | ||
9503 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
9504 | templ_func->template_arguments | |
9505 | = obstack_alloc (&objfile->objfile_obstack, | |
9506 | (templ_func->n_template_arguments | |
9507 | * sizeof (struct symbol *))); | |
9508 | memcpy (templ_func->template_arguments, | |
9509 | VEC_address (symbolp, template_args), | |
9510 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
9511 | VEC_free (symbolp, template_args); | |
9512 | } | |
9513 | ||
208d8187 JB |
9514 | /* In C++, we can have functions nested inside functions (e.g., when |
9515 | a function declares a class that has methods). This means that | |
9516 | when we finish processing a function scope, we may need to go | |
9517 | back to building a containing block's symbol lists. */ | |
9518 | local_symbols = new->locals; | |
27aa8d6a | 9519 | using_directives = new->using_directives; |
208d8187 | 9520 | |
921e78cf JB |
9521 | /* If we've finished processing a top-level function, subsequent |
9522 | symbols go in the file symbol list. */ | |
9523 | if (outermost_context_p ()) | |
e142c38c | 9524 | cu->list_in_scope = &file_symbols; |
c906108c SS |
9525 | } |
9526 | ||
9527 | /* Process all the DIES contained within a lexical block scope. Start | |
9528 | a new scope, process the dies, and then close the scope. */ | |
9529 | ||
9530 | static void | |
e7c27a73 | 9531 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9532 | { |
e7c27a73 | 9533 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9534 | struct context_stack *new; |
c906108c SS |
9535 | CORE_ADDR lowpc, highpc; |
9536 | struct die_info *child_die; | |
e142c38c DJ |
9537 | CORE_ADDR baseaddr; |
9538 | ||
9539 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
9540 | |
9541 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
9542 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
9543 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 9544 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 9545 | describe ranges. */ |
d85a05f0 | 9546 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
9547 | return; |
9548 | lowpc += baseaddr; | |
9549 | highpc += baseaddr; | |
9550 | ||
9551 | push_context (0, lowpc); | |
639d11d3 | 9552 | if (die->child != NULL) |
c906108c | 9553 | { |
639d11d3 | 9554 | child_die = die->child; |
c906108c SS |
9555 | while (child_die && child_die->tag) |
9556 | { | |
e7c27a73 | 9557 | process_die (child_die, cu); |
c906108c SS |
9558 | child_die = sibling_die (child_die); |
9559 | } | |
9560 | } | |
9561 | new = pop_context (); | |
9562 | ||
8540c487 | 9563 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 9564 | { |
801e3a5b JB |
9565 | struct block *block |
9566 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
9567 | highpc, objfile); | |
9568 | ||
9569 | /* Note that recording ranges after traversing children, as we | |
9570 | do here, means that recording a parent's ranges entails | |
9571 | walking across all its children's ranges as they appear in | |
9572 | the address map, which is quadratic behavior. | |
9573 | ||
9574 | It would be nicer to record the parent's ranges before | |
9575 | traversing its children, simply overriding whatever you find | |
9576 | there. But since we don't even decide whether to create a | |
9577 | block until after we've traversed its children, that's hard | |
9578 | to do. */ | |
9579 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
9580 | } |
9581 | local_symbols = new->locals; | |
27aa8d6a | 9582 | using_directives = new->using_directives; |
c906108c SS |
9583 | } |
9584 | ||
96408a79 SA |
9585 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
9586 | ||
9587 | static void | |
9588 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9589 | { | |
9590 | struct objfile *objfile = cu->objfile; | |
9591 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
9592 | CORE_ADDR pc, baseaddr; | |
9593 | struct attribute *attr; | |
9594 | struct call_site *call_site, call_site_local; | |
9595 | void **slot; | |
9596 | int nparams; | |
9597 | struct die_info *child_die; | |
9598 | ||
9599 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9600 | ||
9601 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
9602 | if (!attr) | |
9603 | { | |
9604 | complaint (&symfile_complaints, | |
9605 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
9606 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9607 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9608 | return; |
9609 | } | |
9610 | pc = DW_ADDR (attr) + baseaddr; | |
9611 | ||
9612 | if (cu->call_site_htab == NULL) | |
9613 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
9614 | NULL, &objfile->objfile_obstack, | |
9615 | hashtab_obstack_allocate, NULL); | |
9616 | call_site_local.pc = pc; | |
9617 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
9618 | if (*slot != NULL) | |
9619 | { | |
9620 | complaint (&symfile_complaints, | |
9621 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
9622 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9623 | paddress (gdbarch, pc), die->offset.sect_off, objfile->name); |
96408a79 SA |
9624 | return; |
9625 | } | |
9626 | ||
9627 | /* Count parameters at the caller. */ | |
9628 | ||
9629 | nparams = 0; | |
9630 | for (child_die = die->child; child_die && child_die->tag; | |
9631 | child_die = sibling_die (child_die)) | |
9632 | { | |
9633 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
9634 | { | |
9635 | complaint (&symfile_complaints, | |
9636 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
9637 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9638 | child_die->tag, child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9639 | continue; |
9640 | } | |
9641 | ||
9642 | nparams++; | |
9643 | } | |
9644 | ||
9645 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
9646 | (sizeof (*call_site) | |
9647 | + (sizeof (*call_site->parameter) | |
9648 | * (nparams - 1)))); | |
9649 | *slot = call_site; | |
9650 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
9651 | call_site->pc = pc; | |
9652 | ||
9653 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
9654 | { | |
9655 | struct die_info *func_die; | |
9656 | ||
9657 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
9658 | for (func_die = die->parent; | |
9659 | func_die && func_die->tag != DW_TAG_subprogram | |
9660 | && func_die->tag != DW_TAG_subroutine_type; | |
9661 | func_die = func_die->parent); | |
9662 | ||
9663 | /* DW_AT_GNU_all_call_sites is a superset | |
9664 | of DW_AT_GNU_all_tail_call_sites. */ | |
9665 | if (func_die | |
9666 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
9667 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
9668 | { | |
9669 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
9670 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
9671 | both the initial caller containing the real return address PC and | |
9672 | the final callee containing the current PC of a chain of tail | |
9673 | calls do not need to have the tail call list complete. But any | |
9674 | function candidate for a virtual tail call frame searched via | |
9675 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
9676 | determined unambiguously. */ | |
9677 | } | |
9678 | else | |
9679 | { | |
9680 | struct type *func_type = NULL; | |
9681 | ||
9682 | if (func_die) | |
9683 | func_type = get_die_type (func_die, cu); | |
9684 | if (func_type != NULL) | |
9685 | { | |
9686 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
9687 | ||
9688 | /* Enlist this call site to the function. */ | |
9689 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
9690 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
9691 | } | |
9692 | else | |
9693 | complaint (&symfile_complaints, | |
9694 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
9695 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9696 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9697 | } |
9698 | } | |
9699 | ||
9700 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
9701 | if (attr == NULL) | |
9702 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9703 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
9704 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
9705 | /* Keep NULL DWARF_BLOCK. */; | |
9706 | else if (attr_form_is_block (attr)) | |
9707 | { | |
9708 | struct dwarf2_locexpr_baton *dlbaton; | |
9709 | ||
9710 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
9711 | dlbaton->data = DW_BLOCK (attr)->data; | |
9712 | dlbaton->size = DW_BLOCK (attr)->size; | |
9713 | dlbaton->per_cu = cu->per_cu; | |
9714 | ||
9715 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
9716 | } | |
9717 | else if (is_ref_attr (attr)) | |
9718 | { | |
96408a79 SA |
9719 | struct dwarf2_cu *target_cu = cu; |
9720 | struct die_info *target_die; | |
9721 | ||
9722 | target_die = follow_die_ref_or_sig (die, attr, &target_cu); | |
9723 | gdb_assert (target_cu->objfile == objfile); | |
9724 | if (die_is_declaration (target_die, target_cu)) | |
9725 | { | |
9726 | const char *target_physname; | |
9727 | ||
9728 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
9729 | if (target_physname == NULL) | |
9730 | complaint (&symfile_complaints, | |
9731 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9732 | "physname, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9733 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9734 | else |
9735 | SET_FIELD_PHYSNAME (call_site->target, (char *) target_physname); | |
9736 | } | |
9737 | else | |
9738 | { | |
9739 | CORE_ADDR lowpc; | |
9740 | ||
9741 | /* DW_AT_entry_pc should be preferred. */ | |
9742 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
9743 | complaint (&symfile_complaints, | |
9744 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9745 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9746 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9747 | else |
9748 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
9749 | } | |
9750 | } | |
9751 | else | |
9752 | complaint (&symfile_complaints, | |
9753 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
9754 | "block nor reference, for DIE 0x%x [in module %s]"), | |
b64f50a1 | 9755 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9756 | |
9757 | call_site->per_cu = cu->per_cu; | |
9758 | ||
9759 | for (child_die = die->child; | |
9760 | child_die && child_die->tag; | |
9761 | child_die = sibling_die (child_die)) | |
9762 | { | |
96408a79 | 9763 | struct call_site_parameter *parameter; |
1788b2d3 | 9764 | struct attribute *loc, *origin; |
96408a79 SA |
9765 | |
9766 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
9767 | { | |
9768 | /* Already printed the complaint above. */ | |
9769 | continue; | |
9770 | } | |
9771 | ||
9772 | gdb_assert (call_site->parameter_count < nparams); | |
9773 | parameter = &call_site->parameter[call_site->parameter_count]; | |
9774 | ||
1788b2d3 JK |
9775 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
9776 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
9777 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 9778 | |
24c5c679 | 9779 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 JK |
9780 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
9781 | if (loc == NULL && origin != NULL && is_ref_attr (origin)) | |
9782 | { | |
9783 | sect_offset offset; | |
9784 | ||
9785 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
9786 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
9787 | if (!offset_in_cu_p (&cu->header, offset)) |
9788 | { | |
9789 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
9790 | binding can be done only inside one CU. Such referenced DIE | |
9791 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
9792 | complaint (&symfile_complaints, | |
9793 | _("DW_AT_abstract_origin offset is not in CU for " | |
9794 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
9795 | "[in module %s]"), | |
9796 | child_die->offset.sect_off, objfile->name); | |
9797 | continue; | |
9798 | } | |
1788b2d3 JK |
9799 | parameter->u.param_offset.cu_off = (offset.sect_off |
9800 | - cu->header.offset.sect_off); | |
9801 | } | |
9802 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
9803 | { |
9804 | complaint (&symfile_complaints, | |
9805 | _("No DW_FORM_block* DW_AT_location for " | |
9806 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9807 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9808 | continue; |
9809 | } | |
24c5c679 | 9810 | else |
96408a79 | 9811 | { |
24c5c679 JK |
9812 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
9813 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
9814 | if (parameter->u.dwarf_reg != -1) | |
9815 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
9816 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
9817 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
9818 | ¶meter->u.fb_offset)) | |
9819 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
9820 | else | |
9821 | { | |
9822 | complaint (&symfile_complaints, | |
9823 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
9824 | "for DW_FORM_block* DW_AT_location is supported for " | |
9825 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
9826 | "[in module %s]"), | |
9827 | child_die->offset.sect_off, objfile->name); | |
9828 | continue; | |
9829 | } | |
96408a79 SA |
9830 | } |
9831 | ||
9832 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
9833 | if (!attr_form_is_block (attr)) | |
9834 | { | |
9835 | complaint (&symfile_complaints, | |
9836 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
9837 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9838 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9839 | continue; |
9840 | } | |
9841 | parameter->value = DW_BLOCK (attr)->data; | |
9842 | parameter->value_size = DW_BLOCK (attr)->size; | |
9843 | ||
9844 | /* Parameters are not pre-cleared by memset above. */ | |
9845 | parameter->data_value = NULL; | |
9846 | parameter->data_value_size = 0; | |
9847 | call_site->parameter_count++; | |
9848 | ||
9849 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
9850 | if (attr) | |
9851 | { | |
9852 | if (!attr_form_is_block (attr)) | |
9853 | complaint (&symfile_complaints, | |
9854 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
9855 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9856 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9857 | else |
9858 | { | |
9859 | parameter->data_value = DW_BLOCK (attr)->data; | |
9860 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
9861 | } | |
9862 | } | |
9863 | } | |
9864 | } | |
9865 | ||
43039443 | 9866 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
9867 | Return 1 if the attributes are present and valid, otherwise, return 0. |
9868 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
9869 | |
9870 | static int | |
9871 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
9872 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
9873 | struct partial_symtab *ranges_pst) | |
43039443 JK |
9874 | { |
9875 | struct objfile *objfile = cu->objfile; | |
9876 | struct comp_unit_head *cu_header = &cu->header; | |
9877 | bfd *obfd = objfile->obfd; | |
9878 | unsigned int addr_size = cu_header->addr_size; | |
9879 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
9880 | /* Base address selection entry. */ | |
9881 | CORE_ADDR base; | |
9882 | int found_base; | |
9883 | unsigned int dummy; | |
9884 | gdb_byte *buffer; | |
9885 | CORE_ADDR marker; | |
9886 | int low_set; | |
9887 | CORE_ADDR low = 0; | |
9888 | CORE_ADDR high = 0; | |
ff013f42 | 9889 | CORE_ADDR baseaddr; |
43039443 | 9890 | |
d00adf39 DE |
9891 | found_base = cu->base_known; |
9892 | base = cu->base_address; | |
43039443 | 9893 | |
be391dca | 9894 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 9895 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
9896 | { |
9897 | complaint (&symfile_complaints, | |
9898 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
9899 | offset); | |
9900 | return 0; | |
9901 | } | |
dce234bc | 9902 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
9903 | |
9904 | /* Read in the largest possible address. */ | |
9905 | marker = read_address (obfd, buffer, cu, &dummy); | |
9906 | if ((marker & mask) == mask) | |
9907 | { | |
9908 | /* If we found the largest possible address, then | |
9909 | read the base address. */ | |
9910 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
9911 | buffer += 2 * addr_size; | |
9912 | offset += 2 * addr_size; | |
9913 | found_base = 1; | |
9914 | } | |
9915 | ||
9916 | low_set = 0; | |
9917 | ||
e7030f15 | 9918 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 9919 | |
43039443 JK |
9920 | while (1) |
9921 | { | |
9922 | CORE_ADDR range_beginning, range_end; | |
9923 | ||
9924 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
9925 | buffer += addr_size; | |
9926 | range_end = read_address (obfd, buffer, cu, &dummy); | |
9927 | buffer += addr_size; | |
9928 | offset += 2 * addr_size; | |
9929 | ||
9930 | /* An end of list marker is a pair of zero addresses. */ | |
9931 | if (range_beginning == 0 && range_end == 0) | |
9932 | /* Found the end of list entry. */ | |
9933 | break; | |
9934 | ||
9935 | /* Each base address selection entry is a pair of 2 values. | |
9936 | The first is the largest possible address, the second is | |
9937 | the base address. Check for a base address here. */ | |
9938 | if ((range_beginning & mask) == mask) | |
9939 | { | |
9940 | /* If we found the largest possible address, then | |
9941 | read the base address. */ | |
9942 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
9943 | found_base = 1; | |
9944 | continue; | |
9945 | } | |
9946 | ||
9947 | if (!found_base) | |
9948 | { | |
9949 | /* We have no valid base address for the ranges | |
9950 | data. */ | |
9951 | complaint (&symfile_complaints, | |
9952 | _("Invalid .debug_ranges data (no base address)")); | |
9953 | return 0; | |
9954 | } | |
9955 | ||
9277c30c UW |
9956 | if (range_beginning > range_end) |
9957 | { | |
9958 | /* Inverted range entries are invalid. */ | |
9959 | complaint (&symfile_complaints, | |
9960 | _("Invalid .debug_ranges data (inverted range)")); | |
9961 | return 0; | |
9962 | } | |
9963 | ||
9964 | /* Empty range entries have no effect. */ | |
9965 | if (range_beginning == range_end) | |
9966 | continue; | |
9967 | ||
43039443 JK |
9968 | range_beginning += base; |
9969 | range_end += base; | |
9970 | ||
01093045 DE |
9971 | /* A not-uncommon case of bad debug info. |
9972 | Don't pollute the addrmap with bad data. */ | |
9973 | if (range_beginning + baseaddr == 0 | |
9974 | && !dwarf2_per_objfile->has_section_at_zero) | |
9975 | { | |
9976 | complaint (&symfile_complaints, | |
9977 | _(".debug_ranges entry has start address of zero" | |
9978 | " [in module %s]"), objfile->name); | |
9979 | continue; | |
9980 | } | |
9981 | ||
9277c30c | 9982 | if (ranges_pst != NULL) |
ff013f42 | 9983 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
9984 | range_beginning + baseaddr, |
9985 | range_end - 1 + baseaddr, | |
ff013f42 JK |
9986 | ranges_pst); |
9987 | ||
43039443 JK |
9988 | /* FIXME: This is recording everything as a low-high |
9989 | segment of consecutive addresses. We should have a | |
9990 | data structure for discontiguous block ranges | |
9991 | instead. */ | |
9992 | if (! low_set) | |
9993 | { | |
9994 | low = range_beginning; | |
9995 | high = range_end; | |
9996 | low_set = 1; | |
9997 | } | |
9998 | else | |
9999 | { | |
10000 | if (range_beginning < low) | |
10001 | low = range_beginning; | |
10002 | if (range_end > high) | |
10003 | high = range_end; | |
10004 | } | |
10005 | } | |
10006 | ||
10007 | if (! low_set) | |
10008 | /* If the first entry is an end-of-list marker, the range | |
10009 | describes an empty scope, i.e. no instructions. */ | |
10010 | return 0; | |
10011 | ||
10012 | if (low_return) | |
10013 | *low_return = low; | |
10014 | if (high_return) | |
10015 | *high_return = high; | |
10016 | return 1; | |
10017 | } | |
10018 | ||
af34e669 DJ |
10019 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
10020 | are present and valid, otherwise, return 0. Return -1 if the range is | |
10021 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 10022 | |
c906108c | 10023 | static int |
af34e669 | 10024 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
10025 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
10026 | struct partial_symtab *pst) | |
c906108c SS |
10027 | { |
10028 | struct attribute *attr; | |
91da1414 | 10029 | struct attribute *attr_high; |
af34e669 DJ |
10030 | CORE_ADDR low = 0; |
10031 | CORE_ADDR high = 0; | |
10032 | int ret = 0; | |
c906108c | 10033 | |
91da1414 MW |
10034 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10035 | if (attr_high) | |
af34e669 | 10036 | { |
e142c38c | 10037 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 10038 | if (attr) |
91da1414 MW |
10039 | { |
10040 | low = DW_ADDR (attr); | |
3019eac3 DE |
10041 | if (attr_high->form == DW_FORM_addr |
10042 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10043 | high = DW_ADDR (attr_high); |
10044 | else | |
10045 | high = low + DW_UNSND (attr_high); | |
10046 | } | |
af34e669 DJ |
10047 | else |
10048 | /* Found high w/o low attribute. */ | |
10049 | return 0; | |
10050 | ||
10051 | /* Found consecutive range of addresses. */ | |
10052 | ret = 1; | |
10053 | } | |
c906108c | 10054 | else |
af34e669 | 10055 | { |
e142c38c | 10056 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
10057 | if (attr != NULL) |
10058 | { | |
2e3cf129 DE |
10059 | unsigned int ranges_offset = DW_UNSND (attr) + cu->ranges_base; |
10060 | ||
af34e669 | 10061 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 10062 | .debug_ranges section. */ |
2e3cf129 | 10063 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 10064 | return 0; |
43039443 | 10065 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
10066 | ret = -1; |
10067 | } | |
10068 | } | |
c906108c | 10069 | |
9373cf26 JK |
10070 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
10071 | if (high <= low) | |
c906108c SS |
10072 | return 0; |
10073 | ||
10074 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
10075 | eliminate duplicate copies of functions and vtables and such. | |
10076 | The linker will arbitrarily choose one and discard the others. | |
10077 | The AT_*_pc values for such functions refer to local labels in | |
10078 | these sections. If the section from that file was discarded, the | |
10079 | labels are not in the output, so the relocs get a value of 0. | |
10080 | If this is a discarded function, mark the pc bounds as invalid, | |
10081 | so that GDB will ignore it. */ | |
72dca2f5 | 10082 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
10083 | return 0; |
10084 | ||
10085 | *lowpc = low; | |
96408a79 SA |
10086 | if (highpc) |
10087 | *highpc = high; | |
af34e669 | 10088 | return ret; |
c906108c SS |
10089 | } |
10090 | ||
b084d499 JB |
10091 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
10092 | its low and high PC addresses. Do nothing if these addresses could not | |
10093 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
10094 | and HIGHPC to the high address if greater than HIGHPC. */ | |
10095 | ||
10096 | static void | |
10097 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
10098 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10099 | struct dwarf2_cu *cu) | |
10100 | { | |
10101 | CORE_ADDR low, high; | |
10102 | struct die_info *child = die->child; | |
10103 | ||
d85a05f0 | 10104 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
10105 | { |
10106 | *lowpc = min (*lowpc, low); | |
10107 | *highpc = max (*highpc, high); | |
10108 | } | |
10109 | ||
10110 | /* If the language does not allow nested subprograms (either inside | |
10111 | subprograms or lexical blocks), we're done. */ | |
10112 | if (cu->language != language_ada) | |
10113 | return; | |
6e70227d | 10114 | |
b084d499 JB |
10115 | /* Check all the children of the given DIE. If it contains nested |
10116 | subprograms, then check their pc bounds. Likewise, we need to | |
10117 | check lexical blocks as well, as they may also contain subprogram | |
10118 | definitions. */ | |
10119 | while (child && child->tag) | |
10120 | { | |
10121 | if (child->tag == DW_TAG_subprogram | |
10122 | || child->tag == DW_TAG_lexical_block) | |
10123 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
10124 | child = sibling_die (child); | |
10125 | } | |
10126 | } | |
10127 | ||
fae299cd DC |
10128 | /* Get the low and high pc's represented by the scope DIE, and store |
10129 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
10130 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
10131 | ||
10132 | static void | |
10133 | get_scope_pc_bounds (struct die_info *die, | |
10134 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10135 | struct dwarf2_cu *cu) | |
10136 | { | |
10137 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
10138 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
10139 | CORE_ADDR current_low, current_high; | |
10140 | ||
d85a05f0 | 10141 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
10142 | { |
10143 | best_low = current_low; | |
10144 | best_high = current_high; | |
10145 | } | |
10146 | else | |
10147 | { | |
10148 | struct die_info *child = die->child; | |
10149 | ||
10150 | while (child && child->tag) | |
10151 | { | |
10152 | switch (child->tag) { | |
10153 | case DW_TAG_subprogram: | |
b084d499 | 10154 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
10155 | break; |
10156 | case DW_TAG_namespace: | |
f55ee35c | 10157 | case DW_TAG_module: |
fae299cd DC |
10158 | /* FIXME: carlton/2004-01-16: Should we do this for |
10159 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
10160 | that current GCC's always emit the DIEs corresponding | |
10161 | to definitions of methods of classes as children of a | |
10162 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
10163 | the DIEs giving the declarations, which could be | |
10164 | anywhere). But I don't see any reason why the | |
10165 | standards says that they have to be there. */ | |
10166 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
10167 | ||
10168 | if (current_low != ((CORE_ADDR) -1)) | |
10169 | { | |
10170 | best_low = min (best_low, current_low); | |
10171 | best_high = max (best_high, current_high); | |
10172 | } | |
10173 | break; | |
10174 | default: | |
0963b4bd | 10175 | /* Ignore. */ |
fae299cd DC |
10176 | break; |
10177 | } | |
10178 | ||
10179 | child = sibling_die (child); | |
10180 | } | |
10181 | } | |
10182 | ||
10183 | *lowpc = best_low; | |
10184 | *highpc = best_high; | |
10185 | } | |
10186 | ||
801e3a5b JB |
10187 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
10188 | in DIE. */ | |
380bca97 | 10189 | |
801e3a5b JB |
10190 | static void |
10191 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
10192 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
10193 | { | |
bb5ed363 | 10194 | struct objfile *objfile = cu->objfile; |
801e3a5b | 10195 | struct attribute *attr; |
91da1414 | 10196 | struct attribute *attr_high; |
801e3a5b | 10197 | |
91da1414 MW |
10198 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10199 | if (attr_high) | |
801e3a5b | 10200 | { |
801e3a5b JB |
10201 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
10202 | if (attr) | |
10203 | { | |
10204 | CORE_ADDR low = DW_ADDR (attr); | |
91da1414 | 10205 | CORE_ADDR high; |
3019eac3 DE |
10206 | if (attr_high->form == DW_FORM_addr |
10207 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10208 | high = DW_ADDR (attr_high); |
10209 | else | |
10210 | high = low + DW_UNSND (attr_high); | |
9a619af0 | 10211 | |
801e3a5b JB |
10212 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
10213 | } | |
10214 | } | |
10215 | ||
10216 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
10217 | if (attr) | |
10218 | { | |
bb5ed363 | 10219 | bfd *obfd = objfile->obfd; |
801e3a5b JB |
10220 | |
10221 | /* The value of the DW_AT_ranges attribute is the offset of the | |
10222 | address range list in the .debug_ranges section. */ | |
2e3cf129 | 10223 | unsigned long offset = DW_UNSND (attr) + cu->ranges_base; |
dce234bc | 10224 | gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
10225 | |
10226 | /* For some target architectures, but not others, the | |
10227 | read_address function sign-extends the addresses it returns. | |
10228 | To recognize base address selection entries, we need a | |
10229 | mask. */ | |
10230 | unsigned int addr_size = cu->header.addr_size; | |
10231 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10232 | ||
10233 | /* The base address, to which the next pair is relative. Note | |
10234 | that this 'base' is a DWARF concept: most entries in a range | |
10235 | list are relative, to reduce the number of relocs against the | |
10236 | debugging information. This is separate from this function's | |
10237 | 'baseaddr' argument, which GDB uses to relocate debugging | |
10238 | information from a shared library based on the address at | |
10239 | which the library was loaded. */ | |
d00adf39 DE |
10240 | CORE_ADDR base = cu->base_address; |
10241 | int base_known = cu->base_known; | |
801e3a5b | 10242 | |
be391dca | 10243 | gdb_assert (dwarf2_per_objfile->ranges.readin); |
dce234bc | 10244 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
10245 | { |
10246 | complaint (&symfile_complaints, | |
10247 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
10248 | offset); | |
10249 | return; | |
10250 | } | |
10251 | ||
10252 | for (;;) | |
10253 | { | |
10254 | unsigned int bytes_read; | |
10255 | CORE_ADDR start, end; | |
10256 | ||
10257 | start = read_address (obfd, buffer, cu, &bytes_read); | |
10258 | buffer += bytes_read; | |
10259 | end = read_address (obfd, buffer, cu, &bytes_read); | |
10260 | buffer += bytes_read; | |
10261 | ||
10262 | /* Did we find the end of the range list? */ | |
10263 | if (start == 0 && end == 0) | |
10264 | break; | |
10265 | ||
10266 | /* Did we find a base address selection entry? */ | |
10267 | else if ((start & base_select_mask) == base_select_mask) | |
10268 | { | |
10269 | base = end; | |
10270 | base_known = 1; | |
10271 | } | |
10272 | ||
10273 | /* We found an ordinary address range. */ | |
10274 | else | |
10275 | { | |
10276 | if (!base_known) | |
10277 | { | |
10278 | complaint (&symfile_complaints, | |
3e43a32a MS |
10279 | _("Invalid .debug_ranges data " |
10280 | "(no base address)")); | |
801e3a5b JB |
10281 | return; |
10282 | } | |
10283 | ||
9277c30c UW |
10284 | if (start > end) |
10285 | { | |
10286 | /* Inverted range entries are invalid. */ | |
10287 | complaint (&symfile_complaints, | |
10288 | _("Invalid .debug_ranges data " | |
10289 | "(inverted range)")); | |
10290 | return; | |
10291 | } | |
10292 | ||
10293 | /* Empty range entries have no effect. */ | |
10294 | if (start == end) | |
10295 | continue; | |
10296 | ||
01093045 DE |
10297 | start += base + baseaddr; |
10298 | end += base + baseaddr; | |
10299 | ||
10300 | /* A not-uncommon case of bad debug info. | |
10301 | Don't pollute the addrmap with bad data. */ | |
10302 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
10303 | { | |
10304 | complaint (&symfile_complaints, | |
10305 | _(".debug_ranges entry has start address of zero" | |
10306 | " [in module %s]"), objfile->name); | |
10307 | continue; | |
10308 | } | |
10309 | ||
10310 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
10311 | } |
10312 | } | |
10313 | } | |
10314 | } | |
10315 | ||
685b1105 JK |
10316 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
10317 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 10318 | |
685b1105 JK |
10319 | static void |
10320 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
10321 | { |
10322 | const char *cs; | |
10323 | int major, minor, release; | |
10324 | ||
10325 | if (cu->producer == NULL) | |
10326 | { | |
10327 | /* For unknown compilers expect their behavior is DWARF version | |
10328 | compliant. | |
10329 | ||
10330 | GCC started to support .debug_types sections by -gdwarf-4 since | |
10331 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
10332 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
10333 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
10334 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 10335 | } |
685b1105 | 10336 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 10337 | { |
685b1105 JK |
10338 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
10339 | ||
ba919b58 TT |
10340 | cs = &cu->producer[strlen ("GNU ")]; |
10341 | while (*cs && !isdigit (*cs)) | |
10342 | cs++; | |
10343 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
10344 | { | |
10345 | /* Not recognized as GCC. */ | |
10346 | } | |
10347 | else | |
1b80a9fa JK |
10348 | { |
10349 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
10350 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
10351 | } | |
685b1105 JK |
10352 | } |
10353 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
10354 | cu->producer_is_icc = 1; | |
10355 | else | |
10356 | { | |
10357 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
10358 | compliant. */ | |
60d5a603 JK |
10359 | } |
10360 | ||
ba919b58 | 10361 | cu->checked_producer = 1; |
685b1105 | 10362 | } |
ba919b58 | 10363 | |
685b1105 JK |
10364 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
10365 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
10366 | during 4.6.0 experimental. */ | |
10367 | ||
10368 | static int | |
10369 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
10370 | { | |
10371 | if (!cu->checked_producer) | |
10372 | check_producer (cu); | |
10373 | ||
10374 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
10375 | } |
10376 | ||
10377 | /* Return the default accessibility type if it is not overriden by | |
10378 | DW_AT_accessibility. */ | |
10379 | ||
10380 | static enum dwarf_access_attribute | |
10381 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
10382 | { | |
10383 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
10384 | { | |
10385 | /* The default DWARF 2 accessibility for members is public, the default | |
10386 | accessibility for inheritance is private. */ | |
10387 | ||
10388 | if (die->tag != DW_TAG_inheritance) | |
10389 | return DW_ACCESS_public; | |
10390 | else | |
10391 | return DW_ACCESS_private; | |
10392 | } | |
10393 | else | |
10394 | { | |
10395 | /* DWARF 3+ defines the default accessibility a different way. The same | |
10396 | rules apply now for DW_TAG_inheritance as for the members and it only | |
10397 | depends on the container kind. */ | |
10398 | ||
10399 | if (die->parent->tag == DW_TAG_class_type) | |
10400 | return DW_ACCESS_private; | |
10401 | else | |
10402 | return DW_ACCESS_public; | |
10403 | } | |
10404 | } | |
10405 | ||
74ac6d43 TT |
10406 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
10407 | offset. If the attribute was not found return 0, otherwise return | |
10408 | 1. If it was found but could not properly be handled, set *OFFSET | |
10409 | to 0. */ | |
10410 | ||
10411 | static int | |
10412 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
10413 | LONGEST *offset) | |
10414 | { | |
10415 | struct attribute *attr; | |
10416 | ||
10417 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
10418 | if (attr != NULL) | |
10419 | { | |
10420 | *offset = 0; | |
10421 | ||
10422 | /* Note that we do not check for a section offset first here. | |
10423 | This is because DW_AT_data_member_location is new in DWARF 4, | |
10424 | so if we see it, we can assume that a constant form is really | |
10425 | a constant and not a section offset. */ | |
10426 | if (attr_form_is_constant (attr)) | |
10427 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
10428 | else if (attr_form_is_section_offset (attr)) | |
10429 | dwarf2_complex_location_expr_complaint (); | |
10430 | else if (attr_form_is_block (attr)) | |
10431 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
10432 | else | |
10433 | dwarf2_complex_location_expr_complaint (); | |
10434 | ||
10435 | return 1; | |
10436 | } | |
10437 | ||
10438 | return 0; | |
10439 | } | |
10440 | ||
c906108c SS |
10441 | /* Add an aggregate field to the field list. */ |
10442 | ||
10443 | static void | |
107d2387 | 10444 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 10445 | struct dwarf2_cu *cu) |
6e70227d | 10446 | { |
e7c27a73 | 10447 | struct objfile *objfile = cu->objfile; |
5e2b427d | 10448 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
10449 | struct nextfield *new_field; |
10450 | struct attribute *attr; | |
10451 | struct field *fp; | |
10452 | char *fieldname = ""; | |
10453 | ||
10454 | /* Allocate a new field list entry and link it in. */ | |
10455 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 10456 | make_cleanup (xfree, new_field); |
c906108c | 10457 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
10458 | |
10459 | if (die->tag == DW_TAG_inheritance) | |
10460 | { | |
10461 | new_field->next = fip->baseclasses; | |
10462 | fip->baseclasses = new_field; | |
10463 | } | |
10464 | else | |
10465 | { | |
10466 | new_field->next = fip->fields; | |
10467 | fip->fields = new_field; | |
10468 | } | |
c906108c SS |
10469 | fip->nfields++; |
10470 | ||
e142c38c | 10471 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
10472 | if (attr) |
10473 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
10474 | else |
10475 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
10476 | if (new_field->accessibility != DW_ACCESS_public) |
10477 | fip->non_public_fields = 1; | |
60d5a603 | 10478 | |
e142c38c | 10479 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
10480 | if (attr) |
10481 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
10482 | else |
10483 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
10484 | |
10485 | fp = &new_field->field; | |
a9a9bd0f | 10486 | |
e142c38c | 10487 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 10488 | { |
74ac6d43 TT |
10489 | LONGEST offset; |
10490 | ||
a9a9bd0f | 10491 | /* Data member other than a C++ static data member. */ |
6e70227d | 10492 | |
c906108c | 10493 | /* Get type of field. */ |
e7c27a73 | 10494 | fp->type = die_type (die, cu); |
c906108c | 10495 | |
d6a843b5 | 10496 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 10497 | |
c906108c | 10498 | /* Get bit size of field (zero if none). */ |
e142c38c | 10499 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
10500 | if (attr) |
10501 | { | |
10502 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
10503 | } | |
10504 | else | |
10505 | { | |
10506 | FIELD_BITSIZE (*fp) = 0; | |
10507 | } | |
10508 | ||
10509 | /* Get bit offset of field. */ | |
74ac6d43 TT |
10510 | if (handle_data_member_location (die, cu, &offset)) |
10511 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 10512 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
10513 | if (attr) |
10514 | { | |
5e2b427d | 10515 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
10516 | { |
10517 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
10518 | additional bit offset from the MSB of the containing |
10519 | anonymous object to the MSB of the field. We don't | |
10520 | have to do anything special since we don't need to | |
10521 | know the size of the anonymous object. */ | |
f41f5e61 | 10522 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
10523 | } |
10524 | else | |
10525 | { | |
10526 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
10527 | MSB of the anonymous object, subtract off the number of |
10528 | bits from the MSB of the field to the MSB of the | |
10529 | object, and then subtract off the number of bits of | |
10530 | the field itself. The result is the bit offset of | |
10531 | the LSB of the field. */ | |
c906108c SS |
10532 | int anonymous_size; |
10533 | int bit_offset = DW_UNSND (attr); | |
10534 | ||
e142c38c | 10535 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
10536 | if (attr) |
10537 | { | |
10538 | /* The size of the anonymous object containing | |
10539 | the bit field is explicit, so use the | |
10540 | indicated size (in bytes). */ | |
10541 | anonymous_size = DW_UNSND (attr); | |
10542 | } | |
10543 | else | |
10544 | { | |
10545 | /* The size of the anonymous object containing | |
10546 | the bit field must be inferred from the type | |
10547 | attribute of the data member containing the | |
10548 | bit field. */ | |
10549 | anonymous_size = TYPE_LENGTH (fp->type); | |
10550 | } | |
f41f5e61 PA |
10551 | SET_FIELD_BITPOS (*fp, |
10552 | (FIELD_BITPOS (*fp) | |
10553 | + anonymous_size * bits_per_byte | |
10554 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
10555 | } |
10556 | } | |
10557 | ||
10558 | /* Get name of field. */ | |
39cbfefa DJ |
10559 | fieldname = dwarf2_name (die, cu); |
10560 | if (fieldname == NULL) | |
10561 | fieldname = ""; | |
d8151005 DJ |
10562 | |
10563 | /* The name is already allocated along with this objfile, so we don't | |
10564 | need to duplicate it for the type. */ | |
10565 | fp->name = fieldname; | |
c906108c SS |
10566 | |
10567 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 10568 | pointer or virtual base class pointer) to private. */ |
e142c38c | 10569 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 10570 | { |
d48cc9dd | 10571 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
10572 | new_field->accessibility = DW_ACCESS_private; |
10573 | fip->non_public_fields = 1; | |
10574 | } | |
10575 | } | |
a9a9bd0f | 10576 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 10577 | { |
a9a9bd0f DC |
10578 | /* C++ static member. */ |
10579 | ||
10580 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
10581 | is a declaration, but all versions of G++ as of this writing | |
10582 | (so through at least 3.2.1) incorrectly generate | |
10583 | DW_TAG_variable tags. */ | |
6e70227d | 10584 | |
ff355380 | 10585 | const char *physname; |
c906108c | 10586 | |
a9a9bd0f | 10587 | /* Get name of field. */ |
39cbfefa DJ |
10588 | fieldname = dwarf2_name (die, cu); |
10589 | if (fieldname == NULL) | |
c906108c SS |
10590 | return; |
10591 | ||
254e6b9e | 10592 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
10593 | if (attr |
10594 | /* Only create a symbol if this is an external value. | |
10595 | new_symbol checks this and puts the value in the global symbol | |
10596 | table, which we want. If it is not external, new_symbol | |
10597 | will try to put the value in cu->list_in_scope which is wrong. */ | |
10598 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
10599 | { |
10600 | /* A static const member, not much different than an enum as far as | |
10601 | we're concerned, except that we can support more types. */ | |
10602 | new_symbol (die, NULL, cu); | |
10603 | } | |
10604 | ||
2df3850c | 10605 | /* Get physical name. */ |
ff355380 | 10606 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 10607 | |
d8151005 DJ |
10608 | /* The name is already allocated along with this objfile, so we don't |
10609 | need to duplicate it for the type. */ | |
10610 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 10611 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 10612 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
10613 | } |
10614 | else if (die->tag == DW_TAG_inheritance) | |
10615 | { | |
74ac6d43 | 10616 | LONGEST offset; |
d4b96c9a | 10617 | |
74ac6d43 TT |
10618 | /* C++ base class field. */ |
10619 | if (handle_data_member_location (die, cu, &offset)) | |
10620 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 10621 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 10622 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
10623 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
10624 | fip->nbaseclasses++; | |
10625 | } | |
10626 | } | |
10627 | ||
98751a41 JK |
10628 | /* Add a typedef defined in the scope of the FIP's class. */ |
10629 | ||
10630 | static void | |
10631 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
10632 | struct dwarf2_cu *cu) | |
6e70227d | 10633 | { |
98751a41 | 10634 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
10635 | struct typedef_field_list *new_field; |
10636 | struct attribute *attr; | |
10637 | struct typedef_field *fp; | |
10638 | char *fieldname = ""; | |
10639 | ||
10640 | /* Allocate a new field list entry and link it in. */ | |
10641 | new_field = xzalloc (sizeof (*new_field)); | |
10642 | make_cleanup (xfree, new_field); | |
10643 | ||
10644 | gdb_assert (die->tag == DW_TAG_typedef); | |
10645 | ||
10646 | fp = &new_field->field; | |
10647 | ||
10648 | /* Get name of field. */ | |
10649 | fp->name = dwarf2_name (die, cu); | |
10650 | if (fp->name == NULL) | |
10651 | return; | |
10652 | ||
10653 | fp->type = read_type_die (die, cu); | |
10654 | ||
10655 | new_field->next = fip->typedef_field_list; | |
10656 | fip->typedef_field_list = new_field; | |
10657 | fip->typedef_field_list_count++; | |
10658 | } | |
10659 | ||
c906108c SS |
10660 | /* Create the vector of fields, and attach it to the type. */ |
10661 | ||
10662 | static void | |
fba45db2 | 10663 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 10664 | struct dwarf2_cu *cu) |
c906108c SS |
10665 | { |
10666 | int nfields = fip->nfields; | |
10667 | ||
10668 | /* Record the field count, allocate space for the array of fields, | |
10669 | and create blank accessibility bitfields if necessary. */ | |
10670 | TYPE_NFIELDS (type) = nfields; | |
10671 | TYPE_FIELDS (type) = (struct field *) | |
10672 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
10673 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
10674 | ||
b4ba55a1 | 10675 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
10676 | { |
10677 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
10678 | ||
10679 | TYPE_FIELD_PRIVATE_BITS (type) = | |
10680 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10681 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
10682 | ||
10683 | TYPE_FIELD_PROTECTED_BITS (type) = | |
10684 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10685 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
10686 | ||
774b6a14 TT |
10687 | TYPE_FIELD_IGNORE_BITS (type) = |
10688 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10689 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
10690 | } |
10691 | ||
10692 | /* If the type has baseclasses, allocate and clear a bit vector for | |
10693 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 10694 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
10695 | { |
10696 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 10697 | unsigned char *pointer; |
c906108c SS |
10698 | |
10699 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
10700 | pointer = TYPE_ALLOC (type, num_bytes); |
10701 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
10702 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
10703 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
10704 | } | |
10705 | ||
3e43a32a MS |
10706 | /* Copy the saved-up fields into the field vector. Start from the head of |
10707 | the list, adding to the tail of the field array, so that they end up in | |
10708 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
10709 | while (nfields-- > 0) |
10710 | { | |
7d0ccb61 DJ |
10711 | struct nextfield *fieldp; |
10712 | ||
10713 | if (fip->fields) | |
10714 | { | |
10715 | fieldp = fip->fields; | |
10716 | fip->fields = fieldp->next; | |
10717 | } | |
10718 | else | |
10719 | { | |
10720 | fieldp = fip->baseclasses; | |
10721 | fip->baseclasses = fieldp->next; | |
10722 | } | |
10723 | ||
10724 | TYPE_FIELD (type, nfields) = fieldp->field; | |
10725 | switch (fieldp->accessibility) | |
c906108c | 10726 | { |
c5aa993b | 10727 | case DW_ACCESS_private: |
b4ba55a1 JB |
10728 | if (cu->language != language_ada) |
10729 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 10730 | break; |
c906108c | 10731 | |
c5aa993b | 10732 | case DW_ACCESS_protected: |
b4ba55a1 JB |
10733 | if (cu->language != language_ada) |
10734 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 10735 | break; |
c906108c | 10736 | |
c5aa993b JM |
10737 | case DW_ACCESS_public: |
10738 | break; | |
c906108c | 10739 | |
c5aa993b JM |
10740 | default: |
10741 | /* Unknown accessibility. Complain and treat it as public. */ | |
10742 | { | |
e2e0b3e5 | 10743 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 10744 | fieldp->accessibility); |
c5aa993b JM |
10745 | } |
10746 | break; | |
c906108c SS |
10747 | } |
10748 | if (nfields < fip->nbaseclasses) | |
10749 | { | |
7d0ccb61 | 10750 | switch (fieldp->virtuality) |
c906108c | 10751 | { |
c5aa993b JM |
10752 | case DW_VIRTUALITY_virtual: |
10753 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 10754 | if (cu->language == language_ada) |
a73c6dcd | 10755 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
10756 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
10757 | break; | |
c906108c SS |
10758 | } |
10759 | } | |
c906108c SS |
10760 | } |
10761 | } | |
10762 | ||
c906108c SS |
10763 | /* Add a member function to the proper fieldlist. */ |
10764 | ||
10765 | static void | |
107d2387 | 10766 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 10767 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 10768 | { |
e7c27a73 | 10769 | struct objfile *objfile = cu->objfile; |
c906108c SS |
10770 | struct attribute *attr; |
10771 | struct fnfieldlist *flp; | |
10772 | int i; | |
10773 | struct fn_field *fnp; | |
10774 | char *fieldname; | |
c906108c | 10775 | struct nextfnfield *new_fnfield; |
f792889a | 10776 | struct type *this_type; |
60d5a603 | 10777 | enum dwarf_access_attribute accessibility; |
c906108c | 10778 | |
b4ba55a1 | 10779 | if (cu->language == language_ada) |
a73c6dcd | 10780 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 10781 | |
2df3850c | 10782 | /* Get name of member function. */ |
39cbfefa DJ |
10783 | fieldname = dwarf2_name (die, cu); |
10784 | if (fieldname == NULL) | |
2df3850c | 10785 | return; |
c906108c | 10786 | |
c906108c SS |
10787 | /* Look up member function name in fieldlist. */ |
10788 | for (i = 0; i < fip->nfnfields; i++) | |
10789 | { | |
27bfe10e | 10790 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
10791 | break; |
10792 | } | |
10793 | ||
10794 | /* Create new list element if necessary. */ | |
10795 | if (i < fip->nfnfields) | |
10796 | flp = &fip->fnfieldlists[i]; | |
10797 | else | |
10798 | { | |
10799 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
10800 | { | |
10801 | fip->fnfieldlists = (struct fnfieldlist *) | |
10802 | xrealloc (fip->fnfieldlists, | |
10803 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 10804 | * sizeof (struct fnfieldlist)); |
c906108c | 10805 | if (fip->nfnfields == 0) |
c13c43fd | 10806 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
10807 | } |
10808 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
10809 | flp->name = fieldname; | |
10810 | flp->length = 0; | |
10811 | flp->head = NULL; | |
3da10d80 | 10812 | i = fip->nfnfields++; |
c906108c SS |
10813 | } |
10814 | ||
10815 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 10816 | entry. */ |
c906108c | 10817 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 10818 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
10819 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
10820 | new_fnfield->next = flp->head; | |
10821 | flp->head = new_fnfield; | |
10822 | flp->length++; | |
10823 | ||
10824 | /* Fill in the member function field info. */ | |
10825 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
10826 | |
10827 | /* Delay processing of the physname until later. */ | |
10828 | if (cu->language == language_cplus || cu->language == language_java) | |
10829 | { | |
10830 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
10831 | die, cu); | |
10832 | } | |
10833 | else | |
10834 | { | |
1d06ead6 | 10835 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
10836 | fnp->physname = physname ? physname : ""; |
10837 | } | |
10838 | ||
c906108c | 10839 | fnp->type = alloc_type (objfile); |
f792889a DJ |
10840 | this_type = read_type_die (die, cu); |
10841 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 10842 | { |
f792889a | 10843 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 10844 | |
f792889a | 10845 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
10846 | of the method itself (TYPE_CODE_METHOD). */ |
10847 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
10848 | TYPE_TARGET_TYPE (this_type), |
10849 | TYPE_FIELDS (this_type), | |
10850 | TYPE_NFIELDS (this_type), | |
10851 | TYPE_VARARGS (this_type)); | |
c906108c SS |
10852 | |
10853 | /* Handle static member functions. | |
c5aa993b | 10854 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
10855 | member functions. G++ helps GDB by marking the first |
10856 | parameter for non-static member functions (which is the this | |
10857 | pointer) as artificial. We obtain this information from | |
10858 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 10859 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
10860 | fnp->voffset = VOFFSET_STATIC; |
10861 | } | |
10862 | else | |
e2e0b3e5 | 10863 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 10864 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
10865 | |
10866 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 10867 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 10868 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 10869 | |
3e43a32a MS |
10870 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
10871 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
10872 | |
10873 | /* Get accessibility. */ | |
e142c38c | 10874 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 10875 | if (attr) |
60d5a603 JK |
10876 | accessibility = DW_UNSND (attr); |
10877 | else | |
10878 | accessibility = dwarf2_default_access_attribute (die, cu); | |
10879 | switch (accessibility) | |
c906108c | 10880 | { |
60d5a603 JK |
10881 | case DW_ACCESS_private: |
10882 | fnp->is_private = 1; | |
10883 | break; | |
10884 | case DW_ACCESS_protected: | |
10885 | fnp->is_protected = 1; | |
10886 | break; | |
c906108c SS |
10887 | } |
10888 | ||
b02dede2 | 10889 | /* Check for artificial methods. */ |
e142c38c | 10890 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
10891 | if (attr && DW_UNSND (attr) != 0) |
10892 | fnp->is_artificial = 1; | |
10893 | ||
0d564a31 | 10894 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
10895 | function. For older versions of GCC, this is an offset in the |
10896 | appropriate virtual table, as specified by DW_AT_containing_type. | |
10897 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
10898 | to the object address. */ |
10899 | ||
e142c38c | 10900 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 10901 | if (attr) |
8e19ed76 | 10902 | { |
aec5aa8b | 10903 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 10904 | { |
aec5aa8b TT |
10905 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
10906 | { | |
10907 | /* Old-style GCC. */ | |
10908 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
10909 | } | |
10910 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
10911 | || (DW_BLOCK (attr)->size > 1 | |
10912 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
10913 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
10914 | { | |
10915 | struct dwarf_block blk; | |
10916 | int offset; | |
10917 | ||
10918 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
10919 | ? 1 : 2); | |
10920 | blk.size = DW_BLOCK (attr)->size - offset; | |
10921 | blk.data = DW_BLOCK (attr)->data + offset; | |
10922 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
10923 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
10924 | dwarf2_complex_location_expr_complaint (); | |
10925 | else | |
10926 | fnp->voffset /= cu->header.addr_size; | |
10927 | fnp->voffset += 2; | |
10928 | } | |
10929 | else | |
10930 | dwarf2_complex_location_expr_complaint (); | |
10931 | ||
10932 | if (!fnp->fcontext) | |
10933 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
10934 | } | |
3690dd37 | 10935 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 10936 | { |
4d3c2250 | 10937 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
10938 | } |
10939 | else | |
10940 | { | |
4d3c2250 KB |
10941 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
10942 | fieldname); | |
8e19ed76 | 10943 | } |
0d564a31 | 10944 | } |
d48cc9dd DJ |
10945 | else |
10946 | { | |
10947 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
10948 | if (attr && DW_UNSND (attr)) | |
10949 | { | |
10950 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
10951 | complaint (&symfile_complaints, | |
3e43a32a MS |
10952 | _("Member function \"%s\" (offset %d) is virtual " |
10953 | "but the vtable offset is not specified"), | |
b64f50a1 | 10954 | fieldname, die->offset.sect_off); |
9655fd1a | 10955 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
10956 | TYPE_CPLUS_DYNAMIC (type) = 1; |
10957 | } | |
10958 | } | |
c906108c SS |
10959 | } |
10960 | ||
10961 | /* Create the vector of member function fields, and attach it to the type. */ | |
10962 | ||
10963 | static void | |
fba45db2 | 10964 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 10965 | struct dwarf2_cu *cu) |
c906108c SS |
10966 | { |
10967 | struct fnfieldlist *flp; | |
c906108c SS |
10968 | int i; |
10969 | ||
b4ba55a1 | 10970 | if (cu->language == language_ada) |
a73c6dcd | 10971 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 10972 | |
c906108c SS |
10973 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
10974 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
10975 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
10976 | ||
10977 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
10978 | { | |
10979 | struct nextfnfield *nfp = flp->head; | |
10980 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
10981 | int k; | |
10982 | ||
10983 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
10984 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
10985 | fn_flp->fn_fields = (struct fn_field *) | |
10986 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
10987 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 10988 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
10989 | } |
10990 | ||
10991 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
10992 | } |
10993 | ||
1168df01 JB |
10994 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
10995 | language, zero otherwise. */ | |
10996 | static int | |
10997 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
10998 | { | |
10999 | static const char vptr[] = "_vptr"; | |
987504bb | 11000 | static const char vtable[] = "vtable"; |
1168df01 | 11001 | |
987504bb JJ |
11002 | /* Look for the C++ and Java forms of the vtable. */ |
11003 | if ((cu->language == language_java | |
11004 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
11005 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
11006 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
11007 | return 1; |
11008 | ||
11009 | return 0; | |
11010 | } | |
11011 | ||
c0dd20ea | 11012 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
11013 | functions, with the ABI-specified layout. If TYPE describes |
11014 | such a structure, smash it into a member function type. | |
61049d3b DJ |
11015 | |
11016 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
11017 | This is GCC PR debug/28767. */ | |
c0dd20ea | 11018 | |
0b92b5bb TT |
11019 | static void |
11020 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 11021 | { |
0b92b5bb | 11022 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
11023 | |
11024 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
11025 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
11026 | return; | |
c0dd20ea DJ |
11027 | |
11028 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
11029 | if (TYPE_FIELD_NAME (type, 0) == NULL |
11030 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
11031 | || TYPE_FIELD_NAME (type, 1) == NULL | |
11032 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
11033 | return; | |
c0dd20ea DJ |
11034 | |
11035 | /* Find the type of the method. */ | |
0b92b5bb | 11036 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
11037 | if (pfn_type == NULL |
11038 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
11039 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 11040 | return; |
c0dd20ea DJ |
11041 | |
11042 | /* Look for the "this" argument. */ | |
11043 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
11044 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 11045 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 11046 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 11047 | return; |
c0dd20ea DJ |
11048 | |
11049 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
11050 | new_type = alloc_type (objfile); |
11051 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
11052 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
11053 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 11054 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 11055 | } |
1168df01 | 11056 | |
685b1105 JK |
11057 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
11058 | (icc). */ | |
11059 | ||
11060 | static int | |
11061 | producer_is_icc (struct dwarf2_cu *cu) | |
11062 | { | |
11063 | if (!cu->checked_producer) | |
11064 | check_producer (cu); | |
11065 | ||
11066 | return cu->producer_is_icc; | |
11067 | } | |
11068 | ||
c906108c | 11069 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
11070 | (definition) to create a type for the structure or union. Fill in |
11071 | the type's name and general properties; the members will not be | |
11072 | processed until process_structure_type. | |
c906108c | 11073 | |
c767944b DJ |
11074 | NOTE: we need to call these functions regardless of whether or not the |
11075 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c SS |
11076 | structure or union. This gets the type entered into our set of |
11077 | user defined types. | |
11078 | ||
11079 | However, if the structure is incomplete (an opaque struct/union) | |
11080 | then suppress creating a symbol table entry for it since gdb only | |
11081 | wants to find the one with the complete definition. Note that if | |
11082 | it is complete, we just call new_symbol, which does it's own | |
11083 | checking about whether the struct/union is anonymous or not (and | |
11084 | suppresses creating a symbol table entry itself). */ | |
11085 | ||
f792889a | 11086 | static struct type * |
134d01f1 | 11087 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11088 | { |
e7c27a73 | 11089 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11090 | struct type *type; |
11091 | struct attribute *attr; | |
39cbfefa | 11092 | char *name; |
c906108c | 11093 | |
348e048f DE |
11094 | /* If the definition of this type lives in .debug_types, read that type. |
11095 | Don't follow DW_AT_specification though, that will take us back up | |
11096 | the chain and we want to go down. */ | |
45e58e77 | 11097 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11098 | if (attr) |
11099 | { | |
11100 | struct dwarf2_cu *type_cu = cu; | |
11101 | struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu); | |
9a619af0 | 11102 | |
348e048f DE |
11103 | /* We could just recurse on read_structure_type, but we need to call |
11104 | get_die_type to ensure only one type for this DIE is created. | |
11105 | This is important, for example, because for c++ classes we need | |
11106 | TYPE_NAME set which is only done by new_symbol. Blech. */ | |
11107 | type = read_type_die (type_die, type_cu); | |
9dc481d3 DE |
11108 | |
11109 | /* TYPE_CU may not be the same as CU. | |
11110 | Ensure TYPE is recorded in CU's type_hash table. */ | |
348e048f DE |
11111 | return set_die_type (die, type, cu); |
11112 | } | |
11113 | ||
c0dd20ea | 11114 | type = alloc_type (objfile); |
c906108c | 11115 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 11116 | |
39cbfefa DJ |
11117 | name = dwarf2_name (die, cu); |
11118 | if (name != NULL) | |
c906108c | 11119 | { |
987504bb JJ |
11120 | if (cu->language == language_cplus |
11121 | || cu->language == language_java) | |
63d06c5c | 11122 | { |
3da10d80 KS |
11123 | char *full_name = (char *) dwarf2_full_name (name, die, cu); |
11124 | ||
11125 | /* dwarf2_full_name might have already finished building the DIE's | |
11126 | type. If so, there is no need to continue. */ | |
11127 | if (get_die_type (die, cu) != NULL) | |
11128 | return get_die_type (die, cu); | |
11129 | ||
11130 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
11131 | if (die->tag == DW_TAG_structure_type |
11132 | || die->tag == DW_TAG_class_type) | |
11133 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
11134 | } |
11135 | else | |
11136 | { | |
d8151005 DJ |
11137 | /* The name is already allocated along with this objfile, so |
11138 | we don't need to duplicate it for the type. */ | |
94af9270 KS |
11139 | TYPE_TAG_NAME (type) = (char *) name; |
11140 | if (die->tag == DW_TAG_class_type) | |
11141 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 11142 | } |
c906108c SS |
11143 | } |
11144 | ||
11145 | if (die->tag == DW_TAG_structure_type) | |
11146 | { | |
11147 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
11148 | } | |
11149 | else if (die->tag == DW_TAG_union_type) | |
11150 | { | |
11151 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
11152 | } | |
11153 | else | |
11154 | { | |
c906108c SS |
11155 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
11156 | } | |
11157 | ||
0cc2414c TT |
11158 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
11159 | TYPE_DECLARED_CLASS (type) = 1; | |
11160 | ||
e142c38c | 11161 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11162 | if (attr) |
11163 | { | |
11164 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11165 | } | |
11166 | else | |
11167 | { | |
11168 | TYPE_LENGTH (type) = 0; | |
11169 | } | |
11170 | ||
685b1105 JK |
11171 | if (producer_is_icc (cu)) |
11172 | { | |
11173 | /* ICC does not output the required DW_AT_declaration | |
11174 | on incomplete types, but gives them a size of zero. */ | |
11175 | } | |
11176 | else | |
11177 | TYPE_STUB_SUPPORTED (type) = 1; | |
11178 | ||
dc718098 | 11179 | if (die_is_declaration (die, cu)) |
876cecd0 | 11180 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
11181 | else if (attr == NULL && die->child == NULL |
11182 | && producer_is_realview (cu->producer)) | |
11183 | /* RealView does not output the required DW_AT_declaration | |
11184 | on incomplete types. */ | |
11185 | TYPE_STUB (type) = 1; | |
dc718098 | 11186 | |
c906108c SS |
11187 | /* We need to add the type field to the die immediately so we don't |
11188 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 11189 | type within the structure itself. */ |
1c379e20 | 11190 | set_die_type (die, type, cu); |
c906108c | 11191 | |
7e314c57 JK |
11192 | /* set_die_type should be already done. */ |
11193 | set_descriptive_type (type, die, cu); | |
11194 | ||
c767944b DJ |
11195 | return type; |
11196 | } | |
11197 | ||
11198 | /* Finish creating a structure or union type, including filling in | |
11199 | its members and creating a symbol for it. */ | |
11200 | ||
11201 | static void | |
11202 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11203 | { | |
11204 | struct objfile *objfile = cu->objfile; | |
11205 | struct die_info *child_die = die->child; | |
11206 | struct type *type; | |
11207 | ||
11208 | type = get_die_type (die, cu); | |
11209 | if (type == NULL) | |
11210 | type = read_structure_type (die, cu); | |
11211 | ||
e142c38c | 11212 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
11213 | { |
11214 | struct field_info fi; | |
11215 | struct die_info *child_die; | |
34eaf542 | 11216 | VEC (symbolp) *template_args = NULL; |
c767944b | 11217 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
11218 | |
11219 | memset (&fi, 0, sizeof (struct field_info)); | |
11220 | ||
639d11d3 | 11221 | child_die = die->child; |
c906108c SS |
11222 | |
11223 | while (child_die && child_die->tag) | |
11224 | { | |
a9a9bd0f DC |
11225 | if (child_die->tag == DW_TAG_member |
11226 | || child_die->tag == DW_TAG_variable) | |
c906108c | 11227 | { |
a9a9bd0f DC |
11228 | /* NOTE: carlton/2002-11-05: A C++ static data member |
11229 | should be a DW_TAG_member that is a declaration, but | |
11230 | all versions of G++ as of this writing (so through at | |
11231 | least 3.2.1) incorrectly generate DW_TAG_variable | |
11232 | tags for them instead. */ | |
e7c27a73 | 11233 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11234 | } |
8713b1b1 | 11235 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 11236 | { |
0963b4bd | 11237 | /* C++ member function. */ |
e7c27a73 | 11238 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
11239 | } |
11240 | else if (child_die->tag == DW_TAG_inheritance) | |
11241 | { | |
11242 | /* C++ base class field. */ | |
e7c27a73 | 11243 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11244 | } |
98751a41 JK |
11245 | else if (child_die->tag == DW_TAG_typedef) |
11246 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
11247 | else if (child_die->tag == DW_TAG_template_type_param |
11248 | || child_die->tag == DW_TAG_template_value_param) | |
11249 | { | |
11250 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11251 | ||
f1078f66 DJ |
11252 | if (arg != NULL) |
11253 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11254 | } |
11255 | ||
c906108c SS |
11256 | child_die = sibling_die (child_die); |
11257 | } | |
11258 | ||
34eaf542 TT |
11259 | /* Attach template arguments to type. */ |
11260 | if (! VEC_empty (symbolp, template_args)) | |
11261 | { | |
11262 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
11263 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11264 | = VEC_length (symbolp, template_args); | |
11265 | TYPE_TEMPLATE_ARGUMENTS (type) | |
11266 | = obstack_alloc (&objfile->objfile_obstack, | |
11267 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11268 | * sizeof (struct symbol *))); | |
11269 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
11270 | VEC_address (symbolp, template_args), | |
11271 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11272 | * sizeof (struct symbol *))); | |
11273 | VEC_free (symbolp, template_args); | |
11274 | } | |
11275 | ||
c906108c SS |
11276 | /* Attach fields and member functions to the type. */ |
11277 | if (fi.nfields) | |
e7c27a73 | 11278 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
11279 | if (fi.nfnfields) |
11280 | { | |
e7c27a73 | 11281 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 11282 | |
c5aa993b | 11283 | /* Get the type which refers to the base class (possibly this |
c906108c | 11284 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
11285 | class from the DW_AT_containing_type attribute. This use of |
11286 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 11287 | |
e142c38c | 11288 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 11289 | { |
e7c27a73 | 11290 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
11291 | |
11292 | TYPE_VPTR_BASETYPE (type) = t; | |
11293 | if (type == t) | |
11294 | { | |
c906108c SS |
11295 | int i; |
11296 | ||
11297 | /* Our own class provides vtbl ptr. */ | |
11298 | for (i = TYPE_NFIELDS (t) - 1; | |
11299 | i >= TYPE_N_BASECLASSES (t); | |
11300 | --i) | |
11301 | { | |
0d5cff50 | 11302 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 11303 | |
1168df01 | 11304 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
11305 | { |
11306 | TYPE_VPTR_FIELDNO (type) = i; | |
11307 | break; | |
11308 | } | |
11309 | } | |
11310 | ||
11311 | /* Complain if virtual function table field not found. */ | |
11312 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 11313 | complaint (&symfile_complaints, |
3e43a32a MS |
11314 | _("virtual function table pointer " |
11315 | "not found when defining class '%s'"), | |
4d3c2250 KB |
11316 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
11317 | ""); | |
c906108c SS |
11318 | } |
11319 | else | |
11320 | { | |
11321 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
11322 | } | |
11323 | } | |
f6235d4c EZ |
11324 | else if (cu->producer |
11325 | && strncmp (cu->producer, | |
11326 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
11327 | { | |
11328 | /* The IBM XLC compiler does not provide direct indication | |
11329 | of the containing type, but the vtable pointer is | |
11330 | always named __vfp. */ | |
11331 | ||
11332 | int i; | |
11333 | ||
11334 | for (i = TYPE_NFIELDS (type) - 1; | |
11335 | i >= TYPE_N_BASECLASSES (type); | |
11336 | --i) | |
11337 | { | |
11338 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
11339 | { | |
11340 | TYPE_VPTR_FIELDNO (type) = i; | |
11341 | TYPE_VPTR_BASETYPE (type) = type; | |
11342 | break; | |
11343 | } | |
11344 | } | |
11345 | } | |
c906108c | 11346 | } |
98751a41 JK |
11347 | |
11348 | /* Copy fi.typedef_field_list linked list elements content into the | |
11349 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
11350 | if (fi.typedef_field_list) | |
11351 | { | |
11352 | int i = fi.typedef_field_list_count; | |
11353 | ||
a0d7a4ff | 11354 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
11355 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
11356 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
11357 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
11358 | ||
11359 | /* Reverse the list order to keep the debug info elements order. */ | |
11360 | while (--i >= 0) | |
11361 | { | |
11362 | struct typedef_field *dest, *src; | |
6e70227d | 11363 | |
98751a41 JK |
11364 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
11365 | src = &fi.typedef_field_list->field; | |
11366 | fi.typedef_field_list = fi.typedef_field_list->next; | |
11367 | *dest = *src; | |
11368 | } | |
11369 | } | |
c767944b DJ |
11370 | |
11371 | do_cleanups (back_to); | |
eb2a6f42 TT |
11372 | |
11373 | if (HAVE_CPLUS_STRUCT (type)) | |
11374 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 11375 | } |
63d06c5c | 11376 | |
bb5ed363 | 11377 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 11378 | |
90aeadfc DC |
11379 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
11380 | snapshots) has been known to create a die giving a declaration | |
11381 | for a class that has, as a child, a die giving a definition for a | |
11382 | nested class. So we have to process our children even if the | |
11383 | current die is a declaration. Normally, of course, a declaration | |
11384 | won't have any children at all. */ | |
134d01f1 | 11385 | |
90aeadfc DC |
11386 | while (child_die != NULL && child_die->tag) |
11387 | { | |
11388 | if (child_die->tag == DW_TAG_member | |
11389 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
11390 | || child_die->tag == DW_TAG_inheritance |
11391 | || child_die->tag == DW_TAG_template_value_param | |
11392 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 11393 | { |
90aeadfc | 11394 | /* Do nothing. */ |
134d01f1 | 11395 | } |
90aeadfc DC |
11396 | else |
11397 | process_die (child_die, cu); | |
134d01f1 | 11398 | |
90aeadfc | 11399 | child_die = sibling_die (child_die); |
134d01f1 DJ |
11400 | } |
11401 | ||
fa4028e9 JB |
11402 | /* Do not consider external references. According to the DWARF standard, |
11403 | these DIEs are identified by the fact that they have no byte_size | |
11404 | attribute, and a declaration attribute. */ | |
11405 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
11406 | || !die_is_declaration (die, cu)) | |
c767944b | 11407 | new_symbol (die, type, cu); |
134d01f1 DJ |
11408 | } |
11409 | ||
11410 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
11411 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 11412 | |
f792889a | 11413 | static struct type * |
134d01f1 | 11414 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11415 | { |
e7c27a73 | 11416 | struct objfile *objfile = cu->objfile; |
c906108c | 11417 | struct type *type; |
c906108c | 11418 | struct attribute *attr; |
0114d602 | 11419 | const char *name; |
134d01f1 | 11420 | |
348e048f DE |
11421 | /* If the definition of this type lives in .debug_types, read that type. |
11422 | Don't follow DW_AT_specification though, that will take us back up | |
11423 | the chain and we want to go down. */ | |
45e58e77 | 11424 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11425 | if (attr) |
11426 | { | |
11427 | struct dwarf2_cu *type_cu = cu; | |
11428 | struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu); | |
9a619af0 | 11429 | |
348e048f | 11430 | type = read_type_die (type_die, type_cu); |
9dc481d3 DE |
11431 | |
11432 | /* TYPE_CU may not be the same as CU. | |
11433 | Ensure TYPE is recorded in CU's type_hash table. */ | |
348e048f DE |
11434 | return set_die_type (die, type, cu); |
11435 | } | |
11436 | ||
c906108c SS |
11437 | type = alloc_type (objfile); |
11438 | ||
11439 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 11440 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 11441 | if (name != NULL) |
0114d602 | 11442 | TYPE_TAG_NAME (type) = (char *) name; |
c906108c | 11443 | |
e142c38c | 11444 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11445 | if (attr) |
11446 | { | |
11447 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11448 | } | |
11449 | else | |
11450 | { | |
11451 | TYPE_LENGTH (type) = 0; | |
11452 | } | |
11453 | ||
137033e9 JB |
11454 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
11455 | declared as private in the package spec, and then defined only | |
11456 | inside the package body. Such types are known as Taft Amendment | |
11457 | Types. When another package uses such a type, an incomplete DIE | |
11458 | may be generated by the compiler. */ | |
02eb380e | 11459 | if (die_is_declaration (die, cu)) |
876cecd0 | 11460 | TYPE_STUB (type) = 1; |
02eb380e | 11461 | |
f792889a | 11462 | return set_die_type (die, type, cu); |
134d01f1 DJ |
11463 | } |
11464 | ||
11465 | /* Given a pointer to a die which begins an enumeration, process all | |
11466 | the dies that define the members of the enumeration, and create the | |
11467 | symbol for the enumeration type. | |
11468 | ||
11469 | NOTE: We reverse the order of the element list. */ | |
11470 | ||
11471 | static void | |
11472 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11473 | { | |
f792889a | 11474 | struct type *this_type; |
134d01f1 | 11475 | |
f792889a DJ |
11476 | this_type = get_die_type (die, cu); |
11477 | if (this_type == NULL) | |
11478 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 11479 | |
639d11d3 | 11480 | if (die->child != NULL) |
c906108c | 11481 | { |
9dc481d3 DE |
11482 | struct die_info *child_die; |
11483 | struct symbol *sym; | |
11484 | struct field *fields = NULL; | |
11485 | int num_fields = 0; | |
11486 | int unsigned_enum = 1; | |
11487 | char *name; | |
cafec441 TT |
11488 | int flag_enum = 1; |
11489 | ULONGEST mask = 0; | |
9dc481d3 | 11490 | |
639d11d3 | 11491 | child_die = die->child; |
c906108c SS |
11492 | while (child_die && child_die->tag) |
11493 | { | |
11494 | if (child_die->tag != DW_TAG_enumerator) | |
11495 | { | |
e7c27a73 | 11496 | process_die (child_die, cu); |
c906108c SS |
11497 | } |
11498 | else | |
11499 | { | |
39cbfefa DJ |
11500 | name = dwarf2_name (child_die, cu); |
11501 | if (name) | |
c906108c | 11502 | { |
f792889a | 11503 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 11504 | if (SYMBOL_VALUE (sym) < 0) |
cafec441 TT |
11505 | { |
11506 | unsigned_enum = 0; | |
11507 | flag_enum = 0; | |
11508 | } | |
11509 | else if ((mask & SYMBOL_VALUE (sym)) != 0) | |
11510 | flag_enum = 0; | |
11511 | else | |
11512 | mask |= SYMBOL_VALUE (sym); | |
c906108c SS |
11513 | |
11514 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11515 | { | |
11516 | fields = (struct field *) | |
11517 | xrealloc (fields, | |
11518 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11519 | * sizeof (struct field)); |
c906108c SS |
11520 | } |
11521 | ||
3567439c | 11522 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 11523 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 11524 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
11525 | FIELD_BITSIZE (fields[num_fields]) = 0; |
11526 | ||
11527 | num_fields++; | |
11528 | } | |
11529 | } | |
11530 | ||
11531 | child_die = sibling_die (child_die); | |
11532 | } | |
11533 | ||
11534 | if (num_fields) | |
11535 | { | |
f792889a DJ |
11536 | TYPE_NFIELDS (this_type) = num_fields; |
11537 | TYPE_FIELDS (this_type) = (struct field *) | |
11538 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
11539 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 11540 | sizeof (struct field) * num_fields); |
b8c9b27d | 11541 | xfree (fields); |
c906108c SS |
11542 | } |
11543 | if (unsigned_enum) | |
876cecd0 | 11544 | TYPE_UNSIGNED (this_type) = 1; |
cafec441 TT |
11545 | if (flag_enum) |
11546 | TYPE_FLAG_ENUM (this_type) = 1; | |
c906108c | 11547 | } |
134d01f1 | 11548 | |
6c83ed52 TT |
11549 | /* If we are reading an enum from a .debug_types unit, and the enum |
11550 | is a declaration, and the enum is not the signatured type in the | |
11551 | unit, then we do not want to add a symbol for it. Adding a | |
11552 | symbol would in some cases obscure the true definition of the | |
11553 | enum, giving users an incomplete type when the definition is | |
11554 | actually available. Note that we do not want to do this for all | |
11555 | enums which are just declarations, because C++0x allows forward | |
11556 | enum declarations. */ | |
3019eac3 | 11557 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
11558 | && die_is_declaration (die, cu)) |
11559 | { | |
52dc124a | 11560 | struct signatured_type *sig_type; |
6c83ed52 | 11561 | |
52dc124a | 11562 | sig_type |
6c83ed52 | 11563 | = lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile, |
3019eac3 | 11564 | cu->per_cu->info_or_types_section, |
6c83ed52 | 11565 | cu->per_cu->offset); |
3019eac3 DE |
11566 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
11567 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
11568 | return; |
11569 | } | |
11570 | ||
f792889a | 11571 | new_symbol (die, this_type, cu); |
c906108c SS |
11572 | } |
11573 | ||
11574 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
11575 | the DIE's type field. For now, this only handles one dimensional | |
11576 | arrays. */ | |
11577 | ||
f792889a | 11578 | static struct type * |
e7c27a73 | 11579 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11580 | { |
e7c27a73 | 11581 | struct objfile *objfile = cu->objfile; |
c906108c | 11582 | struct die_info *child_die; |
7e314c57 | 11583 | struct type *type; |
c906108c SS |
11584 | struct type *element_type, *range_type, *index_type; |
11585 | struct type **range_types = NULL; | |
11586 | struct attribute *attr; | |
11587 | int ndim = 0; | |
11588 | struct cleanup *back_to; | |
39cbfefa | 11589 | char *name; |
c906108c | 11590 | |
e7c27a73 | 11591 | element_type = die_type (die, cu); |
c906108c | 11592 | |
7e314c57 JK |
11593 | /* The die_type call above may have already set the type for this DIE. */ |
11594 | type = get_die_type (die, cu); | |
11595 | if (type) | |
11596 | return type; | |
11597 | ||
c906108c SS |
11598 | /* Irix 6.2 native cc creates array types without children for |
11599 | arrays with unspecified length. */ | |
639d11d3 | 11600 | if (die->child == NULL) |
c906108c | 11601 | { |
46bf5051 | 11602 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 11603 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
11604 | type = create_array_type (NULL, element_type, range_type); |
11605 | return set_die_type (die, type, cu); | |
c906108c SS |
11606 | } |
11607 | ||
11608 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 11609 | child_die = die->child; |
c906108c SS |
11610 | while (child_die && child_die->tag) |
11611 | { | |
11612 | if (child_die->tag == DW_TAG_subrange_type) | |
11613 | { | |
f792889a | 11614 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 11615 | |
f792889a | 11616 | if (child_type != NULL) |
a02abb62 | 11617 | { |
0963b4bd MS |
11618 | /* The range type was succesfully read. Save it for the |
11619 | array type creation. */ | |
a02abb62 JB |
11620 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
11621 | { | |
11622 | range_types = (struct type **) | |
11623 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
11624 | * sizeof (struct type *)); | |
11625 | if (ndim == 0) | |
11626 | make_cleanup (free_current_contents, &range_types); | |
11627 | } | |
f792889a | 11628 | range_types[ndim++] = child_type; |
a02abb62 | 11629 | } |
c906108c SS |
11630 | } |
11631 | child_die = sibling_die (child_die); | |
11632 | } | |
11633 | ||
11634 | /* Dwarf2 dimensions are output from left to right, create the | |
11635 | necessary array types in backwards order. */ | |
7ca2d3a3 | 11636 | |
c906108c | 11637 | type = element_type; |
7ca2d3a3 DL |
11638 | |
11639 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
11640 | { | |
11641 | int i = 0; | |
9a619af0 | 11642 | |
7ca2d3a3 DL |
11643 | while (i < ndim) |
11644 | type = create_array_type (NULL, type, range_types[i++]); | |
11645 | } | |
11646 | else | |
11647 | { | |
11648 | while (ndim-- > 0) | |
11649 | type = create_array_type (NULL, type, range_types[ndim]); | |
11650 | } | |
c906108c | 11651 | |
f5f8a009 EZ |
11652 | /* Understand Dwarf2 support for vector types (like they occur on |
11653 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
11654 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
11655 | custom vendor extension. The main difference between a regular | |
11656 | array and the vector variant is that vectors are passed by value | |
11657 | to functions. */ | |
e142c38c | 11658 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 11659 | if (attr) |
ea37ba09 | 11660 | make_vector_type (type); |
f5f8a009 | 11661 | |
dbc98a8b KW |
11662 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
11663 | implementation may choose to implement triple vectors using this | |
11664 | attribute. */ | |
11665 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
11666 | if (attr) | |
11667 | { | |
11668 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
11669 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11670 | else | |
3e43a32a MS |
11671 | complaint (&symfile_complaints, |
11672 | _("DW_AT_byte_size for array type smaller " | |
11673 | "than the total size of elements")); | |
dbc98a8b KW |
11674 | } |
11675 | ||
39cbfefa DJ |
11676 | name = dwarf2_name (die, cu); |
11677 | if (name) | |
11678 | TYPE_NAME (type) = name; | |
6e70227d | 11679 | |
0963b4bd | 11680 | /* Install the type in the die. */ |
7e314c57 JK |
11681 | set_die_type (die, type, cu); |
11682 | ||
11683 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
11684 | set_descriptive_type (type, die, cu); |
11685 | ||
c906108c SS |
11686 | do_cleanups (back_to); |
11687 | ||
7e314c57 | 11688 | return type; |
c906108c SS |
11689 | } |
11690 | ||
7ca2d3a3 | 11691 | static enum dwarf_array_dim_ordering |
6e70227d | 11692 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
11693 | { |
11694 | struct attribute *attr; | |
11695 | ||
11696 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
11697 | ||
11698 | if (attr) return DW_SND (attr); | |
11699 | ||
0963b4bd MS |
11700 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
11701 | opposite order to the dwarf2 specification, but data is still | |
11702 | laid out as per normal fortran. | |
7ca2d3a3 | 11703 | |
0963b4bd MS |
11704 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
11705 | version checking. */ | |
7ca2d3a3 | 11706 | |
905e0470 PM |
11707 | if (cu->language == language_fortran |
11708 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
11709 | { |
11710 | return DW_ORD_row_major; | |
11711 | } | |
11712 | ||
6e70227d | 11713 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
11714 | { |
11715 | case array_column_major: | |
11716 | return DW_ORD_col_major; | |
11717 | case array_row_major: | |
11718 | default: | |
11719 | return DW_ORD_row_major; | |
11720 | }; | |
11721 | } | |
11722 | ||
72019c9c | 11723 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 11724 | the DIE's type field. */ |
72019c9c | 11725 | |
f792889a | 11726 | static struct type * |
72019c9c GM |
11727 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
11728 | { | |
7e314c57 JK |
11729 | struct type *domain_type, *set_type; |
11730 | struct attribute *attr; | |
f792889a | 11731 | |
7e314c57 JK |
11732 | domain_type = die_type (die, cu); |
11733 | ||
11734 | /* The die_type call above may have already set the type for this DIE. */ | |
11735 | set_type = get_die_type (die, cu); | |
11736 | if (set_type) | |
11737 | return set_type; | |
11738 | ||
11739 | set_type = create_set_type (NULL, domain_type); | |
11740 | ||
11741 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
11742 | if (attr) |
11743 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 11744 | |
f792889a | 11745 | return set_die_type (die, set_type, cu); |
72019c9c | 11746 | } |
7ca2d3a3 | 11747 | |
0971de02 TT |
11748 | /* A helper for read_common_block that creates a locexpr baton. |
11749 | SYM is the symbol which we are marking as computed. | |
11750 | COMMON_DIE is the DIE for the common block. | |
11751 | COMMON_LOC is the location expression attribute for the common | |
11752 | block itself. | |
11753 | MEMBER_LOC is the location expression attribute for the particular | |
11754 | member of the common block that we are processing. | |
11755 | CU is the CU from which the above come. */ | |
11756 | ||
11757 | static void | |
11758 | mark_common_block_symbol_computed (struct symbol *sym, | |
11759 | struct die_info *common_die, | |
11760 | struct attribute *common_loc, | |
11761 | struct attribute *member_loc, | |
11762 | struct dwarf2_cu *cu) | |
11763 | { | |
11764 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11765 | struct dwarf2_locexpr_baton *baton; | |
11766 | gdb_byte *ptr; | |
11767 | unsigned int cu_off; | |
11768 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
11769 | LONGEST offset = 0; | |
11770 | ||
11771 | gdb_assert (common_loc && member_loc); | |
11772 | gdb_assert (attr_form_is_block (common_loc)); | |
11773 | gdb_assert (attr_form_is_block (member_loc) | |
11774 | || attr_form_is_constant (member_loc)); | |
11775 | ||
11776 | baton = obstack_alloc (&objfile->objfile_obstack, | |
11777 | sizeof (struct dwarf2_locexpr_baton)); | |
11778 | baton->per_cu = cu->per_cu; | |
11779 | gdb_assert (baton->per_cu); | |
11780 | ||
11781 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
11782 | ||
11783 | if (attr_form_is_constant (member_loc)) | |
11784 | { | |
11785 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
11786 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
11787 | } | |
11788 | else | |
11789 | baton->size += DW_BLOCK (member_loc)->size; | |
11790 | ||
11791 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
11792 | baton->data = ptr; | |
11793 | ||
11794 | *ptr++ = DW_OP_call4; | |
11795 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
11796 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
11797 | ptr += 4; | |
11798 | ||
11799 | if (attr_form_is_constant (member_loc)) | |
11800 | { | |
11801 | *ptr++ = DW_OP_addr; | |
11802 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
11803 | ptr += cu->header.addr_size; | |
11804 | } | |
11805 | else | |
11806 | { | |
11807 | /* We have to copy the data here, because DW_OP_call4 will only | |
11808 | use a DW_AT_location attribute. */ | |
11809 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
11810 | ptr += DW_BLOCK (member_loc)->size; | |
11811 | } | |
11812 | ||
11813 | *ptr++ = DW_OP_plus; | |
11814 | gdb_assert (ptr - baton->data == baton->size); | |
11815 | ||
11816 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; | |
11817 | SYMBOL_LOCATION_BATON (sym) = baton; | |
11818 | SYMBOL_CLASS (sym) = LOC_COMPUTED; | |
11819 | } | |
11820 | ||
4357ac6c TT |
11821 | /* Create appropriate locally-scoped variables for all the |
11822 | DW_TAG_common_block entries. Also create a struct common_block | |
11823 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
11824 | is used to sepate the common blocks name namespace from regular | |
11825 | variable names. */ | |
c906108c SS |
11826 | |
11827 | static void | |
e7c27a73 | 11828 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11829 | { |
0971de02 TT |
11830 | struct attribute *attr; |
11831 | ||
11832 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
11833 | if (attr) | |
11834 | { | |
11835 | /* Support the .debug_loc offsets. */ | |
11836 | if (attr_form_is_block (attr)) | |
11837 | { | |
11838 | /* Ok. */ | |
11839 | } | |
11840 | else if (attr_form_is_section_offset (attr)) | |
11841 | { | |
11842 | dwarf2_complex_location_expr_complaint (); | |
11843 | attr = NULL; | |
11844 | } | |
11845 | else | |
11846 | { | |
11847 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
11848 | "common block member"); | |
11849 | attr = NULL; | |
11850 | } | |
11851 | } | |
11852 | ||
639d11d3 | 11853 | if (die->child != NULL) |
c906108c | 11854 | { |
4357ac6c TT |
11855 | struct objfile *objfile = cu->objfile; |
11856 | struct die_info *child_die; | |
11857 | size_t n_entries = 0, size; | |
11858 | struct common_block *common_block; | |
11859 | struct symbol *sym; | |
74ac6d43 | 11860 | |
4357ac6c TT |
11861 | for (child_die = die->child; |
11862 | child_die && child_die->tag; | |
11863 | child_die = sibling_die (child_die)) | |
11864 | ++n_entries; | |
11865 | ||
11866 | size = (sizeof (struct common_block) | |
11867 | + (n_entries - 1) * sizeof (struct symbol *)); | |
11868 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
11869 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
11870 | common_block->n_entries = 0; | |
11871 | ||
11872 | for (child_die = die->child; | |
11873 | child_die && child_die->tag; | |
11874 | child_die = sibling_die (child_die)) | |
11875 | { | |
11876 | /* Create the symbol in the DW_TAG_common_block block in the current | |
11877 | symbol scope. */ | |
e7c27a73 | 11878 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
11879 | if (sym != NULL) |
11880 | { | |
11881 | struct attribute *member_loc; | |
11882 | ||
11883 | common_block->contents[common_block->n_entries++] = sym; | |
11884 | ||
11885 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
11886 | cu); | |
11887 | if (member_loc) | |
11888 | { | |
11889 | /* GDB has handled this for a long time, but it is | |
11890 | not specified by DWARF. It seems to have been | |
11891 | emitted by gfortran at least as recently as: | |
11892 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
11893 | complaint (&symfile_complaints, | |
11894 | _("Variable in common block has " | |
11895 | "DW_AT_data_member_location " | |
11896 | "- DIE at 0x%x [in module %s]"), | |
11897 | child_die->offset.sect_off, cu->objfile->name); | |
11898 | ||
11899 | if (attr_form_is_section_offset (member_loc)) | |
11900 | dwarf2_complex_location_expr_complaint (); | |
11901 | else if (attr_form_is_constant (member_loc) | |
11902 | || attr_form_is_block (member_loc)) | |
11903 | { | |
11904 | if (attr) | |
11905 | mark_common_block_symbol_computed (sym, die, attr, | |
11906 | member_loc, cu); | |
11907 | } | |
11908 | else | |
11909 | dwarf2_complex_location_expr_complaint (); | |
11910 | } | |
11911 | } | |
c906108c | 11912 | } |
4357ac6c TT |
11913 | |
11914 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
11915 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
11916 | } |
11917 | } | |
11918 | ||
0114d602 | 11919 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 11920 | |
0114d602 DJ |
11921 | static struct type * |
11922 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 11923 | { |
e7c27a73 | 11924 | struct objfile *objfile = cu->objfile; |
0114d602 | 11925 | const char *previous_prefix, *name; |
9219021c | 11926 | int is_anonymous; |
0114d602 DJ |
11927 | struct type *type; |
11928 | ||
11929 | /* For extensions, reuse the type of the original namespace. */ | |
11930 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
11931 | { | |
11932 | struct die_info *ext_die; | |
11933 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 11934 | |
0114d602 DJ |
11935 | ext_die = dwarf2_extension (die, &ext_cu); |
11936 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
11937 | |
11938 | /* EXT_CU may not be the same as CU. | |
11939 | Ensure TYPE is recorded in CU's type_hash table. */ | |
0114d602 DJ |
11940 | return set_die_type (die, type, cu); |
11941 | } | |
9219021c | 11942 | |
e142c38c | 11943 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
11944 | |
11945 | /* Now build the name of the current namespace. */ | |
11946 | ||
0114d602 DJ |
11947 | previous_prefix = determine_prefix (die, cu); |
11948 | if (previous_prefix[0] != '\0') | |
11949 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 11950 | previous_prefix, name, 0, cu); |
0114d602 DJ |
11951 | |
11952 | /* Create the type. */ | |
11953 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
11954 | objfile); | |
11955 | TYPE_NAME (type) = (char *) name; | |
11956 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
11957 | ||
60531b24 | 11958 | return set_die_type (die, type, cu); |
0114d602 DJ |
11959 | } |
11960 | ||
11961 | /* Read a C++ namespace. */ | |
11962 | ||
11963 | static void | |
11964 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
11965 | { | |
11966 | struct objfile *objfile = cu->objfile; | |
0114d602 | 11967 | int is_anonymous; |
9219021c | 11968 | |
5c4e30ca DC |
11969 | /* Add a symbol associated to this if we haven't seen the namespace |
11970 | before. Also, add a using directive if it's an anonymous | |
11971 | namespace. */ | |
9219021c | 11972 | |
f2f0e013 | 11973 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
11974 | { |
11975 | struct type *type; | |
11976 | ||
0114d602 | 11977 | type = read_type_die (die, cu); |
e7c27a73 | 11978 | new_symbol (die, type, cu); |
5c4e30ca | 11979 | |
e8e80198 | 11980 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 11981 | if (is_anonymous) |
0114d602 DJ |
11982 | { |
11983 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 11984 | |
c0cc3a76 | 11985 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
32019081 | 11986 | NULL, NULL, &objfile->objfile_obstack); |
0114d602 | 11987 | } |
5c4e30ca | 11988 | } |
9219021c | 11989 | |
639d11d3 | 11990 | if (die->child != NULL) |
d9fa45fe | 11991 | { |
639d11d3 | 11992 | struct die_info *child_die = die->child; |
6e70227d | 11993 | |
d9fa45fe DC |
11994 | while (child_die && child_die->tag) |
11995 | { | |
e7c27a73 | 11996 | process_die (child_die, cu); |
d9fa45fe DC |
11997 | child_die = sibling_die (child_die); |
11998 | } | |
11999 | } | |
38d518c9 EZ |
12000 | } |
12001 | ||
f55ee35c JK |
12002 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
12003 | imported module. Still we need that type as local Fortran "use ... only" | |
12004 | declaration imports depend on the created type in determine_prefix. */ | |
12005 | ||
12006 | static struct type * | |
12007 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
12008 | { | |
12009 | struct objfile *objfile = cu->objfile; | |
12010 | char *module_name; | |
12011 | struct type *type; | |
12012 | ||
12013 | module_name = dwarf2_name (die, cu); | |
12014 | if (!module_name) | |
3e43a32a MS |
12015 | complaint (&symfile_complaints, |
12016 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 12017 | die->offset.sect_off); |
f55ee35c JK |
12018 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
12019 | ||
12020 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
12021 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
12022 | ||
12023 | return set_die_type (die, type, cu); | |
12024 | } | |
12025 | ||
5d7cb8df JK |
12026 | /* Read a Fortran module. */ |
12027 | ||
12028 | static void | |
12029 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
12030 | { | |
12031 | struct die_info *child_die = die->child; | |
12032 | ||
5d7cb8df JK |
12033 | while (child_die && child_die->tag) |
12034 | { | |
12035 | process_die (child_die, cu); | |
12036 | child_die = sibling_die (child_die); | |
12037 | } | |
12038 | } | |
12039 | ||
38d518c9 EZ |
12040 | /* Return the name of the namespace represented by DIE. Set |
12041 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
12042 | namespace. */ | |
12043 | ||
12044 | static const char * | |
e142c38c | 12045 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
12046 | { |
12047 | struct die_info *current_die; | |
12048 | const char *name = NULL; | |
12049 | ||
12050 | /* Loop through the extensions until we find a name. */ | |
12051 | ||
12052 | for (current_die = die; | |
12053 | current_die != NULL; | |
f2f0e013 | 12054 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 12055 | { |
e142c38c | 12056 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
12057 | if (name != NULL) |
12058 | break; | |
12059 | } | |
12060 | ||
12061 | /* Is it an anonymous namespace? */ | |
12062 | ||
12063 | *is_anonymous = (name == NULL); | |
12064 | if (*is_anonymous) | |
2b1dbab0 | 12065 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
12066 | |
12067 | return name; | |
d9fa45fe DC |
12068 | } |
12069 | ||
c906108c SS |
12070 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
12071 | the user defined type vector. */ | |
12072 | ||
f792889a | 12073 | static struct type * |
e7c27a73 | 12074 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12075 | { |
5e2b427d | 12076 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 12077 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 12078 | struct type *type; |
8b2dbe47 KB |
12079 | struct attribute *attr_byte_size; |
12080 | struct attribute *attr_address_class; | |
12081 | int byte_size, addr_class; | |
7e314c57 JK |
12082 | struct type *target_type; |
12083 | ||
12084 | target_type = die_type (die, cu); | |
c906108c | 12085 | |
7e314c57 JK |
12086 | /* The die_type call above may have already set the type for this DIE. */ |
12087 | type = get_die_type (die, cu); | |
12088 | if (type) | |
12089 | return type; | |
12090 | ||
12091 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 12092 | |
e142c38c | 12093 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
12094 | if (attr_byte_size) |
12095 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 12096 | else |
8b2dbe47 KB |
12097 | byte_size = cu_header->addr_size; |
12098 | ||
e142c38c | 12099 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
12100 | if (attr_address_class) |
12101 | addr_class = DW_UNSND (attr_address_class); | |
12102 | else | |
12103 | addr_class = DW_ADDR_none; | |
12104 | ||
12105 | /* If the pointer size or address class is different than the | |
12106 | default, create a type variant marked as such and set the | |
12107 | length accordingly. */ | |
12108 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 12109 | { |
5e2b427d | 12110 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
12111 | { |
12112 | int type_flags; | |
12113 | ||
849957d9 | 12114 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 12115 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
12116 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
12117 | == 0); | |
8b2dbe47 KB |
12118 | type = make_type_with_address_space (type, type_flags); |
12119 | } | |
12120 | else if (TYPE_LENGTH (type) != byte_size) | |
12121 | { | |
3e43a32a MS |
12122 | complaint (&symfile_complaints, |
12123 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 12124 | } |
6e70227d | 12125 | else |
9a619af0 MS |
12126 | { |
12127 | /* Should we also complain about unhandled address classes? */ | |
12128 | } | |
c906108c | 12129 | } |
8b2dbe47 KB |
12130 | |
12131 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 12132 | return set_die_type (die, type, cu); |
c906108c SS |
12133 | } |
12134 | ||
12135 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
12136 | the user defined type vector. */ | |
12137 | ||
f792889a | 12138 | static struct type * |
e7c27a73 | 12139 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
12140 | { |
12141 | struct type *type; | |
12142 | struct type *to_type; | |
12143 | struct type *domain; | |
12144 | ||
e7c27a73 DJ |
12145 | to_type = die_type (die, cu); |
12146 | domain = die_containing_type (die, cu); | |
0d5de010 | 12147 | |
7e314c57 JK |
12148 | /* The calls above may have already set the type for this DIE. */ |
12149 | type = get_die_type (die, cu); | |
12150 | if (type) | |
12151 | return type; | |
12152 | ||
0d5de010 DJ |
12153 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
12154 | type = lookup_methodptr_type (to_type); | |
12155 | else | |
12156 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 12157 | |
f792889a | 12158 | return set_die_type (die, type, cu); |
c906108c SS |
12159 | } |
12160 | ||
12161 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
12162 | the user defined type vector. */ | |
12163 | ||
f792889a | 12164 | static struct type * |
e7c27a73 | 12165 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12166 | { |
e7c27a73 | 12167 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 12168 | struct type *type, *target_type; |
c906108c SS |
12169 | struct attribute *attr; |
12170 | ||
7e314c57 JK |
12171 | target_type = die_type (die, cu); |
12172 | ||
12173 | /* The die_type call above may have already set the type for this DIE. */ | |
12174 | type = get_die_type (die, cu); | |
12175 | if (type) | |
12176 | return type; | |
12177 | ||
12178 | type = lookup_reference_type (target_type); | |
e142c38c | 12179 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12180 | if (attr) |
12181 | { | |
12182 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12183 | } | |
12184 | else | |
12185 | { | |
107d2387 | 12186 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 12187 | } |
f792889a | 12188 | return set_die_type (die, type, cu); |
c906108c SS |
12189 | } |
12190 | ||
f792889a | 12191 | static struct type * |
e7c27a73 | 12192 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12193 | { |
f792889a | 12194 | struct type *base_type, *cv_type; |
c906108c | 12195 | |
e7c27a73 | 12196 | base_type = die_type (die, cu); |
7e314c57 JK |
12197 | |
12198 | /* The die_type call above may have already set the type for this DIE. */ | |
12199 | cv_type = get_die_type (die, cu); | |
12200 | if (cv_type) | |
12201 | return cv_type; | |
12202 | ||
2f608a3a KW |
12203 | /* In case the const qualifier is applied to an array type, the element type |
12204 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
12205 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
12206 | { | |
12207 | struct type *el_type, *inner_array; | |
12208 | ||
12209 | base_type = copy_type (base_type); | |
12210 | inner_array = base_type; | |
12211 | ||
12212 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
12213 | { | |
12214 | TYPE_TARGET_TYPE (inner_array) = | |
12215 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
12216 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
12217 | } | |
12218 | ||
12219 | el_type = TYPE_TARGET_TYPE (inner_array); | |
12220 | TYPE_TARGET_TYPE (inner_array) = | |
12221 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
12222 | ||
12223 | return set_die_type (die, base_type, cu); | |
12224 | } | |
12225 | ||
f792889a DJ |
12226 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
12227 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12228 | } |
12229 | ||
f792889a | 12230 | static struct type * |
e7c27a73 | 12231 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12232 | { |
f792889a | 12233 | struct type *base_type, *cv_type; |
c906108c | 12234 | |
e7c27a73 | 12235 | base_type = die_type (die, cu); |
7e314c57 JK |
12236 | |
12237 | /* The die_type call above may have already set the type for this DIE. */ | |
12238 | cv_type = get_die_type (die, cu); | |
12239 | if (cv_type) | |
12240 | return cv_type; | |
12241 | ||
f792889a DJ |
12242 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
12243 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12244 | } |
12245 | ||
12246 | /* Extract all information from a DW_TAG_string_type DIE and add to | |
12247 | the user defined type vector. It isn't really a user defined type, | |
12248 | but it behaves like one, with other DIE's using an AT_user_def_type | |
12249 | attribute to reference it. */ | |
12250 | ||
f792889a | 12251 | static struct type * |
e7c27a73 | 12252 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12253 | { |
e7c27a73 | 12254 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 12255 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12256 | struct type *type, *range_type, *index_type, *char_type; |
12257 | struct attribute *attr; | |
12258 | unsigned int length; | |
12259 | ||
e142c38c | 12260 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
12261 | if (attr) |
12262 | { | |
12263 | length = DW_UNSND (attr); | |
12264 | } | |
12265 | else | |
12266 | { | |
0963b4bd | 12267 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 12268 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
12269 | if (attr) |
12270 | { | |
12271 | length = DW_UNSND (attr); | |
12272 | } | |
12273 | else | |
12274 | { | |
12275 | length = 1; | |
12276 | } | |
c906108c | 12277 | } |
6ccb9162 | 12278 | |
46bf5051 | 12279 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 12280 | range_type = create_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
12281 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
12282 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 12283 | |
f792889a | 12284 | return set_die_type (die, type, cu); |
c906108c SS |
12285 | } |
12286 | ||
12287 | /* Handle DIES due to C code like: | |
12288 | ||
12289 | struct foo | |
c5aa993b JM |
12290 | { |
12291 | int (*funcp)(int a, long l); | |
12292 | int b; | |
12293 | }; | |
c906108c | 12294 | |
0963b4bd | 12295 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 12296 | |
f792889a | 12297 | static struct type * |
e7c27a73 | 12298 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12299 | { |
bb5ed363 | 12300 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
12301 | struct type *type; /* Type that this function returns. */ |
12302 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
12303 | struct attribute *attr; |
12304 | ||
e7c27a73 | 12305 | type = die_type (die, cu); |
7e314c57 JK |
12306 | |
12307 | /* The die_type call above may have already set the type for this DIE. */ | |
12308 | ftype = get_die_type (die, cu); | |
12309 | if (ftype) | |
12310 | return ftype; | |
12311 | ||
0c8b41f1 | 12312 | ftype = lookup_function_type (type); |
c906108c | 12313 | |
5b8101ae | 12314 | /* All functions in C++, Pascal and Java have prototypes. */ |
e142c38c | 12315 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
c906108c | 12316 | if ((attr && (DW_UNSND (attr) != 0)) |
987504bb | 12317 | || cu->language == language_cplus |
5b8101ae PM |
12318 | || cu->language == language_java |
12319 | || cu->language == language_pascal) | |
876cecd0 | 12320 | TYPE_PROTOTYPED (ftype) = 1; |
a6c727b2 DJ |
12321 | else if (producer_is_realview (cu->producer)) |
12322 | /* RealView does not emit DW_AT_prototyped. We can not | |
12323 | distinguish prototyped and unprototyped functions; default to | |
12324 | prototyped, since that is more common in modern code (and | |
12325 | RealView warns about unprototyped functions). */ | |
12326 | TYPE_PROTOTYPED (ftype) = 1; | |
c906108c | 12327 | |
c055b101 CV |
12328 | /* Store the calling convention in the type if it's available in |
12329 | the subroutine die. Otherwise set the calling convention to | |
12330 | the default value DW_CC_normal. */ | |
12331 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
12332 | if (attr) |
12333 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
12334 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
12335 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
12336 | else | |
12337 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
12338 | |
12339 | /* We need to add the subroutine type to the die immediately so | |
12340 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 12341 | declared as the same subroutine type. */ |
76c10ea2 | 12342 | set_die_type (die, ftype, cu); |
6e70227d | 12343 | |
639d11d3 | 12344 | if (die->child != NULL) |
c906108c | 12345 | { |
bb5ed363 | 12346 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 12347 | struct die_info *child_die; |
8072405b | 12348 | int nparams, iparams; |
c906108c SS |
12349 | |
12350 | /* Count the number of parameters. | |
12351 | FIXME: GDB currently ignores vararg functions, but knows about | |
12352 | vararg member functions. */ | |
8072405b | 12353 | nparams = 0; |
639d11d3 | 12354 | child_die = die->child; |
c906108c SS |
12355 | while (child_die && child_die->tag) |
12356 | { | |
12357 | if (child_die->tag == DW_TAG_formal_parameter) | |
12358 | nparams++; | |
12359 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 12360 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
12361 | child_die = sibling_die (child_die); |
12362 | } | |
12363 | ||
12364 | /* Allocate storage for parameters and fill them in. */ | |
12365 | TYPE_NFIELDS (ftype) = nparams; | |
12366 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 12367 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 12368 | |
8072405b JK |
12369 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
12370 | even if we error out during the parameters reading below. */ | |
12371 | for (iparams = 0; iparams < nparams; iparams++) | |
12372 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
12373 | ||
12374 | iparams = 0; | |
639d11d3 | 12375 | child_die = die->child; |
c906108c SS |
12376 | while (child_die && child_die->tag) |
12377 | { | |
12378 | if (child_die->tag == DW_TAG_formal_parameter) | |
12379 | { | |
3ce3b1ba PA |
12380 | struct type *arg_type; |
12381 | ||
12382 | /* DWARF version 2 has no clean way to discern C++ | |
12383 | static and non-static member functions. G++ helps | |
12384 | GDB by marking the first parameter for non-static | |
12385 | member functions (which is the this pointer) as | |
12386 | artificial. We pass this information to | |
12387 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
12388 | ||
12389 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
12390 | 4.5 does not yet generate. */ | |
e142c38c | 12391 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
12392 | if (attr) |
12393 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
12394 | else | |
418835cc KS |
12395 | { |
12396 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
12397 | ||
12398 | /* GCC/43521: In java, the formal parameter | |
12399 | "this" is sometimes not marked with DW_AT_artificial. */ | |
12400 | if (cu->language == language_java) | |
12401 | { | |
12402 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 12403 | |
418835cc KS |
12404 | if (name && !strcmp (name, "this")) |
12405 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
12406 | } | |
12407 | } | |
3ce3b1ba PA |
12408 | arg_type = die_type (child_die, cu); |
12409 | ||
12410 | /* RealView does not mark THIS as const, which the testsuite | |
12411 | expects. GCC marks THIS as const in method definitions, | |
12412 | but not in the class specifications (GCC PR 43053). */ | |
12413 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
12414 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
12415 | { | |
12416 | int is_this = 0; | |
12417 | struct dwarf2_cu *arg_cu = cu; | |
12418 | const char *name = dwarf2_name (child_die, cu); | |
12419 | ||
12420 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
12421 | if (attr) | |
12422 | { | |
12423 | /* If the compiler emits this, use it. */ | |
12424 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
12425 | is_this = 1; | |
12426 | } | |
12427 | else if (name && strcmp (name, "this") == 0) | |
12428 | /* Function definitions will have the argument names. */ | |
12429 | is_this = 1; | |
12430 | else if (name == NULL && iparams == 0) | |
12431 | /* Declarations may not have the names, so like | |
12432 | elsewhere in GDB, assume an artificial first | |
12433 | argument is "this". */ | |
12434 | is_this = 1; | |
12435 | ||
12436 | if (is_this) | |
12437 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
12438 | arg_type, 0); | |
12439 | } | |
12440 | ||
12441 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
12442 | iparams++; |
12443 | } | |
12444 | child_die = sibling_die (child_die); | |
12445 | } | |
12446 | } | |
12447 | ||
76c10ea2 | 12448 | return ftype; |
c906108c SS |
12449 | } |
12450 | ||
f792889a | 12451 | static struct type * |
e7c27a73 | 12452 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12453 | { |
e7c27a73 | 12454 | struct objfile *objfile = cu->objfile; |
0114d602 | 12455 | const char *name = NULL; |
3c8e0968 | 12456 | struct type *this_type, *target_type; |
c906108c | 12457 | |
94af9270 | 12458 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 12459 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 DJ |
12460 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
12461 | TYPE_NAME (this_type) = (char *) name; | |
f792889a | 12462 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
12463 | target_type = die_type (die, cu); |
12464 | if (target_type != this_type) | |
12465 | TYPE_TARGET_TYPE (this_type) = target_type; | |
12466 | else | |
12467 | { | |
12468 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
12469 | spec and cause infinite loops in GDB. */ | |
12470 | complaint (&symfile_complaints, | |
12471 | _("Self-referential DW_TAG_typedef " | |
12472 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 12473 | die->offset.sect_off, objfile->name); |
3c8e0968 DE |
12474 | TYPE_TARGET_TYPE (this_type) = NULL; |
12475 | } | |
f792889a | 12476 | return this_type; |
c906108c SS |
12477 | } |
12478 | ||
12479 | /* Find a representation of a given base type and install | |
12480 | it in the TYPE field of the die. */ | |
12481 | ||
f792889a | 12482 | static struct type * |
e7c27a73 | 12483 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12484 | { |
e7c27a73 | 12485 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12486 | struct type *type; |
12487 | struct attribute *attr; | |
12488 | int encoding = 0, size = 0; | |
39cbfefa | 12489 | char *name; |
6ccb9162 UW |
12490 | enum type_code code = TYPE_CODE_INT; |
12491 | int type_flags = 0; | |
12492 | struct type *target_type = NULL; | |
c906108c | 12493 | |
e142c38c | 12494 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
12495 | if (attr) |
12496 | { | |
12497 | encoding = DW_UNSND (attr); | |
12498 | } | |
e142c38c | 12499 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12500 | if (attr) |
12501 | { | |
12502 | size = DW_UNSND (attr); | |
12503 | } | |
39cbfefa | 12504 | name = dwarf2_name (die, cu); |
6ccb9162 | 12505 | if (!name) |
c906108c | 12506 | { |
6ccb9162 UW |
12507 | complaint (&symfile_complaints, |
12508 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 12509 | } |
6ccb9162 UW |
12510 | |
12511 | switch (encoding) | |
c906108c | 12512 | { |
6ccb9162 UW |
12513 | case DW_ATE_address: |
12514 | /* Turn DW_ATE_address into a void * pointer. */ | |
12515 | code = TYPE_CODE_PTR; | |
12516 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12517 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
12518 | break; | |
12519 | case DW_ATE_boolean: | |
12520 | code = TYPE_CODE_BOOL; | |
12521 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12522 | break; | |
12523 | case DW_ATE_complex_float: | |
12524 | code = TYPE_CODE_COMPLEX; | |
12525 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
12526 | break; | |
12527 | case DW_ATE_decimal_float: | |
12528 | code = TYPE_CODE_DECFLOAT; | |
12529 | break; | |
12530 | case DW_ATE_float: | |
12531 | code = TYPE_CODE_FLT; | |
12532 | break; | |
12533 | case DW_ATE_signed: | |
12534 | break; | |
12535 | case DW_ATE_unsigned: | |
12536 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
12537 | if (cu->language == language_fortran |
12538 | && name | |
12539 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
12540 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
12541 | break; |
12542 | case DW_ATE_signed_char: | |
6e70227d | 12543 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12544 | || cu->language == language_pascal |
12545 | || cu->language == language_fortran) | |
6ccb9162 UW |
12546 | code = TYPE_CODE_CHAR; |
12547 | break; | |
12548 | case DW_ATE_unsigned_char: | |
868a0084 | 12549 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12550 | || cu->language == language_pascal |
12551 | || cu->language == language_fortran) | |
6ccb9162 UW |
12552 | code = TYPE_CODE_CHAR; |
12553 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12554 | break; | |
75079b2b TT |
12555 | case DW_ATE_UTF: |
12556 | /* We just treat this as an integer and then recognize the | |
12557 | type by name elsewhere. */ | |
12558 | break; | |
12559 | ||
6ccb9162 UW |
12560 | default: |
12561 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
12562 | dwarf_type_encoding_name (encoding)); | |
12563 | break; | |
c906108c | 12564 | } |
6ccb9162 | 12565 | |
0114d602 DJ |
12566 | type = init_type (code, size, type_flags, NULL, objfile); |
12567 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
12568 | TYPE_TARGET_TYPE (type) = target_type; |
12569 | ||
0114d602 | 12570 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 12571 | TYPE_NOSIGN (type) = 1; |
0114d602 | 12572 | |
f792889a | 12573 | return set_die_type (die, type, cu); |
c906108c SS |
12574 | } |
12575 | ||
a02abb62 JB |
12576 | /* Read the given DW_AT_subrange DIE. */ |
12577 | ||
f792889a | 12578 | static struct type * |
a02abb62 JB |
12579 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
12580 | { | |
12581 | struct type *base_type; | |
12582 | struct type *range_type; | |
12583 | struct attribute *attr; | |
4fae6e18 JK |
12584 | LONGEST low, high; |
12585 | int low_default_is_valid; | |
39cbfefa | 12586 | char *name; |
43bbcdc2 | 12587 | LONGEST negative_mask; |
e77813c8 | 12588 | |
a02abb62 | 12589 | base_type = die_type (die, cu); |
953ac07e JK |
12590 | /* Preserve BASE_TYPE's original type, just set its LENGTH. */ |
12591 | check_typedef (base_type); | |
a02abb62 | 12592 | |
7e314c57 JK |
12593 | /* The die_type call above may have already set the type for this DIE. */ |
12594 | range_type = get_die_type (die, cu); | |
12595 | if (range_type) | |
12596 | return range_type; | |
12597 | ||
4fae6e18 JK |
12598 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
12599 | omitting DW_AT_lower_bound. */ | |
12600 | switch (cu->language) | |
6e70227d | 12601 | { |
4fae6e18 JK |
12602 | case language_c: |
12603 | case language_cplus: | |
12604 | low = 0; | |
12605 | low_default_is_valid = 1; | |
12606 | break; | |
12607 | case language_fortran: | |
12608 | low = 1; | |
12609 | low_default_is_valid = 1; | |
12610 | break; | |
12611 | case language_d: | |
12612 | case language_java: | |
12613 | case language_objc: | |
12614 | low = 0; | |
12615 | low_default_is_valid = (cu->header.version >= 4); | |
12616 | break; | |
12617 | case language_ada: | |
12618 | case language_m2: | |
12619 | case language_pascal: | |
a02abb62 | 12620 | low = 1; |
4fae6e18 JK |
12621 | low_default_is_valid = (cu->header.version >= 4); |
12622 | break; | |
12623 | default: | |
12624 | low = 0; | |
12625 | low_default_is_valid = 0; | |
12626 | break; | |
a02abb62 JB |
12627 | } |
12628 | ||
dd5e6932 DJ |
12629 | /* FIXME: For variable sized arrays either of these could be |
12630 | a variable rather than a constant value. We'll allow it, | |
12631 | but we don't know how to handle it. */ | |
e142c38c | 12632 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 12633 | if (attr) |
4fae6e18 JK |
12634 | low = dwarf2_get_attr_constant_value (attr, low); |
12635 | else if (!low_default_is_valid) | |
12636 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
12637 | "- DIE at 0x%x [in module %s]"), | |
12638 | die->offset.sect_off, cu->objfile->name); | |
a02abb62 | 12639 | |
e142c38c | 12640 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 | 12641 | if (attr) |
6e70227d | 12642 | { |
d48323d8 | 12643 | if (attr_form_is_block (attr) || is_ref_attr (attr)) |
a02abb62 JB |
12644 | { |
12645 | /* GCC encodes arrays with unspecified or dynamic length | |
e77813c8 | 12646 | with a DW_FORM_block1 attribute or a reference attribute. |
a02abb62 JB |
12647 | FIXME: GDB does not yet know how to handle dynamic |
12648 | arrays properly, treat them as arrays with unspecified | |
12649 | length for now. | |
12650 | ||
12651 | FIXME: jimb/2003-09-22: GDB does not really know | |
12652 | how to handle arrays of unspecified length | |
12653 | either; we just represent them as zero-length | |
12654 | arrays. Choose an appropriate upper bound given | |
12655 | the lower bound we've computed above. */ | |
12656 | high = low - 1; | |
12657 | } | |
12658 | else | |
12659 | high = dwarf2_get_attr_constant_value (attr, 1); | |
12660 | } | |
e77813c8 PM |
12661 | else |
12662 | { | |
12663 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
12664 | if (attr) | |
12665 | { | |
12666 | int count = dwarf2_get_attr_constant_value (attr, 1); | |
12667 | high = low + count - 1; | |
12668 | } | |
c2ff108b JK |
12669 | else |
12670 | { | |
12671 | /* Unspecified array length. */ | |
12672 | high = low - 1; | |
12673 | } | |
e77813c8 PM |
12674 | } |
12675 | ||
12676 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
12677 | without specifying a base type. | |
12678 | In that case, the base type must be set to the type of | |
12679 | the lower bound, upper bound or count, in that order, if any of these | |
12680 | three attributes references an object that has a type. | |
12681 | If no base type is found, the Dwarf-2 specifications say that | |
12682 | a signed integer type of size equal to the size of an address should | |
12683 | be used. | |
12684 | For the following C code: `extern char gdb_int [];' | |
12685 | GCC produces an empty range DIE. | |
12686 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 12687 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
12688 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
12689 | { | |
12690 | struct objfile *objfile = cu->objfile; | |
12691 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12692 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
12693 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
12694 | ||
12695 | /* Test "int", "long int", and "long long int" objfile types, | |
12696 | and select the first one having a size above or equal to the | |
12697 | architecture address size. */ | |
12698 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
12699 | base_type = int_type; | |
12700 | else | |
12701 | { | |
12702 | int_type = objfile_type (objfile)->builtin_long; | |
12703 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
12704 | base_type = int_type; | |
12705 | else | |
12706 | { | |
12707 | int_type = objfile_type (objfile)->builtin_long_long; | |
12708 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
12709 | base_type = int_type; | |
12710 | } | |
12711 | } | |
12712 | } | |
a02abb62 | 12713 | |
6e70227d | 12714 | negative_mask = |
43bbcdc2 PH |
12715 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
12716 | if (!TYPE_UNSIGNED (base_type) && (low & negative_mask)) | |
12717 | low |= negative_mask; | |
12718 | if (!TYPE_UNSIGNED (base_type) && (high & negative_mask)) | |
12719 | high |= negative_mask; | |
12720 | ||
a02abb62 JB |
12721 | range_type = create_range_type (NULL, base_type, low, high); |
12722 | ||
bbb0eef6 JK |
12723 | /* Mark arrays with dynamic length at least as an array of unspecified |
12724 | length. GDB could check the boundary but before it gets implemented at | |
12725 | least allow accessing the array elements. */ | |
d48323d8 | 12726 | if (attr && attr_form_is_block (attr)) |
bbb0eef6 JK |
12727 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; |
12728 | ||
c2ff108b JK |
12729 | /* Ada expects an empty array on no boundary attributes. */ |
12730 | if (attr == NULL && cu->language != language_ada) | |
12731 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; | |
12732 | ||
39cbfefa DJ |
12733 | name = dwarf2_name (die, cu); |
12734 | if (name) | |
12735 | TYPE_NAME (range_type) = name; | |
6e70227d | 12736 | |
e142c38c | 12737 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
12738 | if (attr) |
12739 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
12740 | ||
7e314c57 JK |
12741 | set_die_type (die, range_type, cu); |
12742 | ||
12743 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
12744 | set_descriptive_type (range_type, die, cu); |
12745 | ||
7e314c57 | 12746 | return range_type; |
a02abb62 | 12747 | } |
6e70227d | 12748 | |
f792889a | 12749 | static struct type * |
81a17f79 JB |
12750 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
12751 | { | |
12752 | struct type *type; | |
81a17f79 | 12753 | |
81a17f79 JB |
12754 | /* For now, we only support the C meaning of an unspecified type: void. */ |
12755 | ||
0114d602 DJ |
12756 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
12757 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 12758 | |
f792889a | 12759 | return set_die_type (die, type, cu); |
81a17f79 | 12760 | } |
a02abb62 | 12761 | |
639d11d3 DC |
12762 | /* Read a single die and all its descendents. Set the die's sibling |
12763 | field to NULL; set other fields in the die correctly, and set all | |
12764 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
12765 | location of the info_ptr after reading all of those dies. PARENT | |
12766 | is the parent of the die in question. */ | |
12767 | ||
12768 | static struct die_info * | |
dee91e82 DE |
12769 | read_die_and_children (const struct die_reader_specs *reader, |
12770 | gdb_byte *info_ptr, | |
12771 | gdb_byte **new_info_ptr, | |
12772 | struct die_info *parent) | |
639d11d3 DC |
12773 | { |
12774 | struct die_info *die; | |
fe1b8b76 | 12775 | gdb_byte *cur_ptr; |
639d11d3 DC |
12776 | int has_children; |
12777 | ||
93311388 | 12778 | cur_ptr = read_full_die (reader, &die, info_ptr, &has_children); |
1d325ec1 DJ |
12779 | if (die == NULL) |
12780 | { | |
12781 | *new_info_ptr = cur_ptr; | |
12782 | return NULL; | |
12783 | } | |
93311388 | 12784 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
12785 | |
12786 | if (has_children) | |
348e048f | 12787 | die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
12788 | else |
12789 | { | |
12790 | die->child = NULL; | |
12791 | *new_info_ptr = cur_ptr; | |
12792 | } | |
12793 | ||
12794 | die->sibling = NULL; | |
12795 | die->parent = parent; | |
12796 | return die; | |
12797 | } | |
12798 | ||
12799 | /* Read a die, all of its descendents, and all of its siblings; set | |
12800 | all of the fields of all of the dies correctly. Arguments are as | |
12801 | in read_die_and_children. */ | |
12802 | ||
12803 | static struct die_info * | |
93311388 DE |
12804 | read_die_and_siblings (const struct die_reader_specs *reader, |
12805 | gdb_byte *info_ptr, | |
fe1b8b76 | 12806 | gdb_byte **new_info_ptr, |
639d11d3 DC |
12807 | struct die_info *parent) |
12808 | { | |
12809 | struct die_info *first_die, *last_sibling; | |
fe1b8b76 | 12810 | gdb_byte *cur_ptr; |
639d11d3 | 12811 | |
c906108c | 12812 | cur_ptr = info_ptr; |
639d11d3 DC |
12813 | first_die = last_sibling = NULL; |
12814 | ||
12815 | while (1) | |
c906108c | 12816 | { |
639d11d3 | 12817 | struct die_info *die |
dee91e82 | 12818 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 12819 | |
1d325ec1 | 12820 | if (die == NULL) |
c906108c | 12821 | { |
639d11d3 DC |
12822 | *new_info_ptr = cur_ptr; |
12823 | return first_die; | |
c906108c | 12824 | } |
1d325ec1 DJ |
12825 | |
12826 | if (!first_die) | |
12827 | first_die = die; | |
c906108c | 12828 | else |
1d325ec1 DJ |
12829 | last_sibling->sibling = die; |
12830 | ||
12831 | last_sibling = die; | |
c906108c | 12832 | } |
c906108c SS |
12833 | } |
12834 | ||
3019eac3 DE |
12835 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
12836 | attributes. | |
12837 | The caller is responsible for filling in the extra attributes | |
12838 | and updating (*DIEP)->num_attrs. | |
12839 | Set DIEP to point to a newly allocated die with its information, | |
12840 | except for its child, sibling, and parent fields. | |
12841 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 DE |
12842 | |
12843 | static gdb_byte * | |
3019eac3 DE |
12844 | read_full_die_1 (const struct die_reader_specs *reader, |
12845 | struct die_info **diep, gdb_byte *info_ptr, | |
12846 | int *has_children, int num_extra_attrs) | |
93311388 | 12847 | { |
b64f50a1 JK |
12848 | unsigned int abbrev_number, bytes_read, i; |
12849 | sect_offset offset; | |
93311388 DE |
12850 | struct abbrev_info *abbrev; |
12851 | struct die_info *die; | |
12852 | struct dwarf2_cu *cu = reader->cu; | |
12853 | bfd *abfd = reader->abfd; | |
12854 | ||
b64f50a1 | 12855 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
12856 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
12857 | info_ptr += bytes_read; | |
12858 | if (!abbrev_number) | |
12859 | { | |
12860 | *diep = NULL; | |
12861 | *has_children = 0; | |
12862 | return info_ptr; | |
12863 | } | |
12864 | ||
433df2d4 | 12865 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 12866 | if (!abbrev) |
348e048f DE |
12867 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
12868 | abbrev_number, | |
12869 | bfd_get_filename (abfd)); | |
12870 | ||
3019eac3 | 12871 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
12872 | die->offset = offset; |
12873 | die->tag = abbrev->tag; | |
12874 | die->abbrev = abbrev_number; | |
12875 | ||
3019eac3 DE |
12876 | /* Make the result usable. |
12877 | The caller needs to update num_attrs after adding the extra | |
12878 | attributes. */ | |
93311388 DE |
12879 | die->num_attrs = abbrev->num_attrs; |
12880 | ||
12881 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
12882 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
12883 | info_ptr); | |
93311388 DE |
12884 | |
12885 | *diep = die; | |
12886 | *has_children = abbrev->has_children; | |
12887 | return info_ptr; | |
12888 | } | |
12889 | ||
3019eac3 DE |
12890 | /* Read a die and all its attributes. |
12891 | Set DIEP to point to a newly allocated die with its information, | |
12892 | except for its child, sibling, and parent fields. | |
12893 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
12894 | ||
12895 | static gdb_byte * | |
12896 | read_full_die (const struct die_reader_specs *reader, | |
12897 | struct die_info **diep, gdb_byte *info_ptr, | |
12898 | int *has_children) | |
12899 | { | |
12900 | return read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
12901 | } | |
433df2d4 DE |
12902 | \f |
12903 | /* Abbreviation tables. | |
3019eac3 | 12904 | |
433df2d4 | 12905 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
12906 | stored in a separate .debug_abbrev section. Before we read any |
12907 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
12908 | in a hash table. */ |
12909 | ||
12910 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
12911 | ||
12912 | static struct abbrev_info * | |
12913 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
12914 | { | |
12915 | struct abbrev_info *abbrev; | |
12916 | ||
12917 | abbrev = (struct abbrev_info *) | |
12918 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
12919 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
12920 | return abbrev; | |
12921 | } | |
12922 | ||
12923 | /* Add an abbreviation to the table. */ | |
c906108c SS |
12924 | |
12925 | static void | |
433df2d4 DE |
12926 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
12927 | unsigned int abbrev_number, | |
12928 | struct abbrev_info *abbrev) | |
12929 | { | |
12930 | unsigned int hash_number; | |
12931 | ||
12932 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
12933 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
12934 | abbrev_table->abbrevs[hash_number] = abbrev; | |
12935 | } | |
dee91e82 | 12936 | |
433df2d4 DE |
12937 | /* Look up an abbrev in the table. |
12938 | Returns NULL if the abbrev is not found. */ | |
12939 | ||
12940 | static struct abbrev_info * | |
12941 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
12942 | unsigned int abbrev_number) | |
c906108c | 12943 | { |
433df2d4 DE |
12944 | unsigned int hash_number; |
12945 | struct abbrev_info *abbrev; | |
12946 | ||
12947 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
12948 | abbrev = abbrev_table->abbrevs[hash_number]; | |
12949 | ||
12950 | while (abbrev) | |
12951 | { | |
12952 | if (abbrev->number == abbrev_number) | |
12953 | return abbrev; | |
12954 | abbrev = abbrev->next; | |
12955 | } | |
12956 | return NULL; | |
12957 | } | |
12958 | ||
12959 | /* Read in an abbrev table. */ | |
12960 | ||
12961 | static struct abbrev_table * | |
12962 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
12963 | sect_offset offset) | |
12964 | { | |
12965 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12966 | bfd *abfd = section->asection->owner; | |
12967 | struct abbrev_table *abbrev_table; | |
fe1b8b76 | 12968 | gdb_byte *abbrev_ptr; |
c906108c SS |
12969 | struct abbrev_info *cur_abbrev; |
12970 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 12971 | unsigned int abbrev_form; |
f3dd6933 DJ |
12972 | struct attr_abbrev *cur_attrs; |
12973 | unsigned int allocated_attrs; | |
c906108c | 12974 | |
433df2d4 | 12975 | abbrev_table = XMALLOC (struct abbrev_table); |
f4dc4d17 | 12976 | abbrev_table->offset = offset; |
433df2d4 DE |
12977 | obstack_init (&abbrev_table->abbrev_obstack); |
12978 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
12979 | (ABBREV_HASH_SIZE | |
12980 | * sizeof (struct abbrev_info *))); | |
12981 | memset (abbrev_table->abbrevs, 0, | |
12982 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 12983 | |
433df2d4 DE |
12984 | dwarf2_read_section (objfile, section); |
12985 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
12986 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
12987 | abbrev_ptr += bytes_read; | |
12988 | ||
f3dd6933 DJ |
12989 | allocated_attrs = ATTR_ALLOC_CHUNK; |
12990 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 12991 | |
0963b4bd | 12992 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
12993 | while (abbrev_number) |
12994 | { | |
433df2d4 | 12995 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
12996 | |
12997 | /* read in abbrev header */ | |
12998 | cur_abbrev->number = abbrev_number; | |
12999 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13000 | abbrev_ptr += bytes_read; | |
13001 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
13002 | abbrev_ptr += 1; | |
13003 | ||
13004 | /* now read in declarations */ | |
13005 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13006 | abbrev_ptr += bytes_read; | |
13007 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13008 | abbrev_ptr += bytes_read; | |
13009 | while (abbrev_name) | |
13010 | { | |
f3dd6933 | 13011 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 13012 | { |
f3dd6933 DJ |
13013 | allocated_attrs += ATTR_ALLOC_CHUNK; |
13014 | cur_attrs | |
13015 | = xrealloc (cur_attrs, (allocated_attrs | |
13016 | * sizeof (struct attr_abbrev))); | |
c906108c | 13017 | } |
ae038cb0 | 13018 | |
f3dd6933 DJ |
13019 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
13020 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
13021 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13022 | abbrev_ptr += bytes_read; | |
13023 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13024 | abbrev_ptr += bytes_read; | |
13025 | } | |
13026 | ||
433df2d4 | 13027 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
13028 | (cur_abbrev->num_attrs |
13029 | * sizeof (struct attr_abbrev))); | |
13030 | memcpy (cur_abbrev->attrs, cur_attrs, | |
13031 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
13032 | ||
433df2d4 | 13033 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
13034 | |
13035 | /* Get next abbreviation. | |
13036 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
13037 | always properly terminated with an abbrev number of 0. |
13038 | Exit loop if we encounter an abbreviation which we have | |
13039 | already read (which means we are about to read the abbreviations | |
13040 | for the next compile unit) or if the end of the abbreviation | |
13041 | table is reached. */ | |
433df2d4 | 13042 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
13043 | break; |
13044 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13045 | abbrev_ptr += bytes_read; | |
433df2d4 | 13046 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
13047 | break; |
13048 | } | |
f3dd6933 DJ |
13049 | |
13050 | xfree (cur_attrs); | |
433df2d4 | 13051 | return abbrev_table; |
c906108c SS |
13052 | } |
13053 | ||
433df2d4 | 13054 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 13055 | |
c906108c | 13056 | static void |
433df2d4 | 13057 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 13058 | { |
433df2d4 DE |
13059 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
13060 | xfree (abbrev_table); | |
c906108c SS |
13061 | } |
13062 | ||
f4dc4d17 DE |
13063 | /* Same as abbrev_table_free but as a cleanup. |
13064 | We pass in a pointer to the pointer to the table so that we can | |
13065 | set the pointer to NULL when we're done. It also simplifies | |
13066 | build_type_unit_groups. */ | |
13067 | ||
13068 | static void | |
13069 | abbrev_table_free_cleanup (void *table_ptr) | |
13070 | { | |
13071 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
13072 | ||
13073 | if (*abbrev_table_ptr != NULL) | |
13074 | abbrev_table_free (*abbrev_table_ptr); | |
13075 | *abbrev_table_ptr = NULL; | |
13076 | } | |
13077 | ||
433df2d4 DE |
13078 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
13079 | ||
13080 | static void | |
13081 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
13082 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 13083 | { |
433df2d4 DE |
13084 | cu->abbrev_table = |
13085 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
13086 | } | |
c906108c | 13087 | |
433df2d4 | 13088 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 13089 | |
433df2d4 DE |
13090 | static void |
13091 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
13092 | { | |
13093 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 13094 | |
433df2d4 DE |
13095 | abbrev_table_free (cu->abbrev_table); |
13096 | /* Set this to NULL so that we SEGV if we try to read it later, | |
13097 | and also because free_comp_unit verifies this is NULL. */ | |
13098 | cu->abbrev_table = NULL; | |
13099 | } | |
13100 | \f | |
72bf9492 DJ |
13101 | /* Returns nonzero if TAG represents a type that we might generate a partial |
13102 | symbol for. */ | |
13103 | ||
13104 | static int | |
13105 | is_type_tag_for_partial (int tag) | |
13106 | { | |
13107 | switch (tag) | |
13108 | { | |
13109 | #if 0 | |
13110 | /* Some types that would be reasonable to generate partial symbols for, | |
13111 | that we don't at present. */ | |
13112 | case DW_TAG_array_type: | |
13113 | case DW_TAG_file_type: | |
13114 | case DW_TAG_ptr_to_member_type: | |
13115 | case DW_TAG_set_type: | |
13116 | case DW_TAG_string_type: | |
13117 | case DW_TAG_subroutine_type: | |
13118 | #endif | |
13119 | case DW_TAG_base_type: | |
13120 | case DW_TAG_class_type: | |
680b30c7 | 13121 | case DW_TAG_interface_type: |
72bf9492 DJ |
13122 | case DW_TAG_enumeration_type: |
13123 | case DW_TAG_structure_type: | |
13124 | case DW_TAG_subrange_type: | |
13125 | case DW_TAG_typedef: | |
13126 | case DW_TAG_union_type: | |
13127 | return 1; | |
13128 | default: | |
13129 | return 0; | |
13130 | } | |
13131 | } | |
13132 | ||
13133 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
13134 | ||
13135 | static struct partial_die_info * | |
dee91e82 DE |
13136 | load_partial_dies (const struct die_reader_specs *reader, |
13137 | gdb_byte *info_ptr, int building_psymtab) | |
72bf9492 | 13138 | { |
dee91e82 | 13139 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13140 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
13141 | struct partial_die_info *part_die; |
13142 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
13143 | struct abbrev_info *abbrev; | |
13144 | unsigned int bytes_read; | |
5afb4e99 | 13145 | unsigned int load_all = 0; |
72bf9492 DJ |
13146 | int nesting_level = 1; |
13147 | ||
13148 | parent_die = NULL; | |
13149 | last_die = NULL; | |
13150 | ||
7adf1e79 DE |
13151 | gdb_assert (cu->per_cu != NULL); |
13152 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
13153 | load_all = 1; |
13154 | ||
72bf9492 DJ |
13155 | cu->partial_dies |
13156 | = htab_create_alloc_ex (cu->header.length / 12, | |
13157 | partial_die_hash, | |
13158 | partial_die_eq, | |
13159 | NULL, | |
13160 | &cu->comp_unit_obstack, | |
13161 | hashtab_obstack_allocate, | |
13162 | dummy_obstack_deallocate); | |
13163 | ||
13164 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13165 | sizeof (struct partial_die_info)); | |
13166 | ||
13167 | while (1) | |
13168 | { | |
13169 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
13170 | ||
13171 | /* A NULL abbrev means the end of a series of children. */ | |
13172 | if (abbrev == NULL) | |
13173 | { | |
13174 | if (--nesting_level == 0) | |
13175 | { | |
13176 | /* PART_DIE was probably the last thing allocated on the | |
13177 | comp_unit_obstack, so we could call obstack_free | |
13178 | here. We don't do that because the waste is small, | |
13179 | and will be cleaned up when we're done with this | |
13180 | compilation unit. This way, we're also more robust | |
13181 | against other users of the comp_unit_obstack. */ | |
13182 | return first_die; | |
13183 | } | |
13184 | info_ptr += bytes_read; | |
13185 | last_die = parent_die; | |
13186 | parent_die = parent_die->die_parent; | |
13187 | continue; | |
13188 | } | |
13189 | ||
98bfdba5 PA |
13190 | /* Check for template arguments. We never save these; if |
13191 | they're seen, we just mark the parent, and go on our way. */ | |
13192 | if (parent_die != NULL | |
13193 | && cu->language == language_cplus | |
13194 | && (abbrev->tag == DW_TAG_template_type_param | |
13195 | || abbrev->tag == DW_TAG_template_value_param)) | |
13196 | { | |
13197 | parent_die->has_template_arguments = 1; | |
13198 | ||
13199 | if (!load_all) | |
13200 | { | |
13201 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 13202 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13203 | continue; |
13204 | } | |
13205 | } | |
13206 | ||
0d99eb77 | 13207 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
13208 | Skip their other children. */ |
13209 | if (!load_all | |
13210 | && cu->language == language_cplus | |
13211 | && parent_die != NULL | |
13212 | && parent_die->tag == DW_TAG_subprogram) | |
13213 | { | |
dee91e82 | 13214 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13215 | continue; |
13216 | } | |
13217 | ||
5afb4e99 DJ |
13218 | /* Check whether this DIE is interesting enough to save. Normally |
13219 | we would not be interested in members here, but there may be | |
13220 | later variables referencing them via DW_AT_specification (for | |
13221 | static members). */ | |
13222 | if (!load_all | |
13223 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 13224 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
13225 | && abbrev->tag != DW_TAG_enumerator |
13226 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 13227 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 13228 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 13229 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 13230 | && abbrev->tag != DW_TAG_module |
95554aad TT |
13231 | && abbrev->tag != DW_TAG_member |
13232 | && abbrev->tag != DW_TAG_imported_unit) | |
72bf9492 DJ |
13233 | { |
13234 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13235 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
13236 | continue; |
13237 | } | |
13238 | ||
dee91e82 DE |
13239 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
13240 | info_ptr); | |
72bf9492 DJ |
13241 | |
13242 | /* This two-pass algorithm for processing partial symbols has a | |
13243 | high cost in cache pressure. Thus, handle some simple cases | |
13244 | here which cover the majority of C partial symbols. DIEs | |
13245 | which neither have specification tags in them, nor could have | |
13246 | specification tags elsewhere pointing at them, can simply be | |
13247 | processed and discarded. | |
13248 | ||
13249 | This segment is also optional; scan_partial_symbols and | |
13250 | add_partial_symbol will handle these DIEs if we chain | |
13251 | them in normally. When compilers which do not emit large | |
13252 | quantities of duplicate debug information are more common, | |
13253 | this code can probably be removed. */ | |
13254 | ||
13255 | /* Any complete simple types at the top level (pretty much all | |
13256 | of them, for a language without namespaces), can be processed | |
13257 | directly. */ | |
13258 | if (parent_die == NULL | |
13259 | && part_die->has_specification == 0 | |
13260 | && part_die->is_declaration == 0 | |
d8228535 | 13261 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
13262 | || part_die->tag == DW_TAG_base_type |
13263 | || part_die->tag == DW_TAG_subrange_type)) | |
13264 | { | |
13265 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 13266 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13267 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
13268 | &objfile->static_psymbols, |
13269 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 13270 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13271 | continue; |
13272 | } | |
13273 | ||
d8228535 JK |
13274 | /* The exception for DW_TAG_typedef with has_children above is |
13275 | a workaround of GCC PR debug/47510. In the case of this complaint | |
13276 | type_name_no_tag_or_error will error on such types later. | |
13277 | ||
13278 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
13279 | it could not find the child DIEs referenced later, this is checked | |
13280 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
13281 | ||
13282 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
13283 | complaint (&symfile_complaints, | |
13284 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
13285 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 13286 | part_die->offset.sect_off, objfile->name); |
d8228535 | 13287 | |
72bf9492 DJ |
13288 | /* If we're at the second level, and we're an enumerator, and |
13289 | our parent has no specification (meaning possibly lives in a | |
13290 | namespace elsewhere), then we can add the partial symbol now | |
13291 | instead of queueing it. */ | |
13292 | if (part_die->tag == DW_TAG_enumerator | |
13293 | && parent_die != NULL | |
13294 | && parent_die->die_parent == NULL | |
13295 | && parent_die->tag == DW_TAG_enumeration_type | |
13296 | && parent_die->has_specification == 0) | |
13297 | { | |
13298 | if (part_die->name == NULL) | |
3e43a32a MS |
13299 | complaint (&symfile_complaints, |
13300 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 13301 | else if (building_psymtab) |
04a679b8 | 13302 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13303 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
13304 | (cu->language == language_cplus |
13305 | || cu->language == language_java) | |
bb5ed363 DE |
13306 | ? &objfile->global_psymbols |
13307 | : &objfile->static_psymbols, | |
13308 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 13309 | |
dee91e82 | 13310 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13311 | continue; |
13312 | } | |
13313 | ||
13314 | /* We'll save this DIE so link it in. */ | |
13315 | part_die->die_parent = parent_die; | |
13316 | part_die->die_sibling = NULL; | |
13317 | part_die->die_child = NULL; | |
13318 | ||
13319 | if (last_die && last_die == parent_die) | |
13320 | last_die->die_child = part_die; | |
13321 | else if (last_die) | |
13322 | last_die->die_sibling = part_die; | |
13323 | ||
13324 | last_die = part_die; | |
13325 | ||
13326 | if (first_die == NULL) | |
13327 | first_die = part_die; | |
13328 | ||
13329 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
13330 | find interesting need to be in the hash table, because we | |
13331 | also have the parent/sibling/child chains; only those that we | |
13332 | might refer to by offset later during partial symbol reading. | |
13333 | ||
13334 | For now this means things that might have be the target of a | |
13335 | DW_AT_specification, DW_AT_abstract_origin, or | |
13336 | DW_AT_extension. DW_AT_extension will refer only to | |
13337 | namespaces; DW_AT_abstract_origin refers to functions (and | |
13338 | many things under the function DIE, but we do not recurse | |
13339 | into function DIEs during partial symbol reading) and | |
13340 | possibly variables as well; DW_AT_specification refers to | |
13341 | declarations. Declarations ought to have the DW_AT_declaration | |
13342 | flag. It happens that GCC forgets to put it in sometimes, but | |
13343 | only for functions, not for types. | |
13344 | ||
13345 | Adding more things than necessary to the hash table is harmless | |
13346 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
13347 | wasted time in find_partial_die, when we reread the compilation |
13348 | unit with load_all_dies set. */ | |
72bf9492 | 13349 | |
5afb4e99 | 13350 | if (load_all |
72929c62 | 13351 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 13352 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
13353 | || abbrev->tag == DW_TAG_variable |
13354 | || abbrev->tag == DW_TAG_namespace | |
13355 | || part_die->is_declaration) | |
13356 | { | |
13357 | void **slot; | |
13358 | ||
13359 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 13360 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
13361 | *slot = part_die; |
13362 | } | |
13363 | ||
13364 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13365 | sizeof (struct partial_die_info)); | |
13366 | ||
13367 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 13368 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
13369 | languages we have to, so that we can get at method physnames |
13370 | to infer fully qualified class names, for DW_AT_specification, | |
13371 | and for C++ template arguments. For C++, we also look one level | |
13372 | inside functions to find template arguments (if the name of the | |
13373 | function does not already contain the template arguments). | |
bc30ff58 JB |
13374 | |
13375 | For Ada, we need to scan the children of subprograms and lexical | |
13376 | blocks as well because Ada allows the definition of nested | |
13377 | entities that could be interesting for the debugger, such as | |
13378 | nested subprograms for instance. */ | |
72bf9492 | 13379 | if (last_die->has_children |
5afb4e99 DJ |
13380 | && (load_all |
13381 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 13382 | || last_die->tag == DW_TAG_module |
72bf9492 | 13383 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
13384 | || (cu->language == language_cplus |
13385 | && last_die->tag == DW_TAG_subprogram | |
13386 | && (last_die->name == NULL | |
13387 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
13388 | || (cu->language != language_c |
13389 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 13390 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 13391 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
13392 | || last_die->tag == DW_TAG_union_type)) |
13393 | || (cu->language == language_ada | |
13394 | && (last_die->tag == DW_TAG_subprogram | |
13395 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
13396 | { |
13397 | nesting_level++; | |
13398 | parent_die = last_die; | |
13399 | continue; | |
13400 | } | |
13401 | ||
13402 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13403 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
13404 | |
13405 | /* Back to the top, do it again. */ | |
13406 | } | |
13407 | } | |
13408 | ||
c906108c SS |
13409 | /* Read a minimal amount of information into the minimal die structure. */ |
13410 | ||
fe1b8b76 | 13411 | static gdb_byte * |
dee91e82 DE |
13412 | read_partial_die (const struct die_reader_specs *reader, |
13413 | struct partial_die_info *part_die, | |
13414 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
13415 | gdb_byte *info_ptr) | |
c906108c | 13416 | { |
dee91e82 | 13417 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13418 | struct objfile *objfile = cu->objfile; |
dee91e82 | 13419 | gdb_byte *buffer = reader->buffer; |
fa238c03 | 13420 | unsigned int i; |
c906108c | 13421 | struct attribute attr; |
c5aa993b | 13422 | int has_low_pc_attr = 0; |
c906108c | 13423 | int has_high_pc_attr = 0; |
91da1414 | 13424 | int high_pc_relative = 0; |
c906108c | 13425 | |
72bf9492 | 13426 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 13427 | |
b64f50a1 | 13428 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
13429 | |
13430 | info_ptr += abbrev_len; | |
13431 | ||
13432 | if (abbrev == NULL) | |
13433 | return info_ptr; | |
13434 | ||
c906108c SS |
13435 | part_die->tag = abbrev->tag; |
13436 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
13437 | |
13438 | for (i = 0; i < abbrev->num_attrs; ++i) | |
13439 | { | |
dee91e82 | 13440 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
13441 | |
13442 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 13443 | partial symbol table. */ |
c906108c SS |
13444 | switch (attr.name) |
13445 | { | |
13446 | case DW_AT_name: | |
71c25dea TT |
13447 | switch (part_die->tag) |
13448 | { | |
13449 | case DW_TAG_compile_unit: | |
95554aad | 13450 | case DW_TAG_partial_unit: |
348e048f | 13451 | case DW_TAG_type_unit: |
71c25dea TT |
13452 | /* Compilation units have a DW_AT_name that is a filename, not |
13453 | a source language identifier. */ | |
13454 | case DW_TAG_enumeration_type: | |
13455 | case DW_TAG_enumerator: | |
13456 | /* These tags always have simple identifiers already; no need | |
13457 | to canonicalize them. */ | |
13458 | part_die->name = DW_STRING (&attr); | |
13459 | break; | |
13460 | default: | |
13461 | part_die->name | |
13462 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 13463 | &objfile->objfile_obstack); |
71c25dea TT |
13464 | break; |
13465 | } | |
c906108c | 13466 | break; |
31ef98ae | 13467 | case DW_AT_linkage_name: |
c906108c | 13468 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
13469 | /* Note that both forms of linkage name might appear. We |
13470 | assume they will be the same, and we only store the last | |
13471 | one we see. */ | |
94af9270 KS |
13472 | if (cu->language == language_ada) |
13473 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 13474 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
13475 | break; |
13476 | case DW_AT_low_pc: | |
13477 | has_low_pc_attr = 1; | |
13478 | part_die->lowpc = DW_ADDR (&attr); | |
13479 | break; | |
13480 | case DW_AT_high_pc: | |
13481 | has_high_pc_attr = 1; | |
3019eac3 DE |
13482 | if (attr.form == DW_FORM_addr |
13483 | || attr.form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
13484 | part_die->highpc = DW_ADDR (&attr); |
13485 | else | |
13486 | { | |
13487 | high_pc_relative = 1; | |
13488 | part_die->highpc = DW_UNSND (&attr); | |
13489 | } | |
c906108c SS |
13490 | break; |
13491 | case DW_AT_location: | |
0963b4bd | 13492 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
13493 | if (attr_form_is_block (&attr)) |
13494 | { | |
95554aad | 13495 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 13496 | } |
3690dd37 | 13497 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 13498 | { |
4d3c2250 | 13499 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13500 | } |
13501 | else | |
13502 | { | |
4d3c2250 KB |
13503 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
13504 | "partial symbol information"); | |
8e19ed76 | 13505 | } |
c906108c | 13506 | break; |
c906108c SS |
13507 | case DW_AT_external: |
13508 | part_die->is_external = DW_UNSND (&attr); | |
13509 | break; | |
13510 | case DW_AT_declaration: | |
13511 | part_die->is_declaration = DW_UNSND (&attr); | |
13512 | break; | |
13513 | case DW_AT_type: | |
13514 | part_die->has_type = 1; | |
13515 | break; | |
13516 | case DW_AT_abstract_origin: | |
13517 | case DW_AT_specification: | |
72bf9492 DJ |
13518 | case DW_AT_extension: |
13519 | part_die->has_specification = 1; | |
c764a876 | 13520 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
13521 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
13522 | || cu->per_cu->is_dwz); | |
c906108c SS |
13523 | break; |
13524 | case DW_AT_sibling: | |
13525 | /* Ignore absolute siblings, they might point outside of | |
13526 | the current compile unit. */ | |
13527 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
13528 | complaint (&symfile_complaints, |
13529 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 13530 | else |
b64f50a1 | 13531 | part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
c906108c | 13532 | break; |
fa4028e9 JB |
13533 | case DW_AT_byte_size: |
13534 | part_die->has_byte_size = 1; | |
13535 | break; | |
68511cec CES |
13536 | case DW_AT_calling_convention: |
13537 | /* DWARF doesn't provide a way to identify a program's source-level | |
13538 | entry point. DW_AT_calling_convention attributes are only meant | |
13539 | to describe functions' calling conventions. | |
13540 | ||
13541 | However, because it's a necessary piece of information in | |
13542 | Fortran, and because DW_CC_program is the only piece of debugging | |
13543 | information whose definition refers to a 'main program' at all, | |
13544 | several compilers have begun marking Fortran main programs with | |
13545 | DW_CC_program --- even when those functions use the standard | |
13546 | calling conventions. | |
13547 | ||
13548 | So until DWARF specifies a way to provide this information and | |
13549 | compilers pick up the new representation, we'll support this | |
13550 | practice. */ | |
13551 | if (DW_UNSND (&attr) == DW_CC_program | |
13552 | && cu->language == language_fortran) | |
01f8c46d JK |
13553 | { |
13554 | set_main_name (part_die->name); | |
13555 | ||
13556 | /* As this DIE has a static linkage the name would be difficult | |
13557 | to look up later. */ | |
13558 | language_of_main = language_fortran; | |
13559 | } | |
68511cec | 13560 | break; |
481860b3 GB |
13561 | case DW_AT_inline: |
13562 | if (DW_UNSND (&attr) == DW_INL_inlined | |
13563 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
13564 | part_die->may_be_inlined = 1; | |
13565 | break; | |
95554aad TT |
13566 | |
13567 | case DW_AT_import: | |
13568 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
13569 | { |
13570 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
13571 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
13572 | || cu->per_cu->is_dwz); | |
13573 | } | |
95554aad TT |
13574 | break; |
13575 | ||
c906108c SS |
13576 | default: |
13577 | break; | |
13578 | } | |
13579 | } | |
13580 | ||
91da1414 MW |
13581 | if (high_pc_relative) |
13582 | part_die->highpc += part_die->lowpc; | |
13583 | ||
9373cf26 JK |
13584 | if (has_low_pc_attr && has_high_pc_attr) |
13585 | { | |
13586 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13587 | eliminate duplicate copies of functions and vtables and such. | |
13588 | The linker will arbitrarily choose one and discard the others. | |
13589 | The AT_*_pc values for such functions refer to local labels in | |
13590 | these sections. If the section from that file was discarded, the | |
13591 | labels are not in the output, so the relocs get a value of 0. | |
13592 | If this is a discarded function, mark the pc bounds as invalid, | |
13593 | so that GDB will ignore it. */ | |
13594 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
13595 | { | |
bb5ed363 | 13596 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13597 | |
13598 | complaint (&symfile_complaints, | |
13599 | _("DW_AT_low_pc %s is zero " | |
13600 | "for DIE at 0x%x [in module %s]"), | |
13601 | paddress (gdbarch, part_die->lowpc), | |
b64f50a1 | 13602 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13603 | } |
13604 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
13605 | else if (part_die->lowpc >= part_die->highpc) | |
13606 | { | |
bb5ed363 | 13607 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13608 | |
13609 | complaint (&symfile_complaints, | |
13610 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
13611 | "for DIE at 0x%x [in module %s]"), | |
13612 | paddress (gdbarch, part_die->lowpc), | |
13613 | paddress (gdbarch, part_die->highpc), | |
b64f50a1 | 13614 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13615 | } |
13616 | else | |
13617 | part_die->has_pc_info = 1; | |
13618 | } | |
85cbf3d3 | 13619 | |
c906108c SS |
13620 | return info_ptr; |
13621 | } | |
13622 | ||
72bf9492 DJ |
13623 | /* Find a cached partial DIE at OFFSET in CU. */ |
13624 | ||
13625 | static struct partial_die_info * | |
b64f50a1 | 13626 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
13627 | { |
13628 | struct partial_die_info *lookup_die = NULL; | |
13629 | struct partial_die_info part_die; | |
13630 | ||
13631 | part_die.offset = offset; | |
b64f50a1 JK |
13632 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
13633 | offset.sect_off); | |
72bf9492 | 13634 | |
72bf9492 DJ |
13635 | return lookup_die; |
13636 | } | |
13637 | ||
348e048f DE |
13638 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
13639 | except in the case of .debug_types DIEs which do not reference | |
13640 | outside their CU (they do however referencing other types via | |
55f1336d | 13641 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
13642 | |
13643 | static struct partial_die_info * | |
36586728 | 13644 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 13645 | { |
bb5ed363 | 13646 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
13647 | struct dwarf2_per_cu_data *per_cu = NULL; |
13648 | struct partial_die_info *pd = NULL; | |
72bf9492 | 13649 | |
36586728 TT |
13650 | if (offset_in_dwz == cu->per_cu->is_dwz |
13651 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
13652 | { |
13653 | pd = find_partial_die_in_comp_unit (offset, cu); | |
13654 | if (pd != NULL) | |
13655 | return pd; | |
0d99eb77 DE |
13656 | /* We missed recording what we needed. |
13657 | Load all dies and try again. */ | |
13658 | per_cu = cu->per_cu; | |
5afb4e99 | 13659 | } |
0d99eb77 DE |
13660 | else |
13661 | { | |
13662 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 13663 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
13664 | { |
13665 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
13666 | " external reference to offset 0x%lx [in module %s].\n"), | |
13667 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
13668 | bfd_get_filename (objfile->obfd)); | |
13669 | } | |
36586728 TT |
13670 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
13671 | objfile); | |
72bf9492 | 13672 | |
0d99eb77 DE |
13673 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
13674 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 13675 | |
0d99eb77 DE |
13676 | per_cu->cu->last_used = 0; |
13677 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
13678 | } | |
5afb4e99 | 13679 | |
dee91e82 DE |
13680 | /* If we didn't find it, and not all dies have been loaded, |
13681 | load them all and try again. */ | |
13682 | ||
5afb4e99 DJ |
13683 | if (pd == NULL && per_cu->load_all_dies == 0) |
13684 | { | |
5afb4e99 | 13685 | per_cu->load_all_dies = 1; |
fd820528 DE |
13686 | |
13687 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
13688 | THIS_CU->cu may already be in use. So we can't just free it and | |
13689 | replace its DIEs with the ones we read in. Instead, we leave those | |
13690 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
13691 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
13692 | set. */ | |
dee91e82 | 13693 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
13694 | |
13695 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
13696 | } | |
13697 | ||
13698 | if (pd == NULL) | |
13699 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
13700 | _("could not find partial DIE 0x%x " |
13701 | "in cache [from module %s]\n"), | |
b64f50a1 | 13702 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 13703 | return pd; |
72bf9492 DJ |
13704 | } |
13705 | ||
abc72ce4 DE |
13706 | /* See if we can figure out if the class lives in a namespace. We do |
13707 | this by looking for a member function; its demangled name will | |
13708 | contain namespace info, if there is any. */ | |
13709 | ||
13710 | static void | |
13711 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
13712 | struct dwarf2_cu *cu) | |
13713 | { | |
13714 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
13715 | what template types look like, because the demangler | |
13716 | frequently doesn't give the same name as the debug info. We | |
13717 | could fix this by only using the demangled name to get the | |
13718 | prefix (but see comment in read_structure_type). */ | |
13719 | ||
13720 | struct partial_die_info *real_pdi; | |
13721 | struct partial_die_info *child_pdi; | |
13722 | ||
13723 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
13724 | we should not do this. We'll prepend the parent's fully qualified | |
13725 | name when we create the partial symbol. */ | |
13726 | ||
13727 | real_pdi = struct_pdi; | |
13728 | while (real_pdi->has_specification) | |
36586728 TT |
13729 | real_pdi = find_partial_die (real_pdi->spec_offset, |
13730 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
13731 | |
13732 | if (real_pdi->die_parent != NULL) | |
13733 | return; | |
13734 | ||
13735 | for (child_pdi = struct_pdi->die_child; | |
13736 | child_pdi != NULL; | |
13737 | child_pdi = child_pdi->die_sibling) | |
13738 | { | |
13739 | if (child_pdi->tag == DW_TAG_subprogram | |
13740 | && child_pdi->linkage_name != NULL) | |
13741 | { | |
13742 | char *actual_class_name | |
13743 | = language_class_name_from_physname (cu->language_defn, | |
13744 | child_pdi->linkage_name); | |
13745 | if (actual_class_name != NULL) | |
13746 | { | |
13747 | struct_pdi->name | |
13748 | = obsavestring (actual_class_name, | |
13749 | strlen (actual_class_name), | |
13750 | &cu->objfile->objfile_obstack); | |
13751 | xfree (actual_class_name); | |
13752 | } | |
13753 | break; | |
13754 | } | |
13755 | } | |
13756 | } | |
13757 | ||
72bf9492 DJ |
13758 | /* Adjust PART_DIE before generating a symbol for it. This function |
13759 | may set the is_external flag or change the DIE's name. */ | |
13760 | ||
13761 | static void | |
13762 | fixup_partial_die (struct partial_die_info *part_die, | |
13763 | struct dwarf2_cu *cu) | |
13764 | { | |
abc72ce4 DE |
13765 | /* Once we've fixed up a die, there's no point in doing so again. |
13766 | This also avoids a memory leak if we were to call | |
13767 | guess_partial_die_structure_name multiple times. */ | |
13768 | if (part_die->fixup_called) | |
13769 | return; | |
13770 | ||
72bf9492 DJ |
13771 | /* If we found a reference attribute and the DIE has no name, try |
13772 | to find a name in the referred to DIE. */ | |
13773 | ||
13774 | if (part_die->name == NULL && part_die->has_specification) | |
13775 | { | |
13776 | struct partial_die_info *spec_die; | |
72bf9492 | 13777 | |
36586728 TT |
13778 | spec_die = find_partial_die (part_die->spec_offset, |
13779 | part_die->spec_is_dwz, cu); | |
72bf9492 | 13780 | |
10b3939b | 13781 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
13782 | |
13783 | if (spec_die->name) | |
13784 | { | |
13785 | part_die->name = spec_die->name; | |
13786 | ||
13787 | /* Copy DW_AT_external attribute if it is set. */ | |
13788 | if (spec_die->is_external) | |
13789 | part_die->is_external = spec_die->is_external; | |
13790 | } | |
13791 | } | |
13792 | ||
13793 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
13794 | |
13795 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 13796 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 13797 | |
abc72ce4 DE |
13798 | /* If there is no parent die to provide a namespace, and there are |
13799 | children, see if we can determine the namespace from their linkage | |
122d1940 | 13800 | name. */ |
abc72ce4 | 13801 | if (cu->language == language_cplus |
8b70b953 | 13802 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
13803 | && part_die->die_parent == NULL |
13804 | && part_die->has_children | |
13805 | && (part_die->tag == DW_TAG_class_type | |
13806 | || part_die->tag == DW_TAG_structure_type | |
13807 | || part_die->tag == DW_TAG_union_type)) | |
13808 | guess_partial_die_structure_name (part_die, cu); | |
13809 | ||
53832f31 TT |
13810 | /* GCC might emit a nameless struct or union that has a linkage |
13811 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
13812 | if (part_die->name == NULL | |
96408a79 SA |
13813 | && (part_die->tag == DW_TAG_class_type |
13814 | || part_die->tag == DW_TAG_interface_type | |
13815 | || part_die->tag == DW_TAG_structure_type | |
13816 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
13817 | && part_die->linkage_name != NULL) |
13818 | { | |
13819 | char *demangled; | |
13820 | ||
13821 | demangled = cplus_demangle (part_die->linkage_name, DMGL_TYPES); | |
13822 | if (demangled) | |
13823 | { | |
96408a79 SA |
13824 | const char *base; |
13825 | ||
13826 | /* Strip any leading namespaces/classes, keep only the base name. | |
13827 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
13828 | base = strrchr (demangled, ':'); | |
13829 | if (base && base > demangled && base[-1] == ':') | |
13830 | base++; | |
13831 | else | |
13832 | base = demangled; | |
13833 | ||
13834 | part_die->name = obsavestring (base, strlen (base), | |
53832f31 TT |
13835 | &cu->objfile->objfile_obstack); |
13836 | xfree (demangled); | |
13837 | } | |
13838 | } | |
13839 | ||
abc72ce4 | 13840 | part_die->fixup_called = 1; |
72bf9492 DJ |
13841 | } |
13842 | ||
a8329558 | 13843 | /* Read an attribute value described by an attribute form. */ |
c906108c | 13844 | |
fe1b8b76 | 13845 | static gdb_byte * |
dee91e82 DE |
13846 | read_attribute_value (const struct die_reader_specs *reader, |
13847 | struct attribute *attr, unsigned form, | |
13848 | gdb_byte *info_ptr) | |
c906108c | 13849 | { |
dee91e82 DE |
13850 | struct dwarf2_cu *cu = reader->cu; |
13851 | bfd *abfd = reader->abfd; | |
e7c27a73 | 13852 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
13853 | unsigned int bytes_read; |
13854 | struct dwarf_block *blk; | |
13855 | ||
a8329558 KW |
13856 | attr->form = form; |
13857 | switch (form) | |
c906108c | 13858 | { |
c906108c | 13859 | case DW_FORM_ref_addr: |
ae411497 | 13860 | if (cu->header.version == 2) |
4568ecf9 | 13861 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 13862 | else |
4568ecf9 DE |
13863 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
13864 | &cu->header, &bytes_read); | |
ae411497 TT |
13865 | info_ptr += bytes_read; |
13866 | break; | |
36586728 TT |
13867 | case DW_FORM_GNU_ref_alt: |
13868 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
13869 | info_ptr += bytes_read; | |
13870 | break; | |
ae411497 | 13871 | case DW_FORM_addr: |
e7c27a73 | 13872 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 13873 | info_ptr += bytes_read; |
c906108c SS |
13874 | break; |
13875 | case DW_FORM_block2: | |
7b5a2f43 | 13876 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13877 | blk->size = read_2_bytes (abfd, info_ptr); |
13878 | info_ptr += 2; | |
13879 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13880 | info_ptr += blk->size; | |
13881 | DW_BLOCK (attr) = blk; | |
13882 | break; | |
13883 | case DW_FORM_block4: | |
7b5a2f43 | 13884 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13885 | blk->size = read_4_bytes (abfd, info_ptr); |
13886 | info_ptr += 4; | |
13887 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13888 | info_ptr += blk->size; | |
13889 | DW_BLOCK (attr) = blk; | |
13890 | break; | |
13891 | case DW_FORM_data2: | |
13892 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
13893 | info_ptr += 2; | |
13894 | break; | |
13895 | case DW_FORM_data4: | |
13896 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
13897 | info_ptr += 4; | |
13898 | break; | |
13899 | case DW_FORM_data8: | |
13900 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
13901 | info_ptr += 8; | |
13902 | break; | |
2dc7f7b3 TT |
13903 | case DW_FORM_sec_offset: |
13904 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
13905 | info_ptr += bytes_read; | |
13906 | break; | |
c906108c | 13907 | case DW_FORM_string: |
9b1c24c8 | 13908 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 13909 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
13910 | info_ptr += bytes_read; |
13911 | break; | |
4bdf3d34 | 13912 | case DW_FORM_strp: |
36586728 TT |
13913 | if (!cu->per_cu->is_dwz) |
13914 | { | |
13915 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
13916 | &bytes_read); | |
13917 | DW_STRING_IS_CANONICAL (attr) = 0; | |
13918 | info_ptr += bytes_read; | |
13919 | break; | |
13920 | } | |
13921 | /* FALLTHROUGH */ | |
13922 | case DW_FORM_GNU_strp_alt: | |
13923 | { | |
13924 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
13925 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
13926 | &bytes_read); | |
13927 | ||
13928 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
13929 | DW_STRING_IS_CANONICAL (attr) = 0; | |
13930 | info_ptr += bytes_read; | |
13931 | } | |
4bdf3d34 | 13932 | break; |
2dc7f7b3 | 13933 | case DW_FORM_exprloc: |
c906108c | 13934 | case DW_FORM_block: |
7b5a2f43 | 13935 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13936 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
13937 | info_ptr += bytes_read; | |
13938 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13939 | info_ptr += blk->size; | |
13940 | DW_BLOCK (attr) = blk; | |
13941 | break; | |
13942 | case DW_FORM_block1: | |
7b5a2f43 | 13943 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13944 | blk->size = read_1_byte (abfd, info_ptr); |
13945 | info_ptr += 1; | |
13946 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13947 | info_ptr += blk->size; | |
13948 | DW_BLOCK (attr) = blk; | |
13949 | break; | |
13950 | case DW_FORM_data1: | |
13951 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
13952 | info_ptr += 1; | |
13953 | break; | |
13954 | case DW_FORM_flag: | |
13955 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
13956 | info_ptr += 1; | |
13957 | break; | |
2dc7f7b3 TT |
13958 | case DW_FORM_flag_present: |
13959 | DW_UNSND (attr) = 1; | |
13960 | break; | |
c906108c SS |
13961 | case DW_FORM_sdata: |
13962 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
13963 | info_ptr += bytes_read; | |
13964 | break; | |
13965 | case DW_FORM_udata: | |
13966 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
13967 | info_ptr += bytes_read; | |
13968 | break; | |
13969 | case DW_FORM_ref1: | |
4568ecf9 DE |
13970 | DW_UNSND (attr) = (cu->header.offset.sect_off |
13971 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
13972 | info_ptr += 1; |
13973 | break; | |
13974 | case DW_FORM_ref2: | |
4568ecf9 DE |
13975 | DW_UNSND (attr) = (cu->header.offset.sect_off |
13976 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
13977 | info_ptr += 2; |
13978 | break; | |
13979 | case DW_FORM_ref4: | |
4568ecf9 DE |
13980 | DW_UNSND (attr) = (cu->header.offset.sect_off |
13981 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
13982 | info_ptr += 4; |
13983 | break; | |
613e1657 | 13984 | case DW_FORM_ref8: |
4568ecf9 DE |
13985 | DW_UNSND (attr) = (cu->header.offset.sect_off |
13986 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
13987 | info_ptr += 8; |
13988 | break; | |
55f1336d | 13989 | case DW_FORM_ref_sig8: |
348e048f DE |
13990 | /* Convert the signature to something we can record in DW_UNSND |
13991 | for later lookup. | |
13992 | NOTE: This is NULL if the type wasn't found. */ | |
13993 | DW_SIGNATURED_TYPE (attr) = | |
e319fa28 | 13994 | lookup_signatured_type (read_8_bytes (abfd, info_ptr)); |
348e048f DE |
13995 | info_ptr += 8; |
13996 | break; | |
c906108c | 13997 | case DW_FORM_ref_udata: |
4568ecf9 DE |
13998 | DW_UNSND (attr) = (cu->header.offset.sect_off |
13999 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
14000 | info_ptr += bytes_read; |
14001 | break; | |
c906108c | 14002 | case DW_FORM_indirect: |
a8329558 KW |
14003 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14004 | info_ptr += bytes_read; | |
dee91e82 | 14005 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 14006 | break; |
3019eac3 DE |
14007 | case DW_FORM_GNU_addr_index: |
14008 | if (reader->dwo_file == NULL) | |
14009 | { | |
14010 | /* For now flag a hard error. | |
14011 | Later we can turn this into a complaint. */ | |
14012 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14013 | dwarf_form_name (form), | |
14014 | bfd_get_filename (abfd)); | |
14015 | } | |
14016 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
14017 | info_ptr += bytes_read; | |
14018 | break; | |
14019 | case DW_FORM_GNU_str_index: | |
14020 | if (reader->dwo_file == NULL) | |
14021 | { | |
14022 | /* For now flag a hard error. | |
14023 | Later we can turn this into a complaint if warranted. */ | |
14024 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14025 | dwarf_form_name (form), | |
14026 | bfd_get_filename (abfd)); | |
14027 | } | |
14028 | { | |
14029 | ULONGEST str_index = | |
14030 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14031 | ||
14032 | DW_STRING (attr) = read_str_index (reader, cu, str_index); | |
14033 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14034 | info_ptr += bytes_read; | |
14035 | } | |
14036 | break; | |
c906108c | 14037 | default: |
8a3fe4f8 | 14038 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
14039 | dwarf_form_name (form), |
14040 | bfd_get_filename (abfd)); | |
c906108c | 14041 | } |
28e94949 | 14042 | |
36586728 TT |
14043 | /* Super hack. */ |
14044 | if (cu->per_cu->is_dwz && is_ref_attr (attr)) | |
14045 | attr->form = DW_FORM_GNU_ref_alt; | |
14046 | ||
28e94949 JB |
14047 | /* We have seen instances where the compiler tried to emit a byte |
14048 | size attribute of -1 which ended up being encoded as an unsigned | |
14049 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
14050 | an object of this size seems pretty unlikely so we can relatively | |
14051 | safely treat these cases as if the size attribute was invalid and | |
14052 | treat them as zero by default. */ | |
14053 | if (attr->name == DW_AT_byte_size | |
14054 | && form == DW_FORM_data4 | |
14055 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
14056 | { |
14057 | complaint | |
14058 | (&symfile_complaints, | |
43bbcdc2 PH |
14059 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
14060 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
14061 | DW_UNSND (attr) = 0; |
14062 | } | |
28e94949 | 14063 | |
c906108c SS |
14064 | return info_ptr; |
14065 | } | |
14066 | ||
a8329558 KW |
14067 | /* Read an attribute described by an abbreviated attribute. */ |
14068 | ||
fe1b8b76 | 14069 | static gdb_byte * |
dee91e82 DE |
14070 | read_attribute (const struct die_reader_specs *reader, |
14071 | struct attribute *attr, struct attr_abbrev *abbrev, | |
14072 | gdb_byte *info_ptr) | |
a8329558 KW |
14073 | { |
14074 | attr->name = abbrev->name; | |
dee91e82 | 14075 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
14076 | } |
14077 | ||
0963b4bd | 14078 | /* Read dwarf information from a buffer. */ |
c906108c SS |
14079 | |
14080 | static unsigned int | |
a1855c1d | 14081 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14082 | { |
fe1b8b76 | 14083 | return bfd_get_8 (abfd, buf); |
c906108c SS |
14084 | } |
14085 | ||
14086 | static int | |
a1855c1d | 14087 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14088 | { |
fe1b8b76 | 14089 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
14090 | } |
14091 | ||
14092 | static unsigned int | |
a1855c1d | 14093 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14094 | { |
fe1b8b76 | 14095 | return bfd_get_16 (abfd, buf); |
c906108c SS |
14096 | } |
14097 | ||
21ae7a4d | 14098 | static int |
a1855c1d | 14099 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14100 | { |
14101 | return bfd_get_signed_16 (abfd, buf); | |
14102 | } | |
14103 | ||
c906108c | 14104 | static unsigned int |
a1855c1d | 14105 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14106 | { |
fe1b8b76 | 14107 | return bfd_get_32 (abfd, buf); |
c906108c SS |
14108 | } |
14109 | ||
21ae7a4d | 14110 | static int |
a1855c1d | 14111 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14112 | { |
14113 | return bfd_get_signed_32 (abfd, buf); | |
14114 | } | |
14115 | ||
93311388 | 14116 | static ULONGEST |
a1855c1d | 14117 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14118 | { |
fe1b8b76 | 14119 | return bfd_get_64 (abfd, buf); |
c906108c SS |
14120 | } |
14121 | ||
14122 | static CORE_ADDR | |
fe1b8b76 | 14123 | read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 14124 | unsigned int *bytes_read) |
c906108c | 14125 | { |
e7c27a73 | 14126 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14127 | CORE_ADDR retval = 0; |
14128 | ||
107d2387 | 14129 | if (cu_header->signed_addr_p) |
c906108c | 14130 | { |
107d2387 AC |
14131 | switch (cu_header->addr_size) |
14132 | { | |
14133 | case 2: | |
fe1b8b76 | 14134 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
14135 | break; |
14136 | case 4: | |
fe1b8b76 | 14137 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
14138 | break; |
14139 | case 8: | |
fe1b8b76 | 14140 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
14141 | break; |
14142 | default: | |
8e65ff28 | 14143 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 14144 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 14145 | bfd_get_filename (abfd)); |
107d2387 AC |
14146 | } |
14147 | } | |
14148 | else | |
14149 | { | |
14150 | switch (cu_header->addr_size) | |
14151 | { | |
14152 | case 2: | |
fe1b8b76 | 14153 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
14154 | break; |
14155 | case 4: | |
fe1b8b76 | 14156 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
14157 | break; |
14158 | case 8: | |
fe1b8b76 | 14159 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
14160 | break; |
14161 | default: | |
8e65ff28 | 14162 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
14163 | _("read_address: bad switch, " |
14164 | "unsigned [in module %s]"), | |
659b0389 | 14165 | bfd_get_filename (abfd)); |
107d2387 | 14166 | } |
c906108c | 14167 | } |
64367e0a | 14168 | |
107d2387 AC |
14169 | *bytes_read = cu_header->addr_size; |
14170 | return retval; | |
c906108c SS |
14171 | } |
14172 | ||
f7ef9339 | 14173 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
14174 | specification allows the initial length to take up either 4 bytes |
14175 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
14176 | bytes describe the length and all offsets will be 8 bytes in length | |
14177 | instead of 4. | |
14178 | ||
f7ef9339 KB |
14179 | An older, non-standard 64-bit format is also handled by this |
14180 | function. The older format in question stores the initial length | |
14181 | as an 8-byte quantity without an escape value. Lengths greater | |
14182 | than 2^32 aren't very common which means that the initial 4 bytes | |
14183 | is almost always zero. Since a length value of zero doesn't make | |
14184 | sense for the 32-bit format, this initial zero can be considered to | |
14185 | be an escape value which indicates the presence of the older 64-bit | |
14186 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
14187 | greater than 4GB. If it becomes necessary to handle lengths |
14188 | somewhat larger than 4GB, we could allow other small values (such | |
14189 | as the non-sensical values of 1, 2, and 3) to also be used as | |
14190 | escape values indicating the presence of the old format. | |
f7ef9339 | 14191 | |
917c78fc MK |
14192 | The value returned via bytes_read should be used to increment the |
14193 | relevant pointer after calling read_initial_length(). | |
c764a876 | 14194 | |
613e1657 KB |
14195 | [ Note: read_initial_length() and read_offset() are based on the |
14196 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 14197 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
14198 | from: |
14199 | ||
f7ef9339 | 14200 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 14201 | |
613e1657 KB |
14202 | This document is only a draft and is subject to change. (So beware.) |
14203 | ||
f7ef9339 | 14204 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
14205 | determined empirically by examining 64-bit ELF files produced by |
14206 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
14207 | |
14208 | - Kevin, July 16, 2002 | |
613e1657 KB |
14209 | ] */ |
14210 | ||
14211 | static LONGEST | |
c764a876 | 14212 | read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 14213 | { |
fe1b8b76 | 14214 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 14215 | |
dd373385 | 14216 | if (length == 0xffffffff) |
613e1657 | 14217 | { |
fe1b8b76 | 14218 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 14219 | *bytes_read = 12; |
613e1657 | 14220 | } |
dd373385 | 14221 | else if (length == 0) |
f7ef9339 | 14222 | { |
dd373385 | 14223 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 14224 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 14225 | *bytes_read = 8; |
f7ef9339 | 14226 | } |
613e1657 KB |
14227 | else |
14228 | { | |
14229 | *bytes_read = 4; | |
613e1657 KB |
14230 | } |
14231 | ||
c764a876 DE |
14232 | return length; |
14233 | } | |
dd373385 | 14234 | |
c764a876 DE |
14235 | /* Cover function for read_initial_length. |
14236 | Returns the length of the object at BUF, and stores the size of the | |
14237 | initial length in *BYTES_READ and stores the size that offsets will be in | |
14238 | *OFFSET_SIZE. | |
14239 | If the initial length size is not equivalent to that specified in | |
14240 | CU_HEADER then issue a complaint. | |
14241 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 14242 | |
c764a876 DE |
14243 | static LONGEST |
14244 | read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf, | |
14245 | const struct comp_unit_head *cu_header, | |
14246 | unsigned int *bytes_read, | |
14247 | unsigned int *offset_size) | |
14248 | { | |
14249 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
14250 | ||
14251 | gdb_assert (cu_header->initial_length_size == 4 | |
14252 | || cu_header->initial_length_size == 8 | |
14253 | || cu_header->initial_length_size == 12); | |
14254 | ||
14255 | if (cu_header->initial_length_size != *bytes_read) | |
14256 | complaint (&symfile_complaints, | |
14257 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 14258 | |
c764a876 | 14259 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 14260 | return length; |
613e1657 KB |
14261 | } |
14262 | ||
14263 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 14264 | given by cu_header->offset_size. */ |
613e1657 KB |
14265 | |
14266 | static LONGEST | |
fe1b8b76 | 14267 | read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header, |
891d2f0b | 14268 | unsigned int *bytes_read) |
c764a876 DE |
14269 | { |
14270 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 14271 | |
c764a876 DE |
14272 | *bytes_read = cu_header->offset_size; |
14273 | return offset; | |
14274 | } | |
14275 | ||
14276 | /* Read an offset from the data stream. */ | |
14277 | ||
14278 | static LONGEST | |
14279 | read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size) | |
613e1657 KB |
14280 | { |
14281 | LONGEST retval = 0; | |
14282 | ||
c764a876 | 14283 | switch (offset_size) |
613e1657 KB |
14284 | { |
14285 | case 4: | |
fe1b8b76 | 14286 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
14287 | break; |
14288 | case 8: | |
fe1b8b76 | 14289 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
14290 | break; |
14291 | default: | |
8e65ff28 | 14292 | internal_error (__FILE__, __LINE__, |
c764a876 | 14293 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 14294 | bfd_get_filename (abfd)); |
613e1657 KB |
14295 | } |
14296 | ||
917c78fc | 14297 | return retval; |
613e1657 KB |
14298 | } |
14299 | ||
fe1b8b76 JB |
14300 | static gdb_byte * |
14301 | read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size) | |
c906108c SS |
14302 | { |
14303 | /* If the size of a host char is 8 bits, we can return a pointer | |
14304 | to the buffer, otherwise we have to copy the data to a buffer | |
14305 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14306 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 14307 | return buf; |
c906108c SS |
14308 | } |
14309 | ||
14310 | static char * | |
9b1c24c8 | 14311 | read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c SS |
14312 | { |
14313 | /* If the size of a host char is 8 bits, we can return a pointer | |
14314 | to the string, otherwise we have to copy the string to a buffer | |
14315 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14316 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
14317 | if (*buf == '\0') |
14318 | { | |
14319 | *bytes_read_ptr = 1; | |
14320 | return NULL; | |
14321 | } | |
fe1b8b76 JB |
14322 | *bytes_read_ptr = strlen ((char *) buf) + 1; |
14323 | return (char *) buf; | |
4bdf3d34 JJ |
14324 | } |
14325 | ||
14326 | static char * | |
cf2c3c16 | 14327 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 14328 | { |
be391dca | 14329 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 14330 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
14331 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
14332 | bfd_get_filename (abfd)); | |
dce234bc | 14333 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
14334 | error (_("DW_FORM_strp pointing outside of " |
14335 | ".debug_str section [in module %s]"), | |
14336 | bfd_get_filename (abfd)); | |
4bdf3d34 | 14337 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 14338 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 14339 | return NULL; |
dce234bc | 14340 | return (char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
14341 | } |
14342 | ||
36586728 TT |
14343 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
14344 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
14345 | the string consists of a single NUL byte, return NULL; otherwise | |
14346 | return a pointer to the string. */ | |
14347 | ||
14348 | static char * | |
14349 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) | |
14350 | { | |
14351 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
14352 | ||
14353 | if (dwz->str.buffer == NULL) | |
14354 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
14355 | "section [in module %s]"), | |
14356 | bfd_get_filename (dwz->dwz_bfd)); | |
14357 | if (str_offset >= dwz->str.size) | |
14358 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
14359 | ".debug_str section [in module %s]"), | |
14360 | bfd_get_filename (dwz->dwz_bfd)); | |
14361 | gdb_assert (HOST_CHAR_BIT == 8); | |
14362 | if (dwz->str.buffer[str_offset] == '\0') | |
14363 | return NULL; | |
14364 | return (char *) (dwz->str.buffer + str_offset); | |
14365 | } | |
14366 | ||
cf2c3c16 TT |
14367 | static char * |
14368 | read_indirect_string (bfd *abfd, gdb_byte *buf, | |
14369 | const struct comp_unit_head *cu_header, | |
14370 | unsigned int *bytes_read_ptr) | |
14371 | { | |
14372 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
14373 | ||
14374 | return read_indirect_string_at_offset (abfd, str_offset); | |
14375 | } | |
14376 | ||
12df843f | 14377 | static ULONGEST |
fe1b8b76 | 14378 | read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 14379 | { |
12df843f | 14380 | ULONGEST result; |
ce5d95e1 | 14381 | unsigned int num_read; |
c906108c SS |
14382 | int i, shift; |
14383 | unsigned char byte; | |
14384 | ||
14385 | result = 0; | |
14386 | shift = 0; | |
14387 | num_read = 0; | |
14388 | i = 0; | |
14389 | while (1) | |
14390 | { | |
fe1b8b76 | 14391 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14392 | buf++; |
14393 | num_read++; | |
12df843f | 14394 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
14395 | if ((byte & 128) == 0) |
14396 | { | |
14397 | break; | |
14398 | } | |
14399 | shift += 7; | |
14400 | } | |
14401 | *bytes_read_ptr = num_read; | |
14402 | return result; | |
14403 | } | |
14404 | ||
12df843f | 14405 | static LONGEST |
fe1b8b76 | 14406 | read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 14407 | { |
12df843f | 14408 | LONGEST result; |
77e0b926 | 14409 | int i, shift, num_read; |
c906108c SS |
14410 | unsigned char byte; |
14411 | ||
14412 | result = 0; | |
14413 | shift = 0; | |
c906108c SS |
14414 | num_read = 0; |
14415 | i = 0; | |
14416 | while (1) | |
14417 | { | |
fe1b8b76 | 14418 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14419 | buf++; |
14420 | num_read++; | |
12df843f | 14421 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
14422 | shift += 7; |
14423 | if ((byte & 128) == 0) | |
14424 | { | |
14425 | break; | |
14426 | } | |
14427 | } | |
77e0b926 | 14428 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 14429 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
14430 | *bytes_read_ptr = num_read; |
14431 | return result; | |
14432 | } | |
14433 | ||
3019eac3 DE |
14434 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
14435 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
14436 | ADDR_SIZE is the size of addresses from the CU header. */ | |
14437 | ||
14438 | static CORE_ADDR | |
14439 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
14440 | { | |
14441 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14442 | bfd *abfd = objfile->obfd; | |
14443 | const gdb_byte *info_ptr; | |
14444 | ||
14445 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
14446 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
14447 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
14448 | objfile->name); | |
14449 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) | |
14450 | error (_("DW_FORM_addr_index pointing outside of " | |
14451 | ".debug_addr section [in module %s]"), | |
14452 | objfile->name); | |
14453 | info_ptr = (dwarf2_per_objfile->addr.buffer | |
14454 | + addr_base + addr_index * addr_size); | |
14455 | if (addr_size == 4) | |
14456 | return bfd_get_32 (abfd, info_ptr); | |
14457 | else | |
14458 | return bfd_get_64 (abfd, info_ptr); | |
14459 | } | |
14460 | ||
14461 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
14462 | ||
14463 | static CORE_ADDR | |
14464 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
14465 | { | |
14466 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
14467 | } | |
14468 | ||
14469 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
14470 | ||
14471 | static CORE_ADDR | |
14472 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, gdb_byte *info_ptr, | |
14473 | unsigned int *bytes_read) | |
14474 | { | |
14475 | bfd *abfd = cu->objfile->obfd; | |
14476 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
14477 | ||
14478 | return read_addr_index (cu, addr_index); | |
14479 | } | |
14480 | ||
14481 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
14482 | back to dwarf2_read_addr_index. */ | |
14483 | ||
14484 | struct dwarf2_read_addr_index_data | |
14485 | { | |
14486 | ULONGEST addr_base; | |
14487 | int addr_size; | |
14488 | }; | |
14489 | ||
14490 | /* die_reader_func for dwarf2_read_addr_index. */ | |
14491 | ||
14492 | static void | |
14493 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
14494 | gdb_byte *info_ptr, | |
14495 | struct die_info *comp_unit_die, | |
14496 | int has_children, | |
14497 | void *data) | |
14498 | { | |
14499 | struct dwarf2_cu *cu = reader->cu; | |
14500 | struct dwarf2_read_addr_index_data *aidata = | |
14501 | (struct dwarf2_read_addr_index_data *) data; | |
14502 | ||
14503 | aidata->addr_base = cu->addr_base; | |
14504 | aidata->addr_size = cu->header.addr_size; | |
14505 | } | |
14506 | ||
14507 | /* Given an index in .debug_addr, fetch the value. | |
14508 | NOTE: This can be called during dwarf expression evaluation, | |
14509 | long after the debug information has been read, and thus per_cu->cu | |
14510 | may no longer exist. */ | |
14511 | ||
14512 | CORE_ADDR | |
14513 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
14514 | unsigned int addr_index) | |
14515 | { | |
14516 | struct objfile *objfile = per_cu->objfile; | |
14517 | struct dwarf2_cu *cu = per_cu->cu; | |
14518 | ULONGEST addr_base; | |
14519 | int addr_size; | |
14520 | ||
14521 | /* This is intended to be called from outside this file. */ | |
14522 | dw2_setup (objfile); | |
14523 | ||
14524 | /* We need addr_base and addr_size. | |
14525 | If we don't have PER_CU->cu, we have to get it. | |
14526 | Nasty, but the alternative is storing the needed info in PER_CU, | |
14527 | which at this point doesn't seem justified: it's not clear how frequently | |
14528 | it would get used and it would increase the size of every PER_CU. | |
14529 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
14530 | so we're not in uncharted territory here. | |
14531 | Alas we need to be a bit more complicated as addr_base is contained | |
14532 | in the DIE. | |
14533 | ||
14534 | We don't need to read the entire CU(/TU). | |
14535 | We just need the header and top level die. | |
a1b64ce1 | 14536 | |
3019eac3 | 14537 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 14538 | For now we skip this optimization. */ |
3019eac3 DE |
14539 | |
14540 | if (cu != NULL) | |
14541 | { | |
14542 | addr_base = cu->addr_base; | |
14543 | addr_size = cu->header.addr_size; | |
14544 | } | |
14545 | else | |
14546 | { | |
14547 | struct dwarf2_read_addr_index_data aidata; | |
14548 | ||
a1b64ce1 DE |
14549 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
14550 | we need addr_base. */ | |
14551 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
14552 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
14553 | addr_base = aidata.addr_base; |
14554 | addr_size = aidata.addr_size; | |
14555 | } | |
14556 | ||
14557 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
14558 | } | |
14559 | ||
14560 | /* Given a DW_AT_str_index, fetch the string. */ | |
14561 | ||
14562 | static char * | |
14563 | read_str_index (const struct die_reader_specs *reader, | |
14564 | struct dwarf2_cu *cu, ULONGEST str_index) | |
14565 | { | |
14566 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14567 | const char *dwo_name = objfile->name; | |
14568 | bfd *abfd = objfile->obfd; | |
14569 | struct dwo_sections *sections = &reader->dwo_file->sections; | |
14570 | gdb_byte *info_ptr; | |
14571 | ULONGEST str_offset; | |
14572 | ||
14573 | dwarf2_read_section (objfile, §ions->str); | |
14574 | dwarf2_read_section (objfile, §ions->str_offsets); | |
14575 | if (sections->str.buffer == NULL) | |
14576 | error (_("DW_FORM_str_index used without .debug_str.dwo section" | |
14577 | " in CU at offset 0x%lx [in module %s]"), | |
14578 | (long) cu->header.offset.sect_off, dwo_name); | |
14579 | if (sections->str_offsets.buffer == NULL) | |
14580 | error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section" | |
14581 | " in CU at offset 0x%lx [in module %s]"), | |
14582 | (long) cu->header.offset.sect_off, dwo_name); | |
14583 | if (str_index * cu->header.offset_size >= sections->str_offsets.size) | |
14584 | error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo" | |
14585 | " section in CU at offset 0x%lx [in module %s]"), | |
14586 | (long) cu->header.offset.sect_off, dwo_name); | |
14587 | info_ptr = (sections->str_offsets.buffer | |
14588 | + str_index * cu->header.offset_size); | |
14589 | if (cu->header.offset_size == 4) | |
14590 | str_offset = bfd_get_32 (abfd, info_ptr); | |
14591 | else | |
14592 | str_offset = bfd_get_64 (abfd, info_ptr); | |
14593 | if (str_offset >= sections->str.size) | |
14594 | error (_("Offset from DW_FORM_str_index pointing outside of" | |
14595 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), | |
14596 | (long) cu->header.offset.sect_off, dwo_name); | |
14597 | return (char *) (sections->str.buffer + str_offset); | |
14598 | } | |
14599 | ||
3019eac3 DE |
14600 | /* Return the length of an LEB128 number in BUF. */ |
14601 | ||
14602 | static int | |
14603 | leb128_size (const gdb_byte *buf) | |
14604 | { | |
14605 | const gdb_byte *begin = buf; | |
14606 | gdb_byte byte; | |
14607 | ||
14608 | while (1) | |
14609 | { | |
14610 | byte = *buf++; | |
14611 | if ((byte & 128) == 0) | |
14612 | return buf - begin; | |
14613 | } | |
14614 | } | |
14615 | ||
c906108c | 14616 | static void |
e142c38c | 14617 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
14618 | { |
14619 | switch (lang) | |
14620 | { | |
14621 | case DW_LANG_C89: | |
76bee0cc | 14622 | case DW_LANG_C99: |
c906108c | 14623 | case DW_LANG_C: |
e142c38c | 14624 | cu->language = language_c; |
c906108c SS |
14625 | break; |
14626 | case DW_LANG_C_plus_plus: | |
e142c38c | 14627 | cu->language = language_cplus; |
c906108c | 14628 | break; |
6aecb9c2 JB |
14629 | case DW_LANG_D: |
14630 | cu->language = language_d; | |
14631 | break; | |
c906108c SS |
14632 | case DW_LANG_Fortran77: |
14633 | case DW_LANG_Fortran90: | |
b21b22e0 | 14634 | case DW_LANG_Fortran95: |
e142c38c | 14635 | cu->language = language_fortran; |
c906108c | 14636 | break; |
a766d390 DE |
14637 | case DW_LANG_Go: |
14638 | cu->language = language_go; | |
14639 | break; | |
c906108c | 14640 | case DW_LANG_Mips_Assembler: |
e142c38c | 14641 | cu->language = language_asm; |
c906108c | 14642 | break; |
bebd888e | 14643 | case DW_LANG_Java: |
e142c38c | 14644 | cu->language = language_java; |
bebd888e | 14645 | break; |
c906108c | 14646 | case DW_LANG_Ada83: |
8aaf0b47 | 14647 | case DW_LANG_Ada95: |
bc5f45f8 JB |
14648 | cu->language = language_ada; |
14649 | break; | |
72019c9c GM |
14650 | case DW_LANG_Modula2: |
14651 | cu->language = language_m2; | |
14652 | break; | |
fe8e67fd PM |
14653 | case DW_LANG_Pascal83: |
14654 | cu->language = language_pascal; | |
14655 | break; | |
22566fbd DJ |
14656 | case DW_LANG_ObjC: |
14657 | cu->language = language_objc; | |
14658 | break; | |
c906108c SS |
14659 | case DW_LANG_Cobol74: |
14660 | case DW_LANG_Cobol85: | |
c906108c | 14661 | default: |
e142c38c | 14662 | cu->language = language_minimal; |
c906108c SS |
14663 | break; |
14664 | } | |
e142c38c | 14665 | cu->language_defn = language_def (cu->language); |
c906108c SS |
14666 | } |
14667 | ||
14668 | /* Return the named attribute or NULL if not there. */ | |
14669 | ||
14670 | static struct attribute * | |
e142c38c | 14671 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 14672 | { |
a48e046c | 14673 | for (;;) |
c906108c | 14674 | { |
a48e046c TT |
14675 | unsigned int i; |
14676 | struct attribute *spec = NULL; | |
14677 | ||
14678 | for (i = 0; i < die->num_attrs; ++i) | |
14679 | { | |
14680 | if (die->attrs[i].name == name) | |
14681 | return &die->attrs[i]; | |
14682 | if (die->attrs[i].name == DW_AT_specification | |
14683 | || die->attrs[i].name == DW_AT_abstract_origin) | |
14684 | spec = &die->attrs[i]; | |
14685 | } | |
14686 | ||
14687 | if (!spec) | |
14688 | break; | |
c906108c | 14689 | |
f2f0e013 | 14690 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 14691 | } |
c5aa993b | 14692 | |
c906108c SS |
14693 | return NULL; |
14694 | } | |
14695 | ||
348e048f DE |
14696 | /* Return the named attribute or NULL if not there, |
14697 | but do not follow DW_AT_specification, etc. | |
14698 | This is for use in contexts where we're reading .debug_types dies. | |
14699 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
14700 | back up the chain, and we want to go down. */ | |
14701 | ||
14702 | static struct attribute * | |
45e58e77 | 14703 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
14704 | { |
14705 | unsigned int i; | |
14706 | ||
14707 | for (i = 0; i < die->num_attrs; ++i) | |
14708 | if (die->attrs[i].name == name) | |
14709 | return &die->attrs[i]; | |
14710 | ||
14711 | return NULL; | |
14712 | } | |
14713 | ||
05cf31d1 JB |
14714 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
14715 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 14716 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
14717 | |
14718 | static int | |
14719 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
14720 | { | |
14721 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
14722 | ||
14723 | return (attr && DW_UNSND (attr)); | |
14724 | } | |
14725 | ||
3ca72b44 | 14726 | static int |
e142c38c | 14727 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 14728 | { |
05cf31d1 JB |
14729 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
14730 | which value is non-zero. However, we have to be careful with | |
14731 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
14732 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
14733 | end up accidently finding a declaration attribute that belongs | |
14734 | to a different DIE referenced by the specification attribute, | |
14735 | even though the given DIE does not have a declaration attribute. */ | |
14736 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
14737 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
14738 | } |
14739 | ||
63d06c5c | 14740 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 14741 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
14742 | containing the return value on output. If there is no |
14743 | specification, but there is an abstract origin, that is | |
14744 | returned. */ | |
63d06c5c DC |
14745 | |
14746 | static struct die_info * | |
f2f0e013 | 14747 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 14748 | { |
f2f0e013 DJ |
14749 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
14750 | *spec_cu); | |
63d06c5c | 14751 | |
edb3359d DJ |
14752 | if (spec_attr == NULL) |
14753 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
14754 | ||
63d06c5c DC |
14755 | if (spec_attr == NULL) |
14756 | return NULL; | |
14757 | else | |
f2f0e013 | 14758 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 14759 | } |
c906108c | 14760 | |
debd256d | 14761 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
14762 | refers to. |
14763 | NOTE: This is also used as a "cleanup" function. */ | |
14764 | ||
debd256d JB |
14765 | static void |
14766 | free_line_header (struct line_header *lh) | |
14767 | { | |
14768 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 14769 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
14770 | |
14771 | /* Remember that all the lh->file_names[i].name pointers are | |
14772 | pointers into debug_line_buffer, and don't need to be freed. */ | |
14773 | if (lh->file_names) | |
a8bc7b56 | 14774 | xfree (lh->file_names); |
debd256d JB |
14775 | |
14776 | /* Similarly for the include directory names. */ | |
14777 | if (lh->include_dirs) | |
a8bc7b56 | 14778 | xfree (lh->include_dirs); |
debd256d | 14779 | |
a8bc7b56 | 14780 | xfree (lh); |
debd256d JB |
14781 | } |
14782 | ||
debd256d | 14783 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 14784 | |
debd256d JB |
14785 | static void |
14786 | add_include_dir (struct line_header *lh, char *include_dir) | |
c906108c | 14787 | { |
debd256d JB |
14788 | /* Grow the array if necessary. */ |
14789 | if (lh->include_dirs_size == 0) | |
c5aa993b | 14790 | { |
debd256d JB |
14791 | lh->include_dirs_size = 1; /* for testing */ |
14792 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
14793 | * sizeof (*lh->include_dirs)); | |
14794 | } | |
14795 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
14796 | { | |
14797 | lh->include_dirs_size *= 2; | |
14798 | lh->include_dirs = xrealloc (lh->include_dirs, | |
14799 | (lh->include_dirs_size | |
14800 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 14801 | } |
c906108c | 14802 | |
debd256d JB |
14803 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
14804 | } | |
6e70227d | 14805 | |
debd256d | 14806 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 14807 | |
debd256d JB |
14808 | static void |
14809 | add_file_name (struct line_header *lh, | |
14810 | char *name, | |
14811 | unsigned int dir_index, | |
14812 | unsigned int mod_time, | |
14813 | unsigned int length) | |
14814 | { | |
14815 | struct file_entry *fe; | |
14816 | ||
14817 | /* Grow the array if necessary. */ | |
14818 | if (lh->file_names_size == 0) | |
14819 | { | |
14820 | lh->file_names_size = 1; /* for testing */ | |
14821 | lh->file_names = xmalloc (lh->file_names_size | |
14822 | * sizeof (*lh->file_names)); | |
14823 | } | |
14824 | else if (lh->num_file_names >= lh->file_names_size) | |
14825 | { | |
14826 | lh->file_names_size *= 2; | |
14827 | lh->file_names = xrealloc (lh->file_names, | |
14828 | (lh->file_names_size | |
14829 | * sizeof (*lh->file_names))); | |
14830 | } | |
14831 | ||
14832 | fe = &lh->file_names[lh->num_file_names++]; | |
14833 | fe->name = name; | |
14834 | fe->dir_index = dir_index; | |
14835 | fe->mod_time = mod_time; | |
14836 | fe->length = length; | |
aaa75496 | 14837 | fe->included_p = 0; |
cb1df416 | 14838 | fe->symtab = NULL; |
debd256d | 14839 | } |
6e70227d | 14840 | |
36586728 TT |
14841 | /* A convenience function to find the proper .debug_line section for a |
14842 | CU. */ | |
14843 | ||
14844 | static struct dwarf2_section_info * | |
14845 | get_debug_line_section (struct dwarf2_cu *cu) | |
14846 | { | |
14847 | struct dwarf2_section_info *section; | |
14848 | ||
14849 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
14850 | DWO file. */ | |
14851 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
14852 | section = &cu->dwo_unit->dwo_file->sections.line; | |
14853 | else if (cu->per_cu->is_dwz) | |
14854 | { | |
14855 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
14856 | ||
14857 | section = &dwz->line; | |
14858 | } | |
14859 | else | |
14860 | section = &dwarf2_per_objfile->line; | |
14861 | ||
14862 | return section; | |
14863 | } | |
14864 | ||
debd256d | 14865 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 14866 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 14867 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
14868 | |
14869 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
14870 | the returned object point into the dwarf line section buffer, |
14871 | and must not be freed. */ | |
ae2de4f8 | 14872 | |
debd256d | 14873 | static struct line_header * |
3019eac3 | 14874 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
14875 | { |
14876 | struct cleanup *back_to; | |
14877 | struct line_header *lh; | |
fe1b8b76 | 14878 | gdb_byte *line_ptr; |
c764a876 | 14879 | unsigned int bytes_read, offset_size; |
debd256d JB |
14880 | int i; |
14881 | char *cur_dir, *cur_file; | |
3019eac3 DE |
14882 | struct dwarf2_section_info *section; |
14883 | bfd *abfd; | |
14884 | ||
36586728 | 14885 | section = get_debug_line_section (cu); |
3019eac3 DE |
14886 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
14887 | if (section->buffer == NULL) | |
debd256d | 14888 | { |
3019eac3 DE |
14889 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
14890 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
14891 | else | |
14892 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
14893 | return 0; |
14894 | } | |
14895 | ||
fceca515 DE |
14896 | /* We can't do this until we know the section is non-empty. |
14897 | Only then do we know we have such a section. */ | |
14898 | abfd = section->asection->owner; | |
14899 | ||
a738430d MK |
14900 | /* Make sure that at least there's room for the total_length field. |
14901 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 14902 | if (offset + 4 >= section->size) |
debd256d | 14903 | { |
4d3c2250 | 14904 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
14905 | return 0; |
14906 | } | |
14907 | ||
14908 | lh = xmalloc (sizeof (*lh)); | |
14909 | memset (lh, 0, sizeof (*lh)); | |
14910 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
14911 | (void *) lh); | |
14912 | ||
3019eac3 | 14913 | line_ptr = section->buffer + offset; |
debd256d | 14914 | |
a738430d | 14915 | /* Read in the header. */ |
6e70227d | 14916 | lh->total_length = |
c764a876 DE |
14917 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
14918 | &bytes_read, &offset_size); | |
debd256d | 14919 | line_ptr += bytes_read; |
3019eac3 | 14920 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 14921 | { |
4d3c2250 | 14922 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
14923 | return 0; |
14924 | } | |
14925 | lh->statement_program_end = line_ptr + lh->total_length; | |
14926 | lh->version = read_2_bytes (abfd, line_ptr); | |
14927 | line_ptr += 2; | |
c764a876 DE |
14928 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
14929 | line_ptr += offset_size; | |
debd256d JB |
14930 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
14931 | line_ptr += 1; | |
2dc7f7b3 TT |
14932 | if (lh->version >= 4) |
14933 | { | |
14934 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
14935 | line_ptr += 1; | |
14936 | } | |
14937 | else | |
14938 | lh->maximum_ops_per_instruction = 1; | |
14939 | ||
14940 | if (lh->maximum_ops_per_instruction == 0) | |
14941 | { | |
14942 | lh->maximum_ops_per_instruction = 1; | |
14943 | complaint (&symfile_complaints, | |
3e43a32a MS |
14944 | _("invalid maximum_ops_per_instruction " |
14945 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
14946 | } |
14947 | ||
debd256d JB |
14948 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
14949 | line_ptr += 1; | |
14950 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
14951 | line_ptr += 1; | |
14952 | lh->line_range = read_1_byte (abfd, line_ptr); | |
14953 | line_ptr += 1; | |
14954 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
14955 | line_ptr += 1; | |
14956 | lh->standard_opcode_lengths | |
fe1b8b76 | 14957 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
14958 | |
14959 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
14960 | for (i = 1; i < lh->opcode_base; ++i) | |
14961 | { | |
14962 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
14963 | line_ptr += 1; | |
14964 | } | |
14965 | ||
a738430d | 14966 | /* Read directory table. */ |
9b1c24c8 | 14967 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
14968 | { |
14969 | line_ptr += bytes_read; | |
14970 | add_include_dir (lh, cur_dir); | |
14971 | } | |
14972 | line_ptr += bytes_read; | |
14973 | ||
a738430d | 14974 | /* Read file name table. */ |
9b1c24c8 | 14975 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
14976 | { |
14977 | unsigned int dir_index, mod_time, length; | |
14978 | ||
14979 | line_ptr += bytes_read; | |
14980 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
14981 | line_ptr += bytes_read; | |
14982 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
14983 | line_ptr += bytes_read; | |
14984 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
14985 | line_ptr += bytes_read; | |
14986 | ||
14987 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
14988 | } | |
14989 | line_ptr += bytes_read; | |
6e70227d | 14990 | lh->statement_program_start = line_ptr; |
debd256d | 14991 | |
3019eac3 | 14992 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 14993 | complaint (&symfile_complaints, |
3e43a32a MS |
14994 | _("line number info header doesn't " |
14995 | "fit in `.debug_line' section")); | |
debd256d JB |
14996 | |
14997 | discard_cleanups (back_to); | |
14998 | return lh; | |
14999 | } | |
c906108c | 15000 | |
c6da4cef DE |
15001 | /* Subroutine of dwarf_decode_lines to simplify it. |
15002 | Return the file name of the psymtab for included file FILE_INDEX | |
15003 | in line header LH of PST. | |
15004 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15005 | If space for the result is malloc'd, it will be freed by a cleanup. | |
15006 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
15007 | ||
15008 | static char * | |
15009 | psymtab_include_file_name (const struct line_header *lh, int file_index, | |
15010 | const struct partial_symtab *pst, | |
15011 | const char *comp_dir) | |
15012 | { | |
15013 | const struct file_entry fe = lh->file_names [file_index]; | |
15014 | char *include_name = fe.name; | |
15015 | char *include_name_to_compare = include_name; | |
15016 | char *dir_name = NULL; | |
72b9f47f TT |
15017 | const char *pst_filename; |
15018 | char *copied_name = NULL; | |
c6da4cef DE |
15019 | int file_is_pst; |
15020 | ||
15021 | if (fe.dir_index) | |
15022 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
15023 | ||
15024 | if (!IS_ABSOLUTE_PATH (include_name) | |
15025 | && (dir_name != NULL || comp_dir != NULL)) | |
15026 | { | |
15027 | /* Avoid creating a duplicate psymtab for PST. | |
15028 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
15029 | Before we do the comparison, however, we need to account | |
15030 | for DIR_NAME and COMP_DIR. | |
15031 | First prepend dir_name (if non-NULL). If we still don't | |
15032 | have an absolute path prepend comp_dir (if non-NULL). | |
15033 | However, the directory we record in the include-file's | |
15034 | psymtab does not contain COMP_DIR (to match the | |
15035 | corresponding symtab(s)). | |
15036 | ||
15037 | Example: | |
15038 | ||
15039 | bash$ cd /tmp | |
15040 | bash$ gcc -g ./hello.c | |
15041 | include_name = "hello.c" | |
15042 | dir_name = "." | |
15043 | DW_AT_comp_dir = comp_dir = "/tmp" | |
15044 | DW_AT_name = "./hello.c" */ | |
15045 | ||
15046 | if (dir_name != NULL) | |
15047 | { | |
15048 | include_name = concat (dir_name, SLASH_STRING, | |
15049 | include_name, (char *)NULL); | |
15050 | include_name_to_compare = include_name; | |
15051 | make_cleanup (xfree, include_name); | |
15052 | } | |
15053 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
15054 | { | |
15055 | include_name_to_compare = concat (comp_dir, SLASH_STRING, | |
15056 | include_name, (char *)NULL); | |
15057 | } | |
15058 | } | |
15059 | ||
15060 | pst_filename = pst->filename; | |
15061 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
15062 | { | |
72b9f47f TT |
15063 | copied_name = concat (pst->dirname, SLASH_STRING, |
15064 | pst_filename, (char *)NULL); | |
15065 | pst_filename = copied_name; | |
c6da4cef DE |
15066 | } |
15067 | ||
1e3fad37 | 15068 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef DE |
15069 | |
15070 | if (include_name_to_compare != include_name) | |
15071 | xfree (include_name_to_compare); | |
72b9f47f TT |
15072 | if (copied_name != NULL) |
15073 | xfree (copied_name); | |
c6da4cef DE |
15074 | |
15075 | if (file_is_pst) | |
15076 | return NULL; | |
15077 | return include_name; | |
15078 | } | |
15079 | ||
c91513d8 PP |
15080 | /* Ignore this record_line request. */ |
15081 | ||
15082 | static void | |
15083 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
15084 | { | |
15085 | return; | |
15086 | } | |
15087 | ||
f3f5162e DE |
15088 | /* Subroutine of dwarf_decode_lines to simplify it. |
15089 | Process the line number information in LH. */ | |
debd256d | 15090 | |
c906108c | 15091 | static void |
f3f5162e DE |
15092 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
15093 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 15094 | { |
a8c50c1f | 15095 | gdb_byte *line_ptr, *extended_end; |
fe1b8b76 | 15096 | gdb_byte *line_end; |
a8c50c1f | 15097 | unsigned int bytes_read, extended_len; |
c906108c | 15098 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
15099 | CORE_ADDR baseaddr; |
15100 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 15101 | bfd *abfd = objfile->obfd; |
fbf65064 | 15102 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 15103 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 15104 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
15105 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
15106 | = record_line; | |
e142c38c DJ |
15107 | |
15108 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15109 | |
debd256d JB |
15110 | line_ptr = lh->statement_program_start; |
15111 | line_end = lh->statement_program_end; | |
c906108c SS |
15112 | |
15113 | /* Read the statement sequences until there's nothing left. */ | |
15114 | while (line_ptr < line_end) | |
15115 | { | |
15116 | /* state machine registers */ | |
15117 | CORE_ADDR address = 0; | |
15118 | unsigned int file = 1; | |
15119 | unsigned int line = 1; | |
15120 | unsigned int column = 0; | |
debd256d | 15121 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
15122 | int basic_block = 0; |
15123 | int end_sequence = 0; | |
fbf65064 | 15124 | CORE_ADDR addr; |
2dc7f7b3 | 15125 | unsigned char op_index = 0; |
c906108c | 15126 | |
aaa75496 | 15127 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 15128 | { |
aaa75496 | 15129 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
15130 | /* lh->include_dirs and lh->file_names are 0-based, but the |
15131 | directory and file name numbers in the statement program | |
15132 | are 1-based. */ | |
15133 | struct file_entry *fe = &lh->file_names[file - 1]; | |
4f1520fb | 15134 | char *dir = NULL; |
a738430d | 15135 | |
debd256d JB |
15136 | if (fe->dir_index) |
15137 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
15138 | |
15139 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
15140 | } |
15141 | ||
a738430d | 15142 | /* Decode the table. */ |
c5aa993b | 15143 | while (!end_sequence) |
c906108c SS |
15144 | { |
15145 | op_code = read_1_byte (abfd, line_ptr); | |
15146 | line_ptr += 1; | |
59205f5a JB |
15147 | if (line_ptr > line_end) |
15148 | { | |
15149 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
15150 | break; | |
15151 | } | |
9aa1fe7e | 15152 | |
debd256d | 15153 | if (op_code >= lh->opcode_base) |
6e70227d | 15154 | { |
a738430d | 15155 | /* Special operand. */ |
debd256d | 15156 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
15157 | address += (((op_index + (adj_opcode / lh->line_range)) |
15158 | / lh->maximum_ops_per_instruction) | |
15159 | * lh->minimum_instruction_length); | |
15160 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
15161 | % lh->maximum_ops_per_instruction); | |
debd256d | 15162 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 15163 | if (lh->num_file_names < file || file == 0) |
25e43795 | 15164 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
15165 | /* For now we ignore lines not starting on an |
15166 | instruction boundary. */ | |
15167 | else if (op_index == 0) | |
25e43795 DJ |
15168 | { |
15169 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 15170 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15171 | { |
15172 | if (last_subfile != current_subfile) | |
15173 | { | |
15174 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15175 | if (last_subfile) | |
c91513d8 | 15176 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15177 | last_subfile = current_subfile; |
15178 | } | |
25e43795 | 15179 | /* Append row to matrix using current values. */ |
7019d805 | 15180 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15181 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 15182 | } |
25e43795 | 15183 | } |
ca5f395d | 15184 | basic_block = 0; |
9aa1fe7e GK |
15185 | } |
15186 | else switch (op_code) | |
c906108c SS |
15187 | { |
15188 | case DW_LNS_extended_op: | |
3e43a32a MS |
15189 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
15190 | &bytes_read); | |
473b7be6 | 15191 | line_ptr += bytes_read; |
a8c50c1f | 15192 | extended_end = line_ptr + extended_len; |
c906108c SS |
15193 | extended_op = read_1_byte (abfd, line_ptr); |
15194 | line_ptr += 1; | |
15195 | switch (extended_op) | |
15196 | { | |
15197 | case DW_LNE_end_sequence: | |
c91513d8 | 15198 | p_record_line = record_line; |
c906108c | 15199 | end_sequence = 1; |
c906108c SS |
15200 | break; |
15201 | case DW_LNE_set_address: | |
e7c27a73 | 15202 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
15203 | |
15204 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15205 | { | |
15206 | /* This line table is for a function which has been | |
15207 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
15208 | ||
15209 | long line_offset | |
36586728 | 15210 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
15211 | |
15212 | complaint (&symfile_complaints, | |
15213 | _(".debug_line address at offset 0x%lx is 0 " | |
15214 | "[in module %s]"), | |
bb5ed363 | 15215 | line_offset, objfile->name); |
c91513d8 PP |
15216 | p_record_line = noop_record_line; |
15217 | } | |
15218 | ||
2dc7f7b3 | 15219 | op_index = 0; |
107d2387 AC |
15220 | line_ptr += bytes_read; |
15221 | address += baseaddr; | |
c906108c SS |
15222 | break; |
15223 | case DW_LNE_define_file: | |
debd256d JB |
15224 | { |
15225 | char *cur_file; | |
15226 | unsigned int dir_index, mod_time, length; | |
6e70227d | 15227 | |
3e43a32a MS |
15228 | cur_file = read_direct_string (abfd, line_ptr, |
15229 | &bytes_read); | |
debd256d JB |
15230 | line_ptr += bytes_read; |
15231 | dir_index = | |
15232 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15233 | line_ptr += bytes_read; | |
15234 | mod_time = | |
15235 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15236 | line_ptr += bytes_read; | |
15237 | length = | |
15238 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15239 | line_ptr += bytes_read; | |
15240 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15241 | } | |
c906108c | 15242 | break; |
d0c6ba3d CC |
15243 | case DW_LNE_set_discriminator: |
15244 | /* The discriminator is not interesting to the debugger; | |
15245 | just ignore it. */ | |
15246 | line_ptr = extended_end; | |
15247 | break; | |
c906108c | 15248 | default: |
4d3c2250 | 15249 | complaint (&symfile_complaints, |
e2e0b3e5 | 15250 | _("mangled .debug_line section")); |
debd256d | 15251 | return; |
c906108c | 15252 | } |
a8c50c1f DJ |
15253 | /* Make sure that we parsed the extended op correctly. If e.g. |
15254 | we expected a different address size than the producer used, | |
15255 | we may have read the wrong number of bytes. */ | |
15256 | if (line_ptr != extended_end) | |
15257 | { | |
15258 | complaint (&symfile_complaints, | |
15259 | _("mangled .debug_line section")); | |
15260 | return; | |
15261 | } | |
c906108c SS |
15262 | break; |
15263 | case DW_LNS_copy: | |
59205f5a | 15264 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15265 | dwarf2_debug_line_missing_file_complaint (); |
15266 | else | |
366da635 | 15267 | { |
25e43795 | 15268 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 15269 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15270 | { |
15271 | if (last_subfile != current_subfile) | |
15272 | { | |
15273 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15274 | if (last_subfile) | |
c91513d8 | 15275 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15276 | last_subfile = current_subfile; |
15277 | } | |
7019d805 | 15278 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15279 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 15280 | } |
366da635 | 15281 | } |
c906108c SS |
15282 | basic_block = 0; |
15283 | break; | |
15284 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
15285 | { |
15286 | CORE_ADDR adjust | |
15287 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15288 | ||
15289 | address += (((op_index + adjust) | |
15290 | / lh->maximum_ops_per_instruction) | |
15291 | * lh->minimum_instruction_length); | |
15292 | op_index = ((op_index + adjust) | |
15293 | % lh->maximum_ops_per_instruction); | |
15294 | line_ptr += bytes_read; | |
15295 | } | |
c906108c SS |
15296 | break; |
15297 | case DW_LNS_advance_line: | |
15298 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
15299 | line_ptr += bytes_read; | |
15300 | break; | |
15301 | case DW_LNS_set_file: | |
debd256d | 15302 | { |
a738430d MK |
15303 | /* The arrays lh->include_dirs and lh->file_names are |
15304 | 0-based, but the directory and file name numbers in | |
15305 | the statement program are 1-based. */ | |
debd256d | 15306 | struct file_entry *fe; |
4f1520fb | 15307 | char *dir = NULL; |
a738430d | 15308 | |
debd256d JB |
15309 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
15310 | line_ptr += bytes_read; | |
59205f5a | 15311 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15312 | dwarf2_debug_line_missing_file_complaint (); |
15313 | else | |
15314 | { | |
15315 | fe = &lh->file_names[file - 1]; | |
15316 | if (fe->dir_index) | |
15317 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15318 | if (!decode_for_pst_p) | |
15319 | { | |
15320 | last_subfile = current_subfile; | |
15321 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15322 | } | |
15323 | } | |
debd256d | 15324 | } |
c906108c SS |
15325 | break; |
15326 | case DW_LNS_set_column: | |
15327 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15328 | line_ptr += bytes_read; | |
15329 | break; | |
15330 | case DW_LNS_negate_stmt: | |
15331 | is_stmt = (!is_stmt); | |
15332 | break; | |
15333 | case DW_LNS_set_basic_block: | |
15334 | basic_block = 1; | |
15335 | break; | |
c2c6d25f JM |
15336 | /* Add to the address register of the state machine the |
15337 | address increment value corresponding to special opcode | |
a738430d MK |
15338 | 255. I.e., this value is scaled by the minimum |
15339 | instruction length since special opcode 255 would have | |
b021a221 | 15340 | scaled the increment. */ |
c906108c | 15341 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
15342 | { |
15343 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
15344 | ||
15345 | address += (((op_index + adjust) | |
15346 | / lh->maximum_ops_per_instruction) | |
15347 | * lh->minimum_instruction_length); | |
15348 | op_index = ((op_index + adjust) | |
15349 | % lh->maximum_ops_per_instruction); | |
15350 | } | |
c906108c SS |
15351 | break; |
15352 | case DW_LNS_fixed_advance_pc: | |
15353 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 15354 | op_index = 0; |
c906108c SS |
15355 | line_ptr += 2; |
15356 | break; | |
9aa1fe7e | 15357 | default: |
a738430d MK |
15358 | { |
15359 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 15360 | int i; |
a738430d | 15361 | |
debd256d | 15362 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
15363 | { |
15364 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15365 | line_ptr += bytes_read; | |
15366 | } | |
15367 | } | |
c906108c SS |
15368 | } |
15369 | } | |
59205f5a JB |
15370 | if (lh->num_file_names < file || file == 0) |
15371 | dwarf2_debug_line_missing_file_complaint (); | |
15372 | else | |
15373 | { | |
15374 | lh->file_names[file - 1].included_p = 1; | |
15375 | if (!decode_for_pst_p) | |
fbf65064 UW |
15376 | { |
15377 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 15378 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 15379 | } |
59205f5a | 15380 | } |
c906108c | 15381 | } |
f3f5162e DE |
15382 | } |
15383 | ||
15384 | /* Decode the Line Number Program (LNP) for the given line_header | |
15385 | structure and CU. The actual information extracted and the type | |
15386 | of structures created from the LNP depends on the value of PST. | |
15387 | ||
15388 | 1. If PST is NULL, then this procedure uses the data from the program | |
15389 | to create all necessary symbol tables, and their linetables. | |
15390 | ||
15391 | 2. If PST is not NULL, this procedure reads the program to determine | |
15392 | the list of files included by the unit represented by PST, and | |
15393 | builds all the associated partial symbol tables. | |
15394 | ||
15395 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15396 | It is used for relative paths in the line table. | |
15397 | NOTE: When processing partial symtabs (pst != NULL), | |
15398 | comp_dir == pst->dirname. | |
15399 | ||
15400 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
15401 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
15402 | symtab we don't use it in the name of the psymtabs we create. | |
15403 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
15404 | A good testcase for this is mb-inline.exp. */ | |
15405 | ||
15406 | static void | |
15407 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
15408 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
15409 | int want_line_info) | |
15410 | { | |
15411 | struct objfile *objfile = cu->objfile; | |
15412 | const int decode_for_pst_p = (pst != NULL); | |
15413 | struct subfile *first_subfile = current_subfile; | |
15414 | ||
15415 | if (want_line_info) | |
15416 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
15417 | |
15418 | if (decode_for_pst_p) | |
15419 | { | |
15420 | int file_index; | |
15421 | ||
15422 | /* Now that we're done scanning the Line Header Program, we can | |
15423 | create the psymtab of each included file. */ | |
15424 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
15425 | if (lh->file_names[file_index].included_p == 1) | |
15426 | { | |
c6da4cef DE |
15427 | char *include_name = |
15428 | psymtab_include_file_name (lh, file_index, pst, comp_dir); | |
15429 | if (include_name != NULL) | |
aaa75496 JB |
15430 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
15431 | } | |
15432 | } | |
cb1df416 DJ |
15433 | else |
15434 | { | |
15435 | /* Make sure a symtab is created for every file, even files | |
15436 | which contain only variables (i.e. no code with associated | |
15437 | line numbers). */ | |
cb1df416 | 15438 | int i; |
cb1df416 DJ |
15439 | |
15440 | for (i = 0; i < lh->num_file_names; i++) | |
15441 | { | |
15442 | char *dir = NULL; | |
f3f5162e | 15443 | struct file_entry *fe; |
9a619af0 | 15444 | |
cb1df416 DJ |
15445 | fe = &lh->file_names[i]; |
15446 | if (fe->dir_index) | |
15447 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15448 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15449 | ||
15450 | /* Skip the main file; we don't need it, and it must be | |
15451 | allocated last, so that it will show up before the | |
15452 | non-primary symtabs in the objfile's symtab list. */ | |
15453 | if (current_subfile == first_subfile) | |
15454 | continue; | |
15455 | ||
15456 | if (current_subfile->symtab == NULL) | |
15457 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 15458 | objfile); |
cb1df416 DJ |
15459 | fe->symtab = current_subfile->symtab; |
15460 | } | |
15461 | } | |
c906108c SS |
15462 | } |
15463 | ||
15464 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
15465 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
15466 | or NULL if not known. COMP_DIR is the compilation directory for the |
15467 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
15468 | This routine tries to keep line numbers from identical absolute and |
15469 | relative file names in a common subfile. | |
15470 | ||
15471 | Using the `list' example from the GDB testsuite, which resides in | |
15472 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
15473 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
15474 | ||
c5aa993b JM |
15475 | DW_AT_name: /srcdir/list0.c |
15476 | DW_AT_comp_dir: /compdir | |
357e46e7 | 15477 | files.files[0].name: list0.h |
c5aa993b | 15478 | files.files[0].dir: /srcdir |
357e46e7 | 15479 | files.files[1].name: list0.c |
c5aa993b | 15480 | files.files[1].dir: /srcdir |
c906108c SS |
15481 | |
15482 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
15483 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
15484 | start_subfile will ensure that this happens provided that we pass the | |
15485 | concatenation of files.files[1].dir and files.files[1].name as the | |
15486 | subfile's name. */ | |
c906108c SS |
15487 | |
15488 | static void | |
3e43a32a MS |
15489 | dwarf2_start_subfile (char *filename, const char *dirname, |
15490 | const char *comp_dir) | |
c906108c | 15491 | { |
4f1520fb FR |
15492 | char *fullname; |
15493 | ||
15494 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
15495 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
15496 | second argument to start_subfile. To be consistent, we do the | |
15497 | same here. In order not to lose the line information directory, | |
15498 | we concatenate it to the filename when it makes sense. | |
15499 | Note that the Dwarf3 standard says (speaking of filenames in line | |
15500 | information): ``The directory index is ignored for file names | |
15501 | that represent full path names''. Thus ignoring dirname in the | |
15502 | `else' branch below isn't an issue. */ | |
c906108c | 15503 | |
d5166ae1 | 15504 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
4f1520fb FR |
15505 | fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL); |
15506 | else | |
15507 | fullname = filename; | |
c906108c | 15508 | |
4f1520fb FR |
15509 | start_subfile (fullname, comp_dir); |
15510 | ||
15511 | if (fullname != filename) | |
15512 | xfree (fullname); | |
c906108c SS |
15513 | } |
15514 | ||
f4dc4d17 DE |
15515 | /* Start a symtab for DWARF. |
15516 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
15517 | ||
15518 | static void | |
15519 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15520 | char *name, char *comp_dir, CORE_ADDR low_pc) | |
15521 | { | |
15522 | start_symtab (name, comp_dir, low_pc); | |
15523 | record_debugformat ("DWARF 2"); | |
15524 | record_producer (cu->producer); | |
15525 | ||
15526 | /* We assume that we're processing GCC output. */ | |
15527 | processing_gcc_compilation = 2; | |
15528 | ||
15529 | processing_has_namespace_info = 0; | |
15530 | } | |
15531 | ||
4c2df51b DJ |
15532 | static void |
15533 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 15534 | struct dwarf2_cu *cu) |
4c2df51b | 15535 | { |
e7c27a73 DJ |
15536 | struct objfile *objfile = cu->objfile; |
15537 | struct comp_unit_head *cu_header = &cu->header; | |
15538 | ||
4c2df51b DJ |
15539 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
15540 | code here to turn a symbol with DW_AT_external and a | |
15541 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
15542 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
15543 | with some versions of binutils) where shared libraries could have | |
15544 | relocations against symbols in their debug information - the | |
15545 | minimal symbol would have the right address, but the debug info | |
15546 | would not. It's no longer necessary, because we will explicitly | |
15547 | apply relocations when we read in the debug information now. */ | |
15548 | ||
15549 | /* A DW_AT_location attribute with no contents indicates that a | |
15550 | variable has been optimized away. */ | |
15551 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
15552 | { | |
15553 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
15554 | return; | |
15555 | } | |
15556 | ||
15557 | /* Handle one degenerate form of location expression specially, to | |
15558 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
15559 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
15560 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
15561 | |
15562 | if (attr_form_is_block (attr) | |
3019eac3 DE |
15563 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
15564 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
15565 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
15566 | && (DW_BLOCK (attr)->size | |
15567 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 15568 | { |
891d2f0b | 15569 | unsigned int dummy; |
4c2df51b | 15570 | |
3019eac3 DE |
15571 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
15572 | SYMBOL_VALUE_ADDRESS (sym) = | |
15573 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
15574 | else | |
15575 | SYMBOL_VALUE_ADDRESS (sym) = | |
15576 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
907fc202 | 15577 | SYMBOL_CLASS (sym) = LOC_STATIC; |
4c2df51b DJ |
15578 | fixup_symbol_section (sym, objfile); |
15579 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
15580 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
15581 | return; |
15582 | } | |
15583 | ||
15584 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
15585 | expression evaluator, and use LOC_COMPUTED only when necessary | |
15586 | (i.e. when the value of a register or memory location is | |
15587 | referenced, or a thread-local block, etc.). Then again, it might | |
15588 | not be worthwhile. I'm assuming that it isn't unless performance | |
15589 | or memory numbers show me otherwise. */ | |
15590 | ||
e7c27a73 | 15591 | dwarf2_symbol_mark_computed (attr, sym, cu); |
4c2df51b | 15592 | SYMBOL_CLASS (sym) = LOC_COMPUTED; |
8be455d7 JK |
15593 | |
15594 | if (SYMBOL_COMPUTED_OPS (sym) == &dwarf2_loclist_funcs) | |
15595 | cu->has_loclist = 1; | |
4c2df51b DJ |
15596 | } |
15597 | ||
c906108c SS |
15598 | /* Given a pointer to a DWARF information entry, figure out if we need |
15599 | to make a symbol table entry for it, and if so, create a new entry | |
15600 | and return a pointer to it. | |
15601 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
15602 | used the passed type. |
15603 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
15604 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
15605 | |
15606 | static struct symbol * | |
34eaf542 TT |
15607 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
15608 | struct symbol *space) | |
c906108c | 15609 | { |
e7c27a73 | 15610 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15611 | struct symbol *sym = NULL; |
15612 | char *name; | |
15613 | struct attribute *attr = NULL; | |
15614 | struct attribute *attr2 = NULL; | |
e142c38c | 15615 | CORE_ADDR baseaddr; |
e37fd15a SW |
15616 | struct pending **list_to_add = NULL; |
15617 | ||
edb3359d | 15618 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
15619 | |
15620 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15621 | |
94af9270 | 15622 | name = dwarf2_name (die, cu); |
c906108c SS |
15623 | if (name) |
15624 | { | |
94af9270 | 15625 | const char *linkagename; |
34eaf542 | 15626 | int suppress_add = 0; |
94af9270 | 15627 | |
34eaf542 TT |
15628 | if (space) |
15629 | sym = space; | |
15630 | else | |
15631 | sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol); | |
c906108c | 15632 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
15633 | |
15634 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
33e5013e | 15635 | SYMBOL_SET_LANGUAGE (sym, cu->language); |
94af9270 KS |
15636 | linkagename = dwarf2_physname (name, die, cu); |
15637 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 15638 | |
f55ee35c JK |
15639 | /* Fortran does not have mangling standard and the mangling does differ |
15640 | between gfortran, iFort etc. */ | |
15641 | if (cu->language == language_fortran | |
b250c185 | 15642 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d SW |
15643 | symbol_set_demangled_name (&(sym->ginfo), |
15644 | (char *) dwarf2_full_name (name, die, cu), | |
15645 | NULL); | |
f55ee35c | 15646 | |
c906108c | 15647 | /* Default assumptions. |
c5aa993b | 15648 | Use the passed type or decode it from the die. */ |
176620f1 | 15649 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
875dc2fc | 15650 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
15651 | if (type != NULL) |
15652 | SYMBOL_TYPE (sym) = type; | |
15653 | else | |
e7c27a73 | 15654 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
15655 | attr = dwarf2_attr (die, |
15656 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
15657 | cu); | |
c906108c SS |
15658 | if (attr) |
15659 | { | |
15660 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
15661 | } | |
cb1df416 | 15662 | |
edb3359d DJ |
15663 | attr = dwarf2_attr (die, |
15664 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
15665 | cu); | |
cb1df416 DJ |
15666 | if (attr) |
15667 | { | |
15668 | int file_index = DW_UNSND (attr); | |
9a619af0 | 15669 | |
cb1df416 DJ |
15670 | if (cu->line_header == NULL |
15671 | || file_index > cu->line_header->num_file_names) | |
15672 | complaint (&symfile_complaints, | |
15673 | _("file index out of range")); | |
1c3d648d | 15674 | else if (file_index > 0) |
cb1df416 DJ |
15675 | { |
15676 | struct file_entry *fe; | |
9a619af0 | 15677 | |
cb1df416 DJ |
15678 | fe = &cu->line_header->file_names[file_index - 1]; |
15679 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
15680 | } | |
15681 | } | |
15682 | ||
c906108c SS |
15683 | switch (die->tag) |
15684 | { | |
15685 | case DW_TAG_label: | |
e142c38c | 15686 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
15687 | if (attr) |
15688 | { | |
15689 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
15690 | } | |
0f5238ed TT |
15691 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
15692 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
c906108c | 15693 | SYMBOL_CLASS (sym) = LOC_LABEL; |
0f5238ed | 15694 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
15695 | break; |
15696 | case DW_TAG_subprogram: | |
15697 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
15698 | finish_block. */ | |
15699 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
e142c38c | 15700 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
15701 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
15702 | || cu->language == language_ada) | |
c906108c | 15703 | { |
2cfa0c8d JB |
15704 | /* Subprograms marked external are stored as a global symbol. |
15705 | Ada subprograms, whether marked external or not, are always | |
15706 | stored as a global symbol, because we want to be able to | |
15707 | access them globally. For instance, we want to be able | |
15708 | to break on a nested subprogram without having to | |
15709 | specify the context. */ | |
e37fd15a | 15710 | list_to_add = &global_symbols; |
c906108c SS |
15711 | } |
15712 | else | |
15713 | { | |
e37fd15a | 15714 | list_to_add = cu->list_in_scope; |
c906108c SS |
15715 | } |
15716 | break; | |
edb3359d DJ |
15717 | case DW_TAG_inlined_subroutine: |
15718 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
15719 | finish_block. */ | |
15720 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
15721 | SYMBOL_INLINED (sym) = 1; | |
481860b3 | 15722 | list_to_add = cu->list_in_scope; |
edb3359d | 15723 | break; |
34eaf542 TT |
15724 | case DW_TAG_template_value_param: |
15725 | suppress_add = 1; | |
15726 | /* Fall through. */ | |
72929c62 | 15727 | case DW_TAG_constant: |
c906108c | 15728 | case DW_TAG_variable: |
254e6b9e | 15729 | case DW_TAG_member: |
0963b4bd MS |
15730 | /* Compilation with minimal debug info may result in |
15731 | variables with missing type entries. Change the | |
15732 | misleading `void' type to something sensible. */ | |
c906108c | 15733 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 15734 | SYMBOL_TYPE (sym) |
46bf5051 | 15735 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 15736 | |
e142c38c | 15737 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
15738 | /* In the case of DW_TAG_member, we should only be called for |
15739 | static const members. */ | |
15740 | if (die->tag == DW_TAG_member) | |
15741 | { | |
3863f96c DE |
15742 | /* dwarf2_add_field uses die_is_declaration, |
15743 | so we do the same. */ | |
254e6b9e DE |
15744 | gdb_assert (die_is_declaration (die, cu)); |
15745 | gdb_assert (attr); | |
15746 | } | |
c906108c SS |
15747 | if (attr) |
15748 | { | |
e7c27a73 | 15749 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 15750 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 15751 | if (!suppress_add) |
34eaf542 TT |
15752 | { |
15753 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 15754 | list_to_add = &global_symbols; |
34eaf542 | 15755 | else |
e37fd15a | 15756 | list_to_add = cu->list_in_scope; |
34eaf542 | 15757 | } |
c906108c SS |
15758 | break; |
15759 | } | |
e142c38c | 15760 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
15761 | if (attr) |
15762 | { | |
e7c27a73 | 15763 | var_decode_location (attr, sym, cu); |
e142c38c | 15764 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
15765 | |
15766 | /* Fortran explicitly imports any global symbols to the local | |
15767 | scope by DW_TAG_common_block. */ | |
15768 | if (cu->language == language_fortran && die->parent | |
15769 | && die->parent->tag == DW_TAG_common_block) | |
15770 | attr2 = NULL; | |
15771 | ||
caac4577 JG |
15772 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
15773 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
15774 | && !dwarf2_per_objfile->has_section_at_zero) | |
15775 | { | |
15776 | /* When a static variable is eliminated by the linker, | |
15777 | the corresponding debug information is not stripped | |
15778 | out, but the variable address is set to null; | |
15779 | do not add such variables into symbol table. */ | |
15780 | } | |
15781 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 15782 | { |
f55ee35c JK |
15783 | /* Workaround gfortran PR debug/40040 - it uses |
15784 | DW_AT_location for variables in -fPIC libraries which may | |
15785 | get overriden by other libraries/executable and get | |
15786 | a different address. Resolve it by the minimal symbol | |
15787 | which may come from inferior's executable using copy | |
15788 | relocation. Make this workaround only for gfortran as for | |
15789 | other compilers GDB cannot guess the minimal symbol | |
15790 | Fortran mangling kind. */ | |
15791 | if (cu->language == language_fortran && die->parent | |
15792 | && die->parent->tag == DW_TAG_module | |
15793 | && cu->producer | |
15794 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
15795 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; | |
15796 | ||
1c809c68 TT |
15797 | /* A variable with DW_AT_external is never static, |
15798 | but it may be block-scoped. */ | |
15799 | list_to_add = (cu->list_in_scope == &file_symbols | |
15800 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 15801 | } |
c906108c | 15802 | else |
e37fd15a | 15803 | list_to_add = cu->list_in_scope; |
c906108c SS |
15804 | } |
15805 | else | |
15806 | { | |
15807 | /* We do not know the address of this symbol. | |
c5aa993b JM |
15808 | If it is an external symbol and we have type information |
15809 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
15810 | The address of the variable will then be determined from | |
15811 | the minimal symbol table whenever the variable is | |
15812 | referenced. */ | |
e142c38c | 15813 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
15814 | |
15815 | /* Fortran explicitly imports any global symbols to the local | |
15816 | scope by DW_TAG_common_block. */ | |
15817 | if (cu->language == language_fortran && die->parent | |
15818 | && die->parent->tag == DW_TAG_common_block) | |
15819 | { | |
15820 | /* SYMBOL_CLASS doesn't matter here because | |
15821 | read_common_block is going to reset it. */ | |
15822 | if (!suppress_add) | |
15823 | list_to_add = cu->list_in_scope; | |
15824 | } | |
15825 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
15826 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 15827 | { |
0fe7935b DJ |
15828 | /* A variable with DW_AT_external is never static, but it |
15829 | may be block-scoped. */ | |
15830 | list_to_add = (cu->list_in_scope == &file_symbols | |
15831 | ? &global_symbols : cu->list_in_scope); | |
15832 | ||
c906108c | 15833 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
c906108c | 15834 | } |
442ddf59 JK |
15835 | else if (!die_is_declaration (die, cu)) |
15836 | { | |
15837 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
15838 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
15839 | if (!suppress_add) |
15840 | list_to_add = cu->list_in_scope; | |
442ddf59 | 15841 | } |
c906108c SS |
15842 | } |
15843 | break; | |
15844 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
15845 | /* If we are inside a function, mark this as an argument. If |
15846 | not, we might be looking at an argument to an inlined function | |
15847 | when we do not have enough information to show inlined frames; | |
15848 | pretend it's a local variable in that case so that the user can | |
15849 | still see it. */ | |
15850 | if (context_stack_depth > 0 | |
15851 | && context_stack[context_stack_depth - 1].name != NULL) | |
15852 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 15853 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
15854 | if (attr) |
15855 | { | |
e7c27a73 | 15856 | var_decode_location (attr, sym, cu); |
c906108c | 15857 | } |
e142c38c | 15858 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
15859 | if (attr) |
15860 | { | |
e7c27a73 | 15861 | dwarf2_const_value (attr, sym, cu); |
c906108c | 15862 | } |
f346a30d | 15863 | |
e37fd15a | 15864 | list_to_add = cu->list_in_scope; |
c906108c SS |
15865 | break; |
15866 | case DW_TAG_unspecified_parameters: | |
15867 | /* From varargs functions; gdb doesn't seem to have any | |
15868 | interest in this information, so just ignore it for now. | |
15869 | (FIXME?) */ | |
15870 | break; | |
34eaf542 TT |
15871 | case DW_TAG_template_type_param: |
15872 | suppress_add = 1; | |
15873 | /* Fall through. */ | |
c906108c | 15874 | case DW_TAG_class_type: |
680b30c7 | 15875 | case DW_TAG_interface_type: |
c906108c SS |
15876 | case DW_TAG_structure_type: |
15877 | case DW_TAG_union_type: | |
72019c9c | 15878 | case DW_TAG_set_type: |
c906108c SS |
15879 | case DW_TAG_enumeration_type: |
15880 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 15881 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 15882 | |
63d06c5c | 15883 | { |
987504bb | 15884 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
15885 | really ever be static objects: otherwise, if you try |
15886 | to, say, break of a class's method and you're in a file | |
15887 | which doesn't mention that class, it won't work unless | |
15888 | the check for all static symbols in lookup_symbol_aux | |
15889 | saves you. See the OtherFileClass tests in | |
15890 | gdb.c++/namespace.exp. */ | |
15891 | ||
e37fd15a | 15892 | if (!suppress_add) |
34eaf542 | 15893 | { |
34eaf542 TT |
15894 | list_to_add = (cu->list_in_scope == &file_symbols |
15895 | && (cu->language == language_cplus | |
15896 | || cu->language == language_java) | |
15897 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 15898 | |
64382290 TT |
15899 | /* The semantics of C++ state that "struct foo { |
15900 | ... }" also defines a typedef for "foo". A Java | |
15901 | class declaration also defines a typedef for the | |
15902 | class. */ | |
15903 | if (cu->language == language_cplus | |
15904 | || cu->language == language_java | |
15905 | || cu->language == language_ada) | |
15906 | { | |
15907 | /* The symbol's name is already allocated along | |
15908 | with this objfile, so we don't need to | |
15909 | duplicate it for the type. */ | |
15910 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
15911 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
15912 | } | |
63d06c5c DC |
15913 | } |
15914 | } | |
c906108c SS |
15915 | break; |
15916 | case DW_TAG_typedef: | |
63d06c5c DC |
15917 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
15918 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; | |
e37fd15a | 15919 | list_to_add = cu->list_in_scope; |
63d06c5c | 15920 | break; |
c906108c | 15921 | case DW_TAG_base_type: |
a02abb62 | 15922 | case DW_TAG_subrange_type: |
c906108c | 15923 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
176620f1 | 15924 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 15925 | list_to_add = cu->list_in_scope; |
c906108c SS |
15926 | break; |
15927 | case DW_TAG_enumerator: | |
e142c38c | 15928 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
15929 | if (attr) |
15930 | { | |
e7c27a73 | 15931 | dwarf2_const_value (attr, sym, cu); |
c906108c | 15932 | } |
63d06c5c DC |
15933 | { |
15934 | /* NOTE: carlton/2003-11-10: See comment above in the | |
15935 | DW_TAG_class_type, etc. block. */ | |
15936 | ||
e142c38c | 15937 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
15938 | && (cu->language == language_cplus |
15939 | || cu->language == language_java) | |
e142c38c | 15940 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 15941 | } |
c906108c | 15942 | break; |
5c4e30ca DC |
15943 | case DW_TAG_namespace: |
15944 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
e37fd15a | 15945 | list_to_add = &global_symbols; |
5c4e30ca | 15946 | break; |
4357ac6c TT |
15947 | case DW_TAG_common_block: |
15948 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
15949 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; | |
15950 | add_symbol_to_list (sym, cu->list_in_scope); | |
15951 | break; | |
c906108c SS |
15952 | default: |
15953 | /* Not a tag we recognize. Hopefully we aren't processing | |
15954 | trash data, but since we must specifically ignore things | |
15955 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 15956 | this point. */ |
e2e0b3e5 | 15957 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 15958 | dwarf_tag_name (die->tag)); |
c906108c SS |
15959 | break; |
15960 | } | |
df8a16a1 | 15961 | |
e37fd15a SW |
15962 | if (suppress_add) |
15963 | { | |
15964 | sym->hash_next = objfile->template_symbols; | |
15965 | objfile->template_symbols = sym; | |
15966 | list_to_add = NULL; | |
15967 | } | |
15968 | ||
15969 | if (list_to_add != NULL) | |
15970 | add_symbol_to_list (sym, list_to_add); | |
15971 | ||
df8a16a1 DJ |
15972 | /* For the benefit of old versions of GCC, check for anonymous |
15973 | namespaces based on the demangled name. */ | |
15974 | if (!processing_has_namespace_info | |
94af9270 | 15975 | && cu->language == language_cplus) |
a10964d1 | 15976 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
15977 | } |
15978 | return (sym); | |
15979 | } | |
15980 | ||
34eaf542 TT |
15981 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
15982 | ||
15983 | static struct symbol * | |
15984 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
15985 | { | |
15986 | return new_symbol_full (die, type, cu, NULL); | |
15987 | } | |
15988 | ||
98bfdba5 PA |
15989 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
15990 | zero-extend it as appropriate for the symbol's type. The DWARF | |
15991 | standard (v4) is not entirely clear about the meaning of using | |
15992 | DW_FORM_dataN for a constant with a signed type, where the type is | |
15993 | wider than the data. The conclusion of a discussion on the DWARF | |
15994 | list was that this is unspecified. We choose to always zero-extend | |
15995 | because that is the interpretation long in use by GCC. */ | |
c906108c | 15996 | |
98bfdba5 PA |
15997 | static gdb_byte * |
15998 | dwarf2_const_value_data (struct attribute *attr, struct type *type, | |
15999 | const char *name, struct obstack *obstack, | |
12df843f | 16000 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 16001 | { |
e7c27a73 | 16002 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
16003 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
16004 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
16005 | LONGEST l = DW_UNSND (attr); |
16006 | ||
16007 | if (bits < sizeof (*value) * 8) | |
16008 | { | |
16009 | l &= ((LONGEST) 1 << bits) - 1; | |
16010 | *value = l; | |
16011 | } | |
16012 | else if (bits == sizeof (*value) * 8) | |
16013 | *value = l; | |
16014 | else | |
16015 | { | |
16016 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
16017 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
16018 | return bytes; | |
16019 | } | |
16020 | ||
16021 | return NULL; | |
16022 | } | |
16023 | ||
16024 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
16025 | the value does not fit in *VALUE, set *BYTES - either already | |
16026 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
16027 | or, set *BATON, if we translated the constant to a location | |
16028 | expression. */ | |
16029 | ||
16030 | static void | |
16031 | dwarf2_const_value_attr (struct attribute *attr, struct type *type, | |
16032 | const char *name, struct obstack *obstack, | |
16033 | struct dwarf2_cu *cu, | |
12df843f | 16034 | LONGEST *value, gdb_byte **bytes, |
98bfdba5 PA |
16035 | struct dwarf2_locexpr_baton **baton) |
16036 | { | |
16037 | struct objfile *objfile = cu->objfile; | |
16038 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 16039 | struct dwarf_block *blk; |
98bfdba5 PA |
16040 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
16041 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
16042 | ||
16043 | *value = 0; | |
16044 | *bytes = NULL; | |
16045 | *baton = NULL; | |
c906108c SS |
16046 | |
16047 | switch (attr->form) | |
16048 | { | |
16049 | case DW_FORM_addr: | |
3019eac3 | 16050 | case DW_FORM_GNU_addr_index: |
ac56253d | 16051 | { |
ac56253d TT |
16052 | gdb_byte *data; |
16053 | ||
98bfdba5 PA |
16054 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
16055 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 16056 | cu_header->addr_size, |
98bfdba5 | 16057 | TYPE_LENGTH (type)); |
ac56253d TT |
16058 | /* Symbols of this form are reasonably rare, so we just |
16059 | piggyback on the existing location code rather than writing | |
16060 | a new implementation of symbol_computed_ops. */ | |
98bfdba5 PA |
16061 | *baton = obstack_alloc (&objfile->objfile_obstack, |
16062 | sizeof (struct dwarf2_locexpr_baton)); | |
16063 | (*baton)->per_cu = cu->per_cu; | |
16064 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 16065 | |
98bfdba5 PA |
16066 | (*baton)->size = 2 + cu_header->addr_size; |
16067 | data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size); | |
16068 | (*baton)->data = data; | |
ac56253d TT |
16069 | |
16070 | data[0] = DW_OP_addr; | |
16071 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
16072 | byte_order, DW_ADDR (attr)); | |
16073 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 16074 | } |
c906108c | 16075 | break; |
4ac36638 | 16076 | case DW_FORM_string: |
93b5768b | 16077 | case DW_FORM_strp: |
3019eac3 | 16078 | case DW_FORM_GNU_str_index: |
36586728 | 16079 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
16080 | /* DW_STRING is already allocated on the objfile obstack, point |
16081 | directly to it. */ | |
16082 | *bytes = (gdb_byte *) DW_STRING (attr); | |
93b5768b | 16083 | break; |
c906108c SS |
16084 | case DW_FORM_block1: |
16085 | case DW_FORM_block2: | |
16086 | case DW_FORM_block4: | |
16087 | case DW_FORM_block: | |
2dc7f7b3 | 16088 | case DW_FORM_exprloc: |
c906108c | 16089 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
16090 | if (TYPE_LENGTH (type) != blk->size) |
16091 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
16092 | TYPE_LENGTH (type)); | |
16093 | *bytes = blk->data; | |
c906108c | 16094 | break; |
2df3850c JM |
16095 | |
16096 | /* The DW_AT_const_value attributes are supposed to carry the | |
16097 | symbol's value "represented as it would be on the target | |
16098 | architecture." By the time we get here, it's already been | |
16099 | converted to host endianness, so we just need to sign- or | |
16100 | zero-extend it as appropriate. */ | |
16101 | case DW_FORM_data1: | |
3e43a32a MS |
16102 | *bytes = dwarf2_const_value_data (attr, type, name, |
16103 | obstack, cu, value, 8); | |
2df3850c | 16104 | break; |
c906108c | 16105 | case DW_FORM_data2: |
3e43a32a MS |
16106 | *bytes = dwarf2_const_value_data (attr, type, name, |
16107 | obstack, cu, value, 16); | |
2df3850c | 16108 | break; |
c906108c | 16109 | case DW_FORM_data4: |
3e43a32a MS |
16110 | *bytes = dwarf2_const_value_data (attr, type, name, |
16111 | obstack, cu, value, 32); | |
2df3850c | 16112 | break; |
c906108c | 16113 | case DW_FORM_data8: |
3e43a32a MS |
16114 | *bytes = dwarf2_const_value_data (attr, type, name, |
16115 | obstack, cu, value, 64); | |
2df3850c JM |
16116 | break; |
16117 | ||
c906108c | 16118 | case DW_FORM_sdata: |
98bfdba5 | 16119 | *value = DW_SND (attr); |
2df3850c JM |
16120 | break; |
16121 | ||
c906108c | 16122 | case DW_FORM_udata: |
98bfdba5 | 16123 | *value = DW_UNSND (attr); |
c906108c | 16124 | break; |
2df3850c | 16125 | |
c906108c | 16126 | default: |
4d3c2250 | 16127 | complaint (&symfile_complaints, |
e2e0b3e5 | 16128 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 16129 | dwarf_form_name (attr->form)); |
98bfdba5 | 16130 | *value = 0; |
c906108c SS |
16131 | break; |
16132 | } | |
16133 | } | |
16134 | ||
2df3850c | 16135 | |
98bfdba5 PA |
16136 | /* Copy constant value from an attribute to a symbol. */ |
16137 | ||
2df3850c | 16138 | static void |
98bfdba5 PA |
16139 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
16140 | struct dwarf2_cu *cu) | |
2df3850c | 16141 | { |
98bfdba5 PA |
16142 | struct objfile *objfile = cu->objfile; |
16143 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 16144 | LONGEST value; |
98bfdba5 PA |
16145 | gdb_byte *bytes; |
16146 | struct dwarf2_locexpr_baton *baton; | |
2df3850c | 16147 | |
98bfdba5 PA |
16148 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
16149 | SYMBOL_PRINT_NAME (sym), | |
16150 | &objfile->objfile_obstack, cu, | |
16151 | &value, &bytes, &baton); | |
2df3850c | 16152 | |
98bfdba5 PA |
16153 | if (baton != NULL) |
16154 | { | |
16155 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; | |
16156 | SYMBOL_LOCATION_BATON (sym) = baton; | |
16157 | SYMBOL_CLASS (sym) = LOC_COMPUTED; | |
16158 | } | |
16159 | else if (bytes != NULL) | |
16160 | { | |
16161 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
16162 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; | |
16163 | } | |
16164 | else | |
16165 | { | |
16166 | SYMBOL_VALUE (sym) = value; | |
16167 | SYMBOL_CLASS (sym) = LOC_CONST; | |
16168 | } | |
2df3850c JM |
16169 | } |
16170 | ||
c906108c SS |
16171 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
16172 | ||
16173 | static struct type * | |
e7c27a73 | 16174 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16175 | { |
c906108c | 16176 | struct attribute *type_attr; |
c906108c | 16177 | |
e142c38c | 16178 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
16179 | if (!type_attr) |
16180 | { | |
16181 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 16182 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 16183 | } |
348e048f | 16184 | |
673bfd45 | 16185 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16186 | } |
16187 | ||
b4ba55a1 JB |
16188 | /* True iff CU's producer generates GNAT Ada auxiliary information |
16189 | that allows to find parallel types through that information instead | |
16190 | of having to do expensive parallel lookups by type name. */ | |
16191 | ||
16192 | static int | |
16193 | need_gnat_info (struct dwarf2_cu *cu) | |
16194 | { | |
16195 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
16196 | of GNAT produces this auxiliary information, without any indication | |
16197 | that it is produced. Part of enhancing the FSF version of GNAT | |
16198 | to produce that information will be to put in place an indicator | |
16199 | that we can use in order to determine whether the descriptive type | |
16200 | info is available or not. One suggestion that has been made is | |
16201 | to use a new attribute, attached to the CU die. For now, assume | |
16202 | that the descriptive type info is not available. */ | |
16203 | return 0; | |
16204 | } | |
16205 | ||
b4ba55a1 JB |
16206 | /* Return the auxiliary type of the die in question using its |
16207 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
16208 | attribute is not present. */ | |
16209 | ||
16210 | static struct type * | |
16211 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
16212 | { | |
b4ba55a1 | 16213 | struct attribute *type_attr; |
b4ba55a1 JB |
16214 | |
16215 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
16216 | if (!type_attr) | |
16217 | return NULL; | |
16218 | ||
673bfd45 | 16219 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
16220 | } |
16221 | ||
16222 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
16223 | descriptive type accordingly. */ | |
16224 | ||
16225 | static void | |
16226 | set_descriptive_type (struct type *type, struct die_info *die, | |
16227 | struct dwarf2_cu *cu) | |
16228 | { | |
16229 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
16230 | ||
16231 | if (descriptive_type) | |
16232 | { | |
16233 | ALLOCATE_GNAT_AUX_TYPE (type); | |
16234 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
16235 | } | |
16236 | } | |
16237 | ||
c906108c SS |
16238 | /* Return the containing type of the die in question using its |
16239 | DW_AT_containing_type attribute. */ | |
16240 | ||
16241 | static struct type * | |
e7c27a73 | 16242 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16243 | { |
c906108c | 16244 | struct attribute *type_attr; |
c906108c | 16245 | |
e142c38c | 16246 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
16247 | if (!type_attr) |
16248 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
16249 | "[in module %s]"), cu->objfile->name); | |
16250 | ||
673bfd45 | 16251 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16252 | } |
16253 | ||
673bfd45 DE |
16254 | /* Look up the type of DIE in CU using its type attribute ATTR. |
16255 | If there is no type substitute an error marker. */ | |
16256 | ||
c906108c | 16257 | static struct type * |
673bfd45 DE |
16258 | lookup_die_type (struct die_info *die, struct attribute *attr, |
16259 | struct dwarf2_cu *cu) | |
c906108c | 16260 | { |
bb5ed363 | 16261 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
16262 | struct type *this_type; |
16263 | ||
673bfd45 DE |
16264 | /* First see if we have it cached. */ |
16265 | ||
36586728 TT |
16266 | if (attr->form == DW_FORM_GNU_ref_alt) |
16267 | { | |
16268 | struct dwarf2_per_cu_data *per_cu; | |
16269 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
16270 | ||
16271 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
16272 | this_type = get_die_type_at_offset (offset, per_cu); | |
16273 | } | |
16274 | else if (is_ref_attr (attr)) | |
673bfd45 | 16275 | { |
b64f50a1 | 16276 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
16277 | |
16278 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
16279 | } | |
55f1336d | 16280 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 DE |
16281 | { |
16282 | struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr); | |
673bfd45 DE |
16283 | |
16284 | /* sig_type will be NULL if the signatured type is missing from | |
16285 | the debug info. */ | |
16286 | if (sig_type == NULL) | |
16287 | error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE " | |
16288 | "at 0x%x [in module %s]"), | |
b64f50a1 | 16289 | die->offset.sect_off, objfile->name); |
673bfd45 | 16290 | |
3019eac3 DE |
16291 | gdb_assert (sig_type->per_cu.is_debug_types); |
16292 | /* If we haven't filled in type_offset_in_section yet, then we | |
16293 | haven't read the type in yet. */ | |
16294 | this_type = NULL; | |
16295 | if (sig_type->type_offset_in_section.sect_off != 0) | |
16296 | { | |
16297 | this_type = | |
16298 | get_die_type_at_offset (sig_type->type_offset_in_section, | |
16299 | &sig_type->per_cu); | |
16300 | } | |
673bfd45 DE |
16301 | } |
16302 | else | |
16303 | { | |
16304 | dump_die_for_error (die); | |
16305 | error (_("Dwarf Error: Bad type attribute %s [in module %s]"), | |
bb5ed363 | 16306 | dwarf_attr_name (attr->name), objfile->name); |
673bfd45 DE |
16307 | } |
16308 | ||
16309 | /* If not cached we need to read it in. */ | |
16310 | ||
16311 | if (this_type == NULL) | |
16312 | { | |
16313 | struct die_info *type_die; | |
16314 | struct dwarf2_cu *type_cu = cu; | |
16315 | ||
16316 | type_die = follow_die_ref_or_sig (die, attr, &type_cu); | |
3019eac3 DE |
16317 | /* If we found the type now, it's probably because the type came |
16318 | from an inter-CU reference and the type's CU got expanded before | |
16319 | ours. */ | |
16320 | this_type = get_die_type (type_die, type_cu); | |
16321 | if (this_type == NULL) | |
16322 | this_type = read_type_die_1 (type_die, type_cu); | |
673bfd45 DE |
16323 | } |
16324 | ||
16325 | /* If we still don't have a type use an error marker. */ | |
16326 | ||
16327 | if (this_type == NULL) | |
c906108c | 16328 | { |
b00fdb78 TT |
16329 | char *message, *saved; |
16330 | ||
16331 | /* read_type_die already issued a complaint. */ | |
16332 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
bb5ed363 | 16333 | objfile->name, |
b64f50a1 JK |
16334 | cu->header.offset.sect_off, |
16335 | die->offset.sect_off); | |
bb5ed363 | 16336 | saved = obstack_copy0 (&objfile->objfile_obstack, |
b00fdb78 TT |
16337 | message, strlen (message)); |
16338 | xfree (message); | |
16339 | ||
bb5ed363 | 16340 | this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); |
c906108c | 16341 | } |
673bfd45 | 16342 | |
f792889a | 16343 | return this_type; |
c906108c SS |
16344 | } |
16345 | ||
673bfd45 DE |
16346 | /* Return the type in DIE, CU. |
16347 | Returns NULL for invalid types. | |
16348 | ||
16349 | This first does a lookup in the appropriate type_hash table, | |
16350 | and only reads the die in if necessary. | |
16351 | ||
16352 | NOTE: This can be called when reading in partial or full symbols. */ | |
16353 | ||
f792889a | 16354 | static struct type * |
e7c27a73 | 16355 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16356 | { |
f792889a DJ |
16357 | struct type *this_type; |
16358 | ||
16359 | this_type = get_die_type (die, cu); | |
16360 | if (this_type) | |
16361 | return this_type; | |
16362 | ||
673bfd45 DE |
16363 | return read_type_die_1 (die, cu); |
16364 | } | |
16365 | ||
16366 | /* Read the type in DIE, CU. | |
16367 | Returns NULL for invalid types. */ | |
16368 | ||
16369 | static struct type * | |
16370 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
16371 | { | |
16372 | struct type *this_type = NULL; | |
16373 | ||
c906108c SS |
16374 | switch (die->tag) |
16375 | { | |
16376 | case DW_TAG_class_type: | |
680b30c7 | 16377 | case DW_TAG_interface_type: |
c906108c SS |
16378 | case DW_TAG_structure_type: |
16379 | case DW_TAG_union_type: | |
f792889a | 16380 | this_type = read_structure_type (die, cu); |
c906108c SS |
16381 | break; |
16382 | case DW_TAG_enumeration_type: | |
f792889a | 16383 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
16384 | break; |
16385 | case DW_TAG_subprogram: | |
16386 | case DW_TAG_subroutine_type: | |
edb3359d | 16387 | case DW_TAG_inlined_subroutine: |
f792889a | 16388 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
16389 | break; |
16390 | case DW_TAG_array_type: | |
f792889a | 16391 | this_type = read_array_type (die, cu); |
c906108c | 16392 | break; |
72019c9c | 16393 | case DW_TAG_set_type: |
f792889a | 16394 | this_type = read_set_type (die, cu); |
72019c9c | 16395 | break; |
c906108c | 16396 | case DW_TAG_pointer_type: |
f792889a | 16397 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
16398 | break; |
16399 | case DW_TAG_ptr_to_member_type: | |
f792889a | 16400 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
16401 | break; |
16402 | case DW_TAG_reference_type: | |
f792889a | 16403 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
16404 | break; |
16405 | case DW_TAG_const_type: | |
f792889a | 16406 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
16407 | break; |
16408 | case DW_TAG_volatile_type: | |
f792889a | 16409 | this_type = read_tag_volatile_type (die, cu); |
c906108c SS |
16410 | break; |
16411 | case DW_TAG_string_type: | |
f792889a | 16412 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
16413 | break; |
16414 | case DW_TAG_typedef: | |
f792889a | 16415 | this_type = read_typedef (die, cu); |
c906108c | 16416 | break; |
a02abb62 | 16417 | case DW_TAG_subrange_type: |
f792889a | 16418 | this_type = read_subrange_type (die, cu); |
a02abb62 | 16419 | break; |
c906108c | 16420 | case DW_TAG_base_type: |
f792889a | 16421 | this_type = read_base_type (die, cu); |
c906108c | 16422 | break; |
81a17f79 | 16423 | case DW_TAG_unspecified_type: |
f792889a | 16424 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 16425 | break; |
0114d602 DJ |
16426 | case DW_TAG_namespace: |
16427 | this_type = read_namespace_type (die, cu); | |
16428 | break; | |
f55ee35c JK |
16429 | case DW_TAG_module: |
16430 | this_type = read_module_type (die, cu); | |
16431 | break; | |
c906108c | 16432 | default: |
3e43a32a MS |
16433 | complaint (&symfile_complaints, |
16434 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 16435 | dwarf_tag_name (die->tag)); |
c906108c SS |
16436 | break; |
16437 | } | |
63d06c5c | 16438 | |
f792889a | 16439 | return this_type; |
63d06c5c DC |
16440 | } |
16441 | ||
abc72ce4 DE |
16442 | /* See if we can figure out if the class lives in a namespace. We do |
16443 | this by looking for a member function; its demangled name will | |
16444 | contain namespace info, if there is any. | |
16445 | Return the computed name or NULL. | |
16446 | Space for the result is allocated on the objfile's obstack. | |
16447 | This is the full-die version of guess_partial_die_structure_name. | |
16448 | In this case we know DIE has no useful parent. */ | |
16449 | ||
16450 | static char * | |
16451 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
16452 | { | |
16453 | struct die_info *spec_die; | |
16454 | struct dwarf2_cu *spec_cu; | |
16455 | struct die_info *child; | |
16456 | ||
16457 | spec_cu = cu; | |
16458 | spec_die = die_specification (die, &spec_cu); | |
16459 | if (spec_die != NULL) | |
16460 | { | |
16461 | die = spec_die; | |
16462 | cu = spec_cu; | |
16463 | } | |
16464 | ||
16465 | for (child = die->child; | |
16466 | child != NULL; | |
16467 | child = child->sibling) | |
16468 | { | |
16469 | if (child->tag == DW_TAG_subprogram) | |
16470 | { | |
16471 | struct attribute *attr; | |
16472 | ||
16473 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
16474 | if (attr == NULL) | |
16475 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
16476 | if (attr != NULL) | |
16477 | { | |
16478 | char *actual_name | |
16479 | = language_class_name_from_physname (cu->language_defn, | |
16480 | DW_STRING (attr)); | |
16481 | char *name = NULL; | |
16482 | ||
16483 | if (actual_name != NULL) | |
16484 | { | |
16485 | char *die_name = dwarf2_name (die, cu); | |
16486 | ||
16487 | if (die_name != NULL | |
16488 | && strcmp (die_name, actual_name) != 0) | |
16489 | { | |
16490 | /* Strip off the class name from the full name. | |
16491 | We want the prefix. */ | |
16492 | int die_name_len = strlen (die_name); | |
16493 | int actual_name_len = strlen (actual_name); | |
16494 | ||
16495 | /* Test for '::' as a sanity check. */ | |
16496 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
16497 | && actual_name[actual_name_len |
16498 | - die_name_len - 1] == ':') | |
abc72ce4 DE |
16499 | name = |
16500 | obsavestring (actual_name, | |
16501 | actual_name_len - die_name_len - 2, | |
16502 | &cu->objfile->objfile_obstack); | |
16503 | } | |
16504 | } | |
16505 | xfree (actual_name); | |
16506 | return name; | |
16507 | } | |
16508 | } | |
16509 | } | |
16510 | ||
16511 | return NULL; | |
16512 | } | |
16513 | ||
96408a79 SA |
16514 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
16515 | prefix part in such case. See | |
16516 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16517 | ||
16518 | static char * | |
16519 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
16520 | { | |
16521 | struct attribute *attr; | |
16522 | char *base; | |
16523 | ||
16524 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
16525 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
16526 | return NULL; | |
16527 | ||
16528 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
16529 | if (attr != NULL && DW_STRING (attr) != NULL) | |
16530 | return NULL; | |
16531 | ||
16532 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
16533 | if (attr == NULL) | |
16534 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
16535 | if (attr == NULL || DW_STRING (attr) == NULL) | |
16536 | return NULL; | |
16537 | ||
16538 | /* dwarf2_name had to be already called. */ | |
16539 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
16540 | ||
16541 | /* Strip the base name, keep any leading namespaces/classes. */ | |
16542 | base = strrchr (DW_STRING (attr), ':'); | |
16543 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
16544 | return ""; | |
16545 | ||
16546 | return obsavestring (DW_STRING (attr), &base[-1] - DW_STRING (attr), | |
16547 | &cu->objfile->objfile_obstack); | |
16548 | } | |
16549 | ||
fdde2d81 | 16550 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 16551 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 16552 | |
0114d602 DJ |
16553 | For example, if we're within the method foo() in the following |
16554 | code: | |
16555 | ||
16556 | namespace N { | |
16557 | class C { | |
16558 | void foo () { | |
16559 | } | |
16560 | }; | |
16561 | } | |
16562 | ||
16563 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 16564 | |
0d5cff50 | 16565 | static const char * |
e142c38c | 16566 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 16567 | { |
0114d602 DJ |
16568 | struct die_info *parent, *spec_die; |
16569 | struct dwarf2_cu *spec_cu; | |
16570 | struct type *parent_type; | |
96408a79 | 16571 | char *retval; |
63d06c5c | 16572 | |
f55ee35c JK |
16573 | if (cu->language != language_cplus && cu->language != language_java |
16574 | && cu->language != language_fortran) | |
0114d602 DJ |
16575 | return ""; |
16576 | ||
96408a79 SA |
16577 | retval = anonymous_struct_prefix (die, cu); |
16578 | if (retval) | |
16579 | return retval; | |
16580 | ||
0114d602 DJ |
16581 | /* We have to be careful in the presence of DW_AT_specification. |
16582 | For example, with GCC 3.4, given the code | |
16583 | ||
16584 | namespace N { | |
16585 | void foo() { | |
16586 | // Definition of N::foo. | |
16587 | } | |
16588 | } | |
16589 | ||
16590 | then we'll have a tree of DIEs like this: | |
16591 | ||
16592 | 1: DW_TAG_compile_unit | |
16593 | 2: DW_TAG_namespace // N | |
16594 | 3: DW_TAG_subprogram // declaration of N::foo | |
16595 | 4: DW_TAG_subprogram // definition of N::foo | |
16596 | DW_AT_specification // refers to die #3 | |
16597 | ||
16598 | Thus, when processing die #4, we have to pretend that we're in | |
16599 | the context of its DW_AT_specification, namely the contex of die | |
16600 | #3. */ | |
16601 | spec_cu = cu; | |
16602 | spec_die = die_specification (die, &spec_cu); | |
16603 | if (spec_die == NULL) | |
16604 | parent = die->parent; | |
16605 | else | |
63d06c5c | 16606 | { |
0114d602 DJ |
16607 | parent = spec_die->parent; |
16608 | cu = spec_cu; | |
63d06c5c | 16609 | } |
0114d602 DJ |
16610 | |
16611 | if (parent == NULL) | |
16612 | return ""; | |
98bfdba5 PA |
16613 | else if (parent->building_fullname) |
16614 | { | |
16615 | const char *name; | |
16616 | const char *parent_name; | |
16617 | ||
16618 | /* It has been seen on RealView 2.2 built binaries, | |
16619 | DW_TAG_template_type_param types actually _defined_ as | |
16620 | children of the parent class: | |
16621 | ||
16622 | enum E {}; | |
16623 | template class <class Enum> Class{}; | |
16624 | Class<enum E> class_e; | |
16625 | ||
16626 | 1: DW_TAG_class_type (Class) | |
16627 | 2: DW_TAG_enumeration_type (E) | |
16628 | 3: DW_TAG_enumerator (enum1:0) | |
16629 | 3: DW_TAG_enumerator (enum2:1) | |
16630 | ... | |
16631 | 2: DW_TAG_template_type_param | |
16632 | DW_AT_type DW_FORM_ref_udata (E) | |
16633 | ||
16634 | Besides being broken debug info, it can put GDB into an | |
16635 | infinite loop. Consider: | |
16636 | ||
16637 | When we're building the full name for Class<E>, we'll start | |
16638 | at Class, and go look over its template type parameters, | |
16639 | finding E. We'll then try to build the full name of E, and | |
16640 | reach here. We're now trying to build the full name of E, | |
16641 | and look over the parent DIE for containing scope. In the | |
16642 | broken case, if we followed the parent DIE of E, we'd again | |
16643 | find Class, and once again go look at its template type | |
16644 | arguments, etc., etc. Simply don't consider such parent die | |
16645 | as source-level parent of this die (it can't be, the language | |
16646 | doesn't allow it), and break the loop here. */ | |
16647 | name = dwarf2_name (die, cu); | |
16648 | parent_name = dwarf2_name (parent, cu); | |
16649 | complaint (&symfile_complaints, | |
16650 | _("template param type '%s' defined within parent '%s'"), | |
16651 | name ? name : "<unknown>", | |
16652 | parent_name ? parent_name : "<unknown>"); | |
16653 | return ""; | |
16654 | } | |
63d06c5c | 16655 | else |
0114d602 DJ |
16656 | switch (parent->tag) |
16657 | { | |
63d06c5c | 16658 | case DW_TAG_namespace: |
0114d602 | 16659 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
16660 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
16661 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
16662 | Work around this problem here. */ | |
16663 | if (cu->language == language_cplus | |
16664 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
16665 | return ""; | |
0114d602 DJ |
16666 | /* We give a name to even anonymous namespaces. */ |
16667 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 16668 | case DW_TAG_class_type: |
680b30c7 | 16669 | case DW_TAG_interface_type: |
63d06c5c | 16670 | case DW_TAG_structure_type: |
0114d602 | 16671 | case DW_TAG_union_type: |
f55ee35c | 16672 | case DW_TAG_module: |
0114d602 DJ |
16673 | parent_type = read_type_die (parent, cu); |
16674 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
16675 | return TYPE_TAG_NAME (parent_type); | |
16676 | else | |
16677 | /* An anonymous structure is only allowed non-static data | |
16678 | members; no typedefs, no member functions, et cetera. | |
16679 | So it does not need a prefix. */ | |
16680 | return ""; | |
abc72ce4 | 16681 | case DW_TAG_compile_unit: |
95554aad | 16682 | case DW_TAG_partial_unit: |
abc72ce4 DE |
16683 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
16684 | if (cu->language == language_cplus | |
8b70b953 | 16685 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16686 | && die->child != NULL |
16687 | && (die->tag == DW_TAG_class_type | |
16688 | || die->tag == DW_TAG_structure_type | |
16689 | || die->tag == DW_TAG_union_type)) | |
16690 | { | |
16691 | char *name = guess_full_die_structure_name (die, cu); | |
16692 | if (name != NULL) | |
16693 | return name; | |
16694 | } | |
16695 | return ""; | |
63d06c5c | 16696 | default: |
8176b9b8 | 16697 | return determine_prefix (parent, cu); |
63d06c5c | 16698 | } |
63d06c5c DC |
16699 | } |
16700 | ||
3e43a32a MS |
16701 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
16702 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
16703 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
16704 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
16705 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 16706 | |
f55ee35c | 16707 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
16708 | |
16709 | static char * | |
f55ee35c JK |
16710 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
16711 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 16712 | { |
f55ee35c | 16713 | const char *lead = ""; |
5c315b68 | 16714 | const char *sep; |
63d06c5c | 16715 | |
3e43a32a MS |
16716 | if (suffix == NULL || suffix[0] == '\0' |
16717 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
16718 | sep = ""; |
16719 | else if (cu->language == language_java) | |
16720 | sep = "."; | |
f55ee35c JK |
16721 | else if (cu->language == language_fortran && physname) |
16722 | { | |
16723 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
16724 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
16725 | ||
16726 | lead = "__"; | |
16727 | sep = "_MOD_"; | |
16728 | } | |
987504bb JJ |
16729 | else |
16730 | sep = "::"; | |
63d06c5c | 16731 | |
6dd47d34 DE |
16732 | if (prefix == NULL) |
16733 | prefix = ""; | |
16734 | if (suffix == NULL) | |
16735 | suffix = ""; | |
16736 | ||
987504bb JJ |
16737 | if (obs == NULL) |
16738 | { | |
3e43a32a MS |
16739 | char *retval |
16740 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 16741 | |
f55ee35c JK |
16742 | strcpy (retval, lead); |
16743 | strcat (retval, prefix); | |
6dd47d34 DE |
16744 | strcat (retval, sep); |
16745 | strcat (retval, suffix); | |
63d06c5c DC |
16746 | return retval; |
16747 | } | |
987504bb JJ |
16748 | else |
16749 | { | |
16750 | /* We have an obstack. */ | |
f55ee35c | 16751 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 16752 | } |
63d06c5c DC |
16753 | } |
16754 | ||
c906108c SS |
16755 | /* Return sibling of die, NULL if no sibling. */ |
16756 | ||
f9aca02d | 16757 | static struct die_info * |
fba45db2 | 16758 | sibling_die (struct die_info *die) |
c906108c | 16759 | { |
639d11d3 | 16760 | return die->sibling; |
c906108c SS |
16761 | } |
16762 | ||
71c25dea TT |
16763 | /* Get name of a die, return NULL if not found. */ |
16764 | ||
16765 | static char * | |
16766 | dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu, | |
16767 | struct obstack *obstack) | |
16768 | { | |
16769 | if (name && cu->language == language_cplus) | |
16770 | { | |
16771 | char *canon_name = cp_canonicalize_string (name); | |
16772 | ||
16773 | if (canon_name != NULL) | |
16774 | { | |
16775 | if (strcmp (canon_name, name) != 0) | |
16776 | name = obsavestring (canon_name, strlen (canon_name), | |
16777 | obstack); | |
16778 | xfree (canon_name); | |
16779 | } | |
16780 | } | |
16781 | ||
16782 | return name; | |
c906108c SS |
16783 | } |
16784 | ||
9219021c DC |
16785 | /* Get name of a die, return NULL if not found. */ |
16786 | ||
16787 | static char * | |
e142c38c | 16788 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
16789 | { |
16790 | struct attribute *attr; | |
16791 | ||
e142c38c | 16792 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
16793 | if ((!attr || !DW_STRING (attr)) |
16794 | && die->tag != DW_TAG_class_type | |
16795 | && die->tag != DW_TAG_interface_type | |
16796 | && die->tag != DW_TAG_structure_type | |
16797 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
16798 | return NULL; |
16799 | ||
16800 | switch (die->tag) | |
16801 | { | |
16802 | case DW_TAG_compile_unit: | |
95554aad | 16803 | case DW_TAG_partial_unit: |
71c25dea TT |
16804 | /* Compilation units have a DW_AT_name that is a filename, not |
16805 | a source language identifier. */ | |
16806 | case DW_TAG_enumeration_type: | |
16807 | case DW_TAG_enumerator: | |
16808 | /* These tags always have simple identifiers already; no need | |
16809 | to canonicalize them. */ | |
16810 | return DW_STRING (attr); | |
907af001 | 16811 | |
418835cc KS |
16812 | case DW_TAG_subprogram: |
16813 | /* Java constructors will all be named "<init>", so return | |
16814 | the class name when we see this special case. */ | |
16815 | if (cu->language == language_java | |
16816 | && DW_STRING (attr) != NULL | |
16817 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
16818 | { | |
16819 | struct dwarf2_cu *spec_cu = cu; | |
16820 | struct die_info *spec_die; | |
16821 | ||
16822 | /* GCJ will output '<init>' for Java constructor names. | |
16823 | For this special case, return the name of the parent class. */ | |
16824 | ||
16825 | /* GCJ may output suprogram DIEs with AT_specification set. | |
16826 | If so, use the name of the specified DIE. */ | |
16827 | spec_die = die_specification (die, &spec_cu); | |
16828 | if (spec_die != NULL) | |
16829 | return dwarf2_name (spec_die, spec_cu); | |
16830 | ||
16831 | do | |
16832 | { | |
16833 | die = die->parent; | |
16834 | if (die->tag == DW_TAG_class_type) | |
16835 | return dwarf2_name (die, cu); | |
16836 | } | |
95554aad TT |
16837 | while (die->tag != DW_TAG_compile_unit |
16838 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 16839 | } |
907af001 UW |
16840 | break; |
16841 | ||
16842 | case DW_TAG_class_type: | |
16843 | case DW_TAG_interface_type: | |
16844 | case DW_TAG_structure_type: | |
16845 | case DW_TAG_union_type: | |
16846 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
16847 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
16848 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
16849 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
16850 | if (attr && DW_STRING (attr) |
16851 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
16852 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 16853 | return NULL; |
53832f31 TT |
16854 | |
16855 | /* GCC might emit a nameless typedef that has a linkage name. See | |
16856 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16857 | if (!attr || DW_STRING (attr) == NULL) | |
16858 | { | |
df5c6c50 | 16859 | char *demangled = NULL; |
53832f31 TT |
16860 | |
16861 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
16862 | if (attr == NULL) | |
16863 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
16864 | ||
16865 | if (attr == NULL || DW_STRING (attr) == NULL) | |
16866 | return NULL; | |
16867 | ||
df5c6c50 JK |
16868 | /* Avoid demangling DW_STRING (attr) the second time on a second |
16869 | call for the same DIE. */ | |
16870 | if (!DW_STRING_IS_CANONICAL (attr)) | |
16871 | demangled = cplus_demangle (DW_STRING (attr), DMGL_TYPES); | |
53832f31 TT |
16872 | |
16873 | if (demangled) | |
16874 | { | |
96408a79 SA |
16875 | char *base; |
16876 | ||
53832f31 | 16877 | /* FIXME: we already did this for the partial symbol... */ |
96408a79 SA |
16878 | DW_STRING (attr) = obsavestring (demangled, strlen (demangled), |
16879 | &cu->objfile->objfile_obstack); | |
53832f31 TT |
16880 | DW_STRING_IS_CANONICAL (attr) = 1; |
16881 | xfree (demangled); | |
96408a79 SA |
16882 | |
16883 | /* Strip any leading namespaces/classes, keep only the base name. | |
16884 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16885 | base = strrchr (DW_STRING (attr), ':'); | |
16886 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
16887 | return &base[1]; | |
16888 | else | |
16889 | return DW_STRING (attr); | |
53832f31 TT |
16890 | } |
16891 | } | |
907af001 UW |
16892 | break; |
16893 | ||
71c25dea | 16894 | default: |
907af001 UW |
16895 | break; |
16896 | } | |
16897 | ||
16898 | if (!DW_STRING_IS_CANONICAL (attr)) | |
16899 | { | |
16900 | DW_STRING (attr) | |
16901 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
16902 | &cu->objfile->objfile_obstack); | |
16903 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 16904 | } |
907af001 | 16905 | return DW_STRING (attr); |
9219021c DC |
16906 | } |
16907 | ||
16908 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
16909 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
16910 | containing the return value on output. */ | |
9219021c DC |
16911 | |
16912 | static struct die_info * | |
f2f0e013 | 16913 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
16914 | { |
16915 | struct attribute *attr; | |
9219021c | 16916 | |
f2f0e013 | 16917 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
16918 | if (attr == NULL) |
16919 | return NULL; | |
16920 | ||
f2f0e013 | 16921 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
16922 | } |
16923 | ||
c906108c SS |
16924 | /* Convert a DIE tag into its string name. */ |
16925 | ||
f39c6ffd | 16926 | static const char * |
aa1ee363 | 16927 | dwarf_tag_name (unsigned tag) |
c906108c | 16928 | { |
f39c6ffd TT |
16929 | const char *name = get_DW_TAG_name (tag); |
16930 | ||
16931 | if (name == NULL) | |
16932 | return "DW_TAG_<unknown>"; | |
16933 | ||
16934 | return name; | |
c906108c SS |
16935 | } |
16936 | ||
16937 | /* Convert a DWARF attribute code into its string name. */ | |
16938 | ||
f39c6ffd | 16939 | static const char * |
aa1ee363 | 16940 | dwarf_attr_name (unsigned attr) |
c906108c | 16941 | { |
f39c6ffd TT |
16942 | const char *name; |
16943 | ||
c764a876 | 16944 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
16945 | if (attr == DW_AT_MIPS_fde) |
16946 | return "DW_AT_MIPS_fde"; | |
16947 | #else | |
16948 | if (attr == DW_AT_HP_block_index) | |
16949 | return "DW_AT_HP_block_index"; | |
c764a876 | 16950 | #endif |
f39c6ffd TT |
16951 | |
16952 | name = get_DW_AT_name (attr); | |
16953 | ||
16954 | if (name == NULL) | |
16955 | return "DW_AT_<unknown>"; | |
16956 | ||
16957 | return name; | |
c906108c SS |
16958 | } |
16959 | ||
16960 | /* Convert a DWARF value form code into its string name. */ | |
16961 | ||
f39c6ffd | 16962 | static const char * |
aa1ee363 | 16963 | dwarf_form_name (unsigned form) |
c906108c | 16964 | { |
f39c6ffd TT |
16965 | const char *name = get_DW_FORM_name (form); |
16966 | ||
16967 | if (name == NULL) | |
16968 | return "DW_FORM_<unknown>"; | |
16969 | ||
16970 | return name; | |
c906108c SS |
16971 | } |
16972 | ||
16973 | static char * | |
fba45db2 | 16974 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
16975 | { |
16976 | if (mybool) | |
16977 | return "TRUE"; | |
16978 | else | |
16979 | return "FALSE"; | |
16980 | } | |
16981 | ||
16982 | /* Convert a DWARF type code into its string name. */ | |
16983 | ||
f39c6ffd | 16984 | static const char * |
aa1ee363 | 16985 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 16986 | { |
f39c6ffd | 16987 | const char *name = get_DW_ATE_name (enc); |
c906108c | 16988 | |
f39c6ffd TT |
16989 | if (name == NULL) |
16990 | return "DW_ATE_<unknown>"; | |
c906108c | 16991 | |
f39c6ffd | 16992 | return name; |
c906108c | 16993 | } |
c906108c | 16994 | |
f9aca02d | 16995 | static void |
d97bc12b | 16996 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
16997 | { |
16998 | unsigned int i; | |
16999 | ||
d97bc12b DE |
17000 | print_spaces (indent, f); |
17001 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 17002 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
17003 | |
17004 | if (die->parent != NULL) | |
17005 | { | |
17006 | print_spaces (indent, f); | |
17007 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 17008 | die->parent->offset.sect_off); |
d97bc12b DE |
17009 | } |
17010 | ||
17011 | print_spaces (indent, f); | |
17012 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 17013 | dwarf_bool_name (die->child != NULL)); |
c906108c | 17014 | |
d97bc12b DE |
17015 | print_spaces (indent, f); |
17016 | fprintf_unfiltered (f, " attributes:\n"); | |
17017 | ||
c906108c SS |
17018 | for (i = 0; i < die->num_attrs; ++i) |
17019 | { | |
d97bc12b DE |
17020 | print_spaces (indent, f); |
17021 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
17022 | dwarf_attr_name (die->attrs[i].name), |
17023 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 17024 | |
c906108c SS |
17025 | switch (die->attrs[i].form) |
17026 | { | |
c906108c | 17027 | case DW_FORM_addr: |
3019eac3 | 17028 | case DW_FORM_GNU_addr_index: |
d97bc12b | 17029 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 17030 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
17031 | break; |
17032 | case DW_FORM_block2: | |
17033 | case DW_FORM_block4: | |
17034 | case DW_FORM_block: | |
17035 | case DW_FORM_block1: | |
56eb65bd SP |
17036 | fprintf_unfiltered (f, "block: size %s", |
17037 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 17038 | break; |
2dc7f7b3 | 17039 | case DW_FORM_exprloc: |
56eb65bd SP |
17040 | fprintf_unfiltered (f, "expression: size %s", |
17041 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 17042 | break; |
4568ecf9 DE |
17043 | case DW_FORM_ref_addr: |
17044 | fprintf_unfiltered (f, "ref address: "); | |
17045 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17046 | break; | |
36586728 TT |
17047 | case DW_FORM_GNU_ref_alt: |
17048 | fprintf_unfiltered (f, "alt ref address: "); | |
17049 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17050 | break; | |
10b3939b DJ |
17051 | case DW_FORM_ref1: |
17052 | case DW_FORM_ref2: | |
17053 | case DW_FORM_ref4: | |
4568ecf9 DE |
17054 | case DW_FORM_ref8: |
17055 | case DW_FORM_ref_udata: | |
d97bc12b | 17056 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 17057 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 17058 | break; |
c906108c SS |
17059 | case DW_FORM_data1: |
17060 | case DW_FORM_data2: | |
17061 | case DW_FORM_data4: | |
ce5d95e1 | 17062 | case DW_FORM_data8: |
c906108c SS |
17063 | case DW_FORM_udata: |
17064 | case DW_FORM_sdata: | |
43bbcdc2 PH |
17065 | fprintf_unfiltered (f, "constant: %s", |
17066 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 17067 | break; |
2dc7f7b3 TT |
17068 | case DW_FORM_sec_offset: |
17069 | fprintf_unfiltered (f, "section offset: %s", | |
17070 | pulongest (DW_UNSND (&die->attrs[i]))); | |
17071 | break; | |
55f1336d | 17072 | case DW_FORM_ref_sig8: |
348e048f DE |
17073 | if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL) |
17074 | fprintf_unfiltered (f, "signatured type, offset: 0x%x", | |
b64f50a1 | 17075 | DW_SIGNATURED_TYPE (&die->attrs[i])->per_cu.offset.sect_off); |
348e048f DE |
17076 | else |
17077 | fprintf_unfiltered (f, "signatured type, offset: unknown"); | |
17078 | break; | |
c906108c | 17079 | case DW_FORM_string: |
4bdf3d34 | 17080 | case DW_FORM_strp: |
3019eac3 | 17081 | case DW_FORM_GNU_str_index: |
36586728 | 17082 | case DW_FORM_GNU_strp_alt: |
8285870a | 17083 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 17084 | DW_STRING (&die->attrs[i]) |
8285870a JK |
17085 | ? DW_STRING (&die->attrs[i]) : "", |
17086 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
17087 | break; |
17088 | case DW_FORM_flag: | |
17089 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 17090 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 17091 | else |
d97bc12b | 17092 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 17093 | break; |
2dc7f7b3 TT |
17094 | case DW_FORM_flag_present: |
17095 | fprintf_unfiltered (f, "flag: TRUE"); | |
17096 | break; | |
a8329558 | 17097 | case DW_FORM_indirect: |
0963b4bd MS |
17098 | /* The reader will have reduced the indirect form to |
17099 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
17100 | fprintf_unfiltered (f, |
17101 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 17102 | break; |
c906108c | 17103 | default: |
d97bc12b | 17104 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 17105 | die->attrs[i].form); |
d97bc12b | 17106 | break; |
c906108c | 17107 | } |
d97bc12b | 17108 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
17109 | } |
17110 | } | |
17111 | ||
f9aca02d | 17112 | static void |
d97bc12b | 17113 | dump_die_for_error (struct die_info *die) |
c906108c | 17114 | { |
d97bc12b DE |
17115 | dump_die_shallow (gdb_stderr, 0, die); |
17116 | } | |
17117 | ||
17118 | static void | |
17119 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
17120 | { | |
17121 | int indent = level * 4; | |
17122 | ||
17123 | gdb_assert (die != NULL); | |
17124 | ||
17125 | if (level >= max_level) | |
17126 | return; | |
17127 | ||
17128 | dump_die_shallow (f, indent, die); | |
17129 | ||
17130 | if (die->child != NULL) | |
c906108c | 17131 | { |
d97bc12b DE |
17132 | print_spaces (indent, f); |
17133 | fprintf_unfiltered (f, " Children:"); | |
17134 | if (level + 1 < max_level) | |
17135 | { | |
17136 | fprintf_unfiltered (f, "\n"); | |
17137 | dump_die_1 (f, level + 1, max_level, die->child); | |
17138 | } | |
17139 | else | |
17140 | { | |
3e43a32a MS |
17141 | fprintf_unfiltered (f, |
17142 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
17143 | } |
17144 | } | |
17145 | ||
17146 | if (die->sibling != NULL && level > 0) | |
17147 | { | |
17148 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
17149 | } |
17150 | } | |
17151 | ||
d97bc12b DE |
17152 | /* This is called from the pdie macro in gdbinit.in. |
17153 | It's not static so gcc will keep a copy callable from gdb. */ | |
17154 | ||
17155 | void | |
17156 | dump_die (struct die_info *die, int max_level) | |
17157 | { | |
17158 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
17159 | } | |
17160 | ||
f9aca02d | 17161 | static void |
51545339 | 17162 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17163 | { |
51545339 | 17164 | void **slot; |
c906108c | 17165 | |
b64f50a1 JK |
17166 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
17167 | INSERT); | |
51545339 DJ |
17168 | |
17169 | *slot = die; | |
c906108c SS |
17170 | } |
17171 | ||
b64f50a1 JK |
17172 | /* DW_ADDR is always stored already as sect_offset; despite for the forms |
17173 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
17174 | ||
93311388 DE |
17175 | static int |
17176 | is_ref_attr (struct attribute *attr) | |
c906108c | 17177 | { |
c906108c SS |
17178 | switch (attr->form) |
17179 | { | |
17180 | case DW_FORM_ref_addr: | |
c906108c SS |
17181 | case DW_FORM_ref1: |
17182 | case DW_FORM_ref2: | |
17183 | case DW_FORM_ref4: | |
613e1657 | 17184 | case DW_FORM_ref8: |
c906108c | 17185 | case DW_FORM_ref_udata: |
36586728 | 17186 | case DW_FORM_GNU_ref_alt: |
93311388 | 17187 | return 1; |
c906108c | 17188 | default: |
93311388 | 17189 | return 0; |
c906108c | 17190 | } |
93311388 DE |
17191 | } |
17192 | ||
b64f50a1 JK |
17193 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
17194 | required kind. */ | |
17195 | ||
17196 | static sect_offset | |
93311388 DE |
17197 | dwarf2_get_ref_die_offset (struct attribute *attr) |
17198 | { | |
4568ecf9 | 17199 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 17200 | |
93311388 | 17201 | if (is_ref_attr (attr)) |
b64f50a1 | 17202 | return retval; |
93311388 | 17203 | |
b64f50a1 | 17204 | retval.sect_off = 0; |
93311388 DE |
17205 | complaint (&symfile_complaints, |
17206 | _("unsupported die ref attribute form: '%s'"), | |
17207 | dwarf_form_name (attr->form)); | |
b64f50a1 | 17208 | return retval; |
c906108c SS |
17209 | } |
17210 | ||
43bbcdc2 PH |
17211 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
17212 | * the value held by the attribute is not constant. */ | |
a02abb62 | 17213 | |
43bbcdc2 | 17214 | static LONGEST |
a02abb62 JB |
17215 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) |
17216 | { | |
17217 | if (attr->form == DW_FORM_sdata) | |
17218 | return DW_SND (attr); | |
17219 | else if (attr->form == DW_FORM_udata | |
17220 | || attr->form == DW_FORM_data1 | |
17221 | || attr->form == DW_FORM_data2 | |
17222 | || attr->form == DW_FORM_data4 | |
17223 | || attr->form == DW_FORM_data8) | |
17224 | return DW_UNSND (attr); | |
17225 | else | |
17226 | { | |
3e43a32a MS |
17227 | complaint (&symfile_complaints, |
17228 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
17229 | dwarf_form_name (attr->form)); |
17230 | return default_value; | |
17231 | } | |
17232 | } | |
17233 | ||
348e048f DE |
17234 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
17235 | On entry *REF_CU is the CU of SRC_DIE. | |
17236 | On exit *REF_CU is the CU of the result. */ | |
17237 | ||
17238 | static struct die_info * | |
17239 | follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr, | |
17240 | struct dwarf2_cu **ref_cu) | |
17241 | { | |
17242 | struct die_info *die; | |
17243 | ||
17244 | if (is_ref_attr (attr)) | |
17245 | die = follow_die_ref (src_die, attr, ref_cu); | |
55f1336d | 17246 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
17247 | die = follow_die_sig (src_die, attr, ref_cu); |
17248 | else | |
17249 | { | |
17250 | dump_die_for_error (src_die); | |
17251 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
17252 | (*ref_cu)->objfile->name); | |
17253 | } | |
17254 | ||
17255 | return die; | |
03dd20cc DJ |
17256 | } |
17257 | ||
5c631832 | 17258 | /* Follow reference OFFSET. |
673bfd45 DE |
17259 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
17260 | On exit *REF_CU is the CU of the result. | |
17261 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 17262 | |
f9aca02d | 17263 | static struct die_info * |
36586728 TT |
17264 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
17265 | struct dwarf2_cu **ref_cu) | |
c906108c | 17266 | { |
10b3939b | 17267 | struct die_info temp_die; |
f2f0e013 | 17268 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 17269 | |
348e048f DE |
17270 | gdb_assert (cu->per_cu != NULL); |
17271 | ||
98bfdba5 PA |
17272 | target_cu = cu; |
17273 | ||
3019eac3 | 17274 | if (cu->per_cu->is_debug_types) |
348e048f DE |
17275 | { |
17276 | /* .debug_types CUs cannot reference anything outside their CU. | |
17277 | If they need to, they have to reference a signatured type via | |
55f1336d | 17278 | DW_FORM_ref_sig8. */ |
348e048f | 17279 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 17280 | return NULL; |
348e048f | 17281 | } |
36586728 TT |
17282 | else if (offset_in_dwz != cu->per_cu->is_dwz |
17283 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
17284 | { |
17285 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 17286 | |
36586728 TT |
17287 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
17288 | cu->objfile); | |
03dd20cc DJ |
17289 | |
17290 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
17291 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
17292 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 17293 | |
10b3939b DJ |
17294 | target_cu = per_cu->cu; |
17295 | } | |
98bfdba5 PA |
17296 | else if (cu->dies == NULL) |
17297 | { | |
17298 | /* We're loading full DIEs during partial symbol reading. */ | |
17299 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 17300 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 17301 | } |
c906108c | 17302 | |
f2f0e013 | 17303 | *ref_cu = target_cu; |
51545339 | 17304 | temp_die.offset = offset; |
b64f50a1 | 17305 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 17306 | } |
10b3939b | 17307 | |
5c631832 JK |
17308 | /* Follow reference attribute ATTR of SRC_DIE. |
17309 | On entry *REF_CU is the CU of SRC_DIE. | |
17310 | On exit *REF_CU is the CU of the result. */ | |
17311 | ||
17312 | static struct die_info * | |
17313 | follow_die_ref (struct die_info *src_die, struct attribute *attr, | |
17314 | struct dwarf2_cu **ref_cu) | |
17315 | { | |
b64f50a1 | 17316 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
17317 | struct dwarf2_cu *cu = *ref_cu; |
17318 | struct die_info *die; | |
17319 | ||
36586728 TT |
17320 | die = follow_die_offset (offset, |
17321 | (attr->form == DW_FORM_GNU_ref_alt | |
17322 | || cu->per_cu->is_dwz), | |
17323 | ref_cu); | |
5c631832 JK |
17324 | if (!die) |
17325 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
17326 | "at 0x%x [in module %s]"), | |
b64f50a1 | 17327 | offset.sect_off, src_die->offset.sect_off, cu->objfile->name); |
348e048f | 17328 | |
5c631832 JK |
17329 | return die; |
17330 | } | |
17331 | ||
d83e736b JK |
17332 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
17333 | Returned value is intended for DW_OP_call*. Returned | |
17334 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
17335 | |
17336 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
17337 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
17338 | struct dwarf2_per_cu_data *per_cu, | |
17339 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17340 | void *baton) | |
5c631832 | 17341 | { |
918dd910 | 17342 | struct dwarf2_cu *cu; |
5c631832 JK |
17343 | struct die_info *die; |
17344 | struct attribute *attr; | |
17345 | struct dwarf2_locexpr_baton retval; | |
17346 | ||
8cf6f0b1 TT |
17347 | dw2_setup (per_cu->objfile); |
17348 | ||
918dd910 JK |
17349 | if (per_cu->cu == NULL) |
17350 | load_cu (per_cu); | |
17351 | cu = per_cu->cu; | |
17352 | ||
36586728 | 17353 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
17354 | if (!die) |
17355 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
b64f50a1 | 17356 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17357 | |
17358 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
17359 | if (!attr) | |
17360 | { | |
e103e986 JK |
17361 | /* DWARF: "If there is no such attribute, then there is no effect.". |
17362 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 17363 | |
e103e986 | 17364 | retval.data = NULL; |
5c631832 JK |
17365 | retval.size = 0; |
17366 | } | |
8cf6f0b1 TT |
17367 | else if (attr_form_is_section_offset (attr)) |
17368 | { | |
17369 | struct dwarf2_loclist_baton loclist_baton; | |
17370 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
17371 | size_t size; | |
17372 | ||
17373 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
17374 | ||
17375 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
17376 | &size, pc); | |
17377 | retval.size = size; | |
17378 | } | |
5c631832 JK |
17379 | else |
17380 | { | |
17381 | if (!attr_form_is_block (attr)) | |
17382 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
17383 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
b64f50a1 | 17384 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17385 | |
17386 | retval.data = DW_BLOCK (attr)->data; | |
17387 | retval.size = DW_BLOCK (attr)->size; | |
17388 | } | |
17389 | retval.per_cu = cu->per_cu; | |
918dd910 | 17390 | |
918dd910 JK |
17391 | age_cached_comp_units (); |
17392 | ||
5c631832 | 17393 | return retval; |
348e048f DE |
17394 | } |
17395 | ||
8b9737bf TT |
17396 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
17397 | offset. */ | |
17398 | ||
17399 | struct dwarf2_locexpr_baton | |
17400 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
17401 | struct dwarf2_per_cu_data *per_cu, | |
17402 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17403 | void *baton) | |
17404 | { | |
17405 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
17406 | ||
17407 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
17408 | } | |
17409 | ||
8a9b8146 TT |
17410 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
17411 | PER_CU. */ | |
17412 | ||
17413 | struct type * | |
b64f50a1 | 17414 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
17415 | struct dwarf2_per_cu_data *per_cu) |
17416 | { | |
b64f50a1 JK |
17417 | sect_offset die_offset_sect; |
17418 | ||
8a9b8146 | 17419 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
17420 | |
17421 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
17422 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
17423 | } |
17424 | ||
348e048f DE |
17425 | /* Follow the signature attribute ATTR in SRC_DIE. |
17426 | On entry *REF_CU is the CU of SRC_DIE. | |
17427 | On exit *REF_CU is the CU of the result. */ | |
17428 | ||
17429 | static struct die_info * | |
17430 | follow_die_sig (struct die_info *src_die, struct attribute *attr, | |
17431 | struct dwarf2_cu **ref_cu) | |
17432 | { | |
17433 | struct objfile *objfile = (*ref_cu)->objfile; | |
17434 | struct die_info temp_die; | |
17435 | struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr); | |
17436 | struct dwarf2_cu *sig_cu; | |
17437 | struct die_info *die; | |
17438 | ||
17439 | /* sig_type will be NULL if the signatured type is missing from | |
17440 | the debug info. */ | |
17441 | if (sig_type == NULL) | |
17442 | error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE " | |
17443 | "at 0x%x [in module %s]"), | |
b64f50a1 | 17444 | src_die->offset.sect_off, objfile->name); |
348e048f DE |
17445 | |
17446 | /* If necessary, add it to the queue and load its DIEs. */ | |
17447 | ||
95554aad | 17448 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 17449 | read_signatured_type (sig_type); |
348e048f DE |
17450 | |
17451 | gdb_assert (sig_type->per_cu.cu != NULL); | |
17452 | ||
17453 | sig_cu = sig_type->per_cu.cu; | |
3019eac3 DE |
17454 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
17455 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
17456 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
17457 | temp_die.offset.sect_off); | |
348e048f DE |
17458 | if (die) |
17459 | { | |
17460 | *ref_cu = sig_cu; | |
17461 | return die; | |
17462 | } | |
17463 | ||
3e43a32a MS |
17464 | error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced " |
17465 | "from DIE at 0x%x [in module %s]"), | |
b64f50a1 | 17466 | temp_die.offset.sect_off, src_die->offset.sect_off, objfile->name); |
348e048f DE |
17467 | } |
17468 | ||
17469 | /* Given an offset of a signatured type, return its signatured_type. */ | |
17470 | ||
17471 | static struct signatured_type * | |
8b70b953 TT |
17472 | lookup_signatured_type_at_offset (struct objfile *objfile, |
17473 | struct dwarf2_section_info *section, | |
b64f50a1 | 17474 | sect_offset offset) |
348e048f | 17475 | { |
b64f50a1 | 17476 | gdb_byte *info_ptr = section->buffer + offset.sect_off; |
348e048f DE |
17477 | unsigned int length, initial_length_size; |
17478 | unsigned int sig_offset; | |
52dc124a | 17479 | struct signatured_type find_entry, *sig_type; |
348e048f DE |
17480 | |
17481 | length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size); | |
17482 | sig_offset = (initial_length_size | |
17483 | + 2 /*version*/ | |
17484 | + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/ | |
17485 | + 1 /*address_size*/); | |
17486 | find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset); | |
52dc124a | 17487 | sig_type = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); |
348e048f DE |
17488 | |
17489 | /* This is only used to lookup previously recorded types. | |
17490 | If we didn't find it, it's our bug. */ | |
52dc124a DE |
17491 | gdb_assert (sig_type != NULL); |
17492 | gdb_assert (offset.sect_off == sig_type->per_cu.offset.sect_off); | |
348e048f | 17493 | |
52dc124a | 17494 | return sig_type; |
348e048f DE |
17495 | } |
17496 | ||
e5fe5e75 | 17497 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
17498 | |
17499 | static void | |
e5fe5e75 | 17500 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 17501 | { |
52dc124a | 17502 | struct signatured_type *sig_type; |
348e048f | 17503 | |
f4dc4d17 DE |
17504 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
17505 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
17506 | ||
6721b2ec DE |
17507 | /* We have the per_cu, but we need the signatured_type. |
17508 | Fortunately this is an easy translation. */ | |
17509 | gdb_assert (per_cu->is_debug_types); | |
17510 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 17511 | |
6721b2ec | 17512 | gdb_assert (per_cu->cu == NULL); |
348e048f | 17513 | |
52dc124a | 17514 | read_signatured_type (sig_type); |
348e048f | 17515 | |
6721b2ec | 17516 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
17517 | } |
17518 | ||
dee91e82 DE |
17519 | /* die_reader_func for read_signatured_type. |
17520 | This is identical to load_full_comp_unit_reader, | |
17521 | but is kept separate for now. */ | |
348e048f DE |
17522 | |
17523 | static void | |
dee91e82 DE |
17524 | read_signatured_type_reader (const struct die_reader_specs *reader, |
17525 | gdb_byte *info_ptr, | |
17526 | struct die_info *comp_unit_die, | |
17527 | int has_children, | |
17528 | void *data) | |
348e048f | 17529 | { |
dee91e82 | 17530 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 17531 | |
dee91e82 DE |
17532 | gdb_assert (cu->die_hash == NULL); |
17533 | cu->die_hash = | |
17534 | htab_create_alloc_ex (cu->header.length / 12, | |
17535 | die_hash, | |
17536 | die_eq, | |
17537 | NULL, | |
17538 | &cu->comp_unit_obstack, | |
17539 | hashtab_obstack_allocate, | |
17540 | dummy_obstack_deallocate); | |
348e048f | 17541 | |
dee91e82 DE |
17542 | if (has_children) |
17543 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
17544 | &info_ptr, comp_unit_die); | |
17545 | cu->dies = comp_unit_die; | |
17546 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
17547 | |
17548 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 17549 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 17550 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
17551 | or we won't be able to build types correctly. |
17552 | Similarly, if we do not read the producer, we can not apply | |
17553 | producer-specific interpretation. */ | |
95554aad | 17554 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 17555 | } |
348e048f | 17556 | |
3019eac3 DE |
17557 | /* Read in a signatured type and build its CU and DIEs. |
17558 | If the type is a stub for the real type in a DWO file, | |
17559 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
17560 | |
17561 | static void | |
17562 | read_signatured_type (struct signatured_type *sig_type) | |
17563 | { | |
17564 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 17565 | |
3019eac3 | 17566 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 17567 | gdb_assert (per_cu->cu == NULL); |
348e048f | 17568 | |
f4dc4d17 DE |
17569 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
17570 | read_signatured_type_reader, NULL); | |
c906108c SS |
17571 | } |
17572 | ||
c906108c SS |
17573 | /* Decode simple location descriptions. |
17574 | Given a pointer to a dwarf block that defines a location, compute | |
17575 | the location and return the value. | |
17576 | ||
4cecd739 DJ |
17577 | NOTE drow/2003-11-18: This function is called in two situations |
17578 | now: for the address of static or global variables (partial symbols | |
17579 | only) and for offsets into structures which are expected to be | |
17580 | (more or less) constant. The partial symbol case should go away, | |
17581 | and only the constant case should remain. That will let this | |
17582 | function complain more accurately. A few special modes are allowed | |
17583 | without complaint for global variables (for instance, global | |
17584 | register values and thread-local values). | |
c906108c SS |
17585 | |
17586 | A location description containing no operations indicates that the | |
4cecd739 | 17587 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
17588 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
17589 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
17590 | complaint. |
17591 | ||
17592 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
17593 | |
17594 | static CORE_ADDR | |
e7c27a73 | 17595 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 17596 | { |
e7c27a73 | 17597 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
17598 | size_t i; |
17599 | size_t size = blk->size; | |
21ae7a4d JK |
17600 | gdb_byte *data = blk->data; |
17601 | CORE_ADDR stack[64]; | |
17602 | int stacki; | |
17603 | unsigned int bytes_read, unsnd; | |
17604 | gdb_byte op; | |
c906108c | 17605 | |
21ae7a4d JK |
17606 | i = 0; |
17607 | stacki = 0; | |
17608 | stack[stacki] = 0; | |
17609 | stack[++stacki] = 0; | |
17610 | ||
17611 | while (i < size) | |
17612 | { | |
17613 | op = data[i++]; | |
17614 | switch (op) | |
17615 | { | |
17616 | case DW_OP_lit0: | |
17617 | case DW_OP_lit1: | |
17618 | case DW_OP_lit2: | |
17619 | case DW_OP_lit3: | |
17620 | case DW_OP_lit4: | |
17621 | case DW_OP_lit5: | |
17622 | case DW_OP_lit6: | |
17623 | case DW_OP_lit7: | |
17624 | case DW_OP_lit8: | |
17625 | case DW_OP_lit9: | |
17626 | case DW_OP_lit10: | |
17627 | case DW_OP_lit11: | |
17628 | case DW_OP_lit12: | |
17629 | case DW_OP_lit13: | |
17630 | case DW_OP_lit14: | |
17631 | case DW_OP_lit15: | |
17632 | case DW_OP_lit16: | |
17633 | case DW_OP_lit17: | |
17634 | case DW_OP_lit18: | |
17635 | case DW_OP_lit19: | |
17636 | case DW_OP_lit20: | |
17637 | case DW_OP_lit21: | |
17638 | case DW_OP_lit22: | |
17639 | case DW_OP_lit23: | |
17640 | case DW_OP_lit24: | |
17641 | case DW_OP_lit25: | |
17642 | case DW_OP_lit26: | |
17643 | case DW_OP_lit27: | |
17644 | case DW_OP_lit28: | |
17645 | case DW_OP_lit29: | |
17646 | case DW_OP_lit30: | |
17647 | case DW_OP_lit31: | |
17648 | stack[++stacki] = op - DW_OP_lit0; | |
17649 | break; | |
f1bea926 | 17650 | |
21ae7a4d JK |
17651 | case DW_OP_reg0: |
17652 | case DW_OP_reg1: | |
17653 | case DW_OP_reg2: | |
17654 | case DW_OP_reg3: | |
17655 | case DW_OP_reg4: | |
17656 | case DW_OP_reg5: | |
17657 | case DW_OP_reg6: | |
17658 | case DW_OP_reg7: | |
17659 | case DW_OP_reg8: | |
17660 | case DW_OP_reg9: | |
17661 | case DW_OP_reg10: | |
17662 | case DW_OP_reg11: | |
17663 | case DW_OP_reg12: | |
17664 | case DW_OP_reg13: | |
17665 | case DW_OP_reg14: | |
17666 | case DW_OP_reg15: | |
17667 | case DW_OP_reg16: | |
17668 | case DW_OP_reg17: | |
17669 | case DW_OP_reg18: | |
17670 | case DW_OP_reg19: | |
17671 | case DW_OP_reg20: | |
17672 | case DW_OP_reg21: | |
17673 | case DW_OP_reg22: | |
17674 | case DW_OP_reg23: | |
17675 | case DW_OP_reg24: | |
17676 | case DW_OP_reg25: | |
17677 | case DW_OP_reg26: | |
17678 | case DW_OP_reg27: | |
17679 | case DW_OP_reg28: | |
17680 | case DW_OP_reg29: | |
17681 | case DW_OP_reg30: | |
17682 | case DW_OP_reg31: | |
17683 | stack[++stacki] = op - DW_OP_reg0; | |
17684 | if (i < size) | |
17685 | dwarf2_complex_location_expr_complaint (); | |
17686 | break; | |
c906108c | 17687 | |
21ae7a4d JK |
17688 | case DW_OP_regx: |
17689 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
17690 | i += bytes_read; | |
17691 | stack[++stacki] = unsnd; | |
17692 | if (i < size) | |
17693 | dwarf2_complex_location_expr_complaint (); | |
17694 | break; | |
c906108c | 17695 | |
21ae7a4d JK |
17696 | case DW_OP_addr: |
17697 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
17698 | cu, &bytes_read); | |
17699 | i += bytes_read; | |
17700 | break; | |
d53d4ac5 | 17701 | |
21ae7a4d JK |
17702 | case DW_OP_const1u: |
17703 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
17704 | i += 1; | |
17705 | break; | |
17706 | ||
17707 | case DW_OP_const1s: | |
17708 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
17709 | i += 1; | |
17710 | break; | |
17711 | ||
17712 | case DW_OP_const2u: | |
17713 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
17714 | i += 2; | |
17715 | break; | |
17716 | ||
17717 | case DW_OP_const2s: | |
17718 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
17719 | i += 2; | |
17720 | break; | |
d53d4ac5 | 17721 | |
21ae7a4d JK |
17722 | case DW_OP_const4u: |
17723 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
17724 | i += 4; | |
17725 | break; | |
17726 | ||
17727 | case DW_OP_const4s: | |
17728 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
17729 | i += 4; | |
17730 | break; | |
17731 | ||
585861ea JK |
17732 | case DW_OP_const8u: |
17733 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
17734 | i += 8; | |
17735 | break; | |
17736 | ||
21ae7a4d JK |
17737 | case DW_OP_constu: |
17738 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
17739 | &bytes_read); | |
17740 | i += bytes_read; | |
17741 | break; | |
17742 | ||
17743 | case DW_OP_consts: | |
17744 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
17745 | i += bytes_read; | |
17746 | break; | |
17747 | ||
17748 | case DW_OP_dup: | |
17749 | stack[stacki + 1] = stack[stacki]; | |
17750 | stacki++; | |
17751 | break; | |
17752 | ||
17753 | case DW_OP_plus: | |
17754 | stack[stacki - 1] += stack[stacki]; | |
17755 | stacki--; | |
17756 | break; | |
17757 | ||
17758 | case DW_OP_plus_uconst: | |
17759 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
17760 | &bytes_read); | |
17761 | i += bytes_read; | |
17762 | break; | |
17763 | ||
17764 | case DW_OP_minus: | |
17765 | stack[stacki - 1] -= stack[stacki]; | |
17766 | stacki--; | |
17767 | break; | |
17768 | ||
17769 | case DW_OP_deref: | |
17770 | /* If we're not the last op, then we definitely can't encode | |
17771 | this using GDB's address_class enum. This is valid for partial | |
17772 | global symbols, although the variable's address will be bogus | |
17773 | in the psymtab. */ | |
17774 | if (i < size) | |
17775 | dwarf2_complex_location_expr_complaint (); | |
17776 | break; | |
17777 | ||
17778 | case DW_OP_GNU_push_tls_address: | |
17779 | /* The top of the stack has the offset from the beginning | |
17780 | of the thread control block at which the variable is located. */ | |
17781 | /* Nothing should follow this operator, so the top of stack would | |
17782 | be returned. */ | |
17783 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
17784 | address will be bogus in the psymtab. Make it always at least |
17785 | non-zero to not look as a variable garbage collected by linker | |
17786 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
17787 | if (i < size) |
17788 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 17789 | stack[stacki]++; |
21ae7a4d JK |
17790 | break; |
17791 | ||
17792 | case DW_OP_GNU_uninit: | |
17793 | break; | |
17794 | ||
3019eac3 | 17795 | case DW_OP_GNU_addr_index: |
49f6c839 | 17796 | case DW_OP_GNU_const_index: |
3019eac3 DE |
17797 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
17798 | &bytes_read); | |
17799 | i += bytes_read; | |
17800 | break; | |
17801 | ||
21ae7a4d JK |
17802 | default: |
17803 | { | |
f39c6ffd | 17804 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
17805 | |
17806 | if (name) | |
17807 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
17808 | name); | |
17809 | else | |
17810 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
17811 | op); | |
17812 | } | |
17813 | ||
17814 | return (stack[stacki]); | |
d53d4ac5 | 17815 | } |
3c6e0cb3 | 17816 | |
21ae7a4d JK |
17817 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
17818 | outside of the allocated space. Also enforce minimum>0. */ | |
17819 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
17820 | { | |
17821 | complaint (&symfile_complaints, | |
17822 | _("location description stack overflow")); | |
17823 | return 0; | |
17824 | } | |
17825 | ||
17826 | if (stacki <= 0) | |
17827 | { | |
17828 | complaint (&symfile_complaints, | |
17829 | _("location description stack underflow")); | |
17830 | return 0; | |
17831 | } | |
17832 | } | |
17833 | return (stack[stacki]); | |
c906108c SS |
17834 | } |
17835 | ||
17836 | /* memory allocation interface */ | |
17837 | ||
c906108c | 17838 | static struct dwarf_block * |
7b5a2f43 | 17839 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
17840 | { |
17841 | struct dwarf_block *blk; | |
17842 | ||
17843 | blk = (struct dwarf_block *) | |
7b5a2f43 | 17844 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
17845 | return (blk); |
17846 | } | |
17847 | ||
c906108c | 17848 | static struct die_info * |
b60c80d6 | 17849 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
17850 | { |
17851 | struct die_info *die; | |
b60c80d6 DJ |
17852 | size_t size = sizeof (struct die_info); |
17853 | ||
17854 | if (num_attrs > 1) | |
17855 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 17856 | |
b60c80d6 | 17857 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
17858 | memset (die, 0, sizeof (struct die_info)); |
17859 | return (die); | |
17860 | } | |
2e276125 JB |
17861 | |
17862 | \f | |
17863 | /* Macro support. */ | |
17864 | ||
2e276125 JB |
17865 | /* Return the full name of file number I in *LH's file name table. |
17866 | Use COMP_DIR as the name of the current directory of the | |
17867 | compilation. The result is allocated using xmalloc; the caller is | |
17868 | responsible for freeing it. */ | |
17869 | static char * | |
17870 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
17871 | { | |
6a83a1e6 EZ |
17872 | /* Is the file number a valid index into the line header's file name |
17873 | table? Remember that file numbers start with one, not zero. */ | |
17874 | if (1 <= file && file <= lh->num_file_names) | |
17875 | { | |
17876 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 17877 | |
6a83a1e6 EZ |
17878 | if (IS_ABSOLUTE_PATH (fe->name)) |
17879 | return xstrdup (fe->name); | |
17880 | else | |
17881 | { | |
17882 | const char *dir; | |
17883 | int dir_len; | |
17884 | char *full_name; | |
17885 | ||
17886 | if (fe->dir_index) | |
17887 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17888 | else | |
17889 | dir = comp_dir; | |
17890 | ||
17891 | if (dir) | |
17892 | { | |
17893 | dir_len = strlen (dir); | |
17894 | full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); | |
17895 | strcpy (full_name, dir); | |
17896 | full_name[dir_len] = '/'; | |
17897 | strcpy (full_name + dir_len + 1, fe->name); | |
17898 | return full_name; | |
17899 | } | |
17900 | else | |
17901 | return xstrdup (fe->name); | |
17902 | } | |
17903 | } | |
2e276125 JB |
17904 | else |
17905 | { | |
6a83a1e6 EZ |
17906 | /* The compiler produced a bogus file number. We can at least |
17907 | record the macro definitions made in the file, even if we | |
17908 | won't be able to find the file by name. */ | |
17909 | char fake_name[80]; | |
9a619af0 | 17910 | |
8c042590 PM |
17911 | xsnprintf (fake_name, sizeof (fake_name), |
17912 | "<bad macro file number %d>", file); | |
2e276125 | 17913 | |
6e70227d | 17914 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
17915 | _("bad file number in macro information (%d)"), |
17916 | file); | |
2e276125 | 17917 | |
6a83a1e6 | 17918 | return xstrdup (fake_name); |
2e276125 JB |
17919 | } |
17920 | } | |
17921 | ||
17922 | ||
17923 | static struct macro_source_file * | |
17924 | macro_start_file (int file, int line, | |
17925 | struct macro_source_file *current_file, | |
17926 | const char *comp_dir, | |
17927 | struct line_header *lh, struct objfile *objfile) | |
17928 | { | |
17929 | /* The full name of this source file. */ | |
17930 | char *full_name = file_full_name (file, lh, comp_dir); | |
17931 | ||
17932 | /* We don't create a macro table for this compilation unit | |
17933 | at all until we actually get a filename. */ | |
17934 | if (! pending_macros) | |
6532ff36 TT |
17935 | pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack, |
17936 | objfile->per_bfd->macro_cache); | |
2e276125 JB |
17937 | |
17938 | if (! current_file) | |
abc9d0dc TT |
17939 | { |
17940 | /* If we have no current file, then this must be the start_file | |
17941 | directive for the compilation unit's main source file. */ | |
17942 | current_file = macro_set_main (pending_macros, full_name); | |
17943 | macro_define_special (pending_macros); | |
17944 | } | |
2e276125 JB |
17945 | else |
17946 | current_file = macro_include (current_file, line, full_name); | |
17947 | ||
17948 | xfree (full_name); | |
6e70227d | 17949 | |
2e276125 JB |
17950 | return current_file; |
17951 | } | |
17952 | ||
17953 | ||
17954 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
17955 | followed by a null byte. */ | |
17956 | static char * | |
17957 | copy_string (const char *buf, int len) | |
17958 | { | |
17959 | char *s = xmalloc (len + 1); | |
9a619af0 | 17960 | |
2e276125 JB |
17961 | memcpy (s, buf, len); |
17962 | s[len] = '\0'; | |
2e276125 JB |
17963 | return s; |
17964 | } | |
17965 | ||
17966 | ||
17967 | static const char * | |
17968 | consume_improper_spaces (const char *p, const char *body) | |
17969 | { | |
17970 | if (*p == ' ') | |
17971 | { | |
4d3c2250 | 17972 | complaint (&symfile_complaints, |
3e43a32a MS |
17973 | _("macro definition contains spaces " |
17974 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 17975 | body); |
2e276125 JB |
17976 | |
17977 | while (*p == ' ') | |
17978 | p++; | |
17979 | } | |
17980 | ||
17981 | return p; | |
17982 | } | |
17983 | ||
17984 | ||
17985 | static void | |
17986 | parse_macro_definition (struct macro_source_file *file, int line, | |
17987 | const char *body) | |
17988 | { | |
17989 | const char *p; | |
17990 | ||
17991 | /* The body string takes one of two forms. For object-like macro | |
17992 | definitions, it should be: | |
17993 | ||
17994 | <macro name> " " <definition> | |
17995 | ||
17996 | For function-like macro definitions, it should be: | |
17997 | ||
17998 | <macro name> "() " <definition> | |
17999 | or | |
18000 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
18001 | ||
18002 | Spaces may appear only where explicitly indicated, and in the | |
18003 | <definition>. | |
18004 | ||
18005 | The Dwarf 2 spec says that an object-like macro's name is always | |
18006 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 18007 | the space when the macro's definition is the empty string. |
2e276125 JB |
18008 | |
18009 | The Dwarf 2 spec says that there should be no spaces between the | |
18010 | formal arguments in a function-like macro's formal argument list, | |
18011 | but versions of GCC around March 2002 include spaces after the | |
18012 | commas. */ | |
18013 | ||
18014 | ||
18015 | /* Find the extent of the macro name. The macro name is terminated | |
18016 | by either a space or null character (for an object-like macro) or | |
18017 | an opening paren (for a function-like macro). */ | |
18018 | for (p = body; *p; p++) | |
18019 | if (*p == ' ' || *p == '(') | |
18020 | break; | |
18021 | ||
18022 | if (*p == ' ' || *p == '\0') | |
18023 | { | |
18024 | /* It's an object-like macro. */ | |
18025 | int name_len = p - body; | |
18026 | char *name = copy_string (body, name_len); | |
18027 | const char *replacement; | |
18028 | ||
18029 | if (*p == ' ') | |
18030 | replacement = body + name_len + 1; | |
18031 | else | |
18032 | { | |
4d3c2250 | 18033 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18034 | replacement = body + name_len; |
18035 | } | |
6e70227d | 18036 | |
2e276125 JB |
18037 | macro_define_object (file, line, name, replacement); |
18038 | ||
18039 | xfree (name); | |
18040 | } | |
18041 | else if (*p == '(') | |
18042 | { | |
18043 | /* It's a function-like macro. */ | |
18044 | char *name = copy_string (body, p - body); | |
18045 | int argc = 0; | |
18046 | int argv_size = 1; | |
18047 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
18048 | ||
18049 | p++; | |
18050 | ||
18051 | p = consume_improper_spaces (p, body); | |
18052 | ||
18053 | /* Parse the formal argument list. */ | |
18054 | while (*p && *p != ')') | |
18055 | { | |
18056 | /* Find the extent of the current argument name. */ | |
18057 | const char *arg_start = p; | |
18058 | ||
18059 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
18060 | p++; | |
18061 | ||
18062 | if (! *p || p == arg_start) | |
4d3c2250 | 18063 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18064 | else |
18065 | { | |
18066 | /* Make sure argv has room for the new argument. */ | |
18067 | if (argc >= argv_size) | |
18068 | { | |
18069 | argv_size *= 2; | |
18070 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
18071 | } | |
18072 | ||
18073 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
18074 | } | |
18075 | ||
18076 | p = consume_improper_spaces (p, body); | |
18077 | ||
18078 | /* Consume the comma, if present. */ | |
18079 | if (*p == ',') | |
18080 | { | |
18081 | p++; | |
18082 | ||
18083 | p = consume_improper_spaces (p, body); | |
18084 | } | |
18085 | } | |
18086 | ||
18087 | if (*p == ')') | |
18088 | { | |
18089 | p++; | |
18090 | ||
18091 | if (*p == ' ') | |
18092 | /* Perfectly formed definition, no complaints. */ | |
18093 | macro_define_function (file, line, name, | |
6e70227d | 18094 | argc, (const char **) argv, |
2e276125 JB |
18095 | p + 1); |
18096 | else if (*p == '\0') | |
18097 | { | |
18098 | /* Complain, but do define it. */ | |
4d3c2250 | 18099 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 18100 | macro_define_function (file, line, name, |
6e70227d | 18101 | argc, (const char **) argv, |
2e276125 JB |
18102 | p); |
18103 | } | |
18104 | else | |
18105 | /* Just complain. */ | |
4d3c2250 | 18106 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18107 | } |
18108 | else | |
18109 | /* Just complain. */ | |
4d3c2250 | 18110 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18111 | |
18112 | xfree (name); | |
18113 | { | |
18114 | int i; | |
18115 | ||
18116 | for (i = 0; i < argc; i++) | |
18117 | xfree (argv[i]); | |
18118 | } | |
18119 | xfree (argv); | |
18120 | } | |
18121 | else | |
4d3c2250 | 18122 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18123 | } |
18124 | ||
cf2c3c16 TT |
18125 | /* Skip some bytes from BYTES according to the form given in FORM. |
18126 | Returns the new pointer. */ | |
2e276125 | 18127 | |
cf2c3c16 | 18128 | static gdb_byte * |
f664829e | 18129 | skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end, |
cf2c3c16 TT |
18130 | enum dwarf_form form, |
18131 | unsigned int offset_size, | |
18132 | struct dwarf2_section_info *section) | |
2e276125 | 18133 | { |
cf2c3c16 | 18134 | unsigned int bytes_read; |
2e276125 | 18135 | |
cf2c3c16 | 18136 | switch (form) |
2e276125 | 18137 | { |
cf2c3c16 TT |
18138 | case DW_FORM_data1: |
18139 | case DW_FORM_flag: | |
18140 | ++bytes; | |
18141 | break; | |
18142 | ||
18143 | case DW_FORM_data2: | |
18144 | bytes += 2; | |
18145 | break; | |
18146 | ||
18147 | case DW_FORM_data4: | |
18148 | bytes += 4; | |
18149 | break; | |
18150 | ||
18151 | case DW_FORM_data8: | |
18152 | bytes += 8; | |
18153 | break; | |
18154 | ||
18155 | case DW_FORM_string: | |
18156 | read_direct_string (abfd, bytes, &bytes_read); | |
18157 | bytes += bytes_read; | |
18158 | break; | |
18159 | ||
18160 | case DW_FORM_sec_offset: | |
18161 | case DW_FORM_strp: | |
36586728 | 18162 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
18163 | bytes += offset_size; |
18164 | break; | |
18165 | ||
18166 | case DW_FORM_block: | |
18167 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
18168 | bytes += bytes_read; | |
18169 | break; | |
18170 | ||
18171 | case DW_FORM_block1: | |
18172 | bytes += 1 + read_1_byte (abfd, bytes); | |
18173 | break; | |
18174 | case DW_FORM_block2: | |
18175 | bytes += 2 + read_2_bytes (abfd, bytes); | |
18176 | break; | |
18177 | case DW_FORM_block4: | |
18178 | bytes += 4 + read_4_bytes (abfd, bytes); | |
18179 | break; | |
18180 | ||
18181 | case DW_FORM_sdata: | |
18182 | case DW_FORM_udata: | |
3019eac3 DE |
18183 | case DW_FORM_GNU_addr_index: |
18184 | case DW_FORM_GNU_str_index: | |
f664829e DE |
18185 | bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end); |
18186 | if (bytes == NULL) | |
18187 | { | |
18188 | dwarf2_section_buffer_overflow_complaint (section); | |
18189 | return NULL; | |
18190 | } | |
cf2c3c16 TT |
18191 | break; |
18192 | ||
18193 | default: | |
18194 | { | |
18195 | complain: | |
18196 | complaint (&symfile_complaints, | |
18197 | _("invalid form 0x%x in `%s'"), | |
18198 | form, | |
18199 | section->asection->name); | |
18200 | return NULL; | |
18201 | } | |
2e276125 JB |
18202 | } |
18203 | ||
cf2c3c16 TT |
18204 | return bytes; |
18205 | } | |
757a13d0 | 18206 | |
cf2c3c16 TT |
18207 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
18208 | opcode. Returns an updated pointer to the macro data buffer; or, | |
18209 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 18210 | |
cf2c3c16 TT |
18211 | static gdb_byte * |
18212 | skip_unknown_opcode (unsigned int opcode, | |
18213 | gdb_byte **opcode_definitions, | |
f664829e | 18214 | gdb_byte *mac_ptr, gdb_byte *mac_end, |
cf2c3c16 TT |
18215 | bfd *abfd, |
18216 | unsigned int offset_size, | |
18217 | struct dwarf2_section_info *section) | |
18218 | { | |
18219 | unsigned int bytes_read, i; | |
18220 | unsigned long arg; | |
18221 | gdb_byte *defn; | |
2e276125 | 18222 | |
cf2c3c16 | 18223 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 18224 | { |
cf2c3c16 TT |
18225 | complaint (&symfile_complaints, |
18226 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
18227 | opcode); | |
18228 | return NULL; | |
18229 | } | |
2e276125 | 18230 | |
cf2c3c16 TT |
18231 | defn = opcode_definitions[opcode]; |
18232 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
18233 | defn += bytes_read; | |
2e276125 | 18234 | |
cf2c3c16 TT |
18235 | for (i = 0; i < arg; ++i) |
18236 | { | |
f664829e DE |
18237 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
18238 | section); | |
cf2c3c16 TT |
18239 | if (mac_ptr == NULL) |
18240 | { | |
18241 | /* skip_form_bytes already issued the complaint. */ | |
18242 | return NULL; | |
18243 | } | |
18244 | } | |
757a13d0 | 18245 | |
cf2c3c16 TT |
18246 | return mac_ptr; |
18247 | } | |
757a13d0 | 18248 | |
cf2c3c16 TT |
18249 | /* A helper function which parses the header of a macro section. |
18250 | If the macro section is the extended (for now called "GNU") type, | |
18251 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
18252 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 18253 | |
cf2c3c16 TT |
18254 | static gdb_byte * |
18255 | dwarf_parse_macro_header (gdb_byte **opcode_definitions, | |
18256 | bfd *abfd, | |
18257 | gdb_byte *mac_ptr, | |
18258 | unsigned int *offset_size, | |
18259 | int section_is_gnu) | |
18260 | { | |
18261 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 18262 | |
cf2c3c16 TT |
18263 | if (section_is_gnu) |
18264 | { | |
18265 | unsigned int version, flags; | |
757a13d0 | 18266 | |
cf2c3c16 TT |
18267 | version = read_2_bytes (abfd, mac_ptr); |
18268 | if (version != 4) | |
18269 | { | |
18270 | complaint (&symfile_complaints, | |
18271 | _("unrecognized version `%d' in .debug_macro section"), | |
18272 | version); | |
18273 | return NULL; | |
18274 | } | |
18275 | mac_ptr += 2; | |
757a13d0 | 18276 | |
cf2c3c16 TT |
18277 | flags = read_1_byte (abfd, mac_ptr); |
18278 | ++mac_ptr; | |
18279 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 18280 | |
cf2c3c16 TT |
18281 | if ((flags & 2) != 0) |
18282 | /* We don't need the line table offset. */ | |
18283 | mac_ptr += *offset_size; | |
757a13d0 | 18284 | |
cf2c3c16 TT |
18285 | /* Vendor opcode descriptions. */ |
18286 | if ((flags & 4) != 0) | |
18287 | { | |
18288 | unsigned int i, count; | |
757a13d0 | 18289 | |
cf2c3c16 TT |
18290 | count = read_1_byte (abfd, mac_ptr); |
18291 | ++mac_ptr; | |
18292 | for (i = 0; i < count; ++i) | |
18293 | { | |
18294 | unsigned int opcode, bytes_read; | |
18295 | unsigned long arg; | |
18296 | ||
18297 | opcode = read_1_byte (abfd, mac_ptr); | |
18298 | ++mac_ptr; | |
18299 | opcode_definitions[opcode] = mac_ptr; | |
18300 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18301 | mac_ptr += bytes_read; | |
18302 | mac_ptr += arg; | |
18303 | } | |
757a13d0 | 18304 | } |
cf2c3c16 | 18305 | } |
757a13d0 | 18306 | |
cf2c3c16 TT |
18307 | return mac_ptr; |
18308 | } | |
757a13d0 | 18309 | |
cf2c3c16 | 18310 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 18311 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
18312 | |
18313 | static void | |
18314 | dwarf_decode_macro_bytes (bfd *abfd, gdb_byte *mac_ptr, gdb_byte *mac_end, | |
18315 | struct macro_source_file *current_file, | |
18316 | struct line_header *lh, char *comp_dir, | |
18317 | struct dwarf2_section_info *section, | |
36586728 | 18318 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 18319 | unsigned int offset_size, |
8fc3fc34 TT |
18320 | struct objfile *objfile, |
18321 | htab_t include_hash) | |
cf2c3c16 TT |
18322 | { |
18323 | enum dwarf_macro_record_type macinfo_type; | |
18324 | int at_commandline; | |
18325 | gdb_byte *opcode_definitions[256]; | |
757a13d0 | 18326 | |
cf2c3c16 TT |
18327 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
18328 | &offset_size, section_is_gnu); | |
18329 | if (mac_ptr == NULL) | |
18330 | { | |
18331 | /* We already issued a complaint. */ | |
18332 | return; | |
18333 | } | |
757a13d0 JK |
18334 | |
18335 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
18336 | GDB is still reading the definitions from command line. First | |
18337 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
18338 | to create CURRENT_FILE for the main source holding also the command line | |
18339 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
18340 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
18341 | ||
18342 | at_commandline = 1; | |
18343 | ||
18344 | do | |
18345 | { | |
18346 | /* Do we at least have room for a macinfo type byte? */ | |
18347 | if (mac_ptr >= mac_end) | |
18348 | { | |
f664829e | 18349 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
18350 | break; |
18351 | } | |
18352 | ||
18353 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
18354 | mac_ptr++; | |
18355 | ||
cf2c3c16 TT |
18356 | /* Note that we rely on the fact that the corresponding GNU and |
18357 | DWARF constants are the same. */ | |
757a13d0 JK |
18358 | switch (macinfo_type) |
18359 | { | |
18360 | /* A zero macinfo type indicates the end of the macro | |
18361 | information. */ | |
18362 | case 0: | |
18363 | break; | |
2e276125 | 18364 | |
cf2c3c16 TT |
18365 | case DW_MACRO_GNU_define: |
18366 | case DW_MACRO_GNU_undef: | |
18367 | case DW_MACRO_GNU_define_indirect: | |
18368 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
18369 | case DW_MACRO_GNU_define_indirect_alt: |
18370 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 18371 | { |
891d2f0b | 18372 | unsigned int bytes_read; |
2e276125 JB |
18373 | int line; |
18374 | char *body; | |
cf2c3c16 | 18375 | int is_define; |
2e276125 | 18376 | |
cf2c3c16 TT |
18377 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
18378 | mac_ptr += bytes_read; | |
18379 | ||
18380 | if (macinfo_type == DW_MACRO_GNU_define | |
18381 | || macinfo_type == DW_MACRO_GNU_undef) | |
18382 | { | |
18383 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
18384 | mac_ptr += bytes_read; | |
18385 | } | |
18386 | else | |
18387 | { | |
18388 | LONGEST str_offset; | |
18389 | ||
18390 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18391 | mac_ptr += offset_size; | |
2e276125 | 18392 | |
36586728 | 18393 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
18394 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
18395 | || section_is_dwz) | |
36586728 TT |
18396 | { |
18397 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18398 | ||
18399 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
18400 | } | |
18401 | else | |
18402 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
18403 | } |
18404 | ||
18405 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
18406 | || macinfo_type == DW_MACRO_GNU_define_indirect |
18407 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 18408 | if (! current_file) |
757a13d0 JK |
18409 | { |
18410 | /* DWARF violation as no main source is present. */ | |
18411 | complaint (&symfile_complaints, | |
18412 | _("debug info with no main source gives macro %s " | |
18413 | "on line %d: %s"), | |
cf2c3c16 TT |
18414 | is_define ? _("definition") : _("undefinition"), |
18415 | line, body); | |
757a13d0 JK |
18416 | break; |
18417 | } | |
3e43a32a MS |
18418 | if ((line == 0 && !at_commandline) |
18419 | || (line != 0 && at_commandline)) | |
4d3c2250 | 18420 | complaint (&symfile_complaints, |
757a13d0 JK |
18421 | _("debug info gives %s macro %s with %s line %d: %s"), |
18422 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 18423 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
18424 | line == 0 ? _("zero") : _("non-zero"), line, body); |
18425 | ||
cf2c3c16 | 18426 | if (is_define) |
757a13d0 | 18427 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
18428 | else |
18429 | { | |
18430 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
18431 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
18432 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
18433 | macro_undef (current_file, line, body); |
18434 | } | |
2e276125 JB |
18435 | } |
18436 | break; | |
18437 | ||
cf2c3c16 | 18438 | case DW_MACRO_GNU_start_file: |
2e276125 | 18439 | { |
891d2f0b | 18440 | unsigned int bytes_read; |
2e276125 JB |
18441 | int line, file; |
18442 | ||
18443 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18444 | mac_ptr += bytes_read; | |
18445 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18446 | mac_ptr += bytes_read; | |
18447 | ||
3e43a32a MS |
18448 | if ((line == 0 && !at_commandline) |
18449 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
18450 | complaint (&symfile_complaints, |
18451 | _("debug info gives source %d included " | |
18452 | "from %s at %s line %d"), | |
18453 | file, at_commandline ? _("command-line") : _("file"), | |
18454 | line == 0 ? _("zero") : _("non-zero"), line); | |
18455 | ||
18456 | if (at_commandline) | |
18457 | { | |
cf2c3c16 TT |
18458 | /* This DW_MACRO_GNU_start_file was executed in the |
18459 | pass one. */ | |
757a13d0 JK |
18460 | at_commandline = 0; |
18461 | } | |
18462 | else | |
18463 | current_file = macro_start_file (file, line, | |
18464 | current_file, comp_dir, | |
cf2c3c16 | 18465 | lh, objfile); |
2e276125 JB |
18466 | } |
18467 | break; | |
18468 | ||
cf2c3c16 | 18469 | case DW_MACRO_GNU_end_file: |
2e276125 | 18470 | if (! current_file) |
4d3c2250 | 18471 | complaint (&symfile_complaints, |
3e43a32a MS |
18472 | _("macro debug info has an unmatched " |
18473 | "`close_file' directive")); | |
2e276125 JB |
18474 | else |
18475 | { | |
18476 | current_file = current_file->included_by; | |
18477 | if (! current_file) | |
18478 | { | |
cf2c3c16 | 18479 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
18480 | |
18481 | /* GCC circa March 2002 doesn't produce the zero | |
18482 | type byte marking the end of the compilation | |
18483 | unit. Complain if it's not there, but exit no | |
18484 | matter what. */ | |
18485 | ||
18486 | /* Do we at least have room for a macinfo type byte? */ | |
18487 | if (mac_ptr >= mac_end) | |
18488 | { | |
f664829e | 18489 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
18490 | return; |
18491 | } | |
18492 | ||
18493 | /* We don't increment mac_ptr here, so this is just | |
18494 | a look-ahead. */ | |
18495 | next_type = read_1_byte (abfd, mac_ptr); | |
18496 | if (next_type != 0) | |
4d3c2250 | 18497 | complaint (&symfile_complaints, |
3e43a32a MS |
18498 | _("no terminating 0-type entry for " |
18499 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
18500 | |
18501 | return; | |
18502 | } | |
18503 | } | |
18504 | break; | |
18505 | ||
cf2c3c16 | 18506 | case DW_MACRO_GNU_transparent_include: |
36586728 | 18507 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
18508 | { |
18509 | LONGEST offset; | |
8fc3fc34 | 18510 | void **slot; |
a036ba48 TT |
18511 | bfd *include_bfd = abfd; |
18512 | struct dwarf2_section_info *include_section = section; | |
18513 | struct dwarf2_section_info alt_section; | |
18514 | gdb_byte *include_mac_end = mac_end; | |
18515 | int is_dwz = section_is_dwz; | |
18516 | gdb_byte *new_mac_ptr; | |
cf2c3c16 TT |
18517 | |
18518 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18519 | mac_ptr += offset_size; | |
18520 | ||
a036ba48 TT |
18521 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
18522 | { | |
18523 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18524 | ||
18525 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
18526 | &dwz->macro); | |
18527 | ||
18528 | include_bfd = dwz->macro.asection->owner; | |
18529 | include_section = &dwz->macro; | |
18530 | include_mac_end = dwz->macro.buffer + dwz->macro.size; | |
18531 | is_dwz = 1; | |
18532 | } | |
18533 | ||
18534 | new_mac_ptr = include_section->buffer + offset; | |
18535 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
18536 | ||
8fc3fc34 TT |
18537 | if (*slot != NULL) |
18538 | { | |
18539 | /* This has actually happened; see | |
18540 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
18541 | complaint (&symfile_complaints, | |
18542 | _("recursive DW_MACRO_GNU_transparent_include in " | |
18543 | ".debug_macro section")); | |
18544 | } | |
18545 | else | |
18546 | { | |
a036ba48 | 18547 | *slot = new_mac_ptr; |
36586728 | 18548 | |
a036ba48 | 18549 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 18550 | include_mac_end, current_file, |
8fc3fc34 | 18551 | lh, comp_dir, |
36586728 | 18552 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
18553 | offset_size, objfile, include_hash); |
18554 | ||
a036ba48 | 18555 | htab_remove_elt (include_hash, new_mac_ptr); |
8fc3fc34 | 18556 | } |
cf2c3c16 TT |
18557 | } |
18558 | break; | |
18559 | ||
2e276125 | 18560 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
18561 | if (!section_is_gnu) |
18562 | { | |
18563 | unsigned int bytes_read; | |
18564 | int constant; | |
2e276125 | 18565 | |
cf2c3c16 TT |
18566 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
18567 | mac_ptr += bytes_read; | |
18568 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
18569 | mac_ptr += bytes_read; | |
2e276125 | 18570 | |
cf2c3c16 TT |
18571 | /* We don't recognize any vendor extensions. */ |
18572 | break; | |
18573 | } | |
18574 | /* FALLTHROUGH */ | |
18575 | ||
18576 | default: | |
18577 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 18578 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
18579 | section); |
18580 | if (mac_ptr == NULL) | |
18581 | return; | |
18582 | break; | |
2e276125 | 18583 | } |
757a13d0 | 18584 | } while (macinfo_type != 0); |
2e276125 | 18585 | } |
8e19ed76 | 18586 | |
cf2c3c16 | 18587 | static void |
09262596 DE |
18588 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
18589 | char *comp_dir, int section_is_gnu) | |
cf2c3c16 | 18590 | { |
bb5ed363 | 18591 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
18592 | struct line_header *lh = cu->line_header; |
18593 | bfd *abfd; | |
cf2c3c16 TT |
18594 | gdb_byte *mac_ptr, *mac_end; |
18595 | struct macro_source_file *current_file = 0; | |
18596 | enum dwarf_macro_record_type macinfo_type; | |
18597 | unsigned int offset_size = cu->header.offset_size; | |
18598 | gdb_byte *opcode_definitions[256]; | |
8fc3fc34 TT |
18599 | struct cleanup *cleanup; |
18600 | htab_t include_hash; | |
18601 | void **slot; | |
09262596 DE |
18602 | struct dwarf2_section_info *section; |
18603 | const char *section_name; | |
18604 | ||
18605 | if (cu->dwo_unit != NULL) | |
18606 | { | |
18607 | if (section_is_gnu) | |
18608 | { | |
18609 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
18610 | section_name = ".debug_macro.dwo"; | |
18611 | } | |
18612 | else | |
18613 | { | |
18614 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
18615 | section_name = ".debug_macinfo.dwo"; | |
18616 | } | |
18617 | } | |
18618 | else | |
18619 | { | |
18620 | if (section_is_gnu) | |
18621 | { | |
18622 | section = &dwarf2_per_objfile->macro; | |
18623 | section_name = ".debug_macro"; | |
18624 | } | |
18625 | else | |
18626 | { | |
18627 | section = &dwarf2_per_objfile->macinfo; | |
18628 | section_name = ".debug_macinfo"; | |
18629 | } | |
18630 | } | |
cf2c3c16 | 18631 | |
bb5ed363 | 18632 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
18633 | if (section->buffer == NULL) |
18634 | { | |
fceca515 | 18635 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
18636 | return; |
18637 | } | |
09262596 | 18638 | abfd = section->asection->owner; |
cf2c3c16 TT |
18639 | |
18640 | /* First pass: Find the name of the base filename. | |
18641 | This filename is needed in order to process all macros whose definition | |
18642 | (or undefinition) comes from the command line. These macros are defined | |
18643 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
18644 | associated to the base file. | |
18645 | ||
18646 | To determine the base file name, we scan the macro definitions until we | |
18647 | reach the first DW_MACINFO_start_file entry. We then initialize | |
18648 | CURRENT_FILE accordingly so that any macro definition found before the | |
18649 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
18650 | ||
18651 | mac_ptr = section->buffer + offset; | |
18652 | mac_end = section->buffer + section->size; | |
18653 | ||
18654 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
18655 | &offset_size, section_is_gnu); | |
18656 | if (mac_ptr == NULL) | |
18657 | { | |
18658 | /* We already issued a complaint. */ | |
18659 | return; | |
18660 | } | |
18661 | ||
18662 | do | |
18663 | { | |
18664 | /* Do we at least have room for a macinfo type byte? */ | |
18665 | if (mac_ptr >= mac_end) | |
18666 | { | |
18667 | /* Complaint is printed during the second pass as GDB will probably | |
18668 | stop the first pass earlier upon finding | |
18669 | DW_MACINFO_start_file. */ | |
18670 | break; | |
18671 | } | |
18672 | ||
18673 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
18674 | mac_ptr++; | |
18675 | ||
18676 | /* Note that we rely on the fact that the corresponding GNU and | |
18677 | DWARF constants are the same. */ | |
18678 | switch (macinfo_type) | |
18679 | { | |
18680 | /* A zero macinfo type indicates the end of the macro | |
18681 | information. */ | |
18682 | case 0: | |
18683 | break; | |
18684 | ||
18685 | case DW_MACRO_GNU_define: | |
18686 | case DW_MACRO_GNU_undef: | |
18687 | /* Only skip the data by MAC_PTR. */ | |
18688 | { | |
18689 | unsigned int bytes_read; | |
18690 | ||
18691 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18692 | mac_ptr += bytes_read; | |
18693 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
18694 | mac_ptr += bytes_read; | |
18695 | } | |
18696 | break; | |
18697 | ||
18698 | case DW_MACRO_GNU_start_file: | |
18699 | { | |
18700 | unsigned int bytes_read; | |
18701 | int line, file; | |
18702 | ||
18703 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18704 | mac_ptr += bytes_read; | |
18705 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18706 | mac_ptr += bytes_read; | |
18707 | ||
18708 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 18709 | comp_dir, lh, objfile); |
cf2c3c16 TT |
18710 | } |
18711 | break; | |
18712 | ||
18713 | case DW_MACRO_GNU_end_file: | |
18714 | /* No data to skip by MAC_PTR. */ | |
18715 | break; | |
18716 | ||
18717 | case DW_MACRO_GNU_define_indirect: | |
18718 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
18719 | case DW_MACRO_GNU_define_indirect_alt: |
18720 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
18721 | { |
18722 | unsigned int bytes_read; | |
18723 | ||
18724 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18725 | mac_ptr += bytes_read; | |
18726 | mac_ptr += offset_size; | |
18727 | } | |
18728 | break; | |
18729 | ||
18730 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 18731 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
18732 | /* Note that, according to the spec, a transparent include |
18733 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
18734 | skip this opcode. */ | |
18735 | mac_ptr += offset_size; | |
18736 | break; | |
18737 | ||
18738 | case DW_MACINFO_vendor_ext: | |
18739 | /* Only skip the data by MAC_PTR. */ | |
18740 | if (!section_is_gnu) | |
18741 | { | |
18742 | unsigned int bytes_read; | |
18743 | ||
18744 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18745 | mac_ptr += bytes_read; | |
18746 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
18747 | mac_ptr += bytes_read; | |
18748 | } | |
18749 | /* FALLTHROUGH */ | |
18750 | ||
18751 | default: | |
18752 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 18753 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
18754 | section); |
18755 | if (mac_ptr == NULL) | |
18756 | return; | |
18757 | break; | |
18758 | } | |
18759 | } while (macinfo_type != 0 && current_file == NULL); | |
18760 | ||
18761 | /* Second pass: Process all entries. | |
18762 | ||
18763 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
18764 | command-line macro definitions/undefinitions. This flag is unset when we | |
18765 | reach the first DW_MACINFO_start_file entry. */ | |
18766 | ||
8fc3fc34 TT |
18767 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
18768 | NULL, xcalloc, xfree); | |
18769 | cleanup = make_cleanup_htab_delete (include_hash); | |
18770 | mac_ptr = section->buffer + offset; | |
18771 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
18772 | *slot = mac_ptr; | |
18773 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, | |
36586728 TT |
18774 | current_file, lh, comp_dir, section, |
18775 | section_is_gnu, 0, | |
8fc3fc34 TT |
18776 | offset_size, objfile, include_hash); |
18777 | do_cleanups (cleanup); | |
cf2c3c16 TT |
18778 | } |
18779 | ||
8e19ed76 | 18780 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 18781 | if so return true else false. */ |
380bca97 | 18782 | |
8e19ed76 PS |
18783 | static int |
18784 | attr_form_is_block (struct attribute *attr) | |
18785 | { | |
18786 | return (attr == NULL ? 0 : | |
18787 | attr->form == DW_FORM_block1 | |
18788 | || attr->form == DW_FORM_block2 | |
18789 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
18790 | || attr->form == DW_FORM_block |
18791 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 18792 | } |
4c2df51b | 18793 | |
c6a0999f JB |
18794 | /* Return non-zero if ATTR's value is a section offset --- classes |
18795 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
18796 | You may use DW_UNSND (attr) to retrieve such offsets. | |
18797 | ||
18798 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
18799 | may have a value that belongs to more than one of these classes; it | |
18800 | would be ambiguous if we did, because we use the same forms for all | |
18801 | of them. */ | |
380bca97 | 18802 | |
3690dd37 JB |
18803 | static int |
18804 | attr_form_is_section_offset (struct attribute *attr) | |
18805 | { | |
18806 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
18807 | || attr->form == DW_FORM_data8 |
18808 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
18809 | } |
18810 | ||
3690dd37 JB |
18811 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
18812 | zero otherwise. When this function returns true, you can apply | |
18813 | dwarf2_get_attr_constant_value to it. | |
18814 | ||
18815 | However, note that for some attributes you must check | |
18816 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
18817 | and DW_FORM_data8 are members of both the constant class, and of | |
18818 | the classes that contain offsets into other debug sections | |
18819 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
18820 | that, if an attribute's can be either a constant or one of the | |
18821 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
18822 | taken as section offsets, not constants. */ | |
380bca97 | 18823 | |
3690dd37 JB |
18824 | static int |
18825 | attr_form_is_constant (struct attribute *attr) | |
18826 | { | |
18827 | switch (attr->form) | |
18828 | { | |
18829 | case DW_FORM_sdata: | |
18830 | case DW_FORM_udata: | |
18831 | case DW_FORM_data1: | |
18832 | case DW_FORM_data2: | |
18833 | case DW_FORM_data4: | |
18834 | case DW_FORM_data8: | |
18835 | return 1; | |
18836 | default: | |
18837 | return 0; | |
18838 | } | |
18839 | } | |
18840 | ||
3019eac3 DE |
18841 | /* Return the .debug_loc section to use for CU. |
18842 | For DWO files use .debug_loc.dwo. */ | |
18843 | ||
18844 | static struct dwarf2_section_info * | |
18845 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
18846 | { | |
18847 | if (cu->dwo_unit) | |
18848 | return &cu->dwo_unit->dwo_file->sections.loc; | |
18849 | return &dwarf2_per_objfile->loc; | |
18850 | } | |
18851 | ||
8cf6f0b1 TT |
18852 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
18853 | ||
18854 | static void | |
18855 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
18856 | struct dwarf2_loclist_baton *baton, | |
18857 | struct attribute *attr) | |
18858 | { | |
3019eac3 DE |
18859 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
18860 | ||
18861 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
18862 | |
18863 | baton->per_cu = cu->per_cu; | |
18864 | gdb_assert (baton->per_cu); | |
18865 | /* We don't know how long the location list is, but make sure we | |
18866 | don't run off the edge of the section. */ | |
3019eac3 DE |
18867 | baton->size = section->size - DW_UNSND (attr); |
18868 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 18869 | baton->base_address = cu->base_address; |
f664829e | 18870 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
18871 | } |
18872 | ||
4c2df51b DJ |
18873 | static void |
18874 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18875 | struct dwarf2_cu *cu) |
4c2df51b | 18876 | { |
bb5ed363 | 18877 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 18878 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 18879 | |
3690dd37 | 18880 | if (attr_form_is_section_offset (attr) |
3019eac3 | 18881 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
18882 | the section. If so, fall through to the complaint in the |
18883 | other branch. */ | |
3019eac3 | 18884 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 18885 | { |
0d53c4c4 | 18886 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 18887 | |
bb5ed363 | 18888 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 18889 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 18890 | |
8cf6f0b1 | 18891 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 18892 | |
d00adf39 | 18893 | if (cu->base_known == 0) |
0d53c4c4 | 18894 | complaint (&symfile_complaints, |
3e43a32a MS |
18895 | _("Location list used without " |
18896 | "specifying the CU base address.")); | |
4c2df51b | 18897 | |
768a979c | 18898 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs; |
0d53c4c4 DJ |
18899 | SYMBOL_LOCATION_BATON (sym) = baton; |
18900 | } | |
18901 | else | |
18902 | { | |
18903 | struct dwarf2_locexpr_baton *baton; | |
18904 | ||
bb5ed363 | 18905 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 18906 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
18907 | baton->per_cu = cu->per_cu; |
18908 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
18909 | |
18910 | if (attr_form_is_block (attr)) | |
18911 | { | |
18912 | /* Note that we're just copying the block's data pointer | |
18913 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
18914 | info_buffer for SYM's objfile; right now we never release |
18915 | that buffer, but when we do clean up properly this may | |
18916 | need to change. */ | |
0d53c4c4 DJ |
18917 | baton->size = DW_BLOCK (attr)->size; |
18918 | baton->data = DW_BLOCK (attr)->data; | |
18919 | } | |
18920 | else | |
18921 | { | |
18922 | dwarf2_invalid_attrib_class_complaint ("location description", | |
18923 | SYMBOL_NATURAL_NAME (sym)); | |
18924 | baton->size = 0; | |
0d53c4c4 | 18925 | } |
6e70227d | 18926 | |
768a979c | 18927 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; |
0d53c4c4 DJ |
18928 | SYMBOL_LOCATION_BATON (sym) = baton; |
18929 | } | |
4c2df51b | 18930 | } |
6502dd73 | 18931 | |
9aa1f1e3 TT |
18932 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
18933 | came from a separate debuginfo file, then the master objfile is | |
18934 | returned. */ | |
ae0d2f24 UW |
18935 | |
18936 | struct objfile * | |
18937 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
18938 | { | |
9291a0cd | 18939 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
18940 | |
18941 | /* Return the master objfile, so that we can report and look up the | |
18942 | correct file containing this variable. */ | |
18943 | if (objfile->separate_debug_objfile_backlink) | |
18944 | objfile = objfile->separate_debug_objfile_backlink; | |
18945 | ||
18946 | return objfile; | |
18947 | } | |
18948 | ||
96408a79 SA |
18949 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
18950 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
18951 | CU_HEADERP first. */ | |
18952 | ||
18953 | static const struct comp_unit_head * | |
18954 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
18955 | struct dwarf2_per_cu_data *per_cu) | |
18956 | { | |
96408a79 SA |
18957 | gdb_byte *info_ptr; |
18958 | ||
18959 | if (per_cu->cu) | |
18960 | return &per_cu->cu->header; | |
18961 | ||
0bc3a05c | 18962 | info_ptr = per_cu->info_or_types_section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
18963 | |
18964 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 18965 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
18966 | |
18967 | return cu_headerp; | |
18968 | } | |
18969 | ||
ae0d2f24 UW |
18970 | /* Return the address size given in the compilation unit header for CU. */ |
18971 | ||
98714339 | 18972 | int |
ae0d2f24 UW |
18973 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
18974 | { | |
96408a79 SA |
18975 | struct comp_unit_head cu_header_local; |
18976 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 18977 | |
96408a79 SA |
18978 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
18979 | ||
18980 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
18981 | } |
18982 | ||
9eae7c52 TT |
18983 | /* Return the offset size given in the compilation unit header for CU. */ |
18984 | ||
18985 | int | |
18986 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
18987 | { | |
96408a79 SA |
18988 | struct comp_unit_head cu_header_local; |
18989 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 18990 | |
96408a79 SA |
18991 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
18992 | ||
18993 | return cu_headerp->offset_size; | |
18994 | } | |
18995 | ||
18996 | /* See its dwarf2loc.h declaration. */ | |
18997 | ||
18998 | int | |
18999 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
19000 | { | |
19001 | struct comp_unit_head cu_header_local; | |
19002 | const struct comp_unit_head *cu_headerp; | |
19003 | ||
19004 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
19005 | ||
19006 | if (cu_headerp->version == 2) | |
19007 | return cu_headerp->addr_size; | |
19008 | else | |
19009 | return cu_headerp->offset_size; | |
181cebd4 JK |
19010 | } |
19011 | ||
9aa1f1e3 TT |
19012 | /* Return the text offset of the CU. The returned offset comes from |
19013 | this CU's objfile. If this objfile came from a separate debuginfo | |
19014 | file, then the offset may be different from the corresponding | |
19015 | offset in the parent objfile. */ | |
19016 | ||
19017 | CORE_ADDR | |
19018 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
19019 | { | |
bb3fa9d0 | 19020 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
19021 | |
19022 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
19023 | } | |
19024 | ||
348e048f DE |
19025 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
19026 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
19027 | |
19028 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 19029 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 19030 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
19031 | struct objfile *objfile) |
19032 | { | |
19033 | struct dwarf2_per_cu_data *this_cu; | |
19034 | int low, high; | |
36586728 | 19035 | const sect_offset *cu_off; |
ae038cb0 | 19036 | |
ae038cb0 DJ |
19037 | low = 0; |
19038 | high = dwarf2_per_objfile->n_comp_units - 1; | |
19039 | while (high > low) | |
19040 | { | |
36586728 | 19041 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 19042 | int mid = low + (high - low) / 2; |
9a619af0 | 19043 | |
36586728 TT |
19044 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
19045 | cu_off = &mid_cu->offset; | |
19046 | if (mid_cu->is_dwz > offset_in_dwz | |
19047 | || (mid_cu->is_dwz == offset_in_dwz | |
19048 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
19049 | high = mid; |
19050 | else | |
19051 | low = mid + 1; | |
19052 | } | |
19053 | gdb_assert (low == high); | |
36586728 TT |
19054 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
19055 | cu_off = &this_cu->offset; | |
19056 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 19057 | { |
36586728 | 19058 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
19059 | error (_("Dwarf Error: could not find partial DIE containing " |
19060 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 19061 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 19062 | |
b64f50a1 JK |
19063 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
19064 | <= offset.sect_off); | |
ae038cb0 DJ |
19065 | return dwarf2_per_objfile->all_comp_units[low-1]; |
19066 | } | |
19067 | else | |
19068 | { | |
19069 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
19070 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
19071 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
19072 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
19073 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
19074 | return this_cu; |
19075 | } | |
19076 | } | |
19077 | ||
23745b47 | 19078 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 19079 | |
9816fde3 | 19080 | static void |
23745b47 | 19081 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 19082 | { |
9816fde3 | 19083 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
19084 | per_cu->cu = cu; |
19085 | cu->per_cu = per_cu; | |
19086 | cu->objfile = per_cu->objfile; | |
93311388 | 19087 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
19088 | } |
19089 | ||
19090 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
19091 | ||
19092 | static void | |
95554aad TT |
19093 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
19094 | enum language pretend_language) | |
9816fde3 JK |
19095 | { |
19096 | struct attribute *attr; | |
19097 | ||
19098 | /* Set the language we're debugging. */ | |
19099 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
19100 | if (attr) | |
19101 | set_cu_language (DW_UNSND (attr), cu); | |
19102 | else | |
9cded63f | 19103 | { |
95554aad | 19104 | cu->language = pretend_language; |
9cded63f TT |
19105 | cu->language_defn = language_def (cu->language); |
19106 | } | |
dee91e82 DE |
19107 | |
19108 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
19109 | if (attr) | |
19110 | cu->producer = DW_STRING (attr); | |
93311388 DE |
19111 | } |
19112 | ||
ae038cb0 DJ |
19113 | /* Release one cached compilation unit, CU. We unlink it from the tree |
19114 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
19115 | the caller is responsible for that. |
19116 | NOTE: DATA is a void * because this function is also used as a | |
19117 | cleanup routine. */ | |
ae038cb0 DJ |
19118 | |
19119 | static void | |
68dc6402 | 19120 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
19121 | { |
19122 | struct dwarf2_cu *cu = data; | |
19123 | ||
23745b47 DE |
19124 | gdb_assert (cu->per_cu != NULL); |
19125 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
19126 | cu->per_cu = NULL; |
19127 | ||
19128 | obstack_free (&cu->comp_unit_obstack, NULL); | |
19129 | ||
19130 | xfree (cu); | |
19131 | } | |
19132 | ||
72bf9492 | 19133 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 19134 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 19135 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
19136 | |
19137 | static void | |
19138 | free_stack_comp_unit (void *data) | |
19139 | { | |
19140 | struct dwarf2_cu *cu = data; | |
19141 | ||
23745b47 DE |
19142 | gdb_assert (cu->per_cu != NULL); |
19143 | cu->per_cu->cu = NULL; | |
19144 | cu->per_cu = NULL; | |
19145 | ||
72bf9492 DJ |
19146 | obstack_free (&cu->comp_unit_obstack, NULL); |
19147 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
19148 | } |
19149 | ||
19150 | /* Free all cached compilation units. */ | |
19151 | ||
19152 | static void | |
19153 | free_cached_comp_units (void *data) | |
19154 | { | |
19155 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19156 | ||
19157 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19158 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19159 | while (per_cu != NULL) | |
19160 | { | |
19161 | struct dwarf2_per_cu_data *next_cu; | |
19162 | ||
19163 | next_cu = per_cu->cu->read_in_chain; | |
19164 | ||
68dc6402 | 19165 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19166 | *last_chain = next_cu; |
19167 | ||
19168 | per_cu = next_cu; | |
19169 | } | |
19170 | } | |
19171 | ||
19172 | /* Increase the age counter on each cached compilation unit, and free | |
19173 | any that are too old. */ | |
19174 | ||
19175 | static void | |
19176 | age_cached_comp_units (void) | |
19177 | { | |
19178 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19179 | ||
19180 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
19181 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19182 | while (per_cu != NULL) | |
19183 | { | |
19184 | per_cu->cu->last_used ++; | |
19185 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
19186 | dwarf2_mark (per_cu->cu); | |
19187 | per_cu = per_cu->cu->read_in_chain; | |
19188 | } | |
19189 | ||
19190 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19191 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19192 | while (per_cu != NULL) | |
19193 | { | |
19194 | struct dwarf2_per_cu_data *next_cu; | |
19195 | ||
19196 | next_cu = per_cu->cu->read_in_chain; | |
19197 | ||
19198 | if (!per_cu->cu->mark) | |
19199 | { | |
68dc6402 | 19200 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19201 | *last_chain = next_cu; |
19202 | } | |
19203 | else | |
19204 | last_chain = &per_cu->cu->read_in_chain; | |
19205 | ||
19206 | per_cu = next_cu; | |
19207 | } | |
19208 | } | |
19209 | ||
19210 | /* Remove a single compilation unit from the cache. */ | |
19211 | ||
19212 | static void | |
dee91e82 | 19213 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
19214 | { |
19215 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19216 | ||
19217 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19218 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19219 | while (per_cu != NULL) | |
19220 | { | |
19221 | struct dwarf2_per_cu_data *next_cu; | |
19222 | ||
19223 | next_cu = per_cu->cu->read_in_chain; | |
19224 | ||
dee91e82 | 19225 | if (per_cu == target_per_cu) |
ae038cb0 | 19226 | { |
68dc6402 | 19227 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 19228 | per_cu->cu = NULL; |
ae038cb0 DJ |
19229 | *last_chain = next_cu; |
19230 | break; | |
19231 | } | |
19232 | else | |
19233 | last_chain = &per_cu->cu->read_in_chain; | |
19234 | ||
19235 | per_cu = next_cu; | |
19236 | } | |
19237 | } | |
19238 | ||
fe3e1990 DJ |
19239 | /* Release all extra memory associated with OBJFILE. */ |
19240 | ||
19241 | void | |
19242 | dwarf2_free_objfile (struct objfile *objfile) | |
19243 | { | |
19244 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
19245 | ||
19246 | if (dwarf2_per_objfile == NULL) | |
19247 | return; | |
19248 | ||
19249 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
19250 | free_cached_comp_units (NULL); | |
19251 | ||
7b9f3c50 DE |
19252 | if (dwarf2_per_objfile->quick_file_names_table) |
19253 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 19254 | |
fe3e1990 DJ |
19255 | /* Everything else should be on the objfile obstack. */ |
19256 | } | |
19257 | ||
dee91e82 DE |
19258 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
19259 | We store these in a hash table separate from the DIEs, and preserve them | |
19260 | when the DIEs are flushed out of cache. | |
19261 | ||
19262 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 DE |
19263 | uniquely identify the type. A file may have multiple .debug_types sections, |
19264 | or the type may come from a DWO file. We have to use something in | |
19265 | dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup | |
19266 | routine, get_die_type_at_offset, from outside this file, and thus won't | |
19267 | necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life | |
19268 | of the objfile. */ | |
1c379e20 | 19269 | |
dee91e82 | 19270 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 19271 | { |
dee91e82 | 19272 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 19273 | sect_offset offset; |
1c379e20 DJ |
19274 | struct type *type; |
19275 | }; | |
19276 | ||
dee91e82 | 19277 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19278 | |
19279 | static hashval_t | |
dee91e82 | 19280 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 19281 | { |
dee91e82 | 19282 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 19283 | |
dee91e82 | 19284 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
19285 | } |
19286 | ||
dee91e82 | 19287 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19288 | |
19289 | static int | |
dee91e82 | 19290 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 19291 | { |
dee91e82 DE |
19292 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
19293 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 19294 | |
dee91e82 DE |
19295 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
19296 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
19297 | } |
19298 | ||
19299 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
19300 | table if necessary. For convenience, return TYPE. |
19301 | ||
19302 | The DIEs reading must have careful ordering to: | |
19303 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
19304 | reading current DIE. | |
19305 | * Not trying to dereference contents of still incompletely read in types | |
19306 | while reading in other DIEs. | |
19307 | * Enable referencing still incompletely read in types just by a pointer to | |
19308 | the type without accessing its fields. | |
19309 | ||
19310 | Therefore caller should follow these rules: | |
19311 | * Try to fetch any prerequisite types we may need to build this DIE type | |
19312 | before building the type and calling set_die_type. | |
e71ec853 | 19313 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
19314 | possible before fetching more types to complete the current type. |
19315 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 19316 | |
f792889a | 19317 | static struct type * |
1c379e20 DJ |
19318 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
19319 | { | |
dee91e82 | 19320 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 19321 | struct objfile *objfile = cu->objfile; |
1c379e20 | 19322 | |
b4ba55a1 JB |
19323 | /* For Ada types, make sure that the gnat-specific data is always |
19324 | initialized (if not already set). There are a few types where | |
19325 | we should not be doing so, because the type-specific area is | |
19326 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
19327 | where the type-specific area is used to store the floatformat). | |
19328 | But this is not a problem, because the gnat-specific information | |
19329 | is actually not needed for these types. */ | |
19330 | if (need_gnat_info (cu) | |
19331 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
19332 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
19333 | && !HAVE_GNAT_AUX_INFO (type)) | |
19334 | INIT_GNAT_SPECIFIC (type); | |
19335 | ||
dee91e82 | 19336 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19337 | { |
dee91e82 DE |
19338 | dwarf2_per_objfile->die_type_hash = |
19339 | htab_create_alloc_ex (127, | |
19340 | per_cu_offset_and_type_hash, | |
19341 | per_cu_offset_and_type_eq, | |
19342 | NULL, | |
19343 | &objfile->objfile_obstack, | |
19344 | hashtab_obstack_allocate, | |
19345 | dummy_obstack_deallocate); | |
f792889a | 19346 | } |
1c379e20 | 19347 | |
dee91e82 | 19348 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
19349 | ofs.offset = die->offset; |
19350 | ofs.type = type; | |
dee91e82 DE |
19351 | slot = (struct dwarf2_per_cu_offset_and_type **) |
19352 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
19353 | if (*slot) |
19354 | complaint (&symfile_complaints, | |
19355 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 19356 | die->offset.sect_off); |
673bfd45 | 19357 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 19358 | **slot = ofs; |
f792889a | 19359 | return type; |
1c379e20 DJ |
19360 | } |
19361 | ||
380bca97 | 19362 | /* Look up the type for the die at OFFSET in the appropriate type_hash |
673bfd45 | 19363 | table, or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
19364 | |
19365 | static struct type * | |
b64f50a1 | 19366 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 19367 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 19368 | { |
dee91e82 | 19369 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 19370 | |
dee91e82 | 19371 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19372 | return NULL; |
1c379e20 | 19373 | |
dee91e82 | 19374 | ofs.per_cu = per_cu; |
673bfd45 | 19375 | ofs.offset = offset; |
dee91e82 | 19376 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
19377 | if (slot) |
19378 | return slot->type; | |
19379 | else | |
19380 | return NULL; | |
19381 | } | |
19382 | ||
673bfd45 DE |
19383 | /* Look up the type for DIE in the appropriate type_hash table, |
19384 | or return NULL if DIE does not have a saved type. */ | |
19385 | ||
19386 | static struct type * | |
19387 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
19388 | { | |
19389 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
19390 | } | |
19391 | ||
10b3939b DJ |
19392 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
19393 | ||
19394 | static void | |
19395 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
19396 | struct dwarf2_per_cu_data *ref_per_cu) | |
19397 | { | |
19398 | void **slot; | |
19399 | ||
19400 | if (cu->dependencies == NULL) | |
19401 | cu->dependencies | |
19402 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
19403 | NULL, &cu->comp_unit_obstack, | |
19404 | hashtab_obstack_allocate, | |
19405 | dummy_obstack_deallocate); | |
19406 | ||
19407 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
19408 | if (*slot == NULL) | |
19409 | *slot = ref_per_cu; | |
19410 | } | |
1c379e20 | 19411 | |
f504f079 DE |
19412 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
19413 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
19414 | cache that we must keep because we are keeping CU. */ |
19415 | ||
10b3939b DJ |
19416 | static int |
19417 | dwarf2_mark_helper (void **slot, void *data) | |
19418 | { | |
19419 | struct dwarf2_per_cu_data *per_cu; | |
19420 | ||
19421 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
19422 | |
19423 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
19424 | reading of the chain. As such dependencies remain valid it is not much | |
19425 | useful to track and undo them during QUIT cleanups. */ | |
19426 | if (per_cu->cu == NULL) | |
19427 | return 1; | |
19428 | ||
10b3939b DJ |
19429 | if (per_cu->cu->mark) |
19430 | return 1; | |
19431 | per_cu->cu->mark = 1; | |
19432 | ||
19433 | if (per_cu->cu->dependencies != NULL) | |
19434 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
19435 | ||
19436 | return 1; | |
19437 | } | |
19438 | ||
f504f079 DE |
19439 | /* Set the mark field in CU and in every other compilation unit in the |
19440 | cache that we must keep because we are keeping CU. */ | |
19441 | ||
ae038cb0 DJ |
19442 | static void |
19443 | dwarf2_mark (struct dwarf2_cu *cu) | |
19444 | { | |
19445 | if (cu->mark) | |
19446 | return; | |
19447 | cu->mark = 1; | |
10b3939b DJ |
19448 | if (cu->dependencies != NULL) |
19449 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
19450 | } |
19451 | ||
19452 | static void | |
19453 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
19454 | { | |
19455 | while (per_cu) | |
19456 | { | |
19457 | per_cu->cu->mark = 0; | |
19458 | per_cu = per_cu->cu->read_in_chain; | |
19459 | } | |
72bf9492 DJ |
19460 | } |
19461 | ||
72bf9492 DJ |
19462 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
19463 | is its offset in .debug_info for this objfile. */ | |
19464 | ||
19465 | static hashval_t | |
19466 | partial_die_hash (const void *item) | |
19467 | { | |
19468 | const struct partial_die_info *part_die = item; | |
9a619af0 | 19469 | |
b64f50a1 | 19470 | return part_die->offset.sect_off; |
72bf9492 DJ |
19471 | } |
19472 | ||
19473 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
19474 | are equal if they have the same offset. */ | |
19475 | ||
19476 | static int | |
19477 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
19478 | { | |
19479 | const struct partial_die_info *part_die_lhs = item_lhs; | |
19480 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 19481 | |
b64f50a1 | 19482 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
19483 | } |
19484 | ||
ae038cb0 DJ |
19485 | static struct cmd_list_element *set_dwarf2_cmdlist; |
19486 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
19487 | ||
19488 | static void | |
19489 | set_dwarf2_cmd (char *args, int from_tty) | |
19490 | { | |
19491 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
19492 | } | |
19493 | ||
19494 | static void | |
19495 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 19496 | { |
ae038cb0 DJ |
19497 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
19498 | } | |
19499 | ||
4bf44c1c | 19500 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
19501 | |
19502 | static void | |
c1bd65d0 | 19503 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
19504 | { |
19505 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 19506 | int ix; |
8b70b953 | 19507 | |
95554aad TT |
19508 | for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix) |
19509 | VEC_free (dwarf2_per_cu_ptr, | |
f4dc4d17 | 19510 | dwarf2_per_objfile->all_comp_units[ix]->s.imported_symtabs); |
95554aad | 19511 | |
8b70b953 | 19512 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
19513 | |
19514 | if (data->dwo_files) | |
19515 | free_dwo_files (data->dwo_files, objfile); | |
36586728 TT |
19516 | |
19517 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
19518 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
19519 | } |
19520 | ||
19521 | \f | |
ae2de4f8 | 19522 | /* The "save gdb-index" command. */ |
9291a0cd TT |
19523 | |
19524 | /* The contents of the hash table we create when building the string | |
19525 | table. */ | |
19526 | struct strtab_entry | |
19527 | { | |
19528 | offset_type offset; | |
19529 | const char *str; | |
19530 | }; | |
19531 | ||
559a7a62 JK |
19532 | /* Hash function for a strtab_entry. |
19533 | ||
19534 | Function is used only during write_hash_table so no index format backward | |
19535 | compatibility is needed. */ | |
b89be57b | 19536 | |
9291a0cd TT |
19537 | static hashval_t |
19538 | hash_strtab_entry (const void *e) | |
19539 | { | |
19540 | const struct strtab_entry *entry = e; | |
559a7a62 | 19541 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
19542 | } |
19543 | ||
19544 | /* Equality function for a strtab_entry. */ | |
b89be57b | 19545 | |
9291a0cd TT |
19546 | static int |
19547 | eq_strtab_entry (const void *a, const void *b) | |
19548 | { | |
19549 | const struct strtab_entry *ea = a; | |
19550 | const struct strtab_entry *eb = b; | |
19551 | return !strcmp (ea->str, eb->str); | |
19552 | } | |
19553 | ||
19554 | /* Create a strtab_entry hash table. */ | |
b89be57b | 19555 | |
9291a0cd TT |
19556 | static htab_t |
19557 | create_strtab (void) | |
19558 | { | |
19559 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
19560 | xfree, xcalloc, xfree); | |
19561 | } | |
19562 | ||
19563 | /* Add a string to the constant pool. Return the string's offset in | |
19564 | host order. */ | |
b89be57b | 19565 | |
9291a0cd TT |
19566 | static offset_type |
19567 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
19568 | { | |
19569 | void **slot; | |
19570 | struct strtab_entry entry; | |
19571 | struct strtab_entry *result; | |
19572 | ||
19573 | entry.str = str; | |
19574 | slot = htab_find_slot (table, &entry, INSERT); | |
19575 | if (*slot) | |
19576 | result = *slot; | |
19577 | else | |
19578 | { | |
19579 | result = XNEW (struct strtab_entry); | |
19580 | result->offset = obstack_object_size (cpool); | |
19581 | result->str = str; | |
19582 | obstack_grow_str0 (cpool, str); | |
19583 | *slot = result; | |
19584 | } | |
19585 | return result->offset; | |
19586 | } | |
19587 | ||
19588 | /* An entry in the symbol table. */ | |
19589 | struct symtab_index_entry | |
19590 | { | |
19591 | /* The name of the symbol. */ | |
19592 | const char *name; | |
19593 | /* The offset of the name in the constant pool. */ | |
19594 | offset_type index_offset; | |
19595 | /* A sorted vector of the indices of all the CUs that hold an object | |
19596 | of this name. */ | |
19597 | VEC (offset_type) *cu_indices; | |
19598 | }; | |
19599 | ||
19600 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
19601 | struct mapped_symtab | |
19602 | { | |
19603 | offset_type n_elements; | |
19604 | offset_type size; | |
19605 | struct symtab_index_entry **data; | |
19606 | }; | |
19607 | ||
19608 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 19609 | |
9291a0cd TT |
19610 | static hashval_t |
19611 | hash_symtab_entry (const void *e) | |
19612 | { | |
19613 | const struct symtab_index_entry *entry = e; | |
19614 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
19615 | sizeof (offset_type) * VEC_length (offset_type, | |
19616 | entry->cu_indices), | |
19617 | 0); | |
19618 | } | |
19619 | ||
19620 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 19621 | |
9291a0cd TT |
19622 | static int |
19623 | eq_symtab_entry (const void *a, const void *b) | |
19624 | { | |
19625 | const struct symtab_index_entry *ea = a; | |
19626 | const struct symtab_index_entry *eb = b; | |
19627 | int len = VEC_length (offset_type, ea->cu_indices); | |
19628 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
19629 | return 0; | |
19630 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
19631 | VEC_address (offset_type, eb->cu_indices), | |
19632 | sizeof (offset_type) * len); | |
19633 | } | |
19634 | ||
19635 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 19636 | |
9291a0cd TT |
19637 | static void |
19638 | delete_symtab_entry (void *p) | |
19639 | { | |
19640 | struct symtab_index_entry *entry = p; | |
19641 | VEC_free (offset_type, entry->cu_indices); | |
19642 | xfree (entry); | |
19643 | } | |
19644 | ||
19645 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 19646 | |
9291a0cd | 19647 | static htab_t |
3876f04e | 19648 | create_symbol_hash_table (void) |
9291a0cd TT |
19649 | { |
19650 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
19651 | delete_symtab_entry, xcalloc, xfree); | |
19652 | } | |
19653 | ||
19654 | /* Create a new mapped symtab object. */ | |
b89be57b | 19655 | |
9291a0cd TT |
19656 | static struct mapped_symtab * |
19657 | create_mapped_symtab (void) | |
19658 | { | |
19659 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
19660 | symtab->n_elements = 0; | |
19661 | symtab->size = 1024; | |
19662 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
19663 | return symtab; | |
19664 | } | |
19665 | ||
19666 | /* Destroy a mapped_symtab. */ | |
b89be57b | 19667 | |
9291a0cd TT |
19668 | static void |
19669 | cleanup_mapped_symtab (void *p) | |
19670 | { | |
19671 | struct mapped_symtab *symtab = p; | |
19672 | /* The contents of the array are freed when the other hash table is | |
19673 | destroyed. */ | |
19674 | xfree (symtab->data); | |
19675 | xfree (symtab); | |
19676 | } | |
19677 | ||
19678 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
19679 | the slot. |
19680 | ||
19681 | Function is used only during write_hash_table so no index format backward | |
19682 | compatibility is needed. */ | |
b89be57b | 19683 | |
9291a0cd TT |
19684 | static struct symtab_index_entry ** |
19685 | find_slot (struct mapped_symtab *symtab, const char *name) | |
19686 | { | |
559a7a62 | 19687 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
19688 | |
19689 | index = hash & (symtab->size - 1); | |
19690 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
19691 | ||
19692 | for (;;) | |
19693 | { | |
19694 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
19695 | return &symtab->data[index]; | |
19696 | index = (index + step) & (symtab->size - 1); | |
19697 | } | |
19698 | } | |
19699 | ||
19700 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 19701 | |
9291a0cd TT |
19702 | static void |
19703 | hash_expand (struct mapped_symtab *symtab) | |
19704 | { | |
19705 | offset_type old_size = symtab->size; | |
19706 | offset_type i; | |
19707 | struct symtab_index_entry **old_entries = symtab->data; | |
19708 | ||
19709 | symtab->size *= 2; | |
19710 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
19711 | ||
19712 | for (i = 0; i < old_size; ++i) | |
19713 | { | |
19714 | if (old_entries[i]) | |
19715 | { | |
19716 | struct symtab_index_entry **slot = find_slot (symtab, | |
19717 | old_entries[i]->name); | |
19718 | *slot = old_entries[i]; | |
19719 | } | |
19720 | } | |
19721 | ||
19722 | xfree (old_entries); | |
19723 | } | |
19724 | ||
156942c7 DE |
19725 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
19726 | CU_INDEX is the index of the CU in which the symbol appears. | |
19727 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 19728 | |
9291a0cd TT |
19729 | static void |
19730 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 19731 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
19732 | offset_type cu_index) |
19733 | { | |
19734 | struct symtab_index_entry **slot; | |
156942c7 | 19735 | offset_type cu_index_and_attrs; |
9291a0cd TT |
19736 | |
19737 | ++symtab->n_elements; | |
19738 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
19739 | hash_expand (symtab); | |
19740 | ||
19741 | slot = find_slot (symtab, name); | |
19742 | if (!*slot) | |
19743 | { | |
19744 | *slot = XNEW (struct symtab_index_entry); | |
19745 | (*slot)->name = name; | |
156942c7 | 19746 | /* index_offset is set later. */ |
9291a0cd TT |
19747 | (*slot)->cu_indices = NULL; |
19748 | } | |
156942c7 DE |
19749 | |
19750 | cu_index_and_attrs = 0; | |
19751 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
19752 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
19753 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
19754 | ||
19755 | /* We don't want to record an index value twice as we want to avoid the | |
19756 | duplication. | |
19757 | We process all global symbols and then all static symbols | |
19758 | (which would allow us to avoid the duplication by only having to check | |
19759 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
19760 | To keep things simple we don't worry about the duplication here and | |
19761 | sort and uniqufy the list after we've processed all symbols. */ | |
19762 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
19763 | } | |
19764 | ||
19765 | /* qsort helper routine for uniquify_cu_indices. */ | |
19766 | ||
19767 | static int | |
19768 | offset_type_compare (const void *ap, const void *bp) | |
19769 | { | |
19770 | offset_type a = *(offset_type *) ap; | |
19771 | offset_type b = *(offset_type *) bp; | |
19772 | ||
19773 | return (a > b) - (b > a); | |
19774 | } | |
19775 | ||
19776 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
19777 | ||
19778 | static void | |
19779 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
19780 | { | |
19781 | int i; | |
19782 | ||
19783 | for (i = 0; i < symtab->size; ++i) | |
19784 | { | |
19785 | struct symtab_index_entry *entry = symtab->data[i]; | |
19786 | ||
19787 | if (entry | |
19788 | && entry->cu_indices != NULL) | |
19789 | { | |
19790 | unsigned int next_to_insert, next_to_check; | |
19791 | offset_type last_value; | |
19792 | ||
19793 | qsort (VEC_address (offset_type, entry->cu_indices), | |
19794 | VEC_length (offset_type, entry->cu_indices), | |
19795 | sizeof (offset_type), offset_type_compare); | |
19796 | ||
19797 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
19798 | next_to_insert = 1; | |
19799 | for (next_to_check = 1; | |
19800 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
19801 | ++next_to_check) | |
19802 | { | |
19803 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
19804 | != last_value) | |
19805 | { | |
19806 | last_value = VEC_index (offset_type, entry->cu_indices, | |
19807 | next_to_check); | |
19808 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
19809 | last_value); | |
19810 | ++next_to_insert; | |
19811 | } | |
19812 | } | |
19813 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
19814 | } | |
19815 | } | |
9291a0cd TT |
19816 | } |
19817 | ||
19818 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 19819 | |
9291a0cd | 19820 | static offset_type |
3876f04e | 19821 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
19822 | struct symtab_index_entry *entry) |
19823 | { | |
19824 | void **slot; | |
19825 | ||
3876f04e | 19826 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
19827 | if (!*slot) |
19828 | { | |
19829 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
19830 | offset_type val = MAYBE_SWAP (len); | |
19831 | offset_type iter; | |
19832 | int i; | |
19833 | ||
19834 | *slot = entry; | |
19835 | entry->index_offset = obstack_object_size (cpool); | |
19836 | ||
19837 | obstack_grow (cpool, &val, sizeof (val)); | |
19838 | for (i = 0; | |
19839 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
19840 | ++i) | |
19841 | { | |
19842 | val = MAYBE_SWAP (iter); | |
19843 | obstack_grow (cpool, &val, sizeof (val)); | |
19844 | } | |
19845 | } | |
19846 | else | |
19847 | { | |
19848 | struct symtab_index_entry *old_entry = *slot; | |
19849 | entry->index_offset = old_entry->index_offset; | |
19850 | entry = old_entry; | |
19851 | } | |
19852 | return entry->index_offset; | |
19853 | } | |
19854 | ||
19855 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
19856 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 19857 | |
9291a0cd TT |
19858 | static void |
19859 | write_hash_table (struct mapped_symtab *symtab, | |
19860 | struct obstack *output, struct obstack *cpool) | |
19861 | { | |
19862 | offset_type i; | |
3876f04e | 19863 | htab_t symbol_hash_table; |
9291a0cd TT |
19864 | htab_t str_table; |
19865 | ||
3876f04e | 19866 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 19867 | str_table = create_strtab (); |
3876f04e | 19868 | |
9291a0cd TT |
19869 | /* We add all the index vectors to the constant pool first, to |
19870 | ensure alignment is ok. */ | |
19871 | for (i = 0; i < symtab->size; ++i) | |
19872 | { | |
19873 | if (symtab->data[i]) | |
3876f04e | 19874 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
19875 | } |
19876 | ||
19877 | /* Now write out the hash table. */ | |
19878 | for (i = 0; i < symtab->size; ++i) | |
19879 | { | |
19880 | offset_type str_off, vec_off; | |
19881 | ||
19882 | if (symtab->data[i]) | |
19883 | { | |
19884 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
19885 | vec_off = symtab->data[i]->index_offset; | |
19886 | } | |
19887 | else | |
19888 | { | |
19889 | /* While 0 is a valid constant pool index, it is not valid | |
19890 | to have 0 for both offsets. */ | |
19891 | str_off = 0; | |
19892 | vec_off = 0; | |
19893 | } | |
19894 | ||
19895 | str_off = MAYBE_SWAP (str_off); | |
19896 | vec_off = MAYBE_SWAP (vec_off); | |
19897 | ||
19898 | obstack_grow (output, &str_off, sizeof (str_off)); | |
19899 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
19900 | } | |
19901 | ||
19902 | htab_delete (str_table); | |
3876f04e | 19903 | htab_delete (symbol_hash_table); |
9291a0cd TT |
19904 | } |
19905 | ||
0a5429f6 DE |
19906 | /* Struct to map psymtab to CU index in the index file. */ |
19907 | struct psymtab_cu_index_map | |
19908 | { | |
19909 | struct partial_symtab *psymtab; | |
19910 | unsigned int cu_index; | |
19911 | }; | |
19912 | ||
19913 | static hashval_t | |
19914 | hash_psymtab_cu_index (const void *item) | |
19915 | { | |
19916 | const struct psymtab_cu_index_map *map = item; | |
19917 | ||
19918 | return htab_hash_pointer (map->psymtab); | |
19919 | } | |
19920 | ||
19921 | static int | |
19922 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
19923 | { | |
19924 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
19925 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
19926 | ||
19927 | return lhs->psymtab == rhs->psymtab; | |
19928 | } | |
19929 | ||
19930 | /* Helper struct for building the address table. */ | |
19931 | struct addrmap_index_data | |
19932 | { | |
19933 | struct objfile *objfile; | |
19934 | struct obstack *addr_obstack; | |
19935 | htab_t cu_index_htab; | |
19936 | ||
19937 | /* Non-zero if the previous_* fields are valid. | |
19938 | We can't write an entry until we see the next entry (since it is only then | |
19939 | that we know the end of the entry). */ | |
19940 | int previous_valid; | |
19941 | /* Index of the CU in the table of all CUs in the index file. */ | |
19942 | unsigned int previous_cu_index; | |
0963b4bd | 19943 | /* Start address of the CU. */ |
0a5429f6 DE |
19944 | CORE_ADDR previous_cu_start; |
19945 | }; | |
19946 | ||
19947 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 19948 | |
9291a0cd | 19949 | static void |
0a5429f6 DE |
19950 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
19951 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 19952 | { |
0a5429f6 | 19953 | offset_type cu_index_to_write; |
9291a0cd TT |
19954 | char addr[8]; |
19955 | CORE_ADDR baseaddr; | |
19956 | ||
19957 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
19958 | ||
0a5429f6 DE |
19959 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
19960 | obstack_grow (obstack, addr, 8); | |
19961 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
19962 | obstack_grow (obstack, addr, 8); | |
19963 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
19964 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
19965 | } | |
19966 | ||
19967 | /* Worker function for traversing an addrmap to build the address table. */ | |
19968 | ||
19969 | static int | |
19970 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
19971 | { | |
19972 | struct addrmap_index_data *data = datap; | |
19973 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
19974 | |
19975 | if (data->previous_valid) | |
19976 | add_address_entry (data->objfile, data->addr_obstack, | |
19977 | data->previous_cu_start, start_addr, | |
19978 | data->previous_cu_index); | |
19979 | ||
19980 | data->previous_cu_start = start_addr; | |
19981 | if (pst != NULL) | |
19982 | { | |
19983 | struct psymtab_cu_index_map find_map, *map; | |
19984 | find_map.psymtab = pst; | |
19985 | map = htab_find (data->cu_index_htab, &find_map); | |
19986 | gdb_assert (map != NULL); | |
19987 | data->previous_cu_index = map->cu_index; | |
19988 | data->previous_valid = 1; | |
19989 | } | |
19990 | else | |
19991 | data->previous_valid = 0; | |
19992 | ||
19993 | return 0; | |
19994 | } | |
19995 | ||
19996 | /* Write OBJFILE's address map to OBSTACK. | |
19997 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
19998 | in the index file. */ | |
19999 | ||
20000 | static void | |
20001 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
20002 | htab_t cu_index_htab) | |
20003 | { | |
20004 | struct addrmap_index_data addrmap_index_data; | |
20005 | ||
20006 | /* When writing the address table, we have to cope with the fact that | |
20007 | the addrmap iterator only provides the start of a region; we have to | |
20008 | wait until the next invocation to get the start of the next region. */ | |
20009 | ||
20010 | addrmap_index_data.objfile = objfile; | |
20011 | addrmap_index_data.addr_obstack = obstack; | |
20012 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
20013 | addrmap_index_data.previous_valid = 0; | |
20014 | ||
20015 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
20016 | &addrmap_index_data); | |
20017 | ||
20018 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
20019 | is valid, but we should still handle it. | |
20020 | The end address is recorded as the start of the next region, but that | |
20021 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
20022 | anyway. */ | |
20023 | if (addrmap_index_data.previous_valid) | |
20024 | add_address_entry (objfile, obstack, | |
20025 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
20026 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
20027 | } |
20028 | ||
156942c7 DE |
20029 | /* Return the symbol kind of PSYM. */ |
20030 | ||
20031 | static gdb_index_symbol_kind | |
20032 | symbol_kind (struct partial_symbol *psym) | |
20033 | { | |
20034 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
20035 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
20036 | ||
20037 | switch (domain) | |
20038 | { | |
20039 | case VAR_DOMAIN: | |
20040 | switch (aclass) | |
20041 | { | |
20042 | case LOC_BLOCK: | |
20043 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
20044 | case LOC_TYPEDEF: | |
20045 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20046 | case LOC_COMPUTED: | |
20047 | case LOC_CONST_BYTES: | |
20048 | case LOC_OPTIMIZED_OUT: | |
20049 | case LOC_STATIC: | |
20050 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20051 | case LOC_CONST: | |
20052 | /* Note: It's currently impossible to recognize psyms as enum values | |
20053 | short of reading the type info. For now punt. */ | |
20054 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20055 | default: | |
20056 | /* There are other LOC_FOO values that one might want to classify | |
20057 | as variables, but dwarf2read.c doesn't currently use them. */ | |
20058 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20059 | } | |
20060 | case STRUCT_DOMAIN: | |
20061 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20062 | default: | |
20063 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20064 | } | |
20065 | } | |
20066 | ||
9291a0cd | 20067 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 20068 | |
9291a0cd TT |
20069 | static void |
20070 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 20071 | htab_t psyms_seen, |
9291a0cd TT |
20072 | struct partial_symbol **psymp, |
20073 | int count, | |
987d643c TT |
20074 | offset_type cu_index, |
20075 | int is_static) | |
9291a0cd TT |
20076 | { |
20077 | for (; count-- > 0; ++psymp) | |
20078 | { | |
156942c7 DE |
20079 | struct partial_symbol *psym = *psymp; |
20080 | void **slot; | |
987d643c | 20081 | |
156942c7 | 20082 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 20083 | error (_("Ada is not currently supported by the index")); |
987d643c | 20084 | |
987d643c | 20085 | /* Only add a given psymbol once. */ |
156942c7 | 20086 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
20087 | if (!*slot) |
20088 | { | |
156942c7 DE |
20089 | gdb_index_symbol_kind kind = symbol_kind (psym); |
20090 | ||
20091 | *slot = psym; | |
20092 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
20093 | is_static, kind, cu_index); | |
987d643c | 20094 | } |
9291a0cd TT |
20095 | } |
20096 | } | |
20097 | ||
20098 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
20099 | exception if there is an error. */ | |
b89be57b | 20100 | |
9291a0cd TT |
20101 | static void |
20102 | write_obstack (FILE *file, struct obstack *obstack) | |
20103 | { | |
20104 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
20105 | file) | |
20106 | != obstack_object_size (obstack)) | |
20107 | error (_("couldn't data write to file")); | |
20108 | } | |
20109 | ||
20110 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 20111 | |
9291a0cd TT |
20112 | static void |
20113 | unlink_if_set (void *p) | |
20114 | { | |
20115 | char **filename = p; | |
20116 | if (*filename) | |
20117 | unlink (*filename); | |
20118 | } | |
20119 | ||
1fd400ff TT |
20120 | /* A helper struct used when iterating over debug_types. */ |
20121 | struct signatured_type_index_data | |
20122 | { | |
20123 | struct objfile *objfile; | |
20124 | struct mapped_symtab *symtab; | |
20125 | struct obstack *types_list; | |
987d643c | 20126 | htab_t psyms_seen; |
1fd400ff TT |
20127 | int cu_index; |
20128 | }; | |
20129 | ||
20130 | /* A helper function that writes a single signatured_type to an | |
20131 | obstack. */ | |
b89be57b | 20132 | |
1fd400ff TT |
20133 | static int |
20134 | write_one_signatured_type (void **slot, void *d) | |
20135 | { | |
20136 | struct signatured_type_index_data *info = d; | |
20137 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
e254ef6a DE |
20138 | struct dwarf2_per_cu_data *per_cu = &entry->per_cu; |
20139 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
1fd400ff TT |
20140 | gdb_byte val[8]; |
20141 | ||
20142 | write_psymbols (info->symtab, | |
987d643c | 20143 | info->psyms_seen, |
3e43a32a MS |
20144 | info->objfile->global_psymbols.list |
20145 | + psymtab->globals_offset, | |
987d643c TT |
20146 | psymtab->n_global_syms, info->cu_index, |
20147 | 0); | |
1fd400ff | 20148 | write_psymbols (info->symtab, |
987d643c | 20149 | info->psyms_seen, |
3e43a32a MS |
20150 | info->objfile->static_psymbols.list |
20151 | + psymtab->statics_offset, | |
987d643c TT |
20152 | psymtab->n_static_syms, info->cu_index, |
20153 | 1); | |
1fd400ff | 20154 | |
b64f50a1 JK |
20155 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20156 | entry->per_cu.offset.sect_off); | |
1fd400ff | 20157 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
20158 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20159 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
20160 | obstack_grow (info->types_list, val, 8); |
20161 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
20162 | obstack_grow (info->types_list, val, 8); | |
20163 | ||
20164 | ++info->cu_index; | |
20165 | ||
20166 | return 1; | |
20167 | } | |
20168 | ||
95554aad TT |
20169 | /* Recurse into all "included" dependencies and write their symbols as |
20170 | if they appeared in this psymtab. */ | |
20171 | ||
20172 | static void | |
20173 | recursively_write_psymbols (struct objfile *objfile, | |
20174 | struct partial_symtab *psymtab, | |
20175 | struct mapped_symtab *symtab, | |
20176 | htab_t psyms_seen, | |
20177 | offset_type cu_index) | |
20178 | { | |
20179 | int i; | |
20180 | ||
20181 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
20182 | if (psymtab->dependencies[i]->user != NULL) | |
20183 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
20184 | symtab, psyms_seen, cu_index); | |
20185 | ||
20186 | write_psymbols (symtab, | |
20187 | psyms_seen, | |
20188 | objfile->global_psymbols.list + psymtab->globals_offset, | |
20189 | psymtab->n_global_syms, cu_index, | |
20190 | 0); | |
20191 | write_psymbols (symtab, | |
20192 | psyms_seen, | |
20193 | objfile->static_psymbols.list + psymtab->statics_offset, | |
20194 | psymtab->n_static_syms, cu_index, | |
20195 | 1); | |
20196 | } | |
20197 | ||
9291a0cd | 20198 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 20199 | |
9291a0cd TT |
20200 | static void |
20201 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
20202 | { | |
20203 | struct cleanup *cleanup; | |
20204 | char *filename, *cleanup_filename; | |
1fd400ff TT |
20205 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
20206 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
20207 | int i; |
20208 | FILE *out_file; | |
20209 | struct mapped_symtab *symtab; | |
20210 | offset_type val, size_of_contents, total_len; | |
20211 | struct stat st; | |
987d643c | 20212 | htab_t psyms_seen; |
0a5429f6 DE |
20213 | htab_t cu_index_htab; |
20214 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 20215 | |
b4f2f049 | 20216 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
9291a0cd | 20217 | return; |
b4f2f049 | 20218 | |
9291a0cd TT |
20219 | if (dwarf2_per_objfile->using_index) |
20220 | error (_("Cannot use an index to create the index")); | |
20221 | ||
8b70b953 TT |
20222 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
20223 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
20224 | ||
9291a0cd | 20225 | if (stat (objfile->name, &st) < 0) |
7e17e088 | 20226 | perror_with_name (objfile->name); |
9291a0cd TT |
20227 | |
20228 | filename = concat (dir, SLASH_STRING, lbasename (objfile->name), | |
20229 | INDEX_SUFFIX, (char *) NULL); | |
20230 | cleanup = make_cleanup (xfree, filename); | |
20231 | ||
20232 | out_file = fopen (filename, "wb"); | |
20233 | if (!out_file) | |
20234 | error (_("Can't open `%s' for writing"), filename); | |
20235 | ||
20236 | cleanup_filename = filename; | |
20237 | make_cleanup (unlink_if_set, &cleanup_filename); | |
20238 | ||
20239 | symtab = create_mapped_symtab (); | |
20240 | make_cleanup (cleanup_mapped_symtab, symtab); | |
20241 | ||
20242 | obstack_init (&addr_obstack); | |
20243 | make_cleanup_obstack_free (&addr_obstack); | |
20244 | ||
20245 | obstack_init (&cu_list); | |
20246 | make_cleanup_obstack_free (&cu_list); | |
20247 | ||
1fd400ff TT |
20248 | obstack_init (&types_cu_list); |
20249 | make_cleanup_obstack_free (&types_cu_list); | |
20250 | ||
987d643c TT |
20251 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
20252 | NULL, xcalloc, xfree); | |
96408a79 | 20253 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 20254 | |
0a5429f6 DE |
20255 | /* While we're scanning CU's create a table that maps a psymtab pointer |
20256 | (which is what addrmap records) to its index (which is what is recorded | |
20257 | in the index file). This will later be needed to write the address | |
20258 | table. */ | |
20259 | cu_index_htab = htab_create_alloc (100, | |
20260 | hash_psymtab_cu_index, | |
20261 | eq_psymtab_cu_index, | |
20262 | NULL, xcalloc, xfree); | |
96408a79 | 20263 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
20264 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
20265 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
20266 | * dwarf2_per_objfile->n_comp_units); | |
20267 | make_cleanup (xfree, psymtab_cu_index_map); | |
20268 | ||
20269 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
20270 | work here. Also, the debug_types entries do not appear in |
20271 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
20272 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
20273 | { | |
3e43a32a MS |
20274 | struct dwarf2_per_cu_data *per_cu |
20275 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 20276 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 20277 | gdb_byte val[8]; |
0a5429f6 DE |
20278 | struct psymtab_cu_index_map *map; |
20279 | void **slot; | |
9291a0cd | 20280 | |
95554aad TT |
20281 | if (psymtab->user == NULL) |
20282 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 20283 | |
0a5429f6 DE |
20284 | map = &psymtab_cu_index_map[i]; |
20285 | map->psymtab = psymtab; | |
20286 | map->cu_index = i; | |
20287 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
20288 | gdb_assert (slot != NULL); | |
20289 | gdb_assert (*slot == NULL); | |
20290 | *slot = map; | |
9291a0cd | 20291 | |
b64f50a1 JK |
20292 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20293 | per_cu->offset.sect_off); | |
9291a0cd | 20294 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 20295 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
20296 | obstack_grow (&cu_list, val, 8); |
20297 | } | |
20298 | ||
0a5429f6 DE |
20299 | /* Dump the address map. */ |
20300 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
20301 | ||
1fd400ff TT |
20302 | /* Write out the .debug_type entries, if any. */ |
20303 | if (dwarf2_per_objfile->signatured_types) | |
20304 | { | |
20305 | struct signatured_type_index_data sig_data; | |
20306 | ||
20307 | sig_data.objfile = objfile; | |
20308 | sig_data.symtab = symtab; | |
20309 | sig_data.types_list = &types_cu_list; | |
987d643c | 20310 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
20311 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
20312 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
20313 | write_one_signatured_type, &sig_data); | |
20314 | } | |
20315 | ||
156942c7 DE |
20316 | /* Now that we've processed all symbols we can shrink their cu_indices |
20317 | lists. */ | |
20318 | uniquify_cu_indices (symtab); | |
20319 | ||
9291a0cd TT |
20320 | obstack_init (&constant_pool); |
20321 | make_cleanup_obstack_free (&constant_pool); | |
20322 | obstack_init (&symtab_obstack); | |
20323 | make_cleanup_obstack_free (&symtab_obstack); | |
20324 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
20325 | ||
20326 | obstack_init (&contents); | |
20327 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 20328 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
20329 | total_len = size_of_contents; |
20330 | ||
20331 | /* The version number. */ | |
156942c7 | 20332 | val = MAYBE_SWAP (7); |
9291a0cd TT |
20333 | obstack_grow (&contents, &val, sizeof (val)); |
20334 | ||
20335 | /* The offset of the CU list from the start of the file. */ | |
20336 | val = MAYBE_SWAP (total_len); | |
20337 | obstack_grow (&contents, &val, sizeof (val)); | |
20338 | total_len += obstack_object_size (&cu_list); | |
20339 | ||
1fd400ff TT |
20340 | /* The offset of the types CU list from the start of the file. */ |
20341 | val = MAYBE_SWAP (total_len); | |
20342 | obstack_grow (&contents, &val, sizeof (val)); | |
20343 | total_len += obstack_object_size (&types_cu_list); | |
20344 | ||
9291a0cd TT |
20345 | /* The offset of the address table from the start of the file. */ |
20346 | val = MAYBE_SWAP (total_len); | |
20347 | obstack_grow (&contents, &val, sizeof (val)); | |
20348 | total_len += obstack_object_size (&addr_obstack); | |
20349 | ||
20350 | /* The offset of the symbol table from the start of the file. */ | |
20351 | val = MAYBE_SWAP (total_len); | |
20352 | obstack_grow (&contents, &val, sizeof (val)); | |
20353 | total_len += obstack_object_size (&symtab_obstack); | |
20354 | ||
20355 | /* The offset of the constant pool from the start of the file. */ | |
20356 | val = MAYBE_SWAP (total_len); | |
20357 | obstack_grow (&contents, &val, sizeof (val)); | |
20358 | total_len += obstack_object_size (&constant_pool); | |
20359 | ||
20360 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
20361 | ||
20362 | write_obstack (out_file, &contents); | |
20363 | write_obstack (out_file, &cu_list); | |
1fd400ff | 20364 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
20365 | write_obstack (out_file, &addr_obstack); |
20366 | write_obstack (out_file, &symtab_obstack); | |
20367 | write_obstack (out_file, &constant_pool); | |
20368 | ||
20369 | fclose (out_file); | |
20370 | ||
20371 | /* We want to keep the file, so we set cleanup_filename to NULL | |
20372 | here. See unlink_if_set. */ | |
20373 | cleanup_filename = NULL; | |
20374 | ||
20375 | do_cleanups (cleanup); | |
20376 | } | |
20377 | ||
90476074 TT |
20378 | /* Implementation of the `save gdb-index' command. |
20379 | ||
20380 | Note that the file format used by this command is documented in the | |
20381 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 20382 | |
9291a0cd TT |
20383 | static void |
20384 | save_gdb_index_command (char *arg, int from_tty) | |
20385 | { | |
20386 | struct objfile *objfile; | |
20387 | ||
20388 | if (!arg || !*arg) | |
96d19272 | 20389 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
20390 | |
20391 | ALL_OBJFILES (objfile) | |
20392 | { | |
20393 | struct stat st; | |
20394 | ||
20395 | /* If the objfile does not correspond to an actual file, skip it. */ | |
20396 | if (stat (objfile->name, &st) < 0) | |
20397 | continue; | |
20398 | ||
20399 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
20400 | if (dwarf2_per_objfile) | |
20401 | { | |
20402 | volatile struct gdb_exception except; | |
20403 | ||
20404 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
20405 | { | |
20406 | write_psymtabs_to_index (objfile, arg); | |
20407 | } | |
20408 | if (except.reason < 0) | |
20409 | exception_fprintf (gdb_stderr, except, | |
20410 | _("Error while writing index for `%s': "), | |
20411 | objfile->name); | |
20412 | } | |
20413 | } | |
dce234bc PP |
20414 | } |
20415 | ||
9291a0cd TT |
20416 | \f |
20417 | ||
9eae7c52 TT |
20418 | int dwarf2_always_disassemble; |
20419 | ||
20420 | static void | |
20421 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
20422 | struct cmd_list_element *c, const char *value) | |
20423 | { | |
3e43a32a MS |
20424 | fprintf_filtered (file, |
20425 | _("Whether to always disassemble " | |
20426 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
20427 | value); |
20428 | } | |
20429 | ||
900e11f9 JK |
20430 | static void |
20431 | show_check_physname (struct ui_file *file, int from_tty, | |
20432 | struct cmd_list_element *c, const char *value) | |
20433 | { | |
20434 | fprintf_filtered (file, | |
20435 | _("Whether to check \"physname\" is %s.\n"), | |
20436 | value); | |
20437 | } | |
20438 | ||
6502dd73 DJ |
20439 | void _initialize_dwarf2_read (void); |
20440 | ||
20441 | void | |
20442 | _initialize_dwarf2_read (void) | |
20443 | { | |
96d19272 JK |
20444 | struct cmd_list_element *c; |
20445 | ||
dce234bc | 20446 | dwarf2_objfile_data_key |
c1bd65d0 | 20447 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 20448 | |
1bedd215 AC |
20449 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
20450 | Set DWARF 2 specific variables.\n\ | |
20451 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20452 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
20453 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
20454 | ||
1bedd215 AC |
20455 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
20456 | Show DWARF 2 specific variables\n\ | |
20457 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20458 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
20459 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
20460 | ||
20461 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
20462 | &dwarf2_max_cache_age, _("\ |
20463 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20464 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20465 | A higher limit means that cached compilation units will be stored\n\ | |
20466 | in memory longer, and more total memory will be used. Zero disables\n\ | |
20467 | caching, which can slow down startup."), | |
2c5b56ce | 20468 | NULL, |
920d2a44 | 20469 | show_dwarf2_max_cache_age, |
2c5b56ce | 20470 | &set_dwarf2_cmdlist, |
ae038cb0 | 20471 | &show_dwarf2_cmdlist); |
d97bc12b | 20472 | |
9eae7c52 TT |
20473 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
20474 | &dwarf2_always_disassemble, _("\ | |
20475 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
20476 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
20477 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
20478 | syntax. When disabled, expressions will be printed in a more\n\ | |
20479 | conversational style, when possible."), | |
20480 | NULL, | |
20481 | show_dwarf2_always_disassemble, | |
20482 | &set_dwarf2_cmdlist, | |
20483 | &show_dwarf2_cmdlist); | |
20484 | ||
45cfd468 DE |
20485 | add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
20486 | Set debugging of the dwarf2 reader."), _("\ | |
20487 | Show debugging of the dwarf2 reader."), _("\ | |
20488 | When enabled, debugging messages are printed during dwarf2 reading\n\ | |
20489 | and symtab expansion."), | |
20490 | NULL, | |
20491 | NULL, | |
20492 | &setdebuglist, &showdebuglist); | |
20493 | ||
ccce17b0 | 20494 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
20495 | Set debugging of the dwarf2 DIE reader."), _("\ |
20496 | Show debugging of the dwarf2 DIE reader."), _("\ | |
20497 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
20498 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
20499 | NULL, |
20500 | NULL, | |
20501 | &setdebuglist, &showdebuglist); | |
9291a0cd | 20502 | |
900e11f9 JK |
20503 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
20504 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
20505 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
20506 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
20507 | the demangler."), | |
20508 | NULL, show_check_physname, | |
20509 | &setdebuglist, &showdebuglist); | |
20510 | ||
e615022a DE |
20511 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
20512 | no_class, &use_deprecated_index_sections, _("\ | |
20513 | Set whether to use deprecated gdb_index sections."), _("\ | |
20514 | Show whether to use deprecated gdb_index sections."), _("\ | |
20515 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
20516 | Normally they are ignored either because of a missing feature or\n\ | |
20517 | performance issue.\n\ | |
20518 | Warning: This option must be enabled before gdb reads the file."), | |
20519 | NULL, | |
20520 | NULL, | |
20521 | &setlist, &showlist); | |
20522 | ||
96d19272 | 20523 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 20524 | _("\ |
fc1a9d6e | 20525 | Save a gdb-index file.\n\ |
11570e71 | 20526 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
20527 | &save_cmdlist); |
20528 | set_cmd_completer (c, filename_completer); | |
6502dd73 | 20529 | } |