Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
ecd75fc8 | 3 | Copyright (C) 1994-2014 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 | 58 | #include "exceptions.h" |
53ce3c39 | 59 | #include <sys/stat.h> |
96d19272 | 60 | #include "completer.h" |
34eaf542 | 61 | #include "vec.h" |
98bfdba5 | 62 | #include "c-lang.h" |
a766d390 | 63 | #include "go-lang.h" |
98bfdba5 | 64 | #include "valprint.h" |
3019eac3 | 65 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 66 | #include "gdb/gdb-index.h" |
60d5a603 | 67 | #include <ctype.h> |
cbb099e8 | 68 | #include "gdb_bfd.h" |
4357ac6c | 69 | #include "f-lang.h" |
05cba821 | 70 | #include "source.h" |
614c279d | 71 | #include "filestuff.h" |
dc294be5 | 72 | #include "build-id.h" |
4c2df51b | 73 | |
c906108c | 74 | #include <fcntl.h> |
0e9f083f | 75 | #include <string.h> |
4bdf3d34 | 76 | #include "gdb_assert.h" |
c906108c | 77 | #include <sys/types.h> |
d8151005 | 78 | |
34eaf542 TT |
79 | typedef struct symbol *symbolp; |
80 | DEF_VEC_P (symbolp); | |
81 | ||
73be47f5 DE |
82 | /* When == 1, print basic high level tracing messages. |
83 | When > 1, be more verbose. | |
45cfd468 | 84 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ |
73be47f5 | 85 | static unsigned int dwarf2_read_debug = 0; |
45cfd468 | 86 | |
d97bc12b | 87 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 88 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 89 | |
900e11f9 JK |
90 | /* When non-zero, cross-check physname against demangler. */ |
91 | static int check_physname = 0; | |
92 | ||
481860b3 | 93 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 94 | static int use_deprecated_index_sections = 0; |
481860b3 | 95 | |
6502dd73 DJ |
96 | static const struct objfile_data *dwarf2_objfile_data_key; |
97 | ||
f1e6e072 TT |
98 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
99 | ||
100 | static int dwarf2_locexpr_index; | |
101 | static int dwarf2_loclist_index; | |
102 | static int dwarf2_locexpr_block_index; | |
103 | static int dwarf2_loclist_block_index; | |
104 | ||
73869dc2 DE |
105 | /* A descriptor for dwarf sections. |
106 | ||
107 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
108 | scanned. BUFFER, READIN are filled in later when the section is read. | |
109 | If the section contained compressed data then SIZE is updated to record | |
110 | the uncompressed size of the section. | |
111 | ||
112 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
113 | creating the concept of virtual sections contained within a real section. | |
114 | In DWP V2 the sections of the input DWO files are concatenated together | |
115 | into one section, but section offsets are kept relative to the original | |
116 | input section. | |
117 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
118 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
119 | describe the virtual section. */ | |
120 | ||
dce234bc PP |
121 | struct dwarf2_section_info |
122 | { | |
73869dc2 DE |
123 | union |
124 | { | |
e5aa3347 | 125 | /* If this is a real section, the bfd section. */ |
73869dc2 DE |
126 | asection *asection; |
127 | /* If this is a virtual section, pointer to the containing ("real") | |
e5aa3347 | 128 | section. */ |
73869dc2 DE |
129 | struct dwarf2_section_info *containing_section; |
130 | } s; | |
19ac8c2e | 131 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 132 | const gdb_byte *buffer; |
73869dc2 | 133 | /* The size of the section, real or virtual. */ |
dce234bc | 134 | bfd_size_type size; |
73869dc2 DE |
135 | /* If this is a virtual section, the offset in the real section. |
136 | Only valid if is_virtual. */ | |
137 | bfd_size_type virtual_offset; | |
be391dca | 138 | /* True if we have tried to read this section. */ |
73869dc2 DE |
139 | char readin; |
140 | /* True if this is a virtual section, False otherwise. | |
141 | This specifies which of s.asection and s.containing_section to use. */ | |
142 | char is_virtual; | |
dce234bc PP |
143 | }; |
144 | ||
8b70b953 TT |
145 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
146 | DEF_VEC_O (dwarf2_section_info_def); | |
147 | ||
9291a0cd TT |
148 | /* All offsets in the index are of this type. It must be |
149 | architecture-independent. */ | |
150 | typedef uint32_t offset_type; | |
151 | ||
152 | DEF_VEC_I (offset_type); | |
153 | ||
156942c7 DE |
154 | /* Ensure only legit values are used. */ |
155 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
156 | do { \ | |
157 | gdb_assert ((unsigned int) (value) <= 1); \ | |
158 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
159 | } while (0) | |
160 | ||
161 | /* Ensure only legit values are used. */ | |
162 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
163 | do { \ | |
164 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
165 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
166 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
167 | } while (0) | |
168 | ||
169 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
170 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
171 | do { \ | |
172 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
173 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
174 | } while (0) | |
175 | ||
9291a0cd TT |
176 | /* A description of the mapped index. The file format is described in |
177 | a comment by the code that writes the index. */ | |
178 | struct mapped_index | |
179 | { | |
559a7a62 JK |
180 | /* Index data format version. */ |
181 | int version; | |
182 | ||
9291a0cd TT |
183 | /* The total length of the buffer. */ |
184 | off_t total_size; | |
b11b1f88 | 185 | |
9291a0cd TT |
186 | /* A pointer to the address table data. */ |
187 | const gdb_byte *address_table; | |
b11b1f88 | 188 | |
9291a0cd TT |
189 | /* Size of the address table data in bytes. */ |
190 | offset_type address_table_size; | |
b11b1f88 | 191 | |
3876f04e DE |
192 | /* The symbol table, implemented as a hash table. */ |
193 | const offset_type *symbol_table; | |
b11b1f88 | 194 | |
9291a0cd | 195 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 196 | offset_type symbol_table_slots; |
b11b1f88 | 197 | |
9291a0cd TT |
198 | /* A pointer to the constant pool. */ |
199 | const char *constant_pool; | |
200 | }; | |
201 | ||
95554aad TT |
202 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
203 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
204 | ||
9cdd5dbd DE |
205 | /* Collection of data recorded per objfile. |
206 | This hangs off of dwarf2_objfile_data_key. */ | |
207 | ||
6502dd73 DJ |
208 | struct dwarf2_per_objfile |
209 | { | |
dce234bc PP |
210 | struct dwarf2_section_info info; |
211 | struct dwarf2_section_info abbrev; | |
212 | struct dwarf2_section_info line; | |
dce234bc PP |
213 | struct dwarf2_section_info loc; |
214 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 215 | struct dwarf2_section_info macro; |
dce234bc PP |
216 | struct dwarf2_section_info str; |
217 | struct dwarf2_section_info ranges; | |
3019eac3 | 218 | struct dwarf2_section_info addr; |
dce234bc PP |
219 | struct dwarf2_section_info frame; |
220 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 221 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 222 | |
8b70b953 TT |
223 | VEC (dwarf2_section_info_def) *types; |
224 | ||
be391dca TT |
225 | /* Back link. */ |
226 | struct objfile *objfile; | |
227 | ||
d467dd73 | 228 | /* Table of all the compilation units. This is used to locate |
10b3939b | 229 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
230 | struct dwarf2_per_cu_data **all_comp_units; |
231 | ||
232 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
233 | int n_comp_units; | |
234 | ||
1fd400ff | 235 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 236 | int n_type_units; |
1fd400ff | 237 | |
a2ce51a0 DE |
238 | /* The .debug_types-related CUs (TUs). |
239 | This is stored in malloc space because we may realloc it. */ | |
b4dd5633 | 240 | struct signatured_type **all_type_units; |
1fd400ff | 241 | |
f4dc4d17 DE |
242 | /* The number of entries in all_type_unit_groups. */ |
243 | int n_type_unit_groups; | |
244 | ||
245 | /* Table of type unit groups. | |
246 | This exists to make it easy to iterate over all CUs and TU groups. */ | |
247 | struct type_unit_group **all_type_unit_groups; | |
248 | ||
249 | /* Table of struct type_unit_group objects. | |
250 | The hash key is the DW_AT_stmt_list value. */ | |
251 | htab_t type_unit_groups; | |
72dca2f5 | 252 | |
348e048f DE |
253 | /* A table mapping .debug_types signatures to its signatured_type entry. |
254 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
255 | htab_t signatured_types; | |
256 | ||
f4dc4d17 DE |
257 | /* Type unit statistics, to see how well the scaling improvements |
258 | are doing. */ | |
259 | struct tu_stats | |
260 | { | |
261 | int nr_uniq_abbrev_tables; | |
262 | int nr_symtabs; | |
263 | int nr_symtab_sharers; | |
264 | int nr_stmt_less_type_units; | |
265 | } tu_stats; | |
266 | ||
267 | /* A chain of compilation units that are currently read in, so that | |
268 | they can be freed later. */ | |
269 | struct dwarf2_per_cu_data *read_in_chain; | |
270 | ||
3019eac3 DE |
271 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
272 | This is NULL if the table hasn't been allocated yet. */ | |
273 | htab_t dwo_files; | |
274 | ||
80626a55 DE |
275 | /* Non-zero if we've check for whether there is a DWP file. */ |
276 | int dwp_checked; | |
277 | ||
278 | /* The DWP file if there is one, or NULL. */ | |
279 | struct dwp_file *dwp_file; | |
280 | ||
36586728 TT |
281 | /* The shared '.dwz' file, if one exists. This is used when the |
282 | original data was compressed using 'dwz -m'. */ | |
283 | struct dwz_file *dwz_file; | |
284 | ||
72dca2f5 FR |
285 | /* A flag indicating wether this objfile has a section loaded at a |
286 | VMA of 0. */ | |
287 | int has_section_at_zero; | |
9291a0cd | 288 | |
ae2de4f8 DE |
289 | /* True if we are using the mapped index, |
290 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
291 | unsigned char using_index; |
292 | ||
ae2de4f8 | 293 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 294 | struct mapped_index *index_table; |
98bfdba5 | 295 | |
7b9f3c50 | 296 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
297 | TUs typically share line table entries with a CU, so we maintain a |
298 | separate table of all line table entries to support the sharing. | |
299 | Note that while there can be way more TUs than CUs, we've already | |
300 | sorted all the TUs into "type unit groups", grouped by their | |
301 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
302 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
303 | htab_t quick_file_names_table; |
304 | ||
98bfdba5 PA |
305 | /* Set during partial symbol reading, to prevent queueing of full |
306 | symbols. */ | |
307 | int reading_partial_symbols; | |
673bfd45 | 308 | |
dee91e82 | 309 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 310 | This is NULL if not allocated yet. |
02142a6c | 311 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 312 | htab_t die_type_hash; |
95554aad TT |
313 | |
314 | /* The CUs we recently read. */ | |
315 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
316 | }; |
317 | ||
318 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 319 | |
251d32d9 | 320 | /* Default names of the debugging sections. */ |
c906108c | 321 | |
233a11ab CS |
322 | /* Note that if the debugging section has been compressed, it might |
323 | have a name like .zdebug_info. */ | |
324 | ||
9cdd5dbd DE |
325 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
326 | { | |
251d32d9 TG |
327 | { ".debug_info", ".zdebug_info" }, |
328 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
329 | { ".debug_line", ".zdebug_line" }, | |
330 | { ".debug_loc", ".zdebug_loc" }, | |
331 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 332 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
333 | { ".debug_str", ".zdebug_str" }, |
334 | { ".debug_ranges", ".zdebug_ranges" }, | |
335 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 336 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
337 | { ".debug_frame", ".zdebug_frame" }, |
338 | { ".eh_frame", NULL }, | |
24d3216f TT |
339 | { ".gdb_index", ".zgdb_index" }, |
340 | 23 | |
251d32d9 | 341 | }; |
c906108c | 342 | |
80626a55 | 343 | /* List of DWO/DWP sections. */ |
3019eac3 | 344 | |
80626a55 | 345 | static const struct dwop_section_names |
3019eac3 DE |
346 | { |
347 | struct dwarf2_section_names abbrev_dwo; | |
348 | struct dwarf2_section_names info_dwo; | |
349 | struct dwarf2_section_names line_dwo; | |
350 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
351 | struct dwarf2_section_names macinfo_dwo; |
352 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
353 | struct dwarf2_section_names str_dwo; |
354 | struct dwarf2_section_names str_offsets_dwo; | |
355 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
356 | struct dwarf2_section_names cu_index; |
357 | struct dwarf2_section_names tu_index; | |
3019eac3 | 358 | } |
80626a55 | 359 | dwop_section_names = |
3019eac3 DE |
360 | { |
361 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
362 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
363 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
364 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
365 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
366 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
367 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
368 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
369 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
370 | { ".debug_cu_index", ".zdebug_cu_index" }, |
371 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
372 | }; |
373 | ||
c906108c SS |
374 | /* local data types */ |
375 | ||
107d2387 AC |
376 | /* The data in a compilation unit header, after target2host |
377 | translation, looks like this. */ | |
c906108c | 378 | struct comp_unit_head |
a738430d | 379 | { |
c764a876 | 380 | unsigned int length; |
a738430d | 381 | short version; |
a738430d MK |
382 | unsigned char addr_size; |
383 | unsigned char signed_addr_p; | |
b64f50a1 | 384 | sect_offset abbrev_offset; |
57349743 | 385 | |
a738430d MK |
386 | /* Size of file offsets; either 4 or 8. */ |
387 | unsigned int offset_size; | |
57349743 | 388 | |
a738430d MK |
389 | /* Size of the length field; either 4 or 12. */ |
390 | unsigned int initial_length_size; | |
57349743 | 391 | |
a738430d MK |
392 | /* Offset to the first byte of this compilation unit header in the |
393 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 394 | sect_offset offset; |
57349743 | 395 | |
d00adf39 DE |
396 | /* Offset to first die in this cu from the start of the cu. |
397 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 398 | cu_offset first_die_offset; |
a738430d | 399 | }; |
c906108c | 400 | |
3da10d80 KS |
401 | /* Type used for delaying computation of method physnames. |
402 | See comments for compute_delayed_physnames. */ | |
403 | struct delayed_method_info | |
404 | { | |
405 | /* The type to which the method is attached, i.e., its parent class. */ | |
406 | struct type *type; | |
407 | ||
408 | /* The index of the method in the type's function fieldlists. */ | |
409 | int fnfield_index; | |
410 | ||
411 | /* The index of the method in the fieldlist. */ | |
412 | int index; | |
413 | ||
414 | /* The name of the DIE. */ | |
415 | const char *name; | |
416 | ||
417 | /* The DIE associated with this method. */ | |
418 | struct die_info *die; | |
419 | }; | |
420 | ||
421 | typedef struct delayed_method_info delayed_method_info; | |
422 | DEF_VEC_O (delayed_method_info); | |
423 | ||
e7c27a73 DJ |
424 | /* Internal state when decoding a particular compilation unit. */ |
425 | struct dwarf2_cu | |
426 | { | |
427 | /* The objfile containing this compilation unit. */ | |
428 | struct objfile *objfile; | |
429 | ||
d00adf39 | 430 | /* The header of the compilation unit. */ |
e7c27a73 | 431 | struct comp_unit_head header; |
e142c38c | 432 | |
d00adf39 DE |
433 | /* Base address of this compilation unit. */ |
434 | CORE_ADDR base_address; | |
435 | ||
436 | /* Non-zero if base_address has been set. */ | |
437 | int base_known; | |
438 | ||
e142c38c DJ |
439 | /* The language we are debugging. */ |
440 | enum language language; | |
441 | const struct language_defn *language_defn; | |
442 | ||
b0f35d58 DL |
443 | const char *producer; |
444 | ||
e142c38c DJ |
445 | /* The generic symbol table building routines have separate lists for |
446 | file scope symbols and all all other scopes (local scopes). So | |
447 | we need to select the right one to pass to add_symbol_to_list(). | |
448 | We do it by keeping a pointer to the correct list in list_in_scope. | |
449 | ||
450 | FIXME: The original dwarf code just treated the file scope as the | |
451 | first local scope, and all other local scopes as nested local | |
452 | scopes, and worked fine. Check to see if we really need to | |
453 | distinguish these in buildsym.c. */ | |
454 | struct pending **list_in_scope; | |
455 | ||
433df2d4 DE |
456 | /* The abbrev table for this CU. |
457 | Normally this points to the abbrev table in the objfile. | |
458 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
459 | struct abbrev_table *abbrev_table; | |
72bf9492 | 460 | |
b64f50a1 JK |
461 | /* Hash table holding all the loaded partial DIEs |
462 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
463 | htab_t partial_dies; |
464 | ||
465 | /* Storage for things with the same lifetime as this read-in compilation | |
466 | unit, including partial DIEs. */ | |
467 | struct obstack comp_unit_obstack; | |
468 | ||
ae038cb0 DJ |
469 | /* When multiple dwarf2_cu structures are living in memory, this field |
470 | chains them all together, so that they can be released efficiently. | |
471 | We will probably also want a generation counter so that most-recently-used | |
472 | compilation units are cached... */ | |
473 | struct dwarf2_per_cu_data *read_in_chain; | |
474 | ||
69d751e3 | 475 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
476 | struct dwarf2_per_cu_data *per_cu; |
477 | ||
478 | /* How many compilation units ago was this CU last referenced? */ | |
479 | int last_used; | |
480 | ||
b64f50a1 JK |
481 | /* A hash table of DIE cu_offset for following references with |
482 | die_info->offset.sect_off as hash. */ | |
51545339 | 483 | htab_t die_hash; |
10b3939b DJ |
484 | |
485 | /* Full DIEs if read in. */ | |
486 | struct die_info *dies; | |
487 | ||
488 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
489 | units referenced by this one. Only set during full symbol processing; | |
490 | partial symbol tables do not have dependencies. */ | |
491 | htab_t dependencies; | |
492 | ||
cb1df416 DJ |
493 | /* Header data from the line table, during full symbol processing. */ |
494 | struct line_header *line_header; | |
495 | ||
3da10d80 KS |
496 | /* A list of methods which need to have physnames computed |
497 | after all type information has been read. */ | |
498 | VEC (delayed_method_info) *method_list; | |
499 | ||
96408a79 SA |
500 | /* To be copied to symtab->call_site_htab. */ |
501 | htab_t call_site_htab; | |
502 | ||
034e5797 DE |
503 | /* Non-NULL if this CU came from a DWO file. |
504 | There is an invariant here that is important to remember: | |
505 | Except for attributes copied from the top level DIE in the "main" | |
506 | (or "stub") file in preparation for reading the DWO file | |
507 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
508 | Either there isn't a DWO file (in which case this is NULL and the point | |
509 | is moot), or there is and either we're not going to read it (in which | |
510 | case this is NULL) or there is and we are reading it (in which case this | |
511 | is non-NULL). */ | |
3019eac3 DE |
512 | struct dwo_unit *dwo_unit; |
513 | ||
514 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
515 | (zero is a valid value though). | |
1dbab08b | 516 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
517 | ULONGEST addr_base; |
518 | ||
2e3cf129 DE |
519 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
520 | (zero is a valid value though). | |
1dbab08b | 521 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 522 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
523 | be used without needing to know whether DWO files are in use or not. |
524 | N.B. This does not apply to DW_AT_ranges appearing in | |
525 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
526 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
527 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
528 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
529 | ULONGEST ranges_base; |
530 | ||
ae038cb0 DJ |
531 | /* Mark used when releasing cached dies. */ |
532 | unsigned int mark : 1; | |
533 | ||
8be455d7 JK |
534 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
535 | This test is imperfect as there may exist optimized debug code not using | |
536 | any location list and still facing inlining issues if handled as | |
537 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 538 | unsigned int has_loclist : 1; |
ba919b58 | 539 | |
1b80a9fa JK |
540 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
541 | if all the producer_is_* fields are valid. This information is cached | |
542 | because profiling CU expansion showed excessive time spent in | |
543 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
544 | unsigned int checked_producer : 1; |
545 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 546 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 547 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
548 | |
549 | /* When set, the file that we're processing is known to have | |
550 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
551 | this information, but later versions do. */ | |
552 | ||
553 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
554 | }; |
555 | ||
10b3939b DJ |
556 | /* Persistent data held for a compilation unit, even when not |
557 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 558 | read_symtab_private field of the psymtab. */ |
10b3939b | 559 | |
ae038cb0 DJ |
560 | struct dwarf2_per_cu_data |
561 | { | |
36586728 | 562 | /* The start offset and length of this compilation unit. |
45452591 | 563 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
564 | initial_length_size. |
565 | If the DIE refers to a DWO file, this is always of the original die, | |
566 | not the DWO file. */ | |
b64f50a1 | 567 | sect_offset offset; |
36586728 | 568 | unsigned int length; |
ae038cb0 DJ |
569 | |
570 | /* Flag indicating this compilation unit will be read in before | |
571 | any of the current compilation units are processed. */ | |
c764a876 | 572 | unsigned int queued : 1; |
ae038cb0 | 573 | |
0d99eb77 DE |
574 | /* This flag will be set when reading partial DIEs if we need to load |
575 | absolutely all DIEs for this compilation unit, instead of just the ones | |
576 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
577 | hash table and don't find it. */ |
578 | unsigned int load_all_dies : 1; | |
579 | ||
0186c6a7 DE |
580 | /* Non-zero if this CU is from .debug_types. |
581 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
582 | this is non-zero. */ | |
3019eac3 DE |
583 | unsigned int is_debug_types : 1; |
584 | ||
36586728 TT |
585 | /* Non-zero if this CU is from the .dwz file. */ |
586 | unsigned int is_dwz : 1; | |
587 | ||
a2ce51a0 DE |
588 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
589 | This flag is only valid if is_debug_types is true. | |
590 | We can't read a CU directly from a DWO file: There are required | |
591 | attributes in the stub. */ | |
592 | unsigned int reading_dwo_directly : 1; | |
593 | ||
7ee85ab1 DE |
594 | /* Non-zero if the TU has been read. |
595 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
596 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
597 | fetching them from random other DWOs (due to comdat folding). | |
598 | If the TU has already been read, the optimization is unnecessary | |
599 | (and unwise - we don't want to change where gdb thinks the TU lives | |
600 | "midflight"). | |
601 | This flag is only valid if is_debug_types is true. */ | |
602 | unsigned int tu_read : 1; | |
603 | ||
3019eac3 DE |
604 | /* The section this CU/TU lives in. |
605 | If the DIE refers to a DWO file, this is always the original die, | |
606 | not the DWO file. */ | |
8a0459fd | 607 | struct dwarf2_section_info *section; |
348e048f | 608 | |
17ea53c3 JK |
609 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
610 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 611 | struct dwarf2_cu *cu; |
1c379e20 | 612 | |
9cdd5dbd DE |
613 | /* The corresponding objfile. |
614 | Normally we can get the objfile from dwarf2_per_objfile. | |
615 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
616 | struct objfile *objfile; |
617 | ||
618 | /* When using partial symbol tables, the 'psymtab' field is active. | |
619 | Otherwise the 'quick' field is active. */ | |
620 | union | |
621 | { | |
622 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 623 | or NULL for unread partial units. */ |
9291a0cd TT |
624 | struct partial_symtab *psymtab; |
625 | ||
626 | /* Data needed by the "quick" functions. */ | |
627 | struct dwarf2_per_cu_quick_data *quick; | |
628 | } v; | |
95554aad | 629 | |
796a7ff8 DE |
630 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
631 | while reading psymtabs, used to compute the psymtab dependencies, | |
632 | and then cleared. Then it is filled in again while reading full | |
633 | symbols, and only deleted when the objfile is destroyed. | |
634 | ||
635 | This is also used to work around a difference between the way gold | |
636 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
637 | is a gold bug. For symbols coming from TUs, gold records in the index | |
638 | the CU that includes the TU instead of the TU itself. This breaks | |
639 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
640 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
641 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
642 | we need to look in TU Z to find X. Fortunately, this is akin to | |
643 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
644 | .gdb_index version <=7 this also records the TUs that the CU referred | |
645 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
646 | indices so we only pay a price for gold generated indices. |
647 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 648 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
649 | }; |
650 | ||
348e048f DE |
651 | /* Entry in the signatured_types hash table. */ |
652 | ||
653 | struct signatured_type | |
654 | { | |
42e7ad6c | 655 | /* The "per_cu" object of this type. |
ac9ec31b | 656 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
657 | N.B.: This is the first member so that it's easy to convert pointers |
658 | between them. */ | |
659 | struct dwarf2_per_cu_data per_cu; | |
660 | ||
3019eac3 | 661 | /* The type's signature. */ |
348e048f DE |
662 | ULONGEST signature; |
663 | ||
3019eac3 | 664 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
665 | If this TU is a DWO stub and the definition lives in a DWO file |
666 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
667 | cu_offset type_offset_in_tu; |
668 | ||
669 | /* Offset in the section of the type's DIE. | |
670 | If the definition lives in a DWO file, this is the offset in the | |
671 | .debug_types.dwo section. | |
672 | The value is zero until the actual value is known. | |
673 | Zero is otherwise not a valid section offset. */ | |
674 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
675 | |
676 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
677 | can share them. This points to the containing symtab. */ | |
678 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
679 | |
680 | /* The type. | |
681 | The first time we encounter this type we fully read it in and install it | |
682 | in the symbol tables. Subsequent times we only need the type. */ | |
683 | struct type *type; | |
a2ce51a0 DE |
684 | |
685 | /* Containing DWO unit. | |
686 | This field is valid iff per_cu.reading_dwo_directly. */ | |
687 | struct dwo_unit *dwo_unit; | |
348e048f DE |
688 | }; |
689 | ||
0186c6a7 DE |
690 | typedef struct signatured_type *sig_type_ptr; |
691 | DEF_VEC_P (sig_type_ptr); | |
692 | ||
094b34ac DE |
693 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
694 | This includes type_unit_group and quick_file_names. */ | |
695 | ||
696 | struct stmt_list_hash | |
697 | { | |
698 | /* The DWO unit this table is from or NULL if there is none. */ | |
699 | struct dwo_unit *dwo_unit; | |
700 | ||
701 | /* Offset in .debug_line or .debug_line.dwo. */ | |
702 | sect_offset line_offset; | |
703 | }; | |
704 | ||
f4dc4d17 DE |
705 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
706 | an object of this type. */ | |
707 | ||
708 | struct type_unit_group | |
709 | { | |
0186c6a7 | 710 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
711 | To simplify things we create an artificial CU that "includes" all the |
712 | type units using this stmt_list so that the rest of the code still has | |
713 | a "per_cu" handle on the symtab. | |
714 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 715 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
716 | struct dwarf2_per_cu_data per_cu; |
717 | ||
0186c6a7 DE |
718 | /* The TUs that share this DW_AT_stmt_list entry. |
719 | This is added to while parsing type units to build partial symtabs, | |
720 | and is deleted afterwards and not used again. */ | |
721 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 DE |
722 | |
723 | /* The primary symtab. | |
094b34ac DE |
724 | Type units in a group needn't all be defined in the same source file, |
725 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
726 | struct symtab *primary_symtab; |
727 | ||
094b34ac DE |
728 | /* The data used to construct the hash key. */ |
729 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
730 | |
731 | /* The number of symtabs from the line header. | |
732 | The value here must match line_header.num_file_names. */ | |
733 | unsigned int num_symtabs; | |
734 | ||
735 | /* The symbol tables for this TU (obtained from the files listed in | |
736 | DW_AT_stmt_list). | |
737 | WARNING: The order of entries here must match the order of entries | |
738 | in the line header. After the first TU using this type_unit_group, the | |
739 | line header for the subsequent TUs is recreated from this. This is done | |
740 | because we need to use the same symtabs for each TU using the same | |
741 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
742 | there's no guarantee the line header doesn't have duplicate entries. */ | |
743 | struct symtab **symtabs; | |
744 | }; | |
745 | ||
73869dc2 | 746 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
747 | |
748 | struct dwo_sections | |
749 | { | |
750 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
751 | struct dwarf2_section_info line; |
752 | struct dwarf2_section_info loc; | |
09262596 DE |
753 | struct dwarf2_section_info macinfo; |
754 | struct dwarf2_section_info macro; | |
3019eac3 DE |
755 | struct dwarf2_section_info str; |
756 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
757 | /* In the case of a virtual DWO file, these two are unused. */ |
758 | struct dwarf2_section_info info; | |
3019eac3 DE |
759 | VEC (dwarf2_section_info_def) *types; |
760 | }; | |
761 | ||
c88ee1f0 | 762 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
763 | |
764 | struct dwo_unit | |
765 | { | |
766 | /* Backlink to the containing struct dwo_file. */ | |
767 | struct dwo_file *dwo_file; | |
768 | ||
769 | /* The "id" that distinguishes this CU/TU. | |
770 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
771 | Since signatures came first, we stick with it for consistency. */ | |
772 | ULONGEST signature; | |
773 | ||
774 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 775 | struct dwarf2_section_info *section; |
3019eac3 | 776 | |
19ac8c2e | 777 | /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */ |
3019eac3 DE |
778 | sect_offset offset; |
779 | unsigned int length; | |
780 | ||
781 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
782 | cu_offset type_offset_in_tu; | |
783 | }; | |
784 | ||
73869dc2 DE |
785 | /* include/dwarf2.h defines the DWP section codes. |
786 | It defines a max value but it doesn't define a min value, which we | |
787 | use for error checking, so provide one. */ | |
788 | ||
789 | enum dwp_v2_section_ids | |
790 | { | |
791 | DW_SECT_MIN = 1 | |
792 | }; | |
793 | ||
80626a55 | 794 | /* Data for one DWO file. |
57d63ce2 DE |
795 | |
796 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
797 | appears in a DWP file). DWP files don't really have DWO files per se - | |
798 | comdat folding of types "loses" the DWO file they came from, and from | |
799 | a high level view DWP files appear to contain a mass of random types. | |
800 | However, to maintain consistency with the non-DWP case we pretend DWP | |
801 | files contain virtual DWO files, and we assign each TU with one virtual | |
802 | DWO file (generally based on the line and abbrev section offsets - | |
803 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
804 | |
805 | struct dwo_file | |
806 | { | |
0ac5b59e | 807 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
808 | For virtual DWO files the name is constructed from the section offsets |
809 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
810 | from related CU+TUs. */ | |
0ac5b59e DE |
811 | const char *dwo_name; |
812 | ||
813 | /* The DW_AT_comp_dir attribute. */ | |
814 | const char *comp_dir; | |
3019eac3 | 815 | |
80626a55 DE |
816 | /* The bfd, when the file is open. Otherwise this is NULL. |
817 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
818 | bfd *dbfd; | |
3019eac3 | 819 | |
73869dc2 DE |
820 | /* The sections that make up this DWO file. |
821 | Remember that for virtual DWO files in DWP V2, these are virtual | |
822 | sections (for lack of a better name). */ | |
3019eac3 DE |
823 | struct dwo_sections sections; |
824 | ||
19c3d4c9 DE |
825 | /* The CU in the file. |
826 | We only support one because having more than one requires hacking the | |
827 | dwo_name of each to match, which is highly unlikely to happen. | |
828 | Doing this means all TUs can share comp_dir: We also assume that | |
829 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
830 | struct dwo_unit *cu; | |
3019eac3 DE |
831 | |
832 | /* Table of TUs in the file. | |
833 | Each element is a struct dwo_unit. */ | |
834 | htab_t tus; | |
835 | }; | |
836 | ||
80626a55 DE |
837 | /* These sections are what may appear in a DWP file. */ |
838 | ||
839 | struct dwp_sections | |
840 | { | |
73869dc2 | 841 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
842 | struct dwarf2_section_info str; |
843 | struct dwarf2_section_info cu_index; | |
844 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
845 | |
846 | /* These are only used by DWP version 2 files. | |
847 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
848 | sections are referenced by section number, and are not recorded here. | |
849 | In DWP version 2 there is at most one copy of all these sections, each | |
850 | section being (effectively) comprised of the concatenation of all of the | |
851 | individual sections that exist in the version 1 format. | |
852 | To keep the code simple we treat each of these concatenated pieces as a | |
853 | section itself (a virtual section?). */ | |
854 | struct dwarf2_section_info abbrev; | |
855 | struct dwarf2_section_info info; | |
856 | struct dwarf2_section_info line; | |
857 | struct dwarf2_section_info loc; | |
858 | struct dwarf2_section_info macinfo; | |
859 | struct dwarf2_section_info macro; | |
860 | struct dwarf2_section_info str_offsets; | |
861 | struct dwarf2_section_info types; | |
80626a55 DE |
862 | }; |
863 | ||
73869dc2 DE |
864 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
865 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 866 | |
73869dc2 | 867 | struct virtual_v1_dwo_sections |
80626a55 DE |
868 | { |
869 | struct dwarf2_section_info abbrev; | |
870 | struct dwarf2_section_info line; | |
871 | struct dwarf2_section_info loc; | |
872 | struct dwarf2_section_info macinfo; | |
873 | struct dwarf2_section_info macro; | |
874 | struct dwarf2_section_info str_offsets; | |
875 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 876 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
877 | struct dwarf2_section_info info_or_types; |
878 | }; | |
879 | ||
73869dc2 DE |
880 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
881 | In version 2, the sections of the DWO files are concatenated together | |
882 | and stored in one section of that name. Thus each ELF section contains | |
883 | several "virtual" sections. */ | |
884 | ||
885 | struct virtual_v2_dwo_sections | |
886 | { | |
887 | bfd_size_type abbrev_offset; | |
888 | bfd_size_type abbrev_size; | |
889 | ||
890 | bfd_size_type line_offset; | |
891 | bfd_size_type line_size; | |
892 | ||
893 | bfd_size_type loc_offset; | |
894 | bfd_size_type loc_size; | |
895 | ||
896 | bfd_size_type macinfo_offset; | |
897 | bfd_size_type macinfo_size; | |
898 | ||
899 | bfd_size_type macro_offset; | |
900 | bfd_size_type macro_size; | |
901 | ||
902 | bfd_size_type str_offsets_offset; | |
903 | bfd_size_type str_offsets_size; | |
904 | ||
905 | /* Each DWP hash table entry records one CU or one TU. | |
906 | That is recorded here, and copied to dwo_unit.section. */ | |
907 | bfd_size_type info_or_types_offset; | |
908 | bfd_size_type info_or_types_size; | |
909 | }; | |
910 | ||
80626a55 DE |
911 | /* Contents of DWP hash tables. */ |
912 | ||
913 | struct dwp_hash_table | |
914 | { | |
73869dc2 | 915 | uint32_t version, nr_columns; |
80626a55 | 916 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
917 | const gdb_byte *hash_table, *unit_table; |
918 | union | |
919 | { | |
920 | struct | |
921 | { | |
922 | const gdb_byte *indices; | |
923 | } v1; | |
924 | struct | |
925 | { | |
926 | /* This is indexed by column number and gives the id of the section | |
927 | in that column. */ | |
928 | #define MAX_NR_V2_DWO_SECTIONS \ | |
929 | (1 /* .debug_info or .debug_types */ \ | |
930 | + 1 /* .debug_abbrev */ \ | |
931 | + 1 /* .debug_line */ \ | |
932 | + 1 /* .debug_loc */ \ | |
933 | + 1 /* .debug_str_offsets */ \ | |
934 | + 1 /* .debug_macro or .debug_macinfo */) | |
935 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
936 | const gdb_byte *offsets; | |
937 | const gdb_byte *sizes; | |
938 | } v2; | |
939 | } section_pool; | |
80626a55 DE |
940 | }; |
941 | ||
942 | /* Data for one DWP file. */ | |
943 | ||
944 | struct dwp_file | |
945 | { | |
946 | /* Name of the file. */ | |
947 | const char *name; | |
948 | ||
73869dc2 DE |
949 | /* File format version. */ |
950 | int version; | |
951 | ||
93417882 | 952 | /* The bfd. */ |
80626a55 DE |
953 | bfd *dbfd; |
954 | ||
955 | /* Section info for this file. */ | |
956 | struct dwp_sections sections; | |
957 | ||
57d63ce2 | 958 | /* Table of CUs in the file. */ |
80626a55 DE |
959 | const struct dwp_hash_table *cus; |
960 | ||
961 | /* Table of TUs in the file. */ | |
962 | const struct dwp_hash_table *tus; | |
963 | ||
19ac8c2e DE |
964 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
965 | htab_t loaded_cus; | |
966 | htab_t loaded_tus; | |
80626a55 | 967 | |
73869dc2 DE |
968 | /* Table to map ELF section numbers to their sections. |
969 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
970 | unsigned int num_sections; |
971 | asection **elf_sections; | |
972 | }; | |
973 | ||
36586728 TT |
974 | /* This represents a '.dwz' file. */ |
975 | ||
976 | struct dwz_file | |
977 | { | |
978 | /* A dwz file can only contain a few sections. */ | |
979 | struct dwarf2_section_info abbrev; | |
980 | struct dwarf2_section_info info; | |
981 | struct dwarf2_section_info str; | |
982 | struct dwarf2_section_info line; | |
983 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 984 | struct dwarf2_section_info gdb_index; |
36586728 TT |
985 | |
986 | /* The dwz's BFD. */ | |
987 | bfd *dwz_bfd; | |
988 | }; | |
989 | ||
0963b4bd MS |
990 | /* Struct used to pass misc. parameters to read_die_and_children, et |
991 | al. which are used for both .debug_info and .debug_types dies. | |
992 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 993 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
994 | |
995 | struct die_reader_specs | |
996 | { | |
a32a8923 | 997 | /* The bfd of die_section. */ |
93311388 DE |
998 | bfd* abfd; |
999 | ||
1000 | /* The CU of the DIE we are parsing. */ | |
1001 | struct dwarf2_cu *cu; | |
1002 | ||
80626a55 | 1003 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1004 | struct dwo_file *dwo_file; |
1005 | ||
dee91e82 | 1006 | /* The section the die comes from. |
3019eac3 | 1007 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1008 | struct dwarf2_section_info *die_section; |
1009 | ||
1010 | /* die_section->buffer. */ | |
d521ce57 | 1011 | const gdb_byte *buffer; |
f664829e DE |
1012 | |
1013 | /* The end of the buffer. */ | |
1014 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1015 | |
1016 | /* The value of the DW_AT_comp_dir attribute. */ | |
1017 | const char *comp_dir; | |
93311388 DE |
1018 | }; |
1019 | ||
fd820528 | 1020 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1021 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1022 | const gdb_byte *info_ptr, |
dee91e82 DE |
1023 | struct die_info *comp_unit_die, |
1024 | int has_children, | |
1025 | void *data); | |
1026 | ||
debd256d JB |
1027 | /* The line number information for a compilation unit (found in the |
1028 | .debug_line section) begins with a "statement program header", | |
1029 | which contains the following information. */ | |
1030 | struct line_header | |
1031 | { | |
1032 | unsigned int total_length; | |
1033 | unsigned short version; | |
1034 | unsigned int header_length; | |
1035 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 1036 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
1037 | unsigned char default_is_stmt; |
1038 | int line_base; | |
1039 | unsigned char line_range; | |
1040 | unsigned char opcode_base; | |
1041 | ||
1042 | /* standard_opcode_lengths[i] is the number of operands for the | |
1043 | standard opcode whose value is i. This means that | |
1044 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1045 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
1046 | unsigned char *standard_opcode_lengths; | |
1047 | ||
1048 | /* The include_directories table. NOTE! These strings are not | |
1049 | allocated with xmalloc; instead, they are pointers into | |
1050 | debug_line_buffer. If you try to free them, `free' will get | |
1051 | indigestion. */ | |
1052 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 1053 | const char **include_dirs; |
debd256d JB |
1054 | |
1055 | /* The file_names table. NOTE! These strings are not allocated | |
1056 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
1057 | Don't try to free them directly. */ | |
1058 | unsigned int num_file_names, file_names_size; | |
1059 | struct file_entry | |
c906108c | 1060 | { |
d521ce57 | 1061 | const char *name; |
debd256d JB |
1062 | unsigned int dir_index; |
1063 | unsigned int mod_time; | |
1064 | unsigned int length; | |
aaa75496 | 1065 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 1066 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
1067 | } *file_names; |
1068 | ||
1069 | /* The start and end of the statement program following this | |
6502dd73 | 1070 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 1071 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 1072 | }; |
c906108c SS |
1073 | |
1074 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 1075 | need this much information. */ |
c906108c SS |
1076 | struct partial_die_info |
1077 | { | |
72bf9492 | 1078 | /* Offset of this DIE. */ |
b64f50a1 | 1079 | sect_offset offset; |
72bf9492 DJ |
1080 | |
1081 | /* DWARF-2 tag for this DIE. */ | |
1082 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1083 | ||
72bf9492 DJ |
1084 | /* Assorted flags describing the data found in this DIE. */ |
1085 | unsigned int has_children : 1; | |
1086 | unsigned int is_external : 1; | |
1087 | unsigned int is_declaration : 1; | |
1088 | unsigned int has_type : 1; | |
1089 | unsigned int has_specification : 1; | |
1090 | unsigned int has_pc_info : 1; | |
481860b3 | 1091 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
1092 | |
1093 | /* Flag set if the SCOPE field of this structure has been | |
1094 | computed. */ | |
1095 | unsigned int scope_set : 1; | |
1096 | ||
fa4028e9 JB |
1097 | /* Flag set if the DIE has a byte_size attribute. */ |
1098 | unsigned int has_byte_size : 1; | |
1099 | ||
98bfdba5 PA |
1100 | /* Flag set if any of the DIE's children are template arguments. */ |
1101 | unsigned int has_template_arguments : 1; | |
1102 | ||
abc72ce4 DE |
1103 | /* Flag set if fixup_partial_die has been called on this die. */ |
1104 | unsigned int fixup_called : 1; | |
1105 | ||
36586728 TT |
1106 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1107 | unsigned int is_dwz : 1; | |
1108 | ||
1109 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1110 | unsigned int spec_is_dwz : 1; | |
1111 | ||
72bf9492 | 1112 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1113 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1114 | const char *name; |
72bf9492 | 1115 | |
abc72ce4 DE |
1116 | /* The linkage name, if present. */ |
1117 | const char *linkage_name; | |
1118 | ||
72bf9492 DJ |
1119 | /* The scope to prepend to our children. This is generally |
1120 | allocated on the comp_unit_obstack, so will disappear | |
1121 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1122 | const char *scope; |
72bf9492 | 1123 | |
95554aad TT |
1124 | /* Some data associated with the partial DIE. The tag determines |
1125 | which field is live. */ | |
1126 | union | |
1127 | { | |
1128 | /* The location description associated with this DIE, if any. */ | |
1129 | struct dwarf_block *locdesc; | |
1130 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1131 | sect_offset offset; | |
1132 | } d; | |
72bf9492 DJ |
1133 | |
1134 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1135 | CORE_ADDR lowpc; |
1136 | CORE_ADDR highpc; | |
72bf9492 | 1137 | |
93311388 | 1138 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1139 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1140 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1141 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1142 | const gdb_byte *sibling; |
72bf9492 DJ |
1143 | |
1144 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1145 | DW_AT_specification (or DW_AT_abstract_origin or | |
1146 | DW_AT_extension). */ | |
b64f50a1 | 1147 | sect_offset spec_offset; |
72bf9492 DJ |
1148 | |
1149 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1150 | if any. */ | |
1151 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1152 | }; |
1153 | ||
0963b4bd | 1154 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1155 | struct abbrev_info |
1156 | { | |
1157 | unsigned int number; /* number identifying abbrev */ | |
1158 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1159 | unsigned short has_children; /* boolean */ |
1160 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1161 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1162 | struct abbrev_info *next; /* next in chain */ | |
1163 | }; | |
1164 | ||
1165 | struct attr_abbrev | |
1166 | { | |
9d25dd43 DE |
1167 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1168 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1169 | }; |
1170 | ||
433df2d4 DE |
1171 | /* Size of abbrev_table.abbrev_hash_table. */ |
1172 | #define ABBREV_HASH_SIZE 121 | |
1173 | ||
1174 | /* Top level data structure to contain an abbreviation table. */ | |
1175 | ||
1176 | struct abbrev_table | |
1177 | { | |
f4dc4d17 DE |
1178 | /* Where the abbrev table came from. |
1179 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1180 | sect_offset offset; |
1181 | ||
1182 | /* Storage for the abbrev table. */ | |
1183 | struct obstack abbrev_obstack; | |
1184 | ||
1185 | /* Hash table of abbrevs. | |
1186 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1187 | It could be statically allocated, but the previous code didn't so we | |
1188 | don't either. */ | |
1189 | struct abbrev_info **abbrevs; | |
1190 | }; | |
1191 | ||
0963b4bd | 1192 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1193 | struct attribute |
1194 | { | |
9d25dd43 | 1195 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1196 | ENUM_BITFIELD(dwarf_form) form : 15; |
1197 | ||
1198 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1199 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1200 | here for better struct attribute alignment. */ | |
1201 | unsigned int string_is_canonical : 1; | |
1202 | ||
b60c80d6 DJ |
1203 | union |
1204 | { | |
15d034d0 | 1205 | const char *str; |
b60c80d6 | 1206 | struct dwarf_block *blk; |
43bbcdc2 PH |
1207 | ULONGEST unsnd; |
1208 | LONGEST snd; | |
b60c80d6 | 1209 | CORE_ADDR addr; |
ac9ec31b | 1210 | ULONGEST signature; |
b60c80d6 DJ |
1211 | } |
1212 | u; | |
1213 | }; | |
1214 | ||
0963b4bd | 1215 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1216 | struct die_info |
1217 | { | |
76815b17 DE |
1218 | /* DWARF-2 tag for this DIE. */ |
1219 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1220 | ||
1221 | /* Number of attributes */ | |
98bfdba5 PA |
1222 | unsigned char num_attrs; |
1223 | ||
1224 | /* True if we're presently building the full type name for the | |
1225 | type derived from this DIE. */ | |
1226 | unsigned char building_fullname : 1; | |
76815b17 | 1227 | |
adde2bff DE |
1228 | /* True if this die is in process. PR 16581. */ |
1229 | unsigned char in_process : 1; | |
1230 | ||
76815b17 DE |
1231 | /* Abbrev number */ |
1232 | unsigned int abbrev; | |
1233 | ||
93311388 | 1234 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1235 | sect_offset offset; |
78ba4af6 JB |
1236 | |
1237 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1238 | points to this die's parent; CHILD points to the first child of | |
1239 | this node; and all the children of a given node are chained | |
4950bc1c | 1240 | together via their SIBLING fields. */ |
639d11d3 DC |
1241 | struct die_info *child; /* Its first child, if any. */ |
1242 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1243 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1244 | |
b60c80d6 DJ |
1245 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1246 | zero, but it's not common and zero-sized arrays are not | |
1247 | sufficiently portable C. */ | |
1248 | struct attribute attrs[1]; | |
c906108c SS |
1249 | }; |
1250 | ||
0963b4bd | 1251 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1252 | |
1253 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1254 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1255 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1256 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1257 | #define DW_SND(attr) ((attr)->u.snd) | |
1258 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1259 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1260 | |
0963b4bd | 1261 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1262 | struct dwarf_block |
1263 | { | |
56eb65bd | 1264 | size_t size; |
1d6edc3c JK |
1265 | |
1266 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1267 | const gdb_byte *data; |
c906108c SS |
1268 | }; |
1269 | ||
c906108c SS |
1270 | #ifndef ATTR_ALLOC_CHUNK |
1271 | #define ATTR_ALLOC_CHUNK 4 | |
1272 | #endif | |
1273 | ||
c906108c SS |
1274 | /* Allocate fields for structs, unions and enums in this size. */ |
1275 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1276 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1277 | #endif | |
1278 | ||
c906108c SS |
1279 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1280 | but this would require a corresponding change in unpack_field_as_long | |
1281 | and friends. */ | |
1282 | static int bits_per_byte = 8; | |
1283 | ||
1284 | /* The routines that read and process dies for a C struct or C++ class | |
1285 | pass lists of data member fields and lists of member function fields | |
1286 | in an instance of a field_info structure, as defined below. */ | |
1287 | struct field_info | |
c5aa993b | 1288 | { |
0963b4bd | 1289 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1290 | struct nextfield |
1291 | { | |
1292 | struct nextfield *next; | |
1293 | int accessibility; | |
1294 | int virtuality; | |
1295 | struct field field; | |
1296 | } | |
7d0ccb61 | 1297 | *fields, *baseclasses; |
c906108c | 1298 | |
7d0ccb61 | 1299 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1300 | int nfields; |
c906108c | 1301 | |
c5aa993b JM |
1302 | /* Number of baseclasses. */ |
1303 | int nbaseclasses; | |
c906108c | 1304 | |
c5aa993b JM |
1305 | /* Set if the accesibility of one of the fields is not public. */ |
1306 | int non_public_fields; | |
c906108c | 1307 | |
c5aa993b JM |
1308 | /* Member function fields array, entries are allocated in the order they |
1309 | are encountered in the object file. */ | |
1310 | struct nextfnfield | |
1311 | { | |
1312 | struct nextfnfield *next; | |
1313 | struct fn_field fnfield; | |
1314 | } | |
1315 | *fnfields; | |
c906108c | 1316 | |
c5aa993b JM |
1317 | /* Member function fieldlist array, contains name of possibly overloaded |
1318 | member function, number of overloaded member functions and a pointer | |
1319 | to the head of the member function field chain. */ | |
1320 | struct fnfieldlist | |
1321 | { | |
15d034d0 | 1322 | const char *name; |
c5aa993b JM |
1323 | int length; |
1324 | struct nextfnfield *head; | |
1325 | } | |
1326 | *fnfieldlists; | |
c906108c | 1327 | |
c5aa993b JM |
1328 | /* Number of entries in the fnfieldlists array. */ |
1329 | int nfnfields; | |
98751a41 JK |
1330 | |
1331 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1332 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1333 | struct typedef_field_list | |
1334 | { | |
1335 | struct typedef_field field; | |
1336 | struct typedef_field_list *next; | |
1337 | } | |
1338 | *typedef_field_list; | |
1339 | unsigned typedef_field_list_count; | |
c5aa993b | 1340 | }; |
c906108c | 1341 | |
10b3939b DJ |
1342 | /* One item on the queue of compilation units to read in full symbols |
1343 | for. */ | |
1344 | struct dwarf2_queue_item | |
1345 | { | |
1346 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1347 | enum language pretend_language; |
10b3939b DJ |
1348 | struct dwarf2_queue_item *next; |
1349 | }; | |
1350 | ||
1351 | /* The current queue. */ | |
1352 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1353 | ||
ae038cb0 DJ |
1354 | /* Loaded secondary compilation units are kept in memory until they |
1355 | have not been referenced for the processing of this many | |
1356 | compilation units. Set this to zero to disable caching. Cache | |
1357 | sizes of up to at least twenty will improve startup time for | |
1358 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1359 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1360 | static void |
1361 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1362 | struct cmd_list_element *c, const char *value) | |
1363 | { | |
3e43a32a MS |
1364 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1365 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1366 | value); |
1367 | } | |
4390d890 | 1368 | \f |
c906108c SS |
1369 | /* local function prototypes */ |
1370 | ||
a32a8923 DE |
1371 | static const char *get_section_name (const struct dwarf2_section_info *); |
1372 | ||
1373 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1374 | ||
4efb68b1 | 1375 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1376 | |
918dd910 JK |
1377 | static void dwarf2_find_base_address (struct die_info *die, |
1378 | struct dwarf2_cu *cu); | |
1379 | ||
0018ea6f DE |
1380 | static struct partial_symtab *create_partial_symtab |
1381 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1382 | ||
c67a9c90 | 1383 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1384 | |
72bf9492 DJ |
1385 | static void scan_partial_symbols (struct partial_die_info *, |
1386 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1387 | int, struct dwarf2_cu *); |
c906108c | 1388 | |
72bf9492 DJ |
1389 | static void add_partial_symbol (struct partial_die_info *, |
1390 | struct dwarf2_cu *); | |
63d06c5c | 1391 | |
72bf9492 DJ |
1392 | static void add_partial_namespace (struct partial_die_info *pdi, |
1393 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1394 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1395 | |
5d7cb8df JK |
1396 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1397 | CORE_ADDR *highpc, int need_pc, | |
1398 | struct dwarf2_cu *cu); | |
1399 | ||
72bf9492 DJ |
1400 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1401 | struct dwarf2_cu *cu); | |
91c24f0a | 1402 | |
bc30ff58 JB |
1403 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1404 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1405 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1406 | |
257e7a09 YQ |
1407 | static void dwarf2_read_symtab (struct partial_symtab *, |
1408 | struct objfile *); | |
c906108c | 1409 | |
a14ed312 | 1410 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1411 | |
433df2d4 DE |
1412 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1413 | (const struct abbrev_table *, unsigned int); | |
1414 | ||
1415 | static struct abbrev_table *abbrev_table_read_table | |
1416 | (struct dwarf2_section_info *, sect_offset); | |
1417 | ||
1418 | static void abbrev_table_free (struct abbrev_table *); | |
1419 | ||
f4dc4d17 DE |
1420 | static void abbrev_table_free_cleanup (void *); |
1421 | ||
dee91e82 DE |
1422 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1423 | struct dwarf2_section_info *); | |
c906108c | 1424 | |
f3dd6933 | 1425 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1426 | |
d521ce57 | 1427 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1428 | |
dee91e82 | 1429 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1430 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1431 | |
d521ce57 TT |
1432 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1433 | struct partial_die_info *, | |
1434 | struct abbrev_info *, | |
1435 | unsigned int, | |
1436 | const gdb_byte *); | |
c906108c | 1437 | |
36586728 | 1438 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1439 | struct dwarf2_cu *); |
72bf9492 DJ |
1440 | |
1441 | static void fixup_partial_die (struct partial_die_info *, | |
1442 | struct dwarf2_cu *); | |
1443 | ||
d521ce57 TT |
1444 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1445 | struct attribute *, struct attr_abbrev *, | |
1446 | const gdb_byte *); | |
a8329558 | 1447 | |
a1855c1d | 1448 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1449 | |
a1855c1d | 1450 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1451 | |
a1855c1d | 1452 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1453 | |
a1855c1d | 1454 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1455 | |
a1855c1d | 1456 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1457 | |
d521ce57 | 1458 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1459 | unsigned int *); |
c906108c | 1460 | |
d521ce57 | 1461 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1462 | |
1463 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1464 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1465 | unsigned int *, unsigned int *); |
613e1657 | 1466 | |
d521ce57 TT |
1467 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1468 | const struct comp_unit_head *, | |
c764a876 DE |
1469 | unsigned int *); |
1470 | ||
d521ce57 | 1471 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1472 | |
f4dc4d17 DE |
1473 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1474 | sect_offset); | |
1475 | ||
d521ce57 | 1476 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1477 | |
d521ce57 | 1478 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1479 | |
d521ce57 TT |
1480 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1481 | const struct comp_unit_head *, | |
1482 | unsigned int *); | |
4bdf3d34 | 1483 | |
d521ce57 | 1484 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1485 | |
d521ce57 | 1486 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1487 | |
d521ce57 | 1488 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1489 | |
d521ce57 TT |
1490 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1491 | const gdb_byte *, | |
3019eac3 DE |
1492 | unsigned int *); |
1493 | ||
d521ce57 | 1494 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1495 | ULONGEST str_index); |
3019eac3 | 1496 | |
e142c38c | 1497 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1498 | |
e142c38c DJ |
1499 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1500 | struct dwarf2_cu *); | |
c906108c | 1501 | |
348e048f | 1502 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1503 | unsigned int); |
348e048f | 1504 | |
05cf31d1 JB |
1505 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1506 | struct dwarf2_cu *cu); | |
1507 | ||
e142c38c | 1508 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1509 | |
e142c38c | 1510 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1511 | struct dwarf2_cu **); |
63d06c5c | 1512 | |
debd256d JB |
1513 | static void free_line_header (struct line_header *lh); |
1514 | ||
3019eac3 DE |
1515 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1516 | struct dwarf2_cu *cu); | |
debd256d | 1517 | |
f3f5162e DE |
1518 | static void dwarf_decode_lines (struct line_header *, const char *, |
1519 | struct dwarf2_cu *, struct partial_symtab *, | |
1520 | int); | |
c906108c | 1521 | |
d521ce57 | 1522 | static void dwarf2_start_subfile (const char *, const char *, const char *); |
c906108c | 1523 | |
f4dc4d17 | 1524 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
15d034d0 | 1525 | const char *, const char *, CORE_ADDR); |
f4dc4d17 | 1526 | |
a14ed312 | 1527 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1528 | struct dwarf2_cu *); |
c906108c | 1529 | |
34eaf542 TT |
1530 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1531 | struct dwarf2_cu *, struct symbol *); | |
1532 | ||
ff39bb5e | 1533 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1534 | struct dwarf2_cu *); |
c906108c | 1535 | |
ff39bb5e | 1536 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1537 | struct type *type, |
1538 | const char *name, | |
1539 | struct obstack *obstack, | |
12df843f | 1540 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1541 | const gdb_byte **bytes, |
98bfdba5 | 1542 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1543 | |
e7c27a73 | 1544 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1545 | |
b4ba55a1 JB |
1546 | static int need_gnat_info (struct dwarf2_cu *); |
1547 | ||
3e43a32a MS |
1548 | static struct type *die_descriptive_type (struct die_info *, |
1549 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1550 | |
1551 | static void set_descriptive_type (struct type *, struct die_info *, | |
1552 | struct dwarf2_cu *); | |
1553 | ||
e7c27a73 DJ |
1554 | static struct type *die_containing_type (struct die_info *, |
1555 | struct dwarf2_cu *); | |
c906108c | 1556 | |
ff39bb5e | 1557 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1558 | struct dwarf2_cu *); |
c906108c | 1559 | |
f792889a | 1560 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1561 | |
673bfd45 DE |
1562 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1563 | ||
0d5cff50 | 1564 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1565 | |
6e70227d | 1566 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1567 | const char *suffix, int physname, |
1568 | struct dwarf2_cu *cu); | |
63d06c5c | 1569 | |
e7c27a73 | 1570 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1571 | |
348e048f DE |
1572 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1573 | ||
e7c27a73 | 1574 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1575 | |
e7c27a73 | 1576 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1577 | |
96408a79 SA |
1578 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1579 | ||
ff013f42 JK |
1580 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1581 | struct dwarf2_cu *, struct partial_symtab *); | |
1582 | ||
a14ed312 | 1583 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1584 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1585 | struct partial_symtab *); | |
c906108c | 1586 | |
fae299cd DC |
1587 | static void get_scope_pc_bounds (struct die_info *, |
1588 | CORE_ADDR *, CORE_ADDR *, | |
1589 | struct dwarf2_cu *); | |
1590 | ||
801e3a5b JB |
1591 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1592 | CORE_ADDR, struct dwarf2_cu *); | |
1593 | ||
a14ed312 | 1594 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1595 | struct dwarf2_cu *); |
c906108c | 1596 | |
a14ed312 | 1597 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1598 | struct type *, struct dwarf2_cu *); |
c906108c | 1599 | |
a14ed312 | 1600 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1601 | struct die_info *, struct type *, |
e7c27a73 | 1602 | struct dwarf2_cu *); |
c906108c | 1603 | |
a14ed312 | 1604 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1605 | struct type *, |
1606 | struct dwarf2_cu *); | |
c906108c | 1607 | |
134d01f1 | 1608 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1609 | |
e7c27a73 | 1610 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1611 | |
e7c27a73 | 1612 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1613 | |
5d7cb8df JK |
1614 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1615 | ||
27aa8d6a SW |
1616 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1617 | ||
74921315 KS |
1618 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1619 | ||
f55ee35c JK |
1620 | static struct type *read_module_type (struct die_info *die, |
1621 | struct dwarf2_cu *cu); | |
1622 | ||
38d518c9 | 1623 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1624 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1625 | |
134d01f1 | 1626 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1627 | |
e7c27a73 | 1628 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1629 | |
6e70227d | 1630 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1631 | struct dwarf2_cu *); |
1632 | ||
bf6af496 | 1633 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1634 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1635 | struct die_info *); |
639d11d3 | 1636 | |
dee91e82 | 1637 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1638 | const gdb_byte *info_ptr, |
1639 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1640 | struct die_info *parent); |
1641 | ||
d521ce57 TT |
1642 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1643 | struct die_info **, const gdb_byte *, | |
1644 | int *, int); | |
3019eac3 | 1645 | |
d521ce57 TT |
1646 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1647 | struct die_info **, const gdb_byte *, | |
1648 | int *); | |
93311388 | 1649 | |
e7c27a73 | 1650 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1651 | |
15d034d0 TT |
1652 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1653 | struct obstack *); | |
71c25dea | 1654 | |
15d034d0 | 1655 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1656 | |
15d034d0 | 1657 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1658 | struct die_info *die, |
1659 | struct dwarf2_cu *cu); | |
1660 | ||
ca69b9e6 DE |
1661 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1662 | struct dwarf2_cu *cu); | |
1663 | ||
e142c38c | 1664 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1665 | struct dwarf2_cu **); |
9219021c | 1666 | |
f39c6ffd | 1667 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1668 | |
f39c6ffd | 1669 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1670 | |
f39c6ffd | 1671 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1672 | |
a14ed312 | 1673 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1674 | |
f39c6ffd | 1675 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1676 | |
f9aca02d | 1677 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1678 | |
d97bc12b DE |
1679 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1680 | ||
1681 | static void dump_die_for_error (struct die_info *); | |
1682 | ||
1683 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1684 | struct die_info *); | |
c906108c | 1685 | |
d97bc12b | 1686 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1687 | |
51545339 | 1688 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1689 | struct dwarf2_cu *); |
c906108c | 1690 | |
ff39bb5e | 1691 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1692 | |
ff39bb5e | 1693 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1694 | |
348e048f | 1695 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1696 | const struct attribute *, |
348e048f DE |
1697 | struct dwarf2_cu **); |
1698 | ||
10b3939b | 1699 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1700 | const struct attribute *, |
f2f0e013 | 1701 | struct dwarf2_cu **); |
c906108c | 1702 | |
348e048f | 1703 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1704 | const struct attribute *, |
348e048f DE |
1705 | struct dwarf2_cu **); |
1706 | ||
ac9ec31b DE |
1707 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1708 | struct dwarf2_cu *); | |
1709 | ||
1710 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1711 | const struct attribute *, |
ac9ec31b DE |
1712 | struct dwarf2_cu *); |
1713 | ||
e5fe5e75 | 1714 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1715 | |
52dc124a | 1716 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1717 | |
f4dc4d17 | 1718 | static struct type_unit_group *get_type_unit_group |
ff39bb5e | 1719 | (struct dwarf2_cu *, const struct attribute *); |
f4dc4d17 DE |
1720 | |
1721 | static void build_type_unit_groups (die_reader_func_ftype *, void *); | |
1722 | ||
c906108c SS |
1723 | /* memory allocation interface */ |
1724 | ||
7b5a2f43 | 1725 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1726 | |
b60c80d6 | 1727 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1728 | |
09262596 | 1729 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
15d034d0 | 1730 | const char *, int); |
2e276125 | 1731 | |
6e5a29e1 | 1732 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1733 | |
6e5a29e1 | 1734 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1735 | |
6e5a29e1 | 1736 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1737 | |
6e5a29e1 | 1738 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1739 | |
8cf6f0b1 TT |
1740 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1741 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1742 | const struct attribute *attr); |
8cf6f0b1 | 1743 | |
ff39bb5e | 1744 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1745 | struct symbol *sym, |
f1e6e072 TT |
1746 | struct dwarf2_cu *cu, |
1747 | int is_block); | |
4c2df51b | 1748 | |
d521ce57 TT |
1749 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1750 | const gdb_byte *info_ptr, | |
1751 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1752 | |
72bf9492 DJ |
1753 | static void free_stack_comp_unit (void *); |
1754 | ||
72bf9492 DJ |
1755 | static hashval_t partial_die_hash (const void *item); |
1756 | ||
1757 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1758 | ||
ae038cb0 | 1759 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1760 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1761 | |
9816fde3 | 1762 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1763 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1764 | |
1765 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1766 | struct die_info *comp_unit_die, |
1767 | enum language pretend_language); | |
93311388 | 1768 | |
68dc6402 | 1769 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1770 | |
1771 | static void free_cached_comp_units (void *); | |
1772 | ||
1773 | static void age_cached_comp_units (void); | |
1774 | ||
dee91e82 | 1775 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1776 | |
f792889a DJ |
1777 | static struct type *set_die_type (struct die_info *, struct type *, |
1778 | struct dwarf2_cu *); | |
1c379e20 | 1779 | |
ae038cb0 DJ |
1780 | static void create_all_comp_units (struct objfile *); |
1781 | ||
0e50663e | 1782 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1783 | |
95554aad TT |
1784 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1785 | enum language); | |
10b3939b | 1786 | |
95554aad TT |
1787 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1788 | enum language); | |
10b3939b | 1789 | |
f4dc4d17 DE |
1790 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1791 | enum language); | |
1792 | ||
10b3939b DJ |
1793 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1794 | struct dwarf2_per_cu_data *); | |
1795 | ||
ae038cb0 DJ |
1796 | static void dwarf2_mark (struct dwarf2_cu *); |
1797 | ||
1798 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1799 | ||
b64f50a1 | 1800 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1801 | struct dwarf2_per_cu_data *); |
673bfd45 | 1802 | |
f792889a | 1803 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1804 | |
9291a0cd TT |
1805 | static void dwarf2_release_queue (void *dummy); |
1806 | ||
95554aad TT |
1807 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1808 | enum language pretend_language); | |
1809 | ||
a0f42c21 | 1810 | static void process_queue (void); |
9291a0cd TT |
1811 | |
1812 | static void find_file_and_directory (struct die_info *die, | |
1813 | struct dwarf2_cu *cu, | |
15d034d0 | 1814 | const char **name, const char **comp_dir); |
9291a0cd TT |
1815 | |
1816 | static char *file_full_name (int file, struct line_header *lh, | |
1817 | const char *comp_dir); | |
1818 | ||
d521ce57 | 1819 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1820 | (struct comp_unit_head *header, |
1821 | struct dwarf2_section_info *section, | |
d521ce57 | 1822 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1823 | int is_debug_types_section); |
1824 | ||
fd820528 | 1825 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1826 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1827 | int use_existing_cu, int keep, | |
3019eac3 DE |
1828 | die_reader_func_ftype *die_reader_func, void *data); |
1829 | ||
dee91e82 DE |
1830 | static void init_cutu_and_read_dies_simple |
1831 | (struct dwarf2_per_cu_data *this_cu, | |
1832 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1833 | |
673bfd45 | 1834 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1835 | |
3019eac3 DE |
1836 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1837 | ||
57d63ce2 DE |
1838 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1839 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1840 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1841 | |
1842 | static struct dwp_file *get_dwp_file (void); | |
1843 | ||
3019eac3 | 1844 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1845 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1846 | |
1847 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1848 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1849 | |
89e63ee4 DE |
1850 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1851 | ||
3019eac3 DE |
1852 | static void free_dwo_file_cleanup (void *); |
1853 | ||
95554aad TT |
1854 | static void process_cu_includes (void); |
1855 | ||
1b80a9fa | 1856 | static void check_producer (struct dwarf2_cu *cu); |
4390d890 DE |
1857 | \f |
1858 | /* Various complaints about symbol reading that don't abort the process. */ | |
1859 | ||
1860 | static void | |
1861 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1862 | { | |
1863 | complaint (&symfile_complaints, | |
1864 | _("statement list doesn't fit in .debug_line section")); | |
1865 | } | |
1866 | ||
1867 | static void | |
1868 | dwarf2_debug_line_missing_file_complaint (void) | |
1869 | { | |
1870 | complaint (&symfile_complaints, | |
1871 | _(".debug_line section has line data without a file")); | |
1872 | } | |
1873 | ||
1874 | static void | |
1875 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1876 | { | |
1877 | complaint (&symfile_complaints, | |
1878 | _(".debug_line section has line " | |
1879 | "program sequence without an end")); | |
1880 | } | |
1881 | ||
1882 | static void | |
1883 | dwarf2_complex_location_expr_complaint (void) | |
1884 | { | |
1885 | complaint (&symfile_complaints, _("location expression too complex")); | |
1886 | } | |
1887 | ||
1888 | static void | |
1889 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1890 | int arg3) | |
1891 | { | |
1892 | complaint (&symfile_complaints, | |
1893 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1894 | arg1, arg2, arg3); | |
1895 | } | |
1896 | ||
1897 | static void | |
1898 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1899 | { | |
1900 | complaint (&symfile_complaints, | |
1901 | _("debug info runs off end of %s section" | |
1902 | " [in module %s]"), | |
a32a8923 DE |
1903 | get_section_name (section), |
1904 | get_section_file_name (section)); | |
4390d890 | 1905 | } |
1b80a9fa | 1906 | |
4390d890 DE |
1907 | static void |
1908 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1909 | { | |
1910 | complaint (&symfile_complaints, | |
1911 | _("macro debug info contains a " | |
1912 | "malformed macro definition:\n`%s'"), | |
1913 | arg1); | |
1914 | } | |
1915 | ||
1916 | static void | |
1917 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1918 | { | |
1919 | complaint (&symfile_complaints, | |
1920 | _("invalid attribute class or form for '%s' in '%s'"), | |
1921 | arg1, arg2); | |
1922 | } | |
1923 | \f | |
9291a0cd TT |
1924 | #if WORDS_BIGENDIAN |
1925 | ||
1926 | /* Convert VALUE between big- and little-endian. */ | |
1927 | static offset_type | |
1928 | byte_swap (offset_type value) | |
1929 | { | |
1930 | offset_type result; | |
1931 | ||
1932 | result = (value & 0xff) << 24; | |
1933 | result |= (value & 0xff00) << 8; | |
1934 | result |= (value & 0xff0000) >> 8; | |
1935 | result |= (value & 0xff000000) >> 24; | |
1936 | return result; | |
1937 | } | |
1938 | ||
1939 | #define MAYBE_SWAP(V) byte_swap (V) | |
1940 | ||
1941 | #else | |
1942 | #define MAYBE_SWAP(V) (V) | |
1943 | #endif /* WORDS_BIGENDIAN */ | |
1944 | ||
31aa7e4e JB |
1945 | /* Read the given attribute value as an address, taking the attribute's |
1946 | form into account. */ | |
1947 | ||
1948 | static CORE_ADDR | |
1949 | attr_value_as_address (struct attribute *attr) | |
1950 | { | |
1951 | CORE_ADDR addr; | |
1952 | ||
1953 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
1954 | { | |
1955 | /* Aside from a few clearly defined exceptions, attributes that | |
1956 | contain an address must always be in DW_FORM_addr form. | |
1957 | Unfortunately, some compilers happen to be violating this | |
1958 | requirement by encoding addresses using other forms, such | |
1959 | as DW_FORM_data4 for example. For those broken compilers, | |
1960 | we try to do our best, without any guarantee of success, | |
1961 | to interpret the address correctly. It would also be nice | |
1962 | to generate a complaint, but that would require us to maintain | |
1963 | a list of legitimate cases where a non-address form is allowed, | |
1964 | as well as update callers to pass in at least the CU's DWARF | |
1965 | version. This is more overhead than what we're willing to | |
1966 | expand for a pretty rare case. */ | |
1967 | addr = DW_UNSND (attr); | |
1968 | } | |
1969 | else | |
1970 | addr = DW_ADDR (attr); | |
1971 | ||
1972 | return addr; | |
1973 | } | |
1974 | ||
9291a0cd TT |
1975 | /* The suffix for an index file. */ |
1976 | #define INDEX_SUFFIX ".gdb-index" | |
1977 | ||
c906108c | 1978 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1979 | information and return true if we have enough to do something. |
1980 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1981 | ELF names are used. */ | |
c906108c SS |
1982 | |
1983 | int | |
251d32d9 TG |
1984 | dwarf2_has_info (struct objfile *objfile, |
1985 | const struct dwarf2_debug_sections *names) | |
c906108c | 1986 | { |
be391dca TT |
1987 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1988 | if (!dwarf2_per_objfile) | |
1989 | { | |
1990 | /* Initialize per-objfile state. */ | |
1991 | struct dwarf2_per_objfile *data | |
1992 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1993 | |
be391dca TT |
1994 | memset (data, 0, sizeof (*data)); |
1995 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1996 | dwarf2_per_objfile = data; | |
6502dd73 | 1997 | |
251d32d9 TG |
1998 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1999 | (void *) names); | |
be391dca TT |
2000 | dwarf2_per_objfile->objfile = objfile; |
2001 | } | |
73869dc2 DE |
2002 | return (!dwarf2_per_objfile->info.is_virtual |
2003 | && dwarf2_per_objfile->info.s.asection != NULL | |
2004 | && !dwarf2_per_objfile->abbrev.is_virtual | |
2005 | && dwarf2_per_objfile->abbrev.s.asection != NULL); | |
2006 | } | |
2007 | ||
2008 | /* Return the containing section of virtual section SECTION. */ | |
2009 | ||
2010 | static struct dwarf2_section_info * | |
2011 | get_containing_section (const struct dwarf2_section_info *section) | |
2012 | { | |
2013 | gdb_assert (section->is_virtual); | |
2014 | return section->s.containing_section; | |
c906108c SS |
2015 | } |
2016 | ||
a32a8923 DE |
2017 | /* Return the bfd owner of SECTION. */ |
2018 | ||
2019 | static struct bfd * | |
2020 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2021 | { | |
73869dc2 DE |
2022 | if (section->is_virtual) |
2023 | { | |
2024 | section = get_containing_section (section); | |
2025 | gdb_assert (!section->is_virtual); | |
2026 | } | |
2027 | return section->s.asection->owner; | |
a32a8923 DE |
2028 | } |
2029 | ||
2030 | /* Return the bfd section of SECTION. | |
2031 | Returns NULL if the section is not present. */ | |
2032 | ||
2033 | static asection * | |
2034 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2035 | { | |
73869dc2 DE |
2036 | if (section->is_virtual) |
2037 | { | |
2038 | section = get_containing_section (section); | |
2039 | gdb_assert (!section->is_virtual); | |
2040 | } | |
2041 | return section->s.asection; | |
a32a8923 DE |
2042 | } |
2043 | ||
2044 | /* Return the name of SECTION. */ | |
2045 | ||
2046 | static const char * | |
2047 | get_section_name (const struct dwarf2_section_info *section) | |
2048 | { | |
2049 | asection *sectp = get_section_bfd_section (section); | |
2050 | ||
2051 | gdb_assert (sectp != NULL); | |
2052 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2053 | } | |
2054 | ||
2055 | /* Return the name of the file SECTION is in. */ | |
2056 | ||
2057 | static const char * | |
2058 | get_section_file_name (const struct dwarf2_section_info *section) | |
2059 | { | |
2060 | bfd *abfd = get_section_bfd_owner (section); | |
2061 | ||
2062 | return bfd_get_filename (abfd); | |
2063 | } | |
2064 | ||
2065 | /* Return the id of SECTION. | |
2066 | Returns 0 if SECTION doesn't exist. */ | |
2067 | ||
2068 | static int | |
2069 | get_section_id (const struct dwarf2_section_info *section) | |
2070 | { | |
2071 | asection *sectp = get_section_bfd_section (section); | |
2072 | ||
2073 | if (sectp == NULL) | |
2074 | return 0; | |
2075 | return sectp->id; | |
2076 | } | |
2077 | ||
2078 | /* Return the flags of SECTION. | |
73869dc2 | 2079 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2080 | |
2081 | static int | |
2082 | get_section_flags (const struct dwarf2_section_info *section) | |
2083 | { | |
2084 | asection *sectp = get_section_bfd_section (section); | |
2085 | ||
2086 | gdb_assert (sectp != NULL); | |
2087 | return bfd_get_section_flags (sectp->owner, sectp); | |
2088 | } | |
2089 | ||
251d32d9 TG |
2090 | /* When loading sections, we look either for uncompressed section or for |
2091 | compressed section names. */ | |
233a11ab CS |
2092 | |
2093 | static int | |
251d32d9 TG |
2094 | section_is_p (const char *section_name, |
2095 | const struct dwarf2_section_names *names) | |
233a11ab | 2096 | { |
251d32d9 TG |
2097 | if (names->normal != NULL |
2098 | && strcmp (section_name, names->normal) == 0) | |
2099 | return 1; | |
2100 | if (names->compressed != NULL | |
2101 | && strcmp (section_name, names->compressed) == 0) | |
2102 | return 1; | |
2103 | return 0; | |
233a11ab CS |
2104 | } |
2105 | ||
c906108c SS |
2106 | /* This function is mapped across the sections and remembers the |
2107 | offset and size of each of the debugging sections we are interested | |
2108 | in. */ | |
2109 | ||
2110 | static void | |
251d32d9 | 2111 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 2112 | { |
251d32d9 | 2113 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 2114 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
2115 | |
2116 | if (vnames == NULL) | |
2117 | names = &dwarf2_elf_names; | |
2118 | else | |
2119 | names = (const struct dwarf2_debug_sections *) vnames; | |
2120 | ||
dc7650b8 JK |
2121 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2122 | { | |
2123 | } | |
2124 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 2125 | { |
73869dc2 | 2126 | dwarf2_per_objfile->info.s.asection = sectp; |
dce234bc | 2127 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); |
c906108c | 2128 | } |
251d32d9 | 2129 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 2130 | { |
73869dc2 | 2131 | dwarf2_per_objfile->abbrev.s.asection = sectp; |
dce234bc | 2132 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); |
c906108c | 2133 | } |
251d32d9 | 2134 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 2135 | { |
73869dc2 | 2136 | dwarf2_per_objfile->line.s.asection = sectp; |
dce234bc | 2137 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); |
c906108c | 2138 | } |
251d32d9 | 2139 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 2140 | { |
73869dc2 | 2141 | dwarf2_per_objfile->loc.s.asection = sectp; |
dce234bc | 2142 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); |
c906108c | 2143 | } |
251d32d9 | 2144 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 2145 | { |
73869dc2 | 2146 | dwarf2_per_objfile->macinfo.s.asection = sectp; |
dce234bc | 2147 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); |
c906108c | 2148 | } |
cf2c3c16 TT |
2149 | else if (section_is_p (sectp->name, &names->macro)) |
2150 | { | |
73869dc2 | 2151 | dwarf2_per_objfile->macro.s.asection = sectp; |
cf2c3c16 TT |
2152 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); |
2153 | } | |
251d32d9 | 2154 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 2155 | { |
73869dc2 | 2156 | dwarf2_per_objfile->str.s.asection = sectp; |
dce234bc | 2157 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); |
c906108c | 2158 | } |
3019eac3 DE |
2159 | else if (section_is_p (sectp->name, &names->addr)) |
2160 | { | |
73869dc2 | 2161 | dwarf2_per_objfile->addr.s.asection = sectp; |
3019eac3 DE |
2162 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); |
2163 | } | |
251d32d9 | 2164 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 2165 | { |
73869dc2 | 2166 | dwarf2_per_objfile->frame.s.asection = sectp; |
dce234bc | 2167 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2168 | } |
251d32d9 | 2169 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 2170 | { |
73869dc2 | 2171 | dwarf2_per_objfile->eh_frame.s.asection = sectp; |
dc7650b8 | 2172 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2173 | } |
251d32d9 | 2174 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2175 | { |
73869dc2 | 2176 | dwarf2_per_objfile->ranges.s.asection = sectp; |
dce234bc | 2177 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); |
af34e669 | 2178 | } |
251d32d9 | 2179 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2180 | { |
8b70b953 TT |
2181 | struct dwarf2_section_info type_section; |
2182 | ||
2183 | memset (&type_section, 0, sizeof (type_section)); | |
73869dc2 | 2184 | type_section.s.asection = sectp; |
8b70b953 TT |
2185 | type_section.size = bfd_get_section_size (sectp); |
2186 | ||
2187 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2188 | &type_section); | |
348e048f | 2189 | } |
251d32d9 | 2190 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd | 2191 | { |
73869dc2 | 2192 | dwarf2_per_objfile->gdb_index.s.asection = sectp; |
9291a0cd TT |
2193 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); |
2194 | } | |
dce234bc | 2195 | |
72dca2f5 FR |
2196 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
2197 | && bfd_section_vma (abfd, sectp) == 0) | |
2198 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2199 | } |
2200 | ||
fceca515 DE |
2201 | /* A helper function that decides whether a section is empty, |
2202 | or not present. */ | |
9e0ac564 TT |
2203 | |
2204 | static int | |
19ac8c2e | 2205 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2206 | { |
73869dc2 DE |
2207 | if (section->is_virtual) |
2208 | return section->size == 0; | |
2209 | return section->s.asection == NULL || section->size == 0; | |
9e0ac564 TT |
2210 | } |
2211 | ||
3019eac3 DE |
2212 | /* Read the contents of the section INFO. |
2213 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2214 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2215 | of the DWO file. | |
dce234bc | 2216 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2217 | |
dce234bc PP |
2218 | static void |
2219 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2220 | { |
a32a8923 | 2221 | asection *sectp; |
3019eac3 | 2222 | bfd *abfd; |
dce234bc | 2223 | gdb_byte *buf, *retbuf; |
c906108c | 2224 | |
be391dca TT |
2225 | if (info->readin) |
2226 | return; | |
dce234bc | 2227 | info->buffer = NULL; |
be391dca | 2228 | info->readin = 1; |
188dd5d6 | 2229 | |
9e0ac564 | 2230 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2231 | return; |
c906108c | 2232 | |
a32a8923 | 2233 | sectp = get_section_bfd_section (info); |
3019eac3 | 2234 | |
73869dc2 DE |
2235 | /* If this is a virtual section we need to read in the real one first. */ |
2236 | if (info->is_virtual) | |
2237 | { | |
2238 | struct dwarf2_section_info *containing_section = | |
2239 | get_containing_section (info); | |
2240 | ||
2241 | gdb_assert (sectp != NULL); | |
2242 | if ((sectp->flags & SEC_RELOC) != 0) | |
2243 | { | |
2244 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2245 | " supported in section %s [in module %s]"), | |
2246 | get_section_name (info), get_section_file_name (info)); | |
2247 | } | |
2248 | dwarf2_read_section (objfile, containing_section); | |
2249 | /* Other code should have already caught virtual sections that don't | |
2250 | fit. */ | |
2251 | gdb_assert (info->virtual_offset + info->size | |
2252 | <= containing_section->size); | |
2253 | /* If the real section is empty or there was a problem reading the | |
2254 | section we shouldn't get here. */ | |
2255 | gdb_assert (containing_section->buffer != NULL); | |
2256 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2257 | return; | |
2258 | } | |
2259 | ||
4bf44c1c TT |
2260 | /* If the section has relocations, we must read it ourselves. |
2261 | Otherwise we attach it to the BFD. */ | |
2262 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2263 | { |
d521ce57 | 2264 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2265 | return; |
dce234bc | 2266 | } |
dce234bc | 2267 | |
4bf44c1c TT |
2268 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
2269 | info->buffer = buf; | |
dce234bc PP |
2270 | |
2271 | /* When debugging .o files, we may need to apply relocations; see | |
2272 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2273 | We never compress sections in .o files, so we only need to | |
2274 | try this when the section is not compressed. */ | |
ac8035ab | 2275 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2276 | if (retbuf != NULL) |
2277 | { | |
2278 | info->buffer = retbuf; | |
2279 | return; | |
2280 | } | |
2281 | ||
a32a8923 DE |
2282 | abfd = get_section_bfd_owner (info); |
2283 | gdb_assert (abfd != NULL); | |
2284 | ||
dce234bc PP |
2285 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2286 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2287 | { |
2288 | error (_("Dwarf Error: Can't read DWARF data" | |
2289 | " in section %s [in module %s]"), | |
2290 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2291 | } | |
dce234bc PP |
2292 | } |
2293 | ||
9e0ac564 TT |
2294 | /* A helper function that returns the size of a section in a safe way. |
2295 | If you are positive that the section has been read before using the | |
2296 | size, then it is safe to refer to the dwarf2_section_info object's | |
2297 | "size" field directly. In other cases, you must call this | |
2298 | function, because for compressed sections the size field is not set | |
2299 | correctly until the section has been read. */ | |
2300 | ||
2301 | static bfd_size_type | |
2302 | dwarf2_section_size (struct objfile *objfile, | |
2303 | struct dwarf2_section_info *info) | |
2304 | { | |
2305 | if (!info->readin) | |
2306 | dwarf2_read_section (objfile, info); | |
2307 | return info->size; | |
2308 | } | |
2309 | ||
dce234bc | 2310 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2311 | SECTION_NAME. */ |
af34e669 | 2312 | |
dce234bc | 2313 | void |
3017a003 TG |
2314 | dwarf2_get_section_info (struct objfile *objfile, |
2315 | enum dwarf2_section_enum sect, | |
d521ce57 | 2316 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2317 | bfd_size_type *sizep) |
2318 | { | |
2319 | struct dwarf2_per_objfile *data | |
2320 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
2321 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
2322 | |
2323 | /* We may see an objfile without any DWARF, in which case we just | |
2324 | return nothing. */ | |
2325 | if (data == NULL) | |
2326 | { | |
2327 | *sectp = NULL; | |
2328 | *bufp = NULL; | |
2329 | *sizep = 0; | |
2330 | return; | |
2331 | } | |
3017a003 TG |
2332 | switch (sect) |
2333 | { | |
2334 | case DWARF2_DEBUG_FRAME: | |
2335 | info = &data->frame; | |
2336 | break; | |
2337 | case DWARF2_EH_FRAME: | |
2338 | info = &data->eh_frame; | |
2339 | break; | |
2340 | default: | |
2341 | gdb_assert_not_reached ("unexpected section"); | |
2342 | } | |
dce234bc | 2343 | |
9e0ac564 | 2344 | dwarf2_read_section (objfile, info); |
dce234bc | 2345 | |
a32a8923 | 2346 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2347 | *bufp = info->buffer; |
2348 | *sizep = info->size; | |
2349 | } | |
2350 | ||
36586728 TT |
2351 | /* A helper function to find the sections for a .dwz file. */ |
2352 | ||
2353 | static void | |
2354 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2355 | { | |
2356 | struct dwz_file *dwz_file = arg; | |
2357 | ||
2358 | /* Note that we only support the standard ELF names, because .dwz | |
2359 | is ELF-only (at the time of writing). */ | |
2360 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2361 | { | |
73869dc2 | 2362 | dwz_file->abbrev.s.asection = sectp; |
36586728 TT |
2363 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2364 | } | |
2365 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2366 | { | |
73869dc2 | 2367 | dwz_file->info.s.asection = sectp; |
36586728 TT |
2368 | dwz_file->info.size = bfd_get_section_size (sectp); |
2369 | } | |
2370 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2371 | { | |
73869dc2 | 2372 | dwz_file->str.s.asection = sectp; |
36586728 TT |
2373 | dwz_file->str.size = bfd_get_section_size (sectp); |
2374 | } | |
2375 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2376 | { | |
73869dc2 | 2377 | dwz_file->line.s.asection = sectp; |
36586728 TT |
2378 | dwz_file->line.size = bfd_get_section_size (sectp); |
2379 | } | |
2380 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2381 | { | |
73869dc2 | 2382 | dwz_file->macro.s.asection = sectp; |
36586728 TT |
2383 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2384 | } | |
2ec9a5e0 TT |
2385 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2386 | { | |
73869dc2 | 2387 | dwz_file->gdb_index.s.asection = sectp; |
2ec9a5e0 TT |
2388 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2389 | } | |
36586728 TT |
2390 | } |
2391 | ||
4db1a1dc TT |
2392 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2393 | there is no .gnu_debugaltlink section in the file. Error if there | |
2394 | is such a section but the file cannot be found. */ | |
36586728 TT |
2395 | |
2396 | static struct dwz_file * | |
2397 | dwarf2_get_dwz_file (void) | |
2398 | { | |
4db1a1dc TT |
2399 | bfd *dwz_bfd; |
2400 | char *data; | |
36586728 TT |
2401 | struct cleanup *cleanup; |
2402 | const char *filename; | |
2403 | struct dwz_file *result; | |
acd13123 | 2404 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2405 | size_t buildid_len; |
2406 | bfd_byte *buildid; | |
36586728 TT |
2407 | |
2408 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2409 | return dwarf2_per_objfile->dwz_file; | |
2410 | ||
4db1a1dc TT |
2411 | bfd_set_error (bfd_error_no_error); |
2412 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2413 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2414 | if (data == NULL) |
2415 | { | |
2416 | if (bfd_get_error () == bfd_error_no_error) | |
2417 | return NULL; | |
2418 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2419 | bfd_errmsg (bfd_get_error ())); | |
2420 | } | |
36586728 | 2421 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2422 | make_cleanup (xfree, buildid); |
36586728 | 2423 | |
acd13123 TT |
2424 | buildid_len = (size_t) buildid_len_arg; |
2425 | ||
f9d83a0b | 2426 | filename = (const char *) data; |
36586728 TT |
2427 | if (!IS_ABSOLUTE_PATH (filename)) |
2428 | { | |
4262abfb | 2429 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2430 | char *rel; |
2431 | ||
2432 | make_cleanup (xfree, abs); | |
2433 | abs = ldirname (abs); | |
2434 | make_cleanup (xfree, abs); | |
2435 | ||
2436 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2437 | make_cleanup (xfree, rel); | |
2438 | filename = rel; | |
2439 | } | |
2440 | ||
dc294be5 TT |
2441 | /* First try the file name given in the section. If that doesn't |
2442 | work, try to use the build-id instead. */ | |
36586728 | 2443 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); |
dc294be5 | 2444 | if (dwz_bfd != NULL) |
36586728 | 2445 | { |
dc294be5 TT |
2446 | if (!build_id_verify (dwz_bfd, buildid_len, buildid)) |
2447 | { | |
2448 | gdb_bfd_unref (dwz_bfd); | |
2449 | dwz_bfd = NULL; | |
2450 | } | |
36586728 TT |
2451 | } |
2452 | ||
dc294be5 TT |
2453 | if (dwz_bfd == NULL) |
2454 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2455 | ||
2456 | if (dwz_bfd == NULL) | |
2457 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2458 | objfile_name (dwarf2_per_objfile->objfile)); | |
2459 | ||
36586728 TT |
2460 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2461 | struct dwz_file); | |
2462 | result->dwz_bfd = dwz_bfd; | |
2463 | ||
2464 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2465 | ||
2466 | do_cleanups (cleanup); | |
2467 | ||
13aaf454 | 2468 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd); |
8d2cc612 | 2469 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2470 | return result; |
2471 | } | |
9291a0cd | 2472 | \f |
7b9f3c50 DE |
2473 | /* DWARF quick_symbols_functions support. */ |
2474 | ||
2475 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2476 | unique line tables, so we maintain a separate table of all .debug_line | |
2477 | derived entries to support the sharing. | |
2478 | All the quick functions need is the list of file names. We discard the | |
2479 | line_header when we're done and don't need to record it here. */ | |
2480 | struct quick_file_names | |
2481 | { | |
094b34ac DE |
2482 | /* The data used to construct the hash key. */ |
2483 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2484 | |
2485 | /* The number of entries in file_names, real_names. */ | |
2486 | unsigned int num_file_names; | |
2487 | ||
2488 | /* The file names from the line table, after being run through | |
2489 | file_full_name. */ | |
2490 | const char **file_names; | |
2491 | ||
2492 | /* The file names from the line table after being run through | |
2493 | gdb_realpath. These are computed lazily. */ | |
2494 | const char **real_names; | |
2495 | }; | |
2496 | ||
2497 | /* When using the index (and thus not using psymtabs), each CU has an | |
2498 | object of this type. This is used to hold information needed by | |
2499 | the various "quick" methods. */ | |
2500 | struct dwarf2_per_cu_quick_data | |
2501 | { | |
2502 | /* The file table. This can be NULL if there was no file table | |
2503 | or it's currently not read in. | |
2504 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2505 | struct quick_file_names *file_names; | |
2506 | ||
2507 | /* The corresponding symbol table. This is NULL if symbols for this | |
2508 | CU have not yet been read. */ | |
2509 | struct symtab *symtab; | |
2510 | ||
2511 | /* A temporary mark bit used when iterating over all CUs in | |
2512 | expand_symtabs_matching. */ | |
2513 | unsigned int mark : 1; | |
2514 | ||
2515 | /* True if we've tried to read the file table and found there isn't one. | |
2516 | There will be no point in trying to read it again next time. */ | |
2517 | unsigned int no_file_data : 1; | |
2518 | }; | |
2519 | ||
094b34ac DE |
2520 | /* Utility hash function for a stmt_list_hash. */ |
2521 | ||
2522 | static hashval_t | |
2523 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2524 | { | |
2525 | hashval_t v = 0; | |
2526 | ||
2527 | if (stmt_list_hash->dwo_unit != NULL) | |
2528 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2529 | v += stmt_list_hash->line_offset.sect_off; | |
2530 | return v; | |
2531 | } | |
2532 | ||
2533 | /* Utility equality function for a stmt_list_hash. */ | |
2534 | ||
2535 | static int | |
2536 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2537 | const struct stmt_list_hash *rhs) | |
2538 | { | |
2539 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2540 | return 0; | |
2541 | if (lhs->dwo_unit != NULL | |
2542 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2543 | return 0; | |
2544 | ||
2545 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2546 | } | |
2547 | ||
7b9f3c50 DE |
2548 | /* Hash function for a quick_file_names. */ |
2549 | ||
2550 | static hashval_t | |
2551 | hash_file_name_entry (const void *e) | |
2552 | { | |
2553 | const struct quick_file_names *file_data = e; | |
2554 | ||
094b34ac | 2555 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2556 | } |
2557 | ||
2558 | /* Equality function for a quick_file_names. */ | |
2559 | ||
2560 | static int | |
2561 | eq_file_name_entry (const void *a, const void *b) | |
2562 | { | |
2563 | const struct quick_file_names *ea = a; | |
2564 | const struct quick_file_names *eb = b; | |
2565 | ||
094b34ac | 2566 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2567 | } |
2568 | ||
2569 | /* Delete function for a quick_file_names. */ | |
2570 | ||
2571 | static void | |
2572 | delete_file_name_entry (void *e) | |
2573 | { | |
2574 | struct quick_file_names *file_data = e; | |
2575 | int i; | |
2576 | ||
2577 | for (i = 0; i < file_data->num_file_names; ++i) | |
2578 | { | |
2579 | xfree ((void*) file_data->file_names[i]); | |
2580 | if (file_data->real_names) | |
2581 | xfree ((void*) file_data->real_names[i]); | |
2582 | } | |
2583 | ||
2584 | /* The space for the struct itself lives on objfile_obstack, | |
2585 | so we don't free it here. */ | |
2586 | } | |
2587 | ||
2588 | /* Create a quick_file_names hash table. */ | |
2589 | ||
2590 | static htab_t | |
2591 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2592 | { | |
2593 | return htab_create_alloc (nr_initial_entries, | |
2594 | hash_file_name_entry, eq_file_name_entry, | |
2595 | delete_file_name_entry, xcalloc, xfree); | |
2596 | } | |
9291a0cd | 2597 | |
918dd910 JK |
2598 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2599 | have to be created afterwards. You should call age_cached_comp_units after | |
2600 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2601 | ||
2602 | static void | |
2603 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2604 | { | |
3019eac3 | 2605 | if (per_cu->is_debug_types) |
e5fe5e75 | 2606 | load_full_type_unit (per_cu); |
918dd910 | 2607 | else |
95554aad | 2608 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2609 | |
918dd910 | 2610 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2611 | |
2612 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2613 | } |
2614 | ||
a0f42c21 | 2615 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2616 | |
9291a0cd | 2617 | static void |
a0f42c21 | 2618 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2619 | { |
2620 | struct cleanup *back_to; | |
2621 | ||
f4dc4d17 DE |
2622 | /* Skip type_unit_groups, reading the type units they contain |
2623 | is handled elsewhere. */ | |
2624 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2625 | return; | |
2626 | ||
9291a0cd TT |
2627 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2628 | ||
95554aad TT |
2629 | if (dwarf2_per_objfile->using_index |
2630 | ? per_cu->v.quick->symtab == NULL | |
2631 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2632 | { | |
2633 | queue_comp_unit (per_cu, language_minimal); | |
2634 | load_cu (per_cu); | |
89e63ee4 DE |
2635 | |
2636 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2637 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2638 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2639 | if (!per_cu->is_debug_types | |
2640 | && per_cu->cu->dwo_unit != NULL | |
2641 | && dwarf2_per_objfile->index_table != NULL | |
2642 | && dwarf2_per_objfile->index_table->version <= 7 | |
2643 | /* DWP files aren't supported yet. */ | |
2644 | && get_dwp_file () == NULL) | |
2645 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2646 | } |
9291a0cd | 2647 | |
a0f42c21 | 2648 | process_queue (); |
9291a0cd TT |
2649 | |
2650 | /* Age the cache, releasing compilation units that have not | |
2651 | been used recently. */ | |
2652 | age_cached_comp_units (); | |
2653 | ||
2654 | do_cleanups (back_to); | |
2655 | } | |
2656 | ||
2657 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2658 | the objfile from which this CU came. Returns the resulting symbol | |
2659 | table. */ | |
2fdf6df6 | 2660 | |
9291a0cd | 2661 | static struct symtab * |
a0f42c21 | 2662 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2663 | { |
95554aad | 2664 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2665 | if (!per_cu->v.quick->symtab) |
2666 | { | |
2667 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2668 | increment_reading_symtab (); | |
a0f42c21 | 2669 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2670 | process_cu_includes (); |
9291a0cd TT |
2671 | do_cleanups (back_to); |
2672 | } | |
2673 | return per_cu->v.quick->symtab; | |
2674 | } | |
2675 | ||
f4dc4d17 DE |
2676 | /* Return the CU given its index. |
2677 | ||
2678 | This is intended for loops like: | |
2679 | ||
2680 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2681 | + dwarf2_per_objfile->n_type_units); ++i) | |
2682 | { | |
2683 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
2684 | ||
2685 | ...; | |
2686 | } | |
2687 | */ | |
2fdf6df6 | 2688 | |
1fd400ff TT |
2689 | static struct dwarf2_per_cu_data * |
2690 | dw2_get_cu (int index) | |
2691 | { | |
2692 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2693 | { | |
f4dc4d17 | 2694 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2695 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2696 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2697 | } |
2698 | ||
2699 | return dwarf2_per_objfile->all_comp_units[index]; | |
2700 | } | |
2701 | ||
2702 | /* Return the primary CU given its index. | |
2703 | The difference between this function and dw2_get_cu is in the handling | |
2704 | of type units (TUs). Here we return the type_unit_group object. | |
2705 | ||
2706 | This is intended for loops like: | |
2707 | ||
2708 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2709 | + dwarf2_per_objfile->n_type_unit_groups); ++i) | |
2710 | { | |
2711 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); | |
2712 | ||
2713 | ...; | |
2714 | } | |
2715 | */ | |
2716 | ||
2717 | static struct dwarf2_per_cu_data * | |
2718 | dw2_get_primary_cu (int index) | |
2719 | { | |
2720 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2721 | { | |
1fd400ff | 2722 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2723 | gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups); |
2724 | return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu; | |
1fd400ff | 2725 | } |
f4dc4d17 | 2726 | |
1fd400ff TT |
2727 | return dwarf2_per_objfile->all_comp_units[index]; |
2728 | } | |
2729 | ||
2ec9a5e0 TT |
2730 | /* A helper for create_cus_from_index that handles a given list of |
2731 | CUs. */ | |
2fdf6df6 | 2732 | |
74a0d9f6 | 2733 | static void |
2ec9a5e0 TT |
2734 | create_cus_from_index_list (struct objfile *objfile, |
2735 | const gdb_byte *cu_list, offset_type n_elements, | |
2736 | struct dwarf2_section_info *section, | |
2737 | int is_dwz, | |
2738 | int base_offset) | |
9291a0cd TT |
2739 | { |
2740 | offset_type i; | |
9291a0cd | 2741 | |
2ec9a5e0 | 2742 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2743 | { |
2744 | struct dwarf2_per_cu_data *the_cu; | |
2745 | ULONGEST offset, length; | |
2746 | ||
74a0d9f6 JK |
2747 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2748 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2749 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2750 | cu_list += 2 * 8; |
2751 | ||
2752 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2753 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2754 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2755 | the_cu->length = length; |
2756 | the_cu->objfile = objfile; | |
8a0459fd | 2757 | the_cu->section = section; |
9291a0cd TT |
2758 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2759 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2760 | the_cu->is_dwz = is_dwz; |
2761 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2762 | } |
9291a0cd TT |
2763 | } |
2764 | ||
2ec9a5e0 | 2765 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2766 | the CU objects for this objfile. */ |
2ec9a5e0 | 2767 | |
74a0d9f6 | 2768 | static void |
2ec9a5e0 TT |
2769 | create_cus_from_index (struct objfile *objfile, |
2770 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2771 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2772 | { | |
2773 | struct dwz_file *dwz; | |
2774 | ||
2775 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2776 | dwarf2_per_objfile->all_comp_units | |
2777 | = obstack_alloc (&objfile->objfile_obstack, | |
2778 | dwarf2_per_objfile->n_comp_units | |
2779 | * sizeof (struct dwarf2_per_cu_data *)); | |
2780 | ||
74a0d9f6 JK |
2781 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2782 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2783 | |
2784 | if (dwz_elements == 0) | |
74a0d9f6 | 2785 | return; |
2ec9a5e0 TT |
2786 | |
2787 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2788 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2789 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2790 | } |
2791 | ||
1fd400ff | 2792 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2793 | |
74a0d9f6 | 2794 | static void |
673bfd45 | 2795 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2796 | struct dwarf2_section_info *section, |
673bfd45 DE |
2797 | const gdb_byte *bytes, |
2798 | offset_type elements) | |
1fd400ff TT |
2799 | { |
2800 | offset_type i; | |
673bfd45 | 2801 | htab_t sig_types_hash; |
1fd400ff | 2802 | |
d467dd73 DE |
2803 | dwarf2_per_objfile->n_type_units = elements / 3; |
2804 | dwarf2_per_objfile->all_type_units | |
a2ce51a0 DE |
2805 | = xmalloc (dwarf2_per_objfile->n_type_units |
2806 | * sizeof (struct signatured_type *)); | |
1fd400ff | 2807 | |
673bfd45 | 2808 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2809 | |
2810 | for (i = 0; i < elements; i += 3) | |
2811 | { | |
52dc124a DE |
2812 | struct signatured_type *sig_type; |
2813 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2814 | void **slot; |
2815 | ||
74a0d9f6 JK |
2816 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2817 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2818 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2819 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2820 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2821 | bytes += 3 * 8; | |
2822 | ||
52dc124a | 2823 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2824 | struct signatured_type); |
52dc124a | 2825 | sig_type->signature = signature; |
3019eac3 DE |
2826 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2827 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2828 | sig_type->per_cu.section = section; |
52dc124a DE |
2829 | sig_type->per_cu.offset.sect_off = offset; |
2830 | sig_type->per_cu.objfile = objfile; | |
2831 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2832 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2833 | struct dwarf2_per_cu_quick_data); | |
2834 | ||
52dc124a DE |
2835 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2836 | *slot = sig_type; | |
1fd400ff | 2837 | |
b4dd5633 | 2838 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2839 | } |
2840 | ||
673bfd45 | 2841 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2842 | } |
2843 | ||
9291a0cd TT |
2844 | /* Read the address map data from the mapped index, and use it to |
2845 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2846 | |
9291a0cd TT |
2847 | static void |
2848 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2849 | { | |
2850 | const gdb_byte *iter, *end; | |
2851 | struct obstack temp_obstack; | |
2852 | struct addrmap *mutable_map; | |
2853 | struct cleanup *cleanup; | |
2854 | CORE_ADDR baseaddr; | |
2855 | ||
2856 | obstack_init (&temp_obstack); | |
2857 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2858 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2859 | ||
2860 | iter = index->address_table; | |
2861 | end = iter + index->address_table_size; | |
2862 | ||
2863 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2864 | ||
2865 | while (iter < end) | |
2866 | { | |
2867 | ULONGEST hi, lo, cu_index; | |
2868 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2869 | iter += 8; | |
2870 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2871 | iter += 8; | |
2872 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2873 | iter += 4; | |
f652bce2 | 2874 | |
24a55014 | 2875 | if (lo > hi) |
f652bce2 | 2876 | { |
24a55014 DE |
2877 | complaint (&symfile_complaints, |
2878 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2879 | hex_string (lo), hex_string (hi)); |
24a55014 | 2880 | continue; |
f652bce2 | 2881 | } |
24a55014 DE |
2882 | |
2883 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2884 | { |
2885 | complaint (&symfile_complaints, | |
2886 | _(".gdb_index address table has invalid CU number %u"), | |
2887 | (unsigned) cu_index); | |
24a55014 | 2888 | continue; |
f652bce2 | 2889 | } |
24a55014 DE |
2890 | |
2891 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
2892 | dw2_get_cu (cu_index)); | |
9291a0cd TT |
2893 | } |
2894 | ||
2895 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2896 | &objfile->objfile_obstack); | |
2897 | do_cleanups (cleanup); | |
2898 | } | |
2899 | ||
59d7bcaf JK |
2900 | /* The hash function for strings in the mapped index. This is the same as |
2901 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2902 | implementation. This is necessary because the hash function is tied to the | |
2903 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2904 | SYMBOL_HASH_NEXT. |
2905 | ||
2906 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2907 | |
9291a0cd | 2908 | static hashval_t |
559a7a62 | 2909 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2910 | { |
2911 | const unsigned char *str = (const unsigned char *) p; | |
2912 | hashval_t r = 0; | |
2913 | unsigned char c; | |
2914 | ||
2915 | while ((c = *str++) != 0) | |
559a7a62 JK |
2916 | { |
2917 | if (index_version >= 5) | |
2918 | c = tolower (c); | |
2919 | r = r * 67 + c - 113; | |
2920 | } | |
9291a0cd TT |
2921 | |
2922 | return r; | |
2923 | } | |
2924 | ||
2925 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2926 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2927 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2928 | |
9291a0cd TT |
2929 | static int |
2930 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2931 | offset_type **vec_out) | |
2932 | { | |
0cf03b49 JK |
2933 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2934 | offset_type hash; | |
9291a0cd | 2935 | offset_type slot, step; |
559a7a62 | 2936 | int (*cmp) (const char *, const char *); |
9291a0cd | 2937 | |
0cf03b49 JK |
2938 | if (current_language->la_language == language_cplus |
2939 | || current_language->la_language == language_java | |
2940 | || current_language->la_language == language_fortran) | |
2941 | { | |
2942 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2943 | not contain any. */ | |
2944 | const char *paren = strchr (name, '('); | |
2945 | ||
2946 | if (paren) | |
2947 | { | |
2948 | char *dup; | |
2949 | ||
2950 | dup = xmalloc (paren - name + 1); | |
2951 | memcpy (dup, name, paren - name); | |
2952 | dup[paren - name] = 0; | |
2953 | ||
2954 | make_cleanup (xfree, dup); | |
2955 | name = dup; | |
2956 | } | |
2957 | } | |
2958 | ||
559a7a62 | 2959 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2960 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2961 | simulate our NAME being searched is also lowercased. */ |
2962 | hash = mapped_index_string_hash ((index->version == 4 | |
2963 | && case_sensitivity == case_sensitive_off | |
2964 | ? 5 : index->version), | |
2965 | name); | |
2966 | ||
3876f04e DE |
2967 | slot = hash & (index->symbol_table_slots - 1); |
2968 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2969 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2970 | |
2971 | for (;;) | |
2972 | { | |
2973 | /* Convert a slot number to an offset into the table. */ | |
2974 | offset_type i = 2 * slot; | |
2975 | const char *str; | |
3876f04e | 2976 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2977 | { |
2978 | do_cleanups (back_to); | |
2979 | return 0; | |
2980 | } | |
9291a0cd | 2981 | |
3876f04e | 2982 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2983 | if (!cmp (name, str)) |
9291a0cd TT |
2984 | { |
2985 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2986 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2987 | do_cleanups (back_to); |
9291a0cd TT |
2988 | return 1; |
2989 | } | |
2990 | ||
3876f04e | 2991 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2992 | } |
2993 | } | |
2994 | ||
2ec9a5e0 TT |
2995 | /* A helper function that reads the .gdb_index from SECTION and fills |
2996 | in MAP. FILENAME is the name of the file containing the section; | |
2997 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2998 | ok to use deprecated sections. | |
2999 | ||
3000 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3001 | out parameters that are filled in with information about the CU and | |
3002 | TU lists in the section. | |
3003 | ||
3004 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3005 | |
9291a0cd | 3006 | static int |
2ec9a5e0 TT |
3007 | read_index_from_section (struct objfile *objfile, |
3008 | const char *filename, | |
3009 | int deprecated_ok, | |
3010 | struct dwarf2_section_info *section, | |
3011 | struct mapped_index *map, | |
3012 | const gdb_byte **cu_list, | |
3013 | offset_type *cu_list_elements, | |
3014 | const gdb_byte **types_list, | |
3015 | offset_type *types_list_elements) | |
9291a0cd | 3016 | { |
948f8e3d | 3017 | const gdb_byte *addr; |
2ec9a5e0 | 3018 | offset_type version; |
b3b272e1 | 3019 | offset_type *metadata; |
1fd400ff | 3020 | int i; |
9291a0cd | 3021 | |
2ec9a5e0 | 3022 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3023 | return 0; |
82430852 JK |
3024 | |
3025 | /* Older elfutils strip versions could keep the section in the main | |
3026 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3027 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3028 | return 0; |
3029 | ||
2ec9a5e0 | 3030 | dwarf2_read_section (objfile, section); |
9291a0cd | 3031 | |
2ec9a5e0 | 3032 | addr = section->buffer; |
9291a0cd | 3033 | /* Version check. */ |
1fd400ff | 3034 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3035 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3036 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3037 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3038 | indices. */ |
831adc1f | 3039 | if (version < 4) |
481860b3 GB |
3040 | { |
3041 | static int warning_printed = 0; | |
3042 | if (!warning_printed) | |
3043 | { | |
3044 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3045 | filename); |
481860b3 GB |
3046 | warning_printed = 1; |
3047 | } | |
3048 | return 0; | |
3049 | } | |
3050 | /* Index version 4 uses a different hash function than index version | |
3051 | 5 and later. | |
3052 | ||
3053 | Versions earlier than 6 did not emit psymbols for inlined | |
3054 | functions. Using these files will cause GDB not to be able to | |
3055 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3056 | indices unless the user has done |
3057 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3058 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3059 | { |
3060 | static int warning_printed = 0; | |
3061 | if (!warning_printed) | |
3062 | { | |
e615022a DE |
3063 | warning (_("\ |
3064 | Skipping deprecated .gdb_index section in %s.\n\ | |
3065 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3066 | to use the section anyway."), | |
2ec9a5e0 | 3067 | filename); |
481860b3 GB |
3068 | warning_printed = 1; |
3069 | } | |
3070 | return 0; | |
3071 | } | |
796a7ff8 | 3072 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3073 | of the TU (for symbols coming from TUs), |
3074 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3075 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3076 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3077 | These are just performance bugs, and we can't distinguish gdb-generated | |
3078 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3079 | |
481860b3 | 3080 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3081 | longer backward compatible. */ |
796a7ff8 | 3082 | if (version > 8) |
594e8718 | 3083 | return 0; |
9291a0cd | 3084 | |
559a7a62 | 3085 | map->version = version; |
2ec9a5e0 | 3086 | map->total_size = section->size; |
9291a0cd TT |
3087 | |
3088 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3089 | |
3090 | i = 0; | |
2ec9a5e0 TT |
3091 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3092 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3093 | / 8); | |
1fd400ff TT |
3094 | ++i; |
3095 | ||
2ec9a5e0 TT |
3096 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3097 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3098 | - MAYBE_SWAP (metadata[i])) | |
3099 | / 8); | |
987d643c | 3100 | ++i; |
1fd400ff TT |
3101 | |
3102 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3103 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3104 | - MAYBE_SWAP (metadata[i])); | |
3105 | ++i; | |
3106 | ||
3876f04e DE |
3107 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3108 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3109 | - MAYBE_SWAP (metadata[i])) | |
3110 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3111 | ++i; |
9291a0cd | 3112 | |
f9d83a0b | 3113 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3114 | |
2ec9a5e0 TT |
3115 | return 1; |
3116 | } | |
3117 | ||
3118 | ||
3119 | /* Read the index file. If everything went ok, initialize the "quick" | |
3120 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3121 | ||
3122 | static int | |
3123 | dwarf2_read_index (struct objfile *objfile) | |
3124 | { | |
3125 | struct mapped_index local_map, *map; | |
3126 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3127 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3128 | struct dwz_file *dwz; |
2ec9a5e0 | 3129 | |
4262abfb | 3130 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3131 | use_deprecated_index_sections, |
3132 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3133 | &cu_list, &cu_list_elements, | |
3134 | &types_list, &types_list_elements)) | |
3135 | return 0; | |
3136 | ||
0fefef59 | 3137 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3138 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3139 | return 0; |
3140 | ||
2ec9a5e0 TT |
3141 | /* If there is a .dwz file, read it so we can get its CU list as |
3142 | well. */ | |
4db1a1dc TT |
3143 | dwz = dwarf2_get_dwz_file (); |
3144 | if (dwz != NULL) | |
2ec9a5e0 | 3145 | { |
2ec9a5e0 TT |
3146 | struct mapped_index dwz_map; |
3147 | const gdb_byte *dwz_types_ignore; | |
3148 | offset_type dwz_types_elements_ignore; | |
3149 | ||
3150 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3151 | 1, | |
3152 | &dwz->gdb_index, &dwz_map, | |
3153 | &dwz_list, &dwz_list_elements, | |
3154 | &dwz_types_ignore, | |
3155 | &dwz_types_elements_ignore)) | |
3156 | { | |
3157 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3158 | bfd_get_filename (dwz->dwz_bfd)); | |
3159 | return 0; | |
3160 | } | |
3161 | } | |
3162 | ||
74a0d9f6 JK |
3163 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3164 | dwz_list_elements); | |
1fd400ff | 3165 | |
8b70b953 TT |
3166 | if (types_list_elements) |
3167 | { | |
3168 | struct dwarf2_section_info *section; | |
3169 | ||
3170 | /* We can only handle a single .debug_types when we have an | |
3171 | index. */ | |
3172 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3173 | return 0; | |
3174 | ||
3175 | section = VEC_index (dwarf2_section_info_def, | |
3176 | dwarf2_per_objfile->types, 0); | |
3177 | ||
74a0d9f6 JK |
3178 | create_signatured_type_table_from_index (objfile, section, types_list, |
3179 | types_list_elements); | |
8b70b953 | 3180 | } |
9291a0cd | 3181 | |
2ec9a5e0 TT |
3182 | create_addrmap_from_index (objfile, &local_map); |
3183 | ||
3184 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
3185 | *map = local_map; | |
9291a0cd TT |
3186 | |
3187 | dwarf2_per_objfile->index_table = map; | |
3188 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3189 | dwarf2_per_objfile->quick_file_names_table = |
3190 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3191 | |
3192 | return 1; | |
3193 | } | |
3194 | ||
3195 | /* A helper for the "quick" functions which sets the global | |
3196 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3197 | |
9291a0cd TT |
3198 | static void |
3199 | dw2_setup (struct objfile *objfile) | |
3200 | { | |
3201 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
3202 | gdb_assert (dwarf2_per_objfile); | |
3203 | } | |
3204 | ||
dee91e82 | 3205 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3206 | |
dee91e82 DE |
3207 | static void |
3208 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3209 | const gdb_byte *info_ptr, |
dee91e82 DE |
3210 | struct die_info *comp_unit_die, |
3211 | int has_children, | |
3212 | void *data) | |
9291a0cd | 3213 | { |
dee91e82 DE |
3214 | struct dwarf2_cu *cu = reader->cu; |
3215 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3216 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3217 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3218 | struct line_header *lh; |
9291a0cd | 3219 | struct attribute *attr; |
dee91e82 | 3220 | int i; |
15d034d0 | 3221 | const char *name, *comp_dir; |
7b9f3c50 DE |
3222 | void **slot; |
3223 | struct quick_file_names *qfn; | |
3224 | unsigned int line_offset; | |
9291a0cd | 3225 | |
0186c6a7 DE |
3226 | gdb_assert (! this_cu->is_debug_types); |
3227 | ||
07261596 TT |
3228 | /* Our callers never want to match partial units -- instead they |
3229 | will match the enclosing full CU. */ | |
3230 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3231 | { | |
3232 | this_cu->v.quick->no_file_data = 1; | |
3233 | return; | |
3234 | } | |
3235 | ||
0186c6a7 | 3236 | lh_cu = this_cu; |
7b9f3c50 DE |
3237 | lh = NULL; |
3238 | slot = NULL; | |
3239 | line_offset = 0; | |
dee91e82 DE |
3240 | |
3241 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3242 | if (attr) |
3243 | { | |
7b9f3c50 DE |
3244 | struct quick_file_names find_entry; |
3245 | ||
3246 | line_offset = DW_UNSND (attr); | |
3247 | ||
3248 | /* We may have already read in this line header (TU line header sharing). | |
3249 | If we have we're done. */ | |
094b34ac DE |
3250 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3251 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3252 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3253 | &find_entry, INSERT); | |
3254 | if (*slot != NULL) | |
3255 | { | |
094b34ac | 3256 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 3257 | return; |
7b9f3c50 DE |
3258 | } |
3259 | ||
3019eac3 | 3260 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3261 | } |
3262 | if (lh == NULL) | |
3263 | { | |
094b34ac | 3264 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3265 | return; |
9291a0cd TT |
3266 | } |
3267 | ||
7b9f3c50 | 3268 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
3269 | qfn->hash.dwo_unit = cu->dwo_unit; |
3270 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3271 | gdb_assert (slot != NULL); |
3272 | *slot = qfn; | |
9291a0cd | 3273 | |
dee91e82 | 3274 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3275 | |
7b9f3c50 DE |
3276 | qfn->num_file_names = lh->num_file_names; |
3277 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
3278 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 3279 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3280 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3281 | qfn->real_names = NULL; | |
9291a0cd | 3282 | |
7b9f3c50 | 3283 | free_line_header (lh); |
7b9f3c50 | 3284 | |
094b34ac | 3285 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3286 | } |
3287 | ||
3288 | /* A helper for the "quick" functions which attempts to read the line | |
3289 | table for THIS_CU. */ | |
3290 | ||
3291 | static struct quick_file_names * | |
e4a48d9d | 3292 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3293 | { |
0186c6a7 DE |
3294 | /* This should never be called for TUs. */ |
3295 | gdb_assert (! this_cu->is_debug_types); | |
3296 | /* Nor type unit groups. */ | |
3297 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3298 | |
dee91e82 DE |
3299 | if (this_cu->v.quick->file_names != NULL) |
3300 | return this_cu->v.quick->file_names; | |
3301 | /* If we know there is no line data, no point in looking again. */ | |
3302 | if (this_cu->v.quick->no_file_data) | |
3303 | return NULL; | |
3304 | ||
0186c6a7 | 3305 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3306 | |
3307 | if (this_cu->v.quick->no_file_data) | |
3308 | return NULL; | |
3309 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3310 | } |
3311 | ||
3312 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3313 | real path for a given file name from the line table. */ |
2fdf6df6 | 3314 | |
9291a0cd | 3315 | static const char * |
7b9f3c50 DE |
3316 | dw2_get_real_path (struct objfile *objfile, |
3317 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3318 | { |
7b9f3c50 DE |
3319 | if (qfn->real_names == NULL) |
3320 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
fd0a4d76 | 3321 | qfn->num_file_names, char *); |
9291a0cd | 3322 | |
7b9f3c50 DE |
3323 | if (qfn->real_names[index] == NULL) |
3324 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3325 | |
7b9f3c50 | 3326 | return qfn->real_names[index]; |
9291a0cd TT |
3327 | } |
3328 | ||
3329 | static struct symtab * | |
3330 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3331 | { | |
3332 | int index; | |
ae2de4f8 | 3333 | |
9291a0cd TT |
3334 | dw2_setup (objfile); |
3335 | index = dwarf2_per_objfile->n_comp_units - 1; | |
a0f42c21 | 3336 | return dw2_instantiate_symtab (dw2_get_cu (index)); |
9291a0cd TT |
3337 | } |
3338 | ||
7b9f3c50 DE |
3339 | /* Traversal function for dw2_forget_cached_source_info. */ |
3340 | ||
3341 | static int | |
3342 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3343 | { |
7b9f3c50 | 3344 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3345 | |
7b9f3c50 | 3346 | if (file_data->real_names) |
9291a0cd | 3347 | { |
7b9f3c50 | 3348 | int i; |
9291a0cd | 3349 | |
7b9f3c50 | 3350 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3351 | { |
7b9f3c50 DE |
3352 | xfree ((void*) file_data->real_names[i]); |
3353 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3354 | } |
3355 | } | |
7b9f3c50 DE |
3356 | |
3357 | return 1; | |
3358 | } | |
3359 | ||
3360 | static void | |
3361 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3362 | { | |
3363 | dw2_setup (objfile); | |
3364 | ||
3365 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3366 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3367 | } |
3368 | ||
f8eba3c6 TT |
3369 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3370 | the symtabs and calls the iterator. */ | |
3371 | ||
3372 | static int | |
3373 | dw2_map_expand_apply (struct objfile *objfile, | |
3374 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3375 | const char *name, const char *real_path, |
f8eba3c6 TT |
3376 | int (*callback) (struct symtab *, void *), |
3377 | void *data) | |
3378 | { | |
3379 | struct symtab *last_made = objfile->symtabs; | |
3380 | ||
3381 | /* Don't visit already-expanded CUs. */ | |
3382 | if (per_cu->v.quick->symtab) | |
3383 | return 0; | |
3384 | ||
3385 | /* This may expand more than one symtab, and we want to iterate over | |
3386 | all of them. */ | |
a0f42c21 | 3387 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3388 | |
f5b95b50 | 3389 | return iterate_over_some_symtabs (name, real_path, callback, data, |
f8eba3c6 TT |
3390 | objfile->symtabs, last_made); |
3391 | } | |
3392 | ||
3393 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3394 | ||
9291a0cd | 3395 | static int |
f8eba3c6 | 3396 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3397 | const char *real_path, |
f8eba3c6 TT |
3398 | int (*callback) (struct symtab *, void *), |
3399 | void *data) | |
9291a0cd TT |
3400 | { |
3401 | int i; | |
c011a4f4 | 3402 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3403 | |
3404 | dw2_setup (objfile); | |
ae2de4f8 | 3405 | |
848e3e78 DE |
3406 | /* The rule is CUs specify all the files, including those used by |
3407 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3408 | |
848e3e78 | 3409 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3410 | { |
3411 | int j; | |
f4dc4d17 | 3412 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3413 | struct quick_file_names *file_data; |
9291a0cd | 3414 | |
3d7bb9d9 | 3415 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3416 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3417 | continue; |
3418 | ||
e4a48d9d | 3419 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3420 | if (file_data == NULL) |
9291a0cd TT |
3421 | continue; |
3422 | ||
7b9f3c50 | 3423 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3424 | { |
7b9f3c50 | 3425 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3426 | const char *this_real_name; |
9291a0cd | 3427 | |
af529f8f | 3428 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3429 | { |
f5b95b50 | 3430 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3431 | callback, data)) |
3432 | return 1; | |
288e77a7 | 3433 | continue; |
4aac40c8 | 3434 | } |
9291a0cd | 3435 | |
c011a4f4 DE |
3436 | /* Before we invoke realpath, which can get expensive when many |
3437 | files are involved, do a quick comparison of the basenames. */ | |
3438 | if (! basenames_may_differ | |
3439 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3440 | continue; | |
3441 | ||
da235a7c JK |
3442 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3443 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3444 | { |
da235a7c JK |
3445 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3446 | callback, data)) | |
3447 | return 1; | |
288e77a7 | 3448 | continue; |
da235a7c | 3449 | } |
9291a0cd | 3450 | |
da235a7c JK |
3451 | if (real_path != NULL) |
3452 | { | |
af529f8f JK |
3453 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3454 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3455 | if (this_real_name != NULL |
af529f8f | 3456 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3457 | { |
f5b95b50 | 3458 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3459 | callback, data)) |
3460 | return 1; | |
288e77a7 | 3461 | continue; |
9291a0cd TT |
3462 | } |
3463 | } | |
3464 | } | |
3465 | } | |
3466 | ||
9291a0cd TT |
3467 | return 0; |
3468 | } | |
3469 | ||
da51c347 DE |
3470 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3471 | ||
3472 | struct dw2_symtab_iterator | |
9291a0cd | 3473 | { |
da51c347 DE |
3474 | /* The internalized form of .gdb_index. */ |
3475 | struct mapped_index *index; | |
3476 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3477 | int want_specific_block; | |
3478 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3479 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3480 | int block_index; | |
3481 | /* The kind of symbol we're looking for. */ | |
3482 | domain_enum domain; | |
3483 | /* The list of CUs from the index entry of the symbol, | |
3484 | or NULL if not found. */ | |
3485 | offset_type *vec; | |
3486 | /* The next element in VEC to look at. */ | |
3487 | int next; | |
3488 | /* The number of elements in VEC, or zero if there is no match. */ | |
3489 | int length; | |
8943b874 DE |
3490 | /* Have we seen a global version of the symbol? |
3491 | If so we can ignore all further global instances. | |
3492 | This is to work around gold/15646, inefficient gold-generated | |
3493 | indices. */ | |
3494 | int global_seen; | |
da51c347 | 3495 | }; |
9291a0cd | 3496 | |
da51c347 DE |
3497 | /* Initialize the index symtab iterator ITER. |
3498 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3499 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3500 | |
9291a0cd | 3501 | static void |
da51c347 DE |
3502 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3503 | struct mapped_index *index, | |
3504 | int want_specific_block, | |
3505 | int block_index, | |
3506 | domain_enum domain, | |
3507 | const char *name) | |
3508 | { | |
3509 | iter->index = index; | |
3510 | iter->want_specific_block = want_specific_block; | |
3511 | iter->block_index = block_index; | |
3512 | iter->domain = domain; | |
3513 | iter->next = 0; | |
8943b874 | 3514 | iter->global_seen = 0; |
da51c347 DE |
3515 | |
3516 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3517 | iter->length = MAYBE_SWAP (*iter->vec); | |
3518 | else | |
3519 | { | |
3520 | iter->vec = NULL; | |
3521 | iter->length = 0; | |
3522 | } | |
3523 | } | |
3524 | ||
3525 | /* Return the next matching CU or NULL if there are no more. */ | |
3526 | ||
3527 | static struct dwarf2_per_cu_data * | |
3528 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3529 | { | |
3530 | for ( ; iter->next < iter->length; ++iter->next) | |
3531 | { | |
3532 | offset_type cu_index_and_attrs = | |
3533 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3534 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3535 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3536 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3537 | /* This value is only valid for index versions >= 7. */ | |
3538 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3539 | gdb_index_symbol_kind symbol_kind = | |
3540 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3541 | /* Only check the symbol attributes if they're present. | |
3542 | Indices prior to version 7 don't record them, | |
3543 | and indices >= 7 may elide them for certain symbols | |
3544 | (gold does this). */ | |
3545 | int attrs_valid = | |
3546 | (iter->index->version >= 7 | |
3547 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3548 | ||
3190f0c6 DE |
3549 | /* Don't crash on bad data. */ |
3550 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3551 | + dwarf2_per_objfile->n_type_units)) | |
3552 | { | |
3553 | complaint (&symfile_complaints, | |
3554 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3555 | " [in module %s]"), |
3556 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3557 | continue; |
3558 | } | |
3559 | ||
3560 | per_cu = dw2_get_cu (cu_index); | |
3561 | ||
da51c347 DE |
3562 | /* Skip if already read in. */ |
3563 | if (per_cu->v.quick->symtab) | |
3564 | continue; | |
3565 | ||
8943b874 DE |
3566 | /* Check static vs global. */ |
3567 | if (attrs_valid) | |
3568 | { | |
3569 | if (iter->want_specific_block | |
3570 | && want_static != is_static) | |
3571 | continue; | |
3572 | /* Work around gold/15646. */ | |
3573 | if (!is_static && iter->global_seen) | |
3574 | continue; | |
3575 | if (!is_static) | |
3576 | iter->global_seen = 1; | |
3577 | } | |
da51c347 DE |
3578 | |
3579 | /* Only check the symbol's kind if it has one. */ | |
3580 | if (attrs_valid) | |
3581 | { | |
3582 | switch (iter->domain) | |
3583 | { | |
3584 | case VAR_DOMAIN: | |
3585 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3586 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3587 | /* Some types are also in VAR_DOMAIN. */ | |
3588 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3589 | continue; | |
3590 | break; | |
3591 | case STRUCT_DOMAIN: | |
3592 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3593 | continue; | |
3594 | break; | |
3595 | case LABEL_DOMAIN: | |
3596 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3597 | continue; | |
3598 | break; | |
3599 | default: | |
3600 | break; | |
3601 | } | |
3602 | } | |
3603 | ||
3604 | ++iter->next; | |
3605 | return per_cu; | |
3606 | } | |
3607 | ||
3608 | return NULL; | |
3609 | } | |
3610 | ||
3611 | static struct symtab * | |
3612 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3613 | const char *name, domain_enum domain) | |
9291a0cd | 3614 | { |
da51c347 | 3615 | struct symtab *stab_best = NULL; |
156942c7 DE |
3616 | struct mapped_index *index; |
3617 | ||
9291a0cd TT |
3618 | dw2_setup (objfile); |
3619 | ||
156942c7 DE |
3620 | index = dwarf2_per_objfile->index_table; |
3621 | ||
da51c347 | 3622 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3623 | if (index) |
9291a0cd | 3624 | { |
da51c347 DE |
3625 | struct dw2_symtab_iterator iter; |
3626 | struct dwarf2_per_cu_data *per_cu; | |
3627 | ||
3628 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3629 | |
da51c347 | 3630 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3631 | { |
da51c347 DE |
3632 | struct symbol *sym = NULL; |
3633 | struct symtab *stab = dw2_instantiate_symtab (per_cu); | |
3634 | ||
3635 | /* Some caution must be observed with overloaded functions | |
3636 | and methods, since the index will not contain any overload | |
3637 | information (but NAME might contain it). */ | |
3638 | if (stab->primary) | |
9291a0cd | 3639 | { |
da51c347 DE |
3640 | struct blockvector *bv = BLOCKVECTOR (stab); |
3641 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
156942c7 | 3642 | |
da51c347 DE |
3643 | sym = lookup_block_symbol (block, name, domain); |
3644 | } | |
1fd400ff | 3645 | |
da51c347 DE |
3646 | if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
3647 | { | |
3648 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) | |
3649 | return stab; | |
3650 | ||
3651 | stab_best = stab; | |
9291a0cd | 3652 | } |
da51c347 DE |
3653 | |
3654 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3655 | } |
3656 | } | |
9291a0cd | 3657 | |
da51c347 | 3658 | return stab_best; |
9291a0cd TT |
3659 | } |
3660 | ||
3661 | static void | |
3662 | dw2_print_stats (struct objfile *objfile) | |
3663 | { | |
e4a48d9d | 3664 | int i, total, count; |
9291a0cd TT |
3665 | |
3666 | dw2_setup (objfile); | |
e4a48d9d | 3667 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3668 | count = 0; |
e4a48d9d | 3669 | for (i = 0; i < total; ++i) |
9291a0cd | 3670 | { |
e254ef6a | 3671 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3672 | |
e254ef6a | 3673 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3674 | ++count; |
3675 | } | |
e4a48d9d | 3676 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3677 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3678 | } | |
3679 | ||
779bd270 DE |
3680 | /* This dumps minimal information about the index. |
3681 | It is called via "mt print objfiles". | |
3682 | One use is to verify .gdb_index has been loaded by the | |
3683 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3684 | ||
9291a0cd TT |
3685 | static void |
3686 | dw2_dump (struct objfile *objfile) | |
3687 | { | |
779bd270 DE |
3688 | dw2_setup (objfile); |
3689 | gdb_assert (dwarf2_per_objfile->using_index); | |
3690 | printf_filtered (".gdb_index:"); | |
3691 | if (dwarf2_per_objfile->index_table != NULL) | |
3692 | { | |
3693 | printf_filtered (" version %d\n", | |
3694 | dwarf2_per_objfile->index_table->version); | |
3695 | } | |
3696 | else | |
3697 | printf_filtered (" faked for \"readnow\"\n"); | |
3698 | printf_filtered ("\n"); | |
9291a0cd TT |
3699 | } |
3700 | ||
3701 | static void | |
3189cb12 DE |
3702 | dw2_relocate (struct objfile *objfile, |
3703 | const struct section_offsets *new_offsets, | |
3704 | const struct section_offsets *delta) | |
9291a0cd TT |
3705 | { |
3706 | /* There's nothing to relocate here. */ | |
3707 | } | |
3708 | ||
3709 | static void | |
3710 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3711 | const char *func_name) | |
3712 | { | |
da51c347 DE |
3713 | struct mapped_index *index; |
3714 | ||
3715 | dw2_setup (objfile); | |
3716 | ||
3717 | index = dwarf2_per_objfile->index_table; | |
3718 | ||
3719 | /* index is NULL if OBJF_READNOW. */ | |
3720 | if (index) | |
3721 | { | |
3722 | struct dw2_symtab_iterator iter; | |
3723 | struct dwarf2_per_cu_data *per_cu; | |
3724 | ||
3725 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3726 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3727 | func_name); | |
3728 | ||
3729 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3730 | dw2_instantiate_symtab (per_cu); | |
3731 | } | |
9291a0cd TT |
3732 | } |
3733 | ||
3734 | static void | |
3735 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3736 | { | |
3737 | int i; | |
3738 | ||
3739 | dw2_setup (objfile); | |
1fd400ff TT |
3740 | |
3741 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3742 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3743 | { |
e254ef6a | 3744 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3745 | |
a0f42c21 | 3746 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3747 | } |
3748 | } | |
3749 | ||
3750 | static void | |
652a8996 JK |
3751 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3752 | const char *fullname) | |
9291a0cd TT |
3753 | { |
3754 | int i; | |
3755 | ||
3756 | dw2_setup (objfile); | |
d4637a04 DE |
3757 | |
3758 | /* We don't need to consider type units here. | |
3759 | This is only called for examining code, e.g. expand_line_sal. | |
3760 | There can be an order of magnitude (or more) more type units | |
3761 | than comp units, and we avoid them if we can. */ | |
3762 | ||
3763 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3764 | { |
3765 | int j; | |
e254ef6a | 3766 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3767 | struct quick_file_names *file_data; |
9291a0cd | 3768 | |
3d7bb9d9 | 3769 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3770 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3771 | continue; |
3772 | ||
e4a48d9d | 3773 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3774 | if (file_data == NULL) |
9291a0cd TT |
3775 | continue; |
3776 | ||
7b9f3c50 | 3777 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3778 | { |
652a8996 JK |
3779 | const char *this_fullname = file_data->file_names[j]; |
3780 | ||
3781 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3782 | { |
a0f42c21 | 3783 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3784 | break; |
3785 | } | |
3786 | } | |
3787 | } | |
3788 | } | |
3789 | ||
9291a0cd | 3790 | static void |
ade7ed9e DE |
3791 | dw2_map_matching_symbols (struct objfile *objfile, |
3792 | const char * name, domain_enum namespace, | |
3793 | int global, | |
40658b94 PH |
3794 | int (*callback) (struct block *, |
3795 | struct symbol *, void *), | |
2edb89d3 JK |
3796 | void *data, symbol_compare_ftype *match, |
3797 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3798 | { |
40658b94 | 3799 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3800 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3801 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3802 | } |
3803 | ||
3804 | static void | |
f8eba3c6 TT |
3805 | dw2_expand_symtabs_matching |
3806 | (struct objfile *objfile, | |
206f2a57 DE |
3807 | expand_symtabs_file_matcher_ftype *file_matcher, |
3808 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, | |
f8eba3c6 TT |
3809 | enum search_domain kind, |
3810 | void *data) | |
9291a0cd TT |
3811 | { |
3812 | int i; | |
3813 | offset_type iter; | |
4b5246aa | 3814 | struct mapped_index *index; |
9291a0cd TT |
3815 | |
3816 | dw2_setup (objfile); | |
ae2de4f8 DE |
3817 | |
3818 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3819 | if (!dwarf2_per_objfile->index_table) |
3820 | return; | |
4b5246aa | 3821 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3822 | |
7b08b9eb | 3823 | if (file_matcher != NULL) |
24c79950 TT |
3824 | { |
3825 | struct cleanup *cleanup; | |
3826 | htab_t visited_found, visited_not_found; | |
3827 | ||
3828 | visited_found = htab_create_alloc (10, | |
3829 | htab_hash_pointer, htab_eq_pointer, | |
3830 | NULL, xcalloc, xfree); | |
3831 | cleanup = make_cleanup_htab_delete (visited_found); | |
3832 | visited_not_found = htab_create_alloc (10, | |
3833 | htab_hash_pointer, htab_eq_pointer, | |
3834 | NULL, xcalloc, xfree); | |
3835 | make_cleanup_htab_delete (visited_not_found); | |
3836 | ||
848e3e78 DE |
3837 | /* The rule is CUs specify all the files, including those used by |
3838 | any TU, so there's no need to scan TUs here. */ | |
3839 | ||
3840 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3841 | { |
3842 | int j; | |
f4dc4d17 | 3843 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
24c79950 TT |
3844 | struct quick_file_names *file_data; |
3845 | void **slot; | |
7b08b9eb | 3846 | |
24c79950 | 3847 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3848 | |
24c79950 TT |
3849 | /* We only need to look at symtabs not already expanded. */ |
3850 | if (per_cu->v.quick->symtab) | |
3851 | continue; | |
7b08b9eb | 3852 | |
e4a48d9d | 3853 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3854 | if (file_data == NULL) |
3855 | continue; | |
7b08b9eb | 3856 | |
24c79950 TT |
3857 | if (htab_find (visited_not_found, file_data) != NULL) |
3858 | continue; | |
3859 | else if (htab_find (visited_found, file_data) != NULL) | |
3860 | { | |
3861 | per_cu->v.quick->mark = 1; | |
3862 | continue; | |
3863 | } | |
3864 | ||
3865 | for (j = 0; j < file_data->num_file_names; ++j) | |
3866 | { | |
da235a7c JK |
3867 | const char *this_real_name; |
3868 | ||
fbd9ab74 | 3869 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3870 | { |
3871 | per_cu->v.quick->mark = 1; | |
3872 | break; | |
3873 | } | |
da235a7c JK |
3874 | |
3875 | /* Before we invoke realpath, which can get expensive when many | |
3876 | files are involved, do a quick comparison of the basenames. */ | |
3877 | if (!basenames_may_differ | |
3878 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3879 | data, 1)) | |
3880 | continue; | |
3881 | ||
3882 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3883 | if (file_matcher (this_real_name, data, 0)) | |
3884 | { | |
3885 | per_cu->v.quick->mark = 1; | |
3886 | break; | |
3887 | } | |
24c79950 TT |
3888 | } |
3889 | ||
3890 | slot = htab_find_slot (per_cu->v.quick->mark | |
3891 | ? visited_found | |
3892 | : visited_not_found, | |
3893 | file_data, INSERT); | |
3894 | *slot = file_data; | |
3895 | } | |
3896 | ||
3897 | do_cleanups (cleanup); | |
3898 | } | |
9291a0cd | 3899 | |
3876f04e | 3900 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3901 | { |
3902 | offset_type idx = 2 * iter; | |
3903 | const char *name; | |
3904 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 3905 | int global_seen = 0; |
9291a0cd | 3906 | |
3876f04e | 3907 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3908 | continue; |
3909 | ||
3876f04e | 3910 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3911 | |
206f2a57 | 3912 | if (! (*symbol_matcher) (name, data)) |
9291a0cd TT |
3913 | continue; |
3914 | ||
3915 | /* The name was matched, now expand corresponding CUs that were | |
3916 | marked. */ | |
4b5246aa | 3917 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3918 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3919 | vec_len = MAYBE_SWAP (vec[0]); |
3920 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3921 | { | |
e254ef6a | 3922 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 3923 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
3924 | /* This value is only valid for index versions >= 7. */ |
3925 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
3926 | gdb_index_symbol_kind symbol_kind = |
3927 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3928 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
3929 | /* Only check the symbol attributes if they're present. |
3930 | Indices prior to version 7 don't record them, | |
3931 | and indices >= 7 may elide them for certain symbols | |
3932 | (gold does this). */ | |
3933 | int attrs_valid = | |
3934 | (index->version >= 7 | |
3935 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3936 | ||
8943b874 DE |
3937 | /* Work around gold/15646. */ |
3938 | if (attrs_valid) | |
3939 | { | |
3940 | if (!is_static && global_seen) | |
3941 | continue; | |
3942 | if (!is_static) | |
3943 | global_seen = 1; | |
3944 | } | |
3945 | ||
3190f0c6 DE |
3946 | /* Only check the symbol's kind if it has one. */ |
3947 | if (attrs_valid) | |
156942c7 DE |
3948 | { |
3949 | switch (kind) | |
3950 | { | |
3951 | case VARIABLES_DOMAIN: | |
3952 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3953 | continue; | |
3954 | break; | |
3955 | case FUNCTIONS_DOMAIN: | |
3956 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3957 | continue; | |
3958 | break; | |
3959 | case TYPES_DOMAIN: | |
3960 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3961 | continue; | |
3962 | break; | |
3963 | default: | |
3964 | break; | |
3965 | } | |
3966 | } | |
3967 | ||
3190f0c6 DE |
3968 | /* Don't crash on bad data. */ |
3969 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3970 | + dwarf2_per_objfile->n_type_units)) | |
3971 | { | |
3972 | complaint (&symfile_complaints, | |
3973 | _(".gdb_index entry has bad CU index" | |
4262abfb | 3974 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
3975 | continue; |
3976 | } | |
3977 | ||
156942c7 | 3978 | per_cu = dw2_get_cu (cu_index); |
7b08b9eb | 3979 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3980 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3981 | } |
3982 | } | |
3983 | } | |
3984 | ||
9703b513 TT |
3985 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3986 | symtab. */ | |
3987 | ||
3988 | static struct symtab * | |
3989 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3990 | { | |
3991 | int i; | |
3992 | ||
3993 | if (BLOCKVECTOR (symtab) != NULL | |
3994 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3995 | return symtab; | |
3996 | ||
a3ec0bb1 DE |
3997 | if (symtab->includes == NULL) |
3998 | return NULL; | |
3999 | ||
9703b513 TT |
4000 | for (i = 0; symtab->includes[i]; ++i) |
4001 | { | |
a3ec0bb1 | 4002 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
4003 | |
4004 | s = recursively_find_pc_sect_symtab (s, pc); | |
4005 | if (s != NULL) | |
4006 | return s; | |
4007 | } | |
4008 | ||
4009 | return NULL; | |
4010 | } | |
4011 | ||
9291a0cd TT |
4012 | static struct symtab * |
4013 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
77e371c0 | 4014 | struct bound_minimal_symbol msymbol, |
9291a0cd TT |
4015 | CORE_ADDR pc, |
4016 | struct obj_section *section, | |
4017 | int warn_if_readin) | |
4018 | { | |
4019 | struct dwarf2_per_cu_data *data; | |
9703b513 | 4020 | struct symtab *result; |
9291a0cd TT |
4021 | |
4022 | dw2_setup (objfile); | |
4023 | ||
4024 | if (!objfile->psymtabs_addrmap) | |
4025 | return NULL; | |
4026 | ||
4027 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
4028 | if (!data) | |
4029 | return NULL; | |
4030 | ||
4031 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 4032 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4033 | paddress (get_objfile_arch (objfile), pc)); |
4034 | ||
9703b513 TT |
4035 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
4036 | gdb_assert (result != NULL); | |
4037 | return result; | |
9291a0cd TT |
4038 | } |
4039 | ||
9291a0cd | 4040 | static void |
44b13c5a | 4041 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4042 | void *data, int need_fullname) |
9291a0cd TT |
4043 | { |
4044 | int i; | |
24c79950 TT |
4045 | struct cleanup *cleanup; |
4046 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
4047 | NULL, xcalloc, xfree); | |
9291a0cd | 4048 | |
24c79950 | 4049 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 4050 | dw2_setup (objfile); |
ae2de4f8 | 4051 | |
848e3e78 DE |
4052 | /* The rule is CUs specify all the files, including those used by |
4053 | any TU, so there's no need to scan TUs here. | |
4054 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 4055 | |
848e3e78 | 4056 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 TT |
4057 | { |
4058 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4059 | ||
4060 | if (per_cu->v.quick->symtab) | |
4061 | { | |
4062 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
4063 | INSERT); | |
4064 | ||
4065 | *slot = per_cu->v.quick->file_names; | |
4066 | } | |
4067 | } | |
4068 | ||
848e3e78 | 4069 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4070 | { |
4071 | int j; | |
f4dc4d17 | 4072 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 4073 | struct quick_file_names *file_data; |
24c79950 | 4074 | void **slot; |
9291a0cd | 4075 | |
3d7bb9d9 | 4076 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 4077 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
4078 | continue; |
4079 | ||
e4a48d9d | 4080 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4081 | if (file_data == NULL) |
9291a0cd TT |
4082 | continue; |
4083 | ||
24c79950 TT |
4084 | slot = htab_find_slot (visited, file_data, INSERT); |
4085 | if (*slot) | |
4086 | { | |
4087 | /* Already visited. */ | |
4088 | continue; | |
4089 | } | |
4090 | *slot = file_data; | |
4091 | ||
7b9f3c50 | 4092 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4093 | { |
74e2f255 DE |
4094 | const char *this_real_name; |
4095 | ||
4096 | if (need_fullname) | |
4097 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4098 | else | |
4099 | this_real_name = NULL; | |
7b9f3c50 | 4100 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
4101 | } |
4102 | } | |
24c79950 TT |
4103 | |
4104 | do_cleanups (cleanup); | |
9291a0cd TT |
4105 | } |
4106 | ||
4107 | static int | |
4108 | dw2_has_symbols (struct objfile *objfile) | |
4109 | { | |
4110 | return 1; | |
4111 | } | |
4112 | ||
4113 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4114 | { | |
4115 | dw2_has_symbols, | |
4116 | dw2_find_last_source_symtab, | |
4117 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4118 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4119 | dw2_lookup_symbol, |
9291a0cd TT |
4120 | dw2_print_stats, |
4121 | dw2_dump, | |
4122 | dw2_relocate, | |
4123 | dw2_expand_symtabs_for_function, | |
4124 | dw2_expand_all_symtabs, | |
652a8996 | 4125 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4126 | dw2_map_matching_symbols, |
9291a0cd TT |
4127 | dw2_expand_symtabs_matching, |
4128 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
4129 | dw2_map_symbol_filenames |
4130 | }; | |
4131 | ||
4132 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4133 | file will use psymtabs, or 1 if using the GNU index. */ | |
4134 | ||
4135 | int | |
4136 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4137 | { | |
4138 | /* If we're about to read full symbols, don't bother with the | |
4139 | indices. In this case we also don't care if some other debug | |
4140 | format is making psymtabs, because they are all about to be | |
4141 | expanded anyway. */ | |
4142 | if ((objfile->flags & OBJF_READNOW)) | |
4143 | { | |
4144 | int i; | |
4145 | ||
4146 | dwarf2_per_objfile->using_index = 1; | |
4147 | create_all_comp_units (objfile); | |
0e50663e | 4148 | create_all_type_units (objfile); |
7b9f3c50 DE |
4149 | dwarf2_per_objfile->quick_file_names_table = |
4150 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4151 | |
1fd400ff | 4152 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4153 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4154 | { |
e254ef6a | 4155 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 4156 | |
e254ef6a DE |
4157 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4158 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4159 | } |
4160 | ||
4161 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4162 | these functions will be no-ops because we will have expanded | |
4163 | all symtabs. */ | |
4164 | return 1; | |
4165 | } | |
4166 | ||
4167 | if (dwarf2_read_index (objfile)) | |
4168 | return 1; | |
4169 | ||
9291a0cd TT |
4170 | return 0; |
4171 | } | |
4172 | ||
4173 | \f | |
4174 | ||
dce234bc PP |
4175 | /* Build a partial symbol table. */ |
4176 | ||
4177 | void | |
f29dff0a | 4178 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4179 | { |
c9bf0622 TT |
4180 | volatile struct gdb_exception except; |
4181 | ||
f29dff0a | 4182 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4183 | { |
4184 | init_psymbol_list (objfile, 1024); | |
4185 | } | |
4186 | ||
c9bf0622 TT |
4187 | TRY_CATCH (except, RETURN_MASK_ERROR) |
4188 | { | |
4189 | /* This isn't really ideal: all the data we allocate on the | |
4190 | objfile's obstack is still uselessly kept around. However, | |
4191 | freeing it seems unsafe. */ | |
4192 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
4193 | ||
4194 | dwarf2_build_psymtabs_hard (objfile); | |
4195 | discard_cleanups (cleanups); | |
4196 | } | |
4197 | if (except.reason < 0) | |
4198 | exception_print (gdb_stderr, except); | |
c906108c | 4199 | } |
c906108c | 4200 | |
1ce1cefd DE |
4201 | /* Return the total length of the CU described by HEADER. */ |
4202 | ||
4203 | static unsigned int | |
4204 | get_cu_length (const struct comp_unit_head *header) | |
4205 | { | |
4206 | return header->initial_length_size + header->length; | |
4207 | } | |
4208 | ||
45452591 DE |
4209 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
4210 | ||
4211 | static inline int | |
b64f50a1 | 4212 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 4213 | { |
b64f50a1 | 4214 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 4215 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 4216 | |
b64f50a1 | 4217 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
4218 | } |
4219 | ||
3b80fe9b DE |
4220 | /* Find the base address of the compilation unit for range lists and |
4221 | location lists. It will normally be specified by DW_AT_low_pc. | |
4222 | In DWARF-3 draft 4, the base address could be overridden by | |
4223 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4224 | compilation units with discontinuous ranges. */ | |
4225 | ||
4226 | static void | |
4227 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4228 | { | |
4229 | struct attribute *attr; | |
4230 | ||
4231 | cu->base_known = 0; | |
4232 | cu->base_address = 0; | |
4233 | ||
4234 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4235 | if (attr) | |
4236 | { | |
31aa7e4e | 4237 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4238 | cu->base_known = 1; |
4239 | } | |
4240 | else | |
4241 | { | |
4242 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4243 | if (attr) | |
4244 | { | |
31aa7e4e | 4245 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4246 | cu->base_known = 1; |
4247 | } | |
4248 | } | |
4249 | } | |
4250 | ||
93311388 DE |
4251 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4252 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4253 | by the caller. */ | |
107d2387 | 4254 | |
d521ce57 | 4255 | static const gdb_byte * |
107d2387 | 4256 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4257 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4258 | { |
4259 | int signed_addr; | |
891d2f0b | 4260 | unsigned int bytes_read; |
c764a876 DE |
4261 | |
4262 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4263 | cu_header->initial_length_size = bytes_read; | |
4264 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4265 | info_ptr += bytes_read; |
107d2387 AC |
4266 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4267 | info_ptr += 2; | |
b64f50a1 JK |
4268 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4269 | &bytes_read); | |
613e1657 | 4270 | info_ptr += bytes_read; |
107d2387 AC |
4271 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4272 | info_ptr += 1; | |
4273 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4274 | if (signed_addr < 0) | |
8e65ff28 | 4275 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4276 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4277 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4278 | |
107d2387 AC |
4279 | return info_ptr; |
4280 | } | |
4281 | ||
36586728 TT |
4282 | /* Helper function that returns the proper abbrev section for |
4283 | THIS_CU. */ | |
4284 | ||
4285 | static struct dwarf2_section_info * | |
4286 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4287 | { | |
4288 | struct dwarf2_section_info *abbrev; | |
4289 | ||
4290 | if (this_cu->is_dwz) | |
4291 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4292 | else | |
4293 | abbrev = &dwarf2_per_objfile->abbrev; | |
4294 | ||
4295 | return abbrev; | |
4296 | } | |
4297 | ||
9ff913ba DE |
4298 | /* Subroutine of read_and_check_comp_unit_head and |
4299 | read_and_check_type_unit_head to simplify them. | |
4300 | Perform various error checking on the header. */ | |
4301 | ||
4302 | static void | |
4303 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4304 | struct dwarf2_section_info *section, |
4305 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4306 | { |
a32a8923 DE |
4307 | bfd *abfd = get_section_bfd_owner (section); |
4308 | const char *filename = get_section_file_name (section); | |
9ff913ba DE |
4309 | |
4310 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4311 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4312 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4313 | filename); | |
4314 | ||
b64f50a1 | 4315 | if (header->abbrev_offset.sect_off |
36586728 | 4316 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4317 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4318 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4319 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4320 | filename); |
4321 | ||
4322 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4323 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4324 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4325 | > section->size) |
4326 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4327 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4328 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4329 | filename); |
4330 | } | |
4331 | ||
4332 | /* Read in a CU/TU header and perform some basic error checking. | |
4333 | The contents of the header are stored in HEADER. | |
4334 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4335 | |
d521ce57 | 4336 | static const gdb_byte * |
9ff913ba DE |
4337 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4338 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4339 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4340 | const gdb_byte *info_ptr, |
9ff913ba | 4341 | int is_debug_types_section) |
72bf9492 | 4342 | { |
d521ce57 | 4343 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4344 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4345 | |
b64f50a1 | 4346 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4347 | |
72bf9492 DJ |
4348 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4349 | ||
460c1c54 CC |
4350 | /* If we're reading a type unit, skip over the signature and |
4351 | type_offset fields. */ | |
b0df02fd | 4352 | if (is_debug_types_section) |
460c1c54 CC |
4353 | info_ptr += 8 /*signature*/ + header->offset_size; |
4354 | ||
b64f50a1 | 4355 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4356 | |
4bdcc0c1 | 4357 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4358 | |
4359 | return info_ptr; | |
4360 | } | |
4361 | ||
348e048f DE |
4362 | /* Read in the types comp unit header information from .debug_types entry at |
4363 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4364 | ||
d521ce57 | 4365 | static const gdb_byte * |
9ff913ba DE |
4366 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4367 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4368 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4369 | const gdb_byte *info_ptr, |
dee91e82 DE |
4370 | ULONGEST *signature, |
4371 | cu_offset *type_offset_in_tu) | |
348e048f | 4372 | { |
d521ce57 | 4373 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4374 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4375 | |
b64f50a1 | 4376 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4377 | |
9ff913ba | 4378 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4379 | |
9ff913ba DE |
4380 | /* If we're reading a type unit, skip over the signature and |
4381 | type_offset fields. */ | |
4382 | if (signature != NULL) | |
4383 | *signature = read_8_bytes (abfd, info_ptr); | |
4384 | info_ptr += 8; | |
dee91e82 DE |
4385 | if (type_offset_in_tu != NULL) |
4386 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4387 | header->offset_size); | |
9ff913ba DE |
4388 | info_ptr += header->offset_size; |
4389 | ||
b64f50a1 | 4390 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4391 | |
4bdcc0c1 | 4392 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4393 | |
4394 | return info_ptr; | |
348e048f DE |
4395 | } |
4396 | ||
f4dc4d17 DE |
4397 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4398 | ||
4399 | static sect_offset | |
4400 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4401 | sect_offset offset) | |
4402 | { | |
a32a8923 | 4403 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4404 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4405 | unsigned int length, initial_length_size, offset_size; |
4406 | sect_offset abbrev_offset; | |
4407 | ||
4408 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4409 | info_ptr = section->buffer + offset.sect_off; | |
4410 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4411 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4412 | info_ptr += initial_length_size + 2 /*version*/; | |
4413 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4414 | return abbrev_offset; | |
4415 | } | |
4416 | ||
aaa75496 JB |
4417 | /* Allocate a new partial symtab for file named NAME and mark this new |
4418 | partial symtab as being an include of PST. */ | |
4419 | ||
4420 | static void | |
d521ce57 | 4421 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4422 | struct objfile *objfile) |
4423 | { | |
4424 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4425 | ||
fbd9ab74 JK |
4426 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4427 | { | |
4428 | /* It shares objfile->objfile_obstack. */ | |
4429 | subpst->dirname = pst->dirname; | |
4430 | } | |
4431 | ||
aaa75496 JB |
4432 | subpst->section_offsets = pst->section_offsets; |
4433 | subpst->textlow = 0; | |
4434 | subpst->texthigh = 0; | |
4435 | ||
4436 | subpst->dependencies = (struct partial_symtab **) | |
4437 | obstack_alloc (&objfile->objfile_obstack, | |
4438 | sizeof (struct partial_symtab *)); | |
4439 | subpst->dependencies[0] = pst; | |
4440 | subpst->number_of_dependencies = 1; | |
4441 | ||
4442 | subpst->globals_offset = 0; | |
4443 | subpst->n_global_syms = 0; | |
4444 | subpst->statics_offset = 0; | |
4445 | subpst->n_static_syms = 0; | |
4446 | subpst->symtab = NULL; | |
4447 | subpst->read_symtab = pst->read_symtab; | |
4448 | subpst->readin = 0; | |
4449 | ||
4450 | /* No private part is necessary for include psymtabs. This property | |
4451 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4452 | the regular ones. */ |
58a9656e | 4453 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4454 | } |
4455 | ||
4456 | /* Read the Line Number Program data and extract the list of files | |
4457 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4458 | partial symtab for each of these included files. */ |
aaa75496 JB |
4459 | |
4460 | static void | |
4461 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4462 | struct die_info *die, |
4463 | struct partial_symtab *pst) | |
aaa75496 | 4464 | { |
d85a05f0 DJ |
4465 | struct line_header *lh = NULL; |
4466 | struct attribute *attr; | |
aaa75496 | 4467 | |
d85a05f0 DJ |
4468 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4469 | if (attr) | |
3019eac3 | 4470 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4471 | if (lh == NULL) |
4472 | return; /* No linetable, so no includes. */ | |
4473 | ||
c6da4cef | 4474 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4475 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4476 | |
4477 | free_line_header (lh); | |
4478 | } | |
4479 | ||
348e048f | 4480 | static hashval_t |
52dc124a | 4481 | hash_signatured_type (const void *item) |
348e048f | 4482 | { |
52dc124a | 4483 | const struct signatured_type *sig_type = item; |
9a619af0 | 4484 | |
348e048f | 4485 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4486 | return sig_type->signature; |
348e048f DE |
4487 | } |
4488 | ||
4489 | static int | |
52dc124a | 4490 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4491 | { |
4492 | const struct signatured_type *lhs = item_lhs; | |
4493 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4494 | |
348e048f DE |
4495 | return lhs->signature == rhs->signature; |
4496 | } | |
4497 | ||
1fd400ff TT |
4498 | /* Allocate a hash table for signatured types. */ |
4499 | ||
4500 | static htab_t | |
673bfd45 | 4501 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4502 | { |
4503 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4504 | hash_signatured_type, |
4505 | eq_signatured_type, | |
1fd400ff TT |
4506 | NULL, |
4507 | &objfile->objfile_obstack, | |
4508 | hashtab_obstack_allocate, | |
4509 | dummy_obstack_deallocate); | |
4510 | } | |
4511 | ||
d467dd73 | 4512 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4513 | |
4514 | static int | |
d467dd73 | 4515 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4516 | { |
4517 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4518 | struct signatured_type ***datap = datum; |
1fd400ff | 4519 | |
b4dd5633 | 4520 | **datap = sigt; |
1fd400ff TT |
4521 | ++*datap; |
4522 | ||
4523 | return 1; | |
4524 | } | |
4525 | ||
c88ee1f0 DE |
4526 | /* Create the hash table of all entries in the .debug_types |
4527 | (or .debug_types.dwo) section(s). | |
4528 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4529 | otherwise it is NULL. | |
4530 | ||
4531 | The result is a pointer to the hash table or NULL if there are no types. | |
4532 | ||
4533 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4534 | |
3019eac3 DE |
4535 | static htab_t |
4536 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4537 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4538 | { |
3019eac3 | 4539 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4540 | htab_t types_htab = NULL; |
8b70b953 TT |
4541 | int ix; |
4542 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4543 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4544 | |
3019eac3 DE |
4545 | if (VEC_empty (dwarf2_section_info_def, types)) |
4546 | return NULL; | |
348e048f | 4547 | |
4bdcc0c1 DE |
4548 | abbrev_section = (dwo_file != NULL |
4549 | ? &dwo_file->sections.abbrev | |
4550 | : &dwarf2_per_objfile->abbrev); | |
4551 | ||
09406207 DE |
4552 | if (dwarf2_read_debug) |
4553 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4554 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4555 | get_section_file_name (abbrev_section)); |
09406207 | 4556 | |
8b70b953 | 4557 | for (ix = 0; |
3019eac3 | 4558 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4559 | ++ix) |
4560 | { | |
3019eac3 | 4561 | bfd *abfd; |
d521ce57 | 4562 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4563 | |
8b70b953 TT |
4564 | dwarf2_read_section (objfile, section); |
4565 | info_ptr = section->buffer; | |
348e048f | 4566 | |
8b70b953 TT |
4567 | if (info_ptr == NULL) |
4568 | continue; | |
348e048f | 4569 | |
3019eac3 | 4570 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4571 | not present, in which case the bfd is unknown. */ |
4572 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4573 | |
dee91e82 DE |
4574 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4575 | because we don't need to read any dies: the signature is in the | |
4576 | header. */ | |
8b70b953 TT |
4577 | |
4578 | end_ptr = info_ptr + section->size; | |
4579 | while (info_ptr < end_ptr) | |
4580 | { | |
b64f50a1 | 4581 | sect_offset offset; |
3019eac3 | 4582 | cu_offset type_offset_in_tu; |
8b70b953 | 4583 | ULONGEST signature; |
52dc124a | 4584 | struct signatured_type *sig_type; |
3019eac3 | 4585 | struct dwo_unit *dwo_tu; |
8b70b953 | 4586 | void **slot; |
d521ce57 | 4587 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4588 | struct comp_unit_head header; |
dee91e82 | 4589 | unsigned int length; |
348e048f | 4590 | |
b64f50a1 | 4591 | offset.sect_off = ptr - section->buffer; |
348e048f | 4592 | |
8b70b953 | 4593 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4594 | table, but we don't need anything else just yet. */ |
348e048f | 4595 | |
4bdcc0c1 DE |
4596 | ptr = read_and_check_type_unit_head (&header, section, |
4597 | abbrev_section, ptr, | |
3019eac3 | 4598 | &signature, &type_offset_in_tu); |
6caca83c | 4599 | |
1ce1cefd | 4600 | length = get_cu_length (&header); |
dee91e82 | 4601 | |
6caca83c | 4602 | /* Skip dummy type units. */ |
dee91e82 DE |
4603 | if (ptr >= info_ptr + length |
4604 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4605 | { |
1ce1cefd | 4606 | info_ptr += length; |
6caca83c CC |
4607 | continue; |
4608 | } | |
8b70b953 | 4609 | |
0349ea22 DE |
4610 | if (types_htab == NULL) |
4611 | { | |
4612 | if (dwo_file) | |
4613 | types_htab = allocate_dwo_unit_table (objfile); | |
4614 | else | |
4615 | types_htab = allocate_signatured_type_table (objfile); | |
4616 | } | |
4617 | ||
3019eac3 DE |
4618 | if (dwo_file) |
4619 | { | |
4620 | sig_type = NULL; | |
4621 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4622 | struct dwo_unit); | |
4623 | dwo_tu->dwo_file = dwo_file; | |
4624 | dwo_tu->signature = signature; | |
4625 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4626 | dwo_tu->section = section; |
3019eac3 DE |
4627 | dwo_tu->offset = offset; |
4628 | dwo_tu->length = length; | |
4629 | } | |
4630 | else | |
4631 | { | |
4632 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4633 | The real type_offset is in the DWO file. */ | |
4634 | dwo_tu = NULL; | |
4635 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4636 | struct signatured_type); | |
4637 | sig_type->signature = signature; | |
4638 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4639 | sig_type->per_cu.objfile = objfile; | |
4640 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4641 | sig_type->per_cu.section = section; |
3019eac3 DE |
4642 | sig_type->per_cu.offset = offset; |
4643 | sig_type->per_cu.length = length; | |
4644 | } | |
8b70b953 | 4645 | |
3019eac3 DE |
4646 | slot = htab_find_slot (types_htab, |
4647 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4648 | INSERT); | |
8b70b953 TT |
4649 | gdb_assert (slot != NULL); |
4650 | if (*slot != NULL) | |
4651 | { | |
3019eac3 DE |
4652 | sect_offset dup_offset; |
4653 | ||
4654 | if (dwo_file) | |
4655 | { | |
4656 | const struct dwo_unit *dup_tu = *slot; | |
4657 | ||
4658 | dup_offset = dup_tu->offset; | |
4659 | } | |
4660 | else | |
4661 | { | |
4662 | const struct signatured_type *dup_tu = *slot; | |
4663 | ||
4664 | dup_offset = dup_tu->per_cu.offset; | |
4665 | } | |
b3c8eb43 | 4666 | |
8b70b953 | 4667 | complaint (&symfile_complaints, |
c88ee1f0 | 4668 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4669 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4670 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4671 | hex_string (signature)); |
8b70b953 | 4672 | } |
3019eac3 | 4673 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4674 | |
73be47f5 | 4675 | if (dwarf2_read_debug > 1) |
4031ecc5 | 4676 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4677 | offset.sect_off, |
4031ecc5 | 4678 | hex_string (signature)); |
348e048f | 4679 | |
dee91e82 | 4680 | info_ptr += length; |
8b70b953 | 4681 | } |
348e048f DE |
4682 | } |
4683 | ||
3019eac3 DE |
4684 | return types_htab; |
4685 | } | |
4686 | ||
4687 | /* Create the hash table of all entries in the .debug_types section, | |
4688 | and initialize all_type_units. | |
4689 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4690 | otherwise non-zero. */ | |
4691 | ||
4692 | static int | |
4693 | create_all_type_units (struct objfile *objfile) | |
4694 | { | |
4695 | htab_t types_htab; | |
b4dd5633 | 4696 | struct signatured_type **iter; |
3019eac3 DE |
4697 | |
4698 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4699 | if (types_htab == NULL) | |
4700 | { | |
4701 | dwarf2_per_objfile->signatured_types = NULL; | |
4702 | return 0; | |
4703 | } | |
4704 | ||
348e048f DE |
4705 | dwarf2_per_objfile->signatured_types = types_htab; |
4706 | ||
d467dd73 DE |
4707 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4708 | dwarf2_per_objfile->all_type_units | |
a2ce51a0 DE |
4709 | = xmalloc (dwarf2_per_objfile->n_type_units |
4710 | * sizeof (struct signatured_type *)); | |
d467dd73 DE |
4711 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4712 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4713 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4714 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4715 | |
348e048f DE |
4716 | return 1; |
4717 | } | |
4718 | ||
a2ce51a0 DE |
4719 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4720 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4721 | ||
4722 | static void | |
4723 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4724 | struct signatured_type *sig_entry, | |
4725 | struct dwo_unit *dwo_entry) | |
4726 | { | |
7ee85ab1 | 4727 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4728 | gdb_assert (! sig_entry->per_cu.queued); |
4729 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
4730 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
4731 | gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL); | |
4732 | gdb_assert (sig_entry->signature == dwo_entry->signature); | |
4733 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4734 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4735 | gdb_assert (sig_entry->dwo_unit == NULL); |
4736 | ||
4737 | sig_entry->per_cu.section = dwo_entry->section; | |
4738 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4739 | sig_entry->per_cu.length = dwo_entry->length; | |
4740 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4741 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4742 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4743 | sig_entry->dwo_unit = dwo_entry; | |
4744 | } | |
4745 | ||
4746 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4747 | If we haven't read the TU yet, create the signatured_type data structure |
4748 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4749 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4750 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4751 | containing that CU. Otherwise we could end up reading several other DWO | |
4752 | files (due to comdat folding) to process the transitive closure of all the | |
4753 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4754 | type signature that it needs. | |
a2ce51a0 DE |
4755 | We only do this for .gdb_index because in the psymtab case we already have |
4756 | to read all the DWOs to build the type unit groups. */ | |
4757 | ||
4758 | static struct signatured_type * | |
4759 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4760 | { | |
4761 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4762 | struct dwo_file *dwo_file; | |
4763 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4764 | struct signatured_type find_sig_entry, *sig_entry; | |
4765 | ||
4766 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4767 | ||
4768 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the | |
4769 | dwo_unit of the TU itself. */ | |
4770 | dwo_file = cu->dwo_unit->dwo_file; | |
4771 | ||
4772 | /* We only ever need to read in one copy of a signatured type. | |
4773 | Just use the global signatured_types array. If this is the first time | |
4774 | we're reading this type, replace the recorded data from .gdb_index with | |
4775 | this TU. */ | |
4776 | ||
4777 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4778 | return NULL; | |
4779 | find_sig_entry.signature = sig; | |
4780 | sig_entry = htab_find (dwarf2_per_objfile->signatured_types, &find_sig_entry); | |
4781 | if (sig_entry == NULL) | |
4782 | return NULL; | |
7ee85ab1 DE |
4783 | |
4784 | /* We can get here with the TU already read, *or* in the process of being | |
4785 | read. Don't reassign it if that's the case. Also note that if the TU is | |
4786 | already being read, it may not have come from a DWO, the program may be | |
4787 | a mix of Fission-compiled code and non-Fission-compiled code. */ | |
a2ce51a0 | 4788 | /* Have we already tried to read this TU? */ |
7ee85ab1 | 4789 | if (sig_entry->per_cu.tu_read) |
a2ce51a0 DE |
4790 | return sig_entry; |
4791 | ||
4792 | /* Ok, this is the first time we're reading this TU. */ | |
4793 | if (dwo_file->tus == NULL) | |
4794 | return NULL; | |
4795 | find_dwo_entry.signature = sig; | |
4796 | dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry); | |
4797 | if (dwo_entry == NULL) | |
4798 | return NULL; | |
4799 | ||
4800 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); | |
89e63ee4 | 4801 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4802 | return sig_entry; |
4803 | } | |
4804 | ||
4805 | /* Subroutine of lookup_dwp_signatured_type. | |
4806 | Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */ | |
4807 | ||
4808 | static struct signatured_type * | |
4809 | add_type_unit (ULONGEST sig) | |
4810 | { | |
4811 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4812 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4813 | struct signatured_type *sig_type; | |
4814 | void **slot; | |
4815 | ||
4816 | ++n_type_units; | |
4817 | dwarf2_per_objfile->all_type_units = | |
4818 | xrealloc (dwarf2_per_objfile->all_type_units, | |
4819 | n_type_units * sizeof (struct signatured_type *)); | |
4820 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4821 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4822 | struct signatured_type); | |
4823 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4824 | sig_type->signature = sig; | |
4825 | sig_type->per_cu.is_debug_types = 1; | |
4826 | sig_type->per_cu.v.quick = | |
4827 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4828 | struct dwarf2_per_cu_quick_data); | |
4829 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4830 | sig_type, INSERT); | |
4831 | gdb_assert (*slot == NULL); | |
4832 | *slot = sig_type; | |
4833 | /* The rest of sig_type must be filled in by the caller. */ | |
4834 | return sig_type; | |
4835 | } | |
4836 | ||
4837 | /* Subroutine of lookup_signatured_type. | |
4838 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
4839 | then try the DWP file. | |
4840 | Normally this "can't happen", but if there's a bug in signature | |
4841 | generation and/or the DWP file is built incorrectly, it can happen. | |
4842 | Using the type directly from the DWP file means we don't have the stub | |
4843 | which has some useful attributes (e.g., DW_AT_comp_dir), but they're | |
4844 | not critical. [Eventually the stub may go away for type units anyway.] */ | |
4845 | ||
4846 | static struct signatured_type * | |
4847 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4848 | { | |
4849 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4850 | struct dwp_file *dwp_file = get_dwp_file (); | |
4851 | struct dwo_unit *dwo_entry; | |
4852 | struct signatured_type find_sig_entry, *sig_entry; | |
4853 | ||
4854 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4855 | gdb_assert (dwp_file != NULL); | |
4856 | ||
4857 | if (dwarf2_per_objfile->signatured_types != NULL) | |
4858 | { | |
4859 | find_sig_entry.signature = sig; | |
4860 | sig_entry = htab_find (dwarf2_per_objfile->signatured_types, | |
4861 | &find_sig_entry); | |
4862 | if (sig_entry != NULL) | |
4863 | return sig_entry; | |
4864 | } | |
4865 | ||
4866 | /* This is the "shouldn't happen" case. | |
4867 | Try the DWP file and hope for the best. */ | |
4868 | if (dwp_file->tus == NULL) | |
4869 | return NULL; | |
57d63ce2 DE |
4870 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
4871 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
4872 | if (dwo_entry == NULL) |
4873 | return NULL; | |
4874 | ||
4875 | sig_entry = add_type_unit (sig); | |
4876 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); | |
4877 | ||
4878 | /* The caller will signal a complaint if we return NULL. | |
4879 | Here we don't return NULL but we still want to complain. */ | |
4880 | complaint (&symfile_complaints, | |
4881 | _("Bad type signature %s referenced by %s at 0x%x," | |
4882 | " coping by using copy in DWP [in module %s]"), | |
4883 | hex_string (sig), | |
4884 | cu->per_cu->is_debug_types ? "TU" : "CU", | |
4885 | cu->per_cu->offset.sect_off, | |
4262abfb | 4886 | objfile_name (objfile)); |
a2ce51a0 DE |
4887 | |
4888 | return sig_entry; | |
4889 | } | |
4890 | ||
380bca97 | 4891 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
4892 | Returns NULL if signature SIG is not present in the table. |
4893 | It is up to the caller to complain about this. */ | |
348e048f DE |
4894 | |
4895 | static struct signatured_type * | |
a2ce51a0 | 4896 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 4897 | { |
a2ce51a0 DE |
4898 | if (cu->dwo_unit |
4899 | && dwarf2_per_objfile->using_index) | |
4900 | { | |
4901 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
4902 | These cases require special processing. */ | |
4903 | if (get_dwp_file () == NULL) | |
4904 | return lookup_dwo_signatured_type (cu, sig); | |
4905 | else | |
4906 | return lookup_dwp_signatured_type (cu, sig); | |
4907 | } | |
4908 | else | |
4909 | { | |
4910 | struct signatured_type find_entry, *entry; | |
348e048f | 4911 | |
a2ce51a0 DE |
4912 | if (dwarf2_per_objfile->signatured_types == NULL) |
4913 | return NULL; | |
4914 | find_entry.signature = sig; | |
4915 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4916 | return entry; | |
4917 | } | |
348e048f | 4918 | } |
42e7ad6c DE |
4919 | \f |
4920 | /* Low level DIE reading support. */ | |
348e048f | 4921 | |
d85a05f0 DJ |
4922 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4923 | ||
4924 | static void | |
4925 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4926 | struct dwarf2_cu *cu, |
3019eac3 DE |
4927 | struct dwarf2_section_info *section, |
4928 | struct dwo_file *dwo_file) | |
d85a05f0 | 4929 | { |
fceca515 | 4930 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 4931 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 4932 | reader->cu = cu; |
3019eac3 | 4933 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4934 | reader->die_section = section; |
4935 | reader->buffer = section->buffer; | |
f664829e | 4936 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 4937 | reader->comp_dir = NULL; |
d85a05f0 DJ |
4938 | } |
4939 | ||
b0c7bfa9 DE |
4940 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4941 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
4942 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
4943 | already. | |
4944 | ||
4945 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
4946 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
4947 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
4948 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
4949 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
4950 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
4951 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
4952 | are filled in with the info of the DIE from the DWO file. | |
4953 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
4954 | provided an abbrev table to use. | |
4955 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
4956 | ||
4957 | static int | |
4958 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
4959 | struct dwo_unit *dwo_unit, | |
4960 | int abbrev_table_provided, | |
4961 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 4962 | const char *stub_comp_dir, |
b0c7bfa9 | 4963 | struct die_reader_specs *result_reader, |
d521ce57 | 4964 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
4965 | struct die_info **result_comp_unit_die, |
4966 | int *result_has_children) | |
4967 | { | |
4968 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4969 | struct dwarf2_cu *cu = this_cu->cu; | |
4970 | struct dwarf2_section_info *section; | |
4971 | bfd *abfd; | |
d521ce57 | 4972 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
4973 | ULONGEST signature; /* Or dwo_id. */ |
4974 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
4975 | int i,num_extra_attrs; | |
4976 | struct dwarf2_section_info *dwo_abbrev_section; | |
4977 | struct attribute *attr; | |
4978 | struct die_info *comp_unit_die; | |
4979 | ||
b0aeadb3 DE |
4980 | /* At most one of these may be provided. */ |
4981 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 4982 | |
b0c7bfa9 DE |
4983 | /* These attributes aren't processed until later: |
4984 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
4985 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
4986 | referenced later. However, these attributes are found in the stub | |
4987 | which we won't have later. In order to not impose this complication | |
4988 | on the rest of the code, we read them here and copy them to the | |
4989 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
4990 | |
4991 | stmt_list = NULL; | |
4992 | low_pc = NULL; | |
4993 | high_pc = NULL; | |
4994 | ranges = NULL; | |
4995 | comp_dir = NULL; | |
4996 | ||
4997 | if (stub_comp_unit_die != NULL) | |
4998 | { | |
4999 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5000 | DWO file. */ | |
5001 | if (! this_cu->is_debug_types) | |
5002 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5003 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5004 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5005 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5006 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5007 | ||
5008 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5009 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5010 | cu->addr_base = 0; | |
5011 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5012 | if (attr) | |
5013 | cu->addr_base = DW_UNSND (attr); | |
5014 | ||
5015 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5016 | We need the value before we can process DW_AT_ranges. */ | |
5017 | cu->ranges_base = 0; | |
5018 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5019 | if (attr) | |
5020 | cu->ranges_base = DW_UNSND (attr); | |
5021 | } | |
a2ce51a0 DE |
5022 | else if (stub_comp_dir != NULL) |
5023 | { | |
5024 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
5025 | comp_dir = (struct attribute *) | |
5026 | obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir)); | |
5027 | comp_dir->name = DW_AT_comp_dir; | |
5028 | comp_dir->form = DW_FORM_string; | |
5029 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5030 | DW_STRING (comp_dir) = stub_comp_dir; | |
5031 | } | |
b0c7bfa9 DE |
5032 | |
5033 | /* Set up for reading the DWO CU/TU. */ | |
5034 | cu->dwo_unit = dwo_unit; | |
5035 | section = dwo_unit->section; | |
5036 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5037 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
5038 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
5039 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
5040 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5041 | ||
5042 | if (this_cu->is_debug_types) | |
5043 | { | |
5044 | ULONGEST header_signature; | |
5045 | cu_offset type_offset_in_tu; | |
5046 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
5047 | ||
5048 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
5049 | dwo_abbrev_section, | |
5050 | info_ptr, | |
5051 | &header_signature, | |
5052 | &type_offset_in_tu); | |
a2ce51a0 DE |
5053 | /* This is not an assert because it can be caused by bad debug info. */ |
5054 | if (sig_type->signature != header_signature) | |
5055 | { | |
5056 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5057 | " TU at offset 0x%x [in module %s]"), | |
5058 | hex_string (sig_type->signature), | |
5059 | hex_string (header_signature), | |
5060 | dwo_unit->offset.sect_off, | |
5061 | bfd_get_filename (abfd)); | |
5062 | } | |
b0c7bfa9 DE |
5063 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
5064 | /* For DWOs coming from DWP files, we don't know the CU length | |
5065 | nor the type's offset in the TU until now. */ | |
5066 | dwo_unit->length = get_cu_length (&cu->header); | |
5067 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
5068 | ||
5069 | /* Establish the type offset that can be used to lookup the type. | |
5070 | For DWO files, we don't know it until now. */ | |
5071 | sig_type->type_offset_in_section.sect_off = | |
5072 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
5073 | } | |
5074 | else | |
5075 | { | |
5076 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5077 | dwo_abbrev_section, | |
5078 | info_ptr, 0); | |
5079 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
5080 | /* For DWOs coming from DWP files, we don't know the CU length | |
5081 | until now. */ | |
5082 | dwo_unit->length = get_cu_length (&cu->header); | |
5083 | } | |
5084 | ||
02142a6c DE |
5085 | /* Replace the CU's original abbrev table with the DWO's. |
5086 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5087 | if (abbrev_table_provided) |
5088 | { | |
5089 | /* Don't free the provided abbrev table, the caller of | |
5090 | init_cutu_and_read_dies owns it. */ | |
5091 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5092 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5093 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5094 | } | |
5095 | else | |
5096 | { | |
5097 | dwarf2_free_abbrev_table (cu); | |
5098 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5099 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5100 | } |
5101 | ||
5102 | /* Read in the die, but leave space to copy over the attributes | |
5103 | from the stub. This has the benefit of simplifying the rest of | |
5104 | the code - all the work to maintain the illusion of a single | |
5105 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5106 | num_extra_attrs = ((stmt_list != NULL) | |
5107 | + (low_pc != NULL) | |
5108 | + (high_pc != NULL) | |
5109 | + (ranges != NULL) | |
5110 | + (comp_dir != NULL)); | |
5111 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5112 | result_has_children, num_extra_attrs); | |
5113 | ||
5114 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5115 | comp_unit_die = *result_comp_unit_die; | |
5116 | i = comp_unit_die->num_attrs; | |
5117 | if (stmt_list != NULL) | |
5118 | comp_unit_die->attrs[i++] = *stmt_list; | |
5119 | if (low_pc != NULL) | |
5120 | comp_unit_die->attrs[i++] = *low_pc; | |
5121 | if (high_pc != NULL) | |
5122 | comp_unit_die->attrs[i++] = *high_pc; | |
5123 | if (ranges != NULL) | |
5124 | comp_unit_die->attrs[i++] = *ranges; | |
5125 | if (comp_dir != NULL) | |
5126 | comp_unit_die->attrs[i++] = *comp_dir; | |
5127 | comp_unit_die->num_attrs += num_extra_attrs; | |
5128 | ||
bf6af496 DE |
5129 | if (dwarf2_die_debug) |
5130 | { | |
5131 | fprintf_unfiltered (gdb_stdlog, | |
5132 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5133 | get_section_name (section), |
bf6af496 DE |
5134 | (unsigned) (begin_info_ptr - section->buffer), |
5135 | bfd_get_filename (abfd)); | |
5136 | dump_die (comp_unit_die, dwarf2_die_debug); | |
5137 | } | |
5138 | ||
a2ce51a0 DE |
5139 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5140 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5141 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5142 | to get it via circuitous means. Blech. */ | |
5143 | if (comp_dir != NULL) | |
5144 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5145 | ||
b0c7bfa9 DE |
5146 | /* Skip dummy compilation units. */ |
5147 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5148 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5149 | return 0; | |
5150 | ||
5151 | *result_info_ptr = info_ptr; | |
5152 | return 1; | |
5153 | } | |
5154 | ||
5155 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5156 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5157 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5158 | |
5159 | static struct dwo_unit * | |
5160 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5161 | struct die_info *comp_unit_die) | |
5162 | { | |
5163 | struct dwarf2_cu *cu = this_cu->cu; | |
5164 | struct attribute *attr; | |
5165 | ULONGEST signature; | |
5166 | struct dwo_unit *dwo_unit; | |
5167 | const char *comp_dir, *dwo_name; | |
5168 | ||
a2ce51a0 DE |
5169 | gdb_assert (cu != NULL); |
5170 | ||
b0c7bfa9 DE |
5171 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
5172 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
5173 | gdb_assert (attr != NULL); | |
5174 | dwo_name = DW_STRING (attr); | |
5175 | comp_dir = NULL; | |
5176 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5177 | if (attr) | |
5178 | comp_dir = DW_STRING (attr); | |
5179 | ||
5180 | if (this_cu->is_debug_types) | |
5181 | { | |
5182 | struct signatured_type *sig_type; | |
5183 | ||
5184 | /* Since this_cu is the first member of struct signatured_type, | |
5185 | we can go from a pointer to one to a pointer to the other. */ | |
5186 | sig_type = (struct signatured_type *) this_cu; | |
5187 | signature = sig_type->signature; | |
5188 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5189 | } | |
5190 | else | |
5191 | { | |
5192 | struct attribute *attr; | |
5193 | ||
5194 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5195 | if (! attr) | |
5196 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5197 | " [in module %s]"), | |
4262abfb | 5198 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5199 | signature = DW_UNSND (attr); |
5200 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5201 | signature); | |
5202 | } | |
5203 | ||
b0c7bfa9 DE |
5204 | return dwo_unit; |
5205 | } | |
5206 | ||
a2ce51a0 DE |
5207 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5208 | Read a TU directly from a DWO file, bypassing the stub. */ | |
5209 | ||
5210 | static void | |
5211 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, int keep, | |
5212 | die_reader_func_ftype *die_reader_func, | |
5213 | void *data) | |
5214 | { | |
5215 | struct dwarf2_cu *cu; | |
5216 | struct signatured_type *sig_type; | |
5217 | struct cleanup *cleanups, *free_cu_cleanup; | |
5218 | struct die_reader_specs reader; | |
5219 | const gdb_byte *info_ptr; | |
5220 | struct die_info *comp_unit_die; | |
5221 | int has_children; | |
5222 | ||
5223 | /* Verify we can do the following downcast, and that we have the | |
5224 | data we need. */ | |
5225 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5226 | sig_type = (struct signatured_type *) this_cu; | |
5227 | gdb_assert (sig_type->dwo_unit != NULL); | |
5228 | ||
5229 | cleanups = make_cleanup (null_cleanup, NULL); | |
5230 | ||
5231 | gdb_assert (this_cu->cu == NULL); | |
5232 | cu = xmalloc (sizeof (*cu)); | |
5233 | init_one_comp_unit (cu, this_cu); | |
5234 | /* If an error occurs while loading, release our storage. */ | |
5235 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5236 | ||
5237 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5238 | 0 /* abbrev_table_provided */, | |
5239 | NULL /* stub_comp_unit_die */, | |
5240 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5241 | &reader, &info_ptr, | |
5242 | &comp_unit_die, &has_children) == 0) | |
5243 | { | |
5244 | /* Dummy die. */ | |
5245 | do_cleanups (cleanups); | |
5246 | return; | |
5247 | } | |
5248 | ||
5249 | /* All the "real" work is done here. */ | |
5250 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5251 | ||
5252 | /* This duplicates some code in init_cutu_and_read_dies, | |
5253 | but the alternative is making the latter more complex. | |
5254 | This function is only for the special case of using DWO files directly: | |
5255 | no point in overly complicating the general case just to handle this. */ | |
5256 | if (keep) | |
5257 | { | |
5258 | /* We've successfully allocated this compilation unit. Let our | |
5259 | caller clean it up when finished with it. */ | |
5260 | discard_cleanups (free_cu_cleanup); | |
5261 | ||
5262 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
5263 | So we have to manually free the abbrev table. */ | |
5264 | dwarf2_free_abbrev_table (cu); | |
5265 | ||
5266 | /* Link this CU into read_in_chain. */ | |
5267 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5268 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5269 | } | |
5270 | else | |
5271 | do_cleanups (free_cu_cleanup); | |
5272 | ||
5273 | do_cleanups (cleanups); | |
5274 | } | |
5275 | ||
fd820528 | 5276 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5277 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5278 | |
f4dc4d17 DE |
5279 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5280 | Otherwise the table specified in the comp unit header is read in and used. | |
5281 | This is an optimization for when we already have the abbrev table. | |
5282 | ||
dee91e82 DE |
5283 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5284 | Otherwise, a new CU is allocated with xmalloc. | |
5285 | ||
5286 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5287 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5288 | ||
5289 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5290 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5291 | |
70221824 | 5292 | static void |
fd820528 | 5293 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5294 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5295 | int use_existing_cu, int keep, |
5296 | die_reader_func_ftype *die_reader_func, | |
5297 | void *data) | |
c906108c | 5298 | { |
dee91e82 | 5299 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5300 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5301 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5302 | struct dwarf2_cu *cu; |
d521ce57 | 5303 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5304 | struct die_reader_specs reader; |
d85a05f0 | 5305 | struct die_info *comp_unit_die; |
dee91e82 | 5306 | int has_children; |
d85a05f0 | 5307 | struct attribute *attr; |
365156ad | 5308 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5309 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5310 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5311 | /* Non-zero if CU currently points to a DWO file and we need to |
5312 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5313 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5314 | int rereading_dwo_cu = 0; |
c906108c | 5315 | |
09406207 DE |
5316 | if (dwarf2_die_debug) |
5317 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5318 | this_cu->is_debug_types ? "type" : "comp", | |
5319 | this_cu->offset.sect_off); | |
5320 | ||
dee91e82 DE |
5321 | if (use_existing_cu) |
5322 | gdb_assert (keep); | |
23745b47 | 5323 | |
a2ce51a0 DE |
5324 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5325 | file (instead of going through the stub), short-circuit all of this. */ | |
5326 | if (this_cu->reading_dwo_directly) | |
5327 | { | |
5328 | /* Narrow down the scope of possibilities to have to understand. */ | |
5329 | gdb_assert (this_cu->is_debug_types); | |
5330 | gdb_assert (abbrev_table == NULL); | |
5331 | gdb_assert (!use_existing_cu); | |
5332 | init_tu_and_read_dwo_dies (this_cu, keep, die_reader_func, data); | |
5333 | return; | |
5334 | } | |
5335 | ||
dee91e82 DE |
5336 | cleanups = make_cleanup (null_cleanup, NULL); |
5337 | ||
5338 | /* This is cheap if the section is already read in. */ | |
5339 | dwarf2_read_section (objfile, section); | |
5340 | ||
5341 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5342 | |
5343 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5344 | |
5345 | if (use_existing_cu && this_cu->cu != NULL) | |
5346 | { | |
5347 | cu = this_cu->cu; | |
42e7ad6c DE |
5348 | |
5349 | /* If this CU is from a DWO file we need to start over, we need to | |
5350 | refetch the attributes from the skeleton CU. | |
5351 | This could be optimized by retrieving those attributes from when we | |
5352 | were here the first time: the previous comp_unit_die was stored in | |
5353 | comp_unit_obstack. But there's no data yet that we need this | |
5354 | optimization. */ | |
5355 | if (cu->dwo_unit != NULL) | |
5356 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5357 | } |
5358 | else | |
5359 | { | |
5360 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5361 | gdb_assert (this_cu->cu == NULL); | |
5362 | ||
5363 | cu = xmalloc (sizeof (*cu)); | |
5364 | init_one_comp_unit (cu, this_cu); | |
5365 | ||
5366 | /* If an error occurs while loading, release our storage. */ | |
365156ad | 5367 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5368 | } |
dee91e82 | 5369 | |
b0c7bfa9 | 5370 | /* Get the header. */ |
42e7ad6c DE |
5371 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5372 | { | |
5373 | /* We already have the header, there's no need to read it in again. */ | |
5374 | info_ptr += cu->header.first_die_offset.cu_off; | |
5375 | } | |
5376 | else | |
5377 | { | |
3019eac3 | 5378 | if (this_cu->is_debug_types) |
dee91e82 DE |
5379 | { |
5380 | ULONGEST signature; | |
42e7ad6c | 5381 | cu_offset type_offset_in_tu; |
dee91e82 | 5382 | |
4bdcc0c1 DE |
5383 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5384 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5385 | &signature, |
5386 | &type_offset_in_tu); | |
dee91e82 | 5387 | |
42e7ad6c DE |
5388 | /* Since per_cu is the first member of struct signatured_type, |
5389 | we can go from a pointer to one to a pointer to the other. */ | |
5390 | sig_type = (struct signatured_type *) this_cu; | |
5391 | gdb_assert (sig_type->signature == signature); | |
5392 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5393 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5394 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5395 | ||
42e7ad6c DE |
5396 | /* LENGTH has not been set yet for type units if we're |
5397 | using .gdb_index. */ | |
1ce1cefd | 5398 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5399 | |
5400 | /* Establish the type offset that can be used to lookup the type. */ | |
5401 | sig_type->type_offset_in_section.sect_off = | |
5402 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5403 | } |
5404 | else | |
5405 | { | |
4bdcc0c1 DE |
5406 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5407 | abbrev_section, | |
5408 | info_ptr, 0); | |
dee91e82 DE |
5409 | |
5410 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5411 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5412 | } |
5413 | } | |
10b3939b | 5414 | |
6caca83c | 5415 | /* Skip dummy compilation units. */ |
dee91e82 | 5416 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5417 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5418 | { | |
dee91e82 | 5419 | do_cleanups (cleanups); |
21b2bd31 | 5420 | return; |
6caca83c CC |
5421 | } |
5422 | ||
433df2d4 DE |
5423 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5424 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5425 | done. Note that it's important that if the CU had an abbrev table |
5426 | on entry we don't free it when we're done: Somewhere up the call stack | |
5427 | it may be in use. */ | |
f4dc4d17 DE |
5428 | if (abbrev_table != NULL) |
5429 | { | |
5430 | gdb_assert (cu->abbrev_table == NULL); | |
5431 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5432 | == abbrev_table->offset.sect_off); | |
5433 | cu->abbrev_table = abbrev_table; | |
5434 | } | |
5435 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5436 | { |
4bdcc0c1 | 5437 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5438 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5439 | } | |
42e7ad6c DE |
5440 | else if (rereading_dwo_cu) |
5441 | { | |
5442 | dwarf2_free_abbrev_table (cu); | |
5443 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5444 | } | |
af703f96 | 5445 | |
dee91e82 | 5446 | /* Read the top level CU/TU die. */ |
3019eac3 | 5447 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5448 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5449 | |
b0c7bfa9 DE |
5450 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5451 | from the DWO file. | |
5452 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5453 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5454 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5455 | if (attr) | |
5456 | { | |
3019eac3 | 5457 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5458 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5459 | |
5460 | if (has_children) | |
6a506a2d DE |
5461 | { |
5462 | complaint (&symfile_complaints, | |
5463 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5464 | " has children (offset 0x%x) [in module %s]"), | |
5465 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5466 | } | |
b0c7bfa9 | 5467 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5468 | if (dwo_unit != NULL) |
3019eac3 | 5469 | { |
6a506a2d DE |
5470 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5471 | abbrev_table != NULL, | |
a2ce51a0 | 5472 | comp_unit_die, NULL, |
6a506a2d DE |
5473 | &reader, &info_ptr, |
5474 | &dwo_comp_unit_die, &has_children) == 0) | |
5475 | { | |
5476 | /* Dummy die. */ | |
5477 | do_cleanups (cleanups); | |
5478 | return; | |
5479 | } | |
5480 | comp_unit_die = dwo_comp_unit_die; | |
5481 | } | |
5482 | else | |
5483 | { | |
5484 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5485 | the stub. A complaint has already been logged. There's | |
5486 | not much more we can do except pass on the stub DIE to | |
5487 | die_reader_func. We don't want to throw an error on bad | |
5488 | debug info. */ | |
3019eac3 DE |
5489 | } |
5490 | } | |
5491 | ||
b0c7bfa9 | 5492 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5493 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5494 | ||
b0c7bfa9 | 5495 | /* Done, clean up. */ |
365156ad | 5496 | if (free_cu_cleanup != NULL) |
348e048f | 5497 | { |
365156ad TT |
5498 | if (keep) |
5499 | { | |
5500 | /* We've successfully allocated this compilation unit. Let our | |
5501 | caller clean it up when finished with it. */ | |
5502 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5503 | |
365156ad TT |
5504 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5505 | So we have to manually free the abbrev table. */ | |
5506 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5507 | |
365156ad TT |
5508 | /* Link this CU into read_in_chain. */ |
5509 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5510 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5511 | } | |
5512 | else | |
5513 | do_cleanups (free_cu_cleanup); | |
348e048f | 5514 | } |
365156ad TT |
5515 | |
5516 | do_cleanups (cleanups); | |
dee91e82 DE |
5517 | } |
5518 | ||
33e80786 DE |
5519 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5520 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5521 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5522 | |
5523 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5524 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5525 | |
5526 | We fill in THIS_CU->length. | |
5527 | ||
5528 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5529 | linker) then DIE_READER_FUNC will not get called. | |
5530 | ||
5531 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5532 | This is done in order to not leave THIS_CU->cu in a state where we have |
5533 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5534 | |
5535 | static void | |
5536 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5537 | struct dwo_file *dwo_file, |
dee91e82 DE |
5538 | die_reader_func_ftype *die_reader_func, |
5539 | void *data) | |
5540 | { | |
5541 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5542 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5543 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5544 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5545 | struct dwarf2_cu cu; |
d521ce57 | 5546 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5547 | struct die_reader_specs reader; |
5548 | struct cleanup *cleanups; | |
5549 | struct die_info *comp_unit_die; | |
5550 | int has_children; | |
5551 | ||
09406207 DE |
5552 | if (dwarf2_die_debug) |
5553 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5554 | this_cu->is_debug_types ? "type" : "comp", | |
5555 | this_cu->offset.sect_off); | |
5556 | ||
dee91e82 DE |
5557 | gdb_assert (this_cu->cu == NULL); |
5558 | ||
33e80786 DE |
5559 | abbrev_section = (dwo_file != NULL |
5560 | ? &dwo_file->sections.abbrev | |
5561 | : get_abbrev_section_for_cu (this_cu)); | |
5562 | ||
dee91e82 DE |
5563 | /* This is cheap if the section is already read in. */ |
5564 | dwarf2_read_section (objfile, section); | |
5565 | ||
5566 | init_one_comp_unit (&cu, this_cu); | |
5567 | ||
5568 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5569 | ||
5570 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5571 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5572 | abbrev_section, info_ptr, | |
3019eac3 | 5573 | this_cu->is_debug_types); |
dee91e82 | 5574 | |
1ce1cefd | 5575 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5576 | |
5577 | /* Skip dummy compilation units. */ | |
5578 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5579 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5580 | { |
dee91e82 | 5581 | do_cleanups (cleanups); |
21b2bd31 | 5582 | return; |
93311388 | 5583 | } |
72bf9492 | 5584 | |
dee91e82 DE |
5585 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5586 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5587 | ||
3019eac3 | 5588 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5589 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5590 | ||
5591 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5592 | ||
5593 | do_cleanups (cleanups); | |
5594 | } | |
5595 | ||
3019eac3 DE |
5596 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5597 | does not lookup the specified DWO file. | |
5598 | This cannot be used to read DWO files. | |
dee91e82 DE |
5599 | |
5600 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5601 | This is done in order to not leave THIS_CU->cu in a state where we have |
5602 | to care whether it refers to the "main" CU or the DWO CU. | |
5603 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5604 | |
5605 | static void | |
5606 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5607 | die_reader_func_ftype *die_reader_func, | |
5608 | void *data) | |
5609 | { | |
33e80786 | 5610 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5611 | } |
0018ea6f DE |
5612 | \f |
5613 | /* Type Unit Groups. | |
dee91e82 | 5614 | |
0018ea6f DE |
5615 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5616 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5617 | so that all types coming from the same compilation (.o file) are grouped | |
5618 | together. A future step could be to put the types in the same symtab as | |
5619 | the CU the types ultimately came from. */ | |
ff013f42 | 5620 | |
f4dc4d17 DE |
5621 | static hashval_t |
5622 | hash_type_unit_group (const void *item) | |
5623 | { | |
094b34ac | 5624 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 5625 | |
094b34ac | 5626 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5627 | } |
348e048f DE |
5628 | |
5629 | static int | |
f4dc4d17 | 5630 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5631 | { |
f4dc4d17 DE |
5632 | const struct type_unit_group *lhs = item_lhs; |
5633 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 5634 | |
094b34ac | 5635 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5636 | } |
348e048f | 5637 | |
f4dc4d17 DE |
5638 | /* Allocate a hash table for type unit groups. */ |
5639 | ||
5640 | static htab_t | |
5641 | allocate_type_unit_groups_table (void) | |
5642 | { | |
5643 | return htab_create_alloc_ex (3, | |
5644 | hash_type_unit_group, | |
5645 | eq_type_unit_group, | |
5646 | NULL, | |
5647 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5648 | hashtab_obstack_allocate, | |
5649 | dummy_obstack_deallocate); | |
5650 | } | |
dee91e82 | 5651 | |
f4dc4d17 DE |
5652 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5653 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5654 | of any one psymtab grow too big. */ | |
5655 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5656 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5657 | |
094b34ac | 5658 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5659 | Create the type_unit_group object used to hold one or more TUs. */ |
5660 | ||
5661 | static struct type_unit_group * | |
094b34ac | 5662 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5663 | { |
5664 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5665 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5666 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5667 | |
5668 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5669 | struct type_unit_group); | |
094b34ac | 5670 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5671 | per_cu->objfile = objfile; |
f4dc4d17 | 5672 | |
094b34ac DE |
5673 | if (dwarf2_per_objfile->using_index) |
5674 | { | |
5675 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5676 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5677 | } |
5678 | else | |
5679 | { | |
5680 | unsigned int line_offset = line_offset_struct.sect_off; | |
5681 | struct partial_symtab *pst; | |
5682 | char *name; | |
5683 | ||
5684 | /* Give the symtab a useful name for debug purposes. */ | |
5685 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5686 | name = xstrprintf ("<type_units_%d>", | |
5687 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5688 | else | |
5689 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5690 | ||
5691 | pst = create_partial_symtab (per_cu, name); | |
5692 | pst->anonymous = 1; | |
f4dc4d17 | 5693 | |
094b34ac DE |
5694 | xfree (name); |
5695 | } | |
f4dc4d17 | 5696 | |
094b34ac DE |
5697 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5698 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5699 | |
5700 | return tu_group; | |
5701 | } | |
5702 | ||
094b34ac DE |
5703 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5704 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5705 | |
5706 | static struct type_unit_group * | |
ff39bb5e | 5707 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5708 | { |
5709 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5710 | struct type_unit_group *tu_group; | |
5711 | void **slot; | |
5712 | unsigned int line_offset; | |
5713 | struct type_unit_group type_unit_group_for_lookup; | |
5714 | ||
5715 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5716 | { | |
5717 | dwarf2_per_objfile->type_unit_groups = | |
5718 | allocate_type_unit_groups_table (); | |
5719 | } | |
5720 | ||
5721 | /* Do we need to create a new group, or can we use an existing one? */ | |
5722 | ||
5723 | if (stmt_list) | |
5724 | { | |
5725 | line_offset = DW_UNSND (stmt_list); | |
5726 | ++tu_stats->nr_symtab_sharers; | |
5727 | } | |
5728 | else | |
5729 | { | |
5730 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5731 | We can do various things here like create one group per TU or | |
5732 | spread them over multiple groups to split up the expansion work. | |
5733 | To avoid worst case scenarios (too many groups or too large groups) | |
5734 | we, umm, group them in bunches. */ | |
5735 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5736 | | (tu_stats->nr_stmt_less_type_units | |
5737 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5738 | ++tu_stats->nr_stmt_less_type_units; | |
5739 | } | |
5740 | ||
094b34ac DE |
5741 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5742 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5743 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5744 | &type_unit_group_for_lookup, INSERT); | |
5745 | if (*slot != NULL) | |
5746 | { | |
5747 | tu_group = *slot; | |
5748 | gdb_assert (tu_group != NULL); | |
5749 | } | |
5750 | else | |
5751 | { | |
5752 | sect_offset line_offset_struct; | |
5753 | ||
5754 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5755 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5756 | *slot = tu_group; |
5757 | ++tu_stats->nr_symtabs; | |
5758 | } | |
5759 | ||
5760 | return tu_group; | |
5761 | } | |
5762 | ||
5763 | /* Struct used to sort TUs by their abbreviation table offset. */ | |
5764 | ||
5765 | struct tu_abbrev_offset | |
5766 | { | |
5767 | struct signatured_type *sig_type; | |
5768 | sect_offset abbrev_offset; | |
5769 | }; | |
5770 | ||
5771 | /* Helper routine for build_type_unit_groups, passed to qsort. */ | |
5772 | ||
5773 | static int | |
5774 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
5775 | { | |
5776 | const struct tu_abbrev_offset * const *a = ap; | |
5777 | const struct tu_abbrev_offset * const *b = bp; | |
5778 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
5779 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
5780 | ||
5781 | return (aoff > boff) - (aoff < boff); | |
5782 | } | |
5783 | ||
5784 | /* A helper function to add a type_unit_group to a table. */ | |
5785 | ||
5786 | static int | |
5787 | add_type_unit_group_to_table (void **slot, void *datum) | |
5788 | { | |
5789 | struct type_unit_group *tu_group = *slot; | |
5790 | struct type_unit_group ***datap = datum; | |
5791 | ||
5792 | **datap = tu_group; | |
5793 | ++*datap; | |
5794 | ||
5795 | return 1; | |
5796 | } | |
5797 | ||
5798 | /* Efficiently read all the type units, calling init_cutu_and_read_dies on | |
5799 | each one passing FUNC,DATA. | |
5800 | ||
5801 | The efficiency is because we sort TUs by the abbrev table they use and | |
5802 | only read each abbrev table once. In one program there are 200K TUs | |
5803 | sharing 8K abbrev tables. | |
5804 | ||
5805 | The main purpose of this function is to support building the | |
5806 | dwarf2_per_objfile->type_unit_groups table. | |
5807 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
5808 | can collapse the search space by grouping them by stmt_list. | |
5809 | The savings can be significant, in the same program from above the 200K TUs | |
5810 | share 8K stmt_list tables. | |
5811 | ||
5812 | FUNC is expected to call get_type_unit_group, which will create the | |
5813 | struct type_unit_group if necessary and add it to | |
5814 | dwarf2_per_objfile->type_unit_groups. */ | |
5815 | ||
5816 | static void | |
5817 | build_type_unit_groups (die_reader_func_ftype *func, void *data) | |
5818 | { | |
5819 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5820 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5821 | struct cleanup *cleanups; | |
5822 | struct abbrev_table *abbrev_table; | |
5823 | sect_offset abbrev_offset; | |
5824 | struct tu_abbrev_offset *sorted_by_abbrev; | |
5825 | struct type_unit_group **iter; | |
5826 | int i; | |
5827 | ||
5828 | /* It's up to the caller to not call us multiple times. */ | |
5829 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
5830 | ||
5831 | if (dwarf2_per_objfile->n_type_units == 0) | |
5832 | return; | |
5833 | ||
5834 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
5835 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
5836 | read each abbrev table in. | |
5837 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
5838 | This is simpler and efficient enough for now. | |
5839 | ||
5840 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
5841 | symtab to use). Typically TUs with the same abbrev offset have the same | |
5842 | stmt_list value too so in practice this should work well. | |
5843 | ||
5844 | The basic algorithm here is: | |
5845 | ||
5846 | sort TUs by abbrev table | |
5847 | for each TU with same abbrev table: | |
5848 | read abbrev table if first user | |
5849 | read TU top level DIE | |
5850 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
5851 | call FUNC */ | |
5852 | ||
5853 | if (dwarf2_read_debug) | |
5854 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
5855 | ||
5856 | /* Sort in a separate table to maintain the order of all_type_units | |
5857 | for .gdb_index: TU indices directly index all_type_units. */ | |
5858 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
5859 | dwarf2_per_objfile->n_type_units); | |
5860 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5861 | { | |
5862 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
5863 | ||
5864 | sorted_by_abbrev[i].sig_type = sig_type; | |
5865 | sorted_by_abbrev[i].abbrev_offset = | |
8a0459fd | 5866 | read_abbrev_offset (sig_type->per_cu.section, |
f4dc4d17 DE |
5867 | sig_type->per_cu.offset); |
5868 | } | |
5869 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
5870 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
5871 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
5872 | ||
094b34ac DE |
5873 | /* Note: In the .gdb_index case, get_type_unit_group may have already been |
5874 | called any number of times, so we don't reset tu_stats here. */ | |
5875 | ||
f4dc4d17 DE |
5876 | abbrev_offset.sect_off = ~(unsigned) 0; |
5877 | abbrev_table = NULL; | |
5878 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
5879 | ||
5880 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5881 | { | |
5882 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
5883 | ||
5884 | /* Switch to the next abbrev table if necessary. */ | |
5885 | if (abbrev_table == NULL | |
5886 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
5887 | { | |
5888 | if (abbrev_table != NULL) | |
5889 | { | |
5890 | abbrev_table_free (abbrev_table); | |
5891 | /* Reset to NULL in case abbrev_table_read_table throws | |
5892 | an error: abbrev_table_free_cleanup will get called. */ | |
5893 | abbrev_table = NULL; | |
5894 | } | |
5895 | abbrev_offset = tu->abbrev_offset; | |
5896 | abbrev_table = | |
5897 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
5898 | abbrev_offset); | |
5899 | ++tu_stats->nr_uniq_abbrev_tables; | |
5900 | } | |
5901 | ||
5902 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
5903 | func, data); | |
5904 | } | |
5905 | ||
a2ce51a0 DE |
5906 | /* type_unit_groups can be NULL if there is an error in the debug info. |
5907 | Just create an empty table so the rest of gdb doesn't have to watch | |
5908 | for this error case. */ | |
5909 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5910 | { | |
5911 | dwarf2_per_objfile->type_unit_groups = | |
5912 | allocate_type_unit_groups_table (); | |
5913 | dwarf2_per_objfile->n_type_unit_groups = 0; | |
5914 | } | |
5915 | ||
f4dc4d17 DE |
5916 | /* Create a vector of pointers to primary type units to make it easy to |
5917 | iterate over them and CUs. See dw2_get_primary_cu. */ | |
5918 | dwarf2_per_objfile->n_type_unit_groups = | |
5919 | htab_elements (dwarf2_per_objfile->type_unit_groups); | |
5920 | dwarf2_per_objfile->all_type_unit_groups = | |
5921 | obstack_alloc (&objfile->objfile_obstack, | |
5922 | dwarf2_per_objfile->n_type_unit_groups | |
5923 | * sizeof (struct type_unit_group *)); | |
5924 | iter = &dwarf2_per_objfile->all_type_unit_groups[0]; | |
5925 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5926 | add_type_unit_group_to_table, &iter); | |
5927 | gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0] | |
5928 | == dwarf2_per_objfile->n_type_unit_groups); | |
5929 | ||
5930 | do_cleanups (cleanups); | |
5931 | ||
5932 | if (dwarf2_read_debug) | |
5933 | { | |
5934 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
5935 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
5936 | dwarf2_per_objfile->n_type_units); | |
5937 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
5938 | tu_stats->nr_uniq_abbrev_tables); | |
5939 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
5940 | tu_stats->nr_symtabs); | |
5941 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
5942 | tu_stats->nr_symtab_sharers); | |
5943 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
5944 | tu_stats->nr_stmt_less_type_units); | |
5945 | } | |
5946 | } | |
0018ea6f DE |
5947 | \f |
5948 | /* Partial symbol tables. */ | |
5949 | ||
5950 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5951 | ||
5952 | The caller must fill in the following details: | |
5953 | dirname, textlow, texthigh. */ | |
5954 | ||
5955 | static struct partial_symtab * | |
5956 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5957 | { | |
5958 | struct objfile *objfile = per_cu->objfile; | |
5959 | struct partial_symtab *pst; | |
5960 | ||
5961 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
5962 | name, 0, | |
5963 | objfile->global_psymbols.next, | |
5964 | objfile->static_psymbols.next); | |
5965 | ||
5966 | pst->psymtabs_addrmap_supported = 1; | |
5967 | ||
5968 | /* This is the glue that links PST into GDB's symbol API. */ | |
5969 | pst->read_symtab_private = per_cu; | |
5970 | pst->read_symtab = dwarf2_read_symtab; | |
5971 | per_cu->v.psymtab = pst; | |
5972 | ||
5973 | return pst; | |
5974 | } | |
5975 | ||
b93601f3 TT |
5976 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5977 | type. */ | |
5978 | ||
5979 | struct process_psymtab_comp_unit_data | |
5980 | { | |
5981 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5982 | ||
5983 | int want_partial_unit; | |
5984 | ||
5985 | /* The "pretend" language that is used if the CU doesn't declare a | |
5986 | language. */ | |
5987 | ||
5988 | enum language pretend_language; | |
5989 | }; | |
5990 | ||
0018ea6f DE |
5991 | /* die_reader_func for process_psymtab_comp_unit. */ |
5992 | ||
5993 | static void | |
5994 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5995 | const gdb_byte *info_ptr, |
0018ea6f DE |
5996 | struct die_info *comp_unit_die, |
5997 | int has_children, | |
5998 | void *data) | |
5999 | { | |
6000 | struct dwarf2_cu *cu = reader->cu; | |
6001 | struct objfile *objfile = cu->objfile; | |
6002 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
6003 | struct attribute *attr; | |
6004 | CORE_ADDR baseaddr; | |
6005 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
6006 | struct partial_symtab *pst; | |
6007 | int has_pc_info; | |
6008 | const char *filename; | |
b93601f3 | 6009 | struct process_psymtab_comp_unit_data *info = data; |
0018ea6f | 6010 | |
b93601f3 | 6011 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
6012 | return; |
6013 | ||
6014 | gdb_assert (! per_cu->is_debug_types); | |
6015 | ||
b93601f3 | 6016 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
6017 | |
6018 | cu->list_in_scope = &file_symbols; | |
6019 | ||
6020 | /* Allocate a new partial symbol table structure. */ | |
6021 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
6022 | if (attr == NULL || !DW_STRING (attr)) | |
6023 | filename = ""; | |
6024 | else | |
6025 | filename = DW_STRING (attr); | |
6026 | ||
6027 | pst = create_partial_symtab (per_cu, filename); | |
6028 | ||
6029 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
6030 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
6031 | if (attr != NULL) | |
6032 | pst->dirname = DW_STRING (attr); | |
6033 | ||
6034 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6035 | ||
6036 | dwarf2_find_base_address (comp_unit_die, cu); | |
6037 | ||
6038 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6039 | `DW_AT_ranges'. */ | |
6040 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
6041 | &best_highpc, cu, pst); | |
6042 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
6043 | /* Store the contiguous range if it is not empty; it can be empty for | |
6044 | CUs with no code. */ | |
6045 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
6046 | best_lowpc + baseaddr, | |
6047 | best_highpc + baseaddr - 1, pst); | |
6048 | ||
6049 | /* Check if comp unit has_children. | |
6050 | If so, read the rest of the partial symbols from this comp unit. | |
6051 | If not, there's no more debug_info for this comp unit. */ | |
6052 | if (has_children) | |
6053 | { | |
6054 | struct partial_die_info *first_die; | |
6055 | CORE_ADDR lowpc, highpc; | |
6056 | ||
6057 | lowpc = ((CORE_ADDR) -1); | |
6058 | highpc = ((CORE_ADDR) 0); | |
6059 | ||
6060 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6061 | ||
6062 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
6063 | ! has_pc_info, cu); | |
6064 | ||
6065 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6066 | complaints from `maint check'. */ | |
6067 | if (lowpc == ((CORE_ADDR) -1)) | |
6068 | lowpc = highpc; | |
6069 | ||
6070 | /* If the compilation unit didn't have an explicit address range, | |
6071 | then use the information extracted from its child dies. */ | |
6072 | if (! has_pc_info) | |
6073 | { | |
6074 | best_lowpc = lowpc; | |
6075 | best_highpc = highpc; | |
6076 | } | |
6077 | } | |
6078 | pst->textlow = best_lowpc + baseaddr; | |
6079 | pst->texthigh = best_highpc + baseaddr; | |
6080 | ||
6081 | pst->n_global_syms = objfile->global_psymbols.next - | |
6082 | (objfile->global_psymbols.list + pst->globals_offset); | |
6083 | pst->n_static_syms = objfile->static_psymbols.next - | |
6084 | (objfile->static_psymbols.list + pst->statics_offset); | |
6085 | sort_pst_symbols (objfile, pst); | |
6086 | ||
6087 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6088 | { | |
6089 | int i; | |
6090 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6091 | struct dwarf2_per_cu_data *iter; | |
6092 | ||
6093 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6094 | post-pass. */ | |
6095 | pst->number_of_dependencies = len; | |
6096 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
6097 | len * sizeof (struct symtab *)); | |
6098 | for (i = 0; | |
6099 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6100 | i, iter); | |
6101 | ++i) | |
6102 | pst->dependencies[i] = iter->v.psymtab; | |
6103 | ||
6104 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6105 | } | |
6106 | ||
6107 | /* Get the list of files included in the current compilation unit, | |
6108 | and build a psymtab for each of them. */ | |
6109 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6110 | ||
6111 | if (dwarf2_read_debug) | |
6112 | { | |
6113 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6114 | ||
6115 | fprintf_unfiltered (gdb_stdlog, | |
6116 | "Psymtab for %s unit @0x%x: %s - %s" | |
6117 | ", %d global, %d static syms\n", | |
6118 | per_cu->is_debug_types ? "type" : "comp", | |
6119 | per_cu->offset.sect_off, | |
6120 | paddress (gdbarch, pst->textlow), | |
6121 | paddress (gdbarch, pst->texthigh), | |
6122 | pst->n_global_syms, pst->n_static_syms); | |
6123 | } | |
6124 | } | |
6125 | ||
6126 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6127 | Process compilation unit THIS_CU for a psymtab. */ | |
6128 | ||
6129 | static void | |
6130 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6131 | int want_partial_unit, |
6132 | enum language pretend_language) | |
0018ea6f | 6133 | { |
b93601f3 TT |
6134 | struct process_psymtab_comp_unit_data info; |
6135 | ||
0018ea6f DE |
6136 | /* If this compilation unit was already read in, free the |
6137 | cached copy in order to read it in again. This is | |
6138 | necessary because we skipped some symbols when we first | |
6139 | read in the compilation unit (see load_partial_dies). | |
6140 | This problem could be avoided, but the benefit is unclear. */ | |
6141 | if (this_cu->cu != NULL) | |
6142 | free_one_cached_comp_unit (this_cu); | |
6143 | ||
6144 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
6145 | info.want_partial_unit = want_partial_unit; |
6146 | info.pretend_language = pretend_language; | |
0018ea6f DE |
6147 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
6148 | process_psymtab_comp_unit_reader, | |
b93601f3 | 6149 | &info); |
0018ea6f DE |
6150 | |
6151 | /* Age out any secondary CUs. */ | |
6152 | age_cached_comp_units (); | |
6153 | } | |
f4dc4d17 DE |
6154 | |
6155 | /* Reader function for build_type_psymtabs. */ | |
6156 | ||
6157 | static void | |
6158 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6159 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6160 | struct die_info *type_unit_die, |
6161 | int has_children, | |
6162 | void *data) | |
6163 | { | |
6164 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6165 | struct dwarf2_cu *cu = reader->cu; | |
6166 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6167 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6168 | struct type_unit_group *tu_group; |
6169 | struct attribute *attr; | |
6170 | struct partial_die_info *first_die; | |
6171 | CORE_ADDR lowpc, highpc; | |
6172 | struct partial_symtab *pst; | |
6173 | ||
6174 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6175 | gdb_assert (per_cu->is_debug_types); |
6176 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6177 | |
6178 | if (! has_children) | |
6179 | return; | |
6180 | ||
6181 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6182 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6183 | |
0186c6a7 | 6184 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6185 | |
6186 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6187 | cu->list_in_scope = &file_symbols; | |
6188 | pst = create_partial_symtab (per_cu, ""); | |
6189 | pst->anonymous = 1; | |
6190 | ||
6191 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6192 | ||
6193 | lowpc = (CORE_ADDR) -1; | |
6194 | highpc = (CORE_ADDR) 0; | |
6195 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6196 | ||
6197 | pst->n_global_syms = objfile->global_psymbols.next - | |
6198 | (objfile->global_psymbols.list + pst->globals_offset); | |
6199 | pst->n_static_syms = objfile->static_psymbols.next - | |
6200 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 6201 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
6202 | } |
6203 | ||
6204 | /* Traversal function for build_type_psymtabs. */ | |
6205 | ||
6206 | static int | |
6207 | build_type_psymtab_dependencies (void **slot, void *info) | |
6208 | { | |
6209 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6210 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6211 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6212 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6213 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6214 | struct signatured_type *iter; | |
f4dc4d17 DE |
6215 | int i; |
6216 | ||
6217 | gdb_assert (len > 0); | |
0186c6a7 | 6218 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6219 | |
6220 | pst->number_of_dependencies = len; | |
6221 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
6222 | len * sizeof (struct psymtab *)); | |
6223 | for (i = 0; | |
0186c6a7 | 6224 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6225 | ++i) |
6226 | { | |
0186c6a7 DE |
6227 | gdb_assert (iter->per_cu.is_debug_types); |
6228 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6229 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6230 | } |
6231 | ||
0186c6a7 | 6232 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6233 | |
6234 | return 1; | |
6235 | } | |
6236 | ||
6237 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6238 | Build partial symbol tables for the .debug_types comp-units. */ | |
6239 | ||
6240 | static void | |
6241 | build_type_psymtabs (struct objfile *objfile) | |
6242 | { | |
0e50663e | 6243 | if (! create_all_type_units (objfile)) |
348e048f DE |
6244 | return; |
6245 | ||
f4dc4d17 DE |
6246 | build_type_unit_groups (build_type_psymtabs_reader, NULL); |
6247 | ||
6248 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6249 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6250 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
6251 | } |
6252 | ||
60606b2c TT |
6253 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6254 | ||
6255 | static void | |
6256 | psymtabs_addrmap_cleanup (void *o) | |
6257 | { | |
6258 | struct objfile *objfile = o; | |
ec61707d | 6259 | |
60606b2c TT |
6260 | objfile->psymtabs_addrmap = NULL; |
6261 | } | |
6262 | ||
95554aad TT |
6263 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6264 | ||
6265 | static void | |
6266 | set_partial_user (struct objfile *objfile) | |
6267 | { | |
6268 | int i; | |
6269 | ||
6270 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6271 | { | |
6272 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
6273 | struct partial_symtab *pst = per_cu->v.psymtab; | |
6274 | int j; | |
6275 | ||
36586728 TT |
6276 | if (pst == NULL) |
6277 | continue; | |
6278 | ||
95554aad TT |
6279 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6280 | { | |
6281 | /* Set the 'user' field only if it is not already set. */ | |
6282 | if (pst->dependencies[j]->user == NULL) | |
6283 | pst->dependencies[j]->user = pst; | |
6284 | } | |
6285 | } | |
6286 | } | |
6287 | ||
93311388 DE |
6288 | /* Build the partial symbol table by doing a quick pass through the |
6289 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6290 | |
93311388 | 6291 | static void |
c67a9c90 | 6292 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6293 | { |
60606b2c TT |
6294 | struct cleanup *back_to, *addrmap_cleanup; |
6295 | struct obstack temp_obstack; | |
21b2bd31 | 6296 | int i; |
93311388 | 6297 | |
45cfd468 DE |
6298 | if (dwarf2_read_debug) |
6299 | { | |
6300 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6301 | objfile_name (objfile)); |
45cfd468 DE |
6302 | } |
6303 | ||
98bfdba5 PA |
6304 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6305 | ||
be391dca | 6306 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6307 | |
93311388 DE |
6308 | /* Any cached compilation units will be linked by the per-objfile |
6309 | read_in_chain. Make sure to free them when we're done. */ | |
6310 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6311 | |
348e048f DE |
6312 | build_type_psymtabs (objfile); |
6313 | ||
93311388 | 6314 | create_all_comp_units (objfile); |
c906108c | 6315 | |
60606b2c TT |
6316 | /* Create a temporary address map on a temporary obstack. We later |
6317 | copy this to the final obstack. */ | |
6318 | obstack_init (&temp_obstack); | |
6319 | make_cleanup_obstack_free (&temp_obstack); | |
6320 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6321 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6322 | |
21b2bd31 | 6323 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6324 | { |
21b2bd31 | 6325 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
aaa75496 | 6326 | |
b93601f3 | 6327 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6328 | } |
ff013f42 | 6329 | |
95554aad TT |
6330 | set_partial_user (objfile); |
6331 | ||
ff013f42 JK |
6332 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6333 | &objfile->objfile_obstack); | |
60606b2c | 6334 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6335 | |
ae038cb0 | 6336 | do_cleanups (back_to); |
45cfd468 DE |
6337 | |
6338 | if (dwarf2_read_debug) | |
6339 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
4262abfb | 6340 | objfile_name (objfile)); |
ae038cb0 DJ |
6341 | } |
6342 | ||
3019eac3 | 6343 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6344 | |
6345 | static void | |
dee91e82 | 6346 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6347 | const gdb_byte *info_ptr, |
dee91e82 DE |
6348 | struct die_info *comp_unit_die, |
6349 | int has_children, | |
6350 | void *data) | |
ae038cb0 | 6351 | { |
dee91e82 | 6352 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6353 | |
95554aad | 6354 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6355 | |
ae038cb0 DJ |
6356 | /* Check if comp unit has_children. |
6357 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6358 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6359 | if (has_children) |
dee91e82 DE |
6360 | load_partial_dies (reader, info_ptr, 0); |
6361 | } | |
98bfdba5 | 6362 | |
dee91e82 DE |
6363 | /* Load the partial DIEs for a secondary CU into memory. |
6364 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6365 | |
dee91e82 DE |
6366 | static void |
6367 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6368 | { | |
f4dc4d17 DE |
6369 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6370 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6371 | } |
6372 | ||
ae038cb0 | 6373 | static void |
36586728 TT |
6374 | read_comp_units_from_section (struct objfile *objfile, |
6375 | struct dwarf2_section_info *section, | |
6376 | unsigned int is_dwz, | |
6377 | int *n_allocated, | |
6378 | int *n_comp_units, | |
6379 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6380 | { |
d521ce57 | 6381 | const gdb_byte *info_ptr; |
a32a8923 | 6382 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6383 | |
bf6af496 DE |
6384 | if (dwarf2_read_debug) |
6385 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", | |
a32a8923 DE |
6386 | get_section_name (section), |
6387 | get_section_file_name (section)); | |
bf6af496 | 6388 | |
36586728 | 6389 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6390 | |
36586728 | 6391 | info_ptr = section->buffer; |
6e70227d | 6392 | |
36586728 | 6393 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6394 | { |
c764a876 | 6395 | unsigned int length, initial_length_size; |
ae038cb0 | 6396 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6397 | sect_offset offset; |
ae038cb0 | 6398 | |
36586728 | 6399 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6400 | |
6401 | /* Read just enough information to find out where the next | |
6402 | compilation unit is. */ | |
36586728 | 6403 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6404 | |
6405 | /* Save the compilation unit for later lookup. */ | |
6406 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
6407 | sizeof (struct dwarf2_per_cu_data)); | |
6408 | memset (this_cu, 0, sizeof (*this_cu)); | |
6409 | this_cu->offset = offset; | |
c764a876 | 6410 | this_cu->length = length + initial_length_size; |
36586728 | 6411 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6412 | this_cu->objfile = objfile; |
8a0459fd | 6413 | this_cu->section = section; |
ae038cb0 | 6414 | |
36586728 | 6415 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6416 | { |
36586728 TT |
6417 | *n_allocated *= 2; |
6418 | *all_comp_units = xrealloc (*all_comp_units, | |
6419 | *n_allocated | |
6420 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 6421 | } |
36586728 TT |
6422 | (*all_comp_units)[*n_comp_units] = this_cu; |
6423 | ++*n_comp_units; | |
ae038cb0 DJ |
6424 | |
6425 | info_ptr = info_ptr + this_cu->length; | |
6426 | } | |
36586728 TT |
6427 | } |
6428 | ||
6429 | /* Create a list of all compilation units in OBJFILE. | |
6430 | This is only done for -readnow and building partial symtabs. */ | |
6431 | ||
6432 | static void | |
6433 | create_all_comp_units (struct objfile *objfile) | |
6434 | { | |
6435 | int n_allocated; | |
6436 | int n_comp_units; | |
6437 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6438 | struct dwz_file *dwz; |
36586728 TT |
6439 | |
6440 | n_comp_units = 0; | |
6441 | n_allocated = 10; | |
6442 | all_comp_units = xmalloc (n_allocated | |
6443 | * sizeof (struct dwarf2_per_cu_data *)); | |
6444 | ||
6445 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6446 | &n_allocated, &n_comp_units, &all_comp_units); | |
6447 | ||
4db1a1dc TT |
6448 | dwz = dwarf2_get_dwz_file (); |
6449 | if (dwz != NULL) | |
6450 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6451 | &n_allocated, &n_comp_units, | |
6452 | &all_comp_units); | |
ae038cb0 DJ |
6453 | |
6454 | dwarf2_per_objfile->all_comp_units | |
6455 | = obstack_alloc (&objfile->objfile_obstack, | |
6456 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6457 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
6458 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6459 | xfree (all_comp_units); | |
6460 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6461 | } |
6462 | ||
5734ee8b DJ |
6463 | /* Process all loaded DIEs for compilation unit CU, starting at |
6464 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
6465 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
6466 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
6467 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
6468 | and record the covered ranges in the addrmap. */ | |
c906108c | 6469 | |
72bf9492 DJ |
6470 | static void |
6471 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 6472 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 6473 | { |
72bf9492 | 6474 | struct partial_die_info *pdi; |
c906108c | 6475 | |
91c24f0a DC |
6476 | /* Now, march along the PDI's, descending into ones which have |
6477 | interesting children but skipping the children of the other ones, | |
6478 | until we reach the end of the compilation unit. */ | |
c906108c | 6479 | |
72bf9492 | 6480 | pdi = first_die; |
91c24f0a | 6481 | |
72bf9492 DJ |
6482 | while (pdi != NULL) |
6483 | { | |
6484 | fixup_partial_die (pdi, cu); | |
c906108c | 6485 | |
f55ee35c | 6486 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6487 | children, so we need to look at them. Ditto for anonymous |
6488 | enums. */ | |
933c6fe4 | 6489 | |
72bf9492 | 6490 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6491 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6492 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6493 | { |
72bf9492 | 6494 | switch (pdi->tag) |
c906108c SS |
6495 | { |
6496 | case DW_TAG_subprogram: | |
5734ee8b | 6497 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 6498 | break; |
72929c62 | 6499 | case DW_TAG_constant: |
c906108c SS |
6500 | case DW_TAG_variable: |
6501 | case DW_TAG_typedef: | |
91c24f0a | 6502 | case DW_TAG_union_type: |
72bf9492 | 6503 | if (!pdi->is_declaration) |
63d06c5c | 6504 | { |
72bf9492 | 6505 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6506 | } |
6507 | break; | |
c906108c | 6508 | case DW_TAG_class_type: |
680b30c7 | 6509 | case DW_TAG_interface_type: |
c906108c | 6510 | case DW_TAG_structure_type: |
72bf9492 | 6511 | if (!pdi->is_declaration) |
c906108c | 6512 | { |
72bf9492 | 6513 | add_partial_symbol (pdi, cu); |
c906108c SS |
6514 | } |
6515 | break; | |
91c24f0a | 6516 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6517 | if (!pdi->is_declaration) |
6518 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6519 | break; |
6520 | case DW_TAG_base_type: | |
a02abb62 | 6521 | case DW_TAG_subrange_type: |
c906108c | 6522 | /* File scope base type definitions are added to the partial |
c5aa993b | 6523 | symbol table. */ |
72bf9492 | 6524 | add_partial_symbol (pdi, cu); |
c906108c | 6525 | break; |
d9fa45fe | 6526 | case DW_TAG_namespace: |
5734ee8b | 6527 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 6528 | break; |
5d7cb8df JK |
6529 | case DW_TAG_module: |
6530 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
6531 | break; | |
95554aad TT |
6532 | case DW_TAG_imported_unit: |
6533 | { | |
6534 | struct dwarf2_per_cu_data *per_cu; | |
6535 | ||
f4dc4d17 DE |
6536 | /* For now we don't handle imported units in type units. */ |
6537 | if (cu->per_cu->is_debug_types) | |
6538 | { | |
6539 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6540 | " supported in type units [in module %s]"), | |
4262abfb | 6541 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6542 | } |
6543 | ||
95554aad | 6544 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6545 | pdi->is_dwz, |
95554aad TT |
6546 | cu->objfile); |
6547 | ||
6548 | /* Go read the partial unit, if needed. */ | |
6549 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6550 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6551 | |
f4dc4d17 | 6552 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6553 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6554 | } |
6555 | break; | |
74921315 KS |
6556 | case DW_TAG_imported_declaration: |
6557 | add_partial_symbol (pdi, cu); | |
6558 | break; | |
c906108c SS |
6559 | default: |
6560 | break; | |
6561 | } | |
6562 | } | |
6563 | ||
72bf9492 DJ |
6564 | /* If the die has a sibling, skip to the sibling. */ |
6565 | ||
6566 | pdi = pdi->die_sibling; | |
6567 | } | |
6568 | } | |
6569 | ||
6570 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6571 | |
72bf9492 | 6572 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
6573 | name is concatenated with "::" and the partial DIE's name. For |
6574 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
6575 | Enumerators are an exception; they use the scope of their parent |
6576 | enumeration type, i.e. the name of the enumeration type is not | |
6577 | prepended to the enumerator. | |
91c24f0a | 6578 | |
72bf9492 DJ |
6579 | There are two complexities. One is DW_AT_specification; in this |
6580 | case "parent" means the parent of the target of the specification, | |
6581 | instead of the direct parent of the DIE. The other is compilers | |
6582 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6583 | the fully qualified name of structure types from their members' | |
6584 | linkage names. This must be done using the DIE's children rather | |
6585 | than the children of any DW_AT_specification target. We only need | |
6586 | to do this for structures at the top level, i.e. if the target of | |
6587 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6588 | have a parent. */ | |
6589 | ||
6590 | /* Compute the scope prefix associated with PDI's parent, in | |
6591 | compilation unit CU. The result will be allocated on CU's | |
6592 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6593 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6594 | static const char * |
72bf9492 DJ |
6595 | partial_die_parent_scope (struct partial_die_info *pdi, |
6596 | struct dwarf2_cu *cu) | |
6597 | { | |
15d034d0 | 6598 | const char *grandparent_scope; |
72bf9492 | 6599 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6600 | |
72bf9492 DJ |
6601 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6602 | then this means the parent of the specification DIE. */ | |
6603 | ||
6604 | real_pdi = pdi; | |
72bf9492 | 6605 | while (real_pdi->has_specification) |
36586728 TT |
6606 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6607 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6608 | |
6609 | parent = real_pdi->die_parent; | |
6610 | if (parent == NULL) | |
6611 | return NULL; | |
6612 | ||
6613 | if (parent->scope_set) | |
6614 | return parent->scope; | |
6615 | ||
6616 | fixup_partial_die (parent, cu); | |
6617 | ||
10b3939b | 6618 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6619 | |
acebe513 UW |
6620 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6621 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6622 | Work around this problem here. */ | |
6623 | if (cu->language == language_cplus | |
6e70227d | 6624 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6625 | && strcmp (parent->name, "::") == 0 |
6626 | && grandparent_scope == NULL) | |
6627 | { | |
6628 | parent->scope = NULL; | |
6629 | parent->scope_set = 1; | |
6630 | return NULL; | |
6631 | } | |
6632 | ||
9c6c53f7 SA |
6633 | if (pdi->tag == DW_TAG_enumerator) |
6634 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6635 | parent->scope = grandparent_scope; | |
6636 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6637 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6638 | || parent->tag == DW_TAG_structure_type |
6639 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6640 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6641 | || parent->tag == DW_TAG_union_type |
6642 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6643 | { |
6644 | if (grandparent_scope == NULL) | |
6645 | parent->scope = parent->name; | |
6646 | else | |
3e43a32a MS |
6647 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6648 | grandparent_scope, | |
f55ee35c | 6649 | parent->name, 0, cu); |
72bf9492 | 6650 | } |
72bf9492 DJ |
6651 | else |
6652 | { | |
6653 | /* FIXME drow/2004-04-01: What should we be doing with | |
6654 | function-local names? For partial symbols, we should probably be | |
6655 | ignoring them. */ | |
6656 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6657 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6658 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6659 | parent->scope = grandparent_scope; |
c906108c SS |
6660 | } |
6661 | ||
72bf9492 DJ |
6662 | parent->scope_set = 1; |
6663 | return parent->scope; | |
6664 | } | |
6665 | ||
6666 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6667 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6668 | |
72bf9492 DJ |
6669 | static char * |
6670 | partial_die_full_name (struct partial_die_info *pdi, | |
6671 | struct dwarf2_cu *cu) | |
6672 | { | |
15d034d0 | 6673 | const char *parent_scope; |
72bf9492 | 6674 | |
98bfdba5 PA |
6675 | /* If this is a template instantiation, we can not work out the |
6676 | template arguments from partial DIEs. So, unfortunately, we have | |
6677 | to go through the full DIEs. At least any work we do building | |
6678 | types here will be reused if full symbols are loaded later. */ | |
6679 | if (pdi->has_template_arguments) | |
6680 | { | |
6681 | fixup_partial_die (pdi, cu); | |
6682 | ||
6683 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6684 | { | |
6685 | struct die_info *die; | |
6686 | struct attribute attr; | |
6687 | struct dwarf2_cu *ref_cu = cu; | |
6688 | ||
b64f50a1 | 6689 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
6690 | attr.name = 0; |
6691 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 6692 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6693 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6694 | ||
6695 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6696 | } | |
6697 | } | |
6698 | ||
72bf9492 DJ |
6699 | parent_scope = partial_die_parent_scope (pdi, cu); |
6700 | if (parent_scope == NULL) | |
6701 | return NULL; | |
6702 | else | |
f55ee35c | 6703 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6704 | } |
6705 | ||
6706 | static void | |
72bf9492 | 6707 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6708 | { |
e7c27a73 | 6709 | struct objfile *objfile = cu->objfile; |
c906108c | 6710 | CORE_ADDR addr = 0; |
15d034d0 | 6711 | const char *actual_name = NULL; |
e142c38c | 6712 | CORE_ADDR baseaddr; |
15d034d0 | 6713 | char *built_actual_name; |
e142c38c DJ |
6714 | |
6715 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6716 | |
15d034d0 TT |
6717 | built_actual_name = partial_die_full_name (pdi, cu); |
6718 | if (built_actual_name != NULL) | |
6719 | actual_name = built_actual_name; | |
63d06c5c | 6720 | |
72bf9492 DJ |
6721 | if (actual_name == NULL) |
6722 | actual_name = pdi->name; | |
6723 | ||
c906108c SS |
6724 | switch (pdi->tag) |
6725 | { | |
6726 | case DW_TAG_subprogram: | |
2cfa0c8d | 6727 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6728 | { |
2cfa0c8d JB |
6729 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6730 | of the global scope. But in Ada, we want to be able to access | |
6731 | nested procedures globally. So all Ada subprograms are stored | |
6732 | in the global scope. */ | |
f47fb265 | 6733 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6734 | mst_text, objfile); */ |
f47fb265 | 6735 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6736 | built_actual_name != NULL, |
f47fb265 MS |
6737 | VAR_DOMAIN, LOC_BLOCK, |
6738 | &objfile->global_psymbols, | |
6739 | 0, pdi->lowpc + baseaddr, | |
6740 | cu->language, objfile); | |
c906108c SS |
6741 | } |
6742 | else | |
6743 | { | |
f47fb265 | 6744 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6745 | mst_file_text, objfile); */ |
f47fb265 | 6746 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6747 | built_actual_name != NULL, |
f47fb265 MS |
6748 | VAR_DOMAIN, LOC_BLOCK, |
6749 | &objfile->static_psymbols, | |
6750 | 0, pdi->lowpc + baseaddr, | |
6751 | cu->language, objfile); | |
c906108c SS |
6752 | } |
6753 | break; | |
72929c62 JB |
6754 | case DW_TAG_constant: |
6755 | { | |
6756 | struct psymbol_allocation_list *list; | |
6757 | ||
6758 | if (pdi->is_external) | |
6759 | list = &objfile->global_psymbols; | |
6760 | else | |
6761 | list = &objfile->static_psymbols; | |
f47fb265 | 6762 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6763 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
f47fb265 | 6764 | list, 0, 0, cu->language, objfile); |
72929c62 JB |
6765 | } |
6766 | break; | |
c906108c | 6767 | case DW_TAG_variable: |
95554aad TT |
6768 | if (pdi->d.locdesc) |
6769 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6770 | |
95554aad | 6771 | if (pdi->d.locdesc |
caac4577 JG |
6772 | && addr == 0 |
6773 | && !dwarf2_per_objfile->has_section_at_zero) | |
6774 | { | |
6775 | /* A global or static variable may also have been stripped | |
6776 | out by the linker if unused, in which case its address | |
6777 | will be nullified; do not add such variables into partial | |
6778 | symbol table then. */ | |
6779 | } | |
6780 | else if (pdi->is_external) | |
c906108c SS |
6781 | { |
6782 | /* Global Variable. | |
6783 | Don't enter into the minimal symbol tables as there is | |
6784 | a minimal symbol table entry from the ELF symbols already. | |
6785 | Enter into partial symbol table if it has a location | |
6786 | descriptor or a type. | |
6787 | If the location descriptor is missing, new_symbol will create | |
6788 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6789 | be determined from the minimal symbol table whenever the variable | |
6790 | is referenced. | |
6791 | The address for the partial symbol table entry is not | |
6792 | used by GDB, but it comes in handy for debugging partial symbol | |
6793 | table building. */ | |
6794 | ||
95554aad | 6795 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6796 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6797 | built_actual_name != NULL, |
f47fb265 MS |
6798 | VAR_DOMAIN, LOC_STATIC, |
6799 | &objfile->global_psymbols, | |
6800 | 0, addr + baseaddr, | |
6801 | cu->language, objfile); | |
c906108c SS |
6802 | } |
6803 | else | |
6804 | { | |
0963b4bd | 6805 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 6806 | if (pdi->d.locdesc == NULL) |
decbce07 | 6807 | { |
15d034d0 | 6808 | xfree (built_actual_name); |
decbce07 MS |
6809 | return; |
6810 | } | |
f47fb265 | 6811 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 6812 | mst_file_data, objfile); */ |
f47fb265 | 6813 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6814 | built_actual_name != NULL, |
f47fb265 MS |
6815 | VAR_DOMAIN, LOC_STATIC, |
6816 | &objfile->static_psymbols, | |
6817 | 0, addr + baseaddr, | |
6818 | cu->language, objfile); | |
c906108c SS |
6819 | } |
6820 | break; | |
6821 | case DW_TAG_typedef: | |
6822 | case DW_TAG_base_type: | |
a02abb62 | 6823 | case DW_TAG_subrange_type: |
38d518c9 | 6824 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6825 | built_actual_name != NULL, |
176620f1 | 6826 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6827 | &objfile->static_psymbols, |
e142c38c | 6828 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6829 | break; |
74921315 | 6830 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
6831 | case DW_TAG_namespace: |
6832 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6833 | built_actual_name != NULL, |
72bf9492 DJ |
6834 | VAR_DOMAIN, LOC_TYPEDEF, |
6835 | &objfile->global_psymbols, | |
6836 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6837 | break; | |
530e8392 KB |
6838 | case DW_TAG_module: |
6839 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
6840 | built_actual_name != NULL, | |
6841 | MODULE_DOMAIN, LOC_TYPEDEF, | |
6842 | &objfile->global_psymbols, | |
6843 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6844 | break; | |
c906108c | 6845 | case DW_TAG_class_type: |
680b30c7 | 6846 | case DW_TAG_interface_type: |
c906108c SS |
6847 | case DW_TAG_structure_type: |
6848 | case DW_TAG_union_type: | |
6849 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
6850 | /* Skip external references. The DWARF standard says in the section |
6851 | about "Structure, Union, and Class Type Entries": "An incomplete | |
6852 | structure, union or class type is represented by a structure, | |
6853 | union or class entry that does not have a byte size attribute | |
6854 | and that has a DW_AT_declaration attribute." */ | |
6855 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 6856 | { |
15d034d0 | 6857 | xfree (built_actual_name); |
decbce07 MS |
6858 | return; |
6859 | } | |
fa4028e9 | 6860 | |
63d06c5c DC |
6861 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
6862 | static vs. global. */ | |
38d518c9 | 6863 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6864 | built_actual_name != NULL, |
176620f1 | 6865 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
6866 | (cu->language == language_cplus |
6867 | || cu->language == language_java) | |
63d06c5c DC |
6868 | ? &objfile->global_psymbols |
6869 | : &objfile->static_psymbols, | |
e142c38c | 6870 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6871 | |
c906108c SS |
6872 | break; |
6873 | case DW_TAG_enumerator: | |
38d518c9 | 6874 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6875 | built_actual_name != NULL, |
176620f1 | 6876 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
6877 | (cu->language == language_cplus |
6878 | || cu->language == language_java) | |
f6fe98ef DJ |
6879 | ? &objfile->global_psymbols |
6880 | : &objfile->static_psymbols, | |
e142c38c | 6881 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
6882 | break; |
6883 | default: | |
6884 | break; | |
6885 | } | |
5c4e30ca | 6886 | |
15d034d0 | 6887 | xfree (built_actual_name); |
c906108c SS |
6888 | } |
6889 | ||
5c4e30ca DC |
6890 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6891 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6892 | the name of the enclosing namespace. */ | |
91c24f0a | 6893 | |
72bf9492 DJ |
6894 | static void |
6895 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6896 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6897 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6898 | { |
72bf9492 | 6899 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6900 | |
72bf9492 | 6901 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6902 | |
6903 | /* Now scan partial symbols in that namespace. */ | |
6904 | ||
91c24f0a | 6905 | if (pdi->has_children) |
5734ee8b | 6906 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6907 | } |
6908 | ||
5d7cb8df JK |
6909 | /* Read a partial die corresponding to a Fortran module. */ |
6910 | ||
6911 | static void | |
6912 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6913 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6914 | { | |
530e8392 KB |
6915 | /* Add a symbol for the namespace. */ |
6916 | ||
6917 | add_partial_symbol (pdi, cu); | |
6918 | ||
f55ee35c | 6919 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6920 | |
6921 | if (pdi->has_children) | |
6922 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6923 | } | |
6924 | ||
bc30ff58 JB |
6925 | /* Read a partial die corresponding to a subprogram and create a partial |
6926 | symbol for that subprogram. When the CU language allows it, this | |
6927 | routine also defines a partial symbol for each nested subprogram | |
6928 | that this subprogram contains. | |
6e70227d | 6929 | |
bc30ff58 JB |
6930 | DIE my also be a lexical block, in which case we simply search |
6931 | recursively for suprograms defined inside that lexical block. | |
6932 | Again, this is only performed when the CU language allows this | |
6933 | type of definitions. */ | |
6934 | ||
6935 | static void | |
6936 | add_partial_subprogram (struct partial_die_info *pdi, | |
6937 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6938 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6939 | { |
6940 | if (pdi->tag == DW_TAG_subprogram) | |
6941 | { | |
6942 | if (pdi->has_pc_info) | |
6943 | { | |
6944 | if (pdi->lowpc < *lowpc) | |
6945 | *lowpc = pdi->lowpc; | |
6946 | if (pdi->highpc > *highpc) | |
6947 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6948 | if (need_pc) |
6949 | { | |
6950 | CORE_ADDR baseaddr; | |
6951 | struct objfile *objfile = cu->objfile; | |
6952 | ||
6953 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6954 | SECT_OFF_TEXT (objfile)); | |
6955 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6956 | pdi->lowpc + baseaddr, |
6957 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6958 | cu->per_cu->v.psymtab); |
5734ee8b | 6959 | } |
481860b3 GB |
6960 | } |
6961 | ||
6962 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6963 | { | |
bc30ff58 | 6964 | if (!pdi->is_declaration) |
e8d05480 JB |
6965 | /* Ignore subprogram DIEs that do not have a name, they are |
6966 | illegal. Do not emit a complaint at this point, we will | |
6967 | do so when we convert this psymtab into a symtab. */ | |
6968 | if (pdi->name) | |
6969 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6970 | } |
6971 | } | |
6e70227d | 6972 | |
bc30ff58 JB |
6973 | if (! pdi->has_children) |
6974 | return; | |
6975 | ||
6976 | if (cu->language == language_ada) | |
6977 | { | |
6978 | pdi = pdi->die_child; | |
6979 | while (pdi != NULL) | |
6980 | { | |
6981 | fixup_partial_die (pdi, cu); | |
6982 | if (pdi->tag == DW_TAG_subprogram | |
6983 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6984 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6985 | pdi = pdi->die_sibling; |
6986 | } | |
6987 | } | |
6988 | } | |
6989 | ||
91c24f0a DC |
6990 | /* Read a partial die corresponding to an enumeration type. */ |
6991 | ||
72bf9492 DJ |
6992 | static void |
6993 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6994 | struct dwarf2_cu *cu) | |
91c24f0a | 6995 | { |
72bf9492 | 6996 | struct partial_die_info *pdi; |
91c24f0a DC |
6997 | |
6998 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6999 | add_partial_symbol (enum_pdi, cu); |
7000 | ||
7001 | pdi = enum_pdi->die_child; | |
7002 | while (pdi) | |
91c24f0a | 7003 | { |
72bf9492 | 7004 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7005 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7006 | else |
72bf9492 DJ |
7007 | add_partial_symbol (pdi, cu); |
7008 | pdi = pdi->die_sibling; | |
91c24f0a | 7009 | } |
91c24f0a DC |
7010 | } |
7011 | ||
6caca83c CC |
7012 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7013 | ||
7014 | static unsigned int | |
d521ce57 | 7015 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7016 | { |
7017 | unsigned int bytes_read; | |
7018 | ||
7019 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7020 | } | |
7021 | ||
4bb7a0a7 DJ |
7022 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7023 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7024 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7025 | the initial number. */ | |
7026 | ||
7027 | static struct abbrev_info * | |
d521ce57 | 7028 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7029 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7030 | { |
7031 | bfd *abfd = cu->objfile->obfd; | |
7032 | unsigned int abbrev_number; | |
7033 | struct abbrev_info *abbrev; | |
7034 | ||
7035 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7036 | ||
7037 | if (abbrev_number == 0) | |
7038 | return NULL; | |
7039 | ||
433df2d4 | 7040 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7041 | if (!abbrev) |
7042 | { | |
3e43a32a MS |
7043 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
7044 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
7045 | } |
7046 | ||
7047 | return abbrev; | |
7048 | } | |
7049 | ||
93311388 DE |
7050 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7051 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7052 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7053 | ||
d521ce57 TT |
7054 | static const gdb_byte * |
7055 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7056 | { |
dee91e82 | 7057 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7058 | struct abbrev_info *abbrev; |
7059 | unsigned int bytes_read; | |
7060 | ||
7061 | while (1) | |
7062 | { | |
7063 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7064 | if (abbrev == NULL) | |
7065 | return info_ptr + bytes_read; | |
7066 | else | |
dee91e82 | 7067 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7068 | } |
7069 | } | |
7070 | ||
93311388 DE |
7071 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7072 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7073 | abbrev corresponding to that skipped uleb128 should be passed in |
7074 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7075 | children. */ | |
7076 | ||
d521ce57 TT |
7077 | static const gdb_byte * |
7078 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7079 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7080 | { |
7081 | unsigned int bytes_read; | |
7082 | struct attribute attr; | |
dee91e82 DE |
7083 | bfd *abfd = reader->abfd; |
7084 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7085 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7086 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 7087 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
7088 | unsigned int form, i; |
7089 | ||
7090 | for (i = 0; i < abbrev->num_attrs; i++) | |
7091 | { | |
7092 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7093 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7094 | { | |
dee91e82 | 7095 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7096 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7097 | complaint (&symfile_complaints, |
7098 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7099 | else |
b9502d3f WN |
7100 | { |
7101 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
7102 | const gdb_byte *sibling_ptr = buffer + off; | |
7103 | ||
7104 | if (sibling_ptr < info_ptr) | |
7105 | complaint (&symfile_complaints, | |
7106 | _("DW_AT_sibling points backwards")); | |
7107 | else | |
7108 | return sibling_ptr; | |
7109 | } | |
4bb7a0a7 DJ |
7110 | } |
7111 | ||
7112 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7113 | form = abbrev->attrs[i].form; | |
7114 | skip_attribute: | |
7115 | switch (form) | |
7116 | { | |
4bb7a0a7 | 7117 | case DW_FORM_ref_addr: |
ae411497 TT |
7118 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7119 | and later it is offset sized. */ | |
7120 | if (cu->header.version == 2) | |
7121 | info_ptr += cu->header.addr_size; | |
7122 | else | |
7123 | info_ptr += cu->header.offset_size; | |
7124 | break; | |
36586728 TT |
7125 | case DW_FORM_GNU_ref_alt: |
7126 | info_ptr += cu->header.offset_size; | |
7127 | break; | |
ae411497 | 7128 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7129 | info_ptr += cu->header.addr_size; |
7130 | break; | |
7131 | case DW_FORM_data1: | |
7132 | case DW_FORM_ref1: | |
7133 | case DW_FORM_flag: | |
7134 | info_ptr += 1; | |
7135 | break; | |
2dc7f7b3 TT |
7136 | case DW_FORM_flag_present: |
7137 | break; | |
4bb7a0a7 DJ |
7138 | case DW_FORM_data2: |
7139 | case DW_FORM_ref2: | |
7140 | info_ptr += 2; | |
7141 | break; | |
7142 | case DW_FORM_data4: | |
7143 | case DW_FORM_ref4: | |
7144 | info_ptr += 4; | |
7145 | break; | |
7146 | case DW_FORM_data8: | |
7147 | case DW_FORM_ref8: | |
55f1336d | 7148 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7149 | info_ptr += 8; |
7150 | break; | |
7151 | case DW_FORM_string: | |
9b1c24c8 | 7152 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7153 | info_ptr += bytes_read; |
7154 | break; | |
2dc7f7b3 | 7155 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7156 | case DW_FORM_strp: |
36586728 | 7157 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7158 | info_ptr += cu->header.offset_size; |
7159 | break; | |
2dc7f7b3 | 7160 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7161 | case DW_FORM_block: |
7162 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7163 | info_ptr += bytes_read; | |
7164 | break; | |
7165 | case DW_FORM_block1: | |
7166 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7167 | break; | |
7168 | case DW_FORM_block2: | |
7169 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7170 | break; | |
7171 | case DW_FORM_block4: | |
7172 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7173 | break; | |
7174 | case DW_FORM_sdata: | |
7175 | case DW_FORM_udata: | |
7176 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7177 | case DW_FORM_GNU_addr_index: |
7178 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7179 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7180 | break; |
7181 | case DW_FORM_indirect: | |
7182 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7183 | info_ptr += bytes_read; | |
7184 | /* We need to continue parsing from here, so just go back to | |
7185 | the top. */ | |
7186 | goto skip_attribute; | |
7187 | ||
7188 | default: | |
3e43a32a MS |
7189 | error (_("Dwarf Error: Cannot handle %s " |
7190 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7191 | dwarf_form_name (form), |
7192 | bfd_get_filename (abfd)); | |
7193 | } | |
7194 | } | |
7195 | ||
7196 | if (abbrev->has_children) | |
dee91e82 | 7197 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7198 | else |
7199 | return info_ptr; | |
7200 | } | |
7201 | ||
93311388 | 7202 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7203 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7204 | |
d521ce57 | 7205 | static const gdb_byte * |
dee91e82 DE |
7206 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7207 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7208 | const gdb_byte *info_ptr) |
91c24f0a DC |
7209 | { |
7210 | /* Do we know the sibling already? */ | |
72bf9492 | 7211 | |
91c24f0a DC |
7212 | if (orig_pdi->sibling) |
7213 | return orig_pdi->sibling; | |
7214 | ||
7215 | /* Are there any children to deal with? */ | |
7216 | ||
7217 | if (!orig_pdi->has_children) | |
7218 | return info_ptr; | |
7219 | ||
4bb7a0a7 | 7220 | /* Skip the children the long way. */ |
91c24f0a | 7221 | |
dee91e82 | 7222 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7223 | } |
7224 | ||
257e7a09 | 7225 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7226 | not NULL. */ |
c906108c SS |
7227 | |
7228 | static void | |
257e7a09 YQ |
7229 | dwarf2_read_symtab (struct partial_symtab *self, |
7230 | struct objfile *objfile) | |
c906108c | 7231 | { |
257e7a09 | 7232 | if (self->readin) |
c906108c | 7233 | { |
442e4d9c | 7234 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7235 | self->filename); |
442e4d9c YQ |
7236 | } |
7237 | else | |
7238 | { | |
7239 | if (info_verbose) | |
c906108c | 7240 | { |
442e4d9c | 7241 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7242 | self->filename); |
442e4d9c | 7243 | gdb_flush (gdb_stdout); |
c906108c | 7244 | } |
c906108c | 7245 | |
442e4d9c YQ |
7246 | /* Restore our global data. */ |
7247 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10b3939b | 7248 | |
442e4d9c YQ |
7249 | /* If this psymtab is constructed from a debug-only objfile, the |
7250 | has_section_at_zero flag will not necessarily be correct. We | |
7251 | can get the correct value for this flag by looking at the data | |
7252 | associated with the (presumably stripped) associated objfile. */ | |
7253 | if (objfile->separate_debug_objfile_backlink) | |
7254 | { | |
7255 | struct dwarf2_per_objfile *dpo_backlink | |
7256 | = objfile_data (objfile->separate_debug_objfile_backlink, | |
7257 | dwarf2_objfile_data_key); | |
9a619af0 | 7258 | |
442e4d9c YQ |
7259 | dwarf2_per_objfile->has_section_at_zero |
7260 | = dpo_backlink->has_section_at_zero; | |
7261 | } | |
b2ab525c | 7262 | |
442e4d9c | 7263 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7264 | |
257e7a09 | 7265 | psymtab_to_symtab_1 (self); |
c906108c | 7266 | |
442e4d9c YQ |
7267 | /* Finish up the debug error message. */ |
7268 | if (info_verbose) | |
7269 | printf_filtered (_("done.\n")); | |
c906108c | 7270 | } |
95554aad TT |
7271 | |
7272 | process_cu_includes (); | |
c906108c | 7273 | } |
9cdd5dbd DE |
7274 | \f |
7275 | /* Reading in full CUs. */ | |
c906108c | 7276 | |
10b3939b DJ |
7277 | /* Add PER_CU to the queue. */ |
7278 | ||
7279 | static void | |
95554aad TT |
7280 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7281 | enum language pretend_language) | |
10b3939b DJ |
7282 | { |
7283 | struct dwarf2_queue_item *item; | |
7284 | ||
7285 | per_cu->queued = 1; | |
7286 | item = xmalloc (sizeof (*item)); | |
7287 | item->per_cu = per_cu; | |
95554aad | 7288 | item->pretend_language = pretend_language; |
10b3939b DJ |
7289 | item->next = NULL; |
7290 | ||
7291 | if (dwarf2_queue == NULL) | |
7292 | dwarf2_queue = item; | |
7293 | else | |
7294 | dwarf2_queue_tail->next = item; | |
7295 | ||
7296 | dwarf2_queue_tail = item; | |
7297 | } | |
7298 | ||
89e63ee4 DE |
7299 | /* If PER_CU is not yet queued, add it to the queue. |
7300 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7301 | dependency. | |
0907af0c | 7302 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7303 | meaning either PER_CU is already queued or it is already loaded. |
7304 | ||
7305 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7306 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7307 | |
7308 | static int | |
89e63ee4 | 7309 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7310 | struct dwarf2_per_cu_data *per_cu, |
7311 | enum language pretend_language) | |
7312 | { | |
7313 | /* We may arrive here during partial symbol reading, if we need full | |
7314 | DIEs to process an unusual case (e.g. template arguments). Do | |
7315 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7316 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7317 | { | |
7318 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7319 | return 1; | |
7320 | return 0; | |
7321 | } | |
7322 | ||
7323 | /* Mark the dependence relation so that we don't flush PER_CU | |
7324 | too early. */ | |
89e63ee4 DE |
7325 | if (dependent_cu != NULL) |
7326 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7327 | |
7328 | /* If it's already on the queue, we have nothing to do. */ | |
7329 | if (per_cu->queued) | |
7330 | return 0; | |
7331 | ||
7332 | /* If the compilation unit is already loaded, just mark it as | |
7333 | used. */ | |
7334 | if (per_cu->cu != NULL) | |
7335 | { | |
7336 | per_cu->cu->last_used = 0; | |
7337 | return 0; | |
7338 | } | |
7339 | ||
7340 | /* Add it to the queue. */ | |
7341 | queue_comp_unit (per_cu, pretend_language); | |
7342 | ||
7343 | return 1; | |
7344 | } | |
7345 | ||
10b3939b DJ |
7346 | /* Process the queue. */ |
7347 | ||
7348 | static void | |
a0f42c21 | 7349 | process_queue (void) |
10b3939b DJ |
7350 | { |
7351 | struct dwarf2_queue_item *item, *next_item; | |
7352 | ||
45cfd468 DE |
7353 | if (dwarf2_read_debug) |
7354 | { | |
7355 | fprintf_unfiltered (gdb_stdlog, | |
7356 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7357 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7358 | } |
7359 | ||
03dd20cc DJ |
7360 | /* The queue starts out with one item, but following a DIE reference |
7361 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7362 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7363 | { | |
9291a0cd TT |
7364 | if (dwarf2_per_objfile->using_index |
7365 | ? !item->per_cu->v.quick->symtab | |
7366 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
7367 | { |
7368 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7369 | unsigned int debug_print_threshold; |
247f5c4f | 7370 | char buf[100]; |
f4dc4d17 | 7371 | |
247f5c4f | 7372 | if (per_cu->is_debug_types) |
f4dc4d17 | 7373 | { |
247f5c4f DE |
7374 | struct signatured_type *sig_type = |
7375 | (struct signatured_type *) per_cu; | |
7376 | ||
7377 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 DE |
7378 | hex_string (sig_type->signature), |
7379 | per_cu->offset.sect_off); | |
7380 | /* There can be 100s of TUs. | |
7381 | Only print them in verbose mode. */ | |
7382 | debug_print_threshold = 2; | |
f4dc4d17 | 7383 | } |
247f5c4f | 7384 | else |
73be47f5 DE |
7385 | { |
7386 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7387 | debug_print_threshold = 1; | |
7388 | } | |
247f5c4f | 7389 | |
73be47f5 | 7390 | if (dwarf2_read_debug >= debug_print_threshold) |
247f5c4f | 7391 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7392 | |
7393 | if (per_cu->is_debug_types) | |
7394 | process_full_type_unit (per_cu, item->pretend_language); | |
7395 | else | |
7396 | process_full_comp_unit (per_cu, item->pretend_language); | |
7397 | ||
73be47f5 | 7398 | if (dwarf2_read_debug >= debug_print_threshold) |
247f5c4f | 7399 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7400 | } |
10b3939b DJ |
7401 | |
7402 | item->per_cu->queued = 0; | |
7403 | next_item = item->next; | |
7404 | xfree (item); | |
7405 | } | |
7406 | ||
7407 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
7408 | |
7409 | if (dwarf2_read_debug) | |
7410 | { | |
7411 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7412 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7413 | } |
10b3939b DJ |
7414 | } |
7415 | ||
7416 | /* Free all allocated queue entries. This function only releases anything if | |
7417 | an error was thrown; if the queue was processed then it would have been | |
7418 | freed as we went along. */ | |
7419 | ||
7420 | static void | |
7421 | dwarf2_release_queue (void *dummy) | |
7422 | { | |
7423 | struct dwarf2_queue_item *item, *last; | |
7424 | ||
7425 | item = dwarf2_queue; | |
7426 | while (item) | |
7427 | { | |
7428 | /* Anything still marked queued is likely to be in an | |
7429 | inconsistent state, so discard it. */ | |
7430 | if (item->per_cu->queued) | |
7431 | { | |
7432 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7433 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7434 | item->per_cu->queued = 0; |
7435 | } | |
7436 | ||
7437 | last = item; | |
7438 | item = item->next; | |
7439 | xfree (last); | |
7440 | } | |
7441 | ||
7442 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7443 | } | |
7444 | ||
7445 | /* Read in full symbols for PST, and anything it depends on. */ | |
7446 | ||
c906108c | 7447 | static void |
fba45db2 | 7448 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7449 | { |
10b3939b | 7450 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7451 | int i; |
7452 | ||
95554aad TT |
7453 | if (pst->readin) |
7454 | return; | |
7455 | ||
aaa75496 | 7456 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7457 | if (!pst->dependencies[i]->readin |
7458 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7459 | { |
7460 | /* Inform about additional files that need to be read in. */ | |
7461 | if (info_verbose) | |
7462 | { | |
a3f17187 | 7463 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7464 | fputs_filtered (" ", gdb_stdout); |
7465 | wrap_here (""); | |
7466 | fputs_filtered ("and ", gdb_stdout); | |
7467 | wrap_here (""); | |
7468 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7469 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7470 | gdb_flush (gdb_stdout); |
7471 | } | |
7472 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7473 | } | |
7474 | ||
e38df1d0 | 7475 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
7476 | |
7477 | if (per_cu == NULL) | |
aaa75496 JB |
7478 | { |
7479 | /* It's an include file, no symbols to read for it. | |
7480 | Everything is in the parent symtab. */ | |
7481 | pst->readin = 1; | |
7482 | return; | |
7483 | } | |
c906108c | 7484 | |
a0f42c21 | 7485 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7486 | } |
7487 | ||
dee91e82 DE |
7488 | /* Trivial hash function for die_info: the hash value of a DIE |
7489 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7490 | |
dee91e82 DE |
7491 | static hashval_t |
7492 | die_hash (const void *item) | |
10b3939b | 7493 | { |
dee91e82 | 7494 | const struct die_info *die = item; |
6502dd73 | 7495 | |
dee91e82 DE |
7496 | return die->offset.sect_off; |
7497 | } | |
63d06c5c | 7498 | |
dee91e82 DE |
7499 | /* Trivial comparison function for die_info structures: two DIEs |
7500 | are equal if they have the same offset. */ | |
98bfdba5 | 7501 | |
dee91e82 DE |
7502 | static int |
7503 | die_eq (const void *item_lhs, const void *item_rhs) | |
7504 | { | |
7505 | const struct die_info *die_lhs = item_lhs; | |
7506 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 7507 | |
dee91e82 DE |
7508 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7509 | } | |
c906108c | 7510 | |
dee91e82 DE |
7511 | /* die_reader_func for load_full_comp_unit. |
7512 | This is identical to read_signatured_type_reader, | |
7513 | but is kept separate for now. */ | |
c906108c | 7514 | |
dee91e82 DE |
7515 | static void |
7516 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7517 | const gdb_byte *info_ptr, |
dee91e82 DE |
7518 | struct die_info *comp_unit_die, |
7519 | int has_children, | |
7520 | void *data) | |
7521 | { | |
7522 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 7523 | enum language *language_ptr = data; |
6caca83c | 7524 | |
dee91e82 DE |
7525 | gdb_assert (cu->die_hash == NULL); |
7526 | cu->die_hash = | |
7527 | htab_create_alloc_ex (cu->header.length / 12, | |
7528 | die_hash, | |
7529 | die_eq, | |
7530 | NULL, | |
7531 | &cu->comp_unit_obstack, | |
7532 | hashtab_obstack_allocate, | |
7533 | dummy_obstack_deallocate); | |
e142c38c | 7534 | |
dee91e82 DE |
7535 | if (has_children) |
7536 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7537 | &info_ptr, comp_unit_die); | |
7538 | cu->dies = comp_unit_die; | |
7539 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7540 | |
7541 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7542 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7543 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7544 | or we won't be able to build types correctly. |
7545 | Similarly, if we do not read the producer, we can not apply | |
7546 | producer-specific interpretation. */ | |
95554aad | 7547 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7548 | } |
10b3939b | 7549 | |
dee91e82 | 7550 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7551 | |
dee91e82 | 7552 | static void |
95554aad TT |
7553 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7554 | enum language pretend_language) | |
dee91e82 | 7555 | { |
3019eac3 | 7556 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7557 | |
f4dc4d17 DE |
7558 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7559 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7560 | } |
7561 | ||
3da10d80 KS |
7562 | /* Add a DIE to the delayed physname list. */ |
7563 | ||
7564 | static void | |
7565 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7566 | const char *name, struct die_info *die, | |
7567 | struct dwarf2_cu *cu) | |
7568 | { | |
7569 | struct delayed_method_info mi; | |
7570 | mi.type = type; | |
7571 | mi.fnfield_index = fnfield_index; | |
7572 | mi.index = index; | |
7573 | mi.name = name; | |
7574 | mi.die = die; | |
7575 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7576 | } | |
7577 | ||
7578 | /* A cleanup for freeing the delayed method list. */ | |
7579 | ||
7580 | static void | |
7581 | free_delayed_list (void *ptr) | |
7582 | { | |
7583 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7584 | if (cu->method_list != NULL) | |
7585 | { | |
7586 | VEC_free (delayed_method_info, cu->method_list); | |
7587 | cu->method_list = NULL; | |
7588 | } | |
7589 | } | |
7590 | ||
7591 | /* Compute the physnames of any methods on the CU's method list. | |
7592 | ||
7593 | The computation of method physnames is delayed in order to avoid the | |
7594 | (bad) condition that one of the method's formal parameters is of an as yet | |
7595 | incomplete type. */ | |
7596 | ||
7597 | static void | |
7598 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7599 | { | |
7600 | int i; | |
7601 | struct delayed_method_info *mi; | |
7602 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7603 | { | |
1d06ead6 | 7604 | const char *physname; |
3da10d80 KS |
7605 | struct fn_fieldlist *fn_flp |
7606 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7607 | physname = dwarf2_physname (mi->name, mi->die, cu); |
3da10d80 KS |
7608 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
7609 | } | |
7610 | } | |
7611 | ||
a766d390 DE |
7612 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7613 | and it's not clear if/how imported objects will appear. | |
7614 | To keep Go support simple until that's worked out, | |
7615 | go back through what we've read and create something usable. | |
7616 | We could do this while processing each DIE, and feels kinda cleaner, | |
7617 | but that way is more invasive. | |
7618 | This is to, for example, allow the user to type "p var" or "b main" | |
7619 | without having to specify the package name, and allow lookups | |
7620 | of module.object to work in contexts that use the expression | |
7621 | parser. */ | |
7622 | ||
7623 | static void | |
7624 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7625 | { | |
7626 | char *package_name = NULL; | |
7627 | struct pending *list; | |
7628 | int i; | |
7629 | ||
7630 | for (list = global_symbols; list != NULL; list = list->next) | |
7631 | { | |
7632 | for (i = 0; i < list->nsyms; ++i) | |
7633 | { | |
7634 | struct symbol *sym = list->symbol[i]; | |
7635 | ||
7636 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7637 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7638 | { | |
7639 | char *this_package_name = go_symbol_package_name (sym); | |
7640 | ||
7641 | if (this_package_name == NULL) | |
7642 | continue; | |
7643 | if (package_name == NULL) | |
7644 | package_name = this_package_name; | |
7645 | else | |
7646 | { | |
7647 | if (strcmp (package_name, this_package_name) != 0) | |
7648 | complaint (&symfile_complaints, | |
7649 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 7650 | (SYMBOL_SYMTAB (sym) |
05cba821 | 7651 | ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym)) |
4262abfb | 7652 | : objfile_name (cu->objfile)), |
a766d390 DE |
7653 | this_package_name, package_name); |
7654 | xfree (this_package_name); | |
7655 | } | |
7656 | } | |
7657 | } | |
7658 | } | |
7659 | ||
7660 | if (package_name != NULL) | |
7661 | { | |
7662 | struct objfile *objfile = cu->objfile; | |
10f0c4bb TT |
7663 | const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack, |
7664 | package_name, | |
7665 | strlen (package_name)); | |
a766d390 | 7666 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 7667 | saved_package_name, objfile); |
a766d390 DE |
7668 | struct symbol *sym; |
7669 | ||
7670 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7671 | ||
e623cf5d | 7672 | sym = allocate_symbol (objfile); |
f85f34ed | 7673 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7674 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7675 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7676 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7677 | e.g., "main" finds the "main" module and not C's main(). */ | |
7678 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7679 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7680 | SYMBOL_TYPE (sym) = type; |
7681 | ||
7682 | add_symbol_to_list (sym, &global_symbols); | |
7683 | ||
7684 | xfree (package_name); | |
7685 | } | |
7686 | } | |
7687 | ||
95554aad TT |
7688 | /* Return the symtab for PER_CU. This works properly regardless of |
7689 | whether we're using the index or psymtabs. */ | |
7690 | ||
7691 | static struct symtab * | |
7692 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
7693 | { | |
7694 | return (dwarf2_per_objfile->using_index | |
7695 | ? per_cu->v.quick->symtab | |
7696 | : per_cu->v.psymtab->symtab); | |
7697 | } | |
7698 | ||
7699 | /* A helper function for computing the list of all symbol tables | |
7700 | included by PER_CU. */ | |
7701 | ||
7702 | static void | |
ec94af83 DE |
7703 | recursively_compute_inclusions (VEC (symtab_ptr) **result, |
7704 | htab_t all_children, htab_t all_type_symtabs, | |
f9125b6c TT |
7705 | struct dwarf2_per_cu_data *per_cu, |
7706 | struct symtab *immediate_parent) | |
95554aad TT |
7707 | { |
7708 | void **slot; | |
7709 | int ix; | |
ec94af83 | 7710 | struct symtab *symtab; |
95554aad TT |
7711 | struct dwarf2_per_cu_data *iter; |
7712 | ||
7713 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7714 | if (*slot != NULL) | |
7715 | { | |
7716 | /* This inclusion and its children have been processed. */ | |
7717 | return; | |
7718 | } | |
7719 | ||
7720 | *slot = per_cu; | |
7721 | /* Only add a CU if it has a symbol table. */ | |
ec94af83 DE |
7722 | symtab = get_symtab (per_cu); |
7723 | if (symtab != NULL) | |
7724 | { | |
7725 | /* If this is a type unit only add its symbol table if we haven't | |
7726 | seen it yet (type unit per_cu's can share symtabs). */ | |
7727 | if (per_cu->is_debug_types) | |
7728 | { | |
7729 | slot = htab_find_slot (all_type_symtabs, symtab, INSERT); | |
7730 | if (*slot == NULL) | |
7731 | { | |
7732 | *slot = symtab; | |
7733 | VEC_safe_push (symtab_ptr, *result, symtab); | |
f9125b6c TT |
7734 | if (symtab->user == NULL) |
7735 | symtab->user = immediate_parent; | |
ec94af83 DE |
7736 | } |
7737 | } | |
7738 | else | |
f9125b6c TT |
7739 | { |
7740 | VEC_safe_push (symtab_ptr, *result, symtab); | |
7741 | if (symtab->user == NULL) | |
7742 | symtab->user = immediate_parent; | |
7743 | } | |
ec94af83 | 7744 | } |
95554aad TT |
7745 | |
7746 | for (ix = 0; | |
796a7ff8 | 7747 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7748 | ++ix) |
ec94af83 DE |
7749 | { |
7750 | recursively_compute_inclusions (result, all_children, | |
f9125b6c | 7751 | all_type_symtabs, iter, symtab); |
ec94af83 | 7752 | } |
95554aad TT |
7753 | } |
7754 | ||
7755 | /* Compute the symtab 'includes' fields for the symtab related to | |
7756 | PER_CU. */ | |
7757 | ||
7758 | static void | |
7759 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
7760 | { | |
f4dc4d17 DE |
7761 | gdb_assert (! per_cu->is_debug_types); |
7762 | ||
796a7ff8 | 7763 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7764 | { |
7765 | int ix, len; | |
ec94af83 DE |
7766 | struct dwarf2_per_cu_data *per_cu_iter; |
7767 | struct symtab *symtab_iter; | |
7768 | VEC (symtab_ptr) *result_symtabs = NULL; | |
7769 | htab_t all_children, all_type_symtabs; | |
95554aad TT |
7770 | struct symtab *symtab = get_symtab (per_cu); |
7771 | ||
7772 | /* If we don't have a symtab, we can just skip this case. */ | |
7773 | if (symtab == NULL) | |
7774 | return; | |
7775 | ||
7776 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7777 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7778 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7779 | NULL, xcalloc, xfree); | |
95554aad TT |
7780 | |
7781 | for (ix = 0; | |
796a7ff8 | 7782 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7783 | ix, per_cu_iter); |
95554aad | 7784 | ++ix) |
ec94af83 DE |
7785 | { |
7786 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c TT |
7787 | all_type_symtabs, per_cu_iter, |
7788 | symtab); | |
ec94af83 | 7789 | } |
95554aad | 7790 | |
ec94af83 DE |
7791 | /* Now we have a transitive closure of all the included symtabs. */ |
7792 | len = VEC_length (symtab_ptr, result_symtabs); | |
95554aad TT |
7793 | symtab->includes |
7794 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
7795 | (len + 1) * sizeof (struct symtab *)); | |
7796 | for (ix = 0; | |
ec94af83 | 7797 | VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter); |
95554aad | 7798 | ++ix) |
ec94af83 | 7799 | symtab->includes[ix] = symtab_iter; |
95554aad TT |
7800 | symtab->includes[len] = NULL; |
7801 | ||
ec94af83 | 7802 | VEC_free (symtab_ptr, result_symtabs); |
95554aad | 7803 | htab_delete (all_children); |
ec94af83 | 7804 | htab_delete (all_type_symtabs); |
95554aad TT |
7805 | } |
7806 | } | |
7807 | ||
7808 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7809 | read. */ | |
7810 | ||
7811 | static void | |
7812 | process_cu_includes (void) | |
7813 | { | |
7814 | int ix; | |
7815 | struct dwarf2_per_cu_data *iter; | |
7816 | ||
7817 | for (ix = 0; | |
7818 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
7819 | ix, iter); | |
7820 | ++ix) | |
f4dc4d17 DE |
7821 | { |
7822 | if (! iter->is_debug_types) | |
7823 | compute_symtab_includes (iter); | |
7824 | } | |
95554aad TT |
7825 | |
7826 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
7827 | } | |
7828 | ||
9cdd5dbd | 7829 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
7830 | already been loaded into memory. */ |
7831 | ||
7832 | static void | |
95554aad TT |
7833 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7834 | enum language pretend_language) | |
10b3939b | 7835 | { |
10b3939b | 7836 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 7837 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
7838 | CORE_ADDR lowpc, highpc; |
7839 | struct symtab *symtab; | |
3da10d80 | 7840 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 7841 | CORE_ADDR baseaddr; |
4359dff1 | 7842 | struct block *static_block; |
10b3939b DJ |
7843 | |
7844 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7845 | ||
10b3939b DJ |
7846 | buildsym_init (); |
7847 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 7848 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
7849 | |
7850 | cu->list_in_scope = &file_symbols; | |
c906108c | 7851 | |
95554aad TT |
7852 | cu->language = pretend_language; |
7853 | cu->language_defn = language_def (cu->language); | |
7854 | ||
c906108c | 7855 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 7856 | process_die (cu->dies, cu); |
c906108c | 7857 | |
a766d390 DE |
7858 | /* For now fudge the Go package. */ |
7859 | if (cu->language == language_go) | |
7860 | fixup_go_packaging (cu); | |
7861 | ||
3da10d80 KS |
7862 | /* Now that we have processed all the DIEs in the CU, all the types |
7863 | should be complete, and it should now be safe to compute all of the | |
7864 | physnames. */ | |
7865 | compute_delayed_physnames (cu); | |
7866 | do_cleanups (delayed_list_cleanup); | |
7867 | ||
fae299cd DC |
7868 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
7869 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
7870 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 7871 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 7872 | |
36586728 | 7873 | static_block |
ff546935 | 7874 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1); |
4359dff1 JK |
7875 | |
7876 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
7877 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
7878 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
7879 | addrmap to help ensure it has an accurate map of pc values belonging to | |
7880 | this comp unit. */ | |
7881 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
7882 | ||
7883 | symtab = end_symtab_from_static_block (static_block, objfile, | |
7884 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 7885 | |
8be455d7 | 7886 | if (symtab != NULL) |
c906108c | 7887 | { |
df15bd07 | 7888 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 7889 | |
8be455d7 JK |
7890 | /* Set symtab language to language from DW_AT_language. If the |
7891 | compilation is from a C file generated by language preprocessors, do | |
7892 | not set the language if it was already deduced by start_subfile. */ | |
7893 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7894 | symtab->language = cu->language; | |
7895 | ||
7896 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
7897 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
7898 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
7899 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
7900 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
7901 | |
7902 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
7903 | needed, it would be wrong due to missing DW_AT_producer there. | |
7904 | ||
7905 | Still one can confuse GDB by using non-standard GCC compilation | |
7906 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
7907 | */ | |
ab260dad | 7908 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 7909 | symtab->locations_valid = 1; |
e0d00bc7 JK |
7910 | |
7911 | if (gcc_4_minor >= 5) | |
7912 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
7913 | |
7914 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 7915 | } |
9291a0cd TT |
7916 | |
7917 | if (dwarf2_per_objfile->using_index) | |
7918 | per_cu->v.quick->symtab = symtab; | |
7919 | else | |
7920 | { | |
7921 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7922 | pst->symtab = symtab; | |
7923 | pst->readin = 1; | |
7924 | } | |
c906108c | 7925 | |
95554aad TT |
7926 | /* Push it for inclusion processing later. */ |
7927 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
7928 | ||
c906108c | 7929 | do_cleanups (back_to); |
f4dc4d17 | 7930 | } |
45cfd468 | 7931 | |
f4dc4d17 DE |
7932 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
7933 | already been loaded into memory. */ | |
7934 | ||
7935 | static void | |
7936 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
7937 | enum language pretend_language) | |
7938 | { | |
7939 | struct dwarf2_cu *cu = per_cu->cu; | |
7940 | struct objfile *objfile = per_cu->objfile; | |
7941 | struct symtab *symtab; | |
7942 | struct cleanup *back_to, *delayed_list_cleanup; | |
0186c6a7 DE |
7943 | struct signatured_type *sig_type; |
7944 | ||
7945 | gdb_assert (per_cu->is_debug_types); | |
7946 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7947 | |
7948 | buildsym_init (); | |
7949 | back_to = make_cleanup (really_free_pendings, NULL); | |
7950 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
7951 | ||
7952 | cu->list_in_scope = &file_symbols; | |
7953 | ||
7954 | cu->language = pretend_language; | |
7955 | cu->language_defn = language_def (cu->language); | |
7956 | ||
7957 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7958 | process_die (cu->dies, cu); | |
7959 | ||
7960 | /* For now fudge the Go package. */ | |
7961 | if (cu->language == language_go) | |
7962 | fixup_go_packaging (cu); | |
7963 | ||
7964 | /* Now that we have processed all the DIEs in the CU, all the types | |
7965 | should be complete, and it should now be safe to compute all of the | |
7966 | physnames. */ | |
7967 | compute_delayed_physnames (cu); | |
7968 | do_cleanups (delayed_list_cleanup); | |
7969 | ||
7970 | /* TUs share symbol tables. | |
7971 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7972 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7973 | this TU's symbols to the existing symtab. */ | |
0186c6a7 | 7974 | if (sig_type->type_unit_group->primary_symtab == NULL) |
45cfd468 | 7975 | { |
f4dc4d17 | 7976 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
0186c6a7 | 7977 | sig_type->type_unit_group->primary_symtab = symtab; |
f4dc4d17 DE |
7978 | |
7979 | if (symtab != NULL) | |
7980 | { | |
7981 | /* Set symtab language to language from DW_AT_language. If the | |
7982 | compilation is from a C file generated by language preprocessors, | |
7983 | do not set the language if it was already deduced by | |
7984 | start_subfile. */ | |
7985 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7986 | symtab->language = cu->language; | |
7987 | } | |
7988 | } | |
7989 | else | |
7990 | { | |
7991 | augment_type_symtab (objfile, | |
0186c6a7 DE |
7992 | sig_type->type_unit_group->primary_symtab); |
7993 | symtab = sig_type->type_unit_group->primary_symtab; | |
f4dc4d17 DE |
7994 | } |
7995 | ||
7996 | if (dwarf2_per_objfile->using_index) | |
7997 | per_cu->v.quick->symtab = symtab; | |
7998 | else | |
7999 | { | |
8000 | struct partial_symtab *pst = per_cu->v.psymtab; | |
8001 | pst->symtab = symtab; | |
8002 | pst->readin = 1; | |
45cfd468 | 8003 | } |
f4dc4d17 DE |
8004 | |
8005 | do_cleanups (back_to); | |
c906108c SS |
8006 | } |
8007 | ||
95554aad TT |
8008 | /* Process an imported unit DIE. */ |
8009 | ||
8010 | static void | |
8011 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8012 | { | |
8013 | struct attribute *attr; | |
8014 | ||
f4dc4d17 DE |
8015 | /* For now we don't handle imported units in type units. */ |
8016 | if (cu->per_cu->is_debug_types) | |
8017 | { | |
8018 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8019 | " supported in type units [in module %s]"), | |
4262abfb | 8020 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8021 | } |
8022 | ||
95554aad TT |
8023 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8024 | if (attr != NULL) | |
8025 | { | |
8026 | struct dwarf2_per_cu_data *per_cu; | |
8027 | struct symtab *imported_symtab; | |
8028 | sect_offset offset; | |
36586728 | 8029 | int is_dwz; |
95554aad TT |
8030 | |
8031 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
8032 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
8033 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 8034 | |
69d751e3 | 8035 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8036 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8037 | load_full_comp_unit (per_cu, cu->language); | |
8038 | ||
796a7ff8 | 8039 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8040 | per_cu); |
8041 | } | |
8042 | } | |
8043 | ||
adde2bff DE |
8044 | /* Reset the in_process bit of a die. */ |
8045 | ||
8046 | static void | |
8047 | reset_die_in_process (void *arg) | |
8048 | { | |
8049 | struct die_info *die = arg; | |
8c3cb9fa | 8050 | |
adde2bff DE |
8051 | die->in_process = 0; |
8052 | } | |
8053 | ||
c906108c SS |
8054 | /* Process a die and its children. */ |
8055 | ||
8056 | static void | |
e7c27a73 | 8057 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8058 | { |
adde2bff DE |
8059 | struct cleanup *in_process; |
8060 | ||
8061 | /* We should only be processing those not already in process. */ | |
8062 | gdb_assert (!die->in_process); | |
8063 | ||
8064 | die->in_process = 1; | |
8065 | in_process = make_cleanup (reset_die_in_process,die); | |
8066 | ||
c906108c SS |
8067 | switch (die->tag) |
8068 | { | |
8069 | case DW_TAG_padding: | |
8070 | break; | |
8071 | case DW_TAG_compile_unit: | |
95554aad | 8072 | case DW_TAG_partial_unit: |
e7c27a73 | 8073 | read_file_scope (die, cu); |
c906108c | 8074 | break; |
348e048f DE |
8075 | case DW_TAG_type_unit: |
8076 | read_type_unit_scope (die, cu); | |
8077 | break; | |
c906108c | 8078 | case DW_TAG_subprogram: |
c906108c | 8079 | case DW_TAG_inlined_subroutine: |
edb3359d | 8080 | read_func_scope (die, cu); |
c906108c SS |
8081 | break; |
8082 | case DW_TAG_lexical_block: | |
14898363 L |
8083 | case DW_TAG_try_block: |
8084 | case DW_TAG_catch_block: | |
e7c27a73 | 8085 | read_lexical_block_scope (die, cu); |
c906108c | 8086 | break; |
96408a79 SA |
8087 | case DW_TAG_GNU_call_site: |
8088 | read_call_site_scope (die, cu); | |
8089 | break; | |
c906108c | 8090 | case DW_TAG_class_type: |
680b30c7 | 8091 | case DW_TAG_interface_type: |
c906108c SS |
8092 | case DW_TAG_structure_type: |
8093 | case DW_TAG_union_type: | |
134d01f1 | 8094 | process_structure_scope (die, cu); |
c906108c SS |
8095 | break; |
8096 | case DW_TAG_enumeration_type: | |
134d01f1 | 8097 | process_enumeration_scope (die, cu); |
c906108c | 8098 | break; |
134d01f1 | 8099 | |
f792889a DJ |
8100 | /* These dies have a type, but processing them does not create |
8101 | a symbol or recurse to process the children. Therefore we can | |
8102 | read them on-demand through read_type_die. */ | |
c906108c | 8103 | case DW_TAG_subroutine_type: |
72019c9c | 8104 | case DW_TAG_set_type: |
c906108c | 8105 | case DW_TAG_array_type: |
c906108c | 8106 | case DW_TAG_pointer_type: |
c906108c | 8107 | case DW_TAG_ptr_to_member_type: |
c906108c | 8108 | case DW_TAG_reference_type: |
c906108c | 8109 | case DW_TAG_string_type: |
c906108c | 8110 | break; |
134d01f1 | 8111 | |
c906108c | 8112 | case DW_TAG_base_type: |
a02abb62 | 8113 | case DW_TAG_subrange_type: |
cb249c71 | 8114 | case DW_TAG_typedef: |
134d01f1 DJ |
8115 | /* Add a typedef symbol for the type definition, if it has a |
8116 | DW_AT_name. */ | |
f792889a | 8117 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8118 | break; |
c906108c | 8119 | case DW_TAG_common_block: |
e7c27a73 | 8120 | read_common_block (die, cu); |
c906108c SS |
8121 | break; |
8122 | case DW_TAG_common_inclusion: | |
8123 | break; | |
d9fa45fe | 8124 | case DW_TAG_namespace: |
4d4ec4e5 | 8125 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8126 | read_namespace (die, cu); |
d9fa45fe | 8127 | break; |
5d7cb8df | 8128 | case DW_TAG_module: |
4d4ec4e5 | 8129 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8130 | read_module (die, cu); |
8131 | break; | |
d9fa45fe | 8132 | case DW_TAG_imported_declaration: |
74921315 KS |
8133 | cu->processing_has_namespace_info = 1; |
8134 | if (read_namespace_alias (die, cu)) | |
8135 | break; | |
8136 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8137 | case DW_TAG_imported_module: |
4d4ec4e5 | 8138 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8139 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8140 | || cu->language != language_fortran)) | |
8141 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8142 | dwarf_tag_name (die->tag)); | |
8143 | read_import_statement (die, cu); | |
d9fa45fe | 8144 | break; |
95554aad TT |
8145 | |
8146 | case DW_TAG_imported_unit: | |
8147 | process_imported_unit_die (die, cu); | |
8148 | break; | |
8149 | ||
c906108c | 8150 | default: |
e7c27a73 | 8151 | new_symbol (die, NULL, cu); |
c906108c SS |
8152 | break; |
8153 | } | |
adde2bff DE |
8154 | |
8155 | do_cleanups (in_process); | |
c906108c | 8156 | } |
ca69b9e6 DE |
8157 | \f |
8158 | /* DWARF name computation. */ | |
c906108c | 8159 | |
94af9270 KS |
8160 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8161 | needs to have the name of the scope prepended to the name listed in the | |
8162 | die. */ | |
8163 | ||
8164 | static int | |
8165 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8166 | { | |
1c809c68 TT |
8167 | struct attribute *attr; |
8168 | ||
94af9270 KS |
8169 | switch (die->tag) |
8170 | { | |
8171 | case DW_TAG_namespace: | |
8172 | case DW_TAG_typedef: | |
8173 | case DW_TAG_class_type: | |
8174 | case DW_TAG_interface_type: | |
8175 | case DW_TAG_structure_type: | |
8176 | case DW_TAG_union_type: | |
8177 | case DW_TAG_enumeration_type: | |
8178 | case DW_TAG_enumerator: | |
8179 | case DW_TAG_subprogram: | |
8180 | case DW_TAG_member: | |
74921315 | 8181 | case DW_TAG_imported_declaration: |
94af9270 KS |
8182 | return 1; |
8183 | ||
8184 | case DW_TAG_variable: | |
c2b0a229 | 8185 | case DW_TAG_constant: |
94af9270 KS |
8186 | /* We only need to prefix "globally" visible variables. These include |
8187 | any variable marked with DW_AT_external or any variable that | |
8188 | lives in a namespace. [Variables in anonymous namespaces | |
8189 | require prefixing, but they are not DW_AT_external.] */ | |
8190 | ||
8191 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8192 | { | |
8193 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8194 | |
94af9270 KS |
8195 | return die_needs_namespace (die_specification (die, &spec_cu), |
8196 | spec_cu); | |
8197 | } | |
8198 | ||
1c809c68 | 8199 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8200 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8201 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8202 | return 0; |
8203 | /* A variable in a lexical block of some kind does not need a | |
8204 | namespace, even though in C++ such variables may be external | |
8205 | and have a mangled name. */ | |
8206 | if (die->parent->tag == DW_TAG_lexical_block | |
8207 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8208 | || die->parent->tag == DW_TAG_catch_block |
8209 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8210 | return 0; |
8211 | return 1; | |
94af9270 KS |
8212 | |
8213 | default: | |
8214 | return 0; | |
8215 | } | |
8216 | } | |
8217 | ||
98bfdba5 PA |
8218 | /* Retrieve the last character from a mem_file. */ |
8219 | ||
8220 | static void | |
8221 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
8222 | { | |
8223 | char *last_char_p = (char *) object; | |
8224 | ||
8225 | if (length > 0) | |
8226 | *last_char_p = buffer[length - 1]; | |
8227 | } | |
8228 | ||
94af9270 | 8229 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
8230 | compute the physname for the object, which include a method's: |
8231 | - formal parameters (C++/Java), | |
8232 | - receiver type (Go), | |
8233 | - return type (Java). | |
8234 | ||
8235 | The term "physname" is a bit confusing. | |
8236 | For C++, for example, it is the demangled name. | |
8237 | For Go, for example, it's the mangled name. | |
94af9270 | 8238 | |
af6b7be1 JB |
8239 | For Ada, return the DIE's linkage name rather than the fully qualified |
8240 | name. PHYSNAME is ignored.. | |
8241 | ||
94af9270 KS |
8242 | The result is allocated on the objfile_obstack and canonicalized. */ |
8243 | ||
8244 | static const char * | |
15d034d0 TT |
8245 | dwarf2_compute_name (const char *name, |
8246 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8247 | int physname) |
8248 | { | |
bb5ed363 DE |
8249 | struct objfile *objfile = cu->objfile; |
8250 | ||
94af9270 KS |
8251 | if (name == NULL) |
8252 | name = dwarf2_name (die, cu); | |
8253 | ||
f55ee35c JK |
8254 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
8255 | compute it by typename_concat inside GDB. */ | |
8256 | if (cu->language == language_ada | |
8257 | || (cu->language == language_fortran && physname)) | |
8258 | { | |
8259 | /* For Ada unit, we prefer the linkage name over the name, as | |
8260 | the former contains the exported name, which the user expects | |
8261 | to be able to reference. Ideally, we want the user to be able | |
8262 | to reference this entity using either natural or linkage name, | |
8263 | but we haven't started looking at this enhancement yet. */ | |
8264 | struct attribute *attr; | |
8265 | ||
8266 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8267 | if (attr == NULL) | |
8268 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8269 | if (attr && DW_STRING (attr)) | |
8270 | return DW_STRING (attr); | |
8271 | } | |
8272 | ||
94af9270 KS |
8273 | /* These are the only languages we know how to qualify names in. */ |
8274 | if (name != NULL | |
f55ee35c JK |
8275 | && (cu->language == language_cplus || cu->language == language_java |
8276 | || cu->language == language_fortran)) | |
94af9270 KS |
8277 | { |
8278 | if (die_needs_namespace (die, cu)) | |
8279 | { | |
8280 | long length; | |
0d5cff50 | 8281 | const char *prefix; |
94af9270 KS |
8282 | struct ui_file *buf; |
8283 | ||
8284 | prefix = determine_prefix (die, cu); | |
8285 | buf = mem_fileopen (); | |
8286 | if (*prefix != '\0') | |
8287 | { | |
f55ee35c JK |
8288 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8289 | physname, cu); | |
9a619af0 | 8290 | |
94af9270 KS |
8291 | fputs_unfiltered (prefixed_name, buf); |
8292 | xfree (prefixed_name); | |
8293 | } | |
8294 | else | |
62d5b8da | 8295 | fputs_unfiltered (name, buf); |
94af9270 | 8296 | |
98bfdba5 PA |
8297 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8298 | as children with DW_TAG_template_type_param or | |
8299 | DW_TAG_value_type_param. If the latter, add them to the name | |
8300 | here. If the name already has template parameters, then | |
8301 | skip this step; some versions of GCC emit both, and | |
8302 | it is more efficient to use the pre-computed name. | |
8303 | ||
8304 | Something to keep in mind about this process: it is very | |
8305 | unlikely, or in some cases downright impossible, to produce | |
8306 | something that will match the mangled name of a function. | |
8307 | If the definition of the function has the same debug info, | |
8308 | we should be able to match up with it anyway. But fallbacks | |
8309 | using the minimal symbol, for instance to find a method | |
8310 | implemented in a stripped copy of libstdc++, will not work. | |
8311 | If we do not have debug info for the definition, we will have to | |
8312 | match them up some other way. | |
8313 | ||
8314 | When we do name matching there is a related problem with function | |
8315 | templates; two instantiated function templates are allowed to | |
8316 | differ only by their return types, which we do not add here. */ | |
8317 | ||
8318 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8319 | { | |
8320 | struct attribute *attr; | |
8321 | struct die_info *child; | |
8322 | int first = 1; | |
8323 | ||
8324 | die->building_fullname = 1; | |
8325 | ||
8326 | for (child = die->child; child != NULL; child = child->sibling) | |
8327 | { | |
8328 | struct type *type; | |
12df843f | 8329 | LONGEST value; |
d521ce57 | 8330 | const gdb_byte *bytes; |
98bfdba5 PA |
8331 | struct dwarf2_locexpr_baton *baton; |
8332 | struct value *v; | |
8333 | ||
8334 | if (child->tag != DW_TAG_template_type_param | |
8335 | && child->tag != DW_TAG_template_value_param) | |
8336 | continue; | |
8337 | ||
8338 | if (first) | |
8339 | { | |
8340 | fputs_unfiltered ("<", buf); | |
8341 | first = 0; | |
8342 | } | |
8343 | else | |
8344 | fputs_unfiltered (", ", buf); | |
8345 | ||
8346 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8347 | if (attr == NULL) | |
8348 | { | |
8349 | complaint (&symfile_complaints, | |
8350 | _("template parameter missing DW_AT_type")); | |
8351 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8352 | continue; | |
8353 | } | |
8354 | type = die_type (child, cu); | |
8355 | ||
8356 | if (child->tag == DW_TAG_template_type_param) | |
8357 | { | |
79d43c61 | 8358 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8359 | continue; |
8360 | } | |
8361 | ||
8362 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8363 | if (attr == NULL) | |
8364 | { | |
8365 | complaint (&symfile_complaints, | |
3e43a32a MS |
8366 | _("template parameter missing " |
8367 | "DW_AT_const_value")); | |
98bfdba5 PA |
8368 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8369 | continue; | |
8370 | } | |
8371 | ||
8372 | dwarf2_const_value_attr (attr, type, name, | |
8373 | &cu->comp_unit_obstack, cu, | |
8374 | &value, &bytes, &baton); | |
8375 | ||
8376 | if (TYPE_NOSIGN (type)) | |
8377 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8378 | changed, this can use value_print instead. */ | |
8379 | c_printchar (value, type, buf); | |
8380 | else | |
8381 | { | |
8382 | struct value_print_options opts; | |
8383 | ||
8384 | if (baton != NULL) | |
8385 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8386 | baton->data, | |
8387 | baton->size, | |
8388 | baton->per_cu); | |
8389 | else if (bytes != NULL) | |
8390 | { | |
8391 | v = allocate_value (type); | |
8392 | memcpy (value_contents_writeable (v), bytes, | |
8393 | TYPE_LENGTH (type)); | |
8394 | } | |
8395 | else | |
8396 | v = value_from_longest (type, value); | |
8397 | ||
3e43a32a MS |
8398 | /* Specify decimal so that we do not depend on |
8399 | the radix. */ | |
98bfdba5 PA |
8400 | get_formatted_print_options (&opts, 'd'); |
8401 | opts.raw = 1; | |
8402 | value_print (v, buf, &opts); | |
8403 | release_value (v); | |
8404 | value_free (v); | |
8405 | } | |
8406 | } | |
8407 | ||
8408 | die->building_fullname = 0; | |
8409 | ||
8410 | if (!first) | |
8411 | { | |
8412 | /* Close the argument list, with a space if necessary | |
8413 | (nested templates). */ | |
8414 | char last_char = '\0'; | |
8415 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8416 | if (last_char == '>') | |
8417 | fputs_unfiltered (" >", buf); | |
8418 | else | |
8419 | fputs_unfiltered (">", buf); | |
8420 | } | |
8421 | } | |
8422 | ||
94af9270 KS |
8423 | /* For Java and C++ methods, append formal parameter type |
8424 | information, if PHYSNAME. */ | |
6e70227d | 8425 | |
94af9270 KS |
8426 | if (physname && die->tag == DW_TAG_subprogram |
8427 | && (cu->language == language_cplus | |
8428 | || cu->language == language_java)) | |
8429 | { | |
8430 | struct type *type = read_type_die (die, cu); | |
8431 | ||
79d43c61 TT |
8432 | c_type_print_args (type, buf, 1, cu->language, |
8433 | &type_print_raw_options); | |
94af9270 KS |
8434 | |
8435 | if (cu->language == language_java) | |
8436 | { | |
8437 | /* For java, we must append the return type to method | |
0963b4bd | 8438 | names. */ |
94af9270 KS |
8439 | if (die->tag == DW_TAG_subprogram) |
8440 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 8441 | 0, 0, &type_print_raw_options); |
94af9270 KS |
8442 | } |
8443 | else if (cu->language == language_cplus) | |
8444 | { | |
60430eff DJ |
8445 | /* Assume that an artificial first parameter is |
8446 | "this", but do not crash if it is not. RealView | |
8447 | marks unnamed (and thus unused) parameters as | |
8448 | artificial; there is no way to differentiate | |
8449 | the two cases. */ | |
94af9270 KS |
8450 | if (TYPE_NFIELDS (type) > 0 |
8451 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8452 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8453 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8454 | 0)))) | |
94af9270 KS |
8455 | fputs_unfiltered (" const", buf); |
8456 | } | |
8457 | } | |
8458 | ||
bb5ed363 | 8459 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
8460 | &length); |
8461 | ui_file_delete (buf); | |
8462 | ||
8463 | if (cu->language == language_cplus) | |
8464 | { | |
15d034d0 | 8465 | const char *cname |
94af9270 | 8466 | = dwarf2_canonicalize_name (name, cu, |
bb5ed363 | 8467 | &objfile->objfile_obstack); |
9a619af0 | 8468 | |
94af9270 KS |
8469 | if (cname != NULL) |
8470 | name = cname; | |
8471 | } | |
8472 | } | |
8473 | } | |
8474 | ||
8475 | return name; | |
8476 | } | |
8477 | ||
0114d602 DJ |
8478 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8479 | If scope qualifiers are appropriate they will be added. The result | |
8480 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
8481 | not have a name. NAME may either be from a previous call to |
8482 | dwarf2_name or NULL. | |
8483 | ||
0963b4bd | 8484 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
8485 | |
8486 | static const char * | |
15d034d0 | 8487 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8488 | { |
94af9270 KS |
8489 | return dwarf2_compute_name (name, die, cu, 0); |
8490 | } | |
0114d602 | 8491 | |
94af9270 KS |
8492 | /* Construct a physname for the given DIE in CU. NAME may either be |
8493 | from a previous call to dwarf2_name or NULL. The result will be | |
8494 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8495 | name. | |
0114d602 | 8496 | |
94af9270 | 8497 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 8498 | |
94af9270 | 8499 | static const char * |
15d034d0 | 8500 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8501 | { |
bb5ed363 | 8502 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8503 | struct attribute *attr; |
8504 | const char *retval, *mangled = NULL, *canon = NULL; | |
8505 | struct cleanup *back_to; | |
8506 | int need_copy = 1; | |
8507 | ||
8508 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8509 | on its own. */ | |
8510 | if (!die_needs_namespace (die, cu)) | |
8511 | return dwarf2_compute_name (name, die, cu, 1); | |
8512 | ||
8513 | back_to = make_cleanup (null_cleanup, NULL); | |
8514 | ||
8515 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8516 | if (!attr) | |
8517 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8518 | ||
8519 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
8520 | has computed. */ | |
8521 | if (attr && DW_STRING (attr)) | |
8522 | { | |
8523 | char *demangled; | |
8524 | ||
8525 | mangled = DW_STRING (attr); | |
8526 | ||
8527 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
8528 | type. It is easier for GDB users to search for such functions as | |
8529 | `name(params)' than `long name(params)'. In such case the minimal | |
8530 | symbol names do not match the full symbol names but for template | |
8531 | functions there is never a need to look up their definition from their | |
8532 | declaration so the only disadvantage remains the minimal symbol | |
8533 | variant `long name(params)' does not have the proper inferior type. | |
8534 | */ | |
8535 | ||
a766d390 DE |
8536 | if (cu->language == language_go) |
8537 | { | |
8538 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8539 | new_symbol_full assumes we return the mangled name. | |
8540 | This just undoes that lie until things are cleaned up. */ | |
8541 | demangled = NULL; | |
8542 | } | |
8543 | else | |
8544 | { | |
8de20a37 TT |
8545 | demangled = gdb_demangle (mangled, |
8546 | (DMGL_PARAMS | DMGL_ANSI | |
8547 | | (cu->language == language_java | |
8548 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
8549 | : DMGL_RET_DROP))); | |
a766d390 | 8550 | } |
900e11f9 JK |
8551 | if (demangled) |
8552 | { | |
8553 | make_cleanup (xfree, demangled); | |
8554 | canon = demangled; | |
8555 | } | |
8556 | else | |
8557 | { | |
8558 | canon = mangled; | |
8559 | need_copy = 0; | |
8560 | } | |
8561 | } | |
8562 | ||
8563 | if (canon == NULL || check_physname) | |
8564 | { | |
8565 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8566 | ||
8567 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8568 | { | |
8569 | /* It may not mean a bug in GDB. The compiler could also | |
8570 | compute DW_AT_linkage_name incorrectly. But in such case | |
8571 | GDB would need to be bug-to-bug compatible. */ | |
8572 | ||
8573 | complaint (&symfile_complaints, | |
8574 | _("Computed physname <%s> does not match demangled <%s> " | |
8575 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8576 | physname, canon, mangled, die->offset.sect_off, |
8577 | objfile_name (objfile)); | |
900e11f9 JK |
8578 | |
8579 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8580 | is available here - over computed PHYSNAME. It is safer | |
8581 | against both buggy GDB and buggy compilers. */ | |
8582 | ||
8583 | retval = canon; | |
8584 | } | |
8585 | else | |
8586 | { | |
8587 | retval = physname; | |
8588 | need_copy = 0; | |
8589 | } | |
8590 | } | |
8591 | else | |
8592 | retval = canon; | |
8593 | ||
8594 | if (need_copy) | |
10f0c4bb | 8595 | retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval)); |
900e11f9 JK |
8596 | |
8597 | do_cleanups (back_to); | |
8598 | return retval; | |
0114d602 DJ |
8599 | } |
8600 | ||
74921315 KS |
8601 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
8602 | a new symbol for it. | |
8603 | ||
8604 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
8605 | ||
8606 | static int | |
8607 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
8608 | { | |
8609 | struct attribute *attr; | |
8610 | ||
8611 | /* If the die does not have a name, this is not a namespace | |
8612 | alias. */ | |
8613 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8614 | if (attr != NULL) | |
8615 | { | |
8616 | int num; | |
8617 | struct die_info *d = die; | |
8618 | struct dwarf2_cu *imported_cu = cu; | |
8619 | ||
8620 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
8621 | keep inspecting DIEs until we hit the underlying import. */ | |
8622 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
8623 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
8624 | { | |
8625 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
8626 | if (attr == NULL) | |
8627 | break; | |
8628 | ||
8629 | d = follow_die_ref (d, attr, &imported_cu); | |
8630 | if (d->tag != DW_TAG_imported_declaration) | |
8631 | break; | |
8632 | } | |
8633 | ||
8634 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
8635 | { | |
8636 | complaint (&symfile_complaints, | |
8637 | _("DIE at 0x%x has too many recursively imported " | |
8638 | "declarations"), d->offset.sect_off); | |
8639 | return 0; | |
8640 | } | |
8641 | ||
8642 | if (attr != NULL) | |
8643 | { | |
8644 | struct type *type; | |
8645 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
8646 | ||
8647 | type = get_die_type_at_offset (offset, cu->per_cu); | |
8648 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
8649 | { | |
8650 | /* This declaration is a global namespace alias. Add | |
8651 | a symbol for it whose type is the aliased namespace. */ | |
8652 | new_symbol (die, type, cu); | |
8653 | return 1; | |
8654 | } | |
8655 | } | |
8656 | } | |
8657 | ||
8658 | return 0; | |
8659 | } | |
8660 | ||
27aa8d6a SW |
8661 | /* Read the import statement specified by the given die and record it. */ |
8662 | ||
8663 | static void | |
8664 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8665 | { | |
bb5ed363 | 8666 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8667 | struct attribute *import_attr; |
32019081 | 8668 | struct die_info *imported_die, *child_die; |
de4affc9 | 8669 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8670 | const char *imported_name; |
794684b6 | 8671 | const char *imported_name_prefix; |
13387711 SW |
8672 | const char *canonical_name; |
8673 | const char *import_alias; | |
8674 | const char *imported_declaration = NULL; | |
794684b6 | 8675 | const char *import_prefix; |
32019081 JK |
8676 | VEC (const_char_ptr) *excludes = NULL; |
8677 | struct cleanup *cleanups; | |
13387711 | 8678 | |
27aa8d6a SW |
8679 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8680 | if (import_attr == NULL) | |
8681 | { | |
8682 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8683 | dwarf_tag_name (die->tag)); | |
8684 | return; | |
8685 | } | |
8686 | ||
de4affc9 CC |
8687 | imported_cu = cu; |
8688 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8689 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8690 | if (imported_name == NULL) |
8691 | { | |
8692 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8693 | ||
8694 | The import in the following code: | |
8695 | namespace A | |
8696 | { | |
8697 | typedef int B; | |
8698 | } | |
8699 | ||
8700 | int main () | |
8701 | { | |
8702 | using A::B; | |
8703 | B b; | |
8704 | return b; | |
8705 | } | |
8706 | ||
8707 | ... | |
8708 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8709 | <52> DW_AT_decl_file : 1 | |
8710 | <53> DW_AT_decl_line : 6 | |
8711 | <54> DW_AT_import : <0x75> | |
8712 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8713 | <59> DW_AT_name : B | |
8714 | <5b> DW_AT_decl_file : 1 | |
8715 | <5c> DW_AT_decl_line : 2 | |
8716 | <5d> DW_AT_type : <0x6e> | |
8717 | ... | |
8718 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8719 | <76> DW_AT_byte_size : 4 | |
8720 | <77> DW_AT_encoding : 5 (signed) | |
8721 | ||
8722 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8723 | This case will be ignored until the gcc bug is fixed. */ | |
8724 | return; | |
8725 | } | |
8726 | ||
82856980 SW |
8727 | /* Figure out the local name after import. */ |
8728 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8729 | |
794684b6 SW |
8730 | /* Figure out where the statement is being imported to. */ |
8731 | import_prefix = determine_prefix (die, cu); | |
8732 | ||
8733 | /* Figure out what the scope of the imported die is and prepend it | |
8734 | to the name of the imported die. */ | |
de4affc9 | 8735 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8736 | |
f55ee35c JK |
8737 | if (imported_die->tag != DW_TAG_namespace |
8738 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8739 | { |
13387711 SW |
8740 | imported_declaration = imported_name; |
8741 | canonical_name = imported_name_prefix; | |
794684b6 | 8742 | } |
13387711 | 8743 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 TT |
8744 | canonical_name = obconcat (&objfile->objfile_obstack, |
8745 | imported_name_prefix, "::", imported_name, | |
8746 | (char *) NULL); | |
13387711 SW |
8747 | else |
8748 | canonical_name = imported_name; | |
794684b6 | 8749 | |
32019081 JK |
8750 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8751 | ||
8752 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8753 | for (child_die = die->child; child_die && child_die->tag; | |
8754 | child_die = sibling_die (child_die)) | |
8755 | { | |
8756 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8757 | represented by an imported module entry with an import attribute | |
8758 | referring to the module and owned entries corresponding to those | |
8759 | entities that are renamed as part of being imported. */ | |
8760 | ||
8761 | if (child_die->tag != DW_TAG_imported_declaration) | |
8762 | { | |
8763 | complaint (&symfile_complaints, | |
8764 | _("child DW_TAG_imported_declaration expected " | |
8765 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 8766 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8767 | continue; |
8768 | } | |
8769 | ||
8770 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
8771 | if (import_attr == NULL) | |
8772 | { | |
8773 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8774 | dwarf_tag_name (child_die->tag)); | |
8775 | continue; | |
8776 | } | |
8777 | ||
8778 | imported_cu = cu; | |
8779 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
8780 | &imported_cu); | |
8781 | imported_name = dwarf2_name (imported_die, imported_cu); | |
8782 | if (imported_name == NULL) | |
8783 | { | |
8784 | complaint (&symfile_complaints, | |
8785 | _("child DW_TAG_imported_declaration has unknown " | |
8786 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 8787 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8788 | continue; |
8789 | } | |
8790 | ||
8791 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
8792 | ||
8793 | process_die (child_die, cu); | |
8794 | } | |
8795 | ||
c0cc3a76 SW |
8796 | cp_add_using_directive (import_prefix, |
8797 | canonical_name, | |
8798 | import_alias, | |
13387711 | 8799 | imported_declaration, |
32019081 | 8800 | excludes, |
12aaed36 | 8801 | 0, |
bb5ed363 | 8802 | &objfile->objfile_obstack); |
32019081 JK |
8803 | |
8804 | do_cleanups (cleanups); | |
27aa8d6a SW |
8805 | } |
8806 | ||
f4dc4d17 | 8807 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 8808 | |
cb1df416 DJ |
8809 | static void |
8810 | free_cu_line_header (void *arg) | |
8811 | { | |
8812 | struct dwarf2_cu *cu = arg; | |
8813 | ||
8814 | free_line_header (cu->line_header); | |
8815 | cu->line_header = NULL; | |
8816 | } | |
8817 | ||
1b80a9fa JK |
8818 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
8819 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
8820 | this, it was first present in GCC release 4.3.0. */ | |
8821 | ||
8822 | static int | |
8823 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
8824 | { | |
8825 | if (!cu->checked_producer) | |
8826 | check_producer (cu); | |
8827 | ||
8828 | return cu->producer_is_gcc_lt_4_3; | |
8829 | } | |
8830 | ||
9291a0cd TT |
8831 | static void |
8832 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 8833 | const char **name, const char **comp_dir) |
9291a0cd TT |
8834 | { |
8835 | struct attribute *attr; | |
8836 | ||
8837 | *name = NULL; | |
8838 | *comp_dir = NULL; | |
8839 | ||
8840 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
8841 | is not a source language identifier. */ | |
8842 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8843 | if (attr) | |
8844 | { | |
8845 | *name = DW_STRING (attr); | |
8846 | } | |
8847 | ||
8848 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
8849 | if (attr) | |
8850 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
8851 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
8852 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 8853 | { |
15d034d0 TT |
8854 | char *d = ldirname (*name); |
8855 | ||
8856 | *comp_dir = d; | |
8857 | if (d != NULL) | |
8858 | make_cleanup (xfree, d); | |
9291a0cd TT |
8859 | } |
8860 | if (*comp_dir != NULL) | |
8861 | { | |
8862 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
8863 | directory, get rid of it. */ | |
8864 | char *cp = strchr (*comp_dir, ':'); | |
8865 | ||
8866 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
8867 | *comp_dir = cp + 1; | |
8868 | } | |
8869 | ||
8870 | if (*name == NULL) | |
8871 | *name = "<unknown>"; | |
8872 | } | |
8873 | ||
f4dc4d17 DE |
8874 | /* Handle DW_AT_stmt_list for a compilation unit. |
8875 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
8876 | COMP_DIR is the compilation directory. |
8877 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
8878 | |
8879 | static void | |
8880 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
b385a60d | 8881 | const char *comp_dir) /* ARI: editCase function */ |
2ab95328 TT |
8882 | { |
8883 | struct attribute *attr; | |
2ab95328 | 8884 | |
f4dc4d17 DE |
8885 | gdb_assert (! cu->per_cu->is_debug_types); |
8886 | ||
2ab95328 TT |
8887 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
8888 | if (attr) | |
8889 | { | |
8890 | unsigned int line_offset = DW_UNSND (attr); | |
8891 | struct line_header *line_header | |
3019eac3 | 8892 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
8893 | |
8894 | if (line_header) | |
dee91e82 DE |
8895 | { |
8896 | cu->line_header = line_header; | |
8897 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 8898 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 8899 | } |
2ab95328 TT |
8900 | } |
8901 | } | |
8902 | ||
95554aad | 8903 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 8904 | |
c906108c | 8905 | static void |
e7c27a73 | 8906 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8907 | { |
dee91e82 | 8908 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 8909 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 8910 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
8911 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
8912 | struct attribute *attr; | |
15d034d0 TT |
8913 | const char *name = NULL; |
8914 | const char *comp_dir = NULL; | |
c906108c SS |
8915 | struct die_info *child_die; |
8916 | bfd *abfd = objfile->obfd; | |
e142c38c | 8917 | CORE_ADDR baseaddr; |
6e70227d | 8918 | |
e142c38c | 8919 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 8920 | |
fae299cd | 8921 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
8922 | |
8923 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
8924 | from finish_block. */ | |
2acceee2 | 8925 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
8926 | lowpc = highpc; |
8927 | lowpc += baseaddr; | |
8928 | highpc += baseaddr; | |
8929 | ||
9291a0cd | 8930 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 8931 | |
95554aad | 8932 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 8933 | |
f4b8a18d KW |
8934 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
8935 | standardised yet. As a workaround for the language detection we fall | |
8936 | back to the DW_AT_producer string. */ | |
8937 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
8938 | cu->language = language_opencl; | |
8939 | ||
3019eac3 DE |
8940 | /* Similar hack for Go. */ |
8941 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
8942 | set_cu_language (DW_LANG_Go, cu); | |
8943 | ||
f4dc4d17 | 8944 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
8945 | |
8946 | /* Decode line number information if present. We do this before | |
8947 | processing child DIEs, so that the line header table is available | |
8948 | for DW_AT_decl_file. */ | |
f4dc4d17 | 8949 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
8950 | |
8951 | /* Process all dies in compilation unit. */ | |
8952 | if (die->child != NULL) | |
8953 | { | |
8954 | child_die = die->child; | |
8955 | while (child_die && child_die->tag) | |
8956 | { | |
8957 | process_die (child_die, cu); | |
8958 | child_die = sibling_die (child_die); | |
8959 | } | |
8960 | } | |
8961 | ||
8962 | /* Decode macro information, if present. Dwarf 2 macro information | |
8963 | refers to information in the line number info statement program | |
8964 | header, so we can only read it if we've read the header | |
8965 | successfully. */ | |
8966 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
8967 | if (attr && cu->line_header) | |
8968 | { | |
8969 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
8970 | complaint (&symfile_complaints, | |
8971 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
8972 | ||
09262596 | 8973 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
8974 | } |
8975 | else | |
8976 | { | |
8977 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
8978 | if (attr && cu->line_header) | |
8979 | { | |
8980 | unsigned int macro_offset = DW_UNSND (attr); | |
8981 | ||
09262596 | 8982 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
8983 | } |
8984 | } | |
8985 | ||
8986 | do_cleanups (back_to); | |
8987 | } | |
8988 | ||
f4dc4d17 DE |
8989 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
8990 | Create the set of symtabs used by this TU, or if this TU is sharing | |
8991 | symtabs with another TU and the symtabs have already been created | |
8992 | then restore those symtabs in the line header. | |
8993 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
8994 | |
8995 | static void | |
f4dc4d17 | 8996 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 8997 | { |
f4dc4d17 DE |
8998 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8999 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
9000 | struct type_unit_group *tu_group; | |
9001 | int first_time; | |
9002 | struct line_header *lh; | |
3019eac3 | 9003 | struct attribute *attr; |
f4dc4d17 | 9004 | unsigned int i, line_offset; |
0186c6a7 | 9005 | struct signatured_type *sig_type; |
3019eac3 | 9006 | |
f4dc4d17 | 9007 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9008 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9009 | |
f4dc4d17 | 9010 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9011 | |
f4dc4d17 | 9012 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9013 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9014 | if (sig_type->type_unit_group == NULL) |
9015 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9016 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9017 | |
9018 | /* If we've already processed this stmt_list there's no real need to | |
9019 | do it again, we could fake it and just recreate the part we need | |
9020 | (file name,index -> symtab mapping). If data shows this optimization | |
9021 | is useful we can do it then. */ | |
9022 | first_time = tu_group->primary_symtab == NULL; | |
9023 | ||
9024 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9025 | debug info. */ | |
9026 | lh = NULL; | |
9027 | if (attr != NULL) | |
3019eac3 | 9028 | { |
f4dc4d17 DE |
9029 | line_offset = DW_UNSND (attr); |
9030 | lh = dwarf_decode_line_header (line_offset, cu); | |
9031 | } | |
9032 | if (lh == NULL) | |
9033 | { | |
9034 | if (first_time) | |
9035 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9036 | else | |
9037 | { | |
9038 | gdb_assert (tu_group->symtabs == NULL); | |
9039 | restart_symtab (0); | |
9040 | } | |
9041 | /* Note: The primary symtab will get allocated at the end. */ | |
9042 | return; | |
3019eac3 DE |
9043 | } |
9044 | ||
f4dc4d17 DE |
9045 | cu->line_header = lh; |
9046 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 9047 | |
f4dc4d17 DE |
9048 | if (first_time) |
9049 | { | |
9050 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 9051 | |
f4dc4d17 DE |
9052 | tu_group->num_symtabs = lh->num_file_names; |
9053 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 9054 | |
f4dc4d17 DE |
9055 | for (i = 0; i < lh->num_file_names; ++i) |
9056 | { | |
d521ce57 | 9057 | const char *dir = NULL; |
f4dc4d17 | 9058 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 9059 | |
f4dc4d17 DE |
9060 | if (fe->dir_index) |
9061 | dir = lh->include_dirs[fe->dir_index - 1]; | |
9062 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 9063 | |
f4dc4d17 DE |
9064 | /* Note: We don't have to watch for the main subfile here, type units |
9065 | don't have DW_AT_name. */ | |
3019eac3 | 9066 | |
f4dc4d17 DE |
9067 | if (current_subfile->symtab == NULL) |
9068 | { | |
9069 | /* NOTE: start_subfile will recognize when it's been passed | |
9070 | a file it has already seen. So we can't assume there's a | |
9071 | simple mapping from lh->file_names to subfiles, | |
9072 | lh->file_names may contain dups. */ | |
9073 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
9074 | objfile); | |
9075 | } | |
9076 | ||
9077 | fe->symtab = current_subfile->symtab; | |
9078 | tu_group->symtabs[i] = fe->symtab; | |
9079 | } | |
9080 | } | |
9081 | else | |
3019eac3 | 9082 | { |
f4dc4d17 DE |
9083 | restart_symtab (0); |
9084 | ||
9085 | for (i = 0; i < lh->num_file_names; ++i) | |
9086 | { | |
9087 | struct file_entry *fe = &lh->file_names[i]; | |
9088 | ||
9089 | fe->symtab = tu_group->symtabs[i]; | |
9090 | } | |
3019eac3 DE |
9091 | } |
9092 | ||
f4dc4d17 DE |
9093 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9094 | so they don't have a "real" (so to speak) symtab anyway. | |
9095 | There is later code that will assign the main symtab to all symbols | |
9096 | that don't have one. We need to handle the case of a symbol with a | |
9097 | missing symtab (DW_AT_decl_file) anyway. */ | |
9098 | } | |
3019eac3 | 9099 | |
f4dc4d17 DE |
9100 | /* Process DW_TAG_type_unit. |
9101 | For TUs we want to skip the first top level sibling if it's not the | |
9102 | actual type being defined by this TU. In this case the first top | |
9103 | level sibling is there to provide context only. */ | |
3019eac3 | 9104 | |
f4dc4d17 DE |
9105 | static void |
9106 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9107 | { | |
9108 | struct die_info *child_die; | |
3019eac3 | 9109 | |
f4dc4d17 DE |
9110 | prepare_one_comp_unit (cu, die, language_minimal); |
9111 | ||
9112 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9113 | We do this before processing child DIEs, so that the line header table | |
9114 | is available for DW_AT_decl_file. */ | |
9115 | setup_type_unit_groups (die, cu); | |
9116 | ||
9117 | if (die->child != NULL) | |
9118 | { | |
9119 | child_die = die->child; | |
9120 | while (child_die && child_die->tag) | |
9121 | { | |
9122 | process_die (child_die, cu); | |
9123 | child_die = sibling_die (child_die); | |
9124 | } | |
9125 | } | |
3019eac3 DE |
9126 | } |
9127 | \f | |
80626a55 DE |
9128 | /* DWO/DWP files. |
9129 | ||
9130 | http://gcc.gnu.org/wiki/DebugFission | |
9131 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9132 | ||
9133 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9134 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9135 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9136 | |
9137 | static hashval_t | |
9138 | hash_dwo_file (const void *item) | |
9139 | { | |
9140 | const struct dwo_file *dwo_file = item; | |
a2ce51a0 | 9141 | hashval_t hash; |
3019eac3 | 9142 | |
a2ce51a0 DE |
9143 | hash = htab_hash_string (dwo_file->dwo_name); |
9144 | if (dwo_file->comp_dir != NULL) | |
9145 | hash += htab_hash_string (dwo_file->comp_dir); | |
9146 | return hash; | |
3019eac3 DE |
9147 | } |
9148 | ||
9149 | static int | |
9150 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9151 | { | |
9152 | const struct dwo_file *lhs = item_lhs; | |
9153 | const struct dwo_file *rhs = item_rhs; | |
9154 | ||
a2ce51a0 DE |
9155 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9156 | return 0; | |
9157 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9158 | return lhs->comp_dir == rhs->comp_dir; | |
9159 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9160 | } |
9161 | ||
9162 | /* Allocate a hash table for DWO files. */ | |
9163 | ||
9164 | static htab_t | |
9165 | allocate_dwo_file_hash_table (void) | |
9166 | { | |
9167 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9168 | ||
9169 | return htab_create_alloc_ex (41, | |
9170 | hash_dwo_file, | |
9171 | eq_dwo_file, | |
9172 | NULL, | |
9173 | &objfile->objfile_obstack, | |
9174 | hashtab_obstack_allocate, | |
9175 | dummy_obstack_deallocate); | |
9176 | } | |
9177 | ||
80626a55 DE |
9178 | /* Lookup DWO file DWO_NAME. */ |
9179 | ||
9180 | static void ** | |
0ac5b59e | 9181 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9182 | { |
9183 | struct dwo_file find_entry; | |
9184 | void **slot; | |
9185 | ||
9186 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9187 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9188 | ||
9189 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9190 | find_entry.dwo_name = dwo_name; |
9191 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9192 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9193 | ||
9194 | return slot; | |
9195 | } | |
9196 | ||
3019eac3 DE |
9197 | static hashval_t |
9198 | hash_dwo_unit (const void *item) | |
9199 | { | |
9200 | const struct dwo_unit *dwo_unit = item; | |
9201 | ||
9202 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9203 | return dwo_unit->signature; | |
9204 | } | |
9205 | ||
9206 | static int | |
9207 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9208 | { | |
9209 | const struct dwo_unit *lhs = item_lhs; | |
9210 | const struct dwo_unit *rhs = item_rhs; | |
9211 | ||
9212 | /* The signature is assumed to be unique within the DWO file. | |
9213 | So while object file CU dwo_id's always have the value zero, | |
9214 | that's OK, assuming each object file DWO file has only one CU, | |
9215 | and that's the rule for now. */ | |
9216 | return lhs->signature == rhs->signature; | |
9217 | } | |
9218 | ||
9219 | /* Allocate a hash table for DWO CUs,TUs. | |
9220 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9221 | ||
9222 | static htab_t | |
9223 | allocate_dwo_unit_table (struct objfile *objfile) | |
9224 | { | |
9225 | /* Start out with a pretty small number. | |
9226 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9227 | return htab_create_alloc_ex (3, | |
9228 | hash_dwo_unit, | |
9229 | eq_dwo_unit, | |
9230 | NULL, | |
9231 | &objfile->objfile_obstack, | |
9232 | hashtab_obstack_allocate, | |
9233 | dummy_obstack_deallocate); | |
9234 | } | |
9235 | ||
80626a55 | 9236 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9237 | |
19c3d4c9 | 9238 | struct create_dwo_cu_data |
3019eac3 DE |
9239 | { |
9240 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9241 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9242 | }; |
9243 | ||
19c3d4c9 | 9244 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9245 | |
9246 | static void | |
19c3d4c9 DE |
9247 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9248 | const gdb_byte *info_ptr, | |
9249 | struct die_info *comp_unit_die, | |
9250 | int has_children, | |
9251 | void *datap) | |
3019eac3 DE |
9252 | { |
9253 | struct dwarf2_cu *cu = reader->cu; | |
9254 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9255 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 9256 | struct dwarf2_section_info *section = cu->per_cu->section; |
19c3d4c9 | 9257 | struct create_dwo_cu_data *data = datap; |
3019eac3 | 9258 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9259 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9260 | struct attribute *attr; |
3019eac3 DE |
9261 | |
9262 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9263 | if (attr == NULL) | |
9264 | { | |
19c3d4c9 DE |
9265 | complaint (&symfile_complaints, |
9266 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9267 | " its dwo_id [in module %s]"), | |
9268 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
9269 | return; |
9270 | } | |
9271 | ||
3019eac3 DE |
9272 | dwo_unit->dwo_file = dwo_file; |
9273 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9274 | dwo_unit->section = section; |
3019eac3 DE |
9275 | dwo_unit->offset = offset; |
9276 | dwo_unit->length = cu->per_cu->length; | |
9277 | ||
09406207 | 9278 | if (dwarf2_read_debug) |
4031ecc5 DE |
9279 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9280 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9281 | } |
9282 | ||
19c3d4c9 DE |
9283 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
9284 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 9285 | |
19c3d4c9 DE |
9286 | static struct dwo_unit * |
9287 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
9288 | { |
9289 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9290 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
9291 | bfd *abfd; | |
9292 | htab_t cu_htab; | |
d521ce57 | 9293 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
9294 | struct create_dwo_cu_data create_dwo_cu_data; |
9295 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
9296 | |
9297 | dwarf2_read_section (objfile, section); | |
9298 | info_ptr = section->buffer; | |
9299 | ||
9300 | if (info_ptr == NULL) | |
9301 | return NULL; | |
9302 | ||
9303 | /* We can't set abfd until now because the section may be empty or | |
9304 | not present, in which case section->asection will be NULL. */ | |
a32a8923 | 9305 | abfd = get_section_bfd_owner (section); |
3019eac3 | 9306 | |
09406207 | 9307 | if (dwarf2_read_debug) |
19c3d4c9 DE |
9308 | { |
9309 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
a32a8923 DE |
9310 | get_section_name (section), |
9311 | get_section_file_name (section)); | |
19c3d4c9 | 9312 | } |
3019eac3 | 9313 | |
19c3d4c9 DE |
9314 | create_dwo_cu_data.dwo_file = dwo_file; |
9315 | dwo_unit = NULL; | |
3019eac3 DE |
9316 | |
9317 | end_ptr = info_ptr + section->size; | |
9318 | while (info_ptr < end_ptr) | |
9319 | { | |
9320 | struct dwarf2_per_cu_data per_cu; | |
9321 | ||
19c3d4c9 DE |
9322 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9323 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9324 | memset (&per_cu, 0, sizeof (per_cu)); |
9325 | per_cu.objfile = objfile; | |
9326 | per_cu.is_debug_types = 0; | |
9327 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 9328 | per_cu.section = section; |
3019eac3 | 9329 | |
33e80786 | 9330 | init_cutu_and_read_dies_no_follow (&per_cu, dwo_file, |
19c3d4c9 DE |
9331 | create_dwo_cu_reader, |
9332 | &create_dwo_cu_data); | |
9333 | ||
9334 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
9335 | { | |
9336 | /* If we've already found one, complain. We only support one | |
9337 | because having more than one requires hacking the dwo_name of | |
9338 | each to match, which is highly unlikely to happen. */ | |
9339 | if (dwo_unit != NULL) | |
9340 | { | |
9341 | complaint (&symfile_complaints, | |
9342 | _("Multiple CUs in DWO file %s [in module %s]"), | |
4262abfb | 9343 | dwo_file->dwo_name, objfile_name (objfile)); |
19c3d4c9 DE |
9344 | break; |
9345 | } | |
9346 | ||
9347 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9348 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9349 | } | |
3019eac3 DE |
9350 | |
9351 | info_ptr += per_cu.length; | |
9352 | } | |
9353 | ||
19c3d4c9 | 9354 | return dwo_unit; |
3019eac3 DE |
9355 | } |
9356 | ||
80626a55 DE |
9357 | /* DWP file .debug_{cu,tu}_index section format: |
9358 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9359 | ||
d2415c6c DE |
9360 | DWP Version 1: |
9361 | ||
80626a55 DE |
9362 | Both index sections have the same format, and serve to map a 64-bit |
9363 | signature to a set of section numbers. Each section begins with a header, | |
9364 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9365 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9366 | aligned at 8-byte boundaries in the file. | |
9367 | ||
d2415c6c DE |
9368 | The index section header consists of: |
9369 | ||
9370 | V, 32 bit version number | |
9371 | -, 32 bits unused | |
9372 | N, 32 bit number of compilation units or type units in the index | |
9373 | M, 32 bit number of slots in the hash table | |
80626a55 | 9374 | |
d2415c6c | 9375 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9376 | |
d2415c6c DE |
9377 | The hash table begins at offset 16 in the section, and consists of an array |
9378 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9379 | order of the application binary). Unused slots in the hash table are 0. | |
9380 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9381 | |
d2415c6c DE |
9382 | The parallel table begins immediately after the hash table |
9383 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9384 | array of 32-bit indexes (using the byte order of the application binary), | |
9385 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9386 | table contains a 32-bit index into the pool of section numbers. For unused | |
9387 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9388 | |
73869dc2 DE |
9389 | The pool of section numbers begins immediately following the hash table |
9390 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9391 | section numbers consists of an array of 32-bit words (using the byte order | |
9392 | of the application binary). Each item in the array is indexed starting | |
9393 | from 0. The hash table entry provides the index of the first section | |
9394 | number in the set. Additional section numbers in the set follow, and the | |
9395 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9396 | ||
9397 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9398 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9399 | be the second entry. Other members of the set may follow in any order. | |
9400 | ||
9401 | --- | |
9402 | ||
9403 | DWP Version 2: | |
9404 | ||
9405 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9406 | and the entries in the index tables are now offsets into these sections. | |
9407 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9408 | section. | |
9409 | ||
9410 | Index Section Contents: | |
9411 | Header | |
9412 | Hash Table of Signatures dwp_hash_table.hash_table | |
9413 | Parallel Table of Indices dwp_hash_table.unit_table | |
9414 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
9415 | Table of Section Sizes dwp_hash_table.v2.sizes | |
9416 | ||
9417 | The index section header consists of: | |
9418 | ||
9419 | V, 32 bit version number | |
9420 | L, 32 bit number of columns in the table of section offsets | |
9421 | N, 32 bit number of compilation units or type units in the index | |
9422 | M, 32 bit number of slots in the hash table | |
9423 | ||
9424 | Numbers are recorded using the byte order of the application binary. | |
9425 | ||
9426 | The hash table has the same format as version 1. | |
9427 | The parallel table of indices has the same format as version 1, | |
9428 | except that the entries are origin-1 indices into the table of sections | |
9429 | offsets and the table of section sizes. | |
9430 | ||
9431 | The table of offsets begins immediately following the parallel table | |
9432 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
9433 | a two-dimensional array of 32-bit words (using the byte order of the | |
9434 | application binary), with L columns and N+1 rows, in row-major order. | |
9435 | Each row in the array is indexed starting from 0. The first row provides | |
9436 | a key to the remaining rows: each column in this row provides an identifier | |
9437 | for a debug section, and the offsets in the same column of subsequent rows | |
9438 | refer to that section. The section identifiers are: | |
9439 | ||
9440 | DW_SECT_INFO 1 .debug_info.dwo | |
9441 | DW_SECT_TYPES 2 .debug_types.dwo | |
9442 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
9443 | DW_SECT_LINE 4 .debug_line.dwo | |
9444 | DW_SECT_LOC 5 .debug_loc.dwo | |
9445 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
9446 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
9447 | DW_SECT_MACRO 8 .debug_macro.dwo | |
9448 | ||
9449 | The offsets provided by the CU and TU index sections are the base offsets | |
9450 | for the contributions made by each CU or TU to the corresponding section | |
9451 | in the package file. Each CU and TU header contains an abbrev_offset | |
9452 | field, used to find the abbreviations table for that CU or TU within the | |
9453 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
9454 | be interpreted as relative to the base offset given in the index section. | |
9455 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
9456 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
9457 | and offsets into other debug sections obtained from DWARF attributes should | |
9458 | also be interpreted as relative to the corresponding base offset. | |
9459 | ||
9460 | The table of sizes begins immediately following the table of offsets. | |
9461 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
9462 | with L columns and N rows, in row-major order. Each row in the array is | |
9463 | indexed starting from 1 (row 0 is shared by the two tables). | |
9464 | ||
9465 | --- | |
9466 | ||
9467 | Hash table lookup is handled the same in version 1 and 2: | |
9468 | ||
9469 | We assume that N and M will not exceed 2^32 - 1. | |
9470 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
9471 | ||
d2415c6c DE |
9472 | Given a 64-bit compilation unit signature or a type signature S, an entry |
9473 | in the hash table is located as follows: | |
80626a55 | 9474 | |
d2415c6c DE |
9475 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
9476 | the low-order k bits all set to 1. | |
80626a55 | 9477 | |
d2415c6c | 9478 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 9479 | |
d2415c6c DE |
9480 | 3) If the hash table entry at index H matches the signature, use that |
9481 | entry. If the hash table entry at index H is unused (all zeroes), | |
9482 | terminate the search: the signature is not present in the table. | |
80626a55 | 9483 | |
d2415c6c | 9484 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 9485 | |
d2415c6c | 9486 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 9487 | to stop at an unused slot or find the match. */ |
80626a55 DE |
9488 | |
9489 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
9490 | .debug_{info,types}.dwo in DWP_FILE. | |
9491 | Returns NULL if there isn't one. | |
9492 | Note: This function processes DWP files only, not DWO files. */ | |
9493 | ||
9494 | static struct dwp_hash_table * | |
9495 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
9496 | { | |
9497 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9498 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 9499 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 9500 | struct dwarf2_section_info *index; |
73869dc2 | 9501 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
9502 | struct dwp_hash_table *htab; |
9503 | ||
9504 | if (is_debug_types) | |
9505 | index = &dwp_file->sections.tu_index; | |
9506 | else | |
9507 | index = &dwp_file->sections.cu_index; | |
9508 | ||
9509 | if (dwarf2_section_empty_p (index)) | |
9510 | return NULL; | |
9511 | dwarf2_read_section (objfile, index); | |
9512 | ||
9513 | index_ptr = index->buffer; | |
9514 | index_end = index_ptr + index->size; | |
9515 | ||
9516 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
9517 | index_ptr += 4; |
9518 | if (version == 2) | |
9519 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
9520 | else | |
9521 | nr_columns = 0; | |
9522 | index_ptr += 4; | |
80626a55 DE |
9523 | nr_units = read_4_bytes (dbfd, index_ptr); |
9524 | index_ptr += 4; | |
9525 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
9526 | index_ptr += 4; | |
9527 | ||
73869dc2 | 9528 | if (version != 1 && version != 2) |
80626a55 | 9529 | { |
21aa081e | 9530 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 9531 | " [in module %s]"), |
21aa081e | 9532 | pulongest (version), dwp_file->name); |
80626a55 DE |
9533 | } |
9534 | if (nr_slots != (nr_slots & -nr_slots)) | |
9535 | { | |
21aa081e | 9536 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 9537 | " is not power of 2 [in module %s]"), |
21aa081e | 9538 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
9539 | } |
9540 | ||
9541 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
9542 | htab->version = version; |
9543 | htab->nr_columns = nr_columns; | |
80626a55 DE |
9544 | htab->nr_units = nr_units; |
9545 | htab->nr_slots = nr_slots; | |
9546 | htab->hash_table = index_ptr; | |
9547 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
9548 | |
9549 | /* Exit early if the table is empty. */ | |
9550 | if (nr_slots == 0 || nr_units == 0 | |
9551 | || (version == 2 && nr_columns == 0)) | |
9552 | { | |
9553 | /* All must be zero. */ | |
9554 | if (nr_slots != 0 || nr_units != 0 | |
9555 | || (version == 2 && nr_columns != 0)) | |
9556 | { | |
9557 | complaint (&symfile_complaints, | |
9558 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
9559 | " all zero [in modules %s]"), | |
9560 | dwp_file->name); | |
9561 | } | |
9562 | return htab; | |
9563 | } | |
9564 | ||
9565 | if (version == 1) | |
9566 | { | |
9567 | htab->section_pool.v1.indices = | |
9568 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9569 | /* It's harder to decide whether the section is too small in v1. | |
9570 | V1 is deprecated anyway so we punt. */ | |
9571 | } | |
9572 | else | |
9573 | { | |
9574 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9575 | int *ids = htab->section_pool.v2.section_ids; | |
9576 | /* Reverse map for error checking. */ | |
9577 | int ids_seen[DW_SECT_MAX + 1]; | |
9578 | int i; | |
9579 | ||
9580 | if (nr_columns < 2) | |
9581 | { | |
9582 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
9583 | " in section table [in module %s]"), | |
9584 | dwp_file->name); | |
9585 | } | |
9586 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
9587 | { | |
9588 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
9589 | " in section table [in module %s]"), | |
9590 | dwp_file->name); | |
9591 | } | |
9592 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9593 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9594 | for (i = 0; i < nr_columns; ++i) | |
9595 | { | |
9596 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
9597 | ||
9598 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
9599 | { | |
9600 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
9601 | " in section table [in module %s]"), | |
9602 | id, dwp_file->name); | |
9603 | } | |
9604 | if (ids_seen[id] != -1) | |
9605 | { | |
9606 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
9607 | " id %d in section table [in module %s]"), | |
9608 | id, dwp_file->name); | |
9609 | } | |
9610 | ids_seen[id] = i; | |
9611 | ids[i] = id; | |
9612 | } | |
9613 | /* Must have exactly one info or types section. */ | |
9614 | if (((ids_seen[DW_SECT_INFO] != -1) | |
9615 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
9616 | != 1) | |
9617 | { | |
9618 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
9619 | " DWO info/types section [in module %s]"), | |
9620 | dwp_file->name); | |
9621 | } | |
9622 | /* Must have an abbrev section. */ | |
9623 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
9624 | { | |
9625 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
9626 | " section [in module %s]"), | |
9627 | dwp_file->name); | |
9628 | } | |
9629 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
9630 | htab->section_pool.v2.sizes = | |
9631 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
9632 | * nr_units * nr_columns); | |
9633 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
9634 | * nr_units * nr_columns)) | |
9635 | > index_end) | |
9636 | { | |
9637 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
9638 | " [in module %s]"), | |
9639 | dwp_file->name); | |
9640 | } | |
9641 | } | |
80626a55 DE |
9642 | |
9643 | return htab; | |
9644 | } | |
9645 | ||
9646 | /* Update SECTIONS with the data from SECTP. | |
9647 | ||
9648 | This function is like the other "locate" section routines that are | |
9649 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 9650 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
9651 | |
9652 | The result is non-zero for success, or zero if an error was found. */ | |
9653 | ||
9654 | static int | |
73869dc2 DE |
9655 | locate_v1_virtual_dwo_sections (asection *sectp, |
9656 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
9657 | { |
9658 | const struct dwop_section_names *names = &dwop_section_names; | |
9659 | ||
9660 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9661 | { | |
9662 | /* There can be only one. */ | |
73869dc2 | 9663 | if (sections->abbrev.s.asection != NULL) |
80626a55 | 9664 | return 0; |
73869dc2 | 9665 | sections->abbrev.s.asection = sectp; |
80626a55 DE |
9666 | sections->abbrev.size = bfd_get_section_size (sectp); |
9667 | } | |
9668 | else if (section_is_p (sectp->name, &names->info_dwo) | |
9669 | || section_is_p (sectp->name, &names->types_dwo)) | |
9670 | { | |
9671 | /* There can be only one. */ | |
73869dc2 | 9672 | if (sections->info_or_types.s.asection != NULL) |
80626a55 | 9673 | return 0; |
73869dc2 | 9674 | sections->info_or_types.s.asection = sectp; |
80626a55 DE |
9675 | sections->info_or_types.size = bfd_get_section_size (sectp); |
9676 | } | |
9677 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9678 | { | |
9679 | /* There can be only one. */ | |
73869dc2 | 9680 | if (sections->line.s.asection != NULL) |
80626a55 | 9681 | return 0; |
73869dc2 | 9682 | sections->line.s.asection = sectp; |
80626a55 DE |
9683 | sections->line.size = bfd_get_section_size (sectp); |
9684 | } | |
9685 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9686 | { | |
9687 | /* There can be only one. */ | |
73869dc2 | 9688 | if (sections->loc.s.asection != NULL) |
80626a55 | 9689 | return 0; |
73869dc2 | 9690 | sections->loc.s.asection = sectp; |
80626a55 DE |
9691 | sections->loc.size = bfd_get_section_size (sectp); |
9692 | } | |
9693 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9694 | { | |
9695 | /* There can be only one. */ | |
73869dc2 | 9696 | if (sections->macinfo.s.asection != NULL) |
80626a55 | 9697 | return 0; |
73869dc2 | 9698 | sections->macinfo.s.asection = sectp; |
80626a55 DE |
9699 | sections->macinfo.size = bfd_get_section_size (sectp); |
9700 | } | |
9701 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9702 | { | |
9703 | /* There can be only one. */ | |
73869dc2 | 9704 | if (sections->macro.s.asection != NULL) |
80626a55 | 9705 | return 0; |
73869dc2 | 9706 | sections->macro.s.asection = sectp; |
80626a55 DE |
9707 | sections->macro.size = bfd_get_section_size (sectp); |
9708 | } | |
9709 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9710 | { | |
9711 | /* There can be only one. */ | |
73869dc2 | 9712 | if (sections->str_offsets.s.asection != NULL) |
80626a55 | 9713 | return 0; |
73869dc2 | 9714 | sections->str_offsets.s.asection = sectp; |
80626a55 DE |
9715 | sections->str_offsets.size = bfd_get_section_size (sectp); |
9716 | } | |
9717 | else | |
9718 | { | |
9719 | /* No other kind of section is valid. */ | |
9720 | return 0; | |
9721 | } | |
9722 | ||
9723 | return 1; | |
9724 | } | |
9725 | ||
73869dc2 DE |
9726 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
9727 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
9728 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
9729 | This is for DWP version 1 files. */ | |
80626a55 DE |
9730 | |
9731 | static struct dwo_unit * | |
73869dc2 DE |
9732 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
9733 | uint32_t unit_index, | |
9734 | const char *comp_dir, | |
9735 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
9736 | { |
9737 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
9738 | const struct dwp_hash_table *dwp_htab = |
9739 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
9740 | bfd *dbfd = dwp_file->dbfd; |
9741 | const char *kind = is_debug_types ? "TU" : "CU"; | |
9742 | struct dwo_file *dwo_file; | |
9743 | struct dwo_unit *dwo_unit; | |
73869dc2 | 9744 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
9745 | void **dwo_file_slot; |
9746 | char *virtual_dwo_name; | |
9747 | struct dwarf2_section_info *cutu; | |
9748 | struct cleanup *cleanups; | |
9749 | int i; | |
9750 | ||
73869dc2 DE |
9751 | gdb_assert (dwp_file->version == 1); |
9752 | ||
80626a55 DE |
9753 | if (dwarf2_read_debug) |
9754 | { | |
73869dc2 | 9755 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 9756 | kind, |
73869dc2 | 9757 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
9758 | dwp_file->name); |
9759 | } | |
9760 | ||
19ac8c2e | 9761 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
9762 | Put a limit on the number of sections we look for so that bad data |
9763 | doesn't cause us to loop forever. */ | |
9764 | ||
73869dc2 | 9765 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
9766 | (1 /* .debug_info or .debug_types */ \ |
9767 | + 1 /* .debug_abbrev */ \ | |
9768 | + 1 /* .debug_line */ \ | |
9769 | + 1 /* .debug_loc */ \ | |
9770 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 9771 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
9772 | + 1 /* trailing zero */) |
9773 | ||
9774 | memset (§ions, 0, sizeof (sections)); | |
9775 | cleanups = make_cleanup (null_cleanup, 0); | |
9776 | ||
73869dc2 | 9777 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
9778 | { |
9779 | asection *sectp; | |
9780 | uint32_t section_nr = | |
9781 | read_4_bytes (dbfd, | |
73869dc2 DE |
9782 | dwp_htab->section_pool.v1.indices |
9783 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
9784 | |
9785 | if (section_nr == 0) | |
9786 | break; | |
9787 | if (section_nr >= dwp_file->num_sections) | |
9788 | { | |
9789 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
9790 | " [in module %s]"), | |
9791 | dwp_file->name); | |
9792 | } | |
9793 | ||
9794 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 9795 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
9796 | { |
9797 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
9798 | " [in module %s]"), | |
9799 | dwp_file->name); | |
9800 | } | |
9801 | } | |
9802 | ||
9803 | if (i < 2 | |
a32a8923 DE |
9804 | || dwarf2_section_empty_p (§ions.info_or_types) |
9805 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
9806 | { |
9807 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
9808 | " [in module %s]"), | |
9809 | dwp_file->name); | |
9810 | } | |
73869dc2 | 9811 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
9812 | { |
9813 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
9814 | " [in module %s]"), | |
9815 | dwp_file->name); | |
9816 | } | |
9817 | ||
9818 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
9819 | have dwo_unit "live" in that. At least for now. | |
9820 | ||
9821 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 9822 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
9823 | file, we can combine them back into a virtual DWO file to save space |
9824 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
9825 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
9826 | ||
2792b94d PM |
9827 | virtual_dwo_name = |
9828 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
9829 | get_section_id (§ions.abbrev), |
9830 | get_section_id (§ions.line), | |
9831 | get_section_id (§ions.loc), | |
9832 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
9833 | make_cleanup (xfree, virtual_dwo_name); |
9834 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 9835 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
9836 | /* Create one if necessary. */ |
9837 | if (*dwo_file_slot == NULL) | |
9838 | { | |
9839 | if (dwarf2_read_debug) | |
9840 | { | |
9841 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
9842 | virtual_dwo_name); | |
9843 | } | |
9844 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9845 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, |
9846 | virtual_dwo_name, | |
9847 | strlen (virtual_dwo_name)); | |
9848 | dwo_file->comp_dir = comp_dir; | |
80626a55 DE |
9849 | dwo_file->sections.abbrev = sections.abbrev; |
9850 | dwo_file->sections.line = sections.line; | |
9851 | dwo_file->sections.loc = sections.loc; | |
9852 | dwo_file->sections.macinfo = sections.macinfo; | |
9853 | dwo_file->sections.macro = sections.macro; | |
9854 | dwo_file->sections.str_offsets = sections.str_offsets; | |
9855 | /* The "str" section is global to the entire DWP file. */ | |
9856 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 9857 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
9858 | there's no need to record it in dwo_file. |
9859 | Also, we can't simply record type sections in dwo_file because | |
9860 | we record a pointer into the vector in dwo_unit. As we collect more | |
9861 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
9862 | for it, invalidating all copies of pointers into the previous |
9863 | contents. */ | |
80626a55 DE |
9864 | *dwo_file_slot = dwo_file; |
9865 | } | |
9866 | else | |
9867 | { | |
9868 | if (dwarf2_read_debug) | |
9869 | { | |
9870 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
9871 | virtual_dwo_name); | |
9872 | } | |
9873 | dwo_file = *dwo_file_slot; | |
9874 | } | |
9875 | do_cleanups (cleanups); | |
9876 | ||
9877 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9878 | dwo_unit->dwo_file = dwo_file; | |
9879 | dwo_unit->signature = signature; | |
8a0459fd DE |
9880 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, |
9881 | sizeof (struct dwarf2_section_info)); | |
9882 | *dwo_unit->section = sections.info_or_types; | |
57d63ce2 | 9883 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
9884 | |
9885 | return dwo_unit; | |
9886 | } | |
9887 | ||
73869dc2 DE |
9888 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
9889 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
9890 | piece within that section used by a TU/CU, return a virtual section | |
9891 | of just that piece. */ | |
9892 | ||
9893 | static struct dwarf2_section_info | |
9894 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
9895 | bfd_size_type offset, bfd_size_type size) | |
9896 | { | |
9897 | struct dwarf2_section_info result; | |
9898 | asection *sectp; | |
9899 | ||
9900 | gdb_assert (section != NULL); | |
9901 | gdb_assert (!section->is_virtual); | |
9902 | ||
9903 | memset (&result, 0, sizeof (result)); | |
9904 | result.s.containing_section = section; | |
9905 | result.is_virtual = 1; | |
9906 | ||
9907 | if (size == 0) | |
9908 | return result; | |
9909 | ||
9910 | sectp = get_section_bfd_section (section); | |
9911 | ||
9912 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
9913 | bounds of the real section. This is a pretty-rare event, so just | |
9914 | flag an error (easier) instead of a warning and trying to cope. */ | |
9915 | if (sectp == NULL | |
9916 | || offset + size > bfd_get_section_size (sectp)) | |
9917 | { | |
9918 | bfd *abfd = sectp->owner; | |
9919 | ||
9920 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
9921 | " in section %s [in module %s]"), | |
9922 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
9923 | objfile_name (dwarf2_per_objfile->objfile)); | |
9924 | } | |
9925 | ||
9926 | result.virtual_offset = offset; | |
9927 | result.size = size; | |
9928 | return result; | |
9929 | } | |
9930 | ||
9931 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
9932 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
9933 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
9934 | This is for DWP version 2 files. */ | |
9935 | ||
9936 | static struct dwo_unit * | |
9937 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
9938 | uint32_t unit_index, | |
9939 | const char *comp_dir, | |
9940 | ULONGEST signature, int is_debug_types) | |
9941 | { | |
9942 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9943 | const struct dwp_hash_table *dwp_htab = | |
9944 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9945 | bfd *dbfd = dwp_file->dbfd; | |
9946 | const char *kind = is_debug_types ? "TU" : "CU"; | |
9947 | struct dwo_file *dwo_file; | |
9948 | struct dwo_unit *dwo_unit; | |
9949 | struct virtual_v2_dwo_sections sections; | |
9950 | void **dwo_file_slot; | |
9951 | char *virtual_dwo_name; | |
9952 | struct dwarf2_section_info *cutu; | |
9953 | struct cleanup *cleanups; | |
9954 | int i; | |
9955 | ||
9956 | gdb_assert (dwp_file->version == 2); | |
9957 | ||
9958 | if (dwarf2_read_debug) | |
9959 | { | |
9960 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
9961 | kind, | |
9962 | pulongest (unit_index), hex_string (signature), | |
9963 | dwp_file->name); | |
9964 | } | |
9965 | ||
9966 | /* Fetch the section offsets of this DWO unit. */ | |
9967 | ||
9968 | memset (§ions, 0, sizeof (sections)); | |
9969 | cleanups = make_cleanup (null_cleanup, 0); | |
9970 | ||
9971 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
9972 | { | |
9973 | uint32_t offset = read_4_bytes (dbfd, | |
9974 | dwp_htab->section_pool.v2.offsets | |
9975 | + (((unit_index - 1) * dwp_htab->nr_columns | |
9976 | + i) | |
9977 | * sizeof (uint32_t))); | |
9978 | uint32_t size = read_4_bytes (dbfd, | |
9979 | dwp_htab->section_pool.v2.sizes | |
9980 | + (((unit_index - 1) * dwp_htab->nr_columns | |
9981 | + i) | |
9982 | * sizeof (uint32_t))); | |
9983 | ||
9984 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
9985 | { | |
9986 | case DW_SECT_INFO: | |
9987 | case DW_SECT_TYPES: | |
9988 | sections.info_or_types_offset = offset; | |
9989 | sections.info_or_types_size = size; | |
9990 | break; | |
9991 | case DW_SECT_ABBREV: | |
9992 | sections.abbrev_offset = offset; | |
9993 | sections.abbrev_size = size; | |
9994 | break; | |
9995 | case DW_SECT_LINE: | |
9996 | sections.line_offset = offset; | |
9997 | sections.line_size = size; | |
9998 | break; | |
9999 | case DW_SECT_LOC: | |
10000 | sections.loc_offset = offset; | |
10001 | sections.loc_size = size; | |
10002 | break; | |
10003 | case DW_SECT_STR_OFFSETS: | |
10004 | sections.str_offsets_offset = offset; | |
10005 | sections.str_offsets_size = size; | |
10006 | break; | |
10007 | case DW_SECT_MACINFO: | |
10008 | sections.macinfo_offset = offset; | |
10009 | sections.macinfo_size = size; | |
10010 | break; | |
10011 | case DW_SECT_MACRO: | |
10012 | sections.macro_offset = offset; | |
10013 | sections.macro_size = size; | |
10014 | break; | |
10015 | } | |
10016 | } | |
10017 | ||
10018 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10019 | have dwo_unit "live" in that. At least for now. | |
10020 | ||
10021 | The DWP file can be made up of a random collection of CUs and TUs. | |
10022 | However, for each CU + set of TUs that came from the same original DWO | |
10023 | file, we can combine them back into a virtual DWO file to save space | |
10024 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10025 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10026 | ||
10027 | virtual_dwo_name = | |
10028 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10029 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10030 | (long) (sections.line_size ? sections.line_offset : 0), | |
10031 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10032 | (long) (sections.str_offsets_size | |
10033 | ? sections.str_offsets_offset : 0)); | |
10034 | make_cleanup (xfree, virtual_dwo_name); | |
10035 | /* Can we use an existing virtual DWO file? */ | |
10036 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10037 | /* Create one if necessary. */ | |
10038 | if (*dwo_file_slot == NULL) | |
10039 | { | |
10040 | if (dwarf2_read_debug) | |
10041 | { | |
10042 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10043 | virtual_dwo_name); | |
10044 | } | |
10045 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
10046 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, | |
10047 | virtual_dwo_name, | |
10048 | strlen (virtual_dwo_name)); | |
10049 | dwo_file->comp_dir = comp_dir; | |
10050 | dwo_file->sections.abbrev = | |
10051 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10052 | sections.abbrev_offset, sections.abbrev_size); | |
10053 | dwo_file->sections.line = | |
10054 | create_dwp_v2_section (&dwp_file->sections.line, | |
10055 | sections.line_offset, sections.line_size); | |
10056 | dwo_file->sections.loc = | |
10057 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10058 | sections.loc_offset, sections.loc_size); | |
10059 | dwo_file->sections.macinfo = | |
10060 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10061 | sections.macinfo_offset, sections.macinfo_size); | |
10062 | dwo_file->sections.macro = | |
10063 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10064 | sections.macro_offset, sections.macro_size); | |
10065 | dwo_file->sections.str_offsets = | |
10066 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10067 | sections.str_offsets_offset, | |
10068 | sections.str_offsets_size); | |
10069 | /* The "str" section is global to the entire DWP file. */ | |
10070 | dwo_file->sections.str = dwp_file->sections.str; | |
10071 | /* The info or types section is assigned below to dwo_unit, | |
10072 | there's no need to record it in dwo_file. | |
10073 | Also, we can't simply record type sections in dwo_file because | |
10074 | we record a pointer into the vector in dwo_unit. As we collect more | |
10075 | types we'll grow the vector and eventually have to reallocate space | |
10076 | for it, invalidating all copies of pointers into the previous | |
10077 | contents. */ | |
10078 | *dwo_file_slot = dwo_file; | |
10079 | } | |
10080 | else | |
10081 | { | |
10082 | if (dwarf2_read_debug) | |
10083 | { | |
10084 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10085 | virtual_dwo_name); | |
10086 | } | |
10087 | dwo_file = *dwo_file_slot; | |
10088 | } | |
10089 | do_cleanups (cleanups); | |
10090 | ||
10091 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10092 | dwo_unit->dwo_file = dwo_file; | |
10093 | dwo_unit->signature = signature; | |
10094 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, | |
10095 | sizeof (struct dwarf2_section_info)); | |
10096 | *dwo_unit->section = create_dwp_v2_section (is_debug_types | |
10097 | ? &dwp_file->sections.types | |
10098 | : &dwp_file->sections.info, | |
10099 | sections.info_or_types_offset, | |
10100 | sections.info_or_types_size); | |
10101 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10102 | ||
10103 | return dwo_unit; | |
10104 | } | |
10105 | ||
57d63ce2 DE |
10106 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10107 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10108 | |
10109 | static struct dwo_unit * | |
57d63ce2 DE |
10110 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10111 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10112 | { |
57d63ce2 DE |
10113 | const struct dwp_hash_table *dwp_htab = |
10114 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10115 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10116 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10117 | uint32_t hash = signature & mask; |
10118 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10119 | unsigned int i; | |
10120 | void **slot; | |
10121 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
10122 | ||
10123 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10124 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10125 | slot = htab_find_slot (is_debug_types |
10126 | ? dwp_file->loaded_tus | |
10127 | : dwp_file->loaded_cus, | |
10128 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10129 | |
10130 | if (*slot != NULL) | |
10131 | return *slot; | |
10132 | ||
10133 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10134 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10135 | { |
10136 | ULONGEST signature_in_table; | |
10137 | ||
10138 | signature_in_table = | |
57d63ce2 | 10139 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10140 | if (signature_in_table == signature) |
10141 | { | |
57d63ce2 DE |
10142 | uint32_t unit_index = |
10143 | read_4_bytes (dbfd, | |
10144 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10145 | |
73869dc2 DE |
10146 | if (dwp_file->version == 1) |
10147 | { | |
10148 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10149 | comp_dir, signature, | |
10150 | is_debug_types); | |
10151 | } | |
10152 | else | |
10153 | { | |
10154 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10155 | comp_dir, signature, | |
10156 | is_debug_types); | |
10157 | } | |
80626a55 DE |
10158 | return *slot; |
10159 | } | |
10160 | if (signature_in_table == 0) | |
10161 | return NULL; | |
10162 | hash = (hash + hash2) & mask; | |
10163 | } | |
10164 | ||
10165 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10166 | " [in module %s]"), | |
10167 | dwp_file->name); | |
10168 | } | |
10169 | ||
ab5088bf | 10170 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10171 | Open the file specified by FILE_NAME and hand it off to BFD for |
10172 | preliminary analysis. Return a newly initialized bfd *, which | |
10173 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10174 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10175 | SEARCH_CWD is true if the current directory is to be searched. |
10176 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10177 | If successful, the file is added to the bfd include table of the |
10178 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10179 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10180 | NOTE: This function is derived from symfile_bfd_open. */ |
10181 | ||
10182 | static bfd * | |
6ac97d4c | 10183 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
10184 | { |
10185 | bfd *sym_bfd; | |
80626a55 | 10186 | int desc, flags; |
3019eac3 | 10187 | char *absolute_name; |
9c02c129 DE |
10188 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10189 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10190 | to debug_file_directory. */ | |
10191 | char *search_path; | |
10192 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10193 | ||
6ac97d4c DE |
10194 | if (search_cwd) |
10195 | { | |
10196 | if (*debug_file_directory != '\0') | |
10197 | search_path = concat (".", dirname_separator_string, | |
10198 | debug_file_directory, NULL); | |
10199 | else | |
10200 | search_path = xstrdup ("."); | |
10201 | } | |
9c02c129 | 10202 | else |
6ac97d4c | 10203 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10204 | |
492c0ab7 | 10205 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10206 | if (is_dwp) |
10207 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10208 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10209 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10210 | xfree (search_path); |
3019eac3 DE |
10211 | if (desc < 0) |
10212 | return NULL; | |
10213 | ||
bb397797 | 10214 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 10215 | xfree (absolute_name); |
9c02c129 DE |
10216 | if (sym_bfd == NULL) |
10217 | return NULL; | |
3019eac3 DE |
10218 | bfd_set_cacheable (sym_bfd, 1); |
10219 | ||
10220 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
10221 | { | |
cbb099e8 | 10222 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
10223 | return NULL; |
10224 | } | |
10225 | ||
13aaf454 DE |
10226 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10227 | This is important because things like demangled_names_hash lives in the | |
10228 | objfile's per_bfd space and may have references to things like symbol | |
10229 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
10230 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd); | |
10231 | ||
3019eac3 DE |
10232 | return sym_bfd; |
10233 | } | |
10234 | ||
ab5088bf | 10235 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10236 | COMP_DIR is the DW_AT_comp_dir attribute. |
10237 | The result is the bfd handle of the file. | |
10238 | If there is a problem finding or opening the file, return NULL. | |
10239 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10240 | same as symfile_bfd_open. */ | |
10241 | ||
10242 | static bfd * | |
ab5088bf | 10243 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
10244 | { |
10245 | bfd *abfd; | |
3019eac3 | 10246 | |
80626a55 | 10247 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10248 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10249 | |
10250 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10251 | ||
10252 | if (comp_dir != NULL) | |
10253 | { | |
80626a55 | 10254 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
10255 | |
10256 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10257 | search path, which seems useful. */ | |
6ac97d4c | 10258 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10259 | xfree (path_to_try); |
10260 | if (abfd != NULL) | |
10261 | return abfd; | |
10262 | } | |
10263 | ||
10264 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10265 | is a list of paths. */ | |
10266 | ||
10267 | if (*debug_file_directory == '\0') | |
10268 | return NULL; | |
10269 | ||
6ac97d4c | 10270 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10271 | } |
10272 | ||
80626a55 DE |
10273 | /* This function is mapped across the sections and remembers the offset and |
10274 | size of each of the DWO debugging sections we are interested in. */ | |
10275 | ||
10276 | static void | |
10277 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10278 | { | |
10279 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
10280 | const struct dwop_section_names *names = &dwop_section_names; | |
10281 | ||
10282 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10283 | { | |
73869dc2 | 10284 | dwo_sections->abbrev.s.asection = sectp; |
80626a55 DE |
10285 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10286 | } | |
10287 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10288 | { | |
73869dc2 | 10289 | dwo_sections->info.s.asection = sectp; |
80626a55 DE |
10290 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10291 | } | |
10292 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10293 | { | |
73869dc2 | 10294 | dwo_sections->line.s.asection = sectp; |
80626a55 DE |
10295 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10296 | } | |
10297 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10298 | { | |
73869dc2 | 10299 | dwo_sections->loc.s.asection = sectp; |
80626a55 DE |
10300 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10301 | } | |
10302 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10303 | { | |
73869dc2 | 10304 | dwo_sections->macinfo.s.asection = sectp; |
80626a55 DE |
10305 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10306 | } | |
10307 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10308 | { | |
73869dc2 | 10309 | dwo_sections->macro.s.asection = sectp; |
80626a55 DE |
10310 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10311 | } | |
10312 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10313 | { | |
73869dc2 | 10314 | dwo_sections->str.s.asection = sectp; |
80626a55 DE |
10315 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10316 | } | |
10317 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10318 | { | |
73869dc2 | 10319 | dwo_sections->str_offsets.s.asection = sectp; |
80626a55 DE |
10320 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10321 | } | |
10322 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10323 | { | |
10324 | struct dwarf2_section_info type_section; | |
10325 | ||
10326 | memset (&type_section, 0, sizeof (type_section)); | |
73869dc2 | 10327 | type_section.s.asection = sectp; |
80626a55 DE |
10328 | type_section.size = bfd_get_section_size (sectp); |
10329 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10330 | &type_section); | |
10331 | } | |
10332 | } | |
10333 | ||
ab5088bf | 10334 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10335 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10336 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10337 | |
10338 | static struct dwo_file * | |
0ac5b59e DE |
10339 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10340 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10341 | { |
10342 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10343 | struct dwo_file *dwo_file; |
10344 | bfd *dbfd; | |
3019eac3 DE |
10345 | struct cleanup *cleanups; |
10346 | ||
ab5088bf | 10347 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
10348 | if (dbfd == NULL) |
10349 | { | |
10350 | if (dwarf2_read_debug) | |
10351 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
10352 | return NULL; | |
10353 | } | |
10354 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10355 | dwo_file->dwo_name = dwo_name; |
10356 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 10357 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
10358 | |
10359 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10360 | ||
80626a55 | 10361 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 10362 | |
19c3d4c9 | 10363 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
10364 | |
10365 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
10366 | dwo_file->sections.types); | |
10367 | ||
10368 | discard_cleanups (cleanups); | |
10369 | ||
80626a55 DE |
10370 | if (dwarf2_read_debug) |
10371 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
10372 | ||
3019eac3 DE |
10373 | return dwo_file; |
10374 | } | |
10375 | ||
80626a55 | 10376 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10377 | size of each of the DWP debugging sections common to version 1 and 2 that |
10378 | we are interested in. */ | |
3019eac3 | 10379 | |
80626a55 | 10380 | static void |
73869dc2 DE |
10381 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10382 | void *dwp_file_ptr) | |
3019eac3 | 10383 | { |
80626a55 DE |
10384 | struct dwp_file *dwp_file = dwp_file_ptr; |
10385 | const struct dwop_section_names *names = &dwop_section_names; | |
10386 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10387 | |
80626a55 | 10388 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10389 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10390 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10391 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10392 | |
80626a55 DE |
10393 | /* Look for specific sections that we need. */ |
10394 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10395 | { | |
73869dc2 | 10396 | dwp_file->sections.str.s.asection = sectp; |
80626a55 DE |
10397 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10398 | } | |
10399 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10400 | { | |
73869dc2 | 10401 | dwp_file->sections.cu_index.s.asection = sectp; |
80626a55 DE |
10402 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10403 | } | |
10404 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10405 | { | |
73869dc2 | 10406 | dwp_file->sections.tu_index.s.asection = sectp; |
80626a55 DE |
10407 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10408 | } | |
10409 | } | |
3019eac3 | 10410 | |
73869dc2 DE |
10411 | /* This function is mapped across the sections and remembers the offset and |
10412 | size of each of the DWP version 2 debugging sections that we are interested | |
10413 | in. This is split into a separate function because we don't know if we | |
10414 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10415 | ||
10416 | static void | |
10417 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10418 | { | |
10419 | struct dwp_file *dwp_file = dwp_file_ptr; | |
10420 | const struct dwop_section_names *names = &dwop_section_names; | |
10421 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10422 | ||
10423 | /* Record the ELF section number for later lookup: this is what the | |
10424 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10425 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10426 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10427 | ||
10428 | /* Look for specific sections that we need. */ | |
10429 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10430 | { | |
10431 | dwp_file->sections.abbrev.s.asection = sectp; | |
10432 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); | |
10433 | } | |
10434 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10435 | { | |
10436 | dwp_file->sections.info.s.asection = sectp; | |
10437 | dwp_file->sections.info.size = bfd_get_section_size (sectp); | |
10438 | } | |
10439 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10440 | { | |
10441 | dwp_file->sections.line.s.asection = sectp; | |
10442 | dwp_file->sections.line.size = bfd_get_section_size (sectp); | |
10443 | } | |
10444 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10445 | { | |
10446 | dwp_file->sections.loc.s.asection = sectp; | |
10447 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); | |
10448 | } | |
10449 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10450 | { | |
10451 | dwp_file->sections.macinfo.s.asection = sectp; | |
10452 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); | |
10453 | } | |
10454 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10455 | { | |
10456 | dwp_file->sections.macro.s.asection = sectp; | |
10457 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); | |
10458 | } | |
10459 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10460 | { | |
10461 | dwp_file->sections.str_offsets.s.asection = sectp; | |
10462 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); | |
10463 | } | |
10464 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10465 | { | |
10466 | dwp_file->sections.types.s.asection = sectp; | |
10467 | dwp_file->sections.types.size = bfd_get_section_size (sectp); | |
10468 | } | |
10469 | } | |
10470 | ||
80626a55 | 10471 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10472 | |
80626a55 DE |
10473 | static hashval_t |
10474 | hash_dwp_loaded_cutus (const void *item) | |
10475 | { | |
10476 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 10477 | |
80626a55 DE |
10478 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
10479 | return dwo_unit->signature; | |
3019eac3 DE |
10480 | } |
10481 | ||
80626a55 | 10482 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10483 | |
80626a55 DE |
10484 | static int |
10485 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 10486 | { |
80626a55 DE |
10487 | const struct dwo_unit *dua = a; |
10488 | const struct dwo_unit *dub = b; | |
3019eac3 | 10489 | |
80626a55 DE |
10490 | return dua->signature == dub->signature; |
10491 | } | |
3019eac3 | 10492 | |
80626a55 | 10493 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10494 | |
80626a55 DE |
10495 | static htab_t |
10496 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
10497 | { | |
10498 | return htab_create_alloc_ex (3, | |
10499 | hash_dwp_loaded_cutus, | |
10500 | eq_dwp_loaded_cutus, | |
10501 | NULL, | |
10502 | &objfile->objfile_obstack, | |
10503 | hashtab_obstack_allocate, | |
10504 | dummy_obstack_deallocate); | |
10505 | } | |
3019eac3 | 10506 | |
ab5088bf DE |
10507 | /* Try to open DWP file FILE_NAME. |
10508 | The result is the bfd handle of the file. | |
10509 | If there is a problem finding or opening the file, return NULL. | |
10510 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10511 | same as symfile_bfd_open. */ | |
10512 | ||
10513 | static bfd * | |
10514 | open_dwp_file (const char *file_name) | |
10515 | { | |
6ac97d4c DE |
10516 | bfd *abfd; |
10517 | ||
10518 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
10519 | if (abfd != NULL) | |
10520 | return abfd; | |
10521 | ||
10522 | /* Work around upstream bug 15652. | |
10523 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
10524 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
10525 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
10526 | of the executable's path may have discarded the needed info. | |
10527 | [IWBN if the dwp file name was recorded in the executable, akin to | |
10528 | .gnu_debuglink, but that doesn't exist yet.] | |
10529 | Strip the directory from FILE_NAME and search again. */ | |
10530 | if (*debug_file_directory != '\0') | |
10531 | { | |
10532 | /* Don't implicitly search the current directory here. | |
10533 | If the user wants to search "." to handle this case, | |
10534 | it must be added to debug-file-directory. */ | |
10535 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
10536 | 0 /*search_cwd*/); | |
10537 | } | |
10538 | ||
10539 | return NULL; | |
ab5088bf DE |
10540 | } |
10541 | ||
80626a55 DE |
10542 | /* Initialize the use of the DWP file for the current objfile. |
10543 | By convention the name of the DWP file is ${objfile}.dwp. | |
10544 | The result is NULL if it can't be found. */ | |
a766d390 | 10545 | |
80626a55 | 10546 | static struct dwp_file * |
ab5088bf | 10547 | open_and_init_dwp_file (void) |
80626a55 DE |
10548 | { |
10549 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10550 | struct dwp_file *dwp_file; | |
10551 | char *dwp_name; | |
10552 | bfd *dbfd; | |
10553 | struct cleanup *cleanups; | |
10554 | ||
82bf32bc JK |
10555 | /* Try to find first .dwp for the binary file before any symbolic links |
10556 | resolving. */ | |
10557 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
80626a55 DE |
10558 | cleanups = make_cleanup (xfree, dwp_name); |
10559 | ||
ab5088bf | 10560 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
10561 | if (dbfd == NULL |
10562 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
10563 | { | |
10564 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
10565 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
10566 | make_cleanup (xfree, dwp_name); | |
10567 | dbfd = open_dwp_file (dwp_name); | |
10568 | } | |
10569 | ||
80626a55 DE |
10570 | if (dbfd == NULL) |
10571 | { | |
10572 | if (dwarf2_read_debug) | |
10573 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
10574 | do_cleanups (cleanups); | |
10575 | return NULL; | |
3019eac3 | 10576 | } |
80626a55 | 10577 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 10578 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
10579 | dwp_file->dbfd = dbfd; |
10580 | do_cleanups (cleanups); | |
c906108c | 10581 | |
80626a55 DE |
10582 | /* +1: section 0 is unused */ |
10583 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
10584 | dwp_file->elf_sections = | |
10585 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
10586 | dwp_file->num_sections, asection *); | |
10587 | ||
73869dc2 | 10588 | bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file); |
80626a55 DE |
10589 | |
10590 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
10591 | ||
10592 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
10593 | ||
73869dc2 DE |
10594 | /* The DWP file version is stored in the hash table. Oh well. */ |
10595 | if (dwp_file->cus->version != dwp_file->tus->version) | |
10596 | { | |
10597 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 10598 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 10599 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
10600 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
10601 | " TU version %s [in DWP file %s]"), | |
10602 | pulongest (dwp_file->cus->version), | |
10603 | pulongest (dwp_file->tus->version), dwp_name); | |
73869dc2 DE |
10604 | } |
10605 | dwp_file->version = dwp_file->cus->version; | |
10606 | ||
10607 | if (dwp_file->version == 2) | |
10608 | bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file); | |
10609 | ||
19ac8c2e DE |
10610 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
10611 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 10612 | |
80626a55 DE |
10613 | if (dwarf2_read_debug) |
10614 | { | |
10615 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
10616 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
10617 | " %s CUs, %s TUs\n", |
10618 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
10619 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
10620 | } |
10621 | ||
10622 | return dwp_file; | |
3019eac3 | 10623 | } |
c906108c | 10624 | |
ab5088bf DE |
10625 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
10626 | ||
10627 | static struct dwp_file * | |
10628 | get_dwp_file (void) | |
10629 | { | |
10630 | if (! dwarf2_per_objfile->dwp_checked) | |
10631 | { | |
10632 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
10633 | dwarf2_per_objfile->dwp_checked = 1; | |
10634 | } | |
10635 | return dwarf2_per_objfile->dwp_file; | |
10636 | } | |
10637 | ||
80626a55 DE |
10638 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
10639 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
10640 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 10641 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
10642 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
10643 | ||
10644 | This is called, for example, when wanting to read a variable with a | |
10645 | complex location. Therefore we don't want to do file i/o for every call. | |
10646 | Therefore we don't want to look for a DWO file on every call. | |
10647 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
10648 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
10649 | for a DWO file. | |
10650 | ||
1c658ad5 | 10651 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 10652 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 10653 | |
3019eac3 | 10654 | static struct dwo_unit * |
80626a55 DE |
10655 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
10656 | const char *dwo_name, const char *comp_dir, | |
10657 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
10658 | { |
10659 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10660 | const char *kind = is_debug_types ? "TU" : "CU"; |
10661 | void **dwo_file_slot; | |
3019eac3 | 10662 | struct dwo_file *dwo_file; |
80626a55 | 10663 | struct dwp_file *dwp_file; |
cb1df416 | 10664 | |
6a506a2d DE |
10665 | /* First see if there's a DWP file. |
10666 | If we have a DWP file but didn't find the DWO inside it, don't | |
10667 | look for the original DWO file. It makes gdb behave differently | |
10668 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 10669 | |
ab5088bf | 10670 | dwp_file = get_dwp_file (); |
80626a55 | 10671 | if (dwp_file != NULL) |
cf2c3c16 | 10672 | { |
80626a55 DE |
10673 | const struct dwp_hash_table *dwp_htab = |
10674 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10675 | ||
10676 | if (dwp_htab != NULL) | |
10677 | { | |
10678 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
10679 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
10680 | signature, is_debug_types); | |
80626a55 DE |
10681 | |
10682 | if (dwo_cutu != NULL) | |
10683 | { | |
10684 | if (dwarf2_read_debug) | |
10685 | { | |
10686 | fprintf_unfiltered (gdb_stdlog, | |
10687 | "Virtual DWO %s %s found: @%s\n", | |
10688 | kind, hex_string (signature), | |
10689 | host_address_to_string (dwo_cutu)); | |
10690 | } | |
10691 | return dwo_cutu; | |
10692 | } | |
10693 | } | |
10694 | } | |
6a506a2d | 10695 | else |
80626a55 | 10696 | { |
6a506a2d | 10697 | /* No DWP file, look for the DWO file. */ |
80626a55 | 10698 | |
6a506a2d DE |
10699 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
10700 | if (*dwo_file_slot == NULL) | |
80626a55 | 10701 | { |
6a506a2d DE |
10702 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
10703 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 10704 | } |
6a506a2d DE |
10705 | /* NOTE: This will be NULL if unable to open the file. */ |
10706 | dwo_file = *dwo_file_slot; | |
3019eac3 | 10707 | |
6a506a2d | 10708 | if (dwo_file != NULL) |
19c3d4c9 | 10709 | { |
6a506a2d DE |
10710 | struct dwo_unit *dwo_cutu = NULL; |
10711 | ||
10712 | if (is_debug_types && dwo_file->tus) | |
10713 | { | |
10714 | struct dwo_unit find_dwo_cutu; | |
10715 | ||
10716 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
10717 | find_dwo_cutu.signature = signature; | |
10718 | dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu); | |
10719 | } | |
10720 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 10721 | { |
6a506a2d DE |
10722 | if (signature == dwo_file->cu->signature) |
10723 | dwo_cutu = dwo_file->cu; | |
10724 | } | |
10725 | ||
10726 | if (dwo_cutu != NULL) | |
10727 | { | |
10728 | if (dwarf2_read_debug) | |
10729 | { | |
10730 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
10731 | kind, dwo_name, hex_string (signature), | |
10732 | host_address_to_string (dwo_cutu)); | |
10733 | } | |
10734 | return dwo_cutu; | |
80626a55 DE |
10735 | } |
10736 | } | |
2e276125 | 10737 | } |
9cdd5dbd | 10738 | |
80626a55 DE |
10739 | /* We didn't find it. This could mean a dwo_id mismatch, or |
10740 | someone deleted the DWO/DWP file, or the search path isn't set up | |
10741 | correctly to find the file. */ | |
10742 | ||
10743 | if (dwarf2_read_debug) | |
10744 | { | |
10745 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
10746 | kind, dwo_name, hex_string (signature)); | |
10747 | } | |
3019eac3 | 10748 | |
6656a72d DE |
10749 | /* This is a warning and not a complaint because it can be caused by |
10750 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
10751 | { |
10752 | /* Print the name of the DWP file if we looked there, helps the user | |
10753 | better diagnose the problem. */ | |
10754 | char *dwp_text = NULL; | |
10755 | struct cleanup *cleanups; | |
10756 | ||
10757 | if (dwp_file != NULL) | |
10758 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
10759 | cleanups = make_cleanup (xfree, dwp_text); | |
10760 | ||
10761 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
10762 | " [in module %s]"), | |
10763 | kind, dwo_name, hex_string (signature), | |
10764 | dwp_text != NULL ? dwp_text : "", | |
10765 | this_unit->is_debug_types ? "TU" : "CU", | |
10766 | this_unit->offset.sect_off, objfile_name (objfile)); | |
10767 | ||
10768 | do_cleanups (cleanups); | |
10769 | } | |
3019eac3 | 10770 | return NULL; |
5fb290d7 DJ |
10771 | } |
10772 | ||
80626a55 DE |
10773 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
10774 | See lookup_dwo_cutu_unit for details. */ | |
10775 | ||
10776 | static struct dwo_unit * | |
10777 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
10778 | const char *dwo_name, const char *comp_dir, | |
10779 | ULONGEST signature) | |
10780 | { | |
10781 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
10782 | } | |
10783 | ||
10784 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
10785 | See lookup_dwo_cutu_unit for details. */ | |
10786 | ||
10787 | static struct dwo_unit * | |
10788 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
10789 | const char *dwo_name, const char *comp_dir) | |
10790 | { | |
10791 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
10792 | } | |
10793 | ||
89e63ee4 DE |
10794 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
10795 | ||
10796 | static int | |
10797 | queue_and_load_dwo_tu (void **slot, void *info) | |
10798 | { | |
10799 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
10800 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
10801 | ULONGEST signature = dwo_unit->signature; | |
10802 | struct signatured_type *sig_type = | |
10803 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
10804 | ||
10805 | if (sig_type != NULL) | |
10806 | { | |
10807 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
10808 | ||
10809 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
10810 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
10811 | while processing PER_CU. */ | |
10812 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
10813 | load_full_type_unit (sig_cu); | |
10814 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
10815 | } | |
10816 | ||
10817 | return 1; | |
10818 | } | |
10819 | ||
10820 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
10821 | The DWO may have the only definition of the type, though it may not be | |
10822 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
10823 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
10824 | ||
10825 | static void | |
10826 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
10827 | { | |
10828 | struct dwo_unit *dwo_unit; | |
10829 | struct dwo_file *dwo_file; | |
10830 | ||
10831 | gdb_assert (!per_cu->is_debug_types); | |
10832 | gdb_assert (get_dwp_file () == NULL); | |
10833 | gdb_assert (per_cu->cu != NULL); | |
10834 | ||
10835 | dwo_unit = per_cu->cu->dwo_unit; | |
10836 | gdb_assert (dwo_unit != NULL); | |
10837 | ||
10838 | dwo_file = dwo_unit->dwo_file; | |
10839 | if (dwo_file->tus != NULL) | |
10840 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
10841 | } | |
10842 | ||
3019eac3 DE |
10843 | /* Free all resources associated with DWO_FILE. |
10844 | Close the DWO file and munmap the sections. | |
10845 | All memory should be on the objfile obstack. */ | |
348e048f DE |
10846 | |
10847 | static void | |
3019eac3 | 10848 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 10849 | { |
3019eac3 DE |
10850 | int ix; |
10851 | struct dwarf2_section_info *section; | |
348e048f | 10852 | |
5c6fa7ab | 10853 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 10854 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 10855 | |
3019eac3 DE |
10856 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
10857 | } | |
348e048f | 10858 | |
3019eac3 | 10859 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 10860 | |
3019eac3 DE |
10861 | static void |
10862 | free_dwo_file_cleanup (void *arg) | |
10863 | { | |
10864 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
10865 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 10866 | |
3019eac3 DE |
10867 | free_dwo_file (dwo_file, objfile); |
10868 | } | |
348e048f | 10869 | |
3019eac3 | 10870 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 10871 | |
3019eac3 DE |
10872 | static int |
10873 | free_dwo_file_from_slot (void **slot, void *info) | |
10874 | { | |
10875 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
10876 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 10877 | |
3019eac3 | 10878 | free_dwo_file (dwo_file, objfile); |
348e048f | 10879 | |
3019eac3 DE |
10880 | return 1; |
10881 | } | |
348e048f | 10882 | |
3019eac3 | 10883 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 10884 | |
3019eac3 DE |
10885 | static void |
10886 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
10887 | { | |
10888 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 10889 | } |
3019eac3 DE |
10890 | \f |
10891 | /* Read in various DIEs. */ | |
348e048f | 10892 | |
d389af10 JK |
10893 | /* qsort helper for inherit_abstract_dies. */ |
10894 | ||
10895 | static int | |
10896 | unsigned_int_compar (const void *ap, const void *bp) | |
10897 | { | |
10898 | unsigned int a = *(unsigned int *) ap; | |
10899 | unsigned int b = *(unsigned int *) bp; | |
10900 | ||
10901 | return (a > b) - (b > a); | |
10902 | } | |
10903 | ||
10904 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
10905 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
10906 | already referenced by DW_AT_abstract_origin from the children of the | |
10907 | current DIE. */ | |
d389af10 JK |
10908 | |
10909 | static void | |
10910 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
10911 | { | |
10912 | struct die_info *child_die; | |
10913 | unsigned die_children_count; | |
10914 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
10915 | sect_offset *offsets; |
10916 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
10917 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
10918 | struct die_info *origin_die; | |
10919 | /* Iterator of the ORIGIN_DIE children. */ | |
10920 | struct die_info *origin_child_die; | |
10921 | struct cleanup *cleanups; | |
10922 | struct attribute *attr; | |
cd02d79d PA |
10923 | struct dwarf2_cu *origin_cu; |
10924 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
10925 | |
10926 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
10927 | if (!attr) | |
10928 | return; | |
10929 | ||
cd02d79d PA |
10930 | /* Note that following die references may follow to a die in a |
10931 | different cu. */ | |
10932 | ||
10933 | origin_cu = cu; | |
10934 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
10935 | ||
10936 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
10937 | symbols in. */ | |
10938 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
10939 | origin_cu->list_in_scope = cu->list_in_scope; | |
10940 | ||
edb3359d DJ |
10941 | if (die->tag != origin_die->tag |
10942 | && !(die->tag == DW_TAG_inlined_subroutine | |
10943 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
10944 | complaint (&symfile_complaints, |
10945 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 10946 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
10947 | |
10948 | child_die = die->child; | |
10949 | die_children_count = 0; | |
10950 | while (child_die && child_die->tag) | |
10951 | { | |
10952 | child_die = sibling_die (child_die); | |
10953 | die_children_count++; | |
10954 | } | |
10955 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
10956 | cleanups = make_cleanup (xfree, offsets); | |
10957 | ||
10958 | offsets_end = offsets; | |
10959 | child_die = die->child; | |
10960 | while (child_die && child_die->tag) | |
10961 | { | |
c38f313d DJ |
10962 | /* For each CHILD_DIE, find the corresponding child of |
10963 | ORIGIN_DIE. If there is more than one layer of | |
10964 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
10965 | but GCC versions at least through 4.4 generate this (GCC PR | |
10966 | 40573). */ | |
10967 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 10968 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 10969 | |
c38f313d DJ |
10970 | while (1) |
10971 | { | |
cd02d79d PA |
10972 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
10973 | child_origin_cu); | |
c38f313d DJ |
10974 | if (attr == NULL) |
10975 | break; | |
cd02d79d PA |
10976 | child_origin_die = follow_die_ref (child_origin_die, attr, |
10977 | &child_origin_cu); | |
c38f313d DJ |
10978 | } |
10979 | ||
d389af10 JK |
10980 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
10981 | counterpart may exist. */ | |
c38f313d | 10982 | if (child_origin_die != child_die) |
d389af10 | 10983 | { |
edb3359d DJ |
10984 | if (child_die->tag != child_origin_die->tag |
10985 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
10986 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
10987 | complaint (&symfile_complaints, |
10988 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
10989 | "different tags"), child_die->offset.sect_off, |
10990 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
10991 | if (child_origin_die->parent != origin_die) |
10992 | complaint (&symfile_complaints, | |
10993 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
10994 | "different parents"), child_die->offset.sect_off, |
10995 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
10996 | else |
10997 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
10998 | } |
10999 | child_die = sibling_die (child_die); | |
11000 | } | |
11001 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11002 | unsigned_int_compar); | |
11003 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 11004 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
11005 | complaint (&symfile_complaints, |
11006 | _("Multiple children of DIE 0x%x refer " | |
11007 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 11008 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
11009 | |
11010 | offsetp = offsets; | |
11011 | origin_child_die = origin_die->child; | |
11012 | while (origin_child_die && origin_child_die->tag) | |
11013 | { | |
11014 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
11015 | while (offsetp < offsets_end |
11016 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 11017 | offsetp++; |
b64f50a1 JK |
11018 | if (offsetp >= offsets_end |
11019 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 | 11020 | { |
adde2bff DE |
11021 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11022 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11023 | This can happen with mutually referenced abstract_origins. | |
11024 | PR 16581. */ | |
11025 | if (!origin_child_die->in_process) | |
11026 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11027 | } |
11028 | origin_child_die = sibling_die (origin_child_die); | |
11029 | } | |
cd02d79d | 11030 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11031 | |
11032 | do_cleanups (cleanups); | |
11033 | } | |
11034 | ||
c906108c | 11035 | static void |
e7c27a73 | 11036 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11037 | { |
e7c27a73 | 11038 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 11039 | struct context_stack *new; |
c906108c SS |
11040 | CORE_ADDR lowpc; |
11041 | CORE_ADDR highpc; | |
11042 | struct die_info *child_die; | |
edb3359d | 11043 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11044 | const char *name; |
e142c38c | 11045 | CORE_ADDR baseaddr; |
801e3a5b | 11046 | struct block *block; |
edb3359d | 11047 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11048 | VEC (symbolp) *template_args = NULL; |
11049 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11050 | |
11051 | if (inlined_func) | |
11052 | { | |
11053 | /* If we do not have call site information, we can't show the | |
11054 | caller of this inlined function. That's too confusing, so | |
11055 | only use the scope for local variables. */ | |
11056 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11057 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11058 | if (call_line == NULL || call_file == NULL) | |
11059 | { | |
11060 | read_lexical_block_scope (die, cu); | |
11061 | return; | |
11062 | } | |
11063 | } | |
c906108c | 11064 | |
e142c38c DJ |
11065 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11066 | ||
94af9270 | 11067 | name = dwarf2_name (die, cu); |
c906108c | 11068 | |
e8d05480 JB |
11069 | /* Ignore functions with missing or empty names. These are actually |
11070 | illegal according to the DWARF standard. */ | |
11071 | if (name == NULL) | |
11072 | { | |
11073 | complaint (&symfile_complaints, | |
b64f50a1 JK |
11074 | _("missing name for subprogram DIE at %d"), |
11075 | die->offset.sect_off); | |
e8d05480 JB |
11076 | return; |
11077 | } | |
11078 | ||
11079 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
11080 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
11081 | { | |
ae4d0c03 PM |
11082 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11083 | if (!attr || !DW_UNSND (attr)) | |
11084 | complaint (&symfile_complaints, | |
3e43a32a MS |
11085 | _("cannot get low and high bounds " |
11086 | "for subprogram DIE at %d"), | |
b64f50a1 | 11087 | die->offset.sect_off); |
e8d05480 JB |
11088 | return; |
11089 | } | |
c906108c SS |
11090 | |
11091 | lowpc += baseaddr; | |
11092 | highpc += baseaddr; | |
11093 | ||
34eaf542 TT |
11094 | /* If we have any template arguments, then we must allocate a |
11095 | different sort of symbol. */ | |
11096 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11097 | { | |
11098 | if (child_die->tag == DW_TAG_template_type_param | |
11099 | || child_die->tag == DW_TAG_template_value_param) | |
11100 | { | |
e623cf5d | 11101 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11102 | templ_func->base.is_cplus_template_function = 1; |
11103 | break; | |
11104 | } | |
11105 | } | |
11106 | ||
c906108c | 11107 | new = push_context (0, lowpc); |
34eaf542 TT |
11108 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
11109 | (struct symbol *) templ_func); | |
4c2df51b | 11110 | |
4cecd739 DJ |
11111 | /* If there is a location expression for DW_AT_frame_base, record |
11112 | it. */ | |
e142c38c | 11113 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11114 | if (attr) |
f1e6e072 | 11115 | dwarf2_symbol_mark_computed (attr, new->name, cu, 1); |
4c2df51b | 11116 | |
e142c38c | 11117 | cu->list_in_scope = &local_symbols; |
c906108c | 11118 | |
639d11d3 | 11119 | if (die->child != NULL) |
c906108c | 11120 | { |
639d11d3 | 11121 | child_die = die->child; |
c906108c SS |
11122 | while (child_die && child_die->tag) |
11123 | { | |
34eaf542 TT |
11124 | if (child_die->tag == DW_TAG_template_type_param |
11125 | || child_die->tag == DW_TAG_template_value_param) | |
11126 | { | |
11127 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11128 | ||
f1078f66 DJ |
11129 | if (arg != NULL) |
11130 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11131 | } |
11132 | else | |
11133 | process_die (child_die, cu); | |
c906108c SS |
11134 | child_die = sibling_die (child_die); |
11135 | } | |
11136 | } | |
11137 | ||
d389af10 JK |
11138 | inherit_abstract_dies (die, cu); |
11139 | ||
4a811a97 UW |
11140 | /* If we have a DW_AT_specification, we might need to import using |
11141 | directives from the context of the specification DIE. See the | |
11142 | comment in determine_prefix. */ | |
11143 | if (cu->language == language_cplus | |
11144 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11145 | { | |
11146 | struct dwarf2_cu *spec_cu = cu; | |
11147 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11148 | ||
11149 | while (spec_die) | |
11150 | { | |
11151 | child_die = spec_die->child; | |
11152 | while (child_die && child_die->tag) | |
11153 | { | |
11154 | if (child_die->tag == DW_TAG_imported_module) | |
11155 | process_die (child_die, spec_cu); | |
11156 | child_die = sibling_die (child_die); | |
11157 | } | |
11158 | ||
11159 | /* In some cases, GCC generates specification DIEs that | |
11160 | themselves contain DW_AT_specification attributes. */ | |
11161 | spec_die = die_specification (spec_die, &spec_cu); | |
11162 | } | |
11163 | } | |
11164 | ||
c906108c SS |
11165 | new = pop_context (); |
11166 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
11167 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
11168 | lowpc, highpc, objfile); | |
11169 | ||
df8a16a1 | 11170 | /* For C++, set the block's scope. */ |
195a3f6c | 11171 | if ((cu->language == language_cplus || cu->language == language_fortran) |
4d4ec4e5 | 11172 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11173 | block_set_scope (block, determine_prefix (die, cu), |
11174 | &objfile->objfile_obstack); | |
df8a16a1 | 11175 | |
801e3a5b JB |
11176 | /* If we have address ranges, record them. */ |
11177 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11178 | |
34eaf542 TT |
11179 | /* Attach template arguments to function. */ |
11180 | if (! VEC_empty (symbolp, template_args)) | |
11181 | { | |
11182 | gdb_assert (templ_func != NULL); | |
11183 | ||
11184 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11185 | templ_func->template_arguments | |
11186 | = obstack_alloc (&objfile->objfile_obstack, | |
11187 | (templ_func->n_template_arguments | |
11188 | * sizeof (struct symbol *))); | |
11189 | memcpy (templ_func->template_arguments, | |
11190 | VEC_address (symbolp, template_args), | |
11191 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11192 | VEC_free (symbolp, template_args); | |
11193 | } | |
11194 | ||
208d8187 JB |
11195 | /* In C++, we can have functions nested inside functions (e.g., when |
11196 | a function declares a class that has methods). This means that | |
11197 | when we finish processing a function scope, we may need to go | |
11198 | back to building a containing block's symbol lists. */ | |
11199 | local_symbols = new->locals; | |
27aa8d6a | 11200 | using_directives = new->using_directives; |
208d8187 | 11201 | |
921e78cf JB |
11202 | /* If we've finished processing a top-level function, subsequent |
11203 | symbols go in the file symbol list. */ | |
11204 | if (outermost_context_p ()) | |
e142c38c | 11205 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11206 | } |
11207 | ||
11208 | /* Process all the DIES contained within a lexical block scope. Start | |
11209 | a new scope, process the dies, and then close the scope. */ | |
11210 | ||
11211 | static void | |
e7c27a73 | 11212 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11213 | { |
e7c27a73 | 11214 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 11215 | struct context_stack *new; |
c906108c SS |
11216 | CORE_ADDR lowpc, highpc; |
11217 | struct die_info *child_die; | |
e142c38c DJ |
11218 | CORE_ADDR baseaddr; |
11219 | ||
11220 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11221 | |
11222 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11223 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11224 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11225 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11226 | describe ranges. */ |
d85a05f0 | 11227 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
11228 | return; |
11229 | lowpc += baseaddr; | |
11230 | highpc += baseaddr; | |
11231 | ||
11232 | push_context (0, lowpc); | |
639d11d3 | 11233 | if (die->child != NULL) |
c906108c | 11234 | { |
639d11d3 | 11235 | child_die = die->child; |
c906108c SS |
11236 | while (child_die && child_die->tag) |
11237 | { | |
e7c27a73 | 11238 | process_die (child_die, cu); |
c906108c SS |
11239 | child_die = sibling_die (child_die); |
11240 | } | |
11241 | } | |
11242 | new = pop_context (); | |
11243 | ||
8540c487 | 11244 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 11245 | { |
801e3a5b JB |
11246 | struct block *block |
11247 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
11248 | highpc, objfile); | |
11249 | ||
11250 | /* Note that recording ranges after traversing children, as we | |
11251 | do here, means that recording a parent's ranges entails | |
11252 | walking across all its children's ranges as they appear in | |
11253 | the address map, which is quadratic behavior. | |
11254 | ||
11255 | It would be nicer to record the parent's ranges before | |
11256 | traversing its children, simply overriding whatever you find | |
11257 | there. But since we don't even decide whether to create a | |
11258 | block until after we've traversed its children, that's hard | |
11259 | to do. */ | |
11260 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
11261 | } |
11262 | local_symbols = new->locals; | |
27aa8d6a | 11263 | using_directives = new->using_directives; |
c906108c SS |
11264 | } |
11265 | ||
96408a79 SA |
11266 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
11267 | ||
11268 | static void | |
11269 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11270 | { | |
11271 | struct objfile *objfile = cu->objfile; | |
11272 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11273 | CORE_ADDR pc, baseaddr; | |
11274 | struct attribute *attr; | |
11275 | struct call_site *call_site, call_site_local; | |
11276 | void **slot; | |
11277 | int nparams; | |
11278 | struct die_info *child_die; | |
11279 | ||
11280 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11281 | ||
11282 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11283 | if (!attr) | |
11284 | { | |
11285 | complaint (&symfile_complaints, | |
11286 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
11287 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11288 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11289 | return; |
11290 | } | |
31aa7e4e | 11291 | pc = attr_value_as_address (attr) + baseaddr; |
96408a79 SA |
11292 | |
11293 | if (cu->call_site_htab == NULL) | |
11294 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11295 | NULL, &objfile->objfile_obstack, | |
11296 | hashtab_obstack_allocate, NULL); | |
11297 | call_site_local.pc = pc; | |
11298 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11299 | if (*slot != NULL) | |
11300 | { | |
11301 | complaint (&symfile_complaints, | |
11302 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
11303 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
11304 | paddress (gdbarch, pc), die->offset.sect_off, |
11305 | objfile_name (objfile)); | |
96408a79 SA |
11306 | return; |
11307 | } | |
11308 | ||
11309 | /* Count parameters at the caller. */ | |
11310 | ||
11311 | nparams = 0; | |
11312 | for (child_die = die->child; child_die && child_die->tag; | |
11313 | child_die = sibling_die (child_die)) | |
11314 | { | |
11315 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11316 | { | |
11317 | complaint (&symfile_complaints, | |
11318 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
11319 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
11320 | child_die->tag, child_die->offset.sect_off, |
11321 | objfile_name (objfile)); | |
96408a79 SA |
11322 | continue; |
11323 | } | |
11324 | ||
11325 | nparams++; | |
11326 | } | |
11327 | ||
11328 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
11329 | (sizeof (*call_site) | |
11330 | + (sizeof (*call_site->parameter) | |
11331 | * (nparams - 1)))); | |
11332 | *slot = call_site; | |
11333 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11334 | call_site->pc = pc; | |
11335 | ||
11336 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
11337 | { | |
11338 | struct die_info *func_die; | |
11339 | ||
11340 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11341 | for (func_die = die->parent; | |
11342 | func_die && func_die->tag != DW_TAG_subprogram | |
11343 | && func_die->tag != DW_TAG_subroutine_type; | |
11344 | func_die = func_die->parent); | |
11345 | ||
11346 | /* DW_AT_GNU_all_call_sites is a superset | |
11347 | of DW_AT_GNU_all_tail_call_sites. */ | |
11348 | if (func_die | |
11349 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
11350 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
11351 | { | |
11352 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11353 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11354 | both the initial caller containing the real return address PC and | |
11355 | the final callee containing the current PC of a chain of tail | |
11356 | calls do not need to have the tail call list complete. But any | |
11357 | function candidate for a virtual tail call frame searched via | |
11358 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11359 | determined unambiguously. */ | |
11360 | } | |
11361 | else | |
11362 | { | |
11363 | struct type *func_type = NULL; | |
11364 | ||
11365 | if (func_die) | |
11366 | func_type = get_die_type (func_die, cu); | |
11367 | if (func_type != NULL) | |
11368 | { | |
11369 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11370 | ||
11371 | /* Enlist this call site to the function. */ | |
11372 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11373 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11374 | } | |
11375 | else | |
11376 | complaint (&symfile_complaints, | |
11377 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
11378 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11379 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11380 | } |
11381 | } | |
11382 | ||
11383 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11384 | if (attr == NULL) | |
11385 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11386 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
11387 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
11388 | /* Keep NULL DWARF_BLOCK. */; | |
11389 | else if (attr_form_is_block (attr)) | |
11390 | { | |
11391 | struct dwarf2_locexpr_baton *dlbaton; | |
11392 | ||
11393 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
11394 | dlbaton->data = DW_BLOCK (attr)->data; | |
11395 | dlbaton->size = DW_BLOCK (attr)->size; | |
11396 | dlbaton->per_cu = cu->per_cu; | |
11397 | ||
11398 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
11399 | } | |
7771576e | 11400 | else if (attr_form_is_ref (attr)) |
96408a79 | 11401 | { |
96408a79 SA |
11402 | struct dwarf2_cu *target_cu = cu; |
11403 | struct die_info *target_die; | |
11404 | ||
ac9ec31b | 11405 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
11406 | gdb_assert (target_cu->objfile == objfile); |
11407 | if (die_is_declaration (target_die, target_cu)) | |
11408 | { | |
9112db09 JK |
11409 | const char *target_physname = NULL; |
11410 | struct attribute *target_attr; | |
11411 | ||
11412 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
11413 | target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu); | |
11414 | if (target_attr == NULL) | |
11415 | target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name, | |
11416 | target_cu); | |
11417 | if (target_attr != NULL && DW_STRING (target_attr) != NULL) | |
11418 | target_physname = DW_STRING (target_attr); | |
11419 | else | |
11420 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
96408a79 SA |
11421 | if (target_physname == NULL) |
11422 | complaint (&symfile_complaints, | |
11423 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11424 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11425 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11426 | else |
7d455152 | 11427 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
11428 | } |
11429 | else | |
11430 | { | |
11431 | CORE_ADDR lowpc; | |
11432 | ||
11433 | /* DW_AT_entry_pc should be preferred. */ | |
11434 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
11435 | complaint (&symfile_complaints, | |
11436 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11437 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11438 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11439 | else |
11440 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
11441 | } | |
11442 | } | |
11443 | else | |
11444 | complaint (&symfile_complaints, | |
11445 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
11446 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 11447 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11448 | |
11449 | call_site->per_cu = cu->per_cu; | |
11450 | ||
11451 | for (child_die = die->child; | |
11452 | child_die && child_die->tag; | |
11453 | child_die = sibling_die (child_die)) | |
11454 | { | |
96408a79 | 11455 | struct call_site_parameter *parameter; |
1788b2d3 | 11456 | struct attribute *loc, *origin; |
96408a79 SA |
11457 | |
11458 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11459 | { | |
11460 | /* Already printed the complaint above. */ | |
11461 | continue; | |
11462 | } | |
11463 | ||
11464 | gdb_assert (call_site->parameter_count < nparams); | |
11465 | parameter = &call_site->parameter[call_site->parameter_count]; | |
11466 | ||
1788b2d3 JK |
11467 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
11468 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
11469 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 11470 | |
24c5c679 | 11471 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 11472 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 11473 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
11474 | { |
11475 | sect_offset offset; | |
11476 | ||
11477 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
11478 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
11479 | if (!offset_in_cu_p (&cu->header, offset)) |
11480 | { | |
11481 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
11482 | binding can be done only inside one CU. Such referenced DIE | |
11483 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
11484 | complaint (&symfile_complaints, | |
11485 | _("DW_AT_abstract_origin offset is not in CU for " | |
11486 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11487 | "[in module %s]"), | |
4262abfb | 11488 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
11489 | continue; |
11490 | } | |
1788b2d3 JK |
11491 | parameter->u.param_offset.cu_off = (offset.sect_off |
11492 | - cu->header.offset.sect_off); | |
11493 | } | |
11494 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
11495 | { |
11496 | complaint (&symfile_complaints, | |
11497 | _("No DW_FORM_block* DW_AT_location for " | |
11498 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11499 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11500 | continue; |
11501 | } | |
24c5c679 | 11502 | else |
96408a79 | 11503 | { |
24c5c679 JK |
11504 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
11505 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
11506 | if (parameter->u.dwarf_reg != -1) | |
11507 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
11508 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
11509 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
11510 | ¶meter->u.fb_offset)) | |
11511 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
11512 | else | |
11513 | { | |
11514 | complaint (&symfile_complaints, | |
11515 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
11516 | "for DW_FORM_block* DW_AT_location is supported for " | |
11517 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11518 | "[in module %s]"), | |
4262abfb | 11519 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
11520 | continue; |
11521 | } | |
96408a79 SA |
11522 | } |
11523 | ||
11524 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
11525 | if (!attr_form_is_block (attr)) | |
11526 | { | |
11527 | complaint (&symfile_complaints, | |
11528 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
11529 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11530 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11531 | continue; |
11532 | } | |
11533 | parameter->value = DW_BLOCK (attr)->data; | |
11534 | parameter->value_size = DW_BLOCK (attr)->size; | |
11535 | ||
11536 | /* Parameters are not pre-cleared by memset above. */ | |
11537 | parameter->data_value = NULL; | |
11538 | parameter->data_value_size = 0; | |
11539 | call_site->parameter_count++; | |
11540 | ||
11541 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
11542 | if (attr) | |
11543 | { | |
11544 | if (!attr_form_is_block (attr)) | |
11545 | complaint (&symfile_complaints, | |
11546 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
11547 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11548 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11549 | else |
11550 | { | |
11551 | parameter->data_value = DW_BLOCK (attr)->data; | |
11552 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
11553 | } | |
11554 | } | |
11555 | } | |
11556 | } | |
11557 | ||
43039443 | 11558 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
11559 | Return 1 if the attributes are present and valid, otherwise, return 0. |
11560 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
11561 | |
11562 | static int | |
11563 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
11564 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
11565 | struct partial_symtab *ranges_pst) | |
43039443 JK |
11566 | { |
11567 | struct objfile *objfile = cu->objfile; | |
11568 | struct comp_unit_head *cu_header = &cu->header; | |
11569 | bfd *obfd = objfile->obfd; | |
11570 | unsigned int addr_size = cu_header->addr_size; | |
11571 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11572 | /* Base address selection entry. */ | |
11573 | CORE_ADDR base; | |
11574 | int found_base; | |
11575 | unsigned int dummy; | |
d521ce57 | 11576 | const gdb_byte *buffer; |
43039443 JK |
11577 | CORE_ADDR marker; |
11578 | int low_set; | |
11579 | CORE_ADDR low = 0; | |
11580 | CORE_ADDR high = 0; | |
ff013f42 | 11581 | CORE_ADDR baseaddr; |
43039443 | 11582 | |
d00adf39 DE |
11583 | found_base = cu->base_known; |
11584 | base = cu->base_address; | |
43039443 | 11585 | |
be391dca | 11586 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11587 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
11588 | { |
11589 | complaint (&symfile_complaints, | |
11590 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
11591 | offset); | |
11592 | return 0; | |
11593 | } | |
dce234bc | 11594 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
11595 | |
11596 | /* Read in the largest possible address. */ | |
11597 | marker = read_address (obfd, buffer, cu, &dummy); | |
11598 | if ((marker & mask) == mask) | |
11599 | { | |
11600 | /* If we found the largest possible address, then | |
11601 | read the base address. */ | |
11602 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
11603 | buffer += 2 * addr_size; | |
11604 | offset += 2 * addr_size; | |
11605 | found_base = 1; | |
11606 | } | |
11607 | ||
11608 | low_set = 0; | |
11609 | ||
e7030f15 | 11610 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 11611 | |
43039443 JK |
11612 | while (1) |
11613 | { | |
11614 | CORE_ADDR range_beginning, range_end; | |
11615 | ||
11616 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
11617 | buffer += addr_size; | |
11618 | range_end = read_address (obfd, buffer, cu, &dummy); | |
11619 | buffer += addr_size; | |
11620 | offset += 2 * addr_size; | |
11621 | ||
11622 | /* An end of list marker is a pair of zero addresses. */ | |
11623 | if (range_beginning == 0 && range_end == 0) | |
11624 | /* Found the end of list entry. */ | |
11625 | break; | |
11626 | ||
11627 | /* Each base address selection entry is a pair of 2 values. | |
11628 | The first is the largest possible address, the second is | |
11629 | the base address. Check for a base address here. */ | |
11630 | if ((range_beginning & mask) == mask) | |
11631 | { | |
11632 | /* If we found the largest possible address, then | |
11633 | read the base address. */ | |
11634 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
11635 | found_base = 1; | |
11636 | continue; | |
11637 | } | |
11638 | ||
11639 | if (!found_base) | |
11640 | { | |
11641 | /* We have no valid base address for the ranges | |
11642 | data. */ | |
11643 | complaint (&symfile_complaints, | |
11644 | _("Invalid .debug_ranges data (no base address)")); | |
11645 | return 0; | |
11646 | } | |
11647 | ||
9277c30c UW |
11648 | if (range_beginning > range_end) |
11649 | { | |
11650 | /* Inverted range entries are invalid. */ | |
11651 | complaint (&symfile_complaints, | |
11652 | _("Invalid .debug_ranges data (inverted range)")); | |
11653 | return 0; | |
11654 | } | |
11655 | ||
11656 | /* Empty range entries have no effect. */ | |
11657 | if (range_beginning == range_end) | |
11658 | continue; | |
11659 | ||
43039443 JK |
11660 | range_beginning += base; |
11661 | range_end += base; | |
11662 | ||
01093045 DE |
11663 | /* A not-uncommon case of bad debug info. |
11664 | Don't pollute the addrmap with bad data. */ | |
11665 | if (range_beginning + baseaddr == 0 | |
11666 | && !dwarf2_per_objfile->has_section_at_zero) | |
11667 | { | |
11668 | complaint (&symfile_complaints, | |
11669 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 11670 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
11671 | continue; |
11672 | } | |
11673 | ||
9277c30c | 11674 | if (ranges_pst != NULL) |
ff013f42 | 11675 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
11676 | range_beginning + baseaddr, |
11677 | range_end - 1 + baseaddr, | |
ff013f42 JK |
11678 | ranges_pst); |
11679 | ||
43039443 JK |
11680 | /* FIXME: This is recording everything as a low-high |
11681 | segment of consecutive addresses. We should have a | |
11682 | data structure for discontiguous block ranges | |
11683 | instead. */ | |
11684 | if (! low_set) | |
11685 | { | |
11686 | low = range_beginning; | |
11687 | high = range_end; | |
11688 | low_set = 1; | |
11689 | } | |
11690 | else | |
11691 | { | |
11692 | if (range_beginning < low) | |
11693 | low = range_beginning; | |
11694 | if (range_end > high) | |
11695 | high = range_end; | |
11696 | } | |
11697 | } | |
11698 | ||
11699 | if (! low_set) | |
11700 | /* If the first entry is an end-of-list marker, the range | |
11701 | describes an empty scope, i.e. no instructions. */ | |
11702 | return 0; | |
11703 | ||
11704 | if (low_return) | |
11705 | *low_return = low; | |
11706 | if (high_return) | |
11707 | *high_return = high; | |
11708 | return 1; | |
11709 | } | |
11710 | ||
af34e669 DJ |
11711 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
11712 | are present and valid, otherwise, return 0. Return -1 if the range is | |
11713 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 11714 | |
c906108c | 11715 | static int |
af34e669 | 11716 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
11717 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
11718 | struct partial_symtab *pst) | |
c906108c SS |
11719 | { |
11720 | struct attribute *attr; | |
91da1414 | 11721 | struct attribute *attr_high; |
af34e669 DJ |
11722 | CORE_ADDR low = 0; |
11723 | CORE_ADDR high = 0; | |
11724 | int ret = 0; | |
c906108c | 11725 | |
91da1414 MW |
11726 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11727 | if (attr_high) | |
af34e669 | 11728 | { |
e142c38c | 11729 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 11730 | if (attr) |
91da1414 | 11731 | { |
31aa7e4e JB |
11732 | low = attr_value_as_address (attr); |
11733 | high = attr_value_as_address (attr_high); | |
11734 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
11735 | high += low; | |
91da1414 | 11736 | } |
af34e669 DJ |
11737 | else |
11738 | /* Found high w/o low attribute. */ | |
11739 | return 0; | |
11740 | ||
11741 | /* Found consecutive range of addresses. */ | |
11742 | ret = 1; | |
11743 | } | |
c906108c | 11744 | else |
af34e669 | 11745 | { |
e142c38c | 11746 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
11747 | if (attr != NULL) |
11748 | { | |
ab435259 DE |
11749 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
11750 | We take advantage of the fact that DW_AT_ranges does not appear | |
11751 | in DW_TAG_compile_unit of DWO files. */ | |
11752 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
11753 | unsigned int ranges_offset = (DW_UNSND (attr) | |
11754 | + (need_ranges_base | |
11755 | ? cu->ranges_base | |
11756 | : 0)); | |
2e3cf129 | 11757 | |
af34e669 | 11758 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 11759 | .debug_ranges section. */ |
2e3cf129 | 11760 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 11761 | return 0; |
43039443 | 11762 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
11763 | ret = -1; |
11764 | } | |
11765 | } | |
c906108c | 11766 | |
9373cf26 JK |
11767 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
11768 | if (high <= low) | |
c906108c SS |
11769 | return 0; |
11770 | ||
11771 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
11772 | eliminate duplicate copies of functions and vtables and such. | |
11773 | The linker will arbitrarily choose one and discard the others. | |
11774 | The AT_*_pc values for such functions refer to local labels in | |
11775 | these sections. If the section from that file was discarded, the | |
11776 | labels are not in the output, so the relocs get a value of 0. | |
11777 | If this is a discarded function, mark the pc bounds as invalid, | |
11778 | so that GDB will ignore it. */ | |
72dca2f5 | 11779 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
11780 | return 0; |
11781 | ||
11782 | *lowpc = low; | |
96408a79 SA |
11783 | if (highpc) |
11784 | *highpc = high; | |
af34e669 | 11785 | return ret; |
c906108c SS |
11786 | } |
11787 | ||
b084d499 JB |
11788 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
11789 | its low and high PC addresses. Do nothing if these addresses could not | |
11790 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
11791 | and HIGHPC to the high address if greater than HIGHPC. */ | |
11792 | ||
11793 | static void | |
11794 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
11795 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
11796 | struct dwarf2_cu *cu) | |
11797 | { | |
11798 | CORE_ADDR low, high; | |
11799 | struct die_info *child = die->child; | |
11800 | ||
d85a05f0 | 11801 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
11802 | { |
11803 | *lowpc = min (*lowpc, low); | |
11804 | *highpc = max (*highpc, high); | |
11805 | } | |
11806 | ||
11807 | /* If the language does not allow nested subprograms (either inside | |
11808 | subprograms or lexical blocks), we're done. */ | |
11809 | if (cu->language != language_ada) | |
11810 | return; | |
6e70227d | 11811 | |
b084d499 JB |
11812 | /* Check all the children of the given DIE. If it contains nested |
11813 | subprograms, then check their pc bounds. Likewise, we need to | |
11814 | check lexical blocks as well, as they may also contain subprogram | |
11815 | definitions. */ | |
11816 | while (child && child->tag) | |
11817 | { | |
11818 | if (child->tag == DW_TAG_subprogram | |
11819 | || child->tag == DW_TAG_lexical_block) | |
11820 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
11821 | child = sibling_die (child); | |
11822 | } | |
11823 | } | |
11824 | ||
fae299cd DC |
11825 | /* Get the low and high pc's represented by the scope DIE, and store |
11826 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
11827 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
11828 | ||
11829 | static void | |
11830 | get_scope_pc_bounds (struct die_info *die, | |
11831 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
11832 | struct dwarf2_cu *cu) | |
11833 | { | |
11834 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
11835 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
11836 | CORE_ADDR current_low, current_high; | |
11837 | ||
d85a05f0 | 11838 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
11839 | { |
11840 | best_low = current_low; | |
11841 | best_high = current_high; | |
11842 | } | |
11843 | else | |
11844 | { | |
11845 | struct die_info *child = die->child; | |
11846 | ||
11847 | while (child && child->tag) | |
11848 | { | |
11849 | switch (child->tag) { | |
11850 | case DW_TAG_subprogram: | |
b084d499 | 11851 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
11852 | break; |
11853 | case DW_TAG_namespace: | |
f55ee35c | 11854 | case DW_TAG_module: |
fae299cd DC |
11855 | /* FIXME: carlton/2004-01-16: Should we do this for |
11856 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
11857 | that current GCC's always emit the DIEs corresponding | |
11858 | to definitions of methods of classes as children of a | |
11859 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
11860 | the DIEs giving the declarations, which could be | |
11861 | anywhere). But I don't see any reason why the | |
11862 | standards says that they have to be there. */ | |
11863 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
11864 | ||
11865 | if (current_low != ((CORE_ADDR) -1)) | |
11866 | { | |
11867 | best_low = min (best_low, current_low); | |
11868 | best_high = max (best_high, current_high); | |
11869 | } | |
11870 | break; | |
11871 | default: | |
0963b4bd | 11872 | /* Ignore. */ |
fae299cd DC |
11873 | break; |
11874 | } | |
11875 | ||
11876 | child = sibling_die (child); | |
11877 | } | |
11878 | } | |
11879 | ||
11880 | *lowpc = best_low; | |
11881 | *highpc = best_high; | |
11882 | } | |
11883 | ||
801e3a5b JB |
11884 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
11885 | in DIE. */ | |
380bca97 | 11886 | |
801e3a5b JB |
11887 | static void |
11888 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
11889 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
11890 | { | |
bb5ed363 | 11891 | struct objfile *objfile = cu->objfile; |
801e3a5b | 11892 | struct attribute *attr; |
91da1414 | 11893 | struct attribute *attr_high; |
801e3a5b | 11894 | |
91da1414 MW |
11895 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11896 | if (attr_high) | |
801e3a5b | 11897 | { |
801e3a5b JB |
11898 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
11899 | if (attr) | |
11900 | { | |
31aa7e4e JB |
11901 | CORE_ADDR low = attr_value_as_address (attr); |
11902 | CORE_ADDR high = attr_value_as_address (attr_high); | |
11903 | ||
11904 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
11905 | high += low; | |
9a619af0 | 11906 | |
801e3a5b JB |
11907 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
11908 | } | |
11909 | } | |
11910 | ||
11911 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
11912 | if (attr) | |
11913 | { | |
bb5ed363 | 11914 | bfd *obfd = objfile->obfd; |
ab435259 DE |
11915 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
11916 | We take advantage of the fact that DW_AT_ranges does not appear | |
11917 | in DW_TAG_compile_unit of DWO files. */ | |
11918 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
11919 | |
11920 | /* The value of the DW_AT_ranges attribute is the offset of the | |
11921 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
11922 | unsigned long offset = (DW_UNSND (attr) |
11923 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 11924 | const gdb_byte *buffer; |
801e3a5b JB |
11925 | |
11926 | /* For some target architectures, but not others, the | |
11927 | read_address function sign-extends the addresses it returns. | |
11928 | To recognize base address selection entries, we need a | |
11929 | mask. */ | |
11930 | unsigned int addr_size = cu->header.addr_size; | |
11931 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11932 | ||
11933 | /* The base address, to which the next pair is relative. Note | |
11934 | that this 'base' is a DWARF concept: most entries in a range | |
11935 | list are relative, to reduce the number of relocs against the | |
11936 | debugging information. This is separate from this function's | |
11937 | 'baseaddr' argument, which GDB uses to relocate debugging | |
11938 | information from a shared library based on the address at | |
11939 | which the library was loaded. */ | |
d00adf39 DE |
11940 | CORE_ADDR base = cu->base_address; |
11941 | int base_known = cu->base_known; | |
801e3a5b | 11942 | |
d62bfeaf | 11943 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11944 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
11945 | { |
11946 | complaint (&symfile_complaints, | |
11947 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
11948 | offset); | |
11949 | return; | |
11950 | } | |
d62bfeaf | 11951 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
11952 | |
11953 | for (;;) | |
11954 | { | |
11955 | unsigned int bytes_read; | |
11956 | CORE_ADDR start, end; | |
11957 | ||
11958 | start = read_address (obfd, buffer, cu, &bytes_read); | |
11959 | buffer += bytes_read; | |
11960 | end = read_address (obfd, buffer, cu, &bytes_read); | |
11961 | buffer += bytes_read; | |
11962 | ||
11963 | /* Did we find the end of the range list? */ | |
11964 | if (start == 0 && end == 0) | |
11965 | break; | |
11966 | ||
11967 | /* Did we find a base address selection entry? */ | |
11968 | else if ((start & base_select_mask) == base_select_mask) | |
11969 | { | |
11970 | base = end; | |
11971 | base_known = 1; | |
11972 | } | |
11973 | ||
11974 | /* We found an ordinary address range. */ | |
11975 | else | |
11976 | { | |
11977 | if (!base_known) | |
11978 | { | |
11979 | complaint (&symfile_complaints, | |
3e43a32a MS |
11980 | _("Invalid .debug_ranges data " |
11981 | "(no base address)")); | |
801e3a5b JB |
11982 | return; |
11983 | } | |
11984 | ||
9277c30c UW |
11985 | if (start > end) |
11986 | { | |
11987 | /* Inverted range entries are invalid. */ | |
11988 | complaint (&symfile_complaints, | |
11989 | _("Invalid .debug_ranges data " | |
11990 | "(inverted range)")); | |
11991 | return; | |
11992 | } | |
11993 | ||
11994 | /* Empty range entries have no effect. */ | |
11995 | if (start == end) | |
11996 | continue; | |
11997 | ||
01093045 DE |
11998 | start += base + baseaddr; |
11999 | end += base + baseaddr; | |
12000 | ||
12001 | /* A not-uncommon case of bad debug info. | |
12002 | Don't pollute the addrmap with bad data. */ | |
12003 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
12004 | { | |
12005 | complaint (&symfile_complaints, | |
12006 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12007 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12008 | continue; |
12009 | } | |
12010 | ||
12011 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
12012 | } |
12013 | } | |
12014 | } | |
12015 | } | |
12016 | ||
685b1105 JK |
12017 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12018 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12019 | |
685b1105 JK |
12020 | static void |
12021 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
12022 | { |
12023 | const char *cs; | |
12024 | int major, minor, release; | |
12025 | ||
12026 | if (cu->producer == NULL) | |
12027 | { | |
12028 | /* For unknown compilers expect their behavior is DWARF version | |
12029 | compliant. | |
12030 | ||
12031 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12032 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12033 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12034 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12035 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12036 | } |
685b1105 | 12037 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 12038 | { |
685b1105 JK |
12039 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
12040 | ||
ba919b58 TT |
12041 | cs = &cu->producer[strlen ("GNU ")]; |
12042 | while (*cs && !isdigit (*cs)) | |
12043 | cs++; | |
12044 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
12045 | { | |
12046 | /* Not recognized as GCC. */ | |
12047 | } | |
12048 | else | |
1b80a9fa JK |
12049 | { |
12050 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
12051 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
12052 | } | |
685b1105 JK |
12053 | } |
12054 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
12055 | cu->producer_is_icc = 1; | |
12056 | else | |
12057 | { | |
12058 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12059 | compliant. */ | |
60d5a603 JK |
12060 | } |
12061 | ||
ba919b58 | 12062 | cu->checked_producer = 1; |
685b1105 | 12063 | } |
ba919b58 | 12064 | |
685b1105 JK |
12065 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12066 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12067 | during 4.6.0 experimental. */ | |
12068 | ||
12069 | static int | |
12070 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12071 | { | |
12072 | if (!cu->checked_producer) | |
12073 | check_producer (cu); | |
12074 | ||
12075 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12076 | } |
12077 | ||
12078 | /* Return the default accessibility type if it is not overriden by | |
12079 | DW_AT_accessibility. */ | |
12080 | ||
12081 | static enum dwarf_access_attribute | |
12082 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12083 | { | |
12084 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12085 | { | |
12086 | /* The default DWARF 2 accessibility for members is public, the default | |
12087 | accessibility for inheritance is private. */ | |
12088 | ||
12089 | if (die->tag != DW_TAG_inheritance) | |
12090 | return DW_ACCESS_public; | |
12091 | else | |
12092 | return DW_ACCESS_private; | |
12093 | } | |
12094 | else | |
12095 | { | |
12096 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12097 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12098 | depends on the container kind. */ | |
12099 | ||
12100 | if (die->parent->tag == DW_TAG_class_type) | |
12101 | return DW_ACCESS_private; | |
12102 | else | |
12103 | return DW_ACCESS_public; | |
12104 | } | |
12105 | } | |
12106 | ||
74ac6d43 TT |
12107 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12108 | offset. If the attribute was not found return 0, otherwise return | |
12109 | 1. If it was found but could not properly be handled, set *OFFSET | |
12110 | to 0. */ | |
12111 | ||
12112 | static int | |
12113 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12114 | LONGEST *offset) | |
12115 | { | |
12116 | struct attribute *attr; | |
12117 | ||
12118 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12119 | if (attr != NULL) | |
12120 | { | |
12121 | *offset = 0; | |
12122 | ||
12123 | /* Note that we do not check for a section offset first here. | |
12124 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12125 | so if we see it, we can assume that a constant form is really | |
12126 | a constant and not a section offset. */ | |
12127 | if (attr_form_is_constant (attr)) | |
12128 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12129 | else if (attr_form_is_section_offset (attr)) | |
12130 | dwarf2_complex_location_expr_complaint (); | |
12131 | else if (attr_form_is_block (attr)) | |
12132 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12133 | else | |
12134 | dwarf2_complex_location_expr_complaint (); | |
12135 | ||
12136 | return 1; | |
12137 | } | |
12138 | ||
12139 | return 0; | |
12140 | } | |
12141 | ||
c906108c SS |
12142 | /* Add an aggregate field to the field list. */ |
12143 | ||
12144 | static void | |
107d2387 | 12145 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12146 | struct dwarf2_cu *cu) |
6e70227d | 12147 | { |
e7c27a73 | 12148 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12149 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12150 | struct nextfield *new_field; |
12151 | struct attribute *attr; | |
12152 | struct field *fp; | |
15d034d0 | 12153 | const char *fieldname = ""; |
c906108c SS |
12154 | |
12155 | /* Allocate a new field list entry and link it in. */ | |
12156 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 12157 | make_cleanup (xfree, new_field); |
c906108c | 12158 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12159 | |
12160 | if (die->tag == DW_TAG_inheritance) | |
12161 | { | |
12162 | new_field->next = fip->baseclasses; | |
12163 | fip->baseclasses = new_field; | |
12164 | } | |
12165 | else | |
12166 | { | |
12167 | new_field->next = fip->fields; | |
12168 | fip->fields = new_field; | |
12169 | } | |
c906108c SS |
12170 | fip->nfields++; |
12171 | ||
e142c38c | 12172 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12173 | if (attr) |
12174 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12175 | else |
12176 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12177 | if (new_field->accessibility != DW_ACCESS_public) |
12178 | fip->non_public_fields = 1; | |
60d5a603 | 12179 | |
e142c38c | 12180 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12181 | if (attr) |
12182 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12183 | else |
12184 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12185 | |
12186 | fp = &new_field->field; | |
a9a9bd0f | 12187 | |
e142c38c | 12188 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12189 | { |
74ac6d43 TT |
12190 | LONGEST offset; |
12191 | ||
a9a9bd0f | 12192 | /* Data member other than a C++ static data member. */ |
6e70227d | 12193 | |
c906108c | 12194 | /* Get type of field. */ |
e7c27a73 | 12195 | fp->type = die_type (die, cu); |
c906108c | 12196 | |
d6a843b5 | 12197 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12198 | |
c906108c | 12199 | /* Get bit size of field (zero if none). */ |
e142c38c | 12200 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12201 | if (attr) |
12202 | { | |
12203 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12204 | } | |
12205 | else | |
12206 | { | |
12207 | FIELD_BITSIZE (*fp) = 0; | |
12208 | } | |
12209 | ||
12210 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12211 | if (handle_data_member_location (die, cu, &offset)) |
12212 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12213 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12214 | if (attr) |
12215 | { | |
5e2b427d | 12216 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12217 | { |
12218 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12219 | additional bit offset from the MSB of the containing |
12220 | anonymous object to the MSB of the field. We don't | |
12221 | have to do anything special since we don't need to | |
12222 | know the size of the anonymous object. */ | |
f41f5e61 | 12223 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12224 | } |
12225 | else | |
12226 | { | |
12227 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12228 | MSB of the anonymous object, subtract off the number of |
12229 | bits from the MSB of the field to the MSB of the | |
12230 | object, and then subtract off the number of bits of | |
12231 | the field itself. The result is the bit offset of | |
12232 | the LSB of the field. */ | |
c906108c SS |
12233 | int anonymous_size; |
12234 | int bit_offset = DW_UNSND (attr); | |
12235 | ||
e142c38c | 12236 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12237 | if (attr) |
12238 | { | |
12239 | /* The size of the anonymous object containing | |
12240 | the bit field is explicit, so use the | |
12241 | indicated size (in bytes). */ | |
12242 | anonymous_size = DW_UNSND (attr); | |
12243 | } | |
12244 | else | |
12245 | { | |
12246 | /* The size of the anonymous object containing | |
12247 | the bit field must be inferred from the type | |
12248 | attribute of the data member containing the | |
12249 | bit field. */ | |
12250 | anonymous_size = TYPE_LENGTH (fp->type); | |
12251 | } | |
f41f5e61 PA |
12252 | SET_FIELD_BITPOS (*fp, |
12253 | (FIELD_BITPOS (*fp) | |
12254 | + anonymous_size * bits_per_byte | |
12255 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
12256 | } |
12257 | } | |
12258 | ||
12259 | /* Get name of field. */ | |
39cbfefa DJ |
12260 | fieldname = dwarf2_name (die, cu); |
12261 | if (fieldname == NULL) | |
12262 | fieldname = ""; | |
d8151005 DJ |
12263 | |
12264 | /* The name is already allocated along with this objfile, so we don't | |
12265 | need to duplicate it for the type. */ | |
12266 | fp->name = fieldname; | |
c906108c SS |
12267 | |
12268 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 12269 | pointer or virtual base class pointer) to private. */ |
e142c38c | 12270 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 12271 | { |
d48cc9dd | 12272 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
12273 | new_field->accessibility = DW_ACCESS_private; |
12274 | fip->non_public_fields = 1; | |
12275 | } | |
12276 | } | |
a9a9bd0f | 12277 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 12278 | { |
a9a9bd0f DC |
12279 | /* C++ static member. */ |
12280 | ||
12281 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
12282 | is a declaration, but all versions of G++ as of this writing | |
12283 | (so through at least 3.2.1) incorrectly generate | |
12284 | DW_TAG_variable tags. */ | |
6e70227d | 12285 | |
ff355380 | 12286 | const char *physname; |
c906108c | 12287 | |
a9a9bd0f | 12288 | /* Get name of field. */ |
39cbfefa DJ |
12289 | fieldname = dwarf2_name (die, cu); |
12290 | if (fieldname == NULL) | |
c906108c SS |
12291 | return; |
12292 | ||
254e6b9e | 12293 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
12294 | if (attr |
12295 | /* Only create a symbol if this is an external value. | |
12296 | new_symbol checks this and puts the value in the global symbol | |
12297 | table, which we want. If it is not external, new_symbol | |
12298 | will try to put the value in cu->list_in_scope which is wrong. */ | |
12299 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
12300 | { |
12301 | /* A static const member, not much different than an enum as far as | |
12302 | we're concerned, except that we can support more types. */ | |
12303 | new_symbol (die, NULL, cu); | |
12304 | } | |
12305 | ||
2df3850c | 12306 | /* Get physical name. */ |
ff355380 | 12307 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 12308 | |
d8151005 DJ |
12309 | /* The name is already allocated along with this objfile, so we don't |
12310 | need to duplicate it for the type. */ | |
12311 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 12312 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 12313 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
12314 | } |
12315 | else if (die->tag == DW_TAG_inheritance) | |
12316 | { | |
74ac6d43 | 12317 | LONGEST offset; |
d4b96c9a | 12318 | |
74ac6d43 TT |
12319 | /* C++ base class field. */ |
12320 | if (handle_data_member_location (die, cu, &offset)) | |
12321 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 12322 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 12323 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
12324 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
12325 | fip->nbaseclasses++; | |
12326 | } | |
12327 | } | |
12328 | ||
98751a41 JK |
12329 | /* Add a typedef defined in the scope of the FIP's class. */ |
12330 | ||
12331 | static void | |
12332 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
12333 | struct dwarf2_cu *cu) | |
6e70227d | 12334 | { |
98751a41 | 12335 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
12336 | struct typedef_field_list *new_field; |
12337 | struct attribute *attr; | |
12338 | struct typedef_field *fp; | |
12339 | char *fieldname = ""; | |
12340 | ||
12341 | /* Allocate a new field list entry and link it in. */ | |
12342 | new_field = xzalloc (sizeof (*new_field)); | |
12343 | make_cleanup (xfree, new_field); | |
12344 | ||
12345 | gdb_assert (die->tag == DW_TAG_typedef); | |
12346 | ||
12347 | fp = &new_field->field; | |
12348 | ||
12349 | /* Get name of field. */ | |
12350 | fp->name = dwarf2_name (die, cu); | |
12351 | if (fp->name == NULL) | |
12352 | return; | |
12353 | ||
12354 | fp->type = read_type_die (die, cu); | |
12355 | ||
12356 | new_field->next = fip->typedef_field_list; | |
12357 | fip->typedef_field_list = new_field; | |
12358 | fip->typedef_field_list_count++; | |
12359 | } | |
12360 | ||
c906108c SS |
12361 | /* Create the vector of fields, and attach it to the type. */ |
12362 | ||
12363 | static void | |
fba45db2 | 12364 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12365 | struct dwarf2_cu *cu) |
c906108c SS |
12366 | { |
12367 | int nfields = fip->nfields; | |
12368 | ||
12369 | /* Record the field count, allocate space for the array of fields, | |
12370 | and create blank accessibility bitfields if necessary. */ | |
12371 | TYPE_NFIELDS (type) = nfields; | |
12372 | TYPE_FIELDS (type) = (struct field *) | |
12373 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
12374 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
12375 | ||
b4ba55a1 | 12376 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
12377 | { |
12378 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12379 | ||
12380 | TYPE_FIELD_PRIVATE_BITS (type) = | |
12381 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12382 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
12383 | ||
12384 | TYPE_FIELD_PROTECTED_BITS (type) = | |
12385 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12386 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
12387 | ||
774b6a14 TT |
12388 | TYPE_FIELD_IGNORE_BITS (type) = |
12389 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12390 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
12391 | } |
12392 | ||
12393 | /* If the type has baseclasses, allocate and clear a bit vector for | |
12394 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 12395 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
12396 | { |
12397 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 12398 | unsigned char *pointer; |
c906108c SS |
12399 | |
12400 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
12401 | pointer = TYPE_ALLOC (type, num_bytes); |
12402 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
12403 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
12404 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
12405 | } | |
12406 | ||
3e43a32a MS |
12407 | /* Copy the saved-up fields into the field vector. Start from the head of |
12408 | the list, adding to the tail of the field array, so that they end up in | |
12409 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
12410 | while (nfields-- > 0) |
12411 | { | |
7d0ccb61 DJ |
12412 | struct nextfield *fieldp; |
12413 | ||
12414 | if (fip->fields) | |
12415 | { | |
12416 | fieldp = fip->fields; | |
12417 | fip->fields = fieldp->next; | |
12418 | } | |
12419 | else | |
12420 | { | |
12421 | fieldp = fip->baseclasses; | |
12422 | fip->baseclasses = fieldp->next; | |
12423 | } | |
12424 | ||
12425 | TYPE_FIELD (type, nfields) = fieldp->field; | |
12426 | switch (fieldp->accessibility) | |
c906108c | 12427 | { |
c5aa993b | 12428 | case DW_ACCESS_private: |
b4ba55a1 JB |
12429 | if (cu->language != language_ada) |
12430 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 12431 | break; |
c906108c | 12432 | |
c5aa993b | 12433 | case DW_ACCESS_protected: |
b4ba55a1 JB |
12434 | if (cu->language != language_ada) |
12435 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 12436 | break; |
c906108c | 12437 | |
c5aa993b JM |
12438 | case DW_ACCESS_public: |
12439 | break; | |
c906108c | 12440 | |
c5aa993b JM |
12441 | default: |
12442 | /* Unknown accessibility. Complain and treat it as public. */ | |
12443 | { | |
e2e0b3e5 | 12444 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 12445 | fieldp->accessibility); |
c5aa993b JM |
12446 | } |
12447 | break; | |
c906108c SS |
12448 | } |
12449 | if (nfields < fip->nbaseclasses) | |
12450 | { | |
7d0ccb61 | 12451 | switch (fieldp->virtuality) |
c906108c | 12452 | { |
c5aa993b JM |
12453 | case DW_VIRTUALITY_virtual: |
12454 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 12455 | if (cu->language == language_ada) |
a73c6dcd | 12456 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
12457 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
12458 | break; | |
c906108c SS |
12459 | } |
12460 | } | |
c906108c SS |
12461 | } |
12462 | } | |
12463 | ||
7d27a96d TT |
12464 | /* Return true if this member function is a constructor, false |
12465 | otherwise. */ | |
12466 | ||
12467 | static int | |
12468 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
12469 | { | |
12470 | const char *fieldname; | |
12471 | const char *typename; | |
12472 | int len; | |
12473 | ||
12474 | if (die->parent == NULL) | |
12475 | return 0; | |
12476 | ||
12477 | if (die->parent->tag != DW_TAG_structure_type | |
12478 | && die->parent->tag != DW_TAG_union_type | |
12479 | && die->parent->tag != DW_TAG_class_type) | |
12480 | return 0; | |
12481 | ||
12482 | fieldname = dwarf2_name (die, cu); | |
12483 | typename = dwarf2_name (die->parent, cu); | |
12484 | if (fieldname == NULL || typename == NULL) | |
12485 | return 0; | |
12486 | ||
12487 | len = strlen (fieldname); | |
12488 | return (strncmp (fieldname, typename, len) == 0 | |
12489 | && (typename[len] == '\0' || typename[len] == '<')); | |
12490 | } | |
12491 | ||
c906108c SS |
12492 | /* Add a member function to the proper fieldlist. */ |
12493 | ||
12494 | static void | |
107d2387 | 12495 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12496 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 12497 | { |
e7c27a73 | 12498 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12499 | struct attribute *attr; |
12500 | struct fnfieldlist *flp; | |
12501 | int i; | |
12502 | struct fn_field *fnp; | |
15d034d0 | 12503 | const char *fieldname; |
c906108c | 12504 | struct nextfnfield *new_fnfield; |
f792889a | 12505 | struct type *this_type; |
60d5a603 | 12506 | enum dwarf_access_attribute accessibility; |
c906108c | 12507 | |
b4ba55a1 | 12508 | if (cu->language == language_ada) |
a73c6dcd | 12509 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 12510 | |
2df3850c | 12511 | /* Get name of member function. */ |
39cbfefa DJ |
12512 | fieldname = dwarf2_name (die, cu); |
12513 | if (fieldname == NULL) | |
2df3850c | 12514 | return; |
c906108c | 12515 | |
c906108c SS |
12516 | /* Look up member function name in fieldlist. */ |
12517 | for (i = 0; i < fip->nfnfields; i++) | |
12518 | { | |
27bfe10e | 12519 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
12520 | break; |
12521 | } | |
12522 | ||
12523 | /* Create new list element if necessary. */ | |
12524 | if (i < fip->nfnfields) | |
12525 | flp = &fip->fnfieldlists[i]; | |
12526 | else | |
12527 | { | |
12528 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12529 | { | |
12530 | fip->fnfieldlists = (struct fnfieldlist *) | |
12531 | xrealloc (fip->fnfieldlists, | |
12532 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12533 | * sizeof (struct fnfieldlist)); |
c906108c | 12534 | if (fip->nfnfields == 0) |
c13c43fd | 12535 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
12536 | } |
12537 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
12538 | flp->name = fieldname; | |
12539 | flp->length = 0; | |
12540 | flp->head = NULL; | |
3da10d80 | 12541 | i = fip->nfnfields++; |
c906108c SS |
12542 | } |
12543 | ||
12544 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 12545 | entry. */ |
c906108c | 12546 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 12547 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
12548 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
12549 | new_fnfield->next = flp->head; | |
12550 | flp->head = new_fnfield; | |
12551 | flp->length++; | |
12552 | ||
12553 | /* Fill in the member function field info. */ | |
12554 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
12555 | |
12556 | /* Delay processing of the physname until later. */ | |
12557 | if (cu->language == language_cplus || cu->language == language_java) | |
12558 | { | |
12559 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
12560 | die, cu); | |
12561 | } | |
12562 | else | |
12563 | { | |
1d06ead6 | 12564 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
12565 | fnp->physname = physname ? physname : ""; |
12566 | } | |
12567 | ||
c906108c | 12568 | fnp->type = alloc_type (objfile); |
f792889a DJ |
12569 | this_type = read_type_die (die, cu); |
12570 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 12571 | { |
f792889a | 12572 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 12573 | |
f792889a | 12574 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
12575 | of the method itself (TYPE_CODE_METHOD). */ |
12576 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
12577 | TYPE_TARGET_TYPE (this_type), |
12578 | TYPE_FIELDS (this_type), | |
12579 | TYPE_NFIELDS (this_type), | |
12580 | TYPE_VARARGS (this_type)); | |
c906108c SS |
12581 | |
12582 | /* Handle static member functions. | |
c5aa993b | 12583 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
12584 | member functions. G++ helps GDB by marking the first |
12585 | parameter for non-static member functions (which is the this | |
12586 | pointer) as artificial. We obtain this information from | |
12587 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 12588 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
12589 | fnp->voffset = VOFFSET_STATIC; |
12590 | } | |
12591 | else | |
e2e0b3e5 | 12592 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 12593 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
12594 | |
12595 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 12596 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 12597 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 12598 | |
3e43a32a MS |
12599 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
12600 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
12601 | |
12602 | /* Get accessibility. */ | |
e142c38c | 12603 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 12604 | if (attr) |
60d5a603 JK |
12605 | accessibility = DW_UNSND (attr); |
12606 | else | |
12607 | accessibility = dwarf2_default_access_attribute (die, cu); | |
12608 | switch (accessibility) | |
c906108c | 12609 | { |
60d5a603 JK |
12610 | case DW_ACCESS_private: |
12611 | fnp->is_private = 1; | |
12612 | break; | |
12613 | case DW_ACCESS_protected: | |
12614 | fnp->is_protected = 1; | |
12615 | break; | |
c906108c SS |
12616 | } |
12617 | ||
b02dede2 | 12618 | /* Check for artificial methods. */ |
e142c38c | 12619 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
12620 | if (attr && DW_UNSND (attr) != 0) |
12621 | fnp->is_artificial = 1; | |
12622 | ||
7d27a96d TT |
12623 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
12624 | ||
0d564a31 | 12625 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
12626 | function. For older versions of GCC, this is an offset in the |
12627 | appropriate virtual table, as specified by DW_AT_containing_type. | |
12628 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
12629 | to the object address. */ |
12630 | ||
e142c38c | 12631 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 12632 | if (attr) |
8e19ed76 | 12633 | { |
aec5aa8b | 12634 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 12635 | { |
aec5aa8b TT |
12636 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
12637 | { | |
12638 | /* Old-style GCC. */ | |
12639 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
12640 | } | |
12641 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12642 | || (DW_BLOCK (attr)->size > 1 | |
12643 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
12644 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
12645 | { | |
12646 | struct dwarf_block blk; | |
12647 | int offset; | |
12648 | ||
12649 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12650 | ? 1 : 2); | |
12651 | blk.size = DW_BLOCK (attr)->size - offset; | |
12652 | blk.data = DW_BLOCK (attr)->data + offset; | |
12653 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
12654 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
12655 | dwarf2_complex_location_expr_complaint (); | |
12656 | else | |
12657 | fnp->voffset /= cu->header.addr_size; | |
12658 | fnp->voffset += 2; | |
12659 | } | |
12660 | else | |
12661 | dwarf2_complex_location_expr_complaint (); | |
12662 | ||
12663 | if (!fnp->fcontext) | |
12664 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
12665 | } | |
3690dd37 | 12666 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 12667 | { |
4d3c2250 | 12668 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
12669 | } |
12670 | else | |
12671 | { | |
4d3c2250 KB |
12672 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
12673 | fieldname); | |
8e19ed76 | 12674 | } |
0d564a31 | 12675 | } |
d48cc9dd DJ |
12676 | else |
12677 | { | |
12678 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
12679 | if (attr && DW_UNSND (attr)) | |
12680 | { | |
12681 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
12682 | complaint (&symfile_complaints, | |
3e43a32a MS |
12683 | _("Member function \"%s\" (offset %d) is virtual " |
12684 | "but the vtable offset is not specified"), | |
b64f50a1 | 12685 | fieldname, die->offset.sect_off); |
9655fd1a | 12686 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
12687 | TYPE_CPLUS_DYNAMIC (type) = 1; |
12688 | } | |
12689 | } | |
c906108c SS |
12690 | } |
12691 | ||
12692 | /* Create the vector of member function fields, and attach it to the type. */ | |
12693 | ||
12694 | static void | |
fba45db2 | 12695 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12696 | struct dwarf2_cu *cu) |
c906108c SS |
12697 | { |
12698 | struct fnfieldlist *flp; | |
c906108c SS |
12699 | int i; |
12700 | ||
b4ba55a1 | 12701 | if (cu->language == language_ada) |
a73c6dcd | 12702 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 12703 | |
c906108c SS |
12704 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
12705 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
12706 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
12707 | ||
12708 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
12709 | { | |
12710 | struct nextfnfield *nfp = flp->head; | |
12711 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
12712 | int k; | |
12713 | ||
12714 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
12715 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
12716 | fn_flp->fn_fields = (struct fn_field *) | |
12717 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
12718 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 12719 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
12720 | } |
12721 | ||
12722 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
12723 | } |
12724 | ||
1168df01 JB |
12725 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
12726 | language, zero otherwise. */ | |
12727 | static int | |
12728 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
12729 | { | |
12730 | static const char vptr[] = "_vptr"; | |
987504bb | 12731 | static const char vtable[] = "vtable"; |
1168df01 | 12732 | |
987504bb JJ |
12733 | /* Look for the C++ and Java forms of the vtable. */ |
12734 | if ((cu->language == language_java | |
12735 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
12736 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
12737 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
12738 | return 1; |
12739 | ||
12740 | return 0; | |
12741 | } | |
12742 | ||
c0dd20ea | 12743 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
12744 | functions, with the ABI-specified layout. If TYPE describes |
12745 | such a structure, smash it into a member function type. | |
61049d3b DJ |
12746 | |
12747 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
12748 | This is GCC PR debug/28767. */ | |
c0dd20ea | 12749 | |
0b92b5bb TT |
12750 | static void |
12751 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 12752 | { |
0b92b5bb | 12753 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
12754 | |
12755 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
12756 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
12757 | return; | |
c0dd20ea DJ |
12758 | |
12759 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
12760 | if (TYPE_FIELD_NAME (type, 0) == NULL |
12761 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
12762 | || TYPE_FIELD_NAME (type, 1) == NULL | |
12763 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
12764 | return; | |
c0dd20ea DJ |
12765 | |
12766 | /* Find the type of the method. */ | |
0b92b5bb | 12767 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
12768 | if (pfn_type == NULL |
12769 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
12770 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 12771 | return; |
c0dd20ea DJ |
12772 | |
12773 | /* Look for the "this" argument. */ | |
12774 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
12775 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 12776 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 12777 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 12778 | return; |
c0dd20ea DJ |
12779 | |
12780 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
12781 | new_type = alloc_type (objfile); |
12782 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
12783 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
12784 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 12785 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 12786 | } |
1168df01 | 12787 | |
685b1105 JK |
12788 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
12789 | (icc). */ | |
12790 | ||
12791 | static int | |
12792 | producer_is_icc (struct dwarf2_cu *cu) | |
12793 | { | |
12794 | if (!cu->checked_producer) | |
12795 | check_producer (cu); | |
12796 | ||
12797 | return cu->producer_is_icc; | |
12798 | } | |
12799 | ||
c906108c | 12800 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
12801 | (definition) to create a type for the structure or union. Fill in |
12802 | the type's name and general properties; the members will not be | |
3d1d5ea3 | 12803 | processed until process_structure_scope. |
c906108c | 12804 | |
c767944b DJ |
12805 | NOTE: we need to call these functions regardless of whether or not the |
12806 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c SS |
12807 | structure or union. This gets the type entered into our set of |
12808 | user defined types. | |
12809 | ||
12810 | However, if the structure is incomplete (an opaque struct/union) | |
12811 | then suppress creating a symbol table entry for it since gdb only | |
12812 | wants to find the one with the complete definition. Note that if | |
12813 | it is complete, we just call new_symbol, which does it's own | |
12814 | checking about whether the struct/union is anonymous or not (and | |
12815 | suppresses creating a symbol table entry itself). */ | |
12816 | ||
f792889a | 12817 | static struct type * |
134d01f1 | 12818 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12819 | { |
e7c27a73 | 12820 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12821 | struct type *type; |
12822 | struct attribute *attr; | |
15d034d0 | 12823 | const char *name; |
c906108c | 12824 | |
348e048f DE |
12825 | /* If the definition of this type lives in .debug_types, read that type. |
12826 | Don't follow DW_AT_specification though, that will take us back up | |
12827 | the chain and we want to go down. */ | |
45e58e77 | 12828 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
12829 | if (attr) |
12830 | { | |
ac9ec31b | 12831 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 12832 | |
ac9ec31b | 12833 | /* The type's CU may not be the same as CU. |
02142a6c | 12834 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
12835 | return set_die_type (die, type, cu); |
12836 | } | |
12837 | ||
c0dd20ea | 12838 | type = alloc_type (objfile); |
c906108c | 12839 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 12840 | |
39cbfefa DJ |
12841 | name = dwarf2_name (die, cu); |
12842 | if (name != NULL) | |
c906108c | 12843 | { |
987504bb JJ |
12844 | if (cu->language == language_cplus |
12845 | || cu->language == language_java) | |
63d06c5c | 12846 | { |
15d034d0 | 12847 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
12848 | |
12849 | /* dwarf2_full_name might have already finished building the DIE's | |
12850 | type. If so, there is no need to continue. */ | |
12851 | if (get_die_type (die, cu) != NULL) | |
12852 | return get_die_type (die, cu); | |
12853 | ||
12854 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
12855 | if (die->tag == DW_TAG_structure_type |
12856 | || die->tag == DW_TAG_class_type) | |
12857 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
12858 | } |
12859 | else | |
12860 | { | |
d8151005 DJ |
12861 | /* The name is already allocated along with this objfile, so |
12862 | we don't need to duplicate it for the type. */ | |
7d455152 | 12863 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
12864 | if (die->tag == DW_TAG_class_type) |
12865 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 12866 | } |
c906108c SS |
12867 | } |
12868 | ||
12869 | if (die->tag == DW_TAG_structure_type) | |
12870 | { | |
12871 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
12872 | } | |
12873 | else if (die->tag == DW_TAG_union_type) | |
12874 | { | |
12875 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
12876 | } | |
12877 | else | |
12878 | { | |
c906108c SS |
12879 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
12880 | } | |
12881 | ||
0cc2414c TT |
12882 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
12883 | TYPE_DECLARED_CLASS (type) = 1; | |
12884 | ||
e142c38c | 12885 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12886 | if (attr) |
12887 | { | |
12888 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12889 | } | |
12890 | else | |
12891 | { | |
12892 | TYPE_LENGTH (type) = 0; | |
12893 | } | |
12894 | ||
685b1105 JK |
12895 | if (producer_is_icc (cu)) |
12896 | { | |
12897 | /* ICC does not output the required DW_AT_declaration | |
12898 | on incomplete types, but gives them a size of zero. */ | |
12899 | } | |
12900 | else | |
12901 | TYPE_STUB_SUPPORTED (type) = 1; | |
12902 | ||
dc718098 | 12903 | if (die_is_declaration (die, cu)) |
876cecd0 | 12904 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
12905 | else if (attr == NULL && die->child == NULL |
12906 | && producer_is_realview (cu->producer)) | |
12907 | /* RealView does not output the required DW_AT_declaration | |
12908 | on incomplete types. */ | |
12909 | TYPE_STUB (type) = 1; | |
dc718098 | 12910 | |
c906108c SS |
12911 | /* We need to add the type field to the die immediately so we don't |
12912 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 12913 | type within the structure itself. */ |
1c379e20 | 12914 | set_die_type (die, type, cu); |
c906108c | 12915 | |
7e314c57 JK |
12916 | /* set_die_type should be already done. */ |
12917 | set_descriptive_type (type, die, cu); | |
12918 | ||
c767944b DJ |
12919 | return type; |
12920 | } | |
12921 | ||
12922 | /* Finish creating a structure or union type, including filling in | |
12923 | its members and creating a symbol for it. */ | |
12924 | ||
12925 | static void | |
12926 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12927 | { | |
12928 | struct objfile *objfile = cu->objfile; | |
12929 | struct die_info *child_die = die->child; | |
12930 | struct type *type; | |
12931 | ||
12932 | type = get_die_type (die, cu); | |
12933 | if (type == NULL) | |
12934 | type = read_structure_type (die, cu); | |
12935 | ||
e142c38c | 12936 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
12937 | { |
12938 | struct field_info fi; | |
12939 | struct die_info *child_die; | |
34eaf542 | 12940 | VEC (symbolp) *template_args = NULL; |
c767944b | 12941 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
12942 | |
12943 | memset (&fi, 0, sizeof (struct field_info)); | |
12944 | ||
639d11d3 | 12945 | child_die = die->child; |
c906108c SS |
12946 | |
12947 | while (child_die && child_die->tag) | |
12948 | { | |
a9a9bd0f DC |
12949 | if (child_die->tag == DW_TAG_member |
12950 | || child_die->tag == DW_TAG_variable) | |
c906108c | 12951 | { |
a9a9bd0f DC |
12952 | /* NOTE: carlton/2002-11-05: A C++ static data member |
12953 | should be a DW_TAG_member that is a declaration, but | |
12954 | all versions of G++ as of this writing (so through at | |
12955 | least 3.2.1) incorrectly generate DW_TAG_variable | |
12956 | tags for them instead. */ | |
e7c27a73 | 12957 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 12958 | } |
8713b1b1 | 12959 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 12960 | { |
0963b4bd | 12961 | /* C++ member function. */ |
e7c27a73 | 12962 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
12963 | } |
12964 | else if (child_die->tag == DW_TAG_inheritance) | |
12965 | { | |
12966 | /* C++ base class field. */ | |
e7c27a73 | 12967 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 12968 | } |
98751a41 JK |
12969 | else if (child_die->tag == DW_TAG_typedef) |
12970 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
12971 | else if (child_die->tag == DW_TAG_template_type_param |
12972 | || child_die->tag == DW_TAG_template_value_param) | |
12973 | { | |
12974 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12975 | ||
f1078f66 DJ |
12976 | if (arg != NULL) |
12977 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
12978 | } |
12979 | ||
c906108c SS |
12980 | child_die = sibling_die (child_die); |
12981 | } | |
12982 | ||
34eaf542 TT |
12983 | /* Attach template arguments to type. */ |
12984 | if (! VEC_empty (symbolp, template_args)) | |
12985 | { | |
12986 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12987 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12988 | = VEC_length (symbolp, template_args); | |
12989 | TYPE_TEMPLATE_ARGUMENTS (type) | |
12990 | = obstack_alloc (&objfile->objfile_obstack, | |
12991 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12992 | * sizeof (struct symbol *))); | |
12993 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
12994 | VEC_address (symbolp, template_args), | |
12995 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12996 | * sizeof (struct symbol *))); | |
12997 | VEC_free (symbolp, template_args); | |
12998 | } | |
12999 | ||
c906108c SS |
13000 | /* Attach fields and member functions to the type. */ |
13001 | if (fi.nfields) | |
e7c27a73 | 13002 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13003 | if (fi.nfnfields) |
13004 | { | |
e7c27a73 | 13005 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13006 | |
c5aa993b | 13007 | /* Get the type which refers to the base class (possibly this |
c906108c | 13008 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13009 | class from the DW_AT_containing_type attribute. This use of |
13010 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13011 | |
e142c38c | 13012 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13013 | { |
e7c27a73 | 13014 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
13015 | |
13016 | TYPE_VPTR_BASETYPE (type) = t; | |
13017 | if (type == t) | |
13018 | { | |
c906108c SS |
13019 | int i; |
13020 | ||
13021 | /* Our own class provides vtbl ptr. */ | |
13022 | for (i = TYPE_NFIELDS (t) - 1; | |
13023 | i >= TYPE_N_BASECLASSES (t); | |
13024 | --i) | |
13025 | { | |
0d5cff50 | 13026 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13027 | |
1168df01 | 13028 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
13029 | { |
13030 | TYPE_VPTR_FIELDNO (type) = i; | |
13031 | break; | |
13032 | } | |
13033 | } | |
13034 | ||
13035 | /* Complain if virtual function table field not found. */ | |
13036 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13037 | complaint (&symfile_complaints, |
3e43a32a MS |
13038 | _("virtual function table pointer " |
13039 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13040 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13041 | ""); | |
c906108c SS |
13042 | } |
13043 | else | |
13044 | { | |
13045 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
13046 | } | |
13047 | } | |
f6235d4c EZ |
13048 | else if (cu->producer |
13049 | && strncmp (cu->producer, | |
13050 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
13051 | { | |
13052 | /* The IBM XLC compiler does not provide direct indication | |
13053 | of the containing type, but the vtable pointer is | |
13054 | always named __vfp. */ | |
13055 | ||
13056 | int i; | |
13057 | ||
13058 | for (i = TYPE_NFIELDS (type) - 1; | |
13059 | i >= TYPE_N_BASECLASSES (type); | |
13060 | --i) | |
13061 | { | |
13062 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13063 | { | |
13064 | TYPE_VPTR_FIELDNO (type) = i; | |
13065 | TYPE_VPTR_BASETYPE (type) = type; | |
13066 | break; | |
13067 | } | |
13068 | } | |
13069 | } | |
c906108c | 13070 | } |
98751a41 JK |
13071 | |
13072 | /* Copy fi.typedef_field_list linked list elements content into the | |
13073 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13074 | if (fi.typedef_field_list) | |
13075 | { | |
13076 | int i = fi.typedef_field_list_count; | |
13077 | ||
a0d7a4ff | 13078 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
13079 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
13080 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
13081 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
13082 | ||
13083 | /* Reverse the list order to keep the debug info elements order. */ | |
13084 | while (--i >= 0) | |
13085 | { | |
13086 | struct typedef_field *dest, *src; | |
6e70227d | 13087 | |
98751a41 JK |
13088 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13089 | src = &fi.typedef_field_list->field; | |
13090 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13091 | *dest = *src; | |
13092 | } | |
13093 | } | |
c767944b DJ |
13094 | |
13095 | do_cleanups (back_to); | |
eb2a6f42 TT |
13096 | |
13097 | if (HAVE_CPLUS_STRUCT (type)) | |
13098 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 13099 | } |
63d06c5c | 13100 | |
bb5ed363 | 13101 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13102 | |
90aeadfc DC |
13103 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13104 | snapshots) has been known to create a die giving a declaration | |
13105 | for a class that has, as a child, a die giving a definition for a | |
13106 | nested class. So we have to process our children even if the | |
13107 | current die is a declaration. Normally, of course, a declaration | |
13108 | won't have any children at all. */ | |
134d01f1 | 13109 | |
90aeadfc DC |
13110 | while (child_die != NULL && child_die->tag) |
13111 | { | |
13112 | if (child_die->tag == DW_TAG_member | |
13113 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13114 | || child_die->tag == DW_TAG_inheritance |
13115 | || child_die->tag == DW_TAG_template_value_param | |
13116 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13117 | { |
90aeadfc | 13118 | /* Do nothing. */ |
134d01f1 | 13119 | } |
90aeadfc DC |
13120 | else |
13121 | process_die (child_die, cu); | |
134d01f1 | 13122 | |
90aeadfc | 13123 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13124 | } |
13125 | ||
fa4028e9 JB |
13126 | /* Do not consider external references. According to the DWARF standard, |
13127 | these DIEs are identified by the fact that they have no byte_size | |
13128 | attribute, and a declaration attribute. */ | |
13129 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13130 | || !die_is_declaration (die, cu)) | |
c767944b | 13131 | new_symbol (die, type, cu); |
134d01f1 DJ |
13132 | } |
13133 | ||
55426c9d JB |
13134 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13135 | update TYPE using some information only available in DIE's children. */ | |
13136 | ||
13137 | static void | |
13138 | update_enumeration_type_from_children (struct die_info *die, | |
13139 | struct type *type, | |
13140 | struct dwarf2_cu *cu) | |
13141 | { | |
13142 | struct obstack obstack; | |
13143 | struct die_info *child_die = die->child; | |
13144 | int unsigned_enum = 1; | |
13145 | int flag_enum = 1; | |
13146 | ULONGEST mask = 0; | |
13147 | struct cleanup *old_chain; | |
13148 | ||
13149 | obstack_init (&obstack); | |
13150 | old_chain = make_cleanup_obstack_free (&obstack); | |
13151 | ||
13152 | while (child_die != NULL && child_die->tag) | |
13153 | { | |
13154 | struct attribute *attr; | |
13155 | LONGEST value; | |
13156 | const gdb_byte *bytes; | |
13157 | struct dwarf2_locexpr_baton *baton; | |
13158 | const char *name; | |
13159 | if (child_die->tag != DW_TAG_enumerator) | |
13160 | continue; | |
13161 | ||
13162 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13163 | if (attr == NULL) | |
13164 | continue; | |
13165 | ||
13166 | name = dwarf2_name (child_die, cu); | |
13167 | if (name == NULL) | |
13168 | name = "<anonymous enumerator>"; | |
13169 | ||
13170 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13171 | &value, &bytes, &baton); | |
13172 | if (value < 0) | |
13173 | { | |
13174 | unsigned_enum = 0; | |
13175 | flag_enum = 0; | |
13176 | } | |
13177 | else if ((mask & value) != 0) | |
13178 | flag_enum = 0; | |
13179 | else | |
13180 | mask |= value; | |
13181 | ||
13182 | /* If we already know that the enum type is neither unsigned, nor | |
13183 | a flag type, no need to look at the rest of the enumerates. */ | |
13184 | if (!unsigned_enum && !flag_enum) | |
13185 | break; | |
13186 | child_die = sibling_die (child_die); | |
13187 | } | |
13188 | ||
13189 | if (unsigned_enum) | |
13190 | TYPE_UNSIGNED (type) = 1; | |
13191 | if (flag_enum) | |
13192 | TYPE_FLAG_ENUM (type) = 1; | |
13193 | ||
13194 | do_cleanups (old_chain); | |
13195 | } | |
13196 | ||
134d01f1 DJ |
13197 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
13198 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 13199 | |
f792889a | 13200 | static struct type * |
134d01f1 | 13201 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13202 | { |
e7c27a73 | 13203 | struct objfile *objfile = cu->objfile; |
c906108c | 13204 | struct type *type; |
c906108c | 13205 | struct attribute *attr; |
0114d602 | 13206 | const char *name; |
134d01f1 | 13207 | |
348e048f DE |
13208 | /* If the definition of this type lives in .debug_types, read that type. |
13209 | Don't follow DW_AT_specification though, that will take us back up | |
13210 | the chain and we want to go down. */ | |
45e58e77 | 13211 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13212 | if (attr) |
13213 | { | |
ac9ec31b | 13214 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13215 | |
ac9ec31b | 13216 | /* The type's CU may not be the same as CU. |
02142a6c | 13217 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13218 | return set_die_type (die, type, cu); |
13219 | } | |
13220 | ||
c906108c SS |
13221 | type = alloc_type (objfile); |
13222 | ||
13223 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 13224 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 13225 | if (name != NULL) |
7d455152 | 13226 | TYPE_TAG_NAME (type) = name; |
c906108c | 13227 | |
e142c38c | 13228 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13229 | if (attr) |
13230 | { | |
13231 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13232 | } | |
13233 | else | |
13234 | { | |
13235 | TYPE_LENGTH (type) = 0; | |
13236 | } | |
13237 | ||
137033e9 JB |
13238 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
13239 | declared as private in the package spec, and then defined only | |
13240 | inside the package body. Such types are known as Taft Amendment | |
13241 | Types. When another package uses such a type, an incomplete DIE | |
13242 | may be generated by the compiler. */ | |
02eb380e | 13243 | if (die_is_declaration (die, cu)) |
876cecd0 | 13244 | TYPE_STUB (type) = 1; |
02eb380e | 13245 | |
55426c9d JB |
13246 | /* Finish the creation of this type by using the enum's children. */ |
13247 | update_enumeration_type_from_children (die, type, cu); | |
13248 | ||
f792889a | 13249 | return set_die_type (die, type, cu); |
134d01f1 DJ |
13250 | } |
13251 | ||
13252 | /* Given a pointer to a die which begins an enumeration, process all | |
13253 | the dies that define the members of the enumeration, and create the | |
13254 | symbol for the enumeration type. | |
13255 | ||
13256 | NOTE: We reverse the order of the element list. */ | |
13257 | ||
13258 | static void | |
13259 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13260 | { | |
f792889a | 13261 | struct type *this_type; |
134d01f1 | 13262 | |
f792889a DJ |
13263 | this_type = get_die_type (die, cu); |
13264 | if (this_type == NULL) | |
13265 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 13266 | |
639d11d3 | 13267 | if (die->child != NULL) |
c906108c | 13268 | { |
9dc481d3 DE |
13269 | struct die_info *child_die; |
13270 | struct symbol *sym; | |
13271 | struct field *fields = NULL; | |
13272 | int num_fields = 0; | |
15d034d0 | 13273 | const char *name; |
9dc481d3 | 13274 | |
639d11d3 | 13275 | child_die = die->child; |
c906108c SS |
13276 | while (child_die && child_die->tag) |
13277 | { | |
13278 | if (child_die->tag != DW_TAG_enumerator) | |
13279 | { | |
e7c27a73 | 13280 | process_die (child_die, cu); |
c906108c SS |
13281 | } |
13282 | else | |
13283 | { | |
39cbfefa DJ |
13284 | name = dwarf2_name (child_die, cu); |
13285 | if (name) | |
c906108c | 13286 | { |
f792889a | 13287 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
13288 | |
13289 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13290 | { | |
13291 | fields = (struct field *) | |
13292 | xrealloc (fields, | |
13293 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13294 | * sizeof (struct field)); |
c906108c SS |
13295 | } |
13296 | ||
3567439c | 13297 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 13298 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 13299 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
13300 | FIELD_BITSIZE (fields[num_fields]) = 0; |
13301 | ||
13302 | num_fields++; | |
13303 | } | |
13304 | } | |
13305 | ||
13306 | child_die = sibling_die (child_die); | |
13307 | } | |
13308 | ||
13309 | if (num_fields) | |
13310 | { | |
f792889a DJ |
13311 | TYPE_NFIELDS (this_type) = num_fields; |
13312 | TYPE_FIELDS (this_type) = (struct field *) | |
13313 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
13314 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 13315 | sizeof (struct field) * num_fields); |
b8c9b27d | 13316 | xfree (fields); |
c906108c | 13317 | } |
c906108c | 13318 | } |
134d01f1 | 13319 | |
6c83ed52 TT |
13320 | /* If we are reading an enum from a .debug_types unit, and the enum |
13321 | is a declaration, and the enum is not the signatured type in the | |
13322 | unit, then we do not want to add a symbol for it. Adding a | |
13323 | symbol would in some cases obscure the true definition of the | |
13324 | enum, giving users an incomplete type when the definition is | |
13325 | actually available. Note that we do not want to do this for all | |
13326 | enums which are just declarations, because C++0x allows forward | |
13327 | enum declarations. */ | |
3019eac3 | 13328 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
13329 | && die_is_declaration (die, cu)) |
13330 | { | |
52dc124a | 13331 | struct signatured_type *sig_type; |
6c83ed52 | 13332 | |
c0f78cd4 | 13333 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
13334 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
13335 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
13336 | return; |
13337 | } | |
13338 | ||
f792889a | 13339 | new_symbol (die, this_type, cu); |
c906108c SS |
13340 | } |
13341 | ||
13342 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
13343 | the DIE's type field. For now, this only handles one dimensional | |
13344 | arrays. */ | |
13345 | ||
f792889a | 13346 | static struct type * |
e7c27a73 | 13347 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13348 | { |
e7c27a73 | 13349 | struct objfile *objfile = cu->objfile; |
c906108c | 13350 | struct die_info *child_die; |
7e314c57 | 13351 | struct type *type; |
c906108c SS |
13352 | struct type *element_type, *range_type, *index_type; |
13353 | struct type **range_types = NULL; | |
13354 | struct attribute *attr; | |
13355 | int ndim = 0; | |
13356 | struct cleanup *back_to; | |
15d034d0 | 13357 | const char *name; |
dc53a7ad | 13358 | unsigned int bit_stride = 0; |
c906108c | 13359 | |
e7c27a73 | 13360 | element_type = die_type (die, cu); |
c906108c | 13361 | |
7e314c57 JK |
13362 | /* The die_type call above may have already set the type for this DIE. */ |
13363 | type = get_die_type (die, cu); | |
13364 | if (type) | |
13365 | return type; | |
13366 | ||
dc53a7ad JB |
13367 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
13368 | if (attr != NULL) | |
13369 | bit_stride = DW_UNSND (attr) * 8; | |
13370 | ||
13371 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
13372 | if (attr != NULL) | |
13373 | bit_stride = DW_UNSND (attr); | |
13374 | ||
c906108c SS |
13375 | /* Irix 6.2 native cc creates array types without children for |
13376 | arrays with unspecified length. */ | |
639d11d3 | 13377 | if (die->child == NULL) |
c906108c | 13378 | { |
46bf5051 | 13379 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 13380 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
13381 | type = create_array_type_with_stride (NULL, element_type, range_type, |
13382 | bit_stride); | |
f792889a | 13383 | return set_die_type (die, type, cu); |
c906108c SS |
13384 | } |
13385 | ||
13386 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 13387 | child_die = die->child; |
c906108c SS |
13388 | while (child_die && child_die->tag) |
13389 | { | |
13390 | if (child_die->tag == DW_TAG_subrange_type) | |
13391 | { | |
f792889a | 13392 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 13393 | |
f792889a | 13394 | if (child_type != NULL) |
a02abb62 | 13395 | { |
0963b4bd MS |
13396 | /* The range type was succesfully read. Save it for the |
13397 | array type creation. */ | |
a02abb62 JB |
13398 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
13399 | { | |
13400 | range_types = (struct type **) | |
13401 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
13402 | * sizeof (struct type *)); | |
13403 | if (ndim == 0) | |
13404 | make_cleanup (free_current_contents, &range_types); | |
13405 | } | |
f792889a | 13406 | range_types[ndim++] = child_type; |
a02abb62 | 13407 | } |
c906108c SS |
13408 | } |
13409 | child_die = sibling_die (child_die); | |
13410 | } | |
13411 | ||
13412 | /* Dwarf2 dimensions are output from left to right, create the | |
13413 | necessary array types in backwards order. */ | |
7ca2d3a3 | 13414 | |
c906108c | 13415 | type = element_type; |
7ca2d3a3 DL |
13416 | |
13417 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
13418 | { | |
13419 | int i = 0; | |
9a619af0 | 13420 | |
7ca2d3a3 | 13421 | while (i < ndim) |
dc53a7ad JB |
13422 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
13423 | bit_stride); | |
7ca2d3a3 DL |
13424 | } |
13425 | else | |
13426 | { | |
13427 | while (ndim-- > 0) | |
dc53a7ad JB |
13428 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
13429 | bit_stride); | |
7ca2d3a3 | 13430 | } |
c906108c | 13431 | |
f5f8a009 EZ |
13432 | /* Understand Dwarf2 support for vector types (like they occur on |
13433 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
13434 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
13435 | custom vendor extension. The main difference between a regular | |
13436 | array and the vector variant is that vectors are passed by value | |
13437 | to functions. */ | |
e142c38c | 13438 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 13439 | if (attr) |
ea37ba09 | 13440 | make_vector_type (type); |
f5f8a009 | 13441 | |
dbc98a8b KW |
13442 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
13443 | implementation may choose to implement triple vectors using this | |
13444 | attribute. */ | |
13445 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
13446 | if (attr) | |
13447 | { | |
13448 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
13449 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13450 | else | |
3e43a32a MS |
13451 | complaint (&symfile_complaints, |
13452 | _("DW_AT_byte_size for array type smaller " | |
13453 | "than the total size of elements")); | |
dbc98a8b KW |
13454 | } |
13455 | ||
39cbfefa DJ |
13456 | name = dwarf2_name (die, cu); |
13457 | if (name) | |
13458 | TYPE_NAME (type) = name; | |
6e70227d | 13459 | |
0963b4bd | 13460 | /* Install the type in the die. */ |
7e314c57 JK |
13461 | set_die_type (die, type, cu); |
13462 | ||
13463 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13464 | set_descriptive_type (type, die, cu); |
13465 | ||
c906108c SS |
13466 | do_cleanups (back_to); |
13467 | ||
7e314c57 | 13468 | return type; |
c906108c SS |
13469 | } |
13470 | ||
7ca2d3a3 | 13471 | static enum dwarf_array_dim_ordering |
6e70227d | 13472 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
13473 | { |
13474 | struct attribute *attr; | |
13475 | ||
13476 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
13477 | ||
13478 | if (attr) return DW_SND (attr); | |
13479 | ||
0963b4bd MS |
13480 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
13481 | opposite order to the dwarf2 specification, but data is still | |
13482 | laid out as per normal fortran. | |
7ca2d3a3 | 13483 | |
0963b4bd MS |
13484 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
13485 | version checking. */ | |
7ca2d3a3 | 13486 | |
905e0470 PM |
13487 | if (cu->language == language_fortran |
13488 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
13489 | { |
13490 | return DW_ORD_row_major; | |
13491 | } | |
13492 | ||
6e70227d | 13493 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
13494 | { |
13495 | case array_column_major: | |
13496 | return DW_ORD_col_major; | |
13497 | case array_row_major: | |
13498 | default: | |
13499 | return DW_ORD_row_major; | |
13500 | }; | |
13501 | } | |
13502 | ||
72019c9c | 13503 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 13504 | the DIE's type field. */ |
72019c9c | 13505 | |
f792889a | 13506 | static struct type * |
72019c9c GM |
13507 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
13508 | { | |
7e314c57 JK |
13509 | struct type *domain_type, *set_type; |
13510 | struct attribute *attr; | |
f792889a | 13511 | |
7e314c57 JK |
13512 | domain_type = die_type (die, cu); |
13513 | ||
13514 | /* The die_type call above may have already set the type for this DIE. */ | |
13515 | set_type = get_die_type (die, cu); | |
13516 | if (set_type) | |
13517 | return set_type; | |
13518 | ||
13519 | set_type = create_set_type (NULL, domain_type); | |
13520 | ||
13521 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
13522 | if (attr) |
13523 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 13524 | |
f792889a | 13525 | return set_die_type (die, set_type, cu); |
72019c9c | 13526 | } |
7ca2d3a3 | 13527 | |
0971de02 TT |
13528 | /* A helper for read_common_block that creates a locexpr baton. |
13529 | SYM is the symbol which we are marking as computed. | |
13530 | COMMON_DIE is the DIE for the common block. | |
13531 | COMMON_LOC is the location expression attribute for the common | |
13532 | block itself. | |
13533 | MEMBER_LOC is the location expression attribute for the particular | |
13534 | member of the common block that we are processing. | |
13535 | CU is the CU from which the above come. */ | |
13536 | ||
13537 | static void | |
13538 | mark_common_block_symbol_computed (struct symbol *sym, | |
13539 | struct die_info *common_die, | |
13540 | struct attribute *common_loc, | |
13541 | struct attribute *member_loc, | |
13542 | struct dwarf2_cu *cu) | |
13543 | { | |
13544 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13545 | struct dwarf2_locexpr_baton *baton; | |
13546 | gdb_byte *ptr; | |
13547 | unsigned int cu_off; | |
13548 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
13549 | LONGEST offset = 0; | |
13550 | ||
13551 | gdb_assert (common_loc && member_loc); | |
13552 | gdb_assert (attr_form_is_block (common_loc)); | |
13553 | gdb_assert (attr_form_is_block (member_loc) | |
13554 | || attr_form_is_constant (member_loc)); | |
13555 | ||
13556 | baton = obstack_alloc (&objfile->objfile_obstack, | |
13557 | sizeof (struct dwarf2_locexpr_baton)); | |
13558 | baton->per_cu = cu->per_cu; | |
13559 | gdb_assert (baton->per_cu); | |
13560 | ||
13561 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
13562 | ||
13563 | if (attr_form_is_constant (member_loc)) | |
13564 | { | |
13565 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
13566 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
13567 | } | |
13568 | else | |
13569 | baton->size += DW_BLOCK (member_loc)->size; | |
13570 | ||
13571 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
13572 | baton->data = ptr; | |
13573 | ||
13574 | *ptr++ = DW_OP_call4; | |
13575 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
13576 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
13577 | ptr += 4; | |
13578 | ||
13579 | if (attr_form_is_constant (member_loc)) | |
13580 | { | |
13581 | *ptr++ = DW_OP_addr; | |
13582 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
13583 | ptr += cu->header.addr_size; | |
13584 | } | |
13585 | else | |
13586 | { | |
13587 | /* We have to copy the data here, because DW_OP_call4 will only | |
13588 | use a DW_AT_location attribute. */ | |
13589 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
13590 | ptr += DW_BLOCK (member_loc)->size; | |
13591 | } | |
13592 | ||
13593 | *ptr++ = DW_OP_plus; | |
13594 | gdb_assert (ptr - baton->data == baton->size); | |
13595 | ||
0971de02 | 13596 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 13597 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
13598 | } |
13599 | ||
4357ac6c TT |
13600 | /* Create appropriate locally-scoped variables for all the |
13601 | DW_TAG_common_block entries. Also create a struct common_block | |
13602 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
13603 | is used to sepate the common blocks name namespace from regular | |
13604 | variable names. */ | |
c906108c SS |
13605 | |
13606 | static void | |
e7c27a73 | 13607 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13608 | { |
0971de02 TT |
13609 | struct attribute *attr; |
13610 | ||
13611 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
13612 | if (attr) | |
13613 | { | |
13614 | /* Support the .debug_loc offsets. */ | |
13615 | if (attr_form_is_block (attr)) | |
13616 | { | |
13617 | /* Ok. */ | |
13618 | } | |
13619 | else if (attr_form_is_section_offset (attr)) | |
13620 | { | |
13621 | dwarf2_complex_location_expr_complaint (); | |
13622 | attr = NULL; | |
13623 | } | |
13624 | else | |
13625 | { | |
13626 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
13627 | "common block member"); | |
13628 | attr = NULL; | |
13629 | } | |
13630 | } | |
13631 | ||
639d11d3 | 13632 | if (die->child != NULL) |
c906108c | 13633 | { |
4357ac6c TT |
13634 | struct objfile *objfile = cu->objfile; |
13635 | struct die_info *child_die; | |
13636 | size_t n_entries = 0, size; | |
13637 | struct common_block *common_block; | |
13638 | struct symbol *sym; | |
74ac6d43 | 13639 | |
4357ac6c TT |
13640 | for (child_die = die->child; |
13641 | child_die && child_die->tag; | |
13642 | child_die = sibling_die (child_die)) | |
13643 | ++n_entries; | |
13644 | ||
13645 | size = (sizeof (struct common_block) | |
13646 | + (n_entries - 1) * sizeof (struct symbol *)); | |
13647 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
13648 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
13649 | common_block->n_entries = 0; | |
13650 | ||
13651 | for (child_die = die->child; | |
13652 | child_die && child_die->tag; | |
13653 | child_die = sibling_die (child_die)) | |
13654 | { | |
13655 | /* Create the symbol in the DW_TAG_common_block block in the current | |
13656 | symbol scope. */ | |
e7c27a73 | 13657 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
13658 | if (sym != NULL) |
13659 | { | |
13660 | struct attribute *member_loc; | |
13661 | ||
13662 | common_block->contents[common_block->n_entries++] = sym; | |
13663 | ||
13664 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
13665 | cu); | |
13666 | if (member_loc) | |
13667 | { | |
13668 | /* GDB has handled this for a long time, but it is | |
13669 | not specified by DWARF. It seems to have been | |
13670 | emitted by gfortran at least as recently as: | |
13671 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
13672 | complaint (&symfile_complaints, | |
13673 | _("Variable in common block has " | |
13674 | "DW_AT_data_member_location " | |
13675 | "- DIE at 0x%x [in module %s]"), | |
4262abfb JK |
13676 | child_die->offset.sect_off, |
13677 | objfile_name (cu->objfile)); | |
0971de02 TT |
13678 | |
13679 | if (attr_form_is_section_offset (member_loc)) | |
13680 | dwarf2_complex_location_expr_complaint (); | |
13681 | else if (attr_form_is_constant (member_loc) | |
13682 | || attr_form_is_block (member_loc)) | |
13683 | { | |
13684 | if (attr) | |
13685 | mark_common_block_symbol_computed (sym, die, attr, | |
13686 | member_loc, cu); | |
13687 | } | |
13688 | else | |
13689 | dwarf2_complex_location_expr_complaint (); | |
13690 | } | |
13691 | } | |
c906108c | 13692 | } |
4357ac6c TT |
13693 | |
13694 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
13695 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
13696 | } |
13697 | } | |
13698 | ||
0114d602 | 13699 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 13700 | |
0114d602 DJ |
13701 | static struct type * |
13702 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 13703 | { |
e7c27a73 | 13704 | struct objfile *objfile = cu->objfile; |
0114d602 | 13705 | const char *previous_prefix, *name; |
9219021c | 13706 | int is_anonymous; |
0114d602 DJ |
13707 | struct type *type; |
13708 | ||
13709 | /* For extensions, reuse the type of the original namespace. */ | |
13710 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
13711 | { | |
13712 | struct die_info *ext_die; | |
13713 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 13714 | |
0114d602 DJ |
13715 | ext_die = dwarf2_extension (die, &ext_cu); |
13716 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
13717 | |
13718 | /* EXT_CU may not be the same as CU. | |
02142a6c | 13719 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
13720 | return set_die_type (die, type, cu); |
13721 | } | |
9219021c | 13722 | |
e142c38c | 13723 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
13724 | |
13725 | /* Now build the name of the current namespace. */ | |
13726 | ||
0114d602 DJ |
13727 | previous_prefix = determine_prefix (die, cu); |
13728 | if (previous_prefix[0] != '\0') | |
13729 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 13730 | previous_prefix, name, 0, cu); |
0114d602 DJ |
13731 | |
13732 | /* Create the type. */ | |
13733 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
13734 | objfile); | |
abee88f2 | 13735 | TYPE_NAME (type) = name; |
0114d602 DJ |
13736 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
13737 | ||
60531b24 | 13738 | return set_die_type (die, type, cu); |
0114d602 DJ |
13739 | } |
13740 | ||
13741 | /* Read a C++ namespace. */ | |
13742 | ||
13743 | static void | |
13744 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
13745 | { | |
13746 | struct objfile *objfile = cu->objfile; | |
0114d602 | 13747 | int is_anonymous; |
9219021c | 13748 | |
5c4e30ca DC |
13749 | /* Add a symbol associated to this if we haven't seen the namespace |
13750 | before. Also, add a using directive if it's an anonymous | |
13751 | namespace. */ | |
9219021c | 13752 | |
f2f0e013 | 13753 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
13754 | { |
13755 | struct type *type; | |
13756 | ||
0114d602 | 13757 | type = read_type_die (die, cu); |
e7c27a73 | 13758 | new_symbol (die, type, cu); |
5c4e30ca | 13759 | |
e8e80198 | 13760 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 13761 | if (is_anonymous) |
0114d602 DJ |
13762 | { |
13763 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 13764 | |
c0cc3a76 | 13765 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
12aaed36 | 13766 | NULL, NULL, 0, &objfile->objfile_obstack); |
0114d602 | 13767 | } |
5c4e30ca | 13768 | } |
9219021c | 13769 | |
639d11d3 | 13770 | if (die->child != NULL) |
d9fa45fe | 13771 | { |
639d11d3 | 13772 | struct die_info *child_die = die->child; |
6e70227d | 13773 | |
d9fa45fe DC |
13774 | while (child_die && child_die->tag) |
13775 | { | |
e7c27a73 | 13776 | process_die (child_die, cu); |
d9fa45fe DC |
13777 | child_die = sibling_die (child_die); |
13778 | } | |
13779 | } | |
38d518c9 EZ |
13780 | } |
13781 | ||
f55ee35c JK |
13782 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
13783 | imported module. Still we need that type as local Fortran "use ... only" | |
13784 | declaration imports depend on the created type in determine_prefix. */ | |
13785 | ||
13786 | static struct type * | |
13787 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
13788 | { | |
13789 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 13790 | const char *module_name; |
f55ee35c JK |
13791 | struct type *type; |
13792 | ||
13793 | module_name = dwarf2_name (die, cu); | |
13794 | if (!module_name) | |
3e43a32a MS |
13795 | complaint (&symfile_complaints, |
13796 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 13797 | die->offset.sect_off); |
f55ee35c JK |
13798 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
13799 | ||
13800 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
13801 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
13802 | ||
13803 | return set_die_type (die, type, cu); | |
13804 | } | |
13805 | ||
5d7cb8df JK |
13806 | /* Read a Fortran module. */ |
13807 | ||
13808 | static void | |
13809 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
13810 | { | |
13811 | struct die_info *child_die = die->child; | |
530e8392 KB |
13812 | struct type *type; |
13813 | ||
13814 | type = read_type_die (die, cu); | |
13815 | new_symbol (die, type, cu); | |
5d7cb8df | 13816 | |
5d7cb8df JK |
13817 | while (child_die && child_die->tag) |
13818 | { | |
13819 | process_die (child_die, cu); | |
13820 | child_die = sibling_die (child_die); | |
13821 | } | |
13822 | } | |
13823 | ||
38d518c9 EZ |
13824 | /* Return the name of the namespace represented by DIE. Set |
13825 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
13826 | namespace. */ | |
13827 | ||
13828 | static const char * | |
e142c38c | 13829 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
13830 | { |
13831 | struct die_info *current_die; | |
13832 | const char *name = NULL; | |
13833 | ||
13834 | /* Loop through the extensions until we find a name. */ | |
13835 | ||
13836 | for (current_die = die; | |
13837 | current_die != NULL; | |
f2f0e013 | 13838 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 13839 | { |
e142c38c | 13840 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
13841 | if (name != NULL) |
13842 | break; | |
13843 | } | |
13844 | ||
13845 | /* Is it an anonymous namespace? */ | |
13846 | ||
13847 | *is_anonymous = (name == NULL); | |
13848 | if (*is_anonymous) | |
2b1dbab0 | 13849 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
13850 | |
13851 | return name; | |
d9fa45fe DC |
13852 | } |
13853 | ||
c906108c SS |
13854 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
13855 | the user defined type vector. */ | |
13856 | ||
f792889a | 13857 | static struct type * |
e7c27a73 | 13858 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13859 | { |
5e2b427d | 13860 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 13861 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 13862 | struct type *type; |
8b2dbe47 KB |
13863 | struct attribute *attr_byte_size; |
13864 | struct attribute *attr_address_class; | |
13865 | int byte_size, addr_class; | |
7e314c57 JK |
13866 | struct type *target_type; |
13867 | ||
13868 | target_type = die_type (die, cu); | |
c906108c | 13869 | |
7e314c57 JK |
13870 | /* The die_type call above may have already set the type for this DIE. */ |
13871 | type = get_die_type (die, cu); | |
13872 | if (type) | |
13873 | return type; | |
13874 | ||
13875 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 13876 | |
e142c38c | 13877 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
13878 | if (attr_byte_size) |
13879 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 13880 | else |
8b2dbe47 KB |
13881 | byte_size = cu_header->addr_size; |
13882 | ||
e142c38c | 13883 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
13884 | if (attr_address_class) |
13885 | addr_class = DW_UNSND (attr_address_class); | |
13886 | else | |
13887 | addr_class = DW_ADDR_none; | |
13888 | ||
13889 | /* If the pointer size or address class is different than the | |
13890 | default, create a type variant marked as such and set the | |
13891 | length accordingly. */ | |
13892 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 13893 | { |
5e2b427d | 13894 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
13895 | { |
13896 | int type_flags; | |
13897 | ||
849957d9 | 13898 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 13899 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
13900 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
13901 | == 0); | |
8b2dbe47 KB |
13902 | type = make_type_with_address_space (type, type_flags); |
13903 | } | |
13904 | else if (TYPE_LENGTH (type) != byte_size) | |
13905 | { | |
3e43a32a MS |
13906 | complaint (&symfile_complaints, |
13907 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 13908 | } |
6e70227d | 13909 | else |
9a619af0 MS |
13910 | { |
13911 | /* Should we also complain about unhandled address classes? */ | |
13912 | } | |
c906108c | 13913 | } |
8b2dbe47 KB |
13914 | |
13915 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 13916 | return set_die_type (die, type, cu); |
c906108c SS |
13917 | } |
13918 | ||
13919 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
13920 | the user defined type vector. */ | |
13921 | ||
f792889a | 13922 | static struct type * |
e7c27a73 | 13923 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
13924 | { |
13925 | struct type *type; | |
13926 | struct type *to_type; | |
13927 | struct type *domain; | |
13928 | ||
e7c27a73 DJ |
13929 | to_type = die_type (die, cu); |
13930 | domain = die_containing_type (die, cu); | |
0d5de010 | 13931 | |
7e314c57 JK |
13932 | /* The calls above may have already set the type for this DIE. */ |
13933 | type = get_die_type (die, cu); | |
13934 | if (type) | |
13935 | return type; | |
13936 | ||
0d5de010 DJ |
13937 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
13938 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
13939 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
13940 | { | |
13941 | struct type *new_type = alloc_type (cu->objfile); | |
13942 | ||
13943 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
13944 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
13945 | TYPE_VARARGS (to_type)); | |
13946 | type = lookup_methodptr_type (new_type); | |
13947 | } | |
0d5de010 DJ |
13948 | else |
13949 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 13950 | |
f792889a | 13951 | return set_die_type (die, type, cu); |
c906108c SS |
13952 | } |
13953 | ||
13954 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
13955 | the user defined type vector. */ | |
13956 | ||
f792889a | 13957 | static struct type * |
e7c27a73 | 13958 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13959 | { |
e7c27a73 | 13960 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 13961 | struct type *type, *target_type; |
c906108c SS |
13962 | struct attribute *attr; |
13963 | ||
7e314c57 JK |
13964 | target_type = die_type (die, cu); |
13965 | ||
13966 | /* The die_type call above may have already set the type for this DIE. */ | |
13967 | type = get_die_type (die, cu); | |
13968 | if (type) | |
13969 | return type; | |
13970 | ||
13971 | type = lookup_reference_type (target_type); | |
e142c38c | 13972 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13973 | if (attr) |
13974 | { | |
13975 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13976 | } | |
13977 | else | |
13978 | { | |
107d2387 | 13979 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 13980 | } |
f792889a | 13981 | return set_die_type (die, type, cu); |
c906108c SS |
13982 | } |
13983 | ||
f792889a | 13984 | static struct type * |
e7c27a73 | 13985 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13986 | { |
f792889a | 13987 | struct type *base_type, *cv_type; |
c906108c | 13988 | |
e7c27a73 | 13989 | base_type = die_type (die, cu); |
7e314c57 JK |
13990 | |
13991 | /* The die_type call above may have already set the type for this DIE. */ | |
13992 | cv_type = get_die_type (die, cu); | |
13993 | if (cv_type) | |
13994 | return cv_type; | |
13995 | ||
2f608a3a KW |
13996 | /* In case the const qualifier is applied to an array type, the element type |
13997 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
13998 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
13999 | { | |
14000 | struct type *el_type, *inner_array; | |
14001 | ||
14002 | base_type = copy_type (base_type); | |
14003 | inner_array = base_type; | |
14004 | ||
14005 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14006 | { | |
14007 | TYPE_TARGET_TYPE (inner_array) = | |
14008 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14009 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14010 | } | |
14011 | ||
14012 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14013 | TYPE_TARGET_TYPE (inner_array) = | |
14014 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
14015 | ||
14016 | return set_die_type (die, base_type, cu); | |
14017 | } | |
14018 | ||
f792889a DJ |
14019 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14020 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14021 | } |
14022 | ||
f792889a | 14023 | static struct type * |
e7c27a73 | 14024 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14025 | { |
f792889a | 14026 | struct type *base_type, *cv_type; |
c906108c | 14027 | |
e7c27a73 | 14028 | base_type = die_type (die, cu); |
7e314c57 JK |
14029 | |
14030 | /* The die_type call above may have already set the type for this DIE. */ | |
14031 | cv_type = get_die_type (die, cu); | |
14032 | if (cv_type) | |
14033 | return cv_type; | |
14034 | ||
f792889a DJ |
14035 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14036 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14037 | } |
14038 | ||
06d66ee9 TT |
14039 | /* Handle DW_TAG_restrict_type. */ |
14040 | ||
14041 | static struct type * | |
14042 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14043 | { | |
14044 | struct type *base_type, *cv_type; | |
14045 | ||
14046 | base_type = die_type (die, cu); | |
14047 | ||
14048 | /* The die_type call above may have already set the type for this DIE. */ | |
14049 | cv_type = get_die_type (die, cu); | |
14050 | if (cv_type) | |
14051 | return cv_type; | |
14052 | ||
14053 | cv_type = make_restrict_type (base_type); | |
14054 | return set_die_type (die, cv_type, cu); | |
14055 | } | |
14056 | ||
c906108c SS |
14057 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14058 | the user defined type vector. It isn't really a user defined type, | |
14059 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14060 | attribute to reference it. */ | |
14061 | ||
f792889a | 14062 | static struct type * |
e7c27a73 | 14063 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14064 | { |
e7c27a73 | 14065 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14066 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14067 | struct type *type, *range_type, *index_type, *char_type; |
14068 | struct attribute *attr; | |
14069 | unsigned int length; | |
14070 | ||
e142c38c | 14071 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14072 | if (attr) |
14073 | { | |
14074 | length = DW_UNSND (attr); | |
14075 | } | |
14076 | else | |
14077 | { | |
0963b4bd | 14078 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14079 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14080 | if (attr) |
14081 | { | |
14082 | length = DW_UNSND (attr); | |
14083 | } | |
14084 | else | |
14085 | { | |
14086 | length = 1; | |
14087 | } | |
c906108c | 14088 | } |
6ccb9162 | 14089 | |
46bf5051 | 14090 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14091 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14092 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14093 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14094 | |
f792889a | 14095 | return set_die_type (die, type, cu); |
c906108c SS |
14096 | } |
14097 | ||
4d804846 JB |
14098 | /* Assuming that DIE corresponds to a function, returns nonzero |
14099 | if the function is prototyped. */ | |
14100 | ||
14101 | static int | |
14102 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14103 | { | |
14104 | struct attribute *attr; | |
14105 | ||
14106 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14107 | if (attr && (DW_UNSND (attr) != 0)) | |
14108 | return 1; | |
14109 | ||
14110 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14111 | is only meaninful for C, but the concept also extends to other | |
14112 | languages that allow unprototyped functions (Eg: Objective C). | |
14113 | For all other languages, assume that functions are always | |
14114 | prototyped. */ | |
14115 | if (cu->language != language_c | |
14116 | && cu->language != language_objc | |
14117 | && cu->language != language_opencl) | |
14118 | return 1; | |
14119 | ||
14120 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14121 | prototyped and unprototyped functions; default to prototyped, | |
14122 | since that is more common in modern code (and RealView warns | |
14123 | about unprototyped functions). */ | |
14124 | if (producer_is_realview (cu->producer)) | |
14125 | return 1; | |
14126 | ||
14127 | return 0; | |
14128 | } | |
14129 | ||
c906108c SS |
14130 | /* Handle DIES due to C code like: |
14131 | ||
14132 | struct foo | |
c5aa993b JM |
14133 | { |
14134 | int (*funcp)(int a, long l); | |
14135 | int b; | |
14136 | }; | |
c906108c | 14137 | |
0963b4bd | 14138 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14139 | |
f792889a | 14140 | static struct type * |
e7c27a73 | 14141 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14142 | { |
bb5ed363 | 14143 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14144 | struct type *type; /* Type that this function returns. */ |
14145 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14146 | struct attribute *attr; |
14147 | ||
e7c27a73 | 14148 | type = die_type (die, cu); |
7e314c57 JK |
14149 | |
14150 | /* The die_type call above may have already set the type for this DIE. */ | |
14151 | ftype = get_die_type (die, cu); | |
14152 | if (ftype) | |
14153 | return ftype; | |
14154 | ||
0c8b41f1 | 14155 | ftype = lookup_function_type (type); |
c906108c | 14156 | |
4d804846 | 14157 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 14158 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 14159 | |
c055b101 CV |
14160 | /* Store the calling convention in the type if it's available in |
14161 | the subroutine die. Otherwise set the calling convention to | |
14162 | the default value DW_CC_normal. */ | |
14163 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
14164 | if (attr) |
14165 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
14166 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
14167 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
14168 | else | |
14169 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
14170 | |
14171 | /* We need to add the subroutine type to the die immediately so | |
14172 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 14173 | declared as the same subroutine type. */ |
76c10ea2 | 14174 | set_die_type (die, ftype, cu); |
6e70227d | 14175 | |
639d11d3 | 14176 | if (die->child != NULL) |
c906108c | 14177 | { |
bb5ed363 | 14178 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 14179 | struct die_info *child_die; |
8072405b | 14180 | int nparams, iparams; |
c906108c SS |
14181 | |
14182 | /* Count the number of parameters. | |
14183 | FIXME: GDB currently ignores vararg functions, but knows about | |
14184 | vararg member functions. */ | |
8072405b | 14185 | nparams = 0; |
639d11d3 | 14186 | child_die = die->child; |
c906108c SS |
14187 | while (child_die && child_die->tag) |
14188 | { | |
14189 | if (child_die->tag == DW_TAG_formal_parameter) | |
14190 | nparams++; | |
14191 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 14192 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
14193 | child_die = sibling_die (child_die); |
14194 | } | |
14195 | ||
14196 | /* Allocate storage for parameters and fill them in. */ | |
14197 | TYPE_NFIELDS (ftype) = nparams; | |
14198 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 14199 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 14200 | |
8072405b JK |
14201 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
14202 | even if we error out during the parameters reading below. */ | |
14203 | for (iparams = 0; iparams < nparams; iparams++) | |
14204 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
14205 | ||
14206 | iparams = 0; | |
639d11d3 | 14207 | child_die = die->child; |
c906108c SS |
14208 | while (child_die && child_die->tag) |
14209 | { | |
14210 | if (child_die->tag == DW_TAG_formal_parameter) | |
14211 | { | |
3ce3b1ba PA |
14212 | struct type *arg_type; |
14213 | ||
14214 | /* DWARF version 2 has no clean way to discern C++ | |
14215 | static and non-static member functions. G++ helps | |
14216 | GDB by marking the first parameter for non-static | |
14217 | member functions (which is the this pointer) as | |
14218 | artificial. We pass this information to | |
14219 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
14220 | ||
14221 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
14222 | 4.5 does not yet generate. */ | |
e142c38c | 14223 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
14224 | if (attr) |
14225 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
14226 | else | |
418835cc KS |
14227 | { |
14228 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
14229 | ||
14230 | /* GCC/43521: In java, the formal parameter | |
14231 | "this" is sometimes not marked with DW_AT_artificial. */ | |
14232 | if (cu->language == language_java) | |
14233 | { | |
14234 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 14235 | |
418835cc KS |
14236 | if (name && !strcmp (name, "this")) |
14237 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
14238 | } | |
14239 | } | |
3ce3b1ba PA |
14240 | arg_type = die_type (child_die, cu); |
14241 | ||
14242 | /* RealView does not mark THIS as const, which the testsuite | |
14243 | expects. GCC marks THIS as const in method definitions, | |
14244 | but not in the class specifications (GCC PR 43053). */ | |
14245 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
14246 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
14247 | { | |
14248 | int is_this = 0; | |
14249 | struct dwarf2_cu *arg_cu = cu; | |
14250 | const char *name = dwarf2_name (child_die, cu); | |
14251 | ||
14252 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
14253 | if (attr) | |
14254 | { | |
14255 | /* If the compiler emits this, use it. */ | |
14256 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
14257 | is_this = 1; | |
14258 | } | |
14259 | else if (name && strcmp (name, "this") == 0) | |
14260 | /* Function definitions will have the argument names. */ | |
14261 | is_this = 1; | |
14262 | else if (name == NULL && iparams == 0) | |
14263 | /* Declarations may not have the names, so like | |
14264 | elsewhere in GDB, assume an artificial first | |
14265 | argument is "this". */ | |
14266 | is_this = 1; | |
14267 | ||
14268 | if (is_this) | |
14269 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
14270 | arg_type, 0); | |
14271 | } | |
14272 | ||
14273 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
14274 | iparams++; |
14275 | } | |
14276 | child_die = sibling_die (child_die); | |
14277 | } | |
14278 | } | |
14279 | ||
76c10ea2 | 14280 | return ftype; |
c906108c SS |
14281 | } |
14282 | ||
f792889a | 14283 | static struct type * |
e7c27a73 | 14284 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14285 | { |
e7c27a73 | 14286 | struct objfile *objfile = cu->objfile; |
0114d602 | 14287 | const char *name = NULL; |
3c8e0968 | 14288 | struct type *this_type, *target_type; |
c906108c | 14289 | |
94af9270 | 14290 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 14291 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 14292 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 14293 | TYPE_NAME (this_type) = name; |
f792889a | 14294 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
14295 | target_type = die_type (die, cu); |
14296 | if (target_type != this_type) | |
14297 | TYPE_TARGET_TYPE (this_type) = target_type; | |
14298 | else | |
14299 | { | |
14300 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
14301 | spec and cause infinite loops in GDB. */ | |
14302 | complaint (&symfile_complaints, | |
14303 | _("Self-referential DW_TAG_typedef " | |
14304 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14305 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
14306 | TYPE_TARGET_TYPE (this_type) = NULL; |
14307 | } | |
f792889a | 14308 | return this_type; |
c906108c SS |
14309 | } |
14310 | ||
14311 | /* Find a representation of a given base type and install | |
14312 | it in the TYPE field of the die. */ | |
14313 | ||
f792889a | 14314 | static struct type * |
e7c27a73 | 14315 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14316 | { |
e7c27a73 | 14317 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14318 | struct type *type; |
14319 | struct attribute *attr; | |
14320 | int encoding = 0, size = 0; | |
15d034d0 | 14321 | const char *name; |
6ccb9162 UW |
14322 | enum type_code code = TYPE_CODE_INT; |
14323 | int type_flags = 0; | |
14324 | struct type *target_type = NULL; | |
c906108c | 14325 | |
e142c38c | 14326 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
14327 | if (attr) |
14328 | { | |
14329 | encoding = DW_UNSND (attr); | |
14330 | } | |
e142c38c | 14331 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14332 | if (attr) |
14333 | { | |
14334 | size = DW_UNSND (attr); | |
14335 | } | |
39cbfefa | 14336 | name = dwarf2_name (die, cu); |
6ccb9162 | 14337 | if (!name) |
c906108c | 14338 | { |
6ccb9162 UW |
14339 | complaint (&symfile_complaints, |
14340 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 14341 | } |
6ccb9162 UW |
14342 | |
14343 | switch (encoding) | |
c906108c | 14344 | { |
6ccb9162 UW |
14345 | case DW_ATE_address: |
14346 | /* Turn DW_ATE_address into a void * pointer. */ | |
14347 | code = TYPE_CODE_PTR; | |
14348 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14349 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
14350 | break; | |
14351 | case DW_ATE_boolean: | |
14352 | code = TYPE_CODE_BOOL; | |
14353 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14354 | break; | |
14355 | case DW_ATE_complex_float: | |
14356 | code = TYPE_CODE_COMPLEX; | |
14357 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
14358 | break; | |
14359 | case DW_ATE_decimal_float: | |
14360 | code = TYPE_CODE_DECFLOAT; | |
14361 | break; | |
14362 | case DW_ATE_float: | |
14363 | code = TYPE_CODE_FLT; | |
14364 | break; | |
14365 | case DW_ATE_signed: | |
14366 | break; | |
14367 | case DW_ATE_unsigned: | |
14368 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
14369 | if (cu->language == language_fortran |
14370 | && name | |
14371 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
14372 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
14373 | break; |
14374 | case DW_ATE_signed_char: | |
6e70227d | 14375 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14376 | || cu->language == language_pascal |
14377 | || cu->language == language_fortran) | |
6ccb9162 UW |
14378 | code = TYPE_CODE_CHAR; |
14379 | break; | |
14380 | case DW_ATE_unsigned_char: | |
868a0084 | 14381 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14382 | || cu->language == language_pascal |
14383 | || cu->language == language_fortran) | |
6ccb9162 UW |
14384 | code = TYPE_CODE_CHAR; |
14385 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14386 | break; | |
75079b2b TT |
14387 | case DW_ATE_UTF: |
14388 | /* We just treat this as an integer and then recognize the | |
14389 | type by name elsewhere. */ | |
14390 | break; | |
14391 | ||
6ccb9162 UW |
14392 | default: |
14393 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
14394 | dwarf_type_encoding_name (encoding)); | |
14395 | break; | |
c906108c | 14396 | } |
6ccb9162 | 14397 | |
0114d602 DJ |
14398 | type = init_type (code, size, type_flags, NULL, objfile); |
14399 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
14400 | TYPE_TARGET_TYPE (type) = target_type; |
14401 | ||
0114d602 | 14402 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 14403 | TYPE_NOSIGN (type) = 1; |
0114d602 | 14404 | |
f792889a | 14405 | return set_die_type (die, type, cu); |
c906108c SS |
14406 | } |
14407 | ||
80180f79 SA |
14408 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
14409 | resulting value of the attribute into struct bound_prop. | |
14410 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
14411 | ||
14412 | static int | |
14413 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
14414 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
14415 | { | |
14416 | struct dwarf2_property_baton *baton; | |
14417 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
14418 | ||
14419 | if (attr == NULL || prop == NULL) | |
14420 | return 0; | |
14421 | ||
14422 | if (attr_form_is_block (attr)) | |
14423 | { | |
14424 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14425 | baton->referenced_type = NULL; | |
14426 | baton->locexpr.per_cu = cu->per_cu; | |
14427 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
14428 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
14429 | prop->data.baton = baton; | |
14430 | prop->kind = PROP_LOCEXPR; | |
14431 | gdb_assert (prop->data.baton != NULL); | |
14432 | } | |
14433 | else if (attr_form_is_ref (attr)) | |
14434 | { | |
14435 | struct dwarf2_cu *target_cu = cu; | |
14436 | struct die_info *target_die; | |
14437 | struct attribute *target_attr; | |
14438 | ||
14439 | target_die = follow_die_ref (die, attr, &target_cu); | |
14440 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
14441 | if (target_attr == NULL) | |
14442 | return 0; | |
14443 | ||
14444 | if (attr_form_is_section_offset (target_attr)) | |
14445 | { | |
14446 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14447 | baton->referenced_type = die_type (target_die, target_cu); | |
14448 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
14449 | prop->data.baton = baton; | |
14450 | prop->kind = PROP_LOCLIST; | |
14451 | gdb_assert (prop->data.baton != NULL); | |
14452 | } | |
14453 | else if (attr_form_is_block (target_attr)) | |
14454 | { | |
14455 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14456 | baton->referenced_type = die_type (target_die, target_cu); | |
14457 | baton->locexpr.per_cu = cu->per_cu; | |
14458 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
14459 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
14460 | prop->data.baton = baton; | |
14461 | prop->kind = PROP_LOCEXPR; | |
14462 | gdb_assert (prop->data.baton != NULL); | |
14463 | } | |
14464 | else | |
14465 | { | |
14466 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14467 | "dynamic property"); | |
14468 | return 0; | |
14469 | } | |
14470 | } | |
14471 | else if (attr_form_is_constant (attr)) | |
14472 | { | |
14473 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
14474 | prop->kind = PROP_CONST; | |
14475 | } | |
14476 | else | |
14477 | { | |
14478 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
14479 | dwarf2_name (die, cu)); | |
14480 | return 0; | |
14481 | } | |
14482 | ||
14483 | return 1; | |
14484 | } | |
14485 | ||
a02abb62 JB |
14486 | /* Read the given DW_AT_subrange DIE. */ |
14487 | ||
f792889a | 14488 | static struct type * |
a02abb62 JB |
14489 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
14490 | { | |
4c9ad8c2 | 14491 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
14492 | struct type *range_type; |
14493 | struct attribute *attr; | |
729efb13 | 14494 | struct dynamic_prop low, high; |
4fae6e18 | 14495 | int low_default_is_valid; |
15d034d0 | 14496 | const char *name; |
43bbcdc2 | 14497 | LONGEST negative_mask; |
e77813c8 | 14498 | |
4c9ad8c2 TT |
14499 | orig_base_type = die_type (die, cu); |
14500 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
14501 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
14502 | creating the range type, but we use the result of check_typedef | |
14503 | when examining properties of the type. */ | |
14504 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 14505 | |
7e314c57 JK |
14506 | /* The die_type call above may have already set the type for this DIE. */ |
14507 | range_type = get_die_type (die, cu); | |
14508 | if (range_type) | |
14509 | return range_type; | |
14510 | ||
729efb13 SA |
14511 | low.kind = PROP_CONST; |
14512 | high.kind = PROP_CONST; | |
14513 | high.data.const_val = 0; | |
14514 | ||
4fae6e18 JK |
14515 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
14516 | omitting DW_AT_lower_bound. */ | |
14517 | switch (cu->language) | |
6e70227d | 14518 | { |
4fae6e18 JK |
14519 | case language_c: |
14520 | case language_cplus: | |
729efb13 | 14521 | low.data.const_val = 0; |
4fae6e18 JK |
14522 | low_default_is_valid = 1; |
14523 | break; | |
14524 | case language_fortran: | |
729efb13 | 14525 | low.data.const_val = 1; |
4fae6e18 JK |
14526 | low_default_is_valid = 1; |
14527 | break; | |
14528 | case language_d: | |
14529 | case language_java: | |
14530 | case language_objc: | |
729efb13 | 14531 | low.data.const_val = 0; |
4fae6e18 JK |
14532 | low_default_is_valid = (cu->header.version >= 4); |
14533 | break; | |
14534 | case language_ada: | |
14535 | case language_m2: | |
14536 | case language_pascal: | |
729efb13 | 14537 | low.data.const_val = 1; |
4fae6e18 JK |
14538 | low_default_is_valid = (cu->header.version >= 4); |
14539 | break; | |
14540 | default: | |
729efb13 | 14541 | low.data.const_val = 0; |
4fae6e18 JK |
14542 | low_default_is_valid = 0; |
14543 | break; | |
a02abb62 JB |
14544 | } |
14545 | ||
dd5e6932 DJ |
14546 | /* FIXME: For variable sized arrays either of these could be |
14547 | a variable rather than a constant value. We'll allow it, | |
14548 | but we don't know how to handle it. */ | |
e142c38c | 14549 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 14550 | if (attr) |
729efb13 SA |
14551 | low.data.const_val |
14552 | = dwarf2_get_attr_constant_value (attr, low.data.const_val); | |
4fae6e18 JK |
14553 | else if (!low_default_is_valid) |
14554 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
14555 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14556 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 14557 | |
e142c38c | 14558 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 14559 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
14560 | { |
14561 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
6b662e19 | 14562 | if (attr) |
c2ff108b | 14563 | { |
6b662e19 JB |
14564 | int count = dwarf2_get_attr_constant_value (attr, 1); |
14565 | high.data.const_val = low.data.const_val + count - 1; | |
14566 | } | |
14567 | else | |
14568 | { | |
14569 | /* Unspecified array length. */ | |
14570 | high.data.const_val = low.data.const_val - 1; | |
c2ff108b | 14571 | } |
e77813c8 PM |
14572 | } |
14573 | ||
14574 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
14575 | without specifying a base type. | |
14576 | In that case, the base type must be set to the type of | |
14577 | the lower bound, upper bound or count, in that order, if any of these | |
14578 | three attributes references an object that has a type. | |
14579 | If no base type is found, the Dwarf-2 specifications say that | |
14580 | a signed integer type of size equal to the size of an address should | |
14581 | be used. | |
14582 | For the following C code: `extern char gdb_int [];' | |
14583 | GCC produces an empty range DIE. | |
14584 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 14585 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
14586 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
14587 | { | |
14588 | struct objfile *objfile = cu->objfile; | |
14589 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
14590 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
14591 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
14592 | ||
14593 | /* Test "int", "long int", and "long long int" objfile types, | |
14594 | and select the first one having a size above or equal to the | |
14595 | architecture address size. */ | |
14596 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14597 | base_type = int_type; | |
14598 | else | |
14599 | { | |
14600 | int_type = objfile_type (objfile)->builtin_long; | |
14601 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14602 | base_type = int_type; | |
14603 | else | |
14604 | { | |
14605 | int_type = objfile_type (objfile)->builtin_long_long; | |
14606 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14607 | base_type = int_type; | |
14608 | } | |
14609 | } | |
14610 | } | |
a02abb62 | 14611 | |
dbb9c2b1 JB |
14612 | /* Normally, the DWARF producers are expected to use a signed |
14613 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
14614 | But this is unfortunately not always the case, as witnessed | |
14615 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
14616 | is used instead. To work around that ambiguity, we treat | |
14617 | the bounds as signed, and thus sign-extend their values, when | |
14618 | the base type is signed. */ | |
6e70227d | 14619 | negative_mask = |
43bbcdc2 | 14620 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
729efb13 SA |
14621 | if (low.kind == PROP_CONST |
14622 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
14623 | low.data.const_val |= negative_mask; | |
14624 | if (high.kind == PROP_CONST | |
14625 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
14626 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 14627 | |
729efb13 | 14628 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 14629 | |
c2ff108b JK |
14630 | /* Ada expects an empty array on no boundary attributes. */ |
14631 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 14632 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 14633 | |
39cbfefa DJ |
14634 | name = dwarf2_name (die, cu); |
14635 | if (name) | |
14636 | TYPE_NAME (range_type) = name; | |
6e70227d | 14637 | |
e142c38c | 14638 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
14639 | if (attr) |
14640 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
14641 | ||
7e314c57 JK |
14642 | set_die_type (die, range_type, cu); |
14643 | ||
14644 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14645 | set_descriptive_type (range_type, die, cu); |
14646 | ||
7e314c57 | 14647 | return range_type; |
a02abb62 | 14648 | } |
6e70227d | 14649 | |
f792889a | 14650 | static struct type * |
81a17f79 JB |
14651 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
14652 | { | |
14653 | struct type *type; | |
81a17f79 | 14654 | |
81a17f79 JB |
14655 | /* For now, we only support the C meaning of an unspecified type: void. */ |
14656 | ||
0114d602 DJ |
14657 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
14658 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 14659 | |
f792889a | 14660 | return set_die_type (die, type, cu); |
81a17f79 | 14661 | } |
a02abb62 | 14662 | |
639d11d3 DC |
14663 | /* Read a single die and all its descendents. Set the die's sibling |
14664 | field to NULL; set other fields in the die correctly, and set all | |
14665 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
14666 | location of the info_ptr after reading all of those dies. PARENT | |
14667 | is the parent of the die in question. */ | |
14668 | ||
14669 | static struct die_info * | |
dee91e82 | 14670 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
14671 | const gdb_byte *info_ptr, |
14672 | const gdb_byte **new_info_ptr, | |
dee91e82 | 14673 | struct die_info *parent) |
639d11d3 DC |
14674 | { |
14675 | struct die_info *die; | |
d521ce57 | 14676 | const gdb_byte *cur_ptr; |
639d11d3 DC |
14677 | int has_children; |
14678 | ||
bf6af496 | 14679 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
14680 | if (die == NULL) |
14681 | { | |
14682 | *new_info_ptr = cur_ptr; | |
14683 | return NULL; | |
14684 | } | |
93311388 | 14685 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
14686 | |
14687 | if (has_children) | |
bf6af496 | 14688 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
14689 | else |
14690 | { | |
14691 | die->child = NULL; | |
14692 | *new_info_ptr = cur_ptr; | |
14693 | } | |
14694 | ||
14695 | die->sibling = NULL; | |
14696 | die->parent = parent; | |
14697 | return die; | |
14698 | } | |
14699 | ||
14700 | /* Read a die, all of its descendents, and all of its siblings; set | |
14701 | all of the fields of all of the dies correctly. Arguments are as | |
14702 | in read_die_and_children. */ | |
14703 | ||
14704 | static struct die_info * | |
bf6af496 | 14705 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
14706 | const gdb_byte *info_ptr, |
14707 | const gdb_byte **new_info_ptr, | |
bf6af496 | 14708 | struct die_info *parent) |
639d11d3 DC |
14709 | { |
14710 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 14711 | const gdb_byte *cur_ptr; |
639d11d3 | 14712 | |
c906108c | 14713 | cur_ptr = info_ptr; |
639d11d3 DC |
14714 | first_die = last_sibling = NULL; |
14715 | ||
14716 | while (1) | |
c906108c | 14717 | { |
639d11d3 | 14718 | struct die_info *die |
dee91e82 | 14719 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 14720 | |
1d325ec1 | 14721 | if (die == NULL) |
c906108c | 14722 | { |
639d11d3 DC |
14723 | *new_info_ptr = cur_ptr; |
14724 | return first_die; | |
c906108c | 14725 | } |
1d325ec1 DJ |
14726 | |
14727 | if (!first_die) | |
14728 | first_die = die; | |
c906108c | 14729 | else |
1d325ec1 DJ |
14730 | last_sibling->sibling = die; |
14731 | ||
14732 | last_sibling = die; | |
c906108c | 14733 | } |
c906108c SS |
14734 | } |
14735 | ||
bf6af496 DE |
14736 | /* Read a die, all of its descendents, and all of its siblings; set |
14737 | all of the fields of all of the dies correctly. Arguments are as | |
14738 | in read_die_and_children. | |
14739 | This the main entry point for reading a DIE and all its children. */ | |
14740 | ||
14741 | static struct die_info * | |
14742 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
14743 | const gdb_byte *info_ptr, |
14744 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
14745 | struct die_info *parent) |
14746 | { | |
14747 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
14748 | new_info_ptr, parent); | |
14749 | ||
14750 | if (dwarf2_die_debug) | |
14751 | { | |
14752 | fprintf_unfiltered (gdb_stdlog, | |
14753 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 14754 | get_section_name (reader->die_section), |
bf6af496 DE |
14755 | (unsigned) (info_ptr - reader->die_section->buffer), |
14756 | bfd_get_filename (reader->abfd)); | |
14757 | dump_die (die, dwarf2_die_debug); | |
14758 | } | |
14759 | ||
14760 | return die; | |
14761 | } | |
14762 | ||
3019eac3 DE |
14763 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
14764 | attributes. | |
14765 | The caller is responsible for filling in the extra attributes | |
14766 | and updating (*DIEP)->num_attrs. | |
14767 | Set DIEP to point to a newly allocated die with its information, | |
14768 | except for its child, sibling, and parent fields. | |
14769 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 14770 | |
d521ce57 | 14771 | static const gdb_byte * |
3019eac3 | 14772 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 14773 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 14774 | int *has_children, int num_extra_attrs) |
93311388 | 14775 | { |
b64f50a1 JK |
14776 | unsigned int abbrev_number, bytes_read, i; |
14777 | sect_offset offset; | |
93311388 DE |
14778 | struct abbrev_info *abbrev; |
14779 | struct die_info *die; | |
14780 | struct dwarf2_cu *cu = reader->cu; | |
14781 | bfd *abfd = reader->abfd; | |
14782 | ||
b64f50a1 | 14783 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
14784 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14785 | info_ptr += bytes_read; | |
14786 | if (!abbrev_number) | |
14787 | { | |
14788 | *diep = NULL; | |
14789 | *has_children = 0; | |
14790 | return info_ptr; | |
14791 | } | |
14792 | ||
433df2d4 | 14793 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 14794 | if (!abbrev) |
348e048f DE |
14795 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
14796 | abbrev_number, | |
14797 | bfd_get_filename (abfd)); | |
14798 | ||
3019eac3 | 14799 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
14800 | die->offset = offset; |
14801 | die->tag = abbrev->tag; | |
14802 | die->abbrev = abbrev_number; | |
14803 | ||
3019eac3 DE |
14804 | /* Make the result usable. |
14805 | The caller needs to update num_attrs after adding the extra | |
14806 | attributes. */ | |
93311388 DE |
14807 | die->num_attrs = abbrev->num_attrs; |
14808 | ||
14809 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
14810 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
14811 | info_ptr); | |
93311388 DE |
14812 | |
14813 | *diep = die; | |
14814 | *has_children = abbrev->has_children; | |
14815 | return info_ptr; | |
14816 | } | |
14817 | ||
3019eac3 DE |
14818 | /* Read a die and all its attributes. |
14819 | Set DIEP to point to a newly allocated die with its information, | |
14820 | except for its child, sibling, and parent fields. | |
14821 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
14822 | ||
d521ce57 | 14823 | static const gdb_byte * |
3019eac3 | 14824 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 14825 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
14826 | int *has_children) |
14827 | { | |
d521ce57 | 14828 | const gdb_byte *result; |
bf6af496 DE |
14829 | |
14830 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
14831 | ||
14832 | if (dwarf2_die_debug) | |
14833 | { | |
14834 | fprintf_unfiltered (gdb_stdlog, | |
14835 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 14836 | get_section_name (reader->die_section), |
bf6af496 DE |
14837 | (unsigned) (info_ptr - reader->die_section->buffer), |
14838 | bfd_get_filename (reader->abfd)); | |
14839 | dump_die (*diep, dwarf2_die_debug); | |
14840 | } | |
14841 | ||
14842 | return result; | |
3019eac3 | 14843 | } |
433df2d4 DE |
14844 | \f |
14845 | /* Abbreviation tables. | |
3019eac3 | 14846 | |
433df2d4 | 14847 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
14848 | stored in a separate .debug_abbrev section. Before we read any |
14849 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
14850 | in a hash table. */ |
14851 | ||
14852 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
14853 | ||
14854 | static struct abbrev_info * | |
14855 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
14856 | { | |
14857 | struct abbrev_info *abbrev; | |
14858 | ||
14859 | abbrev = (struct abbrev_info *) | |
14860 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
14861 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
14862 | return abbrev; | |
14863 | } | |
14864 | ||
14865 | /* Add an abbreviation to the table. */ | |
c906108c SS |
14866 | |
14867 | static void | |
433df2d4 DE |
14868 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
14869 | unsigned int abbrev_number, | |
14870 | struct abbrev_info *abbrev) | |
14871 | { | |
14872 | unsigned int hash_number; | |
14873 | ||
14874 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
14875 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
14876 | abbrev_table->abbrevs[hash_number] = abbrev; | |
14877 | } | |
dee91e82 | 14878 | |
433df2d4 DE |
14879 | /* Look up an abbrev in the table. |
14880 | Returns NULL if the abbrev is not found. */ | |
14881 | ||
14882 | static struct abbrev_info * | |
14883 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
14884 | unsigned int abbrev_number) | |
c906108c | 14885 | { |
433df2d4 DE |
14886 | unsigned int hash_number; |
14887 | struct abbrev_info *abbrev; | |
14888 | ||
14889 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
14890 | abbrev = abbrev_table->abbrevs[hash_number]; | |
14891 | ||
14892 | while (abbrev) | |
14893 | { | |
14894 | if (abbrev->number == abbrev_number) | |
14895 | return abbrev; | |
14896 | abbrev = abbrev->next; | |
14897 | } | |
14898 | return NULL; | |
14899 | } | |
14900 | ||
14901 | /* Read in an abbrev table. */ | |
14902 | ||
14903 | static struct abbrev_table * | |
14904 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
14905 | sect_offset offset) | |
14906 | { | |
14907 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 14908 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 14909 | struct abbrev_table *abbrev_table; |
d521ce57 | 14910 | const gdb_byte *abbrev_ptr; |
c906108c SS |
14911 | struct abbrev_info *cur_abbrev; |
14912 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 14913 | unsigned int abbrev_form; |
f3dd6933 DJ |
14914 | struct attr_abbrev *cur_attrs; |
14915 | unsigned int allocated_attrs; | |
c906108c | 14916 | |
70ba0933 | 14917 | abbrev_table = XNEW (struct abbrev_table); |
f4dc4d17 | 14918 | abbrev_table->offset = offset; |
433df2d4 DE |
14919 | obstack_init (&abbrev_table->abbrev_obstack); |
14920 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
14921 | (ABBREV_HASH_SIZE | |
14922 | * sizeof (struct abbrev_info *))); | |
14923 | memset (abbrev_table->abbrevs, 0, | |
14924 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 14925 | |
433df2d4 DE |
14926 | dwarf2_read_section (objfile, section); |
14927 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
14928 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
14929 | abbrev_ptr += bytes_read; | |
14930 | ||
f3dd6933 DJ |
14931 | allocated_attrs = ATTR_ALLOC_CHUNK; |
14932 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 14933 | |
0963b4bd | 14934 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
14935 | while (abbrev_number) |
14936 | { | |
433df2d4 | 14937 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
14938 | |
14939 | /* read in abbrev header */ | |
14940 | cur_abbrev->number = abbrev_number; | |
14941 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14942 | abbrev_ptr += bytes_read; | |
14943 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
14944 | abbrev_ptr += 1; | |
14945 | ||
14946 | /* now read in declarations */ | |
14947 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14948 | abbrev_ptr += bytes_read; | |
14949 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14950 | abbrev_ptr += bytes_read; | |
14951 | while (abbrev_name) | |
14952 | { | |
f3dd6933 | 14953 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 14954 | { |
f3dd6933 DJ |
14955 | allocated_attrs += ATTR_ALLOC_CHUNK; |
14956 | cur_attrs | |
14957 | = xrealloc (cur_attrs, (allocated_attrs | |
14958 | * sizeof (struct attr_abbrev))); | |
c906108c | 14959 | } |
ae038cb0 | 14960 | |
f3dd6933 DJ |
14961 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
14962 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
14963 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
14964 | abbrev_ptr += bytes_read; | |
14965 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14966 | abbrev_ptr += bytes_read; | |
14967 | } | |
14968 | ||
433df2d4 | 14969 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
14970 | (cur_abbrev->num_attrs |
14971 | * sizeof (struct attr_abbrev))); | |
14972 | memcpy (cur_abbrev->attrs, cur_attrs, | |
14973 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
14974 | ||
433df2d4 | 14975 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
14976 | |
14977 | /* Get next abbreviation. | |
14978 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
14979 | always properly terminated with an abbrev number of 0. |
14980 | Exit loop if we encounter an abbreviation which we have | |
14981 | already read (which means we are about to read the abbreviations | |
14982 | for the next compile unit) or if the end of the abbreviation | |
14983 | table is reached. */ | |
433df2d4 | 14984 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
14985 | break; |
14986 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14987 | abbrev_ptr += bytes_read; | |
433df2d4 | 14988 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
14989 | break; |
14990 | } | |
f3dd6933 DJ |
14991 | |
14992 | xfree (cur_attrs); | |
433df2d4 | 14993 | return abbrev_table; |
c906108c SS |
14994 | } |
14995 | ||
433df2d4 | 14996 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 14997 | |
c906108c | 14998 | static void |
433df2d4 | 14999 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15000 | { |
433df2d4 DE |
15001 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15002 | xfree (abbrev_table); | |
c906108c SS |
15003 | } |
15004 | ||
f4dc4d17 DE |
15005 | /* Same as abbrev_table_free but as a cleanup. |
15006 | We pass in a pointer to the pointer to the table so that we can | |
15007 | set the pointer to NULL when we're done. It also simplifies | |
15008 | build_type_unit_groups. */ | |
15009 | ||
15010 | static void | |
15011 | abbrev_table_free_cleanup (void *table_ptr) | |
15012 | { | |
15013 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
15014 | ||
15015 | if (*abbrev_table_ptr != NULL) | |
15016 | abbrev_table_free (*abbrev_table_ptr); | |
15017 | *abbrev_table_ptr = NULL; | |
15018 | } | |
15019 | ||
433df2d4 DE |
15020 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15021 | ||
15022 | static void | |
15023 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15024 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15025 | { |
433df2d4 DE |
15026 | cu->abbrev_table = |
15027 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
15028 | } | |
c906108c | 15029 | |
433df2d4 | 15030 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15031 | |
433df2d4 DE |
15032 | static void |
15033 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15034 | { | |
15035 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 15036 | |
a2ce51a0 DE |
15037 | if (cu->abbrev_table != NULL) |
15038 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15039 | /* Set this to NULL so that we SEGV if we try to read it later, |
15040 | and also because free_comp_unit verifies this is NULL. */ | |
15041 | cu->abbrev_table = NULL; | |
15042 | } | |
15043 | \f | |
72bf9492 DJ |
15044 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15045 | symbol for. */ | |
15046 | ||
15047 | static int | |
15048 | is_type_tag_for_partial (int tag) | |
15049 | { | |
15050 | switch (tag) | |
15051 | { | |
15052 | #if 0 | |
15053 | /* Some types that would be reasonable to generate partial symbols for, | |
15054 | that we don't at present. */ | |
15055 | case DW_TAG_array_type: | |
15056 | case DW_TAG_file_type: | |
15057 | case DW_TAG_ptr_to_member_type: | |
15058 | case DW_TAG_set_type: | |
15059 | case DW_TAG_string_type: | |
15060 | case DW_TAG_subroutine_type: | |
15061 | #endif | |
15062 | case DW_TAG_base_type: | |
15063 | case DW_TAG_class_type: | |
680b30c7 | 15064 | case DW_TAG_interface_type: |
72bf9492 DJ |
15065 | case DW_TAG_enumeration_type: |
15066 | case DW_TAG_structure_type: | |
15067 | case DW_TAG_subrange_type: | |
15068 | case DW_TAG_typedef: | |
15069 | case DW_TAG_union_type: | |
15070 | return 1; | |
15071 | default: | |
15072 | return 0; | |
15073 | } | |
15074 | } | |
15075 | ||
15076 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15077 | ||
15078 | static struct partial_die_info * | |
dee91e82 | 15079 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15080 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15081 | { |
dee91e82 | 15082 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15083 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15084 | struct partial_die_info *part_die; |
15085 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15086 | struct abbrev_info *abbrev; | |
15087 | unsigned int bytes_read; | |
5afb4e99 | 15088 | unsigned int load_all = 0; |
72bf9492 DJ |
15089 | int nesting_level = 1; |
15090 | ||
15091 | parent_die = NULL; | |
15092 | last_die = NULL; | |
15093 | ||
7adf1e79 DE |
15094 | gdb_assert (cu->per_cu != NULL); |
15095 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
15096 | load_all = 1; |
15097 | ||
72bf9492 DJ |
15098 | cu->partial_dies |
15099 | = htab_create_alloc_ex (cu->header.length / 12, | |
15100 | partial_die_hash, | |
15101 | partial_die_eq, | |
15102 | NULL, | |
15103 | &cu->comp_unit_obstack, | |
15104 | hashtab_obstack_allocate, | |
15105 | dummy_obstack_deallocate); | |
15106 | ||
15107 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
15108 | sizeof (struct partial_die_info)); | |
15109 | ||
15110 | while (1) | |
15111 | { | |
15112 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
15113 | ||
15114 | /* A NULL abbrev means the end of a series of children. */ | |
15115 | if (abbrev == NULL) | |
15116 | { | |
15117 | if (--nesting_level == 0) | |
15118 | { | |
15119 | /* PART_DIE was probably the last thing allocated on the | |
15120 | comp_unit_obstack, so we could call obstack_free | |
15121 | here. We don't do that because the waste is small, | |
15122 | and will be cleaned up when we're done with this | |
15123 | compilation unit. This way, we're also more robust | |
15124 | against other users of the comp_unit_obstack. */ | |
15125 | return first_die; | |
15126 | } | |
15127 | info_ptr += bytes_read; | |
15128 | last_die = parent_die; | |
15129 | parent_die = parent_die->die_parent; | |
15130 | continue; | |
15131 | } | |
15132 | ||
98bfdba5 PA |
15133 | /* Check for template arguments. We never save these; if |
15134 | they're seen, we just mark the parent, and go on our way. */ | |
15135 | if (parent_die != NULL | |
15136 | && cu->language == language_cplus | |
15137 | && (abbrev->tag == DW_TAG_template_type_param | |
15138 | || abbrev->tag == DW_TAG_template_value_param)) | |
15139 | { | |
15140 | parent_die->has_template_arguments = 1; | |
15141 | ||
15142 | if (!load_all) | |
15143 | { | |
15144 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 15145 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15146 | continue; |
15147 | } | |
15148 | } | |
15149 | ||
0d99eb77 | 15150 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
15151 | Skip their other children. */ |
15152 | if (!load_all | |
15153 | && cu->language == language_cplus | |
15154 | && parent_die != NULL | |
15155 | && parent_die->tag == DW_TAG_subprogram) | |
15156 | { | |
dee91e82 | 15157 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15158 | continue; |
15159 | } | |
15160 | ||
5afb4e99 DJ |
15161 | /* Check whether this DIE is interesting enough to save. Normally |
15162 | we would not be interested in members here, but there may be | |
15163 | later variables referencing them via DW_AT_specification (for | |
15164 | static members). */ | |
15165 | if (!load_all | |
15166 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 15167 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
15168 | && abbrev->tag != DW_TAG_enumerator |
15169 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 15170 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 15171 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 15172 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 15173 | && abbrev->tag != DW_TAG_module |
95554aad | 15174 | && abbrev->tag != DW_TAG_member |
74921315 KS |
15175 | && abbrev->tag != DW_TAG_imported_unit |
15176 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
15177 | { |
15178 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15179 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
15180 | continue; |
15181 | } | |
15182 | ||
dee91e82 DE |
15183 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
15184 | info_ptr); | |
72bf9492 DJ |
15185 | |
15186 | /* This two-pass algorithm for processing partial symbols has a | |
15187 | high cost in cache pressure. Thus, handle some simple cases | |
15188 | here which cover the majority of C partial symbols. DIEs | |
15189 | which neither have specification tags in them, nor could have | |
15190 | specification tags elsewhere pointing at them, can simply be | |
15191 | processed and discarded. | |
15192 | ||
15193 | This segment is also optional; scan_partial_symbols and | |
15194 | add_partial_symbol will handle these DIEs if we chain | |
15195 | them in normally. When compilers which do not emit large | |
15196 | quantities of duplicate debug information are more common, | |
15197 | this code can probably be removed. */ | |
15198 | ||
15199 | /* Any complete simple types at the top level (pretty much all | |
15200 | of them, for a language without namespaces), can be processed | |
15201 | directly. */ | |
15202 | if (parent_die == NULL | |
15203 | && part_die->has_specification == 0 | |
15204 | && part_die->is_declaration == 0 | |
d8228535 | 15205 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
15206 | || part_die->tag == DW_TAG_base_type |
15207 | || part_die->tag == DW_TAG_subrange_type)) | |
15208 | { | |
15209 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 15210 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15211 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
15212 | &objfile->static_psymbols, |
15213 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 15214 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15215 | continue; |
15216 | } | |
15217 | ||
d8228535 JK |
15218 | /* The exception for DW_TAG_typedef with has_children above is |
15219 | a workaround of GCC PR debug/47510. In the case of this complaint | |
15220 | type_name_no_tag_or_error will error on such types later. | |
15221 | ||
15222 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
15223 | it could not find the child DIEs referenced later, this is checked | |
15224 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
15225 | ||
15226 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
15227 | complaint (&symfile_complaints, | |
15228 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
15229 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15230 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 15231 | |
72bf9492 DJ |
15232 | /* If we're at the second level, and we're an enumerator, and |
15233 | our parent has no specification (meaning possibly lives in a | |
15234 | namespace elsewhere), then we can add the partial symbol now | |
15235 | instead of queueing it. */ | |
15236 | if (part_die->tag == DW_TAG_enumerator | |
15237 | && parent_die != NULL | |
15238 | && parent_die->die_parent == NULL | |
15239 | && parent_die->tag == DW_TAG_enumeration_type | |
15240 | && parent_die->has_specification == 0) | |
15241 | { | |
15242 | if (part_die->name == NULL) | |
3e43a32a MS |
15243 | complaint (&symfile_complaints, |
15244 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 15245 | else if (building_psymtab) |
04a679b8 | 15246 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15247 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
15248 | (cu->language == language_cplus |
15249 | || cu->language == language_java) | |
bb5ed363 DE |
15250 | ? &objfile->global_psymbols |
15251 | : &objfile->static_psymbols, | |
15252 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 15253 | |
dee91e82 | 15254 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15255 | continue; |
15256 | } | |
15257 | ||
15258 | /* We'll save this DIE so link it in. */ | |
15259 | part_die->die_parent = parent_die; | |
15260 | part_die->die_sibling = NULL; | |
15261 | part_die->die_child = NULL; | |
15262 | ||
15263 | if (last_die && last_die == parent_die) | |
15264 | last_die->die_child = part_die; | |
15265 | else if (last_die) | |
15266 | last_die->die_sibling = part_die; | |
15267 | ||
15268 | last_die = part_die; | |
15269 | ||
15270 | if (first_die == NULL) | |
15271 | first_die = part_die; | |
15272 | ||
15273 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
15274 | find interesting need to be in the hash table, because we | |
15275 | also have the parent/sibling/child chains; only those that we | |
15276 | might refer to by offset later during partial symbol reading. | |
15277 | ||
15278 | For now this means things that might have be the target of a | |
15279 | DW_AT_specification, DW_AT_abstract_origin, or | |
15280 | DW_AT_extension. DW_AT_extension will refer only to | |
15281 | namespaces; DW_AT_abstract_origin refers to functions (and | |
15282 | many things under the function DIE, but we do not recurse | |
15283 | into function DIEs during partial symbol reading) and | |
15284 | possibly variables as well; DW_AT_specification refers to | |
15285 | declarations. Declarations ought to have the DW_AT_declaration | |
15286 | flag. It happens that GCC forgets to put it in sometimes, but | |
15287 | only for functions, not for types. | |
15288 | ||
15289 | Adding more things than necessary to the hash table is harmless | |
15290 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
15291 | wasted time in find_partial_die, when we reread the compilation |
15292 | unit with load_all_dies set. */ | |
72bf9492 | 15293 | |
5afb4e99 | 15294 | if (load_all |
72929c62 | 15295 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 15296 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
15297 | || abbrev->tag == DW_TAG_variable |
15298 | || abbrev->tag == DW_TAG_namespace | |
15299 | || part_die->is_declaration) | |
15300 | { | |
15301 | void **slot; | |
15302 | ||
15303 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 15304 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
15305 | *slot = part_die; |
15306 | } | |
15307 | ||
15308 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
15309 | sizeof (struct partial_die_info)); | |
15310 | ||
15311 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 15312 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
15313 | languages we have to, so that we can get at method physnames |
15314 | to infer fully qualified class names, for DW_AT_specification, | |
15315 | and for C++ template arguments. For C++, we also look one level | |
15316 | inside functions to find template arguments (if the name of the | |
15317 | function does not already contain the template arguments). | |
bc30ff58 JB |
15318 | |
15319 | For Ada, we need to scan the children of subprograms and lexical | |
15320 | blocks as well because Ada allows the definition of nested | |
15321 | entities that could be interesting for the debugger, such as | |
15322 | nested subprograms for instance. */ | |
72bf9492 | 15323 | if (last_die->has_children |
5afb4e99 DJ |
15324 | && (load_all |
15325 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 15326 | || last_die->tag == DW_TAG_module |
72bf9492 | 15327 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
15328 | || (cu->language == language_cplus |
15329 | && last_die->tag == DW_TAG_subprogram | |
15330 | && (last_die->name == NULL | |
15331 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
15332 | || (cu->language != language_c |
15333 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 15334 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 15335 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
15336 | || last_die->tag == DW_TAG_union_type)) |
15337 | || (cu->language == language_ada | |
15338 | && (last_die->tag == DW_TAG_subprogram | |
15339 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
15340 | { |
15341 | nesting_level++; | |
15342 | parent_die = last_die; | |
15343 | continue; | |
15344 | } | |
15345 | ||
15346 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15347 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
15348 | |
15349 | /* Back to the top, do it again. */ | |
15350 | } | |
15351 | } | |
15352 | ||
c906108c SS |
15353 | /* Read a minimal amount of information into the minimal die structure. */ |
15354 | ||
d521ce57 | 15355 | static const gdb_byte * |
dee91e82 DE |
15356 | read_partial_die (const struct die_reader_specs *reader, |
15357 | struct partial_die_info *part_die, | |
15358 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 15359 | const gdb_byte *info_ptr) |
c906108c | 15360 | { |
dee91e82 | 15361 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15362 | struct objfile *objfile = cu->objfile; |
d521ce57 | 15363 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 15364 | unsigned int i; |
c906108c | 15365 | struct attribute attr; |
c5aa993b | 15366 | int has_low_pc_attr = 0; |
c906108c | 15367 | int has_high_pc_attr = 0; |
91da1414 | 15368 | int high_pc_relative = 0; |
c906108c | 15369 | |
72bf9492 | 15370 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 15371 | |
b64f50a1 | 15372 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
15373 | |
15374 | info_ptr += abbrev_len; | |
15375 | ||
15376 | if (abbrev == NULL) | |
15377 | return info_ptr; | |
15378 | ||
c906108c SS |
15379 | part_die->tag = abbrev->tag; |
15380 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
15381 | |
15382 | for (i = 0; i < abbrev->num_attrs; ++i) | |
15383 | { | |
dee91e82 | 15384 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
15385 | |
15386 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 15387 | partial symbol table. */ |
c906108c SS |
15388 | switch (attr.name) |
15389 | { | |
15390 | case DW_AT_name: | |
71c25dea TT |
15391 | switch (part_die->tag) |
15392 | { | |
15393 | case DW_TAG_compile_unit: | |
95554aad | 15394 | case DW_TAG_partial_unit: |
348e048f | 15395 | case DW_TAG_type_unit: |
71c25dea TT |
15396 | /* Compilation units have a DW_AT_name that is a filename, not |
15397 | a source language identifier. */ | |
15398 | case DW_TAG_enumeration_type: | |
15399 | case DW_TAG_enumerator: | |
15400 | /* These tags always have simple identifiers already; no need | |
15401 | to canonicalize them. */ | |
15402 | part_die->name = DW_STRING (&attr); | |
15403 | break; | |
15404 | default: | |
15405 | part_die->name | |
15406 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 15407 | &objfile->objfile_obstack); |
71c25dea TT |
15408 | break; |
15409 | } | |
c906108c | 15410 | break; |
31ef98ae | 15411 | case DW_AT_linkage_name: |
c906108c | 15412 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
15413 | /* Note that both forms of linkage name might appear. We |
15414 | assume they will be the same, and we only store the last | |
15415 | one we see. */ | |
94af9270 KS |
15416 | if (cu->language == language_ada) |
15417 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 15418 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
15419 | break; |
15420 | case DW_AT_low_pc: | |
15421 | has_low_pc_attr = 1; | |
31aa7e4e | 15422 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
15423 | break; |
15424 | case DW_AT_high_pc: | |
15425 | has_high_pc_attr = 1; | |
31aa7e4e JB |
15426 | part_die->highpc = attr_value_as_address (&attr); |
15427 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
15428 | high_pc_relative = 1; | |
c906108c SS |
15429 | break; |
15430 | case DW_AT_location: | |
0963b4bd | 15431 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
15432 | if (attr_form_is_block (&attr)) |
15433 | { | |
95554aad | 15434 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 15435 | } |
3690dd37 | 15436 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 15437 | { |
4d3c2250 | 15438 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15439 | } |
15440 | else | |
15441 | { | |
4d3c2250 KB |
15442 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
15443 | "partial symbol information"); | |
8e19ed76 | 15444 | } |
c906108c | 15445 | break; |
c906108c SS |
15446 | case DW_AT_external: |
15447 | part_die->is_external = DW_UNSND (&attr); | |
15448 | break; | |
15449 | case DW_AT_declaration: | |
15450 | part_die->is_declaration = DW_UNSND (&attr); | |
15451 | break; | |
15452 | case DW_AT_type: | |
15453 | part_die->has_type = 1; | |
15454 | break; | |
15455 | case DW_AT_abstract_origin: | |
15456 | case DW_AT_specification: | |
72bf9492 DJ |
15457 | case DW_AT_extension: |
15458 | part_die->has_specification = 1; | |
c764a876 | 15459 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
15460 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
15461 | || cu->per_cu->is_dwz); | |
c906108c SS |
15462 | break; |
15463 | case DW_AT_sibling: | |
15464 | /* Ignore absolute siblings, they might point outside of | |
15465 | the current compile unit. */ | |
15466 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
15467 | complaint (&symfile_complaints, |
15468 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 15469 | else |
b9502d3f WN |
15470 | { |
15471 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
15472 | const gdb_byte *sibling_ptr = buffer + off; | |
15473 | ||
15474 | if (sibling_ptr < info_ptr) | |
15475 | complaint (&symfile_complaints, | |
15476 | _("DW_AT_sibling points backwards")); | |
15477 | else | |
15478 | part_die->sibling = sibling_ptr; | |
15479 | } | |
c906108c | 15480 | break; |
fa4028e9 JB |
15481 | case DW_AT_byte_size: |
15482 | part_die->has_byte_size = 1; | |
15483 | break; | |
68511cec CES |
15484 | case DW_AT_calling_convention: |
15485 | /* DWARF doesn't provide a way to identify a program's source-level | |
15486 | entry point. DW_AT_calling_convention attributes are only meant | |
15487 | to describe functions' calling conventions. | |
15488 | ||
15489 | However, because it's a necessary piece of information in | |
15490 | Fortran, and because DW_CC_program is the only piece of debugging | |
15491 | information whose definition refers to a 'main program' at all, | |
15492 | several compilers have begun marking Fortran main programs with | |
15493 | DW_CC_program --- even when those functions use the standard | |
15494 | calling conventions. | |
15495 | ||
15496 | So until DWARF specifies a way to provide this information and | |
15497 | compilers pick up the new representation, we'll support this | |
15498 | practice. */ | |
15499 | if (DW_UNSND (&attr) == DW_CC_program | |
15500 | && cu->language == language_fortran) | |
3d548a53 | 15501 | set_objfile_main_name (objfile, part_die->name, language_fortran); |
68511cec | 15502 | break; |
481860b3 GB |
15503 | case DW_AT_inline: |
15504 | if (DW_UNSND (&attr) == DW_INL_inlined | |
15505 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
15506 | part_die->may_be_inlined = 1; | |
15507 | break; | |
95554aad TT |
15508 | |
15509 | case DW_AT_import: | |
15510 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
15511 | { |
15512 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
15513 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
15514 | || cu->per_cu->is_dwz); | |
15515 | } | |
95554aad TT |
15516 | break; |
15517 | ||
c906108c SS |
15518 | default: |
15519 | break; | |
15520 | } | |
15521 | } | |
15522 | ||
91da1414 MW |
15523 | if (high_pc_relative) |
15524 | part_die->highpc += part_die->lowpc; | |
15525 | ||
9373cf26 JK |
15526 | if (has_low_pc_attr && has_high_pc_attr) |
15527 | { | |
15528 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
15529 | eliminate duplicate copies of functions and vtables and such. | |
15530 | The linker will arbitrarily choose one and discard the others. | |
15531 | The AT_*_pc values for such functions refer to local labels in | |
15532 | these sections. If the section from that file was discarded, the | |
15533 | labels are not in the output, so the relocs get a value of 0. | |
15534 | If this is a discarded function, mark the pc bounds as invalid, | |
15535 | so that GDB will ignore it. */ | |
15536 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15537 | { | |
bb5ed363 | 15538 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15539 | |
15540 | complaint (&symfile_complaints, | |
15541 | _("DW_AT_low_pc %s is zero " | |
15542 | "for DIE at 0x%x [in module %s]"), | |
15543 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 15544 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15545 | } |
15546 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
15547 | else if (part_die->lowpc >= part_die->highpc) | |
15548 | { | |
bb5ed363 | 15549 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15550 | |
15551 | complaint (&symfile_complaints, | |
15552 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
15553 | "for DIE at 0x%x [in module %s]"), | |
15554 | paddress (gdbarch, part_die->lowpc), | |
15555 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 15556 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15557 | } |
15558 | else | |
15559 | part_die->has_pc_info = 1; | |
15560 | } | |
85cbf3d3 | 15561 | |
c906108c SS |
15562 | return info_ptr; |
15563 | } | |
15564 | ||
72bf9492 DJ |
15565 | /* Find a cached partial DIE at OFFSET in CU. */ |
15566 | ||
15567 | static struct partial_die_info * | |
b64f50a1 | 15568 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
15569 | { |
15570 | struct partial_die_info *lookup_die = NULL; | |
15571 | struct partial_die_info part_die; | |
15572 | ||
15573 | part_die.offset = offset; | |
b64f50a1 JK |
15574 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
15575 | offset.sect_off); | |
72bf9492 | 15576 | |
72bf9492 DJ |
15577 | return lookup_die; |
15578 | } | |
15579 | ||
348e048f DE |
15580 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
15581 | except in the case of .debug_types DIEs which do not reference | |
15582 | outside their CU (they do however referencing other types via | |
55f1336d | 15583 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
15584 | |
15585 | static struct partial_die_info * | |
36586728 | 15586 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 15587 | { |
bb5ed363 | 15588 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
15589 | struct dwarf2_per_cu_data *per_cu = NULL; |
15590 | struct partial_die_info *pd = NULL; | |
72bf9492 | 15591 | |
36586728 TT |
15592 | if (offset_in_dwz == cu->per_cu->is_dwz |
15593 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
15594 | { |
15595 | pd = find_partial_die_in_comp_unit (offset, cu); | |
15596 | if (pd != NULL) | |
15597 | return pd; | |
0d99eb77 DE |
15598 | /* We missed recording what we needed. |
15599 | Load all dies and try again. */ | |
15600 | per_cu = cu->per_cu; | |
5afb4e99 | 15601 | } |
0d99eb77 DE |
15602 | else |
15603 | { | |
15604 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 15605 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
15606 | { |
15607 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
15608 | " external reference to offset 0x%lx [in module %s].\n"), | |
15609 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
15610 | bfd_get_filename (objfile->obfd)); | |
15611 | } | |
36586728 TT |
15612 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
15613 | objfile); | |
72bf9492 | 15614 | |
0d99eb77 DE |
15615 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
15616 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 15617 | |
0d99eb77 DE |
15618 | per_cu->cu->last_used = 0; |
15619 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
15620 | } | |
5afb4e99 | 15621 | |
dee91e82 DE |
15622 | /* If we didn't find it, and not all dies have been loaded, |
15623 | load them all and try again. */ | |
15624 | ||
5afb4e99 DJ |
15625 | if (pd == NULL && per_cu->load_all_dies == 0) |
15626 | { | |
5afb4e99 | 15627 | per_cu->load_all_dies = 1; |
fd820528 DE |
15628 | |
15629 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
15630 | THIS_CU->cu may already be in use. So we can't just free it and | |
15631 | replace its DIEs with the ones we read in. Instead, we leave those | |
15632 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
15633 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
15634 | set. */ | |
dee91e82 | 15635 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
15636 | |
15637 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
15638 | } | |
15639 | ||
15640 | if (pd == NULL) | |
15641 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
15642 | _("could not find partial DIE 0x%x " |
15643 | "in cache [from module %s]\n"), | |
b64f50a1 | 15644 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 15645 | return pd; |
72bf9492 DJ |
15646 | } |
15647 | ||
abc72ce4 DE |
15648 | /* See if we can figure out if the class lives in a namespace. We do |
15649 | this by looking for a member function; its demangled name will | |
15650 | contain namespace info, if there is any. */ | |
15651 | ||
15652 | static void | |
15653 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
15654 | struct dwarf2_cu *cu) | |
15655 | { | |
15656 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
15657 | what template types look like, because the demangler | |
15658 | frequently doesn't give the same name as the debug info. We | |
15659 | could fix this by only using the demangled name to get the | |
15660 | prefix (but see comment in read_structure_type). */ | |
15661 | ||
15662 | struct partial_die_info *real_pdi; | |
15663 | struct partial_die_info *child_pdi; | |
15664 | ||
15665 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
15666 | we should not do this. We'll prepend the parent's fully qualified | |
15667 | name when we create the partial symbol. */ | |
15668 | ||
15669 | real_pdi = struct_pdi; | |
15670 | while (real_pdi->has_specification) | |
36586728 TT |
15671 | real_pdi = find_partial_die (real_pdi->spec_offset, |
15672 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
15673 | |
15674 | if (real_pdi->die_parent != NULL) | |
15675 | return; | |
15676 | ||
15677 | for (child_pdi = struct_pdi->die_child; | |
15678 | child_pdi != NULL; | |
15679 | child_pdi = child_pdi->die_sibling) | |
15680 | { | |
15681 | if (child_pdi->tag == DW_TAG_subprogram | |
15682 | && child_pdi->linkage_name != NULL) | |
15683 | { | |
15684 | char *actual_class_name | |
15685 | = language_class_name_from_physname (cu->language_defn, | |
15686 | child_pdi->linkage_name); | |
15687 | if (actual_class_name != NULL) | |
15688 | { | |
15689 | struct_pdi->name | |
10f0c4bb TT |
15690 | = obstack_copy0 (&cu->objfile->objfile_obstack, |
15691 | actual_class_name, | |
15692 | strlen (actual_class_name)); | |
abc72ce4 DE |
15693 | xfree (actual_class_name); |
15694 | } | |
15695 | break; | |
15696 | } | |
15697 | } | |
15698 | } | |
15699 | ||
72bf9492 DJ |
15700 | /* Adjust PART_DIE before generating a symbol for it. This function |
15701 | may set the is_external flag or change the DIE's name. */ | |
15702 | ||
15703 | static void | |
15704 | fixup_partial_die (struct partial_die_info *part_die, | |
15705 | struct dwarf2_cu *cu) | |
15706 | { | |
abc72ce4 DE |
15707 | /* Once we've fixed up a die, there's no point in doing so again. |
15708 | This also avoids a memory leak if we were to call | |
15709 | guess_partial_die_structure_name multiple times. */ | |
15710 | if (part_die->fixup_called) | |
15711 | return; | |
15712 | ||
72bf9492 DJ |
15713 | /* If we found a reference attribute and the DIE has no name, try |
15714 | to find a name in the referred to DIE. */ | |
15715 | ||
15716 | if (part_die->name == NULL && part_die->has_specification) | |
15717 | { | |
15718 | struct partial_die_info *spec_die; | |
72bf9492 | 15719 | |
36586728 TT |
15720 | spec_die = find_partial_die (part_die->spec_offset, |
15721 | part_die->spec_is_dwz, cu); | |
72bf9492 | 15722 | |
10b3939b | 15723 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
15724 | |
15725 | if (spec_die->name) | |
15726 | { | |
15727 | part_die->name = spec_die->name; | |
15728 | ||
15729 | /* Copy DW_AT_external attribute if it is set. */ | |
15730 | if (spec_die->is_external) | |
15731 | part_die->is_external = spec_die->is_external; | |
15732 | } | |
15733 | } | |
15734 | ||
15735 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
15736 | |
15737 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 15738 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 15739 | |
abc72ce4 DE |
15740 | /* If there is no parent die to provide a namespace, and there are |
15741 | children, see if we can determine the namespace from their linkage | |
122d1940 | 15742 | name. */ |
abc72ce4 | 15743 | if (cu->language == language_cplus |
8b70b953 | 15744 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
15745 | && part_die->die_parent == NULL |
15746 | && part_die->has_children | |
15747 | && (part_die->tag == DW_TAG_class_type | |
15748 | || part_die->tag == DW_TAG_structure_type | |
15749 | || part_die->tag == DW_TAG_union_type)) | |
15750 | guess_partial_die_structure_name (part_die, cu); | |
15751 | ||
53832f31 TT |
15752 | /* GCC might emit a nameless struct or union that has a linkage |
15753 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
15754 | if (part_die->name == NULL | |
96408a79 SA |
15755 | && (part_die->tag == DW_TAG_class_type |
15756 | || part_die->tag == DW_TAG_interface_type | |
15757 | || part_die->tag == DW_TAG_structure_type | |
15758 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
15759 | && part_die->linkage_name != NULL) |
15760 | { | |
15761 | char *demangled; | |
15762 | ||
8de20a37 | 15763 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
15764 | if (demangled) |
15765 | { | |
96408a79 SA |
15766 | const char *base; |
15767 | ||
15768 | /* Strip any leading namespaces/classes, keep only the base name. | |
15769 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
15770 | base = strrchr (demangled, ':'); | |
15771 | if (base && base > demangled && base[-1] == ':') | |
15772 | base++; | |
15773 | else | |
15774 | base = demangled; | |
15775 | ||
10f0c4bb TT |
15776 | part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack, |
15777 | base, strlen (base)); | |
53832f31 TT |
15778 | xfree (demangled); |
15779 | } | |
15780 | } | |
15781 | ||
abc72ce4 | 15782 | part_die->fixup_called = 1; |
72bf9492 DJ |
15783 | } |
15784 | ||
a8329558 | 15785 | /* Read an attribute value described by an attribute form. */ |
c906108c | 15786 | |
d521ce57 | 15787 | static const gdb_byte * |
dee91e82 DE |
15788 | read_attribute_value (const struct die_reader_specs *reader, |
15789 | struct attribute *attr, unsigned form, | |
d521ce57 | 15790 | const gdb_byte *info_ptr) |
c906108c | 15791 | { |
dee91e82 DE |
15792 | struct dwarf2_cu *cu = reader->cu; |
15793 | bfd *abfd = reader->abfd; | |
e7c27a73 | 15794 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
15795 | unsigned int bytes_read; |
15796 | struct dwarf_block *blk; | |
15797 | ||
a8329558 KW |
15798 | attr->form = form; |
15799 | switch (form) | |
c906108c | 15800 | { |
c906108c | 15801 | case DW_FORM_ref_addr: |
ae411497 | 15802 | if (cu->header.version == 2) |
4568ecf9 | 15803 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 15804 | else |
4568ecf9 DE |
15805 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
15806 | &cu->header, &bytes_read); | |
ae411497 TT |
15807 | info_ptr += bytes_read; |
15808 | break; | |
36586728 TT |
15809 | case DW_FORM_GNU_ref_alt: |
15810 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
15811 | info_ptr += bytes_read; | |
15812 | break; | |
ae411497 | 15813 | case DW_FORM_addr: |
e7c27a73 | 15814 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 15815 | info_ptr += bytes_read; |
c906108c SS |
15816 | break; |
15817 | case DW_FORM_block2: | |
7b5a2f43 | 15818 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15819 | blk->size = read_2_bytes (abfd, info_ptr); |
15820 | info_ptr += 2; | |
15821 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15822 | info_ptr += blk->size; | |
15823 | DW_BLOCK (attr) = blk; | |
15824 | break; | |
15825 | case DW_FORM_block4: | |
7b5a2f43 | 15826 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15827 | blk->size = read_4_bytes (abfd, info_ptr); |
15828 | info_ptr += 4; | |
15829 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15830 | info_ptr += blk->size; | |
15831 | DW_BLOCK (attr) = blk; | |
15832 | break; | |
15833 | case DW_FORM_data2: | |
15834 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
15835 | info_ptr += 2; | |
15836 | break; | |
15837 | case DW_FORM_data4: | |
15838 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
15839 | info_ptr += 4; | |
15840 | break; | |
15841 | case DW_FORM_data8: | |
15842 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
15843 | info_ptr += 8; | |
15844 | break; | |
2dc7f7b3 TT |
15845 | case DW_FORM_sec_offset: |
15846 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
15847 | info_ptr += bytes_read; | |
15848 | break; | |
c906108c | 15849 | case DW_FORM_string: |
9b1c24c8 | 15850 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 15851 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
15852 | info_ptr += bytes_read; |
15853 | break; | |
4bdf3d34 | 15854 | case DW_FORM_strp: |
36586728 TT |
15855 | if (!cu->per_cu->is_dwz) |
15856 | { | |
15857 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
15858 | &bytes_read); | |
15859 | DW_STRING_IS_CANONICAL (attr) = 0; | |
15860 | info_ptr += bytes_read; | |
15861 | break; | |
15862 | } | |
15863 | /* FALLTHROUGH */ | |
15864 | case DW_FORM_GNU_strp_alt: | |
15865 | { | |
15866 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
15867 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
15868 | &bytes_read); | |
15869 | ||
15870 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
15871 | DW_STRING_IS_CANONICAL (attr) = 0; | |
15872 | info_ptr += bytes_read; | |
15873 | } | |
4bdf3d34 | 15874 | break; |
2dc7f7b3 | 15875 | case DW_FORM_exprloc: |
c906108c | 15876 | case DW_FORM_block: |
7b5a2f43 | 15877 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15878 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15879 | info_ptr += bytes_read; | |
15880 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15881 | info_ptr += blk->size; | |
15882 | DW_BLOCK (attr) = blk; | |
15883 | break; | |
15884 | case DW_FORM_block1: | |
7b5a2f43 | 15885 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15886 | blk->size = read_1_byte (abfd, info_ptr); |
15887 | info_ptr += 1; | |
15888 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15889 | info_ptr += blk->size; | |
15890 | DW_BLOCK (attr) = blk; | |
15891 | break; | |
15892 | case DW_FORM_data1: | |
15893 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
15894 | info_ptr += 1; | |
15895 | break; | |
15896 | case DW_FORM_flag: | |
15897 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
15898 | info_ptr += 1; | |
15899 | break; | |
2dc7f7b3 TT |
15900 | case DW_FORM_flag_present: |
15901 | DW_UNSND (attr) = 1; | |
15902 | break; | |
c906108c SS |
15903 | case DW_FORM_sdata: |
15904 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
15905 | info_ptr += bytes_read; | |
15906 | break; | |
15907 | case DW_FORM_udata: | |
15908 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
15909 | info_ptr += bytes_read; | |
15910 | break; | |
15911 | case DW_FORM_ref1: | |
4568ecf9 DE |
15912 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15913 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
15914 | info_ptr += 1; |
15915 | break; | |
15916 | case DW_FORM_ref2: | |
4568ecf9 DE |
15917 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15918 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
15919 | info_ptr += 2; |
15920 | break; | |
15921 | case DW_FORM_ref4: | |
4568ecf9 DE |
15922 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15923 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
15924 | info_ptr += 4; |
15925 | break; | |
613e1657 | 15926 | case DW_FORM_ref8: |
4568ecf9 DE |
15927 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15928 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
15929 | info_ptr += 8; |
15930 | break; | |
55f1336d | 15931 | case DW_FORM_ref_sig8: |
ac9ec31b | 15932 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
15933 | info_ptr += 8; |
15934 | break; | |
c906108c | 15935 | case DW_FORM_ref_udata: |
4568ecf9 DE |
15936 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15937 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
15938 | info_ptr += bytes_read; |
15939 | break; | |
c906108c | 15940 | case DW_FORM_indirect: |
a8329558 KW |
15941 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15942 | info_ptr += bytes_read; | |
dee91e82 | 15943 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 15944 | break; |
3019eac3 DE |
15945 | case DW_FORM_GNU_addr_index: |
15946 | if (reader->dwo_file == NULL) | |
15947 | { | |
15948 | /* For now flag a hard error. | |
15949 | Later we can turn this into a complaint. */ | |
15950 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
15951 | dwarf_form_name (form), | |
15952 | bfd_get_filename (abfd)); | |
15953 | } | |
15954 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
15955 | info_ptr += bytes_read; | |
15956 | break; | |
15957 | case DW_FORM_GNU_str_index: | |
15958 | if (reader->dwo_file == NULL) | |
15959 | { | |
15960 | /* For now flag a hard error. | |
15961 | Later we can turn this into a complaint if warranted. */ | |
15962 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
15963 | dwarf_form_name (form), | |
15964 | bfd_get_filename (abfd)); | |
15965 | } | |
15966 | { | |
15967 | ULONGEST str_index = | |
15968 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
15969 | ||
342587c4 | 15970 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
15971 | DW_STRING_IS_CANONICAL (attr) = 0; |
15972 | info_ptr += bytes_read; | |
15973 | } | |
15974 | break; | |
c906108c | 15975 | default: |
8a3fe4f8 | 15976 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
15977 | dwarf_form_name (form), |
15978 | bfd_get_filename (abfd)); | |
c906108c | 15979 | } |
28e94949 | 15980 | |
36586728 | 15981 | /* Super hack. */ |
7771576e | 15982 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
15983 | attr->form = DW_FORM_GNU_ref_alt; |
15984 | ||
28e94949 JB |
15985 | /* We have seen instances where the compiler tried to emit a byte |
15986 | size attribute of -1 which ended up being encoded as an unsigned | |
15987 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
15988 | an object of this size seems pretty unlikely so we can relatively | |
15989 | safely treat these cases as if the size attribute was invalid and | |
15990 | treat them as zero by default. */ | |
15991 | if (attr->name == DW_AT_byte_size | |
15992 | && form == DW_FORM_data4 | |
15993 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
15994 | { |
15995 | complaint | |
15996 | (&symfile_complaints, | |
43bbcdc2 PH |
15997 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
15998 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
15999 | DW_UNSND (attr) = 0; |
16000 | } | |
28e94949 | 16001 | |
c906108c SS |
16002 | return info_ptr; |
16003 | } | |
16004 | ||
a8329558 KW |
16005 | /* Read an attribute described by an abbreviated attribute. */ |
16006 | ||
d521ce57 | 16007 | static const gdb_byte * |
dee91e82 DE |
16008 | read_attribute (const struct die_reader_specs *reader, |
16009 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 16010 | const gdb_byte *info_ptr) |
a8329558 KW |
16011 | { |
16012 | attr->name = abbrev->name; | |
dee91e82 | 16013 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
16014 | } |
16015 | ||
0963b4bd | 16016 | /* Read dwarf information from a buffer. */ |
c906108c SS |
16017 | |
16018 | static unsigned int | |
a1855c1d | 16019 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16020 | { |
fe1b8b76 | 16021 | return bfd_get_8 (abfd, buf); |
c906108c SS |
16022 | } |
16023 | ||
16024 | static int | |
a1855c1d | 16025 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16026 | { |
fe1b8b76 | 16027 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
16028 | } |
16029 | ||
16030 | static unsigned int | |
a1855c1d | 16031 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16032 | { |
fe1b8b76 | 16033 | return bfd_get_16 (abfd, buf); |
c906108c SS |
16034 | } |
16035 | ||
21ae7a4d | 16036 | static int |
a1855c1d | 16037 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16038 | { |
16039 | return bfd_get_signed_16 (abfd, buf); | |
16040 | } | |
16041 | ||
c906108c | 16042 | static unsigned int |
a1855c1d | 16043 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16044 | { |
fe1b8b76 | 16045 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16046 | } |
16047 | ||
21ae7a4d | 16048 | static int |
a1855c1d | 16049 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16050 | { |
16051 | return bfd_get_signed_32 (abfd, buf); | |
16052 | } | |
16053 | ||
93311388 | 16054 | static ULONGEST |
a1855c1d | 16055 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16056 | { |
fe1b8b76 | 16057 | return bfd_get_64 (abfd, buf); |
c906108c SS |
16058 | } |
16059 | ||
16060 | static CORE_ADDR | |
d521ce57 | 16061 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 16062 | unsigned int *bytes_read) |
c906108c | 16063 | { |
e7c27a73 | 16064 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16065 | CORE_ADDR retval = 0; |
16066 | ||
107d2387 | 16067 | if (cu_header->signed_addr_p) |
c906108c | 16068 | { |
107d2387 AC |
16069 | switch (cu_header->addr_size) |
16070 | { | |
16071 | case 2: | |
fe1b8b76 | 16072 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
16073 | break; |
16074 | case 4: | |
fe1b8b76 | 16075 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
16076 | break; |
16077 | case 8: | |
fe1b8b76 | 16078 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
16079 | break; |
16080 | default: | |
8e65ff28 | 16081 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 16082 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 16083 | bfd_get_filename (abfd)); |
107d2387 AC |
16084 | } |
16085 | } | |
16086 | else | |
16087 | { | |
16088 | switch (cu_header->addr_size) | |
16089 | { | |
16090 | case 2: | |
fe1b8b76 | 16091 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
16092 | break; |
16093 | case 4: | |
fe1b8b76 | 16094 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
16095 | break; |
16096 | case 8: | |
fe1b8b76 | 16097 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
16098 | break; |
16099 | default: | |
8e65ff28 | 16100 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
16101 | _("read_address: bad switch, " |
16102 | "unsigned [in module %s]"), | |
659b0389 | 16103 | bfd_get_filename (abfd)); |
107d2387 | 16104 | } |
c906108c | 16105 | } |
64367e0a | 16106 | |
107d2387 AC |
16107 | *bytes_read = cu_header->addr_size; |
16108 | return retval; | |
c906108c SS |
16109 | } |
16110 | ||
f7ef9339 | 16111 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
16112 | specification allows the initial length to take up either 4 bytes |
16113 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
16114 | bytes describe the length and all offsets will be 8 bytes in length | |
16115 | instead of 4. | |
16116 | ||
f7ef9339 KB |
16117 | An older, non-standard 64-bit format is also handled by this |
16118 | function. The older format in question stores the initial length | |
16119 | as an 8-byte quantity without an escape value. Lengths greater | |
16120 | than 2^32 aren't very common which means that the initial 4 bytes | |
16121 | is almost always zero. Since a length value of zero doesn't make | |
16122 | sense for the 32-bit format, this initial zero can be considered to | |
16123 | be an escape value which indicates the presence of the older 64-bit | |
16124 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
16125 | greater than 4GB. If it becomes necessary to handle lengths |
16126 | somewhat larger than 4GB, we could allow other small values (such | |
16127 | as the non-sensical values of 1, 2, and 3) to also be used as | |
16128 | escape values indicating the presence of the old format. | |
f7ef9339 | 16129 | |
917c78fc MK |
16130 | The value returned via bytes_read should be used to increment the |
16131 | relevant pointer after calling read_initial_length(). | |
c764a876 | 16132 | |
613e1657 KB |
16133 | [ Note: read_initial_length() and read_offset() are based on the |
16134 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 16135 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
16136 | from: |
16137 | ||
f7ef9339 | 16138 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 16139 | |
613e1657 KB |
16140 | This document is only a draft and is subject to change. (So beware.) |
16141 | ||
f7ef9339 | 16142 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
16143 | determined empirically by examining 64-bit ELF files produced by |
16144 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
16145 | |
16146 | - Kevin, July 16, 2002 | |
613e1657 KB |
16147 | ] */ |
16148 | ||
16149 | static LONGEST | |
d521ce57 | 16150 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 16151 | { |
fe1b8b76 | 16152 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 16153 | |
dd373385 | 16154 | if (length == 0xffffffff) |
613e1657 | 16155 | { |
fe1b8b76 | 16156 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 16157 | *bytes_read = 12; |
613e1657 | 16158 | } |
dd373385 | 16159 | else if (length == 0) |
f7ef9339 | 16160 | { |
dd373385 | 16161 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 16162 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 16163 | *bytes_read = 8; |
f7ef9339 | 16164 | } |
613e1657 KB |
16165 | else |
16166 | { | |
16167 | *bytes_read = 4; | |
613e1657 KB |
16168 | } |
16169 | ||
c764a876 DE |
16170 | return length; |
16171 | } | |
dd373385 | 16172 | |
c764a876 DE |
16173 | /* Cover function for read_initial_length. |
16174 | Returns the length of the object at BUF, and stores the size of the | |
16175 | initial length in *BYTES_READ and stores the size that offsets will be in | |
16176 | *OFFSET_SIZE. | |
16177 | If the initial length size is not equivalent to that specified in | |
16178 | CU_HEADER then issue a complaint. | |
16179 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 16180 | |
c764a876 | 16181 | static LONGEST |
d521ce57 | 16182 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
16183 | const struct comp_unit_head *cu_header, |
16184 | unsigned int *bytes_read, | |
16185 | unsigned int *offset_size) | |
16186 | { | |
16187 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
16188 | ||
16189 | gdb_assert (cu_header->initial_length_size == 4 | |
16190 | || cu_header->initial_length_size == 8 | |
16191 | || cu_header->initial_length_size == 12); | |
16192 | ||
16193 | if (cu_header->initial_length_size != *bytes_read) | |
16194 | complaint (&symfile_complaints, | |
16195 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 16196 | |
c764a876 | 16197 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 16198 | return length; |
613e1657 KB |
16199 | } |
16200 | ||
16201 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 16202 | given by cu_header->offset_size. */ |
613e1657 KB |
16203 | |
16204 | static LONGEST | |
d521ce57 TT |
16205 | read_offset (bfd *abfd, const gdb_byte *buf, |
16206 | const struct comp_unit_head *cu_header, | |
891d2f0b | 16207 | unsigned int *bytes_read) |
c764a876 DE |
16208 | { |
16209 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 16210 | |
c764a876 DE |
16211 | *bytes_read = cu_header->offset_size; |
16212 | return offset; | |
16213 | } | |
16214 | ||
16215 | /* Read an offset from the data stream. */ | |
16216 | ||
16217 | static LONGEST | |
d521ce57 | 16218 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
16219 | { |
16220 | LONGEST retval = 0; | |
16221 | ||
c764a876 | 16222 | switch (offset_size) |
613e1657 KB |
16223 | { |
16224 | case 4: | |
fe1b8b76 | 16225 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
16226 | break; |
16227 | case 8: | |
fe1b8b76 | 16228 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
16229 | break; |
16230 | default: | |
8e65ff28 | 16231 | internal_error (__FILE__, __LINE__, |
c764a876 | 16232 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 16233 | bfd_get_filename (abfd)); |
613e1657 KB |
16234 | } |
16235 | ||
917c78fc | 16236 | return retval; |
613e1657 KB |
16237 | } |
16238 | ||
d521ce57 TT |
16239 | static const gdb_byte * |
16240 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
16241 | { |
16242 | /* If the size of a host char is 8 bits, we can return a pointer | |
16243 | to the buffer, otherwise we have to copy the data to a buffer | |
16244 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16245 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 16246 | return buf; |
c906108c SS |
16247 | } |
16248 | ||
d521ce57 TT |
16249 | static const char * |
16250 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
16251 | unsigned int *bytes_read_ptr) | |
c906108c SS |
16252 | { |
16253 | /* If the size of a host char is 8 bits, we can return a pointer | |
16254 | to the string, otherwise we have to copy the string to a buffer | |
16255 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16256 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
16257 | if (*buf == '\0') |
16258 | { | |
16259 | *bytes_read_ptr = 1; | |
16260 | return NULL; | |
16261 | } | |
d521ce57 TT |
16262 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
16263 | return (const char *) buf; | |
4bdf3d34 JJ |
16264 | } |
16265 | ||
d521ce57 | 16266 | static const char * |
cf2c3c16 | 16267 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 16268 | { |
be391dca | 16269 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 16270 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
16271 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
16272 | bfd_get_filename (abfd)); | |
dce234bc | 16273 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
16274 | error (_("DW_FORM_strp pointing outside of " |
16275 | ".debug_str section [in module %s]"), | |
16276 | bfd_get_filename (abfd)); | |
4bdf3d34 | 16277 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 16278 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 16279 | return NULL; |
d521ce57 | 16280 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
16281 | } |
16282 | ||
36586728 TT |
16283 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
16284 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
16285 | the string consists of a single NUL byte, return NULL; otherwise | |
16286 | return a pointer to the string. */ | |
16287 | ||
d521ce57 | 16288 | static const char * |
36586728 TT |
16289 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
16290 | { | |
16291 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
16292 | ||
16293 | if (dwz->str.buffer == NULL) | |
16294 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
16295 | "section [in module %s]"), | |
16296 | bfd_get_filename (dwz->dwz_bfd)); | |
16297 | if (str_offset >= dwz->str.size) | |
16298 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
16299 | ".debug_str section [in module %s]"), | |
16300 | bfd_get_filename (dwz->dwz_bfd)); | |
16301 | gdb_assert (HOST_CHAR_BIT == 8); | |
16302 | if (dwz->str.buffer[str_offset] == '\0') | |
16303 | return NULL; | |
d521ce57 | 16304 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
16305 | } |
16306 | ||
d521ce57 TT |
16307 | static const char * |
16308 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
16309 | const struct comp_unit_head *cu_header, |
16310 | unsigned int *bytes_read_ptr) | |
16311 | { | |
16312 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
16313 | ||
16314 | return read_indirect_string_at_offset (abfd, str_offset); | |
16315 | } | |
16316 | ||
12df843f | 16317 | static ULONGEST |
d521ce57 TT |
16318 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
16319 | unsigned int *bytes_read_ptr) | |
c906108c | 16320 | { |
12df843f | 16321 | ULONGEST result; |
ce5d95e1 | 16322 | unsigned int num_read; |
c906108c SS |
16323 | int i, shift; |
16324 | unsigned char byte; | |
16325 | ||
16326 | result = 0; | |
16327 | shift = 0; | |
16328 | num_read = 0; | |
16329 | i = 0; | |
16330 | while (1) | |
16331 | { | |
fe1b8b76 | 16332 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16333 | buf++; |
16334 | num_read++; | |
12df843f | 16335 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
16336 | if ((byte & 128) == 0) |
16337 | { | |
16338 | break; | |
16339 | } | |
16340 | shift += 7; | |
16341 | } | |
16342 | *bytes_read_ptr = num_read; | |
16343 | return result; | |
16344 | } | |
16345 | ||
12df843f | 16346 | static LONGEST |
d521ce57 TT |
16347 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
16348 | unsigned int *bytes_read_ptr) | |
c906108c | 16349 | { |
12df843f | 16350 | LONGEST result; |
77e0b926 | 16351 | int i, shift, num_read; |
c906108c SS |
16352 | unsigned char byte; |
16353 | ||
16354 | result = 0; | |
16355 | shift = 0; | |
c906108c SS |
16356 | num_read = 0; |
16357 | i = 0; | |
16358 | while (1) | |
16359 | { | |
fe1b8b76 | 16360 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16361 | buf++; |
16362 | num_read++; | |
12df843f | 16363 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
16364 | shift += 7; |
16365 | if ((byte & 128) == 0) | |
16366 | { | |
16367 | break; | |
16368 | } | |
16369 | } | |
77e0b926 | 16370 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 16371 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
16372 | *bytes_read_ptr = num_read; |
16373 | return result; | |
16374 | } | |
16375 | ||
3019eac3 DE |
16376 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
16377 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
16378 | ADDR_SIZE is the size of addresses from the CU header. */ | |
16379 | ||
16380 | static CORE_ADDR | |
16381 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
16382 | { | |
16383 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16384 | bfd *abfd = objfile->obfd; | |
16385 | const gdb_byte *info_ptr; | |
16386 | ||
16387 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
16388 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
16389 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 16390 | objfile_name (objfile)); |
3019eac3 DE |
16391 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
16392 | error (_("DW_FORM_addr_index pointing outside of " | |
16393 | ".debug_addr section [in module %s]"), | |
4262abfb | 16394 | objfile_name (objfile)); |
3019eac3 DE |
16395 | info_ptr = (dwarf2_per_objfile->addr.buffer |
16396 | + addr_base + addr_index * addr_size); | |
16397 | if (addr_size == 4) | |
16398 | return bfd_get_32 (abfd, info_ptr); | |
16399 | else | |
16400 | return bfd_get_64 (abfd, info_ptr); | |
16401 | } | |
16402 | ||
16403 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
16404 | ||
16405 | static CORE_ADDR | |
16406 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
16407 | { | |
16408 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
16409 | } | |
16410 | ||
16411 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
16412 | ||
16413 | static CORE_ADDR | |
d521ce57 | 16414 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
16415 | unsigned int *bytes_read) |
16416 | { | |
16417 | bfd *abfd = cu->objfile->obfd; | |
16418 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
16419 | ||
16420 | return read_addr_index (cu, addr_index); | |
16421 | } | |
16422 | ||
16423 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
16424 | back to dwarf2_read_addr_index. */ | |
16425 | ||
16426 | struct dwarf2_read_addr_index_data | |
16427 | { | |
16428 | ULONGEST addr_base; | |
16429 | int addr_size; | |
16430 | }; | |
16431 | ||
16432 | /* die_reader_func for dwarf2_read_addr_index. */ | |
16433 | ||
16434 | static void | |
16435 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 16436 | const gdb_byte *info_ptr, |
3019eac3 DE |
16437 | struct die_info *comp_unit_die, |
16438 | int has_children, | |
16439 | void *data) | |
16440 | { | |
16441 | struct dwarf2_cu *cu = reader->cu; | |
16442 | struct dwarf2_read_addr_index_data *aidata = | |
16443 | (struct dwarf2_read_addr_index_data *) data; | |
16444 | ||
16445 | aidata->addr_base = cu->addr_base; | |
16446 | aidata->addr_size = cu->header.addr_size; | |
16447 | } | |
16448 | ||
16449 | /* Given an index in .debug_addr, fetch the value. | |
16450 | NOTE: This can be called during dwarf expression evaluation, | |
16451 | long after the debug information has been read, and thus per_cu->cu | |
16452 | may no longer exist. */ | |
16453 | ||
16454 | CORE_ADDR | |
16455 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
16456 | unsigned int addr_index) | |
16457 | { | |
16458 | struct objfile *objfile = per_cu->objfile; | |
16459 | struct dwarf2_cu *cu = per_cu->cu; | |
16460 | ULONGEST addr_base; | |
16461 | int addr_size; | |
16462 | ||
16463 | /* This is intended to be called from outside this file. */ | |
16464 | dw2_setup (objfile); | |
16465 | ||
16466 | /* We need addr_base and addr_size. | |
16467 | If we don't have PER_CU->cu, we have to get it. | |
16468 | Nasty, but the alternative is storing the needed info in PER_CU, | |
16469 | which at this point doesn't seem justified: it's not clear how frequently | |
16470 | it would get used and it would increase the size of every PER_CU. | |
16471 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
16472 | so we're not in uncharted territory here. | |
16473 | Alas we need to be a bit more complicated as addr_base is contained | |
16474 | in the DIE. | |
16475 | ||
16476 | We don't need to read the entire CU(/TU). | |
16477 | We just need the header and top level die. | |
a1b64ce1 | 16478 | |
3019eac3 | 16479 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 16480 | For now we skip this optimization. */ |
3019eac3 DE |
16481 | |
16482 | if (cu != NULL) | |
16483 | { | |
16484 | addr_base = cu->addr_base; | |
16485 | addr_size = cu->header.addr_size; | |
16486 | } | |
16487 | else | |
16488 | { | |
16489 | struct dwarf2_read_addr_index_data aidata; | |
16490 | ||
a1b64ce1 DE |
16491 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
16492 | we need addr_base. */ | |
16493 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
16494 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
16495 | addr_base = aidata.addr_base; |
16496 | addr_size = aidata.addr_size; | |
16497 | } | |
16498 | ||
16499 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
16500 | } | |
16501 | ||
57d63ce2 DE |
16502 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
16503 | This is only used by the Fission support. */ | |
3019eac3 | 16504 | |
d521ce57 | 16505 | static const char * |
342587c4 | 16506 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
16507 | { |
16508 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 16509 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 16510 | bfd *abfd = objfile->obfd; |
342587c4 | 16511 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
16512 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
16513 | struct dwarf2_section_info *str_offsets_section = | |
16514 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 16515 | const gdb_byte *info_ptr; |
3019eac3 | 16516 | ULONGEST str_offset; |
57d63ce2 | 16517 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 16518 | |
73869dc2 DE |
16519 | dwarf2_read_section (objfile, str_section); |
16520 | dwarf2_read_section (objfile, str_offsets_section); | |
16521 | if (str_section->buffer == NULL) | |
57d63ce2 | 16522 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 16523 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16524 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16525 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 16526 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 16527 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16528 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16529 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 16530 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 16531 | " section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16532 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16533 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
16534 | + str_index * cu->header.offset_size); |
16535 | if (cu->header.offset_size == 4) | |
16536 | str_offset = bfd_get_32 (abfd, info_ptr); | |
16537 | else | |
16538 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 16539 | if (str_offset >= str_section->size) |
57d63ce2 | 16540 | error (_("Offset from %s pointing outside of" |
3019eac3 | 16541 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16542 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16543 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
16544 | } |
16545 | ||
3019eac3 DE |
16546 | /* Return the length of an LEB128 number in BUF. */ |
16547 | ||
16548 | static int | |
16549 | leb128_size (const gdb_byte *buf) | |
16550 | { | |
16551 | const gdb_byte *begin = buf; | |
16552 | gdb_byte byte; | |
16553 | ||
16554 | while (1) | |
16555 | { | |
16556 | byte = *buf++; | |
16557 | if ((byte & 128) == 0) | |
16558 | return buf - begin; | |
16559 | } | |
16560 | } | |
16561 | ||
c906108c | 16562 | static void |
e142c38c | 16563 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
16564 | { |
16565 | switch (lang) | |
16566 | { | |
16567 | case DW_LANG_C89: | |
76bee0cc | 16568 | case DW_LANG_C99: |
c906108c | 16569 | case DW_LANG_C: |
d1be3247 | 16570 | case DW_LANG_UPC: |
e142c38c | 16571 | cu->language = language_c; |
c906108c SS |
16572 | break; |
16573 | case DW_LANG_C_plus_plus: | |
e142c38c | 16574 | cu->language = language_cplus; |
c906108c | 16575 | break; |
6aecb9c2 JB |
16576 | case DW_LANG_D: |
16577 | cu->language = language_d; | |
16578 | break; | |
c906108c SS |
16579 | case DW_LANG_Fortran77: |
16580 | case DW_LANG_Fortran90: | |
b21b22e0 | 16581 | case DW_LANG_Fortran95: |
e142c38c | 16582 | cu->language = language_fortran; |
c906108c | 16583 | break; |
a766d390 DE |
16584 | case DW_LANG_Go: |
16585 | cu->language = language_go; | |
16586 | break; | |
c906108c | 16587 | case DW_LANG_Mips_Assembler: |
e142c38c | 16588 | cu->language = language_asm; |
c906108c | 16589 | break; |
bebd888e | 16590 | case DW_LANG_Java: |
e142c38c | 16591 | cu->language = language_java; |
bebd888e | 16592 | break; |
c906108c | 16593 | case DW_LANG_Ada83: |
8aaf0b47 | 16594 | case DW_LANG_Ada95: |
bc5f45f8 JB |
16595 | cu->language = language_ada; |
16596 | break; | |
72019c9c GM |
16597 | case DW_LANG_Modula2: |
16598 | cu->language = language_m2; | |
16599 | break; | |
fe8e67fd PM |
16600 | case DW_LANG_Pascal83: |
16601 | cu->language = language_pascal; | |
16602 | break; | |
22566fbd DJ |
16603 | case DW_LANG_ObjC: |
16604 | cu->language = language_objc; | |
16605 | break; | |
c906108c SS |
16606 | case DW_LANG_Cobol74: |
16607 | case DW_LANG_Cobol85: | |
c906108c | 16608 | default: |
e142c38c | 16609 | cu->language = language_minimal; |
c906108c SS |
16610 | break; |
16611 | } | |
e142c38c | 16612 | cu->language_defn = language_def (cu->language); |
c906108c SS |
16613 | } |
16614 | ||
16615 | /* Return the named attribute or NULL if not there. */ | |
16616 | ||
16617 | static struct attribute * | |
e142c38c | 16618 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 16619 | { |
a48e046c | 16620 | for (;;) |
c906108c | 16621 | { |
a48e046c TT |
16622 | unsigned int i; |
16623 | struct attribute *spec = NULL; | |
16624 | ||
16625 | for (i = 0; i < die->num_attrs; ++i) | |
16626 | { | |
16627 | if (die->attrs[i].name == name) | |
16628 | return &die->attrs[i]; | |
16629 | if (die->attrs[i].name == DW_AT_specification | |
16630 | || die->attrs[i].name == DW_AT_abstract_origin) | |
16631 | spec = &die->attrs[i]; | |
16632 | } | |
16633 | ||
16634 | if (!spec) | |
16635 | break; | |
c906108c | 16636 | |
f2f0e013 | 16637 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 16638 | } |
c5aa993b | 16639 | |
c906108c SS |
16640 | return NULL; |
16641 | } | |
16642 | ||
348e048f DE |
16643 | /* Return the named attribute or NULL if not there, |
16644 | but do not follow DW_AT_specification, etc. | |
16645 | This is for use in contexts where we're reading .debug_types dies. | |
16646 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
16647 | back up the chain, and we want to go down. */ | |
16648 | ||
16649 | static struct attribute * | |
45e58e77 | 16650 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
16651 | { |
16652 | unsigned int i; | |
16653 | ||
16654 | for (i = 0; i < die->num_attrs; ++i) | |
16655 | if (die->attrs[i].name == name) | |
16656 | return &die->attrs[i]; | |
16657 | ||
16658 | return NULL; | |
16659 | } | |
16660 | ||
05cf31d1 JB |
16661 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
16662 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 16663 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
16664 | |
16665 | static int | |
16666 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
16667 | { | |
16668 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
16669 | ||
16670 | return (attr && DW_UNSND (attr)); | |
16671 | } | |
16672 | ||
3ca72b44 | 16673 | static int |
e142c38c | 16674 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 16675 | { |
05cf31d1 JB |
16676 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
16677 | which value is non-zero. However, we have to be careful with | |
16678 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
16679 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
16680 | end up accidently finding a declaration attribute that belongs | |
16681 | to a different DIE referenced by the specification attribute, | |
16682 | even though the given DIE does not have a declaration attribute. */ | |
16683 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
16684 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
16685 | } |
16686 | ||
63d06c5c | 16687 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 16688 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
16689 | containing the return value on output. If there is no |
16690 | specification, but there is an abstract origin, that is | |
16691 | returned. */ | |
63d06c5c DC |
16692 | |
16693 | static struct die_info * | |
f2f0e013 | 16694 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 16695 | { |
f2f0e013 DJ |
16696 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
16697 | *spec_cu); | |
63d06c5c | 16698 | |
edb3359d DJ |
16699 | if (spec_attr == NULL) |
16700 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
16701 | ||
63d06c5c DC |
16702 | if (spec_attr == NULL) |
16703 | return NULL; | |
16704 | else | |
f2f0e013 | 16705 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 16706 | } |
c906108c | 16707 | |
debd256d | 16708 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
16709 | refers to. |
16710 | NOTE: This is also used as a "cleanup" function. */ | |
16711 | ||
debd256d JB |
16712 | static void |
16713 | free_line_header (struct line_header *lh) | |
16714 | { | |
16715 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 16716 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
16717 | |
16718 | /* Remember that all the lh->file_names[i].name pointers are | |
16719 | pointers into debug_line_buffer, and don't need to be freed. */ | |
16720 | if (lh->file_names) | |
a8bc7b56 | 16721 | xfree (lh->file_names); |
debd256d JB |
16722 | |
16723 | /* Similarly for the include directory names. */ | |
16724 | if (lh->include_dirs) | |
a8bc7b56 | 16725 | xfree (lh->include_dirs); |
debd256d | 16726 | |
a8bc7b56 | 16727 | xfree (lh); |
debd256d JB |
16728 | } |
16729 | ||
debd256d | 16730 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 16731 | |
debd256d | 16732 | static void |
d521ce57 | 16733 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 16734 | { |
debd256d JB |
16735 | /* Grow the array if necessary. */ |
16736 | if (lh->include_dirs_size == 0) | |
c5aa993b | 16737 | { |
debd256d JB |
16738 | lh->include_dirs_size = 1; /* for testing */ |
16739 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
16740 | * sizeof (*lh->include_dirs)); | |
16741 | } | |
16742 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
16743 | { | |
16744 | lh->include_dirs_size *= 2; | |
16745 | lh->include_dirs = xrealloc (lh->include_dirs, | |
16746 | (lh->include_dirs_size | |
16747 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 16748 | } |
c906108c | 16749 | |
debd256d JB |
16750 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
16751 | } | |
6e70227d | 16752 | |
debd256d | 16753 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 16754 | |
debd256d JB |
16755 | static void |
16756 | add_file_name (struct line_header *lh, | |
d521ce57 | 16757 | const char *name, |
debd256d JB |
16758 | unsigned int dir_index, |
16759 | unsigned int mod_time, | |
16760 | unsigned int length) | |
16761 | { | |
16762 | struct file_entry *fe; | |
16763 | ||
16764 | /* Grow the array if necessary. */ | |
16765 | if (lh->file_names_size == 0) | |
16766 | { | |
16767 | lh->file_names_size = 1; /* for testing */ | |
16768 | lh->file_names = xmalloc (lh->file_names_size | |
16769 | * sizeof (*lh->file_names)); | |
16770 | } | |
16771 | else if (lh->num_file_names >= lh->file_names_size) | |
16772 | { | |
16773 | lh->file_names_size *= 2; | |
16774 | lh->file_names = xrealloc (lh->file_names, | |
16775 | (lh->file_names_size | |
16776 | * sizeof (*lh->file_names))); | |
16777 | } | |
16778 | ||
16779 | fe = &lh->file_names[lh->num_file_names++]; | |
16780 | fe->name = name; | |
16781 | fe->dir_index = dir_index; | |
16782 | fe->mod_time = mod_time; | |
16783 | fe->length = length; | |
aaa75496 | 16784 | fe->included_p = 0; |
cb1df416 | 16785 | fe->symtab = NULL; |
debd256d | 16786 | } |
6e70227d | 16787 | |
36586728 TT |
16788 | /* A convenience function to find the proper .debug_line section for a |
16789 | CU. */ | |
16790 | ||
16791 | static struct dwarf2_section_info * | |
16792 | get_debug_line_section (struct dwarf2_cu *cu) | |
16793 | { | |
16794 | struct dwarf2_section_info *section; | |
16795 | ||
16796 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
16797 | DWO file. */ | |
16798 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
16799 | section = &cu->dwo_unit->dwo_file->sections.line; | |
16800 | else if (cu->per_cu->is_dwz) | |
16801 | { | |
16802 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16803 | ||
16804 | section = &dwz->line; | |
16805 | } | |
16806 | else | |
16807 | section = &dwarf2_per_objfile->line; | |
16808 | ||
16809 | return section; | |
16810 | } | |
16811 | ||
debd256d | 16812 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 16813 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 16814 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
16815 | |
16816 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
16817 | the returned object point into the dwarf line section buffer, |
16818 | and must not be freed. */ | |
ae2de4f8 | 16819 | |
debd256d | 16820 | static struct line_header * |
3019eac3 | 16821 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
16822 | { |
16823 | struct cleanup *back_to; | |
16824 | struct line_header *lh; | |
d521ce57 | 16825 | const gdb_byte *line_ptr; |
c764a876 | 16826 | unsigned int bytes_read, offset_size; |
debd256d | 16827 | int i; |
d521ce57 | 16828 | const char *cur_dir, *cur_file; |
3019eac3 DE |
16829 | struct dwarf2_section_info *section; |
16830 | bfd *abfd; | |
16831 | ||
36586728 | 16832 | section = get_debug_line_section (cu); |
3019eac3 DE |
16833 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
16834 | if (section->buffer == NULL) | |
debd256d | 16835 | { |
3019eac3 DE |
16836 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
16837 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
16838 | else | |
16839 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
16840 | return 0; |
16841 | } | |
16842 | ||
fceca515 DE |
16843 | /* We can't do this until we know the section is non-empty. |
16844 | Only then do we know we have such a section. */ | |
a32a8923 | 16845 | abfd = get_section_bfd_owner (section); |
fceca515 | 16846 | |
a738430d MK |
16847 | /* Make sure that at least there's room for the total_length field. |
16848 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 16849 | if (offset + 4 >= section->size) |
debd256d | 16850 | { |
4d3c2250 | 16851 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
16852 | return 0; |
16853 | } | |
16854 | ||
16855 | lh = xmalloc (sizeof (*lh)); | |
16856 | memset (lh, 0, sizeof (*lh)); | |
16857 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
16858 | (void *) lh); | |
16859 | ||
3019eac3 | 16860 | line_ptr = section->buffer + offset; |
debd256d | 16861 | |
a738430d | 16862 | /* Read in the header. */ |
6e70227d | 16863 | lh->total_length = |
c764a876 DE |
16864 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
16865 | &bytes_read, &offset_size); | |
debd256d | 16866 | line_ptr += bytes_read; |
3019eac3 | 16867 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 16868 | { |
4d3c2250 | 16869 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 16870 | do_cleanups (back_to); |
debd256d JB |
16871 | return 0; |
16872 | } | |
16873 | lh->statement_program_end = line_ptr + lh->total_length; | |
16874 | lh->version = read_2_bytes (abfd, line_ptr); | |
16875 | line_ptr += 2; | |
c764a876 DE |
16876 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
16877 | line_ptr += offset_size; | |
debd256d JB |
16878 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
16879 | line_ptr += 1; | |
2dc7f7b3 TT |
16880 | if (lh->version >= 4) |
16881 | { | |
16882 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
16883 | line_ptr += 1; | |
16884 | } | |
16885 | else | |
16886 | lh->maximum_ops_per_instruction = 1; | |
16887 | ||
16888 | if (lh->maximum_ops_per_instruction == 0) | |
16889 | { | |
16890 | lh->maximum_ops_per_instruction = 1; | |
16891 | complaint (&symfile_complaints, | |
3e43a32a MS |
16892 | _("invalid maximum_ops_per_instruction " |
16893 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
16894 | } |
16895 | ||
debd256d JB |
16896 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
16897 | line_ptr += 1; | |
16898 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
16899 | line_ptr += 1; | |
16900 | lh->line_range = read_1_byte (abfd, line_ptr); | |
16901 | line_ptr += 1; | |
16902 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
16903 | line_ptr += 1; | |
16904 | lh->standard_opcode_lengths | |
fe1b8b76 | 16905 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
16906 | |
16907 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
16908 | for (i = 1; i < lh->opcode_base; ++i) | |
16909 | { | |
16910 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
16911 | line_ptr += 1; | |
16912 | } | |
16913 | ||
a738430d | 16914 | /* Read directory table. */ |
9b1c24c8 | 16915 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
16916 | { |
16917 | line_ptr += bytes_read; | |
16918 | add_include_dir (lh, cur_dir); | |
16919 | } | |
16920 | line_ptr += bytes_read; | |
16921 | ||
a738430d | 16922 | /* Read file name table. */ |
9b1c24c8 | 16923 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
16924 | { |
16925 | unsigned int dir_index, mod_time, length; | |
16926 | ||
16927 | line_ptr += bytes_read; | |
16928 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16929 | line_ptr += bytes_read; | |
16930 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16931 | line_ptr += bytes_read; | |
16932 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16933 | line_ptr += bytes_read; | |
16934 | ||
16935 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
16936 | } | |
16937 | line_ptr += bytes_read; | |
6e70227d | 16938 | lh->statement_program_start = line_ptr; |
debd256d | 16939 | |
3019eac3 | 16940 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 16941 | complaint (&symfile_complaints, |
3e43a32a MS |
16942 | _("line number info header doesn't " |
16943 | "fit in `.debug_line' section")); | |
debd256d JB |
16944 | |
16945 | discard_cleanups (back_to); | |
16946 | return lh; | |
16947 | } | |
c906108c | 16948 | |
c6da4cef DE |
16949 | /* Subroutine of dwarf_decode_lines to simplify it. |
16950 | Return the file name of the psymtab for included file FILE_INDEX | |
16951 | in line header LH of PST. | |
16952 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
16953 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
16954 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
16955 | ||
16956 | The function creates dangling cleanup registration. */ | |
c6da4cef | 16957 | |
d521ce57 | 16958 | static const char * |
c6da4cef DE |
16959 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
16960 | const struct partial_symtab *pst, | |
16961 | const char *comp_dir) | |
16962 | { | |
16963 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
16964 | const char *include_name = fe.name; |
16965 | const char *include_name_to_compare = include_name; | |
16966 | const char *dir_name = NULL; | |
72b9f47f TT |
16967 | const char *pst_filename; |
16968 | char *copied_name = NULL; | |
c6da4cef DE |
16969 | int file_is_pst; |
16970 | ||
16971 | if (fe.dir_index) | |
16972 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
16973 | ||
16974 | if (!IS_ABSOLUTE_PATH (include_name) | |
16975 | && (dir_name != NULL || comp_dir != NULL)) | |
16976 | { | |
16977 | /* Avoid creating a duplicate psymtab for PST. | |
16978 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
16979 | Before we do the comparison, however, we need to account | |
16980 | for DIR_NAME and COMP_DIR. | |
16981 | First prepend dir_name (if non-NULL). If we still don't | |
16982 | have an absolute path prepend comp_dir (if non-NULL). | |
16983 | However, the directory we record in the include-file's | |
16984 | psymtab does not contain COMP_DIR (to match the | |
16985 | corresponding symtab(s)). | |
16986 | ||
16987 | Example: | |
16988 | ||
16989 | bash$ cd /tmp | |
16990 | bash$ gcc -g ./hello.c | |
16991 | include_name = "hello.c" | |
16992 | dir_name = "." | |
16993 | DW_AT_comp_dir = comp_dir = "/tmp" | |
16994 | DW_AT_name = "./hello.c" */ | |
16995 | ||
16996 | if (dir_name != NULL) | |
16997 | { | |
d521ce57 TT |
16998 | char *tem = concat (dir_name, SLASH_STRING, |
16999 | include_name, (char *)NULL); | |
17000 | ||
17001 | make_cleanup (xfree, tem); | |
17002 | include_name = tem; | |
c6da4cef | 17003 | include_name_to_compare = include_name; |
c6da4cef DE |
17004 | } |
17005 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
17006 | { | |
d521ce57 TT |
17007 | char *tem = concat (comp_dir, SLASH_STRING, |
17008 | include_name, (char *)NULL); | |
17009 | ||
17010 | make_cleanup (xfree, tem); | |
17011 | include_name_to_compare = tem; | |
c6da4cef DE |
17012 | } |
17013 | } | |
17014 | ||
17015 | pst_filename = pst->filename; | |
17016 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
17017 | { | |
72b9f47f TT |
17018 | copied_name = concat (pst->dirname, SLASH_STRING, |
17019 | pst_filename, (char *)NULL); | |
17020 | pst_filename = copied_name; | |
c6da4cef DE |
17021 | } |
17022 | ||
1e3fad37 | 17023 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 17024 | |
72b9f47f TT |
17025 | if (copied_name != NULL) |
17026 | xfree (copied_name); | |
c6da4cef DE |
17027 | |
17028 | if (file_is_pst) | |
17029 | return NULL; | |
17030 | return include_name; | |
17031 | } | |
17032 | ||
c91513d8 PP |
17033 | /* Ignore this record_line request. */ |
17034 | ||
17035 | static void | |
17036 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
17037 | { | |
17038 | return; | |
17039 | } | |
17040 | ||
f3f5162e DE |
17041 | /* Subroutine of dwarf_decode_lines to simplify it. |
17042 | Process the line number information in LH. */ | |
debd256d | 17043 | |
c906108c | 17044 | static void |
f3f5162e DE |
17045 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
17046 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 17047 | { |
d521ce57 TT |
17048 | const gdb_byte *line_ptr, *extended_end; |
17049 | const gdb_byte *line_end; | |
a8c50c1f | 17050 | unsigned int bytes_read, extended_len; |
c906108c | 17051 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
17052 | CORE_ADDR baseaddr; |
17053 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 17054 | bfd *abfd = objfile->obfd; |
fbf65064 | 17055 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 17056 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 17057 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
17058 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
17059 | = record_line; | |
e142c38c DJ |
17060 | |
17061 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17062 | |
debd256d JB |
17063 | line_ptr = lh->statement_program_start; |
17064 | line_end = lh->statement_program_end; | |
c906108c SS |
17065 | |
17066 | /* Read the statement sequences until there's nothing left. */ | |
17067 | while (line_ptr < line_end) | |
17068 | { | |
17069 | /* state machine registers */ | |
17070 | CORE_ADDR address = 0; | |
17071 | unsigned int file = 1; | |
17072 | unsigned int line = 1; | |
17073 | unsigned int column = 0; | |
debd256d | 17074 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
17075 | int basic_block = 0; |
17076 | int end_sequence = 0; | |
fbf65064 | 17077 | CORE_ADDR addr; |
2dc7f7b3 | 17078 | unsigned char op_index = 0; |
c906108c | 17079 | |
aaa75496 | 17080 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 17081 | { |
aaa75496 | 17082 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
17083 | /* lh->include_dirs and lh->file_names are 0-based, but the |
17084 | directory and file name numbers in the statement program | |
17085 | are 1-based. */ | |
17086 | struct file_entry *fe = &lh->file_names[file - 1]; | |
d521ce57 | 17087 | const char *dir = NULL; |
a738430d | 17088 | |
debd256d JB |
17089 | if (fe->dir_index) |
17090 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
17091 | |
17092 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
17093 | } |
17094 | ||
a738430d | 17095 | /* Decode the table. */ |
c5aa993b | 17096 | while (!end_sequence) |
c906108c SS |
17097 | { |
17098 | op_code = read_1_byte (abfd, line_ptr); | |
17099 | line_ptr += 1; | |
59205f5a JB |
17100 | if (line_ptr > line_end) |
17101 | { | |
17102 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
17103 | break; | |
17104 | } | |
9aa1fe7e | 17105 | |
debd256d | 17106 | if (op_code >= lh->opcode_base) |
6e70227d | 17107 | { |
a738430d | 17108 | /* Special operand. */ |
debd256d | 17109 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
17110 | address += (((op_index + (adj_opcode / lh->line_range)) |
17111 | / lh->maximum_ops_per_instruction) | |
17112 | * lh->minimum_instruction_length); | |
17113 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
17114 | % lh->maximum_ops_per_instruction); | |
debd256d | 17115 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 17116 | if (lh->num_file_names < file || file == 0) |
25e43795 | 17117 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
17118 | /* For now we ignore lines not starting on an |
17119 | instruction boundary. */ | |
17120 | else if (op_index == 0) | |
25e43795 DJ |
17121 | { |
17122 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 17123 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
17124 | { |
17125 | if (last_subfile != current_subfile) | |
17126 | { | |
17127 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17128 | if (last_subfile) | |
c91513d8 | 17129 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
17130 | last_subfile = current_subfile; |
17131 | } | |
25e43795 | 17132 | /* Append row to matrix using current values. */ |
7019d805 | 17133 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 17134 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 17135 | } |
25e43795 | 17136 | } |
ca5f395d | 17137 | basic_block = 0; |
9aa1fe7e GK |
17138 | } |
17139 | else switch (op_code) | |
c906108c SS |
17140 | { |
17141 | case DW_LNS_extended_op: | |
3e43a32a MS |
17142 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
17143 | &bytes_read); | |
473b7be6 | 17144 | line_ptr += bytes_read; |
a8c50c1f | 17145 | extended_end = line_ptr + extended_len; |
c906108c SS |
17146 | extended_op = read_1_byte (abfd, line_ptr); |
17147 | line_ptr += 1; | |
17148 | switch (extended_op) | |
17149 | { | |
17150 | case DW_LNE_end_sequence: | |
c91513d8 | 17151 | p_record_line = record_line; |
c906108c | 17152 | end_sequence = 1; |
c906108c SS |
17153 | break; |
17154 | case DW_LNE_set_address: | |
e7c27a73 | 17155 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
17156 | |
17157 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17158 | { | |
17159 | /* This line table is for a function which has been | |
17160 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
17161 | ||
17162 | long line_offset | |
36586728 | 17163 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
17164 | |
17165 | complaint (&symfile_complaints, | |
17166 | _(".debug_line address at offset 0x%lx is 0 " | |
17167 | "[in module %s]"), | |
4262abfb | 17168 | line_offset, objfile_name (objfile)); |
c91513d8 PP |
17169 | p_record_line = noop_record_line; |
17170 | } | |
17171 | ||
2dc7f7b3 | 17172 | op_index = 0; |
107d2387 AC |
17173 | line_ptr += bytes_read; |
17174 | address += baseaddr; | |
c906108c SS |
17175 | break; |
17176 | case DW_LNE_define_file: | |
debd256d | 17177 | { |
d521ce57 | 17178 | const char *cur_file; |
debd256d | 17179 | unsigned int dir_index, mod_time, length; |
6e70227d | 17180 | |
3e43a32a MS |
17181 | cur_file = read_direct_string (abfd, line_ptr, |
17182 | &bytes_read); | |
debd256d JB |
17183 | line_ptr += bytes_read; |
17184 | dir_index = | |
17185 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17186 | line_ptr += bytes_read; | |
17187 | mod_time = | |
17188 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17189 | line_ptr += bytes_read; | |
17190 | length = | |
17191 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17192 | line_ptr += bytes_read; | |
17193 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17194 | } | |
c906108c | 17195 | break; |
d0c6ba3d CC |
17196 | case DW_LNE_set_discriminator: |
17197 | /* The discriminator is not interesting to the debugger; | |
17198 | just ignore it. */ | |
17199 | line_ptr = extended_end; | |
17200 | break; | |
c906108c | 17201 | default: |
4d3c2250 | 17202 | complaint (&symfile_complaints, |
e2e0b3e5 | 17203 | _("mangled .debug_line section")); |
debd256d | 17204 | return; |
c906108c | 17205 | } |
a8c50c1f DJ |
17206 | /* Make sure that we parsed the extended op correctly. If e.g. |
17207 | we expected a different address size than the producer used, | |
17208 | we may have read the wrong number of bytes. */ | |
17209 | if (line_ptr != extended_end) | |
17210 | { | |
17211 | complaint (&symfile_complaints, | |
17212 | _("mangled .debug_line section")); | |
17213 | return; | |
17214 | } | |
c906108c SS |
17215 | break; |
17216 | case DW_LNS_copy: | |
59205f5a | 17217 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
17218 | dwarf2_debug_line_missing_file_complaint (); |
17219 | else | |
366da635 | 17220 | { |
25e43795 | 17221 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 17222 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
17223 | { |
17224 | if (last_subfile != current_subfile) | |
17225 | { | |
17226 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17227 | if (last_subfile) | |
c91513d8 | 17228 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
17229 | last_subfile = current_subfile; |
17230 | } | |
7019d805 | 17231 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 17232 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 17233 | } |
366da635 | 17234 | } |
c906108c SS |
17235 | basic_block = 0; |
17236 | break; | |
17237 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
17238 | { |
17239 | CORE_ADDR adjust | |
17240 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17241 | ||
17242 | address += (((op_index + adjust) | |
17243 | / lh->maximum_ops_per_instruction) | |
17244 | * lh->minimum_instruction_length); | |
17245 | op_index = ((op_index + adjust) | |
17246 | % lh->maximum_ops_per_instruction); | |
17247 | line_ptr += bytes_read; | |
17248 | } | |
c906108c SS |
17249 | break; |
17250 | case DW_LNS_advance_line: | |
17251 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
17252 | line_ptr += bytes_read; | |
17253 | break; | |
17254 | case DW_LNS_set_file: | |
debd256d | 17255 | { |
a738430d MK |
17256 | /* The arrays lh->include_dirs and lh->file_names are |
17257 | 0-based, but the directory and file name numbers in | |
17258 | the statement program are 1-based. */ | |
debd256d | 17259 | struct file_entry *fe; |
d521ce57 | 17260 | const char *dir = NULL; |
a738430d | 17261 | |
debd256d JB |
17262 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
17263 | line_ptr += bytes_read; | |
59205f5a | 17264 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
17265 | dwarf2_debug_line_missing_file_complaint (); |
17266 | else | |
17267 | { | |
17268 | fe = &lh->file_names[file - 1]; | |
17269 | if (fe->dir_index) | |
17270 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17271 | if (!decode_for_pst_p) | |
17272 | { | |
17273 | last_subfile = current_subfile; | |
17274 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
17275 | } | |
17276 | } | |
debd256d | 17277 | } |
c906108c SS |
17278 | break; |
17279 | case DW_LNS_set_column: | |
17280 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17281 | line_ptr += bytes_read; | |
17282 | break; | |
17283 | case DW_LNS_negate_stmt: | |
17284 | is_stmt = (!is_stmt); | |
17285 | break; | |
17286 | case DW_LNS_set_basic_block: | |
17287 | basic_block = 1; | |
17288 | break; | |
c2c6d25f JM |
17289 | /* Add to the address register of the state machine the |
17290 | address increment value corresponding to special opcode | |
a738430d MK |
17291 | 255. I.e., this value is scaled by the minimum |
17292 | instruction length since special opcode 255 would have | |
b021a221 | 17293 | scaled the increment. */ |
c906108c | 17294 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
17295 | { |
17296 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
17297 | ||
17298 | address += (((op_index + adjust) | |
17299 | / lh->maximum_ops_per_instruction) | |
17300 | * lh->minimum_instruction_length); | |
17301 | op_index = ((op_index + adjust) | |
17302 | % lh->maximum_ops_per_instruction); | |
17303 | } | |
c906108c SS |
17304 | break; |
17305 | case DW_LNS_fixed_advance_pc: | |
17306 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 17307 | op_index = 0; |
c906108c SS |
17308 | line_ptr += 2; |
17309 | break; | |
9aa1fe7e | 17310 | default: |
a738430d MK |
17311 | { |
17312 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 17313 | int i; |
a738430d | 17314 | |
debd256d | 17315 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
17316 | { |
17317 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17318 | line_ptr += bytes_read; | |
17319 | } | |
17320 | } | |
c906108c SS |
17321 | } |
17322 | } | |
59205f5a JB |
17323 | if (lh->num_file_names < file || file == 0) |
17324 | dwarf2_debug_line_missing_file_complaint (); | |
17325 | else | |
17326 | { | |
17327 | lh->file_names[file - 1].included_p = 1; | |
17328 | if (!decode_for_pst_p) | |
fbf65064 UW |
17329 | { |
17330 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 17331 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 17332 | } |
59205f5a | 17333 | } |
c906108c | 17334 | } |
f3f5162e DE |
17335 | } |
17336 | ||
17337 | /* Decode the Line Number Program (LNP) for the given line_header | |
17338 | structure and CU. The actual information extracted and the type | |
17339 | of structures created from the LNP depends on the value of PST. | |
17340 | ||
17341 | 1. If PST is NULL, then this procedure uses the data from the program | |
17342 | to create all necessary symbol tables, and their linetables. | |
17343 | ||
17344 | 2. If PST is not NULL, this procedure reads the program to determine | |
17345 | the list of files included by the unit represented by PST, and | |
17346 | builds all the associated partial symbol tables. | |
17347 | ||
17348 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17349 | It is used for relative paths in the line table. | |
17350 | NOTE: When processing partial symtabs (pst != NULL), | |
17351 | comp_dir == pst->dirname. | |
17352 | ||
17353 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
17354 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
17355 | symtab we don't use it in the name of the psymtabs we create. | |
17356 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
17357 | A good testcase for this is mb-inline.exp. */ | |
17358 | ||
17359 | static void | |
17360 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
17361 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
17362 | int want_line_info) | |
17363 | { | |
17364 | struct objfile *objfile = cu->objfile; | |
17365 | const int decode_for_pst_p = (pst != NULL); | |
17366 | struct subfile *first_subfile = current_subfile; | |
17367 | ||
17368 | if (want_line_info) | |
17369 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
17370 | |
17371 | if (decode_for_pst_p) | |
17372 | { | |
17373 | int file_index; | |
17374 | ||
17375 | /* Now that we're done scanning the Line Header Program, we can | |
17376 | create the psymtab of each included file. */ | |
17377 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
17378 | if (lh->file_names[file_index].included_p == 1) | |
17379 | { | |
d521ce57 | 17380 | const char *include_name = |
c6da4cef DE |
17381 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
17382 | if (include_name != NULL) | |
aaa75496 JB |
17383 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
17384 | } | |
17385 | } | |
cb1df416 DJ |
17386 | else |
17387 | { | |
17388 | /* Make sure a symtab is created for every file, even files | |
17389 | which contain only variables (i.e. no code with associated | |
17390 | line numbers). */ | |
cb1df416 | 17391 | int i; |
cb1df416 DJ |
17392 | |
17393 | for (i = 0; i < lh->num_file_names; i++) | |
17394 | { | |
d521ce57 | 17395 | const char *dir = NULL; |
f3f5162e | 17396 | struct file_entry *fe; |
9a619af0 | 17397 | |
cb1df416 DJ |
17398 | fe = &lh->file_names[i]; |
17399 | if (fe->dir_index) | |
17400 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17401 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
17402 | ||
17403 | /* Skip the main file; we don't need it, and it must be | |
17404 | allocated last, so that it will show up before the | |
17405 | non-primary symtabs in the objfile's symtab list. */ | |
17406 | if (current_subfile == first_subfile) | |
17407 | continue; | |
17408 | ||
17409 | if (current_subfile->symtab == NULL) | |
17410 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 17411 | objfile); |
cb1df416 DJ |
17412 | fe->symtab = current_subfile->symtab; |
17413 | } | |
17414 | } | |
c906108c SS |
17415 | } |
17416 | ||
17417 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
17418 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
17419 | or NULL if not known. COMP_DIR is the compilation directory for the |
17420 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
17421 | This routine tries to keep line numbers from identical absolute and |
17422 | relative file names in a common subfile. | |
17423 | ||
17424 | Using the `list' example from the GDB testsuite, which resides in | |
17425 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
17426 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
17427 | ||
c5aa993b JM |
17428 | DW_AT_name: /srcdir/list0.c |
17429 | DW_AT_comp_dir: /compdir | |
357e46e7 | 17430 | files.files[0].name: list0.h |
c5aa993b | 17431 | files.files[0].dir: /srcdir |
357e46e7 | 17432 | files.files[1].name: list0.c |
c5aa993b | 17433 | files.files[1].dir: /srcdir |
c906108c SS |
17434 | |
17435 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
17436 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
17437 | start_subfile will ensure that this happens provided that we pass the | |
17438 | concatenation of files.files[1].dir and files.files[1].name as the | |
17439 | subfile's name. */ | |
c906108c SS |
17440 | |
17441 | static void | |
d521ce57 | 17442 | dwarf2_start_subfile (const char *filename, const char *dirname, |
3e43a32a | 17443 | const char *comp_dir) |
c906108c | 17444 | { |
d521ce57 | 17445 | char *copy = NULL; |
4f1520fb FR |
17446 | |
17447 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
17448 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
17449 | second argument to start_subfile. To be consistent, we do the | |
17450 | same here. In order not to lose the line information directory, | |
17451 | we concatenate it to the filename when it makes sense. | |
17452 | Note that the Dwarf3 standard says (speaking of filenames in line | |
17453 | information): ``The directory index is ignored for file names | |
17454 | that represent full path names''. Thus ignoring dirname in the | |
17455 | `else' branch below isn't an issue. */ | |
c906108c | 17456 | |
d5166ae1 | 17457 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
17458 | { |
17459 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
17460 | filename = copy; | |
17461 | } | |
c906108c | 17462 | |
d521ce57 | 17463 | start_subfile (filename, comp_dir); |
4f1520fb | 17464 | |
d521ce57 TT |
17465 | if (copy != NULL) |
17466 | xfree (copy); | |
c906108c SS |
17467 | } |
17468 | ||
f4dc4d17 DE |
17469 | /* Start a symtab for DWARF. |
17470 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
17471 | ||
17472 | static void | |
17473 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15d034d0 | 17474 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 DE |
17475 | { |
17476 | start_symtab (name, comp_dir, low_pc); | |
17477 | record_debugformat ("DWARF 2"); | |
17478 | record_producer (cu->producer); | |
17479 | ||
17480 | /* We assume that we're processing GCC output. */ | |
17481 | processing_gcc_compilation = 2; | |
17482 | ||
4d4ec4e5 | 17483 | cu->processing_has_namespace_info = 0; |
f4dc4d17 DE |
17484 | } |
17485 | ||
4c2df51b DJ |
17486 | static void |
17487 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 17488 | struct dwarf2_cu *cu) |
4c2df51b | 17489 | { |
e7c27a73 DJ |
17490 | struct objfile *objfile = cu->objfile; |
17491 | struct comp_unit_head *cu_header = &cu->header; | |
17492 | ||
4c2df51b DJ |
17493 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
17494 | code here to turn a symbol with DW_AT_external and a | |
17495 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
17496 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
17497 | with some versions of binutils) where shared libraries could have | |
17498 | relocations against symbols in their debug information - the | |
17499 | minimal symbol would have the right address, but the debug info | |
17500 | would not. It's no longer necessary, because we will explicitly | |
17501 | apply relocations when we read in the debug information now. */ | |
17502 | ||
17503 | /* A DW_AT_location attribute with no contents indicates that a | |
17504 | variable has been optimized away. */ | |
17505 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
17506 | { | |
f1e6e072 | 17507 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
17508 | return; |
17509 | } | |
17510 | ||
17511 | /* Handle one degenerate form of location expression specially, to | |
17512 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
17513 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
17514 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
17515 | |
17516 | if (attr_form_is_block (attr) | |
3019eac3 DE |
17517 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
17518 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
17519 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
17520 | && (DW_BLOCK (attr)->size | |
17521 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 17522 | { |
891d2f0b | 17523 | unsigned int dummy; |
4c2df51b | 17524 | |
3019eac3 DE |
17525 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
17526 | SYMBOL_VALUE_ADDRESS (sym) = | |
17527 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
17528 | else | |
17529 | SYMBOL_VALUE_ADDRESS (sym) = | |
17530 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 17531 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
17532 | fixup_symbol_section (sym, objfile); |
17533 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
17534 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
17535 | return; |
17536 | } | |
17537 | ||
17538 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
17539 | expression evaluator, and use LOC_COMPUTED only when necessary | |
17540 | (i.e. when the value of a register or memory location is | |
17541 | referenced, or a thread-local block, etc.). Then again, it might | |
17542 | not be worthwhile. I'm assuming that it isn't unless performance | |
17543 | or memory numbers show me otherwise. */ | |
17544 | ||
f1e6e072 | 17545 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 17546 | |
f1e6e072 | 17547 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 17548 | cu->has_loclist = 1; |
4c2df51b DJ |
17549 | } |
17550 | ||
c906108c SS |
17551 | /* Given a pointer to a DWARF information entry, figure out if we need |
17552 | to make a symbol table entry for it, and if so, create a new entry | |
17553 | and return a pointer to it. | |
17554 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
17555 | used the passed type. |
17556 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
17557 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
17558 | |
17559 | static struct symbol * | |
34eaf542 TT |
17560 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
17561 | struct symbol *space) | |
c906108c | 17562 | { |
e7c27a73 | 17563 | struct objfile *objfile = cu->objfile; |
c906108c | 17564 | struct symbol *sym = NULL; |
15d034d0 | 17565 | const char *name; |
c906108c SS |
17566 | struct attribute *attr = NULL; |
17567 | struct attribute *attr2 = NULL; | |
e142c38c | 17568 | CORE_ADDR baseaddr; |
e37fd15a SW |
17569 | struct pending **list_to_add = NULL; |
17570 | ||
edb3359d | 17571 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
17572 | |
17573 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17574 | |
94af9270 | 17575 | name = dwarf2_name (die, cu); |
c906108c SS |
17576 | if (name) |
17577 | { | |
94af9270 | 17578 | const char *linkagename; |
34eaf542 | 17579 | int suppress_add = 0; |
94af9270 | 17580 | |
34eaf542 TT |
17581 | if (space) |
17582 | sym = space; | |
17583 | else | |
e623cf5d | 17584 | sym = allocate_symbol (objfile); |
c906108c | 17585 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
17586 | |
17587 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 17588 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
17589 | linkagename = dwarf2_physname (name, die, cu); |
17590 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 17591 | |
f55ee35c JK |
17592 | /* Fortran does not have mangling standard and the mangling does differ |
17593 | between gfortran, iFort etc. */ | |
17594 | if (cu->language == language_fortran | |
b250c185 | 17595 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 17596 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 17597 | dwarf2_full_name (name, die, cu), |
29df156d | 17598 | NULL); |
f55ee35c | 17599 | |
c906108c | 17600 | /* Default assumptions. |
c5aa993b | 17601 | Use the passed type or decode it from the die. */ |
176620f1 | 17602 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 17603 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
17604 | if (type != NULL) |
17605 | SYMBOL_TYPE (sym) = type; | |
17606 | else | |
e7c27a73 | 17607 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
17608 | attr = dwarf2_attr (die, |
17609 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
17610 | cu); | |
c906108c SS |
17611 | if (attr) |
17612 | { | |
17613 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
17614 | } | |
cb1df416 | 17615 | |
edb3359d DJ |
17616 | attr = dwarf2_attr (die, |
17617 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
17618 | cu); | |
cb1df416 DJ |
17619 | if (attr) |
17620 | { | |
17621 | int file_index = DW_UNSND (attr); | |
9a619af0 | 17622 | |
cb1df416 DJ |
17623 | if (cu->line_header == NULL |
17624 | || file_index > cu->line_header->num_file_names) | |
17625 | complaint (&symfile_complaints, | |
17626 | _("file index out of range")); | |
1c3d648d | 17627 | else if (file_index > 0) |
cb1df416 DJ |
17628 | { |
17629 | struct file_entry *fe; | |
9a619af0 | 17630 | |
cb1df416 DJ |
17631 | fe = &cu->line_header->file_names[file_index - 1]; |
17632 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
17633 | } | |
17634 | } | |
17635 | ||
c906108c SS |
17636 | switch (die->tag) |
17637 | { | |
17638 | case DW_TAG_label: | |
e142c38c | 17639 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 17640 | if (attr) |
31aa7e4e JB |
17641 | SYMBOL_VALUE_ADDRESS (sym) |
17642 | = attr_value_as_address (attr) + baseaddr; | |
0f5238ed TT |
17643 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
17644 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 17645 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 17646 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
17647 | break; |
17648 | case DW_TAG_subprogram: | |
17649 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
17650 | finish_block. */ | |
f1e6e072 | 17651 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 17652 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
17653 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
17654 | || cu->language == language_ada) | |
c906108c | 17655 | { |
2cfa0c8d JB |
17656 | /* Subprograms marked external are stored as a global symbol. |
17657 | Ada subprograms, whether marked external or not, are always | |
17658 | stored as a global symbol, because we want to be able to | |
17659 | access them globally. For instance, we want to be able | |
17660 | to break on a nested subprogram without having to | |
17661 | specify the context. */ | |
e37fd15a | 17662 | list_to_add = &global_symbols; |
c906108c SS |
17663 | } |
17664 | else | |
17665 | { | |
e37fd15a | 17666 | list_to_add = cu->list_in_scope; |
c906108c SS |
17667 | } |
17668 | break; | |
edb3359d DJ |
17669 | case DW_TAG_inlined_subroutine: |
17670 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
17671 | finish_block. */ | |
f1e6e072 | 17672 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 17673 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 17674 | list_to_add = cu->list_in_scope; |
edb3359d | 17675 | break; |
34eaf542 TT |
17676 | case DW_TAG_template_value_param: |
17677 | suppress_add = 1; | |
17678 | /* Fall through. */ | |
72929c62 | 17679 | case DW_TAG_constant: |
c906108c | 17680 | case DW_TAG_variable: |
254e6b9e | 17681 | case DW_TAG_member: |
0963b4bd MS |
17682 | /* Compilation with minimal debug info may result in |
17683 | variables with missing type entries. Change the | |
17684 | misleading `void' type to something sensible. */ | |
c906108c | 17685 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 17686 | SYMBOL_TYPE (sym) |
46bf5051 | 17687 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 17688 | |
e142c38c | 17689 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
17690 | /* In the case of DW_TAG_member, we should only be called for |
17691 | static const members. */ | |
17692 | if (die->tag == DW_TAG_member) | |
17693 | { | |
3863f96c DE |
17694 | /* dwarf2_add_field uses die_is_declaration, |
17695 | so we do the same. */ | |
254e6b9e DE |
17696 | gdb_assert (die_is_declaration (die, cu)); |
17697 | gdb_assert (attr); | |
17698 | } | |
c906108c SS |
17699 | if (attr) |
17700 | { | |
e7c27a73 | 17701 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 17702 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 17703 | if (!suppress_add) |
34eaf542 TT |
17704 | { |
17705 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 17706 | list_to_add = &global_symbols; |
34eaf542 | 17707 | else |
e37fd15a | 17708 | list_to_add = cu->list_in_scope; |
34eaf542 | 17709 | } |
c906108c SS |
17710 | break; |
17711 | } | |
e142c38c | 17712 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
17713 | if (attr) |
17714 | { | |
e7c27a73 | 17715 | var_decode_location (attr, sym, cu); |
e142c38c | 17716 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
17717 | |
17718 | /* Fortran explicitly imports any global symbols to the local | |
17719 | scope by DW_TAG_common_block. */ | |
17720 | if (cu->language == language_fortran && die->parent | |
17721 | && die->parent->tag == DW_TAG_common_block) | |
17722 | attr2 = NULL; | |
17723 | ||
caac4577 JG |
17724 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
17725 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
17726 | && !dwarf2_per_objfile->has_section_at_zero) | |
17727 | { | |
17728 | /* When a static variable is eliminated by the linker, | |
17729 | the corresponding debug information is not stripped | |
17730 | out, but the variable address is set to null; | |
17731 | do not add such variables into symbol table. */ | |
17732 | } | |
17733 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 17734 | { |
f55ee35c JK |
17735 | /* Workaround gfortran PR debug/40040 - it uses |
17736 | DW_AT_location for variables in -fPIC libraries which may | |
17737 | get overriden by other libraries/executable and get | |
17738 | a different address. Resolve it by the minimal symbol | |
17739 | which may come from inferior's executable using copy | |
17740 | relocation. Make this workaround only for gfortran as for | |
17741 | other compilers GDB cannot guess the minimal symbol | |
17742 | Fortran mangling kind. */ | |
17743 | if (cu->language == language_fortran && die->parent | |
17744 | && die->parent->tag == DW_TAG_module | |
17745 | && cu->producer | |
17746 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
f1e6e072 | 17747 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 17748 | |
1c809c68 TT |
17749 | /* A variable with DW_AT_external is never static, |
17750 | but it may be block-scoped. */ | |
17751 | list_to_add = (cu->list_in_scope == &file_symbols | |
17752 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 17753 | } |
c906108c | 17754 | else |
e37fd15a | 17755 | list_to_add = cu->list_in_scope; |
c906108c SS |
17756 | } |
17757 | else | |
17758 | { | |
17759 | /* We do not know the address of this symbol. | |
c5aa993b JM |
17760 | If it is an external symbol and we have type information |
17761 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
17762 | The address of the variable will then be determined from | |
17763 | the minimal symbol table whenever the variable is | |
17764 | referenced. */ | |
e142c38c | 17765 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
17766 | |
17767 | /* Fortran explicitly imports any global symbols to the local | |
17768 | scope by DW_TAG_common_block. */ | |
17769 | if (cu->language == language_fortran && die->parent | |
17770 | && die->parent->tag == DW_TAG_common_block) | |
17771 | { | |
17772 | /* SYMBOL_CLASS doesn't matter here because | |
17773 | read_common_block is going to reset it. */ | |
17774 | if (!suppress_add) | |
17775 | list_to_add = cu->list_in_scope; | |
17776 | } | |
17777 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
17778 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 17779 | { |
0fe7935b DJ |
17780 | /* A variable with DW_AT_external is never static, but it |
17781 | may be block-scoped. */ | |
17782 | list_to_add = (cu->list_in_scope == &file_symbols | |
17783 | ? &global_symbols : cu->list_in_scope); | |
17784 | ||
f1e6e072 | 17785 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 17786 | } |
442ddf59 JK |
17787 | else if (!die_is_declaration (die, cu)) |
17788 | { | |
17789 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
17790 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
17791 | if (!suppress_add) |
17792 | list_to_add = cu->list_in_scope; | |
442ddf59 | 17793 | } |
c906108c SS |
17794 | } |
17795 | break; | |
17796 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
17797 | /* If we are inside a function, mark this as an argument. If |
17798 | not, we might be looking at an argument to an inlined function | |
17799 | when we do not have enough information to show inlined frames; | |
17800 | pretend it's a local variable in that case so that the user can | |
17801 | still see it. */ | |
17802 | if (context_stack_depth > 0 | |
17803 | && context_stack[context_stack_depth - 1].name != NULL) | |
17804 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 17805 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
17806 | if (attr) |
17807 | { | |
e7c27a73 | 17808 | var_decode_location (attr, sym, cu); |
c906108c | 17809 | } |
e142c38c | 17810 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
17811 | if (attr) |
17812 | { | |
e7c27a73 | 17813 | dwarf2_const_value (attr, sym, cu); |
c906108c | 17814 | } |
f346a30d | 17815 | |
e37fd15a | 17816 | list_to_add = cu->list_in_scope; |
c906108c SS |
17817 | break; |
17818 | case DW_TAG_unspecified_parameters: | |
17819 | /* From varargs functions; gdb doesn't seem to have any | |
17820 | interest in this information, so just ignore it for now. | |
17821 | (FIXME?) */ | |
17822 | break; | |
34eaf542 TT |
17823 | case DW_TAG_template_type_param: |
17824 | suppress_add = 1; | |
17825 | /* Fall through. */ | |
c906108c | 17826 | case DW_TAG_class_type: |
680b30c7 | 17827 | case DW_TAG_interface_type: |
c906108c SS |
17828 | case DW_TAG_structure_type: |
17829 | case DW_TAG_union_type: | |
72019c9c | 17830 | case DW_TAG_set_type: |
c906108c | 17831 | case DW_TAG_enumeration_type: |
f1e6e072 | 17832 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 17833 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 17834 | |
63d06c5c | 17835 | { |
987504bb | 17836 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
17837 | really ever be static objects: otherwise, if you try |
17838 | to, say, break of a class's method and you're in a file | |
17839 | which doesn't mention that class, it won't work unless | |
17840 | the check for all static symbols in lookup_symbol_aux | |
17841 | saves you. See the OtherFileClass tests in | |
17842 | gdb.c++/namespace.exp. */ | |
17843 | ||
e37fd15a | 17844 | if (!suppress_add) |
34eaf542 | 17845 | { |
34eaf542 TT |
17846 | list_to_add = (cu->list_in_scope == &file_symbols |
17847 | && (cu->language == language_cplus | |
17848 | || cu->language == language_java) | |
17849 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 17850 | |
64382290 TT |
17851 | /* The semantics of C++ state that "struct foo { |
17852 | ... }" also defines a typedef for "foo". A Java | |
17853 | class declaration also defines a typedef for the | |
17854 | class. */ | |
17855 | if (cu->language == language_cplus | |
17856 | || cu->language == language_java | |
17857 | || cu->language == language_ada) | |
17858 | { | |
17859 | /* The symbol's name is already allocated along | |
17860 | with this objfile, so we don't need to | |
17861 | duplicate it for the type. */ | |
17862 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
17863 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
17864 | } | |
63d06c5c DC |
17865 | } |
17866 | } | |
c906108c SS |
17867 | break; |
17868 | case DW_TAG_typedef: | |
f1e6e072 | 17869 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 17870 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 17871 | list_to_add = cu->list_in_scope; |
63d06c5c | 17872 | break; |
c906108c | 17873 | case DW_TAG_base_type: |
a02abb62 | 17874 | case DW_TAG_subrange_type: |
f1e6e072 | 17875 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 17876 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 17877 | list_to_add = cu->list_in_scope; |
c906108c SS |
17878 | break; |
17879 | case DW_TAG_enumerator: | |
e142c38c | 17880 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
17881 | if (attr) |
17882 | { | |
e7c27a73 | 17883 | dwarf2_const_value (attr, sym, cu); |
c906108c | 17884 | } |
63d06c5c DC |
17885 | { |
17886 | /* NOTE: carlton/2003-11-10: See comment above in the | |
17887 | DW_TAG_class_type, etc. block. */ | |
17888 | ||
e142c38c | 17889 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
17890 | && (cu->language == language_cplus |
17891 | || cu->language == language_java) | |
e142c38c | 17892 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 17893 | } |
c906108c | 17894 | break; |
74921315 | 17895 | case DW_TAG_imported_declaration: |
5c4e30ca | 17896 | case DW_TAG_namespace: |
f1e6e072 | 17897 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 17898 | list_to_add = &global_symbols; |
5c4e30ca | 17899 | break; |
530e8392 KB |
17900 | case DW_TAG_module: |
17901 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
17902 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
17903 | list_to_add = &global_symbols; | |
17904 | break; | |
4357ac6c | 17905 | case DW_TAG_common_block: |
f1e6e072 | 17906 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
17907 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
17908 | add_symbol_to_list (sym, cu->list_in_scope); | |
17909 | break; | |
c906108c SS |
17910 | default: |
17911 | /* Not a tag we recognize. Hopefully we aren't processing | |
17912 | trash data, but since we must specifically ignore things | |
17913 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 17914 | this point. */ |
e2e0b3e5 | 17915 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 17916 | dwarf_tag_name (die->tag)); |
c906108c SS |
17917 | break; |
17918 | } | |
df8a16a1 | 17919 | |
e37fd15a SW |
17920 | if (suppress_add) |
17921 | { | |
17922 | sym->hash_next = objfile->template_symbols; | |
17923 | objfile->template_symbols = sym; | |
17924 | list_to_add = NULL; | |
17925 | } | |
17926 | ||
17927 | if (list_to_add != NULL) | |
17928 | add_symbol_to_list (sym, list_to_add); | |
17929 | ||
df8a16a1 DJ |
17930 | /* For the benefit of old versions of GCC, check for anonymous |
17931 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 17932 | if (!cu->processing_has_namespace_info |
94af9270 | 17933 | && cu->language == language_cplus) |
a10964d1 | 17934 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
17935 | } |
17936 | return (sym); | |
17937 | } | |
17938 | ||
34eaf542 TT |
17939 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
17940 | ||
17941 | static struct symbol * | |
17942 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
17943 | { | |
17944 | return new_symbol_full (die, type, cu, NULL); | |
17945 | } | |
17946 | ||
98bfdba5 PA |
17947 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
17948 | zero-extend it as appropriate for the symbol's type. The DWARF | |
17949 | standard (v4) is not entirely clear about the meaning of using | |
17950 | DW_FORM_dataN for a constant with a signed type, where the type is | |
17951 | wider than the data. The conclusion of a discussion on the DWARF | |
17952 | list was that this is unspecified. We choose to always zero-extend | |
17953 | because that is the interpretation long in use by GCC. */ | |
c906108c | 17954 | |
98bfdba5 | 17955 | static gdb_byte * |
ff39bb5e | 17956 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 17957 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 17958 | { |
e7c27a73 | 17959 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
17960 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
17961 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
17962 | LONGEST l = DW_UNSND (attr); |
17963 | ||
17964 | if (bits < sizeof (*value) * 8) | |
17965 | { | |
17966 | l &= ((LONGEST) 1 << bits) - 1; | |
17967 | *value = l; | |
17968 | } | |
17969 | else if (bits == sizeof (*value) * 8) | |
17970 | *value = l; | |
17971 | else | |
17972 | { | |
17973 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
17974 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
17975 | return bytes; | |
17976 | } | |
17977 | ||
17978 | return NULL; | |
17979 | } | |
17980 | ||
17981 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
17982 | the value does not fit in *VALUE, set *BYTES - either already | |
17983 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
17984 | or, set *BATON, if we translated the constant to a location | |
17985 | expression. */ | |
17986 | ||
17987 | static void | |
ff39bb5e | 17988 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
17989 | const char *name, struct obstack *obstack, |
17990 | struct dwarf2_cu *cu, | |
d521ce57 | 17991 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
17992 | struct dwarf2_locexpr_baton **baton) |
17993 | { | |
17994 | struct objfile *objfile = cu->objfile; | |
17995 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 17996 | struct dwarf_block *blk; |
98bfdba5 PA |
17997 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
17998 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
17999 | ||
18000 | *value = 0; | |
18001 | *bytes = NULL; | |
18002 | *baton = NULL; | |
c906108c SS |
18003 | |
18004 | switch (attr->form) | |
18005 | { | |
18006 | case DW_FORM_addr: | |
3019eac3 | 18007 | case DW_FORM_GNU_addr_index: |
ac56253d | 18008 | { |
ac56253d TT |
18009 | gdb_byte *data; |
18010 | ||
98bfdba5 PA |
18011 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
18012 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 18013 | cu_header->addr_size, |
98bfdba5 | 18014 | TYPE_LENGTH (type)); |
ac56253d TT |
18015 | /* Symbols of this form are reasonably rare, so we just |
18016 | piggyback on the existing location code rather than writing | |
18017 | a new implementation of symbol_computed_ops. */ | |
7919a973 | 18018 | *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton)); |
98bfdba5 PA |
18019 | (*baton)->per_cu = cu->per_cu; |
18020 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 18021 | |
98bfdba5 | 18022 | (*baton)->size = 2 + cu_header->addr_size; |
7919a973 | 18023 | data = obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 18024 | (*baton)->data = data; |
ac56253d TT |
18025 | |
18026 | data[0] = DW_OP_addr; | |
18027 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
18028 | byte_order, DW_ADDR (attr)); | |
18029 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 18030 | } |
c906108c | 18031 | break; |
4ac36638 | 18032 | case DW_FORM_string: |
93b5768b | 18033 | case DW_FORM_strp: |
3019eac3 | 18034 | case DW_FORM_GNU_str_index: |
36586728 | 18035 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
18036 | /* DW_STRING is already allocated on the objfile obstack, point |
18037 | directly to it. */ | |
d521ce57 | 18038 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 18039 | break; |
c906108c SS |
18040 | case DW_FORM_block1: |
18041 | case DW_FORM_block2: | |
18042 | case DW_FORM_block4: | |
18043 | case DW_FORM_block: | |
2dc7f7b3 | 18044 | case DW_FORM_exprloc: |
c906108c | 18045 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
18046 | if (TYPE_LENGTH (type) != blk->size) |
18047 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
18048 | TYPE_LENGTH (type)); | |
18049 | *bytes = blk->data; | |
c906108c | 18050 | break; |
2df3850c JM |
18051 | |
18052 | /* The DW_AT_const_value attributes are supposed to carry the | |
18053 | symbol's value "represented as it would be on the target | |
18054 | architecture." By the time we get here, it's already been | |
18055 | converted to host endianness, so we just need to sign- or | |
18056 | zero-extend it as appropriate. */ | |
18057 | case DW_FORM_data1: | |
3aef2284 | 18058 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 18059 | break; |
c906108c | 18060 | case DW_FORM_data2: |
3aef2284 | 18061 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 18062 | break; |
c906108c | 18063 | case DW_FORM_data4: |
3aef2284 | 18064 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 18065 | break; |
c906108c | 18066 | case DW_FORM_data8: |
3aef2284 | 18067 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
18068 | break; |
18069 | ||
c906108c | 18070 | case DW_FORM_sdata: |
98bfdba5 | 18071 | *value = DW_SND (attr); |
2df3850c JM |
18072 | break; |
18073 | ||
c906108c | 18074 | case DW_FORM_udata: |
98bfdba5 | 18075 | *value = DW_UNSND (attr); |
c906108c | 18076 | break; |
2df3850c | 18077 | |
c906108c | 18078 | default: |
4d3c2250 | 18079 | complaint (&symfile_complaints, |
e2e0b3e5 | 18080 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 18081 | dwarf_form_name (attr->form)); |
98bfdba5 | 18082 | *value = 0; |
c906108c SS |
18083 | break; |
18084 | } | |
18085 | } | |
18086 | ||
2df3850c | 18087 | |
98bfdba5 PA |
18088 | /* Copy constant value from an attribute to a symbol. */ |
18089 | ||
2df3850c | 18090 | static void |
ff39bb5e | 18091 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 18092 | struct dwarf2_cu *cu) |
2df3850c | 18093 | { |
98bfdba5 PA |
18094 | struct objfile *objfile = cu->objfile; |
18095 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 18096 | LONGEST value; |
d521ce57 | 18097 | const gdb_byte *bytes; |
98bfdba5 | 18098 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 18099 | |
98bfdba5 PA |
18100 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
18101 | SYMBOL_PRINT_NAME (sym), | |
18102 | &objfile->objfile_obstack, cu, | |
18103 | &value, &bytes, &baton); | |
2df3850c | 18104 | |
98bfdba5 PA |
18105 | if (baton != NULL) |
18106 | { | |
98bfdba5 | 18107 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 18108 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
18109 | } |
18110 | else if (bytes != NULL) | |
18111 | { | |
18112 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 18113 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
18114 | } |
18115 | else | |
18116 | { | |
18117 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 18118 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 18119 | } |
2df3850c JM |
18120 | } |
18121 | ||
c906108c SS |
18122 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
18123 | ||
18124 | static struct type * | |
e7c27a73 | 18125 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18126 | { |
c906108c | 18127 | struct attribute *type_attr; |
c906108c | 18128 | |
e142c38c | 18129 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
18130 | if (!type_attr) |
18131 | { | |
18132 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 18133 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 18134 | } |
348e048f | 18135 | |
673bfd45 | 18136 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18137 | } |
18138 | ||
b4ba55a1 JB |
18139 | /* True iff CU's producer generates GNAT Ada auxiliary information |
18140 | that allows to find parallel types through that information instead | |
18141 | of having to do expensive parallel lookups by type name. */ | |
18142 | ||
18143 | static int | |
18144 | need_gnat_info (struct dwarf2_cu *cu) | |
18145 | { | |
18146 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
18147 | of GNAT produces this auxiliary information, without any indication | |
18148 | that it is produced. Part of enhancing the FSF version of GNAT | |
18149 | to produce that information will be to put in place an indicator | |
18150 | that we can use in order to determine whether the descriptive type | |
18151 | info is available or not. One suggestion that has been made is | |
18152 | to use a new attribute, attached to the CU die. For now, assume | |
18153 | that the descriptive type info is not available. */ | |
18154 | return 0; | |
18155 | } | |
18156 | ||
b4ba55a1 JB |
18157 | /* Return the auxiliary type of the die in question using its |
18158 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
18159 | attribute is not present. */ | |
18160 | ||
18161 | static struct type * | |
18162 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
18163 | { | |
b4ba55a1 | 18164 | struct attribute *type_attr; |
b4ba55a1 JB |
18165 | |
18166 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
18167 | if (!type_attr) | |
18168 | return NULL; | |
18169 | ||
673bfd45 | 18170 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
18171 | } |
18172 | ||
18173 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
18174 | descriptive type accordingly. */ | |
18175 | ||
18176 | static void | |
18177 | set_descriptive_type (struct type *type, struct die_info *die, | |
18178 | struct dwarf2_cu *cu) | |
18179 | { | |
18180 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
18181 | ||
18182 | if (descriptive_type) | |
18183 | { | |
18184 | ALLOCATE_GNAT_AUX_TYPE (type); | |
18185 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
18186 | } | |
18187 | } | |
18188 | ||
c906108c SS |
18189 | /* Return the containing type of the die in question using its |
18190 | DW_AT_containing_type attribute. */ | |
18191 | ||
18192 | static struct type * | |
e7c27a73 | 18193 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18194 | { |
c906108c | 18195 | struct attribute *type_attr; |
c906108c | 18196 | |
e142c38c | 18197 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
18198 | if (!type_attr) |
18199 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 18200 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 18201 | |
673bfd45 | 18202 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18203 | } |
18204 | ||
ac9ec31b DE |
18205 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
18206 | ||
18207 | static struct type * | |
18208 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
18209 | { | |
18210 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18211 | char *message, *saved; | |
18212 | ||
18213 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 18214 | objfile_name (objfile), |
ac9ec31b DE |
18215 | cu->header.offset.sect_off, |
18216 | die->offset.sect_off); | |
18217 | saved = obstack_copy0 (&objfile->objfile_obstack, | |
18218 | message, strlen (message)); | |
18219 | xfree (message); | |
18220 | ||
18221 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
18222 | } | |
18223 | ||
673bfd45 | 18224 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
18225 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
18226 | DW_AT_containing_type. | |
673bfd45 DE |
18227 | If there is no type substitute an error marker. */ |
18228 | ||
c906108c | 18229 | static struct type * |
ff39bb5e | 18230 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 18231 | struct dwarf2_cu *cu) |
c906108c | 18232 | { |
bb5ed363 | 18233 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
18234 | struct type *this_type; |
18235 | ||
ac9ec31b DE |
18236 | gdb_assert (attr->name == DW_AT_type |
18237 | || attr->name == DW_AT_GNAT_descriptive_type | |
18238 | || attr->name == DW_AT_containing_type); | |
18239 | ||
673bfd45 DE |
18240 | /* First see if we have it cached. */ |
18241 | ||
36586728 TT |
18242 | if (attr->form == DW_FORM_GNU_ref_alt) |
18243 | { | |
18244 | struct dwarf2_per_cu_data *per_cu; | |
18245 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
18246 | ||
18247 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
18248 | this_type = get_die_type_at_offset (offset, per_cu); | |
18249 | } | |
7771576e | 18250 | else if (attr_form_is_ref (attr)) |
673bfd45 | 18251 | { |
b64f50a1 | 18252 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
18253 | |
18254 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
18255 | } | |
55f1336d | 18256 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 18257 | { |
ac9ec31b | 18258 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 18259 | |
ac9ec31b | 18260 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
18261 | } |
18262 | else | |
18263 | { | |
ac9ec31b DE |
18264 | complaint (&symfile_complaints, |
18265 | _("Dwarf Error: Bad type attribute %s in DIE" | |
18266 | " at 0x%x [in module %s]"), | |
18267 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 18268 | objfile_name (objfile)); |
ac9ec31b | 18269 | return build_error_marker_type (cu, die); |
673bfd45 DE |
18270 | } |
18271 | ||
18272 | /* If not cached we need to read it in. */ | |
18273 | ||
18274 | if (this_type == NULL) | |
18275 | { | |
ac9ec31b | 18276 | struct die_info *type_die = NULL; |
673bfd45 DE |
18277 | struct dwarf2_cu *type_cu = cu; |
18278 | ||
7771576e | 18279 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
18280 | type_die = follow_die_ref (die, attr, &type_cu); |
18281 | if (type_die == NULL) | |
18282 | return build_error_marker_type (cu, die); | |
18283 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
18284 | from an inter-CU reference and the type's CU got expanded before |
18285 | ours. */ | |
ac9ec31b | 18286 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
18287 | } |
18288 | ||
18289 | /* If we still don't have a type use an error marker. */ | |
18290 | ||
18291 | if (this_type == NULL) | |
ac9ec31b | 18292 | return build_error_marker_type (cu, die); |
673bfd45 | 18293 | |
f792889a | 18294 | return this_type; |
c906108c SS |
18295 | } |
18296 | ||
673bfd45 DE |
18297 | /* Return the type in DIE, CU. |
18298 | Returns NULL for invalid types. | |
18299 | ||
02142a6c | 18300 | This first does a lookup in die_type_hash, |
673bfd45 DE |
18301 | and only reads the die in if necessary. |
18302 | ||
18303 | NOTE: This can be called when reading in partial or full symbols. */ | |
18304 | ||
f792889a | 18305 | static struct type * |
e7c27a73 | 18306 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18307 | { |
f792889a DJ |
18308 | struct type *this_type; |
18309 | ||
18310 | this_type = get_die_type (die, cu); | |
18311 | if (this_type) | |
18312 | return this_type; | |
18313 | ||
673bfd45 DE |
18314 | return read_type_die_1 (die, cu); |
18315 | } | |
18316 | ||
18317 | /* Read the type in DIE, CU. | |
18318 | Returns NULL for invalid types. */ | |
18319 | ||
18320 | static struct type * | |
18321 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
18322 | { | |
18323 | struct type *this_type = NULL; | |
18324 | ||
c906108c SS |
18325 | switch (die->tag) |
18326 | { | |
18327 | case DW_TAG_class_type: | |
680b30c7 | 18328 | case DW_TAG_interface_type: |
c906108c SS |
18329 | case DW_TAG_structure_type: |
18330 | case DW_TAG_union_type: | |
f792889a | 18331 | this_type = read_structure_type (die, cu); |
c906108c SS |
18332 | break; |
18333 | case DW_TAG_enumeration_type: | |
f792889a | 18334 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
18335 | break; |
18336 | case DW_TAG_subprogram: | |
18337 | case DW_TAG_subroutine_type: | |
edb3359d | 18338 | case DW_TAG_inlined_subroutine: |
f792889a | 18339 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
18340 | break; |
18341 | case DW_TAG_array_type: | |
f792889a | 18342 | this_type = read_array_type (die, cu); |
c906108c | 18343 | break; |
72019c9c | 18344 | case DW_TAG_set_type: |
f792889a | 18345 | this_type = read_set_type (die, cu); |
72019c9c | 18346 | break; |
c906108c | 18347 | case DW_TAG_pointer_type: |
f792889a | 18348 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
18349 | break; |
18350 | case DW_TAG_ptr_to_member_type: | |
f792889a | 18351 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
18352 | break; |
18353 | case DW_TAG_reference_type: | |
f792889a | 18354 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
18355 | break; |
18356 | case DW_TAG_const_type: | |
f792889a | 18357 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
18358 | break; |
18359 | case DW_TAG_volatile_type: | |
f792889a | 18360 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 18361 | break; |
06d66ee9 TT |
18362 | case DW_TAG_restrict_type: |
18363 | this_type = read_tag_restrict_type (die, cu); | |
18364 | break; | |
c906108c | 18365 | case DW_TAG_string_type: |
f792889a | 18366 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
18367 | break; |
18368 | case DW_TAG_typedef: | |
f792889a | 18369 | this_type = read_typedef (die, cu); |
c906108c | 18370 | break; |
a02abb62 | 18371 | case DW_TAG_subrange_type: |
f792889a | 18372 | this_type = read_subrange_type (die, cu); |
a02abb62 | 18373 | break; |
c906108c | 18374 | case DW_TAG_base_type: |
f792889a | 18375 | this_type = read_base_type (die, cu); |
c906108c | 18376 | break; |
81a17f79 | 18377 | case DW_TAG_unspecified_type: |
f792889a | 18378 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 18379 | break; |
0114d602 DJ |
18380 | case DW_TAG_namespace: |
18381 | this_type = read_namespace_type (die, cu); | |
18382 | break; | |
f55ee35c JK |
18383 | case DW_TAG_module: |
18384 | this_type = read_module_type (die, cu); | |
18385 | break; | |
c906108c | 18386 | default: |
3e43a32a MS |
18387 | complaint (&symfile_complaints, |
18388 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 18389 | dwarf_tag_name (die->tag)); |
c906108c SS |
18390 | break; |
18391 | } | |
63d06c5c | 18392 | |
f792889a | 18393 | return this_type; |
63d06c5c DC |
18394 | } |
18395 | ||
abc72ce4 DE |
18396 | /* See if we can figure out if the class lives in a namespace. We do |
18397 | this by looking for a member function; its demangled name will | |
18398 | contain namespace info, if there is any. | |
18399 | Return the computed name or NULL. | |
18400 | Space for the result is allocated on the objfile's obstack. | |
18401 | This is the full-die version of guess_partial_die_structure_name. | |
18402 | In this case we know DIE has no useful parent. */ | |
18403 | ||
18404 | static char * | |
18405 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
18406 | { | |
18407 | struct die_info *spec_die; | |
18408 | struct dwarf2_cu *spec_cu; | |
18409 | struct die_info *child; | |
18410 | ||
18411 | spec_cu = cu; | |
18412 | spec_die = die_specification (die, &spec_cu); | |
18413 | if (spec_die != NULL) | |
18414 | { | |
18415 | die = spec_die; | |
18416 | cu = spec_cu; | |
18417 | } | |
18418 | ||
18419 | for (child = die->child; | |
18420 | child != NULL; | |
18421 | child = child->sibling) | |
18422 | { | |
18423 | if (child->tag == DW_TAG_subprogram) | |
18424 | { | |
18425 | struct attribute *attr; | |
18426 | ||
18427 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
18428 | if (attr == NULL) | |
18429 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
18430 | if (attr != NULL) | |
18431 | { | |
18432 | char *actual_name | |
18433 | = language_class_name_from_physname (cu->language_defn, | |
18434 | DW_STRING (attr)); | |
18435 | char *name = NULL; | |
18436 | ||
18437 | if (actual_name != NULL) | |
18438 | { | |
15d034d0 | 18439 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
18440 | |
18441 | if (die_name != NULL | |
18442 | && strcmp (die_name, actual_name) != 0) | |
18443 | { | |
18444 | /* Strip off the class name from the full name. | |
18445 | We want the prefix. */ | |
18446 | int die_name_len = strlen (die_name); | |
18447 | int actual_name_len = strlen (actual_name); | |
18448 | ||
18449 | /* Test for '::' as a sanity check. */ | |
18450 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
18451 | && actual_name[actual_name_len |
18452 | - die_name_len - 1] == ':') | |
abc72ce4 | 18453 | name = |
10f0c4bb TT |
18454 | obstack_copy0 (&cu->objfile->objfile_obstack, |
18455 | actual_name, | |
18456 | actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
18457 | } |
18458 | } | |
18459 | xfree (actual_name); | |
18460 | return name; | |
18461 | } | |
18462 | } | |
18463 | } | |
18464 | ||
18465 | return NULL; | |
18466 | } | |
18467 | ||
96408a79 SA |
18468 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
18469 | prefix part in such case. See | |
18470 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
18471 | ||
18472 | static char * | |
18473 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
18474 | { | |
18475 | struct attribute *attr; | |
18476 | char *base; | |
18477 | ||
18478 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
18479 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
18480 | return NULL; | |
18481 | ||
18482 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
18483 | if (attr != NULL && DW_STRING (attr) != NULL) | |
18484 | return NULL; | |
18485 | ||
18486 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
18487 | if (attr == NULL) | |
18488 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
18489 | if (attr == NULL || DW_STRING (attr) == NULL) | |
18490 | return NULL; | |
18491 | ||
18492 | /* dwarf2_name had to be already called. */ | |
18493 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
18494 | ||
18495 | /* Strip the base name, keep any leading namespaces/classes. */ | |
18496 | base = strrchr (DW_STRING (attr), ':'); | |
18497 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
18498 | return ""; | |
18499 | ||
10f0c4bb TT |
18500 | return obstack_copy0 (&cu->objfile->objfile_obstack, |
18501 | DW_STRING (attr), &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
18502 | } |
18503 | ||
fdde2d81 | 18504 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 18505 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 18506 | |
0114d602 DJ |
18507 | For example, if we're within the method foo() in the following |
18508 | code: | |
18509 | ||
18510 | namespace N { | |
18511 | class C { | |
18512 | void foo () { | |
18513 | } | |
18514 | }; | |
18515 | } | |
18516 | ||
18517 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 18518 | |
0d5cff50 | 18519 | static const char * |
e142c38c | 18520 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 18521 | { |
0114d602 DJ |
18522 | struct die_info *parent, *spec_die; |
18523 | struct dwarf2_cu *spec_cu; | |
18524 | struct type *parent_type; | |
96408a79 | 18525 | char *retval; |
63d06c5c | 18526 | |
f55ee35c JK |
18527 | if (cu->language != language_cplus && cu->language != language_java |
18528 | && cu->language != language_fortran) | |
0114d602 DJ |
18529 | return ""; |
18530 | ||
96408a79 SA |
18531 | retval = anonymous_struct_prefix (die, cu); |
18532 | if (retval) | |
18533 | return retval; | |
18534 | ||
0114d602 DJ |
18535 | /* We have to be careful in the presence of DW_AT_specification. |
18536 | For example, with GCC 3.4, given the code | |
18537 | ||
18538 | namespace N { | |
18539 | void foo() { | |
18540 | // Definition of N::foo. | |
18541 | } | |
18542 | } | |
18543 | ||
18544 | then we'll have a tree of DIEs like this: | |
18545 | ||
18546 | 1: DW_TAG_compile_unit | |
18547 | 2: DW_TAG_namespace // N | |
18548 | 3: DW_TAG_subprogram // declaration of N::foo | |
18549 | 4: DW_TAG_subprogram // definition of N::foo | |
18550 | DW_AT_specification // refers to die #3 | |
18551 | ||
18552 | Thus, when processing die #4, we have to pretend that we're in | |
18553 | the context of its DW_AT_specification, namely the contex of die | |
18554 | #3. */ | |
18555 | spec_cu = cu; | |
18556 | spec_die = die_specification (die, &spec_cu); | |
18557 | if (spec_die == NULL) | |
18558 | parent = die->parent; | |
18559 | else | |
63d06c5c | 18560 | { |
0114d602 DJ |
18561 | parent = spec_die->parent; |
18562 | cu = spec_cu; | |
63d06c5c | 18563 | } |
0114d602 DJ |
18564 | |
18565 | if (parent == NULL) | |
18566 | return ""; | |
98bfdba5 PA |
18567 | else if (parent->building_fullname) |
18568 | { | |
18569 | const char *name; | |
18570 | const char *parent_name; | |
18571 | ||
18572 | /* It has been seen on RealView 2.2 built binaries, | |
18573 | DW_TAG_template_type_param types actually _defined_ as | |
18574 | children of the parent class: | |
18575 | ||
18576 | enum E {}; | |
18577 | template class <class Enum> Class{}; | |
18578 | Class<enum E> class_e; | |
18579 | ||
18580 | 1: DW_TAG_class_type (Class) | |
18581 | 2: DW_TAG_enumeration_type (E) | |
18582 | 3: DW_TAG_enumerator (enum1:0) | |
18583 | 3: DW_TAG_enumerator (enum2:1) | |
18584 | ... | |
18585 | 2: DW_TAG_template_type_param | |
18586 | DW_AT_type DW_FORM_ref_udata (E) | |
18587 | ||
18588 | Besides being broken debug info, it can put GDB into an | |
18589 | infinite loop. Consider: | |
18590 | ||
18591 | When we're building the full name for Class<E>, we'll start | |
18592 | at Class, and go look over its template type parameters, | |
18593 | finding E. We'll then try to build the full name of E, and | |
18594 | reach here. We're now trying to build the full name of E, | |
18595 | and look over the parent DIE for containing scope. In the | |
18596 | broken case, if we followed the parent DIE of E, we'd again | |
18597 | find Class, and once again go look at its template type | |
18598 | arguments, etc., etc. Simply don't consider such parent die | |
18599 | as source-level parent of this die (it can't be, the language | |
18600 | doesn't allow it), and break the loop here. */ | |
18601 | name = dwarf2_name (die, cu); | |
18602 | parent_name = dwarf2_name (parent, cu); | |
18603 | complaint (&symfile_complaints, | |
18604 | _("template param type '%s' defined within parent '%s'"), | |
18605 | name ? name : "<unknown>", | |
18606 | parent_name ? parent_name : "<unknown>"); | |
18607 | return ""; | |
18608 | } | |
63d06c5c | 18609 | else |
0114d602 DJ |
18610 | switch (parent->tag) |
18611 | { | |
63d06c5c | 18612 | case DW_TAG_namespace: |
0114d602 | 18613 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
18614 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
18615 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
18616 | Work around this problem here. */ | |
18617 | if (cu->language == language_cplus | |
18618 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
18619 | return ""; | |
0114d602 DJ |
18620 | /* We give a name to even anonymous namespaces. */ |
18621 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 18622 | case DW_TAG_class_type: |
680b30c7 | 18623 | case DW_TAG_interface_type: |
63d06c5c | 18624 | case DW_TAG_structure_type: |
0114d602 | 18625 | case DW_TAG_union_type: |
f55ee35c | 18626 | case DW_TAG_module: |
0114d602 DJ |
18627 | parent_type = read_type_die (parent, cu); |
18628 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
18629 | return TYPE_TAG_NAME (parent_type); | |
18630 | else | |
18631 | /* An anonymous structure is only allowed non-static data | |
18632 | members; no typedefs, no member functions, et cetera. | |
18633 | So it does not need a prefix. */ | |
18634 | return ""; | |
abc72ce4 | 18635 | case DW_TAG_compile_unit: |
95554aad | 18636 | case DW_TAG_partial_unit: |
abc72ce4 DE |
18637 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
18638 | if (cu->language == language_cplus | |
8b70b953 | 18639 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
18640 | && die->child != NULL |
18641 | && (die->tag == DW_TAG_class_type | |
18642 | || die->tag == DW_TAG_structure_type | |
18643 | || die->tag == DW_TAG_union_type)) | |
18644 | { | |
18645 | char *name = guess_full_die_structure_name (die, cu); | |
18646 | if (name != NULL) | |
18647 | return name; | |
18648 | } | |
18649 | return ""; | |
63d06c5c | 18650 | default: |
8176b9b8 | 18651 | return determine_prefix (parent, cu); |
63d06c5c | 18652 | } |
63d06c5c DC |
18653 | } |
18654 | ||
3e43a32a MS |
18655 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
18656 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
18657 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
18658 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
18659 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 18660 | |
f55ee35c | 18661 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
18662 | |
18663 | static char * | |
f55ee35c JK |
18664 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
18665 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 18666 | { |
f55ee35c | 18667 | const char *lead = ""; |
5c315b68 | 18668 | const char *sep; |
63d06c5c | 18669 | |
3e43a32a MS |
18670 | if (suffix == NULL || suffix[0] == '\0' |
18671 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
18672 | sep = ""; |
18673 | else if (cu->language == language_java) | |
18674 | sep = "."; | |
f55ee35c JK |
18675 | else if (cu->language == language_fortran && physname) |
18676 | { | |
18677 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
18678 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
18679 | ||
18680 | lead = "__"; | |
18681 | sep = "_MOD_"; | |
18682 | } | |
987504bb JJ |
18683 | else |
18684 | sep = "::"; | |
63d06c5c | 18685 | |
6dd47d34 DE |
18686 | if (prefix == NULL) |
18687 | prefix = ""; | |
18688 | if (suffix == NULL) | |
18689 | suffix = ""; | |
18690 | ||
987504bb JJ |
18691 | if (obs == NULL) |
18692 | { | |
3e43a32a MS |
18693 | char *retval |
18694 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 18695 | |
f55ee35c JK |
18696 | strcpy (retval, lead); |
18697 | strcat (retval, prefix); | |
6dd47d34 DE |
18698 | strcat (retval, sep); |
18699 | strcat (retval, suffix); | |
63d06c5c DC |
18700 | return retval; |
18701 | } | |
987504bb JJ |
18702 | else |
18703 | { | |
18704 | /* We have an obstack. */ | |
f55ee35c | 18705 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 18706 | } |
63d06c5c DC |
18707 | } |
18708 | ||
c906108c SS |
18709 | /* Return sibling of die, NULL if no sibling. */ |
18710 | ||
f9aca02d | 18711 | static struct die_info * |
fba45db2 | 18712 | sibling_die (struct die_info *die) |
c906108c | 18713 | { |
639d11d3 | 18714 | return die->sibling; |
c906108c SS |
18715 | } |
18716 | ||
71c25dea TT |
18717 | /* Get name of a die, return NULL if not found. */ |
18718 | ||
15d034d0 TT |
18719 | static const char * |
18720 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
18721 | struct obstack *obstack) |
18722 | { | |
18723 | if (name && cu->language == language_cplus) | |
18724 | { | |
18725 | char *canon_name = cp_canonicalize_string (name); | |
18726 | ||
18727 | if (canon_name != NULL) | |
18728 | { | |
18729 | if (strcmp (canon_name, name) != 0) | |
10f0c4bb | 18730 | name = obstack_copy0 (obstack, canon_name, strlen (canon_name)); |
71c25dea TT |
18731 | xfree (canon_name); |
18732 | } | |
18733 | } | |
18734 | ||
18735 | return name; | |
c906108c SS |
18736 | } |
18737 | ||
9219021c DC |
18738 | /* Get name of a die, return NULL if not found. */ |
18739 | ||
15d034d0 | 18740 | static const char * |
e142c38c | 18741 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
18742 | { |
18743 | struct attribute *attr; | |
18744 | ||
e142c38c | 18745 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
18746 | if ((!attr || !DW_STRING (attr)) |
18747 | && die->tag != DW_TAG_class_type | |
18748 | && die->tag != DW_TAG_interface_type | |
18749 | && die->tag != DW_TAG_structure_type | |
18750 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
18751 | return NULL; |
18752 | ||
18753 | switch (die->tag) | |
18754 | { | |
18755 | case DW_TAG_compile_unit: | |
95554aad | 18756 | case DW_TAG_partial_unit: |
71c25dea TT |
18757 | /* Compilation units have a DW_AT_name that is a filename, not |
18758 | a source language identifier. */ | |
18759 | case DW_TAG_enumeration_type: | |
18760 | case DW_TAG_enumerator: | |
18761 | /* These tags always have simple identifiers already; no need | |
18762 | to canonicalize them. */ | |
18763 | return DW_STRING (attr); | |
907af001 | 18764 | |
418835cc KS |
18765 | case DW_TAG_subprogram: |
18766 | /* Java constructors will all be named "<init>", so return | |
18767 | the class name when we see this special case. */ | |
18768 | if (cu->language == language_java | |
18769 | && DW_STRING (attr) != NULL | |
18770 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
18771 | { | |
18772 | struct dwarf2_cu *spec_cu = cu; | |
18773 | struct die_info *spec_die; | |
18774 | ||
18775 | /* GCJ will output '<init>' for Java constructor names. | |
18776 | For this special case, return the name of the parent class. */ | |
18777 | ||
18778 | /* GCJ may output suprogram DIEs with AT_specification set. | |
18779 | If so, use the name of the specified DIE. */ | |
18780 | spec_die = die_specification (die, &spec_cu); | |
18781 | if (spec_die != NULL) | |
18782 | return dwarf2_name (spec_die, spec_cu); | |
18783 | ||
18784 | do | |
18785 | { | |
18786 | die = die->parent; | |
18787 | if (die->tag == DW_TAG_class_type) | |
18788 | return dwarf2_name (die, cu); | |
18789 | } | |
95554aad TT |
18790 | while (die->tag != DW_TAG_compile_unit |
18791 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 18792 | } |
907af001 UW |
18793 | break; |
18794 | ||
18795 | case DW_TAG_class_type: | |
18796 | case DW_TAG_interface_type: | |
18797 | case DW_TAG_structure_type: | |
18798 | case DW_TAG_union_type: | |
18799 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
18800 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
18801 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
18802 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
18803 | if (attr && DW_STRING (attr) |
18804 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
18805 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 18806 | return NULL; |
53832f31 TT |
18807 | |
18808 | /* GCC might emit a nameless typedef that has a linkage name. See | |
18809 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
18810 | if (!attr || DW_STRING (attr) == NULL) | |
18811 | { | |
df5c6c50 | 18812 | char *demangled = NULL; |
53832f31 TT |
18813 | |
18814 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
18815 | if (attr == NULL) | |
18816 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
18817 | ||
18818 | if (attr == NULL || DW_STRING (attr) == NULL) | |
18819 | return NULL; | |
18820 | ||
df5c6c50 JK |
18821 | /* Avoid demangling DW_STRING (attr) the second time on a second |
18822 | call for the same DIE. */ | |
18823 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 18824 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
18825 | |
18826 | if (demangled) | |
18827 | { | |
96408a79 SA |
18828 | char *base; |
18829 | ||
53832f31 | 18830 | /* FIXME: we already did this for the partial symbol... */ |
10f0c4bb TT |
18831 | DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack, |
18832 | demangled, strlen (demangled)); | |
53832f31 TT |
18833 | DW_STRING_IS_CANONICAL (attr) = 1; |
18834 | xfree (demangled); | |
96408a79 SA |
18835 | |
18836 | /* Strip any leading namespaces/classes, keep only the base name. | |
18837 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
18838 | base = strrchr (DW_STRING (attr), ':'); | |
18839 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
18840 | return &base[1]; | |
18841 | else | |
18842 | return DW_STRING (attr); | |
53832f31 TT |
18843 | } |
18844 | } | |
907af001 UW |
18845 | break; |
18846 | ||
71c25dea | 18847 | default: |
907af001 UW |
18848 | break; |
18849 | } | |
18850 | ||
18851 | if (!DW_STRING_IS_CANONICAL (attr)) | |
18852 | { | |
18853 | DW_STRING (attr) | |
18854 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
18855 | &cu->objfile->objfile_obstack); | |
18856 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 18857 | } |
907af001 | 18858 | return DW_STRING (attr); |
9219021c DC |
18859 | } |
18860 | ||
18861 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
18862 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
18863 | containing the return value on output. */ | |
9219021c DC |
18864 | |
18865 | static struct die_info * | |
f2f0e013 | 18866 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
18867 | { |
18868 | struct attribute *attr; | |
9219021c | 18869 | |
f2f0e013 | 18870 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
18871 | if (attr == NULL) |
18872 | return NULL; | |
18873 | ||
f2f0e013 | 18874 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
18875 | } |
18876 | ||
c906108c SS |
18877 | /* Convert a DIE tag into its string name. */ |
18878 | ||
f39c6ffd | 18879 | static const char * |
aa1ee363 | 18880 | dwarf_tag_name (unsigned tag) |
c906108c | 18881 | { |
f39c6ffd TT |
18882 | const char *name = get_DW_TAG_name (tag); |
18883 | ||
18884 | if (name == NULL) | |
18885 | return "DW_TAG_<unknown>"; | |
18886 | ||
18887 | return name; | |
c906108c SS |
18888 | } |
18889 | ||
18890 | /* Convert a DWARF attribute code into its string name. */ | |
18891 | ||
f39c6ffd | 18892 | static const char * |
aa1ee363 | 18893 | dwarf_attr_name (unsigned attr) |
c906108c | 18894 | { |
f39c6ffd TT |
18895 | const char *name; |
18896 | ||
c764a876 | 18897 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
18898 | if (attr == DW_AT_MIPS_fde) |
18899 | return "DW_AT_MIPS_fde"; | |
18900 | #else | |
18901 | if (attr == DW_AT_HP_block_index) | |
18902 | return "DW_AT_HP_block_index"; | |
c764a876 | 18903 | #endif |
f39c6ffd TT |
18904 | |
18905 | name = get_DW_AT_name (attr); | |
18906 | ||
18907 | if (name == NULL) | |
18908 | return "DW_AT_<unknown>"; | |
18909 | ||
18910 | return name; | |
c906108c SS |
18911 | } |
18912 | ||
18913 | /* Convert a DWARF value form code into its string name. */ | |
18914 | ||
f39c6ffd | 18915 | static const char * |
aa1ee363 | 18916 | dwarf_form_name (unsigned form) |
c906108c | 18917 | { |
f39c6ffd TT |
18918 | const char *name = get_DW_FORM_name (form); |
18919 | ||
18920 | if (name == NULL) | |
18921 | return "DW_FORM_<unknown>"; | |
18922 | ||
18923 | return name; | |
c906108c SS |
18924 | } |
18925 | ||
18926 | static char * | |
fba45db2 | 18927 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
18928 | { |
18929 | if (mybool) | |
18930 | return "TRUE"; | |
18931 | else | |
18932 | return "FALSE"; | |
18933 | } | |
18934 | ||
18935 | /* Convert a DWARF type code into its string name. */ | |
18936 | ||
f39c6ffd | 18937 | static const char * |
aa1ee363 | 18938 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 18939 | { |
f39c6ffd | 18940 | const char *name = get_DW_ATE_name (enc); |
c906108c | 18941 | |
f39c6ffd TT |
18942 | if (name == NULL) |
18943 | return "DW_ATE_<unknown>"; | |
c906108c | 18944 | |
f39c6ffd | 18945 | return name; |
c906108c | 18946 | } |
c906108c | 18947 | |
f9aca02d | 18948 | static void |
d97bc12b | 18949 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
18950 | { |
18951 | unsigned int i; | |
18952 | ||
d97bc12b DE |
18953 | print_spaces (indent, f); |
18954 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 18955 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
18956 | |
18957 | if (die->parent != NULL) | |
18958 | { | |
18959 | print_spaces (indent, f); | |
18960 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 18961 | die->parent->offset.sect_off); |
d97bc12b DE |
18962 | } |
18963 | ||
18964 | print_spaces (indent, f); | |
18965 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 18966 | dwarf_bool_name (die->child != NULL)); |
c906108c | 18967 | |
d97bc12b DE |
18968 | print_spaces (indent, f); |
18969 | fprintf_unfiltered (f, " attributes:\n"); | |
18970 | ||
c906108c SS |
18971 | for (i = 0; i < die->num_attrs; ++i) |
18972 | { | |
d97bc12b DE |
18973 | print_spaces (indent, f); |
18974 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
18975 | dwarf_attr_name (die->attrs[i].name), |
18976 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 18977 | |
c906108c SS |
18978 | switch (die->attrs[i].form) |
18979 | { | |
c906108c | 18980 | case DW_FORM_addr: |
3019eac3 | 18981 | case DW_FORM_GNU_addr_index: |
d97bc12b | 18982 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 18983 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
18984 | break; |
18985 | case DW_FORM_block2: | |
18986 | case DW_FORM_block4: | |
18987 | case DW_FORM_block: | |
18988 | case DW_FORM_block1: | |
56eb65bd SP |
18989 | fprintf_unfiltered (f, "block: size %s", |
18990 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 18991 | break; |
2dc7f7b3 | 18992 | case DW_FORM_exprloc: |
56eb65bd SP |
18993 | fprintf_unfiltered (f, "expression: size %s", |
18994 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 18995 | break; |
4568ecf9 DE |
18996 | case DW_FORM_ref_addr: |
18997 | fprintf_unfiltered (f, "ref address: "); | |
18998 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
18999 | break; | |
36586728 TT |
19000 | case DW_FORM_GNU_ref_alt: |
19001 | fprintf_unfiltered (f, "alt ref address: "); | |
19002 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19003 | break; | |
10b3939b DJ |
19004 | case DW_FORM_ref1: |
19005 | case DW_FORM_ref2: | |
19006 | case DW_FORM_ref4: | |
4568ecf9 DE |
19007 | case DW_FORM_ref8: |
19008 | case DW_FORM_ref_udata: | |
d97bc12b | 19009 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 19010 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 19011 | break; |
c906108c SS |
19012 | case DW_FORM_data1: |
19013 | case DW_FORM_data2: | |
19014 | case DW_FORM_data4: | |
ce5d95e1 | 19015 | case DW_FORM_data8: |
c906108c SS |
19016 | case DW_FORM_udata: |
19017 | case DW_FORM_sdata: | |
43bbcdc2 PH |
19018 | fprintf_unfiltered (f, "constant: %s", |
19019 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 19020 | break; |
2dc7f7b3 TT |
19021 | case DW_FORM_sec_offset: |
19022 | fprintf_unfiltered (f, "section offset: %s", | |
19023 | pulongest (DW_UNSND (&die->attrs[i]))); | |
19024 | break; | |
55f1336d | 19025 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
19026 | fprintf_unfiltered (f, "signature: %s", |
19027 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 19028 | break; |
c906108c | 19029 | case DW_FORM_string: |
4bdf3d34 | 19030 | case DW_FORM_strp: |
3019eac3 | 19031 | case DW_FORM_GNU_str_index: |
36586728 | 19032 | case DW_FORM_GNU_strp_alt: |
8285870a | 19033 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 19034 | DW_STRING (&die->attrs[i]) |
8285870a JK |
19035 | ? DW_STRING (&die->attrs[i]) : "", |
19036 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
19037 | break; |
19038 | case DW_FORM_flag: | |
19039 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 19040 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 19041 | else |
d97bc12b | 19042 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 19043 | break; |
2dc7f7b3 TT |
19044 | case DW_FORM_flag_present: |
19045 | fprintf_unfiltered (f, "flag: TRUE"); | |
19046 | break; | |
a8329558 | 19047 | case DW_FORM_indirect: |
0963b4bd MS |
19048 | /* The reader will have reduced the indirect form to |
19049 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
19050 | fprintf_unfiltered (f, |
19051 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 19052 | break; |
c906108c | 19053 | default: |
d97bc12b | 19054 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 19055 | die->attrs[i].form); |
d97bc12b | 19056 | break; |
c906108c | 19057 | } |
d97bc12b | 19058 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
19059 | } |
19060 | } | |
19061 | ||
f9aca02d | 19062 | static void |
d97bc12b | 19063 | dump_die_for_error (struct die_info *die) |
c906108c | 19064 | { |
d97bc12b DE |
19065 | dump_die_shallow (gdb_stderr, 0, die); |
19066 | } | |
19067 | ||
19068 | static void | |
19069 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
19070 | { | |
19071 | int indent = level * 4; | |
19072 | ||
19073 | gdb_assert (die != NULL); | |
19074 | ||
19075 | if (level >= max_level) | |
19076 | return; | |
19077 | ||
19078 | dump_die_shallow (f, indent, die); | |
19079 | ||
19080 | if (die->child != NULL) | |
c906108c | 19081 | { |
d97bc12b DE |
19082 | print_spaces (indent, f); |
19083 | fprintf_unfiltered (f, " Children:"); | |
19084 | if (level + 1 < max_level) | |
19085 | { | |
19086 | fprintf_unfiltered (f, "\n"); | |
19087 | dump_die_1 (f, level + 1, max_level, die->child); | |
19088 | } | |
19089 | else | |
19090 | { | |
3e43a32a MS |
19091 | fprintf_unfiltered (f, |
19092 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
19093 | } |
19094 | } | |
19095 | ||
19096 | if (die->sibling != NULL && level > 0) | |
19097 | { | |
19098 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
19099 | } |
19100 | } | |
19101 | ||
d97bc12b DE |
19102 | /* This is called from the pdie macro in gdbinit.in. |
19103 | It's not static so gcc will keep a copy callable from gdb. */ | |
19104 | ||
19105 | void | |
19106 | dump_die (struct die_info *die, int max_level) | |
19107 | { | |
19108 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
19109 | } | |
19110 | ||
f9aca02d | 19111 | static void |
51545339 | 19112 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19113 | { |
51545339 | 19114 | void **slot; |
c906108c | 19115 | |
b64f50a1 JK |
19116 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
19117 | INSERT); | |
51545339 DJ |
19118 | |
19119 | *slot = die; | |
c906108c SS |
19120 | } |
19121 | ||
b64f50a1 JK |
19122 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
19123 | required kind. */ | |
19124 | ||
19125 | static sect_offset | |
ff39bb5e | 19126 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 19127 | { |
4568ecf9 | 19128 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 19129 | |
7771576e | 19130 | if (attr_form_is_ref (attr)) |
b64f50a1 | 19131 | return retval; |
93311388 | 19132 | |
b64f50a1 | 19133 | retval.sect_off = 0; |
93311388 DE |
19134 | complaint (&symfile_complaints, |
19135 | _("unsupported die ref attribute form: '%s'"), | |
19136 | dwarf_form_name (attr->form)); | |
b64f50a1 | 19137 | return retval; |
c906108c SS |
19138 | } |
19139 | ||
43bbcdc2 PH |
19140 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
19141 | * the value held by the attribute is not constant. */ | |
a02abb62 | 19142 | |
43bbcdc2 | 19143 | static LONGEST |
ff39bb5e | 19144 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
19145 | { |
19146 | if (attr->form == DW_FORM_sdata) | |
19147 | return DW_SND (attr); | |
19148 | else if (attr->form == DW_FORM_udata | |
19149 | || attr->form == DW_FORM_data1 | |
19150 | || attr->form == DW_FORM_data2 | |
19151 | || attr->form == DW_FORM_data4 | |
19152 | || attr->form == DW_FORM_data8) | |
19153 | return DW_UNSND (attr); | |
19154 | else | |
19155 | { | |
3e43a32a MS |
19156 | complaint (&symfile_complaints, |
19157 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
19158 | dwarf_form_name (attr->form)); |
19159 | return default_value; | |
19160 | } | |
19161 | } | |
19162 | ||
348e048f DE |
19163 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
19164 | On entry *REF_CU is the CU of SRC_DIE. | |
19165 | On exit *REF_CU is the CU of the result. */ | |
19166 | ||
19167 | static struct die_info * | |
ff39bb5e | 19168 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
19169 | struct dwarf2_cu **ref_cu) |
19170 | { | |
19171 | struct die_info *die; | |
19172 | ||
7771576e | 19173 | if (attr_form_is_ref (attr)) |
348e048f | 19174 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 19175 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
19176 | die = follow_die_sig (src_die, attr, ref_cu); |
19177 | else | |
19178 | { | |
19179 | dump_die_for_error (src_die); | |
19180 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 19181 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
19182 | } |
19183 | ||
19184 | return die; | |
03dd20cc DJ |
19185 | } |
19186 | ||
5c631832 | 19187 | /* Follow reference OFFSET. |
673bfd45 DE |
19188 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
19189 | On exit *REF_CU is the CU of the result. | |
19190 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 19191 | |
f9aca02d | 19192 | static struct die_info * |
36586728 TT |
19193 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
19194 | struct dwarf2_cu **ref_cu) | |
c906108c | 19195 | { |
10b3939b | 19196 | struct die_info temp_die; |
f2f0e013 | 19197 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 19198 | |
348e048f DE |
19199 | gdb_assert (cu->per_cu != NULL); |
19200 | ||
98bfdba5 PA |
19201 | target_cu = cu; |
19202 | ||
3019eac3 | 19203 | if (cu->per_cu->is_debug_types) |
348e048f DE |
19204 | { |
19205 | /* .debug_types CUs cannot reference anything outside their CU. | |
19206 | If they need to, they have to reference a signatured type via | |
55f1336d | 19207 | DW_FORM_ref_sig8. */ |
348e048f | 19208 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 19209 | return NULL; |
348e048f | 19210 | } |
36586728 TT |
19211 | else if (offset_in_dwz != cu->per_cu->is_dwz |
19212 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
19213 | { |
19214 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 19215 | |
36586728 TT |
19216 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
19217 | cu->objfile); | |
03dd20cc DJ |
19218 | |
19219 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
19220 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
19221 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 19222 | |
10b3939b DJ |
19223 | target_cu = per_cu->cu; |
19224 | } | |
98bfdba5 PA |
19225 | else if (cu->dies == NULL) |
19226 | { | |
19227 | /* We're loading full DIEs during partial symbol reading. */ | |
19228 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 19229 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 19230 | } |
c906108c | 19231 | |
f2f0e013 | 19232 | *ref_cu = target_cu; |
51545339 | 19233 | temp_die.offset = offset; |
b64f50a1 | 19234 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 19235 | } |
10b3939b | 19236 | |
5c631832 JK |
19237 | /* Follow reference attribute ATTR of SRC_DIE. |
19238 | On entry *REF_CU is the CU of SRC_DIE. | |
19239 | On exit *REF_CU is the CU of the result. */ | |
19240 | ||
19241 | static struct die_info * | |
ff39bb5e | 19242 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
19243 | struct dwarf2_cu **ref_cu) |
19244 | { | |
b64f50a1 | 19245 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
19246 | struct dwarf2_cu *cu = *ref_cu; |
19247 | struct die_info *die; | |
19248 | ||
36586728 TT |
19249 | die = follow_die_offset (offset, |
19250 | (attr->form == DW_FORM_GNU_ref_alt | |
19251 | || cu->per_cu->is_dwz), | |
19252 | ref_cu); | |
5c631832 JK |
19253 | if (!die) |
19254 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
19255 | "at 0x%x [in module %s]"), | |
4262abfb JK |
19256 | offset.sect_off, src_die->offset.sect_off, |
19257 | objfile_name (cu->objfile)); | |
348e048f | 19258 | |
5c631832 JK |
19259 | return die; |
19260 | } | |
19261 | ||
d83e736b JK |
19262 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
19263 | Returned value is intended for DW_OP_call*. Returned | |
19264 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
19265 | |
19266 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
19267 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
19268 | struct dwarf2_per_cu_data *per_cu, | |
19269 | CORE_ADDR (*get_frame_pc) (void *baton), | |
19270 | void *baton) | |
5c631832 | 19271 | { |
918dd910 | 19272 | struct dwarf2_cu *cu; |
5c631832 JK |
19273 | struct die_info *die; |
19274 | struct attribute *attr; | |
19275 | struct dwarf2_locexpr_baton retval; | |
19276 | ||
8cf6f0b1 TT |
19277 | dw2_setup (per_cu->objfile); |
19278 | ||
918dd910 JK |
19279 | if (per_cu->cu == NULL) |
19280 | load_cu (per_cu); | |
19281 | cu = per_cu->cu; | |
19282 | ||
36586728 | 19283 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
19284 | if (!die) |
19285 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 19286 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
19287 | |
19288 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
19289 | if (!attr) | |
19290 | { | |
e103e986 JK |
19291 | /* DWARF: "If there is no such attribute, then there is no effect.". |
19292 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 19293 | |
e103e986 | 19294 | retval.data = NULL; |
5c631832 JK |
19295 | retval.size = 0; |
19296 | } | |
8cf6f0b1 TT |
19297 | else if (attr_form_is_section_offset (attr)) |
19298 | { | |
19299 | struct dwarf2_loclist_baton loclist_baton; | |
19300 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
19301 | size_t size; | |
19302 | ||
19303 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
19304 | ||
19305 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
19306 | &size, pc); | |
19307 | retval.size = size; | |
19308 | } | |
5c631832 JK |
19309 | else |
19310 | { | |
19311 | if (!attr_form_is_block (attr)) | |
19312 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
19313 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 19314 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
19315 | |
19316 | retval.data = DW_BLOCK (attr)->data; | |
19317 | retval.size = DW_BLOCK (attr)->size; | |
19318 | } | |
19319 | retval.per_cu = cu->per_cu; | |
918dd910 | 19320 | |
918dd910 JK |
19321 | age_cached_comp_units (); |
19322 | ||
5c631832 | 19323 | return retval; |
348e048f DE |
19324 | } |
19325 | ||
8b9737bf TT |
19326 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
19327 | offset. */ | |
19328 | ||
19329 | struct dwarf2_locexpr_baton | |
19330 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
19331 | struct dwarf2_per_cu_data *per_cu, | |
19332 | CORE_ADDR (*get_frame_pc) (void *baton), | |
19333 | void *baton) | |
19334 | { | |
19335 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
19336 | ||
19337 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
19338 | } | |
19339 | ||
b6807d98 TT |
19340 | /* Write a constant of a given type as target-ordered bytes into |
19341 | OBSTACK. */ | |
19342 | ||
19343 | static const gdb_byte * | |
19344 | write_constant_as_bytes (struct obstack *obstack, | |
19345 | enum bfd_endian byte_order, | |
19346 | struct type *type, | |
19347 | ULONGEST value, | |
19348 | LONGEST *len) | |
19349 | { | |
19350 | gdb_byte *result; | |
19351 | ||
19352 | *len = TYPE_LENGTH (type); | |
19353 | result = obstack_alloc (obstack, *len); | |
19354 | store_unsigned_integer (result, *len, byte_order, value); | |
19355 | ||
19356 | return result; | |
19357 | } | |
19358 | ||
19359 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
19360 | pointer to the constant bytes and set LEN to the length of the | |
19361 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
19362 | does not have a DW_AT_const_value, return NULL. */ | |
19363 | ||
19364 | const gdb_byte * | |
19365 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
19366 | struct dwarf2_per_cu_data *per_cu, | |
19367 | struct obstack *obstack, | |
19368 | LONGEST *len) | |
19369 | { | |
19370 | struct dwarf2_cu *cu; | |
19371 | struct die_info *die; | |
19372 | struct attribute *attr; | |
19373 | const gdb_byte *result = NULL; | |
19374 | struct type *type; | |
19375 | LONGEST value; | |
19376 | enum bfd_endian byte_order; | |
19377 | ||
19378 | dw2_setup (per_cu->objfile); | |
19379 | ||
19380 | if (per_cu->cu == NULL) | |
19381 | load_cu (per_cu); | |
19382 | cu = per_cu->cu; | |
19383 | ||
19384 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
19385 | if (!die) | |
19386 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 19387 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
19388 | |
19389 | ||
19390 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
19391 | if (attr == NULL) | |
19392 | return NULL; | |
19393 | ||
19394 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
19395 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
19396 | ||
19397 | switch (attr->form) | |
19398 | { | |
19399 | case DW_FORM_addr: | |
19400 | case DW_FORM_GNU_addr_index: | |
19401 | { | |
19402 | gdb_byte *tem; | |
19403 | ||
19404 | *len = cu->header.addr_size; | |
19405 | tem = obstack_alloc (obstack, *len); | |
19406 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); | |
19407 | result = tem; | |
19408 | } | |
19409 | break; | |
19410 | case DW_FORM_string: | |
19411 | case DW_FORM_strp: | |
19412 | case DW_FORM_GNU_str_index: | |
19413 | case DW_FORM_GNU_strp_alt: | |
19414 | /* DW_STRING is already allocated on the objfile obstack, point | |
19415 | directly to it. */ | |
19416 | result = (const gdb_byte *) DW_STRING (attr); | |
19417 | *len = strlen (DW_STRING (attr)); | |
19418 | break; | |
19419 | case DW_FORM_block1: | |
19420 | case DW_FORM_block2: | |
19421 | case DW_FORM_block4: | |
19422 | case DW_FORM_block: | |
19423 | case DW_FORM_exprloc: | |
19424 | result = DW_BLOCK (attr)->data; | |
19425 | *len = DW_BLOCK (attr)->size; | |
19426 | break; | |
19427 | ||
19428 | /* The DW_AT_const_value attributes are supposed to carry the | |
19429 | symbol's value "represented as it would be on the target | |
19430 | architecture." By the time we get here, it's already been | |
19431 | converted to host endianness, so we just need to sign- or | |
19432 | zero-extend it as appropriate. */ | |
19433 | case DW_FORM_data1: | |
19434 | type = die_type (die, cu); | |
19435 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
19436 | if (result == NULL) | |
19437 | result = write_constant_as_bytes (obstack, byte_order, | |
19438 | type, value, len); | |
19439 | break; | |
19440 | case DW_FORM_data2: | |
19441 | type = die_type (die, cu); | |
19442 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
19443 | if (result == NULL) | |
19444 | result = write_constant_as_bytes (obstack, byte_order, | |
19445 | type, value, len); | |
19446 | break; | |
19447 | case DW_FORM_data4: | |
19448 | type = die_type (die, cu); | |
19449 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
19450 | if (result == NULL) | |
19451 | result = write_constant_as_bytes (obstack, byte_order, | |
19452 | type, value, len); | |
19453 | break; | |
19454 | case DW_FORM_data8: | |
19455 | type = die_type (die, cu); | |
19456 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
19457 | if (result == NULL) | |
19458 | result = write_constant_as_bytes (obstack, byte_order, | |
19459 | type, value, len); | |
19460 | break; | |
19461 | ||
19462 | case DW_FORM_sdata: | |
19463 | type = die_type (die, cu); | |
19464 | result = write_constant_as_bytes (obstack, byte_order, | |
19465 | type, DW_SND (attr), len); | |
19466 | break; | |
19467 | ||
19468 | case DW_FORM_udata: | |
19469 | type = die_type (die, cu); | |
19470 | result = write_constant_as_bytes (obstack, byte_order, | |
19471 | type, DW_UNSND (attr), len); | |
19472 | break; | |
19473 | ||
19474 | default: | |
19475 | complaint (&symfile_complaints, | |
19476 | _("unsupported const value attribute form: '%s'"), | |
19477 | dwarf_form_name (attr->form)); | |
19478 | break; | |
19479 | } | |
19480 | ||
19481 | return result; | |
19482 | } | |
19483 | ||
8a9b8146 TT |
19484 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
19485 | PER_CU. */ | |
19486 | ||
19487 | struct type * | |
b64f50a1 | 19488 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
19489 | struct dwarf2_per_cu_data *per_cu) |
19490 | { | |
b64f50a1 JK |
19491 | sect_offset die_offset_sect; |
19492 | ||
8a9b8146 | 19493 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
19494 | |
19495 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
19496 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
19497 | } |
19498 | ||
ac9ec31b | 19499 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 19500 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
19501 | On exit *REF_CU is the CU of the result. |
19502 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
19503 | |
19504 | static struct die_info * | |
ac9ec31b DE |
19505 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
19506 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
19507 | { |
19508 | struct objfile *objfile = (*ref_cu)->objfile; | |
19509 | struct die_info temp_die; | |
348e048f DE |
19510 | struct dwarf2_cu *sig_cu; |
19511 | struct die_info *die; | |
19512 | ||
ac9ec31b DE |
19513 | /* While it might be nice to assert sig_type->type == NULL here, |
19514 | we can get here for DW_AT_imported_declaration where we need | |
19515 | the DIE not the type. */ | |
348e048f DE |
19516 | |
19517 | /* If necessary, add it to the queue and load its DIEs. */ | |
19518 | ||
95554aad | 19519 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 19520 | read_signatured_type (sig_type); |
348e048f | 19521 | |
348e048f | 19522 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 19523 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
19524 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
19525 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
19526 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
19527 | temp_die.offset.sect_off); | |
348e048f DE |
19528 | if (die) |
19529 | { | |
796a7ff8 DE |
19530 | /* For .gdb_index version 7 keep track of included TUs. |
19531 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
19532 | if (dwarf2_per_objfile->index_table != NULL | |
19533 | && dwarf2_per_objfile->index_table->version <= 7) | |
19534 | { | |
19535 | VEC_safe_push (dwarf2_per_cu_ptr, | |
19536 | (*ref_cu)->per_cu->imported_symtabs, | |
19537 | sig_cu->per_cu); | |
19538 | } | |
19539 | ||
348e048f DE |
19540 | *ref_cu = sig_cu; |
19541 | return die; | |
19542 | } | |
19543 | ||
ac9ec31b DE |
19544 | return NULL; |
19545 | } | |
19546 | ||
19547 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
19548 | On entry *REF_CU is the CU of SRC_DIE. | |
19549 | On exit *REF_CU is the CU of the result. | |
19550 | The result is the DIE of the type. | |
19551 | If the referenced type cannot be found an error is thrown. */ | |
19552 | ||
19553 | static struct die_info * | |
ff39bb5e | 19554 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
19555 | struct dwarf2_cu **ref_cu) |
19556 | { | |
19557 | ULONGEST signature = DW_SIGNATURE (attr); | |
19558 | struct signatured_type *sig_type; | |
19559 | struct die_info *die; | |
19560 | ||
19561 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
19562 | ||
a2ce51a0 | 19563 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
19564 | /* sig_type will be NULL if the signatured type is missing from |
19565 | the debug info. */ | |
19566 | if (sig_type == NULL) | |
19567 | { | |
19568 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
19569 | " from DIE at 0x%x [in module %s]"), | |
19570 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 19571 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
19572 | } |
19573 | ||
19574 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
19575 | if (die == NULL) | |
19576 | { | |
19577 | dump_die_for_error (src_die); | |
19578 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
19579 | " from DIE at 0x%x [in module %s]"), | |
19580 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 19581 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
19582 | } |
19583 | ||
19584 | return die; | |
19585 | } | |
19586 | ||
19587 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
19588 | reading in and processing the type unit if necessary. */ | |
19589 | ||
19590 | static struct type * | |
19591 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
19592 | struct dwarf2_cu *cu) | |
19593 | { | |
19594 | struct signatured_type *sig_type; | |
19595 | struct dwarf2_cu *type_cu; | |
19596 | struct die_info *type_die; | |
19597 | struct type *type; | |
19598 | ||
a2ce51a0 | 19599 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
19600 | /* sig_type will be NULL if the signatured type is missing from |
19601 | the debug info. */ | |
19602 | if (sig_type == NULL) | |
19603 | { | |
19604 | complaint (&symfile_complaints, | |
19605 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
19606 | " from DIE at 0x%x [in module %s]"), | |
19607 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19608 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19609 | return build_error_marker_type (cu, die); |
19610 | } | |
19611 | ||
19612 | /* If we already know the type we're done. */ | |
19613 | if (sig_type->type != NULL) | |
19614 | return sig_type->type; | |
19615 | ||
19616 | type_cu = cu; | |
19617 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
19618 | if (type_die != NULL) | |
19619 | { | |
19620 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
19621 | is created. This is important, for example, because for c++ classes | |
19622 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
19623 | type = read_type_die (type_die, type_cu); | |
19624 | if (type == NULL) | |
19625 | { | |
19626 | complaint (&symfile_complaints, | |
19627 | _("Dwarf Error: Cannot build signatured type %s" | |
19628 | " referenced from DIE at 0x%x [in module %s]"), | |
19629 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19630 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19631 | type = build_error_marker_type (cu, die); |
19632 | } | |
19633 | } | |
19634 | else | |
19635 | { | |
19636 | complaint (&symfile_complaints, | |
19637 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
19638 | " from DIE at 0x%x [in module %s]"), | |
19639 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19640 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19641 | type = build_error_marker_type (cu, die); |
19642 | } | |
19643 | sig_type->type = type; | |
19644 | ||
19645 | return type; | |
19646 | } | |
19647 | ||
19648 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
19649 | reading in and processing the type unit if necessary. */ | |
19650 | ||
19651 | static struct type * | |
ff39bb5e | 19652 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 19653 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
19654 | { |
19655 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 19656 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19657 | { |
19658 | struct dwarf2_cu *type_cu = cu; | |
19659 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
19660 | ||
19661 | return read_type_die (type_die, type_cu); | |
19662 | } | |
19663 | else if (attr->form == DW_FORM_ref_sig8) | |
19664 | { | |
19665 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
19666 | } | |
19667 | else | |
19668 | { | |
19669 | complaint (&symfile_complaints, | |
19670 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
19671 | " at 0x%x [in module %s]"), | |
19672 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 19673 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19674 | return build_error_marker_type (cu, die); |
19675 | } | |
348e048f DE |
19676 | } |
19677 | ||
e5fe5e75 | 19678 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
19679 | |
19680 | static void | |
e5fe5e75 | 19681 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 19682 | { |
52dc124a | 19683 | struct signatured_type *sig_type; |
348e048f | 19684 | |
f4dc4d17 DE |
19685 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
19686 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
19687 | ||
6721b2ec DE |
19688 | /* We have the per_cu, but we need the signatured_type. |
19689 | Fortunately this is an easy translation. */ | |
19690 | gdb_assert (per_cu->is_debug_types); | |
19691 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 19692 | |
6721b2ec | 19693 | gdb_assert (per_cu->cu == NULL); |
348e048f | 19694 | |
52dc124a | 19695 | read_signatured_type (sig_type); |
348e048f | 19696 | |
6721b2ec | 19697 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
19698 | } |
19699 | ||
dee91e82 DE |
19700 | /* die_reader_func for read_signatured_type. |
19701 | This is identical to load_full_comp_unit_reader, | |
19702 | but is kept separate for now. */ | |
348e048f DE |
19703 | |
19704 | static void | |
dee91e82 | 19705 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 19706 | const gdb_byte *info_ptr, |
dee91e82 DE |
19707 | struct die_info *comp_unit_die, |
19708 | int has_children, | |
19709 | void *data) | |
348e048f | 19710 | { |
dee91e82 | 19711 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 19712 | |
dee91e82 DE |
19713 | gdb_assert (cu->die_hash == NULL); |
19714 | cu->die_hash = | |
19715 | htab_create_alloc_ex (cu->header.length / 12, | |
19716 | die_hash, | |
19717 | die_eq, | |
19718 | NULL, | |
19719 | &cu->comp_unit_obstack, | |
19720 | hashtab_obstack_allocate, | |
19721 | dummy_obstack_deallocate); | |
348e048f | 19722 | |
dee91e82 DE |
19723 | if (has_children) |
19724 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
19725 | &info_ptr, comp_unit_die); | |
19726 | cu->dies = comp_unit_die; | |
19727 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
19728 | |
19729 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 19730 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 19731 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
19732 | or we won't be able to build types correctly. |
19733 | Similarly, if we do not read the producer, we can not apply | |
19734 | producer-specific interpretation. */ | |
95554aad | 19735 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 19736 | } |
348e048f | 19737 | |
3019eac3 DE |
19738 | /* Read in a signatured type and build its CU and DIEs. |
19739 | If the type is a stub for the real type in a DWO file, | |
19740 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
19741 | |
19742 | static void | |
19743 | read_signatured_type (struct signatured_type *sig_type) | |
19744 | { | |
19745 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 19746 | |
3019eac3 | 19747 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 19748 | gdb_assert (per_cu->cu == NULL); |
348e048f | 19749 | |
f4dc4d17 DE |
19750 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
19751 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 19752 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
19753 | } |
19754 | ||
c906108c SS |
19755 | /* Decode simple location descriptions. |
19756 | Given a pointer to a dwarf block that defines a location, compute | |
19757 | the location and return the value. | |
19758 | ||
4cecd739 DJ |
19759 | NOTE drow/2003-11-18: This function is called in two situations |
19760 | now: for the address of static or global variables (partial symbols | |
19761 | only) and for offsets into structures which are expected to be | |
19762 | (more or less) constant. The partial symbol case should go away, | |
19763 | and only the constant case should remain. That will let this | |
19764 | function complain more accurately. A few special modes are allowed | |
19765 | without complaint for global variables (for instance, global | |
19766 | register values and thread-local values). | |
c906108c SS |
19767 | |
19768 | A location description containing no operations indicates that the | |
4cecd739 | 19769 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
19770 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
19771 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
19772 | complaint. |
19773 | ||
19774 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
19775 | |
19776 | static CORE_ADDR | |
e7c27a73 | 19777 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 19778 | { |
e7c27a73 | 19779 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
19780 | size_t i; |
19781 | size_t size = blk->size; | |
d521ce57 | 19782 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
19783 | CORE_ADDR stack[64]; |
19784 | int stacki; | |
19785 | unsigned int bytes_read, unsnd; | |
19786 | gdb_byte op; | |
c906108c | 19787 | |
21ae7a4d JK |
19788 | i = 0; |
19789 | stacki = 0; | |
19790 | stack[stacki] = 0; | |
19791 | stack[++stacki] = 0; | |
19792 | ||
19793 | while (i < size) | |
19794 | { | |
19795 | op = data[i++]; | |
19796 | switch (op) | |
19797 | { | |
19798 | case DW_OP_lit0: | |
19799 | case DW_OP_lit1: | |
19800 | case DW_OP_lit2: | |
19801 | case DW_OP_lit3: | |
19802 | case DW_OP_lit4: | |
19803 | case DW_OP_lit5: | |
19804 | case DW_OP_lit6: | |
19805 | case DW_OP_lit7: | |
19806 | case DW_OP_lit8: | |
19807 | case DW_OP_lit9: | |
19808 | case DW_OP_lit10: | |
19809 | case DW_OP_lit11: | |
19810 | case DW_OP_lit12: | |
19811 | case DW_OP_lit13: | |
19812 | case DW_OP_lit14: | |
19813 | case DW_OP_lit15: | |
19814 | case DW_OP_lit16: | |
19815 | case DW_OP_lit17: | |
19816 | case DW_OP_lit18: | |
19817 | case DW_OP_lit19: | |
19818 | case DW_OP_lit20: | |
19819 | case DW_OP_lit21: | |
19820 | case DW_OP_lit22: | |
19821 | case DW_OP_lit23: | |
19822 | case DW_OP_lit24: | |
19823 | case DW_OP_lit25: | |
19824 | case DW_OP_lit26: | |
19825 | case DW_OP_lit27: | |
19826 | case DW_OP_lit28: | |
19827 | case DW_OP_lit29: | |
19828 | case DW_OP_lit30: | |
19829 | case DW_OP_lit31: | |
19830 | stack[++stacki] = op - DW_OP_lit0; | |
19831 | break; | |
f1bea926 | 19832 | |
21ae7a4d JK |
19833 | case DW_OP_reg0: |
19834 | case DW_OP_reg1: | |
19835 | case DW_OP_reg2: | |
19836 | case DW_OP_reg3: | |
19837 | case DW_OP_reg4: | |
19838 | case DW_OP_reg5: | |
19839 | case DW_OP_reg6: | |
19840 | case DW_OP_reg7: | |
19841 | case DW_OP_reg8: | |
19842 | case DW_OP_reg9: | |
19843 | case DW_OP_reg10: | |
19844 | case DW_OP_reg11: | |
19845 | case DW_OP_reg12: | |
19846 | case DW_OP_reg13: | |
19847 | case DW_OP_reg14: | |
19848 | case DW_OP_reg15: | |
19849 | case DW_OP_reg16: | |
19850 | case DW_OP_reg17: | |
19851 | case DW_OP_reg18: | |
19852 | case DW_OP_reg19: | |
19853 | case DW_OP_reg20: | |
19854 | case DW_OP_reg21: | |
19855 | case DW_OP_reg22: | |
19856 | case DW_OP_reg23: | |
19857 | case DW_OP_reg24: | |
19858 | case DW_OP_reg25: | |
19859 | case DW_OP_reg26: | |
19860 | case DW_OP_reg27: | |
19861 | case DW_OP_reg28: | |
19862 | case DW_OP_reg29: | |
19863 | case DW_OP_reg30: | |
19864 | case DW_OP_reg31: | |
19865 | stack[++stacki] = op - DW_OP_reg0; | |
19866 | if (i < size) | |
19867 | dwarf2_complex_location_expr_complaint (); | |
19868 | break; | |
c906108c | 19869 | |
21ae7a4d JK |
19870 | case DW_OP_regx: |
19871 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
19872 | i += bytes_read; | |
19873 | stack[++stacki] = unsnd; | |
19874 | if (i < size) | |
19875 | dwarf2_complex_location_expr_complaint (); | |
19876 | break; | |
c906108c | 19877 | |
21ae7a4d JK |
19878 | case DW_OP_addr: |
19879 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
19880 | cu, &bytes_read); | |
19881 | i += bytes_read; | |
19882 | break; | |
d53d4ac5 | 19883 | |
21ae7a4d JK |
19884 | case DW_OP_const1u: |
19885 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
19886 | i += 1; | |
19887 | break; | |
19888 | ||
19889 | case DW_OP_const1s: | |
19890 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
19891 | i += 1; | |
19892 | break; | |
19893 | ||
19894 | case DW_OP_const2u: | |
19895 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
19896 | i += 2; | |
19897 | break; | |
19898 | ||
19899 | case DW_OP_const2s: | |
19900 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
19901 | i += 2; | |
19902 | break; | |
d53d4ac5 | 19903 | |
21ae7a4d JK |
19904 | case DW_OP_const4u: |
19905 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
19906 | i += 4; | |
19907 | break; | |
19908 | ||
19909 | case DW_OP_const4s: | |
19910 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
19911 | i += 4; | |
19912 | break; | |
19913 | ||
585861ea JK |
19914 | case DW_OP_const8u: |
19915 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
19916 | i += 8; | |
19917 | break; | |
19918 | ||
21ae7a4d JK |
19919 | case DW_OP_constu: |
19920 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
19921 | &bytes_read); | |
19922 | i += bytes_read; | |
19923 | break; | |
19924 | ||
19925 | case DW_OP_consts: | |
19926 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
19927 | i += bytes_read; | |
19928 | break; | |
19929 | ||
19930 | case DW_OP_dup: | |
19931 | stack[stacki + 1] = stack[stacki]; | |
19932 | stacki++; | |
19933 | break; | |
19934 | ||
19935 | case DW_OP_plus: | |
19936 | stack[stacki - 1] += stack[stacki]; | |
19937 | stacki--; | |
19938 | break; | |
19939 | ||
19940 | case DW_OP_plus_uconst: | |
19941 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
19942 | &bytes_read); | |
19943 | i += bytes_read; | |
19944 | break; | |
19945 | ||
19946 | case DW_OP_minus: | |
19947 | stack[stacki - 1] -= stack[stacki]; | |
19948 | stacki--; | |
19949 | break; | |
19950 | ||
19951 | case DW_OP_deref: | |
19952 | /* If we're not the last op, then we definitely can't encode | |
19953 | this using GDB's address_class enum. This is valid for partial | |
19954 | global symbols, although the variable's address will be bogus | |
19955 | in the psymtab. */ | |
19956 | if (i < size) | |
19957 | dwarf2_complex_location_expr_complaint (); | |
19958 | break; | |
19959 | ||
19960 | case DW_OP_GNU_push_tls_address: | |
19961 | /* The top of the stack has the offset from the beginning | |
19962 | of the thread control block at which the variable is located. */ | |
19963 | /* Nothing should follow this operator, so the top of stack would | |
19964 | be returned. */ | |
19965 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
19966 | address will be bogus in the psymtab. Make it always at least |
19967 | non-zero to not look as a variable garbage collected by linker | |
19968 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
19969 | if (i < size) |
19970 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 19971 | stack[stacki]++; |
21ae7a4d JK |
19972 | break; |
19973 | ||
19974 | case DW_OP_GNU_uninit: | |
19975 | break; | |
19976 | ||
3019eac3 | 19977 | case DW_OP_GNU_addr_index: |
49f6c839 | 19978 | case DW_OP_GNU_const_index: |
3019eac3 DE |
19979 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
19980 | &bytes_read); | |
19981 | i += bytes_read; | |
19982 | break; | |
19983 | ||
21ae7a4d JK |
19984 | default: |
19985 | { | |
f39c6ffd | 19986 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
19987 | |
19988 | if (name) | |
19989 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
19990 | name); | |
19991 | else | |
19992 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
19993 | op); | |
19994 | } | |
19995 | ||
19996 | return (stack[stacki]); | |
d53d4ac5 | 19997 | } |
3c6e0cb3 | 19998 | |
21ae7a4d JK |
19999 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
20000 | outside of the allocated space. Also enforce minimum>0. */ | |
20001 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
20002 | { | |
20003 | complaint (&symfile_complaints, | |
20004 | _("location description stack overflow")); | |
20005 | return 0; | |
20006 | } | |
20007 | ||
20008 | if (stacki <= 0) | |
20009 | { | |
20010 | complaint (&symfile_complaints, | |
20011 | _("location description stack underflow")); | |
20012 | return 0; | |
20013 | } | |
20014 | } | |
20015 | return (stack[stacki]); | |
c906108c SS |
20016 | } |
20017 | ||
20018 | /* memory allocation interface */ | |
20019 | ||
c906108c | 20020 | static struct dwarf_block * |
7b5a2f43 | 20021 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
20022 | { |
20023 | struct dwarf_block *blk; | |
20024 | ||
20025 | blk = (struct dwarf_block *) | |
7b5a2f43 | 20026 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
20027 | return (blk); |
20028 | } | |
20029 | ||
c906108c | 20030 | static struct die_info * |
b60c80d6 | 20031 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
20032 | { |
20033 | struct die_info *die; | |
b60c80d6 DJ |
20034 | size_t size = sizeof (struct die_info); |
20035 | ||
20036 | if (num_attrs > 1) | |
20037 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 20038 | |
b60c80d6 | 20039 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
20040 | memset (die, 0, sizeof (struct die_info)); |
20041 | return (die); | |
20042 | } | |
2e276125 JB |
20043 | |
20044 | \f | |
20045 | /* Macro support. */ | |
20046 | ||
233d95b5 JK |
20047 | /* Return file name relative to the compilation directory of file number I in |
20048 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 20049 | responsible for freeing it. */ |
233d95b5 | 20050 | |
2e276125 | 20051 | static char * |
233d95b5 | 20052 | file_file_name (int file, struct line_header *lh) |
2e276125 | 20053 | { |
6a83a1e6 EZ |
20054 | /* Is the file number a valid index into the line header's file name |
20055 | table? Remember that file numbers start with one, not zero. */ | |
20056 | if (1 <= file && file <= lh->num_file_names) | |
20057 | { | |
20058 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 20059 | |
233d95b5 | 20060 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0) |
6a83a1e6 | 20061 | return xstrdup (fe->name); |
233d95b5 JK |
20062 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
20063 | fe->name, NULL); | |
6a83a1e6 | 20064 | } |
2e276125 JB |
20065 | else |
20066 | { | |
6a83a1e6 EZ |
20067 | /* The compiler produced a bogus file number. We can at least |
20068 | record the macro definitions made in the file, even if we | |
20069 | won't be able to find the file by name. */ | |
20070 | char fake_name[80]; | |
9a619af0 | 20071 | |
8c042590 PM |
20072 | xsnprintf (fake_name, sizeof (fake_name), |
20073 | "<bad macro file number %d>", file); | |
2e276125 | 20074 | |
6e70227d | 20075 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
20076 | _("bad file number in macro information (%d)"), |
20077 | file); | |
2e276125 | 20078 | |
6a83a1e6 | 20079 | return xstrdup (fake_name); |
2e276125 JB |
20080 | } |
20081 | } | |
20082 | ||
233d95b5 JK |
20083 | /* Return the full name of file number I in *LH's file name table. |
20084 | Use COMP_DIR as the name of the current directory of the | |
20085 | compilation. The result is allocated using xmalloc; the caller is | |
20086 | responsible for freeing it. */ | |
20087 | static char * | |
20088 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
20089 | { | |
20090 | /* Is the file number a valid index into the line header's file name | |
20091 | table? Remember that file numbers start with one, not zero. */ | |
20092 | if (1 <= file && file <= lh->num_file_names) | |
20093 | { | |
20094 | char *relative = file_file_name (file, lh); | |
20095 | ||
20096 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
20097 | return relative; | |
20098 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
20099 | } | |
20100 | else | |
20101 | return file_file_name (file, lh); | |
20102 | } | |
20103 | ||
2e276125 JB |
20104 | |
20105 | static struct macro_source_file * | |
20106 | macro_start_file (int file, int line, | |
20107 | struct macro_source_file *current_file, | |
20108 | const char *comp_dir, | |
20109 | struct line_header *lh, struct objfile *objfile) | |
20110 | { | |
233d95b5 JK |
20111 | /* File name relative to the compilation directory of this source file. */ |
20112 | char *file_name = file_file_name (file, lh); | |
2e276125 | 20113 | |
2e276125 | 20114 | if (! current_file) |
abc9d0dc | 20115 | { |
fc474241 DE |
20116 | /* Note: We don't create a macro table for this compilation unit |
20117 | at all until we actually get a filename. */ | |
20118 | struct macro_table *macro_table = get_macro_table (objfile, comp_dir); | |
20119 | ||
abc9d0dc TT |
20120 | /* If we have no current file, then this must be the start_file |
20121 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
20122 | current_file = macro_set_main (macro_table, file_name); |
20123 | macro_define_special (macro_table); | |
abc9d0dc | 20124 | } |
2e276125 | 20125 | else |
233d95b5 | 20126 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 20127 | |
233d95b5 | 20128 | xfree (file_name); |
6e70227d | 20129 | |
2e276125 JB |
20130 | return current_file; |
20131 | } | |
20132 | ||
20133 | ||
20134 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
20135 | followed by a null byte. */ | |
20136 | static char * | |
20137 | copy_string (const char *buf, int len) | |
20138 | { | |
20139 | char *s = xmalloc (len + 1); | |
9a619af0 | 20140 | |
2e276125 JB |
20141 | memcpy (s, buf, len); |
20142 | s[len] = '\0'; | |
2e276125 JB |
20143 | return s; |
20144 | } | |
20145 | ||
20146 | ||
20147 | static const char * | |
20148 | consume_improper_spaces (const char *p, const char *body) | |
20149 | { | |
20150 | if (*p == ' ') | |
20151 | { | |
4d3c2250 | 20152 | complaint (&symfile_complaints, |
3e43a32a MS |
20153 | _("macro definition contains spaces " |
20154 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 20155 | body); |
2e276125 JB |
20156 | |
20157 | while (*p == ' ') | |
20158 | p++; | |
20159 | } | |
20160 | ||
20161 | return p; | |
20162 | } | |
20163 | ||
20164 | ||
20165 | static void | |
20166 | parse_macro_definition (struct macro_source_file *file, int line, | |
20167 | const char *body) | |
20168 | { | |
20169 | const char *p; | |
20170 | ||
20171 | /* The body string takes one of two forms. For object-like macro | |
20172 | definitions, it should be: | |
20173 | ||
20174 | <macro name> " " <definition> | |
20175 | ||
20176 | For function-like macro definitions, it should be: | |
20177 | ||
20178 | <macro name> "() " <definition> | |
20179 | or | |
20180 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
20181 | ||
20182 | Spaces may appear only where explicitly indicated, and in the | |
20183 | <definition>. | |
20184 | ||
20185 | The Dwarf 2 spec says that an object-like macro's name is always | |
20186 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 20187 | the space when the macro's definition is the empty string. |
2e276125 JB |
20188 | |
20189 | The Dwarf 2 spec says that there should be no spaces between the | |
20190 | formal arguments in a function-like macro's formal argument list, | |
20191 | but versions of GCC around March 2002 include spaces after the | |
20192 | commas. */ | |
20193 | ||
20194 | ||
20195 | /* Find the extent of the macro name. The macro name is terminated | |
20196 | by either a space or null character (for an object-like macro) or | |
20197 | an opening paren (for a function-like macro). */ | |
20198 | for (p = body; *p; p++) | |
20199 | if (*p == ' ' || *p == '(') | |
20200 | break; | |
20201 | ||
20202 | if (*p == ' ' || *p == '\0') | |
20203 | { | |
20204 | /* It's an object-like macro. */ | |
20205 | int name_len = p - body; | |
20206 | char *name = copy_string (body, name_len); | |
20207 | const char *replacement; | |
20208 | ||
20209 | if (*p == ' ') | |
20210 | replacement = body + name_len + 1; | |
20211 | else | |
20212 | { | |
4d3c2250 | 20213 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20214 | replacement = body + name_len; |
20215 | } | |
6e70227d | 20216 | |
2e276125 JB |
20217 | macro_define_object (file, line, name, replacement); |
20218 | ||
20219 | xfree (name); | |
20220 | } | |
20221 | else if (*p == '(') | |
20222 | { | |
20223 | /* It's a function-like macro. */ | |
20224 | char *name = copy_string (body, p - body); | |
20225 | int argc = 0; | |
20226 | int argv_size = 1; | |
20227 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
20228 | ||
20229 | p++; | |
20230 | ||
20231 | p = consume_improper_spaces (p, body); | |
20232 | ||
20233 | /* Parse the formal argument list. */ | |
20234 | while (*p && *p != ')') | |
20235 | { | |
20236 | /* Find the extent of the current argument name. */ | |
20237 | const char *arg_start = p; | |
20238 | ||
20239 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
20240 | p++; | |
20241 | ||
20242 | if (! *p || p == arg_start) | |
4d3c2250 | 20243 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20244 | else |
20245 | { | |
20246 | /* Make sure argv has room for the new argument. */ | |
20247 | if (argc >= argv_size) | |
20248 | { | |
20249 | argv_size *= 2; | |
20250 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
20251 | } | |
20252 | ||
20253 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
20254 | } | |
20255 | ||
20256 | p = consume_improper_spaces (p, body); | |
20257 | ||
20258 | /* Consume the comma, if present. */ | |
20259 | if (*p == ',') | |
20260 | { | |
20261 | p++; | |
20262 | ||
20263 | p = consume_improper_spaces (p, body); | |
20264 | } | |
20265 | } | |
20266 | ||
20267 | if (*p == ')') | |
20268 | { | |
20269 | p++; | |
20270 | ||
20271 | if (*p == ' ') | |
20272 | /* Perfectly formed definition, no complaints. */ | |
20273 | macro_define_function (file, line, name, | |
6e70227d | 20274 | argc, (const char **) argv, |
2e276125 JB |
20275 | p + 1); |
20276 | else if (*p == '\0') | |
20277 | { | |
20278 | /* Complain, but do define it. */ | |
4d3c2250 | 20279 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 20280 | macro_define_function (file, line, name, |
6e70227d | 20281 | argc, (const char **) argv, |
2e276125 JB |
20282 | p); |
20283 | } | |
20284 | else | |
20285 | /* Just complain. */ | |
4d3c2250 | 20286 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20287 | } |
20288 | else | |
20289 | /* Just complain. */ | |
4d3c2250 | 20290 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20291 | |
20292 | xfree (name); | |
20293 | { | |
20294 | int i; | |
20295 | ||
20296 | for (i = 0; i < argc; i++) | |
20297 | xfree (argv[i]); | |
20298 | } | |
20299 | xfree (argv); | |
20300 | } | |
20301 | else | |
4d3c2250 | 20302 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20303 | } |
20304 | ||
cf2c3c16 TT |
20305 | /* Skip some bytes from BYTES according to the form given in FORM. |
20306 | Returns the new pointer. */ | |
2e276125 | 20307 | |
d521ce57 TT |
20308 | static const gdb_byte * |
20309 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
20310 | enum dwarf_form form, |
20311 | unsigned int offset_size, | |
20312 | struct dwarf2_section_info *section) | |
2e276125 | 20313 | { |
cf2c3c16 | 20314 | unsigned int bytes_read; |
2e276125 | 20315 | |
cf2c3c16 | 20316 | switch (form) |
2e276125 | 20317 | { |
cf2c3c16 TT |
20318 | case DW_FORM_data1: |
20319 | case DW_FORM_flag: | |
20320 | ++bytes; | |
20321 | break; | |
20322 | ||
20323 | case DW_FORM_data2: | |
20324 | bytes += 2; | |
20325 | break; | |
20326 | ||
20327 | case DW_FORM_data4: | |
20328 | bytes += 4; | |
20329 | break; | |
20330 | ||
20331 | case DW_FORM_data8: | |
20332 | bytes += 8; | |
20333 | break; | |
20334 | ||
20335 | case DW_FORM_string: | |
20336 | read_direct_string (abfd, bytes, &bytes_read); | |
20337 | bytes += bytes_read; | |
20338 | break; | |
20339 | ||
20340 | case DW_FORM_sec_offset: | |
20341 | case DW_FORM_strp: | |
36586728 | 20342 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
20343 | bytes += offset_size; |
20344 | break; | |
20345 | ||
20346 | case DW_FORM_block: | |
20347 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
20348 | bytes += bytes_read; | |
20349 | break; | |
20350 | ||
20351 | case DW_FORM_block1: | |
20352 | bytes += 1 + read_1_byte (abfd, bytes); | |
20353 | break; | |
20354 | case DW_FORM_block2: | |
20355 | bytes += 2 + read_2_bytes (abfd, bytes); | |
20356 | break; | |
20357 | case DW_FORM_block4: | |
20358 | bytes += 4 + read_4_bytes (abfd, bytes); | |
20359 | break; | |
20360 | ||
20361 | case DW_FORM_sdata: | |
20362 | case DW_FORM_udata: | |
3019eac3 DE |
20363 | case DW_FORM_GNU_addr_index: |
20364 | case DW_FORM_GNU_str_index: | |
d521ce57 | 20365 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
20366 | if (bytes == NULL) |
20367 | { | |
20368 | dwarf2_section_buffer_overflow_complaint (section); | |
20369 | return NULL; | |
20370 | } | |
cf2c3c16 TT |
20371 | break; |
20372 | ||
20373 | default: | |
20374 | { | |
20375 | complain: | |
20376 | complaint (&symfile_complaints, | |
20377 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 20378 | form, get_section_name (section)); |
cf2c3c16 TT |
20379 | return NULL; |
20380 | } | |
2e276125 JB |
20381 | } |
20382 | ||
cf2c3c16 TT |
20383 | return bytes; |
20384 | } | |
757a13d0 | 20385 | |
cf2c3c16 TT |
20386 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
20387 | opcode. Returns an updated pointer to the macro data buffer; or, | |
20388 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 20389 | |
d521ce57 | 20390 | static const gdb_byte * |
cf2c3c16 | 20391 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
20392 | const gdb_byte **opcode_definitions, |
20393 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
20394 | bfd *abfd, |
20395 | unsigned int offset_size, | |
20396 | struct dwarf2_section_info *section) | |
20397 | { | |
20398 | unsigned int bytes_read, i; | |
20399 | unsigned long arg; | |
d521ce57 | 20400 | const gdb_byte *defn; |
2e276125 | 20401 | |
cf2c3c16 | 20402 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 20403 | { |
cf2c3c16 TT |
20404 | complaint (&symfile_complaints, |
20405 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
20406 | opcode); | |
20407 | return NULL; | |
20408 | } | |
2e276125 | 20409 | |
cf2c3c16 TT |
20410 | defn = opcode_definitions[opcode]; |
20411 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
20412 | defn += bytes_read; | |
2e276125 | 20413 | |
cf2c3c16 TT |
20414 | for (i = 0; i < arg; ++i) |
20415 | { | |
f664829e DE |
20416 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
20417 | section); | |
cf2c3c16 TT |
20418 | if (mac_ptr == NULL) |
20419 | { | |
20420 | /* skip_form_bytes already issued the complaint. */ | |
20421 | return NULL; | |
20422 | } | |
20423 | } | |
757a13d0 | 20424 | |
cf2c3c16 TT |
20425 | return mac_ptr; |
20426 | } | |
757a13d0 | 20427 | |
cf2c3c16 TT |
20428 | /* A helper function which parses the header of a macro section. |
20429 | If the macro section is the extended (for now called "GNU") type, | |
20430 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
20431 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 20432 | |
d521ce57 TT |
20433 | static const gdb_byte * |
20434 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 20435 | bfd *abfd, |
d521ce57 | 20436 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
20437 | unsigned int *offset_size, |
20438 | int section_is_gnu) | |
20439 | { | |
20440 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 20441 | |
cf2c3c16 TT |
20442 | if (section_is_gnu) |
20443 | { | |
20444 | unsigned int version, flags; | |
757a13d0 | 20445 | |
cf2c3c16 TT |
20446 | version = read_2_bytes (abfd, mac_ptr); |
20447 | if (version != 4) | |
20448 | { | |
20449 | complaint (&symfile_complaints, | |
20450 | _("unrecognized version `%d' in .debug_macro section"), | |
20451 | version); | |
20452 | return NULL; | |
20453 | } | |
20454 | mac_ptr += 2; | |
757a13d0 | 20455 | |
cf2c3c16 TT |
20456 | flags = read_1_byte (abfd, mac_ptr); |
20457 | ++mac_ptr; | |
20458 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 20459 | |
cf2c3c16 TT |
20460 | if ((flags & 2) != 0) |
20461 | /* We don't need the line table offset. */ | |
20462 | mac_ptr += *offset_size; | |
757a13d0 | 20463 | |
cf2c3c16 TT |
20464 | /* Vendor opcode descriptions. */ |
20465 | if ((flags & 4) != 0) | |
20466 | { | |
20467 | unsigned int i, count; | |
757a13d0 | 20468 | |
cf2c3c16 TT |
20469 | count = read_1_byte (abfd, mac_ptr); |
20470 | ++mac_ptr; | |
20471 | for (i = 0; i < count; ++i) | |
20472 | { | |
20473 | unsigned int opcode, bytes_read; | |
20474 | unsigned long arg; | |
20475 | ||
20476 | opcode = read_1_byte (abfd, mac_ptr); | |
20477 | ++mac_ptr; | |
20478 | opcode_definitions[opcode] = mac_ptr; | |
20479 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20480 | mac_ptr += bytes_read; | |
20481 | mac_ptr += arg; | |
20482 | } | |
757a13d0 | 20483 | } |
cf2c3c16 | 20484 | } |
757a13d0 | 20485 | |
cf2c3c16 TT |
20486 | return mac_ptr; |
20487 | } | |
757a13d0 | 20488 | |
cf2c3c16 | 20489 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 20490 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
20491 | |
20492 | static void | |
d521ce57 TT |
20493 | dwarf_decode_macro_bytes (bfd *abfd, |
20494 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 20495 | struct macro_source_file *current_file, |
15d034d0 | 20496 | struct line_header *lh, const char *comp_dir, |
cf2c3c16 | 20497 | struct dwarf2_section_info *section, |
36586728 | 20498 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 20499 | unsigned int offset_size, |
8fc3fc34 TT |
20500 | struct objfile *objfile, |
20501 | htab_t include_hash) | |
cf2c3c16 TT |
20502 | { |
20503 | enum dwarf_macro_record_type macinfo_type; | |
20504 | int at_commandline; | |
d521ce57 | 20505 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 20506 | |
cf2c3c16 TT |
20507 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
20508 | &offset_size, section_is_gnu); | |
20509 | if (mac_ptr == NULL) | |
20510 | { | |
20511 | /* We already issued a complaint. */ | |
20512 | return; | |
20513 | } | |
757a13d0 JK |
20514 | |
20515 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
20516 | GDB is still reading the definitions from command line. First | |
20517 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
20518 | to create CURRENT_FILE for the main source holding also the command line | |
20519 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
20520 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
20521 | ||
20522 | at_commandline = 1; | |
20523 | ||
20524 | do | |
20525 | { | |
20526 | /* Do we at least have room for a macinfo type byte? */ | |
20527 | if (mac_ptr >= mac_end) | |
20528 | { | |
f664829e | 20529 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
20530 | break; |
20531 | } | |
20532 | ||
20533 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
20534 | mac_ptr++; | |
20535 | ||
cf2c3c16 TT |
20536 | /* Note that we rely on the fact that the corresponding GNU and |
20537 | DWARF constants are the same. */ | |
757a13d0 JK |
20538 | switch (macinfo_type) |
20539 | { | |
20540 | /* A zero macinfo type indicates the end of the macro | |
20541 | information. */ | |
20542 | case 0: | |
20543 | break; | |
2e276125 | 20544 | |
cf2c3c16 TT |
20545 | case DW_MACRO_GNU_define: |
20546 | case DW_MACRO_GNU_undef: | |
20547 | case DW_MACRO_GNU_define_indirect: | |
20548 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
20549 | case DW_MACRO_GNU_define_indirect_alt: |
20550 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 20551 | { |
891d2f0b | 20552 | unsigned int bytes_read; |
2e276125 | 20553 | int line; |
d521ce57 | 20554 | const char *body; |
cf2c3c16 | 20555 | int is_define; |
2e276125 | 20556 | |
cf2c3c16 TT |
20557 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
20558 | mac_ptr += bytes_read; | |
20559 | ||
20560 | if (macinfo_type == DW_MACRO_GNU_define | |
20561 | || macinfo_type == DW_MACRO_GNU_undef) | |
20562 | { | |
20563 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
20564 | mac_ptr += bytes_read; | |
20565 | } | |
20566 | else | |
20567 | { | |
20568 | LONGEST str_offset; | |
20569 | ||
20570 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
20571 | mac_ptr += offset_size; | |
2e276125 | 20572 | |
36586728 | 20573 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
20574 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
20575 | || section_is_dwz) | |
36586728 TT |
20576 | { |
20577 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
20578 | ||
20579 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
20580 | } | |
20581 | else | |
20582 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
20583 | } |
20584 | ||
20585 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
20586 | || macinfo_type == DW_MACRO_GNU_define_indirect |
20587 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 20588 | if (! current_file) |
757a13d0 JK |
20589 | { |
20590 | /* DWARF violation as no main source is present. */ | |
20591 | complaint (&symfile_complaints, | |
20592 | _("debug info with no main source gives macro %s " | |
20593 | "on line %d: %s"), | |
cf2c3c16 TT |
20594 | is_define ? _("definition") : _("undefinition"), |
20595 | line, body); | |
757a13d0 JK |
20596 | break; |
20597 | } | |
3e43a32a MS |
20598 | if ((line == 0 && !at_commandline) |
20599 | || (line != 0 && at_commandline)) | |
4d3c2250 | 20600 | complaint (&symfile_complaints, |
757a13d0 JK |
20601 | _("debug info gives %s macro %s with %s line %d: %s"), |
20602 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 20603 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
20604 | line == 0 ? _("zero") : _("non-zero"), line, body); |
20605 | ||
cf2c3c16 | 20606 | if (is_define) |
757a13d0 | 20607 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
20608 | else |
20609 | { | |
20610 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
20611 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
20612 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
20613 | macro_undef (current_file, line, body); |
20614 | } | |
2e276125 JB |
20615 | } |
20616 | break; | |
20617 | ||
cf2c3c16 | 20618 | case DW_MACRO_GNU_start_file: |
2e276125 | 20619 | { |
891d2f0b | 20620 | unsigned int bytes_read; |
2e276125 JB |
20621 | int line, file; |
20622 | ||
20623 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20624 | mac_ptr += bytes_read; | |
20625 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20626 | mac_ptr += bytes_read; | |
20627 | ||
3e43a32a MS |
20628 | if ((line == 0 && !at_commandline) |
20629 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
20630 | complaint (&symfile_complaints, |
20631 | _("debug info gives source %d included " | |
20632 | "from %s at %s line %d"), | |
20633 | file, at_commandline ? _("command-line") : _("file"), | |
20634 | line == 0 ? _("zero") : _("non-zero"), line); | |
20635 | ||
20636 | if (at_commandline) | |
20637 | { | |
cf2c3c16 TT |
20638 | /* This DW_MACRO_GNU_start_file was executed in the |
20639 | pass one. */ | |
757a13d0 JK |
20640 | at_commandline = 0; |
20641 | } | |
20642 | else | |
20643 | current_file = macro_start_file (file, line, | |
20644 | current_file, comp_dir, | |
cf2c3c16 | 20645 | lh, objfile); |
2e276125 JB |
20646 | } |
20647 | break; | |
20648 | ||
cf2c3c16 | 20649 | case DW_MACRO_GNU_end_file: |
2e276125 | 20650 | if (! current_file) |
4d3c2250 | 20651 | complaint (&symfile_complaints, |
3e43a32a MS |
20652 | _("macro debug info has an unmatched " |
20653 | "`close_file' directive")); | |
2e276125 JB |
20654 | else |
20655 | { | |
20656 | current_file = current_file->included_by; | |
20657 | if (! current_file) | |
20658 | { | |
cf2c3c16 | 20659 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
20660 | |
20661 | /* GCC circa March 2002 doesn't produce the zero | |
20662 | type byte marking the end of the compilation | |
20663 | unit. Complain if it's not there, but exit no | |
20664 | matter what. */ | |
20665 | ||
20666 | /* Do we at least have room for a macinfo type byte? */ | |
20667 | if (mac_ptr >= mac_end) | |
20668 | { | |
f664829e | 20669 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
20670 | return; |
20671 | } | |
20672 | ||
20673 | /* We don't increment mac_ptr here, so this is just | |
20674 | a look-ahead. */ | |
20675 | next_type = read_1_byte (abfd, mac_ptr); | |
20676 | if (next_type != 0) | |
4d3c2250 | 20677 | complaint (&symfile_complaints, |
3e43a32a MS |
20678 | _("no terminating 0-type entry for " |
20679 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
20680 | |
20681 | return; | |
20682 | } | |
20683 | } | |
20684 | break; | |
20685 | ||
cf2c3c16 | 20686 | case DW_MACRO_GNU_transparent_include: |
36586728 | 20687 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
20688 | { |
20689 | LONGEST offset; | |
8fc3fc34 | 20690 | void **slot; |
a036ba48 TT |
20691 | bfd *include_bfd = abfd; |
20692 | struct dwarf2_section_info *include_section = section; | |
20693 | struct dwarf2_section_info alt_section; | |
d521ce57 | 20694 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 20695 | int is_dwz = section_is_dwz; |
d521ce57 | 20696 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
20697 | |
20698 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
20699 | mac_ptr += offset_size; | |
20700 | ||
a036ba48 TT |
20701 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
20702 | { | |
20703 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
20704 | ||
20705 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
20706 | &dwz->macro); | |
20707 | ||
a036ba48 | 20708 | include_section = &dwz->macro; |
a32a8923 | 20709 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
20710 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
20711 | is_dwz = 1; | |
20712 | } | |
20713 | ||
20714 | new_mac_ptr = include_section->buffer + offset; | |
20715 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
20716 | ||
8fc3fc34 TT |
20717 | if (*slot != NULL) |
20718 | { | |
20719 | /* This has actually happened; see | |
20720 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
20721 | complaint (&symfile_complaints, | |
20722 | _("recursive DW_MACRO_GNU_transparent_include in " | |
20723 | ".debug_macro section")); | |
20724 | } | |
20725 | else | |
20726 | { | |
d521ce57 | 20727 | *slot = (void *) new_mac_ptr; |
36586728 | 20728 | |
a036ba48 | 20729 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 20730 | include_mac_end, current_file, |
8fc3fc34 | 20731 | lh, comp_dir, |
36586728 | 20732 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
20733 | offset_size, objfile, include_hash); |
20734 | ||
d521ce57 | 20735 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 20736 | } |
cf2c3c16 TT |
20737 | } |
20738 | break; | |
20739 | ||
2e276125 | 20740 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
20741 | if (!section_is_gnu) |
20742 | { | |
20743 | unsigned int bytes_read; | |
20744 | int constant; | |
2e276125 | 20745 | |
cf2c3c16 TT |
20746 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
20747 | mac_ptr += bytes_read; | |
20748 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
20749 | mac_ptr += bytes_read; | |
2e276125 | 20750 | |
cf2c3c16 TT |
20751 | /* We don't recognize any vendor extensions. */ |
20752 | break; | |
20753 | } | |
20754 | /* FALLTHROUGH */ | |
20755 | ||
20756 | default: | |
20757 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 20758 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
20759 | section); |
20760 | if (mac_ptr == NULL) | |
20761 | return; | |
20762 | break; | |
2e276125 | 20763 | } |
757a13d0 | 20764 | } while (macinfo_type != 0); |
2e276125 | 20765 | } |
8e19ed76 | 20766 | |
cf2c3c16 | 20767 | static void |
09262596 | 20768 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
15d034d0 | 20769 | const char *comp_dir, int section_is_gnu) |
cf2c3c16 | 20770 | { |
bb5ed363 | 20771 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
20772 | struct line_header *lh = cu->line_header; |
20773 | bfd *abfd; | |
d521ce57 | 20774 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
20775 | struct macro_source_file *current_file = 0; |
20776 | enum dwarf_macro_record_type macinfo_type; | |
20777 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 20778 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
20779 | struct cleanup *cleanup; |
20780 | htab_t include_hash; | |
20781 | void **slot; | |
09262596 DE |
20782 | struct dwarf2_section_info *section; |
20783 | const char *section_name; | |
20784 | ||
20785 | if (cu->dwo_unit != NULL) | |
20786 | { | |
20787 | if (section_is_gnu) | |
20788 | { | |
20789 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
20790 | section_name = ".debug_macro.dwo"; | |
20791 | } | |
20792 | else | |
20793 | { | |
20794 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
20795 | section_name = ".debug_macinfo.dwo"; | |
20796 | } | |
20797 | } | |
20798 | else | |
20799 | { | |
20800 | if (section_is_gnu) | |
20801 | { | |
20802 | section = &dwarf2_per_objfile->macro; | |
20803 | section_name = ".debug_macro"; | |
20804 | } | |
20805 | else | |
20806 | { | |
20807 | section = &dwarf2_per_objfile->macinfo; | |
20808 | section_name = ".debug_macinfo"; | |
20809 | } | |
20810 | } | |
cf2c3c16 | 20811 | |
bb5ed363 | 20812 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
20813 | if (section->buffer == NULL) |
20814 | { | |
fceca515 | 20815 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
20816 | return; |
20817 | } | |
a32a8923 | 20818 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
20819 | |
20820 | /* First pass: Find the name of the base filename. | |
20821 | This filename is needed in order to process all macros whose definition | |
20822 | (or undefinition) comes from the command line. These macros are defined | |
20823 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
20824 | associated to the base file. | |
20825 | ||
20826 | To determine the base file name, we scan the macro definitions until we | |
20827 | reach the first DW_MACINFO_start_file entry. We then initialize | |
20828 | CURRENT_FILE accordingly so that any macro definition found before the | |
20829 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
20830 | ||
20831 | mac_ptr = section->buffer + offset; | |
20832 | mac_end = section->buffer + section->size; | |
20833 | ||
20834 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
20835 | &offset_size, section_is_gnu); | |
20836 | if (mac_ptr == NULL) | |
20837 | { | |
20838 | /* We already issued a complaint. */ | |
20839 | return; | |
20840 | } | |
20841 | ||
20842 | do | |
20843 | { | |
20844 | /* Do we at least have room for a macinfo type byte? */ | |
20845 | if (mac_ptr >= mac_end) | |
20846 | { | |
20847 | /* Complaint is printed during the second pass as GDB will probably | |
20848 | stop the first pass earlier upon finding | |
20849 | DW_MACINFO_start_file. */ | |
20850 | break; | |
20851 | } | |
20852 | ||
20853 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
20854 | mac_ptr++; | |
20855 | ||
20856 | /* Note that we rely on the fact that the corresponding GNU and | |
20857 | DWARF constants are the same. */ | |
20858 | switch (macinfo_type) | |
20859 | { | |
20860 | /* A zero macinfo type indicates the end of the macro | |
20861 | information. */ | |
20862 | case 0: | |
20863 | break; | |
20864 | ||
20865 | case DW_MACRO_GNU_define: | |
20866 | case DW_MACRO_GNU_undef: | |
20867 | /* Only skip the data by MAC_PTR. */ | |
20868 | { | |
20869 | unsigned int bytes_read; | |
20870 | ||
20871 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20872 | mac_ptr += bytes_read; | |
20873 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
20874 | mac_ptr += bytes_read; | |
20875 | } | |
20876 | break; | |
20877 | ||
20878 | case DW_MACRO_GNU_start_file: | |
20879 | { | |
20880 | unsigned int bytes_read; | |
20881 | int line, file; | |
20882 | ||
20883 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20884 | mac_ptr += bytes_read; | |
20885 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20886 | mac_ptr += bytes_read; | |
20887 | ||
20888 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 20889 | comp_dir, lh, objfile); |
cf2c3c16 TT |
20890 | } |
20891 | break; | |
20892 | ||
20893 | case DW_MACRO_GNU_end_file: | |
20894 | /* No data to skip by MAC_PTR. */ | |
20895 | break; | |
20896 | ||
20897 | case DW_MACRO_GNU_define_indirect: | |
20898 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
20899 | case DW_MACRO_GNU_define_indirect_alt: |
20900 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
20901 | { |
20902 | unsigned int bytes_read; | |
20903 | ||
20904 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20905 | mac_ptr += bytes_read; | |
20906 | mac_ptr += offset_size; | |
20907 | } | |
20908 | break; | |
20909 | ||
20910 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 20911 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
20912 | /* Note that, according to the spec, a transparent include |
20913 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
20914 | skip this opcode. */ | |
20915 | mac_ptr += offset_size; | |
20916 | break; | |
20917 | ||
20918 | case DW_MACINFO_vendor_ext: | |
20919 | /* Only skip the data by MAC_PTR. */ | |
20920 | if (!section_is_gnu) | |
20921 | { | |
20922 | unsigned int bytes_read; | |
20923 | ||
20924 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20925 | mac_ptr += bytes_read; | |
20926 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
20927 | mac_ptr += bytes_read; | |
20928 | } | |
20929 | /* FALLTHROUGH */ | |
20930 | ||
20931 | default: | |
20932 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 20933 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
20934 | section); |
20935 | if (mac_ptr == NULL) | |
20936 | return; | |
20937 | break; | |
20938 | } | |
20939 | } while (macinfo_type != 0 && current_file == NULL); | |
20940 | ||
20941 | /* Second pass: Process all entries. | |
20942 | ||
20943 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
20944 | command-line macro definitions/undefinitions. This flag is unset when we | |
20945 | reach the first DW_MACINFO_start_file entry. */ | |
20946 | ||
8fc3fc34 TT |
20947 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
20948 | NULL, xcalloc, xfree); | |
20949 | cleanup = make_cleanup_htab_delete (include_hash); | |
20950 | mac_ptr = section->buffer + offset; | |
20951 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 20952 | *slot = (void *) mac_ptr; |
8fc3fc34 | 20953 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
36586728 TT |
20954 | current_file, lh, comp_dir, section, |
20955 | section_is_gnu, 0, | |
8fc3fc34 TT |
20956 | offset_size, objfile, include_hash); |
20957 | do_cleanups (cleanup); | |
cf2c3c16 TT |
20958 | } |
20959 | ||
8e19ed76 | 20960 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 20961 | if so return true else false. */ |
380bca97 | 20962 | |
8e19ed76 | 20963 | static int |
6e5a29e1 | 20964 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
20965 | { |
20966 | return (attr == NULL ? 0 : | |
20967 | attr->form == DW_FORM_block1 | |
20968 | || attr->form == DW_FORM_block2 | |
20969 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
20970 | || attr->form == DW_FORM_block |
20971 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 20972 | } |
4c2df51b | 20973 | |
c6a0999f JB |
20974 | /* Return non-zero if ATTR's value is a section offset --- classes |
20975 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
20976 | You may use DW_UNSND (attr) to retrieve such offsets. | |
20977 | ||
20978 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
20979 | may have a value that belongs to more than one of these classes; it | |
20980 | would be ambiguous if we did, because we use the same forms for all | |
20981 | of them. */ | |
380bca97 | 20982 | |
3690dd37 | 20983 | static int |
6e5a29e1 | 20984 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
20985 | { |
20986 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
20987 | || attr->form == DW_FORM_data8 |
20988 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
20989 | } |
20990 | ||
3690dd37 JB |
20991 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
20992 | zero otherwise. When this function returns true, you can apply | |
20993 | dwarf2_get_attr_constant_value to it. | |
20994 | ||
20995 | However, note that for some attributes you must check | |
20996 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
20997 | and DW_FORM_data8 are members of both the constant class, and of | |
20998 | the classes that contain offsets into other debug sections | |
20999 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
21000 | that, if an attribute's can be either a constant or one of the | |
21001 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
21002 | taken as section offsets, not constants. */ | |
380bca97 | 21003 | |
3690dd37 | 21004 | static int |
6e5a29e1 | 21005 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
21006 | { |
21007 | switch (attr->form) | |
21008 | { | |
21009 | case DW_FORM_sdata: | |
21010 | case DW_FORM_udata: | |
21011 | case DW_FORM_data1: | |
21012 | case DW_FORM_data2: | |
21013 | case DW_FORM_data4: | |
21014 | case DW_FORM_data8: | |
21015 | return 1; | |
21016 | default: | |
21017 | return 0; | |
21018 | } | |
21019 | } | |
21020 | ||
7771576e SA |
21021 | |
21022 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
21023 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
21024 | ||
21025 | static int | |
6e5a29e1 | 21026 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
21027 | { |
21028 | switch (attr->form) | |
21029 | { | |
21030 | case DW_FORM_ref_addr: | |
21031 | case DW_FORM_ref1: | |
21032 | case DW_FORM_ref2: | |
21033 | case DW_FORM_ref4: | |
21034 | case DW_FORM_ref8: | |
21035 | case DW_FORM_ref_udata: | |
21036 | case DW_FORM_GNU_ref_alt: | |
21037 | return 1; | |
21038 | default: | |
21039 | return 0; | |
21040 | } | |
21041 | } | |
21042 | ||
3019eac3 DE |
21043 | /* Return the .debug_loc section to use for CU. |
21044 | For DWO files use .debug_loc.dwo. */ | |
21045 | ||
21046 | static struct dwarf2_section_info * | |
21047 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
21048 | { | |
21049 | if (cu->dwo_unit) | |
21050 | return &cu->dwo_unit->dwo_file->sections.loc; | |
21051 | return &dwarf2_per_objfile->loc; | |
21052 | } | |
21053 | ||
8cf6f0b1 TT |
21054 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
21055 | ||
21056 | static void | |
21057 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
21058 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 21059 | const struct attribute *attr) |
8cf6f0b1 | 21060 | { |
3019eac3 DE |
21061 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
21062 | ||
21063 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
21064 | |
21065 | baton->per_cu = cu->per_cu; | |
21066 | gdb_assert (baton->per_cu); | |
21067 | /* We don't know how long the location list is, but make sure we | |
21068 | don't run off the edge of the section. */ | |
3019eac3 DE |
21069 | baton->size = section->size - DW_UNSND (attr); |
21070 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 21071 | baton->base_address = cu->base_address; |
f664829e | 21072 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
21073 | } |
21074 | ||
4c2df51b | 21075 | static void |
ff39bb5e | 21076 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 21077 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 21078 | { |
bb5ed363 | 21079 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 21080 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 21081 | |
3690dd37 | 21082 | if (attr_form_is_section_offset (attr) |
3019eac3 | 21083 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
21084 | the section. If so, fall through to the complaint in the |
21085 | other branch. */ | |
3019eac3 | 21086 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 21087 | { |
0d53c4c4 | 21088 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 21089 | |
bb5ed363 | 21090 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 21091 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 21092 | |
8cf6f0b1 | 21093 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 21094 | |
d00adf39 | 21095 | if (cu->base_known == 0) |
0d53c4c4 | 21096 | complaint (&symfile_complaints, |
3e43a32a MS |
21097 | _("Location list used without " |
21098 | "specifying the CU base address.")); | |
4c2df51b | 21099 | |
f1e6e072 TT |
21100 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21101 | ? dwarf2_loclist_block_index | |
21102 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
21103 | SYMBOL_LOCATION_BATON (sym) = baton; |
21104 | } | |
21105 | else | |
21106 | { | |
21107 | struct dwarf2_locexpr_baton *baton; | |
21108 | ||
bb5ed363 | 21109 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 21110 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
21111 | baton->per_cu = cu->per_cu; |
21112 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
21113 | |
21114 | if (attr_form_is_block (attr)) | |
21115 | { | |
21116 | /* Note that we're just copying the block's data pointer | |
21117 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
21118 | info_buffer for SYM's objfile; right now we never release |
21119 | that buffer, but when we do clean up properly this may | |
21120 | need to change. */ | |
0d53c4c4 DJ |
21121 | baton->size = DW_BLOCK (attr)->size; |
21122 | baton->data = DW_BLOCK (attr)->data; | |
21123 | } | |
21124 | else | |
21125 | { | |
21126 | dwarf2_invalid_attrib_class_complaint ("location description", | |
21127 | SYMBOL_NATURAL_NAME (sym)); | |
21128 | baton->size = 0; | |
0d53c4c4 | 21129 | } |
6e70227d | 21130 | |
f1e6e072 TT |
21131 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21132 | ? dwarf2_locexpr_block_index | |
21133 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
21134 | SYMBOL_LOCATION_BATON (sym) = baton; |
21135 | } | |
4c2df51b | 21136 | } |
6502dd73 | 21137 | |
9aa1f1e3 TT |
21138 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
21139 | came from a separate debuginfo file, then the master objfile is | |
21140 | returned. */ | |
ae0d2f24 UW |
21141 | |
21142 | struct objfile * | |
21143 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
21144 | { | |
9291a0cd | 21145 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
21146 | |
21147 | /* Return the master objfile, so that we can report and look up the | |
21148 | correct file containing this variable. */ | |
21149 | if (objfile->separate_debug_objfile_backlink) | |
21150 | objfile = objfile->separate_debug_objfile_backlink; | |
21151 | ||
21152 | return objfile; | |
21153 | } | |
21154 | ||
96408a79 SA |
21155 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
21156 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
21157 | CU_HEADERP first. */ | |
21158 | ||
21159 | static const struct comp_unit_head * | |
21160 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
21161 | struct dwarf2_per_cu_data *per_cu) | |
21162 | { | |
d521ce57 | 21163 | const gdb_byte *info_ptr; |
96408a79 SA |
21164 | |
21165 | if (per_cu->cu) | |
21166 | return &per_cu->cu->header; | |
21167 | ||
8a0459fd | 21168 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
21169 | |
21170 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 21171 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
21172 | |
21173 | return cu_headerp; | |
21174 | } | |
21175 | ||
ae0d2f24 UW |
21176 | /* Return the address size given in the compilation unit header for CU. */ |
21177 | ||
98714339 | 21178 | int |
ae0d2f24 UW |
21179 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
21180 | { | |
96408a79 SA |
21181 | struct comp_unit_head cu_header_local; |
21182 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 21183 | |
96408a79 SA |
21184 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21185 | ||
21186 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
21187 | } |
21188 | ||
9eae7c52 TT |
21189 | /* Return the offset size given in the compilation unit header for CU. */ |
21190 | ||
21191 | int | |
21192 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
21193 | { | |
96408a79 SA |
21194 | struct comp_unit_head cu_header_local; |
21195 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 21196 | |
96408a79 SA |
21197 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21198 | ||
21199 | return cu_headerp->offset_size; | |
21200 | } | |
21201 | ||
21202 | /* See its dwarf2loc.h declaration. */ | |
21203 | ||
21204 | int | |
21205 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
21206 | { | |
21207 | struct comp_unit_head cu_header_local; | |
21208 | const struct comp_unit_head *cu_headerp; | |
21209 | ||
21210 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
21211 | ||
21212 | if (cu_headerp->version == 2) | |
21213 | return cu_headerp->addr_size; | |
21214 | else | |
21215 | return cu_headerp->offset_size; | |
181cebd4 JK |
21216 | } |
21217 | ||
9aa1f1e3 TT |
21218 | /* Return the text offset of the CU. The returned offset comes from |
21219 | this CU's objfile. If this objfile came from a separate debuginfo | |
21220 | file, then the offset may be different from the corresponding | |
21221 | offset in the parent objfile. */ | |
21222 | ||
21223 | CORE_ADDR | |
21224 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
21225 | { | |
bb3fa9d0 | 21226 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
21227 | |
21228 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
21229 | } | |
21230 | ||
348e048f DE |
21231 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
21232 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
21233 | |
21234 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 21235 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 21236 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
21237 | struct objfile *objfile) |
21238 | { | |
21239 | struct dwarf2_per_cu_data *this_cu; | |
21240 | int low, high; | |
36586728 | 21241 | const sect_offset *cu_off; |
ae038cb0 | 21242 | |
ae038cb0 DJ |
21243 | low = 0; |
21244 | high = dwarf2_per_objfile->n_comp_units - 1; | |
21245 | while (high > low) | |
21246 | { | |
36586728 | 21247 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 21248 | int mid = low + (high - low) / 2; |
9a619af0 | 21249 | |
36586728 TT |
21250 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
21251 | cu_off = &mid_cu->offset; | |
21252 | if (mid_cu->is_dwz > offset_in_dwz | |
21253 | || (mid_cu->is_dwz == offset_in_dwz | |
21254 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
21255 | high = mid; |
21256 | else | |
21257 | low = mid + 1; | |
21258 | } | |
21259 | gdb_assert (low == high); | |
36586728 TT |
21260 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
21261 | cu_off = &this_cu->offset; | |
21262 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 21263 | { |
36586728 | 21264 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
21265 | error (_("Dwarf Error: could not find partial DIE containing " |
21266 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 21267 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 21268 | |
b64f50a1 JK |
21269 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
21270 | <= offset.sect_off); | |
ae038cb0 DJ |
21271 | return dwarf2_per_objfile->all_comp_units[low-1]; |
21272 | } | |
21273 | else | |
21274 | { | |
21275 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
21276 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
21277 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
21278 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
21279 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
21280 | return this_cu; |
21281 | } | |
21282 | } | |
21283 | ||
23745b47 | 21284 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 21285 | |
9816fde3 | 21286 | static void |
23745b47 | 21287 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 21288 | { |
9816fde3 | 21289 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
21290 | per_cu->cu = cu; |
21291 | cu->per_cu = per_cu; | |
21292 | cu->objfile = per_cu->objfile; | |
93311388 | 21293 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
21294 | } |
21295 | ||
21296 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
21297 | ||
21298 | static void | |
95554aad TT |
21299 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
21300 | enum language pretend_language) | |
9816fde3 JK |
21301 | { |
21302 | struct attribute *attr; | |
21303 | ||
21304 | /* Set the language we're debugging. */ | |
21305 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
21306 | if (attr) | |
21307 | set_cu_language (DW_UNSND (attr), cu); | |
21308 | else | |
9cded63f | 21309 | { |
95554aad | 21310 | cu->language = pretend_language; |
9cded63f TT |
21311 | cu->language_defn = language_def (cu->language); |
21312 | } | |
dee91e82 DE |
21313 | |
21314 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
21315 | if (attr) | |
21316 | cu->producer = DW_STRING (attr); | |
93311388 DE |
21317 | } |
21318 | ||
ae038cb0 DJ |
21319 | /* Release one cached compilation unit, CU. We unlink it from the tree |
21320 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
21321 | the caller is responsible for that. |
21322 | NOTE: DATA is a void * because this function is also used as a | |
21323 | cleanup routine. */ | |
ae038cb0 DJ |
21324 | |
21325 | static void | |
68dc6402 | 21326 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
21327 | { |
21328 | struct dwarf2_cu *cu = data; | |
21329 | ||
23745b47 DE |
21330 | gdb_assert (cu->per_cu != NULL); |
21331 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
21332 | cu->per_cu = NULL; |
21333 | ||
21334 | obstack_free (&cu->comp_unit_obstack, NULL); | |
21335 | ||
21336 | xfree (cu); | |
21337 | } | |
21338 | ||
72bf9492 | 21339 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 21340 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 21341 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
21342 | |
21343 | static void | |
21344 | free_stack_comp_unit (void *data) | |
21345 | { | |
21346 | struct dwarf2_cu *cu = data; | |
21347 | ||
23745b47 DE |
21348 | gdb_assert (cu->per_cu != NULL); |
21349 | cu->per_cu->cu = NULL; | |
21350 | cu->per_cu = NULL; | |
21351 | ||
72bf9492 DJ |
21352 | obstack_free (&cu->comp_unit_obstack, NULL); |
21353 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
21354 | } |
21355 | ||
21356 | /* Free all cached compilation units. */ | |
21357 | ||
21358 | static void | |
21359 | free_cached_comp_units (void *data) | |
21360 | { | |
21361 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21362 | ||
21363 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21364 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21365 | while (per_cu != NULL) | |
21366 | { | |
21367 | struct dwarf2_per_cu_data *next_cu; | |
21368 | ||
21369 | next_cu = per_cu->cu->read_in_chain; | |
21370 | ||
68dc6402 | 21371 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
21372 | *last_chain = next_cu; |
21373 | ||
21374 | per_cu = next_cu; | |
21375 | } | |
21376 | } | |
21377 | ||
21378 | /* Increase the age counter on each cached compilation unit, and free | |
21379 | any that are too old. */ | |
21380 | ||
21381 | static void | |
21382 | age_cached_comp_units (void) | |
21383 | { | |
21384 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21385 | ||
21386 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
21387 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21388 | while (per_cu != NULL) | |
21389 | { | |
21390 | per_cu->cu->last_used ++; | |
21391 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
21392 | dwarf2_mark (per_cu->cu); | |
21393 | per_cu = per_cu->cu->read_in_chain; | |
21394 | } | |
21395 | ||
21396 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21397 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21398 | while (per_cu != NULL) | |
21399 | { | |
21400 | struct dwarf2_per_cu_data *next_cu; | |
21401 | ||
21402 | next_cu = per_cu->cu->read_in_chain; | |
21403 | ||
21404 | if (!per_cu->cu->mark) | |
21405 | { | |
68dc6402 | 21406 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
21407 | *last_chain = next_cu; |
21408 | } | |
21409 | else | |
21410 | last_chain = &per_cu->cu->read_in_chain; | |
21411 | ||
21412 | per_cu = next_cu; | |
21413 | } | |
21414 | } | |
21415 | ||
21416 | /* Remove a single compilation unit from the cache. */ | |
21417 | ||
21418 | static void | |
dee91e82 | 21419 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
21420 | { |
21421 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21422 | ||
21423 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21424 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21425 | while (per_cu != NULL) | |
21426 | { | |
21427 | struct dwarf2_per_cu_data *next_cu; | |
21428 | ||
21429 | next_cu = per_cu->cu->read_in_chain; | |
21430 | ||
dee91e82 | 21431 | if (per_cu == target_per_cu) |
ae038cb0 | 21432 | { |
68dc6402 | 21433 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 21434 | per_cu->cu = NULL; |
ae038cb0 DJ |
21435 | *last_chain = next_cu; |
21436 | break; | |
21437 | } | |
21438 | else | |
21439 | last_chain = &per_cu->cu->read_in_chain; | |
21440 | ||
21441 | per_cu = next_cu; | |
21442 | } | |
21443 | } | |
21444 | ||
fe3e1990 DJ |
21445 | /* Release all extra memory associated with OBJFILE. */ |
21446 | ||
21447 | void | |
21448 | dwarf2_free_objfile (struct objfile *objfile) | |
21449 | { | |
21450 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
21451 | ||
21452 | if (dwarf2_per_objfile == NULL) | |
21453 | return; | |
21454 | ||
21455 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
21456 | free_cached_comp_units (NULL); | |
21457 | ||
7b9f3c50 DE |
21458 | if (dwarf2_per_objfile->quick_file_names_table) |
21459 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 21460 | |
fe3e1990 DJ |
21461 | /* Everything else should be on the objfile obstack. */ |
21462 | } | |
21463 | ||
dee91e82 DE |
21464 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
21465 | We store these in a hash table separate from the DIEs, and preserve them | |
21466 | when the DIEs are flushed out of cache. | |
21467 | ||
21468 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 21469 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
21470 | or the type may come from a DWO file. Furthermore, while it's more logical |
21471 | to use per_cu->section+offset, with Fission the section with the data is in | |
21472 | the DWO file but we don't know that section at the point we need it. | |
21473 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
21474 | because we can enter the lookup routine, get_die_type_at_offset, from | |
21475 | outside this file, and thus won't necessarily have PER_CU->cu. | |
21476 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 21477 | |
dee91e82 | 21478 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 21479 | { |
dee91e82 | 21480 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 21481 | sect_offset offset; |
1c379e20 DJ |
21482 | struct type *type; |
21483 | }; | |
21484 | ||
dee91e82 | 21485 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
21486 | |
21487 | static hashval_t | |
dee91e82 | 21488 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 21489 | { |
dee91e82 | 21490 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 21491 | |
dee91e82 | 21492 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
21493 | } |
21494 | ||
dee91e82 | 21495 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
21496 | |
21497 | static int | |
dee91e82 | 21498 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 21499 | { |
dee91e82 DE |
21500 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
21501 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 21502 | |
dee91e82 DE |
21503 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
21504 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
21505 | } |
21506 | ||
21507 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
21508 | table if necessary. For convenience, return TYPE. |
21509 | ||
21510 | The DIEs reading must have careful ordering to: | |
21511 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
21512 | reading current DIE. | |
21513 | * Not trying to dereference contents of still incompletely read in types | |
21514 | while reading in other DIEs. | |
21515 | * Enable referencing still incompletely read in types just by a pointer to | |
21516 | the type without accessing its fields. | |
21517 | ||
21518 | Therefore caller should follow these rules: | |
21519 | * Try to fetch any prerequisite types we may need to build this DIE type | |
21520 | before building the type and calling set_die_type. | |
e71ec853 | 21521 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
21522 | possible before fetching more types to complete the current type. |
21523 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 21524 | |
f792889a | 21525 | static struct type * |
1c379e20 DJ |
21526 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
21527 | { | |
dee91e82 | 21528 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 21529 | struct objfile *objfile = cu->objfile; |
1c379e20 | 21530 | |
b4ba55a1 JB |
21531 | /* For Ada types, make sure that the gnat-specific data is always |
21532 | initialized (if not already set). There are a few types where | |
21533 | we should not be doing so, because the type-specific area is | |
21534 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
21535 | where the type-specific area is used to store the floatformat). | |
21536 | But this is not a problem, because the gnat-specific information | |
21537 | is actually not needed for these types. */ | |
21538 | if (need_gnat_info (cu) | |
21539 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
21540 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
21541 | && !HAVE_GNAT_AUX_INFO (type)) | |
21542 | INIT_GNAT_SPECIFIC (type); | |
21543 | ||
dee91e82 | 21544 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 21545 | { |
dee91e82 DE |
21546 | dwarf2_per_objfile->die_type_hash = |
21547 | htab_create_alloc_ex (127, | |
21548 | per_cu_offset_and_type_hash, | |
21549 | per_cu_offset_and_type_eq, | |
21550 | NULL, | |
21551 | &objfile->objfile_obstack, | |
21552 | hashtab_obstack_allocate, | |
21553 | dummy_obstack_deallocate); | |
f792889a | 21554 | } |
1c379e20 | 21555 | |
dee91e82 | 21556 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
21557 | ofs.offset = die->offset; |
21558 | ofs.type = type; | |
dee91e82 DE |
21559 | slot = (struct dwarf2_per_cu_offset_and_type **) |
21560 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
21561 | if (*slot) |
21562 | complaint (&symfile_complaints, | |
21563 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 21564 | die->offset.sect_off); |
673bfd45 | 21565 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 21566 | **slot = ofs; |
f792889a | 21567 | return type; |
1c379e20 DJ |
21568 | } |
21569 | ||
02142a6c DE |
21570 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
21571 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
21572 | |
21573 | static struct type * | |
b64f50a1 | 21574 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 21575 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 21576 | { |
dee91e82 | 21577 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 21578 | |
dee91e82 | 21579 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 21580 | return NULL; |
1c379e20 | 21581 | |
dee91e82 | 21582 | ofs.per_cu = per_cu; |
673bfd45 | 21583 | ofs.offset = offset; |
dee91e82 | 21584 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
21585 | if (slot) |
21586 | return slot->type; | |
21587 | else | |
21588 | return NULL; | |
21589 | } | |
21590 | ||
02142a6c | 21591 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
21592 | or return NULL if DIE does not have a saved type. */ |
21593 | ||
21594 | static struct type * | |
21595 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
21596 | { | |
21597 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
21598 | } | |
21599 | ||
10b3939b DJ |
21600 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
21601 | ||
21602 | static void | |
21603 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
21604 | struct dwarf2_per_cu_data *ref_per_cu) | |
21605 | { | |
21606 | void **slot; | |
21607 | ||
21608 | if (cu->dependencies == NULL) | |
21609 | cu->dependencies | |
21610 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
21611 | NULL, &cu->comp_unit_obstack, | |
21612 | hashtab_obstack_allocate, | |
21613 | dummy_obstack_deallocate); | |
21614 | ||
21615 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
21616 | if (*slot == NULL) | |
21617 | *slot = ref_per_cu; | |
21618 | } | |
1c379e20 | 21619 | |
f504f079 DE |
21620 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
21621 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
21622 | cache that we must keep because we are keeping CU. */ |
21623 | ||
10b3939b DJ |
21624 | static int |
21625 | dwarf2_mark_helper (void **slot, void *data) | |
21626 | { | |
21627 | struct dwarf2_per_cu_data *per_cu; | |
21628 | ||
21629 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
21630 | |
21631 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
21632 | reading of the chain. As such dependencies remain valid it is not much | |
21633 | useful to track and undo them during QUIT cleanups. */ | |
21634 | if (per_cu->cu == NULL) | |
21635 | return 1; | |
21636 | ||
10b3939b DJ |
21637 | if (per_cu->cu->mark) |
21638 | return 1; | |
21639 | per_cu->cu->mark = 1; | |
21640 | ||
21641 | if (per_cu->cu->dependencies != NULL) | |
21642 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
21643 | ||
21644 | return 1; | |
21645 | } | |
21646 | ||
f504f079 DE |
21647 | /* Set the mark field in CU and in every other compilation unit in the |
21648 | cache that we must keep because we are keeping CU. */ | |
21649 | ||
ae038cb0 DJ |
21650 | static void |
21651 | dwarf2_mark (struct dwarf2_cu *cu) | |
21652 | { | |
21653 | if (cu->mark) | |
21654 | return; | |
21655 | cu->mark = 1; | |
10b3939b DJ |
21656 | if (cu->dependencies != NULL) |
21657 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
21658 | } |
21659 | ||
21660 | static void | |
21661 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
21662 | { | |
21663 | while (per_cu) | |
21664 | { | |
21665 | per_cu->cu->mark = 0; | |
21666 | per_cu = per_cu->cu->read_in_chain; | |
21667 | } | |
72bf9492 DJ |
21668 | } |
21669 | ||
72bf9492 DJ |
21670 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
21671 | is its offset in .debug_info for this objfile. */ | |
21672 | ||
21673 | static hashval_t | |
21674 | partial_die_hash (const void *item) | |
21675 | { | |
21676 | const struct partial_die_info *part_die = item; | |
9a619af0 | 21677 | |
b64f50a1 | 21678 | return part_die->offset.sect_off; |
72bf9492 DJ |
21679 | } |
21680 | ||
21681 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
21682 | are equal if they have the same offset. */ | |
21683 | ||
21684 | static int | |
21685 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
21686 | { | |
21687 | const struct partial_die_info *part_die_lhs = item_lhs; | |
21688 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 21689 | |
b64f50a1 | 21690 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
21691 | } |
21692 | ||
ae038cb0 DJ |
21693 | static struct cmd_list_element *set_dwarf2_cmdlist; |
21694 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
21695 | ||
21696 | static void | |
21697 | set_dwarf2_cmd (char *args, int from_tty) | |
21698 | { | |
21699 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
21700 | } | |
21701 | ||
21702 | static void | |
21703 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 21704 | { |
ae038cb0 DJ |
21705 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
21706 | } | |
21707 | ||
4bf44c1c | 21708 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
21709 | |
21710 | static void | |
c1bd65d0 | 21711 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
21712 | { |
21713 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 21714 | int ix; |
8b70b953 | 21715 | |
626f2d1c TT |
21716 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
21717 | cleaning up. */ | |
21718 | dwarf2_per_objfile = NULL; | |
21719 | ||
59b0c7c1 JB |
21720 | for (ix = 0; ix < data->n_comp_units; ++ix) |
21721 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 21722 | |
59b0c7c1 | 21723 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 21724 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
21725 | data->all_type_units[ix]->per_cu.imported_symtabs); |
21726 | xfree (data->all_type_units); | |
95554aad | 21727 | |
8b70b953 | 21728 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
21729 | |
21730 | if (data->dwo_files) | |
21731 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
21732 | if (data->dwp_file) |
21733 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
21734 | |
21735 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
21736 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
21737 | } |
21738 | ||
21739 | \f | |
ae2de4f8 | 21740 | /* The "save gdb-index" command. */ |
9291a0cd TT |
21741 | |
21742 | /* The contents of the hash table we create when building the string | |
21743 | table. */ | |
21744 | struct strtab_entry | |
21745 | { | |
21746 | offset_type offset; | |
21747 | const char *str; | |
21748 | }; | |
21749 | ||
559a7a62 JK |
21750 | /* Hash function for a strtab_entry. |
21751 | ||
21752 | Function is used only during write_hash_table so no index format backward | |
21753 | compatibility is needed. */ | |
b89be57b | 21754 | |
9291a0cd TT |
21755 | static hashval_t |
21756 | hash_strtab_entry (const void *e) | |
21757 | { | |
21758 | const struct strtab_entry *entry = e; | |
559a7a62 | 21759 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
21760 | } |
21761 | ||
21762 | /* Equality function for a strtab_entry. */ | |
b89be57b | 21763 | |
9291a0cd TT |
21764 | static int |
21765 | eq_strtab_entry (const void *a, const void *b) | |
21766 | { | |
21767 | const struct strtab_entry *ea = a; | |
21768 | const struct strtab_entry *eb = b; | |
21769 | return !strcmp (ea->str, eb->str); | |
21770 | } | |
21771 | ||
21772 | /* Create a strtab_entry hash table. */ | |
b89be57b | 21773 | |
9291a0cd TT |
21774 | static htab_t |
21775 | create_strtab (void) | |
21776 | { | |
21777 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
21778 | xfree, xcalloc, xfree); | |
21779 | } | |
21780 | ||
21781 | /* Add a string to the constant pool. Return the string's offset in | |
21782 | host order. */ | |
b89be57b | 21783 | |
9291a0cd TT |
21784 | static offset_type |
21785 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
21786 | { | |
21787 | void **slot; | |
21788 | struct strtab_entry entry; | |
21789 | struct strtab_entry *result; | |
21790 | ||
21791 | entry.str = str; | |
21792 | slot = htab_find_slot (table, &entry, INSERT); | |
21793 | if (*slot) | |
21794 | result = *slot; | |
21795 | else | |
21796 | { | |
21797 | result = XNEW (struct strtab_entry); | |
21798 | result->offset = obstack_object_size (cpool); | |
21799 | result->str = str; | |
21800 | obstack_grow_str0 (cpool, str); | |
21801 | *slot = result; | |
21802 | } | |
21803 | return result->offset; | |
21804 | } | |
21805 | ||
21806 | /* An entry in the symbol table. */ | |
21807 | struct symtab_index_entry | |
21808 | { | |
21809 | /* The name of the symbol. */ | |
21810 | const char *name; | |
21811 | /* The offset of the name in the constant pool. */ | |
21812 | offset_type index_offset; | |
21813 | /* A sorted vector of the indices of all the CUs that hold an object | |
21814 | of this name. */ | |
21815 | VEC (offset_type) *cu_indices; | |
21816 | }; | |
21817 | ||
21818 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
21819 | struct mapped_symtab | |
21820 | { | |
21821 | offset_type n_elements; | |
21822 | offset_type size; | |
21823 | struct symtab_index_entry **data; | |
21824 | }; | |
21825 | ||
21826 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 21827 | |
9291a0cd TT |
21828 | static hashval_t |
21829 | hash_symtab_entry (const void *e) | |
21830 | { | |
21831 | const struct symtab_index_entry *entry = e; | |
21832 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
21833 | sizeof (offset_type) * VEC_length (offset_type, | |
21834 | entry->cu_indices), | |
21835 | 0); | |
21836 | } | |
21837 | ||
21838 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 21839 | |
9291a0cd TT |
21840 | static int |
21841 | eq_symtab_entry (const void *a, const void *b) | |
21842 | { | |
21843 | const struct symtab_index_entry *ea = a; | |
21844 | const struct symtab_index_entry *eb = b; | |
21845 | int len = VEC_length (offset_type, ea->cu_indices); | |
21846 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
21847 | return 0; | |
21848 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
21849 | VEC_address (offset_type, eb->cu_indices), | |
21850 | sizeof (offset_type) * len); | |
21851 | } | |
21852 | ||
21853 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 21854 | |
9291a0cd TT |
21855 | static void |
21856 | delete_symtab_entry (void *p) | |
21857 | { | |
21858 | struct symtab_index_entry *entry = p; | |
21859 | VEC_free (offset_type, entry->cu_indices); | |
21860 | xfree (entry); | |
21861 | } | |
21862 | ||
21863 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 21864 | |
9291a0cd | 21865 | static htab_t |
3876f04e | 21866 | create_symbol_hash_table (void) |
9291a0cd TT |
21867 | { |
21868 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
21869 | delete_symtab_entry, xcalloc, xfree); | |
21870 | } | |
21871 | ||
21872 | /* Create a new mapped symtab object. */ | |
b89be57b | 21873 | |
9291a0cd TT |
21874 | static struct mapped_symtab * |
21875 | create_mapped_symtab (void) | |
21876 | { | |
21877 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
21878 | symtab->n_elements = 0; | |
21879 | symtab->size = 1024; | |
21880 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
21881 | return symtab; | |
21882 | } | |
21883 | ||
21884 | /* Destroy a mapped_symtab. */ | |
b89be57b | 21885 | |
9291a0cd TT |
21886 | static void |
21887 | cleanup_mapped_symtab (void *p) | |
21888 | { | |
21889 | struct mapped_symtab *symtab = p; | |
21890 | /* The contents of the array are freed when the other hash table is | |
21891 | destroyed. */ | |
21892 | xfree (symtab->data); | |
21893 | xfree (symtab); | |
21894 | } | |
21895 | ||
21896 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
21897 | the slot. |
21898 | ||
21899 | Function is used only during write_hash_table so no index format backward | |
21900 | compatibility is needed. */ | |
b89be57b | 21901 | |
9291a0cd TT |
21902 | static struct symtab_index_entry ** |
21903 | find_slot (struct mapped_symtab *symtab, const char *name) | |
21904 | { | |
559a7a62 | 21905 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
21906 | |
21907 | index = hash & (symtab->size - 1); | |
21908 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
21909 | ||
21910 | for (;;) | |
21911 | { | |
21912 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
21913 | return &symtab->data[index]; | |
21914 | index = (index + step) & (symtab->size - 1); | |
21915 | } | |
21916 | } | |
21917 | ||
21918 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 21919 | |
9291a0cd TT |
21920 | static void |
21921 | hash_expand (struct mapped_symtab *symtab) | |
21922 | { | |
21923 | offset_type old_size = symtab->size; | |
21924 | offset_type i; | |
21925 | struct symtab_index_entry **old_entries = symtab->data; | |
21926 | ||
21927 | symtab->size *= 2; | |
21928 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
21929 | ||
21930 | for (i = 0; i < old_size; ++i) | |
21931 | { | |
21932 | if (old_entries[i]) | |
21933 | { | |
21934 | struct symtab_index_entry **slot = find_slot (symtab, | |
21935 | old_entries[i]->name); | |
21936 | *slot = old_entries[i]; | |
21937 | } | |
21938 | } | |
21939 | ||
21940 | xfree (old_entries); | |
21941 | } | |
21942 | ||
156942c7 DE |
21943 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
21944 | CU_INDEX is the index of the CU in which the symbol appears. | |
21945 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 21946 | |
9291a0cd TT |
21947 | static void |
21948 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 21949 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
21950 | offset_type cu_index) |
21951 | { | |
21952 | struct symtab_index_entry **slot; | |
156942c7 | 21953 | offset_type cu_index_and_attrs; |
9291a0cd TT |
21954 | |
21955 | ++symtab->n_elements; | |
21956 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
21957 | hash_expand (symtab); | |
21958 | ||
21959 | slot = find_slot (symtab, name); | |
21960 | if (!*slot) | |
21961 | { | |
21962 | *slot = XNEW (struct symtab_index_entry); | |
21963 | (*slot)->name = name; | |
156942c7 | 21964 | /* index_offset is set later. */ |
9291a0cd TT |
21965 | (*slot)->cu_indices = NULL; |
21966 | } | |
156942c7 DE |
21967 | |
21968 | cu_index_and_attrs = 0; | |
21969 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
21970 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
21971 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
21972 | ||
21973 | /* We don't want to record an index value twice as we want to avoid the | |
21974 | duplication. | |
21975 | We process all global symbols and then all static symbols | |
21976 | (which would allow us to avoid the duplication by only having to check | |
21977 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
21978 | To keep things simple we don't worry about the duplication here and | |
21979 | sort and uniqufy the list after we've processed all symbols. */ | |
21980 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
21981 | } | |
21982 | ||
21983 | /* qsort helper routine for uniquify_cu_indices. */ | |
21984 | ||
21985 | static int | |
21986 | offset_type_compare (const void *ap, const void *bp) | |
21987 | { | |
21988 | offset_type a = *(offset_type *) ap; | |
21989 | offset_type b = *(offset_type *) bp; | |
21990 | ||
21991 | return (a > b) - (b > a); | |
21992 | } | |
21993 | ||
21994 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
21995 | ||
21996 | static void | |
21997 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
21998 | { | |
21999 | int i; | |
22000 | ||
22001 | for (i = 0; i < symtab->size; ++i) | |
22002 | { | |
22003 | struct symtab_index_entry *entry = symtab->data[i]; | |
22004 | ||
22005 | if (entry | |
22006 | && entry->cu_indices != NULL) | |
22007 | { | |
22008 | unsigned int next_to_insert, next_to_check; | |
22009 | offset_type last_value; | |
22010 | ||
22011 | qsort (VEC_address (offset_type, entry->cu_indices), | |
22012 | VEC_length (offset_type, entry->cu_indices), | |
22013 | sizeof (offset_type), offset_type_compare); | |
22014 | ||
22015 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
22016 | next_to_insert = 1; | |
22017 | for (next_to_check = 1; | |
22018 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
22019 | ++next_to_check) | |
22020 | { | |
22021 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
22022 | != last_value) | |
22023 | { | |
22024 | last_value = VEC_index (offset_type, entry->cu_indices, | |
22025 | next_to_check); | |
22026 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
22027 | last_value); | |
22028 | ++next_to_insert; | |
22029 | } | |
22030 | } | |
22031 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
22032 | } | |
22033 | } | |
9291a0cd TT |
22034 | } |
22035 | ||
22036 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 22037 | |
9291a0cd | 22038 | static offset_type |
3876f04e | 22039 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
22040 | struct symtab_index_entry *entry) |
22041 | { | |
22042 | void **slot; | |
22043 | ||
3876f04e | 22044 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
22045 | if (!*slot) |
22046 | { | |
22047 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
22048 | offset_type val = MAYBE_SWAP (len); | |
22049 | offset_type iter; | |
22050 | int i; | |
22051 | ||
22052 | *slot = entry; | |
22053 | entry->index_offset = obstack_object_size (cpool); | |
22054 | ||
22055 | obstack_grow (cpool, &val, sizeof (val)); | |
22056 | for (i = 0; | |
22057 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
22058 | ++i) | |
22059 | { | |
22060 | val = MAYBE_SWAP (iter); | |
22061 | obstack_grow (cpool, &val, sizeof (val)); | |
22062 | } | |
22063 | } | |
22064 | else | |
22065 | { | |
22066 | struct symtab_index_entry *old_entry = *slot; | |
22067 | entry->index_offset = old_entry->index_offset; | |
22068 | entry = old_entry; | |
22069 | } | |
22070 | return entry->index_offset; | |
22071 | } | |
22072 | ||
22073 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
22074 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 22075 | |
9291a0cd TT |
22076 | static void |
22077 | write_hash_table (struct mapped_symtab *symtab, | |
22078 | struct obstack *output, struct obstack *cpool) | |
22079 | { | |
22080 | offset_type i; | |
3876f04e | 22081 | htab_t symbol_hash_table; |
9291a0cd TT |
22082 | htab_t str_table; |
22083 | ||
3876f04e | 22084 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 22085 | str_table = create_strtab (); |
3876f04e | 22086 | |
9291a0cd TT |
22087 | /* We add all the index vectors to the constant pool first, to |
22088 | ensure alignment is ok. */ | |
22089 | for (i = 0; i < symtab->size; ++i) | |
22090 | { | |
22091 | if (symtab->data[i]) | |
3876f04e | 22092 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
22093 | } |
22094 | ||
22095 | /* Now write out the hash table. */ | |
22096 | for (i = 0; i < symtab->size; ++i) | |
22097 | { | |
22098 | offset_type str_off, vec_off; | |
22099 | ||
22100 | if (symtab->data[i]) | |
22101 | { | |
22102 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
22103 | vec_off = symtab->data[i]->index_offset; | |
22104 | } | |
22105 | else | |
22106 | { | |
22107 | /* While 0 is a valid constant pool index, it is not valid | |
22108 | to have 0 for both offsets. */ | |
22109 | str_off = 0; | |
22110 | vec_off = 0; | |
22111 | } | |
22112 | ||
22113 | str_off = MAYBE_SWAP (str_off); | |
22114 | vec_off = MAYBE_SWAP (vec_off); | |
22115 | ||
22116 | obstack_grow (output, &str_off, sizeof (str_off)); | |
22117 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
22118 | } | |
22119 | ||
22120 | htab_delete (str_table); | |
3876f04e | 22121 | htab_delete (symbol_hash_table); |
9291a0cd TT |
22122 | } |
22123 | ||
0a5429f6 DE |
22124 | /* Struct to map psymtab to CU index in the index file. */ |
22125 | struct psymtab_cu_index_map | |
22126 | { | |
22127 | struct partial_symtab *psymtab; | |
22128 | unsigned int cu_index; | |
22129 | }; | |
22130 | ||
22131 | static hashval_t | |
22132 | hash_psymtab_cu_index (const void *item) | |
22133 | { | |
22134 | const struct psymtab_cu_index_map *map = item; | |
22135 | ||
22136 | return htab_hash_pointer (map->psymtab); | |
22137 | } | |
22138 | ||
22139 | static int | |
22140 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
22141 | { | |
22142 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
22143 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
22144 | ||
22145 | return lhs->psymtab == rhs->psymtab; | |
22146 | } | |
22147 | ||
22148 | /* Helper struct for building the address table. */ | |
22149 | struct addrmap_index_data | |
22150 | { | |
22151 | struct objfile *objfile; | |
22152 | struct obstack *addr_obstack; | |
22153 | htab_t cu_index_htab; | |
22154 | ||
22155 | /* Non-zero if the previous_* fields are valid. | |
22156 | We can't write an entry until we see the next entry (since it is only then | |
22157 | that we know the end of the entry). */ | |
22158 | int previous_valid; | |
22159 | /* Index of the CU in the table of all CUs in the index file. */ | |
22160 | unsigned int previous_cu_index; | |
0963b4bd | 22161 | /* Start address of the CU. */ |
0a5429f6 DE |
22162 | CORE_ADDR previous_cu_start; |
22163 | }; | |
22164 | ||
22165 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 22166 | |
9291a0cd | 22167 | static void |
0a5429f6 DE |
22168 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
22169 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 22170 | { |
0a5429f6 | 22171 | offset_type cu_index_to_write; |
948f8e3d | 22172 | gdb_byte addr[8]; |
9291a0cd TT |
22173 | CORE_ADDR baseaddr; |
22174 | ||
22175 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22176 | ||
0a5429f6 DE |
22177 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
22178 | obstack_grow (obstack, addr, 8); | |
22179 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
22180 | obstack_grow (obstack, addr, 8); | |
22181 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
22182 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
22183 | } | |
22184 | ||
22185 | /* Worker function for traversing an addrmap to build the address table. */ | |
22186 | ||
22187 | static int | |
22188 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
22189 | { | |
22190 | struct addrmap_index_data *data = datap; | |
22191 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
22192 | |
22193 | if (data->previous_valid) | |
22194 | add_address_entry (data->objfile, data->addr_obstack, | |
22195 | data->previous_cu_start, start_addr, | |
22196 | data->previous_cu_index); | |
22197 | ||
22198 | data->previous_cu_start = start_addr; | |
22199 | if (pst != NULL) | |
22200 | { | |
22201 | struct psymtab_cu_index_map find_map, *map; | |
22202 | find_map.psymtab = pst; | |
22203 | map = htab_find (data->cu_index_htab, &find_map); | |
22204 | gdb_assert (map != NULL); | |
22205 | data->previous_cu_index = map->cu_index; | |
22206 | data->previous_valid = 1; | |
22207 | } | |
22208 | else | |
22209 | data->previous_valid = 0; | |
22210 | ||
22211 | return 0; | |
22212 | } | |
22213 | ||
22214 | /* Write OBJFILE's address map to OBSTACK. | |
22215 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
22216 | in the index file. */ | |
22217 | ||
22218 | static void | |
22219 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
22220 | htab_t cu_index_htab) | |
22221 | { | |
22222 | struct addrmap_index_data addrmap_index_data; | |
22223 | ||
22224 | /* When writing the address table, we have to cope with the fact that | |
22225 | the addrmap iterator only provides the start of a region; we have to | |
22226 | wait until the next invocation to get the start of the next region. */ | |
22227 | ||
22228 | addrmap_index_data.objfile = objfile; | |
22229 | addrmap_index_data.addr_obstack = obstack; | |
22230 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
22231 | addrmap_index_data.previous_valid = 0; | |
22232 | ||
22233 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
22234 | &addrmap_index_data); | |
22235 | ||
22236 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
22237 | is valid, but we should still handle it. | |
22238 | The end address is recorded as the start of the next region, but that | |
22239 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
22240 | anyway. */ | |
22241 | if (addrmap_index_data.previous_valid) | |
22242 | add_address_entry (objfile, obstack, | |
22243 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
22244 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
22245 | } |
22246 | ||
156942c7 DE |
22247 | /* Return the symbol kind of PSYM. */ |
22248 | ||
22249 | static gdb_index_symbol_kind | |
22250 | symbol_kind (struct partial_symbol *psym) | |
22251 | { | |
22252 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
22253 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
22254 | ||
22255 | switch (domain) | |
22256 | { | |
22257 | case VAR_DOMAIN: | |
22258 | switch (aclass) | |
22259 | { | |
22260 | case LOC_BLOCK: | |
22261 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
22262 | case LOC_TYPEDEF: | |
22263 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
22264 | case LOC_COMPUTED: | |
22265 | case LOC_CONST_BYTES: | |
22266 | case LOC_OPTIMIZED_OUT: | |
22267 | case LOC_STATIC: | |
22268 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
22269 | case LOC_CONST: | |
22270 | /* Note: It's currently impossible to recognize psyms as enum values | |
22271 | short of reading the type info. For now punt. */ | |
22272 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
22273 | default: | |
22274 | /* There are other LOC_FOO values that one might want to classify | |
22275 | as variables, but dwarf2read.c doesn't currently use them. */ | |
22276 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
22277 | } | |
22278 | case STRUCT_DOMAIN: | |
22279 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
22280 | default: | |
22281 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
22282 | } | |
22283 | } | |
22284 | ||
9291a0cd | 22285 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 22286 | |
9291a0cd TT |
22287 | static void |
22288 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 22289 | htab_t psyms_seen, |
9291a0cd TT |
22290 | struct partial_symbol **psymp, |
22291 | int count, | |
987d643c TT |
22292 | offset_type cu_index, |
22293 | int is_static) | |
9291a0cd TT |
22294 | { |
22295 | for (; count-- > 0; ++psymp) | |
22296 | { | |
156942c7 DE |
22297 | struct partial_symbol *psym = *psymp; |
22298 | void **slot; | |
987d643c | 22299 | |
156942c7 | 22300 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 22301 | error (_("Ada is not currently supported by the index")); |
987d643c | 22302 | |
987d643c | 22303 | /* Only add a given psymbol once. */ |
156942c7 | 22304 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
22305 | if (!*slot) |
22306 | { | |
156942c7 DE |
22307 | gdb_index_symbol_kind kind = symbol_kind (psym); |
22308 | ||
22309 | *slot = psym; | |
22310 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
22311 | is_static, kind, cu_index); | |
987d643c | 22312 | } |
9291a0cd TT |
22313 | } |
22314 | } | |
22315 | ||
22316 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
22317 | exception if there is an error. */ | |
b89be57b | 22318 | |
9291a0cd TT |
22319 | static void |
22320 | write_obstack (FILE *file, struct obstack *obstack) | |
22321 | { | |
22322 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
22323 | file) | |
22324 | != obstack_object_size (obstack)) | |
22325 | error (_("couldn't data write to file")); | |
22326 | } | |
22327 | ||
22328 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 22329 | |
9291a0cd TT |
22330 | static void |
22331 | unlink_if_set (void *p) | |
22332 | { | |
22333 | char **filename = p; | |
22334 | if (*filename) | |
22335 | unlink (*filename); | |
22336 | } | |
22337 | ||
1fd400ff TT |
22338 | /* A helper struct used when iterating over debug_types. */ |
22339 | struct signatured_type_index_data | |
22340 | { | |
22341 | struct objfile *objfile; | |
22342 | struct mapped_symtab *symtab; | |
22343 | struct obstack *types_list; | |
987d643c | 22344 | htab_t psyms_seen; |
1fd400ff TT |
22345 | int cu_index; |
22346 | }; | |
22347 | ||
22348 | /* A helper function that writes a single signatured_type to an | |
22349 | obstack. */ | |
b89be57b | 22350 | |
1fd400ff TT |
22351 | static int |
22352 | write_one_signatured_type (void **slot, void *d) | |
22353 | { | |
22354 | struct signatured_type_index_data *info = d; | |
22355 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
0186c6a7 | 22356 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
22357 | gdb_byte val[8]; |
22358 | ||
22359 | write_psymbols (info->symtab, | |
987d643c | 22360 | info->psyms_seen, |
3e43a32a MS |
22361 | info->objfile->global_psymbols.list |
22362 | + psymtab->globals_offset, | |
987d643c TT |
22363 | psymtab->n_global_syms, info->cu_index, |
22364 | 0); | |
1fd400ff | 22365 | write_psymbols (info->symtab, |
987d643c | 22366 | info->psyms_seen, |
3e43a32a MS |
22367 | info->objfile->static_psymbols.list |
22368 | + psymtab->statics_offset, | |
987d643c TT |
22369 | psymtab->n_static_syms, info->cu_index, |
22370 | 1); | |
1fd400ff | 22371 | |
b64f50a1 JK |
22372 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22373 | entry->per_cu.offset.sect_off); | |
1fd400ff | 22374 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
22375 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22376 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
22377 | obstack_grow (info->types_list, val, 8); |
22378 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
22379 | obstack_grow (info->types_list, val, 8); | |
22380 | ||
22381 | ++info->cu_index; | |
22382 | ||
22383 | return 1; | |
22384 | } | |
22385 | ||
95554aad TT |
22386 | /* Recurse into all "included" dependencies and write their symbols as |
22387 | if they appeared in this psymtab. */ | |
22388 | ||
22389 | static void | |
22390 | recursively_write_psymbols (struct objfile *objfile, | |
22391 | struct partial_symtab *psymtab, | |
22392 | struct mapped_symtab *symtab, | |
22393 | htab_t psyms_seen, | |
22394 | offset_type cu_index) | |
22395 | { | |
22396 | int i; | |
22397 | ||
22398 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
22399 | if (psymtab->dependencies[i]->user != NULL) | |
22400 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
22401 | symtab, psyms_seen, cu_index); | |
22402 | ||
22403 | write_psymbols (symtab, | |
22404 | psyms_seen, | |
22405 | objfile->global_psymbols.list + psymtab->globals_offset, | |
22406 | psymtab->n_global_syms, cu_index, | |
22407 | 0); | |
22408 | write_psymbols (symtab, | |
22409 | psyms_seen, | |
22410 | objfile->static_psymbols.list + psymtab->statics_offset, | |
22411 | psymtab->n_static_syms, cu_index, | |
22412 | 1); | |
22413 | } | |
22414 | ||
9291a0cd | 22415 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 22416 | |
9291a0cd TT |
22417 | static void |
22418 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
22419 | { | |
22420 | struct cleanup *cleanup; | |
22421 | char *filename, *cleanup_filename; | |
1fd400ff TT |
22422 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
22423 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
22424 | int i; |
22425 | FILE *out_file; | |
22426 | struct mapped_symtab *symtab; | |
22427 | offset_type val, size_of_contents, total_len; | |
22428 | struct stat st; | |
987d643c | 22429 | htab_t psyms_seen; |
0a5429f6 DE |
22430 | htab_t cu_index_htab; |
22431 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 22432 | |
9291a0cd TT |
22433 | if (dwarf2_per_objfile->using_index) |
22434 | error (_("Cannot use an index to create the index")); | |
22435 | ||
8b70b953 TT |
22436 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
22437 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
22438 | ||
260b681b DE |
22439 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
22440 | return; | |
22441 | ||
4262abfb JK |
22442 | if (stat (objfile_name (objfile), &st) < 0) |
22443 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 22444 | |
4262abfb | 22445 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
22446 | INDEX_SUFFIX, (char *) NULL); |
22447 | cleanup = make_cleanup (xfree, filename); | |
22448 | ||
614c279d | 22449 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
22450 | if (!out_file) |
22451 | error (_("Can't open `%s' for writing"), filename); | |
22452 | ||
22453 | cleanup_filename = filename; | |
22454 | make_cleanup (unlink_if_set, &cleanup_filename); | |
22455 | ||
22456 | symtab = create_mapped_symtab (); | |
22457 | make_cleanup (cleanup_mapped_symtab, symtab); | |
22458 | ||
22459 | obstack_init (&addr_obstack); | |
22460 | make_cleanup_obstack_free (&addr_obstack); | |
22461 | ||
22462 | obstack_init (&cu_list); | |
22463 | make_cleanup_obstack_free (&cu_list); | |
22464 | ||
1fd400ff TT |
22465 | obstack_init (&types_cu_list); |
22466 | make_cleanup_obstack_free (&types_cu_list); | |
22467 | ||
987d643c TT |
22468 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
22469 | NULL, xcalloc, xfree); | |
96408a79 | 22470 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 22471 | |
0a5429f6 DE |
22472 | /* While we're scanning CU's create a table that maps a psymtab pointer |
22473 | (which is what addrmap records) to its index (which is what is recorded | |
22474 | in the index file). This will later be needed to write the address | |
22475 | table. */ | |
22476 | cu_index_htab = htab_create_alloc (100, | |
22477 | hash_psymtab_cu_index, | |
22478 | eq_psymtab_cu_index, | |
22479 | NULL, xcalloc, xfree); | |
96408a79 | 22480 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
22481 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
22482 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
22483 | * dwarf2_per_objfile->n_comp_units); | |
22484 | make_cleanup (xfree, psymtab_cu_index_map); | |
22485 | ||
22486 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
22487 | work here. Also, the debug_types entries do not appear in |
22488 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
22489 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
22490 | { | |
3e43a32a MS |
22491 | struct dwarf2_per_cu_data *per_cu |
22492 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 22493 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 22494 | gdb_byte val[8]; |
0a5429f6 DE |
22495 | struct psymtab_cu_index_map *map; |
22496 | void **slot; | |
9291a0cd | 22497 | |
92fac807 JK |
22498 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
22499 | It may be referenced from a local scope but in such case it does not | |
22500 | need to be present in .gdb_index. */ | |
22501 | if (psymtab == NULL) | |
22502 | continue; | |
22503 | ||
95554aad TT |
22504 | if (psymtab->user == NULL) |
22505 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 22506 | |
0a5429f6 DE |
22507 | map = &psymtab_cu_index_map[i]; |
22508 | map->psymtab = psymtab; | |
22509 | map->cu_index = i; | |
22510 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
22511 | gdb_assert (slot != NULL); | |
22512 | gdb_assert (*slot == NULL); | |
22513 | *slot = map; | |
9291a0cd | 22514 | |
b64f50a1 JK |
22515 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22516 | per_cu->offset.sect_off); | |
9291a0cd | 22517 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 22518 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
22519 | obstack_grow (&cu_list, val, 8); |
22520 | } | |
22521 | ||
0a5429f6 DE |
22522 | /* Dump the address map. */ |
22523 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
22524 | ||
1fd400ff TT |
22525 | /* Write out the .debug_type entries, if any. */ |
22526 | if (dwarf2_per_objfile->signatured_types) | |
22527 | { | |
22528 | struct signatured_type_index_data sig_data; | |
22529 | ||
22530 | sig_data.objfile = objfile; | |
22531 | sig_data.symtab = symtab; | |
22532 | sig_data.types_list = &types_cu_list; | |
987d643c | 22533 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
22534 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
22535 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
22536 | write_one_signatured_type, &sig_data); | |
22537 | } | |
22538 | ||
156942c7 DE |
22539 | /* Now that we've processed all symbols we can shrink their cu_indices |
22540 | lists. */ | |
22541 | uniquify_cu_indices (symtab); | |
22542 | ||
9291a0cd TT |
22543 | obstack_init (&constant_pool); |
22544 | make_cleanup_obstack_free (&constant_pool); | |
22545 | obstack_init (&symtab_obstack); | |
22546 | make_cleanup_obstack_free (&symtab_obstack); | |
22547 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
22548 | ||
22549 | obstack_init (&contents); | |
22550 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 22551 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
22552 | total_len = size_of_contents; |
22553 | ||
22554 | /* The version number. */ | |
796a7ff8 | 22555 | val = MAYBE_SWAP (8); |
9291a0cd TT |
22556 | obstack_grow (&contents, &val, sizeof (val)); |
22557 | ||
22558 | /* The offset of the CU list from the start of the file. */ | |
22559 | val = MAYBE_SWAP (total_len); | |
22560 | obstack_grow (&contents, &val, sizeof (val)); | |
22561 | total_len += obstack_object_size (&cu_list); | |
22562 | ||
1fd400ff TT |
22563 | /* The offset of the types CU list from the start of the file. */ |
22564 | val = MAYBE_SWAP (total_len); | |
22565 | obstack_grow (&contents, &val, sizeof (val)); | |
22566 | total_len += obstack_object_size (&types_cu_list); | |
22567 | ||
9291a0cd TT |
22568 | /* The offset of the address table from the start of the file. */ |
22569 | val = MAYBE_SWAP (total_len); | |
22570 | obstack_grow (&contents, &val, sizeof (val)); | |
22571 | total_len += obstack_object_size (&addr_obstack); | |
22572 | ||
22573 | /* The offset of the symbol table from the start of the file. */ | |
22574 | val = MAYBE_SWAP (total_len); | |
22575 | obstack_grow (&contents, &val, sizeof (val)); | |
22576 | total_len += obstack_object_size (&symtab_obstack); | |
22577 | ||
22578 | /* The offset of the constant pool from the start of the file. */ | |
22579 | val = MAYBE_SWAP (total_len); | |
22580 | obstack_grow (&contents, &val, sizeof (val)); | |
22581 | total_len += obstack_object_size (&constant_pool); | |
22582 | ||
22583 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
22584 | ||
22585 | write_obstack (out_file, &contents); | |
22586 | write_obstack (out_file, &cu_list); | |
1fd400ff | 22587 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
22588 | write_obstack (out_file, &addr_obstack); |
22589 | write_obstack (out_file, &symtab_obstack); | |
22590 | write_obstack (out_file, &constant_pool); | |
22591 | ||
22592 | fclose (out_file); | |
22593 | ||
22594 | /* We want to keep the file, so we set cleanup_filename to NULL | |
22595 | here. See unlink_if_set. */ | |
22596 | cleanup_filename = NULL; | |
22597 | ||
22598 | do_cleanups (cleanup); | |
22599 | } | |
22600 | ||
90476074 TT |
22601 | /* Implementation of the `save gdb-index' command. |
22602 | ||
22603 | Note that the file format used by this command is documented in the | |
22604 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 22605 | |
9291a0cd TT |
22606 | static void |
22607 | save_gdb_index_command (char *arg, int from_tty) | |
22608 | { | |
22609 | struct objfile *objfile; | |
22610 | ||
22611 | if (!arg || !*arg) | |
96d19272 | 22612 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
22613 | |
22614 | ALL_OBJFILES (objfile) | |
22615 | { | |
22616 | struct stat st; | |
22617 | ||
22618 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 22619 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
22620 | continue; |
22621 | ||
22622 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
22623 | if (dwarf2_per_objfile) | |
22624 | { | |
22625 | volatile struct gdb_exception except; | |
22626 | ||
22627 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
22628 | { | |
22629 | write_psymtabs_to_index (objfile, arg); | |
22630 | } | |
22631 | if (except.reason < 0) | |
22632 | exception_fprintf (gdb_stderr, except, | |
22633 | _("Error while writing index for `%s': "), | |
4262abfb | 22634 | objfile_name (objfile)); |
9291a0cd TT |
22635 | } |
22636 | } | |
dce234bc PP |
22637 | } |
22638 | ||
9291a0cd TT |
22639 | \f |
22640 | ||
9eae7c52 TT |
22641 | int dwarf2_always_disassemble; |
22642 | ||
22643 | static void | |
22644 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
22645 | struct cmd_list_element *c, const char *value) | |
22646 | { | |
3e43a32a MS |
22647 | fprintf_filtered (file, |
22648 | _("Whether to always disassemble " | |
22649 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
22650 | value); |
22651 | } | |
22652 | ||
900e11f9 JK |
22653 | static void |
22654 | show_check_physname (struct ui_file *file, int from_tty, | |
22655 | struct cmd_list_element *c, const char *value) | |
22656 | { | |
22657 | fprintf_filtered (file, | |
22658 | _("Whether to check \"physname\" is %s.\n"), | |
22659 | value); | |
22660 | } | |
22661 | ||
6502dd73 DJ |
22662 | void _initialize_dwarf2_read (void); |
22663 | ||
22664 | void | |
22665 | _initialize_dwarf2_read (void) | |
22666 | { | |
96d19272 JK |
22667 | struct cmd_list_element *c; |
22668 | ||
dce234bc | 22669 | dwarf2_objfile_data_key |
c1bd65d0 | 22670 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 22671 | |
1bedd215 AC |
22672 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
22673 | Set DWARF 2 specific variables.\n\ | |
22674 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
22675 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
22676 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
22677 | ||
1bedd215 AC |
22678 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
22679 | Show DWARF 2 specific variables\n\ | |
22680 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
22681 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
22682 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
22683 | ||
22684 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
22685 | &dwarf2_max_cache_age, _("\ |
22686 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
22687 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
22688 | A higher limit means that cached compilation units will be stored\n\ | |
22689 | in memory longer, and more total memory will be used. Zero disables\n\ | |
22690 | caching, which can slow down startup."), | |
2c5b56ce | 22691 | NULL, |
920d2a44 | 22692 | show_dwarf2_max_cache_age, |
2c5b56ce | 22693 | &set_dwarf2_cmdlist, |
ae038cb0 | 22694 | &show_dwarf2_cmdlist); |
d97bc12b | 22695 | |
9eae7c52 TT |
22696 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
22697 | &dwarf2_always_disassemble, _("\ | |
22698 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
22699 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
22700 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
22701 | syntax. When disabled, expressions will be printed in a more\n\ | |
22702 | conversational style, when possible."), | |
22703 | NULL, | |
22704 | show_dwarf2_always_disassemble, | |
22705 | &set_dwarf2_cmdlist, | |
22706 | &show_dwarf2_cmdlist); | |
22707 | ||
73be47f5 | 22708 | add_setshow_zuinteger_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
45cfd468 DE |
22709 | Set debugging of the dwarf2 reader."), _("\ |
22710 | Show debugging of the dwarf2 reader."), _("\ | |
73be47f5 DE |
22711 | When enabled (non-zero), debugging messages are printed during dwarf2\n\ |
22712 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
22713 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
22714 | NULL, |
22715 | NULL, | |
22716 | &setdebuglist, &showdebuglist); | |
22717 | ||
ccce17b0 | 22718 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
22719 | Set debugging of the dwarf2 DIE reader."), _("\ |
22720 | Show debugging of the dwarf2 DIE reader."), _("\ | |
22721 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
22722 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
22723 | NULL, |
22724 | NULL, | |
22725 | &setdebuglist, &showdebuglist); | |
9291a0cd | 22726 | |
900e11f9 JK |
22727 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
22728 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
22729 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
22730 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
22731 | the demangler."), | |
22732 | NULL, show_check_physname, | |
22733 | &setdebuglist, &showdebuglist); | |
22734 | ||
e615022a DE |
22735 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
22736 | no_class, &use_deprecated_index_sections, _("\ | |
22737 | Set whether to use deprecated gdb_index sections."), _("\ | |
22738 | Show whether to use deprecated gdb_index sections."), _("\ | |
22739 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
22740 | Normally they are ignored either because of a missing feature or\n\ | |
22741 | performance issue.\n\ | |
22742 | Warning: This option must be enabled before gdb reads the file."), | |
22743 | NULL, | |
22744 | NULL, | |
22745 | &setlist, &showlist); | |
22746 | ||
96d19272 | 22747 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 22748 | _("\ |
fc1a9d6e | 22749 | Save a gdb-index file.\n\ |
11570e71 | 22750 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
22751 | &save_cmdlist); |
22752 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
22753 | |
22754 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
22755 | &dwarf2_locexpr_funcs); | |
22756 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
22757 | &dwarf2_loclist_funcs); | |
22758 | ||
22759 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
22760 | &dwarf2_block_frame_base_locexpr_funcs); | |
22761 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
22762 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 22763 | } |