Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
618f726f | 3 | Copyright (C) 1994-2016 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" |
53ce3c39 | 58 | #include <sys/stat.h> |
96d19272 | 59 | #include "completer.h" |
34eaf542 | 60 | #include "vec.h" |
98bfdba5 | 61 | #include "c-lang.h" |
a766d390 | 62 | #include "go-lang.h" |
98bfdba5 | 63 | #include "valprint.h" |
3019eac3 | 64 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 65 | #include "gdb/gdb-index.h" |
60d5a603 | 66 | #include <ctype.h> |
cbb099e8 | 67 | #include "gdb_bfd.h" |
4357ac6c | 68 | #include "f-lang.h" |
05cba821 | 69 | #include "source.h" |
614c279d | 70 | #include "filestuff.h" |
dc294be5 | 71 | #include "build-id.h" |
22cee43f | 72 | #include "namespace.h" |
4c2df51b | 73 | |
c906108c | 74 | #include <fcntl.h> |
c906108c | 75 | #include <sys/types.h> |
d8151005 | 76 | |
34eaf542 TT |
77 | typedef struct symbol *symbolp; |
78 | DEF_VEC_P (symbolp); | |
79 | ||
73be47f5 DE |
80 | /* When == 1, print basic high level tracing messages. |
81 | When > 1, be more verbose. | |
b4f54984 DE |
82 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
83 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 84 | |
d97bc12b | 85 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 86 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 87 | |
27e0867f DE |
88 | /* When non-zero, dump line number entries as they are read in. */ |
89 | static unsigned int dwarf_line_debug = 0; | |
90 | ||
900e11f9 JK |
91 | /* When non-zero, cross-check physname against demangler. */ |
92 | static int check_physname = 0; | |
93 | ||
481860b3 | 94 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 95 | static int use_deprecated_index_sections = 0; |
481860b3 | 96 | |
6502dd73 DJ |
97 | static const struct objfile_data *dwarf2_objfile_data_key; |
98 | ||
f1e6e072 TT |
99 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
100 | ||
101 | static int dwarf2_locexpr_index; | |
102 | static int dwarf2_loclist_index; | |
103 | static int dwarf2_locexpr_block_index; | |
104 | static int dwarf2_loclist_block_index; | |
105 | ||
73869dc2 DE |
106 | /* A descriptor for dwarf sections. |
107 | ||
108 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
109 | scanned. BUFFER, READIN are filled in later when the section is read. | |
110 | If the section contained compressed data then SIZE is updated to record | |
111 | the uncompressed size of the section. | |
112 | ||
113 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
114 | creating the concept of virtual sections contained within a real section. | |
115 | In DWP V2 the sections of the input DWO files are concatenated together | |
116 | into one section, but section offsets are kept relative to the original | |
117 | input section. | |
118 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
119 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
120 | describe the virtual section. */ | |
121 | ||
dce234bc PP |
122 | struct dwarf2_section_info |
123 | { | |
73869dc2 DE |
124 | union |
125 | { | |
e5aa3347 | 126 | /* If this is a real section, the bfd section. */ |
049412e3 | 127 | asection *section; |
73869dc2 | 128 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 129 | section. */ |
73869dc2 DE |
130 | struct dwarf2_section_info *containing_section; |
131 | } s; | |
19ac8c2e | 132 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 133 | const gdb_byte *buffer; |
73869dc2 | 134 | /* The size of the section, real or virtual. */ |
dce234bc | 135 | bfd_size_type size; |
73869dc2 DE |
136 | /* If this is a virtual section, the offset in the real section. |
137 | Only valid if is_virtual. */ | |
138 | bfd_size_type virtual_offset; | |
be391dca | 139 | /* True if we have tried to read this section. */ |
73869dc2 DE |
140 | char readin; |
141 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 142 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 143 | char is_virtual; |
dce234bc PP |
144 | }; |
145 | ||
8b70b953 TT |
146 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
147 | DEF_VEC_O (dwarf2_section_info_def); | |
148 | ||
9291a0cd TT |
149 | /* All offsets in the index are of this type. It must be |
150 | architecture-independent. */ | |
151 | typedef uint32_t offset_type; | |
152 | ||
153 | DEF_VEC_I (offset_type); | |
154 | ||
156942c7 DE |
155 | /* Ensure only legit values are used. */ |
156 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
157 | do { \ | |
158 | gdb_assert ((unsigned int) (value) <= 1); \ | |
159 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
160 | } while (0) | |
161 | ||
162 | /* Ensure only legit values are used. */ | |
163 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
164 | do { \ | |
165 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
166 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
167 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
168 | } while (0) | |
169 | ||
170 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
171 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
172 | do { \ | |
173 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
174 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
175 | } while (0) | |
176 | ||
9291a0cd TT |
177 | /* A description of the mapped index. The file format is described in |
178 | a comment by the code that writes the index. */ | |
179 | struct mapped_index | |
180 | { | |
559a7a62 JK |
181 | /* Index data format version. */ |
182 | int version; | |
183 | ||
9291a0cd TT |
184 | /* The total length of the buffer. */ |
185 | off_t total_size; | |
b11b1f88 | 186 | |
9291a0cd TT |
187 | /* A pointer to the address table data. */ |
188 | const gdb_byte *address_table; | |
b11b1f88 | 189 | |
9291a0cd TT |
190 | /* Size of the address table data in bytes. */ |
191 | offset_type address_table_size; | |
b11b1f88 | 192 | |
3876f04e DE |
193 | /* The symbol table, implemented as a hash table. */ |
194 | const offset_type *symbol_table; | |
b11b1f88 | 195 | |
9291a0cd | 196 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 197 | offset_type symbol_table_slots; |
b11b1f88 | 198 | |
9291a0cd TT |
199 | /* A pointer to the constant pool. */ |
200 | const char *constant_pool; | |
201 | }; | |
202 | ||
95554aad TT |
203 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
204 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
205 | ||
52059ffd TT |
206 | struct tu_stats |
207 | { | |
208 | int nr_uniq_abbrev_tables; | |
209 | int nr_symtabs; | |
210 | int nr_symtab_sharers; | |
211 | int nr_stmt_less_type_units; | |
212 | int nr_all_type_units_reallocs; | |
213 | }; | |
214 | ||
9cdd5dbd DE |
215 | /* Collection of data recorded per objfile. |
216 | This hangs off of dwarf2_objfile_data_key. */ | |
217 | ||
6502dd73 DJ |
218 | struct dwarf2_per_objfile |
219 | { | |
dce234bc PP |
220 | struct dwarf2_section_info info; |
221 | struct dwarf2_section_info abbrev; | |
222 | struct dwarf2_section_info line; | |
dce234bc PP |
223 | struct dwarf2_section_info loc; |
224 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 225 | struct dwarf2_section_info macro; |
dce234bc PP |
226 | struct dwarf2_section_info str; |
227 | struct dwarf2_section_info ranges; | |
3019eac3 | 228 | struct dwarf2_section_info addr; |
dce234bc PP |
229 | struct dwarf2_section_info frame; |
230 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 231 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 232 | |
8b70b953 TT |
233 | VEC (dwarf2_section_info_def) *types; |
234 | ||
be391dca TT |
235 | /* Back link. */ |
236 | struct objfile *objfile; | |
237 | ||
d467dd73 | 238 | /* Table of all the compilation units. This is used to locate |
10b3939b | 239 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
240 | struct dwarf2_per_cu_data **all_comp_units; |
241 | ||
242 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
243 | int n_comp_units; | |
244 | ||
1fd400ff | 245 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 246 | int n_type_units; |
1fd400ff | 247 | |
6aa5f3a6 DE |
248 | /* The number of elements allocated in all_type_units. |
249 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
250 | int n_allocated_type_units; | |
251 | ||
a2ce51a0 DE |
252 | /* The .debug_types-related CUs (TUs). |
253 | This is stored in malloc space because we may realloc it. */ | |
b4dd5633 | 254 | struct signatured_type **all_type_units; |
1fd400ff | 255 | |
f4dc4d17 DE |
256 | /* Table of struct type_unit_group objects. |
257 | The hash key is the DW_AT_stmt_list value. */ | |
258 | htab_t type_unit_groups; | |
72dca2f5 | 259 | |
348e048f DE |
260 | /* A table mapping .debug_types signatures to its signatured_type entry. |
261 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
262 | htab_t signatured_types; | |
263 | ||
f4dc4d17 DE |
264 | /* Type unit statistics, to see how well the scaling improvements |
265 | are doing. */ | |
52059ffd | 266 | struct tu_stats tu_stats; |
f4dc4d17 DE |
267 | |
268 | /* A chain of compilation units that are currently read in, so that | |
269 | they can be freed later. */ | |
270 | struct dwarf2_per_cu_data *read_in_chain; | |
271 | ||
3019eac3 DE |
272 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
273 | This is NULL if the table hasn't been allocated yet. */ | |
274 | htab_t dwo_files; | |
275 | ||
80626a55 DE |
276 | /* Non-zero if we've check for whether there is a DWP file. */ |
277 | int dwp_checked; | |
278 | ||
279 | /* The DWP file if there is one, or NULL. */ | |
280 | struct dwp_file *dwp_file; | |
281 | ||
36586728 TT |
282 | /* The shared '.dwz' file, if one exists. This is used when the |
283 | original data was compressed using 'dwz -m'. */ | |
284 | struct dwz_file *dwz_file; | |
285 | ||
72dca2f5 FR |
286 | /* A flag indicating wether this objfile has a section loaded at a |
287 | VMA of 0. */ | |
288 | int has_section_at_zero; | |
9291a0cd | 289 | |
ae2de4f8 DE |
290 | /* True if we are using the mapped index, |
291 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
292 | unsigned char using_index; |
293 | ||
ae2de4f8 | 294 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 295 | struct mapped_index *index_table; |
98bfdba5 | 296 | |
7b9f3c50 | 297 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
298 | TUs typically share line table entries with a CU, so we maintain a |
299 | separate table of all line table entries to support the sharing. | |
300 | Note that while there can be way more TUs than CUs, we've already | |
301 | sorted all the TUs into "type unit groups", grouped by their | |
302 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
303 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
304 | htab_t quick_file_names_table; |
305 | ||
98bfdba5 PA |
306 | /* Set during partial symbol reading, to prevent queueing of full |
307 | symbols. */ | |
308 | int reading_partial_symbols; | |
673bfd45 | 309 | |
dee91e82 | 310 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 311 | This is NULL if not allocated yet. |
02142a6c | 312 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 313 | htab_t die_type_hash; |
95554aad TT |
314 | |
315 | /* The CUs we recently read. */ | |
316 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
527f3840 JK |
317 | |
318 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
319 | htab_t line_header_hash; | |
6502dd73 DJ |
320 | }; |
321 | ||
322 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 323 | |
251d32d9 | 324 | /* Default names of the debugging sections. */ |
c906108c | 325 | |
233a11ab CS |
326 | /* Note that if the debugging section has been compressed, it might |
327 | have a name like .zdebug_info. */ | |
328 | ||
9cdd5dbd DE |
329 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
330 | { | |
251d32d9 TG |
331 | { ".debug_info", ".zdebug_info" }, |
332 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
333 | { ".debug_line", ".zdebug_line" }, | |
334 | { ".debug_loc", ".zdebug_loc" }, | |
335 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 336 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
337 | { ".debug_str", ".zdebug_str" }, |
338 | { ".debug_ranges", ".zdebug_ranges" }, | |
339 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 340 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
341 | { ".debug_frame", ".zdebug_frame" }, |
342 | { ".eh_frame", NULL }, | |
24d3216f TT |
343 | { ".gdb_index", ".zgdb_index" }, |
344 | 23 | |
251d32d9 | 345 | }; |
c906108c | 346 | |
80626a55 | 347 | /* List of DWO/DWP sections. */ |
3019eac3 | 348 | |
80626a55 | 349 | static const struct dwop_section_names |
3019eac3 DE |
350 | { |
351 | struct dwarf2_section_names abbrev_dwo; | |
352 | struct dwarf2_section_names info_dwo; | |
353 | struct dwarf2_section_names line_dwo; | |
354 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
355 | struct dwarf2_section_names macinfo_dwo; |
356 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
357 | struct dwarf2_section_names str_dwo; |
358 | struct dwarf2_section_names str_offsets_dwo; | |
359 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
360 | struct dwarf2_section_names cu_index; |
361 | struct dwarf2_section_names tu_index; | |
3019eac3 | 362 | } |
80626a55 | 363 | dwop_section_names = |
3019eac3 DE |
364 | { |
365 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
366 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
367 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
368 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
369 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
370 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
371 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
372 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
373 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
374 | { ".debug_cu_index", ".zdebug_cu_index" }, |
375 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
376 | }; |
377 | ||
c906108c SS |
378 | /* local data types */ |
379 | ||
107d2387 AC |
380 | /* The data in a compilation unit header, after target2host |
381 | translation, looks like this. */ | |
c906108c | 382 | struct comp_unit_head |
a738430d | 383 | { |
c764a876 | 384 | unsigned int length; |
a738430d | 385 | short version; |
a738430d MK |
386 | unsigned char addr_size; |
387 | unsigned char signed_addr_p; | |
b64f50a1 | 388 | sect_offset abbrev_offset; |
57349743 | 389 | |
a738430d MK |
390 | /* Size of file offsets; either 4 or 8. */ |
391 | unsigned int offset_size; | |
57349743 | 392 | |
a738430d MK |
393 | /* Size of the length field; either 4 or 12. */ |
394 | unsigned int initial_length_size; | |
57349743 | 395 | |
a738430d MK |
396 | /* Offset to the first byte of this compilation unit header in the |
397 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 398 | sect_offset offset; |
57349743 | 399 | |
d00adf39 DE |
400 | /* Offset to first die in this cu from the start of the cu. |
401 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 402 | cu_offset first_die_offset; |
a738430d | 403 | }; |
c906108c | 404 | |
3da10d80 KS |
405 | /* Type used for delaying computation of method physnames. |
406 | See comments for compute_delayed_physnames. */ | |
407 | struct delayed_method_info | |
408 | { | |
409 | /* The type to which the method is attached, i.e., its parent class. */ | |
410 | struct type *type; | |
411 | ||
412 | /* The index of the method in the type's function fieldlists. */ | |
413 | int fnfield_index; | |
414 | ||
415 | /* The index of the method in the fieldlist. */ | |
416 | int index; | |
417 | ||
418 | /* The name of the DIE. */ | |
419 | const char *name; | |
420 | ||
421 | /* The DIE associated with this method. */ | |
422 | struct die_info *die; | |
423 | }; | |
424 | ||
425 | typedef struct delayed_method_info delayed_method_info; | |
426 | DEF_VEC_O (delayed_method_info); | |
427 | ||
e7c27a73 DJ |
428 | /* Internal state when decoding a particular compilation unit. */ |
429 | struct dwarf2_cu | |
430 | { | |
431 | /* The objfile containing this compilation unit. */ | |
432 | struct objfile *objfile; | |
433 | ||
d00adf39 | 434 | /* The header of the compilation unit. */ |
e7c27a73 | 435 | struct comp_unit_head header; |
e142c38c | 436 | |
d00adf39 DE |
437 | /* Base address of this compilation unit. */ |
438 | CORE_ADDR base_address; | |
439 | ||
440 | /* Non-zero if base_address has been set. */ | |
441 | int base_known; | |
442 | ||
e142c38c DJ |
443 | /* The language we are debugging. */ |
444 | enum language language; | |
445 | const struct language_defn *language_defn; | |
446 | ||
b0f35d58 DL |
447 | const char *producer; |
448 | ||
e142c38c DJ |
449 | /* The generic symbol table building routines have separate lists for |
450 | file scope symbols and all all other scopes (local scopes). So | |
451 | we need to select the right one to pass to add_symbol_to_list(). | |
452 | We do it by keeping a pointer to the correct list in list_in_scope. | |
453 | ||
454 | FIXME: The original dwarf code just treated the file scope as the | |
455 | first local scope, and all other local scopes as nested local | |
456 | scopes, and worked fine. Check to see if we really need to | |
457 | distinguish these in buildsym.c. */ | |
458 | struct pending **list_in_scope; | |
459 | ||
433df2d4 DE |
460 | /* The abbrev table for this CU. |
461 | Normally this points to the abbrev table in the objfile. | |
462 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
463 | struct abbrev_table *abbrev_table; | |
72bf9492 | 464 | |
b64f50a1 JK |
465 | /* Hash table holding all the loaded partial DIEs |
466 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
467 | htab_t partial_dies; |
468 | ||
469 | /* Storage for things with the same lifetime as this read-in compilation | |
470 | unit, including partial DIEs. */ | |
471 | struct obstack comp_unit_obstack; | |
472 | ||
ae038cb0 DJ |
473 | /* When multiple dwarf2_cu structures are living in memory, this field |
474 | chains them all together, so that they can be released efficiently. | |
475 | We will probably also want a generation counter so that most-recently-used | |
476 | compilation units are cached... */ | |
477 | struct dwarf2_per_cu_data *read_in_chain; | |
478 | ||
69d751e3 | 479 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
480 | struct dwarf2_per_cu_data *per_cu; |
481 | ||
482 | /* How many compilation units ago was this CU last referenced? */ | |
483 | int last_used; | |
484 | ||
b64f50a1 JK |
485 | /* A hash table of DIE cu_offset for following references with |
486 | die_info->offset.sect_off as hash. */ | |
51545339 | 487 | htab_t die_hash; |
10b3939b DJ |
488 | |
489 | /* Full DIEs if read in. */ | |
490 | struct die_info *dies; | |
491 | ||
492 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
493 | units referenced by this one. Only set during full symbol processing; | |
494 | partial symbol tables do not have dependencies. */ | |
495 | htab_t dependencies; | |
496 | ||
cb1df416 DJ |
497 | /* Header data from the line table, during full symbol processing. */ |
498 | struct line_header *line_header; | |
499 | ||
3da10d80 KS |
500 | /* A list of methods which need to have physnames computed |
501 | after all type information has been read. */ | |
502 | VEC (delayed_method_info) *method_list; | |
503 | ||
96408a79 SA |
504 | /* To be copied to symtab->call_site_htab. */ |
505 | htab_t call_site_htab; | |
506 | ||
034e5797 DE |
507 | /* Non-NULL if this CU came from a DWO file. |
508 | There is an invariant here that is important to remember: | |
509 | Except for attributes copied from the top level DIE in the "main" | |
510 | (or "stub") file in preparation for reading the DWO file | |
511 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
512 | Either there isn't a DWO file (in which case this is NULL and the point | |
513 | is moot), or there is and either we're not going to read it (in which | |
514 | case this is NULL) or there is and we are reading it (in which case this | |
515 | is non-NULL). */ | |
3019eac3 DE |
516 | struct dwo_unit *dwo_unit; |
517 | ||
518 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
519 | (zero is a valid value though). | |
1dbab08b | 520 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
521 | ULONGEST addr_base; |
522 | ||
2e3cf129 DE |
523 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
524 | (zero is a valid value though). | |
1dbab08b | 525 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 526 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
527 | be used without needing to know whether DWO files are in use or not. |
528 | N.B. This does not apply to DW_AT_ranges appearing in | |
529 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
530 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
531 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
532 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
533 | ULONGEST ranges_base; |
534 | ||
ae038cb0 DJ |
535 | /* Mark used when releasing cached dies. */ |
536 | unsigned int mark : 1; | |
537 | ||
8be455d7 JK |
538 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
539 | This test is imperfect as there may exist optimized debug code not using | |
540 | any location list and still facing inlining issues if handled as | |
541 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 542 | unsigned int has_loclist : 1; |
ba919b58 | 543 | |
1b80a9fa JK |
544 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
545 | if all the producer_is_* fields are valid. This information is cached | |
546 | because profiling CU expansion showed excessive time spent in | |
547 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
548 | unsigned int checked_producer : 1; |
549 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 550 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 551 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
552 | |
553 | /* When set, the file that we're processing is known to have | |
554 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
555 | this information, but later versions do. */ | |
556 | ||
557 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
558 | }; |
559 | ||
10b3939b DJ |
560 | /* Persistent data held for a compilation unit, even when not |
561 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 562 | read_symtab_private field of the psymtab. */ |
10b3939b | 563 | |
ae038cb0 DJ |
564 | struct dwarf2_per_cu_data |
565 | { | |
36586728 | 566 | /* The start offset and length of this compilation unit. |
45452591 | 567 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
568 | initial_length_size. |
569 | If the DIE refers to a DWO file, this is always of the original die, | |
570 | not the DWO file. */ | |
b64f50a1 | 571 | sect_offset offset; |
36586728 | 572 | unsigned int length; |
ae038cb0 DJ |
573 | |
574 | /* Flag indicating this compilation unit will be read in before | |
575 | any of the current compilation units are processed. */ | |
c764a876 | 576 | unsigned int queued : 1; |
ae038cb0 | 577 | |
0d99eb77 DE |
578 | /* This flag will be set when reading partial DIEs if we need to load |
579 | absolutely all DIEs for this compilation unit, instead of just the ones | |
580 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
581 | hash table and don't find it. */ |
582 | unsigned int load_all_dies : 1; | |
583 | ||
0186c6a7 DE |
584 | /* Non-zero if this CU is from .debug_types. |
585 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
586 | this is non-zero. */ | |
3019eac3 DE |
587 | unsigned int is_debug_types : 1; |
588 | ||
36586728 TT |
589 | /* Non-zero if this CU is from the .dwz file. */ |
590 | unsigned int is_dwz : 1; | |
591 | ||
a2ce51a0 DE |
592 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
593 | This flag is only valid if is_debug_types is true. | |
594 | We can't read a CU directly from a DWO file: There are required | |
595 | attributes in the stub. */ | |
596 | unsigned int reading_dwo_directly : 1; | |
597 | ||
7ee85ab1 DE |
598 | /* Non-zero if the TU has been read. |
599 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
600 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
601 | fetching them from random other DWOs (due to comdat folding). | |
602 | If the TU has already been read, the optimization is unnecessary | |
603 | (and unwise - we don't want to change where gdb thinks the TU lives | |
604 | "midflight"). | |
605 | This flag is only valid if is_debug_types is true. */ | |
606 | unsigned int tu_read : 1; | |
607 | ||
3019eac3 DE |
608 | /* The section this CU/TU lives in. |
609 | If the DIE refers to a DWO file, this is always the original die, | |
610 | not the DWO file. */ | |
8a0459fd | 611 | struct dwarf2_section_info *section; |
348e048f | 612 | |
17ea53c3 | 613 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
614 | of the CU cache it gets reset to NULL again. This is left as NULL for |
615 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 616 | struct dwarf2_cu *cu; |
1c379e20 | 617 | |
9cdd5dbd DE |
618 | /* The corresponding objfile. |
619 | Normally we can get the objfile from dwarf2_per_objfile. | |
620 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
621 | struct objfile *objfile; |
622 | ||
fffbe6a8 YQ |
623 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
624 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
625 | union |
626 | { | |
627 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 628 | or NULL for unread partial units. */ |
9291a0cd TT |
629 | struct partial_symtab *psymtab; |
630 | ||
631 | /* Data needed by the "quick" functions. */ | |
632 | struct dwarf2_per_cu_quick_data *quick; | |
633 | } v; | |
95554aad | 634 | |
796a7ff8 DE |
635 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
636 | while reading psymtabs, used to compute the psymtab dependencies, | |
637 | and then cleared. Then it is filled in again while reading full | |
638 | symbols, and only deleted when the objfile is destroyed. | |
639 | ||
640 | This is also used to work around a difference between the way gold | |
641 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
642 | is a gold bug. For symbols coming from TUs, gold records in the index | |
643 | the CU that includes the TU instead of the TU itself. This breaks | |
644 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
645 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
646 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
647 | we need to look in TU Z to find X. Fortunately, this is akin to | |
648 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
649 | .gdb_index version <=7 this also records the TUs that the CU referred | |
650 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
651 | indices so we only pay a price for gold generated indices. |
652 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 653 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
654 | }; |
655 | ||
348e048f DE |
656 | /* Entry in the signatured_types hash table. */ |
657 | ||
658 | struct signatured_type | |
659 | { | |
42e7ad6c | 660 | /* The "per_cu" object of this type. |
ac9ec31b | 661 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
662 | N.B.: This is the first member so that it's easy to convert pointers |
663 | between them. */ | |
664 | struct dwarf2_per_cu_data per_cu; | |
665 | ||
3019eac3 | 666 | /* The type's signature. */ |
348e048f DE |
667 | ULONGEST signature; |
668 | ||
3019eac3 | 669 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
670 | If this TU is a DWO stub and the definition lives in a DWO file |
671 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
672 | cu_offset type_offset_in_tu; |
673 | ||
674 | /* Offset in the section of the type's DIE. | |
675 | If the definition lives in a DWO file, this is the offset in the | |
676 | .debug_types.dwo section. | |
677 | The value is zero until the actual value is known. | |
678 | Zero is otherwise not a valid section offset. */ | |
679 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
680 | |
681 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
682 | can share them. This points to the containing symtab. */ | |
683 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
684 | |
685 | /* The type. | |
686 | The first time we encounter this type we fully read it in and install it | |
687 | in the symbol tables. Subsequent times we only need the type. */ | |
688 | struct type *type; | |
a2ce51a0 DE |
689 | |
690 | /* Containing DWO unit. | |
691 | This field is valid iff per_cu.reading_dwo_directly. */ | |
692 | struct dwo_unit *dwo_unit; | |
348e048f DE |
693 | }; |
694 | ||
0186c6a7 DE |
695 | typedef struct signatured_type *sig_type_ptr; |
696 | DEF_VEC_P (sig_type_ptr); | |
697 | ||
094b34ac DE |
698 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
699 | This includes type_unit_group and quick_file_names. */ | |
700 | ||
701 | struct stmt_list_hash | |
702 | { | |
703 | /* The DWO unit this table is from or NULL if there is none. */ | |
704 | struct dwo_unit *dwo_unit; | |
705 | ||
706 | /* Offset in .debug_line or .debug_line.dwo. */ | |
707 | sect_offset line_offset; | |
708 | }; | |
709 | ||
f4dc4d17 DE |
710 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
711 | an object of this type. */ | |
712 | ||
713 | struct type_unit_group | |
714 | { | |
0186c6a7 | 715 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
716 | To simplify things we create an artificial CU that "includes" all the |
717 | type units using this stmt_list so that the rest of the code still has | |
718 | a "per_cu" handle on the symtab. | |
719 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 720 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
721 | struct dwarf2_per_cu_data per_cu; |
722 | ||
0186c6a7 DE |
723 | /* The TUs that share this DW_AT_stmt_list entry. |
724 | This is added to while parsing type units to build partial symtabs, | |
725 | and is deleted afterwards and not used again. */ | |
726 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 727 | |
43f3e411 | 728 | /* The compunit symtab. |
094b34ac | 729 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
730 | so we create an essentially anonymous symtab as the compunit symtab. */ |
731 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 732 | |
094b34ac DE |
733 | /* The data used to construct the hash key. */ |
734 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
735 | |
736 | /* The number of symtabs from the line header. | |
737 | The value here must match line_header.num_file_names. */ | |
738 | unsigned int num_symtabs; | |
739 | ||
740 | /* The symbol tables for this TU (obtained from the files listed in | |
741 | DW_AT_stmt_list). | |
742 | WARNING: The order of entries here must match the order of entries | |
743 | in the line header. After the first TU using this type_unit_group, the | |
744 | line header for the subsequent TUs is recreated from this. This is done | |
745 | because we need to use the same symtabs for each TU using the same | |
746 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
747 | there's no guarantee the line header doesn't have duplicate entries. */ | |
748 | struct symtab **symtabs; | |
749 | }; | |
750 | ||
73869dc2 | 751 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
752 | |
753 | struct dwo_sections | |
754 | { | |
755 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
756 | struct dwarf2_section_info line; |
757 | struct dwarf2_section_info loc; | |
09262596 DE |
758 | struct dwarf2_section_info macinfo; |
759 | struct dwarf2_section_info macro; | |
3019eac3 DE |
760 | struct dwarf2_section_info str; |
761 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
762 | /* In the case of a virtual DWO file, these two are unused. */ |
763 | struct dwarf2_section_info info; | |
3019eac3 DE |
764 | VEC (dwarf2_section_info_def) *types; |
765 | }; | |
766 | ||
c88ee1f0 | 767 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
768 | |
769 | struct dwo_unit | |
770 | { | |
771 | /* Backlink to the containing struct dwo_file. */ | |
772 | struct dwo_file *dwo_file; | |
773 | ||
774 | /* The "id" that distinguishes this CU/TU. | |
775 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
776 | Since signatures came first, we stick with it for consistency. */ | |
777 | ULONGEST signature; | |
778 | ||
779 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 780 | struct dwarf2_section_info *section; |
3019eac3 | 781 | |
19ac8c2e | 782 | /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */ |
3019eac3 DE |
783 | sect_offset offset; |
784 | unsigned int length; | |
785 | ||
786 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
787 | cu_offset type_offset_in_tu; | |
788 | }; | |
789 | ||
73869dc2 DE |
790 | /* include/dwarf2.h defines the DWP section codes. |
791 | It defines a max value but it doesn't define a min value, which we | |
792 | use for error checking, so provide one. */ | |
793 | ||
794 | enum dwp_v2_section_ids | |
795 | { | |
796 | DW_SECT_MIN = 1 | |
797 | }; | |
798 | ||
80626a55 | 799 | /* Data for one DWO file. |
57d63ce2 DE |
800 | |
801 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
802 | appears in a DWP file). DWP files don't really have DWO files per se - | |
803 | comdat folding of types "loses" the DWO file they came from, and from | |
804 | a high level view DWP files appear to contain a mass of random types. | |
805 | However, to maintain consistency with the non-DWP case we pretend DWP | |
806 | files contain virtual DWO files, and we assign each TU with one virtual | |
807 | DWO file (generally based on the line and abbrev section offsets - | |
808 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
809 | |
810 | struct dwo_file | |
811 | { | |
0ac5b59e | 812 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
813 | For virtual DWO files the name is constructed from the section offsets |
814 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
815 | from related CU+TUs. */ | |
0ac5b59e DE |
816 | const char *dwo_name; |
817 | ||
818 | /* The DW_AT_comp_dir attribute. */ | |
819 | const char *comp_dir; | |
3019eac3 | 820 | |
80626a55 DE |
821 | /* The bfd, when the file is open. Otherwise this is NULL. |
822 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
823 | bfd *dbfd; | |
3019eac3 | 824 | |
73869dc2 DE |
825 | /* The sections that make up this DWO file. |
826 | Remember that for virtual DWO files in DWP V2, these are virtual | |
827 | sections (for lack of a better name). */ | |
3019eac3 DE |
828 | struct dwo_sections sections; |
829 | ||
19c3d4c9 DE |
830 | /* The CU in the file. |
831 | We only support one because having more than one requires hacking the | |
832 | dwo_name of each to match, which is highly unlikely to happen. | |
833 | Doing this means all TUs can share comp_dir: We also assume that | |
834 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
835 | struct dwo_unit *cu; | |
3019eac3 DE |
836 | |
837 | /* Table of TUs in the file. | |
838 | Each element is a struct dwo_unit. */ | |
839 | htab_t tus; | |
840 | }; | |
841 | ||
80626a55 DE |
842 | /* These sections are what may appear in a DWP file. */ |
843 | ||
844 | struct dwp_sections | |
845 | { | |
73869dc2 | 846 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
847 | struct dwarf2_section_info str; |
848 | struct dwarf2_section_info cu_index; | |
849 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
850 | |
851 | /* These are only used by DWP version 2 files. | |
852 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
853 | sections are referenced by section number, and are not recorded here. | |
854 | In DWP version 2 there is at most one copy of all these sections, each | |
855 | section being (effectively) comprised of the concatenation of all of the | |
856 | individual sections that exist in the version 1 format. | |
857 | To keep the code simple we treat each of these concatenated pieces as a | |
858 | section itself (a virtual section?). */ | |
859 | struct dwarf2_section_info abbrev; | |
860 | struct dwarf2_section_info info; | |
861 | struct dwarf2_section_info line; | |
862 | struct dwarf2_section_info loc; | |
863 | struct dwarf2_section_info macinfo; | |
864 | struct dwarf2_section_info macro; | |
865 | struct dwarf2_section_info str_offsets; | |
866 | struct dwarf2_section_info types; | |
80626a55 DE |
867 | }; |
868 | ||
73869dc2 DE |
869 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
870 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 871 | |
73869dc2 | 872 | struct virtual_v1_dwo_sections |
80626a55 DE |
873 | { |
874 | struct dwarf2_section_info abbrev; | |
875 | struct dwarf2_section_info line; | |
876 | struct dwarf2_section_info loc; | |
877 | struct dwarf2_section_info macinfo; | |
878 | struct dwarf2_section_info macro; | |
879 | struct dwarf2_section_info str_offsets; | |
880 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 881 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
882 | struct dwarf2_section_info info_or_types; |
883 | }; | |
884 | ||
73869dc2 DE |
885 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
886 | In version 2, the sections of the DWO files are concatenated together | |
887 | and stored in one section of that name. Thus each ELF section contains | |
888 | several "virtual" sections. */ | |
889 | ||
890 | struct virtual_v2_dwo_sections | |
891 | { | |
892 | bfd_size_type abbrev_offset; | |
893 | bfd_size_type abbrev_size; | |
894 | ||
895 | bfd_size_type line_offset; | |
896 | bfd_size_type line_size; | |
897 | ||
898 | bfd_size_type loc_offset; | |
899 | bfd_size_type loc_size; | |
900 | ||
901 | bfd_size_type macinfo_offset; | |
902 | bfd_size_type macinfo_size; | |
903 | ||
904 | bfd_size_type macro_offset; | |
905 | bfd_size_type macro_size; | |
906 | ||
907 | bfd_size_type str_offsets_offset; | |
908 | bfd_size_type str_offsets_size; | |
909 | ||
910 | /* Each DWP hash table entry records one CU or one TU. | |
911 | That is recorded here, and copied to dwo_unit.section. */ | |
912 | bfd_size_type info_or_types_offset; | |
913 | bfd_size_type info_or_types_size; | |
914 | }; | |
915 | ||
80626a55 DE |
916 | /* Contents of DWP hash tables. */ |
917 | ||
918 | struct dwp_hash_table | |
919 | { | |
73869dc2 | 920 | uint32_t version, nr_columns; |
80626a55 | 921 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
922 | const gdb_byte *hash_table, *unit_table; |
923 | union | |
924 | { | |
925 | struct | |
926 | { | |
927 | const gdb_byte *indices; | |
928 | } v1; | |
929 | struct | |
930 | { | |
931 | /* This is indexed by column number and gives the id of the section | |
932 | in that column. */ | |
933 | #define MAX_NR_V2_DWO_SECTIONS \ | |
934 | (1 /* .debug_info or .debug_types */ \ | |
935 | + 1 /* .debug_abbrev */ \ | |
936 | + 1 /* .debug_line */ \ | |
937 | + 1 /* .debug_loc */ \ | |
938 | + 1 /* .debug_str_offsets */ \ | |
939 | + 1 /* .debug_macro or .debug_macinfo */) | |
940 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
941 | const gdb_byte *offsets; | |
942 | const gdb_byte *sizes; | |
943 | } v2; | |
944 | } section_pool; | |
80626a55 DE |
945 | }; |
946 | ||
947 | /* Data for one DWP file. */ | |
948 | ||
949 | struct dwp_file | |
950 | { | |
951 | /* Name of the file. */ | |
952 | const char *name; | |
953 | ||
73869dc2 DE |
954 | /* File format version. */ |
955 | int version; | |
956 | ||
93417882 | 957 | /* The bfd. */ |
80626a55 DE |
958 | bfd *dbfd; |
959 | ||
960 | /* Section info for this file. */ | |
961 | struct dwp_sections sections; | |
962 | ||
57d63ce2 | 963 | /* Table of CUs in the file. */ |
80626a55 DE |
964 | const struct dwp_hash_table *cus; |
965 | ||
966 | /* Table of TUs in the file. */ | |
967 | const struct dwp_hash_table *tus; | |
968 | ||
19ac8c2e DE |
969 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
970 | htab_t loaded_cus; | |
971 | htab_t loaded_tus; | |
80626a55 | 972 | |
73869dc2 DE |
973 | /* Table to map ELF section numbers to their sections. |
974 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
975 | unsigned int num_sections; |
976 | asection **elf_sections; | |
977 | }; | |
978 | ||
36586728 TT |
979 | /* This represents a '.dwz' file. */ |
980 | ||
981 | struct dwz_file | |
982 | { | |
983 | /* A dwz file can only contain a few sections. */ | |
984 | struct dwarf2_section_info abbrev; | |
985 | struct dwarf2_section_info info; | |
986 | struct dwarf2_section_info str; | |
987 | struct dwarf2_section_info line; | |
988 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 989 | struct dwarf2_section_info gdb_index; |
36586728 TT |
990 | |
991 | /* The dwz's BFD. */ | |
992 | bfd *dwz_bfd; | |
993 | }; | |
994 | ||
0963b4bd MS |
995 | /* Struct used to pass misc. parameters to read_die_and_children, et |
996 | al. which are used for both .debug_info and .debug_types dies. | |
997 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 998 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
999 | |
1000 | struct die_reader_specs | |
1001 | { | |
a32a8923 | 1002 | /* The bfd of die_section. */ |
93311388 DE |
1003 | bfd* abfd; |
1004 | ||
1005 | /* The CU of the DIE we are parsing. */ | |
1006 | struct dwarf2_cu *cu; | |
1007 | ||
80626a55 | 1008 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1009 | struct dwo_file *dwo_file; |
1010 | ||
dee91e82 | 1011 | /* The section the die comes from. |
3019eac3 | 1012 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1013 | struct dwarf2_section_info *die_section; |
1014 | ||
1015 | /* die_section->buffer. */ | |
d521ce57 | 1016 | const gdb_byte *buffer; |
f664829e DE |
1017 | |
1018 | /* The end of the buffer. */ | |
1019 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1020 | |
1021 | /* The value of the DW_AT_comp_dir attribute. */ | |
1022 | const char *comp_dir; | |
93311388 DE |
1023 | }; |
1024 | ||
fd820528 | 1025 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1026 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1027 | const gdb_byte *info_ptr, |
dee91e82 DE |
1028 | struct die_info *comp_unit_die, |
1029 | int has_children, | |
1030 | void *data); | |
1031 | ||
52059ffd TT |
1032 | struct file_entry |
1033 | { | |
1034 | const char *name; | |
1035 | unsigned int dir_index; | |
1036 | unsigned int mod_time; | |
1037 | unsigned int length; | |
83769d0b DE |
1038 | /* Non-zero if referenced by the Line Number Program. */ |
1039 | int included_p; | |
1040 | /* The associated symbol table, if any. */ | |
1041 | struct symtab *symtab; | |
52059ffd TT |
1042 | }; |
1043 | ||
debd256d JB |
1044 | /* The line number information for a compilation unit (found in the |
1045 | .debug_line section) begins with a "statement program header", | |
1046 | which contains the following information. */ | |
1047 | struct line_header | |
1048 | { | |
527f3840 JK |
1049 | /* Offset of line number information in .debug_line section. */ |
1050 | sect_offset offset; | |
1051 | ||
1052 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
1053 | unsigned offset_in_dwz : 1; | |
1054 | ||
debd256d JB |
1055 | unsigned int total_length; |
1056 | unsigned short version; | |
1057 | unsigned int header_length; | |
1058 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 1059 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
1060 | unsigned char default_is_stmt; |
1061 | int line_base; | |
1062 | unsigned char line_range; | |
1063 | unsigned char opcode_base; | |
1064 | ||
1065 | /* standard_opcode_lengths[i] is the number of operands for the | |
1066 | standard opcode whose value is i. This means that | |
1067 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1068 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
1069 | unsigned char *standard_opcode_lengths; | |
1070 | ||
1071 | /* The include_directories table. NOTE! These strings are not | |
1072 | allocated with xmalloc; instead, they are pointers into | |
1073 | debug_line_buffer. If you try to free them, `free' will get | |
1074 | indigestion. */ | |
1075 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 1076 | const char **include_dirs; |
debd256d JB |
1077 | |
1078 | /* The file_names table. NOTE! These strings are not allocated | |
1079 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
1080 | Don't try to free them directly. */ | |
1081 | unsigned int num_file_names, file_names_size; | |
52059ffd | 1082 | struct file_entry *file_names; |
debd256d JB |
1083 | |
1084 | /* The start and end of the statement program following this | |
6502dd73 | 1085 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 1086 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 1087 | }; |
c906108c SS |
1088 | |
1089 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 1090 | need this much information. */ |
c906108c SS |
1091 | struct partial_die_info |
1092 | { | |
72bf9492 | 1093 | /* Offset of this DIE. */ |
b64f50a1 | 1094 | sect_offset offset; |
72bf9492 DJ |
1095 | |
1096 | /* DWARF-2 tag for this DIE. */ | |
1097 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1098 | ||
72bf9492 DJ |
1099 | /* Assorted flags describing the data found in this DIE. */ |
1100 | unsigned int has_children : 1; | |
1101 | unsigned int is_external : 1; | |
1102 | unsigned int is_declaration : 1; | |
1103 | unsigned int has_type : 1; | |
1104 | unsigned int has_specification : 1; | |
1105 | unsigned int has_pc_info : 1; | |
481860b3 | 1106 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
1107 | |
1108 | /* Flag set if the SCOPE field of this structure has been | |
1109 | computed. */ | |
1110 | unsigned int scope_set : 1; | |
1111 | ||
fa4028e9 JB |
1112 | /* Flag set if the DIE has a byte_size attribute. */ |
1113 | unsigned int has_byte_size : 1; | |
1114 | ||
ff908ebf AW |
1115 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1116 | unsigned int has_const_value : 1; | |
1117 | ||
98bfdba5 PA |
1118 | /* Flag set if any of the DIE's children are template arguments. */ |
1119 | unsigned int has_template_arguments : 1; | |
1120 | ||
abc72ce4 DE |
1121 | /* Flag set if fixup_partial_die has been called on this die. */ |
1122 | unsigned int fixup_called : 1; | |
1123 | ||
36586728 TT |
1124 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1125 | unsigned int is_dwz : 1; | |
1126 | ||
1127 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1128 | unsigned int spec_is_dwz : 1; | |
1129 | ||
72bf9492 | 1130 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1131 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1132 | const char *name; |
72bf9492 | 1133 | |
abc72ce4 DE |
1134 | /* The linkage name, if present. */ |
1135 | const char *linkage_name; | |
1136 | ||
72bf9492 DJ |
1137 | /* The scope to prepend to our children. This is generally |
1138 | allocated on the comp_unit_obstack, so will disappear | |
1139 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1140 | const char *scope; |
72bf9492 | 1141 | |
95554aad TT |
1142 | /* Some data associated with the partial DIE. The tag determines |
1143 | which field is live. */ | |
1144 | union | |
1145 | { | |
1146 | /* The location description associated with this DIE, if any. */ | |
1147 | struct dwarf_block *locdesc; | |
1148 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1149 | sect_offset offset; | |
1150 | } d; | |
72bf9492 DJ |
1151 | |
1152 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1153 | CORE_ADDR lowpc; |
1154 | CORE_ADDR highpc; | |
72bf9492 | 1155 | |
93311388 | 1156 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1157 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1158 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1159 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1160 | const gdb_byte *sibling; |
72bf9492 DJ |
1161 | |
1162 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1163 | DW_AT_specification (or DW_AT_abstract_origin or | |
1164 | DW_AT_extension). */ | |
b64f50a1 | 1165 | sect_offset spec_offset; |
72bf9492 DJ |
1166 | |
1167 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1168 | if any. */ | |
1169 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1170 | }; |
1171 | ||
0963b4bd | 1172 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1173 | struct abbrev_info |
1174 | { | |
1175 | unsigned int number; /* number identifying abbrev */ | |
1176 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1177 | unsigned short has_children; /* boolean */ |
1178 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1179 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1180 | struct abbrev_info *next; /* next in chain */ | |
1181 | }; | |
1182 | ||
1183 | struct attr_abbrev | |
1184 | { | |
9d25dd43 DE |
1185 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1186 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1187 | }; |
1188 | ||
433df2d4 DE |
1189 | /* Size of abbrev_table.abbrev_hash_table. */ |
1190 | #define ABBREV_HASH_SIZE 121 | |
1191 | ||
1192 | /* Top level data structure to contain an abbreviation table. */ | |
1193 | ||
1194 | struct abbrev_table | |
1195 | { | |
f4dc4d17 DE |
1196 | /* Where the abbrev table came from. |
1197 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1198 | sect_offset offset; |
1199 | ||
1200 | /* Storage for the abbrev table. */ | |
1201 | struct obstack abbrev_obstack; | |
1202 | ||
1203 | /* Hash table of abbrevs. | |
1204 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1205 | It could be statically allocated, but the previous code didn't so we | |
1206 | don't either. */ | |
1207 | struct abbrev_info **abbrevs; | |
1208 | }; | |
1209 | ||
0963b4bd | 1210 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1211 | struct attribute |
1212 | { | |
9d25dd43 | 1213 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1214 | ENUM_BITFIELD(dwarf_form) form : 15; |
1215 | ||
1216 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1217 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1218 | here for better struct attribute alignment. */ | |
1219 | unsigned int string_is_canonical : 1; | |
1220 | ||
b60c80d6 DJ |
1221 | union |
1222 | { | |
15d034d0 | 1223 | const char *str; |
b60c80d6 | 1224 | struct dwarf_block *blk; |
43bbcdc2 PH |
1225 | ULONGEST unsnd; |
1226 | LONGEST snd; | |
b60c80d6 | 1227 | CORE_ADDR addr; |
ac9ec31b | 1228 | ULONGEST signature; |
b60c80d6 DJ |
1229 | } |
1230 | u; | |
1231 | }; | |
1232 | ||
0963b4bd | 1233 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1234 | struct die_info |
1235 | { | |
76815b17 DE |
1236 | /* DWARF-2 tag for this DIE. */ |
1237 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1238 | ||
1239 | /* Number of attributes */ | |
98bfdba5 PA |
1240 | unsigned char num_attrs; |
1241 | ||
1242 | /* True if we're presently building the full type name for the | |
1243 | type derived from this DIE. */ | |
1244 | unsigned char building_fullname : 1; | |
76815b17 | 1245 | |
adde2bff DE |
1246 | /* True if this die is in process. PR 16581. */ |
1247 | unsigned char in_process : 1; | |
1248 | ||
76815b17 DE |
1249 | /* Abbrev number */ |
1250 | unsigned int abbrev; | |
1251 | ||
93311388 | 1252 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1253 | sect_offset offset; |
78ba4af6 JB |
1254 | |
1255 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1256 | points to this die's parent; CHILD points to the first child of | |
1257 | this node; and all the children of a given node are chained | |
4950bc1c | 1258 | together via their SIBLING fields. */ |
639d11d3 DC |
1259 | struct die_info *child; /* Its first child, if any. */ |
1260 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1261 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1262 | |
b60c80d6 DJ |
1263 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1264 | zero, but it's not common and zero-sized arrays are not | |
1265 | sufficiently portable C. */ | |
1266 | struct attribute attrs[1]; | |
c906108c SS |
1267 | }; |
1268 | ||
0963b4bd | 1269 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1270 | |
1271 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1272 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1273 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1274 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1275 | #define DW_SND(attr) ((attr)->u.snd) | |
1276 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1277 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1278 | |
0963b4bd | 1279 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1280 | struct dwarf_block |
1281 | { | |
56eb65bd | 1282 | size_t size; |
1d6edc3c JK |
1283 | |
1284 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1285 | const gdb_byte *data; |
c906108c SS |
1286 | }; |
1287 | ||
c906108c SS |
1288 | #ifndef ATTR_ALLOC_CHUNK |
1289 | #define ATTR_ALLOC_CHUNK 4 | |
1290 | #endif | |
1291 | ||
c906108c SS |
1292 | /* Allocate fields for structs, unions and enums in this size. */ |
1293 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1294 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1295 | #endif | |
1296 | ||
c906108c SS |
1297 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1298 | but this would require a corresponding change in unpack_field_as_long | |
1299 | and friends. */ | |
1300 | static int bits_per_byte = 8; | |
1301 | ||
52059ffd TT |
1302 | struct nextfield |
1303 | { | |
1304 | struct nextfield *next; | |
1305 | int accessibility; | |
1306 | int virtuality; | |
1307 | struct field field; | |
1308 | }; | |
1309 | ||
1310 | struct nextfnfield | |
1311 | { | |
1312 | struct nextfnfield *next; | |
1313 | struct fn_field fnfield; | |
1314 | }; | |
1315 | ||
1316 | struct fnfieldlist | |
1317 | { | |
1318 | const char *name; | |
1319 | int length; | |
1320 | struct nextfnfield *head; | |
1321 | }; | |
1322 | ||
1323 | struct typedef_field_list | |
1324 | { | |
1325 | struct typedef_field field; | |
1326 | struct typedef_field_list *next; | |
1327 | }; | |
1328 | ||
c906108c SS |
1329 | /* The routines that read and process dies for a C struct or C++ class |
1330 | pass lists of data member fields and lists of member function fields | |
1331 | in an instance of a field_info structure, as defined below. */ | |
1332 | struct field_info | |
c5aa993b | 1333 | { |
0963b4bd | 1334 | /* List of data member and baseclasses fields. */ |
52059ffd | 1335 | struct nextfield *fields, *baseclasses; |
c906108c | 1336 | |
7d0ccb61 | 1337 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1338 | int nfields; |
c906108c | 1339 | |
c5aa993b JM |
1340 | /* Number of baseclasses. */ |
1341 | int nbaseclasses; | |
c906108c | 1342 | |
c5aa993b JM |
1343 | /* Set if the accesibility of one of the fields is not public. */ |
1344 | int non_public_fields; | |
c906108c | 1345 | |
c5aa993b JM |
1346 | /* Member function fields array, entries are allocated in the order they |
1347 | are encountered in the object file. */ | |
52059ffd | 1348 | struct nextfnfield *fnfields; |
c906108c | 1349 | |
c5aa993b JM |
1350 | /* Member function fieldlist array, contains name of possibly overloaded |
1351 | member function, number of overloaded member functions and a pointer | |
1352 | to the head of the member function field chain. */ | |
52059ffd | 1353 | struct fnfieldlist *fnfieldlists; |
c906108c | 1354 | |
c5aa993b JM |
1355 | /* Number of entries in the fnfieldlists array. */ |
1356 | int nfnfields; | |
98751a41 JK |
1357 | |
1358 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1359 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1360 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1361 | unsigned typedef_field_list_count; |
c5aa993b | 1362 | }; |
c906108c | 1363 | |
10b3939b DJ |
1364 | /* One item on the queue of compilation units to read in full symbols |
1365 | for. */ | |
1366 | struct dwarf2_queue_item | |
1367 | { | |
1368 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1369 | enum language pretend_language; |
10b3939b DJ |
1370 | struct dwarf2_queue_item *next; |
1371 | }; | |
1372 | ||
1373 | /* The current queue. */ | |
1374 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1375 | ||
ae038cb0 DJ |
1376 | /* Loaded secondary compilation units are kept in memory until they |
1377 | have not been referenced for the processing of this many | |
1378 | compilation units. Set this to zero to disable caching. Cache | |
1379 | sizes of up to at least twenty will improve startup time for | |
1380 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1381 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1382 | static void |
b4f54984 DE |
1383 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1384 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1385 | { |
3e43a32a | 1386 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1387 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1388 | value); |
1389 | } | |
4390d890 | 1390 | \f |
c906108c SS |
1391 | /* local function prototypes */ |
1392 | ||
a32a8923 DE |
1393 | static const char *get_section_name (const struct dwarf2_section_info *); |
1394 | ||
1395 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1396 | ||
4efb68b1 | 1397 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1398 | |
918dd910 JK |
1399 | static void dwarf2_find_base_address (struct die_info *die, |
1400 | struct dwarf2_cu *cu); | |
1401 | ||
0018ea6f DE |
1402 | static struct partial_symtab *create_partial_symtab |
1403 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1404 | ||
c67a9c90 | 1405 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1406 | |
72bf9492 DJ |
1407 | static void scan_partial_symbols (struct partial_die_info *, |
1408 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1409 | int, struct dwarf2_cu *); |
c906108c | 1410 | |
72bf9492 DJ |
1411 | static void add_partial_symbol (struct partial_die_info *, |
1412 | struct dwarf2_cu *); | |
63d06c5c | 1413 | |
72bf9492 DJ |
1414 | static void add_partial_namespace (struct partial_die_info *pdi, |
1415 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1416 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1417 | |
5d7cb8df | 1418 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1419 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1420 | struct dwarf2_cu *cu); |
1421 | ||
72bf9492 DJ |
1422 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1423 | struct dwarf2_cu *cu); | |
91c24f0a | 1424 | |
bc30ff58 JB |
1425 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1426 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1427 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1428 | |
257e7a09 YQ |
1429 | static void dwarf2_read_symtab (struct partial_symtab *, |
1430 | struct objfile *); | |
c906108c | 1431 | |
a14ed312 | 1432 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1433 | |
433df2d4 DE |
1434 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1435 | (const struct abbrev_table *, unsigned int); | |
1436 | ||
1437 | static struct abbrev_table *abbrev_table_read_table | |
1438 | (struct dwarf2_section_info *, sect_offset); | |
1439 | ||
1440 | static void abbrev_table_free (struct abbrev_table *); | |
1441 | ||
f4dc4d17 DE |
1442 | static void abbrev_table_free_cleanup (void *); |
1443 | ||
dee91e82 DE |
1444 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1445 | struct dwarf2_section_info *); | |
c906108c | 1446 | |
f3dd6933 | 1447 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1448 | |
d521ce57 | 1449 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1450 | |
dee91e82 | 1451 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1452 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1453 | |
d521ce57 TT |
1454 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1455 | struct partial_die_info *, | |
1456 | struct abbrev_info *, | |
1457 | unsigned int, | |
1458 | const gdb_byte *); | |
c906108c | 1459 | |
36586728 | 1460 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1461 | struct dwarf2_cu *); |
72bf9492 DJ |
1462 | |
1463 | static void fixup_partial_die (struct partial_die_info *, | |
1464 | struct dwarf2_cu *); | |
1465 | ||
d521ce57 TT |
1466 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1467 | struct attribute *, struct attr_abbrev *, | |
1468 | const gdb_byte *); | |
a8329558 | 1469 | |
a1855c1d | 1470 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1471 | |
a1855c1d | 1472 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1473 | |
a1855c1d | 1474 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1475 | |
a1855c1d | 1476 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1477 | |
a1855c1d | 1478 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1479 | |
d521ce57 | 1480 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1481 | unsigned int *); |
c906108c | 1482 | |
d521ce57 | 1483 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1484 | |
1485 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1486 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1487 | unsigned int *, unsigned int *); |
613e1657 | 1488 | |
d521ce57 TT |
1489 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1490 | const struct comp_unit_head *, | |
c764a876 DE |
1491 | unsigned int *); |
1492 | ||
d521ce57 | 1493 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1494 | |
f4dc4d17 DE |
1495 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1496 | sect_offset); | |
1497 | ||
d521ce57 | 1498 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1499 | |
d521ce57 | 1500 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1501 | |
d521ce57 TT |
1502 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1503 | const struct comp_unit_head *, | |
1504 | unsigned int *); | |
4bdf3d34 | 1505 | |
d521ce57 | 1506 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1507 | |
d521ce57 | 1508 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1509 | |
d521ce57 | 1510 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1511 | |
d521ce57 TT |
1512 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1513 | const gdb_byte *, | |
3019eac3 DE |
1514 | unsigned int *); |
1515 | ||
d521ce57 | 1516 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1517 | ULONGEST str_index); |
3019eac3 | 1518 | |
e142c38c | 1519 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1520 | |
e142c38c DJ |
1521 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1522 | struct dwarf2_cu *); | |
c906108c | 1523 | |
348e048f | 1524 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1525 | unsigned int); |
348e048f | 1526 | |
7d45c7c3 KB |
1527 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1528 | struct dwarf2_cu *cu); | |
1529 | ||
05cf31d1 JB |
1530 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1531 | struct dwarf2_cu *cu); | |
1532 | ||
e142c38c | 1533 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1534 | |
e142c38c | 1535 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1536 | struct dwarf2_cu **); |
63d06c5c | 1537 | |
debd256d JB |
1538 | static void free_line_header (struct line_header *lh); |
1539 | ||
3019eac3 DE |
1540 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1541 | struct dwarf2_cu *cu); | |
debd256d | 1542 | |
f3f5162e | 1543 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1544 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1545 | CORE_ADDR, int decode_mapping); |
c906108c | 1546 | |
4d663531 | 1547 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1548 | |
43f3e411 DE |
1549 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1550 | const char *, const char *, | |
1551 | CORE_ADDR); | |
f4dc4d17 | 1552 | |
a14ed312 | 1553 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1554 | struct dwarf2_cu *); |
c906108c | 1555 | |
34eaf542 TT |
1556 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1557 | struct dwarf2_cu *, struct symbol *); | |
1558 | ||
ff39bb5e | 1559 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1560 | struct dwarf2_cu *); |
c906108c | 1561 | |
ff39bb5e | 1562 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1563 | struct type *type, |
1564 | const char *name, | |
1565 | struct obstack *obstack, | |
12df843f | 1566 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1567 | const gdb_byte **bytes, |
98bfdba5 | 1568 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1569 | |
e7c27a73 | 1570 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1571 | |
b4ba55a1 JB |
1572 | static int need_gnat_info (struct dwarf2_cu *); |
1573 | ||
3e43a32a MS |
1574 | static struct type *die_descriptive_type (struct die_info *, |
1575 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1576 | |
1577 | static void set_descriptive_type (struct type *, struct die_info *, | |
1578 | struct dwarf2_cu *); | |
1579 | ||
e7c27a73 DJ |
1580 | static struct type *die_containing_type (struct die_info *, |
1581 | struct dwarf2_cu *); | |
c906108c | 1582 | |
ff39bb5e | 1583 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1584 | struct dwarf2_cu *); |
c906108c | 1585 | |
f792889a | 1586 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1587 | |
673bfd45 DE |
1588 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1589 | ||
0d5cff50 | 1590 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1591 | |
6e70227d | 1592 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1593 | const char *suffix, int physname, |
1594 | struct dwarf2_cu *cu); | |
63d06c5c | 1595 | |
e7c27a73 | 1596 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1597 | |
348e048f DE |
1598 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1599 | ||
e7c27a73 | 1600 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1601 | |
e7c27a73 | 1602 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1603 | |
96408a79 SA |
1604 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1605 | ||
ff013f42 JK |
1606 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1607 | struct dwarf2_cu *, struct partial_symtab *); | |
1608 | ||
a14ed312 | 1609 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1610 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1611 | struct partial_symtab *); | |
c906108c | 1612 | |
fae299cd DC |
1613 | static void get_scope_pc_bounds (struct die_info *, |
1614 | CORE_ADDR *, CORE_ADDR *, | |
1615 | struct dwarf2_cu *); | |
1616 | ||
801e3a5b JB |
1617 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1618 | CORE_ADDR, struct dwarf2_cu *); | |
1619 | ||
a14ed312 | 1620 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1621 | struct dwarf2_cu *); |
c906108c | 1622 | |
a14ed312 | 1623 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1624 | struct type *, struct dwarf2_cu *); |
c906108c | 1625 | |
a14ed312 | 1626 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1627 | struct die_info *, struct type *, |
e7c27a73 | 1628 | struct dwarf2_cu *); |
c906108c | 1629 | |
a14ed312 | 1630 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1631 | struct type *, |
1632 | struct dwarf2_cu *); | |
c906108c | 1633 | |
134d01f1 | 1634 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1635 | |
e7c27a73 | 1636 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1637 | |
e7c27a73 | 1638 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1639 | |
5d7cb8df JK |
1640 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1641 | ||
22cee43f PMR |
1642 | static struct using_direct **using_directives (enum language); |
1643 | ||
27aa8d6a SW |
1644 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1645 | ||
74921315 KS |
1646 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1647 | ||
f55ee35c JK |
1648 | static struct type *read_module_type (struct die_info *die, |
1649 | struct dwarf2_cu *cu); | |
1650 | ||
38d518c9 | 1651 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1652 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1653 | |
134d01f1 | 1654 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1655 | |
e7c27a73 | 1656 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1657 | |
6e70227d | 1658 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1659 | struct dwarf2_cu *); |
1660 | ||
bf6af496 | 1661 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1662 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1663 | struct die_info *); |
639d11d3 | 1664 | |
dee91e82 | 1665 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1666 | const gdb_byte *info_ptr, |
1667 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1668 | struct die_info *parent); |
1669 | ||
d521ce57 TT |
1670 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1671 | struct die_info **, const gdb_byte *, | |
1672 | int *, int); | |
3019eac3 | 1673 | |
d521ce57 TT |
1674 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1675 | struct die_info **, const gdb_byte *, | |
1676 | int *); | |
93311388 | 1677 | |
e7c27a73 | 1678 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1679 | |
15d034d0 TT |
1680 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1681 | struct obstack *); | |
71c25dea | 1682 | |
15d034d0 | 1683 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1684 | |
15d034d0 | 1685 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1686 | struct die_info *die, |
1687 | struct dwarf2_cu *cu); | |
1688 | ||
ca69b9e6 DE |
1689 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1690 | struct dwarf2_cu *cu); | |
1691 | ||
e142c38c | 1692 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1693 | struct dwarf2_cu **); |
9219021c | 1694 | |
f39c6ffd | 1695 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1696 | |
f39c6ffd | 1697 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1698 | |
f39c6ffd | 1699 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1700 | |
a14ed312 | 1701 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1702 | |
f39c6ffd | 1703 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1704 | |
f9aca02d | 1705 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1706 | |
d97bc12b DE |
1707 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1708 | ||
1709 | static void dump_die_for_error (struct die_info *); | |
1710 | ||
1711 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1712 | struct die_info *); | |
c906108c | 1713 | |
d97bc12b | 1714 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1715 | |
51545339 | 1716 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1717 | struct dwarf2_cu *); |
c906108c | 1718 | |
ff39bb5e | 1719 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1720 | |
ff39bb5e | 1721 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1722 | |
348e048f | 1723 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1724 | const struct attribute *, |
348e048f DE |
1725 | struct dwarf2_cu **); |
1726 | ||
10b3939b | 1727 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1728 | const struct attribute *, |
f2f0e013 | 1729 | struct dwarf2_cu **); |
c906108c | 1730 | |
348e048f | 1731 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1732 | const struct attribute *, |
348e048f DE |
1733 | struct dwarf2_cu **); |
1734 | ||
ac9ec31b DE |
1735 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1736 | struct dwarf2_cu *); | |
1737 | ||
1738 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1739 | const struct attribute *, |
ac9ec31b DE |
1740 | struct dwarf2_cu *); |
1741 | ||
e5fe5e75 | 1742 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1743 | |
52dc124a | 1744 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1745 | |
63e43d3a PMR |
1746 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1747 | struct die_info *die, struct dwarf2_cu *cu, | |
1748 | struct dynamic_prop *prop); | |
1749 | ||
c906108c SS |
1750 | /* memory allocation interface */ |
1751 | ||
7b5a2f43 | 1752 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1753 | |
b60c80d6 | 1754 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1755 | |
43f3e411 | 1756 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1757 | |
6e5a29e1 | 1758 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1759 | |
6e5a29e1 | 1760 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1761 | |
6e5a29e1 | 1762 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1763 | |
6e5a29e1 | 1764 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1765 | |
8cf6f0b1 TT |
1766 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1767 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1768 | const struct attribute *attr); |
8cf6f0b1 | 1769 | |
ff39bb5e | 1770 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1771 | struct symbol *sym, |
f1e6e072 TT |
1772 | struct dwarf2_cu *cu, |
1773 | int is_block); | |
4c2df51b | 1774 | |
d521ce57 TT |
1775 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1776 | const gdb_byte *info_ptr, | |
1777 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1778 | |
72bf9492 DJ |
1779 | static void free_stack_comp_unit (void *); |
1780 | ||
72bf9492 DJ |
1781 | static hashval_t partial_die_hash (const void *item); |
1782 | ||
1783 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1784 | ||
ae038cb0 | 1785 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1786 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1787 | |
9816fde3 | 1788 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1789 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1790 | |
1791 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1792 | struct die_info *comp_unit_die, |
1793 | enum language pretend_language); | |
93311388 | 1794 | |
68dc6402 | 1795 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1796 | |
1797 | static void free_cached_comp_units (void *); | |
1798 | ||
1799 | static void age_cached_comp_units (void); | |
1800 | ||
dee91e82 | 1801 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1802 | |
f792889a DJ |
1803 | static struct type *set_die_type (struct die_info *, struct type *, |
1804 | struct dwarf2_cu *); | |
1c379e20 | 1805 | |
ae038cb0 DJ |
1806 | static void create_all_comp_units (struct objfile *); |
1807 | ||
0e50663e | 1808 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1809 | |
95554aad TT |
1810 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1811 | enum language); | |
10b3939b | 1812 | |
95554aad TT |
1813 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1814 | enum language); | |
10b3939b | 1815 | |
f4dc4d17 DE |
1816 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1817 | enum language); | |
1818 | ||
10b3939b DJ |
1819 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1820 | struct dwarf2_per_cu_data *); | |
1821 | ||
ae038cb0 DJ |
1822 | static void dwarf2_mark (struct dwarf2_cu *); |
1823 | ||
1824 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1825 | ||
b64f50a1 | 1826 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1827 | struct dwarf2_per_cu_data *); |
673bfd45 | 1828 | |
f792889a | 1829 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1830 | |
9291a0cd TT |
1831 | static void dwarf2_release_queue (void *dummy); |
1832 | ||
95554aad TT |
1833 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1834 | enum language pretend_language); | |
1835 | ||
a0f42c21 | 1836 | static void process_queue (void); |
9291a0cd TT |
1837 | |
1838 | static void find_file_and_directory (struct die_info *die, | |
1839 | struct dwarf2_cu *cu, | |
15d034d0 | 1840 | const char **name, const char **comp_dir); |
9291a0cd TT |
1841 | |
1842 | static char *file_full_name (int file, struct line_header *lh, | |
1843 | const char *comp_dir); | |
1844 | ||
d521ce57 | 1845 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1846 | (struct comp_unit_head *header, |
1847 | struct dwarf2_section_info *section, | |
d521ce57 | 1848 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1849 | int is_debug_types_section); |
1850 | ||
fd820528 | 1851 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1852 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1853 | int use_existing_cu, int keep, | |
3019eac3 DE |
1854 | die_reader_func_ftype *die_reader_func, void *data); |
1855 | ||
dee91e82 DE |
1856 | static void init_cutu_and_read_dies_simple |
1857 | (struct dwarf2_per_cu_data *this_cu, | |
1858 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1859 | |
673bfd45 | 1860 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1861 | |
3019eac3 DE |
1862 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1863 | ||
57d63ce2 DE |
1864 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1865 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1866 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1867 | |
1868 | static struct dwp_file *get_dwp_file (void); | |
1869 | ||
3019eac3 | 1870 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1871 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1872 | |
1873 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1874 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1875 | |
89e63ee4 DE |
1876 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1877 | ||
3019eac3 DE |
1878 | static void free_dwo_file_cleanup (void *); |
1879 | ||
95554aad TT |
1880 | static void process_cu_includes (void); |
1881 | ||
1b80a9fa | 1882 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1883 | |
1884 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1885 | \f |
1886 | /* Various complaints about symbol reading that don't abort the process. */ | |
1887 | ||
1888 | static void | |
1889 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1890 | { | |
1891 | complaint (&symfile_complaints, | |
1892 | _("statement list doesn't fit in .debug_line section")); | |
1893 | } | |
1894 | ||
1895 | static void | |
1896 | dwarf2_debug_line_missing_file_complaint (void) | |
1897 | { | |
1898 | complaint (&symfile_complaints, | |
1899 | _(".debug_line section has line data without a file")); | |
1900 | } | |
1901 | ||
1902 | static void | |
1903 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1904 | { | |
1905 | complaint (&symfile_complaints, | |
1906 | _(".debug_line section has line " | |
1907 | "program sequence without an end")); | |
1908 | } | |
1909 | ||
1910 | static void | |
1911 | dwarf2_complex_location_expr_complaint (void) | |
1912 | { | |
1913 | complaint (&symfile_complaints, _("location expression too complex")); | |
1914 | } | |
1915 | ||
1916 | static void | |
1917 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1918 | int arg3) | |
1919 | { | |
1920 | complaint (&symfile_complaints, | |
1921 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1922 | arg1, arg2, arg3); | |
1923 | } | |
1924 | ||
1925 | static void | |
1926 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1927 | { | |
1928 | complaint (&symfile_complaints, | |
1929 | _("debug info runs off end of %s section" | |
1930 | " [in module %s]"), | |
a32a8923 DE |
1931 | get_section_name (section), |
1932 | get_section_file_name (section)); | |
4390d890 | 1933 | } |
1b80a9fa | 1934 | |
4390d890 DE |
1935 | static void |
1936 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1937 | { | |
1938 | complaint (&symfile_complaints, | |
1939 | _("macro debug info contains a " | |
1940 | "malformed macro definition:\n`%s'"), | |
1941 | arg1); | |
1942 | } | |
1943 | ||
1944 | static void | |
1945 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1946 | { | |
1947 | complaint (&symfile_complaints, | |
1948 | _("invalid attribute class or form for '%s' in '%s'"), | |
1949 | arg1, arg2); | |
1950 | } | |
527f3840 JK |
1951 | |
1952 | /* Hash function for line_header_hash. */ | |
1953 | ||
1954 | static hashval_t | |
1955 | line_header_hash (const struct line_header *ofs) | |
1956 | { | |
1957 | return ofs->offset.sect_off ^ ofs->offset_in_dwz; | |
1958 | } | |
1959 | ||
1960 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1961 | ||
1962 | static hashval_t | |
1963 | line_header_hash_voidp (const void *item) | |
1964 | { | |
9a3c8263 | 1965 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1966 | |
1967 | return line_header_hash (ofs); | |
1968 | } | |
1969 | ||
1970 | /* Equality function for line_header_hash. */ | |
1971 | ||
1972 | static int | |
1973 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1974 | { | |
9a3c8263 SM |
1975 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1976 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 JK |
1977 | |
1978 | return (ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off | |
1979 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); | |
1980 | } | |
1981 | ||
4390d890 | 1982 | \f |
9291a0cd TT |
1983 | #if WORDS_BIGENDIAN |
1984 | ||
1985 | /* Convert VALUE between big- and little-endian. */ | |
1986 | static offset_type | |
1987 | byte_swap (offset_type value) | |
1988 | { | |
1989 | offset_type result; | |
1990 | ||
1991 | result = (value & 0xff) << 24; | |
1992 | result |= (value & 0xff00) << 8; | |
1993 | result |= (value & 0xff0000) >> 8; | |
1994 | result |= (value & 0xff000000) >> 24; | |
1995 | return result; | |
1996 | } | |
1997 | ||
1998 | #define MAYBE_SWAP(V) byte_swap (V) | |
1999 | ||
2000 | #else | |
2001 | #define MAYBE_SWAP(V) (V) | |
2002 | #endif /* WORDS_BIGENDIAN */ | |
2003 | ||
31aa7e4e JB |
2004 | /* Read the given attribute value as an address, taking the attribute's |
2005 | form into account. */ | |
2006 | ||
2007 | static CORE_ADDR | |
2008 | attr_value_as_address (struct attribute *attr) | |
2009 | { | |
2010 | CORE_ADDR addr; | |
2011 | ||
2012 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2013 | { | |
2014 | /* Aside from a few clearly defined exceptions, attributes that | |
2015 | contain an address must always be in DW_FORM_addr form. | |
2016 | Unfortunately, some compilers happen to be violating this | |
2017 | requirement by encoding addresses using other forms, such | |
2018 | as DW_FORM_data4 for example. For those broken compilers, | |
2019 | we try to do our best, without any guarantee of success, | |
2020 | to interpret the address correctly. It would also be nice | |
2021 | to generate a complaint, but that would require us to maintain | |
2022 | a list of legitimate cases where a non-address form is allowed, | |
2023 | as well as update callers to pass in at least the CU's DWARF | |
2024 | version. This is more overhead than what we're willing to | |
2025 | expand for a pretty rare case. */ | |
2026 | addr = DW_UNSND (attr); | |
2027 | } | |
2028 | else | |
2029 | addr = DW_ADDR (attr); | |
2030 | ||
2031 | return addr; | |
2032 | } | |
2033 | ||
9291a0cd TT |
2034 | /* The suffix for an index file. */ |
2035 | #define INDEX_SUFFIX ".gdb-index" | |
2036 | ||
c906108c | 2037 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2038 | information and return true if we have enough to do something. |
2039 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2040 | ELF names are used. */ | |
c906108c SS |
2041 | |
2042 | int | |
251d32d9 TG |
2043 | dwarf2_has_info (struct objfile *objfile, |
2044 | const struct dwarf2_debug_sections *names) | |
c906108c | 2045 | { |
9a3c8263 SM |
2046 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2047 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2048 | if (!dwarf2_per_objfile) |
2049 | { | |
2050 | /* Initialize per-objfile state. */ | |
2051 | struct dwarf2_per_objfile *data | |
8d749320 | 2052 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2053 | |
be391dca TT |
2054 | memset (data, 0, sizeof (*data)); |
2055 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
2056 | dwarf2_per_objfile = data; | |
6502dd73 | 2057 | |
251d32d9 TG |
2058 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
2059 | (void *) names); | |
be391dca TT |
2060 | dwarf2_per_objfile->objfile = objfile; |
2061 | } | |
73869dc2 | 2062 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2063 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2064 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2065 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2066 | } |
2067 | ||
2068 | /* Return the containing section of virtual section SECTION. */ | |
2069 | ||
2070 | static struct dwarf2_section_info * | |
2071 | get_containing_section (const struct dwarf2_section_info *section) | |
2072 | { | |
2073 | gdb_assert (section->is_virtual); | |
2074 | return section->s.containing_section; | |
c906108c SS |
2075 | } |
2076 | ||
a32a8923 DE |
2077 | /* Return the bfd owner of SECTION. */ |
2078 | ||
2079 | static struct bfd * | |
2080 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2081 | { | |
73869dc2 DE |
2082 | if (section->is_virtual) |
2083 | { | |
2084 | section = get_containing_section (section); | |
2085 | gdb_assert (!section->is_virtual); | |
2086 | } | |
049412e3 | 2087 | return section->s.section->owner; |
a32a8923 DE |
2088 | } |
2089 | ||
2090 | /* Return the bfd section of SECTION. | |
2091 | Returns NULL if the section is not present. */ | |
2092 | ||
2093 | static asection * | |
2094 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2095 | { | |
73869dc2 DE |
2096 | if (section->is_virtual) |
2097 | { | |
2098 | section = get_containing_section (section); | |
2099 | gdb_assert (!section->is_virtual); | |
2100 | } | |
049412e3 | 2101 | return section->s.section; |
a32a8923 DE |
2102 | } |
2103 | ||
2104 | /* Return the name of SECTION. */ | |
2105 | ||
2106 | static const char * | |
2107 | get_section_name (const struct dwarf2_section_info *section) | |
2108 | { | |
2109 | asection *sectp = get_section_bfd_section (section); | |
2110 | ||
2111 | gdb_assert (sectp != NULL); | |
2112 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2113 | } | |
2114 | ||
2115 | /* Return the name of the file SECTION is in. */ | |
2116 | ||
2117 | static const char * | |
2118 | get_section_file_name (const struct dwarf2_section_info *section) | |
2119 | { | |
2120 | bfd *abfd = get_section_bfd_owner (section); | |
2121 | ||
2122 | return bfd_get_filename (abfd); | |
2123 | } | |
2124 | ||
2125 | /* Return the id of SECTION. | |
2126 | Returns 0 if SECTION doesn't exist. */ | |
2127 | ||
2128 | static int | |
2129 | get_section_id (const struct dwarf2_section_info *section) | |
2130 | { | |
2131 | asection *sectp = get_section_bfd_section (section); | |
2132 | ||
2133 | if (sectp == NULL) | |
2134 | return 0; | |
2135 | return sectp->id; | |
2136 | } | |
2137 | ||
2138 | /* Return the flags of SECTION. | |
73869dc2 | 2139 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2140 | |
2141 | static int | |
2142 | get_section_flags (const struct dwarf2_section_info *section) | |
2143 | { | |
2144 | asection *sectp = get_section_bfd_section (section); | |
2145 | ||
2146 | gdb_assert (sectp != NULL); | |
2147 | return bfd_get_section_flags (sectp->owner, sectp); | |
2148 | } | |
2149 | ||
251d32d9 TG |
2150 | /* When loading sections, we look either for uncompressed section or for |
2151 | compressed section names. */ | |
233a11ab CS |
2152 | |
2153 | static int | |
251d32d9 TG |
2154 | section_is_p (const char *section_name, |
2155 | const struct dwarf2_section_names *names) | |
233a11ab | 2156 | { |
251d32d9 TG |
2157 | if (names->normal != NULL |
2158 | && strcmp (section_name, names->normal) == 0) | |
2159 | return 1; | |
2160 | if (names->compressed != NULL | |
2161 | && strcmp (section_name, names->compressed) == 0) | |
2162 | return 1; | |
2163 | return 0; | |
233a11ab CS |
2164 | } |
2165 | ||
c906108c SS |
2166 | /* This function is mapped across the sections and remembers the |
2167 | offset and size of each of the debugging sections we are interested | |
2168 | in. */ | |
2169 | ||
2170 | static void | |
251d32d9 | 2171 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 2172 | { |
251d32d9 | 2173 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 2174 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
2175 | |
2176 | if (vnames == NULL) | |
2177 | names = &dwarf2_elf_names; | |
2178 | else | |
2179 | names = (const struct dwarf2_debug_sections *) vnames; | |
2180 | ||
dc7650b8 JK |
2181 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2182 | { | |
2183 | } | |
2184 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 2185 | { |
049412e3 | 2186 | dwarf2_per_objfile->info.s.section = sectp; |
dce234bc | 2187 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); |
c906108c | 2188 | } |
251d32d9 | 2189 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 2190 | { |
049412e3 | 2191 | dwarf2_per_objfile->abbrev.s.section = sectp; |
dce234bc | 2192 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); |
c906108c | 2193 | } |
251d32d9 | 2194 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 2195 | { |
049412e3 | 2196 | dwarf2_per_objfile->line.s.section = sectp; |
dce234bc | 2197 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); |
c906108c | 2198 | } |
251d32d9 | 2199 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 2200 | { |
049412e3 | 2201 | dwarf2_per_objfile->loc.s.section = sectp; |
dce234bc | 2202 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); |
c906108c | 2203 | } |
251d32d9 | 2204 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 2205 | { |
049412e3 | 2206 | dwarf2_per_objfile->macinfo.s.section = sectp; |
dce234bc | 2207 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); |
c906108c | 2208 | } |
cf2c3c16 TT |
2209 | else if (section_is_p (sectp->name, &names->macro)) |
2210 | { | |
049412e3 | 2211 | dwarf2_per_objfile->macro.s.section = sectp; |
cf2c3c16 TT |
2212 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); |
2213 | } | |
251d32d9 | 2214 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 2215 | { |
049412e3 | 2216 | dwarf2_per_objfile->str.s.section = sectp; |
dce234bc | 2217 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); |
c906108c | 2218 | } |
3019eac3 DE |
2219 | else if (section_is_p (sectp->name, &names->addr)) |
2220 | { | |
049412e3 | 2221 | dwarf2_per_objfile->addr.s.section = sectp; |
3019eac3 DE |
2222 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); |
2223 | } | |
251d32d9 | 2224 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 2225 | { |
049412e3 | 2226 | dwarf2_per_objfile->frame.s.section = sectp; |
dce234bc | 2227 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2228 | } |
251d32d9 | 2229 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 2230 | { |
049412e3 | 2231 | dwarf2_per_objfile->eh_frame.s.section = sectp; |
dc7650b8 | 2232 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2233 | } |
251d32d9 | 2234 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2235 | { |
049412e3 | 2236 | dwarf2_per_objfile->ranges.s.section = sectp; |
dce234bc | 2237 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); |
af34e669 | 2238 | } |
251d32d9 | 2239 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2240 | { |
8b70b953 TT |
2241 | struct dwarf2_section_info type_section; |
2242 | ||
2243 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2244 | type_section.s.section = sectp; |
8b70b953 TT |
2245 | type_section.size = bfd_get_section_size (sectp); |
2246 | ||
2247 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2248 | &type_section); | |
348e048f | 2249 | } |
251d32d9 | 2250 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd | 2251 | { |
049412e3 | 2252 | dwarf2_per_objfile->gdb_index.s.section = sectp; |
9291a0cd TT |
2253 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); |
2254 | } | |
dce234bc | 2255 | |
b4e1fd61 | 2256 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 FR |
2257 | && bfd_section_vma (abfd, sectp) == 0) |
2258 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2259 | } |
2260 | ||
fceca515 DE |
2261 | /* A helper function that decides whether a section is empty, |
2262 | or not present. */ | |
9e0ac564 TT |
2263 | |
2264 | static int | |
19ac8c2e | 2265 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2266 | { |
73869dc2 DE |
2267 | if (section->is_virtual) |
2268 | return section->size == 0; | |
049412e3 | 2269 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2270 | } |
2271 | ||
3019eac3 DE |
2272 | /* Read the contents of the section INFO. |
2273 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2274 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2275 | of the DWO file. | |
dce234bc | 2276 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2277 | |
dce234bc PP |
2278 | static void |
2279 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2280 | { |
a32a8923 | 2281 | asection *sectp; |
3019eac3 | 2282 | bfd *abfd; |
dce234bc | 2283 | gdb_byte *buf, *retbuf; |
c906108c | 2284 | |
be391dca TT |
2285 | if (info->readin) |
2286 | return; | |
dce234bc | 2287 | info->buffer = NULL; |
be391dca | 2288 | info->readin = 1; |
188dd5d6 | 2289 | |
9e0ac564 | 2290 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2291 | return; |
c906108c | 2292 | |
a32a8923 | 2293 | sectp = get_section_bfd_section (info); |
3019eac3 | 2294 | |
73869dc2 DE |
2295 | /* If this is a virtual section we need to read in the real one first. */ |
2296 | if (info->is_virtual) | |
2297 | { | |
2298 | struct dwarf2_section_info *containing_section = | |
2299 | get_containing_section (info); | |
2300 | ||
2301 | gdb_assert (sectp != NULL); | |
2302 | if ((sectp->flags & SEC_RELOC) != 0) | |
2303 | { | |
2304 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2305 | " supported in section %s [in module %s]"), | |
2306 | get_section_name (info), get_section_file_name (info)); | |
2307 | } | |
2308 | dwarf2_read_section (objfile, containing_section); | |
2309 | /* Other code should have already caught virtual sections that don't | |
2310 | fit. */ | |
2311 | gdb_assert (info->virtual_offset + info->size | |
2312 | <= containing_section->size); | |
2313 | /* If the real section is empty or there was a problem reading the | |
2314 | section we shouldn't get here. */ | |
2315 | gdb_assert (containing_section->buffer != NULL); | |
2316 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2317 | return; | |
2318 | } | |
2319 | ||
4bf44c1c TT |
2320 | /* If the section has relocations, we must read it ourselves. |
2321 | Otherwise we attach it to the BFD. */ | |
2322 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2323 | { |
d521ce57 | 2324 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2325 | return; |
dce234bc | 2326 | } |
dce234bc | 2327 | |
224c3ddb | 2328 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2329 | info->buffer = buf; |
dce234bc PP |
2330 | |
2331 | /* When debugging .o files, we may need to apply relocations; see | |
2332 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2333 | We never compress sections in .o files, so we only need to | |
2334 | try this when the section is not compressed. */ | |
ac8035ab | 2335 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2336 | if (retbuf != NULL) |
2337 | { | |
2338 | info->buffer = retbuf; | |
2339 | return; | |
2340 | } | |
2341 | ||
a32a8923 DE |
2342 | abfd = get_section_bfd_owner (info); |
2343 | gdb_assert (abfd != NULL); | |
2344 | ||
dce234bc PP |
2345 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2346 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2347 | { |
2348 | error (_("Dwarf Error: Can't read DWARF data" | |
2349 | " in section %s [in module %s]"), | |
2350 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2351 | } | |
dce234bc PP |
2352 | } |
2353 | ||
9e0ac564 TT |
2354 | /* A helper function that returns the size of a section in a safe way. |
2355 | If you are positive that the section has been read before using the | |
2356 | size, then it is safe to refer to the dwarf2_section_info object's | |
2357 | "size" field directly. In other cases, you must call this | |
2358 | function, because for compressed sections the size field is not set | |
2359 | correctly until the section has been read. */ | |
2360 | ||
2361 | static bfd_size_type | |
2362 | dwarf2_section_size (struct objfile *objfile, | |
2363 | struct dwarf2_section_info *info) | |
2364 | { | |
2365 | if (!info->readin) | |
2366 | dwarf2_read_section (objfile, info); | |
2367 | return info->size; | |
2368 | } | |
2369 | ||
dce234bc | 2370 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2371 | SECTION_NAME. */ |
af34e669 | 2372 | |
dce234bc | 2373 | void |
3017a003 TG |
2374 | dwarf2_get_section_info (struct objfile *objfile, |
2375 | enum dwarf2_section_enum sect, | |
d521ce57 | 2376 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2377 | bfd_size_type *sizep) |
2378 | { | |
2379 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2380 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2381 | dwarf2_objfile_data_key); | |
dce234bc | 2382 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2383 | |
2384 | /* We may see an objfile without any DWARF, in which case we just | |
2385 | return nothing. */ | |
2386 | if (data == NULL) | |
2387 | { | |
2388 | *sectp = NULL; | |
2389 | *bufp = NULL; | |
2390 | *sizep = 0; | |
2391 | return; | |
2392 | } | |
3017a003 TG |
2393 | switch (sect) |
2394 | { | |
2395 | case DWARF2_DEBUG_FRAME: | |
2396 | info = &data->frame; | |
2397 | break; | |
2398 | case DWARF2_EH_FRAME: | |
2399 | info = &data->eh_frame; | |
2400 | break; | |
2401 | default: | |
2402 | gdb_assert_not_reached ("unexpected section"); | |
2403 | } | |
dce234bc | 2404 | |
9e0ac564 | 2405 | dwarf2_read_section (objfile, info); |
dce234bc | 2406 | |
a32a8923 | 2407 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2408 | *bufp = info->buffer; |
2409 | *sizep = info->size; | |
2410 | } | |
2411 | ||
36586728 TT |
2412 | /* A helper function to find the sections for a .dwz file. */ |
2413 | ||
2414 | static void | |
2415 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2416 | { | |
9a3c8263 | 2417 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2418 | |
2419 | /* Note that we only support the standard ELF names, because .dwz | |
2420 | is ELF-only (at the time of writing). */ | |
2421 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2422 | { | |
049412e3 | 2423 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2424 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2425 | } | |
2426 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2427 | { | |
049412e3 | 2428 | dwz_file->info.s.section = sectp; |
36586728 TT |
2429 | dwz_file->info.size = bfd_get_section_size (sectp); |
2430 | } | |
2431 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2432 | { | |
049412e3 | 2433 | dwz_file->str.s.section = sectp; |
36586728 TT |
2434 | dwz_file->str.size = bfd_get_section_size (sectp); |
2435 | } | |
2436 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2437 | { | |
049412e3 | 2438 | dwz_file->line.s.section = sectp; |
36586728 TT |
2439 | dwz_file->line.size = bfd_get_section_size (sectp); |
2440 | } | |
2441 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2442 | { | |
049412e3 | 2443 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2444 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2445 | } | |
2ec9a5e0 TT |
2446 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2447 | { | |
049412e3 | 2448 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2449 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2450 | } | |
36586728 TT |
2451 | } |
2452 | ||
4db1a1dc TT |
2453 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2454 | there is no .gnu_debugaltlink section in the file. Error if there | |
2455 | is such a section but the file cannot be found. */ | |
36586728 TT |
2456 | |
2457 | static struct dwz_file * | |
2458 | dwarf2_get_dwz_file (void) | |
2459 | { | |
4db1a1dc TT |
2460 | bfd *dwz_bfd; |
2461 | char *data; | |
36586728 TT |
2462 | struct cleanup *cleanup; |
2463 | const char *filename; | |
2464 | struct dwz_file *result; | |
acd13123 | 2465 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2466 | size_t buildid_len; |
2467 | bfd_byte *buildid; | |
36586728 TT |
2468 | |
2469 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2470 | return dwarf2_per_objfile->dwz_file; | |
2471 | ||
4db1a1dc TT |
2472 | bfd_set_error (bfd_error_no_error); |
2473 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2474 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2475 | if (data == NULL) |
2476 | { | |
2477 | if (bfd_get_error () == bfd_error_no_error) | |
2478 | return NULL; | |
2479 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2480 | bfd_errmsg (bfd_get_error ())); | |
2481 | } | |
36586728 | 2482 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2483 | make_cleanup (xfree, buildid); |
36586728 | 2484 | |
acd13123 TT |
2485 | buildid_len = (size_t) buildid_len_arg; |
2486 | ||
f9d83a0b | 2487 | filename = (const char *) data; |
36586728 TT |
2488 | if (!IS_ABSOLUTE_PATH (filename)) |
2489 | { | |
4262abfb | 2490 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2491 | char *rel; |
2492 | ||
2493 | make_cleanup (xfree, abs); | |
2494 | abs = ldirname (abs); | |
2495 | make_cleanup (xfree, abs); | |
2496 | ||
2497 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2498 | make_cleanup (xfree, rel); | |
2499 | filename = rel; | |
2500 | } | |
2501 | ||
dc294be5 TT |
2502 | /* First try the file name given in the section. If that doesn't |
2503 | work, try to use the build-id instead. */ | |
36586728 | 2504 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); |
dc294be5 | 2505 | if (dwz_bfd != NULL) |
36586728 | 2506 | { |
dc294be5 TT |
2507 | if (!build_id_verify (dwz_bfd, buildid_len, buildid)) |
2508 | { | |
2509 | gdb_bfd_unref (dwz_bfd); | |
2510 | dwz_bfd = NULL; | |
2511 | } | |
36586728 TT |
2512 | } |
2513 | ||
dc294be5 TT |
2514 | if (dwz_bfd == NULL) |
2515 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2516 | ||
2517 | if (dwz_bfd == NULL) | |
2518 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2519 | objfile_name (dwarf2_per_objfile->objfile)); | |
2520 | ||
36586728 TT |
2521 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2522 | struct dwz_file); | |
2523 | result->dwz_bfd = dwz_bfd; | |
2524 | ||
2525 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2526 | ||
2527 | do_cleanups (cleanup); | |
2528 | ||
13aaf454 | 2529 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd); |
8d2cc612 | 2530 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2531 | return result; |
2532 | } | |
9291a0cd | 2533 | \f |
7b9f3c50 DE |
2534 | /* DWARF quick_symbols_functions support. */ |
2535 | ||
2536 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2537 | unique line tables, so we maintain a separate table of all .debug_line | |
2538 | derived entries to support the sharing. | |
2539 | All the quick functions need is the list of file names. We discard the | |
2540 | line_header when we're done and don't need to record it here. */ | |
2541 | struct quick_file_names | |
2542 | { | |
094b34ac DE |
2543 | /* The data used to construct the hash key. */ |
2544 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2545 | |
2546 | /* The number of entries in file_names, real_names. */ | |
2547 | unsigned int num_file_names; | |
2548 | ||
2549 | /* The file names from the line table, after being run through | |
2550 | file_full_name. */ | |
2551 | const char **file_names; | |
2552 | ||
2553 | /* The file names from the line table after being run through | |
2554 | gdb_realpath. These are computed lazily. */ | |
2555 | const char **real_names; | |
2556 | }; | |
2557 | ||
2558 | /* When using the index (and thus not using psymtabs), each CU has an | |
2559 | object of this type. This is used to hold information needed by | |
2560 | the various "quick" methods. */ | |
2561 | struct dwarf2_per_cu_quick_data | |
2562 | { | |
2563 | /* The file table. This can be NULL if there was no file table | |
2564 | or it's currently not read in. | |
2565 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2566 | struct quick_file_names *file_names; | |
2567 | ||
2568 | /* The corresponding symbol table. This is NULL if symbols for this | |
2569 | CU have not yet been read. */ | |
43f3e411 | 2570 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2571 | |
2572 | /* A temporary mark bit used when iterating over all CUs in | |
2573 | expand_symtabs_matching. */ | |
2574 | unsigned int mark : 1; | |
2575 | ||
2576 | /* True if we've tried to read the file table and found there isn't one. | |
2577 | There will be no point in trying to read it again next time. */ | |
2578 | unsigned int no_file_data : 1; | |
2579 | }; | |
2580 | ||
094b34ac DE |
2581 | /* Utility hash function for a stmt_list_hash. */ |
2582 | ||
2583 | static hashval_t | |
2584 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2585 | { | |
2586 | hashval_t v = 0; | |
2587 | ||
2588 | if (stmt_list_hash->dwo_unit != NULL) | |
2589 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2590 | v += stmt_list_hash->line_offset.sect_off; | |
2591 | return v; | |
2592 | } | |
2593 | ||
2594 | /* Utility equality function for a stmt_list_hash. */ | |
2595 | ||
2596 | static int | |
2597 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2598 | const struct stmt_list_hash *rhs) | |
2599 | { | |
2600 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2601 | return 0; | |
2602 | if (lhs->dwo_unit != NULL | |
2603 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2604 | return 0; | |
2605 | ||
2606 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2607 | } | |
2608 | ||
7b9f3c50 DE |
2609 | /* Hash function for a quick_file_names. */ |
2610 | ||
2611 | static hashval_t | |
2612 | hash_file_name_entry (const void *e) | |
2613 | { | |
9a3c8263 SM |
2614 | const struct quick_file_names *file_data |
2615 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2616 | |
094b34ac | 2617 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2618 | } |
2619 | ||
2620 | /* Equality function for a quick_file_names. */ | |
2621 | ||
2622 | static int | |
2623 | eq_file_name_entry (const void *a, const void *b) | |
2624 | { | |
9a3c8263 SM |
2625 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2626 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2627 | |
094b34ac | 2628 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2629 | } |
2630 | ||
2631 | /* Delete function for a quick_file_names. */ | |
2632 | ||
2633 | static void | |
2634 | delete_file_name_entry (void *e) | |
2635 | { | |
9a3c8263 | 2636 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2637 | int i; |
2638 | ||
2639 | for (i = 0; i < file_data->num_file_names; ++i) | |
2640 | { | |
2641 | xfree ((void*) file_data->file_names[i]); | |
2642 | if (file_data->real_names) | |
2643 | xfree ((void*) file_data->real_names[i]); | |
2644 | } | |
2645 | ||
2646 | /* The space for the struct itself lives on objfile_obstack, | |
2647 | so we don't free it here. */ | |
2648 | } | |
2649 | ||
2650 | /* Create a quick_file_names hash table. */ | |
2651 | ||
2652 | static htab_t | |
2653 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2654 | { | |
2655 | return htab_create_alloc (nr_initial_entries, | |
2656 | hash_file_name_entry, eq_file_name_entry, | |
2657 | delete_file_name_entry, xcalloc, xfree); | |
2658 | } | |
9291a0cd | 2659 | |
918dd910 JK |
2660 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2661 | have to be created afterwards. You should call age_cached_comp_units after | |
2662 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2663 | ||
2664 | static void | |
2665 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2666 | { | |
3019eac3 | 2667 | if (per_cu->is_debug_types) |
e5fe5e75 | 2668 | load_full_type_unit (per_cu); |
918dd910 | 2669 | else |
95554aad | 2670 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2671 | |
cc12ce38 DE |
2672 | if (per_cu->cu == NULL) |
2673 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2674 | |
2675 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2676 | } |
2677 | ||
a0f42c21 | 2678 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2679 | |
9291a0cd | 2680 | static void |
a0f42c21 | 2681 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2682 | { |
2683 | struct cleanup *back_to; | |
2684 | ||
f4dc4d17 DE |
2685 | /* Skip type_unit_groups, reading the type units they contain |
2686 | is handled elsewhere. */ | |
2687 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2688 | return; | |
2689 | ||
9291a0cd TT |
2690 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2691 | ||
95554aad | 2692 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2693 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2694 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2695 | { | |
2696 | queue_comp_unit (per_cu, language_minimal); | |
2697 | load_cu (per_cu); | |
89e63ee4 DE |
2698 | |
2699 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2700 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2701 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2702 | if (!per_cu->is_debug_types | |
cc12ce38 | 2703 | && per_cu->cu != NULL |
89e63ee4 DE |
2704 | && per_cu->cu->dwo_unit != NULL |
2705 | && dwarf2_per_objfile->index_table != NULL | |
2706 | && dwarf2_per_objfile->index_table->version <= 7 | |
2707 | /* DWP files aren't supported yet. */ | |
2708 | && get_dwp_file () == NULL) | |
2709 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2710 | } |
9291a0cd | 2711 | |
a0f42c21 | 2712 | process_queue (); |
9291a0cd TT |
2713 | |
2714 | /* Age the cache, releasing compilation units that have not | |
2715 | been used recently. */ | |
2716 | age_cached_comp_units (); | |
2717 | ||
2718 | do_cleanups (back_to); | |
2719 | } | |
2720 | ||
2721 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2722 | the objfile from which this CU came. Returns the resulting symbol | |
2723 | table. */ | |
2fdf6df6 | 2724 | |
43f3e411 | 2725 | static struct compunit_symtab * |
a0f42c21 | 2726 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2727 | { |
95554aad | 2728 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2729 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2730 | { |
2731 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2732 | increment_reading_symtab (); | |
a0f42c21 | 2733 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2734 | process_cu_includes (); |
9291a0cd TT |
2735 | do_cleanups (back_to); |
2736 | } | |
f194fefb | 2737 | |
43f3e411 | 2738 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2739 | } |
2740 | ||
8832e7e3 | 2741 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2742 | |
2743 | This is intended for loops like: | |
2744 | ||
2745 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2746 | + dwarf2_per_objfile->n_type_units); ++i) | |
2747 | { | |
8832e7e3 | 2748 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2749 | |
2750 | ...; | |
2751 | } | |
2752 | */ | |
2fdf6df6 | 2753 | |
1fd400ff | 2754 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2755 | dw2_get_cutu (int index) |
1fd400ff TT |
2756 | { |
2757 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2758 | { | |
f4dc4d17 | 2759 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2760 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2761 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2762 | } |
2763 | ||
2764 | return dwarf2_per_objfile->all_comp_units[index]; | |
2765 | } | |
2766 | ||
8832e7e3 DE |
2767 | /* Return the CU given its index. |
2768 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2769 | refers to a CU. */ | |
f4dc4d17 DE |
2770 | |
2771 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2772 | dw2_get_cu (int index) |
f4dc4d17 | 2773 | { |
8832e7e3 | 2774 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2775 | |
1fd400ff TT |
2776 | return dwarf2_per_objfile->all_comp_units[index]; |
2777 | } | |
2778 | ||
2ec9a5e0 TT |
2779 | /* A helper for create_cus_from_index that handles a given list of |
2780 | CUs. */ | |
2fdf6df6 | 2781 | |
74a0d9f6 | 2782 | static void |
2ec9a5e0 TT |
2783 | create_cus_from_index_list (struct objfile *objfile, |
2784 | const gdb_byte *cu_list, offset_type n_elements, | |
2785 | struct dwarf2_section_info *section, | |
2786 | int is_dwz, | |
2787 | int base_offset) | |
9291a0cd TT |
2788 | { |
2789 | offset_type i; | |
9291a0cd | 2790 | |
2ec9a5e0 | 2791 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2792 | { |
2793 | struct dwarf2_per_cu_data *the_cu; | |
2794 | ULONGEST offset, length; | |
2795 | ||
74a0d9f6 JK |
2796 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2797 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2798 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2799 | cu_list += 2 * 8; |
2800 | ||
2801 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2802 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2803 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2804 | the_cu->length = length; |
2805 | the_cu->objfile = objfile; | |
8a0459fd | 2806 | the_cu->section = section; |
9291a0cd TT |
2807 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2808 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2809 | the_cu->is_dwz = is_dwz; |
2810 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2811 | } |
9291a0cd TT |
2812 | } |
2813 | ||
2ec9a5e0 | 2814 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2815 | the CU objects for this objfile. */ |
2ec9a5e0 | 2816 | |
74a0d9f6 | 2817 | static void |
2ec9a5e0 TT |
2818 | create_cus_from_index (struct objfile *objfile, |
2819 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2820 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2821 | { | |
2822 | struct dwz_file *dwz; | |
2823 | ||
2824 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
2825 | dwarf2_per_objfile->all_comp_units = |
2826 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
2827 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 2828 | |
74a0d9f6 JK |
2829 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2830 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2831 | |
2832 | if (dwz_elements == 0) | |
74a0d9f6 | 2833 | return; |
2ec9a5e0 TT |
2834 | |
2835 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2836 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2837 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2838 | } |
2839 | ||
1fd400ff | 2840 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2841 | |
74a0d9f6 | 2842 | static void |
673bfd45 | 2843 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2844 | struct dwarf2_section_info *section, |
673bfd45 DE |
2845 | const gdb_byte *bytes, |
2846 | offset_type elements) | |
1fd400ff TT |
2847 | { |
2848 | offset_type i; | |
673bfd45 | 2849 | htab_t sig_types_hash; |
1fd400ff | 2850 | |
6aa5f3a6 DE |
2851 | dwarf2_per_objfile->n_type_units |
2852 | = dwarf2_per_objfile->n_allocated_type_units | |
2853 | = elements / 3; | |
8d749320 SM |
2854 | dwarf2_per_objfile->all_type_units = |
2855 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 2856 | |
673bfd45 | 2857 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2858 | |
2859 | for (i = 0; i < elements; i += 3) | |
2860 | { | |
52dc124a DE |
2861 | struct signatured_type *sig_type; |
2862 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2863 | void **slot; |
2864 | ||
74a0d9f6 JK |
2865 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2866 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2867 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2868 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2869 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2870 | bytes += 3 * 8; | |
2871 | ||
52dc124a | 2872 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2873 | struct signatured_type); |
52dc124a | 2874 | sig_type->signature = signature; |
3019eac3 DE |
2875 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2876 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2877 | sig_type->per_cu.section = section; |
52dc124a DE |
2878 | sig_type->per_cu.offset.sect_off = offset; |
2879 | sig_type->per_cu.objfile = objfile; | |
2880 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2881 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2882 | struct dwarf2_per_cu_quick_data); | |
2883 | ||
52dc124a DE |
2884 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2885 | *slot = sig_type; | |
1fd400ff | 2886 | |
b4dd5633 | 2887 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2888 | } |
2889 | ||
673bfd45 | 2890 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2891 | } |
2892 | ||
9291a0cd TT |
2893 | /* Read the address map data from the mapped index, and use it to |
2894 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2895 | |
9291a0cd TT |
2896 | static void |
2897 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2898 | { | |
3e29f34a | 2899 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd TT |
2900 | const gdb_byte *iter, *end; |
2901 | struct obstack temp_obstack; | |
2902 | struct addrmap *mutable_map; | |
2903 | struct cleanup *cleanup; | |
2904 | CORE_ADDR baseaddr; | |
2905 | ||
2906 | obstack_init (&temp_obstack); | |
2907 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2908 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2909 | ||
2910 | iter = index->address_table; | |
2911 | end = iter + index->address_table_size; | |
2912 | ||
2913 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2914 | ||
2915 | while (iter < end) | |
2916 | { | |
2917 | ULONGEST hi, lo, cu_index; | |
2918 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2919 | iter += 8; | |
2920 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2921 | iter += 8; | |
2922 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2923 | iter += 4; | |
f652bce2 | 2924 | |
24a55014 | 2925 | if (lo > hi) |
f652bce2 | 2926 | { |
24a55014 DE |
2927 | complaint (&symfile_complaints, |
2928 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2929 | hex_string (lo), hex_string (hi)); |
24a55014 | 2930 | continue; |
f652bce2 | 2931 | } |
24a55014 DE |
2932 | |
2933 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2934 | { |
2935 | complaint (&symfile_complaints, | |
2936 | _(".gdb_index address table has invalid CU number %u"), | |
2937 | (unsigned) cu_index); | |
24a55014 | 2938 | continue; |
f652bce2 | 2939 | } |
24a55014 | 2940 | |
3e29f34a MR |
2941 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
2942 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
2943 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
2944 | } |
2945 | ||
2946 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2947 | &objfile->objfile_obstack); | |
2948 | do_cleanups (cleanup); | |
2949 | } | |
2950 | ||
59d7bcaf JK |
2951 | /* The hash function for strings in the mapped index. This is the same as |
2952 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2953 | implementation. This is necessary because the hash function is tied to the | |
2954 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2955 | SYMBOL_HASH_NEXT. |
2956 | ||
2957 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2958 | |
9291a0cd | 2959 | static hashval_t |
559a7a62 | 2960 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2961 | { |
2962 | const unsigned char *str = (const unsigned char *) p; | |
2963 | hashval_t r = 0; | |
2964 | unsigned char c; | |
2965 | ||
2966 | while ((c = *str++) != 0) | |
559a7a62 JK |
2967 | { |
2968 | if (index_version >= 5) | |
2969 | c = tolower (c); | |
2970 | r = r * 67 + c - 113; | |
2971 | } | |
9291a0cd TT |
2972 | |
2973 | return r; | |
2974 | } | |
2975 | ||
2976 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2977 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2978 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2979 | |
9291a0cd TT |
2980 | static int |
2981 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2982 | offset_type **vec_out) | |
2983 | { | |
0cf03b49 JK |
2984 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2985 | offset_type hash; | |
9291a0cd | 2986 | offset_type slot, step; |
559a7a62 | 2987 | int (*cmp) (const char *, const char *); |
9291a0cd | 2988 | |
0cf03b49 JK |
2989 | if (current_language->la_language == language_cplus |
2990 | || current_language->la_language == language_java | |
45280282 IB |
2991 | || current_language->la_language == language_fortran |
2992 | || current_language->la_language == language_d) | |
0cf03b49 JK |
2993 | { |
2994 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2995 | not contain any. */ | |
a8719064 | 2996 | |
72998fb3 | 2997 | if (strchr (name, '(') != NULL) |
0cf03b49 | 2998 | { |
72998fb3 | 2999 | char *without_params = cp_remove_params (name); |
0cf03b49 | 3000 | |
72998fb3 DE |
3001 | if (without_params != NULL) |
3002 | { | |
3003 | make_cleanup (xfree, without_params); | |
3004 | name = without_params; | |
3005 | } | |
0cf03b49 JK |
3006 | } |
3007 | } | |
3008 | ||
559a7a62 | 3009 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3010 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3011 | simulate our NAME being searched is also lowercased. */ |
3012 | hash = mapped_index_string_hash ((index->version == 4 | |
3013 | && case_sensitivity == case_sensitive_off | |
3014 | ? 5 : index->version), | |
3015 | name); | |
3016 | ||
3876f04e DE |
3017 | slot = hash & (index->symbol_table_slots - 1); |
3018 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3019 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3020 | |
3021 | for (;;) | |
3022 | { | |
3023 | /* Convert a slot number to an offset into the table. */ | |
3024 | offset_type i = 2 * slot; | |
3025 | const char *str; | |
3876f04e | 3026 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
3027 | { |
3028 | do_cleanups (back_to); | |
3029 | return 0; | |
3030 | } | |
9291a0cd | 3031 | |
3876f04e | 3032 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3033 | if (!cmp (name, str)) |
9291a0cd TT |
3034 | { |
3035 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3036 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 3037 | do_cleanups (back_to); |
9291a0cd TT |
3038 | return 1; |
3039 | } | |
3040 | ||
3876f04e | 3041 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3042 | } |
3043 | } | |
3044 | ||
2ec9a5e0 TT |
3045 | /* A helper function that reads the .gdb_index from SECTION and fills |
3046 | in MAP. FILENAME is the name of the file containing the section; | |
3047 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3048 | ok to use deprecated sections. | |
3049 | ||
3050 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3051 | out parameters that are filled in with information about the CU and | |
3052 | TU lists in the section. | |
3053 | ||
3054 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3055 | |
9291a0cd | 3056 | static int |
2ec9a5e0 TT |
3057 | read_index_from_section (struct objfile *objfile, |
3058 | const char *filename, | |
3059 | int deprecated_ok, | |
3060 | struct dwarf2_section_info *section, | |
3061 | struct mapped_index *map, | |
3062 | const gdb_byte **cu_list, | |
3063 | offset_type *cu_list_elements, | |
3064 | const gdb_byte **types_list, | |
3065 | offset_type *types_list_elements) | |
9291a0cd | 3066 | { |
948f8e3d | 3067 | const gdb_byte *addr; |
2ec9a5e0 | 3068 | offset_type version; |
b3b272e1 | 3069 | offset_type *metadata; |
1fd400ff | 3070 | int i; |
9291a0cd | 3071 | |
2ec9a5e0 | 3072 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3073 | return 0; |
82430852 JK |
3074 | |
3075 | /* Older elfutils strip versions could keep the section in the main | |
3076 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3077 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3078 | return 0; |
3079 | ||
2ec9a5e0 | 3080 | dwarf2_read_section (objfile, section); |
9291a0cd | 3081 | |
2ec9a5e0 | 3082 | addr = section->buffer; |
9291a0cd | 3083 | /* Version check. */ |
1fd400ff | 3084 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3085 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3086 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3087 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3088 | indices. */ |
831adc1f | 3089 | if (version < 4) |
481860b3 GB |
3090 | { |
3091 | static int warning_printed = 0; | |
3092 | if (!warning_printed) | |
3093 | { | |
3094 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3095 | filename); |
481860b3 GB |
3096 | warning_printed = 1; |
3097 | } | |
3098 | return 0; | |
3099 | } | |
3100 | /* Index version 4 uses a different hash function than index version | |
3101 | 5 and later. | |
3102 | ||
3103 | Versions earlier than 6 did not emit psymbols for inlined | |
3104 | functions. Using these files will cause GDB not to be able to | |
3105 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3106 | indices unless the user has done |
3107 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3108 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3109 | { |
3110 | static int warning_printed = 0; | |
3111 | if (!warning_printed) | |
3112 | { | |
e615022a DE |
3113 | warning (_("\ |
3114 | Skipping deprecated .gdb_index section in %s.\n\ | |
3115 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3116 | to use the section anyway."), | |
2ec9a5e0 | 3117 | filename); |
481860b3 GB |
3118 | warning_printed = 1; |
3119 | } | |
3120 | return 0; | |
3121 | } | |
796a7ff8 | 3122 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3123 | of the TU (for symbols coming from TUs), |
3124 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3125 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3126 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3127 | These are just performance bugs, and we can't distinguish gdb-generated | |
3128 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3129 | |
481860b3 | 3130 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3131 | longer backward compatible. */ |
796a7ff8 | 3132 | if (version > 8) |
594e8718 | 3133 | return 0; |
9291a0cd | 3134 | |
559a7a62 | 3135 | map->version = version; |
2ec9a5e0 | 3136 | map->total_size = section->size; |
9291a0cd TT |
3137 | |
3138 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3139 | |
3140 | i = 0; | |
2ec9a5e0 TT |
3141 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3142 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3143 | / 8); | |
1fd400ff TT |
3144 | ++i; |
3145 | ||
2ec9a5e0 TT |
3146 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3147 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3148 | - MAYBE_SWAP (metadata[i])) | |
3149 | / 8); | |
987d643c | 3150 | ++i; |
1fd400ff TT |
3151 | |
3152 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3153 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3154 | - MAYBE_SWAP (metadata[i])); | |
3155 | ++i; | |
3156 | ||
3876f04e DE |
3157 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3158 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3159 | - MAYBE_SWAP (metadata[i])) | |
3160 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3161 | ++i; |
9291a0cd | 3162 | |
f9d83a0b | 3163 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3164 | |
2ec9a5e0 TT |
3165 | return 1; |
3166 | } | |
3167 | ||
3168 | ||
3169 | /* Read the index file. If everything went ok, initialize the "quick" | |
3170 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3171 | ||
3172 | static int | |
3173 | dwarf2_read_index (struct objfile *objfile) | |
3174 | { | |
3175 | struct mapped_index local_map, *map; | |
3176 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3177 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3178 | struct dwz_file *dwz; |
2ec9a5e0 | 3179 | |
4262abfb | 3180 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3181 | use_deprecated_index_sections, |
3182 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3183 | &cu_list, &cu_list_elements, | |
3184 | &types_list, &types_list_elements)) | |
3185 | return 0; | |
3186 | ||
0fefef59 | 3187 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3188 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3189 | return 0; |
3190 | ||
2ec9a5e0 TT |
3191 | /* If there is a .dwz file, read it so we can get its CU list as |
3192 | well. */ | |
4db1a1dc TT |
3193 | dwz = dwarf2_get_dwz_file (); |
3194 | if (dwz != NULL) | |
2ec9a5e0 | 3195 | { |
2ec9a5e0 TT |
3196 | struct mapped_index dwz_map; |
3197 | const gdb_byte *dwz_types_ignore; | |
3198 | offset_type dwz_types_elements_ignore; | |
3199 | ||
3200 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3201 | 1, | |
3202 | &dwz->gdb_index, &dwz_map, | |
3203 | &dwz_list, &dwz_list_elements, | |
3204 | &dwz_types_ignore, | |
3205 | &dwz_types_elements_ignore)) | |
3206 | { | |
3207 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3208 | bfd_get_filename (dwz->dwz_bfd)); | |
3209 | return 0; | |
3210 | } | |
3211 | } | |
3212 | ||
74a0d9f6 JK |
3213 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3214 | dwz_list_elements); | |
1fd400ff | 3215 | |
8b70b953 TT |
3216 | if (types_list_elements) |
3217 | { | |
3218 | struct dwarf2_section_info *section; | |
3219 | ||
3220 | /* We can only handle a single .debug_types when we have an | |
3221 | index. */ | |
3222 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3223 | return 0; | |
3224 | ||
3225 | section = VEC_index (dwarf2_section_info_def, | |
3226 | dwarf2_per_objfile->types, 0); | |
3227 | ||
74a0d9f6 JK |
3228 | create_signatured_type_table_from_index (objfile, section, types_list, |
3229 | types_list_elements); | |
8b70b953 | 3230 | } |
9291a0cd | 3231 | |
2ec9a5e0 TT |
3232 | create_addrmap_from_index (objfile, &local_map); |
3233 | ||
8d749320 | 3234 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
2ec9a5e0 | 3235 | *map = local_map; |
9291a0cd TT |
3236 | |
3237 | dwarf2_per_objfile->index_table = map; | |
3238 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3239 | dwarf2_per_objfile->quick_file_names_table = |
3240 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3241 | |
3242 | return 1; | |
3243 | } | |
3244 | ||
3245 | /* A helper for the "quick" functions which sets the global | |
3246 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3247 | |
9291a0cd TT |
3248 | static void |
3249 | dw2_setup (struct objfile *objfile) | |
3250 | { | |
9a3c8263 SM |
3251 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3252 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3253 | gdb_assert (dwarf2_per_objfile); |
3254 | } | |
3255 | ||
dee91e82 | 3256 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3257 | |
dee91e82 DE |
3258 | static void |
3259 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3260 | const gdb_byte *info_ptr, |
dee91e82 DE |
3261 | struct die_info *comp_unit_die, |
3262 | int has_children, | |
3263 | void *data) | |
9291a0cd | 3264 | { |
dee91e82 DE |
3265 | struct dwarf2_cu *cu = reader->cu; |
3266 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3267 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3268 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3269 | struct line_header *lh; |
9291a0cd | 3270 | struct attribute *attr; |
dee91e82 | 3271 | int i; |
15d034d0 | 3272 | const char *name, *comp_dir; |
7b9f3c50 DE |
3273 | void **slot; |
3274 | struct quick_file_names *qfn; | |
3275 | unsigned int line_offset; | |
9291a0cd | 3276 | |
0186c6a7 DE |
3277 | gdb_assert (! this_cu->is_debug_types); |
3278 | ||
07261596 TT |
3279 | /* Our callers never want to match partial units -- instead they |
3280 | will match the enclosing full CU. */ | |
3281 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3282 | { | |
3283 | this_cu->v.quick->no_file_data = 1; | |
3284 | return; | |
3285 | } | |
3286 | ||
0186c6a7 | 3287 | lh_cu = this_cu; |
7b9f3c50 DE |
3288 | lh = NULL; |
3289 | slot = NULL; | |
3290 | line_offset = 0; | |
dee91e82 DE |
3291 | |
3292 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3293 | if (attr) |
3294 | { | |
7b9f3c50 DE |
3295 | struct quick_file_names find_entry; |
3296 | ||
3297 | line_offset = DW_UNSND (attr); | |
3298 | ||
3299 | /* We may have already read in this line header (TU line header sharing). | |
3300 | If we have we're done. */ | |
094b34ac DE |
3301 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3302 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3303 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3304 | &find_entry, INSERT); | |
3305 | if (*slot != NULL) | |
3306 | { | |
9a3c8263 | 3307 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3308 | return; |
7b9f3c50 DE |
3309 | } |
3310 | ||
3019eac3 | 3311 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3312 | } |
3313 | if (lh == NULL) | |
3314 | { | |
094b34ac | 3315 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3316 | return; |
9291a0cd TT |
3317 | } |
3318 | ||
8d749320 | 3319 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac DE |
3320 | qfn->hash.dwo_unit = cu->dwo_unit; |
3321 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3322 | gdb_assert (slot != NULL); |
3323 | *slot = qfn; | |
9291a0cd | 3324 | |
dee91e82 | 3325 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3326 | |
7b9f3c50 | 3327 | qfn->num_file_names = lh->num_file_names; |
8d749320 SM |
3328 | qfn->file_names = |
3329 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->num_file_names); | |
9291a0cd | 3330 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3331 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3332 | qfn->real_names = NULL; | |
9291a0cd | 3333 | |
7b9f3c50 | 3334 | free_line_header (lh); |
7b9f3c50 | 3335 | |
094b34ac | 3336 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3337 | } |
3338 | ||
3339 | /* A helper for the "quick" functions which attempts to read the line | |
3340 | table for THIS_CU. */ | |
3341 | ||
3342 | static struct quick_file_names * | |
e4a48d9d | 3343 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3344 | { |
0186c6a7 DE |
3345 | /* This should never be called for TUs. */ |
3346 | gdb_assert (! this_cu->is_debug_types); | |
3347 | /* Nor type unit groups. */ | |
3348 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3349 | |
dee91e82 DE |
3350 | if (this_cu->v.quick->file_names != NULL) |
3351 | return this_cu->v.quick->file_names; | |
3352 | /* If we know there is no line data, no point in looking again. */ | |
3353 | if (this_cu->v.quick->no_file_data) | |
3354 | return NULL; | |
3355 | ||
0186c6a7 | 3356 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3357 | |
3358 | if (this_cu->v.quick->no_file_data) | |
3359 | return NULL; | |
3360 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3361 | } |
3362 | ||
3363 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3364 | real path for a given file name from the line table. */ |
2fdf6df6 | 3365 | |
9291a0cd | 3366 | static const char * |
7b9f3c50 DE |
3367 | dw2_get_real_path (struct objfile *objfile, |
3368 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3369 | { |
7b9f3c50 DE |
3370 | if (qfn->real_names == NULL) |
3371 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3372 | qfn->num_file_names, const char *); |
9291a0cd | 3373 | |
7b9f3c50 DE |
3374 | if (qfn->real_names[index] == NULL) |
3375 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3376 | |
7b9f3c50 | 3377 | return qfn->real_names[index]; |
9291a0cd TT |
3378 | } |
3379 | ||
3380 | static struct symtab * | |
3381 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3382 | { | |
43f3e411 | 3383 | struct compunit_symtab *cust; |
9291a0cd | 3384 | int index; |
ae2de4f8 | 3385 | |
9291a0cd TT |
3386 | dw2_setup (objfile); |
3387 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3388 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3389 | if (cust == NULL) | |
3390 | return NULL; | |
3391 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3392 | } |
3393 | ||
7b9f3c50 DE |
3394 | /* Traversal function for dw2_forget_cached_source_info. */ |
3395 | ||
3396 | static int | |
3397 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3398 | { |
7b9f3c50 | 3399 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3400 | |
7b9f3c50 | 3401 | if (file_data->real_names) |
9291a0cd | 3402 | { |
7b9f3c50 | 3403 | int i; |
9291a0cd | 3404 | |
7b9f3c50 | 3405 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3406 | { |
7b9f3c50 DE |
3407 | xfree ((void*) file_data->real_names[i]); |
3408 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3409 | } |
3410 | } | |
7b9f3c50 DE |
3411 | |
3412 | return 1; | |
3413 | } | |
3414 | ||
3415 | static void | |
3416 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3417 | { | |
3418 | dw2_setup (objfile); | |
3419 | ||
3420 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3421 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3422 | } |
3423 | ||
f8eba3c6 TT |
3424 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3425 | the symtabs and calls the iterator. */ | |
3426 | ||
3427 | static int | |
3428 | dw2_map_expand_apply (struct objfile *objfile, | |
3429 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3430 | const char *name, const char *real_path, |
f8eba3c6 TT |
3431 | int (*callback) (struct symtab *, void *), |
3432 | void *data) | |
3433 | { | |
43f3e411 | 3434 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3435 | |
3436 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3437 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3438 | return 0; |
3439 | ||
3440 | /* This may expand more than one symtab, and we want to iterate over | |
3441 | all of them. */ | |
a0f42c21 | 3442 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3443 | |
f5b95b50 | 3444 | return iterate_over_some_symtabs (name, real_path, callback, data, |
43f3e411 | 3445 | objfile->compunit_symtabs, last_made); |
f8eba3c6 TT |
3446 | } |
3447 | ||
3448 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3449 | ||
9291a0cd | 3450 | static int |
f8eba3c6 | 3451 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3452 | const char *real_path, |
f8eba3c6 TT |
3453 | int (*callback) (struct symtab *, void *), |
3454 | void *data) | |
9291a0cd TT |
3455 | { |
3456 | int i; | |
c011a4f4 | 3457 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3458 | |
3459 | dw2_setup (objfile); | |
ae2de4f8 | 3460 | |
848e3e78 DE |
3461 | /* The rule is CUs specify all the files, including those used by |
3462 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3463 | |
848e3e78 | 3464 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3465 | { |
3466 | int j; | |
8832e7e3 | 3467 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3468 | struct quick_file_names *file_data; |
9291a0cd | 3469 | |
3d7bb9d9 | 3470 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3471 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3472 | continue; |
3473 | ||
e4a48d9d | 3474 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3475 | if (file_data == NULL) |
9291a0cd TT |
3476 | continue; |
3477 | ||
7b9f3c50 | 3478 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3479 | { |
7b9f3c50 | 3480 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3481 | const char *this_real_name; |
9291a0cd | 3482 | |
af529f8f | 3483 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3484 | { |
f5b95b50 | 3485 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3486 | callback, data)) |
3487 | return 1; | |
288e77a7 | 3488 | continue; |
4aac40c8 | 3489 | } |
9291a0cd | 3490 | |
c011a4f4 DE |
3491 | /* Before we invoke realpath, which can get expensive when many |
3492 | files are involved, do a quick comparison of the basenames. */ | |
3493 | if (! basenames_may_differ | |
3494 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3495 | continue; | |
3496 | ||
da235a7c JK |
3497 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3498 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3499 | { |
da235a7c JK |
3500 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3501 | callback, data)) | |
3502 | return 1; | |
288e77a7 | 3503 | continue; |
da235a7c | 3504 | } |
9291a0cd | 3505 | |
da235a7c JK |
3506 | if (real_path != NULL) |
3507 | { | |
af529f8f JK |
3508 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3509 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3510 | if (this_real_name != NULL |
af529f8f | 3511 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3512 | { |
f5b95b50 | 3513 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3514 | callback, data)) |
3515 | return 1; | |
288e77a7 | 3516 | continue; |
9291a0cd TT |
3517 | } |
3518 | } | |
3519 | } | |
3520 | } | |
3521 | ||
9291a0cd TT |
3522 | return 0; |
3523 | } | |
3524 | ||
da51c347 DE |
3525 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3526 | ||
3527 | struct dw2_symtab_iterator | |
9291a0cd | 3528 | { |
da51c347 DE |
3529 | /* The internalized form of .gdb_index. */ |
3530 | struct mapped_index *index; | |
3531 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3532 | int want_specific_block; | |
3533 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3534 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3535 | int block_index; | |
3536 | /* The kind of symbol we're looking for. */ | |
3537 | domain_enum domain; | |
3538 | /* The list of CUs from the index entry of the symbol, | |
3539 | or NULL if not found. */ | |
3540 | offset_type *vec; | |
3541 | /* The next element in VEC to look at. */ | |
3542 | int next; | |
3543 | /* The number of elements in VEC, or zero if there is no match. */ | |
3544 | int length; | |
8943b874 DE |
3545 | /* Have we seen a global version of the symbol? |
3546 | If so we can ignore all further global instances. | |
3547 | This is to work around gold/15646, inefficient gold-generated | |
3548 | indices. */ | |
3549 | int global_seen; | |
da51c347 | 3550 | }; |
9291a0cd | 3551 | |
da51c347 DE |
3552 | /* Initialize the index symtab iterator ITER. |
3553 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3554 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3555 | |
9291a0cd | 3556 | static void |
da51c347 DE |
3557 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3558 | struct mapped_index *index, | |
3559 | int want_specific_block, | |
3560 | int block_index, | |
3561 | domain_enum domain, | |
3562 | const char *name) | |
3563 | { | |
3564 | iter->index = index; | |
3565 | iter->want_specific_block = want_specific_block; | |
3566 | iter->block_index = block_index; | |
3567 | iter->domain = domain; | |
3568 | iter->next = 0; | |
8943b874 | 3569 | iter->global_seen = 0; |
da51c347 DE |
3570 | |
3571 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3572 | iter->length = MAYBE_SWAP (*iter->vec); | |
3573 | else | |
3574 | { | |
3575 | iter->vec = NULL; | |
3576 | iter->length = 0; | |
3577 | } | |
3578 | } | |
3579 | ||
3580 | /* Return the next matching CU or NULL if there are no more. */ | |
3581 | ||
3582 | static struct dwarf2_per_cu_data * | |
3583 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3584 | { | |
3585 | for ( ; iter->next < iter->length; ++iter->next) | |
3586 | { | |
3587 | offset_type cu_index_and_attrs = | |
3588 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3589 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3590 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3591 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3592 | /* This value is only valid for index versions >= 7. */ | |
3593 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3594 | gdb_index_symbol_kind symbol_kind = | |
3595 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3596 | /* Only check the symbol attributes if they're present. | |
3597 | Indices prior to version 7 don't record them, | |
3598 | and indices >= 7 may elide them for certain symbols | |
3599 | (gold does this). */ | |
3600 | int attrs_valid = | |
3601 | (iter->index->version >= 7 | |
3602 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3603 | ||
3190f0c6 DE |
3604 | /* Don't crash on bad data. */ |
3605 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3606 | + dwarf2_per_objfile->n_type_units)) | |
3607 | { | |
3608 | complaint (&symfile_complaints, | |
3609 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3610 | " [in module %s]"), |
3611 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3612 | continue; |
3613 | } | |
3614 | ||
8832e7e3 | 3615 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3616 | |
da51c347 | 3617 | /* Skip if already read in. */ |
43f3e411 | 3618 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3619 | continue; |
3620 | ||
8943b874 DE |
3621 | /* Check static vs global. */ |
3622 | if (attrs_valid) | |
3623 | { | |
3624 | if (iter->want_specific_block | |
3625 | && want_static != is_static) | |
3626 | continue; | |
3627 | /* Work around gold/15646. */ | |
3628 | if (!is_static && iter->global_seen) | |
3629 | continue; | |
3630 | if (!is_static) | |
3631 | iter->global_seen = 1; | |
3632 | } | |
da51c347 DE |
3633 | |
3634 | /* Only check the symbol's kind if it has one. */ | |
3635 | if (attrs_valid) | |
3636 | { | |
3637 | switch (iter->domain) | |
3638 | { | |
3639 | case VAR_DOMAIN: | |
3640 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3641 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3642 | /* Some types are also in VAR_DOMAIN. */ | |
3643 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3644 | continue; | |
3645 | break; | |
3646 | case STRUCT_DOMAIN: | |
3647 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3648 | continue; | |
3649 | break; | |
3650 | case LABEL_DOMAIN: | |
3651 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3652 | continue; | |
3653 | break; | |
3654 | default: | |
3655 | break; | |
3656 | } | |
3657 | } | |
3658 | ||
3659 | ++iter->next; | |
3660 | return per_cu; | |
3661 | } | |
3662 | ||
3663 | return NULL; | |
3664 | } | |
3665 | ||
43f3e411 | 3666 | static struct compunit_symtab * |
da51c347 DE |
3667 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3668 | const char *name, domain_enum domain) | |
9291a0cd | 3669 | { |
43f3e411 | 3670 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3671 | struct mapped_index *index; |
3672 | ||
9291a0cd TT |
3673 | dw2_setup (objfile); |
3674 | ||
156942c7 DE |
3675 | index = dwarf2_per_objfile->index_table; |
3676 | ||
da51c347 | 3677 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3678 | if (index) |
9291a0cd | 3679 | { |
da51c347 DE |
3680 | struct dw2_symtab_iterator iter; |
3681 | struct dwarf2_per_cu_data *per_cu; | |
3682 | ||
3683 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3684 | |
da51c347 | 3685 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3686 | { |
b2e2f908 | 3687 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3688 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3689 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3690 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3691 | |
b2e2f908 DE |
3692 | sym = block_find_symbol (block, name, domain, |
3693 | block_find_non_opaque_type_preferred, | |
3694 | &with_opaque); | |
3695 | ||
da51c347 DE |
3696 | /* Some caution must be observed with overloaded functions |
3697 | and methods, since the index will not contain any overload | |
3698 | information (but NAME might contain it). */ | |
da51c347 | 3699 | |
b2e2f908 DE |
3700 | if (sym != NULL |
3701 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
3702 | return stab; | |
3703 | if (with_opaque != NULL | |
3704 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
3705 | stab_best = stab; | |
da51c347 DE |
3706 | |
3707 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3708 | } |
3709 | } | |
9291a0cd | 3710 | |
da51c347 | 3711 | return stab_best; |
9291a0cd TT |
3712 | } |
3713 | ||
3714 | static void | |
3715 | dw2_print_stats (struct objfile *objfile) | |
3716 | { | |
e4a48d9d | 3717 | int i, total, count; |
9291a0cd TT |
3718 | |
3719 | dw2_setup (objfile); | |
e4a48d9d | 3720 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3721 | count = 0; |
e4a48d9d | 3722 | for (i = 0; i < total; ++i) |
9291a0cd | 3723 | { |
8832e7e3 | 3724 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3725 | |
43f3e411 | 3726 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3727 | ++count; |
3728 | } | |
e4a48d9d | 3729 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3730 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3731 | } | |
3732 | ||
779bd270 DE |
3733 | /* This dumps minimal information about the index. |
3734 | It is called via "mt print objfiles". | |
3735 | One use is to verify .gdb_index has been loaded by the | |
3736 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3737 | ||
9291a0cd TT |
3738 | static void |
3739 | dw2_dump (struct objfile *objfile) | |
3740 | { | |
779bd270 DE |
3741 | dw2_setup (objfile); |
3742 | gdb_assert (dwarf2_per_objfile->using_index); | |
3743 | printf_filtered (".gdb_index:"); | |
3744 | if (dwarf2_per_objfile->index_table != NULL) | |
3745 | { | |
3746 | printf_filtered (" version %d\n", | |
3747 | dwarf2_per_objfile->index_table->version); | |
3748 | } | |
3749 | else | |
3750 | printf_filtered (" faked for \"readnow\"\n"); | |
3751 | printf_filtered ("\n"); | |
9291a0cd TT |
3752 | } |
3753 | ||
3754 | static void | |
3189cb12 DE |
3755 | dw2_relocate (struct objfile *objfile, |
3756 | const struct section_offsets *new_offsets, | |
3757 | const struct section_offsets *delta) | |
9291a0cd TT |
3758 | { |
3759 | /* There's nothing to relocate here. */ | |
3760 | } | |
3761 | ||
3762 | static void | |
3763 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3764 | const char *func_name) | |
3765 | { | |
da51c347 DE |
3766 | struct mapped_index *index; |
3767 | ||
3768 | dw2_setup (objfile); | |
3769 | ||
3770 | index = dwarf2_per_objfile->index_table; | |
3771 | ||
3772 | /* index is NULL if OBJF_READNOW. */ | |
3773 | if (index) | |
3774 | { | |
3775 | struct dw2_symtab_iterator iter; | |
3776 | struct dwarf2_per_cu_data *per_cu; | |
3777 | ||
3778 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3779 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3780 | func_name); | |
3781 | ||
3782 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3783 | dw2_instantiate_symtab (per_cu); | |
3784 | } | |
9291a0cd TT |
3785 | } |
3786 | ||
3787 | static void | |
3788 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3789 | { | |
3790 | int i; | |
3791 | ||
3792 | dw2_setup (objfile); | |
1fd400ff TT |
3793 | |
3794 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3795 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3796 | { |
8832e7e3 | 3797 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3798 | |
a0f42c21 | 3799 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3800 | } |
3801 | } | |
3802 | ||
3803 | static void | |
652a8996 JK |
3804 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3805 | const char *fullname) | |
9291a0cd TT |
3806 | { |
3807 | int i; | |
3808 | ||
3809 | dw2_setup (objfile); | |
d4637a04 DE |
3810 | |
3811 | /* We don't need to consider type units here. | |
3812 | This is only called for examining code, e.g. expand_line_sal. | |
3813 | There can be an order of magnitude (or more) more type units | |
3814 | than comp units, and we avoid them if we can. */ | |
3815 | ||
3816 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3817 | { |
3818 | int j; | |
8832e7e3 | 3819 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 3820 | struct quick_file_names *file_data; |
9291a0cd | 3821 | |
3d7bb9d9 | 3822 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3823 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3824 | continue; |
3825 | ||
e4a48d9d | 3826 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3827 | if (file_data == NULL) |
9291a0cd TT |
3828 | continue; |
3829 | ||
7b9f3c50 | 3830 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3831 | { |
652a8996 JK |
3832 | const char *this_fullname = file_data->file_names[j]; |
3833 | ||
3834 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3835 | { |
a0f42c21 | 3836 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3837 | break; |
3838 | } | |
3839 | } | |
3840 | } | |
3841 | } | |
3842 | ||
9291a0cd | 3843 | static void |
ade7ed9e | 3844 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 3845 | const char * name, domain_enum domain, |
ade7ed9e | 3846 | int global, |
40658b94 PH |
3847 | int (*callback) (struct block *, |
3848 | struct symbol *, void *), | |
2edb89d3 JK |
3849 | void *data, symbol_compare_ftype *match, |
3850 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3851 | { |
40658b94 | 3852 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3853 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3854 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3855 | } |
3856 | ||
3857 | static void | |
f8eba3c6 TT |
3858 | dw2_expand_symtabs_matching |
3859 | (struct objfile *objfile, | |
206f2a57 DE |
3860 | expand_symtabs_file_matcher_ftype *file_matcher, |
3861 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, | |
276d885b | 3862 | expand_symtabs_exp_notify_ftype *expansion_notify, |
f8eba3c6 TT |
3863 | enum search_domain kind, |
3864 | void *data) | |
9291a0cd TT |
3865 | { |
3866 | int i; | |
3867 | offset_type iter; | |
4b5246aa | 3868 | struct mapped_index *index; |
9291a0cd TT |
3869 | |
3870 | dw2_setup (objfile); | |
ae2de4f8 DE |
3871 | |
3872 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3873 | if (!dwarf2_per_objfile->index_table) |
3874 | return; | |
4b5246aa | 3875 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3876 | |
7b08b9eb | 3877 | if (file_matcher != NULL) |
24c79950 TT |
3878 | { |
3879 | struct cleanup *cleanup; | |
3880 | htab_t visited_found, visited_not_found; | |
3881 | ||
3882 | visited_found = htab_create_alloc (10, | |
3883 | htab_hash_pointer, htab_eq_pointer, | |
3884 | NULL, xcalloc, xfree); | |
3885 | cleanup = make_cleanup_htab_delete (visited_found); | |
3886 | visited_not_found = htab_create_alloc (10, | |
3887 | htab_hash_pointer, htab_eq_pointer, | |
3888 | NULL, xcalloc, xfree); | |
3889 | make_cleanup_htab_delete (visited_not_found); | |
3890 | ||
848e3e78 DE |
3891 | /* The rule is CUs specify all the files, including those used by |
3892 | any TU, so there's no need to scan TUs here. */ | |
3893 | ||
3894 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3895 | { |
3896 | int j; | |
8832e7e3 | 3897 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
3898 | struct quick_file_names *file_data; |
3899 | void **slot; | |
7b08b9eb | 3900 | |
61d96d7e DE |
3901 | QUIT; |
3902 | ||
24c79950 | 3903 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3904 | |
24c79950 | 3905 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3906 | if (per_cu->v.quick->compunit_symtab) |
24c79950 | 3907 | continue; |
7b08b9eb | 3908 | |
e4a48d9d | 3909 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3910 | if (file_data == NULL) |
3911 | continue; | |
7b08b9eb | 3912 | |
24c79950 TT |
3913 | if (htab_find (visited_not_found, file_data) != NULL) |
3914 | continue; | |
3915 | else if (htab_find (visited_found, file_data) != NULL) | |
3916 | { | |
3917 | per_cu->v.quick->mark = 1; | |
3918 | continue; | |
3919 | } | |
3920 | ||
3921 | for (j = 0; j < file_data->num_file_names; ++j) | |
3922 | { | |
da235a7c JK |
3923 | const char *this_real_name; |
3924 | ||
fbd9ab74 | 3925 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3926 | { |
3927 | per_cu->v.quick->mark = 1; | |
3928 | break; | |
3929 | } | |
da235a7c JK |
3930 | |
3931 | /* Before we invoke realpath, which can get expensive when many | |
3932 | files are involved, do a quick comparison of the basenames. */ | |
3933 | if (!basenames_may_differ | |
3934 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3935 | data, 1)) | |
3936 | continue; | |
3937 | ||
3938 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3939 | if (file_matcher (this_real_name, data, 0)) | |
3940 | { | |
3941 | per_cu->v.quick->mark = 1; | |
3942 | break; | |
3943 | } | |
24c79950 TT |
3944 | } |
3945 | ||
3946 | slot = htab_find_slot (per_cu->v.quick->mark | |
3947 | ? visited_found | |
3948 | : visited_not_found, | |
3949 | file_data, INSERT); | |
3950 | *slot = file_data; | |
3951 | } | |
3952 | ||
3953 | do_cleanups (cleanup); | |
3954 | } | |
9291a0cd | 3955 | |
3876f04e | 3956 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3957 | { |
3958 | offset_type idx = 2 * iter; | |
3959 | const char *name; | |
3960 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 3961 | int global_seen = 0; |
9291a0cd | 3962 | |
61d96d7e DE |
3963 | QUIT; |
3964 | ||
3876f04e | 3965 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3966 | continue; |
3967 | ||
3876f04e | 3968 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3969 | |
206f2a57 | 3970 | if (! (*symbol_matcher) (name, data)) |
9291a0cd TT |
3971 | continue; |
3972 | ||
3973 | /* The name was matched, now expand corresponding CUs that were | |
3974 | marked. */ | |
4b5246aa | 3975 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3976 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3977 | vec_len = MAYBE_SWAP (vec[0]); |
3978 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3979 | { | |
e254ef6a | 3980 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 3981 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
3982 | /* This value is only valid for index versions >= 7. */ |
3983 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
3984 | gdb_index_symbol_kind symbol_kind = |
3985 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3986 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
3987 | /* Only check the symbol attributes if they're present. |
3988 | Indices prior to version 7 don't record them, | |
3989 | and indices >= 7 may elide them for certain symbols | |
3990 | (gold does this). */ | |
3991 | int attrs_valid = | |
3992 | (index->version >= 7 | |
3993 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3994 | ||
8943b874 DE |
3995 | /* Work around gold/15646. */ |
3996 | if (attrs_valid) | |
3997 | { | |
3998 | if (!is_static && global_seen) | |
3999 | continue; | |
4000 | if (!is_static) | |
4001 | global_seen = 1; | |
4002 | } | |
4003 | ||
3190f0c6 DE |
4004 | /* Only check the symbol's kind if it has one. */ |
4005 | if (attrs_valid) | |
156942c7 DE |
4006 | { |
4007 | switch (kind) | |
4008 | { | |
4009 | case VARIABLES_DOMAIN: | |
4010 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4011 | continue; | |
4012 | break; | |
4013 | case FUNCTIONS_DOMAIN: | |
4014 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
4015 | continue; | |
4016 | break; | |
4017 | case TYPES_DOMAIN: | |
4018 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4019 | continue; | |
4020 | break; | |
4021 | default: | |
4022 | break; | |
4023 | } | |
4024 | } | |
4025 | ||
3190f0c6 DE |
4026 | /* Don't crash on bad data. */ |
4027 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4028 | + dwarf2_per_objfile->n_type_units)) | |
4029 | { | |
4030 | complaint (&symfile_complaints, | |
4031 | _(".gdb_index entry has bad CU index" | |
4262abfb | 4032 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
4033 | continue; |
4034 | } | |
4035 | ||
8832e7e3 | 4036 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 4037 | if (file_matcher == NULL || per_cu->v.quick->mark) |
276d885b GB |
4038 | { |
4039 | int symtab_was_null = | |
4040 | (per_cu->v.quick->compunit_symtab == NULL); | |
4041 | ||
4042 | dw2_instantiate_symtab (per_cu); | |
4043 | ||
4044 | if (expansion_notify != NULL | |
4045 | && symtab_was_null | |
4046 | && per_cu->v.quick->compunit_symtab != NULL) | |
4047 | { | |
4048 | expansion_notify (per_cu->v.quick->compunit_symtab, | |
4049 | data); | |
4050 | } | |
4051 | } | |
9291a0cd TT |
4052 | } |
4053 | } | |
4054 | } | |
4055 | ||
43f3e411 | 4056 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4057 | symtab. */ |
4058 | ||
43f3e411 DE |
4059 | static struct compunit_symtab * |
4060 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4061 | CORE_ADDR pc) | |
9703b513 TT |
4062 | { |
4063 | int i; | |
4064 | ||
43f3e411 DE |
4065 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4066 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4067 | return cust; | |
9703b513 | 4068 | |
43f3e411 | 4069 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4070 | return NULL; |
4071 | ||
43f3e411 | 4072 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4073 | { |
43f3e411 | 4074 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4075 | |
43f3e411 | 4076 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4077 | if (s != NULL) |
4078 | return s; | |
4079 | } | |
4080 | ||
4081 | return NULL; | |
4082 | } | |
4083 | ||
43f3e411 DE |
4084 | static struct compunit_symtab * |
4085 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4086 | struct bound_minimal_symbol msymbol, | |
4087 | CORE_ADDR pc, | |
4088 | struct obj_section *section, | |
4089 | int warn_if_readin) | |
9291a0cd TT |
4090 | { |
4091 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4092 | struct compunit_symtab *result; |
9291a0cd TT |
4093 | |
4094 | dw2_setup (objfile); | |
4095 | ||
4096 | if (!objfile->psymtabs_addrmap) | |
4097 | return NULL; | |
4098 | ||
9a3c8263 SM |
4099 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4100 | pc); | |
9291a0cd TT |
4101 | if (!data) |
4102 | return NULL; | |
4103 | ||
43f3e411 | 4104 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4105 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4106 | paddress (get_objfile_arch (objfile), pc)); |
4107 | ||
43f3e411 DE |
4108 | result |
4109 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4110 | pc); | |
9703b513 TT |
4111 | gdb_assert (result != NULL); |
4112 | return result; | |
9291a0cd TT |
4113 | } |
4114 | ||
9291a0cd | 4115 | static void |
44b13c5a | 4116 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4117 | void *data, int need_fullname) |
9291a0cd TT |
4118 | { |
4119 | int i; | |
24c79950 TT |
4120 | struct cleanup *cleanup; |
4121 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
4122 | NULL, xcalloc, xfree); | |
9291a0cd | 4123 | |
24c79950 | 4124 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 4125 | dw2_setup (objfile); |
ae2de4f8 | 4126 | |
848e3e78 DE |
4127 | /* The rule is CUs specify all the files, including those used by |
4128 | any TU, so there's no need to scan TUs here. | |
4129 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 4130 | |
848e3e78 | 4131 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 | 4132 | { |
8832e7e3 | 4133 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
24c79950 | 4134 | |
43f3e411 | 4135 | if (per_cu->v.quick->compunit_symtab) |
24c79950 TT |
4136 | { |
4137 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
4138 | INSERT); | |
4139 | ||
4140 | *slot = per_cu->v.quick->file_names; | |
4141 | } | |
4142 | } | |
4143 | ||
848e3e78 | 4144 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4145 | { |
4146 | int j; | |
8832e7e3 | 4147 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 4148 | struct quick_file_names *file_data; |
24c79950 | 4149 | void **slot; |
9291a0cd | 4150 | |
3d7bb9d9 | 4151 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4152 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4153 | continue; |
4154 | ||
e4a48d9d | 4155 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4156 | if (file_data == NULL) |
9291a0cd TT |
4157 | continue; |
4158 | ||
24c79950 TT |
4159 | slot = htab_find_slot (visited, file_data, INSERT); |
4160 | if (*slot) | |
4161 | { | |
4162 | /* Already visited. */ | |
4163 | continue; | |
4164 | } | |
4165 | *slot = file_data; | |
4166 | ||
7b9f3c50 | 4167 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4168 | { |
74e2f255 DE |
4169 | const char *this_real_name; |
4170 | ||
4171 | if (need_fullname) | |
4172 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4173 | else | |
4174 | this_real_name = NULL; | |
7b9f3c50 | 4175 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
4176 | } |
4177 | } | |
24c79950 TT |
4178 | |
4179 | do_cleanups (cleanup); | |
9291a0cd TT |
4180 | } |
4181 | ||
4182 | static int | |
4183 | dw2_has_symbols (struct objfile *objfile) | |
4184 | { | |
4185 | return 1; | |
4186 | } | |
4187 | ||
4188 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4189 | { | |
4190 | dw2_has_symbols, | |
4191 | dw2_find_last_source_symtab, | |
4192 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4193 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4194 | dw2_lookup_symbol, |
9291a0cd TT |
4195 | dw2_print_stats, |
4196 | dw2_dump, | |
4197 | dw2_relocate, | |
4198 | dw2_expand_symtabs_for_function, | |
4199 | dw2_expand_all_symtabs, | |
652a8996 | 4200 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4201 | dw2_map_matching_symbols, |
9291a0cd | 4202 | dw2_expand_symtabs_matching, |
43f3e411 | 4203 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4204 | dw2_map_symbol_filenames |
4205 | }; | |
4206 | ||
4207 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4208 | file will use psymtabs, or 1 if using the GNU index. */ | |
4209 | ||
4210 | int | |
4211 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4212 | { | |
4213 | /* If we're about to read full symbols, don't bother with the | |
4214 | indices. In this case we also don't care if some other debug | |
4215 | format is making psymtabs, because they are all about to be | |
4216 | expanded anyway. */ | |
4217 | if ((objfile->flags & OBJF_READNOW)) | |
4218 | { | |
4219 | int i; | |
4220 | ||
4221 | dwarf2_per_objfile->using_index = 1; | |
4222 | create_all_comp_units (objfile); | |
0e50663e | 4223 | create_all_type_units (objfile); |
7b9f3c50 DE |
4224 | dwarf2_per_objfile->quick_file_names_table = |
4225 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4226 | |
1fd400ff | 4227 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4228 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4229 | { |
8832e7e3 | 4230 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4231 | |
e254ef6a DE |
4232 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4233 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4234 | } |
4235 | ||
4236 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4237 | these functions will be no-ops because we will have expanded | |
4238 | all symtabs. */ | |
4239 | return 1; | |
4240 | } | |
4241 | ||
4242 | if (dwarf2_read_index (objfile)) | |
4243 | return 1; | |
4244 | ||
9291a0cd TT |
4245 | return 0; |
4246 | } | |
4247 | ||
4248 | \f | |
4249 | ||
dce234bc PP |
4250 | /* Build a partial symbol table. */ |
4251 | ||
4252 | void | |
f29dff0a | 4253 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4254 | { |
c9bf0622 | 4255 | |
f29dff0a | 4256 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4257 | { |
4258 | init_psymbol_list (objfile, 1024); | |
4259 | } | |
4260 | ||
492d29ea | 4261 | TRY |
c9bf0622 TT |
4262 | { |
4263 | /* This isn't really ideal: all the data we allocate on the | |
4264 | objfile's obstack is still uselessly kept around. However, | |
4265 | freeing it seems unsafe. */ | |
4266 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
4267 | ||
4268 | dwarf2_build_psymtabs_hard (objfile); | |
4269 | discard_cleanups (cleanups); | |
4270 | } | |
492d29ea PA |
4271 | CATCH (except, RETURN_MASK_ERROR) |
4272 | { | |
4273 | exception_print (gdb_stderr, except); | |
4274 | } | |
4275 | END_CATCH | |
c906108c | 4276 | } |
c906108c | 4277 | |
1ce1cefd DE |
4278 | /* Return the total length of the CU described by HEADER. */ |
4279 | ||
4280 | static unsigned int | |
4281 | get_cu_length (const struct comp_unit_head *header) | |
4282 | { | |
4283 | return header->initial_length_size + header->length; | |
4284 | } | |
4285 | ||
45452591 DE |
4286 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
4287 | ||
4288 | static inline int | |
b64f50a1 | 4289 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 4290 | { |
b64f50a1 | 4291 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 4292 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 4293 | |
b64f50a1 | 4294 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
4295 | } |
4296 | ||
3b80fe9b DE |
4297 | /* Find the base address of the compilation unit for range lists and |
4298 | location lists. It will normally be specified by DW_AT_low_pc. | |
4299 | In DWARF-3 draft 4, the base address could be overridden by | |
4300 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4301 | compilation units with discontinuous ranges. */ | |
4302 | ||
4303 | static void | |
4304 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4305 | { | |
4306 | struct attribute *attr; | |
4307 | ||
4308 | cu->base_known = 0; | |
4309 | cu->base_address = 0; | |
4310 | ||
4311 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4312 | if (attr) | |
4313 | { | |
31aa7e4e | 4314 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4315 | cu->base_known = 1; |
4316 | } | |
4317 | else | |
4318 | { | |
4319 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4320 | if (attr) | |
4321 | { | |
31aa7e4e | 4322 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4323 | cu->base_known = 1; |
4324 | } | |
4325 | } | |
4326 | } | |
4327 | ||
93311388 DE |
4328 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4329 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4330 | by the caller. */ | |
107d2387 | 4331 | |
d521ce57 | 4332 | static const gdb_byte * |
107d2387 | 4333 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4334 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4335 | { |
4336 | int signed_addr; | |
891d2f0b | 4337 | unsigned int bytes_read; |
c764a876 DE |
4338 | |
4339 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4340 | cu_header->initial_length_size = bytes_read; | |
4341 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4342 | info_ptr += bytes_read; |
107d2387 AC |
4343 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4344 | info_ptr += 2; | |
b64f50a1 JK |
4345 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4346 | &bytes_read); | |
613e1657 | 4347 | info_ptr += bytes_read; |
107d2387 AC |
4348 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4349 | info_ptr += 1; | |
4350 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4351 | if (signed_addr < 0) | |
8e65ff28 | 4352 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4353 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4354 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4355 | |
107d2387 AC |
4356 | return info_ptr; |
4357 | } | |
4358 | ||
36586728 TT |
4359 | /* Helper function that returns the proper abbrev section for |
4360 | THIS_CU. */ | |
4361 | ||
4362 | static struct dwarf2_section_info * | |
4363 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4364 | { | |
4365 | struct dwarf2_section_info *abbrev; | |
4366 | ||
4367 | if (this_cu->is_dwz) | |
4368 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4369 | else | |
4370 | abbrev = &dwarf2_per_objfile->abbrev; | |
4371 | ||
4372 | return abbrev; | |
4373 | } | |
4374 | ||
9ff913ba DE |
4375 | /* Subroutine of read_and_check_comp_unit_head and |
4376 | read_and_check_type_unit_head to simplify them. | |
4377 | Perform various error checking on the header. */ | |
4378 | ||
4379 | static void | |
4380 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4381 | struct dwarf2_section_info *section, |
4382 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4383 | { |
a32a8923 DE |
4384 | bfd *abfd = get_section_bfd_owner (section); |
4385 | const char *filename = get_section_file_name (section); | |
9ff913ba DE |
4386 | |
4387 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4388 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4389 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4390 | filename); | |
4391 | ||
b64f50a1 | 4392 | if (header->abbrev_offset.sect_off |
36586728 | 4393 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4394 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4395 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4396 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4397 | filename); |
4398 | ||
4399 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4400 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4401 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4402 | > section->size) |
4403 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4404 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4405 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4406 | filename); |
4407 | } | |
4408 | ||
4409 | /* Read in a CU/TU header and perform some basic error checking. | |
4410 | The contents of the header are stored in HEADER. | |
4411 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4412 | |
d521ce57 | 4413 | static const gdb_byte * |
9ff913ba DE |
4414 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4415 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4416 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4417 | const gdb_byte *info_ptr, |
9ff913ba | 4418 | int is_debug_types_section) |
72bf9492 | 4419 | { |
d521ce57 | 4420 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4421 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4422 | |
b64f50a1 | 4423 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4424 | |
72bf9492 DJ |
4425 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4426 | ||
460c1c54 CC |
4427 | /* If we're reading a type unit, skip over the signature and |
4428 | type_offset fields. */ | |
b0df02fd | 4429 | if (is_debug_types_section) |
460c1c54 CC |
4430 | info_ptr += 8 /*signature*/ + header->offset_size; |
4431 | ||
b64f50a1 | 4432 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4433 | |
4bdcc0c1 | 4434 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4435 | |
4436 | return info_ptr; | |
4437 | } | |
4438 | ||
348e048f DE |
4439 | /* Read in the types comp unit header information from .debug_types entry at |
4440 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4441 | ||
d521ce57 | 4442 | static const gdb_byte * |
9ff913ba DE |
4443 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4444 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4445 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4446 | const gdb_byte *info_ptr, |
dee91e82 DE |
4447 | ULONGEST *signature, |
4448 | cu_offset *type_offset_in_tu) | |
348e048f | 4449 | { |
d521ce57 | 4450 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4451 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4452 | |
b64f50a1 | 4453 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4454 | |
9ff913ba | 4455 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4456 | |
9ff913ba DE |
4457 | /* If we're reading a type unit, skip over the signature and |
4458 | type_offset fields. */ | |
4459 | if (signature != NULL) | |
4460 | *signature = read_8_bytes (abfd, info_ptr); | |
4461 | info_ptr += 8; | |
dee91e82 DE |
4462 | if (type_offset_in_tu != NULL) |
4463 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4464 | header->offset_size); | |
9ff913ba DE |
4465 | info_ptr += header->offset_size; |
4466 | ||
b64f50a1 | 4467 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4468 | |
4bdcc0c1 | 4469 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4470 | |
4471 | return info_ptr; | |
348e048f DE |
4472 | } |
4473 | ||
f4dc4d17 DE |
4474 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4475 | ||
4476 | static sect_offset | |
4477 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4478 | sect_offset offset) | |
4479 | { | |
a32a8923 | 4480 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4481 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4482 | unsigned int length, initial_length_size, offset_size; |
4483 | sect_offset abbrev_offset; | |
4484 | ||
4485 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4486 | info_ptr = section->buffer + offset.sect_off; | |
4487 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4488 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4489 | info_ptr += initial_length_size + 2 /*version*/; | |
4490 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4491 | return abbrev_offset; | |
4492 | } | |
4493 | ||
aaa75496 JB |
4494 | /* Allocate a new partial symtab for file named NAME and mark this new |
4495 | partial symtab as being an include of PST. */ | |
4496 | ||
4497 | static void | |
d521ce57 | 4498 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4499 | struct objfile *objfile) |
4500 | { | |
4501 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4502 | ||
fbd9ab74 JK |
4503 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4504 | { | |
4505 | /* It shares objfile->objfile_obstack. */ | |
4506 | subpst->dirname = pst->dirname; | |
4507 | } | |
4508 | ||
aaa75496 JB |
4509 | subpst->textlow = 0; |
4510 | subpst->texthigh = 0; | |
4511 | ||
8d749320 SM |
4512 | subpst->dependencies |
4513 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
4514 | subpst->dependencies[0] = pst; |
4515 | subpst->number_of_dependencies = 1; | |
4516 | ||
4517 | subpst->globals_offset = 0; | |
4518 | subpst->n_global_syms = 0; | |
4519 | subpst->statics_offset = 0; | |
4520 | subpst->n_static_syms = 0; | |
43f3e411 | 4521 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
4522 | subpst->read_symtab = pst->read_symtab; |
4523 | subpst->readin = 0; | |
4524 | ||
4525 | /* No private part is necessary for include psymtabs. This property | |
4526 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4527 | the regular ones. */ |
58a9656e | 4528 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4529 | } |
4530 | ||
4531 | /* Read the Line Number Program data and extract the list of files | |
4532 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4533 | partial symtab for each of these included files. */ |
aaa75496 JB |
4534 | |
4535 | static void | |
4536 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4537 | struct die_info *die, |
4538 | struct partial_symtab *pst) | |
aaa75496 | 4539 | { |
d85a05f0 DJ |
4540 | struct line_header *lh = NULL; |
4541 | struct attribute *attr; | |
aaa75496 | 4542 | |
d85a05f0 DJ |
4543 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4544 | if (attr) | |
3019eac3 | 4545 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4546 | if (lh == NULL) |
4547 | return; /* No linetable, so no includes. */ | |
4548 | ||
c6da4cef | 4549 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
527f3840 | 4550 | dwarf_decode_lines (lh, pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
4551 | |
4552 | free_line_header (lh); | |
4553 | } | |
4554 | ||
348e048f | 4555 | static hashval_t |
52dc124a | 4556 | hash_signatured_type (const void *item) |
348e048f | 4557 | { |
9a3c8263 SM |
4558 | const struct signatured_type *sig_type |
4559 | = (const struct signatured_type *) item; | |
9a619af0 | 4560 | |
348e048f | 4561 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4562 | return sig_type->signature; |
348e048f DE |
4563 | } |
4564 | ||
4565 | static int | |
52dc124a | 4566 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 4567 | { |
9a3c8263 SM |
4568 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
4569 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 4570 | |
348e048f DE |
4571 | return lhs->signature == rhs->signature; |
4572 | } | |
4573 | ||
1fd400ff TT |
4574 | /* Allocate a hash table for signatured types. */ |
4575 | ||
4576 | static htab_t | |
673bfd45 | 4577 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4578 | { |
4579 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4580 | hash_signatured_type, |
4581 | eq_signatured_type, | |
1fd400ff TT |
4582 | NULL, |
4583 | &objfile->objfile_obstack, | |
4584 | hashtab_obstack_allocate, | |
4585 | dummy_obstack_deallocate); | |
4586 | } | |
4587 | ||
d467dd73 | 4588 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4589 | |
4590 | static int | |
d467dd73 | 4591 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 4592 | { |
9a3c8263 SM |
4593 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
4594 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 4595 | |
b4dd5633 | 4596 | **datap = sigt; |
1fd400ff TT |
4597 | ++*datap; |
4598 | ||
4599 | return 1; | |
4600 | } | |
4601 | ||
c88ee1f0 DE |
4602 | /* Create the hash table of all entries in the .debug_types |
4603 | (or .debug_types.dwo) section(s). | |
4604 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4605 | otherwise it is NULL. | |
4606 | ||
4607 | The result is a pointer to the hash table or NULL if there are no types. | |
4608 | ||
4609 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4610 | |
3019eac3 DE |
4611 | static htab_t |
4612 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4613 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4614 | { |
3019eac3 | 4615 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4616 | htab_t types_htab = NULL; |
8b70b953 TT |
4617 | int ix; |
4618 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4619 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4620 | |
3019eac3 DE |
4621 | if (VEC_empty (dwarf2_section_info_def, types)) |
4622 | return NULL; | |
348e048f | 4623 | |
4bdcc0c1 DE |
4624 | abbrev_section = (dwo_file != NULL |
4625 | ? &dwo_file->sections.abbrev | |
4626 | : &dwarf2_per_objfile->abbrev); | |
4627 | ||
b4f54984 | 4628 | if (dwarf_read_debug) |
09406207 DE |
4629 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", |
4630 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4631 | get_section_file_name (abbrev_section)); |
09406207 | 4632 | |
8b70b953 | 4633 | for (ix = 0; |
3019eac3 | 4634 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4635 | ++ix) |
4636 | { | |
3019eac3 | 4637 | bfd *abfd; |
d521ce57 | 4638 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4639 | |
8b70b953 TT |
4640 | dwarf2_read_section (objfile, section); |
4641 | info_ptr = section->buffer; | |
348e048f | 4642 | |
8b70b953 TT |
4643 | if (info_ptr == NULL) |
4644 | continue; | |
348e048f | 4645 | |
3019eac3 | 4646 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4647 | not present, in which case the bfd is unknown. */ |
4648 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4649 | |
dee91e82 DE |
4650 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4651 | because we don't need to read any dies: the signature is in the | |
4652 | header. */ | |
8b70b953 TT |
4653 | |
4654 | end_ptr = info_ptr + section->size; | |
4655 | while (info_ptr < end_ptr) | |
4656 | { | |
b64f50a1 | 4657 | sect_offset offset; |
3019eac3 | 4658 | cu_offset type_offset_in_tu; |
8b70b953 | 4659 | ULONGEST signature; |
52dc124a | 4660 | struct signatured_type *sig_type; |
3019eac3 | 4661 | struct dwo_unit *dwo_tu; |
8b70b953 | 4662 | void **slot; |
d521ce57 | 4663 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4664 | struct comp_unit_head header; |
dee91e82 | 4665 | unsigned int length; |
348e048f | 4666 | |
b64f50a1 | 4667 | offset.sect_off = ptr - section->buffer; |
348e048f | 4668 | |
8b70b953 | 4669 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4670 | table, but we don't need anything else just yet. */ |
348e048f | 4671 | |
4bdcc0c1 DE |
4672 | ptr = read_and_check_type_unit_head (&header, section, |
4673 | abbrev_section, ptr, | |
3019eac3 | 4674 | &signature, &type_offset_in_tu); |
6caca83c | 4675 | |
1ce1cefd | 4676 | length = get_cu_length (&header); |
dee91e82 | 4677 | |
6caca83c | 4678 | /* Skip dummy type units. */ |
dee91e82 DE |
4679 | if (ptr >= info_ptr + length |
4680 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4681 | { |
1ce1cefd | 4682 | info_ptr += length; |
6caca83c CC |
4683 | continue; |
4684 | } | |
8b70b953 | 4685 | |
0349ea22 DE |
4686 | if (types_htab == NULL) |
4687 | { | |
4688 | if (dwo_file) | |
4689 | types_htab = allocate_dwo_unit_table (objfile); | |
4690 | else | |
4691 | types_htab = allocate_signatured_type_table (objfile); | |
4692 | } | |
4693 | ||
3019eac3 DE |
4694 | if (dwo_file) |
4695 | { | |
4696 | sig_type = NULL; | |
4697 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4698 | struct dwo_unit); | |
4699 | dwo_tu->dwo_file = dwo_file; | |
4700 | dwo_tu->signature = signature; | |
4701 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4702 | dwo_tu->section = section; |
3019eac3 DE |
4703 | dwo_tu->offset = offset; |
4704 | dwo_tu->length = length; | |
4705 | } | |
4706 | else | |
4707 | { | |
4708 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4709 | The real type_offset is in the DWO file. */ | |
4710 | dwo_tu = NULL; | |
4711 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4712 | struct signatured_type); | |
4713 | sig_type->signature = signature; | |
4714 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4715 | sig_type->per_cu.objfile = objfile; | |
4716 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4717 | sig_type->per_cu.section = section; |
3019eac3 DE |
4718 | sig_type->per_cu.offset = offset; |
4719 | sig_type->per_cu.length = length; | |
4720 | } | |
8b70b953 | 4721 | |
3019eac3 DE |
4722 | slot = htab_find_slot (types_htab, |
4723 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4724 | INSERT); | |
8b70b953 TT |
4725 | gdb_assert (slot != NULL); |
4726 | if (*slot != NULL) | |
4727 | { | |
3019eac3 DE |
4728 | sect_offset dup_offset; |
4729 | ||
4730 | if (dwo_file) | |
4731 | { | |
9a3c8263 SM |
4732 | const struct dwo_unit *dup_tu |
4733 | = (const struct dwo_unit *) *slot; | |
3019eac3 DE |
4734 | |
4735 | dup_offset = dup_tu->offset; | |
4736 | } | |
4737 | else | |
4738 | { | |
9a3c8263 SM |
4739 | const struct signatured_type *dup_tu |
4740 | = (const struct signatured_type *) *slot; | |
3019eac3 DE |
4741 | |
4742 | dup_offset = dup_tu->per_cu.offset; | |
4743 | } | |
b3c8eb43 | 4744 | |
8b70b953 | 4745 | complaint (&symfile_complaints, |
c88ee1f0 | 4746 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4747 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4748 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4749 | hex_string (signature)); |
8b70b953 | 4750 | } |
3019eac3 | 4751 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4752 | |
b4f54984 | 4753 | if (dwarf_read_debug > 1) |
4031ecc5 | 4754 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4755 | offset.sect_off, |
4031ecc5 | 4756 | hex_string (signature)); |
348e048f | 4757 | |
dee91e82 | 4758 | info_ptr += length; |
8b70b953 | 4759 | } |
348e048f DE |
4760 | } |
4761 | ||
3019eac3 DE |
4762 | return types_htab; |
4763 | } | |
4764 | ||
4765 | /* Create the hash table of all entries in the .debug_types section, | |
4766 | and initialize all_type_units. | |
4767 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4768 | otherwise non-zero. */ | |
4769 | ||
4770 | static int | |
4771 | create_all_type_units (struct objfile *objfile) | |
4772 | { | |
4773 | htab_t types_htab; | |
b4dd5633 | 4774 | struct signatured_type **iter; |
3019eac3 DE |
4775 | |
4776 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4777 | if (types_htab == NULL) | |
4778 | { | |
4779 | dwarf2_per_objfile->signatured_types = NULL; | |
4780 | return 0; | |
4781 | } | |
4782 | ||
348e048f DE |
4783 | dwarf2_per_objfile->signatured_types = types_htab; |
4784 | ||
6aa5f3a6 DE |
4785 | dwarf2_per_objfile->n_type_units |
4786 | = dwarf2_per_objfile->n_allocated_type_units | |
4787 | = htab_elements (types_htab); | |
8d749320 SM |
4788 | dwarf2_per_objfile->all_type_units = |
4789 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
4790 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4791 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4792 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4793 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4794 | |
348e048f DE |
4795 | return 1; |
4796 | } | |
4797 | ||
6aa5f3a6 DE |
4798 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
4799 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
4800 | Otherwise we find one. */ | |
4801 | ||
4802 | static struct signatured_type * | |
4803 | add_type_unit (ULONGEST sig, void **slot) | |
4804 | { | |
4805 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4806 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4807 | struct signatured_type *sig_type; | |
4808 | ||
4809 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
4810 | ++n_type_units; | |
4811 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
4812 | { | |
4813 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
4814 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
4815 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
4816 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
4817 | = XRESIZEVEC (struct signatured_type *, |
4818 | dwarf2_per_objfile->all_type_units, | |
4819 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
4820 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
4821 | } | |
4822 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4823 | ||
4824 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4825 | struct signatured_type); | |
4826 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4827 | sig_type->signature = sig; | |
4828 | sig_type->per_cu.is_debug_types = 1; | |
4829 | if (dwarf2_per_objfile->using_index) | |
4830 | { | |
4831 | sig_type->per_cu.v.quick = | |
4832 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4833 | struct dwarf2_per_cu_quick_data); | |
4834 | } | |
4835 | ||
4836 | if (slot == NULL) | |
4837 | { | |
4838 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4839 | sig_type, INSERT); | |
4840 | } | |
4841 | gdb_assert (*slot == NULL); | |
4842 | *slot = sig_type; | |
4843 | /* The rest of sig_type must be filled in by the caller. */ | |
4844 | return sig_type; | |
4845 | } | |
4846 | ||
a2ce51a0 DE |
4847 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4848 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4849 | ||
4850 | static void | |
4851 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4852 | struct signatured_type *sig_entry, | |
4853 | struct dwo_unit *dwo_entry) | |
4854 | { | |
7ee85ab1 | 4855 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4856 | gdb_assert (! sig_entry->per_cu.queued); |
4857 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
4858 | if (dwarf2_per_objfile->using_index) |
4859 | { | |
4860 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 4861 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
4862 | } |
4863 | else | |
4864 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 DE |
4865 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
4866 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4867 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4868 | gdb_assert (sig_entry->dwo_unit == NULL); |
4869 | ||
4870 | sig_entry->per_cu.section = dwo_entry->section; | |
4871 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4872 | sig_entry->per_cu.length = dwo_entry->length; | |
4873 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4874 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4875 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4876 | sig_entry->dwo_unit = dwo_entry; | |
4877 | } | |
4878 | ||
4879 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4880 | If we haven't read the TU yet, create the signatured_type data structure |
4881 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4882 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4883 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4884 | containing that CU. Otherwise we could end up reading several other DWO | |
4885 | files (due to comdat folding) to process the transitive closure of all the | |
4886 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4887 | type signature that it needs. | |
a2ce51a0 DE |
4888 | We only do this for .gdb_index because in the psymtab case we already have |
4889 | to read all the DWOs to build the type unit groups. */ | |
4890 | ||
4891 | static struct signatured_type * | |
4892 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4893 | { | |
4894 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4895 | struct dwo_file *dwo_file; | |
4896 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4897 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4898 | void **slot; |
a2ce51a0 DE |
4899 | |
4900 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4901 | ||
6aa5f3a6 DE |
4902 | /* If TU skeletons have been removed then we may not have read in any |
4903 | TUs yet. */ | |
4904 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4905 | { | |
4906 | dwarf2_per_objfile->signatured_types | |
4907 | = allocate_signatured_type_table (objfile); | |
4908 | } | |
a2ce51a0 DE |
4909 | |
4910 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
4911 | Use the global signatured_types array to do our own comdat-folding |
4912 | of types. If this is the first time we're reading this TU, and | |
4913 | the TU has an entry in .gdb_index, replace the recorded data from | |
4914 | .gdb_index with this TU. */ | |
a2ce51a0 | 4915 | |
a2ce51a0 | 4916 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
4917 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
4918 | &find_sig_entry, INSERT); | |
9a3c8263 | 4919 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
4920 | |
4921 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
4922 | read. Don't reassign the global entry to point to this DWO if that's |
4923 | the case. Also note that if the TU is already being read, it may not | |
4924 | have come from a DWO, the program may be a mix of Fission-compiled | |
4925 | code and non-Fission-compiled code. */ | |
4926 | ||
4927 | /* Have we already tried to read this TU? | |
4928 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
4929 | needn't exist in the global table yet). */ | |
4930 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
4931 | return sig_entry; |
4932 | ||
6aa5f3a6 DE |
4933 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
4934 | dwo_unit of the TU itself. */ | |
4935 | dwo_file = cu->dwo_unit->dwo_file; | |
4936 | ||
a2ce51a0 DE |
4937 | /* Ok, this is the first time we're reading this TU. */ |
4938 | if (dwo_file->tus == NULL) | |
4939 | return NULL; | |
4940 | find_dwo_entry.signature = sig; | |
9a3c8263 | 4941 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
4942 | if (dwo_entry == NULL) |
4943 | return NULL; | |
4944 | ||
6aa5f3a6 DE |
4945 | /* If the global table doesn't have an entry for this TU, add one. */ |
4946 | if (sig_entry == NULL) | |
4947 | sig_entry = add_type_unit (sig, slot); | |
4948 | ||
a2ce51a0 | 4949 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 4950 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4951 | return sig_entry; |
4952 | } | |
4953 | ||
a2ce51a0 DE |
4954 | /* Subroutine of lookup_signatured_type. |
4955 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
4956 | then try the DWP file. If the TU stub (skeleton) has been removed then |
4957 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
4958 | |
4959 | static struct signatured_type * | |
4960 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4961 | { | |
4962 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4963 | struct dwp_file *dwp_file = get_dwp_file (); | |
4964 | struct dwo_unit *dwo_entry; | |
4965 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4966 | void **slot; |
a2ce51a0 DE |
4967 | |
4968 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4969 | gdb_assert (dwp_file != NULL); | |
4970 | ||
6aa5f3a6 DE |
4971 | /* If TU skeletons have been removed then we may not have read in any |
4972 | TUs yet. */ | |
4973 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 4974 | { |
6aa5f3a6 DE |
4975 | dwarf2_per_objfile->signatured_types |
4976 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
4977 | } |
4978 | ||
6aa5f3a6 DE |
4979 | find_sig_entry.signature = sig; |
4980 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4981 | &find_sig_entry, INSERT); | |
9a3c8263 | 4982 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
4983 | |
4984 | /* Have we already tried to read this TU? | |
4985 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
4986 | needn't exist in the global table yet). */ | |
4987 | if (sig_entry != NULL) | |
4988 | return sig_entry; | |
4989 | ||
a2ce51a0 DE |
4990 | if (dwp_file->tus == NULL) |
4991 | return NULL; | |
57d63ce2 DE |
4992 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
4993 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
4994 | if (dwo_entry == NULL) |
4995 | return NULL; | |
4996 | ||
6aa5f3a6 | 4997 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
4998 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
4999 | ||
a2ce51a0 DE |
5000 | return sig_entry; |
5001 | } | |
5002 | ||
380bca97 | 5003 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5004 | Returns NULL if signature SIG is not present in the table. |
5005 | It is up to the caller to complain about this. */ | |
348e048f DE |
5006 | |
5007 | static struct signatured_type * | |
a2ce51a0 | 5008 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5009 | { |
a2ce51a0 DE |
5010 | if (cu->dwo_unit |
5011 | && dwarf2_per_objfile->using_index) | |
5012 | { | |
5013 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5014 | These cases require special processing. */ | |
5015 | if (get_dwp_file () == NULL) | |
5016 | return lookup_dwo_signatured_type (cu, sig); | |
5017 | else | |
5018 | return lookup_dwp_signatured_type (cu, sig); | |
5019 | } | |
5020 | else | |
5021 | { | |
5022 | struct signatured_type find_entry, *entry; | |
348e048f | 5023 | |
a2ce51a0 DE |
5024 | if (dwarf2_per_objfile->signatured_types == NULL) |
5025 | return NULL; | |
5026 | find_entry.signature = sig; | |
9a3c8263 SM |
5027 | entry = ((struct signatured_type *) |
5028 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5029 | return entry; |
5030 | } | |
348e048f | 5031 | } |
42e7ad6c DE |
5032 | \f |
5033 | /* Low level DIE reading support. */ | |
348e048f | 5034 | |
d85a05f0 DJ |
5035 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5036 | ||
5037 | static void | |
5038 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5039 | struct dwarf2_cu *cu, |
3019eac3 DE |
5040 | struct dwarf2_section_info *section, |
5041 | struct dwo_file *dwo_file) | |
d85a05f0 | 5042 | { |
fceca515 | 5043 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5044 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5045 | reader->cu = cu; |
3019eac3 | 5046 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5047 | reader->die_section = section; |
5048 | reader->buffer = section->buffer; | |
f664829e | 5049 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5050 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5051 | } |
5052 | ||
b0c7bfa9 DE |
5053 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5054 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5055 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5056 | already. | |
5057 | ||
5058 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5059 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5060 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5061 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5062 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5063 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5064 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5065 | are filled in with the info of the DIE from the DWO file. | |
5066 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5067 | provided an abbrev table to use. | |
5068 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5069 | ||
5070 | static int | |
5071 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5072 | struct dwo_unit *dwo_unit, | |
5073 | int abbrev_table_provided, | |
5074 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5075 | const char *stub_comp_dir, |
b0c7bfa9 | 5076 | struct die_reader_specs *result_reader, |
d521ce57 | 5077 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5078 | struct die_info **result_comp_unit_die, |
5079 | int *result_has_children) | |
5080 | { | |
5081 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5082 | struct dwarf2_cu *cu = this_cu->cu; | |
5083 | struct dwarf2_section_info *section; | |
5084 | bfd *abfd; | |
d521ce57 | 5085 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5086 | ULONGEST signature; /* Or dwo_id. */ |
5087 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5088 | int i,num_extra_attrs; | |
5089 | struct dwarf2_section_info *dwo_abbrev_section; | |
5090 | struct attribute *attr; | |
5091 | struct die_info *comp_unit_die; | |
5092 | ||
b0aeadb3 DE |
5093 | /* At most one of these may be provided. */ |
5094 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5095 | |
b0c7bfa9 DE |
5096 | /* These attributes aren't processed until later: |
5097 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5098 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5099 | referenced later. However, these attributes are found in the stub | |
5100 | which we won't have later. In order to not impose this complication | |
5101 | on the rest of the code, we read them here and copy them to the | |
5102 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5103 | |
5104 | stmt_list = NULL; | |
5105 | low_pc = NULL; | |
5106 | high_pc = NULL; | |
5107 | ranges = NULL; | |
5108 | comp_dir = NULL; | |
5109 | ||
5110 | if (stub_comp_unit_die != NULL) | |
5111 | { | |
5112 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5113 | DWO file. */ | |
5114 | if (! this_cu->is_debug_types) | |
5115 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5116 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5117 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5118 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5119 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5120 | ||
5121 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5122 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5123 | cu->addr_base = 0; | |
5124 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5125 | if (attr) | |
5126 | cu->addr_base = DW_UNSND (attr); | |
5127 | ||
5128 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5129 | We need the value before we can process DW_AT_ranges. */ | |
5130 | cu->ranges_base = 0; | |
5131 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5132 | if (attr) | |
5133 | cu->ranges_base = DW_UNSND (attr); | |
5134 | } | |
a2ce51a0 DE |
5135 | else if (stub_comp_dir != NULL) |
5136 | { | |
5137 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5138 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5139 | comp_dir->name = DW_AT_comp_dir; |
5140 | comp_dir->form = DW_FORM_string; | |
5141 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5142 | DW_STRING (comp_dir) = stub_comp_dir; | |
5143 | } | |
b0c7bfa9 DE |
5144 | |
5145 | /* Set up for reading the DWO CU/TU. */ | |
5146 | cu->dwo_unit = dwo_unit; | |
5147 | section = dwo_unit->section; | |
5148 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5149 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
5150 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
5151 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
5152 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5153 | ||
5154 | if (this_cu->is_debug_types) | |
5155 | { | |
5156 | ULONGEST header_signature; | |
5157 | cu_offset type_offset_in_tu; | |
5158 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
5159 | ||
5160 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
5161 | dwo_abbrev_section, | |
5162 | info_ptr, | |
5163 | &header_signature, | |
5164 | &type_offset_in_tu); | |
a2ce51a0 DE |
5165 | /* This is not an assert because it can be caused by bad debug info. */ |
5166 | if (sig_type->signature != header_signature) | |
5167 | { | |
5168 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5169 | " TU at offset 0x%x [in module %s]"), | |
5170 | hex_string (sig_type->signature), | |
5171 | hex_string (header_signature), | |
5172 | dwo_unit->offset.sect_off, | |
5173 | bfd_get_filename (abfd)); | |
5174 | } | |
b0c7bfa9 DE |
5175 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
5176 | /* For DWOs coming from DWP files, we don't know the CU length | |
5177 | nor the type's offset in the TU until now. */ | |
5178 | dwo_unit->length = get_cu_length (&cu->header); | |
5179 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
5180 | ||
5181 | /* Establish the type offset that can be used to lookup the type. | |
5182 | For DWO files, we don't know it until now. */ | |
5183 | sig_type->type_offset_in_section.sect_off = | |
5184 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
5185 | } | |
5186 | else | |
5187 | { | |
5188 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5189 | dwo_abbrev_section, | |
5190 | info_ptr, 0); | |
5191 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
5192 | /* For DWOs coming from DWP files, we don't know the CU length | |
5193 | until now. */ | |
5194 | dwo_unit->length = get_cu_length (&cu->header); | |
5195 | } | |
5196 | ||
02142a6c DE |
5197 | /* Replace the CU's original abbrev table with the DWO's. |
5198 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5199 | if (abbrev_table_provided) |
5200 | { | |
5201 | /* Don't free the provided abbrev table, the caller of | |
5202 | init_cutu_and_read_dies owns it. */ | |
5203 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5204 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5205 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5206 | } | |
5207 | else | |
5208 | { | |
5209 | dwarf2_free_abbrev_table (cu); | |
5210 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5211 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5212 | } |
5213 | ||
5214 | /* Read in the die, but leave space to copy over the attributes | |
5215 | from the stub. This has the benefit of simplifying the rest of | |
5216 | the code - all the work to maintain the illusion of a single | |
5217 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5218 | num_extra_attrs = ((stmt_list != NULL) | |
5219 | + (low_pc != NULL) | |
5220 | + (high_pc != NULL) | |
5221 | + (ranges != NULL) | |
5222 | + (comp_dir != NULL)); | |
5223 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5224 | result_has_children, num_extra_attrs); | |
5225 | ||
5226 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5227 | comp_unit_die = *result_comp_unit_die; | |
5228 | i = comp_unit_die->num_attrs; | |
5229 | if (stmt_list != NULL) | |
5230 | comp_unit_die->attrs[i++] = *stmt_list; | |
5231 | if (low_pc != NULL) | |
5232 | comp_unit_die->attrs[i++] = *low_pc; | |
5233 | if (high_pc != NULL) | |
5234 | comp_unit_die->attrs[i++] = *high_pc; | |
5235 | if (ranges != NULL) | |
5236 | comp_unit_die->attrs[i++] = *ranges; | |
5237 | if (comp_dir != NULL) | |
5238 | comp_unit_die->attrs[i++] = *comp_dir; | |
5239 | comp_unit_die->num_attrs += num_extra_attrs; | |
5240 | ||
b4f54984 | 5241 | if (dwarf_die_debug) |
bf6af496 DE |
5242 | { |
5243 | fprintf_unfiltered (gdb_stdlog, | |
5244 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5245 | get_section_name (section), |
bf6af496 DE |
5246 | (unsigned) (begin_info_ptr - section->buffer), |
5247 | bfd_get_filename (abfd)); | |
b4f54984 | 5248 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
5249 | } |
5250 | ||
a2ce51a0 DE |
5251 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5252 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5253 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5254 | to get it via circuitous means. Blech. */ | |
5255 | if (comp_dir != NULL) | |
5256 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5257 | ||
b0c7bfa9 DE |
5258 | /* Skip dummy compilation units. */ |
5259 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5260 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5261 | return 0; | |
5262 | ||
5263 | *result_info_ptr = info_ptr; | |
5264 | return 1; | |
5265 | } | |
5266 | ||
5267 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5268 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5269 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5270 | |
5271 | static struct dwo_unit * | |
5272 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5273 | struct die_info *comp_unit_die) | |
5274 | { | |
5275 | struct dwarf2_cu *cu = this_cu->cu; | |
5276 | struct attribute *attr; | |
5277 | ULONGEST signature; | |
5278 | struct dwo_unit *dwo_unit; | |
5279 | const char *comp_dir, *dwo_name; | |
5280 | ||
a2ce51a0 DE |
5281 | gdb_assert (cu != NULL); |
5282 | ||
b0c7bfa9 | 5283 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
5284 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5285 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
5286 | |
5287 | if (this_cu->is_debug_types) | |
5288 | { | |
5289 | struct signatured_type *sig_type; | |
5290 | ||
5291 | /* Since this_cu is the first member of struct signatured_type, | |
5292 | we can go from a pointer to one to a pointer to the other. */ | |
5293 | sig_type = (struct signatured_type *) this_cu; | |
5294 | signature = sig_type->signature; | |
5295 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5296 | } | |
5297 | else | |
5298 | { | |
5299 | struct attribute *attr; | |
5300 | ||
5301 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5302 | if (! attr) | |
5303 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5304 | " [in module %s]"), | |
4262abfb | 5305 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5306 | signature = DW_UNSND (attr); |
5307 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5308 | signature); | |
5309 | } | |
5310 | ||
b0c7bfa9 DE |
5311 | return dwo_unit; |
5312 | } | |
5313 | ||
a2ce51a0 | 5314 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5315 | See it for a description of the parameters. |
5316 | Read a TU directly from a DWO file, bypassing the stub. | |
5317 | ||
5318 | Note: This function could be a little bit simpler if we shared cleanups | |
5319 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5320 | to do, so we keep this function self-contained. Or we could move this | |
5321 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5322 | |
5323 | static void | |
6aa5f3a6 DE |
5324 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5325 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5326 | die_reader_func_ftype *die_reader_func, |
5327 | void *data) | |
5328 | { | |
5329 | struct dwarf2_cu *cu; | |
5330 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5331 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5332 | struct die_reader_specs reader; |
5333 | const gdb_byte *info_ptr; | |
5334 | struct die_info *comp_unit_die; | |
5335 | int has_children; | |
5336 | ||
5337 | /* Verify we can do the following downcast, and that we have the | |
5338 | data we need. */ | |
5339 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5340 | sig_type = (struct signatured_type *) this_cu; | |
5341 | gdb_assert (sig_type->dwo_unit != NULL); | |
5342 | ||
5343 | cleanups = make_cleanup (null_cleanup, NULL); | |
5344 | ||
6aa5f3a6 DE |
5345 | if (use_existing_cu && this_cu->cu != NULL) |
5346 | { | |
5347 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5348 | cu = this_cu->cu; | |
5349 | /* There's no need to do the rereading_dwo_cu handling that | |
5350 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5351 | } | |
5352 | else | |
5353 | { | |
5354 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5355 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5356 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
5357 | init_one_comp_unit (cu, this_cu); |
5358 | /* If an error occurs while loading, release our storage. */ | |
5359 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5360 | } | |
5361 | ||
5362 | /* A future optimization, if needed, would be to use an existing | |
5363 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5364 | could share abbrev tables. */ | |
a2ce51a0 DE |
5365 | |
5366 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5367 | 0 /* abbrev_table_provided */, | |
5368 | NULL /* stub_comp_unit_die */, | |
5369 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5370 | &reader, &info_ptr, | |
5371 | &comp_unit_die, &has_children) == 0) | |
5372 | { | |
5373 | /* Dummy die. */ | |
5374 | do_cleanups (cleanups); | |
5375 | return; | |
5376 | } | |
5377 | ||
5378 | /* All the "real" work is done here. */ | |
5379 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5380 | ||
6aa5f3a6 | 5381 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5382 | but the alternative is making the latter more complex. |
5383 | This function is only for the special case of using DWO files directly: | |
5384 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5385 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5386 | { |
6aa5f3a6 DE |
5387 | if (keep) |
5388 | { | |
5389 | /* We've successfully allocated this compilation unit. Let our | |
5390 | caller clean it up when finished with it. */ | |
5391 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5392 | |
6aa5f3a6 DE |
5393 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5394 | So we have to manually free the abbrev table. */ | |
5395 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5396 | |
6aa5f3a6 DE |
5397 | /* Link this CU into read_in_chain. */ |
5398 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5399 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5400 | } | |
5401 | else | |
5402 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5403 | } |
a2ce51a0 DE |
5404 | |
5405 | do_cleanups (cleanups); | |
5406 | } | |
5407 | ||
fd820528 | 5408 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5409 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5410 | |
f4dc4d17 DE |
5411 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5412 | Otherwise the table specified in the comp unit header is read in and used. | |
5413 | This is an optimization for when we already have the abbrev table. | |
5414 | ||
dee91e82 DE |
5415 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5416 | Otherwise, a new CU is allocated with xmalloc. | |
5417 | ||
5418 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5419 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5420 | ||
5421 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5422 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5423 | |
70221824 | 5424 | static void |
fd820528 | 5425 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5426 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5427 | int use_existing_cu, int keep, |
5428 | die_reader_func_ftype *die_reader_func, | |
5429 | void *data) | |
c906108c | 5430 | { |
dee91e82 | 5431 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5432 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5433 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5434 | struct dwarf2_cu *cu; |
d521ce57 | 5435 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5436 | struct die_reader_specs reader; |
d85a05f0 | 5437 | struct die_info *comp_unit_die; |
dee91e82 | 5438 | int has_children; |
d85a05f0 | 5439 | struct attribute *attr; |
365156ad | 5440 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5441 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5442 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5443 | /* Non-zero if CU currently points to a DWO file and we need to |
5444 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5445 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5446 | int rereading_dwo_cu = 0; |
c906108c | 5447 | |
b4f54984 | 5448 | if (dwarf_die_debug) |
09406207 DE |
5449 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5450 | this_cu->is_debug_types ? "type" : "comp", | |
5451 | this_cu->offset.sect_off); | |
5452 | ||
dee91e82 DE |
5453 | if (use_existing_cu) |
5454 | gdb_assert (keep); | |
23745b47 | 5455 | |
a2ce51a0 DE |
5456 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5457 | file (instead of going through the stub), short-circuit all of this. */ | |
5458 | if (this_cu->reading_dwo_directly) | |
5459 | { | |
5460 | /* Narrow down the scope of possibilities to have to understand. */ | |
5461 | gdb_assert (this_cu->is_debug_types); | |
5462 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5463 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5464 | die_reader_func, data); | |
a2ce51a0 DE |
5465 | return; |
5466 | } | |
5467 | ||
dee91e82 DE |
5468 | cleanups = make_cleanup (null_cleanup, NULL); |
5469 | ||
5470 | /* This is cheap if the section is already read in. */ | |
5471 | dwarf2_read_section (objfile, section); | |
5472 | ||
5473 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5474 | |
5475 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5476 | |
5477 | if (use_existing_cu && this_cu->cu != NULL) | |
5478 | { | |
5479 | cu = this_cu->cu; | |
42e7ad6c DE |
5480 | /* If this CU is from a DWO file we need to start over, we need to |
5481 | refetch the attributes from the skeleton CU. | |
5482 | This could be optimized by retrieving those attributes from when we | |
5483 | were here the first time: the previous comp_unit_die was stored in | |
5484 | comp_unit_obstack. But there's no data yet that we need this | |
5485 | optimization. */ | |
5486 | if (cu->dwo_unit != NULL) | |
5487 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5488 | } |
5489 | else | |
5490 | { | |
5491 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5492 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5493 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 5494 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 5495 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5496 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5497 | } |
dee91e82 | 5498 | |
b0c7bfa9 | 5499 | /* Get the header. */ |
42e7ad6c DE |
5500 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5501 | { | |
5502 | /* We already have the header, there's no need to read it in again. */ | |
5503 | info_ptr += cu->header.first_die_offset.cu_off; | |
5504 | } | |
5505 | else | |
5506 | { | |
3019eac3 | 5507 | if (this_cu->is_debug_types) |
dee91e82 DE |
5508 | { |
5509 | ULONGEST signature; | |
42e7ad6c | 5510 | cu_offset type_offset_in_tu; |
dee91e82 | 5511 | |
4bdcc0c1 DE |
5512 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5513 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5514 | &signature, |
5515 | &type_offset_in_tu); | |
dee91e82 | 5516 | |
42e7ad6c DE |
5517 | /* Since per_cu is the first member of struct signatured_type, |
5518 | we can go from a pointer to one to a pointer to the other. */ | |
5519 | sig_type = (struct signatured_type *) this_cu; | |
5520 | gdb_assert (sig_type->signature == signature); | |
5521 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5522 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5523 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5524 | ||
42e7ad6c DE |
5525 | /* LENGTH has not been set yet for type units if we're |
5526 | using .gdb_index. */ | |
1ce1cefd | 5527 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5528 | |
5529 | /* Establish the type offset that can be used to lookup the type. */ | |
5530 | sig_type->type_offset_in_section.sect_off = | |
5531 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5532 | } |
5533 | else | |
5534 | { | |
4bdcc0c1 DE |
5535 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5536 | abbrev_section, | |
5537 | info_ptr, 0); | |
dee91e82 DE |
5538 | |
5539 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5540 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5541 | } |
5542 | } | |
10b3939b | 5543 | |
6caca83c | 5544 | /* Skip dummy compilation units. */ |
dee91e82 | 5545 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5546 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5547 | { | |
dee91e82 | 5548 | do_cleanups (cleanups); |
21b2bd31 | 5549 | return; |
6caca83c CC |
5550 | } |
5551 | ||
433df2d4 DE |
5552 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5553 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5554 | done. Note that it's important that if the CU had an abbrev table |
5555 | on entry we don't free it when we're done: Somewhere up the call stack | |
5556 | it may be in use. */ | |
f4dc4d17 DE |
5557 | if (abbrev_table != NULL) |
5558 | { | |
5559 | gdb_assert (cu->abbrev_table == NULL); | |
5560 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5561 | == abbrev_table->offset.sect_off); | |
5562 | cu->abbrev_table = abbrev_table; | |
5563 | } | |
5564 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5565 | { |
4bdcc0c1 | 5566 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5567 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5568 | } | |
42e7ad6c DE |
5569 | else if (rereading_dwo_cu) |
5570 | { | |
5571 | dwarf2_free_abbrev_table (cu); | |
5572 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5573 | } | |
af703f96 | 5574 | |
dee91e82 | 5575 | /* Read the top level CU/TU die. */ |
3019eac3 | 5576 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5577 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5578 | |
b0c7bfa9 DE |
5579 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5580 | from the DWO file. | |
5581 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5582 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5583 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5584 | if (attr) | |
5585 | { | |
3019eac3 | 5586 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5587 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5588 | |
5589 | if (has_children) | |
6a506a2d DE |
5590 | { |
5591 | complaint (&symfile_complaints, | |
5592 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5593 | " has children (offset 0x%x) [in module %s]"), | |
5594 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5595 | } | |
b0c7bfa9 | 5596 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5597 | if (dwo_unit != NULL) |
3019eac3 | 5598 | { |
6a506a2d DE |
5599 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5600 | abbrev_table != NULL, | |
a2ce51a0 | 5601 | comp_unit_die, NULL, |
6a506a2d DE |
5602 | &reader, &info_ptr, |
5603 | &dwo_comp_unit_die, &has_children) == 0) | |
5604 | { | |
5605 | /* Dummy die. */ | |
5606 | do_cleanups (cleanups); | |
5607 | return; | |
5608 | } | |
5609 | comp_unit_die = dwo_comp_unit_die; | |
5610 | } | |
5611 | else | |
5612 | { | |
5613 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5614 | the stub. A complaint has already been logged. There's | |
5615 | not much more we can do except pass on the stub DIE to | |
5616 | die_reader_func. We don't want to throw an error on bad | |
5617 | debug info. */ | |
3019eac3 DE |
5618 | } |
5619 | } | |
5620 | ||
b0c7bfa9 | 5621 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5622 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5623 | ||
b0c7bfa9 | 5624 | /* Done, clean up. */ |
365156ad | 5625 | if (free_cu_cleanup != NULL) |
348e048f | 5626 | { |
365156ad TT |
5627 | if (keep) |
5628 | { | |
5629 | /* We've successfully allocated this compilation unit. Let our | |
5630 | caller clean it up when finished with it. */ | |
5631 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5632 | |
365156ad TT |
5633 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5634 | So we have to manually free the abbrev table. */ | |
5635 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5636 | |
365156ad TT |
5637 | /* Link this CU into read_in_chain. */ |
5638 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5639 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5640 | } | |
5641 | else | |
5642 | do_cleanups (free_cu_cleanup); | |
348e048f | 5643 | } |
365156ad TT |
5644 | |
5645 | do_cleanups (cleanups); | |
dee91e82 DE |
5646 | } |
5647 | ||
33e80786 DE |
5648 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5649 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5650 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5651 | |
5652 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5653 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5654 | |
5655 | We fill in THIS_CU->length. | |
5656 | ||
5657 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5658 | linker) then DIE_READER_FUNC will not get called. | |
5659 | ||
5660 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5661 | This is done in order to not leave THIS_CU->cu in a state where we have |
5662 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5663 | |
5664 | static void | |
5665 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5666 | struct dwo_file *dwo_file, |
dee91e82 DE |
5667 | die_reader_func_ftype *die_reader_func, |
5668 | void *data) | |
5669 | { | |
5670 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5671 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5672 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5673 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5674 | struct dwarf2_cu cu; |
d521ce57 | 5675 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5676 | struct die_reader_specs reader; |
5677 | struct cleanup *cleanups; | |
5678 | struct die_info *comp_unit_die; | |
5679 | int has_children; | |
5680 | ||
b4f54984 | 5681 | if (dwarf_die_debug) |
09406207 DE |
5682 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5683 | this_cu->is_debug_types ? "type" : "comp", | |
5684 | this_cu->offset.sect_off); | |
5685 | ||
dee91e82 DE |
5686 | gdb_assert (this_cu->cu == NULL); |
5687 | ||
33e80786 DE |
5688 | abbrev_section = (dwo_file != NULL |
5689 | ? &dwo_file->sections.abbrev | |
5690 | : get_abbrev_section_for_cu (this_cu)); | |
5691 | ||
dee91e82 DE |
5692 | /* This is cheap if the section is already read in. */ |
5693 | dwarf2_read_section (objfile, section); | |
5694 | ||
5695 | init_one_comp_unit (&cu, this_cu); | |
5696 | ||
5697 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5698 | ||
5699 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5700 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5701 | abbrev_section, info_ptr, | |
3019eac3 | 5702 | this_cu->is_debug_types); |
dee91e82 | 5703 | |
1ce1cefd | 5704 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5705 | |
5706 | /* Skip dummy compilation units. */ | |
5707 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5708 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5709 | { |
dee91e82 | 5710 | do_cleanups (cleanups); |
21b2bd31 | 5711 | return; |
93311388 | 5712 | } |
72bf9492 | 5713 | |
dee91e82 DE |
5714 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5715 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5716 | ||
3019eac3 | 5717 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5718 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5719 | ||
5720 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5721 | ||
5722 | do_cleanups (cleanups); | |
5723 | } | |
5724 | ||
3019eac3 DE |
5725 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5726 | does not lookup the specified DWO file. | |
5727 | This cannot be used to read DWO files. | |
dee91e82 DE |
5728 | |
5729 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5730 | This is done in order to not leave THIS_CU->cu in a state where we have |
5731 | to care whether it refers to the "main" CU or the DWO CU. | |
5732 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5733 | |
5734 | static void | |
5735 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5736 | die_reader_func_ftype *die_reader_func, | |
5737 | void *data) | |
5738 | { | |
33e80786 | 5739 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5740 | } |
0018ea6f DE |
5741 | \f |
5742 | /* Type Unit Groups. | |
dee91e82 | 5743 | |
0018ea6f DE |
5744 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5745 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5746 | so that all types coming from the same compilation (.o file) are grouped | |
5747 | together. A future step could be to put the types in the same symtab as | |
5748 | the CU the types ultimately came from. */ | |
ff013f42 | 5749 | |
f4dc4d17 DE |
5750 | static hashval_t |
5751 | hash_type_unit_group (const void *item) | |
5752 | { | |
9a3c8263 SM |
5753 | const struct type_unit_group *tu_group |
5754 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 5755 | |
094b34ac | 5756 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5757 | } |
348e048f DE |
5758 | |
5759 | static int | |
f4dc4d17 | 5760 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5761 | { |
9a3c8263 SM |
5762 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
5763 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 5764 | |
094b34ac | 5765 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5766 | } |
348e048f | 5767 | |
f4dc4d17 DE |
5768 | /* Allocate a hash table for type unit groups. */ |
5769 | ||
5770 | static htab_t | |
5771 | allocate_type_unit_groups_table (void) | |
5772 | { | |
5773 | return htab_create_alloc_ex (3, | |
5774 | hash_type_unit_group, | |
5775 | eq_type_unit_group, | |
5776 | NULL, | |
5777 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5778 | hashtab_obstack_allocate, | |
5779 | dummy_obstack_deallocate); | |
5780 | } | |
dee91e82 | 5781 | |
f4dc4d17 DE |
5782 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5783 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5784 | of any one psymtab grow too big. */ | |
5785 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5786 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5787 | |
094b34ac | 5788 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5789 | Create the type_unit_group object used to hold one or more TUs. */ |
5790 | ||
5791 | static struct type_unit_group * | |
094b34ac | 5792 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5793 | { |
5794 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5795 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5796 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5797 | |
5798 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5799 | struct type_unit_group); | |
094b34ac | 5800 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5801 | per_cu->objfile = objfile; |
f4dc4d17 | 5802 | |
094b34ac DE |
5803 | if (dwarf2_per_objfile->using_index) |
5804 | { | |
5805 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5806 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5807 | } |
5808 | else | |
5809 | { | |
5810 | unsigned int line_offset = line_offset_struct.sect_off; | |
5811 | struct partial_symtab *pst; | |
5812 | char *name; | |
5813 | ||
5814 | /* Give the symtab a useful name for debug purposes. */ | |
5815 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5816 | name = xstrprintf ("<type_units_%d>", | |
5817 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5818 | else | |
5819 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5820 | ||
5821 | pst = create_partial_symtab (per_cu, name); | |
5822 | pst->anonymous = 1; | |
f4dc4d17 | 5823 | |
094b34ac DE |
5824 | xfree (name); |
5825 | } | |
f4dc4d17 | 5826 | |
094b34ac DE |
5827 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5828 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5829 | |
5830 | return tu_group; | |
5831 | } | |
5832 | ||
094b34ac DE |
5833 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5834 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5835 | |
5836 | static struct type_unit_group * | |
ff39bb5e | 5837 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5838 | { |
5839 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5840 | struct type_unit_group *tu_group; | |
5841 | void **slot; | |
5842 | unsigned int line_offset; | |
5843 | struct type_unit_group type_unit_group_for_lookup; | |
5844 | ||
5845 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5846 | { | |
5847 | dwarf2_per_objfile->type_unit_groups = | |
5848 | allocate_type_unit_groups_table (); | |
5849 | } | |
5850 | ||
5851 | /* Do we need to create a new group, or can we use an existing one? */ | |
5852 | ||
5853 | if (stmt_list) | |
5854 | { | |
5855 | line_offset = DW_UNSND (stmt_list); | |
5856 | ++tu_stats->nr_symtab_sharers; | |
5857 | } | |
5858 | else | |
5859 | { | |
5860 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5861 | We can do various things here like create one group per TU or | |
5862 | spread them over multiple groups to split up the expansion work. | |
5863 | To avoid worst case scenarios (too many groups or too large groups) | |
5864 | we, umm, group them in bunches. */ | |
5865 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5866 | | (tu_stats->nr_stmt_less_type_units | |
5867 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5868 | ++tu_stats->nr_stmt_less_type_units; | |
5869 | } | |
5870 | ||
094b34ac DE |
5871 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5872 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5873 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5874 | &type_unit_group_for_lookup, INSERT); | |
5875 | if (*slot != NULL) | |
5876 | { | |
9a3c8263 | 5877 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
5878 | gdb_assert (tu_group != NULL); |
5879 | } | |
5880 | else | |
5881 | { | |
5882 | sect_offset line_offset_struct; | |
5883 | ||
5884 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5885 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5886 | *slot = tu_group; |
5887 | ++tu_stats->nr_symtabs; | |
5888 | } | |
5889 | ||
5890 | return tu_group; | |
5891 | } | |
0018ea6f DE |
5892 | \f |
5893 | /* Partial symbol tables. */ | |
5894 | ||
5895 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5896 | ||
5897 | The caller must fill in the following details: | |
5898 | dirname, textlow, texthigh. */ | |
5899 | ||
5900 | static struct partial_symtab * | |
5901 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5902 | { | |
5903 | struct objfile *objfile = per_cu->objfile; | |
5904 | struct partial_symtab *pst; | |
5905 | ||
18a94d75 | 5906 | pst = start_psymtab_common (objfile, name, 0, |
0018ea6f DE |
5907 | objfile->global_psymbols.next, |
5908 | objfile->static_psymbols.next); | |
5909 | ||
5910 | pst->psymtabs_addrmap_supported = 1; | |
5911 | ||
5912 | /* This is the glue that links PST into GDB's symbol API. */ | |
5913 | pst->read_symtab_private = per_cu; | |
5914 | pst->read_symtab = dwarf2_read_symtab; | |
5915 | per_cu->v.psymtab = pst; | |
5916 | ||
5917 | return pst; | |
5918 | } | |
5919 | ||
b93601f3 TT |
5920 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5921 | type. */ | |
5922 | ||
5923 | struct process_psymtab_comp_unit_data | |
5924 | { | |
5925 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5926 | ||
5927 | int want_partial_unit; | |
5928 | ||
5929 | /* The "pretend" language that is used if the CU doesn't declare a | |
5930 | language. */ | |
5931 | ||
5932 | enum language pretend_language; | |
5933 | }; | |
5934 | ||
0018ea6f DE |
5935 | /* die_reader_func for process_psymtab_comp_unit. */ |
5936 | ||
5937 | static void | |
5938 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5939 | const gdb_byte *info_ptr, |
0018ea6f DE |
5940 | struct die_info *comp_unit_die, |
5941 | int has_children, | |
5942 | void *data) | |
5943 | { | |
5944 | struct dwarf2_cu *cu = reader->cu; | |
5945 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 5946 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 5947 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
5948 | CORE_ADDR baseaddr; |
5949 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5950 | struct partial_symtab *pst; | |
5951 | int has_pc_info; | |
5952 | const char *filename; | |
9a3c8263 SM |
5953 | struct process_psymtab_comp_unit_data *info |
5954 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 5955 | |
b93601f3 | 5956 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
5957 | return; |
5958 | ||
5959 | gdb_assert (! per_cu->is_debug_types); | |
5960 | ||
b93601f3 | 5961 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
5962 | |
5963 | cu->list_in_scope = &file_symbols; | |
5964 | ||
5965 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
5966 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
5967 | if (filename == NULL) | |
0018ea6f | 5968 | filename = ""; |
0018ea6f DE |
5969 | |
5970 | pst = create_partial_symtab (per_cu, filename); | |
5971 | ||
5972 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 5973 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
5974 | |
5975 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5976 | ||
5977 | dwarf2_find_base_address (comp_unit_die, cu); | |
5978 | ||
5979 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5980 | `DW_AT_ranges'. */ | |
5981 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
5982 | &best_highpc, cu, pst); | |
5983 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
5984 | /* Store the contiguous range if it is not empty; it can be empty for | |
5985 | CUs with no code. */ | |
5986 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
5987 | gdbarch_adjust_dwarf2_addr (gdbarch, |
5988 | best_lowpc + baseaddr), | |
5989 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
5990 | best_highpc + baseaddr) - 1, | |
5991 | pst); | |
0018ea6f DE |
5992 | |
5993 | /* Check if comp unit has_children. | |
5994 | If so, read the rest of the partial symbols from this comp unit. | |
5995 | If not, there's no more debug_info for this comp unit. */ | |
5996 | if (has_children) | |
5997 | { | |
5998 | struct partial_die_info *first_die; | |
5999 | CORE_ADDR lowpc, highpc; | |
6000 | ||
6001 | lowpc = ((CORE_ADDR) -1); | |
6002 | highpc = ((CORE_ADDR) 0); | |
6003 | ||
6004 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6005 | ||
6006 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
6007 | ! has_pc_info, cu); | |
6008 | ||
6009 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6010 | complaints from `maint check'. */ | |
6011 | if (lowpc == ((CORE_ADDR) -1)) | |
6012 | lowpc = highpc; | |
6013 | ||
6014 | /* If the compilation unit didn't have an explicit address range, | |
6015 | then use the information extracted from its child dies. */ | |
6016 | if (! has_pc_info) | |
6017 | { | |
6018 | best_lowpc = lowpc; | |
6019 | best_highpc = highpc; | |
6020 | } | |
6021 | } | |
3e29f34a MR |
6022 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6023 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6024 | |
8763cede | 6025 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6026 | |
6027 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6028 | { | |
6029 | int i; | |
6030 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6031 | struct dwarf2_per_cu_data *iter; | |
6032 | ||
6033 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6034 | post-pass. */ | |
6035 | pst->number_of_dependencies = len; | |
8d749320 SM |
6036 | pst->dependencies = |
6037 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6038 | for (i = 0; |
6039 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6040 | i, iter); | |
6041 | ++i) | |
6042 | pst->dependencies[i] = iter->v.psymtab; | |
6043 | ||
6044 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6045 | } | |
6046 | ||
6047 | /* Get the list of files included in the current compilation unit, | |
6048 | and build a psymtab for each of them. */ | |
6049 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6050 | ||
b4f54984 | 6051 | if (dwarf_read_debug) |
0018ea6f DE |
6052 | { |
6053 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6054 | ||
6055 | fprintf_unfiltered (gdb_stdlog, | |
6056 | "Psymtab for %s unit @0x%x: %s - %s" | |
6057 | ", %d global, %d static syms\n", | |
6058 | per_cu->is_debug_types ? "type" : "comp", | |
6059 | per_cu->offset.sect_off, | |
6060 | paddress (gdbarch, pst->textlow), | |
6061 | paddress (gdbarch, pst->texthigh), | |
6062 | pst->n_global_syms, pst->n_static_syms); | |
6063 | } | |
6064 | } | |
6065 | ||
6066 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6067 | Process compilation unit THIS_CU for a psymtab. */ | |
6068 | ||
6069 | static void | |
6070 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6071 | int want_partial_unit, |
6072 | enum language pretend_language) | |
0018ea6f | 6073 | { |
b93601f3 TT |
6074 | struct process_psymtab_comp_unit_data info; |
6075 | ||
0018ea6f DE |
6076 | /* If this compilation unit was already read in, free the |
6077 | cached copy in order to read it in again. This is | |
6078 | necessary because we skipped some symbols when we first | |
6079 | read in the compilation unit (see load_partial_dies). | |
6080 | This problem could be avoided, but the benefit is unclear. */ | |
6081 | if (this_cu->cu != NULL) | |
6082 | free_one_cached_comp_unit (this_cu); | |
6083 | ||
6084 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
6085 | info.want_partial_unit = want_partial_unit; |
6086 | info.pretend_language = pretend_language; | |
0018ea6f DE |
6087 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
6088 | process_psymtab_comp_unit_reader, | |
b93601f3 | 6089 | &info); |
0018ea6f DE |
6090 | |
6091 | /* Age out any secondary CUs. */ | |
6092 | age_cached_comp_units (); | |
6093 | } | |
f4dc4d17 DE |
6094 | |
6095 | /* Reader function for build_type_psymtabs. */ | |
6096 | ||
6097 | static void | |
6098 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6099 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6100 | struct die_info *type_unit_die, |
6101 | int has_children, | |
6102 | void *data) | |
6103 | { | |
6104 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6105 | struct dwarf2_cu *cu = reader->cu; | |
6106 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6107 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6108 | struct type_unit_group *tu_group; |
6109 | struct attribute *attr; | |
6110 | struct partial_die_info *first_die; | |
6111 | CORE_ADDR lowpc, highpc; | |
6112 | struct partial_symtab *pst; | |
6113 | ||
6114 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6115 | gdb_assert (per_cu->is_debug_types); |
6116 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6117 | |
6118 | if (! has_children) | |
6119 | return; | |
6120 | ||
6121 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6122 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6123 | |
0186c6a7 | 6124 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6125 | |
6126 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6127 | cu->list_in_scope = &file_symbols; | |
6128 | pst = create_partial_symtab (per_cu, ""); | |
6129 | pst->anonymous = 1; | |
6130 | ||
6131 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6132 | ||
6133 | lowpc = (CORE_ADDR) -1; | |
6134 | highpc = (CORE_ADDR) 0; | |
6135 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6136 | ||
8763cede | 6137 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6138 | } |
6139 | ||
73051182 DE |
6140 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6141 | ||
6142 | struct tu_abbrev_offset | |
6143 | { | |
6144 | struct signatured_type *sig_type; | |
6145 | sect_offset abbrev_offset; | |
6146 | }; | |
6147 | ||
6148 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6149 | ||
6150 | static int | |
6151 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6152 | { | |
9a3c8263 SM |
6153 | const struct tu_abbrev_offset * const *a |
6154 | = (const struct tu_abbrev_offset * const*) ap; | |
6155 | const struct tu_abbrev_offset * const *b | |
6156 | = (const struct tu_abbrev_offset * const*) bp; | |
73051182 DE |
6157 | unsigned int aoff = (*a)->abbrev_offset.sect_off; |
6158 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
6159 | ||
6160 | return (aoff > boff) - (aoff < boff); | |
6161 | } | |
6162 | ||
6163 | /* Efficiently read all the type units. | |
6164 | This does the bulk of the work for build_type_psymtabs. | |
6165 | ||
6166 | The efficiency is because we sort TUs by the abbrev table they use and | |
6167 | only read each abbrev table once. In one program there are 200K TUs | |
6168 | sharing 8K abbrev tables. | |
6169 | ||
6170 | The main purpose of this function is to support building the | |
6171 | dwarf2_per_objfile->type_unit_groups table. | |
6172 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6173 | can collapse the search space by grouping them by stmt_list. | |
6174 | The savings can be significant, in the same program from above the 200K TUs | |
6175 | share 8K stmt_list tables. | |
6176 | ||
6177 | FUNC is expected to call get_type_unit_group, which will create the | |
6178 | struct type_unit_group if necessary and add it to | |
6179 | dwarf2_per_objfile->type_unit_groups. */ | |
6180 | ||
6181 | static void | |
6182 | build_type_psymtabs_1 (void) | |
6183 | { | |
6184 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6185 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6186 | struct cleanup *cleanups; | |
6187 | struct abbrev_table *abbrev_table; | |
6188 | sect_offset abbrev_offset; | |
6189 | struct tu_abbrev_offset *sorted_by_abbrev; | |
6190 | struct type_unit_group **iter; | |
6191 | int i; | |
6192 | ||
6193 | /* It's up to the caller to not call us multiple times. */ | |
6194 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6195 | ||
6196 | if (dwarf2_per_objfile->n_type_units == 0) | |
6197 | return; | |
6198 | ||
6199 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6200 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6201 | read each abbrev table in. | |
6202 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6203 | This is simpler and efficient enough for now. | |
6204 | ||
6205 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6206 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6207 | stmt_list value too so in practice this should work well. | |
6208 | ||
6209 | The basic algorithm here is: | |
6210 | ||
6211 | sort TUs by abbrev table | |
6212 | for each TU with same abbrev table: | |
6213 | read abbrev table if first user | |
6214 | read TU top level DIE | |
6215 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6216 | call FUNC */ | |
6217 | ||
b4f54984 | 6218 | if (dwarf_read_debug) |
73051182 DE |
6219 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
6220 | ||
6221 | /* Sort in a separate table to maintain the order of all_type_units | |
6222 | for .gdb_index: TU indices directly index all_type_units. */ | |
6223 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6224 | dwarf2_per_objfile->n_type_units); | |
6225 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6226 | { | |
6227 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6228 | ||
6229 | sorted_by_abbrev[i].sig_type = sig_type; | |
6230 | sorted_by_abbrev[i].abbrev_offset = | |
6231 | read_abbrev_offset (sig_type->per_cu.section, | |
6232 | sig_type->per_cu.offset); | |
6233 | } | |
6234 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6235 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6236 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6237 | ||
6238 | abbrev_offset.sect_off = ~(unsigned) 0; | |
6239 | abbrev_table = NULL; | |
6240 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6241 | ||
6242 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6243 | { | |
6244 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6245 | ||
6246 | /* Switch to the next abbrev table if necessary. */ | |
6247 | if (abbrev_table == NULL | |
6248 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
6249 | { | |
6250 | if (abbrev_table != NULL) | |
6251 | { | |
6252 | abbrev_table_free (abbrev_table); | |
6253 | /* Reset to NULL in case abbrev_table_read_table throws | |
6254 | an error: abbrev_table_free_cleanup will get called. */ | |
6255 | abbrev_table = NULL; | |
6256 | } | |
6257 | abbrev_offset = tu->abbrev_offset; | |
6258 | abbrev_table = | |
6259 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6260 | abbrev_offset); | |
6261 | ++tu_stats->nr_uniq_abbrev_tables; | |
6262 | } | |
6263 | ||
6264 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6265 | build_type_psymtabs_reader, NULL); | |
6266 | } | |
6267 | ||
73051182 | 6268 | do_cleanups (cleanups); |
6aa5f3a6 | 6269 | } |
73051182 | 6270 | |
6aa5f3a6 DE |
6271 | /* Print collected type unit statistics. */ |
6272 | ||
6273 | static void | |
6274 | print_tu_stats (void) | |
6275 | { | |
6276 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6277 | ||
6278 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6279 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6280 | dwarf2_per_objfile->n_type_units); | |
6281 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6282 | tu_stats->nr_uniq_abbrev_tables); | |
6283 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6284 | tu_stats->nr_symtabs); | |
6285 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6286 | tu_stats->nr_symtab_sharers); | |
6287 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6288 | tu_stats->nr_stmt_less_type_units); | |
6289 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6290 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6291 | } |
6292 | ||
f4dc4d17 DE |
6293 | /* Traversal function for build_type_psymtabs. */ |
6294 | ||
6295 | static int | |
6296 | build_type_psymtab_dependencies (void **slot, void *info) | |
6297 | { | |
6298 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6299 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6300 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6301 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6302 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6303 | struct signatured_type *iter; | |
f4dc4d17 DE |
6304 | int i; |
6305 | ||
6306 | gdb_assert (len > 0); | |
0186c6a7 | 6307 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6308 | |
6309 | pst->number_of_dependencies = len; | |
8d749320 SM |
6310 | pst->dependencies = |
6311 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 6312 | for (i = 0; |
0186c6a7 | 6313 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6314 | ++i) |
6315 | { | |
0186c6a7 DE |
6316 | gdb_assert (iter->per_cu.is_debug_types); |
6317 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6318 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6319 | } |
6320 | ||
0186c6a7 | 6321 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6322 | |
6323 | return 1; | |
6324 | } | |
6325 | ||
6326 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6327 | Build partial symbol tables for the .debug_types comp-units. */ | |
6328 | ||
6329 | static void | |
6330 | build_type_psymtabs (struct objfile *objfile) | |
6331 | { | |
0e50663e | 6332 | if (! create_all_type_units (objfile)) |
348e048f DE |
6333 | return; |
6334 | ||
73051182 | 6335 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6336 | } |
f4dc4d17 | 6337 | |
6aa5f3a6 DE |
6338 | /* Traversal function for process_skeletonless_type_unit. |
6339 | Read a TU in a DWO file and build partial symbols for it. */ | |
6340 | ||
6341 | static int | |
6342 | process_skeletonless_type_unit (void **slot, void *info) | |
6343 | { | |
6344 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 6345 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
6346 | struct signatured_type find_entry, *entry; |
6347 | ||
6348 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6349 | ||
6350 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6351 | { | |
6352 | dwarf2_per_objfile->signatured_types | |
6353 | = allocate_signatured_type_table (objfile); | |
6354 | } | |
6355 | ||
6356 | find_entry.signature = dwo_unit->signature; | |
6357 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6358 | INSERT); | |
6359 | /* If we've already seen this type there's nothing to do. What's happening | |
6360 | is we're doing our own version of comdat-folding here. */ | |
6361 | if (*slot != NULL) | |
6362 | return 1; | |
6363 | ||
6364 | /* This does the job that create_all_type_units would have done for | |
6365 | this TU. */ | |
6366 | entry = add_type_unit (dwo_unit->signature, slot); | |
6367 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6368 | *slot = entry; | |
6369 | ||
6370 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6371 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6372 | build_type_psymtabs_reader, NULL); | |
6373 | ||
6374 | return 1; | |
6375 | } | |
6376 | ||
6377 | /* Traversal function for process_skeletonless_type_units. */ | |
6378 | ||
6379 | static int | |
6380 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6381 | { | |
6382 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6383 | ||
6384 | if (dwo_file->tus != NULL) | |
6385 | { | |
6386 | htab_traverse_noresize (dwo_file->tus, | |
6387 | process_skeletonless_type_unit, info); | |
6388 | } | |
6389 | ||
6390 | return 1; | |
6391 | } | |
6392 | ||
6393 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6394 | This is needed in case a TU was emitted without its skeleton. | |
6395 | Note: This can't be done until we know what all the DWO files are. */ | |
6396 | ||
6397 | static void | |
6398 | process_skeletonless_type_units (struct objfile *objfile) | |
6399 | { | |
6400 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6401 | if (get_dwp_file () == NULL | |
6402 | && dwarf2_per_objfile->dwo_files != NULL) | |
6403 | { | |
6404 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6405 | process_dwo_file_for_skeletonless_type_units, | |
6406 | objfile); | |
6407 | } | |
348e048f DE |
6408 | } |
6409 | ||
60606b2c TT |
6410 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6411 | ||
6412 | static void | |
6413 | psymtabs_addrmap_cleanup (void *o) | |
6414 | { | |
9a3c8263 | 6415 | struct objfile *objfile = (struct objfile *) o; |
ec61707d | 6416 | |
60606b2c TT |
6417 | objfile->psymtabs_addrmap = NULL; |
6418 | } | |
6419 | ||
95554aad TT |
6420 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6421 | ||
6422 | static void | |
6423 | set_partial_user (struct objfile *objfile) | |
6424 | { | |
6425 | int i; | |
6426 | ||
6427 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6428 | { | |
8832e7e3 | 6429 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6430 | struct partial_symtab *pst = per_cu->v.psymtab; |
6431 | int j; | |
6432 | ||
36586728 TT |
6433 | if (pst == NULL) |
6434 | continue; | |
6435 | ||
95554aad TT |
6436 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6437 | { | |
6438 | /* Set the 'user' field only if it is not already set. */ | |
6439 | if (pst->dependencies[j]->user == NULL) | |
6440 | pst->dependencies[j]->user = pst; | |
6441 | } | |
6442 | } | |
6443 | } | |
6444 | ||
93311388 DE |
6445 | /* Build the partial symbol table by doing a quick pass through the |
6446 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6447 | |
93311388 | 6448 | static void |
c67a9c90 | 6449 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6450 | { |
60606b2c TT |
6451 | struct cleanup *back_to, *addrmap_cleanup; |
6452 | struct obstack temp_obstack; | |
21b2bd31 | 6453 | int i; |
93311388 | 6454 | |
b4f54984 | 6455 | if (dwarf_read_debug) |
45cfd468 DE |
6456 | { |
6457 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6458 | objfile_name (objfile)); |
45cfd468 DE |
6459 | } |
6460 | ||
98bfdba5 PA |
6461 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6462 | ||
be391dca | 6463 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6464 | |
93311388 DE |
6465 | /* Any cached compilation units will be linked by the per-objfile |
6466 | read_in_chain. Make sure to free them when we're done. */ | |
6467 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6468 | |
348e048f DE |
6469 | build_type_psymtabs (objfile); |
6470 | ||
93311388 | 6471 | create_all_comp_units (objfile); |
c906108c | 6472 | |
60606b2c TT |
6473 | /* Create a temporary address map on a temporary obstack. We later |
6474 | copy this to the final obstack. */ | |
6475 | obstack_init (&temp_obstack); | |
6476 | make_cleanup_obstack_free (&temp_obstack); | |
6477 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6478 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6479 | |
21b2bd31 | 6480 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6481 | { |
8832e7e3 | 6482 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6483 | |
b93601f3 | 6484 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6485 | } |
ff013f42 | 6486 | |
6aa5f3a6 DE |
6487 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6488 | process_skeletonless_type_units (objfile); | |
6489 | ||
6490 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6491 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6492 | { | |
6493 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6494 | build_type_psymtab_dependencies, NULL); | |
6495 | } | |
6496 | ||
b4f54984 | 6497 | if (dwarf_read_debug) |
6aa5f3a6 DE |
6498 | print_tu_stats (); |
6499 | ||
95554aad TT |
6500 | set_partial_user (objfile); |
6501 | ||
ff013f42 JK |
6502 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6503 | &objfile->objfile_obstack); | |
60606b2c | 6504 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6505 | |
ae038cb0 | 6506 | do_cleanups (back_to); |
45cfd468 | 6507 | |
b4f54984 | 6508 | if (dwarf_read_debug) |
45cfd468 | 6509 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 6510 | objfile_name (objfile)); |
ae038cb0 DJ |
6511 | } |
6512 | ||
3019eac3 | 6513 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6514 | |
6515 | static void | |
dee91e82 | 6516 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6517 | const gdb_byte *info_ptr, |
dee91e82 DE |
6518 | struct die_info *comp_unit_die, |
6519 | int has_children, | |
6520 | void *data) | |
ae038cb0 | 6521 | { |
dee91e82 | 6522 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6523 | |
95554aad | 6524 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6525 | |
ae038cb0 DJ |
6526 | /* Check if comp unit has_children. |
6527 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6528 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6529 | if (has_children) |
dee91e82 DE |
6530 | load_partial_dies (reader, info_ptr, 0); |
6531 | } | |
98bfdba5 | 6532 | |
dee91e82 DE |
6533 | /* Load the partial DIEs for a secondary CU into memory. |
6534 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6535 | |
dee91e82 DE |
6536 | static void |
6537 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6538 | { | |
f4dc4d17 DE |
6539 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6540 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6541 | } |
6542 | ||
ae038cb0 | 6543 | static void |
36586728 TT |
6544 | read_comp_units_from_section (struct objfile *objfile, |
6545 | struct dwarf2_section_info *section, | |
6546 | unsigned int is_dwz, | |
6547 | int *n_allocated, | |
6548 | int *n_comp_units, | |
6549 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6550 | { |
d521ce57 | 6551 | const gdb_byte *info_ptr; |
a32a8923 | 6552 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6553 | |
b4f54984 | 6554 | if (dwarf_read_debug) |
bf6af496 | 6555 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
6556 | get_section_name (section), |
6557 | get_section_file_name (section)); | |
bf6af496 | 6558 | |
36586728 | 6559 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6560 | |
36586728 | 6561 | info_ptr = section->buffer; |
6e70227d | 6562 | |
36586728 | 6563 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6564 | { |
c764a876 | 6565 | unsigned int length, initial_length_size; |
ae038cb0 | 6566 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6567 | sect_offset offset; |
ae038cb0 | 6568 | |
36586728 | 6569 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6570 | |
6571 | /* Read just enough information to find out where the next | |
6572 | compilation unit is. */ | |
36586728 | 6573 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6574 | |
6575 | /* Save the compilation unit for later lookup. */ | |
8d749320 | 6576 | this_cu = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_cu_data); |
ae038cb0 DJ |
6577 | memset (this_cu, 0, sizeof (*this_cu)); |
6578 | this_cu->offset = offset; | |
c764a876 | 6579 | this_cu->length = length + initial_length_size; |
36586728 | 6580 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6581 | this_cu->objfile = objfile; |
8a0459fd | 6582 | this_cu->section = section; |
ae038cb0 | 6583 | |
36586728 | 6584 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6585 | { |
36586728 | 6586 | *n_allocated *= 2; |
224c3ddb SM |
6587 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
6588 | *all_comp_units, *n_allocated); | |
ae038cb0 | 6589 | } |
36586728 TT |
6590 | (*all_comp_units)[*n_comp_units] = this_cu; |
6591 | ++*n_comp_units; | |
ae038cb0 DJ |
6592 | |
6593 | info_ptr = info_ptr + this_cu->length; | |
6594 | } | |
36586728 TT |
6595 | } |
6596 | ||
6597 | /* Create a list of all compilation units in OBJFILE. | |
6598 | This is only done for -readnow and building partial symtabs. */ | |
6599 | ||
6600 | static void | |
6601 | create_all_comp_units (struct objfile *objfile) | |
6602 | { | |
6603 | int n_allocated; | |
6604 | int n_comp_units; | |
6605 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6606 | struct dwz_file *dwz; |
36586728 TT |
6607 | |
6608 | n_comp_units = 0; | |
6609 | n_allocated = 10; | |
8d749320 | 6610 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 TT |
6611 | |
6612 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6613 | &n_allocated, &n_comp_units, &all_comp_units); | |
6614 | ||
4db1a1dc TT |
6615 | dwz = dwarf2_get_dwz_file (); |
6616 | if (dwz != NULL) | |
6617 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6618 | &n_allocated, &n_comp_units, | |
6619 | &all_comp_units); | |
ae038cb0 | 6620 | |
8d749320 SM |
6621 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
6622 | struct dwarf2_per_cu_data *, | |
6623 | n_comp_units); | |
ae038cb0 DJ |
6624 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
6625 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6626 | xfree (all_comp_units); | |
6627 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6628 | } |
6629 | ||
5734ee8b | 6630 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6631 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6632 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6633 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6634 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6635 | |
72bf9492 DJ |
6636 | static void |
6637 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6638 | CORE_ADDR *highpc, int set_addrmap, |
6639 | struct dwarf2_cu *cu) | |
c906108c | 6640 | { |
72bf9492 | 6641 | struct partial_die_info *pdi; |
c906108c | 6642 | |
91c24f0a DC |
6643 | /* Now, march along the PDI's, descending into ones which have |
6644 | interesting children but skipping the children of the other ones, | |
6645 | until we reach the end of the compilation unit. */ | |
c906108c | 6646 | |
72bf9492 | 6647 | pdi = first_die; |
91c24f0a | 6648 | |
72bf9492 DJ |
6649 | while (pdi != NULL) |
6650 | { | |
6651 | fixup_partial_die (pdi, cu); | |
c906108c | 6652 | |
f55ee35c | 6653 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6654 | children, so we need to look at them. Ditto for anonymous |
6655 | enums. */ | |
933c6fe4 | 6656 | |
72bf9492 | 6657 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6658 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6659 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6660 | { |
72bf9492 | 6661 | switch (pdi->tag) |
c906108c SS |
6662 | { |
6663 | case DW_TAG_subprogram: | |
cdc07690 | 6664 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6665 | break; |
72929c62 | 6666 | case DW_TAG_constant: |
c906108c SS |
6667 | case DW_TAG_variable: |
6668 | case DW_TAG_typedef: | |
91c24f0a | 6669 | case DW_TAG_union_type: |
72bf9492 | 6670 | if (!pdi->is_declaration) |
63d06c5c | 6671 | { |
72bf9492 | 6672 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6673 | } |
6674 | break; | |
c906108c | 6675 | case DW_TAG_class_type: |
680b30c7 | 6676 | case DW_TAG_interface_type: |
c906108c | 6677 | case DW_TAG_structure_type: |
72bf9492 | 6678 | if (!pdi->is_declaration) |
c906108c | 6679 | { |
72bf9492 | 6680 | add_partial_symbol (pdi, cu); |
c906108c SS |
6681 | } |
6682 | break; | |
91c24f0a | 6683 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6684 | if (!pdi->is_declaration) |
6685 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6686 | break; |
6687 | case DW_TAG_base_type: | |
a02abb62 | 6688 | case DW_TAG_subrange_type: |
c906108c | 6689 | /* File scope base type definitions are added to the partial |
c5aa993b | 6690 | symbol table. */ |
72bf9492 | 6691 | add_partial_symbol (pdi, cu); |
c906108c | 6692 | break; |
d9fa45fe | 6693 | case DW_TAG_namespace: |
cdc07690 | 6694 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6695 | break; |
5d7cb8df | 6696 | case DW_TAG_module: |
cdc07690 | 6697 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6698 | break; |
95554aad TT |
6699 | case DW_TAG_imported_unit: |
6700 | { | |
6701 | struct dwarf2_per_cu_data *per_cu; | |
6702 | ||
f4dc4d17 DE |
6703 | /* For now we don't handle imported units in type units. */ |
6704 | if (cu->per_cu->is_debug_types) | |
6705 | { | |
6706 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6707 | " supported in type units [in module %s]"), | |
4262abfb | 6708 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6709 | } |
6710 | ||
95554aad | 6711 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6712 | pdi->is_dwz, |
95554aad TT |
6713 | cu->objfile); |
6714 | ||
6715 | /* Go read the partial unit, if needed. */ | |
6716 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6717 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6718 | |
f4dc4d17 | 6719 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6720 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6721 | } |
6722 | break; | |
74921315 KS |
6723 | case DW_TAG_imported_declaration: |
6724 | add_partial_symbol (pdi, cu); | |
6725 | break; | |
c906108c SS |
6726 | default: |
6727 | break; | |
6728 | } | |
6729 | } | |
6730 | ||
72bf9492 DJ |
6731 | /* If the die has a sibling, skip to the sibling. */ |
6732 | ||
6733 | pdi = pdi->die_sibling; | |
6734 | } | |
6735 | } | |
6736 | ||
6737 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6738 | |
72bf9492 | 6739 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
6740 | name is concatenated with "::" and the partial DIE's name. For |
6741 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
6742 | Enumerators are an exception; they use the scope of their parent |
6743 | enumeration type, i.e. the name of the enumeration type is not | |
6744 | prepended to the enumerator. | |
91c24f0a | 6745 | |
72bf9492 DJ |
6746 | There are two complexities. One is DW_AT_specification; in this |
6747 | case "parent" means the parent of the target of the specification, | |
6748 | instead of the direct parent of the DIE. The other is compilers | |
6749 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6750 | the fully qualified name of structure types from their members' | |
6751 | linkage names. This must be done using the DIE's children rather | |
6752 | than the children of any DW_AT_specification target. We only need | |
6753 | to do this for structures at the top level, i.e. if the target of | |
6754 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6755 | have a parent. */ | |
6756 | ||
6757 | /* Compute the scope prefix associated with PDI's parent, in | |
6758 | compilation unit CU. The result will be allocated on CU's | |
6759 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6760 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6761 | static const char * |
72bf9492 DJ |
6762 | partial_die_parent_scope (struct partial_die_info *pdi, |
6763 | struct dwarf2_cu *cu) | |
6764 | { | |
15d034d0 | 6765 | const char *grandparent_scope; |
72bf9492 | 6766 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6767 | |
72bf9492 DJ |
6768 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6769 | then this means the parent of the specification DIE. */ | |
6770 | ||
6771 | real_pdi = pdi; | |
72bf9492 | 6772 | while (real_pdi->has_specification) |
36586728 TT |
6773 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6774 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6775 | |
6776 | parent = real_pdi->die_parent; | |
6777 | if (parent == NULL) | |
6778 | return NULL; | |
6779 | ||
6780 | if (parent->scope_set) | |
6781 | return parent->scope; | |
6782 | ||
6783 | fixup_partial_die (parent, cu); | |
6784 | ||
10b3939b | 6785 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6786 | |
acebe513 UW |
6787 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6788 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6789 | Work around this problem here. */ | |
6790 | if (cu->language == language_cplus | |
6e70227d | 6791 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6792 | && strcmp (parent->name, "::") == 0 |
6793 | && grandparent_scope == NULL) | |
6794 | { | |
6795 | parent->scope = NULL; | |
6796 | parent->scope_set = 1; | |
6797 | return NULL; | |
6798 | } | |
6799 | ||
9c6c53f7 SA |
6800 | if (pdi->tag == DW_TAG_enumerator) |
6801 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6802 | parent->scope = grandparent_scope; | |
6803 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6804 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6805 | || parent->tag == DW_TAG_structure_type |
6806 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6807 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6808 | || parent->tag == DW_TAG_union_type |
6809 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6810 | { |
6811 | if (grandparent_scope == NULL) | |
6812 | parent->scope = parent->name; | |
6813 | else | |
3e43a32a MS |
6814 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6815 | grandparent_scope, | |
f55ee35c | 6816 | parent->name, 0, cu); |
72bf9492 | 6817 | } |
72bf9492 DJ |
6818 | else |
6819 | { | |
6820 | /* FIXME drow/2004-04-01: What should we be doing with | |
6821 | function-local names? For partial symbols, we should probably be | |
6822 | ignoring them. */ | |
6823 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6824 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6825 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6826 | parent->scope = grandparent_scope; |
c906108c SS |
6827 | } |
6828 | ||
72bf9492 DJ |
6829 | parent->scope_set = 1; |
6830 | return parent->scope; | |
6831 | } | |
6832 | ||
6833 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6834 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6835 | |
72bf9492 DJ |
6836 | static char * |
6837 | partial_die_full_name (struct partial_die_info *pdi, | |
6838 | struct dwarf2_cu *cu) | |
6839 | { | |
15d034d0 | 6840 | const char *parent_scope; |
72bf9492 | 6841 | |
98bfdba5 PA |
6842 | /* If this is a template instantiation, we can not work out the |
6843 | template arguments from partial DIEs. So, unfortunately, we have | |
6844 | to go through the full DIEs. At least any work we do building | |
6845 | types here will be reused if full symbols are loaded later. */ | |
6846 | if (pdi->has_template_arguments) | |
6847 | { | |
6848 | fixup_partial_die (pdi, cu); | |
6849 | ||
6850 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6851 | { | |
6852 | struct die_info *die; | |
6853 | struct attribute attr; | |
6854 | struct dwarf2_cu *ref_cu = cu; | |
6855 | ||
b64f50a1 | 6856 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 6857 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 6858 | attr.form = DW_FORM_ref_addr; |
4568ecf9 | 6859 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6860 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6861 | ||
6862 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6863 | } | |
6864 | } | |
6865 | ||
72bf9492 DJ |
6866 | parent_scope = partial_die_parent_scope (pdi, cu); |
6867 | if (parent_scope == NULL) | |
6868 | return NULL; | |
6869 | else | |
f55ee35c | 6870 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6871 | } |
6872 | ||
6873 | static void | |
72bf9492 | 6874 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6875 | { |
e7c27a73 | 6876 | struct objfile *objfile = cu->objfile; |
3e29f34a | 6877 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 6878 | CORE_ADDR addr = 0; |
15d034d0 | 6879 | const char *actual_name = NULL; |
e142c38c | 6880 | CORE_ADDR baseaddr; |
15d034d0 | 6881 | char *built_actual_name; |
e142c38c DJ |
6882 | |
6883 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6884 | |
15d034d0 TT |
6885 | built_actual_name = partial_die_full_name (pdi, cu); |
6886 | if (built_actual_name != NULL) | |
6887 | actual_name = built_actual_name; | |
63d06c5c | 6888 | |
72bf9492 DJ |
6889 | if (actual_name == NULL) |
6890 | actual_name = pdi->name; | |
6891 | ||
c906108c SS |
6892 | switch (pdi->tag) |
6893 | { | |
6894 | case DW_TAG_subprogram: | |
3e29f34a | 6895 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 6896 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6897 | { |
2cfa0c8d JB |
6898 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6899 | of the global scope. But in Ada, we want to be able to access | |
6900 | nested procedures globally. So all Ada subprograms are stored | |
6901 | in the global scope. */ | |
f47fb265 | 6902 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6903 | built_actual_name != NULL, |
f47fb265 MS |
6904 | VAR_DOMAIN, LOC_BLOCK, |
6905 | &objfile->global_psymbols, | |
1762568f | 6906 | addr, cu->language, objfile); |
c906108c SS |
6907 | } |
6908 | else | |
6909 | { | |
f47fb265 | 6910 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6911 | built_actual_name != NULL, |
f47fb265 MS |
6912 | VAR_DOMAIN, LOC_BLOCK, |
6913 | &objfile->static_psymbols, | |
1762568f | 6914 | addr, cu->language, objfile); |
c906108c SS |
6915 | } |
6916 | break; | |
72929c62 JB |
6917 | case DW_TAG_constant: |
6918 | { | |
6919 | struct psymbol_allocation_list *list; | |
6920 | ||
6921 | if (pdi->is_external) | |
6922 | list = &objfile->global_psymbols; | |
6923 | else | |
6924 | list = &objfile->static_psymbols; | |
f47fb265 | 6925 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6926 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 6927 | list, 0, cu->language, objfile); |
72929c62 JB |
6928 | } |
6929 | break; | |
c906108c | 6930 | case DW_TAG_variable: |
95554aad TT |
6931 | if (pdi->d.locdesc) |
6932 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6933 | |
95554aad | 6934 | if (pdi->d.locdesc |
caac4577 JG |
6935 | && addr == 0 |
6936 | && !dwarf2_per_objfile->has_section_at_zero) | |
6937 | { | |
6938 | /* A global or static variable may also have been stripped | |
6939 | out by the linker if unused, in which case its address | |
6940 | will be nullified; do not add such variables into partial | |
6941 | symbol table then. */ | |
6942 | } | |
6943 | else if (pdi->is_external) | |
c906108c SS |
6944 | { |
6945 | /* Global Variable. | |
6946 | Don't enter into the minimal symbol tables as there is | |
6947 | a minimal symbol table entry from the ELF symbols already. | |
6948 | Enter into partial symbol table if it has a location | |
6949 | descriptor or a type. | |
6950 | If the location descriptor is missing, new_symbol will create | |
6951 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6952 | be determined from the minimal symbol table whenever the variable | |
6953 | is referenced. | |
6954 | The address for the partial symbol table entry is not | |
6955 | used by GDB, but it comes in handy for debugging partial symbol | |
6956 | table building. */ | |
6957 | ||
95554aad | 6958 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6959 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6960 | built_actual_name != NULL, |
f47fb265 MS |
6961 | VAR_DOMAIN, LOC_STATIC, |
6962 | &objfile->global_psymbols, | |
1762568f | 6963 | addr + baseaddr, |
f47fb265 | 6964 | cu->language, objfile); |
c906108c SS |
6965 | } |
6966 | else | |
6967 | { | |
ff908ebf AW |
6968 | int has_loc = pdi->d.locdesc != NULL; |
6969 | ||
6970 | /* Static Variable. Skip symbols whose value we cannot know (those | |
6971 | without location descriptors or constant values). */ | |
6972 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 6973 | { |
15d034d0 | 6974 | xfree (built_actual_name); |
decbce07 MS |
6975 | return; |
6976 | } | |
ff908ebf | 6977 | |
f47fb265 | 6978 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6979 | built_actual_name != NULL, |
f47fb265 MS |
6980 | VAR_DOMAIN, LOC_STATIC, |
6981 | &objfile->static_psymbols, | |
ff908ebf | 6982 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 6983 | cu->language, objfile); |
c906108c SS |
6984 | } |
6985 | break; | |
6986 | case DW_TAG_typedef: | |
6987 | case DW_TAG_base_type: | |
a02abb62 | 6988 | case DW_TAG_subrange_type: |
38d518c9 | 6989 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6990 | built_actual_name != NULL, |
176620f1 | 6991 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6992 | &objfile->static_psymbols, |
1762568f | 6993 | 0, cu->language, objfile); |
c906108c | 6994 | break; |
74921315 | 6995 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
6996 | case DW_TAG_namespace: |
6997 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6998 | built_actual_name != NULL, |
72bf9492 DJ |
6999 | VAR_DOMAIN, LOC_TYPEDEF, |
7000 | &objfile->global_psymbols, | |
1762568f | 7001 | 0, cu->language, objfile); |
72bf9492 | 7002 | break; |
530e8392 KB |
7003 | case DW_TAG_module: |
7004 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7005 | built_actual_name != NULL, | |
7006 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7007 | &objfile->global_psymbols, | |
1762568f | 7008 | 0, cu->language, objfile); |
530e8392 | 7009 | break; |
c906108c | 7010 | case DW_TAG_class_type: |
680b30c7 | 7011 | case DW_TAG_interface_type: |
c906108c SS |
7012 | case DW_TAG_structure_type: |
7013 | case DW_TAG_union_type: | |
7014 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7015 | /* Skip external references. The DWARF standard says in the section |
7016 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7017 | structure, union or class type is represented by a structure, | |
7018 | union or class entry that does not have a byte size attribute | |
7019 | and that has a DW_AT_declaration attribute." */ | |
7020 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7021 | { |
15d034d0 | 7022 | xfree (built_actual_name); |
decbce07 MS |
7023 | return; |
7024 | } | |
fa4028e9 | 7025 | |
63d06c5c DC |
7026 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7027 | static vs. global. */ | |
38d518c9 | 7028 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7029 | built_actual_name != NULL, |
176620f1 | 7030 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
7031 | (cu->language == language_cplus |
7032 | || cu->language == language_java) | |
63d06c5c DC |
7033 | ? &objfile->global_psymbols |
7034 | : &objfile->static_psymbols, | |
1762568f | 7035 | 0, cu->language, objfile); |
c906108c | 7036 | |
c906108c SS |
7037 | break; |
7038 | case DW_TAG_enumerator: | |
38d518c9 | 7039 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7040 | built_actual_name != NULL, |
176620f1 | 7041 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
7042 | (cu->language == language_cplus |
7043 | || cu->language == language_java) | |
f6fe98ef DJ |
7044 | ? &objfile->global_psymbols |
7045 | : &objfile->static_psymbols, | |
1762568f | 7046 | 0, cu->language, objfile); |
c906108c SS |
7047 | break; |
7048 | default: | |
7049 | break; | |
7050 | } | |
5c4e30ca | 7051 | |
15d034d0 | 7052 | xfree (built_actual_name); |
c906108c SS |
7053 | } |
7054 | ||
5c4e30ca DC |
7055 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7056 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7057 | the name of the enclosing namespace. */ | |
91c24f0a | 7058 | |
72bf9492 DJ |
7059 | static void |
7060 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7061 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7062 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7063 | { |
72bf9492 | 7064 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7065 | |
72bf9492 | 7066 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7067 | |
7068 | /* Now scan partial symbols in that namespace. */ | |
7069 | ||
91c24f0a | 7070 | if (pdi->has_children) |
cdc07690 | 7071 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7072 | } |
7073 | ||
5d7cb8df JK |
7074 | /* Read a partial die corresponding to a Fortran module. */ |
7075 | ||
7076 | static void | |
7077 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7078 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7079 | { |
530e8392 KB |
7080 | /* Add a symbol for the namespace. */ |
7081 | ||
7082 | add_partial_symbol (pdi, cu); | |
7083 | ||
f55ee35c | 7084 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7085 | |
7086 | if (pdi->has_children) | |
cdc07690 | 7087 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7088 | } |
7089 | ||
bc30ff58 JB |
7090 | /* Read a partial die corresponding to a subprogram and create a partial |
7091 | symbol for that subprogram. When the CU language allows it, this | |
7092 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7093 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7094 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7095 | and highest PC values found in PDI. | |
6e70227d | 7096 | |
cdc07690 YQ |
7097 | PDI may also be a lexical block, in which case we simply search |
7098 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7099 | Again, this is only performed when the CU language allows this |
7100 | type of definitions. */ | |
7101 | ||
7102 | static void | |
7103 | add_partial_subprogram (struct partial_die_info *pdi, | |
7104 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7105 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7106 | { |
7107 | if (pdi->tag == DW_TAG_subprogram) | |
7108 | { | |
7109 | if (pdi->has_pc_info) | |
7110 | { | |
7111 | if (pdi->lowpc < *lowpc) | |
7112 | *lowpc = pdi->lowpc; | |
7113 | if (pdi->highpc > *highpc) | |
7114 | *highpc = pdi->highpc; | |
cdc07690 | 7115 | if (set_addrmap) |
5734ee8b | 7116 | { |
5734ee8b | 7117 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7118 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7119 | CORE_ADDR baseaddr; | |
7120 | CORE_ADDR highpc; | |
7121 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7122 | |
7123 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7124 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7125 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7126 | pdi->lowpc + baseaddr); | |
7127 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7128 | pdi->highpc + baseaddr); | |
7129 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7130 | cu->per_cu->v.psymtab); |
5734ee8b | 7131 | } |
481860b3 GB |
7132 | } |
7133 | ||
7134 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7135 | { | |
bc30ff58 | 7136 | if (!pdi->is_declaration) |
e8d05480 JB |
7137 | /* Ignore subprogram DIEs that do not have a name, they are |
7138 | illegal. Do not emit a complaint at this point, we will | |
7139 | do so when we convert this psymtab into a symtab. */ | |
7140 | if (pdi->name) | |
7141 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7142 | } |
7143 | } | |
6e70227d | 7144 | |
bc30ff58 JB |
7145 | if (! pdi->has_children) |
7146 | return; | |
7147 | ||
7148 | if (cu->language == language_ada) | |
7149 | { | |
7150 | pdi = pdi->die_child; | |
7151 | while (pdi != NULL) | |
7152 | { | |
7153 | fixup_partial_die (pdi, cu); | |
7154 | if (pdi->tag == DW_TAG_subprogram | |
7155 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7156 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7157 | pdi = pdi->die_sibling; |
7158 | } | |
7159 | } | |
7160 | } | |
7161 | ||
91c24f0a DC |
7162 | /* Read a partial die corresponding to an enumeration type. */ |
7163 | ||
72bf9492 DJ |
7164 | static void |
7165 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7166 | struct dwarf2_cu *cu) | |
91c24f0a | 7167 | { |
72bf9492 | 7168 | struct partial_die_info *pdi; |
91c24f0a DC |
7169 | |
7170 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7171 | add_partial_symbol (enum_pdi, cu); |
7172 | ||
7173 | pdi = enum_pdi->die_child; | |
7174 | while (pdi) | |
91c24f0a | 7175 | { |
72bf9492 | 7176 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7177 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7178 | else |
72bf9492 DJ |
7179 | add_partial_symbol (pdi, cu); |
7180 | pdi = pdi->die_sibling; | |
91c24f0a | 7181 | } |
91c24f0a DC |
7182 | } |
7183 | ||
6caca83c CC |
7184 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7185 | ||
7186 | static unsigned int | |
d521ce57 | 7187 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7188 | { |
7189 | unsigned int bytes_read; | |
7190 | ||
7191 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7192 | } | |
7193 | ||
4bb7a0a7 DJ |
7194 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7195 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7196 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7197 | the initial number. */ | |
7198 | ||
7199 | static struct abbrev_info * | |
d521ce57 | 7200 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7201 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7202 | { |
7203 | bfd *abfd = cu->objfile->obfd; | |
7204 | unsigned int abbrev_number; | |
7205 | struct abbrev_info *abbrev; | |
7206 | ||
7207 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7208 | ||
7209 | if (abbrev_number == 0) | |
7210 | return NULL; | |
7211 | ||
433df2d4 | 7212 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7213 | if (!abbrev) |
7214 | { | |
422b9917 DE |
7215 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
7216 | " at offset 0x%x [in module %s]"), | |
7217 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
7218 | cu->header.offset.sect_off, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
7219 | } |
7220 | ||
7221 | return abbrev; | |
7222 | } | |
7223 | ||
93311388 DE |
7224 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7225 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7226 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7227 | ||
d521ce57 TT |
7228 | static const gdb_byte * |
7229 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7230 | { |
dee91e82 | 7231 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7232 | struct abbrev_info *abbrev; |
7233 | unsigned int bytes_read; | |
7234 | ||
7235 | while (1) | |
7236 | { | |
7237 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7238 | if (abbrev == NULL) | |
7239 | return info_ptr + bytes_read; | |
7240 | else | |
dee91e82 | 7241 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7242 | } |
7243 | } | |
7244 | ||
93311388 DE |
7245 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7246 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7247 | abbrev corresponding to that skipped uleb128 should be passed in |
7248 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7249 | children. */ | |
7250 | ||
d521ce57 TT |
7251 | static const gdb_byte * |
7252 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7253 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7254 | { |
7255 | unsigned int bytes_read; | |
7256 | struct attribute attr; | |
dee91e82 DE |
7257 | bfd *abfd = reader->abfd; |
7258 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7259 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7260 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 7261 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
7262 | unsigned int form, i; |
7263 | ||
7264 | for (i = 0; i < abbrev->num_attrs; i++) | |
7265 | { | |
7266 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7267 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7268 | { | |
dee91e82 | 7269 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7270 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7271 | complaint (&symfile_complaints, |
7272 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7273 | else |
b9502d3f WN |
7274 | { |
7275 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
7276 | const gdb_byte *sibling_ptr = buffer + off; | |
7277 | ||
7278 | if (sibling_ptr < info_ptr) | |
7279 | complaint (&symfile_complaints, | |
7280 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7281 | else if (sibling_ptr > reader->buffer_end) |
7282 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7283 | else |
7284 | return sibling_ptr; | |
7285 | } | |
4bb7a0a7 DJ |
7286 | } |
7287 | ||
7288 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7289 | form = abbrev->attrs[i].form; | |
7290 | skip_attribute: | |
7291 | switch (form) | |
7292 | { | |
4bb7a0a7 | 7293 | case DW_FORM_ref_addr: |
ae411497 TT |
7294 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7295 | and later it is offset sized. */ | |
7296 | if (cu->header.version == 2) | |
7297 | info_ptr += cu->header.addr_size; | |
7298 | else | |
7299 | info_ptr += cu->header.offset_size; | |
7300 | break; | |
36586728 TT |
7301 | case DW_FORM_GNU_ref_alt: |
7302 | info_ptr += cu->header.offset_size; | |
7303 | break; | |
ae411497 | 7304 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7305 | info_ptr += cu->header.addr_size; |
7306 | break; | |
7307 | case DW_FORM_data1: | |
7308 | case DW_FORM_ref1: | |
7309 | case DW_FORM_flag: | |
7310 | info_ptr += 1; | |
7311 | break; | |
2dc7f7b3 TT |
7312 | case DW_FORM_flag_present: |
7313 | break; | |
4bb7a0a7 DJ |
7314 | case DW_FORM_data2: |
7315 | case DW_FORM_ref2: | |
7316 | info_ptr += 2; | |
7317 | break; | |
7318 | case DW_FORM_data4: | |
7319 | case DW_FORM_ref4: | |
7320 | info_ptr += 4; | |
7321 | break; | |
7322 | case DW_FORM_data8: | |
7323 | case DW_FORM_ref8: | |
55f1336d | 7324 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7325 | info_ptr += 8; |
7326 | break; | |
7327 | case DW_FORM_string: | |
9b1c24c8 | 7328 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7329 | info_ptr += bytes_read; |
7330 | break; | |
2dc7f7b3 | 7331 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7332 | case DW_FORM_strp: |
36586728 | 7333 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7334 | info_ptr += cu->header.offset_size; |
7335 | break; | |
2dc7f7b3 | 7336 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7337 | case DW_FORM_block: |
7338 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7339 | info_ptr += bytes_read; | |
7340 | break; | |
7341 | case DW_FORM_block1: | |
7342 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7343 | break; | |
7344 | case DW_FORM_block2: | |
7345 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7346 | break; | |
7347 | case DW_FORM_block4: | |
7348 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7349 | break; | |
7350 | case DW_FORM_sdata: | |
7351 | case DW_FORM_udata: | |
7352 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7353 | case DW_FORM_GNU_addr_index: |
7354 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7355 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7356 | break; |
7357 | case DW_FORM_indirect: | |
7358 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7359 | info_ptr += bytes_read; | |
7360 | /* We need to continue parsing from here, so just go back to | |
7361 | the top. */ | |
7362 | goto skip_attribute; | |
7363 | ||
7364 | default: | |
3e43a32a MS |
7365 | error (_("Dwarf Error: Cannot handle %s " |
7366 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7367 | dwarf_form_name (form), |
7368 | bfd_get_filename (abfd)); | |
7369 | } | |
7370 | } | |
7371 | ||
7372 | if (abbrev->has_children) | |
dee91e82 | 7373 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7374 | else |
7375 | return info_ptr; | |
7376 | } | |
7377 | ||
93311388 | 7378 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7379 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7380 | |
d521ce57 | 7381 | static const gdb_byte * |
dee91e82 DE |
7382 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7383 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7384 | const gdb_byte *info_ptr) |
91c24f0a DC |
7385 | { |
7386 | /* Do we know the sibling already? */ | |
72bf9492 | 7387 | |
91c24f0a DC |
7388 | if (orig_pdi->sibling) |
7389 | return orig_pdi->sibling; | |
7390 | ||
7391 | /* Are there any children to deal with? */ | |
7392 | ||
7393 | if (!orig_pdi->has_children) | |
7394 | return info_ptr; | |
7395 | ||
4bb7a0a7 | 7396 | /* Skip the children the long way. */ |
91c24f0a | 7397 | |
dee91e82 | 7398 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7399 | } |
7400 | ||
257e7a09 | 7401 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7402 | not NULL. */ |
c906108c SS |
7403 | |
7404 | static void | |
257e7a09 YQ |
7405 | dwarf2_read_symtab (struct partial_symtab *self, |
7406 | struct objfile *objfile) | |
c906108c | 7407 | { |
257e7a09 | 7408 | if (self->readin) |
c906108c | 7409 | { |
442e4d9c | 7410 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7411 | self->filename); |
442e4d9c YQ |
7412 | } |
7413 | else | |
7414 | { | |
7415 | if (info_verbose) | |
c906108c | 7416 | { |
442e4d9c | 7417 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7418 | self->filename); |
442e4d9c | 7419 | gdb_flush (gdb_stdout); |
c906108c | 7420 | } |
c906108c | 7421 | |
442e4d9c | 7422 | /* Restore our global data. */ |
9a3c8263 SM |
7423 | dwarf2_per_objfile |
7424 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
7425 | dwarf2_objfile_data_key); | |
10b3939b | 7426 | |
442e4d9c YQ |
7427 | /* If this psymtab is constructed from a debug-only objfile, the |
7428 | has_section_at_zero flag will not necessarily be correct. We | |
7429 | can get the correct value for this flag by looking at the data | |
7430 | associated with the (presumably stripped) associated objfile. */ | |
7431 | if (objfile->separate_debug_objfile_backlink) | |
7432 | { | |
7433 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
7434 | = ((struct dwarf2_per_objfile *) |
7435 | objfile_data (objfile->separate_debug_objfile_backlink, | |
7436 | dwarf2_objfile_data_key)); | |
9a619af0 | 7437 | |
442e4d9c YQ |
7438 | dwarf2_per_objfile->has_section_at_zero |
7439 | = dpo_backlink->has_section_at_zero; | |
7440 | } | |
b2ab525c | 7441 | |
442e4d9c | 7442 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7443 | |
257e7a09 | 7444 | psymtab_to_symtab_1 (self); |
c906108c | 7445 | |
442e4d9c YQ |
7446 | /* Finish up the debug error message. */ |
7447 | if (info_verbose) | |
7448 | printf_filtered (_("done.\n")); | |
c906108c | 7449 | } |
95554aad TT |
7450 | |
7451 | process_cu_includes (); | |
c906108c | 7452 | } |
9cdd5dbd DE |
7453 | \f |
7454 | /* Reading in full CUs. */ | |
c906108c | 7455 | |
10b3939b DJ |
7456 | /* Add PER_CU to the queue. */ |
7457 | ||
7458 | static void | |
95554aad TT |
7459 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7460 | enum language pretend_language) | |
10b3939b DJ |
7461 | { |
7462 | struct dwarf2_queue_item *item; | |
7463 | ||
7464 | per_cu->queued = 1; | |
8d749320 | 7465 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 7466 | item->per_cu = per_cu; |
95554aad | 7467 | item->pretend_language = pretend_language; |
10b3939b DJ |
7468 | item->next = NULL; |
7469 | ||
7470 | if (dwarf2_queue == NULL) | |
7471 | dwarf2_queue = item; | |
7472 | else | |
7473 | dwarf2_queue_tail->next = item; | |
7474 | ||
7475 | dwarf2_queue_tail = item; | |
7476 | } | |
7477 | ||
89e63ee4 DE |
7478 | /* If PER_CU is not yet queued, add it to the queue. |
7479 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7480 | dependency. | |
0907af0c | 7481 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7482 | meaning either PER_CU is already queued or it is already loaded. |
7483 | ||
7484 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7485 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7486 | |
7487 | static int | |
89e63ee4 | 7488 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7489 | struct dwarf2_per_cu_data *per_cu, |
7490 | enum language pretend_language) | |
7491 | { | |
7492 | /* We may arrive here during partial symbol reading, if we need full | |
7493 | DIEs to process an unusual case (e.g. template arguments). Do | |
7494 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7495 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7496 | { | |
7497 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7498 | return 1; | |
7499 | return 0; | |
7500 | } | |
7501 | ||
7502 | /* Mark the dependence relation so that we don't flush PER_CU | |
7503 | too early. */ | |
89e63ee4 DE |
7504 | if (dependent_cu != NULL) |
7505 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7506 | |
7507 | /* If it's already on the queue, we have nothing to do. */ | |
7508 | if (per_cu->queued) | |
7509 | return 0; | |
7510 | ||
7511 | /* If the compilation unit is already loaded, just mark it as | |
7512 | used. */ | |
7513 | if (per_cu->cu != NULL) | |
7514 | { | |
7515 | per_cu->cu->last_used = 0; | |
7516 | return 0; | |
7517 | } | |
7518 | ||
7519 | /* Add it to the queue. */ | |
7520 | queue_comp_unit (per_cu, pretend_language); | |
7521 | ||
7522 | return 1; | |
7523 | } | |
7524 | ||
10b3939b DJ |
7525 | /* Process the queue. */ |
7526 | ||
7527 | static void | |
a0f42c21 | 7528 | process_queue (void) |
10b3939b DJ |
7529 | { |
7530 | struct dwarf2_queue_item *item, *next_item; | |
7531 | ||
b4f54984 | 7532 | if (dwarf_read_debug) |
45cfd468 DE |
7533 | { |
7534 | fprintf_unfiltered (gdb_stdlog, | |
7535 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7536 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7537 | } |
7538 | ||
03dd20cc DJ |
7539 | /* The queue starts out with one item, but following a DIE reference |
7540 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7541 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7542 | { | |
cc12ce38 DE |
7543 | if ((dwarf2_per_objfile->using_index |
7544 | ? !item->per_cu->v.quick->compunit_symtab | |
7545 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
7546 | /* Skip dummy CUs. */ | |
7547 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
7548 | { |
7549 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7550 | unsigned int debug_print_threshold; |
247f5c4f | 7551 | char buf[100]; |
f4dc4d17 | 7552 | |
247f5c4f | 7553 | if (per_cu->is_debug_types) |
f4dc4d17 | 7554 | { |
247f5c4f DE |
7555 | struct signatured_type *sig_type = |
7556 | (struct signatured_type *) per_cu; | |
7557 | ||
7558 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 DE |
7559 | hex_string (sig_type->signature), |
7560 | per_cu->offset.sect_off); | |
7561 | /* There can be 100s of TUs. | |
7562 | Only print them in verbose mode. */ | |
7563 | debug_print_threshold = 2; | |
f4dc4d17 | 7564 | } |
247f5c4f | 7565 | else |
73be47f5 DE |
7566 | { |
7567 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7568 | debug_print_threshold = 1; | |
7569 | } | |
247f5c4f | 7570 | |
b4f54984 | 7571 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7572 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7573 | |
7574 | if (per_cu->is_debug_types) | |
7575 | process_full_type_unit (per_cu, item->pretend_language); | |
7576 | else | |
7577 | process_full_comp_unit (per_cu, item->pretend_language); | |
7578 | ||
b4f54984 | 7579 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7580 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7581 | } |
10b3939b DJ |
7582 | |
7583 | item->per_cu->queued = 0; | |
7584 | next_item = item->next; | |
7585 | xfree (item); | |
7586 | } | |
7587 | ||
7588 | dwarf2_queue_tail = NULL; | |
45cfd468 | 7589 | |
b4f54984 | 7590 | if (dwarf_read_debug) |
45cfd468 DE |
7591 | { |
7592 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7593 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7594 | } |
10b3939b DJ |
7595 | } |
7596 | ||
7597 | /* Free all allocated queue entries. This function only releases anything if | |
7598 | an error was thrown; if the queue was processed then it would have been | |
7599 | freed as we went along. */ | |
7600 | ||
7601 | static void | |
7602 | dwarf2_release_queue (void *dummy) | |
7603 | { | |
7604 | struct dwarf2_queue_item *item, *last; | |
7605 | ||
7606 | item = dwarf2_queue; | |
7607 | while (item) | |
7608 | { | |
7609 | /* Anything still marked queued is likely to be in an | |
7610 | inconsistent state, so discard it. */ | |
7611 | if (item->per_cu->queued) | |
7612 | { | |
7613 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7614 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7615 | item->per_cu->queued = 0; |
7616 | } | |
7617 | ||
7618 | last = item; | |
7619 | item = item->next; | |
7620 | xfree (last); | |
7621 | } | |
7622 | ||
7623 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7624 | } | |
7625 | ||
7626 | /* Read in full symbols for PST, and anything it depends on. */ | |
7627 | ||
c906108c | 7628 | static void |
fba45db2 | 7629 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7630 | { |
10b3939b | 7631 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7632 | int i; |
7633 | ||
95554aad TT |
7634 | if (pst->readin) |
7635 | return; | |
7636 | ||
aaa75496 | 7637 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7638 | if (!pst->dependencies[i]->readin |
7639 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7640 | { |
7641 | /* Inform about additional files that need to be read in. */ | |
7642 | if (info_verbose) | |
7643 | { | |
a3f17187 | 7644 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7645 | fputs_filtered (" ", gdb_stdout); |
7646 | wrap_here (""); | |
7647 | fputs_filtered ("and ", gdb_stdout); | |
7648 | wrap_here (""); | |
7649 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7650 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7651 | gdb_flush (gdb_stdout); |
7652 | } | |
7653 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7654 | } | |
7655 | ||
9a3c8263 | 7656 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
7657 | |
7658 | if (per_cu == NULL) | |
aaa75496 JB |
7659 | { |
7660 | /* It's an include file, no symbols to read for it. | |
7661 | Everything is in the parent symtab. */ | |
7662 | pst->readin = 1; | |
7663 | return; | |
7664 | } | |
c906108c | 7665 | |
a0f42c21 | 7666 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7667 | } |
7668 | ||
dee91e82 DE |
7669 | /* Trivial hash function for die_info: the hash value of a DIE |
7670 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7671 | |
dee91e82 DE |
7672 | static hashval_t |
7673 | die_hash (const void *item) | |
10b3939b | 7674 | { |
9a3c8263 | 7675 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 7676 | |
dee91e82 DE |
7677 | return die->offset.sect_off; |
7678 | } | |
63d06c5c | 7679 | |
dee91e82 DE |
7680 | /* Trivial comparison function for die_info structures: two DIEs |
7681 | are equal if they have the same offset. */ | |
98bfdba5 | 7682 | |
dee91e82 DE |
7683 | static int |
7684 | die_eq (const void *item_lhs, const void *item_rhs) | |
7685 | { | |
9a3c8263 SM |
7686 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
7687 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 7688 | |
dee91e82 DE |
7689 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7690 | } | |
c906108c | 7691 | |
dee91e82 DE |
7692 | /* die_reader_func for load_full_comp_unit. |
7693 | This is identical to read_signatured_type_reader, | |
7694 | but is kept separate for now. */ | |
c906108c | 7695 | |
dee91e82 DE |
7696 | static void |
7697 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7698 | const gdb_byte *info_ptr, |
dee91e82 DE |
7699 | struct die_info *comp_unit_die, |
7700 | int has_children, | |
7701 | void *data) | |
7702 | { | |
7703 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 7704 | enum language *language_ptr = (enum language *) data; |
6caca83c | 7705 | |
dee91e82 DE |
7706 | gdb_assert (cu->die_hash == NULL); |
7707 | cu->die_hash = | |
7708 | htab_create_alloc_ex (cu->header.length / 12, | |
7709 | die_hash, | |
7710 | die_eq, | |
7711 | NULL, | |
7712 | &cu->comp_unit_obstack, | |
7713 | hashtab_obstack_allocate, | |
7714 | dummy_obstack_deallocate); | |
e142c38c | 7715 | |
dee91e82 DE |
7716 | if (has_children) |
7717 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7718 | &info_ptr, comp_unit_die); | |
7719 | cu->dies = comp_unit_die; | |
7720 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7721 | |
7722 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7723 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7724 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7725 | or we won't be able to build types correctly. |
7726 | Similarly, if we do not read the producer, we can not apply | |
7727 | producer-specific interpretation. */ | |
95554aad | 7728 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7729 | } |
10b3939b | 7730 | |
dee91e82 | 7731 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7732 | |
dee91e82 | 7733 | static void |
95554aad TT |
7734 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7735 | enum language pretend_language) | |
dee91e82 | 7736 | { |
3019eac3 | 7737 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7738 | |
f4dc4d17 DE |
7739 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7740 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7741 | } |
7742 | ||
3da10d80 KS |
7743 | /* Add a DIE to the delayed physname list. */ |
7744 | ||
7745 | static void | |
7746 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7747 | const char *name, struct die_info *die, | |
7748 | struct dwarf2_cu *cu) | |
7749 | { | |
7750 | struct delayed_method_info mi; | |
7751 | mi.type = type; | |
7752 | mi.fnfield_index = fnfield_index; | |
7753 | mi.index = index; | |
7754 | mi.name = name; | |
7755 | mi.die = die; | |
7756 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7757 | } | |
7758 | ||
7759 | /* A cleanup for freeing the delayed method list. */ | |
7760 | ||
7761 | static void | |
7762 | free_delayed_list (void *ptr) | |
7763 | { | |
7764 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7765 | if (cu->method_list != NULL) | |
7766 | { | |
7767 | VEC_free (delayed_method_info, cu->method_list); | |
7768 | cu->method_list = NULL; | |
7769 | } | |
7770 | } | |
7771 | ||
7772 | /* Compute the physnames of any methods on the CU's method list. | |
7773 | ||
7774 | The computation of method physnames is delayed in order to avoid the | |
7775 | (bad) condition that one of the method's formal parameters is of an as yet | |
7776 | incomplete type. */ | |
7777 | ||
7778 | static void | |
7779 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7780 | { | |
7781 | int i; | |
7782 | struct delayed_method_info *mi; | |
7783 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7784 | { | |
1d06ead6 | 7785 | const char *physname; |
3da10d80 KS |
7786 | struct fn_fieldlist *fn_flp |
7787 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7788 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
7789 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
7790 | = physname ? physname : ""; | |
3da10d80 KS |
7791 | } |
7792 | } | |
7793 | ||
a766d390 DE |
7794 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7795 | and it's not clear if/how imported objects will appear. | |
7796 | To keep Go support simple until that's worked out, | |
7797 | go back through what we've read and create something usable. | |
7798 | We could do this while processing each DIE, and feels kinda cleaner, | |
7799 | but that way is more invasive. | |
7800 | This is to, for example, allow the user to type "p var" or "b main" | |
7801 | without having to specify the package name, and allow lookups | |
7802 | of module.object to work in contexts that use the expression | |
7803 | parser. */ | |
7804 | ||
7805 | static void | |
7806 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7807 | { | |
7808 | char *package_name = NULL; | |
7809 | struct pending *list; | |
7810 | int i; | |
7811 | ||
7812 | for (list = global_symbols; list != NULL; list = list->next) | |
7813 | { | |
7814 | for (i = 0; i < list->nsyms; ++i) | |
7815 | { | |
7816 | struct symbol *sym = list->symbol[i]; | |
7817 | ||
7818 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7819 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7820 | { | |
7821 | char *this_package_name = go_symbol_package_name (sym); | |
7822 | ||
7823 | if (this_package_name == NULL) | |
7824 | continue; | |
7825 | if (package_name == NULL) | |
7826 | package_name = this_package_name; | |
7827 | else | |
7828 | { | |
7829 | if (strcmp (package_name, this_package_name) != 0) | |
7830 | complaint (&symfile_complaints, | |
7831 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
7832 | (symbol_symtab (sym) != NULL |
7833 | ? symtab_to_filename_for_display | |
7834 | (symbol_symtab (sym)) | |
4262abfb | 7835 | : objfile_name (cu->objfile)), |
a766d390 DE |
7836 | this_package_name, package_name); |
7837 | xfree (this_package_name); | |
7838 | } | |
7839 | } | |
7840 | } | |
7841 | } | |
7842 | ||
7843 | if (package_name != NULL) | |
7844 | { | |
7845 | struct objfile *objfile = cu->objfile; | |
34a68019 | 7846 | const char *saved_package_name |
224c3ddb SM |
7847 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
7848 | package_name, | |
7849 | strlen (package_name)); | |
a766d390 | 7850 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 7851 | saved_package_name, objfile); |
a766d390 DE |
7852 | struct symbol *sym; |
7853 | ||
7854 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7855 | ||
e623cf5d | 7856 | sym = allocate_symbol (objfile); |
f85f34ed | 7857 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7858 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7859 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7860 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7861 | e.g., "main" finds the "main" module and not C's main(). */ | |
7862 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7863 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7864 | SYMBOL_TYPE (sym) = type; |
7865 | ||
7866 | add_symbol_to_list (sym, &global_symbols); | |
7867 | ||
7868 | xfree (package_name); | |
7869 | } | |
7870 | } | |
7871 | ||
95554aad TT |
7872 | /* Return the symtab for PER_CU. This works properly regardless of |
7873 | whether we're using the index or psymtabs. */ | |
7874 | ||
43f3e411 DE |
7875 | static struct compunit_symtab * |
7876 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
7877 | { |
7878 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
7879 | ? per_cu->v.quick->compunit_symtab |
7880 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
7881 | } |
7882 | ||
7883 | /* A helper function for computing the list of all symbol tables | |
7884 | included by PER_CU. */ | |
7885 | ||
7886 | static void | |
43f3e411 | 7887 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 7888 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 7889 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 7890 | struct compunit_symtab *immediate_parent) |
95554aad TT |
7891 | { |
7892 | void **slot; | |
7893 | int ix; | |
43f3e411 | 7894 | struct compunit_symtab *cust; |
95554aad TT |
7895 | struct dwarf2_per_cu_data *iter; |
7896 | ||
7897 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7898 | if (*slot != NULL) | |
7899 | { | |
7900 | /* This inclusion and its children have been processed. */ | |
7901 | return; | |
7902 | } | |
7903 | ||
7904 | *slot = per_cu; | |
7905 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
7906 | cust = get_compunit_symtab (per_cu); |
7907 | if (cust != NULL) | |
ec94af83 DE |
7908 | { |
7909 | /* If this is a type unit only add its symbol table if we haven't | |
7910 | seen it yet (type unit per_cu's can share symtabs). */ | |
7911 | if (per_cu->is_debug_types) | |
7912 | { | |
43f3e411 | 7913 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
7914 | if (*slot == NULL) |
7915 | { | |
43f3e411 DE |
7916 | *slot = cust; |
7917 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
7918 | if (cust->user == NULL) | |
7919 | cust->user = immediate_parent; | |
ec94af83 DE |
7920 | } |
7921 | } | |
7922 | else | |
f9125b6c | 7923 | { |
43f3e411 DE |
7924 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
7925 | if (cust->user == NULL) | |
7926 | cust->user = immediate_parent; | |
f9125b6c | 7927 | } |
ec94af83 | 7928 | } |
95554aad TT |
7929 | |
7930 | for (ix = 0; | |
796a7ff8 | 7931 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7932 | ++ix) |
ec94af83 DE |
7933 | { |
7934 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 7935 | all_type_symtabs, iter, cust); |
ec94af83 | 7936 | } |
95554aad TT |
7937 | } |
7938 | ||
43f3e411 | 7939 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
7940 | PER_CU. */ |
7941 | ||
7942 | static void | |
43f3e411 | 7943 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 7944 | { |
f4dc4d17 DE |
7945 | gdb_assert (! per_cu->is_debug_types); |
7946 | ||
796a7ff8 | 7947 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7948 | { |
7949 | int ix, len; | |
ec94af83 | 7950 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
7951 | struct compunit_symtab *compunit_symtab_iter; |
7952 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 7953 | htab_t all_children, all_type_symtabs; |
43f3e411 | 7954 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
7955 | |
7956 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 7957 | if (cust == NULL) |
95554aad TT |
7958 | return; |
7959 | ||
7960 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7961 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7962 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7963 | NULL, xcalloc, xfree); | |
95554aad TT |
7964 | |
7965 | for (ix = 0; | |
796a7ff8 | 7966 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7967 | ix, per_cu_iter); |
95554aad | 7968 | ++ix) |
ec94af83 DE |
7969 | { |
7970 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 7971 | all_type_symtabs, per_cu_iter, |
43f3e411 | 7972 | cust); |
ec94af83 | 7973 | } |
95554aad | 7974 | |
ec94af83 | 7975 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
7976 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
7977 | cust->includes | |
8d749320 SM |
7978 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
7979 | struct compunit_symtab *, len + 1); | |
95554aad | 7980 | for (ix = 0; |
43f3e411 DE |
7981 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
7982 | compunit_symtab_iter); | |
95554aad | 7983 | ++ix) |
43f3e411 DE |
7984 | cust->includes[ix] = compunit_symtab_iter; |
7985 | cust->includes[len] = NULL; | |
95554aad | 7986 | |
43f3e411 | 7987 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 7988 | htab_delete (all_children); |
ec94af83 | 7989 | htab_delete (all_type_symtabs); |
95554aad TT |
7990 | } |
7991 | } | |
7992 | ||
7993 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7994 | read. */ | |
7995 | ||
7996 | static void | |
7997 | process_cu_includes (void) | |
7998 | { | |
7999 | int ix; | |
8000 | struct dwarf2_per_cu_data *iter; | |
8001 | ||
8002 | for (ix = 0; | |
8003 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8004 | ix, iter); | |
8005 | ++ix) | |
f4dc4d17 DE |
8006 | { |
8007 | if (! iter->is_debug_types) | |
43f3e411 | 8008 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8009 | } |
95554aad TT |
8010 | |
8011 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8012 | } | |
8013 | ||
9cdd5dbd | 8014 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8015 | already been loaded into memory. */ |
8016 | ||
8017 | static void | |
95554aad TT |
8018 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8019 | enum language pretend_language) | |
10b3939b | 8020 | { |
10b3939b | 8021 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8022 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8023 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8024 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8025 | struct compunit_symtab *cust; |
3da10d80 | 8026 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 8027 | CORE_ADDR baseaddr; |
4359dff1 | 8028 | struct block *static_block; |
3e29f34a | 8029 | CORE_ADDR addr; |
10b3939b DJ |
8030 | |
8031 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8032 | ||
10b3939b DJ |
8033 | buildsym_init (); |
8034 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 8035 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8036 | |
8037 | cu->list_in_scope = &file_symbols; | |
c906108c | 8038 | |
95554aad TT |
8039 | cu->language = pretend_language; |
8040 | cu->language_defn = language_def (cu->language); | |
8041 | ||
c906108c | 8042 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8043 | process_die (cu->dies, cu); |
c906108c | 8044 | |
a766d390 DE |
8045 | /* For now fudge the Go package. */ |
8046 | if (cu->language == language_go) | |
8047 | fixup_go_packaging (cu); | |
8048 | ||
3da10d80 KS |
8049 | /* Now that we have processed all the DIEs in the CU, all the types |
8050 | should be complete, and it should now be safe to compute all of the | |
8051 | physnames. */ | |
8052 | compute_delayed_physnames (cu); | |
8053 | do_cleanups (delayed_list_cleanup); | |
8054 | ||
fae299cd DC |
8055 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8056 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8057 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8058 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8059 | |
3e29f34a MR |
8060 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8061 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8062 | |
8063 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8064 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8065 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8066 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8067 | this comp unit. */ | |
8068 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8069 | ||
43f3e411 DE |
8070 | cust = end_symtab_from_static_block (static_block, |
8071 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8072 | |
43f3e411 | 8073 | if (cust != NULL) |
c906108c | 8074 | { |
df15bd07 | 8075 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8076 | |
8be455d7 JK |
8077 | /* Set symtab language to language from DW_AT_language. If the |
8078 | compilation is from a C file generated by language preprocessors, do | |
8079 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8080 | if (!(cu->language == language_c |
40e3ad0e | 8081 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8082 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8083 | |
8084 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8085 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8086 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8087 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8088 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8089 | |
8090 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8091 | needed, it would be wrong due to missing DW_AT_producer there. | |
8092 | ||
8093 | Still one can confuse GDB by using non-standard GCC compilation | |
8094 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8095 | */ | |
ab260dad | 8096 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8097 | cust->locations_valid = 1; |
e0d00bc7 JK |
8098 | |
8099 | if (gcc_4_minor >= 5) | |
43f3e411 | 8100 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8101 | |
43f3e411 | 8102 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8103 | } |
9291a0cd TT |
8104 | |
8105 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8106 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8107 | else |
8108 | { | |
8109 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8110 | pst->compunit_symtab = cust; |
9291a0cd TT |
8111 | pst->readin = 1; |
8112 | } | |
c906108c | 8113 | |
95554aad TT |
8114 | /* Push it for inclusion processing later. */ |
8115 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
8116 | ||
c906108c | 8117 | do_cleanups (back_to); |
f4dc4d17 | 8118 | } |
45cfd468 | 8119 | |
f4dc4d17 DE |
8120 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8121 | already been loaded into memory. */ | |
8122 | ||
8123 | static void | |
8124 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8125 | enum language pretend_language) | |
8126 | { | |
8127 | struct dwarf2_cu *cu = per_cu->cu; | |
8128 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 8129 | struct compunit_symtab *cust; |
f4dc4d17 | 8130 | struct cleanup *back_to, *delayed_list_cleanup; |
0186c6a7 DE |
8131 | struct signatured_type *sig_type; |
8132 | ||
8133 | gdb_assert (per_cu->is_debug_types); | |
8134 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8135 | |
8136 | buildsym_init (); | |
8137 | back_to = make_cleanup (really_free_pendings, NULL); | |
8138 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
8139 | ||
8140 | cu->list_in_scope = &file_symbols; | |
8141 | ||
8142 | cu->language = pretend_language; | |
8143 | cu->language_defn = language_def (cu->language); | |
8144 | ||
8145 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8146 | process_die (cu->dies, cu); | |
8147 | ||
8148 | /* For now fudge the Go package. */ | |
8149 | if (cu->language == language_go) | |
8150 | fixup_go_packaging (cu); | |
8151 | ||
8152 | /* Now that we have processed all the DIEs in the CU, all the types | |
8153 | should be complete, and it should now be safe to compute all of the | |
8154 | physnames. */ | |
8155 | compute_delayed_physnames (cu); | |
8156 | do_cleanups (delayed_list_cleanup); | |
8157 | ||
8158 | /* TUs share symbol tables. | |
8159 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8160 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8161 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 8162 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 8163 | { |
43f3e411 DE |
8164 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
8165 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 8166 | |
43f3e411 | 8167 | if (cust != NULL) |
f4dc4d17 DE |
8168 | { |
8169 | /* Set symtab language to language from DW_AT_language. If the | |
8170 | compilation is from a C file generated by language preprocessors, | |
8171 | do not set the language if it was already deduced by | |
8172 | start_subfile. */ | |
43f3e411 DE |
8173 | if (!(cu->language == language_c |
8174 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
8175 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
8176 | } |
8177 | } | |
8178 | else | |
8179 | { | |
0ab9ce85 | 8180 | augment_type_symtab (); |
43f3e411 | 8181 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
8182 | } |
8183 | ||
8184 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8185 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
8186 | else |
8187 | { | |
8188 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8189 | pst->compunit_symtab = cust; |
f4dc4d17 | 8190 | pst->readin = 1; |
45cfd468 | 8191 | } |
f4dc4d17 DE |
8192 | |
8193 | do_cleanups (back_to); | |
c906108c SS |
8194 | } |
8195 | ||
95554aad TT |
8196 | /* Process an imported unit DIE. */ |
8197 | ||
8198 | static void | |
8199 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8200 | { | |
8201 | struct attribute *attr; | |
8202 | ||
f4dc4d17 DE |
8203 | /* For now we don't handle imported units in type units. */ |
8204 | if (cu->per_cu->is_debug_types) | |
8205 | { | |
8206 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8207 | " supported in type units [in module %s]"), | |
4262abfb | 8208 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8209 | } |
8210 | ||
95554aad TT |
8211 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8212 | if (attr != NULL) | |
8213 | { | |
8214 | struct dwarf2_per_cu_data *per_cu; | |
8215 | struct symtab *imported_symtab; | |
8216 | sect_offset offset; | |
36586728 | 8217 | int is_dwz; |
95554aad TT |
8218 | |
8219 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
8220 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
8221 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 8222 | |
69d751e3 | 8223 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8224 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8225 | load_full_comp_unit (per_cu, cu->language); | |
8226 | ||
796a7ff8 | 8227 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8228 | per_cu); |
8229 | } | |
8230 | } | |
8231 | ||
adde2bff DE |
8232 | /* Reset the in_process bit of a die. */ |
8233 | ||
8234 | static void | |
8235 | reset_die_in_process (void *arg) | |
8236 | { | |
9a3c8263 | 8237 | struct die_info *die = (struct die_info *) arg; |
8c3cb9fa | 8238 | |
adde2bff DE |
8239 | die->in_process = 0; |
8240 | } | |
8241 | ||
c906108c SS |
8242 | /* Process a die and its children. */ |
8243 | ||
8244 | static void | |
e7c27a73 | 8245 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8246 | { |
adde2bff DE |
8247 | struct cleanup *in_process; |
8248 | ||
8249 | /* We should only be processing those not already in process. */ | |
8250 | gdb_assert (!die->in_process); | |
8251 | ||
8252 | die->in_process = 1; | |
8253 | in_process = make_cleanup (reset_die_in_process,die); | |
8254 | ||
c906108c SS |
8255 | switch (die->tag) |
8256 | { | |
8257 | case DW_TAG_padding: | |
8258 | break; | |
8259 | case DW_TAG_compile_unit: | |
95554aad | 8260 | case DW_TAG_partial_unit: |
e7c27a73 | 8261 | read_file_scope (die, cu); |
c906108c | 8262 | break; |
348e048f DE |
8263 | case DW_TAG_type_unit: |
8264 | read_type_unit_scope (die, cu); | |
8265 | break; | |
c906108c | 8266 | case DW_TAG_subprogram: |
c906108c | 8267 | case DW_TAG_inlined_subroutine: |
edb3359d | 8268 | read_func_scope (die, cu); |
c906108c SS |
8269 | break; |
8270 | case DW_TAG_lexical_block: | |
14898363 L |
8271 | case DW_TAG_try_block: |
8272 | case DW_TAG_catch_block: | |
e7c27a73 | 8273 | read_lexical_block_scope (die, cu); |
c906108c | 8274 | break; |
96408a79 SA |
8275 | case DW_TAG_GNU_call_site: |
8276 | read_call_site_scope (die, cu); | |
8277 | break; | |
c906108c | 8278 | case DW_TAG_class_type: |
680b30c7 | 8279 | case DW_TAG_interface_type: |
c906108c SS |
8280 | case DW_TAG_structure_type: |
8281 | case DW_TAG_union_type: | |
134d01f1 | 8282 | process_structure_scope (die, cu); |
c906108c SS |
8283 | break; |
8284 | case DW_TAG_enumeration_type: | |
134d01f1 | 8285 | process_enumeration_scope (die, cu); |
c906108c | 8286 | break; |
134d01f1 | 8287 | |
f792889a DJ |
8288 | /* These dies have a type, but processing them does not create |
8289 | a symbol or recurse to process the children. Therefore we can | |
8290 | read them on-demand through read_type_die. */ | |
c906108c | 8291 | case DW_TAG_subroutine_type: |
72019c9c | 8292 | case DW_TAG_set_type: |
c906108c | 8293 | case DW_TAG_array_type: |
c906108c | 8294 | case DW_TAG_pointer_type: |
c906108c | 8295 | case DW_TAG_ptr_to_member_type: |
c906108c | 8296 | case DW_TAG_reference_type: |
c906108c | 8297 | case DW_TAG_string_type: |
c906108c | 8298 | break; |
134d01f1 | 8299 | |
c906108c | 8300 | case DW_TAG_base_type: |
a02abb62 | 8301 | case DW_TAG_subrange_type: |
cb249c71 | 8302 | case DW_TAG_typedef: |
134d01f1 DJ |
8303 | /* Add a typedef symbol for the type definition, if it has a |
8304 | DW_AT_name. */ | |
f792889a | 8305 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8306 | break; |
c906108c | 8307 | case DW_TAG_common_block: |
e7c27a73 | 8308 | read_common_block (die, cu); |
c906108c SS |
8309 | break; |
8310 | case DW_TAG_common_inclusion: | |
8311 | break; | |
d9fa45fe | 8312 | case DW_TAG_namespace: |
4d4ec4e5 | 8313 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8314 | read_namespace (die, cu); |
d9fa45fe | 8315 | break; |
5d7cb8df | 8316 | case DW_TAG_module: |
4d4ec4e5 | 8317 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8318 | read_module (die, cu); |
8319 | break; | |
d9fa45fe | 8320 | case DW_TAG_imported_declaration: |
74921315 KS |
8321 | cu->processing_has_namespace_info = 1; |
8322 | if (read_namespace_alias (die, cu)) | |
8323 | break; | |
8324 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8325 | case DW_TAG_imported_module: |
4d4ec4e5 | 8326 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8327 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8328 | || cu->language != language_fortran)) | |
8329 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8330 | dwarf_tag_name (die->tag)); | |
8331 | read_import_statement (die, cu); | |
d9fa45fe | 8332 | break; |
95554aad TT |
8333 | |
8334 | case DW_TAG_imported_unit: | |
8335 | process_imported_unit_die (die, cu); | |
8336 | break; | |
8337 | ||
c906108c | 8338 | default: |
e7c27a73 | 8339 | new_symbol (die, NULL, cu); |
c906108c SS |
8340 | break; |
8341 | } | |
adde2bff DE |
8342 | |
8343 | do_cleanups (in_process); | |
c906108c | 8344 | } |
ca69b9e6 DE |
8345 | \f |
8346 | /* DWARF name computation. */ | |
c906108c | 8347 | |
94af9270 KS |
8348 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8349 | needs to have the name of the scope prepended to the name listed in the | |
8350 | die. */ | |
8351 | ||
8352 | static int | |
8353 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8354 | { | |
1c809c68 TT |
8355 | struct attribute *attr; |
8356 | ||
94af9270 KS |
8357 | switch (die->tag) |
8358 | { | |
8359 | case DW_TAG_namespace: | |
8360 | case DW_TAG_typedef: | |
8361 | case DW_TAG_class_type: | |
8362 | case DW_TAG_interface_type: | |
8363 | case DW_TAG_structure_type: | |
8364 | case DW_TAG_union_type: | |
8365 | case DW_TAG_enumeration_type: | |
8366 | case DW_TAG_enumerator: | |
8367 | case DW_TAG_subprogram: | |
08a76f8a | 8368 | case DW_TAG_inlined_subroutine: |
94af9270 | 8369 | case DW_TAG_member: |
74921315 | 8370 | case DW_TAG_imported_declaration: |
94af9270 KS |
8371 | return 1; |
8372 | ||
8373 | case DW_TAG_variable: | |
c2b0a229 | 8374 | case DW_TAG_constant: |
94af9270 KS |
8375 | /* We only need to prefix "globally" visible variables. These include |
8376 | any variable marked with DW_AT_external or any variable that | |
8377 | lives in a namespace. [Variables in anonymous namespaces | |
8378 | require prefixing, but they are not DW_AT_external.] */ | |
8379 | ||
8380 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8381 | { | |
8382 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8383 | |
94af9270 KS |
8384 | return die_needs_namespace (die_specification (die, &spec_cu), |
8385 | spec_cu); | |
8386 | } | |
8387 | ||
1c809c68 | 8388 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8389 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8390 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8391 | return 0; |
8392 | /* A variable in a lexical block of some kind does not need a | |
8393 | namespace, even though in C++ such variables may be external | |
8394 | and have a mangled name. */ | |
8395 | if (die->parent->tag == DW_TAG_lexical_block | |
8396 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8397 | || die->parent->tag == DW_TAG_catch_block |
8398 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8399 | return 0; |
8400 | return 1; | |
94af9270 KS |
8401 | |
8402 | default: | |
8403 | return 0; | |
8404 | } | |
8405 | } | |
8406 | ||
98bfdba5 PA |
8407 | /* Retrieve the last character from a mem_file. */ |
8408 | ||
8409 | static void | |
8410 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
8411 | { | |
8412 | char *last_char_p = (char *) object; | |
8413 | ||
8414 | if (length > 0) | |
8415 | *last_char_p = buffer[length - 1]; | |
8416 | } | |
8417 | ||
94af9270 | 8418 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
8419 | compute the physname for the object, which include a method's: |
8420 | - formal parameters (C++/Java), | |
8421 | - receiver type (Go), | |
8422 | - return type (Java). | |
8423 | ||
8424 | The term "physname" is a bit confusing. | |
8425 | For C++, for example, it is the demangled name. | |
8426 | For Go, for example, it's the mangled name. | |
94af9270 | 8427 | |
af6b7be1 JB |
8428 | For Ada, return the DIE's linkage name rather than the fully qualified |
8429 | name. PHYSNAME is ignored.. | |
8430 | ||
94af9270 KS |
8431 | The result is allocated on the objfile_obstack and canonicalized. */ |
8432 | ||
8433 | static const char * | |
15d034d0 TT |
8434 | dwarf2_compute_name (const char *name, |
8435 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8436 | int physname) |
8437 | { | |
bb5ed363 DE |
8438 | struct objfile *objfile = cu->objfile; |
8439 | ||
94af9270 KS |
8440 | if (name == NULL) |
8441 | name = dwarf2_name (die, cu); | |
8442 | ||
2ee7123e DE |
8443 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
8444 | but otherwise compute it by typename_concat inside GDB. | |
8445 | FIXME: Actually this is not really true, or at least not always true. | |
8446 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
8447 | Fortran names because there is no mangling standard. So new_symbol_full | |
8448 | will set the demangled name to the result of dwarf2_full_name, and it is | |
8449 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
8450 | if (cu->language == language_ada |
8451 | || (cu->language == language_fortran && physname)) | |
8452 | { | |
8453 | /* For Ada unit, we prefer the linkage name over the name, as | |
8454 | the former contains the exported name, which the user expects | |
8455 | to be able to reference. Ideally, we want the user to be able | |
8456 | to reference this entity using either natural or linkage name, | |
8457 | but we haven't started looking at this enhancement yet. */ | |
2ee7123e | 8458 | const char *linkage_name; |
f55ee35c | 8459 | |
2ee7123e DE |
8460 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
8461 | if (linkage_name == NULL) | |
8462 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8463 | if (linkage_name != NULL) | |
8464 | return linkage_name; | |
f55ee35c JK |
8465 | } |
8466 | ||
94af9270 KS |
8467 | /* These are the only languages we know how to qualify names in. */ |
8468 | if (name != NULL | |
f55ee35c | 8469 | && (cu->language == language_cplus || cu->language == language_java |
45280282 | 8470 | || cu->language == language_fortran || cu->language == language_d)) |
94af9270 KS |
8471 | { |
8472 | if (die_needs_namespace (die, cu)) | |
8473 | { | |
8474 | long length; | |
0d5cff50 | 8475 | const char *prefix; |
94af9270 | 8476 | struct ui_file *buf; |
34a68019 TT |
8477 | char *intermediate_name; |
8478 | const char *canonical_name = NULL; | |
94af9270 KS |
8479 | |
8480 | prefix = determine_prefix (die, cu); | |
8481 | buf = mem_fileopen (); | |
8482 | if (*prefix != '\0') | |
8483 | { | |
f55ee35c JK |
8484 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8485 | physname, cu); | |
9a619af0 | 8486 | |
94af9270 KS |
8487 | fputs_unfiltered (prefixed_name, buf); |
8488 | xfree (prefixed_name); | |
8489 | } | |
8490 | else | |
62d5b8da | 8491 | fputs_unfiltered (name, buf); |
94af9270 | 8492 | |
98bfdba5 PA |
8493 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8494 | as children with DW_TAG_template_type_param or | |
8495 | DW_TAG_value_type_param. If the latter, add them to the name | |
8496 | here. If the name already has template parameters, then | |
8497 | skip this step; some versions of GCC emit both, and | |
8498 | it is more efficient to use the pre-computed name. | |
8499 | ||
8500 | Something to keep in mind about this process: it is very | |
8501 | unlikely, or in some cases downright impossible, to produce | |
8502 | something that will match the mangled name of a function. | |
8503 | If the definition of the function has the same debug info, | |
8504 | we should be able to match up with it anyway. But fallbacks | |
8505 | using the minimal symbol, for instance to find a method | |
8506 | implemented in a stripped copy of libstdc++, will not work. | |
8507 | If we do not have debug info for the definition, we will have to | |
8508 | match them up some other way. | |
8509 | ||
8510 | When we do name matching there is a related problem with function | |
8511 | templates; two instantiated function templates are allowed to | |
8512 | differ only by their return types, which we do not add here. */ | |
8513 | ||
8514 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8515 | { | |
8516 | struct attribute *attr; | |
8517 | struct die_info *child; | |
8518 | int first = 1; | |
8519 | ||
8520 | die->building_fullname = 1; | |
8521 | ||
8522 | for (child = die->child; child != NULL; child = child->sibling) | |
8523 | { | |
8524 | struct type *type; | |
12df843f | 8525 | LONGEST value; |
d521ce57 | 8526 | const gdb_byte *bytes; |
98bfdba5 PA |
8527 | struct dwarf2_locexpr_baton *baton; |
8528 | struct value *v; | |
8529 | ||
8530 | if (child->tag != DW_TAG_template_type_param | |
8531 | && child->tag != DW_TAG_template_value_param) | |
8532 | continue; | |
8533 | ||
8534 | if (first) | |
8535 | { | |
8536 | fputs_unfiltered ("<", buf); | |
8537 | first = 0; | |
8538 | } | |
8539 | else | |
8540 | fputs_unfiltered (", ", buf); | |
8541 | ||
8542 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8543 | if (attr == NULL) | |
8544 | { | |
8545 | complaint (&symfile_complaints, | |
8546 | _("template parameter missing DW_AT_type")); | |
8547 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8548 | continue; | |
8549 | } | |
8550 | type = die_type (child, cu); | |
8551 | ||
8552 | if (child->tag == DW_TAG_template_type_param) | |
8553 | { | |
79d43c61 | 8554 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8555 | continue; |
8556 | } | |
8557 | ||
8558 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8559 | if (attr == NULL) | |
8560 | { | |
8561 | complaint (&symfile_complaints, | |
3e43a32a MS |
8562 | _("template parameter missing " |
8563 | "DW_AT_const_value")); | |
98bfdba5 PA |
8564 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8565 | continue; | |
8566 | } | |
8567 | ||
8568 | dwarf2_const_value_attr (attr, type, name, | |
8569 | &cu->comp_unit_obstack, cu, | |
8570 | &value, &bytes, &baton); | |
8571 | ||
8572 | if (TYPE_NOSIGN (type)) | |
8573 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8574 | changed, this can use value_print instead. */ | |
8575 | c_printchar (value, type, buf); | |
8576 | else | |
8577 | { | |
8578 | struct value_print_options opts; | |
8579 | ||
8580 | if (baton != NULL) | |
8581 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8582 | baton->data, | |
8583 | baton->size, | |
8584 | baton->per_cu); | |
8585 | else if (bytes != NULL) | |
8586 | { | |
8587 | v = allocate_value (type); | |
8588 | memcpy (value_contents_writeable (v), bytes, | |
8589 | TYPE_LENGTH (type)); | |
8590 | } | |
8591 | else | |
8592 | v = value_from_longest (type, value); | |
8593 | ||
3e43a32a MS |
8594 | /* Specify decimal so that we do not depend on |
8595 | the radix. */ | |
98bfdba5 PA |
8596 | get_formatted_print_options (&opts, 'd'); |
8597 | opts.raw = 1; | |
8598 | value_print (v, buf, &opts); | |
8599 | release_value (v); | |
8600 | value_free (v); | |
8601 | } | |
8602 | } | |
8603 | ||
8604 | die->building_fullname = 0; | |
8605 | ||
8606 | if (!first) | |
8607 | { | |
8608 | /* Close the argument list, with a space if necessary | |
8609 | (nested templates). */ | |
8610 | char last_char = '\0'; | |
8611 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8612 | if (last_char == '>') | |
8613 | fputs_unfiltered (" >", buf); | |
8614 | else | |
8615 | fputs_unfiltered (">", buf); | |
8616 | } | |
8617 | } | |
8618 | ||
94af9270 KS |
8619 | /* For Java and C++ methods, append formal parameter type |
8620 | information, if PHYSNAME. */ | |
6e70227d | 8621 | |
94af9270 KS |
8622 | if (physname && die->tag == DW_TAG_subprogram |
8623 | && (cu->language == language_cplus | |
8624 | || cu->language == language_java)) | |
8625 | { | |
8626 | struct type *type = read_type_die (die, cu); | |
8627 | ||
79d43c61 TT |
8628 | c_type_print_args (type, buf, 1, cu->language, |
8629 | &type_print_raw_options); | |
94af9270 KS |
8630 | |
8631 | if (cu->language == language_java) | |
8632 | { | |
8633 | /* For java, we must append the return type to method | |
0963b4bd | 8634 | names. */ |
94af9270 KS |
8635 | if (die->tag == DW_TAG_subprogram) |
8636 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 8637 | 0, 0, &type_print_raw_options); |
94af9270 KS |
8638 | } |
8639 | else if (cu->language == language_cplus) | |
8640 | { | |
60430eff DJ |
8641 | /* Assume that an artificial first parameter is |
8642 | "this", but do not crash if it is not. RealView | |
8643 | marks unnamed (and thus unused) parameters as | |
8644 | artificial; there is no way to differentiate | |
8645 | the two cases. */ | |
94af9270 KS |
8646 | if (TYPE_NFIELDS (type) > 0 |
8647 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8648 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8649 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8650 | 0)))) | |
94af9270 KS |
8651 | fputs_unfiltered (" const", buf); |
8652 | } | |
8653 | } | |
8654 | ||
34a68019 | 8655 | intermediate_name = ui_file_xstrdup (buf, &length); |
94af9270 KS |
8656 | ui_file_delete (buf); |
8657 | ||
8658 | if (cu->language == language_cplus) | |
34a68019 TT |
8659 | canonical_name |
8660 | = dwarf2_canonicalize_name (intermediate_name, cu, | |
8661 | &objfile->per_bfd->storage_obstack); | |
8662 | ||
8663 | /* If we only computed INTERMEDIATE_NAME, or if | |
8664 | INTERMEDIATE_NAME is already canonical, then we need to | |
8665 | copy it to the appropriate obstack. */ | |
8666 | if (canonical_name == NULL || canonical_name == intermediate_name) | |
224c3ddb SM |
8667 | name = ((const char *) |
8668 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
8669 | intermediate_name, | |
8670 | strlen (intermediate_name))); | |
34a68019 TT |
8671 | else |
8672 | name = canonical_name; | |
9a619af0 | 8673 | |
34a68019 | 8674 | xfree (intermediate_name); |
94af9270 KS |
8675 | } |
8676 | } | |
8677 | ||
8678 | return name; | |
8679 | } | |
8680 | ||
0114d602 DJ |
8681 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8682 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 8683 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
8684 | not have a name. NAME may either be from a previous call to |
8685 | dwarf2_name or NULL. | |
8686 | ||
0963b4bd | 8687 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
8688 | |
8689 | static const char * | |
15d034d0 | 8690 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8691 | { |
94af9270 KS |
8692 | return dwarf2_compute_name (name, die, cu, 0); |
8693 | } | |
0114d602 | 8694 | |
94af9270 KS |
8695 | /* Construct a physname for the given DIE in CU. NAME may either be |
8696 | from a previous call to dwarf2_name or NULL. The result will be | |
8697 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8698 | name. | |
0114d602 | 8699 | |
94af9270 | 8700 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 8701 | |
94af9270 | 8702 | static const char * |
15d034d0 | 8703 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8704 | { |
bb5ed363 | 8705 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8706 | struct attribute *attr; |
8707 | const char *retval, *mangled = NULL, *canon = NULL; | |
8708 | struct cleanup *back_to; | |
8709 | int need_copy = 1; | |
8710 | ||
8711 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8712 | on its own. */ | |
8713 | if (!die_needs_namespace (die, cu)) | |
8714 | return dwarf2_compute_name (name, die, cu, 1); | |
8715 | ||
8716 | back_to = make_cleanup (null_cleanup, NULL); | |
8717 | ||
7d45c7c3 KB |
8718 | mangled = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
8719 | if (mangled == NULL) | |
8720 | mangled = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
900e11f9 JK |
8721 | |
8722 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
8723 | has computed. */ | |
7d45c7c3 | 8724 | if (mangled != NULL) |
900e11f9 JK |
8725 | { |
8726 | char *demangled; | |
8727 | ||
900e11f9 JK |
8728 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
8729 | type. It is easier for GDB users to search for such functions as | |
8730 | `name(params)' than `long name(params)'. In such case the minimal | |
8731 | symbol names do not match the full symbol names but for template | |
8732 | functions there is never a need to look up their definition from their | |
8733 | declaration so the only disadvantage remains the minimal symbol | |
8734 | variant `long name(params)' does not have the proper inferior type. | |
8735 | */ | |
8736 | ||
a766d390 DE |
8737 | if (cu->language == language_go) |
8738 | { | |
8739 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8740 | new_symbol_full assumes we return the mangled name. | |
8741 | This just undoes that lie until things are cleaned up. */ | |
8742 | demangled = NULL; | |
8743 | } | |
8744 | else | |
8745 | { | |
8de20a37 TT |
8746 | demangled = gdb_demangle (mangled, |
8747 | (DMGL_PARAMS | DMGL_ANSI | |
8748 | | (cu->language == language_java | |
8749 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
8750 | : DMGL_RET_DROP))); | |
a766d390 | 8751 | } |
900e11f9 JK |
8752 | if (demangled) |
8753 | { | |
8754 | make_cleanup (xfree, demangled); | |
8755 | canon = demangled; | |
8756 | } | |
8757 | else | |
8758 | { | |
8759 | canon = mangled; | |
8760 | need_copy = 0; | |
8761 | } | |
8762 | } | |
8763 | ||
8764 | if (canon == NULL || check_physname) | |
8765 | { | |
8766 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8767 | ||
8768 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8769 | { | |
8770 | /* It may not mean a bug in GDB. The compiler could also | |
8771 | compute DW_AT_linkage_name incorrectly. But in such case | |
8772 | GDB would need to be bug-to-bug compatible. */ | |
8773 | ||
8774 | complaint (&symfile_complaints, | |
8775 | _("Computed physname <%s> does not match demangled <%s> " | |
8776 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8777 | physname, canon, mangled, die->offset.sect_off, |
8778 | objfile_name (objfile)); | |
900e11f9 JK |
8779 | |
8780 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8781 | is available here - over computed PHYSNAME. It is safer | |
8782 | against both buggy GDB and buggy compilers. */ | |
8783 | ||
8784 | retval = canon; | |
8785 | } | |
8786 | else | |
8787 | { | |
8788 | retval = physname; | |
8789 | need_copy = 0; | |
8790 | } | |
8791 | } | |
8792 | else | |
8793 | retval = canon; | |
8794 | ||
8795 | if (need_copy) | |
224c3ddb SM |
8796 | retval = ((const char *) |
8797 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
8798 | retval, strlen (retval))); | |
900e11f9 JK |
8799 | |
8800 | do_cleanups (back_to); | |
8801 | return retval; | |
0114d602 DJ |
8802 | } |
8803 | ||
74921315 KS |
8804 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
8805 | a new symbol for it. | |
8806 | ||
8807 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
8808 | ||
8809 | static int | |
8810 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
8811 | { | |
8812 | struct attribute *attr; | |
8813 | ||
8814 | /* If the die does not have a name, this is not a namespace | |
8815 | alias. */ | |
8816 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8817 | if (attr != NULL) | |
8818 | { | |
8819 | int num; | |
8820 | struct die_info *d = die; | |
8821 | struct dwarf2_cu *imported_cu = cu; | |
8822 | ||
8823 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
8824 | keep inspecting DIEs until we hit the underlying import. */ | |
8825 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
8826 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
8827 | { | |
8828 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
8829 | if (attr == NULL) | |
8830 | break; | |
8831 | ||
8832 | d = follow_die_ref (d, attr, &imported_cu); | |
8833 | if (d->tag != DW_TAG_imported_declaration) | |
8834 | break; | |
8835 | } | |
8836 | ||
8837 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
8838 | { | |
8839 | complaint (&symfile_complaints, | |
8840 | _("DIE at 0x%x has too many recursively imported " | |
8841 | "declarations"), d->offset.sect_off); | |
8842 | return 0; | |
8843 | } | |
8844 | ||
8845 | if (attr != NULL) | |
8846 | { | |
8847 | struct type *type; | |
8848 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
8849 | ||
8850 | type = get_die_type_at_offset (offset, cu->per_cu); | |
8851 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
8852 | { | |
8853 | /* This declaration is a global namespace alias. Add | |
8854 | a symbol for it whose type is the aliased namespace. */ | |
8855 | new_symbol (die, type, cu); | |
8856 | return 1; | |
8857 | } | |
8858 | } | |
8859 | } | |
8860 | ||
8861 | return 0; | |
8862 | } | |
8863 | ||
22cee43f PMR |
8864 | /* Return the using directives repository (global or local?) to use in the |
8865 | current context for LANGUAGE. | |
8866 | ||
8867 | For Ada, imported declarations can materialize renamings, which *may* be | |
8868 | global. However it is impossible (for now?) in DWARF to distinguish | |
8869 | "external" imported declarations and "static" ones. As all imported | |
8870 | declarations seem to be static in all other languages, make them all CU-wide | |
8871 | global only in Ada. */ | |
8872 | ||
8873 | static struct using_direct ** | |
8874 | using_directives (enum language language) | |
8875 | { | |
8876 | if (language == language_ada && context_stack_depth == 0) | |
8877 | return &global_using_directives; | |
8878 | else | |
8879 | return &local_using_directives; | |
8880 | } | |
8881 | ||
27aa8d6a SW |
8882 | /* Read the import statement specified by the given die and record it. */ |
8883 | ||
8884 | static void | |
8885 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8886 | { | |
bb5ed363 | 8887 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8888 | struct attribute *import_attr; |
32019081 | 8889 | struct die_info *imported_die, *child_die; |
de4affc9 | 8890 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8891 | const char *imported_name; |
794684b6 | 8892 | const char *imported_name_prefix; |
13387711 SW |
8893 | const char *canonical_name; |
8894 | const char *import_alias; | |
8895 | const char *imported_declaration = NULL; | |
794684b6 | 8896 | const char *import_prefix; |
32019081 JK |
8897 | VEC (const_char_ptr) *excludes = NULL; |
8898 | struct cleanup *cleanups; | |
13387711 | 8899 | |
27aa8d6a SW |
8900 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8901 | if (import_attr == NULL) | |
8902 | { | |
8903 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8904 | dwarf_tag_name (die->tag)); | |
8905 | return; | |
8906 | } | |
8907 | ||
de4affc9 CC |
8908 | imported_cu = cu; |
8909 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8910 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8911 | if (imported_name == NULL) |
8912 | { | |
8913 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8914 | ||
8915 | The import in the following code: | |
8916 | namespace A | |
8917 | { | |
8918 | typedef int B; | |
8919 | } | |
8920 | ||
8921 | int main () | |
8922 | { | |
8923 | using A::B; | |
8924 | B b; | |
8925 | return b; | |
8926 | } | |
8927 | ||
8928 | ... | |
8929 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8930 | <52> DW_AT_decl_file : 1 | |
8931 | <53> DW_AT_decl_line : 6 | |
8932 | <54> DW_AT_import : <0x75> | |
8933 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8934 | <59> DW_AT_name : B | |
8935 | <5b> DW_AT_decl_file : 1 | |
8936 | <5c> DW_AT_decl_line : 2 | |
8937 | <5d> DW_AT_type : <0x6e> | |
8938 | ... | |
8939 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8940 | <76> DW_AT_byte_size : 4 | |
8941 | <77> DW_AT_encoding : 5 (signed) | |
8942 | ||
8943 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8944 | This case will be ignored until the gcc bug is fixed. */ | |
8945 | return; | |
8946 | } | |
8947 | ||
82856980 SW |
8948 | /* Figure out the local name after import. */ |
8949 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8950 | |
794684b6 SW |
8951 | /* Figure out where the statement is being imported to. */ |
8952 | import_prefix = determine_prefix (die, cu); | |
8953 | ||
8954 | /* Figure out what the scope of the imported die is and prepend it | |
8955 | to the name of the imported die. */ | |
de4affc9 | 8956 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8957 | |
f55ee35c JK |
8958 | if (imported_die->tag != DW_TAG_namespace |
8959 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8960 | { |
13387711 SW |
8961 | imported_declaration = imported_name; |
8962 | canonical_name = imported_name_prefix; | |
794684b6 | 8963 | } |
13387711 | 8964 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 8965 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
8966 | imported_name_prefix, |
8967 | (cu->language == language_d ? "." : "::"), | |
8968 | imported_name, (char *) NULL); | |
13387711 SW |
8969 | else |
8970 | canonical_name = imported_name; | |
794684b6 | 8971 | |
32019081 JK |
8972 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8973 | ||
8974 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8975 | for (child_die = die->child; child_die && child_die->tag; | |
8976 | child_die = sibling_die (child_die)) | |
8977 | { | |
8978 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8979 | represented by an imported module entry with an import attribute | |
8980 | referring to the module and owned entries corresponding to those | |
8981 | entities that are renamed as part of being imported. */ | |
8982 | ||
8983 | if (child_die->tag != DW_TAG_imported_declaration) | |
8984 | { | |
8985 | complaint (&symfile_complaints, | |
8986 | _("child DW_TAG_imported_declaration expected " | |
8987 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 8988 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8989 | continue; |
8990 | } | |
8991 | ||
8992 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
8993 | if (import_attr == NULL) | |
8994 | { | |
8995 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8996 | dwarf_tag_name (child_die->tag)); | |
8997 | continue; | |
8998 | } | |
8999 | ||
9000 | imported_cu = cu; | |
9001 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9002 | &imported_cu); | |
9003 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9004 | if (imported_name == NULL) | |
9005 | { | |
9006 | complaint (&symfile_complaints, | |
9007 | _("child DW_TAG_imported_declaration has unknown " | |
9008 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 9009 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
9010 | continue; |
9011 | } | |
9012 | ||
9013 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
9014 | ||
9015 | process_die (child_die, cu); | |
9016 | } | |
9017 | ||
22cee43f PMR |
9018 | add_using_directive (using_directives (cu->language), |
9019 | import_prefix, | |
9020 | canonical_name, | |
9021 | import_alias, | |
9022 | imported_declaration, | |
9023 | excludes, | |
9024 | 0, | |
9025 | &objfile->objfile_obstack); | |
32019081 JK |
9026 | |
9027 | do_cleanups (cleanups); | |
27aa8d6a SW |
9028 | } |
9029 | ||
f4dc4d17 | 9030 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 9031 | |
cb1df416 DJ |
9032 | static void |
9033 | free_cu_line_header (void *arg) | |
9034 | { | |
9a3c8263 | 9035 | struct dwarf2_cu *cu = (struct dwarf2_cu *) arg; |
cb1df416 DJ |
9036 | |
9037 | free_line_header (cu->line_header); | |
9038 | cu->line_header = NULL; | |
9039 | } | |
9040 | ||
1b80a9fa JK |
9041 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9042 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9043 | this, it was first present in GCC release 4.3.0. */ | |
9044 | ||
9045 | static int | |
9046 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9047 | { | |
9048 | if (!cu->checked_producer) | |
9049 | check_producer (cu); | |
9050 | ||
9051 | return cu->producer_is_gcc_lt_4_3; | |
9052 | } | |
9053 | ||
9291a0cd TT |
9054 | static void |
9055 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 9056 | const char **name, const char **comp_dir) |
9291a0cd | 9057 | { |
9291a0cd TT |
9058 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9059 | is not a source language identifier. */ | |
7d45c7c3 KB |
9060 | *name = dwarf2_string_attr (die, DW_AT_name, cu); |
9061 | *comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9062 | |
7d45c7c3 KB |
9063 | if (*comp_dir == NULL |
9064 | && producer_is_gcc_lt_4_3 (cu) && *name != NULL | |
9065 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 9066 | { |
15d034d0 TT |
9067 | char *d = ldirname (*name); |
9068 | ||
9069 | *comp_dir = d; | |
9070 | if (d != NULL) | |
9071 | make_cleanup (xfree, d); | |
9291a0cd TT |
9072 | } |
9073 | if (*comp_dir != NULL) | |
9074 | { | |
9075 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9076 | directory, get rid of it. */ | |
e6a959d6 | 9077 | const char *cp = strchr (*comp_dir, ':'); |
9291a0cd TT |
9078 | |
9079 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
9080 | *comp_dir = cp + 1; | |
9081 | } | |
9082 | ||
9083 | if (*name == NULL) | |
9084 | *name = "<unknown>"; | |
9085 | } | |
9086 | ||
f4dc4d17 DE |
9087 | /* Handle DW_AT_stmt_list for a compilation unit. |
9088 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9089 | COMP_DIR is the compilation directory. LOWPC is passed to |
9090 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9091 | |
9092 | static void | |
9093 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9094 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9095 | { |
527f3840 | 9096 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9097 | struct attribute *attr; |
527f3840 JK |
9098 | unsigned int line_offset; |
9099 | struct line_header line_header_local; | |
9100 | hashval_t line_header_local_hash; | |
9101 | unsigned u; | |
9102 | void **slot; | |
9103 | int decode_mapping; | |
2ab95328 | 9104 | |
f4dc4d17 DE |
9105 | gdb_assert (! cu->per_cu->is_debug_types); |
9106 | ||
2ab95328 | 9107 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9108 | if (attr == NULL) |
9109 | return; | |
9110 | ||
9111 | line_offset = DW_UNSND (attr); | |
9112 | ||
9113 | /* The line header hash table is only created if needed (it exists to | |
9114 | prevent redundant reading of the line table for partial_units). | |
9115 | If we're given a partial_unit, we'll need it. If we're given a | |
9116 | compile_unit, then use the line header hash table if it's already | |
9117 | created, but don't create one just yet. */ | |
9118 | ||
9119 | if (dwarf2_per_objfile->line_header_hash == NULL | |
9120 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 9121 | { |
527f3840 JK |
9122 | dwarf2_per_objfile->line_header_hash |
9123 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
9124 | line_header_eq_voidp, | |
9125 | free_line_header_voidp, | |
9126 | &objfile->objfile_obstack, | |
9127 | hashtab_obstack_allocate, | |
9128 | dummy_obstack_deallocate); | |
9129 | } | |
2ab95328 | 9130 | |
527f3840 JK |
9131 | line_header_local.offset.sect_off = line_offset; |
9132 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; | |
9133 | line_header_local_hash = line_header_hash (&line_header_local); | |
9134 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
9135 | { | |
9136 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9137 | &line_header_local, | |
9138 | line_header_local_hash, NO_INSERT); | |
9139 | ||
9140 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
9141 | is not present in *SLOT (since if there is something in *SLOT then | |
9142 | it will be for a partial_unit). */ | |
9143 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 9144 | { |
527f3840 | 9145 | gdb_assert (*slot != NULL); |
9a3c8263 | 9146 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 9147 | return; |
dee91e82 | 9148 | } |
2ab95328 | 9149 | } |
527f3840 JK |
9150 | |
9151 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
9152 | We always have to call also dwarf_decode_lines for it. */ | |
9153 | cu->line_header = dwarf_decode_line_header (line_offset, cu); | |
9154 | if (cu->line_header == NULL) | |
9155 | return; | |
9156 | ||
9157 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
9158 | slot = NULL; | |
9159 | else | |
9160 | { | |
9161 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9162 | &line_header_local, | |
9163 | line_header_local_hash, INSERT); | |
9164 | gdb_assert (slot != NULL); | |
9165 | } | |
9166 | if (slot != NULL && *slot == NULL) | |
9167 | { | |
9168 | /* This newly decoded line number information unit will be owned | |
9169 | by line_header_hash hash table. */ | |
9170 | *slot = cu->line_header; | |
9171 | } | |
9172 | else | |
9173 | { | |
9174 | /* We cannot free any current entry in (*slot) as that struct line_header | |
9175 | may be already used by multiple CUs. Create only temporary decoded | |
9176 | line_header for this CU - it may happen at most once for each line | |
9177 | number information unit. And if we're not using line_header_hash | |
9178 | then this is what we want as well. */ | |
9179 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
9180 | make_cleanup (free_cu_line_header, cu); | |
9181 | } | |
9182 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
9183 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
9184 | decode_mapping); | |
2ab95328 TT |
9185 | } |
9186 | ||
95554aad | 9187 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 9188 | |
c906108c | 9189 | static void |
e7c27a73 | 9190 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9191 | { |
dee91e82 | 9192 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 9193 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
debd256d | 9194 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 9195 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9196 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9197 | struct attribute *attr; | |
15d034d0 TT |
9198 | const char *name = NULL; |
9199 | const char *comp_dir = NULL; | |
c906108c SS |
9200 | struct die_info *child_die; |
9201 | bfd *abfd = objfile->obfd; | |
e142c38c | 9202 | CORE_ADDR baseaddr; |
6e70227d | 9203 | |
e142c38c | 9204 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9205 | |
fae299cd | 9206 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9207 | |
9208 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9209 | from finish_block. */ | |
2acceee2 | 9210 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 9211 | lowpc = highpc; |
3e29f34a | 9212 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 9213 | |
9291a0cd | 9214 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 9215 | |
95554aad | 9216 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9217 | |
f4b8a18d KW |
9218 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9219 | standardised yet. As a workaround for the language detection we fall | |
9220 | back to the DW_AT_producer string. */ | |
9221 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9222 | cu->language = language_opencl; | |
9223 | ||
3019eac3 DE |
9224 | /* Similar hack for Go. */ |
9225 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9226 | set_cu_language (DW_LANG_Go, cu); | |
9227 | ||
f4dc4d17 | 9228 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
9229 | |
9230 | /* Decode line number information if present. We do this before | |
9231 | processing child DIEs, so that the line header table is available | |
9232 | for DW_AT_decl_file. */ | |
c3b7b696 | 9233 | handle_DW_AT_stmt_list (die, cu, comp_dir, lowpc); |
3019eac3 DE |
9234 | |
9235 | /* Process all dies in compilation unit. */ | |
9236 | if (die->child != NULL) | |
9237 | { | |
9238 | child_die = die->child; | |
9239 | while (child_die && child_die->tag) | |
9240 | { | |
9241 | process_die (child_die, cu); | |
9242 | child_die = sibling_die (child_die); | |
9243 | } | |
9244 | } | |
9245 | ||
9246 | /* Decode macro information, if present. Dwarf 2 macro information | |
9247 | refers to information in the line number info statement program | |
9248 | header, so we can only read it if we've read the header | |
9249 | successfully. */ | |
9250 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
9251 | if (attr && cu->line_header) | |
9252 | { | |
9253 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9254 | complaint (&symfile_complaints, | |
9255 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
9256 | ||
43f3e411 | 9257 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
9258 | } |
9259 | else | |
9260 | { | |
9261 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9262 | if (attr && cu->line_header) | |
9263 | { | |
9264 | unsigned int macro_offset = DW_UNSND (attr); | |
9265 | ||
43f3e411 | 9266 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
9267 | } |
9268 | } | |
9269 | ||
9270 | do_cleanups (back_to); | |
9271 | } | |
9272 | ||
f4dc4d17 DE |
9273 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9274 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9275 | symtabs with another TU and the symtabs have already been created | |
9276 | then restore those symtabs in the line header. | |
9277 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9278 | |
9279 | static void | |
f4dc4d17 | 9280 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9281 | { |
f4dc4d17 DE |
9282 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9283 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
9284 | struct type_unit_group *tu_group; | |
9285 | int first_time; | |
9286 | struct line_header *lh; | |
3019eac3 | 9287 | struct attribute *attr; |
f4dc4d17 | 9288 | unsigned int i, line_offset; |
0186c6a7 | 9289 | struct signatured_type *sig_type; |
3019eac3 | 9290 | |
f4dc4d17 | 9291 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9292 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9293 | |
f4dc4d17 | 9294 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9295 | |
f4dc4d17 | 9296 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9297 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9298 | if (sig_type->type_unit_group == NULL) |
9299 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9300 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9301 | |
9302 | /* If we've already processed this stmt_list there's no real need to | |
9303 | do it again, we could fake it and just recreate the part we need | |
9304 | (file name,index -> symtab mapping). If data shows this optimization | |
9305 | is useful we can do it then. */ | |
43f3e411 | 9306 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
9307 | |
9308 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9309 | debug info. */ | |
9310 | lh = NULL; | |
9311 | if (attr != NULL) | |
3019eac3 | 9312 | { |
f4dc4d17 DE |
9313 | line_offset = DW_UNSND (attr); |
9314 | lh = dwarf_decode_line_header (line_offset, cu); | |
9315 | } | |
9316 | if (lh == NULL) | |
9317 | { | |
9318 | if (first_time) | |
9319 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9320 | else | |
9321 | { | |
9322 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 9323 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9324 | } |
f4dc4d17 | 9325 | return; |
3019eac3 DE |
9326 | } |
9327 | ||
f4dc4d17 DE |
9328 | cu->line_header = lh; |
9329 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 9330 | |
f4dc4d17 DE |
9331 | if (first_time) |
9332 | { | |
43f3e411 | 9333 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 9334 | |
1fd60fc0 DE |
9335 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
9336 | still initializing it, and our caller (a few levels up) | |
9337 | process_full_type_unit still needs to know if this is the first | |
9338 | time. */ | |
9339 | ||
f4dc4d17 DE |
9340 | tu_group->num_symtabs = lh->num_file_names; |
9341 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 9342 | |
f4dc4d17 DE |
9343 | for (i = 0; i < lh->num_file_names; ++i) |
9344 | { | |
d521ce57 | 9345 | const char *dir = NULL; |
f4dc4d17 | 9346 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 9347 | |
afa6c9ab | 9348 | if (fe->dir_index && lh->include_dirs != NULL) |
f4dc4d17 | 9349 | dir = lh->include_dirs[fe->dir_index - 1]; |
4d663531 | 9350 | dwarf2_start_subfile (fe->name, dir); |
3019eac3 | 9351 | |
f4dc4d17 DE |
9352 | if (current_subfile->symtab == NULL) |
9353 | { | |
9354 | /* NOTE: start_subfile will recognize when it's been passed | |
9355 | a file it has already seen. So we can't assume there's a | |
43f3e411 | 9356 | simple mapping from lh->file_names to subfiles, plus |
f4dc4d17 | 9357 | lh->file_names may contain dups. */ |
43f3e411 DE |
9358 | current_subfile->symtab |
9359 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
9360 | } |
9361 | ||
9362 | fe->symtab = current_subfile->symtab; | |
9363 | tu_group->symtabs[i] = fe->symtab; | |
9364 | } | |
9365 | } | |
9366 | else | |
3019eac3 | 9367 | { |
0ab9ce85 | 9368 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 DE |
9369 | |
9370 | for (i = 0; i < lh->num_file_names; ++i) | |
9371 | { | |
9372 | struct file_entry *fe = &lh->file_names[i]; | |
9373 | ||
9374 | fe->symtab = tu_group->symtabs[i]; | |
9375 | } | |
3019eac3 DE |
9376 | } |
9377 | ||
f4dc4d17 DE |
9378 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9379 | so they don't have a "real" (so to speak) symtab anyway. | |
9380 | There is later code that will assign the main symtab to all symbols | |
9381 | that don't have one. We need to handle the case of a symbol with a | |
9382 | missing symtab (DW_AT_decl_file) anyway. */ | |
9383 | } | |
3019eac3 | 9384 | |
f4dc4d17 DE |
9385 | /* Process DW_TAG_type_unit. |
9386 | For TUs we want to skip the first top level sibling if it's not the | |
9387 | actual type being defined by this TU. In this case the first top | |
9388 | level sibling is there to provide context only. */ | |
3019eac3 | 9389 | |
f4dc4d17 DE |
9390 | static void |
9391 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9392 | { | |
9393 | struct die_info *child_die; | |
3019eac3 | 9394 | |
f4dc4d17 DE |
9395 | prepare_one_comp_unit (cu, die, language_minimal); |
9396 | ||
9397 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9398 | We do this before processing child DIEs, so that the line header table | |
9399 | is available for DW_AT_decl_file. */ | |
9400 | setup_type_unit_groups (die, cu); | |
9401 | ||
9402 | if (die->child != NULL) | |
9403 | { | |
9404 | child_die = die->child; | |
9405 | while (child_die && child_die->tag) | |
9406 | { | |
9407 | process_die (child_die, cu); | |
9408 | child_die = sibling_die (child_die); | |
9409 | } | |
9410 | } | |
3019eac3 DE |
9411 | } |
9412 | \f | |
80626a55 DE |
9413 | /* DWO/DWP files. |
9414 | ||
9415 | http://gcc.gnu.org/wiki/DebugFission | |
9416 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9417 | ||
9418 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9419 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9420 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9421 | |
9422 | static hashval_t | |
9423 | hash_dwo_file (const void *item) | |
9424 | { | |
9a3c8263 | 9425 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 9426 | hashval_t hash; |
3019eac3 | 9427 | |
a2ce51a0 DE |
9428 | hash = htab_hash_string (dwo_file->dwo_name); |
9429 | if (dwo_file->comp_dir != NULL) | |
9430 | hash += htab_hash_string (dwo_file->comp_dir); | |
9431 | return hash; | |
3019eac3 DE |
9432 | } |
9433 | ||
9434 | static int | |
9435 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9436 | { | |
9a3c8263 SM |
9437 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
9438 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 9439 | |
a2ce51a0 DE |
9440 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9441 | return 0; | |
9442 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9443 | return lhs->comp_dir == rhs->comp_dir; | |
9444 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9445 | } |
9446 | ||
9447 | /* Allocate a hash table for DWO files. */ | |
9448 | ||
9449 | static htab_t | |
9450 | allocate_dwo_file_hash_table (void) | |
9451 | { | |
9452 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9453 | ||
9454 | return htab_create_alloc_ex (41, | |
9455 | hash_dwo_file, | |
9456 | eq_dwo_file, | |
9457 | NULL, | |
9458 | &objfile->objfile_obstack, | |
9459 | hashtab_obstack_allocate, | |
9460 | dummy_obstack_deallocate); | |
9461 | } | |
9462 | ||
80626a55 DE |
9463 | /* Lookup DWO file DWO_NAME. */ |
9464 | ||
9465 | static void ** | |
0ac5b59e | 9466 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9467 | { |
9468 | struct dwo_file find_entry; | |
9469 | void **slot; | |
9470 | ||
9471 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9472 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9473 | ||
9474 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9475 | find_entry.dwo_name = dwo_name; |
9476 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9477 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9478 | ||
9479 | return slot; | |
9480 | } | |
9481 | ||
3019eac3 DE |
9482 | static hashval_t |
9483 | hash_dwo_unit (const void *item) | |
9484 | { | |
9a3c8263 | 9485 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
9486 | |
9487 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9488 | return dwo_unit->signature; | |
9489 | } | |
9490 | ||
9491 | static int | |
9492 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9493 | { | |
9a3c8263 SM |
9494 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
9495 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
9496 | |
9497 | /* The signature is assumed to be unique within the DWO file. | |
9498 | So while object file CU dwo_id's always have the value zero, | |
9499 | that's OK, assuming each object file DWO file has only one CU, | |
9500 | and that's the rule for now. */ | |
9501 | return lhs->signature == rhs->signature; | |
9502 | } | |
9503 | ||
9504 | /* Allocate a hash table for DWO CUs,TUs. | |
9505 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9506 | ||
9507 | static htab_t | |
9508 | allocate_dwo_unit_table (struct objfile *objfile) | |
9509 | { | |
9510 | /* Start out with a pretty small number. | |
9511 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9512 | return htab_create_alloc_ex (3, | |
9513 | hash_dwo_unit, | |
9514 | eq_dwo_unit, | |
9515 | NULL, | |
9516 | &objfile->objfile_obstack, | |
9517 | hashtab_obstack_allocate, | |
9518 | dummy_obstack_deallocate); | |
9519 | } | |
9520 | ||
80626a55 | 9521 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9522 | |
19c3d4c9 | 9523 | struct create_dwo_cu_data |
3019eac3 DE |
9524 | { |
9525 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9526 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9527 | }; |
9528 | ||
19c3d4c9 | 9529 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9530 | |
9531 | static void | |
19c3d4c9 DE |
9532 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9533 | const gdb_byte *info_ptr, | |
9534 | struct die_info *comp_unit_die, | |
9535 | int has_children, | |
9536 | void *datap) | |
3019eac3 DE |
9537 | { |
9538 | struct dwarf2_cu *cu = reader->cu; | |
9539 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9540 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 9541 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 9542 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 9543 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9544 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9545 | struct attribute *attr; |
3019eac3 DE |
9546 | |
9547 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9548 | if (attr == NULL) | |
9549 | { | |
19c3d4c9 DE |
9550 | complaint (&symfile_complaints, |
9551 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9552 | " its dwo_id [in module %s]"), | |
9553 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
9554 | return; |
9555 | } | |
9556 | ||
3019eac3 DE |
9557 | dwo_unit->dwo_file = dwo_file; |
9558 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9559 | dwo_unit->section = section; |
3019eac3 DE |
9560 | dwo_unit->offset = offset; |
9561 | dwo_unit->length = cu->per_cu->length; | |
9562 | ||
b4f54984 | 9563 | if (dwarf_read_debug) |
4031ecc5 DE |
9564 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9565 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9566 | } |
9567 | ||
19c3d4c9 DE |
9568 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
9569 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 9570 | |
19c3d4c9 DE |
9571 | static struct dwo_unit * |
9572 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
9573 | { |
9574 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9575 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
9576 | bfd *abfd; | |
9577 | htab_t cu_htab; | |
d521ce57 | 9578 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
9579 | struct create_dwo_cu_data create_dwo_cu_data; |
9580 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
9581 | |
9582 | dwarf2_read_section (objfile, section); | |
9583 | info_ptr = section->buffer; | |
9584 | ||
9585 | if (info_ptr == NULL) | |
9586 | return NULL; | |
9587 | ||
9588 | /* We can't set abfd until now because the section may be empty or | |
9589 | not present, in which case section->asection will be NULL. */ | |
a32a8923 | 9590 | abfd = get_section_bfd_owner (section); |
3019eac3 | 9591 | |
b4f54984 | 9592 | if (dwarf_read_debug) |
19c3d4c9 DE |
9593 | { |
9594 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
a32a8923 DE |
9595 | get_section_name (section), |
9596 | get_section_file_name (section)); | |
19c3d4c9 | 9597 | } |
3019eac3 | 9598 | |
19c3d4c9 DE |
9599 | create_dwo_cu_data.dwo_file = dwo_file; |
9600 | dwo_unit = NULL; | |
3019eac3 DE |
9601 | |
9602 | end_ptr = info_ptr + section->size; | |
9603 | while (info_ptr < end_ptr) | |
9604 | { | |
9605 | struct dwarf2_per_cu_data per_cu; | |
9606 | ||
19c3d4c9 DE |
9607 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9608 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9609 | memset (&per_cu, 0, sizeof (per_cu)); |
9610 | per_cu.objfile = objfile; | |
9611 | per_cu.is_debug_types = 0; | |
9612 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 9613 | per_cu.section = section; |
3019eac3 | 9614 | |
33e80786 | 9615 | init_cutu_and_read_dies_no_follow (&per_cu, dwo_file, |
19c3d4c9 DE |
9616 | create_dwo_cu_reader, |
9617 | &create_dwo_cu_data); | |
9618 | ||
9619 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
9620 | { | |
9621 | /* If we've already found one, complain. We only support one | |
9622 | because having more than one requires hacking the dwo_name of | |
9623 | each to match, which is highly unlikely to happen. */ | |
9624 | if (dwo_unit != NULL) | |
9625 | { | |
9626 | complaint (&symfile_complaints, | |
9627 | _("Multiple CUs in DWO file %s [in module %s]"), | |
4262abfb | 9628 | dwo_file->dwo_name, objfile_name (objfile)); |
19c3d4c9 DE |
9629 | break; |
9630 | } | |
9631 | ||
9632 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9633 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9634 | } | |
3019eac3 DE |
9635 | |
9636 | info_ptr += per_cu.length; | |
9637 | } | |
9638 | ||
19c3d4c9 | 9639 | return dwo_unit; |
3019eac3 DE |
9640 | } |
9641 | ||
80626a55 DE |
9642 | /* DWP file .debug_{cu,tu}_index section format: |
9643 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9644 | ||
d2415c6c DE |
9645 | DWP Version 1: |
9646 | ||
80626a55 DE |
9647 | Both index sections have the same format, and serve to map a 64-bit |
9648 | signature to a set of section numbers. Each section begins with a header, | |
9649 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9650 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9651 | aligned at 8-byte boundaries in the file. | |
9652 | ||
d2415c6c DE |
9653 | The index section header consists of: |
9654 | ||
9655 | V, 32 bit version number | |
9656 | -, 32 bits unused | |
9657 | N, 32 bit number of compilation units or type units in the index | |
9658 | M, 32 bit number of slots in the hash table | |
80626a55 | 9659 | |
d2415c6c | 9660 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9661 | |
d2415c6c DE |
9662 | The hash table begins at offset 16 in the section, and consists of an array |
9663 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9664 | order of the application binary). Unused slots in the hash table are 0. | |
9665 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9666 | |
d2415c6c DE |
9667 | The parallel table begins immediately after the hash table |
9668 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9669 | array of 32-bit indexes (using the byte order of the application binary), | |
9670 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9671 | table contains a 32-bit index into the pool of section numbers. For unused | |
9672 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9673 | |
73869dc2 DE |
9674 | The pool of section numbers begins immediately following the hash table |
9675 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9676 | section numbers consists of an array of 32-bit words (using the byte order | |
9677 | of the application binary). Each item in the array is indexed starting | |
9678 | from 0. The hash table entry provides the index of the first section | |
9679 | number in the set. Additional section numbers in the set follow, and the | |
9680 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9681 | ||
9682 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9683 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9684 | be the second entry. Other members of the set may follow in any order. | |
9685 | ||
9686 | --- | |
9687 | ||
9688 | DWP Version 2: | |
9689 | ||
9690 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9691 | and the entries in the index tables are now offsets into these sections. | |
9692 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9693 | section. | |
9694 | ||
9695 | Index Section Contents: | |
9696 | Header | |
9697 | Hash Table of Signatures dwp_hash_table.hash_table | |
9698 | Parallel Table of Indices dwp_hash_table.unit_table | |
9699 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
9700 | Table of Section Sizes dwp_hash_table.v2.sizes | |
9701 | ||
9702 | The index section header consists of: | |
9703 | ||
9704 | V, 32 bit version number | |
9705 | L, 32 bit number of columns in the table of section offsets | |
9706 | N, 32 bit number of compilation units or type units in the index | |
9707 | M, 32 bit number of slots in the hash table | |
9708 | ||
9709 | Numbers are recorded using the byte order of the application binary. | |
9710 | ||
9711 | The hash table has the same format as version 1. | |
9712 | The parallel table of indices has the same format as version 1, | |
9713 | except that the entries are origin-1 indices into the table of sections | |
9714 | offsets and the table of section sizes. | |
9715 | ||
9716 | The table of offsets begins immediately following the parallel table | |
9717 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
9718 | a two-dimensional array of 32-bit words (using the byte order of the | |
9719 | application binary), with L columns and N+1 rows, in row-major order. | |
9720 | Each row in the array is indexed starting from 0. The first row provides | |
9721 | a key to the remaining rows: each column in this row provides an identifier | |
9722 | for a debug section, and the offsets in the same column of subsequent rows | |
9723 | refer to that section. The section identifiers are: | |
9724 | ||
9725 | DW_SECT_INFO 1 .debug_info.dwo | |
9726 | DW_SECT_TYPES 2 .debug_types.dwo | |
9727 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
9728 | DW_SECT_LINE 4 .debug_line.dwo | |
9729 | DW_SECT_LOC 5 .debug_loc.dwo | |
9730 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
9731 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
9732 | DW_SECT_MACRO 8 .debug_macro.dwo | |
9733 | ||
9734 | The offsets provided by the CU and TU index sections are the base offsets | |
9735 | for the contributions made by each CU or TU to the corresponding section | |
9736 | in the package file. Each CU and TU header contains an abbrev_offset | |
9737 | field, used to find the abbreviations table for that CU or TU within the | |
9738 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
9739 | be interpreted as relative to the base offset given in the index section. | |
9740 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
9741 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
9742 | and offsets into other debug sections obtained from DWARF attributes should | |
9743 | also be interpreted as relative to the corresponding base offset. | |
9744 | ||
9745 | The table of sizes begins immediately following the table of offsets. | |
9746 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
9747 | with L columns and N rows, in row-major order. Each row in the array is | |
9748 | indexed starting from 1 (row 0 is shared by the two tables). | |
9749 | ||
9750 | --- | |
9751 | ||
9752 | Hash table lookup is handled the same in version 1 and 2: | |
9753 | ||
9754 | We assume that N and M will not exceed 2^32 - 1. | |
9755 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
9756 | ||
d2415c6c DE |
9757 | Given a 64-bit compilation unit signature or a type signature S, an entry |
9758 | in the hash table is located as follows: | |
80626a55 | 9759 | |
d2415c6c DE |
9760 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
9761 | the low-order k bits all set to 1. | |
80626a55 | 9762 | |
d2415c6c | 9763 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 9764 | |
d2415c6c DE |
9765 | 3) If the hash table entry at index H matches the signature, use that |
9766 | entry. If the hash table entry at index H is unused (all zeroes), | |
9767 | terminate the search: the signature is not present in the table. | |
80626a55 | 9768 | |
d2415c6c | 9769 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 9770 | |
d2415c6c | 9771 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 9772 | to stop at an unused slot or find the match. */ |
80626a55 DE |
9773 | |
9774 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
9775 | .debug_{info,types}.dwo in DWP_FILE. | |
9776 | Returns NULL if there isn't one. | |
9777 | Note: This function processes DWP files only, not DWO files. */ | |
9778 | ||
9779 | static struct dwp_hash_table * | |
9780 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
9781 | { | |
9782 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9783 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 9784 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 9785 | struct dwarf2_section_info *index; |
73869dc2 | 9786 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
9787 | struct dwp_hash_table *htab; |
9788 | ||
9789 | if (is_debug_types) | |
9790 | index = &dwp_file->sections.tu_index; | |
9791 | else | |
9792 | index = &dwp_file->sections.cu_index; | |
9793 | ||
9794 | if (dwarf2_section_empty_p (index)) | |
9795 | return NULL; | |
9796 | dwarf2_read_section (objfile, index); | |
9797 | ||
9798 | index_ptr = index->buffer; | |
9799 | index_end = index_ptr + index->size; | |
9800 | ||
9801 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
9802 | index_ptr += 4; |
9803 | if (version == 2) | |
9804 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
9805 | else | |
9806 | nr_columns = 0; | |
9807 | index_ptr += 4; | |
80626a55 DE |
9808 | nr_units = read_4_bytes (dbfd, index_ptr); |
9809 | index_ptr += 4; | |
9810 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
9811 | index_ptr += 4; | |
9812 | ||
73869dc2 | 9813 | if (version != 1 && version != 2) |
80626a55 | 9814 | { |
21aa081e | 9815 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 9816 | " [in module %s]"), |
21aa081e | 9817 | pulongest (version), dwp_file->name); |
80626a55 DE |
9818 | } |
9819 | if (nr_slots != (nr_slots & -nr_slots)) | |
9820 | { | |
21aa081e | 9821 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 9822 | " is not power of 2 [in module %s]"), |
21aa081e | 9823 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
9824 | } |
9825 | ||
9826 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
9827 | htab->version = version; |
9828 | htab->nr_columns = nr_columns; | |
80626a55 DE |
9829 | htab->nr_units = nr_units; |
9830 | htab->nr_slots = nr_slots; | |
9831 | htab->hash_table = index_ptr; | |
9832 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
9833 | |
9834 | /* Exit early if the table is empty. */ | |
9835 | if (nr_slots == 0 || nr_units == 0 | |
9836 | || (version == 2 && nr_columns == 0)) | |
9837 | { | |
9838 | /* All must be zero. */ | |
9839 | if (nr_slots != 0 || nr_units != 0 | |
9840 | || (version == 2 && nr_columns != 0)) | |
9841 | { | |
9842 | complaint (&symfile_complaints, | |
9843 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
9844 | " all zero [in modules %s]"), | |
9845 | dwp_file->name); | |
9846 | } | |
9847 | return htab; | |
9848 | } | |
9849 | ||
9850 | if (version == 1) | |
9851 | { | |
9852 | htab->section_pool.v1.indices = | |
9853 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9854 | /* It's harder to decide whether the section is too small in v1. | |
9855 | V1 is deprecated anyway so we punt. */ | |
9856 | } | |
9857 | else | |
9858 | { | |
9859 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9860 | int *ids = htab->section_pool.v2.section_ids; | |
9861 | /* Reverse map for error checking. */ | |
9862 | int ids_seen[DW_SECT_MAX + 1]; | |
9863 | int i; | |
9864 | ||
9865 | if (nr_columns < 2) | |
9866 | { | |
9867 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
9868 | " in section table [in module %s]"), | |
9869 | dwp_file->name); | |
9870 | } | |
9871 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
9872 | { | |
9873 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
9874 | " in section table [in module %s]"), | |
9875 | dwp_file->name); | |
9876 | } | |
9877 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9878 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9879 | for (i = 0; i < nr_columns; ++i) | |
9880 | { | |
9881 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
9882 | ||
9883 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
9884 | { | |
9885 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
9886 | " in section table [in module %s]"), | |
9887 | id, dwp_file->name); | |
9888 | } | |
9889 | if (ids_seen[id] != -1) | |
9890 | { | |
9891 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
9892 | " id %d in section table [in module %s]"), | |
9893 | id, dwp_file->name); | |
9894 | } | |
9895 | ids_seen[id] = i; | |
9896 | ids[i] = id; | |
9897 | } | |
9898 | /* Must have exactly one info or types section. */ | |
9899 | if (((ids_seen[DW_SECT_INFO] != -1) | |
9900 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
9901 | != 1) | |
9902 | { | |
9903 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
9904 | " DWO info/types section [in module %s]"), | |
9905 | dwp_file->name); | |
9906 | } | |
9907 | /* Must have an abbrev section. */ | |
9908 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
9909 | { | |
9910 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
9911 | " section [in module %s]"), | |
9912 | dwp_file->name); | |
9913 | } | |
9914 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
9915 | htab->section_pool.v2.sizes = | |
9916 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
9917 | * nr_units * nr_columns); | |
9918 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
9919 | * nr_units * nr_columns)) | |
9920 | > index_end) | |
9921 | { | |
9922 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
9923 | " [in module %s]"), | |
9924 | dwp_file->name); | |
9925 | } | |
9926 | } | |
80626a55 DE |
9927 | |
9928 | return htab; | |
9929 | } | |
9930 | ||
9931 | /* Update SECTIONS with the data from SECTP. | |
9932 | ||
9933 | This function is like the other "locate" section routines that are | |
9934 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 9935 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
9936 | |
9937 | The result is non-zero for success, or zero if an error was found. */ | |
9938 | ||
9939 | static int | |
73869dc2 DE |
9940 | locate_v1_virtual_dwo_sections (asection *sectp, |
9941 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
9942 | { |
9943 | const struct dwop_section_names *names = &dwop_section_names; | |
9944 | ||
9945 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9946 | { | |
9947 | /* There can be only one. */ | |
049412e3 | 9948 | if (sections->abbrev.s.section != NULL) |
80626a55 | 9949 | return 0; |
049412e3 | 9950 | sections->abbrev.s.section = sectp; |
80626a55 DE |
9951 | sections->abbrev.size = bfd_get_section_size (sectp); |
9952 | } | |
9953 | else if (section_is_p (sectp->name, &names->info_dwo) | |
9954 | || section_is_p (sectp->name, &names->types_dwo)) | |
9955 | { | |
9956 | /* There can be only one. */ | |
049412e3 | 9957 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 9958 | return 0; |
049412e3 | 9959 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
9960 | sections->info_or_types.size = bfd_get_section_size (sectp); |
9961 | } | |
9962 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9963 | { | |
9964 | /* There can be only one. */ | |
049412e3 | 9965 | if (sections->line.s.section != NULL) |
80626a55 | 9966 | return 0; |
049412e3 | 9967 | sections->line.s.section = sectp; |
80626a55 DE |
9968 | sections->line.size = bfd_get_section_size (sectp); |
9969 | } | |
9970 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9971 | { | |
9972 | /* There can be only one. */ | |
049412e3 | 9973 | if (sections->loc.s.section != NULL) |
80626a55 | 9974 | return 0; |
049412e3 | 9975 | sections->loc.s.section = sectp; |
80626a55 DE |
9976 | sections->loc.size = bfd_get_section_size (sectp); |
9977 | } | |
9978 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9979 | { | |
9980 | /* There can be only one. */ | |
049412e3 | 9981 | if (sections->macinfo.s.section != NULL) |
80626a55 | 9982 | return 0; |
049412e3 | 9983 | sections->macinfo.s.section = sectp; |
80626a55 DE |
9984 | sections->macinfo.size = bfd_get_section_size (sectp); |
9985 | } | |
9986 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9987 | { | |
9988 | /* There can be only one. */ | |
049412e3 | 9989 | if (sections->macro.s.section != NULL) |
80626a55 | 9990 | return 0; |
049412e3 | 9991 | sections->macro.s.section = sectp; |
80626a55 DE |
9992 | sections->macro.size = bfd_get_section_size (sectp); |
9993 | } | |
9994 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9995 | { | |
9996 | /* There can be only one. */ | |
049412e3 | 9997 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 9998 | return 0; |
049412e3 | 9999 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10000 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10001 | } | |
10002 | else | |
10003 | { | |
10004 | /* No other kind of section is valid. */ | |
10005 | return 0; | |
10006 | } | |
10007 | ||
10008 | return 1; | |
10009 | } | |
10010 | ||
73869dc2 DE |
10011 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10012 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10013 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10014 | This is for DWP version 1 files. */ | |
80626a55 DE |
10015 | |
10016 | static struct dwo_unit * | |
73869dc2 DE |
10017 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10018 | uint32_t unit_index, | |
10019 | const char *comp_dir, | |
10020 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10021 | { |
10022 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10023 | const struct dwp_hash_table *dwp_htab = |
10024 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10025 | bfd *dbfd = dwp_file->dbfd; |
10026 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10027 | struct dwo_file *dwo_file; | |
10028 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10029 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
10030 | void **dwo_file_slot; |
10031 | char *virtual_dwo_name; | |
10032 | struct dwarf2_section_info *cutu; | |
10033 | struct cleanup *cleanups; | |
10034 | int i; | |
10035 | ||
73869dc2 DE |
10036 | gdb_assert (dwp_file->version == 1); |
10037 | ||
b4f54984 | 10038 | if (dwarf_read_debug) |
80626a55 | 10039 | { |
73869dc2 | 10040 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10041 | kind, |
73869dc2 | 10042 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10043 | dwp_file->name); |
10044 | } | |
10045 | ||
19ac8c2e | 10046 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10047 | Put a limit on the number of sections we look for so that bad data |
10048 | doesn't cause us to loop forever. */ | |
10049 | ||
73869dc2 | 10050 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10051 | (1 /* .debug_info or .debug_types */ \ |
10052 | + 1 /* .debug_abbrev */ \ | |
10053 | + 1 /* .debug_line */ \ | |
10054 | + 1 /* .debug_loc */ \ | |
10055 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10056 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10057 | + 1 /* trailing zero */) |
10058 | ||
10059 | memset (§ions, 0, sizeof (sections)); | |
10060 | cleanups = make_cleanup (null_cleanup, 0); | |
10061 | ||
73869dc2 | 10062 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10063 | { |
10064 | asection *sectp; | |
10065 | uint32_t section_nr = | |
10066 | read_4_bytes (dbfd, | |
73869dc2 DE |
10067 | dwp_htab->section_pool.v1.indices |
10068 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10069 | |
10070 | if (section_nr == 0) | |
10071 | break; | |
10072 | if (section_nr >= dwp_file->num_sections) | |
10073 | { | |
10074 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10075 | " [in module %s]"), | |
10076 | dwp_file->name); | |
10077 | } | |
10078 | ||
10079 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10080 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10081 | { |
10082 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10083 | " [in module %s]"), | |
10084 | dwp_file->name); | |
10085 | } | |
10086 | } | |
10087 | ||
10088 | if (i < 2 | |
a32a8923 DE |
10089 | || dwarf2_section_empty_p (§ions.info_or_types) |
10090 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10091 | { |
10092 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10093 | " [in module %s]"), | |
10094 | dwp_file->name); | |
10095 | } | |
73869dc2 | 10096 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10097 | { |
10098 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10099 | " [in module %s]"), | |
10100 | dwp_file->name); | |
10101 | } | |
10102 | ||
10103 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10104 | have dwo_unit "live" in that. At least for now. | |
10105 | ||
10106 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10107 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10108 | file, we can combine them back into a virtual DWO file to save space |
10109 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10110 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10111 | ||
2792b94d PM |
10112 | virtual_dwo_name = |
10113 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
10114 | get_section_id (§ions.abbrev), |
10115 | get_section_id (§ions.line), | |
10116 | get_section_id (§ions.loc), | |
10117 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
10118 | make_cleanup (xfree, virtual_dwo_name); |
10119 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 10120 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
10121 | /* Create one if necessary. */ |
10122 | if (*dwo_file_slot == NULL) | |
10123 | { | |
b4f54984 | 10124 | if (dwarf_read_debug) |
80626a55 DE |
10125 | { |
10126 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10127 | virtual_dwo_name); | |
10128 | } | |
10129 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10130 | dwo_file->dwo_name |
10131 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10132 | virtual_dwo_name, | |
10133 | strlen (virtual_dwo_name)); | |
0ac5b59e | 10134 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
10135 | dwo_file->sections.abbrev = sections.abbrev; |
10136 | dwo_file->sections.line = sections.line; | |
10137 | dwo_file->sections.loc = sections.loc; | |
10138 | dwo_file->sections.macinfo = sections.macinfo; | |
10139 | dwo_file->sections.macro = sections.macro; | |
10140 | dwo_file->sections.str_offsets = sections.str_offsets; | |
10141 | /* The "str" section is global to the entire DWP file. */ | |
10142 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 10143 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
10144 | there's no need to record it in dwo_file. |
10145 | Also, we can't simply record type sections in dwo_file because | |
10146 | we record a pointer into the vector in dwo_unit. As we collect more | |
10147 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
10148 | for it, invalidating all copies of pointers into the previous |
10149 | contents. */ | |
80626a55 DE |
10150 | *dwo_file_slot = dwo_file; |
10151 | } | |
10152 | else | |
10153 | { | |
b4f54984 | 10154 | if (dwarf_read_debug) |
80626a55 DE |
10155 | { |
10156 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10157 | virtual_dwo_name); | |
10158 | } | |
9a3c8263 | 10159 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 DE |
10160 | } |
10161 | do_cleanups (cleanups); | |
10162 | ||
10163 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10164 | dwo_unit->dwo_file = dwo_file; | |
10165 | dwo_unit->signature = signature; | |
8d749320 SM |
10166 | dwo_unit->section = |
10167 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 10168 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 10169 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
10170 | |
10171 | return dwo_unit; | |
10172 | } | |
10173 | ||
73869dc2 DE |
10174 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
10175 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
10176 | piece within that section used by a TU/CU, return a virtual section | |
10177 | of just that piece. */ | |
10178 | ||
10179 | static struct dwarf2_section_info | |
10180 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
10181 | bfd_size_type offset, bfd_size_type size) | |
10182 | { | |
10183 | struct dwarf2_section_info result; | |
10184 | asection *sectp; | |
10185 | ||
10186 | gdb_assert (section != NULL); | |
10187 | gdb_assert (!section->is_virtual); | |
10188 | ||
10189 | memset (&result, 0, sizeof (result)); | |
10190 | result.s.containing_section = section; | |
10191 | result.is_virtual = 1; | |
10192 | ||
10193 | if (size == 0) | |
10194 | return result; | |
10195 | ||
10196 | sectp = get_section_bfd_section (section); | |
10197 | ||
10198 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10199 | bounds of the real section. This is a pretty-rare event, so just | |
10200 | flag an error (easier) instead of a warning and trying to cope. */ | |
10201 | if (sectp == NULL | |
10202 | || offset + size > bfd_get_section_size (sectp)) | |
10203 | { | |
10204 | bfd *abfd = sectp->owner; | |
10205 | ||
10206 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10207 | " in section %s [in module %s]"), | |
10208 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10209 | objfile_name (dwarf2_per_objfile->objfile)); | |
10210 | } | |
10211 | ||
10212 | result.virtual_offset = offset; | |
10213 | result.size = size; | |
10214 | return result; | |
10215 | } | |
10216 | ||
10217 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10218 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10219 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10220 | This is for DWP version 2 files. */ | |
10221 | ||
10222 | static struct dwo_unit * | |
10223 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10224 | uint32_t unit_index, | |
10225 | const char *comp_dir, | |
10226 | ULONGEST signature, int is_debug_types) | |
10227 | { | |
10228 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10229 | const struct dwp_hash_table *dwp_htab = | |
10230 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10231 | bfd *dbfd = dwp_file->dbfd; | |
10232 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10233 | struct dwo_file *dwo_file; | |
10234 | struct dwo_unit *dwo_unit; | |
10235 | struct virtual_v2_dwo_sections sections; | |
10236 | void **dwo_file_slot; | |
10237 | char *virtual_dwo_name; | |
10238 | struct dwarf2_section_info *cutu; | |
10239 | struct cleanup *cleanups; | |
10240 | int i; | |
10241 | ||
10242 | gdb_assert (dwp_file->version == 2); | |
10243 | ||
b4f54984 | 10244 | if (dwarf_read_debug) |
73869dc2 DE |
10245 | { |
10246 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10247 | kind, | |
10248 | pulongest (unit_index), hex_string (signature), | |
10249 | dwp_file->name); | |
10250 | } | |
10251 | ||
10252 | /* Fetch the section offsets of this DWO unit. */ | |
10253 | ||
10254 | memset (§ions, 0, sizeof (sections)); | |
10255 | cleanups = make_cleanup (null_cleanup, 0); | |
10256 | ||
10257 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10258 | { | |
10259 | uint32_t offset = read_4_bytes (dbfd, | |
10260 | dwp_htab->section_pool.v2.offsets | |
10261 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10262 | + i) | |
10263 | * sizeof (uint32_t))); | |
10264 | uint32_t size = read_4_bytes (dbfd, | |
10265 | dwp_htab->section_pool.v2.sizes | |
10266 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10267 | + i) | |
10268 | * sizeof (uint32_t))); | |
10269 | ||
10270 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10271 | { | |
10272 | case DW_SECT_INFO: | |
10273 | case DW_SECT_TYPES: | |
10274 | sections.info_or_types_offset = offset; | |
10275 | sections.info_or_types_size = size; | |
10276 | break; | |
10277 | case DW_SECT_ABBREV: | |
10278 | sections.abbrev_offset = offset; | |
10279 | sections.abbrev_size = size; | |
10280 | break; | |
10281 | case DW_SECT_LINE: | |
10282 | sections.line_offset = offset; | |
10283 | sections.line_size = size; | |
10284 | break; | |
10285 | case DW_SECT_LOC: | |
10286 | sections.loc_offset = offset; | |
10287 | sections.loc_size = size; | |
10288 | break; | |
10289 | case DW_SECT_STR_OFFSETS: | |
10290 | sections.str_offsets_offset = offset; | |
10291 | sections.str_offsets_size = size; | |
10292 | break; | |
10293 | case DW_SECT_MACINFO: | |
10294 | sections.macinfo_offset = offset; | |
10295 | sections.macinfo_size = size; | |
10296 | break; | |
10297 | case DW_SECT_MACRO: | |
10298 | sections.macro_offset = offset; | |
10299 | sections.macro_size = size; | |
10300 | break; | |
10301 | } | |
10302 | } | |
10303 | ||
10304 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10305 | have dwo_unit "live" in that. At least for now. | |
10306 | ||
10307 | The DWP file can be made up of a random collection of CUs and TUs. | |
10308 | However, for each CU + set of TUs that came from the same original DWO | |
10309 | file, we can combine them back into a virtual DWO file to save space | |
10310 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10311 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10312 | ||
10313 | virtual_dwo_name = | |
10314 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10315 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10316 | (long) (sections.line_size ? sections.line_offset : 0), | |
10317 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10318 | (long) (sections.str_offsets_size | |
10319 | ? sections.str_offsets_offset : 0)); | |
10320 | make_cleanup (xfree, virtual_dwo_name); | |
10321 | /* Can we use an existing virtual DWO file? */ | |
10322 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10323 | /* Create one if necessary. */ | |
10324 | if (*dwo_file_slot == NULL) | |
10325 | { | |
b4f54984 | 10326 | if (dwarf_read_debug) |
73869dc2 DE |
10327 | { |
10328 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10329 | virtual_dwo_name); | |
10330 | } | |
10331 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10332 | dwo_file->dwo_name |
10333 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10334 | virtual_dwo_name, | |
10335 | strlen (virtual_dwo_name)); | |
73869dc2 DE |
10336 | dwo_file->comp_dir = comp_dir; |
10337 | dwo_file->sections.abbrev = | |
10338 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10339 | sections.abbrev_offset, sections.abbrev_size); | |
10340 | dwo_file->sections.line = | |
10341 | create_dwp_v2_section (&dwp_file->sections.line, | |
10342 | sections.line_offset, sections.line_size); | |
10343 | dwo_file->sections.loc = | |
10344 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10345 | sections.loc_offset, sections.loc_size); | |
10346 | dwo_file->sections.macinfo = | |
10347 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10348 | sections.macinfo_offset, sections.macinfo_size); | |
10349 | dwo_file->sections.macro = | |
10350 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10351 | sections.macro_offset, sections.macro_size); | |
10352 | dwo_file->sections.str_offsets = | |
10353 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10354 | sections.str_offsets_offset, | |
10355 | sections.str_offsets_size); | |
10356 | /* The "str" section is global to the entire DWP file. */ | |
10357 | dwo_file->sections.str = dwp_file->sections.str; | |
10358 | /* The info or types section is assigned below to dwo_unit, | |
10359 | there's no need to record it in dwo_file. | |
10360 | Also, we can't simply record type sections in dwo_file because | |
10361 | we record a pointer into the vector in dwo_unit. As we collect more | |
10362 | types we'll grow the vector and eventually have to reallocate space | |
10363 | for it, invalidating all copies of pointers into the previous | |
10364 | contents. */ | |
10365 | *dwo_file_slot = dwo_file; | |
10366 | } | |
10367 | else | |
10368 | { | |
b4f54984 | 10369 | if (dwarf_read_debug) |
73869dc2 DE |
10370 | { |
10371 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10372 | virtual_dwo_name); | |
10373 | } | |
9a3c8263 | 10374 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 DE |
10375 | } |
10376 | do_cleanups (cleanups); | |
10377 | ||
10378 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10379 | dwo_unit->dwo_file = dwo_file; | |
10380 | dwo_unit->signature = signature; | |
8d749320 SM |
10381 | dwo_unit->section = |
10382 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
10383 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
10384 | ? &dwp_file->sections.types | |
10385 | : &dwp_file->sections.info, | |
10386 | sections.info_or_types_offset, | |
10387 | sections.info_or_types_size); | |
10388 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10389 | ||
10390 | return dwo_unit; | |
10391 | } | |
10392 | ||
57d63ce2 DE |
10393 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10394 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10395 | |
10396 | static struct dwo_unit * | |
57d63ce2 DE |
10397 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10398 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10399 | { |
57d63ce2 DE |
10400 | const struct dwp_hash_table *dwp_htab = |
10401 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10402 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10403 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10404 | uint32_t hash = signature & mask; |
10405 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10406 | unsigned int i; | |
10407 | void **slot; | |
10408 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
10409 | ||
10410 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10411 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10412 | slot = htab_find_slot (is_debug_types |
10413 | ? dwp_file->loaded_tus | |
10414 | : dwp_file->loaded_cus, | |
10415 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10416 | |
10417 | if (*slot != NULL) | |
9a3c8263 | 10418 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10419 | |
10420 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10421 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10422 | { |
10423 | ULONGEST signature_in_table; | |
10424 | ||
10425 | signature_in_table = | |
57d63ce2 | 10426 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10427 | if (signature_in_table == signature) |
10428 | { | |
57d63ce2 DE |
10429 | uint32_t unit_index = |
10430 | read_4_bytes (dbfd, | |
10431 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10432 | |
73869dc2 DE |
10433 | if (dwp_file->version == 1) |
10434 | { | |
10435 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10436 | comp_dir, signature, | |
10437 | is_debug_types); | |
10438 | } | |
10439 | else | |
10440 | { | |
10441 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10442 | comp_dir, signature, | |
10443 | is_debug_types); | |
10444 | } | |
9a3c8263 | 10445 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10446 | } |
10447 | if (signature_in_table == 0) | |
10448 | return NULL; | |
10449 | hash = (hash + hash2) & mask; | |
10450 | } | |
10451 | ||
10452 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10453 | " [in module %s]"), | |
10454 | dwp_file->name); | |
10455 | } | |
10456 | ||
ab5088bf | 10457 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10458 | Open the file specified by FILE_NAME and hand it off to BFD for |
10459 | preliminary analysis. Return a newly initialized bfd *, which | |
10460 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10461 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10462 | SEARCH_CWD is true if the current directory is to be searched. |
10463 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10464 | If successful, the file is added to the bfd include table of the |
10465 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10466 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10467 | NOTE: This function is derived from symfile_bfd_open. */ |
10468 | ||
10469 | static bfd * | |
6ac97d4c | 10470 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
10471 | { |
10472 | bfd *sym_bfd; | |
80626a55 | 10473 | int desc, flags; |
3019eac3 | 10474 | char *absolute_name; |
9c02c129 DE |
10475 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10476 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10477 | to debug_file_directory. */ | |
10478 | char *search_path; | |
10479 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10480 | ||
6ac97d4c DE |
10481 | if (search_cwd) |
10482 | { | |
10483 | if (*debug_file_directory != '\0') | |
10484 | search_path = concat (".", dirname_separator_string, | |
10485 | debug_file_directory, NULL); | |
10486 | else | |
10487 | search_path = xstrdup ("."); | |
10488 | } | |
9c02c129 | 10489 | else |
6ac97d4c | 10490 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10491 | |
492c0ab7 | 10492 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10493 | if (is_dwp) |
10494 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10495 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10496 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10497 | xfree (search_path); |
3019eac3 DE |
10498 | if (desc < 0) |
10499 | return NULL; | |
10500 | ||
bb397797 | 10501 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 10502 | xfree (absolute_name); |
9c02c129 DE |
10503 | if (sym_bfd == NULL) |
10504 | return NULL; | |
3019eac3 DE |
10505 | bfd_set_cacheable (sym_bfd, 1); |
10506 | ||
10507 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
10508 | { | |
cbb099e8 | 10509 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
10510 | return NULL; |
10511 | } | |
10512 | ||
13aaf454 DE |
10513 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10514 | This is important because things like demangled_names_hash lives in the | |
10515 | objfile's per_bfd space and may have references to things like symbol | |
10516 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
10517 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd); | |
10518 | ||
3019eac3 DE |
10519 | return sym_bfd; |
10520 | } | |
10521 | ||
ab5088bf | 10522 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10523 | COMP_DIR is the DW_AT_comp_dir attribute. |
10524 | The result is the bfd handle of the file. | |
10525 | If there is a problem finding or opening the file, return NULL. | |
10526 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10527 | same as symfile_bfd_open. */ | |
10528 | ||
10529 | static bfd * | |
ab5088bf | 10530 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
10531 | { |
10532 | bfd *abfd; | |
3019eac3 | 10533 | |
80626a55 | 10534 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10535 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10536 | |
10537 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10538 | ||
10539 | if (comp_dir != NULL) | |
10540 | { | |
80626a55 | 10541 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
10542 | |
10543 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10544 | search path, which seems useful. */ | |
6ac97d4c | 10545 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10546 | xfree (path_to_try); |
10547 | if (abfd != NULL) | |
10548 | return abfd; | |
10549 | } | |
10550 | ||
10551 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10552 | is a list of paths. */ | |
10553 | ||
10554 | if (*debug_file_directory == '\0') | |
10555 | return NULL; | |
10556 | ||
6ac97d4c | 10557 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10558 | } |
10559 | ||
80626a55 DE |
10560 | /* This function is mapped across the sections and remembers the offset and |
10561 | size of each of the DWO debugging sections we are interested in. */ | |
10562 | ||
10563 | static void | |
10564 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10565 | { | |
9a3c8263 | 10566 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
10567 | const struct dwop_section_names *names = &dwop_section_names; |
10568 | ||
10569 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10570 | { | |
049412e3 | 10571 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
10572 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10573 | } | |
10574 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10575 | { | |
049412e3 | 10576 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
10577 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10578 | } | |
10579 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10580 | { | |
049412e3 | 10581 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
10582 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10583 | } | |
10584 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10585 | { | |
049412e3 | 10586 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
10587 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10588 | } | |
10589 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10590 | { | |
049412e3 | 10591 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
10592 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10593 | } | |
10594 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10595 | { | |
049412e3 | 10596 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
10597 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10598 | } | |
10599 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10600 | { | |
049412e3 | 10601 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
10602 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10603 | } | |
10604 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10605 | { | |
049412e3 | 10606 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
10607 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10608 | } | |
10609 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10610 | { | |
10611 | struct dwarf2_section_info type_section; | |
10612 | ||
10613 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 10614 | type_section.s.section = sectp; |
80626a55 DE |
10615 | type_section.size = bfd_get_section_size (sectp); |
10616 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10617 | &type_section); | |
10618 | } | |
10619 | } | |
10620 | ||
ab5088bf | 10621 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10622 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10623 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10624 | |
10625 | static struct dwo_file * | |
0ac5b59e DE |
10626 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10627 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10628 | { |
10629 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10630 | struct dwo_file *dwo_file; |
10631 | bfd *dbfd; | |
3019eac3 DE |
10632 | struct cleanup *cleanups; |
10633 | ||
ab5088bf | 10634 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
10635 | if (dbfd == NULL) |
10636 | { | |
b4f54984 | 10637 | if (dwarf_read_debug) |
80626a55 DE |
10638 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
10639 | return NULL; | |
10640 | } | |
10641 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10642 | dwo_file->dwo_name = dwo_name; |
10643 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 10644 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
10645 | |
10646 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10647 | ||
80626a55 | 10648 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 10649 | |
19c3d4c9 | 10650 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
10651 | |
10652 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
10653 | dwo_file->sections.types); | |
10654 | ||
10655 | discard_cleanups (cleanups); | |
10656 | ||
b4f54984 | 10657 | if (dwarf_read_debug) |
80626a55 DE |
10658 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
10659 | ||
3019eac3 DE |
10660 | return dwo_file; |
10661 | } | |
10662 | ||
80626a55 | 10663 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10664 | size of each of the DWP debugging sections common to version 1 and 2 that |
10665 | we are interested in. */ | |
3019eac3 | 10666 | |
80626a55 | 10667 | static void |
73869dc2 DE |
10668 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10669 | void *dwp_file_ptr) | |
3019eac3 | 10670 | { |
9a3c8263 | 10671 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
10672 | const struct dwop_section_names *names = &dwop_section_names; |
10673 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10674 | |
80626a55 | 10675 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10676 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10677 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10678 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10679 | |
80626a55 DE |
10680 | /* Look for specific sections that we need. */ |
10681 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10682 | { | |
049412e3 | 10683 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
10684 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10685 | } | |
10686 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10687 | { | |
049412e3 | 10688 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
10689 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10690 | } | |
10691 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10692 | { | |
049412e3 | 10693 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
10694 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10695 | } | |
10696 | } | |
3019eac3 | 10697 | |
73869dc2 DE |
10698 | /* This function is mapped across the sections and remembers the offset and |
10699 | size of each of the DWP version 2 debugging sections that we are interested | |
10700 | in. This is split into a separate function because we don't know if we | |
10701 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10702 | ||
10703 | static void | |
10704 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10705 | { | |
9a3c8263 | 10706 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
10707 | const struct dwop_section_names *names = &dwop_section_names; |
10708 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10709 | ||
10710 | /* Record the ELF section number for later lookup: this is what the | |
10711 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10712 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10713 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10714 | ||
10715 | /* Look for specific sections that we need. */ | |
10716 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10717 | { | |
049412e3 | 10718 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
10719 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
10720 | } | |
10721 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10722 | { | |
049412e3 | 10723 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
10724 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
10725 | } | |
10726 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10727 | { | |
049412e3 | 10728 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
10729 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
10730 | } | |
10731 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10732 | { | |
049412e3 | 10733 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
10734 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
10735 | } | |
10736 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10737 | { | |
049412e3 | 10738 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
10739 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
10740 | } | |
10741 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10742 | { | |
049412e3 | 10743 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
10744 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
10745 | } | |
10746 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10747 | { | |
049412e3 | 10748 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
10749 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
10750 | } | |
10751 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10752 | { | |
049412e3 | 10753 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
10754 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
10755 | } | |
10756 | } | |
10757 | ||
80626a55 | 10758 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10759 | |
80626a55 DE |
10760 | static hashval_t |
10761 | hash_dwp_loaded_cutus (const void *item) | |
10762 | { | |
9a3c8263 | 10763 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 10764 | |
80626a55 DE |
10765 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
10766 | return dwo_unit->signature; | |
3019eac3 DE |
10767 | } |
10768 | ||
80626a55 | 10769 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10770 | |
80626a55 DE |
10771 | static int |
10772 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 10773 | { |
9a3c8263 SM |
10774 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
10775 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 10776 | |
80626a55 DE |
10777 | return dua->signature == dub->signature; |
10778 | } | |
3019eac3 | 10779 | |
80626a55 | 10780 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10781 | |
80626a55 DE |
10782 | static htab_t |
10783 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
10784 | { | |
10785 | return htab_create_alloc_ex (3, | |
10786 | hash_dwp_loaded_cutus, | |
10787 | eq_dwp_loaded_cutus, | |
10788 | NULL, | |
10789 | &objfile->objfile_obstack, | |
10790 | hashtab_obstack_allocate, | |
10791 | dummy_obstack_deallocate); | |
10792 | } | |
3019eac3 | 10793 | |
ab5088bf DE |
10794 | /* Try to open DWP file FILE_NAME. |
10795 | The result is the bfd handle of the file. | |
10796 | If there is a problem finding or opening the file, return NULL. | |
10797 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10798 | same as symfile_bfd_open. */ | |
10799 | ||
10800 | static bfd * | |
10801 | open_dwp_file (const char *file_name) | |
10802 | { | |
6ac97d4c DE |
10803 | bfd *abfd; |
10804 | ||
10805 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
10806 | if (abfd != NULL) | |
10807 | return abfd; | |
10808 | ||
10809 | /* Work around upstream bug 15652. | |
10810 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
10811 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
10812 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
10813 | of the executable's path may have discarded the needed info. | |
10814 | [IWBN if the dwp file name was recorded in the executable, akin to | |
10815 | .gnu_debuglink, but that doesn't exist yet.] | |
10816 | Strip the directory from FILE_NAME and search again. */ | |
10817 | if (*debug_file_directory != '\0') | |
10818 | { | |
10819 | /* Don't implicitly search the current directory here. | |
10820 | If the user wants to search "." to handle this case, | |
10821 | it must be added to debug-file-directory. */ | |
10822 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
10823 | 0 /*search_cwd*/); | |
10824 | } | |
10825 | ||
10826 | return NULL; | |
ab5088bf DE |
10827 | } |
10828 | ||
80626a55 DE |
10829 | /* Initialize the use of the DWP file for the current objfile. |
10830 | By convention the name of the DWP file is ${objfile}.dwp. | |
10831 | The result is NULL if it can't be found. */ | |
a766d390 | 10832 | |
80626a55 | 10833 | static struct dwp_file * |
ab5088bf | 10834 | open_and_init_dwp_file (void) |
80626a55 DE |
10835 | { |
10836 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10837 | struct dwp_file *dwp_file; | |
10838 | char *dwp_name; | |
10839 | bfd *dbfd; | |
10840 | struct cleanup *cleanups; | |
10841 | ||
82bf32bc JK |
10842 | /* Try to find first .dwp for the binary file before any symbolic links |
10843 | resolving. */ | |
10844 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
80626a55 DE |
10845 | cleanups = make_cleanup (xfree, dwp_name); |
10846 | ||
ab5088bf | 10847 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
10848 | if (dbfd == NULL |
10849 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
10850 | { | |
10851 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
10852 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
10853 | make_cleanup (xfree, dwp_name); | |
10854 | dbfd = open_dwp_file (dwp_name); | |
10855 | } | |
10856 | ||
80626a55 DE |
10857 | if (dbfd == NULL) |
10858 | { | |
b4f54984 | 10859 | if (dwarf_read_debug) |
80626a55 DE |
10860 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); |
10861 | do_cleanups (cleanups); | |
10862 | return NULL; | |
3019eac3 | 10863 | } |
80626a55 | 10864 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 10865 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
10866 | dwp_file->dbfd = dbfd; |
10867 | do_cleanups (cleanups); | |
c906108c | 10868 | |
80626a55 DE |
10869 | /* +1: section 0 is unused */ |
10870 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
10871 | dwp_file->elf_sections = | |
10872 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
10873 | dwp_file->num_sections, asection *); | |
10874 | ||
73869dc2 | 10875 | bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file); |
80626a55 DE |
10876 | |
10877 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
10878 | ||
10879 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
10880 | ||
73869dc2 DE |
10881 | /* The DWP file version is stored in the hash table. Oh well. */ |
10882 | if (dwp_file->cus->version != dwp_file->tus->version) | |
10883 | { | |
10884 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 10885 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 10886 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
10887 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
10888 | " TU version %s [in DWP file %s]"), | |
10889 | pulongest (dwp_file->cus->version), | |
10890 | pulongest (dwp_file->tus->version), dwp_name); | |
73869dc2 DE |
10891 | } |
10892 | dwp_file->version = dwp_file->cus->version; | |
10893 | ||
10894 | if (dwp_file->version == 2) | |
10895 | bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file); | |
10896 | ||
19ac8c2e DE |
10897 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
10898 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 10899 | |
b4f54984 | 10900 | if (dwarf_read_debug) |
80626a55 DE |
10901 | { |
10902 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
10903 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
10904 | " %s CUs, %s TUs\n", |
10905 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
10906 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
10907 | } |
10908 | ||
10909 | return dwp_file; | |
3019eac3 | 10910 | } |
c906108c | 10911 | |
ab5088bf DE |
10912 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
10913 | ||
10914 | static struct dwp_file * | |
10915 | get_dwp_file (void) | |
10916 | { | |
10917 | if (! dwarf2_per_objfile->dwp_checked) | |
10918 | { | |
10919 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
10920 | dwarf2_per_objfile->dwp_checked = 1; | |
10921 | } | |
10922 | return dwarf2_per_objfile->dwp_file; | |
10923 | } | |
10924 | ||
80626a55 DE |
10925 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
10926 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
10927 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 10928 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
10929 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
10930 | ||
10931 | This is called, for example, when wanting to read a variable with a | |
10932 | complex location. Therefore we don't want to do file i/o for every call. | |
10933 | Therefore we don't want to look for a DWO file on every call. | |
10934 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
10935 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
10936 | for a DWO file. | |
10937 | ||
1c658ad5 | 10938 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 10939 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 10940 | |
3019eac3 | 10941 | static struct dwo_unit * |
80626a55 DE |
10942 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
10943 | const char *dwo_name, const char *comp_dir, | |
10944 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
10945 | { |
10946 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10947 | const char *kind = is_debug_types ? "TU" : "CU"; |
10948 | void **dwo_file_slot; | |
3019eac3 | 10949 | struct dwo_file *dwo_file; |
80626a55 | 10950 | struct dwp_file *dwp_file; |
cb1df416 | 10951 | |
6a506a2d DE |
10952 | /* First see if there's a DWP file. |
10953 | If we have a DWP file but didn't find the DWO inside it, don't | |
10954 | look for the original DWO file. It makes gdb behave differently | |
10955 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 10956 | |
ab5088bf | 10957 | dwp_file = get_dwp_file (); |
80626a55 | 10958 | if (dwp_file != NULL) |
cf2c3c16 | 10959 | { |
80626a55 DE |
10960 | const struct dwp_hash_table *dwp_htab = |
10961 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10962 | ||
10963 | if (dwp_htab != NULL) | |
10964 | { | |
10965 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
10966 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
10967 | signature, is_debug_types); | |
80626a55 DE |
10968 | |
10969 | if (dwo_cutu != NULL) | |
10970 | { | |
b4f54984 | 10971 | if (dwarf_read_debug) |
80626a55 DE |
10972 | { |
10973 | fprintf_unfiltered (gdb_stdlog, | |
10974 | "Virtual DWO %s %s found: @%s\n", | |
10975 | kind, hex_string (signature), | |
10976 | host_address_to_string (dwo_cutu)); | |
10977 | } | |
10978 | return dwo_cutu; | |
10979 | } | |
10980 | } | |
10981 | } | |
6a506a2d | 10982 | else |
80626a55 | 10983 | { |
6a506a2d | 10984 | /* No DWP file, look for the DWO file. */ |
80626a55 | 10985 | |
6a506a2d DE |
10986 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
10987 | if (*dwo_file_slot == NULL) | |
80626a55 | 10988 | { |
6a506a2d DE |
10989 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
10990 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 10991 | } |
6a506a2d | 10992 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 10993 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 10994 | |
6a506a2d | 10995 | if (dwo_file != NULL) |
19c3d4c9 | 10996 | { |
6a506a2d DE |
10997 | struct dwo_unit *dwo_cutu = NULL; |
10998 | ||
10999 | if (is_debug_types && dwo_file->tus) | |
11000 | { | |
11001 | struct dwo_unit find_dwo_cutu; | |
11002 | ||
11003 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11004 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11005 | dwo_cutu |
11006 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d DE |
11007 | } |
11008 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 11009 | { |
6a506a2d DE |
11010 | if (signature == dwo_file->cu->signature) |
11011 | dwo_cutu = dwo_file->cu; | |
11012 | } | |
11013 | ||
11014 | if (dwo_cutu != NULL) | |
11015 | { | |
b4f54984 | 11016 | if (dwarf_read_debug) |
6a506a2d DE |
11017 | { |
11018 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11019 | kind, dwo_name, hex_string (signature), | |
11020 | host_address_to_string (dwo_cutu)); | |
11021 | } | |
11022 | return dwo_cutu; | |
80626a55 DE |
11023 | } |
11024 | } | |
2e276125 | 11025 | } |
9cdd5dbd | 11026 | |
80626a55 DE |
11027 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11028 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11029 | correctly to find the file. */ | |
11030 | ||
b4f54984 | 11031 | if (dwarf_read_debug) |
80626a55 DE |
11032 | { |
11033 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11034 | kind, dwo_name, hex_string (signature)); | |
11035 | } | |
3019eac3 | 11036 | |
6656a72d DE |
11037 | /* This is a warning and not a complaint because it can be caused by |
11038 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11039 | { |
11040 | /* Print the name of the DWP file if we looked there, helps the user | |
11041 | better diagnose the problem. */ | |
11042 | char *dwp_text = NULL; | |
11043 | struct cleanup *cleanups; | |
11044 | ||
11045 | if (dwp_file != NULL) | |
11046 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
11047 | cleanups = make_cleanup (xfree, dwp_text); | |
11048 | ||
11049 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11050 | " [in module %s]"), | |
11051 | kind, dwo_name, hex_string (signature), | |
11052 | dwp_text != NULL ? dwp_text : "", | |
11053 | this_unit->is_debug_types ? "TU" : "CU", | |
11054 | this_unit->offset.sect_off, objfile_name (objfile)); | |
11055 | ||
11056 | do_cleanups (cleanups); | |
11057 | } | |
3019eac3 | 11058 | return NULL; |
5fb290d7 DJ |
11059 | } |
11060 | ||
80626a55 DE |
11061 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11062 | See lookup_dwo_cutu_unit for details. */ | |
11063 | ||
11064 | static struct dwo_unit * | |
11065 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11066 | const char *dwo_name, const char *comp_dir, | |
11067 | ULONGEST signature) | |
11068 | { | |
11069 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11070 | } | |
11071 | ||
11072 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11073 | See lookup_dwo_cutu_unit for details. */ | |
11074 | ||
11075 | static struct dwo_unit * | |
11076 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11077 | const char *dwo_name, const char *comp_dir) | |
11078 | { | |
11079 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11080 | } | |
11081 | ||
89e63ee4 DE |
11082 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11083 | ||
11084 | static int | |
11085 | queue_and_load_dwo_tu (void **slot, void *info) | |
11086 | { | |
11087 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11088 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11089 | ULONGEST signature = dwo_unit->signature; | |
11090 | struct signatured_type *sig_type = | |
11091 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11092 | ||
11093 | if (sig_type != NULL) | |
11094 | { | |
11095 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11096 | ||
11097 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11098 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11099 | while processing PER_CU. */ | |
11100 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11101 | load_full_type_unit (sig_cu); | |
11102 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11103 | } | |
11104 | ||
11105 | return 1; | |
11106 | } | |
11107 | ||
11108 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11109 | The DWO may have the only definition of the type, though it may not be | |
11110 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11111 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11112 | ||
11113 | static void | |
11114 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11115 | { | |
11116 | struct dwo_unit *dwo_unit; | |
11117 | struct dwo_file *dwo_file; | |
11118 | ||
11119 | gdb_assert (!per_cu->is_debug_types); | |
11120 | gdb_assert (get_dwp_file () == NULL); | |
11121 | gdb_assert (per_cu->cu != NULL); | |
11122 | ||
11123 | dwo_unit = per_cu->cu->dwo_unit; | |
11124 | gdb_assert (dwo_unit != NULL); | |
11125 | ||
11126 | dwo_file = dwo_unit->dwo_file; | |
11127 | if (dwo_file->tus != NULL) | |
11128 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
11129 | } | |
11130 | ||
3019eac3 DE |
11131 | /* Free all resources associated with DWO_FILE. |
11132 | Close the DWO file and munmap the sections. | |
11133 | All memory should be on the objfile obstack. */ | |
348e048f DE |
11134 | |
11135 | static void | |
3019eac3 | 11136 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 11137 | { |
3019eac3 DE |
11138 | int ix; |
11139 | struct dwarf2_section_info *section; | |
348e048f | 11140 | |
5c6fa7ab | 11141 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 11142 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 11143 | |
3019eac3 DE |
11144 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
11145 | } | |
348e048f | 11146 | |
3019eac3 | 11147 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 11148 | |
3019eac3 DE |
11149 | static void |
11150 | free_dwo_file_cleanup (void *arg) | |
11151 | { | |
11152 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
11153 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 11154 | |
3019eac3 DE |
11155 | free_dwo_file (dwo_file, objfile); |
11156 | } | |
348e048f | 11157 | |
3019eac3 | 11158 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 11159 | |
3019eac3 DE |
11160 | static int |
11161 | free_dwo_file_from_slot (void **slot, void *info) | |
11162 | { | |
11163 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
11164 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 11165 | |
3019eac3 | 11166 | free_dwo_file (dwo_file, objfile); |
348e048f | 11167 | |
3019eac3 DE |
11168 | return 1; |
11169 | } | |
348e048f | 11170 | |
3019eac3 | 11171 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 11172 | |
3019eac3 DE |
11173 | static void |
11174 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
11175 | { | |
11176 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 11177 | } |
3019eac3 DE |
11178 | \f |
11179 | /* Read in various DIEs. */ | |
348e048f | 11180 | |
d389af10 JK |
11181 | /* qsort helper for inherit_abstract_dies. */ |
11182 | ||
11183 | static int | |
11184 | unsigned_int_compar (const void *ap, const void *bp) | |
11185 | { | |
11186 | unsigned int a = *(unsigned int *) ap; | |
11187 | unsigned int b = *(unsigned int *) bp; | |
11188 | ||
11189 | return (a > b) - (b > a); | |
11190 | } | |
11191 | ||
11192 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
11193 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11194 | already referenced by DW_AT_abstract_origin from the children of the | |
11195 | current DIE. */ | |
d389af10 JK |
11196 | |
11197 | static void | |
11198 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11199 | { | |
11200 | struct die_info *child_die; | |
11201 | unsigned die_children_count; | |
11202 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
11203 | sect_offset *offsets; |
11204 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
11205 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11206 | struct die_info *origin_die; | |
11207 | /* Iterator of the ORIGIN_DIE children. */ | |
11208 | struct die_info *origin_child_die; | |
11209 | struct cleanup *cleanups; | |
11210 | struct attribute *attr; | |
cd02d79d PA |
11211 | struct dwarf2_cu *origin_cu; |
11212 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11213 | |
11214 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11215 | if (!attr) | |
11216 | return; | |
11217 | ||
cd02d79d PA |
11218 | /* Note that following die references may follow to a die in a |
11219 | different cu. */ | |
11220 | ||
11221 | origin_cu = cu; | |
11222 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11223 | ||
11224 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11225 | symbols in. */ | |
11226 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11227 | origin_cu->list_in_scope = cu->list_in_scope; | |
11228 | ||
edb3359d DJ |
11229 | if (die->tag != origin_die->tag |
11230 | && !(die->tag == DW_TAG_inlined_subroutine | |
11231 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11232 | complaint (&symfile_complaints, |
11233 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 11234 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
11235 | |
11236 | child_die = die->child; | |
11237 | die_children_count = 0; | |
11238 | while (child_die && child_die->tag) | |
11239 | { | |
11240 | child_die = sibling_die (child_die); | |
11241 | die_children_count++; | |
11242 | } | |
8d749320 | 11243 | offsets = XNEWVEC (sect_offset, die_children_count); |
d389af10 JK |
11244 | cleanups = make_cleanup (xfree, offsets); |
11245 | ||
11246 | offsets_end = offsets; | |
3ea89b92 PMR |
11247 | for (child_die = die->child; |
11248 | child_die && child_die->tag; | |
11249 | child_die = sibling_die (child_die)) | |
11250 | { | |
11251 | struct die_info *child_origin_die; | |
11252 | struct dwarf2_cu *child_origin_cu; | |
11253 | ||
11254 | /* We are trying to process concrete instance entries: | |
11255 | DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but | |
11256 | it's not relevant to our analysis here. i.e. detecting DIEs that are | |
11257 | present in the abstract instance but not referenced in the concrete | |
11258 | one. */ | |
11259 | if (child_die->tag == DW_TAG_GNU_call_site) | |
11260 | continue; | |
11261 | ||
c38f313d DJ |
11262 | /* For each CHILD_DIE, find the corresponding child of |
11263 | ORIGIN_DIE. If there is more than one layer of | |
11264 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11265 | but GCC versions at least through 4.4 generate this (GCC PR | |
11266 | 40573). */ | |
3ea89b92 PMR |
11267 | child_origin_die = child_die; |
11268 | child_origin_cu = cu; | |
c38f313d DJ |
11269 | while (1) |
11270 | { | |
cd02d79d PA |
11271 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11272 | child_origin_cu); | |
c38f313d DJ |
11273 | if (attr == NULL) |
11274 | break; | |
cd02d79d PA |
11275 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11276 | &child_origin_cu); | |
c38f313d DJ |
11277 | } |
11278 | ||
d389af10 JK |
11279 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11280 | counterpart may exist. */ | |
c38f313d | 11281 | if (child_origin_die != child_die) |
d389af10 | 11282 | { |
edb3359d DJ |
11283 | if (child_die->tag != child_origin_die->tag |
11284 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11285 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11286 | complaint (&symfile_complaints, |
11287 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11288 | "different tags"), child_die->offset.sect_off, |
11289 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11290 | if (child_origin_die->parent != origin_die) |
11291 | complaint (&symfile_complaints, | |
11292 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11293 | "different parents"), child_die->offset.sect_off, |
11294 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11295 | else |
11296 | *offsets_end++ = child_origin_die->offset; | |
d389af10 | 11297 | } |
d389af10 JK |
11298 | } |
11299 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11300 | unsigned_int_compar); | |
11301 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 11302 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
11303 | complaint (&symfile_complaints, |
11304 | _("Multiple children of DIE 0x%x refer " | |
11305 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 11306 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
11307 | |
11308 | offsetp = offsets; | |
11309 | origin_child_die = origin_die->child; | |
11310 | while (origin_child_die && origin_child_die->tag) | |
11311 | { | |
11312 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
11313 | while (offsetp < offsets_end |
11314 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 11315 | offsetp++; |
b64f50a1 JK |
11316 | if (offsetp >= offsets_end |
11317 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 | 11318 | { |
adde2bff DE |
11319 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11320 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11321 | This can happen with mutually referenced abstract_origins. | |
11322 | PR 16581. */ | |
11323 | if (!origin_child_die->in_process) | |
11324 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11325 | } |
11326 | origin_child_die = sibling_die (origin_child_die); | |
11327 | } | |
cd02d79d | 11328 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11329 | |
11330 | do_cleanups (cleanups); | |
11331 | } | |
11332 | ||
c906108c | 11333 | static void |
e7c27a73 | 11334 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11335 | { |
e7c27a73 | 11336 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11337 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11338 | struct context_stack *newobj; |
c906108c SS |
11339 | CORE_ADDR lowpc; |
11340 | CORE_ADDR highpc; | |
11341 | struct die_info *child_die; | |
edb3359d | 11342 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11343 | const char *name; |
e142c38c | 11344 | CORE_ADDR baseaddr; |
801e3a5b | 11345 | struct block *block; |
edb3359d | 11346 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11347 | VEC (symbolp) *template_args = NULL; |
11348 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11349 | |
11350 | if (inlined_func) | |
11351 | { | |
11352 | /* If we do not have call site information, we can't show the | |
11353 | caller of this inlined function. That's too confusing, so | |
11354 | only use the scope for local variables. */ | |
11355 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11356 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11357 | if (call_line == NULL || call_file == NULL) | |
11358 | { | |
11359 | read_lexical_block_scope (die, cu); | |
11360 | return; | |
11361 | } | |
11362 | } | |
c906108c | 11363 | |
e142c38c DJ |
11364 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11365 | ||
94af9270 | 11366 | name = dwarf2_name (die, cu); |
c906108c | 11367 | |
e8d05480 JB |
11368 | /* Ignore functions with missing or empty names. These are actually |
11369 | illegal according to the DWARF standard. */ | |
11370 | if (name == NULL) | |
11371 | { | |
11372 | complaint (&symfile_complaints, | |
b64f50a1 JK |
11373 | _("missing name for subprogram DIE at %d"), |
11374 | die->offset.sect_off); | |
e8d05480 JB |
11375 | return; |
11376 | } | |
11377 | ||
11378 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
11379 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
11380 | { | |
ae4d0c03 PM |
11381 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11382 | if (!attr || !DW_UNSND (attr)) | |
11383 | complaint (&symfile_complaints, | |
3e43a32a MS |
11384 | _("cannot get low and high bounds " |
11385 | "for subprogram DIE at %d"), | |
b64f50a1 | 11386 | die->offset.sect_off); |
e8d05480 JB |
11387 | return; |
11388 | } | |
c906108c | 11389 | |
3e29f34a MR |
11390 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11391 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 11392 | |
34eaf542 TT |
11393 | /* If we have any template arguments, then we must allocate a |
11394 | different sort of symbol. */ | |
11395 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11396 | { | |
11397 | if (child_die->tag == DW_TAG_template_type_param | |
11398 | || child_die->tag == DW_TAG_template_value_param) | |
11399 | { | |
e623cf5d | 11400 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11401 | templ_func->base.is_cplus_template_function = 1; |
11402 | break; | |
11403 | } | |
11404 | } | |
11405 | ||
fe978cb0 PA |
11406 | newobj = push_context (0, lowpc); |
11407 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 11408 | (struct symbol *) templ_func); |
4c2df51b | 11409 | |
4cecd739 DJ |
11410 | /* If there is a location expression for DW_AT_frame_base, record |
11411 | it. */ | |
e142c38c | 11412 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11413 | if (attr) |
fe978cb0 | 11414 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 11415 | |
63e43d3a PMR |
11416 | /* If there is a location for the static link, record it. */ |
11417 | newobj->static_link = NULL; | |
11418 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
11419 | if (attr) | |
11420 | { | |
224c3ddb SM |
11421 | newobj->static_link |
11422 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
11423 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
11424 | } | |
11425 | ||
e142c38c | 11426 | cu->list_in_scope = &local_symbols; |
c906108c | 11427 | |
639d11d3 | 11428 | if (die->child != NULL) |
c906108c | 11429 | { |
639d11d3 | 11430 | child_die = die->child; |
c906108c SS |
11431 | while (child_die && child_die->tag) |
11432 | { | |
34eaf542 TT |
11433 | if (child_die->tag == DW_TAG_template_type_param |
11434 | || child_die->tag == DW_TAG_template_value_param) | |
11435 | { | |
11436 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11437 | ||
f1078f66 DJ |
11438 | if (arg != NULL) |
11439 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11440 | } |
11441 | else | |
11442 | process_die (child_die, cu); | |
c906108c SS |
11443 | child_die = sibling_die (child_die); |
11444 | } | |
11445 | } | |
11446 | ||
d389af10 JK |
11447 | inherit_abstract_dies (die, cu); |
11448 | ||
4a811a97 UW |
11449 | /* If we have a DW_AT_specification, we might need to import using |
11450 | directives from the context of the specification DIE. See the | |
11451 | comment in determine_prefix. */ | |
11452 | if (cu->language == language_cplus | |
11453 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11454 | { | |
11455 | struct dwarf2_cu *spec_cu = cu; | |
11456 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11457 | ||
11458 | while (spec_die) | |
11459 | { | |
11460 | child_die = spec_die->child; | |
11461 | while (child_die && child_die->tag) | |
11462 | { | |
11463 | if (child_die->tag == DW_TAG_imported_module) | |
11464 | process_die (child_die, spec_cu); | |
11465 | child_die = sibling_die (child_die); | |
11466 | } | |
11467 | ||
11468 | /* In some cases, GCC generates specification DIEs that | |
11469 | themselves contain DW_AT_specification attributes. */ | |
11470 | spec_die = die_specification (spec_die, &spec_cu); | |
11471 | } | |
11472 | } | |
11473 | ||
fe978cb0 | 11474 | newobj = pop_context (); |
c906108c | 11475 | /* Make a block for the local symbols within. */ |
fe978cb0 | 11476 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 11477 | newobj->static_link, lowpc, highpc); |
801e3a5b | 11478 | |
df8a16a1 | 11479 | /* For C++, set the block's scope. */ |
45280282 IB |
11480 | if ((cu->language == language_cplus |
11481 | || cu->language == language_fortran | |
11482 | || cu->language == language_d) | |
4d4ec4e5 | 11483 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11484 | block_set_scope (block, determine_prefix (die, cu), |
11485 | &objfile->objfile_obstack); | |
df8a16a1 | 11486 | |
801e3a5b JB |
11487 | /* If we have address ranges, record them. */ |
11488 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11489 | |
fe978cb0 | 11490 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 11491 | |
34eaf542 TT |
11492 | /* Attach template arguments to function. */ |
11493 | if (! VEC_empty (symbolp, template_args)) | |
11494 | { | |
11495 | gdb_assert (templ_func != NULL); | |
11496 | ||
11497 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11498 | templ_func->template_arguments | |
8d749320 SM |
11499 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
11500 | templ_func->n_template_arguments); | |
34eaf542 TT |
11501 | memcpy (templ_func->template_arguments, |
11502 | VEC_address (symbolp, template_args), | |
11503 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11504 | VEC_free (symbolp, template_args); | |
11505 | } | |
11506 | ||
208d8187 JB |
11507 | /* In C++, we can have functions nested inside functions (e.g., when |
11508 | a function declares a class that has methods). This means that | |
11509 | when we finish processing a function scope, we may need to go | |
11510 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 11511 | local_symbols = newobj->locals; |
22cee43f | 11512 | local_using_directives = newobj->local_using_directives; |
208d8187 | 11513 | |
921e78cf JB |
11514 | /* If we've finished processing a top-level function, subsequent |
11515 | symbols go in the file symbol list. */ | |
11516 | if (outermost_context_p ()) | |
e142c38c | 11517 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11518 | } |
11519 | ||
11520 | /* Process all the DIES contained within a lexical block scope. Start | |
11521 | a new scope, process the dies, and then close the scope. */ | |
11522 | ||
11523 | static void | |
e7c27a73 | 11524 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11525 | { |
e7c27a73 | 11526 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11527 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11528 | struct context_stack *newobj; |
c906108c SS |
11529 | CORE_ADDR lowpc, highpc; |
11530 | struct die_info *child_die; | |
e142c38c DJ |
11531 | CORE_ADDR baseaddr; |
11532 | ||
11533 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11534 | |
11535 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11536 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11537 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11538 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11539 | describe ranges. */ |
d85a05f0 | 11540 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c | 11541 | return; |
3e29f34a MR |
11542 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11543 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
11544 | |
11545 | push_context (0, lowpc); | |
639d11d3 | 11546 | if (die->child != NULL) |
c906108c | 11547 | { |
639d11d3 | 11548 | child_die = die->child; |
c906108c SS |
11549 | while (child_die && child_die->tag) |
11550 | { | |
e7c27a73 | 11551 | process_die (child_die, cu); |
c906108c SS |
11552 | child_die = sibling_die (child_die); |
11553 | } | |
11554 | } | |
3ea89b92 | 11555 | inherit_abstract_dies (die, cu); |
fe978cb0 | 11556 | newobj = pop_context (); |
c906108c | 11557 | |
22cee43f | 11558 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 11559 | { |
801e3a5b | 11560 | struct block *block |
63e43d3a | 11561 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 11562 | newobj->start_addr, highpc); |
801e3a5b JB |
11563 | |
11564 | /* Note that recording ranges after traversing children, as we | |
11565 | do here, means that recording a parent's ranges entails | |
11566 | walking across all its children's ranges as they appear in | |
11567 | the address map, which is quadratic behavior. | |
11568 | ||
11569 | It would be nicer to record the parent's ranges before | |
11570 | traversing its children, simply overriding whatever you find | |
11571 | there. But since we don't even decide whether to create a | |
11572 | block until after we've traversed its children, that's hard | |
11573 | to do. */ | |
11574 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 11575 | } |
fe978cb0 | 11576 | local_symbols = newobj->locals; |
22cee43f | 11577 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
11578 | } |
11579 | ||
96408a79 SA |
11580 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
11581 | ||
11582 | static void | |
11583 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11584 | { | |
11585 | struct objfile *objfile = cu->objfile; | |
11586 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11587 | CORE_ADDR pc, baseaddr; | |
11588 | struct attribute *attr; | |
11589 | struct call_site *call_site, call_site_local; | |
11590 | void **slot; | |
11591 | int nparams; | |
11592 | struct die_info *child_die; | |
11593 | ||
11594 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11595 | ||
11596 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11597 | if (!attr) | |
11598 | { | |
11599 | complaint (&symfile_complaints, | |
11600 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
11601 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11602 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11603 | return; |
11604 | } | |
31aa7e4e | 11605 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 11606 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
11607 | |
11608 | if (cu->call_site_htab == NULL) | |
11609 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11610 | NULL, &objfile->objfile_obstack, | |
11611 | hashtab_obstack_allocate, NULL); | |
11612 | call_site_local.pc = pc; | |
11613 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11614 | if (*slot != NULL) | |
11615 | { | |
11616 | complaint (&symfile_complaints, | |
11617 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
11618 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
11619 | paddress (gdbarch, pc), die->offset.sect_off, |
11620 | objfile_name (objfile)); | |
96408a79 SA |
11621 | return; |
11622 | } | |
11623 | ||
11624 | /* Count parameters at the caller. */ | |
11625 | ||
11626 | nparams = 0; | |
11627 | for (child_die = die->child; child_die && child_die->tag; | |
11628 | child_die = sibling_die (child_die)) | |
11629 | { | |
11630 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11631 | { | |
11632 | complaint (&symfile_complaints, | |
11633 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
11634 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
11635 | child_die->tag, child_die->offset.sect_off, |
11636 | objfile_name (objfile)); | |
96408a79 SA |
11637 | continue; |
11638 | } | |
11639 | ||
11640 | nparams++; | |
11641 | } | |
11642 | ||
224c3ddb SM |
11643 | call_site |
11644 | = ((struct call_site *) | |
11645 | obstack_alloc (&objfile->objfile_obstack, | |
11646 | sizeof (*call_site) | |
11647 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
11648 | *slot = call_site; |
11649 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11650 | call_site->pc = pc; | |
11651 | ||
11652 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
11653 | { | |
11654 | struct die_info *func_die; | |
11655 | ||
11656 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11657 | for (func_die = die->parent; | |
11658 | func_die && func_die->tag != DW_TAG_subprogram | |
11659 | && func_die->tag != DW_TAG_subroutine_type; | |
11660 | func_die = func_die->parent); | |
11661 | ||
11662 | /* DW_AT_GNU_all_call_sites is a superset | |
11663 | of DW_AT_GNU_all_tail_call_sites. */ | |
11664 | if (func_die | |
11665 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
11666 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
11667 | { | |
11668 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11669 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11670 | both the initial caller containing the real return address PC and | |
11671 | the final callee containing the current PC of a chain of tail | |
11672 | calls do not need to have the tail call list complete. But any | |
11673 | function candidate for a virtual tail call frame searched via | |
11674 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11675 | determined unambiguously. */ | |
11676 | } | |
11677 | else | |
11678 | { | |
11679 | struct type *func_type = NULL; | |
11680 | ||
11681 | if (func_die) | |
11682 | func_type = get_die_type (func_die, cu); | |
11683 | if (func_type != NULL) | |
11684 | { | |
11685 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11686 | ||
11687 | /* Enlist this call site to the function. */ | |
11688 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11689 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11690 | } | |
11691 | else | |
11692 | complaint (&symfile_complaints, | |
11693 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
11694 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11695 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11696 | } |
11697 | } | |
11698 | ||
11699 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11700 | if (attr == NULL) | |
11701 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11702 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
11703 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
11704 | /* Keep NULL DWARF_BLOCK. */; | |
11705 | else if (attr_form_is_block (attr)) | |
11706 | { | |
11707 | struct dwarf2_locexpr_baton *dlbaton; | |
11708 | ||
8d749320 | 11709 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
11710 | dlbaton->data = DW_BLOCK (attr)->data; |
11711 | dlbaton->size = DW_BLOCK (attr)->size; | |
11712 | dlbaton->per_cu = cu->per_cu; | |
11713 | ||
11714 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
11715 | } | |
7771576e | 11716 | else if (attr_form_is_ref (attr)) |
96408a79 | 11717 | { |
96408a79 SA |
11718 | struct dwarf2_cu *target_cu = cu; |
11719 | struct die_info *target_die; | |
11720 | ||
ac9ec31b | 11721 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
11722 | gdb_assert (target_cu->objfile == objfile); |
11723 | if (die_is_declaration (target_die, target_cu)) | |
11724 | { | |
7d45c7c3 | 11725 | const char *target_physname; |
9112db09 JK |
11726 | |
11727 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
7d45c7c3 KB |
11728 | target_physname = dwarf2_string_attr (target_die, |
11729 | DW_AT_linkage_name, | |
11730 | target_cu); | |
11731 | if (target_physname == NULL) | |
11732 | target_physname = dwarf2_string_attr (target_die, | |
11733 | DW_AT_MIPS_linkage_name, | |
11734 | target_cu); | |
11735 | if (target_physname == NULL) | |
9112db09 | 11736 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
11737 | if (target_physname == NULL) |
11738 | complaint (&symfile_complaints, | |
11739 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11740 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11741 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11742 | else |
7d455152 | 11743 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
11744 | } |
11745 | else | |
11746 | { | |
11747 | CORE_ADDR lowpc; | |
11748 | ||
11749 | /* DW_AT_entry_pc should be preferred. */ | |
11750 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
11751 | complaint (&symfile_complaints, | |
11752 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11753 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11754 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11755 | else |
3e29f34a MR |
11756 | { |
11757 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
11758 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
11759 | } | |
96408a79 SA |
11760 | } |
11761 | } | |
11762 | else | |
11763 | complaint (&symfile_complaints, | |
11764 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
11765 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 11766 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11767 | |
11768 | call_site->per_cu = cu->per_cu; | |
11769 | ||
11770 | for (child_die = die->child; | |
11771 | child_die && child_die->tag; | |
11772 | child_die = sibling_die (child_die)) | |
11773 | { | |
96408a79 | 11774 | struct call_site_parameter *parameter; |
1788b2d3 | 11775 | struct attribute *loc, *origin; |
96408a79 SA |
11776 | |
11777 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11778 | { | |
11779 | /* Already printed the complaint above. */ | |
11780 | continue; | |
11781 | } | |
11782 | ||
11783 | gdb_assert (call_site->parameter_count < nparams); | |
11784 | parameter = &call_site->parameter[call_site->parameter_count]; | |
11785 | ||
1788b2d3 JK |
11786 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
11787 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
11788 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 11789 | |
24c5c679 | 11790 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 11791 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 11792 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
11793 | { |
11794 | sect_offset offset; | |
11795 | ||
11796 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
11797 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
11798 | if (!offset_in_cu_p (&cu->header, offset)) |
11799 | { | |
11800 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
11801 | binding can be done only inside one CU. Such referenced DIE | |
11802 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
11803 | complaint (&symfile_complaints, | |
11804 | _("DW_AT_abstract_origin offset is not in CU for " | |
11805 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11806 | "[in module %s]"), | |
4262abfb | 11807 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
11808 | continue; |
11809 | } | |
1788b2d3 JK |
11810 | parameter->u.param_offset.cu_off = (offset.sect_off |
11811 | - cu->header.offset.sect_off); | |
11812 | } | |
11813 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
11814 | { |
11815 | complaint (&symfile_complaints, | |
11816 | _("No DW_FORM_block* DW_AT_location for " | |
11817 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11818 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11819 | continue; |
11820 | } | |
24c5c679 | 11821 | else |
96408a79 | 11822 | { |
24c5c679 JK |
11823 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
11824 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
11825 | if (parameter->u.dwarf_reg != -1) | |
11826 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
11827 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
11828 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
11829 | ¶meter->u.fb_offset)) | |
11830 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
11831 | else | |
11832 | { | |
11833 | complaint (&symfile_complaints, | |
11834 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
11835 | "for DW_FORM_block* DW_AT_location is supported for " | |
11836 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11837 | "[in module %s]"), | |
4262abfb | 11838 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
11839 | continue; |
11840 | } | |
96408a79 SA |
11841 | } |
11842 | ||
11843 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
11844 | if (!attr_form_is_block (attr)) | |
11845 | { | |
11846 | complaint (&symfile_complaints, | |
11847 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
11848 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11849 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11850 | continue; |
11851 | } | |
11852 | parameter->value = DW_BLOCK (attr)->data; | |
11853 | parameter->value_size = DW_BLOCK (attr)->size; | |
11854 | ||
11855 | /* Parameters are not pre-cleared by memset above. */ | |
11856 | parameter->data_value = NULL; | |
11857 | parameter->data_value_size = 0; | |
11858 | call_site->parameter_count++; | |
11859 | ||
11860 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
11861 | if (attr) | |
11862 | { | |
11863 | if (!attr_form_is_block (attr)) | |
11864 | complaint (&symfile_complaints, | |
11865 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
11866 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11867 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11868 | else |
11869 | { | |
11870 | parameter->data_value = DW_BLOCK (attr)->data; | |
11871 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
11872 | } | |
11873 | } | |
11874 | } | |
11875 | } | |
11876 | ||
43039443 | 11877 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
11878 | Return 1 if the attributes are present and valid, otherwise, return 0. |
11879 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
11880 | |
11881 | static int | |
11882 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
11883 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
11884 | struct partial_symtab *ranges_pst) | |
43039443 JK |
11885 | { |
11886 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 11887 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
11888 | struct comp_unit_head *cu_header = &cu->header; |
11889 | bfd *obfd = objfile->obfd; | |
11890 | unsigned int addr_size = cu_header->addr_size; | |
11891 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11892 | /* Base address selection entry. */ | |
11893 | CORE_ADDR base; | |
11894 | int found_base; | |
11895 | unsigned int dummy; | |
d521ce57 | 11896 | const gdb_byte *buffer; |
43039443 JK |
11897 | int low_set; |
11898 | CORE_ADDR low = 0; | |
11899 | CORE_ADDR high = 0; | |
ff013f42 | 11900 | CORE_ADDR baseaddr; |
43039443 | 11901 | |
d00adf39 DE |
11902 | found_base = cu->base_known; |
11903 | base = cu->base_address; | |
43039443 | 11904 | |
be391dca | 11905 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11906 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
11907 | { |
11908 | complaint (&symfile_complaints, | |
11909 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
11910 | offset); | |
11911 | return 0; | |
11912 | } | |
dce234bc | 11913 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 11914 | |
43039443 JK |
11915 | low_set = 0; |
11916 | ||
e7030f15 | 11917 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 11918 | |
43039443 JK |
11919 | while (1) |
11920 | { | |
11921 | CORE_ADDR range_beginning, range_end; | |
11922 | ||
11923 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
11924 | buffer += addr_size; | |
11925 | range_end = read_address (obfd, buffer, cu, &dummy); | |
11926 | buffer += addr_size; | |
11927 | offset += 2 * addr_size; | |
11928 | ||
11929 | /* An end of list marker is a pair of zero addresses. */ | |
11930 | if (range_beginning == 0 && range_end == 0) | |
11931 | /* Found the end of list entry. */ | |
11932 | break; | |
11933 | ||
11934 | /* Each base address selection entry is a pair of 2 values. | |
11935 | The first is the largest possible address, the second is | |
11936 | the base address. Check for a base address here. */ | |
11937 | if ((range_beginning & mask) == mask) | |
11938 | { | |
28d2bfb9 AB |
11939 | /* If we found the largest possible address, then we already |
11940 | have the base address in range_end. */ | |
11941 | base = range_end; | |
43039443 JK |
11942 | found_base = 1; |
11943 | continue; | |
11944 | } | |
11945 | ||
11946 | if (!found_base) | |
11947 | { | |
11948 | /* We have no valid base address for the ranges | |
11949 | data. */ | |
11950 | complaint (&symfile_complaints, | |
11951 | _("Invalid .debug_ranges data (no base address)")); | |
11952 | return 0; | |
11953 | } | |
11954 | ||
9277c30c UW |
11955 | if (range_beginning > range_end) |
11956 | { | |
11957 | /* Inverted range entries are invalid. */ | |
11958 | complaint (&symfile_complaints, | |
11959 | _("Invalid .debug_ranges data (inverted range)")); | |
11960 | return 0; | |
11961 | } | |
11962 | ||
11963 | /* Empty range entries have no effect. */ | |
11964 | if (range_beginning == range_end) | |
11965 | continue; | |
11966 | ||
43039443 JK |
11967 | range_beginning += base; |
11968 | range_end += base; | |
11969 | ||
01093045 DE |
11970 | /* A not-uncommon case of bad debug info. |
11971 | Don't pollute the addrmap with bad data. */ | |
11972 | if (range_beginning + baseaddr == 0 | |
11973 | && !dwarf2_per_objfile->has_section_at_zero) | |
11974 | { | |
11975 | complaint (&symfile_complaints, | |
11976 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 11977 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
11978 | continue; |
11979 | } | |
11980 | ||
9277c30c | 11981 | if (ranges_pst != NULL) |
3e29f34a MR |
11982 | { |
11983 | CORE_ADDR lowpc; | |
11984 | CORE_ADDR highpc; | |
11985 | ||
11986 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
11987 | range_beginning + baseaddr); | |
11988 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
11989 | range_end + baseaddr); | |
11990 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
11991 | ranges_pst); | |
11992 | } | |
ff013f42 | 11993 | |
43039443 JK |
11994 | /* FIXME: This is recording everything as a low-high |
11995 | segment of consecutive addresses. We should have a | |
11996 | data structure for discontiguous block ranges | |
11997 | instead. */ | |
11998 | if (! low_set) | |
11999 | { | |
12000 | low = range_beginning; | |
12001 | high = range_end; | |
12002 | low_set = 1; | |
12003 | } | |
12004 | else | |
12005 | { | |
12006 | if (range_beginning < low) | |
12007 | low = range_beginning; | |
12008 | if (range_end > high) | |
12009 | high = range_end; | |
12010 | } | |
12011 | } | |
12012 | ||
12013 | if (! low_set) | |
12014 | /* If the first entry is an end-of-list marker, the range | |
12015 | describes an empty scope, i.e. no instructions. */ | |
12016 | return 0; | |
12017 | ||
12018 | if (low_return) | |
12019 | *low_return = low; | |
12020 | if (high_return) | |
12021 | *high_return = high; | |
12022 | return 1; | |
12023 | } | |
12024 | ||
af34e669 DJ |
12025 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
12026 | are present and valid, otherwise, return 0. Return -1 if the range is | |
12027 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 12028 | |
c906108c | 12029 | static int |
af34e669 | 12030 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
12031 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
12032 | struct partial_symtab *pst) | |
c906108c SS |
12033 | { |
12034 | struct attribute *attr; | |
91da1414 | 12035 | struct attribute *attr_high; |
af34e669 DJ |
12036 | CORE_ADDR low = 0; |
12037 | CORE_ADDR high = 0; | |
12038 | int ret = 0; | |
c906108c | 12039 | |
91da1414 MW |
12040 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12041 | if (attr_high) | |
af34e669 | 12042 | { |
e142c38c | 12043 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 12044 | if (attr) |
91da1414 | 12045 | { |
31aa7e4e JB |
12046 | low = attr_value_as_address (attr); |
12047 | high = attr_value_as_address (attr_high); | |
12048 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12049 | high += low; | |
91da1414 | 12050 | } |
af34e669 DJ |
12051 | else |
12052 | /* Found high w/o low attribute. */ | |
12053 | return 0; | |
12054 | ||
12055 | /* Found consecutive range of addresses. */ | |
12056 | ret = 1; | |
12057 | } | |
c906108c | 12058 | else |
af34e669 | 12059 | { |
e142c38c | 12060 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
12061 | if (attr != NULL) |
12062 | { | |
ab435259 DE |
12063 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12064 | We take advantage of the fact that DW_AT_ranges does not appear | |
12065 | in DW_TAG_compile_unit of DWO files. */ | |
12066 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
12067 | unsigned int ranges_offset = (DW_UNSND (attr) | |
12068 | + (need_ranges_base | |
12069 | ? cu->ranges_base | |
12070 | : 0)); | |
2e3cf129 | 12071 | |
af34e669 | 12072 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 12073 | .debug_ranges section. */ |
2e3cf129 | 12074 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 12075 | return 0; |
43039443 | 12076 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
12077 | ret = -1; |
12078 | } | |
12079 | } | |
c906108c | 12080 | |
9373cf26 JK |
12081 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
12082 | if (high <= low) | |
c906108c SS |
12083 | return 0; |
12084 | ||
12085 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
12086 | eliminate duplicate copies of functions and vtables and such. | |
12087 | The linker will arbitrarily choose one and discard the others. | |
12088 | The AT_*_pc values for such functions refer to local labels in | |
12089 | these sections. If the section from that file was discarded, the | |
12090 | labels are not in the output, so the relocs get a value of 0. | |
12091 | If this is a discarded function, mark the pc bounds as invalid, | |
12092 | so that GDB will ignore it. */ | |
72dca2f5 | 12093 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
12094 | return 0; |
12095 | ||
12096 | *lowpc = low; | |
96408a79 SA |
12097 | if (highpc) |
12098 | *highpc = high; | |
af34e669 | 12099 | return ret; |
c906108c SS |
12100 | } |
12101 | ||
b084d499 JB |
12102 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
12103 | its low and high PC addresses. Do nothing if these addresses could not | |
12104 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
12105 | and HIGHPC to the high address if greater than HIGHPC. */ | |
12106 | ||
12107 | static void | |
12108 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
12109 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12110 | struct dwarf2_cu *cu) | |
12111 | { | |
12112 | CORE_ADDR low, high; | |
12113 | struct die_info *child = die->child; | |
12114 | ||
d85a05f0 | 12115 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
12116 | { |
12117 | *lowpc = min (*lowpc, low); | |
12118 | *highpc = max (*highpc, high); | |
12119 | } | |
12120 | ||
12121 | /* If the language does not allow nested subprograms (either inside | |
12122 | subprograms or lexical blocks), we're done. */ | |
12123 | if (cu->language != language_ada) | |
12124 | return; | |
6e70227d | 12125 | |
b084d499 JB |
12126 | /* Check all the children of the given DIE. If it contains nested |
12127 | subprograms, then check their pc bounds. Likewise, we need to | |
12128 | check lexical blocks as well, as they may also contain subprogram | |
12129 | definitions. */ | |
12130 | while (child && child->tag) | |
12131 | { | |
12132 | if (child->tag == DW_TAG_subprogram | |
12133 | || child->tag == DW_TAG_lexical_block) | |
12134 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
12135 | child = sibling_die (child); | |
12136 | } | |
12137 | } | |
12138 | ||
fae299cd DC |
12139 | /* Get the low and high pc's represented by the scope DIE, and store |
12140 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
12141 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
12142 | ||
12143 | static void | |
12144 | get_scope_pc_bounds (struct die_info *die, | |
12145 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12146 | struct dwarf2_cu *cu) | |
12147 | { | |
12148 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
12149 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
12150 | CORE_ADDR current_low, current_high; | |
12151 | ||
d85a05f0 | 12152 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
12153 | { |
12154 | best_low = current_low; | |
12155 | best_high = current_high; | |
12156 | } | |
12157 | else | |
12158 | { | |
12159 | struct die_info *child = die->child; | |
12160 | ||
12161 | while (child && child->tag) | |
12162 | { | |
12163 | switch (child->tag) { | |
12164 | case DW_TAG_subprogram: | |
b084d499 | 12165 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
12166 | break; |
12167 | case DW_TAG_namespace: | |
f55ee35c | 12168 | case DW_TAG_module: |
fae299cd DC |
12169 | /* FIXME: carlton/2004-01-16: Should we do this for |
12170 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
12171 | that current GCC's always emit the DIEs corresponding | |
12172 | to definitions of methods of classes as children of a | |
12173 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
12174 | the DIEs giving the declarations, which could be | |
12175 | anywhere). But I don't see any reason why the | |
12176 | standards says that they have to be there. */ | |
12177 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
12178 | ||
12179 | if (current_low != ((CORE_ADDR) -1)) | |
12180 | { | |
12181 | best_low = min (best_low, current_low); | |
12182 | best_high = max (best_high, current_high); | |
12183 | } | |
12184 | break; | |
12185 | default: | |
0963b4bd | 12186 | /* Ignore. */ |
fae299cd DC |
12187 | break; |
12188 | } | |
12189 | ||
12190 | child = sibling_die (child); | |
12191 | } | |
12192 | } | |
12193 | ||
12194 | *lowpc = best_low; | |
12195 | *highpc = best_high; | |
12196 | } | |
12197 | ||
801e3a5b JB |
12198 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
12199 | in DIE. */ | |
380bca97 | 12200 | |
801e3a5b JB |
12201 | static void |
12202 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
12203 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
12204 | { | |
bb5ed363 | 12205 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12206 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 12207 | struct attribute *attr; |
91da1414 | 12208 | struct attribute *attr_high; |
801e3a5b | 12209 | |
91da1414 MW |
12210 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12211 | if (attr_high) | |
801e3a5b | 12212 | { |
801e3a5b JB |
12213 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
12214 | if (attr) | |
12215 | { | |
31aa7e4e JB |
12216 | CORE_ADDR low = attr_value_as_address (attr); |
12217 | CORE_ADDR high = attr_value_as_address (attr_high); | |
12218 | ||
12219 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12220 | high += low; | |
9a619af0 | 12221 | |
3e29f34a MR |
12222 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
12223 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
12224 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
12225 | } |
12226 | } | |
12227 | ||
12228 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12229 | if (attr) | |
12230 | { | |
bb5ed363 | 12231 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12232 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12233 | We take advantage of the fact that DW_AT_ranges does not appear | |
12234 | in DW_TAG_compile_unit of DWO files. */ | |
12235 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12236 | |
12237 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12238 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12239 | unsigned long offset = (DW_UNSND (attr) |
12240 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12241 | const gdb_byte *buffer; |
801e3a5b JB |
12242 | |
12243 | /* For some target architectures, but not others, the | |
12244 | read_address function sign-extends the addresses it returns. | |
12245 | To recognize base address selection entries, we need a | |
12246 | mask. */ | |
12247 | unsigned int addr_size = cu->header.addr_size; | |
12248 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12249 | ||
12250 | /* The base address, to which the next pair is relative. Note | |
12251 | that this 'base' is a DWARF concept: most entries in a range | |
12252 | list are relative, to reduce the number of relocs against the | |
12253 | debugging information. This is separate from this function's | |
12254 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12255 | information from a shared library based on the address at | |
12256 | which the library was loaded. */ | |
d00adf39 DE |
12257 | CORE_ADDR base = cu->base_address; |
12258 | int base_known = cu->base_known; | |
801e3a5b | 12259 | |
d62bfeaf | 12260 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12261 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
12262 | { |
12263 | complaint (&symfile_complaints, | |
12264 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
12265 | offset); | |
12266 | return; | |
12267 | } | |
d62bfeaf | 12268 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
12269 | |
12270 | for (;;) | |
12271 | { | |
12272 | unsigned int bytes_read; | |
12273 | CORE_ADDR start, end; | |
12274 | ||
12275 | start = read_address (obfd, buffer, cu, &bytes_read); | |
12276 | buffer += bytes_read; | |
12277 | end = read_address (obfd, buffer, cu, &bytes_read); | |
12278 | buffer += bytes_read; | |
12279 | ||
12280 | /* Did we find the end of the range list? */ | |
12281 | if (start == 0 && end == 0) | |
12282 | break; | |
12283 | ||
12284 | /* Did we find a base address selection entry? */ | |
12285 | else if ((start & base_select_mask) == base_select_mask) | |
12286 | { | |
12287 | base = end; | |
12288 | base_known = 1; | |
12289 | } | |
12290 | ||
12291 | /* We found an ordinary address range. */ | |
12292 | else | |
12293 | { | |
12294 | if (!base_known) | |
12295 | { | |
12296 | complaint (&symfile_complaints, | |
3e43a32a MS |
12297 | _("Invalid .debug_ranges data " |
12298 | "(no base address)")); | |
801e3a5b JB |
12299 | return; |
12300 | } | |
12301 | ||
9277c30c UW |
12302 | if (start > end) |
12303 | { | |
12304 | /* Inverted range entries are invalid. */ | |
12305 | complaint (&symfile_complaints, | |
12306 | _("Invalid .debug_ranges data " | |
12307 | "(inverted range)")); | |
12308 | return; | |
12309 | } | |
12310 | ||
12311 | /* Empty range entries have no effect. */ | |
12312 | if (start == end) | |
12313 | continue; | |
12314 | ||
01093045 DE |
12315 | start += base + baseaddr; |
12316 | end += base + baseaddr; | |
12317 | ||
12318 | /* A not-uncommon case of bad debug info. | |
12319 | Don't pollute the addrmap with bad data. */ | |
12320 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
12321 | { | |
12322 | complaint (&symfile_complaints, | |
12323 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12324 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12325 | continue; |
12326 | } | |
12327 | ||
3e29f34a MR |
12328 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
12329 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
01093045 | 12330 | record_block_range (block, start, end - 1); |
801e3a5b JB |
12331 | } |
12332 | } | |
12333 | } | |
12334 | } | |
12335 | ||
685b1105 JK |
12336 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12337 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12338 | |
685b1105 JK |
12339 | static void |
12340 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
12341 | { |
12342 | const char *cs; | |
38360086 | 12343 | int major, minor; |
60d5a603 JK |
12344 | |
12345 | if (cu->producer == NULL) | |
12346 | { | |
12347 | /* For unknown compilers expect their behavior is DWARF version | |
12348 | compliant. | |
12349 | ||
12350 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12351 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12352 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12353 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12354 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12355 | } |
b1ffba5a | 12356 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 12357 | { |
38360086 MW |
12358 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
12359 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 12360 | } |
61012eef | 12361 | else if (startswith (cu->producer, "Intel(R) C")) |
685b1105 JK |
12362 | cu->producer_is_icc = 1; |
12363 | else | |
12364 | { | |
12365 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12366 | compliant. */ | |
60d5a603 JK |
12367 | } |
12368 | ||
ba919b58 | 12369 | cu->checked_producer = 1; |
685b1105 | 12370 | } |
ba919b58 | 12371 | |
685b1105 JK |
12372 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12373 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12374 | during 4.6.0 experimental. */ | |
12375 | ||
12376 | static int | |
12377 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12378 | { | |
12379 | if (!cu->checked_producer) | |
12380 | check_producer (cu); | |
12381 | ||
12382 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12383 | } |
12384 | ||
12385 | /* Return the default accessibility type if it is not overriden by | |
12386 | DW_AT_accessibility. */ | |
12387 | ||
12388 | static enum dwarf_access_attribute | |
12389 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12390 | { | |
12391 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12392 | { | |
12393 | /* The default DWARF 2 accessibility for members is public, the default | |
12394 | accessibility for inheritance is private. */ | |
12395 | ||
12396 | if (die->tag != DW_TAG_inheritance) | |
12397 | return DW_ACCESS_public; | |
12398 | else | |
12399 | return DW_ACCESS_private; | |
12400 | } | |
12401 | else | |
12402 | { | |
12403 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12404 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12405 | depends on the container kind. */ | |
12406 | ||
12407 | if (die->parent->tag == DW_TAG_class_type) | |
12408 | return DW_ACCESS_private; | |
12409 | else | |
12410 | return DW_ACCESS_public; | |
12411 | } | |
12412 | } | |
12413 | ||
74ac6d43 TT |
12414 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12415 | offset. If the attribute was not found return 0, otherwise return | |
12416 | 1. If it was found but could not properly be handled, set *OFFSET | |
12417 | to 0. */ | |
12418 | ||
12419 | static int | |
12420 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12421 | LONGEST *offset) | |
12422 | { | |
12423 | struct attribute *attr; | |
12424 | ||
12425 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12426 | if (attr != NULL) | |
12427 | { | |
12428 | *offset = 0; | |
12429 | ||
12430 | /* Note that we do not check for a section offset first here. | |
12431 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12432 | so if we see it, we can assume that a constant form is really | |
12433 | a constant and not a section offset. */ | |
12434 | if (attr_form_is_constant (attr)) | |
12435 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12436 | else if (attr_form_is_section_offset (attr)) | |
12437 | dwarf2_complex_location_expr_complaint (); | |
12438 | else if (attr_form_is_block (attr)) | |
12439 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12440 | else | |
12441 | dwarf2_complex_location_expr_complaint (); | |
12442 | ||
12443 | return 1; | |
12444 | } | |
12445 | ||
12446 | return 0; | |
12447 | } | |
12448 | ||
c906108c SS |
12449 | /* Add an aggregate field to the field list. */ |
12450 | ||
12451 | static void | |
107d2387 | 12452 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12453 | struct dwarf2_cu *cu) |
6e70227d | 12454 | { |
e7c27a73 | 12455 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12456 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12457 | struct nextfield *new_field; |
12458 | struct attribute *attr; | |
12459 | struct field *fp; | |
15d034d0 | 12460 | const char *fieldname = ""; |
c906108c SS |
12461 | |
12462 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12463 | new_field = XNEW (struct nextfield); |
b8c9b27d | 12464 | make_cleanup (xfree, new_field); |
c906108c | 12465 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12466 | |
12467 | if (die->tag == DW_TAG_inheritance) | |
12468 | { | |
12469 | new_field->next = fip->baseclasses; | |
12470 | fip->baseclasses = new_field; | |
12471 | } | |
12472 | else | |
12473 | { | |
12474 | new_field->next = fip->fields; | |
12475 | fip->fields = new_field; | |
12476 | } | |
c906108c SS |
12477 | fip->nfields++; |
12478 | ||
e142c38c | 12479 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12480 | if (attr) |
12481 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12482 | else |
12483 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12484 | if (new_field->accessibility != DW_ACCESS_public) |
12485 | fip->non_public_fields = 1; | |
60d5a603 | 12486 | |
e142c38c | 12487 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12488 | if (attr) |
12489 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12490 | else |
12491 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12492 | |
12493 | fp = &new_field->field; | |
a9a9bd0f | 12494 | |
e142c38c | 12495 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12496 | { |
74ac6d43 TT |
12497 | LONGEST offset; |
12498 | ||
a9a9bd0f | 12499 | /* Data member other than a C++ static data member. */ |
6e70227d | 12500 | |
c906108c | 12501 | /* Get type of field. */ |
e7c27a73 | 12502 | fp->type = die_type (die, cu); |
c906108c | 12503 | |
d6a843b5 | 12504 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12505 | |
c906108c | 12506 | /* Get bit size of field (zero if none). */ |
e142c38c | 12507 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12508 | if (attr) |
12509 | { | |
12510 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12511 | } | |
12512 | else | |
12513 | { | |
12514 | FIELD_BITSIZE (*fp) = 0; | |
12515 | } | |
12516 | ||
12517 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12518 | if (handle_data_member_location (die, cu, &offset)) |
12519 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12520 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12521 | if (attr) |
12522 | { | |
5e2b427d | 12523 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12524 | { |
12525 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12526 | additional bit offset from the MSB of the containing |
12527 | anonymous object to the MSB of the field. We don't | |
12528 | have to do anything special since we don't need to | |
12529 | know the size of the anonymous object. */ | |
f41f5e61 | 12530 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12531 | } |
12532 | else | |
12533 | { | |
12534 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12535 | MSB of the anonymous object, subtract off the number of |
12536 | bits from the MSB of the field to the MSB of the | |
12537 | object, and then subtract off the number of bits of | |
12538 | the field itself. The result is the bit offset of | |
12539 | the LSB of the field. */ | |
c906108c SS |
12540 | int anonymous_size; |
12541 | int bit_offset = DW_UNSND (attr); | |
12542 | ||
e142c38c | 12543 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12544 | if (attr) |
12545 | { | |
12546 | /* The size of the anonymous object containing | |
12547 | the bit field is explicit, so use the | |
12548 | indicated size (in bytes). */ | |
12549 | anonymous_size = DW_UNSND (attr); | |
12550 | } | |
12551 | else | |
12552 | { | |
12553 | /* The size of the anonymous object containing | |
12554 | the bit field must be inferred from the type | |
12555 | attribute of the data member containing the | |
12556 | bit field. */ | |
12557 | anonymous_size = TYPE_LENGTH (fp->type); | |
12558 | } | |
f41f5e61 PA |
12559 | SET_FIELD_BITPOS (*fp, |
12560 | (FIELD_BITPOS (*fp) | |
12561 | + anonymous_size * bits_per_byte | |
12562 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
12563 | } |
12564 | } | |
12565 | ||
12566 | /* Get name of field. */ | |
39cbfefa DJ |
12567 | fieldname = dwarf2_name (die, cu); |
12568 | if (fieldname == NULL) | |
12569 | fieldname = ""; | |
d8151005 DJ |
12570 | |
12571 | /* The name is already allocated along with this objfile, so we don't | |
12572 | need to duplicate it for the type. */ | |
12573 | fp->name = fieldname; | |
c906108c SS |
12574 | |
12575 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 12576 | pointer or virtual base class pointer) to private. */ |
e142c38c | 12577 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 12578 | { |
d48cc9dd | 12579 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
12580 | new_field->accessibility = DW_ACCESS_private; |
12581 | fip->non_public_fields = 1; | |
12582 | } | |
12583 | } | |
a9a9bd0f | 12584 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 12585 | { |
a9a9bd0f DC |
12586 | /* C++ static member. */ |
12587 | ||
12588 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
12589 | is a declaration, but all versions of G++ as of this writing | |
12590 | (so through at least 3.2.1) incorrectly generate | |
12591 | DW_TAG_variable tags. */ | |
6e70227d | 12592 | |
ff355380 | 12593 | const char *physname; |
c906108c | 12594 | |
a9a9bd0f | 12595 | /* Get name of field. */ |
39cbfefa DJ |
12596 | fieldname = dwarf2_name (die, cu); |
12597 | if (fieldname == NULL) | |
c906108c SS |
12598 | return; |
12599 | ||
254e6b9e | 12600 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
12601 | if (attr |
12602 | /* Only create a symbol if this is an external value. | |
12603 | new_symbol checks this and puts the value in the global symbol | |
12604 | table, which we want. If it is not external, new_symbol | |
12605 | will try to put the value in cu->list_in_scope which is wrong. */ | |
12606 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
12607 | { |
12608 | /* A static const member, not much different than an enum as far as | |
12609 | we're concerned, except that we can support more types. */ | |
12610 | new_symbol (die, NULL, cu); | |
12611 | } | |
12612 | ||
2df3850c | 12613 | /* Get physical name. */ |
ff355380 | 12614 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 12615 | |
d8151005 DJ |
12616 | /* The name is already allocated along with this objfile, so we don't |
12617 | need to duplicate it for the type. */ | |
12618 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 12619 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 12620 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
12621 | } |
12622 | else if (die->tag == DW_TAG_inheritance) | |
12623 | { | |
74ac6d43 | 12624 | LONGEST offset; |
d4b96c9a | 12625 | |
74ac6d43 TT |
12626 | /* C++ base class field. */ |
12627 | if (handle_data_member_location (die, cu, &offset)) | |
12628 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 12629 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 12630 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
12631 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
12632 | fip->nbaseclasses++; | |
12633 | } | |
12634 | } | |
12635 | ||
98751a41 JK |
12636 | /* Add a typedef defined in the scope of the FIP's class. */ |
12637 | ||
12638 | static void | |
12639 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
12640 | struct dwarf2_cu *cu) | |
6e70227d | 12641 | { |
98751a41 | 12642 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
12643 | struct typedef_field_list *new_field; |
12644 | struct attribute *attr; | |
12645 | struct typedef_field *fp; | |
12646 | char *fieldname = ""; | |
12647 | ||
12648 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12649 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
12650 | make_cleanup (xfree, new_field); |
12651 | ||
12652 | gdb_assert (die->tag == DW_TAG_typedef); | |
12653 | ||
12654 | fp = &new_field->field; | |
12655 | ||
12656 | /* Get name of field. */ | |
12657 | fp->name = dwarf2_name (die, cu); | |
12658 | if (fp->name == NULL) | |
12659 | return; | |
12660 | ||
12661 | fp->type = read_type_die (die, cu); | |
12662 | ||
12663 | new_field->next = fip->typedef_field_list; | |
12664 | fip->typedef_field_list = new_field; | |
12665 | fip->typedef_field_list_count++; | |
12666 | } | |
12667 | ||
c906108c SS |
12668 | /* Create the vector of fields, and attach it to the type. */ |
12669 | ||
12670 | static void | |
fba45db2 | 12671 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12672 | struct dwarf2_cu *cu) |
c906108c SS |
12673 | { |
12674 | int nfields = fip->nfields; | |
12675 | ||
12676 | /* Record the field count, allocate space for the array of fields, | |
12677 | and create blank accessibility bitfields if necessary. */ | |
12678 | TYPE_NFIELDS (type) = nfields; | |
12679 | TYPE_FIELDS (type) = (struct field *) | |
12680 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
12681 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
12682 | ||
b4ba55a1 | 12683 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
12684 | { |
12685 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12686 | ||
12687 | TYPE_FIELD_PRIVATE_BITS (type) = | |
12688 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12689 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
12690 | ||
12691 | TYPE_FIELD_PROTECTED_BITS (type) = | |
12692 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12693 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
12694 | ||
774b6a14 TT |
12695 | TYPE_FIELD_IGNORE_BITS (type) = |
12696 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12697 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
12698 | } |
12699 | ||
12700 | /* If the type has baseclasses, allocate and clear a bit vector for | |
12701 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 12702 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
12703 | { |
12704 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 12705 | unsigned char *pointer; |
c906108c SS |
12706 | |
12707 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 12708 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 12709 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
12710 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
12711 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
12712 | } | |
12713 | ||
3e43a32a MS |
12714 | /* Copy the saved-up fields into the field vector. Start from the head of |
12715 | the list, adding to the tail of the field array, so that they end up in | |
12716 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
12717 | while (nfields-- > 0) |
12718 | { | |
7d0ccb61 DJ |
12719 | struct nextfield *fieldp; |
12720 | ||
12721 | if (fip->fields) | |
12722 | { | |
12723 | fieldp = fip->fields; | |
12724 | fip->fields = fieldp->next; | |
12725 | } | |
12726 | else | |
12727 | { | |
12728 | fieldp = fip->baseclasses; | |
12729 | fip->baseclasses = fieldp->next; | |
12730 | } | |
12731 | ||
12732 | TYPE_FIELD (type, nfields) = fieldp->field; | |
12733 | switch (fieldp->accessibility) | |
c906108c | 12734 | { |
c5aa993b | 12735 | case DW_ACCESS_private: |
b4ba55a1 JB |
12736 | if (cu->language != language_ada) |
12737 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 12738 | break; |
c906108c | 12739 | |
c5aa993b | 12740 | case DW_ACCESS_protected: |
b4ba55a1 JB |
12741 | if (cu->language != language_ada) |
12742 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 12743 | break; |
c906108c | 12744 | |
c5aa993b JM |
12745 | case DW_ACCESS_public: |
12746 | break; | |
c906108c | 12747 | |
c5aa993b JM |
12748 | default: |
12749 | /* Unknown accessibility. Complain and treat it as public. */ | |
12750 | { | |
e2e0b3e5 | 12751 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 12752 | fieldp->accessibility); |
c5aa993b JM |
12753 | } |
12754 | break; | |
c906108c SS |
12755 | } |
12756 | if (nfields < fip->nbaseclasses) | |
12757 | { | |
7d0ccb61 | 12758 | switch (fieldp->virtuality) |
c906108c | 12759 | { |
c5aa993b JM |
12760 | case DW_VIRTUALITY_virtual: |
12761 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 12762 | if (cu->language == language_ada) |
a73c6dcd | 12763 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
12764 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
12765 | break; | |
c906108c SS |
12766 | } |
12767 | } | |
c906108c SS |
12768 | } |
12769 | } | |
12770 | ||
7d27a96d TT |
12771 | /* Return true if this member function is a constructor, false |
12772 | otherwise. */ | |
12773 | ||
12774 | static int | |
12775 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
12776 | { | |
12777 | const char *fieldname; | |
fe978cb0 | 12778 | const char *type_name; |
7d27a96d TT |
12779 | int len; |
12780 | ||
12781 | if (die->parent == NULL) | |
12782 | return 0; | |
12783 | ||
12784 | if (die->parent->tag != DW_TAG_structure_type | |
12785 | && die->parent->tag != DW_TAG_union_type | |
12786 | && die->parent->tag != DW_TAG_class_type) | |
12787 | return 0; | |
12788 | ||
12789 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
12790 | type_name = dwarf2_name (die->parent, cu); |
12791 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
12792 | return 0; |
12793 | ||
12794 | len = strlen (fieldname); | |
fe978cb0 PA |
12795 | return (strncmp (fieldname, type_name, len) == 0 |
12796 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
12797 | } |
12798 | ||
c906108c SS |
12799 | /* Add a member function to the proper fieldlist. */ |
12800 | ||
12801 | static void | |
107d2387 | 12802 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12803 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 12804 | { |
e7c27a73 | 12805 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12806 | struct attribute *attr; |
12807 | struct fnfieldlist *flp; | |
12808 | int i; | |
12809 | struct fn_field *fnp; | |
15d034d0 | 12810 | const char *fieldname; |
c906108c | 12811 | struct nextfnfield *new_fnfield; |
f792889a | 12812 | struct type *this_type; |
60d5a603 | 12813 | enum dwarf_access_attribute accessibility; |
c906108c | 12814 | |
b4ba55a1 | 12815 | if (cu->language == language_ada) |
a73c6dcd | 12816 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 12817 | |
2df3850c | 12818 | /* Get name of member function. */ |
39cbfefa DJ |
12819 | fieldname = dwarf2_name (die, cu); |
12820 | if (fieldname == NULL) | |
2df3850c | 12821 | return; |
c906108c | 12822 | |
c906108c SS |
12823 | /* Look up member function name in fieldlist. */ |
12824 | for (i = 0; i < fip->nfnfields; i++) | |
12825 | { | |
27bfe10e | 12826 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
12827 | break; |
12828 | } | |
12829 | ||
12830 | /* Create new list element if necessary. */ | |
12831 | if (i < fip->nfnfields) | |
12832 | flp = &fip->fnfieldlists[i]; | |
12833 | else | |
12834 | { | |
12835 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12836 | { | |
12837 | fip->fnfieldlists = (struct fnfieldlist *) | |
12838 | xrealloc (fip->fnfieldlists, | |
12839 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12840 | * sizeof (struct fnfieldlist)); |
c906108c | 12841 | if (fip->nfnfields == 0) |
c13c43fd | 12842 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
12843 | } |
12844 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
12845 | flp->name = fieldname; | |
12846 | flp->length = 0; | |
12847 | flp->head = NULL; | |
3da10d80 | 12848 | i = fip->nfnfields++; |
c906108c SS |
12849 | } |
12850 | ||
12851 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 12852 | entry. */ |
8d749320 | 12853 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 12854 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
12855 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
12856 | new_fnfield->next = flp->head; | |
12857 | flp->head = new_fnfield; | |
12858 | flp->length++; | |
12859 | ||
12860 | /* Fill in the member function field info. */ | |
12861 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
12862 | |
12863 | /* Delay processing of the physname until later. */ | |
12864 | if (cu->language == language_cplus || cu->language == language_java) | |
12865 | { | |
12866 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
12867 | die, cu); | |
12868 | } | |
12869 | else | |
12870 | { | |
1d06ead6 | 12871 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
12872 | fnp->physname = physname ? physname : ""; |
12873 | } | |
12874 | ||
c906108c | 12875 | fnp->type = alloc_type (objfile); |
f792889a DJ |
12876 | this_type = read_type_die (die, cu); |
12877 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 12878 | { |
f792889a | 12879 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 12880 | |
f792889a | 12881 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
12882 | of the method itself (TYPE_CODE_METHOD). */ |
12883 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
12884 | TYPE_TARGET_TYPE (this_type), |
12885 | TYPE_FIELDS (this_type), | |
12886 | TYPE_NFIELDS (this_type), | |
12887 | TYPE_VARARGS (this_type)); | |
c906108c SS |
12888 | |
12889 | /* Handle static member functions. | |
c5aa993b | 12890 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
12891 | member functions. G++ helps GDB by marking the first |
12892 | parameter for non-static member functions (which is the this | |
12893 | pointer) as artificial. We obtain this information from | |
12894 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 12895 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
12896 | fnp->voffset = VOFFSET_STATIC; |
12897 | } | |
12898 | else | |
e2e0b3e5 | 12899 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 12900 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
12901 | |
12902 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 12903 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 12904 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 12905 | |
3e43a32a MS |
12906 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
12907 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
12908 | |
12909 | /* Get accessibility. */ | |
e142c38c | 12910 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 12911 | if (attr) |
aead7601 | 12912 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
12913 | else |
12914 | accessibility = dwarf2_default_access_attribute (die, cu); | |
12915 | switch (accessibility) | |
c906108c | 12916 | { |
60d5a603 JK |
12917 | case DW_ACCESS_private: |
12918 | fnp->is_private = 1; | |
12919 | break; | |
12920 | case DW_ACCESS_protected: | |
12921 | fnp->is_protected = 1; | |
12922 | break; | |
c906108c SS |
12923 | } |
12924 | ||
b02dede2 | 12925 | /* Check for artificial methods. */ |
e142c38c | 12926 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
12927 | if (attr && DW_UNSND (attr) != 0) |
12928 | fnp->is_artificial = 1; | |
12929 | ||
7d27a96d TT |
12930 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
12931 | ||
0d564a31 | 12932 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
12933 | function. For older versions of GCC, this is an offset in the |
12934 | appropriate virtual table, as specified by DW_AT_containing_type. | |
12935 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
12936 | to the object address. */ |
12937 | ||
e142c38c | 12938 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 12939 | if (attr) |
8e19ed76 | 12940 | { |
aec5aa8b | 12941 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 12942 | { |
aec5aa8b TT |
12943 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
12944 | { | |
12945 | /* Old-style GCC. */ | |
12946 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
12947 | } | |
12948 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12949 | || (DW_BLOCK (attr)->size > 1 | |
12950 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
12951 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
12952 | { | |
12953 | struct dwarf_block blk; | |
12954 | int offset; | |
12955 | ||
12956 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12957 | ? 1 : 2); | |
12958 | blk.size = DW_BLOCK (attr)->size - offset; | |
12959 | blk.data = DW_BLOCK (attr)->data + offset; | |
12960 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
12961 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
12962 | dwarf2_complex_location_expr_complaint (); | |
12963 | else | |
12964 | fnp->voffset /= cu->header.addr_size; | |
12965 | fnp->voffset += 2; | |
12966 | } | |
12967 | else | |
12968 | dwarf2_complex_location_expr_complaint (); | |
12969 | ||
12970 | if (!fnp->fcontext) | |
7e993ebf KS |
12971 | { |
12972 | /* If there is no `this' field and no DW_AT_containing_type, | |
12973 | we cannot actually find a base class context for the | |
12974 | vtable! */ | |
12975 | if (TYPE_NFIELDS (this_type) == 0 | |
12976 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
12977 | { | |
12978 | complaint (&symfile_complaints, | |
12979 | _("cannot determine context for virtual member " | |
12980 | "function \"%s\" (offset %d)"), | |
12981 | fieldname, die->offset.sect_off); | |
12982 | } | |
12983 | else | |
12984 | { | |
12985 | fnp->fcontext | |
12986 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
12987 | } | |
12988 | } | |
aec5aa8b | 12989 | } |
3690dd37 | 12990 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 12991 | { |
4d3c2250 | 12992 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
12993 | } |
12994 | else | |
12995 | { | |
4d3c2250 KB |
12996 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
12997 | fieldname); | |
8e19ed76 | 12998 | } |
0d564a31 | 12999 | } |
d48cc9dd DJ |
13000 | else |
13001 | { | |
13002 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
13003 | if (attr && DW_UNSND (attr)) | |
13004 | { | |
13005 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
13006 | complaint (&symfile_complaints, | |
3e43a32a MS |
13007 | _("Member function \"%s\" (offset %d) is virtual " |
13008 | "but the vtable offset is not specified"), | |
b64f50a1 | 13009 | fieldname, die->offset.sect_off); |
9655fd1a | 13010 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
13011 | TYPE_CPLUS_DYNAMIC (type) = 1; |
13012 | } | |
13013 | } | |
c906108c SS |
13014 | } |
13015 | ||
13016 | /* Create the vector of member function fields, and attach it to the type. */ | |
13017 | ||
13018 | static void | |
fba45db2 | 13019 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13020 | struct dwarf2_cu *cu) |
c906108c SS |
13021 | { |
13022 | struct fnfieldlist *flp; | |
c906108c SS |
13023 | int i; |
13024 | ||
b4ba55a1 | 13025 | if (cu->language == language_ada) |
a73c6dcd | 13026 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 13027 | |
c906108c SS |
13028 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
13029 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
13030 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
13031 | ||
13032 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
13033 | { | |
13034 | struct nextfnfield *nfp = flp->head; | |
13035 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
13036 | int k; | |
13037 | ||
13038 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
13039 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
13040 | fn_flp->fn_fields = (struct fn_field *) | |
13041 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
13042 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 13043 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
13044 | } |
13045 | ||
13046 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
13047 | } |
13048 | ||
1168df01 JB |
13049 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
13050 | language, zero otherwise. */ | |
13051 | static int | |
13052 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
13053 | { | |
13054 | static const char vptr[] = "_vptr"; | |
987504bb | 13055 | static const char vtable[] = "vtable"; |
1168df01 | 13056 | |
987504bb JJ |
13057 | /* Look for the C++ and Java forms of the vtable. */ |
13058 | if ((cu->language == language_java | |
61012eef GB |
13059 | && startswith (name, vtable)) |
13060 | || (startswith (name, vptr) | |
987504bb | 13061 | && is_cplus_marker (name[sizeof (vptr) - 1]))) |
1168df01 JB |
13062 | return 1; |
13063 | ||
13064 | return 0; | |
13065 | } | |
13066 | ||
c0dd20ea | 13067 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
13068 | functions, with the ABI-specified layout. If TYPE describes |
13069 | such a structure, smash it into a member function type. | |
61049d3b DJ |
13070 | |
13071 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
13072 | This is GCC PR debug/28767. */ | |
c0dd20ea | 13073 | |
0b92b5bb TT |
13074 | static void |
13075 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 13076 | { |
09e2d7c7 | 13077 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
13078 | |
13079 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
13080 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
13081 | return; | |
c0dd20ea DJ |
13082 | |
13083 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
13084 | if (TYPE_FIELD_NAME (type, 0) == NULL |
13085 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
13086 | || TYPE_FIELD_NAME (type, 1) == NULL | |
13087 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
13088 | return; | |
c0dd20ea DJ |
13089 | |
13090 | /* Find the type of the method. */ | |
0b92b5bb | 13091 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
13092 | if (pfn_type == NULL |
13093 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
13094 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 13095 | return; |
c0dd20ea DJ |
13096 | |
13097 | /* Look for the "this" argument. */ | |
13098 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
13099 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 13100 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 13101 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 13102 | return; |
c0dd20ea | 13103 | |
09e2d7c7 | 13104 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 13105 | new_type = alloc_type (objfile); |
09e2d7c7 | 13106 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
13107 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
13108 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 13109 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 13110 | } |
1168df01 | 13111 | |
685b1105 JK |
13112 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
13113 | (icc). */ | |
13114 | ||
13115 | static int | |
13116 | producer_is_icc (struct dwarf2_cu *cu) | |
13117 | { | |
13118 | if (!cu->checked_producer) | |
13119 | check_producer (cu); | |
13120 | ||
13121 | return cu->producer_is_icc; | |
13122 | } | |
13123 | ||
c906108c | 13124 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
13125 | (definition) to create a type for the structure or union. Fill in |
13126 | the type's name and general properties; the members will not be | |
83655187 DE |
13127 | processed until process_structure_scope. A symbol table entry for |
13128 | the type will also not be done until process_structure_scope (assuming | |
13129 | the type has a name). | |
c906108c | 13130 | |
c767944b DJ |
13131 | NOTE: we need to call these functions regardless of whether or not the |
13132 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 13133 | structure or union. This gets the type entered into our set of |
83655187 | 13134 | user defined types. */ |
c906108c | 13135 | |
f792889a | 13136 | static struct type * |
134d01f1 | 13137 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13138 | { |
e7c27a73 | 13139 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13140 | struct type *type; |
13141 | struct attribute *attr; | |
15d034d0 | 13142 | const char *name; |
c906108c | 13143 | |
348e048f DE |
13144 | /* If the definition of this type lives in .debug_types, read that type. |
13145 | Don't follow DW_AT_specification though, that will take us back up | |
13146 | the chain and we want to go down. */ | |
45e58e77 | 13147 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13148 | if (attr) |
13149 | { | |
ac9ec31b | 13150 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13151 | |
ac9ec31b | 13152 | /* The type's CU may not be the same as CU. |
02142a6c | 13153 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13154 | return set_die_type (die, type, cu); |
13155 | } | |
13156 | ||
c0dd20ea | 13157 | type = alloc_type (objfile); |
c906108c | 13158 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 13159 | |
39cbfefa DJ |
13160 | name = dwarf2_name (die, cu); |
13161 | if (name != NULL) | |
c906108c | 13162 | { |
987504bb | 13163 | if (cu->language == language_cplus |
45280282 IB |
13164 | || cu->language == language_java |
13165 | || cu->language == language_d) | |
63d06c5c | 13166 | { |
15d034d0 | 13167 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
13168 | |
13169 | /* dwarf2_full_name might have already finished building the DIE's | |
13170 | type. If so, there is no need to continue. */ | |
13171 | if (get_die_type (die, cu) != NULL) | |
13172 | return get_die_type (die, cu); | |
13173 | ||
13174 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
13175 | if (die->tag == DW_TAG_structure_type |
13176 | || die->tag == DW_TAG_class_type) | |
13177 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
13178 | } |
13179 | else | |
13180 | { | |
d8151005 DJ |
13181 | /* The name is already allocated along with this objfile, so |
13182 | we don't need to duplicate it for the type. */ | |
7d455152 | 13183 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
13184 | if (die->tag == DW_TAG_class_type) |
13185 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 13186 | } |
c906108c SS |
13187 | } |
13188 | ||
13189 | if (die->tag == DW_TAG_structure_type) | |
13190 | { | |
13191 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
13192 | } | |
13193 | else if (die->tag == DW_TAG_union_type) | |
13194 | { | |
13195 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
13196 | } | |
13197 | else | |
13198 | { | |
4753d33b | 13199 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
13200 | } |
13201 | ||
0cc2414c TT |
13202 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
13203 | TYPE_DECLARED_CLASS (type) = 1; | |
13204 | ||
e142c38c | 13205 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13206 | if (attr) |
13207 | { | |
155bfbd3 JB |
13208 | if (attr_form_is_constant (attr)) |
13209 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13210 | else | |
13211 | { | |
13212 | /* For the moment, dynamic type sizes are not supported | |
13213 | by GDB's struct type. The actual size is determined | |
13214 | on-demand when resolving the type of a given object, | |
13215 | so set the type's length to zero for now. Otherwise, | |
13216 | we record an expression as the length, and that expression | |
13217 | could lead to a very large value, which could eventually | |
13218 | lead to us trying to allocate that much memory when creating | |
13219 | a value of that type. */ | |
13220 | TYPE_LENGTH (type) = 0; | |
13221 | } | |
c906108c SS |
13222 | } |
13223 | else | |
13224 | { | |
13225 | TYPE_LENGTH (type) = 0; | |
13226 | } | |
13227 | ||
422b1cb0 | 13228 | if (producer_is_icc (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 JK |
13229 | { |
13230 | /* ICC does not output the required DW_AT_declaration | |
13231 | on incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 13232 | TYPE_STUB (type) = 1; |
685b1105 JK |
13233 | } |
13234 | else | |
13235 | TYPE_STUB_SUPPORTED (type) = 1; | |
13236 | ||
dc718098 | 13237 | if (die_is_declaration (die, cu)) |
876cecd0 | 13238 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
13239 | else if (attr == NULL && die->child == NULL |
13240 | && producer_is_realview (cu->producer)) | |
13241 | /* RealView does not output the required DW_AT_declaration | |
13242 | on incomplete types. */ | |
13243 | TYPE_STUB (type) = 1; | |
dc718098 | 13244 | |
c906108c SS |
13245 | /* We need to add the type field to the die immediately so we don't |
13246 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13247 | type within the structure itself. */ |
1c379e20 | 13248 | set_die_type (die, type, cu); |
c906108c | 13249 | |
7e314c57 JK |
13250 | /* set_die_type should be already done. */ |
13251 | set_descriptive_type (type, die, cu); | |
13252 | ||
c767944b DJ |
13253 | return type; |
13254 | } | |
13255 | ||
13256 | /* Finish creating a structure or union type, including filling in | |
13257 | its members and creating a symbol for it. */ | |
13258 | ||
13259 | static void | |
13260 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13261 | { | |
13262 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13263 | struct die_info *child_die; |
c767944b DJ |
13264 | struct type *type; |
13265 | ||
13266 | type = get_die_type (die, cu); | |
13267 | if (type == NULL) | |
13268 | type = read_structure_type (die, cu); | |
13269 | ||
e142c38c | 13270 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13271 | { |
13272 | struct field_info fi; | |
34eaf542 | 13273 | VEC (symbolp) *template_args = NULL; |
c767944b | 13274 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13275 | |
13276 | memset (&fi, 0, sizeof (struct field_info)); | |
13277 | ||
639d11d3 | 13278 | child_die = die->child; |
c906108c SS |
13279 | |
13280 | while (child_die && child_die->tag) | |
13281 | { | |
a9a9bd0f DC |
13282 | if (child_die->tag == DW_TAG_member |
13283 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13284 | { |
a9a9bd0f DC |
13285 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13286 | should be a DW_TAG_member that is a declaration, but | |
13287 | all versions of G++ as of this writing (so through at | |
13288 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13289 | tags for them instead. */ | |
e7c27a73 | 13290 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13291 | } |
8713b1b1 | 13292 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13293 | { |
0963b4bd | 13294 | /* C++ member function. */ |
e7c27a73 | 13295 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
13296 | } |
13297 | else if (child_die->tag == DW_TAG_inheritance) | |
13298 | { | |
13299 | /* C++ base class field. */ | |
e7c27a73 | 13300 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13301 | } |
98751a41 JK |
13302 | else if (child_die->tag == DW_TAG_typedef) |
13303 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13304 | else if (child_die->tag == DW_TAG_template_type_param |
13305 | || child_die->tag == DW_TAG_template_value_param) | |
13306 | { | |
13307 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13308 | ||
f1078f66 DJ |
13309 | if (arg != NULL) |
13310 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13311 | } |
13312 | ||
c906108c SS |
13313 | child_die = sibling_die (child_die); |
13314 | } | |
13315 | ||
34eaf542 TT |
13316 | /* Attach template arguments to type. */ |
13317 | if (! VEC_empty (symbolp, template_args)) | |
13318 | { | |
13319 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13320 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13321 | = VEC_length (symbolp, template_args); | |
13322 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
13323 | = XOBNEWVEC (&objfile->objfile_obstack, |
13324 | struct symbol *, | |
13325 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
13326 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
13327 | VEC_address (symbolp, template_args), | |
13328 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13329 | * sizeof (struct symbol *))); | |
13330 | VEC_free (symbolp, template_args); | |
13331 | } | |
13332 | ||
c906108c SS |
13333 | /* Attach fields and member functions to the type. */ |
13334 | if (fi.nfields) | |
e7c27a73 | 13335 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13336 | if (fi.nfnfields) |
13337 | { | |
e7c27a73 | 13338 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13339 | |
c5aa993b | 13340 | /* Get the type which refers to the base class (possibly this |
c906108c | 13341 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13342 | class from the DW_AT_containing_type attribute. This use of |
13343 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13344 | |
e142c38c | 13345 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13346 | { |
e7c27a73 | 13347 | struct type *t = die_containing_type (die, cu); |
c906108c | 13348 | |
ae6ae975 | 13349 | set_type_vptr_basetype (type, t); |
c906108c SS |
13350 | if (type == t) |
13351 | { | |
c906108c SS |
13352 | int i; |
13353 | ||
13354 | /* Our own class provides vtbl ptr. */ | |
13355 | for (i = TYPE_NFIELDS (t) - 1; | |
13356 | i >= TYPE_N_BASECLASSES (t); | |
13357 | --i) | |
13358 | { | |
0d5cff50 | 13359 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13360 | |
1168df01 | 13361 | if (is_vtable_name (fieldname, cu)) |
c906108c | 13362 | { |
ae6ae975 | 13363 | set_type_vptr_fieldno (type, i); |
c906108c SS |
13364 | break; |
13365 | } | |
13366 | } | |
13367 | ||
13368 | /* Complain if virtual function table field not found. */ | |
13369 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13370 | complaint (&symfile_complaints, |
3e43a32a MS |
13371 | _("virtual function table pointer " |
13372 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13373 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13374 | ""); | |
c906108c SS |
13375 | } |
13376 | else | |
13377 | { | |
ae6ae975 | 13378 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
13379 | } |
13380 | } | |
f6235d4c | 13381 | else if (cu->producer |
61012eef | 13382 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
13383 | { |
13384 | /* The IBM XLC compiler does not provide direct indication | |
13385 | of the containing type, but the vtable pointer is | |
13386 | always named __vfp. */ | |
13387 | ||
13388 | int i; | |
13389 | ||
13390 | for (i = TYPE_NFIELDS (type) - 1; | |
13391 | i >= TYPE_N_BASECLASSES (type); | |
13392 | --i) | |
13393 | { | |
13394 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13395 | { | |
ae6ae975 DE |
13396 | set_type_vptr_fieldno (type, i); |
13397 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
13398 | break; |
13399 | } | |
13400 | } | |
13401 | } | |
c906108c | 13402 | } |
98751a41 JK |
13403 | |
13404 | /* Copy fi.typedef_field_list linked list elements content into the | |
13405 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13406 | if (fi.typedef_field_list) | |
13407 | { | |
13408 | int i = fi.typedef_field_list_count; | |
13409 | ||
a0d7a4ff | 13410 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 13411 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
13412 | = ((struct typedef_field *) |
13413 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
13414 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
13415 | ||
13416 | /* Reverse the list order to keep the debug info elements order. */ | |
13417 | while (--i >= 0) | |
13418 | { | |
13419 | struct typedef_field *dest, *src; | |
6e70227d | 13420 | |
98751a41 JK |
13421 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13422 | src = &fi.typedef_field_list->field; | |
13423 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13424 | *dest = *src; | |
13425 | } | |
13426 | } | |
c767944b DJ |
13427 | |
13428 | do_cleanups (back_to); | |
eb2a6f42 TT |
13429 | |
13430 | if (HAVE_CPLUS_STRUCT (type)) | |
13431 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 13432 | } |
63d06c5c | 13433 | |
bb5ed363 | 13434 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13435 | |
90aeadfc DC |
13436 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13437 | snapshots) has been known to create a die giving a declaration | |
13438 | for a class that has, as a child, a die giving a definition for a | |
13439 | nested class. So we have to process our children even if the | |
13440 | current die is a declaration. Normally, of course, a declaration | |
13441 | won't have any children at all. */ | |
134d01f1 | 13442 | |
ca040673 DE |
13443 | child_die = die->child; |
13444 | ||
90aeadfc DC |
13445 | while (child_die != NULL && child_die->tag) |
13446 | { | |
13447 | if (child_die->tag == DW_TAG_member | |
13448 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13449 | || child_die->tag == DW_TAG_inheritance |
13450 | || child_die->tag == DW_TAG_template_value_param | |
13451 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13452 | { |
90aeadfc | 13453 | /* Do nothing. */ |
134d01f1 | 13454 | } |
90aeadfc DC |
13455 | else |
13456 | process_die (child_die, cu); | |
134d01f1 | 13457 | |
90aeadfc | 13458 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13459 | } |
13460 | ||
fa4028e9 JB |
13461 | /* Do not consider external references. According to the DWARF standard, |
13462 | these DIEs are identified by the fact that they have no byte_size | |
13463 | attribute, and a declaration attribute. */ | |
13464 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13465 | || !die_is_declaration (die, cu)) | |
c767944b | 13466 | new_symbol (die, type, cu); |
134d01f1 DJ |
13467 | } |
13468 | ||
55426c9d JB |
13469 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13470 | update TYPE using some information only available in DIE's children. */ | |
13471 | ||
13472 | static void | |
13473 | update_enumeration_type_from_children (struct die_info *die, | |
13474 | struct type *type, | |
13475 | struct dwarf2_cu *cu) | |
13476 | { | |
13477 | struct obstack obstack; | |
60f7655a | 13478 | struct die_info *child_die; |
55426c9d JB |
13479 | int unsigned_enum = 1; |
13480 | int flag_enum = 1; | |
13481 | ULONGEST mask = 0; | |
13482 | struct cleanup *old_chain; | |
13483 | ||
13484 | obstack_init (&obstack); | |
13485 | old_chain = make_cleanup_obstack_free (&obstack); | |
13486 | ||
60f7655a DE |
13487 | for (child_die = die->child; |
13488 | child_die != NULL && child_die->tag; | |
13489 | child_die = sibling_die (child_die)) | |
55426c9d JB |
13490 | { |
13491 | struct attribute *attr; | |
13492 | LONGEST value; | |
13493 | const gdb_byte *bytes; | |
13494 | struct dwarf2_locexpr_baton *baton; | |
13495 | const char *name; | |
60f7655a | 13496 | |
55426c9d JB |
13497 | if (child_die->tag != DW_TAG_enumerator) |
13498 | continue; | |
13499 | ||
13500 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13501 | if (attr == NULL) | |
13502 | continue; | |
13503 | ||
13504 | name = dwarf2_name (child_die, cu); | |
13505 | if (name == NULL) | |
13506 | name = "<anonymous enumerator>"; | |
13507 | ||
13508 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13509 | &value, &bytes, &baton); | |
13510 | if (value < 0) | |
13511 | { | |
13512 | unsigned_enum = 0; | |
13513 | flag_enum = 0; | |
13514 | } | |
13515 | else if ((mask & value) != 0) | |
13516 | flag_enum = 0; | |
13517 | else | |
13518 | mask |= value; | |
13519 | ||
13520 | /* If we already know that the enum type is neither unsigned, nor | |
13521 | a flag type, no need to look at the rest of the enumerates. */ | |
13522 | if (!unsigned_enum && !flag_enum) | |
13523 | break; | |
55426c9d JB |
13524 | } |
13525 | ||
13526 | if (unsigned_enum) | |
13527 | TYPE_UNSIGNED (type) = 1; | |
13528 | if (flag_enum) | |
13529 | TYPE_FLAG_ENUM (type) = 1; | |
13530 | ||
13531 | do_cleanups (old_chain); | |
13532 | } | |
13533 | ||
134d01f1 DJ |
13534 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
13535 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 13536 | |
f792889a | 13537 | static struct type * |
134d01f1 | 13538 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13539 | { |
e7c27a73 | 13540 | struct objfile *objfile = cu->objfile; |
c906108c | 13541 | struct type *type; |
c906108c | 13542 | struct attribute *attr; |
0114d602 | 13543 | const char *name; |
134d01f1 | 13544 | |
348e048f DE |
13545 | /* If the definition of this type lives in .debug_types, read that type. |
13546 | Don't follow DW_AT_specification though, that will take us back up | |
13547 | the chain and we want to go down. */ | |
45e58e77 | 13548 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13549 | if (attr) |
13550 | { | |
ac9ec31b | 13551 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13552 | |
ac9ec31b | 13553 | /* The type's CU may not be the same as CU. |
02142a6c | 13554 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13555 | return set_die_type (die, type, cu); |
13556 | } | |
13557 | ||
c906108c SS |
13558 | type = alloc_type (objfile); |
13559 | ||
13560 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 13561 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 13562 | if (name != NULL) |
7d455152 | 13563 | TYPE_TAG_NAME (type) = name; |
c906108c | 13564 | |
0626fc76 TT |
13565 | attr = dwarf2_attr (die, DW_AT_type, cu); |
13566 | if (attr != NULL) | |
13567 | { | |
13568 | struct type *underlying_type = die_type (die, cu); | |
13569 | ||
13570 | TYPE_TARGET_TYPE (type) = underlying_type; | |
13571 | } | |
13572 | ||
e142c38c | 13573 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13574 | if (attr) |
13575 | { | |
13576 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13577 | } | |
13578 | else | |
13579 | { | |
13580 | TYPE_LENGTH (type) = 0; | |
13581 | } | |
13582 | ||
137033e9 JB |
13583 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
13584 | declared as private in the package spec, and then defined only | |
13585 | inside the package body. Such types are known as Taft Amendment | |
13586 | Types. When another package uses such a type, an incomplete DIE | |
13587 | may be generated by the compiler. */ | |
02eb380e | 13588 | if (die_is_declaration (die, cu)) |
876cecd0 | 13589 | TYPE_STUB (type) = 1; |
02eb380e | 13590 | |
0626fc76 TT |
13591 | /* Finish the creation of this type by using the enum's children. |
13592 | We must call this even when the underlying type has been provided | |
13593 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
13594 | update_enumeration_type_from_children (die, type, cu); |
13595 | ||
0626fc76 TT |
13596 | /* If this type has an underlying type that is not a stub, then we |
13597 | may use its attributes. We always use the "unsigned" attribute | |
13598 | in this situation, because ordinarily we guess whether the type | |
13599 | is unsigned -- but the guess can be wrong and the underlying type | |
13600 | can tell us the reality. However, we defer to a local size | |
13601 | attribute if one exists, because this lets the compiler override | |
13602 | the underlying type if needed. */ | |
13603 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
13604 | { | |
13605 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
13606 | if (TYPE_LENGTH (type) == 0) | |
13607 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
13608 | } | |
13609 | ||
3d567982 TT |
13610 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
13611 | ||
f792889a | 13612 | return set_die_type (die, type, cu); |
134d01f1 DJ |
13613 | } |
13614 | ||
13615 | /* Given a pointer to a die which begins an enumeration, process all | |
13616 | the dies that define the members of the enumeration, and create the | |
13617 | symbol for the enumeration type. | |
13618 | ||
13619 | NOTE: We reverse the order of the element list. */ | |
13620 | ||
13621 | static void | |
13622 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13623 | { | |
f792889a | 13624 | struct type *this_type; |
134d01f1 | 13625 | |
f792889a DJ |
13626 | this_type = get_die_type (die, cu); |
13627 | if (this_type == NULL) | |
13628 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 13629 | |
639d11d3 | 13630 | if (die->child != NULL) |
c906108c | 13631 | { |
9dc481d3 DE |
13632 | struct die_info *child_die; |
13633 | struct symbol *sym; | |
13634 | struct field *fields = NULL; | |
13635 | int num_fields = 0; | |
15d034d0 | 13636 | const char *name; |
9dc481d3 | 13637 | |
639d11d3 | 13638 | child_die = die->child; |
c906108c SS |
13639 | while (child_die && child_die->tag) |
13640 | { | |
13641 | if (child_die->tag != DW_TAG_enumerator) | |
13642 | { | |
e7c27a73 | 13643 | process_die (child_die, cu); |
c906108c SS |
13644 | } |
13645 | else | |
13646 | { | |
39cbfefa DJ |
13647 | name = dwarf2_name (child_die, cu); |
13648 | if (name) | |
c906108c | 13649 | { |
f792889a | 13650 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
13651 | |
13652 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13653 | { | |
13654 | fields = (struct field *) | |
13655 | xrealloc (fields, | |
13656 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13657 | * sizeof (struct field)); |
c906108c SS |
13658 | } |
13659 | ||
3567439c | 13660 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 13661 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 13662 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
13663 | FIELD_BITSIZE (fields[num_fields]) = 0; |
13664 | ||
13665 | num_fields++; | |
13666 | } | |
13667 | } | |
13668 | ||
13669 | child_die = sibling_die (child_die); | |
13670 | } | |
13671 | ||
13672 | if (num_fields) | |
13673 | { | |
f792889a DJ |
13674 | TYPE_NFIELDS (this_type) = num_fields; |
13675 | TYPE_FIELDS (this_type) = (struct field *) | |
13676 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
13677 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 13678 | sizeof (struct field) * num_fields); |
b8c9b27d | 13679 | xfree (fields); |
c906108c | 13680 | } |
c906108c | 13681 | } |
134d01f1 | 13682 | |
6c83ed52 TT |
13683 | /* If we are reading an enum from a .debug_types unit, and the enum |
13684 | is a declaration, and the enum is not the signatured type in the | |
13685 | unit, then we do not want to add a symbol for it. Adding a | |
13686 | symbol would in some cases obscure the true definition of the | |
13687 | enum, giving users an incomplete type when the definition is | |
13688 | actually available. Note that we do not want to do this for all | |
13689 | enums which are just declarations, because C++0x allows forward | |
13690 | enum declarations. */ | |
3019eac3 | 13691 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
13692 | && die_is_declaration (die, cu)) |
13693 | { | |
52dc124a | 13694 | struct signatured_type *sig_type; |
6c83ed52 | 13695 | |
c0f78cd4 | 13696 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
13697 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
13698 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
13699 | return; |
13700 | } | |
13701 | ||
f792889a | 13702 | new_symbol (die, this_type, cu); |
c906108c SS |
13703 | } |
13704 | ||
13705 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
13706 | the DIE's type field. For now, this only handles one dimensional | |
13707 | arrays. */ | |
13708 | ||
f792889a | 13709 | static struct type * |
e7c27a73 | 13710 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13711 | { |
e7c27a73 | 13712 | struct objfile *objfile = cu->objfile; |
c906108c | 13713 | struct die_info *child_die; |
7e314c57 | 13714 | struct type *type; |
c906108c SS |
13715 | struct type *element_type, *range_type, *index_type; |
13716 | struct type **range_types = NULL; | |
13717 | struct attribute *attr; | |
13718 | int ndim = 0; | |
13719 | struct cleanup *back_to; | |
15d034d0 | 13720 | const char *name; |
dc53a7ad | 13721 | unsigned int bit_stride = 0; |
c906108c | 13722 | |
e7c27a73 | 13723 | element_type = die_type (die, cu); |
c906108c | 13724 | |
7e314c57 JK |
13725 | /* The die_type call above may have already set the type for this DIE. */ |
13726 | type = get_die_type (die, cu); | |
13727 | if (type) | |
13728 | return type; | |
13729 | ||
dc53a7ad JB |
13730 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
13731 | if (attr != NULL) | |
13732 | bit_stride = DW_UNSND (attr) * 8; | |
13733 | ||
13734 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
13735 | if (attr != NULL) | |
13736 | bit_stride = DW_UNSND (attr); | |
13737 | ||
c906108c SS |
13738 | /* Irix 6.2 native cc creates array types without children for |
13739 | arrays with unspecified length. */ | |
639d11d3 | 13740 | if (die->child == NULL) |
c906108c | 13741 | { |
46bf5051 | 13742 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 13743 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
13744 | type = create_array_type_with_stride (NULL, element_type, range_type, |
13745 | bit_stride); | |
f792889a | 13746 | return set_die_type (die, type, cu); |
c906108c SS |
13747 | } |
13748 | ||
13749 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 13750 | child_die = die->child; |
c906108c SS |
13751 | while (child_die && child_die->tag) |
13752 | { | |
13753 | if (child_die->tag == DW_TAG_subrange_type) | |
13754 | { | |
f792889a | 13755 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 13756 | |
f792889a | 13757 | if (child_type != NULL) |
a02abb62 | 13758 | { |
0963b4bd MS |
13759 | /* The range type was succesfully read. Save it for the |
13760 | array type creation. */ | |
a02abb62 JB |
13761 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
13762 | { | |
13763 | range_types = (struct type **) | |
13764 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
13765 | * sizeof (struct type *)); | |
13766 | if (ndim == 0) | |
13767 | make_cleanup (free_current_contents, &range_types); | |
13768 | } | |
f792889a | 13769 | range_types[ndim++] = child_type; |
a02abb62 | 13770 | } |
c906108c SS |
13771 | } |
13772 | child_die = sibling_die (child_die); | |
13773 | } | |
13774 | ||
13775 | /* Dwarf2 dimensions are output from left to right, create the | |
13776 | necessary array types in backwards order. */ | |
7ca2d3a3 | 13777 | |
c906108c | 13778 | type = element_type; |
7ca2d3a3 DL |
13779 | |
13780 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
13781 | { | |
13782 | int i = 0; | |
9a619af0 | 13783 | |
7ca2d3a3 | 13784 | while (i < ndim) |
dc53a7ad JB |
13785 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
13786 | bit_stride); | |
7ca2d3a3 DL |
13787 | } |
13788 | else | |
13789 | { | |
13790 | while (ndim-- > 0) | |
dc53a7ad JB |
13791 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
13792 | bit_stride); | |
7ca2d3a3 | 13793 | } |
c906108c | 13794 | |
f5f8a009 EZ |
13795 | /* Understand Dwarf2 support for vector types (like they occur on |
13796 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
13797 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
13798 | custom vendor extension. The main difference between a regular | |
13799 | array and the vector variant is that vectors are passed by value | |
13800 | to functions. */ | |
e142c38c | 13801 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 13802 | if (attr) |
ea37ba09 | 13803 | make_vector_type (type); |
f5f8a009 | 13804 | |
dbc98a8b KW |
13805 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
13806 | implementation may choose to implement triple vectors using this | |
13807 | attribute. */ | |
13808 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
13809 | if (attr) | |
13810 | { | |
13811 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
13812 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13813 | else | |
3e43a32a MS |
13814 | complaint (&symfile_complaints, |
13815 | _("DW_AT_byte_size for array type smaller " | |
13816 | "than the total size of elements")); | |
dbc98a8b KW |
13817 | } |
13818 | ||
39cbfefa DJ |
13819 | name = dwarf2_name (die, cu); |
13820 | if (name) | |
13821 | TYPE_NAME (type) = name; | |
6e70227d | 13822 | |
0963b4bd | 13823 | /* Install the type in the die. */ |
7e314c57 JK |
13824 | set_die_type (die, type, cu); |
13825 | ||
13826 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13827 | set_descriptive_type (type, die, cu); |
13828 | ||
c906108c SS |
13829 | do_cleanups (back_to); |
13830 | ||
7e314c57 | 13831 | return type; |
c906108c SS |
13832 | } |
13833 | ||
7ca2d3a3 | 13834 | static enum dwarf_array_dim_ordering |
6e70227d | 13835 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
13836 | { |
13837 | struct attribute *attr; | |
13838 | ||
13839 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
13840 | ||
aead7601 SM |
13841 | if (attr) |
13842 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 13843 | |
0963b4bd MS |
13844 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
13845 | opposite order to the dwarf2 specification, but data is still | |
13846 | laid out as per normal fortran. | |
7ca2d3a3 | 13847 | |
0963b4bd MS |
13848 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
13849 | version checking. */ | |
7ca2d3a3 | 13850 | |
905e0470 PM |
13851 | if (cu->language == language_fortran |
13852 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
13853 | { |
13854 | return DW_ORD_row_major; | |
13855 | } | |
13856 | ||
6e70227d | 13857 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
13858 | { |
13859 | case array_column_major: | |
13860 | return DW_ORD_col_major; | |
13861 | case array_row_major: | |
13862 | default: | |
13863 | return DW_ORD_row_major; | |
13864 | }; | |
13865 | } | |
13866 | ||
72019c9c | 13867 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 13868 | the DIE's type field. */ |
72019c9c | 13869 | |
f792889a | 13870 | static struct type * |
72019c9c GM |
13871 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
13872 | { | |
7e314c57 JK |
13873 | struct type *domain_type, *set_type; |
13874 | struct attribute *attr; | |
f792889a | 13875 | |
7e314c57 JK |
13876 | domain_type = die_type (die, cu); |
13877 | ||
13878 | /* The die_type call above may have already set the type for this DIE. */ | |
13879 | set_type = get_die_type (die, cu); | |
13880 | if (set_type) | |
13881 | return set_type; | |
13882 | ||
13883 | set_type = create_set_type (NULL, domain_type); | |
13884 | ||
13885 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
13886 | if (attr) |
13887 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 13888 | |
f792889a | 13889 | return set_die_type (die, set_type, cu); |
72019c9c | 13890 | } |
7ca2d3a3 | 13891 | |
0971de02 TT |
13892 | /* A helper for read_common_block that creates a locexpr baton. |
13893 | SYM is the symbol which we are marking as computed. | |
13894 | COMMON_DIE is the DIE for the common block. | |
13895 | COMMON_LOC is the location expression attribute for the common | |
13896 | block itself. | |
13897 | MEMBER_LOC is the location expression attribute for the particular | |
13898 | member of the common block that we are processing. | |
13899 | CU is the CU from which the above come. */ | |
13900 | ||
13901 | static void | |
13902 | mark_common_block_symbol_computed (struct symbol *sym, | |
13903 | struct die_info *common_die, | |
13904 | struct attribute *common_loc, | |
13905 | struct attribute *member_loc, | |
13906 | struct dwarf2_cu *cu) | |
13907 | { | |
13908 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13909 | struct dwarf2_locexpr_baton *baton; | |
13910 | gdb_byte *ptr; | |
13911 | unsigned int cu_off; | |
13912 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
13913 | LONGEST offset = 0; | |
13914 | ||
13915 | gdb_assert (common_loc && member_loc); | |
13916 | gdb_assert (attr_form_is_block (common_loc)); | |
13917 | gdb_assert (attr_form_is_block (member_loc) | |
13918 | || attr_form_is_constant (member_loc)); | |
13919 | ||
8d749320 | 13920 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
13921 | baton->per_cu = cu->per_cu; |
13922 | gdb_assert (baton->per_cu); | |
13923 | ||
13924 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
13925 | ||
13926 | if (attr_form_is_constant (member_loc)) | |
13927 | { | |
13928 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
13929 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
13930 | } | |
13931 | else | |
13932 | baton->size += DW_BLOCK (member_loc)->size; | |
13933 | ||
224c3ddb | 13934 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
13935 | baton->data = ptr; |
13936 | ||
13937 | *ptr++ = DW_OP_call4; | |
13938 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
13939 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
13940 | ptr += 4; | |
13941 | ||
13942 | if (attr_form_is_constant (member_loc)) | |
13943 | { | |
13944 | *ptr++ = DW_OP_addr; | |
13945 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
13946 | ptr += cu->header.addr_size; | |
13947 | } | |
13948 | else | |
13949 | { | |
13950 | /* We have to copy the data here, because DW_OP_call4 will only | |
13951 | use a DW_AT_location attribute. */ | |
13952 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
13953 | ptr += DW_BLOCK (member_loc)->size; | |
13954 | } | |
13955 | ||
13956 | *ptr++ = DW_OP_plus; | |
13957 | gdb_assert (ptr - baton->data == baton->size); | |
13958 | ||
0971de02 | 13959 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 13960 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
13961 | } |
13962 | ||
4357ac6c TT |
13963 | /* Create appropriate locally-scoped variables for all the |
13964 | DW_TAG_common_block entries. Also create a struct common_block | |
13965 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
13966 | is used to sepate the common blocks name namespace from regular | |
13967 | variable names. */ | |
c906108c SS |
13968 | |
13969 | static void | |
e7c27a73 | 13970 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13971 | { |
0971de02 TT |
13972 | struct attribute *attr; |
13973 | ||
13974 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
13975 | if (attr) | |
13976 | { | |
13977 | /* Support the .debug_loc offsets. */ | |
13978 | if (attr_form_is_block (attr)) | |
13979 | { | |
13980 | /* Ok. */ | |
13981 | } | |
13982 | else if (attr_form_is_section_offset (attr)) | |
13983 | { | |
13984 | dwarf2_complex_location_expr_complaint (); | |
13985 | attr = NULL; | |
13986 | } | |
13987 | else | |
13988 | { | |
13989 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
13990 | "common block member"); | |
13991 | attr = NULL; | |
13992 | } | |
13993 | } | |
13994 | ||
639d11d3 | 13995 | if (die->child != NULL) |
c906108c | 13996 | { |
4357ac6c TT |
13997 | struct objfile *objfile = cu->objfile; |
13998 | struct die_info *child_die; | |
13999 | size_t n_entries = 0, size; | |
14000 | struct common_block *common_block; | |
14001 | struct symbol *sym; | |
74ac6d43 | 14002 | |
4357ac6c TT |
14003 | for (child_die = die->child; |
14004 | child_die && child_die->tag; | |
14005 | child_die = sibling_die (child_die)) | |
14006 | ++n_entries; | |
14007 | ||
14008 | size = (sizeof (struct common_block) | |
14009 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
14010 | common_block |
14011 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
14012 | size); | |
4357ac6c TT |
14013 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
14014 | common_block->n_entries = 0; | |
14015 | ||
14016 | for (child_die = die->child; | |
14017 | child_die && child_die->tag; | |
14018 | child_die = sibling_die (child_die)) | |
14019 | { | |
14020 | /* Create the symbol in the DW_TAG_common_block block in the current | |
14021 | symbol scope. */ | |
e7c27a73 | 14022 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
14023 | if (sym != NULL) |
14024 | { | |
14025 | struct attribute *member_loc; | |
14026 | ||
14027 | common_block->contents[common_block->n_entries++] = sym; | |
14028 | ||
14029 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
14030 | cu); | |
14031 | if (member_loc) | |
14032 | { | |
14033 | /* GDB has handled this for a long time, but it is | |
14034 | not specified by DWARF. It seems to have been | |
14035 | emitted by gfortran at least as recently as: | |
14036 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
14037 | complaint (&symfile_complaints, | |
14038 | _("Variable in common block has " | |
14039 | "DW_AT_data_member_location " | |
14040 | "- DIE at 0x%x [in module %s]"), | |
4262abfb JK |
14041 | child_die->offset.sect_off, |
14042 | objfile_name (cu->objfile)); | |
0971de02 TT |
14043 | |
14044 | if (attr_form_is_section_offset (member_loc)) | |
14045 | dwarf2_complex_location_expr_complaint (); | |
14046 | else if (attr_form_is_constant (member_loc) | |
14047 | || attr_form_is_block (member_loc)) | |
14048 | { | |
14049 | if (attr) | |
14050 | mark_common_block_symbol_computed (sym, die, attr, | |
14051 | member_loc, cu); | |
14052 | } | |
14053 | else | |
14054 | dwarf2_complex_location_expr_complaint (); | |
14055 | } | |
14056 | } | |
c906108c | 14057 | } |
4357ac6c TT |
14058 | |
14059 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
14060 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
14061 | } |
14062 | } | |
14063 | ||
0114d602 | 14064 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 14065 | |
0114d602 DJ |
14066 | static struct type * |
14067 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 14068 | { |
e7c27a73 | 14069 | struct objfile *objfile = cu->objfile; |
0114d602 | 14070 | const char *previous_prefix, *name; |
9219021c | 14071 | int is_anonymous; |
0114d602 DJ |
14072 | struct type *type; |
14073 | ||
14074 | /* For extensions, reuse the type of the original namespace. */ | |
14075 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
14076 | { | |
14077 | struct die_info *ext_die; | |
14078 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 14079 | |
0114d602 DJ |
14080 | ext_die = dwarf2_extension (die, &ext_cu); |
14081 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
14082 | |
14083 | /* EXT_CU may not be the same as CU. | |
02142a6c | 14084 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
14085 | return set_die_type (die, type, cu); |
14086 | } | |
9219021c | 14087 | |
e142c38c | 14088 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
14089 | |
14090 | /* Now build the name of the current namespace. */ | |
14091 | ||
0114d602 DJ |
14092 | previous_prefix = determine_prefix (die, cu); |
14093 | if (previous_prefix[0] != '\0') | |
14094 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 14095 | previous_prefix, name, 0, cu); |
0114d602 DJ |
14096 | |
14097 | /* Create the type. */ | |
14098 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
14099 | objfile); | |
abee88f2 | 14100 | TYPE_NAME (type) = name; |
0114d602 DJ |
14101 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
14102 | ||
60531b24 | 14103 | return set_die_type (die, type, cu); |
0114d602 DJ |
14104 | } |
14105 | ||
22cee43f | 14106 | /* Read a namespace scope. */ |
0114d602 DJ |
14107 | |
14108 | static void | |
14109 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
14110 | { | |
14111 | struct objfile *objfile = cu->objfile; | |
0114d602 | 14112 | int is_anonymous; |
9219021c | 14113 | |
5c4e30ca DC |
14114 | /* Add a symbol associated to this if we haven't seen the namespace |
14115 | before. Also, add a using directive if it's an anonymous | |
14116 | namespace. */ | |
9219021c | 14117 | |
f2f0e013 | 14118 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
14119 | { |
14120 | struct type *type; | |
14121 | ||
0114d602 | 14122 | type = read_type_die (die, cu); |
e7c27a73 | 14123 | new_symbol (die, type, cu); |
5c4e30ca | 14124 | |
e8e80198 | 14125 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 14126 | if (is_anonymous) |
0114d602 DJ |
14127 | { |
14128 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 14129 | |
22cee43f PMR |
14130 | add_using_directive (using_directives (cu->language), |
14131 | previous_prefix, TYPE_NAME (type), NULL, | |
14132 | NULL, NULL, 0, &objfile->objfile_obstack); | |
0114d602 | 14133 | } |
5c4e30ca | 14134 | } |
9219021c | 14135 | |
639d11d3 | 14136 | if (die->child != NULL) |
d9fa45fe | 14137 | { |
639d11d3 | 14138 | struct die_info *child_die = die->child; |
6e70227d | 14139 | |
d9fa45fe DC |
14140 | while (child_die && child_die->tag) |
14141 | { | |
e7c27a73 | 14142 | process_die (child_die, cu); |
d9fa45fe DC |
14143 | child_die = sibling_die (child_die); |
14144 | } | |
14145 | } | |
38d518c9 EZ |
14146 | } |
14147 | ||
f55ee35c JK |
14148 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
14149 | imported module. Still we need that type as local Fortran "use ... only" | |
14150 | declaration imports depend on the created type in determine_prefix. */ | |
14151 | ||
14152 | static struct type * | |
14153 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
14154 | { | |
14155 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 14156 | const char *module_name; |
f55ee35c JK |
14157 | struct type *type; |
14158 | ||
14159 | module_name = dwarf2_name (die, cu); | |
14160 | if (!module_name) | |
3e43a32a MS |
14161 | complaint (&symfile_complaints, |
14162 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 14163 | die->offset.sect_off); |
f55ee35c JK |
14164 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
14165 | ||
14166 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
14167 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
14168 | ||
14169 | return set_die_type (die, type, cu); | |
14170 | } | |
14171 | ||
5d7cb8df JK |
14172 | /* Read a Fortran module. */ |
14173 | ||
14174 | static void | |
14175 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
14176 | { | |
14177 | struct die_info *child_die = die->child; | |
530e8392 KB |
14178 | struct type *type; |
14179 | ||
14180 | type = read_type_die (die, cu); | |
14181 | new_symbol (die, type, cu); | |
5d7cb8df | 14182 | |
5d7cb8df JK |
14183 | while (child_die && child_die->tag) |
14184 | { | |
14185 | process_die (child_die, cu); | |
14186 | child_die = sibling_die (child_die); | |
14187 | } | |
14188 | } | |
14189 | ||
38d518c9 EZ |
14190 | /* Return the name of the namespace represented by DIE. Set |
14191 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
14192 | namespace. */ | |
14193 | ||
14194 | static const char * | |
e142c38c | 14195 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
14196 | { |
14197 | struct die_info *current_die; | |
14198 | const char *name = NULL; | |
14199 | ||
14200 | /* Loop through the extensions until we find a name. */ | |
14201 | ||
14202 | for (current_die = die; | |
14203 | current_die != NULL; | |
f2f0e013 | 14204 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 14205 | { |
96553a0c DE |
14206 | /* We don't use dwarf2_name here so that we can detect the absence |
14207 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 14208 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 14209 | |
38d518c9 EZ |
14210 | if (name != NULL) |
14211 | break; | |
14212 | } | |
14213 | ||
14214 | /* Is it an anonymous namespace? */ | |
14215 | ||
14216 | *is_anonymous = (name == NULL); | |
14217 | if (*is_anonymous) | |
2b1dbab0 | 14218 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
14219 | |
14220 | return name; | |
d9fa45fe DC |
14221 | } |
14222 | ||
c906108c SS |
14223 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
14224 | the user defined type vector. */ | |
14225 | ||
f792889a | 14226 | static struct type * |
e7c27a73 | 14227 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14228 | { |
5e2b427d | 14229 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 14230 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 14231 | struct type *type; |
8b2dbe47 KB |
14232 | struct attribute *attr_byte_size; |
14233 | struct attribute *attr_address_class; | |
14234 | int byte_size, addr_class; | |
7e314c57 JK |
14235 | struct type *target_type; |
14236 | ||
14237 | target_type = die_type (die, cu); | |
c906108c | 14238 | |
7e314c57 JK |
14239 | /* The die_type call above may have already set the type for this DIE. */ |
14240 | type = get_die_type (die, cu); | |
14241 | if (type) | |
14242 | return type; | |
14243 | ||
14244 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 14245 | |
e142c38c | 14246 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
14247 | if (attr_byte_size) |
14248 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 14249 | else |
8b2dbe47 KB |
14250 | byte_size = cu_header->addr_size; |
14251 | ||
e142c38c | 14252 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14253 | if (attr_address_class) |
14254 | addr_class = DW_UNSND (attr_address_class); | |
14255 | else | |
14256 | addr_class = DW_ADDR_none; | |
14257 | ||
14258 | /* If the pointer size or address class is different than the | |
14259 | default, create a type variant marked as such and set the | |
14260 | length accordingly. */ | |
14261 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14262 | { |
5e2b427d | 14263 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14264 | { |
14265 | int type_flags; | |
14266 | ||
849957d9 | 14267 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14268 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14269 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14270 | == 0); | |
8b2dbe47 KB |
14271 | type = make_type_with_address_space (type, type_flags); |
14272 | } | |
14273 | else if (TYPE_LENGTH (type) != byte_size) | |
14274 | { | |
3e43a32a MS |
14275 | complaint (&symfile_complaints, |
14276 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14277 | } |
6e70227d | 14278 | else |
9a619af0 MS |
14279 | { |
14280 | /* Should we also complain about unhandled address classes? */ | |
14281 | } | |
c906108c | 14282 | } |
8b2dbe47 KB |
14283 | |
14284 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14285 | return set_die_type (die, type, cu); |
c906108c SS |
14286 | } |
14287 | ||
14288 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14289 | the user defined type vector. */ | |
14290 | ||
f792889a | 14291 | static struct type * |
e7c27a73 | 14292 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14293 | { |
14294 | struct type *type; | |
14295 | struct type *to_type; | |
14296 | struct type *domain; | |
14297 | ||
e7c27a73 DJ |
14298 | to_type = die_type (die, cu); |
14299 | domain = die_containing_type (die, cu); | |
0d5de010 | 14300 | |
7e314c57 JK |
14301 | /* The calls above may have already set the type for this DIE. */ |
14302 | type = get_die_type (die, cu); | |
14303 | if (type) | |
14304 | return type; | |
14305 | ||
0d5de010 DJ |
14306 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14307 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14308 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14309 | { | |
14310 | struct type *new_type = alloc_type (cu->objfile); | |
14311 | ||
14312 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14313 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14314 | TYPE_VARARGS (to_type)); | |
14315 | type = lookup_methodptr_type (new_type); | |
14316 | } | |
0d5de010 DJ |
14317 | else |
14318 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14319 | |
f792889a | 14320 | return set_die_type (die, type, cu); |
c906108c SS |
14321 | } |
14322 | ||
14323 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
14324 | the user defined type vector. */ | |
14325 | ||
f792889a | 14326 | static struct type * |
e7c27a73 | 14327 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14328 | { |
e7c27a73 | 14329 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14330 | struct type *type, *target_type; |
c906108c SS |
14331 | struct attribute *attr; |
14332 | ||
7e314c57 JK |
14333 | target_type = die_type (die, cu); |
14334 | ||
14335 | /* The die_type call above may have already set the type for this DIE. */ | |
14336 | type = get_die_type (die, cu); | |
14337 | if (type) | |
14338 | return type; | |
14339 | ||
14340 | type = lookup_reference_type (target_type); | |
e142c38c | 14341 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14342 | if (attr) |
14343 | { | |
14344 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14345 | } | |
14346 | else | |
14347 | { | |
107d2387 | 14348 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14349 | } |
f792889a | 14350 | return set_die_type (die, type, cu); |
c906108c SS |
14351 | } |
14352 | ||
cf363f18 MW |
14353 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14354 | outputs DWARF type qualifiers that apply to an array, not the | |
14355 | element type. But GDB relies on the array element type to carry | |
14356 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14357 | specification. */ | |
14358 | ||
14359 | static struct type * | |
14360 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14361 | struct type *base_type, int cnst, int voltl) | |
14362 | { | |
14363 | struct type *el_type, *inner_array; | |
14364 | ||
14365 | base_type = copy_type (base_type); | |
14366 | inner_array = base_type; | |
14367 | ||
14368 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14369 | { | |
14370 | TYPE_TARGET_TYPE (inner_array) = | |
14371 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14372 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14373 | } | |
14374 | ||
14375 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14376 | cnst |= TYPE_CONST (el_type); | |
14377 | voltl |= TYPE_VOLATILE (el_type); | |
14378 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14379 | ||
14380 | return set_die_type (die, base_type, cu); | |
14381 | } | |
14382 | ||
f792889a | 14383 | static struct type * |
e7c27a73 | 14384 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14385 | { |
f792889a | 14386 | struct type *base_type, *cv_type; |
c906108c | 14387 | |
e7c27a73 | 14388 | base_type = die_type (die, cu); |
7e314c57 JK |
14389 | |
14390 | /* The die_type call above may have already set the type for this DIE. */ | |
14391 | cv_type = get_die_type (die, cu); | |
14392 | if (cv_type) | |
14393 | return cv_type; | |
14394 | ||
2f608a3a KW |
14395 | /* In case the const qualifier is applied to an array type, the element type |
14396 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14397 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14398 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14399 | |
f792889a DJ |
14400 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14401 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14402 | } |
14403 | ||
f792889a | 14404 | static struct type * |
e7c27a73 | 14405 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14406 | { |
f792889a | 14407 | struct type *base_type, *cv_type; |
c906108c | 14408 | |
e7c27a73 | 14409 | base_type = die_type (die, cu); |
7e314c57 JK |
14410 | |
14411 | /* The die_type call above may have already set the type for this DIE. */ | |
14412 | cv_type = get_die_type (die, cu); | |
14413 | if (cv_type) | |
14414 | return cv_type; | |
14415 | ||
cf363f18 MW |
14416 | /* In case the volatile qualifier is applied to an array type, the |
14417 | element type is so qualified, not the array type (section 6.7.3 | |
14418 | of C99). */ | |
14419 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14420 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14421 | ||
f792889a DJ |
14422 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14423 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14424 | } |
14425 | ||
06d66ee9 TT |
14426 | /* Handle DW_TAG_restrict_type. */ |
14427 | ||
14428 | static struct type * | |
14429 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14430 | { | |
14431 | struct type *base_type, *cv_type; | |
14432 | ||
14433 | base_type = die_type (die, cu); | |
14434 | ||
14435 | /* The die_type call above may have already set the type for this DIE. */ | |
14436 | cv_type = get_die_type (die, cu); | |
14437 | if (cv_type) | |
14438 | return cv_type; | |
14439 | ||
14440 | cv_type = make_restrict_type (base_type); | |
14441 | return set_die_type (die, cv_type, cu); | |
14442 | } | |
14443 | ||
a2c2acaf MW |
14444 | /* Handle DW_TAG_atomic_type. */ |
14445 | ||
14446 | static struct type * | |
14447 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
14448 | { | |
14449 | struct type *base_type, *cv_type; | |
14450 | ||
14451 | base_type = die_type (die, cu); | |
14452 | ||
14453 | /* The die_type call above may have already set the type for this DIE. */ | |
14454 | cv_type = get_die_type (die, cu); | |
14455 | if (cv_type) | |
14456 | return cv_type; | |
14457 | ||
14458 | cv_type = make_atomic_type (base_type); | |
14459 | return set_die_type (die, cv_type, cu); | |
14460 | } | |
14461 | ||
c906108c SS |
14462 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14463 | the user defined type vector. It isn't really a user defined type, | |
14464 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14465 | attribute to reference it. */ | |
14466 | ||
f792889a | 14467 | static struct type * |
e7c27a73 | 14468 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14469 | { |
e7c27a73 | 14470 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14471 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14472 | struct type *type, *range_type, *index_type, *char_type; |
14473 | struct attribute *attr; | |
14474 | unsigned int length; | |
14475 | ||
e142c38c | 14476 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14477 | if (attr) |
14478 | { | |
14479 | length = DW_UNSND (attr); | |
14480 | } | |
14481 | else | |
14482 | { | |
0963b4bd | 14483 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14484 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14485 | if (attr) |
14486 | { | |
14487 | length = DW_UNSND (attr); | |
14488 | } | |
14489 | else | |
14490 | { | |
14491 | length = 1; | |
14492 | } | |
c906108c | 14493 | } |
6ccb9162 | 14494 | |
46bf5051 | 14495 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14496 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14497 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14498 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14499 | |
f792889a | 14500 | return set_die_type (die, type, cu); |
c906108c SS |
14501 | } |
14502 | ||
4d804846 JB |
14503 | /* Assuming that DIE corresponds to a function, returns nonzero |
14504 | if the function is prototyped. */ | |
14505 | ||
14506 | static int | |
14507 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14508 | { | |
14509 | struct attribute *attr; | |
14510 | ||
14511 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14512 | if (attr && (DW_UNSND (attr) != 0)) | |
14513 | return 1; | |
14514 | ||
14515 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14516 | is only meaninful for C, but the concept also extends to other | |
14517 | languages that allow unprototyped functions (Eg: Objective C). | |
14518 | For all other languages, assume that functions are always | |
14519 | prototyped. */ | |
14520 | if (cu->language != language_c | |
14521 | && cu->language != language_objc | |
14522 | && cu->language != language_opencl) | |
14523 | return 1; | |
14524 | ||
14525 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14526 | prototyped and unprototyped functions; default to prototyped, | |
14527 | since that is more common in modern code (and RealView warns | |
14528 | about unprototyped functions). */ | |
14529 | if (producer_is_realview (cu->producer)) | |
14530 | return 1; | |
14531 | ||
14532 | return 0; | |
14533 | } | |
14534 | ||
c906108c SS |
14535 | /* Handle DIES due to C code like: |
14536 | ||
14537 | struct foo | |
c5aa993b JM |
14538 | { |
14539 | int (*funcp)(int a, long l); | |
14540 | int b; | |
14541 | }; | |
c906108c | 14542 | |
0963b4bd | 14543 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14544 | |
f792889a | 14545 | static struct type * |
e7c27a73 | 14546 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14547 | { |
bb5ed363 | 14548 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14549 | struct type *type; /* Type that this function returns. */ |
14550 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14551 | struct attribute *attr; |
14552 | ||
e7c27a73 | 14553 | type = die_type (die, cu); |
7e314c57 JK |
14554 | |
14555 | /* The die_type call above may have already set the type for this DIE. */ | |
14556 | ftype = get_die_type (die, cu); | |
14557 | if (ftype) | |
14558 | return ftype; | |
14559 | ||
0c8b41f1 | 14560 | ftype = lookup_function_type (type); |
c906108c | 14561 | |
4d804846 | 14562 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 14563 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 14564 | |
c055b101 CV |
14565 | /* Store the calling convention in the type if it's available in |
14566 | the subroutine die. Otherwise set the calling convention to | |
14567 | the default value DW_CC_normal. */ | |
14568 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
14569 | if (attr) |
14570 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
14571 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
14572 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
14573 | else | |
14574 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 14575 | |
743649fd MW |
14576 | /* Record whether the function returns normally to its caller or not |
14577 | if the DWARF producer set that information. */ | |
14578 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
14579 | if (attr && (DW_UNSND (attr) != 0)) | |
14580 | TYPE_NO_RETURN (ftype) = 1; | |
14581 | ||
76c10ea2 GM |
14582 | /* We need to add the subroutine type to the die immediately so |
14583 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 14584 | declared as the same subroutine type. */ |
76c10ea2 | 14585 | set_die_type (die, ftype, cu); |
6e70227d | 14586 | |
639d11d3 | 14587 | if (die->child != NULL) |
c906108c | 14588 | { |
bb5ed363 | 14589 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 14590 | struct die_info *child_die; |
8072405b | 14591 | int nparams, iparams; |
c906108c SS |
14592 | |
14593 | /* Count the number of parameters. | |
14594 | FIXME: GDB currently ignores vararg functions, but knows about | |
14595 | vararg member functions. */ | |
8072405b | 14596 | nparams = 0; |
639d11d3 | 14597 | child_die = die->child; |
c906108c SS |
14598 | while (child_die && child_die->tag) |
14599 | { | |
14600 | if (child_die->tag == DW_TAG_formal_parameter) | |
14601 | nparams++; | |
14602 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 14603 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
14604 | child_die = sibling_die (child_die); |
14605 | } | |
14606 | ||
14607 | /* Allocate storage for parameters and fill them in. */ | |
14608 | TYPE_NFIELDS (ftype) = nparams; | |
14609 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 14610 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 14611 | |
8072405b JK |
14612 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
14613 | even if we error out during the parameters reading below. */ | |
14614 | for (iparams = 0; iparams < nparams; iparams++) | |
14615 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
14616 | ||
14617 | iparams = 0; | |
639d11d3 | 14618 | child_die = die->child; |
c906108c SS |
14619 | while (child_die && child_die->tag) |
14620 | { | |
14621 | if (child_die->tag == DW_TAG_formal_parameter) | |
14622 | { | |
3ce3b1ba PA |
14623 | struct type *arg_type; |
14624 | ||
14625 | /* DWARF version 2 has no clean way to discern C++ | |
14626 | static and non-static member functions. G++ helps | |
14627 | GDB by marking the first parameter for non-static | |
14628 | member functions (which is the this pointer) as | |
14629 | artificial. We pass this information to | |
14630 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
14631 | ||
14632 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
14633 | 4.5 does not yet generate. */ | |
e142c38c | 14634 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
14635 | if (attr) |
14636 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
14637 | else | |
418835cc KS |
14638 | { |
14639 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
14640 | ||
14641 | /* GCC/43521: In java, the formal parameter | |
14642 | "this" is sometimes not marked with DW_AT_artificial. */ | |
14643 | if (cu->language == language_java) | |
14644 | { | |
14645 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 14646 | |
418835cc KS |
14647 | if (name && !strcmp (name, "this")) |
14648 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
14649 | } | |
14650 | } | |
3ce3b1ba PA |
14651 | arg_type = die_type (child_die, cu); |
14652 | ||
14653 | /* RealView does not mark THIS as const, which the testsuite | |
14654 | expects. GCC marks THIS as const in method definitions, | |
14655 | but not in the class specifications (GCC PR 43053). */ | |
14656 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
14657 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
14658 | { | |
14659 | int is_this = 0; | |
14660 | struct dwarf2_cu *arg_cu = cu; | |
14661 | const char *name = dwarf2_name (child_die, cu); | |
14662 | ||
14663 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
14664 | if (attr) | |
14665 | { | |
14666 | /* If the compiler emits this, use it. */ | |
14667 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
14668 | is_this = 1; | |
14669 | } | |
14670 | else if (name && strcmp (name, "this") == 0) | |
14671 | /* Function definitions will have the argument names. */ | |
14672 | is_this = 1; | |
14673 | else if (name == NULL && iparams == 0) | |
14674 | /* Declarations may not have the names, so like | |
14675 | elsewhere in GDB, assume an artificial first | |
14676 | argument is "this". */ | |
14677 | is_this = 1; | |
14678 | ||
14679 | if (is_this) | |
14680 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
14681 | arg_type, 0); | |
14682 | } | |
14683 | ||
14684 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
14685 | iparams++; |
14686 | } | |
14687 | child_die = sibling_die (child_die); | |
14688 | } | |
14689 | } | |
14690 | ||
76c10ea2 | 14691 | return ftype; |
c906108c SS |
14692 | } |
14693 | ||
f792889a | 14694 | static struct type * |
e7c27a73 | 14695 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14696 | { |
e7c27a73 | 14697 | struct objfile *objfile = cu->objfile; |
0114d602 | 14698 | const char *name = NULL; |
3c8e0968 | 14699 | struct type *this_type, *target_type; |
c906108c | 14700 | |
94af9270 | 14701 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 14702 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 14703 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 14704 | TYPE_NAME (this_type) = name; |
f792889a | 14705 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
14706 | target_type = die_type (die, cu); |
14707 | if (target_type != this_type) | |
14708 | TYPE_TARGET_TYPE (this_type) = target_type; | |
14709 | else | |
14710 | { | |
14711 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
14712 | spec and cause infinite loops in GDB. */ | |
14713 | complaint (&symfile_complaints, | |
14714 | _("Self-referential DW_TAG_typedef " | |
14715 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14716 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
14717 | TYPE_TARGET_TYPE (this_type) = NULL; |
14718 | } | |
f792889a | 14719 | return this_type; |
c906108c SS |
14720 | } |
14721 | ||
14722 | /* Find a representation of a given base type and install | |
14723 | it in the TYPE field of the die. */ | |
14724 | ||
f792889a | 14725 | static struct type * |
e7c27a73 | 14726 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14727 | { |
e7c27a73 | 14728 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14729 | struct type *type; |
14730 | struct attribute *attr; | |
14731 | int encoding = 0, size = 0; | |
15d034d0 | 14732 | const char *name; |
6ccb9162 UW |
14733 | enum type_code code = TYPE_CODE_INT; |
14734 | int type_flags = 0; | |
14735 | struct type *target_type = NULL; | |
c906108c | 14736 | |
e142c38c | 14737 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
14738 | if (attr) |
14739 | { | |
14740 | encoding = DW_UNSND (attr); | |
14741 | } | |
e142c38c | 14742 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14743 | if (attr) |
14744 | { | |
14745 | size = DW_UNSND (attr); | |
14746 | } | |
39cbfefa | 14747 | name = dwarf2_name (die, cu); |
6ccb9162 | 14748 | if (!name) |
c906108c | 14749 | { |
6ccb9162 UW |
14750 | complaint (&symfile_complaints, |
14751 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 14752 | } |
6ccb9162 UW |
14753 | |
14754 | switch (encoding) | |
c906108c | 14755 | { |
6ccb9162 UW |
14756 | case DW_ATE_address: |
14757 | /* Turn DW_ATE_address into a void * pointer. */ | |
14758 | code = TYPE_CODE_PTR; | |
14759 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14760 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
14761 | break; | |
14762 | case DW_ATE_boolean: | |
14763 | code = TYPE_CODE_BOOL; | |
14764 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14765 | break; | |
14766 | case DW_ATE_complex_float: | |
14767 | code = TYPE_CODE_COMPLEX; | |
14768 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
14769 | break; | |
14770 | case DW_ATE_decimal_float: | |
14771 | code = TYPE_CODE_DECFLOAT; | |
14772 | break; | |
14773 | case DW_ATE_float: | |
14774 | code = TYPE_CODE_FLT; | |
14775 | break; | |
14776 | case DW_ATE_signed: | |
14777 | break; | |
14778 | case DW_ATE_unsigned: | |
14779 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
14780 | if (cu->language == language_fortran |
14781 | && name | |
61012eef | 14782 | && startswith (name, "character(")) |
3b2b8fea | 14783 | code = TYPE_CODE_CHAR; |
6ccb9162 UW |
14784 | break; |
14785 | case DW_ATE_signed_char: | |
6e70227d | 14786 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14787 | || cu->language == language_pascal |
14788 | || cu->language == language_fortran) | |
6ccb9162 UW |
14789 | code = TYPE_CODE_CHAR; |
14790 | break; | |
14791 | case DW_ATE_unsigned_char: | |
868a0084 | 14792 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14793 | || cu->language == language_pascal |
14794 | || cu->language == language_fortran) | |
6ccb9162 UW |
14795 | code = TYPE_CODE_CHAR; |
14796 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14797 | break; | |
75079b2b TT |
14798 | case DW_ATE_UTF: |
14799 | /* We just treat this as an integer and then recognize the | |
14800 | type by name elsewhere. */ | |
14801 | break; | |
14802 | ||
6ccb9162 UW |
14803 | default: |
14804 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
14805 | dwarf_type_encoding_name (encoding)); | |
14806 | break; | |
c906108c | 14807 | } |
6ccb9162 | 14808 | |
0114d602 DJ |
14809 | type = init_type (code, size, type_flags, NULL, objfile); |
14810 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
14811 | TYPE_TARGET_TYPE (type) = target_type; |
14812 | ||
0114d602 | 14813 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 14814 | TYPE_NOSIGN (type) = 1; |
0114d602 | 14815 | |
f792889a | 14816 | return set_die_type (die, type, cu); |
c906108c SS |
14817 | } |
14818 | ||
80180f79 SA |
14819 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
14820 | resulting value of the attribute into struct bound_prop. | |
14821 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
14822 | ||
14823 | static int | |
14824 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
14825 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
14826 | { | |
14827 | struct dwarf2_property_baton *baton; | |
14828 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
14829 | ||
14830 | if (attr == NULL || prop == NULL) | |
14831 | return 0; | |
14832 | ||
14833 | if (attr_form_is_block (attr)) | |
14834 | { | |
8d749320 | 14835 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
14836 | baton->referenced_type = NULL; |
14837 | baton->locexpr.per_cu = cu->per_cu; | |
14838 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
14839 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
14840 | prop->data.baton = baton; | |
14841 | prop->kind = PROP_LOCEXPR; | |
14842 | gdb_assert (prop->data.baton != NULL); | |
14843 | } | |
14844 | else if (attr_form_is_ref (attr)) | |
14845 | { | |
14846 | struct dwarf2_cu *target_cu = cu; | |
14847 | struct die_info *target_die; | |
14848 | struct attribute *target_attr; | |
14849 | ||
14850 | target_die = follow_die_ref (die, attr, &target_cu); | |
14851 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
14852 | if (target_attr == NULL) |
14853 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
14854 | target_cu); | |
80180f79 SA |
14855 | if (target_attr == NULL) |
14856 | return 0; | |
14857 | ||
df25ebbd | 14858 | switch (target_attr->name) |
80180f79 | 14859 | { |
df25ebbd JB |
14860 | case DW_AT_location: |
14861 | if (attr_form_is_section_offset (target_attr)) | |
14862 | { | |
8d749320 | 14863 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
14864 | baton->referenced_type = die_type (target_die, target_cu); |
14865 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
14866 | prop->data.baton = baton; | |
14867 | prop->kind = PROP_LOCLIST; | |
14868 | gdb_assert (prop->data.baton != NULL); | |
14869 | } | |
14870 | else if (attr_form_is_block (target_attr)) | |
14871 | { | |
8d749320 | 14872 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
14873 | baton->referenced_type = die_type (target_die, target_cu); |
14874 | baton->locexpr.per_cu = cu->per_cu; | |
14875 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
14876 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
14877 | prop->data.baton = baton; | |
14878 | prop->kind = PROP_LOCEXPR; | |
14879 | gdb_assert (prop->data.baton != NULL); | |
14880 | } | |
14881 | else | |
14882 | { | |
14883 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14884 | "dynamic property"); | |
14885 | return 0; | |
14886 | } | |
14887 | break; | |
14888 | case DW_AT_data_member_location: | |
14889 | { | |
14890 | LONGEST offset; | |
14891 | ||
14892 | if (!handle_data_member_location (target_die, target_cu, | |
14893 | &offset)) | |
14894 | return 0; | |
14895 | ||
8d749320 | 14896 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
14897 | baton->referenced_type = read_type_die (target_die->parent, |
14898 | target_cu); | |
df25ebbd JB |
14899 | baton->offset_info.offset = offset; |
14900 | baton->offset_info.type = die_type (target_die, target_cu); | |
14901 | prop->data.baton = baton; | |
14902 | prop->kind = PROP_ADDR_OFFSET; | |
14903 | break; | |
14904 | } | |
80180f79 SA |
14905 | } |
14906 | } | |
14907 | else if (attr_form_is_constant (attr)) | |
14908 | { | |
14909 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
14910 | prop->kind = PROP_CONST; | |
14911 | } | |
14912 | else | |
14913 | { | |
14914 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
14915 | dwarf2_name (die, cu)); | |
14916 | return 0; | |
14917 | } | |
14918 | ||
14919 | return 1; | |
14920 | } | |
14921 | ||
a02abb62 JB |
14922 | /* Read the given DW_AT_subrange DIE. */ |
14923 | ||
f792889a | 14924 | static struct type * |
a02abb62 JB |
14925 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
14926 | { | |
4c9ad8c2 | 14927 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
14928 | struct type *range_type; |
14929 | struct attribute *attr; | |
729efb13 | 14930 | struct dynamic_prop low, high; |
4fae6e18 | 14931 | int low_default_is_valid; |
c451ebe5 | 14932 | int high_bound_is_count = 0; |
15d034d0 | 14933 | const char *name; |
43bbcdc2 | 14934 | LONGEST negative_mask; |
e77813c8 | 14935 | |
4c9ad8c2 TT |
14936 | orig_base_type = die_type (die, cu); |
14937 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
14938 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
14939 | creating the range type, but we use the result of check_typedef | |
14940 | when examining properties of the type. */ | |
14941 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 14942 | |
7e314c57 JK |
14943 | /* The die_type call above may have already set the type for this DIE. */ |
14944 | range_type = get_die_type (die, cu); | |
14945 | if (range_type) | |
14946 | return range_type; | |
14947 | ||
729efb13 SA |
14948 | low.kind = PROP_CONST; |
14949 | high.kind = PROP_CONST; | |
14950 | high.data.const_val = 0; | |
14951 | ||
4fae6e18 JK |
14952 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
14953 | omitting DW_AT_lower_bound. */ | |
14954 | switch (cu->language) | |
6e70227d | 14955 | { |
4fae6e18 JK |
14956 | case language_c: |
14957 | case language_cplus: | |
729efb13 | 14958 | low.data.const_val = 0; |
4fae6e18 JK |
14959 | low_default_is_valid = 1; |
14960 | break; | |
14961 | case language_fortran: | |
729efb13 | 14962 | low.data.const_val = 1; |
4fae6e18 JK |
14963 | low_default_is_valid = 1; |
14964 | break; | |
14965 | case language_d: | |
14966 | case language_java: | |
14967 | case language_objc: | |
729efb13 | 14968 | low.data.const_val = 0; |
4fae6e18 JK |
14969 | low_default_is_valid = (cu->header.version >= 4); |
14970 | break; | |
14971 | case language_ada: | |
14972 | case language_m2: | |
14973 | case language_pascal: | |
729efb13 | 14974 | low.data.const_val = 1; |
4fae6e18 JK |
14975 | low_default_is_valid = (cu->header.version >= 4); |
14976 | break; | |
14977 | default: | |
729efb13 | 14978 | low.data.const_val = 0; |
4fae6e18 JK |
14979 | low_default_is_valid = 0; |
14980 | break; | |
a02abb62 JB |
14981 | } |
14982 | ||
e142c38c | 14983 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 14984 | if (attr) |
11c1ba78 | 14985 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
14986 | else if (!low_default_is_valid) |
14987 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
14988 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14989 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 14990 | |
e142c38c | 14991 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 14992 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
14993 | { |
14994 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 14995 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 14996 | { |
c451ebe5 SA |
14997 | /* If bounds are constant do the final calculation here. */ |
14998 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
14999 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
15000 | else | |
15001 | high_bound_is_count = 1; | |
c2ff108b | 15002 | } |
e77813c8 PM |
15003 | } |
15004 | ||
15005 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
15006 | without specifying a base type. | |
15007 | In that case, the base type must be set to the type of | |
15008 | the lower bound, upper bound or count, in that order, if any of these | |
15009 | three attributes references an object that has a type. | |
15010 | If no base type is found, the Dwarf-2 specifications say that | |
15011 | a signed integer type of size equal to the size of an address should | |
15012 | be used. | |
15013 | For the following C code: `extern char gdb_int [];' | |
15014 | GCC produces an empty range DIE. | |
15015 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 15016 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
15017 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
15018 | { | |
15019 | struct objfile *objfile = cu->objfile; | |
15020 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15021 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
15022 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
15023 | ||
15024 | /* Test "int", "long int", and "long long int" objfile types, | |
15025 | and select the first one having a size above or equal to the | |
15026 | architecture address size. */ | |
15027 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15028 | base_type = int_type; | |
15029 | else | |
15030 | { | |
15031 | int_type = objfile_type (objfile)->builtin_long; | |
15032 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15033 | base_type = int_type; | |
15034 | else | |
15035 | { | |
15036 | int_type = objfile_type (objfile)->builtin_long_long; | |
15037 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15038 | base_type = int_type; | |
15039 | } | |
15040 | } | |
15041 | } | |
a02abb62 | 15042 | |
dbb9c2b1 JB |
15043 | /* Normally, the DWARF producers are expected to use a signed |
15044 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
15045 | But this is unfortunately not always the case, as witnessed | |
15046 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
15047 | is used instead. To work around that ambiguity, we treat | |
15048 | the bounds as signed, and thus sign-extend their values, when | |
15049 | the base type is signed. */ | |
6e70227d | 15050 | negative_mask = |
66c6502d | 15051 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
15052 | if (low.kind == PROP_CONST |
15053 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
15054 | low.data.const_val |= negative_mask; | |
15055 | if (high.kind == PROP_CONST | |
15056 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
15057 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 15058 | |
729efb13 | 15059 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 15060 | |
c451ebe5 SA |
15061 | if (high_bound_is_count) |
15062 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
15063 | ||
c2ff108b JK |
15064 | /* Ada expects an empty array on no boundary attributes. */ |
15065 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 15066 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 15067 | |
39cbfefa DJ |
15068 | name = dwarf2_name (die, cu); |
15069 | if (name) | |
15070 | TYPE_NAME (range_type) = name; | |
6e70227d | 15071 | |
e142c38c | 15072 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
15073 | if (attr) |
15074 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
15075 | ||
7e314c57 JK |
15076 | set_die_type (die, range_type, cu); |
15077 | ||
15078 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15079 | set_descriptive_type (range_type, die, cu); |
15080 | ||
7e314c57 | 15081 | return range_type; |
a02abb62 | 15082 | } |
6e70227d | 15083 | |
f792889a | 15084 | static struct type * |
81a17f79 JB |
15085 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
15086 | { | |
15087 | struct type *type; | |
81a17f79 | 15088 | |
81a17f79 JB |
15089 | /* For now, we only support the C meaning of an unspecified type: void. */ |
15090 | ||
0114d602 DJ |
15091 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
15092 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 15093 | |
f792889a | 15094 | return set_die_type (die, type, cu); |
81a17f79 | 15095 | } |
a02abb62 | 15096 | |
639d11d3 DC |
15097 | /* Read a single die and all its descendents. Set the die's sibling |
15098 | field to NULL; set other fields in the die correctly, and set all | |
15099 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
15100 | location of the info_ptr after reading all of those dies. PARENT | |
15101 | is the parent of the die in question. */ | |
15102 | ||
15103 | static struct die_info * | |
dee91e82 | 15104 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
15105 | const gdb_byte *info_ptr, |
15106 | const gdb_byte **new_info_ptr, | |
dee91e82 | 15107 | struct die_info *parent) |
639d11d3 DC |
15108 | { |
15109 | struct die_info *die; | |
d521ce57 | 15110 | const gdb_byte *cur_ptr; |
639d11d3 DC |
15111 | int has_children; |
15112 | ||
bf6af496 | 15113 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
15114 | if (die == NULL) |
15115 | { | |
15116 | *new_info_ptr = cur_ptr; | |
15117 | return NULL; | |
15118 | } | |
93311388 | 15119 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
15120 | |
15121 | if (has_children) | |
bf6af496 | 15122 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
15123 | else |
15124 | { | |
15125 | die->child = NULL; | |
15126 | *new_info_ptr = cur_ptr; | |
15127 | } | |
15128 | ||
15129 | die->sibling = NULL; | |
15130 | die->parent = parent; | |
15131 | return die; | |
15132 | } | |
15133 | ||
15134 | /* Read a die, all of its descendents, and all of its siblings; set | |
15135 | all of the fields of all of the dies correctly. Arguments are as | |
15136 | in read_die_and_children. */ | |
15137 | ||
15138 | static struct die_info * | |
bf6af496 | 15139 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
15140 | const gdb_byte *info_ptr, |
15141 | const gdb_byte **new_info_ptr, | |
bf6af496 | 15142 | struct die_info *parent) |
639d11d3 DC |
15143 | { |
15144 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 15145 | const gdb_byte *cur_ptr; |
639d11d3 | 15146 | |
c906108c | 15147 | cur_ptr = info_ptr; |
639d11d3 DC |
15148 | first_die = last_sibling = NULL; |
15149 | ||
15150 | while (1) | |
c906108c | 15151 | { |
639d11d3 | 15152 | struct die_info *die |
dee91e82 | 15153 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 15154 | |
1d325ec1 | 15155 | if (die == NULL) |
c906108c | 15156 | { |
639d11d3 DC |
15157 | *new_info_ptr = cur_ptr; |
15158 | return first_die; | |
c906108c | 15159 | } |
1d325ec1 DJ |
15160 | |
15161 | if (!first_die) | |
15162 | first_die = die; | |
c906108c | 15163 | else |
1d325ec1 DJ |
15164 | last_sibling->sibling = die; |
15165 | ||
15166 | last_sibling = die; | |
c906108c | 15167 | } |
c906108c SS |
15168 | } |
15169 | ||
bf6af496 DE |
15170 | /* Read a die, all of its descendents, and all of its siblings; set |
15171 | all of the fields of all of the dies correctly. Arguments are as | |
15172 | in read_die_and_children. | |
15173 | This the main entry point for reading a DIE and all its children. */ | |
15174 | ||
15175 | static struct die_info * | |
15176 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
15177 | const gdb_byte *info_ptr, |
15178 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
15179 | struct die_info *parent) |
15180 | { | |
15181 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
15182 | new_info_ptr, parent); | |
15183 | ||
b4f54984 | 15184 | if (dwarf_die_debug) |
bf6af496 DE |
15185 | { |
15186 | fprintf_unfiltered (gdb_stdlog, | |
15187 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15188 | get_section_name (reader->die_section), |
bf6af496 DE |
15189 | (unsigned) (info_ptr - reader->die_section->buffer), |
15190 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15191 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
15192 | } |
15193 | ||
15194 | return die; | |
15195 | } | |
15196 | ||
3019eac3 DE |
15197 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
15198 | attributes. | |
15199 | The caller is responsible for filling in the extra attributes | |
15200 | and updating (*DIEP)->num_attrs. | |
15201 | Set DIEP to point to a newly allocated die with its information, | |
15202 | except for its child, sibling, and parent fields. | |
15203 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 15204 | |
d521ce57 | 15205 | static const gdb_byte * |
3019eac3 | 15206 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 15207 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 15208 | int *has_children, int num_extra_attrs) |
93311388 | 15209 | { |
b64f50a1 JK |
15210 | unsigned int abbrev_number, bytes_read, i; |
15211 | sect_offset offset; | |
93311388 DE |
15212 | struct abbrev_info *abbrev; |
15213 | struct die_info *die; | |
15214 | struct dwarf2_cu *cu = reader->cu; | |
15215 | bfd *abfd = reader->abfd; | |
15216 | ||
b64f50a1 | 15217 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
15218 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15219 | info_ptr += bytes_read; | |
15220 | if (!abbrev_number) | |
15221 | { | |
15222 | *diep = NULL; | |
15223 | *has_children = 0; | |
15224 | return info_ptr; | |
15225 | } | |
15226 | ||
433df2d4 | 15227 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 15228 | if (!abbrev) |
348e048f DE |
15229 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
15230 | abbrev_number, | |
15231 | bfd_get_filename (abfd)); | |
15232 | ||
3019eac3 | 15233 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
15234 | die->offset = offset; |
15235 | die->tag = abbrev->tag; | |
15236 | die->abbrev = abbrev_number; | |
15237 | ||
3019eac3 DE |
15238 | /* Make the result usable. |
15239 | The caller needs to update num_attrs after adding the extra | |
15240 | attributes. */ | |
93311388 DE |
15241 | die->num_attrs = abbrev->num_attrs; |
15242 | ||
15243 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
15244 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
15245 | info_ptr); | |
93311388 DE |
15246 | |
15247 | *diep = die; | |
15248 | *has_children = abbrev->has_children; | |
15249 | return info_ptr; | |
15250 | } | |
15251 | ||
3019eac3 DE |
15252 | /* Read a die and all its attributes. |
15253 | Set DIEP to point to a newly allocated die with its information, | |
15254 | except for its child, sibling, and parent fields. | |
15255 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
15256 | ||
d521ce57 | 15257 | static const gdb_byte * |
3019eac3 | 15258 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 15259 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
15260 | int *has_children) |
15261 | { | |
d521ce57 | 15262 | const gdb_byte *result; |
bf6af496 DE |
15263 | |
15264 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
15265 | ||
b4f54984 | 15266 | if (dwarf_die_debug) |
bf6af496 DE |
15267 | { |
15268 | fprintf_unfiltered (gdb_stdlog, | |
15269 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15270 | get_section_name (reader->die_section), |
bf6af496 DE |
15271 | (unsigned) (info_ptr - reader->die_section->buffer), |
15272 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15273 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
15274 | } |
15275 | ||
15276 | return result; | |
3019eac3 | 15277 | } |
433df2d4 DE |
15278 | \f |
15279 | /* Abbreviation tables. | |
3019eac3 | 15280 | |
433df2d4 | 15281 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
15282 | stored in a separate .debug_abbrev section. Before we read any |
15283 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
15284 | in a hash table. */ |
15285 | ||
15286 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
15287 | ||
15288 | static struct abbrev_info * | |
15289 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
15290 | { | |
15291 | struct abbrev_info *abbrev; | |
15292 | ||
8d749320 | 15293 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 15294 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 15295 | |
433df2d4 DE |
15296 | return abbrev; |
15297 | } | |
15298 | ||
15299 | /* Add an abbreviation to the table. */ | |
c906108c SS |
15300 | |
15301 | static void | |
433df2d4 DE |
15302 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15303 | unsigned int abbrev_number, | |
15304 | struct abbrev_info *abbrev) | |
15305 | { | |
15306 | unsigned int hash_number; | |
15307 | ||
15308 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15309 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15310 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15311 | } | |
dee91e82 | 15312 | |
433df2d4 DE |
15313 | /* Look up an abbrev in the table. |
15314 | Returns NULL if the abbrev is not found. */ | |
15315 | ||
15316 | static struct abbrev_info * | |
15317 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15318 | unsigned int abbrev_number) | |
c906108c | 15319 | { |
433df2d4 DE |
15320 | unsigned int hash_number; |
15321 | struct abbrev_info *abbrev; | |
15322 | ||
15323 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15324 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15325 | ||
15326 | while (abbrev) | |
15327 | { | |
15328 | if (abbrev->number == abbrev_number) | |
15329 | return abbrev; | |
15330 | abbrev = abbrev->next; | |
15331 | } | |
15332 | return NULL; | |
15333 | } | |
15334 | ||
15335 | /* Read in an abbrev table. */ | |
15336 | ||
15337 | static struct abbrev_table * | |
15338 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
15339 | sect_offset offset) | |
15340 | { | |
15341 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15342 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15343 | struct abbrev_table *abbrev_table; |
d521ce57 | 15344 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15345 | struct abbrev_info *cur_abbrev; |
15346 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15347 | unsigned int abbrev_form; |
f3dd6933 DJ |
15348 | struct attr_abbrev *cur_attrs; |
15349 | unsigned int allocated_attrs; | |
c906108c | 15350 | |
70ba0933 | 15351 | abbrev_table = XNEW (struct abbrev_table); |
f4dc4d17 | 15352 | abbrev_table->offset = offset; |
433df2d4 | 15353 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
15354 | abbrev_table->abbrevs = |
15355 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
15356 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
15357 | memset (abbrev_table->abbrevs, 0, |
15358 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15359 | |
433df2d4 DE |
15360 | dwarf2_read_section (objfile, section); |
15361 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
15362 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15363 | abbrev_ptr += bytes_read; | |
15364 | ||
f3dd6933 | 15365 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 15366 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 15367 | |
0963b4bd | 15368 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15369 | while (abbrev_number) |
15370 | { | |
433df2d4 | 15371 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15372 | |
15373 | /* read in abbrev header */ | |
15374 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
15375 | cur_abbrev->tag |
15376 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
15377 | abbrev_ptr += bytes_read; |
15378 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15379 | abbrev_ptr += 1; | |
15380 | ||
15381 | /* now read in declarations */ | |
15382 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15383 | abbrev_ptr += bytes_read; | |
15384 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15385 | abbrev_ptr += bytes_read; | |
15386 | while (abbrev_name) | |
15387 | { | |
f3dd6933 | 15388 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15389 | { |
f3dd6933 DJ |
15390 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15391 | cur_attrs | |
224c3ddb | 15392 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 15393 | } |
ae038cb0 | 15394 | |
aead7601 SM |
15395 | cur_attrs[cur_abbrev->num_attrs].name |
15396 | = (enum dwarf_attribute) abbrev_name; | |
15397 | cur_attrs[cur_abbrev->num_attrs++].form | |
15398 | = (enum dwarf_form) abbrev_form; | |
c906108c SS |
15399 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15400 | abbrev_ptr += bytes_read; | |
15401 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15402 | abbrev_ptr += bytes_read; | |
15403 | } | |
15404 | ||
8d749320 SM |
15405 | cur_abbrev->attrs = |
15406 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
15407 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
15408 | memcpy (cur_abbrev->attrs, cur_attrs, |
15409 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15410 | ||
433df2d4 | 15411 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15412 | |
15413 | /* Get next abbreviation. | |
15414 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15415 | always properly terminated with an abbrev number of 0. |
15416 | Exit loop if we encounter an abbreviation which we have | |
15417 | already read (which means we are about to read the abbreviations | |
15418 | for the next compile unit) or if the end of the abbreviation | |
15419 | table is reached. */ | |
433df2d4 | 15420 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15421 | break; |
15422 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15423 | abbrev_ptr += bytes_read; | |
433df2d4 | 15424 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15425 | break; |
15426 | } | |
f3dd6933 DJ |
15427 | |
15428 | xfree (cur_attrs); | |
433df2d4 | 15429 | return abbrev_table; |
c906108c SS |
15430 | } |
15431 | ||
433df2d4 | 15432 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15433 | |
c906108c | 15434 | static void |
433df2d4 | 15435 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15436 | { |
433df2d4 DE |
15437 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15438 | xfree (abbrev_table); | |
c906108c SS |
15439 | } |
15440 | ||
f4dc4d17 DE |
15441 | /* Same as abbrev_table_free but as a cleanup. |
15442 | We pass in a pointer to the pointer to the table so that we can | |
15443 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15444 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15445 | |
15446 | static void | |
15447 | abbrev_table_free_cleanup (void *table_ptr) | |
15448 | { | |
9a3c8263 | 15449 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
15450 | |
15451 | if (*abbrev_table_ptr != NULL) | |
15452 | abbrev_table_free (*abbrev_table_ptr); | |
15453 | *abbrev_table_ptr = NULL; | |
15454 | } | |
15455 | ||
433df2d4 DE |
15456 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15457 | ||
15458 | static void | |
15459 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15460 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15461 | { |
433df2d4 DE |
15462 | cu->abbrev_table = |
15463 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
15464 | } | |
c906108c | 15465 | |
433df2d4 | 15466 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15467 | |
433df2d4 DE |
15468 | static void |
15469 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15470 | { | |
9a3c8263 | 15471 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 15472 | |
a2ce51a0 DE |
15473 | if (cu->abbrev_table != NULL) |
15474 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15475 | /* Set this to NULL so that we SEGV if we try to read it later, |
15476 | and also because free_comp_unit verifies this is NULL. */ | |
15477 | cu->abbrev_table = NULL; | |
15478 | } | |
15479 | \f | |
72bf9492 DJ |
15480 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15481 | symbol for. */ | |
15482 | ||
15483 | static int | |
15484 | is_type_tag_for_partial (int tag) | |
15485 | { | |
15486 | switch (tag) | |
15487 | { | |
15488 | #if 0 | |
15489 | /* Some types that would be reasonable to generate partial symbols for, | |
15490 | that we don't at present. */ | |
15491 | case DW_TAG_array_type: | |
15492 | case DW_TAG_file_type: | |
15493 | case DW_TAG_ptr_to_member_type: | |
15494 | case DW_TAG_set_type: | |
15495 | case DW_TAG_string_type: | |
15496 | case DW_TAG_subroutine_type: | |
15497 | #endif | |
15498 | case DW_TAG_base_type: | |
15499 | case DW_TAG_class_type: | |
680b30c7 | 15500 | case DW_TAG_interface_type: |
72bf9492 DJ |
15501 | case DW_TAG_enumeration_type: |
15502 | case DW_TAG_structure_type: | |
15503 | case DW_TAG_subrange_type: | |
15504 | case DW_TAG_typedef: | |
15505 | case DW_TAG_union_type: | |
15506 | return 1; | |
15507 | default: | |
15508 | return 0; | |
15509 | } | |
15510 | } | |
15511 | ||
15512 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15513 | ||
15514 | static struct partial_die_info * | |
dee91e82 | 15515 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15516 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15517 | { |
dee91e82 | 15518 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15519 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15520 | struct partial_die_info *part_die; |
15521 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15522 | struct abbrev_info *abbrev; | |
15523 | unsigned int bytes_read; | |
5afb4e99 | 15524 | unsigned int load_all = 0; |
72bf9492 DJ |
15525 | int nesting_level = 1; |
15526 | ||
15527 | parent_die = NULL; | |
15528 | last_die = NULL; | |
15529 | ||
7adf1e79 DE |
15530 | gdb_assert (cu->per_cu != NULL); |
15531 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
15532 | load_all = 1; |
15533 | ||
72bf9492 DJ |
15534 | cu->partial_dies |
15535 | = htab_create_alloc_ex (cu->header.length / 12, | |
15536 | partial_die_hash, | |
15537 | partial_die_eq, | |
15538 | NULL, | |
15539 | &cu->comp_unit_obstack, | |
15540 | hashtab_obstack_allocate, | |
15541 | dummy_obstack_deallocate); | |
15542 | ||
8d749320 | 15543 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
15544 | |
15545 | while (1) | |
15546 | { | |
15547 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
15548 | ||
15549 | /* A NULL abbrev means the end of a series of children. */ | |
15550 | if (abbrev == NULL) | |
15551 | { | |
15552 | if (--nesting_level == 0) | |
15553 | { | |
15554 | /* PART_DIE was probably the last thing allocated on the | |
15555 | comp_unit_obstack, so we could call obstack_free | |
15556 | here. We don't do that because the waste is small, | |
15557 | and will be cleaned up when we're done with this | |
15558 | compilation unit. This way, we're also more robust | |
15559 | against other users of the comp_unit_obstack. */ | |
15560 | return first_die; | |
15561 | } | |
15562 | info_ptr += bytes_read; | |
15563 | last_die = parent_die; | |
15564 | parent_die = parent_die->die_parent; | |
15565 | continue; | |
15566 | } | |
15567 | ||
98bfdba5 PA |
15568 | /* Check for template arguments. We never save these; if |
15569 | they're seen, we just mark the parent, and go on our way. */ | |
15570 | if (parent_die != NULL | |
15571 | && cu->language == language_cplus | |
15572 | && (abbrev->tag == DW_TAG_template_type_param | |
15573 | || abbrev->tag == DW_TAG_template_value_param)) | |
15574 | { | |
15575 | parent_die->has_template_arguments = 1; | |
15576 | ||
15577 | if (!load_all) | |
15578 | { | |
15579 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 15580 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15581 | continue; |
15582 | } | |
15583 | } | |
15584 | ||
0d99eb77 | 15585 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
15586 | Skip their other children. */ |
15587 | if (!load_all | |
15588 | && cu->language == language_cplus | |
15589 | && parent_die != NULL | |
15590 | && parent_die->tag == DW_TAG_subprogram) | |
15591 | { | |
dee91e82 | 15592 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15593 | continue; |
15594 | } | |
15595 | ||
5afb4e99 DJ |
15596 | /* Check whether this DIE is interesting enough to save. Normally |
15597 | we would not be interested in members here, but there may be | |
15598 | later variables referencing them via DW_AT_specification (for | |
15599 | static members). */ | |
15600 | if (!load_all | |
15601 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 15602 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
15603 | && abbrev->tag != DW_TAG_enumerator |
15604 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 15605 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 15606 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 15607 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 15608 | && abbrev->tag != DW_TAG_module |
95554aad | 15609 | && abbrev->tag != DW_TAG_member |
74921315 KS |
15610 | && abbrev->tag != DW_TAG_imported_unit |
15611 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
15612 | { |
15613 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15614 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
15615 | continue; |
15616 | } | |
15617 | ||
dee91e82 DE |
15618 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
15619 | info_ptr); | |
72bf9492 DJ |
15620 | |
15621 | /* This two-pass algorithm for processing partial symbols has a | |
15622 | high cost in cache pressure. Thus, handle some simple cases | |
15623 | here which cover the majority of C partial symbols. DIEs | |
15624 | which neither have specification tags in them, nor could have | |
15625 | specification tags elsewhere pointing at them, can simply be | |
15626 | processed and discarded. | |
15627 | ||
15628 | This segment is also optional; scan_partial_symbols and | |
15629 | add_partial_symbol will handle these DIEs if we chain | |
15630 | them in normally. When compilers which do not emit large | |
15631 | quantities of duplicate debug information are more common, | |
15632 | this code can probably be removed. */ | |
15633 | ||
15634 | /* Any complete simple types at the top level (pretty much all | |
15635 | of them, for a language without namespaces), can be processed | |
15636 | directly. */ | |
15637 | if (parent_die == NULL | |
15638 | && part_die->has_specification == 0 | |
15639 | && part_die->is_declaration == 0 | |
d8228535 | 15640 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
15641 | || part_die->tag == DW_TAG_base_type |
15642 | || part_die->tag == DW_TAG_subrange_type)) | |
15643 | { | |
15644 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 15645 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15646 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 15647 | &objfile->static_psymbols, |
1762568f | 15648 | 0, cu->language, objfile); |
dee91e82 | 15649 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15650 | continue; |
15651 | } | |
15652 | ||
d8228535 JK |
15653 | /* The exception for DW_TAG_typedef with has_children above is |
15654 | a workaround of GCC PR debug/47510. In the case of this complaint | |
15655 | type_name_no_tag_or_error will error on such types later. | |
15656 | ||
15657 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
15658 | it could not find the child DIEs referenced later, this is checked | |
15659 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
15660 | ||
15661 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
15662 | complaint (&symfile_complaints, | |
15663 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
15664 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15665 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 15666 | |
72bf9492 DJ |
15667 | /* If we're at the second level, and we're an enumerator, and |
15668 | our parent has no specification (meaning possibly lives in a | |
15669 | namespace elsewhere), then we can add the partial symbol now | |
15670 | instead of queueing it. */ | |
15671 | if (part_die->tag == DW_TAG_enumerator | |
15672 | && parent_die != NULL | |
15673 | && parent_die->die_parent == NULL | |
15674 | && parent_die->tag == DW_TAG_enumeration_type | |
15675 | && parent_die->has_specification == 0) | |
15676 | { | |
15677 | if (part_die->name == NULL) | |
3e43a32a MS |
15678 | complaint (&symfile_complaints, |
15679 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 15680 | else if (building_psymtab) |
04a679b8 | 15681 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15682 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
15683 | (cu->language == language_cplus |
15684 | || cu->language == language_java) | |
bb5ed363 DE |
15685 | ? &objfile->global_psymbols |
15686 | : &objfile->static_psymbols, | |
1762568f | 15687 | 0, cu->language, objfile); |
72bf9492 | 15688 | |
dee91e82 | 15689 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15690 | continue; |
15691 | } | |
15692 | ||
15693 | /* We'll save this DIE so link it in. */ | |
15694 | part_die->die_parent = parent_die; | |
15695 | part_die->die_sibling = NULL; | |
15696 | part_die->die_child = NULL; | |
15697 | ||
15698 | if (last_die && last_die == parent_die) | |
15699 | last_die->die_child = part_die; | |
15700 | else if (last_die) | |
15701 | last_die->die_sibling = part_die; | |
15702 | ||
15703 | last_die = part_die; | |
15704 | ||
15705 | if (first_die == NULL) | |
15706 | first_die = part_die; | |
15707 | ||
15708 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
15709 | find interesting need to be in the hash table, because we | |
15710 | also have the parent/sibling/child chains; only those that we | |
15711 | might refer to by offset later during partial symbol reading. | |
15712 | ||
15713 | For now this means things that might have be the target of a | |
15714 | DW_AT_specification, DW_AT_abstract_origin, or | |
15715 | DW_AT_extension. DW_AT_extension will refer only to | |
15716 | namespaces; DW_AT_abstract_origin refers to functions (and | |
15717 | many things under the function DIE, but we do not recurse | |
15718 | into function DIEs during partial symbol reading) and | |
15719 | possibly variables as well; DW_AT_specification refers to | |
15720 | declarations. Declarations ought to have the DW_AT_declaration | |
15721 | flag. It happens that GCC forgets to put it in sometimes, but | |
15722 | only for functions, not for types. | |
15723 | ||
15724 | Adding more things than necessary to the hash table is harmless | |
15725 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
15726 | wasted time in find_partial_die, when we reread the compilation |
15727 | unit with load_all_dies set. */ | |
72bf9492 | 15728 | |
5afb4e99 | 15729 | if (load_all |
72929c62 | 15730 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 15731 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
15732 | || abbrev->tag == DW_TAG_variable |
15733 | || abbrev->tag == DW_TAG_namespace | |
15734 | || part_die->is_declaration) | |
15735 | { | |
15736 | void **slot; | |
15737 | ||
15738 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 15739 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
15740 | *slot = part_die; |
15741 | } | |
15742 | ||
8d749320 | 15743 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
15744 | |
15745 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 15746 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
15747 | languages we have to, so that we can get at method physnames |
15748 | to infer fully qualified class names, for DW_AT_specification, | |
15749 | and for C++ template arguments. For C++, we also look one level | |
15750 | inside functions to find template arguments (if the name of the | |
15751 | function does not already contain the template arguments). | |
bc30ff58 JB |
15752 | |
15753 | For Ada, we need to scan the children of subprograms and lexical | |
15754 | blocks as well because Ada allows the definition of nested | |
15755 | entities that could be interesting for the debugger, such as | |
15756 | nested subprograms for instance. */ | |
72bf9492 | 15757 | if (last_die->has_children |
5afb4e99 DJ |
15758 | && (load_all |
15759 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 15760 | || last_die->tag == DW_TAG_module |
72bf9492 | 15761 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
15762 | || (cu->language == language_cplus |
15763 | && last_die->tag == DW_TAG_subprogram | |
15764 | && (last_die->name == NULL | |
15765 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
15766 | || (cu->language != language_c |
15767 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 15768 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 15769 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
15770 | || last_die->tag == DW_TAG_union_type)) |
15771 | || (cu->language == language_ada | |
15772 | && (last_die->tag == DW_TAG_subprogram | |
15773 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
15774 | { |
15775 | nesting_level++; | |
15776 | parent_die = last_die; | |
15777 | continue; | |
15778 | } | |
15779 | ||
15780 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15781 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
15782 | |
15783 | /* Back to the top, do it again. */ | |
15784 | } | |
15785 | } | |
15786 | ||
c906108c SS |
15787 | /* Read a minimal amount of information into the minimal die structure. */ |
15788 | ||
d521ce57 | 15789 | static const gdb_byte * |
dee91e82 DE |
15790 | read_partial_die (const struct die_reader_specs *reader, |
15791 | struct partial_die_info *part_die, | |
15792 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 15793 | const gdb_byte *info_ptr) |
c906108c | 15794 | { |
dee91e82 | 15795 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15796 | struct objfile *objfile = cu->objfile; |
d521ce57 | 15797 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 15798 | unsigned int i; |
c906108c | 15799 | struct attribute attr; |
c5aa993b | 15800 | int has_low_pc_attr = 0; |
c906108c | 15801 | int has_high_pc_attr = 0; |
91da1414 | 15802 | int high_pc_relative = 0; |
c906108c | 15803 | |
72bf9492 | 15804 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 15805 | |
b64f50a1 | 15806 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
15807 | |
15808 | info_ptr += abbrev_len; | |
15809 | ||
15810 | if (abbrev == NULL) | |
15811 | return info_ptr; | |
15812 | ||
c906108c SS |
15813 | part_die->tag = abbrev->tag; |
15814 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
15815 | |
15816 | for (i = 0; i < abbrev->num_attrs; ++i) | |
15817 | { | |
dee91e82 | 15818 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
15819 | |
15820 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 15821 | partial symbol table. */ |
c906108c SS |
15822 | switch (attr.name) |
15823 | { | |
15824 | case DW_AT_name: | |
71c25dea TT |
15825 | switch (part_die->tag) |
15826 | { | |
15827 | case DW_TAG_compile_unit: | |
95554aad | 15828 | case DW_TAG_partial_unit: |
348e048f | 15829 | case DW_TAG_type_unit: |
71c25dea TT |
15830 | /* Compilation units have a DW_AT_name that is a filename, not |
15831 | a source language identifier. */ | |
15832 | case DW_TAG_enumeration_type: | |
15833 | case DW_TAG_enumerator: | |
15834 | /* These tags always have simple identifiers already; no need | |
15835 | to canonicalize them. */ | |
15836 | part_die->name = DW_STRING (&attr); | |
15837 | break; | |
15838 | default: | |
15839 | part_die->name | |
15840 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 15841 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
15842 | break; |
15843 | } | |
c906108c | 15844 | break; |
31ef98ae | 15845 | case DW_AT_linkage_name: |
c906108c | 15846 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
15847 | /* Note that both forms of linkage name might appear. We |
15848 | assume they will be the same, and we only store the last | |
15849 | one we see. */ | |
94af9270 KS |
15850 | if (cu->language == language_ada) |
15851 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 15852 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
15853 | break; |
15854 | case DW_AT_low_pc: | |
15855 | has_low_pc_attr = 1; | |
31aa7e4e | 15856 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
15857 | break; |
15858 | case DW_AT_high_pc: | |
15859 | has_high_pc_attr = 1; | |
31aa7e4e JB |
15860 | part_die->highpc = attr_value_as_address (&attr); |
15861 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
15862 | high_pc_relative = 1; | |
c906108c SS |
15863 | break; |
15864 | case DW_AT_location: | |
0963b4bd | 15865 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
15866 | if (attr_form_is_block (&attr)) |
15867 | { | |
95554aad | 15868 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 15869 | } |
3690dd37 | 15870 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 15871 | { |
4d3c2250 | 15872 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15873 | } |
15874 | else | |
15875 | { | |
4d3c2250 KB |
15876 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
15877 | "partial symbol information"); | |
8e19ed76 | 15878 | } |
c906108c | 15879 | break; |
c906108c SS |
15880 | case DW_AT_external: |
15881 | part_die->is_external = DW_UNSND (&attr); | |
15882 | break; | |
15883 | case DW_AT_declaration: | |
15884 | part_die->is_declaration = DW_UNSND (&attr); | |
15885 | break; | |
15886 | case DW_AT_type: | |
15887 | part_die->has_type = 1; | |
15888 | break; | |
15889 | case DW_AT_abstract_origin: | |
15890 | case DW_AT_specification: | |
72bf9492 DJ |
15891 | case DW_AT_extension: |
15892 | part_die->has_specification = 1; | |
c764a876 | 15893 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
15894 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
15895 | || cu->per_cu->is_dwz); | |
c906108c SS |
15896 | break; |
15897 | case DW_AT_sibling: | |
15898 | /* Ignore absolute siblings, they might point outside of | |
15899 | the current compile unit. */ | |
15900 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
15901 | complaint (&symfile_complaints, |
15902 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 15903 | else |
b9502d3f WN |
15904 | { |
15905 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
15906 | const gdb_byte *sibling_ptr = buffer + off; | |
15907 | ||
15908 | if (sibling_ptr < info_ptr) | |
15909 | complaint (&symfile_complaints, | |
15910 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
15911 | else if (sibling_ptr > reader->buffer_end) |
15912 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
15913 | else |
15914 | part_die->sibling = sibling_ptr; | |
15915 | } | |
c906108c | 15916 | break; |
fa4028e9 JB |
15917 | case DW_AT_byte_size: |
15918 | part_die->has_byte_size = 1; | |
15919 | break; | |
ff908ebf AW |
15920 | case DW_AT_const_value: |
15921 | part_die->has_const_value = 1; | |
15922 | break; | |
68511cec CES |
15923 | case DW_AT_calling_convention: |
15924 | /* DWARF doesn't provide a way to identify a program's source-level | |
15925 | entry point. DW_AT_calling_convention attributes are only meant | |
15926 | to describe functions' calling conventions. | |
15927 | ||
15928 | However, because it's a necessary piece of information in | |
15929 | Fortran, and because DW_CC_program is the only piece of debugging | |
15930 | information whose definition refers to a 'main program' at all, | |
15931 | several compilers have begun marking Fortran main programs with | |
15932 | DW_CC_program --- even when those functions use the standard | |
15933 | calling conventions. | |
15934 | ||
15935 | So until DWARF specifies a way to provide this information and | |
15936 | compilers pick up the new representation, we'll support this | |
15937 | practice. */ | |
15938 | if (DW_UNSND (&attr) == DW_CC_program | |
dc365182 JH |
15939 | && cu->language == language_fortran |
15940 | && part_die->name != NULL) | |
3d548a53 | 15941 | set_objfile_main_name (objfile, part_die->name, language_fortran); |
68511cec | 15942 | break; |
481860b3 GB |
15943 | case DW_AT_inline: |
15944 | if (DW_UNSND (&attr) == DW_INL_inlined | |
15945 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
15946 | part_die->may_be_inlined = 1; | |
15947 | break; | |
95554aad TT |
15948 | |
15949 | case DW_AT_import: | |
15950 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
15951 | { |
15952 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
15953 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
15954 | || cu->per_cu->is_dwz); | |
15955 | } | |
95554aad TT |
15956 | break; |
15957 | ||
c906108c SS |
15958 | default: |
15959 | break; | |
15960 | } | |
15961 | } | |
15962 | ||
91da1414 MW |
15963 | if (high_pc_relative) |
15964 | part_die->highpc += part_die->lowpc; | |
15965 | ||
9373cf26 JK |
15966 | if (has_low_pc_attr && has_high_pc_attr) |
15967 | { | |
15968 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
15969 | eliminate duplicate copies of functions and vtables and such. | |
15970 | The linker will arbitrarily choose one and discard the others. | |
15971 | The AT_*_pc values for such functions refer to local labels in | |
15972 | these sections. If the section from that file was discarded, the | |
15973 | labels are not in the output, so the relocs get a value of 0. | |
15974 | If this is a discarded function, mark the pc bounds as invalid, | |
15975 | so that GDB will ignore it. */ | |
15976 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15977 | { | |
bb5ed363 | 15978 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15979 | |
15980 | complaint (&symfile_complaints, | |
15981 | _("DW_AT_low_pc %s is zero " | |
15982 | "for DIE at 0x%x [in module %s]"), | |
15983 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 15984 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15985 | } |
15986 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
15987 | else if (part_die->lowpc >= part_die->highpc) | |
15988 | { | |
bb5ed363 | 15989 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15990 | |
15991 | complaint (&symfile_complaints, | |
15992 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
15993 | "for DIE at 0x%x [in module %s]"), | |
15994 | paddress (gdbarch, part_die->lowpc), | |
15995 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 15996 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15997 | } |
15998 | else | |
15999 | part_die->has_pc_info = 1; | |
16000 | } | |
85cbf3d3 | 16001 | |
c906108c SS |
16002 | return info_ptr; |
16003 | } | |
16004 | ||
72bf9492 DJ |
16005 | /* Find a cached partial DIE at OFFSET in CU. */ |
16006 | ||
16007 | static struct partial_die_info * | |
b64f50a1 | 16008 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
16009 | { |
16010 | struct partial_die_info *lookup_die = NULL; | |
16011 | struct partial_die_info part_die; | |
16012 | ||
16013 | part_die.offset = offset; | |
9a3c8263 SM |
16014 | lookup_die = ((struct partial_die_info *) |
16015 | htab_find_with_hash (cu->partial_dies, &part_die, | |
16016 | offset.sect_off)); | |
72bf9492 | 16017 | |
72bf9492 DJ |
16018 | return lookup_die; |
16019 | } | |
16020 | ||
348e048f DE |
16021 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
16022 | except in the case of .debug_types DIEs which do not reference | |
16023 | outside their CU (they do however referencing other types via | |
55f1336d | 16024 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
16025 | |
16026 | static struct partial_die_info * | |
36586728 | 16027 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 16028 | { |
bb5ed363 | 16029 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
16030 | struct dwarf2_per_cu_data *per_cu = NULL; |
16031 | struct partial_die_info *pd = NULL; | |
72bf9492 | 16032 | |
36586728 TT |
16033 | if (offset_in_dwz == cu->per_cu->is_dwz |
16034 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
16035 | { |
16036 | pd = find_partial_die_in_comp_unit (offset, cu); | |
16037 | if (pd != NULL) | |
16038 | return pd; | |
0d99eb77 DE |
16039 | /* We missed recording what we needed. |
16040 | Load all dies and try again. */ | |
16041 | per_cu = cu->per_cu; | |
5afb4e99 | 16042 | } |
0d99eb77 DE |
16043 | else |
16044 | { | |
16045 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 16046 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
16047 | { |
16048 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
16049 | " external reference to offset 0x%lx [in module %s].\n"), | |
16050 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
16051 | bfd_get_filename (objfile->obfd)); | |
16052 | } | |
36586728 TT |
16053 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
16054 | objfile); | |
72bf9492 | 16055 | |
0d99eb77 DE |
16056 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
16057 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 16058 | |
0d99eb77 DE |
16059 | per_cu->cu->last_used = 0; |
16060 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
16061 | } | |
5afb4e99 | 16062 | |
dee91e82 DE |
16063 | /* If we didn't find it, and not all dies have been loaded, |
16064 | load them all and try again. */ | |
16065 | ||
5afb4e99 DJ |
16066 | if (pd == NULL && per_cu->load_all_dies == 0) |
16067 | { | |
5afb4e99 | 16068 | per_cu->load_all_dies = 1; |
fd820528 DE |
16069 | |
16070 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
16071 | THIS_CU->cu may already be in use. So we can't just free it and | |
16072 | replace its DIEs with the ones we read in. Instead, we leave those | |
16073 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
16074 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
16075 | set. */ | |
dee91e82 | 16076 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
16077 | |
16078 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
16079 | } | |
16080 | ||
16081 | if (pd == NULL) | |
16082 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
16083 | _("could not find partial DIE 0x%x " |
16084 | "in cache [from module %s]\n"), | |
b64f50a1 | 16085 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 16086 | return pd; |
72bf9492 DJ |
16087 | } |
16088 | ||
abc72ce4 DE |
16089 | /* See if we can figure out if the class lives in a namespace. We do |
16090 | this by looking for a member function; its demangled name will | |
16091 | contain namespace info, if there is any. */ | |
16092 | ||
16093 | static void | |
16094 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
16095 | struct dwarf2_cu *cu) | |
16096 | { | |
16097 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
16098 | what template types look like, because the demangler | |
16099 | frequently doesn't give the same name as the debug info. We | |
16100 | could fix this by only using the demangled name to get the | |
16101 | prefix (but see comment in read_structure_type). */ | |
16102 | ||
16103 | struct partial_die_info *real_pdi; | |
16104 | struct partial_die_info *child_pdi; | |
16105 | ||
16106 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
16107 | we should not do this. We'll prepend the parent's fully qualified | |
16108 | name when we create the partial symbol. */ | |
16109 | ||
16110 | real_pdi = struct_pdi; | |
16111 | while (real_pdi->has_specification) | |
36586728 TT |
16112 | real_pdi = find_partial_die (real_pdi->spec_offset, |
16113 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
16114 | |
16115 | if (real_pdi->die_parent != NULL) | |
16116 | return; | |
16117 | ||
16118 | for (child_pdi = struct_pdi->die_child; | |
16119 | child_pdi != NULL; | |
16120 | child_pdi = child_pdi->die_sibling) | |
16121 | { | |
16122 | if (child_pdi->tag == DW_TAG_subprogram | |
16123 | && child_pdi->linkage_name != NULL) | |
16124 | { | |
16125 | char *actual_class_name | |
16126 | = language_class_name_from_physname (cu->language_defn, | |
16127 | child_pdi->linkage_name); | |
16128 | if (actual_class_name != NULL) | |
16129 | { | |
16130 | struct_pdi->name | |
224c3ddb SM |
16131 | = ((const char *) |
16132 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16133 | actual_class_name, | |
16134 | strlen (actual_class_name))); | |
abc72ce4 DE |
16135 | xfree (actual_class_name); |
16136 | } | |
16137 | break; | |
16138 | } | |
16139 | } | |
16140 | } | |
16141 | ||
72bf9492 DJ |
16142 | /* Adjust PART_DIE before generating a symbol for it. This function |
16143 | may set the is_external flag or change the DIE's name. */ | |
16144 | ||
16145 | static void | |
16146 | fixup_partial_die (struct partial_die_info *part_die, | |
16147 | struct dwarf2_cu *cu) | |
16148 | { | |
abc72ce4 DE |
16149 | /* Once we've fixed up a die, there's no point in doing so again. |
16150 | This also avoids a memory leak if we were to call | |
16151 | guess_partial_die_structure_name multiple times. */ | |
16152 | if (part_die->fixup_called) | |
16153 | return; | |
16154 | ||
72bf9492 DJ |
16155 | /* If we found a reference attribute and the DIE has no name, try |
16156 | to find a name in the referred to DIE. */ | |
16157 | ||
16158 | if (part_die->name == NULL && part_die->has_specification) | |
16159 | { | |
16160 | struct partial_die_info *spec_die; | |
72bf9492 | 16161 | |
36586728 TT |
16162 | spec_die = find_partial_die (part_die->spec_offset, |
16163 | part_die->spec_is_dwz, cu); | |
72bf9492 | 16164 | |
10b3939b | 16165 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
16166 | |
16167 | if (spec_die->name) | |
16168 | { | |
16169 | part_die->name = spec_die->name; | |
16170 | ||
16171 | /* Copy DW_AT_external attribute if it is set. */ | |
16172 | if (spec_die->is_external) | |
16173 | part_die->is_external = spec_die->is_external; | |
16174 | } | |
16175 | } | |
16176 | ||
16177 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
16178 | |
16179 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 16180 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 16181 | |
abc72ce4 DE |
16182 | /* If there is no parent die to provide a namespace, and there are |
16183 | children, see if we can determine the namespace from their linkage | |
122d1940 | 16184 | name. */ |
abc72ce4 | 16185 | if (cu->language == language_cplus |
8b70b953 | 16186 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16187 | && part_die->die_parent == NULL |
16188 | && part_die->has_children | |
16189 | && (part_die->tag == DW_TAG_class_type | |
16190 | || part_die->tag == DW_TAG_structure_type | |
16191 | || part_die->tag == DW_TAG_union_type)) | |
16192 | guess_partial_die_structure_name (part_die, cu); | |
16193 | ||
53832f31 TT |
16194 | /* GCC might emit a nameless struct or union that has a linkage |
16195 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16196 | if (part_die->name == NULL | |
96408a79 SA |
16197 | && (part_die->tag == DW_TAG_class_type |
16198 | || part_die->tag == DW_TAG_interface_type | |
16199 | || part_die->tag == DW_TAG_structure_type | |
16200 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
16201 | && part_die->linkage_name != NULL) |
16202 | { | |
16203 | char *demangled; | |
16204 | ||
8de20a37 | 16205 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
16206 | if (demangled) |
16207 | { | |
96408a79 SA |
16208 | const char *base; |
16209 | ||
16210 | /* Strip any leading namespaces/classes, keep only the base name. | |
16211 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16212 | base = strrchr (demangled, ':'); | |
16213 | if (base && base > demangled && base[-1] == ':') | |
16214 | base++; | |
16215 | else | |
16216 | base = demangled; | |
16217 | ||
34a68019 | 16218 | part_die->name |
224c3ddb SM |
16219 | = ((const char *) |
16220 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16221 | base, strlen (base))); | |
53832f31 TT |
16222 | xfree (demangled); |
16223 | } | |
16224 | } | |
16225 | ||
abc72ce4 | 16226 | part_die->fixup_called = 1; |
72bf9492 DJ |
16227 | } |
16228 | ||
a8329558 | 16229 | /* Read an attribute value described by an attribute form. */ |
c906108c | 16230 | |
d521ce57 | 16231 | static const gdb_byte * |
dee91e82 DE |
16232 | read_attribute_value (const struct die_reader_specs *reader, |
16233 | struct attribute *attr, unsigned form, | |
d521ce57 | 16234 | const gdb_byte *info_ptr) |
c906108c | 16235 | { |
dee91e82 | 16236 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
16237 | struct objfile *objfile = cu->objfile; |
16238 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 16239 | bfd *abfd = reader->abfd; |
e7c27a73 | 16240 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16241 | unsigned int bytes_read; |
16242 | struct dwarf_block *blk; | |
16243 | ||
aead7601 | 16244 | attr->form = (enum dwarf_form) form; |
a8329558 | 16245 | switch (form) |
c906108c | 16246 | { |
c906108c | 16247 | case DW_FORM_ref_addr: |
ae411497 | 16248 | if (cu->header.version == 2) |
4568ecf9 | 16249 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 16250 | else |
4568ecf9 DE |
16251 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
16252 | &cu->header, &bytes_read); | |
ae411497 TT |
16253 | info_ptr += bytes_read; |
16254 | break; | |
36586728 TT |
16255 | case DW_FORM_GNU_ref_alt: |
16256 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16257 | info_ptr += bytes_read; | |
16258 | break; | |
ae411497 | 16259 | case DW_FORM_addr: |
e7c27a73 | 16260 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 16261 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 16262 | info_ptr += bytes_read; |
c906108c SS |
16263 | break; |
16264 | case DW_FORM_block2: | |
7b5a2f43 | 16265 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16266 | blk->size = read_2_bytes (abfd, info_ptr); |
16267 | info_ptr += 2; | |
16268 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16269 | info_ptr += blk->size; | |
16270 | DW_BLOCK (attr) = blk; | |
16271 | break; | |
16272 | case DW_FORM_block4: | |
7b5a2f43 | 16273 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16274 | blk->size = read_4_bytes (abfd, info_ptr); |
16275 | info_ptr += 4; | |
16276 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16277 | info_ptr += blk->size; | |
16278 | DW_BLOCK (attr) = blk; | |
16279 | break; | |
16280 | case DW_FORM_data2: | |
16281 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
16282 | info_ptr += 2; | |
16283 | break; | |
16284 | case DW_FORM_data4: | |
16285 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
16286 | info_ptr += 4; | |
16287 | break; | |
16288 | case DW_FORM_data8: | |
16289 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
16290 | info_ptr += 8; | |
16291 | break; | |
2dc7f7b3 TT |
16292 | case DW_FORM_sec_offset: |
16293 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16294 | info_ptr += bytes_read; | |
16295 | break; | |
c906108c | 16296 | case DW_FORM_string: |
9b1c24c8 | 16297 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 16298 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
16299 | info_ptr += bytes_read; |
16300 | break; | |
4bdf3d34 | 16301 | case DW_FORM_strp: |
36586728 TT |
16302 | if (!cu->per_cu->is_dwz) |
16303 | { | |
16304 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
16305 | &bytes_read); | |
16306 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16307 | info_ptr += bytes_read; | |
16308 | break; | |
16309 | } | |
16310 | /* FALLTHROUGH */ | |
16311 | case DW_FORM_GNU_strp_alt: | |
16312 | { | |
16313 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16314 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16315 | &bytes_read); | |
16316 | ||
16317 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16318 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16319 | info_ptr += bytes_read; | |
16320 | } | |
4bdf3d34 | 16321 | break; |
2dc7f7b3 | 16322 | case DW_FORM_exprloc: |
c906108c | 16323 | case DW_FORM_block: |
7b5a2f43 | 16324 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16325 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16326 | info_ptr += bytes_read; | |
16327 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16328 | info_ptr += blk->size; | |
16329 | DW_BLOCK (attr) = blk; | |
16330 | break; | |
16331 | case DW_FORM_block1: | |
7b5a2f43 | 16332 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16333 | blk->size = read_1_byte (abfd, info_ptr); |
16334 | info_ptr += 1; | |
16335 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16336 | info_ptr += blk->size; | |
16337 | DW_BLOCK (attr) = blk; | |
16338 | break; | |
16339 | case DW_FORM_data1: | |
16340 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16341 | info_ptr += 1; | |
16342 | break; | |
16343 | case DW_FORM_flag: | |
16344 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16345 | info_ptr += 1; | |
16346 | break; | |
2dc7f7b3 TT |
16347 | case DW_FORM_flag_present: |
16348 | DW_UNSND (attr) = 1; | |
16349 | break; | |
c906108c SS |
16350 | case DW_FORM_sdata: |
16351 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16352 | info_ptr += bytes_read; | |
16353 | break; | |
16354 | case DW_FORM_udata: | |
16355 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16356 | info_ptr += bytes_read; | |
16357 | break; | |
16358 | case DW_FORM_ref1: | |
4568ecf9 DE |
16359 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16360 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
16361 | info_ptr += 1; |
16362 | break; | |
16363 | case DW_FORM_ref2: | |
4568ecf9 DE |
16364 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16365 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
16366 | info_ptr += 2; |
16367 | break; | |
16368 | case DW_FORM_ref4: | |
4568ecf9 DE |
16369 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16370 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
16371 | info_ptr += 4; |
16372 | break; | |
613e1657 | 16373 | case DW_FORM_ref8: |
4568ecf9 DE |
16374 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16375 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
16376 | info_ptr += 8; |
16377 | break; | |
55f1336d | 16378 | case DW_FORM_ref_sig8: |
ac9ec31b | 16379 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16380 | info_ptr += 8; |
16381 | break; | |
c906108c | 16382 | case DW_FORM_ref_udata: |
4568ecf9 DE |
16383 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16384 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
16385 | info_ptr += bytes_read; |
16386 | break; | |
c906108c | 16387 | case DW_FORM_indirect: |
a8329558 KW |
16388 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16389 | info_ptr += bytes_read; | |
dee91e82 | 16390 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 16391 | break; |
3019eac3 DE |
16392 | case DW_FORM_GNU_addr_index: |
16393 | if (reader->dwo_file == NULL) | |
16394 | { | |
16395 | /* For now flag a hard error. | |
16396 | Later we can turn this into a complaint. */ | |
16397 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16398 | dwarf_form_name (form), | |
16399 | bfd_get_filename (abfd)); | |
16400 | } | |
16401 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16402 | info_ptr += bytes_read; | |
16403 | break; | |
16404 | case DW_FORM_GNU_str_index: | |
16405 | if (reader->dwo_file == NULL) | |
16406 | { | |
16407 | /* For now flag a hard error. | |
16408 | Later we can turn this into a complaint if warranted. */ | |
16409 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16410 | dwarf_form_name (form), | |
16411 | bfd_get_filename (abfd)); | |
16412 | } | |
16413 | { | |
16414 | ULONGEST str_index = | |
16415 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16416 | ||
342587c4 | 16417 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16418 | DW_STRING_IS_CANONICAL (attr) = 0; |
16419 | info_ptr += bytes_read; | |
16420 | } | |
16421 | break; | |
c906108c | 16422 | default: |
8a3fe4f8 | 16423 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16424 | dwarf_form_name (form), |
16425 | bfd_get_filename (abfd)); | |
c906108c | 16426 | } |
28e94949 | 16427 | |
36586728 | 16428 | /* Super hack. */ |
7771576e | 16429 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16430 | attr->form = DW_FORM_GNU_ref_alt; |
16431 | ||
28e94949 JB |
16432 | /* We have seen instances where the compiler tried to emit a byte |
16433 | size attribute of -1 which ended up being encoded as an unsigned | |
16434 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16435 | an object of this size seems pretty unlikely so we can relatively | |
16436 | safely treat these cases as if the size attribute was invalid and | |
16437 | treat them as zero by default. */ | |
16438 | if (attr->name == DW_AT_byte_size | |
16439 | && form == DW_FORM_data4 | |
16440 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16441 | { |
16442 | complaint | |
16443 | (&symfile_complaints, | |
43bbcdc2 PH |
16444 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
16445 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
16446 | DW_UNSND (attr) = 0; |
16447 | } | |
28e94949 | 16448 | |
c906108c SS |
16449 | return info_ptr; |
16450 | } | |
16451 | ||
a8329558 KW |
16452 | /* Read an attribute described by an abbreviated attribute. */ |
16453 | ||
d521ce57 | 16454 | static const gdb_byte * |
dee91e82 DE |
16455 | read_attribute (const struct die_reader_specs *reader, |
16456 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 16457 | const gdb_byte *info_ptr) |
a8329558 KW |
16458 | { |
16459 | attr->name = abbrev->name; | |
dee91e82 | 16460 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
16461 | } |
16462 | ||
0963b4bd | 16463 | /* Read dwarf information from a buffer. */ |
c906108c SS |
16464 | |
16465 | static unsigned int | |
a1855c1d | 16466 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16467 | { |
fe1b8b76 | 16468 | return bfd_get_8 (abfd, buf); |
c906108c SS |
16469 | } |
16470 | ||
16471 | static int | |
a1855c1d | 16472 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16473 | { |
fe1b8b76 | 16474 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
16475 | } |
16476 | ||
16477 | static unsigned int | |
a1855c1d | 16478 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16479 | { |
fe1b8b76 | 16480 | return bfd_get_16 (abfd, buf); |
c906108c SS |
16481 | } |
16482 | ||
21ae7a4d | 16483 | static int |
a1855c1d | 16484 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16485 | { |
16486 | return bfd_get_signed_16 (abfd, buf); | |
16487 | } | |
16488 | ||
c906108c | 16489 | static unsigned int |
a1855c1d | 16490 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16491 | { |
fe1b8b76 | 16492 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16493 | } |
16494 | ||
21ae7a4d | 16495 | static int |
a1855c1d | 16496 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16497 | { |
16498 | return bfd_get_signed_32 (abfd, buf); | |
16499 | } | |
16500 | ||
93311388 | 16501 | static ULONGEST |
a1855c1d | 16502 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16503 | { |
fe1b8b76 | 16504 | return bfd_get_64 (abfd, buf); |
c906108c SS |
16505 | } |
16506 | ||
16507 | static CORE_ADDR | |
d521ce57 | 16508 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 16509 | unsigned int *bytes_read) |
c906108c | 16510 | { |
e7c27a73 | 16511 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16512 | CORE_ADDR retval = 0; |
16513 | ||
107d2387 | 16514 | if (cu_header->signed_addr_p) |
c906108c | 16515 | { |
107d2387 AC |
16516 | switch (cu_header->addr_size) |
16517 | { | |
16518 | case 2: | |
fe1b8b76 | 16519 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
16520 | break; |
16521 | case 4: | |
fe1b8b76 | 16522 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
16523 | break; |
16524 | case 8: | |
fe1b8b76 | 16525 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
16526 | break; |
16527 | default: | |
8e65ff28 | 16528 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 16529 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 16530 | bfd_get_filename (abfd)); |
107d2387 AC |
16531 | } |
16532 | } | |
16533 | else | |
16534 | { | |
16535 | switch (cu_header->addr_size) | |
16536 | { | |
16537 | case 2: | |
fe1b8b76 | 16538 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
16539 | break; |
16540 | case 4: | |
fe1b8b76 | 16541 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
16542 | break; |
16543 | case 8: | |
fe1b8b76 | 16544 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
16545 | break; |
16546 | default: | |
8e65ff28 | 16547 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
16548 | _("read_address: bad switch, " |
16549 | "unsigned [in module %s]"), | |
659b0389 | 16550 | bfd_get_filename (abfd)); |
107d2387 | 16551 | } |
c906108c | 16552 | } |
64367e0a | 16553 | |
107d2387 AC |
16554 | *bytes_read = cu_header->addr_size; |
16555 | return retval; | |
c906108c SS |
16556 | } |
16557 | ||
f7ef9339 | 16558 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
16559 | specification allows the initial length to take up either 4 bytes |
16560 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
16561 | bytes describe the length and all offsets will be 8 bytes in length | |
16562 | instead of 4. | |
16563 | ||
f7ef9339 KB |
16564 | An older, non-standard 64-bit format is also handled by this |
16565 | function. The older format in question stores the initial length | |
16566 | as an 8-byte quantity without an escape value. Lengths greater | |
16567 | than 2^32 aren't very common which means that the initial 4 bytes | |
16568 | is almost always zero. Since a length value of zero doesn't make | |
16569 | sense for the 32-bit format, this initial zero can be considered to | |
16570 | be an escape value which indicates the presence of the older 64-bit | |
16571 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
16572 | greater than 4GB. If it becomes necessary to handle lengths |
16573 | somewhat larger than 4GB, we could allow other small values (such | |
16574 | as the non-sensical values of 1, 2, and 3) to also be used as | |
16575 | escape values indicating the presence of the old format. | |
f7ef9339 | 16576 | |
917c78fc MK |
16577 | The value returned via bytes_read should be used to increment the |
16578 | relevant pointer after calling read_initial_length(). | |
c764a876 | 16579 | |
613e1657 KB |
16580 | [ Note: read_initial_length() and read_offset() are based on the |
16581 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 16582 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
16583 | from: |
16584 | ||
f7ef9339 | 16585 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 16586 | |
613e1657 KB |
16587 | This document is only a draft and is subject to change. (So beware.) |
16588 | ||
f7ef9339 | 16589 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
16590 | determined empirically by examining 64-bit ELF files produced by |
16591 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
16592 | |
16593 | - Kevin, July 16, 2002 | |
613e1657 KB |
16594 | ] */ |
16595 | ||
16596 | static LONGEST | |
d521ce57 | 16597 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 16598 | { |
fe1b8b76 | 16599 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 16600 | |
dd373385 | 16601 | if (length == 0xffffffff) |
613e1657 | 16602 | { |
fe1b8b76 | 16603 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 16604 | *bytes_read = 12; |
613e1657 | 16605 | } |
dd373385 | 16606 | else if (length == 0) |
f7ef9339 | 16607 | { |
dd373385 | 16608 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 16609 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 16610 | *bytes_read = 8; |
f7ef9339 | 16611 | } |
613e1657 KB |
16612 | else |
16613 | { | |
16614 | *bytes_read = 4; | |
613e1657 KB |
16615 | } |
16616 | ||
c764a876 DE |
16617 | return length; |
16618 | } | |
dd373385 | 16619 | |
c764a876 DE |
16620 | /* Cover function for read_initial_length. |
16621 | Returns the length of the object at BUF, and stores the size of the | |
16622 | initial length in *BYTES_READ and stores the size that offsets will be in | |
16623 | *OFFSET_SIZE. | |
16624 | If the initial length size is not equivalent to that specified in | |
16625 | CU_HEADER then issue a complaint. | |
16626 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 16627 | |
c764a876 | 16628 | static LONGEST |
d521ce57 | 16629 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
16630 | const struct comp_unit_head *cu_header, |
16631 | unsigned int *bytes_read, | |
16632 | unsigned int *offset_size) | |
16633 | { | |
16634 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
16635 | ||
16636 | gdb_assert (cu_header->initial_length_size == 4 | |
16637 | || cu_header->initial_length_size == 8 | |
16638 | || cu_header->initial_length_size == 12); | |
16639 | ||
16640 | if (cu_header->initial_length_size != *bytes_read) | |
16641 | complaint (&symfile_complaints, | |
16642 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 16643 | |
c764a876 | 16644 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 16645 | return length; |
613e1657 KB |
16646 | } |
16647 | ||
16648 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 16649 | given by cu_header->offset_size. */ |
613e1657 KB |
16650 | |
16651 | static LONGEST | |
d521ce57 TT |
16652 | read_offset (bfd *abfd, const gdb_byte *buf, |
16653 | const struct comp_unit_head *cu_header, | |
891d2f0b | 16654 | unsigned int *bytes_read) |
c764a876 DE |
16655 | { |
16656 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 16657 | |
c764a876 DE |
16658 | *bytes_read = cu_header->offset_size; |
16659 | return offset; | |
16660 | } | |
16661 | ||
16662 | /* Read an offset from the data stream. */ | |
16663 | ||
16664 | static LONGEST | |
d521ce57 | 16665 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
16666 | { |
16667 | LONGEST retval = 0; | |
16668 | ||
c764a876 | 16669 | switch (offset_size) |
613e1657 KB |
16670 | { |
16671 | case 4: | |
fe1b8b76 | 16672 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
16673 | break; |
16674 | case 8: | |
fe1b8b76 | 16675 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
16676 | break; |
16677 | default: | |
8e65ff28 | 16678 | internal_error (__FILE__, __LINE__, |
c764a876 | 16679 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 16680 | bfd_get_filename (abfd)); |
613e1657 KB |
16681 | } |
16682 | ||
917c78fc | 16683 | return retval; |
613e1657 KB |
16684 | } |
16685 | ||
d521ce57 TT |
16686 | static const gdb_byte * |
16687 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
16688 | { |
16689 | /* If the size of a host char is 8 bits, we can return a pointer | |
16690 | to the buffer, otherwise we have to copy the data to a buffer | |
16691 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16692 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 16693 | return buf; |
c906108c SS |
16694 | } |
16695 | ||
d521ce57 TT |
16696 | static const char * |
16697 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
16698 | unsigned int *bytes_read_ptr) | |
c906108c SS |
16699 | { |
16700 | /* If the size of a host char is 8 bits, we can return a pointer | |
16701 | to the string, otherwise we have to copy the string to a buffer | |
16702 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16703 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
16704 | if (*buf == '\0') |
16705 | { | |
16706 | *bytes_read_ptr = 1; | |
16707 | return NULL; | |
16708 | } | |
d521ce57 TT |
16709 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
16710 | return (const char *) buf; | |
4bdf3d34 JJ |
16711 | } |
16712 | ||
d521ce57 | 16713 | static const char * |
cf2c3c16 | 16714 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 16715 | { |
be391dca | 16716 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 16717 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
16718 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
16719 | bfd_get_filename (abfd)); | |
dce234bc | 16720 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
16721 | error (_("DW_FORM_strp pointing outside of " |
16722 | ".debug_str section [in module %s]"), | |
16723 | bfd_get_filename (abfd)); | |
4bdf3d34 | 16724 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 16725 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 16726 | return NULL; |
d521ce57 | 16727 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
16728 | } |
16729 | ||
36586728 TT |
16730 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
16731 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
16732 | the string consists of a single NUL byte, return NULL; otherwise | |
16733 | return a pointer to the string. */ | |
16734 | ||
d521ce57 | 16735 | static const char * |
36586728 TT |
16736 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
16737 | { | |
16738 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
16739 | ||
16740 | if (dwz->str.buffer == NULL) | |
16741 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
16742 | "section [in module %s]"), | |
16743 | bfd_get_filename (dwz->dwz_bfd)); | |
16744 | if (str_offset >= dwz->str.size) | |
16745 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
16746 | ".debug_str section [in module %s]"), | |
16747 | bfd_get_filename (dwz->dwz_bfd)); | |
16748 | gdb_assert (HOST_CHAR_BIT == 8); | |
16749 | if (dwz->str.buffer[str_offset] == '\0') | |
16750 | return NULL; | |
d521ce57 | 16751 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
16752 | } |
16753 | ||
d521ce57 TT |
16754 | static const char * |
16755 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
16756 | const struct comp_unit_head *cu_header, |
16757 | unsigned int *bytes_read_ptr) | |
16758 | { | |
16759 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
16760 | ||
16761 | return read_indirect_string_at_offset (abfd, str_offset); | |
16762 | } | |
16763 | ||
12df843f | 16764 | static ULONGEST |
d521ce57 TT |
16765 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
16766 | unsigned int *bytes_read_ptr) | |
c906108c | 16767 | { |
12df843f | 16768 | ULONGEST result; |
ce5d95e1 | 16769 | unsigned int num_read; |
c906108c SS |
16770 | int i, shift; |
16771 | unsigned char byte; | |
16772 | ||
16773 | result = 0; | |
16774 | shift = 0; | |
16775 | num_read = 0; | |
16776 | i = 0; | |
16777 | while (1) | |
16778 | { | |
fe1b8b76 | 16779 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16780 | buf++; |
16781 | num_read++; | |
12df843f | 16782 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
16783 | if ((byte & 128) == 0) |
16784 | { | |
16785 | break; | |
16786 | } | |
16787 | shift += 7; | |
16788 | } | |
16789 | *bytes_read_ptr = num_read; | |
16790 | return result; | |
16791 | } | |
16792 | ||
12df843f | 16793 | static LONGEST |
d521ce57 TT |
16794 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
16795 | unsigned int *bytes_read_ptr) | |
c906108c | 16796 | { |
12df843f | 16797 | LONGEST result; |
77e0b926 | 16798 | int i, shift, num_read; |
c906108c SS |
16799 | unsigned char byte; |
16800 | ||
16801 | result = 0; | |
16802 | shift = 0; | |
c906108c SS |
16803 | num_read = 0; |
16804 | i = 0; | |
16805 | while (1) | |
16806 | { | |
fe1b8b76 | 16807 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16808 | buf++; |
16809 | num_read++; | |
12df843f | 16810 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
16811 | shift += 7; |
16812 | if ((byte & 128) == 0) | |
16813 | { | |
16814 | break; | |
16815 | } | |
16816 | } | |
77e0b926 | 16817 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 16818 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
16819 | *bytes_read_ptr = num_read; |
16820 | return result; | |
16821 | } | |
16822 | ||
3019eac3 DE |
16823 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
16824 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
16825 | ADDR_SIZE is the size of addresses from the CU header. */ | |
16826 | ||
16827 | static CORE_ADDR | |
16828 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
16829 | { | |
16830 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16831 | bfd *abfd = objfile->obfd; | |
16832 | const gdb_byte *info_ptr; | |
16833 | ||
16834 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
16835 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
16836 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 16837 | objfile_name (objfile)); |
3019eac3 DE |
16838 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
16839 | error (_("DW_FORM_addr_index pointing outside of " | |
16840 | ".debug_addr section [in module %s]"), | |
4262abfb | 16841 | objfile_name (objfile)); |
3019eac3 DE |
16842 | info_ptr = (dwarf2_per_objfile->addr.buffer |
16843 | + addr_base + addr_index * addr_size); | |
16844 | if (addr_size == 4) | |
16845 | return bfd_get_32 (abfd, info_ptr); | |
16846 | else | |
16847 | return bfd_get_64 (abfd, info_ptr); | |
16848 | } | |
16849 | ||
16850 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
16851 | ||
16852 | static CORE_ADDR | |
16853 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
16854 | { | |
16855 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
16856 | } | |
16857 | ||
16858 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
16859 | ||
16860 | static CORE_ADDR | |
d521ce57 | 16861 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
16862 | unsigned int *bytes_read) |
16863 | { | |
16864 | bfd *abfd = cu->objfile->obfd; | |
16865 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
16866 | ||
16867 | return read_addr_index (cu, addr_index); | |
16868 | } | |
16869 | ||
16870 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
16871 | back to dwarf2_read_addr_index. */ | |
16872 | ||
16873 | struct dwarf2_read_addr_index_data | |
16874 | { | |
16875 | ULONGEST addr_base; | |
16876 | int addr_size; | |
16877 | }; | |
16878 | ||
16879 | /* die_reader_func for dwarf2_read_addr_index. */ | |
16880 | ||
16881 | static void | |
16882 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 16883 | const gdb_byte *info_ptr, |
3019eac3 DE |
16884 | struct die_info *comp_unit_die, |
16885 | int has_children, | |
16886 | void *data) | |
16887 | { | |
16888 | struct dwarf2_cu *cu = reader->cu; | |
16889 | struct dwarf2_read_addr_index_data *aidata = | |
16890 | (struct dwarf2_read_addr_index_data *) data; | |
16891 | ||
16892 | aidata->addr_base = cu->addr_base; | |
16893 | aidata->addr_size = cu->header.addr_size; | |
16894 | } | |
16895 | ||
16896 | /* Given an index in .debug_addr, fetch the value. | |
16897 | NOTE: This can be called during dwarf expression evaluation, | |
16898 | long after the debug information has been read, and thus per_cu->cu | |
16899 | may no longer exist. */ | |
16900 | ||
16901 | CORE_ADDR | |
16902 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
16903 | unsigned int addr_index) | |
16904 | { | |
16905 | struct objfile *objfile = per_cu->objfile; | |
16906 | struct dwarf2_cu *cu = per_cu->cu; | |
16907 | ULONGEST addr_base; | |
16908 | int addr_size; | |
16909 | ||
16910 | /* This is intended to be called from outside this file. */ | |
16911 | dw2_setup (objfile); | |
16912 | ||
16913 | /* We need addr_base and addr_size. | |
16914 | If we don't have PER_CU->cu, we have to get it. | |
16915 | Nasty, but the alternative is storing the needed info in PER_CU, | |
16916 | which at this point doesn't seem justified: it's not clear how frequently | |
16917 | it would get used and it would increase the size of every PER_CU. | |
16918 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
16919 | so we're not in uncharted territory here. | |
16920 | Alas we need to be a bit more complicated as addr_base is contained | |
16921 | in the DIE. | |
16922 | ||
16923 | We don't need to read the entire CU(/TU). | |
16924 | We just need the header and top level die. | |
a1b64ce1 | 16925 | |
3019eac3 | 16926 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 16927 | For now we skip this optimization. */ |
3019eac3 DE |
16928 | |
16929 | if (cu != NULL) | |
16930 | { | |
16931 | addr_base = cu->addr_base; | |
16932 | addr_size = cu->header.addr_size; | |
16933 | } | |
16934 | else | |
16935 | { | |
16936 | struct dwarf2_read_addr_index_data aidata; | |
16937 | ||
a1b64ce1 DE |
16938 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
16939 | we need addr_base. */ | |
16940 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
16941 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
16942 | addr_base = aidata.addr_base; |
16943 | addr_size = aidata.addr_size; | |
16944 | } | |
16945 | ||
16946 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
16947 | } | |
16948 | ||
57d63ce2 DE |
16949 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
16950 | This is only used by the Fission support. */ | |
3019eac3 | 16951 | |
d521ce57 | 16952 | static const char * |
342587c4 | 16953 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
16954 | { |
16955 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 16956 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 16957 | bfd *abfd = objfile->obfd; |
342587c4 | 16958 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
16959 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
16960 | struct dwarf2_section_info *str_offsets_section = | |
16961 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 16962 | const gdb_byte *info_ptr; |
3019eac3 | 16963 | ULONGEST str_offset; |
57d63ce2 | 16964 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 16965 | |
73869dc2 DE |
16966 | dwarf2_read_section (objfile, str_section); |
16967 | dwarf2_read_section (objfile, str_offsets_section); | |
16968 | if (str_section->buffer == NULL) | |
57d63ce2 | 16969 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 16970 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16971 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16972 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 16973 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 16974 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16975 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16976 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 16977 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 16978 | " section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16979 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16980 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
16981 | + str_index * cu->header.offset_size); |
16982 | if (cu->header.offset_size == 4) | |
16983 | str_offset = bfd_get_32 (abfd, info_ptr); | |
16984 | else | |
16985 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 16986 | if (str_offset >= str_section->size) |
57d63ce2 | 16987 | error (_("Offset from %s pointing outside of" |
3019eac3 | 16988 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16989 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16990 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
16991 | } |
16992 | ||
3019eac3 DE |
16993 | /* Return the length of an LEB128 number in BUF. */ |
16994 | ||
16995 | static int | |
16996 | leb128_size (const gdb_byte *buf) | |
16997 | { | |
16998 | const gdb_byte *begin = buf; | |
16999 | gdb_byte byte; | |
17000 | ||
17001 | while (1) | |
17002 | { | |
17003 | byte = *buf++; | |
17004 | if ((byte & 128) == 0) | |
17005 | return buf - begin; | |
17006 | } | |
17007 | } | |
17008 | ||
c906108c | 17009 | static void |
e142c38c | 17010 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
17011 | { |
17012 | switch (lang) | |
17013 | { | |
17014 | case DW_LANG_C89: | |
76bee0cc | 17015 | case DW_LANG_C99: |
0cfd832f | 17016 | case DW_LANG_C11: |
c906108c | 17017 | case DW_LANG_C: |
d1be3247 | 17018 | case DW_LANG_UPC: |
e142c38c | 17019 | cu->language = language_c; |
c906108c SS |
17020 | break; |
17021 | case DW_LANG_C_plus_plus: | |
0cfd832f MW |
17022 | case DW_LANG_C_plus_plus_11: |
17023 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 17024 | cu->language = language_cplus; |
c906108c | 17025 | break; |
6aecb9c2 JB |
17026 | case DW_LANG_D: |
17027 | cu->language = language_d; | |
17028 | break; | |
c906108c SS |
17029 | case DW_LANG_Fortran77: |
17030 | case DW_LANG_Fortran90: | |
b21b22e0 | 17031 | case DW_LANG_Fortran95: |
f7de9aab MW |
17032 | case DW_LANG_Fortran03: |
17033 | case DW_LANG_Fortran08: | |
e142c38c | 17034 | cu->language = language_fortran; |
c906108c | 17035 | break; |
a766d390 DE |
17036 | case DW_LANG_Go: |
17037 | cu->language = language_go; | |
17038 | break; | |
c906108c | 17039 | case DW_LANG_Mips_Assembler: |
e142c38c | 17040 | cu->language = language_asm; |
c906108c | 17041 | break; |
bebd888e | 17042 | case DW_LANG_Java: |
e142c38c | 17043 | cu->language = language_java; |
bebd888e | 17044 | break; |
c906108c | 17045 | case DW_LANG_Ada83: |
8aaf0b47 | 17046 | case DW_LANG_Ada95: |
bc5f45f8 JB |
17047 | cu->language = language_ada; |
17048 | break; | |
72019c9c GM |
17049 | case DW_LANG_Modula2: |
17050 | cu->language = language_m2; | |
17051 | break; | |
fe8e67fd PM |
17052 | case DW_LANG_Pascal83: |
17053 | cu->language = language_pascal; | |
17054 | break; | |
22566fbd DJ |
17055 | case DW_LANG_ObjC: |
17056 | cu->language = language_objc; | |
17057 | break; | |
c906108c SS |
17058 | case DW_LANG_Cobol74: |
17059 | case DW_LANG_Cobol85: | |
c906108c | 17060 | default: |
e142c38c | 17061 | cu->language = language_minimal; |
c906108c SS |
17062 | break; |
17063 | } | |
e142c38c | 17064 | cu->language_defn = language_def (cu->language); |
c906108c SS |
17065 | } |
17066 | ||
17067 | /* Return the named attribute or NULL if not there. */ | |
17068 | ||
17069 | static struct attribute * | |
e142c38c | 17070 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 17071 | { |
a48e046c | 17072 | for (;;) |
c906108c | 17073 | { |
a48e046c TT |
17074 | unsigned int i; |
17075 | struct attribute *spec = NULL; | |
17076 | ||
17077 | for (i = 0; i < die->num_attrs; ++i) | |
17078 | { | |
17079 | if (die->attrs[i].name == name) | |
17080 | return &die->attrs[i]; | |
17081 | if (die->attrs[i].name == DW_AT_specification | |
17082 | || die->attrs[i].name == DW_AT_abstract_origin) | |
17083 | spec = &die->attrs[i]; | |
17084 | } | |
17085 | ||
17086 | if (!spec) | |
17087 | break; | |
c906108c | 17088 | |
f2f0e013 | 17089 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 17090 | } |
c5aa993b | 17091 | |
c906108c SS |
17092 | return NULL; |
17093 | } | |
17094 | ||
348e048f DE |
17095 | /* Return the named attribute or NULL if not there, |
17096 | but do not follow DW_AT_specification, etc. | |
17097 | This is for use in contexts where we're reading .debug_types dies. | |
17098 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
17099 | back up the chain, and we want to go down. */ | |
17100 | ||
17101 | static struct attribute * | |
45e58e77 | 17102 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
17103 | { |
17104 | unsigned int i; | |
17105 | ||
17106 | for (i = 0; i < die->num_attrs; ++i) | |
17107 | if (die->attrs[i].name == name) | |
17108 | return &die->attrs[i]; | |
17109 | ||
17110 | return NULL; | |
17111 | } | |
17112 | ||
7d45c7c3 KB |
17113 | /* Return the string associated with a string-typed attribute, or NULL if it |
17114 | is either not found or is of an incorrect type. */ | |
17115 | ||
17116 | static const char * | |
17117 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
17118 | { | |
17119 | struct attribute *attr; | |
17120 | const char *str = NULL; | |
17121 | ||
17122 | attr = dwarf2_attr (die, name, cu); | |
17123 | ||
17124 | if (attr != NULL) | |
17125 | { | |
17126 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_string | |
17127 | || attr->form == DW_FORM_GNU_strp_alt) | |
17128 | str = DW_STRING (attr); | |
17129 | else | |
17130 | complaint (&symfile_complaints, | |
17131 | _("string type expected for attribute %s for " | |
17132 | "DIE at 0x%x in module %s"), | |
17133 | dwarf_attr_name (name), die->offset.sect_off, | |
17134 | objfile_name (cu->objfile)); | |
17135 | } | |
17136 | ||
17137 | return str; | |
17138 | } | |
17139 | ||
05cf31d1 JB |
17140 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
17141 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 17142 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
17143 | |
17144 | static int | |
17145 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
17146 | { | |
17147 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
17148 | ||
17149 | return (attr && DW_UNSND (attr)); | |
17150 | } | |
17151 | ||
3ca72b44 | 17152 | static int |
e142c38c | 17153 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 17154 | { |
05cf31d1 JB |
17155 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
17156 | which value is non-zero. However, we have to be careful with | |
17157 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
17158 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
17159 | end up accidently finding a declaration attribute that belongs | |
17160 | to a different DIE referenced by the specification attribute, | |
17161 | even though the given DIE does not have a declaration attribute. */ | |
17162 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
17163 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
17164 | } |
17165 | ||
63d06c5c | 17166 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 17167 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
17168 | containing the return value on output. If there is no |
17169 | specification, but there is an abstract origin, that is | |
17170 | returned. */ | |
63d06c5c DC |
17171 | |
17172 | static struct die_info * | |
f2f0e013 | 17173 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 17174 | { |
f2f0e013 DJ |
17175 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
17176 | *spec_cu); | |
63d06c5c | 17177 | |
edb3359d DJ |
17178 | if (spec_attr == NULL) |
17179 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
17180 | ||
63d06c5c DC |
17181 | if (spec_attr == NULL) |
17182 | return NULL; | |
17183 | else | |
f2f0e013 | 17184 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 17185 | } |
c906108c | 17186 | |
debd256d | 17187 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
17188 | refers to. |
17189 | NOTE: This is also used as a "cleanup" function. */ | |
17190 | ||
debd256d JB |
17191 | static void |
17192 | free_line_header (struct line_header *lh) | |
17193 | { | |
17194 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 17195 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
17196 | |
17197 | /* Remember that all the lh->file_names[i].name pointers are | |
17198 | pointers into debug_line_buffer, and don't need to be freed. */ | |
17199 | if (lh->file_names) | |
a8bc7b56 | 17200 | xfree (lh->file_names); |
debd256d JB |
17201 | |
17202 | /* Similarly for the include directory names. */ | |
17203 | if (lh->include_dirs) | |
a8bc7b56 | 17204 | xfree (lh->include_dirs); |
debd256d | 17205 | |
a8bc7b56 | 17206 | xfree (lh); |
debd256d JB |
17207 | } |
17208 | ||
527f3840 JK |
17209 | /* Stub for free_line_header to match void * callback types. */ |
17210 | ||
17211 | static void | |
17212 | free_line_header_voidp (void *arg) | |
17213 | { | |
9a3c8263 | 17214 | struct line_header *lh = (struct line_header *) arg; |
527f3840 JK |
17215 | |
17216 | free_line_header (lh); | |
17217 | } | |
17218 | ||
debd256d | 17219 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 17220 | |
debd256d | 17221 | static void |
d521ce57 | 17222 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 17223 | { |
27e0867f DE |
17224 | if (dwarf_line_debug >= 2) |
17225 | fprintf_unfiltered (gdb_stdlog, "Adding dir %u: %s\n", | |
17226 | lh->num_include_dirs + 1, include_dir); | |
17227 | ||
debd256d JB |
17228 | /* Grow the array if necessary. */ |
17229 | if (lh->include_dirs_size == 0) | |
c5aa993b | 17230 | { |
debd256d | 17231 | lh->include_dirs_size = 1; /* for testing */ |
8d749320 | 17232 | lh->include_dirs = XNEWVEC (const char *, lh->include_dirs_size); |
debd256d JB |
17233 | } |
17234 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
17235 | { | |
17236 | lh->include_dirs_size *= 2; | |
8d749320 SM |
17237 | lh->include_dirs = XRESIZEVEC (const char *, lh->include_dirs, |
17238 | lh->include_dirs_size); | |
c5aa993b | 17239 | } |
c906108c | 17240 | |
debd256d JB |
17241 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
17242 | } | |
6e70227d | 17243 | |
debd256d | 17244 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 17245 | |
debd256d JB |
17246 | static void |
17247 | add_file_name (struct line_header *lh, | |
d521ce57 | 17248 | const char *name, |
debd256d JB |
17249 | unsigned int dir_index, |
17250 | unsigned int mod_time, | |
17251 | unsigned int length) | |
17252 | { | |
17253 | struct file_entry *fe; | |
17254 | ||
27e0867f DE |
17255 | if (dwarf_line_debug >= 2) |
17256 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
17257 | lh->num_file_names + 1, name); | |
17258 | ||
debd256d JB |
17259 | /* Grow the array if necessary. */ |
17260 | if (lh->file_names_size == 0) | |
17261 | { | |
17262 | lh->file_names_size = 1; /* for testing */ | |
8d749320 | 17263 | lh->file_names = XNEWVEC (struct file_entry, lh->file_names_size); |
debd256d JB |
17264 | } |
17265 | else if (lh->num_file_names >= lh->file_names_size) | |
17266 | { | |
17267 | lh->file_names_size *= 2; | |
224c3ddb SM |
17268 | lh->file_names |
17269 | = XRESIZEVEC (struct file_entry, lh->file_names, lh->file_names_size); | |
debd256d JB |
17270 | } |
17271 | ||
17272 | fe = &lh->file_names[lh->num_file_names++]; | |
17273 | fe->name = name; | |
17274 | fe->dir_index = dir_index; | |
17275 | fe->mod_time = mod_time; | |
17276 | fe->length = length; | |
aaa75496 | 17277 | fe->included_p = 0; |
cb1df416 | 17278 | fe->symtab = NULL; |
debd256d | 17279 | } |
6e70227d | 17280 | |
83769d0b | 17281 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
17282 | |
17283 | static struct dwarf2_section_info * | |
17284 | get_debug_line_section (struct dwarf2_cu *cu) | |
17285 | { | |
17286 | struct dwarf2_section_info *section; | |
17287 | ||
17288 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
17289 | DWO file. */ | |
17290 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
17291 | section = &cu->dwo_unit->dwo_file->sections.line; | |
17292 | else if (cu->per_cu->is_dwz) | |
17293 | { | |
17294 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17295 | ||
17296 | section = &dwz->line; | |
17297 | } | |
17298 | else | |
17299 | section = &dwarf2_per_objfile->line; | |
17300 | ||
17301 | return section; | |
17302 | } | |
17303 | ||
debd256d | 17304 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 17305 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 17306 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
17307 | Returns NULL if there is a problem reading the header, e.g., if it |
17308 | has a version we don't understand. | |
debd256d JB |
17309 | |
17310 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
17311 | the returned object point into the dwarf line section buffer, |
17312 | and must not be freed. */ | |
ae2de4f8 | 17313 | |
debd256d | 17314 | static struct line_header * |
3019eac3 | 17315 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
17316 | { |
17317 | struct cleanup *back_to; | |
17318 | struct line_header *lh; | |
d521ce57 | 17319 | const gdb_byte *line_ptr; |
c764a876 | 17320 | unsigned int bytes_read, offset_size; |
debd256d | 17321 | int i; |
d521ce57 | 17322 | const char *cur_dir, *cur_file; |
3019eac3 DE |
17323 | struct dwarf2_section_info *section; |
17324 | bfd *abfd; | |
17325 | ||
36586728 | 17326 | section = get_debug_line_section (cu); |
3019eac3 DE |
17327 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
17328 | if (section->buffer == NULL) | |
debd256d | 17329 | { |
3019eac3 DE |
17330 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
17331 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
17332 | else | |
17333 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
17334 | return 0; |
17335 | } | |
17336 | ||
fceca515 DE |
17337 | /* We can't do this until we know the section is non-empty. |
17338 | Only then do we know we have such a section. */ | |
a32a8923 | 17339 | abfd = get_section_bfd_owner (section); |
fceca515 | 17340 | |
a738430d MK |
17341 | /* Make sure that at least there's room for the total_length field. |
17342 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 17343 | if (offset + 4 >= section->size) |
debd256d | 17344 | { |
4d3c2250 | 17345 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
17346 | return 0; |
17347 | } | |
17348 | ||
8d749320 | 17349 | lh = XNEW (struct line_header); |
debd256d JB |
17350 | memset (lh, 0, sizeof (*lh)); |
17351 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
17352 | (void *) lh); | |
17353 | ||
527f3840 JK |
17354 | lh->offset.sect_off = offset; |
17355 | lh->offset_in_dwz = cu->per_cu->is_dwz; | |
17356 | ||
3019eac3 | 17357 | line_ptr = section->buffer + offset; |
debd256d | 17358 | |
a738430d | 17359 | /* Read in the header. */ |
6e70227d | 17360 | lh->total_length = |
c764a876 DE |
17361 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
17362 | &bytes_read, &offset_size); | |
debd256d | 17363 | line_ptr += bytes_read; |
3019eac3 | 17364 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 17365 | { |
4d3c2250 | 17366 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 17367 | do_cleanups (back_to); |
debd256d JB |
17368 | return 0; |
17369 | } | |
17370 | lh->statement_program_end = line_ptr + lh->total_length; | |
17371 | lh->version = read_2_bytes (abfd, line_ptr); | |
17372 | line_ptr += 2; | |
cd366ee8 DE |
17373 | if (lh->version > 4) |
17374 | { | |
17375 | /* This is a version we don't understand. The format could have | |
17376 | changed in ways we don't handle properly so just punt. */ | |
17377 | complaint (&symfile_complaints, | |
17378 | _("unsupported version in .debug_line section")); | |
17379 | return NULL; | |
17380 | } | |
c764a876 DE |
17381 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
17382 | line_ptr += offset_size; | |
debd256d JB |
17383 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
17384 | line_ptr += 1; | |
2dc7f7b3 TT |
17385 | if (lh->version >= 4) |
17386 | { | |
17387 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
17388 | line_ptr += 1; | |
17389 | } | |
17390 | else | |
17391 | lh->maximum_ops_per_instruction = 1; | |
17392 | ||
17393 | if (lh->maximum_ops_per_instruction == 0) | |
17394 | { | |
17395 | lh->maximum_ops_per_instruction = 1; | |
17396 | complaint (&symfile_complaints, | |
3e43a32a MS |
17397 | _("invalid maximum_ops_per_instruction " |
17398 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
17399 | } |
17400 | ||
debd256d JB |
17401 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
17402 | line_ptr += 1; | |
17403 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
17404 | line_ptr += 1; | |
17405 | lh->line_range = read_1_byte (abfd, line_ptr); | |
17406 | line_ptr += 1; | |
17407 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
17408 | line_ptr += 1; | |
8d749320 | 17409 | lh->standard_opcode_lengths = XNEWVEC (unsigned char, lh->opcode_base); |
debd256d JB |
17410 | |
17411 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
17412 | for (i = 1; i < lh->opcode_base; ++i) | |
17413 | { | |
17414 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
17415 | line_ptr += 1; | |
17416 | } | |
17417 | ||
a738430d | 17418 | /* Read directory table. */ |
9b1c24c8 | 17419 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17420 | { |
17421 | line_ptr += bytes_read; | |
17422 | add_include_dir (lh, cur_dir); | |
17423 | } | |
17424 | line_ptr += bytes_read; | |
17425 | ||
a738430d | 17426 | /* Read file name table. */ |
9b1c24c8 | 17427 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17428 | { |
17429 | unsigned int dir_index, mod_time, length; | |
17430 | ||
17431 | line_ptr += bytes_read; | |
17432 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17433 | line_ptr += bytes_read; | |
17434 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17435 | line_ptr += bytes_read; | |
17436 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17437 | line_ptr += bytes_read; | |
17438 | ||
17439 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17440 | } | |
17441 | line_ptr += bytes_read; | |
6e70227d | 17442 | lh->statement_program_start = line_ptr; |
debd256d | 17443 | |
3019eac3 | 17444 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 17445 | complaint (&symfile_complaints, |
3e43a32a MS |
17446 | _("line number info header doesn't " |
17447 | "fit in `.debug_line' section")); | |
debd256d JB |
17448 | |
17449 | discard_cleanups (back_to); | |
17450 | return lh; | |
17451 | } | |
c906108c | 17452 | |
c6da4cef DE |
17453 | /* Subroutine of dwarf_decode_lines to simplify it. |
17454 | Return the file name of the psymtab for included file FILE_INDEX | |
17455 | in line header LH of PST. | |
17456 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17457 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
17458 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
17459 | ||
17460 | The function creates dangling cleanup registration. */ | |
c6da4cef | 17461 | |
d521ce57 | 17462 | static const char * |
c6da4cef DE |
17463 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
17464 | const struct partial_symtab *pst, | |
17465 | const char *comp_dir) | |
17466 | { | |
17467 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
17468 | const char *include_name = fe.name; |
17469 | const char *include_name_to_compare = include_name; | |
17470 | const char *dir_name = NULL; | |
72b9f47f TT |
17471 | const char *pst_filename; |
17472 | char *copied_name = NULL; | |
c6da4cef DE |
17473 | int file_is_pst; |
17474 | ||
afa6c9ab | 17475 | if (fe.dir_index && lh->include_dirs != NULL) |
c6da4cef DE |
17476 | dir_name = lh->include_dirs[fe.dir_index - 1]; |
17477 | ||
17478 | if (!IS_ABSOLUTE_PATH (include_name) | |
17479 | && (dir_name != NULL || comp_dir != NULL)) | |
17480 | { | |
17481 | /* Avoid creating a duplicate psymtab for PST. | |
17482 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
17483 | Before we do the comparison, however, we need to account | |
17484 | for DIR_NAME and COMP_DIR. | |
17485 | First prepend dir_name (if non-NULL). If we still don't | |
17486 | have an absolute path prepend comp_dir (if non-NULL). | |
17487 | However, the directory we record in the include-file's | |
17488 | psymtab does not contain COMP_DIR (to match the | |
17489 | corresponding symtab(s)). | |
17490 | ||
17491 | Example: | |
17492 | ||
17493 | bash$ cd /tmp | |
17494 | bash$ gcc -g ./hello.c | |
17495 | include_name = "hello.c" | |
17496 | dir_name = "." | |
17497 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
17498 | DW_AT_name = "./hello.c" |
17499 | ||
17500 | */ | |
c6da4cef DE |
17501 | |
17502 | if (dir_name != NULL) | |
17503 | { | |
d521ce57 TT |
17504 | char *tem = concat (dir_name, SLASH_STRING, |
17505 | include_name, (char *)NULL); | |
17506 | ||
17507 | make_cleanup (xfree, tem); | |
17508 | include_name = tem; | |
c6da4cef | 17509 | include_name_to_compare = include_name; |
c6da4cef DE |
17510 | } |
17511 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
17512 | { | |
d521ce57 TT |
17513 | char *tem = concat (comp_dir, SLASH_STRING, |
17514 | include_name, (char *)NULL); | |
17515 | ||
17516 | make_cleanup (xfree, tem); | |
17517 | include_name_to_compare = tem; | |
c6da4cef DE |
17518 | } |
17519 | } | |
17520 | ||
17521 | pst_filename = pst->filename; | |
17522 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
17523 | { | |
72b9f47f TT |
17524 | copied_name = concat (pst->dirname, SLASH_STRING, |
17525 | pst_filename, (char *)NULL); | |
17526 | pst_filename = copied_name; | |
c6da4cef DE |
17527 | } |
17528 | ||
1e3fad37 | 17529 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 17530 | |
72b9f47f TT |
17531 | if (copied_name != NULL) |
17532 | xfree (copied_name); | |
c6da4cef DE |
17533 | |
17534 | if (file_is_pst) | |
17535 | return NULL; | |
17536 | return include_name; | |
17537 | } | |
17538 | ||
d9b3de22 DE |
17539 | /* State machine to track the state of the line number program. */ |
17540 | ||
17541 | typedef struct | |
17542 | { | |
17543 | /* These are part of the standard DWARF line number state machine. */ | |
17544 | ||
17545 | unsigned char op_index; | |
17546 | unsigned int file; | |
17547 | unsigned int line; | |
17548 | CORE_ADDR address; | |
17549 | int is_stmt; | |
17550 | unsigned int discriminator; | |
17551 | ||
17552 | /* Additional bits of state we need to track. */ | |
17553 | ||
17554 | /* The last file that we called dwarf2_start_subfile for. | |
17555 | This is only used for TLLs. */ | |
17556 | unsigned int last_file; | |
17557 | /* The last file a line number was recorded for. */ | |
17558 | struct subfile *last_subfile; | |
17559 | ||
17560 | /* The function to call to record a line. */ | |
17561 | record_line_ftype *record_line; | |
17562 | ||
17563 | /* The last line number that was recorded, used to coalesce | |
17564 | consecutive entries for the same line. This can happen, for | |
17565 | example, when discriminators are present. PR 17276. */ | |
17566 | unsigned int last_line; | |
17567 | int line_has_non_zero_discriminator; | |
17568 | } lnp_state_machine; | |
17569 | ||
17570 | /* There's a lot of static state to pass to dwarf_record_line. | |
17571 | This keeps it all together. */ | |
17572 | ||
17573 | typedef struct | |
17574 | { | |
17575 | /* The gdbarch. */ | |
17576 | struct gdbarch *gdbarch; | |
17577 | ||
17578 | /* The line number header. */ | |
17579 | struct line_header *line_header; | |
17580 | ||
17581 | /* Non-zero if we're recording lines. | |
17582 | Otherwise we're building partial symtabs and are just interested in | |
17583 | finding include files mentioned by the line number program. */ | |
17584 | int record_lines_p; | |
17585 | } lnp_reader_state; | |
17586 | ||
c91513d8 PP |
17587 | /* Ignore this record_line request. */ |
17588 | ||
17589 | static void | |
17590 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
17591 | { | |
17592 | return; | |
17593 | } | |
17594 | ||
a05a36a5 DE |
17595 | /* Return non-zero if we should add LINE to the line number table. |
17596 | LINE is the line to add, LAST_LINE is the last line that was added, | |
17597 | LAST_SUBFILE is the subfile for LAST_LINE. | |
17598 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
17599 | had a non-zero discriminator. | |
17600 | ||
17601 | We have to be careful in the presence of discriminators. | |
17602 | E.g., for this line: | |
17603 | ||
17604 | for (i = 0; i < 100000; i++); | |
17605 | ||
17606 | clang can emit four line number entries for that one line, | |
17607 | each with a different discriminator. | |
17608 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
17609 | ||
17610 | However, we want gdb to coalesce all four entries into one. | |
17611 | Otherwise the user could stepi into the middle of the line and | |
17612 | gdb would get confused about whether the pc really was in the | |
17613 | middle of the line. | |
17614 | ||
17615 | Things are further complicated by the fact that two consecutive | |
17616 | line number entries for the same line is a heuristic used by gcc | |
17617 | to denote the end of the prologue. So we can't just discard duplicate | |
17618 | entries, we have to be selective about it. The heuristic we use is | |
17619 | that we only collapse consecutive entries for the same line if at least | |
17620 | one of those entries has a non-zero discriminator. PR 17276. | |
17621 | ||
17622 | Note: Addresses in the line number state machine can never go backwards | |
17623 | within one sequence, thus this coalescing is ok. */ | |
17624 | ||
17625 | static int | |
17626 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
17627 | int line_has_non_zero_discriminator, | |
17628 | struct subfile *last_subfile) | |
17629 | { | |
17630 | if (current_subfile != last_subfile) | |
17631 | return 1; | |
17632 | if (line != last_line) | |
17633 | return 1; | |
17634 | /* Same line for the same file that we've seen already. | |
17635 | As a last check, for pr 17276, only record the line if the line | |
17636 | has never had a non-zero discriminator. */ | |
17637 | if (!line_has_non_zero_discriminator) | |
17638 | return 1; | |
17639 | return 0; | |
17640 | } | |
17641 | ||
252a6764 DE |
17642 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
17643 | in the line table of subfile SUBFILE. */ | |
17644 | ||
17645 | static void | |
d9b3de22 DE |
17646 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
17647 | unsigned int line, CORE_ADDR address, | |
17648 | record_line_ftype p_record_line) | |
252a6764 DE |
17649 | { |
17650 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17651 | ||
27e0867f DE |
17652 | if (dwarf_line_debug) |
17653 | { | |
17654 | fprintf_unfiltered (gdb_stdlog, | |
17655 | "Recording line %u, file %s, address %s\n", | |
17656 | line, lbasename (subfile->name), | |
17657 | paddress (gdbarch, address)); | |
17658 | } | |
17659 | ||
d5962de5 | 17660 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
17661 | } |
17662 | ||
17663 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
17664 | Mark the end of a set of line number records. | |
d9b3de22 | 17665 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
17666 | If SUBFILE is NULL the request is ignored. */ |
17667 | ||
17668 | static void | |
17669 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
17670 | CORE_ADDR address, record_line_ftype p_record_line) | |
17671 | { | |
27e0867f DE |
17672 | if (subfile == NULL) |
17673 | return; | |
17674 | ||
17675 | if (dwarf_line_debug) | |
17676 | { | |
17677 | fprintf_unfiltered (gdb_stdlog, | |
17678 | "Finishing current line, file %s, address %s\n", | |
17679 | lbasename (subfile->name), | |
17680 | paddress (gdbarch, address)); | |
17681 | } | |
17682 | ||
d9b3de22 DE |
17683 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
17684 | } | |
17685 | ||
17686 | /* Record the line in STATE. | |
17687 | END_SEQUENCE is non-zero if we're processing the end of a sequence. */ | |
17688 | ||
17689 | static void | |
17690 | dwarf_record_line (lnp_reader_state *reader, lnp_state_machine *state, | |
17691 | int end_sequence) | |
17692 | { | |
17693 | const struct line_header *lh = reader->line_header; | |
17694 | unsigned int file, line, discriminator; | |
17695 | int is_stmt; | |
17696 | ||
17697 | file = state->file; | |
17698 | line = state->line; | |
17699 | is_stmt = state->is_stmt; | |
17700 | discriminator = state->discriminator; | |
17701 | ||
17702 | if (dwarf_line_debug) | |
17703 | { | |
17704 | fprintf_unfiltered (gdb_stdlog, | |
17705 | "Processing actual line %u: file %u," | |
17706 | " address %s, is_stmt %u, discrim %u\n", | |
17707 | line, file, | |
17708 | paddress (reader->gdbarch, state->address), | |
17709 | is_stmt, discriminator); | |
17710 | } | |
17711 | ||
17712 | if (file == 0 || file - 1 >= lh->num_file_names) | |
17713 | dwarf2_debug_line_missing_file_complaint (); | |
17714 | /* For now we ignore lines not starting on an instruction boundary. | |
17715 | But not when processing end_sequence for compatibility with the | |
17716 | previous version of the code. */ | |
17717 | else if (state->op_index == 0 || end_sequence) | |
17718 | { | |
17719 | lh->file_names[file - 1].included_p = 1; | |
17720 | if (reader->record_lines_p && is_stmt) | |
17721 | { | |
e815d2d2 | 17722 | if (state->last_subfile != current_subfile || end_sequence) |
d9b3de22 DE |
17723 | { |
17724 | dwarf_finish_line (reader->gdbarch, state->last_subfile, | |
17725 | state->address, state->record_line); | |
17726 | } | |
17727 | ||
17728 | if (!end_sequence) | |
17729 | { | |
17730 | if (dwarf_record_line_p (line, state->last_line, | |
17731 | state->line_has_non_zero_discriminator, | |
17732 | state->last_subfile)) | |
17733 | { | |
17734 | dwarf_record_line_1 (reader->gdbarch, current_subfile, | |
17735 | line, state->address, | |
17736 | state->record_line); | |
17737 | } | |
17738 | state->last_subfile = current_subfile; | |
17739 | state->last_line = line; | |
17740 | } | |
17741 | } | |
17742 | } | |
17743 | } | |
17744 | ||
17745 | /* Initialize STATE for the start of a line number program. */ | |
17746 | ||
17747 | static void | |
17748 | init_lnp_state_machine (lnp_state_machine *state, | |
17749 | const lnp_reader_state *reader) | |
17750 | { | |
17751 | memset (state, 0, sizeof (*state)); | |
17752 | ||
17753 | /* Just starting, there is no "last file". */ | |
17754 | state->last_file = 0; | |
17755 | state->last_subfile = NULL; | |
17756 | ||
17757 | state->record_line = record_line; | |
17758 | ||
17759 | state->last_line = 0; | |
17760 | state->line_has_non_zero_discriminator = 0; | |
17761 | ||
17762 | /* Initialize these according to the DWARF spec. */ | |
17763 | state->op_index = 0; | |
17764 | state->file = 1; | |
17765 | state->line = 1; | |
17766 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there | |
17767 | was a line entry for it so that the backend has a chance to adjust it | |
17768 | and also record it in case it needs it. This is currently used by MIPS | |
17769 | code, cf. `mips_adjust_dwarf2_line'. */ | |
17770 | state->address = gdbarch_adjust_dwarf2_line (reader->gdbarch, 0, 0); | |
17771 | state->is_stmt = reader->line_header->default_is_stmt; | |
17772 | state->discriminator = 0; | |
252a6764 DE |
17773 | } |
17774 | ||
924c2928 DE |
17775 | /* Check address and if invalid nop-out the rest of the lines in this |
17776 | sequence. */ | |
17777 | ||
17778 | static void | |
d9b3de22 | 17779 | check_line_address (struct dwarf2_cu *cu, lnp_state_machine *state, |
924c2928 DE |
17780 | const gdb_byte *line_ptr, |
17781 | CORE_ADDR lowpc, CORE_ADDR address) | |
17782 | { | |
17783 | /* If address < lowpc then it's not a usable value, it's outside the | |
17784 | pc range of the CU. However, we restrict the test to only address | |
17785 | values of zero to preserve GDB's previous behaviour which is to | |
17786 | handle the specific case of a function being GC'd by the linker. */ | |
17787 | ||
17788 | if (address == 0 && address < lowpc) | |
17789 | { | |
17790 | /* This line table is for a function which has been | |
17791 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
17792 | ||
17793 | struct objfile *objfile = cu->objfile; | |
17794 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
17795 | ||
17796 | complaint (&symfile_complaints, | |
17797 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
17798 | line_offset, objfile_name (objfile)); | |
d9b3de22 DE |
17799 | state->record_line = noop_record_line; |
17800 | /* Note: sm.record_line is left as noop_record_line | |
924c2928 DE |
17801 | until we see DW_LNE_end_sequence. */ |
17802 | } | |
17803 | } | |
17804 | ||
f3f5162e | 17805 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
17806 | Process the line number information in LH. |
17807 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
17808 | program in order to set included_p for every referenced header. */ | |
debd256d | 17809 | |
c906108c | 17810 | static void |
43f3e411 DE |
17811 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
17812 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 17813 | { |
d521ce57 TT |
17814 | const gdb_byte *line_ptr, *extended_end; |
17815 | const gdb_byte *line_end; | |
a8c50c1f | 17816 | unsigned int bytes_read, extended_len; |
699ca60a | 17817 | unsigned char op_code, extended_op; |
e142c38c DJ |
17818 | CORE_ADDR baseaddr; |
17819 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 17820 | bfd *abfd = objfile->obfd; |
fbf65064 | 17821 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
d9b3de22 DE |
17822 | /* Non-zero if we're recording line info (as opposed to building partial |
17823 | symtabs). */ | |
17824 | int record_lines_p = !decode_for_pst_p; | |
17825 | /* A collection of things we need to pass to dwarf_record_line. */ | |
17826 | lnp_reader_state reader_state; | |
e142c38c DJ |
17827 | |
17828 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17829 | |
debd256d JB |
17830 | line_ptr = lh->statement_program_start; |
17831 | line_end = lh->statement_program_end; | |
c906108c | 17832 | |
d9b3de22 DE |
17833 | reader_state.gdbarch = gdbarch; |
17834 | reader_state.line_header = lh; | |
17835 | reader_state.record_lines_p = record_lines_p; | |
17836 | ||
c906108c SS |
17837 | /* Read the statement sequences until there's nothing left. */ |
17838 | while (line_ptr < line_end) | |
17839 | { | |
d9b3de22 DE |
17840 | /* The DWARF line number program state machine. */ |
17841 | lnp_state_machine state_machine; | |
c906108c | 17842 | int end_sequence = 0; |
d9b3de22 DE |
17843 | |
17844 | /* Reset the state machine at the start of each sequence. */ | |
17845 | init_lnp_state_machine (&state_machine, &reader_state); | |
17846 | ||
17847 | if (record_lines_p && lh->num_file_names >= state_machine.file) | |
c906108c | 17848 | { |
aaa75496 | 17849 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
17850 | /* lh->include_dirs and lh->file_names are 0-based, but the |
17851 | directory and file name numbers in the statement program | |
17852 | are 1-based. */ | |
d9b3de22 | 17853 | struct file_entry *fe = &lh->file_names[state_machine.file - 1]; |
d521ce57 | 17854 | const char *dir = NULL; |
a738430d | 17855 | |
afa6c9ab | 17856 | if (fe->dir_index && lh->include_dirs != NULL) |
debd256d | 17857 | dir = lh->include_dirs[fe->dir_index - 1]; |
4f1520fb | 17858 | |
4d663531 | 17859 | dwarf2_start_subfile (fe->name, dir); |
c906108c SS |
17860 | } |
17861 | ||
a738430d | 17862 | /* Decode the table. */ |
d9b3de22 | 17863 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
17864 | { |
17865 | op_code = read_1_byte (abfd, line_ptr); | |
17866 | line_ptr += 1; | |
9aa1fe7e | 17867 | |
debd256d | 17868 | if (op_code >= lh->opcode_base) |
6e70227d | 17869 | { |
8e07a239 | 17870 | /* Special opcode. */ |
699ca60a | 17871 | unsigned char adj_opcode; |
3e29f34a | 17872 | CORE_ADDR addr_adj; |
a05a36a5 | 17873 | int line_delta; |
8e07a239 | 17874 | |
debd256d | 17875 | adj_opcode = op_code - lh->opcode_base; |
d9b3de22 DE |
17876 | addr_adj = (((state_machine.op_index |
17877 | + (adj_opcode / lh->line_range)) | |
2dc7f7b3 TT |
17878 | / lh->maximum_ops_per_instruction) |
17879 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
17880 | state_machine.address |
17881 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
17882 | state_machine.op_index = ((state_machine.op_index | |
17883 | + (adj_opcode / lh->line_range)) | |
17884 | % lh->maximum_ops_per_instruction); | |
a05a36a5 | 17885 | line_delta = lh->line_base + (adj_opcode % lh->line_range); |
d9b3de22 | 17886 | state_machine.line += line_delta; |
a05a36a5 | 17887 | if (line_delta != 0) |
d9b3de22 DE |
17888 | state_machine.line_has_non_zero_discriminator |
17889 | = state_machine.discriminator != 0; | |
17890 | ||
17891 | dwarf_record_line (&reader_state, &state_machine, 0); | |
17892 | state_machine.discriminator = 0; | |
9aa1fe7e GK |
17893 | } |
17894 | else switch (op_code) | |
c906108c SS |
17895 | { |
17896 | case DW_LNS_extended_op: | |
3e43a32a MS |
17897 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
17898 | &bytes_read); | |
473b7be6 | 17899 | line_ptr += bytes_read; |
a8c50c1f | 17900 | extended_end = line_ptr + extended_len; |
c906108c SS |
17901 | extended_op = read_1_byte (abfd, line_ptr); |
17902 | line_ptr += 1; | |
17903 | switch (extended_op) | |
17904 | { | |
17905 | case DW_LNE_end_sequence: | |
d9b3de22 | 17906 | state_machine.record_line = record_line; |
c906108c | 17907 | end_sequence = 1; |
c906108c SS |
17908 | break; |
17909 | case DW_LNE_set_address: | |
d9b3de22 DE |
17910 | { |
17911 | CORE_ADDR address | |
17912 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
17913 | ||
17914 | line_ptr += bytes_read; | |
17915 | check_line_address (cu, &state_machine, line_ptr, | |
17916 | lowpc, address); | |
17917 | state_machine.op_index = 0; | |
17918 | address += baseaddr; | |
17919 | state_machine.address | |
17920 | = gdbarch_adjust_dwarf2_line (gdbarch, address, 0); | |
17921 | } | |
c906108c SS |
17922 | break; |
17923 | case DW_LNE_define_file: | |
debd256d | 17924 | { |
d521ce57 | 17925 | const char *cur_file; |
debd256d | 17926 | unsigned int dir_index, mod_time, length; |
6e70227d | 17927 | |
3e43a32a MS |
17928 | cur_file = read_direct_string (abfd, line_ptr, |
17929 | &bytes_read); | |
debd256d JB |
17930 | line_ptr += bytes_read; |
17931 | dir_index = | |
17932 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17933 | line_ptr += bytes_read; | |
17934 | mod_time = | |
17935 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17936 | line_ptr += bytes_read; | |
17937 | length = | |
17938 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17939 | line_ptr += bytes_read; | |
17940 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17941 | } | |
c906108c | 17942 | break; |
d0c6ba3d CC |
17943 | case DW_LNE_set_discriminator: |
17944 | /* The discriminator is not interesting to the debugger; | |
a05a36a5 DE |
17945 | just ignore it. We still need to check its value though: |
17946 | if there are consecutive entries for the same | |
17947 | (non-prologue) line we want to coalesce them. | |
17948 | PR 17276. */ | |
d9b3de22 DE |
17949 | state_machine.discriminator |
17950 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17951 | state_machine.line_has_non_zero_discriminator | |
17952 | |= state_machine.discriminator != 0; | |
a05a36a5 | 17953 | line_ptr += bytes_read; |
d0c6ba3d | 17954 | break; |
c906108c | 17955 | default: |
4d3c2250 | 17956 | complaint (&symfile_complaints, |
e2e0b3e5 | 17957 | _("mangled .debug_line section")); |
debd256d | 17958 | return; |
c906108c | 17959 | } |
a8c50c1f DJ |
17960 | /* Make sure that we parsed the extended op correctly. If e.g. |
17961 | we expected a different address size than the producer used, | |
17962 | we may have read the wrong number of bytes. */ | |
17963 | if (line_ptr != extended_end) | |
17964 | { | |
17965 | complaint (&symfile_complaints, | |
17966 | _("mangled .debug_line section")); | |
17967 | return; | |
17968 | } | |
c906108c SS |
17969 | break; |
17970 | case DW_LNS_copy: | |
d9b3de22 DE |
17971 | dwarf_record_line (&reader_state, &state_machine, 0); |
17972 | state_machine.discriminator = 0; | |
c906108c SS |
17973 | break; |
17974 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
17975 | { |
17976 | CORE_ADDR adjust | |
17977 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
3e29f34a | 17978 | CORE_ADDR addr_adj; |
2dc7f7b3 | 17979 | |
d9b3de22 | 17980 | addr_adj = (((state_machine.op_index + adjust) |
2dc7f7b3 TT |
17981 | / lh->maximum_ops_per_instruction) |
17982 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
17983 | state_machine.address |
17984 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
17985 | state_machine.op_index = ((state_machine.op_index + adjust) | |
17986 | % lh->maximum_ops_per_instruction); | |
2dc7f7b3 TT |
17987 | line_ptr += bytes_read; |
17988 | } | |
c906108c SS |
17989 | break; |
17990 | case DW_LNS_advance_line: | |
a05a36a5 DE |
17991 | { |
17992 | int line_delta | |
17993 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
17994 | ||
d9b3de22 | 17995 | state_machine.line += line_delta; |
a05a36a5 | 17996 | if (line_delta != 0) |
d9b3de22 DE |
17997 | state_machine.line_has_non_zero_discriminator |
17998 | = state_machine.discriminator != 0; | |
a05a36a5 DE |
17999 | line_ptr += bytes_read; |
18000 | } | |
c906108c SS |
18001 | break; |
18002 | case DW_LNS_set_file: | |
d9b3de22 DE |
18003 | { |
18004 | /* The arrays lh->include_dirs and lh->file_names are | |
18005 | 0-based, but the directory and file name numbers in | |
18006 | the statement program are 1-based. */ | |
18007 | struct file_entry *fe; | |
18008 | const char *dir = NULL; | |
18009 | ||
18010 | state_machine.file = read_unsigned_leb128 (abfd, line_ptr, | |
18011 | &bytes_read); | |
18012 | line_ptr += bytes_read; | |
18013 | if (state_machine.file == 0 | |
18014 | || state_machine.file - 1 >= lh->num_file_names) | |
18015 | dwarf2_debug_line_missing_file_complaint (); | |
18016 | else | |
18017 | { | |
18018 | fe = &lh->file_names[state_machine.file - 1]; | |
18019 | if (fe->dir_index && lh->include_dirs != NULL) | |
18020 | dir = lh->include_dirs[fe->dir_index - 1]; | |
18021 | if (record_lines_p) | |
18022 | { | |
18023 | state_machine.last_subfile = current_subfile; | |
18024 | state_machine.line_has_non_zero_discriminator | |
18025 | = state_machine.discriminator != 0; | |
18026 | dwarf2_start_subfile (fe->name, dir); | |
18027 | } | |
18028 | } | |
18029 | } | |
c906108c SS |
18030 | break; |
18031 | case DW_LNS_set_column: | |
0ad93d4f | 18032 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
18033 | line_ptr += bytes_read; |
18034 | break; | |
18035 | case DW_LNS_negate_stmt: | |
d9b3de22 | 18036 | state_machine.is_stmt = (!state_machine.is_stmt); |
c906108c SS |
18037 | break; |
18038 | case DW_LNS_set_basic_block: | |
c906108c | 18039 | break; |
c2c6d25f JM |
18040 | /* Add to the address register of the state machine the |
18041 | address increment value corresponding to special opcode | |
a738430d MK |
18042 | 255. I.e., this value is scaled by the minimum |
18043 | instruction length since special opcode 255 would have | |
b021a221 | 18044 | scaled the increment. */ |
c906108c | 18045 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
18046 | { |
18047 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
3e29f34a | 18048 | CORE_ADDR addr_adj; |
2dc7f7b3 | 18049 | |
d9b3de22 | 18050 | addr_adj = (((state_machine.op_index + adjust) |
2dc7f7b3 TT |
18051 | / lh->maximum_ops_per_instruction) |
18052 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
18053 | state_machine.address |
18054 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18055 | state_machine.op_index = ((state_machine.op_index + adjust) | |
18056 | % lh->maximum_ops_per_instruction); | |
2dc7f7b3 | 18057 | } |
c906108c SS |
18058 | break; |
18059 | case DW_LNS_fixed_advance_pc: | |
3e29f34a MR |
18060 | { |
18061 | CORE_ADDR addr_adj; | |
18062 | ||
18063 | addr_adj = read_2_bytes (abfd, line_ptr); | |
d9b3de22 DE |
18064 | state_machine.address |
18065 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18066 | state_machine.op_index = 0; | |
3e29f34a MR |
18067 | line_ptr += 2; |
18068 | } | |
c906108c | 18069 | break; |
9aa1fe7e | 18070 | default: |
a738430d MK |
18071 | { |
18072 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 18073 | int i; |
a738430d | 18074 | |
debd256d | 18075 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
18076 | { |
18077 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18078 | line_ptr += bytes_read; | |
18079 | } | |
18080 | } | |
c906108c SS |
18081 | } |
18082 | } | |
d9b3de22 DE |
18083 | |
18084 | if (!end_sequence) | |
18085 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
18086 | ||
18087 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
18088 | in which case we still finish recording the last line). */ | |
18089 | dwarf_record_line (&reader_state, &state_machine, 1); | |
c906108c | 18090 | } |
f3f5162e DE |
18091 | } |
18092 | ||
18093 | /* Decode the Line Number Program (LNP) for the given line_header | |
18094 | structure and CU. The actual information extracted and the type | |
18095 | of structures created from the LNP depends on the value of PST. | |
18096 | ||
18097 | 1. If PST is NULL, then this procedure uses the data from the program | |
18098 | to create all necessary symbol tables, and their linetables. | |
18099 | ||
18100 | 2. If PST is not NULL, this procedure reads the program to determine | |
18101 | the list of files included by the unit represented by PST, and | |
18102 | builds all the associated partial symbol tables. | |
18103 | ||
18104 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18105 | It is used for relative paths in the line table. | |
18106 | NOTE: When processing partial symtabs (pst != NULL), | |
18107 | comp_dir == pst->dirname. | |
18108 | ||
18109 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
18110 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
18111 | symtab we don't use it in the name of the psymtabs we create. | |
18112 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
18113 | A good testcase for this is mb-inline.exp. |
18114 | ||
527f3840 JK |
18115 | LOWPC is the lowest address in CU (or 0 if not known). |
18116 | ||
18117 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
18118 | for its PC<->lines mapping information. Otherwise only the filename | |
18119 | table is read in. */ | |
f3f5162e DE |
18120 | |
18121 | static void | |
18122 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 18123 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 18124 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
18125 | { |
18126 | struct objfile *objfile = cu->objfile; | |
18127 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 18128 | |
527f3840 JK |
18129 | if (decode_mapping) |
18130 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
18131 | |
18132 | if (decode_for_pst_p) | |
18133 | { | |
18134 | int file_index; | |
18135 | ||
18136 | /* Now that we're done scanning the Line Header Program, we can | |
18137 | create the psymtab of each included file. */ | |
18138 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
18139 | if (lh->file_names[file_index].included_p == 1) | |
18140 | { | |
d521ce57 | 18141 | const char *include_name = |
c6da4cef DE |
18142 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
18143 | if (include_name != NULL) | |
aaa75496 JB |
18144 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
18145 | } | |
18146 | } | |
cb1df416 DJ |
18147 | else |
18148 | { | |
18149 | /* Make sure a symtab is created for every file, even files | |
18150 | which contain only variables (i.e. no code with associated | |
18151 | line numbers). */ | |
43f3e411 | 18152 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 18153 | int i; |
cb1df416 DJ |
18154 | |
18155 | for (i = 0; i < lh->num_file_names; i++) | |
18156 | { | |
d521ce57 | 18157 | const char *dir = NULL; |
f3f5162e | 18158 | struct file_entry *fe; |
9a619af0 | 18159 | |
cb1df416 | 18160 | fe = &lh->file_names[i]; |
afa6c9ab | 18161 | if (fe->dir_index && lh->include_dirs != NULL) |
cb1df416 | 18162 | dir = lh->include_dirs[fe->dir_index - 1]; |
4d663531 | 18163 | dwarf2_start_subfile (fe->name, dir); |
cb1df416 | 18164 | |
cb1df416 | 18165 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
18166 | { |
18167 | current_subfile->symtab | |
18168 | = allocate_symtab (cust, current_subfile->name); | |
18169 | } | |
cb1df416 DJ |
18170 | fe->symtab = current_subfile->symtab; |
18171 | } | |
18172 | } | |
c906108c SS |
18173 | } |
18174 | ||
18175 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
18176 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 18177 | or NULL if not known. |
c906108c SS |
18178 | This routine tries to keep line numbers from identical absolute and |
18179 | relative file names in a common subfile. | |
18180 | ||
18181 | Using the `list' example from the GDB testsuite, which resides in | |
18182 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
18183 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
18184 | ||
c5aa993b | 18185 | DW_AT_name: /srcdir/list0.c |
4d663531 | 18186 | DW_AT_comp_dir: /compdir |
357e46e7 | 18187 | files.files[0].name: list0.h |
c5aa993b | 18188 | files.files[0].dir: /srcdir |
357e46e7 | 18189 | files.files[1].name: list0.c |
c5aa993b | 18190 | files.files[1].dir: /srcdir |
c906108c SS |
18191 | |
18192 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
18193 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
18194 | start_subfile will ensure that this happens provided that we pass the | |
18195 | concatenation of files.files[1].dir and files.files[1].name as the | |
18196 | subfile's name. */ | |
c906108c SS |
18197 | |
18198 | static void | |
4d663531 | 18199 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 18200 | { |
d521ce57 | 18201 | char *copy = NULL; |
4f1520fb | 18202 | |
4d663531 | 18203 | /* In order not to lose the line information directory, |
4f1520fb FR |
18204 | we concatenate it to the filename when it makes sense. |
18205 | Note that the Dwarf3 standard says (speaking of filenames in line | |
18206 | information): ``The directory index is ignored for file names | |
18207 | that represent full path names''. Thus ignoring dirname in the | |
18208 | `else' branch below isn't an issue. */ | |
c906108c | 18209 | |
d5166ae1 | 18210 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
18211 | { |
18212 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
18213 | filename = copy; | |
18214 | } | |
c906108c | 18215 | |
4d663531 | 18216 | start_subfile (filename); |
4f1520fb | 18217 | |
d521ce57 TT |
18218 | if (copy != NULL) |
18219 | xfree (copy); | |
c906108c SS |
18220 | } |
18221 | ||
f4dc4d17 DE |
18222 | /* Start a symtab for DWARF. |
18223 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
18224 | ||
43f3e411 | 18225 | static struct compunit_symtab * |
f4dc4d17 | 18226 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 18227 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 18228 | { |
43f3e411 DE |
18229 | struct compunit_symtab *cust |
18230 | = start_symtab (cu->objfile, name, comp_dir, low_pc); | |
18231 | ||
f4dc4d17 DE |
18232 | record_debugformat ("DWARF 2"); |
18233 | record_producer (cu->producer); | |
18234 | ||
18235 | /* We assume that we're processing GCC output. */ | |
18236 | processing_gcc_compilation = 2; | |
18237 | ||
4d4ec4e5 | 18238 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
18239 | |
18240 | return cust; | |
f4dc4d17 DE |
18241 | } |
18242 | ||
4c2df51b DJ |
18243 | static void |
18244 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18245 | struct dwarf2_cu *cu) |
4c2df51b | 18246 | { |
e7c27a73 DJ |
18247 | struct objfile *objfile = cu->objfile; |
18248 | struct comp_unit_head *cu_header = &cu->header; | |
18249 | ||
4c2df51b DJ |
18250 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
18251 | code here to turn a symbol with DW_AT_external and a | |
18252 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
18253 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
18254 | with some versions of binutils) where shared libraries could have | |
18255 | relocations against symbols in their debug information - the | |
18256 | minimal symbol would have the right address, but the debug info | |
18257 | would not. It's no longer necessary, because we will explicitly | |
18258 | apply relocations when we read in the debug information now. */ | |
18259 | ||
18260 | /* A DW_AT_location attribute with no contents indicates that a | |
18261 | variable has been optimized away. */ | |
18262 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
18263 | { | |
f1e6e072 | 18264 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
18265 | return; |
18266 | } | |
18267 | ||
18268 | /* Handle one degenerate form of location expression specially, to | |
18269 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
18270 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
18271 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
18272 | |
18273 | if (attr_form_is_block (attr) | |
3019eac3 DE |
18274 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
18275 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
18276 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
18277 | && (DW_BLOCK (attr)->size | |
18278 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 18279 | { |
891d2f0b | 18280 | unsigned int dummy; |
4c2df51b | 18281 | |
3019eac3 DE |
18282 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
18283 | SYMBOL_VALUE_ADDRESS (sym) = | |
18284 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
18285 | else | |
18286 | SYMBOL_VALUE_ADDRESS (sym) = | |
18287 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 18288 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
18289 | fixup_symbol_section (sym, objfile); |
18290 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
18291 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
18292 | return; |
18293 | } | |
18294 | ||
18295 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
18296 | expression evaluator, and use LOC_COMPUTED only when necessary | |
18297 | (i.e. when the value of a register or memory location is | |
18298 | referenced, or a thread-local block, etc.). Then again, it might | |
18299 | not be worthwhile. I'm assuming that it isn't unless performance | |
18300 | or memory numbers show me otherwise. */ | |
18301 | ||
f1e6e072 | 18302 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 18303 | |
f1e6e072 | 18304 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 18305 | cu->has_loclist = 1; |
4c2df51b DJ |
18306 | } |
18307 | ||
c906108c SS |
18308 | /* Given a pointer to a DWARF information entry, figure out if we need |
18309 | to make a symbol table entry for it, and if so, create a new entry | |
18310 | and return a pointer to it. | |
18311 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
18312 | used the passed type. |
18313 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
18314 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
18315 | |
18316 | static struct symbol * | |
34eaf542 TT |
18317 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
18318 | struct symbol *space) | |
c906108c | 18319 | { |
e7c27a73 | 18320 | struct objfile *objfile = cu->objfile; |
3e29f34a | 18321 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 18322 | struct symbol *sym = NULL; |
15d034d0 | 18323 | const char *name; |
c906108c SS |
18324 | struct attribute *attr = NULL; |
18325 | struct attribute *attr2 = NULL; | |
e142c38c | 18326 | CORE_ADDR baseaddr; |
e37fd15a SW |
18327 | struct pending **list_to_add = NULL; |
18328 | ||
edb3359d | 18329 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
18330 | |
18331 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 18332 | |
94af9270 | 18333 | name = dwarf2_name (die, cu); |
c906108c SS |
18334 | if (name) |
18335 | { | |
94af9270 | 18336 | const char *linkagename; |
34eaf542 | 18337 | int suppress_add = 0; |
94af9270 | 18338 | |
34eaf542 TT |
18339 | if (space) |
18340 | sym = space; | |
18341 | else | |
e623cf5d | 18342 | sym = allocate_symbol (objfile); |
c906108c | 18343 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
18344 | |
18345 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 18346 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
18347 | linkagename = dwarf2_physname (name, die, cu); |
18348 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 18349 | |
f55ee35c JK |
18350 | /* Fortran does not have mangling standard and the mangling does differ |
18351 | between gfortran, iFort etc. */ | |
18352 | if (cu->language == language_fortran | |
b250c185 | 18353 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 18354 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 18355 | dwarf2_full_name (name, die, cu), |
29df156d | 18356 | NULL); |
f55ee35c | 18357 | |
c906108c | 18358 | /* Default assumptions. |
c5aa993b | 18359 | Use the passed type or decode it from the die. */ |
176620f1 | 18360 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 18361 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
18362 | if (type != NULL) |
18363 | SYMBOL_TYPE (sym) = type; | |
18364 | else | |
e7c27a73 | 18365 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
18366 | attr = dwarf2_attr (die, |
18367 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
18368 | cu); | |
c906108c SS |
18369 | if (attr) |
18370 | { | |
18371 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
18372 | } | |
cb1df416 | 18373 | |
edb3359d DJ |
18374 | attr = dwarf2_attr (die, |
18375 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
18376 | cu); | |
cb1df416 DJ |
18377 | if (attr) |
18378 | { | |
18379 | int file_index = DW_UNSND (attr); | |
9a619af0 | 18380 | |
cb1df416 DJ |
18381 | if (cu->line_header == NULL |
18382 | || file_index > cu->line_header->num_file_names) | |
18383 | complaint (&symfile_complaints, | |
18384 | _("file index out of range")); | |
1c3d648d | 18385 | else if (file_index > 0) |
cb1df416 DJ |
18386 | { |
18387 | struct file_entry *fe; | |
9a619af0 | 18388 | |
cb1df416 | 18389 | fe = &cu->line_header->file_names[file_index - 1]; |
08be3fe3 | 18390 | symbol_set_symtab (sym, fe->symtab); |
cb1df416 DJ |
18391 | } |
18392 | } | |
18393 | ||
c906108c SS |
18394 | switch (die->tag) |
18395 | { | |
18396 | case DW_TAG_label: | |
e142c38c | 18397 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 18398 | if (attr) |
3e29f34a MR |
18399 | { |
18400 | CORE_ADDR addr; | |
18401 | ||
18402 | addr = attr_value_as_address (attr); | |
18403 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
18404 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
18405 | } | |
0f5238ed TT |
18406 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
18407 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 18408 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 18409 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
18410 | break; |
18411 | case DW_TAG_subprogram: | |
18412 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
18413 | finish_block. */ | |
f1e6e072 | 18414 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 18415 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
18416 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
18417 | || cu->language == language_ada) | |
c906108c | 18418 | { |
2cfa0c8d JB |
18419 | /* Subprograms marked external are stored as a global symbol. |
18420 | Ada subprograms, whether marked external or not, are always | |
18421 | stored as a global symbol, because we want to be able to | |
18422 | access them globally. For instance, we want to be able | |
18423 | to break on a nested subprogram without having to | |
18424 | specify the context. */ | |
e37fd15a | 18425 | list_to_add = &global_symbols; |
c906108c SS |
18426 | } |
18427 | else | |
18428 | { | |
e37fd15a | 18429 | list_to_add = cu->list_in_scope; |
c906108c SS |
18430 | } |
18431 | break; | |
edb3359d DJ |
18432 | case DW_TAG_inlined_subroutine: |
18433 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
18434 | finish_block. */ | |
f1e6e072 | 18435 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 18436 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 18437 | list_to_add = cu->list_in_scope; |
edb3359d | 18438 | break; |
34eaf542 TT |
18439 | case DW_TAG_template_value_param: |
18440 | suppress_add = 1; | |
18441 | /* Fall through. */ | |
72929c62 | 18442 | case DW_TAG_constant: |
c906108c | 18443 | case DW_TAG_variable: |
254e6b9e | 18444 | case DW_TAG_member: |
0963b4bd MS |
18445 | /* Compilation with minimal debug info may result in |
18446 | variables with missing type entries. Change the | |
18447 | misleading `void' type to something sensible. */ | |
c906108c | 18448 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 18449 | SYMBOL_TYPE (sym) |
46bf5051 | 18450 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 18451 | |
e142c38c | 18452 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
18453 | /* In the case of DW_TAG_member, we should only be called for |
18454 | static const members. */ | |
18455 | if (die->tag == DW_TAG_member) | |
18456 | { | |
3863f96c DE |
18457 | /* dwarf2_add_field uses die_is_declaration, |
18458 | so we do the same. */ | |
254e6b9e DE |
18459 | gdb_assert (die_is_declaration (die, cu)); |
18460 | gdb_assert (attr); | |
18461 | } | |
c906108c SS |
18462 | if (attr) |
18463 | { | |
e7c27a73 | 18464 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 18465 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 18466 | if (!suppress_add) |
34eaf542 TT |
18467 | { |
18468 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 18469 | list_to_add = &global_symbols; |
34eaf542 | 18470 | else |
e37fd15a | 18471 | list_to_add = cu->list_in_scope; |
34eaf542 | 18472 | } |
c906108c SS |
18473 | break; |
18474 | } | |
e142c38c | 18475 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18476 | if (attr) |
18477 | { | |
e7c27a73 | 18478 | var_decode_location (attr, sym, cu); |
e142c38c | 18479 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
18480 | |
18481 | /* Fortran explicitly imports any global symbols to the local | |
18482 | scope by DW_TAG_common_block. */ | |
18483 | if (cu->language == language_fortran && die->parent | |
18484 | && die->parent->tag == DW_TAG_common_block) | |
18485 | attr2 = NULL; | |
18486 | ||
caac4577 JG |
18487 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
18488 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
18489 | && !dwarf2_per_objfile->has_section_at_zero) | |
18490 | { | |
18491 | /* When a static variable is eliminated by the linker, | |
18492 | the corresponding debug information is not stripped | |
18493 | out, but the variable address is set to null; | |
18494 | do not add such variables into symbol table. */ | |
18495 | } | |
18496 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 18497 | { |
f55ee35c JK |
18498 | /* Workaround gfortran PR debug/40040 - it uses |
18499 | DW_AT_location for variables in -fPIC libraries which may | |
18500 | get overriden by other libraries/executable and get | |
18501 | a different address. Resolve it by the minimal symbol | |
18502 | which may come from inferior's executable using copy | |
18503 | relocation. Make this workaround only for gfortran as for | |
18504 | other compilers GDB cannot guess the minimal symbol | |
18505 | Fortran mangling kind. */ | |
18506 | if (cu->language == language_fortran && die->parent | |
18507 | && die->parent->tag == DW_TAG_module | |
18508 | && cu->producer | |
61012eef | 18509 | && startswith (cu->producer, "GNU Fortran ")) |
f1e6e072 | 18510 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 18511 | |
1c809c68 TT |
18512 | /* A variable with DW_AT_external is never static, |
18513 | but it may be block-scoped. */ | |
18514 | list_to_add = (cu->list_in_scope == &file_symbols | |
18515 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 18516 | } |
c906108c | 18517 | else |
e37fd15a | 18518 | list_to_add = cu->list_in_scope; |
c906108c SS |
18519 | } |
18520 | else | |
18521 | { | |
18522 | /* We do not know the address of this symbol. | |
c5aa993b JM |
18523 | If it is an external symbol and we have type information |
18524 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
18525 | The address of the variable will then be determined from | |
18526 | the minimal symbol table whenever the variable is | |
18527 | referenced. */ | |
e142c38c | 18528 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
18529 | |
18530 | /* Fortran explicitly imports any global symbols to the local | |
18531 | scope by DW_TAG_common_block. */ | |
18532 | if (cu->language == language_fortran && die->parent | |
18533 | && die->parent->tag == DW_TAG_common_block) | |
18534 | { | |
18535 | /* SYMBOL_CLASS doesn't matter here because | |
18536 | read_common_block is going to reset it. */ | |
18537 | if (!suppress_add) | |
18538 | list_to_add = cu->list_in_scope; | |
18539 | } | |
18540 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
18541 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 18542 | { |
0fe7935b DJ |
18543 | /* A variable with DW_AT_external is never static, but it |
18544 | may be block-scoped. */ | |
18545 | list_to_add = (cu->list_in_scope == &file_symbols | |
18546 | ? &global_symbols : cu->list_in_scope); | |
18547 | ||
f1e6e072 | 18548 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 18549 | } |
442ddf59 JK |
18550 | else if (!die_is_declaration (die, cu)) |
18551 | { | |
18552 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
18553 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
18554 | if (!suppress_add) |
18555 | list_to_add = cu->list_in_scope; | |
442ddf59 | 18556 | } |
c906108c SS |
18557 | } |
18558 | break; | |
18559 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
18560 | /* If we are inside a function, mark this as an argument. If |
18561 | not, we might be looking at an argument to an inlined function | |
18562 | when we do not have enough information to show inlined frames; | |
18563 | pretend it's a local variable in that case so that the user can | |
18564 | still see it. */ | |
18565 | if (context_stack_depth > 0 | |
18566 | && context_stack[context_stack_depth - 1].name != NULL) | |
18567 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 18568 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18569 | if (attr) |
18570 | { | |
e7c27a73 | 18571 | var_decode_location (attr, sym, cu); |
c906108c | 18572 | } |
e142c38c | 18573 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18574 | if (attr) |
18575 | { | |
e7c27a73 | 18576 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18577 | } |
f346a30d | 18578 | |
e37fd15a | 18579 | list_to_add = cu->list_in_scope; |
c906108c SS |
18580 | break; |
18581 | case DW_TAG_unspecified_parameters: | |
18582 | /* From varargs functions; gdb doesn't seem to have any | |
18583 | interest in this information, so just ignore it for now. | |
18584 | (FIXME?) */ | |
18585 | break; | |
34eaf542 TT |
18586 | case DW_TAG_template_type_param: |
18587 | suppress_add = 1; | |
18588 | /* Fall through. */ | |
c906108c | 18589 | case DW_TAG_class_type: |
680b30c7 | 18590 | case DW_TAG_interface_type: |
c906108c SS |
18591 | case DW_TAG_structure_type: |
18592 | case DW_TAG_union_type: | |
72019c9c | 18593 | case DW_TAG_set_type: |
c906108c | 18594 | case DW_TAG_enumeration_type: |
f1e6e072 | 18595 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18596 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 18597 | |
63d06c5c | 18598 | { |
987504bb | 18599 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
18600 | really ever be static objects: otherwise, if you try |
18601 | to, say, break of a class's method and you're in a file | |
18602 | which doesn't mention that class, it won't work unless | |
18603 | the check for all static symbols in lookup_symbol_aux | |
18604 | saves you. See the OtherFileClass tests in | |
18605 | gdb.c++/namespace.exp. */ | |
18606 | ||
e37fd15a | 18607 | if (!suppress_add) |
34eaf542 | 18608 | { |
34eaf542 TT |
18609 | list_to_add = (cu->list_in_scope == &file_symbols |
18610 | && (cu->language == language_cplus | |
18611 | || cu->language == language_java) | |
18612 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 18613 | |
64382290 TT |
18614 | /* The semantics of C++ state that "struct foo { |
18615 | ... }" also defines a typedef for "foo". A Java | |
18616 | class declaration also defines a typedef for the | |
18617 | class. */ | |
18618 | if (cu->language == language_cplus | |
18619 | || cu->language == language_java | |
45280282 IB |
18620 | || cu->language == language_ada |
18621 | || cu->language == language_d) | |
64382290 TT |
18622 | { |
18623 | /* The symbol's name is already allocated along | |
18624 | with this objfile, so we don't need to | |
18625 | duplicate it for the type. */ | |
18626 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
18627 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
18628 | } | |
63d06c5c DC |
18629 | } |
18630 | } | |
c906108c SS |
18631 | break; |
18632 | case DW_TAG_typedef: | |
f1e6e072 | 18633 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 18634 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 18635 | list_to_add = cu->list_in_scope; |
63d06c5c | 18636 | break; |
c906108c | 18637 | case DW_TAG_base_type: |
a02abb62 | 18638 | case DW_TAG_subrange_type: |
f1e6e072 | 18639 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18640 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 18641 | list_to_add = cu->list_in_scope; |
c906108c SS |
18642 | break; |
18643 | case DW_TAG_enumerator: | |
e142c38c | 18644 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18645 | if (attr) |
18646 | { | |
e7c27a73 | 18647 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18648 | } |
63d06c5c DC |
18649 | { |
18650 | /* NOTE: carlton/2003-11-10: See comment above in the | |
18651 | DW_TAG_class_type, etc. block. */ | |
18652 | ||
e142c38c | 18653 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
18654 | && (cu->language == language_cplus |
18655 | || cu->language == language_java) | |
e142c38c | 18656 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 18657 | } |
c906108c | 18658 | break; |
74921315 | 18659 | case DW_TAG_imported_declaration: |
5c4e30ca | 18660 | case DW_TAG_namespace: |
f1e6e072 | 18661 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 18662 | list_to_add = &global_symbols; |
5c4e30ca | 18663 | break; |
530e8392 KB |
18664 | case DW_TAG_module: |
18665 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
18666 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
18667 | list_to_add = &global_symbols; | |
18668 | break; | |
4357ac6c | 18669 | case DW_TAG_common_block: |
f1e6e072 | 18670 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
18671 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
18672 | add_symbol_to_list (sym, cu->list_in_scope); | |
18673 | break; | |
c906108c SS |
18674 | default: |
18675 | /* Not a tag we recognize. Hopefully we aren't processing | |
18676 | trash data, but since we must specifically ignore things | |
18677 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 18678 | this point. */ |
e2e0b3e5 | 18679 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 18680 | dwarf_tag_name (die->tag)); |
c906108c SS |
18681 | break; |
18682 | } | |
df8a16a1 | 18683 | |
e37fd15a SW |
18684 | if (suppress_add) |
18685 | { | |
18686 | sym->hash_next = objfile->template_symbols; | |
18687 | objfile->template_symbols = sym; | |
18688 | list_to_add = NULL; | |
18689 | } | |
18690 | ||
18691 | if (list_to_add != NULL) | |
18692 | add_symbol_to_list (sym, list_to_add); | |
18693 | ||
df8a16a1 DJ |
18694 | /* For the benefit of old versions of GCC, check for anonymous |
18695 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 18696 | if (!cu->processing_has_namespace_info |
94af9270 | 18697 | && cu->language == language_cplus) |
a10964d1 | 18698 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
18699 | } |
18700 | return (sym); | |
18701 | } | |
18702 | ||
34eaf542 TT |
18703 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
18704 | ||
18705 | static struct symbol * | |
18706 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
18707 | { | |
18708 | return new_symbol_full (die, type, cu, NULL); | |
18709 | } | |
18710 | ||
98bfdba5 PA |
18711 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
18712 | zero-extend it as appropriate for the symbol's type. The DWARF | |
18713 | standard (v4) is not entirely clear about the meaning of using | |
18714 | DW_FORM_dataN for a constant with a signed type, where the type is | |
18715 | wider than the data. The conclusion of a discussion on the DWARF | |
18716 | list was that this is unspecified. We choose to always zero-extend | |
18717 | because that is the interpretation long in use by GCC. */ | |
c906108c | 18718 | |
98bfdba5 | 18719 | static gdb_byte * |
ff39bb5e | 18720 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 18721 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 18722 | { |
e7c27a73 | 18723 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
18724 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
18725 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
18726 | LONGEST l = DW_UNSND (attr); |
18727 | ||
18728 | if (bits < sizeof (*value) * 8) | |
18729 | { | |
18730 | l &= ((LONGEST) 1 << bits) - 1; | |
18731 | *value = l; | |
18732 | } | |
18733 | else if (bits == sizeof (*value) * 8) | |
18734 | *value = l; | |
18735 | else | |
18736 | { | |
224c3ddb | 18737 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
18738 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
18739 | return bytes; | |
18740 | } | |
18741 | ||
18742 | return NULL; | |
18743 | } | |
18744 | ||
18745 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
18746 | the value does not fit in *VALUE, set *BYTES - either already | |
18747 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
18748 | or, set *BATON, if we translated the constant to a location | |
18749 | expression. */ | |
18750 | ||
18751 | static void | |
ff39bb5e | 18752 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
18753 | const char *name, struct obstack *obstack, |
18754 | struct dwarf2_cu *cu, | |
d521ce57 | 18755 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
18756 | struct dwarf2_locexpr_baton **baton) |
18757 | { | |
18758 | struct objfile *objfile = cu->objfile; | |
18759 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 18760 | struct dwarf_block *blk; |
98bfdba5 PA |
18761 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
18762 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
18763 | ||
18764 | *value = 0; | |
18765 | *bytes = NULL; | |
18766 | *baton = NULL; | |
c906108c SS |
18767 | |
18768 | switch (attr->form) | |
18769 | { | |
18770 | case DW_FORM_addr: | |
3019eac3 | 18771 | case DW_FORM_GNU_addr_index: |
ac56253d | 18772 | { |
ac56253d TT |
18773 | gdb_byte *data; |
18774 | ||
98bfdba5 PA |
18775 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
18776 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 18777 | cu_header->addr_size, |
98bfdba5 | 18778 | TYPE_LENGTH (type)); |
ac56253d TT |
18779 | /* Symbols of this form are reasonably rare, so we just |
18780 | piggyback on the existing location code rather than writing | |
18781 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 18782 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
18783 | (*baton)->per_cu = cu->per_cu; |
18784 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 18785 | |
98bfdba5 | 18786 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 18787 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 18788 | (*baton)->data = data; |
ac56253d TT |
18789 | |
18790 | data[0] = DW_OP_addr; | |
18791 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
18792 | byte_order, DW_ADDR (attr)); | |
18793 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 18794 | } |
c906108c | 18795 | break; |
4ac36638 | 18796 | case DW_FORM_string: |
93b5768b | 18797 | case DW_FORM_strp: |
3019eac3 | 18798 | case DW_FORM_GNU_str_index: |
36586728 | 18799 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
18800 | /* DW_STRING is already allocated on the objfile obstack, point |
18801 | directly to it. */ | |
d521ce57 | 18802 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 18803 | break; |
c906108c SS |
18804 | case DW_FORM_block1: |
18805 | case DW_FORM_block2: | |
18806 | case DW_FORM_block4: | |
18807 | case DW_FORM_block: | |
2dc7f7b3 | 18808 | case DW_FORM_exprloc: |
c906108c | 18809 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
18810 | if (TYPE_LENGTH (type) != blk->size) |
18811 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
18812 | TYPE_LENGTH (type)); | |
18813 | *bytes = blk->data; | |
c906108c | 18814 | break; |
2df3850c JM |
18815 | |
18816 | /* The DW_AT_const_value attributes are supposed to carry the | |
18817 | symbol's value "represented as it would be on the target | |
18818 | architecture." By the time we get here, it's already been | |
18819 | converted to host endianness, so we just need to sign- or | |
18820 | zero-extend it as appropriate. */ | |
18821 | case DW_FORM_data1: | |
3aef2284 | 18822 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 18823 | break; |
c906108c | 18824 | case DW_FORM_data2: |
3aef2284 | 18825 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 18826 | break; |
c906108c | 18827 | case DW_FORM_data4: |
3aef2284 | 18828 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 18829 | break; |
c906108c | 18830 | case DW_FORM_data8: |
3aef2284 | 18831 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
18832 | break; |
18833 | ||
c906108c | 18834 | case DW_FORM_sdata: |
98bfdba5 | 18835 | *value = DW_SND (attr); |
2df3850c JM |
18836 | break; |
18837 | ||
c906108c | 18838 | case DW_FORM_udata: |
98bfdba5 | 18839 | *value = DW_UNSND (attr); |
c906108c | 18840 | break; |
2df3850c | 18841 | |
c906108c | 18842 | default: |
4d3c2250 | 18843 | complaint (&symfile_complaints, |
e2e0b3e5 | 18844 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 18845 | dwarf_form_name (attr->form)); |
98bfdba5 | 18846 | *value = 0; |
c906108c SS |
18847 | break; |
18848 | } | |
18849 | } | |
18850 | ||
2df3850c | 18851 | |
98bfdba5 PA |
18852 | /* Copy constant value from an attribute to a symbol. */ |
18853 | ||
2df3850c | 18854 | static void |
ff39bb5e | 18855 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 18856 | struct dwarf2_cu *cu) |
2df3850c | 18857 | { |
98bfdba5 PA |
18858 | struct objfile *objfile = cu->objfile; |
18859 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 18860 | LONGEST value; |
d521ce57 | 18861 | const gdb_byte *bytes; |
98bfdba5 | 18862 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 18863 | |
98bfdba5 PA |
18864 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
18865 | SYMBOL_PRINT_NAME (sym), | |
18866 | &objfile->objfile_obstack, cu, | |
18867 | &value, &bytes, &baton); | |
2df3850c | 18868 | |
98bfdba5 PA |
18869 | if (baton != NULL) |
18870 | { | |
98bfdba5 | 18871 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 18872 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
18873 | } |
18874 | else if (bytes != NULL) | |
18875 | { | |
18876 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 18877 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
18878 | } |
18879 | else | |
18880 | { | |
18881 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 18882 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 18883 | } |
2df3850c JM |
18884 | } |
18885 | ||
c906108c SS |
18886 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
18887 | ||
18888 | static struct type * | |
e7c27a73 | 18889 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18890 | { |
c906108c | 18891 | struct attribute *type_attr; |
c906108c | 18892 | |
e142c38c | 18893 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
18894 | if (!type_attr) |
18895 | { | |
18896 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 18897 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 18898 | } |
348e048f | 18899 | |
673bfd45 | 18900 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18901 | } |
18902 | ||
b4ba55a1 JB |
18903 | /* True iff CU's producer generates GNAT Ada auxiliary information |
18904 | that allows to find parallel types through that information instead | |
18905 | of having to do expensive parallel lookups by type name. */ | |
18906 | ||
18907 | static int | |
18908 | need_gnat_info (struct dwarf2_cu *cu) | |
18909 | { | |
18910 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
18911 | of GNAT produces this auxiliary information, without any indication | |
18912 | that it is produced. Part of enhancing the FSF version of GNAT | |
18913 | to produce that information will be to put in place an indicator | |
18914 | that we can use in order to determine whether the descriptive type | |
18915 | info is available or not. One suggestion that has been made is | |
18916 | to use a new attribute, attached to the CU die. For now, assume | |
18917 | that the descriptive type info is not available. */ | |
18918 | return 0; | |
18919 | } | |
18920 | ||
b4ba55a1 JB |
18921 | /* Return the auxiliary type of the die in question using its |
18922 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
18923 | attribute is not present. */ | |
18924 | ||
18925 | static struct type * | |
18926 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
18927 | { | |
b4ba55a1 | 18928 | struct attribute *type_attr; |
b4ba55a1 JB |
18929 | |
18930 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
18931 | if (!type_attr) | |
18932 | return NULL; | |
18933 | ||
673bfd45 | 18934 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
18935 | } |
18936 | ||
18937 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
18938 | descriptive type accordingly. */ | |
18939 | ||
18940 | static void | |
18941 | set_descriptive_type (struct type *type, struct die_info *die, | |
18942 | struct dwarf2_cu *cu) | |
18943 | { | |
18944 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
18945 | ||
18946 | if (descriptive_type) | |
18947 | { | |
18948 | ALLOCATE_GNAT_AUX_TYPE (type); | |
18949 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
18950 | } | |
18951 | } | |
18952 | ||
c906108c SS |
18953 | /* Return the containing type of the die in question using its |
18954 | DW_AT_containing_type attribute. */ | |
18955 | ||
18956 | static struct type * | |
e7c27a73 | 18957 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18958 | { |
c906108c | 18959 | struct attribute *type_attr; |
c906108c | 18960 | |
e142c38c | 18961 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
18962 | if (!type_attr) |
18963 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 18964 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 18965 | |
673bfd45 | 18966 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18967 | } |
18968 | ||
ac9ec31b DE |
18969 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
18970 | ||
18971 | static struct type * | |
18972 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
18973 | { | |
18974 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18975 | char *message, *saved; | |
18976 | ||
18977 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 18978 | objfile_name (objfile), |
ac9ec31b DE |
18979 | cu->header.offset.sect_off, |
18980 | die->offset.sect_off); | |
224c3ddb SM |
18981 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
18982 | message, strlen (message)); | |
ac9ec31b DE |
18983 | xfree (message); |
18984 | ||
18985 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
18986 | } | |
18987 | ||
673bfd45 | 18988 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
18989 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
18990 | DW_AT_containing_type. | |
673bfd45 DE |
18991 | If there is no type substitute an error marker. */ |
18992 | ||
c906108c | 18993 | static struct type * |
ff39bb5e | 18994 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 18995 | struct dwarf2_cu *cu) |
c906108c | 18996 | { |
bb5ed363 | 18997 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
18998 | struct type *this_type; |
18999 | ||
ac9ec31b DE |
19000 | gdb_assert (attr->name == DW_AT_type |
19001 | || attr->name == DW_AT_GNAT_descriptive_type | |
19002 | || attr->name == DW_AT_containing_type); | |
19003 | ||
673bfd45 DE |
19004 | /* First see if we have it cached. */ |
19005 | ||
36586728 TT |
19006 | if (attr->form == DW_FORM_GNU_ref_alt) |
19007 | { | |
19008 | struct dwarf2_per_cu_data *per_cu; | |
19009 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
19010 | ||
19011 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
19012 | this_type = get_die_type_at_offset (offset, per_cu); | |
19013 | } | |
7771576e | 19014 | else if (attr_form_is_ref (attr)) |
673bfd45 | 19015 | { |
b64f50a1 | 19016 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
19017 | |
19018 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
19019 | } | |
55f1336d | 19020 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 19021 | { |
ac9ec31b | 19022 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 19023 | |
ac9ec31b | 19024 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
19025 | } |
19026 | else | |
19027 | { | |
ac9ec31b DE |
19028 | complaint (&symfile_complaints, |
19029 | _("Dwarf Error: Bad type attribute %s in DIE" | |
19030 | " at 0x%x [in module %s]"), | |
19031 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 19032 | objfile_name (objfile)); |
ac9ec31b | 19033 | return build_error_marker_type (cu, die); |
673bfd45 DE |
19034 | } |
19035 | ||
19036 | /* If not cached we need to read it in. */ | |
19037 | ||
19038 | if (this_type == NULL) | |
19039 | { | |
ac9ec31b | 19040 | struct die_info *type_die = NULL; |
673bfd45 DE |
19041 | struct dwarf2_cu *type_cu = cu; |
19042 | ||
7771576e | 19043 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19044 | type_die = follow_die_ref (die, attr, &type_cu); |
19045 | if (type_die == NULL) | |
19046 | return build_error_marker_type (cu, die); | |
19047 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
19048 | from an inter-CU reference and the type's CU got expanded before |
19049 | ours. */ | |
ac9ec31b | 19050 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
19051 | } |
19052 | ||
19053 | /* If we still don't have a type use an error marker. */ | |
19054 | ||
19055 | if (this_type == NULL) | |
ac9ec31b | 19056 | return build_error_marker_type (cu, die); |
673bfd45 | 19057 | |
f792889a | 19058 | return this_type; |
c906108c SS |
19059 | } |
19060 | ||
673bfd45 DE |
19061 | /* Return the type in DIE, CU. |
19062 | Returns NULL for invalid types. | |
19063 | ||
02142a6c | 19064 | This first does a lookup in die_type_hash, |
673bfd45 DE |
19065 | and only reads the die in if necessary. |
19066 | ||
19067 | NOTE: This can be called when reading in partial or full symbols. */ | |
19068 | ||
f792889a | 19069 | static struct type * |
e7c27a73 | 19070 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19071 | { |
f792889a DJ |
19072 | struct type *this_type; |
19073 | ||
19074 | this_type = get_die_type (die, cu); | |
19075 | if (this_type) | |
19076 | return this_type; | |
19077 | ||
673bfd45 DE |
19078 | return read_type_die_1 (die, cu); |
19079 | } | |
19080 | ||
19081 | /* Read the type in DIE, CU. | |
19082 | Returns NULL for invalid types. */ | |
19083 | ||
19084 | static struct type * | |
19085 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
19086 | { | |
19087 | struct type *this_type = NULL; | |
19088 | ||
c906108c SS |
19089 | switch (die->tag) |
19090 | { | |
19091 | case DW_TAG_class_type: | |
680b30c7 | 19092 | case DW_TAG_interface_type: |
c906108c SS |
19093 | case DW_TAG_structure_type: |
19094 | case DW_TAG_union_type: | |
f792889a | 19095 | this_type = read_structure_type (die, cu); |
c906108c SS |
19096 | break; |
19097 | case DW_TAG_enumeration_type: | |
f792889a | 19098 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
19099 | break; |
19100 | case DW_TAG_subprogram: | |
19101 | case DW_TAG_subroutine_type: | |
edb3359d | 19102 | case DW_TAG_inlined_subroutine: |
f792889a | 19103 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
19104 | break; |
19105 | case DW_TAG_array_type: | |
f792889a | 19106 | this_type = read_array_type (die, cu); |
c906108c | 19107 | break; |
72019c9c | 19108 | case DW_TAG_set_type: |
f792889a | 19109 | this_type = read_set_type (die, cu); |
72019c9c | 19110 | break; |
c906108c | 19111 | case DW_TAG_pointer_type: |
f792889a | 19112 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
19113 | break; |
19114 | case DW_TAG_ptr_to_member_type: | |
f792889a | 19115 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
19116 | break; |
19117 | case DW_TAG_reference_type: | |
f792889a | 19118 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
19119 | break; |
19120 | case DW_TAG_const_type: | |
f792889a | 19121 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
19122 | break; |
19123 | case DW_TAG_volatile_type: | |
f792889a | 19124 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 19125 | break; |
06d66ee9 TT |
19126 | case DW_TAG_restrict_type: |
19127 | this_type = read_tag_restrict_type (die, cu); | |
19128 | break; | |
c906108c | 19129 | case DW_TAG_string_type: |
f792889a | 19130 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
19131 | break; |
19132 | case DW_TAG_typedef: | |
f792889a | 19133 | this_type = read_typedef (die, cu); |
c906108c | 19134 | break; |
a02abb62 | 19135 | case DW_TAG_subrange_type: |
f792889a | 19136 | this_type = read_subrange_type (die, cu); |
a02abb62 | 19137 | break; |
c906108c | 19138 | case DW_TAG_base_type: |
f792889a | 19139 | this_type = read_base_type (die, cu); |
c906108c | 19140 | break; |
81a17f79 | 19141 | case DW_TAG_unspecified_type: |
f792889a | 19142 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 19143 | break; |
0114d602 DJ |
19144 | case DW_TAG_namespace: |
19145 | this_type = read_namespace_type (die, cu); | |
19146 | break; | |
f55ee35c JK |
19147 | case DW_TAG_module: |
19148 | this_type = read_module_type (die, cu); | |
19149 | break; | |
a2c2acaf MW |
19150 | case DW_TAG_atomic_type: |
19151 | this_type = read_tag_atomic_type (die, cu); | |
19152 | break; | |
c906108c | 19153 | default: |
3e43a32a MS |
19154 | complaint (&symfile_complaints, |
19155 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 19156 | dwarf_tag_name (die->tag)); |
c906108c SS |
19157 | break; |
19158 | } | |
63d06c5c | 19159 | |
f792889a | 19160 | return this_type; |
63d06c5c DC |
19161 | } |
19162 | ||
abc72ce4 DE |
19163 | /* See if we can figure out if the class lives in a namespace. We do |
19164 | this by looking for a member function; its demangled name will | |
19165 | contain namespace info, if there is any. | |
19166 | Return the computed name or NULL. | |
19167 | Space for the result is allocated on the objfile's obstack. | |
19168 | This is the full-die version of guess_partial_die_structure_name. | |
19169 | In this case we know DIE has no useful parent. */ | |
19170 | ||
19171 | static char * | |
19172 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
19173 | { | |
19174 | struct die_info *spec_die; | |
19175 | struct dwarf2_cu *spec_cu; | |
19176 | struct die_info *child; | |
19177 | ||
19178 | spec_cu = cu; | |
19179 | spec_die = die_specification (die, &spec_cu); | |
19180 | if (spec_die != NULL) | |
19181 | { | |
19182 | die = spec_die; | |
19183 | cu = spec_cu; | |
19184 | } | |
19185 | ||
19186 | for (child = die->child; | |
19187 | child != NULL; | |
19188 | child = child->sibling) | |
19189 | { | |
19190 | if (child->tag == DW_TAG_subprogram) | |
19191 | { | |
7d45c7c3 | 19192 | const char *linkage_name; |
abc72ce4 | 19193 | |
7d45c7c3 KB |
19194 | linkage_name = dwarf2_string_attr (child, DW_AT_linkage_name, cu); |
19195 | if (linkage_name == NULL) | |
19196 | linkage_name = dwarf2_string_attr (child, DW_AT_MIPS_linkage_name, | |
19197 | cu); | |
19198 | if (linkage_name != NULL) | |
abc72ce4 DE |
19199 | { |
19200 | char *actual_name | |
19201 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 19202 | linkage_name); |
abc72ce4 DE |
19203 | char *name = NULL; |
19204 | ||
19205 | if (actual_name != NULL) | |
19206 | { | |
15d034d0 | 19207 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
19208 | |
19209 | if (die_name != NULL | |
19210 | && strcmp (die_name, actual_name) != 0) | |
19211 | { | |
19212 | /* Strip off the class name from the full name. | |
19213 | We want the prefix. */ | |
19214 | int die_name_len = strlen (die_name); | |
19215 | int actual_name_len = strlen (actual_name); | |
19216 | ||
19217 | /* Test for '::' as a sanity check. */ | |
19218 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
19219 | && actual_name[actual_name_len |
19220 | - die_name_len - 1] == ':') | |
224c3ddb SM |
19221 | name = (char *) obstack_copy0 ( |
19222 | &cu->objfile->per_bfd->storage_obstack, | |
19223 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
19224 | } |
19225 | } | |
19226 | xfree (actual_name); | |
19227 | return name; | |
19228 | } | |
19229 | } | |
19230 | } | |
19231 | ||
19232 | return NULL; | |
19233 | } | |
19234 | ||
96408a79 SA |
19235 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
19236 | prefix part in such case. See | |
19237 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19238 | ||
19239 | static char * | |
19240 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
19241 | { | |
19242 | struct attribute *attr; | |
e6a959d6 | 19243 | const char *base; |
96408a79 SA |
19244 | |
19245 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
19246 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
19247 | return NULL; | |
19248 | ||
7d45c7c3 | 19249 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
19250 | return NULL; |
19251 | ||
19252 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19253 | if (attr == NULL) | |
19254 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19255 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19256 | return NULL; | |
19257 | ||
19258 | /* dwarf2_name had to be already called. */ | |
19259 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
19260 | ||
19261 | /* Strip the base name, keep any leading namespaces/classes. */ | |
19262 | base = strrchr (DW_STRING (attr), ':'); | |
19263 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
19264 | return ""; | |
19265 | ||
224c3ddb SM |
19266 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
19267 | DW_STRING (attr), | |
19268 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
19269 | } |
19270 | ||
fdde2d81 | 19271 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 19272 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 19273 | |
0114d602 DJ |
19274 | For example, if we're within the method foo() in the following |
19275 | code: | |
19276 | ||
19277 | namespace N { | |
19278 | class C { | |
19279 | void foo () { | |
19280 | } | |
19281 | }; | |
19282 | } | |
19283 | ||
19284 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 19285 | |
0d5cff50 | 19286 | static const char * |
e142c38c | 19287 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 19288 | { |
0114d602 DJ |
19289 | struct die_info *parent, *spec_die; |
19290 | struct dwarf2_cu *spec_cu; | |
19291 | struct type *parent_type; | |
96408a79 | 19292 | char *retval; |
63d06c5c | 19293 | |
f55ee35c | 19294 | if (cu->language != language_cplus && cu->language != language_java |
45280282 | 19295 | && cu->language != language_fortran && cu->language != language_d) |
0114d602 DJ |
19296 | return ""; |
19297 | ||
96408a79 SA |
19298 | retval = anonymous_struct_prefix (die, cu); |
19299 | if (retval) | |
19300 | return retval; | |
19301 | ||
0114d602 DJ |
19302 | /* We have to be careful in the presence of DW_AT_specification. |
19303 | For example, with GCC 3.4, given the code | |
19304 | ||
19305 | namespace N { | |
19306 | void foo() { | |
19307 | // Definition of N::foo. | |
19308 | } | |
19309 | } | |
19310 | ||
19311 | then we'll have a tree of DIEs like this: | |
19312 | ||
19313 | 1: DW_TAG_compile_unit | |
19314 | 2: DW_TAG_namespace // N | |
19315 | 3: DW_TAG_subprogram // declaration of N::foo | |
19316 | 4: DW_TAG_subprogram // definition of N::foo | |
19317 | DW_AT_specification // refers to die #3 | |
19318 | ||
19319 | Thus, when processing die #4, we have to pretend that we're in | |
19320 | the context of its DW_AT_specification, namely the contex of die | |
19321 | #3. */ | |
19322 | spec_cu = cu; | |
19323 | spec_die = die_specification (die, &spec_cu); | |
19324 | if (spec_die == NULL) | |
19325 | parent = die->parent; | |
19326 | else | |
63d06c5c | 19327 | { |
0114d602 DJ |
19328 | parent = spec_die->parent; |
19329 | cu = spec_cu; | |
63d06c5c | 19330 | } |
0114d602 DJ |
19331 | |
19332 | if (parent == NULL) | |
19333 | return ""; | |
98bfdba5 PA |
19334 | else if (parent->building_fullname) |
19335 | { | |
19336 | const char *name; | |
19337 | const char *parent_name; | |
19338 | ||
19339 | /* It has been seen on RealView 2.2 built binaries, | |
19340 | DW_TAG_template_type_param types actually _defined_ as | |
19341 | children of the parent class: | |
19342 | ||
19343 | enum E {}; | |
19344 | template class <class Enum> Class{}; | |
19345 | Class<enum E> class_e; | |
19346 | ||
19347 | 1: DW_TAG_class_type (Class) | |
19348 | 2: DW_TAG_enumeration_type (E) | |
19349 | 3: DW_TAG_enumerator (enum1:0) | |
19350 | 3: DW_TAG_enumerator (enum2:1) | |
19351 | ... | |
19352 | 2: DW_TAG_template_type_param | |
19353 | DW_AT_type DW_FORM_ref_udata (E) | |
19354 | ||
19355 | Besides being broken debug info, it can put GDB into an | |
19356 | infinite loop. Consider: | |
19357 | ||
19358 | When we're building the full name for Class<E>, we'll start | |
19359 | at Class, and go look over its template type parameters, | |
19360 | finding E. We'll then try to build the full name of E, and | |
19361 | reach here. We're now trying to build the full name of E, | |
19362 | and look over the parent DIE for containing scope. In the | |
19363 | broken case, if we followed the parent DIE of E, we'd again | |
19364 | find Class, and once again go look at its template type | |
19365 | arguments, etc., etc. Simply don't consider such parent die | |
19366 | as source-level parent of this die (it can't be, the language | |
19367 | doesn't allow it), and break the loop here. */ | |
19368 | name = dwarf2_name (die, cu); | |
19369 | parent_name = dwarf2_name (parent, cu); | |
19370 | complaint (&symfile_complaints, | |
19371 | _("template param type '%s' defined within parent '%s'"), | |
19372 | name ? name : "<unknown>", | |
19373 | parent_name ? parent_name : "<unknown>"); | |
19374 | return ""; | |
19375 | } | |
63d06c5c | 19376 | else |
0114d602 DJ |
19377 | switch (parent->tag) |
19378 | { | |
63d06c5c | 19379 | case DW_TAG_namespace: |
0114d602 | 19380 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
19381 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
19382 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
19383 | Work around this problem here. */ | |
19384 | if (cu->language == language_cplus | |
19385 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
19386 | return ""; | |
0114d602 DJ |
19387 | /* We give a name to even anonymous namespaces. */ |
19388 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 19389 | case DW_TAG_class_type: |
680b30c7 | 19390 | case DW_TAG_interface_type: |
63d06c5c | 19391 | case DW_TAG_structure_type: |
0114d602 | 19392 | case DW_TAG_union_type: |
f55ee35c | 19393 | case DW_TAG_module: |
0114d602 DJ |
19394 | parent_type = read_type_die (parent, cu); |
19395 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
19396 | return TYPE_TAG_NAME (parent_type); | |
19397 | else | |
19398 | /* An anonymous structure is only allowed non-static data | |
19399 | members; no typedefs, no member functions, et cetera. | |
19400 | So it does not need a prefix. */ | |
19401 | return ""; | |
abc72ce4 | 19402 | case DW_TAG_compile_unit: |
95554aad | 19403 | case DW_TAG_partial_unit: |
abc72ce4 DE |
19404 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
19405 | if (cu->language == language_cplus | |
8b70b953 | 19406 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
19407 | && die->child != NULL |
19408 | && (die->tag == DW_TAG_class_type | |
19409 | || die->tag == DW_TAG_structure_type | |
19410 | || die->tag == DW_TAG_union_type)) | |
19411 | { | |
19412 | char *name = guess_full_die_structure_name (die, cu); | |
19413 | if (name != NULL) | |
19414 | return name; | |
19415 | } | |
19416 | return ""; | |
3d567982 TT |
19417 | case DW_TAG_enumeration_type: |
19418 | parent_type = read_type_die (parent, cu); | |
19419 | if (TYPE_DECLARED_CLASS (parent_type)) | |
19420 | { | |
19421 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
19422 | return TYPE_TAG_NAME (parent_type); | |
19423 | return ""; | |
19424 | } | |
19425 | /* Fall through. */ | |
63d06c5c | 19426 | default: |
8176b9b8 | 19427 | return determine_prefix (parent, cu); |
63d06c5c | 19428 | } |
63d06c5c DC |
19429 | } |
19430 | ||
3e43a32a MS |
19431 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
19432 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
19433 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
19434 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
19435 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 19436 | |
f55ee35c | 19437 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
19438 | |
19439 | static char * | |
f55ee35c JK |
19440 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
19441 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 19442 | { |
f55ee35c | 19443 | const char *lead = ""; |
5c315b68 | 19444 | const char *sep; |
63d06c5c | 19445 | |
3e43a32a MS |
19446 | if (suffix == NULL || suffix[0] == '\0' |
19447 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
19448 | sep = ""; |
19449 | else if (cu->language == language_java) | |
19450 | sep = "."; | |
45280282 IB |
19451 | else if (cu->language == language_d) |
19452 | { | |
19453 | /* For D, the 'main' function could be defined in any module, but it | |
19454 | should never be prefixed. */ | |
19455 | if (strcmp (suffix, "D main") == 0) | |
19456 | { | |
19457 | prefix = ""; | |
19458 | sep = ""; | |
19459 | } | |
19460 | else | |
19461 | sep = "."; | |
19462 | } | |
f55ee35c JK |
19463 | else if (cu->language == language_fortran && physname) |
19464 | { | |
19465 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
19466 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
19467 | ||
19468 | lead = "__"; | |
19469 | sep = "_MOD_"; | |
19470 | } | |
987504bb JJ |
19471 | else |
19472 | sep = "::"; | |
63d06c5c | 19473 | |
6dd47d34 DE |
19474 | if (prefix == NULL) |
19475 | prefix = ""; | |
19476 | if (suffix == NULL) | |
19477 | suffix = ""; | |
19478 | ||
987504bb JJ |
19479 | if (obs == NULL) |
19480 | { | |
3e43a32a | 19481 | char *retval |
224c3ddb SM |
19482 | = ((char *) |
19483 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 19484 | |
f55ee35c JK |
19485 | strcpy (retval, lead); |
19486 | strcat (retval, prefix); | |
6dd47d34 DE |
19487 | strcat (retval, sep); |
19488 | strcat (retval, suffix); | |
63d06c5c DC |
19489 | return retval; |
19490 | } | |
987504bb JJ |
19491 | else |
19492 | { | |
19493 | /* We have an obstack. */ | |
f55ee35c | 19494 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 19495 | } |
63d06c5c DC |
19496 | } |
19497 | ||
c906108c SS |
19498 | /* Return sibling of die, NULL if no sibling. */ |
19499 | ||
f9aca02d | 19500 | static struct die_info * |
fba45db2 | 19501 | sibling_die (struct die_info *die) |
c906108c | 19502 | { |
639d11d3 | 19503 | return die->sibling; |
c906108c SS |
19504 | } |
19505 | ||
71c25dea TT |
19506 | /* Get name of a die, return NULL if not found. */ |
19507 | ||
15d034d0 TT |
19508 | static const char * |
19509 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
19510 | struct obstack *obstack) |
19511 | { | |
19512 | if (name && cu->language == language_cplus) | |
19513 | { | |
19514 | char *canon_name = cp_canonicalize_string (name); | |
19515 | ||
19516 | if (canon_name != NULL) | |
19517 | { | |
19518 | if (strcmp (canon_name, name) != 0) | |
224c3ddb SM |
19519 | name = (const char *) obstack_copy0 (obstack, canon_name, |
19520 | strlen (canon_name)); | |
71c25dea TT |
19521 | xfree (canon_name); |
19522 | } | |
19523 | } | |
19524 | ||
19525 | return name; | |
c906108c SS |
19526 | } |
19527 | ||
96553a0c DE |
19528 | /* Get name of a die, return NULL if not found. |
19529 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 19530 | |
15d034d0 | 19531 | static const char * |
e142c38c | 19532 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
19533 | { |
19534 | struct attribute *attr; | |
19535 | ||
e142c38c | 19536 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 19537 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 19538 | && die->tag != DW_TAG_namespace |
53832f31 TT |
19539 | && die->tag != DW_TAG_class_type |
19540 | && die->tag != DW_TAG_interface_type | |
19541 | && die->tag != DW_TAG_structure_type | |
19542 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
19543 | return NULL; |
19544 | ||
19545 | switch (die->tag) | |
19546 | { | |
19547 | case DW_TAG_compile_unit: | |
95554aad | 19548 | case DW_TAG_partial_unit: |
71c25dea TT |
19549 | /* Compilation units have a DW_AT_name that is a filename, not |
19550 | a source language identifier. */ | |
19551 | case DW_TAG_enumeration_type: | |
19552 | case DW_TAG_enumerator: | |
19553 | /* These tags always have simple identifiers already; no need | |
19554 | to canonicalize them. */ | |
19555 | return DW_STRING (attr); | |
907af001 | 19556 | |
96553a0c DE |
19557 | case DW_TAG_namespace: |
19558 | if (attr != NULL && DW_STRING (attr) != NULL) | |
19559 | return DW_STRING (attr); | |
19560 | return CP_ANONYMOUS_NAMESPACE_STR; | |
19561 | ||
418835cc KS |
19562 | case DW_TAG_subprogram: |
19563 | /* Java constructors will all be named "<init>", so return | |
19564 | the class name when we see this special case. */ | |
19565 | if (cu->language == language_java | |
19566 | && DW_STRING (attr) != NULL | |
19567 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
19568 | { | |
19569 | struct dwarf2_cu *spec_cu = cu; | |
19570 | struct die_info *spec_die; | |
19571 | ||
19572 | /* GCJ will output '<init>' for Java constructor names. | |
19573 | For this special case, return the name of the parent class. */ | |
19574 | ||
cdc07690 | 19575 | /* GCJ may output subprogram DIEs with AT_specification set. |
418835cc KS |
19576 | If so, use the name of the specified DIE. */ |
19577 | spec_die = die_specification (die, &spec_cu); | |
19578 | if (spec_die != NULL) | |
19579 | return dwarf2_name (spec_die, spec_cu); | |
19580 | ||
19581 | do | |
19582 | { | |
19583 | die = die->parent; | |
19584 | if (die->tag == DW_TAG_class_type) | |
19585 | return dwarf2_name (die, cu); | |
19586 | } | |
95554aad TT |
19587 | while (die->tag != DW_TAG_compile_unit |
19588 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 19589 | } |
907af001 UW |
19590 | break; |
19591 | ||
19592 | case DW_TAG_class_type: | |
19593 | case DW_TAG_interface_type: | |
19594 | case DW_TAG_structure_type: | |
19595 | case DW_TAG_union_type: | |
19596 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
19597 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
19598 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
19599 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 19600 | if (attr && DW_STRING (attr) |
61012eef GB |
19601 | && (startswith (DW_STRING (attr), "._") |
19602 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 19603 | return NULL; |
53832f31 TT |
19604 | |
19605 | /* GCC might emit a nameless typedef that has a linkage name. See | |
19606 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19607 | if (!attr || DW_STRING (attr) == NULL) | |
19608 | { | |
df5c6c50 | 19609 | char *demangled = NULL; |
53832f31 TT |
19610 | |
19611 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19612 | if (attr == NULL) | |
19613 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19614 | ||
19615 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19616 | return NULL; | |
19617 | ||
df5c6c50 JK |
19618 | /* Avoid demangling DW_STRING (attr) the second time on a second |
19619 | call for the same DIE. */ | |
19620 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 19621 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
19622 | |
19623 | if (demangled) | |
19624 | { | |
e6a959d6 | 19625 | const char *base; |
96408a79 | 19626 | |
53832f31 | 19627 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 19628 | DW_STRING (attr) |
224c3ddb SM |
19629 | = ((const char *) |
19630 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
19631 | demangled, strlen (demangled))); | |
53832f31 TT |
19632 | DW_STRING_IS_CANONICAL (attr) = 1; |
19633 | xfree (demangled); | |
96408a79 SA |
19634 | |
19635 | /* Strip any leading namespaces/classes, keep only the base name. | |
19636 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
19637 | base = strrchr (DW_STRING (attr), ':'); | |
19638 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
19639 | return &base[1]; | |
19640 | else | |
19641 | return DW_STRING (attr); | |
53832f31 TT |
19642 | } |
19643 | } | |
907af001 UW |
19644 | break; |
19645 | ||
71c25dea | 19646 | default: |
907af001 UW |
19647 | break; |
19648 | } | |
19649 | ||
19650 | if (!DW_STRING_IS_CANONICAL (attr)) | |
19651 | { | |
19652 | DW_STRING (attr) | |
19653 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 19654 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 19655 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 19656 | } |
907af001 | 19657 | return DW_STRING (attr); |
9219021c DC |
19658 | } |
19659 | ||
19660 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
19661 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
19662 | containing the return value on output. */ | |
9219021c DC |
19663 | |
19664 | static struct die_info * | |
f2f0e013 | 19665 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
19666 | { |
19667 | struct attribute *attr; | |
9219021c | 19668 | |
f2f0e013 | 19669 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
19670 | if (attr == NULL) |
19671 | return NULL; | |
19672 | ||
f2f0e013 | 19673 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
19674 | } |
19675 | ||
c906108c SS |
19676 | /* Convert a DIE tag into its string name. */ |
19677 | ||
f39c6ffd | 19678 | static const char * |
aa1ee363 | 19679 | dwarf_tag_name (unsigned tag) |
c906108c | 19680 | { |
f39c6ffd TT |
19681 | const char *name = get_DW_TAG_name (tag); |
19682 | ||
19683 | if (name == NULL) | |
19684 | return "DW_TAG_<unknown>"; | |
19685 | ||
19686 | return name; | |
c906108c SS |
19687 | } |
19688 | ||
19689 | /* Convert a DWARF attribute code into its string name. */ | |
19690 | ||
f39c6ffd | 19691 | static const char * |
aa1ee363 | 19692 | dwarf_attr_name (unsigned attr) |
c906108c | 19693 | { |
f39c6ffd TT |
19694 | const char *name; |
19695 | ||
c764a876 | 19696 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
19697 | if (attr == DW_AT_MIPS_fde) |
19698 | return "DW_AT_MIPS_fde"; | |
19699 | #else | |
19700 | if (attr == DW_AT_HP_block_index) | |
19701 | return "DW_AT_HP_block_index"; | |
c764a876 | 19702 | #endif |
f39c6ffd TT |
19703 | |
19704 | name = get_DW_AT_name (attr); | |
19705 | ||
19706 | if (name == NULL) | |
19707 | return "DW_AT_<unknown>"; | |
19708 | ||
19709 | return name; | |
c906108c SS |
19710 | } |
19711 | ||
19712 | /* Convert a DWARF value form code into its string name. */ | |
19713 | ||
f39c6ffd | 19714 | static const char * |
aa1ee363 | 19715 | dwarf_form_name (unsigned form) |
c906108c | 19716 | { |
f39c6ffd TT |
19717 | const char *name = get_DW_FORM_name (form); |
19718 | ||
19719 | if (name == NULL) | |
19720 | return "DW_FORM_<unknown>"; | |
19721 | ||
19722 | return name; | |
c906108c SS |
19723 | } |
19724 | ||
19725 | static char * | |
fba45db2 | 19726 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
19727 | { |
19728 | if (mybool) | |
19729 | return "TRUE"; | |
19730 | else | |
19731 | return "FALSE"; | |
19732 | } | |
19733 | ||
19734 | /* Convert a DWARF type code into its string name. */ | |
19735 | ||
f39c6ffd | 19736 | static const char * |
aa1ee363 | 19737 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 19738 | { |
f39c6ffd | 19739 | const char *name = get_DW_ATE_name (enc); |
c906108c | 19740 | |
f39c6ffd TT |
19741 | if (name == NULL) |
19742 | return "DW_ATE_<unknown>"; | |
c906108c | 19743 | |
f39c6ffd | 19744 | return name; |
c906108c | 19745 | } |
c906108c | 19746 | |
f9aca02d | 19747 | static void |
d97bc12b | 19748 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
19749 | { |
19750 | unsigned int i; | |
19751 | ||
d97bc12b DE |
19752 | print_spaces (indent, f); |
19753 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 19754 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
19755 | |
19756 | if (die->parent != NULL) | |
19757 | { | |
19758 | print_spaces (indent, f); | |
19759 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 19760 | die->parent->offset.sect_off); |
d97bc12b DE |
19761 | } |
19762 | ||
19763 | print_spaces (indent, f); | |
19764 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 19765 | dwarf_bool_name (die->child != NULL)); |
c906108c | 19766 | |
d97bc12b DE |
19767 | print_spaces (indent, f); |
19768 | fprintf_unfiltered (f, " attributes:\n"); | |
19769 | ||
c906108c SS |
19770 | for (i = 0; i < die->num_attrs; ++i) |
19771 | { | |
d97bc12b DE |
19772 | print_spaces (indent, f); |
19773 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
19774 | dwarf_attr_name (die->attrs[i].name), |
19775 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 19776 | |
c906108c SS |
19777 | switch (die->attrs[i].form) |
19778 | { | |
c906108c | 19779 | case DW_FORM_addr: |
3019eac3 | 19780 | case DW_FORM_GNU_addr_index: |
d97bc12b | 19781 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 19782 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
19783 | break; |
19784 | case DW_FORM_block2: | |
19785 | case DW_FORM_block4: | |
19786 | case DW_FORM_block: | |
19787 | case DW_FORM_block1: | |
56eb65bd SP |
19788 | fprintf_unfiltered (f, "block: size %s", |
19789 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 19790 | break; |
2dc7f7b3 | 19791 | case DW_FORM_exprloc: |
56eb65bd SP |
19792 | fprintf_unfiltered (f, "expression: size %s", |
19793 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 19794 | break; |
4568ecf9 DE |
19795 | case DW_FORM_ref_addr: |
19796 | fprintf_unfiltered (f, "ref address: "); | |
19797 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19798 | break; | |
36586728 TT |
19799 | case DW_FORM_GNU_ref_alt: |
19800 | fprintf_unfiltered (f, "alt ref address: "); | |
19801 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19802 | break; | |
10b3939b DJ |
19803 | case DW_FORM_ref1: |
19804 | case DW_FORM_ref2: | |
19805 | case DW_FORM_ref4: | |
4568ecf9 DE |
19806 | case DW_FORM_ref8: |
19807 | case DW_FORM_ref_udata: | |
d97bc12b | 19808 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 19809 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 19810 | break; |
c906108c SS |
19811 | case DW_FORM_data1: |
19812 | case DW_FORM_data2: | |
19813 | case DW_FORM_data4: | |
ce5d95e1 | 19814 | case DW_FORM_data8: |
c906108c SS |
19815 | case DW_FORM_udata: |
19816 | case DW_FORM_sdata: | |
43bbcdc2 PH |
19817 | fprintf_unfiltered (f, "constant: %s", |
19818 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 19819 | break; |
2dc7f7b3 TT |
19820 | case DW_FORM_sec_offset: |
19821 | fprintf_unfiltered (f, "section offset: %s", | |
19822 | pulongest (DW_UNSND (&die->attrs[i]))); | |
19823 | break; | |
55f1336d | 19824 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
19825 | fprintf_unfiltered (f, "signature: %s", |
19826 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 19827 | break; |
c906108c | 19828 | case DW_FORM_string: |
4bdf3d34 | 19829 | case DW_FORM_strp: |
3019eac3 | 19830 | case DW_FORM_GNU_str_index: |
36586728 | 19831 | case DW_FORM_GNU_strp_alt: |
8285870a | 19832 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 19833 | DW_STRING (&die->attrs[i]) |
8285870a JK |
19834 | ? DW_STRING (&die->attrs[i]) : "", |
19835 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
19836 | break; |
19837 | case DW_FORM_flag: | |
19838 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 19839 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 19840 | else |
d97bc12b | 19841 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 19842 | break; |
2dc7f7b3 TT |
19843 | case DW_FORM_flag_present: |
19844 | fprintf_unfiltered (f, "flag: TRUE"); | |
19845 | break; | |
a8329558 | 19846 | case DW_FORM_indirect: |
0963b4bd MS |
19847 | /* The reader will have reduced the indirect form to |
19848 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
19849 | fprintf_unfiltered (f, |
19850 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 19851 | break; |
c906108c | 19852 | default: |
d97bc12b | 19853 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 19854 | die->attrs[i].form); |
d97bc12b | 19855 | break; |
c906108c | 19856 | } |
d97bc12b | 19857 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
19858 | } |
19859 | } | |
19860 | ||
f9aca02d | 19861 | static void |
d97bc12b | 19862 | dump_die_for_error (struct die_info *die) |
c906108c | 19863 | { |
d97bc12b DE |
19864 | dump_die_shallow (gdb_stderr, 0, die); |
19865 | } | |
19866 | ||
19867 | static void | |
19868 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
19869 | { | |
19870 | int indent = level * 4; | |
19871 | ||
19872 | gdb_assert (die != NULL); | |
19873 | ||
19874 | if (level >= max_level) | |
19875 | return; | |
19876 | ||
19877 | dump_die_shallow (f, indent, die); | |
19878 | ||
19879 | if (die->child != NULL) | |
c906108c | 19880 | { |
d97bc12b DE |
19881 | print_spaces (indent, f); |
19882 | fprintf_unfiltered (f, " Children:"); | |
19883 | if (level + 1 < max_level) | |
19884 | { | |
19885 | fprintf_unfiltered (f, "\n"); | |
19886 | dump_die_1 (f, level + 1, max_level, die->child); | |
19887 | } | |
19888 | else | |
19889 | { | |
3e43a32a MS |
19890 | fprintf_unfiltered (f, |
19891 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
19892 | } |
19893 | } | |
19894 | ||
19895 | if (die->sibling != NULL && level > 0) | |
19896 | { | |
19897 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
19898 | } |
19899 | } | |
19900 | ||
d97bc12b DE |
19901 | /* This is called from the pdie macro in gdbinit.in. |
19902 | It's not static so gcc will keep a copy callable from gdb. */ | |
19903 | ||
19904 | void | |
19905 | dump_die (struct die_info *die, int max_level) | |
19906 | { | |
19907 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
19908 | } | |
19909 | ||
f9aca02d | 19910 | static void |
51545339 | 19911 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19912 | { |
51545339 | 19913 | void **slot; |
c906108c | 19914 | |
b64f50a1 JK |
19915 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
19916 | INSERT); | |
51545339 DJ |
19917 | |
19918 | *slot = die; | |
c906108c SS |
19919 | } |
19920 | ||
b64f50a1 JK |
19921 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
19922 | required kind. */ | |
19923 | ||
19924 | static sect_offset | |
ff39bb5e | 19925 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 19926 | { |
4568ecf9 | 19927 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 19928 | |
7771576e | 19929 | if (attr_form_is_ref (attr)) |
b64f50a1 | 19930 | return retval; |
93311388 | 19931 | |
b64f50a1 | 19932 | retval.sect_off = 0; |
93311388 DE |
19933 | complaint (&symfile_complaints, |
19934 | _("unsupported die ref attribute form: '%s'"), | |
19935 | dwarf_form_name (attr->form)); | |
b64f50a1 | 19936 | return retval; |
c906108c SS |
19937 | } |
19938 | ||
43bbcdc2 PH |
19939 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
19940 | * the value held by the attribute is not constant. */ | |
a02abb62 | 19941 | |
43bbcdc2 | 19942 | static LONGEST |
ff39bb5e | 19943 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
19944 | { |
19945 | if (attr->form == DW_FORM_sdata) | |
19946 | return DW_SND (attr); | |
19947 | else if (attr->form == DW_FORM_udata | |
19948 | || attr->form == DW_FORM_data1 | |
19949 | || attr->form == DW_FORM_data2 | |
19950 | || attr->form == DW_FORM_data4 | |
19951 | || attr->form == DW_FORM_data8) | |
19952 | return DW_UNSND (attr); | |
19953 | else | |
19954 | { | |
3e43a32a MS |
19955 | complaint (&symfile_complaints, |
19956 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
19957 | dwarf_form_name (attr->form)); |
19958 | return default_value; | |
19959 | } | |
19960 | } | |
19961 | ||
348e048f DE |
19962 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
19963 | On entry *REF_CU is the CU of SRC_DIE. | |
19964 | On exit *REF_CU is the CU of the result. */ | |
19965 | ||
19966 | static struct die_info * | |
ff39bb5e | 19967 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
19968 | struct dwarf2_cu **ref_cu) |
19969 | { | |
19970 | struct die_info *die; | |
19971 | ||
7771576e | 19972 | if (attr_form_is_ref (attr)) |
348e048f | 19973 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 19974 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
19975 | die = follow_die_sig (src_die, attr, ref_cu); |
19976 | else | |
19977 | { | |
19978 | dump_die_for_error (src_die); | |
19979 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 19980 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
19981 | } |
19982 | ||
19983 | return die; | |
03dd20cc DJ |
19984 | } |
19985 | ||
5c631832 | 19986 | /* Follow reference OFFSET. |
673bfd45 DE |
19987 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
19988 | On exit *REF_CU is the CU of the result. | |
19989 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 19990 | |
f9aca02d | 19991 | static struct die_info * |
36586728 TT |
19992 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
19993 | struct dwarf2_cu **ref_cu) | |
c906108c | 19994 | { |
10b3939b | 19995 | struct die_info temp_die; |
f2f0e013 | 19996 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 19997 | |
348e048f DE |
19998 | gdb_assert (cu->per_cu != NULL); |
19999 | ||
98bfdba5 PA |
20000 | target_cu = cu; |
20001 | ||
3019eac3 | 20002 | if (cu->per_cu->is_debug_types) |
348e048f DE |
20003 | { |
20004 | /* .debug_types CUs cannot reference anything outside their CU. | |
20005 | If they need to, they have to reference a signatured type via | |
55f1336d | 20006 | DW_FORM_ref_sig8. */ |
348e048f | 20007 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 20008 | return NULL; |
348e048f | 20009 | } |
36586728 TT |
20010 | else if (offset_in_dwz != cu->per_cu->is_dwz |
20011 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
20012 | { |
20013 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 20014 | |
36586728 TT |
20015 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
20016 | cu->objfile); | |
03dd20cc DJ |
20017 | |
20018 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
20019 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
20020 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 20021 | |
10b3939b DJ |
20022 | target_cu = per_cu->cu; |
20023 | } | |
98bfdba5 PA |
20024 | else if (cu->dies == NULL) |
20025 | { | |
20026 | /* We're loading full DIEs during partial symbol reading. */ | |
20027 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 20028 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 20029 | } |
c906108c | 20030 | |
f2f0e013 | 20031 | *ref_cu = target_cu; |
51545339 | 20032 | temp_die.offset = offset; |
9a3c8263 SM |
20033 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
20034 | &temp_die, offset.sect_off); | |
5c631832 | 20035 | } |
10b3939b | 20036 | |
5c631832 JK |
20037 | /* Follow reference attribute ATTR of SRC_DIE. |
20038 | On entry *REF_CU is the CU of SRC_DIE. | |
20039 | On exit *REF_CU is the CU of the result. */ | |
20040 | ||
20041 | static struct die_info * | |
ff39bb5e | 20042 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
20043 | struct dwarf2_cu **ref_cu) |
20044 | { | |
b64f50a1 | 20045 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
20046 | struct dwarf2_cu *cu = *ref_cu; |
20047 | struct die_info *die; | |
20048 | ||
36586728 TT |
20049 | die = follow_die_offset (offset, |
20050 | (attr->form == DW_FORM_GNU_ref_alt | |
20051 | || cu->per_cu->is_dwz), | |
20052 | ref_cu); | |
5c631832 JK |
20053 | if (!die) |
20054 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
20055 | "at 0x%x [in module %s]"), | |
4262abfb JK |
20056 | offset.sect_off, src_die->offset.sect_off, |
20057 | objfile_name (cu->objfile)); | |
348e048f | 20058 | |
5c631832 JK |
20059 | return die; |
20060 | } | |
20061 | ||
d83e736b JK |
20062 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
20063 | Returned value is intended for DW_OP_call*. Returned | |
20064 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
20065 | |
20066 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
20067 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
20068 | struct dwarf2_per_cu_data *per_cu, | |
20069 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20070 | void *baton) | |
5c631832 | 20071 | { |
918dd910 | 20072 | struct dwarf2_cu *cu; |
5c631832 JK |
20073 | struct die_info *die; |
20074 | struct attribute *attr; | |
20075 | struct dwarf2_locexpr_baton retval; | |
20076 | ||
8cf6f0b1 TT |
20077 | dw2_setup (per_cu->objfile); |
20078 | ||
918dd910 JK |
20079 | if (per_cu->cu == NULL) |
20080 | load_cu (per_cu); | |
20081 | cu = per_cu->cu; | |
cc12ce38 DE |
20082 | if (cu == NULL) |
20083 | { | |
20084 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20085 | Instead just throw an error, not much else we can do. */ | |
20086 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
20087 | offset.sect_off, objfile_name (per_cu->objfile)); | |
20088 | } | |
918dd910 | 20089 | |
36586728 | 20090 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
20091 | if (!die) |
20092 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 20093 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
20094 | |
20095 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
20096 | if (!attr) | |
20097 | { | |
e103e986 JK |
20098 | /* DWARF: "If there is no such attribute, then there is no effect.". |
20099 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 20100 | |
e103e986 | 20101 | retval.data = NULL; |
5c631832 JK |
20102 | retval.size = 0; |
20103 | } | |
8cf6f0b1 TT |
20104 | else if (attr_form_is_section_offset (attr)) |
20105 | { | |
20106 | struct dwarf2_loclist_baton loclist_baton; | |
20107 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
20108 | size_t size; | |
20109 | ||
20110 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
20111 | ||
20112 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
20113 | &size, pc); | |
20114 | retval.size = size; | |
20115 | } | |
5c631832 JK |
20116 | else |
20117 | { | |
20118 | if (!attr_form_is_block (attr)) | |
20119 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
20120 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 20121 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
20122 | |
20123 | retval.data = DW_BLOCK (attr)->data; | |
20124 | retval.size = DW_BLOCK (attr)->size; | |
20125 | } | |
20126 | retval.per_cu = cu->per_cu; | |
918dd910 | 20127 | |
918dd910 JK |
20128 | age_cached_comp_units (); |
20129 | ||
5c631832 | 20130 | return retval; |
348e048f DE |
20131 | } |
20132 | ||
8b9737bf TT |
20133 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
20134 | offset. */ | |
20135 | ||
20136 | struct dwarf2_locexpr_baton | |
20137 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
20138 | struct dwarf2_per_cu_data *per_cu, | |
20139 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20140 | void *baton) | |
20141 | { | |
20142 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
20143 | ||
20144 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
20145 | } | |
20146 | ||
b6807d98 TT |
20147 | /* Write a constant of a given type as target-ordered bytes into |
20148 | OBSTACK. */ | |
20149 | ||
20150 | static const gdb_byte * | |
20151 | write_constant_as_bytes (struct obstack *obstack, | |
20152 | enum bfd_endian byte_order, | |
20153 | struct type *type, | |
20154 | ULONGEST value, | |
20155 | LONGEST *len) | |
20156 | { | |
20157 | gdb_byte *result; | |
20158 | ||
20159 | *len = TYPE_LENGTH (type); | |
224c3ddb | 20160 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20161 | store_unsigned_integer (result, *len, byte_order, value); |
20162 | ||
20163 | return result; | |
20164 | } | |
20165 | ||
20166 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
20167 | pointer to the constant bytes and set LEN to the length of the | |
20168 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
20169 | does not have a DW_AT_const_value, return NULL. */ | |
20170 | ||
20171 | const gdb_byte * | |
20172 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
20173 | struct dwarf2_per_cu_data *per_cu, | |
20174 | struct obstack *obstack, | |
20175 | LONGEST *len) | |
20176 | { | |
20177 | struct dwarf2_cu *cu; | |
20178 | struct die_info *die; | |
20179 | struct attribute *attr; | |
20180 | const gdb_byte *result = NULL; | |
20181 | struct type *type; | |
20182 | LONGEST value; | |
20183 | enum bfd_endian byte_order; | |
20184 | ||
20185 | dw2_setup (per_cu->objfile); | |
20186 | ||
20187 | if (per_cu->cu == NULL) | |
20188 | load_cu (per_cu); | |
20189 | cu = per_cu->cu; | |
cc12ce38 DE |
20190 | if (cu == NULL) |
20191 | { | |
20192 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20193 | Instead just throw an error, not much else we can do. */ | |
20194 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
20195 | offset.sect_off, objfile_name (per_cu->objfile)); | |
20196 | } | |
b6807d98 TT |
20197 | |
20198 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
20199 | if (!die) | |
20200 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 20201 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
20202 | |
20203 | ||
20204 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
20205 | if (attr == NULL) | |
20206 | return NULL; | |
20207 | ||
20208 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
20209 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20210 | ||
20211 | switch (attr->form) | |
20212 | { | |
20213 | case DW_FORM_addr: | |
20214 | case DW_FORM_GNU_addr_index: | |
20215 | { | |
20216 | gdb_byte *tem; | |
20217 | ||
20218 | *len = cu->header.addr_size; | |
224c3ddb | 20219 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20220 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
20221 | result = tem; | |
20222 | } | |
20223 | break; | |
20224 | case DW_FORM_string: | |
20225 | case DW_FORM_strp: | |
20226 | case DW_FORM_GNU_str_index: | |
20227 | case DW_FORM_GNU_strp_alt: | |
20228 | /* DW_STRING is already allocated on the objfile obstack, point | |
20229 | directly to it. */ | |
20230 | result = (const gdb_byte *) DW_STRING (attr); | |
20231 | *len = strlen (DW_STRING (attr)); | |
20232 | break; | |
20233 | case DW_FORM_block1: | |
20234 | case DW_FORM_block2: | |
20235 | case DW_FORM_block4: | |
20236 | case DW_FORM_block: | |
20237 | case DW_FORM_exprloc: | |
20238 | result = DW_BLOCK (attr)->data; | |
20239 | *len = DW_BLOCK (attr)->size; | |
20240 | break; | |
20241 | ||
20242 | /* The DW_AT_const_value attributes are supposed to carry the | |
20243 | symbol's value "represented as it would be on the target | |
20244 | architecture." By the time we get here, it's already been | |
20245 | converted to host endianness, so we just need to sign- or | |
20246 | zero-extend it as appropriate. */ | |
20247 | case DW_FORM_data1: | |
20248 | type = die_type (die, cu); | |
20249 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
20250 | if (result == NULL) | |
20251 | result = write_constant_as_bytes (obstack, byte_order, | |
20252 | type, value, len); | |
20253 | break; | |
20254 | case DW_FORM_data2: | |
20255 | type = die_type (die, cu); | |
20256 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
20257 | if (result == NULL) | |
20258 | result = write_constant_as_bytes (obstack, byte_order, | |
20259 | type, value, len); | |
20260 | break; | |
20261 | case DW_FORM_data4: | |
20262 | type = die_type (die, cu); | |
20263 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
20264 | if (result == NULL) | |
20265 | result = write_constant_as_bytes (obstack, byte_order, | |
20266 | type, value, len); | |
20267 | break; | |
20268 | case DW_FORM_data8: | |
20269 | type = die_type (die, cu); | |
20270 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
20271 | if (result == NULL) | |
20272 | result = write_constant_as_bytes (obstack, byte_order, | |
20273 | type, value, len); | |
20274 | break; | |
20275 | ||
20276 | case DW_FORM_sdata: | |
20277 | type = die_type (die, cu); | |
20278 | result = write_constant_as_bytes (obstack, byte_order, | |
20279 | type, DW_SND (attr), len); | |
20280 | break; | |
20281 | ||
20282 | case DW_FORM_udata: | |
20283 | type = die_type (die, cu); | |
20284 | result = write_constant_as_bytes (obstack, byte_order, | |
20285 | type, DW_UNSND (attr), len); | |
20286 | break; | |
20287 | ||
20288 | default: | |
20289 | complaint (&symfile_complaints, | |
20290 | _("unsupported const value attribute form: '%s'"), | |
20291 | dwarf_form_name (attr->form)); | |
20292 | break; | |
20293 | } | |
20294 | ||
20295 | return result; | |
20296 | } | |
20297 | ||
8a9b8146 TT |
20298 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
20299 | PER_CU. */ | |
20300 | ||
20301 | struct type * | |
b64f50a1 | 20302 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
20303 | struct dwarf2_per_cu_data *per_cu) |
20304 | { | |
b64f50a1 JK |
20305 | sect_offset die_offset_sect; |
20306 | ||
8a9b8146 | 20307 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
20308 | |
20309 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
20310 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
20311 | } |
20312 | ||
ac9ec31b | 20313 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 20314 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
20315 | On exit *REF_CU is the CU of the result. |
20316 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
20317 | |
20318 | static struct die_info * | |
ac9ec31b DE |
20319 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
20320 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
20321 | { |
20322 | struct objfile *objfile = (*ref_cu)->objfile; | |
20323 | struct die_info temp_die; | |
348e048f DE |
20324 | struct dwarf2_cu *sig_cu; |
20325 | struct die_info *die; | |
20326 | ||
ac9ec31b DE |
20327 | /* While it might be nice to assert sig_type->type == NULL here, |
20328 | we can get here for DW_AT_imported_declaration where we need | |
20329 | the DIE not the type. */ | |
348e048f DE |
20330 | |
20331 | /* If necessary, add it to the queue and load its DIEs. */ | |
20332 | ||
95554aad | 20333 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 20334 | read_signatured_type (sig_type); |
348e048f | 20335 | |
348e048f | 20336 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 20337 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
20338 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
20339 | temp_die.offset = sig_type->type_offset_in_section; | |
9a3c8263 SM |
20340 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
20341 | temp_die.offset.sect_off); | |
348e048f DE |
20342 | if (die) |
20343 | { | |
796a7ff8 DE |
20344 | /* For .gdb_index version 7 keep track of included TUs. |
20345 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
20346 | if (dwarf2_per_objfile->index_table != NULL | |
20347 | && dwarf2_per_objfile->index_table->version <= 7) | |
20348 | { | |
20349 | VEC_safe_push (dwarf2_per_cu_ptr, | |
20350 | (*ref_cu)->per_cu->imported_symtabs, | |
20351 | sig_cu->per_cu); | |
20352 | } | |
20353 | ||
348e048f DE |
20354 | *ref_cu = sig_cu; |
20355 | return die; | |
20356 | } | |
20357 | ||
ac9ec31b DE |
20358 | return NULL; |
20359 | } | |
20360 | ||
20361 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
20362 | On entry *REF_CU is the CU of SRC_DIE. | |
20363 | On exit *REF_CU is the CU of the result. | |
20364 | The result is the DIE of the type. | |
20365 | If the referenced type cannot be found an error is thrown. */ | |
20366 | ||
20367 | static struct die_info * | |
ff39bb5e | 20368 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
20369 | struct dwarf2_cu **ref_cu) |
20370 | { | |
20371 | ULONGEST signature = DW_SIGNATURE (attr); | |
20372 | struct signatured_type *sig_type; | |
20373 | struct die_info *die; | |
20374 | ||
20375 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
20376 | ||
a2ce51a0 | 20377 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
20378 | /* sig_type will be NULL if the signatured type is missing from |
20379 | the debug info. */ | |
20380 | if (sig_type == NULL) | |
20381 | { | |
20382 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
20383 | " from DIE at 0x%x [in module %s]"), | |
20384 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 20385 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
20386 | } |
20387 | ||
20388 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
20389 | if (die == NULL) | |
20390 | { | |
20391 | dump_die_for_error (src_die); | |
20392 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
20393 | " from DIE at 0x%x [in module %s]"), | |
20394 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 20395 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
20396 | } |
20397 | ||
20398 | return die; | |
20399 | } | |
20400 | ||
20401 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
20402 | reading in and processing the type unit if necessary. */ | |
20403 | ||
20404 | static struct type * | |
20405 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
20406 | struct dwarf2_cu *cu) | |
20407 | { | |
20408 | struct signatured_type *sig_type; | |
20409 | struct dwarf2_cu *type_cu; | |
20410 | struct die_info *type_die; | |
20411 | struct type *type; | |
20412 | ||
a2ce51a0 | 20413 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
20414 | /* sig_type will be NULL if the signatured type is missing from |
20415 | the debug info. */ | |
20416 | if (sig_type == NULL) | |
20417 | { | |
20418 | complaint (&symfile_complaints, | |
20419 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
20420 | " from DIE at 0x%x [in module %s]"), | |
20421 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20422 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20423 | return build_error_marker_type (cu, die); |
20424 | } | |
20425 | ||
20426 | /* If we already know the type we're done. */ | |
20427 | if (sig_type->type != NULL) | |
20428 | return sig_type->type; | |
20429 | ||
20430 | type_cu = cu; | |
20431 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
20432 | if (type_die != NULL) | |
20433 | { | |
20434 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
20435 | is created. This is important, for example, because for c++ classes | |
20436 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
20437 | type = read_type_die (type_die, type_cu); | |
20438 | if (type == NULL) | |
20439 | { | |
20440 | complaint (&symfile_complaints, | |
20441 | _("Dwarf Error: Cannot build signatured type %s" | |
20442 | " referenced from DIE at 0x%x [in module %s]"), | |
20443 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20444 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20445 | type = build_error_marker_type (cu, die); |
20446 | } | |
20447 | } | |
20448 | else | |
20449 | { | |
20450 | complaint (&symfile_complaints, | |
20451 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
20452 | " from DIE at 0x%x [in module %s]"), | |
20453 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20454 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20455 | type = build_error_marker_type (cu, die); |
20456 | } | |
20457 | sig_type->type = type; | |
20458 | ||
20459 | return type; | |
20460 | } | |
20461 | ||
20462 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
20463 | reading in and processing the type unit if necessary. */ | |
20464 | ||
20465 | static struct type * | |
ff39bb5e | 20466 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 20467 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
20468 | { |
20469 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 20470 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20471 | { |
20472 | struct dwarf2_cu *type_cu = cu; | |
20473 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
20474 | ||
20475 | return read_type_die (type_die, type_cu); | |
20476 | } | |
20477 | else if (attr->form == DW_FORM_ref_sig8) | |
20478 | { | |
20479 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
20480 | } | |
20481 | else | |
20482 | { | |
20483 | complaint (&symfile_complaints, | |
20484 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
20485 | " at 0x%x [in module %s]"), | |
20486 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 20487 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20488 | return build_error_marker_type (cu, die); |
20489 | } | |
348e048f DE |
20490 | } |
20491 | ||
e5fe5e75 | 20492 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
20493 | |
20494 | static void | |
e5fe5e75 | 20495 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 20496 | { |
52dc124a | 20497 | struct signatured_type *sig_type; |
348e048f | 20498 | |
f4dc4d17 DE |
20499 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
20500 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
20501 | ||
6721b2ec DE |
20502 | /* We have the per_cu, but we need the signatured_type. |
20503 | Fortunately this is an easy translation. */ | |
20504 | gdb_assert (per_cu->is_debug_types); | |
20505 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 20506 | |
6721b2ec | 20507 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20508 | |
52dc124a | 20509 | read_signatured_type (sig_type); |
348e048f | 20510 | |
6721b2ec | 20511 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
20512 | } |
20513 | ||
dee91e82 DE |
20514 | /* die_reader_func for read_signatured_type. |
20515 | This is identical to load_full_comp_unit_reader, | |
20516 | but is kept separate for now. */ | |
348e048f DE |
20517 | |
20518 | static void | |
dee91e82 | 20519 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 20520 | const gdb_byte *info_ptr, |
dee91e82 DE |
20521 | struct die_info *comp_unit_die, |
20522 | int has_children, | |
20523 | void *data) | |
348e048f | 20524 | { |
dee91e82 | 20525 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 20526 | |
dee91e82 DE |
20527 | gdb_assert (cu->die_hash == NULL); |
20528 | cu->die_hash = | |
20529 | htab_create_alloc_ex (cu->header.length / 12, | |
20530 | die_hash, | |
20531 | die_eq, | |
20532 | NULL, | |
20533 | &cu->comp_unit_obstack, | |
20534 | hashtab_obstack_allocate, | |
20535 | dummy_obstack_deallocate); | |
348e048f | 20536 | |
dee91e82 DE |
20537 | if (has_children) |
20538 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
20539 | &info_ptr, comp_unit_die); | |
20540 | cu->dies = comp_unit_die; | |
20541 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
20542 | |
20543 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 20544 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 20545 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
20546 | or we won't be able to build types correctly. |
20547 | Similarly, if we do not read the producer, we can not apply | |
20548 | producer-specific interpretation. */ | |
95554aad | 20549 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 20550 | } |
348e048f | 20551 | |
3019eac3 DE |
20552 | /* Read in a signatured type and build its CU and DIEs. |
20553 | If the type is a stub for the real type in a DWO file, | |
20554 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
20555 | |
20556 | static void | |
20557 | read_signatured_type (struct signatured_type *sig_type) | |
20558 | { | |
20559 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 20560 | |
3019eac3 | 20561 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 20562 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20563 | |
f4dc4d17 DE |
20564 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
20565 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 20566 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
20567 | } |
20568 | ||
c906108c SS |
20569 | /* Decode simple location descriptions. |
20570 | Given a pointer to a dwarf block that defines a location, compute | |
20571 | the location and return the value. | |
20572 | ||
4cecd739 DJ |
20573 | NOTE drow/2003-11-18: This function is called in two situations |
20574 | now: for the address of static or global variables (partial symbols | |
20575 | only) and for offsets into structures which are expected to be | |
20576 | (more or less) constant. The partial symbol case should go away, | |
20577 | and only the constant case should remain. That will let this | |
20578 | function complain more accurately. A few special modes are allowed | |
20579 | without complaint for global variables (for instance, global | |
20580 | register values and thread-local values). | |
c906108c SS |
20581 | |
20582 | A location description containing no operations indicates that the | |
4cecd739 | 20583 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
20584 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
20585 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
20586 | complaint. |
20587 | ||
20588 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
20589 | |
20590 | static CORE_ADDR | |
e7c27a73 | 20591 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 20592 | { |
e7c27a73 | 20593 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
20594 | size_t i; |
20595 | size_t size = blk->size; | |
d521ce57 | 20596 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
20597 | CORE_ADDR stack[64]; |
20598 | int stacki; | |
20599 | unsigned int bytes_read, unsnd; | |
20600 | gdb_byte op; | |
c906108c | 20601 | |
21ae7a4d JK |
20602 | i = 0; |
20603 | stacki = 0; | |
20604 | stack[stacki] = 0; | |
20605 | stack[++stacki] = 0; | |
20606 | ||
20607 | while (i < size) | |
20608 | { | |
20609 | op = data[i++]; | |
20610 | switch (op) | |
20611 | { | |
20612 | case DW_OP_lit0: | |
20613 | case DW_OP_lit1: | |
20614 | case DW_OP_lit2: | |
20615 | case DW_OP_lit3: | |
20616 | case DW_OP_lit4: | |
20617 | case DW_OP_lit5: | |
20618 | case DW_OP_lit6: | |
20619 | case DW_OP_lit7: | |
20620 | case DW_OP_lit8: | |
20621 | case DW_OP_lit9: | |
20622 | case DW_OP_lit10: | |
20623 | case DW_OP_lit11: | |
20624 | case DW_OP_lit12: | |
20625 | case DW_OP_lit13: | |
20626 | case DW_OP_lit14: | |
20627 | case DW_OP_lit15: | |
20628 | case DW_OP_lit16: | |
20629 | case DW_OP_lit17: | |
20630 | case DW_OP_lit18: | |
20631 | case DW_OP_lit19: | |
20632 | case DW_OP_lit20: | |
20633 | case DW_OP_lit21: | |
20634 | case DW_OP_lit22: | |
20635 | case DW_OP_lit23: | |
20636 | case DW_OP_lit24: | |
20637 | case DW_OP_lit25: | |
20638 | case DW_OP_lit26: | |
20639 | case DW_OP_lit27: | |
20640 | case DW_OP_lit28: | |
20641 | case DW_OP_lit29: | |
20642 | case DW_OP_lit30: | |
20643 | case DW_OP_lit31: | |
20644 | stack[++stacki] = op - DW_OP_lit0; | |
20645 | break; | |
f1bea926 | 20646 | |
21ae7a4d JK |
20647 | case DW_OP_reg0: |
20648 | case DW_OP_reg1: | |
20649 | case DW_OP_reg2: | |
20650 | case DW_OP_reg3: | |
20651 | case DW_OP_reg4: | |
20652 | case DW_OP_reg5: | |
20653 | case DW_OP_reg6: | |
20654 | case DW_OP_reg7: | |
20655 | case DW_OP_reg8: | |
20656 | case DW_OP_reg9: | |
20657 | case DW_OP_reg10: | |
20658 | case DW_OP_reg11: | |
20659 | case DW_OP_reg12: | |
20660 | case DW_OP_reg13: | |
20661 | case DW_OP_reg14: | |
20662 | case DW_OP_reg15: | |
20663 | case DW_OP_reg16: | |
20664 | case DW_OP_reg17: | |
20665 | case DW_OP_reg18: | |
20666 | case DW_OP_reg19: | |
20667 | case DW_OP_reg20: | |
20668 | case DW_OP_reg21: | |
20669 | case DW_OP_reg22: | |
20670 | case DW_OP_reg23: | |
20671 | case DW_OP_reg24: | |
20672 | case DW_OP_reg25: | |
20673 | case DW_OP_reg26: | |
20674 | case DW_OP_reg27: | |
20675 | case DW_OP_reg28: | |
20676 | case DW_OP_reg29: | |
20677 | case DW_OP_reg30: | |
20678 | case DW_OP_reg31: | |
20679 | stack[++stacki] = op - DW_OP_reg0; | |
20680 | if (i < size) | |
20681 | dwarf2_complex_location_expr_complaint (); | |
20682 | break; | |
c906108c | 20683 | |
21ae7a4d JK |
20684 | case DW_OP_regx: |
20685 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
20686 | i += bytes_read; | |
20687 | stack[++stacki] = unsnd; | |
20688 | if (i < size) | |
20689 | dwarf2_complex_location_expr_complaint (); | |
20690 | break; | |
c906108c | 20691 | |
21ae7a4d JK |
20692 | case DW_OP_addr: |
20693 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
20694 | cu, &bytes_read); | |
20695 | i += bytes_read; | |
20696 | break; | |
d53d4ac5 | 20697 | |
21ae7a4d JK |
20698 | case DW_OP_const1u: |
20699 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
20700 | i += 1; | |
20701 | break; | |
20702 | ||
20703 | case DW_OP_const1s: | |
20704 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
20705 | i += 1; | |
20706 | break; | |
20707 | ||
20708 | case DW_OP_const2u: | |
20709 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
20710 | i += 2; | |
20711 | break; | |
20712 | ||
20713 | case DW_OP_const2s: | |
20714 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
20715 | i += 2; | |
20716 | break; | |
d53d4ac5 | 20717 | |
21ae7a4d JK |
20718 | case DW_OP_const4u: |
20719 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
20720 | i += 4; | |
20721 | break; | |
20722 | ||
20723 | case DW_OP_const4s: | |
20724 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
20725 | i += 4; | |
20726 | break; | |
20727 | ||
585861ea JK |
20728 | case DW_OP_const8u: |
20729 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
20730 | i += 8; | |
20731 | break; | |
20732 | ||
21ae7a4d JK |
20733 | case DW_OP_constu: |
20734 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
20735 | &bytes_read); | |
20736 | i += bytes_read; | |
20737 | break; | |
20738 | ||
20739 | case DW_OP_consts: | |
20740 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
20741 | i += bytes_read; | |
20742 | break; | |
20743 | ||
20744 | case DW_OP_dup: | |
20745 | stack[stacki + 1] = stack[stacki]; | |
20746 | stacki++; | |
20747 | break; | |
20748 | ||
20749 | case DW_OP_plus: | |
20750 | stack[stacki - 1] += stack[stacki]; | |
20751 | stacki--; | |
20752 | break; | |
20753 | ||
20754 | case DW_OP_plus_uconst: | |
20755 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
20756 | &bytes_read); | |
20757 | i += bytes_read; | |
20758 | break; | |
20759 | ||
20760 | case DW_OP_minus: | |
20761 | stack[stacki - 1] -= stack[stacki]; | |
20762 | stacki--; | |
20763 | break; | |
20764 | ||
20765 | case DW_OP_deref: | |
20766 | /* If we're not the last op, then we definitely can't encode | |
20767 | this using GDB's address_class enum. This is valid for partial | |
20768 | global symbols, although the variable's address will be bogus | |
20769 | in the psymtab. */ | |
20770 | if (i < size) | |
20771 | dwarf2_complex_location_expr_complaint (); | |
20772 | break; | |
20773 | ||
20774 | case DW_OP_GNU_push_tls_address: | |
20775 | /* The top of the stack has the offset from the beginning | |
20776 | of the thread control block at which the variable is located. */ | |
20777 | /* Nothing should follow this operator, so the top of stack would | |
20778 | be returned. */ | |
20779 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
20780 | address will be bogus in the psymtab. Make it always at least |
20781 | non-zero to not look as a variable garbage collected by linker | |
20782 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
20783 | if (i < size) |
20784 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 20785 | stack[stacki]++; |
21ae7a4d JK |
20786 | break; |
20787 | ||
20788 | case DW_OP_GNU_uninit: | |
20789 | break; | |
20790 | ||
3019eac3 | 20791 | case DW_OP_GNU_addr_index: |
49f6c839 | 20792 | case DW_OP_GNU_const_index: |
3019eac3 DE |
20793 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
20794 | &bytes_read); | |
20795 | i += bytes_read; | |
20796 | break; | |
20797 | ||
21ae7a4d JK |
20798 | default: |
20799 | { | |
f39c6ffd | 20800 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
20801 | |
20802 | if (name) | |
20803 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
20804 | name); | |
20805 | else | |
20806 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
20807 | op); | |
20808 | } | |
20809 | ||
20810 | return (stack[stacki]); | |
d53d4ac5 | 20811 | } |
3c6e0cb3 | 20812 | |
21ae7a4d JK |
20813 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
20814 | outside of the allocated space. Also enforce minimum>0. */ | |
20815 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
20816 | { | |
20817 | complaint (&symfile_complaints, | |
20818 | _("location description stack overflow")); | |
20819 | return 0; | |
20820 | } | |
20821 | ||
20822 | if (stacki <= 0) | |
20823 | { | |
20824 | complaint (&symfile_complaints, | |
20825 | _("location description stack underflow")); | |
20826 | return 0; | |
20827 | } | |
20828 | } | |
20829 | return (stack[stacki]); | |
c906108c SS |
20830 | } |
20831 | ||
20832 | /* memory allocation interface */ | |
20833 | ||
c906108c | 20834 | static struct dwarf_block * |
7b5a2f43 | 20835 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 20836 | { |
8d749320 | 20837 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
20838 | } |
20839 | ||
c906108c | 20840 | static struct die_info * |
b60c80d6 | 20841 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
20842 | { |
20843 | struct die_info *die; | |
b60c80d6 DJ |
20844 | size_t size = sizeof (struct die_info); |
20845 | ||
20846 | if (num_attrs > 1) | |
20847 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 20848 | |
b60c80d6 | 20849 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
20850 | memset (die, 0, sizeof (struct die_info)); |
20851 | return (die); | |
20852 | } | |
2e276125 JB |
20853 | |
20854 | \f | |
20855 | /* Macro support. */ | |
20856 | ||
233d95b5 JK |
20857 | /* Return file name relative to the compilation directory of file number I in |
20858 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 20859 | responsible for freeing it. */ |
233d95b5 | 20860 | |
2e276125 | 20861 | static char * |
233d95b5 | 20862 | file_file_name (int file, struct line_header *lh) |
2e276125 | 20863 | { |
6a83a1e6 EZ |
20864 | /* Is the file number a valid index into the line header's file name |
20865 | table? Remember that file numbers start with one, not zero. */ | |
20866 | if (1 <= file && file <= lh->num_file_names) | |
20867 | { | |
20868 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 20869 | |
afa6c9ab SL |
20870 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0 |
20871 | || lh->include_dirs == NULL) | |
6a83a1e6 | 20872 | return xstrdup (fe->name); |
233d95b5 JK |
20873 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
20874 | fe->name, NULL); | |
6a83a1e6 | 20875 | } |
2e276125 JB |
20876 | else |
20877 | { | |
6a83a1e6 EZ |
20878 | /* The compiler produced a bogus file number. We can at least |
20879 | record the macro definitions made in the file, even if we | |
20880 | won't be able to find the file by name. */ | |
20881 | char fake_name[80]; | |
9a619af0 | 20882 | |
8c042590 PM |
20883 | xsnprintf (fake_name, sizeof (fake_name), |
20884 | "<bad macro file number %d>", file); | |
2e276125 | 20885 | |
6e70227d | 20886 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
20887 | _("bad file number in macro information (%d)"), |
20888 | file); | |
2e276125 | 20889 | |
6a83a1e6 | 20890 | return xstrdup (fake_name); |
2e276125 JB |
20891 | } |
20892 | } | |
20893 | ||
233d95b5 JK |
20894 | /* Return the full name of file number I in *LH's file name table. |
20895 | Use COMP_DIR as the name of the current directory of the | |
20896 | compilation. The result is allocated using xmalloc; the caller is | |
20897 | responsible for freeing it. */ | |
20898 | static char * | |
20899 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
20900 | { | |
20901 | /* Is the file number a valid index into the line header's file name | |
20902 | table? Remember that file numbers start with one, not zero. */ | |
20903 | if (1 <= file && file <= lh->num_file_names) | |
20904 | { | |
20905 | char *relative = file_file_name (file, lh); | |
20906 | ||
20907 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
20908 | return relative; | |
20909 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
20910 | } | |
20911 | else | |
20912 | return file_file_name (file, lh); | |
20913 | } | |
20914 | ||
2e276125 JB |
20915 | |
20916 | static struct macro_source_file * | |
20917 | macro_start_file (int file, int line, | |
20918 | struct macro_source_file *current_file, | |
43f3e411 | 20919 | struct line_header *lh) |
2e276125 | 20920 | { |
233d95b5 JK |
20921 | /* File name relative to the compilation directory of this source file. */ |
20922 | char *file_name = file_file_name (file, lh); | |
2e276125 | 20923 | |
2e276125 | 20924 | if (! current_file) |
abc9d0dc | 20925 | { |
fc474241 DE |
20926 | /* Note: We don't create a macro table for this compilation unit |
20927 | at all until we actually get a filename. */ | |
43f3e411 | 20928 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 20929 | |
abc9d0dc TT |
20930 | /* If we have no current file, then this must be the start_file |
20931 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
20932 | current_file = macro_set_main (macro_table, file_name); |
20933 | macro_define_special (macro_table); | |
abc9d0dc | 20934 | } |
2e276125 | 20935 | else |
233d95b5 | 20936 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 20937 | |
233d95b5 | 20938 | xfree (file_name); |
6e70227d | 20939 | |
2e276125 JB |
20940 | return current_file; |
20941 | } | |
20942 | ||
20943 | ||
20944 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
20945 | followed by a null byte. */ | |
20946 | static char * | |
20947 | copy_string (const char *buf, int len) | |
20948 | { | |
224c3ddb | 20949 | char *s = (char *) xmalloc (len + 1); |
9a619af0 | 20950 | |
2e276125 JB |
20951 | memcpy (s, buf, len); |
20952 | s[len] = '\0'; | |
2e276125 JB |
20953 | return s; |
20954 | } | |
20955 | ||
20956 | ||
20957 | static const char * | |
20958 | consume_improper_spaces (const char *p, const char *body) | |
20959 | { | |
20960 | if (*p == ' ') | |
20961 | { | |
4d3c2250 | 20962 | complaint (&symfile_complaints, |
3e43a32a MS |
20963 | _("macro definition contains spaces " |
20964 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 20965 | body); |
2e276125 JB |
20966 | |
20967 | while (*p == ' ') | |
20968 | p++; | |
20969 | } | |
20970 | ||
20971 | return p; | |
20972 | } | |
20973 | ||
20974 | ||
20975 | static void | |
20976 | parse_macro_definition (struct macro_source_file *file, int line, | |
20977 | const char *body) | |
20978 | { | |
20979 | const char *p; | |
20980 | ||
20981 | /* The body string takes one of two forms. For object-like macro | |
20982 | definitions, it should be: | |
20983 | ||
20984 | <macro name> " " <definition> | |
20985 | ||
20986 | For function-like macro definitions, it should be: | |
20987 | ||
20988 | <macro name> "() " <definition> | |
20989 | or | |
20990 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
20991 | ||
20992 | Spaces may appear only where explicitly indicated, and in the | |
20993 | <definition>. | |
20994 | ||
20995 | The Dwarf 2 spec says that an object-like macro's name is always | |
20996 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 20997 | the space when the macro's definition is the empty string. |
2e276125 JB |
20998 | |
20999 | The Dwarf 2 spec says that there should be no spaces between the | |
21000 | formal arguments in a function-like macro's formal argument list, | |
21001 | but versions of GCC around March 2002 include spaces after the | |
21002 | commas. */ | |
21003 | ||
21004 | ||
21005 | /* Find the extent of the macro name. The macro name is terminated | |
21006 | by either a space or null character (for an object-like macro) or | |
21007 | an opening paren (for a function-like macro). */ | |
21008 | for (p = body; *p; p++) | |
21009 | if (*p == ' ' || *p == '(') | |
21010 | break; | |
21011 | ||
21012 | if (*p == ' ' || *p == '\0') | |
21013 | { | |
21014 | /* It's an object-like macro. */ | |
21015 | int name_len = p - body; | |
21016 | char *name = copy_string (body, name_len); | |
21017 | const char *replacement; | |
21018 | ||
21019 | if (*p == ' ') | |
21020 | replacement = body + name_len + 1; | |
21021 | else | |
21022 | { | |
4d3c2250 | 21023 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21024 | replacement = body + name_len; |
21025 | } | |
6e70227d | 21026 | |
2e276125 JB |
21027 | macro_define_object (file, line, name, replacement); |
21028 | ||
21029 | xfree (name); | |
21030 | } | |
21031 | else if (*p == '(') | |
21032 | { | |
21033 | /* It's a function-like macro. */ | |
21034 | char *name = copy_string (body, p - body); | |
21035 | int argc = 0; | |
21036 | int argv_size = 1; | |
8d749320 | 21037 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
21038 | |
21039 | p++; | |
21040 | ||
21041 | p = consume_improper_spaces (p, body); | |
21042 | ||
21043 | /* Parse the formal argument list. */ | |
21044 | while (*p && *p != ')') | |
21045 | { | |
21046 | /* Find the extent of the current argument name. */ | |
21047 | const char *arg_start = p; | |
21048 | ||
21049 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
21050 | p++; | |
21051 | ||
21052 | if (! *p || p == arg_start) | |
4d3c2250 | 21053 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21054 | else |
21055 | { | |
21056 | /* Make sure argv has room for the new argument. */ | |
21057 | if (argc >= argv_size) | |
21058 | { | |
21059 | argv_size *= 2; | |
224c3ddb | 21060 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
21061 | } |
21062 | ||
21063 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
21064 | } | |
21065 | ||
21066 | p = consume_improper_spaces (p, body); | |
21067 | ||
21068 | /* Consume the comma, if present. */ | |
21069 | if (*p == ',') | |
21070 | { | |
21071 | p++; | |
21072 | ||
21073 | p = consume_improper_spaces (p, body); | |
21074 | } | |
21075 | } | |
21076 | ||
21077 | if (*p == ')') | |
21078 | { | |
21079 | p++; | |
21080 | ||
21081 | if (*p == ' ') | |
21082 | /* Perfectly formed definition, no complaints. */ | |
21083 | macro_define_function (file, line, name, | |
6e70227d | 21084 | argc, (const char **) argv, |
2e276125 JB |
21085 | p + 1); |
21086 | else if (*p == '\0') | |
21087 | { | |
21088 | /* Complain, but do define it. */ | |
4d3c2250 | 21089 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 21090 | macro_define_function (file, line, name, |
6e70227d | 21091 | argc, (const char **) argv, |
2e276125 JB |
21092 | p); |
21093 | } | |
21094 | else | |
21095 | /* Just complain. */ | |
4d3c2250 | 21096 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21097 | } |
21098 | else | |
21099 | /* Just complain. */ | |
4d3c2250 | 21100 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21101 | |
21102 | xfree (name); | |
21103 | { | |
21104 | int i; | |
21105 | ||
21106 | for (i = 0; i < argc; i++) | |
21107 | xfree (argv[i]); | |
21108 | } | |
21109 | xfree (argv); | |
21110 | } | |
21111 | else | |
4d3c2250 | 21112 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21113 | } |
21114 | ||
cf2c3c16 TT |
21115 | /* Skip some bytes from BYTES according to the form given in FORM. |
21116 | Returns the new pointer. */ | |
2e276125 | 21117 | |
d521ce57 TT |
21118 | static const gdb_byte * |
21119 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
21120 | enum dwarf_form form, |
21121 | unsigned int offset_size, | |
21122 | struct dwarf2_section_info *section) | |
2e276125 | 21123 | { |
cf2c3c16 | 21124 | unsigned int bytes_read; |
2e276125 | 21125 | |
cf2c3c16 | 21126 | switch (form) |
2e276125 | 21127 | { |
cf2c3c16 TT |
21128 | case DW_FORM_data1: |
21129 | case DW_FORM_flag: | |
21130 | ++bytes; | |
21131 | break; | |
21132 | ||
21133 | case DW_FORM_data2: | |
21134 | bytes += 2; | |
21135 | break; | |
21136 | ||
21137 | case DW_FORM_data4: | |
21138 | bytes += 4; | |
21139 | break; | |
21140 | ||
21141 | case DW_FORM_data8: | |
21142 | bytes += 8; | |
21143 | break; | |
21144 | ||
21145 | case DW_FORM_string: | |
21146 | read_direct_string (abfd, bytes, &bytes_read); | |
21147 | bytes += bytes_read; | |
21148 | break; | |
21149 | ||
21150 | case DW_FORM_sec_offset: | |
21151 | case DW_FORM_strp: | |
36586728 | 21152 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
21153 | bytes += offset_size; |
21154 | break; | |
21155 | ||
21156 | case DW_FORM_block: | |
21157 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
21158 | bytes += bytes_read; | |
21159 | break; | |
21160 | ||
21161 | case DW_FORM_block1: | |
21162 | bytes += 1 + read_1_byte (abfd, bytes); | |
21163 | break; | |
21164 | case DW_FORM_block2: | |
21165 | bytes += 2 + read_2_bytes (abfd, bytes); | |
21166 | break; | |
21167 | case DW_FORM_block4: | |
21168 | bytes += 4 + read_4_bytes (abfd, bytes); | |
21169 | break; | |
21170 | ||
21171 | case DW_FORM_sdata: | |
21172 | case DW_FORM_udata: | |
3019eac3 DE |
21173 | case DW_FORM_GNU_addr_index: |
21174 | case DW_FORM_GNU_str_index: | |
d521ce57 | 21175 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
21176 | if (bytes == NULL) |
21177 | { | |
21178 | dwarf2_section_buffer_overflow_complaint (section); | |
21179 | return NULL; | |
21180 | } | |
cf2c3c16 TT |
21181 | break; |
21182 | ||
21183 | default: | |
21184 | { | |
21185 | complain: | |
21186 | complaint (&symfile_complaints, | |
21187 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 21188 | form, get_section_name (section)); |
cf2c3c16 TT |
21189 | return NULL; |
21190 | } | |
2e276125 JB |
21191 | } |
21192 | ||
cf2c3c16 TT |
21193 | return bytes; |
21194 | } | |
757a13d0 | 21195 | |
cf2c3c16 TT |
21196 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
21197 | opcode. Returns an updated pointer to the macro data buffer; or, | |
21198 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 21199 | |
d521ce57 | 21200 | static const gdb_byte * |
cf2c3c16 | 21201 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
21202 | const gdb_byte **opcode_definitions, |
21203 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
21204 | bfd *abfd, |
21205 | unsigned int offset_size, | |
21206 | struct dwarf2_section_info *section) | |
21207 | { | |
21208 | unsigned int bytes_read, i; | |
21209 | unsigned long arg; | |
d521ce57 | 21210 | const gdb_byte *defn; |
2e276125 | 21211 | |
cf2c3c16 | 21212 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 21213 | { |
cf2c3c16 TT |
21214 | complaint (&symfile_complaints, |
21215 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
21216 | opcode); | |
21217 | return NULL; | |
21218 | } | |
2e276125 | 21219 | |
cf2c3c16 TT |
21220 | defn = opcode_definitions[opcode]; |
21221 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
21222 | defn += bytes_read; | |
2e276125 | 21223 | |
cf2c3c16 TT |
21224 | for (i = 0; i < arg; ++i) |
21225 | { | |
aead7601 SM |
21226 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
21227 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 21228 | section); |
cf2c3c16 TT |
21229 | if (mac_ptr == NULL) |
21230 | { | |
21231 | /* skip_form_bytes already issued the complaint. */ | |
21232 | return NULL; | |
21233 | } | |
21234 | } | |
757a13d0 | 21235 | |
cf2c3c16 TT |
21236 | return mac_ptr; |
21237 | } | |
757a13d0 | 21238 | |
cf2c3c16 TT |
21239 | /* A helper function which parses the header of a macro section. |
21240 | If the macro section is the extended (for now called "GNU") type, | |
21241 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
21242 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 21243 | |
d521ce57 TT |
21244 | static const gdb_byte * |
21245 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 21246 | bfd *abfd, |
d521ce57 | 21247 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
21248 | unsigned int *offset_size, |
21249 | int section_is_gnu) | |
21250 | { | |
21251 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 21252 | |
cf2c3c16 TT |
21253 | if (section_is_gnu) |
21254 | { | |
21255 | unsigned int version, flags; | |
757a13d0 | 21256 | |
cf2c3c16 TT |
21257 | version = read_2_bytes (abfd, mac_ptr); |
21258 | if (version != 4) | |
21259 | { | |
21260 | complaint (&symfile_complaints, | |
21261 | _("unrecognized version `%d' in .debug_macro section"), | |
21262 | version); | |
21263 | return NULL; | |
21264 | } | |
21265 | mac_ptr += 2; | |
757a13d0 | 21266 | |
cf2c3c16 TT |
21267 | flags = read_1_byte (abfd, mac_ptr); |
21268 | ++mac_ptr; | |
21269 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 21270 | |
cf2c3c16 TT |
21271 | if ((flags & 2) != 0) |
21272 | /* We don't need the line table offset. */ | |
21273 | mac_ptr += *offset_size; | |
757a13d0 | 21274 | |
cf2c3c16 TT |
21275 | /* Vendor opcode descriptions. */ |
21276 | if ((flags & 4) != 0) | |
21277 | { | |
21278 | unsigned int i, count; | |
757a13d0 | 21279 | |
cf2c3c16 TT |
21280 | count = read_1_byte (abfd, mac_ptr); |
21281 | ++mac_ptr; | |
21282 | for (i = 0; i < count; ++i) | |
21283 | { | |
21284 | unsigned int opcode, bytes_read; | |
21285 | unsigned long arg; | |
21286 | ||
21287 | opcode = read_1_byte (abfd, mac_ptr); | |
21288 | ++mac_ptr; | |
21289 | opcode_definitions[opcode] = mac_ptr; | |
21290 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21291 | mac_ptr += bytes_read; | |
21292 | mac_ptr += arg; | |
21293 | } | |
757a13d0 | 21294 | } |
cf2c3c16 | 21295 | } |
757a13d0 | 21296 | |
cf2c3c16 TT |
21297 | return mac_ptr; |
21298 | } | |
757a13d0 | 21299 | |
cf2c3c16 | 21300 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 21301 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
21302 | |
21303 | static void | |
d521ce57 TT |
21304 | dwarf_decode_macro_bytes (bfd *abfd, |
21305 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 21306 | struct macro_source_file *current_file, |
43f3e411 | 21307 | struct line_header *lh, |
cf2c3c16 | 21308 | struct dwarf2_section_info *section, |
36586728 | 21309 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 21310 | unsigned int offset_size, |
8fc3fc34 | 21311 | htab_t include_hash) |
cf2c3c16 | 21312 | { |
4d663531 | 21313 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
21314 | enum dwarf_macro_record_type macinfo_type; |
21315 | int at_commandline; | |
d521ce57 | 21316 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 21317 | |
cf2c3c16 TT |
21318 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
21319 | &offset_size, section_is_gnu); | |
21320 | if (mac_ptr == NULL) | |
21321 | { | |
21322 | /* We already issued a complaint. */ | |
21323 | return; | |
21324 | } | |
757a13d0 JK |
21325 | |
21326 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
21327 | GDB is still reading the definitions from command line. First | |
21328 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
21329 | to create CURRENT_FILE for the main source holding also the command line | |
21330 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
21331 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
21332 | ||
21333 | at_commandline = 1; | |
21334 | ||
21335 | do | |
21336 | { | |
21337 | /* Do we at least have room for a macinfo type byte? */ | |
21338 | if (mac_ptr >= mac_end) | |
21339 | { | |
f664829e | 21340 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
21341 | break; |
21342 | } | |
21343 | ||
aead7601 | 21344 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
21345 | mac_ptr++; |
21346 | ||
cf2c3c16 TT |
21347 | /* Note that we rely on the fact that the corresponding GNU and |
21348 | DWARF constants are the same. */ | |
757a13d0 JK |
21349 | switch (macinfo_type) |
21350 | { | |
21351 | /* A zero macinfo type indicates the end of the macro | |
21352 | information. */ | |
21353 | case 0: | |
21354 | break; | |
2e276125 | 21355 | |
cf2c3c16 TT |
21356 | case DW_MACRO_GNU_define: |
21357 | case DW_MACRO_GNU_undef: | |
21358 | case DW_MACRO_GNU_define_indirect: | |
21359 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
21360 | case DW_MACRO_GNU_define_indirect_alt: |
21361 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 21362 | { |
891d2f0b | 21363 | unsigned int bytes_read; |
2e276125 | 21364 | int line; |
d521ce57 | 21365 | const char *body; |
cf2c3c16 | 21366 | int is_define; |
2e276125 | 21367 | |
cf2c3c16 TT |
21368 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
21369 | mac_ptr += bytes_read; | |
21370 | ||
21371 | if (macinfo_type == DW_MACRO_GNU_define | |
21372 | || macinfo_type == DW_MACRO_GNU_undef) | |
21373 | { | |
21374 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
21375 | mac_ptr += bytes_read; | |
21376 | } | |
21377 | else | |
21378 | { | |
21379 | LONGEST str_offset; | |
21380 | ||
21381 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
21382 | mac_ptr += offset_size; | |
2e276125 | 21383 | |
36586728 | 21384 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
21385 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
21386 | || section_is_dwz) | |
36586728 TT |
21387 | { |
21388 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
21389 | ||
21390 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
21391 | } | |
21392 | else | |
21393 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
21394 | } |
21395 | ||
21396 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
21397 | || macinfo_type == DW_MACRO_GNU_define_indirect |
21398 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 21399 | if (! current_file) |
757a13d0 JK |
21400 | { |
21401 | /* DWARF violation as no main source is present. */ | |
21402 | complaint (&symfile_complaints, | |
21403 | _("debug info with no main source gives macro %s " | |
21404 | "on line %d: %s"), | |
cf2c3c16 TT |
21405 | is_define ? _("definition") : _("undefinition"), |
21406 | line, body); | |
757a13d0 JK |
21407 | break; |
21408 | } | |
3e43a32a MS |
21409 | if ((line == 0 && !at_commandline) |
21410 | || (line != 0 && at_commandline)) | |
4d3c2250 | 21411 | complaint (&symfile_complaints, |
757a13d0 JK |
21412 | _("debug info gives %s macro %s with %s line %d: %s"), |
21413 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 21414 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
21415 | line == 0 ? _("zero") : _("non-zero"), line, body); |
21416 | ||
cf2c3c16 | 21417 | if (is_define) |
757a13d0 | 21418 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
21419 | else |
21420 | { | |
21421 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
21422 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
21423 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
21424 | macro_undef (current_file, line, body); |
21425 | } | |
2e276125 JB |
21426 | } |
21427 | break; | |
21428 | ||
cf2c3c16 | 21429 | case DW_MACRO_GNU_start_file: |
2e276125 | 21430 | { |
891d2f0b | 21431 | unsigned int bytes_read; |
2e276125 JB |
21432 | int line, file; |
21433 | ||
21434 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21435 | mac_ptr += bytes_read; | |
21436 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21437 | mac_ptr += bytes_read; | |
21438 | ||
3e43a32a MS |
21439 | if ((line == 0 && !at_commandline) |
21440 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
21441 | complaint (&symfile_complaints, |
21442 | _("debug info gives source %d included " | |
21443 | "from %s at %s line %d"), | |
21444 | file, at_commandline ? _("command-line") : _("file"), | |
21445 | line == 0 ? _("zero") : _("non-zero"), line); | |
21446 | ||
21447 | if (at_commandline) | |
21448 | { | |
cf2c3c16 TT |
21449 | /* This DW_MACRO_GNU_start_file was executed in the |
21450 | pass one. */ | |
757a13d0 JK |
21451 | at_commandline = 0; |
21452 | } | |
21453 | else | |
43f3e411 | 21454 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
21455 | } |
21456 | break; | |
21457 | ||
cf2c3c16 | 21458 | case DW_MACRO_GNU_end_file: |
2e276125 | 21459 | if (! current_file) |
4d3c2250 | 21460 | complaint (&symfile_complaints, |
3e43a32a MS |
21461 | _("macro debug info has an unmatched " |
21462 | "`close_file' directive")); | |
2e276125 JB |
21463 | else |
21464 | { | |
21465 | current_file = current_file->included_by; | |
21466 | if (! current_file) | |
21467 | { | |
cf2c3c16 | 21468 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
21469 | |
21470 | /* GCC circa March 2002 doesn't produce the zero | |
21471 | type byte marking the end of the compilation | |
21472 | unit. Complain if it's not there, but exit no | |
21473 | matter what. */ | |
21474 | ||
21475 | /* Do we at least have room for a macinfo type byte? */ | |
21476 | if (mac_ptr >= mac_end) | |
21477 | { | |
f664829e | 21478 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
21479 | return; |
21480 | } | |
21481 | ||
21482 | /* We don't increment mac_ptr here, so this is just | |
21483 | a look-ahead. */ | |
aead7601 SM |
21484 | next_type |
21485 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
21486 | mac_ptr); | |
2e276125 | 21487 | if (next_type != 0) |
4d3c2250 | 21488 | complaint (&symfile_complaints, |
3e43a32a MS |
21489 | _("no terminating 0-type entry for " |
21490 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
21491 | |
21492 | return; | |
21493 | } | |
21494 | } | |
21495 | break; | |
21496 | ||
cf2c3c16 | 21497 | case DW_MACRO_GNU_transparent_include: |
36586728 | 21498 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21499 | { |
21500 | LONGEST offset; | |
8fc3fc34 | 21501 | void **slot; |
a036ba48 TT |
21502 | bfd *include_bfd = abfd; |
21503 | struct dwarf2_section_info *include_section = section; | |
21504 | struct dwarf2_section_info alt_section; | |
d521ce57 | 21505 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 21506 | int is_dwz = section_is_dwz; |
d521ce57 | 21507 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
21508 | |
21509 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
21510 | mac_ptr += offset_size; | |
21511 | ||
a036ba48 TT |
21512 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
21513 | { | |
21514 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
21515 | ||
4d663531 | 21516 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 21517 | |
a036ba48 | 21518 | include_section = &dwz->macro; |
a32a8923 | 21519 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
21520 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
21521 | is_dwz = 1; | |
21522 | } | |
21523 | ||
21524 | new_mac_ptr = include_section->buffer + offset; | |
21525 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
21526 | ||
8fc3fc34 TT |
21527 | if (*slot != NULL) |
21528 | { | |
21529 | /* This has actually happened; see | |
21530 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
21531 | complaint (&symfile_complaints, | |
21532 | _("recursive DW_MACRO_GNU_transparent_include in " | |
21533 | ".debug_macro section")); | |
21534 | } | |
21535 | else | |
21536 | { | |
d521ce57 | 21537 | *slot = (void *) new_mac_ptr; |
36586728 | 21538 | |
a036ba48 | 21539 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 21540 | include_mac_end, current_file, lh, |
36586728 | 21541 | section, section_is_gnu, is_dwz, |
4d663531 | 21542 | offset_size, include_hash); |
8fc3fc34 | 21543 | |
d521ce57 | 21544 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 21545 | } |
cf2c3c16 TT |
21546 | } |
21547 | break; | |
21548 | ||
2e276125 | 21549 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
21550 | if (!section_is_gnu) |
21551 | { | |
21552 | unsigned int bytes_read; | |
21553 | int constant; | |
2e276125 | 21554 | |
cf2c3c16 TT |
21555 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
21556 | mac_ptr += bytes_read; | |
21557 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21558 | mac_ptr += bytes_read; | |
2e276125 | 21559 | |
cf2c3c16 TT |
21560 | /* We don't recognize any vendor extensions. */ |
21561 | break; | |
21562 | } | |
21563 | /* FALLTHROUGH */ | |
21564 | ||
21565 | default: | |
21566 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21567 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21568 | section); |
21569 | if (mac_ptr == NULL) | |
21570 | return; | |
21571 | break; | |
2e276125 | 21572 | } |
757a13d0 | 21573 | } while (macinfo_type != 0); |
2e276125 | 21574 | } |
8e19ed76 | 21575 | |
cf2c3c16 | 21576 | static void |
09262596 | 21577 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 21578 | int section_is_gnu) |
cf2c3c16 | 21579 | { |
bb5ed363 | 21580 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
21581 | struct line_header *lh = cu->line_header; |
21582 | bfd *abfd; | |
d521ce57 | 21583 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
21584 | struct macro_source_file *current_file = 0; |
21585 | enum dwarf_macro_record_type macinfo_type; | |
21586 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 21587 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
21588 | struct cleanup *cleanup; |
21589 | htab_t include_hash; | |
21590 | void **slot; | |
09262596 DE |
21591 | struct dwarf2_section_info *section; |
21592 | const char *section_name; | |
21593 | ||
21594 | if (cu->dwo_unit != NULL) | |
21595 | { | |
21596 | if (section_is_gnu) | |
21597 | { | |
21598 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
21599 | section_name = ".debug_macro.dwo"; | |
21600 | } | |
21601 | else | |
21602 | { | |
21603 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
21604 | section_name = ".debug_macinfo.dwo"; | |
21605 | } | |
21606 | } | |
21607 | else | |
21608 | { | |
21609 | if (section_is_gnu) | |
21610 | { | |
21611 | section = &dwarf2_per_objfile->macro; | |
21612 | section_name = ".debug_macro"; | |
21613 | } | |
21614 | else | |
21615 | { | |
21616 | section = &dwarf2_per_objfile->macinfo; | |
21617 | section_name = ".debug_macinfo"; | |
21618 | } | |
21619 | } | |
cf2c3c16 | 21620 | |
bb5ed363 | 21621 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
21622 | if (section->buffer == NULL) |
21623 | { | |
fceca515 | 21624 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
21625 | return; |
21626 | } | |
a32a8923 | 21627 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
21628 | |
21629 | /* First pass: Find the name of the base filename. | |
21630 | This filename is needed in order to process all macros whose definition | |
21631 | (or undefinition) comes from the command line. These macros are defined | |
21632 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
21633 | associated to the base file. | |
21634 | ||
21635 | To determine the base file name, we scan the macro definitions until we | |
21636 | reach the first DW_MACINFO_start_file entry. We then initialize | |
21637 | CURRENT_FILE accordingly so that any macro definition found before the | |
21638 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
21639 | ||
21640 | mac_ptr = section->buffer + offset; | |
21641 | mac_end = section->buffer + section->size; | |
21642 | ||
21643 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
21644 | &offset_size, section_is_gnu); | |
21645 | if (mac_ptr == NULL) | |
21646 | { | |
21647 | /* We already issued a complaint. */ | |
21648 | return; | |
21649 | } | |
21650 | ||
21651 | do | |
21652 | { | |
21653 | /* Do we at least have room for a macinfo type byte? */ | |
21654 | if (mac_ptr >= mac_end) | |
21655 | { | |
21656 | /* Complaint is printed during the second pass as GDB will probably | |
21657 | stop the first pass earlier upon finding | |
21658 | DW_MACINFO_start_file. */ | |
21659 | break; | |
21660 | } | |
21661 | ||
aead7601 | 21662 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
21663 | mac_ptr++; |
21664 | ||
21665 | /* Note that we rely on the fact that the corresponding GNU and | |
21666 | DWARF constants are the same. */ | |
21667 | switch (macinfo_type) | |
21668 | { | |
21669 | /* A zero macinfo type indicates the end of the macro | |
21670 | information. */ | |
21671 | case 0: | |
21672 | break; | |
21673 | ||
21674 | case DW_MACRO_GNU_define: | |
21675 | case DW_MACRO_GNU_undef: | |
21676 | /* Only skip the data by MAC_PTR. */ | |
21677 | { | |
21678 | unsigned int bytes_read; | |
21679 | ||
21680 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21681 | mac_ptr += bytes_read; | |
21682 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21683 | mac_ptr += bytes_read; | |
21684 | } | |
21685 | break; | |
21686 | ||
21687 | case DW_MACRO_GNU_start_file: | |
21688 | { | |
21689 | unsigned int bytes_read; | |
21690 | int line, file; | |
21691 | ||
21692 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21693 | mac_ptr += bytes_read; | |
21694 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21695 | mac_ptr += bytes_read; | |
21696 | ||
43f3e411 | 21697 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
21698 | } |
21699 | break; | |
21700 | ||
21701 | case DW_MACRO_GNU_end_file: | |
21702 | /* No data to skip by MAC_PTR. */ | |
21703 | break; | |
21704 | ||
21705 | case DW_MACRO_GNU_define_indirect: | |
21706 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
21707 | case DW_MACRO_GNU_define_indirect_alt: |
21708 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
21709 | { |
21710 | unsigned int bytes_read; | |
21711 | ||
21712 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21713 | mac_ptr += bytes_read; | |
21714 | mac_ptr += offset_size; | |
21715 | } | |
21716 | break; | |
21717 | ||
21718 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 21719 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21720 | /* Note that, according to the spec, a transparent include |
21721 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
21722 | skip this opcode. */ | |
21723 | mac_ptr += offset_size; | |
21724 | break; | |
21725 | ||
21726 | case DW_MACINFO_vendor_ext: | |
21727 | /* Only skip the data by MAC_PTR. */ | |
21728 | if (!section_is_gnu) | |
21729 | { | |
21730 | unsigned int bytes_read; | |
21731 | ||
21732 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21733 | mac_ptr += bytes_read; | |
21734 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21735 | mac_ptr += bytes_read; | |
21736 | } | |
21737 | /* FALLTHROUGH */ | |
21738 | ||
21739 | default: | |
21740 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21741 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21742 | section); |
21743 | if (mac_ptr == NULL) | |
21744 | return; | |
21745 | break; | |
21746 | } | |
21747 | } while (macinfo_type != 0 && current_file == NULL); | |
21748 | ||
21749 | /* Second pass: Process all entries. | |
21750 | ||
21751 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
21752 | command-line macro definitions/undefinitions. This flag is unset when we | |
21753 | reach the first DW_MACINFO_start_file entry. */ | |
21754 | ||
8fc3fc34 TT |
21755 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
21756 | NULL, xcalloc, xfree); | |
21757 | cleanup = make_cleanup_htab_delete (include_hash); | |
21758 | mac_ptr = section->buffer + offset; | |
21759 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 21760 | *slot = (void *) mac_ptr; |
8fc3fc34 | 21761 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 21762 | current_file, lh, section, |
4d663531 | 21763 | section_is_gnu, 0, offset_size, include_hash); |
8fc3fc34 | 21764 | do_cleanups (cleanup); |
cf2c3c16 TT |
21765 | } |
21766 | ||
8e19ed76 | 21767 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 21768 | if so return true else false. */ |
380bca97 | 21769 | |
8e19ed76 | 21770 | static int |
6e5a29e1 | 21771 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
21772 | { |
21773 | return (attr == NULL ? 0 : | |
21774 | attr->form == DW_FORM_block1 | |
21775 | || attr->form == DW_FORM_block2 | |
21776 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
21777 | || attr->form == DW_FORM_block |
21778 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 21779 | } |
4c2df51b | 21780 | |
c6a0999f JB |
21781 | /* Return non-zero if ATTR's value is a section offset --- classes |
21782 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
21783 | You may use DW_UNSND (attr) to retrieve such offsets. | |
21784 | ||
21785 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
21786 | may have a value that belongs to more than one of these classes; it | |
21787 | would be ambiguous if we did, because we use the same forms for all | |
21788 | of them. */ | |
380bca97 | 21789 | |
3690dd37 | 21790 | static int |
6e5a29e1 | 21791 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
21792 | { |
21793 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
21794 | || attr->form == DW_FORM_data8 |
21795 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
21796 | } |
21797 | ||
3690dd37 JB |
21798 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
21799 | zero otherwise. When this function returns true, you can apply | |
21800 | dwarf2_get_attr_constant_value to it. | |
21801 | ||
21802 | However, note that for some attributes you must check | |
21803 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
21804 | and DW_FORM_data8 are members of both the constant class, and of | |
21805 | the classes that contain offsets into other debug sections | |
21806 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
21807 | that, if an attribute's can be either a constant or one of the | |
21808 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
21809 | taken as section offsets, not constants. */ | |
380bca97 | 21810 | |
3690dd37 | 21811 | static int |
6e5a29e1 | 21812 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
21813 | { |
21814 | switch (attr->form) | |
21815 | { | |
21816 | case DW_FORM_sdata: | |
21817 | case DW_FORM_udata: | |
21818 | case DW_FORM_data1: | |
21819 | case DW_FORM_data2: | |
21820 | case DW_FORM_data4: | |
21821 | case DW_FORM_data8: | |
21822 | return 1; | |
21823 | default: | |
21824 | return 0; | |
21825 | } | |
21826 | } | |
21827 | ||
7771576e SA |
21828 | |
21829 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
21830 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
21831 | ||
21832 | static int | |
6e5a29e1 | 21833 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
21834 | { |
21835 | switch (attr->form) | |
21836 | { | |
21837 | case DW_FORM_ref_addr: | |
21838 | case DW_FORM_ref1: | |
21839 | case DW_FORM_ref2: | |
21840 | case DW_FORM_ref4: | |
21841 | case DW_FORM_ref8: | |
21842 | case DW_FORM_ref_udata: | |
21843 | case DW_FORM_GNU_ref_alt: | |
21844 | return 1; | |
21845 | default: | |
21846 | return 0; | |
21847 | } | |
21848 | } | |
21849 | ||
3019eac3 DE |
21850 | /* Return the .debug_loc section to use for CU. |
21851 | For DWO files use .debug_loc.dwo. */ | |
21852 | ||
21853 | static struct dwarf2_section_info * | |
21854 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
21855 | { | |
21856 | if (cu->dwo_unit) | |
21857 | return &cu->dwo_unit->dwo_file->sections.loc; | |
21858 | return &dwarf2_per_objfile->loc; | |
21859 | } | |
21860 | ||
8cf6f0b1 TT |
21861 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
21862 | ||
21863 | static void | |
21864 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
21865 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 21866 | const struct attribute *attr) |
8cf6f0b1 | 21867 | { |
3019eac3 DE |
21868 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
21869 | ||
21870 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
21871 | |
21872 | baton->per_cu = cu->per_cu; | |
21873 | gdb_assert (baton->per_cu); | |
21874 | /* We don't know how long the location list is, but make sure we | |
21875 | don't run off the edge of the section. */ | |
3019eac3 DE |
21876 | baton->size = section->size - DW_UNSND (attr); |
21877 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 21878 | baton->base_address = cu->base_address; |
f664829e | 21879 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
21880 | } |
21881 | ||
4c2df51b | 21882 | static void |
ff39bb5e | 21883 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 21884 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 21885 | { |
bb5ed363 | 21886 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 21887 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 21888 | |
3690dd37 | 21889 | if (attr_form_is_section_offset (attr) |
3019eac3 | 21890 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
21891 | the section. If so, fall through to the complaint in the |
21892 | other branch. */ | |
3019eac3 | 21893 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 21894 | { |
0d53c4c4 | 21895 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 21896 | |
8d749320 | 21897 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 21898 | |
8cf6f0b1 | 21899 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 21900 | |
d00adf39 | 21901 | if (cu->base_known == 0) |
0d53c4c4 | 21902 | complaint (&symfile_complaints, |
3e43a32a MS |
21903 | _("Location list used without " |
21904 | "specifying the CU base address.")); | |
4c2df51b | 21905 | |
f1e6e072 TT |
21906 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21907 | ? dwarf2_loclist_block_index | |
21908 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
21909 | SYMBOL_LOCATION_BATON (sym) = baton; |
21910 | } | |
21911 | else | |
21912 | { | |
21913 | struct dwarf2_locexpr_baton *baton; | |
21914 | ||
8d749320 | 21915 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
21916 | baton->per_cu = cu->per_cu; |
21917 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
21918 | |
21919 | if (attr_form_is_block (attr)) | |
21920 | { | |
21921 | /* Note that we're just copying the block's data pointer | |
21922 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
21923 | info_buffer for SYM's objfile; right now we never release |
21924 | that buffer, but when we do clean up properly this may | |
21925 | need to change. */ | |
0d53c4c4 DJ |
21926 | baton->size = DW_BLOCK (attr)->size; |
21927 | baton->data = DW_BLOCK (attr)->data; | |
21928 | } | |
21929 | else | |
21930 | { | |
21931 | dwarf2_invalid_attrib_class_complaint ("location description", | |
21932 | SYMBOL_NATURAL_NAME (sym)); | |
21933 | baton->size = 0; | |
0d53c4c4 | 21934 | } |
6e70227d | 21935 | |
f1e6e072 TT |
21936 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21937 | ? dwarf2_locexpr_block_index | |
21938 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
21939 | SYMBOL_LOCATION_BATON (sym) = baton; |
21940 | } | |
4c2df51b | 21941 | } |
6502dd73 | 21942 | |
9aa1f1e3 TT |
21943 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
21944 | came from a separate debuginfo file, then the master objfile is | |
21945 | returned. */ | |
ae0d2f24 UW |
21946 | |
21947 | struct objfile * | |
21948 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
21949 | { | |
9291a0cd | 21950 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
21951 | |
21952 | /* Return the master objfile, so that we can report and look up the | |
21953 | correct file containing this variable. */ | |
21954 | if (objfile->separate_debug_objfile_backlink) | |
21955 | objfile = objfile->separate_debug_objfile_backlink; | |
21956 | ||
21957 | return objfile; | |
21958 | } | |
21959 | ||
96408a79 SA |
21960 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
21961 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
21962 | CU_HEADERP first. */ | |
21963 | ||
21964 | static const struct comp_unit_head * | |
21965 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
21966 | struct dwarf2_per_cu_data *per_cu) | |
21967 | { | |
d521ce57 | 21968 | const gdb_byte *info_ptr; |
96408a79 SA |
21969 | |
21970 | if (per_cu->cu) | |
21971 | return &per_cu->cu->header; | |
21972 | ||
8a0459fd | 21973 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
21974 | |
21975 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 21976 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
21977 | |
21978 | return cu_headerp; | |
21979 | } | |
21980 | ||
ae0d2f24 UW |
21981 | /* Return the address size given in the compilation unit header for CU. */ |
21982 | ||
98714339 | 21983 | int |
ae0d2f24 UW |
21984 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
21985 | { | |
96408a79 SA |
21986 | struct comp_unit_head cu_header_local; |
21987 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 21988 | |
96408a79 SA |
21989 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21990 | ||
21991 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
21992 | } |
21993 | ||
9eae7c52 TT |
21994 | /* Return the offset size given in the compilation unit header for CU. */ |
21995 | ||
21996 | int | |
21997 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
21998 | { | |
96408a79 SA |
21999 | struct comp_unit_head cu_header_local; |
22000 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 22001 | |
96408a79 SA |
22002 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22003 | ||
22004 | return cu_headerp->offset_size; | |
22005 | } | |
22006 | ||
22007 | /* See its dwarf2loc.h declaration. */ | |
22008 | ||
22009 | int | |
22010 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
22011 | { | |
22012 | struct comp_unit_head cu_header_local; | |
22013 | const struct comp_unit_head *cu_headerp; | |
22014 | ||
22015 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
22016 | ||
22017 | if (cu_headerp->version == 2) | |
22018 | return cu_headerp->addr_size; | |
22019 | else | |
22020 | return cu_headerp->offset_size; | |
181cebd4 JK |
22021 | } |
22022 | ||
9aa1f1e3 TT |
22023 | /* Return the text offset of the CU. The returned offset comes from |
22024 | this CU's objfile. If this objfile came from a separate debuginfo | |
22025 | file, then the offset may be different from the corresponding | |
22026 | offset in the parent objfile. */ | |
22027 | ||
22028 | CORE_ADDR | |
22029 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
22030 | { | |
bb3fa9d0 | 22031 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
22032 | |
22033 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22034 | } | |
22035 | ||
348e048f DE |
22036 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
22037 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
22038 | |
22039 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 22040 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 22041 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
22042 | struct objfile *objfile) |
22043 | { | |
22044 | struct dwarf2_per_cu_data *this_cu; | |
22045 | int low, high; | |
36586728 | 22046 | const sect_offset *cu_off; |
ae038cb0 | 22047 | |
ae038cb0 DJ |
22048 | low = 0; |
22049 | high = dwarf2_per_objfile->n_comp_units - 1; | |
22050 | while (high > low) | |
22051 | { | |
36586728 | 22052 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 22053 | int mid = low + (high - low) / 2; |
9a619af0 | 22054 | |
36586728 TT |
22055 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
22056 | cu_off = &mid_cu->offset; | |
22057 | if (mid_cu->is_dwz > offset_in_dwz | |
22058 | || (mid_cu->is_dwz == offset_in_dwz | |
22059 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
22060 | high = mid; |
22061 | else | |
22062 | low = mid + 1; | |
22063 | } | |
22064 | gdb_assert (low == high); | |
36586728 TT |
22065 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
22066 | cu_off = &this_cu->offset; | |
22067 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 22068 | { |
36586728 | 22069 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
22070 | error (_("Dwarf Error: could not find partial DIE containing " |
22071 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 22072 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 22073 | |
b64f50a1 JK |
22074 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
22075 | <= offset.sect_off); | |
ae038cb0 DJ |
22076 | return dwarf2_per_objfile->all_comp_units[low-1]; |
22077 | } | |
22078 | else | |
22079 | { | |
22080 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
22081 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
22082 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
22083 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
22084 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
22085 | return this_cu; |
22086 | } | |
22087 | } | |
22088 | ||
23745b47 | 22089 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 22090 | |
9816fde3 | 22091 | static void |
23745b47 | 22092 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 22093 | { |
9816fde3 | 22094 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
22095 | per_cu->cu = cu; |
22096 | cu->per_cu = per_cu; | |
22097 | cu->objfile = per_cu->objfile; | |
93311388 | 22098 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
22099 | } |
22100 | ||
22101 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
22102 | ||
22103 | static void | |
95554aad TT |
22104 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
22105 | enum language pretend_language) | |
9816fde3 JK |
22106 | { |
22107 | struct attribute *attr; | |
22108 | ||
22109 | /* Set the language we're debugging. */ | |
22110 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
22111 | if (attr) | |
22112 | set_cu_language (DW_UNSND (attr), cu); | |
22113 | else | |
9cded63f | 22114 | { |
95554aad | 22115 | cu->language = pretend_language; |
9cded63f TT |
22116 | cu->language_defn = language_def (cu->language); |
22117 | } | |
dee91e82 | 22118 | |
7d45c7c3 | 22119 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
22120 | } |
22121 | ||
ae038cb0 DJ |
22122 | /* Release one cached compilation unit, CU. We unlink it from the tree |
22123 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
22124 | the caller is responsible for that. |
22125 | NOTE: DATA is a void * because this function is also used as a | |
22126 | cleanup routine. */ | |
ae038cb0 DJ |
22127 | |
22128 | static void | |
68dc6402 | 22129 | free_heap_comp_unit (void *data) |
ae038cb0 | 22130 | { |
9a3c8263 | 22131 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 22132 | |
23745b47 DE |
22133 | gdb_assert (cu->per_cu != NULL); |
22134 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
22135 | cu->per_cu = NULL; |
22136 | ||
22137 | obstack_free (&cu->comp_unit_obstack, NULL); | |
22138 | ||
22139 | xfree (cu); | |
22140 | } | |
22141 | ||
72bf9492 | 22142 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 22143 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 22144 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
22145 | |
22146 | static void | |
22147 | free_stack_comp_unit (void *data) | |
22148 | { | |
9a3c8263 | 22149 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 22150 | |
23745b47 DE |
22151 | gdb_assert (cu->per_cu != NULL); |
22152 | cu->per_cu->cu = NULL; | |
22153 | cu->per_cu = NULL; | |
22154 | ||
72bf9492 DJ |
22155 | obstack_free (&cu->comp_unit_obstack, NULL); |
22156 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
22157 | } |
22158 | ||
22159 | /* Free all cached compilation units. */ | |
22160 | ||
22161 | static void | |
22162 | free_cached_comp_units (void *data) | |
22163 | { | |
22164 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22165 | ||
22166 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22167 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22168 | while (per_cu != NULL) | |
22169 | { | |
22170 | struct dwarf2_per_cu_data *next_cu; | |
22171 | ||
22172 | next_cu = per_cu->cu->read_in_chain; | |
22173 | ||
68dc6402 | 22174 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22175 | *last_chain = next_cu; |
22176 | ||
22177 | per_cu = next_cu; | |
22178 | } | |
22179 | } | |
22180 | ||
22181 | /* Increase the age counter on each cached compilation unit, and free | |
22182 | any that are too old. */ | |
22183 | ||
22184 | static void | |
22185 | age_cached_comp_units (void) | |
22186 | { | |
22187 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22188 | ||
22189 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
22190 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22191 | while (per_cu != NULL) | |
22192 | { | |
22193 | per_cu->cu->last_used ++; | |
b4f54984 | 22194 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
22195 | dwarf2_mark (per_cu->cu); |
22196 | per_cu = per_cu->cu->read_in_chain; | |
22197 | } | |
22198 | ||
22199 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22200 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22201 | while (per_cu != NULL) | |
22202 | { | |
22203 | struct dwarf2_per_cu_data *next_cu; | |
22204 | ||
22205 | next_cu = per_cu->cu->read_in_chain; | |
22206 | ||
22207 | if (!per_cu->cu->mark) | |
22208 | { | |
68dc6402 | 22209 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22210 | *last_chain = next_cu; |
22211 | } | |
22212 | else | |
22213 | last_chain = &per_cu->cu->read_in_chain; | |
22214 | ||
22215 | per_cu = next_cu; | |
22216 | } | |
22217 | } | |
22218 | ||
22219 | /* Remove a single compilation unit from the cache. */ | |
22220 | ||
22221 | static void | |
dee91e82 | 22222 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
22223 | { |
22224 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22225 | ||
22226 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22227 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22228 | while (per_cu != NULL) | |
22229 | { | |
22230 | struct dwarf2_per_cu_data *next_cu; | |
22231 | ||
22232 | next_cu = per_cu->cu->read_in_chain; | |
22233 | ||
dee91e82 | 22234 | if (per_cu == target_per_cu) |
ae038cb0 | 22235 | { |
68dc6402 | 22236 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 22237 | per_cu->cu = NULL; |
ae038cb0 DJ |
22238 | *last_chain = next_cu; |
22239 | break; | |
22240 | } | |
22241 | else | |
22242 | last_chain = &per_cu->cu->read_in_chain; | |
22243 | ||
22244 | per_cu = next_cu; | |
22245 | } | |
22246 | } | |
22247 | ||
fe3e1990 DJ |
22248 | /* Release all extra memory associated with OBJFILE. */ |
22249 | ||
22250 | void | |
22251 | dwarf2_free_objfile (struct objfile *objfile) | |
22252 | { | |
9a3c8263 SM |
22253 | dwarf2_per_objfile |
22254 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
22255 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
22256 | |
22257 | if (dwarf2_per_objfile == NULL) | |
22258 | return; | |
22259 | ||
22260 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
22261 | free_cached_comp_units (NULL); | |
22262 | ||
7b9f3c50 DE |
22263 | if (dwarf2_per_objfile->quick_file_names_table) |
22264 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 22265 | |
527f3840 JK |
22266 | if (dwarf2_per_objfile->line_header_hash) |
22267 | htab_delete (dwarf2_per_objfile->line_header_hash); | |
22268 | ||
fe3e1990 DJ |
22269 | /* Everything else should be on the objfile obstack. */ |
22270 | } | |
22271 | ||
dee91e82 DE |
22272 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
22273 | We store these in a hash table separate from the DIEs, and preserve them | |
22274 | when the DIEs are flushed out of cache. | |
22275 | ||
22276 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 22277 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
22278 | or the type may come from a DWO file. Furthermore, while it's more logical |
22279 | to use per_cu->section+offset, with Fission the section with the data is in | |
22280 | the DWO file but we don't know that section at the point we need it. | |
22281 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
22282 | because we can enter the lookup routine, get_die_type_at_offset, from | |
22283 | outside this file, and thus won't necessarily have PER_CU->cu. | |
22284 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 22285 | |
dee91e82 | 22286 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 22287 | { |
dee91e82 | 22288 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 22289 | sect_offset offset; |
1c379e20 DJ |
22290 | struct type *type; |
22291 | }; | |
22292 | ||
dee91e82 | 22293 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22294 | |
22295 | static hashval_t | |
dee91e82 | 22296 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 22297 | { |
9a3c8263 SM |
22298 | const struct dwarf2_per_cu_offset_and_type *ofs |
22299 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 22300 | |
dee91e82 | 22301 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
22302 | } |
22303 | ||
dee91e82 | 22304 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22305 | |
22306 | static int | |
dee91e82 | 22307 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 22308 | { |
9a3c8263 SM |
22309 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
22310 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
22311 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
22312 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 22313 | |
dee91e82 DE |
22314 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
22315 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
22316 | } |
22317 | ||
22318 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
22319 | table if necessary. For convenience, return TYPE. |
22320 | ||
22321 | The DIEs reading must have careful ordering to: | |
22322 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
22323 | reading current DIE. | |
22324 | * Not trying to dereference contents of still incompletely read in types | |
22325 | while reading in other DIEs. | |
22326 | * Enable referencing still incompletely read in types just by a pointer to | |
22327 | the type without accessing its fields. | |
22328 | ||
22329 | Therefore caller should follow these rules: | |
22330 | * Try to fetch any prerequisite types we may need to build this DIE type | |
22331 | before building the type and calling set_die_type. | |
e71ec853 | 22332 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
22333 | possible before fetching more types to complete the current type. |
22334 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 22335 | |
f792889a | 22336 | static struct type * |
1c379e20 DJ |
22337 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
22338 | { | |
dee91e82 | 22339 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 22340 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
22341 | struct attribute *attr; |
22342 | struct dynamic_prop prop; | |
1c379e20 | 22343 | |
b4ba55a1 JB |
22344 | /* For Ada types, make sure that the gnat-specific data is always |
22345 | initialized (if not already set). There are a few types where | |
22346 | we should not be doing so, because the type-specific area is | |
22347 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
22348 | where the type-specific area is used to store the floatformat). | |
22349 | But this is not a problem, because the gnat-specific information | |
22350 | is actually not needed for these types. */ | |
22351 | if (need_gnat_info (cu) | |
22352 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
22353 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
22354 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
22355 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
22356 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
22357 | && !HAVE_GNAT_AUX_INFO (type)) |
22358 | INIT_GNAT_SPECIFIC (type); | |
22359 | ||
3f2f83dd KB |
22360 | /* Read DW_AT_allocated and set in type. */ |
22361 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
22362 | if (attr_form_is_block (attr)) | |
22363 | { | |
22364 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
22365 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
22366 | } | |
22367 | else if (attr != NULL) | |
22368 | { | |
22369 | complaint (&symfile_complaints, | |
22370 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), | |
22371 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
22372 | die->offset.sect_off); | |
22373 | } | |
22374 | ||
22375 | /* Read DW_AT_associated and set in type. */ | |
22376 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
22377 | if (attr_form_is_block (attr)) | |
22378 | { | |
22379 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
22380 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
22381 | } | |
22382 | else if (attr != NULL) | |
22383 | { | |
22384 | complaint (&symfile_complaints, | |
22385 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), | |
22386 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
22387 | die->offset.sect_off); | |
22388 | } | |
22389 | ||
3cdcd0ce JB |
22390 | /* Read DW_AT_data_location and set in type. */ |
22391 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
22392 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 22393 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 22394 | |
dee91e82 | 22395 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 22396 | { |
dee91e82 DE |
22397 | dwarf2_per_objfile->die_type_hash = |
22398 | htab_create_alloc_ex (127, | |
22399 | per_cu_offset_and_type_hash, | |
22400 | per_cu_offset_and_type_eq, | |
22401 | NULL, | |
22402 | &objfile->objfile_obstack, | |
22403 | hashtab_obstack_allocate, | |
22404 | dummy_obstack_deallocate); | |
f792889a | 22405 | } |
1c379e20 | 22406 | |
dee91e82 | 22407 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
22408 | ofs.offset = die->offset; |
22409 | ofs.type = type; | |
dee91e82 DE |
22410 | slot = (struct dwarf2_per_cu_offset_and_type **) |
22411 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
22412 | if (*slot) |
22413 | complaint (&symfile_complaints, | |
22414 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 22415 | die->offset.sect_off); |
8d749320 SM |
22416 | *slot = XOBNEW (&objfile->objfile_obstack, |
22417 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 22418 | **slot = ofs; |
f792889a | 22419 | return type; |
1c379e20 DJ |
22420 | } |
22421 | ||
02142a6c DE |
22422 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
22423 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
22424 | |
22425 | static struct type * | |
b64f50a1 | 22426 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 22427 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 22428 | { |
dee91e82 | 22429 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 22430 | |
dee91e82 | 22431 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 22432 | return NULL; |
1c379e20 | 22433 | |
dee91e82 | 22434 | ofs.per_cu = per_cu; |
673bfd45 | 22435 | ofs.offset = offset; |
9a3c8263 SM |
22436 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
22437 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
22438 | if (slot) |
22439 | return slot->type; | |
22440 | else | |
22441 | return NULL; | |
22442 | } | |
22443 | ||
02142a6c | 22444 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
22445 | or return NULL if DIE does not have a saved type. */ |
22446 | ||
22447 | static struct type * | |
22448 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
22449 | { | |
22450 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
22451 | } | |
22452 | ||
10b3939b DJ |
22453 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
22454 | ||
22455 | static void | |
22456 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
22457 | struct dwarf2_per_cu_data *ref_per_cu) | |
22458 | { | |
22459 | void **slot; | |
22460 | ||
22461 | if (cu->dependencies == NULL) | |
22462 | cu->dependencies | |
22463 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
22464 | NULL, &cu->comp_unit_obstack, | |
22465 | hashtab_obstack_allocate, | |
22466 | dummy_obstack_deallocate); | |
22467 | ||
22468 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
22469 | if (*slot == NULL) | |
22470 | *slot = ref_per_cu; | |
22471 | } | |
1c379e20 | 22472 | |
f504f079 DE |
22473 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
22474 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
22475 | cache that we must keep because we are keeping CU. */ |
22476 | ||
10b3939b DJ |
22477 | static int |
22478 | dwarf2_mark_helper (void **slot, void *data) | |
22479 | { | |
22480 | struct dwarf2_per_cu_data *per_cu; | |
22481 | ||
22482 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
22483 | |
22484 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
22485 | reading of the chain. As such dependencies remain valid it is not much | |
22486 | useful to track and undo them during QUIT cleanups. */ | |
22487 | if (per_cu->cu == NULL) | |
22488 | return 1; | |
22489 | ||
10b3939b DJ |
22490 | if (per_cu->cu->mark) |
22491 | return 1; | |
22492 | per_cu->cu->mark = 1; | |
22493 | ||
22494 | if (per_cu->cu->dependencies != NULL) | |
22495 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
22496 | ||
22497 | return 1; | |
22498 | } | |
22499 | ||
f504f079 DE |
22500 | /* Set the mark field in CU and in every other compilation unit in the |
22501 | cache that we must keep because we are keeping CU. */ | |
22502 | ||
ae038cb0 DJ |
22503 | static void |
22504 | dwarf2_mark (struct dwarf2_cu *cu) | |
22505 | { | |
22506 | if (cu->mark) | |
22507 | return; | |
22508 | cu->mark = 1; | |
10b3939b DJ |
22509 | if (cu->dependencies != NULL) |
22510 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
22511 | } |
22512 | ||
22513 | static void | |
22514 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
22515 | { | |
22516 | while (per_cu) | |
22517 | { | |
22518 | per_cu->cu->mark = 0; | |
22519 | per_cu = per_cu->cu->read_in_chain; | |
22520 | } | |
72bf9492 DJ |
22521 | } |
22522 | ||
72bf9492 DJ |
22523 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
22524 | is its offset in .debug_info for this objfile. */ | |
22525 | ||
22526 | static hashval_t | |
22527 | partial_die_hash (const void *item) | |
22528 | { | |
9a3c8263 SM |
22529 | const struct partial_die_info *part_die |
22530 | = (const struct partial_die_info *) item; | |
9a619af0 | 22531 | |
b64f50a1 | 22532 | return part_die->offset.sect_off; |
72bf9492 DJ |
22533 | } |
22534 | ||
22535 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
22536 | are equal if they have the same offset. */ | |
22537 | ||
22538 | static int | |
22539 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
22540 | { | |
9a3c8263 SM |
22541 | const struct partial_die_info *part_die_lhs |
22542 | = (const struct partial_die_info *) item_lhs; | |
22543 | const struct partial_die_info *part_die_rhs | |
22544 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 22545 | |
b64f50a1 | 22546 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
22547 | } |
22548 | ||
b4f54984 DE |
22549 | static struct cmd_list_element *set_dwarf_cmdlist; |
22550 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
22551 | |
22552 | static void | |
b4f54984 | 22553 | set_dwarf_cmd (char *args, int from_tty) |
ae038cb0 | 22554 | { |
b4f54984 | 22555 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 22556 | gdb_stdout); |
ae038cb0 DJ |
22557 | } |
22558 | ||
22559 | static void | |
b4f54984 | 22560 | show_dwarf_cmd (char *args, int from_tty) |
6e70227d | 22561 | { |
b4f54984 | 22562 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
22563 | } |
22564 | ||
4bf44c1c | 22565 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
22566 | |
22567 | static void | |
c1bd65d0 | 22568 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 22569 | { |
9a3c8263 | 22570 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 22571 | int ix; |
8b70b953 | 22572 | |
626f2d1c TT |
22573 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
22574 | cleaning up. */ | |
22575 | dwarf2_per_objfile = NULL; | |
22576 | ||
59b0c7c1 JB |
22577 | for (ix = 0; ix < data->n_comp_units; ++ix) |
22578 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 22579 | |
59b0c7c1 | 22580 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 22581 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
22582 | data->all_type_units[ix]->per_cu.imported_symtabs); |
22583 | xfree (data->all_type_units); | |
95554aad | 22584 | |
8b70b953 | 22585 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
22586 | |
22587 | if (data->dwo_files) | |
22588 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
22589 | if (data->dwp_file) |
22590 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
22591 | |
22592 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
22593 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
22594 | } |
22595 | ||
22596 | \f | |
ae2de4f8 | 22597 | /* The "save gdb-index" command. */ |
9291a0cd TT |
22598 | |
22599 | /* The contents of the hash table we create when building the string | |
22600 | table. */ | |
22601 | struct strtab_entry | |
22602 | { | |
22603 | offset_type offset; | |
22604 | const char *str; | |
22605 | }; | |
22606 | ||
559a7a62 JK |
22607 | /* Hash function for a strtab_entry. |
22608 | ||
22609 | Function is used only during write_hash_table so no index format backward | |
22610 | compatibility is needed. */ | |
b89be57b | 22611 | |
9291a0cd TT |
22612 | static hashval_t |
22613 | hash_strtab_entry (const void *e) | |
22614 | { | |
9a3c8263 | 22615 | const struct strtab_entry *entry = (const struct strtab_entry *) e; |
559a7a62 | 22616 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
22617 | } |
22618 | ||
22619 | /* Equality function for a strtab_entry. */ | |
b89be57b | 22620 | |
9291a0cd TT |
22621 | static int |
22622 | eq_strtab_entry (const void *a, const void *b) | |
22623 | { | |
9a3c8263 SM |
22624 | const struct strtab_entry *ea = (const struct strtab_entry *) a; |
22625 | const struct strtab_entry *eb = (const struct strtab_entry *) b; | |
9291a0cd TT |
22626 | return !strcmp (ea->str, eb->str); |
22627 | } | |
22628 | ||
22629 | /* Create a strtab_entry hash table. */ | |
b89be57b | 22630 | |
9291a0cd TT |
22631 | static htab_t |
22632 | create_strtab (void) | |
22633 | { | |
22634 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
22635 | xfree, xcalloc, xfree); | |
22636 | } | |
22637 | ||
22638 | /* Add a string to the constant pool. Return the string's offset in | |
22639 | host order. */ | |
b89be57b | 22640 | |
9291a0cd TT |
22641 | static offset_type |
22642 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
22643 | { | |
22644 | void **slot; | |
22645 | struct strtab_entry entry; | |
22646 | struct strtab_entry *result; | |
22647 | ||
22648 | entry.str = str; | |
22649 | slot = htab_find_slot (table, &entry, INSERT); | |
22650 | if (*slot) | |
9a3c8263 | 22651 | result = (struct strtab_entry *) *slot; |
9291a0cd TT |
22652 | else |
22653 | { | |
22654 | result = XNEW (struct strtab_entry); | |
22655 | result->offset = obstack_object_size (cpool); | |
22656 | result->str = str; | |
22657 | obstack_grow_str0 (cpool, str); | |
22658 | *slot = result; | |
22659 | } | |
22660 | return result->offset; | |
22661 | } | |
22662 | ||
22663 | /* An entry in the symbol table. */ | |
22664 | struct symtab_index_entry | |
22665 | { | |
22666 | /* The name of the symbol. */ | |
22667 | const char *name; | |
22668 | /* The offset of the name in the constant pool. */ | |
22669 | offset_type index_offset; | |
22670 | /* A sorted vector of the indices of all the CUs that hold an object | |
22671 | of this name. */ | |
22672 | VEC (offset_type) *cu_indices; | |
22673 | }; | |
22674 | ||
22675 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
22676 | struct mapped_symtab | |
22677 | { | |
22678 | offset_type n_elements; | |
22679 | offset_type size; | |
22680 | struct symtab_index_entry **data; | |
22681 | }; | |
22682 | ||
22683 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 22684 | |
9291a0cd TT |
22685 | static hashval_t |
22686 | hash_symtab_entry (const void *e) | |
22687 | { | |
9a3c8263 SM |
22688 | const struct symtab_index_entry *entry |
22689 | = (const struct symtab_index_entry *) e; | |
9291a0cd TT |
22690 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), |
22691 | sizeof (offset_type) * VEC_length (offset_type, | |
22692 | entry->cu_indices), | |
22693 | 0); | |
22694 | } | |
22695 | ||
22696 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 22697 | |
9291a0cd TT |
22698 | static int |
22699 | eq_symtab_entry (const void *a, const void *b) | |
22700 | { | |
9a3c8263 SM |
22701 | const struct symtab_index_entry *ea = (const struct symtab_index_entry *) a; |
22702 | const struct symtab_index_entry *eb = (const struct symtab_index_entry *) b; | |
9291a0cd TT |
22703 | int len = VEC_length (offset_type, ea->cu_indices); |
22704 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
22705 | return 0; | |
22706 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
22707 | VEC_address (offset_type, eb->cu_indices), | |
22708 | sizeof (offset_type) * len); | |
22709 | } | |
22710 | ||
22711 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 22712 | |
9291a0cd TT |
22713 | static void |
22714 | delete_symtab_entry (void *p) | |
22715 | { | |
9a3c8263 | 22716 | struct symtab_index_entry *entry = (struct symtab_index_entry *) p; |
9291a0cd TT |
22717 | VEC_free (offset_type, entry->cu_indices); |
22718 | xfree (entry); | |
22719 | } | |
22720 | ||
22721 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 22722 | |
9291a0cd | 22723 | static htab_t |
3876f04e | 22724 | create_symbol_hash_table (void) |
9291a0cd TT |
22725 | { |
22726 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
22727 | delete_symtab_entry, xcalloc, xfree); | |
22728 | } | |
22729 | ||
22730 | /* Create a new mapped symtab object. */ | |
b89be57b | 22731 | |
9291a0cd TT |
22732 | static struct mapped_symtab * |
22733 | create_mapped_symtab (void) | |
22734 | { | |
22735 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
22736 | symtab->n_elements = 0; | |
22737 | symtab->size = 1024; | |
22738 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22739 | return symtab; | |
22740 | } | |
22741 | ||
22742 | /* Destroy a mapped_symtab. */ | |
b89be57b | 22743 | |
9291a0cd TT |
22744 | static void |
22745 | cleanup_mapped_symtab (void *p) | |
22746 | { | |
9a3c8263 | 22747 | struct mapped_symtab *symtab = (struct mapped_symtab *) p; |
9291a0cd TT |
22748 | /* The contents of the array are freed when the other hash table is |
22749 | destroyed. */ | |
22750 | xfree (symtab->data); | |
22751 | xfree (symtab); | |
22752 | } | |
22753 | ||
22754 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
22755 | the slot. |
22756 | ||
22757 | Function is used only during write_hash_table so no index format backward | |
22758 | compatibility is needed. */ | |
b89be57b | 22759 | |
9291a0cd TT |
22760 | static struct symtab_index_entry ** |
22761 | find_slot (struct mapped_symtab *symtab, const char *name) | |
22762 | { | |
559a7a62 | 22763 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
22764 | |
22765 | index = hash & (symtab->size - 1); | |
22766 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
22767 | ||
22768 | for (;;) | |
22769 | { | |
22770 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
22771 | return &symtab->data[index]; | |
22772 | index = (index + step) & (symtab->size - 1); | |
22773 | } | |
22774 | } | |
22775 | ||
22776 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 22777 | |
9291a0cd TT |
22778 | static void |
22779 | hash_expand (struct mapped_symtab *symtab) | |
22780 | { | |
22781 | offset_type old_size = symtab->size; | |
22782 | offset_type i; | |
22783 | struct symtab_index_entry **old_entries = symtab->data; | |
22784 | ||
22785 | symtab->size *= 2; | |
22786 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22787 | ||
22788 | for (i = 0; i < old_size; ++i) | |
22789 | { | |
22790 | if (old_entries[i]) | |
22791 | { | |
22792 | struct symtab_index_entry **slot = find_slot (symtab, | |
22793 | old_entries[i]->name); | |
22794 | *slot = old_entries[i]; | |
22795 | } | |
22796 | } | |
22797 | ||
22798 | xfree (old_entries); | |
22799 | } | |
22800 | ||
156942c7 DE |
22801 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
22802 | CU_INDEX is the index of the CU in which the symbol appears. | |
22803 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 22804 | |
9291a0cd TT |
22805 | static void |
22806 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 22807 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
22808 | offset_type cu_index) |
22809 | { | |
22810 | struct symtab_index_entry **slot; | |
156942c7 | 22811 | offset_type cu_index_and_attrs; |
9291a0cd TT |
22812 | |
22813 | ++symtab->n_elements; | |
22814 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
22815 | hash_expand (symtab); | |
22816 | ||
22817 | slot = find_slot (symtab, name); | |
22818 | if (!*slot) | |
22819 | { | |
22820 | *slot = XNEW (struct symtab_index_entry); | |
22821 | (*slot)->name = name; | |
156942c7 | 22822 | /* index_offset is set later. */ |
9291a0cd TT |
22823 | (*slot)->cu_indices = NULL; |
22824 | } | |
156942c7 DE |
22825 | |
22826 | cu_index_and_attrs = 0; | |
22827 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
22828 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
22829 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
22830 | ||
22831 | /* We don't want to record an index value twice as we want to avoid the | |
22832 | duplication. | |
22833 | We process all global symbols and then all static symbols | |
22834 | (which would allow us to avoid the duplication by only having to check | |
22835 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
22836 | To keep things simple we don't worry about the duplication here and | |
22837 | sort and uniqufy the list after we've processed all symbols. */ | |
22838 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
22839 | } | |
22840 | ||
22841 | /* qsort helper routine for uniquify_cu_indices. */ | |
22842 | ||
22843 | static int | |
22844 | offset_type_compare (const void *ap, const void *bp) | |
22845 | { | |
22846 | offset_type a = *(offset_type *) ap; | |
22847 | offset_type b = *(offset_type *) bp; | |
22848 | ||
22849 | return (a > b) - (b > a); | |
22850 | } | |
22851 | ||
22852 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
22853 | ||
22854 | static void | |
22855 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
22856 | { | |
22857 | int i; | |
22858 | ||
22859 | for (i = 0; i < symtab->size; ++i) | |
22860 | { | |
22861 | struct symtab_index_entry *entry = symtab->data[i]; | |
22862 | ||
22863 | if (entry | |
22864 | && entry->cu_indices != NULL) | |
22865 | { | |
22866 | unsigned int next_to_insert, next_to_check; | |
22867 | offset_type last_value; | |
22868 | ||
22869 | qsort (VEC_address (offset_type, entry->cu_indices), | |
22870 | VEC_length (offset_type, entry->cu_indices), | |
22871 | sizeof (offset_type), offset_type_compare); | |
22872 | ||
22873 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
22874 | next_to_insert = 1; | |
22875 | for (next_to_check = 1; | |
22876 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
22877 | ++next_to_check) | |
22878 | { | |
22879 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
22880 | != last_value) | |
22881 | { | |
22882 | last_value = VEC_index (offset_type, entry->cu_indices, | |
22883 | next_to_check); | |
22884 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
22885 | last_value); | |
22886 | ++next_to_insert; | |
22887 | } | |
22888 | } | |
22889 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
22890 | } | |
22891 | } | |
9291a0cd TT |
22892 | } |
22893 | ||
22894 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 22895 | |
9291a0cd | 22896 | static offset_type |
3876f04e | 22897 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
22898 | struct symtab_index_entry *entry) |
22899 | { | |
22900 | void **slot; | |
22901 | ||
3876f04e | 22902 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
22903 | if (!*slot) |
22904 | { | |
22905 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
22906 | offset_type val = MAYBE_SWAP (len); | |
22907 | offset_type iter; | |
22908 | int i; | |
22909 | ||
22910 | *slot = entry; | |
22911 | entry->index_offset = obstack_object_size (cpool); | |
22912 | ||
22913 | obstack_grow (cpool, &val, sizeof (val)); | |
22914 | for (i = 0; | |
22915 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
22916 | ++i) | |
22917 | { | |
22918 | val = MAYBE_SWAP (iter); | |
22919 | obstack_grow (cpool, &val, sizeof (val)); | |
22920 | } | |
22921 | } | |
22922 | else | |
22923 | { | |
9a3c8263 SM |
22924 | struct symtab_index_entry *old_entry |
22925 | = (struct symtab_index_entry *) *slot; | |
9291a0cd TT |
22926 | entry->index_offset = old_entry->index_offset; |
22927 | entry = old_entry; | |
22928 | } | |
22929 | return entry->index_offset; | |
22930 | } | |
22931 | ||
22932 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
22933 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 22934 | |
9291a0cd TT |
22935 | static void |
22936 | write_hash_table (struct mapped_symtab *symtab, | |
22937 | struct obstack *output, struct obstack *cpool) | |
22938 | { | |
22939 | offset_type i; | |
3876f04e | 22940 | htab_t symbol_hash_table; |
9291a0cd TT |
22941 | htab_t str_table; |
22942 | ||
3876f04e | 22943 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 22944 | str_table = create_strtab (); |
3876f04e | 22945 | |
9291a0cd TT |
22946 | /* We add all the index vectors to the constant pool first, to |
22947 | ensure alignment is ok. */ | |
22948 | for (i = 0; i < symtab->size; ++i) | |
22949 | { | |
22950 | if (symtab->data[i]) | |
3876f04e | 22951 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
22952 | } |
22953 | ||
22954 | /* Now write out the hash table. */ | |
22955 | for (i = 0; i < symtab->size; ++i) | |
22956 | { | |
22957 | offset_type str_off, vec_off; | |
22958 | ||
22959 | if (symtab->data[i]) | |
22960 | { | |
22961 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
22962 | vec_off = symtab->data[i]->index_offset; | |
22963 | } | |
22964 | else | |
22965 | { | |
22966 | /* While 0 is a valid constant pool index, it is not valid | |
22967 | to have 0 for both offsets. */ | |
22968 | str_off = 0; | |
22969 | vec_off = 0; | |
22970 | } | |
22971 | ||
22972 | str_off = MAYBE_SWAP (str_off); | |
22973 | vec_off = MAYBE_SWAP (vec_off); | |
22974 | ||
22975 | obstack_grow (output, &str_off, sizeof (str_off)); | |
22976 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
22977 | } | |
22978 | ||
22979 | htab_delete (str_table); | |
3876f04e | 22980 | htab_delete (symbol_hash_table); |
9291a0cd TT |
22981 | } |
22982 | ||
0a5429f6 DE |
22983 | /* Struct to map psymtab to CU index in the index file. */ |
22984 | struct psymtab_cu_index_map | |
22985 | { | |
22986 | struct partial_symtab *psymtab; | |
22987 | unsigned int cu_index; | |
22988 | }; | |
22989 | ||
22990 | static hashval_t | |
22991 | hash_psymtab_cu_index (const void *item) | |
22992 | { | |
9a3c8263 SM |
22993 | const struct psymtab_cu_index_map *map |
22994 | = (const struct psymtab_cu_index_map *) item; | |
0a5429f6 DE |
22995 | |
22996 | return htab_hash_pointer (map->psymtab); | |
22997 | } | |
22998 | ||
22999 | static int | |
23000 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
23001 | { | |
9a3c8263 SM |
23002 | const struct psymtab_cu_index_map *lhs |
23003 | = (const struct psymtab_cu_index_map *) item_lhs; | |
23004 | const struct psymtab_cu_index_map *rhs | |
23005 | = (const struct psymtab_cu_index_map *) item_rhs; | |
0a5429f6 DE |
23006 | |
23007 | return lhs->psymtab == rhs->psymtab; | |
23008 | } | |
23009 | ||
23010 | /* Helper struct for building the address table. */ | |
23011 | struct addrmap_index_data | |
23012 | { | |
23013 | struct objfile *objfile; | |
23014 | struct obstack *addr_obstack; | |
23015 | htab_t cu_index_htab; | |
23016 | ||
23017 | /* Non-zero if the previous_* fields are valid. | |
23018 | We can't write an entry until we see the next entry (since it is only then | |
23019 | that we know the end of the entry). */ | |
23020 | int previous_valid; | |
23021 | /* Index of the CU in the table of all CUs in the index file. */ | |
23022 | unsigned int previous_cu_index; | |
0963b4bd | 23023 | /* Start address of the CU. */ |
0a5429f6 DE |
23024 | CORE_ADDR previous_cu_start; |
23025 | }; | |
23026 | ||
23027 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 23028 | |
9291a0cd | 23029 | static void |
0a5429f6 DE |
23030 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
23031 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 23032 | { |
0a5429f6 | 23033 | offset_type cu_index_to_write; |
948f8e3d | 23034 | gdb_byte addr[8]; |
9291a0cd TT |
23035 | CORE_ADDR baseaddr; |
23036 | ||
23037 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23038 | ||
0a5429f6 DE |
23039 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
23040 | obstack_grow (obstack, addr, 8); | |
23041 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
23042 | obstack_grow (obstack, addr, 8); | |
23043 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
23044 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
23045 | } | |
23046 | ||
23047 | /* Worker function for traversing an addrmap to build the address table. */ | |
23048 | ||
23049 | static int | |
23050 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
23051 | { | |
9a3c8263 SM |
23052 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
23053 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
23054 | |
23055 | if (data->previous_valid) | |
23056 | add_address_entry (data->objfile, data->addr_obstack, | |
23057 | data->previous_cu_start, start_addr, | |
23058 | data->previous_cu_index); | |
23059 | ||
23060 | data->previous_cu_start = start_addr; | |
23061 | if (pst != NULL) | |
23062 | { | |
23063 | struct psymtab_cu_index_map find_map, *map; | |
23064 | find_map.psymtab = pst; | |
9a3c8263 SM |
23065 | map = ((struct psymtab_cu_index_map *) |
23066 | htab_find (data->cu_index_htab, &find_map)); | |
0a5429f6 DE |
23067 | gdb_assert (map != NULL); |
23068 | data->previous_cu_index = map->cu_index; | |
23069 | data->previous_valid = 1; | |
23070 | } | |
23071 | else | |
23072 | data->previous_valid = 0; | |
23073 | ||
23074 | return 0; | |
23075 | } | |
23076 | ||
23077 | /* Write OBJFILE's address map to OBSTACK. | |
23078 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
23079 | in the index file. */ | |
23080 | ||
23081 | static void | |
23082 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
23083 | htab_t cu_index_htab) | |
23084 | { | |
23085 | struct addrmap_index_data addrmap_index_data; | |
23086 | ||
23087 | /* When writing the address table, we have to cope with the fact that | |
23088 | the addrmap iterator only provides the start of a region; we have to | |
23089 | wait until the next invocation to get the start of the next region. */ | |
23090 | ||
23091 | addrmap_index_data.objfile = objfile; | |
23092 | addrmap_index_data.addr_obstack = obstack; | |
23093 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
23094 | addrmap_index_data.previous_valid = 0; | |
23095 | ||
23096 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
23097 | &addrmap_index_data); | |
23098 | ||
23099 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
23100 | is valid, but we should still handle it. | |
23101 | The end address is recorded as the start of the next region, but that | |
23102 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
23103 | anyway. */ | |
23104 | if (addrmap_index_data.previous_valid) | |
23105 | add_address_entry (objfile, obstack, | |
23106 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
23107 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
23108 | } |
23109 | ||
156942c7 DE |
23110 | /* Return the symbol kind of PSYM. */ |
23111 | ||
23112 | static gdb_index_symbol_kind | |
23113 | symbol_kind (struct partial_symbol *psym) | |
23114 | { | |
23115 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
23116 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
23117 | ||
23118 | switch (domain) | |
23119 | { | |
23120 | case VAR_DOMAIN: | |
23121 | switch (aclass) | |
23122 | { | |
23123 | case LOC_BLOCK: | |
23124 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
23125 | case LOC_TYPEDEF: | |
23126 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23127 | case LOC_COMPUTED: | |
23128 | case LOC_CONST_BYTES: | |
23129 | case LOC_OPTIMIZED_OUT: | |
23130 | case LOC_STATIC: | |
23131 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23132 | case LOC_CONST: | |
23133 | /* Note: It's currently impossible to recognize psyms as enum values | |
23134 | short of reading the type info. For now punt. */ | |
23135 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23136 | default: | |
23137 | /* There are other LOC_FOO values that one might want to classify | |
23138 | as variables, but dwarf2read.c doesn't currently use them. */ | |
23139 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23140 | } | |
23141 | case STRUCT_DOMAIN: | |
23142 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23143 | default: | |
23144 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23145 | } | |
23146 | } | |
23147 | ||
9291a0cd | 23148 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 23149 | |
9291a0cd TT |
23150 | static void |
23151 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 23152 | htab_t psyms_seen, |
9291a0cd TT |
23153 | struct partial_symbol **psymp, |
23154 | int count, | |
987d643c TT |
23155 | offset_type cu_index, |
23156 | int is_static) | |
9291a0cd TT |
23157 | { |
23158 | for (; count-- > 0; ++psymp) | |
23159 | { | |
156942c7 DE |
23160 | struct partial_symbol *psym = *psymp; |
23161 | void **slot; | |
987d643c | 23162 | |
156942c7 | 23163 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 23164 | error (_("Ada is not currently supported by the index")); |
987d643c | 23165 | |
987d643c | 23166 | /* Only add a given psymbol once. */ |
156942c7 | 23167 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
23168 | if (!*slot) |
23169 | { | |
156942c7 DE |
23170 | gdb_index_symbol_kind kind = symbol_kind (psym); |
23171 | ||
23172 | *slot = psym; | |
23173 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
23174 | is_static, kind, cu_index); | |
987d643c | 23175 | } |
9291a0cd TT |
23176 | } |
23177 | } | |
23178 | ||
23179 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
23180 | exception if there is an error. */ | |
b89be57b | 23181 | |
9291a0cd TT |
23182 | static void |
23183 | write_obstack (FILE *file, struct obstack *obstack) | |
23184 | { | |
23185 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
23186 | file) | |
23187 | != obstack_object_size (obstack)) | |
23188 | error (_("couldn't data write to file")); | |
23189 | } | |
23190 | ||
23191 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 23192 | |
9291a0cd TT |
23193 | static void |
23194 | unlink_if_set (void *p) | |
23195 | { | |
9a3c8263 | 23196 | char **filename = (char **) p; |
9291a0cd TT |
23197 | if (*filename) |
23198 | unlink (*filename); | |
23199 | } | |
23200 | ||
1fd400ff TT |
23201 | /* A helper struct used when iterating over debug_types. */ |
23202 | struct signatured_type_index_data | |
23203 | { | |
23204 | struct objfile *objfile; | |
23205 | struct mapped_symtab *symtab; | |
23206 | struct obstack *types_list; | |
987d643c | 23207 | htab_t psyms_seen; |
1fd400ff TT |
23208 | int cu_index; |
23209 | }; | |
23210 | ||
23211 | /* A helper function that writes a single signatured_type to an | |
23212 | obstack. */ | |
b89be57b | 23213 | |
1fd400ff TT |
23214 | static int |
23215 | write_one_signatured_type (void **slot, void *d) | |
23216 | { | |
9a3c8263 SM |
23217 | struct signatured_type_index_data *info |
23218 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 23219 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 23220 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
23221 | gdb_byte val[8]; |
23222 | ||
23223 | write_psymbols (info->symtab, | |
987d643c | 23224 | info->psyms_seen, |
3e43a32a MS |
23225 | info->objfile->global_psymbols.list |
23226 | + psymtab->globals_offset, | |
987d643c TT |
23227 | psymtab->n_global_syms, info->cu_index, |
23228 | 0); | |
1fd400ff | 23229 | write_psymbols (info->symtab, |
987d643c | 23230 | info->psyms_seen, |
3e43a32a MS |
23231 | info->objfile->static_psymbols.list |
23232 | + psymtab->statics_offset, | |
987d643c TT |
23233 | psymtab->n_static_syms, info->cu_index, |
23234 | 1); | |
1fd400ff | 23235 | |
b64f50a1 JK |
23236 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23237 | entry->per_cu.offset.sect_off); | |
1fd400ff | 23238 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
23239 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23240 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
23241 | obstack_grow (info->types_list, val, 8); |
23242 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
23243 | obstack_grow (info->types_list, val, 8); | |
23244 | ||
23245 | ++info->cu_index; | |
23246 | ||
23247 | return 1; | |
23248 | } | |
23249 | ||
95554aad TT |
23250 | /* Recurse into all "included" dependencies and write their symbols as |
23251 | if they appeared in this psymtab. */ | |
23252 | ||
23253 | static void | |
23254 | recursively_write_psymbols (struct objfile *objfile, | |
23255 | struct partial_symtab *psymtab, | |
23256 | struct mapped_symtab *symtab, | |
23257 | htab_t psyms_seen, | |
23258 | offset_type cu_index) | |
23259 | { | |
23260 | int i; | |
23261 | ||
23262 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
23263 | if (psymtab->dependencies[i]->user != NULL) | |
23264 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
23265 | symtab, psyms_seen, cu_index); | |
23266 | ||
23267 | write_psymbols (symtab, | |
23268 | psyms_seen, | |
23269 | objfile->global_psymbols.list + psymtab->globals_offset, | |
23270 | psymtab->n_global_syms, cu_index, | |
23271 | 0); | |
23272 | write_psymbols (symtab, | |
23273 | psyms_seen, | |
23274 | objfile->static_psymbols.list + psymtab->statics_offset, | |
23275 | psymtab->n_static_syms, cu_index, | |
23276 | 1); | |
23277 | } | |
23278 | ||
9291a0cd | 23279 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 23280 | |
9291a0cd TT |
23281 | static void |
23282 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
23283 | { | |
23284 | struct cleanup *cleanup; | |
23285 | char *filename, *cleanup_filename; | |
1fd400ff TT |
23286 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
23287 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
23288 | int i; |
23289 | FILE *out_file; | |
23290 | struct mapped_symtab *symtab; | |
23291 | offset_type val, size_of_contents, total_len; | |
23292 | struct stat st; | |
987d643c | 23293 | htab_t psyms_seen; |
0a5429f6 DE |
23294 | htab_t cu_index_htab; |
23295 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 23296 | |
9291a0cd TT |
23297 | if (dwarf2_per_objfile->using_index) |
23298 | error (_("Cannot use an index to create the index")); | |
23299 | ||
8b70b953 TT |
23300 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
23301 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
23302 | ||
260b681b DE |
23303 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
23304 | return; | |
23305 | ||
4262abfb JK |
23306 | if (stat (objfile_name (objfile), &st) < 0) |
23307 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 23308 | |
4262abfb | 23309 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
23310 | INDEX_SUFFIX, (char *) NULL); |
23311 | cleanup = make_cleanup (xfree, filename); | |
23312 | ||
614c279d | 23313 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
23314 | if (!out_file) |
23315 | error (_("Can't open `%s' for writing"), filename); | |
23316 | ||
23317 | cleanup_filename = filename; | |
23318 | make_cleanup (unlink_if_set, &cleanup_filename); | |
23319 | ||
23320 | symtab = create_mapped_symtab (); | |
23321 | make_cleanup (cleanup_mapped_symtab, symtab); | |
23322 | ||
23323 | obstack_init (&addr_obstack); | |
23324 | make_cleanup_obstack_free (&addr_obstack); | |
23325 | ||
23326 | obstack_init (&cu_list); | |
23327 | make_cleanup_obstack_free (&cu_list); | |
23328 | ||
1fd400ff TT |
23329 | obstack_init (&types_cu_list); |
23330 | make_cleanup_obstack_free (&types_cu_list); | |
23331 | ||
987d643c TT |
23332 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
23333 | NULL, xcalloc, xfree); | |
96408a79 | 23334 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 23335 | |
0a5429f6 DE |
23336 | /* While we're scanning CU's create a table that maps a psymtab pointer |
23337 | (which is what addrmap records) to its index (which is what is recorded | |
23338 | in the index file). This will later be needed to write the address | |
23339 | table. */ | |
23340 | cu_index_htab = htab_create_alloc (100, | |
23341 | hash_psymtab_cu_index, | |
23342 | eq_psymtab_cu_index, | |
23343 | NULL, xcalloc, xfree); | |
96408a79 | 23344 | make_cleanup_htab_delete (cu_index_htab); |
8d749320 SM |
23345 | psymtab_cu_index_map = XNEWVEC (struct psymtab_cu_index_map, |
23346 | dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
23347 | make_cleanup (xfree, psymtab_cu_index_map); |
23348 | ||
23349 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
23350 | work here. Also, the debug_types entries do not appear in |
23351 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
23352 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
23353 | { | |
3e43a32a MS |
23354 | struct dwarf2_per_cu_data *per_cu |
23355 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 23356 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 23357 | gdb_byte val[8]; |
0a5429f6 DE |
23358 | struct psymtab_cu_index_map *map; |
23359 | void **slot; | |
9291a0cd | 23360 | |
92fac807 JK |
23361 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
23362 | It may be referenced from a local scope but in such case it does not | |
23363 | need to be present in .gdb_index. */ | |
23364 | if (psymtab == NULL) | |
23365 | continue; | |
23366 | ||
95554aad TT |
23367 | if (psymtab->user == NULL) |
23368 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 23369 | |
0a5429f6 DE |
23370 | map = &psymtab_cu_index_map[i]; |
23371 | map->psymtab = psymtab; | |
23372 | map->cu_index = i; | |
23373 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
23374 | gdb_assert (slot != NULL); | |
23375 | gdb_assert (*slot == NULL); | |
23376 | *slot = map; | |
9291a0cd | 23377 | |
b64f50a1 JK |
23378 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23379 | per_cu->offset.sect_off); | |
9291a0cd | 23380 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 23381 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
23382 | obstack_grow (&cu_list, val, 8); |
23383 | } | |
23384 | ||
0a5429f6 DE |
23385 | /* Dump the address map. */ |
23386 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
23387 | ||
1fd400ff TT |
23388 | /* Write out the .debug_type entries, if any. */ |
23389 | if (dwarf2_per_objfile->signatured_types) | |
23390 | { | |
23391 | struct signatured_type_index_data sig_data; | |
23392 | ||
23393 | sig_data.objfile = objfile; | |
23394 | sig_data.symtab = symtab; | |
23395 | sig_data.types_list = &types_cu_list; | |
987d643c | 23396 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
23397 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
23398 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
23399 | write_one_signatured_type, &sig_data); | |
23400 | } | |
23401 | ||
156942c7 DE |
23402 | /* Now that we've processed all symbols we can shrink their cu_indices |
23403 | lists. */ | |
23404 | uniquify_cu_indices (symtab); | |
23405 | ||
9291a0cd TT |
23406 | obstack_init (&constant_pool); |
23407 | make_cleanup_obstack_free (&constant_pool); | |
23408 | obstack_init (&symtab_obstack); | |
23409 | make_cleanup_obstack_free (&symtab_obstack); | |
23410 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
23411 | ||
23412 | obstack_init (&contents); | |
23413 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 23414 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
23415 | total_len = size_of_contents; |
23416 | ||
23417 | /* The version number. */ | |
796a7ff8 | 23418 | val = MAYBE_SWAP (8); |
9291a0cd TT |
23419 | obstack_grow (&contents, &val, sizeof (val)); |
23420 | ||
23421 | /* The offset of the CU list from the start of the file. */ | |
23422 | val = MAYBE_SWAP (total_len); | |
23423 | obstack_grow (&contents, &val, sizeof (val)); | |
23424 | total_len += obstack_object_size (&cu_list); | |
23425 | ||
1fd400ff TT |
23426 | /* The offset of the types CU list from the start of the file. */ |
23427 | val = MAYBE_SWAP (total_len); | |
23428 | obstack_grow (&contents, &val, sizeof (val)); | |
23429 | total_len += obstack_object_size (&types_cu_list); | |
23430 | ||
9291a0cd TT |
23431 | /* The offset of the address table from the start of the file. */ |
23432 | val = MAYBE_SWAP (total_len); | |
23433 | obstack_grow (&contents, &val, sizeof (val)); | |
23434 | total_len += obstack_object_size (&addr_obstack); | |
23435 | ||
23436 | /* The offset of the symbol table from the start of the file. */ | |
23437 | val = MAYBE_SWAP (total_len); | |
23438 | obstack_grow (&contents, &val, sizeof (val)); | |
23439 | total_len += obstack_object_size (&symtab_obstack); | |
23440 | ||
23441 | /* The offset of the constant pool from the start of the file. */ | |
23442 | val = MAYBE_SWAP (total_len); | |
23443 | obstack_grow (&contents, &val, sizeof (val)); | |
23444 | total_len += obstack_object_size (&constant_pool); | |
23445 | ||
23446 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
23447 | ||
23448 | write_obstack (out_file, &contents); | |
23449 | write_obstack (out_file, &cu_list); | |
1fd400ff | 23450 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
23451 | write_obstack (out_file, &addr_obstack); |
23452 | write_obstack (out_file, &symtab_obstack); | |
23453 | write_obstack (out_file, &constant_pool); | |
23454 | ||
23455 | fclose (out_file); | |
23456 | ||
23457 | /* We want to keep the file, so we set cleanup_filename to NULL | |
23458 | here. See unlink_if_set. */ | |
23459 | cleanup_filename = NULL; | |
23460 | ||
23461 | do_cleanups (cleanup); | |
23462 | } | |
23463 | ||
90476074 TT |
23464 | /* Implementation of the `save gdb-index' command. |
23465 | ||
23466 | Note that the file format used by this command is documented in the | |
23467 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 23468 | |
9291a0cd TT |
23469 | static void |
23470 | save_gdb_index_command (char *arg, int from_tty) | |
23471 | { | |
23472 | struct objfile *objfile; | |
23473 | ||
23474 | if (!arg || !*arg) | |
96d19272 | 23475 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
23476 | |
23477 | ALL_OBJFILES (objfile) | |
23478 | { | |
23479 | struct stat st; | |
23480 | ||
23481 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 23482 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
23483 | continue; |
23484 | ||
9a3c8263 SM |
23485 | dwarf2_per_objfile |
23486 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23487 | dwarf2_objfile_data_key); | |
9291a0cd TT |
23488 | if (dwarf2_per_objfile) |
23489 | { | |
9291a0cd | 23490 | |
492d29ea | 23491 | TRY |
9291a0cd TT |
23492 | { |
23493 | write_psymtabs_to_index (objfile, arg); | |
23494 | } | |
492d29ea PA |
23495 | CATCH (except, RETURN_MASK_ERROR) |
23496 | { | |
23497 | exception_fprintf (gdb_stderr, except, | |
23498 | _("Error while writing index for `%s': "), | |
23499 | objfile_name (objfile)); | |
23500 | } | |
23501 | END_CATCH | |
9291a0cd TT |
23502 | } |
23503 | } | |
dce234bc PP |
23504 | } |
23505 | ||
9291a0cd TT |
23506 | \f |
23507 | ||
b4f54984 | 23508 | int dwarf_always_disassemble; |
9eae7c52 TT |
23509 | |
23510 | static void | |
b4f54984 DE |
23511 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
23512 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 23513 | { |
3e43a32a MS |
23514 | fprintf_filtered (file, |
23515 | _("Whether to always disassemble " | |
23516 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
23517 | value); |
23518 | } | |
23519 | ||
900e11f9 JK |
23520 | static void |
23521 | show_check_physname (struct ui_file *file, int from_tty, | |
23522 | struct cmd_list_element *c, const char *value) | |
23523 | { | |
23524 | fprintf_filtered (file, | |
23525 | _("Whether to check \"physname\" is %s.\n"), | |
23526 | value); | |
23527 | } | |
23528 | ||
6502dd73 DJ |
23529 | void _initialize_dwarf2_read (void); |
23530 | ||
23531 | void | |
23532 | _initialize_dwarf2_read (void) | |
23533 | { | |
96d19272 JK |
23534 | struct cmd_list_element *c; |
23535 | ||
dce234bc | 23536 | dwarf2_objfile_data_key |
c1bd65d0 | 23537 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 23538 | |
b4f54984 DE |
23539 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
23540 | Set DWARF specific variables.\n\ | |
23541 | Configure DWARF variables such as the cache size"), | |
23542 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
23543 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
23544 | ||
b4f54984 DE |
23545 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
23546 | Show DWARF specific variables\n\ | |
23547 | Show DWARF variables such as the cache size"), | |
23548 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
23549 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
23550 | ||
23551 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
23552 | &dwarf_max_cache_age, _("\ |
23553 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
23554 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
23555 | A higher limit means that cached compilation units will be stored\n\ |
23556 | in memory longer, and more total memory will be used. Zero disables\n\ | |
23557 | caching, which can slow down startup."), | |
2c5b56ce | 23558 | NULL, |
b4f54984 DE |
23559 | show_dwarf_max_cache_age, |
23560 | &set_dwarf_cmdlist, | |
23561 | &show_dwarf_cmdlist); | |
d97bc12b | 23562 | |
9eae7c52 | 23563 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 23564 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
23565 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
23566 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
23567 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
23568 | syntax. When disabled, expressions will be printed in a more\n\ | |
23569 | conversational style, when possible."), | |
23570 | NULL, | |
b4f54984 DE |
23571 | show_dwarf_always_disassemble, |
23572 | &set_dwarf_cmdlist, | |
23573 | &show_dwarf_cmdlist); | |
23574 | ||
23575 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
23576 | Set debugging of the DWARF reader."), _("\ | |
23577 | Show debugging of the DWARF reader."), _("\ | |
23578 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
23579 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
23580 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
23581 | NULL, |
23582 | NULL, | |
23583 | &setdebuglist, &showdebuglist); | |
23584 | ||
b4f54984 DE |
23585 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
23586 | Set debugging of the DWARF DIE reader."), _("\ | |
23587 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
23588 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
23589 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
23590 | NULL, |
23591 | NULL, | |
23592 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23593 | |
27e0867f DE |
23594 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
23595 | Set debugging of the dwarf line reader."), _("\ | |
23596 | Show debugging of the dwarf line reader."), _("\ | |
23597 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
23598 | A value of 1 (one) provides basic information.\n\ | |
23599 | A value greater than 1 provides more verbose information."), | |
23600 | NULL, | |
23601 | NULL, | |
23602 | &setdebuglist, &showdebuglist); | |
23603 | ||
900e11f9 JK |
23604 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
23605 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
23606 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
23607 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
23608 | the demangler."), | |
23609 | NULL, show_check_physname, | |
23610 | &setdebuglist, &showdebuglist); | |
23611 | ||
e615022a DE |
23612 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
23613 | no_class, &use_deprecated_index_sections, _("\ | |
23614 | Set whether to use deprecated gdb_index sections."), _("\ | |
23615 | Show whether to use deprecated gdb_index sections."), _("\ | |
23616 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
23617 | Normally they are ignored either because of a missing feature or\n\ | |
23618 | performance issue.\n\ | |
23619 | Warning: This option must be enabled before gdb reads the file."), | |
23620 | NULL, | |
23621 | NULL, | |
23622 | &setlist, &showlist); | |
23623 | ||
96d19272 | 23624 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 23625 | _("\ |
fc1a9d6e | 23626 | Save a gdb-index file.\n\ |
11570e71 | 23627 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
23628 | &save_cmdlist); |
23629 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
23630 | |
23631 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23632 | &dwarf2_locexpr_funcs); | |
23633 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23634 | &dwarf2_loclist_funcs); | |
23635 | ||
23636 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23637 | &dwarf2_block_frame_base_locexpr_funcs); | |
23638 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23639 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 23640 | } |