Commit | Line | Data |
---|---|---|
c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
61baf725 | 3 | Copyright (C) 1994-2017 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 | 55 | #include "typeprint.h" |
ccefe4c4 | 56 | #include "psympriv.h" |
53ce3c39 | 57 | #include <sys/stat.h> |
96d19272 | 58 | #include "completer.h" |
34eaf542 | 59 | #include "vec.h" |
98bfdba5 | 60 | #include "c-lang.h" |
a766d390 | 61 | #include "go-lang.h" |
98bfdba5 | 62 | #include "valprint.h" |
3019eac3 | 63 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 64 | #include "gdb/gdb-index.h" |
60d5a603 | 65 | #include <ctype.h> |
cbb099e8 | 66 | #include "gdb_bfd.h" |
4357ac6c | 67 | #include "f-lang.h" |
05cba821 | 68 | #include "source.h" |
614c279d | 69 | #include "filestuff.h" |
dc294be5 | 70 | #include "build-id.h" |
22cee43f | 71 | #include "namespace.h" |
4c2df51b | 72 | |
c906108c | 73 | #include <fcntl.h> |
c906108c | 74 | #include <sys/types.h> |
325fac50 | 75 | #include <algorithm> |
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 | 1107 | |
0c1b455e TT |
1108 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1109 | unsigned int main_subprogram : 1; | |
1110 | ||
72bf9492 DJ |
1111 | /* Flag set if the SCOPE field of this structure has been |
1112 | computed. */ | |
1113 | unsigned int scope_set : 1; | |
1114 | ||
fa4028e9 JB |
1115 | /* Flag set if the DIE has a byte_size attribute. */ |
1116 | unsigned int has_byte_size : 1; | |
1117 | ||
ff908ebf AW |
1118 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1119 | unsigned int has_const_value : 1; | |
1120 | ||
98bfdba5 PA |
1121 | /* Flag set if any of the DIE's children are template arguments. */ |
1122 | unsigned int has_template_arguments : 1; | |
1123 | ||
abc72ce4 DE |
1124 | /* Flag set if fixup_partial_die has been called on this die. */ |
1125 | unsigned int fixup_called : 1; | |
1126 | ||
36586728 TT |
1127 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1128 | unsigned int is_dwz : 1; | |
1129 | ||
1130 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1131 | unsigned int spec_is_dwz : 1; | |
1132 | ||
72bf9492 | 1133 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1134 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1135 | const char *name; |
72bf9492 | 1136 | |
abc72ce4 DE |
1137 | /* The linkage name, if present. */ |
1138 | const char *linkage_name; | |
1139 | ||
72bf9492 DJ |
1140 | /* The scope to prepend to our children. This is generally |
1141 | allocated on the comp_unit_obstack, so will disappear | |
1142 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1143 | const char *scope; |
72bf9492 | 1144 | |
95554aad TT |
1145 | /* Some data associated with the partial DIE. The tag determines |
1146 | which field is live. */ | |
1147 | union | |
1148 | { | |
1149 | /* The location description associated with this DIE, if any. */ | |
1150 | struct dwarf_block *locdesc; | |
1151 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1152 | sect_offset offset; | |
1153 | } d; | |
72bf9492 DJ |
1154 | |
1155 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1156 | CORE_ADDR lowpc; |
1157 | CORE_ADDR highpc; | |
72bf9492 | 1158 | |
93311388 | 1159 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1160 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1161 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1162 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1163 | const gdb_byte *sibling; |
72bf9492 DJ |
1164 | |
1165 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1166 | DW_AT_specification (or DW_AT_abstract_origin or | |
1167 | DW_AT_extension). */ | |
b64f50a1 | 1168 | sect_offset spec_offset; |
72bf9492 DJ |
1169 | |
1170 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1171 | if any. */ | |
1172 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1173 | }; |
1174 | ||
0963b4bd | 1175 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1176 | struct abbrev_info |
1177 | { | |
1178 | unsigned int number; /* number identifying abbrev */ | |
1179 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1180 | unsigned short has_children; /* boolean */ |
1181 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1182 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1183 | struct abbrev_info *next; /* next in chain */ | |
1184 | }; | |
1185 | ||
1186 | struct attr_abbrev | |
1187 | { | |
9d25dd43 DE |
1188 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1189 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1190 | }; |
1191 | ||
433df2d4 DE |
1192 | /* Size of abbrev_table.abbrev_hash_table. */ |
1193 | #define ABBREV_HASH_SIZE 121 | |
1194 | ||
1195 | /* Top level data structure to contain an abbreviation table. */ | |
1196 | ||
1197 | struct abbrev_table | |
1198 | { | |
f4dc4d17 DE |
1199 | /* Where the abbrev table came from. |
1200 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1201 | sect_offset offset; |
1202 | ||
1203 | /* Storage for the abbrev table. */ | |
1204 | struct obstack abbrev_obstack; | |
1205 | ||
1206 | /* Hash table of abbrevs. | |
1207 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1208 | It could be statically allocated, but the previous code didn't so we | |
1209 | don't either. */ | |
1210 | struct abbrev_info **abbrevs; | |
1211 | }; | |
1212 | ||
0963b4bd | 1213 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1214 | struct attribute |
1215 | { | |
9d25dd43 | 1216 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1217 | ENUM_BITFIELD(dwarf_form) form : 15; |
1218 | ||
1219 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1220 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1221 | here for better struct attribute alignment. */ | |
1222 | unsigned int string_is_canonical : 1; | |
1223 | ||
b60c80d6 DJ |
1224 | union |
1225 | { | |
15d034d0 | 1226 | const char *str; |
b60c80d6 | 1227 | struct dwarf_block *blk; |
43bbcdc2 PH |
1228 | ULONGEST unsnd; |
1229 | LONGEST snd; | |
b60c80d6 | 1230 | CORE_ADDR addr; |
ac9ec31b | 1231 | ULONGEST signature; |
b60c80d6 DJ |
1232 | } |
1233 | u; | |
1234 | }; | |
1235 | ||
0963b4bd | 1236 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1237 | struct die_info |
1238 | { | |
76815b17 DE |
1239 | /* DWARF-2 tag for this DIE. */ |
1240 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1241 | ||
1242 | /* Number of attributes */ | |
98bfdba5 PA |
1243 | unsigned char num_attrs; |
1244 | ||
1245 | /* True if we're presently building the full type name for the | |
1246 | type derived from this DIE. */ | |
1247 | unsigned char building_fullname : 1; | |
76815b17 | 1248 | |
adde2bff DE |
1249 | /* True if this die is in process. PR 16581. */ |
1250 | unsigned char in_process : 1; | |
1251 | ||
76815b17 DE |
1252 | /* Abbrev number */ |
1253 | unsigned int abbrev; | |
1254 | ||
93311388 | 1255 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1256 | sect_offset offset; |
78ba4af6 JB |
1257 | |
1258 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1259 | points to this die's parent; CHILD points to the first child of | |
1260 | this node; and all the children of a given node are chained | |
4950bc1c | 1261 | together via their SIBLING fields. */ |
639d11d3 DC |
1262 | struct die_info *child; /* Its first child, if any. */ |
1263 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1264 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1265 | |
b60c80d6 DJ |
1266 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1267 | zero, but it's not common and zero-sized arrays are not | |
1268 | sufficiently portable C. */ | |
1269 | struct attribute attrs[1]; | |
c906108c SS |
1270 | }; |
1271 | ||
0963b4bd | 1272 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1273 | |
1274 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1275 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1276 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1277 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1278 | #define DW_SND(attr) ((attr)->u.snd) | |
1279 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1280 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1281 | |
0963b4bd | 1282 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1283 | struct dwarf_block |
1284 | { | |
56eb65bd | 1285 | size_t size; |
1d6edc3c JK |
1286 | |
1287 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1288 | const gdb_byte *data; |
c906108c SS |
1289 | }; |
1290 | ||
c906108c SS |
1291 | #ifndef ATTR_ALLOC_CHUNK |
1292 | #define ATTR_ALLOC_CHUNK 4 | |
1293 | #endif | |
1294 | ||
c906108c SS |
1295 | /* Allocate fields for structs, unions and enums in this size. */ |
1296 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1297 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1298 | #endif | |
1299 | ||
c906108c SS |
1300 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1301 | but this would require a corresponding change in unpack_field_as_long | |
1302 | and friends. */ | |
1303 | static int bits_per_byte = 8; | |
1304 | ||
52059ffd TT |
1305 | struct nextfield |
1306 | { | |
1307 | struct nextfield *next; | |
1308 | int accessibility; | |
1309 | int virtuality; | |
1310 | struct field field; | |
1311 | }; | |
1312 | ||
1313 | struct nextfnfield | |
1314 | { | |
1315 | struct nextfnfield *next; | |
1316 | struct fn_field fnfield; | |
1317 | }; | |
1318 | ||
1319 | struct fnfieldlist | |
1320 | { | |
1321 | const char *name; | |
1322 | int length; | |
1323 | struct nextfnfield *head; | |
1324 | }; | |
1325 | ||
1326 | struct typedef_field_list | |
1327 | { | |
1328 | struct typedef_field field; | |
1329 | struct typedef_field_list *next; | |
1330 | }; | |
1331 | ||
c906108c SS |
1332 | /* The routines that read and process dies for a C struct or C++ class |
1333 | pass lists of data member fields and lists of member function fields | |
1334 | in an instance of a field_info structure, as defined below. */ | |
1335 | struct field_info | |
c5aa993b | 1336 | { |
0963b4bd | 1337 | /* List of data member and baseclasses fields. */ |
52059ffd | 1338 | struct nextfield *fields, *baseclasses; |
c906108c | 1339 | |
7d0ccb61 | 1340 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1341 | int nfields; |
c906108c | 1342 | |
c5aa993b JM |
1343 | /* Number of baseclasses. */ |
1344 | int nbaseclasses; | |
c906108c | 1345 | |
c5aa993b JM |
1346 | /* Set if the accesibility of one of the fields is not public. */ |
1347 | int non_public_fields; | |
c906108c | 1348 | |
c5aa993b JM |
1349 | /* Member function fields array, entries are allocated in the order they |
1350 | are encountered in the object file. */ | |
52059ffd | 1351 | struct nextfnfield *fnfields; |
c906108c | 1352 | |
c5aa993b JM |
1353 | /* Member function fieldlist array, contains name of possibly overloaded |
1354 | member function, number of overloaded member functions and a pointer | |
1355 | to the head of the member function field chain. */ | |
52059ffd | 1356 | struct fnfieldlist *fnfieldlists; |
c906108c | 1357 | |
c5aa993b JM |
1358 | /* Number of entries in the fnfieldlists array. */ |
1359 | int nfnfields; | |
98751a41 JK |
1360 | |
1361 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1362 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1363 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1364 | unsigned typedef_field_list_count; |
c5aa993b | 1365 | }; |
c906108c | 1366 | |
10b3939b DJ |
1367 | /* One item on the queue of compilation units to read in full symbols |
1368 | for. */ | |
1369 | struct dwarf2_queue_item | |
1370 | { | |
1371 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1372 | enum language pretend_language; |
10b3939b DJ |
1373 | struct dwarf2_queue_item *next; |
1374 | }; | |
1375 | ||
1376 | /* The current queue. */ | |
1377 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1378 | ||
ae038cb0 DJ |
1379 | /* Loaded secondary compilation units are kept in memory until they |
1380 | have not been referenced for the processing of this many | |
1381 | compilation units. Set this to zero to disable caching. Cache | |
1382 | sizes of up to at least twenty will improve startup time for | |
1383 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1384 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1385 | static void |
b4f54984 DE |
1386 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1387 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1388 | { |
3e43a32a | 1389 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1390 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1391 | value); |
1392 | } | |
4390d890 | 1393 | \f |
c906108c SS |
1394 | /* local function prototypes */ |
1395 | ||
a32a8923 DE |
1396 | static const char *get_section_name (const struct dwarf2_section_info *); |
1397 | ||
1398 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1399 | ||
4efb68b1 | 1400 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1401 | |
918dd910 JK |
1402 | static void dwarf2_find_base_address (struct die_info *die, |
1403 | struct dwarf2_cu *cu); | |
1404 | ||
0018ea6f DE |
1405 | static struct partial_symtab *create_partial_symtab |
1406 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1407 | ||
c67a9c90 | 1408 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1409 | |
72bf9492 DJ |
1410 | static void scan_partial_symbols (struct partial_die_info *, |
1411 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1412 | int, struct dwarf2_cu *); |
c906108c | 1413 | |
72bf9492 DJ |
1414 | static void add_partial_symbol (struct partial_die_info *, |
1415 | struct dwarf2_cu *); | |
63d06c5c | 1416 | |
72bf9492 DJ |
1417 | static void add_partial_namespace (struct partial_die_info *pdi, |
1418 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1419 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1420 | |
5d7cb8df | 1421 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1422 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1423 | struct dwarf2_cu *cu); |
1424 | ||
72bf9492 DJ |
1425 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1426 | struct dwarf2_cu *cu); | |
91c24f0a | 1427 | |
bc30ff58 JB |
1428 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1429 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1430 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1431 | |
257e7a09 YQ |
1432 | static void dwarf2_read_symtab (struct partial_symtab *, |
1433 | struct objfile *); | |
c906108c | 1434 | |
a14ed312 | 1435 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1436 | |
433df2d4 DE |
1437 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1438 | (const struct abbrev_table *, unsigned int); | |
1439 | ||
1440 | static struct abbrev_table *abbrev_table_read_table | |
1441 | (struct dwarf2_section_info *, sect_offset); | |
1442 | ||
1443 | static void abbrev_table_free (struct abbrev_table *); | |
1444 | ||
f4dc4d17 DE |
1445 | static void abbrev_table_free_cleanup (void *); |
1446 | ||
dee91e82 DE |
1447 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1448 | struct dwarf2_section_info *); | |
c906108c | 1449 | |
f3dd6933 | 1450 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1451 | |
d521ce57 | 1452 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1453 | |
dee91e82 | 1454 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1455 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1456 | |
d521ce57 TT |
1457 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1458 | struct partial_die_info *, | |
1459 | struct abbrev_info *, | |
1460 | unsigned int, | |
1461 | const gdb_byte *); | |
c906108c | 1462 | |
36586728 | 1463 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1464 | struct dwarf2_cu *); |
72bf9492 DJ |
1465 | |
1466 | static void fixup_partial_die (struct partial_die_info *, | |
1467 | struct dwarf2_cu *); | |
1468 | ||
d521ce57 TT |
1469 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1470 | struct attribute *, struct attr_abbrev *, | |
1471 | const gdb_byte *); | |
a8329558 | 1472 | |
a1855c1d | 1473 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1474 | |
a1855c1d | 1475 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1476 | |
a1855c1d | 1477 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1478 | |
a1855c1d | 1479 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1480 | |
a1855c1d | 1481 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1482 | |
d521ce57 | 1483 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1484 | unsigned int *); |
c906108c | 1485 | |
d521ce57 | 1486 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1487 | |
1488 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1489 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1490 | unsigned int *, unsigned int *); |
613e1657 | 1491 | |
d521ce57 TT |
1492 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1493 | const struct comp_unit_head *, | |
c764a876 DE |
1494 | unsigned int *); |
1495 | ||
d521ce57 | 1496 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1497 | |
f4dc4d17 DE |
1498 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1499 | sect_offset); | |
1500 | ||
d521ce57 | 1501 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1502 | |
d521ce57 | 1503 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1504 | |
d521ce57 TT |
1505 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1506 | const struct comp_unit_head *, | |
1507 | unsigned int *); | |
4bdf3d34 | 1508 | |
d521ce57 | 1509 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1510 | |
d521ce57 | 1511 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1512 | |
d521ce57 | 1513 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1514 | |
d521ce57 TT |
1515 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1516 | const gdb_byte *, | |
3019eac3 DE |
1517 | unsigned int *); |
1518 | ||
d521ce57 | 1519 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1520 | ULONGEST str_index); |
3019eac3 | 1521 | |
e142c38c | 1522 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1523 | |
e142c38c DJ |
1524 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1525 | struct dwarf2_cu *); | |
c906108c | 1526 | |
348e048f | 1527 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1528 | unsigned int); |
348e048f | 1529 | |
7d45c7c3 KB |
1530 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1531 | struct dwarf2_cu *cu); | |
1532 | ||
05cf31d1 JB |
1533 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1534 | struct dwarf2_cu *cu); | |
1535 | ||
e142c38c | 1536 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1537 | |
e142c38c | 1538 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1539 | struct dwarf2_cu **); |
63d06c5c | 1540 | |
debd256d JB |
1541 | static void free_line_header (struct line_header *lh); |
1542 | ||
3019eac3 DE |
1543 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1544 | struct dwarf2_cu *cu); | |
debd256d | 1545 | |
f3f5162e | 1546 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1547 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1548 | CORE_ADDR, int decode_mapping); |
c906108c | 1549 | |
4d663531 | 1550 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1551 | |
43f3e411 DE |
1552 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1553 | const char *, const char *, | |
1554 | CORE_ADDR); | |
f4dc4d17 | 1555 | |
a14ed312 | 1556 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1557 | struct dwarf2_cu *); |
c906108c | 1558 | |
34eaf542 TT |
1559 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1560 | struct dwarf2_cu *, struct symbol *); | |
1561 | ||
ff39bb5e | 1562 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1563 | struct dwarf2_cu *); |
c906108c | 1564 | |
ff39bb5e | 1565 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1566 | struct type *type, |
1567 | const char *name, | |
1568 | struct obstack *obstack, | |
12df843f | 1569 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1570 | const gdb_byte **bytes, |
98bfdba5 | 1571 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1572 | |
e7c27a73 | 1573 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1574 | |
b4ba55a1 JB |
1575 | static int need_gnat_info (struct dwarf2_cu *); |
1576 | ||
3e43a32a MS |
1577 | static struct type *die_descriptive_type (struct die_info *, |
1578 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1579 | |
1580 | static void set_descriptive_type (struct type *, struct die_info *, | |
1581 | struct dwarf2_cu *); | |
1582 | ||
e7c27a73 DJ |
1583 | static struct type *die_containing_type (struct die_info *, |
1584 | struct dwarf2_cu *); | |
c906108c | 1585 | |
ff39bb5e | 1586 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1587 | struct dwarf2_cu *); |
c906108c | 1588 | |
f792889a | 1589 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1590 | |
673bfd45 DE |
1591 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1592 | ||
0d5cff50 | 1593 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1594 | |
6e70227d | 1595 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1596 | const char *suffix, int physname, |
1597 | struct dwarf2_cu *cu); | |
63d06c5c | 1598 | |
e7c27a73 | 1599 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1600 | |
348e048f DE |
1601 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1602 | ||
e7c27a73 | 1603 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1604 | |
e7c27a73 | 1605 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1606 | |
96408a79 SA |
1607 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1608 | ||
ff013f42 JK |
1609 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1610 | struct dwarf2_cu *, struct partial_symtab *); | |
1611 | ||
3a2b436a | 1612 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1613 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1614 | enum pc_bounds_kind |
1615 | { | |
e385593e | 1616 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1617 | PC_BOUNDS_NOT_PRESENT, |
1618 | ||
e385593e JK |
1619 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1620 | were present but they do not form a valid range of PC addresses. */ | |
1621 | PC_BOUNDS_INVALID, | |
1622 | ||
3a2b436a JK |
1623 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1624 | PC_BOUNDS_RANGES, | |
1625 | ||
1626 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1627 | PC_BOUNDS_HIGH_LOW, | |
1628 | }; | |
1629 | ||
1630 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1631 | CORE_ADDR *, CORE_ADDR *, | |
1632 | struct dwarf2_cu *, | |
1633 | struct partial_symtab *); | |
c906108c | 1634 | |
fae299cd DC |
1635 | static void get_scope_pc_bounds (struct die_info *, |
1636 | CORE_ADDR *, CORE_ADDR *, | |
1637 | struct dwarf2_cu *); | |
1638 | ||
801e3a5b JB |
1639 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1640 | CORE_ADDR, struct dwarf2_cu *); | |
1641 | ||
a14ed312 | 1642 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1643 | struct dwarf2_cu *); |
c906108c | 1644 | |
a14ed312 | 1645 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1646 | struct type *, struct dwarf2_cu *); |
c906108c | 1647 | |
a14ed312 | 1648 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1649 | struct die_info *, struct type *, |
e7c27a73 | 1650 | struct dwarf2_cu *); |
c906108c | 1651 | |
a14ed312 | 1652 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1653 | struct type *, |
1654 | struct dwarf2_cu *); | |
c906108c | 1655 | |
134d01f1 | 1656 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1657 | |
e7c27a73 | 1658 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1659 | |
e7c27a73 | 1660 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1661 | |
5d7cb8df JK |
1662 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1663 | ||
22cee43f PMR |
1664 | static struct using_direct **using_directives (enum language); |
1665 | ||
27aa8d6a SW |
1666 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1667 | ||
74921315 KS |
1668 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1669 | ||
f55ee35c JK |
1670 | static struct type *read_module_type (struct die_info *die, |
1671 | struct dwarf2_cu *cu); | |
1672 | ||
38d518c9 | 1673 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1674 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1675 | |
134d01f1 | 1676 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1677 | |
e7c27a73 | 1678 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1679 | |
6e70227d | 1680 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1681 | struct dwarf2_cu *); |
1682 | ||
bf6af496 | 1683 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1684 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1685 | struct die_info *); |
639d11d3 | 1686 | |
dee91e82 | 1687 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1688 | const gdb_byte *info_ptr, |
1689 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1690 | struct die_info *parent); |
1691 | ||
d521ce57 TT |
1692 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1693 | struct die_info **, const gdb_byte *, | |
1694 | int *, int); | |
3019eac3 | 1695 | |
d521ce57 TT |
1696 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1697 | struct die_info **, const gdb_byte *, | |
1698 | int *); | |
93311388 | 1699 | |
e7c27a73 | 1700 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1701 | |
15d034d0 TT |
1702 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1703 | struct obstack *); | |
71c25dea | 1704 | |
15d034d0 | 1705 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1706 | |
15d034d0 | 1707 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1708 | struct die_info *die, |
1709 | struct dwarf2_cu *cu); | |
1710 | ||
ca69b9e6 DE |
1711 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1712 | struct dwarf2_cu *cu); | |
1713 | ||
e142c38c | 1714 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1715 | struct dwarf2_cu **); |
9219021c | 1716 | |
f39c6ffd | 1717 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1718 | |
f39c6ffd | 1719 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1720 | |
f39c6ffd | 1721 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1722 | |
a14ed312 | 1723 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1724 | |
f39c6ffd | 1725 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1726 | |
f9aca02d | 1727 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1728 | |
d97bc12b DE |
1729 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1730 | ||
1731 | static void dump_die_for_error (struct die_info *); | |
1732 | ||
1733 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1734 | struct die_info *); | |
c906108c | 1735 | |
d97bc12b | 1736 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1737 | |
51545339 | 1738 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1739 | struct dwarf2_cu *); |
c906108c | 1740 | |
ff39bb5e | 1741 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1742 | |
ff39bb5e | 1743 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1744 | |
348e048f | 1745 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1746 | const struct attribute *, |
348e048f DE |
1747 | struct dwarf2_cu **); |
1748 | ||
10b3939b | 1749 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1750 | const struct attribute *, |
f2f0e013 | 1751 | struct dwarf2_cu **); |
c906108c | 1752 | |
348e048f | 1753 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1754 | const struct attribute *, |
348e048f DE |
1755 | struct dwarf2_cu **); |
1756 | ||
ac9ec31b DE |
1757 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1758 | struct dwarf2_cu *); | |
1759 | ||
1760 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1761 | const struct attribute *, |
ac9ec31b DE |
1762 | struct dwarf2_cu *); |
1763 | ||
e5fe5e75 | 1764 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1765 | |
52dc124a | 1766 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1767 | |
63e43d3a PMR |
1768 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1769 | struct die_info *die, struct dwarf2_cu *cu, | |
1770 | struct dynamic_prop *prop); | |
1771 | ||
c906108c SS |
1772 | /* memory allocation interface */ |
1773 | ||
7b5a2f43 | 1774 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1775 | |
b60c80d6 | 1776 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1777 | |
43f3e411 | 1778 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1779 | |
6e5a29e1 | 1780 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1781 | |
6e5a29e1 | 1782 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1783 | |
6e5a29e1 | 1784 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1785 | |
6e5a29e1 | 1786 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1787 | |
8cf6f0b1 TT |
1788 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1789 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1790 | const struct attribute *attr); |
8cf6f0b1 | 1791 | |
ff39bb5e | 1792 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1793 | struct symbol *sym, |
f1e6e072 TT |
1794 | struct dwarf2_cu *cu, |
1795 | int is_block); | |
4c2df51b | 1796 | |
d521ce57 TT |
1797 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1798 | const gdb_byte *info_ptr, | |
1799 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1800 | |
72bf9492 DJ |
1801 | static void free_stack_comp_unit (void *); |
1802 | ||
72bf9492 DJ |
1803 | static hashval_t partial_die_hash (const void *item); |
1804 | ||
1805 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1806 | ||
ae038cb0 | 1807 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1808 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1809 | |
9816fde3 | 1810 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1811 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1812 | |
1813 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1814 | struct die_info *comp_unit_die, |
1815 | enum language pretend_language); | |
93311388 | 1816 | |
68dc6402 | 1817 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1818 | |
1819 | static void free_cached_comp_units (void *); | |
1820 | ||
1821 | static void age_cached_comp_units (void); | |
1822 | ||
dee91e82 | 1823 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1824 | |
f792889a DJ |
1825 | static struct type *set_die_type (struct die_info *, struct type *, |
1826 | struct dwarf2_cu *); | |
1c379e20 | 1827 | |
ae038cb0 DJ |
1828 | static void create_all_comp_units (struct objfile *); |
1829 | ||
0e50663e | 1830 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1831 | |
95554aad TT |
1832 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1833 | enum language); | |
10b3939b | 1834 | |
95554aad TT |
1835 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1836 | enum language); | |
10b3939b | 1837 | |
f4dc4d17 DE |
1838 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1839 | enum language); | |
1840 | ||
10b3939b DJ |
1841 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1842 | struct dwarf2_per_cu_data *); | |
1843 | ||
ae038cb0 DJ |
1844 | static void dwarf2_mark (struct dwarf2_cu *); |
1845 | ||
1846 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1847 | ||
b64f50a1 | 1848 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1849 | struct dwarf2_per_cu_data *); |
673bfd45 | 1850 | |
f792889a | 1851 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1852 | |
9291a0cd TT |
1853 | static void dwarf2_release_queue (void *dummy); |
1854 | ||
95554aad TT |
1855 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1856 | enum language pretend_language); | |
1857 | ||
a0f42c21 | 1858 | static void process_queue (void); |
9291a0cd TT |
1859 | |
1860 | static void find_file_and_directory (struct die_info *die, | |
1861 | struct dwarf2_cu *cu, | |
15d034d0 | 1862 | const char **name, const char **comp_dir); |
9291a0cd TT |
1863 | |
1864 | static char *file_full_name (int file, struct line_header *lh, | |
1865 | const char *comp_dir); | |
1866 | ||
d521ce57 | 1867 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1868 | (struct comp_unit_head *header, |
1869 | struct dwarf2_section_info *section, | |
d521ce57 | 1870 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1871 | int is_debug_types_section); |
1872 | ||
fd820528 | 1873 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1874 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1875 | int use_existing_cu, int keep, | |
3019eac3 DE |
1876 | die_reader_func_ftype *die_reader_func, void *data); |
1877 | ||
dee91e82 DE |
1878 | static void init_cutu_and_read_dies_simple |
1879 | (struct dwarf2_per_cu_data *this_cu, | |
1880 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1881 | |
673bfd45 | 1882 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1883 | |
3019eac3 DE |
1884 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1885 | ||
57d63ce2 DE |
1886 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1887 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1888 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1889 | |
1890 | static struct dwp_file *get_dwp_file (void); | |
1891 | ||
3019eac3 | 1892 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1893 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1894 | |
1895 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1896 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1897 | |
89e63ee4 DE |
1898 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1899 | ||
3019eac3 DE |
1900 | static void free_dwo_file_cleanup (void *); |
1901 | ||
95554aad TT |
1902 | static void process_cu_includes (void); |
1903 | ||
1b80a9fa | 1904 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1905 | |
1906 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1907 | \f |
1908 | /* Various complaints about symbol reading that don't abort the process. */ | |
1909 | ||
1910 | static void | |
1911 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1912 | { | |
1913 | complaint (&symfile_complaints, | |
1914 | _("statement list doesn't fit in .debug_line section")); | |
1915 | } | |
1916 | ||
1917 | static void | |
1918 | dwarf2_debug_line_missing_file_complaint (void) | |
1919 | { | |
1920 | complaint (&symfile_complaints, | |
1921 | _(".debug_line section has line data without a file")); | |
1922 | } | |
1923 | ||
1924 | static void | |
1925 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1926 | { | |
1927 | complaint (&symfile_complaints, | |
1928 | _(".debug_line section has line " | |
1929 | "program sequence without an end")); | |
1930 | } | |
1931 | ||
1932 | static void | |
1933 | dwarf2_complex_location_expr_complaint (void) | |
1934 | { | |
1935 | complaint (&symfile_complaints, _("location expression too complex")); | |
1936 | } | |
1937 | ||
1938 | static void | |
1939 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1940 | int arg3) | |
1941 | { | |
1942 | complaint (&symfile_complaints, | |
1943 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1944 | arg1, arg2, arg3); | |
1945 | } | |
1946 | ||
1947 | static void | |
1948 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1949 | { | |
1950 | complaint (&symfile_complaints, | |
1951 | _("debug info runs off end of %s section" | |
1952 | " [in module %s]"), | |
a32a8923 DE |
1953 | get_section_name (section), |
1954 | get_section_file_name (section)); | |
4390d890 | 1955 | } |
1b80a9fa | 1956 | |
4390d890 DE |
1957 | static void |
1958 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1959 | { | |
1960 | complaint (&symfile_complaints, | |
1961 | _("macro debug info contains a " | |
1962 | "malformed macro definition:\n`%s'"), | |
1963 | arg1); | |
1964 | } | |
1965 | ||
1966 | static void | |
1967 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1968 | { | |
1969 | complaint (&symfile_complaints, | |
1970 | _("invalid attribute class or form for '%s' in '%s'"), | |
1971 | arg1, arg2); | |
1972 | } | |
527f3840 JK |
1973 | |
1974 | /* Hash function for line_header_hash. */ | |
1975 | ||
1976 | static hashval_t | |
1977 | line_header_hash (const struct line_header *ofs) | |
1978 | { | |
1979 | return ofs->offset.sect_off ^ ofs->offset_in_dwz; | |
1980 | } | |
1981 | ||
1982 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1983 | ||
1984 | static hashval_t | |
1985 | line_header_hash_voidp (const void *item) | |
1986 | { | |
9a3c8263 | 1987 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1988 | |
1989 | return line_header_hash (ofs); | |
1990 | } | |
1991 | ||
1992 | /* Equality function for line_header_hash. */ | |
1993 | ||
1994 | static int | |
1995 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1996 | { | |
9a3c8263 SM |
1997 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1998 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 JK |
1999 | |
2000 | return (ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off | |
2001 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); | |
2002 | } | |
2003 | ||
4390d890 | 2004 | \f |
9291a0cd TT |
2005 | #if WORDS_BIGENDIAN |
2006 | ||
2007 | /* Convert VALUE between big- and little-endian. */ | |
2008 | static offset_type | |
2009 | byte_swap (offset_type value) | |
2010 | { | |
2011 | offset_type result; | |
2012 | ||
2013 | result = (value & 0xff) << 24; | |
2014 | result |= (value & 0xff00) << 8; | |
2015 | result |= (value & 0xff0000) >> 8; | |
2016 | result |= (value & 0xff000000) >> 24; | |
2017 | return result; | |
2018 | } | |
2019 | ||
2020 | #define MAYBE_SWAP(V) byte_swap (V) | |
2021 | ||
2022 | #else | |
2023 | #define MAYBE_SWAP(V) (V) | |
2024 | #endif /* WORDS_BIGENDIAN */ | |
2025 | ||
31aa7e4e JB |
2026 | /* Read the given attribute value as an address, taking the attribute's |
2027 | form into account. */ | |
2028 | ||
2029 | static CORE_ADDR | |
2030 | attr_value_as_address (struct attribute *attr) | |
2031 | { | |
2032 | CORE_ADDR addr; | |
2033 | ||
2034 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2035 | { | |
2036 | /* Aside from a few clearly defined exceptions, attributes that | |
2037 | contain an address must always be in DW_FORM_addr form. | |
2038 | Unfortunately, some compilers happen to be violating this | |
2039 | requirement by encoding addresses using other forms, such | |
2040 | as DW_FORM_data4 for example. For those broken compilers, | |
2041 | we try to do our best, without any guarantee of success, | |
2042 | to interpret the address correctly. It would also be nice | |
2043 | to generate a complaint, but that would require us to maintain | |
2044 | a list of legitimate cases where a non-address form is allowed, | |
2045 | as well as update callers to pass in at least the CU's DWARF | |
2046 | version. This is more overhead than what we're willing to | |
2047 | expand for a pretty rare case. */ | |
2048 | addr = DW_UNSND (attr); | |
2049 | } | |
2050 | else | |
2051 | addr = DW_ADDR (attr); | |
2052 | ||
2053 | return addr; | |
2054 | } | |
2055 | ||
9291a0cd TT |
2056 | /* The suffix for an index file. */ |
2057 | #define INDEX_SUFFIX ".gdb-index" | |
2058 | ||
c906108c | 2059 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2060 | information and return true if we have enough to do something. |
2061 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2062 | ELF names are used. */ | |
c906108c SS |
2063 | |
2064 | int | |
251d32d9 TG |
2065 | dwarf2_has_info (struct objfile *objfile, |
2066 | const struct dwarf2_debug_sections *names) | |
c906108c | 2067 | { |
9a3c8263 SM |
2068 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2069 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2070 | if (!dwarf2_per_objfile) |
2071 | { | |
2072 | /* Initialize per-objfile state. */ | |
2073 | struct dwarf2_per_objfile *data | |
8d749320 | 2074 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2075 | |
be391dca TT |
2076 | memset (data, 0, sizeof (*data)); |
2077 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
2078 | dwarf2_per_objfile = data; | |
6502dd73 | 2079 | |
251d32d9 TG |
2080 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
2081 | (void *) names); | |
be391dca TT |
2082 | dwarf2_per_objfile->objfile = objfile; |
2083 | } | |
73869dc2 | 2084 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2085 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2086 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2087 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2088 | } |
2089 | ||
2090 | /* Return the containing section of virtual section SECTION. */ | |
2091 | ||
2092 | static struct dwarf2_section_info * | |
2093 | get_containing_section (const struct dwarf2_section_info *section) | |
2094 | { | |
2095 | gdb_assert (section->is_virtual); | |
2096 | return section->s.containing_section; | |
c906108c SS |
2097 | } |
2098 | ||
a32a8923 DE |
2099 | /* Return the bfd owner of SECTION. */ |
2100 | ||
2101 | static struct bfd * | |
2102 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2103 | { | |
73869dc2 DE |
2104 | if (section->is_virtual) |
2105 | { | |
2106 | section = get_containing_section (section); | |
2107 | gdb_assert (!section->is_virtual); | |
2108 | } | |
049412e3 | 2109 | return section->s.section->owner; |
a32a8923 DE |
2110 | } |
2111 | ||
2112 | /* Return the bfd section of SECTION. | |
2113 | Returns NULL if the section is not present. */ | |
2114 | ||
2115 | static asection * | |
2116 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2117 | { | |
73869dc2 DE |
2118 | if (section->is_virtual) |
2119 | { | |
2120 | section = get_containing_section (section); | |
2121 | gdb_assert (!section->is_virtual); | |
2122 | } | |
049412e3 | 2123 | return section->s.section; |
a32a8923 DE |
2124 | } |
2125 | ||
2126 | /* Return the name of SECTION. */ | |
2127 | ||
2128 | static const char * | |
2129 | get_section_name (const struct dwarf2_section_info *section) | |
2130 | { | |
2131 | asection *sectp = get_section_bfd_section (section); | |
2132 | ||
2133 | gdb_assert (sectp != NULL); | |
2134 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2135 | } | |
2136 | ||
2137 | /* Return the name of the file SECTION is in. */ | |
2138 | ||
2139 | static const char * | |
2140 | get_section_file_name (const struct dwarf2_section_info *section) | |
2141 | { | |
2142 | bfd *abfd = get_section_bfd_owner (section); | |
2143 | ||
2144 | return bfd_get_filename (abfd); | |
2145 | } | |
2146 | ||
2147 | /* Return the id of SECTION. | |
2148 | Returns 0 if SECTION doesn't exist. */ | |
2149 | ||
2150 | static int | |
2151 | get_section_id (const struct dwarf2_section_info *section) | |
2152 | { | |
2153 | asection *sectp = get_section_bfd_section (section); | |
2154 | ||
2155 | if (sectp == NULL) | |
2156 | return 0; | |
2157 | return sectp->id; | |
2158 | } | |
2159 | ||
2160 | /* Return the flags of SECTION. | |
73869dc2 | 2161 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2162 | |
2163 | static int | |
2164 | get_section_flags (const struct dwarf2_section_info *section) | |
2165 | { | |
2166 | asection *sectp = get_section_bfd_section (section); | |
2167 | ||
2168 | gdb_assert (sectp != NULL); | |
2169 | return bfd_get_section_flags (sectp->owner, sectp); | |
2170 | } | |
2171 | ||
251d32d9 TG |
2172 | /* When loading sections, we look either for uncompressed section or for |
2173 | compressed section names. */ | |
233a11ab CS |
2174 | |
2175 | static int | |
251d32d9 TG |
2176 | section_is_p (const char *section_name, |
2177 | const struct dwarf2_section_names *names) | |
233a11ab | 2178 | { |
251d32d9 TG |
2179 | if (names->normal != NULL |
2180 | && strcmp (section_name, names->normal) == 0) | |
2181 | return 1; | |
2182 | if (names->compressed != NULL | |
2183 | && strcmp (section_name, names->compressed) == 0) | |
2184 | return 1; | |
2185 | return 0; | |
233a11ab CS |
2186 | } |
2187 | ||
c906108c SS |
2188 | /* This function is mapped across the sections and remembers the |
2189 | offset and size of each of the debugging sections we are interested | |
2190 | in. */ | |
2191 | ||
2192 | static void | |
251d32d9 | 2193 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 2194 | { |
251d32d9 | 2195 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 2196 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
2197 | |
2198 | if (vnames == NULL) | |
2199 | names = &dwarf2_elf_names; | |
2200 | else | |
2201 | names = (const struct dwarf2_debug_sections *) vnames; | |
2202 | ||
dc7650b8 JK |
2203 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2204 | { | |
2205 | } | |
2206 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 2207 | { |
049412e3 | 2208 | dwarf2_per_objfile->info.s.section = sectp; |
dce234bc | 2209 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); |
c906108c | 2210 | } |
251d32d9 | 2211 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 2212 | { |
049412e3 | 2213 | dwarf2_per_objfile->abbrev.s.section = sectp; |
dce234bc | 2214 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); |
c906108c | 2215 | } |
251d32d9 | 2216 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 2217 | { |
049412e3 | 2218 | dwarf2_per_objfile->line.s.section = sectp; |
dce234bc | 2219 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); |
c906108c | 2220 | } |
251d32d9 | 2221 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 2222 | { |
049412e3 | 2223 | dwarf2_per_objfile->loc.s.section = sectp; |
dce234bc | 2224 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); |
c906108c | 2225 | } |
251d32d9 | 2226 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 2227 | { |
049412e3 | 2228 | dwarf2_per_objfile->macinfo.s.section = sectp; |
dce234bc | 2229 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); |
c906108c | 2230 | } |
cf2c3c16 TT |
2231 | else if (section_is_p (sectp->name, &names->macro)) |
2232 | { | |
049412e3 | 2233 | dwarf2_per_objfile->macro.s.section = sectp; |
cf2c3c16 TT |
2234 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); |
2235 | } | |
251d32d9 | 2236 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 2237 | { |
049412e3 | 2238 | dwarf2_per_objfile->str.s.section = sectp; |
dce234bc | 2239 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); |
c906108c | 2240 | } |
3019eac3 DE |
2241 | else if (section_is_p (sectp->name, &names->addr)) |
2242 | { | |
049412e3 | 2243 | dwarf2_per_objfile->addr.s.section = sectp; |
3019eac3 DE |
2244 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); |
2245 | } | |
251d32d9 | 2246 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 2247 | { |
049412e3 | 2248 | dwarf2_per_objfile->frame.s.section = sectp; |
dce234bc | 2249 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2250 | } |
251d32d9 | 2251 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 2252 | { |
049412e3 | 2253 | dwarf2_per_objfile->eh_frame.s.section = sectp; |
dc7650b8 | 2254 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2255 | } |
251d32d9 | 2256 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2257 | { |
049412e3 | 2258 | dwarf2_per_objfile->ranges.s.section = sectp; |
dce234bc | 2259 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); |
af34e669 | 2260 | } |
251d32d9 | 2261 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2262 | { |
8b70b953 TT |
2263 | struct dwarf2_section_info type_section; |
2264 | ||
2265 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2266 | type_section.s.section = sectp; |
8b70b953 TT |
2267 | type_section.size = bfd_get_section_size (sectp); |
2268 | ||
2269 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2270 | &type_section); | |
348e048f | 2271 | } |
251d32d9 | 2272 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd | 2273 | { |
049412e3 | 2274 | dwarf2_per_objfile->gdb_index.s.section = sectp; |
9291a0cd TT |
2275 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); |
2276 | } | |
dce234bc | 2277 | |
b4e1fd61 | 2278 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 FR |
2279 | && bfd_section_vma (abfd, sectp) == 0) |
2280 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2281 | } |
2282 | ||
fceca515 DE |
2283 | /* A helper function that decides whether a section is empty, |
2284 | or not present. */ | |
9e0ac564 TT |
2285 | |
2286 | static int | |
19ac8c2e | 2287 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2288 | { |
73869dc2 DE |
2289 | if (section->is_virtual) |
2290 | return section->size == 0; | |
049412e3 | 2291 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2292 | } |
2293 | ||
3019eac3 DE |
2294 | /* Read the contents of the section INFO. |
2295 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2296 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2297 | of the DWO file. | |
dce234bc | 2298 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2299 | |
dce234bc PP |
2300 | static void |
2301 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2302 | { |
a32a8923 | 2303 | asection *sectp; |
3019eac3 | 2304 | bfd *abfd; |
dce234bc | 2305 | gdb_byte *buf, *retbuf; |
c906108c | 2306 | |
be391dca TT |
2307 | if (info->readin) |
2308 | return; | |
dce234bc | 2309 | info->buffer = NULL; |
be391dca | 2310 | info->readin = 1; |
188dd5d6 | 2311 | |
9e0ac564 | 2312 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2313 | return; |
c906108c | 2314 | |
a32a8923 | 2315 | sectp = get_section_bfd_section (info); |
3019eac3 | 2316 | |
73869dc2 DE |
2317 | /* If this is a virtual section we need to read in the real one first. */ |
2318 | if (info->is_virtual) | |
2319 | { | |
2320 | struct dwarf2_section_info *containing_section = | |
2321 | get_containing_section (info); | |
2322 | ||
2323 | gdb_assert (sectp != NULL); | |
2324 | if ((sectp->flags & SEC_RELOC) != 0) | |
2325 | { | |
2326 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2327 | " supported in section %s [in module %s]"), | |
2328 | get_section_name (info), get_section_file_name (info)); | |
2329 | } | |
2330 | dwarf2_read_section (objfile, containing_section); | |
2331 | /* Other code should have already caught virtual sections that don't | |
2332 | fit. */ | |
2333 | gdb_assert (info->virtual_offset + info->size | |
2334 | <= containing_section->size); | |
2335 | /* If the real section is empty or there was a problem reading the | |
2336 | section we shouldn't get here. */ | |
2337 | gdb_assert (containing_section->buffer != NULL); | |
2338 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2339 | return; | |
2340 | } | |
2341 | ||
4bf44c1c TT |
2342 | /* If the section has relocations, we must read it ourselves. |
2343 | Otherwise we attach it to the BFD. */ | |
2344 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2345 | { |
d521ce57 | 2346 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2347 | return; |
dce234bc | 2348 | } |
dce234bc | 2349 | |
224c3ddb | 2350 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2351 | info->buffer = buf; |
dce234bc PP |
2352 | |
2353 | /* When debugging .o files, we may need to apply relocations; see | |
2354 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2355 | We never compress sections in .o files, so we only need to | |
2356 | try this when the section is not compressed. */ | |
ac8035ab | 2357 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2358 | if (retbuf != NULL) |
2359 | { | |
2360 | info->buffer = retbuf; | |
2361 | return; | |
2362 | } | |
2363 | ||
a32a8923 DE |
2364 | abfd = get_section_bfd_owner (info); |
2365 | gdb_assert (abfd != NULL); | |
2366 | ||
dce234bc PP |
2367 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2368 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2369 | { |
2370 | error (_("Dwarf Error: Can't read DWARF data" | |
2371 | " in section %s [in module %s]"), | |
2372 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2373 | } | |
dce234bc PP |
2374 | } |
2375 | ||
9e0ac564 TT |
2376 | /* A helper function that returns the size of a section in a safe way. |
2377 | If you are positive that the section has been read before using the | |
2378 | size, then it is safe to refer to the dwarf2_section_info object's | |
2379 | "size" field directly. In other cases, you must call this | |
2380 | function, because for compressed sections the size field is not set | |
2381 | correctly until the section has been read. */ | |
2382 | ||
2383 | static bfd_size_type | |
2384 | dwarf2_section_size (struct objfile *objfile, | |
2385 | struct dwarf2_section_info *info) | |
2386 | { | |
2387 | if (!info->readin) | |
2388 | dwarf2_read_section (objfile, info); | |
2389 | return info->size; | |
2390 | } | |
2391 | ||
dce234bc | 2392 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2393 | SECTION_NAME. */ |
af34e669 | 2394 | |
dce234bc | 2395 | void |
3017a003 TG |
2396 | dwarf2_get_section_info (struct objfile *objfile, |
2397 | enum dwarf2_section_enum sect, | |
d521ce57 | 2398 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2399 | bfd_size_type *sizep) |
2400 | { | |
2401 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2402 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2403 | dwarf2_objfile_data_key); | |
dce234bc | 2404 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2405 | |
2406 | /* We may see an objfile without any DWARF, in which case we just | |
2407 | return nothing. */ | |
2408 | if (data == NULL) | |
2409 | { | |
2410 | *sectp = NULL; | |
2411 | *bufp = NULL; | |
2412 | *sizep = 0; | |
2413 | return; | |
2414 | } | |
3017a003 TG |
2415 | switch (sect) |
2416 | { | |
2417 | case DWARF2_DEBUG_FRAME: | |
2418 | info = &data->frame; | |
2419 | break; | |
2420 | case DWARF2_EH_FRAME: | |
2421 | info = &data->eh_frame; | |
2422 | break; | |
2423 | default: | |
2424 | gdb_assert_not_reached ("unexpected section"); | |
2425 | } | |
dce234bc | 2426 | |
9e0ac564 | 2427 | dwarf2_read_section (objfile, info); |
dce234bc | 2428 | |
a32a8923 | 2429 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2430 | *bufp = info->buffer; |
2431 | *sizep = info->size; | |
2432 | } | |
2433 | ||
36586728 TT |
2434 | /* A helper function to find the sections for a .dwz file. */ |
2435 | ||
2436 | static void | |
2437 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2438 | { | |
9a3c8263 | 2439 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2440 | |
2441 | /* Note that we only support the standard ELF names, because .dwz | |
2442 | is ELF-only (at the time of writing). */ | |
2443 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2444 | { | |
049412e3 | 2445 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2446 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2447 | } | |
2448 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2449 | { | |
049412e3 | 2450 | dwz_file->info.s.section = sectp; |
36586728 TT |
2451 | dwz_file->info.size = bfd_get_section_size (sectp); |
2452 | } | |
2453 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2454 | { | |
049412e3 | 2455 | dwz_file->str.s.section = sectp; |
36586728 TT |
2456 | dwz_file->str.size = bfd_get_section_size (sectp); |
2457 | } | |
2458 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2459 | { | |
049412e3 | 2460 | dwz_file->line.s.section = sectp; |
36586728 TT |
2461 | dwz_file->line.size = bfd_get_section_size (sectp); |
2462 | } | |
2463 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2464 | { | |
049412e3 | 2465 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2466 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2467 | } | |
2ec9a5e0 TT |
2468 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2469 | { | |
049412e3 | 2470 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2471 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2472 | } | |
36586728 TT |
2473 | } |
2474 | ||
4db1a1dc TT |
2475 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2476 | there is no .gnu_debugaltlink section in the file. Error if there | |
2477 | is such a section but the file cannot be found. */ | |
36586728 TT |
2478 | |
2479 | static struct dwz_file * | |
2480 | dwarf2_get_dwz_file (void) | |
2481 | { | |
4db1a1dc TT |
2482 | bfd *dwz_bfd; |
2483 | char *data; | |
36586728 TT |
2484 | struct cleanup *cleanup; |
2485 | const char *filename; | |
2486 | struct dwz_file *result; | |
acd13123 | 2487 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2488 | size_t buildid_len; |
2489 | bfd_byte *buildid; | |
36586728 TT |
2490 | |
2491 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2492 | return dwarf2_per_objfile->dwz_file; | |
2493 | ||
4db1a1dc TT |
2494 | bfd_set_error (bfd_error_no_error); |
2495 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2496 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2497 | if (data == NULL) |
2498 | { | |
2499 | if (bfd_get_error () == bfd_error_no_error) | |
2500 | return NULL; | |
2501 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2502 | bfd_errmsg (bfd_get_error ())); | |
2503 | } | |
36586728 | 2504 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2505 | make_cleanup (xfree, buildid); |
36586728 | 2506 | |
acd13123 TT |
2507 | buildid_len = (size_t) buildid_len_arg; |
2508 | ||
f9d83a0b | 2509 | filename = (const char *) data; |
36586728 TT |
2510 | if (!IS_ABSOLUTE_PATH (filename)) |
2511 | { | |
4262abfb | 2512 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2513 | char *rel; |
2514 | ||
2515 | make_cleanup (xfree, abs); | |
2516 | abs = ldirname (abs); | |
2517 | make_cleanup (xfree, abs); | |
2518 | ||
2519 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2520 | make_cleanup (xfree, rel); | |
2521 | filename = rel; | |
2522 | } | |
2523 | ||
dc294be5 TT |
2524 | /* First try the file name given in the section. If that doesn't |
2525 | work, try to use the build-id instead. */ | |
36586728 | 2526 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); |
dc294be5 | 2527 | if (dwz_bfd != NULL) |
36586728 | 2528 | { |
dc294be5 TT |
2529 | if (!build_id_verify (dwz_bfd, buildid_len, buildid)) |
2530 | { | |
2531 | gdb_bfd_unref (dwz_bfd); | |
2532 | dwz_bfd = NULL; | |
2533 | } | |
36586728 TT |
2534 | } |
2535 | ||
dc294be5 TT |
2536 | if (dwz_bfd == NULL) |
2537 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2538 | ||
2539 | if (dwz_bfd == NULL) | |
2540 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2541 | objfile_name (dwarf2_per_objfile->objfile)); | |
2542 | ||
36586728 TT |
2543 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2544 | struct dwz_file); | |
2545 | result->dwz_bfd = dwz_bfd; | |
2546 | ||
2547 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2548 | ||
2549 | do_cleanups (cleanup); | |
2550 | ||
13aaf454 | 2551 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd); |
8d2cc612 | 2552 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2553 | return result; |
2554 | } | |
9291a0cd | 2555 | \f |
7b9f3c50 DE |
2556 | /* DWARF quick_symbols_functions support. */ |
2557 | ||
2558 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2559 | unique line tables, so we maintain a separate table of all .debug_line | |
2560 | derived entries to support the sharing. | |
2561 | All the quick functions need is the list of file names. We discard the | |
2562 | line_header when we're done and don't need to record it here. */ | |
2563 | struct quick_file_names | |
2564 | { | |
094b34ac DE |
2565 | /* The data used to construct the hash key. */ |
2566 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2567 | |
2568 | /* The number of entries in file_names, real_names. */ | |
2569 | unsigned int num_file_names; | |
2570 | ||
2571 | /* The file names from the line table, after being run through | |
2572 | file_full_name. */ | |
2573 | const char **file_names; | |
2574 | ||
2575 | /* The file names from the line table after being run through | |
2576 | gdb_realpath. These are computed lazily. */ | |
2577 | const char **real_names; | |
2578 | }; | |
2579 | ||
2580 | /* When using the index (and thus not using psymtabs), each CU has an | |
2581 | object of this type. This is used to hold information needed by | |
2582 | the various "quick" methods. */ | |
2583 | struct dwarf2_per_cu_quick_data | |
2584 | { | |
2585 | /* The file table. This can be NULL if there was no file table | |
2586 | or it's currently not read in. | |
2587 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2588 | struct quick_file_names *file_names; | |
2589 | ||
2590 | /* The corresponding symbol table. This is NULL if symbols for this | |
2591 | CU have not yet been read. */ | |
43f3e411 | 2592 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2593 | |
2594 | /* A temporary mark bit used when iterating over all CUs in | |
2595 | expand_symtabs_matching. */ | |
2596 | unsigned int mark : 1; | |
2597 | ||
2598 | /* True if we've tried to read the file table and found there isn't one. | |
2599 | There will be no point in trying to read it again next time. */ | |
2600 | unsigned int no_file_data : 1; | |
2601 | }; | |
2602 | ||
094b34ac DE |
2603 | /* Utility hash function for a stmt_list_hash. */ |
2604 | ||
2605 | static hashval_t | |
2606 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2607 | { | |
2608 | hashval_t v = 0; | |
2609 | ||
2610 | if (stmt_list_hash->dwo_unit != NULL) | |
2611 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2612 | v += stmt_list_hash->line_offset.sect_off; | |
2613 | return v; | |
2614 | } | |
2615 | ||
2616 | /* Utility equality function for a stmt_list_hash. */ | |
2617 | ||
2618 | static int | |
2619 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2620 | const struct stmt_list_hash *rhs) | |
2621 | { | |
2622 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2623 | return 0; | |
2624 | if (lhs->dwo_unit != NULL | |
2625 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2626 | return 0; | |
2627 | ||
2628 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2629 | } | |
2630 | ||
7b9f3c50 DE |
2631 | /* Hash function for a quick_file_names. */ |
2632 | ||
2633 | static hashval_t | |
2634 | hash_file_name_entry (const void *e) | |
2635 | { | |
9a3c8263 SM |
2636 | const struct quick_file_names *file_data |
2637 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2638 | |
094b34ac | 2639 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2640 | } |
2641 | ||
2642 | /* Equality function for a quick_file_names. */ | |
2643 | ||
2644 | static int | |
2645 | eq_file_name_entry (const void *a, const void *b) | |
2646 | { | |
9a3c8263 SM |
2647 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2648 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2649 | |
094b34ac | 2650 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2651 | } |
2652 | ||
2653 | /* Delete function for a quick_file_names. */ | |
2654 | ||
2655 | static void | |
2656 | delete_file_name_entry (void *e) | |
2657 | { | |
9a3c8263 | 2658 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2659 | int i; |
2660 | ||
2661 | for (i = 0; i < file_data->num_file_names; ++i) | |
2662 | { | |
2663 | xfree ((void*) file_data->file_names[i]); | |
2664 | if (file_data->real_names) | |
2665 | xfree ((void*) file_data->real_names[i]); | |
2666 | } | |
2667 | ||
2668 | /* The space for the struct itself lives on objfile_obstack, | |
2669 | so we don't free it here. */ | |
2670 | } | |
2671 | ||
2672 | /* Create a quick_file_names hash table. */ | |
2673 | ||
2674 | static htab_t | |
2675 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2676 | { | |
2677 | return htab_create_alloc (nr_initial_entries, | |
2678 | hash_file_name_entry, eq_file_name_entry, | |
2679 | delete_file_name_entry, xcalloc, xfree); | |
2680 | } | |
9291a0cd | 2681 | |
918dd910 JK |
2682 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2683 | have to be created afterwards. You should call age_cached_comp_units after | |
2684 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2685 | ||
2686 | static void | |
2687 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2688 | { | |
3019eac3 | 2689 | if (per_cu->is_debug_types) |
e5fe5e75 | 2690 | load_full_type_unit (per_cu); |
918dd910 | 2691 | else |
95554aad | 2692 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2693 | |
cc12ce38 DE |
2694 | if (per_cu->cu == NULL) |
2695 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2696 | |
2697 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2698 | } |
2699 | ||
a0f42c21 | 2700 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2701 | |
9291a0cd | 2702 | static void |
a0f42c21 | 2703 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2704 | { |
2705 | struct cleanup *back_to; | |
2706 | ||
f4dc4d17 DE |
2707 | /* Skip type_unit_groups, reading the type units they contain |
2708 | is handled elsewhere. */ | |
2709 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2710 | return; | |
2711 | ||
9291a0cd TT |
2712 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2713 | ||
95554aad | 2714 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2715 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2716 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2717 | { | |
2718 | queue_comp_unit (per_cu, language_minimal); | |
2719 | load_cu (per_cu); | |
89e63ee4 DE |
2720 | |
2721 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2722 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2723 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2724 | if (!per_cu->is_debug_types | |
cc12ce38 | 2725 | && per_cu->cu != NULL |
89e63ee4 DE |
2726 | && per_cu->cu->dwo_unit != NULL |
2727 | && dwarf2_per_objfile->index_table != NULL | |
2728 | && dwarf2_per_objfile->index_table->version <= 7 | |
2729 | /* DWP files aren't supported yet. */ | |
2730 | && get_dwp_file () == NULL) | |
2731 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2732 | } |
9291a0cd | 2733 | |
a0f42c21 | 2734 | process_queue (); |
9291a0cd TT |
2735 | |
2736 | /* Age the cache, releasing compilation units that have not | |
2737 | been used recently. */ | |
2738 | age_cached_comp_units (); | |
2739 | ||
2740 | do_cleanups (back_to); | |
2741 | } | |
2742 | ||
2743 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2744 | the objfile from which this CU came. Returns the resulting symbol | |
2745 | table. */ | |
2fdf6df6 | 2746 | |
43f3e411 | 2747 | static struct compunit_symtab * |
a0f42c21 | 2748 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2749 | { |
95554aad | 2750 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2751 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2752 | { |
2753 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2754 | increment_reading_symtab (); | |
a0f42c21 | 2755 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2756 | process_cu_includes (); |
9291a0cd TT |
2757 | do_cleanups (back_to); |
2758 | } | |
f194fefb | 2759 | |
43f3e411 | 2760 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2761 | } |
2762 | ||
8832e7e3 | 2763 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2764 | |
2765 | This is intended for loops like: | |
2766 | ||
2767 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2768 | + dwarf2_per_objfile->n_type_units); ++i) | |
2769 | { | |
8832e7e3 | 2770 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2771 | |
2772 | ...; | |
2773 | } | |
2774 | */ | |
2fdf6df6 | 2775 | |
1fd400ff | 2776 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2777 | dw2_get_cutu (int index) |
1fd400ff TT |
2778 | { |
2779 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2780 | { | |
f4dc4d17 | 2781 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2782 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2783 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2784 | } |
2785 | ||
2786 | return dwarf2_per_objfile->all_comp_units[index]; | |
2787 | } | |
2788 | ||
8832e7e3 DE |
2789 | /* Return the CU given its index. |
2790 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2791 | refers to a CU. */ | |
f4dc4d17 DE |
2792 | |
2793 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2794 | dw2_get_cu (int index) |
f4dc4d17 | 2795 | { |
8832e7e3 | 2796 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2797 | |
1fd400ff TT |
2798 | return dwarf2_per_objfile->all_comp_units[index]; |
2799 | } | |
2800 | ||
2ec9a5e0 TT |
2801 | /* A helper for create_cus_from_index that handles a given list of |
2802 | CUs. */ | |
2fdf6df6 | 2803 | |
74a0d9f6 | 2804 | static void |
2ec9a5e0 TT |
2805 | create_cus_from_index_list (struct objfile *objfile, |
2806 | const gdb_byte *cu_list, offset_type n_elements, | |
2807 | struct dwarf2_section_info *section, | |
2808 | int is_dwz, | |
2809 | int base_offset) | |
9291a0cd TT |
2810 | { |
2811 | offset_type i; | |
9291a0cd | 2812 | |
2ec9a5e0 | 2813 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2814 | { |
2815 | struct dwarf2_per_cu_data *the_cu; | |
2816 | ULONGEST offset, length; | |
2817 | ||
74a0d9f6 JK |
2818 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2819 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2820 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2821 | cu_list += 2 * 8; |
2822 | ||
2823 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2824 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2825 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2826 | the_cu->length = length; |
2827 | the_cu->objfile = objfile; | |
8a0459fd | 2828 | the_cu->section = section; |
9291a0cd TT |
2829 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2830 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2831 | the_cu->is_dwz = is_dwz; |
2832 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2833 | } |
9291a0cd TT |
2834 | } |
2835 | ||
2ec9a5e0 | 2836 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2837 | the CU objects for this objfile. */ |
2ec9a5e0 | 2838 | |
74a0d9f6 | 2839 | static void |
2ec9a5e0 TT |
2840 | create_cus_from_index (struct objfile *objfile, |
2841 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2842 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2843 | { | |
2844 | struct dwz_file *dwz; | |
2845 | ||
2846 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
2847 | dwarf2_per_objfile->all_comp_units = |
2848 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
2849 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 2850 | |
74a0d9f6 JK |
2851 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2852 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2853 | |
2854 | if (dwz_elements == 0) | |
74a0d9f6 | 2855 | return; |
2ec9a5e0 TT |
2856 | |
2857 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2858 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2859 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2860 | } |
2861 | ||
1fd400ff | 2862 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2863 | |
74a0d9f6 | 2864 | static void |
673bfd45 | 2865 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2866 | struct dwarf2_section_info *section, |
673bfd45 DE |
2867 | const gdb_byte *bytes, |
2868 | offset_type elements) | |
1fd400ff TT |
2869 | { |
2870 | offset_type i; | |
673bfd45 | 2871 | htab_t sig_types_hash; |
1fd400ff | 2872 | |
6aa5f3a6 DE |
2873 | dwarf2_per_objfile->n_type_units |
2874 | = dwarf2_per_objfile->n_allocated_type_units | |
2875 | = elements / 3; | |
8d749320 SM |
2876 | dwarf2_per_objfile->all_type_units = |
2877 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 2878 | |
673bfd45 | 2879 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2880 | |
2881 | for (i = 0; i < elements; i += 3) | |
2882 | { | |
52dc124a DE |
2883 | struct signatured_type *sig_type; |
2884 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2885 | void **slot; |
2886 | ||
74a0d9f6 JK |
2887 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2888 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2889 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2890 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2891 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2892 | bytes += 3 * 8; | |
2893 | ||
52dc124a | 2894 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2895 | struct signatured_type); |
52dc124a | 2896 | sig_type->signature = signature; |
3019eac3 DE |
2897 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2898 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2899 | sig_type->per_cu.section = section; |
52dc124a DE |
2900 | sig_type->per_cu.offset.sect_off = offset; |
2901 | sig_type->per_cu.objfile = objfile; | |
2902 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2903 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2904 | struct dwarf2_per_cu_quick_data); | |
2905 | ||
52dc124a DE |
2906 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2907 | *slot = sig_type; | |
1fd400ff | 2908 | |
b4dd5633 | 2909 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2910 | } |
2911 | ||
673bfd45 | 2912 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2913 | } |
2914 | ||
9291a0cd TT |
2915 | /* Read the address map data from the mapped index, and use it to |
2916 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2917 | |
9291a0cd TT |
2918 | static void |
2919 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2920 | { | |
3e29f34a | 2921 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd TT |
2922 | const gdb_byte *iter, *end; |
2923 | struct obstack temp_obstack; | |
2924 | struct addrmap *mutable_map; | |
2925 | struct cleanup *cleanup; | |
2926 | CORE_ADDR baseaddr; | |
2927 | ||
2928 | obstack_init (&temp_obstack); | |
2929 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2930 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2931 | ||
2932 | iter = index->address_table; | |
2933 | end = iter + index->address_table_size; | |
2934 | ||
2935 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2936 | ||
2937 | while (iter < end) | |
2938 | { | |
2939 | ULONGEST hi, lo, cu_index; | |
2940 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2941 | iter += 8; | |
2942 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2943 | iter += 8; | |
2944 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2945 | iter += 4; | |
f652bce2 | 2946 | |
24a55014 | 2947 | if (lo > hi) |
f652bce2 | 2948 | { |
24a55014 DE |
2949 | complaint (&symfile_complaints, |
2950 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2951 | hex_string (lo), hex_string (hi)); |
24a55014 | 2952 | continue; |
f652bce2 | 2953 | } |
24a55014 DE |
2954 | |
2955 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2956 | { |
2957 | complaint (&symfile_complaints, | |
2958 | _(".gdb_index address table has invalid CU number %u"), | |
2959 | (unsigned) cu_index); | |
24a55014 | 2960 | continue; |
f652bce2 | 2961 | } |
24a55014 | 2962 | |
3e29f34a MR |
2963 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
2964 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
2965 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
2966 | } |
2967 | ||
2968 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2969 | &objfile->objfile_obstack); | |
2970 | do_cleanups (cleanup); | |
2971 | } | |
2972 | ||
59d7bcaf JK |
2973 | /* The hash function for strings in the mapped index. This is the same as |
2974 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2975 | implementation. This is necessary because the hash function is tied to the | |
2976 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2977 | SYMBOL_HASH_NEXT. |
2978 | ||
2979 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2980 | |
9291a0cd | 2981 | static hashval_t |
559a7a62 | 2982 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2983 | { |
2984 | const unsigned char *str = (const unsigned char *) p; | |
2985 | hashval_t r = 0; | |
2986 | unsigned char c; | |
2987 | ||
2988 | while ((c = *str++) != 0) | |
559a7a62 JK |
2989 | { |
2990 | if (index_version >= 5) | |
2991 | c = tolower (c); | |
2992 | r = r * 67 + c - 113; | |
2993 | } | |
9291a0cd TT |
2994 | |
2995 | return r; | |
2996 | } | |
2997 | ||
2998 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2999 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
3000 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 3001 | |
9291a0cd TT |
3002 | static int |
3003 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
3004 | offset_type **vec_out) | |
3005 | { | |
0cf03b49 JK |
3006 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
3007 | offset_type hash; | |
9291a0cd | 3008 | offset_type slot, step; |
559a7a62 | 3009 | int (*cmp) (const char *, const char *); |
9291a0cd | 3010 | |
0cf03b49 | 3011 | if (current_language->la_language == language_cplus |
45280282 IB |
3012 | || current_language->la_language == language_fortran |
3013 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3014 | { |
3015 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3016 | not contain any. */ | |
a8719064 | 3017 | |
72998fb3 | 3018 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3019 | { |
72998fb3 | 3020 | char *without_params = cp_remove_params (name); |
0cf03b49 | 3021 | |
72998fb3 DE |
3022 | if (without_params != NULL) |
3023 | { | |
3024 | make_cleanup (xfree, without_params); | |
3025 | name = without_params; | |
3026 | } | |
0cf03b49 JK |
3027 | } |
3028 | } | |
3029 | ||
559a7a62 | 3030 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3031 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3032 | simulate our NAME being searched is also lowercased. */ |
3033 | hash = mapped_index_string_hash ((index->version == 4 | |
3034 | && case_sensitivity == case_sensitive_off | |
3035 | ? 5 : index->version), | |
3036 | name); | |
3037 | ||
3876f04e DE |
3038 | slot = hash & (index->symbol_table_slots - 1); |
3039 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3040 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3041 | |
3042 | for (;;) | |
3043 | { | |
3044 | /* Convert a slot number to an offset into the table. */ | |
3045 | offset_type i = 2 * slot; | |
3046 | const char *str; | |
3876f04e | 3047 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
3048 | { |
3049 | do_cleanups (back_to); | |
3050 | return 0; | |
3051 | } | |
9291a0cd | 3052 | |
3876f04e | 3053 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3054 | if (!cmp (name, str)) |
9291a0cd TT |
3055 | { |
3056 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3057 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 3058 | do_cleanups (back_to); |
9291a0cd TT |
3059 | return 1; |
3060 | } | |
3061 | ||
3876f04e | 3062 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3063 | } |
3064 | } | |
3065 | ||
2ec9a5e0 TT |
3066 | /* A helper function that reads the .gdb_index from SECTION and fills |
3067 | in MAP. FILENAME is the name of the file containing the section; | |
3068 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3069 | ok to use deprecated sections. | |
3070 | ||
3071 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3072 | out parameters that are filled in with information about the CU and | |
3073 | TU lists in the section. | |
3074 | ||
3075 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3076 | |
9291a0cd | 3077 | static int |
2ec9a5e0 TT |
3078 | read_index_from_section (struct objfile *objfile, |
3079 | const char *filename, | |
3080 | int deprecated_ok, | |
3081 | struct dwarf2_section_info *section, | |
3082 | struct mapped_index *map, | |
3083 | const gdb_byte **cu_list, | |
3084 | offset_type *cu_list_elements, | |
3085 | const gdb_byte **types_list, | |
3086 | offset_type *types_list_elements) | |
9291a0cd | 3087 | { |
948f8e3d | 3088 | const gdb_byte *addr; |
2ec9a5e0 | 3089 | offset_type version; |
b3b272e1 | 3090 | offset_type *metadata; |
1fd400ff | 3091 | int i; |
9291a0cd | 3092 | |
2ec9a5e0 | 3093 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3094 | return 0; |
82430852 JK |
3095 | |
3096 | /* Older elfutils strip versions could keep the section in the main | |
3097 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3098 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3099 | return 0; |
3100 | ||
2ec9a5e0 | 3101 | dwarf2_read_section (objfile, section); |
9291a0cd | 3102 | |
2ec9a5e0 | 3103 | addr = section->buffer; |
9291a0cd | 3104 | /* Version check. */ |
1fd400ff | 3105 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3106 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3107 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3108 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3109 | indices. */ |
831adc1f | 3110 | if (version < 4) |
481860b3 GB |
3111 | { |
3112 | static int warning_printed = 0; | |
3113 | if (!warning_printed) | |
3114 | { | |
3115 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3116 | filename); |
481860b3 GB |
3117 | warning_printed = 1; |
3118 | } | |
3119 | return 0; | |
3120 | } | |
3121 | /* Index version 4 uses a different hash function than index version | |
3122 | 5 and later. | |
3123 | ||
3124 | Versions earlier than 6 did not emit psymbols for inlined | |
3125 | functions. Using these files will cause GDB not to be able to | |
3126 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3127 | indices unless the user has done |
3128 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3129 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3130 | { |
3131 | static int warning_printed = 0; | |
3132 | if (!warning_printed) | |
3133 | { | |
e615022a DE |
3134 | warning (_("\ |
3135 | Skipping deprecated .gdb_index section in %s.\n\ | |
3136 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3137 | to use the section anyway."), | |
2ec9a5e0 | 3138 | filename); |
481860b3 GB |
3139 | warning_printed = 1; |
3140 | } | |
3141 | return 0; | |
3142 | } | |
796a7ff8 | 3143 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3144 | of the TU (for symbols coming from TUs), |
3145 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3146 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3147 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3148 | These are just performance bugs, and we can't distinguish gdb-generated | |
3149 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3150 | |
481860b3 | 3151 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3152 | longer backward compatible. */ |
796a7ff8 | 3153 | if (version > 8) |
594e8718 | 3154 | return 0; |
9291a0cd | 3155 | |
559a7a62 | 3156 | map->version = version; |
2ec9a5e0 | 3157 | map->total_size = section->size; |
9291a0cd TT |
3158 | |
3159 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3160 | |
3161 | i = 0; | |
2ec9a5e0 TT |
3162 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3163 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3164 | / 8); | |
1fd400ff TT |
3165 | ++i; |
3166 | ||
2ec9a5e0 TT |
3167 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3168 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3169 | - MAYBE_SWAP (metadata[i])) | |
3170 | / 8); | |
987d643c | 3171 | ++i; |
1fd400ff TT |
3172 | |
3173 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3174 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3175 | - MAYBE_SWAP (metadata[i])); | |
3176 | ++i; | |
3177 | ||
3876f04e DE |
3178 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3179 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3180 | - MAYBE_SWAP (metadata[i])) | |
3181 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3182 | ++i; |
9291a0cd | 3183 | |
f9d83a0b | 3184 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3185 | |
2ec9a5e0 TT |
3186 | return 1; |
3187 | } | |
3188 | ||
3189 | ||
3190 | /* Read the index file. If everything went ok, initialize the "quick" | |
3191 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3192 | ||
3193 | static int | |
3194 | dwarf2_read_index (struct objfile *objfile) | |
3195 | { | |
3196 | struct mapped_index local_map, *map; | |
3197 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3198 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3199 | struct dwz_file *dwz; |
2ec9a5e0 | 3200 | |
4262abfb | 3201 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3202 | use_deprecated_index_sections, |
3203 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3204 | &cu_list, &cu_list_elements, | |
3205 | &types_list, &types_list_elements)) | |
3206 | return 0; | |
3207 | ||
0fefef59 | 3208 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3209 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3210 | return 0; |
3211 | ||
2ec9a5e0 TT |
3212 | /* If there is a .dwz file, read it so we can get its CU list as |
3213 | well. */ | |
4db1a1dc TT |
3214 | dwz = dwarf2_get_dwz_file (); |
3215 | if (dwz != NULL) | |
2ec9a5e0 | 3216 | { |
2ec9a5e0 TT |
3217 | struct mapped_index dwz_map; |
3218 | const gdb_byte *dwz_types_ignore; | |
3219 | offset_type dwz_types_elements_ignore; | |
3220 | ||
3221 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3222 | 1, | |
3223 | &dwz->gdb_index, &dwz_map, | |
3224 | &dwz_list, &dwz_list_elements, | |
3225 | &dwz_types_ignore, | |
3226 | &dwz_types_elements_ignore)) | |
3227 | { | |
3228 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3229 | bfd_get_filename (dwz->dwz_bfd)); | |
3230 | return 0; | |
3231 | } | |
3232 | } | |
3233 | ||
74a0d9f6 JK |
3234 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3235 | dwz_list_elements); | |
1fd400ff | 3236 | |
8b70b953 TT |
3237 | if (types_list_elements) |
3238 | { | |
3239 | struct dwarf2_section_info *section; | |
3240 | ||
3241 | /* We can only handle a single .debug_types when we have an | |
3242 | index. */ | |
3243 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3244 | return 0; | |
3245 | ||
3246 | section = VEC_index (dwarf2_section_info_def, | |
3247 | dwarf2_per_objfile->types, 0); | |
3248 | ||
74a0d9f6 JK |
3249 | create_signatured_type_table_from_index (objfile, section, types_list, |
3250 | types_list_elements); | |
8b70b953 | 3251 | } |
9291a0cd | 3252 | |
2ec9a5e0 TT |
3253 | create_addrmap_from_index (objfile, &local_map); |
3254 | ||
8d749320 | 3255 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
2ec9a5e0 | 3256 | *map = local_map; |
9291a0cd TT |
3257 | |
3258 | dwarf2_per_objfile->index_table = map; | |
3259 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3260 | dwarf2_per_objfile->quick_file_names_table = |
3261 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3262 | |
3263 | return 1; | |
3264 | } | |
3265 | ||
3266 | /* A helper for the "quick" functions which sets the global | |
3267 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3268 | |
9291a0cd TT |
3269 | static void |
3270 | dw2_setup (struct objfile *objfile) | |
3271 | { | |
9a3c8263 SM |
3272 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3273 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3274 | gdb_assert (dwarf2_per_objfile); |
3275 | } | |
3276 | ||
dee91e82 | 3277 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3278 | |
dee91e82 DE |
3279 | static void |
3280 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3281 | const gdb_byte *info_ptr, |
dee91e82 DE |
3282 | struct die_info *comp_unit_die, |
3283 | int has_children, | |
3284 | void *data) | |
9291a0cd | 3285 | { |
dee91e82 DE |
3286 | struct dwarf2_cu *cu = reader->cu; |
3287 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3288 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3289 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3290 | struct line_header *lh; |
9291a0cd | 3291 | struct attribute *attr; |
dee91e82 | 3292 | int i; |
15d034d0 | 3293 | const char *name, *comp_dir; |
7b9f3c50 DE |
3294 | void **slot; |
3295 | struct quick_file_names *qfn; | |
3296 | unsigned int line_offset; | |
9291a0cd | 3297 | |
0186c6a7 DE |
3298 | gdb_assert (! this_cu->is_debug_types); |
3299 | ||
07261596 TT |
3300 | /* Our callers never want to match partial units -- instead they |
3301 | will match the enclosing full CU. */ | |
3302 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3303 | { | |
3304 | this_cu->v.quick->no_file_data = 1; | |
3305 | return; | |
3306 | } | |
3307 | ||
0186c6a7 | 3308 | lh_cu = this_cu; |
7b9f3c50 DE |
3309 | lh = NULL; |
3310 | slot = NULL; | |
3311 | line_offset = 0; | |
dee91e82 DE |
3312 | |
3313 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3314 | if (attr) |
3315 | { | |
7b9f3c50 DE |
3316 | struct quick_file_names find_entry; |
3317 | ||
3318 | line_offset = DW_UNSND (attr); | |
3319 | ||
3320 | /* We may have already read in this line header (TU line header sharing). | |
3321 | If we have we're done. */ | |
094b34ac DE |
3322 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3323 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3324 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3325 | &find_entry, INSERT); | |
3326 | if (*slot != NULL) | |
3327 | { | |
9a3c8263 | 3328 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3329 | return; |
7b9f3c50 DE |
3330 | } |
3331 | ||
3019eac3 | 3332 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3333 | } |
3334 | if (lh == NULL) | |
3335 | { | |
094b34ac | 3336 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3337 | return; |
9291a0cd TT |
3338 | } |
3339 | ||
8d749320 | 3340 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac DE |
3341 | qfn->hash.dwo_unit = cu->dwo_unit; |
3342 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3343 | gdb_assert (slot != NULL); |
3344 | *slot = qfn; | |
9291a0cd | 3345 | |
dee91e82 | 3346 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3347 | |
7b9f3c50 | 3348 | qfn->num_file_names = lh->num_file_names; |
8d749320 SM |
3349 | qfn->file_names = |
3350 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->num_file_names); | |
9291a0cd | 3351 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3352 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3353 | qfn->real_names = NULL; | |
9291a0cd | 3354 | |
7b9f3c50 | 3355 | free_line_header (lh); |
7b9f3c50 | 3356 | |
094b34ac | 3357 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3358 | } |
3359 | ||
3360 | /* A helper for the "quick" functions which attempts to read the line | |
3361 | table for THIS_CU. */ | |
3362 | ||
3363 | static struct quick_file_names * | |
e4a48d9d | 3364 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3365 | { |
0186c6a7 DE |
3366 | /* This should never be called for TUs. */ |
3367 | gdb_assert (! this_cu->is_debug_types); | |
3368 | /* Nor type unit groups. */ | |
3369 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3370 | |
dee91e82 DE |
3371 | if (this_cu->v.quick->file_names != NULL) |
3372 | return this_cu->v.quick->file_names; | |
3373 | /* If we know there is no line data, no point in looking again. */ | |
3374 | if (this_cu->v.quick->no_file_data) | |
3375 | return NULL; | |
3376 | ||
0186c6a7 | 3377 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3378 | |
3379 | if (this_cu->v.quick->no_file_data) | |
3380 | return NULL; | |
3381 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3382 | } |
3383 | ||
3384 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3385 | real path for a given file name from the line table. */ |
2fdf6df6 | 3386 | |
9291a0cd | 3387 | static const char * |
7b9f3c50 DE |
3388 | dw2_get_real_path (struct objfile *objfile, |
3389 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3390 | { |
7b9f3c50 DE |
3391 | if (qfn->real_names == NULL) |
3392 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3393 | qfn->num_file_names, const char *); |
9291a0cd | 3394 | |
7b9f3c50 DE |
3395 | if (qfn->real_names[index] == NULL) |
3396 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3397 | |
7b9f3c50 | 3398 | return qfn->real_names[index]; |
9291a0cd TT |
3399 | } |
3400 | ||
3401 | static struct symtab * | |
3402 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3403 | { | |
43f3e411 | 3404 | struct compunit_symtab *cust; |
9291a0cd | 3405 | int index; |
ae2de4f8 | 3406 | |
9291a0cd TT |
3407 | dw2_setup (objfile); |
3408 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3409 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3410 | if (cust == NULL) | |
3411 | return NULL; | |
3412 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3413 | } |
3414 | ||
7b9f3c50 DE |
3415 | /* Traversal function for dw2_forget_cached_source_info. */ |
3416 | ||
3417 | static int | |
3418 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3419 | { |
7b9f3c50 | 3420 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3421 | |
7b9f3c50 | 3422 | if (file_data->real_names) |
9291a0cd | 3423 | { |
7b9f3c50 | 3424 | int i; |
9291a0cd | 3425 | |
7b9f3c50 | 3426 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3427 | { |
7b9f3c50 DE |
3428 | xfree ((void*) file_data->real_names[i]); |
3429 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3430 | } |
3431 | } | |
7b9f3c50 DE |
3432 | |
3433 | return 1; | |
3434 | } | |
3435 | ||
3436 | static void | |
3437 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3438 | { | |
3439 | dw2_setup (objfile); | |
3440 | ||
3441 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3442 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3443 | } |
3444 | ||
f8eba3c6 TT |
3445 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3446 | the symtabs and calls the iterator. */ | |
3447 | ||
3448 | static int | |
3449 | dw2_map_expand_apply (struct objfile *objfile, | |
3450 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3451 | const char *name, const char *real_path, |
f8eba3c6 TT |
3452 | int (*callback) (struct symtab *, void *), |
3453 | void *data) | |
3454 | { | |
43f3e411 | 3455 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3456 | |
3457 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3458 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3459 | return 0; |
3460 | ||
3461 | /* This may expand more than one symtab, and we want to iterate over | |
3462 | all of them. */ | |
a0f42c21 | 3463 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3464 | |
f5b95b50 | 3465 | return iterate_over_some_symtabs (name, real_path, callback, data, |
43f3e411 | 3466 | objfile->compunit_symtabs, last_made); |
f8eba3c6 TT |
3467 | } |
3468 | ||
3469 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3470 | ||
9291a0cd | 3471 | static int |
f8eba3c6 | 3472 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3473 | const char *real_path, |
f8eba3c6 TT |
3474 | int (*callback) (struct symtab *, void *), |
3475 | void *data) | |
9291a0cd TT |
3476 | { |
3477 | int i; | |
c011a4f4 | 3478 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3479 | |
3480 | dw2_setup (objfile); | |
ae2de4f8 | 3481 | |
848e3e78 DE |
3482 | /* The rule is CUs specify all the files, including those used by |
3483 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3484 | |
848e3e78 | 3485 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3486 | { |
3487 | int j; | |
8832e7e3 | 3488 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3489 | struct quick_file_names *file_data; |
9291a0cd | 3490 | |
3d7bb9d9 | 3491 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3492 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3493 | continue; |
3494 | ||
e4a48d9d | 3495 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3496 | if (file_data == NULL) |
9291a0cd TT |
3497 | continue; |
3498 | ||
7b9f3c50 | 3499 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3500 | { |
7b9f3c50 | 3501 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3502 | const char *this_real_name; |
9291a0cd | 3503 | |
af529f8f | 3504 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3505 | { |
f5b95b50 | 3506 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3507 | callback, data)) |
3508 | return 1; | |
288e77a7 | 3509 | continue; |
4aac40c8 | 3510 | } |
9291a0cd | 3511 | |
c011a4f4 DE |
3512 | /* Before we invoke realpath, which can get expensive when many |
3513 | files are involved, do a quick comparison of the basenames. */ | |
3514 | if (! basenames_may_differ | |
3515 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3516 | continue; | |
3517 | ||
da235a7c JK |
3518 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3519 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3520 | { |
da235a7c JK |
3521 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3522 | callback, data)) | |
3523 | return 1; | |
288e77a7 | 3524 | continue; |
da235a7c | 3525 | } |
9291a0cd | 3526 | |
da235a7c JK |
3527 | if (real_path != NULL) |
3528 | { | |
af529f8f JK |
3529 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3530 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3531 | if (this_real_name != NULL |
af529f8f | 3532 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3533 | { |
f5b95b50 | 3534 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3535 | callback, data)) |
3536 | return 1; | |
288e77a7 | 3537 | continue; |
9291a0cd TT |
3538 | } |
3539 | } | |
3540 | } | |
3541 | } | |
3542 | ||
9291a0cd TT |
3543 | return 0; |
3544 | } | |
3545 | ||
da51c347 DE |
3546 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3547 | ||
3548 | struct dw2_symtab_iterator | |
9291a0cd | 3549 | { |
da51c347 DE |
3550 | /* The internalized form of .gdb_index. */ |
3551 | struct mapped_index *index; | |
3552 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3553 | int want_specific_block; | |
3554 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3555 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3556 | int block_index; | |
3557 | /* The kind of symbol we're looking for. */ | |
3558 | domain_enum domain; | |
3559 | /* The list of CUs from the index entry of the symbol, | |
3560 | or NULL if not found. */ | |
3561 | offset_type *vec; | |
3562 | /* The next element in VEC to look at. */ | |
3563 | int next; | |
3564 | /* The number of elements in VEC, or zero if there is no match. */ | |
3565 | int length; | |
8943b874 DE |
3566 | /* Have we seen a global version of the symbol? |
3567 | If so we can ignore all further global instances. | |
3568 | This is to work around gold/15646, inefficient gold-generated | |
3569 | indices. */ | |
3570 | int global_seen; | |
da51c347 | 3571 | }; |
9291a0cd | 3572 | |
da51c347 DE |
3573 | /* Initialize the index symtab iterator ITER. |
3574 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3575 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3576 | |
9291a0cd | 3577 | static void |
da51c347 DE |
3578 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3579 | struct mapped_index *index, | |
3580 | int want_specific_block, | |
3581 | int block_index, | |
3582 | domain_enum domain, | |
3583 | const char *name) | |
3584 | { | |
3585 | iter->index = index; | |
3586 | iter->want_specific_block = want_specific_block; | |
3587 | iter->block_index = block_index; | |
3588 | iter->domain = domain; | |
3589 | iter->next = 0; | |
8943b874 | 3590 | iter->global_seen = 0; |
da51c347 DE |
3591 | |
3592 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3593 | iter->length = MAYBE_SWAP (*iter->vec); | |
3594 | else | |
3595 | { | |
3596 | iter->vec = NULL; | |
3597 | iter->length = 0; | |
3598 | } | |
3599 | } | |
3600 | ||
3601 | /* Return the next matching CU or NULL if there are no more. */ | |
3602 | ||
3603 | static struct dwarf2_per_cu_data * | |
3604 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3605 | { | |
3606 | for ( ; iter->next < iter->length; ++iter->next) | |
3607 | { | |
3608 | offset_type cu_index_and_attrs = | |
3609 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3610 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3611 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3612 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3613 | /* This value is only valid for index versions >= 7. */ | |
3614 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3615 | gdb_index_symbol_kind symbol_kind = | |
3616 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3617 | /* Only check the symbol attributes if they're present. | |
3618 | Indices prior to version 7 don't record them, | |
3619 | and indices >= 7 may elide them for certain symbols | |
3620 | (gold does this). */ | |
3621 | int attrs_valid = | |
3622 | (iter->index->version >= 7 | |
3623 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3624 | ||
3190f0c6 DE |
3625 | /* Don't crash on bad data. */ |
3626 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3627 | + dwarf2_per_objfile->n_type_units)) | |
3628 | { | |
3629 | complaint (&symfile_complaints, | |
3630 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3631 | " [in module %s]"), |
3632 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3633 | continue; |
3634 | } | |
3635 | ||
8832e7e3 | 3636 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3637 | |
da51c347 | 3638 | /* Skip if already read in. */ |
43f3e411 | 3639 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3640 | continue; |
3641 | ||
8943b874 DE |
3642 | /* Check static vs global. */ |
3643 | if (attrs_valid) | |
3644 | { | |
3645 | if (iter->want_specific_block | |
3646 | && want_static != is_static) | |
3647 | continue; | |
3648 | /* Work around gold/15646. */ | |
3649 | if (!is_static && iter->global_seen) | |
3650 | continue; | |
3651 | if (!is_static) | |
3652 | iter->global_seen = 1; | |
3653 | } | |
da51c347 DE |
3654 | |
3655 | /* Only check the symbol's kind if it has one. */ | |
3656 | if (attrs_valid) | |
3657 | { | |
3658 | switch (iter->domain) | |
3659 | { | |
3660 | case VAR_DOMAIN: | |
3661 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3662 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3663 | /* Some types are also in VAR_DOMAIN. */ | |
3664 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3665 | continue; | |
3666 | break; | |
3667 | case STRUCT_DOMAIN: | |
3668 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3669 | continue; | |
3670 | break; | |
3671 | case LABEL_DOMAIN: | |
3672 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3673 | continue; | |
3674 | break; | |
3675 | default: | |
3676 | break; | |
3677 | } | |
3678 | } | |
3679 | ||
3680 | ++iter->next; | |
3681 | return per_cu; | |
3682 | } | |
3683 | ||
3684 | return NULL; | |
3685 | } | |
3686 | ||
43f3e411 | 3687 | static struct compunit_symtab * |
da51c347 DE |
3688 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3689 | const char *name, domain_enum domain) | |
9291a0cd | 3690 | { |
43f3e411 | 3691 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3692 | struct mapped_index *index; |
3693 | ||
9291a0cd TT |
3694 | dw2_setup (objfile); |
3695 | ||
156942c7 DE |
3696 | index = dwarf2_per_objfile->index_table; |
3697 | ||
da51c347 | 3698 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3699 | if (index) |
9291a0cd | 3700 | { |
da51c347 DE |
3701 | struct dw2_symtab_iterator iter; |
3702 | struct dwarf2_per_cu_data *per_cu; | |
3703 | ||
3704 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3705 | |
da51c347 | 3706 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3707 | { |
b2e2f908 | 3708 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3709 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3710 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3711 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3712 | |
b2e2f908 DE |
3713 | sym = block_find_symbol (block, name, domain, |
3714 | block_find_non_opaque_type_preferred, | |
3715 | &with_opaque); | |
3716 | ||
da51c347 DE |
3717 | /* Some caution must be observed with overloaded functions |
3718 | and methods, since the index will not contain any overload | |
3719 | information (but NAME might contain it). */ | |
da51c347 | 3720 | |
b2e2f908 DE |
3721 | if (sym != NULL |
3722 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
3723 | return stab; | |
3724 | if (with_opaque != NULL | |
3725 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
3726 | stab_best = stab; | |
da51c347 DE |
3727 | |
3728 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3729 | } |
3730 | } | |
9291a0cd | 3731 | |
da51c347 | 3732 | return stab_best; |
9291a0cd TT |
3733 | } |
3734 | ||
3735 | static void | |
3736 | dw2_print_stats (struct objfile *objfile) | |
3737 | { | |
e4a48d9d | 3738 | int i, total, count; |
9291a0cd TT |
3739 | |
3740 | dw2_setup (objfile); | |
e4a48d9d | 3741 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3742 | count = 0; |
e4a48d9d | 3743 | for (i = 0; i < total; ++i) |
9291a0cd | 3744 | { |
8832e7e3 | 3745 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3746 | |
43f3e411 | 3747 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3748 | ++count; |
3749 | } | |
e4a48d9d | 3750 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3751 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3752 | } | |
3753 | ||
779bd270 DE |
3754 | /* This dumps minimal information about the index. |
3755 | It is called via "mt print objfiles". | |
3756 | One use is to verify .gdb_index has been loaded by the | |
3757 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3758 | ||
9291a0cd TT |
3759 | static void |
3760 | dw2_dump (struct objfile *objfile) | |
3761 | { | |
779bd270 DE |
3762 | dw2_setup (objfile); |
3763 | gdb_assert (dwarf2_per_objfile->using_index); | |
3764 | printf_filtered (".gdb_index:"); | |
3765 | if (dwarf2_per_objfile->index_table != NULL) | |
3766 | { | |
3767 | printf_filtered (" version %d\n", | |
3768 | dwarf2_per_objfile->index_table->version); | |
3769 | } | |
3770 | else | |
3771 | printf_filtered (" faked for \"readnow\"\n"); | |
3772 | printf_filtered ("\n"); | |
9291a0cd TT |
3773 | } |
3774 | ||
3775 | static void | |
3189cb12 DE |
3776 | dw2_relocate (struct objfile *objfile, |
3777 | const struct section_offsets *new_offsets, | |
3778 | const struct section_offsets *delta) | |
9291a0cd TT |
3779 | { |
3780 | /* There's nothing to relocate here. */ | |
3781 | } | |
3782 | ||
3783 | static void | |
3784 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3785 | const char *func_name) | |
3786 | { | |
da51c347 DE |
3787 | struct mapped_index *index; |
3788 | ||
3789 | dw2_setup (objfile); | |
3790 | ||
3791 | index = dwarf2_per_objfile->index_table; | |
3792 | ||
3793 | /* index is NULL if OBJF_READNOW. */ | |
3794 | if (index) | |
3795 | { | |
3796 | struct dw2_symtab_iterator iter; | |
3797 | struct dwarf2_per_cu_data *per_cu; | |
3798 | ||
3799 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3800 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3801 | func_name); | |
3802 | ||
3803 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3804 | dw2_instantiate_symtab (per_cu); | |
3805 | } | |
9291a0cd TT |
3806 | } |
3807 | ||
3808 | static void | |
3809 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3810 | { | |
3811 | int i; | |
3812 | ||
3813 | dw2_setup (objfile); | |
1fd400ff TT |
3814 | |
3815 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3816 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3817 | { |
8832e7e3 | 3818 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3819 | |
a0f42c21 | 3820 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3821 | } |
3822 | } | |
3823 | ||
3824 | static void | |
652a8996 JK |
3825 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3826 | const char *fullname) | |
9291a0cd TT |
3827 | { |
3828 | int i; | |
3829 | ||
3830 | dw2_setup (objfile); | |
d4637a04 DE |
3831 | |
3832 | /* We don't need to consider type units here. | |
3833 | This is only called for examining code, e.g. expand_line_sal. | |
3834 | There can be an order of magnitude (or more) more type units | |
3835 | than comp units, and we avoid them if we can. */ | |
3836 | ||
3837 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3838 | { |
3839 | int j; | |
8832e7e3 | 3840 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 3841 | struct quick_file_names *file_data; |
9291a0cd | 3842 | |
3d7bb9d9 | 3843 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3844 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3845 | continue; |
3846 | ||
e4a48d9d | 3847 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3848 | if (file_data == NULL) |
9291a0cd TT |
3849 | continue; |
3850 | ||
7b9f3c50 | 3851 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3852 | { |
652a8996 JK |
3853 | const char *this_fullname = file_data->file_names[j]; |
3854 | ||
3855 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3856 | { |
a0f42c21 | 3857 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3858 | break; |
3859 | } | |
3860 | } | |
3861 | } | |
3862 | } | |
3863 | ||
9291a0cd | 3864 | static void |
ade7ed9e | 3865 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 3866 | const char * name, domain_enum domain, |
ade7ed9e | 3867 | int global, |
40658b94 PH |
3868 | int (*callback) (struct block *, |
3869 | struct symbol *, void *), | |
2edb89d3 JK |
3870 | void *data, symbol_compare_ftype *match, |
3871 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3872 | { |
40658b94 | 3873 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3874 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3875 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3876 | } |
3877 | ||
3878 | static void | |
f8eba3c6 TT |
3879 | dw2_expand_symtabs_matching |
3880 | (struct objfile *objfile, | |
206f2a57 DE |
3881 | expand_symtabs_file_matcher_ftype *file_matcher, |
3882 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, | |
276d885b | 3883 | expand_symtabs_exp_notify_ftype *expansion_notify, |
f8eba3c6 TT |
3884 | enum search_domain kind, |
3885 | void *data) | |
9291a0cd TT |
3886 | { |
3887 | int i; | |
3888 | offset_type iter; | |
4b5246aa | 3889 | struct mapped_index *index; |
9291a0cd TT |
3890 | |
3891 | dw2_setup (objfile); | |
ae2de4f8 DE |
3892 | |
3893 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3894 | if (!dwarf2_per_objfile->index_table) |
3895 | return; | |
4b5246aa | 3896 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3897 | |
7b08b9eb | 3898 | if (file_matcher != NULL) |
24c79950 TT |
3899 | { |
3900 | struct cleanup *cleanup; | |
3901 | htab_t visited_found, visited_not_found; | |
3902 | ||
3903 | visited_found = htab_create_alloc (10, | |
3904 | htab_hash_pointer, htab_eq_pointer, | |
3905 | NULL, xcalloc, xfree); | |
3906 | cleanup = make_cleanup_htab_delete (visited_found); | |
3907 | visited_not_found = htab_create_alloc (10, | |
3908 | htab_hash_pointer, htab_eq_pointer, | |
3909 | NULL, xcalloc, xfree); | |
3910 | make_cleanup_htab_delete (visited_not_found); | |
3911 | ||
848e3e78 DE |
3912 | /* The rule is CUs specify all the files, including those used by |
3913 | any TU, so there's no need to scan TUs here. */ | |
3914 | ||
3915 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3916 | { |
3917 | int j; | |
8832e7e3 | 3918 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
3919 | struct quick_file_names *file_data; |
3920 | void **slot; | |
7b08b9eb | 3921 | |
61d96d7e DE |
3922 | QUIT; |
3923 | ||
24c79950 | 3924 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3925 | |
24c79950 | 3926 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3927 | if (per_cu->v.quick->compunit_symtab) |
24c79950 | 3928 | continue; |
7b08b9eb | 3929 | |
e4a48d9d | 3930 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3931 | if (file_data == NULL) |
3932 | continue; | |
7b08b9eb | 3933 | |
24c79950 TT |
3934 | if (htab_find (visited_not_found, file_data) != NULL) |
3935 | continue; | |
3936 | else if (htab_find (visited_found, file_data) != NULL) | |
3937 | { | |
3938 | per_cu->v.quick->mark = 1; | |
3939 | continue; | |
3940 | } | |
3941 | ||
3942 | for (j = 0; j < file_data->num_file_names; ++j) | |
3943 | { | |
da235a7c JK |
3944 | const char *this_real_name; |
3945 | ||
fbd9ab74 | 3946 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3947 | { |
3948 | per_cu->v.quick->mark = 1; | |
3949 | break; | |
3950 | } | |
da235a7c JK |
3951 | |
3952 | /* Before we invoke realpath, which can get expensive when many | |
3953 | files are involved, do a quick comparison of the basenames. */ | |
3954 | if (!basenames_may_differ | |
3955 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3956 | data, 1)) | |
3957 | continue; | |
3958 | ||
3959 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3960 | if (file_matcher (this_real_name, data, 0)) | |
3961 | { | |
3962 | per_cu->v.quick->mark = 1; | |
3963 | break; | |
3964 | } | |
24c79950 TT |
3965 | } |
3966 | ||
3967 | slot = htab_find_slot (per_cu->v.quick->mark | |
3968 | ? visited_found | |
3969 | : visited_not_found, | |
3970 | file_data, INSERT); | |
3971 | *slot = file_data; | |
3972 | } | |
3973 | ||
3974 | do_cleanups (cleanup); | |
3975 | } | |
9291a0cd | 3976 | |
3876f04e | 3977 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3978 | { |
3979 | offset_type idx = 2 * iter; | |
3980 | const char *name; | |
3981 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 3982 | int global_seen = 0; |
9291a0cd | 3983 | |
61d96d7e DE |
3984 | QUIT; |
3985 | ||
3876f04e | 3986 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3987 | continue; |
3988 | ||
3876f04e | 3989 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3990 | |
206f2a57 | 3991 | if (! (*symbol_matcher) (name, data)) |
9291a0cd TT |
3992 | continue; |
3993 | ||
3994 | /* The name was matched, now expand corresponding CUs that were | |
3995 | marked. */ | |
4b5246aa | 3996 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3997 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3998 | vec_len = MAYBE_SWAP (vec[0]); |
3999 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4000 | { | |
e254ef6a | 4001 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 4002 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
4003 | /* This value is only valid for index versions >= 7. */ |
4004 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
4005 | gdb_index_symbol_kind symbol_kind = |
4006 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4007 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
4008 | /* Only check the symbol attributes if they're present. |
4009 | Indices prior to version 7 don't record them, | |
4010 | and indices >= 7 may elide them for certain symbols | |
4011 | (gold does this). */ | |
4012 | int attrs_valid = | |
4013 | (index->version >= 7 | |
4014 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4015 | ||
8943b874 DE |
4016 | /* Work around gold/15646. */ |
4017 | if (attrs_valid) | |
4018 | { | |
4019 | if (!is_static && global_seen) | |
4020 | continue; | |
4021 | if (!is_static) | |
4022 | global_seen = 1; | |
4023 | } | |
4024 | ||
3190f0c6 DE |
4025 | /* Only check the symbol's kind if it has one. */ |
4026 | if (attrs_valid) | |
156942c7 DE |
4027 | { |
4028 | switch (kind) | |
4029 | { | |
4030 | case VARIABLES_DOMAIN: | |
4031 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4032 | continue; | |
4033 | break; | |
4034 | case FUNCTIONS_DOMAIN: | |
4035 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
4036 | continue; | |
4037 | break; | |
4038 | case TYPES_DOMAIN: | |
4039 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4040 | continue; | |
4041 | break; | |
4042 | default: | |
4043 | break; | |
4044 | } | |
4045 | } | |
4046 | ||
3190f0c6 DE |
4047 | /* Don't crash on bad data. */ |
4048 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4049 | + dwarf2_per_objfile->n_type_units)) | |
4050 | { | |
4051 | complaint (&symfile_complaints, | |
4052 | _(".gdb_index entry has bad CU index" | |
4262abfb | 4053 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
4054 | continue; |
4055 | } | |
4056 | ||
8832e7e3 | 4057 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 4058 | if (file_matcher == NULL || per_cu->v.quick->mark) |
276d885b GB |
4059 | { |
4060 | int symtab_was_null = | |
4061 | (per_cu->v.quick->compunit_symtab == NULL); | |
4062 | ||
4063 | dw2_instantiate_symtab (per_cu); | |
4064 | ||
4065 | if (expansion_notify != NULL | |
4066 | && symtab_was_null | |
4067 | && per_cu->v.quick->compunit_symtab != NULL) | |
4068 | { | |
4069 | expansion_notify (per_cu->v.quick->compunit_symtab, | |
4070 | data); | |
4071 | } | |
4072 | } | |
9291a0cd TT |
4073 | } |
4074 | } | |
4075 | } | |
4076 | ||
43f3e411 | 4077 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4078 | symtab. */ |
4079 | ||
43f3e411 DE |
4080 | static struct compunit_symtab * |
4081 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4082 | CORE_ADDR pc) | |
9703b513 TT |
4083 | { |
4084 | int i; | |
4085 | ||
43f3e411 DE |
4086 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4087 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4088 | return cust; | |
9703b513 | 4089 | |
43f3e411 | 4090 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4091 | return NULL; |
4092 | ||
43f3e411 | 4093 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4094 | { |
43f3e411 | 4095 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4096 | |
43f3e411 | 4097 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4098 | if (s != NULL) |
4099 | return s; | |
4100 | } | |
4101 | ||
4102 | return NULL; | |
4103 | } | |
4104 | ||
43f3e411 DE |
4105 | static struct compunit_symtab * |
4106 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4107 | struct bound_minimal_symbol msymbol, | |
4108 | CORE_ADDR pc, | |
4109 | struct obj_section *section, | |
4110 | int warn_if_readin) | |
9291a0cd TT |
4111 | { |
4112 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4113 | struct compunit_symtab *result; |
9291a0cd TT |
4114 | |
4115 | dw2_setup (objfile); | |
4116 | ||
4117 | if (!objfile->psymtabs_addrmap) | |
4118 | return NULL; | |
4119 | ||
9a3c8263 SM |
4120 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4121 | pc); | |
9291a0cd TT |
4122 | if (!data) |
4123 | return NULL; | |
4124 | ||
43f3e411 | 4125 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4126 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4127 | paddress (get_objfile_arch (objfile), pc)); |
4128 | ||
43f3e411 DE |
4129 | result |
4130 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4131 | pc); | |
9703b513 TT |
4132 | gdb_assert (result != NULL); |
4133 | return result; | |
9291a0cd TT |
4134 | } |
4135 | ||
9291a0cd | 4136 | static void |
44b13c5a | 4137 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4138 | void *data, int need_fullname) |
9291a0cd TT |
4139 | { |
4140 | int i; | |
24c79950 TT |
4141 | struct cleanup *cleanup; |
4142 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
4143 | NULL, xcalloc, xfree); | |
9291a0cd | 4144 | |
24c79950 | 4145 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 4146 | dw2_setup (objfile); |
ae2de4f8 | 4147 | |
848e3e78 DE |
4148 | /* The rule is CUs specify all the files, including those used by |
4149 | any TU, so there's no need to scan TUs here. | |
4150 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 4151 | |
848e3e78 | 4152 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 | 4153 | { |
8832e7e3 | 4154 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
24c79950 | 4155 | |
43f3e411 | 4156 | if (per_cu->v.quick->compunit_symtab) |
24c79950 TT |
4157 | { |
4158 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
4159 | INSERT); | |
4160 | ||
4161 | *slot = per_cu->v.quick->file_names; | |
4162 | } | |
4163 | } | |
4164 | ||
848e3e78 | 4165 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4166 | { |
4167 | int j; | |
8832e7e3 | 4168 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 4169 | struct quick_file_names *file_data; |
24c79950 | 4170 | void **slot; |
9291a0cd | 4171 | |
3d7bb9d9 | 4172 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4173 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4174 | continue; |
4175 | ||
e4a48d9d | 4176 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4177 | if (file_data == NULL) |
9291a0cd TT |
4178 | continue; |
4179 | ||
24c79950 TT |
4180 | slot = htab_find_slot (visited, file_data, INSERT); |
4181 | if (*slot) | |
4182 | { | |
4183 | /* Already visited. */ | |
4184 | continue; | |
4185 | } | |
4186 | *slot = file_data; | |
4187 | ||
7b9f3c50 | 4188 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4189 | { |
74e2f255 DE |
4190 | const char *this_real_name; |
4191 | ||
4192 | if (need_fullname) | |
4193 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4194 | else | |
4195 | this_real_name = NULL; | |
7b9f3c50 | 4196 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
4197 | } |
4198 | } | |
24c79950 TT |
4199 | |
4200 | do_cleanups (cleanup); | |
9291a0cd TT |
4201 | } |
4202 | ||
4203 | static int | |
4204 | dw2_has_symbols (struct objfile *objfile) | |
4205 | { | |
4206 | return 1; | |
4207 | } | |
4208 | ||
4209 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4210 | { | |
4211 | dw2_has_symbols, | |
4212 | dw2_find_last_source_symtab, | |
4213 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4214 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4215 | dw2_lookup_symbol, |
9291a0cd TT |
4216 | dw2_print_stats, |
4217 | dw2_dump, | |
4218 | dw2_relocate, | |
4219 | dw2_expand_symtabs_for_function, | |
4220 | dw2_expand_all_symtabs, | |
652a8996 | 4221 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4222 | dw2_map_matching_symbols, |
9291a0cd | 4223 | dw2_expand_symtabs_matching, |
43f3e411 | 4224 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4225 | dw2_map_symbol_filenames |
4226 | }; | |
4227 | ||
4228 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4229 | file will use psymtabs, or 1 if using the GNU index. */ | |
4230 | ||
4231 | int | |
4232 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4233 | { | |
4234 | /* If we're about to read full symbols, don't bother with the | |
4235 | indices. In this case we also don't care if some other debug | |
4236 | format is making psymtabs, because they are all about to be | |
4237 | expanded anyway. */ | |
4238 | if ((objfile->flags & OBJF_READNOW)) | |
4239 | { | |
4240 | int i; | |
4241 | ||
4242 | dwarf2_per_objfile->using_index = 1; | |
4243 | create_all_comp_units (objfile); | |
0e50663e | 4244 | create_all_type_units (objfile); |
7b9f3c50 DE |
4245 | dwarf2_per_objfile->quick_file_names_table = |
4246 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4247 | |
1fd400ff | 4248 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4249 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4250 | { |
8832e7e3 | 4251 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4252 | |
e254ef6a DE |
4253 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4254 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4255 | } |
4256 | ||
4257 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4258 | these functions will be no-ops because we will have expanded | |
4259 | all symtabs. */ | |
4260 | return 1; | |
4261 | } | |
4262 | ||
4263 | if (dwarf2_read_index (objfile)) | |
4264 | return 1; | |
4265 | ||
9291a0cd TT |
4266 | return 0; |
4267 | } | |
4268 | ||
4269 | \f | |
4270 | ||
dce234bc PP |
4271 | /* Build a partial symbol table. */ |
4272 | ||
4273 | void | |
f29dff0a | 4274 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4275 | { |
c9bf0622 | 4276 | |
f29dff0a | 4277 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4278 | { |
4279 | init_psymbol_list (objfile, 1024); | |
4280 | } | |
4281 | ||
492d29ea | 4282 | TRY |
c9bf0622 TT |
4283 | { |
4284 | /* This isn't really ideal: all the data we allocate on the | |
4285 | objfile's obstack is still uselessly kept around. However, | |
4286 | freeing it seems unsafe. */ | |
4287 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
4288 | ||
4289 | dwarf2_build_psymtabs_hard (objfile); | |
4290 | discard_cleanups (cleanups); | |
4291 | } | |
492d29ea PA |
4292 | CATCH (except, RETURN_MASK_ERROR) |
4293 | { | |
4294 | exception_print (gdb_stderr, except); | |
4295 | } | |
4296 | END_CATCH | |
c906108c | 4297 | } |
c906108c | 4298 | |
1ce1cefd DE |
4299 | /* Return the total length of the CU described by HEADER. */ |
4300 | ||
4301 | static unsigned int | |
4302 | get_cu_length (const struct comp_unit_head *header) | |
4303 | { | |
4304 | return header->initial_length_size + header->length; | |
4305 | } | |
4306 | ||
45452591 DE |
4307 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
4308 | ||
4309 | static inline int | |
b64f50a1 | 4310 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 4311 | { |
b64f50a1 | 4312 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 4313 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 4314 | |
b64f50a1 | 4315 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
4316 | } |
4317 | ||
3b80fe9b DE |
4318 | /* Find the base address of the compilation unit for range lists and |
4319 | location lists. It will normally be specified by DW_AT_low_pc. | |
4320 | In DWARF-3 draft 4, the base address could be overridden by | |
4321 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4322 | compilation units with discontinuous ranges. */ | |
4323 | ||
4324 | static void | |
4325 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4326 | { | |
4327 | struct attribute *attr; | |
4328 | ||
4329 | cu->base_known = 0; | |
4330 | cu->base_address = 0; | |
4331 | ||
4332 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4333 | if (attr) | |
4334 | { | |
31aa7e4e | 4335 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4336 | cu->base_known = 1; |
4337 | } | |
4338 | else | |
4339 | { | |
4340 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4341 | if (attr) | |
4342 | { | |
31aa7e4e | 4343 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4344 | cu->base_known = 1; |
4345 | } | |
4346 | } | |
4347 | } | |
4348 | ||
93311388 DE |
4349 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4350 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4351 | by the caller. */ | |
107d2387 | 4352 | |
d521ce57 | 4353 | static const gdb_byte * |
107d2387 | 4354 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4355 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4356 | { |
4357 | int signed_addr; | |
891d2f0b | 4358 | unsigned int bytes_read; |
c764a876 DE |
4359 | |
4360 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4361 | cu_header->initial_length_size = bytes_read; | |
4362 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4363 | info_ptr += bytes_read; |
107d2387 AC |
4364 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4365 | info_ptr += 2; | |
b64f50a1 JK |
4366 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4367 | &bytes_read); | |
613e1657 | 4368 | info_ptr += bytes_read; |
107d2387 AC |
4369 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4370 | info_ptr += 1; | |
4371 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4372 | if (signed_addr < 0) | |
8e65ff28 | 4373 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4374 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4375 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4376 | |
107d2387 AC |
4377 | return info_ptr; |
4378 | } | |
4379 | ||
36586728 TT |
4380 | /* Helper function that returns the proper abbrev section for |
4381 | THIS_CU. */ | |
4382 | ||
4383 | static struct dwarf2_section_info * | |
4384 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4385 | { | |
4386 | struct dwarf2_section_info *abbrev; | |
4387 | ||
4388 | if (this_cu->is_dwz) | |
4389 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4390 | else | |
4391 | abbrev = &dwarf2_per_objfile->abbrev; | |
4392 | ||
4393 | return abbrev; | |
4394 | } | |
4395 | ||
9ff913ba DE |
4396 | /* Subroutine of read_and_check_comp_unit_head and |
4397 | read_and_check_type_unit_head to simplify them. | |
4398 | Perform various error checking on the header. */ | |
4399 | ||
4400 | static void | |
4401 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4402 | struct dwarf2_section_info *section, |
4403 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4404 | { |
a32a8923 | 4405 | const char *filename = get_section_file_name (section); |
9ff913ba DE |
4406 | |
4407 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4408 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4409 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4410 | filename); | |
4411 | ||
b64f50a1 | 4412 | if (header->abbrev_offset.sect_off |
36586728 | 4413 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4414 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4415 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4416 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4417 | filename); |
4418 | ||
4419 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4420 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4421 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4422 | > section->size) |
4423 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4424 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4425 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4426 | filename); |
4427 | } | |
4428 | ||
4429 | /* Read in a CU/TU header and perform some basic error checking. | |
4430 | The contents of the header are stored in HEADER. | |
4431 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4432 | |
d521ce57 | 4433 | static const gdb_byte * |
9ff913ba DE |
4434 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4435 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4436 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4437 | const gdb_byte *info_ptr, |
9ff913ba | 4438 | int is_debug_types_section) |
72bf9492 | 4439 | { |
d521ce57 | 4440 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4441 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4442 | |
b64f50a1 | 4443 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4444 | |
72bf9492 DJ |
4445 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4446 | ||
460c1c54 CC |
4447 | /* If we're reading a type unit, skip over the signature and |
4448 | type_offset fields. */ | |
b0df02fd | 4449 | if (is_debug_types_section) |
460c1c54 CC |
4450 | info_ptr += 8 /*signature*/ + header->offset_size; |
4451 | ||
b64f50a1 | 4452 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4453 | |
4bdcc0c1 | 4454 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4455 | |
4456 | return info_ptr; | |
4457 | } | |
4458 | ||
348e048f DE |
4459 | /* Read in the types comp unit header information from .debug_types entry at |
4460 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4461 | ||
d521ce57 | 4462 | static const gdb_byte * |
9ff913ba DE |
4463 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4464 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4465 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4466 | const gdb_byte *info_ptr, |
dee91e82 DE |
4467 | ULONGEST *signature, |
4468 | cu_offset *type_offset_in_tu) | |
348e048f | 4469 | { |
d521ce57 | 4470 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4471 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4472 | |
b64f50a1 | 4473 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4474 | |
9ff913ba | 4475 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4476 | |
9ff913ba DE |
4477 | /* If we're reading a type unit, skip over the signature and |
4478 | type_offset fields. */ | |
4479 | if (signature != NULL) | |
4480 | *signature = read_8_bytes (abfd, info_ptr); | |
4481 | info_ptr += 8; | |
dee91e82 DE |
4482 | if (type_offset_in_tu != NULL) |
4483 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4484 | header->offset_size); | |
9ff913ba DE |
4485 | info_ptr += header->offset_size; |
4486 | ||
b64f50a1 | 4487 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4488 | |
4bdcc0c1 | 4489 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4490 | |
4491 | return info_ptr; | |
348e048f DE |
4492 | } |
4493 | ||
f4dc4d17 DE |
4494 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4495 | ||
4496 | static sect_offset | |
4497 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4498 | sect_offset offset) | |
4499 | { | |
a32a8923 | 4500 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4501 | const gdb_byte *info_ptr; |
ac298888 | 4502 | unsigned int initial_length_size, offset_size; |
f4dc4d17 DE |
4503 | sect_offset abbrev_offset; |
4504 | ||
4505 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4506 | info_ptr = section->buffer + offset.sect_off; | |
ac298888 | 4507 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 DE |
4508 | offset_size = initial_length_size == 4 ? 4 : 8; |
4509 | info_ptr += initial_length_size + 2 /*version*/; | |
4510 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4511 | return abbrev_offset; | |
4512 | } | |
4513 | ||
aaa75496 JB |
4514 | /* Allocate a new partial symtab for file named NAME and mark this new |
4515 | partial symtab as being an include of PST. */ | |
4516 | ||
4517 | static void | |
d521ce57 | 4518 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4519 | struct objfile *objfile) |
4520 | { | |
4521 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4522 | ||
fbd9ab74 JK |
4523 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4524 | { | |
4525 | /* It shares objfile->objfile_obstack. */ | |
4526 | subpst->dirname = pst->dirname; | |
4527 | } | |
4528 | ||
aaa75496 JB |
4529 | subpst->textlow = 0; |
4530 | subpst->texthigh = 0; | |
4531 | ||
8d749320 SM |
4532 | subpst->dependencies |
4533 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
4534 | subpst->dependencies[0] = pst; |
4535 | subpst->number_of_dependencies = 1; | |
4536 | ||
4537 | subpst->globals_offset = 0; | |
4538 | subpst->n_global_syms = 0; | |
4539 | subpst->statics_offset = 0; | |
4540 | subpst->n_static_syms = 0; | |
43f3e411 | 4541 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
4542 | subpst->read_symtab = pst->read_symtab; |
4543 | subpst->readin = 0; | |
4544 | ||
4545 | /* No private part is necessary for include psymtabs. This property | |
4546 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4547 | the regular ones. */ |
58a9656e | 4548 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4549 | } |
4550 | ||
4551 | /* Read the Line Number Program data and extract the list of files | |
4552 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4553 | partial symtab for each of these included files. */ |
aaa75496 JB |
4554 | |
4555 | static void | |
4556 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4557 | struct die_info *die, |
4558 | struct partial_symtab *pst) | |
aaa75496 | 4559 | { |
d85a05f0 DJ |
4560 | struct line_header *lh = NULL; |
4561 | struct attribute *attr; | |
aaa75496 | 4562 | |
d85a05f0 DJ |
4563 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4564 | if (attr) | |
3019eac3 | 4565 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4566 | if (lh == NULL) |
4567 | return; /* No linetable, so no includes. */ | |
4568 | ||
c6da4cef | 4569 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
527f3840 | 4570 | dwarf_decode_lines (lh, pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
4571 | |
4572 | free_line_header (lh); | |
4573 | } | |
4574 | ||
348e048f | 4575 | static hashval_t |
52dc124a | 4576 | hash_signatured_type (const void *item) |
348e048f | 4577 | { |
9a3c8263 SM |
4578 | const struct signatured_type *sig_type |
4579 | = (const struct signatured_type *) item; | |
9a619af0 | 4580 | |
348e048f | 4581 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4582 | return sig_type->signature; |
348e048f DE |
4583 | } |
4584 | ||
4585 | static int | |
52dc124a | 4586 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 4587 | { |
9a3c8263 SM |
4588 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
4589 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 4590 | |
348e048f DE |
4591 | return lhs->signature == rhs->signature; |
4592 | } | |
4593 | ||
1fd400ff TT |
4594 | /* Allocate a hash table for signatured types. */ |
4595 | ||
4596 | static htab_t | |
673bfd45 | 4597 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4598 | { |
4599 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4600 | hash_signatured_type, |
4601 | eq_signatured_type, | |
1fd400ff TT |
4602 | NULL, |
4603 | &objfile->objfile_obstack, | |
4604 | hashtab_obstack_allocate, | |
4605 | dummy_obstack_deallocate); | |
4606 | } | |
4607 | ||
d467dd73 | 4608 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4609 | |
4610 | static int | |
d467dd73 | 4611 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 4612 | { |
9a3c8263 SM |
4613 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
4614 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 4615 | |
b4dd5633 | 4616 | **datap = sigt; |
1fd400ff TT |
4617 | ++*datap; |
4618 | ||
4619 | return 1; | |
4620 | } | |
4621 | ||
c88ee1f0 DE |
4622 | /* Create the hash table of all entries in the .debug_types |
4623 | (or .debug_types.dwo) section(s). | |
4624 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4625 | otherwise it is NULL. | |
4626 | ||
4627 | The result is a pointer to the hash table or NULL if there are no types. | |
4628 | ||
4629 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4630 | |
3019eac3 DE |
4631 | static htab_t |
4632 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4633 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4634 | { |
3019eac3 | 4635 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4636 | htab_t types_htab = NULL; |
8b70b953 TT |
4637 | int ix; |
4638 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4639 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4640 | |
3019eac3 DE |
4641 | if (VEC_empty (dwarf2_section_info_def, types)) |
4642 | return NULL; | |
348e048f | 4643 | |
4bdcc0c1 DE |
4644 | abbrev_section = (dwo_file != NULL |
4645 | ? &dwo_file->sections.abbrev | |
4646 | : &dwarf2_per_objfile->abbrev); | |
4647 | ||
b4f54984 | 4648 | if (dwarf_read_debug) |
09406207 DE |
4649 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", |
4650 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4651 | get_section_file_name (abbrev_section)); |
09406207 | 4652 | |
8b70b953 | 4653 | for (ix = 0; |
3019eac3 | 4654 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4655 | ++ix) |
4656 | { | |
3019eac3 | 4657 | bfd *abfd; |
d521ce57 | 4658 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4659 | |
8b70b953 TT |
4660 | dwarf2_read_section (objfile, section); |
4661 | info_ptr = section->buffer; | |
348e048f | 4662 | |
8b70b953 TT |
4663 | if (info_ptr == NULL) |
4664 | continue; | |
348e048f | 4665 | |
3019eac3 | 4666 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4667 | not present, in which case the bfd is unknown. */ |
4668 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4669 | |
dee91e82 DE |
4670 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4671 | because we don't need to read any dies: the signature is in the | |
4672 | header. */ | |
8b70b953 TT |
4673 | |
4674 | end_ptr = info_ptr + section->size; | |
4675 | while (info_ptr < end_ptr) | |
4676 | { | |
b64f50a1 | 4677 | sect_offset offset; |
3019eac3 | 4678 | cu_offset type_offset_in_tu; |
8b70b953 | 4679 | ULONGEST signature; |
52dc124a | 4680 | struct signatured_type *sig_type; |
3019eac3 | 4681 | struct dwo_unit *dwo_tu; |
8b70b953 | 4682 | void **slot; |
d521ce57 | 4683 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4684 | struct comp_unit_head header; |
dee91e82 | 4685 | unsigned int length; |
348e048f | 4686 | |
b64f50a1 | 4687 | offset.sect_off = ptr - section->buffer; |
348e048f | 4688 | |
8b70b953 | 4689 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4690 | table, but we don't need anything else just yet. */ |
348e048f | 4691 | |
4bdcc0c1 DE |
4692 | ptr = read_and_check_type_unit_head (&header, section, |
4693 | abbrev_section, ptr, | |
3019eac3 | 4694 | &signature, &type_offset_in_tu); |
6caca83c | 4695 | |
1ce1cefd | 4696 | length = get_cu_length (&header); |
dee91e82 | 4697 | |
6caca83c | 4698 | /* Skip dummy type units. */ |
dee91e82 DE |
4699 | if (ptr >= info_ptr + length |
4700 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4701 | { |
1ce1cefd | 4702 | info_ptr += length; |
6caca83c CC |
4703 | continue; |
4704 | } | |
8b70b953 | 4705 | |
0349ea22 DE |
4706 | if (types_htab == NULL) |
4707 | { | |
4708 | if (dwo_file) | |
4709 | types_htab = allocate_dwo_unit_table (objfile); | |
4710 | else | |
4711 | types_htab = allocate_signatured_type_table (objfile); | |
4712 | } | |
4713 | ||
3019eac3 DE |
4714 | if (dwo_file) |
4715 | { | |
4716 | sig_type = NULL; | |
4717 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4718 | struct dwo_unit); | |
4719 | dwo_tu->dwo_file = dwo_file; | |
4720 | dwo_tu->signature = signature; | |
4721 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4722 | dwo_tu->section = section; |
3019eac3 DE |
4723 | dwo_tu->offset = offset; |
4724 | dwo_tu->length = length; | |
4725 | } | |
4726 | else | |
4727 | { | |
4728 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4729 | The real type_offset is in the DWO file. */ | |
4730 | dwo_tu = NULL; | |
4731 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4732 | struct signatured_type); | |
4733 | sig_type->signature = signature; | |
4734 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4735 | sig_type->per_cu.objfile = objfile; | |
4736 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4737 | sig_type->per_cu.section = section; |
3019eac3 DE |
4738 | sig_type->per_cu.offset = offset; |
4739 | sig_type->per_cu.length = length; | |
4740 | } | |
8b70b953 | 4741 | |
3019eac3 DE |
4742 | slot = htab_find_slot (types_htab, |
4743 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4744 | INSERT); | |
8b70b953 TT |
4745 | gdb_assert (slot != NULL); |
4746 | if (*slot != NULL) | |
4747 | { | |
3019eac3 DE |
4748 | sect_offset dup_offset; |
4749 | ||
4750 | if (dwo_file) | |
4751 | { | |
9a3c8263 SM |
4752 | const struct dwo_unit *dup_tu |
4753 | = (const struct dwo_unit *) *slot; | |
3019eac3 DE |
4754 | |
4755 | dup_offset = dup_tu->offset; | |
4756 | } | |
4757 | else | |
4758 | { | |
9a3c8263 SM |
4759 | const struct signatured_type *dup_tu |
4760 | = (const struct signatured_type *) *slot; | |
3019eac3 DE |
4761 | |
4762 | dup_offset = dup_tu->per_cu.offset; | |
4763 | } | |
b3c8eb43 | 4764 | |
8b70b953 | 4765 | complaint (&symfile_complaints, |
c88ee1f0 | 4766 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4767 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4768 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4769 | hex_string (signature)); |
8b70b953 | 4770 | } |
3019eac3 | 4771 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4772 | |
b4f54984 | 4773 | if (dwarf_read_debug > 1) |
4031ecc5 | 4774 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4775 | offset.sect_off, |
4031ecc5 | 4776 | hex_string (signature)); |
348e048f | 4777 | |
dee91e82 | 4778 | info_ptr += length; |
8b70b953 | 4779 | } |
348e048f DE |
4780 | } |
4781 | ||
3019eac3 DE |
4782 | return types_htab; |
4783 | } | |
4784 | ||
4785 | /* Create the hash table of all entries in the .debug_types section, | |
4786 | and initialize all_type_units. | |
4787 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4788 | otherwise non-zero. */ | |
4789 | ||
4790 | static int | |
4791 | create_all_type_units (struct objfile *objfile) | |
4792 | { | |
4793 | htab_t types_htab; | |
b4dd5633 | 4794 | struct signatured_type **iter; |
3019eac3 DE |
4795 | |
4796 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4797 | if (types_htab == NULL) | |
4798 | { | |
4799 | dwarf2_per_objfile->signatured_types = NULL; | |
4800 | return 0; | |
4801 | } | |
4802 | ||
348e048f DE |
4803 | dwarf2_per_objfile->signatured_types = types_htab; |
4804 | ||
6aa5f3a6 DE |
4805 | dwarf2_per_objfile->n_type_units |
4806 | = dwarf2_per_objfile->n_allocated_type_units | |
4807 | = htab_elements (types_htab); | |
8d749320 SM |
4808 | dwarf2_per_objfile->all_type_units = |
4809 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
4810 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4811 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4812 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4813 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4814 | |
348e048f DE |
4815 | return 1; |
4816 | } | |
4817 | ||
6aa5f3a6 DE |
4818 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
4819 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
4820 | Otherwise we find one. */ | |
4821 | ||
4822 | static struct signatured_type * | |
4823 | add_type_unit (ULONGEST sig, void **slot) | |
4824 | { | |
4825 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4826 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4827 | struct signatured_type *sig_type; | |
4828 | ||
4829 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
4830 | ++n_type_units; | |
4831 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
4832 | { | |
4833 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
4834 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
4835 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
4836 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
4837 | = XRESIZEVEC (struct signatured_type *, |
4838 | dwarf2_per_objfile->all_type_units, | |
4839 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
4840 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
4841 | } | |
4842 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4843 | ||
4844 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4845 | struct signatured_type); | |
4846 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4847 | sig_type->signature = sig; | |
4848 | sig_type->per_cu.is_debug_types = 1; | |
4849 | if (dwarf2_per_objfile->using_index) | |
4850 | { | |
4851 | sig_type->per_cu.v.quick = | |
4852 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4853 | struct dwarf2_per_cu_quick_data); | |
4854 | } | |
4855 | ||
4856 | if (slot == NULL) | |
4857 | { | |
4858 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4859 | sig_type, INSERT); | |
4860 | } | |
4861 | gdb_assert (*slot == NULL); | |
4862 | *slot = sig_type; | |
4863 | /* The rest of sig_type must be filled in by the caller. */ | |
4864 | return sig_type; | |
4865 | } | |
4866 | ||
a2ce51a0 DE |
4867 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4868 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4869 | ||
4870 | static void | |
4871 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4872 | struct signatured_type *sig_entry, | |
4873 | struct dwo_unit *dwo_entry) | |
4874 | { | |
7ee85ab1 | 4875 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4876 | gdb_assert (! sig_entry->per_cu.queued); |
4877 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
4878 | if (dwarf2_per_objfile->using_index) |
4879 | { | |
4880 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 4881 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
4882 | } |
4883 | else | |
4884 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 DE |
4885 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
4886 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4887 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4888 | gdb_assert (sig_entry->dwo_unit == NULL); |
4889 | ||
4890 | sig_entry->per_cu.section = dwo_entry->section; | |
4891 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4892 | sig_entry->per_cu.length = dwo_entry->length; | |
4893 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4894 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4895 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4896 | sig_entry->dwo_unit = dwo_entry; | |
4897 | } | |
4898 | ||
4899 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4900 | If we haven't read the TU yet, create the signatured_type data structure |
4901 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4902 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4903 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4904 | containing that CU. Otherwise we could end up reading several other DWO | |
4905 | files (due to comdat folding) to process the transitive closure of all the | |
4906 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4907 | type signature that it needs. | |
a2ce51a0 DE |
4908 | We only do this for .gdb_index because in the psymtab case we already have |
4909 | to read all the DWOs to build the type unit groups. */ | |
4910 | ||
4911 | static struct signatured_type * | |
4912 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4913 | { | |
4914 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4915 | struct dwo_file *dwo_file; | |
4916 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4917 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4918 | void **slot; |
a2ce51a0 DE |
4919 | |
4920 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4921 | ||
6aa5f3a6 DE |
4922 | /* If TU skeletons have been removed then we may not have read in any |
4923 | TUs yet. */ | |
4924 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4925 | { | |
4926 | dwarf2_per_objfile->signatured_types | |
4927 | = allocate_signatured_type_table (objfile); | |
4928 | } | |
a2ce51a0 DE |
4929 | |
4930 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
4931 | Use the global signatured_types array to do our own comdat-folding |
4932 | of types. If this is the first time we're reading this TU, and | |
4933 | the TU has an entry in .gdb_index, replace the recorded data from | |
4934 | .gdb_index with this TU. */ | |
a2ce51a0 | 4935 | |
a2ce51a0 | 4936 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
4937 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
4938 | &find_sig_entry, INSERT); | |
9a3c8263 | 4939 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
4940 | |
4941 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
4942 | read. Don't reassign the global entry to point to this DWO if that's |
4943 | the case. Also note that if the TU is already being read, it may not | |
4944 | have come from a DWO, the program may be a mix of Fission-compiled | |
4945 | code and non-Fission-compiled code. */ | |
4946 | ||
4947 | /* Have we already tried to read this TU? | |
4948 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
4949 | needn't exist in the global table yet). */ | |
4950 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
4951 | return sig_entry; |
4952 | ||
6aa5f3a6 DE |
4953 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
4954 | dwo_unit of the TU itself. */ | |
4955 | dwo_file = cu->dwo_unit->dwo_file; | |
4956 | ||
a2ce51a0 DE |
4957 | /* Ok, this is the first time we're reading this TU. */ |
4958 | if (dwo_file->tus == NULL) | |
4959 | return NULL; | |
4960 | find_dwo_entry.signature = sig; | |
9a3c8263 | 4961 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
4962 | if (dwo_entry == NULL) |
4963 | return NULL; | |
4964 | ||
6aa5f3a6 DE |
4965 | /* If the global table doesn't have an entry for this TU, add one. */ |
4966 | if (sig_entry == NULL) | |
4967 | sig_entry = add_type_unit (sig, slot); | |
4968 | ||
a2ce51a0 | 4969 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 4970 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4971 | return sig_entry; |
4972 | } | |
4973 | ||
a2ce51a0 DE |
4974 | /* Subroutine of lookup_signatured_type. |
4975 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
4976 | then try the DWP file. If the TU stub (skeleton) has been removed then |
4977 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
4978 | |
4979 | static struct signatured_type * | |
4980 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4981 | { | |
4982 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4983 | struct dwp_file *dwp_file = get_dwp_file (); | |
4984 | struct dwo_unit *dwo_entry; | |
4985 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4986 | void **slot; |
a2ce51a0 DE |
4987 | |
4988 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4989 | gdb_assert (dwp_file != NULL); | |
4990 | ||
6aa5f3a6 DE |
4991 | /* If TU skeletons have been removed then we may not have read in any |
4992 | TUs yet. */ | |
4993 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 4994 | { |
6aa5f3a6 DE |
4995 | dwarf2_per_objfile->signatured_types |
4996 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
4997 | } |
4998 | ||
6aa5f3a6 DE |
4999 | find_sig_entry.signature = sig; |
5000 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5001 | &find_sig_entry, INSERT); | |
9a3c8263 | 5002 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5003 | |
5004 | /* Have we already tried to read this TU? | |
5005 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5006 | needn't exist in the global table yet). */ | |
5007 | if (sig_entry != NULL) | |
5008 | return sig_entry; | |
5009 | ||
a2ce51a0 DE |
5010 | if (dwp_file->tus == NULL) |
5011 | return NULL; | |
57d63ce2 DE |
5012 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5013 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5014 | if (dwo_entry == NULL) |
5015 | return NULL; | |
5016 | ||
6aa5f3a6 | 5017 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5018 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5019 | ||
a2ce51a0 DE |
5020 | return sig_entry; |
5021 | } | |
5022 | ||
380bca97 | 5023 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5024 | Returns NULL if signature SIG is not present in the table. |
5025 | It is up to the caller to complain about this. */ | |
348e048f DE |
5026 | |
5027 | static struct signatured_type * | |
a2ce51a0 | 5028 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5029 | { |
a2ce51a0 DE |
5030 | if (cu->dwo_unit |
5031 | && dwarf2_per_objfile->using_index) | |
5032 | { | |
5033 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5034 | These cases require special processing. */ | |
5035 | if (get_dwp_file () == NULL) | |
5036 | return lookup_dwo_signatured_type (cu, sig); | |
5037 | else | |
5038 | return lookup_dwp_signatured_type (cu, sig); | |
5039 | } | |
5040 | else | |
5041 | { | |
5042 | struct signatured_type find_entry, *entry; | |
348e048f | 5043 | |
a2ce51a0 DE |
5044 | if (dwarf2_per_objfile->signatured_types == NULL) |
5045 | return NULL; | |
5046 | find_entry.signature = sig; | |
9a3c8263 SM |
5047 | entry = ((struct signatured_type *) |
5048 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5049 | return entry; |
5050 | } | |
348e048f | 5051 | } |
42e7ad6c DE |
5052 | \f |
5053 | /* Low level DIE reading support. */ | |
348e048f | 5054 | |
d85a05f0 DJ |
5055 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5056 | ||
5057 | static void | |
5058 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5059 | struct dwarf2_cu *cu, |
3019eac3 DE |
5060 | struct dwarf2_section_info *section, |
5061 | struct dwo_file *dwo_file) | |
d85a05f0 | 5062 | { |
fceca515 | 5063 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5064 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5065 | reader->cu = cu; |
3019eac3 | 5066 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5067 | reader->die_section = section; |
5068 | reader->buffer = section->buffer; | |
f664829e | 5069 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5070 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5071 | } |
5072 | ||
b0c7bfa9 DE |
5073 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5074 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5075 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5076 | already. | |
5077 | ||
5078 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5079 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5080 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5081 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5082 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5083 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5084 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5085 | are filled in with the info of the DIE from the DWO file. | |
5086 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5087 | provided an abbrev table to use. | |
5088 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5089 | ||
5090 | static int | |
5091 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5092 | struct dwo_unit *dwo_unit, | |
5093 | int abbrev_table_provided, | |
5094 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5095 | const char *stub_comp_dir, |
b0c7bfa9 | 5096 | struct die_reader_specs *result_reader, |
d521ce57 | 5097 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5098 | struct die_info **result_comp_unit_die, |
5099 | int *result_has_children) | |
5100 | { | |
5101 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5102 | struct dwarf2_cu *cu = this_cu->cu; | |
5103 | struct dwarf2_section_info *section; | |
5104 | bfd *abfd; | |
d521ce57 | 5105 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5106 | ULONGEST signature; /* Or dwo_id. */ |
5107 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5108 | int i,num_extra_attrs; | |
5109 | struct dwarf2_section_info *dwo_abbrev_section; | |
5110 | struct attribute *attr; | |
5111 | struct die_info *comp_unit_die; | |
5112 | ||
b0aeadb3 DE |
5113 | /* At most one of these may be provided. */ |
5114 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5115 | |
b0c7bfa9 DE |
5116 | /* These attributes aren't processed until later: |
5117 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5118 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5119 | referenced later. However, these attributes are found in the stub | |
5120 | which we won't have later. In order to not impose this complication | |
5121 | on the rest of the code, we read them here and copy them to the | |
5122 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5123 | |
5124 | stmt_list = NULL; | |
5125 | low_pc = NULL; | |
5126 | high_pc = NULL; | |
5127 | ranges = NULL; | |
5128 | comp_dir = NULL; | |
5129 | ||
5130 | if (stub_comp_unit_die != NULL) | |
5131 | { | |
5132 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5133 | DWO file. */ | |
5134 | if (! this_cu->is_debug_types) | |
5135 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5136 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5137 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5138 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5139 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5140 | ||
5141 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5142 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5143 | cu->addr_base = 0; | |
5144 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5145 | if (attr) | |
5146 | cu->addr_base = DW_UNSND (attr); | |
5147 | ||
5148 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5149 | We need the value before we can process DW_AT_ranges. */ | |
5150 | cu->ranges_base = 0; | |
5151 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5152 | if (attr) | |
5153 | cu->ranges_base = DW_UNSND (attr); | |
5154 | } | |
a2ce51a0 DE |
5155 | else if (stub_comp_dir != NULL) |
5156 | { | |
5157 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5158 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5159 | comp_dir->name = DW_AT_comp_dir; |
5160 | comp_dir->form = DW_FORM_string; | |
5161 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5162 | DW_STRING (comp_dir) = stub_comp_dir; | |
5163 | } | |
b0c7bfa9 DE |
5164 | |
5165 | /* Set up for reading the DWO CU/TU. */ | |
5166 | cu->dwo_unit = dwo_unit; | |
5167 | section = dwo_unit->section; | |
5168 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5169 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
5170 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
5171 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
5172 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5173 | ||
5174 | if (this_cu->is_debug_types) | |
5175 | { | |
5176 | ULONGEST header_signature; | |
5177 | cu_offset type_offset_in_tu; | |
5178 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
5179 | ||
5180 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
5181 | dwo_abbrev_section, | |
5182 | info_ptr, | |
5183 | &header_signature, | |
5184 | &type_offset_in_tu); | |
a2ce51a0 DE |
5185 | /* This is not an assert because it can be caused by bad debug info. */ |
5186 | if (sig_type->signature != header_signature) | |
5187 | { | |
5188 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5189 | " TU at offset 0x%x [in module %s]"), | |
5190 | hex_string (sig_type->signature), | |
5191 | hex_string (header_signature), | |
5192 | dwo_unit->offset.sect_off, | |
5193 | bfd_get_filename (abfd)); | |
5194 | } | |
b0c7bfa9 DE |
5195 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
5196 | /* For DWOs coming from DWP files, we don't know the CU length | |
5197 | nor the type's offset in the TU until now. */ | |
5198 | dwo_unit->length = get_cu_length (&cu->header); | |
5199 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
5200 | ||
5201 | /* Establish the type offset that can be used to lookup the type. | |
5202 | For DWO files, we don't know it until now. */ | |
5203 | sig_type->type_offset_in_section.sect_off = | |
5204 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
5205 | } | |
5206 | else | |
5207 | { | |
5208 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5209 | dwo_abbrev_section, | |
5210 | info_ptr, 0); | |
5211 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
5212 | /* For DWOs coming from DWP files, we don't know the CU length | |
5213 | until now. */ | |
5214 | dwo_unit->length = get_cu_length (&cu->header); | |
5215 | } | |
5216 | ||
02142a6c DE |
5217 | /* Replace the CU's original abbrev table with the DWO's. |
5218 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5219 | if (abbrev_table_provided) |
5220 | { | |
5221 | /* Don't free the provided abbrev table, the caller of | |
5222 | init_cutu_and_read_dies owns it. */ | |
5223 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5224 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5225 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5226 | } | |
5227 | else | |
5228 | { | |
5229 | dwarf2_free_abbrev_table (cu); | |
5230 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5231 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5232 | } |
5233 | ||
5234 | /* Read in the die, but leave space to copy over the attributes | |
5235 | from the stub. This has the benefit of simplifying the rest of | |
5236 | the code - all the work to maintain the illusion of a single | |
5237 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5238 | num_extra_attrs = ((stmt_list != NULL) | |
5239 | + (low_pc != NULL) | |
5240 | + (high_pc != NULL) | |
5241 | + (ranges != NULL) | |
5242 | + (comp_dir != NULL)); | |
5243 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5244 | result_has_children, num_extra_attrs); | |
5245 | ||
5246 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5247 | comp_unit_die = *result_comp_unit_die; | |
5248 | i = comp_unit_die->num_attrs; | |
5249 | if (stmt_list != NULL) | |
5250 | comp_unit_die->attrs[i++] = *stmt_list; | |
5251 | if (low_pc != NULL) | |
5252 | comp_unit_die->attrs[i++] = *low_pc; | |
5253 | if (high_pc != NULL) | |
5254 | comp_unit_die->attrs[i++] = *high_pc; | |
5255 | if (ranges != NULL) | |
5256 | comp_unit_die->attrs[i++] = *ranges; | |
5257 | if (comp_dir != NULL) | |
5258 | comp_unit_die->attrs[i++] = *comp_dir; | |
5259 | comp_unit_die->num_attrs += num_extra_attrs; | |
5260 | ||
b4f54984 | 5261 | if (dwarf_die_debug) |
bf6af496 DE |
5262 | { |
5263 | fprintf_unfiltered (gdb_stdlog, | |
5264 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5265 | get_section_name (section), |
bf6af496 DE |
5266 | (unsigned) (begin_info_ptr - section->buffer), |
5267 | bfd_get_filename (abfd)); | |
b4f54984 | 5268 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
5269 | } |
5270 | ||
a2ce51a0 DE |
5271 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5272 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5273 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5274 | to get it via circuitous means. Blech. */ | |
5275 | if (comp_dir != NULL) | |
5276 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5277 | ||
b0c7bfa9 DE |
5278 | /* Skip dummy compilation units. */ |
5279 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5280 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5281 | return 0; | |
5282 | ||
5283 | *result_info_ptr = info_ptr; | |
5284 | return 1; | |
5285 | } | |
5286 | ||
5287 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5288 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5289 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5290 | |
5291 | static struct dwo_unit * | |
5292 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5293 | struct die_info *comp_unit_die) | |
5294 | { | |
5295 | struct dwarf2_cu *cu = this_cu->cu; | |
5296 | struct attribute *attr; | |
5297 | ULONGEST signature; | |
5298 | struct dwo_unit *dwo_unit; | |
5299 | const char *comp_dir, *dwo_name; | |
5300 | ||
a2ce51a0 DE |
5301 | gdb_assert (cu != NULL); |
5302 | ||
b0c7bfa9 | 5303 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
5304 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5305 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
5306 | |
5307 | if (this_cu->is_debug_types) | |
5308 | { | |
5309 | struct signatured_type *sig_type; | |
5310 | ||
5311 | /* Since this_cu is the first member of struct signatured_type, | |
5312 | we can go from a pointer to one to a pointer to the other. */ | |
5313 | sig_type = (struct signatured_type *) this_cu; | |
5314 | signature = sig_type->signature; | |
5315 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5316 | } | |
5317 | else | |
5318 | { | |
5319 | struct attribute *attr; | |
5320 | ||
5321 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5322 | if (! attr) | |
5323 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5324 | " [in module %s]"), | |
4262abfb | 5325 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5326 | signature = DW_UNSND (attr); |
5327 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5328 | signature); | |
5329 | } | |
5330 | ||
b0c7bfa9 DE |
5331 | return dwo_unit; |
5332 | } | |
5333 | ||
a2ce51a0 | 5334 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5335 | See it for a description of the parameters. |
5336 | Read a TU directly from a DWO file, bypassing the stub. | |
5337 | ||
5338 | Note: This function could be a little bit simpler if we shared cleanups | |
5339 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5340 | to do, so we keep this function self-contained. Or we could move this | |
5341 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5342 | |
5343 | static void | |
6aa5f3a6 DE |
5344 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5345 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5346 | die_reader_func_ftype *die_reader_func, |
5347 | void *data) | |
5348 | { | |
5349 | struct dwarf2_cu *cu; | |
5350 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5351 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5352 | struct die_reader_specs reader; |
5353 | const gdb_byte *info_ptr; | |
5354 | struct die_info *comp_unit_die; | |
5355 | int has_children; | |
5356 | ||
5357 | /* Verify we can do the following downcast, and that we have the | |
5358 | data we need. */ | |
5359 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5360 | sig_type = (struct signatured_type *) this_cu; | |
5361 | gdb_assert (sig_type->dwo_unit != NULL); | |
5362 | ||
5363 | cleanups = make_cleanup (null_cleanup, NULL); | |
5364 | ||
6aa5f3a6 DE |
5365 | if (use_existing_cu && this_cu->cu != NULL) |
5366 | { | |
5367 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5368 | cu = this_cu->cu; | |
5369 | /* There's no need to do the rereading_dwo_cu handling that | |
5370 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5371 | } | |
5372 | else | |
5373 | { | |
5374 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5375 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5376 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
5377 | init_one_comp_unit (cu, this_cu); |
5378 | /* If an error occurs while loading, release our storage. */ | |
5379 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5380 | } | |
5381 | ||
5382 | /* A future optimization, if needed, would be to use an existing | |
5383 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5384 | could share abbrev tables. */ | |
a2ce51a0 DE |
5385 | |
5386 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5387 | 0 /* abbrev_table_provided */, | |
5388 | NULL /* stub_comp_unit_die */, | |
5389 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5390 | &reader, &info_ptr, | |
5391 | &comp_unit_die, &has_children) == 0) | |
5392 | { | |
5393 | /* Dummy die. */ | |
5394 | do_cleanups (cleanups); | |
5395 | return; | |
5396 | } | |
5397 | ||
5398 | /* All the "real" work is done here. */ | |
5399 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5400 | ||
6aa5f3a6 | 5401 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5402 | but the alternative is making the latter more complex. |
5403 | This function is only for the special case of using DWO files directly: | |
5404 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5405 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5406 | { |
6aa5f3a6 DE |
5407 | if (keep) |
5408 | { | |
5409 | /* We've successfully allocated this compilation unit. Let our | |
5410 | caller clean it up when finished with it. */ | |
5411 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5412 | |
6aa5f3a6 DE |
5413 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5414 | So we have to manually free the abbrev table. */ | |
5415 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5416 | |
6aa5f3a6 DE |
5417 | /* Link this CU into read_in_chain. */ |
5418 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5419 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5420 | } | |
5421 | else | |
5422 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5423 | } |
a2ce51a0 DE |
5424 | |
5425 | do_cleanups (cleanups); | |
5426 | } | |
5427 | ||
fd820528 | 5428 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5429 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5430 | |
f4dc4d17 DE |
5431 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5432 | Otherwise the table specified in the comp unit header is read in and used. | |
5433 | This is an optimization for when we already have the abbrev table. | |
5434 | ||
dee91e82 DE |
5435 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5436 | Otherwise, a new CU is allocated with xmalloc. | |
5437 | ||
5438 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5439 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5440 | ||
5441 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5442 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5443 | |
70221824 | 5444 | static void |
fd820528 | 5445 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5446 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5447 | int use_existing_cu, int keep, |
5448 | die_reader_func_ftype *die_reader_func, | |
5449 | void *data) | |
c906108c | 5450 | { |
dee91e82 | 5451 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5452 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5453 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5454 | struct dwarf2_cu *cu; |
d521ce57 | 5455 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5456 | struct die_reader_specs reader; |
d85a05f0 | 5457 | struct die_info *comp_unit_die; |
dee91e82 | 5458 | int has_children; |
d85a05f0 | 5459 | struct attribute *attr; |
365156ad | 5460 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5461 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5462 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5463 | /* Non-zero if CU currently points to a DWO file and we need to |
5464 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5465 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5466 | int rereading_dwo_cu = 0; |
c906108c | 5467 | |
b4f54984 | 5468 | if (dwarf_die_debug) |
09406207 DE |
5469 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5470 | this_cu->is_debug_types ? "type" : "comp", | |
5471 | this_cu->offset.sect_off); | |
5472 | ||
dee91e82 DE |
5473 | if (use_existing_cu) |
5474 | gdb_assert (keep); | |
23745b47 | 5475 | |
a2ce51a0 DE |
5476 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5477 | file (instead of going through the stub), short-circuit all of this. */ | |
5478 | if (this_cu->reading_dwo_directly) | |
5479 | { | |
5480 | /* Narrow down the scope of possibilities to have to understand. */ | |
5481 | gdb_assert (this_cu->is_debug_types); | |
5482 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5483 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5484 | die_reader_func, data); | |
a2ce51a0 DE |
5485 | return; |
5486 | } | |
5487 | ||
dee91e82 DE |
5488 | cleanups = make_cleanup (null_cleanup, NULL); |
5489 | ||
5490 | /* This is cheap if the section is already read in. */ | |
5491 | dwarf2_read_section (objfile, section); | |
5492 | ||
5493 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5494 | |
5495 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5496 | |
5497 | if (use_existing_cu && this_cu->cu != NULL) | |
5498 | { | |
5499 | cu = this_cu->cu; | |
42e7ad6c DE |
5500 | /* If this CU is from a DWO file we need to start over, we need to |
5501 | refetch the attributes from the skeleton CU. | |
5502 | This could be optimized by retrieving those attributes from when we | |
5503 | were here the first time: the previous comp_unit_die was stored in | |
5504 | comp_unit_obstack. But there's no data yet that we need this | |
5505 | optimization. */ | |
5506 | if (cu->dwo_unit != NULL) | |
5507 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5508 | } |
5509 | else | |
5510 | { | |
5511 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5512 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5513 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 5514 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 5515 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5516 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5517 | } |
dee91e82 | 5518 | |
b0c7bfa9 | 5519 | /* Get the header. */ |
42e7ad6c DE |
5520 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5521 | { | |
5522 | /* We already have the header, there's no need to read it in again. */ | |
5523 | info_ptr += cu->header.first_die_offset.cu_off; | |
5524 | } | |
5525 | else | |
5526 | { | |
3019eac3 | 5527 | if (this_cu->is_debug_types) |
dee91e82 DE |
5528 | { |
5529 | ULONGEST signature; | |
42e7ad6c | 5530 | cu_offset type_offset_in_tu; |
dee91e82 | 5531 | |
4bdcc0c1 DE |
5532 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5533 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5534 | &signature, |
5535 | &type_offset_in_tu); | |
dee91e82 | 5536 | |
42e7ad6c DE |
5537 | /* Since per_cu is the first member of struct signatured_type, |
5538 | we can go from a pointer to one to a pointer to the other. */ | |
5539 | sig_type = (struct signatured_type *) this_cu; | |
5540 | gdb_assert (sig_type->signature == signature); | |
5541 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5542 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5543 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5544 | ||
42e7ad6c DE |
5545 | /* LENGTH has not been set yet for type units if we're |
5546 | using .gdb_index. */ | |
1ce1cefd | 5547 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5548 | |
5549 | /* Establish the type offset that can be used to lookup the type. */ | |
5550 | sig_type->type_offset_in_section.sect_off = | |
5551 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5552 | } |
5553 | else | |
5554 | { | |
4bdcc0c1 DE |
5555 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5556 | abbrev_section, | |
5557 | info_ptr, 0); | |
dee91e82 DE |
5558 | |
5559 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5560 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5561 | } |
5562 | } | |
10b3939b | 5563 | |
6caca83c | 5564 | /* Skip dummy compilation units. */ |
dee91e82 | 5565 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5566 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5567 | { | |
dee91e82 | 5568 | do_cleanups (cleanups); |
21b2bd31 | 5569 | return; |
6caca83c CC |
5570 | } |
5571 | ||
433df2d4 DE |
5572 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5573 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5574 | done. Note that it's important that if the CU had an abbrev table |
5575 | on entry we don't free it when we're done: Somewhere up the call stack | |
5576 | it may be in use. */ | |
f4dc4d17 DE |
5577 | if (abbrev_table != NULL) |
5578 | { | |
5579 | gdb_assert (cu->abbrev_table == NULL); | |
5580 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5581 | == abbrev_table->offset.sect_off); | |
5582 | cu->abbrev_table = abbrev_table; | |
5583 | } | |
5584 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5585 | { |
4bdcc0c1 | 5586 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5587 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5588 | } | |
42e7ad6c DE |
5589 | else if (rereading_dwo_cu) |
5590 | { | |
5591 | dwarf2_free_abbrev_table (cu); | |
5592 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5593 | } | |
af703f96 | 5594 | |
dee91e82 | 5595 | /* Read the top level CU/TU die. */ |
3019eac3 | 5596 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5597 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5598 | |
b0c7bfa9 DE |
5599 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5600 | from the DWO file. | |
5601 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5602 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5603 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5604 | if (attr) | |
5605 | { | |
3019eac3 | 5606 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5607 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5608 | |
5609 | if (has_children) | |
6a506a2d DE |
5610 | { |
5611 | complaint (&symfile_complaints, | |
5612 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5613 | " has children (offset 0x%x) [in module %s]"), | |
5614 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5615 | } | |
b0c7bfa9 | 5616 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5617 | if (dwo_unit != NULL) |
3019eac3 | 5618 | { |
6a506a2d DE |
5619 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5620 | abbrev_table != NULL, | |
a2ce51a0 | 5621 | comp_unit_die, NULL, |
6a506a2d DE |
5622 | &reader, &info_ptr, |
5623 | &dwo_comp_unit_die, &has_children) == 0) | |
5624 | { | |
5625 | /* Dummy die. */ | |
5626 | do_cleanups (cleanups); | |
5627 | return; | |
5628 | } | |
5629 | comp_unit_die = dwo_comp_unit_die; | |
5630 | } | |
5631 | else | |
5632 | { | |
5633 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5634 | the stub. A complaint has already been logged. There's | |
5635 | not much more we can do except pass on the stub DIE to | |
5636 | die_reader_func. We don't want to throw an error on bad | |
5637 | debug info. */ | |
3019eac3 DE |
5638 | } |
5639 | } | |
5640 | ||
b0c7bfa9 | 5641 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5642 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5643 | ||
b0c7bfa9 | 5644 | /* Done, clean up. */ |
365156ad | 5645 | if (free_cu_cleanup != NULL) |
348e048f | 5646 | { |
365156ad TT |
5647 | if (keep) |
5648 | { | |
5649 | /* We've successfully allocated this compilation unit. Let our | |
5650 | caller clean it up when finished with it. */ | |
5651 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5652 | |
365156ad TT |
5653 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5654 | So we have to manually free the abbrev table. */ | |
5655 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5656 | |
365156ad TT |
5657 | /* Link this CU into read_in_chain. */ |
5658 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5659 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5660 | } | |
5661 | else | |
5662 | do_cleanups (free_cu_cleanup); | |
348e048f | 5663 | } |
365156ad TT |
5664 | |
5665 | do_cleanups (cleanups); | |
dee91e82 DE |
5666 | } |
5667 | ||
33e80786 DE |
5668 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5669 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5670 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5671 | |
5672 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5673 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5674 | |
5675 | We fill in THIS_CU->length. | |
5676 | ||
5677 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5678 | linker) then DIE_READER_FUNC will not get called. | |
5679 | ||
5680 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5681 | This is done in order to not leave THIS_CU->cu in a state where we have |
5682 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5683 | |
5684 | static void | |
5685 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5686 | struct dwo_file *dwo_file, |
dee91e82 DE |
5687 | die_reader_func_ftype *die_reader_func, |
5688 | void *data) | |
5689 | { | |
5690 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5691 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5692 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5693 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5694 | struct dwarf2_cu cu; |
d521ce57 | 5695 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5696 | struct die_reader_specs reader; |
5697 | struct cleanup *cleanups; | |
5698 | struct die_info *comp_unit_die; | |
5699 | int has_children; | |
5700 | ||
b4f54984 | 5701 | if (dwarf_die_debug) |
09406207 DE |
5702 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5703 | this_cu->is_debug_types ? "type" : "comp", | |
5704 | this_cu->offset.sect_off); | |
5705 | ||
dee91e82 DE |
5706 | gdb_assert (this_cu->cu == NULL); |
5707 | ||
33e80786 DE |
5708 | abbrev_section = (dwo_file != NULL |
5709 | ? &dwo_file->sections.abbrev | |
5710 | : get_abbrev_section_for_cu (this_cu)); | |
5711 | ||
dee91e82 DE |
5712 | /* This is cheap if the section is already read in. */ |
5713 | dwarf2_read_section (objfile, section); | |
5714 | ||
5715 | init_one_comp_unit (&cu, this_cu); | |
5716 | ||
5717 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5718 | ||
5719 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5720 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5721 | abbrev_section, info_ptr, | |
3019eac3 | 5722 | this_cu->is_debug_types); |
dee91e82 | 5723 | |
1ce1cefd | 5724 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5725 | |
5726 | /* Skip dummy compilation units. */ | |
5727 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5728 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5729 | { |
dee91e82 | 5730 | do_cleanups (cleanups); |
21b2bd31 | 5731 | return; |
93311388 | 5732 | } |
72bf9492 | 5733 | |
dee91e82 DE |
5734 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5735 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5736 | ||
3019eac3 | 5737 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5738 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5739 | ||
5740 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5741 | ||
5742 | do_cleanups (cleanups); | |
5743 | } | |
5744 | ||
3019eac3 DE |
5745 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5746 | does not lookup the specified DWO file. | |
5747 | This cannot be used to read DWO files. | |
dee91e82 DE |
5748 | |
5749 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5750 | This is done in order to not leave THIS_CU->cu in a state where we have |
5751 | to care whether it refers to the "main" CU or the DWO CU. | |
5752 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5753 | |
5754 | static void | |
5755 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5756 | die_reader_func_ftype *die_reader_func, | |
5757 | void *data) | |
5758 | { | |
33e80786 | 5759 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5760 | } |
0018ea6f DE |
5761 | \f |
5762 | /* Type Unit Groups. | |
dee91e82 | 5763 | |
0018ea6f DE |
5764 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5765 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5766 | so that all types coming from the same compilation (.o file) are grouped | |
5767 | together. A future step could be to put the types in the same symtab as | |
5768 | the CU the types ultimately came from. */ | |
ff013f42 | 5769 | |
f4dc4d17 DE |
5770 | static hashval_t |
5771 | hash_type_unit_group (const void *item) | |
5772 | { | |
9a3c8263 SM |
5773 | const struct type_unit_group *tu_group |
5774 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 5775 | |
094b34ac | 5776 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5777 | } |
348e048f DE |
5778 | |
5779 | static int | |
f4dc4d17 | 5780 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5781 | { |
9a3c8263 SM |
5782 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
5783 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 5784 | |
094b34ac | 5785 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5786 | } |
348e048f | 5787 | |
f4dc4d17 DE |
5788 | /* Allocate a hash table for type unit groups. */ |
5789 | ||
5790 | static htab_t | |
5791 | allocate_type_unit_groups_table (void) | |
5792 | { | |
5793 | return htab_create_alloc_ex (3, | |
5794 | hash_type_unit_group, | |
5795 | eq_type_unit_group, | |
5796 | NULL, | |
5797 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5798 | hashtab_obstack_allocate, | |
5799 | dummy_obstack_deallocate); | |
5800 | } | |
dee91e82 | 5801 | |
f4dc4d17 DE |
5802 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5803 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5804 | of any one psymtab grow too big. */ | |
5805 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5806 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5807 | |
094b34ac | 5808 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5809 | Create the type_unit_group object used to hold one or more TUs. */ |
5810 | ||
5811 | static struct type_unit_group * | |
094b34ac | 5812 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5813 | { |
5814 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5815 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5816 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5817 | |
5818 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5819 | struct type_unit_group); | |
094b34ac | 5820 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5821 | per_cu->objfile = objfile; |
f4dc4d17 | 5822 | |
094b34ac DE |
5823 | if (dwarf2_per_objfile->using_index) |
5824 | { | |
5825 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5826 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5827 | } |
5828 | else | |
5829 | { | |
5830 | unsigned int line_offset = line_offset_struct.sect_off; | |
5831 | struct partial_symtab *pst; | |
5832 | char *name; | |
5833 | ||
5834 | /* Give the symtab a useful name for debug purposes. */ | |
5835 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5836 | name = xstrprintf ("<type_units_%d>", | |
5837 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5838 | else | |
5839 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5840 | ||
5841 | pst = create_partial_symtab (per_cu, name); | |
5842 | pst->anonymous = 1; | |
f4dc4d17 | 5843 | |
094b34ac DE |
5844 | xfree (name); |
5845 | } | |
f4dc4d17 | 5846 | |
094b34ac DE |
5847 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5848 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5849 | |
5850 | return tu_group; | |
5851 | } | |
5852 | ||
094b34ac DE |
5853 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5854 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5855 | |
5856 | static struct type_unit_group * | |
ff39bb5e | 5857 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5858 | { |
5859 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5860 | struct type_unit_group *tu_group; | |
5861 | void **slot; | |
5862 | unsigned int line_offset; | |
5863 | struct type_unit_group type_unit_group_for_lookup; | |
5864 | ||
5865 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5866 | { | |
5867 | dwarf2_per_objfile->type_unit_groups = | |
5868 | allocate_type_unit_groups_table (); | |
5869 | } | |
5870 | ||
5871 | /* Do we need to create a new group, or can we use an existing one? */ | |
5872 | ||
5873 | if (stmt_list) | |
5874 | { | |
5875 | line_offset = DW_UNSND (stmt_list); | |
5876 | ++tu_stats->nr_symtab_sharers; | |
5877 | } | |
5878 | else | |
5879 | { | |
5880 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5881 | We can do various things here like create one group per TU or | |
5882 | spread them over multiple groups to split up the expansion work. | |
5883 | To avoid worst case scenarios (too many groups or too large groups) | |
5884 | we, umm, group them in bunches. */ | |
5885 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5886 | | (tu_stats->nr_stmt_less_type_units | |
5887 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5888 | ++tu_stats->nr_stmt_less_type_units; | |
5889 | } | |
5890 | ||
094b34ac DE |
5891 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5892 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5893 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5894 | &type_unit_group_for_lookup, INSERT); | |
5895 | if (*slot != NULL) | |
5896 | { | |
9a3c8263 | 5897 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
5898 | gdb_assert (tu_group != NULL); |
5899 | } | |
5900 | else | |
5901 | { | |
5902 | sect_offset line_offset_struct; | |
5903 | ||
5904 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5905 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5906 | *slot = tu_group; |
5907 | ++tu_stats->nr_symtabs; | |
5908 | } | |
5909 | ||
5910 | return tu_group; | |
5911 | } | |
0018ea6f DE |
5912 | \f |
5913 | /* Partial symbol tables. */ | |
5914 | ||
5915 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5916 | ||
5917 | The caller must fill in the following details: | |
5918 | dirname, textlow, texthigh. */ | |
5919 | ||
5920 | static struct partial_symtab * | |
5921 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5922 | { | |
5923 | struct objfile *objfile = per_cu->objfile; | |
5924 | struct partial_symtab *pst; | |
5925 | ||
18a94d75 | 5926 | pst = start_psymtab_common (objfile, name, 0, |
0018ea6f DE |
5927 | objfile->global_psymbols.next, |
5928 | objfile->static_psymbols.next); | |
5929 | ||
5930 | pst->psymtabs_addrmap_supported = 1; | |
5931 | ||
5932 | /* This is the glue that links PST into GDB's symbol API. */ | |
5933 | pst->read_symtab_private = per_cu; | |
5934 | pst->read_symtab = dwarf2_read_symtab; | |
5935 | per_cu->v.psymtab = pst; | |
5936 | ||
5937 | return pst; | |
5938 | } | |
5939 | ||
b93601f3 TT |
5940 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5941 | type. */ | |
5942 | ||
5943 | struct process_psymtab_comp_unit_data | |
5944 | { | |
5945 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5946 | ||
5947 | int want_partial_unit; | |
5948 | ||
5949 | /* The "pretend" language that is used if the CU doesn't declare a | |
5950 | language. */ | |
5951 | ||
5952 | enum language pretend_language; | |
5953 | }; | |
5954 | ||
0018ea6f DE |
5955 | /* die_reader_func for process_psymtab_comp_unit. */ |
5956 | ||
5957 | static void | |
5958 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5959 | const gdb_byte *info_ptr, |
0018ea6f DE |
5960 | struct die_info *comp_unit_die, |
5961 | int has_children, | |
5962 | void *data) | |
5963 | { | |
5964 | struct dwarf2_cu *cu = reader->cu; | |
5965 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 5966 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 5967 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
5968 | CORE_ADDR baseaddr; |
5969 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5970 | struct partial_symtab *pst; | |
3a2b436a | 5971 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 5972 | const char *filename; |
9a3c8263 SM |
5973 | struct process_psymtab_comp_unit_data *info |
5974 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 5975 | |
b93601f3 | 5976 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
5977 | return; |
5978 | ||
5979 | gdb_assert (! per_cu->is_debug_types); | |
5980 | ||
b93601f3 | 5981 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
5982 | |
5983 | cu->list_in_scope = &file_symbols; | |
5984 | ||
5985 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
5986 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
5987 | if (filename == NULL) | |
0018ea6f | 5988 | filename = ""; |
0018ea6f DE |
5989 | |
5990 | pst = create_partial_symtab (per_cu, filename); | |
5991 | ||
5992 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 5993 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
5994 | |
5995 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5996 | ||
5997 | dwarf2_find_base_address (comp_unit_die, cu); | |
5998 | ||
5999 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6000 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6001 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6002 | &best_highpc, cu, pst); | |
6003 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6004 | /* Store the contiguous range if it is not empty; it can be empty for |
6005 | CUs with no code. */ | |
6006 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6007 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6008 | best_lowpc + baseaddr), | |
6009 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6010 | best_highpc + baseaddr) - 1, | |
6011 | pst); | |
0018ea6f DE |
6012 | |
6013 | /* Check if comp unit has_children. | |
6014 | If so, read the rest of the partial symbols from this comp unit. | |
6015 | If not, there's no more debug_info for this comp unit. */ | |
6016 | if (has_children) | |
6017 | { | |
6018 | struct partial_die_info *first_die; | |
6019 | CORE_ADDR lowpc, highpc; | |
6020 | ||
6021 | lowpc = ((CORE_ADDR) -1); | |
6022 | highpc = ((CORE_ADDR) 0); | |
6023 | ||
6024 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6025 | ||
6026 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6027 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6028 | |
6029 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6030 | complaints from `maint check'. */ | |
6031 | if (lowpc == ((CORE_ADDR) -1)) | |
6032 | lowpc = highpc; | |
6033 | ||
6034 | /* If the compilation unit didn't have an explicit address range, | |
6035 | then use the information extracted from its child dies. */ | |
e385593e | 6036 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6037 | { |
6038 | best_lowpc = lowpc; | |
6039 | best_highpc = highpc; | |
6040 | } | |
6041 | } | |
3e29f34a MR |
6042 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6043 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6044 | |
8763cede | 6045 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6046 | |
6047 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6048 | { | |
6049 | int i; | |
6050 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6051 | struct dwarf2_per_cu_data *iter; | |
6052 | ||
6053 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6054 | post-pass. */ | |
6055 | pst->number_of_dependencies = len; | |
8d749320 SM |
6056 | pst->dependencies = |
6057 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6058 | for (i = 0; |
6059 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6060 | i, iter); | |
6061 | ++i) | |
6062 | pst->dependencies[i] = iter->v.psymtab; | |
6063 | ||
6064 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6065 | } | |
6066 | ||
6067 | /* Get the list of files included in the current compilation unit, | |
6068 | and build a psymtab for each of them. */ | |
6069 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6070 | ||
b4f54984 | 6071 | if (dwarf_read_debug) |
0018ea6f DE |
6072 | { |
6073 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6074 | ||
6075 | fprintf_unfiltered (gdb_stdlog, | |
6076 | "Psymtab for %s unit @0x%x: %s - %s" | |
6077 | ", %d global, %d static syms\n", | |
6078 | per_cu->is_debug_types ? "type" : "comp", | |
6079 | per_cu->offset.sect_off, | |
6080 | paddress (gdbarch, pst->textlow), | |
6081 | paddress (gdbarch, pst->texthigh), | |
6082 | pst->n_global_syms, pst->n_static_syms); | |
6083 | } | |
6084 | } | |
6085 | ||
6086 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6087 | Process compilation unit THIS_CU for a psymtab. */ | |
6088 | ||
6089 | static void | |
6090 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6091 | int want_partial_unit, |
6092 | enum language pretend_language) | |
0018ea6f | 6093 | { |
b93601f3 TT |
6094 | struct process_psymtab_comp_unit_data info; |
6095 | ||
0018ea6f DE |
6096 | /* If this compilation unit was already read in, free the |
6097 | cached copy in order to read it in again. This is | |
6098 | necessary because we skipped some symbols when we first | |
6099 | read in the compilation unit (see load_partial_dies). | |
6100 | This problem could be avoided, but the benefit is unclear. */ | |
6101 | if (this_cu->cu != NULL) | |
6102 | free_one_cached_comp_unit (this_cu); | |
6103 | ||
6104 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
6105 | info.want_partial_unit = want_partial_unit; |
6106 | info.pretend_language = pretend_language; | |
0018ea6f DE |
6107 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
6108 | process_psymtab_comp_unit_reader, | |
b93601f3 | 6109 | &info); |
0018ea6f DE |
6110 | |
6111 | /* Age out any secondary CUs. */ | |
6112 | age_cached_comp_units (); | |
6113 | } | |
f4dc4d17 DE |
6114 | |
6115 | /* Reader function for build_type_psymtabs. */ | |
6116 | ||
6117 | static void | |
6118 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6119 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6120 | struct die_info *type_unit_die, |
6121 | int has_children, | |
6122 | void *data) | |
6123 | { | |
6124 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6125 | struct dwarf2_cu *cu = reader->cu; | |
6126 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6127 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6128 | struct type_unit_group *tu_group; |
6129 | struct attribute *attr; | |
6130 | struct partial_die_info *first_die; | |
6131 | CORE_ADDR lowpc, highpc; | |
6132 | struct partial_symtab *pst; | |
6133 | ||
6134 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6135 | gdb_assert (per_cu->is_debug_types); |
6136 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6137 | |
6138 | if (! has_children) | |
6139 | return; | |
6140 | ||
6141 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6142 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6143 | |
0186c6a7 | 6144 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6145 | |
6146 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6147 | cu->list_in_scope = &file_symbols; | |
6148 | pst = create_partial_symtab (per_cu, ""); | |
6149 | pst->anonymous = 1; | |
6150 | ||
6151 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6152 | ||
6153 | lowpc = (CORE_ADDR) -1; | |
6154 | highpc = (CORE_ADDR) 0; | |
6155 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6156 | ||
8763cede | 6157 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6158 | } |
6159 | ||
73051182 DE |
6160 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6161 | ||
6162 | struct tu_abbrev_offset | |
6163 | { | |
6164 | struct signatured_type *sig_type; | |
6165 | sect_offset abbrev_offset; | |
6166 | }; | |
6167 | ||
6168 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6169 | ||
6170 | static int | |
6171 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6172 | { | |
9a3c8263 SM |
6173 | const struct tu_abbrev_offset * const *a |
6174 | = (const struct tu_abbrev_offset * const*) ap; | |
6175 | const struct tu_abbrev_offset * const *b | |
6176 | = (const struct tu_abbrev_offset * const*) bp; | |
73051182 DE |
6177 | unsigned int aoff = (*a)->abbrev_offset.sect_off; |
6178 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
6179 | ||
6180 | return (aoff > boff) - (aoff < boff); | |
6181 | } | |
6182 | ||
6183 | /* Efficiently read all the type units. | |
6184 | This does the bulk of the work for build_type_psymtabs. | |
6185 | ||
6186 | The efficiency is because we sort TUs by the abbrev table they use and | |
6187 | only read each abbrev table once. In one program there are 200K TUs | |
6188 | sharing 8K abbrev tables. | |
6189 | ||
6190 | The main purpose of this function is to support building the | |
6191 | dwarf2_per_objfile->type_unit_groups table. | |
6192 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6193 | can collapse the search space by grouping them by stmt_list. | |
6194 | The savings can be significant, in the same program from above the 200K TUs | |
6195 | share 8K stmt_list tables. | |
6196 | ||
6197 | FUNC is expected to call get_type_unit_group, which will create the | |
6198 | struct type_unit_group if necessary and add it to | |
6199 | dwarf2_per_objfile->type_unit_groups. */ | |
6200 | ||
6201 | static void | |
6202 | build_type_psymtabs_1 (void) | |
6203 | { | |
73051182 DE |
6204 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
6205 | struct cleanup *cleanups; | |
6206 | struct abbrev_table *abbrev_table; | |
6207 | sect_offset abbrev_offset; | |
6208 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
6209 | int i; |
6210 | ||
6211 | /* It's up to the caller to not call us multiple times. */ | |
6212 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6213 | ||
6214 | if (dwarf2_per_objfile->n_type_units == 0) | |
6215 | return; | |
6216 | ||
6217 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6218 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6219 | read each abbrev table in. | |
6220 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6221 | This is simpler and efficient enough for now. | |
6222 | ||
6223 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6224 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6225 | stmt_list value too so in practice this should work well. | |
6226 | ||
6227 | The basic algorithm here is: | |
6228 | ||
6229 | sort TUs by abbrev table | |
6230 | for each TU with same abbrev table: | |
6231 | read abbrev table if first user | |
6232 | read TU top level DIE | |
6233 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6234 | call FUNC */ | |
6235 | ||
b4f54984 | 6236 | if (dwarf_read_debug) |
73051182 DE |
6237 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
6238 | ||
6239 | /* Sort in a separate table to maintain the order of all_type_units | |
6240 | for .gdb_index: TU indices directly index all_type_units. */ | |
6241 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6242 | dwarf2_per_objfile->n_type_units); | |
6243 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6244 | { | |
6245 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6246 | ||
6247 | sorted_by_abbrev[i].sig_type = sig_type; | |
6248 | sorted_by_abbrev[i].abbrev_offset = | |
6249 | read_abbrev_offset (sig_type->per_cu.section, | |
6250 | sig_type->per_cu.offset); | |
6251 | } | |
6252 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6253 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6254 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6255 | ||
6256 | abbrev_offset.sect_off = ~(unsigned) 0; | |
6257 | abbrev_table = NULL; | |
6258 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6259 | ||
6260 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6261 | { | |
6262 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6263 | ||
6264 | /* Switch to the next abbrev table if necessary. */ | |
6265 | if (abbrev_table == NULL | |
6266 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
6267 | { | |
6268 | if (abbrev_table != NULL) | |
6269 | { | |
6270 | abbrev_table_free (abbrev_table); | |
6271 | /* Reset to NULL in case abbrev_table_read_table throws | |
6272 | an error: abbrev_table_free_cleanup will get called. */ | |
6273 | abbrev_table = NULL; | |
6274 | } | |
6275 | abbrev_offset = tu->abbrev_offset; | |
6276 | abbrev_table = | |
6277 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6278 | abbrev_offset); | |
6279 | ++tu_stats->nr_uniq_abbrev_tables; | |
6280 | } | |
6281 | ||
6282 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6283 | build_type_psymtabs_reader, NULL); | |
6284 | } | |
6285 | ||
73051182 | 6286 | do_cleanups (cleanups); |
6aa5f3a6 | 6287 | } |
73051182 | 6288 | |
6aa5f3a6 DE |
6289 | /* Print collected type unit statistics. */ |
6290 | ||
6291 | static void | |
6292 | print_tu_stats (void) | |
6293 | { | |
6294 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6295 | ||
6296 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6297 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6298 | dwarf2_per_objfile->n_type_units); | |
6299 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6300 | tu_stats->nr_uniq_abbrev_tables); | |
6301 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6302 | tu_stats->nr_symtabs); | |
6303 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6304 | tu_stats->nr_symtab_sharers); | |
6305 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6306 | tu_stats->nr_stmt_less_type_units); | |
6307 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6308 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6309 | } |
6310 | ||
f4dc4d17 DE |
6311 | /* Traversal function for build_type_psymtabs. */ |
6312 | ||
6313 | static int | |
6314 | build_type_psymtab_dependencies (void **slot, void *info) | |
6315 | { | |
6316 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6317 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6318 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6319 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6320 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6321 | struct signatured_type *iter; | |
f4dc4d17 DE |
6322 | int i; |
6323 | ||
6324 | gdb_assert (len > 0); | |
0186c6a7 | 6325 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6326 | |
6327 | pst->number_of_dependencies = len; | |
8d749320 SM |
6328 | pst->dependencies = |
6329 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 6330 | for (i = 0; |
0186c6a7 | 6331 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6332 | ++i) |
6333 | { | |
0186c6a7 DE |
6334 | gdb_assert (iter->per_cu.is_debug_types); |
6335 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6336 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6337 | } |
6338 | ||
0186c6a7 | 6339 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6340 | |
6341 | return 1; | |
6342 | } | |
6343 | ||
6344 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6345 | Build partial symbol tables for the .debug_types comp-units. */ | |
6346 | ||
6347 | static void | |
6348 | build_type_psymtabs (struct objfile *objfile) | |
6349 | { | |
0e50663e | 6350 | if (! create_all_type_units (objfile)) |
348e048f DE |
6351 | return; |
6352 | ||
73051182 | 6353 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6354 | } |
f4dc4d17 | 6355 | |
6aa5f3a6 DE |
6356 | /* Traversal function for process_skeletonless_type_unit. |
6357 | Read a TU in a DWO file and build partial symbols for it. */ | |
6358 | ||
6359 | static int | |
6360 | process_skeletonless_type_unit (void **slot, void *info) | |
6361 | { | |
6362 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 6363 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
6364 | struct signatured_type find_entry, *entry; |
6365 | ||
6366 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6367 | ||
6368 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6369 | { | |
6370 | dwarf2_per_objfile->signatured_types | |
6371 | = allocate_signatured_type_table (objfile); | |
6372 | } | |
6373 | ||
6374 | find_entry.signature = dwo_unit->signature; | |
6375 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6376 | INSERT); | |
6377 | /* If we've already seen this type there's nothing to do. What's happening | |
6378 | is we're doing our own version of comdat-folding here. */ | |
6379 | if (*slot != NULL) | |
6380 | return 1; | |
6381 | ||
6382 | /* This does the job that create_all_type_units would have done for | |
6383 | this TU. */ | |
6384 | entry = add_type_unit (dwo_unit->signature, slot); | |
6385 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6386 | *slot = entry; | |
6387 | ||
6388 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6389 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6390 | build_type_psymtabs_reader, NULL); | |
6391 | ||
6392 | return 1; | |
6393 | } | |
6394 | ||
6395 | /* Traversal function for process_skeletonless_type_units. */ | |
6396 | ||
6397 | static int | |
6398 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6399 | { | |
6400 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6401 | ||
6402 | if (dwo_file->tus != NULL) | |
6403 | { | |
6404 | htab_traverse_noresize (dwo_file->tus, | |
6405 | process_skeletonless_type_unit, info); | |
6406 | } | |
6407 | ||
6408 | return 1; | |
6409 | } | |
6410 | ||
6411 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6412 | This is needed in case a TU was emitted without its skeleton. | |
6413 | Note: This can't be done until we know what all the DWO files are. */ | |
6414 | ||
6415 | static void | |
6416 | process_skeletonless_type_units (struct objfile *objfile) | |
6417 | { | |
6418 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6419 | if (get_dwp_file () == NULL | |
6420 | && dwarf2_per_objfile->dwo_files != NULL) | |
6421 | { | |
6422 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6423 | process_dwo_file_for_skeletonless_type_units, | |
6424 | objfile); | |
6425 | } | |
348e048f DE |
6426 | } |
6427 | ||
60606b2c TT |
6428 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6429 | ||
6430 | static void | |
6431 | psymtabs_addrmap_cleanup (void *o) | |
6432 | { | |
9a3c8263 | 6433 | struct objfile *objfile = (struct objfile *) o; |
ec61707d | 6434 | |
60606b2c TT |
6435 | objfile->psymtabs_addrmap = NULL; |
6436 | } | |
6437 | ||
95554aad TT |
6438 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6439 | ||
6440 | static void | |
6441 | set_partial_user (struct objfile *objfile) | |
6442 | { | |
6443 | int i; | |
6444 | ||
6445 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6446 | { | |
8832e7e3 | 6447 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6448 | struct partial_symtab *pst = per_cu->v.psymtab; |
6449 | int j; | |
6450 | ||
36586728 TT |
6451 | if (pst == NULL) |
6452 | continue; | |
6453 | ||
95554aad TT |
6454 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6455 | { | |
6456 | /* Set the 'user' field only if it is not already set. */ | |
6457 | if (pst->dependencies[j]->user == NULL) | |
6458 | pst->dependencies[j]->user = pst; | |
6459 | } | |
6460 | } | |
6461 | } | |
6462 | ||
93311388 DE |
6463 | /* Build the partial symbol table by doing a quick pass through the |
6464 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6465 | |
93311388 | 6466 | static void |
c67a9c90 | 6467 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6468 | { |
60606b2c TT |
6469 | struct cleanup *back_to, *addrmap_cleanup; |
6470 | struct obstack temp_obstack; | |
21b2bd31 | 6471 | int i; |
93311388 | 6472 | |
b4f54984 | 6473 | if (dwarf_read_debug) |
45cfd468 DE |
6474 | { |
6475 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6476 | objfile_name (objfile)); |
45cfd468 DE |
6477 | } |
6478 | ||
98bfdba5 PA |
6479 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6480 | ||
be391dca | 6481 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6482 | |
93311388 DE |
6483 | /* Any cached compilation units will be linked by the per-objfile |
6484 | read_in_chain. Make sure to free them when we're done. */ | |
6485 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6486 | |
348e048f DE |
6487 | build_type_psymtabs (objfile); |
6488 | ||
93311388 | 6489 | create_all_comp_units (objfile); |
c906108c | 6490 | |
60606b2c TT |
6491 | /* Create a temporary address map on a temporary obstack. We later |
6492 | copy this to the final obstack. */ | |
6493 | obstack_init (&temp_obstack); | |
6494 | make_cleanup_obstack_free (&temp_obstack); | |
6495 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6496 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6497 | |
21b2bd31 | 6498 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6499 | { |
8832e7e3 | 6500 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6501 | |
b93601f3 | 6502 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6503 | } |
ff013f42 | 6504 | |
6aa5f3a6 DE |
6505 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6506 | process_skeletonless_type_units (objfile); | |
6507 | ||
6508 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6509 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6510 | { | |
6511 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6512 | build_type_psymtab_dependencies, NULL); | |
6513 | } | |
6514 | ||
b4f54984 | 6515 | if (dwarf_read_debug) |
6aa5f3a6 DE |
6516 | print_tu_stats (); |
6517 | ||
95554aad TT |
6518 | set_partial_user (objfile); |
6519 | ||
ff013f42 JK |
6520 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6521 | &objfile->objfile_obstack); | |
60606b2c | 6522 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6523 | |
ae038cb0 | 6524 | do_cleanups (back_to); |
45cfd468 | 6525 | |
b4f54984 | 6526 | if (dwarf_read_debug) |
45cfd468 | 6527 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 6528 | objfile_name (objfile)); |
ae038cb0 DJ |
6529 | } |
6530 | ||
3019eac3 | 6531 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6532 | |
6533 | static void | |
dee91e82 | 6534 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6535 | const gdb_byte *info_ptr, |
dee91e82 DE |
6536 | struct die_info *comp_unit_die, |
6537 | int has_children, | |
6538 | void *data) | |
ae038cb0 | 6539 | { |
dee91e82 | 6540 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6541 | |
95554aad | 6542 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6543 | |
ae038cb0 DJ |
6544 | /* Check if comp unit has_children. |
6545 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6546 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6547 | if (has_children) |
dee91e82 DE |
6548 | load_partial_dies (reader, info_ptr, 0); |
6549 | } | |
98bfdba5 | 6550 | |
dee91e82 DE |
6551 | /* Load the partial DIEs for a secondary CU into memory. |
6552 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6553 | |
dee91e82 DE |
6554 | static void |
6555 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6556 | { | |
f4dc4d17 DE |
6557 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6558 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6559 | } |
6560 | ||
ae038cb0 | 6561 | static void |
36586728 TT |
6562 | read_comp_units_from_section (struct objfile *objfile, |
6563 | struct dwarf2_section_info *section, | |
6564 | unsigned int is_dwz, | |
6565 | int *n_allocated, | |
6566 | int *n_comp_units, | |
6567 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6568 | { |
d521ce57 | 6569 | const gdb_byte *info_ptr; |
a32a8923 | 6570 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6571 | |
b4f54984 | 6572 | if (dwarf_read_debug) |
bf6af496 | 6573 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
6574 | get_section_name (section), |
6575 | get_section_file_name (section)); | |
bf6af496 | 6576 | |
36586728 | 6577 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6578 | |
36586728 | 6579 | info_ptr = section->buffer; |
6e70227d | 6580 | |
36586728 | 6581 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6582 | { |
c764a876 | 6583 | unsigned int length, initial_length_size; |
ae038cb0 | 6584 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6585 | sect_offset offset; |
ae038cb0 | 6586 | |
36586728 | 6587 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6588 | |
6589 | /* Read just enough information to find out where the next | |
6590 | compilation unit is. */ | |
36586728 | 6591 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6592 | |
6593 | /* Save the compilation unit for later lookup. */ | |
8d749320 | 6594 | this_cu = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_cu_data); |
ae038cb0 DJ |
6595 | memset (this_cu, 0, sizeof (*this_cu)); |
6596 | this_cu->offset = offset; | |
c764a876 | 6597 | this_cu->length = length + initial_length_size; |
36586728 | 6598 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6599 | this_cu->objfile = objfile; |
8a0459fd | 6600 | this_cu->section = section; |
ae038cb0 | 6601 | |
36586728 | 6602 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6603 | { |
36586728 | 6604 | *n_allocated *= 2; |
224c3ddb SM |
6605 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
6606 | *all_comp_units, *n_allocated); | |
ae038cb0 | 6607 | } |
36586728 TT |
6608 | (*all_comp_units)[*n_comp_units] = this_cu; |
6609 | ++*n_comp_units; | |
ae038cb0 DJ |
6610 | |
6611 | info_ptr = info_ptr + this_cu->length; | |
6612 | } | |
36586728 TT |
6613 | } |
6614 | ||
6615 | /* Create a list of all compilation units in OBJFILE. | |
6616 | This is only done for -readnow and building partial symtabs. */ | |
6617 | ||
6618 | static void | |
6619 | create_all_comp_units (struct objfile *objfile) | |
6620 | { | |
6621 | int n_allocated; | |
6622 | int n_comp_units; | |
6623 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6624 | struct dwz_file *dwz; |
36586728 TT |
6625 | |
6626 | n_comp_units = 0; | |
6627 | n_allocated = 10; | |
8d749320 | 6628 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 TT |
6629 | |
6630 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6631 | &n_allocated, &n_comp_units, &all_comp_units); | |
6632 | ||
4db1a1dc TT |
6633 | dwz = dwarf2_get_dwz_file (); |
6634 | if (dwz != NULL) | |
6635 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6636 | &n_allocated, &n_comp_units, | |
6637 | &all_comp_units); | |
ae038cb0 | 6638 | |
8d749320 SM |
6639 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
6640 | struct dwarf2_per_cu_data *, | |
6641 | n_comp_units); | |
ae038cb0 DJ |
6642 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
6643 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6644 | xfree (all_comp_units); | |
6645 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6646 | } |
6647 | ||
5734ee8b | 6648 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6649 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6650 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6651 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6652 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6653 | |
72bf9492 DJ |
6654 | static void |
6655 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6656 | CORE_ADDR *highpc, int set_addrmap, |
6657 | struct dwarf2_cu *cu) | |
c906108c | 6658 | { |
72bf9492 | 6659 | struct partial_die_info *pdi; |
c906108c | 6660 | |
91c24f0a DC |
6661 | /* Now, march along the PDI's, descending into ones which have |
6662 | interesting children but skipping the children of the other ones, | |
6663 | until we reach the end of the compilation unit. */ | |
c906108c | 6664 | |
72bf9492 | 6665 | pdi = first_die; |
91c24f0a | 6666 | |
72bf9492 DJ |
6667 | while (pdi != NULL) |
6668 | { | |
6669 | fixup_partial_die (pdi, cu); | |
c906108c | 6670 | |
f55ee35c | 6671 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6672 | children, so we need to look at them. Ditto for anonymous |
6673 | enums. */ | |
933c6fe4 | 6674 | |
72bf9492 | 6675 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6676 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6677 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6678 | { |
72bf9492 | 6679 | switch (pdi->tag) |
c906108c SS |
6680 | { |
6681 | case DW_TAG_subprogram: | |
cdc07690 | 6682 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6683 | break; |
72929c62 | 6684 | case DW_TAG_constant: |
c906108c SS |
6685 | case DW_TAG_variable: |
6686 | case DW_TAG_typedef: | |
91c24f0a | 6687 | case DW_TAG_union_type: |
72bf9492 | 6688 | if (!pdi->is_declaration) |
63d06c5c | 6689 | { |
72bf9492 | 6690 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6691 | } |
6692 | break; | |
c906108c | 6693 | case DW_TAG_class_type: |
680b30c7 | 6694 | case DW_TAG_interface_type: |
c906108c | 6695 | case DW_TAG_structure_type: |
72bf9492 | 6696 | if (!pdi->is_declaration) |
c906108c | 6697 | { |
72bf9492 | 6698 | add_partial_symbol (pdi, cu); |
c906108c | 6699 | } |
e98c9e7c TT |
6700 | if (cu->language == language_rust && pdi->has_children) |
6701 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
6702 | set_addrmap, cu); | |
c906108c | 6703 | break; |
91c24f0a | 6704 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6705 | if (!pdi->is_declaration) |
6706 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6707 | break; |
6708 | case DW_TAG_base_type: | |
a02abb62 | 6709 | case DW_TAG_subrange_type: |
c906108c | 6710 | /* File scope base type definitions are added to the partial |
c5aa993b | 6711 | symbol table. */ |
72bf9492 | 6712 | add_partial_symbol (pdi, cu); |
c906108c | 6713 | break; |
d9fa45fe | 6714 | case DW_TAG_namespace: |
cdc07690 | 6715 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6716 | break; |
5d7cb8df | 6717 | case DW_TAG_module: |
cdc07690 | 6718 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6719 | break; |
95554aad TT |
6720 | case DW_TAG_imported_unit: |
6721 | { | |
6722 | struct dwarf2_per_cu_data *per_cu; | |
6723 | ||
f4dc4d17 DE |
6724 | /* For now we don't handle imported units in type units. */ |
6725 | if (cu->per_cu->is_debug_types) | |
6726 | { | |
6727 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6728 | " supported in type units [in module %s]"), | |
4262abfb | 6729 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6730 | } |
6731 | ||
95554aad | 6732 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6733 | pdi->is_dwz, |
95554aad TT |
6734 | cu->objfile); |
6735 | ||
6736 | /* Go read the partial unit, if needed. */ | |
6737 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6738 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6739 | |
f4dc4d17 | 6740 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6741 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6742 | } |
6743 | break; | |
74921315 KS |
6744 | case DW_TAG_imported_declaration: |
6745 | add_partial_symbol (pdi, cu); | |
6746 | break; | |
c906108c SS |
6747 | default: |
6748 | break; | |
6749 | } | |
6750 | } | |
6751 | ||
72bf9492 DJ |
6752 | /* If the die has a sibling, skip to the sibling. */ |
6753 | ||
6754 | pdi = pdi->die_sibling; | |
6755 | } | |
6756 | } | |
6757 | ||
6758 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6759 | |
72bf9492 | 6760 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 6761 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
6762 | Enumerators are an exception; they use the scope of their parent |
6763 | enumeration type, i.e. the name of the enumeration type is not | |
6764 | prepended to the enumerator. | |
91c24f0a | 6765 | |
72bf9492 DJ |
6766 | There are two complexities. One is DW_AT_specification; in this |
6767 | case "parent" means the parent of the target of the specification, | |
6768 | instead of the direct parent of the DIE. The other is compilers | |
6769 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6770 | the fully qualified name of structure types from their members' | |
6771 | linkage names. This must be done using the DIE's children rather | |
6772 | than the children of any DW_AT_specification target. We only need | |
6773 | to do this for structures at the top level, i.e. if the target of | |
6774 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6775 | have a parent. */ | |
6776 | ||
6777 | /* Compute the scope prefix associated with PDI's parent, in | |
6778 | compilation unit CU. The result will be allocated on CU's | |
6779 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6780 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6781 | static const char * |
72bf9492 DJ |
6782 | partial_die_parent_scope (struct partial_die_info *pdi, |
6783 | struct dwarf2_cu *cu) | |
6784 | { | |
15d034d0 | 6785 | const char *grandparent_scope; |
72bf9492 | 6786 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6787 | |
72bf9492 DJ |
6788 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6789 | then this means the parent of the specification DIE. */ | |
6790 | ||
6791 | real_pdi = pdi; | |
72bf9492 | 6792 | while (real_pdi->has_specification) |
36586728 TT |
6793 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6794 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6795 | |
6796 | parent = real_pdi->die_parent; | |
6797 | if (parent == NULL) | |
6798 | return NULL; | |
6799 | ||
6800 | if (parent->scope_set) | |
6801 | return parent->scope; | |
6802 | ||
6803 | fixup_partial_die (parent, cu); | |
6804 | ||
10b3939b | 6805 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6806 | |
acebe513 UW |
6807 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6808 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6809 | Work around this problem here. */ | |
6810 | if (cu->language == language_cplus | |
6e70227d | 6811 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6812 | && strcmp (parent->name, "::") == 0 |
6813 | && grandparent_scope == NULL) | |
6814 | { | |
6815 | parent->scope = NULL; | |
6816 | parent->scope_set = 1; | |
6817 | return NULL; | |
6818 | } | |
6819 | ||
9c6c53f7 SA |
6820 | if (pdi->tag == DW_TAG_enumerator) |
6821 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6822 | parent->scope = grandparent_scope; | |
6823 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6824 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6825 | || parent->tag == DW_TAG_structure_type |
6826 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6827 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6828 | || parent->tag == DW_TAG_union_type |
6829 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6830 | { |
6831 | if (grandparent_scope == NULL) | |
6832 | parent->scope = parent->name; | |
6833 | else | |
3e43a32a MS |
6834 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6835 | grandparent_scope, | |
f55ee35c | 6836 | parent->name, 0, cu); |
72bf9492 | 6837 | } |
72bf9492 DJ |
6838 | else |
6839 | { | |
6840 | /* FIXME drow/2004-04-01: What should we be doing with | |
6841 | function-local names? For partial symbols, we should probably be | |
6842 | ignoring them. */ | |
6843 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6844 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6845 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6846 | parent->scope = grandparent_scope; |
c906108c SS |
6847 | } |
6848 | ||
72bf9492 DJ |
6849 | parent->scope_set = 1; |
6850 | return parent->scope; | |
6851 | } | |
6852 | ||
6853 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6854 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6855 | |
72bf9492 DJ |
6856 | static char * |
6857 | partial_die_full_name (struct partial_die_info *pdi, | |
6858 | struct dwarf2_cu *cu) | |
6859 | { | |
15d034d0 | 6860 | const char *parent_scope; |
72bf9492 | 6861 | |
98bfdba5 PA |
6862 | /* If this is a template instantiation, we can not work out the |
6863 | template arguments from partial DIEs. So, unfortunately, we have | |
6864 | to go through the full DIEs. At least any work we do building | |
6865 | types here will be reused if full symbols are loaded later. */ | |
6866 | if (pdi->has_template_arguments) | |
6867 | { | |
6868 | fixup_partial_die (pdi, cu); | |
6869 | ||
6870 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6871 | { | |
6872 | struct die_info *die; | |
6873 | struct attribute attr; | |
6874 | struct dwarf2_cu *ref_cu = cu; | |
6875 | ||
b64f50a1 | 6876 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 6877 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 6878 | attr.form = DW_FORM_ref_addr; |
4568ecf9 | 6879 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6880 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6881 | ||
6882 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6883 | } | |
6884 | } | |
6885 | ||
72bf9492 DJ |
6886 | parent_scope = partial_die_parent_scope (pdi, cu); |
6887 | if (parent_scope == NULL) | |
6888 | return NULL; | |
6889 | else | |
f55ee35c | 6890 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6891 | } |
6892 | ||
6893 | static void | |
72bf9492 | 6894 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6895 | { |
e7c27a73 | 6896 | struct objfile *objfile = cu->objfile; |
3e29f34a | 6897 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 6898 | CORE_ADDR addr = 0; |
15d034d0 | 6899 | const char *actual_name = NULL; |
e142c38c | 6900 | CORE_ADDR baseaddr; |
15d034d0 | 6901 | char *built_actual_name; |
e142c38c DJ |
6902 | |
6903 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6904 | |
15d034d0 TT |
6905 | built_actual_name = partial_die_full_name (pdi, cu); |
6906 | if (built_actual_name != NULL) | |
6907 | actual_name = built_actual_name; | |
63d06c5c | 6908 | |
72bf9492 DJ |
6909 | if (actual_name == NULL) |
6910 | actual_name = pdi->name; | |
6911 | ||
c906108c SS |
6912 | switch (pdi->tag) |
6913 | { | |
6914 | case DW_TAG_subprogram: | |
3e29f34a | 6915 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 6916 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6917 | { |
2cfa0c8d JB |
6918 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6919 | of the global scope. But in Ada, we want to be able to access | |
6920 | nested procedures globally. So all Ada subprograms are stored | |
6921 | in the global scope. */ | |
f47fb265 | 6922 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6923 | built_actual_name != NULL, |
f47fb265 MS |
6924 | VAR_DOMAIN, LOC_BLOCK, |
6925 | &objfile->global_psymbols, | |
1762568f | 6926 | addr, cu->language, objfile); |
c906108c SS |
6927 | } |
6928 | else | |
6929 | { | |
f47fb265 | 6930 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6931 | built_actual_name != NULL, |
f47fb265 MS |
6932 | VAR_DOMAIN, LOC_BLOCK, |
6933 | &objfile->static_psymbols, | |
1762568f | 6934 | addr, cu->language, objfile); |
c906108c | 6935 | } |
0c1b455e TT |
6936 | |
6937 | if (pdi->main_subprogram && actual_name != NULL) | |
6938 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 6939 | break; |
72929c62 JB |
6940 | case DW_TAG_constant: |
6941 | { | |
6942 | struct psymbol_allocation_list *list; | |
6943 | ||
6944 | if (pdi->is_external) | |
6945 | list = &objfile->global_psymbols; | |
6946 | else | |
6947 | list = &objfile->static_psymbols; | |
f47fb265 | 6948 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6949 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 6950 | list, 0, cu->language, objfile); |
72929c62 JB |
6951 | } |
6952 | break; | |
c906108c | 6953 | case DW_TAG_variable: |
95554aad TT |
6954 | if (pdi->d.locdesc) |
6955 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6956 | |
95554aad | 6957 | if (pdi->d.locdesc |
caac4577 JG |
6958 | && addr == 0 |
6959 | && !dwarf2_per_objfile->has_section_at_zero) | |
6960 | { | |
6961 | /* A global or static variable may also have been stripped | |
6962 | out by the linker if unused, in which case its address | |
6963 | will be nullified; do not add such variables into partial | |
6964 | symbol table then. */ | |
6965 | } | |
6966 | else if (pdi->is_external) | |
c906108c SS |
6967 | { |
6968 | /* Global Variable. | |
6969 | Don't enter into the minimal symbol tables as there is | |
6970 | a minimal symbol table entry from the ELF symbols already. | |
6971 | Enter into partial symbol table if it has a location | |
6972 | descriptor or a type. | |
6973 | If the location descriptor is missing, new_symbol will create | |
6974 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6975 | be determined from the minimal symbol table whenever the variable | |
6976 | is referenced. | |
6977 | The address for the partial symbol table entry is not | |
6978 | used by GDB, but it comes in handy for debugging partial symbol | |
6979 | table building. */ | |
6980 | ||
95554aad | 6981 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6982 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6983 | built_actual_name != NULL, |
f47fb265 MS |
6984 | VAR_DOMAIN, LOC_STATIC, |
6985 | &objfile->global_psymbols, | |
1762568f | 6986 | addr + baseaddr, |
f47fb265 | 6987 | cu->language, objfile); |
c906108c SS |
6988 | } |
6989 | else | |
6990 | { | |
ff908ebf AW |
6991 | int has_loc = pdi->d.locdesc != NULL; |
6992 | ||
6993 | /* Static Variable. Skip symbols whose value we cannot know (those | |
6994 | without location descriptors or constant values). */ | |
6995 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 6996 | { |
15d034d0 | 6997 | xfree (built_actual_name); |
decbce07 MS |
6998 | return; |
6999 | } | |
ff908ebf | 7000 | |
f47fb265 | 7001 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7002 | built_actual_name != NULL, |
f47fb265 MS |
7003 | VAR_DOMAIN, LOC_STATIC, |
7004 | &objfile->static_psymbols, | |
ff908ebf | 7005 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 7006 | cu->language, objfile); |
c906108c SS |
7007 | } |
7008 | break; | |
7009 | case DW_TAG_typedef: | |
7010 | case DW_TAG_base_type: | |
a02abb62 | 7011 | case DW_TAG_subrange_type: |
38d518c9 | 7012 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7013 | built_actual_name != NULL, |
176620f1 | 7014 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7015 | &objfile->static_psymbols, |
1762568f | 7016 | 0, cu->language, objfile); |
c906108c | 7017 | break; |
74921315 | 7018 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7019 | case DW_TAG_namespace: |
7020 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7021 | built_actual_name != NULL, |
72bf9492 DJ |
7022 | VAR_DOMAIN, LOC_TYPEDEF, |
7023 | &objfile->global_psymbols, | |
1762568f | 7024 | 0, cu->language, objfile); |
72bf9492 | 7025 | break; |
530e8392 KB |
7026 | case DW_TAG_module: |
7027 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7028 | built_actual_name != NULL, | |
7029 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7030 | &objfile->global_psymbols, | |
1762568f | 7031 | 0, cu->language, objfile); |
530e8392 | 7032 | break; |
c906108c | 7033 | case DW_TAG_class_type: |
680b30c7 | 7034 | case DW_TAG_interface_type: |
c906108c SS |
7035 | case DW_TAG_structure_type: |
7036 | case DW_TAG_union_type: | |
7037 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7038 | /* Skip external references. The DWARF standard says in the section |
7039 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7040 | structure, union or class type is represented by a structure, | |
7041 | union or class entry that does not have a byte size attribute | |
7042 | and that has a DW_AT_declaration attribute." */ | |
7043 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7044 | { |
15d034d0 | 7045 | xfree (built_actual_name); |
decbce07 MS |
7046 | return; |
7047 | } | |
fa4028e9 | 7048 | |
63d06c5c DC |
7049 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7050 | static vs. global. */ | |
38d518c9 | 7051 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7052 | built_actual_name != NULL, |
176620f1 | 7053 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 7054 | cu->language == language_cplus |
63d06c5c DC |
7055 | ? &objfile->global_psymbols |
7056 | : &objfile->static_psymbols, | |
1762568f | 7057 | 0, cu->language, objfile); |
c906108c | 7058 | |
c906108c SS |
7059 | break; |
7060 | case DW_TAG_enumerator: | |
38d518c9 | 7061 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7062 | built_actual_name != NULL, |
176620f1 | 7063 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 7064 | cu->language == language_cplus |
f6fe98ef DJ |
7065 | ? &objfile->global_psymbols |
7066 | : &objfile->static_psymbols, | |
1762568f | 7067 | 0, cu->language, objfile); |
c906108c SS |
7068 | break; |
7069 | default: | |
7070 | break; | |
7071 | } | |
5c4e30ca | 7072 | |
15d034d0 | 7073 | xfree (built_actual_name); |
c906108c SS |
7074 | } |
7075 | ||
5c4e30ca DC |
7076 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7077 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7078 | the name of the enclosing namespace. */ | |
91c24f0a | 7079 | |
72bf9492 DJ |
7080 | static void |
7081 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7082 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7083 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7084 | { |
72bf9492 | 7085 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7086 | |
72bf9492 | 7087 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7088 | |
7089 | /* Now scan partial symbols in that namespace. */ | |
7090 | ||
91c24f0a | 7091 | if (pdi->has_children) |
cdc07690 | 7092 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7093 | } |
7094 | ||
5d7cb8df JK |
7095 | /* Read a partial die corresponding to a Fortran module. */ |
7096 | ||
7097 | static void | |
7098 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7099 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7100 | { |
530e8392 KB |
7101 | /* Add a symbol for the namespace. */ |
7102 | ||
7103 | add_partial_symbol (pdi, cu); | |
7104 | ||
f55ee35c | 7105 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7106 | |
7107 | if (pdi->has_children) | |
cdc07690 | 7108 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7109 | } |
7110 | ||
bc30ff58 JB |
7111 | /* Read a partial die corresponding to a subprogram and create a partial |
7112 | symbol for that subprogram. When the CU language allows it, this | |
7113 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7114 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7115 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7116 | and highest PC values found in PDI. | |
6e70227d | 7117 | |
cdc07690 YQ |
7118 | PDI may also be a lexical block, in which case we simply search |
7119 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7120 | Again, this is only performed when the CU language allows this |
7121 | type of definitions. */ | |
7122 | ||
7123 | static void | |
7124 | add_partial_subprogram (struct partial_die_info *pdi, | |
7125 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7126 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7127 | { |
7128 | if (pdi->tag == DW_TAG_subprogram) | |
7129 | { | |
7130 | if (pdi->has_pc_info) | |
7131 | { | |
7132 | if (pdi->lowpc < *lowpc) | |
7133 | *lowpc = pdi->lowpc; | |
7134 | if (pdi->highpc > *highpc) | |
7135 | *highpc = pdi->highpc; | |
cdc07690 | 7136 | if (set_addrmap) |
5734ee8b | 7137 | { |
5734ee8b | 7138 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7139 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7140 | CORE_ADDR baseaddr; | |
7141 | CORE_ADDR highpc; | |
7142 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7143 | |
7144 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7145 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7146 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7147 | pdi->lowpc + baseaddr); | |
7148 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7149 | pdi->highpc + baseaddr); | |
7150 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7151 | cu->per_cu->v.psymtab); |
5734ee8b | 7152 | } |
481860b3 GB |
7153 | } |
7154 | ||
7155 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7156 | { | |
bc30ff58 | 7157 | if (!pdi->is_declaration) |
e8d05480 JB |
7158 | /* Ignore subprogram DIEs that do not have a name, they are |
7159 | illegal. Do not emit a complaint at this point, we will | |
7160 | do so when we convert this psymtab into a symtab. */ | |
7161 | if (pdi->name) | |
7162 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7163 | } |
7164 | } | |
6e70227d | 7165 | |
bc30ff58 JB |
7166 | if (! pdi->has_children) |
7167 | return; | |
7168 | ||
7169 | if (cu->language == language_ada) | |
7170 | { | |
7171 | pdi = pdi->die_child; | |
7172 | while (pdi != NULL) | |
7173 | { | |
7174 | fixup_partial_die (pdi, cu); | |
7175 | if (pdi->tag == DW_TAG_subprogram | |
7176 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7177 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7178 | pdi = pdi->die_sibling; |
7179 | } | |
7180 | } | |
7181 | } | |
7182 | ||
91c24f0a DC |
7183 | /* Read a partial die corresponding to an enumeration type. */ |
7184 | ||
72bf9492 DJ |
7185 | static void |
7186 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7187 | struct dwarf2_cu *cu) | |
91c24f0a | 7188 | { |
72bf9492 | 7189 | struct partial_die_info *pdi; |
91c24f0a DC |
7190 | |
7191 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7192 | add_partial_symbol (enum_pdi, cu); |
7193 | ||
7194 | pdi = enum_pdi->die_child; | |
7195 | while (pdi) | |
91c24f0a | 7196 | { |
72bf9492 | 7197 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7198 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7199 | else |
72bf9492 DJ |
7200 | add_partial_symbol (pdi, cu); |
7201 | pdi = pdi->die_sibling; | |
91c24f0a | 7202 | } |
91c24f0a DC |
7203 | } |
7204 | ||
6caca83c CC |
7205 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7206 | ||
7207 | static unsigned int | |
d521ce57 | 7208 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7209 | { |
7210 | unsigned int bytes_read; | |
7211 | ||
7212 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7213 | } | |
7214 | ||
4bb7a0a7 DJ |
7215 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7216 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7217 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7218 | the initial number. */ | |
7219 | ||
7220 | static struct abbrev_info * | |
d521ce57 | 7221 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7222 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7223 | { |
7224 | bfd *abfd = cu->objfile->obfd; | |
7225 | unsigned int abbrev_number; | |
7226 | struct abbrev_info *abbrev; | |
7227 | ||
7228 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7229 | ||
7230 | if (abbrev_number == 0) | |
7231 | return NULL; | |
7232 | ||
433df2d4 | 7233 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7234 | if (!abbrev) |
7235 | { | |
422b9917 DE |
7236 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
7237 | " at offset 0x%x [in module %s]"), | |
7238 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
7239 | cu->header.offset.sect_off, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
7240 | } |
7241 | ||
7242 | return abbrev; | |
7243 | } | |
7244 | ||
93311388 DE |
7245 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7246 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7247 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7248 | ||
d521ce57 TT |
7249 | static const gdb_byte * |
7250 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7251 | { |
dee91e82 | 7252 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7253 | struct abbrev_info *abbrev; |
7254 | unsigned int bytes_read; | |
7255 | ||
7256 | while (1) | |
7257 | { | |
7258 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7259 | if (abbrev == NULL) | |
7260 | return info_ptr + bytes_read; | |
7261 | else | |
dee91e82 | 7262 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7263 | } |
7264 | } | |
7265 | ||
93311388 DE |
7266 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7267 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7268 | abbrev corresponding to that skipped uleb128 should be passed in |
7269 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7270 | children. */ | |
7271 | ||
d521ce57 TT |
7272 | static const gdb_byte * |
7273 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7274 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7275 | { |
7276 | unsigned int bytes_read; | |
7277 | struct attribute attr; | |
dee91e82 DE |
7278 | bfd *abfd = reader->abfd; |
7279 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7280 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7281 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
7282 | unsigned int form, i; |
7283 | ||
7284 | for (i = 0; i < abbrev->num_attrs; i++) | |
7285 | { | |
7286 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7287 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7288 | { | |
dee91e82 | 7289 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7290 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7291 | complaint (&symfile_complaints, |
7292 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7293 | else |
b9502d3f WN |
7294 | { |
7295 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
7296 | const gdb_byte *sibling_ptr = buffer + off; | |
7297 | ||
7298 | if (sibling_ptr < info_ptr) | |
7299 | complaint (&symfile_complaints, | |
7300 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7301 | else if (sibling_ptr > reader->buffer_end) |
7302 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7303 | else |
7304 | return sibling_ptr; | |
7305 | } | |
4bb7a0a7 DJ |
7306 | } |
7307 | ||
7308 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7309 | form = abbrev->attrs[i].form; | |
7310 | skip_attribute: | |
7311 | switch (form) | |
7312 | { | |
4bb7a0a7 | 7313 | case DW_FORM_ref_addr: |
ae411497 TT |
7314 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7315 | and later it is offset sized. */ | |
7316 | if (cu->header.version == 2) | |
7317 | info_ptr += cu->header.addr_size; | |
7318 | else | |
7319 | info_ptr += cu->header.offset_size; | |
7320 | break; | |
36586728 TT |
7321 | case DW_FORM_GNU_ref_alt: |
7322 | info_ptr += cu->header.offset_size; | |
7323 | break; | |
ae411497 | 7324 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7325 | info_ptr += cu->header.addr_size; |
7326 | break; | |
7327 | case DW_FORM_data1: | |
7328 | case DW_FORM_ref1: | |
7329 | case DW_FORM_flag: | |
7330 | info_ptr += 1; | |
7331 | break; | |
2dc7f7b3 TT |
7332 | case DW_FORM_flag_present: |
7333 | break; | |
4bb7a0a7 DJ |
7334 | case DW_FORM_data2: |
7335 | case DW_FORM_ref2: | |
7336 | info_ptr += 2; | |
7337 | break; | |
7338 | case DW_FORM_data4: | |
7339 | case DW_FORM_ref4: | |
7340 | info_ptr += 4; | |
7341 | break; | |
7342 | case DW_FORM_data8: | |
7343 | case DW_FORM_ref8: | |
55f1336d | 7344 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7345 | info_ptr += 8; |
7346 | break; | |
7347 | case DW_FORM_string: | |
9b1c24c8 | 7348 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7349 | info_ptr += bytes_read; |
7350 | break; | |
2dc7f7b3 | 7351 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7352 | case DW_FORM_strp: |
36586728 | 7353 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7354 | info_ptr += cu->header.offset_size; |
7355 | break; | |
2dc7f7b3 | 7356 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7357 | case DW_FORM_block: |
7358 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7359 | info_ptr += bytes_read; | |
7360 | break; | |
7361 | case DW_FORM_block1: | |
7362 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7363 | break; | |
7364 | case DW_FORM_block2: | |
7365 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7366 | break; | |
7367 | case DW_FORM_block4: | |
7368 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7369 | break; | |
7370 | case DW_FORM_sdata: | |
7371 | case DW_FORM_udata: | |
7372 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7373 | case DW_FORM_GNU_addr_index: |
7374 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7375 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7376 | break; |
7377 | case DW_FORM_indirect: | |
7378 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7379 | info_ptr += bytes_read; | |
7380 | /* We need to continue parsing from here, so just go back to | |
7381 | the top. */ | |
7382 | goto skip_attribute; | |
7383 | ||
7384 | default: | |
3e43a32a MS |
7385 | error (_("Dwarf Error: Cannot handle %s " |
7386 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7387 | dwarf_form_name (form), |
7388 | bfd_get_filename (abfd)); | |
7389 | } | |
7390 | } | |
7391 | ||
7392 | if (abbrev->has_children) | |
dee91e82 | 7393 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7394 | else |
7395 | return info_ptr; | |
7396 | } | |
7397 | ||
93311388 | 7398 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7399 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7400 | |
d521ce57 | 7401 | static const gdb_byte * |
dee91e82 DE |
7402 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7403 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7404 | const gdb_byte *info_ptr) |
91c24f0a DC |
7405 | { |
7406 | /* Do we know the sibling already? */ | |
72bf9492 | 7407 | |
91c24f0a DC |
7408 | if (orig_pdi->sibling) |
7409 | return orig_pdi->sibling; | |
7410 | ||
7411 | /* Are there any children to deal with? */ | |
7412 | ||
7413 | if (!orig_pdi->has_children) | |
7414 | return info_ptr; | |
7415 | ||
4bb7a0a7 | 7416 | /* Skip the children the long way. */ |
91c24f0a | 7417 | |
dee91e82 | 7418 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7419 | } |
7420 | ||
257e7a09 | 7421 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7422 | not NULL. */ |
c906108c SS |
7423 | |
7424 | static void | |
257e7a09 YQ |
7425 | dwarf2_read_symtab (struct partial_symtab *self, |
7426 | struct objfile *objfile) | |
c906108c | 7427 | { |
257e7a09 | 7428 | if (self->readin) |
c906108c | 7429 | { |
442e4d9c | 7430 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7431 | self->filename); |
442e4d9c YQ |
7432 | } |
7433 | else | |
7434 | { | |
7435 | if (info_verbose) | |
c906108c | 7436 | { |
442e4d9c | 7437 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7438 | self->filename); |
442e4d9c | 7439 | gdb_flush (gdb_stdout); |
c906108c | 7440 | } |
c906108c | 7441 | |
442e4d9c | 7442 | /* Restore our global data. */ |
9a3c8263 SM |
7443 | dwarf2_per_objfile |
7444 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
7445 | dwarf2_objfile_data_key); | |
10b3939b | 7446 | |
442e4d9c YQ |
7447 | /* If this psymtab is constructed from a debug-only objfile, the |
7448 | has_section_at_zero flag will not necessarily be correct. We | |
7449 | can get the correct value for this flag by looking at the data | |
7450 | associated with the (presumably stripped) associated objfile. */ | |
7451 | if (objfile->separate_debug_objfile_backlink) | |
7452 | { | |
7453 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
7454 | = ((struct dwarf2_per_objfile *) |
7455 | objfile_data (objfile->separate_debug_objfile_backlink, | |
7456 | dwarf2_objfile_data_key)); | |
9a619af0 | 7457 | |
442e4d9c YQ |
7458 | dwarf2_per_objfile->has_section_at_zero |
7459 | = dpo_backlink->has_section_at_zero; | |
7460 | } | |
b2ab525c | 7461 | |
442e4d9c | 7462 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7463 | |
257e7a09 | 7464 | psymtab_to_symtab_1 (self); |
c906108c | 7465 | |
442e4d9c YQ |
7466 | /* Finish up the debug error message. */ |
7467 | if (info_verbose) | |
7468 | printf_filtered (_("done.\n")); | |
c906108c | 7469 | } |
95554aad TT |
7470 | |
7471 | process_cu_includes (); | |
c906108c | 7472 | } |
9cdd5dbd DE |
7473 | \f |
7474 | /* Reading in full CUs. */ | |
c906108c | 7475 | |
10b3939b DJ |
7476 | /* Add PER_CU to the queue. */ |
7477 | ||
7478 | static void | |
95554aad TT |
7479 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7480 | enum language pretend_language) | |
10b3939b DJ |
7481 | { |
7482 | struct dwarf2_queue_item *item; | |
7483 | ||
7484 | per_cu->queued = 1; | |
8d749320 | 7485 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 7486 | item->per_cu = per_cu; |
95554aad | 7487 | item->pretend_language = pretend_language; |
10b3939b DJ |
7488 | item->next = NULL; |
7489 | ||
7490 | if (dwarf2_queue == NULL) | |
7491 | dwarf2_queue = item; | |
7492 | else | |
7493 | dwarf2_queue_tail->next = item; | |
7494 | ||
7495 | dwarf2_queue_tail = item; | |
7496 | } | |
7497 | ||
89e63ee4 DE |
7498 | /* If PER_CU is not yet queued, add it to the queue. |
7499 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7500 | dependency. | |
0907af0c | 7501 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7502 | meaning either PER_CU is already queued or it is already loaded. |
7503 | ||
7504 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7505 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7506 | |
7507 | static int | |
89e63ee4 | 7508 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7509 | struct dwarf2_per_cu_data *per_cu, |
7510 | enum language pretend_language) | |
7511 | { | |
7512 | /* We may arrive here during partial symbol reading, if we need full | |
7513 | DIEs to process an unusual case (e.g. template arguments). Do | |
7514 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7515 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7516 | { | |
7517 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7518 | return 1; | |
7519 | return 0; | |
7520 | } | |
7521 | ||
7522 | /* Mark the dependence relation so that we don't flush PER_CU | |
7523 | too early. */ | |
89e63ee4 DE |
7524 | if (dependent_cu != NULL) |
7525 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7526 | |
7527 | /* If it's already on the queue, we have nothing to do. */ | |
7528 | if (per_cu->queued) | |
7529 | return 0; | |
7530 | ||
7531 | /* If the compilation unit is already loaded, just mark it as | |
7532 | used. */ | |
7533 | if (per_cu->cu != NULL) | |
7534 | { | |
7535 | per_cu->cu->last_used = 0; | |
7536 | return 0; | |
7537 | } | |
7538 | ||
7539 | /* Add it to the queue. */ | |
7540 | queue_comp_unit (per_cu, pretend_language); | |
7541 | ||
7542 | return 1; | |
7543 | } | |
7544 | ||
10b3939b DJ |
7545 | /* Process the queue. */ |
7546 | ||
7547 | static void | |
a0f42c21 | 7548 | process_queue (void) |
10b3939b DJ |
7549 | { |
7550 | struct dwarf2_queue_item *item, *next_item; | |
7551 | ||
b4f54984 | 7552 | if (dwarf_read_debug) |
45cfd468 DE |
7553 | { |
7554 | fprintf_unfiltered (gdb_stdlog, | |
7555 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7556 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7557 | } |
7558 | ||
03dd20cc DJ |
7559 | /* The queue starts out with one item, but following a DIE reference |
7560 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7561 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7562 | { | |
cc12ce38 DE |
7563 | if ((dwarf2_per_objfile->using_index |
7564 | ? !item->per_cu->v.quick->compunit_symtab | |
7565 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
7566 | /* Skip dummy CUs. */ | |
7567 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
7568 | { |
7569 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7570 | unsigned int debug_print_threshold; |
247f5c4f | 7571 | char buf[100]; |
f4dc4d17 | 7572 | |
247f5c4f | 7573 | if (per_cu->is_debug_types) |
f4dc4d17 | 7574 | { |
247f5c4f DE |
7575 | struct signatured_type *sig_type = |
7576 | (struct signatured_type *) per_cu; | |
7577 | ||
7578 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 DE |
7579 | hex_string (sig_type->signature), |
7580 | per_cu->offset.sect_off); | |
7581 | /* There can be 100s of TUs. | |
7582 | Only print them in verbose mode. */ | |
7583 | debug_print_threshold = 2; | |
f4dc4d17 | 7584 | } |
247f5c4f | 7585 | else |
73be47f5 DE |
7586 | { |
7587 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7588 | debug_print_threshold = 1; | |
7589 | } | |
247f5c4f | 7590 | |
b4f54984 | 7591 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7592 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7593 | |
7594 | if (per_cu->is_debug_types) | |
7595 | process_full_type_unit (per_cu, item->pretend_language); | |
7596 | else | |
7597 | process_full_comp_unit (per_cu, item->pretend_language); | |
7598 | ||
b4f54984 | 7599 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7600 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7601 | } |
10b3939b DJ |
7602 | |
7603 | item->per_cu->queued = 0; | |
7604 | next_item = item->next; | |
7605 | xfree (item); | |
7606 | } | |
7607 | ||
7608 | dwarf2_queue_tail = NULL; | |
45cfd468 | 7609 | |
b4f54984 | 7610 | if (dwarf_read_debug) |
45cfd468 DE |
7611 | { |
7612 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7613 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7614 | } |
10b3939b DJ |
7615 | } |
7616 | ||
7617 | /* Free all allocated queue entries. This function only releases anything if | |
7618 | an error was thrown; if the queue was processed then it would have been | |
7619 | freed as we went along. */ | |
7620 | ||
7621 | static void | |
7622 | dwarf2_release_queue (void *dummy) | |
7623 | { | |
7624 | struct dwarf2_queue_item *item, *last; | |
7625 | ||
7626 | item = dwarf2_queue; | |
7627 | while (item) | |
7628 | { | |
7629 | /* Anything still marked queued is likely to be in an | |
7630 | inconsistent state, so discard it. */ | |
7631 | if (item->per_cu->queued) | |
7632 | { | |
7633 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7634 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7635 | item->per_cu->queued = 0; |
7636 | } | |
7637 | ||
7638 | last = item; | |
7639 | item = item->next; | |
7640 | xfree (last); | |
7641 | } | |
7642 | ||
7643 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7644 | } | |
7645 | ||
7646 | /* Read in full symbols for PST, and anything it depends on. */ | |
7647 | ||
c906108c | 7648 | static void |
fba45db2 | 7649 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7650 | { |
10b3939b | 7651 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7652 | int i; |
7653 | ||
95554aad TT |
7654 | if (pst->readin) |
7655 | return; | |
7656 | ||
aaa75496 | 7657 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7658 | if (!pst->dependencies[i]->readin |
7659 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7660 | { |
7661 | /* Inform about additional files that need to be read in. */ | |
7662 | if (info_verbose) | |
7663 | { | |
a3f17187 | 7664 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7665 | fputs_filtered (" ", gdb_stdout); |
7666 | wrap_here (""); | |
7667 | fputs_filtered ("and ", gdb_stdout); | |
7668 | wrap_here (""); | |
7669 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7670 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7671 | gdb_flush (gdb_stdout); |
7672 | } | |
7673 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7674 | } | |
7675 | ||
9a3c8263 | 7676 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
7677 | |
7678 | if (per_cu == NULL) | |
aaa75496 JB |
7679 | { |
7680 | /* It's an include file, no symbols to read for it. | |
7681 | Everything is in the parent symtab. */ | |
7682 | pst->readin = 1; | |
7683 | return; | |
7684 | } | |
c906108c | 7685 | |
a0f42c21 | 7686 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7687 | } |
7688 | ||
dee91e82 DE |
7689 | /* Trivial hash function for die_info: the hash value of a DIE |
7690 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7691 | |
dee91e82 DE |
7692 | static hashval_t |
7693 | die_hash (const void *item) | |
10b3939b | 7694 | { |
9a3c8263 | 7695 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 7696 | |
dee91e82 DE |
7697 | return die->offset.sect_off; |
7698 | } | |
63d06c5c | 7699 | |
dee91e82 DE |
7700 | /* Trivial comparison function for die_info structures: two DIEs |
7701 | are equal if they have the same offset. */ | |
98bfdba5 | 7702 | |
dee91e82 DE |
7703 | static int |
7704 | die_eq (const void *item_lhs, const void *item_rhs) | |
7705 | { | |
9a3c8263 SM |
7706 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
7707 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 7708 | |
dee91e82 DE |
7709 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7710 | } | |
c906108c | 7711 | |
dee91e82 DE |
7712 | /* die_reader_func for load_full_comp_unit. |
7713 | This is identical to read_signatured_type_reader, | |
7714 | but is kept separate for now. */ | |
c906108c | 7715 | |
dee91e82 DE |
7716 | static void |
7717 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7718 | const gdb_byte *info_ptr, |
dee91e82 DE |
7719 | struct die_info *comp_unit_die, |
7720 | int has_children, | |
7721 | void *data) | |
7722 | { | |
7723 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 7724 | enum language *language_ptr = (enum language *) data; |
6caca83c | 7725 | |
dee91e82 DE |
7726 | gdb_assert (cu->die_hash == NULL); |
7727 | cu->die_hash = | |
7728 | htab_create_alloc_ex (cu->header.length / 12, | |
7729 | die_hash, | |
7730 | die_eq, | |
7731 | NULL, | |
7732 | &cu->comp_unit_obstack, | |
7733 | hashtab_obstack_allocate, | |
7734 | dummy_obstack_deallocate); | |
e142c38c | 7735 | |
dee91e82 DE |
7736 | if (has_children) |
7737 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7738 | &info_ptr, comp_unit_die); | |
7739 | cu->dies = comp_unit_die; | |
7740 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7741 | |
7742 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7743 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7744 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7745 | or we won't be able to build types correctly. |
7746 | Similarly, if we do not read the producer, we can not apply | |
7747 | producer-specific interpretation. */ | |
95554aad | 7748 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7749 | } |
10b3939b | 7750 | |
dee91e82 | 7751 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7752 | |
dee91e82 | 7753 | static void |
95554aad TT |
7754 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7755 | enum language pretend_language) | |
dee91e82 | 7756 | { |
3019eac3 | 7757 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7758 | |
f4dc4d17 DE |
7759 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7760 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7761 | } |
7762 | ||
3da10d80 KS |
7763 | /* Add a DIE to the delayed physname list. */ |
7764 | ||
7765 | static void | |
7766 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7767 | const char *name, struct die_info *die, | |
7768 | struct dwarf2_cu *cu) | |
7769 | { | |
7770 | struct delayed_method_info mi; | |
7771 | mi.type = type; | |
7772 | mi.fnfield_index = fnfield_index; | |
7773 | mi.index = index; | |
7774 | mi.name = name; | |
7775 | mi.die = die; | |
7776 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7777 | } | |
7778 | ||
7779 | /* A cleanup for freeing the delayed method list. */ | |
7780 | ||
7781 | static void | |
7782 | free_delayed_list (void *ptr) | |
7783 | { | |
7784 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7785 | if (cu->method_list != NULL) | |
7786 | { | |
7787 | VEC_free (delayed_method_info, cu->method_list); | |
7788 | cu->method_list = NULL; | |
7789 | } | |
7790 | } | |
7791 | ||
7792 | /* Compute the physnames of any methods on the CU's method list. | |
7793 | ||
7794 | The computation of method physnames is delayed in order to avoid the | |
7795 | (bad) condition that one of the method's formal parameters is of an as yet | |
7796 | incomplete type. */ | |
7797 | ||
7798 | static void | |
7799 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7800 | { | |
7801 | int i; | |
7802 | struct delayed_method_info *mi; | |
7803 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7804 | { | |
1d06ead6 | 7805 | const char *physname; |
3da10d80 KS |
7806 | struct fn_fieldlist *fn_flp |
7807 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7808 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
7809 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
7810 | = physname ? physname : ""; | |
3da10d80 KS |
7811 | } |
7812 | } | |
7813 | ||
a766d390 DE |
7814 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7815 | and it's not clear if/how imported objects will appear. | |
7816 | To keep Go support simple until that's worked out, | |
7817 | go back through what we've read and create something usable. | |
7818 | We could do this while processing each DIE, and feels kinda cleaner, | |
7819 | but that way is more invasive. | |
7820 | This is to, for example, allow the user to type "p var" or "b main" | |
7821 | without having to specify the package name, and allow lookups | |
7822 | of module.object to work in contexts that use the expression | |
7823 | parser. */ | |
7824 | ||
7825 | static void | |
7826 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7827 | { | |
7828 | char *package_name = NULL; | |
7829 | struct pending *list; | |
7830 | int i; | |
7831 | ||
7832 | for (list = global_symbols; list != NULL; list = list->next) | |
7833 | { | |
7834 | for (i = 0; i < list->nsyms; ++i) | |
7835 | { | |
7836 | struct symbol *sym = list->symbol[i]; | |
7837 | ||
7838 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7839 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7840 | { | |
7841 | char *this_package_name = go_symbol_package_name (sym); | |
7842 | ||
7843 | if (this_package_name == NULL) | |
7844 | continue; | |
7845 | if (package_name == NULL) | |
7846 | package_name = this_package_name; | |
7847 | else | |
7848 | { | |
7849 | if (strcmp (package_name, this_package_name) != 0) | |
7850 | complaint (&symfile_complaints, | |
7851 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
7852 | (symbol_symtab (sym) != NULL |
7853 | ? symtab_to_filename_for_display | |
7854 | (symbol_symtab (sym)) | |
4262abfb | 7855 | : objfile_name (cu->objfile)), |
a766d390 DE |
7856 | this_package_name, package_name); |
7857 | xfree (this_package_name); | |
7858 | } | |
7859 | } | |
7860 | } | |
7861 | } | |
7862 | ||
7863 | if (package_name != NULL) | |
7864 | { | |
7865 | struct objfile *objfile = cu->objfile; | |
34a68019 | 7866 | const char *saved_package_name |
224c3ddb SM |
7867 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
7868 | package_name, | |
7869 | strlen (package_name)); | |
19f392bc UW |
7870 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
7871 | saved_package_name); | |
a766d390 DE |
7872 | struct symbol *sym; |
7873 | ||
7874 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7875 | ||
e623cf5d | 7876 | sym = allocate_symbol (objfile); |
f85f34ed | 7877 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7878 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7879 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7880 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7881 | e.g., "main" finds the "main" module and not C's main(). */ | |
7882 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7883 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7884 | SYMBOL_TYPE (sym) = type; |
7885 | ||
7886 | add_symbol_to_list (sym, &global_symbols); | |
7887 | ||
7888 | xfree (package_name); | |
7889 | } | |
7890 | } | |
7891 | ||
95554aad TT |
7892 | /* Return the symtab for PER_CU. This works properly regardless of |
7893 | whether we're using the index or psymtabs. */ | |
7894 | ||
43f3e411 DE |
7895 | static struct compunit_symtab * |
7896 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
7897 | { |
7898 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
7899 | ? per_cu->v.quick->compunit_symtab |
7900 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
7901 | } |
7902 | ||
7903 | /* A helper function for computing the list of all symbol tables | |
7904 | included by PER_CU. */ | |
7905 | ||
7906 | static void | |
43f3e411 | 7907 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 7908 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 7909 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 7910 | struct compunit_symtab *immediate_parent) |
95554aad TT |
7911 | { |
7912 | void **slot; | |
7913 | int ix; | |
43f3e411 | 7914 | struct compunit_symtab *cust; |
95554aad TT |
7915 | struct dwarf2_per_cu_data *iter; |
7916 | ||
7917 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7918 | if (*slot != NULL) | |
7919 | { | |
7920 | /* This inclusion and its children have been processed. */ | |
7921 | return; | |
7922 | } | |
7923 | ||
7924 | *slot = per_cu; | |
7925 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
7926 | cust = get_compunit_symtab (per_cu); |
7927 | if (cust != NULL) | |
ec94af83 DE |
7928 | { |
7929 | /* If this is a type unit only add its symbol table if we haven't | |
7930 | seen it yet (type unit per_cu's can share symtabs). */ | |
7931 | if (per_cu->is_debug_types) | |
7932 | { | |
43f3e411 | 7933 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
7934 | if (*slot == NULL) |
7935 | { | |
43f3e411 DE |
7936 | *slot = cust; |
7937 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
7938 | if (cust->user == NULL) | |
7939 | cust->user = immediate_parent; | |
ec94af83 DE |
7940 | } |
7941 | } | |
7942 | else | |
f9125b6c | 7943 | { |
43f3e411 DE |
7944 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
7945 | if (cust->user == NULL) | |
7946 | cust->user = immediate_parent; | |
f9125b6c | 7947 | } |
ec94af83 | 7948 | } |
95554aad TT |
7949 | |
7950 | for (ix = 0; | |
796a7ff8 | 7951 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7952 | ++ix) |
ec94af83 DE |
7953 | { |
7954 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 7955 | all_type_symtabs, iter, cust); |
ec94af83 | 7956 | } |
95554aad TT |
7957 | } |
7958 | ||
43f3e411 | 7959 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
7960 | PER_CU. */ |
7961 | ||
7962 | static void | |
43f3e411 | 7963 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 7964 | { |
f4dc4d17 DE |
7965 | gdb_assert (! per_cu->is_debug_types); |
7966 | ||
796a7ff8 | 7967 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7968 | { |
7969 | int ix, len; | |
ec94af83 | 7970 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
7971 | struct compunit_symtab *compunit_symtab_iter; |
7972 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 7973 | htab_t all_children, all_type_symtabs; |
43f3e411 | 7974 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
7975 | |
7976 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 7977 | if (cust == NULL) |
95554aad TT |
7978 | return; |
7979 | ||
7980 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7981 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7982 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7983 | NULL, xcalloc, xfree); | |
95554aad TT |
7984 | |
7985 | for (ix = 0; | |
796a7ff8 | 7986 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7987 | ix, per_cu_iter); |
95554aad | 7988 | ++ix) |
ec94af83 DE |
7989 | { |
7990 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 7991 | all_type_symtabs, per_cu_iter, |
43f3e411 | 7992 | cust); |
ec94af83 | 7993 | } |
95554aad | 7994 | |
ec94af83 | 7995 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
7996 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
7997 | cust->includes | |
8d749320 SM |
7998 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
7999 | struct compunit_symtab *, len + 1); | |
95554aad | 8000 | for (ix = 0; |
43f3e411 DE |
8001 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
8002 | compunit_symtab_iter); | |
95554aad | 8003 | ++ix) |
43f3e411 DE |
8004 | cust->includes[ix] = compunit_symtab_iter; |
8005 | cust->includes[len] = NULL; | |
95554aad | 8006 | |
43f3e411 | 8007 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8008 | htab_delete (all_children); |
ec94af83 | 8009 | htab_delete (all_type_symtabs); |
95554aad TT |
8010 | } |
8011 | } | |
8012 | ||
8013 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8014 | read. */ | |
8015 | ||
8016 | static void | |
8017 | process_cu_includes (void) | |
8018 | { | |
8019 | int ix; | |
8020 | struct dwarf2_per_cu_data *iter; | |
8021 | ||
8022 | for (ix = 0; | |
8023 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8024 | ix, iter); | |
8025 | ++ix) | |
f4dc4d17 DE |
8026 | { |
8027 | if (! iter->is_debug_types) | |
43f3e411 | 8028 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8029 | } |
95554aad TT |
8030 | |
8031 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8032 | } | |
8033 | ||
9cdd5dbd | 8034 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8035 | already been loaded into memory. */ |
8036 | ||
8037 | static void | |
95554aad TT |
8038 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8039 | enum language pretend_language) | |
10b3939b | 8040 | { |
10b3939b | 8041 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8042 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8043 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8044 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8045 | struct compunit_symtab *cust; |
3da10d80 | 8046 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 8047 | CORE_ADDR baseaddr; |
4359dff1 | 8048 | struct block *static_block; |
3e29f34a | 8049 | CORE_ADDR addr; |
10b3939b DJ |
8050 | |
8051 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8052 | ||
10b3939b DJ |
8053 | buildsym_init (); |
8054 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 8055 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8056 | |
8057 | cu->list_in_scope = &file_symbols; | |
c906108c | 8058 | |
95554aad TT |
8059 | cu->language = pretend_language; |
8060 | cu->language_defn = language_def (cu->language); | |
8061 | ||
c906108c | 8062 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8063 | process_die (cu->dies, cu); |
c906108c | 8064 | |
a766d390 DE |
8065 | /* For now fudge the Go package. */ |
8066 | if (cu->language == language_go) | |
8067 | fixup_go_packaging (cu); | |
8068 | ||
3da10d80 KS |
8069 | /* Now that we have processed all the DIEs in the CU, all the types |
8070 | should be complete, and it should now be safe to compute all of the | |
8071 | physnames. */ | |
8072 | compute_delayed_physnames (cu); | |
8073 | do_cleanups (delayed_list_cleanup); | |
8074 | ||
fae299cd DC |
8075 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8076 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8077 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8078 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8079 | |
3e29f34a MR |
8080 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8081 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8082 | |
8083 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8084 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8085 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8086 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8087 | this comp unit. */ | |
8088 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8089 | ||
43f3e411 DE |
8090 | cust = end_symtab_from_static_block (static_block, |
8091 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8092 | |
43f3e411 | 8093 | if (cust != NULL) |
c906108c | 8094 | { |
df15bd07 | 8095 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8096 | |
8be455d7 JK |
8097 | /* Set symtab language to language from DW_AT_language. If the |
8098 | compilation is from a C file generated by language preprocessors, do | |
8099 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8100 | if (!(cu->language == language_c |
40e3ad0e | 8101 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8102 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8103 | |
8104 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8105 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8106 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8107 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8108 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8109 | |
8110 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8111 | needed, it would be wrong due to missing DW_AT_producer there. | |
8112 | ||
8113 | Still one can confuse GDB by using non-standard GCC compilation | |
8114 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8115 | */ | |
ab260dad | 8116 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8117 | cust->locations_valid = 1; |
e0d00bc7 JK |
8118 | |
8119 | if (gcc_4_minor >= 5) | |
43f3e411 | 8120 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8121 | |
43f3e411 | 8122 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8123 | } |
9291a0cd TT |
8124 | |
8125 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8126 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8127 | else |
8128 | { | |
8129 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8130 | pst->compunit_symtab = cust; |
9291a0cd TT |
8131 | pst->readin = 1; |
8132 | } | |
c906108c | 8133 | |
95554aad TT |
8134 | /* Push it for inclusion processing later. */ |
8135 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
8136 | ||
c906108c | 8137 | do_cleanups (back_to); |
f4dc4d17 | 8138 | } |
45cfd468 | 8139 | |
f4dc4d17 DE |
8140 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8141 | already been loaded into memory. */ | |
8142 | ||
8143 | static void | |
8144 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8145 | enum language pretend_language) | |
8146 | { | |
8147 | struct dwarf2_cu *cu = per_cu->cu; | |
8148 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 8149 | struct compunit_symtab *cust; |
f4dc4d17 | 8150 | struct cleanup *back_to, *delayed_list_cleanup; |
0186c6a7 DE |
8151 | struct signatured_type *sig_type; |
8152 | ||
8153 | gdb_assert (per_cu->is_debug_types); | |
8154 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8155 | |
8156 | buildsym_init (); | |
8157 | back_to = make_cleanup (really_free_pendings, NULL); | |
8158 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
8159 | ||
8160 | cu->list_in_scope = &file_symbols; | |
8161 | ||
8162 | cu->language = pretend_language; | |
8163 | cu->language_defn = language_def (cu->language); | |
8164 | ||
8165 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8166 | process_die (cu->dies, cu); | |
8167 | ||
8168 | /* For now fudge the Go package. */ | |
8169 | if (cu->language == language_go) | |
8170 | fixup_go_packaging (cu); | |
8171 | ||
8172 | /* Now that we have processed all the DIEs in the CU, all the types | |
8173 | should be complete, and it should now be safe to compute all of the | |
8174 | physnames. */ | |
8175 | compute_delayed_physnames (cu); | |
8176 | do_cleanups (delayed_list_cleanup); | |
8177 | ||
8178 | /* TUs share symbol tables. | |
8179 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8180 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8181 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 8182 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 8183 | { |
43f3e411 DE |
8184 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
8185 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 8186 | |
43f3e411 | 8187 | if (cust != NULL) |
f4dc4d17 DE |
8188 | { |
8189 | /* Set symtab language to language from DW_AT_language. If the | |
8190 | compilation is from a C file generated by language preprocessors, | |
8191 | do not set the language if it was already deduced by | |
8192 | start_subfile. */ | |
43f3e411 DE |
8193 | if (!(cu->language == language_c |
8194 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
8195 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
8196 | } |
8197 | } | |
8198 | else | |
8199 | { | |
0ab9ce85 | 8200 | augment_type_symtab (); |
43f3e411 | 8201 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
8202 | } |
8203 | ||
8204 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8205 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
8206 | else |
8207 | { | |
8208 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8209 | pst->compunit_symtab = cust; |
f4dc4d17 | 8210 | pst->readin = 1; |
45cfd468 | 8211 | } |
f4dc4d17 DE |
8212 | |
8213 | do_cleanups (back_to); | |
c906108c SS |
8214 | } |
8215 | ||
95554aad TT |
8216 | /* Process an imported unit DIE. */ |
8217 | ||
8218 | static void | |
8219 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8220 | { | |
8221 | struct attribute *attr; | |
8222 | ||
f4dc4d17 DE |
8223 | /* For now we don't handle imported units in type units. */ |
8224 | if (cu->per_cu->is_debug_types) | |
8225 | { | |
8226 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8227 | " supported in type units [in module %s]"), | |
4262abfb | 8228 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8229 | } |
8230 | ||
95554aad TT |
8231 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8232 | if (attr != NULL) | |
8233 | { | |
8234 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 8235 | sect_offset offset; |
36586728 | 8236 | int is_dwz; |
95554aad TT |
8237 | |
8238 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
8239 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
8240 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 8241 | |
69d751e3 | 8242 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8243 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8244 | load_full_comp_unit (per_cu, cu->language); | |
8245 | ||
796a7ff8 | 8246 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8247 | per_cu); |
8248 | } | |
8249 | } | |
8250 | ||
adde2bff DE |
8251 | /* Reset the in_process bit of a die. */ |
8252 | ||
8253 | static void | |
8254 | reset_die_in_process (void *arg) | |
8255 | { | |
9a3c8263 | 8256 | struct die_info *die = (struct die_info *) arg; |
8c3cb9fa | 8257 | |
adde2bff DE |
8258 | die->in_process = 0; |
8259 | } | |
8260 | ||
c906108c SS |
8261 | /* Process a die and its children. */ |
8262 | ||
8263 | static void | |
e7c27a73 | 8264 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8265 | { |
adde2bff DE |
8266 | struct cleanup *in_process; |
8267 | ||
8268 | /* We should only be processing those not already in process. */ | |
8269 | gdb_assert (!die->in_process); | |
8270 | ||
8271 | die->in_process = 1; | |
8272 | in_process = make_cleanup (reset_die_in_process,die); | |
8273 | ||
c906108c SS |
8274 | switch (die->tag) |
8275 | { | |
8276 | case DW_TAG_padding: | |
8277 | break; | |
8278 | case DW_TAG_compile_unit: | |
95554aad | 8279 | case DW_TAG_partial_unit: |
e7c27a73 | 8280 | read_file_scope (die, cu); |
c906108c | 8281 | break; |
348e048f DE |
8282 | case DW_TAG_type_unit: |
8283 | read_type_unit_scope (die, cu); | |
8284 | break; | |
c906108c | 8285 | case DW_TAG_subprogram: |
c906108c | 8286 | case DW_TAG_inlined_subroutine: |
edb3359d | 8287 | read_func_scope (die, cu); |
c906108c SS |
8288 | break; |
8289 | case DW_TAG_lexical_block: | |
14898363 L |
8290 | case DW_TAG_try_block: |
8291 | case DW_TAG_catch_block: | |
e7c27a73 | 8292 | read_lexical_block_scope (die, cu); |
c906108c | 8293 | break; |
96408a79 SA |
8294 | case DW_TAG_GNU_call_site: |
8295 | read_call_site_scope (die, cu); | |
8296 | break; | |
c906108c | 8297 | case DW_TAG_class_type: |
680b30c7 | 8298 | case DW_TAG_interface_type: |
c906108c SS |
8299 | case DW_TAG_structure_type: |
8300 | case DW_TAG_union_type: | |
134d01f1 | 8301 | process_structure_scope (die, cu); |
c906108c SS |
8302 | break; |
8303 | case DW_TAG_enumeration_type: | |
134d01f1 | 8304 | process_enumeration_scope (die, cu); |
c906108c | 8305 | break; |
134d01f1 | 8306 | |
f792889a DJ |
8307 | /* These dies have a type, but processing them does not create |
8308 | a symbol or recurse to process the children. Therefore we can | |
8309 | read them on-demand through read_type_die. */ | |
c906108c | 8310 | case DW_TAG_subroutine_type: |
72019c9c | 8311 | case DW_TAG_set_type: |
c906108c | 8312 | case DW_TAG_array_type: |
c906108c | 8313 | case DW_TAG_pointer_type: |
c906108c | 8314 | case DW_TAG_ptr_to_member_type: |
c906108c | 8315 | case DW_TAG_reference_type: |
c906108c | 8316 | case DW_TAG_string_type: |
c906108c | 8317 | break; |
134d01f1 | 8318 | |
c906108c | 8319 | case DW_TAG_base_type: |
a02abb62 | 8320 | case DW_TAG_subrange_type: |
cb249c71 | 8321 | case DW_TAG_typedef: |
134d01f1 DJ |
8322 | /* Add a typedef symbol for the type definition, if it has a |
8323 | DW_AT_name. */ | |
f792889a | 8324 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8325 | break; |
c906108c | 8326 | case DW_TAG_common_block: |
e7c27a73 | 8327 | read_common_block (die, cu); |
c906108c SS |
8328 | break; |
8329 | case DW_TAG_common_inclusion: | |
8330 | break; | |
d9fa45fe | 8331 | case DW_TAG_namespace: |
4d4ec4e5 | 8332 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8333 | read_namespace (die, cu); |
d9fa45fe | 8334 | break; |
5d7cb8df | 8335 | case DW_TAG_module: |
4d4ec4e5 | 8336 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8337 | read_module (die, cu); |
8338 | break; | |
d9fa45fe | 8339 | case DW_TAG_imported_declaration: |
74921315 KS |
8340 | cu->processing_has_namespace_info = 1; |
8341 | if (read_namespace_alias (die, cu)) | |
8342 | break; | |
8343 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8344 | case DW_TAG_imported_module: |
4d4ec4e5 | 8345 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8346 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8347 | || cu->language != language_fortran)) | |
8348 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8349 | dwarf_tag_name (die->tag)); | |
8350 | read_import_statement (die, cu); | |
d9fa45fe | 8351 | break; |
95554aad TT |
8352 | |
8353 | case DW_TAG_imported_unit: | |
8354 | process_imported_unit_die (die, cu); | |
8355 | break; | |
8356 | ||
c906108c | 8357 | default: |
e7c27a73 | 8358 | new_symbol (die, NULL, cu); |
c906108c SS |
8359 | break; |
8360 | } | |
adde2bff DE |
8361 | |
8362 | do_cleanups (in_process); | |
c906108c | 8363 | } |
ca69b9e6 DE |
8364 | \f |
8365 | /* DWARF name computation. */ | |
c906108c | 8366 | |
94af9270 KS |
8367 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8368 | needs to have the name of the scope prepended to the name listed in the | |
8369 | die. */ | |
8370 | ||
8371 | static int | |
8372 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8373 | { | |
1c809c68 TT |
8374 | struct attribute *attr; |
8375 | ||
94af9270 KS |
8376 | switch (die->tag) |
8377 | { | |
8378 | case DW_TAG_namespace: | |
8379 | case DW_TAG_typedef: | |
8380 | case DW_TAG_class_type: | |
8381 | case DW_TAG_interface_type: | |
8382 | case DW_TAG_structure_type: | |
8383 | case DW_TAG_union_type: | |
8384 | case DW_TAG_enumeration_type: | |
8385 | case DW_TAG_enumerator: | |
8386 | case DW_TAG_subprogram: | |
08a76f8a | 8387 | case DW_TAG_inlined_subroutine: |
94af9270 | 8388 | case DW_TAG_member: |
74921315 | 8389 | case DW_TAG_imported_declaration: |
94af9270 KS |
8390 | return 1; |
8391 | ||
8392 | case DW_TAG_variable: | |
c2b0a229 | 8393 | case DW_TAG_constant: |
94af9270 KS |
8394 | /* We only need to prefix "globally" visible variables. These include |
8395 | any variable marked with DW_AT_external or any variable that | |
8396 | lives in a namespace. [Variables in anonymous namespaces | |
8397 | require prefixing, but they are not DW_AT_external.] */ | |
8398 | ||
8399 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8400 | { | |
8401 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8402 | |
94af9270 KS |
8403 | return die_needs_namespace (die_specification (die, &spec_cu), |
8404 | spec_cu); | |
8405 | } | |
8406 | ||
1c809c68 | 8407 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8408 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8409 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8410 | return 0; |
8411 | /* A variable in a lexical block of some kind does not need a | |
8412 | namespace, even though in C++ such variables may be external | |
8413 | and have a mangled name. */ | |
8414 | if (die->parent->tag == DW_TAG_lexical_block | |
8415 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8416 | || die->parent->tag == DW_TAG_catch_block |
8417 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8418 | return 0; |
8419 | return 1; | |
94af9270 KS |
8420 | |
8421 | default: | |
8422 | return 0; | |
8423 | } | |
8424 | } | |
8425 | ||
98bfdba5 PA |
8426 | /* Retrieve the last character from a mem_file. */ |
8427 | ||
8428 | static void | |
8429 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
8430 | { | |
8431 | char *last_char_p = (char *) object; | |
8432 | ||
8433 | if (length > 0) | |
8434 | *last_char_p = buffer[length - 1]; | |
8435 | } | |
8436 | ||
94af9270 | 8437 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 8438 | compute the physname for the object, which include a method's: |
9c37b5ae | 8439 | - formal parameters (C++), |
a766d390 | 8440 | - receiver type (Go), |
a766d390 DE |
8441 | |
8442 | The term "physname" is a bit confusing. | |
8443 | For C++, for example, it is the demangled name. | |
8444 | For Go, for example, it's the mangled name. | |
94af9270 | 8445 | |
af6b7be1 JB |
8446 | For Ada, return the DIE's linkage name rather than the fully qualified |
8447 | name. PHYSNAME is ignored.. | |
8448 | ||
94af9270 KS |
8449 | The result is allocated on the objfile_obstack and canonicalized. */ |
8450 | ||
8451 | static const char * | |
15d034d0 TT |
8452 | dwarf2_compute_name (const char *name, |
8453 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8454 | int physname) |
8455 | { | |
bb5ed363 DE |
8456 | struct objfile *objfile = cu->objfile; |
8457 | ||
94af9270 KS |
8458 | if (name == NULL) |
8459 | name = dwarf2_name (die, cu); | |
8460 | ||
2ee7123e DE |
8461 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
8462 | but otherwise compute it by typename_concat inside GDB. | |
8463 | FIXME: Actually this is not really true, or at least not always true. | |
8464 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
8465 | Fortran names because there is no mangling standard. So new_symbol_full | |
8466 | will set the demangled name to the result of dwarf2_full_name, and it is | |
8467 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
8468 | if (cu->language == language_ada |
8469 | || (cu->language == language_fortran && physname)) | |
8470 | { | |
8471 | /* For Ada unit, we prefer the linkage name over the name, as | |
8472 | the former contains the exported name, which the user expects | |
8473 | to be able to reference. Ideally, we want the user to be able | |
8474 | to reference this entity using either natural or linkage name, | |
8475 | but we haven't started looking at this enhancement yet. */ | |
2ee7123e | 8476 | const char *linkage_name; |
f55ee35c | 8477 | |
2ee7123e DE |
8478 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
8479 | if (linkage_name == NULL) | |
8480 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8481 | if (linkage_name != NULL) | |
8482 | return linkage_name; | |
f55ee35c JK |
8483 | } |
8484 | ||
94af9270 KS |
8485 | /* These are the only languages we know how to qualify names in. */ |
8486 | if (name != NULL | |
9c37b5ae | 8487 | && (cu->language == language_cplus |
c44af4eb TT |
8488 | || cu->language == language_fortran || cu->language == language_d |
8489 | || cu->language == language_rust)) | |
94af9270 KS |
8490 | { |
8491 | if (die_needs_namespace (die, cu)) | |
8492 | { | |
8493 | long length; | |
0d5cff50 | 8494 | const char *prefix; |
94af9270 | 8495 | struct ui_file *buf; |
34a68019 | 8496 | const char *canonical_name = NULL; |
94af9270 KS |
8497 | |
8498 | prefix = determine_prefix (die, cu); | |
8499 | buf = mem_fileopen (); | |
8500 | if (*prefix != '\0') | |
8501 | { | |
f55ee35c JK |
8502 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8503 | physname, cu); | |
9a619af0 | 8504 | |
94af9270 KS |
8505 | fputs_unfiltered (prefixed_name, buf); |
8506 | xfree (prefixed_name); | |
8507 | } | |
8508 | else | |
62d5b8da | 8509 | fputs_unfiltered (name, buf); |
94af9270 | 8510 | |
98bfdba5 PA |
8511 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8512 | as children with DW_TAG_template_type_param or | |
8513 | DW_TAG_value_type_param. If the latter, add them to the name | |
8514 | here. If the name already has template parameters, then | |
8515 | skip this step; some versions of GCC emit both, and | |
8516 | it is more efficient to use the pre-computed name. | |
8517 | ||
8518 | Something to keep in mind about this process: it is very | |
8519 | unlikely, or in some cases downright impossible, to produce | |
8520 | something that will match the mangled name of a function. | |
8521 | If the definition of the function has the same debug info, | |
8522 | we should be able to match up with it anyway. But fallbacks | |
8523 | using the minimal symbol, for instance to find a method | |
8524 | implemented in a stripped copy of libstdc++, will not work. | |
8525 | If we do not have debug info for the definition, we will have to | |
8526 | match them up some other way. | |
8527 | ||
8528 | When we do name matching there is a related problem with function | |
8529 | templates; two instantiated function templates are allowed to | |
8530 | differ only by their return types, which we do not add here. */ | |
8531 | ||
8532 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8533 | { | |
8534 | struct attribute *attr; | |
8535 | struct die_info *child; | |
8536 | int first = 1; | |
8537 | ||
8538 | die->building_fullname = 1; | |
8539 | ||
8540 | for (child = die->child; child != NULL; child = child->sibling) | |
8541 | { | |
8542 | struct type *type; | |
12df843f | 8543 | LONGEST value; |
d521ce57 | 8544 | const gdb_byte *bytes; |
98bfdba5 PA |
8545 | struct dwarf2_locexpr_baton *baton; |
8546 | struct value *v; | |
8547 | ||
8548 | if (child->tag != DW_TAG_template_type_param | |
8549 | && child->tag != DW_TAG_template_value_param) | |
8550 | continue; | |
8551 | ||
8552 | if (first) | |
8553 | { | |
8554 | fputs_unfiltered ("<", buf); | |
8555 | first = 0; | |
8556 | } | |
8557 | else | |
8558 | fputs_unfiltered (", ", buf); | |
8559 | ||
8560 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8561 | if (attr == NULL) | |
8562 | { | |
8563 | complaint (&symfile_complaints, | |
8564 | _("template parameter missing DW_AT_type")); | |
8565 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8566 | continue; | |
8567 | } | |
8568 | type = die_type (child, cu); | |
8569 | ||
8570 | if (child->tag == DW_TAG_template_type_param) | |
8571 | { | |
79d43c61 | 8572 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8573 | continue; |
8574 | } | |
8575 | ||
8576 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8577 | if (attr == NULL) | |
8578 | { | |
8579 | complaint (&symfile_complaints, | |
3e43a32a MS |
8580 | _("template parameter missing " |
8581 | "DW_AT_const_value")); | |
98bfdba5 PA |
8582 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8583 | continue; | |
8584 | } | |
8585 | ||
8586 | dwarf2_const_value_attr (attr, type, name, | |
8587 | &cu->comp_unit_obstack, cu, | |
8588 | &value, &bytes, &baton); | |
8589 | ||
8590 | if (TYPE_NOSIGN (type)) | |
8591 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8592 | changed, this can use value_print instead. */ | |
8593 | c_printchar (value, type, buf); | |
8594 | else | |
8595 | { | |
8596 | struct value_print_options opts; | |
8597 | ||
8598 | if (baton != NULL) | |
8599 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8600 | baton->data, | |
8601 | baton->size, | |
8602 | baton->per_cu); | |
8603 | else if (bytes != NULL) | |
8604 | { | |
8605 | v = allocate_value (type); | |
8606 | memcpy (value_contents_writeable (v), bytes, | |
8607 | TYPE_LENGTH (type)); | |
8608 | } | |
8609 | else | |
8610 | v = value_from_longest (type, value); | |
8611 | ||
3e43a32a MS |
8612 | /* Specify decimal so that we do not depend on |
8613 | the radix. */ | |
98bfdba5 PA |
8614 | get_formatted_print_options (&opts, 'd'); |
8615 | opts.raw = 1; | |
8616 | value_print (v, buf, &opts); | |
8617 | release_value (v); | |
8618 | value_free (v); | |
8619 | } | |
8620 | } | |
8621 | ||
8622 | die->building_fullname = 0; | |
8623 | ||
8624 | if (!first) | |
8625 | { | |
8626 | /* Close the argument list, with a space if necessary | |
8627 | (nested templates). */ | |
8628 | char last_char = '\0'; | |
8629 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8630 | if (last_char == '>') | |
8631 | fputs_unfiltered (" >", buf); | |
8632 | else | |
8633 | fputs_unfiltered (">", buf); | |
8634 | } | |
8635 | } | |
8636 | ||
9c37b5ae | 8637 | /* For C++ methods, append formal parameter type |
94af9270 | 8638 | information, if PHYSNAME. */ |
6e70227d | 8639 | |
94af9270 | 8640 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 8641 | && cu->language == language_cplus) |
94af9270 KS |
8642 | { |
8643 | struct type *type = read_type_die (die, cu); | |
8644 | ||
79d43c61 TT |
8645 | c_type_print_args (type, buf, 1, cu->language, |
8646 | &type_print_raw_options); | |
94af9270 | 8647 | |
9c37b5ae | 8648 | if (cu->language == language_cplus) |
94af9270 | 8649 | { |
60430eff DJ |
8650 | /* Assume that an artificial first parameter is |
8651 | "this", but do not crash if it is not. RealView | |
8652 | marks unnamed (and thus unused) parameters as | |
8653 | artificial; there is no way to differentiate | |
8654 | the two cases. */ | |
94af9270 KS |
8655 | if (TYPE_NFIELDS (type) > 0 |
8656 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8657 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8658 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8659 | 0)))) | |
94af9270 KS |
8660 | fputs_unfiltered (" const", buf); |
8661 | } | |
8662 | } | |
8663 | ||
322a8516 | 8664 | std::string intermediate_name = ui_file_as_string (buf); |
94af9270 KS |
8665 | ui_file_delete (buf); |
8666 | ||
8667 | if (cu->language == language_cplus) | |
34a68019 | 8668 | canonical_name |
322a8516 | 8669 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
8670 | &objfile->per_bfd->storage_obstack); |
8671 | ||
8672 | /* If we only computed INTERMEDIATE_NAME, or if | |
8673 | INTERMEDIATE_NAME is already canonical, then we need to | |
8674 | copy it to the appropriate obstack. */ | |
322a8516 | 8675 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
8676 | name = ((const char *) |
8677 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
8678 | intermediate_name.c_str (), |
8679 | intermediate_name.length ())); | |
34a68019 TT |
8680 | else |
8681 | name = canonical_name; | |
94af9270 KS |
8682 | } |
8683 | } | |
8684 | ||
8685 | return name; | |
8686 | } | |
8687 | ||
0114d602 DJ |
8688 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8689 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 8690 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
8691 | not have a name. NAME may either be from a previous call to |
8692 | dwarf2_name or NULL. | |
8693 | ||
9c37b5ae | 8694 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
8695 | |
8696 | static const char * | |
15d034d0 | 8697 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8698 | { |
94af9270 KS |
8699 | return dwarf2_compute_name (name, die, cu, 0); |
8700 | } | |
0114d602 | 8701 | |
94af9270 KS |
8702 | /* Construct a physname for the given DIE in CU. NAME may either be |
8703 | from a previous call to dwarf2_name or NULL. The result will be | |
8704 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8705 | name. | |
0114d602 | 8706 | |
9c37b5ae | 8707 | The output string will be canonicalized (if C++). */ |
0114d602 | 8708 | |
94af9270 | 8709 | static const char * |
15d034d0 | 8710 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8711 | { |
bb5ed363 | 8712 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8713 | const char *retval, *mangled = NULL, *canon = NULL; |
8714 | struct cleanup *back_to; | |
8715 | int need_copy = 1; | |
8716 | ||
8717 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8718 | on its own. */ | |
8719 | if (!die_needs_namespace (die, cu)) | |
8720 | return dwarf2_compute_name (name, die, cu, 1); | |
8721 | ||
8722 | back_to = make_cleanup (null_cleanup, NULL); | |
8723 | ||
7d45c7c3 KB |
8724 | mangled = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
8725 | if (mangled == NULL) | |
8726 | mangled = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
900e11f9 | 8727 | |
e98c9e7c TT |
8728 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
8729 | See https://github.com/rust-lang/rust/issues/32925. */ | |
8730 | if (cu->language == language_rust && mangled != NULL | |
8731 | && strchr (mangled, '{') != NULL) | |
8732 | mangled = NULL; | |
8733 | ||
900e11f9 JK |
8734 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
8735 | has computed. */ | |
7d45c7c3 | 8736 | if (mangled != NULL) |
900e11f9 JK |
8737 | { |
8738 | char *demangled; | |
8739 | ||
900e11f9 JK |
8740 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
8741 | type. It is easier for GDB users to search for such functions as | |
8742 | `name(params)' than `long name(params)'. In such case the minimal | |
8743 | symbol names do not match the full symbol names but for template | |
8744 | functions there is never a need to look up their definition from their | |
8745 | declaration so the only disadvantage remains the minimal symbol | |
8746 | variant `long name(params)' does not have the proper inferior type. | |
8747 | */ | |
8748 | ||
a766d390 DE |
8749 | if (cu->language == language_go) |
8750 | { | |
8751 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8752 | new_symbol_full assumes we return the mangled name. | |
8753 | This just undoes that lie until things are cleaned up. */ | |
8754 | demangled = NULL; | |
8755 | } | |
8756 | else | |
8757 | { | |
8de20a37 | 8758 | demangled = gdb_demangle (mangled, |
9c37b5ae | 8759 | (DMGL_PARAMS | DMGL_ANSI | DMGL_RET_DROP)); |
a766d390 | 8760 | } |
900e11f9 JK |
8761 | if (demangled) |
8762 | { | |
8763 | make_cleanup (xfree, demangled); | |
8764 | canon = demangled; | |
8765 | } | |
8766 | else | |
8767 | { | |
8768 | canon = mangled; | |
8769 | need_copy = 0; | |
8770 | } | |
8771 | } | |
8772 | ||
8773 | if (canon == NULL || check_physname) | |
8774 | { | |
8775 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8776 | ||
8777 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8778 | { | |
8779 | /* It may not mean a bug in GDB. The compiler could also | |
8780 | compute DW_AT_linkage_name incorrectly. But in such case | |
8781 | GDB would need to be bug-to-bug compatible. */ | |
8782 | ||
8783 | complaint (&symfile_complaints, | |
8784 | _("Computed physname <%s> does not match demangled <%s> " | |
8785 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8786 | physname, canon, mangled, die->offset.sect_off, |
8787 | objfile_name (objfile)); | |
900e11f9 JK |
8788 | |
8789 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8790 | is available here - over computed PHYSNAME. It is safer | |
8791 | against both buggy GDB and buggy compilers. */ | |
8792 | ||
8793 | retval = canon; | |
8794 | } | |
8795 | else | |
8796 | { | |
8797 | retval = physname; | |
8798 | need_copy = 0; | |
8799 | } | |
8800 | } | |
8801 | else | |
8802 | retval = canon; | |
8803 | ||
8804 | if (need_copy) | |
224c3ddb SM |
8805 | retval = ((const char *) |
8806 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
8807 | retval, strlen (retval))); | |
900e11f9 JK |
8808 | |
8809 | do_cleanups (back_to); | |
8810 | return retval; | |
0114d602 DJ |
8811 | } |
8812 | ||
74921315 KS |
8813 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
8814 | a new symbol for it. | |
8815 | ||
8816 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
8817 | ||
8818 | static int | |
8819 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
8820 | { | |
8821 | struct attribute *attr; | |
8822 | ||
8823 | /* If the die does not have a name, this is not a namespace | |
8824 | alias. */ | |
8825 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8826 | if (attr != NULL) | |
8827 | { | |
8828 | int num; | |
8829 | struct die_info *d = die; | |
8830 | struct dwarf2_cu *imported_cu = cu; | |
8831 | ||
8832 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
8833 | keep inspecting DIEs until we hit the underlying import. */ | |
8834 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
8835 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
8836 | { | |
8837 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
8838 | if (attr == NULL) | |
8839 | break; | |
8840 | ||
8841 | d = follow_die_ref (d, attr, &imported_cu); | |
8842 | if (d->tag != DW_TAG_imported_declaration) | |
8843 | break; | |
8844 | } | |
8845 | ||
8846 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
8847 | { | |
8848 | complaint (&symfile_complaints, | |
8849 | _("DIE at 0x%x has too many recursively imported " | |
8850 | "declarations"), d->offset.sect_off); | |
8851 | return 0; | |
8852 | } | |
8853 | ||
8854 | if (attr != NULL) | |
8855 | { | |
8856 | struct type *type; | |
8857 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
8858 | ||
8859 | type = get_die_type_at_offset (offset, cu->per_cu); | |
8860 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
8861 | { | |
8862 | /* This declaration is a global namespace alias. Add | |
8863 | a symbol for it whose type is the aliased namespace. */ | |
8864 | new_symbol (die, type, cu); | |
8865 | return 1; | |
8866 | } | |
8867 | } | |
8868 | } | |
8869 | ||
8870 | return 0; | |
8871 | } | |
8872 | ||
22cee43f PMR |
8873 | /* Return the using directives repository (global or local?) to use in the |
8874 | current context for LANGUAGE. | |
8875 | ||
8876 | For Ada, imported declarations can materialize renamings, which *may* be | |
8877 | global. However it is impossible (for now?) in DWARF to distinguish | |
8878 | "external" imported declarations and "static" ones. As all imported | |
8879 | declarations seem to be static in all other languages, make them all CU-wide | |
8880 | global only in Ada. */ | |
8881 | ||
8882 | static struct using_direct ** | |
8883 | using_directives (enum language language) | |
8884 | { | |
8885 | if (language == language_ada && context_stack_depth == 0) | |
8886 | return &global_using_directives; | |
8887 | else | |
8888 | return &local_using_directives; | |
8889 | } | |
8890 | ||
27aa8d6a SW |
8891 | /* Read the import statement specified by the given die and record it. */ |
8892 | ||
8893 | static void | |
8894 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8895 | { | |
bb5ed363 | 8896 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8897 | struct attribute *import_attr; |
32019081 | 8898 | struct die_info *imported_die, *child_die; |
de4affc9 | 8899 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8900 | const char *imported_name; |
794684b6 | 8901 | const char *imported_name_prefix; |
13387711 SW |
8902 | const char *canonical_name; |
8903 | const char *import_alias; | |
8904 | const char *imported_declaration = NULL; | |
794684b6 | 8905 | const char *import_prefix; |
32019081 JK |
8906 | VEC (const_char_ptr) *excludes = NULL; |
8907 | struct cleanup *cleanups; | |
13387711 | 8908 | |
27aa8d6a SW |
8909 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8910 | if (import_attr == NULL) | |
8911 | { | |
8912 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8913 | dwarf_tag_name (die->tag)); | |
8914 | return; | |
8915 | } | |
8916 | ||
de4affc9 CC |
8917 | imported_cu = cu; |
8918 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8919 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8920 | if (imported_name == NULL) |
8921 | { | |
8922 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8923 | ||
8924 | The import in the following code: | |
8925 | namespace A | |
8926 | { | |
8927 | typedef int B; | |
8928 | } | |
8929 | ||
8930 | int main () | |
8931 | { | |
8932 | using A::B; | |
8933 | B b; | |
8934 | return b; | |
8935 | } | |
8936 | ||
8937 | ... | |
8938 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8939 | <52> DW_AT_decl_file : 1 | |
8940 | <53> DW_AT_decl_line : 6 | |
8941 | <54> DW_AT_import : <0x75> | |
8942 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8943 | <59> DW_AT_name : B | |
8944 | <5b> DW_AT_decl_file : 1 | |
8945 | <5c> DW_AT_decl_line : 2 | |
8946 | <5d> DW_AT_type : <0x6e> | |
8947 | ... | |
8948 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8949 | <76> DW_AT_byte_size : 4 | |
8950 | <77> DW_AT_encoding : 5 (signed) | |
8951 | ||
8952 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8953 | This case will be ignored until the gcc bug is fixed. */ | |
8954 | return; | |
8955 | } | |
8956 | ||
82856980 SW |
8957 | /* Figure out the local name after import. */ |
8958 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8959 | |
794684b6 SW |
8960 | /* Figure out where the statement is being imported to. */ |
8961 | import_prefix = determine_prefix (die, cu); | |
8962 | ||
8963 | /* Figure out what the scope of the imported die is and prepend it | |
8964 | to the name of the imported die. */ | |
de4affc9 | 8965 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8966 | |
f55ee35c JK |
8967 | if (imported_die->tag != DW_TAG_namespace |
8968 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8969 | { |
13387711 SW |
8970 | imported_declaration = imported_name; |
8971 | canonical_name = imported_name_prefix; | |
794684b6 | 8972 | } |
13387711 | 8973 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 8974 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
8975 | imported_name_prefix, |
8976 | (cu->language == language_d ? "." : "::"), | |
8977 | imported_name, (char *) NULL); | |
13387711 SW |
8978 | else |
8979 | canonical_name = imported_name; | |
794684b6 | 8980 | |
32019081 JK |
8981 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8982 | ||
8983 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8984 | for (child_die = die->child; child_die && child_die->tag; | |
8985 | child_die = sibling_die (child_die)) | |
8986 | { | |
8987 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8988 | represented by an imported module entry with an import attribute | |
8989 | referring to the module and owned entries corresponding to those | |
8990 | entities that are renamed as part of being imported. */ | |
8991 | ||
8992 | if (child_die->tag != DW_TAG_imported_declaration) | |
8993 | { | |
8994 | complaint (&symfile_complaints, | |
8995 | _("child DW_TAG_imported_declaration expected " | |
8996 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 8997 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8998 | continue; |
8999 | } | |
9000 | ||
9001 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9002 | if (import_attr == NULL) | |
9003 | { | |
9004 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9005 | dwarf_tag_name (child_die->tag)); | |
9006 | continue; | |
9007 | } | |
9008 | ||
9009 | imported_cu = cu; | |
9010 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9011 | &imported_cu); | |
9012 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9013 | if (imported_name == NULL) | |
9014 | { | |
9015 | complaint (&symfile_complaints, | |
9016 | _("child DW_TAG_imported_declaration has unknown " | |
9017 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 9018 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
9019 | continue; |
9020 | } | |
9021 | ||
9022 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
9023 | ||
9024 | process_die (child_die, cu); | |
9025 | } | |
9026 | ||
22cee43f PMR |
9027 | add_using_directive (using_directives (cu->language), |
9028 | import_prefix, | |
9029 | canonical_name, | |
9030 | import_alias, | |
9031 | imported_declaration, | |
9032 | excludes, | |
9033 | 0, | |
9034 | &objfile->objfile_obstack); | |
32019081 JK |
9035 | |
9036 | do_cleanups (cleanups); | |
27aa8d6a SW |
9037 | } |
9038 | ||
f4dc4d17 | 9039 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 9040 | |
cb1df416 DJ |
9041 | static void |
9042 | free_cu_line_header (void *arg) | |
9043 | { | |
9a3c8263 | 9044 | struct dwarf2_cu *cu = (struct dwarf2_cu *) arg; |
cb1df416 DJ |
9045 | |
9046 | free_line_header (cu->line_header); | |
9047 | cu->line_header = NULL; | |
9048 | } | |
9049 | ||
1b80a9fa JK |
9050 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9051 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9052 | this, it was first present in GCC release 4.3.0. */ | |
9053 | ||
9054 | static int | |
9055 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9056 | { | |
9057 | if (!cu->checked_producer) | |
9058 | check_producer (cu); | |
9059 | ||
9060 | return cu->producer_is_gcc_lt_4_3; | |
9061 | } | |
9062 | ||
9291a0cd TT |
9063 | static void |
9064 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 9065 | const char **name, const char **comp_dir) |
9291a0cd | 9066 | { |
9291a0cd TT |
9067 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9068 | is not a source language identifier. */ | |
7d45c7c3 KB |
9069 | *name = dwarf2_string_attr (die, DW_AT_name, cu); |
9070 | *comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9071 | |
7d45c7c3 KB |
9072 | if (*comp_dir == NULL |
9073 | && producer_is_gcc_lt_4_3 (cu) && *name != NULL | |
9074 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 9075 | { |
15d034d0 TT |
9076 | char *d = ldirname (*name); |
9077 | ||
9078 | *comp_dir = d; | |
9079 | if (d != NULL) | |
9080 | make_cleanup (xfree, d); | |
9291a0cd TT |
9081 | } |
9082 | if (*comp_dir != NULL) | |
9083 | { | |
9084 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9085 | directory, get rid of it. */ | |
e6a959d6 | 9086 | const char *cp = strchr (*comp_dir, ':'); |
9291a0cd TT |
9087 | |
9088 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
9089 | *comp_dir = cp + 1; | |
9090 | } | |
9091 | ||
9092 | if (*name == NULL) | |
9093 | *name = "<unknown>"; | |
9094 | } | |
9095 | ||
f4dc4d17 DE |
9096 | /* Handle DW_AT_stmt_list for a compilation unit. |
9097 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9098 | COMP_DIR is the compilation directory. LOWPC is passed to |
9099 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9100 | |
9101 | static void | |
9102 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9103 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9104 | { |
527f3840 | 9105 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9106 | struct attribute *attr; |
527f3840 JK |
9107 | unsigned int line_offset; |
9108 | struct line_header line_header_local; | |
9109 | hashval_t line_header_local_hash; | |
9110 | unsigned u; | |
9111 | void **slot; | |
9112 | int decode_mapping; | |
2ab95328 | 9113 | |
f4dc4d17 DE |
9114 | gdb_assert (! cu->per_cu->is_debug_types); |
9115 | ||
2ab95328 | 9116 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9117 | if (attr == NULL) |
9118 | return; | |
9119 | ||
9120 | line_offset = DW_UNSND (attr); | |
9121 | ||
9122 | /* The line header hash table is only created if needed (it exists to | |
9123 | prevent redundant reading of the line table for partial_units). | |
9124 | If we're given a partial_unit, we'll need it. If we're given a | |
9125 | compile_unit, then use the line header hash table if it's already | |
9126 | created, but don't create one just yet. */ | |
9127 | ||
9128 | if (dwarf2_per_objfile->line_header_hash == NULL | |
9129 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 9130 | { |
527f3840 JK |
9131 | dwarf2_per_objfile->line_header_hash |
9132 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
9133 | line_header_eq_voidp, | |
9134 | free_line_header_voidp, | |
9135 | &objfile->objfile_obstack, | |
9136 | hashtab_obstack_allocate, | |
9137 | dummy_obstack_deallocate); | |
9138 | } | |
2ab95328 | 9139 | |
527f3840 JK |
9140 | line_header_local.offset.sect_off = line_offset; |
9141 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; | |
9142 | line_header_local_hash = line_header_hash (&line_header_local); | |
9143 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
9144 | { | |
9145 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9146 | &line_header_local, | |
9147 | line_header_local_hash, NO_INSERT); | |
9148 | ||
9149 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
9150 | is not present in *SLOT (since if there is something in *SLOT then | |
9151 | it will be for a partial_unit). */ | |
9152 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 9153 | { |
527f3840 | 9154 | gdb_assert (*slot != NULL); |
9a3c8263 | 9155 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 9156 | return; |
dee91e82 | 9157 | } |
2ab95328 | 9158 | } |
527f3840 JK |
9159 | |
9160 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
9161 | We always have to call also dwarf_decode_lines for it. */ | |
9162 | cu->line_header = dwarf_decode_line_header (line_offset, cu); | |
9163 | if (cu->line_header == NULL) | |
9164 | return; | |
9165 | ||
9166 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
9167 | slot = NULL; | |
9168 | else | |
9169 | { | |
9170 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9171 | &line_header_local, | |
9172 | line_header_local_hash, INSERT); | |
9173 | gdb_assert (slot != NULL); | |
9174 | } | |
9175 | if (slot != NULL && *slot == NULL) | |
9176 | { | |
9177 | /* This newly decoded line number information unit will be owned | |
9178 | by line_header_hash hash table. */ | |
9179 | *slot = cu->line_header; | |
9180 | } | |
9181 | else | |
9182 | { | |
9183 | /* We cannot free any current entry in (*slot) as that struct line_header | |
9184 | may be already used by multiple CUs. Create only temporary decoded | |
9185 | line_header for this CU - it may happen at most once for each line | |
9186 | number information unit. And if we're not using line_header_hash | |
9187 | then this is what we want as well. */ | |
9188 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
9189 | make_cleanup (free_cu_line_header, cu); | |
9190 | } | |
9191 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
9192 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
9193 | decode_mapping); | |
2ab95328 TT |
9194 | } |
9195 | ||
95554aad | 9196 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 9197 | |
c906108c | 9198 | static void |
e7c27a73 | 9199 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9200 | { |
dee91e82 | 9201 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 9202 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
debd256d | 9203 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 9204 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9205 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9206 | struct attribute *attr; | |
15d034d0 TT |
9207 | const char *name = NULL; |
9208 | const char *comp_dir = NULL; | |
c906108c | 9209 | struct die_info *child_die; |
e142c38c | 9210 | CORE_ADDR baseaddr; |
6e70227d | 9211 | |
e142c38c | 9212 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9213 | |
fae299cd | 9214 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9215 | |
9216 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9217 | from finish_block. */ | |
2acceee2 | 9218 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 9219 | lowpc = highpc; |
3e29f34a | 9220 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 9221 | |
9291a0cd | 9222 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 9223 | |
95554aad | 9224 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9225 | |
f4b8a18d KW |
9226 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9227 | standardised yet. As a workaround for the language detection we fall | |
9228 | back to the DW_AT_producer string. */ | |
9229 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9230 | cu->language = language_opencl; | |
9231 | ||
3019eac3 DE |
9232 | /* Similar hack for Go. */ |
9233 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9234 | set_cu_language (DW_LANG_Go, cu); | |
9235 | ||
f4dc4d17 | 9236 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
9237 | |
9238 | /* Decode line number information if present. We do this before | |
9239 | processing child DIEs, so that the line header table is available | |
9240 | for DW_AT_decl_file. */ | |
c3b7b696 | 9241 | handle_DW_AT_stmt_list (die, cu, comp_dir, lowpc); |
3019eac3 DE |
9242 | |
9243 | /* Process all dies in compilation unit. */ | |
9244 | if (die->child != NULL) | |
9245 | { | |
9246 | child_die = die->child; | |
9247 | while (child_die && child_die->tag) | |
9248 | { | |
9249 | process_die (child_die, cu); | |
9250 | child_die = sibling_die (child_die); | |
9251 | } | |
9252 | } | |
9253 | ||
9254 | /* Decode macro information, if present. Dwarf 2 macro information | |
9255 | refers to information in the line number info statement program | |
9256 | header, so we can only read it if we've read the header | |
9257 | successfully. */ | |
9258 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
9259 | if (attr && cu->line_header) | |
9260 | { | |
9261 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9262 | complaint (&symfile_complaints, | |
9263 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
9264 | ||
43f3e411 | 9265 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
9266 | } |
9267 | else | |
9268 | { | |
9269 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9270 | if (attr && cu->line_header) | |
9271 | { | |
9272 | unsigned int macro_offset = DW_UNSND (attr); | |
9273 | ||
43f3e411 | 9274 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
9275 | } |
9276 | } | |
9277 | ||
9278 | do_cleanups (back_to); | |
9279 | } | |
9280 | ||
f4dc4d17 DE |
9281 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9282 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9283 | symtabs with another TU and the symtabs have already been created | |
9284 | then restore those symtabs in the line header. | |
9285 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9286 | |
9287 | static void | |
f4dc4d17 | 9288 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9289 | { |
f4dc4d17 DE |
9290 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
9291 | struct type_unit_group *tu_group; | |
9292 | int first_time; | |
9293 | struct line_header *lh; | |
3019eac3 | 9294 | struct attribute *attr; |
f4dc4d17 | 9295 | unsigned int i, line_offset; |
0186c6a7 | 9296 | struct signatured_type *sig_type; |
3019eac3 | 9297 | |
f4dc4d17 | 9298 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9299 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9300 | |
f4dc4d17 | 9301 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9302 | |
f4dc4d17 | 9303 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9304 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9305 | if (sig_type->type_unit_group == NULL) |
9306 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9307 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9308 | |
9309 | /* If we've already processed this stmt_list there's no real need to | |
9310 | do it again, we could fake it and just recreate the part we need | |
9311 | (file name,index -> symtab mapping). If data shows this optimization | |
9312 | is useful we can do it then. */ | |
43f3e411 | 9313 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
9314 | |
9315 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9316 | debug info. */ | |
9317 | lh = NULL; | |
9318 | if (attr != NULL) | |
3019eac3 | 9319 | { |
f4dc4d17 DE |
9320 | line_offset = DW_UNSND (attr); |
9321 | lh = dwarf_decode_line_header (line_offset, cu); | |
9322 | } | |
9323 | if (lh == NULL) | |
9324 | { | |
9325 | if (first_time) | |
9326 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9327 | else | |
9328 | { | |
9329 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 9330 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9331 | } |
f4dc4d17 | 9332 | return; |
3019eac3 DE |
9333 | } |
9334 | ||
f4dc4d17 DE |
9335 | cu->line_header = lh; |
9336 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 9337 | |
f4dc4d17 DE |
9338 | if (first_time) |
9339 | { | |
43f3e411 | 9340 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 9341 | |
1fd60fc0 DE |
9342 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
9343 | still initializing it, and our caller (a few levels up) | |
9344 | process_full_type_unit still needs to know if this is the first | |
9345 | time. */ | |
9346 | ||
f4dc4d17 DE |
9347 | tu_group->num_symtabs = lh->num_file_names; |
9348 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 9349 | |
f4dc4d17 DE |
9350 | for (i = 0; i < lh->num_file_names; ++i) |
9351 | { | |
d521ce57 | 9352 | const char *dir = NULL; |
f4dc4d17 | 9353 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 9354 | |
afa6c9ab | 9355 | if (fe->dir_index && lh->include_dirs != NULL) |
f4dc4d17 | 9356 | dir = lh->include_dirs[fe->dir_index - 1]; |
4d663531 | 9357 | dwarf2_start_subfile (fe->name, dir); |
3019eac3 | 9358 | |
f4dc4d17 DE |
9359 | if (current_subfile->symtab == NULL) |
9360 | { | |
9361 | /* NOTE: start_subfile will recognize when it's been passed | |
9362 | a file it has already seen. So we can't assume there's a | |
43f3e411 | 9363 | simple mapping from lh->file_names to subfiles, plus |
f4dc4d17 | 9364 | lh->file_names may contain dups. */ |
43f3e411 DE |
9365 | current_subfile->symtab |
9366 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
9367 | } |
9368 | ||
9369 | fe->symtab = current_subfile->symtab; | |
9370 | tu_group->symtabs[i] = fe->symtab; | |
9371 | } | |
9372 | } | |
9373 | else | |
3019eac3 | 9374 | { |
0ab9ce85 | 9375 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 DE |
9376 | |
9377 | for (i = 0; i < lh->num_file_names; ++i) | |
9378 | { | |
9379 | struct file_entry *fe = &lh->file_names[i]; | |
9380 | ||
9381 | fe->symtab = tu_group->symtabs[i]; | |
9382 | } | |
3019eac3 DE |
9383 | } |
9384 | ||
f4dc4d17 DE |
9385 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9386 | so they don't have a "real" (so to speak) symtab anyway. | |
9387 | There is later code that will assign the main symtab to all symbols | |
9388 | that don't have one. We need to handle the case of a symbol with a | |
9389 | missing symtab (DW_AT_decl_file) anyway. */ | |
9390 | } | |
3019eac3 | 9391 | |
f4dc4d17 DE |
9392 | /* Process DW_TAG_type_unit. |
9393 | For TUs we want to skip the first top level sibling if it's not the | |
9394 | actual type being defined by this TU. In this case the first top | |
9395 | level sibling is there to provide context only. */ | |
3019eac3 | 9396 | |
f4dc4d17 DE |
9397 | static void |
9398 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9399 | { | |
9400 | struct die_info *child_die; | |
3019eac3 | 9401 | |
f4dc4d17 DE |
9402 | prepare_one_comp_unit (cu, die, language_minimal); |
9403 | ||
9404 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9405 | We do this before processing child DIEs, so that the line header table | |
9406 | is available for DW_AT_decl_file. */ | |
9407 | setup_type_unit_groups (die, cu); | |
9408 | ||
9409 | if (die->child != NULL) | |
9410 | { | |
9411 | child_die = die->child; | |
9412 | while (child_die && child_die->tag) | |
9413 | { | |
9414 | process_die (child_die, cu); | |
9415 | child_die = sibling_die (child_die); | |
9416 | } | |
9417 | } | |
3019eac3 DE |
9418 | } |
9419 | \f | |
80626a55 DE |
9420 | /* DWO/DWP files. |
9421 | ||
9422 | http://gcc.gnu.org/wiki/DebugFission | |
9423 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9424 | ||
9425 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9426 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9427 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9428 | |
9429 | static hashval_t | |
9430 | hash_dwo_file (const void *item) | |
9431 | { | |
9a3c8263 | 9432 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 9433 | hashval_t hash; |
3019eac3 | 9434 | |
a2ce51a0 DE |
9435 | hash = htab_hash_string (dwo_file->dwo_name); |
9436 | if (dwo_file->comp_dir != NULL) | |
9437 | hash += htab_hash_string (dwo_file->comp_dir); | |
9438 | return hash; | |
3019eac3 DE |
9439 | } |
9440 | ||
9441 | static int | |
9442 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9443 | { | |
9a3c8263 SM |
9444 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
9445 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 9446 | |
a2ce51a0 DE |
9447 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9448 | return 0; | |
9449 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9450 | return lhs->comp_dir == rhs->comp_dir; | |
9451 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9452 | } |
9453 | ||
9454 | /* Allocate a hash table for DWO files. */ | |
9455 | ||
9456 | static htab_t | |
9457 | allocate_dwo_file_hash_table (void) | |
9458 | { | |
9459 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9460 | ||
9461 | return htab_create_alloc_ex (41, | |
9462 | hash_dwo_file, | |
9463 | eq_dwo_file, | |
9464 | NULL, | |
9465 | &objfile->objfile_obstack, | |
9466 | hashtab_obstack_allocate, | |
9467 | dummy_obstack_deallocate); | |
9468 | } | |
9469 | ||
80626a55 DE |
9470 | /* Lookup DWO file DWO_NAME. */ |
9471 | ||
9472 | static void ** | |
0ac5b59e | 9473 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9474 | { |
9475 | struct dwo_file find_entry; | |
9476 | void **slot; | |
9477 | ||
9478 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9479 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9480 | ||
9481 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9482 | find_entry.dwo_name = dwo_name; |
9483 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9484 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9485 | ||
9486 | return slot; | |
9487 | } | |
9488 | ||
3019eac3 DE |
9489 | static hashval_t |
9490 | hash_dwo_unit (const void *item) | |
9491 | { | |
9a3c8263 | 9492 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
9493 | |
9494 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9495 | return dwo_unit->signature; | |
9496 | } | |
9497 | ||
9498 | static int | |
9499 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9500 | { | |
9a3c8263 SM |
9501 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
9502 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
9503 | |
9504 | /* The signature is assumed to be unique within the DWO file. | |
9505 | So while object file CU dwo_id's always have the value zero, | |
9506 | that's OK, assuming each object file DWO file has only one CU, | |
9507 | and that's the rule for now. */ | |
9508 | return lhs->signature == rhs->signature; | |
9509 | } | |
9510 | ||
9511 | /* Allocate a hash table for DWO CUs,TUs. | |
9512 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9513 | ||
9514 | static htab_t | |
9515 | allocate_dwo_unit_table (struct objfile *objfile) | |
9516 | { | |
9517 | /* Start out with a pretty small number. | |
9518 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9519 | return htab_create_alloc_ex (3, | |
9520 | hash_dwo_unit, | |
9521 | eq_dwo_unit, | |
9522 | NULL, | |
9523 | &objfile->objfile_obstack, | |
9524 | hashtab_obstack_allocate, | |
9525 | dummy_obstack_deallocate); | |
9526 | } | |
9527 | ||
80626a55 | 9528 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9529 | |
19c3d4c9 | 9530 | struct create_dwo_cu_data |
3019eac3 DE |
9531 | { |
9532 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9533 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9534 | }; |
9535 | ||
19c3d4c9 | 9536 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9537 | |
9538 | static void | |
19c3d4c9 DE |
9539 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9540 | const gdb_byte *info_ptr, | |
9541 | struct die_info *comp_unit_die, | |
9542 | int has_children, | |
9543 | void *datap) | |
3019eac3 DE |
9544 | { |
9545 | struct dwarf2_cu *cu = reader->cu; | |
3019eac3 | 9546 | sect_offset offset = cu->per_cu->offset; |
8a0459fd | 9547 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 9548 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 9549 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9550 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9551 | struct attribute *attr; |
3019eac3 DE |
9552 | |
9553 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9554 | if (attr == NULL) | |
9555 | { | |
19c3d4c9 DE |
9556 | complaint (&symfile_complaints, |
9557 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9558 | " its dwo_id [in module %s]"), | |
9559 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
9560 | return; |
9561 | } | |
9562 | ||
3019eac3 DE |
9563 | dwo_unit->dwo_file = dwo_file; |
9564 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9565 | dwo_unit->section = section; |
3019eac3 DE |
9566 | dwo_unit->offset = offset; |
9567 | dwo_unit->length = cu->per_cu->length; | |
9568 | ||
b4f54984 | 9569 | if (dwarf_read_debug) |
4031ecc5 DE |
9570 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9571 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9572 | } |
9573 | ||
19c3d4c9 DE |
9574 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
9575 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 9576 | |
19c3d4c9 DE |
9577 | static struct dwo_unit * |
9578 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
9579 | { |
9580 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9581 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
d521ce57 | 9582 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
9583 | struct create_dwo_cu_data create_dwo_cu_data; |
9584 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
9585 | |
9586 | dwarf2_read_section (objfile, section); | |
9587 | info_ptr = section->buffer; | |
9588 | ||
9589 | if (info_ptr == NULL) | |
9590 | return NULL; | |
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; | |
80626a55 DE |
10032 | struct cleanup *cleanups; |
10033 | int i; | |
10034 | ||
73869dc2 DE |
10035 | gdb_assert (dwp_file->version == 1); |
10036 | ||
b4f54984 | 10037 | if (dwarf_read_debug) |
80626a55 | 10038 | { |
73869dc2 | 10039 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10040 | kind, |
73869dc2 | 10041 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10042 | dwp_file->name); |
10043 | } | |
10044 | ||
19ac8c2e | 10045 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10046 | Put a limit on the number of sections we look for so that bad data |
10047 | doesn't cause us to loop forever. */ | |
10048 | ||
73869dc2 | 10049 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10050 | (1 /* .debug_info or .debug_types */ \ |
10051 | + 1 /* .debug_abbrev */ \ | |
10052 | + 1 /* .debug_line */ \ | |
10053 | + 1 /* .debug_loc */ \ | |
10054 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10055 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10056 | + 1 /* trailing zero */) |
10057 | ||
10058 | memset (§ions, 0, sizeof (sections)); | |
10059 | cleanups = make_cleanup (null_cleanup, 0); | |
10060 | ||
73869dc2 | 10061 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10062 | { |
10063 | asection *sectp; | |
10064 | uint32_t section_nr = | |
10065 | read_4_bytes (dbfd, | |
73869dc2 DE |
10066 | dwp_htab->section_pool.v1.indices |
10067 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10068 | |
10069 | if (section_nr == 0) | |
10070 | break; | |
10071 | if (section_nr >= dwp_file->num_sections) | |
10072 | { | |
10073 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10074 | " [in module %s]"), | |
10075 | dwp_file->name); | |
10076 | } | |
10077 | ||
10078 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10079 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10080 | { |
10081 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10082 | " [in module %s]"), | |
10083 | dwp_file->name); | |
10084 | } | |
10085 | } | |
10086 | ||
10087 | if (i < 2 | |
a32a8923 DE |
10088 | || dwarf2_section_empty_p (§ions.info_or_types) |
10089 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10090 | { |
10091 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10092 | " [in module %s]"), | |
10093 | dwp_file->name); | |
10094 | } | |
73869dc2 | 10095 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10096 | { |
10097 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10098 | " [in module %s]"), | |
10099 | dwp_file->name); | |
10100 | } | |
10101 | ||
10102 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10103 | have dwo_unit "live" in that. At least for now. | |
10104 | ||
10105 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10106 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10107 | file, we can combine them back into a virtual DWO file to save space |
10108 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10109 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10110 | ||
2792b94d PM |
10111 | virtual_dwo_name = |
10112 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
10113 | get_section_id (§ions.abbrev), |
10114 | get_section_id (§ions.line), | |
10115 | get_section_id (§ions.loc), | |
10116 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
10117 | make_cleanup (xfree, virtual_dwo_name); |
10118 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 10119 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
10120 | /* Create one if necessary. */ |
10121 | if (*dwo_file_slot == NULL) | |
10122 | { | |
b4f54984 | 10123 | if (dwarf_read_debug) |
80626a55 DE |
10124 | { |
10125 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10126 | virtual_dwo_name); | |
10127 | } | |
10128 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10129 | dwo_file->dwo_name |
10130 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10131 | virtual_dwo_name, | |
10132 | strlen (virtual_dwo_name)); | |
0ac5b59e | 10133 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
10134 | dwo_file->sections.abbrev = sections.abbrev; |
10135 | dwo_file->sections.line = sections.line; | |
10136 | dwo_file->sections.loc = sections.loc; | |
10137 | dwo_file->sections.macinfo = sections.macinfo; | |
10138 | dwo_file->sections.macro = sections.macro; | |
10139 | dwo_file->sections.str_offsets = sections.str_offsets; | |
10140 | /* The "str" section is global to the entire DWP file. */ | |
10141 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 10142 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
10143 | there's no need to record it in dwo_file. |
10144 | Also, we can't simply record type sections in dwo_file because | |
10145 | we record a pointer into the vector in dwo_unit. As we collect more | |
10146 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
10147 | for it, invalidating all copies of pointers into the previous |
10148 | contents. */ | |
80626a55 DE |
10149 | *dwo_file_slot = dwo_file; |
10150 | } | |
10151 | else | |
10152 | { | |
b4f54984 | 10153 | if (dwarf_read_debug) |
80626a55 DE |
10154 | { |
10155 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10156 | virtual_dwo_name); | |
10157 | } | |
9a3c8263 | 10158 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 DE |
10159 | } |
10160 | do_cleanups (cleanups); | |
10161 | ||
10162 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10163 | dwo_unit->dwo_file = dwo_file; | |
10164 | dwo_unit->signature = signature; | |
8d749320 SM |
10165 | dwo_unit->section = |
10166 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 10167 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 10168 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
10169 | |
10170 | return dwo_unit; | |
10171 | } | |
10172 | ||
73869dc2 DE |
10173 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
10174 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
10175 | piece within that section used by a TU/CU, return a virtual section | |
10176 | of just that piece. */ | |
10177 | ||
10178 | static struct dwarf2_section_info | |
10179 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
10180 | bfd_size_type offset, bfd_size_type size) | |
10181 | { | |
10182 | struct dwarf2_section_info result; | |
10183 | asection *sectp; | |
10184 | ||
10185 | gdb_assert (section != NULL); | |
10186 | gdb_assert (!section->is_virtual); | |
10187 | ||
10188 | memset (&result, 0, sizeof (result)); | |
10189 | result.s.containing_section = section; | |
10190 | result.is_virtual = 1; | |
10191 | ||
10192 | if (size == 0) | |
10193 | return result; | |
10194 | ||
10195 | sectp = get_section_bfd_section (section); | |
10196 | ||
10197 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10198 | bounds of the real section. This is a pretty-rare event, so just | |
10199 | flag an error (easier) instead of a warning and trying to cope. */ | |
10200 | if (sectp == NULL | |
10201 | || offset + size > bfd_get_section_size (sectp)) | |
10202 | { | |
10203 | bfd *abfd = sectp->owner; | |
10204 | ||
10205 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10206 | " in section %s [in module %s]"), | |
10207 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10208 | objfile_name (dwarf2_per_objfile->objfile)); | |
10209 | } | |
10210 | ||
10211 | result.virtual_offset = offset; | |
10212 | result.size = size; | |
10213 | return result; | |
10214 | } | |
10215 | ||
10216 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10217 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10218 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10219 | This is for DWP version 2 files. */ | |
10220 | ||
10221 | static struct dwo_unit * | |
10222 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10223 | uint32_t unit_index, | |
10224 | const char *comp_dir, | |
10225 | ULONGEST signature, int is_debug_types) | |
10226 | { | |
10227 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10228 | const struct dwp_hash_table *dwp_htab = | |
10229 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10230 | bfd *dbfd = dwp_file->dbfd; | |
10231 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10232 | struct dwo_file *dwo_file; | |
10233 | struct dwo_unit *dwo_unit; | |
10234 | struct virtual_v2_dwo_sections sections; | |
10235 | void **dwo_file_slot; | |
10236 | char *virtual_dwo_name; | |
73869dc2 DE |
10237 | struct cleanup *cleanups; |
10238 | int i; | |
10239 | ||
10240 | gdb_assert (dwp_file->version == 2); | |
10241 | ||
b4f54984 | 10242 | if (dwarf_read_debug) |
73869dc2 DE |
10243 | { |
10244 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10245 | kind, | |
10246 | pulongest (unit_index), hex_string (signature), | |
10247 | dwp_file->name); | |
10248 | } | |
10249 | ||
10250 | /* Fetch the section offsets of this DWO unit. */ | |
10251 | ||
10252 | memset (§ions, 0, sizeof (sections)); | |
10253 | cleanups = make_cleanup (null_cleanup, 0); | |
10254 | ||
10255 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10256 | { | |
10257 | uint32_t offset = read_4_bytes (dbfd, | |
10258 | dwp_htab->section_pool.v2.offsets | |
10259 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10260 | + i) | |
10261 | * sizeof (uint32_t))); | |
10262 | uint32_t size = read_4_bytes (dbfd, | |
10263 | dwp_htab->section_pool.v2.sizes | |
10264 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10265 | + i) | |
10266 | * sizeof (uint32_t))); | |
10267 | ||
10268 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10269 | { | |
10270 | case DW_SECT_INFO: | |
10271 | case DW_SECT_TYPES: | |
10272 | sections.info_or_types_offset = offset; | |
10273 | sections.info_or_types_size = size; | |
10274 | break; | |
10275 | case DW_SECT_ABBREV: | |
10276 | sections.abbrev_offset = offset; | |
10277 | sections.abbrev_size = size; | |
10278 | break; | |
10279 | case DW_SECT_LINE: | |
10280 | sections.line_offset = offset; | |
10281 | sections.line_size = size; | |
10282 | break; | |
10283 | case DW_SECT_LOC: | |
10284 | sections.loc_offset = offset; | |
10285 | sections.loc_size = size; | |
10286 | break; | |
10287 | case DW_SECT_STR_OFFSETS: | |
10288 | sections.str_offsets_offset = offset; | |
10289 | sections.str_offsets_size = size; | |
10290 | break; | |
10291 | case DW_SECT_MACINFO: | |
10292 | sections.macinfo_offset = offset; | |
10293 | sections.macinfo_size = size; | |
10294 | break; | |
10295 | case DW_SECT_MACRO: | |
10296 | sections.macro_offset = offset; | |
10297 | sections.macro_size = size; | |
10298 | break; | |
10299 | } | |
10300 | } | |
10301 | ||
10302 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10303 | have dwo_unit "live" in that. At least for now. | |
10304 | ||
10305 | The DWP file can be made up of a random collection of CUs and TUs. | |
10306 | However, for each CU + set of TUs that came from the same original DWO | |
10307 | file, we can combine them back into a virtual DWO file to save space | |
10308 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10309 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10310 | ||
10311 | virtual_dwo_name = | |
10312 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10313 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10314 | (long) (sections.line_size ? sections.line_offset : 0), | |
10315 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10316 | (long) (sections.str_offsets_size | |
10317 | ? sections.str_offsets_offset : 0)); | |
10318 | make_cleanup (xfree, virtual_dwo_name); | |
10319 | /* Can we use an existing virtual DWO file? */ | |
10320 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10321 | /* Create one if necessary. */ | |
10322 | if (*dwo_file_slot == NULL) | |
10323 | { | |
b4f54984 | 10324 | if (dwarf_read_debug) |
73869dc2 DE |
10325 | { |
10326 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10327 | virtual_dwo_name); | |
10328 | } | |
10329 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10330 | dwo_file->dwo_name |
10331 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10332 | virtual_dwo_name, | |
10333 | strlen (virtual_dwo_name)); | |
73869dc2 DE |
10334 | dwo_file->comp_dir = comp_dir; |
10335 | dwo_file->sections.abbrev = | |
10336 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10337 | sections.abbrev_offset, sections.abbrev_size); | |
10338 | dwo_file->sections.line = | |
10339 | create_dwp_v2_section (&dwp_file->sections.line, | |
10340 | sections.line_offset, sections.line_size); | |
10341 | dwo_file->sections.loc = | |
10342 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10343 | sections.loc_offset, sections.loc_size); | |
10344 | dwo_file->sections.macinfo = | |
10345 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10346 | sections.macinfo_offset, sections.macinfo_size); | |
10347 | dwo_file->sections.macro = | |
10348 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10349 | sections.macro_offset, sections.macro_size); | |
10350 | dwo_file->sections.str_offsets = | |
10351 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10352 | sections.str_offsets_offset, | |
10353 | sections.str_offsets_size); | |
10354 | /* The "str" section is global to the entire DWP file. */ | |
10355 | dwo_file->sections.str = dwp_file->sections.str; | |
10356 | /* The info or types section is assigned below to dwo_unit, | |
10357 | there's no need to record it in dwo_file. | |
10358 | Also, we can't simply record type sections in dwo_file because | |
10359 | we record a pointer into the vector in dwo_unit. As we collect more | |
10360 | types we'll grow the vector and eventually have to reallocate space | |
10361 | for it, invalidating all copies of pointers into the previous | |
10362 | contents. */ | |
10363 | *dwo_file_slot = dwo_file; | |
10364 | } | |
10365 | else | |
10366 | { | |
b4f54984 | 10367 | if (dwarf_read_debug) |
73869dc2 DE |
10368 | { |
10369 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10370 | virtual_dwo_name); | |
10371 | } | |
9a3c8263 | 10372 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 DE |
10373 | } |
10374 | do_cleanups (cleanups); | |
10375 | ||
10376 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10377 | dwo_unit->dwo_file = dwo_file; | |
10378 | dwo_unit->signature = signature; | |
8d749320 SM |
10379 | dwo_unit->section = |
10380 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
10381 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
10382 | ? &dwp_file->sections.types | |
10383 | : &dwp_file->sections.info, | |
10384 | sections.info_or_types_offset, | |
10385 | sections.info_or_types_size); | |
10386 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10387 | ||
10388 | return dwo_unit; | |
10389 | } | |
10390 | ||
57d63ce2 DE |
10391 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10392 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10393 | |
10394 | static struct dwo_unit * | |
57d63ce2 DE |
10395 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10396 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10397 | { |
57d63ce2 DE |
10398 | const struct dwp_hash_table *dwp_htab = |
10399 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10400 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10401 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10402 | uint32_t hash = signature & mask; |
10403 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10404 | unsigned int i; | |
10405 | void **slot; | |
870f88f7 | 10406 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
10407 | |
10408 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10409 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10410 | slot = htab_find_slot (is_debug_types |
10411 | ? dwp_file->loaded_tus | |
10412 | : dwp_file->loaded_cus, | |
10413 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10414 | |
10415 | if (*slot != NULL) | |
9a3c8263 | 10416 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10417 | |
10418 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10419 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10420 | { |
10421 | ULONGEST signature_in_table; | |
10422 | ||
10423 | signature_in_table = | |
57d63ce2 | 10424 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10425 | if (signature_in_table == signature) |
10426 | { | |
57d63ce2 DE |
10427 | uint32_t unit_index = |
10428 | read_4_bytes (dbfd, | |
10429 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10430 | |
73869dc2 DE |
10431 | if (dwp_file->version == 1) |
10432 | { | |
10433 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10434 | comp_dir, signature, | |
10435 | is_debug_types); | |
10436 | } | |
10437 | else | |
10438 | { | |
10439 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10440 | comp_dir, signature, | |
10441 | is_debug_types); | |
10442 | } | |
9a3c8263 | 10443 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10444 | } |
10445 | if (signature_in_table == 0) | |
10446 | return NULL; | |
10447 | hash = (hash + hash2) & mask; | |
10448 | } | |
10449 | ||
10450 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10451 | " [in module %s]"), | |
10452 | dwp_file->name); | |
10453 | } | |
10454 | ||
ab5088bf | 10455 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10456 | Open the file specified by FILE_NAME and hand it off to BFD for |
10457 | preliminary analysis. Return a newly initialized bfd *, which | |
10458 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10459 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10460 | SEARCH_CWD is true if the current directory is to be searched. |
10461 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10462 | If successful, the file is added to the bfd include table of the |
10463 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10464 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10465 | NOTE: This function is derived from symfile_bfd_open. */ |
10466 | ||
10467 | static bfd * | |
6ac97d4c | 10468 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
10469 | { |
10470 | bfd *sym_bfd; | |
80626a55 | 10471 | int desc, flags; |
3019eac3 | 10472 | char *absolute_name; |
9c02c129 DE |
10473 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10474 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10475 | to debug_file_directory. */ | |
10476 | char *search_path; | |
10477 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10478 | ||
6ac97d4c DE |
10479 | if (search_cwd) |
10480 | { | |
10481 | if (*debug_file_directory != '\0') | |
10482 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 10483 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
10484 | else |
10485 | search_path = xstrdup ("."); | |
10486 | } | |
9c02c129 | 10487 | else |
6ac97d4c | 10488 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10489 | |
492c0ab7 | 10490 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10491 | if (is_dwp) |
10492 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10493 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10494 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10495 | xfree (search_path); |
3019eac3 DE |
10496 | if (desc < 0) |
10497 | return NULL; | |
10498 | ||
bb397797 | 10499 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 10500 | xfree (absolute_name); |
9c02c129 DE |
10501 | if (sym_bfd == NULL) |
10502 | return NULL; | |
3019eac3 DE |
10503 | bfd_set_cacheable (sym_bfd, 1); |
10504 | ||
10505 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
10506 | { | |
cbb099e8 | 10507 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
10508 | return NULL; |
10509 | } | |
10510 | ||
13aaf454 DE |
10511 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10512 | This is important because things like demangled_names_hash lives in the | |
10513 | objfile's per_bfd space and may have references to things like symbol | |
10514 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
10515 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd); | |
10516 | ||
3019eac3 DE |
10517 | return sym_bfd; |
10518 | } | |
10519 | ||
ab5088bf | 10520 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10521 | COMP_DIR is the DW_AT_comp_dir attribute. |
10522 | The result is the bfd handle of the file. | |
10523 | If there is a problem finding or opening the file, return NULL. | |
10524 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10525 | same as symfile_bfd_open. */ | |
10526 | ||
10527 | static bfd * | |
ab5088bf | 10528 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
10529 | { |
10530 | bfd *abfd; | |
3019eac3 | 10531 | |
80626a55 | 10532 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10533 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10534 | |
10535 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10536 | ||
10537 | if (comp_dir != NULL) | |
10538 | { | |
b36cec19 PA |
10539 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
10540 | file_name, (char *) NULL); | |
3019eac3 DE |
10541 | |
10542 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10543 | search path, which seems useful. */ | |
6ac97d4c | 10544 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10545 | xfree (path_to_try); |
10546 | if (abfd != NULL) | |
10547 | return abfd; | |
10548 | } | |
10549 | ||
10550 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10551 | is a list of paths. */ | |
10552 | ||
10553 | if (*debug_file_directory == '\0') | |
10554 | return NULL; | |
10555 | ||
6ac97d4c | 10556 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10557 | } |
10558 | ||
80626a55 DE |
10559 | /* This function is mapped across the sections and remembers the offset and |
10560 | size of each of the DWO debugging sections we are interested in. */ | |
10561 | ||
10562 | static void | |
10563 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10564 | { | |
9a3c8263 | 10565 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
10566 | const struct dwop_section_names *names = &dwop_section_names; |
10567 | ||
10568 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10569 | { | |
049412e3 | 10570 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
10571 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10572 | } | |
10573 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10574 | { | |
049412e3 | 10575 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
10576 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10577 | } | |
10578 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10579 | { | |
049412e3 | 10580 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
10581 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10582 | } | |
10583 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10584 | { | |
049412e3 | 10585 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
10586 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10587 | } | |
10588 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10589 | { | |
049412e3 | 10590 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
10591 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10592 | } | |
10593 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10594 | { | |
049412e3 | 10595 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
10596 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10597 | } | |
10598 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10599 | { | |
049412e3 | 10600 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
10601 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10602 | } | |
10603 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10604 | { | |
049412e3 | 10605 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
10606 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10607 | } | |
10608 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10609 | { | |
10610 | struct dwarf2_section_info type_section; | |
10611 | ||
10612 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 10613 | type_section.s.section = sectp; |
80626a55 DE |
10614 | type_section.size = bfd_get_section_size (sectp); |
10615 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10616 | &type_section); | |
10617 | } | |
10618 | } | |
10619 | ||
ab5088bf | 10620 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10621 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10622 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10623 | |
10624 | static struct dwo_file * | |
0ac5b59e DE |
10625 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10626 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10627 | { |
10628 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10629 | struct dwo_file *dwo_file; |
10630 | bfd *dbfd; | |
3019eac3 DE |
10631 | struct cleanup *cleanups; |
10632 | ||
ab5088bf | 10633 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
10634 | if (dbfd == NULL) |
10635 | { | |
b4f54984 | 10636 | if (dwarf_read_debug) |
80626a55 DE |
10637 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
10638 | return NULL; | |
10639 | } | |
10640 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10641 | dwo_file->dwo_name = dwo_name; |
10642 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 10643 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
10644 | |
10645 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10646 | ||
80626a55 | 10647 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 10648 | |
19c3d4c9 | 10649 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
10650 | |
10651 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
10652 | dwo_file->sections.types); | |
10653 | ||
10654 | discard_cleanups (cleanups); | |
10655 | ||
b4f54984 | 10656 | if (dwarf_read_debug) |
80626a55 DE |
10657 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
10658 | ||
3019eac3 DE |
10659 | return dwo_file; |
10660 | } | |
10661 | ||
80626a55 | 10662 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10663 | size of each of the DWP debugging sections common to version 1 and 2 that |
10664 | we are interested in. */ | |
3019eac3 | 10665 | |
80626a55 | 10666 | static void |
73869dc2 DE |
10667 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10668 | void *dwp_file_ptr) | |
3019eac3 | 10669 | { |
9a3c8263 | 10670 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
10671 | const struct dwop_section_names *names = &dwop_section_names; |
10672 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10673 | |
80626a55 | 10674 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10675 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10676 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10677 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10678 | |
80626a55 DE |
10679 | /* Look for specific sections that we need. */ |
10680 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10681 | { | |
049412e3 | 10682 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
10683 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10684 | } | |
10685 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10686 | { | |
049412e3 | 10687 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
10688 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10689 | } | |
10690 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10691 | { | |
049412e3 | 10692 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
10693 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10694 | } | |
10695 | } | |
3019eac3 | 10696 | |
73869dc2 DE |
10697 | /* This function is mapped across the sections and remembers the offset and |
10698 | size of each of the DWP version 2 debugging sections that we are interested | |
10699 | in. This is split into a separate function because we don't know if we | |
10700 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10701 | ||
10702 | static void | |
10703 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10704 | { | |
9a3c8263 | 10705 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
10706 | const struct dwop_section_names *names = &dwop_section_names; |
10707 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10708 | ||
10709 | /* Record the ELF section number for later lookup: this is what the | |
10710 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10711 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10712 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10713 | ||
10714 | /* Look for specific sections that we need. */ | |
10715 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10716 | { | |
049412e3 | 10717 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
10718 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
10719 | } | |
10720 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10721 | { | |
049412e3 | 10722 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
10723 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
10724 | } | |
10725 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10726 | { | |
049412e3 | 10727 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
10728 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
10729 | } | |
10730 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10731 | { | |
049412e3 | 10732 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
10733 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
10734 | } | |
10735 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10736 | { | |
049412e3 | 10737 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
10738 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
10739 | } | |
10740 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10741 | { | |
049412e3 | 10742 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
10743 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
10744 | } | |
10745 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10746 | { | |
049412e3 | 10747 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
10748 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
10749 | } | |
10750 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10751 | { | |
049412e3 | 10752 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
10753 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
10754 | } | |
10755 | } | |
10756 | ||
80626a55 | 10757 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10758 | |
80626a55 DE |
10759 | static hashval_t |
10760 | hash_dwp_loaded_cutus (const void *item) | |
10761 | { | |
9a3c8263 | 10762 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 10763 | |
80626a55 DE |
10764 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
10765 | return dwo_unit->signature; | |
3019eac3 DE |
10766 | } |
10767 | ||
80626a55 | 10768 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10769 | |
80626a55 DE |
10770 | static int |
10771 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 10772 | { |
9a3c8263 SM |
10773 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
10774 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 10775 | |
80626a55 DE |
10776 | return dua->signature == dub->signature; |
10777 | } | |
3019eac3 | 10778 | |
80626a55 | 10779 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10780 | |
80626a55 DE |
10781 | static htab_t |
10782 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
10783 | { | |
10784 | return htab_create_alloc_ex (3, | |
10785 | hash_dwp_loaded_cutus, | |
10786 | eq_dwp_loaded_cutus, | |
10787 | NULL, | |
10788 | &objfile->objfile_obstack, | |
10789 | hashtab_obstack_allocate, | |
10790 | dummy_obstack_deallocate); | |
10791 | } | |
3019eac3 | 10792 | |
ab5088bf DE |
10793 | /* Try to open DWP file FILE_NAME. |
10794 | The result is the bfd handle of the file. | |
10795 | If there is a problem finding or opening the file, return NULL. | |
10796 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10797 | same as symfile_bfd_open. */ | |
10798 | ||
10799 | static bfd * | |
10800 | open_dwp_file (const char *file_name) | |
10801 | { | |
6ac97d4c DE |
10802 | bfd *abfd; |
10803 | ||
10804 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
10805 | if (abfd != NULL) | |
10806 | return abfd; | |
10807 | ||
10808 | /* Work around upstream bug 15652. | |
10809 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
10810 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
10811 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
10812 | of the executable's path may have discarded the needed info. | |
10813 | [IWBN if the dwp file name was recorded in the executable, akin to | |
10814 | .gnu_debuglink, but that doesn't exist yet.] | |
10815 | Strip the directory from FILE_NAME and search again. */ | |
10816 | if (*debug_file_directory != '\0') | |
10817 | { | |
10818 | /* Don't implicitly search the current directory here. | |
10819 | If the user wants to search "." to handle this case, | |
10820 | it must be added to debug-file-directory. */ | |
10821 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
10822 | 0 /*search_cwd*/); | |
10823 | } | |
10824 | ||
10825 | return NULL; | |
ab5088bf DE |
10826 | } |
10827 | ||
80626a55 DE |
10828 | /* Initialize the use of the DWP file for the current objfile. |
10829 | By convention the name of the DWP file is ${objfile}.dwp. | |
10830 | The result is NULL if it can't be found. */ | |
a766d390 | 10831 | |
80626a55 | 10832 | static struct dwp_file * |
ab5088bf | 10833 | open_and_init_dwp_file (void) |
80626a55 DE |
10834 | { |
10835 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10836 | struct dwp_file *dwp_file; | |
10837 | char *dwp_name; | |
10838 | bfd *dbfd; | |
6c447423 | 10839 | struct cleanup *cleanups = make_cleanup (null_cleanup, 0); |
80626a55 | 10840 | |
82bf32bc JK |
10841 | /* Try to find first .dwp for the binary file before any symbolic links |
10842 | resolving. */ | |
6c447423 DE |
10843 | |
10844 | /* If the objfile is a debug file, find the name of the real binary | |
10845 | file and get the name of dwp file from there. */ | |
10846 | if (objfile->separate_debug_objfile_backlink != NULL) | |
10847 | { | |
10848 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
10849 | const char *backlink_basename = lbasename (backlink->original_name); | |
10850 | char *debug_dirname = ldirname (objfile->original_name); | |
10851 | ||
10852 | make_cleanup (xfree, debug_dirname); | |
10853 | dwp_name = xstrprintf ("%s%s%s.dwp", debug_dirname, | |
10854 | SLASH_STRING, backlink_basename); | |
10855 | } | |
10856 | else | |
10857 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
10858 | make_cleanup (xfree, dwp_name); | |
80626a55 | 10859 | |
ab5088bf | 10860 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
10861 | if (dbfd == NULL |
10862 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
10863 | { | |
10864 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
10865 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
10866 | make_cleanup (xfree, dwp_name); | |
10867 | dbfd = open_dwp_file (dwp_name); | |
10868 | } | |
10869 | ||
80626a55 DE |
10870 | if (dbfd == NULL) |
10871 | { | |
b4f54984 | 10872 | if (dwarf_read_debug) |
80626a55 DE |
10873 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); |
10874 | do_cleanups (cleanups); | |
10875 | return NULL; | |
3019eac3 | 10876 | } |
80626a55 | 10877 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 10878 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
10879 | dwp_file->dbfd = dbfd; |
10880 | do_cleanups (cleanups); | |
c906108c | 10881 | |
80626a55 DE |
10882 | /* +1: section 0 is unused */ |
10883 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
10884 | dwp_file->elf_sections = | |
10885 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
10886 | dwp_file->num_sections, asection *); | |
10887 | ||
73869dc2 | 10888 | bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file); |
80626a55 DE |
10889 | |
10890 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
10891 | ||
10892 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
10893 | ||
73869dc2 DE |
10894 | /* The DWP file version is stored in the hash table. Oh well. */ |
10895 | if (dwp_file->cus->version != dwp_file->tus->version) | |
10896 | { | |
10897 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 10898 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 10899 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
10900 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
10901 | " TU version %s [in DWP file %s]"), | |
10902 | pulongest (dwp_file->cus->version), | |
10903 | pulongest (dwp_file->tus->version), dwp_name); | |
73869dc2 DE |
10904 | } |
10905 | dwp_file->version = dwp_file->cus->version; | |
10906 | ||
10907 | if (dwp_file->version == 2) | |
10908 | bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file); | |
10909 | ||
19ac8c2e DE |
10910 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
10911 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 10912 | |
b4f54984 | 10913 | if (dwarf_read_debug) |
80626a55 DE |
10914 | { |
10915 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
10916 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
10917 | " %s CUs, %s TUs\n", |
10918 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
10919 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
10920 | } |
10921 | ||
10922 | return dwp_file; | |
3019eac3 | 10923 | } |
c906108c | 10924 | |
ab5088bf DE |
10925 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
10926 | ||
10927 | static struct dwp_file * | |
10928 | get_dwp_file (void) | |
10929 | { | |
10930 | if (! dwarf2_per_objfile->dwp_checked) | |
10931 | { | |
10932 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
10933 | dwarf2_per_objfile->dwp_checked = 1; | |
10934 | } | |
10935 | return dwarf2_per_objfile->dwp_file; | |
10936 | } | |
10937 | ||
80626a55 DE |
10938 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
10939 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
10940 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 10941 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
10942 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
10943 | ||
10944 | This is called, for example, when wanting to read a variable with a | |
10945 | complex location. Therefore we don't want to do file i/o for every call. | |
10946 | Therefore we don't want to look for a DWO file on every call. | |
10947 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
10948 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
10949 | for a DWO file. | |
10950 | ||
1c658ad5 | 10951 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 10952 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 10953 | |
3019eac3 | 10954 | static struct dwo_unit * |
80626a55 DE |
10955 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
10956 | const char *dwo_name, const char *comp_dir, | |
10957 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
10958 | { |
10959 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10960 | const char *kind = is_debug_types ? "TU" : "CU"; |
10961 | void **dwo_file_slot; | |
3019eac3 | 10962 | struct dwo_file *dwo_file; |
80626a55 | 10963 | struct dwp_file *dwp_file; |
cb1df416 | 10964 | |
6a506a2d DE |
10965 | /* First see if there's a DWP file. |
10966 | If we have a DWP file but didn't find the DWO inside it, don't | |
10967 | look for the original DWO file. It makes gdb behave differently | |
10968 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 10969 | |
ab5088bf | 10970 | dwp_file = get_dwp_file (); |
80626a55 | 10971 | if (dwp_file != NULL) |
cf2c3c16 | 10972 | { |
80626a55 DE |
10973 | const struct dwp_hash_table *dwp_htab = |
10974 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10975 | ||
10976 | if (dwp_htab != NULL) | |
10977 | { | |
10978 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
10979 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
10980 | signature, is_debug_types); | |
80626a55 DE |
10981 | |
10982 | if (dwo_cutu != NULL) | |
10983 | { | |
b4f54984 | 10984 | if (dwarf_read_debug) |
80626a55 DE |
10985 | { |
10986 | fprintf_unfiltered (gdb_stdlog, | |
10987 | "Virtual DWO %s %s found: @%s\n", | |
10988 | kind, hex_string (signature), | |
10989 | host_address_to_string (dwo_cutu)); | |
10990 | } | |
10991 | return dwo_cutu; | |
10992 | } | |
10993 | } | |
10994 | } | |
6a506a2d | 10995 | else |
80626a55 | 10996 | { |
6a506a2d | 10997 | /* No DWP file, look for the DWO file. */ |
80626a55 | 10998 | |
6a506a2d DE |
10999 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11000 | if (*dwo_file_slot == NULL) | |
80626a55 | 11001 | { |
6a506a2d DE |
11002 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11003 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11004 | } |
6a506a2d | 11005 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11006 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11007 | |
6a506a2d | 11008 | if (dwo_file != NULL) |
19c3d4c9 | 11009 | { |
6a506a2d DE |
11010 | struct dwo_unit *dwo_cutu = NULL; |
11011 | ||
11012 | if (is_debug_types && dwo_file->tus) | |
11013 | { | |
11014 | struct dwo_unit find_dwo_cutu; | |
11015 | ||
11016 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11017 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11018 | dwo_cutu |
11019 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d DE |
11020 | } |
11021 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 11022 | { |
6a506a2d DE |
11023 | if (signature == dwo_file->cu->signature) |
11024 | dwo_cutu = dwo_file->cu; | |
11025 | } | |
11026 | ||
11027 | if (dwo_cutu != NULL) | |
11028 | { | |
b4f54984 | 11029 | if (dwarf_read_debug) |
6a506a2d DE |
11030 | { |
11031 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11032 | kind, dwo_name, hex_string (signature), | |
11033 | host_address_to_string (dwo_cutu)); | |
11034 | } | |
11035 | return dwo_cutu; | |
80626a55 DE |
11036 | } |
11037 | } | |
2e276125 | 11038 | } |
9cdd5dbd | 11039 | |
80626a55 DE |
11040 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11041 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11042 | correctly to find the file. */ | |
11043 | ||
b4f54984 | 11044 | if (dwarf_read_debug) |
80626a55 DE |
11045 | { |
11046 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11047 | kind, dwo_name, hex_string (signature)); | |
11048 | } | |
3019eac3 | 11049 | |
6656a72d DE |
11050 | /* This is a warning and not a complaint because it can be caused by |
11051 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11052 | { |
11053 | /* Print the name of the DWP file if we looked there, helps the user | |
11054 | better diagnose the problem. */ | |
11055 | char *dwp_text = NULL; | |
11056 | struct cleanup *cleanups; | |
11057 | ||
11058 | if (dwp_file != NULL) | |
11059 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
11060 | cleanups = make_cleanup (xfree, dwp_text); | |
11061 | ||
11062 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11063 | " [in module %s]"), | |
11064 | kind, dwo_name, hex_string (signature), | |
11065 | dwp_text != NULL ? dwp_text : "", | |
11066 | this_unit->is_debug_types ? "TU" : "CU", | |
11067 | this_unit->offset.sect_off, objfile_name (objfile)); | |
11068 | ||
11069 | do_cleanups (cleanups); | |
11070 | } | |
3019eac3 | 11071 | return NULL; |
5fb290d7 DJ |
11072 | } |
11073 | ||
80626a55 DE |
11074 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11075 | See lookup_dwo_cutu_unit for details. */ | |
11076 | ||
11077 | static struct dwo_unit * | |
11078 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11079 | const char *dwo_name, const char *comp_dir, | |
11080 | ULONGEST signature) | |
11081 | { | |
11082 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11083 | } | |
11084 | ||
11085 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11086 | See lookup_dwo_cutu_unit for details. */ | |
11087 | ||
11088 | static struct dwo_unit * | |
11089 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11090 | const char *dwo_name, const char *comp_dir) | |
11091 | { | |
11092 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11093 | } | |
11094 | ||
89e63ee4 DE |
11095 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11096 | ||
11097 | static int | |
11098 | queue_and_load_dwo_tu (void **slot, void *info) | |
11099 | { | |
11100 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11101 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11102 | ULONGEST signature = dwo_unit->signature; | |
11103 | struct signatured_type *sig_type = | |
11104 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11105 | ||
11106 | if (sig_type != NULL) | |
11107 | { | |
11108 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11109 | ||
11110 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11111 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11112 | while processing PER_CU. */ | |
11113 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11114 | load_full_type_unit (sig_cu); | |
11115 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11116 | } | |
11117 | ||
11118 | return 1; | |
11119 | } | |
11120 | ||
11121 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11122 | The DWO may have the only definition of the type, though it may not be | |
11123 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11124 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11125 | ||
11126 | static void | |
11127 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11128 | { | |
11129 | struct dwo_unit *dwo_unit; | |
11130 | struct dwo_file *dwo_file; | |
11131 | ||
11132 | gdb_assert (!per_cu->is_debug_types); | |
11133 | gdb_assert (get_dwp_file () == NULL); | |
11134 | gdb_assert (per_cu->cu != NULL); | |
11135 | ||
11136 | dwo_unit = per_cu->cu->dwo_unit; | |
11137 | gdb_assert (dwo_unit != NULL); | |
11138 | ||
11139 | dwo_file = dwo_unit->dwo_file; | |
11140 | if (dwo_file->tus != NULL) | |
11141 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
11142 | } | |
11143 | ||
3019eac3 DE |
11144 | /* Free all resources associated with DWO_FILE. |
11145 | Close the DWO file and munmap the sections. | |
11146 | All memory should be on the objfile obstack. */ | |
348e048f DE |
11147 | |
11148 | static void | |
3019eac3 | 11149 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 11150 | { |
348e048f | 11151 | |
5c6fa7ab | 11152 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 11153 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 11154 | |
3019eac3 DE |
11155 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
11156 | } | |
348e048f | 11157 | |
3019eac3 | 11158 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 11159 | |
3019eac3 DE |
11160 | static void |
11161 | free_dwo_file_cleanup (void *arg) | |
11162 | { | |
11163 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
11164 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 11165 | |
3019eac3 DE |
11166 | free_dwo_file (dwo_file, objfile); |
11167 | } | |
348e048f | 11168 | |
3019eac3 | 11169 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 11170 | |
3019eac3 DE |
11171 | static int |
11172 | free_dwo_file_from_slot (void **slot, void *info) | |
11173 | { | |
11174 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
11175 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 11176 | |
3019eac3 | 11177 | free_dwo_file (dwo_file, objfile); |
348e048f | 11178 | |
3019eac3 DE |
11179 | return 1; |
11180 | } | |
348e048f | 11181 | |
3019eac3 | 11182 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 11183 | |
3019eac3 DE |
11184 | static void |
11185 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
11186 | { | |
11187 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 11188 | } |
3019eac3 DE |
11189 | \f |
11190 | /* Read in various DIEs. */ | |
348e048f | 11191 | |
d389af10 JK |
11192 | /* qsort helper for inherit_abstract_dies. */ |
11193 | ||
11194 | static int | |
11195 | unsigned_int_compar (const void *ap, const void *bp) | |
11196 | { | |
11197 | unsigned int a = *(unsigned int *) ap; | |
11198 | unsigned int b = *(unsigned int *) bp; | |
11199 | ||
11200 | return (a > b) - (b > a); | |
11201 | } | |
11202 | ||
11203 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
11204 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11205 | already referenced by DW_AT_abstract_origin from the children of the | |
11206 | current DIE. */ | |
d389af10 JK |
11207 | |
11208 | static void | |
11209 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11210 | { | |
11211 | struct die_info *child_die; | |
11212 | unsigned die_children_count; | |
11213 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
11214 | sect_offset *offsets; |
11215 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
11216 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11217 | struct die_info *origin_die; | |
11218 | /* Iterator of the ORIGIN_DIE children. */ | |
11219 | struct die_info *origin_child_die; | |
11220 | struct cleanup *cleanups; | |
11221 | struct attribute *attr; | |
cd02d79d PA |
11222 | struct dwarf2_cu *origin_cu; |
11223 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11224 | |
11225 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11226 | if (!attr) | |
11227 | return; | |
11228 | ||
cd02d79d PA |
11229 | /* Note that following die references may follow to a die in a |
11230 | different cu. */ | |
11231 | ||
11232 | origin_cu = cu; | |
11233 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11234 | ||
11235 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11236 | symbols in. */ | |
11237 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11238 | origin_cu->list_in_scope = cu->list_in_scope; | |
11239 | ||
edb3359d DJ |
11240 | if (die->tag != origin_die->tag |
11241 | && !(die->tag == DW_TAG_inlined_subroutine | |
11242 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11243 | complaint (&symfile_complaints, |
11244 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 11245 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
11246 | |
11247 | child_die = die->child; | |
11248 | die_children_count = 0; | |
11249 | while (child_die && child_die->tag) | |
11250 | { | |
11251 | child_die = sibling_die (child_die); | |
11252 | die_children_count++; | |
11253 | } | |
8d749320 | 11254 | offsets = XNEWVEC (sect_offset, die_children_count); |
d389af10 JK |
11255 | cleanups = make_cleanup (xfree, offsets); |
11256 | ||
11257 | offsets_end = offsets; | |
3ea89b92 PMR |
11258 | for (child_die = die->child; |
11259 | child_die && child_die->tag; | |
11260 | child_die = sibling_die (child_die)) | |
11261 | { | |
11262 | struct die_info *child_origin_die; | |
11263 | struct dwarf2_cu *child_origin_cu; | |
11264 | ||
11265 | /* We are trying to process concrete instance entries: | |
11266 | DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but | |
11267 | it's not relevant to our analysis here. i.e. detecting DIEs that are | |
11268 | present in the abstract instance but not referenced in the concrete | |
11269 | one. */ | |
11270 | if (child_die->tag == DW_TAG_GNU_call_site) | |
11271 | continue; | |
11272 | ||
c38f313d DJ |
11273 | /* For each CHILD_DIE, find the corresponding child of |
11274 | ORIGIN_DIE. If there is more than one layer of | |
11275 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11276 | but GCC versions at least through 4.4 generate this (GCC PR | |
11277 | 40573). */ | |
3ea89b92 PMR |
11278 | child_origin_die = child_die; |
11279 | child_origin_cu = cu; | |
c38f313d DJ |
11280 | while (1) |
11281 | { | |
cd02d79d PA |
11282 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11283 | child_origin_cu); | |
c38f313d DJ |
11284 | if (attr == NULL) |
11285 | break; | |
cd02d79d PA |
11286 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11287 | &child_origin_cu); | |
c38f313d DJ |
11288 | } |
11289 | ||
d389af10 JK |
11290 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11291 | counterpart may exist. */ | |
c38f313d | 11292 | if (child_origin_die != child_die) |
d389af10 | 11293 | { |
edb3359d DJ |
11294 | if (child_die->tag != child_origin_die->tag |
11295 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11296 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11297 | complaint (&symfile_complaints, |
11298 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11299 | "different tags"), child_die->offset.sect_off, |
11300 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11301 | if (child_origin_die->parent != origin_die) |
11302 | complaint (&symfile_complaints, | |
11303 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11304 | "different parents"), child_die->offset.sect_off, |
11305 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11306 | else |
11307 | *offsets_end++ = child_origin_die->offset; | |
d389af10 | 11308 | } |
d389af10 JK |
11309 | } |
11310 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11311 | unsigned_int_compar); | |
11312 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 11313 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
11314 | complaint (&symfile_complaints, |
11315 | _("Multiple children of DIE 0x%x refer " | |
11316 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 11317 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
11318 | |
11319 | offsetp = offsets; | |
11320 | origin_child_die = origin_die->child; | |
11321 | while (origin_child_die && origin_child_die->tag) | |
11322 | { | |
11323 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
11324 | while (offsetp < offsets_end |
11325 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 11326 | offsetp++; |
b64f50a1 JK |
11327 | if (offsetp >= offsets_end |
11328 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 | 11329 | { |
adde2bff DE |
11330 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11331 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11332 | This can happen with mutually referenced abstract_origins. | |
11333 | PR 16581. */ | |
11334 | if (!origin_child_die->in_process) | |
11335 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11336 | } |
11337 | origin_child_die = sibling_die (origin_child_die); | |
11338 | } | |
cd02d79d | 11339 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11340 | |
11341 | do_cleanups (cleanups); | |
11342 | } | |
11343 | ||
c906108c | 11344 | static void |
e7c27a73 | 11345 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11346 | { |
e7c27a73 | 11347 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11348 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11349 | struct context_stack *newobj; |
c906108c SS |
11350 | CORE_ADDR lowpc; |
11351 | CORE_ADDR highpc; | |
11352 | struct die_info *child_die; | |
edb3359d | 11353 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11354 | const char *name; |
e142c38c | 11355 | CORE_ADDR baseaddr; |
801e3a5b | 11356 | struct block *block; |
edb3359d | 11357 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11358 | VEC (symbolp) *template_args = NULL; |
11359 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11360 | |
11361 | if (inlined_func) | |
11362 | { | |
11363 | /* If we do not have call site information, we can't show the | |
11364 | caller of this inlined function. That's too confusing, so | |
11365 | only use the scope for local variables. */ | |
11366 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11367 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11368 | if (call_line == NULL || call_file == NULL) | |
11369 | { | |
11370 | read_lexical_block_scope (die, cu); | |
11371 | return; | |
11372 | } | |
11373 | } | |
c906108c | 11374 | |
e142c38c DJ |
11375 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11376 | ||
94af9270 | 11377 | name = dwarf2_name (die, cu); |
c906108c | 11378 | |
e8d05480 JB |
11379 | /* Ignore functions with missing or empty names. These are actually |
11380 | illegal according to the DWARF standard. */ | |
11381 | if (name == NULL) | |
11382 | { | |
11383 | complaint (&symfile_complaints, | |
b64f50a1 JK |
11384 | _("missing name for subprogram DIE at %d"), |
11385 | die->offset.sect_off); | |
e8d05480 JB |
11386 | return; |
11387 | } | |
11388 | ||
11389 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 11390 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 11391 | <= PC_BOUNDS_INVALID) |
e8d05480 | 11392 | { |
ae4d0c03 PM |
11393 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11394 | if (!attr || !DW_UNSND (attr)) | |
11395 | complaint (&symfile_complaints, | |
3e43a32a MS |
11396 | _("cannot get low and high bounds " |
11397 | "for subprogram DIE at %d"), | |
b64f50a1 | 11398 | die->offset.sect_off); |
e8d05480 JB |
11399 | return; |
11400 | } | |
c906108c | 11401 | |
3e29f34a MR |
11402 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11403 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 11404 | |
34eaf542 TT |
11405 | /* If we have any template arguments, then we must allocate a |
11406 | different sort of symbol. */ | |
11407 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11408 | { | |
11409 | if (child_die->tag == DW_TAG_template_type_param | |
11410 | || child_die->tag == DW_TAG_template_value_param) | |
11411 | { | |
e623cf5d | 11412 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11413 | templ_func->base.is_cplus_template_function = 1; |
11414 | break; | |
11415 | } | |
11416 | } | |
11417 | ||
fe978cb0 PA |
11418 | newobj = push_context (0, lowpc); |
11419 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 11420 | (struct symbol *) templ_func); |
4c2df51b | 11421 | |
4cecd739 DJ |
11422 | /* If there is a location expression for DW_AT_frame_base, record |
11423 | it. */ | |
e142c38c | 11424 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11425 | if (attr) |
fe978cb0 | 11426 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 11427 | |
63e43d3a PMR |
11428 | /* If there is a location for the static link, record it. */ |
11429 | newobj->static_link = NULL; | |
11430 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
11431 | if (attr) | |
11432 | { | |
224c3ddb SM |
11433 | newobj->static_link |
11434 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
11435 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
11436 | } | |
11437 | ||
e142c38c | 11438 | cu->list_in_scope = &local_symbols; |
c906108c | 11439 | |
639d11d3 | 11440 | if (die->child != NULL) |
c906108c | 11441 | { |
639d11d3 | 11442 | child_die = die->child; |
c906108c SS |
11443 | while (child_die && child_die->tag) |
11444 | { | |
34eaf542 TT |
11445 | if (child_die->tag == DW_TAG_template_type_param |
11446 | || child_die->tag == DW_TAG_template_value_param) | |
11447 | { | |
11448 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11449 | ||
f1078f66 DJ |
11450 | if (arg != NULL) |
11451 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11452 | } |
11453 | else | |
11454 | process_die (child_die, cu); | |
c906108c SS |
11455 | child_die = sibling_die (child_die); |
11456 | } | |
11457 | } | |
11458 | ||
d389af10 JK |
11459 | inherit_abstract_dies (die, cu); |
11460 | ||
4a811a97 UW |
11461 | /* If we have a DW_AT_specification, we might need to import using |
11462 | directives from the context of the specification DIE. See the | |
11463 | comment in determine_prefix. */ | |
11464 | if (cu->language == language_cplus | |
11465 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11466 | { | |
11467 | struct dwarf2_cu *spec_cu = cu; | |
11468 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11469 | ||
11470 | while (spec_die) | |
11471 | { | |
11472 | child_die = spec_die->child; | |
11473 | while (child_die && child_die->tag) | |
11474 | { | |
11475 | if (child_die->tag == DW_TAG_imported_module) | |
11476 | process_die (child_die, spec_cu); | |
11477 | child_die = sibling_die (child_die); | |
11478 | } | |
11479 | ||
11480 | /* In some cases, GCC generates specification DIEs that | |
11481 | themselves contain DW_AT_specification attributes. */ | |
11482 | spec_die = die_specification (spec_die, &spec_cu); | |
11483 | } | |
11484 | } | |
11485 | ||
fe978cb0 | 11486 | newobj = pop_context (); |
c906108c | 11487 | /* Make a block for the local symbols within. */ |
fe978cb0 | 11488 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 11489 | newobj->static_link, lowpc, highpc); |
801e3a5b | 11490 | |
df8a16a1 | 11491 | /* For C++, set the block's scope. */ |
45280282 IB |
11492 | if ((cu->language == language_cplus |
11493 | || cu->language == language_fortran | |
c44af4eb TT |
11494 | || cu->language == language_d |
11495 | || cu->language == language_rust) | |
4d4ec4e5 | 11496 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11497 | block_set_scope (block, determine_prefix (die, cu), |
11498 | &objfile->objfile_obstack); | |
df8a16a1 | 11499 | |
801e3a5b JB |
11500 | /* If we have address ranges, record them. */ |
11501 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11502 | |
fe978cb0 | 11503 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 11504 | |
34eaf542 TT |
11505 | /* Attach template arguments to function. */ |
11506 | if (! VEC_empty (symbolp, template_args)) | |
11507 | { | |
11508 | gdb_assert (templ_func != NULL); | |
11509 | ||
11510 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11511 | templ_func->template_arguments | |
8d749320 SM |
11512 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
11513 | templ_func->n_template_arguments); | |
34eaf542 TT |
11514 | memcpy (templ_func->template_arguments, |
11515 | VEC_address (symbolp, template_args), | |
11516 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11517 | VEC_free (symbolp, template_args); | |
11518 | } | |
11519 | ||
208d8187 JB |
11520 | /* In C++, we can have functions nested inside functions (e.g., when |
11521 | a function declares a class that has methods). This means that | |
11522 | when we finish processing a function scope, we may need to go | |
11523 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 11524 | local_symbols = newobj->locals; |
22cee43f | 11525 | local_using_directives = newobj->local_using_directives; |
208d8187 | 11526 | |
921e78cf JB |
11527 | /* If we've finished processing a top-level function, subsequent |
11528 | symbols go in the file symbol list. */ | |
11529 | if (outermost_context_p ()) | |
e142c38c | 11530 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11531 | } |
11532 | ||
11533 | /* Process all the DIES contained within a lexical block scope. Start | |
11534 | a new scope, process the dies, and then close the scope. */ | |
11535 | ||
11536 | static void | |
e7c27a73 | 11537 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11538 | { |
e7c27a73 | 11539 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11540 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11541 | struct context_stack *newobj; |
c906108c SS |
11542 | CORE_ADDR lowpc, highpc; |
11543 | struct die_info *child_die; | |
e142c38c DJ |
11544 | CORE_ADDR baseaddr; |
11545 | ||
11546 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11547 | |
11548 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11549 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11550 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11551 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11552 | describe ranges. */ |
e385593e JK |
11553 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
11554 | { | |
11555 | case PC_BOUNDS_NOT_PRESENT: | |
11556 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
11557 | there was no wrapping by that DW_TAG_lexical_block. | |
11558 | GCC does no longer produces such DWARF since GCC r224161. */ | |
11559 | for (child_die = die->child; | |
11560 | child_die != NULL && child_die->tag; | |
11561 | child_die = sibling_die (child_die)) | |
11562 | process_die (child_die, cu); | |
11563 | return; | |
11564 | case PC_BOUNDS_INVALID: | |
11565 | return; | |
11566 | } | |
3e29f34a MR |
11567 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11568 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
11569 | |
11570 | push_context (0, lowpc); | |
639d11d3 | 11571 | if (die->child != NULL) |
c906108c | 11572 | { |
639d11d3 | 11573 | child_die = die->child; |
c906108c SS |
11574 | while (child_die && child_die->tag) |
11575 | { | |
e7c27a73 | 11576 | process_die (child_die, cu); |
c906108c SS |
11577 | child_die = sibling_die (child_die); |
11578 | } | |
11579 | } | |
3ea89b92 | 11580 | inherit_abstract_dies (die, cu); |
fe978cb0 | 11581 | newobj = pop_context (); |
c906108c | 11582 | |
22cee43f | 11583 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 11584 | { |
801e3a5b | 11585 | struct block *block |
63e43d3a | 11586 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 11587 | newobj->start_addr, highpc); |
801e3a5b JB |
11588 | |
11589 | /* Note that recording ranges after traversing children, as we | |
11590 | do here, means that recording a parent's ranges entails | |
11591 | walking across all its children's ranges as they appear in | |
11592 | the address map, which is quadratic behavior. | |
11593 | ||
11594 | It would be nicer to record the parent's ranges before | |
11595 | traversing its children, simply overriding whatever you find | |
11596 | there. But since we don't even decide whether to create a | |
11597 | block until after we've traversed its children, that's hard | |
11598 | to do. */ | |
11599 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 11600 | } |
fe978cb0 | 11601 | local_symbols = newobj->locals; |
22cee43f | 11602 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
11603 | } |
11604 | ||
96408a79 SA |
11605 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
11606 | ||
11607 | static void | |
11608 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11609 | { | |
11610 | struct objfile *objfile = cu->objfile; | |
11611 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11612 | CORE_ADDR pc, baseaddr; | |
11613 | struct attribute *attr; | |
11614 | struct call_site *call_site, call_site_local; | |
11615 | void **slot; | |
11616 | int nparams; | |
11617 | struct die_info *child_die; | |
11618 | ||
11619 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11620 | ||
11621 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11622 | if (!attr) | |
11623 | { | |
11624 | complaint (&symfile_complaints, | |
11625 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
11626 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11627 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11628 | return; |
11629 | } | |
31aa7e4e | 11630 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 11631 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
11632 | |
11633 | if (cu->call_site_htab == NULL) | |
11634 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11635 | NULL, &objfile->objfile_obstack, | |
11636 | hashtab_obstack_allocate, NULL); | |
11637 | call_site_local.pc = pc; | |
11638 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11639 | if (*slot != NULL) | |
11640 | { | |
11641 | complaint (&symfile_complaints, | |
11642 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
11643 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
11644 | paddress (gdbarch, pc), die->offset.sect_off, |
11645 | objfile_name (objfile)); | |
96408a79 SA |
11646 | return; |
11647 | } | |
11648 | ||
11649 | /* Count parameters at the caller. */ | |
11650 | ||
11651 | nparams = 0; | |
11652 | for (child_die = die->child; child_die && child_die->tag; | |
11653 | child_die = sibling_die (child_die)) | |
11654 | { | |
11655 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11656 | { | |
11657 | complaint (&symfile_complaints, | |
11658 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
11659 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
11660 | child_die->tag, child_die->offset.sect_off, |
11661 | objfile_name (objfile)); | |
96408a79 SA |
11662 | continue; |
11663 | } | |
11664 | ||
11665 | nparams++; | |
11666 | } | |
11667 | ||
224c3ddb SM |
11668 | call_site |
11669 | = ((struct call_site *) | |
11670 | obstack_alloc (&objfile->objfile_obstack, | |
11671 | sizeof (*call_site) | |
11672 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
11673 | *slot = call_site; |
11674 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11675 | call_site->pc = pc; | |
11676 | ||
11677 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
11678 | { | |
11679 | struct die_info *func_die; | |
11680 | ||
11681 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11682 | for (func_die = die->parent; | |
11683 | func_die && func_die->tag != DW_TAG_subprogram | |
11684 | && func_die->tag != DW_TAG_subroutine_type; | |
11685 | func_die = func_die->parent); | |
11686 | ||
11687 | /* DW_AT_GNU_all_call_sites is a superset | |
11688 | of DW_AT_GNU_all_tail_call_sites. */ | |
11689 | if (func_die | |
11690 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
11691 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
11692 | { | |
11693 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11694 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11695 | both the initial caller containing the real return address PC and | |
11696 | the final callee containing the current PC of a chain of tail | |
11697 | calls do not need to have the tail call list complete. But any | |
11698 | function candidate for a virtual tail call frame searched via | |
11699 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11700 | determined unambiguously. */ | |
11701 | } | |
11702 | else | |
11703 | { | |
11704 | struct type *func_type = NULL; | |
11705 | ||
11706 | if (func_die) | |
11707 | func_type = get_die_type (func_die, cu); | |
11708 | if (func_type != NULL) | |
11709 | { | |
11710 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11711 | ||
11712 | /* Enlist this call site to the function. */ | |
11713 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11714 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11715 | } | |
11716 | else | |
11717 | complaint (&symfile_complaints, | |
11718 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
11719 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11720 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11721 | } |
11722 | } | |
11723 | ||
11724 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11725 | if (attr == NULL) | |
11726 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11727 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
11728 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
11729 | /* Keep NULL DWARF_BLOCK. */; | |
11730 | else if (attr_form_is_block (attr)) | |
11731 | { | |
11732 | struct dwarf2_locexpr_baton *dlbaton; | |
11733 | ||
8d749320 | 11734 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
11735 | dlbaton->data = DW_BLOCK (attr)->data; |
11736 | dlbaton->size = DW_BLOCK (attr)->size; | |
11737 | dlbaton->per_cu = cu->per_cu; | |
11738 | ||
11739 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
11740 | } | |
7771576e | 11741 | else if (attr_form_is_ref (attr)) |
96408a79 | 11742 | { |
96408a79 SA |
11743 | struct dwarf2_cu *target_cu = cu; |
11744 | struct die_info *target_die; | |
11745 | ||
ac9ec31b | 11746 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
11747 | gdb_assert (target_cu->objfile == objfile); |
11748 | if (die_is_declaration (target_die, target_cu)) | |
11749 | { | |
7d45c7c3 | 11750 | const char *target_physname; |
9112db09 JK |
11751 | |
11752 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
7d45c7c3 KB |
11753 | target_physname = dwarf2_string_attr (target_die, |
11754 | DW_AT_linkage_name, | |
11755 | target_cu); | |
11756 | if (target_physname == NULL) | |
11757 | target_physname = dwarf2_string_attr (target_die, | |
11758 | DW_AT_MIPS_linkage_name, | |
11759 | target_cu); | |
11760 | if (target_physname == NULL) | |
9112db09 | 11761 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
11762 | if (target_physname == NULL) |
11763 | complaint (&symfile_complaints, | |
11764 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11765 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11766 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11767 | else |
7d455152 | 11768 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
11769 | } |
11770 | else | |
11771 | { | |
11772 | CORE_ADDR lowpc; | |
11773 | ||
11774 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 11775 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 11776 | <= PC_BOUNDS_INVALID) |
96408a79 SA |
11777 | complaint (&symfile_complaints, |
11778 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11779 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11780 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11781 | else |
3e29f34a MR |
11782 | { |
11783 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
11784 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
11785 | } | |
96408a79 SA |
11786 | } |
11787 | } | |
11788 | else | |
11789 | complaint (&symfile_complaints, | |
11790 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
11791 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 11792 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11793 | |
11794 | call_site->per_cu = cu->per_cu; | |
11795 | ||
11796 | for (child_die = die->child; | |
11797 | child_die && child_die->tag; | |
11798 | child_die = sibling_die (child_die)) | |
11799 | { | |
96408a79 | 11800 | struct call_site_parameter *parameter; |
1788b2d3 | 11801 | struct attribute *loc, *origin; |
96408a79 SA |
11802 | |
11803 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11804 | { | |
11805 | /* Already printed the complaint above. */ | |
11806 | continue; | |
11807 | } | |
11808 | ||
11809 | gdb_assert (call_site->parameter_count < nparams); | |
11810 | parameter = &call_site->parameter[call_site->parameter_count]; | |
11811 | ||
1788b2d3 JK |
11812 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
11813 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
11814 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 11815 | |
24c5c679 | 11816 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 11817 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 11818 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
11819 | { |
11820 | sect_offset offset; | |
11821 | ||
11822 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
11823 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
11824 | if (!offset_in_cu_p (&cu->header, offset)) |
11825 | { | |
11826 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
11827 | binding can be done only inside one CU. Such referenced DIE | |
11828 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
11829 | complaint (&symfile_complaints, | |
11830 | _("DW_AT_abstract_origin offset is not in CU for " | |
11831 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11832 | "[in module %s]"), | |
4262abfb | 11833 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
11834 | continue; |
11835 | } | |
1788b2d3 JK |
11836 | parameter->u.param_offset.cu_off = (offset.sect_off |
11837 | - cu->header.offset.sect_off); | |
11838 | } | |
11839 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
11840 | { |
11841 | complaint (&symfile_complaints, | |
11842 | _("No DW_FORM_block* DW_AT_location for " | |
11843 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11844 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11845 | continue; |
11846 | } | |
24c5c679 | 11847 | else |
96408a79 | 11848 | { |
24c5c679 JK |
11849 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
11850 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
11851 | if (parameter->u.dwarf_reg != -1) | |
11852 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
11853 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
11854 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
11855 | ¶meter->u.fb_offset)) | |
11856 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
11857 | else | |
11858 | { | |
11859 | complaint (&symfile_complaints, | |
11860 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
11861 | "for DW_FORM_block* DW_AT_location is supported for " | |
11862 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11863 | "[in module %s]"), | |
4262abfb | 11864 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
11865 | continue; |
11866 | } | |
96408a79 SA |
11867 | } |
11868 | ||
11869 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
11870 | if (!attr_form_is_block (attr)) | |
11871 | { | |
11872 | complaint (&symfile_complaints, | |
11873 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
11874 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11875 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11876 | continue; |
11877 | } | |
11878 | parameter->value = DW_BLOCK (attr)->data; | |
11879 | parameter->value_size = DW_BLOCK (attr)->size; | |
11880 | ||
11881 | /* Parameters are not pre-cleared by memset above. */ | |
11882 | parameter->data_value = NULL; | |
11883 | parameter->data_value_size = 0; | |
11884 | call_site->parameter_count++; | |
11885 | ||
11886 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
11887 | if (attr) | |
11888 | { | |
11889 | if (!attr_form_is_block (attr)) | |
11890 | complaint (&symfile_complaints, | |
11891 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
11892 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11893 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11894 | else |
11895 | { | |
11896 | parameter->data_value = DW_BLOCK (attr)->data; | |
11897 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
11898 | } | |
11899 | } | |
11900 | } | |
11901 | } | |
11902 | ||
43039443 | 11903 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
11904 | Return 1 if the attributes are present and valid, otherwise, return 0. |
11905 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
11906 | |
11907 | static int | |
11908 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
11909 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
11910 | struct partial_symtab *ranges_pst) | |
43039443 JK |
11911 | { |
11912 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 11913 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
11914 | struct comp_unit_head *cu_header = &cu->header; |
11915 | bfd *obfd = objfile->obfd; | |
11916 | unsigned int addr_size = cu_header->addr_size; | |
11917 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11918 | /* Base address selection entry. */ | |
11919 | CORE_ADDR base; | |
11920 | int found_base; | |
11921 | unsigned int dummy; | |
d521ce57 | 11922 | const gdb_byte *buffer; |
43039443 JK |
11923 | int low_set; |
11924 | CORE_ADDR low = 0; | |
11925 | CORE_ADDR high = 0; | |
ff013f42 | 11926 | CORE_ADDR baseaddr; |
43039443 | 11927 | |
d00adf39 DE |
11928 | found_base = cu->base_known; |
11929 | base = cu->base_address; | |
43039443 | 11930 | |
be391dca | 11931 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11932 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
11933 | { |
11934 | complaint (&symfile_complaints, | |
11935 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
11936 | offset); | |
11937 | return 0; | |
11938 | } | |
dce234bc | 11939 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 11940 | |
43039443 JK |
11941 | low_set = 0; |
11942 | ||
e7030f15 | 11943 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 11944 | |
43039443 JK |
11945 | while (1) |
11946 | { | |
11947 | CORE_ADDR range_beginning, range_end; | |
11948 | ||
11949 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
11950 | buffer += addr_size; | |
11951 | range_end = read_address (obfd, buffer, cu, &dummy); | |
11952 | buffer += addr_size; | |
11953 | offset += 2 * addr_size; | |
11954 | ||
11955 | /* An end of list marker is a pair of zero addresses. */ | |
11956 | if (range_beginning == 0 && range_end == 0) | |
11957 | /* Found the end of list entry. */ | |
11958 | break; | |
11959 | ||
11960 | /* Each base address selection entry is a pair of 2 values. | |
11961 | The first is the largest possible address, the second is | |
11962 | the base address. Check for a base address here. */ | |
11963 | if ((range_beginning & mask) == mask) | |
11964 | { | |
28d2bfb9 AB |
11965 | /* If we found the largest possible address, then we already |
11966 | have the base address in range_end. */ | |
11967 | base = range_end; | |
43039443 JK |
11968 | found_base = 1; |
11969 | continue; | |
11970 | } | |
11971 | ||
11972 | if (!found_base) | |
11973 | { | |
11974 | /* We have no valid base address for the ranges | |
11975 | data. */ | |
11976 | complaint (&symfile_complaints, | |
11977 | _("Invalid .debug_ranges data (no base address)")); | |
11978 | return 0; | |
11979 | } | |
11980 | ||
9277c30c UW |
11981 | if (range_beginning > range_end) |
11982 | { | |
11983 | /* Inverted range entries are invalid. */ | |
11984 | complaint (&symfile_complaints, | |
11985 | _("Invalid .debug_ranges data (inverted range)")); | |
11986 | return 0; | |
11987 | } | |
11988 | ||
11989 | /* Empty range entries have no effect. */ | |
11990 | if (range_beginning == range_end) | |
11991 | continue; | |
11992 | ||
43039443 JK |
11993 | range_beginning += base; |
11994 | range_end += base; | |
11995 | ||
01093045 DE |
11996 | /* A not-uncommon case of bad debug info. |
11997 | Don't pollute the addrmap with bad data. */ | |
11998 | if (range_beginning + baseaddr == 0 | |
11999 | && !dwarf2_per_objfile->has_section_at_zero) | |
12000 | { | |
12001 | complaint (&symfile_complaints, | |
12002 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12003 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12004 | continue; |
12005 | } | |
12006 | ||
9277c30c | 12007 | if (ranges_pst != NULL) |
3e29f34a MR |
12008 | { |
12009 | CORE_ADDR lowpc; | |
12010 | CORE_ADDR highpc; | |
12011 | ||
12012 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12013 | range_beginning + baseaddr); | |
12014 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12015 | range_end + baseaddr); | |
12016 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
12017 | ranges_pst); | |
12018 | } | |
ff013f42 | 12019 | |
43039443 JK |
12020 | /* FIXME: This is recording everything as a low-high |
12021 | segment of consecutive addresses. We should have a | |
12022 | data structure for discontiguous block ranges | |
12023 | instead. */ | |
12024 | if (! low_set) | |
12025 | { | |
12026 | low = range_beginning; | |
12027 | high = range_end; | |
12028 | low_set = 1; | |
12029 | } | |
12030 | else | |
12031 | { | |
12032 | if (range_beginning < low) | |
12033 | low = range_beginning; | |
12034 | if (range_end > high) | |
12035 | high = range_end; | |
12036 | } | |
12037 | } | |
12038 | ||
12039 | if (! low_set) | |
12040 | /* If the first entry is an end-of-list marker, the range | |
12041 | describes an empty scope, i.e. no instructions. */ | |
12042 | return 0; | |
12043 | ||
12044 | if (low_return) | |
12045 | *low_return = low; | |
12046 | if (high_return) | |
12047 | *high_return = high; | |
12048 | return 1; | |
12049 | } | |
12050 | ||
3a2b436a JK |
12051 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
12052 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 12053 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 12054 | |
3a2b436a | 12055 | static enum pc_bounds_kind |
af34e669 | 12056 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
12057 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
12058 | struct partial_symtab *pst) | |
c906108c SS |
12059 | { |
12060 | struct attribute *attr; | |
91da1414 | 12061 | struct attribute *attr_high; |
af34e669 DJ |
12062 | CORE_ADDR low = 0; |
12063 | CORE_ADDR high = 0; | |
e385593e | 12064 | enum pc_bounds_kind ret; |
c906108c | 12065 | |
91da1414 MW |
12066 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12067 | if (attr_high) | |
af34e669 | 12068 | { |
e142c38c | 12069 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 12070 | if (attr) |
91da1414 | 12071 | { |
31aa7e4e JB |
12072 | low = attr_value_as_address (attr); |
12073 | high = attr_value_as_address (attr_high); | |
12074 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12075 | high += low; | |
91da1414 | 12076 | } |
af34e669 DJ |
12077 | else |
12078 | /* Found high w/o low attribute. */ | |
e385593e | 12079 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
12080 | |
12081 | /* Found consecutive range of addresses. */ | |
3a2b436a | 12082 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 12083 | } |
c906108c | 12084 | else |
af34e669 | 12085 | { |
e142c38c | 12086 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
12087 | if (attr != NULL) |
12088 | { | |
ab435259 DE |
12089 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12090 | We take advantage of the fact that DW_AT_ranges does not appear | |
12091 | in DW_TAG_compile_unit of DWO files. */ | |
12092 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
12093 | unsigned int ranges_offset = (DW_UNSND (attr) | |
12094 | + (need_ranges_base | |
12095 | ? cu->ranges_base | |
12096 | : 0)); | |
2e3cf129 | 12097 | |
af34e669 | 12098 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 12099 | .debug_ranges section. */ |
2e3cf129 | 12100 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 12101 | return PC_BOUNDS_INVALID; |
43039443 | 12102 | /* Found discontinuous range of addresses. */ |
3a2b436a | 12103 | ret = PC_BOUNDS_RANGES; |
af34e669 | 12104 | } |
e385593e JK |
12105 | else |
12106 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 12107 | } |
c906108c | 12108 | |
9373cf26 JK |
12109 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
12110 | if (high <= low) | |
e385593e | 12111 | return PC_BOUNDS_INVALID; |
c906108c SS |
12112 | |
12113 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
12114 | eliminate duplicate copies of functions and vtables and such. | |
12115 | The linker will arbitrarily choose one and discard the others. | |
12116 | The AT_*_pc values for such functions refer to local labels in | |
12117 | these sections. If the section from that file was discarded, the | |
12118 | labels are not in the output, so the relocs get a value of 0. | |
12119 | If this is a discarded function, mark the pc bounds as invalid, | |
12120 | so that GDB will ignore it. */ | |
72dca2f5 | 12121 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 12122 | return PC_BOUNDS_INVALID; |
c906108c SS |
12123 | |
12124 | *lowpc = low; | |
96408a79 SA |
12125 | if (highpc) |
12126 | *highpc = high; | |
af34e669 | 12127 | return ret; |
c906108c SS |
12128 | } |
12129 | ||
b084d499 JB |
12130 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
12131 | its low and high PC addresses. Do nothing if these addresses could not | |
12132 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
12133 | and HIGHPC to the high address if greater than HIGHPC. */ | |
12134 | ||
12135 | static void | |
12136 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
12137 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12138 | struct dwarf2_cu *cu) | |
12139 | { | |
12140 | CORE_ADDR low, high; | |
12141 | struct die_info *child = die->child; | |
12142 | ||
e385593e | 12143 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 12144 | { |
325fac50 PA |
12145 | *lowpc = std::min (*lowpc, low); |
12146 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
12147 | } |
12148 | ||
12149 | /* If the language does not allow nested subprograms (either inside | |
12150 | subprograms or lexical blocks), we're done. */ | |
12151 | if (cu->language != language_ada) | |
12152 | return; | |
6e70227d | 12153 | |
b084d499 JB |
12154 | /* Check all the children of the given DIE. If it contains nested |
12155 | subprograms, then check their pc bounds. Likewise, we need to | |
12156 | check lexical blocks as well, as they may also contain subprogram | |
12157 | definitions. */ | |
12158 | while (child && child->tag) | |
12159 | { | |
12160 | if (child->tag == DW_TAG_subprogram | |
12161 | || child->tag == DW_TAG_lexical_block) | |
12162 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
12163 | child = sibling_die (child); | |
12164 | } | |
12165 | } | |
12166 | ||
fae299cd DC |
12167 | /* Get the low and high pc's represented by the scope DIE, and store |
12168 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
12169 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
12170 | ||
12171 | static void | |
12172 | get_scope_pc_bounds (struct die_info *die, | |
12173 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12174 | struct dwarf2_cu *cu) | |
12175 | { | |
12176 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
12177 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
12178 | CORE_ADDR current_low, current_high; | |
12179 | ||
3a2b436a | 12180 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 12181 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
12182 | { |
12183 | best_low = current_low; | |
12184 | best_high = current_high; | |
12185 | } | |
12186 | else | |
12187 | { | |
12188 | struct die_info *child = die->child; | |
12189 | ||
12190 | while (child && child->tag) | |
12191 | { | |
12192 | switch (child->tag) { | |
12193 | case DW_TAG_subprogram: | |
b084d499 | 12194 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
12195 | break; |
12196 | case DW_TAG_namespace: | |
f55ee35c | 12197 | case DW_TAG_module: |
fae299cd DC |
12198 | /* FIXME: carlton/2004-01-16: Should we do this for |
12199 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
12200 | that current GCC's always emit the DIEs corresponding | |
12201 | to definitions of methods of classes as children of a | |
12202 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
12203 | the DIEs giving the declarations, which could be | |
12204 | anywhere). But I don't see any reason why the | |
12205 | standards says that they have to be there. */ | |
12206 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
12207 | ||
12208 | if (current_low != ((CORE_ADDR) -1)) | |
12209 | { | |
325fac50 PA |
12210 | best_low = std::min (best_low, current_low); |
12211 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
12212 | } |
12213 | break; | |
12214 | default: | |
0963b4bd | 12215 | /* Ignore. */ |
fae299cd DC |
12216 | break; |
12217 | } | |
12218 | ||
12219 | child = sibling_die (child); | |
12220 | } | |
12221 | } | |
12222 | ||
12223 | *lowpc = best_low; | |
12224 | *highpc = best_high; | |
12225 | } | |
12226 | ||
801e3a5b JB |
12227 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
12228 | in DIE. */ | |
380bca97 | 12229 | |
801e3a5b JB |
12230 | static void |
12231 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
12232 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
12233 | { | |
bb5ed363 | 12234 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12235 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 12236 | struct attribute *attr; |
91da1414 | 12237 | struct attribute *attr_high; |
801e3a5b | 12238 | |
91da1414 MW |
12239 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12240 | if (attr_high) | |
801e3a5b | 12241 | { |
801e3a5b JB |
12242 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
12243 | if (attr) | |
12244 | { | |
31aa7e4e JB |
12245 | CORE_ADDR low = attr_value_as_address (attr); |
12246 | CORE_ADDR high = attr_value_as_address (attr_high); | |
12247 | ||
12248 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12249 | high += low; | |
9a619af0 | 12250 | |
3e29f34a MR |
12251 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
12252 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
12253 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
12254 | } |
12255 | } | |
12256 | ||
12257 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12258 | if (attr) | |
12259 | { | |
bb5ed363 | 12260 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12261 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12262 | We take advantage of the fact that DW_AT_ranges does not appear | |
12263 | in DW_TAG_compile_unit of DWO files. */ | |
12264 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12265 | |
12266 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12267 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12268 | unsigned long offset = (DW_UNSND (attr) |
12269 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12270 | const gdb_byte *buffer; |
801e3a5b JB |
12271 | |
12272 | /* For some target architectures, but not others, the | |
12273 | read_address function sign-extends the addresses it returns. | |
12274 | To recognize base address selection entries, we need a | |
12275 | mask. */ | |
12276 | unsigned int addr_size = cu->header.addr_size; | |
12277 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12278 | ||
12279 | /* The base address, to which the next pair is relative. Note | |
12280 | that this 'base' is a DWARF concept: most entries in a range | |
12281 | list are relative, to reduce the number of relocs against the | |
12282 | debugging information. This is separate from this function's | |
12283 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12284 | information from a shared library based on the address at | |
12285 | which the library was loaded. */ | |
d00adf39 DE |
12286 | CORE_ADDR base = cu->base_address; |
12287 | int base_known = cu->base_known; | |
801e3a5b | 12288 | |
d62bfeaf | 12289 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12290 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
12291 | { |
12292 | complaint (&symfile_complaints, | |
12293 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
12294 | offset); | |
12295 | return; | |
12296 | } | |
d62bfeaf | 12297 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
12298 | |
12299 | for (;;) | |
12300 | { | |
12301 | unsigned int bytes_read; | |
12302 | CORE_ADDR start, end; | |
12303 | ||
12304 | start = read_address (obfd, buffer, cu, &bytes_read); | |
12305 | buffer += bytes_read; | |
12306 | end = read_address (obfd, buffer, cu, &bytes_read); | |
12307 | buffer += bytes_read; | |
12308 | ||
12309 | /* Did we find the end of the range list? */ | |
12310 | if (start == 0 && end == 0) | |
12311 | break; | |
12312 | ||
12313 | /* Did we find a base address selection entry? */ | |
12314 | else if ((start & base_select_mask) == base_select_mask) | |
12315 | { | |
12316 | base = end; | |
12317 | base_known = 1; | |
12318 | } | |
12319 | ||
12320 | /* We found an ordinary address range. */ | |
12321 | else | |
12322 | { | |
12323 | if (!base_known) | |
12324 | { | |
12325 | complaint (&symfile_complaints, | |
3e43a32a MS |
12326 | _("Invalid .debug_ranges data " |
12327 | "(no base address)")); | |
801e3a5b JB |
12328 | return; |
12329 | } | |
12330 | ||
9277c30c UW |
12331 | if (start > end) |
12332 | { | |
12333 | /* Inverted range entries are invalid. */ | |
12334 | complaint (&symfile_complaints, | |
12335 | _("Invalid .debug_ranges data " | |
12336 | "(inverted range)")); | |
12337 | return; | |
12338 | } | |
12339 | ||
12340 | /* Empty range entries have no effect. */ | |
12341 | if (start == end) | |
12342 | continue; | |
12343 | ||
01093045 DE |
12344 | start += base + baseaddr; |
12345 | end += base + baseaddr; | |
12346 | ||
12347 | /* A not-uncommon case of bad debug info. | |
12348 | Don't pollute the addrmap with bad data. */ | |
12349 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
12350 | { | |
12351 | complaint (&symfile_complaints, | |
12352 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12353 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12354 | continue; |
12355 | } | |
12356 | ||
3e29f34a MR |
12357 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
12358 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
01093045 | 12359 | record_block_range (block, start, end - 1); |
801e3a5b JB |
12360 | } |
12361 | } | |
12362 | } | |
12363 | } | |
12364 | ||
685b1105 JK |
12365 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12366 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12367 | |
685b1105 JK |
12368 | static void |
12369 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 12370 | { |
38360086 | 12371 | int major, minor; |
60d5a603 JK |
12372 | |
12373 | if (cu->producer == NULL) | |
12374 | { | |
12375 | /* For unknown compilers expect their behavior is DWARF version | |
12376 | compliant. | |
12377 | ||
12378 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12379 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12380 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12381 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12382 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12383 | } |
b1ffba5a | 12384 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 12385 | { |
38360086 MW |
12386 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
12387 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 12388 | } |
61012eef | 12389 | else if (startswith (cu->producer, "Intel(R) C")) |
685b1105 JK |
12390 | cu->producer_is_icc = 1; |
12391 | else | |
12392 | { | |
12393 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12394 | compliant. */ | |
60d5a603 JK |
12395 | } |
12396 | ||
ba919b58 | 12397 | cu->checked_producer = 1; |
685b1105 | 12398 | } |
ba919b58 | 12399 | |
685b1105 JK |
12400 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12401 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12402 | during 4.6.0 experimental. */ | |
12403 | ||
12404 | static int | |
12405 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12406 | { | |
12407 | if (!cu->checked_producer) | |
12408 | check_producer (cu); | |
12409 | ||
12410 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12411 | } |
12412 | ||
12413 | /* Return the default accessibility type if it is not overriden by | |
12414 | DW_AT_accessibility. */ | |
12415 | ||
12416 | static enum dwarf_access_attribute | |
12417 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12418 | { | |
12419 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12420 | { | |
12421 | /* The default DWARF 2 accessibility for members is public, the default | |
12422 | accessibility for inheritance is private. */ | |
12423 | ||
12424 | if (die->tag != DW_TAG_inheritance) | |
12425 | return DW_ACCESS_public; | |
12426 | else | |
12427 | return DW_ACCESS_private; | |
12428 | } | |
12429 | else | |
12430 | { | |
12431 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12432 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12433 | depends on the container kind. */ | |
12434 | ||
12435 | if (die->parent->tag == DW_TAG_class_type) | |
12436 | return DW_ACCESS_private; | |
12437 | else | |
12438 | return DW_ACCESS_public; | |
12439 | } | |
12440 | } | |
12441 | ||
74ac6d43 TT |
12442 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12443 | offset. If the attribute was not found return 0, otherwise return | |
12444 | 1. If it was found but could not properly be handled, set *OFFSET | |
12445 | to 0. */ | |
12446 | ||
12447 | static int | |
12448 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12449 | LONGEST *offset) | |
12450 | { | |
12451 | struct attribute *attr; | |
12452 | ||
12453 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12454 | if (attr != NULL) | |
12455 | { | |
12456 | *offset = 0; | |
12457 | ||
12458 | /* Note that we do not check for a section offset first here. | |
12459 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12460 | so if we see it, we can assume that a constant form is really | |
12461 | a constant and not a section offset. */ | |
12462 | if (attr_form_is_constant (attr)) | |
12463 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12464 | else if (attr_form_is_section_offset (attr)) | |
12465 | dwarf2_complex_location_expr_complaint (); | |
12466 | else if (attr_form_is_block (attr)) | |
12467 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12468 | else | |
12469 | dwarf2_complex_location_expr_complaint (); | |
12470 | ||
12471 | return 1; | |
12472 | } | |
12473 | ||
12474 | return 0; | |
12475 | } | |
12476 | ||
c906108c SS |
12477 | /* Add an aggregate field to the field list. */ |
12478 | ||
12479 | static void | |
107d2387 | 12480 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12481 | struct dwarf2_cu *cu) |
6e70227d | 12482 | { |
e7c27a73 | 12483 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12484 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12485 | struct nextfield *new_field; |
12486 | struct attribute *attr; | |
12487 | struct field *fp; | |
15d034d0 | 12488 | const char *fieldname = ""; |
c906108c SS |
12489 | |
12490 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12491 | new_field = XNEW (struct nextfield); |
b8c9b27d | 12492 | make_cleanup (xfree, new_field); |
c906108c | 12493 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12494 | |
12495 | if (die->tag == DW_TAG_inheritance) | |
12496 | { | |
12497 | new_field->next = fip->baseclasses; | |
12498 | fip->baseclasses = new_field; | |
12499 | } | |
12500 | else | |
12501 | { | |
12502 | new_field->next = fip->fields; | |
12503 | fip->fields = new_field; | |
12504 | } | |
c906108c SS |
12505 | fip->nfields++; |
12506 | ||
e142c38c | 12507 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12508 | if (attr) |
12509 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12510 | else |
12511 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12512 | if (new_field->accessibility != DW_ACCESS_public) |
12513 | fip->non_public_fields = 1; | |
60d5a603 | 12514 | |
e142c38c | 12515 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12516 | if (attr) |
12517 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12518 | else |
12519 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12520 | |
12521 | fp = &new_field->field; | |
a9a9bd0f | 12522 | |
e142c38c | 12523 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12524 | { |
74ac6d43 TT |
12525 | LONGEST offset; |
12526 | ||
a9a9bd0f | 12527 | /* Data member other than a C++ static data member. */ |
6e70227d | 12528 | |
c906108c | 12529 | /* Get type of field. */ |
e7c27a73 | 12530 | fp->type = die_type (die, cu); |
c906108c | 12531 | |
d6a843b5 | 12532 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12533 | |
c906108c | 12534 | /* Get bit size of field (zero if none). */ |
e142c38c | 12535 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12536 | if (attr) |
12537 | { | |
12538 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12539 | } | |
12540 | else | |
12541 | { | |
12542 | FIELD_BITSIZE (*fp) = 0; | |
12543 | } | |
12544 | ||
12545 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12546 | if (handle_data_member_location (die, cu, &offset)) |
12547 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12548 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12549 | if (attr) |
12550 | { | |
5e2b427d | 12551 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12552 | { |
12553 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12554 | additional bit offset from the MSB of the containing |
12555 | anonymous object to the MSB of the field. We don't | |
12556 | have to do anything special since we don't need to | |
12557 | know the size of the anonymous object. */ | |
f41f5e61 | 12558 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12559 | } |
12560 | else | |
12561 | { | |
12562 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12563 | MSB of the anonymous object, subtract off the number of |
12564 | bits from the MSB of the field to the MSB of the | |
12565 | object, and then subtract off the number of bits of | |
12566 | the field itself. The result is the bit offset of | |
12567 | the LSB of the field. */ | |
c906108c SS |
12568 | int anonymous_size; |
12569 | int bit_offset = DW_UNSND (attr); | |
12570 | ||
e142c38c | 12571 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12572 | if (attr) |
12573 | { | |
12574 | /* The size of the anonymous object containing | |
12575 | the bit field is explicit, so use the | |
12576 | indicated size (in bytes). */ | |
12577 | anonymous_size = DW_UNSND (attr); | |
12578 | } | |
12579 | else | |
12580 | { | |
12581 | /* The size of the anonymous object containing | |
12582 | the bit field must be inferred from the type | |
12583 | attribute of the data member containing the | |
12584 | bit field. */ | |
12585 | anonymous_size = TYPE_LENGTH (fp->type); | |
12586 | } | |
f41f5e61 PA |
12587 | SET_FIELD_BITPOS (*fp, |
12588 | (FIELD_BITPOS (*fp) | |
12589 | + anonymous_size * bits_per_byte | |
12590 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
12591 | } |
12592 | } | |
da5b30da AA |
12593 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
12594 | if (attr != NULL) | |
12595 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
12596 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
12597 | |
12598 | /* Get name of field. */ | |
39cbfefa DJ |
12599 | fieldname = dwarf2_name (die, cu); |
12600 | if (fieldname == NULL) | |
12601 | fieldname = ""; | |
d8151005 DJ |
12602 | |
12603 | /* The name is already allocated along with this objfile, so we don't | |
12604 | need to duplicate it for the type. */ | |
12605 | fp->name = fieldname; | |
c906108c SS |
12606 | |
12607 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 12608 | pointer or virtual base class pointer) to private. */ |
e142c38c | 12609 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 12610 | { |
d48cc9dd | 12611 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
12612 | new_field->accessibility = DW_ACCESS_private; |
12613 | fip->non_public_fields = 1; | |
12614 | } | |
12615 | } | |
a9a9bd0f | 12616 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 12617 | { |
a9a9bd0f DC |
12618 | /* C++ static member. */ |
12619 | ||
12620 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
12621 | is a declaration, but all versions of G++ as of this writing | |
12622 | (so through at least 3.2.1) incorrectly generate | |
12623 | DW_TAG_variable tags. */ | |
6e70227d | 12624 | |
ff355380 | 12625 | const char *physname; |
c906108c | 12626 | |
a9a9bd0f | 12627 | /* Get name of field. */ |
39cbfefa DJ |
12628 | fieldname = dwarf2_name (die, cu); |
12629 | if (fieldname == NULL) | |
c906108c SS |
12630 | return; |
12631 | ||
254e6b9e | 12632 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
12633 | if (attr |
12634 | /* Only create a symbol if this is an external value. | |
12635 | new_symbol checks this and puts the value in the global symbol | |
12636 | table, which we want. If it is not external, new_symbol | |
12637 | will try to put the value in cu->list_in_scope which is wrong. */ | |
12638 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
12639 | { |
12640 | /* A static const member, not much different than an enum as far as | |
12641 | we're concerned, except that we can support more types. */ | |
12642 | new_symbol (die, NULL, cu); | |
12643 | } | |
12644 | ||
2df3850c | 12645 | /* Get physical name. */ |
ff355380 | 12646 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 12647 | |
d8151005 DJ |
12648 | /* The name is already allocated along with this objfile, so we don't |
12649 | need to duplicate it for the type. */ | |
12650 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 12651 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 12652 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
12653 | } |
12654 | else if (die->tag == DW_TAG_inheritance) | |
12655 | { | |
74ac6d43 | 12656 | LONGEST offset; |
d4b96c9a | 12657 | |
74ac6d43 TT |
12658 | /* C++ base class field. */ |
12659 | if (handle_data_member_location (die, cu, &offset)) | |
12660 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 12661 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 12662 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
12663 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
12664 | fip->nbaseclasses++; | |
12665 | } | |
12666 | } | |
12667 | ||
98751a41 JK |
12668 | /* Add a typedef defined in the scope of the FIP's class. */ |
12669 | ||
12670 | static void | |
12671 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
12672 | struct dwarf2_cu *cu) | |
6e70227d | 12673 | { |
98751a41 | 12674 | struct typedef_field_list *new_field; |
98751a41 | 12675 | struct typedef_field *fp; |
98751a41 JK |
12676 | |
12677 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12678 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
12679 | make_cleanup (xfree, new_field); |
12680 | ||
12681 | gdb_assert (die->tag == DW_TAG_typedef); | |
12682 | ||
12683 | fp = &new_field->field; | |
12684 | ||
12685 | /* Get name of field. */ | |
12686 | fp->name = dwarf2_name (die, cu); | |
12687 | if (fp->name == NULL) | |
12688 | return; | |
12689 | ||
12690 | fp->type = read_type_die (die, cu); | |
12691 | ||
12692 | new_field->next = fip->typedef_field_list; | |
12693 | fip->typedef_field_list = new_field; | |
12694 | fip->typedef_field_list_count++; | |
12695 | } | |
12696 | ||
c906108c SS |
12697 | /* Create the vector of fields, and attach it to the type. */ |
12698 | ||
12699 | static void | |
fba45db2 | 12700 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12701 | struct dwarf2_cu *cu) |
c906108c SS |
12702 | { |
12703 | int nfields = fip->nfields; | |
12704 | ||
12705 | /* Record the field count, allocate space for the array of fields, | |
12706 | and create blank accessibility bitfields if necessary. */ | |
12707 | TYPE_NFIELDS (type) = nfields; | |
12708 | TYPE_FIELDS (type) = (struct field *) | |
12709 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
12710 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
12711 | ||
b4ba55a1 | 12712 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
12713 | { |
12714 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12715 | ||
12716 | TYPE_FIELD_PRIVATE_BITS (type) = | |
12717 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12718 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
12719 | ||
12720 | TYPE_FIELD_PROTECTED_BITS (type) = | |
12721 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12722 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
12723 | ||
774b6a14 TT |
12724 | TYPE_FIELD_IGNORE_BITS (type) = |
12725 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12726 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
12727 | } |
12728 | ||
12729 | /* If the type has baseclasses, allocate and clear a bit vector for | |
12730 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 12731 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
12732 | { |
12733 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 12734 | unsigned char *pointer; |
c906108c SS |
12735 | |
12736 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 12737 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 12738 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
12739 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
12740 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
12741 | } | |
12742 | ||
3e43a32a MS |
12743 | /* Copy the saved-up fields into the field vector. Start from the head of |
12744 | the list, adding to the tail of the field array, so that they end up in | |
12745 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
12746 | while (nfields-- > 0) |
12747 | { | |
7d0ccb61 DJ |
12748 | struct nextfield *fieldp; |
12749 | ||
12750 | if (fip->fields) | |
12751 | { | |
12752 | fieldp = fip->fields; | |
12753 | fip->fields = fieldp->next; | |
12754 | } | |
12755 | else | |
12756 | { | |
12757 | fieldp = fip->baseclasses; | |
12758 | fip->baseclasses = fieldp->next; | |
12759 | } | |
12760 | ||
12761 | TYPE_FIELD (type, nfields) = fieldp->field; | |
12762 | switch (fieldp->accessibility) | |
c906108c | 12763 | { |
c5aa993b | 12764 | case DW_ACCESS_private: |
b4ba55a1 JB |
12765 | if (cu->language != language_ada) |
12766 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 12767 | break; |
c906108c | 12768 | |
c5aa993b | 12769 | case DW_ACCESS_protected: |
b4ba55a1 JB |
12770 | if (cu->language != language_ada) |
12771 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 12772 | break; |
c906108c | 12773 | |
c5aa993b JM |
12774 | case DW_ACCESS_public: |
12775 | break; | |
c906108c | 12776 | |
c5aa993b JM |
12777 | default: |
12778 | /* Unknown accessibility. Complain and treat it as public. */ | |
12779 | { | |
e2e0b3e5 | 12780 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 12781 | fieldp->accessibility); |
c5aa993b JM |
12782 | } |
12783 | break; | |
c906108c SS |
12784 | } |
12785 | if (nfields < fip->nbaseclasses) | |
12786 | { | |
7d0ccb61 | 12787 | switch (fieldp->virtuality) |
c906108c | 12788 | { |
c5aa993b JM |
12789 | case DW_VIRTUALITY_virtual: |
12790 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 12791 | if (cu->language == language_ada) |
a73c6dcd | 12792 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
12793 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
12794 | break; | |
c906108c SS |
12795 | } |
12796 | } | |
c906108c SS |
12797 | } |
12798 | } | |
12799 | ||
7d27a96d TT |
12800 | /* Return true if this member function is a constructor, false |
12801 | otherwise. */ | |
12802 | ||
12803 | static int | |
12804 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
12805 | { | |
12806 | const char *fieldname; | |
fe978cb0 | 12807 | const char *type_name; |
7d27a96d TT |
12808 | int len; |
12809 | ||
12810 | if (die->parent == NULL) | |
12811 | return 0; | |
12812 | ||
12813 | if (die->parent->tag != DW_TAG_structure_type | |
12814 | && die->parent->tag != DW_TAG_union_type | |
12815 | && die->parent->tag != DW_TAG_class_type) | |
12816 | return 0; | |
12817 | ||
12818 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
12819 | type_name = dwarf2_name (die->parent, cu); |
12820 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
12821 | return 0; |
12822 | ||
12823 | len = strlen (fieldname); | |
fe978cb0 PA |
12824 | return (strncmp (fieldname, type_name, len) == 0 |
12825 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
12826 | } |
12827 | ||
c906108c SS |
12828 | /* Add a member function to the proper fieldlist. */ |
12829 | ||
12830 | static void | |
107d2387 | 12831 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12832 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 12833 | { |
e7c27a73 | 12834 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12835 | struct attribute *attr; |
12836 | struct fnfieldlist *flp; | |
12837 | int i; | |
12838 | struct fn_field *fnp; | |
15d034d0 | 12839 | const char *fieldname; |
c906108c | 12840 | struct nextfnfield *new_fnfield; |
f792889a | 12841 | struct type *this_type; |
60d5a603 | 12842 | enum dwarf_access_attribute accessibility; |
c906108c | 12843 | |
b4ba55a1 | 12844 | if (cu->language == language_ada) |
a73c6dcd | 12845 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 12846 | |
2df3850c | 12847 | /* Get name of member function. */ |
39cbfefa DJ |
12848 | fieldname = dwarf2_name (die, cu); |
12849 | if (fieldname == NULL) | |
2df3850c | 12850 | return; |
c906108c | 12851 | |
c906108c SS |
12852 | /* Look up member function name in fieldlist. */ |
12853 | for (i = 0; i < fip->nfnfields; i++) | |
12854 | { | |
27bfe10e | 12855 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
12856 | break; |
12857 | } | |
12858 | ||
12859 | /* Create new list element if necessary. */ | |
12860 | if (i < fip->nfnfields) | |
12861 | flp = &fip->fnfieldlists[i]; | |
12862 | else | |
12863 | { | |
12864 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12865 | { | |
12866 | fip->fnfieldlists = (struct fnfieldlist *) | |
12867 | xrealloc (fip->fnfieldlists, | |
12868 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12869 | * sizeof (struct fnfieldlist)); |
c906108c | 12870 | if (fip->nfnfields == 0) |
c13c43fd | 12871 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
12872 | } |
12873 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
12874 | flp->name = fieldname; | |
12875 | flp->length = 0; | |
12876 | flp->head = NULL; | |
3da10d80 | 12877 | i = fip->nfnfields++; |
c906108c SS |
12878 | } |
12879 | ||
12880 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 12881 | entry. */ |
8d749320 | 12882 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 12883 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
12884 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
12885 | new_fnfield->next = flp->head; | |
12886 | flp->head = new_fnfield; | |
12887 | flp->length++; | |
12888 | ||
12889 | /* Fill in the member function field info. */ | |
12890 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
12891 | |
12892 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 12893 | if (cu->language == language_cplus) |
3da10d80 KS |
12894 | { |
12895 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
12896 | die, cu); | |
12897 | } | |
12898 | else | |
12899 | { | |
1d06ead6 | 12900 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
12901 | fnp->physname = physname ? physname : ""; |
12902 | } | |
12903 | ||
c906108c | 12904 | fnp->type = alloc_type (objfile); |
f792889a DJ |
12905 | this_type = read_type_die (die, cu); |
12906 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 12907 | { |
f792889a | 12908 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 12909 | |
f792889a | 12910 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
12911 | of the method itself (TYPE_CODE_METHOD). */ |
12912 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
12913 | TYPE_TARGET_TYPE (this_type), |
12914 | TYPE_FIELDS (this_type), | |
12915 | TYPE_NFIELDS (this_type), | |
12916 | TYPE_VARARGS (this_type)); | |
c906108c SS |
12917 | |
12918 | /* Handle static member functions. | |
c5aa993b | 12919 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
12920 | member functions. G++ helps GDB by marking the first |
12921 | parameter for non-static member functions (which is the this | |
12922 | pointer) as artificial. We obtain this information from | |
12923 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 12924 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
12925 | fnp->voffset = VOFFSET_STATIC; |
12926 | } | |
12927 | else | |
e2e0b3e5 | 12928 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 12929 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
12930 | |
12931 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 12932 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 12933 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 12934 | |
3e43a32a MS |
12935 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
12936 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
12937 | |
12938 | /* Get accessibility. */ | |
e142c38c | 12939 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 12940 | if (attr) |
aead7601 | 12941 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
12942 | else |
12943 | accessibility = dwarf2_default_access_attribute (die, cu); | |
12944 | switch (accessibility) | |
c906108c | 12945 | { |
60d5a603 JK |
12946 | case DW_ACCESS_private: |
12947 | fnp->is_private = 1; | |
12948 | break; | |
12949 | case DW_ACCESS_protected: | |
12950 | fnp->is_protected = 1; | |
12951 | break; | |
c906108c SS |
12952 | } |
12953 | ||
b02dede2 | 12954 | /* Check for artificial methods. */ |
e142c38c | 12955 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
12956 | if (attr && DW_UNSND (attr) != 0) |
12957 | fnp->is_artificial = 1; | |
12958 | ||
7d27a96d TT |
12959 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
12960 | ||
0d564a31 | 12961 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
12962 | function. For older versions of GCC, this is an offset in the |
12963 | appropriate virtual table, as specified by DW_AT_containing_type. | |
12964 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
12965 | to the object address. */ |
12966 | ||
e142c38c | 12967 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 12968 | if (attr) |
8e19ed76 | 12969 | { |
aec5aa8b | 12970 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 12971 | { |
aec5aa8b TT |
12972 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
12973 | { | |
12974 | /* Old-style GCC. */ | |
12975 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
12976 | } | |
12977 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12978 | || (DW_BLOCK (attr)->size > 1 | |
12979 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
12980 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
12981 | { | |
aec5aa8b TT |
12982 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
12983 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
12984 | dwarf2_complex_location_expr_complaint (); | |
12985 | else | |
12986 | fnp->voffset /= cu->header.addr_size; | |
12987 | fnp->voffset += 2; | |
12988 | } | |
12989 | else | |
12990 | dwarf2_complex_location_expr_complaint (); | |
12991 | ||
12992 | if (!fnp->fcontext) | |
7e993ebf KS |
12993 | { |
12994 | /* If there is no `this' field and no DW_AT_containing_type, | |
12995 | we cannot actually find a base class context for the | |
12996 | vtable! */ | |
12997 | if (TYPE_NFIELDS (this_type) == 0 | |
12998 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
12999 | { | |
13000 | complaint (&symfile_complaints, | |
13001 | _("cannot determine context for virtual member " | |
13002 | "function \"%s\" (offset %d)"), | |
13003 | fieldname, die->offset.sect_off); | |
13004 | } | |
13005 | else | |
13006 | { | |
13007 | fnp->fcontext | |
13008 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
13009 | } | |
13010 | } | |
aec5aa8b | 13011 | } |
3690dd37 | 13012 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 13013 | { |
4d3c2250 | 13014 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13015 | } |
13016 | else | |
13017 | { | |
4d3c2250 KB |
13018 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
13019 | fieldname); | |
8e19ed76 | 13020 | } |
0d564a31 | 13021 | } |
d48cc9dd DJ |
13022 | else |
13023 | { | |
13024 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
13025 | if (attr && DW_UNSND (attr)) | |
13026 | { | |
13027 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
13028 | complaint (&symfile_complaints, | |
3e43a32a MS |
13029 | _("Member function \"%s\" (offset %d) is virtual " |
13030 | "but the vtable offset is not specified"), | |
b64f50a1 | 13031 | fieldname, die->offset.sect_off); |
9655fd1a | 13032 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
13033 | TYPE_CPLUS_DYNAMIC (type) = 1; |
13034 | } | |
13035 | } | |
c906108c SS |
13036 | } |
13037 | ||
13038 | /* Create the vector of member function fields, and attach it to the type. */ | |
13039 | ||
13040 | static void | |
fba45db2 | 13041 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13042 | struct dwarf2_cu *cu) |
c906108c SS |
13043 | { |
13044 | struct fnfieldlist *flp; | |
c906108c SS |
13045 | int i; |
13046 | ||
b4ba55a1 | 13047 | if (cu->language == language_ada) |
a73c6dcd | 13048 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 13049 | |
c906108c SS |
13050 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
13051 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
13052 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
13053 | ||
13054 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
13055 | { | |
13056 | struct nextfnfield *nfp = flp->head; | |
13057 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
13058 | int k; | |
13059 | ||
13060 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
13061 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
13062 | fn_flp->fn_fields = (struct fn_field *) | |
13063 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
13064 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 13065 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
13066 | } |
13067 | ||
13068 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
13069 | } |
13070 | ||
1168df01 JB |
13071 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
13072 | language, zero otherwise. */ | |
13073 | static int | |
13074 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
13075 | { | |
13076 | static const char vptr[] = "_vptr"; | |
987504bb | 13077 | static const char vtable[] = "vtable"; |
1168df01 | 13078 | |
9c37b5ae TT |
13079 | /* Look for the C++ form of the vtable. */ |
13080 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
13081 | return 1; |
13082 | ||
13083 | return 0; | |
13084 | } | |
13085 | ||
c0dd20ea | 13086 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
13087 | functions, with the ABI-specified layout. If TYPE describes |
13088 | such a structure, smash it into a member function type. | |
61049d3b DJ |
13089 | |
13090 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
13091 | This is GCC PR debug/28767. */ | |
c0dd20ea | 13092 | |
0b92b5bb TT |
13093 | static void |
13094 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 13095 | { |
09e2d7c7 | 13096 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
13097 | |
13098 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
13099 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
13100 | return; | |
c0dd20ea DJ |
13101 | |
13102 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
13103 | if (TYPE_FIELD_NAME (type, 0) == NULL |
13104 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
13105 | || TYPE_FIELD_NAME (type, 1) == NULL | |
13106 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
13107 | return; | |
c0dd20ea DJ |
13108 | |
13109 | /* Find the type of the method. */ | |
0b92b5bb | 13110 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
13111 | if (pfn_type == NULL |
13112 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
13113 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 13114 | return; |
c0dd20ea DJ |
13115 | |
13116 | /* Look for the "this" argument. */ | |
13117 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
13118 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 13119 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 13120 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 13121 | return; |
c0dd20ea | 13122 | |
09e2d7c7 | 13123 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 13124 | new_type = alloc_type (objfile); |
09e2d7c7 | 13125 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
13126 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
13127 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 13128 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 13129 | } |
1168df01 | 13130 | |
685b1105 JK |
13131 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
13132 | (icc). */ | |
13133 | ||
13134 | static int | |
13135 | producer_is_icc (struct dwarf2_cu *cu) | |
13136 | { | |
13137 | if (!cu->checked_producer) | |
13138 | check_producer (cu); | |
13139 | ||
13140 | return cu->producer_is_icc; | |
13141 | } | |
13142 | ||
c906108c | 13143 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
13144 | (definition) to create a type for the structure or union. Fill in |
13145 | the type's name and general properties; the members will not be | |
83655187 DE |
13146 | processed until process_structure_scope. A symbol table entry for |
13147 | the type will also not be done until process_structure_scope (assuming | |
13148 | the type has a name). | |
c906108c | 13149 | |
c767944b DJ |
13150 | NOTE: we need to call these functions regardless of whether or not the |
13151 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 13152 | structure or union. This gets the type entered into our set of |
83655187 | 13153 | user defined types. */ |
c906108c | 13154 | |
f792889a | 13155 | static struct type * |
134d01f1 | 13156 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13157 | { |
e7c27a73 | 13158 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13159 | struct type *type; |
13160 | struct attribute *attr; | |
15d034d0 | 13161 | const char *name; |
c906108c | 13162 | |
348e048f DE |
13163 | /* If the definition of this type lives in .debug_types, read that type. |
13164 | Don't follow DW_AT_specification though, that will take us back up | |
13165 | the chain and we want to go down. */ | |
45e58e77 | 13166 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13167 | if (attr) |
13168 | { | |
ac9ec31b | 13169 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13170 | |
ac9ec31b | 13171 | /* The type's CU may not be the same as CU. |
02142a6c | 13172 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13173 | return set_die_type (die, type, cu); |
13174 | } | |
13175 | ||
c0dd20ea | 13176 | type = alloc_type (objfile); |
c906108c | 13177 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 13178 | |
39cbfefa DJ |
13179 | name = dwarf2_name (die, cu); |
13180 | if (name != NULL) | |
c906108c | 13181 | { |
987504bb | 13182 | if (cu->language == language_cplus |
c44af4eb TT |
13183 | || cu->language == language_d |
13184 | || cu->language == language_rust) | |
63d06c5c | 13185 | { |
15d034d0 | 13186 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
13187 | |
13188 | /* dwarf2_full_name might have already finished building the DIE's | |
13189 | type. If so, there is no need to continue. */ | |
13190 | if (get_die_type (die, cu) != NULL) | |
13191 | return get_die_type (die, cu); | |
13192 | ||
13193 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
13194 | if (die->tag == DW_TAG_structure_type |
13195 | || die->tag == DW_TAG_class_type) | |
13196 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
13197 | } |
13198 | else | |
13199 | { | |
d8151005 DJ |
13200 | /* The name is already allocated along with this objfile, so |
13201 | we don't need to duplicate it for the type. */ | |
7d455152 | 13202 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
13203 | if (die->tag == DW_TAG_class_type) |
13204 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 13205 | } |
c906108c SS |
13206 | } |
13207 | ||
13208 | if (die->tag == DW_TAG_structure_type) | |
13209 | { | |
13210 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
13211 | } | |
13212 | else if (die->tag == DW_TAG_union_type) | |
13213 | { | |
13214 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
13215 | } | |
13216 | else | |
13217 | { | |
4753d33b | 13218 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
13219 | } |
13220 | ||
0cc2414c TT |
13221 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
13222 | TYPE_DECLARED_CLASS (type) = 1; | |
13223 | ||
e142c38c | 13224 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13225 | if (attr) |
13226 | { | |
155bfbd3 JB |
13227 | if (attr_form_is_constant (attr)) |
13228 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13229 | else | |
13230 | { | |
13231 | /* For the moment, dynamic type sizes are not supported | |
13232 | by GDB's struct type. The actual size is determined | |
13233 | on-demand when resolving the type of a given object, | |
13234 | so set the type's length to zero for now. Otherwise, | |
13235 | we record an expression as the length, and that expression | |
13236 | could lead to a very large value, which could eventually | |
13237 | lead to us trying to allocate that much memory when creating | |
13238 | a value of that type. */ | |
13239 | TYPE_LENGTH (type) = 0; | |
13240 | } | |
c906108c SS |
13241 | } |
13242 | else | |
13243 | { | |
13244 | TYPE_LENGTH (type) = 0; | |
13245 | } | |
13246 | ||
422b1cb0 | 13247 | if (producer_is_icc (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 JK |
13248 | { |
13249 | /* ICC does not output the required DW_AT_declaration | |
13250 | on incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 13251 | TYPE_STUB (type) = 1; |
685b1105 JK |
13252 | } |
13253 | else | |
13254 | TYPE_STUB_SUPPORTED (type) = 1; | |
13255 | ||
dc718098 | 13256 | if (die_is_declaration (die, cu)) |
876cecd0 | 13257 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
13258 | else if (attr == NULL && die->child == NULL |
13259 | && producer_is_realview (cu->producer)) | |
13260 | /* RealView does not output the required DW_AT_declaration | |
13261 | on incomplete types. */ | |
13262 | TYPE_STUB (type) = 1; | |
dc718098 | 13263 | |
c906108c SS |
13264 | /* We need to add the type field to the die immediately so we don't |
13265 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13266 | type within the structure itself. */ |
1c379e20 | 13267 | set_die_type (die, type, cu); |
c906108c | 13268 | |
7e314c57 JK |
13269 | /* set_die_type should be already done. */ |
13270 | set_descriptive_type (type, die, cu); | |
13271 | ||
c767944b DJ |
13272 | return type; |
13273 | } | |
13274 | ||
13275 | /* Finish creating a structure or union type, including filling in | |
13276 | its members and creating a symbol for it. */ | |
13277 | ||
13278 | static void | |
13279 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13280 | { | |
13281 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13282 | struct die_info *child_die; |
c767944b DJ |
13283 | struct type *type; |
13284 | ||
13285 | type = get_die_type (die, cu); | |
13286 | if (type == NULL) | |
13287 | type = read_structure_type (die, cu); | |
13288 | ||
e142c38c | 13289 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13290 | { |
13291 | struct field_info fi; | |
34eaf542 | 13292 | VEC (symbolp) *template_args = NULL; |
c767944b | 13293 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13294 | |
13295 | memset (&fi, 0, sizeof (struct field_info)); | |
13296 | ||
639d11d3 | 13297 | child_die = die->child; |
c906108c SS |
13298 | |
13299 | while (child_die && child_die->tag) | |
13300 | { | |
a9a9bd0f DC |
13301 | if (child_die->tag == DW_TAG_member |
13302 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13303 | { |
a9a9bd0f DC |
13304 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13305 | should be a DW_TAG_member that is a declaration, but | |
13306 | all versions of G++ as of this writing (so through at | |
13307 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13308 | tags for them instead. */ | |
e7c27a73 | 13309 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13310 | } |
8713b1b1 | 13311 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13312 | { |
e98c9e7c TT |
13313 | /* Rust doesn't have member functions in the C++ sense. |
13314 | However, it does emit ordinary functions as children | |
13315 | of a struct DIE. */ | |
13316 | if (cu->language == language_rust) | |
13317 | read_func_scope (child_die, cu); | |
13318 | else | |
13319 | { | |
13320 | /* C++ member function. */ | |
13321 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
13322 | } | |
c906108c SS |
13323 | } |
13324 | else if (child_die->tag == DW_TAG_inheritance) | |
13325 | { | |
13326 | /* C++ base class field. */ | |
e7c27a73 | 13327 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13328 | } |
98751a41 JK |
13329 | else if (child_die->tag == DW_TAG_typedef) |
13330 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13331 | else if (child_die->tag == DW_TAG_template_type_param |
13332 | || child_die->tag == DW_TAG_template_value_param) | |
13333 | { | |
13334 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13335 | ||
f1078f66 DJ |
13336 | if (arg != NULL) |
13337 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13338 | } |
13339 | ||
c906108c SS |
13340 | child_die = sibling_die (child_die); |
13341 | } | |
13342 | ||
34eaf542 TT |
13343 | /* Attach template arguments to type. */ |
13344 | if (! VEC_empty (symbolp, template_args)) | |
13345 | { | |
13346 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13347 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13348 | = VEC_length (symbolp, template_args); | |
13349 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
13350 | = XOBNEWVEC (&objfile->objfile_obstack, |
13351 | struct symbol *, | |
13352 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
13353 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
13354 | VEC_address (symbolp, template_args), | |
13355 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13356 | * sizeof (struct symbol *))); | |
13357 | VEC_free (symbolp, template_args); | |
13358 | } | |
13359 | ||
c906108c SS |
13360 | /* Attach fields and member functions to the type. */ |
13361 | if (fi.nfields) | |
e7c27a73 | 13362 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13363 | if (fi.nfnfields) |
13364 | { | |
e7c27a73 | 13365 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13366 | |
c5aa993b | 13367 | /* Get the type which refers to the base class (possibly this |
c906108c | 13368 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13369 | class from the DW_AT_containing_type attribute. This use of |
13370 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13371 | |
e142c38c | 13372 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13373 | { |
e7c27a73 | 13374 | struct type *t = die_containing_type (die, cu); |
c906108c | 13375 | |
ae6ae975 | 13376 | set_type_vptr_basetype (type, t); |
c906108c SS |
13377 | if (type == t) |
13378 | { | |
c906108c SS |
13379 | int i; |
13380 | ||
13381 | /* Our own class provides vtbl ptr. */ | |
13382 | for (i = TYPE_NFIELDS (t) - 1; | |
13383 | i >= TYPE_N_BASECLASSES (t); | |
13384 | --i) | |
13385 | { | |
0d5cff50 | 13386 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13387 | |
1168df01 | 13388 | if (is_vtable_name (fieldname, cu)) |
c906108c | 13389 | { |
ae6ae975 | 13390 | set_type_vptr_fieldno (type, i); |
c906108c SS |
13391 | break; |
13392 | } | |
13393 | } | |
13394 | ||
13395 | /* Complain if virtual function table field not found. */ | |
13396 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13397 | complaint (&symfile_complaints, |
3e43a32a MS |
13398 | _("virtual function table pointer " |
13399 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13400 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13401 | ""); | |
c906108c SS |
13402 | } |
13403 | else | |
13404 | { | |
ae6ae975 | 13405 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
13406 | } |
13407 | } | |
f6235d4c | 13408 | else if (cu->producer |
61012eef | 13409 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
13410 | { |
13411 | /* The IBM XLC compiler does not provide direct indication | |
13412 | of the containing type, but the vtable pointer is | |
13413 | always named __vfp. */ | |
13414 | ||
13415 | int i; | |
13416 | ||
13417 | for (i = TYPE_NFIELDS (type) - 1; | |
13418 | i >= TYPE_N_BASECLASSES (type); | |
13419 | --i) | |
13420 | { | |
13421 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13422 | { | |
ae6ae975 DE |
13423 | set_type_vptr_fieldno (type, i); |
13424 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
13425 | break; |
13426 | } | |
13427 | } | |
13428 | } | |
c906108c | 13429 | } |
98751a41 JK |
13430 | |
13431 | /* Copy fi.typedef_field_list linked list elements content into the | |
13432 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13433 | if (fi.typedef_field_list) | |
13434 | { | |
13435 | int i = fi.typedef_field_list_count; | |
13436 | ||
a0d7a4ff | 13437 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 13438 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
13439 | = ((struct typedef_field *) |
13440 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
13441 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
13442 | ||
13443 | /* Reverse the list order to keep the debug info elements order. */ | |
13444 | while (--i >= 0) | |
13445 | { | |
13446 | struct typedef_field *dest, *src; | |
6e70227d | 13447 | |
98751a41 JK |
13448 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13449 | src = &fi.typedef_field_list->field; | |
13450 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13451 | *dest = *src; | |
13452 | } | |
13453 | } | |
c767944b DJ |
13454 | |
13455 | do_cleanups (back_to); | |
c906108c | 13456 | } |
63d06c5c | 13457 | |
bb5ed363 | 13458 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13459 | |
90aeadfc DC |
13460 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13461 | snapshots) has been known to create a die giving a declaration | |
13462 | for a class that has, as a child, a die giving a definition for a | |
13463 | nested class. So we have to process our children even if the | |
13464 | current die is a declaration. Normally, of course, a declaration | |
13465 | won't have any children at all. */ | |
134d01f1 | 13466 | |
ca040673 DE |
13467 | child_die = die->child; |
13468 | ||
90aeadfc DC |
13469 | while (child_die != NULL && child_die->tag) |
13470 | { | |
13471 | if (child_die->tag == DW_TAG_member | |
13472 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13473 | || child_die->tag == DW_TAG_inheritance |
13474 | || child_die->tag == DW_TAG_template_value_param | |
13475 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13476 | { |
90aeadfc | 13477 | /* Do nothing. */ |
134d01f1 | 13478 | } |
90aeadfc DC |
13479 | else |
13480 | process_die (child_die, cu); | |
134d01f1 | 13481 | |
90aeadfc | 13482 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13483 | } |
13484 | ||
fa4028e9 JB |
13485 | /* Do not consider external references. According to the DWARF standard, |
13486 | these DIEs are identified by the fact that they have no byte_size | |
13487 | attribute, and a declaration attribute. */ | |
13488 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13489 | || !die_is_declaration (die, cu)) | |
c767944b | 13490 | new_symbol (die, type, cu); |
134d01f1 DJ |
13491 | } |
13492 | ||
55426c9d JB |
13493 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13494 | update TYPE using some information only available in DIE's children. */ | |
13495 | ||
13496 | static void | |
13497 | update_enumeration_type_from_children (struct die_info *die, | |
13498 | struct type *type, | |
13499 | struct dwarf2_cu *cu) | |
13500 | { | |
13501 | struct obstack obstack; | |
60f7655a | 13502 | struct die_info *child_die; |
55426c9d JB |
13503 | int unsigned_enum = 1; |
13504 | int flag_enum = 1; | |
13505 | ULONGEST mask = 0; | |
13506 | struct cleanup *old_chain; | |
13507 | ||
13508 | obstack_init (&obstack); | |
13509 | old_chain = make_cleanup_obstack_free (&obstack); | |
13510 | ||
60f7655a DE |
13511 | for (child_die = die->child; |
13512 | child_die != NULL && child_die->tag; | |
13513 | child_die = sibling_die (child_die)) | |
55426c9d JB |
13514 | { |
13515 | struct attribute *attr; | |
13516 | LONGEST value; | |
13517 | const gdb_byte *bytes; | |
13518 | struct dwarf2_locexpr_baton *baton; | |
13519 | const char *name; | |
60f7655a | 13520 | |
55426c9d JB |
13521 | if (child_die->tag != DW_TAG_enumerator) |
13522 | continue; | |
13523 | ||
13524 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13525 | if (attr == NULL) | |
13526 | continue; | |
13527 | ||
13528 | name = dwarf2_name (child_die, cu); | |
13529 | if (name == NULL) | |
13530 | name = "<anonymous enumerator>"; | |
13531 | ||
13532 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13533 | &value, &bytes, &baton); | |
13534 | if (value < 0) | |
13535 | { | |
13536 | unsigned_enum = 0; | |
13537 | flag_enum = 0; | |
13538 | } | |
13539 | else if ((mask & value) != 0) | |
13540 | flag_enum = 0; | |
13541 | else | |
13542 | mask |= value; | |
13543 | ||
13544 | /* If we already know that the enum type is neither unsigned, nor | |
13545 | a flag type, no need to look at the rest of the enumerates. */ | |
13546 | if (!unsigned_enum && !flag_enum) | |
13547 | break; | |
55426c9d JB |
13548 | } |
13549 | ||
13550 | if (unsigned_enum) | |
13551 | TYPE_UNSIGNED (type) = 1; | |
13552 | if (flag_enum) | |
13553 | TYPE_FLAG_ENUM (type) = 1; | |
13554 | ||
13555 | do_cleanups (old_chain); | |
13556 | } | |
13557 | ||
134d01f1 DJ |
13558 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
13559 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 13560 | |
f792889a | 13561 | static struct type * |
134d01f1 | 13562 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13563 | { |
e7c27a73 | 13564 | struct objfile *objfile = cu->objfile; |
c906108c | 13565 | struct type *type; |
c906108c | 13566 | struct attribute *attr; |
0114d602 | 13567 | const char *name; |
134d01f1 | 13568 | |
348e048f DE |
13569 | /* If the definition of this type lives in .debug_types, read that type. |
13570 | Don't follow DW_AT_specification though, that will take us back up | |
13571 | the chain and we want to go down. */ | |
45e58e77 | 13572 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13573 | if (attr) |
13574 | { | |
ac9ec31b | 13575 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13576 | |
ac9ec31b | 13577 | /* The type's CU may not be the same as CU. |
02142a6c | 13578 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13579 | return set_die_type (die, type, cu); |
13580 | } | |
13581 | ||
c906108c SS |
13582 | type = alloc_type (objfile); |
13583 | ||
13584 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 13585 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 13586 | if (name != NULL) |
7d455152 | 13587 | TYPE_TAG_NAME (type) = name; |
c906108c | 13588 | |
0626fc76 TT |
13589 | attr = dwarf2_attr (die, DW_AT_type, cu); |
13590 | if (attr != NULL) | |
13591 | { | |
13592 | struct type *underlying_type = die_type (die, cu); | |
13593 | ||
13594 | TYPE_TARGET_TYPE (type) = underlying_type; | |
13595 | } | |
13596 | ||
e142c38c | 13597 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13598 | if (attr) |
13599 | { | |
13600 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13601 | } | |
13602 | else | |
13603 | { | |
13604 | TYPE_LENGTH (type) = 0; | |
13605 | } | |
13606 | ||
137033e9 JB |
13607 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
13608 | declared as private in the package spec, and then defined only | |
13609 | inside the package body. Such types are known as Taft Amendment | |
13610 | Types. When another package uses such a type, an incomplete DIE | |
13611 | may be generated by the compiler. */ | |
02eb380e | 13612 | if (die_is_declaration (die, cu)) |
876cecd0 | 13613 | TYPE_STUB (type) = 1; |
02eb380e | 13614 | |
0626fc76 TT |
13615 | /* Finish the creation of this type by using the enum's children. |
13616 | We must call this even when the underlying type has been provided | |
13617 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
13618 | update_enumeration_type_from_children (die, type, cu); |
13619 | ||
0626fc76 TT |
13620 | /* If this type has an underlying type that is not a stub, then we |
13621 | may use its attributes. We always use the "unsigned" attribute | |
13622 | in this situation, because ordinarily we guess whether the type | |
13623 | is unsigned -- but the guess can be wrong and the underlying type | |
13624 | can tell us the reality. However, we defer to a local size | |
13625 | attribute if one exists, because this lets the compiler override | |
13626 | the underlying type if needed. */ | |
13627 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
13628 | { | |
13629 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
13630 | if (TYPE_LENGTH (type) == 0) | |
13631 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
13632 | } | |
13633 | ||
3d567982 TT |
13634 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
13635 | ||
f792889a | 13636 | return set_die_type (die, type, cu); |
134d01f1 DJ |
13637 | } |
13638 | ||
13639 | /* Given a pointer to a die which begins an enumeration, process all | |
13640 | the dies that define the members of the enumeration, and create the | |
13641 | symbol for the enumeration type. | |
13642 | ||
13643 | NOTE: We reverse the order of the element list. */ | |
13644 | ||
13645 | static void | |
13646 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13647 | { | |
f792889a | 13648 | struct type *this_type; |
134d01f1 | 13649 | |
f792889a DJ |
13650 | this_type = get_die_type (die, cu); |
13651 | if (this_type == NULL) | |
13652 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 13653 | |
639d11d3 | 13654 | if (die->child != NULL) |
c906108c | 13655 | { |
9dc481d3 DE |
13656 | struct die_info *child_die; |
13657 | struct symbol *sym; | |
13658 | struct field *fields = NULL; | |
13659 | int num_fields = 0; | |
15d034d0 | 13660 | const char *name; |
9dc481d3 | 13661 | |
639d11d3 | 13662 | child_die = die->child; |
c906108c SS |
13663 | while (child_die && child_die->tag) |
13664 | { | |
13665 | if (child_die->tag != DW_TAG_enumerator) | |
13666 | { | |
e7c27a73 | 13667 | process_die (child_die, cu); |
c906108c SS |
13668 | } |
13669 | else | |
13670 | { | |
39cbfefa DJ |
13671 | name = dwarf2_name (child_die, cu); |
13672 | if (name) | |
c906108c | 13673 | { |
f792889a | 13674 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
13675 | |
13676 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13677 | { | |
13678 | fields = (struct field *) | |
13679 | xrealloc (fields, | |
13680 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13681 | * sizeof (struct field)); |
c906108c SS |
13682 | } |
13683 | ||
3567439c | 13684 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 13685 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 13686 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
13687 | FIELD_BITSIZE (fields[num_fields]) = 0; |
13688 | ||
13689 | num_fields++; | |
13690 | } | |
13691 | } | |
13692 | ||
13693 | child_die = sibling_die (child_die); | |
13694 | } | |
13695 | ||
13696 | if (num_fields) | |
13697 | { | |
f792889a DJ |
13698 | TYPE_NFIELDS (this_type) = num_fields; |
13699 | TYPE_FIELDS (this_type) = (struct field *) | |
13700 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
13701 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 13702 | sizeof (struct field) * num_fields); |
b8c9b27d | 13703 | xfree (fields); |
c906108c | 13704 | } |
c906108c | 13705 | } |
134d01f1 | 13706 | |
6c83ed52 TT |
13707 | /* If we are reading an enum from a .debug_types unit, and the enum |
13708 | is a declaration, and the enum is not the signatured type in the | |
13709 | unit, then we do not want to add a symbol for it. Adding a | |
13710 | symbol would in some cases obscure the true definition of the | |
13711 | enum, giving users an incomplete type when the definition is | |
13712 | actually available. Note that we do not want to do this for all | |
13713 | enums which are just declarations, because C++0x allows forward | |
13714 | enum declarations. */ | |
3019eac3 | 13715 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
13716 | && die_is_declaration (die, cu)) |
13717 | { | |
52dc124a | 13718 | struct signatured_type *sig_type; |
6c83ed52 | 13719 | |
c0f78cd4 | 13720 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
13721 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
13722 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
13723 | return; |
13724 | } | |
13725 | ||
f792889a | 13726 | new_symbol (die, this_type, cu); |
c906108c SS |
13727 | } |
13728 | ||
13729 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
13730 | the DIE's type field. For now, this only handles one dimensional | |
13731 | arrays. */ | |
13732 | ||
f792889a | 13733 | static struct type * |
e7c27a73 | 13734 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13735 | { |
e7c27a73 | 13736 | struct objfile *objfile = cu->objfile; |
c906108c | 13737 | struct die_info *child_die; |
7e314c57 | 13738 | struct type *type; |
c906108c SS |
13739 | struct type *element_type, *range_type, *index_type; |
13740 | struct type **range_types = NULL; | |
13741 | struct attribute *attr; | |
13742 | int ndim = 0; | |
13743 | struct cleanup *back_to; | |
15d034d0 | 13744 | const char *name; |
dc53a7ad | 13745 | unsigned int bit_stride = 0; |
c906108c | 13746 | |
e7c27a73 | 13747 | element_type = die_type (die, cu); |
c906108c | 13748 | |
7e314c57 JK |
13749 | /* The die_type call above may have already set the type for this DIE. */ |
13750 | type = get_die_type (die, cu); | |
13751 | if (type) | |
13752 | return type; | |
13753 | ||
dc53a7ad JB |
13754 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
13755 | if (attr != NULL) | |
13756 | bit_stride = DW_UNSND (attr) * 8; | |
13757 | ||
13758 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
13759 | if (attr != NULL) | |
13760 | bit_stride = DW_UNSND (attr); | |
13761 | ||
c906108c SS |
13762 | /* Irix 6.2 native cc creates array types without children for |
13763 | arrays with unspecified length. */ | |
639d11d3 | 13764 | if (die->child == NULL) |
c906108c | 13765 | { |
46bf5051 | 13766 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 13767 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
13768 | type = create_array_type_with_stride (NULL, element_type, range_type, |
13769 | bit_stride); | |
f792889a | 13770 | return set_die_type (die, type, cu); |
c906108c SS |
13771 | } |
13772 | ||
13773 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 13774 | child_die = die->child; |
c906108c SS |
13775 | while (child_die && child_die->tag) |
13776 | { | |
13777 | if (child_die->tag == DW_TAG_subrange_type) | |
13778 | { | |
f792889a | 13779 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 13780 | |
f792889a | 13781 | if (child_type != NULL) |
a02abb62 | 13782 | { |
0963b4bd MS |
13783 | /* The range type was succesfully read. Save it for the |
13784 | array type creation. */ | |
a02abb62 JB |
13785 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
13786 | { | |
13787 | range_types = (struct type **) | |
13788 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
13789 | * sizeof (struct type *)); | |
13790 | if (ndim == 0) | |
13791 | make_cleanup (free_current_contents, &range_types); | |
13792 | } | |
f792889a | 13793 | range_types[ndim++] = child_type; |
a02abb62 | 13794 | } |
c906108c SS |
13795 | } |
13796 | child_die = sibling_die (child_die); | |
13797 | } | |
13798 | ||
13799 | /* Dwarf2 dimensions are output from left to right, create the | |
13800 | necessary array types in backwards order. */ | |
7ca2d3a3 | 13801 | |
c906108c | 13802 | type = element_type; |
7ca2d3a3 DL |
13803 | |
13804 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
13805 | { | |
13806 | int i = 0; | |
9a619af0 | 13807 | |
7ca2d3a3 | 13808 | while (i < ndim) |
dc53a7ad JB |
13809 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
13810 | bit_stride); | |
7ca2d3a3 DL |
13811 | } |
13812 | else | |
13813 | { | |
13814 | while (ndim-- > 0) | |
dc53a7ad JB |
13815 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
13816 | bit_stride); | |
7ca2d3a3 | 13817 | } |
c906108c | 13818 | |
f5f8a009 EZ |
13819 | /* Understand Dwarf2 support for vector types (like they occur on |
13820 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
13821 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
13822 | custom vendor extension. The main difference between a regular | |
13823 | array and the vector variant is that vectors are passed by value | |
13824 | to functions. */ | |
e142c38c | 13825 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 13826 | if (attr) |
ea37ba09 | 13827 | make_vector_type (type); |
f5f8a009 | 13828 | |
dbc98a8b KW |
13829 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
13830 | implementation may choose to implement triple vectors using this | |
13831 | attribute. */ | |
13832 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
13833 | if (attr) | |
13834 | { | |
13835 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
13836 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13837 | else | |
3e43a32a MS |
13838 | complaint (&symfile_complaints, |
13839 | _("DW_AT_byte_size for array type smaller " | |
13840 | "than the total size of elements")); | |
dbc98a8b KW |
13841 | } |
13842 | ||
39cbfefa DJ |
13843 | name = dwarf2_name (die, cu); |
13844 | if (name) | |
13845 | TYPE_NAME (type) = name; | |
6e70227d | 13846 | |
0963b4bd | 13847 | /* Install the type in the die. */ |
7e314c57 JK |
13848 | set_die_type (die, type, cu); |
13849 | ||
13850 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13851 | set_descriptive_type (type, die, cu); |
13852 | ||
c906108c SS |
13853 | do_cleanups (back_to); |
13854 | ||
7e314c57 | 13855 | return type; |
c906108c SS |
13856 | } |
13857 | ||
7ca2d3a3 | 13858 | static enum dwarf_array_dim_ordering |
6e70227d | 13859 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
13860 | { |
13861 | struct attribute *attr; | |
13862 | ||
13863 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
13864 | ||
aead7601 SM |
13865 | if (attr) |
13866 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 13867 | |
0963b4bd MS |
13868 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
13869 | opposite order to the dwarf2 specification, but data is still | |
13870 | laid out as per normal fortran. | |
7ca2d3a3 | 13871 | |
0963b4bd MS |
13872 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
13873 | version checking. */ | |
7ca2d3a3 | 13874 | |
905e0470 PM |
13875 | if (cu->language == language_fortran |
13876 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
13877 | { |
13878 | return DW_ORD_row_major; | |
13879 | } | |
13880 | ||
6e70227d | 13881 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
13882 | { |
13883 | case array_column_major: | |
13884 | return DW_ORD_col_major; | |
13885 | case array_row_major: | |
13886 | default: | |
13887 | return DW_ORD_row_major; | |
13888 | }; | |
13889 | } | |
13890 | ||
72019c9c | 13891 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 13892 | the DIE's type field. */ |
72019c9c | 13893 | |
f792889a | 13894 | static struct type * |
72019c9c GM |
13895 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
13896 | { | |
7e314c57 JK |
13897 | struct type *domain_type, *set_type; |
13898 | struct attribute *attr; | |
f792889a | 13899 | |
7e314c57 JK |
13900 | domain_type = die_type (die, cu); |
13901 | ||
13902 | /* The die_type call above may have already set the type for this DIE. */ | |
13903 | set_type = get_die_type (die, cu); | |
13904 | if (set_type) | |
13905 | return set_type; | |
13906 | ||
13907 | set_type = create_set_type (NULL, domain_type); | |
13908 | ||
13909 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
13910 | if (attr) |
13911 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 13912 | |
f792889a | 13913 | return set_die_type (die, set_type, cu); |
72019c9c | 13914 | } |
7ca2d3a3 | 13915 | |
0971de02 TT |
13916 | /* A helper for read_common_block that creates a locexpr baton. |
13917 | SYM is the symbol which we are marking as computed. | |
13918 | COMMON_DIE is the DIE for the common block. | |
13919 | COMMON_LOC is the location expression attribute for the common | |
13920 | block itself. | |
13921 | MEMBER_LOC is the location expression attribute for the particular | |
13922 | member of the common block that we are processing. | |
13923 | CU is the CU from which the above come. */ | |
13924 | ||
13925 | static void | |
13926 | mark_common_block_symbol_computed (struct symbol *sym, | |
13927 | struct die_info *common_die, | |
13928 | struct attribute *common_loc, | |
13929 | struct attribute *member_loc, | |
13930 | struct dwarf2_cu *cu) | |
13931 | { | |
13932 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13933 | struct dwarf2_locexpr_baton *baton; | |
13934 | gdb_byte *ptr; | |
13935 | unsigned int cu_off; | |
13936 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
13937 | LONGEST offset = 0; | |
13938 | ||
13939 | gdb_assert (common_loc && member_loc); | |
13940 | gdb_assert (attr_form_is_block (common_loc)); | |
13941 | gdb_assert (attr_form_is_block (member_loc) | |
13942 | || attr_form_is_constant (member_loc)); | |
13943 | ||
8d749320 | 13944 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
13945 | baton->per_cu = cu->per_cu; |
13946 | gdb_assert (baton->per_cu); | |
13947 | ||
13948 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
13949 | ||
13950 | if (attr_form_is_constant (member_loc)) | |
13951 | { | |
13952 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
13953 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
13954 | } | |
13955 | else | |
13956 | baton->size += DW_BLOCK (member_loc)->size; | |
13957 | ||
224c3ddb | 13958 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
13959 | baton->data = ptr; |
13960 | ||
13961 | *ptr++ = DW_OP_call4; | |
13962 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
13963 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
13964 | ptr += 4; | |
13965 | ||
13966 | if (attr_form_is_constant (member_loc)) | |
13967 | { | |
13968 | *ptr++ = DW_OP_addr; | |
13969 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
13970 | ptr += cu->header.addr_size; | |
13971 | } | |
13972 | else | |
13973 | { | |
13974 | /* We have to copy the data here, because DW_OP_call4 will only | |
13975 | use a DW_AT_location attribute. */ | |
13976 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
13977 | ptr += DW_BLOCK (member_loc)->size; | |
13978 | } | |
13979 | ||
13980 | *ptr++ = DW_OP_plus; | |
13981 | gdb_assert (ptr - baton->data == baton->size); | |
13982 | ||
0971de02 | 13983 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 13984 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
13985 | } |
13986 | ||
4357ac6c TT |
13987 | /* Create appropriate locally-scoped variables for all the |
13988 | DW_TAG_common_block entries. Also create a struct common_block | |
13989 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
13990 | is used to sepate the common blocks name namespace from regular | |
13991 | variable names. */ | |
c906108c SS |
13992 | |
13993 | static void | |
e7c27a73 | 13994 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13995 | { |
0971de02 TT |
13996 | struct attribute *attr; |
13997 | ||
13998 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
13999 | if (attr) | |
14000 | { | |
14001 | /* Support the .debug_loc offsets. */ | |
14002 | if (attr_form_is_block (attr)) | |
14003 | { | |
14004 | /* Ok. */ | |
14005 | } | |
14006 | else if (attr_form_is_section_offset (attr)) | |
14007 | { | |
14008 | dwarf2_complex_location_expr_complaint (); | |
14009 | attr = NULL; | |
14010 | } | |
14011 | else | |
14012 | { | |
14013 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14014 | "common block member"); | |
14015 | attr = NULL; | |
14016 | } | |
14017 | } | |
14018 | ||
639d11d3 | 14019 | if (die->child != NULL) |
c906108c | 14020 | { |
4357ac6c TT |
14021 | struct objfile *objfile = cu->objfile; |
14022 | struct die_info *child_die; | |
14023 | size_t n_entries = 0, size; | |
14024 | struct common_block *common_block; | |
14025 | struct symbol *sym; | |
74ac6d43 | 14026 | |
4357ac6c TT |
14027 | for (child_die = die->child; |
14028 | child_die && child_die->tag; | |
14029 | child_die = sibling_die (child_die)) | |
14030 | ++n_entries; | |
14031 | ||
14032 | size = (sizeof (struct common_block) | |
14033 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
14034 | common_block |
14035 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
14036 | size); | |
4357ac6c TT |
14037 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
14038 | common_block->n_entries = 0; | |
14039 | ||
14040 | for (child_die = die->child; | |
14041 | child_die && child_die->tag; | |
14042 | child_die = sibling_die (child_die)) | |
14043 | { | |
14044 | /* Create the symbol in the DW_TAG_common_block block in the current | |
14045 | symbol scope. */ | |
e7c27a73 | 14046 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
14047 | if (sym != NULL) |
14048 | { | |
14049 | struct attribute *member_loc; | |
14050 | ||
14051 | common_block->contents[common_block->n_entries++] = sym; | |
14052 | ||
14053 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
14054 | cu); | |
14055 | if (member_loc) | |
14056 | { | |
14057 | /* GDB has handled this for a long time, but it is | |
14058 | not specified by DWARF. It seems to have been | |
14059 | emitted by gfortran at least as recently as: | |
14060 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
14061 | complaint (&symfile_complaints, | |
14062 | _("Variable in common block has " | |
14063 | "DW_AT_data_member_location " | |
14064 | "- DIE at 0x%x [in module %s]"), | |
4262abfb JK |
14065 | child_die->offset.sect_off, |
14066 | objfile_name (cu->objfile)); | |
0971de02 TT |
14067 | |
14068 | if (attr_form_is_section_offset (member_loc)) | |
14069 | dwarf2_complex_location_expr_complaint (); | |
14070 | else if (attr_form_is_constant (member_loc) | |
14071 | || attr_form_is_block (member_loc)) | |
14072 | { | |
14073 | if (attr) | |
14074 | mark_common_block_symbol_computed (sym, die, attr, | |
14075 | member_loc, cu); | |
14076 | } | |
14077 | else | |
14078 | dwarf2_complex_location_expr_complaint (); | |
14079 | } | |
14080 | } | |
c906108c | 14081 | } |
4357ac6c TT |
14082 | |
14083 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
14084 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
14085 | } |
14086 | } | |
14087 | ||
0114d602 | 14088 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 14089 | |
0114d602 DJ |
14090 | static struct type * |
14091 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 14092 | { |
e7c27a73 | 14093 | struct objfile *objfile = cu->objfile; |
0114d602 | 14094 | const char *previous_prefix, *name; |
9219021c | 14095 | int is_anonymous; |
0114d602 DJ |
14096 | struct type *type; |
14097 | ||
14098 | /* For extensions, reuse the type of the original namespace. */ | |
14099 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
14100 | { | |
14101 | struct die_info *ext_die; | |
14102 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 14103 | |
0114d602 DJ |
14104 | ext_die = dwarf2_extension (die, &ext_cu); |
14105 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
14106 | |
14107 | /* EXT_CU may not be the same as CU. | |
02142a6c | 14108 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
14109 | return set_die_type (die, type, cu); |
14110 | } | |
9219021c | 14111 | |
e142c38c | 14112 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
14113 | |
14114 | /* Now build the name of the current namespace. */ | |
14115 | ||
0114d602 DJ |
14116 | previous_prefix = determine_prefix (die, cu); |
14117 | if (previous_prefix[0] != '\0') | |
14118 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 14119 | previous_prefix, name, 0, cu); |
0114d602 DJ |
14120 | |
14121 | /* Create the type. */ | |
19f392bc | 14122 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
14123 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
14124 | ||
60531b24 | 14125 | return set_die_type (die, type, cu); |
0114d602 DJ |
14126 | } |
14127 | ||
22cee43f | 14128 | /* Read a namespace scope. */ |
0114d602 DJ |
14129 | |
14130 | static void | |
14131 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
14132 | { | |
14133 | struct objfile *objfile = cu->objfile; | |
0114d602 | 14134 | int is_anonymous; |
9219021c | 14135 | |
5c4e30ca DC |
14136 | /* Add a symbol associated to this if we haven't seen the namespace |
14137 | before. Also, add a using directive if it's an anonymous | |
14138 | namespace. */ | |
9219021c | 14139 | |
f2f0e013 | 14140 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
14141 | { |
14142 | struct type *type; | |
14143 | ||
0114d602 | 14144 | type = read_type_die (die, cu); |
e7c27a73 | 14145 | new_symbol (die, type, cu); |
5c4e30ca | 14146 | |
e8e80198 | 14147 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 14148 | if (is_anonymous) |
0114d602 DJ |
14149 | { |
14150 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 14151 | |
22cee43f PMR |
14152 | add_using_directive (using_directives (cu->language), |
14153 | previous_prefix, TYPE_NAME (type), NULL, | |
14154 | NULL, NULL, 0, &objfile->objfile_obstack); | |
0114d602 | 14155 | } |
5c4e30ca | 14156 | } |
9219021c | 14157 | |
639d11d3 | 14158 | if (die->child != NULL) |
d9fa45fe | 14159 | { |
639d11d3 | 14160 | struct die_info *child_die = die->child; |
6e70227d | 14161 | |
d9fa45fe DC |
14162 | while (child_die && child_die->tag) |
14163 | { | |
e7c27a73 | 14164 | process_die (child_die, cu); |
d9fa45fe DC |
14165 | child_die = sibling_die (child_die); |
14166 | } | |
14167 | } | |
38d518c9 EZ |
14168 | } |
14169 | ||
f55ee35c JK |
14170 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
14171 | imported module. Still we need that type as local Fortran "use ... only" | |
14172 | declaration imports depend on the created type in determine_prefix. */ | |
14173 | ||
14174 | static struct type * | |
14175 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
14176 | { | |
14177 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 14178 | const char *module_name; |
f55ee35c JK |
14179 | struct type *type; |
14180 | ||
14181 | module_name = dwarf2_name (die, cu); | |
14182 | if (!module_name) | |
3e43a32a MS |
14183 | complaint (&symfile_complaints, |
14184 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 14185 | die->offset.sect_off); |
19f392bc | 14186 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
14187 | |
14188 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
14189 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
14190 | ||
14191 | return set_die_type (die, type, cu); | |
14192 | } | |
14193 | ||
5d7cb8df JK |
14194 | /* Read a Fortran module. */ |
14195 | ||
14196 | static void | |
14197 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
14198 | { | |
14199 | struct die_info *child_die = die->child; | |
530e8392 KB |
14200 | struct type *type; |
14201 | ||
14202 | type = read_type_die (die, cu); | |
14203 | new_symbol (die, type, cu); | |
5d7cb8df | 14204 | |
5d7cb8df JK |
14205 | while (child_die && child_die->tag) |
14206 | { | |
14207 | process_die (child_die, cu); | |
14208 | child_die = sibling_die (child_die); | |
14209 | } | |
14210 | } | |
14211 | ||
38d518c9 EZ |
14212 | /* Return the name of the namespace represented by DIE. Set |
14213 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
14214 | namespace. */ | |
14215 | ||
14216 | static const char * | |
e142c38c | 14217 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
14218 | { |
14219 | struct die_info *current_die; | |
14220 | const char *name = NULL; | |
14221 | ||
14222 | /* Loop through the extensions until we find a name. */ | |
14223 | ||
14224 | for (current_die = die; | |
14225 | current_die != NULL; | |
f2f0e013 | 14226 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 14227 | { |
96553a0c DE |
14228 | /* We don't use dwarf2_name here so that we can detect the absence |
14229 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 14230 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 14231 | |
38d518c9 EZ |
14232 | if (name != NULL) |
14233 | break; | |
14234 | } | |
14235 | ||
14236 | /* Is it an anonymous namespace? */ | |
14237 | ||
14238 | *is_anonymous = (name == NULL); | |
14239 | if (*is_anonymous) | |
2b1dbab0 | 14240 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
14241 | |
14242 | return name; | |
d9fa45fe DC |
14243 | } |
14244 | ||
c906108c SS |
14245 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
14246 | the user defined type vector. */ | |
14247 | ||
f792889a | 14248 | static struct type * |
e7c27a73 | 14249 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14250 | { |
5e2b427d | 14251 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 14252 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 14253 | struct type *type; |
8b2dbe47 KB |
14254 | struct attribute *attr_byte_size; |
14255 | struct attribute *attr_address_class; | |
14256 | int byte_size, addr_class; | |
7e314c57 JK |
14257 | struct type *target_type; |
14258 | ||
14259 | target_type = die_type (die, cu); | |
c906108c | 14260 | |
7e314c57 JK |
14261 | /* The die_type call above may have already set the type for this DIE. */ |
14262 | type = get_die_type (die, cu); | |
14263 | if (type) | |
14264 | return type; | |
14265 | ||
14266 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 14267 | |
e142c38c | 14268 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
14269 | if (attr_byte_size) |
14270 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 14271 | else |
8b2dbe47 KB |
14272 | byte_size = cu_header->addr_size; |
14273 | ||
e142c38c | 14274 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14275 | if (attr_address_class) |
14276 | addr_class = DW_UNSND (attr_address_class); | |
14277 | else | |
14278 | addr_class = DW_ADDR_none; | |
14279 | ||
14280 | /* If the pointer size or address class is different than the | |
14281 | default, create a type variant marked as such and set the | |
14282 | length accordingly. */ | |
14283 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14284 | { |
5e2b427d | 14285 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14286 | { |
14287 | int type_flags; | |
14288 | ||
849957d9 | 14289 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14290 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14291 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14292 | == 0); | |
8b2dbe47 KB |
14293 | type = make_type_with_address_space (type, type_flags); |
14294 | } | |
14295 | else if (TYPE_LENGTH (type) != byte_size) | |
14296 | { | |
3e43a32a MS |
14297 | complaint (&symfile_complaints, |
14298 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14299 | } |
6e70227d | 14300 | else |
9a619af0 MS |
14301 | { |
14302 | /* Should we also complain about unhandled address classes? */ | |
14303 | } | |
c906108c | 14304 | } |
8b2dbe47 KB |
14305 | |
14306 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14307 | return set_die_type (die, type, cu); |
c906108c SS |
14308 | } |
14309 | ||
14310 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14311 | the user defined type vector. */ | |
14312 | ||
f792889a | 14313 | static struct type * |
e7c27a73 | 14314 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14315 | { |
14316 | struct type *type; | |
14317 | struct type *to_type; | |
14318 | struct type *domain; | |
14319 | ||
e7c27a73 DJ |
14320 | to_type = die_type (die, cu); |
14321 | domain = die_containing_type (die, cu); | |
0d5de010 | 14322 | |
7e314c57 JK |
14323 | /* The calls above may have already set the type for this DIE. */ |
14324 | type = get_die_type (die, cu); | |
14325 | if (type) | |
14326 | return type; | |
14327 | ||
0d5de010 DJ |
14328 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14329 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14330 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14331 | { | |
14332 | struct type *new_type = alloc_type (cu->objfile); | |
14333 | ||
14334 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14335 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14336 | TYPE_VARARGS (to_type)); | |
14337 | type = lookup_methodptr_type (new_type); | |
14338 | } | |
0d5de010 DJ |
14339 | else |
14340 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14341 | |
f792889a | 14342 | return set_die_type (die, type, cu); |
c906108c SS |
14343 | } |
14344 | ||
14345 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
14346 | the user defined type vector. */ | |
14347 | ||
f792889a | 14348 | static struct type * |
e7c27a73 | 14349 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14350 | { |
e7c27a73 | 14351 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14352 | struct type *type, *target_type; |
c906108c SS |
14353 | struct attribute *attr; |
14354 | ||
7e314c57 JK |
14355 | target_type = die_type (die, cu); |
14356 | ||
14357 | /* The die_type call above may have already set the type for this DIE. */ | |
14358 | type = get_die_type (die, cu); | |
14359 | if (type) | |
14360 | return type; | |
14361 | ||
14362 | type = lookup_reference_type (target_type); | |
e142c38c | 14363 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14364 | if (attr) |
14365 | { | |
14366 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14367 | } | |
14368 | else | |
14369 | { | |
107d2387 | 14370 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14371 | } |
f792889a | 14372 | return set_die_type (die, type, cu); |
c906108c SS |
14373 | } |
14374 | ||
cf363f18 MW |
14375 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14376 | outputs DWARF type qualifiers that apply to an array, not the | |
14377 | element type. But GDB relies on the array element type to carry | |
14378 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14379 | specification. */ | |
14380 | ||
14381 | static struct type * | |
14382 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14383 | struct type *base_type, int cnst, int voltl) | |
14384 | { | |
14385 | struct type *el_type, *inner_array; | |
14386 | ||
14387 | base_type = copy_type (base_type); | |
14388 | inner_array = base_type; | |
14389 | ||
14390 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14391 | { | |
14392 | TYPE_TARGET_TYPE (inner_array) = | |
14393 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14394 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14395 | } | |
14396 | ||
14397 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14398 | cnst |= TYPE_CONST (el_type); | |
14399 | voltl |= TYPE_VOLATILE (el_type); | |
14400 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14401 | ||
14402 | return set_die_type (die, base_type, cu); | |
14403 | } | |
14404 | ||
f792889a | 14405 | static struct type * |
e7c27a73 | 14406 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14407 | { |
f792889a | 14408 | struct type *base_type, *cv_type; |
c906108c | 14409 | |
e7c27a73 | 14410 | base_type = die_type (die, cu); |
7e314c57 JK |
14411 | |
14412 | /* The die_type call above may have already set the type for this DIE. */ | |
14413 | cv_type = get_die_type (die, cu); | |
14414 | if (cv_type) | |
14415 | return cv_type; | |
14416 | ||
2f608a3a KW |
14417 | /* In case the const qualifier is applied to an array type, the element type |
14418 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14419 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14420 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14421 | |
f792889a DJ |
14422 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14423 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14424 | } |
14425 | ||
f792889a | 14426 | static struct type * |
e7c27a73 | 14427 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14428 | { |
f792889a | 14429 | struct type *base_type, *cv_type; |
c906108c | 14430 | |
e7c27a73 | 14431 | base_type = die_type (die, cu); |
7e314c57 JK |
14432 | |
14433 | /* The die_type call above may have already set the type for this DIE. */ | |
14434 | cv_type = get_die_type (die, cu); | |
14435 | if (cv_type) | |
14436 | return cv_type; | |
14437 | ||
cf363f18 MW |
14438 | /* In case the volatile qualifier is applied to an array type, the |
14439 | element type is so qualified, not the array type (section 6.7.3 | |
14440 | of C99). */ | |
14441 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14442 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14443 | ||
f792889a DJ |
14444 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14445 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14446 | } |
14447 | ||
06d66ee9 TT |
14448 | /* Handle DW_TAG_restrict_type. */ |
14449 | ||
14450 | static struct type * | |
14451 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14452 | { | |
14453 | struct type *base_type, *cv_type; | |
14454 | ||
14455 | base_type = die_type (die, cu); | |
14456 | ||
14457 | /* The die_type call above may have already set the type for this DIE. */ | |
14458 | cv_type = get_die_type (die, cu); | |
14459 | if (cv_type) | |
14460 | return cv_type; | |
14461 | ||
14462 | cv_type = make_restrict_type (base_type); | |
14463 | return set_die_type (die, cv_type, cu); | |
14464 | } | |
14465 | ||
a2c2acaf MW |
14466 | /* Handle DW_TAG_atomic_type. */ |
14467 | ||
14468 | static struct type * | |
14469 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
14470 | { | |
14471 | struct type *base_type, *cv_type; | |
14472 | ||
14473 | base_type = die_type (die, cu); | |
14474 | ||
14475 | /* The die_type call above may have already set the type for this DIE. */ | |
14476 | cv_type = get_die_type (die, cu); | |
14477 | if (cv_type) | |
14478 | return cv_type; | |
14479 | ||
14480 | cv_type = make_atomic_type (base_type); | |
14481 | return set_die_type (die, cv_type, cu); | |
14482 | } | |
14483 | ||
c906108c SS |
14484 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14485 | the user defined type vector. It isn't really a user defined type, | |
14486 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14487 | attribute to reference it. */ | |
14488 | ||
f792889a | 14489 | static struct type * |
e7c27a73 | 14490 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14491 | { |
e7c27a73 | 14492 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14493 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14494 | struct type *type, *range_type, *index_type, *char_type; |
14495 | struct attribute *attr; | |
14496 | unsigned int length; | |
14497 | ||
e142c38c | 14498 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14499 | if (attr) |
14500 | { | |
14501 | length = DW_UNSND (attr); | |
14502 | } | |
14503 | else | |
14504 | { | |
0963b4bd | 14505 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14506 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14507 | if (attr) |
14508 | { | |
14509 | length = DW_UNSND (attr); | |
14510 | } | |
14511 | else | |
14512 | { | |
14513 | length = 1; | |
14514 | } | |
c906108c | 14515 | } |
6ccb9162 | 14516 | |
46bf5051 | 14517 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14518 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14519 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14520 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14521 | |
f792889a | 14522 | return set_die_type (die, type, cu); |
c906108c SS |
14523 | } |
14524 | ||
4d804846 JB |
14525 | /* Assuming that DIE corresponds to a function, returns nonzero |
14526 | if the function is prototyped. */ | |
14527 | ||
14528 | static int | |
14529 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14530 | { | |
14531 | struct attribute *attr; | |
14532 | ||
14533 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14534 | if (attr && (DW_UNSND (attr) != 0)) | |
14535 | return 1; | |
14536 | ||
14537 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14538 | is only meaninful for C, but the concept also extends to other | |
14539 | languages that allow unprototyped functions (Eg: Objective C). | |
14540 | For all other languages, assume that functions are always | |
14541 | prototyped. */ | |
14542 | if (cu->language != language_c | |
14543 | && cu->language != language_objc | |
14544 | && cu->language != language_opencl) | |
14545 | return 1; | |
14546 | ||
14547 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14548 | prototyped and unprototyped functions; default to prototyped, | |
14549 | since that is more common in modern code (and RealView warns | |
14550 | about unprototyped functions). */ | |
14551 | if (producer_is_realview (cu->producer)) | |
14552 | return 1; | |
14553 | ||
14554 | return 0; | |
14555 | } | |
14556 | ||
c906108c SS |
14557 | /* Handle DIES due to C code like: |
14558 | ||
14559 | struct foo | |
c5aa993b JM |
14560 | { |
14561 | int (*funcp)(int a, long l); | |
14562 | int b; | |
14563 | }; | |
c906108c | 14564 | |
0963b4bd | 14565 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14566 | |
f792889a | 14567 | static struct type * |
e7c27a73 | 14568 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14569 | { |
bb5ed363 | 14570 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14571 | struct type *type; /* Type that this function returns. */ |
14572 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14573 | struct attribute *attr; |
14574 | ||
e7c27a73 | 14575 | type = die_type (die, cu); |
7e314c57 JK |
14576 | |
14577 | /* The die_type call above may have already set the type for this DIE. */ | |
14578 | ftype = get_die_type (die, cu); | |
14579 | if (ftype) | |
14580 | return ftype; | |
14581 | ||
0c8b41f1 | 14582 | ftype = lookup_function_type (type); |
c906108c | 14583 | |
4d804846 | 14584 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 14585 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 14586 | |
c055b101 CV |
14587 | /* Store the calling convention in the type if it's available in |
14588 | the subroutine die. Otherwise set the calling convention to | |
14589 | the default value DW_CC_normal. */ | |
14590 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
14591 | if (attr) |
14592 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
14593 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
14594 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
14595 | else | |
14596 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 14597 | |
743649fd MW |
14598 | /* Record whether the function returns normally to its caller or not |
14599 | if the DWARF producer set that information. */ | |
14600 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
14601 | if (attr && (DW_UNSND (attr) != 0)) | |
14602 | TYPE_NO_RETURN (ftype) = 1; | |
14603 | ||
76c10ea2 GM |
14604 | /* We need to add the subroutine type to the die immediately so |
14605 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 14606 | declared as the same subroutine type. */ |
76c10ea2 | 14607 | set_die_type (die, ftype, cu); |
6e70227d | 14608 | |
639d11d3 | 14609 | if (die->child != NULL) |
c906108c | 14610 | { |
bb5ed363 | 14611 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 14612 | struct die_info *child_die; |
8072405b | 14613 | int nparams, iparams; |
c906108c SS |
14614 | |
14615 | /* Count the number of parameters. | |
14616 | FIXME: GDB currently ignores vararg functions, but knows about | |
14617 | vararg member functions. */ | |
8072405b | 14618 | nparams = 0; |
639d11d3 | 14619 | child_die = die->child; |
c906108c SS |
14620 | while (child_die && child_die->tag) |
14621 | { | |
14622 | if (child_die->tag == DW_TAG_formal_parameter) | |
14623 | nparams++; | |
14624 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 14625 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
14626 | child_die = sibling_die (child_die); |
14627 | } | |
14628 | ||
14629 | /* Allocate storage for parameters and fill them in. */ | |
14630 | TYPE_NFIELDS (ftype) = nparams; | |
14631 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 14632 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 14633 | |
8072405b JK |
14634 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
14635 | even if we error out during the parameters reading below. */ | |
14636 | for (iparams = 0; iparams < nparams; iparams++) | |
14637 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
14638 | ||
14639 | iparams = 0; | |
639d11d3 | 14640 | child_die = die->child; |
c906108c SS |
14641 | while (child_die && child_die->tag) |
14642 | { | |
14643 | if (child_die->tag == DW_TAG_formal_parameter) | |
14644 | { | |
3ce3b1ba PA |
14645 | struct type *arg_type; |
14646 | ||
14647 | /* DWARF version 2 has no clean way to discern C++ | |
14648 | static and non-static member functions. G++ helps | |
14649 | GDB by marking the first parameter for non-static | |
14650 | member functions (which is the this pointer) as | |
14651 | artificial. We pass this information to | |
14652 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
14653 | ||
14654 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
14655 | 4.5 does not yet generate. */ | |
e142c38c | 14656 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
14657 | if (attr) |
14658 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
14659 | else | |
9c37b5ae | 14660 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
14661 | arg_type = die_type (child_die, cu); |
14662 | ||
14663 | /* RealView does not mark THIS as const, which the testsuite | |
14664 | expects. GCC marks THIS as const in method definitions, | |
14665 | but not in the class specifications (GCC PR 43053). */ | |
14666 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
14667 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
14668 | { | |
14669 | int is_this = 0; | |
14670 | struct dwarf2_cu *arg_cu = cu; | |
14671 | const char *name = dwarf2_name (child_die, cu); | |
14672 | ||
14673 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
14674 | if (attr) | |
14675 | { | |
14676 | /* If the compiler emits this, use it. */ | |
14677 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
14678 | is_this = 1; | |
14679 | } | |
14680 | else if (name && strcmp (name, "this") == 0) | |
14681 | /* Function definitions will have the argument names. */ | |
14682 | is_this = 1; | |
14683 | else if (name == NULL && iparams == 0) | |
14684 | /* Declarations may not have the names, so like | |
14685 | elsewhere in GDB, assume an artificial first | |
14686 | argument is "this". */ | |
14687 | is_this = 1; | |
14688 | ||
14689 | if (is_this) | |
14690 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
14691 | arg_type, 0); | |
14692 | } | |
14693 | ||
14694 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
14695 | iparams++; |
14696 | } | |
14697 | child_die = sibling_die (child_die); | |
14698 | } | |
14699 | } | |
14700 | ||
76c10ea2 | 14701 | return ftype; |
c906108c SS |
14702 | } |
14703 | ||
f792889a | 14704 | static struct type * |
e7c27a73 | 14705 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14706 | { |
e7c27a73 | 14707 | struct objfile *objfile = cu->objfile; |
0114d602 | 14708 | const char *name = NULL; |
3c8e0968 | 14709 | struct type *this_type, *target_type; |
c906108c | 14710 | |
94af9270 | 14711 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
14712 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
14713 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 14714 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
14715 | target_type = die_type (die, cu); |
14716 | if (target_type != this_type) | |
14717 | TYPE_TARGET_TYPE (this_type) = target_type; | |
14718 | else | |
14719 | { | |
14720 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
14721 | spec and cause infinite loops in GDB. */ | |
14722 | complaint (&symfile_complaints, | |
14723 | _("Self-referential DW_TAG_typedef " | |
14724 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14725 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
14726 | TYPE_TARGET_TYPE (this_type) = NULL; |
14727 | } | |
f792889a | 14728 | return this_type; |
c906108c SS |
14729 | } |
14730 | ||
9b790ce7 UW |
14731 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
14732 | (which may be different from NAME) to the architecture back-end to allow | |
14733 | it to guess the correct format if necessary. */ | |
14734 | ||
14735 | static struct type * | |
14736 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
14737 | const char *name_hint) | |
14738 | { | |
14739 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
14740 | const struct floatformat **format; | |
14741 | struct type *type; | |
14742 | ||
14743 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
14744 | if (format) | |
14745 | type = init_float_type (objfile, bits, name, format); | |
14746 | else | |
14747 | type = init_type (objfile, TYPE_CODE_ERROR, bits / TARGET_CHAR_BIT, name); | |
14748 | ||
14749 | return type; | |
14750 | } | |
14751 | ||
c906108c SS |
14752 | /* Find a representation of a given base type and install |
14753 | it in the TYPE field of the die. */ | |
14754 | ||
f792889a | 14755 | static struct type * |
e7c27a73 | 14756 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14757 | { |
e7c27a73 | 14758 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14759 | struct type *type; |
14760 | struct attribute *attr; | |
19f392bc | 14761 | int encoding = 0, bits = 0; |
15d034d0 | 14762 | const char *name; |
c906108c | 14763 | |
e142c38c | 14764 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
14765 | if (attr) |
14766 | { | |
14767 | encoding = DW_UNSND (attr); | |
14768 | } | |
e142c38c | 14769 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14770 | if (attr) |
14771 | { | |
19f392bc | 14772 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 14773 | } |
39cbfefa | 14774 | name = dwarf2_name (die, cu); |
6ccb9162 | 14775 | if (!name) |
c906108c | 14776 | { |
6ccb9162 UW |
14777 | complaint (&symfile_complaints, |
14778 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 14779 | } |
6ccb9162 UW |
14780 | |
14781 | switch (encoding) | |
c906108c | 14782 | { |
6ccb9162 UW |
14783 | case DW_ATE_address: |
14784 | /* Turn DW_ATE_address into a void * pointer. */ | |
19f392bc UW |
14785 | type = init_type (objfile, TYPE_CODE_VOID, 1, NULL); |
14786 | type = init_pointer_type (objfile, bits, name, type); | |
6ccb9162 UW |
14787 | break; |
14788 | case DW_ATE_boolean: | |
19f392bc | 14789 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
14790 | break; |
14791 | case DW_ATE_complex_float: | |
9b790ce7 | 14792 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 14793 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
14794 | break; |
14795 | case DW_ATE_decimal_float: | |
19f392bc | 14796 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
14797 | break; |
14798 | case DW_ATE_float: | |
9b790ce7 | 14799 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
14800 | break; |
14801 | case DW_ATE_signed: | |
19f392bc | 14802 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
14803 | break; |
14804 | case DW_ATE_unsigned: | |
3b2b8fea TT |
14805 | if (cu->language == language_fortran |
14806 | && name | |
61012eef | 14807 | && startswith (name, "character(")) |
19f392bc UW |
14808 | type = init_character_type (objfile, bits, 1, name); |
14809 | else | |
14810 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
14811 | break; |
14812 | case DW_ATE_signed_char: | |
6e70227d | 14813 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14814 | || cu->language == language_pascal |
14815 | || cu->language == language_fortran) | |
19f392bc UW |
14816 | type = init_character_type (objfile, bits, 0, name); |
14817 | else | |
14818 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
14819 | break; |
14820 | case DW_ATE_unsigned_char: | |
868a0084 | 14821 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 14822 | || cu->language == language_pascal |
c44af4eb TT |
14823 | || cu->language == language_fortran |
14824 | || cu->language == language_rust) | |
19f392bc UW |
14825 | type = init_character_type (objfile, bits, 1, name); |
14826 | else | |
14827 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 14828 | break; |
75079b2b TT |
14829 | case DW_ATE_UTF: |
14830 | /* We just treat this as an integer and then recognize the | |
14831 | type by name elsewhere. */ | |
19f392bc | 14832 | type = init_integer_type (objfile, bits, 0, name); |
75079b2b TT |
14833 | break; |
14834 | ||
6ccb9162 UW |
14835 | default: |
14836 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
14837 | dwarf_type_encoding_name (encoding)); | |
19f392bc UW |
14838 | type = init_type (objfile, TYPE_CODE_ERROR, |
14839 | bits / TARGET_CHAR_BIT, name); | |
6ccb9162 | 14840 | break; |
c906108c | 14841 | } |
6ccb9162 | 14842 | |
0114d602 | 14843 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 14844 | TYPE_NOSIGN (type) = 1; |
0114d602 | 14845 | |
f792889a | 14846 | return set_die_type (die, type, cu); |
c906108c SS |
14847 | } |
14848 | ||
80180f79 SA |
14849 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
14850 | resulting value of the attribute into struct bound_prop. | |
14851 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
14852 | ||
14853 | static int | |
14854 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
14855 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
14856 | { | |
14857 | struct dwarf2_property_baton *baton; | |
14858 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
14859 | ||
14860 | if (attr == NULL || prop == NULL) | |
14861 | return 0; | |
14862 | ||
14863 | if (attr_form_is_block (attr)) | |
14864 | { | |
8d749320 | 14865 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
14866 | baton->referenced_type = NULL; |
14867 | baton->locexpr.per_cu = cu->per_cu; | |
14868 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
14869 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
14870 | prop->data.baton = baton; | |
14871 | prop->kind = PROP_LOCEXPR; | |
14872 | gdb_assert (prop->data.baton != NULL); | |
14873 | } | |
14874 | else if (attr_form_is_ref (attr)) | |
14875 | { | |
14876 | struct dwarf2_cu *target_cu = cu; | |
14877 | struct die_info *target_die; | |
14878 | struct attribute *target_attr; | |
14879 | ||
14880 | target_die = follow_die_ref (die, attr, &target_cu); | |
14881 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
14882 | if (target_attr == NULL) |
14883 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
14884 | target_cu); | |
80180f79 SA |
14885 | if (target_attr == NULL) |
14886 | return 0; | |
14887 | ||
df25ebbd | 14888 | switch (target_attr->name) |
80180f79 | 14889 | { |
df25ebbd JB |
14890 | case DW_AT_location: |
14891 | if (attr_form_is_section_offset (target_attr)) | |
14892 | { | |
8d749320 | 14893 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
14894 | baton->referenced_type = die_type (target_die, target_cu); |
14895 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
14896 | prop->data.baton = baton; | |
14897 | prop->kind = PROP_LOCLIST; | |
14898 | gdb_assert (prop->data.baton != NULL); | |
14899 | } | |
14900 | else if (attr_form_is_block (target_attr)) | |
14901 | { | |
8d749320 | 14902 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
14903 | baton->referenced_type = die_type (target_die, target_cu); |
14904 | baton->locexpr.per_cu = cu->per_cu; | |
14905 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
14906 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
14907 | prop->data.baton = baton; | |
14908 | prop->kind = PROP_LOCEXPR; | |
14909 | gdb_assert (prop->data.baton != NULL); | |
14910 | } | |
14911 | else | |
14912 | { | |
14913 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14914 | "dynamic property"); | |
14915 | return 0; | |
14916 | } | |
14917 | break; | |
14918 | case DW_AT_data_member_location: | |
14919 | { | |
14920 | LONGEST offset; | |
14921 | ||
14922 | if (!handle_data_member_location (target_die, target_cu, | |
14923 | &offset)) | |
14924 | return 0; | |
14925 | ||
8d749320 | 14926 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
14927 | baton->referenced_type = read_type_die (target_die->parent, |
14928 | target_cu); | |
df25ebbd JB |
14929 | baton->offset_info.offset = offset; |
14930 | baton->offset_info.type = die_type (target_die, target_cu); | |
14931 | prop->data.baton = baton; | |
14932 | prop->kind = PROP_ADDR_OFFSET; | |
14933 | break; | |
14934 | } | |
80180f79 SA |
14935 | } |
14936 | } | |
14937 | else if (attr_form_is_constant (attr)) | |
14938 | { | |
14939 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
14940 | prop->kind = PROP_CONST; | |
14941 | } | |
14942 | else | |
14943 | { | |
14944 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
14945 | dwarf2_name (die, cu)); | |
14946 | return 0; | |
14947 | } | |
14948 | ||
14949 | return 1; | |
14950 | } | |
14951 | ||
a02abb62 JB |
14952 | /* Read the given DW_AT_subrange DIE. */ |
14953 | ||
f792889a | 14954 | static struct type * |
a02abb62 JB |
14955 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
14956 | { | |
4c9ad8c2 | 14957 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
14958 | struct type *range_type; |
14959 | struct attribute *attr; | |
729efb13 | 14960 | struct dynamic_prop low, high; |
4fae6e18 | 14961 | int low_default_is_valid; |
c451ebe5 | 14962 | int high_bound_is_count = 0; |
15d034d0 | 14963 | const char *name; |
43bbcdc2 | 14964 | LONGEST negative_mask; |
e77813c8 | 14965 | |
4c9ad8c2 TT |
14966 | orig_base_type = die_type (die, cu); |
14967 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
14968 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
14969 | creating the range type, but we use the result of check_typedef | |
14970 | when examining properties of the type. */ | |
14971 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 14972 | |
7e314c57 JK |
14973 | /* The die_type call above may have already set the type for this DIE. */ |
14974 | range_type = get_die_type (die, cu); | |
14975 | if (range_type) | |
14976 | return range_type; | |
14977 | ||
729efb13 SA |
14978 | low.kind = PROP_CONST; |
14979 | high.kind = PROP_CONST; | |
14980 | high.data.const_val = 0; | |
14981 | ||
4fae6e18 JK |
14982 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
14983 | omitting DW_AT_lower_bound. */ | |
14984 | switch (cu->language) | |
6e70227d | 14985 | { |
4fae6e18 JK |
14986 | case language_c: |
14987 | case language_cplus: | |
729efb13 | 14988 | low.data.const_val = 0; |
4fae6e18 JK |
14989 | low_default_is_valid = 1; |
14990 | break; | |
14991 | case language_fortran: | |
729efb13 | 14992 | low.data.const_val = 1; |
4fae6e18 JK |
14993 | low_default_is_valid = 1; |
14994 | break; | |
14995 | case language_d: | |
4fae6e18 | 14996 | case language_objc: |
c44af4eb | 14997 | case language_rust: |
729efb13 | 14998 | low.data.const_val = 0; |
4fae6e18 JK |
14999 | low_default_is_valid = (cu->header.version >= 4); |
15000 | break; | |
15001 | case language_ada: | |
15002 | case language_m2: | |
15003 | case language_pascal: | |
729efb13 | 15004 | low.data.const_val = 1; |
4fae6e18 JK |
15005 | low_default_is_valid = (cu->header.version >= 4); |
15006 | break; | |
15007 | default: | |
729efb13 | 15008 | low.data.const_val = 0; |
4fae6e18 JK |
15009 | low_default_is_valid = 0; |
15010 | break; | |
a02abb62 JB |
15011 | } |
15012 | ||
e142c38c | 15013 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 15014 | if (attr) |
11c1ba78 | 15015 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
15016 | else if (!low_default_is_valid) |
15017 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
15018 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15019 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 15020 | |
e142c38c | 15021 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 15022 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
15023 | { |
15024 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 15025 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 15026 | { |
c451ebe5 SA |
15027 | /* If bounds are constant do the final calculation here. */ |
15028 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
15029 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
15030 | else | |
15031 | high_bound_is_count = 1; | |
c2ff108b | 15032 | } |
e77813c8 PM |
15033 | } |
15034 | ||
15035 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
15036 | without specifying a base type. | |
15037 | In that case, the base type must be set to the type of | |
15038 | the lower bound, upper bound or count, in that order, if any of these | |
15039 | three attributes references an object that has a type. | |
15040 | If no base type is found, the Dwarf-2 specifications say that | |
15041 | a signed integer type of size equal to the size of an address should | |
15042 | be used. | |
15043 | For the following C code: `extern char gdb_int [];' | |
15044 | GCC produces an empty range DIE. | |
15045 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 15046 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
15047 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
15048 | { | |
15049 | struct objfile *objfile = cu->objfile; | |
15050 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15051 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
15052 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
15053 | ||
15054 | /* Test "int", "long int", and "long long int" objfile types, | |
15055 | and select the first one having a size above or equal to the | |
15056 | architecture address size. */ | |
15057 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15058 | base_type = int_type; | |
15059 | else | |
15060 | { | |
15061 | int_type = objfile_type (objfile)->builtin_long; | |
15062 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15063 | base_type = int_type; | |
15064 | else | |
15065 | { | |
15066 | int_type = objfile_type (objfile)->builtin_long_long; | |
15067 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15068 | base_type = int_type; | |
15069 | } | |
15070 | } | |
15071 | } | |
a02abb62 | 15072 | |
dbb9c2b1 JB |
15073 | /* Normally, the DWARF producers are expected to use a signed |
15074 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
15075 | But this is unfortunately not always the case, as witnessed | |
15076 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
15077 | is used instead. To work around that ambiguity, we treat | |
15078 | the bounds as signed, and thus sign-extend their values, when | |
15079 | the base type is signed. */ | |
6e70227d | 15080 | negative_mask = |
66c6502d | 15081 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
15082 | if (low.kind == PROP_CONST |
15083 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
15084 | low.data.const_val |= negative_mask; | |
15085 | if (high.kind == PROP_CONST | |
15086 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
15087 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 15088 | |
729efb13 | 15089 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 15090 | |
c451ebe5 SA |
15091 | if (high_bound_is_count) |
15092 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
15093 | ||
c2ff108b JK |
15094 | /* Ada expects an empty array on no boundary attributes. */ |
15095 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 15096 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 15097 | |
39cbfefa DJ |
15098 | name = dwarf2_name (die, cu); |
15099 | if (name) | |
15100 | TYPE_NAME (range_type) = name; | |
6e70227d | 15101 | |
e142c38c | 15102 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
15103 | if (attr) |
15104 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
15105 | ||
7e314c57 JK |
15106 | set_die_type (die, range_type, cu); |
15107 | ||
15108 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15109 | set_descriptive_type (range_type, die, cu); |
15110 | ||
7e314c57 | 15111 | return range_type; |
a02abb62 | 15112 | } |
6e70227d | 15113 | |
f792889a | 15114 | static struct type * |
81a17f79 JB |
15115 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
15116 | { | |
15117 | struct type *type; | |
81a17f79 | 15118 | |
81a17f79 JB |
15119 | /* For now, we only support the C meaning of an unspecified type: void. */ |
15120 | ||
19f392bc | 15121 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 15122 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 15123 | |
f792889a | 15124 | return set_die_type (die, type, cu); |
81a17f79 | 15125 | } |
a02abb62 | 15126 | |
639d11d3 DC |
15127 | /* Read a single die and all its descendents. Set the die's sibling |
15128 | field to NULL; set other fields in the die correctly, and set all | |
15129 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
15130 | location of the info_ptr after reading all of those dies. PARENT | |
15131 | is the parent of the die in question. */ | |
15132 | ||
15133 | static struct die_info * | |
dee91e82 | 15134 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
15135 | const gdb_byte *info_ptr, |
15136 | const gdb_byte **new_info_ptr, | |
dee91e82 | 15137 | struct die_info *parent) |
639d11d3 DC |
15138 | { |
15139 | struct die_info *die; | |
d521ce57 | 15140 | const gdb_byte *cur_ptr; |
639d11d3 DC |
15141 | int has_children; |
15142 | ||
bf6af496 | 15143 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
15144 | if (die == NULL) |
15145 | { | |
15146 | *new_info_ptr = cur_ptr; | |
15147 | return NULL; | |
15148 | } | |
93311388 | 15149 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
15150 | |
15151 | if (has_children) | |
bf6af496 | 15152 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
15153 | else |
15154 | { | |
15155 | die->child = NULL; | |
15156 | *new_info_ptr = cur_ptr; | |
15157 | } | |
15158 | ||
15159 | die->sibling = NULL; | |
15160 | die->parent = parent; | |
15161 | return die; | |
15162 | } | |
15163 | ||
15164 | /* Read a die, all of its descendents, and all of its siblings; set | |
15165 | all of the fields of all of the dies correctly. Arguments are as | |
15166 | in read_die_and_children. */ | |
15167 | ||
15168 | static struct die_info * | |
bf6af496 | 15169 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
15170 | const gdb_byte *info_ptr, |
15171 | const gdb_byte **new_info_ptr, | |
bf6af496 | 15172 | struct die_info *parent) |
639d11d3 DC |
15173 | { |
15174 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 15175 | const gdb_byte *cur_ptr; |
639d11d3 | 15176 | |
c906108c | 15177 | cur_ptr = info_ptr; |
639d11d3 DC |
15178 | first_die = last_sibling = NULL; |
15179 | ||
15180 | while (1) | |
c906108c | 15181 | { |
639d11d3 | 15182 | struct die_info *die |
dee91e82 | 15183 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 15184 | |
1d325ec1 | 15185 | if (die == NULL) |
c906108c | 15186 | { |
639d11d3 DC |
15187 | *new_info_ptr = cur_ptr; |
15188 | return first_die; | |
c906108c | 15189 | } |
1d325ec1 DJ |
15190 | |
15191 | if (!first_die) | |
15192 | first_die = die; | |
c906108c | 15193 | else |
1d325ec1 DJ |
15194 | last_sibling->sibling = die; |
15195 | ||
15196 | last_sibling = die; | |
c906108c | 15197 | } |
c906108c SS |
15198 | } |
15199 | ||
bf6af496 DE |
15200 | /* Read a die, all of its descendents, and all of its siblings; set |
15201 | all of the fields of all of the dies correctly. Arguments are as | |
15202 | in read_die_and_children. | |
15203 | This the main entry point for reading a DIE and all its children. */ | |
15204 | ||
15205 | static struct die_info * | |
15206 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
15207 | const gdb_byte *info_ptr, |
15208 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
15209 | struct die_info *parent) |
15210 | { | |
15211 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
15212 | new_info_ptr, parent); | |
15213 | ||
b4f54984 | 15214 | if (dwarf_die_debug) |
bf6af496 DE |
15215 | { |
15216 | fprintf_unfiltered (gdb_stdlog, | |
15217 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15218 | get_section_name (reader->die_section), |
bf6af496 DE |
15219 | (unsigned) (info_ptr - reader->die_section->buffer), |
15220 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15221 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
15222 | } |
15223 | ||
15224 | return die; | |
15225 | } | |
15226 | ||
3019eac3 DE |
15227 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
15228 | attributes. | |
15229 | The caller is responsible for filling in the extra attributes | |
15230 | and updating (*DIEP)->num_attrs. | |
15231 | Set DIEP to point to a newly allocated die with its information, | |
15232 | except for its child, sibling, and parent fields. | |
15233 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 15234 | |
d521ce57 | 15235 | static const gdb_byte * |
3019eac3 | 15236 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 15237 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 15238 | int *has_children, int num_extra_attrs) |
93311388 | 15239 | { |
b64f50a1 JK |
15240 | unsigned int abbrev_number, bytes_read, i; |
15241 | sect_offset offset; | |
93311388 DE |
15242 | struct abbrev_info *abbrev; |
15243 | struct die_info *die; | |
15244 | struct dwarf2_cu *cu = reader->cu; | |
15245 | bfd *abfd = reader->abfd; | |
15246 | ||
b64f50a1 | 15247 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
15248 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15249 | info_ptr += bytes_read; | |
15250 | if (!abbrev_number) | |
15251 | { | |
15252 | *diep = NULL; | |
15253 | *has_children = 0; | |
15254 | return info_ptr; | |
15255 | } | |
15256 | ||
433df2d4 | 15257 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 15258 | if (!abbrev) |
348e048f DE |
15259 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
15260 | abbrev_number, | |
15261 | bfd_get_filename (abfd)); | |
15262 | ||
3019eac3 | 15263 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
15264 | die->offset = offset; |
15265 | die->tag = abbrev->tag; | |
15266 | die->abbrev = abbrev_number; | |
15267 | ||
3019eac3 DE |
15268 | /* Make the result usable. |
15269 | The caller needs to update num_attrs after adding the extra | |
15270 | attributes. */ | |
93311388 DE |
15271 | die->num_attrs = abbrev->num_attrs; |
15272 | ||
15273 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
15274 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
15275 | info_ptr); | |
93311388 DE |
15276 | |
15277 | *diep = die; | |
15278 | *has_children = abbrev->has_children; | |
15279 | return info_ptr; | |
15280 | } | |
15281 | ||
3019eac3 DE |
15282 | /* Read a die and all its attributes. |
15283 | Set DIEP to point to a newly allocated die with its information, | |
15284 | except for its child, sibling, and parent fields. | |
15285 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
15286 | ||
d521ce57 | 15287 | static const gdb_byte * |
3019eac3 | 15288 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 15289 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
15290 | int *has_children) |
15291 | { | |
d521ce57 | 15292 | const gdb_byte *result; |
bf6af496 DE |
15293 | |
15294 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
15295 | ||
b4f54984 | 15296 | if (dwarf_die_debug) |
bf6af496 DE |
15297 | { |
15298 | fprintf_unfiltered (gdb_stdlog, | |
15299 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15300 | get_section_name (reader->die_section), |
bf6af496 DE |
15301 | (unsigned) (info_ptr - reader->die_section->buffer), |
15302 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15303 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
15304 | } |
15305 | ||
15306 | return result; | |
3019eac3 | 15307 | } |
433df2d4 DE |
15308 | \f |
15309 | /* Abbreviation tables. | |
3019eac3 | 15310 | |
433df2d4 | 15311 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
15312 | stored in a separate .debug_abbrev section. Before we read any |
15313 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
15314 | in a hash table. */ |
15315 | ||
15316 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
15317 | ||
15318 | static struct abbrev_info * | |
15319 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
15320 | { | |
15321 | struct abbrev_info *abbrev; | |
15322 | ||
8d749320 | 15323 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 15324 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 15325 | |
433df2d4 DE |
15326 | return abbrev; |
15327 | } | |
15328 | ||
15329 | /* Add an abbreviation to the table. */ | |
c906108c SS |
15330 | |
15331 | static void | |
433df2d4 DE |
15332 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15333 | unsigned int abbrev_number, | |
15334 | struct abbrev_info *abbrev) | |
15335 | { | |
15336 | unsigned int hash_number; | |
15337 | ||
15338 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15339 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15340 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15341 | } | |
dee91e82 | 15342 | |
433df2d4 DE |
15343 | /* Look up an abbrev in the table. |
15344 | Returns NULL if the abbrev is not found. */ | |
15345 | ||
15346 | static struct abbrev_info * | |
15347 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15348 | unsigned int abbrev_number) | |
c906108c | 15349 | { |
433df2d4 DE |
15350 | unsigned int hash_number; |
15351 | struct abbrev_info *abbrev; | |
15352 | ||
15353 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15354 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15355 | ||
15356 | while (abbrev) | |
15357 | { | |
15358 | if (abbrev->number == abbrev_number) | |
15359 | return abbrev; | |
15360 | abbrev = abbrev->next; | |
15361 | } | |
15362 | return NULL; | |
15363 | } | |
15364 | ||
15365 | /* Read in an abbrev table. */ | |
15366 | ||
15367 | static struct abbrev_table * | |
15368 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
15369 | sect_offset offset) | |
15370 | { | |
15371 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15372 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15373 | struct abbrev_table *abbrev_table; |
d521ce57 | 15374 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15375 | struct abbrev_info *cur_abbrev; |
15376 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15377 | unsigned int abbrev_form; |
f3dd6933 DJ |
15378 | struct attr_abbrev *cur_attrs; |
15379 | unsigned int allocated_attrs; | |
c906108c | 15380 | |
70ba0933 | 15381 | abbrev_table = XNEW (struct abbrev_table); |
f4dc4d17 | 15382 | abbrev_table->offset = offset; |
433df2d4 | 15383 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
15384 | abbrev_table->abbrevs = |
15385 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
15386 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
15387 | memset (abbrev_table->abbrevs, 0, |
15388 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15389 | |
433df2d4 DE |
15390 | dwarf2_read_section (objfile, section); |
15391 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
15392 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15393 | abbrev_ptr += bytes_read; | |
15394 | ||
f3dd6933 | 15395 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 15396 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 15397 | |
0963b4bd | 15398 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15399 | while (abbrev_number) |
15400 | { | |
433df2d4 | 15401 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15402 | |
15403 | /* read in abbrev header */ | |
15404 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
15405 | cur_abbrev->tag |
15406 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
15407 | abbrev_ptr += bytes_read; |
15408 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15409 | abbrev_ptr += 1; | |
15410 | ||
15411 | /* now read in declarations */ | |
15412 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15413 | abbrev_ptr += bytes_read; | |
15414 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15415 | abbrev_ptr += bytes_read; | |
15416 | while (abbrev_name) | |
15417 | { | |
f3dd6933 | 15418 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15419 | { |
f3dd6933 DJ |
15420 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15421 | cur_attrs | |
224c3ddb | 15422 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 15423 | } |
ae038cb0 | 15424 | |
aead7601 SM |
15425 | cur_attrs[cur_abbrev->num_attrs].name |
15426 | = (enum dwarf_attribute) abbrev_name; | |
15427 | cur_attrs[cur_abbrev->num_attrs++].form | |
15428 | = (enum dwarf_form) abbrev_form; | |
c906108c SS |
15429 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15430 | abbrev_ptr += bytes_read; | |
15431 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15432 | abbrev_ptr += bytes_read; | |
15433 | } | |
15434 | ||
8d749320 SM |
15435 | cur_abbrev->attrs = |
15436 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
15437 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
15438 | memcpy (cur_abbrev->attrs, cur_attrs, |
15439 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15440 | ||
433df2d4 | 15441 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15442 | |
15443 | /* Get next abbreviation. | |
15444 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15445 | always properly terminated with an abbrev number of 0. |
15446 | Exit loop if we encounter an abbreviation which we have | |
15447 | already read (which means we are about to read the abbreviations | |
15448 | for the next compile unit) or if the end of the abbreviation | |
15449 | table is reached. */ | |
433df2d4 | 15450 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15451 | break; |
15452 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15453 | abbrev_ptr += bytes_read; | |
433df2d4 | 15454 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15455 | break; |
15456 | } | |
f3dd6933 DJ |
15457 | |
15458 | xfree (cur_attrs); | |
433df2d4 | 15459 | return abbrev_table; |
c906108c SS |
15460 | } |
15461 | ||
433df2d4 | 15462 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15463 | |
c906108c | 15464 | static void |
433df2d4 | 15465 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15466 | { |
433df2d4 DE |
15467 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15468 | xfree (abbrev_table); | |
c906108c SS |
15469 | } |
15470 | ||
f4dc4d17 DE |
15471 | /* Same as abbrev_table_free but as a cleanup. |
15472 | We pass in a pointer to the pointer to the table so that we can | |
15473 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15474 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15475 | |
15476 | static void | |
15477 | abbrev_table_free_cleanup (void *table_ptr) | |
15478 | { | |
9a3c8263 | 15479 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
15480 | |
15481 | if (*abbrev_table_ptr != NULL) | |
15482 | abbrev_table_free (*abbrev_table_ptr); | |
15483 | *abbrev_table_ptr = NULL; | |
15484 | } | |
15485 | ||
433df2d4 DE |
15486 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15487 | ||
15488 | static void | |
15489 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15490 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15491 | { |
433df2d4 DE |
15492 | cu->abbrev_table = |
15493 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
15494 | } | |
c906108c | 15495 | |
433df2d4 | 15496 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15497 | |
433df2d4 DE |
15498 | static void |
15499 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15500 | { | |
9a3c8263 | 15501 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 15502 | |
a2ce51a0 DE |
15503 | if (cu->abbrev_table != NULL) |
15504 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15505 | /* Set this to NULL so that we SEGV if we try to read it later, |
15506 | and also because free_comp_unit verifies this is NULL. */ | |
15507 | cu->abbrev_table = NULL; | |
15508 | } | |
15509 | \f | |
72bf9492 DJ |
15510 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15511 | symbol for. */ | |
15512 | ||
15513 | static int | |
15514 | is_type_tag_for_partial (int tag) | |
15515 | { | |
15516 | switch (tag) | |
15517 | { | |
15518 | #if 0 | |
15519 | /* Some types that would be reasonable to generate partial symbols for, | |
15520 | that we don't at present. */ | |
15521 | case DW_TAG_array_type: | |
15522 | case DW_TAG_file_type: | |
15523 | case DW_TAG_ptr_to_member_type: | |
15524 | case DW_TAG_set_type: | |
15525 | case DW_TAG_string_type: | |
15526 | case DW_TAG_subroutine_type: | |
15527 | #endif | |
15528 | case DW_TAG_base_type: | |
15529 | case DW_TAG_class_type: | |
680b30c7 | 15530 | case DW_TAG_interface_type: |
72bf9492 DJ |
15531 | case DW_TAG_enumeration_type: |
15532 | case DW_TAG_structure_type: | |
15533 | case DW_TAG_subrange_type: | |
15534 | case DW_TAG_typedef: | |
15535 | case DW_TAG_union_type: | |
15536 | return 1; | |
15537 | default: | |
15538 | return 0; | |
15539 | } | |
15540 | } | |
15541 | ||
15542 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15543 | ||
15544 | static struct partial_die_info * | |
dee91e82 | 15545 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15546 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15547 | { |
dee91e82 | 15548 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15549 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15550 | struct partial_die_info *part_die; |
15551 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15552 | struct abbrev_info *abbrev; | |
15553 | unsigned int bytes_read; | |
5afb4e99 | 15554 | unsigned int load_all = 0; |
72bf9492 DJ |
15555 | int nesting_level = 1; |
15556 | ||
15557 | parent_die = NULL; | |
15558 | last_die = NULL; | |
15559 | ||
7adf1e79 DE |
15560 | gdb_assert (cu->per_cu != NULL); |
15561 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
15562 | load_all = 1; |
15563 | ||
72bf9492 DJ |
15564 | cu->partial_dies |
15565 | = htab_create_alloc_ex (cu->header.length / 12, | |
15566 | partial_die_hash, | |
15567 | partial_die_eq, | |
15568 | NULL, | |
15569 | &cu->comp_unit_obstack, | |
15570 | hashtab_obstack_allocate, | |
15571 | dummy_obstack_deallocate); | |
15572 | ||
8d749320 | 15573 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
15574 | |
15575 | while (1) | |
15576 | { | |
15577 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
15578 | ||
15579 | /* A NULL abbrev means the end of a series of children. */ | |
15580 | if (abbrev == NULL) | |
15581 | { | |
15582 | if (--nesting_level == 0) | |
15583 | { | |
15584 | /* PART_DIE was probably the last thing allocated on the | |
15585 | comp_unit_obstack, so we could call obstack_free | |
15586 | here. We don't do that because the waste is small, | |
15587 | and will be cleaned up when we're done with this | |
15588 | compilation unit. This way, we're also more robust | |
15589 | against other users of the comp_unit_obstack. */ | |
15590 | return first_die; | |
15591 | } | |
15592 | info_ptr += bytes_read; | |
15593 | last_die = parent_die; | |
15594 | parent_die = parent_die->die_parent; | |
15595 | continue; | |
15596 | } | |
15597 | ||
98bfdba5 PA |
15598 | /* Check for template arguments. We never save these; if |
15599 | they're seen, we just mark the parent, and go on our way. */ | |
15600 | if (parent_die != NULL | |
15601 | && cu->language == language_cplus | |
15602 | && (abbrev->tag == DW_TAG_template_type_param | |
15603 | || abbrev->tag == DW_TAG_template_value_param)) | |
15604 | { | |
15605 | parent_die->has_template_arguments = 1; | |
15606 | ||
15607 | if (!load_all) | |
15608 | { | |
15609 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 15610 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15611 | continue; |
15612 | } | |
15613 | } | |
15614 | ||
0d99eb77 | 15615 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
15616 | Skip their other children. */ |
15617 | if (!load_all | |
15618 | && cu->language == language_cplus | |
15619 | && parent_die != NULL | |
15620 | && parent_die->tag == DW_TAG_subprogram) | |
15621 | { | |
dee91e82 | 15622 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15623 | continue; |
15624 | } | |
15625 | ||
5afb4e99 DJ |
15626 | /* Check whether this DIE is interesting enough to save. Normally |
15627 | we would not be interested in members here, but there may be | |
15628 | later variables referencing them via DW_AT_specification (for | |
15629 | static members). */ | |
15630 | if (!load_all | |
15631 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 15632 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
15633 | && abbrev->tag != DW_TAG_enumerator |
15634 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 15635 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 15636 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 15637 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 15638 | && abbrev->tag != DW_TAG_module |
95554aad | 15639 | && abbrev->tag != DW_TAG_member |
74921315 KS |
15640 | && abbrev->tag != DW_TAG_imported_unit |
15641 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
15642 | { |
15643 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15644 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
15645 | continue; |
15646 | } | |
15647 | ||
dee91e82 DE |
15648 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
15649 | info_ptr); | |
72bf9492 DJ |
15650 | |
15651 | /* This two-pass algorithm for processing partial symbols has a | |
15652 | high cost in cache pressure. Thus, handle some simple cases | |
15653 | here which cover the majority of C partial symbols. DIEs | |
15654 | which neither have specification tags in them, nor could have | |
15655 | specification tags elsewhere pointing at them, can simply be | |
15656 | processed and discarded. | |
15657 | ||
15658 | This segment is also optional; scan_partial_symbols and | |
15659 | add_partial_symbol will handle these DIEs if we chain | |
15660 | them in normally. When compilers which do not emit large | |
15661 | quantities of duplicate debug information are more common, | |
15662 | this code can probably be removed. */ | |
15663 | ||
15664 | /* Any complete simple types at the top level (pretty much all | |
15665 | of them, for a language without namespaces), can be processed | |
15666 | directly. */ | |
15667 | if (parent_die == NULL | |
15668 | && part_die->has_specification == 0 | |
15669 | && part_die->is_declaration == 0 | |
d8228535 | 15670 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
15671 | || part_die->tag == DW_TAG_base_type |
15672 | || part_die->tag == DW_TAG_subrange_type)) | |
15673 | { | |
15674 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 15675 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15676 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 15677 | &objfile->static_psymbols, |
1762568f | 15678 | 0, cu->language, objfile); |
dee91e82 | 15679 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15680 | continue; |
15681 | } | |
15682 | ||
d8228535 JK |
15683 | /* The exception for DW_TAG_typedef with has_children above is |
15684 | a workaround of GCC PR debug/47510. In the case of this complaint | |
15685 | type_name_no_tag_or_error will error on such types later. | |
15686 | ||
15687 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
15688 | it could not find the child DIEs referenced later, this is checked | |
15689 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
15690 | ||
15691 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
15692 | complaint (&symfile_complaints, | |
15693 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
15694 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15695 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 15696 | |
72bf9492 DJ |
15697 | /* If we're at the second level, and we're an enumerator, and |
15698 | our parent has no specification (meaning possibly lives in a | |
15699 | namespace elsewhere), then we can add the partial symbol now | |
15700 | instead of queueing it. */ | |
15701 | if (part_die->tag == DW_TAG_enumerator | |
15702 | && parent_die != NULL | |
15703 | && parent_die->die_parent == NULL | |
15704 | && parent_die->tag == DW_TAG_enumeration_type | |
15705 | && parent_die->has_specification == 0) | |
15706 | { | |
15707 | if (part_die->name == NULL) | |
3e43a32a MS |
15708 | complaint (&symfile_complaints, |
15709 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 15710 | else if (building_psymtab) |
04a679b8 | 15711 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15712 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 15713 | cu->language == language_cplus |
bb5ed363 DE |
15714 | ? &objfile->global_psymbols |
15715 | : &objfile->static_psymbols, | |
1762568f | 15716 | 0, cu->language, objfile); |
72bf9492 | 15717 | |
dee91e82 | 15718 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15719 | continue; |
15720 | } | |
15721 | ||
15722 | /* We'll save this DIE so link it in. */ | |
15723 | part_die->die_parent = parent_die; | |
15724 | part_die->die_sibling = NULL; | |
15725 | part_die->die_child = NULL; | |
15726 | ||
15727 | if (last_die && last_die == parent_die) | |
15728 | last_die->die_child = part_die; | |
15729 | else if (last_die) | |
15730 | last_die->die_sibling = part_die; | |
15731 | ||
15732 | last_die = part_die; | |
15733 | ||
15734 | if (first_die == NULL) | |
15735 | first_die = part_die; | |
15736 | ||
15737 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
15738 | find interesting need to be in the hash table, because we | |
15739 | also have the parent/sibling/child chains; only those that we | |
15740 | might refer to by offset later during partial symbol reading. | |
15741 | ||
15742 | For now this means things that might have be the target of a | |
15743 | DW_AT_specification, DW_AT_abstract_origin, or | |
15744 | DW_AT_extension. DW_AT_extension will refer only to | |
15745 | namespaces; DW_AT_abstract_origin refers to functions (and | |
15746 | many things under the function DIE, but we do not recurse | |
15747 | into function DIEs during partial symbol reading) and | |
15748 | possibly variables as well; DW_AT_specification refers to | |
15749 | declarations. Declarations ought to have the DW_AT_declaration | |
15750 | flag. It happens that GCC forgets to put it in sometimes, but | |
15751 | only for functions, not for types. | |
15752 | ||
15753 | Adding more things than necessary to the hash table is harmless | |
15754 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
15755 | wasted time in find_partial_die, when we reread the compilation |
15756 | unit with load_all_dies set. */ | |
72bf9492 | 15757 | |
5afb4e99 | 15758 | if (load_all |
72929c62 | 15759 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 15760 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
15761 | || abbrev->tag == DW_TAG_variable |
15762 | || abbrev->tag == DW_TAG_namespace | |
15763 | || part_die->is_declaration) | |
15764 | { | |
15765 | void **slot; | |
15766 | ||
15767 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 15768 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
15769 | *slot = part_die; |
15770 | } | |
15771 | ||
8d749320 | 15772 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
15773 | |
15774 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 15775 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
15776 | languages we have to, so that we can get at method physnames |
15777 | to infer fully qualified class names, for DW_AT_specification, | |
15778 | and for C++ template arguments. For C++, we also look one level | |
15779 | inside functions to find template arguments (if the name of the | |
15780 | function does not already contain the template arguments). | |
bc30ff58 JB |
15781 | |
15782 | For Ada, we need to scan the children of subprograms and lexical | |
15783 | blocks as well because Ada allows the definition of nested | |
15784 | entities that could be interesting for the debugger, such as | |
15785 | nested subprograms for instance. */ | |
72bf9492 | 15786 | if (last_die->has_children |
5afb4e99 DJ |
15787 | && (load_all |
15788 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 15789 | || last_die->tag == DW_TAG_module |
72bf9492 | 15790 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
15791 | || (cu->language == language_cplus |
15792 | && last_die->tag == DW_TAG_subprogram | |
15793 | && (last_die->name == NULL | |
15794 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
15795 | || (cu->language != language_c |
15796 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 15797 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 15798 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
15799 | || last_die->tag == DW_TAG_union_type)) |
15800 | || (cu->language == language_ada | |
15801 | && (last_die->tag == DW_TAG_subprogram | |
15802 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
15803 | { |
15804 | nesting_level++; | |
15805 | parent_die = last_die; | |
15806 | continue; | |
15807 | } | |
15808 | ||
15809 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15810 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
15811 | |
15812 | /* Back to the top, do it again. */ | |
15813 | } | |
15814 | } | |
15815 | ||
c906108c SS |
15816 | /* Read a minimal amount of information into the minimal die structure. */ |
15817 | ||
d521ce57 | 15818 | static const gdb_byte * |
dee91e82 DE |
15819 | read_partial_die (const struct die_reader_specs *reader, |
15820 | struct partial_die_info *part_die, | |
15821 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 15822 | const gdb_byte *info_ptr) |
c906108c | 15823 | { |
dee91e82 | 15824 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15825 | struct objfile *objfile = cu->objfile; |
d521ce57 | 15826 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 15827 | unsigned int i; |
c906108c | 15828 | struct attribute attr; |
c5aa993b | 15829 | int has_low_pc_attr = 0; |
c906108c | 15830 | int has_high_pc_attr = 0; |
91da1414 | 15831 | int high_pc_relative = 0; |
c906108c | 15832 | |
72bf9492 | 15833 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 15834 | |
b64f50a1 | 15835 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
15836 | |
15837 | info_ptr += abbrev_len; | |
15838 | ||
15839 | if (abbrev == NULL) | |
15840 | return info_ptr; | |
15841 | ||
c906108c SS |
15842 | part_die->tag = abbrev->tag; |
15843 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
15844 | |
15845 | for (i = 0; i < abbrev->num_attrs; ++i) | |
15846 | { | |
dee91e82 | 15847 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
15848 | |
15849 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 15850 | partial symbol table. */ |
c906108c SS |
15851 | switch (attr.name) |
15852 | { | |
15853 | case DW_AT_name: | |
71c25dea TT |
15854 | switch (part_die->tag) |
15855 | { | |
15856 | case DW_TAG_compile_unit: | |
95554aad | 15857 | case DW_TAG_partial_unit: |
348e048f | 15858 | case DW_TAG_type_unit: |
71c25dea TT |
15859 | /* Compilation units have a DW_AT_name that is a filename, not |
15860 | a source language identifier. */ | |
15861 | case DW_TAG_enumeration_type: | |
15862 | case DW_TAG_enumerator: | |
15863 | /* These tags always have simple identifiers already; no need | |
15864 | to canonicalize them. */ | |
15865 | part_die->name = DW_STRING (&attr); | |
15866 | break; | |
15867 | default: | |
15868 | part_die->name | |
15869 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 15870 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
15871 | break; |
15872 | } | |
c906108c | 15873 | break; |
31ef98ae | 15874 | case DW_AT_linkage_name: |
c906108c | 15875 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
15876 | /* Note that both forms of linkage name might appear. We |
15877 | assume they will be the same, and we only store the last | |
15878 | one we see. */ | |
94af9270 KS |
15879 | if (cu->language == language_ada) |
15880 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 15881 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
15882 | break; |
15883 | case DW_AT_low_pc: | |
15884 | has_low_pc_attr = 1; | |
31aa7e4e | 15885 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
15886 | break; |
15887 | case DW_AT_high_pc: | |
15888 | has_high_pc_attr = 1; | |
31aa7e4e JB |
15889 | part_die->highpc = attr_value_as_address (&attr); |
15890 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
15891 | high_pc_relative = 1; | |
c906108c SS |
15892 | break; |
15893 | case DW_AT_location: | |
0963b4bd | 15894 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
15895 | if (attr_form_is_block (&attr)) |
15896 | { | |
95554aad | 15897 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 15898 | } |
3690dd37 | 15899 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 15900 | { |
4d3c2250 | 15901 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15902 | } |
15903 | else | |
15904 | { | |
4d3c2250 KB |
15905 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
15906 | "partial symbol information"); | |
8e19ed76 | 15907 | } |
c906108c | 15908 | break; |
c906108c SS |
15909 | case DW_AT_external: |
15910 | part_die->is_external = DW_UNSND (&attr); | |
15911 | break; | |
15912 | case DW_AT_declaration: | |
15913 | part_die->is_declaration = DW_UNSND (&attr); | |
15914 | break; | |
15915 | case DW_AT_type: | |
15916 | part_die->has_type = 1; | |
15917 | break; | |
15918 | case DW_AT_abstract_origin: | |
15919 | case DW_AT_specification: | |
72bf9492 DJ |
15920 | case DW_AT_extension: |
15921 | part_die->has_specification = 1; | |
c764a876 | 15922 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
15923 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
15924 | || cu->per_cu->is_dwz); | |
c906108c SS |
15925 | break; |
15926 | case DW_AT_sibling: | |
15927 | /* Ignore absolute siblings, they might point outside of | |
15928 | the current compile unit. */ | |
15929 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
15930 | complaint (&symfile_complaints, |
15931 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 15932 | else |
b9502d3f WN |
15933 | { |
15934 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
15935 | const gdb_byte *sibling_ptr = buffer + off; | |
15936 | ||
15937 | if (sibling_ptr < info_ptr) | |
15938 | complaint (&symfile_complaints, | |
15939 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
15940 | else if (sibling_ptr > reader->buffer_end) |
15941 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
15942 | else |
15943 | part_die->sibling = sibling_ptr; | |
15944 | } | |
c906108c | 15945 | break; |
fa4028e9 JB |
15946 | case DW_AT_byte_size: |
15947 | part_die->has_byte_size = 1; | |
15948 | break; | |
ff908ebf AW |
15949 | case DW_AT_const_value: |
15950 | part_die->has_const_value = 1; | |
15951 | break; | |
68511cec CES |
15952 | case DW_AT_calling_convention: |
15953 | /* DWARF doesn't provide a way to identify a program's source-level | |
15954 | entry point. DW_AT_calling_convention attributes are only meant | |
15955 | to describe functions' calling conventions. | |
15956 | ||
15957 | However, because it's a necessary piece of information in | |
0c1b455e TT |
15958 | Fortran, and before DWARF 4 DW_CC_program was the only |
15959 | piece of debugging information whose definition refers to | |
15960 | a 'main program' at all, several compilers marked Fortran | |
15961 | main programs with DW_CC_program --- even when those | |
15962 | functions use the standard calling conventions. | |
15963 | ||
15964 | Although DWARF now specifies a way to provide this | |
15965 | information, we support this practice for backward | |
15966 | compatibility. */ | |
68511cec | 15967 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
15968 | && cu->language == language_fortran) |
15969 | part_die->main_subprogram = 1; | |
68511cec | 15970 | break; |
481860b3 GB |
15971 | case DW_AT_inline: |
15972 | if (DW_UNSND (&attr) == DW_INL_inlined | |
15973 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
15974 | part_die->may_be_inlined = 1; | |
15975 | break; | |
95554aad TT |
15976 | |
15977 | case DW_AT_import: | |
15978 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
15979 | { |
15980 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
15981 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
15982 | || cu->per_cu->is_dwz); | |
15983 | } | |
95554aad TT |
15984 | break; |
15985 | ||
0c1b455e TT |
15986 | case DW_AT_main_subprogram: |
15987 | part_die->main_subprogram = DW_UNSND (&attr); | |
15988 | break; | |
15989 | ||
c906108c SS |
15990 | default: |
15991 | break; | |
15992 | } | |
15993 | } | |
15994 | ||
91da1414 MW |
15995 | if (high_pc_relative) |
15996 | part_die->highpc += part_die->lowpc; | |
15997 | ||
9373cf26 JK |
15998 | if (has_low_pc_attr && has_high_pc_attr) |
15999 | { | |
16000 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
16001 | eliminate duplicate copies of functions and vtables and such. | |
16002 | The linker will arbitrarily choose one and discard the others. | |
16003 | The AT_*_pc values for such functions refer to local labels in | |
16004 | these sections. If the section from that file was discarded, the | |
16005 | labels are not in the output, so the relocs get a value of 0. | |
16006 | If this is a discarded function, mark the pc bounds as invalid, | |
16007 | so that GDB will ignore it. */ | |
16008 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
16009 | { | |
bb5ed363 | 16010 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16011 | |
16012 | complaint (&symfile_complaints, | |
16013 | _("DW_AT_low_pc %s is zero " | |
16014 | "for DIE at 0x%x [in module %s]"), | |
16015 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 16016 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
16017 | } |
16018 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
16019 | else if (part_die->lowpc >= part_die->highpc) | |
16020 | { | |
bb5ed363 | 16021 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16022 | |
16023 | complaint (&symfile_complaints, | |
16024 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
16025 | "for DIE at 0x%x [in module %s]"), | |
16026 | paddress (gdbarch, part_die->lowpc), | |
16027 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 16028 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
16029 | } |
16030 | else | |
16031 | part_die->has_pc_info = 1; | |
16032 | } | |
85cbf3d3 | 16033 | |
c906108c SS |
16034 | return info_ptr; |
16035 | } | |
16036 | ||
72bf9492 DJ |
16037 | /* Find a cached partial DIE at OFFSET in CU. */ |
16038 | ||
16039 | static struct partial_die_info * | |
b64f50a1 | 16040 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
16041 | { |
16042 | struct partial_die_info *lookup_die = NULL; | |
16043 | struct partial_die_info part_die; | |
16044 | ||
16045 | part_die.offset = offset; | |
9a3c8263 SM |
16046 | lookup_die = ((struct partial_die_info *) |
16047 | htab_find_with_hash (cu->partial_dies, &part_die, | |
16048 | offset.sect_off)); | |
72bf9492 | 16049 | |
72bf9492 DJ |
16050 | return lookup_die; |
16051 | } | |
16052 | ||
348e048f DE |
16053 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
16054 | except in the case of .debug_types DIEs which do not reference | |
16055 | outside their CU (they do however referencing other types via | |
55f1336d | 16056 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
16057 | |
16058 | static struct partial_die_info * | |
36586728 | 16059 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 16060 | { |
bb5ed363 | 16061 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
16062 | struct dwarf2_per_cu_data *per_cu = NULL; |
16063 | struct partial_die_info *pd = NULL; | |
72bf9492 | 16064 | |
36586728 TT |
16065 | if (offset_in_dwz == cu->per_cu->is_dwz |
16066 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
16067 | { |
16068 | pd = find_partial_die_in_comp_unit (offset, cu); | |
16069 | if (pd != NULL) | |
16070 | return pd; | |
0d99eb77 DE |
16071 | /* We missed recording what we needed. |
16072 | Load all dies and try again. */ | |
16073 | per_cu = cu->per_cu; | |
5afb4e99 | 16074 | } |
0d99eb77 DE |
16075 | else |
16076 | { | |
16077 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 16078 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
16079 | { |
16080 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
16081 | " external reference to offset 0x%lx [in module %s].\n"), | |
16082 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
16083 | bfd_get_filename (objfile->obfd)); | |
16084 | } | |
36586728 TT |
16085 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
16086 | objfile); | |
72bf9492 | 16087 | |
0d99eb77 DE |
16088 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
16089 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 16090 | |
0d99eb77 DE |
16091 | per_cu->cu->last_used = 0; |
16092 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
16093 | } | |
5afb4e99 | 16094 | |
dee91e82 DE |
16095 | /* If we didn't find it, and not all dies have been loaded, |
16096 | load them all and try again. */ | |
16097 | ||
5afb4e99 DJ |
16098 | if (pd == NULL && per_cu->load_all_dies == 0) |
16099 | { | |
5afb4e99 | 16100 | per_cu->load_all_dies = 1; |
fd820528 DE |
16101 | |
16102 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
16103 | THIS_CU->cu may already be in use. So we can't just free it and | |
16104 | replace its DIEs with the ones we read in. Instead, we leave those | |
16105 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
16106 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
16107 | set. */ | |
dee91e82 | 16108 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
16109 | |
16110 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
16111 | } | |
16112 | ||
16113 | if (pd == NULL) | |
16114 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
16115 | _("could not find partial DIE 0x%x " |
16116 | "in cache [from module %s]\n"), | |
b64f50a1 | 16117 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 16118 | return pd; |
72bf9492 DJ |
16119 | } |
16120 | ||
abc72ce4 DE |
16121 | /* See if we can figure out if the class lives in a namespace. We do |
16122 | this by looking for a member function; its demangled name will | |
16123 | contain namespace info, if there is any. */ | |
16124 | ||
16125 | static void | |
16126 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
16127 | struct dwarf2_cu *cu) | |
16128 | { | |
16129 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
16130 | what template types look like, because the demangler | |
16131 | frequently doesn't give the same name as the debug info. We | |
16132 | could fix this by only using the demangled name to get the | |
16133 | prefix (but see comment in read_structure_type). */ | |
16134 | ||
16135 | struct partial_die_info *real_pdi; | |
16136 | struct partial_die_info *child_pdi; | |
16137 | ||
16138 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
16139 | we should not do this. We'll prepend the parent's fully qualified | |
16140 | name when we create the partial symbol. */ | |
16141 | ||
16142 | real_pdi = struct_pdi; | |
16143 | while (real_pdi->has_specification) | |
36586728 TT |
16144 | real_pdi = find_partial_die (real_pdi->spec_offset, |
16145 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
16146 | |
16147 | if (real_pdi->die_parent != NULL) | |
16148 | return; | |
16149 | ||
16150 | for (child_pdi = struct_pdi->die_child; | |
16151 | child_pdi != NULL; | |
16152 | child_pdi = child_pdi->die_sibling) | |
16153 | { | |
16154 | if (child_pdi->tag == DW_TAG_subprogram | |
16155 | && child_pdi->linkage_name != NULL) | |
16156 | { | |
16157 | char *actual_class_name | |
16158 | = language_class_name_from_physname (cu->language_defn, | |
16159 | child_pdi->linkage_name); | |
16160 | if (actual_class_name != NULL) | |
16161 | { | |
16162 | struct_pdi->name | |
224c3ddb SM |
16163 | = ((const char *) |
16164 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16165 | actual_class_name, | |
16166 | strlen (actual_class_name))); | |
abc72ce4 DE |
16167 | xfree (actual_class_name); |
16168 | } | |
16169 | break; | |
16170 | } | |
16171 | } | |
16172 | } | |
16173 | ||
72bf9492 DJ |
16174 | /* Adjust PART_DIE before generating a symbol for it. This function |
16175 | may set the is_external flag or change the DIE's name. */ | |
16176 | ||
16177 | static void | |
16178 | fixup_partial_die (struct partial_die_info *part_die, | |
16179 | struct dwarf2_cu *cu) | |
16180 | { | |
abc72ce4 DE |
16181 | /* Once we've fixed up a die, there's no point in doing so again. |
16182 | This also avoids a memory leak if we were to call | |
16183 | guess_partial_die_structure_name multiple times. */ | |
16184 | if (part_die->fixup_called) | |
16185 | return; | |
16186 | ||
72bf9492 DJ |
16187 | /* If we found a reference attribute and the DIE has no name, try |
16188 | to find a name in the referred to DIE. */ | |
16189 | ||
16190 | if (part_die->name == NULL && part_die->has_specification) | |
16191 | { | |
16192 | struct partial_die_info *spec_die; | |
72bf9492 | 16193 | |
36586728 TT |
16194 | spec_die = find_partial_die (part_die->spec_offset, |
16195 | part_die->spec_is_dwz, cu); | |
72bf9492 | 16196 | |
10b3939b | 16197 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
16198 | |
16199 | if (spec_die->name) | |
16200 | { | |
16201 | part_die->name = spec_die->name; | |
16202 | ||
16203 | /* Copy DW_AT_external attribute if it is set. */ | |
16204 | if (spec_die->is_external) | |
16205 | part_die->is_external = spec_die->is_external; | |
16206 | } | |
16207 | } | |
16208 | ||
16209 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
16210 | |
16211 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 16212 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 16213 | |
abc72ce4 DE |
16214 | /* If there is no parent die to provide a namespace, and there are |
16215 | children, see if we can determine the namespace from their linkage | |
122d1940 | 16216 | name. */ |
abc72ce4 | 16217 | if (cu->language == language_cplus |
8b70b953 | 16218 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16219 | && part_die->die_parent == NULL |
16220 | && part_die->has_children | |
16221 | && (part_die->tag == DW_TAG_class_type | |
16222 | || part_die->tag == DW_TAG_structure_type | |
16223 | || part_die->tag == DW_TAG_union_type)) | |
16224 | guess_partial_die_structure_name (part_die, cu); | |
16225 | ||
53832f31 TT |
16226 | /* GCC might emit a nameless struct or union that has a linkage |
16227 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16228 | if (part_die->name == NULL | |
96408a79 SA |
16229 | && (part_die->tag == DW_TAG_class_type |
16230 | || part_die->tag == DW_TAG_interface_type | |
16231 | || part_die->tag == DW_TAG_structure_type | |
16232 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
16233 | && part_die->linkage_name != NULL) |
16234 | { | |
16235 | char *demangled; | |
16236 | ||
8de20a37 | 16237 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
16238 | if (demangled) |
16239 | { | |
96408a79 SA |
16240 | const char *base; |
16241 | ||
16242 | /* Strip any leading namespaces/classes, keep only the base name. | |
16243 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16244 | base = strrchr (demangled, ':'); | |
16245 | if (base && base > demangled && base[-1] == ':') | |
16246 | base++; | |
16247 | else | |
16248 | base = demangled; | |
16249 | ||
34a68019 | 16250 | part_die->name |
224c3ddb SM |
16251 | = ((const char *) |
16252 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16253 | base, strlen (base))); | |
53832f31 TT |
16254 | xfree (demangled); |
16255 | } | |
16256 | } | |
16257 | ||
abc72ce4 | 16258 | part_die->fixup_called = 1; |
72bf9492 DJ |
16259 | } |
16260 | ||
a8329558 | 16261 | /* Read an attribute value described by an attribute form. */ |
c906108c | 16262 | |
d521ce57 | 16263 | static const gdb_byte * |
dee91e82 DE |
16264 | read_attribute_value (const struct die_reader_specs *reader, |
16265 | struct attribute *attr, unsigned form, | |
d521ce57 | 16266 | const gdb_byte *info_ptr) |
c906108c | 16267 | { |
dee91e82 | 16268 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
16269 | struct objfile *objfile = cu->objfile; |
16270 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 16271 | bfd *abfd = reader->abfd; |
e7c27a73 | 16272 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16273 | unsigned int bytes_read; |
16274 | struct dwarf_block *blk; | |
16275 | ||
aead7601 | 16276 | attr->form = (enum dwarf_form) form; |
a8329558 | 16277 | switch (form) |
c906108c | 16278 | { |
c906108c | 16279 | case DW_FORM_ref_addr: |
ae411497 | 16280 | if (cu->header.version == 2) |
4568ecf9 | 16281 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 16282 | else |
4568ecf9 DE |
16283 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
16284 | &cu->header, &bytes_read); | |
ae411497 TT |
16285 | info_ptr += bytes_read; |
16286 | break; | |
36586728 TT |
16287 | case DW_FORM_GNU_ref_alt: |
16288 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16289 | info_ptr += bytes_read; | |
16290 | break; | |
ae411497 | 16291 | case DW_FORM_addr: |
e7c27a73 | 16292 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 16293 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 16294 | info_ptr += bytes_read; |
c906108c SS |
16295 | break; |
16296 | case DW_FORM_block2: | |
7b5a2f43 | 16297 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16298 | blk->size = read_2_bytes (abfd, info_ptr); |
16299 | info_ptr += 2; | |
16300 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16301 | info_ptr += blk->size; | |
16302 | DW_BLOCK (attr) = blk; | |
16303 | break; | |
16304 | case DW_FORM_block4: | |
7b5a2f43 | 16305 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16306 | blk->size = read_4_bytes (abfd, info_ptr); |
16307 | info_ptr += 4; | |
16308 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16309 | info_ptr += blk->size; | |
16310 | DW_BLOCK (attr) = blk; | |
16311 | break; | |
16312 | case DW_FORM_data2: | |
16313 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
16314 | info_ptr += 2; | |
16315 | break; | |
16316 | case DW_FORM_data4: | |
16317 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
16318 | info_ptr += 4; | |
16319 | break; | |
16320 | case DW_FORM_data8: | |
16321 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
16322 | info_ptr += 8; | |
16323 | break; | |
2dc7f7b3 TT |
16324 | case DW_FORM_sec_offset: |
16325 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16326 | info_ptr += bytes_read; | |
16327 | break; | |
c906108c | 16328 | case DW_FORM_string: |
9b1c24c8 | 16329 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 16330 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
16331 | info_ptr += bytes_read; |
16332 | break; | |
4bdf3d34 | 16333 | case DW_FORM_strp: |
36586728 TT |
16334 | if (!cu->per_cu->is_dwz) |
16335 | { | |
16336 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
16337 | &bytes_read); | |
16338 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16339 | info_ptr += bytes_read; | |
16340 | break; | |
16341 | } | |
16342 | /* FALLTHROUGH */ | |
16343 | case DW_FORM_GNU_strp_alt: | |
16344 | { | |
16345 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16346 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16347 | &bytes_read); | |
16348 | ||
16349 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16350 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16351 | info_ptr += bytes_read; | |
16352 | } | |
4bdf3d34 | 16353 | break; |
2dc7f7b3 | 16354 | case DW_FORM_exprloc: |
c906108c | 16355 | case DW_FORM_block: |
7b5a2f43 | 16356 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16357 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16358 | info_ptr += bytes_read; | |
16359 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16360 | info_ptr += blk->size; | |
16361 | DW_BLOCK (attr) = blk; | |
16362 | break; | |
16363 | case DW_FORM_block1: | |
7b5a2f43 | 16364 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16365 | blk->size = read_1_byte (abfd, info_ptr); |
16366 | info_ptr += 1; | |
16367 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16368 | info_ptr += blk->size; | |
16369 | DW_BLOCK (attr) = blk; | |
16370 | break; | |
16371 | case DW_FORM_data1: | |
16372 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16373 | info_ptr += 1; | |
16374 | break; | |
16375 | case DW_FORM_flag: | |
16376 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16377 | info_ptr += 1; | |
16378 | break; | |
2dc7f7b3 TT |
16379 | case DW_FORM_flag_present: |
16380 | DW_UNSND (attr) = 1; | |
16381 | break; | |
c906108c SS |
16382 | case DW_FORM_sdata: |
16383 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16384 | info_ptr += bytes_read; | |
16385 | break; | |
16386 | case DW_FORM_udata: | |
16387 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16388 | info_ptr += bytes_read; | |
16389 | break; | |
16390 | case DW_FORM_ref1: | |
4568ecf9 DE |
16391 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16392 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
16393 | info_ptr += 1; |
16394 | break; | |
16395 | case DW_FORM_ref2: | |
4568ecf9 DE |
16396 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16397 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
16398 | info_ptr += 2; |
16399 | break; | |
16400 | case DW_FORM_ref4: | |
4568ecf9 DE |
16401 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16402 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
16403 | info_ptr += 4; |
16404 | break; | |
613e1657 | 16405 | case DW_FORM_ref8: |
4568ecf9 DE |
16406 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16407 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
16408 | info_ptr += 8; |
16409 | break; | |
55f1336d | 16410 | case DW_FORM_ref_sig8: |
ac9ec31b | 16411 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16412 | info_ptr += 8; |
16413 | break; | |
c906108c | 16414 | case DW_FORM_ref_udata: |
4568ecf9 DE |
16415 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16416 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
16417 | info_ptr += bytes_read; |
16418 | break; | |
c906108c | 16419 | case DW_FORM_indirect: |
a8329558 KW |
16420 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16421 | info_ptr += bytes_read; | |
dee91e82 | 16422 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 16423 | break; |
3019eac3 DE |
16424 | case DW_FORM_GNU_addr_index: |
16425 | if (reader->dwo_file == NULL) | |
16426 | { | |
16427 | /* For now flag a hard error. | |
16428 | Later we can turn this into a complaint. */ | |
16429 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16430 | dwarf_form_name (form), | |
16431 | bfd_get_filename (abfd)); | |
16432 | } | |
16433 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16434 | info_ptr += bytes_read; | |
16435 | break; | |
16436 | case DW_FORM_GNU_str_index: | |
16437 | if (reader->dwo_file == NULL) | |
16438 | { | |
16439 | /* For now flag a hard error. | |
16440 | Later we can turn this into a complaint if warranted. */ | |
16441 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16442 | dwarf_form_name (form), | |
16443 | bfd_get_filename (abfd)); | |
16444 | } | |
16445 | { | |
16446 | ULONGEST str_index = | |
16447 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16448 | ||
342587c4 | 16449 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16450 | DW_STRING_IS_CANONICAL (attr) = 0; |
16451 | info_ptr += bytes_read; | |
16452 | } | |
16453 | break; | |
c906108c | 16454 | default: |
8a3fe4f8 | 16455 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16456 | dwarf_form_name (form), |
16457 | bfd_get_filename (abfd)); | |
c906108c | 16458 | } |
28e94949 | 16459 | |
36586728 | 16460 | /* Super hack. */ |
7771576e | 16461 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16462 | attr->form = DW_FORM_GNU_ref_alt; |
16463 | ||
28e94949 JB |
16464 | /* We have seen instances where the compiler tried to emit a byte |
16465 | size attribute of -1 which ended up being encoded as an unsigned | |
16466 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16467 | an object of this size seems pretty unlikely so we can relatively | |
16468 | safely treat these cases as if the size attribute was invalid and | |
16469 | treat them as zero by default. */ | |
16470 | if (attr->name == DW_AT_byte_size | |
16471 | && form == DW_FORM_data4 | |
16472 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16473 | { |
16474 | complaint | |
16475 | (&symfile_complaints, | |
43bbcdc2 PH |
16476 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
16477 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
16478 | DW_UNSND (attr) = 0; |
16479 | } | |
28e94949 | 16480 | |
c906108c SS |
16481 | return info_ptr; |
16482 | } | |
16483 | ||
a8329558 KW |
16484 | /* Read an attribute described by an abbreviated attribute. */ |
16485 | ||
d521ce57 | 16486 | static const gdb_byte * |
dee91e82 DE |
16487 | read_attribute (const struct die_reader_specs *reader, |
16488 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 16489 | const gdb_byte *info_ptr) |
a8329558 KW |
16490 | { |
16491 | attr->name = abbrev->name; | |
dee91e82 | 16492 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
16493 | } |
16494 | ||
0963b4bd | 16495 | /* Read dwarf information from a buffer. */ |
c906108c SS |
16496 | |
16497 | static unsigned int | |
a1855c1d | 16498 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16499 | { |
fe1b8b76 | 16500 | return bfd_get_8 (abfd, buf); |
c906108c SS |
16501 | } |
16502 | ||
16503 | static int | |
a1855c1d | 16504 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16505 | { |
fe1b8b76 | 16506 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
16507 | } |
16508 | ||
16509 | static unsigned int | |
a1855c1d | 16510 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16511 | { |
fe1b8b76 | 16512 | return bfd_get_16 (abfd, buf); |
c906108c SS |
16513 | } |
16514 | ||
21ae7a4d | 16515 | static int |
a1855c1d | 16516 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16517 | { |
16518 | return bfd_get_signed_16 (abfd, buf); | |
16519 | } | |
16520 | ||
c906108c | 16521 | static unsigned int |
a1855c1d | 16522 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16523 | { |
fe1b8b76 | 16524 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16525 | } |
16526 | ||
21ae7a4d | 16527 | static int |
a1855c1d | 16528 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16529 | { |
16530 | return bfd_get_signed_32 (abfd, buf); | |
16531 | } | |
16532 | ||
93311388 | 16533 | static ULONGEST |
a1855c1d | 16534 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16535 | { |
fe1b8b76 | 16536 | return bfd_get_64 (abfd, buf); |
c906108c SS |
16537 | } |
16538 | ||
16539 | static CORE_ADDR | |
d521ce57 | 16540 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 16541 | unsigned int *bytes_read) |
c906108c | 16542 | { |
e7c27a73 | 16543 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16544 | CORE_ADDR retval = 0; |
16545 | ||
107d2387 | 16546 | if (cu_header->signed_addr_p) |
c906108c | 16547 | { |
107d2387 AC |
16548 | switch (cu_header->addr_size) |
16549 | { | |
16550 | case 2: | |
fe1b8b76 | 16551 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
16552 | break; |
16553 | case 4: | |
fe1b8b76 | 16554 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
16555 | break; |
16556 | case 8: | |
fe1b8b76 | 16557 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
16558 | break; |
16559 | default: | |
8e65ff28 | 16560 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 16561 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 16562 | bfd_get_filename (abfd)); |
107d2387 AC |
16563 | } |
16564 | } | |
16565 | else | |
16566 | { | |
16567 | switch (cu_header->addr_size) | |
16568 | { | |
16569 | case 2: | |
fe1b8b76 | 16570 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
16571 | break; |
16572 | case 4: | |
fe1b8b76 | 16573 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
16574 | break; |
16575 | case 8: | |
fe1b8b76 | 16576 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
16577 | break; |
16578 | default: | |
8e65ff28 | 16579 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
16580 | _("read_address: bad switch, " |
16581 | "unsigned [in module %s]"), | |
659b0389 | 16582 | bfd_get_filename (abfd)); |
107d2387 | 16583 | } |
c906108c | 16584 | } |
64367e0a | 16585 | |
107d2387 AC |
16586 | *bytes_read = cu_header->addr_size; |
16587 | return retval; | |
c906108c SS |
16588 | } |
16589 | ||
f7ef9339 | 16590 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
16591 | specification allows the initial length to take up either 4 bytes |
16592 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
16593 | bytes describe the length and all offsets will be 8 bytes in length | |
16594 | instead of 4. | |
16595 | ||
f7ef9339 KB |
16596 | An older, non-standard 64-bit format is also handled by this |
16597 | function. The older format in question stores the initial length | |
16598 | as an 8-byte quantity without an escape value. Lengths greater | |
16599 | than 2^32 aren't very common which means that the initial 4 bytes | |
16600 | is almost always zero. Since a length value of zero doesn't make | |
16601 | sense for the 32-bit format, this initial zero can be considered to | |
16602 | be an escape value which indicates the presence of the older 64-bit | |
16603 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
16604 | greater than 4GB. If it becomes necessary to handle lengths |
16605 | somewhat larger than 4GB, we could allow other small values (such | |
16606 | as the non-sensical values of 1, 2, and 3) to also be used as | |
16607 | escape values indicating the presence of the old format. | |
f7ef9339 | 16608 | |
917c78fc MK |
16609 | The value returned via bytes_read should be used to increment the |
16610 | relevant pointer after calling read_initial_length(). | |
c764a876 | 16611 | |
613e1657 KB |
16612 | [ Note: read_initial_length() and read_offset() are based on the |
16613 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 16614 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
16615 | from: |
16616 | ||
f7ef9339 | 16617 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 16618 | |
613e1657 KB |
16619 | This document is only a draft and is subject to change. (So beware.) |
16620 | ||
f7ef9339 | 16621 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
16622 | determined empirically by examining 64-bit ELF files produced by |
16623 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
16624 | |
16625 | - Kevin, July 16, 2002 | |
613e1657 KB |
16626 | ] */ |
16627 | ||
16628 | static LONGEST | |
d521ce57 | 16629 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 16630 | { |
fe1b8b76 | 16631 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 16632 | |
dd373385 | 16633 | if (length == 0xffffffff) |
613e1657 | 16634 | { |
fe1b8b76 | 16635 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 16636 | *bytes_read = 12; |
613e1657 | 16637 | } |
dd373385 | 16638 | else if (length == 0) |
f7ef9339 | 16639 | { |
dd373385 | 16640 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 16641 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 16642 | *bytes_read = 8; |
f7ef9339 | 16643 | } |
613e1657 KB |
16644 | else |
16645 | { | |
16646 | *bytes_read = 4; | |
613e1657 KB |
16647 | } |
16648 | ||
c764a876 DE |
16649 | return length; |
16650 | } | |
dd373385 | 16651 | |
c764a876 DE |
16652 | /* Cover function for read_initial_length. |
16653 | Returns the length of the object at BUF, and stores the size of the | |
16654 | initial length in *BYTES_READ and stores the size that offsets will be in | |
16655 | *OFFSET_SIZE. | |
16656 | If the initial length size is not equivalent to that specified in | |
16657 | CU_HEADER then issue a complaint. | |
16658 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 16659 | |
c764a876 | 16660 | static LONGEST |
d521ce57 | 16661 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
16662 | const struct comp_unit_head *cu_header, |
16663 | unsigned int *bytes_read, | |
16664 | unsigned int *offset_size) | |
16665 | { | |
16666 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
16667 | ||
16668 | gdb_assert (cu_header->initial_length_size == 4 | |
16669 | || cu_header->initial_length_size == 8 | |
16670 | || cu_header->initial_length_size == 12); | |
16671 | ||
16672 | if (cu_header->initial_length_size != *bytes_read) | |
16673 | complaint (&symfile_complaints, | |
16674 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 16675 | |
c764a876 | 16676 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 16677 | return length; |
613e1657 KB |
16678 | } |
16679 | ||
16680 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 16681 | given by cu_header->offset_size. */ |
613e1657 KB |
16682 | |
16683 | static LONGEST | |
d521ce57 TT |
16684 | read_offset (bfd *abfd, const gdb_byte *buf, |
16685 | const struct comp_unit_head *cu_header, | |
891d2f0b | 16686 | unsigned int *bytes_read) |
c764a876 DE |
16687 | { |
16688 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 16689 | |
c764a876 DE |
16690 | *bytes_read = cu_header->offset_size; |
16691 | return offset; | |
16692 | } | |
16693 | ||
16694 | /* Read an offset from the data stream. */ | |
16695 | ||
16696 | static LONGEST | |
d521ce57 | 16697 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
16698 | { |
16699 | LONGEST retval = 0; | |
16700 | ||
c764a876 | 16701 | switch (offset_size) |
613e1657 KB |
16702 | { |
16703 | case 4: | |
fe1b8b76 | 16704 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
16705 | break; |
16706 | case 8: | |
fe1b8b76 | 16707 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
16708 | break; |
16709 | default: | |
8e65ff28 | 16710 | internal_error (__FILE__, __LINE__, |
c764a876 | 16711 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 16712 | bfd_get_filename (abfd)); |
613e1657 KB |
16713 | } |
16714 | ||
917c78fc | 16715 | return retval; |
613e1657 KB |
16716 | } |
16717 | ||
d521ce57 TT |
16718 | static const gdb_byte * |
16719 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
16720 | { |
16721 | /* If the size of a host char is 8 bits, we can return a pointer | |
16722 | to the buffer, otherwise we have to copy the data to a buffer | |
16723 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16724 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 16725 | return buf; |
c906108c SS |
16726 | } |
16727 | ||
d521ce57 TT |
16728 | static const char * |
16729 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
16730 | unsigned int *bytes_read_ptr) | |
c906108c SS |
16731 | { |
16732 | /* If the size of a host char is 8 bits, we can return a pointer | |
16733 | to the string, otherwise we have to copy the string to a buffer | |
16734 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16735 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
16736 | if (*buf == '\0') |
16737 | { | |
16738 | *bytes_read_ptr = 1; | |
16739 | return NULL; | |
16740 | } | |
d521ce57 TT |
16741 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
16742 | return (const char *) buf; | |
4bdf3d34 JJ |
16743 | } |
16744 | ||
d521ce57 | 16745 | static const char * |
cf2c3c16 | 16746 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 16747 | { |
be391dca | 16748 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 16749 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
16750 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
16751 | bfd_get_filename (abfd)); | |
dce234bc | 16752 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
16753 | error (_("DW_FORM_strp pointing outside of " |
16754 | ".debug_str section [in module %s]"), | |
16755 | bfd_get_filename (abfd)); | |
4bdf3d34 | 16756 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 16757 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 16758 | return NULL; |
d521ce57 | 16759 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
16760 | } |
16761 | ||
36586728 TT |
16762 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
16763 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
16764 | the string consists of a single NUL byte, return NULL; otherwise | |
16765 | return a pointer to the string. */ | |
16766 | ||
d521ce57 | 16767 | static const char * |
36586728 TT |
16768 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
16769 | { | |
16770 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
16771 | ||
16772 | if (dwz->str.buffer == NULL) | |
16773 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
16774 | "section [in module %s]"), | |
16775 | bfd_get_filename (dwz->dwz_bfd)); | |
16776 | if (str_offset >= dwz->str.size) | |
16777 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
16778 | ".debug_str section [in module %s]"), | |
16779 | bfd_get_filename (dwz->dwz_bfd)); | |
16780 | gdb_assert (HOST_CHAR_BIT == 8); | |
16781 | if (dwz->str.buffer[str_offset] == '\0') | |
16782 | return NULL; | |
d521ce57 | 16783 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
16784 | } |
16785 | ||
d521ce57 TT |
16786 | static const char * |
16787 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
16788 | const struct comp_unit_head *cu_header, |
16789 | unsigned int *bytes_read_ptr) | |
16790 | { | |
16791 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
16792 | ||
16793 | return read_indirect_string_at_offset (abfd, str_offset); | |
16794 | } | |
16795 | ||
12df843f | 16796 | static ULONGEST |
d521ce57 TT |
16797 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
16798 | unsigned int *bytes_read_ptr) | |
c906108c | 16799 | { |
12df843f | 16800 | ULONGEST result; |
ce5d95e1 | 16801 | unsigned int num_read; |
870f88f7 | 16802 | int shift; |
c906108c SS |
16803 | unsigned char byte; |
16804 | ||
16805 | result = 0; | |
16806 | shift = 0; | |
16807 | num_read = 0; | |
c906108c SS |
16808 | while (1) |
16809 | { | |
fe1b8b76 | 16810 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16811 | buf++; |
16812 | num_read++; | |
12df843f | 16813 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
16814 | if ((byte & 128) == 0) |
16815 | { | |
16816 | break; | |
16817 | } | |
16818 | shift += 7; | |
16819 | } | |
16820 | *bytes_read_ptr = num_read; | |
16821 | return result; | |
16822 | } | |
16823 | ||
12df843f | 16824 | static LONGEST |
d521ce57 TT |
16825 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
16826 | unsigned int *bytes_read_ptr) | |
c906108c | 16827 | { |
12df843f | 16828 | LONGEST result; |
870f88f7 | 16829 | int shift, num_read; |
c906108c SS |
16830 | unsigned char byte; |
16831 | ||
16832 | result = 0; | |
16833 | shift = 0; | |
c906108c | 16834 | num_read = 0; |
c906108c SS |
16835 | while (1) |
16836 | { | |
fe1b8b76 | 16837 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16838 | buf++; |
16839 | num_read++; | |
12df843f | 16840 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
16841 | shift += 7; |
16842 | if ((byte & 128) == 0) | |
16843 | { | |
16844 | break; | |
16845 | } | |
16846 | } | |
77e0b926 | 16847 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 16848 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
16849 | *bytes_read_ptr = num_read; |
16850 | return result; | |
16851 | } | |
16852 | ||
3019eac3 DE |
16853 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
16854 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
16855 | ADDR_SIZE is the size of addresses from the CU header. */ | |
16856 | ||
16857 | static CORE_ADDR | |
16858 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
16859 | { | |
16860 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16861 | bfd *abfd = objfile->obfd; | |
16862 | const gdb_byte *info_ptr; | |
16863 | ||
16864 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
16865 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
16866 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 16867 | objfile_name (objfile)); |
3019eac3 DE |
16868 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
16869 | error (_("DW_FORM_addr_index pointing outside of " | |
16870 | ".debug_addr section [in module %s]"), | |
4262abfb | 16871 | objfile_name (objfile)); |
3019eac3 DE |
16872 | info_ptr = (dwarf2_per_objfile->addr.buffer |
16873 | + addr_base + addr_index * addr_size); | |
16874 | if (addr_size == 4) | |
16875 | return bfd_get_32 (abfd, info_ptr); | |
16876 | else | |
16877 | return bfd_get_64 (abfd, info_ptr); | |
16878 | } | |
16879 | ||
16880 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
16881 | ||
16882 | static CORE_ADDR | |
16883 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
16884 | { | |
16885 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
16886 | } | |
16887 | ||
16888 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
16889 | ||
16890 | static CORE_ADDR | |
d521ce57 | 16891 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
16892 | unsigned int *bytes_read) |
16893 | { | |
16894 | bfd *abfd = cu->objfile->obfd; | |
16895 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
16896 | ||
16897 | return read_addr_index (cu, addr_index); | |
16898 | } | |
16899 | ||
16900 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
16901 | back to dwarf2_read_addr_index. */ | |
16902 | ||
16903 | struct dwarf2_read_addr_index_data | |
16904 | { | |
16905 | ULONGEST addr_base; | |
16906 | int addr_size; | |
16907 | }; | |
16908 | ||
16909 | /* die_reader_func for dwarf2_read_addr_index. */ | |
16910 | ||
16911 | static void | |
16912 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 16913 | const gdb_byte *info_ptr, |
3019eac3 DE |
16914 | struct die_info *comp_unit_die, |
16915 | int has_children, | |
16916 | void *data) | |
16917 | { | |
16918 | struct dwarf2_cu *cu = reader->cu; | |
16919 | struct dwarf2_read_addr_index_data *aidata = | |
16920 | (struct dwarf2_read_addr_index_data *) data; | |
16921 | ||
16922 | aidata->addr_base = cu->addr_base; | |
16923 | aidata->addr_size = cu->header.addr_size; | |
16924 | } | |
16925 | ||
16926 | /* Given an index in .debug_addr, fetch the value. | |
16927 | NOTE: This can be called during dwarf expression evaluation, | |
16928 | long after the debug information has been read, and thus per_cu->cu | |
16929 | may no longer exist. */ | |
16930 | ||
16931 | CORE_ADDR | |
16932 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
16933 | unsigned int addr_index) | |
16934 | { | |
16935 | struct objfile *objfile = per_cu->objfile; | |
16936 | struct dwarf2_cu *cu = per_cu->cu; | |
16937 | ULONGEST addr_base; | |
16938 | int addr_size; | |
16939 | ||
16940 | /* This is intended to be called from outside this file. */ | |
16941 | dw2_setup (objfile); | |
16942 | ||
16943 | /* We need addr_base and addr_size. | |
16944 | If we don't have PER_CU->cu, we have to get it. | |
16945 | Nasty, but the alternative is storing the needed info in PER_CU, | |
16946 | which at this point doesn't seem justified: it's not clear how frequently | |
16947 | it would get used and it would increase the size of every PER_CU. | |
16948 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
16949 | so we're not in uncharted territory here. | |
16950 | Alas we need to be a bit more complicated as addr_base is contained | |
16951 | in the DIE. | |
16952 | ||
16953 | We don't need to read the entire CU(/TU). | |
16954 | We just need the header and top level die. | |
a1b64ce1 | 16955 | |
3019eac3 | 16956 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 16957 | For now we skip this optimization. */ |
3019eac3 DE |
16958 | |
16959 | if (cu != NULL) | |
16960 | { | |
16961 | addr_base = cu->addr_base; | |
16962 | addr_size = cu->header.addr_size; | |
16963 | } | |
16964 | else | |
16965 | { | |
16966 | struct dwarf2_read_addr_index_data aidata; | |
16967 | ||
a1b64ce1 DE |
16968 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
16969 | we need addr_base. */ | |
16970 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
16971 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
16972 | addr_base = aidata.addr_base; |
16973 | addr_size = aidata.addr_size; | |
16974 | } | |
16975 | ||
16976 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
16977 | } | |
16978 | ||
57d63ce2 DE |
16979 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
16980 | This is only used by the Fission support. */ | |
3019eac3 | 16981 | |
d521ce57 | 16982 | static const char * |
342587c4 | 16983 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
16984 | { |
16985 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 16986 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 16987 | bfd *abfd = objfile->obfd; |
342587c4 | 16988 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
16989 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
16990 | struct dwarf2_section_info *str_offsets_section = | |
16991 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 16992 | const gdb_byte *info_ptr; |
3019eac3 | 16993 | ULONGEST str_offset; |
57d63ce2 | 16994 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 16995 | |
73869dc2 DE |
16996 | dwarf2_read_section (objfile, str_section); |
16997 | dwarf2_read_section (objfile, str_offsets_section); | |
16998 | if (str_section->buffer == NULL) | |
57d63ce2 | 16999 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 17000 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 17001 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17002 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 17003 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 17004 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 17005 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17006 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 17007 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 17008 | " section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 17009 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17010 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
17011 | + str_index * cu->header.offset_size); |
17012 | if (cu->header.offset_size == 4) | |
17013 | str_offset = bfd_get_32 (abfd, info_ptr); | |
17014 | else | |
17015 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 17016 | if (str_offset >= str_section->size) |
57d63ce2 | 17017 | error (_("Offset from %s pointing outside of" |
3019eac3 | 17018 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 17019 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17020 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
17021 | } |
17022 | ||
3019eac3 DE |
17023 | /* Return the length of an LEB128 number in BUF. */ |
17024 | ||
17025 | static int | |
17026 | leb128_size (const gdb_byte *buf) | |
17027 | { | |
17028 | const gdb_byte *begin = buf; | |
17029 | gdb_byte byte; | |
17030 | ||
17031 | while (1) | |
17032 | { | |
17033 | byte = *buf++; | |
17034 | if ((byte & 128) == 0) | |
17035 | return buf - begin; | |
17036 | } | |
17037 | } | |
17038 | ||
c906108c | 17039 | static void |
e142c38c | 17040 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
17041 | { |
17042 | switch (lang) | |
17043 | { | |
17044 | case DW_LANG_C89: | |
76bee0cc | 17045 | case DW_LANG_C99: |
0cfd832f | 17046 | case DW_LANG_C11: |
c906108c | 17047 | case DW_LANG_C: |
d1be3247 | 17048 | case DW_LANG_UPC: |
e142c38c | 17049 | cu->language = language_c; |
c906108c | 17050 | break; |
9c37b5ae | 17051 | case DW_LANG_Java: |
c906108c | 17052 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
17053 | case DW_LANG_C_plus_plus_11: |
17054 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 17055 | cu->language = language_cplus; |
c906108c | 17056 | break; |
6aecb9c2 JB |
17057 | case DW_LANG_D: |
17058 | cu->language = language_d; | |
17059 | break; | |
c906108c SS |
17060 | case DW_LANG_Fortran77: |
17061 | case DW_LANG_Fortran90: | |
b21b22e0 | 17062 | case DW_LANG_Fortran95: |
f7de9aab MW |
17063 | case DW_LANG_Fortran03: |
17064 | case DW_LANG_Fortran08: | |
e142c38c | 17065 | cu->language = language_fortran; |
c906108c | 17066 | break; |
a766d390 DE |
17067 | case DW_LANG_Go: |
17068 | cu->language = language_go; | |
17069 | break; | |
c906108c | 17070 | case DW_LANG_Mips_Assembler: |
e142c38c | 17071 | cu->language = language_asm; |
c906108c SS |
17072 | break; |
17073 | case DW_LANG_Ada83: | |
8aaf0b47 | 17074 | case DW_LANG_Ada95: |
bc5f45f8 JB |
17075 | cu->language = language_ada; |
17076 | break; | |
72019c9c GM |
17077 | case DW_LANG_Modula2: |
17078 | cu->language = language_m2; | |
17079 | break; | |
fe8e67fd PM |
17080 | case DW_LANG_Pascal83: |
17081 | cu->language = language_pascal; | |
17082 | break; | |
22566fbd DJ |
17083 | case DW_LANG_ObjC: |
17084 | cu->language = language_objc; | |
17085 | break; | |
c44af4eb TT |
17086 | case DW_LANG_Rust: |
17087 | case DW_LANG_Rust_old: | |
17088 | cu->language = language_rust; | |
17089 | break; | |
c906108c SS |
17090 | case DW_LANG_Cobol74: |
17091 | case DW_LANG_Cobol85: | |
c906108c | 17092 | default: |
e142c38c | 17093 | cu->language = language_minimal; |
c906108c SS |
17094 | break; |
17095 | } | |
e142c38c | 17096 | cu->language_defn = language_def (cu->language); |
c906108c SS |
17097 | } |
17098 | ||
17099 | /* Return the named attribute or NULL if not there. */ | |
17100 | ||
17101 | static struct attribute * | |
e142c38c | 17102 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 17103 | { |
a48e046c | 17104 | for (;;) |
c906108c | 17105 | { |
a48e046c TT |
17106 | unsigned int i; |
17107 | struct attribute *spec = NULL; | |
17108 | ||
17109 | for (i = 0; i < die->num_attrs; ++i) | |
17110 | { | |
17111 | if (die->attrs[i].name == name) | |
17112 | return &die->attrs[i]; | |
17113 | if (die->attrs[i].name == DW_AT_specification | |
17114 | || die->attrs[i].name == DW_AT_abstract_origin) | |
17115 | spec = &die->attrs[i]; | |
17116 | } | |
17117 | ||
17118 | if (!spec) | |
17119 | break; | |
c906108c | 17120 | |
f2f0e013 | 17121 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 17122 | } |
c5aa993b | 17123 | |
c906108c SS |
17124 | return NULL; |
17125 | } | |
17126 | ||
348e048f DE |
17127 | /* Return the named attribute or NULL if not there, |
17128 | but do not follow DW_AT_specification, etc. | |
17129 | This is for use in contexts where we're reading .debug_types dies. | |
17130 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
17131 | back up the chain, and we want to go down. */ | |
17132 | ||
17133 | static struct attribute * | |
45e58e77 | 17134 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
17135 | { |
17136 | unsigned int i; | |
17137 | ||
17138 | for (i = 0; i < die->num_attrs; ++i) | |
17139 | if (die->attrs[i].name == name) | |
17140 | return &die->attrs[i]; | |
17141 | ||
17142 | return NULL; | |
17143 | } | |
17144 | ||
7d45c7c3 KB |
17145 | /* Return the string associated with a string-typed attribute, or NULL if it |
17146 | is either not found or is of an incorrect type. */ | |
17147 | ||
17148 | static const char * | |
17149 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
17150 | { | |
17151 | struct attribute *attr; | |
17152 | const char *str = NULL; | |
17153 | ||
17154 | attr = dwarf2_attr (die, name, cu); | |
17155 | ||
17156 | if (attr != NULL) | |
17157 | { | |
17158 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_string | |
17159 | || attr->form == DW_FORM_GNU_strp_alt) | |
17160 | str = DW_STRING (attr); | |
17161 | else | |
17162 | complaint (&symfile_complaints, | |
17163 | _("string type expected for attribute %s for " | |
17164 | "DIE at 0x%x in module %s"), | |
17165 | dwarf_attr_name (name), die->offset.sect_off, | |
17166 | objfile_name (cu->objfile)); | |
17167 | } | |
17168 | ||
17169 | return str; | |
17170 | } | |
17171 | ||
05cf31d1 JB |
17172 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
17173 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 17174 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
17175 | |
17176 | static int | |
17177 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
17178 | { | |
17179 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
17180 | ||
17181 | return (attr && DW_UNSND (attr)); | |
17182 | } | |
17183 | ||
3ca72b44 | 17184 | static int |
e142c38c | 17185 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 17186 | { |
05cf31d1 JB |
17187 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
17188 | which value is non-zero. However, we have to be careful with | |
17189 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
17190 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
17191 | end up accidently finding a declaration attribute that belongs | |
17192 | to a different DIE referenced by the specification attribute, | |
17193 | even though the given DIE does not have a declaration attribute. */ | |
17194 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
17195 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
17196 | } |
17197 | ||
63d06c5c | 17198 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 17199 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
17200 | containing the return value on output. If there is no |
17201 | specification, but there is an abstract origin, that is | |
17202 | returned. */ | |
63d06c5c DC |
17203 | |
17204 | static struct die_info * | |
f2f0e013 | 17205 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 17206 | { |
f2f0e013 DJ |
17207 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
17208 | *spec_cu); | |
63d06c5c | 17209 | |
edb3359d DJ |
17210 | if (spec_attr == NULL) |
17211 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
17212 | ||
63d06c5c DC |
17213 | if (spec_attr == NULL) |
17214 | return NULL; | |
17215 | else | |
f2f0e013 | 17216 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 17217 | } |
c906108c | 17218 | |
debd256d | 17219 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
17220 | refers to. |
17221 | NOTE: This is also used as a "cleanup" function. */ | |
17222 | ||
debd256d JB |
17223 | static void |
17224 | free_line_header (struct line_header *lh) | |
17225 | { | |
17226 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 17227 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
17228 | |
17229 | /* Remember that all the lh->file_names[i].name pointers are | |
17230 | pointers into debug_line_buffer, and don't need to be freed. */ | |
17231 | if (lh->file_names) | |
a8bc7b56 | 17232 | xfree (lh->file_names); |
debd256d JB |
17233 | |
17234 | /* Similarly for the include directory names. */ | |
17235 | if (lh->include_dirs) | |
a8bc7b56 | 17236 | xfree (lh->include_dirs); |
debd256d | 17237 | |
a8bc7b56 | 17238 | xfree (lh); |
debd256d JB |
17239 | } |
17240 | ||
527f3840 JK |
17241 | /* Stub for free_line_header to match void * callback types. */ |
17242 | ||
17243 | static void | |
17244 | free_line_header_voidp (void *arg) | |
17245 | { | |
9a3c8263 | 17246 | struct line_header *lh = (struct line_header *) arg; |
527f3840 JK |
17247 | |
17248 | free_line_header (lh); | |
17249 | } | |
17250 | ||
debd256d | 17251 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 17252 | |
debd256d | 17253 | static void |
d521ce57 | 17254 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 17255 | { |
27e0867f DE |
17256 | if (dwarf_line_debug >= 2) |
17257 | fprintf_unfiltered (gdb_stdlog, "Adding dir %u: %s\n", | |
17258 | lh->num_include_dirs + 1, include_dir); | |
17259 | ||
debd256d JB |
17260 | /* Grow the array if necessary. */ |
17261 | if (lh->include_dirs_size == 0) | |
c5aa993b | 17262 | { |
debd256d | 17263 | lh->include_dirs_size = 1; /* for testing */ |
8d749320 | 17264 | lh->include_dirs = XNEWVEC (const char *, lh->include_dirs_size); |
debd256d JB |
17265 | } |
17266 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
17267 | { | |
17268 | lh->include_dirs_size *= 2; | |
8d749320 SM |
17269 | lh->include_dirs = XRESIZEVEC (const char *, lh->include_dirs, |
17270 | lh->include_dirs_size); | |
c5aa993b | 17271 | } |
c906108c | 17272 | |
debd256d JB |
17273 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
17274 | } | |
6e70227d | 17275 | |
debd256d | 17276 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 17277 | |
debd256d JB |
17278 | static void |
17279 | add_file_name (struct line_header *lh, | |
d521ce57 | 17280 | const char *name, |
debd256d JB |
17281 | unsigned int dir_index, |
17282 | unsigned int mod_time, | |
17283 | unsigned int length) | |
17284 | { | |
17285 | struct file_entry *fe; | |
17286 | ||
27e0867f DE |
17287 | if (dwarf_line_debug >= 2) |
17288 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
17289 | lh->num_file_names + 1, name); | |
17290 | ||
debd256d JB |
17291 | /* Grow the array if necessary. */ |
17292 | if (lh->file_names_size == 0) | |
17293 | { | |
17294 | lh->file_names_size = 1; /* for testing */ | |
8d749320 | 17295 | lh->file_names = XNEWVEC (struct file_entry, lh->file_names_size); |
debd256d JB |
17296 | } |
17297 | else if (lh->num_file_names >= lh->file_names_size) | |
17298 | { | |
17299 | lh->file_names_size *= 2; | |
224c3ddb SM |
17300 | lh->file_names |
17301 | = XRESIZEVEC (struct file_entry, lh->file_names, lh->file_names_size); | |
debd256d JB |
17302 | } |
17303 | ||
17304 | fe = &lh->file_names[lh->num_file_names++]; | |
17305 | fe->name = name; | |
17306 | fe->dir_index = dir_index; | |
17307 | fe->mod_time = mod_time; | |
17308 | fe->length = length; | |
aaa75496 | 17309 | fe->included_p = 0; |
cb1df416 | 17310 | fe->symtab = NULL; |
debd256d | 17311 | } |
6e70227d | 17312 | |
83769d0b | 17313 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
17314 | |
17315 | static struct dwarf2_section_info * | |
17316 | get_debug_line_section (struct dwarf2_cu *cu) | |
17317 | { | |
17318 | struct dwarf2_section_info *section; | |
17319 | ||
17320 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
17321 | DWO file. */ | |
17322 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
17323 | section = &cu->dwo_unit->dwo_file->sections.line; | |
17324 | else if (cu->per_cu->is_dwz) | |
17325 | { | |
17326 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17327 | ||
17328 | section = &dwz->line; | |
17329 | } | |
17330 | else | |
17331 | section = &dwarf2_per_objfile->line; | |
17332 | ||
17333 | return section; | |
17334 | } | |
17335 | ||
debd256d | 17336 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 17337 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 17338 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
17339 | Returns NULL if there is a problem reading the header, e.g., if it |
17340 | has a version we don't understand. | |
debd256d JB |
17341 | |
17342 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
17343 | the returned object point into the dwarf line section buffer, |
17344 | and must not be freed. */ | |
ae2de4f8 | 17345 | |
debd256d | 17346 | static struct line_header * |
3019eac3 | 17347 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
17348 | { |
17349 | struct cleanup *back_to; | |
17350 | struct line_header *lh; | |
d521ce57 | 17351 | const gdb_byte *line_ptr; |
c764a876 | 17352 | unsigned int bytes_read, offset_size; |
debd256d | 17353 | int i; |
d521ce57 | 17354 | const char *cur_dir, *cur_file; |
3019eac3 DE |
17355 | struct dwarf2_section_info *section; |
17356 | bfd *abfd; | |
17357 | ||
36586728 | 17358 | section = get_debug_line_section (cu); |
3019eac3 DE |
17359 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
17360 | if (section->buffer == NULL) | |
debd256d | 17361 | { |
3019eac3 DE |
17362 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
17363 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
17364 | else | |
17365 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
17366 | return 0; |
17367 | } | |
17368 | ||
fceca515 DE |
17369 | /* We can't do this until we know the section is non-empty. |
17370 | Only then do we know we have such a section. */ | |
a32a8923 | 17371 | abfd = get_section_bfd_owner (section); |
fceca515 | 17372 | |
a738430d MK |
17373 | /* Make sure that at least there's room for the total_length field. |
17374 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 17375 | if (offset + 4 >= section->size) |
debd256d | 17376 | { |
4d3c2250 | 17377 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
17378 | return 0; |
17379 | } | |
17380 | ||
8d749320 | 17381 | lh = XNEW (struct line_header); |
debd256d JB |
17382 | memset (lh, 0, sizeof (*lh)); |
17383 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
17384 | (void *) lh); | |
17385 | ||
527f3840 JK |
17386 | lh->offset.sect_off = offset; |
17387 | lh->offset_in_dwz = cu->per_cu->is_dwz; | |
17388 | ||
3019eac3 | 17389 | line_ptr = section->buffer + offset; |
debd256d | 17390 | |
a738430d | 17391 | /* Read in the header. */ |
6e70227d | 17392 | lh->total_length = |
c764a876 DE |
17393 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
17394 | &bytes_read, &offset_size); | |
debd256d | 17395 | line_ptr += bytes_read; |
3019eac3 | 17396 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 17397 | { |
4d3c2250 | 17398 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 17399 | do_cleanups (back_to); |
debd256d JB |
17400 | return 0; |
17401 | } | |
17402 | lh->statement_program_end = line_ptr + lh->total_length; | |
17403 | lh->version = read_2_bytes (abfd, line_ptr); | |
17404 | line_ptr += 2; | |
cd366ee8 DE |
17405 | if (lh->version > 4) |
17406 | { | |
17407 | /* This is a version we don't understand. The format could have | |
17408 | changed in ways we don't handle properly so just punt. */ | |
17409 | complaint (&symfile_complaints, | |
17410 | _("unsupported version in .debug_line section")); | |
17411 | return NULL; | |
17412 | } | |
c764a876 DE |
17413 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
17414 | line_ptr += offset_size; | |
debd256d JB |
17415 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
17416 | line_ptr += 1; | |
2dc7f7b3 TT |
17417 | if (lh->version >= 4) |
17418 | { | |
17419 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
17420 | line_ptr += 1; | |
17421 | } | |
17422 | else | |
17423 | lh->maximum_ops_per_instruction = 1; | |
17424 | ||
17425 | if (lh->maximum_ops_per_instruction == 0) | |
17426 | { | |
17427 | lh->maximum_ops_per_instruction = 1; | |
17428 | complaint (&symfile_complaints, | |
3e43a32a MS |
17429 | _("invalid maximum_ops_per_instruction " |
17430 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
17431 | } |
17432 | ||
debd256d JB |
17433 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
17434 | line_ptr += 1; | |
17435 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
17436 | line_ptr += 1; | |
17437 | lh->line_range = read_1_byte (abfd, line_ptr); | |
17438 | line_ptr += 1; | |
17439 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
17440 | line_ptr += 1; | |
8d749320 | 17441 | lh->standard_opcode_lengths = XNEWVEC (unsigned char, lh->opcode_base); |
debd256d JB |
17442 | |
17443 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
17444 | for (i = 1; i < lh->opcode_base; ++i) | |
17445 | { | |
17446 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
17447 | line_ptr += 1; | |
17448 | } | |
17449 | ||
a738430d | 17450 | /* Read directory table. */ |
9b1c24c8 | 17451 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17452 | { |
17453 | line_ptr += bytes_read; | |
17454 | add_include_dir (lh, cur_dir); | |
17455 | } | |
17456 | line_ptr += bytes_read; | |
17457 | ||
a738430d | 17458 | /* Read file name table. */ |
9b1c24c8 | 17459 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17460 | { |
17461 | unsigned int dir_index, mod_time, length; | |
17462 | ||
17463 | line_ptr += bytes_read; | |
17464 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17465 | line_ptr += bytes_read; | |
17466 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17467 | line_ptr += bytes_read; | |
17468 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17469 | line_ptr += bytes_read; | |
17470 | ||
17471 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17472 | } | |
17473 | line_ptr += bytes_read; | |
6e70227d | 17474 | lh->statement_program_start = line_ptr; |
debd256d | 17475 | |
3019eac3 | 17476 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 17477 | complaint (&symfile_complaints, |
3e43a32a MS |
17478 | _("line number info header doesn't " |
17479 | "fit in `.debug_line' section")); | |
debd256d JB |
17480 | |
17481 | discard_cleanups (back_to); | |
17482 | return lh; | |
17483 | } | |
c906108c | 17484 | |
c6da4cef DE |
17485 | /* Subroutine of dwarf_decode_lines to simplify it. |
17486 | Return the file name of the psymtab for included file FILE_INDEX | |
17487 | in line header LH of PST. | |
17488 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17489 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
17490 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
17491 | ||
17492 | The function creates dangling cleanup registration. */ | |
c6da4cef | 17493 | |
d521ce57 | 17494 | static const char * |
c6da4cef DE |
17495 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
17496 | const struct partial_symtab *pst, | |
17497 | const char *comp_dir) | |
17498 | { | |
17499 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
17500 | const char *include_name = fe.name; |
17501 | const char *include_name_to_compare = include_name; | |
17502 | const char *dir_name = NULL; | |
72b9f47f TT |
17503 | const char *pst_filename; |
17504 | char *copied_name = NULL; | |
c6da4cef DE |
17505 | int file_is_pst; |
17506 | ||
afa6c9ab | 17507 | if (fe.dir_index && lh->include_dirs != NULL) |
c6da4cef DE |
17508 | dir_name = lh->include_dirs[fe.dir_index - 1]; |
17509 | ||
17510 | if (!IS_ABSOLUTE_PATH (include_name) | |
17511 | && (dir_name != NULL || comp_dir != NULL)) | |
17512 | { | |
17513 | /* Avoid creating a duplicate psymtab for PST. | |
17514 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
17515 | Before we do the comparison, however, we need to account | |
17516 | for DIR_NAME and COMP_DIR. | |
17517 | First prepend dir_name (if non-NULL). If we still don't | |
17518 | have an absolute path prepend comp_dir (if non-NULL). | |
17519 | However, the directory we record in the include-file's | |
17520 | psymtab does not contain COMP_DIR (to match the | |
17521 | corresponding symtab(s)). | |
17522 | ||
17523 | Example: | |
17524 | ||
17525 | bash$ cd /tmp | |
17526 | bash$ gcc -g ./hello.c | |
17527 | include_name = "hello.c" | |
17528 | dir_name = "." | |
17529 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
17530 | DW_AT_name = "./hello.c" |
17531 | ||
17532 | */ | |
c6da4cef DE |
17533 | |
17534 | if (dir_name != NULL) | |
17535 | { | |
d521ce57 TT |
17536 | char *tem = concat (dir_name, SLASH_STRING, |
17537 | include_name, (char *)NULL); | |
17538 | ||
17539 | make_cleanup (xfree, tem); | |
17540 | include_name = tem; | |
c6da4cef | 17541 | include_name_to_compare = include_name; |
c6da4cef DE |
17542 | } |
17543 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
17544 | { | |
d521ce57 TT |
17545 | char *tem = concat (comp_dir, SLASH_STRING, |
17546 | include_name, (char *)NULL); | |
17547 | ||
17548 | make_cleanup (xfree, tem); | |
17549 | include_name_to_compare = tem; | |
c6da4cef DE |
17550 | } |
17551 | } | |
17552 | ||
17553 | pst_filename = pst->filename; | |
17554 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
17555 | { | |
72b9f47f TT |
17556 | copied_name = concat (pst->dirname, SLASH_STRING, |
17557 | pst_filename, (char *)NULL); | |
17558 | pst_filename = copied_name; | |
c6da4cef DE |
17559 | } |
17560 | ||
1e3fad37 | 17561 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 17562 | |
72b9f47f TT |
17563 | if (copied_name != NULL) |
17564 | xfree (copied_name); | |
c6da4cef DE |
17565 | |
17566 | if (file_is_pst) | |
17567 | return NULL; | |
17568 | return include_name; | |
17569 | } | |
17570 | ||
d9b3de22 DE |
17571 | /* State machine to track the state of the line number program. */ |
17572 | ||
17573 | typedef struct | |
17574 | { | |
17575 | /* These are part of the standard DWARF line number state machine. */ | |
17576 | ||
17577 | unsigned char op_index; | |
17578 | unsigned int file; | |
17579 | unsigned int line; | |
17580 | CORE_ADDR address; | |
17581 | int is_stmt; | |
17582 | unsigned int discriminator; | |
17583 | ||
17584 | /* Additional bits of state we need to track. */ | |
17585 | ||
17586 | /* The last file that we called dwarf2_start_subfile for. | |
17587 | This is only used for TLLs. */ | |
17588 | unsigned int last_file; | |
17589 | /* The last file a line number was recorded for. */ | |
17590 | struct subfile *last_subfile; | |
17591 | ||
17592 | /* The function to call to record a line. */ | |
17593 | record_line_ftype *record_line; | |
17594 | ||
17595 | /* The last line number that was recorded, used to coalesce | |
17596 | consecutive entries for the same line. This can happen, for | |
17597 | example, when discriminators are present. PR 17276. */ | |
17598 | unsigned int last_line; | |
17599 | int line_has_non_zero_discriminator; | |
17600 | } lnp_state_machine; | |
17601 | ||
17602 | /* There's a lot of static state to pass to dwarf_record_line. | |
17603 | This keeps it all together. */ | |
17604 | ||
17605 | typedef struct | |
17606 | { | |
17607 | /* The gdbarch. */ | |
17608 | struct gdbarch *gdbarch; | |
17609 | ||
17610 | /* The line number header. */ | |
17611 | struct line_header *line_header; | |
17612 | ||
17613 | /* Non-zero if we're recording lines. | |
17614 | Otherwise we're building partial symtabs and are just interested in | |
17615 | finding include files mentioned by the line number program. */ | |
17616 | int record_lines_p; | |
17617 | } lnp_reader_state; | |
17618 | ||
c91513d8 PP |
17619 | /* Ignore this record_line request. */ |
17620 | ||
17621 | static void | |
17622 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
17623 | { | |
17624 | return; | |
17625 | } | |
17626 | ||
a05a36a5 DE |
17627 | /* Return non-zero if we should add LINE to the line number table. |
17628 | LINE is the line to add, LAST_LINE is the last line that was added, | |
17629 | LAST_SUBFILE is the subfile for LAST_LINE. | |
17630 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
17631 | had a non-zero discriminator. | |
17632 | ||
17633 | We have to be careful in the presence of discriminators. | |
17634 | E.g., for this line: | |
17635 | ||
17636 | for (i = 0; i < 100000; i++); | |
17637 | ||
17638 | clang can emit four line number entries for that one line, | |
17639 | each with a different discriminator. | |
17640 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
17641 | ||
17642 | However, we want gdb to coalesce all four entries into one. | |
17643 | Otherwise the user could stepi into the middle of the line and | |
17644 | gdb would get confused about whether the pc really was in the | |
17645 | middle of the line. | |
17646 | ||
17647 | Things are further complicated by the fact that two consecutive | |
17648 | line number entries for the same line is a heuristic used by gcc | |
17649 | to denote the end of the prologue. So we can't just discard duplicate | |
17650 | entries, we have to be selective about it. The heuristic we use is | |
17651 | that we only collapse consecutive entries for the same line if at least | |
17652 | one of those entries has a non-zero discriminator. PR 17276. | |
17653 | ||
17654 | Note: Addresses in the line number state machine can never go backwards | |
17655 | within one sequence, thus this coalescing is ok. */ | |
17656 | ||
17657 | static int | |
17658 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
17659 | int line_has_non_zero_discriminator, | |
17660 | struct subfile *last_subfile) | |
17661 | { | |
17662 | if (current_subfile != last_subfile) | |
17663 | return 1; | |
17664 | if (line != last_line) | |
17665 | return 1; | |
17666 | /* Same line for the same file that we've seen already. | |
17667 | As a last check, for pr 17276, only record the line if the line | |
17668 | has never had a non-zero discriminator. */ | |
17669 | if (!line_has_non_zero_discriminator) | |
17670 | return 1; | |
17671 | return 0; | |
17672 | } | |
17673 | ||
252a6764 DE |
17674 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
17675 | in the line table of subfile SUBFILE. */ | |
17676 | ||
17677 | static void | |
d9b3de22 DE |
17678 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
17679 | unsigned int line, CORE_ADDR address, | |
17680 | record_line_ftype p_record_line) | |
252a6764 DE |
17681 | { |
17682 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17683 | ||
27e0867f DE |
17684 | if (dwarf_line_debug) |
17685 | { | |
17686 | fprintf_unfiltered (gdb_stdlog, | |
17687 | "Recording line %u, file %s, address %s\n", | |
17688 | line, lbasename (subfile->name), | |
17689 | paddress (gdbarch, address)); | |
17690 | } | |
17691 | ||
d5962de5 | 17692 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
17693 | } |
17694 | ||
17695 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
17696 | Mark the end of a set of line number records. | |
d9b3de22 | 17697 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
17698 | If SUBFILE is NULL the request is ignored. */ |
17699 | ||
17700 | static void | |
17701 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
17702 | CORE_ADDR address, record_line_ftype p_record_line) | |
17703 | { | |
27e0867f DE |
17704 | if (subfile == NULL) |
17705 | return; | |
17706 | ||
17707 | if (dwarf_line_debug) | |
17708 | { | |
17709 | fprintf_unfiltered (gdb_stdlog, | |
17710 | "Finishing current line, file %s, address %s\n", | |
17711 | lbasename (subfile->name), | |
17712 | paddress (gdbarch, address)); | |
17713 | } | |
17714 | ||
d9b3de22 DE |
17715 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
17716 | } | |
17717 | ||
17718 | /* Record the line in STATE. | |
17719 | END_SEQUENCE is non-zero if we're processing the end of a sequence. */ | |
17720 | ||
17721 | static void | |
17722 | dwarf_record_line (lnp_reader_state *reader, lnp_state_machine *state, | |
17723 | int end_sequence) | |
17724 | { | |
17725 | const struct line_header *lh = reader->line_header; | |
17726 | unsigned int file, line, discriminator; | |
17727 | int is_stmt; | |
17728 | ||
17729 | file = state->file; | |
17730 | line = state->line; | |
17731 | is_stmt = state->is_stmt; | |
17732 | discriminator = state->discriminator; | |
17733 | ||
17734 | if (dwarf_line_debug) | |
17735 | { | |
17736 | fprintf_unfiltered (gdb_stdlog, | |
17737 | "Processing actual line %u: file %u," | |
17738 | " address %s, is_stmt %u, discrim %u\n", | |
17739 | line, file, | |
17740 | paddress (reader->gdbarch, state->address), | |
17741 | is_stmt, discriminator); | |
17742 | } | |
17743 | ||
17744 | if (file == 0 || file - 1 >= lh->num_file_names) | |
17745 | dwarf2_debug_line_missing_file_complaint (); | |
17746 | /* For now we ignore lines not starting on an instruction boundary. | |
17747 | But not when processing end_sequence for compatibility with the | |
17748 | previous version of the code. */ | |
17749 | else if (state->op_index == 0 || end_sequence) | |
17750 | { | |
17751 | lh->file_names[file - 1].included_p = 1; | |
17752 | if (reader->record_lines_p && is_stmt) | |
17753 | { | |
e815d2d2 | 17754 | if (state->last_subfile != current_subfile || end_sequence) |
d9b3de22 DE |
17755 | { |
17756 | dwarf_finish_line (reader->gdbarch, state->last_subfile, | |
17757 | state->address, state->record_line); | |
17758 | } | |
17759 | ||
17760 | if (!end_sequence) | |
17761 | { | |
17762 | if (dwarf_record_line_p (line, state->last_line, | |
17763 | state->line_has_non_zero_discriminator, | |
17764 | state->last_subfile)) | |
17765 | { | |
17766 | dwarf_record_line_1 (reader->gdbarch, current_subfile, | |
17767 | line, state->address, | |
17768 | state->record_line); | |
17769 | } | |
17770 | state->last_subfile = current_subfile; | |
17771 | state->last_line = line; | |
17772 | } | |
17773 | } | |
17774 | } | |
17775 | } | |
17776 | ||
17777 | /* Initialize STATE for the start of a line number program. */ | |
17778 | ||
17779 | static void | |
17780 | init_lnp_state_machine (lnp_state_machine *state, | |
17781 | const lnp_reader_state *reader) | |
17782 | { | |
17783 | memset (state, 0, sizeof (*state)); | |
17784 | ||
17785 | /* Just starting, there is no "last file". */ | |
17786 | state->last_file = 0; | |
17787 | state->last_subfile = NULL; | |
17788 | ||
17789 | state->record_line = record_line; | |
17790 | ||
17791 | state->last_line = 0; | |
17792 | state->line_has_non_zero_discriminator = 0; | |
17793 | ||
17794 | /* Initialize these according to the DWARF spec. */ | |
17795 | state->op_index = 0; | |
17796 | state->file = 1; | |
17797 | state->line = 1; | |
17798 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there | |
17799 | was a line entry for it so that the backend has a chance to adjust it | |
17800 | and also record it in case it needs it. This is currently used by MIPS | |
17801 | code, cf. `mips_adjust_dwarf2_line'. */ | |
17802 | state->address = gdbarch_adjust_dwarf2_line (reader->gdbarch, 0, 0); | |
17803 | state->is_stmt = reader->line_header->default_is_stmt; | |
17804 | state->discriminator = 0; | |
252a6764 DE |
17805 | } |
17806 | ||
924c2928 DE |
17807 | /* Check address and if invalid nop-out the rest of the lines in this |
17808 | sequence. */ | |
17809 | ||
17810 | static void | |
d9b3de22 | 17811 | check_line_address (struct dwarf2_cu *cu, lnp_state_machine *state, |
924c2928 DE |
17812 | const gdb_byte *line_ptr, |
17813 | CORE_ADDR lowpc, CORE_ADDR address) | |
17814 | { | |
17815 | /* If address < lowpc then it's not a usable value, it's outside the | |
17816 | pc range of the CU. However, we restrict the test to only address | |
17817 | values of zero to preserve GDB's previous behaviour which is to | |
17818 | handle the specific case of a function being GC'd by the linker. */ | |
17819 | ||
17820 | if (address == 0 && address < lowpc) | |
17821 | { | |
17822 | /* This line table is for a function which has been | |
17823 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
17824 | ||
17825 | struct objfile *objfile = cu->objfile; | |
17826 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
17827 | ||
17828 | complaint (&symfile_complaints, | |
17829 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
17830 | line_offset, objfile_name (objfile)); | |
d9b3de22 DE |
17831 | state->record_line = noop_record_line; |
17832 | /* Note: sm.record_line is left as noop_record_line | |
924c2928 DE |
17833 | until we see DW_LNE_end_sequence. */ |
17834 | } | |
17835 | } | |
17836 | ||
f3f5162e | 17837 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
17838 | Process the line number information in LH. |
17839 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
17840 | program in order to set included_p for every referenced header. */ | |
debd256d | 17841 | |
c906108c | 17842 | static void |
43f3e411 DE |
17843 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
17844 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 17845 | { |
d521ce57 TT |
17846 | const gdb_byte *line_ptr, *extended_end; |
17847 | const gdb_byte *line_end; | |
a8c50c1f | 17848 | unsigned int bytes_read, extended_len; |
699ca60a | 17849 | unsigned char op_code, extended_op; |
e142c38c DJ |
17850 | CORE_ADDR baseaddr; |
17851 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 17852 | bfd *abfd = objfile->obfd; |
fbf65064 | 17853 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
d9b3de22 DE |
17854 | /* Non-zero if we're recording line info (as opposed to building partial |
17855 | symtabs). */ | |
17856 | int record_lines_p = !decode_for_pst_p; | |
17857 | /* A collection of things we need to pass to dwarf_record_line. */ | |
17858 | lnp_reader_state reader_state; | |
e142c38c DJ |
17859 | |
17860 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17861 | |
debd256d JB |
17862 | line_ptr = lh->statement_program_start; |
17863 | line_end = lh->statement_program_end; | |
c906108c | 17864 | |
d9b3de22 DE |
17865 | reader_state.gdbarch = gdbarch; |
17866 | reader_state.line_header = lh; | |
17867 | reader_state.record_lines_p = record_lines_p; | |
17868 | ||
c906108c SS |
17869 | /* Read the statement sequences until there's nothing left. */ |
17870 | while (line_ptr < line_end) | |
17871 | { | |
d9b3de22 DE |
17872 | /* The DWARF line number program state machine. */ |
17873 | lnp_state_machine state_machine; | |
c906108c | 17874 | int end_sequence = 0; |
d9b3de22 DE |
17875 | |
17876 | /* Reset the state machine at the start of each sequence. */ | |
17877 | init_lnp_state_machine (&state_machine, &reader_state); | |
17878 | ||
17879 | if (record_lines_p && lh->num_file_names >= state_machine.file) | |
c906108c | 17880 | { |
aaa75496 | 17881 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
17882 | /* lh->include_dirs and lh->file_names are 0-based, but the |
17883 | directory and file name numbers in the statement program | |
17884 | are 1-based. */ | |
d9b3de22 | 17885 | struct file_entry *fe = &lh->file_names[state_machine.file - 1]; |
d521ce57 | 17886 | const char *dir = NULL; |
a738430d | 17887 | |
afa6c9ab | 17888 | if (fe->dir_index && lh->include_dirs != NULL) |
debd256d | 17889 | dir = lh->include_dirs[fe->dir_index - 1]; |
4f1520fb | 17890 | |
4d663531 | 17891 | dwarf2_start_subfile (fe->name, dir); |
c906108c SS |
17892 | } |
17893 | ||
a738430d | 17894 | /* Decode the table. */ |
d9b3de22 | 17895 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
17896 | { |
17897 | op_code = read_1_byte (abfd, line_ptr); | |
17898 | line_ptr += 1; | |
9aa1fe7e | 17899 | |
debd256d | 17900 | if (op_code >= lh->opcode_base) |
6e70227d | 17901 | { |
8e07a239 | 17902 | /* Special opcode. */ |
699ca60a | 17903 | unsigned char adj_opcode; |
3e29f34a | 17904 | CORE_ADDR addr_adj; |
a05a36a5 | 17905 | int line_delta; |
8e07a239 | 17906 | |
debd256d | 17907 | adj_opcode = op_code - lh->opcode_base; |
d9b3de22 DE |
17908 | addr_adj = (((state_machine.op_index |
17909 | + (adj_opcode / lh->line_range)) | |
2dc7f7b3 TT |
17910 | / lh->maximum_ops_per_instruction) |
17911 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
17912 | state_machine.address |
17913 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
17914 | state_machine.op_index = ((state_machine.op_index | |
17915 | + (adj_opcode / lh->line_range)) | |
17916 | % lh->maximum_ops_per_instruction); | |
a05a36a5 | 17917 | line_delta = lh->line_base + (adj_opcode % lh->line_range); |
d9b3de22 | 17918 | state_machine.line += line_delta; |
a05a36a5 | 17919 | if (line_delta != 0) |
d9b3de22 DE |
17920 | state_machine.line_has_non_zero_discriminator |
17921 | = state_machine.discriminator != 0; | |
17922 | ||
17923 | dwarf_record_line (&reader_state, &state_machine, 0); | |
17924 | state_machine.discriminator = 0; | |
9aa1fe7e GK |
17925 | } |
17926 | else switch (op_code) | |
c906108c SS |
17927 | { |
17928 | case DW_LNS_extended_op: | |
3e43a32a MS |
17929 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
17930 | &bytes_read); | |
473b7be6 | 17931 | line_ptr += bytes_read; |
a8c50c1f | 17932 | extended_end = line_ptr + extended_len; |
c906108c SS |
17933 | extended_op = read_1_byte (abfd, line_ptr); |
17934 | line_ptr += 1; | |
17935 | switch (extended_op) | |
17936 | { | |
17937 | case DW_LNE_end_sequence: | |
d9b3de22 | 17938 | state_machine.record_line = record_line; |
c906108c | 17939 | end_sequence = 1; |
c906108c SS |
17940 | break; |
17941 | case DW_LNE_set_address: | |
d9b3de22 DE |
17942 | { |
17943 | CORE_ADDR address | |
17944 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
17945 | ||
17946 | line_ptr += bytes_read; | |
17947 | check_line_address (cu, &state_machine, line_ptr, | |
17948 | lowpc, address); | |
17949 | state_machine.op_index = 0; | |
17950 | address += baseaddr; | |
17951 | state_machine.address | |
17952 | = gdbarch_adjust_dwarf2_line (gdbarch, address, 0); | |
17953 | } | |
c906108c SS |
17954 | break; |
17955 | case DW_LNE_define_file: | |
debd256d | 17956 | { |
d521ce57 | 17957 | const char *cur_file; |
debd256d | 17958 | unsigned int dir_index, mod_time, length; |
6e70227d | 17959 | |
3e43a32a MS |
17960 | cur_file = read_direct_string (abfd, line_ptr, |
17961 | &bytes_read); | |
debd256d JB |
17962 | line_ptr += bytes_read; |
17963 | dir_index = | |
17964 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17965 | line_ptr += bytes_read; | |
17966 | mod_time = | |
17967 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17968 | line_ptr += bytes_read; | |
17969 | length = | |
17970 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17971 | line_ptr += bytes_read; | |
17972 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17973 | } | |
c906108c | 17974 | break; |
d0c6ba3d CC |
17975 | case DW_LNE_set_discriminator: |
17976 | /* The discriminator is not interesting to the debugger; | |
a05a36a5 DE |
17977 | just ignore it. We still need to check its value though: |
17978 | if there are consecutive entries for the same | |
17979 | (non-prologue) line we want to coalesce them. | |
17980 | PR 17276. */ | |
d9b3de22 DE |
17981 | state_machine.discriminator |
17982 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17983 | state_machine.line_has_non_zero_discriminator | |
17984 | |= state_machine.discriminator != 0; | |
a05a36a5 | 17985 | line_ptr += bytes_read; |
d0c6ba3d | 17986 | break; |
c906108c | 17987 | default: |
4d3c2250 | 17988 | complaint (&symfile_complaints, |
e2e0b3e5 | 17989 | _("mangled .debug_line section")); |
debd256d | 17990 | return; |
c906108c | 17991 | } |
a8c50c1f DJ |
17992 | /* Make sure that we parsed the extended op correctly. If e.g. |
17993 | we expected a different address size than the producer used, | |
17994 | we may have read the wrong number of bytes. */ | |
17995 | if (line_ptr != extended_end) | |
17996 | { | |
17997 | complaint (&symfile_complaints, | |
17998 | _("mangled .debug_line section")); | |
17999 | return; | |
18000 | } | |
c906108c SS |
18001 | break; |
18002 | case DW_LNS_copy: | |
d9b3de22 DE |
18003 | dwarf_record_line (&reader_state, &state_machine, 0); |
18004 | state_machine.discriminator = 0; | |
c906108c SS |
18005 | break; |
18006 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
18007 | { |
18008 | CORE_ADDR adjust | |
18009 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
3e29f34a | 18010 | CORE_ADDR addr_adj; |
2dc7f7b3 | 18011 | |
d9b3de22 | 18012 | addr_adj = (((state_machine.op_index + adjust) |
2dc7f7b3 TT |
18013 | / lh->maximum_ops_per_instruction) |
18014 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
18015 | state_machine.address |
18016 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18017 | state_machine.op_index = ((state_machine.op_index + adjust) | |
18018 | % lh->maximum_ops_per_instruction); | |
2dc7f7b3 TT |
18019 | line_ptr += bytes_read; |
18020 | } | |
c906108c SS |
18021 | break; |
18022 | case DW_LNS_advance_line: | |
a05a36a5 DE |
18023 | { |
18024 | int line_delta | |
18025 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
18026 | ||
d9b3de22 | 18027 | state_machine.line += line_delta; |
a05a36a5 | 18028 | if (line_delta != 0) |
d9b3de22 DE |
18029 | state_machine.line_has_non_zero_discriminator |
18030 | = state_machine.discriminator != 0; | |
a05a36a5 DE |
18031 | line_ptr += bytes_read; |
18032 | } | |
c906108c SS |
18033 | break; |
18034 | case DW_LNS_set_file: | |
d9b3de22 DE |
18035 | { |
18036 | /* The arrays lh->include_dirs and lh->file_names are | |
18037 | 0-based, but the directory and file name numbers in | |
18038 | the statement program are 1-based. */ | |
18039 | struct file_entry *fe; | |
18040 | const char *dir = NULL; | |
18041 | ||
18042 | state_machine.file = read_unsigned_leb128 (abfd, line_ptr, | |
18043 | &bytes_read); | |
18044 | line_ptr += bytes_read; | |
18045 | if (state_machine.file == 0 | |
18046 | || state_machine.file - 1 >= lh->num_file_names) | |
18047 | dwarf2_debug_line_missing_file_complaint (); | |
18048 | else | |
18049 | { | |
18050 | fe = &lh->file_names[state_machine.file - 1]; | |
18051 | if (fe->dir_index && lh->include_dirs != NULL) | |
18052 | dir = lh->include_dirs[fe->dir_index - 1]; | |
18053 | if (record_lines_p) | |
18054 | { | |
18055 | state_machine.last_subfile = current_subfile; | |
18056 | state_machine.line_has_non_zero_discriminator | |
18057 | = state_machine.discriminator != 0; | |
18058 | dwarf2_start_subfile (fe->name, dir); | |
18059 | } | |
18060 | } | |
18061 | } | |
c906108c SS |
18062 | break; |
18063 | case DW_LNS_set_column: | |
0ad93d4f | 18064 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
18065 | line_ptr += bytes_read; |
18066 | break; | |
18067 | case DW_LNS_negate_stmt: | |
d9b3de22 | 18068 | state_machine.is_stmt = (!state_machine.is_stmt); |
c906108c SS |
18069 | break; |
18070 | case DW_LNS_set_basic_block: | |
c906108c | 18071 | break; |
c2c6d25f JM |
18072 | /* Add to the address register of the state machine the |
18073 | address increment value corresponding to special opcode | |
a738430d MK |
18074 | 255. I.e., this value is scaled by the minimum |
18075 | instruction length since special opcode 255 would have | |
b021a221 | 18076 | scaled the increment. */ |
c906108c | 18077 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
18078 | { |
18079 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
3e29f34a | 18080 | CORE_ADDR addr_adj; |
2dc7f7b3 | 18081 | |
d9b3de22 | 18082 | addr_adj = (((state_machine.op_index + adjust) |
2dc7f7b3 TT |
18083 | / lh->maximum_ops_per_instruction) |
18084 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
18085 | state_machine.address |
18086 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18087 | state_machine.op_index = ((state_machine.op_index + adjust) | |
18088 | % lh->maximum_ops_per_instruction); | |
2dc7f7b3 | 18089 | } |
c906108c SS |
18090 | break; |
18091 | case DW_LNS_fixed_advance_pc: | |
3e29f34a MR |
18092 | { |
18093 | CORE_ADDR addr_adj; | |
18094 | ||
18095 | addr_adj = read_2_bytes (abfd, line_ptr); | |
d9b3de22 DE |
18096 | state_machine.address |
18097 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18098 | state_machine.op_index = 0; | |
3e29f34a MR |
18099 | line_ptr += 2; |
18100 | } | |
c906108c | 18101 | break; |
9aa1fe7e | 18102 | default: |
a738430d MK |
18103 | { |
18104 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 18105 | int i; |
a738430d | 18106 | |
debd256d | 18107 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
18108 | { |
18109 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18110 | line_ptr += bytes_read; | |
18111 | } | |
18112 | } | |
c906108c SS |
18113 | } |
18114 | } | |
d9b3de22 DE |
18115 | |
18116 | if (!end_sequence) | |
18117 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
18118 | ||
18119 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
18120 | in which case we still finish recording the last line). */ | |
18121 | dwarf_record_line (&reader_state, &state_machine, 1); | |
c906108c | 18122 | } |
f3f5162e DE |
18123 | } |
18124 | ||
18125 | /* Decode the Line Number Program (LNP) for the given line_header | |
18126 | structure and CU. The actual information extracted and the type | |
18127 | of structures created from the LNP depends on the value of PST. | |
18128 | ||
18129 | 1. If PST is NULL, then this procedure uses the data from the program | |
18130 | to create all necessary symbol tables, and their linetables. | |
18131 | ||
18132 | 2. If PST is not NULL, this procedure reads the program to determine | |
18133 | the list of files included by the unit represented by PST, and | |
18134 | builds all the associated partial symbol tables. | |
18135 | ||
18136 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18137 | It is used for relative paths in the line table. | |
18138 | NOTE: When processing partial symtabs (pst != NULL), | |
18139 | comp_dir == pst->dirname. | |
18140 | ||
18141 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
18142 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
18143 | symtab we don't use it in the name of the psymtabs we create. | |
18144 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
18145 | A good testcase for this is mb-inline.exp. |
18146 | ||
527f3840 JK |
18147 | LOWPC is the lowest address in CU (or 0 if not known). |
18148 | ||
18149 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
18150 | for its PC<->lines mapping information. Otherwise only the filename | |
18151 | table is read in. */ | |
f3f5162e DE |
18152 | |
18153 | static void | |
18154 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 18155 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 18156 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
18157 | { |
18158 | struct objfile *objfile = cu->objfile; | |
18159 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 18160 | |
527f3840 JK |
18161 | if (decode_mapping) |
18162 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
18163 | |
18164 | if (decode_for_pst_p) | |
18165 | { | |
18166 | int file_index; | |
18167 | ||
18168 | /* Now that we're done scanning the Line Header Program, we can | |
18169 | create the psymtab of each included file. */ | |
18170 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
18171 | if (lh->file_names[file_index].included_p == 1) | |
18172 | { | |
d521ce57 | 18173 | const char *include_name = |
c6da4cef DE |
18174 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
18175 | if (include_name != NULL) | |
aaa75496 JB |
18176 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
18177 | } | |
18178 | } | |
cb1df416 DJ |
18179 | else |
18180 | { | |
18181 | /* Make sure a symtab is created for every file, even files | |
18182 | which contain only variables (i.e. no code with associated | |
18183 | line numbers). */ | |
43f3e411 | 18184 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 18185 | int i; |
cb1df416 DJ |
18186 | |
18187 | for (i = 0; i < lh->num_file_names; i++) | |
18188 | { | |
d521ce57 | 18189 | const char *dir = NULL; |
f3f5162e | 18190 | struct file_entry *fe; |
9a619af0 | 18191 | |
cb1df416 | 18192 | fe = &lh->file_names[i]; |
afa6c9ab | 18193 | if (fe->dir_index && lh->include_dirs != NULL) |
cb1df416 | 18194 | dir = lh->include_dirs[fe->dir_index - 1]; |
4d663531 | 18195 | dwarf2_start_subfile (fe->name, dir); |
cb1df416 | 18196 | |
cb1df416 | 18197 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
18198 | { |
18199 | current_subfile->symtab | |
18200 | = allocate_symtab (cust, current_subfile->name); | |
18201 | } | |
cb1df416 DJ |
18202 | fe->symtab = current_subfile->symtab; |
18203 | } | |
18204 | } | |
c906108c SS |
18205 | } |
18206 | ||
18207 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
18208 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 18209 | or NULL if not known. |
c906108c SS |
18210 | This routine tries to keep line numbers from identical absolute and |
18211 | relative file names in a common subfile. | |
18212 | ||
18213 | Using the `list' example from the GDB testsuite, which resides in | |
18214 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
18215 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
18216 | ||
c5aa993b | 18217 | DW_AT_name: /srcdir/list0.c |
4d663531 | 18218 | DW_AT_comp_dir: /compdir |
357e46e7 | 18219 | files.files[0].name: list0.h |
c5aa993b | 18220 | files.files[0].dir: /srcdir |
357e46e7 | 18221 | files.files[1].name: list0.c |
c5aa993b | 18222 | files.files[1].dir: /srcdir |
c906108c SS |
18223 | |
18224 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
18225 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
18226 | start_subfile will ensure that this happens provided that we pass the | |
18227 | concatenation of files.files[1].dir and files.files[1].name as the | |
18228 | subfile's name. */ | |
c906108c SS |
18229 | |
18230 | static void | |
4d663531 | 18231 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 18232 | { |
d521ce57 | 18233 | char *copy = NULL; |
4f1520fb | 18234 | |
4d663531 | 18235 | /* In order not to lose the line information directory, |
4f1520fb FR |
18236 | we concatenate it to the filename when it makes sense. |
18237 | Note that the Dwarf3 standard says (speaking of filenames in line | |
18238 | information): ``The directory index is ignored for file names | |
18239 | that represent full path names''. Thus ignoring dirname in the | |
18240 | `else' branch below isn't an issue. */ | |
c906108c | 18241 | |
d5166ae1 | 18242 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
18243 | { |
18244 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
18245 | filename = copy; | |
18246 | } | |
c906108c | 18247 | |
4d663531 | 18248 | start_subfile (filename); |
4f1520fb | 18249 | |
d521ce57 TT |
18250 | if (copy != NULL) |
18251 | xfree (copy); | |
c906108c SS |
18252 | } |
18253 | ||
f4dc4d17 DE |
18254 | /* Start a symtab for DWARF. |
18255 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
18256 | ||
43f3e411 | 18257 | static struct compunit_symtab * |
f4dc4d17 | 18258 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 18259 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 18260 | { |
43f3e411 DE |
18261 | struct compunit_symtab *cust |
18262 | = start_symtab (cu->objfile, name, comp_dir, low_pc); | |
18263 | ||
f4dc4d17 DE |
18264 | record_debugformat ("DWARF 2"); |
18265 | record_producer (cu->producer); | |
18266 | ||
18267 | /* We assume that we're processing GCC output. */ | |
18268 | processing_gcc_compilation = 2; | |
18269 | ||
4d4ec4e5 | 18270 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
18271 | |
18272 | return cust; | |
f4dc4d17 DE |
18273 | } |
18274 | ||
4c2df51b DJ |
18275 | static void |
18276 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18277 | struct dwarf2_cu *cu) |
4c2df51b | 18278 | { |
e7c27a73 DJ |
18279 | struct objfile *objfile = cu->objfile; |
18280 | struct comp_unit_head *cu_header = &cu->header; | |
18281 | ||
4c2df51b DJ |
18282 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
18283 | code here to turn a symbol with DW_AT_external and a | |
18284 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
18285 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
18286 | with some versions of binutils) where shared libraries could have | |
18287 | relocations against symbols in their debug information - the | |
18288 | minimal symbol would have the right address, but the debug info | |
18289 | would not. It's no longer necessary, because we will explicitly | |
18290 | apply relocations when we read in the debug information now. */ | |
18291 | ||
18292 | /* A DW_AT_location attribute with no contents indicates that a | |
18293 | variable has been optimized away. */ | |
18294 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
18295 | { | |
f1e6e072 | 18296 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
18297 | return; |
18298 | } | |
18299 | ||
18300 | /* Handle one degenerate form of location expression specially, to | |
18301 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
18302 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
18303 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
18304 | |
18305 | if (attr_form_is_block (attr) | |
3019eac3 DE |
18306 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
18307 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
18308 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
18309 | && (DW_BLOCK (attr)->size | |
18310 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 18311 | { |
891d2f0b | 18312 | unsigned int dummy; |
4c2df51b | 18313 | |
3019eac3 DE |
18314 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
18315 | SYMBOL_VALUE_ADDRESS (sym) = | |
18316 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
18317 | else | |
18318 | SYMBOL_VALUE_ADDRESS (sym) = | |
18319 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 18320 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
18321 | fixup_symbol_section (sym, objfile); |
18322 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
18323 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
18324 | return; |
18325 | } | |
18326 | ||
18327 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
18328 | expression evaluator, and use LOC_COMPUTED only when necessary | |
18329 | (i.e. when the value of a register or memory location is | |
18330 | referenced, or a thread-local block, etc.). Then again, it might | |
18331 | not be worthwhile. I'm assuming that it isn't unless performance | |
18332 | or memory numbers show me otherwise. */ | |
18333 | ||
f1e6e072 | 18334 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 18335 | |
f1e6e072 | 18336 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 18337 | cu->has_loclist = 1; |
4c2df51b DJ |
18338 | } |
18339 | ||
c906108c SS |
18340 | /* Given a pointer to a DWARF information entry, figure out if we need |
18341 | to make a symbol table entry for it, and if so, create a new entry | |
18342 | and return a pointer to it. | |
18343 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
18344 | used the passed type. |
18345 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
18346 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
18347 | |
18348 | static struct symbol * | |
34eaf542 TT |
18349 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
18350 | struct symbol *space) | |
c906108c | 18351 | { |
e7c27a73 | 18352 | struct objfile *objfile = cu->objfile; |
3e29f34a | 18353 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 18354 | struct symbol *sym = NULL; |
15d034d0 | 18355 | const char *name; |
c906108c SS |
18356 | struct attribute *attr = NULL; |
18357 | struct attribute *attr2 = NULL; | |
e142c38c | 18358 | CORE_ADDR baseaddr; |
e37fd15a SW |
18359 | struct pending **list_to_add = NULL; |
18360 | ||
edb3359d | 18361 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
18362 | |
18363 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 18364 | |
94af9270 | 18365 | name = dwarf2_name (die, cu); |
c906108c SS |
18366 | if (name) |
18367 | { | |
94af9270 | 18368 | const char *linkagename; |
34eaf542 | 18369 | int suppress_add = 0; |
94af9270 | 18370 | |
34eaf542 TT |
18371 | if (space) |
18372 | sym = space; | |
18373 | else | |
e623cf5d | 18374 | sym = allocate_symbol (objfile); |
c906108c | 18375 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
18376 | |
18377 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 18378 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
18379 | linkagename = dwarf2_physname (name, die, cu); |
18380 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 18381 | |
f55ee35c JK |
18382 | /* Fortran does not have mangling standard and the mangling does differ |
18383 | between gfortran, iFort etc. */ | |
18384 | if (cu->language == language_fortran | |
b250c185 | 18385 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 18386 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 18387 | dwarf2_full_name (name, die, cu), |
29df156d | 18388 | NULL); |
f55ee35c | 18389 | |
c906108c | 18390 | /* Default assumptions. |
c5aa993b | 18391 | Use the passed type or decode it from the die. */ |
176620f1 | 18392 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 18393 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
18394 | if (type != NULL) |
18395 | SYMBOL_TYPE (sym) = type; | |
18396 | else | |
e7c27a73 | 18397 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
18398 | attr = dwarf2_attr (die, |
18399 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
18400 | cu); | |
c906108c SS |
18401 | if (attr) |
18402 | { | |
18403 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
18404 | } | |
cb1df416 | 18405 | |
edb3359d DJ |
18406 | attr = dwarf2_attr (die, |
18407 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
18408 | cu); | |
cb1df416 DJ |
18409 | if (attr) |
18410 | { | |
18411 | int file_index = DW_UNSND (attr); | |
9a619af0 | 18412 | |
cb1df416 DJ |
18413 | if (cu->line_header == NULL |
18414 | || file_index > cu->line_header->num_file_names) | |
18415 | complaint (&symfile_complaints, | |
18416 | _("file index out of range")); | |
1c3d648d | 18417 | else if (file_index > 0) |
cb1df416 DJ |
18418 | { |
18419 | struct file_entry *fe; | |
9a619af0 | 18420 | |
cb1df416 | 18421 | fe = &cu->line_header->file_names[file_index - 1]; |
08be3fe3 | 18422 | symbol_set_symtab (sym, fe->symtab); |
cb1df416 DJ |
18423 | } |
18424 | } | |
18425 | ||
c906108c SS |
18426 | switch (die->tag) |
18427 | { | |
18428 | case DW_TAG_label: | |
e142c38c | 18429 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 18430 | if (attr) |
3e29f34a MR |
18431 | { |
18432 | CORE_ADDR addr; | |
18433 | ||
18434 | addr = attr_value_as_address (attr); | |
18435 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
18436 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
18437 | } | |
0f5238ed TT |
18438 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
18439 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 18440 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 18441 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
18442 | break; |
18443 | case DW_TAG_subprogram: | |
18444 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
18445 | finish_block. */ | |
f1e6e072 | 18446 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 18447 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
18448 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
18449 | || cu->language == language_ada) | |
c906108c | 18450 | { |
2cfa0c8d JB |
18451 | /* Subprograms marked external are stored as a global symbol. |
18452 | Ada subprograms, whether marked external or not, are always | |
18453 | stored as a global symbol, because we want to be able to | |
18454 | access them globally. For instance, we want to be able | |
18455 | to break on a nested subprogram without having to | |
18456 | specify the context. */ | |
e37fd15a | 18457 | list_to_add = &global_symbols; |
c906108c SS |
18458 | } |
18459 | else | |
18460 | { | |
e37fd15a | 18461 | list_to_add = cu->list_in_scope; |
c906108c SS |
18462 | } |
18463 | break; | |
edb3359d DJ |
18464 | case DW_TAG_inlined_subroutine: |
18465 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
18466 | finish_block. */ | |
f1e6e072 | 18467 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 18468 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 18469 | list_to_add = cu->list_in_scope; |
edb3359d | 18470 | break; |
34eaf542 TT |
18471 | case DW_TAG_template_value_param: |
18472 | suppress_add = 1; | |
18473 | /* Fall through. */ | |
72929c62 | 18474 | case DW_TAG_constant: |
c906108c | 18475 | case DW_TAG_variable: |
254e6b9e | 18476 | case DW_TAG_member: |
0963b4bd MS |
18477 | /* Compilation with minimal debug info may result in |
18478 | variables with missing type entries. Change the | |
18479 | misleading `void' type to something sensible. */ | |
c906108c | 18480 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 18481 | SYMBOL_TYPE (sym) |
46bf5051 | 18482 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 18483 | |
e142c38c | 18484 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
18485 | /* In the case of DW_TAG_member, we should only be called for |
18486 | static const members. */ | |
18487 | if (die->tag == DW_TAG_member) | |
18488 | { | |
3863f96c DE |
18489 | /* dwarf2_add_field uses die_is_declaration, |
18490 | so we do the same. */ | |
254e6b9e DE |
18491 | gdb_assert (die_is_declaration (die, cu)); |
18492 | gdb_assert (attr); | |
18493 | } | |
c906108c SS |
18494 | if (attr) |
18495 | { | |
e7c27a73 | 18496 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 18497 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 18498 | if (!suppress_add) |
34eaf542 TT |
18499 | { |
18500 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 18501 | list_to_add = &global_symbols; |
34eaf542 | 18502 | else |
e37fd15a | 18503 | list_to_add = cu->list_in_scope; |
34eaf542 | 18504 | } |
c906108c SS |
18505 | break; |
18506 | } | |
e142c38c | 18507 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18508 | if (attr) |
18509 | { | |
e7c27a73 | 18510 | var_decode_location (attr, sym, cu); |
e142c38c | 18511 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
18512 | |
18513 | /* Fortran explicitly imports any global symbols to the local | |
18514 | scope by DW_TAG_common_block. */ | |
18515 | if (cu->language == language_fortran && die->parent | |
18516 | && die->parent->tag == DW_TAG_common_block) | |
18517 | attr2 = NULL; | |
18518 | ||
caac4577 JG |
18519 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
18520 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
18521 | && !dwarf2_per_objfile->has_section_at_zero) | |
18522 | { | |
18523 | /* When a static variable is eliminated by the linker, | |
18524 | the corresponding debug information is not stripped | |
18525 | out, but the variable address is set to null; | |
18526 | do not add such variables into symbol table. */ | |
18527 | } | |
18528 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 18529 | { |
f55ee35c JK |
18530 | /* Workaround gfortran PR debug/40040 - it uses |
18531 | DW_AT_location for variables in -fPIC libraries which may | |
18532 | get overriden by other libraries/executable and get | |
18533 | a different address. Resolve it by the minimal symbol | |
18534 | which may come from inferior's executable using copy | |
18535 | relocation. Make this workaround only for gfortran as for | |
18536 | other compilers GDB cannot guess the minimal symbol | |
18537 | Fortran mangling kind. */ | |
18538 | if (cu->language == language_fortran && die->parent | |
18539 | && die->parent->tag == DW_TAG_module | |
18540 | && cu->producer | |
28586665 | 18541 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 18542 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 18543 | |
1c809c68 TT |
18544 | /* A variable with DW_AT_external is never static, |
18545 | but it may be block-scoped. */ | |
18546 | list_to_add = (cu->list_in_scope == &file_symbols | |
18547 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 18548 | } |
c906108c | 18549 | else |
e37fd15a | 18550 | list_to_add = cu->list_in_scope; |
c906108c SS |
18551 | } |
18552 | else | |
18553 | { | |
18554 | /* We do not know the address of this symbol. | |
c5aa993b JM |
18555 | If it is an external symbol and we have type information |
18556 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
18557 | The address of the variable will then be determined from | |
18558 | the minimal symbol table whenever the variable is | |
18559 | referenced. */ | |
e142c38c | 18560 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
18561 | |
18562 | /* Fortran explicitly imports any global symbols to the local | |
18563 | scope by DW_TAG_common_block. */ | |
18564 | if (cu->language == language_fortran && die->parent | |
18565 | && die->parent->tag == DW_TAG_common_block) | |
18566 | { | |
18567 | /* SYMBOL_CLASS doesn't matter here because | |
18568 | read_common_block is going to reset it. */ | |
18569 | if (!suppress_add) | |
18570 | list_to_add = cu->list_in_scope; | |
18571 | } | |
18572 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
18573 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 18574 | { |
0fe7935b DJ |
18575 | /* A variable with DW_AT_external is never static, but it |
18576 | may be block-scoped. */ | |
18577 | list_to_add = (cu->list_in_scope == &file_symbols | |
18578 | ? &global_symbols : cu->list_in_scope); | |
18579 | ||
f1e6e072 | 18580 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 18581 | } |
442ddf59 JK |
18582 | else if (!die_is_declaration (die, cu)) |
18583 | { | |
18584 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
18585 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
18586 | if (!suppress_add) |
18587 | list_to_add = cu->list_in_scope; | |
442ddf59 | 18588 | } |
c906108c SS |
18589 | } |
18590 | break; | |
18591 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
18592 | /* If we are inside a function, mark this as an argument. If |
18593 | not, we might be looking at an argument to an inlined function | |
18594 | when we do not have enough information to show inlined frames; | |
18595 | pretend it's a local variable in that case so that the user can | |
18596 | still see it. */ | |
18597 | if (context_stack_depth > 0 | |
18598 | && context_stack[context_stack_depth - 1].name != NULL) | |
18599 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 18600 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18601 | if (attr) |
18602 | { | |
e7c27a73 | 18603 | var_decode_location (attr, sym, cu); |
c906108c | 18604 | } |
e142c38c | 18605 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18606 | if (attr) |
18607 | { | |
e7c27a73 | 18608 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18609 | } |
f346a30d | 18610 | |
e37fd15a | 18611 | list_to_add = cu->list_in_scope; |
c906108c SS |
18612 | break; |
18613 | case DW_TAG_unspecified_parameters: | |
18614 | /* From varargs functions; gdb doesn't seem to have any | |
18615 | interest in this information, so just ignore it for now. | |
18616 | (FIXME?) */ | |
18617 | break; | |
34eaf542 TT |
18618 | case DW_TAG_template_type_param: |
18619 | suppress_add = 1; | |
18620 | /* Fall through. */ | |
c906108c | 18621 | case DW_TAG_class_type: |
680b30c7 | 18622 | case DW_TAG_interface_type: |
c906108c SS |
18623 | case DW_TAG_structure_type: |
18624 | case DW_TAG_union_type: | |
72019c9c | 18625 | case DW_TAG_set_type: |
c906108c | 18626 | case DW_TAG_enumeration_type: |
f1e6e072 | 18627 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18628 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 18629 | |
63d06c5c | 18630 | { |
9c37b5ae | 18631 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
18632 | really ever be static objects: otherwise, if you try |
18633 | to, say, break of a class's method and you're in a file | |
18634 | which doesn't mention that class, it won't work unless | |
18635 | the check for all static symbols in lookup_symbol_aux | |
18636 | saves you. See the OtherFileClass tests in | |
18637 | gdb.c++/namespace.exp. */ | |
18638 | ||
e37fd15a | 18639 | if (!suppress_add) |
34eaf542 | 18640 | { |
34eaf542 | 18641 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 18642 | && cu->language == language_cplus |
34eaf542 | 18643 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 18644 | |
64382290 | 18645 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 18646 | ... }" also defines a typedef for "foo". */ |
64382290 | 18647 | if (cu->language == language_cplus |
45280282 | 18648 | || cu->language == language_ada |
c44af4eb TT |
18649 | || cu->language == language_d |
18650 | || cu->language == language_rust) | |
64382290 TT |
18651 | { |
18652 | /* The symbol's name is already allocated along | |
18653 | with this objfile, so we don't need to | |
18654 | duplicate it for the type. */ | |
18655 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
18656 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
18657 | } | |
63d06c5c DC |
18658 | } |
18659 | } | |
c906108c SS |
18660 | break; |
18661 | case DW_TAG_typedef: | |
f1e6e072 | 18662 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 18663 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 18664 | list_to_add = cu->list_in_scope; |
63d06c5c | 18665 | break; |
c906108c | 18666 | case DW_TAG_base_type: |
a02abb62 | 18667 | case DW_TAG_subrange_type: |
f1e6e072 | 18668 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18669 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 18670 | list_to_add = cu->list_in_scope; |
c906108c SS |
18671 | break; |
18672 | case DW_TAG_enumerator: | |
e142c38c | 18673 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18674 | if (attr) |
18675 | { | |
e7c27a73 | 18676 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18677 | } |
63d06c5c DC |
18678 | { |
18679 | /* NOTE: carlton/2003-11-10: See comment above in the | |
18680 | DW_TAG_class_type, etc. block. */ | |
18681 | ||
e142c38c | 18682 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 18683 | && cu->language == language_cplus |
e142c38c | 18684 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 18685 | } |
c906108c | 18686 | break; |
74921315 | 18687 | case DW_TAG_imported_declaration: |
5c4e30ca | 18688 | case DW_TAG_namespace: |
f1e6e072 | 18689 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 18690 | list_to_add = &global_symbols; |
5c4e30ca | 18691 | break; |
530e8392 KB |
18692 | case DW_TAG_module: |
18693 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
18694 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
18695 | list_to_add = &global_symbols; | |
18696 | break; | |
4357ac6c | 18697 | case DW_TAG_common_block: |
f1e6e072 | 18698 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
18699 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
18700 | add_symbol_to_list (sym, cu->list_in_scope); | |
18701 | break; | |
c906108c SS |
18702 | default: |
18703 | /* Not a tag we recognize. Hopefully we aren't processing | |
18704 | trash data, but since we must specifically ignore things | |
18705 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 18706 | this point. */ |
e2e0b3e5 | 18707 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 18708 | dwarf_tag_name (die->tag)); |
c906108c SS |
18709 | break; |
18710 | } | |
df8a16a1 | 18711 | |
e37fd15a SW |
18712 | if (suppress_add) |
18713 | { | |
18714 | sym->hash_next = objfile->template_symbols; | |
18715 | objfile->template_symbols = sym; | |
18716 | list_to_add = NULL; | |
18717 | } | |
18718 | ||
18719 | if (list_to_add != NULL) | |
18720 | add_symbol_to_list (sym, list_to_add); | |
18721 | ||
df8a16a1 DJ |
18722 | /* For the benefit of old versions of GCC, check for anonymous |
18723 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 18724 | if (!cu->processing_has_namespace_info |
94af9270 | 18725 | && cu->language == language_cplus) |
a10964d1 | 18726 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
18727 | } |
18728 | return (sym); | |
18729 | } | |
18730 | ||
34eaf542 TT |
18731 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
18732 | ||
18733 | static struct symbol * | |
18734 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
18735 | { | |
18736 | return new_symbol_full (die, type, cu, NULL); | |
18737 | } | |
18738 | ||
98bfdba5 PA |
18739 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
18740 | zero-extend it as appropriate for the symbol's type. The DWARF | |
18741 | standard (v4) is not entirely clear about the meaning of using | |
18742 | DW_FORM_dataN for a constant with a signed type, where the type is | |
18743 | wider than the data. The conclusion of a discussion on the DWARF | |
18744 | list was that this is unspecified. We choose to always zero-extend | |
18745 | because that is the interpretation long in use by GCC. */ | |
c906108c | 18746 | |
98bfdba5 | 18747 | static gdb_byte * |
ff39bb5e | 18748 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 18749 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 18750 | { |
e7c27a73 | 18751 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
18752 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
18753 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
18754 | LONGEST l = DW_UNSND (attr); |
18755 | ||
18756 | if (bits < sizeof (*value) * 8) | |
18757 | { | |
18758 | l &= ((LONGEST) 1 << bits) - 1; | |
18759 | *value = l; | |
18760 | } | |
18761 | else if (bits == sizeof (*value) * 8) | |
18762 | *value = l; | |
18763 | else | |
18764 | { | |
224c3ddb | 18765 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
18766 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
18767 | return bytes; | |
18768 | } | |
18769 | ||
18770 | return NULL; | |
18771 | } | |
18772 | ||
18773 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
18774 | the value does not fit in *VALUE, set *BYTES - either already | |
18775 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
18776 | or, set *BATON, if we translated the constant to a location | |
18777 | expression. */ | |
18778 | ||
18779 | static void | |
ff39bb5e | 18780 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
18781 | const char *name, struct obstack *obstack, |
18782 | struct dwarf2_cu *cu, | |
d521ce57 | 18783 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
18784 | struct dwarf2_locexpr_baton **baton) |
18785 | { | |
18786 | struct objfile *objfile = cu->objfile; | |
18787 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 18788 | struct dwarf_block *blk; |
98bfdba5 PA |
18789 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
18790 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
18791 | ||
18792 | *value = 0; | |
18793 | *bytes = NULL; | |
18794 | *baton = NULL; | |
c906108c SS |
18795 | |
18796 | switch (attr->form) | |
18797 | { | |
18798 | case DW_FORM_addr: | |
3019eac3 | 18799 | case DW_FORM_GNU_addr_index: |
ac56253d | 18800 | { |
ac56253d TT |
18801 | gdb_byte *data; |
18802 | ||
98bfdba5 PA |
18803 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
18804 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 18805 | cu_header->addr_size, |
98bfdba5 | 18806 | TYPE_LENGTH (type)); |
ac56253d TT |
18807 | /* Symbols of this form are reasonably rare, so we just |
18808 | piggyback on the existing location code rather than writing | |
18809 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 18810 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
18811 | (*baton)->per_cu = cu->per_cu; |
18812 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 18813 | |
98bfdba5 | 18814 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 18815 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 18816 | (*baton)->data = data; |
ac56253d TT |
18817 | |
18818 | data[0] = DW_OP_addr; | |
18819 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
18820 | byte_order, DW_ADDR (attr)); | |
18821 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 18822 | } |
c906108c | 18823 | break; |
4ac36638 | 18824 | case DW_FORM_string: |
93b5768b | 18825 | case DW_FORM_strp: |
3019eac3 | 18826 | case DW_FORM_GNU_str_index: |
36586728 | 18827 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
18828 | /* DW_STRING is already allocated on the objfile obstack, point |
18829 | directly to it. */ | |
d521ce57 | 18830 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 18831 | break; |
c906108c SS |
18832 | case DW_FORM_block1: |
18833 | case DW_FORM_block2: | |
18834 | case DW_FORM_block4: | |
18835 | case DW_FORM_block: | |
2dc7f7b3 | 18836 | case DW_FORM_exprloc: |
c906108c | 18837 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
18838 | if (TYPE_LENGTH (type) != blk->size) |
18839 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
18840 | TYPE_LENGTH (type)); | |
18841 | *bytes = blk->data; | |
c906108c | 18842 | break; |
2df3850c JM |
18843 | |
18844 | /* The DW_AT_const_value attributes are supposed to carry the | |
18845 | symbol's value "represented as it would be on the target | |
18846 | architecture." By the time we get here, it's already been | |
18847 | converted to host endianness, so we just need to sign- or | |
18848 | zero-extend it as appropriate. */ | |
18849 | case DW_FORM_data1: | |
3aef2284 | 18850 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 18851 | break; |
c906108c | 18852 | case DW_FORM_data2: |
3aef2284 | 18853 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 18854 | break; |
c906108c | 18855 | case DW_FORM_data4: |
3aef2284 | 18856 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 18857 | break; |
c906108c | 18858 | case DW_FORM_data8: |
3aef2284 | 18859 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
18860 | break; |
18861 | ||
c906108c | 18862 | case DW_FORM_sdata: |
98bfdba5 | 18863 | *value = DW_SND (attr); |
2df3850c JM |
18864 | break; |
18865 | ||
c906108c | 18866 | case DW_FORM_udata: |
98bfdba5 | 18867 | *value = DW_UNSND (attr); |
c906108c | 18868 | break; |
2df3850c | 18869 | |
c906108c | 18870 | default: |
4d3c2250 | 18871 | complaint (&symfile_complaints, |
e2e0b3e5 | 18872 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 18873 | dwarf_form_name (attr->form)); |
98bfdba5 | 18874 | *value = 0; |
c906108c SS |
18875 | break; |
18876 | } | |
18877 | } | |
18878 | ||
2df3850c | 18879 | |
98bfdba5 PA |
18880 | /* Copy constant value from an attribute to a symbol. */ |
18881 | ||
2df3850c | 18882 | static void |
ff39bb5e | 18883 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 18884 | struct dwarf2_cu *cu) |
2df3850c | 18885 | { |
98bfdba5 | 18886 | struct objfile *objfile = cu->objfile; |
12df843f | 18887 | LONGEST value; |
d521ce57 | 18888 | const gdb_byte *bytes; |
98bfdba5 | 18889 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 18890 | |
98bfdba5 PA |
18891 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
18892 | SYMBOL_PRINT_NAME (sym), | |
18893 | &objfile->objfile_obstack, cu, | |
18894 | &value, &bytes, &baton); | |
2df3850c | 18895 | |
98bfdba5 PA |
18896 | if (baton != NULL) |
18897 | { | |
98bfdba5 | 18898 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 18899 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
18900 | } |
18901 | else if (bytes != NULL) | |
18902 | { | |
18903 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 18904 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
18905 | } |
18906 | else | |
18907 | { | |
18908 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 18909 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 18910 | } |
2df3850c JM |
18911 | } |
18912 | ||
c906108c SS |
18913 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
18914 | ||
18915 | static struct type * | |
e7c27a73 | 18916 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18917 | { |
c906108c | 18918 | struct attribute *type_attr; |
c906108c | 18919 | |
e142c38c | 18920 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
18921 | if (!type_attr) |
18922 | { | |
18923 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 18924 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 18925 | } |
348e048f | 18926 | |
673bfd45 | 18927 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18928 | } |
18929 | ||
b4ba55a1 JB |
18930 | /* True iff CU's producer generates GNAT Ada auxiliary information |
18931 | that allows to find parallel types through that information instead | |
18932 | of having to do expensive parallel lookups by type name. */ | |
18933 | ||
18934 | static int | |
18935 | need_gnat_info (struct dwarf2_cu *cu) | |
18936 | { | |
18937 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
18938 | of GNAT produces this auxiliary information, without any indication | |
18939 | that it is produced. Part of enhancing the FSF version of GNAT | |
18940 | to produce that information will be to put in place an indicator | |
18941 | that we can use in order to determine whether the descriptive type | |
18942 | info is available or not. One suggestion that has been made is | |
18943 | to use a new attribute, attached to the CU die. For now, assume | |
18944 | that the descriptive type info is not available. */ | |
18945 | return 0; | |
18946 | } | |
18947 | ||
b4ba55a1 JB |
18948 | /* Return the auxiliary type of the die in question using its |
18949 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
18950 | attribute is not present. */ | |
18951 | ||
18952 | static struct type * | |
18953 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
18954 | { | |
b4ba55a1 | 18955 | struct attribute *type_attr; |
b4ba55a1 JB |
18956 | |
18957 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
18958 | if (!type_attr) | |
18959 | return NULL; | |
18960 | ||
673bfd45 | 18961 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
18962 | } |
18963 | ||
18964 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
18965 | descriptive type accordingly. */ | |
18966 | ||
18967 | static void | |
18968 | set_descriptive_type (struct type *type, struct die_info *die, | |
18969 | struct dwarf2_cu *cu) | |
18970 | { | |
18971 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
18972 | ||
18973 | if (descriptive_type) | |
18974 | { | |
18975 | ALLOCATE_GNAT_AUX_TYPE (type); | |
18976 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
18977 | } | |
18978 | } | |
18979 | ||
c906108c SS |
18980 | /* Return the containing type of the die in question using its |
18981 | DW_AT_containing_type attribute. */ | |
18982 | ||
18983 | static struct type * | |
e7c27a73 | 18984 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18985 | { |
c906108c | 18986 | struct attribute *type_attr; |
c906108c | 18987 | |
e142c38c | 18988 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
18989 | if (!type_attr) |
18990 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 18991 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 18992 | |
673bfd45 | 18993 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18994 | } |
18995 | ||
ac9ec31b DE |
18996 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
18997 | ||
18998 | static struct type * | |
18999 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
19000 | { | |
19001 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19002 | char *message, *saved; | |
19003 | ||
19004 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 19005 | objfile_name (objfile), |
ac9ec31b DE |
19006 | cu->header.offset.sect_off, |
19007 | die->offset.sect_off); | |
224c3ddb SM |
19008 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
19009 | message, strlen (message)); | |
ac9ec31b DE |
19010 | xfree (message); |
19011 | ||
19f392bc | 19012 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
19013 | } |
19014 | ||
673bfd45 | 19015 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
19016 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
19017 | DW_AT_containing_type. | |
673bfd45 DE |
19018 | If there is no type substitute an error marker. */ |
19019 | ||
c906108c | 19020 | static struct type * |
ff39bb5e | 19021 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 19022 | struct dwarf2_cu *cu) |
c906108c | 19023 | { |
bb5ed363 | 19024 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
19025 | struct type *this_type; |
19026 | ||
ac9ec31b DE |
19027 | gdb_assert (attr->name == DW_AT_type |
19028 | || attr->name == DW_AT_GNAT_descriptive_type | |
19029 | || attr->name == DW_AT_containing_type); | |
19030 | ||
673bfd45 DE |
19031 | /* First see if we have it cached. */ |
19032 | ||
36586728 TT |
19033 | if (attr->form == DW_FORM_GNU_ref_alt) |
19034 | { | |
19035 | struct dwarf2_per_cu_data *per_cu; | |
19036 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
19037 | ||
19038 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
19039 | this_type = get_die_type_at_offset (offset, per_cu); | |
19040 | } | |
7771576e | 19041 | else if (attr_form_is_ref (attr)) |
673bfd45 | 19042 | { |
b64f50a1 | 19043 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
19044 | |
19045 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
19046 | } | |
55f1336d | 19047 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 19048 | { |
ac9ec31b | 19049 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 19050 | |
ac9ec31b | 19051 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
19052 | } |
19053 | else | |
19054 | { | |
ac9ec31b DE |
19055 | complaint (&symfile_complaints, |
19056 | _("Dwarf Error: Bad type attribute %s in DIE" | |
19057 | " at 0x%x [in module %s]"), | |
19058 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 19059 | objfile_name (objfile)); |
ac9ec31b | 19060 | return build_error_marker_type (cu, die); |
673bfd45 DE |
19061 | } |
19062 | ||
19063 | /* If not cached we need to read it in. */ | |
19064 | ||
19065 | if (this_type == NULL) | |
19066 | { | |
ac9ec31b | 19067 | struct die_info *type_die = NULL; |
673bfd45 DE |
19068 | struct dwarf2_cu *type_cu = cu; |
19069 | ||
7771576e | 19070 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19071 | type_die = follow_die_ref (die, attr, &type_cu); |
19072 | if (type_die == NULL) | |
19073 | return build_error_marker_type (cu, die); | |
19074 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
19075 | from an inter-CU reference and the type's CU got expanded before |
19076 | ours. */ | |
ac9ec31b | 19077 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
19078 | } |
19079 | ||
19080 | /* If we still don't have a type use an error marker. */ | |
19081 | ||
19082 | if (this_type == NULL) | |
ac9ec31b | 19083 | return build_error_marker_type (cu, die); |
673bfd45 | 19084 | |
f792889a | 19085 | return this_type; |
c906108c SS |
19086 | } |
19087 | ||
673bfd45 DE |
19088 | /* Return the type in DIE, CU. |
19089 | Returns NULL for invalid types. | |
19090 | ||
02142a6c | 19091 | This first does a lookup in die_type_hash, |
673bfd45 DE |
19092 | and only reads the die in if necessary. |
19093 | ||
19094 | NOTE: This can be called when reading in partial or full symbols. */ | |
19095 | ||
f792889a | 19096 | static struct type * |
e7c27a73 | 19097 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19098 | { |
f792889a DJ |
19099 | struct type *this_type; |
19100 | ||
19101 | this_type = get_die_type (die, cu); | |
19102 | if (this_type) | |
19103 | return this_type; | |
19104 | ||
673bfd45 DE |
19105 | return read_type_die_1 (die, cu); |
19106 | } | |
19107 | ||
19108 | /* Read the type in DIE, CU. | |
19109 | Returns NULL for invalid types. */ | |
19110 | ||
19111 | static struct type * | |
19112 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
19113 | { | |
19114 | struct type *this_type = NULL; | |
19115 | ||
c906108c SS |
19116 | switch (die->tag) |
19117 | { | |
19118 | case DW_TAG_class_type: | |
680b30c7 | 19119 | case DW_TAG_interface_type: |
c906108c SS |
19120 | case DW_TAG_structure_type: |
19121 | case DW_TAG_union_type: | |
f792889a | 19122 | this_type = read_structure_type (die, cu); |
c906108c SS |
19123 | break; |
19124 | case DW_TAG_enumeration_type: | |
f792889a | 19125 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
19126 | break; |
19127 | case DW_TAG_subprogram: | |
19128 | case DW_TAG_subroutine_type: | |
edb3359d | 19129 | case DW_TAG_inlined_subroutine: |
f792889a | 19130 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
19131 | break; |
19132 | case DW_TAG_array_type: | |
f792889a | 19133 | this_type = read_array_type (die, cu); |
c906108c | 19134 | break; |
72019c9c | 19135 | case DW_TAG_set_type: |
f792889a | 19136 | this_type = read_set_type (die, cu); |
72019c9c | 19137 | break; |
c906108c | 19138 | case DW_TAG_pointer_type: |
f792889a | 19139 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
19140 | break; |
19141 | case DW_TAG_ptr_to_member_type: | |
f792889a | 19142 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
19143 | break; |
19144 | case DW_TAG_reference_type: | |
f792889a | 19145 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
19146 | break; |
19147 | case DW_TAG_const_type: | |
f792889a | 19148 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
19149 | break; |
19150 | case DW_TAG_volatile_type: | |
f792889a | 19151 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 19152 | break; |
06d66ee9 TT |
19153 | case DW_TAG_restrict_type: |
19154 | this_type = read_tag_restrict_type (die, cu); | |
19155 | break; | |
c906108c | 19156 | case DW_TAG_string_type: |
f792889a | 19157 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
19158 | break; |
19159 | case DW_TAG_typedef: | |
f792889a | 19160 | this_type = read_typedef (die, cu); |
c906108c | 19161 | break; |
a02abb62 | 19162 | case DW_TAG_subrange_type: |
f792889a | 19163 | this_type = read_subrange_type (die, cu); |
a02abb62 | 19164 | break; |
c906108c | 19165 | case DW_TAG_base_type: |
f792889a | 19166 | this_type = read_base_type (die, cu); |
c906108c | 19167 | break; |
81a17f79 | 19168 | case DW_TAG_unspecified_type: |
f792889a | 19169 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 19170 | break; |
0114d602 DJ |
19171 | case DW_TAG_namespace: |
19172 | this_type = read_namespace_type (die, cu); | |
19173 | break; | |
f55ee35c JK |
19174 | case DW_TAG_module: |
19175 | this_type = read_module_type (die, cu); | |
19176 | break; | |
a2c2acaf MW |
19177 | case DW_TAG_atomic_type: |
19178 | this_type = read_tag_atomic_type (die, cu); | |
19179 | break; | |
c906108c | 19180 | default: |
3e43a32a MS |
19181 | complaint (&symfile_complaints, |
19182 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 19183 | dwarf_tag_name (die->tag)); |
c906108c SS |
19184 | break; |
19185 | } | |
63d06c5c | 19186 | |
f792889a | 19187 | return this_type; |
63d06c5c DC |
19188 | } |
19189 | ||
abc72ce4 DE |
19190 | /* See if we can figure out if the class lives in a namespace. We do |
19191 | this by looking for a member function; its demangled name will | |
19192 | contain namespace info, if there is any. | |
19193 | Return the computed name or NULL. | |
19194 | Space for the result is allocated on the objfile's obstack. | |
19195 | This is the full-die version of guess_partial_die_structure_name. | |
19196 | In this case we know DIE has no useful parent. */ | |
19197 | ||
19198 | static char * | |
19199 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
19200 | { | |
19201 | struct die_info *spec_die; | |
19202 | struct dwarf2_cu *spec_cu; | |
19203 | struct die_info *child; | |
19204 | ||
19205 | spec_cu = cu; | |
19206 | spec_die = die_specification (die, &spec_cu); | |
19207 | if (spec_die != NULL) | |
19208 | { | |
19209 | die = spec_die; | |
19210 | cu = spec_cu; | |
19211 | } | |
19212 | ||
19213 | for (child = die->child; | |
19214 | child != NULL; | |
19215 | child = child->sibling) | |
19216 | { | |
19217 | if (child->tag == DW_TAG_subprogram) | |
19218 | { | |
7d45c7c3 | 19219 | const char *linkage_name; |
abc72ce4 | 19220 | |
7d45c7c3 KB |
19221 | linkage_name = dwarf2_string_attr (child, DW_AT_linkage_name, cu); |
19222 | if (linkage_name == NULL) | |
19223 | linkage_name = dwarf2_string_attr (child, DW_AT_MIPS_linkage_name, | |
19224 | cu); | |
19225 | if (linkage_name != NULL) | |
abc72ce4 DE |
19226 | { |
19227 | char *actual_name | |
19228 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 19229 | linkage_name); |
abc72ce4 DE |
19230 | char *name = NULL; |
19231 | ||
19232 | if (actual_name != NULL) | |
19233 | { | |
15d034d0 | 19234 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
19235 | |
19236 | if (die_name != NULL | |
19237 | && strcmp (die_name, actual_name) != 0) | |
19238 | { | |
19239 | /* Strip off the class name from the full name. | |
19240 | We want the prefix. */ | |
19241 | int die_name_len = strlen (die_name); | |
19242 | int actual_name_len = strlen (actual_name); | |
19243 | ||
19244 | /* Test for '::' as a sanity check. */ | |
19245 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
19246 | && actual_name[actual_name_len |
19247 | - die_name_len - 1] == ':') | |
224c3ddb SM |
19248 | name = (char *) obstack_copy0 ( |
19249 | &cu->objfile->per_bfd->storage_obstack, | |
19250 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
19251 | } |
19252 | } | |
19253 | xfree (actual_name); | |
19254 | return name; | |
19255 | } | |
19256 | } | |
19257 | } | |
19258 | ||
19259 | return NULL; | |
19260 | } | |
19261 | ||
96408a79 SA |
19262 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
19263 | prefix part in such case. See | |
19264 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19265 | ||
19266 | static char * | |
19267 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
19268 | { | |
19269 | struct attribute *attr; | |
e6a959d6 | 19270 | const char *base; |
96408a79 SA |
19271 | |
19272 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
19273 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
19274 | return NULL; | |
19275 | ||
7d45c7c3 | 19276 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
19277 | return NULL; |
19278 | ||
19279 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19280 | if (attr == NULL) | |
19281 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19282 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19283 | return NULL; | |
19284 | ||
19285 | /* dwarf2_name had to be already called. */ | |
19286 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
19287 | ||
19288 | /* Strip the base name, keep any leading namespaces/classes. */ | |
19289 | base = strrchr (DW_STRING (attr), ':'); | |
19290 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
19291 | return ""; | |
19292 | ||
224c3ddb SM |
19293 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
19294 | DW_STRING (attr), | |
19295 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
19296 | } |
19297 | ||
fdde2d81 | 19298 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 19299 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 19300 | |
0114d602 DJ |
19301 | For example, if we're within the method foo() in the following |
19302 | code: | |
19303 | ||
19304 | namespace N { | |
19305 | class C { | |
19306 | void foo () { | |
19307 | } | |
19308 | }; | |
19309 | } | |
19310 | ||
19311 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 19312 | |
0d5cff50 | 19313 | static const char * |
e142c38c | 19314 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 19315 | { |
0114d602 DJ |
19316 | struct die_info *parent, *spec_die; |
19317 | struct dwarf2_cu *spec_cu; | |
19318 | struct type *parent_type; | |
96408a79 | 19319 | char *retval; |
63d06c5c | 19320 | |
9c37b5ae | 19321 | if (cu->language != language_cplus |
c44af4eb TT |
19322 | && cu->language != language_fortran && cu->language != language_d |
19323 | && cu->language != language_rust) | |
0114d602 DJ |
19324 | return ""; |
19325 | ||
96408a79 SA |
19326 | retval = anonymous_struct_prefix (die, cu); |
19327 | if (retval) | |
19328 | return retval; | |
19329 | ||
0114d602 DJ |
19330 | /* We have to be careful in the presence of DW_AT_specification. |
19331 | For example, with GCC 3.4, given the code | |
19332 | ||
19333 | namespace N { | |
19334 | void foo() { | |
19335 | // Definition of N::foo. | |
19336 | } | |
19337 | } | |
19338 | ||
19339 | then we'll have a tree of DIEs like this: | |
19340 | ||
19341 | 1: DW_TAG_compile_unit | |
19342 | 2: DW_TAG_namespace // N | |
19343 | 3: DW_TAG_subprogram // declaration of N::foo | |
19344 | 4: DW_TAG_subprogram // definition of N::foo | |
19345 | DW_AT_specification // refers to die #3 | |
19346 | ||
19347 | Thus, when processing die #4, we have to pretend that we're in | |
19348 | the context of its DW_AT_specification, namely the contex of die | |
19349 | #3. */ | |
19350 | spec_cu = cu; | |
19351 | spec_die = die_specification (die, &spec_cu); | |
19352 | if (spec_die == NULL) | |
19353 | parent = die->parent; | |
19354 | else | |
63d06c5c | 19355 | { |
0114d602 DJ |
19356 | parent = spec_die->parent; |
19357 | cu = spec_cu; | |
63d06c5c | 19358 | } |
0114d602 DJ |
19359 | |
19360 | if (parent == NULL) | |
19361 | return ""; | |
98bfdba5 PA |
19362 | else if (parent->building_fullname) |
19363 | { | |
19364 | const char *name; | |
19365 | const char *parent_name; | |
19366 | ||
19367 | /* It has been seen on RealView 2.2 built binaries, | |
19368 | DW_TAG_template_type_param types actually _defined_ as | |
19369 | children of the parent class: | |
19370 | ||
19371 | enum E {}; | |
19372 | template class <class Enum> Class{}; | |
19373 | Class<enum E> class_e; | |
19374 | ||
19375 | 1: DW_TAG_class_type (Class) | |
19376 | 2: DW_TAG_enumeration_type (E) | |
19377 | 3: DW_TAG_enumerator (enum1:0) | |
19378 | 3: DW_TAG_enumerator (enum2:1) | |
19379 | ... | |
19380 | 2: DW_TAG_template_type_param | |
19381 | DW_AT_type DW_FORM_ref_udata (E) | |
19382 | ||
19383 | Besides being broken debug info, it can put GDB into an | |
19384 | infinite loop. Consider: | |
19385 | ||
19386 | When we're building the full name for Class<E>, we'll start | |
19387 | at Class, and go look over its template type parameters, | |
19388 | finding E. We'll then try to build the full name of E, and | |
19389 | reach here. We're now trying to build the full name of E, | |
19390 | and look over the parent DIE for containing scope. In the | |
19391 | broken case, if we followed the parent DIE of E, we'd again | |
19392 | find Class, and once again go look at its template type | |
19393 | arguments, etc., etc. Simply don't consider such parent die | |
19394 | as source-level parent of this die (it can't be, the language | |
19395 | doesn't allow it), and break the loop here. */ | |
19396 | name = dwarf2_name (die, cu); | |
19397 | parent_name = dwarf2_name (parent, cu); | |
19398 | complaint (&symfile_complaints, | |
19399 | _("template param type '%s' defined within parent '%s'"), | |
19400 | name ? name : "<unknown>", | |
19401 | parent_name ? parent_name : "<unknown>"); | |
19402 | return ""; | |
19403 | } | |
63d06c5c | 19404 | else |
0114d602 DJ |
19405 | switch (parent->tag) |
19406 | { | |
63d06c5c | 19407 | case DW_TAG_namespace: |
0114d602 | 19408 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
19409 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
19410 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
19411 | Work around this problem here. */ | |
19412 | if (cu->language == language_cplus | |
19413 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
19414 | return ""; | |
0114d602 DJ |
19415 | /* We give a name to even anonymous namespaces. */ |
19416 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 19417 | case DW_TAG_class_type: |
680b30c7 | 19418 | case DW_TAG_interface_type: |
63d06c5c | 19419 | case DW_TAG_structure_type: |
0114d602 | 19420 | case DW_TAG_union_type: |
f55ee35c | 19421 | case DW_TAG_module: |
0114d602 DJ |
19422 | parent_type = read_type_die (parent, cu); |
19423 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
19424 | return TYPE_TAG_NAME (parent_type); | |
19425 | else | |
19426 | /* An anonymous structure is only allowed non-static data | |
19427 | members; no typedefs, no member functions, et cetera. | |
19428 | So it does not need a prefix. */ | |
19429 | return ""; | |
abc72ce4 | 19430 | case DW_TAG_compile_unit: |
95554aad | 19431 | case DW_TAG_partial_unit: |
abc72ce4 DE |
19432 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
19433 | if (cu->language == language_cplus | |
8b70b953 | 19434 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
19435 | && die->child != NULL |
19436 | && (die->tag == DW_TAG_class_type | |
19437 | || die->tag == DW_TAG_structure_type | |
19438 | || die->tag == DW_TAG_union_type)) | |
19439 | { | |
19440 | char *name = guess_full_die_structure_name (die, cu); | |
19441 | if (name != NULL) | |
19442 | return name; | |
19443 | } | |
19444 | return ""; | |
3d567982 TT |
19445 | case DW_TAG_enumeration_type: |
19446 | parent_type = read_type_die (parent, cu); | |
19447 | if (TYPE_DECLARED_CLASS (parent_type)) | |
19448 | { | |
19449 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
19450 | return TYPE_TAG_NAME (parent_type); | |
19451 | return ""; | |
19452 | } | |
19453 | /* Fall through. */ | |
63d06c5c | 19454 | default: |
8176b9b8 | 19455 | return determine_prefix (parent, cu); |
63d06c5c | 19456 | } |
63d06c5c DC |
19457 | } |
19458 | ||
3e43a32a MS |
19459 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
19460 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
19461 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
19462 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
19463 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 19464 | |
f55ee35c | 19465 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
19466 | |
19467 | static char * | |
f55ee35c JK |
19468 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
19469 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 19470 | { |
f55ee35c | 19471 | const char *lead = ""; |
5c315b68 | 19472 | const char *sep; |
63d06c5c | 19473 | |
3e43a32a MS |
19474 | if (suffix == NULL || suffix[0] == '\0' |
19475 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 19476 | sep = ""; |
45280282 IB |
19477 | else if (cu->language == language_d) |
19478 | { | |
19479 | /* For D, the 'main' function could be defined in any module, but it | |
19480 | should never be prefixed. */ | |
19481 | if (strcmp (suffix, "D main") == 0) | |
19482 | { | |
19483 | prefix = ""; | |
19484 | sep = ""; | |
19485 | } | |
19486 | else | |
19487 | sep = "."; | |
19488 | } | |
f55ee35c JK |
19489 | else if (cu->language == language_fortran && physname) |
19490 | { | |
19491 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
19492 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
19493 | ||
19494 | lead = "__"; | |
19495 | sep = "_MOD_"; | |
19496 | } | |
987504bb JJ |
19497 | else |
19498 | sep = "::"; | |
63d06c5c | 19499 | |
6dd47d34 DE |
19500 | if (prefix == NULL) |
19501 | prefix = ""; | |
19502 | if (suffix == NULL) | |
19503 | suffix = ""; | |
19504 | ||
987504bb JJ |
19505 | if (obs == NULL) |
19506 | { | |
3e43a32a | 19507 | char *retval |
224c3ddb SM |
19508 | = ((char *) |
19509 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 19510 | |
f55ee35c JK |
19511 | strcpy (retval, lead); |
19512 | strcat (retval, prefix); | |
6dd47d34 DE |
19513 | strcat (retval, sep); |
19514 | strcat (retval, suffix); | |
63d06c5c DC |
19515 | return retval; |
19516 | } | |
987504bb JJ |
19517 | else |
19518 | { | |
19519 | /* We have an obstack. */ | |
f55ee35c | 19520 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 19521 | } |
63d06c5c DC |
19522 | } |
19523 | ||
c906108c SS |
19524 | /* Return sibling of die, NULL if no sibling. */ |
19525 | ||
f9aca02d | 19526 | static struct die_info * |
fba45db2 | 19527 | sibling_die (struct die_info *die) |
c906108c | 19528 | { |
639d11d3 | 19529 | return die->sibling; |
c906108c SS |
19530 | } |
19531 | ||
71c25dea TT |
19532 | /* Get name of a die, return NULL if not found. */ |
19533 | ||
15d034d0 TT |
19534 | static const char * |
19535 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
19536 | struct obstack *obstack) |
19537 | { | |
19538 | if (name && cu->language == language_cplus) | |
19539 | { | |
2f408ecb | 19540 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 19541 | |
2f408ecb | 19542 | if (!canon_name.empty ()) |
71c25dea | 19543 | { |
2f408ecb PA |
19544 | if (canon_name != name) |
19545 | name = (const char *) obstack_copy0 (obstack, | |
19546 | canon_name.c_str (), | |
19547 | canon_name.length ()); | |
71c25dea TT |
19548 | } |
19549 | } | |
19550 | ||
19551 | return name; | |
c906108c SS |
19552 | } |
19553 | ||
96553a0c DE |
19554 | /* Get name of a die, return NULL if not found. |
19555 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 19556 | |
15d034d0 | 19557 | static const char * |
e142c38c | 19558 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
19559 | { |
19560 | struct attribute *attr; | |
19561 | ||
e142c38c | 19562 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 19563 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 19564 | && die->tag != DW_TAG_namespace |
53832f31 TT |
19565 | && die->tag != DW_TAG_class_type |
19566 | && die->tag != DW_TAG_interface_type | |
19567 | && die->tag != DW_TAG_structure_type | |
19568 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
19569 | return NULL; |
19570 | ||
19571 | switch (die->tag) | |
19572 | { | |
19573 | case DW_TAG_compile_unit: | |
95554aad | 19574 | case DW_TAG_partial_unit: |
71c25dea TT |
19575 | /* Compilation units have a DW_AT_name that is a filename, not |
19576 | a source language identifier. */ | |
19577 | case DW_TAG_enumeration_type: | |
19578 | case DW_TAG_enumerator: | |
19579 | /* These tags always have simple identifiers already; no need | |
19580 | to canonicalize them. */ | |
19581 | return DW_STRING (attr); | |
907af001 | 19582 | |
96553a0c DE |
19583 | case DW_TAG_namespace: |
19584 | if (attr != NULL && DW_STRING (attr) != NULL) | |
19585 | return DW_STRING (attr); | |
19586 | return CP_ANONYMOUS_NAMESPACE_STR; | |
19587 | ||
907af001 UW |
19588 | case DW_TAG_class_type: |
19589 | case DW_TAG_interface_type: | |
19590 | case DW_TAG_structure_type: | |
19591 | case DW_TAG_union_type: | |
19592 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
19593 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
19594 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
19595 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 19596 | if (attr && DW_STRING (attr) |
61012eef GB |
19597 | && (startswith (DW_STRING (attr), "._") |
19598 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 19599 | return NULL; |
53832f31 TT |
19600 | |
19601 | /* GCC might emit a nameless typedef that has a linkage name. See | |
19602 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19603 | if (!attr || DW_STRING (attr) == NULL) | |
19604 | { | |
df5c6c50 | 19605 | char *demangled = NULL; |
53832f31 TT |
19606 | |
19607 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19608 | if (attr == NULL) | |
19609 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19610 | ||
19611 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19612 | return NULL; | |
19613 | ||
df5c6c50 JK |
19614 | /* Avoid demangling DW_STRING (attr) the second time on a second |
19615 | call for the same DIE. */ | |
19616 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 19617 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
19618 | |
19619 | if (demangled) | |
19620 | { | |
e6a959d6 | 19621 | const char *base; |
96408a79 | 19622 | |
53832f31 | 19623 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 19624 | DW_STRING (attr) |
224c3ddb SM |
19625 | = ((const char *) |
19626 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
19627 | demangled, strlen (demangled))); | |
53832f31 TT |
19628 | DW_STRING_IS_CANONICAL (attr) = 1; |
19629 | xfree (demangled); | |
96408a79 SA |
19630 | |
19631 | /* Strip any leading namespaces/classes, keep only the base name. | |
19632 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
19633 | base = strrchr (DW_STRING (attr), ':'); | |
19634 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
19635 | return &base[1]; | |
19636 | else | |
19637 | return DW_STRING (attr); | |
53832f31 TT |
19638 | } |
19639 | } | |
907af001 UW |
19640 | break; |
19641 | ||
71c25dea | 19642 | default: |
907af001 UW |
19643 | break; |
19644 | } | |
19645 | ||
19646 | if (!DW_STRING_IS_CANONICAL (attr)) | |
19647 | { | |
19648 | DW_STRING (attr) | |
19649 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 19650 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 19651 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 19652 | } |
907af001 | 19653 | return DW_STRING (attr); |
9219021c DC |
19654 | } |
19655 | ||
19656 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
19657 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
19658 | containing the return value on output. */ | |
9219021c DC |
19659 | |
19660 | static struct die_info * | |
f2f0e013 | 19661 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
19662 | { |
19663 | struct attribute *attr; | |
9219021c | 19664 | |
f2f0e013 | 19665 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
19666 | if (attr == NULL) |
19667 | return NULL; | |
19668 | ||
f2f0e013 | 19669 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
19670 | } |
19671 | ||
c906108c SS |
19672 | /* Convert a DIE tag into its string name. */ |
19673 | ||
f39c6ffd | 19674 | static const char * |
aa1ee363 | 19675 | dwarf_tag_name (unsigned tag) |
c906108c | 19676 | { |
f39c6ffd TT |
19677 | const char *name = get_DW_TAG_name (tag); |
19678 | ||
19679 | if (name == NULL) | |
19680 | return "DW_TAG_<unknown>"; | |
19681 | ||
19682 | return name; | |
c906108c SS |
19683 | } |
19684 | ||
19685 | /* Convert a DWARF attribute code into its string name. */ | |
19686 | ||
f39c6ffd | 19687 | static const char * |
aa1ee363 | 19688 | dwarf_attr_name (unsigned attr) |
c906108c | 19689 | { |
f39c6ffd TT |
19690 | const char *name; |
19691 | ||
c764a876 | 19692 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
19693 | if (attr == DW_AT_MIPS_fde) |
19694 | return "DW_AT_MIPS_fde"; | |
19695 | #else | |
19696 | if (attr == DW_AT_HP_block_index) | |
19697 | return "DW_AT_HP_block_index"; | |
c764a876 | 19698 | #endif |
f39c6ffd TT |
19699 | |
19700 | name = get_DW_AT_name (attr); | |
19701 | ||
19702 | if (name == NULL) | |
19703 | return "DW_AT_<unknown>"; | |
19704 | ||
19705 | return name; | |
c906108c SS |
19706 | } |
19707 | ||
19708 | /* Convert a DWARF value form code into its string name. */ | |
19709 | ||
f39c6ffd | 19710 | static const char * |
aa1ee363 | 19711 | dwarf_form_name (unsigned form) |
c906108c | 19712 | { |
f39c6ffd TT |
19713 | const char *name = get_DW_FORM_name (form); |
19714 | ||
19715 | if (name == NULL) | |
19716 | return "DW_FORM_<unknown>"; | |
19717 | ||
19718 | return name; | |
c906108c SS |
19719 | } |
19720 | ||
19721 | static char * | |
fba45db2 | 19722 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
19723 | { |
19724 | if (mybool) | |
19725 | return "TRUE"; | |
19726 | else | |
19727 | return "FALSE"; | |
19728 | } | |
19729 | ||
19730 | /* Convert a DWARF type code into its string name. */ | |
19731 | ||
f39c6ffd | 19732 | static const char * |
aa1ee363 | 19733 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 19734 | { |
f39c6ffd | 19735 | const char *name = get_DW_ATE_name (enc); |
c906108c | 19736 | |
f39c6ffd TT |
19737 | if (name == NULL) |
19738 | return "DW_ATE_<unknown>"; | |
c906108c | 19739 | |
f39c6ffd | 19740 | return name; |
c906108c | 19741 | } |
c906108c | 19742 | |
f9aca02d | 19743 | static void |
d97bc12b | 19744 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
19745 | { |
19746 | unsigned int i; | |
19747 | ||
d97bc12b DE |
19748 | print_spaces (indent, f); |
19749 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 19750 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
19751 | |
19752 | if (die->parent != NULL) | |
19753 | { | |
19754 | print_spaces (indent, f); | |
19755 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 19756 | die->parent->offset.sect_off); |
d97bc12b DE |
19757 | } |
19758 | ||
19759 | print_spaces (indent, f); | |
19760 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 19761 | dwarf_bool_name (die->child != NULL)); |
c906108c | 19762 | |
d97bc12b DE |
19763 | print_spaces (indent, f); |
19764 | fprintf_unfiltered (f, " attributes:\n"); | |
19765 | ||
c906108c SS |
19766 | for (i = 0; i < die->num_attrs; ++i) |
19767 | { | |
d97bc12b DE |
19768 | print_spaces (indent, f); |
19769 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
19770 | dwarf_attr_name (die->attrs[i].name), |
19771 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 19772 | |
c906108c SS |
19773 | switch (die->attrs[i].form) |
19774 | { | |
c906108c | 19775 | case DW_FORM_addr: |
3019eac3 | 19776 | case DW_FORM_GNU_addr_index: |
d97bc12b | 19777 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 19778 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
19779 | break; |
19780 | case DW_FORM_block2: | |
19781 | case DW_FORM_block4: | |
19782 | case DW_FORM_block: | |
19783 | case DW_FORM_block1: | |
56eb65bd SP |
19784 | fprintf_unfiltered (f, "block: size %s", |
19785 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 19786 | break; |
2dc7f7b3 | 19787 | case DW_FORM_exprloc: |
56eb65bd SP |
19788 | fprintf_unfiltered (f, "expression: size %s", |
19789 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 19790 | break; |
4568ecf9 DE |
19791 | case DW_FORM_ref_addr: |
19792 | fprintf_unfiltered (f, "ref address: "); | |
19793 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19794 | break; | |
36586728 TT |
19795 | case DW_FORM_GNU_ref_alt: |
19796 | fprintf_unfiltered (f, "alt ref address: "); | |
19797 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19798 | break; | |
10b3939b DJ |
19799 | case DW_FORM_ref1: |
19800 | case DW_FORM_ref2: | |
19801 | case DW_FORM_ref4: | |
4568ecf9 DE |
19802 | case DW_FORM_ref8: |
19803 | case DW_FORM_ref_udata: | |
d97bc12b | 19804 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 19805 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 19806 | break; |
c906108c SS |
19807 | case DW_FORM_data1: |
19808 | case DW_FORM_data2: | |
19809 | case DW_FORM_data4: | |
ce5d95e1 | 19810 | case DW_FORM_data8: |
c906108c SS |
19811 | case DW_FORM_udata: |
19812 | case DW_FORM_sdata: | |
43bbcdc2 PH |
19813 | fprintf_unfiltered (f, "constant: %s", |
19814 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 19815 | break; |
2dc7f7b3 TT |
19816 | case DW_FORM_sec_offset: |
19817 | fprintf_unfiltered (f, "section offset: %s", | |
19818 | pulongest (DW_UNSND (&die->attrs[i]))); | |
19819 | break; | |
55f1336d | 19820 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
19821 | fprintf_unfiltered (f, "signature: %s", |
19822 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 19823 | break; |
c906108c | 19824 | case DW_FORM_string: |
4bdf3d34 | 19825 | case DW_FORM_strp: |
3019eac3 | 19826 | case DW_FORM_GNU_str_index: |
36586728 | 19827 | case DW_FORM_GNU_strp_alt: |
8285870a | 19828 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 19829 | DW_STRING (&die->attrs[i]) |
8285870a JK |
19830 | ? DW_STRING (&die->attrs[i]) : "", |
19831 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
19832 | break; |
19833 | case DW_FORM_flag: | |
19834 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 19835 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 19836 | else |
d97bc12b | 19837 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 19838 | break; |
2dc7f7b3 TT |
19839 | case DW_FORM_flag_present: |
19840 | fprintf_unfiltered (f, "flag: TRUE"); | |
19841 | break; | |
a8329558 | 19842 | case DW_FORM_indirect: |
0963b4bd MS |
19843 | /* The reader will have reduced the indirect form to |
19844 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
19845 | fprintf_unfiltered (f, |
19846 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 19847 | break; |
c906108c | 19848 | default: |
d97bc12b | 19849 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 19850 | die->attrs[i].form); |
d97bc12b | 19851 | break; |
c906108c | 19852 | } |
d97bc12b | 19853 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
19854 | } |
19855 | } | |
19856 | ||
f9aca02d | 19857 | static void |
d97bc12b | 19858 | dump_die_for_error (struct die_info *die) |
c906108c | 19859 | { |
d97bc12b DE |
19860 | dump_die_shallow (gdb_stderr, 0, die); |
19861 | } | |
19862 | ||
19863 | static void | |
19864 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
19865 | { | |
19866 | int indent = level * 4; | |
19867 | ||
19868 | gdb_assert (die != NULL); | |
19869 | ||
19870 | if (level >= max_level) | |
19871 | return; | |
19872 | ||
19873 | dump_die_shallow (f, indent, die); | |
19874 | ||
19875 | if (die->child != NULL) | |
c906108c | 19876 | { |
d97bc12b DE |
19877 | print_spaces (indent, f); |
19878 | fprintf_unfiltered (f, " Children:"); | |
19879 | if (level + 1 < max_level) | |
19880 | { | |
19881 | fprintf_unfiltered (f, "\n"); | |
19882 | dump_die_1 (f, level + 1, max_level, die->child); | |
19883 | } | |
19884 | else | |
19885 | { | |
3e43a32a MS |
19886 | fprintf_unfiltered (f, |
19887 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
19888 | } |
19889 | } | |
19890 | ||
19891 | if (die->sibling != NULL && level > 0) | |
19892 | { | |
19893 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
19894 | } |
19895 | } | |
19896 | ||
d97bc12b DE |
19897 | /* This is called from the pdie macro in gdbinit.in. |
19898 | It's not static so gcc will keep a copy callable from gdb. */ | |
19899 | ||
19900 | void | |
19901 | dump_die (struct die_info *die, int max_level) | |
19902 | { | |
19903 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
19904 | } | |
19905 | ||
f9aca02d | 19906 | static void |
51545339 | 19907 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19908 | { |
51545339 | 19909 | void **slot; |
c906108c | 19910 | |
b64f50a1 JK |
19911 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
19912 | INSERT); | |
51545339 DJ |
19913 | |
19914 | *slot = die; | |
c906108c SS |
19915 | } |
19916 | ||
b64f50a1 JK |
19917 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
19918 | required kind. */ | |
19919 | ||
19920 | static sect_offset | |
ff39bb5e | 19921 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 19922 | { |
4568ecf9 | 19923 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 19924 | |
7771576e | 19925 | if (attr_form_is_ref (attr)) |
b64f50a1 | 19926 | return retval; |
93311388 | 19927 | |
b64f50a1 | 19928 | retval.sect_off = 0; |
93311388 DE |
19929 | complaint (&symfile_complaints, |
19930 | _("unsupported die ref attribute form: '%s'"), | |
19931 | dwarf_form_name (attr->form)); | |
b64f50a1 | 19932 | return retval; |
c906108c SS |
19933 | } |
19934 | ||
43bbcdc2 PH |
19935 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
19936 | * the value held by the attribute is not constant. */ | |
a02abb62 | 19937 | |
43bbcdc2 | 19938 | static LONGEST |
ff39bb5e | 19939 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
19940 | { |
19941 | if (attr->form == DW_FORM_sdata) | |
19942 | return DW_SND (attr); | |
19943 | else if (attr->form == DW_FORM_udata | |
19944 | || attr->form == DW_FORM_data1 | |
19945 | || attr->form == DW_FORM_data2 | |
19946 | || attr->form == DW_FORM_data4 | |
19947 | || attr->form == DW_FORM_data8) | |
19948 | return DW_UNSND (attr); | |
19949 | else | |
19950 | { | |
3e43a32a MS |
19951 | complaint (&symfile_complaints, |
19952 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
19953 | dwarf_form_name (attr->form)); |
19954 | return default_value; | |
19955 | } | |
19956 | } | |
19957 | ||
348e048f DE |
19958 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
19959 | On entry *REF_CU is the CU of SRC_DIE. | |
19960 | On exit *REF_CU is the CU of the result. */ | |
19961 | ||
19962 | static struct die_info * | |
ff39bb5e | 19963 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
19964 | struct dwarf2_cu **ref_cu) |
19965 | { | |
19966 | struct die_info *die; | |
19967 | ||
7771576e | 19968 | if (attr_form_is_ref (attr)) |
348e048f | 19969 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 19970 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
19971 | die = follow_die_sig (src_die, attr, ref_cu); |
19972 | else | |
19973 | { | |
19974 | dump_die_for_error (src_die); | |
19975 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 19976 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
19977 | } |
19978 | ||
19979 | return die; | |
03dd20cc DJ |
19980 | } |
19981 | ||
5c631832 | 19982 | /* Follow reference OFFSET. |
673bfd45 DE |
19983 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
19984 | On exit *REF_CU is the CU of the result. | |
19985 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 19986 | |
f9aca02d | 19987 | static struct die_info * |
36586728 TT |
19988 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
19989 | struct dwarf2_cu **ref_cu) | |
c906108c | 19990 | { |
10b3939b | 19991 | struct die_info temp_die; |
f2f0e013 | 19992 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 19993 | |
348e048f DE |
19994 | gdb_assert (cu->per_cu != NULL); |
19995 | ||
98bfdba5 PA |
19996 | target_cu = cu; |
19997 | ||
3019eac3 | 19998 | if (cu->per_cu->is_debug_types) |
348e048f DE |
19999 | { |
20000 | /* .debug_types CUs cannot reference anything outside their CU. | |
20001 | If they need to, they have to reference a signatured type via | |
55f1336d | 20002 | DW_FORM_ref_sig8. */ |
348e048f | 20003 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 20004 | return NULL; |
348e048f | 20005 | } |
36586728 TT |
20006 | else if (offset_in_dwz != cu->per_cu->is_dwz |
20007 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
20008 | { |
20009 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 20010 | |
36586728 TT |
20011 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
20012 | cu->objfile); | |
03dd20cc DJ |
20013 | |
20014 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
20015 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
20016 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 20017 | |
10b3939b DJ |
20018 | target_cu = per_cu->cu; |
20019 | } | |
98bfdba5 PA |
20020 | else if (cu->dies == NULL) |
20021 | { | |
20022 | /* We're loading full DIEs during partial symbol reading. */ | |
20023 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 20024 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 20025 | } |
c906108c | 20026 | |
f2f0e013 | 20027 | *ref_cu = target_cu; |
51545339 | 20028 | temp_die.offset = offset; |
9a3c8263 SM |
20029 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
20030 | &temp_die, offset.sect_off); | |
5c631832 | 20031 | } |
10b3939b | 20032 | |
5c631832 JK |
20033 | /* Follow reference attribute ATTR of SRC_DIE. |
20034 | On entry *REF_CU is the CU of SRC_DIE. | |
20035 | On exit *REF_CU is the CU of the result. */ | |
20036 | ||
20037 | static struct die_info * | |
ff39bb5e | 20038 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
20039 | struct dwarf2_cu **ref_cu) |
20040 | { | |
b64f50a1 | 20041 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
20042 | struct dwarf2_cu *cu = *ref_cu; |
20043 | struct die_info *die; | |
20044 | ||
36586728 TT |
20045 | die = follow_die_offset (offset, |
20046 | (attr->form == DW_FORM_GNU_ref_alt | |
20047 | || cu->per_cu->is_dwz), | |
20048 | ref_cu); | |
5c631832 JK |
20049 | if (!die) |
20050 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
20051 | "at 0x%x [in module %s]"), | |
4262abfb JK |
20052 | offset.sect_off, src_die->offset.sect_off, |
20053 | objfile_name (cu->objfile)); | |
348e048f | 20054 | |
5c631832 JK |
20055 | return die; |
20056 | } | |
20057 | ||
d83e736b JK |
20058 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
20059 | Returned value is intended for DW_OP_call*. Returned | |
20060 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
20061 | |
20062 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
20063 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
20064 | struct dwarf2_per_cu_data *per_cu, | |
20065 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20066 | void *baton) | |
5c631832 | 20067 | { |
918dd910 | 20068 | struct dwarf2_cu *cu; |
5c631832 JK |
20069 | struct die_info *die; |
20070 | struct attribute *attr; | |
20071 | struct dwarf2_locexpr_baton retval; | |
20072 | ||
8cf6f0b1 TT |
20073 | dw2_setup (per_cu->objfile); |
20074 | ||
918dd910 JK |
20075 | if (per_cu->cu == NULL) |
20076 | load_cu (per_cu); | |
20077 | cu = per_cu->cu; | |
cc12ce38 DE |
20078 | if (cu == NULL) |
20079 | { | |
20080 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20081 | Instead just throw an error, not much else we can do. */ | |
20082 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
20083 | offset.sect_off, objfile_name (per_cu->objfile)); | |
20084 | } | |
918dd910 | 20085 | |
36586728 | 20086 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
20087 | if (!die) |
20088 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 20089 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
20090 | |
20091 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
20092 | if (!attr) | |
20093 | { | |
e103e986 JK |
20094 | /* DWARF: "If there is no such attribute, then there is no effect.". |
20095 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 20096 | |
e103e986 | 20097 | retval.data = NULL; |
5c631832 JK |
20098 | retval.size = 0; |
20099 | } | |
8cf6f0b1 TT |
20100 | else if (attr_form_is_section_offset (attr)) |
20101 | { | |
20102 | struct dwarf2_loclist_baton loclist_baton; | |
20103 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
20104 | size_t size; | |
20105 | ||
20106 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
20107 | ||
20108 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
20109 | &size, pc); | |
20110 | retval.size = size; | |
20111 | } | |
5c631832 JK |
20112 | else |
20113 | { | |
20114 | if (!attr_form_is_block (attr)) | |
20115 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
20116 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 20117 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
20118 | |
20119 | retval.data = DW_BLOCK (attr)->data; | |
20120 | retval.size = DW_BLOCK (attr)->size; | |
20121 | } | |
20122 | retval.per_cu = cu->per_cu; | |
918dd910 | 20123 | |
918dd910 JK |
20124 | age_cached_comp_units (); |
20125 | ||
5c631832 | 20126 | return retval; |
348e048f DE |
20127 | } |
20128 | ||
8b9737bf TT |
20129 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
20130 | offset. */ | |
20131 | ||
20132 | struct dwarf2_locexpr_baton | |
20133 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
20134 | struct dwarf2_per_cu_data *per_cu, | |
20135 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20136 | void *baton) | |
20137 | { | |
20138 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
20139 | ||
20140 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
20141 | } | |
20142 | ||
b6807d98 TT |
20143 | /* Write a constant of a given type as target-ordered bytes into |
20144 | OBSTACK. */ | |
20145 | ||
20146 | static const gdb_byte * | |
20147 | write_constant_as_bytes (struct obstack *obstack, | |
20148 | enum bfd_endian byte_order, | |
20149 | struct type *type, | |
20150 | ULONGEST value, | |
20151 | LONGEST *len) | |
20152 | { | |
20153 | gdb_byte *result; | |
20154 | ||
20155 | *len = TYPE_LENGTH (type); | |
224c3ddb | 20156 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20157 | store_unsigned_integer (result, *len, byte_order, value); |
20158 | ||
20159 | return result; | |
20160 | } | |
20161 | ||
20162 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
20163 | pointer to the constant bytes and set LEN to the length of the | |
20164 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
20165 | does not have a DW_AT_const_value, return NULL. */ | |
20166 | ||
20167 | const gdb_byte * | |
20168 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
20169 | struct dwarf2_per_cu_data *per_cu, | |
20170 | struct obstack *obstack, | |
20171 | LONGEST *len) | |
20172 | { | |
20173 | struct dwarf2_cu *cu; | |
20174 | struct die_info *die; | |
20175 | struct attribute *attr; | |
20176 | const gdb_byte *result = NULL; | |
20177 | struct type *type; | |
20178 | LONGEST value; | |
20179 | enum bfd_endian byte_order; | |
20180 | ||
20181 | dw2_setup (per_cu->objfile); | |
20182 | ||
20183 | if (per_cu->cu == NULL) | |
20184 | load_cu (per_cu); | |
20185 | cu = per_cu->cu; | |
cc12ce38 DE |
20186 | if (cu == NULL) |
20187 | { | |
20188 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20189 | Instead just throw an error, not much else we can do. */ | |
20190 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
20191 | offset.sect_off, objfile_name (per_cu->objfile)); | |
20192 | } | |
b6807d98 TT |
20193 | |
20194 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
20195 | if (!die) | |
20196 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 20197 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
20198 | |
20199 | ||
20200 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
20201 | if (attr == NULL) | |
20202 | return NULL; | |
20203 | ||
20204 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
20205 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20206 | ||
20207 | switch (attr->form) | |
20208 | { | |
20209 | case DW_FORM_addr: | |
20210 | case DW_FORM_GNU_addr_index: | |
20211 | { | |
20212 | gdb_byte *tem; | |
20213 | ||
20214 | *len = cu->header.addr_size; | |
224c3ddb | 20215 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20216 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
20217 | result = tem; | |
20218 | } | |
20219 | break; | |
20220 | case DW_FORM_string: | |
20221 | case DW_FORM_strp: | |
20222 | case DW_FORM_GNU_str_index: | |
20223 | case DW_FORM_GNU_strp_alt: | |
20224 | /* DW_STRING is already allocated on the objfile obstack, point | |
20225 | directly to it. */ | |
20226 | result = (const gdb_byte *) DW_STRING (attr); | |
20227 | *len = strlen (DW_STRING (attr)); | |
20228 | break; | |
20229 | case DW_FORM_block1: | |
20230 | case DW_FORM_block2: | |
20231 | case DW_FORM_block4: | |
20232 | case DW_FORM_block: | |
20233 | case DW_FORM_exprloc: | |
20234 | result = DW_BLOCK (attr)->data; | |
20235 | *len = DW_BLOCK (attr)->size; | |
20236 | break; | |
20237 | ||
20238 | /* The DW_AT_const_value attributes are supposed to carry the | |
20239 | symbol's value "represented as it would be on the target | |
20240 | architecture." By the time we get here, it's already been | |
20241 | converted to host endianness, so we just need to sign- or | |
20242 | zero-extend it as appropriate. */ | |
20243 | case DW_FORM_data1: | |
20244 | type = die_type (die, cu); | |
20245 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
20246 | if (result == NULL) | |
20247 | result = write_constant_as_bytes (obstack, byte_order, | |
20248 | type, value, len); | |
20249 | break; | |
20250 | case DW_FORM_data2: | |
20251 | type = die_type (die, cu); | |
20252 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
20253 | if (result == NULL) | |
20254 | result = write_constant_as_bytes (obstack, byte_order, | |
20255 | type, value, len); | |
20256 | break; | |
20257 | case DW_FORM_data4: | |
20258 | type = die_type (die, cu); | |
20259 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
20260 | if (result == NULL) | |
20261 | result = write_constant_as_bytes (obstack, byte_order, | |
20262 | type, value, len); | |
20263 | break; | |
20264 | case DW_FORM_data8: | |
20265 | type = die_type (die, cu); | |
20266 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
20267 | if (result == NULL) | |
20268 | result = write_constant_as_bytes (obstack, byte_order, | |
20269 | type, value, len); | |
20270 | break; | |
20271 | ||
20272 | case DW_FORM_sdata: | |
20273 | type = die_type (die, cu); | |
20274 | result = write_constant_as_bytes (obstack, byte_order, | |
20275 | type, DW_SND (attr), len); | |
20276 | break; | |
20277 | ||
20278 | case DW_FORM_udata: | |
20279 | type = die_type (die, cu); | |
20280 | result = write_constant_as_bytes (obstack, byte_order, | |
20281 | type, DW_UNSND (attr), len); | |
20282 | break; | |
20283 | ||
20284 | default: | |
20285 | complaint (&symfile_complaints, | |
20286 | _("unsupported const value attribute form: '%s'"), | |
20287 | dwarf_form_name (attr->form)); | |
20288 | break; | |
20289 | } | |
20290 | ||
20291 | return result; | |
20292 | } | |
20293 | ||
8a9b8146 TT |
20294 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
20295 | PER_CU. */ | |
20296 | ||
20297 | struct type * | |
b64f50a1 | 20298 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
20299 | struct dwarf2_per_cu_data *per_cu) |
20300 | { | |
b64f50a1 JK |
20301 | sect_offset die_offset_sect; |
20302 | ||
8a9b8146 | 20303 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
20304 | |
20305 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
20306 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
20307 | } |
20308 | ||
ac9ec31b | 20309 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 20310 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
20311 | On exit *REF_CU is the CU of the result. |
20312 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
20313 | |
20314 | static struct die_info * | |
ac9ec31b DE |
20315 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
20316 | struct dwarf2_cu **ref_cu) | |
348e048f | 20317 | { |
348e048f | 20318 | struct die_info temp_die; |
348e048f DE |
20319 | struct dwarf2_cu *sig_cu; |
20320 | struct die_info *die; | |
20321 | ||
ac9ec31b DE |
20322 | /* While it might be nice to assert sig_type->type == NULL here, |
20323 | we can get here for DW_AT_imported_declaration where we need | |
20324 | the DIE not the type. */ | |
348e048f DE |
20325 | |
20326 | /* If necessary, add it to the queue and load its DIEs. */ | |
20327 | ||
95554aad | 20328 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 20329 | read_signatured_type (sig_type); |
348e048f | 20330 | |
348e048f | 20331 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 20332 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
20333 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
20334 | temp_die.offset = sig_type->type_offset_in_section; | |
9a3c8263 SM |
20335 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
20336 | temp_die.offset.sect_off); | |
348e048f DE |
20337 | if (die) |
20338 | { | |
796a7ff8 DE |
20339 | /* For .gdb_index version 7 keep track of included TUs. |
20340 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
20341 | if (dwarf2_per_objfile->index_table != NULL | |
20342 | && dwarf2_per_objfile->index_table->version <= 7) | |
20343 | { | |
20344 | VEC_safe_push (dwarf2_per_cu_ptr, | |
20345 | (*ref_cu)->per_cu->imported_symtabs, | |
20346 | sig_cu->per_cu); | |
20347 | } | |
20348 | ||
348e048f DE |
20349 | *ref_cu = sig_cu; |
20350 | return die; | |
20351 | } | |
20352 | ||
ac9ec31b DE |
20353 | return NULL; |
20354 | } | |
20355 | ||
20356 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
20357 | On entry *REF_CU is the CU of SRC_DIE. | |
20358 | On exit *REF_CU is the CU of the result. | |
20359 | The result is the DIE of the type. | |
20360 | If the referenced type cannot be found an error is thrown. */ | |
20361 | ||
20362 | static struct die_info * | |
ff39bb5e | 20363 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
20364 | struct dwarf2_cu **ref_cu) |
20365 | { | |
20366 | ULONGEST signature = DW_SIGNATURE (attr); | |
20367 | struct signatured_type *sig_type; | |
20368 | struct die_info *die; | |
20369 | ||
20370 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
20371 | ||
a2ce51a0 | 20372 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
20373 | /* sig_type will be NULL if the signatured type is missing from |
20374 | the debug info. */ | |
20375 | if (sig_type == NULL) | |
20376 | { | |
20377 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
20378 | " from DIE at 0x%x [in module %s]"), | |
20379 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 20380 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
20381 | } |
20382 | ||
20383 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
20384 | if (die == NULL) | |
20385 | { | |
20386 | dump_die_for_error (src_die); | |
20387 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
20388 | " from DIE at 0x%x [in module %s]"), | |
20389 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 20390 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
20391 | } |
20392 | ||
20393 | return die; | |
20394 | } | |
20395 | ||
20396 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
20397 | reading in and processing the type unit if necessary. */ | |
20398 | ||
20399 | static struct type * | |
20400 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
20401 | struct dwarf2_cu *cu) | |
20402 | { | |
20403 | struct signatured_type *sig_type; | |
20404 | struct dwarf2_cu *type_cu; | |
20405 | struct die_info *type_die; | |
20406 | struct type *type; | |
20407 | ||
a2ce51a0 | 20408 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
20409 | /* sig_type will be NULL if the signatured type is missing from |
20410 | the debug info. */ | |
20411 | if (sig_type == NULL) | |
20412 | { | |
20413 | complaint (&symfile_complaints, | |
20414 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
20415 | " from DIE at 0x%x [in module %s]"), | |
20416 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20417 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20418 | return build_error_marker_type (cu, die); |
20419 | } | |
20420 | ||
20421 | /* If we already know the type we're done. */ | |
20422 | if (sig_type->type != NULL) | |
20423 | return sig_type->type; | |
20424 | ||
20425 | type_cu = cu; | |
20426 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
20427 | if (type_die != NULL) | |
20428 | { | |
20429 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
20430 | is created. This is important, for example, because for c++ classes | |
20431 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
20432 | type = read_type_die (type_die, type_cu); | |
20433 | if (type == NULL) | |
20434 | { | |
20435 | complaint (&symfile_complaints, | |
20436 | _("Dwarf Error: Cannot build signatured type %s" | |
20437 | " referenced from DIE at 0x%x [in module %s]"), | |
20438 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20439 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20440 | type = build_error_marker_type (cu, die); |
20441 | } | |
20442 | } | |
20443 | else | |
20444 | { | |
20445 | complaint (&symfile_complaints, | |
20446 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
20447 | " from DIE at 0x%x [in module %s]"), | |
20448 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20449 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20450 | type = build_error_marker_type (cu, die); |
20451 | } | |
20452 | sig_type->type = type; | |
20453 | ||
20454 | return type; | |
20455 | } | |
20456 | ||
20457 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
20458 | reading in and processing the type unit if necessary. */ | |
20459 | ||
20460 | static struct type * | |
ff39bb5e | 20461 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 20462 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
20463 | { |
20464 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 20465 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20466 | { |
20467 | struct dwarf2_cu *type_cu = cu; | |
20468 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
20469 | ||
20470 | return read_type_die (type_die, type_cu); | |
20471 | } | |
20472 | else if (attr->form == DW_FORM_ref_sig8) | |
20473 | { | |
20474 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
20475 | } | |
20476 | else | |
20477 | { | |
20478 | complaint (&symfile_complaints, | |
20479 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
20480 | " at 0x%x [in module %s]"), | |
20481 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 20482 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20483 | return build_error_marker_type (cu, die); |
20484 | } | |
348e048f DE |
20485 | } |
20486 | ||
e5fe5e75 | 20487 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
20488 | |
20489 | static void | |
e5fe5e75 | 20490 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 20491 | { |
52dc124a | 20492 | struct signatured_type *sig_type; |
348e048f | 20493 | |
f4dc4d17 DE |
20494 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
20495 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
20496 | ||
6721b2ec DE |
20497 | /* We have the per_cu, but we need the signatured_type. |
20498 | Fortunately this is an easy translation. */ | |
20499 | gdb_assert (per_cu->is_debug_types); | |
20500 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 20501 | |
6721b2ec | 20502 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20503 | |
52dc124a | 20504 | read_signatured_type (sig_type); |
348e048f | 20505 | |
6721b2ec | 20506 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
20507 | } |
20508 | ||
dee91e82 DE |
20509 | /* die_reader_func for read_signatured_type. |
20510 | This is identical to load_full_comp_unit_reader, | |
20511 | but is kept separate for now. */ | |
348e048f DE |
20512 | |
20513 | static void | |
dee91e82 | 20514 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 20515 | const gdb_byte *info_ptr, |
dee91e82 DE |
20516 | struct die_info *comp_unit_die, |
20517 | int has_children, | |
20518 | void *data) | |
348e048f | 20519 | { |
dee91e82 | 20520 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 20521 | |
dee91e82 DE |
20522 | gdb_assert (cu->die_hash == NULL); |
20523 | cu->die_hash = | |
20524 | htab_create_alloc_ex (cu->header.length / 12, | |
20525 | die_hash, | |
20526 | die_eq, | |
20527 | NULL, | |
20528 | &cu->comp_unit_obstack, | |
20529 | hashtab_obstack_allocate, | |
20530 | dummy_obstack_deallocate); | |
348e048f | 20531 | |
dee91e82 DE |
20532 | if (has_children) |
20533 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
20534 | &info_ptr, comp_unit_die); | |
20535 | cu->dies = comp_unit_die; | |
20536 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
20537 | |
20538 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 20539 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 20540 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
20541 | or we won't be able to build types correctly. |
20542 | Similarly, if we do not read the producer, we can not apply | |
20543 | producer-specific interpretation. */ | |
95554aad | 20544 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 20545 | } |
348e048f | 20546 | |
3019eac3 DE |
20547 | /* Read in a signatured type and build its CU and DIEs. |
20548 | If the type is a stub for the real type in a DWO file, | |
20549 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
20550 | |
20551 | static void | |
20552 | read_signatured_type (struct signatured_type *sig_type) | |
20553 | { | |
20554 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 20555 | |
3019eac3 | 20556 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 20557 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20558 | |
f4dc4d17 DE |
20559 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
20560 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 20561 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
20562 | } |
20563 | ||
c906108c SS |
20564 | /* Decode simple location descriptions. |
20565 | Given a pointer to a dwarf block that defines a location, compute | |
20566 | the location and return the value. | |
20567 | ||
4cecd739 DJ |
20568 | NOTE drow/2003-11-18: This function is called in two situations |
20569 | now: for the address of static or global variables (partial symbols | |
20570 | only) and for offsets into structures which are expected to be | |
20571 | (more or less) constant. The partial symbol case should go away, | |
20572 | and only the constant case should remain. That will let this | |
20573 | function complain more accurately. A few special modes are allowed | |
20574 | without complaint for global variables (for instance, global | |
20575 | register values and thread-local values). | |
c906108c SS |
20576 | |
20577 | A location description containing no operations indicates that the | |
4cecd739 | 20578 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
20579 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
20580 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
20581 | complaint. |
20582 | ||
20583 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
20584 | |
20585 | static CORE_ADDR | |
e7c27a73 | 20586 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 20587 | { |
e7c27a73 | 20588 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
20589 | size_t i; |
20590 | size_t size = blk->size; | |
d521ce57 | 20591 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
20592 | CORE_ADDR stack[64]; |
20593 | int stacki; | |
20594 | unsigned int bytes_read, unsnd; | |
20595 | gdb_byte op; | |
c906108c | 20596 | |
21ae7a4d JK |
20597 | i = 0; |
20598 | stacki = 0; | |
20599 | stack[stacki] = 0; | |
20600 | stack[++stacki] = 0; | |
20601 | ||
20602 | while (i < size) | |
20603 | { | |
20604 | op = data[i++]; | |
20605 | switch (op) | |
20606 | { | |
20607 | case DW_OP_lit0: | |
20608 | case DW_OP_lit1: | |
20609 | case DW_OP_lit2: | |
20610 | case DW_OP_lit3: | |
20611 | case DW_OP_lit4: | |
20612 | case DW_OP_lit5: | |
20613 | case DW_OP_lit6: | |
20614 | case DW_OP_lit7: | |
20615 | case DW_OP_lit8: | |
20616 | case DW_OP_lit9: | |
20617 | case DW_OP_lit10: | |
20618 | case DW_OP_lit11: | |
20619 | case DW_OP_lit12: | |
20620 | case DW_OP_lit13: | |
20621 | case DW_OP_lit14: | |
20622 | case DW_OP_lit15: | |
20623 | case DW_OP_lit16: | |
20624 | case DW_OP_lit17: | |
20625 | case DW_OP_lit18: | |
20626 | case DW_OP_lit19: | |
20627 | case DW_OP_lit20: | |
20628 | case DW_OP_lit21: | |
20629 | case DW_OP_lit22: | |
20630 | case DW_OP_lit23: | |
20631 | case DW_OP_lit24: | |
20632 | case DW_OP_lit25: | |
20633 | case DW_OP_lit26: | |
20634 | case DW_OP_lit27: | |
20635 | case DW_OP_lit28: | |
20636 | case DW_OP_lit29: | |
20637 | case DW_OP_lit30: | |
20638 | case DW_OP_lit31: | |
20639 | stack[++stacki] = op - DW_OP_lit0; | |
20640 | break; | |
f1bea926 | 20641 | |
21ae7a4d JK |
20642 | case DW_OP_reg0: |
20643 | case DW_OP_reg1: | |
20644 | case DW_OP_reg2: | |
20645 | case DW_OP_reg3: | |
20646 | case DW_OP_reg4: | |
20647 | case DW_OP_reg5: | |
20648 | case DW_OP_reg6: | |
20649 | case DW_OP_reg7: | |
20650 | case DW_OP_reg8: | |
20651 | case DW_OP_reg9: | |
20652 | case DW_OP_reg10: | |
20653 | case DW_OP_reg11: | |
20654 | case DW_OP_reg12: | |
20655 | case DW_OP_reg13: | |
20656 | case DW_OP_reg14: | |
20657 | case DW_OP_reg15: | |
20658 | case DW_OP_reg16: | |
20659 | case DW_OP_reg17: | |
20660 | case DW_OP_reg18: | |
20661 | case DW_OP_reg19: | |
20662 | case DW_OP_reg20: | |
20663 | case DW_OP_reg21: | |
20664 | case DW_OP_reg22: | |
20665 | case DW_OP_reg23: | |
20666 | case DW_OP_reg24: | |
20667 | case DW_OP_reg25: | |
20668 | case DW_OP_reg26: | |
20669 | case DW_OP_reg27: | |
20670 | case DW_OP_reg28: | |
20671 | case DW_OP_reg29: | |
20672 | case DW_OP_reg30: | |
20673 | case DW_OP_reg31: | |
20674 | stack[++stacki] = op - DW_OP_reg0; | |
20675 | if (i < size) | |
20676 | dwarf2_complex_location_expr_complaint (); | |
20677 | break; | |
c906108c | 20678 | |
21ae7a4d JK |
20679 | case DW_OP_regx: |
20680 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
20681 | i += bytes_read; | |
20682 | stack[++stacki] = unsnd; | |
20683 | if (i < size) | |
20684 | dwarf2_complex_location_expr_complaint (); | |
20685 | break; | |
c906108c | 20686 | |
21ae7a4d JK |
20687 | case DW_OP_addr: |
20688 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
20689 | cu, &bytes_read); | |
20690 | i += bytes_read; | |
20691 | break; | |
d53d4ac5 | 20692 | |
21ae7a4d JK |
20693 | case DW_OP_const1u: |
20694 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
20695 | i += 1; | |
20696 | break; | |
20697 | ||
20698 | case DW_OP_const1s: | |
20699 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
20700 | i += 1; | |
20701 | break; | |
20702 | ||
20703 | case DW_OP_const2u: | |
20704 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
20705 | i += 2; | |
20706 | break; | |
20707 | ||
20708 | case DW_OP_const2s: | |
20709 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
20710 | i += 2; | |
20711 | break; | |
d53d4ac5 | 20712 | |
21ae7a4d JK |
20713 | case DW_OP_const4u: |
20714 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
20715 | i += 4; | |
20716 | break; | |
20717 | ||
20718 | case DW_OP_const4s: | |
20719 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
20720 | i += 4; | |
20721 | break; | |
20722 | ||
585861ea JK |
20723 | case DW_OP_const8u: |
20724 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
20725 | i += 8; | |
20726 | break; | |
20727 | ||
21ae7a4d JK |
20728 | case DW_OP_constu: |
20729 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
20730 | &bytes_read); | |
20731 | i += bytes_read; | |
20732 | break; | |
20733 | ||
20734 | case DW_OP_consts: | |
20735 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
20736 | i += bytes_read; | |
20737 | break; | |
20738 | ||
20739 | case DW_OP_dup: | |
20740 | stack[stacki + 1] = stack[stacki]; | |
20741 | stacki++; | |
20742 | break; | |
20743 | ||
20744 | case DW_OP_plus: | |
20745 | stack[stacki - 1] += stack[stacki]; | |
20746 | stacki--; | |
20747 | break; | |
20748 | ||
20749 | case DW_OP_plus_uconst: | |
20750 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
20751 | &bytes_read); | |
20752 | i += bytes_read; | |
20753 | break; | |
20754 | ||
20755 | case DW_OP_minus: | |
20756 | stack[stacki - 1] -= stack[stacki]; | |
20757 | stacki--; | |
20758 | break; | |
20759 | ||
20760 | case DW_OP_deref: | |
20761 | /* If we're not the last op, then we definitely can't encode | |
20762 | this using GDB's address_class enum. This is valid for partial | |
20763 | global symbols, although the variable's address will be bogus | |
20764 | in the psymtab. */ | |
20765 | if (i < size) | |
20766 | dwarf2_complex_location_expr_complaint (); | |
20767 | break; | |
20768 | ||
20769 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 20770 | case DW_OP_form_tls_address: |
21ae7a4d JK |
20771 | /* The top of the stack has the offset from the beginning |
20772 | of the thread control block at which the variable is located. */ | |
20773 | /* Nothing should follow this operator, so the top of stack would | |
20774 | be returned. */ | |
20775 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
20776 | address will be bogus in the psymtab. Make it always at least |
20777 | non-zero to not look as a variable garbage collected by linker | |
20778 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
20779 | if (i < size) |
20780 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 20781 | stack[stacki]++; |
21ae7a4d JK |
20782 | break; |
20783 | ||
20784 | case DW_OP_GNU_uninit: | |
20785 | break; | |
20786 | ||
3019eac3 | 20787 | case DW_OP_GNU_addr_index: |
49f6c839 | 20788 | case DW_OP_GNU_const_index: |
3019eac3 DE |
20789 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
20790 | &bytes_read); | |
20791 | i += bytes_read; | |
20792 | break; | |
20793 | ||
21ae7a4d JK |
20794 | default: |
20795 | { | |
f39c6ffd | 20796 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
20797 | |
20798 | if (name) | |
20799 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
20800 | name); | |
20801 | else | |
20802 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
20803 | op); | |
20804 | } | |
20805 | ||
20806 | return (stack[stacki]); | |
d53d4ac5 | 20807 | } |
3c6e0cb3 | 20808 | |
21ae7a4d JK |
20809 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
20810 | outside of the allocated space. Also enforce minimum>0. */ | |
20811 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
20812 | { | |
20813 | complaint (&symfile_complaints, | |
20814 | _("location description stack overflow")); | |
20815 | return 0; | |
20816 | } | |
20817 | ||
20818 | if (stacki <= 0) | |
20819 | { | |
20820 | complaint (&symfile_complaints, | |
20821 | _("location description stack underflow")); | |
20822 | return 0; | |
20823 | } | |
20824 | } | |
20825 | return (stack[stacki]); | |
c906108c SS |
20826 | } |
20827 | ||
20828 | /* memory allocation interface */ | |
20829 | ||
c906108c | 20830 | static struct dwarf_block * |
7b5a2f43 | 20831 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 20832 | { |
8d749320 | 20833 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
20834 | } |
20835 | ||
c906108c | 20836 | static struct die_info * |
b60c80d6 | 20837 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
20838 | { |
20839 | struct die_info *die; | |
b60c80d6 DJ |
20840 | size_t size = sizeof (struct die_info); |
20841 | ||
20842 | if (num_attrs > 1) | |
20843 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 20844 | |
b60c80d6 | 20845 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
20846 | memset (die, 0, sizeof (struct die_info)); |
20847 | return (die); | |
20848 | } | |
2e276125 JB |
20849 | |
20850 | \f | |
20851 | /* Macro support. */ | |
20852 | ||
233d95b5 JK |
20853 | /* Return file name relative to the compilation directory of file number I in |
20854 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 20855 | responsible for freeing it. */ |
233d95b5 | 20856 | |
2e276125 | 20857 | static char * |
233d95b5 | 20858 | file_file_name (int file, struct line_header *lh) |
2e276125 | 20859 | { |
6a83a1e6 EZ |
20860 | /* Is the file number a valid index into the line header's file name |
20861 | table? Remember that file numbers start with one, not zero. */ | |
20862 | if (1 <= file && file <= lh->num_file_names) | |
20863 | { | |
20864 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 20865 | |
afa6c9ab SL |
20866 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0 |
20867 | || lh->include_dirs == NULL) | |
6a83a1e6 | 20868 | return xstrdup (fe->name); |
233d95b5 | 20869 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
b36cec19 | 20870 | fe->name, (char *) NULL); |
6a83a1e6 | 20871 | } |
2e276125 JB |
20872 | else |
20873 | { | |
6a83a1e6 EZ |
20874 | /* The compiler produced a bogus file number. We can at least |
20875 | record the macro definitions made in the file, even if we | |
20876 | won't be able to find the file by name. */ | |
20877 | char fake_name[80]; | |
9a619af0 | 20878 | |
8c042590 PM |
20879 | xsnprintf (fake_name, sizeof (fake_name), |
20880 | "<bad macro file number %d>", file); | |
2e276125 | 20881 | |
6e70227d | 20882 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
20883 | _("bad file number in macro information (%d)"), |
20884 | file); | |
2e276125 | 20885 | |
6a83a1e6 | 20886 | return xstrdup (fake_name); |
2e276125 JB |
20887 | } |
20888 | } | |
20889 | ||
233d95b5 JK |
20890 | /* Return the full name of file number I in *LH's file name table. |
20891 | Use COMP_DIR as the name of the current directory of the | |
20892 | compilation. The result is allocated using xmalloc; the caller is | |
20893 | responsible for freeing it. */ | |
20894 | static char * | |
20895 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
20896 | { | |
20897 | /* Is the file number a valid index into the line header's file name | |
20898 | table? Remember that file numbers start with one, not zero. */ | |
20899 | if (1 <= file && file <= lh->num_file_names) | |
20900 | { | |
20901 | char *relative = file_file_name (file, lh); | |
20902 | ||
20903 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
20904 | return relative; | |
b36cec19 PA |
20905 | return reconcat (relative, comp_dir, SLASH_STRING, |
20906 | relative, (char *) NULL); | |
233d95b5 JK |
20907 | } |
20908 | else | |
20909 | return file_file_name (file, lh); | |
20910 | } | |
20911 | ||
2e276125 JB |
20912 | |
20913 | static struct macro_source_file * | |
20914 | macro_start_file (int file, int line, | |
20915 | struct macro_source_file *current_file, | |
43f3e411 | 20916 | struct line_header *lh) |
2e276125 | 20917 | { |
233d95b5 JK |
20918 | /* File name relative to the compilation directory of this source file. */ |
20919 | char *file_name = file_file_name (file, lh); | |
2e276125 | 20920 | |
2e276125 | 20921 | if (! current_file) |
abc9d0dc | 20922 | { |
fc474241 DE |
20923 | /* Note: We don't create a macro table for this compilation unit |
20924 | at all until we actually get a filename. */ | |
43f3e411 | 20925 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 20926 | |
abc9d0dc TT |
20927 | /* If we have no current file, then this must be the start_file |
20928 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
20929 | current_file = macro_set_main (macro_table, file_name); |
20930 | macro_define_special (macro_table); | |
abc9d0dc | 20931 | } |
2e276125 | 20932 | else |
233d95b5 | 20933 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 20934 | |
233d95b5 | 20935 | xfree (file_name); |
6e70227d | 20936 | |
2e276125 JB |
20937 | return current_file; |
20938 | } | |
20939 | ||
20940 | ||
20941 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
20942 | followed by a null byte. */ | |
20943 | static char * | |
20944 | copy_string (const char *buf, int len) | |
20945 | { | |
224c3ddb | 20946 | char *s = (char *) xmalloc (len + 1); |
9a619af0 | 20947 | |
2e276125 JB |
20948 | memcpy (s, buf, len); |
20949 | s[len] = '\0'; | |
2e276125 JB |
20950 | return s; |
20951 | } | |
20952 | ||
20953 | ||
20954 | static const char * | |
20955 | consume_improper_spaces (const char *p, const char *body) | |
20956 | { | |
20957 | if (*p == ' ') | |
20958 | { | |
4d3c2250 | 20959 | complaint (&symfile_complaints, |
3e43a32a MS |
20960 | _("macro definition contains spaces " |
20961 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 20962 | body); |
2e276125 JB |
20963 | |
20964 | while (*p == ' ') | |
20965 | p++; | |
20966 | } | |
20967 | ||
20968 | return p; | |
20969 | } | |
20970 | ||
20971 | ||
20972 | static void | |
20973 | parse_macro_definition (struct macro_source_file *file, int line, | |
20974 | const char *body) | |
20975 | { | |
20976 | const char *p; | |
20977 | ||
20978 | /* The body string takes one of two forms. For object-like macro | |
20979 | definitions, it should be: | |
20980 | ||
20981 | <macro name> " " <definition> | |
20982 | ||
20983 | For function-like macro definitions, it should be: | |
20984 | ||
20985 | <macro name> "() " <definition> | |
20986 | or | |
20987 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
20988 | ||
20989 | Spaces may appear only where explicitly indicated, and in the | |
20990 | <definition>. | |
20991 | ||
20992 | The Dwarf 2 spec says that an object-like macro's name is always | |
20993 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 20994 | the space when the macro's definition is the empty string. |
2e276125 JB |
20995 | |
20996 | The Dwarf 2 spec says that there should be no spaces between the | |
20997 | formal arguments in a function-like macro's formal argument list, | |
20998 | but versions of GCC around March 2002 include spaces after the | |
20999 | commas. */ | |
21000 | ||
21001 | ||
21002 | /* Find the extent of the macro name. The macro name is terminated | |
21003 | by either a space or null character (for an object-like macro) or | |
21004 | an opening paren (for a function-like macro). */ | |
21005 | for (p = body; *p; p++) | |
21006 | if (*p == ' ' || *p == '(') | |
21007 | break; | |
21008 | ||
21009 | if (*p == ' ' || *p == '\0') | |
21010 | { | |
21011 | /* It's an object-like macro. */ | |
21012 | int name_len = p - body; | |
21013 | char *name = copy_string (body, name_len); | |
21014 | const char *replacement; | |
21015 | ||
21016 | if (*p == ' ') | |
21017 | replacement = body + name_len + 1; | |
21018 | else | |
21019 | { | |
4d3c2250 | 21020 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21021 | replacement = body + name_len; |
21022 | } | |
6e70227d | 21023 | |
2e276125 JB |
21024 | macro_define_object (file, line, name, replacement); |
21025 | ||
21026 | xfree (name); | |
21027 | } | |
21028 | else if (*p == '(') | |
21029 | { | |
21030 | /* It's a function-like macro. */ | |
21031 | char *name = copy_string (body, p - body); | |
21032 | int argc = 0; | |
21033 | int argv_size = 1; | |
8d749320 | 21034 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
21035 | |
21036 | p++; | |
21037 | ||
21038 | p = consume_improper_spaces (p, body); | |
21039 | ||
21040 | /* Parse the formal argument list. */ | |
21041 | while (*p && *p != ')') | |
21042 | { | |
21043 | /* Find the extent of the current argument name. */ | |
21044 | const char *arg_start = p; | |
21045 | ||
21046 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
21047 | p++; | |
21048 | ||
21049 | if (! *p || p == arg_start) | |
4d3c2250 | 21050 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21051 | else |
21052 | { | |
21053 | /* Make sure argv has room for the new argument. */ | |
21054 | if (argc >= argv_size) | |
21055 | { | |
21056 | argv_size *= 2; | |
224c3ddb | 21057 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
21058 | } |
21059 | ||
21060 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
21061 | } | |
21062 | ||
21063 | p = consume_improper_spaces (p, body); | |
21064 | ||
21065 | /* Consume the comma, if present. */ | |
21066 | if (*p == ',') | |
21067 | { | |
21068 | p++; | |
21069 | ||
21070 | p = consume_improper_spaces (p, body); | |
21071 | } | |
21072 | } | |
21073 | ||
21074 | if (*p == ')') | |
21075 | { | |
21076 | p++; | |
21077 | ||
21078 | if (*p == ' ') | |
21079 | /* Perfectly formed definition, no complaints. */ | |
21080 | macro_define_function (file, line, name, | |
6e70227d | 21081 | argc, (const char **) argv, |
2e276125 JB |
21082 | p + 1); |
21083 | else if (*p == '\0') | |
21084 | { | |
21085 | /* Complain, but do define it. */ | |
4d3c2250 | 21086 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 21087 | macro_define_function (file, line, name, |
6e70227d | 21088 | argc, (const char **) argv, |
2e276125 JB |
21089 | p); |
21090 | } | |
21091 | else | |
21092 | /* Just complain. */ | |
4d3c2250 | 21093 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21094 | } |
21095 | else | |
21096 | /* Just complain. */ | |
4d3c2250 | 21097 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21098 | |
21099 | xfree (name); | |
21100 | { | |
21101 | int i; | |
21102 | ||
21103 | for (i = 0; i < argc; i++) | |
21104 | xfree (argv[i]); | |
21105 | } | |
21106 | xfree (argv); | |
21107 | } | |
21108 | else | |
4d3c2250 | 21109 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21110 | } |
21111 | ||
cf2c3c16 TT |
21112 | /* Skip some bytes from BYTES according to the form given in FORM. |
21113 | Returns the new pointer. */ | |
2e276125 | 21114 | |
d521ce57 TT |
21115 | static const gdb_byte * |
21116 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
21117 | enum dwarf_form form, |
21118 | unsigned int offset_size, | |
21119 | struct dwarf2_section_info *section) | |
2e276125 | 21120 | { |
cf2c3c16 | 21121 | unsigned int bytes_read; |
2e276125 | 21122 | |
cf2c3c16 | 21123 | switch (form) |
2e276125 | 21124 | { |
cf2c3c16 TT |
21125 | case DW_FORM_data1: |
21126 | case DW_FORM_flag: | |
21127 | ++bytes; | |
21128 | break; | |
21129 | ||
21130 | case DW_FORM_data2: | |
21131 | bytes += 2; | |
21132 | break; | |
21133 | ||
21134 | case DW_FORM_data4: | |
21135 | bytes += 4; | |
21136 | break; | |
21137 | ||
21138 | case DW_FORM_data8: | |
21139 | bytes += 8; | |
21140 | break; | |
21141 | ||
21142 | case DW_FORM_string: | |
21143 | read_direct_string (abfd, bytes, &bytes_read); | |
21144 | bytes += bytes_read; | |
21145 | break; | |
21146 | ||
21147 | case DW_FORM_sec_offset: | |
21148 | case DW_FORM_strp: | |
36586728 | 21149 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
21150 | bytes += offset_size; |
21151 | break; | |
21152 | ||
21153 | case DW_FORM_block: | |
21154 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
21155 | bytes += bytes_read; | |
21156 | break; | |
21157 | ||
21158 | case DW_FORM_block1: | |
21159 | bytes += 1 + read_1_byte (abfd, bytes); | |
21160 | break; | |
21161 | case DW_FORM_block2: | |
21162 | bytes += 2 + read_2_bytes (abfd, bytes); | |
21163 | break; | |
21164 | case DW_FORM_block4: | |
21165 | bytes += 4 + read_4_bytes (abfd, bytes); | |
21166 | break; | |
21167 | ||
21168 | case DW_FORM_sdata: | |
21169 | case DW_FORM_udata: | |
3019eac3 DE |
21170 | case DW_FORM_GNU_addr_index: |
21171 | case DW_FORM_GNU_str_index: | |
d521ce57 | 21172 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
21173 | if (bytes == NULL) |
21174 | { | |
21175 | dwarf2_section_buffer_overflow_complaint (section); | |
21176 | return NULL; | |
21177 | } | |
cf2c3c16 TT |
21178 | break; |
21179 | ||
21180 | default: | |
21181 | { | |
21182 | complain: | |
21183 | complaint (&symfile_complaints, | |
21184 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 21185 | form, get_section_name (section)); |
cf2c3c16 TT |
21186 | return NULL; |
21187 | } | |
2e276125 JB |
21188 | } |
21189 | ||
cf2c3c16 TT |
21190 | return bytes; |
21191 | } | |
757a13d0 | 21192 | |
cf2c3c16 TT |
21193 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
21194 | opcode. Returns an updated pointer to the macro data buffer; or, | |
21195 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 21196 | |
d521ce57 | 21197 | static const gdb_byte * |
cf2c3c16 | 21198 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
21199 | const gdb_byte **opcode_definitions, |
21200 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
21201 | bfd *abfd, |
21202 | unsigned int offset_size, | |
21203 | struct dwarf2_section_info *section) | |
21204 | { | |
21205 | unsigned int bytes_read, i; | |
21206 | unsigned long arg; | |
d521ce57 | 21207 | const gdb_byte *defn; |
2e276125 | 21208 | |
cf2c3c16 | 21209 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 21210 | { |
cf2c3c16 TT |
21211 | complaint (&symfile_complaints, |
21212 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
21213 | opcode); | |
21214 | return NULL; | |
21215 | } | |
2e276125 | 21216 | |
cf2c3c16 TT |
21217 | defn = opcode_definitions[opcode]; |
21218 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
21219 | defn += bytes_read; | |
2e276125 | 21220 | |
cf2c3c16 TT |
21221 | for (i = 0; i < arg; ++i) |
21222 | { | |
aead7601 SM |
21223 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
21224 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 21225 | section); |
cf2c3c16 TT |
21226 | if (mac_ptr == NULL) |
21227 | { | |
21228 | /* skip_form_bytes already issued the complaint. */ | |
21229 | return NULL; | |
21230 | } | |
21231 | } | |
757a13d0 | 21232 | |
cf2c3c16 TT |
21233 | return mac_ptr; |
21234 | } | |
757a13d0 | 21235 | |
cf2c3c16 TT |
21236 | /* A helper function which parses the header of a macro section. |
21237 | If the macro section is the extended (for now called "GNU") type, | |
21238 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
21239 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 21240 | |
d521ce57 TT |
21241 | static const gdb_byte * |
21242 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 21243 | bfd *abfd, |
d521ce57 | 21244 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
21245 | unsigned int *offset_size, |
21246 | int section_is_gnu) | |
21247 | { | |
21248 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 21249 | |
cf2c3c16 TT |
21250 | if (section_is_gnu) |
21251 | { | |
21252 | unsigned int version, flags; | |
757a13d0 | 21253 | |
cf2c3c16 TT |
21254 | version = read_2_bytes (abfd, mac_ptr); |
21255 | if (version != 4) | |
21256 | { | |
21257 | complaint (&symfile_complaints, | |
21258 | _("unrecognized version `%d' in .debug_macro section"), | |
21259 | version); | |
21260 | return NULL; | |
21261 | } | |
21262 | mac_ptr += 2; | |
757a13d0 | 21263 | |
cf2c3c16 TT |
21264 | flags = read_1_byte (abfd, mac_ptr); |
21265 | ++mac_ptr; | |
21266 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 21267 | |
cf2c3c16 TT |
21268 | if ((flags & 2) != 0) |
21269 | /* We don't need the line table offset. */ | |
21270 | mac_ptr += *offset_size; | |
757a13d0 | 21271 | |
cf2c3c16 TT |
21272 | /* Vendor opcode descriptions. */ |
21273 | if ((flags & 4) != 0) | |
21274 | { | |
21275 | unsigned int i, count; | |
757a13d0 | 21276 | |
cf2c3c16 TT |
21277 | count = read_1_byte (abfd, mac_ptr); |
21278 | ++mac_ptr; | |
21279 | for (i = 0; i < count; ++i) | |
21280 | { | |
21281 | unsigned int opcode, bytes_read; | |
21282 | unsigned long arg; | |
21283 | ||
21284 | opcode = read_1_byte (abfd, mac_ptr); | |
21285 | ++mac_ptr; | |
21286 | opcode_definitions[opcode] = mac_ptr; | |
21287 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21288 | mac_ptr += bytes_read; | |
21289 | mac_ptr += arg; | |
21290 | } | |
757a13d0 | 21291 | } |
cf2c3c16 | 21292 | } |
757a13d0 | 21293 | |
cf2c3c16 TT |
21294 | return mac_ptr; |
21295 | } | |
757a13d0 | 21296 | |
cf2c3c16 | 21297 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 21298 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
21299 | |
21300 | static void | |
d521ce57 TT |
21301 | dwarf_decode_macro_bytes (bfd *abfd, |
21302 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 21303 | struct macro_source_file *current_file, |
43f3e411 | 21304 | struct line_header *lh, |
cf2c3c16 | 21305 | struct dwarf2_section_info *section, |
36586728 | 21306 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 21307 | unsigned int offset_size, |
8fc3fc34 | 21308 | htab_t include_hash) |
cf2c3c16 | 21309 | { |
4d663531 | 21310 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
21311 | enum dwarf_macro_record_type macinfo_type; |
21312 | int at_commandline; | |
d521ce57 | 21313 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 21314 | |
cf2c3c16 TT |
21315 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
21316 | &offset_size, section_is_gnu); | |
21317 | if (mac_ptr == NULL) | |
21318 | { | |
21319 | /* We already issued a complaint. */ | |
21320 | return; | |
21321 | } | |
757a13d0 JK |
21322 | |
21323 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
21324 | GDB is still reading the definitions from command line. First | |
21325 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
21326 | to create CURRENT_FILE for the main source holding also the command line | |
21327 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
21328 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
21329 | ||
21330 | at_commandline = 1; | |
21331 | ||
21332 | do | |
21333 | { | |
21334 | /* Do we at least have room for a macinfo type byte? */ | |
21335 | if (mac_ptr >= mac_end) | |
21336 | { | |
f664829e | 21337 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
21338 | break; |
21339 | } | |
21340 | ||
aead7601 | 21341 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
21342 | mac_ptr++; |
21343 | ||
cf2c3c16 TT |
21344 | /* Note that we rely on the fact that the corresponding GNU and |
21345 | DWARF constants are the same. */ | |
757a13d0 JK |
21346 | switch (macinfo_type) |
21347 | { | |
21348 | /* A zero macinfo type indicates the end of the macro | |
21349 | information. */ | |
21350 | case 0: | |
21351 | break; | |
2e276125 | 21352 | |
cf2c3c16 TT |
21353 | case DW_MACRO_GNU_define: |
21354 | case DW_MACRO_GNU_undef: | |
21355 | case DW_MACRO_GNU_define_indirect: | |
21356 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
21357 | case DW_MACRO_GNU_define_indirect_alt: |
21358 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 21359 | { |
891d2f0b | 21360 | unsigned int bytes_read; |
2e276125 | 21361 | int line; |
d521ce57 | 21362 | const char *body; |
cf2c3c16 | 21363 | int is_define; |
2e276125 | 21364 | |
cf2c3c16 TT |
21365 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
21366 | mac_ptr += bytes_read; | |
21367 | ||
21368 | if (macinfo_type == DW_MACRO_GNU_define | |
21369 | || macinfo_type == DW_MACRO_GNU_undef) | |
21370 | { | |
21371 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
21372 | mac_ptr += bytes_read; | |
21373 | } | |
21374 | else | |
21375 | { | |
21376 | LONGEST str_offset; | |
21377 | ||
21378 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
21379 | mac_ptr += offset_size; | |
2e276125 | 21380 | |
36586728 | 21381 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
21382 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
21383 | || section_is_dwz) | |
36586728 TT |
21384 | { |
21385 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
21386 | ||
21387 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
21388 | } | |
21389 | else | |
21390 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
21391 | } |
21392 | ||
21393 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
21394 | || macinfo_type == DW_MACRO_GNU_define_indirect |
21395 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 21396 | if (! current_file) |
757a13d0 JK |
21397 | { |
21398 | /* DWARF violation as no main source is present. */ | |
21399 | complaint (&symfile_complaints, | |
21400 | _("debug info with no main source gives macro %s " | |
21401 | "on line %d: %s"), | |
cf2c3c16 TT |
21402 | is_define ? _("definition") : _("undefinition"), |
21403 | line, body); | |
757a13d0 JK |
21404 | break; |
21405 | } | |
3e43a32a MS |
21406 | if ((line == 0 && !at_commandline) |
21407 | || (line != 0 && at_commandline)) | |
4d3c2250 | 21408 | complaint (&symfile_complaints, |
757a13d0 JK |
21409 | _("debug info gives %s macro %s with %s line %d: %s"), |
21410 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 21411 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
21412 | line == 0 ? _("zero") : _("non-zero"), line, body); |
21413 | ||
cf2c3c16 | 21414 | if (is_define) |
757a13d0 | 21415 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
21416 | else |
21417 | { | |
21418 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
21419 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
21420 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
21421 | macro_undef (current_file, line, body); |
21422 | } | |
2e276125 JB |
21423 | } |
21424 | break; | |
21425 | ||
cf2c3c16 | 21426 | case DW_MACRO_GNU_start_file: |
2e276125 | 21427 | { |
891d2f0b | 21428 | unsigned int bytes_read; |
2e276125 JB |
21429 | int line, file; |
21430 | ||
21431 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21432 | mac_ptr += bytes_read; | |
21433 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21434 | mac_ptr += bytes_read; | |
21435 | ||
3e43a32a MS |
21436 | if ((line == 0 && !at_commandline) |
21437 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
21438 | complaint (&symfile_complaints, |
21439 | _("debug info gives source %d included " | |
21440 | "from %s at %s line %d"), | |
21441 | file, at_commandline ? _("command-line") : _("file"), | |
21442 | line == 0 ? _("zero") : _("non-zero"), line); | |
21443 | ||
21444 | if (at_commandline) | |
21445 | { | |
cf2c3c16 TT |
21446 | /* This DW_MACRO_GNU_start_file was executed in the |
21447 | pass one. */ | |
757a13d0 JK |
21448 | at_commandline = 0; |
21449 | } | |
21450 | else | |
43f3e411 | 21451 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
21452 | } |
21453 | break; | |
21454 | ||
cf2c3c16 | 21455 | case DW_MACRO_GNU_end_file: |
2e276125 | 21456 | if (! current_file) |
4d3c2250 | 21457 | complaint (&symfile_complaints, |
3e43a32a MS |
21458 | _("macro debug info has an unmatched " |
21459 | "`close_file' directive")); | |
2e276125 JB |
21460 | else |
21461 | { | |
21462 | current_file = current_file->included_by; | |
21463 | if (! current_file) | |
21464 | { | |
cf2c3c16 | 21465 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
21466 | |
21467 | /* GCC circa March 2002 doesn't produce the zero | |
21468 | type byte marking the end of the compilation | |
21469 | unit. Complain if it's not there, but exit no | |
21470 | matter what. */ | |
21471 | ||
21472 | /* Do we at least have room for a macinfo type byte? */ | |
21473 | if (mac_ptr >= mac_end) | |
21474 | { | |
f664829e | 21475 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
21476 | return; |
21477 | } | |
21478 | ||
21479 | /* We don't increment mac_ptr here, so this is just | |
21480 | a look-ahead. */ | |
aead7601 SM |
21481 | next_type |
21482 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
21483 | mac_ptr); | |
2e276125 | 21484 | if (next_type != 0) |
4d3c2250 | 21485 | complaint (&symfile_complaints, |
3e43a32a MS |
21486 | _("no terminating 0-type entry for " |
21487 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
21488 | |
21489 | return; | |
21490 | } | |
21491 | } | |
21492 | break; | |
21493 | ||
cf2c3c16 | 21494 | case DW_MACRO_GNU_transparent_include: |
36586728 | 21495 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21496 | { |
21497 | LONGEST offset; | |
8fc3fc34 | 21498 | void **slot; |
a036ba48 TT |
21499 | bfd *include_bfd = abfd; |
21500 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 21501 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 21502 | int is_dwz = section_is_dwz; |
d521ce57 | 21503 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
21504 | |
21505 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
21506 | mac_ptr += offset_size; | |
21507 | ||
a036ba48 TT |
21508 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
21509 | { | |
21510 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
21511 | ||
4d663531 | 21512 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 21513 | |
a036ba48 | 21514 | include_section = &dwz->macro; |
a32a8923 | 21515 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
21516 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
21517 | is_dwz = 1; | |
21518 | } | |
21519 | ||
21520 | new_mac_ptr = include_section->buffer + offset; | |
21521 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
21522 | ||
8fc3fc34 TT |
21523 | if (*slot != NULL) |
21524 | { | |
21525 | /* This has actually happened; see | |
21526 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
21527 | complaint (&symfile_complaints, | |
21528 | _("recursive DW_MACRO_GNU_transparent_include in " | |
21529 | ".debug_macro section")); | |
21530 | } | |
21531 | else | |
21532 | { | |
d521ce57 | 21533 | *slot = (void *) new_mac_ptr; |
36586728 | 21534 | |
a036ba48 | 21535 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 21536 | include_mac_end, current_file, lh, |
36586728 | 21537 | section, section_is_gnu, is_dwz, |
4d663531 | 21538 | offset_size, include_hash); |
8fc3fc34 | 21539 | |
d521ce57 | 21540 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 21541 | } |
cf2c3c16 TT |
21542 | } |
21543 | break; | |
21544 | ||
2e276125 | 21545 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
21546 | if (!section_is_gnu) |
21547 | { | |
21548 | unsigned int bytes_read; | |
2e276125 | 21549 | |
ac298888 TT |
21550 | /* This reads the constant, but since we don't recognize |
21551 | any vendor extensions, we ignore it. */ | |
21552 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
21553 | mac_ptr += bytes_read; |
21554 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21555 | mac_ptr += bytes_read; | |
2e276125 | 21556 | |
cf2c3c16 TT |
21557 | /* We don't recognize any vendor extensions. */ |
21558 | break; | |
21559 | } | |
21560 | /* FALLTHROUGH */ | |
21561 | ||
21562 | default: | |
21563 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21564 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21565 | section); |
21566 | if (mac_ptr == NULL) | |
21567 | return; | |
21568 | break; | |
2e276125 | 21569 | } |
757a13d0 | 21570 | } while (macinfo_type != 0); |
2e276125 | 21571 | } |
8e19ed76 | 21572 | |
cf2c3c16 | 21573 | static void |
09262596 | 21574 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 21575 | int section_is_gnu) |
cf2c3c16 | 21576 | { |
bb5ed363 | 21577 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
21578 | struct line_header *lh = cu->line_header; |
21579 | bfd *abfd; | |
d521ce57 | 21580 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
21581 | struct macro_source_file *current_file = 0; |
21582 | enum dwarf_macro_record_type macinfo_type; | |
21583 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 21584 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
21585 | struct cleanup *cleanup; |
21586 | htab_t include_hash; | |
21587 | void **slot; | |
09262596 DE |
21588 | struct dwarf2_section_info *section; |
21589 | const char *section_name; | |
21590 | ||
21591 | if (cu->dwo_unit != NULL) | |
21592 | { | |
21593 | if (section_is_gnu) | |
21594 | { | |
21595 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
21596 | section_name = ".debug_macro.dwo"; | |
21597 | } | |
21598 | else | |
21599 | { | |
21600 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
21601 | section_name = ".debug_macinfo.dwo"; | |
21602 | } | |
21603 | } | |
21604 | else | |
21605 | { | |
21606 | if (section_is_gnu) | |
21607 | { | |
21608 | section = &dwarf2_per_objfile->macro; | |
21609 | section_name = ".debug_macro"; | |
21610 | } | |
21611 | else | |
21612 | { | |
21613 | section = &dwarf2_per_objfile->macinfo; | |
21614 | section_name = ".debug_macinfo"; | |
21615 | } | |
21616 | } | |
cf2c3c16 | 21617 | |
bb5ed363 | 21618 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
21619 | if (section->buffer == NULL) |
21620 | { | |
fceca515 | 21621 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
21622 | return; |
21623 | } | |
a32a8923 | 21624 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
21625 | |
21626 | /* First pass: Find the name of the base filename. | |
21627 | This filename is needed in order to process all macros whose definition | |
21628 | (or undefinition) comes from the command line. These macros are defined | |
21629 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
21630 | associated to the base file. | |
21631 | ||
21632 | To determine the base file name, we scan the macro definitions until we | |
21633 | reach the first DW_MACINFO_start_file entry. We then initialize | |
21634 | CURRENT_FILE accordingly so that any macro definition found before the | |
21635 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
21636 | ||
21637 | mac_ptr = section->buffer + offset; | |
21638 | mac_end = section->buffer + section->size; | |
21639 | ||
21640 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
21641 | &offset_size, section_is_gnu); | |
21642 | if (mac_ptr == NULL) | |
21643 | { | |
21644 | /* We already issued a complaint. */ | |
21645 | return; | |
21646 | } | |
21647 | ||
21648 | do | |
21649 | { | |
21650 | /* Do we at least have room for a macinfo type byte? */ | |
21651 | if (mac_ptr >= mac_end) | |
21652 | { | |
21653 | /* Complaint is printed during the second pass as GDB will probably | |
21654 | stop the first pass earlier upon finding | |
21655 | DW_MACINFO_start_file. */ | |
21656 | break; | |
21657 | } | |
21658 | ||
aead7601 | 21659 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
21660 | mac_ptr++; |
21661 | ||
21662 | /* Note that we rely on the fact that the corresponding GNU and | |
21663 | DWARF constants are the same. */ | |
21664 | switch (macinfo_type) | |
21665 | { | |
21666 | /* A zero macinfo type indicates the end of the macro | |
21667 | information. */ | |
21668 | case 0: | |
21669 | break; | |
21670 | ||
21671 | case DW_MACRO_GNU_define: | |
21672 | case DW_MACRO_GNU_undef: | |
21673 | /* Only skip the data by MAC_PTR. */ | |
21674 | { | |
21675 | unsigned int bytes_read; | |
21676 | ||
21677 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21678 | mac_ptr += bytes_read; | |
21679 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21680 | mac_ptr += bytes_read; | |
21681 | } | |
21682 | break; | |
21683 | ||
21684 | case DW_MACRO_GNU_start_file: | |
21685 | { | |
21686 | unsigned int bytes_read; | |
21687 | int line, file; | |
21688 | ||
21689 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21690 | mac_ptr += bytes_read; | |
21691 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21692 | mac_ptr += bytes_read; | |
21693 | ||
43f3e411 | 21694 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
21695 | } |
21696 | break; | |
21697 | ||
21698 | case DW_MACRO_GNU_end_file: | |
21699 | /* No data to skip by MAC_PTR. */ | |
21700 | break; | |
21701 | ||
21702 | case DW_MACRO_GNU_define_indirect: | |
21703 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
21704 | case DW_MACRO_GNU_define_indirect_alt: |
21705 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
21706 | { |
21707 | unsigned int bytes_read; | |
21708 | ||
21709 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21710 | mac_ptr += bytes_read; | |
21711 | mac_ptr += offset_size; | |
21712 | } | |
21713 | break; | |
21714 | ||
21715 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 21716 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21717 | /* Note that, according to the spec, a transparent include |
21718 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
21719 | skip this opcode. */ | |
21720 | mac_ptr += offset_size; | |
21721 | break; | |
21722 | ||
21723 | case DW_MACINFO_vendor_ext: | |
21724 | /* Only skip the data by MAC_PTR. */ | |
21725 | if (!section_is_gnu) | |
21726 | { | |
21727 | unsigned int bytes_read; | |
21728 | ||
21729 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21730 | mac_ptr += bytes_read; | |
21731 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21732 | mac_ptr += bytes_read; | |
21733 | } | |
21734 | /* FALLTHROUGH */ | |
21735 | ||
21736 | default: | |
21737 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21738 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21739 | section); |
21740 | if (mac_ptr == NULL) | |
21741 | return; | |
21742 | break; | |
21743 | } | |
21744 | } while (macinfo_type != 0 && current_file == NULL); | |
21745 | ||
21746 | /* Second pass: Process all entries. | |
21747 | ||
21748 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
21749 | command-line macro definitions/undefinitions. This flag is unset when we | |
21750 | reach the first DW_MACINFO_start_file entry. */ | |
21751 | ||
8fc3fc34 TT |
21752 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
21753 | NULL, xcalloc, xfree); | |
21754 | cleanup = make_cleanup_htab_delete (include_hash); | |
21755 | mac_ptr = section->buffer + offset; | |
21756 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 21757 | *slot = (void *) mac_ptr; |
8fc3fc34 | 21758 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 21759 | current_file, lh, section, |
4d663531 | 21760 | section_is_gnu, 0, offset_size, include_hash); |
8fc3fc34 | 21761 | do_cleanups (cleanup); |
cf2c3c16 TT |
21762 | } |
21763 | ||
8e19ed76 | 21764 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 21765 | if so return true else false. */ |
380bca97 | 21766 | |
8e19ed76 | 21767 | static int |
6e5a29e1 | 21768 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
21769 | { |
21770 | return (attr == NULL ? 0 : | |
21771 | attr->form == DW_FORM_block1 | |
21772 | || attr->form == DW_FORM_block2 | |
21773 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
21774 | || attr->form == DW_FORM_block |
21775 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 21776 | } |
4c2df51b | 21777 | |
c6a0999f JB |
21778 | /* Return non-zero if ATTR's value is a section offset --- classes |
21779 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
21780 | You may use DW_UNSND (attr) to retrieve such offsets. | |
21781 | ||
21782 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
21783 | may have a value that belongs to more than one of these classes; it | |
21784 | would be ambiguous if we did, because we use the same forms for all | |
21785 | of them. */ | |
380bca97 | 21786 | |
3690dd37 | 21787 | static int |
6e5a29e1 | 21788 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
21789 | { |
21790 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
21791 | || attr->form == DW_FORM_data8 |
21792 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
21793 | } |
21794 | ||
3690dd37 JB |
21795 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
21796 | zero otherwise. When this function returns true, you can apply | |
21797 | dwarf2_get_attr_constant_value to it. | |
21798 | ||
21799 | However, note that for some attributes you must check | |
21800 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
21801 | and DW_FORM_data8 are members of both the constant class, and of | |
21802 | the classes that contain offsets into other debug sections | |
21803 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
21804 | that, if an attribute's can be either a constant or one of the | |
21805 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
21806 | taken as section offsets, not constants. */ | |
380bca97 | 21807 | |
3690dd37 | 21808 | static int |
6e5a29e1 | 21809 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
21810 | { |
21811 | switch (attr->form) | |
21812 | { | |
21813 | case DW_FORM_sdata: | |
21814 | case DW_FORM_udata: | |
21815 | case DW_FORM_data1: | |
21816 | case DW_FORM_data2: | |
21817 | case DW_FORM_data4: | |
21818 | case DW_FORM_data8: | |
21819 | return 1; | |
21820 | default: | |
21821 | return 0; | |
21822 | } | |
21823 | } | |
21824 | ||
7771576e SA |
21825 | |
21826 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
21827 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
21828 | ||
21829 | static int | |
6e5a29e1 | 21830 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
21831 | { |
21832 | switch (attr->form) | |
21833 | { | |
21834 | case DW_FORM_ref_addr: | |
21835 | case DW_FORM_ref1: | |
21836 | case DW_FORM_ref2: | |
21837 | case DW_FORM_ref4: | |
21838 | case DW_FORM_ref8: | |
21839 | case DW_FORM_ref_udata: | |
21840 | case DW_FORM_GNU_ref_alt: | |
21841 | return 1; | |
21842 | default: | |
21843 | return 0; | |
21844 | } | |
21845 | } | |
21846 | ||
3019eac3 DE |
21847 | /* Return the .debug_loc section to use for CU. |
21848 | For DWO files use .debug_loc.dwo. */ | |
21849 | ||
21850 | static struct dwarf2_section_info * | |
21851 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
21852 | { | |
21853 | if (cu->dwo_unit) | |
21854 | return &cu->dwo_unit->dwo_file->sections.loc; | |
21855 | return &dwarf2_per_objfile->loc; | |
21856 | } | |
21857 | ||
8cf6f0b1 TT |
21858 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
21859 | ||
21860 | static void | |
21861 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
21862 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 21863 | const struct attribute *attr) |
8cf6f0b1 | 21864 | { |
3019eac3 DE |
21865 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
21866 | ||
21867 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
21868 | |
21869 | baton->per_cu = cu->per_cu; | |
21870 | gdb_assert (baton->per_cu); | |
21871 | /* We don't know how long the location list is, but make sure we | |
21872 | don't run off the edge of the section. */ | |
3019eac3 DE |
21873 | baton->size = section->size - DW_UNSND (attr); |
21874 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 21875 | baton->base_address = cu->base_address; |
f664829e | 21876 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
21877 | } |
21878 | ||
4c2df51b | 21879 | static void |
ff39bb5e | 21880 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 21881 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 21882 | { |
bb5ed363 | 21883 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 21884 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 21885 | |
3690dd37 | 21886 | if (attr_form_is_section_offset (attr) |
3019eac3 | 21887 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
21888 | the section. If so, fall through to the complaint in the |
21889 | other branch. */ | |
3019eac3 | 21890 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 21891 | { |
0d53c4c4 | 21892 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 21893 | |
8d749320 | 21894 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 21895 | |
8cf6f0b1 | 21896 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 21897 | |
d00adf39 | 21898 | if (cu->base_known == 0) |
0d53c4c4 | 21899 | complaint (&symfile_complaints, |
3e43a32a MS |
21900 | _("Location list used without " |
21901 | "specifying the CU base address.")); | |
4c2df51b | 21902 | |
f1e6e072 TT |
21903 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21904 | ? dwarf2_loclist_block_index | |
21905 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
21906 | SYMBOL_LOCATION_BATON (sym) = baton; |
21907 | } | |
21908 | else | |
21909 | { | |
21910 | struct dwarf2_locexpr_baton *baton; | |
21911 | ||
8d749320 | 21912 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
21913 | baton->per_cu = cu->per_cu; |
21914 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
21915 | |
21916 | if (attr_form_is_block (attr)) | |
21917 | { | |
21918 | /* Note that we're just copying the block's data pointer | |
21919 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
21920 | info_buffer for SYM's objfile; right now we never release |
21921 | that buffer, but when we do clean up properly this may | |
21922 | need to change. */ | |
0d53c4c4 DJ |
21923 | baton->size = DW_BLOCK (attr)->size; |
21924 | baton->data = DW_BLOCK (attr)->data; | |
21925 | } | |
21926 | else | |
21927 | { | |
21928 | dwarf2_invalid_attrib_class_complaint ("location description", | |
21929 | SYMBOL_NATURAL_NAME (sym)); | |
21930 | baton->size = 0; | |
0d53c4c4 | 21931 | } |
6e70227d | 21932 | |
f1e6e072 TT |
21933 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21934 | ? dwarf2_locexpr_block_index | |
21935 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
21936 | SYMBOL_LOCATION_BATON (sym) = baton; |
21937 | } | |
4c2df51b | 21938 | } |
6502dd73 | 21939 | |
9aa1f1e3 TT |
21940 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
21941 | came from a separate debuginfo file, then the master objfile is | |
21942 | returned. */ | |
ae0d2f24 UW |
21943 | |
21944 | struct objfile * | |
21945 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
21946 | { | |
9291a0cd | 21947 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
21948 | |
21949 | /* Return the master objfile, so that we can report and look up the | |
21950 | correct file containing this variable. */ | |
21951 | if (objfile->separate_debug_objfile_backlink) | |
21952 | objfile = objfile->separate_debug_objfile_backlink; | |
21953 | ||
21954 | return objfile; | |
21955 | } | |
21956 | ||
96408a79 SA |
21957 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
21958 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
21959 | CU_HEADERP first. */ | |
21960 | ||
21961 | static const struct comp_unit_head * | |
21962 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
21963 | struct dwarf2_per_cu_data *per_cu) | |
21964 | { | |
d521ce57 | 21965 | const gdb_byte *info_ptr; |
96408a79 SA |
21966 | |
21967 | if (per_cu->cu) | |
21968 | return &per_cu->cu->header; | |
21969 | ||
8a0459fd | 21970 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
21971 | |
21972 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 21973 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
21974 | |
21975 | return cu_headerp; | |
21976 | } | |
21977 | ||
ae0d2f24 UW |
21978 | /* Return the address size given in the compilation unit header for CU. */ |
21979 | ||
98714339 | 21980 | int |
ae0d2f24 UW |
21981 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
21982 | { | |
96408a79 SA |
21983 | struct comp_unit_head cu_header_local; |
21984 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 21985 | |
96408a79 SA |
21986 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21987 | ||
21988 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
21989 | } |
21990 | ||
9eae7c52 TT |
21991 | /* Return the offset size given in the compilation unit header for CU. */ |
21992 | ||
21993 | int | |
21994 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
21995 | { | |
96408a79 SA |
21996 | struct comp_unit_head cu_header_local; |
21997 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 21998 | |
96408a79 SA |
21999 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22000 | ||
22001 | return cu_headerp->offset_size; | |
22002 | } | |
22003 | ||
22004 | /* See its dwarf2loc.h declaration. */ | |
22005 | ||
22006 | int | |
22007 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
22008 | { | |
22009 | struct comp_unit_head cu_header_local; | |
22010 | const struct comp_unit_head *cu_headerp; | |
22011 | ||
22012 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
22013 | ||
22014 | if (cu_headerp->version == 2) | |
22015 | return cu_headerp->addr_size; | |
22016 | else | |
22017 | return cu_headerp->offset_size; | |
181cebd4 JK |
22018 | } |
22019 | ||
9aa1f1e3 TT |
22020 | /* Return the text offset of the CU. The returned offset comes from |
22021 | this CU's objfile. If this objfile came from a separate debuginfo | |
22022 | file, then the offset may be different from the corresponding | |
22023 | offset in the parent objfile. */ | |
22024 | ||
22025 | CORE_ADDR | |
22026 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
22027 | { | |
bb3fa9d0 | 22028 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
22029 | |
22030 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22031 | } | |
22032 | ||
348e048f DE |
22033 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
22034 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
22035 | |
22036 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 22037 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 22038 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
22039 | struct objfile *objfile) |
22040 | { | |
22041 | struct dwarf2_per_cu_data *this_cu; | |
22042 | int low, high; | |
36586728 | 22043 | const sect_offset *cu_off; |
ae038cb0 | 22044 | |
ae038cb0 DJ |
22045 | low = 0; |
22046 | high = dwarf2_per_objfile->n_comp_units - 1; | |
22047 | while (high > low) | |
22048 | { | |
36586728 | 22049 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 22050 | int mid = low + (high - low) / 2; |
9a619af0 | 22051 | |
36586728 TT |
22052 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
22053 | cu_off = &mid_cu->offset; | |
22054 | if (mid_cu->is_dwz > offset_in_dwz | |
22055 | || (mid_cu->is_dwz == offset_in_dwz | |
22056 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
22057 | high = mid; |
22058 | else | |
22059 | low = mid + 1; | |
22060 | } | |
22061 | gdb_assert (low == high); | |
36586728 TT |
22062 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
22063 | cu_off = &this_cu->offset; | |
22064 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 22065 | { |
36586728 | 22066 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
22067 | error (_("Dwarf Error: could not find partial DIE containing " |
22068 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 22069 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 22070 | |
b64f50a1 JK |
22071 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
22072 | <= offset.sect_off); | |
ae038cb0 DJ |
22073 | return dwarf2_per_objfile->all_comp_units[low-1]; |
22074 | } | |
22075 | else | |
22076 | { | |
22077 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
22078 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
22079 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
22080 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
22081 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
22082 | return this_cu; |
22083 | } | |
22084 | } | |
22085 | ||
23745b47 | 22086 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 22087 | |
9816fde3 | 22088 | static void |
23745b47 | 22089 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 22090 | { |
9816fde3 | 22091 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
22092 | per_cu->cu = cu; |
22093 | cu->per_cu = per_cu; | |
22094 | cu->objfile = per_cu->objfile; | |
93311388 | 22095 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
22096 | } |
22097 | ||
22098 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
22099 | ||
22100 | static void | |
95554aad TT |
22101 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
22102 | enum language pretend_language) | |
9816fde3 JK |
22103 | { |
22104 | struct attribute *attr; | |
22105 | ||
22106 | /* Set the language we're debugging. */ | |
22107 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
22108 | if (attr) | |
22109 | set_cu_language (DW_UNSND (attr), cu); | |
22110 | else | |
9cded63f | 22111 | { |
95554aad | 22112 | cu->language = pretend_language; |
9cded63f TT |
22113 | cu->language_defn = language_def (cu->language); |
22114 | } | |
dee91e82 | 22115 | |
7d45c7c3 | 22116 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
22117 | } |
22118 | ||
ae038cb0 DJ |
22119 | /* Release one cached compilation unit, CU. We unlink it from the tree |
22120 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
22121 | the caller is responsible for that. |
22122 | NOTE: DATA is a void * because this function is also used as a | |
22123 | cleanup routine. */ | |
ae038cb0 DJ |
22124 | |
22125 | static void | |
68dc6402 | 22126 | free_heap_comp_unit (void *data) |
ae038cb0 | 22127 | { |
9a3c8263 | 22128 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 22129 | |
23745b47 DE |
22130 | gdb_assert (cu->per_cu != NULL); |
22131 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
22132 | cu->per_cu = NULL; |
22133 | ||
22134 | obstack_free (&cu->comp_unit_obstack, NULL); | |
22135 | ||
22136 | xfree (cu); | |
22137 | } | |
22138 | ||
72bf9492 | 22139 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 22140 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 22141 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
22142 | |
22143 | static void | |
22144 | free_stack_comp_unit (void *data) | |
22145 | { | |
9a3c8263 | 22146 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 22147 | |
23745b47 DE |
22148 | gdb_assert (cu->per_cu != NULL); |
22149 | cu->per_cu->cu = NULL; | |
22150 | cu->per_cu = NULL; | |
22151 | ||
72bf9492 DJ |
22152 | obstack_free (&cu->comp_unit_obstack, NULL); |
22153 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
22154 | } |
22155 | ||
22156 | /* Free all cached compilation units. */ | |
22157 | ||
22158 | static void | |
22159 | free_cached_comp_units (void *data) | |
22160 | { | |
22161 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22162 | ||
22163 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22164 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22165 | while (per_cu != NULL) | |
22166 | { | |
22167 | struct dwarf2_per_cu_data *next_cu; | |
22168 | ||
22169 | next_cu = per_cu->cu->read_in_chain; | |
22170 | ||
68dc6402 | 22171 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22172 | *last_chain = next_cu; |
22173 | ||
22174 | per_cu = next_cu; | |
22175 | } | |
22176 | } | |
22177 | ||
22178 | /* Increase the age counter on each cached compilation unit, and free | |
22179 | any that are too old. */ | |
22180 | ||
22181 | static void | |
22182 | age_cached_comp_units (void) | |
22183 | { | |
22184 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22185 | ||
22186 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
22187 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22188 | while (per_cu != NULL) | |
22189 | { | |
22190 | per_cu->cu->last_used ++; | |
b4f54984 | 22191 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
22192 | dwarf2_mark (per_cu->cu); |
22193 | per_cu = per_cu->cu->read_in_chain; | |
22194 | } | |
22195 | ||
22196 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22197 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22198 | while (per_cu != NULL) | |
22199 | { | |
22200 | struct dwarf2_per_cu_data *next_cu; | |
22201 | ||
22202 | next_cu = per_cu->cu->read_in_chain; | |
22203 | ||
22204 | if (!per_cu->cu->mark) | |
22205 | { | |
68dc6402 | 22206 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22207 | *last_chain = next_cu; |
22208 | } | |
22209 | else | |
22210 | last_chain = &per_cu->cu->read_in_chain; | |
22211 | ||
22212 | per_cu = next_cu; | |
22213 | } | |
22214 | } | |
22215 | ||
22216 | /* Remove a single compilation unit from the cache. */ | |
22217 | ||
22218 | static void | |
dee91e82 | 22219 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
22220 | { |
22221 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22222 | ||
22223 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22224 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22225 | while (per_cu != NULL) | |
22226 | { | |
22227 | struct dwarf2_per_cu_data *next_cu; | |
22228 | ||
22229 | next_cu = per_cu->cu->read_in_chain; | |
22230 | ||
dee91e82 | 22231 | if (per_cu == target_per_cu) |
ae038cb0 | 22232 | { |
68dc6402 | 22233 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 22234 | per_cu->cu = NULL; |
ae038cb0 DJ |
22235 | *last_chain = next_cu; |
22236 | break; | |
22237 | } | |
22238 | else | |
22239 | last_chain = &per_cu->cu->read_in_chain; | |
22240 | ||
22241 | per_cu = next_cu; | |
22242 | } | |
22243 | } | |
22244 | ||
fe3e1990 DJ |
22245 | /* Release all extra memory associated with OBJFILE. */ |
22246 | ||
22247 | void | |
22248 | dwarf2_free_objfile (struct objfile *objfile) | |
22249 | { | |
9a3c8263 SM |
22250 | dwarf2_per_objfile |
22251 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
22252 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
22253 | |
22254 | if (dwarf2_per_objfile == NULL) | |
22255 | return; | |
22256 | ||
22257 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
22258 | free_cached_comp_units (NULL); | |
22259 | ||
7b9f3c50 DE |
22260 | if (dwarf2_per_objfile->quick_file_names_table) |
22261 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 22262 | |
527f3840 JK |
22263 | if (dwarf2_per_objfile->line_header_hash) |
22264 | htab_delete (dwarf2_per_objfile->line_header_hash); | |
22265 | ||
fe3e1990 DJ |
22266 | /* Everything else should be on the objfile obstack. */ |
22267 | } | |
22268 | ||
dee91e82 DE |
22269 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
22270 | We store these in a hash table separate from the DIEs, and preserve them | |
22271 | when the DIEs are flushed out of cache. | |
22272 | ||
22273 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 22274 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
22275 | or the type may come from a DWO file. Furthermore, while it's more logical |
22276 | to use per_cu->section+offset, with Fission the section with the data is in | |
22277 | the DWO file but we don't know that section at the point we need it. | |
22278 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
22279 | because we can enter the lookup routine, get_die_type_at_offset, from | |
22280 | outside this file, and thus won't necessarily have PER_CU->cu. | |
22281 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 22282 | |
dee91e82 | 22283 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 22284 | { |
dee91e82 | 22285 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 22286 | sect_offset offset; |
1c379e20 DJ |
22287 | struct type *type; |
22288 | }; | |
22289 | ||
dee91e82 | 22290 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22291 | |
22292 | static hashval_t | |
dee91e82 | 22293 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 22294 | { |
9a3c8263 SM |
22295 | const struct dwarf2_per_cu_offset_and_type *ofs |
22296 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 22297 | |
dee91e82 | 22298 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
22299 | } |
22300 | ||
dee91e82 | 22301 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22302 | |
22303 | static int | |
dee91e82 | 22304 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 22305 | { |
9a3c8263 SM |
22306 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
22307 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
22308 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
22309 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 22310 | |
dee91e82 DE |
22311 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
22312 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
22313 | } |
22314 | ||
22315 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
22316 | table if necessary. For convenience, return TYPE. |
22317 | ||
22318 | The DIEs reading must have careful ordering to: | |
22319 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
22320 | reading current DIE. | |
22321 | * Not trying to dereference contents of still incompletely read in types | |
22322 | while reading in other DIEs. | |
22323 | * Enable referencing still incompletely read in types just by a pointer to | |
22324 | the type without accessing its fields. | |
22325 | ||
22326 | Therefore caller should follow these rules: | |
22327 | * Try to fetch any prerequisite types we may need to build this DIE type | |
22328 | before building the type and calling set_die_type. | |
e71ec853 | 22329 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
22330 | possible before fetching more types to complete the current type. |
22331 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 22332 | |
f792889a | 22333 | static struct type * |
1c379e20 DJ |
22334 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
22335 | { | |
dee91e82 | 22336 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 22337 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
22338 | struct attribute *attr; |
22339 | struct dynamic_prop prop; | |
1c379e20 | 22340 | |
b4ba55a1 JB |
22341 | /* For Ada types, make sure that the gnat-specific data is always |
22342 | initialized (if not already set). There are a few types where | |
22343 | we should not be doing so, because the type-specific area is | |
22344 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
22345 | where the type-specific area is used to store the floatformat). | |
22346 | But this is not a problem, because the gnat-specific information | |
22347 | is actually not needed for these types. */ | |
22348 | if (need_gnat_info (cu) | |
22349 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
22350 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
22351 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
22352 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
22353 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
22354 | && !HAVE_GNAT_AUX_INFO (type)) |
22355 | INIT_GNAT_SPECIFIC (type); | |
22356 | ||
3f2f83dd KB |
22357 | /* Read DW_AT_allocated and set in type. */ |
22358 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
22359 | if (attr_form_is_block (attr)) | |
22360 | { | |
22361 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
22362 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
22363 | } | |
22364 | else if (attr != NULL) | |
22365 | { | |
22366 | complaint (&symfile_complaints, | |
22367 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), | |
22368 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
22369 | die->offset.sect_off); | |
22370 | } | |
22371 | ||
22372 | /* Read DW_AT_associated and set in type. */ | |
22373 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
22374 | if (attr_form_is_block (attr)) | |
22375 | { | |
22376 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
22377 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
22378 | } | |
22379 | else if (attr != NULL) | |
22380 | { | |
22381 | complaint (&symfile_complaints, | |
22382 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), | |
22383 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
22384 | die->offset.sect_off); | |
22385 | } | |
22386 | ||
3cdcd0ce JB |
22387 | /* Read DW_AT_data_location and set in type. */ |
22388 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
22389 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 22390 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 22391 | |
dee91e82 | 22392 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 22393 | { |
dee91e82 DE |
22394 | dwarf2_per_objfile->die_type_hash = |
22395 | htab_create_alloc_ex (127, | |
22396 | per_cu_offset_and_type_hash, | |
22397 | per_cu_offset_and_type_eq, | |
22398 | NULL, | |
22399 | &objfile->objfile_obstack, | |
22400 | hashtab_obstack_allocate, | |
22401 | dummy_obstack_deallocate); | |
f792889a | 22402 | } |
1c379e20 | 22403 | |
dee91e82 | 22404 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
22405 | ofs.offset = die->offset; |
22406 | ofs.type = type; | |
dee91e82 DE |
22407 | slot = (struct dwarf2_per_cu_offset_and_type **) |
22408 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
22409 | if (*slot) |
22410 | complaint (&symfile_complaints, | |
22411 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 22412 | die->offset.sect_off); |
8d749320 SM |
22413 | *slot = XOBNEW (&objfile->objfile_obstack, |
22414 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 22415 | **slot = ofs; |
f792889a | 22416 | return type; |
1c379e20 DJ |
22417 | } |
22418 | ||
02142a6c DE |
22419 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
22420 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
22421 | |
22422 | static struct type * | |
b64f50a1 | 22423 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 22424 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 22425 | { |
dee91e82 | 22426 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 22427 | |
dee91e82 | 22428 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 22429 | return NULL; |
1c379e20 | 22430 | |
dee91e82 | 22431 | ofs.per_cu = per_cu; |
673bfd45 | 22432 | ofs.offset = offset; |
9a3c8263 SM |
22433 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
22434 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
22435 | if (slot) |
22436 | return slot->type; | |
22437 | else | |
22438 | return NULL; | |
22439 | } | |
22440 | ||
02142a6c | 22441 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
22442 | or return NULL if DIE does not have a saved type. */ |
22443 | ||
22444 | static struct type * | |
22445 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
22446 | { | |
22447 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
22448 | } | |
22449 | ||
10b3939b DJ |
22450 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
22451 | ||
22452 | static void | |
22453 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
22454 | struct dwarf2_per_cu_data *ref_per_cu) | |
22455 | { | |
22456 | void **slot; | |
22457 | ||
22458 | if (cu->dependencies == NULL) | |
22459 | cu->dependencies | |
22460 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
22461 | NULL, &cu->comp_unit_obstack, | |
22462 | hashtab_obstack_allocate, | |
22463 | dummy_obstack_deallocate); | |
22464 | ||
22465 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
22466 | if (*slot == NULL) | |
22467 | *slot = ref_per_cu; | |
22468 | } | |
1c379e20 | 22469 | |
f504f079 DE |
22470 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
22471 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
22472 | cache that we must keep because we are keeping CU. */ |
22473 | ||
10b3939b DJ |
22474 | static int |
22475 | dwarf2_mark_helper (void **slot, void *data) | |
22476 | { | |
22477 | struct dwarf2_per_cu_data *per_cu; | |
22478 | ||
22479 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
22480 | |
22481 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
22482 | reading of the chain. As such dependencies remain valid it is not much | |
22483 | useful to track and undo them during QUIT cleanups. */ | |
22484 | if (per_cu->cu == NULL) | |
22485 | return 1; | |
22486 | ||
10b3939b DJ |
22487 | if (per_cu->cu->mark) |
22488 | return 1; | |
22489 | per_cu->cu->mark = 1; | |
22490 | ||
22491 | if (per_cu->cu->dependencies != NULL) | |
22492 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
22493 | ||
22494 | return 1; | |
22495 | } | |
22496 | ||
f504f079 DE |
22497 | /* Set the mark field in CU and in every other compilation unit in the |
22498 | cache that we must keep because we are keeping CU. */ | |
22499 | ||
ae038cb0 DJ |
22500 | static void |
22501 | dwarf2_mark (struct dwarf2_cu *cu) | |
22502 | { | |
22503 | if (cu->mark) | |
22504 | return; | |
22505 | cu->mark = 1; | |
10b3939b DJ |
22506 | if (cu->dependencies != NULL) |
22507 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
22508 | } |
22509 | ||
22510 | static void | |
22511 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
22512 | { | |
22513 | while (per_cu) | |
22514 | { | |
22515 | per_cu->cu->mark = 0; | |
22516 | per_cu = per_cu->cu->read_in_chain; | |
22517 | } | |
72bf9492 DJ |
22518 | } |
22519 | ||
72bf9492 DJ |
22520 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
22521 | is its offset in .debug_info for this objfile. */ | |
22522 | ||
22523 | static hashval_t | |
22524 | partial_die_hash (const void *item) | |
22525 | { | |
9a3c8263 SM |
22526 | const struct partial_die_info *part_die |
22527 | = (const struct partial_die_info *) item; | |
9a619af0 | 22528 | |
b64f50a1 | 22529 | return part_die->offset.sect_off; |
72bf9492 DJ |
22530 | } |
22531 | ||
22532 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
22533 | are equal if they have the same offset. */ | |
22534 | ||
22535 | static int | |
22536 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
22537 | { | |
9a3c8263 SM |
22538 | const struct partial_die_info *part_die_lhs |
22539 | = (const struct partial_die_info *) item_lhs; | |
22540 | const struct partial_die_info *part_die_rhs | |
22541 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 22542 | |
b64f50a1 | 22543 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
22544 | } |
22545 | ||
b4f54984 DE |
22546 | static struct cmd_list_element *set_dwarf_cmdlist; |
22547 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
22548 | |
22549 | static void | |
b4f54984 | 22550 | set_dwarf_cmd (char *args, int from_tty) |
ae038cb0 | 22551 | { |
b4f54984 | 22552 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 22553 | gdb_stdout); |
ae038cb0 DJ |
22554 | } |
22555 | ||
22556 | static void | |
b4f54984 | 22557 | show_dwarf_cmd (char *args, int from_tty) |
6e70227d | 22558 | { |
b4f54984 | 22559 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
22560 | } |
22561 | ||
4bf44c1c | 22562 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
22563 | |
22564 | static void | |
c1bd65d0 | 22565 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 22566 | { |
9a3c8263 | 22567 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 22568 | int ix; |
8b70b953 | 22569 | |
626f2d1c TT |
22570 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
22571 | cleaning up. */ | |
22572 | dwarf2_per_objfile = NULL; | |
22573 | ||
59b0c7c1 JB |
22574 | for (ix = 0; ix < data->n_comp_units; ++ix) |
22575 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 22576 | |
59b0c7c1 | 22577 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 22578 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
22579 | data->all_type_units[ix]->per_cu.imported_symtabs); |
22580 | xfree (data->all_type_units); | |
95554aad | 22581 | |
8b70b953 | 22582 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
22583 | |
22584 | if (data->dwo_files) | |
22585 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
22586 | if (data->dwp_file) |
22587 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
22588 | |
22589 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
22590 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
22591 | } |
22592 | ||
22593 | \f | |
ae2de4f8 | 22594 | /* The "save gdb-index" command. */ |
9291a0cd TT |
22595 | |
22596 | /* The contents of the hash table we create when building the string | |
22597 | table. */ | |
22598 | struct strtab_entry | |
22599 | { | |
22600 | offset_type offset; | |
22601 | const char *str; | |
22602 | }; | |
22603 | ||
559a7a62 JK |
22604 | /* Hash function for a strtab_entry. |
22605 | ||
22606 | Function is used only during write_hash_table so no index format backward | |
22607 | compatibility is needed. */ | |
b89be57b | 22608 | |
9291a0cd TT |
22609 | static hashval_t |
22610 | hash_strtab_entry (const void *e) | |
22611 | { | |
9a3c8263 | 22612 | const struct strtab_entry *entry = (const struct strtab_entry *) e; |
559a7a62 | 22613 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
22614 | } |
22615 | ||
22616 | /* Equality function for a strtab_entry. */ | |
b89be57b | 22617 | |
9291a0cd TT |
22618 | static int |
22619 | eq_strtab_entry (const void *a, const void *b) | |
22620 | { | |
9a3c8263 SM |
22621 | const struct strtab_entry *ea = (const struct strtab_entry *) a; |
22622 | const struct strtab_entry *eb = (const struct strtab_entry *) b; | |
9291a0cd TT |
22623 | return !strcmp (ea->str, eb->str); |
22624 | } | |
22625 | ||
22626 | /* Create a strtab_entry hash table. */ | |
b89be57b | 22627 | |
9291a0cd TT |
22628 | static htab_t |
22629 | create_strtab (void) | |
22630 | { | |
22631 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
22632 | xfree, xcalloc, xfree); | |
22633 | } | |
22634 | ||
22635 | /* Add a string to the constant pool. Return the string's offset in | |
22636 | host order. */ | |
b89be57b | 22637 | |
9291a0cd TT |
22638 | static offset_type |
22639 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
22640 | { | |
22641 | void **slot; | |
22642 | struct strtab_entry entry; | |
22643 | struct strtab_entry *result; | |
22644 | ||
22645 | entry.str = str; | |
22646 | slot = htab_find_slot (table, &entry, INSERT); | |
22647 | if (*slot) | |
9a3c8263 | 22648 | result = (struct strtab_entry *) *slot; |
9291a0cd TT |
22649 | else |
22650 | { | |
22651 | result = XNEW (struct strtab_entry); | |
22652 | result->offset = obstack_object_size (cpool); | |
22653 | result->str = str; | |
22654 | obstack_grow_str0 (cpool, str); | |
22655 | *slot = result; | |
22656 | } | |
22657 | return result->offset; | |
22658 | } | |
22659 | ||
22660 | /* An entry in the symbol table. */ | |
22661 | struct symtab_index_entry | |
22662 | { | |
22663 | /* The name of the symbol. */ | |
22664 | const char *name; | |
22665 | /* The offset of the name in the constant pool. */ | |
22666 | offset_type index_offset; | |
22667 | /* A sorted vector of the indices of all the CUs that hold an object | |
22668 | of this name. */ | |
22669 | VEC (offset_type) *cu_indices; | |
22670 | }; | |
22671 | ||
22672 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
22673 | struct mapped_symtab | |
22674 | { | |
22675 | offset_type n_elements; | |
22676 | offset_type size; | |
22677 | struct symtab_index_entry **data; | |
22678 | }; | |
22679 | ||
22680 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 22681 | |
9291a0cd TT |
22682 | static hashval_t |
22683 | hash_symtab_entry (const void *e) | |
22684 | { | |
9a3c8263 SM |
22685 | const struct symtab_index_entry *entry |
22686 | = (const struct symtab_index_entry *) e; | |
9291a0cd TT |
22687 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), |
22688 | sizeof (offset_type) * VEC_length (offset_type, | |
22689 | entry->cu_indices), | |
22690 | 0); | |
22691 | } | |
22692 | ||
22693 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 22694 | |
9291a0cd TT |
22695 | static int |
22696 | eq_symtab_entry (const void *a, const void *b) | |
22697 | { | |
9a3c8263 SM |
22698 | const struct symtab_index_entry *ea = (const struct symtab_index_entry *) a; |
22699 | const struct symtab_index_entry *eb = (const struct symtab_index_entry *) b; | |
9291a0cd TT |
22700 | int len = VEC_length (offset_type, ea->cu_indices); |
22701 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
22702 | return 0; | |
22703 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
22704 | VEC_address (offset_type, eb->cu_indices), | |
22705 | sizeof (offset_type) * len); | |
22706 | } | |
22707 | ||
22708 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 22709 | |
9291a0cd TT |
22710 | static void |
22711 | delete_symtab_entry (void *p) | |
22712 | { | |
9a3c8263 | 22713 | struct symtab_index_entry *entry = (struct symtab_index_entry *) p; |
9291a0cd TT |
22714 | VEC_free (offset_type, entry->cu_indices); |
22715 | xfree (entry); | |
22716 | } | |
22717 | ||
22718 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 22719 | |
9291a0cd | 22720 | static htab_t |
3876f04e | 22721 | create_symbol_hash_table (void) |
9291a0cd TT |
22722 | { |
22723 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
22724 | delete_symtab_entry, xcalloc, xfree); | |
22725 | } | |
22726 | ||
22727 | /* Create a new mapped symtab object. */ | |
b89be57b | 22728 | |
9291a0cd TT |
22729 | static struct mapped_symtab * |
22730 | create_mapped_symtab (void) | |
22731 | { | |
22732 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
22733 | symtab->n_elements = 0; | |
22734 | symtab->size = 1024; | |
22735 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22736 | return symtab; | |
22737 | } | |
22738 | ||
22739 | /* Destroy a mapped_symtab. */ | |
b89be57b | 22740 | |
9291a0cd TT |
22741 | static void |
22742 | cleanup_mapped_symtab (void *p) | |
22743 | { | |
9a3c8263 | 22744 | struct mapped_symtab *symtab = (struct mapped_symtab *) p; |
9291a0cd TT |
22745 | /* The contents of the array are freed when the other hash table is |
22746 | destroyed. */ | |
22747 | xfree (symtab->data); | |
22748 | xfree (symtab); | |
22749 | } | |
22750 | ||
22751 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
22752 | the slot. |
22753 | ||
22754 | Function is used only during write_hash_table so no index format backward | |
22755 | compatibility is needed. */ | |
b89be57b | 22756 | |
9291a0cd TT |
22757 | static struct symtab_index_entry ** |
22758 | find_slot (struct mapped_symtab *symtab, const char *name) | |
22759 | { | |
559a7a62 | 22760 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
22761 | |
22762 | index = hash & (symtab->size - 1); | |
22763 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
22764 | ||
22765 | for (;;) | |
22766 | { | |
22767 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
22768 | return &symtab->data[index]; | |
22769 | index = (index + step) & (symtab->size - 1); | |
22770 | } | |
22771 | } | |
22772 | ||
22773 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 22774 | |
9291a0cd TT |
22775 | static void |
22776 | hash_expand (struct mapped_symtab *symtab) | |
22777 | { | |
22778 | offset_type old_size = symtab->size; | |
22779 | offset_type i; | |
22780 | struct symtab_index_entry **old_entries = symtab->data; | |
22781 | ||
22782 | symtab->size *= 2; | |
22783 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22784 | ||
22785 | for (i = 0; i < old_size; ++i) | |
22786 | { | |
22787 | if (old_entries[i]) | |
22788 | { | |
22789 | struct symtab_index_entry **slot = find_slot (symtab, | |
22790 | old_entries[i]->name); | |
22791 | *slot = old_entries[i]; | |
22792 | } | |
22793 | } | |
22794 | ||
22795 | xfree (old_entries); | |
22796 | } | |
22797 | ||
156942c7 DE |
22798 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
22799 | CU_INDEX is the index of the CU in which the symbol appears. | |
22800 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 22801 | |
9291a0cd TT |
22802 | static void |
22803 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 22804 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
22805 | offset_type cu_index) |
22806 | { | |
22807 | struct symtab_index_entry **slot; | |
156942c7 | 22808 | offset_type cu_index_and_attrs; |
9291a0cd TT |
22809 | |
22810 | ++symtab->n_elements; | |
22811 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
22812 | hash_expand (symtab); | |
22813 | ||
22814 | slot = find_slot (symtab, name); | |
22815 | if (!*slot) | |
22816 | { | |
22817 | *slot = XNEW (struct symtab_index_entry); | |
22818 | (*slot)->name = name; | |
156942c7 | 22819 | /* index_offset is set later. */ |
9291a0cd TT |
22820 | (*slot)->cu_indices = NULL; |
22821 | } | |
156942c7 DE |
22822 | |
22823 | cu_index_and_attrs = 0; | |
22824 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
22825 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
22826 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
22827 | ||
22828 | /* We don't want to record an index value twice as we want to avoid the | |
22829 | duplication. | |
22830 | We process all global symbols and then all static symbols | |
22831 | (which would allow us to avoid the duplication by only having to check | |
22832 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
22833 | To keep things simple we don't worry about the duplication here and | |
22834 | sort and uniqufy the list after we've processed all symbols. */ | |
22835 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
22836 | } | |
22837 | ||
22838 | /* qsort helper routine for uniquify_cu_indices. */ | |
22839 | ||
22840 | static int | |
22841 | offset_type_compare (const void *ap, const void *bp) | |
22842 | { | |
22843 | offset_type a = *(offset_type *) ap; | |
22844 | offset_type b = *(offset_type *) bp; | |
22845 | ||
22846 | return (a > b) - (b > a); | |
22847 | } | |
22848 | ||
22849 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
22850 | ||
22851 | static void | |
22852 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
22853 | { | |
22854 | int i; | |
22855 | ||
22856 | for (i = 0; i < symtab->size; ++i) | |
22857 | { | |
22858 | struct symtab_index_entry *entry = symtab->data[i]; | |
22859 | ||
22860 | if (entry | |
22861 | && entry->cu_indices != NULL) | |
22862 | { | |
22863 | unsigned int next_to_insert, next_to_check; | |
22864 | offset_type last_value; | |
22865 | ||
22866 | qsort (VEC_address (offset_type, entry->cu_indices), | |
22867 | VEC_length (offset_type, entry->cu_indices), | |
22868 | sizeof (offset_type), offset_type_compare); | |
22869 | ||
22870 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
22871 | next_to_insert = 1; | |
22872 | for (next_to_check = 1; | |
22873 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
22874 | ++next_to_check) | |
22875 | { | |
22876 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
22877 | != last_value) | |
22878 | { | |
22879 | last_value = VEC_index (offset_type, entry->cu_indices, | |
22880 | next_to_check); | |
22881 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
22882 | last_value); | |
22883 | ++next_to_insert; | |
22884 | } | |
22885 | } | |
22886 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
22887 | } | |
22888 | } | |
9291a0cd TT |
22889 | } |
22890 | ||
22891 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 22892 | |
9291a0cd | 22893 | static offset_type |
3876f04e | 22894 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
22895 | struct symtab_index_entry *entry) |
22896 | { | |
22897 | void **slot; | |
22898 | ||
3876f04e | 22899 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
22900 | if (!*slot) |
22901 | { | |
22902 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
22903 | offset_type val = MAYBE_SWAP (len); | |
22904 | offset_type iter; | |
22905 | int i; | |
22906 | ||
22907 | *slot = entry; | |
22908 | entry->index_offset = obstack_object_size (cpool); | |
22909 | ||
22910 | obstack_grow (cpool, &val, sizeof (val)); | |
22911 | for (i = 0; | |
22912 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
22913 | ++i) | |
22914 | { | |
22915 | val = MAYBE_SWAP (iter); | |
22916 | obstack_grow (cpool, &val, sizeof (val)); | |
22917 | } | |
22918 | } | |
22919 | else | |
22920 | { | |
9a3c8263 SM |
22921 | struct symtab_index_entry *old_entry |
22922 | = (struct symtab_index_entry *) *slot; | |
9291a0cd TT |
22923 | entry->index_offset = old_entry->index_offset; |
22924 | entry = old_entry; | |
22925 | } | |
22926 | return entry->index_offset; | |
22927 | } | |
22928 | ||
22929 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
22930 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 22931 | |
9291a0cd TT |
22932 | static void |
22933 | write_hash_table (struct mapped_symtab *symtab, | |
22934 | struct obstack *output, struct obstack *cpool) | |
22935 | { | |
22936 | offset_type i; | |
3876f04e | 22937 | htab_t symbol_hash_table; |
9291a0cd TT |
22938 | htab_t str_table; |
22939 | ||
3876f04e | 22940 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 22941 | str_table = create_strtab (); |
3876f04e | 22942 | |
9291a0cd TT |
22943 | /* We add all the index vectors to the constant pool first, to |
22944 | ensure alignment is ok. */ | |
22945 | for (i = 0; i < symtab->size; ++i) | |
22946 | { | |
22947 | if (symtab->data[i]) | |
3876f04e | 22948 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
22949 | } |
22950 | ||
22951 | /* Now write out the hash table. */ | |
22952 | for (i = 0; i < symtab->size; ++i) | |
22953 | { | |
22954 | offset_type str_off, vec_off; | |
22955 | ||
22956 | if (symtab->data[i]) | |
22957 | { | |
22958 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
22959 | vec_off = symtab->data[i]->index_offset; | |
22960 | } | |
22961 | else | |
22962 | { | |
22963 | /* While 0 is a valid constant pool index, it is not valid | |
22964 | to have 0 for both offsets. */ | |
22965 | str_off = 0; | |
22966 | vec_off = 0; | |
22967 | } | |
22968 | ||
22969 | str_off = MAYBE_SWAP (str_off); | |
22970 | vec_off = MAYBE_SWAP (vec_off); | |
22971 | ||
22972 | obstack_grow (output, &str_off, sizeof (str_off)); | |
22973 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
22974 | } | |
22975 | ||
22976 | htab_delete (str_table); | |
3876f04e | 22977 | htab_delete (symbol_hash_table); |
9291a0cd TT |
22978 | } |
22979 | ||
0a5429f6 DE |
22980 | /* Struct to map psymtab to CU index in the index file. */ |
22981 | struct psymtab_cu_index_map | |
22982 | { | |
22983 | struct partial_symtab *psymtab; | |
22984 | unsigned int cu_index; | |
22985 | }; | |
22986 | ||
22987 | static hashval_t | |
22988 | hash_psymtab_cu_index (const void *item) | |
22989 | { | |
9a3c8263 SM |
22990 | const struct psymtab_cu_index_map *map |
22991 | = (const struct psymtab_cu_index_map *) item; | |
0a5429f6 DE |
22992 | |
22993 | return htab_hash_pointer (map->psymtab); | |
22994 | } | |
22995 | ||
22996 | static int | |
22997 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
22998 | { | |
9a3c8263 SM |
22999 | const struct psymtab_cu_index_map *lhs |
23000 | = (const struct psymtab_cu_index_map *) item_lhs; | |
23001 | const struct psymtab_cu_index_map *rhs | |
23002 | = (const struct psymtab_cu_index_map *) item_rhs; | |
0a5429f6 DE |
23003 | |
23004 | return lhs->psymtab == rhs->psymtab; | |
23005 | } | |
23006 | ||
23007 | /* Helper struct for building the address table. */ | |
23008 | struct addrmap_index_data | |
23009 | { | |
23010 | struct objfile *objfile; | |
23011 | struct obstack *addr_obstack; | |
23012 | htab_t cu_index_htab; | |
23013 | ||
23014 | /* Non-zero if the previous_* fields are valid. | |
23015 | We can't write an entry until we see the next entry (since it is only then | |
23016 | that we know the end of the entry). */ | |
23017 | int previous_valid; | |
23018 | /* Index of the CU in the table of all CUs in the index file. */ | |
23019 | unsigned int previous_cu_index; | |
0963b4bd | 23020 | /* Start address of the CU. */ |
0a5429f6 DE |
23021 | CORE_ADDR previous_cu_start; |
23022 | }; | |
23023 | ||
23024 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 23025 | |
9291a0cd | 23026 | static void |
0a5429f6 DE |
23027 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
23028 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 23029 | { |
0a5429f6 | 23030 | offset_type cu_index_to_write; |
948f8e3d | 23031 | gdb_byte addr[8]; |
9291a0cd TT |
23032 | CORE_ADDR baseaddr; |
23033 | ||
23034 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23035 | ||
0a5429f6 DE |
23036 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
23037 | obstack_grow (obstack, addr, 8); | |
23038 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
23039 | obstack_grow (obstack, addr, 8); | |
23040 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
23041 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
23042 | } | |
23043 | ||
23044 | /* Worker function for traversing an addrmap to build the address table. */ | |
23045 | ||
23046 | static int | |
23047 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
23048 | { | |
9a3c8263 SM |
23049 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
23050 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
23051 | |
23052 | if (data->previous_valid) | |
23053 | add_address_entry (data->objfile, data->addr_obstack, | |
23054 | data->previous_cu_start, start_addr, | |
23055 | data->previous_cu_index); | |
23056 | ||
23057 | data->previous_cu_start = start_addr; | |
23058 | if (pst != NULL) | |
23059 | { | |
23060 | struct psymtab_cu_index_map find_map, *map; | |
23061 | find_map.psymtab = pst; | |
9a3c8263 SM |
23062 | map = ((struct psymtab_cu_index_map *) |
23063 | htab_find (data->cu_index_htab, &find_map)); | |
0a5429f6 DE |
23064 | gdb_assert (map != NULL); |
23065 | data->previous_cu_index = map->cu_index; | |
23066 | data->previous_valid = 1; | |
23067 | } | |
23068 | else | |
23069 | data->previous_valid = 0; | |
23070 | ||
23071 | return 0; | |
23072 | } | |
23073 | ||
23074 | /* Write OBJFILE's address map to OBSTACK. | |
23075 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
23076 | in the index file. */ | |
23077 | ||
23078 | static void | |
23079 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
23080 | htab_t cu_index_htab) | |
23081 | { | |
23082 | struct addrmap_index_data addrmap_index_data; | |
23083 | ||
23084 | /* When writing the address table, we have to cope with the fact that | |
23085 | the addrmap iterator only provides the start of a region; we have to | |
23086 | wait until the next invocation to get the start of the next region. */ | |
23087 | ||
23088 | addrmap_index_data.objfile = objfile; | |
23089 | addrmap_index_data.addr_obstack = obstack; | |
23090 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
23091 | addrmap_index_data.previous_valid = 0; | |
23092 | ||
23093 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
23094 | &addrmap_index_data); | |
23095 | ||
23096 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
23097 | is valid, but we should still handle it. | |
23098 | The end address is recorded as the start of the next region, but that | |
23099 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
23100 | anyway. */ | |
23101 | if (addrmap_index_data.previous_valid) | |
23102 | add_address_entry (objfile, obstack, | |
23103 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
23104 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
23105 | } |
23106 | ||
156942c7 DE |
23107 | /* Return the symbol kind of PSYM. */ |
23108 | ||
23109 | static gdb_index_symbol_kind | |
23110 | symbol_kind (struct partial_symbol *psym) | |
23111 | { | |
23112 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
23113 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
23114 | ||
23115 | switch (domain) | |
23116 | { | |
23117 | case VAR_DOMAIN: | |
23118 | switch (aclass) | |
23119 | { | |
23120 | case LOC_BLOCK: | |
23121 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
23122 | case LOC_TYPEDEF: | |
23123 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23124 | case LOC_COMPUTED: | |
23125 | case LOC_CONST_BYTES: | |
23126 | case LOC_OPTIMIZED_OUT: | |
23127 | case LOC_STATIC: | |
23128 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23129 | case LOC_CONST: | |
23130 | /* Note: It's currently impossible to recognize psyms as enum values | |
23131 | short of reading the type info. For now punt. */ | |
23132 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23133 | default: | |
23134 | /* There are other LOC_FOO values that one might want to classify | |
23135 | as variables, but dwarf2read.c doesn't currently use them. */ | |
23136 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23137 | } | |
23138 | case STRUCT_DOMAIN: | |
23139 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23140 | default: | |
23141 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23142 | } | |
23143 | } | |
23144 | ||
9291a0cd | 23145 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 23146 | |
9291a0cd TT |
23147 | static void |
23148 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 23149 | htab_t psyms_seen, |
9291a0cd TT |
23150 | struct partial_symbol **psymp, |
23151 | int count, | |
987d643c TT |
23152 | offset_type cu_index, |
23153 | int is_static) | |
9291a0cd TT |
23154 | { |
23155 | for (; count-- > 0; ++psymp) | |
23156 | { | |
156942c7 DE |
23157 | struct partial_symbol *psym = *psymp; |
23158 | void **slot; | |
987d643c | 23159 | |
156942c7 | 23160 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 23161 | error (_("Ada is not currently supported by the index")); |
987d643c | 23162 | |
987d643c | 23163 | /* Only add a given psymbol once. */ |
156942c7 | 23164 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
23165 | if (!*slot) |
23166 | { | |
156942c7 DE |
23167 | gdb_index_symbol_kind kind = symbol_kind (psym); |
23168 | ||
23169 | *slot = psym; | |
23170 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
23171 | is_static, kind, cu_index); | |
987d643c | 23172 | } |
9291a0cd TT |
23173 | } |
23174 | } | |
23175 | ||
23176 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
23177 | exception if there is an error. */ | |
b89be57b | 23178 | |
9291a0cd TT |
23179 | static void |
23180 | write_obstack (FILE *file, struct obstack *obstack) | |
23181 | { | |
23182 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
23183 | file) | |
23184 | != obstack_object_size (obstack)) | |
23185 | error (_("couldn't data write to file")); | |
23186 | } | |
23187 | ||
23188 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 23189 | |
9291a0cd TT |
23190 | static void |
23191 | unlink_if_set (void *p) | |
23192 | { | |
9a3c8263 | 23193 | char **filename = (char **) p; |
9291a0cd TT |
23194 | if (*filename) |
23195 | unlink (*filename); | |
23196 | } | |
23197 | ||
1fd400ff TT |
23198 | /* A helper struct used when iterating over debug_types. */ |
23199 | struct signatured_type_index_data | |
23200 | { | |
23201 | struct objfile *objfile; | |
23202 | struct mapped_symtab *symtab; | |
23203 | struct obstack *types_list; | |
987d643c | 23204 | htab_t psyms_seen; |
1fd400ff TT |
23205 | int cu_index; |
23206 | }; | |
23207 | ||
23208 | /* A helper function that writes a single signatured_type to an | |
23209 | obstack. */ | |
b89be57b | 23210 | |
1fd400ff TT |
23211 | static int |
23212 | write_one_signatured_type (void **slot, void *d) | |
23213 | { | |
9a3c8263 SM |
23214 | struct signatured_type_index_data *info |
23215 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 23216 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 23217 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
23218 | gdb_byte val[8]; |
23219 | ||
23220 | write_psymbols (info->symtab, | |
987d643c | 23221 | info->psyms_seen, |
3e43a32a MS |
23222 | info->objfile->global_psymbols.list |
23223 | + psymtab->globals_offset, | |
987d643c TT |
23224 | psymtab->n_global_syms, info->cu_index, |
23225 | 0); | |
1fd400ff | 23226 | write_psymbols (info->symtab, |
987d643c | 23227 | info->psyms_seen, |
3e43a32a MS |
23228 | info->objfile->static_psymbols.list |
23229 | + psymtab->statics_offset, | |
987d643c TT |
23230 | psymtab->n_static_syms, info->cu_index, |
23231 | 1); | |
1fd400ff | 23232 | |
b64f50a1 JK |
23233 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23234 | entry->per_cu.offset.sect_off); | |
1fd400ff | 23235 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
23236 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23237 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
23238 | obstack_grow (info->types_list, val, 8); |
23239 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
23240 | obstack_grow (info->types_list, val, 8); | |
23241 | ||
23242 | ++info->cu_index; | |
23243 | ||
23244 | return 1; | |
23245 | } | |
23246 | ||
95554aad TT |
23247 | /* Recurse into all "included" dependencies and write their symbols as |
23248 | if they appeared in this psymtab. */ | |
23249 | ||
23250 | static void | |
23251 | recursively_write_psymbols (struct objfile *objfile, | |
23252 | struct partial_symtab *psymtab, | |
23253 | struct mapped_symtab *symtab, | |
23254 | htab_t psyms_seen, | |
23255 | offset_type cu_index) | |
23256 | { | |
23257 | int i; | |
23258 | ||
23259 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
23260 | if (psymtab->dependencies[i]->user != NULL) | |
23261 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
23262 | symtab, psyms_seen, cu_index); | |
23263 | ||
23264 | write_psymbols (symtab, | |
23265 | psyms_seen, | |
23266 | objfile->global_psymbols.list + psymtab->globals_offset, | |
23267 | psymtab->n_global_syms, cu_index, | |
23268 | 0); | |
23269 | write_psymbols (symtab, | |
23270 | psyms_seen, | |
23271 | objfile->static_psymbols.list + psymtab->statics_offset, | |
23272 | psymtab->n_static_syms, cu_index, | |
23273 | 1); | |
23274 | } | |
23275 | ||
9291a0cd | 23276 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 23277 | |
9291a0cd TT |
23278 | static void |
23279 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
23280 | { | |
23281 | struct cleanup *cleanup; | |
23282 | char *filename, *cleanup_filename; | |
1fd400ff TT |
23283 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
23284 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
23285 | int i; |
23286 | FILE *out_file; | |
23287 | struct mapped_symtab *symtab; | |
23288 | offset_type val, size_of_contents, total_len; | |
23289 | struct stat st; | |
987d643c | 23290 | htab_t psyms_seen; |
0a5429f6 DE |
23291 | htab_t cu_index_htab; |
23292 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 23293 | |
9291a0cd TT |
23294 | if (dwarf2_per_objfile->using_index) |
23295 | error (_("Cannot use an index to create the index")); | |
23296 | ||
8b70b953 TT |
23297 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
23298 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
23299 | ||
260b681b DE |
23300 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
23301 | return; | |
23302 | ||
4262abfb JK |
23303 | if (stat (objfile_name (objfile), &st) < 0) |
23304 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 23305 | |
4262abfb | 23306 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
23307 | INDEX_SUFFIX, (char *) NULL); |
23308 | cleanup = make_cleanup (xfree, filename); | |
23309 | ||
614c279d | 23310 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
23311 | if (!out_file) |
23312 | error (_("Can't open `%s' for writing"), filename); | |
23313 | ||
23314 | cleanup_filename = filename; | |
23315 | make_cleanup (unlink_if_set, &cleanup_filename); | |
23316 | ||
23317 | symtab = create_mapped_symtab (); | |
23318 | make_cleanup (cleanup_mapped_symtab, symtab); | |
23319 | ||
23320 | obstack_init (&addr_obstack); | |
23321 | make_cleanup_obstack_free (&addr_obstack); | |
23322 | ||
23323 | obstack_init (&cu_list); | |
23324 | make_cleanup_obstack_free (&cu_list); | |
23325 | ||
1fd400ff TT |
23326 | obstack_init (&types_cu_list); |
23327 | make_cleanup_obstack_free (&types_cu_list); | |
23328 | ||
987d643c TT |
23329 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
23330 | NULL, xcalloc, xfree); | |
96408a79 | 23331 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 23332 | |
0a5429f6 DE |
23333 | /* While we're scanning CU's create a table that maps a psymtab pointer |
23334 | (which is what addrmap records) to its index (which is what is recorded | |
23335 | in the index file). This will later be needed to write the address | |
23336 | table. */ | |
23337 | cu_index_htab = htab_create_alloc (100, | |
23338 | hash_psymtab_cu_index, | |
23339 | eq_psymtab_cu_index, | |
23340 | NULL, xcalloc, xfree); | |
96408a79 | 23341 | make_cleanup_htab_delete (cu_index_htab); |
8d749320 SM |
23342 | psymtab_cu_index_map = XNEWVEC (struct psymtab_cu_index_map, |
23343 | dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
23344 | make_cleanup (xfree, psymtab_cu_index_map); |
23345 | ||
23346 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
23347 | work here. Also, the debug_types entries do not appear in |
23348 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
23349 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
23350 | { | |
3e43a32a MS |
23351 | struct dwarf2_per_cu_data *per_cu |
23352 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 23353 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 23354 | gdb_byte val[8]; |
0a5429f6 DE |
23355 | struct psymtab_cu_index_map *map; |
23356 | void **slot; | |
9291a0cd | 23357 | |
92fac807 JK |
23358 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
23359 | It may be referenced from a local scope but in such case it does not | |
23360 | need to be present in .gdb_index. */ | |
23361 | if (psymtab == NULL) | |
23362 | continue; | |
23363 | ||
95554aad TT |
23364 | if (psymtab->user == NULL) |
23365 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 23366 | |
0a5429f6 DE |
23367 | map = &psymtab_cu_index_map[i]; |
23368 | map->psymtab = psymtab; | |
23369 | map->cu_index = i; | |
23370 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
23371 | gdb_assert (slot != NULL); | |
23372 | gdb_assert (*slot == NULL); | |
23373 | *slot = map; | |
9291a0cd | 23374 | |
b64f50a1 JK |
23375 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23376 | per_cu->offset.sect_off); | |
9291a0cd | 23377 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 23378 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
23379 | obstack_grow (&cu_list, val, 8); |
23380 | } | |
23381 | ||
0a5429f6 DE |
23382 | /* Dump the address map. */ |
23383 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
23384 | ||
1fd400ff TT |
23385 | /* Write out the .debug_type entries, if any. */ |
23386 | if (dwarf2_per_objfile->signatured_types) | |
23387 | { | |
23388 | struct signatured_type_index_data sig_data; | |
23389 | ||
23390 | sig_data.objfile = objfile; | |
23391 | sig_data.symtab = symtab; | |
23392 | sig_data.types_list = &types_cu_list; | |
987d643c | 23393 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
23394 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
23395 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
23396 | write_one_signatured_type, &sig_data); | |
23397 | } | |
23398 | ||
156942c7 DE |
23399 | /* Now that we've processed all symbols we can shrink their cu_indices |
23400 | lists. */ | |
23401 | uniquify_cu_indices (symtab); | |
23402 | ||
9291a0cd TT |
23403 | obstack_init (&constant_pool); |
23404 | make_cleanup_obstack_free (&constant_pool); | |
23405 | obstack_init (&symtab_obstack); | |
23406 | make_cleanup_obstack_free (&symtab_obstack); | |
23407 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
23408 | ||
23409 | obstack_init (&contents); | |
23410 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 23411 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
23412 | total_len = size_of_contents; |
23413 | ||
23414 | /* The version number. */ | |
796a7ff8 | 23415 | val = MAYBE_SWAP (8); |
9291a0cd TT |
23416 | obstack_grow (&contents, &val, sizeof (val)); |
23417 | ||
23418 | /* The offset of the CU list from the start of the file. */ | |
23419 | val = MAYBE_SWAP (total_len); | |
23420 | obstack_grow (&contents, &val, sizeof (val)); | |
23421 | total_len += obstack_object_size (&cu_list); | |
23422 | ||
1fd400ff TT |
23423 | /* The offset of the types CU list from the start of the file. */ |
23424 | val = MAYBE_SWAP (total_len); | |
23425 | obstack_grow (&contents, &val, sizeof (val)); | |
23426 | total_len += obstack_object_size (&types_cu_list); | |
23427 | ||
9291a0cd TT |
23428 | /* The offset of the address table from the start of the file. */ |
23429 | val = MAYBE_SWAP (total_len); | |
23430 | obstack_grow (&contents, &val, sizeof (val)); | |
23431 | total_len += obstack_object_size (&addr_obstack); | |
23432 | ||
23433 | /* The offset of the symbol table from the start of the file. */ | |
23434 | val = MAYBE_SWAP (total_len); | |
23435 | obstack_grow (&contents, &val, sizeof (val)); | |
23436 | total_len += obstack_object_size (&symtab_obstack); | |
23437 | ||
23438 | /* The offset of the constant pool from the start of the file. */ | |
23439 | val = MAYBE_SWAP (total_len); | |
23440 | obstack_grow (&contents, &val, sizeof (val)); | |
23441 | total_len += obstack_object_size (&constant_pool); | |
23442 | ||
23443 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
23444 | ||
23445 | write_obstack (out_file, &contents); | |
23446 | write_obstack (out_file, &cu_list); | |
1fd400ff | 23447 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
23448 | write_obstack (out_file, &addr_obstack); |
23449 | write_obstack (out_file, &symtab_obstack); | |
23450 | write_obstack (out_file, &constant_pool); | |
23451 | ||
23452 | fclose (out_file); | |
23453 | ||
23454 | /* We want to keep the file, so we set cleanup_filename to NULL | |
23455 | here. See unlink_if_set. */ | |
23456 | cleanup_filename = NULL; | |
23457 | ||
23458 | do_cleanups (cleanup); | |
23459 | } | |
23460 | ||
90476074 TT |
23461 | /* Implementation of the `save gdb-index' command. |
23462 | ||
23463 | Note that the file format used by this command is documented in the | |
23464 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 23465 | |
9291a0cd TT |
23466 | static void |
23467 | save_gdb_index_command (char *arg, int from_tty) | |
23468 | { | |
23469 | struct objfile *objfile; | |
23470 | ||
23471 | if (!arg || !*arg) | |
96d19272 | 23472 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
23473 | |
23474 | ALL_OBJFILES (objfile) | |
23475 | { | |
23476 | struct stat st; | |
23477 | ||
23478 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 23479 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
23480 | continue; |
23481 | ||
9a3c8263 SM |
23482 | dwarf2_per_objfile |
23483 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23484 | dwarf2_objfile_data_key); | |
9291a0cd TT |
23485 | if (dwarf2_per_objfile) |
23486 | { | |
9291a0cd | 23487 | |
492d29ea | 23488 | TRY |
9291a0cd TT |
23489 | { |
23490 | write_psymtabs_to_index (objfile, arg); | |
23491 | } | |
492d29ea PA |
23492 | CATCH (except, RETURN_MASK_ERROR) |
23493 | { | |
23494 | exception_fprintf (gdb_stderr, except, | |
23495 | _("Error while writing index for `%s': "), | |
23496 | objfile_name (objfile)); | |
23497 | } | |
23498 | END_CATCH | |
9291a0cd TT |
23499 | } |
23500 | } | |
dce234bc PP |
23501 | } |
23502 | ||
9291a0cd TT |
23503 | \f |
23504 | ||
b4f54984 | 23505 | int dwarf_always_disassemble; |
9eae7c52 TT |
23506 | |
23507 | static void | |
b4f54984 DE |
23508 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
23509 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 23510 | { |
3e43a32a MS |
23511 | fprintf_filtered (file, |
23512 | _("Whether to always disassemble " | |
23513 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
23514 | value); |
23515 | } | |
23516 | ||
900e11f9 JK |
23517 | static void |
23518 | show_check_physname (struct ui_file *file, int from_tty, | |
23519 | struct cmd_list_element *c, const char *value) | |
23520 | { | |
23521 | fprintf_filtered (file, | |
23522 | _("Whether to check \"physname\" is %s.\n"), | |
23523 | value); | |
23524 | } | |
23525 | ||
6502dd73 DJ |
23526 | void _initialize_dwarf2_read (void); |
23527 | ||
23528 | void | |
23529 | _initialize_dwarf2_read (void) | |
23530 | { | |
96d19272 JK |
23531 | struct cmd_list_element *c; |
23532 | ||
dce234bc | 23533 | dwarf2_objfile_data_key |
c1bd65d0 | 23534 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 23535 | |
b4f54984 DE |
23536 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
23537 | Set DWARF specific variables.\n\ | |
23538 | Configure DWARF variables such as the cache size"), | |
23539 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
23540 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
23541 | ||
b4f54984 DE |
23542 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
23543 | Show DWARF specific variables\n\ | |
23544 | Show DWARF variables such as the cache size"), | |
23545 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
23546 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
23547 | ||
23548 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
23549 | &dwarf_max_cache_age, _("\ |
23550 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
23551 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
23552 | A higher limit means that cached compilation units will be stored\n\ |
23553 | in memory longer, and more total memory will be used. Zero disables\n\ | |
23554 | caching, which can slow down startup."), | |
2c5b56ce | 23555 | NULL, |
b4f54984 DE |
23556 | show_dwarf_max_cache_age, |
23557 | &set_dwarf_cmdlist, | |
23558 | &show_dwarf_cmdlist); | |
d97bc12b | 23559 | |
9eae7c52 | 23560 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 23561 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
23562 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
23563 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
23564 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
23565 | syntax. When disabled, expressions will be printed in a more\n\ | |
23566 | conversational style, when possible."), | |
23567 | NULL, | |
b4f54984 DE |
23568 | show_dwarf_always_disassemble, |
23569 | &set_dwarf_cmdlist, | |
23570 | &show_dwarf_cmdlist); | |
23571 | ||
23572 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
23573 | Set debugging of the DWARF reader."), _("\ | |
23574 | Show debugging of the DWARF reader."), _("\ | |
23575 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
23576 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
23577 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
23578 | NULL, |
23579 | NULL, | |
23580 | &setdebuglist, &showdebuglist); | |
23581 | ||
b4f54984 DE |
23582 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
23583 | Set debugging of the DWARF DIE reader."), _("\ | |
23584 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
23585 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
23586 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
23587 | NULL, |
23588 | NULL, | |
23589 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23590 | |
27e0867f DE |
23591 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
23592 | Set debugging of the dwarf line reader."), _("\ | |
23593 | Show debugging of the dwarf line reader."), _("\ | |
23594 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
23595 | A value of 1 (one) provides basic information.\n\ | |
23596 | A value greater than 1 provides more verbose information."), | |
23597 | NULL, | |
23598 | NULL, | |
23599 | &setdebuglist, &showdebuglist); | |
23600 | ||
900e11f9 JK |
23601 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
23602 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
23603 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
23604 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
23605 | the demangler."), | |
23606 | NULL, show_check_physname, | |
23607 | &setdebuglist, &showdebuglist); | |
23608 | ||
e615022a DE |
23609 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
23610 | no_class, &use_deprecated_index_sections, _("\ | |
23611 | Set whether to use deprecated gdb_index sections."), _("\ | |
23612 | Show whether to use deprecated gdb_index sections."), _("\ | |
23613 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
23614 | Normally they are ignored either because of a missing feature or\n\ | |
23615 | performance issue.\n\ | |
23616 | Warning: This option must be enabled before gdb reads the file."), | |
23617 | NULL, | |
23618 | NULL, | |
23619 | &setlist, &showlist); | |
23620 | ||
96d19272 | 23621 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 23622 | _("\ |
fc1a9d6e | 23623 | Save a gdb-index file.\n\ |
11570e71 | 23624 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
23625 | &save_cmdlist); |
23626 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
23627 | |
23628 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23629 | &dwarf2_locexpr_funcs); | |
23630 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23631 | &dwarf2_loclist_funcs); | |
23632 | ||
23633 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23634 | &dwarf2_block_frame_base_locexpr_funcs); | |
23635 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23636 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 23637 | } |