Commit | Line | Data |
---|---|---|
c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
618f726f | 3 | Copyright (C) 1994-2016 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 KS |
55 | #include "typeprint.h" |
56 | #include "jv-lang.h" | |
ccefe4c4 | 57 | #include "psympriv.h" |
53ce3c39 | 58 | #include <sys/stat.h> |
96d19272 | 59 | #include "completer.h" |
34eaf542 | 60 | #include "vec.h" |
98bfdba5 | 61 | #include "c-lang.h" |
a766d390 | 62 | #include "go-lang.h" |
98bfdba5 | 63 | #include "valprint.h" |
3019eac3 | 64 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 65 | #include "gdb/gdb-index.h" |
60d5a603 | 66 | #include <ctype.h> |
cbb099e8 | 67 | #include "gdb_bfd.h" |
4357ac6c | 68 | #include "f-lang.h" |
05cba821 | 69 | #include "source.h" |
614c279d | 70 | #include "filestuff.h" |
dc294be5 | 71 | #include "build-id.h" |
22cee43f | 72 | #include "namespace.h" |
4c2df51b | 73 | |
c906108c | 74 | #include <fcntl.h> |
c906108c | 75 | #include <sys/types.h> |
d8151005 | 76 | |
34eaf542 TT |
77 | typedef struct symbol *symbolp; |
78 | DEF_VEC_P (symbolp); | |
79 | ||
73be47f5 DE |
80 | /* When == 1, print basic high level tracing messages. |
81 | When > 1, be more verbose. | |
b4f54984 DE |
82 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
83 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 84 | |
d97bc12b | 85 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 86 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 87 | |
27e0867f DE |
88 | /* When non-zero, dump line number entries as they are read in. */ |
89 | static unsigned int dwarf_line_debug = 0; | |
90 | ||
900e11f9 JK |
91 | /* When non-zero, cross-check physname against demangler. */ |
92 | static int check_physname = 0; | |
93 | ||
481860b3 | 94 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 95 | static int use_deprecated_index_sections = 0; |
481860b3 | 96 | |
6502dd73 DJ |
97 | static const struct objfile_data *dwarf2_objfile_data_key; |
98 | ||
f1e6e072 TT |
99 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
100 | ||
101 | static int dwarf2_locexpr_index; | |
102 | static int dwarf2_loclist_index; | |
103 | static int dwarf2_locexpr_block_index; | |
104 | static int dwarf2_loclist_block_index; | |
105 | ||
73869dc2 DE |
106 | /* A descriptor for dwarf sections. |
107 | ||
108 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
109 | scanned. BUFFER, READIN are filled in later when the section is read. | |
110 | If the section contained compressed data then SIZE is updated to record | |
111 | the uncompressed size of the section. | |
112 | ||
113 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
114 | creating the concept of virtual sections contained within a real section. | |
115 | In DWP V2 the sections of the input DWO files are concatenated together | |
116 | into one section, but section offsets are kept relative to the original | |
117 | input section. | |
118 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
119 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
120 | describe the virtual section. */ | |
121 | ||
dce234bc PP |
122 | struct dwarf2_section_info |
123 | { | |
73869dc2 DE |
124 | union |
125 | { | |
e5aa3347 | 126 | /* If this is a real section, the bfd section. */ |
049412e3 | 127 | asection *section; |
73869dc2 | 128 | /* If this is a virtual section, pointer to the containing ("real") |
e5aa3347 | 129 | section. */ |
73869dc2 DE |
130 | struct dwarf2_section_info *containing_section; |
131 | } s; | |
19ac8c2e | 132 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 133 | const gdb_byte *buffer; |
73869dc2 | 134 | /* The size of the section, real or virtual. */ |
dce234bc | 135 | bfd_size_type size; |
73869dc2 DE |
136 | /* If this is a virtual section, the offset in the real section. |
137 | Only valid if is_virtual. */ | |
138 | bfd_size_type virtual_offset; | |
be391dca | 139 | /* True if we have tried to read this section. */ |
73869dc2 DE |
140 | char readin; |
141 | /* True if this is a virtual section, False otherwise. | |
049412e3 | 142 | This specifies which of s.section and s.containing_section to use. */ |
73869dc2 | 143 | char is_virtual; |
dce234bc PP |
144 | }; |
145 | ||
8b70b953 TT |
146 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
147 | DEF_VEC_O (dwarf2_section_info_def); | |
148 | ||
9291a0cd TT |
149 | /* All offsets in the index are of this type. It must be |
150 | architecture-independent. */ | |
151 | typedef uint32_t offset_type; | |
152 | ||
153 | DEF_VEC_I (offset_type); | |
154 | ||
156942c7 DE |
155 | /* Ensure only legit values are used. */ |
156 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
157 | do { \ | |
158 | gdb_assert ((unsigned int) (value) <= 1); \ | |
159 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
160 | } while (0) | |
161 | ||
162 | /* Ensure only legit values are used. */ | |
163 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
164 | do { \ | |
165 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
166 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
167 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
168 | } while (0) | |
169 | ||
170 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
171 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
172 | do { \ | |
173 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
174 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
175 | } while (0) | |
176 | ||
9291a0cd TT |
177 | /* A description of the mapped index. The file format is described in |
178 | a comment by the code that writes the index. */ | |
179 | struct mapped_index | |
180 | { | |
559a7a62 JK |
181 | /* Index data format version. */ |
182 | int version; | |
183 | ||
9291a0cd TT |
184 | /* The total length of the buffer. */ |
185 | off_t total_size; | |
b11b1f88 | 186 | |
9291a0cd TT |
187 | /* A pointer to the address table data. */ |
188 | const gdb_byte *address_table; | |
b11b1f88 | 189 | |
9291a0cd TT |
190 | /* Size of the address table data in bytes. */ |
191 | offset_type address_table_size; | |
b11b1f88 | 192 | |
3876f04e DE |
193 | /* The symbol table, implemented as a hash table. */ |
194 | const offset_type *symbol_table; | |
b11b1f88 | 195 | |
9291a0cd | 196 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 197 | offset_type symbol_table_slots; |
b11b1f88 | 198 | |
9291a0cd TT |
199 | /* A pointer to the constant pool. */ |
200 | const char *constant_pool; | |
201 | }; | |
202 | ||
95554aad TT |
203 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
204 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
205 | ||
52059ffd TT |
206 | struct tu_stats |
207 | { | |
208 | int nr_uniq_abbrev_tables; | |
209 | int nr_symtabs; | |
210 | int nr_symtab_sharers; | |
211 | int nr_stmt_less_type_units; | |
212 | int nr_all_type_units_reallocs; | |
213 | }; | |
214 | ||
9cdd5dbd DE |
215 | /* Collection of data recorded per objfile. |
216 | This hangs off of dwarf2_objfile_data_key. */ | |
217 | ||
6502dd73 DJ |
218 | struct dwarf2_per_objfile |
219 | { | |
dce234bc PP |
220 | struct dwarf2_section_info info; |
221 | struct dwarf2_section_info abbrev; | |
222 | struct dwarf2_section_info line; | |
dce234bc PP |
223 | struct dwarf2_section_info loc; |
224 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 225 | struct dwarf2_section_info macro; |
dce234bc PP |
226 | struct dwarf2_section_info str; |
227 | struct dwarf2_section_info ranges; | |
3019eac3 | 228 | struct dwarf2_section_info addr; |
dce234bc PP |
229 | struct dwarf2_section_info frame; |
230 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 231 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 232 | |
8b70b953 TT |
233 | VEC (dwarf2_section_info_def) *types; |
234 | ||
be391dca TT |
235 | /* Back link. */ |
236 | struct objfile *objfile; | |
237 | ||
d467dd73 | 238 | /* Table of all the compilation units. This is used to locate |
10b3939b | 239 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
240 | struct dwarf2_per_cu_data **all_comp_units; |
241 | ||
242 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
243 | int n_comp_units; | |
244 | ||
1fd400ff | 245 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 246 | int n_type_units; |
1fd400ff | 247 | |
6aa5f3a6 DE |
248 | /* The number of elements allocated in all_type_units. |
249 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
250 | int n_allocated_type_units; | |
251 | ||
a2ce51a0 DE |
252 | /* The .debug_types-related CUs (TUs). |
253 | This is stored in malloc space because we may realloc it. */ | |
b4dd5633 | 254 | struct signatured_type **all_type_units; |
1fd400ff | 255 | |
f4dc4d17 DE |
256 | /* Table of struct type_unit_group objects. |
257 | The hash key is the DW_AT_stmt_list value. */ | |
258 | htab_t type_unit_groups; | |
72dca2f5 | 259 | |
348e048f DE |
260 | /* A table mapping .debug_types signatures to its signatured_type entry. |
261 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
262 | htab_t signatured_types; | |
263 | ||
f4dc4d17 DE |
264 | /* Type unit statistics, to see how well the scaling improvements |
265 | are doing. */ | |
52059ffd | 266 | struct tu_stats tu_stats; |
f4dc4d17 DE |
267 | |
268 | /* A chain of compilation units that are currently read in, so that | |
269 | they can be freed later. */ | |
270 | struct dwarf2_per_cu_data *read_in_chain; | |
271 | ||
3019eac3 DE |
272 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
273 | This is NULL if the table hasn't been allocated yet. */ | |
274 | htab_t dwo_files; | |
275 | ||
80626a55 DE |
276 | /* Non-zero if we've check for whether there is a DWP file. */ |
277 | int dwp_checked; | |
278 | ||
279 | /* The DWP file if there is one, or NULL. */ | |
280 | struct dwp_file *dwp_file; | |
281 | ||
36586728 TT |
282 | /* The shared '.dwz' file, if one exists. This is used when the |
283 | original data was compressed using 'dwz -m'. */ | |
284 | struct dwz_file *dwz_file; | |
285 | ||
72dca2f5 FR |
286 | /* A flag indicating wether this objfile has a section loaded at a |
287 | VMA of 0. */ | |
288 | int has_section_at_zero; | |
9291a0cd | 289 | |
ae2de4f8 DE |
290 | /* True if we are using the mapped index, |
291 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
292 | unsigned char using_index; |
293 | ||
ae2de4f8 | 294 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 295 | struct mapped_index *index_table; |
98bfdba5 | 296 | |
7b9f3c50 | 297 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
298 | TUs typically share line table entries with a CU, so we maintain a |
299 | separate table of all line table entries to support the sharing. | |
300 | Note that while there can be way more TUs than CUs, we've already | |
301 | sorted all the TUs into "type unit groups", grouped by their | |
302 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
303 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
304 | htab_t quick_file_names_table; |
305 | ||
98bfdba5 PA |
306 | /* Set during partial symbol reading, to prevent queueing of full |
307 | symbols. */ | |
308 | int reading_partial_symbols; | |
673bfd45 | 309 | |
dee91e82 | 310 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 311 | This is NULL if not allocated yet. |
02142a6c | 312 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 313 | htab_t die_type_hash; |
95554aad TT |
314 | |
315 | /* The CUs we recently read. */ | |
316 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
527f3840 JK |
317 | |
318 | /* Table containing line_header indexed by offset and offset_in_dwz. */ | |
319 | htab_t line_header_hash; | |
6502dd73 DJ |
320 | }; |
321 | ||
322 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 323 | |
251d32d9 | 324 | /* Default names of the debugging sections. */ |
c906108c | 325 | |
233a11ab CS |
326 | /* Note that if the debugging section has been compressed, it might |
327 | have a name like .zdebug_info. */ | |
328 | ||
9cdd5dbd DE |
329 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
330 | { | |
251d32d9 TG |
331 | { ".debug_info", ".zdebug_info" }, |
332 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
333 | { ".debug_line", ".zdebug_line" }, | |
334 | { ".debug_loc", ".zdebug_loc" }, | |
335 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 336 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
337 | { ".debug_str", ".zdebug_str" }, |
338 | { ".debug_ranges", ".zdebug_ranges" }, | |
339 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 340 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
341 | { ".debug_frame", ".zdebug_frame" }, |
342 | { ".eh_frame", NULL }, | |
24d3216f TT |
343 | { ".gdb_index", ".zgdb_index" }, |
344 | 23 | |
251d32d9 | 345 | }; |
c906108c | 346 | |
80626a55 | 347 | /* List of DWO/DWP sections. */ |
3019eac3 | 348 | |
80626a55 | 349 | static const struct dwop_section_names |
3019eac3 DE |
350 | { |
351 | struct dwarf2_section_names abbrev_dwo; | |
352 | struct dwarf2_section_names info_dwo; | |
353 | struct dwarf2_section_names line_dwo; | |
354 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
355 | struct dwarf2_section_names macinfo_dwo; |
356 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
357 | struct dwarf2_section_names str_dwo; |
358 | struct dwarf2_section_names str_offsets_dwo; | |
359 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
360 | struct dwarf2_section_names cu_index; |
361 | struct dwarf2_section_names tu_index; | |
3019eac3 | 362 | } |
80626a55 | 363 | dwop_section_names = |
3019eac3 DE |
364 | { |
365 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
366 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
367 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
368 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
369 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
370 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
371 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
372 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
373 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
374 | { ".debug_cu_index", ".zdebug_cu_index" }, |
375 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
376 | }; |
377 | ||
c906108c SS |
378 | /* local data types */ |
379 | ||
107d2387 AC |
380 | /* The data in a compilation unit header, after target2host |
381 | translation, looks like this. */ | |
c906108c | 382 | struct comp_unit_head |
a738430d | 383 | { |
c764a876 | 384 | unsigned int length; |
a738430d | 385 | short version; |
a738430d MK |
386 | unsigned char addr_size; |
387 | unsigned char signed_addr_p; | |
b64f50a1 | 388 | sect_offset abbrev_offset; |
57349743 | 389 | |
a738430d MK |
390 | /* Size of file offsets; either 4 or 8. */ |
391 | unsigned int offset_size; | |
57349743 | 392 | |
a738430d MK |
393 | /* Size of the length field; either 4 or 12. */ |
394 | unsigned int initial_length_size; | |
57349743 | 395 | |
a738430d MK |
396 | /* Offset to the first byte of this compilation unit header in the |
397 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 398 | sect_offset offset; |
57349743 | 399 | |
d00adf39 DE |
400 | /* Offset to first die in this cu from the start of the cu. |
401 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 402 | cu_offset first_die_offset; |
a738430d | 403 | }; |
c906108c | 404 | |
3da10d80 KS |
405 | /* Type used for delaying computation of method physnames. |
406 | See comments for compute_delayed_physnames. */ | |
407 | struct delayed_method_info | |
408 | { | |
409 | /* The type to which the method is attached, i.e., its parent class. */ | |
410 | struct type *type; | |
411 | ||
412 | /* The index of the method in the type's function fieldlists. */ | |
413 | int fnfield_index; | |
414 | ||
415 | /* The index of the method in the fieldlist. */ | |
416 | int index; | |
417 | ||
418 | /* The name of the DIE. */ | |
419 | const char *name; | |
420 | ||
421 | /* The DIE associated with this method. */ | |
422 | struct die_info *die; | |
423 | }; | |
424 | ||
425 | typedef struct delayed_method_info delayed_method_info; | |
426 | DEF_VEC_O (delayed_method_info); | |
427 | ||
e7c27a73 DJ |
428 | /* Internal state when decoding a particular compilation unit. */ |
429 | struct dwarf2_cu | |
430 | { | |
431 | /* The objfile containing this compilation unit. */ | |
432 | struct objfile *objfile; | |
433 | ||
d00adf39 | 434 | /* The header of the compilation unit. */ |
e7c27a73 | 435 | struct comp_unit_head header; |
e142c38c | 436 | |
d00adf39 DE |
437 | /* Base address of this compilation unit. */ |
438 | CORE_ADDR base_address; | |
439 | ||
440 | /* Non-zero if base_address has been set. */ | |
441 | int base_known; | |
442 | ||
e142c38c DJ |
443 | /* The language we are debugging. */ |
444 | enum language language; | |
445 | const struct language_defn *language_defn; | |
446 | ||
b0f35d58 DL |
447 | const char *producer; |
448 | ||
e142c38c DJ |
449 | /* The generic symbol table building routines have separate lists for |
450 | file scope symbols and all all other scopes (local scopes). So | |
451 | we need to select the right one to pass to add_symbol_to_list(). | |
452 | We do it by keeping a pointer to the correct list in list_in_scope. | |
453 | ||
454 | FIXME: The original dwarf code just treated the file scope as the | |
455 | first local scope, and all other local scopes as nested local | |
456 | scopes, and worked fine. Check to see if we really need to | |
457 | distinguish these in buildsym.c. */ | |
458 | struct pending **list_in_scope; | |
459 | ||
433df2d4 DE |
460 | /* The abbrev table for this CU. |
461 | Normally this points to the abbrev table in the objfile. | |
462 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
463 | struct abbrev_table *abbrev_table; | |
72bf9492 | 464 | |
b64f50a1 JK |
465 | /* Hash table holding all the loaded partial DIEs |
466 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
467 | htab_t partial_dies; |
468 | ||
469 | /* Storage for things with the same lifetime as this read-in compilation | |
470 | unit, including partial DIEs. */ | |
471 | struct obstack comp_unit_obstack; | |
472 | ||
ae038cb0 DJ |
473 | /* When multiple dwarf2_cu structures are living in memory, this field |
474 | chains them all together, so that they can be released efficiently. | |
475 | We will probably also want a generation counter so that most-recently-used | |
476 | compilation units are cached... */ | |
477 | struct dwarf2_per_cu_data *read_in_chain; | |
478 | ||
69d751e3 | 479 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
480 | struct dwarf2_per_cu_data *per_cu; |
481 | ||
482 | /* How many compilation units ago was this CU last referenced? */ | |
483 | int last_used; | |
484 | ||
b64f50a1 JK |
485 | /* A hash table of DIE cu_offset for following references with |
486 | die_info->offset.sect_off as hash. */ | |
51545339 | 487 | htab_t die_hash; |
10b3939b DJ |
488 | |
489 | /* Full DIEs if read in. */ | |
490 | struct die_info *dies; | |
491 | ||
492 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
493 | units referenced by this one. Only set during full symbol processing; | |
494 | partial symbol tables do not have dependencies. */ | |
495 | htab_t dependencies; | |
496 | ||
cb1df416 DJ |
497 | /* Header data from the line table, during full symbol processing. */ |
498 | struct line_header *line_header; | |
499 | ||
3da10d80 KS |
500 | /* A list of methods which need to have physnames computed |
501 | after all type information has been read. */ | |
502 | VEC (delayed_method_info) *method_list; | |
503 | ||
96408a79 SA |
504 | /* To be copied to symtab->call_site_htab. */ |
505 | htab_t call_site_htab; | |
506 | ||
034e5797 DE |
507 | /* Non-NULL if this CU came from a DWO file. |
508 | There is an invariant here that is important to remember: | |
509 | Except for attributes copied from the top level DIE in the "main" | |
510 | (or "stub") file in preparation for reading the DWO file | |
511 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
512 | Either there isn't a DWO file (in which case this is NULL and the point | |
513 | is moot), or there is and either we're not going to read it (in which | |
514 | case this is NULL) or there is and we are reading it (in which case this | |
515 | is non-NULL). */ | |
3019eac3 DE |
516 | struct dwo_unit *dwo_unit; |
517 | ||
518 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
519 | (zero is a valid value though). | |
1dbab08b | 520 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
521 | ULONGEST addr_base; |
522 | ||
2e3cf129 DE |
523 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
524 | (zero is a valid value though). | |
1dbab08b | 525 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 526 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
527 | be used without needing to know whether DWO files are in use or not. |
528 | N.B. This does not apply to DW_AT_ranges appearing in | |
529 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
530 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
531 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
532 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
533 | ULONGEST ranges_base; |
534 | ||
ae038cb0 DJ |
535 | /* Mark used when releasing cached dies. */ |
536 | unsigned int mark : 1; | |
537 | ||
8be455d7 JK |
538 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
539 | This test is imperfect as there may exist optimized debug code not using | |
540 | any location list and still facing inlining issues if handled as | |
541 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 542 | unsigned int has_loclist : 1; |
ba919b58 | 543 | |
1b80a9fa JK |
544 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
545 | if all the producer_is_* fields are valid. This information is cached | |
546 | because profiling CU expansion showed excessive time spent in | |
547 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
548 | unsigned int checked_producer : 1; |
549 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 550 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 551 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
552 | |
553 | /* When set, the file that we're processing is known to have | |
554 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
555 | this information, but later versions do. */ | |
556 | ||
557 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
558 | }; |
559 | ||
10b3939b DJ |
560 | /* Persistent data held for a compilation unit, even when not |
561 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 562 | read_symtab_private field of the psymtab. */ |
10b3939b | 563 | |
ae038cb0 DJ |
564 | struct dwarf2_per_cu_data |
565 | { | |
36586728 | 566 | /* The start offset and length of this compilation unit. |
45452591 | 567 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
568 | initial_length_size. |
569 | If the DIE refers to a DWO file, this is always of the original die, | |
570 | not the DWO file. */ | |
b64f50a1 | 571 | sect_offset offset; |
36586728 | 572 | unsigned int length; |
ae038cb0 DJ |
573 | |
574 | /* Flag indicating this compilation unit will be read in before | |
575 | any of the current compilation units are processed. */ | |
c764a876 | 576 | unsigned int queued : 1; |
ae038cb0 | 577 | |
0d99eb77 DE |
578 | /* This flag will be set when reading partial DIEs if we need to load |
579 | absolutely all DIEs for this compilation unit, instead of just the ones | |
580 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
581 | hash table and don't find it. */ |
582 | unsigned int load_all_dies : 1; | |
583 | ||
0186c6a7 DE |
584 | /* Non-zero if this CU is from .debug_types. |
585 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
586 | this is non-zero. */ | |
3019eac3 DE |
587 | unsigned int is_debug_types : 1; |
588 | ||
36586728 TT |
589 | /* Non-zero if this CU is from the .dwz file. */ |
590 | unsigned int is_dwz : 1; | |
591 | ||
a2ce51a0 DE |
592 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
593 | This flag is only valid if is_debug_types is true. | |
594 | We can't read a CU directly from a DWO file: There are required | |
595 | attributes in the stub. */ | |
596 | unsigned int reading_dwo_directly : 1; | |
597 | ||
7ee85ab1 DE |
598 | /* Non-zero if the TU has been read. |
599 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
600 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
601 | fetching them from random other DWOs (due to comdat folding). | |
602 | If the TU has already been read, the optimization is unnecessary | |
603 | (and unwise - we don't want to change where gdb thinks the TU lives | |
604 | "midflight"). | |
605 | This flag is only valid if is_debug_types is true. */ | |
606 | unsigned int tu_read : 1; | |
607 | ||
3019eac3 DE |
608 | /* The section this CU/TU lives in. |
609 | If the DIE refers to a DWO file, this is always the original die, | |
610 | not the DWO file. */ | |
8a0459fd | 611 | struct dwarf2_section_info *section; |
348e048f | 612 | |
17ea53c3 | 613 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
cc12ce38 DE |
614 | of the CU cache it gets reset to NULL again. This is left as NULL for |
615 | dummy CUs (a CU header, but nothing else). */ | |
ae038cb0 | 616 | struct dwarf2_cu *cu; |
1c379e20 | 617 | |
9cdd5dbd DE |
618 | /* The corresponding objfile. |
619 | Normally we can get the objfile from dwarf2_per_objfile. | |
620 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
621 | struct objfile *objfile; |
622 | ||
fffbe6a8 YQ |
623 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
624 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
625 | union |
626 | { | |
627 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 628 | or NULL for unread partial units. */ |
9291a0cd TT |
629 | struct partial_symtab *psymtab; |
630 | ||
631 | /* Data needed by the "quick" functions. */ | |
632 | struct dwarf2_per_cu_quick_data *quick; | |
633 | } v; | |
95554aad | 634 | |
796a7ff8 DE |
635 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
636 | while reading psymtabs, used to compute the psymtab dependencies, | |
637 | and then cleared. Then it is filled in again while reading full | |
638 | symbols, and only deleted when the objfile is destroyed. | |
639 | ||
640 | This is also used to work around a difference between the way gold | |
641 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
642 | is a gold bug. For symbols coming from TUs, gold records in the index | |
643 | the CU that includes the TU instead of the TU itself. This breaks | |
644 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
645 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
646 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
647 | we need to look in TU Z to find X. Fortunately, this is akin to | |
648 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
649 | .gdb_index version <=7 this also records the TUs that the CU referred | |
650 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
651 | indices so we only pay a price for gold generated indices. |
652 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 653 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
654 | }; |
655 | ||
348e048f DE |
656 | /* Entry in the signatured_types hash table. */ |
657 | ||
658 | struct signatured_type | |
659 | { | |
42e7ad6c | 660 | /* The "per_cu" object of this type. |
ac9ec31b | 661 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
662 | N.B.: This is the first member so that it's easy to convert pointers |
663 | between them. */ | |
664 | struct dwarf2_per_cu_data per_cu; | |
665 | ||
3019eac3 | 666 | /* The type's signature. */ |
348e048f DE |
667 | ULONGEST signature; |
668 | ||
3019eac3 | 669 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
670 | If this TU is a DWO stub and the definition lives in a DWO file |
671 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
672 | cu_offset type_offset_in_tu; |
673 | ||
674 | /* Offset in the section of the type's DIE. | |
675 | If the definition lives in a DWO file, this is the offset in the | |
676 | .debug_types.dwo section. | |
677 | The value is zero until the actual value is known. | |
678 | Zero is otherwise not a valid section offset. */ | |
679 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
680 | |
681 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
682 | can share them. This points to the containing symtab. */ | |
683 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
684 | |
685 | /* The type. | |
686 | The first time we encounter this type we fully read it in and install it | |
687 | in the symbol tables. Subsequent times we only need the type. */ | |
688 | struct type *type; | |
a2ce51a0 DE |
689 | |
690 | /* Containing DWO unit. | |
691 | This field is valid iff per_cu.reading_dwo_directly. */ | |
692 | struct dwo_unit *dwo_unit; | |
348e048f DE |
693 | }; |
694 | ||
0186c6a7 DE |
695 | typedef struct signatured_type *sig_type_ptr; |
696 | DEF_VEC_P (sig_type_ptr); | |
697 | ||
094b34ac DE |
698 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
699 | This includes type_unit_group and quick_file_names. */ | |
700 | ||
701 | struct stmt_list_hash | |
702 | { | |
703 | /* The DWO unit this table is from or NULL if there is none. */ | |
704 | struct dwo_unit *dwo_unit; | |
705 | ||
706 | /* Offset in .debug_line or .debug_line.dwo. */ | |
707 | sect_offset line_offset; | |
708 | }; | |
709 | ||
f4dc4d17 DE |
710 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
711 | an object of this type. */ | |
712 | ||
713 | struct type_unit_group | |
714 | { | |
0186c6a7 | 715 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
716 | To simplify things we create an artificial CU that "includes" all the |
717 | type units using this stmt_list so that the rest of the code still has | |
718 | a "per_cu" handle on the symtab. | |
719 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 720 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
721 | struct dwarf2_per_cu_data per_cu; |
722 | ||
0186c6a7 DE |
723 | /* The TUs that share this DW_AT_stmt_list entry. |
724 | This is added to while parsing type units to build partial symtabs, | |
725 | and is deleted afterwards and not used again. */ | |
726 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 727 | |
43f3e411 | 728 | /* The compunit symtab. |
094b34ac | 729 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
730 | so we create an essentially anonymous symtab as the compunit symtab. */ |
731 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 732 | |
094b34ac DE |
733 | /* The data used to construct the hash key. */ |
734 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
735 | |
736 | /* The number of symtabs from the line header. | |
737 | The value here must match line_header.num_file_names. */ | |
738 | unsigned int num_symtabs; | |
739 | ||
740 | /* The symbol tables for this TU (obtained from the files listed in | |
741 | DW_AT_stmt_list). | |
742 | WARNING: The order of entries here must match the order of entries | |
743 | in the line header. After the first TU using this type_unit_group, the | |
744 | line header for the subsequent TUs is recreated from this. This is done | |
745 | because we need to use the same symtabs for each TU using the same | |
746 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
747 | there's no guarantee the line header doesn't have duplicate entries. */ | |
748 | struct symtab **symtabs; | |
749 | }; | |
750 | ||
73869dc2 | 751 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
752 | |
753 | struct dwo_sections | |
754 | { | |
755 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
756 | struct dwarf2_section_info line; |
757 | struct dwarf2_section_info loc; | |
09262596 DE |
758 | struct dwarf2_section_info macinfo; |
759 | struct dwarf2_section_info macro; | |
3019eac3 DE |
760 | struct dwarf2_section_info str; |
761 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
762 | /* In the case of a virtual DWO file, these two are unused. */ |
763 | struct dwarf2_section_info info; | |
3019eac3 DE |
764 | VEC (dwarf2_section_info_def) *types; |
765 | }; | |
766 | ||
c88ee1f0 | 767 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
768 | |
769 | struct dwo_unit | |
770 | { | |
771 | /* Backlink to the containing struct dwo_file. */ | |
772 | struct dwo_file *dwo_file; | |
773 | ||
774 | /* The "id" that distinguishes this CU/TU. | |
775 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
776 | Since signatures came first, we stick with it for consistency. */ | |
777 | ULONGEST signature; | |
778 | ||
779 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 780 | struct dwarf2_section_info *section; |
3019eac3 | 781 | |
19ac8c2e | 782 | /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */ |
3019eac3 DE |
783 | sect_offset offset; |
784 | unsigned int length; | |
785 | ||
786 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
787 | cu_offset type_offset_in_tu; | |
788 | }; | |
789 | ||
73869dc2 DE |
790 | /* include/dwarf2.h defines the DWP section codes. |
791 | It defines a max value but it doesn't define a min value, which we | |
792 | use for error checking, so provide one. */ | |
793 | ||
794 | enum dwp_v2_section_ids | |
795 | { | |
796 | DW_SECT_MIN = 1 | |
797 | }; | |
798 | ||
80626a55 | 799 | /* Data for one DWO file. |
57d63ce2 DE |
800 | |
801 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
802 | appears in a DWP file). DWP files don't really have DWO files per se - | |
803 | comdat folding of types "loses" the DWO file they came from, and from | |
804 | a high level view DWP files appear to contain a mass of random types. | |
805 | However, to maintain consistency with the non-DWP case we pretend DWP | |
806 | files contain virtual DWO files, and we assign each TU with one virtual | |
807 | DWO file (generally based on the line and abbrev section offsets - | |
808 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
809 | |
810 | struct dwo_file | |
811 | { | |
0ac5b59e | 812 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
813 | For virtual DWO files the name is constructed from the section offsets |
814 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
815 | from related CU+TUs. */ | |
0ac5b59e DE |
816 | const char *dwo_name; |
817 | ||
818 | /* The DW_AT_comp_dir attribute. */ | |
819 | const char *comp_dir; | |
3019eac3 | 820 | |
80626a55 DE |
821 | /* The bfd, when the file is open. Otherwise this is NULL. |
822 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
823 | bfd *dbfd; | |
3019eac3 | 824 | |
73869dc2 DE |
825 | /* The sections that make up this DWO file. |
826 | Remember that for virtual DWO files in DWP V2, these are virtual | |
827 | sections (for lack of a better name). */ | |
3019eac3 DE |
828 | struct dwo_sections sections; |
829 | ||
19c3d4c9 DE |
830 | /* The CU in the file. |
831 | We only support one because having more than one requires hacking the | |
832 | dwo_name of each to match, which is highly unlikely to happen. | |
833 | Doing this means all TUs can share comp_dir: We also assume that | |
834 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
835 | struct dwo_unit *cu; | |
3019eac3 DE |
836 | |
837 | /* Table of TUs in the file. | |
838 | Each element is a struct dwo_unit. */ | |
839 | htab_t tus; | |
840 | }; | |
841 | ||
80626a55 DE |
842 | /* These sections are what may appear in a DWP file. */ |
843 | ||
844 | struct dwp_sections | |
845 | { | |
73869dc2 | 846 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
847 | struct dwarf2_section_info str; |
848 | struct dwarf2_section_info cu_index; | |
849 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
850 | |
851 | /* These are only used by DWP version 2 files. | |
852 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
853 | sections are referenced by section number, and are not recorded here. | |
854 | In DWP version 2 there is at most one copy of all these sections, each | |
855 | section being (effectively) comprised of the concatenation of all of the | |
856 | individual sections that exist in the version 1 format. | |
857 | To keep the code simple we treat each of these concatenated pieces as a | |
858 | section itself (a virtual section?). */ | |
859 | struct dwarf2_section_info abbrev; | |
860 | struct dwarf2_section_info info; | |
861 | struct dwarf2_section_info line; | |
862 | struct dwarf2_section_info loc; | |
863 | struct dwarf2_section_info macinfo; | |
864 | struct dwarf2_section_info macro; | |
865 | struct dwarf2_section_info str_offsets; | |
866 | struct dwarf2_section_info types; | |
80626a55 DE |
867 | }; |
868 | ||
73869dc2 DE |
869 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
870 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 871 | |
73869dc2 | 872 | struct virtual_v1_dwo_sections |
80626a55 DE |
873 | { |
874 | struct dwarf2_section_info abbrev; | |
875 | struct dwarf2_section_info line; | |
876 | struct dwarf2_section_info loc; | |
877 | struct dwarf2_section_info macinfo; | |
878 | struct dwarf2_section_info macro; | |
879 | struct dwarf2_section_info str_offsets; | |
880 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 881 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
882 | struct dwarf2_section_info info_or_types; |
883 | }; | |
884 | ||
73869dc2 DE |
885 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
886 | In version 2, the sections of the DWO files are concatenated together | |
887 | and stored in one section of that name. Thus each ELF section contains | |
888 | several "virtual" sections. */ | |
889 | ||
890 | struct virtual_v2_dwo_sections | |
891 | { | |
892 | bfd_size_type abbrev_offset; | |
893 | bfd_size_type abbrev_size; | |
894 | ||
895 | bfd_size_type line_offset; | |
896 | bfd_size_type line_size; | |
897 | ||
898 | bfd_size_type loc_offset; | |
899 | bfd_size_type loc_size; | |
900 | ||
901 | bfd_size_type macinfo_offset; | |
902 | bfd_size_type macinfo_size; | |
903 | ||
904 | bfd_size_type macro_offset; | |
905 | bfd_size_type macro_size; | |
906 | ||
907 | bfd_size_type str_offsets_offset; | |
908 | bfd_size_type str_offsets_size; | |
909 | ||
910 | /* Each DWP hash table entry records one CU or one TU. | |
911 | That is recorded here, and copied to dwo_unit.section. */ | |
912 | bfd_size_type info_or_types_offset; | |
913 | bfd_size_type info_or_types_size; | |
914 | }; | |
915 | ||
80626a55 DE |
916 | /* Contents of DWP hash tables. */ |
917 | ||
918 | struct dwp_hash_table | |
919 | { | |
73869dc2 | 920 | uint32_t version, nr_columns; |
80626a55 | 921 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
922 | const gdb_byte *hash_table, *unit_table; |
923 | union | |
924 | { | |
925 | struct | |
926 | { | |
927 | const gdb_byte *indices; | |
928 | } v1; | |
929 | struct | |
930 | { | |
931 | /* This is indexed by column number and gives the id of the section | |
932 | in that column. */ | |
933 | #define MAX_NR_V2_DWO_SECTIONS \ | |
934 | (1 /* .debug_info or .debug_types */ \ | |
935 | + 1 /* .debug_abbrev */ \ | |
936 | + 1 /* .debug_line */ \ | |
937 | + 1 /* .debug_loc */ \ | |
938 | + 1 /* .debug_str_offsets */ \ | |
939 | + 1 /* .debug_macro or .debug_macinfo */) | |
940 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
941 | const gdb_byte *offsets; | |
942 | const gdb_byte *sizes; | |
943 | } v2; | |
944 | } section_pool; | |
80626a55 DE |
945 | }; |
946 | ||
947 | /* Data for one DWP file. */ | |
948 | ||
949 | struct dwp_file | |
950 | { | |
951 | /* Name of the file. */ | |
952 | const char *name; | |
953 | ||
73869dc2 DE |
954 | /* File format version. */ |
955 | int version; | |
956 | ||
93417882 | 957 | /* The bfd. */ |
80626a55 DE |
958 | bfd *dbfd; |
959 | ||
960 | /* Section info for this file. */ | |
961 | struct dwp_sections sections; | |
962 | ||
57d63ce2 | 963 | /* Table of CUs in the file. */ |
80626a55 DE |
964 | const struct dwp_hash_table *cus; |
965 | ||
966 | /* Table of TUs in the file. */ | |
967 | const struct dwp_hash_table *tus; | |
968 | ||
19ac8c2e DE |
969 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
970 | htab_t loaded_cus; | |
971 | htab_t loaded_tus; | |
80626a55 | 972 | |
73869dc2 DE |
973 | /* Table to map ELF section numbers to their sections. |
974 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
975 | unsigned int num_sections; |
976 | asection **elf_sections; | |
977 | }; | |
978 | ||
36586728 TT |
979 | /* This represents a '.dwz' file. */ |
980 | ||
981 | struct dwz_file | |
982 | { | |
983 | /* A dwz file can only contain a few sections. */ | |
984 | struct dwarf2_section_info abbrev; | |
985 | struct dwarf2_section_info info; | |
986 | struct dwarf2_section_info str; | |
987 | struct dwarf2_section_info line; | |
988 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 989 | struct dwarf2_section_info gdb_index; |
36586728 TT |
990 | |
991 | /* The dwz's BFD. */ | |
992 | bfd *dwz_bfd; | |
993 | }; | |
994 | ||
0963b4bd MS |
995 | /* Struct used to pass misc. parameters to read_die_and_children, et |
996 | al. which are used for both .debug_info and .debug_types dies. | |
997 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 998 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
999 | |
1000 | struct die_reader_specs | |
1001 | { | |
a32a8923 | 1002 | /* The bfd of die_section. */ |
93311388 DE |
1003 | bfd* abfd; |
1004 | ||
1005 | /* The CU of the DIE we are parsing. */ | |
1006 | struct dwarf2_cu *cu; | |
1007 | ||
80626a55 | 1008 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
1009 | struct dwo_file *dwo_file; |
1010 | ||
dee91e82 | 1011 | /* The section the die comes from. |
3019eac3 | 1012 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1013 | struct dwarf2_section_info *die_section; |
1014 | ||
1015 | /* die_section->buffer. */ | |
d521ce57 | 1016 | const gdb_byte *buffer; |
f664829e DE |
1017 | |
1018 | /* The end of the buffer. */ | |
1019 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1020 | |
1021 | /* The value of the DW_AT_comp_dir attribute. */ | |
1022 | const char *comp_dir; | |
93311388 DE |
1023 | }; |
1024 | ||
fd820528 | 1025 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1026 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1027 | const gdb_byte *info_ptr, |
dee91e82 DE |
1028 | struct die_info *comp_unit_die, |
1029 | int has_children, | |
1030 | void *data); | |
1031 | ||
52059ffd TT |
1032 | struct file_entry |
1033 | { | |
1034 | const char *name; | |
1035 | unsigned int dir_index; | |
1036 | unsigned int mod_time; | |
1037 | unsigned int length; | |
83769d0b DE |
1038 | /* Non-zero if referenced by the Line Number Program. */ |
1039 | int included_p; | |
1040 | /* The associated symbol table, if any. */ | |
1041 | struct symtab *symtab; | |
52059ffd TT |
1042 | }; |
1043 | ||
debd256d JB |
1044 | /* The line number information for a compilation unit (found in the |
1045 | .debug_line section) begins with a "statement program header", | |
1046 | which contains the following information. */ | |
1047 | struct line_header | |
1048 | { | |
527f3840 JK |
1049 | /* Offset of line number information in .debug_line section. */ |
1050 | sect_offset offset; | |
1051 | ||
1052 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
1053 | unsigned offset_in_dwz : 1; | |
1054 | ||
debd256d JB |
1055 | unsigned int total_length; |
1056 | unsigned short version; | |
1057 | unsigned int header_length; | |
1058 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 1059 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
1060 | unsigned char default_is_stmt; |
1061 | int line_base; | |
1062 | unsigned char line_range; | |
1063 | unsigned char opcode_base; | |
1064 | ||
1065 | /* standard_opcode_lengths[i] is the number of operands for the | |
1066 | standard opcode whose value is i. This means that | |
1067 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1068 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
1069 | unsigned char *standard_opcode_lengths; | |
1070 | ||
1071 | /* The include_directories table. NOTE! These strings are not | |
1072 | allocated with xmalloc; instead, they are pointers into | |
1073 | debug_line_buffer. If you try to free them, `free' will get | |
1074 | indigestion. */ | |
1075 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 1076 | const char **include_dirs; |
debd256d JB |
1077 | |
1078 | /* The file_names table. NOTE! These strings are not allocated | |
1079 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
1080 | Don't try to free them directly. */ | |
1081 | unsigned int num_file_names, file_names_size; | |
52059ffd | 1082 | struct file_entry *file_names; |
debd256d JB |
1083 | |
1084 | /* The start and end of the statement program following this | |
6502dd73 | 1085 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 1086 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 1087 | }; |
c906108c SS |
1088 | |
1089 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 1090 | need this much information. */ |
c906108c SS |
1091 | struct partial_die_info |
1092 | { | |
72bf9492 | 1093 | /* Offset of this DIE. */ |
b64f50a1 | 1094 | sect_offset offset; |
72bf9492 DJ |
1095 | |
1096 | /* DWARF-2 tag for this DIE. */ | |
1097 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1098 | ||
72bf9492 DJ |
1099 | /* Assorted flags describing the data found in this DIE. */ |
1100 | unsigned int has_children : 1; | |
1101 | unsigned int is_external : 1; | |
1102 | unsigned int is_declaration : 1; | |
1103 | unsigned int has_type : 1; | |
1104 | unsigned int has_specification : 1; | |
1105 | unsigned int has_pc_info : 1; | |
481860b3 | 1106 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
1107 | |
1108 | /* Flag set if the SCOPE field of this structure has been | |
1109 | computed. */ | |
1110 | unsigned int scope_set : 1; | |
1111 | ||
fa4028e9 JB |
1112 | /* Flag set if the DIE has a byte_size attribute. */ |
1113 | unsigned int has_byte_size : 1; | |
1114 | ||
ff908ebf AW |
1115 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1116 | unsigned int has_const_value : 1; | |
1117 | ||
98bfdba5 PA |
1118 | /* Flag set if any of the DIE's children are template arguments. */ |
1119 | unsigned int has_template_arguments : 1; | |
1120 | ||
abc72ce4 DE |
1121 | /* Flag set if fixup_partial_die has been called on this die. */ |
1122 | unsigned int fixup_called : 1; | |
1123 | ||
36586728 TT |
1124 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1125 | unsigned int is_dwz : 1; | |
1126 | ||
1127 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1128 | unsigned int spec_is_dwz : 1; | |
1129 | ||
72bf9492 | 1130 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1131 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1132 | const char *name; |
72bf9492 | 1133 | |
abc72ce4 DE |
1134 | /* The linkage name, if present. */ |
1135 | const char *linkage_name; | |
1136 | ||
72bf9492 DJ |
1137 | /* The scope to prepend to our children. This is generally |
1138 | allocated on the comp_unit_obstack, so will disappear | |
1139 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1140 | const char *scope; |
72bf9492 | 1141 | |
95554aad TT |
1142 | /* Some data associated with the partial DIE. The tag determines |
1143 | which field is live. */ | |
1144 | union | |
1145 | { | |
1146 | /* The location description associated with this DIE, if any. */ | |
1147 | struct dwarf_block *locdesc; | |
1148 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1149 | sect_offset offset; | |
1150 | } d; | |
72bf9492 DJ |
1151 | |
1152 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1153 | CORE_ADDR lowpc; |
1154 | CORE_ADDR highpc; | |
72bf9492 | 1155 | |
93311388 | 1156 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1157 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1158 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1159 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1160 | const gdb_byte *sibling; |
72bf9492 DJ |
1161 | |
1162 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1163 | DW_AT_specification (or DW_AT_abstract_origin or | |
1164 | DW_AT_extension). */ | |
b64f50a1 | 1165 | sect_offset spec_offset; |
72bf9492 DJ |
1166 | |
1167 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1168 | if any. */ | |
1169 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1170 | }; |
1171 | ||
0963b4bd | 1172 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1173 | struct abbrev_info |
1174 | { | |
1175 | unsigned int number; /* number identifying abbrev */ | |
1176 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1177 | unsigned short has_children; /* boolean */ |
1178 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1179 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1180 | struct abbrev_info *next; /* next in chain */ | |
1181 | }; | |
1182 | ||
1183 | struct attr_abbrev | |
1184 | { | |
9d25dd43 DE |
1185 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1186 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1187 | }; |
1188 | ||
433df2d4 DE |
1189 | /* Size of abbrev_table.abbrev_hash_table. */ |
1190 | #define ABBREV_HASH_SIZE 121 | |
1191 | ||
1192 | /* Top level data structure to contain an abbreviation table. */ | |
1193 | ||
1194 | struct abbrev_table | |
1195 | { | |
f4dc4d17 DE |
1196 | /* Where the abbrev table came from. |
1197 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1198 | sect_offset offset; |
1199 | ||
1200 | /* Storage for the abbrev table. */ | |
1201 | struct obstack abbrev_obstack; | |
1202 | ||
1203 | /* Hash table of abbrevs. | |
1204 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1205 | It could be statically allocated, but the previous code didn't so we | |
1206 | don't either. */ | |
1207 | struct abbrev_info **abbrevs; | |
1208 | }; | |
1209 | ||
0963b4bd | 1210 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1211 | struct attribute |
1212 | { | |
9d25dd43 | 1213 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1214 | ENUM_BITFIELD(dwarf_form) form : 15; |
1215 | ||
1216 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1217 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1218 | here for better struct attribute alignment. */ | |
1219 | unsigned int string_is_canonical : 1; | |
1220 | ||
b60c80d6 DJ |
1221 | union |
1222 | { | |
15d034d0 | 1223 | const char *str; |
b60c80d6 | 1224 | struct dwarf_block *blk; |
43bbcdc2 PH |
1225 | ULONGEST unsnd; |
1226 | LONGEST snd; | |
b60c80d6 | 1227 | CORE_ADDR addr; |
ac9ec31b | 1228 | ULONGEST signature; |
b60c80d6 DJ |
1229 | } |
1230 | u; | |
1231 | }; | |
1232 | ||
0963b4bd | 1233 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1234 | struct die_info |
1235 | { | |
76815b17 DE |
1236 | /* DWARF-2 tag for this DIE. */ |
1237 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1238 | ||
1239 | /* Number of attributes */ | |
98bfdba5 PA |
1240 | unsigned char num_attrs; |
1241 | ||
1242 | /* True if we're presently building the full type name for the | |
1243 | type derived from this DIE. */ | |
1244 | unsigned char building_fullname : 1; | |
76815b17 | 1245 | |
adde2bff DE |
1246 | /* True if this die is in process. PR 16581. */ |
1247 | unsigned char in_process : 1; | |
1248 | ||
76815b17 DE |
1249 | /* Abbrev number */ |
1250 | unsigned int abbrev; | |
1251 | ||
93311388 | 1252 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1253 | sect_offset offset; |
78ba4af6 JB |
1254 | |
1255 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1256 | points to this die's parent; CHILD points to the first child of | |
1257 | this node; and all the children of a given node are chained | |
4950bc1c | 1258 | together via their SIBLING fields. */ |
639d11d3 DC |
1259 | struct die_info *child; /* Its first child, if any. */ |
1260 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1261 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1262 | |
b60c80d6 DJ |
1263 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1264 | zero, but it's not common and zero-sized arrays are not | |
1265 | sufficiently portable C. */ | |
1266 | struct attribute attrs[1]; | |
c906108c SS |
1267 | }; |
1268 | ||
0963b4bd | 1269 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1270 | |
1271 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1272 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1273 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1274 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1275 | #define DW_SND(attr) ((attr)->u.snd) | |
1276 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1277 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1278 | |
0963b4bd | 1279 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1280 | struct dwarf_block |
1281 | { | |
56eb65bd | 1282 | size_t size; |
1d6edc3c JK |
1283 | |
1284 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1285 | const gdb_byte *data; |
c906108c SS |
1286 | }; |
1287 | ||
c906108c SS |
1288 | #ifndef ATTR_ALLOC_CHUNK |
1289 | #define ATTR_ALLOC_CHUNK 4 | |
1290 | #endif | |
1291 | ||
c906108c SS |
1292 | /* Allocate fields for structs, unions and enums in this size. */ |
1293 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1294 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1295 | #endif | |
1296 | ||
c906108c SS |
1297 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1298 | but this would require a corresponding change in unpack_field_as_long | |
1299 | and friends. */ | |
1300 | static int bits_per_byte = 8; | |
1301 | ||
52059ffd TT |
1302 | struct nextfield |
1303 | { | |
1304 | struct nextfield *next; | |
1305 | int accessibility; | |
1306 | int virtuality; | |
1307 | struct field field; | |
1308 | }; | |
1309 | ||
1310 | struct nextfnfield | |
1311 | { | |
1312 | struct nextfnfield *next; | |
1313 | struct fn_field fnfield; | |
1314 | }; | |
1315 | ||
1316 | struct fnfieldlist | |
1317 | { | |
1318 | const char *name; | |
1319 | int length; | |
1320 | struct nextfnfield *head; | |
1321 | }; | |
1322 | ||
1323 | struct typedef_field_list | |
1324 | { | |
1325 | struct typedef_field field; | |
1326 | struct typedef_field_list *next; | |
1327 | }; | |
1328 | ||
c906108c SS |
1329 | /* The routines that read and process dies for a C struct or C++ class |
1330 | pass lists of data member fields and lists of member function fields | |
1331 | in an instance of a field_info structure, as defined below. */ | |
1332 | struct field_info | |
c5aa993b | 1333 | { |
0963b4bd | 1334 | /* List of data member and baseclasses fields. */ |
52059ffd | 1335 | struct nextfield *fields, *baseclasses; |
c906108c | 1336 | |
7d0ccb61 | 1337 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1338 | int nfields; |
c906108c | 1339 | |
c5aa993b JM |
1340 | /* Number of baseclasses. */ |
1341 | int nbaseclasses; | |
c906108c | 1342 | |
c5aa993b JM |
1343 | /* Set if the accesibility of one of the fields is not public. */ |
1344 | int non_public_fields; | |
c906108c | 1345 | |
c5aa993b JM |
1346 | /* Member function fields array, entries are allocated in the order they |
1347 | are encountered in the object file. */ | |
52059ffd | 1348 | struct nextfnfield *fnfields; |
c906108c | 1349 | |
c5aa993b JM |
1350 | /* Member function fieldlist array, contains name of possibly overloaded |
1351 | member function, number of overloaded member functions and a pointer | |
1352 | to the head of the member function field chain. */ | |
52059ffd | 1353 | struct fnfieldlist *fnfieldlists; |
c906108c | 1354 | |
c5aa993b JM |
1355 | /* Number of entries in the fnfieldlists array. */ |
1356 | int nfnfields; | |
98751a41 JK |
1357 | |
1358 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1359 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
52059ffd | 1360 | struct typedef_field_list *typedef_field_list; |
98751a41 | 1361 | unsigned typedef_field_list_count; |
c5aa993b | 1362 | }; |
c906108c | 1363 | |
10b3939b DJ |
1364 | /* One item on the queue of compilation units to read in full symbols |
1365 | for. */ | |
1366 | struct dwarf2_queue_item | |
1367 | { | |
1368 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1369 | enum language pretend_language; |
10b3939b DJ |
1370 | struct dwarf2_queue_item *next; |
1371 | }; | |
1372 | ||
1373 | /* The current queue. */ | |
1374 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1375 | ||
ae038cb0 DJ |
1376 | /* Loaded secondary compilation units are kept in memory until they |
1377 | have not been referenced for the processing of this many | |
1378 | compilation units. Set this to zero to disable caching. Cache | |
1379 | sizes of up to at least twenty will improve startup time for | |
1380 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1381 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1382 | static void |
b4f54984 DE |
1383 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1384 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1385 | { |
3e43a32a | 1386 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1387 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1388 | value); |
1389 | } | |
4390d890 | 1390 | \f |
c906108c SS |
1391 | /* local function prototypes */ |
1392 | ||
a32a8923 DE |
1393 | static const char *get_section_name (const struct dwarf2_section_info *); |
1394 | ||
1395 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1396 | ||
4efb68b1 | 1397 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1398 | |
918dd910 JK |
1399 | static void dwarf2_find_base_address (struct die_info *die, |
1400 | struct dwarf2_cu *cu); | |
1401 | ||
0018ea6f DE |
1402 | static struct partial_symtab *create_partial_symtab |
1403 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1404 | ||
c67a9c90 | 1405 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1406 | |
72bf9492 DJ |
1407 | static void scan_partial_symbols (struct partial_die_info *, |
1408 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1409 | int, struct dwarf2_cu *); |
c906108c | 1410 | |
72bf9492 DJ |
1411 | static void add_partial_symbol (struct partial_die_info *, |
1412 | struct dwarf2_cu *); | |
63d06c5c | 1413 | |
72bf9492 DJ |
1414 | static void add_partial_namespace (struct partial_die_info *pdi, |
1415 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1416 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1417 | |
5d7cb8df | 1418 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1419 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1420 | struct dwarf2_cu *cu); |
1421 | ||
72bf9492 DJ |
1422 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1423 | struct dwarf2_cu *cu); | |
91c24f0a | 1424 | |
bc30ff58 JB |
1425 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1426 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1427 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1428 | |
257e7a09 YQ |
1429 | static void dwarf2_read_symtab (struct partial_symtab *, |
1430 | struct objfile *); | |
c906108c | 1431 | |
a14ed312 | 1432 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1433 | |
433df2d4 DE |
1434 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1435 | (const struct abbrev_table *, unsigned int); | |
1436 | ||
1437 | static struct abbrev_table *abbrev_table_read_table | |
1438 | (struct dwarf2_section_info *, sect_offset); | |
1439 | ||
1440 | static void abbrev_table_free (struct abbrev_table *); | |
1441 | ||
f4dc4d17 DE |
1442 | static void abbrev_table_free_cleanup (void *); |
1443 | ||
dee91e82 DE |
1444 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1445 | struct dwarf2_section_info *); | |
c906108c | 1446 | |
f3dd6933 | 1447 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1448 | |
d521ce57 | 1449 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1450 | |
dee91e82 | 1451 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1452 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1453 | |
d521ce57 TT |
1454 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1455 | struct partial_die_info *, | |
1456 | struct abbrev_info *, | |
1457 | unsigned int, | |
1458 | const gdb_byte *); | |
c906108c | 1459 | |
36586728 | 1460 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1461 | struct dwarf2_cu *); |
72bf9492 DJ |
1462 | |
1463 | static void fixup_partial_die (struct partial_die_info *, | |
1464 | struct dwarf2_cu *); | |
1465 | ||
d521ce57 TT |
1466 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1467 | struct attribute *, struct attr_abbrev *, | |
1468 | const gdb_byte *); | |
a8329558 | 1469 | |
a1855c1d | 1470 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1471 | |
a1855c1d | 1472 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1473 | |
a1855c1d | 1474 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1475 | |
a1855c1d | 1476 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1477 | |
a1855c1d | 1478 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1479 | |
d521ce57 | 1480 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1481 | unsigned int *); |
c906108c | 1482 | |
d521ce57 | 1483 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1484 | |
1485 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1486 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1487 | unsigned int *, unsigned int *); |
613e1657 | 1488 | |
d521ce57 TT |
1489 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1490 | const struct comp_unit_head *, | |
c764a876 DE |
1491 | unsigned int *); |
1492 | ||
d521ce57 | 1493 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1494 | |
f4dc4d17 DE |
1495 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1496 | sect_offset); | |
1497 | ||
d521ce57 | 1498 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1499 | |
d521ce57 | 1500 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1501 | |
d521ce57 TT |
1502 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1503 | const struct comp_unit_head *, | |
1504 | unsigned int *); | |
4bdf3d34 | 1505 | |
d521ce57 | 1506 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1507 | |
d521ce57 | 1508 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1509 | |
d521ce57 | 1510 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1511 | |
d521ce57 TT |
1512 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1513 | const gdb_byte *, | |
3019eac3 DE |
1514 | unsigned int *); |
1515 | ||
d521ce57 | 1516 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1517 | ULONGEST str_index); |
3019eac3 | 1518 | |
e142c38c | 1519 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1520 | |
e142c38c DJ |
1521 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1522 | struct dwarf2_cu *); | |
c906108c | 1523 | |
348e048f | 1524 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1525 | unsigned int); |
348e048f | 1526 | |
7d45c7c3 KB |
1527 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1528 | struct dwarf2_cu *cu); | |
1529 | ||
05cf31d1 JB |
1530 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1531 | struct dwarf2_cu *cu); | |
1532 | ||
e142c38c | 1533 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1534 | |
e142c38c | 1535 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1536 | struct dwarf2_cu **); |
63d06c5c | 1537 | |
debd256d JB |
1538 | static void free_line_header (struct line_header *lh); |
1539 | ||
3019eac3 DE |
1540 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1541 | struct dwarf2_cu *cu); | |
debd256d | 1542 | |
f3f5162e | 1543 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1544 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1545 | CORE_ADDR, int decode_mapping); |
c906108c | 1546 | |
4d663531 | 1547 | static void dwarf2_start_subfile (const char *, const char *); |
c906108c | 1548 | |
43f3e411 DE |
1549 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
1550 | const char *, const char *, | |
1551 | CORE_ADDR); | |
f4dc4d17 | 1552 | |
a14ed312 | 1553 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1554 | struct dwarf2_cu *); |
c906108c | 1555 | |
34eaf542 TT |
1556 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1557 | struct dwarf2_cu *, struct symbol *); | |
1558 | ||
ff39bb5e | 1559 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1560 | struct dwarf2_cu *); |
c906108c | 1561 | |
ff39bb5e | 1562 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1563 | struct type *type, |
1564 | const char *name, | |
1565 | struct obstack *obstack, | |
12df843f | 1566 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1567 | const gdb_byte **bytes, |
98bfdba5 | 1568 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1569 | |
e7c27a73 | 1570 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1571 | |
b4ba55a1 JB |
1572 | static int need_gnat_info (struct dwarf2_cu *); |
1573 | ||
3e43a32a MS |
1574 | static struct type *die_descriptive_type (struct die_info *, |
1575 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1576 | |
1577 | static void set_descriptive_type (struct type *, struct die_info *, | |
1578 | struct dwarf2_cu *); | |
1579 | ||
e7c27a73 DJ |
1580 | static struct type *die_containing_type (struct die_info *, |
1581 | struct dwarf2_cu *); | |
c906108c | 1582 | |
ff39bb5e | 1583 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1584 | struct dwarf2_cu *); |
c906108c | 1585 | |
f792889a | 1586 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1587 | |
673bfd45 DE |
1588 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1589 | ||
0d5cff50 | 1590 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1591 | |
6e70227d | 1592 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1593 | const char *suffix, int physname, |
1594 | struct dwarf2_cu *cu); | |
63d06c5c | 1595 | |
e7c27a73 | 1596 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1597 | |
348e048f DE |
1598 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1599 | ||
e7c27a73 | 1600 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1601 | |
e7c27a73 | 1602 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1603 | |
96408a79 SA |
1604 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1605 | ||
ff013f42 JK |
1606 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1607 | struct dwarf2_cu *, struct partial_symtab *); | |
1608 | ||
3a2b436a | 1609 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1610 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1611 | enum pc_bounds_kind |
1612 | { | |
e385593e | 1613 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1614 | PC_BOUNDS_NOT_PRESENT, |
1615 | ||
e385593e JK |
1616 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1617 | were present but they do not form a valid range of PC addresses. */ | |
1618 | PC_BOUNDS_INVALID, | |
1619 | ||
3a2b436a JK |
1620 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1621 | PC_BOUNDS_RANGES, | |
1622 | ||
1623 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1624 | PC_BOUNDS_HIGH_LOW, | |
1625 | }; | |
1626 | ||
1627 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1628 | CORE_ADDR *, CORE_ADDR *, | |
1629 | struct dwarf2_cu *, | |
1630 | struct partial_symtab *); | |
c906108c | 1631 | |
fae299cd DC |
1632 | static void get_scope_pc_bounds (struct die_info *, |
1633 | CORE_ADDR *, CORE_ADDR *, | |
1634 | struct dwarf2_cu *); | |
1635 | ||
801e3a5b JB |
1636 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1637 | CORE_ADDR, struct dwarf2_cu *); | |
1638 | ||
a14ed312 | 1639 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1640 | struct dwarf2_cu *); |
c906108c | 1641 | |
a14ed312 | 1642 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1643 | struct type *, struct dwarf2_cu *); |
c906108c | 1644 | |
a14ed312 | 1645 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1646 | struct die_info *, struct type *, |
e7c27a73 | 1647 | struct dwarf2_cu *); |
c906108c | 1648 | |
a14ed312 | 1649 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1650 | struct type *, |
1651 | struct dwarf2_cu *); | |
c906108c | 1652 | |
134d01f1 | 1653 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1654 | |
e7c27a73 | 1655 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1656 | |
e7c27a73 | 1657 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1658 | |
5d7cb8df JK |
1659 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1660 | ||
22cee43f PMR |
1661 | static struct using_direct **using_directives (enum language); |
1662 | ||
27aa8d6a SW |
1663 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1664 | ||
74921315 KS |
1665 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1666 | ||
f55ee35c JK |
1667 | static struct type *read_module_type (struct die_info *die, |
1668 | struct dwarf2_cu *cu); | |
1669 | ||
38d518c9 | 1670 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1671 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1672 | |
134d01f1 | 1673 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1674 | |
e7c27a73 | 1675 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1676 | |
6e70227d | 1677 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1678 | struct dwarf2_cu *); |
1679 | ||
bf6af496 | 1680 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1681 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1682 | struct die_info *); |
639d11d3 | 1683 | |
dee91e82 | 1684 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1685 | const gdb_byte *info_ptr, |
1686 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1687 | struct die_info *parent); |
1688 | ||
d521ce57 TT |
1689 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1690 | struct die_info **, const gdb_byte *, | |
1691 | int *, int); | |
3019eac3 | 1692 | |
d521ce57 TT |
1693 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1694 | struct die_info **, const gdb_byte *, | |
1695 | int *); | |
93311388 | 1696 | |
e7c27a73 | 1697 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1698 | |
15d034d0 TT |
1699 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1700 | struct obstack *); | |
71c25dea | 1701 | |
15d034d0 | 1702 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1703 | |
15d034d0 | 1704 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1705 | struct die_info *die, |
1706 | struct dwarf2_cu *cu); | |
1707 | ||
ca69b9e6 DE |
1708 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1709 | struct dwarf2_cu *cu); | |
1710 | ||
e142c38c | 1711 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1712 | struct dwarf2_cu **); |
9219021c | 1713 | |
f39c6ffd | 1714 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1715 | |
f39c6ffd | 1716 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1717 | |
f39c6ffd | 1718 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1719 | |
a14ed312 | 1720 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1721 | |
f39c6ffd | 1722 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1723 | |
f9aca02d | 1724 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1725 | |
d97bc12b DE |
1726 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1727 | ||
1728 | static void dump_die_for_error (struct die_info *); | |
1729 | ||
1730 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1731 | struct die_info *); | |
c906108c | 1732 | |
d97bc12b | 1733 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1734 | |
51545339 | 1735 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1736 | struct dwarf2_cu *); |
c906108c | 1737 | |
ff39bb5e | 1738 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1739 | |
ff39bb5e | 1740 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1741 | |
348e048f | 1742 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1743 | const struct attribute *, |
348e048f DE |
1744 | struct dwarf2_cu **); |
1745 | ||
10b3939b | 1746 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1747 | const struct attribute *, |
f2f0e013 | 1748 | struct dwarf2_cu **); |
c906108c | 1749 | |
348e048f | 1750 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1751 | const struct attribute *, |
348e048f DE |
1752 | struct dwarf2_cu **); |
1753 | ||
ac9ec31b DE |
1754 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1755 | struct dwarf2_cu *); | |
1756 | ||
1757 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1758 | const struct attribute *, |
ac9ec31b DE |
1759 | struct dwarf2_cu *); |
1760 | ||
e5fe5e75 | 1761 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1762 | |
52dc124a | 1763 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1764 | |
63e43d3a PMR |
1765 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1766 | struct die_info *die, struct dwarf2_cu *cu, | |
1767 | struct dynamic_prop *prop); | |
1768 | ||
c906108c SS |
1769 | /* memory allocation interface */ |
1770 | ||
7b5a2f43 | 1771 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1772 | |
b60c80d6 | 1773 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1774 | |
43f3e411 | 1775 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1776 | |
6e5a29e1 | 1777 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1778 | |
6e5a29e1 | 1779 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1780 | |
6e5a29e1 | 1781 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1782 | |
6e5a29e1 | 1783 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1784 | |
8cf6f0b1 TT |
1785 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1786 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1787 | const struct attribute *attr); |
8cf6f0b1 | 1788 | |
ff39bb5e | 1789 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1790 | struct symbol *sym, |
f1e6e072 TT |
1791 | struct dwarf2_cu *cu, |
1792 | int is_block); | |
4c2df51b | 1793 | |
d521ce57 TT |
1794 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1795 | const gdb_byte *info_ptr, | |
1796 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1797 | |
72bf9492 DJ |
1798 | static void free_stack_comp_unit (void *); |
1799 | ||
72bf9492 DJ |
1800 | static hashval_t partial_die_hash (const void *item); |
1801 | ||
1802 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1803 | ||
ae038cb0 | 1804 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1805 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1806 | |
9816fde3 | 1807 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1808 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1809 | |
1810 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1811 | struct die_info *comp_unit_die, |
1812 | enum language pretend_language); | |
93311388 | 1813 | |
68dc6402 | 1814 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1815 | |
1816 | static void free_cached_comp_units (void *); | |
1817 | ||
1818 | static void age_cached_comp_units (void); | |
1819 | ||
dee91e82 | 1820 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1821 | |
f792889a DJ |
1822 | static struct type *set_die_type (struct die_info *, struct type *, |
1823 | struct dwarf2_cu *); | |
1c379e20 | 1824 | |
ae038cb0 DJ |
1825 | static void create_all_comp_units (struct objfile *); |
1826 | ||
0e50663e | 1827 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1828 | |
95554aad TT |
1829 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1830 | enum language); | |
10b3939b | 1831 | |
95554aad TT |
1832 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1833 | enum language); | |
10b3939b | 1834 | |
f4dc4d17 DE |
1835 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1836 | enum language); | |
1837 | ||
10b3939b DJ |
1838 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1839 | struct dwarf2_per_cu_data *); | |
1840 | ||
ae038cb0 DJ |
1841 | static void dwarf2_mark (struct dwarf2_cu *); |
1842 | ||
1843 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1844 | ||
b64f50a1 | 1845 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1846 | struct dwarf2_per_cu_data *); |
673bfd45 | 1847 | |
f792889a | 1848 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1849 | |
9291a0cd TT |
1850 | static void dwarf2_release_queue (void *dummy); |
1851 | ||
95554aad TT |
1852 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1853 | enum language pretend_language); | |
1854 | ||
a0f42c21 | 1855 | static void process_queue (void); |
9291a0cd TT |
1856 | |
1857 | static void find_file_and_directory (struct die_info *die, | |
1858 | struct dwarf2_cu *cu, | |
15d034d0 | 1859 | const char **name, const char **comp_dir); |
9291a0cd TT |
1860 | |
1861 | static char *file_full_name (int file, struct line_header *lh, | |
1862 | const char *comp_dir); | |
1863 | ||
d521ce57 | 1864 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1865 | (struct comp_unit_head *header, |
1866 | struct dwarf2_section_info *section, | |
d521ce57 | 1867 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1868 | int is_debug_types_section); |
1869 | ||
fd820528 | 1870 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1871 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1872 | int use_existing_cu, int keep, | |
3019eac3 DE |
1873 | die_reader_func_ftype *die_reader_func, void *data); |
1874 | ||
dee91e82 DE |
1875 | static void init_cutu_and_read_dies_simple |
1876 | (struct dwarf2_per_cu_data *this_cu, | |
1877 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1878 | |
673bfd45 | 1879 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1880 | |
3019eac3 DE |
1881 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1882 | ||
57d63ce2 DE |
1883 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1884 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1885 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1886 | |
1887 | static struct dwp_file *get_dwp_file (void); | |
1888 | ||
3019eac3 | 1889 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1890 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1891 | |
1892 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1893 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1894 | |
89e63ee4 DE |
1895 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1896 | ||
3019eac3 DE |
1897 | static void free_dwo_file_cleanup (void *); |
1898 | ||
95554aad TT |
1899 | static void process_cu_includes (void); |
1900 | ||
1b80a9fa | 1901 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1902 | |
1903 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1904 | \f |
1905 | /* Various complaints about symbol reading that don't abort the process. */ | |
1906 | ||
1907 | static void | |
1908 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1909 | { | |
1910 | complaint (&symfile_complaints, | |
1911 | _("statement list doesn't fit in .debug_line section")); | |
1912 | } | |
1913 | ||
1914 | static void | |
1915 | dwarf2_debug_line_missing_file_complaint (void) | |
1916 | { | |
1917 | complaint (&symfile_complaints, | |
1918 | _(".debug_line section has line data without a file")); | |
1919 | } | |
1920 | ||
1921 | static void | |
1922 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1923 | { | |
1924 | complaint (&symfile_complaints, | |
1925 | _(".debug_line section has line " | |
1926 | "program sequence without an end")); | |
1927 | } | |
1928 | ||
1929 | static void | |
1930 | dwarf2_complex_location_expr_complaint (void) | |
1931 | { | |
1932 | complaint (&symfile_complaints, _("location expression too complex")); | |
1933 | } | |
1934 | ||
1935 | static void | |
1936 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1937 | int arg3) | |
1938 | { | |
1939 | complaint (&symfile_complaints, | |
1940 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1941 | arg1, arg2, arg3); | |
1942 | } | |
1943 | ||
1944 | static void | |
1945 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1946 | { | |
1947 | complaint (&symfile_complaints, | |
1948 | _("debug info runs off end of %s section" | |
1949 | " [in module %s]"), | |
a32a8923 DE |
1950 | get_section_name (section), |
1951 | get_section_file_name (section)); | |
4390d890 | 1952 | } |
1b80a9fa | 1953 | |
4390d890 DE |
1954 | static void |
1955 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1956 | { | |
1957 | complaint (&symfile_complaints, | |
1958 | _("macro debug info contains a " | |
1959 | "malformed macro definition:\n`%s'"), | |
1960 | arg1); | |
1961 | } | |
1962 | ||
1963 | static void | |
1964 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1965 | { | |
1966 | complaint (&symfile_complaints, | |
1967 | _("invalid attribute class or form for '%s' in '%s'"), | |
1968 | arg1, arg2); | |
1969 | } | |
527f3840 JK |
1970 | |
1971 | /* Hash function for line_header_hash. */ | |
1972 | ||
1973 | static hashval_t | |
1974 | line_header_hash (const struct line_header *ofs) | |
1975 | { | |
1976 | return ofs->offset.sect_off ^ ofs->offset_in_dwz; | |
1977 | } | |
1978 | ||
1979 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1980 | ||
1981 | static hashval_t | |
1982 | line_header_hash_voidp (const void *item) | |
1983 | { | |
9a3c8263 | 1984 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1985 | |
1986 | return line_header_hash (ofs); | |
1987 | } | |
1988 | ||
1989 | /* Equality function for line_header_hash. */ | |
1990 | ||
1991 | static int | |
1992 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1993 | { | |
9a3c8263 SM |
1994 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1995 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 JK |
1996 | |
1997 | return (ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off | |
1998 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); | |
1999 | } | |
2000 | ||
4390d890 | 2001 | \f |
9291a0cd TT |
2002 | #if WORDS_BIGENDIAN |
2003 | ||
2004 | /* Convert VALUE between big- and little-endian. */ | |
2005 | static offset_type | |
2006 | byte_swap (offset_type value) | |
2007 | { | |
2008 | offset_type result; | |
2009 | ||
2010 | result = (value & 0xff) << 24; | |
2011 | result |= (value & 0xff00) << 8; | |
2012 | result |= (value & 0xff0000) >> 8; | |
2013 | result |= (value & 0xff000000) >> 24; | |
2014 | return result; | |
2015 | } | |
2016 | ||
2017 | #define MAYBE_SWAP(V) byte_swap (V) | |
2018 | ||
2019 | #else | |
2020 | #define MAYBE_SWAP(V) (V) | |
2021 | #endif /* WORDS_BIGENDIAN */ | |
2022 | ||
31aa7e4e JB |
2023 | /* Read the given attribute value as an address, taking the attribute's |
2024 | form into account. */ | |
2025 | ||
2026 | static CORE_ADDR | |
2027 | attr_value_as_address (struct attribute *attr) | |
2028 | { | |
2029 | CORE_ADDR addr; | |
2030 | ||
2031 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
2032 | { | |
2033 | /* Aside from a few clearly defined exceptions, attributes that | |
2034 | contain an address must always be in DW_FORM_addr form. | |
2035 | Unfortunately, some compilers happen to be violating this | |
2036 | requirement by encoding addresses using other forms, such | |
2037 | as DW_FORM_data4 for example. For those broken compilers, | |
2038 | we try to do our best, without any guarantee of success, | |
2039 | to interpret the address correctly. It would also be nice | |
2040 | to generate a complaint, but that would require us to maintain | |
2041 | a list of legitimate cases where a non-address form is allowed, | |
2042 | as well as update callers to pass in at least the CU's DWARF | |
2043 | version. This is more overhead than what we're willing to | |
2044 | expand for a pretty rare case. */ | |
2045 | addr = DW_UNSND (attr); | |
2046 | } | |
2047 | else | |
2048 | addr = DW_ADDR (attr); | |
2049 | ||
2050 | return addr; | |
2051 | } | |
2052 | ||
9291a0cd TT |
2053 | /* The suffix for an index file. */ |
2054 | #define INDEX_SUFFIX ".gdb-index" | |
2055 | ||
c906108c | 2056 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2057 | information and return true if we have enough to do something. |
2058 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2059 | ELF names are used. */ | |
c906108c SS |
2060 | |
2061 | int | |
251d32d9 TG |
2062 | dwarf2_has_info (struct objfile *objfile, |
2063 | const struct dwarf2_debug_sections *names) | |
c906108c | 2064 | { |
9a3c8263 SM |
2065 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
2066 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
be391dca TT |
2067 | if (!dwarf2_per_objfile) |
2068 | { | |
2069 | /* Initialize per-objfile state. */ | |
2070 | struct dwarf2_per_objfile *data | |
8d749320 | 2071 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
9a619af0 | 2072 | |
be391dca TT |
2073 | memset (data, 0, sizeof (*data)); |
2074 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
2075 | dwarf2_per_objfile = data; | |
6502dd73 | 2076 | |
251d32d9 TG |
2077 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
2078 | (void *) names); | |
be391dca TT |
2079 | dwarf2_per_objfile->objfile = objfile; |
2080 | } | |
73869dc2 | 2081 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2082 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2083 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2084 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2085 | } |
2086 | ||
2087 | /* Return the containing section of virtual section SECTION. */ | |
2088 | ||
2089 | static struct dwarf2_section_info * | |
2090 | get_containing_section (const struct dwarf2_section_info *section) | |
2091 | { | |
2092 | gdb_assert (section->is_virtual); | |
2093 | return section->s.containing_section; | |
c906108c SS |
2094 | } |
2095 | ||
a32a8923 DE |
2096 | /* Return the bfd owner of SECTION. */ |
2097 | ||
2098 | static struct bfd * | |
2099 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2100 | { | |
73869dc2 DE |
2101 | if (section->is_virtual) |
2102 | { | |
2103 | section = get_containing_section (section); | |
2104 | gdb_assert (!section->is_virtual); | |
2105 | } | |
049412e3 | 2106 | return section->s.section->owner; |
a32a8923 DE |
2107 | } |
2108 | ||
2109 | /* Return the bfd section of SECTION. | |
2110 | Returns NULL if the section is not present. */ | |
2111 | ||
2112 | static asection * | |
2113 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2114 | { | |
73869dc2 DE |
2115 | if (section->is_virtual) |
2116 | { | |
2117 | section = get_containing_section (section); | |
2118 | gdb_assert (!section->is_virtual); | |
2119 | } | |
049412e3 | 2120 | return section->s.section; |
a32a8923 DE |
2121 | } |
2122 | ||
2123 | /* Return the name of SECTION. */ | |
2124 | ||
2125 | static const char * | |
2126 | get_section_name (const struct dwarf2_section_info *section) | |
2127 | { | |
2128 | asection *sectp = get_section_bfd_section (section); | |
2129 | ||
2130 | gdb_assert (sectp != NULL); | |
2131 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2132 | } | |
2133 | ||
2134 | /* Return the name of the file SECTION is in. */ | |
2135 | ||
2136 | static const char * | |
2137 | get_section_file_name (const struct dwarf2_section_info *section) | |
2138 | { | |
2139 | bfd *abfd = get_section_bfd_owner (section); | |
2140 | ||
2141 | return bfd_get_filename (abfd); | |
2142 | } | |
2143 | ||
2144 | /* Return the id of SECTION. | |
2145 | Returns 0 if SECTION doesn't exist. */ | |
2146 | ||
2147 | static int | |
2148 | get_section_id (const struct dwarf2_section_info *section) | |
2149 | { | |
2150 | asection *sectp = get_section_bfd_section (section); | |
2151 | ||
2152 | if (sectp == NULL) | |
2153 | return 0; | |
2154 | return sectp->id; | |
2155 | } | |
2156 | ||
2157 | /* Return the flags of SECTION. | |
73869dc2 | 2158 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2159 | |
2160 | static int | |
2161 | get_section_flags (const struct dwarf2_section_info *section) | |
2162 | { | |
2163 | asection *sectp = get_section_bfd_section (section); | |
2164 | ||
2165 | gdb_assert (sectp != NULL); | |
2166 | return bfd_get_section_flags (sectp->owner, sectp); | |
2167 | } | |
2168 | ||
251d32d9 TG |
2169 | /* When loading sections, we look either for uncompressed section or for |
2170 | compressed section names. */ | |
233a11ab CS |
2171 | |
2172 | static int | |
251d32d9 TG |
2173 | section_is_p (const char *section_name, |
2174 | const struct dwarf2_section_names *names) | |
233a11ab | 2175 | { |
251d32d9 TG |
2176 | if (names->normal != NULL |
2177 | && strcmp (section_name, names->normal) == 0) | |
2178 | return 1; | |
2179 | if (names->compressed != NULL | |
2180 | && strcmp (section_name, names->compressed) == 0) | |
2181 | return 1; | |
2182 | return 0; | |
233a11ab CS |
2183 | } |
2184 | ||
c906108c SS |
2185 | /* This function is mapped across the sections and remembers the |
2186 | offset and size of each of the debugging sections we are interested | |
2187 | in. */ | |
2188 | ||
2189 | static void | |
251d32d9 | 2190 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 2191 | { |
251d32d9 | 2192 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 2193 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
2194 | |
2195 | if (vnames == NULL) | |
2196 | names = &dwarf2_elf_names; | |
2197 | else | |
2198 | names = (const struct dwarf2_debug_sections *) vnames; | |
2199 | ||
dc7650b8 JK |
2200 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2201 | { | |
2202 | } | |
2203 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 2204 | { |
049412e3 | 2205 | dwarf2_per_objfile->info.s.section = sectp; |
dce234bc | 2206 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); |
c906108c | 2207 | } |
251d32d9 | 2208 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 2209 | { |
049412e3 | 2210 | dwarf2_per_objfile->abbrev.s.section = sectp; |
dce234bc | 2211 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); |
c906108c | 2212 | } |
251d32d9 | 2213 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 2214 | { |
049412e3 | 2215 | dwarf2_per_objfile->line.s.section = sectp; |
dce234bc | 2216 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); |
c906108c | 2217 | } |
251d32d9 | 2218 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 2219 | { |
049412e3 | 2220 | dwarf2_per_objfile->loc.s.section = sectp; |
dce234bc | 2221 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); |
c906108c | 2222 | } |
251d32d9 | 2223 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 2224 | { |
049412e3 | 2225 | dwarf2_per_objfile->macinfo.s.section = sectp; |
dce234bc | 2226 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); |
c906108c | 2227 | } |
cf2c3c16 TT |
2228 | else if (section_is_p (sectp->name, &names->macro)) |
2229 | { | |
049412e3 | 2230 | dwarf2_per_objfile->macro.s.section = sectp; |
cf2c3c16 TT |
2231 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); |
2232 | } | |
251d32d9 | 2233 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 2234 | { |
049412e3 | 2235 | dwarf2_per_objfile->str.s.section = sectp; |
dce234bc | 2236 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); |
c906108c | 2237 | } |
3019eac3 DE |
2238 | else if (section_is_p (sectp->name, &names->addr)) |
2239 | { | |
049412e3 | 2240 | dwarf2_per_objfile->addr.s.section = sectp; |
3019eac3 DE |
2241 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); |
2242 | } | |
251d32d9 | 2243 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 2244 | { |
049412e3 | 2245 | dwarf2_per_objfile->frame.s.section = sectp; |
dce234bc | 2246 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2247 | } |
251d32d9 | 2248 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 2249 | { |
049412e3 | 2250 | dwarf2_per_objfile->eh_frame.s.section = sectp; |
dc7650b8 | 2251 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2252 | } |
251d32d9 | 2253 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2254 | { |
049412e3 | 2255 | dwarf2_per_objfile->ranges.s.section = sectp; |
dce234bc | 2256 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); |
af34e669 | 2257 | } |
251d32d9 | 2258 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2259 | { |
8b70b953 TT |
2260 | struct dwarf2_section_info type_section; |
2261 | ||
2262 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2263 | type_section.s.section = sectp; |
8b70b953 TT |
2264 | type_section.size = bfd_get_section_size (sectp); |
2265 | ||
2266 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2267 | &type_section); | |
348e048f | 2268 | } |
251d32d9 | 2269 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd | 2270 | { |
049412e3 | 2271 | dwarf2_per_objfile->gdb_index.s.section = sectp; |
9291a0cd TT |
2272 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); |
2273 | } | |
dce234bc | 2274 | |
b4e1fd61 | 2275 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 FR |
2276 | && bfd_section_vma (abfd, sectp) == 0) |
2277 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2278 | } |
2279 | ||
fceca515 DE |
2280 | /* A helper function that decides whether a section is empty, |
2281 | or not present. */ | |
9e0ac564 TT |
2282 | |
2283 | static int | |
19ac8c2e | 2284 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2285 | { |
73869dc2 DE |
2286 | if (section->is_virtual) |
2287 | return section->size == 0; | |
049412e3 | 2288 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2289 | } |
2290 | ||
3019eac3 DE |
2291 | /* Read the contents of the section INFO. |
2292 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2293 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2294 | of the DWO file. | |
dce234bc | 2295 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2296 | |
dce234bc PP |
2297 | static void |
2298 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2299 | { |
a32a8923 | 2300 | asection *sectp; |
3019eac3 | 2301 | bfd *abfd; |
dce234bc | 2302 | gdb_byte *buf, *retbuf; |
c906108c | 2303 | |
be391dca TT |
2304 | if (info->readin) |
2305 | return; | |
dce234bc | 2306 | info->buffer = NULL; |
be391dca | 2307 | info->readin = 1; |
188dd5d6 | 2308 | |
9e0ac564 | 2309 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2310 | return; |
c906108c | 2311 | |
a32a8923 | 2312 | sectp = get_section_bfd_section (info); |
3019eac3 | 2313 | |
73869dc2 DE |
2314 | /* If this is a virtual section we need to read in the real one first. */ |
2315 | if (info->is_virtual) | |
2316 | { | |
2317 | struct dwarf2_section_info *containing_section = | |
2318 | get_containing_section (info); | |
2319 | ||
2320 | gdb_assert (sectp != NULL); | |
2321 | if ((sectp->flags & SEC_RELOC) != 0) | |
2322 | { | |
2323 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2324 | " supported in section %s [in module %s]"), | |
2325 | get_section_name (info), get_section_file_name (info)); | |
2326 | } | |
2327 | dwarf2_read_section (objfile, containing_section); | |
2328 | /* Other code should have already caught virtual sections that don't | |
2329 | fit. */ | |
2330 | gdb_assert (info->virtual_offset + info->size | |
2331 | <= containing_section->size); | |
2332 | /* If the real section is empty or there was a problem reading the | |
2333 | section we shouldn't get here. */ | |
2334 | gdb_assert (containing_section->buffer != NULL); | |
2335 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2336 | return; | |
2337 | } | |
2338 | ||
4bf44c1c TT |
2339 | /* If the section has relocations, we must read it ourselves. |
2340 | Otherwise we attach it to the BFD. */ | |
2341 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2342 | { |
d521ce57 | 2343 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2344 | return; |
dce234bc | 2345 | } |
dce234bc | 2346 | |
224c3ddb | 2347 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2348 | info->buffer = buf; |
dce234bc PP |
2349 | |
2350 | /* When debugging .o files, we may need to apply relocations; see | |
2351 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2352 | We never compress sections in .o files, so we only need to | |
2353 | try this when the section is not compressed. */ | |
ac8035ab | 2354 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2355 | if (retbuf != NULL) |
2356 | { | |
2357 | info->buffer = retbuf; | |
2358 | return; | |
2359 | } | |
2360 | ||
a32a8923 DE |
2361 | abfd = get_section_bfd_owner (info); |
2362 | gdb_assert (abfd != NULL); | |
2363 | ||
dce234bc PP |
2364 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2365 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2366 | { |
2367 | error (_("Dwarf Error: Can't read DWARF data" | |
2368 | " in section %s [in module %s]"), | |
2369 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2370 | } | |
dce234bc PP |
2371 | } |
2372 | ||
9e0ac564 TT |
2373 | /* A helper function that returns the size of a section in a safe way. |
2374 | If you are positive that the section has been read before using the | |
2375 | size, then it is safe to refer to the dwarf2_section_info object's | |
2376 | "size" field directly. In other cases, you must call this | |
2377 | function, because for compressed sections the size field is not set | |
2378 | correctly until the section has been read. */ | |
2379 | ||
2380 | static bfd_size_type | |
2381 | dwarf2_section_size (struct objfile *objfile, | |
2382 | struct dwarf2_section_info *info) | |
2383 | { | |
2384 | if (!info->readin) | |
2385 | dwarf2_read_section (objfile, info); | |
2386 | return info->size; | |
2387 | } | |
2388 | ||
dce234bc | 2389 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2390 | SECTION_NAME. */ |
af34e669 | 2391 | |
dce234bc | 2392 | void |
3017a003 TG |
2393 | dwarf2_get_section_info (struct objfile *objfile, |
2394 | enum dwarf2_section_enum sect, | |
d521ce57 | 2395 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2396 | bfd_size_type *sizep) |
2397 | { | |
2398 | struct dwarf2_per_objfile *data | |
9a3c8263 SM |
2399 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
2400 | dwarf2_objfile_data_key); | |
dce234bc | 2401 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2402 | |
2403 | /* We may see an objfile without any DWARF, in which case we just | |
2404 | return nothing. */ | |
2405 | if (data == NULL) | |
2406 | { | |
2407 | *sectp = NULL; | |
2408 | *bufp = NULL; | |
2409 | *sizep = 0; | |
2410 | return; | |
2411 | } | |
3017a003 TG |
2412 | switch (sect) |
2413 | { | |
2414 | case DWARF2_DEBUG_FRAME: | |
2415 | info = &data->frame; | |
2416 | break; | |
2417 | case DWARF2_EH_FRAME: | |
2418 | info = &data->eh_frame; | |
2419 | break; | |
2420 | default: | |
2421 | gdb_assert_not_reached ("unexpected section"); | |
2422 | } | |
dce234bc | 2423 | |
9e0ac564 | 2424 | dwarf2_read_section (objfile, info); |
dce234bc | 2425 | |
a32a8923 | 2426 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2427 | *bufp = info->buffer; |
2428 | *sizep = info->size; | |
2429 | } | |
2430 | ||
36586728 TT |
2431 | /* A helper function to find the sections for a .dwz file. */ |
2432 | ||
2433 | static void | |
2434 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2435 | { | |
9a3c8263 | 2436 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2437 | |
2438 | /* Note that we only support the standard ELF names, because .dwz | |
2439 | is ELF-only (at the time of writing). */ | |
2440 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2441 | { | |
049412e3 | 2442 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2443 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2444 | } | |
2445 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2446 | { | |
049412e3 | 2447 | dwz_file->info.s.section = sectp; |
36586728 TT |
2448 | dwz_file->info.size = bfd_get_section_size (sectp); |
2449 | } | |
2450 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2451 | { | |
049412e3 | 2452 | dwz_file->str.s.section = sectp; |
36586728 TT |
2453 | dwz_file->str.size = bfd_get_section_size (sectp); |
2454 | } | |
2455 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2456 | { | |
049412e3 | 2457 | dwz_file->line.s.section = sectp; |
36586728 TT |
2458 | dwz_file->line.size = bfd_get_section_size (sectp); |
2459 | } | |
2460 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2461 | { | |
049412e3 | 2462 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2463 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2464 | } | |
2ec9a5e0 TT |
2465 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2466 | { | |
049412e3 | 2467 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2468 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2469 | } | |
36586728 TT |
2470 | } |
2471 | ||
4db1a1dc TT |
2472 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2473 | there is no .gnu_debugaltlink section in the file. Error if there | |
2474 | is such a section but the file cannot be found. */ | |
36586728 TT |
2475 | |
2476 | static struct dwz_file * | |
2477 | dwarf2_get_dwz_file (void) | |
2478 | { | |
4db1a1dc TT |
2479 | bfd *dwz_bfd; |
2480 | char *data; | |
36586728 TT |
2481 | struct cleanup *cleanup; |
2482 | const char *filename; | |
2483 | struct dwz_file *result; | |
acd13123 | 2484 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2485 | size_t buildid_len; |
2486 | bfd_byte *buildid; | |
36586728 TT |
2487 | |
2488 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2489 | return dwarf2_per_objfile->dwz_file; | |
2490 | ||
4db1a1dc TT |
2491 | bfd_set_error (bfd_error_no_error); |
2492 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2493 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2494 | if (data == NULL) |
2495 | { | |
2496 | if (bfd_get_error () == bfd_error_no_error) | |
2497 | return NULL; | |
2498 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2499 | bfd_errmsg (bfd_get_error ())); | |
2500 | } | |
36586728 | 2501 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2502 | make_cleanup (xfree, buildid); |
36586728 | 2503 | |
acd13123 TT |
2504 | buildid_len = (size_t) buildid_len_arg; |
2505 | ||
f9d83a0b | 2506 | filename = (const char *) data; |
36586728 TT |
2507 | if (!IS_ABSOLUTE_PATH (filename)) |
2508 | { | |
4262abfb | 2509 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2510 | char *rel; |
2511 | ||
2512 | make_cleanup (xfree, abs); | |
2513 | abs = ldirname (abs); | |
2514 | make_cleanup (xfree, abs); | |
2515 | ||
2516 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2517 | make_cleanup (xfree, rel); | |
2518 | filename = rel; | |
2519 | } | |
2520 | ||
dc294be5 TT |
2521 | /* First try the file name given in the section. If that doesn't |
2522 | work, try to use the build-id instead. */ | |
36586728 | 2523 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); |
dc294be5 | 2524 | if (dwz_bfd != NULL) |
36586728 | 2525 | { |
dc294be5 TT |
2526 | if (!build_id_verify (dwz_bfd, buildid_len, buildid)) |
2527 | { | |
2528 | gdb_bfd_unref (dwz_bfd); | |
2529 | dwz_bfd = NULL; | |
2530 | } | |
36586728 TT |
2531 | } |
2532 | ||
dc294be5 TT |
2533 | if (dwz_bfd == NULL) |
2534 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2535 | ||
2536 | if (dwz_bfd == NULL) | |
2537 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2538 | objfile_name (dwarf2_per_objfile->objfile)); | |
2539 | ||
36586728 TT |
2540 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2541 | struct dwz_file); | |
2542 | result->dwz_bfd = dwz_bfd; | |
2543 | ||
2544 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2545 | ||
2546 | do_cleanups (cleanup); | |
2547 | ||
13aaf454 | 2548 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd); |
8d2cc612 | 2549 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2550 | return result; |
2551 | } | |
9291a0cd | 2552 | \f |
7b9f3c50 DE |
2553 | /* DWARF quick_symbols_functions support. */ |
2554 | ||
2555 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2556 | unique line tables, so we maintain a separate table of all .debug_line | |
2557 | derived entries to support the sharing. | |
2558 | All the quick functions need is the list of file names. We discard the | |
2559 | line_header when we're done and don't need to record it here. */ | |
2560 | struct quick_file_names | |
2561 | { | |
094b34ac DE |
2562 | /* The data used to construct the hash key. */ |
2563 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2564 | |
2565 | /* The number of entries in file_names, real_names. */ | |
2566 | unsigned int num_file_names; | |
2567 | ||
2568 | /* The file names from the line table, after being run through | |
2569 | file_full_name. */ | |
2570 | const char **file_names; | |
2571 | ||
2572 | /* The file names from the line table after being run through | |
2573 | gdb_realpath. These are computed lazily. */ | |
2574 | const char **real_names; | |
2575 | }; | |
2576 | ||
2577 | /* When using the index (and thus not using psymtabs), each CU has an | |
2578 | object of this type. This is used to hold information needed by | |
2579 | the various "quick" methods. */ | |
2580 | struct dwarf2_per_cu_quick_data | |
2581 | { | |
2582 | /* The file table. This can be NULL if there was no file table | |
2583 | or it's currently not read in. | |
2584 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2585 | struct quick_file_names *file_names; | |
2586 | ||
2587 | /* The corresponding symbol table. This is NULL if symbols for this | |
2588 | CU have not yet been read. */ | |
43f3e411 | 2589 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2590 | |
2591 | /* A temporary mark bit used when iterating over all CUs in | |
2592 | expand_symtabs_matching. */ | |
2593 | unsigned int mark : 1; | |
2594 | ||
2595 | /* True if we've tried to read the file table and found there isn't one. | |
2596 | There will be no point in trying to read it again next time. */ | |
2597 | unsigned int no_file_data : 1; | |
2598 | }; | |
2599 | ||
094b34ac DE |
2600 | /* Utility hash function for a stmt_list_hash. */ |
2601 | ||
2602 | static hashval_t | |
2603 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2604 | { | |
2605 | hashval_t v = 0; | |
2606 | ||
2607 | if (stmt_list_hash->dwo_unit != NULL) | |
2608 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2609 | v += stmt_list_hash->line_offset.sect_off; | |
2610 | return v; | |
2611 | } | |
2612 | ||
2613 | /* Utility equality function for a stmt_list_hash. */ | |
2614 | ||
2615 | static int | |
2616 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2617 | const struct stmt_list_hash *rhs) | |
2618 | { | |
2619 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2620 | return 0; | |
2621 | if (lhs->dwo_unit != NULL | |
2622 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2623 | return 0; | |
2624 | ||
2625 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2626 | } | |
2627 | ||
7b9f3c50 DE |
2628 | /* Hash function for a quick_file_names. */ |
2629 | ||
2630 | static hashval_t | |
2631 | hash_file_name_entry (const void *e) | |
2632 | { | |
9a3c8263 SM |
2633 | const struct quick_file_names *file_data |
2634 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2635 | |
094b34ac | 2636 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2637 | } |
2638 | ||
2639 | /* Equality function for a quick_file_names. */ | |
2640 | ||
2641 | static int | |
2642 | eq_file_name_entry (const void *a, const void *b) | |
2643 | { | |
9a3c8263 SM |
2644 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2645 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2646 | |
094b34ac | 2647 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2648 | } |
2649 | ||
2650 | /* Delete function for a quick_file_names. */ | |
2651 | ||
2652 | static void | |
2653 | delete_file_name_entry (void *e) | |
2654 | { | |
9a3c8263 | 2655 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2656 | int i; |
2657 | ||
2658 | for (i = 0; i < file_data->num_file_names; ++i) | |
2659 | { | |
2660 | xfree ((void*) file_data->file_names[i]); | |
2661 | if (file_data->real_names) | |
2662 | xfree ((void*) file_data->real_names[i]); | |
2663 | } | |
2664 | ||
2665 | /* The space for the struct itself lives on objfile_obstack, | |
2666 | so we don't free it here. */ | |
2667 | } | |
2668 | ||
2669 | /* Create a quick_file_names hash table. */ | |
2670 | ||
2671 | static htab_t | |
2672 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2673 | { | |
2674 | return htab_create_alloc (nr_initial_entries, | |
2675 | hash_file_name_entry, eq_file_name_entry, | |
2676 | delete_file_name_entry, xcalloc, xfree); | |
2677 | } | |
9291a0cd | 2678 | |
918dd910 JK |
2679 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2680 | have to be created afterwards. You should call age_cached_comp_units after | |
2681 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2682 | ||
2683 | static void | |
2684 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2685 | { | |
3019eac3 | 2686 | if (per_cu->is_debug_types) |
e5fe5e75 | 2687 | load_full_type_unit (per_cu); |
918dd910 | 2688 | else |
95554aad | 2689 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2690 | |
cc12ce38 DE |
2691 | if (per_cu->cu == NULL) |
2692 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2693 | |
2694 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2695 | } |
2696 | ||
a0f42c21 | 2697 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2698 | |
9291a0cd | 2699 | static void |
a0f42c21 | 2700 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2701 | { |
2702 | struct cleanup *back_to; | |
2703 | ||
f4dc4d17 DE |
2704 | /* Skip type_unit_groups, reading the type units they contain |
2705 | is handled elsewhere. */ | |
2706 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2707 | return; | |
2708 | ||
9291a0cd TT |
2709 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2710 | ||
95554aad | 2711 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2712 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2713 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2714 | { | |
2715 | queue_comp_unit (per_cu, language_minimal); | |
2716 | load_cu (per_cu); | |
89e63ee4 DE |
2717 | |
2718 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2719 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2720 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2721 | if (!per_cu->is_debug_types | |
cc12ce38 | 2722 | && per_cu->cu != NULL |
89e63ee4 DE |
2723 | && per_cu->cu->dwo_unit != NULL |
2724 | && dwarf2_per_objfile->index_table != NULL | |
2725 | && dwarf2_per_objfile->index_table->version <= 7 | |
2726 | /* DWP files aren't supported yet. */ | |
2727 | && get_dwp_file () == NULL) | |
2728 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2729 | } |
9291a0cd | 2730 | |
a0f42c21 | 2731 | process_queue (); |
9291a0cd TT |
2732 | |
2733 | /* Age the cache, releasing compilation units that have not | |
2734 | been used recently. */ | |
2735 | age_cached_comp_units (); | |
2736 | ||
2737 | do_cleanups (back_to); | |
2738 | } | |
2739 | ||
2740 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2741 | the objfile from which this CU came. Returns the resulting symbol | |
2742 | table. */ | |
2fdf6df6 | 2743 | |
43f3e411 | 2744 | static struct compunit_symtab * |
a0f42c21 | 2745 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2746 | { |
95554aad | 2747 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2748 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2749 | { |
2750 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2751 | increment_reading_symtab (); | |
a0f42c21 | 2752 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2753 | process_cu_includes (); |
9291a0cd TT |
2754 | do_cleanups (back_to); |
2755 | } | |
f194fefb | 2756 | |
43f3e411 | 2757 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2758 | } |
2759 | ||
8832e7e3 | 2760 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2761 | |
2762 | This is intended for loops like: | |
2763 | ||
2764 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2765 | + dwarf2_per_objfile->n_type_units); ++i) | |
2766 | { | |
8832e7e3 | 2767 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2768 | |
2769 | ...; | |
2770 | } | |
2771 | */ | |
2fdf6df6 | 2772 | |
1fd400ff | 2773 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2774 | dw2_get_cutu (int index) |
1fd400ff TT |
2775 | { |
2776 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2777 | { | |
f4dc4d17 | 2778 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2779 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2780 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2781 | } |
2782 | ||
2783 | return dwarf2_per_objfile->all_comp_units[index]; | |
2784 | } | |
2785 | ||
8832e7e3 DE |
2786 | /* Return the CU given its index. |
2787 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2788 | refers to a CU. */ | |
f4dc4d17 DE |
2789 | |
2790 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2791 | dw2_get_cu (int index) |
f4dc4d17 | 2792 | { |
8832e7e3 | 2793 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2794 | |
1fd400ff TT |
2795 | return dwarf2_per_objfile->all_comp_units[index]; |
2796 | } | |
2797 | ||
2ec9a5e0 TT |
2798 | /* A helper for create_cus_from_index that handles a given list of |
2799 | CUs. */ | |
2fdf6df6 | 2800 | |
74a0d9f6 | 2801 | static void |
2ec9a5e0 TT |
2802 | create_cus_from_index_list (struct objfile *objfile, |
2803 | const gdb_byte *cu_list, offset_type n_elements, | |
2804 | struct dwarf2_section_info *section, | |
2805 | int is_dwz, | |
2806 | int base_offset) | |
9291a0cd TT |
2807 | { |
2808 | offset_type i; | |
9291a0cd | 2809 | |
2ec9a5e0 | 2810 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2811 | { |
2812 | struct dwarf2_per_cu_data *the_cu; | |
2813 | ULONGEST offset, length; | |
2814 | ||
74a0d9f6 JK |
2815 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2816 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2817 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2818 | cu_list += 2 * 8; |
2819 | ||
2820 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2821 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2822 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2823 | the_cu->length = length; |
2824 | the_cu->objfile = objfile; | |
8a0459fd | 2825 | the_cu->section = section; |
9291a0cd TT |
2826 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2827 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2828 | the_cu->is_dwz = is_dwz; |
2829 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2830 | } |
9291a0cd TT |
2831 | } |
2832 | ||
2ec9a5e0 | 2833 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2834 | the CU objects for this objfile. */ |
2ec9a5e0 | 2835 | |
74a0d9f6 | 2836 | static void |
2ec9a5e0 TT |
2837 | create_cus_from_index (struct objfile *objfile, |
2838 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2839 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2840 | { | |
2841 | struct dwz_file *dwz; | |
2842 | ||
2843 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
2844 | dwarf2_per_objfile->all_comp_units = |
2845 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
2846 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 2847 | |
74a0d9f6 JK |
2848 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2849 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2850 | |
2851 | if (dwz_elements == 0) | |
74a0d9f6 | 2852 | return; |
2ec9a5e0 TT |
2853 | |
2854 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2855 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2856 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2857 | } |
2858 | ||
1fd400ff | 2859 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2860 | |
74a0d9f6 | 2861 | static void |
673bfd45 | 2862 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2863 | struct dwarf2_section_info *section, |
673bfd45 DE |
2864 | const gdb_byte *bytes, |
2865 | offset_type elements) | |
1fd400ff TT |
2866 | { |
2867 | offset_type i; | |
673bfd45 | 2868 | htab_t sig_types_hash; |
1fd400ff | 2869 | |
6aa5f3a6 DE |
2870 | dwarf2_per_objfile->n_type_units |
2871 | = dwarf2_per_objfile->n_allocated_type_units | |
2872 | = elements / 3; | |
8d749320 SM |
2873 | dwarf2_per_objfile->all_type_units = |
2874 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 2875 | |
673bfd45 | 2876 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2877 | |
2878 | for (i = 0; i < elements; i += 3) | |
2879 | { | |
52dc124a DE |
2880 | struct signatured_type *sig_type; |
2881 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2882 | void **slot; |
2883 | ||
74a0d9f6 JK |
2884 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2885 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2886 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2887 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2888 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2889 | bytes += 3 * 8; | |
2890 | ||
52dc124a | 2891 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2892 | struct signatured_type); |
52dc124a | 2893 | sig_type->signature = signature; |
3019eac3 DE |
2894 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2895 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2896 | sig_type->per_cu.section = section; |
52dc124a DE |
2897 | sig_type->per_cu.offset.sect_off = offset; |
2898 | sig_type->per_cu.objfile = objfile; | |
2899 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2900 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2901 | struct dwarf2_per_cu_quick_data); | |
2902 | ||
52dc124a DE |
2903 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2904 | *slot = sig_type; | |
1fd400ff | 2905 | |
b4dd5633 | 2906 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2907 | } |
2908 | ||
673bfd45 | 2909 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2910 | } |
2911 | ||
9291a0cd TT |
2912 | /* Read the address map data from the mapped index, and use it to |
2913 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2914 | |
9291a0cd TT |
2915 | static void |
2916 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2917 | { | |
3e29f34a | 2918 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd TT |
2919 | const gdb_byte *iter, *end; |
2920 | struct obstack temp_obstack; | |
2921 | struct addrmap *mutable_map; | |
2922 | struct cleanup *cleanup; | |
2923 | CORE_ADDR baseaddr; | |
2924 | ||
2925 | obstack_init (&temp_obstack); | |
2926 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2927 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2928 | ||
2929 | iter = index->address_table; | |
2930 | end = iter + index->address_table_size; | |
2931 | ||
2932 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2933 | ||
2934 | while (iter < end) | |
2935 | { | |
2936 | ULONGEST hi, lo, cu_index; | |
2937 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2938 | iter += 8; | |
2939 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2940 | iter += 8; | |
2941 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2942 | iter += 4; | |
f652bce2 | 2943 | |
24a55014 | 2944 | if (lo > hi) |
f652bce2 | 2945 | { |
24a55014 DE |
2946 | complaint (&symfile_complaints, |
2947 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2948 | hex_string (lo), hex_string (hi)); |
24a55014 | 2949 | continue; |
f652bce2 | 2950 | } |
24a55014 DE |
2951 | |
2952 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2953 | { |
2954 | complaint (&symfile_complaints, | |
2955 | _(".gdb_index address table has invalid CU number %u"), | |
2956 | (unsigned) cu_index); | |
24a55014 | 2957 | continue; |
f652bce2 | 2958 | } |
24a55014 | 2959 | |
3e29f34a MR |
2960 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
2961 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
2962 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
2963 | } |
2964 | ||
2965 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2966 | &objfile->objfile_obstack); | |
2967 | do_cleanups (cleanup); | |
2968 | } | |
2969 | ||
59d7bcaf JK |
2970 | /* The hash function for strings in the mapped index. This is the same as |
2971 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2972 | implementation. This is necessary because the hash function is tied to the | |
2973 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2974 | SYMBOL_HASH_NEXT. |
2975 | ||
2976 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2977 | |
9291a0cd | 2978 | static hashval_t |
559a7a62 | 2979 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2980 | { |
2981 | const unsigned char *str = (const unsigned char *) p; | |
2982 | hashval_t r = 0; | |
2983 | unsigned char c; | |
2984 | ||
2985 | while ((c = *str++) != 0) | |
559a7a62 JK |
2986 | { |
2987 | if (index_version >= 5) | |
2988 | c = tolower (c); | |
2989 | r = r * 67 + c - 113; | |
2990 | } | |
9291a0cd TT |
2991 | |
2992 | return r; | |
2993 | } | |
2994 | ||
2995 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2996 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2997 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2998 | |
9291a0cd TT |
2999 | static int |
3000 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
3001 | offset_type **vec_out) | |
3002 | { | |
0cf03b49 JK |
3003 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
3004 | offset_type hash; | |
9291a0cd | 3005 | offset_type slot, step; |
559a7a62 | 3006 | int (*cmp) (const char *, const char *); |
9291a0cd | 3007 | |
0cf03b49 JK |
3008 | if (current_language->la_language == language_cplus |
3009 | || current_language->la_language == language_java | |
45280282 IB |
3010 | || current_language->la_language == language_fortran |
3011 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3012 | { |
3013 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3014 | not contain any. */ | |
a8719064 | 3015 | |
72998fb3 | 3016 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3017 | { |
72998fb3 | 3018 | char *without_params = cp_remove_params (name); |
0cf03b49 | 3019 | |
72998fb3 DE |
3020 | if (without_params != NULL) |
3021 | { | |
3022 | make_cleanup (xfree, without_params); | |
3023 | name = without_params; | |
3024 | } | |
0cf03b49 JK |
3025 | } |
3026 | } | |
3027 | ||
559a7a62 | 3028 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3029 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3030 | simulate our NAME being searched is also lowercased. */ |
3031 | hash = mapped_index_string_hash ((index->version == 4 | |
3032 | && case_sensitivity == case_sensitive_off | |
3033 | ? 5 : index->version), | |
3034 | name); | |
3035 | ||
3876f04e DE |
3036 | slot = hash & (index->symbol_table_slots - 1); |
3037 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3038 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3039 | |
3040 | for (;;) | |
3041 | { | |
3042 | /* Convert a slot number to an offset into the table. */ | |
3043 | offset_type i = 2 * slot; | |
3044 | const char *str; | |
3876f04e | 3045 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
3046 | { |
3047 | do_cleanups (back_to); | |
3048 | return 0; | |
3049 | } | |
9291a0cd | 3050 | |
3876f04e | 3051 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3052 | if (!cmp (name, str)) |
9291a0cd TT |
3053 | { |
3054 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3055 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 3056 | do_cleanups (back_to); |
9291a0cd TT |
3057 | return 1; |
3058 | } | |
3059 | ||
3876f04e | 3060 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3061 | } |
3062 | } | |
3063 | ||
2ec9a5e0 TT |
3064 | /* A helper function that reads the .gdb_index from SECTION and fills |
3065 | in MAP. FILENAME is the name of the file containing the section; | |
3066 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3067 | ok to use deprecated sections. | |
3068 | ||
3069 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3070 | out parameters that are filled in with information about the CU and | |
3071 | TU lists in the section. | |
3072 | ||
3073 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3074 | |
9291a0cd | 3075 | static int |
2ec9a5e0 TT |
3076 | read_index_from_section (struct objfile *objfile, |
3077 | const char *filename, | |
3078 | int deprecated_ok, | |
3079 | struct dwarf2_section_info *section, | |
3080 | struct mapped_index *map, | |
3081 | const gdb_byte **cu_list, | |
3082 | offset_type *cu_list_elements, | |
3083 | const gdb_byte **types_list, | |
3084 | offset_type *types_list_elements) | |
9291a0cd | 3085 | { |
948f8e3d | 3086 | const gdb_byte *addr; |
2ec9a5e0 | 3087 | offset_type version; |
b3b272e1 | 3088 | offset_type *metadata; |
1fd400ff | 3089 | int i; |
9291a0cd | 3090 | |
2ec9a5e0 | 3091 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3092 | return 0; |
82430852 JK |
3093 | |
3094 | /* Older elfutils strip versions could keep the section in the main | |
3095 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3096 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3097 | return 0; |
3098 | ||
2ec9a5e0 | 3099 | dwarf2_read_section (objfile, section); |
9291a0cd | 3100 | |
2ec9a5e0 | 3101 | addr = section->buffer; |
9291a0cd | 3102 | /* Version check. */ |
1fd400ff | 3103 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3104 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3105 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3106 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3107 | indices. */ |
831adc1f | 3108 | if (version < 4) |
481860b3 GB |
3109 | { |
3110 | static int warning_printed = 0; | |
3111 | if (!warning_printed) | |
3112 | { | |
3113 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3114 | filename); |
481860b3 GB |
3115 | warning_printed = 1; |
3116 | } | |
3117 | return 0; | |
3118 | } | |
3119 | /* Index version 4 uses a different hash function than index version | |
3120 | 5 and later. | |
3121 | ||
3122 | Versions earlier than 6 did not emit psymbols for inlined | |
3123 | functions. Using these files will cause GDB not to be able to | |
3124 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3125 | indices unless the user has done |
3126 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3127 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3128 | { |
3129 | static int warning_printed = 0; | |
3130 | if (!warning_printed) | |
3131 | { | |
e615022a DE |
3132 | warning (_("\ |
3133 | Skipping deprecated .gdb_index section in %s.\n\ | |
3134 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3135 | to use the section anyway."), | |
2ec9a5e0 | 3136 | filename); |
481860b3 GB |
3137 | warning_printed = 1; |
3138 | } | |
3139 | return 0; | |
3140 | } | |
796a7ff8 | 3141 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3142 | of the TU (for symbols coming from TUs), |
3143 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3144 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3145 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3146 | These are just performance bugs, and we can't distinguish gdb-generated | |
3147 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3148 | |
481860b3 | 3149 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3150 | longer backward compatible. */ |
796a7ff8 | 3151 | if (version > 8) |
594e8718 | 3152 | return 0; |
9291a0cd | 3153 | |
559a7a62 | 3154 | map->version = version; |
2ec9a5e0 | 3155 | map->total_size = section->size; |
9291a0cd TT |
3156 | |
3157 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3158 | |
3159 | i = 0; | |
2ec9a5e0 TT |
3160 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3161 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3162 | / 8); | |
1fd400ff TT |
3163 | ++i; |
3164 | ||
2ec9a5e0 TT |
3165 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3166 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3167 | - MAYBE_SWAP (metadata[i])) | |
3168 | / 8); | |
987d643c | 3169 | ++i; |
1fd400ff TT |
3170 | |
3171 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3172 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3173 | - MAYBE_SWAP (metadata[i])); | |
3174 | ++i; | |
3175 | ||
3876f04e DE |
3176 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3177 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3178 | - MAYBE_SWAP (metadata[i])) | |
3179 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3180 | ++i; |
9291a0cd | 3181 | |
f9d83a0b | 3182 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3183 | |
2ec9a5e0 TT |
3184 | return 1; |
3185 | } | |
3186 | ||
3187 | ||
3188 | /* Read the index file. If everything went ok, initialize the "quick" | |
3189 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3190 | ||
3191 | static int | |
3192 | dwarf2_read_index (struct objfile *objfile) | |
3193 | { | |
3194 | struct mapped_index local_map, *map; | |
3195 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3196 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3197 | struct dwz_file *dwz; |
2ec9a5e0 | 3198 | |
4262abfb | 3199 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3200 | use_deprecated_index_sections, |
3201 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3202 | &cu_list, &cu_list_elements, | |
3203 | &types_list, &types_list_elements)) | |
3204 | return 0; | |
3205 | ||
0fefef59 | 3206 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3207 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3208 | return 0; |
3209 | ||
2ec9a5e0 TT |
3210 | /* If there is a .dwz file, read it so we can get its CU list as |
3211 | well. */ | |
4db1a1dc TT |
3212 | dwz = dwarf2_get_dwz_file (); |
3213 | if (dwz != NULL) | |
2ec9a5e0 | 3214 | { |
2ec9a5e0 TT |
3215 | struct mapped_index dwz_map; |
3216 | const gdb_byte *dwz_types_ignore; | |
3217 | offset_type dwz_types_elements_ignore; | |
3218 | ||
3219 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3220 | 1, | |
3221 | &dwz->gdb_index, &dwz_map, | |
3222 | &dwz_list, &dwz_list_elements, | |
3223 | &dwz_types_ignore, | |
3224 | &dwz_types_elements_ignore)) | |
3225 | { | |
3226 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3227 | bfd_get_filename (dwz->dwz_bfd)); | |
3228 | return 0; | |
3229 | } | |
3230 | } | |
3231 | ||
74a0d9f6 JK |
3232 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3233 | dwz_list_elements); | |
1fd400ff | 3234 | |
8b70b953 TT |
3235 | if (types_list_elements) |
3236 | { | |
3237 | struct dwarf2_section_info *section; | |
3238 | ||
3239 | /* We can only handle a single .debug_types when we have an | |
3240 | index. */ | |
3241 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3242 | return 0; | |
3243 | ||
3244 | section = VEC_index (dwarf2_section_info_def, | |
3245 | dwarf2_per_objfile->types, 0); | |
3246 | ||
74a0d9f6 JK |
3247 | create_signatured_type_table_from_index (objfile, section, types_list, |
3248 | types_list_elements); | |
8b70b953 | 3249 | } |
9291a0cd | 3250 | |
2ec9a5e0 TT |
3251 | create_addrmap_from_index (objfile, &local_map); |
3252 | ||
8d749320 | 3253 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
2ec9a5e0 | 3254 | *map = local_map; |
9291a0cd TT |
3255 | |
3256 | dwarf2_per_objfile->index_table = map; | |
3257 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3258 | dwarf2_per_objfile->quick_file_names_table = |
3259 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3260 | |
3261 | return 1; | |
3262 | } | |
3263 | ||
3264 | /* A helper for the "quick" functions which sets the global | |
3265 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3266 | |
9291a0cd TT |
3267 | static void |
3268 | dw2_setup (struct objfile *objfile) | |
3269 | { | |
9a3c8263 SM |
3270 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3271 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3272 | gdb_assert (dwarf2_per_objfile); |
3273 | } | |
3274 | ||
dee91e82 | 3275 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3276 | |
dee91e82 DE |
3277 | static void |
3278 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3279 | const gdb_byte *info_ptr, |
dee91e82 DE |
3280 | struct die_info *comp_unit_die, |
3281 | int has_children, | |
3282 | void *data) | |
9291a0cd | 3283 | { |
dee91e82 DE |
3284 | struct dwarf2_cu *cu = reader->cu; |
3285 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3286 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3287 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3288 | struct line_header *lh; |
9291a0cd | 3289 | struct attribute *attr; |
dee91e82 | 3290 | int i; |
15d034d0 | 3291 | const char *name, *comp_dir; |
7b9f3c50 DE |
3292 | void **slot; |
3293 | struct quick_file_names *qfn; | |
3294 | unsigned int line_offset; | |
9291a0cd | 3295 | |
0186c6a7 DE |
3296 | gdb_assert (! this_cu->is_debug_types); |
3297 | ||
07261596 TT |
3298 | /* Our callers never want to match partial units -- instead they |
3299 | will match the enclosing full CU. */ | |
3300 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3301 | { | |
3302 | this_cu->v.quick->no_file_data = 1; | |
3303 | return; | |
3304 | } | |
3305 | ||
0186c6a7 | 3306 | lh_cu = this_cu; |
7b9f3c50 DE |
3307 | lh = NULL; |
3308 | slot = NULL; | |
3309 | line_offset = 0; | |
dee91e82 DE |
3310 | |
3311 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3312 | if (attr) |
3313 | { | |
7b9f3c50 DE |
3314 | struct quick_file_names find_entry; |
3315 | ||
3316 | line_offset = DW_UNSND (attr); | |
3317 | ||
3318 | /* We may have already read in this line header (TU line header sharing). | |
3319 | If we have we're done. */ | |
094b34ac DE |
3320 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3321 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3322 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3323 | &find_entry, INSERT); | |
3324 | if (*slot != NULL) | |
3325 | { | |
9a3c8263 | 3326 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3327 | return; |
7b9f3c50 DE |
3328 | } |
3329 | ||
3019eac3 | 3330 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3331 | } |
3332 | if (lh == NULL) | |
3333 | { | |
094b34ac | 3334 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3335 | return; |
9291a0cd TT |
3336 | } |
3337 | ||
8d749320 | 3338 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac DE |
3339 | qfn->hash.dwo_unit = cu->dwo_unit; |
3340 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3341 | gdb_assert (slot != NULL); |
3342 | *slot = qfn; | |
9291a0cd | 3343 | |
dee91e82 | 3344 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3345 | |
7b9f3c50 | 3346 | qfn->num_file_names = lh->num_file_names; |
8d749320 SM |
3347 | qfn->file_names = |
3348 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->num_file_names); | |
9291a0cd | 3349 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3350 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3351 | qfn->real_names = NULL; | |
9291a0cd | 3352 | |
7b9f3c50 | 3353 | free_line_header (lh); |
7b9f3c50 | 3354 | |
094b34ac | 3355 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3356 | } |
3357 | ||
3358 | /* A helper for the "quick" functions which attempts to read the line | |
3359 | table for THIS_CU. */ | |
3360 | ||
3361 | static struct quick_file_names * | |
e4a48d9d | 3362 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3363 | { |
0186c6a7 DE |
3364 | /* This should never be called for TUs. */ |
3365 | gdb_assert (! this_cu->is_debug_types); | |
3366 | /* Nor type unit groups. */ | |
3367 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3368 | |
dee91e82 DE |
3369 | if (this_cu->v.quick->file_names != NULL) |
3370 | return this_cu->v.quick->file_names; | |
3371 | /* If we know there is no line data, no point in looking again. */ | |
3372 | if (this_cu->v.quick->no_file_data) | |
3373 | return NULL; | |
3374 | ||
0186c6a7 | 3375 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3376 | |
3377 | if (this_cu->v.quick->no_file_data) | |
3378 | return NULL; | |
3379 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3380 | } |
3381 | ||
3382 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3383 | real path for a given file name from the line table. */ |
2fdf6df6 | 3384 | |
9291a0cd | 3385 | static const char * |
7b9f3c50 DE |
3386 | dw2_get_real_path (struct objfile *objfile, |
3387 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3388 | { |
7b9f3c50 DE |
3389 | if (qfn->real_names == NULL) |
3390 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3391 | qfn->num_file_names, const char *); |
9291a0cd | 3392 | |
7b9f3c50 DE |
3393 | if (qfn->real_names[index] == NULL) |
3394 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3395 | |
7b9f3c50 | 3396 | return qfn->real_names[index]; |
9291a0cd TT |
3397 | } |
3398 | ||
3399 | static struct symtab * | |
3400 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3401 | { | |
43f3e411 | 3402 | struct compunit_symtab *cust; |
9291a0cd | 3403 | int index; |
ae2de4f8 | 3404 | |
9291a0cd TT |
3405 | dw2_setup (objfile); |
3406 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3407 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3408 | if (cust == NULL) | |
3409 | return NULL; | |
3410 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3411 | } |
3412 | ||
7b9f3c50 DE |
3413 | /* Traversal function for dw2_forget_cached_source_info. */ |
3414 | ||
3415 | static int | |
3416 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3417 | { |
7b9f3c50 | 3418 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3419 | |
7b9f3c50 | 3420 | if (file_data->real_names) |
9291a0cd | 3421 | { |
7b9f3c50 | 3422 | int i; |
9291a0cd | 3423 | |
7b9f3c50 | 3424 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3425 | { |
7b9f3c50 DE |
3426 | xfree ((void*) file_data->real_names[i]); |
3427 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3428 | } |
3429 | } | |
7b9f3c50 DE |
3430 | |
3431 | return 1; | |
3432 | } | |
3433 | ||
3434 | static void | |
3435 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3436 | { | |
3437 | dw2_setup (objfile); | |
3438 | ||
3439 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3440 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3441 | } |
3442 | ||
f8eba3c6 TT |
3443 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3444 | the symtabs and calls the iterator. */ | |
3445 | ||
3446 | static int | |
3447 | dw2_map_expand_apply (struct objfile *objfile, | |
3448 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3449 | const char *name, const char *real_path, |
f8eba3c6 TT |
3450 | int (*callback) (struct symtab *, void *), |
3451 | void *data) | |
3452 | { | |
43f3e411 | 3453 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3454 | |
3455 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3456 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3457 | return 0; |
3458 | ||
3459 | /* This may expand more than one symtab, and we want to iterate over | |
3460 | all of them. */ | |
a0f42c21 | 3461 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3462 | |
f5b95b50 | 3463 | return iterate_over_some_symtabs (name, real_path, callback, data, |
43f3e411 | 3464 | objfile->compunit_symtabs, last_made); |
f8eba3c6 TT |
3465 | } |
3466 | ||
3467 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3468 | ||
9291a0cd | 3469 | static int |
f8eba3c6 | 3470 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3471 | const char *real_path, |
f8eba3c6 TT |
3472 | int (*callback) (struct symtab *, void *), |
3473 | void *data) | |
9291a0cd TT |
3474 | { |
3475 | int i; | |
c011a4f4 | 3476 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3477 | |
3478 | dw2_setup (objfile); | |
ae2de4f8 | 3479 | |
848e3e78 DE |
3480 | /* The rule is CUs specify all the files, including those used by |
3481 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3482 | |
848e3e78 | 3483 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3484 | { |
3485 | int j; | |
8832e7e3 | 3486 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3487 | struct quick_file_names *file_data; |
9291a0cd | 3488 | |
3d7bb9d9 | 3489 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3490 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3491 | continue; |
3492 | ||
e4a48d9d | 3493 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3494 | if (file_data == NULL) |
9291a0cd TT |
3495 | continue; |
3496 | ||
7b9f3c50 | 3497 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3498 | { |
7b9f3c50 | 3499 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3500 | const char *this_real_name; |
9291a0cd | 3501 | |
af529f8f | 3502 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3503 | { |
f5b95b50 | 3504 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3505 | callback, data)) |
3506 | return 1; | |
288e77a7 | 3507 | continue; |
4aac40c8 | 3508 | } |
9291a0cd | 3509 | |
c011a4f4 DE |
3510 | /* Before we invoke realpath, which can get expensive when many |
3511 | files are involved, do a quick comparison of the basenames. */ | |
3512 | if (! basenames_may_differ | |
3513 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3514 | continue; | |
3515 | ||
da235a7c JK |
3516 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3517 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3518 | { |
da235a7c JK |
3519 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3520 | callback, data)) | |
3521 | return 1; | |
288e77a7 | 3522 | continue; |
da235a7c | 3523 | } |
9291a0cd | 3524 | |
da235a7c JK |
3525 | if (real_path != NULL) |
3526 | { | |
af529f8f JK |
3527 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3528 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3529 | if (this_real_name != NULL |
af529f8f | 3530 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3531 | { |
f5b95b50 | 3532 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3533 | callback, data)) |
3534 | return 1; | |
288e77a7 | 3535 | continue; |
9291a0cd TT |
3536 | } |
3537 | } | |
3538 | } | |
3539 | } | |
3540 | ||
9291a0cd TT |
3541 | return 0; |
3542 | } | |
3543 | ||
da51c347 DE |
3544 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3545 | ||
3546 | struct dw2_symtab_iterator | |
9291a0cd | 3547 | { |
da51c347 DE |
3548 | /* The internalized form of .gdb_index. */ |
3549 | struct mapped_index *index; | |
3550 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3551 | int want_specific_block; | |
3552 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3553 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3554 | int block_index; | |
3555 | /* The kind of symbol we're looking for. */ | |
3556 | domain_enum domain; | |
3557 | /* The list of CUs from the index entry of the symbol, | |
3558 | or NULL if not found. */ | |
3559 | offset_type *vec; | |
3560 | /* The next element in VEC to look at. */ | |
3561 | int next; | |
3562 | /* The number of elements in VEC, or zero if there is no match. */ | |
3563 | int length; | |
8943b874 DE |
3564 | /* Have we seen a global version of the symbol? |
3565 | If so we can ignore all further global instances. | |
3566 | This is to work around gold/15646, inefficient gold-generated | |
3567 | indices. */ | |
3568 | int global_seen; | |
da51c347 | 3569 | }; |
9291a0cd | 3570 | |
da51c347 DE |
3571 | /* Initialize the index symtab iterator ITER. |
3572 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3573 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3574 | |
9291a0cd | 3575 | static void |
da51c347 DE |
3576 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3577 | struct mapped_index *index, | |
3578 | int want_specific_block, | |
3579 | int block_index, | |
3580 | domain_enum domain, | |
3581 | const char *name) | |
3582 | { | |
3583 | iter->index = index; | |
3584 | iter->want_specific_block = want_specific_block; | |
3585 | iter->block_index = block_index; | |
3586 | iter->domain = domain; | |
3587 | iter->next = 0; | |
8943b874 | 3588 | iter->global_seen = 0; |
da51c347 DE |
3589 | |
3590 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3591 | iter->length = MAYBE_SWAP (*iter->vec); | |
3592 | else | |
3593 | { | |
3594 | iter->vec = NULL; | |
3595 | iter->length = 0; | |
3596 | } | |
3597 | } | |
3598 | ||
3599 | /* Return the next matching CU or NULL if there are no more. */ | |
3600 | ||
3601 | static struct dwarf2_per_cu_data * | |
3602 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3603 | { | |
3604 | for ( ; iter->next < iter->length; ++iter->next) | |
3605 | { | |
3606 | offset_type cu_index_and_attrs = | |
3607 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3608 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3609 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3610 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3611 | /* This value is only valid for index versions >= 7. */ | |
3612 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3613 | gdb_index_symbol_kind symbol_kind = | |
3614 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3615 | /* Only check the symbol attributes if they're present. | |
3616 | Indices prior to version 7 don't record them, | |
3617 | and indices >= 7 may elide them for certain symbols | |
3618 | (gold does this). */ | |
3619 | int attrs_valid = | |
3620 | (iter->index->version >= 7 | |
3621 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3622 | ||
3190f0c6 DE |
3623 | /* Don't crash on bad data. */ |
3624 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3625 | + dwarf2_per_objfile->n_type_units)) | |
3626 | { | |
3627 | complaint (&symfile_complaints, | |
3628 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3629 | " [in module %s]"), |
3630 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3631 | continue; |
3632 | } | |
3633 | ||
8832e7e3 | 3634 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3635 | |
da51c347 | 3636 | /* Skip if already read in. */ |
43f3e411 | 3637 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3638 | continue; |
3639 | ||
8943b874 DE |
3640 | /* Check static vs global. */ |
3641 | if (attrs_valid) | |
3642 | { | |
3643 | if (iter->want_specific_block | |
3644 | && want_static != is_static) | |
3645 | continue; | |
3646 | /* Work around gold/15646. */ | |
3647 | if (!is_static && iter->global_seen) | |
3648 | continue; | |
3649 | if (!is_static) | |
3650 | iter->global_seen = 1; | |
3651 | } | |
da51c347 DE |
3652 | |
3653 | /* Only check the symbol's kind if it has one. */ | |
3654 | if (attrs_valid) | |
3655 | { | |
3656 | switch (iter->domain) | |
3657 | { | |
3658 | case VAR_DOMAIN: | |
3659 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3660 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3661 | /* Some types are also in VAR_DOMAIN. */ | |
3662 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3663 | continue; | |
3664 | break; | |
3665 | case STRUCT_DOMAIN: | |
3666 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3667 | continue; | |
3668 | break; | |
3669 | case LABEL_DOMAIN: | |
3670 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3671 | continue; | |
3672 | break; | |
3673 | default: | |
3674 | break; | |
3675 | } | |
3676 | } | |
3677 | ||
3678 | ++iter->next; | |
3679 | return per_cu; | |
3680 | } | |
3681 | ||
3682 | return NULL; | |
3683 | } | |
3684 | ||
43f3e411 | 3685 | static struct compunit_symtab * |
da51c347 DE |
3686 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3687 | const char *name, domain_enum domain) | |
9291a0cd | 3688 | { |
43f3e411 | 3689 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3690 | struct mapped_index *index; |
3691 | ||
9291a0cd TT |
3692 | dw2_setup (objfile); |
3693 | ||
156942c7 DE |
3694 | index = dwarf2_per_objfile->index_table; |
3695 | ||
da51c347 | 3696 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3697 | if (index) |
9291a0cd | 3698 | { |
da51c347 DE |
3699 | struct dw2_symtab_iterator iter; |
3700 | struct dwarf2_per_cu_data *per_cu; | |
3701 | ||
3702 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3703 | |
da51c347 | 3704 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3705 | { |
b2e2f908 | 3706 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3707 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3708 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3709 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3710 | |
b2e2f908 DE |
3711 | sym = block_find_symbol (block, name, domain, |
3712 | block_find_non_opaque_type_preferred, | |
3713 | &with_opaque); | |
3714 | ||
da51c347 DE |
3715 | /* Some caution must be observed with overloaded functions |
3716 | and methods, since the index will not contain any overload | |
3717 | information (but NAME might contain it). */ | |
da51c347 | 3718 | |
b2e2f908 DE |
3719 | if (sym != NULL |
3720 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
3721 | return stab; | |
3722 | if (with_opaque != NULL | |
3723 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
3724 | stab_best = stab; | |
da51c347 DE |
3725 | |
3726 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3727 | } |
3728 | } | |
9291a0cd | 3729 | |
da51c347 | 3730 | return stab_best; |
9291a0cd TT |
3731 | } |
3732 | ||
3733 | static void | |
3734 | dw2_print_stats (struct objfile *objfile) | |
3735 | { | |
e4a48d9d | 3736 | int i, total, count; |
9291a0cd TT |
3737 | |
3738 | dw2_setup (objfile); | |
e4a48d9d | 3739 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3740 | count = 0; |
e4a48d9d | 3741 | for (i = 0; i < total; ++i) |
9291a0cd | 3742 | { |
8832e7e3 | 3743 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3744 | |
43f3e411 | 3745 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3746 | ++count; |
3747 | } | |
e4a48d9d | 3748 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3749 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3750 | } | |
3751 | ||
779bd270 DE |
3752 | /* This dumps minimal information about the index. |
3753 | It is called via "mt print objfiles". | |
3754 | One use is to verify .gdb_index has been loaded by the | |
3755 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3756 | ||
9291a0cd TT |
3757 | static void |
3758 | dw2_dump (struct objfile *objfile) | |
3759 | { | |
779bd270 DE |
3760 | dw2_setup (objfile); |
3761 | gdb_assert (dwarf2_per_objfile->using_index); | |
3762 | printf_filtered (".gdb_index:"); | |
3763 | if (dwarf2_per_objfile->index_table != NULL) | |
3764 | { | |
3765 | printf_filtered (" version %d\n", | |
3766 | dwarf2_per_objfile->index_table->version); | |
3767 | } | |
3768 | else | |
3769 | printf_filtered (" faked for \"readnow\"\n"); | |
3770 | printf_filtered ("\n"); | |
9291a0cd TT |
3771 | } |
3772 | ||
3773 | static void | |
3189cb12 DE |
3774 | dw2_relocate (struct objfile *objfile, |
3775 | const struct section_offsets *new_offsets, | |
3776 | const struct section_offsets *delta) | |
9291a0cd TT |
3777 | { |
3778 | /* There's nothing to relocate here. */ | |
3779 | } | |
3780 | ||
3781 | static void | |
3782 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3783 | const char *func_name) | |
3784 | { | |
da51c347 DE |
3785 | struct mapped_index *index; |
3786 | ||
3787 | dw2_setup (objfile); | |
3788 | ||
3789 | index = dwarf2_per_objfile->index_table; | |
3790 | ||
3791 | /* index is NULL if OBJF_READNOW. */ | |
3792 | if (index) | |
3793 | { | |
3794 | struct dw2_symtab_iterator iter; | |
3795 | struct dwarf2_per_cu_data *per_cu; | |
3796 | ||
3797 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3798 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3799 | func_name); | |
3800 | ||
3801 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3802 | dw2_instantiate_symtab (per_cu); | |
3803 | } | |
9291a0cd TT |
3804 | } |
3805 | ||
3806 | static void | |
3807 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3808 | { | |
3809 | int i; | |
3810 | ||
3811 | dw2_setup (objfile); | |
1fd400ff TT |
3812 | |
3813 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3814 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3815 | { |
8832e7e3 | 3816 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3817 | |
a0f42c21 | 3818 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3819 | } |
3820 | } | |
3821 | ||
3822 | static void | |
652a8996 JK |
3823 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3824 | const char *fullname) | |
9291a0cd TT |
3825 | { |
3826 | int i; | |
3827 | ||
3828 | dw2_setup (objfile); | |
d4637a04 DE |
3829 | |
3830 | /* We don't need to consider type units here. | |
3831 | This is only called for examining code, e.g. expand_line_sal. | |
3832 | There can be an order of magnitude (or more) more type units | |
3833 | than comp units, and we avoid them if we can. */ | |
3834 | ||
3835 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3836 | { |
3837 | int j; | |
8832e7e3 | 3838 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 3839 | struct quick_file_names *file_data; |
9291a0cd | 3840 | |
3d7bb9d9 | 3841 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3842 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3843 | continue; |
3844 | ||
e4a48d9d | 3845 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3846 | if (file_data == NULL) |
9291a0cd TT |
3847 | continue; |
3848 | ||
7b9f3c50 | 3849 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3850 | { |
652a8996 JK |
3851 | const char *this_fullname = file_data->file_names[j]; |
3852 | ||
3853 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3854 | { |
a0f42c21 | 3855 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3856 | break; |
3857 | } | |
3858 | } | |
3859 | } | |
3860 | } | |
3861 | ||
9291a0cd | 3862 | static void |
ade7ed9e | 3863 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 3864 | const char * name, domain_enum domain, |
ade7ed9e | 3865 | int global, |
40658b94 PH |
3866 | int (*callback) (struct block *, |
3867 | struct symbol *, void *), | |
2edb89d3 JK |
3868 | void *data, symbol_compare_ftype *match, |
3869 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3870 | { |
40658b94 | 3871 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3872 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3873 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3874 | } |
3875 | ||
3876 | static void | |
f8eba3c6 TT |
3877 | dw2_expand_symtabs_matching |
3878 | (struct objfile *objfile, | |
206f2a57 DE |
3879 | expand_symtabs_file_matcher_ftype *file_matcher, |
3880 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, | |
276d885b | 3881 | expand_symtabs_exp_notify_ftype *expansion_notify, |
f8eba3c6 TT |
3882 | enum search_domain kind, |
3883 | void *data) | |
9291a0cd TT |
3884 | { |
3885 | int i; | |
3886 | offset_type iter; | |
4b5246aa | 3887 | struct mapped_index *index; |
9291a0cd TT |
3888 | |
3889 | dw2_setup (objfile); | |
ae2de4f8 DE |
3890 | |
3891 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3892 | if (!dwarf2_per_objfile->index_table) |
3893 | return; | |
4b5246aa | 3894 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3895 | |
7b08b9eb | 3896 | if (file_matcher != NULL) |
24c79950 TT |
3897 | { |
3898 | struct cleanup *cleanup; | |
3899 | htab_t visited_found, visited_not_found; | |
3900 | ||
3901 | visited_found = htab_create_alloc (10, | |
3902 | htab_hash_pointer, htab_eq_pointer, | |
3903 | NULL, xcalloc, xfree); | |
3904 | cleanup = make_cleanup_htab_delete (visited_found); | |
3905 | visited_not_found = htab_create_alloc (10, | |
3906 | htab_hash_pointer, htab_eq_pointer, | |
3907 | NULL, xcalloc, xfree); | |
3908 | make_cleanup_htab_delete (visited_not_found); | |
3909 | ||
848e3e78 DE |
3910 | /* The rule is CUs specify all the files, including those used by |
3911 | any TU, so there's no need to scan TUs here. */ | |
3912 | ||
3913 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3914 | { |
3915 | int j; | |
8832e7e3 | 3916 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
3917 | struct quick_file_names *file_data; |
3918 | void **slot; | |
7b08b9eb | 3919 | |
61d96d7e DE |
3920 | QUIT; |
3921 | ||
24c79950 | 3922 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3923 | |
24c79950 | 3924 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3925 | if (per_cu->v.quick->compunit_symtab) |
24c79950 | 3926 | continue; |
7b08b9eb | 3927 | |
e4a48d9d | 3928 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3929 | if (file_data == NULL) |
3930 | continue; | |
7b08b9eb | 3931 | |
24c79950 TT |
3932 | if (htab_find (visited_not_found, file_data) != NULL) |
3933 | continue; | |
3934 | else if (htab_find (visited_found, file_data) != NULL) | |
3935 | { | |
3936 | per_cu->v.quick->mark = 1; | |
3937 | continue; | |
3938 | } | |
3939 | ||
3940 | for (j = 0; j < file_data->num_file_names; ++j) | |
3941 | { | |
da235a7c JK |
3942 | const char *this_real_name; |
3943 | ||
fbd9ab74 | 3944 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3945 | { |
3946 | per_cu->v.quick->mark = 1; | |
3947 | break; | |
3948 | } | |
da235a7c JK |
3949 | |
3950 | /* Before we invoke realpath, which can get expensive when many | |
3951 | files are involved, do a quick comparison of the basenames. */ | |
3952 | if (!basenames_may_differ | |
3953 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3954 | data, 1)) | |
3955 | continue; | |
3956 | ||
3957 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3958 | if (file_matcher (this_real_name, data, 0)) | |
3959 | { | |
3960 | per_cu->v.quick->mark = 1; | |
3961 | break; | |
3962 | } | |
24c79950 TT |
3963 | } |
3964 | ||
3965 | slot = htab_find_slot (per_cu->v.quick->mark | |
3966 | ? visited_found | |
3967 | : visited_not_found, | |
3968 | file_data, INSERT); | |
3969 | *slot = file_data; | |
3970 | } | |
3971 | ||
3972 | do_cleanups (cleanup); | |
3973 | } | |
9291a0cd | 3974 | |
3876f04e | 3975 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3976 | { |
3977 | offset_type idx = 2 * iter; | |
3978 | const char *name; | |
3979 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 3980 | int global_seen = 0; |
9291a0cd | 3981 | |
61d96d7e DE |
3982 | QUIT; |
3983 | ||
3876f04e | 3984 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3985 | continue; |
3986 | ||
3876f04e | 3987 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3988 | |
206f2a57 | 3989 | if (! (*symbol_matcher) (name, data)) |
9291a0cd TT |
3990 | continue; |
3991 | ||
3992 | /* The name was matched, now expand corresponding CUs that were | |
3993 | marked. */ | |
4b5246aa | 3994 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3995 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3996 | vec_len = MAYBE_SWAP (vec[0]); |
3997 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3998 | { | |
e254ef6a | 3999 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 4000 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
4001 | /* This value is only valid for index versions >= 7. */ |
4002 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
4003 | gdb_index_symbol_kind symbol_kind = |
4004 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4005 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
4006 | /* Only check the symbol attributes if they're present. |
4007 | Indices prior to version 7 don't record them, | |
4008 | and indices >= 7 may elide them for certain symbols | |
4009 | (gold does this). */ | |
4010 | int attrs_valid = | |
4011 | (index->version >= 7 | |
4012 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4013 | ||
8943b874 DE |
4014 | /* Work around gold/15646. */ |
4015 | if (attrs_valid) | |
4016 | { | |
4017 | if (!is_static && global_seen) | |
4018 | continue; | |
4019 | if (!is_static) | |
4020 | global_seen = 1; | |
4021 | } | |
4022 | ||
3190f0c6 DE |
4023 | /* Only check the symbol's kind if it has one. */ |
4024 | if (attrs_valid) | |
156942c7 DE |
4025 | { |
4026 | switch (kind) | |
4027 | { | |
4028 | case VARIABLES_DOMAIN: | |
4029 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4030 | continue; | |
4031 | break; | |
4032 | case FUNCTIONS_DOMAIN: | |
4033 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
4034 | continue; | |
4035 | break; | |
4036 | case TYPES_DOMAIN: | |
4037 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4038 | continue; | |
4039 | break; | |
4040 | default: | |
4041 | break; | |
4042 | } | |
4043 | } | |
4044 | ||
3190f0c6 DE |
4045 | /* Don't crash on bad data. */ |
4046 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4047 | + dwarf2_per_objfile->n_type_units)) | |
4048 | { | |
4049 | complaint (&symfile_complaints, | |
4050 | _(".gdb_index entry has bad CU index" | |
4262abfb | 4051 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
4052 | continue; |
4053 | } | |
4054 | ||
8832e7e3 | 4055 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 4056 | if (file_matcher == NULL || per_cu->v.quick->mark) |
276d885b GB |
4057 | { |
4058 | int symtab_was_null = | |
4059 | (per_cu->v.quick->compunit_symtab == NULL); | |
4060 | ||
4061 | dw2_instantiate_symtab (per_cu); | |
4062 | ||
4063 | if (expansion_notify != NULL | |
4064 | && symtab_was_null | |
4065 | && per_cu->v.quick->compunit_symtab != NULL) | |
4066 | { | |
4067 | expansion_notify (per_cu->v.quick->compunit_symtab, | |
4068 | data); | |
4069 | } | |
4070 | } | |
9291a0cd TT |
4071 | } |
4072 | } | |
4073 | } | |
4074 | ||
43f3e411 | 4075 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4076 | symtab. */ |
4077 | ||
43f3e411 DE |
4078 | static struct compunit_symtab * |
4079 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4080 | CORE_ADDR pc) | |
9703b513 TT |
4081 | { |
4082 | int i; | |
4083 | ||
43f3e411 DE |
4084 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4085 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4086 | return cust; | |
9703b513 | 4087 | |
43f3e411 | 4088 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4089 | return NULL; |
4090 | ||
43f3e411 | 4091 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4092 | { |
43f3e411 | 4093 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4094 | |
43f3e411 | 4095 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4096 | if (s != NULL) |
4097 | return s; | |
4098 | } | |
4099 | ||
4100 | return NULL; | |
4101 | } | |
4102 | ||
43f3e411 DE |
4103 | static struct compunit_symtab * |
4104 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4105 | struct bound_minimal_symbol msymbol, | |
4106 | CORE_ADDR pc, | |
4107 | struct obj_section *section, | |
4108 | int warn_if_readin) | |
9291a0cd TT |
4109 | { |
4110 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4111 | struct compunit_symtab *result; |
9291a0cd TT |
4112 | |
4113 | dw2_setup (objfile); | |
4114 | ||
4115 | if (!objfile->psymtabs_addrmap) | |
4116 | return NULL; | |
4117 | ||
9a3c8263 SM |
4118 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4119 | pc); | |
9291a0cd TT |
4120 | if (!data) |
4121 | return NULL; | |
4122 | ||
43f3e411 | 4123 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4124 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4125 | paddress (get_objfile_arch (objfile), pc)); |
4126 | ||
43f3e411 DE |
4127 | result |
4128 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4129 | pc); | |
9703b513 TT |
4130 | gdb_assert (result != NULL); |
4131 | return result; | |
9291a0cd TT |
4132 | } |
4133 | ||
9291a0cd | 4134 | static void |
44b13c5a | 4135 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4136 | void *data, int need_fullname) |
9291a0cd TT |
4137 | { |
4138 | int i; | |
24c79950 TT |
4139 | struct cleanup *cleanup; |
4140 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
4141 | NULL, xcalloc, xfree); | |
9291a0cd | 4142 | |
24c79950 | 4143 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 4144 | dw2_setup (objfile); |
ae2de4f8 | 4145 | |
848e3e78 DE |
4146 | /* The rule is CUs specify all the files, including those used by |
4147 | any TU, so there's no need to scan TUs here. | |
4148 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 4149 | |
848e3e78 | 4150 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 | 4151 | { |
8832e7e3 | 4152 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
24c79950 | 4153 | |
43f3e411 | 4154 | if (per_cu->v.quick->compunit_symtab) |
24c79950 TT |
4155 | { |
4156 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
4157 | INSERT); | |
4158 | ||
4159 | *slot = per_cu->v.quick->file_names; | |
4160 | } | |
4161 | } | |
4162 | ||
848e3e78 | 4163 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4164 | { |
4165 | int j; | |
8832e7e3 | 4166 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 4167 | struct quick_file_names *file_data; |
24c79950 | 4168 | void **slot; |
9291a0cd | 4169 | |
3d7bb9d9 | 4170 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4171 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4172 | continue; |
4173 | ||
e4a48d9d | 4174 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4175 | if (file_data == NULL) |
9291a0cd TT |
4176 | continue; |
4177 | ||
24c79950 TT |
4178 | slot = htab_find_slot (visited, file_data, INSERT); |
4179 | if (*slot) | |
4180 | { | |
4181 | /* Already visited. */ | |
4182 | continue; | |
4183 | } | |
4184 | *slot = file_data; | |
4185 | ||
7b9f3c50 | 4186 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4187 | { |
74e2f255 DE |
4188 | const char *this_real_name; |
4189 | ||
4190 | if (need_fullname) | |
4191 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4192 | else | |
4193 | this_real_name = NULL; | |
7b9f3c50 | 4194 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
4195 | } |
4196 | } | |
24c79950 TT |
4197 | |
4198 | do_cleanups (cleanup); | |
9291a0cd TT |
4199 | } |
4200 | ||
4201 | static int | |
4202 | dw2_has_symbols (struct objfile *objfile) | |
4203 | { | |
4204 | return 1; | |
4205 | } | |
4206 | ||
4207 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4208 | { | |
4209 | dw2_has_symbols, | |
4210 | dw2_find_last_source_symtab, | |
4211 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4212 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4213 | dw2_lookup_symbol, |
9291a0cd TT |
4214 | dw2_print_stats, |
4215 | dw2_dump, | |
4216 | dw2_relocate, | |
4217 | dw2_expand_symtabs_for_function, | |
4218 | dw2_expand_all_symtabs, | |
652a8996 | 4219 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4220 | dw2_map_matching_symbols, |
9291a0cd | 4221 | dw2_expand_symtabs_matching, |
43f3e411 | 4222 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4223 | dw2_map_symbol_filenames |
4224 | }; | |
4225 | ||
4226 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4227 | file will use psymtabs, or 1 if using the GNU index. */ | |
4228 | ||
4229 | int | |
4230 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4231 | { | |
4232 | /* If we're about to read full symbols, don't bother with the | |
4233 | indices. In this case we also don't care if some other debug | |
4234 | format is making psymtabs, because they are all about to be | |
4235 | expanded anyway. */ | |
4236 | if ((objfile->flags & OBJF_READNOW)) | |
4237 | { | |
4238 | int i; | |
4239 | ||
4240 | dwarf2_per_objfile->using_index = 1; | |
4241 | create_all_comp_units (objfile); | |
0e50663e | 4242 | create_all_type_units (objfile); |
7b9f3c50 DE |
4243 | dwarf2_per_objfile->quick_file_names_table = |
4244 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4245 | |
1fd400ff | 4246 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4247 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4248 | { |
8832e7e3 | 4249 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4250 | |
e254ef6a DE |
4251 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4252 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4253 | } |
4254 | ||
4255 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4256 | these functions will be no-ops because we will have expanded | |
4257 | all symtabs. */ | |
4258 | return 1; | |
4259 | } | |
4260 | ||
4261 | if (dwarf2_read_index (objfile)) | |
4262 | return 1; | |
4263 | ||
9291a0cd TT |
4264 | return 0; |
4265 | } | |
4266 | ||
4267 | \f | |
4268 | ||
dce234bc PP |
4269 | /* Build a partial symbol table. */ |
4270 | ||
4271 | void | |
f29dff0a | 4272 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4273 | { |
c9bf0622 | 4274 | |
f29dff0a | 4275 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4276 | { |
4277 | init_psymbol_list (objfile, 1024); | |
4278 | } | |
4279 | ||
492d29ea | 4280 | TRY |
c9bf0622 TT |
4281 | { |
4282 | /* This isn't really ideal: all the data we allocate on the | |
4283 | objfile's obstack is still uselessly kept around. However, | |
4284 | freeing it seems unsafe. */ | |
4285 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
4286 | ||
4287 | dwarf2_build_psymtabs_hard (objfile); | |
4288 | discard_cleanups (cleanups); | |
4289 | } | |
492d29ea PA |
4290 | CATCH (except, RETURN_MASK_ERROR) |
4291 | { | |
4292 | exception_print (gdb_stderr, except); | |
4293 | } | |
4294 | END_CATCH | |
c906108c | 4295 | } |
c906108c | 4296 | |
1ce1cefd DE |
4297 | /* Return the total length of the CU described by HEADER. */ |
4298 | ||
4299 | static unsigned int | |
4300 | get_cu_length (const struct comp_unit_head *header) | |
4301 | { | |
4302 | return header->initial_length_size + header->length; | |
4303 | } | |
4304 | ||
45452591 DE |
4305 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
4306 | ||
4307 | static inline int | |
b64f50a1 | 4308 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 4309 | { |
b64f50a1 | 4310 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 4311 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 4312 | |
b64f50a1 | 4313 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
4314 | } |
4315 | ||
3b80fe9b DE |
4316 | /* Find the base address of the compilation unit for range lists and |
4317 | location lists. It will normally be specified by DW_AT_low_pc. | |
4318 | In DWARF-3 draft 4, the base address could be overridden by | |
4319 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4320 | compilation units with discontinuous ranges. */ | |
4321 | ||
4322 | static void | |
4323 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4324 | { | |
4325 | struct attribute *attr; | |
4326 | ||
4327 | cu->base_known = 0; | |
4328 | cu->base_address = 0; | |
4329 | ||
4330 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4331 | if (attr) | |
4332 | { | |
31aa7e4e | 4333 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4334 | cu->base_known = 1; |
4335 | } | |
4336 | else | |
4337 | { | |
4338 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4339 | if (attr) | |
4340 | { | |
31aa7e4e | 4341 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4342 | cu->base_known = 1; |
4343 | } | |
4344 | } | |
4345 | } | |
4346 | ||
93311388 DE |
4347 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4348 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4349 | by the caller. */ | |
107d2387 | 4350 | |
d521ce57 | 4351 | static const gdb_byte * |
107d2387 | 4352 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4353 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4354 | { |
4355 | int signed_addr; | |
891d2f0b | 4356 | unsigned int bytes_read; |
c764a876 DE |
4357 | |
4358 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4359 | cu_header->initial_length_size = bytes_read; | |
4360 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4361 | info_ptr += bytes_read; |
107d2387 AC |
4362 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4363 | info_ptr += 2; | |
b64f50a1 JK |
4364 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4365 | &bytes_read); | |
613e1657 | 4366 | info_ptr += bytes_read; |
107d2387 AC |
4367 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4368 | info_ptr += 1; | |
4369 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4370 | if (signed_addr < 0) | |
8e65ff28 | 4371 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4372 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4373 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4374 | |
107d2387 AC |
4375 | return info_ptr; |
4376 | } | |
4377 | ||
36586728 TT |
4378 | /* Helper function that returns the proper abbrev section for |
4379 | THIS_CU. */ | |
4380 | ||
4381 | static struct dwarf2_section_info * | |
4382 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4383 | { | |
4384 | struct dwarf2_section_info *abbrev; | |
4385 | ||
4386 | if (this_cu->is_dwz) | |
4387 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4388 | else | |
4389 | abbrev = &dwarf2_per_objfile->abbrev; | |
4390 | ||
4391 | return abbrev; | |
4392 | } | |
4393 | ||
9ff913ba DE |
4394 | /* Subroutine of read_and_check_comp_unit_head and |
4395 | read_and_check_type_unit_head to simplify them. | |
4396 | Perform various error checking on the header. */ | |
4397 | ||
4398 | static void | |
4399 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4400 | struct dwarf2_section_info *section, |
4401 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4402 | { |
a32a8923 | 4403 | const char *filename = get_section_file_name (section); |
9ff913ba DE |
4404 | |
4405 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4406 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4407 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4408 | filename); | |
4409 | ||
b64f50a1 | 4410 | if (header->abbrev_offset.sect_off |
36586728 | 4411 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4412 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4413 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4414 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4415 | filename); |
4416 | ||
4417 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4418 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4419 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4420 | > section->size) |
4421 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4422 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4423 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4424 | filename); |
4425 | } | |
4426 | ||
4427 | /* Read in a CU/TU header and perform some basic error checking. | |
4428 | The contents of the header are stored in HEADER. | |
4429 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4430 | |
d521ce57 | 4431 | static const gdb_byte * |
9ff913ba DE |
4432 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4433 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4434 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4435 | const gdb_byte *info_ptr, |
9ff913ba | 4436 | int is_debug_types_section) |
72bf9492 | 4437 | { |
d521ce57 | 4438 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4439 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4440 | |
b64f50a1 | 4441 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4442 | |
72bf9492 DJ |
4443 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4444 | ||
460c1c54 CC |
4445 | /* If we're reading a type unit, skip over the signature and |
4446 | type_offset fields. */ | |
b0df02fd | 4447 | if (is_debug_types_section) |
460c1c54 CC |
4448 | info_ptr += 8 /*signature*/ + header->offset_size; |
4449 | ||
b64f50a1 | 4450 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4451 | |
4bdcc0c1 | 4452 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4453 | |
4454 | return info_ptr; | |
4455 | } | |
4456 | ||
348e048f DE |
4457 | /* Read in the types comp unit header information from .debug_types entry at |
4458 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4459 | ||
d521ce57 | 4460 | static const gdb_byte * |
9ff913ba DE |
4461 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4462 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4463 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4464 | const gdb_byte *info_ptr, |
dee91e82 DE |
4465 | ULONGEST *signature, |
4466 | cu_offset *type_offset_in_tu) | |
348e048f | 4467 | { |
d521ce57 | 4468 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4469 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4470 | |
b64f50a1 | 4471 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4472 | |
9ff913ba | 4473 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4474 | |
9ff913ba DE |
4475 | /* If we're reading a type unit, skip over the signature and |
4476 | type_offset fields. */ | |
4477 | if (signature != NULL) | |
4478 | *signature = read_8_bytes (abfd, info_ptr); | |
4479 | info_ptr += 8; | |
dee91e82 DE |
4480 | if (type_offset_in_tu != NULL) |
4481 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4482 | header->offset_size); | |
9ff913ba DE |
4483 | info_ptr += header->offset_size; |
4484 | ||
b64f50a1 | 4485 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4486 | |
4bdcc0c1 | 4487 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4488 | |
4489 | return info_ptr; | |
348e048f DE |
4490 | } |
4491 | ||
f4dc4d17 DE |
4492 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4493 | ||
4494 | static sect_offset | |
4495 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4496 | sect_offset offset) | |
4497 | { | |
a32a8923 | 4498 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4499 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4500 | unsigned int length, initial_length_size, offset_size; |
4501 | sect_offset abbrev_offset; | |
4502 | ||
4503 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4504 | info_ptr = section->buffer + offset.sect_off; | |
4505 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4506 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4507 | info_ptr += initial_length_size + 2 /*version*/; | |
4508 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4509 | return abbrev_offset; | |
4510 | } | |
4511 | ||
aaa75496 JB |
4512 | /* Allocate a new partial symtab for file named NAME and mark this new |
4513 | partial symtab as being an include of PST. */ | |
4514 | ||
4515 | static void | |
d521ce57 | 4516 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4517 | struct objfile *objfile) |
4518 | { | |
4519 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4520 | ||
fbd9ab74 JK |
4521 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4522 | { | |
4523 | /* It shares objfile->objfile_obstack. */ | |
4524 | subpst->dirname = pst->dirname; | |
4525 | } | |
4526 | ||
aaa75496 JB |
4527 | subpst->textlow = 0; |
4528 | subpst->texthigh = 0; | |
4529 | ||
8d749320 SM |
4530 | subpst->dependencies |
4531 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
4532 | subpst->dependencies[0] = pst; |
4533 | subpst->number_of_dependencies = 1; | |
4534 | ||
4535 | subpst->globals_offset = 0; | |
4536 | subpst->n_global_syms = 0; | |
4537 | subpst->statics_offset = 0; | |
4538 | subpst->n_static_syms = 0; | |
43f3e411 | 4539 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
4540 | subpst->read_symtab = pst->read_symtab; |
4541 | subpst->readin = 0; | |
4542 | ||
4543 | /* No private part is necessary for include psymtabs. This property | |
4544 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4545 | the regular ones. */ |
58a9656e | 4546 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4547 | } |
4548 | ||
4549 | /* Read the Line Number Program data and extract the list of files | |
4550 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4551 | partial symtab for each of these included files. */ |
aaa75496 JB |
4552 | |
4553 | static void | |
4554 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4555 | struct die_info *die, |
4556 | struct partial_symtab *pst) | |
aaa75496 | 4557 | { |
d85a05f0 DJ |
4558 | struct line_header *lh = NULL; |
4559 | struct attribute *attr; | |
aaa75496 | 4560 | |
d85a05f0 DJ |
4561 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4562 | if (attr) | |
3019eac3 | 4563 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4564 | if (lh == NULL) |
4565 | return; /* No linetable, so no includes. */ | |
4566 | ||
c6da4cef | 4567 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
527f3840 | 4568 | dwarf_decode_lines (lh, pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
4569 | |
4570 | free_line_header (lh); | |
4571 | } | |
4572 | ||
348e048f | 4573 | static hashval_t |
52dc124a | 4574 | hash_signatured_type (const void *item) |
348e048f | 4575 | { |
9a3c8263 SM |
4576 | const struct signatured_type *sig_type |
4577 | = (const struct signatured_type *) item; | |
9a619af0 | 4578 | |
348e048f | 4579 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4580 | return sig_type->signature; |
348e048f DE |
4581 | } |
4582 | ||
4583 | static int | |
52dc124a | 4584 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 4585 | { |
9a3c8263 SM |
4586 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
4587 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 4588 | |
348e048f DE |
4589 | return lhs->signature == rhs->signature; |
4590 | } | |
4591 | ||
1fd400ff TT |
4592 | /* Allocate a hash table for signatured types. */ |
4593 | ||
4594 | static htab_t | |
673bfd45 | 4595 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4596 | { |
4597 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4598 | hash_signatured_type, |
4599 | eq_signatured_type, | |
1fd400ff TT |
4600 | NULL, |
4601 | &objfile->objfile_obstack, | |
4602 | hashtab_obstack_allocate, | |
4603 | dummy_obstack_deallocate); | |
4604 | } | |
4605 | ||
d467dd73 | 4606 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4607 | |
4608 | static int | |
d467dd73 | 4609 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 4610 | { |
9a3c8263 SM |
4611 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
4612 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 4613 | |
b4dd5633 | 4614 | **datap = sigt; |
1fd400ff TT |
4615 | ++*datap; |
4616 | ||
4617 | return 1; | |
4618 | } | |
4619 | ||
c88ee1f0 DE |
4620 | /* Create the hash table of all entries in the .debug_types |
4621 | (or .debug_types.dwo) section(s). | |
4622 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4623 | otherwise it is NULL. | |
4624 | ||
4625 | The result is a pointer to the hash table or NULL if there are no types. | |
4626 | ||
4627 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4628 | |
3019eac3 DE |
4629 | static htab_t |
4630 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4631 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4632 | { |
3019eac3 | 4633 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4634 | htab_t types_htab = NULL; |
8b70b953 TT |
4635 | int ix; |
4636 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4637 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4638 | |
3019eac3 DE |
4639 | if (VEC_empty (dwarf2_section_info_def, types)) |
4640 | return NULL; | |
348e048f | 4641 | |
4bdcc0c1 DE |
4642 | abbrev_section = (dwo_file != NULL |
4643 | ? &dwo_file->sections.abbrev | |
4644 | : &dwarf2_per_objfile->abbrev); | |
4645 | ||
b4f54984 | 4646 | if (dwarf_read_debug) |
09406207 DE |
4647 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", |
4648 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4649 | get_section_file_name (abbrev_section)); |
09406207 | 4650 | |
8b70b953 | 4651 | for (ix = 0; |
3019eac3 | 4652 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4653 | ++ix) |
4654 | { | |
3019eac3 | 4655 | bfd *abfd; |
d521ce57 | 4656 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4657 | |
8b70b953 TT |
4658 | dwarf2_read_section (objfile, section); |
4659 | info_ptr = section->buffer; | |
348e048f | 4660 | |
8b70b953 TT |
4661 | if (info_ptr == NULL) |
4662 | continue; | |
348e048f | 4663 | |
3019eac3 | 4664 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4665 | not present, in which case the bfd is unknown. */ |
4666 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4667 | |
dee91e82 DE |
4668 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4669 | because we don't need to read any dies: the signature is in the | |
4670 | header. */ | |
8b70b953 TT |
4671 | |
4672 | end_ptr = info_ptr + section->size; | |
4673 | while (info_ptr < end_ptr) | |
4674 | { | |
b64f50a1 | 4675 | sect_offset offset; |
3019eac3 | 4676 | cu_offset type_offset_in_tu; |
8b70b953 | 4677 | ULONGEST signature; |
52dc124a | 4678 | struct signatured_type *sig_type; |
3019eac3 | 4679 | struct dwo_unit *dwo_tu; |
8b70b953 | 4680 | void **slot; |
d521ce57 | 4681 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4682 | struct comp_unit_head header; |
dee91e82 | 4683 | unsigned int length; |
348e048f | 4684 | |
b64f50a1 | 4685 | offset.sect_off = ptr - section->buffer; |
348e048f | 4686 | |
8b70b953 | 4687 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4688 | table, but we don't need anything else just yet. */ |
348e048f | 4689 | |
4bdcc0c1 DE |
4690 | ptr = read_and_check_type_unit_head (&header, section, |
4691 | abbrev_section, ptr, | |
3019eac3 | 4692 | &signature, &type_offset_in_tu); |
6caca83c | 4693 | |
1ce1cefd | 4694 | length = get_cu_length (&header); |
dee91e82 | 4695 | |
6caca83c | 4696 | /* Skip dummy type units. */ |
dee91e82 DE |
4697 | if (ptr >= info_ptr + length |
4698 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4699 | { |
1ce1cefd | 4700 | info_ptr += length; |
6caca83c CC |
4701 | continue; |
4702 | } | |
8b70b953 | 4703 | |
0349ea22 DE |
4704 | if (types_htab == NULL) |
4705 | { | |
4706 | if (dwo_file) | |
4707 | types_htab = allocate_dwo_unit_table (objfile); | |
4708 | else | |
4709 | types_htab = allocate_signatured_type_table (objfile); | |
4710 | } | |
4711 | ||
3019eac3 DE |
4712 | if (dwo_file) |
4713 | { | |
4714 | sig_type = NULL; | |
4715 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4716 | struct dwo_unit); | |
4717 | dwo_tu->dwo_file = dwo_file; | |
4718 | dwo_tu->signature = signature; | |
4719 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4720 | dwo_tu->section = section; |
3019eac3 DE |
4721 | dwo_tu->offset = offset; |
4722 | dwo_tu->length = length; | |
4723 | } | |
4724 | else | |
4725 | { | |
4726 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4727 | The real type_offset is in the DWO file. */ | |
4728 | dwo_tu = NULL; | |
4729 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4730 | struct signatured_type); | |
4731 | sig_type->signature = signature; | |
4732 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4733 | sig_type->per_cu.objfile = objfile; | |
4734 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4735 | sig_type->per_cu.section = section; |
3019eac3 DE |
4736 | sig_type->per_cu.offset = offset; |
4737 | sig_type->per_cu.length = length; | |
4738 | } | |
8b70b953 | 4739 | |
3019eac3 DE |
4740 | slot = htab_find_slot (types_htab, |
4741 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4742 | INSERT); | |
8b70b953 TT |
4743 | gdb_assert (slot != NULL); |
4744 | if (*slot != NULL) | |
4745 | { | |
3019eac3 DE |
4746 | sect_offset dup_offset; |
4747 | ||
4748 | if (dwo_file) | |
4749 | { | |
9a3c8263 SM |
4750 | const struct dwo_unit *dup_tu |
4751 | = (const struct dwo_unit *) *slot; | |
3019eac3 DE |
4752 | |
4753 | dup_offset = dup_tu->offset; | |
4754 | } | |
4755 | else | |
4756 | { | |
9a3c8263 SM |
4757 | const struct signatured_type *dup_tu |
4758 | = (const struct signatured_type *) *slot; | |
3019eac3 DE |
4759 | |
4760 | dup_offset = dup_tu->per_cu.offset; | |
4761 | } | |
b3c8eb43 | 4762 | |
8b70b953 | 4763 | complaint (&symfile_complaints, |
c88ee1f0 | 4764 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4765 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4766 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4767 | hex_string (signature)); |
8b70b953 | 4768 | } |
3019eac3 | 4769 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4770 | |
b4f54984 | 4771 | if (dwarf_read_debug > 1) |
4031ecc5 | 4772 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4773 | offset.sect_off, |
4031ecc5 | 4774 | hex_string (signature)); |
348e048f | 4775 | |
dee91e82 | 4776 | info_ptr += length; |
8b70b953 | 4777 | } |
348e048f DE |
4778 | } |
4779 | ||
3019eac3 DE |
4780 | return types_htab; |
4781 | } | |
4782 | ||
4783 | /* Create the hash table of all entries in the .debug_types section, | |
4784 | and initialize all_type_units. | |
4785 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4786 | otherwise non-zero. */ | |
4787 | ||
4788 | static int | |
4789 | create_all_type_units (struct objfile *objfile) | |
4790 | { | |
4791 | htab_t types_htab; | |
b4dd5633 | 4792 | struct signatured_type **iter; |
3019eac3 DE |
4793 | |
4794 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4795 | if (types_htab == NULL) | |
4796 | { | |
4797 | dwarf2_per_objfile->signatured_types = NULL; | |
4798 | return 0; | |
4799 | } | |
4800 | ||
348e048f DE |
4801 | dwarf2_per_objfile->signatured_types = types_htab; |
4802 | ||
6aa5f3a6 DE |
4803 | dwarf2_per_objfile->n_type_units |
4804 | = dwarf2_per_objfile->n_allocated_type_units | |
4805 | = htab_elements (types_htab); | |
8d749320 SM |
4806 | dwarf2_per_objfile->all_type_units = |
4807 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
4808 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4809 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4810 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4811 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4812 | |
348e048f DE |
4813 | return 1; |
4814 | } | |
4815 | ||
6aa5f3a6 DE |
4816 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
4817 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
4818 | Otherwise we find one. */ | |
4819 | ||
4820 | static struct signatured_type * | |
4821 | add_type_unit (ULONGEST sig, void **slot) | |
4822 | { | |
4823 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4824 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4825 | struct signatured_type *sig_type; | |
4826 | ||
4827 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
4828 | ++n_type_units; | |
4829 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
4830 | { | |
4831 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
4832 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
4833 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
4834 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
4835 | = XRESIZEVEC (struct signatured_type *, |
4836 | dwarf2_per_objfile->all_type_units, | |
4837 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
4838 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
4839 | } | |
4840 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4841 | ||
4842 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4843 | struct signatured_type); | |
4844 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4845 | sig_type->signature = sig; | |
4846 | sig_type->per_cu.is_debug_types = 1; | |
4847 | if (dwarf2_per_objfile->using_index) | |
4848 | { | |
4849 | sig_type->per_cu.v.quick = | |
4850 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4851 | struct dwarf2_per_cu_quick_data); | |
4852 | } | |
4853 | ||
4854 | if (slot == NULL) | |
4855 | { | |
4856 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4857 | sig_type, INSERT); | |
4858 | } | |
4859 | gdb_assert (*slot == NULL); | |
4860 | *slot = sig_type; | |
4861 | /* The rest of sig_type must be filled in by the caller. */ | |
4862 | return sig_type; | |
4863 | } | |
4864 | ||
a2ce51a0 DE |
4865 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4866 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4867 | ||
4868 | static void | |
4869 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4870 | struct signatured_type *sig_entry, | |
4871 | struct dwo_unit *dwo_entry) | |
4872 | { | |
7ee85ab1 | 4873 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4874 | gdb_assert (! sig_entry->per_cu.queued); |
4875 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
4876 | if (dwarf2_per_objfile->using_index) |
4877 | { | |
4878 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 4879 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
4880 | } |
4881 | else | |
4882 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 DE |
4883 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
4884 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4885 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4886 | gdb_assert (sig_entry->dwo_unit == NULL); |
4887 | ||
4888 | sig_entry->per_cu.section = dwo_entry->section; | |
4889 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4890 | sig_entry->per_cu.length = dwo_entry->length; | |
4891 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4892 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4893 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4894 | sig_entry->dwo_unit = dwo_entry; | |
4895 | } | |
4896 | ||
4897 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4898 | If we haven't read the TU yet, create the signatured_type data structure |
4899 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4900 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4901 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4902 | containing that CU. Otherwise we could end up reading several other DWO | |
4903 | files (due to comdat folding) to process the transitive closure of all the | |
4904 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4905 | type signature that it needs. | |
a2ce51a0 DE |
4906 | We only do this for .gdb_index because in the psymtab case we already have |
4907 | to read all the DWOs to build the type unit groups. */ | |
4908 | ||
4909 | static struct signatured_type * | |
4910 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4911 | { | |
4912 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4913 | struct dwo_file *dwo_file; | |
4914 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4915 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4916 | void **slot; |
a2ce51a0 DE |
4917 | |
4918 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4919 | ||
6aa5f3a6 DE |
4920 | /* If TU skeletons have been removed then we may not have read in any |
4921 | TUs yet. */ | |
4922 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4923 | { | |
4924 | dwarf2_per_objfile->signatured_types | |
4925 | = allocate_signatured_type_table (objfile); | |
4926 | } | |
a2ce51a0 DE |
4927 | |
4928 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
4929 | Use the global signatured_types array to do our own comdat-folding |
4930 | of types. If this is the first time we're reading this TU, and | |
4931 | the TU has an entry in .gdb_index, replace the recorded data from | |
4932 | .gdb_index with this TU. */ | |
a2ce51a0 | 4933 | |
a2ce51a0 | 4934 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
4935 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
4936 | &find_sig_entry, INSERT); | |
9a3c8263 | 4937 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
4938 | |
4939 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
4940 | read. Don't reassign the global entry to point to this DWO if that's |
4941 | the case. Also note that if the TU is already being read, it may not | |
4942 | have come from a DWO, the program may be a mix of Fission-compiled | |
4943 | code and non-Fission-compiled code. */ | |
4944 | ||
4945 | /* Have we already tried to read this TU? | |
4946 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
4947 | needn't exist in the global table yet). */ | |
4948 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
4949 | return sig_entry; |
4950 | ||
6aa5f3a6 DE |
4951 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
4952 | dwo_unit of the TU itself. */ | |
4953 | dwo_file = cu->dwo_unit->dwo_file; | |
4954 | ||
a2ce51a0 DE |
4955 | /* Ok, this is the first time we're reading this TU. */ |
4956 | if (dwo_file->tus == NULL) | |
4957 | return NULL; | |
4958 | find_dwo_entry.signature = sig; | |
9a3c8263 | 4959 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
4960 | if (dwo_entry == NULL) |
4961 | return NULL; | |
4962 | ||
6aa5f3a6 DE |
4963 | /* If the global table doesn't have an entry for this TU, add one. */ |
4964 | if (sig_entry == NULL) | |
4965 | sig_entry = add_type_unit (sig, slot); | |
4966 | ||
a2ce51a0 | 4967 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 4968 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4969 | return sig_entry; |
4970 | } | |
4971 | ||
a2ce51a0 DE |
4972 | /* Subroutine of lookup_signatured_type. |
4973 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
4974 | then try the DWP file. If the TU stub (skeleton) has been removed then |
4975 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
4976 | |
4977 | static struct signatured_type * | |
4978 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4979 | { | |
4980 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4981 | struct dwp_file *dwp_file = get_dwp_file (); | |
4982 | struct dwo_unit *dwo_entry; | |
4983 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4984 | void **slot; |
a2ce51a0 DE |
4985 | |
4986 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4987 | gdb_assert (dwp_file != NULL); | |
4988 | ||
6aa5f3a6 DE |
4989 | /* If TU skeletons have been removed then we may not have read in any |
4990 | TUs yet. */ | |
4991 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 4992 | { |
6aa5f3a6 DE |
4993 | dwarf2_per_objfile->signatured_types |
4994 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
4995 | } |
4996 | ||
6aa5f3a6 DE |
4997 | find_sig_entry.signature = sig; |
4998 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4999 | &find_sig_entry, INSERT); | |
9a3c8263 | 5000 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5001 | |
5002 | /* Have we already tried to read this TU? | |
5003 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5004 | needn't exist in the global table yet). */ | |
5005 | if (sig_entry != NULL) | |
5006 | return sig_entry; | |
5007 | ||
a2ce51a0 DE |
5008 | if (dwp_file->tus == NULL) |
5009 | return NULL; | |
57d63ce2 DE |
5010 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5011 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5012 | if (dwo_entry == NULL) |
5013 | return NULL; | |
5014 | ||
6aa5f3a6 | 5015 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5016 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5017 | ||
a2ce51a0 DE |
5018 | return sig_entry; |
5019 | } | |
5020 | ||
380bca97 | 5021 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5022 | Returns NULL if signature SIG is not present in the table. |
5023 | It is up to the caller to complain about this. */ | |
348e048f DE |
5024 | |
5025 | static struct signatured_type * | |
a2ce51a0 | 5026 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5027 | { |
a2ce51a0 DE |
5028 | if (cu->dwo_unit |
5029 | && dwarf2_per_objfile->using_index) | |
5030 | { | |
5031 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5032 | These cases require special processing. */ | |
5033 | if (get_dwp_file () == NULL) | |
5034 | return lookup_dwo_signatured_type (cu, sig); | |
5035 | else | |
5036 | return lookup_dwp_signatured_type (cu, sig); | |
5037 | } | |
5038 | else | |
5039 | { | |
5040 | struct signatured_type find_entry, *entry; | |
348e048f | 5041 | |
a2ce51a0 DE |
5042 | if (dwarf2_per_objfile->signatured_types == NULL) |
5043 | return NULL; | |
5044 | find_entry.signature = sig; | |
9a3c8263 SM |
5045 | entry = ((struct signatured_type *) |
5046 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5047 | return entry; |
5048 | } | |
348e048f | 5049 | } |
42e7ad6c DE |
5050 | \f |
5051 | /* Low level DIE reading support. */ | |
348e048f | 5052 | |
d85a05f0 DJ |
5053 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5054 | ||
5055 | static void | |
5056 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5057 | struct dwarf2_cu *cu, |
3019eac3 DE |
5058 | struct dwarf2_section_info *section, |
5059 | struct dwo_file *dwo_file) | |
d85a05f0 | 5060 | { |
fceca515 | 5061 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5062 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5063 | reader->cu = cu; |
3019eac3 | 5064 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5065 | reader->die_section = section; |
5066 | reader->buffer = section->buffer; | |
f664829e | 5067 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5068 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5069 | } |
5070 | ||
b0c7bfa9 DE |
5071 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5072 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5073 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5074 | already. | |
5075 | ||
5076 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5077 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5078 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5079 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5080 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5081 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5082 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5083 | are filled in with the info of the DIE from the DWO file. | |
5084 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5085 | provided an abbrev table to use. | |
5086 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5087 | ||
5088 | static int | |
5089 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5090 | struct dwo_unit *dwo_unit, | |
5091 | int abbrev_table_provided, | |
5092 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5093 | const char *stub_comp_dir, |
b0c7bfa9 | 5094 | struct die_reader_specs *result_reader, |
d521ce57 | 5095 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5096 | struct die_info **result_comp_unit_die, |
5097 | int *result_has_children) | |
5098 | { | |
5099 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5100 | struct dwarf2_cu *cu = this_cu->cu; | |
5101 | struct dwarf2_section_info *section; | |
5102 | bfd *abfd; | |
d521ce57 | 5103 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5104 | ULONGEST signature; /* Or dwo_id. */ |
5105 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5106 | int i,num_extra_attrs; | |
5107 | struct dwarf2_section_info *dwo_abbrev_section; | |
5108 | struct attribute *attr; | |
5109 | struct die_info *comp_unit_die; | |
5110 | ||
b0aeadb3 DE |
5111 | /* At most one of these may be provided. */ |
5112 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5113 | |
b0c7bfa9 DE |
5114 | /* These attributes aren't processed until later: |
5115 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5116 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5117 | referenced later. However, these attributes are found in the stub | |
5118 | which we won't have later. In order to not impose this complication | |
5119 | on the rest of the code, we read them here and copy them to the | |
5120 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5121 | |
5122 | stmt_list = NULL; | |
5123 | low_pc = NULL; | |
5124 | high_pc = NULL; | |
5125 | ranges = NULL; | |
5126 | comp_dir = NULL; | |
5127 | ||
5128 | if (stub_comp_unit_die != NULL) | |
5129 | { | |
5130 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5131 | DWO file. */ | |
5132 | if (! this_cu->is_debug_types) | |
5133 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5134 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5135 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5136 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5137 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5138 | ||
5139 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5140 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5141 | cu->addr_base = 0; | |
5142 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5143 | if (attr) | |
5144 | cu->addr_base = DW_UNSND (attr); | |
5145 | ||
5146 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5147 | We need the value before we can process DW_AT_ranges. */ | |
5148 | cu->ranges_base = 0; | |
5149 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5150 | if (attr) | |
5151 | cu->ranges_base = DW_UNSND (attr); | |
5152 | } | |
a2ce51a0 DE |
5153 | else if (stub_comp_dir != NULL) |
5154 | { | |
5155 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5156 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5157 | comp_dir->name = DW_AT_comp_dir; |
5158 | comp_dir->form = DW_FORM_string; | |
5159 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5160 | DW_STRING (comp_dir) = stub_comp_dir; | |
5161 | } | |
b0c7bfa9 DE |
5162 | |
5163 | /* Set up for reading the DWO CU/TU. */ | |
5164 | cu->dwo_unit = dwo_unit; | |
5165 | section = dwo_unit->section; | |
5166 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5167 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
5168 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
5169 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
5170 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5171 | ||
5172 | if (this_cu->is_debug_types) | |
5173 | { | |
5174 | ULONGEST header_signature; | |
5175 | cu_offset type_offset_in_tu; | |
5176 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
5177 | ||
5178 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
5179 | dwo_abbrev_section, | |
5180 | info_ptr, | |
5181 | &header_signature, | |
5182 | &type_offset_in_tu); | |
a2ce51a0 DE |
5183 | /* This is not an assert because it can be caused by bad debug info. */ |
5184 | if (sig_type->signature != header_signature) | |
5185 | { | |
5186 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5187 | " TU at offset 0x%x [in module %s]"), | |
5188 | hex_string (sig_type->signature), | |
5189 | hex_string (header_signature), | |
5190 | dwo_unit->offset.sect_off, | |
5191 | bfd_get_filename (abfd)); | |
5192 | } | |
b0c7bfa9 DE |
5193 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
5194 | /* For DWOs coming from DWP files, we don't know the CU length | |
5195 | nor the type's offset in the TU until now. */ | |
5196 | dwo_unit->length = get_cu_length (&cu->header); | |
5197 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
5198 | ||
5199 | /* Establish the type offset that can be used to lookup the type. | |
5200 | For DWO files, we don't know it until now. */ | |
5201 | sig_type->type_offset_in_section.sect_off = | |
5202 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
5203 | } | |
5204 | else | |
5205 | { | |
5206 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5207 | dwo_abbrev_section, | |
5208 | info_ptr, 0); | |
5209 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
5210 | /* For DWOs coming from DWP files, we don't know the CU length | |
5211 | until now. */ | |
5212 | dwo_unit->length = get_cu_length (&cu->header); | |
5213 | } | |
5214 | ||
02142a6c DE |
5215 | /* Replace the CU's original abbrev table with the DWO's. |
5216 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5217 | if (abbrev_table_provided) |
5218 | { | |
5219 | /* Don't free the provided abbrev table, the caller of | |
5220 | init_cutu_and_read_dies owns it. */ | |
5221 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5222 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5223 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5224 | } | |
5225 | else | |
5226 | { | |
5227 | dwarf2_free_abbrev_table (cu); | |
5228 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5229 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5230 | } |
5231 | ||
5232 | /* Read in the die, but leave space to copy over the attributes | |
5233 | from the stub. This has the benefit of simplifying the rest of | |
5234 | the code - all the work to maintain the illusion of a single | |
5235 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5236 | num_extra_attrs = ((stmt_list != NULL) | |
5237 | + (low_pc != NULL) | |
5238 | + (high_pc != NULL) | |
5239 | + (ranges != NULL) | |
5240 | + (comp_dir != NULL)); | |
5241 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5242 | result_has_children, num_extra_attrs); | |
5243 | ||
5244 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5245 | comp_unit_die = *result_comp_unit_die; | |
5246 | i = comp_unit_die->num_attrs; | |
5247 | if (stmt_list != NULL) | |
5248 | comp_unit_die->attrs[i++] = *stmt_list; | |
5249 | if (low_pc != NULL) | |
5250 | comp_unit_die->attrs[i++] = *low_pc; | |
5251 | if (high_pc != NULL) | |
5252 | comp_unit_die->attrs[i++] = *high_pc; | |
5253 | if (ranges != NULL) | |
5254 | comp_unit_die->attrs[i++] = *ranges; | |
5255 | if (comp_dir != NULL) | |
5256 | comp_unit_die->attrs[i++] = *comp_dir; | |
5257 | comp_unit_die->num_attrs += num_extra_attrs; | |
5258 | ||
b4f54984 | 5259 | if (dwarf_die_debug) |
bf6af496 DE |
5260 | { |
5261 | fprintf_unfiltered (gdb_stdlog, | |
5262 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5263 | get_section_name (section), |
bf6af496 DE |
5264 | (unsigned) (begin_info_ptr - section->buffer), |
5265 | bfd_get_filename (abfd)); | |
b4f54984 | 5266 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
5267 | } |
5268 | ||
a2ce51a0 DE |
5269 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5270 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5271 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5272 | to get it via circuitous means. Blech. */ | |
5273 | if (comp_dir != NULL) | |
5274 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5275 | ||
b0c7bfa9 DE |
5276 | /* Skip dummy compilation units. */ |
5277 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5278 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5279 | return 0; | |
5280 | ||
5281 | *result_info_ptr = info_ptr; | |
5282 | return 1; | |
5283 | } | |
5284 | ||
5285 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5286 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5287 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5288 | |
5289 | static struct dwo_unit * | |
5290 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5291 | struct die_info *comp_unit_die) | |
5292 | { | |
5293 | struct dwarf2_cu *cu = this_cu->cu; | |
5294 | struct attribute *attr; | |
5295 | ULONGEST signature; | |
5296 | struct dwo_unit *dwo_unit; | |
5297 | const char *comp_dir, *dwo_name; | |
5298 | ||
a2ce51a0 DE |
5299 | gdb_assert (cu != NULL); |
5300 | ||
b0c7bfa9 | 5301 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
5302 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5303 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
5304 | |
5305 | if (this_cu->is_debug_types) | |
5306 | { | |
5307 | struct signatured_type *sig_type; | |
5308 | ||
5309 | /* Since this_cu is the first member of struct signatured_type, | |
5310 | we can go from a pointer to one to a pointer to the other. */ | |
5311 | sig_type = (struct signatured_type *) this_cu; | |
5312 | signature = sig_type->signature; | |
5313 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5314 | } | |
5315 | else | |
5316 | { | |
5317 | struct attribute *attr; | |
5318 | ||
5319 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5320 | if (! attr) | |
5321 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5322 | " [in module %s]"), | |
4262abfb | 5323 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5324 | signature = DW_UNSND (attr); |
5325 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5326 | signature); | |
5327 | } | |
5328 | ||
b0c7bfa9 DE |
5329 | return dwo_unit; |
5330 | } | |
5331 | ||
a2ce51a0 | 5332 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5333 | See it for a description of the parameters. |
5334 | Read a TU directly from a DWO file, bypassing the stub. | |
5335 | ||
5336 | Note: This function could be a little bit simpler if we shared cleanups | |
5337 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5338 | to do, so we keep this function self-contained. Or we could move this | |
5339 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5340 | |
5341 | static void | |
6aa5f3a6 DE |
5342 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5343 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5344 | die_reader_func_ftype *die_reader_func, |
5345 | void *data) | |
5346 | { | |
5347 | struct dwarf2_cu *cu; | |
5348 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5349 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5350 | struct die_reader_specs reader; |
5351 | const gdb_byte *info_ptr; | |
5352 | struct die_info *comp_unit_die; | |
5353 | int has_children; | |
5354 | ||
5355 | /* Verify we can do the following downcast, and that we have the | |
5356 | data we need. */ | |
5357 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5358 | sig_type = (struct signatured_type *) this_cu; | |
5359 | gdb_assert (sig_type->dwo_unit != NULL); | |
5360 | ||
5361 | cleanups = make_cleanup (null_cleanup, NULL); | |
5362 | ||
6aa5f3a6 DE |
5363 | if (use_existing_cu && this_cu->cu != NULL) |
5364 | { | |
5365 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5366 | cu = this_cu->cu; | |
5367 | /* There's no need to do the rereading_dwo_cu handling that | |
5368 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5369 | } | |
5370 | else | |
5371 | { | |
5372 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5373 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5374 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
5375 | init_one_comp_unit (cu, this_cu); |
5376 | /* If an error occurs while loading, release our storage. */ | |
5377 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5378 | } | |
5379 | ||
5380 | /* A future optimization, if needed, would be to use an existing | |
5381 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5382 | could share abbrev tables. */ | |
a2ce51a0 DE |
5383 | |
5384 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5385 | 0 /* abbrev_table_provided */, | |
5386 | NULL /* stub_comp_unit_die */, | |
5387 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5388 | &reader, &info_ptr, | |
5389 | &comp_unit_die, &has_children) == 0) | |
5390 | { | |
5391 | /* Dummy die. */ | |
5392 | do_cleanups (cleanups); | |
5393 | return; | |
5394 | } | |
5395 | ||
5396 | /* All the "real" work is done here. */ | |
5397 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5398 | ||
6aa5f3a6 | 5399 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5400 | but the alternative is making the latter more complex. |
5401 | This function is only for the special case of using DWO files directly: | |
5402 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5403 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5404 | { |
6aa5f3a6 DE |
5405 | if (keep) |
5406 | { | |
5407 | /* We've successfully allocated this compilation unit. Let our | |
5408 | caller clean it up when finished with it. */ | |
5409 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5410 | |
6aa5f3a6 DE |
5411 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5412 | So we have to manually free the abbrev table. */ | |
5413 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5414 | |
6aa5f3a6 DE |
5415 | /* Link this CU into read_in_chain. */ |
5416 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5417 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5418 | } | |
5419 | else | |
5420 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5421 | } |
a2ce51a0 DE |
5422 | |
5423 | do_cleanups (cleanups); | |
5424 | } | |
5425 | ||
fd820528 | 5426 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5427 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5428 | |
f4dc4d17 DE |
5429 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5430 | Otherwise the table specified in the comp unit header is read in and used. | |
5431 | This is an optimization for when we already have the abbrev table. | |
5432 | ||
dee91e82 DE |
5433 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5434 | Otherwise, a new CU is allocated with xmalloc. | |
5435 | ||
5436 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5437 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5438 | ||
5439 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5440 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5441 | |
70221824 | 5442 | static void |
fd820528 | 5443 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5444 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5445 | int use_existing_cu, int keep, |
5446 | die_reader_func_ftype *die_reader_func, | |
5447 | void *data) | |
c906108c | 5448 | { |
dee91e82 | 5449 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5450 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5451 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5452 | struct dwarf2_cu *cu; |
d521ce57 | 5453 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5454 | struct die_reader_specs reader; |
d85a05f0 | 5455 | struct die_info *comp_unit_die; |
dee91e82 | 5456 | int has_children; |
d85a05f0 | 5457 | struct attribute *attr; |
365156ad | 5458 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5459 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5460 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5461 | /* Non-zero if CU currently points to a DWO file and we need to |
5462 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5463 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5464 | int rereading_dwo_cu = 0; |
c906108c | 5465 | |
b4f54984 | 5466 | if (dwarf_die_debug) |
09406207 DE |
5467 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5468 | this_cu->is_debug_types ? "type" : "comp", | |
5469 | this_cu->offset.sect_off); | |
5470 | ||
dee91e82 DE |
5471 | if (use_existing_cu) |
5472 | gdb_assert (keep); | |
23745b47 | 5473 | |
a2ce51a0 DE |
5474 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5475 | file (instead of going through the stub), short-circuit all of this. */ | |
5476 | if (this_cu->reading_dwo_directly) | |
5477 | { | |
5478 | /* Narrow down the scope of possibilities to have to understand. */ | |
5479 | gdb_assert (this_cu->is_debug_types); | |
5480 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5481 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5482 | die_reader_func, data); | |
a2ce51a0 DE |
5483 | return; |
5484 | } | |
5485 | ||
dee91e82 DE |
5486 | cleanups = make_cleanup (null_cleanup, NULL); |
5487 | ||
5488 | /* This is cheap if the section is already read in. */ | |
5489 | dwarf2_read_section (objfile, section); | |
5490 | ||
5491 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5492 | |
5493 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5494 | |
5495 | if (use_existing_cu && this_cu->cu != NULL) | |
5496 | { | |
5497 | cu = this_cu->cu; | |
42e7ad6c DE |
5498 | /* If this CU is from a DWO file we need to start over, we need to |
5499 | refetch the attributes from the skeleton CU. | |
5500 | This could be optimized by retrieving those attributes from when we | |
5501 | were here the first time: the previous comp_unit_die was stored in | |
5502 | comp_unit_obstack. But there's no data yet that we need this | |
5503 | optimization. */ | |
5504 | if (cu->dwo_unit != NULL) | |
5505 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5506 | } |
5507 | else | |
5508 | { | |
5509 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5510 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5511 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 5512 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 5513 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5514 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5515 | } |
dee91e82 | 5516 | |
b0c7bfa9 | 5517 | /* Get the header. */ |
42e7ad6c DE |
5518 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5519 | { | |
5520 | /* We already have the header, there's no need to read it in again. */ | |
5521 | info_ptr += cu->header.first_die_offset.cu_off; | |
5522 | } | |
5523 | else | |
5524 | { | |
3019eac3 | 5525 | if (this_cu->is_debug_types) |
dee91e82 DE |
5526 | { |
5527 | ULONGEST signature; | |
42e7ad6c | 5528 | cu_offset type_offset_in_tu; |
dee91e82 | 5529 | |
4bdcc0c1 DE |
5530 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5531 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5532 | &signature, |
5533 | &type_offset_in_tu); | |
dee91e82 | 5534 | |
42e7ad6c DE |
5535 | /* Since per_cu is the first member of struct signatured_type, |
5536 | we can go from a pointer to one to a pointer to the other. */ | |
5537 | sig_type = (struct signatured_type *) this_cu; | |
5538 | gdb_assert (sig_type->signature == signature); | |
5539 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5540 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5541 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5542 | ||
42e7ad6c DE |
5543 | /* LENGTH has not been set yet for type units if we're |
5544 | using .gdb_index. */ | |
1ce1cefd | 5545 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5546 | |
5547 | /* Establish the type offset that can be used to lookup the type. */ | |
5548 | sig_type->type_offset_in_section.sect_off = | |
5549 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5550 | } |
5551 | else | |
5552 | { | |
4bdcc0c1 DE |
5553 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5554 | abbrev_section, | |
5555 | info_ptr, 0); | |
dee91e82 DE |
5556 | |
5557 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5558 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5559 | } |
5560 | } | |
10b3939b | 5561 | |
6caca83c | 5562 | /* Skip dummy compilation units. */ |
dee91e82 | 5563 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5564 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5565 | { | |
dee91e82 | 5566 | do_cleanups (cleanups); |
21b2bd31 | 5567 | return; |
6caca83c CC |
5568 | } |
5569 | ||
433df2d4 DE |
5570 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5571 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5572 | done. Note that it's important that if the CU had an abbrev table |
5573 | on entry we don't free it when we're done: Somewhere up the call stack | |
5574 | it may be in use. */ | |
f4dc4d17 DE |
5575 | if (abbrev_table != NULL) |
5576 | { | |
5577 | gdb_assert (cu->abbrev_table == NULL); | |
5578 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5579 | == abbrev_table->offset.sect_off); | |
5580 | cu->abbrev_table = abbrev_table; | |
5581 | } | |
5582 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5583 | { |
4bdcc0c1 | 5584 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5585 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5586 | } | |
42e7ad6c DE |
5587 | else if (rereading_dwo_cu) |
5588 | { | |
5589 | dwarf2_free_abbrev_table (cu); | |
5590 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5591 | } | |
af703f96 | 5592 | |
dee91e82 | 5593 | /* Read the top level CU/TU die. */ |
3019eac3 | 5594 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5595 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5596 | |
b0c7bfa9 DE |
5597 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5598 | from the DWO file. | |
5599 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5600 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5601 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5602 | if (attr) | |
5603 | { | |
3019eac3 | 5604 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5605 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5606 | |
5607 | if (has_children) | |
6a506a2d DE |
5608 | { |
5609 | complaint (&symfile_complaints, | |
5610 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5611 | " has children (offset 0x%x) [in module %s]"), | |
5612 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5613 | } | |
b0c7bfa9 | 5614 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5615 | if (dwo_unit != NULL) |
3019eac3 | 5616 | { |
6a506a2d DE |
5617 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5618 | abbrev_table != NULL, | |
a2ce51a0 | 5619 | comp_unit_die, NULL, |
6a506a2d DE |
5620 | &reader, &info_ptr, |
5621 | &dwo_comp_unit_die, &has_children) == 0) | |
5622 | { | |
5623 | /* Dummy die. */ | |
5624 | do_cleanups (cleanups); | |
5625 | return; | |
5626 | } | |
5627 | comp_unit_die = dwo_comp_unit_die; | |
5628 | } | |
5629 | else | |
5630 | { | |
5631 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5632 | the stub. A complaint has already been logged. There's | |
5633 | not much more we can do except pass on the stub DIE to | |
5634 | die_reader_func. We don't want to throw an error on bad | |
5635 | debug info. */ | |
3019eac3 DE |
5636 | } |
5637 | } | |
5638 | ||
b0c7bfa9 | 5639 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5640 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5641 | ||
b0c7bfa9 | 5642 | /* Done, clean up. */ |
365156ad | 5643 | if (free_cu_cleanup != NULL) |
348e048f | 5644 | { |
365156ad TT |
5645 | if (keep) |
5646 | { | |
5647 | /* We've successfully allocated this compilation unit. Let our | |
5648 | caller clean it up when finished with it. */ | |
5649 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5650 | |
365156ad TT |
5651 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5652 | So we have to manually free the abbrev table. */ | |
5653 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5654 | |
365156ad TT |
5655 | /* Link this CU into read_in_chain. */ |
5656 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5657 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5658 | } | |
5659 | else | |
5660 | do_cleanups (free_cu_cleanup); | |
348e048f | 5661 | } |
365156ad TT |
5662 | |
5663 | do_cleanups (cleanups); | |
dee91e82 DE |
5664 | } |
5665 | ||
33e80786 DE |
5666 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5667 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5668 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5669 | |
5670 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5671 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5672 | |
5673 | We fill in THIS_CU->length. | |
5674 | ||
5675 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5676 | linker) then DIE_READER_FUNC will not get called. | |
5677 | ||
5678 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5679 | This is done in order to not leave THIS_CU->cu in a state where we have |
5680 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5681 | |
5682 | static void | |
5683 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5684 | struct dwo_file *dwo_file, |
dee91e82 DE |
5685 | die_reader_func_ftype *die_reader_func, |
5686 | void *data) | |
5687 | { | |
5688 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5689 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5690 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5691 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5692 | struct dwarf2_cu cu; |
d521ce57 | 5693 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5694 | struct die_reader_specs reader; |
5695 | struct cleanup *cleanups; | |
5696 | struct die_info *comp_unit_die; | |
5697 | int has_children; | |
5698 | ||
b4f54984 | 5699 | if (dwarf_die_debug) |
09406207 DE |
5700 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5701 | this_cu->is_debug_types ? "type" : "comp", | |
5702 | this_cu->offset.sect_off); | |
5703 | ||
dee91e82 DE |
5704 | gdb_assert (this_cu->cu == NULL); |
5705 | ||
33e80786 DE |
5706 | abbrev_section = (dwo_file != NULL |
5707 | ? &dwo_file->sections.abbrev | |
5708 | : get_abbrev_section_for_cu (this_cu)); | |
5709 | ||
dee91e82 DE |
5710 | /* This is cheap if the section is already read in. */ |
5711 | dwarf2_read_section (objfile, section); | |
5712 | ||
5713 | init_one_comp_unit (&cu, this_cu); | |
5714 | ||
5715 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5716 | ||
5717 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5718 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5719 | abbrev_section, info_ptr, | |
3019eac3 | 5720 | this_cu->is_debug_types); |
dee91e82 | 5721 | |
1ce1cefd | 5722 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5723 | |
5724 | /* Skip dummy compilation units. */ | |
5725 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5726 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5727 | { |
dee91e82 | 5728 | do_cleanups (cleanups); |
21b2bd31 | 5729 | return; |
93311388 | 5730 | } |
72bf9492 | 5731 | |
dee91e82 DE |
5732 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5733 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5734 | ||
3019eac3 | 5735 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5736 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5737 | ||
5738 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5739 | ||
5740 | do_cleanups (cleanups); | |
5741 | } | |
5742 | ||
3019eac3 DE |
5743 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5744 | does not lookup the specified DWO file. | |
5745 | This cannot be used to read DWO files. | |
dee91e82 DE |
5746 | |
5747 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5748 | This is done in order to not leave THIS_CU->cu in a state where we have |
5749 | to care whether it refers to the "main" CU or the DWO CU. | |
5750 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5751 | |
5752 | static void | |
5753 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5754 | die_reader_func_ftype *die_reader_func, | |
5755 | void *data) | |
5756 | { | |
33e80786 | 5757 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5758 | } |
0018ea6f DE |
5759 | \f |
5760 | /* Type Unit Groups. | |
dee91e82 | 5761 | |
0018ea6f DE |
5762 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5763 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5764 | so that all types coming from the same compilation (.o file) are grouped | |
5765 | together. A future step could be to put the types in the same symtab as | |
5766 | the CU the types ultimately came from. */ | |
ff013f42 | 5767 | |
f4dc4d17 DE |
5768 | static hashval_t |
5769 | hash_type_unit_group (const void *item) | |
5770 | { | |
9a3c8263 SM |
5771 | const struct type_unit_group *tu_group |
5772 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 5773 | |
094b34ac | 5774 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5775 | } |
348e048f DE |
5776 | |
5777 | static int | |
f4dc4d17 | 5778 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5779 | { |
9a3c8263 SM |
5780 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
5781 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 5782 | |
094b34ac | 5783 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5784 | } |
348e048f | 5785 | |
f4dc4d17 DE |
5786 | /* Allocate a hash table for type unit groups. */ |
5787 | ||
5788 | static htab_t | |
5789 | allocate_type_unit_groups_table (void) | |
5790 | { | |
5791 | return htab_create_alloc_ex (3, | |
5792 | hash_type_unit_group, | |
5793 | eq_type_unit_group, | |
5794 | NULL, | |
5795 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5796 | hashtab_obstack_allocate, | |
5797 | dummy_obstack_deallocate); | |
5798 | } | |
dee91e82 | 5799 | |
f4dc4d17 DE |
5800 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5801 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5802 | of any one psymtab grow too big. */ | |
5803 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5804 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5805 | |
094b34ac | 5806 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5807 | Create the type_unit_group object used to hold one or more TUs. */ |
5808 | ||
5809 | static struct type_unit_group * | |
094b34ac | 5810 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5811 | { |
5812 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5813 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5814 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5815 | |
5816 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5817 | struct type_unit_group); | |
094b34ac | 5818 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5819 | per_cu->objfile = objfile; |
f4dc4d17 | 5820 | |
094b34ac DE |
5821 | if (dwarf2_per_objfile->using_index) |
5822 | { | |
5823 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5824 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5825 | } |
5826 | else | |
5827 | { | |
5828 | unsigned int line_offset = line_offset_struct.sect_off; | |
5829 | struct partial_symtab *pst; | |
5830 | char *name; | |
5831 | ||
5832 | /* Give the symtab a useful name for debug purposes. */ | |
5833 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5834 | name = xstrprintf ("<type_units_%d>", | |
5835 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5836 | else | |
5837 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5838 | ||
5839 | pst = create_partial_symtab (per_cu, name); | |
5840 | pst->anonymous = 1; | |
f4dc4d17 | 5841 | |
094b34ac DE |
5842 | xfree (name); |
5843 | } | |
f4dc4d17 | 5844 | |
094b34ac DE |
5845 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5846 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5847 | |
5848 | return tu_group; | |
5849 | } | |
5850 | ||
094b34ac DE |
5851 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5852 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5853 | |
5854 | static struct type_unit_group * | |
ff39bb5e | 5855 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5856 | { |
5857 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5858 | struct type_unit_group *tu_group; | |
5859 | void **slot; | |
5860 | unsigned int line_offset; | |
5861 | struct type_unit_group type_unit_group_for_lookup; | |
5862 | ||
5863 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5864 | { | |
5865 | dwarf2_per_objfile->type_unit_groups = | |
5866 | allocate_type_unit_groups_table (); | |
5867 | } | |
5868 | ||
5869 | /* Do we need to create a new group, or can we use an existing one? */ | |
5870 | ||
5871 | if (stmt_list) | |
5872 | { | |
5873 | line_offset = DW_UNSND (stmt_list); | |
5874 | ++tu_stats->nr_symtab_sharers; | |
5875 | } | |
5876 | else | |
5877 | { | |
5878 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5879 | We can do various things here like create one group per TU or | |
5880 | spread them over multiple groups to split up the expansion work. | |
5881 | To avoid worst case scenarios (too many groups or too large groups) | |
5882 | we, umm, group them in bunches. */ | |
5883 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5884 | | (tu_stats->nr_stmt_less_type_units | |
5885 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5886 | ++tu_stats->nr_stmt_less_type_units; | |
5887 | } | |
5888 | ||
094b34ac DE |
5889 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5890 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5891 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5892 | &type_unit_group_for_lookup, INSERT); | |
5893 | if (*slot != NULL) | |
5894 | { | |
9a3c8263 | 5895 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
5896 | gdb_assert (tu_group != NULL); |
5897 | } | |
5898 | else | |
5899 | { | |
5900 | sect_offset line_offset_struct; | |
5901 | ||
5902 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5903 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5904 | *slot = tu_group; |
5905 | ++tu_stats->nr_symtabs; | |
5906 | } | |
5907 | ||
5908 | return tu_group; | |
5909 | } | |
0018ea6f DE |
5910 | \f |
5911 | /* Partial symbol tables. */ | |
5912 | ||
5913 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5914 | ||
5915 | The caller must fill in the following details: | |
5916 | dirname, textlow, texthigh. */ | |
5917 | ||
5918 | static struct partial_symtab * | |
5919 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5920 | { | |
5921 | struct objfile *objfile = per_cu->objfile; | |
5922 | struct partial_symtab *pst; | |
5923 | ||
18a94d75 | 5924 | pst = start_psymtab_common (objfile, name, 0, |
0018ea6f DE |
5925 | objfile->global_psymbols.next, |
5926 | objfile->static_psymbols.next); | |
5927 | ||
5928 | pst->psymtabs_addrmap_supported = 1; | |
5929 | ||
5930 | /* This is the glue that links PST into GDB's symbol API. */ | |
5931 | pst->read_symtab_private = per_cu; | |
5932 | pst->read_symtab = dwarf2_read_symtab; | |
5933 | per_cu->v.psymtab = pst; | |
5934 | ||
5935 | return pst; | |
5936 | } | |
5937 | ||
b93601f3 TT |
5938 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5939 | type. */ | |
5940 | ||
5941 | struct process_psymtab_comp_unit_data | |
5942 | { | |
5943 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5944 | ||
5945 | int want_partial_unit; | |
5946 | ||
5947 | /* The "pretend" language that is used if the CU doesn't declare a | |
5948 | language. */ | |
5949 | ||
5950 | enum language pretend_language; | |
5951 | }; | |
5952 | ||
0018ea6f DE |
5953 | /* die_reader_func for process_psymtab_comp_unit. */ |
5954 | ||
5955 | static void | |
5956 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5957 | const gdb_byte *info_ptr, |
0018ea6f DE |
5958 | struct die_info *comp_unit_die, |
5959 | int has_children, | |
5960 | void *data) | |
5961 | { | |
5962 | struct dwarf2_cu *cu = reader->cu; | |
5963 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 5964 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 5965 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
5966 | CORE_ADDR baseaddr; |
5967 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5968 | struct partial_symtab *pst; | |
3a2b436a | 5969 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 5970 | const char *filename; |
9a3c8263 SM |
5971 | struct process_psymtab_comp_unit_data *info |
5972 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 5973 | |
b93601f3 | 5974 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
5975 | return; |
5976 | ||
5977 | gdb_assert (! per_cu->is_debug_types); | |
5978 | ||
b93601f3 | 5979 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
5980 | |
5981 | cu->list_in_scope = &file_symbols; | |
5982 | ||
5983 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
5984 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
5985 | if (filename == NULL) | |
0018ea6f | 5986 | filename = ""; |
0018ea6f DE |
5987 | |
5988 | pst = create_partial_symtab (per_cu, filename); | |
5989 | ||
5990 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 5991 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
5992 | |
5993 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5994 | ||
5995 | dwarf2_find_base_address (comp_unit_die, cu); | |
5996 | ||
5997 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5998 | `DW_AT_ranges'. */ | |
3a2b436a JK |
5999 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6000 | &best_highpc, cu, pst); | |
6001 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6002 | /* Store the contiguous range if it is not empty; it can be empty for |
6003 | CUs with no code. */ | |
6004 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6005 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6006 | best_lowpc + baseaddr), | |
6007 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6008 | best_highpc + baseaddr) - 1, | |
6009 | pst); | |
0018ea6f DE |
6010 | |
6011 | /* Check if comp unit has_children. | |
6012 | If so, read the rest of the partial symbols from this comp unit. | |
6013 | If not, there's no more debug_info for this comp unit. */ | |
6014 | if (has_children) | |
6015 | { | |
6016 | struct partial_die_info *first_die; | |
6017 | CORE_ADDR lowpc, highpc; | |
6018 | ||
6019 | lowpc = ((CORE_ADDR) -1); | |
6020 | highpc = ((CORE_ADDR) 0); | |
6021 | ||
6022 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6023 | ||
6024 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6025 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6026 | |
6027 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6028 | complaints from `maint check'. */ | |
6029 | if (lowpc == ((CORE_ADDR) -1)) | |
6030 | lowpc = highpc; | |
6031 | ||
6032 | /* If the compilation unit didn't have an explicit address range, | |
6033 | then use the information extracted from its child dies. */ | |
e385593e | 6034 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6035 | { |
6036 | best_lowpc = lowpc; | |
6037 | best_highpc = highpc; | |
6038 | } | |
6039 | } | |
3e29f34a MR |
6040 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6041 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6042 | |
8763cede | 6043 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6044 | |
6045 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6046 | { | |
6047 | int i; | |
6048 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6049 | struct dwarf2_per_cu_data *iter; | |
6050 | ||
6051 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6052 | post-pass. */ | |
6053 | pst->number_of_dependencies = len; | |
8d749320 SM |
6054 | pst->dependencies = |
6055 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6056 | for (i = 0; |
6057 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6058 | i, iter); | |
6059 | ++i) | |
6060 | pst->dependencies[i] = iter->v.psymtab; | |
6061 | ||
6062 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6063 | } | |
6064 | ||
6065 | /* Get the list of files included in the current compilation unit, | |
6066 | and build a psymtab for each of them. */ | |
6067 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6068 | ||
b4f54984 | 6069 | if (dwarf_read_debug) |
0018ea6f DE |
6070 | { |
6071 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6072 | ||
6073 | fprintf_unfiltered (gdb_stdlog, | |
6074 | "Psymtab for %s unit @0x%x: %s - %s" | |
6075 | ", %d global, %d static syms\n", | |
6076 | per_cu->is_debug_types ? "type" : "comp", | |
6077 | per_cu->offset.sect_off, | |
6078 | paddress (gdbarch, pst->textlow), | |
6079 | paddress (gdbarch, pst->texthigh), | |
6080 | pst->n_global_syms, pst->n_static_syms); | |
6081 | } | |
6082 | } | |
6083 | ||
6084 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6085 | Process compilation unit THIS_CU for a psymtab. */ | |
6086 | ||
6087 | static void | |
6088 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6089 | int want_partial_unit, |
6090 | enum language pretend_language) | |
0018ea6f | 6091 | { |
b93601f3 TT |
6092 | struct process_psymtab_comp_unit_data info; |
6093 | ||
0018ea6f DE |
6094 | /* If this compilation unit was already read in, free the |
6095 | cached copy in order to read it in again. This is | |
6096 | necessary because we skipped some symbols when we first | |
6097 | read in the compilation unit (see load_partial_dies). | |
6098 | This problem could be avoided, but the benefit is unclear. */ | |
6099 | if (this_cu->cu != NULL) | |
6100 | free_one_cached_comp_unit (this_cu); | |
6101 | ||
6102 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
6103 | info.want_partial_unit = want_partial_unit; |
6104 | info.pretend_language = pretend_language; | |
0018ea6f DE |
6105 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
6106 | process_psymtab_comp_unit_reader, | |
b93601f3 | 6107 | &info); |
0018ea6f DE |
6108 | |
6109 | /* Age out any secondary CUs. */ | |
6110 | age_cached_comp_units (); | |
6111 | } | |
f4dc4d17 DE |
6112 | |
6113 | /* Reader function for build_type_psymtabs. */ | |
6114 | ||
6115 | static void | |
6116 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6117 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6118 | struct die_info *type_unit_die, |
6119 | int has_children, | |
6120 | void *data) | |
6121 | { | |
6122 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6123 | struct dwarf2_cu *cu = reader->cu; | |
6124 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6125 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6126 | struct type_unit_group *tu_group; |
6127 | struct attribute *attr; | |
6128 | struct partial_die_info *first_die; | |
6129 | CORE_ADDR lowpc, highpc; | |
6130 | struct partial_symtab *pst; | |
6131 | ||
6132 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6133 | gdb_assert (per_cu->is_debug_types); |
6134 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6135 | |
6136 | if (! has_children) | |
6137 | return; | |
6138 | ||
6139 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6140 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6141 | |
0186c6a7 | 6142 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6143 | |
6144 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6145 | cu->list_in_scope = &file_symbols; | |
6146 | pst = create_partial_symtab (per_cu, ""); | |
6147 | pst->anonymous = 1; | |
6148 | ||
6149 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6150 | ||
6151 | lowpc = (CORE_ADDR) -1; | |
6152 | highpc = (CORE_ADDR) 0; | |
6153 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6154 | ||
8763cede | 6155 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6156 | } |
6157 | ||
73051182 DE |
6158 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6159 | ||
6160 | struct tu_abbrev_offset | |
6161 | { | |
6162 | struct signatured_type *sig_type; | |
6163 | sect_offset abbrev_offset; | |
6164 | }; | |
6165 | ||
6166 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6167 | ||
6168 | static int | |
6169 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6170 | { | |
9a3c8263 SM |
6171 | const struct tu_abbrev_offset * const *a |
6172 | = (const struct tu_abbrev_offset * const*) ap; | |
6173 | const struct tu_abbrev_offset * const *b | |
6174 | = (const struct tu_abbrev_offset * const*) bp; | |
73051182 DE |
6175 | unsigned int aoff = (*a)->abbrev_offset.sect_off; |
6176 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
6177 | ||
6178 | return (aoff > boff) - (aoff < boff); | |
6179 | } | |
6180 | ||
6181 | /* Efficiently read all the type units. | |
6182 | This does the bulk of the work for build_type_psymtabs. | |
6183 | ||
6184 | The efficiency is because we sort TUs by the abbrev table they use and | |
6185 | only read each abbrev table once. In one program there are 200K TUs | |
6186 | sharing 8K abbrev tables. | |
6187 | ||
6188 | The main purpose of this function is to support building the | |
6189 | dwarf2_per_objfile->type_unit_groups table. | |
6190 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6191 | can collapse the search space by grouping them by stmt_list. | |
6192 | The savings can be significant, in the same program from above the 200K TUs | |
6193 | share 8K stmt_list tables. | |
6194 | ||
6195 | FUNC is expected to call get_type_unit_group, which will create the | |
6196 | struct type_unit_group if necessary and add it to | |
6197 | dwarf2_per_objfile->type_unit_groups. */ | |
6198 | ||
6199 | static void | |
6200 | build_type_psymtabs_1 (void) | |
6201 | { | |
73051182 DE |
6202 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
6203 | struct cleanup *cleanups; | |
6204 | struct abbrev_table *abbrev_table; | |
6205 | sect_offset abbrev_offset; | |
6206 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
6207 | int i; |
6208 | ||
6209 | /* It's up to the caller to not call us multiple times. */ | |
6210 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6211 | ||
6212 | if (dwarf2_per_objfile->n_type_units == 0) | |
6213 | return; | |
6214 | ||
6215 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6216 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6217 | read each abbrev table in. | |
6218 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6219 | This is simpler and efficient enough for now. | |
6220 | ||
6221 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6222 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6223 | stmt_list value too so in practice this should work well. | |
6224 | ||
6225 | The basic algorithm here is: | |
6226 | ||
6227 | sort TUs by abbrev table | |
6228 | for each TU with same abbrev table: | |
6229 | read abbrev table if first user | |
6230 | read TU top level DIE | |
6231 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6232 | call FUNC */ | |
6233 | ||
b4f54984 | 6234 | if (dwarf_read_debug) |
73051182 DE |
6235 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
6236 | ||
6237 | /* Sort in a separate table to maintain the order of all_type_units | |
6238 | for .gdb_index: TU indices directly index all_type_units. */ | |
6239 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6240 | dwarf2_per_objfile->n_type_units); | |
6241 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6242 | { | |
6243 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6244 | ||
6245 | sorted_by_abbrev[i].sig_type = sig_type; | |
6246 | sorted_by_abbrev[i].abbrev_offset = | |
6247 | read_abbrev_offset (sig_type->per_cu.section, | |
6248 | sig_type->per_cu.offset); | |
6249 | } | |
6250 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6251 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6252 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6253 | ||
6254 | abbrev_offset.sect_off = ~(unsigned) 0; | |
6255 | abbrev_table = NULL; | |
6256 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6257 | ||
6258 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6259 | { | |
6260 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6261 | ||
6262 | /* Switch to the next abbrev table if necessary. */ | |
6263 | if (abbrev_table == NULL | |
6264 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
6265 | { | |
6266 | if (abbrev_table != NULL) | |
6267 | { | |
6268 | abbrev_table_free (abbrev_table); | |
6269 | /* Reset to NULL in case abbrev_table_read_table throws | |
6270 | an error: abbrev_table_free_cleanup will get called. */ | |
6271 | abbrev_table = NULL; | |
6272 | } | |
6273 | abbrev_offset = tu->abbrev_offset; | |
6274 | abbrev_table = | |
6275 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6276 | abbrev_offset); | |
6277 | ++tu_stats->nr_uniq_abbrev_tables; | |
6278 | } | |
6279 | ||
6280 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6281 | build_type_psymtabs_reader, NULL); | |
6282 | } | |
6283 | ||
73051182 | 6284 | do_cleanups (cleanups); |
6aa5f3a6 | 6285 | } |
73051182 | 6286 | |
6aa5f3a6 DE |
6287 | /* Print collected type unit statistics. */ |
6288 | ||
6289 | static void | |
6290 | print_tu_stats (void) | |
6291 | { | |
6292 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6293 | ||
6294 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6295 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6296 | dwarf2_per_objfile->n_type_units); | |
6297 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6298 | tu_stats->nr_uniq_abbrev_tables); | |
6299 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6300 | tu_stats->nr_symtabs); | |
6301 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6302 | tu_stats->nr_symtab_sharers); | |
6303 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6304 | tu_stats->nr_stmt_less_type_units); | |
6305 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6306 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6307 | } |
6308 | ||
f4dc4d17 DE |
6309 | /* Traversal function for build_type_psymtabs. */ |
6310 | ||
6311 | static int | |
6312 | build_type_psymtab_dependencies (void **slot, void *info) | |
6313 | { | |
6314 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6315 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6316 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6317 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6318 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6319 | struct signatured_type *iter; | |
f4dc4d17 DE |
6320 | int i; |
6321 | ||
6322 | gdb_assert (len > 0); | |
0186c6a7 | 6323 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6324 | |
6325 | pst->number_of_dependencies = len; | |
8d749320 SM |
6326 | pst->dependencies = |
6327 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 6328 | for (i = 0; |
0186c6a7 | 6329 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6330 | ++i) |
6331 | { | |
0186c6a7 DE |
6332 | gdb_assert (iter->per_cu.is_debug_types); |
6333 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6334 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6335 | } |
6336 | ||
0186c6a7 | 6337 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6338 | |
6339 | return 1; | |
6340 | } | |
6341 | ||
6342 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6343 | Build partial symbol tables for the .debug_types comp-units. */ | |
6344 | ||
6345 | static void | |
6346 | build_type_psymtabs (struct objfile *objfile) | |
6347 | { | |
0e50663e | 6348 | if (! create_all_type_units (objfile)) |
348e048f DE |
6349 | return; |
6350 | ||
73051182 | 6351 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6352 | } |
f4dc4d17 | 6353 | |
6aa5f3a6 DE |
6354 | /* Traversal function for process_skeletonless_type_unit. |
6355 | Read a TU in a DWO file and build partial symbols for it. */ | |
6356 | ||
6357 | static int | |
6358 | process_skeletonless_type_unit (void **slot, void *info) | |
6359 | { | |
6360 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 6361 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
6362 | struct signatured_type find_entry, *entry; |
6363 | ||
6364 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6365 | ||
6366 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6367 | { | |
6368 | dwarf2_per_objfile->signatured_types | |
6369 | = allocate_signatured_type_table (objfile); | |
6370 | } | |
6371 | ||
6372 | find_entry.signature = dwo_unit->signature; | |
6373 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6374 | INSERT); | |
6375 | /* If we've already seen this type there's nothing to do. What's happening | |
6376 | is we're doing our own version of comdat-folding here. */ | |
6377 | if (*slot != NULL) | |
6378 | return 1; | |
6379 | ||
6380 | /* This does the job that create_all_type_units would have done for | |
6381 | this TU. */ | |
6382 | entry = add_type_unit (dwo_unit->signature, slot); | |
6383 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6384 | *slot = entry; | |
6385 | ||
6386 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6387 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6388 | build_type_psymtabs_reader, NULL); | |
6389 | ||
6390 | return 1; | |
6391 | } | |
6392 | ||
6393 | /* Traversal function for process_skeletonless_type_units. */ | |
6394 | ||
6395 | static int | |
6396 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6397 | { | |
6398 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6399 | ||
6400 | if (dwo_file->tus != NULL) | |
6401 | { | |
6402 | htab_traverse_noresize (dwo_file->tus, | |
6403 | process_skeletonless_type_unit, info); | |
6404 | } | |
6405 | ||
6406 | return 1; | |
6407 | } | |
6408 | ||
6409 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6410 | This is needed in case a TU was emitted without its skeleton. | |
6411 | Note: This can't be done until we know what all the DWO files are. */ | |
6412 | ||
6413 | static void | |
6414 | process_skeletonless_type_units (struct objfile *objfile) | |
6415 | { | |
6416 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6417 | if (get_dwp_file () == NULL | |
6418 | && dwarf2_per_objfile->dwo_files != NULL) | |
6419 | { | |
6420 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6421 | process_dwo_file_for_skeletonless_type_units, | |
6422 | objfile); | |
6423 | } | |
348e048f DE |
6424 | } |
6425 | ||
60606b2c TT |
6426 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6427 | ||
6428 | static void | |
6429 | psymtabs_addrmap_cleanup (void *o) | |
6430 | { | |
9a3c8263 | 6431 | struct objfile *objfile = (struct objfile *) o; |
ec61707d | 6432 | |
60606b2c TT |
6433 | objfile->psymtabs_addrmap = NULL; |
6434 | } | |
6435 | ||
95554aad TT |
6436 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6437 | ||
6438 | static void | |
6439 | set_partial_user (struct objfile *objfile) | |
6440 | { | |
6441 | int i; | |
6442 | ||
6443 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6444 | { | |
8832e7e3 | 6445 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6446 | struct partial_symtab *pst = per_cu->v.psymtab; |
6447 | int j; | |
6448 | ||
36586728 TT |
6449 | if (pst == NULL) |
6450 | continue; | |
6451 | ||
95554aad TT |
6452 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6453 | { | |
6454 | /* Set the 'user' field only if it is not already set. */ | |
6455 | if (pst->dependencies[j]->user == NULL) | |
6456 | pst->dependencies[j]->user = pst; | |
6457 | } | |
6458 | } | |
6459 | } | |
6460 | ||
93311388 DE |
6461 | /* Build the partial symbol table by doing a quick pass through the |
6462 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6463 | |
93311388 | 6464 | static void |
c67a9c90 | 6465 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6466 | { |
60606b2c TT |
6467 | struct cleanup *back_to, *addrmap_cleanup; |
6468 | struct obstack temp_obstack; | |
21b2bd31 | 6469 | int i; |
93311388 | 6470 | |
b4f54984 | 6471 | if (dwarf_read_debug) |
45cfd468 DE |
6472 | { |
6473 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6474 | objfile_name (objfile)); |
45cfd468 DE |
6475 | } |
6476 | ||
98bfdba5 PA |
6477 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6478 | ||
be391dca | 6479 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6480 | |
93311388 DE |
6481 | /* Any cached compilation units will be linked by the per-objfile |
6482 | read_in_chain. Make sure to free them when we're done. */ | |
6483 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6484 | |
348e048f DE |
6485 | build_type_psymtabs (objfile); |
6486 | ||
93311388 | 6487 | create_all_comp_units (objfile); |
c906108c | 6488 | |
60606b2c TT |
6489 | /* Create a temporary address map on a temporary obstack. We later |
6490 | copy this to the final obstack. */ | |
6491 | obstack_init (&temp_obstack); | |
6492 | make_cleanup_obstack_free (&temp_obstack); | |
6493 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6494 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6495 | |
21b2bd31 | 6496 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6497 | { |
8832e7e3 | 6498 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6499 | |
b93601f3 | 6500 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6501 | } |
ff013f42 | 6502 | |
6aa5f3a6 DE |
6503 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6504 | process_skeletonless_type_units (objfile); | |
6505 | ||
6506 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6507 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6508 | { | |
6509 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6510 | build_type_psymtab_dependencies, NULL); | |
6511 | } | |
6512 | ||
b4f54984 | 6513 | if (dwarf_read_debug) |
6aa5f3a6 DE |
6514 | print_tu_stats (); |
6515 | ||
95554aad TT |
6516 | set_partial_user (objfile); |
6517 | ||
ff013f42 JK |
6518 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6519 | &objfile->objfile_obstack); | |
60606b2c | 6520 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6521 | |
ae038cb0 | 6522 | do_cleanups (back_to); |
45cfd468 | 6523 | |
b4f54984 | 6524 | if (dwarf_read_debug) |
45cfd468 | 6525 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 6526 | objfile_name (objfile)); |
ae038cb0 DJ |
6527 | } |
6528 | ||
3019eac3 | 6529 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6530 | |
6531 | static void | |
dee91e82 | 6532 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6533 | const gdb_byte *info_ptr, |
dee91e82 DE |
6534 | struct die_info *comp_unit_die, |
6535 | int has_children, | |
6536 | void *data) | |
ae038cb0 | 6537 | { |
dee91e82 | 6538 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6539 | |
95554aad | 6540 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6541 | |
ae038cb0 DJ |
6542 | /* Check if comp unit has_children. |
6543 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6544 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6545 | if (has_children) |
dee91e82 DE |
6546 | load_partial_dies (reader, info_ptr, 0); |
6547 | } | |
98bfdba5 | 6548 | |
dee91e82 DE |
6549 | /* Load the partial DIEs for a secondary CU into memory. |
6550 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6551 | |
dee91e82 DE |
6552 | static void |
6553 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6554 | { | |
f4dc4d17 DE |
6555 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6556 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6557 | } |
6558 | ||
ae038cb0 | 6559 | static void |
36586728 TT |
6560 | read_comp_units_from_section (struct objfile *objfile, |
6561 | struct dwarf2_section_info *section, | |
6562 | unsigned int is_dwz, | |
6563 | int *n_allocated, | |
6564 | int *n_comp_units, | |
6565 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6566 | { |
d521ce57 | 6567 | const gdb_byte *info_ptr; |
a32a8923 | 6568 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6569 | |
b4f54984 | 6570 | if (dwarf_read_debug) |
bf6af496 | 6571 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
6572 | get_section_name (section), |
6573 | get_section_file_name (section)); | |
bf6af496 | 6574 | |
36586728 | 6575 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6576 | |
36586728 | 6577 | info_ptr = section->buffer; |
6e70227d | 6578 | |
36586728 | 6579 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6580 | { |
c764a876 | 6581 | unsigned int length, initial_length_size; |
ae038cb0 | 6582 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6583 | sect_offset offset; |
ae038cb0 | 6584 | |
36586728 | 6585 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6586 | |
6587 | /* Read just enough information to find out where the next | |
6588 | compilation unit is. */ | |
36586728 | 6589 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6590 | |
6591 | /* Save the compilation unit for later lookup. */ | |
8d749320 | 6592 | this_cu = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_cu_data); |
ae038cb0 DJ |
6593 | memset (this_cu, 0, sizeof (*this_cu)); |
6594 | this_cu->offset = offset; | |
c764a876 | 6595 | this_cu->length = length + initial_length_size; |
36586728 | 6596 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6597 | this_cu->objfile = objfile; |
8a0459fd | 6598 | this_cu->section = section; |
ae038cb0 | 6599 | |
36586728 | 6600 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6601 | { |
36586728 | 6602 | *n_allocated *= 2; |
224c3ddb SM |
6603 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
6604 | *all_comp_units, *n_allocated); | |
ae038cb0 | 6605 | } |
36586728 TT |
6606 | (*all_comp_units)[*n_comp_units] = this_cu; |
6607 | ++*n_comp_units; | |
ae038cb0 DJ |
6608 | |
6609 | info_ptr = info_ptr + this_cu->length; | |
6610 | } | |
36586728 TT |
6611 | } |
6612 | ||
6613 | /* Create a list of all compilation units in OBJFILE. | |
6614 | This is only done for -readnow and building partial symtabs. */ | |
6615 | ||
6616 | static void | |
6617 | create_all_comp_units (struct objfile *objfile) | |
6618 | { | |
6619 | int n_allocated; | |
6620 | int n_comp_units; | |
6621 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6622 | struct dwz_file *dwz; |
36586728 TT |
6623 | |
6624 | n_comp_units = 0; | |
6625 | n_allocated = 10; | |
8d749320 | 6626 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 TT |
6627 | |
6628 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6629 | &n_allocated, &n_comp_units, &all_comp_units); | |
6630 | ||
4db1a1dc TT |
6631 | dwz = dwarf2_get_dwz_file (); |
6632 | if (dwz != NULL) | |
6633 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6634 | &n_allocated, &n_comp_units, | |
6635 | &all_comp_units); | |
ae038cb0 | 6636 | |
8d749320 SM |
6637 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
6638 | struct dwarf2_per_cu_data *, | |
6639 | n_comp_units); | |
ae038cb0 DJ |
6640 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
6641 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6642 | xfree (all_comp_units); | |
6643 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6644 | } |
6645 | ||
5734ee8b | 6646 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6647 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6648 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6649 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6650 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6651 | |
72bf9492 DJ |
6652 | static void |
6653 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6654 | CORE_ADDR *highpc, int set_addrmap, |
6655 | struct dwarf2_cu *cu) | |
c906108c | 6656 | { |
72bf9492 | 6657 | struct partial_die_info *pdi; |
c906108c | 6658 | |
91c24f0a DC |
6659 | /* Now, march along the PDI's, descending into ones which have |
6660 | interesting children but skipping the children of the other ones, | |
6661 | until we reach the end of the compilation unit. */ | |
c906108c | 6662 | |
72bf9492 | 6663 | pdi = first_die; |
91c24f0a | 6664 | |
72bf9492 DJ |
6665 | while (pdi != NULL) |
6666 | { | |
6667 | fixup_partial_die (pdi, cu); | |
c906108c | 6668 | |
f55ee35c | 6669 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6670 | children, so we need to look at them. Ditto for anonymous |
6671 | enums. */ | |
933c6fe4 | 6672 | |
72bf9492 | 6673 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6674 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6675 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6676 | { |
72bf9492 | 6677 | switch (pdi->tag) |
c906108c SS |
6678 | { |
6679 | case DW_TAG_subprogram: | |
cdc07690 | 6680 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6681 | break; |
72929c62 | 6682 | case DW_TAG_constant: |
c906108c SS |
6683 | case DW_TAG_variable: |
6684 | case DW_TAG_typedef: | |
91c24f0a | 6685 | case DW_TAG_union_type: |
72bf9492 | 6686 | if (!pdi->is_declaration) |
63d06c5c | 6687 | { |
72bf9492 | 6688 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6689 | } |
6690 | break; | |
c906108c | 6691 | case DW_TAG_class_type: |
680b30c7 | 6692 | case DW_TAG_interface_type: |
c906108c | 6693 | case DW_TAG_structure_type: |
72bf9492 | 6694 | if (!pdi->is_declaration) |
c906108c | 6695 | { |
72bf9492 | 6696 | add_partial_symbol (pdi, cu); |
c906108c SS |
6697 | } |
6698 | break; | |
91c24f0a | 6699 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6700 | if (!pdi->is_declaration) |
6701 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6702 | break; |
6703 | case DW_TAG_base_type: | |
a02abb62 | 6704 | case DW_TAG_subrange_type: |
c906108c | 6705 | /* File scope base type definitions are added to the partial |
c5aa993b | 6706 | symbol table. */ |
72bf9492 | 6707 | add_partial_symbol (pdi, cu); |
c906108c | 6708 | break; |
d9fa45fe | 6709 | case DW_TAG_namespace: |
cdc07690 | 6710 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6711 | break; |
5d7cb8df | 6712 | case DW_TAG_module: |
cdc07690 | 6713 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6714 | break; |
95554aad TT |
6715 | case DW_TAG_imported_unit: |
6716 | { | |
6717 | struct dwarf2_per_cu_data *per_cu; | |
6718 | ||
f4dc4d17 DE |
6719 | /* For now we don't handle imported units in type units. */ |
6720 | if (cu->per_cu->is_debug_types) | |
6721 | { | |
6722 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6723 | " supported in type units [in module %s]"), | |
4262abfb | 6724 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6725 | } |
6726 | ||
95554aad | 6727 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6728 | pdi->is_dwz, |
95554aad TT |
6729 | cu->objfile); |
6730 | ||
6731 | /* Go read the partial unit, if needed. */ | |
6732 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6733 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6734 | |
f4dc4d17 | 6735 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6736 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6737 | } |
6738 | break; | |
74921315 KS |
6739 | case DW_TAG_imported_declaration: |
6740 | add_partial_symbol (pdi, cu); | |
6741 | break; | |
c906108c SS |
6742 | default: |
6743 | break; | |
6744 | } | |
6745 | } | |
6746 | ||
72bf9492 DJ |
6747 | /* If the die has a sibling, skip to the sibling. */ |
6748 | ||
6749 | pdi = pdi->die_sibling; | |
6750 | } | |
6751 | } | |
6752 | ||
6753 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6754 | |
72bf9492 | 6755 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
6756 | name is concatenated with "::" and the partial DIE's name. For |
6757 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
6758 | Enumerators are an exception; they use the scope of their parent |
6759 | enumeration type, i.e. the name of the enumeration type is not | |
6760 | prepended to the enumerator. | |
91c24f0a | 6761 | |
72bf9492 DJ |
6762 | There are two complexities. One is DW_AT_specification; in this |
6763 | case "parent" means the parent of the target of the specification, | |
6764 | instead of the direct parent of the DIE. The other is compilers | |
6765 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6766 | the fully qualified name of structure types from their members' | |
6767 | linkage names. This must be done using the DIE's children rather | |
6768 | than the children of any DW_AT_specification target. We only need | |
6769 | to do this for structures at the top level, i.e. if the target of | |
6770 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6771 | have a parent. */ | |
6772 | ||
6773 | /* Compute the scope prefix associated with PDI's parent, in | |
6774 | compilation unit CU. The result will be allocated on CU's | |
6775 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6776 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6777 | static const char * |
72bf9492 DJ |
6778 | partial_die_parent_scope (struct partial_die_info *pdi, |
6779 | struct dwarf2_cu *cu) | |
6780 | { | |
15d034d0 | 6781 | const char *grandparent_scope; |
72bf9492 | 6782 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6783 | |
72bf9492 DJ |
6784 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6785 | then this means the parent of the specification DIE. */ | |
6786 | ||
6787 | real_pdi = pdi; | |
72bf9492 | 6788 | while (real_pdi->has_specification) |
36586728 TT |
6789 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6790 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6791 | |
6792 | parent = real_pdi->die_parent; | |
6793 | if (parent == NULL) | |
6794 | return NULL; | |
6795 | ||
6796 | if (parent->scope_set) | |
6797 | return parent->scope; | |
6798 | ||
6799 | fixup_partial_die (parent, cu); | |
6800 | ||
10b3939b | 6801 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6802 | |
acebe513 UW |
6803 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6804 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6805 | Work around this problem here. */ | |
6806 | if (cu->language == language_cplus | |
6e70227d | 6807 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6808 | && strcmp (parent->name, "::") == 0 |
6809 | && grandparent_scope == NULL) | |
6810 | { | |
6811 | parent->scope = NULL; | |
6812 | parent->scope_set = 1; | |
6813 | return NULL; | |
6814 | } | |
6815 | ||
9c6c53f7 SA |
6816 | if (pdi->tag == DW_TAG_enumerator) |
6817 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6818 | parent->scope = grandparent_scope; | |
6819 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6820 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6821 | || parent->tag == DW_TAG_structure_type |
6822 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6823 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6824 | || parent->tag == DW_TAG_union_type |
6825 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6826 | { |
6827 | if (grandparent_scope == NULL) | |
6828 | parent->scope = parent->name; | |
6829 | else | |
3e43a32a MS |
6830 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6831 | grandparent_scope, | |
f55ee35c | 6832 | parent->name, 0, cu); |
72bf9492 | 6833 | } |
72bf9492 DJ |
6834 | else |
6835 | { | |
6836 | /* FIXME drow/2004-04-01: What should we be doing with | |
6837 | function-local names? For partial symbols, we should probably be | |
6838 | ignoring them. */ | |
6839 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6840 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6841 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6842 | parent->scope = grandparent_scope; |
c906108c SS |
6843 | } |
6844 | ||
72bf9492 DJ |
6845 | parent->scope_set = 1; |
6846 | return parent->scope; | |
6847 | } | |
6848 | ||
6849 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6850 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6851 | |
72bf9492 DJ |
6852 | static char * |
6853 | partial_die_full_name (struct partial_die_info *pdi, | |
6854 | struct dwarf2_cu *cu) | |
6855 | { | |
15d034d0 | 6856 | const char *parent_scope; |
72bf9492 | 6857 | |
98bfdba5 PA |
6858 | /* If this is a template instantiation, we can not work out the |
6859 | template arguments from partial DIEs. So, unfortunately, we have | |
6860 | to go through the full DIEs. At least any work we do building | |
6861 | types here will be reused if full symbols are loaded later. */ | |
6862 | if (pdi->has_template_arguments) | |
6863 | { | |
6864 | fixup_partial_die (pdi, cu); | |
6865 | ||
6866 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6867 | { | |
6868 | struct die_info *die; | |
6869 | struct attribute attr; | |
6870 | struct dwarf2_cu *ref_cu = cu; | |
6871 | ||
b64f50a1 | 6872 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 6873 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 6874 | attr.form = DW_FORM_ref_addr; |
4568ecf9 | 6875 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6876 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6877 | ||
6878 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6879 | } | |
6880 | } | |
6881 | ||
72bf9492 DJ |
6882 | parent_scope = partial_die_parent_scope (pdi, cu); |
6883 | if (parent_scope == NULL) | |
6884 | return NULL; | |
6885 | else | |
f55ee35c | 6886 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6887 | } |
6888 | ||
6889 | static void | |
72bf9492 | 6890 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6891 | { |
e7c27a73 | 6892 | struct objfile *objfile = cu->objfile; |
3e29f34a | 6893 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 6894 | CORE_ADDR addr = 0; |
15d034d0 | 6895 | const char *actual_name = NULL; |
e142c38c | 6896 | CORE_ADDR baseaddr; |
15d034d0 | 6897 | char *built_actual_name; |
e142c38c DJ |
6898 | |
6899 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6900 | |
15d034d0 TT |
6901 | built_actual_name = partial_die_full_name (pdi, cu); |
6902 | if (built_actual_name != NULL) | |
6903 | actual_name = built_actual_name; | |
63d06c5c | 6904 | |
72bf9492 DJ |
6905 | if (actual_name == NULL) |
6906 | actual_name = pdi->name; | |
6907 | ||
c906108c SS |
6908 | switch (pdi->tag) |
6909 | { | |
6910 | case DW_TAG_subprogram: | |
3e29f34a | 6911 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 6912 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6913 | { |
2cfa0c8d JB |
6914 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6915 | of the global scope. But in Ada, we want to be able to access | |
6916 | nested procedures globally. So all Ada subprograms are stored | |
6917 | in the global scope. */ | |
f47fb265 | 6918 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6919 | built_actual_name != NULL, |
f47fb265 MS |
6920 | VAR_DOMAIN, LOC_BLOCK, |
6921 | &objfile->global_psymbols, | |
1762568f | 6922 | addr, cu->language, objfile); |
c906108c SS |
6923 | } |
6924 | else | |
6925 | { | |
f47fb265 | 6926 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6927 | built_actual_name != NULL, |
f47fb265 MS |
6928 | VAR_DOMAIN, LOC_BLOCK, |
6929 | &objfile->static_psymbols, | |
1762568f | 6930 | addr, cu->language, objfile); |
c906108c SS |
6931 | } |
6932 | break; | |
72929c62 JB |
6933 | case DW_TAG_constant: |
6934 | { | |
6935 | struct psymbol_allocation_list *list; | |
6936 | ||
6937 | if (pdi->is_external) | |
6938 | list = &objfile->global_psymbols; | |
6939 | else | |
6940 | list = &objfile->static_psymbols; | |
f47fb265 | 6941 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6942 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 6943 | list, 0, cu->language, objfile); |
72929c62 JB |
6944 | } |
6945 | break; | |
c906108c | 6946 | case DW_TAG_variable: |
95554aad TT |
6947 | if (pdi->d.locdesc) |
6948 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6949 | |
95554aad | 6950 | if (pdi->d.locdesc |
caac4577 JG |
6951 | && addr == 0 |
6952 | && !dwarf2_per_objfile->has_section_at_zero) | |
6953 | { | |
6954 | /* A global or static variable may also have been stripped | |
6955 | out by the linker if unused, in which case its address | |
6956 | will be nullified; do not add such variables into partial | |
6957 | symbol table then. */ | |
6958 | } | |
6959 | else if (pdi->is_external) | |
c906108c SS |
6960 | { |
6961 | /* Global Variable. | |
6962 | Don't enter into the minimal symbol tables as there is | |
6963 | a minimal symbol table entry from the ELF symbols already. | |
6964 | Enter into partial symbol table if it has a location | |
6965 | descriptor or a type. | |
6966 | If the location descriptor is missing, new_symbol will create | |
6967 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6968 | be determined from the minimal symbol table whenever the variable | |
6969 | is referenced. | |
6970 | The address for the partial symbol table entry is not | |
6971 | used by GDB, but it comes in handy for debugging partial symbol | |
6972 | table building. */ | |
6973 | ||
95554aad | 6974 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6975 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6976 | built_actual_name != NULL, |
f47fb265 MS |
6977 | VAR_DOMAIN, LOC_STATIC, |
6978 | &objfile->global_psymbols, | |
1762568f | 6979 | addr + baseaddr, |
f47fb265 | 6980 | cu->language, objfile); |
c906108c SS |
6981 | } |
6982 | else | |
6983 | { | |
ff908ebf AW |
6984 | int has_loc = pdi->d.locdesc != NULL; |
6985 | ||
6986 | /* Static Variable. Skip symbols whose value we cannot know (those | |
6987 | without location descriptors or constant values). */ | |
6988 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 6989 | { |
15d034d0 | 6990 | xfree (built_actual_name); |
decbce07 MS |
6991 | return; |
6992 | } | |
ff908ebf | 6993 | |
f47fb265 | 6994 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6995 | built_actual_name != NULL, |
f47fb265 MS |
6996 | VAR_DOMAIN, LOC_STATIC, |
6997 | &objfile->static_psymbols, | |
ff908ebf | 6998 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 6999 | cu->language, objfile); |
c906108c SS |
7000 | } |
7001 | break; | |
7002 | case DW_TAG_typedef: | |
7003 | case DW_TAG_base_type: | |
a02abb62 | 7004 | case DW_TAG_subrange_type: |
38d518c9 | 7005 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7006 | built_actual_name != NULL, |
176620f1 | 7007 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7008 | &objfile->static_psymbols, |
1762568f | 7009 | 0, cu->language, objfile); |
c906108c | 7010 | break; |
74921315 | 7011 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7012 | case DW_TAG_namespace: |
7013 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7014 | built_actual_name != NULL, |
72bf9492 DJ |
7015 | VAR_DOMAIN, LOC_TYPEDEF, |
7016 | &objfile->global_psymbols, | |
1762568f | 7017 | 0, cu->language, objfile); |
72bf9492 | 7018 | break; |
530e8392 KB |
7019 | case DW_TAG_module: |
7020 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7021 | built_actual_name != NULL, | |
7022 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7023 | &objfile->global_psymbols, | |
1762568f | 7024 | 0, cu->language, objfile); |
530e8392 | 7025 | break; |
c906108c | 7026 | case DW_TAG_class_type: |
680b30c7 | 7027 | case DW_TAG_interface_type: |
c906108c SS |
7028 | case DW_TAG_structure_type: |
7029 | case DW_TAG_union_type: | |
7030 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7031 | /* Skip external references. The DWARF standard says in the section |
7032 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7033 | structure, union or class type is represented by a structure, | |
7034 | union or class entry that does not have a byte size attribute | |
7035 | and that has a DW_AT_declaration attribute." */ | |
7036 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7037 | { |
15d034d0 | 7038 | xfree (built_actual_name); |
decbce07 MS |
7039 | return; |
7040 | } | |
fa4028e9 | 7041 | |
63d06c5c DC |
7042 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7043 | static vs. global. */ | |
38d518c9 | 7044 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7045 | built_actual_name != NULL, |
176620f1 | 7046 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
7047 | (cu->language == language_cplus |
7048 | || cu->language == language_java) | |
63d06c5c DC |
7049 | ? &objfile->global_psymbols |
7050 | : &objfile->static_psymbols, | |
1762568f | 7051 | 0, cu->language, objfile); |
c906108c | 7052 | |
c906108c SS |
7053 | break; |
7054 | case DW_TAG_enumerator: | |
38d518c9 | 7055 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7056 | built_actual_name != NULL, |
176620f1 | 7057 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
7058 | (cu->language == language_cplus |
7059 | || cu->language == language_java) | |
f6fe98ef DJ |
7060 | ? &objfile->global_psymbols |
7061 | : &objfile->static_psymbols, | |
1762568f | 7062 | 0, cu->language, objfile); |
c906108c SS |
7063 | break; |
7064 | default: | |
7065 | break; | |
7066 | } | |
5c4e30ca | 7067 | |
15d034d0 | 7068 | xfree (built_actual_name); |
c906108c SS |
7069 | } |
7070 | ||
5c4e30ca DC |
7071 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7072 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7073 | the name of the enclosing namespace. */ | |
91c24f0a | 7074 | |
72bf9492 DJ |
7075 | static void |
7076 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7077 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7078 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7079 | { |
72bf9492 | 7080 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7081 | |
72bf9492 | 7082 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7083 | |
7084 | /* Now scan partial symbols in that namespace. */ | |
7085 | ||
91c24f0a | 7086 | if (pdi->has_children) |
cdc07690 | 7087 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7088 | } |
7089 | ||
5d7cb8df JK |
7090 | /* Read a partial die corresponding to a Fortran module. */ |
7091 | ||
7092 | static void | |
7093 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7094 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7095 | { |
530e8392 KB |
7096 | /* Add a symbol for the namespace. */ |
7097 | ||
7098 | add_partial_symbol (pdi, cu); | |
7099 | ||
f55ee35c | 7100 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7101 | |
7102 | if (pdi->has_children) | |
cdc07690 | 7103 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7104 | } |
7105 | ||
bc30ff58 JB |
7106 | /* Read a partial die corresponding to a subprogram and create a partial |
7107 | symbol for that subprogram. When the CU language allows it, this | |
7108 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7109 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7110 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7111 | and highest PC values found in PDI. | |
6e70227d | 7112 | |
cdc07690 YQ |
7113 | PDI may also be a lexical block, in which case we simply search |
7114 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7115 | Again, this is only performed when the CU language allows this |
7116 | type of definitions. */ | |
7117 | ||
7118 | static void | |
7119 | add_partial_subprogram (struct partial_die_info *pdi, | |
7120 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7121 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7122 | { |
7123 | if (pdi->tag == DW_TAG_subprogram) | |
7124 | { | |
7125 | if (pdi->has_pc_info) | |
7126 | { | |
7127 | if (pdi->lowpc < *lowpc) | |
7128 | *lowpc = pdi->lowpc; | |
7129 | if (pdi->highpc > *highpc) | |
7130 | *highpc = pdi->highpc; | |
cdc07690 | 7131 | if (set_addrmap) |
5734ee8b | 7132 | { |
5734ee8b | 7133 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7134 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7135 | CORE_ADDR baseaddr; | |
7136 | CORE_ADDR highpc; | |
7137 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7138 | |
7139 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7140 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7141 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7142 | pdi->lowpc + baseaddr); | |
7143 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7144 | pdi->highpc + baseaddr); | |
7145 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7146 | cu->per_cu->v.psymtab); |
5734ee8b | 7147 | } |
481860b3 GB |
7148 | } |
7149 | ||
7150 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7151 | { | |
bc30ff58 | 7152 | if (!pdi->is_declaration) |
e8d05480 JB |
7153 | /* Ignore subprogram DIEs that do not have a name, they are |
7154 | illegal. Do not emit a complaint at this point, we will | |
7155 | do so when we convert this psymtab into a symtab. */ | |
7156 | if (pdi->name) | |
7157 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7158 | } |
7159 | } | |
6e70227d | 7160 | |
bc30ff58 JB |
7161 | if (! pdi->has_children) |
7162 | return; | |
7163 | ||
7164 | if (cu->language == language_ada) | |
7165 | { | |
7166 | pdi = pdi->die_child; | |
7167 | while (pdi != NULL) | |
7168 | { | |
7169 | fixup_partial_die (pdi, cu); | |
7170 | if (pdi->tag == DW_TAG_subprogram | |
7171 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7172 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7173 | pdi = pdi->die_sibling; |
7174 | } | |
7175 | } | |
7176 | } | |
7177 | ||
91c24f0a DC |
7178 | /* Read a partial die corresponding to an enumeration type. */ |
7179 | ||
72bf9492 DJ |
7180 | static void |
7181 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7182 | struct dwarf2_cu *cu) | |
91c24f0a | 7183 | { |
72bf9492 | 7184 | struct partial_die_info *pdi; |
91c24f0a DC |
7185 | |
7186 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7187 | add_partial_symbol (enum_pdi, cu); |
7188 | ||
7189 | pdi = enum_pdi->die_child; | |
7190 | while (pdi) | |
91c24f0a | 7191 | { |
72bf9492 | 7192 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7193 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7194 | else |
72bf9492 DJ |
7195 | add_partial_symbol (pdi, cu); |
7196 | pdi = pdi->die_sibling; | |
91c24f0a | 7197 | } |
91c24f0a DC |
7198 | } |
7199 | ||
6caca83c CC |
7200 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7201 | ||
7202 | static unsigned int | |
d521ce57 | 7203 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7204 | { |
7205 | unsigned int bytes_read; | |
7206 | ||
7207 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7208 | } | |
7209 | ||
4bb7a0a7 DJ |
7210 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7211 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7212 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7213 | the initial number. */ | |
7214 | ||
7215 | static struct abbrev_info * | |
d521ce57 | 7216 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7217 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7218 | { |
7219 | bfd *abfd = cu->objfile->obfd; | |
7220 | unsigned int abbrev_number; | |
7221 | struct abbrev_info *abbrev; | |
7222 | ||
7223 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7224 | ||
7225 | if (abbrev_number == 0) | |
7226 | return NULL; | |
7227 | ||
433df2d4 | 7228 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7229 | if (!abbrev) |
7230 | { | |
422b9917 DE |
7231 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
7232 | " at offset 0x%x [in module %s]"), | |
7233 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
7234 | cu->header.offset.sect_off, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
7235 | } |
7236 | ||
7237 | return abbrev; | |
7238 | } | |
7239 | ||
93311388 DE |
7240 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7241 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7242 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7243 | ||
d521ce57 TT |
7244 | static const gdb_byte * |
7245 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7246 | { |
dee91e82 | 7247 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7248 | struct abbrev_info *abbrev; |
7249 | unsigned int bytes_read; | |
7250 | ||
7251 | while (1) | |
7252 | { | |
7253 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7254 | if (abbrev == NULL) | |
7255 | return info_ptr + bytes_read; | |
7256 | else | |
dee91e82 | 7257 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7258 | } |
7259 | } | |
7260 | ||
93311388 DE |
7261 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7262 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7263 | abbrev corresponding to that skipped uleb128 should be passed in |
7264 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7265 | children. */ | |
7266 | ||
d521ce57 TT |
7267 | static const gdb_byte * |
7268 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7269 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7270 | { |
7271 | unsigned int bytes_read; | |
7272 | struct attribute attr; | |
dee91e82 DE |
7273 | bfd *abfd = reader->abfd; |
7274 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7275 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7276 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
7277 | unsigned int form, i; |
7278 | ||
7279 | for (i = 0; i < abbrev->num_attrs; i++) | |
7280 | { | |
7281 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7282 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7283 | { | |
dee91e82 | 7284 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7285 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7286 | complaint (&symfile_complaints, |
7287 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7288 | else |
b9502d3f WN |
7289 | { |
7290 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
7291 | const gdb_byte *sibling_ptr = buffer + off; | |
7292 | ||
7293 | if (sibling_ptr < info_ptr) | |
7294 | complaint (&symfile_complaints, | |
7295 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7296 | else if (sibling_ptr > reader->buffer_end) |
7297 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7298 | else |
7299 | return sibling_ptr; | |
7300 | } | |
4bb7a0a7 DJ |
7301 | } |
7302 | ||
7303 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7304 | form = abbrev->attrs[i].form; | |
7305 | skip_attribute: | |
7306 | switch (form) | |
7307 | { | |
4bb7a0a7 | 7308 | case DW_FORM_ref_addr: |
ae411497 TT |
7309 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7310 | and later it is offset sized. */ | |
7311 | if (cu->header.version == 2) | |
7312 | info_ptr += cu->header.addr_size; | |
7313 | else | |
7314 | info_ptr += cu->header.offset_size; | |
7315 | break; | |
36586728 TT |
7316 | case DW_FORM_GNU_ref_alt: |
7317 | info_ptr += cu->header.offset_size; | |
7318 | break; | |
ae411497 | 7319 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7320 | info_ptr += cu->header.addr_size; |
7321 | break; | |
7322 | case DW_FORM_data1: | |
7323 | case DW_FORM_ref1: | |
7324 | case DW_FORM_flag: | |
7325 | info_ptr += 1; | |
7326 | break; | |
2dc7f7b3 TT |
7327 | case DW_FORM_flag_present: |
7328 | break; | |
4bb7a0a7 DJ |
7329 | case DW_FORM_data2: |
7330 | case DW_FORM_ref2: | |
7331 | info_ptr += 2; | |
7332 | break; | |
7333 | case DW_FORM_data4: | |
7334 | case DW_FORM_ref4: | |
7335 | info_ptr += 4; | |
7336 | break; | |
7337 | case DW_FORM_data8: | |
7338 | case DW_FORM_ref8: | |
55f1336d | 7339 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7340 | info_ptr += 8; |
7341 | break; | |
7342 | case DW_FORM_string: | |
9b1c24c8 | 7343 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7344 | info_ptr += bytes_read; |
7345 | break; | |
2dc7f7b3 | 7346 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7347 | case DW_FORM_strp: |
36586728 | 7348 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7349 | info_ptr += cu->header.offset_size; |
7350 | break; | |
2dc7f7b3 | 7351 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7352 | case DW_FORM_block: |
7353 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7354 | info_ptr += bytes_read; | |
7355 | break; | |
7356 | case DW_FORM_block1: | |
7357 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7358 | break; | |
7359 | case DW_FORM_block2: | |
7360 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7361 | break; | |
7362 | case DW_FORM_block4: | |
7363 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7364 | break; | |
7365 | case DW_FORM_sdata: | |
7366 | case DW_FORM_udata: | |
7367 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7368 | case DW_FORM_GNU_addr_index: |
7369 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7370 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7371 | break; |
7372 | case DW_FORM_indirect: | |
7373 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7374 | info_ptr += bytes_read; | |
7375 | /* We need to continue parsing from here, so just go back to | |
7376 | the top. */ | |
7377 | goto skip_attribute; | |
7378 | ||
7379 | default: | |
3e43a32a MS |
7380 | error (_("Dwarf Error: Cannot handle %s " |
7381 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7382 | dwarf_form_name (form), |
7383 | bfd_get_filename (abfd)); | |
7384 | } | |
7385 | } | |
7386 | ||
7387 | if (abbrev->has_children) | |
dee91e82 | 7388 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7389 | else |
7390 | return info_ptr; | |
7391 | } | |
7392 | ||
93311388 | 7393 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7394 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7395 | |
d521ce57 | 7396 | static const gdb_byte * |
dee91e82 DE |
7397 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7398 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7399 | const gdb_byte *info_ptr) |
91c24f0a DC |
7400 | { |
7401 | /* Do we know the sibling already? */ | |
72bf9492 | 7402 | |
91c24f0a DC |
7403 | if (orig_pdi->sibling) |
7404 | return orig_pdi->sibling; | |
7405 | ||
7406 | /* Are there any children to deal with? */ | |
7407 | ||
7408 | if (!orig_pdi->has_children) | |
7409 | return info_ptr; | |
7410 | ||
4bb7a0a7 | 7411 | /* Skip the children the long way. */ |
91c24f0a | 7412 | |
dee91e82 | 7413 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7414 | } |
7415 | ||
257e7a09 | 7416 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7417 | not NULL. */ |
c906108c SS |
7418 | |
7419 | static void | |
257e7a09 YQ |
7420 | dwarf2_read_symtab (struct partial_symtab *self, |
7421 | struct objfile *objfile) | |
c906108c | 7422 | { |
257e7a09 | 7423 | if (self->readin) |
c906108c | 7424 | { |
442e4d9c | 7425 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7426 | self->filename); |
442e4d9c YQ |
7427 | } |
7428 | else | |
7429 | { | |
7430 | if (info_verbose) | |
c906108c | 7431 | { |
442e4d9c | 7432 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7433 | self->filename); |
442e4d9c | 7434 | gdb_flush (gdb_stdout); |
c906108c | 7435 | } |
c906108c | 7436 | |
442e4d9c | 7437 | /* Restore our global data. */ |
9a3c8263 SM |
7438 | dwarf2_per_objfile |
7439 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
7440 | dwarf2_objfile_data_key); | |
10b3939b | 7441 | |
442e4d9c YQ |
7442 | /* If this psymtab is constructed from a debug-only objfile, the |
7443 | has_section_at_zero flag will not necessarily be correct. We | |
7444 | can get the correct value for this flag by looking at the data | |
7445 | associated with the (presumably stripped) associated objfile. */ | |
7446 | if (objfile->separate_debug_objfile_backlink) | |
7447 | { | |
7448 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
7449 | = ((struct dwarf2_per_objfile *) |
7450 | objfile_data (objfile->separate_debug_objfile_backlink, | |
7451 | dwarf2_objfile_data_key)); | |
9a619af0 | 7452 | |
442e4d9c YQ |
7453 | dwarf2_per_objfile->has_section_at_zero |
7454 | = dpo_backlink->has_section_at_zero; | |
7455 | } | |
b2ab525c | 7456 | |
442e4d9c | 7457 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7458 | |
257e7a09 | 7459 | psymtab_to_symtab_1 (self); |
c906108c | 7460 | |
442e4d9c YQ |
7461 | /* Finish up the debug error message. */ |
7462 | if (info_verbose) | |
7463 | printf_filtered (_("done.\n")); | |
c906108c | 7464 | } |
95554aad TT |
7465 | |
7466 | process_cu_includes (); | |
c906108c | 7467 | } |
9cdd5dbd DE |
7468 | \f |
7469 | /* Reading in full CUs. */ | |
c906108c | 7470 | |
10b3939b DJ |
7471 | /* Add PER_CU to the queue. */ |
7472 | ||
7473 | static void | |
95554aad TT |
7474 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7475 | enum language pretend_language) | |
10b3939b DJ |
7476 | { |
7477 | struct dwarf2_queue_item *item; | |
7478 | ||
7479 | per_cu->queued = 1; | |
8d749320 | 7480 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 7481 | item->per_cu = per_cu; |
95554aad | 7482 | item->pretend_language = pretend_language; |
10b3939b DJ |
7483 | item->next = NULL; |
7484 | ||
7485 | if (dwarf2_queue == NULL) | |
7486 | dwarf2_queue = item; | |
7487 | else | |
7488 | dwarf2_queue_tail->next = item; | |
7489 | ||
7490 | dwarf2_queue_tail = item; | |
7491 | } | |
7492 | ||
89e63ee4 DE |
7493 | /* If PER_CU is not yet queued, add it to the queue. |
7494 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7495 | dependency. | |
0907af0c | 7496 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7497 | meaning either PER_CU is already queued or it is already loaded. |
7498 | ||
7499 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7500 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7501 | |
7502 | static int | |
89e63ee4 | 7503 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7504 | struct dwarf2_per_cu_data *per_cu, |
7505 | enum language pretend_language) | |
7506 | { | |
7507 | /* We may arrive here during partial symbol reading, if we need full | |
7508 | DIEs to process an unusual case (e.g. template arguments). Do | |
7509 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7510 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7511 | { | |
7512 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7513 | return 1; | |
7514 | return 0; | |
7515 | } | |
7516 | ||
7517 | /* Mark the dependence relation so that we don't flush PER_CU | |
7518 | too early. */ | |
89e63ee4 DE |
7519 | if (dependent_cu != NULL) |
7520 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7521 | |
7522 | /* If it's already on the queue, we have nothing to do. */ | |
7523 | if (per_cu->queued) | |
7524 | return 0; | |
7525 | ||
7526 | /* If the compilation unit is already loaded, just mark it as | |
7527 | used. */ | |
7528 | if (per_cu->cu != NULL) | |
7529 | { | |
7530 | per_cu->cu->last_used = 0; | |
7531 | return 0; | |
7532 | } | |
7533 | ||
7534 | /* Add it to the queue. */ | |
7535 | queue_comp_unit (per_cu, pretend_language); | |
7536 | ||
7537 | return 1; | |
7538 | } | |
7539 | ||
10b3939b DJ |
7540 | /* Process the queue. */ |
7541 | ||
7542 | static void | |
a0f42c21 | 7543 | process_queue (void) |
10b3939b DJ |
7544 | { |
7545 | struct dwarf2_queue_item *item, *next_item; | |
7546 | ||
b4f54984 | 7547 | if (dwarf_read_debug) |
45cfd468 DE |
7548 | { |
7549 | fprintf_unfiltered (gdb_stdlog, | |
7550 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7551 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7552 | } |
7553 | ||
03dd20cc DJ |
7554 | /* The queue starts out with one item, but following a DIE reference |
7555 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7556 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7557 | { | |
cc12ce38 DE |
7558 | if ((dwarf2_per_objfile->using_index |
7559 | ? !item->per_cu->v.quick->compunit_symtab | |
7560 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
7561 | /* Skip dummy CUs. */ | |
7562 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
7563 | { |
7564 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7565 | unsigned int debug_print_threshold; |
247f5c4f | 7566 | char buf[100]; |
f4dc4d17 | 7567 | |
247f5c4f | 7568 | if (per_cu->is_debug_types) |
f4dc4d17 | 7569 | { |
247f5c4f DE |
7570 | struct signatured_type *sig_type = |
7571 | (struct signatured_type *) per_cu; | |
7572 | ||
7573 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 DE |
7574 | hex_string (sig_type->signature), |
7575 | per_cu->offset.sect_off); | |
7576 | /* There can be 100s of TUs. | |
7577 | Only print them in verbose mode. */ | |
7578 | debug_print_threshold = 2; | |
f4dc4d17 | 7579 | } |
247f5c4f | 7580 | else |
73be47f5 DE |
7581 | { |
7582 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7583 | debug_print_threshold = 1; | |
7584 | } | |
247f5c4f | 7585 | |
b4f54984 | 7586 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7587 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7588 | |
7589 | if (per_cu->is_debug_types) | |
7590 | process_full_type_unit (per_cu, item->pretend_language); | |
7591 | else | |
7592 | process_full_comp_unit (per_cu, item->pretend_language); | |
7593 | ||
b4f54984 | 7594 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7595 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7596 | } |
10b3939b DJ |
7597 | |
7598 | item->per_cu->queued = 0; | |
7599 | next_item = item->next; | |
7600 | xfree (item); | |
7601 | } | |
7602 | ||
7603 | dwarf2_queue_tail = NULL; | |
45cfd468 | 7604 | |
b4f54984 | 7605 | if (dwarf_read_debug) |
45cfd468 DE |
7606 | { |
7607 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7608 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7609 | } |
10b3939b DJ |
7610 | } |
7611 | ||
7612 | /* Free all allocated queue entries. This function only releases anything if | |
7613 | an error was thrown; if the queue was processed then it would have been | |
7614 | freed as we went along. */ | |
7615 | ||
7616 | static void | |
7617 | dwarf2_release_queue (void *dummy) | |
7618 | { | |
7619 | struct dwarf2_queue_item *item, *last; | |
7620 | ||
7621 | item = dwarf2_queue; | |
7622 | while (item) | |
7623 | { | |
7624 | /* Anything still marked queued is likely to be in an | |
7625 | inconsistent state, so discard it. */ | |
7626 | if (item->per_cu->queued) | |
7627 | { | |
7628 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7629 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7630 | item->per_cu->queued = 0; |
7631 | } | |
7632 | ||
7633 | last = item; | |
7634 | item = item->next; | |
7635 | xfree (last); | |
7636 | } | |
7637 | ||
7638 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7639 | } | |
7640 | ||
7641 | /* Read in full symbols for PST, and anything it depends on. */ | |
7642 | ||
c906108c | 7643 | static void |
fba45db2 | 7644 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7645 | { |
10b3939b | 7646 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7647 | int i; |
7648 | ||
95554aad TT |
7649 | if (pst->readin) |
7650 | return; | |
7651 | ||
aaa75496 | 7652 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7653 | if (!pst->dependencies[i]->readin |
7654 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7655 | { |
7656 | /* Inform about additional files that need to be read in. */ | |
7657 | if (info_verbose) | |
7658 | { | |
a3f17187 | 7659 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7660 | fputs_filtered (" ", gdb_stdout); |
7661 | wrap_here (""); | |
7662 | fputs_filtered ("and ", gdb_stdout); | |
7663 | wrap_here (""); | |
7664 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7665 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7666 | gdb_flush (gdb_stdout); |
7667 | } | |
7668 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7669 | } | |
7670 | ||
9a3c8263 | 7671 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
7672 | |
7673 | if (per_cu == NULL) | |
aaa75496 JB |
7674 | { |
7675 | /* It's an include file, no symbols to read for it. | |
7676 | Everything is in the parent symtab. */ | |
7677 | pst->readin = 1; | |
7678 | return; | |
7679 | } | |
c906108c | 7680 | |
a0f42c21 | 7681 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7682 | } |
7683 | ||
dee91e82 DE |
7684 | /* Trivial hash function for die_info: the hash value of a DIE |
7685 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7686 | |
dee91e82 DE |
7687 | static hashval_t |
7688 | die_hash (const void *item) | |
10b3939b | 7689 | { |
9a3c8263 | 7690 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 7691 | |
dee91e82 DE |
7692 | return die->offset.sect_off; |
7693 | } | |
63d06c5c | 7694 | |
dee91e82 DE |
7695 | /* Trivial comparison function for die_info structures: two DIEs |
7696 | are equal if they have the same offset. */ | |
98bfdba5 | 7697 | |
dee91e82 DE |
7698 | static int |
7699 | die_eq (const void *item_lhs, const void *item_rhs) | |
7700 | { | |
9a3c8263 SM |
7701 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
7702 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 7703 | |
dee91e82 DE |
7704 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7705 | } | |
c906108c | 7706 | |
dee91e82 DE |
7707 | /* die_reader_func for load_full_comp_unit. |
7708 | This is identical to read_signatured_type_reader, | |
7709 | but is kept separate for now. */ | |
c906108c | 7710 | |
dee91e82 DE |
7711 | static void |
7712 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7713 | const gdb_byte *info_ptr, |
dee91e82 DE |
7714 | struct die_info *comp_unit_die, |
7715 | int has_children, | |
7716 | void *data) | |
7717 | { | |
7718 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 7719 | enum language *language_ptr = (enum language *) data; |
6caca83c | 7720 | |
dee91e82 DE |
7721 | gdb_assert (cu->die_hash == NULL); |
7722 | cu->die_hash = | |
7723 | htab_create_alloc_ex (cu->header.length / 12, | |
7724 | die_hash, | |
7725 | die_eq, | |
7726 | NULL, | |
7727 | &cu->comp_unit_obstack, | |
7728 | hashtab_obstack_allocate, | |
7729 | dummy_obstack_deallocate); | |
e142c38c | 7730 | |
dee91e82 DE |
7731 | if (has_children) |
7732 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7733 | &info_ptr, comp_unit_die); | |
7734 | cu->dies = comp_unit_die; | |
7735 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7736 | |
7737 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7738 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7739 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7740 | or we won't be able to build types correctly. |
7741 | Similarly, if we do not read the producer, we can not apply | |
7742 | producer-specific interpretation. */ | |
95554aad | 7743 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7744 | } |
10b3939b | 7745 | |
dee91e82 | 7746 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7747 | |
dee91e82 | 7748 | static void |
95554aad TT |
7749 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7750 | enum language pretend_language) | |
dee91e82 | 7751 | { |
3019eac3 | 7752 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7753 | |
f4dc4d17 DE |
7754 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7755 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7756 | } |
7757 | ||
3da10d80 KS |
7758 | /* Add a DIE to the delayed physname list. */ |
7759 | ||
7760 | static void | |
7761 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7762 | const char *name, struct die_info *die, | |
7763 | struct dwarf2_cu *cu) | |
7764 | { | |
7765 | struct delayed_method_info mi; | |
7766 | mi.type = type; | |
7767 | mi.fnfield_index = fnfield_index; | |
7768 | mi.index = index; | |
7769 | mi.name = name; | |
7770 | mi.die = die; | |
7771 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7772 | } | |
7773 | ||
7774 | /* A cleanup for freeing the delayed method list. */ | |
7775 | ||
7776 | static void | |
7777 | free_delayed_list (void *ptr) | |
7778 | { | |
7779 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7780 | if (cu->method_list != NULL) | |
7781 | { | |
7782 | VEC_free (delayed_method_info, cu->method_list); | |
7783 | cu->method_list = NULL; | |
7784 | } | |
7785 | } | |
7786 | ||
7787 | /* Compute the physnames of any methods on the CU's method list. | |
7788 | ||
7789 | The computation of method physnames is delayed in order to avoid the | |
7790 | (bad) condition that one of the method's formal parameters is of an as yet | |
7791 | incomplete type. */ | |
7792 | ||
7793 | static void | |
7794 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7795 | { | |
7796 | int i; | |
7797 | struct delayed_method_info *mi; | |
7798 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7799 | { | |
1d06ead6 | 7800 | const char *physname; |
3da10d80 KS |
7801 | struct fn_fieldlist *fn_flp |
7802 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7803 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
7804 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
7805 | = physname ? physname : ""; | |
3da10d80 KS |
7806 | } |
7807 | } | |
7808 | ||
a766d390 DE |
7809 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7810 | and it's not clear if/how imported objects will appear. | |
7811 | To keep Go support simple until that's worked out, | |
7812 | go back through what we've read and create something usable. | |
7813 | We could do this while processing each DIE, and feels kinda cleaner, | |
7814 | but that way is more invasive. | |
7815 | This is to, for example, allow the user to type "p var" or "b main" | |
7816 | without having to specify the package name, and allow lookups | |
7817 | of module.object to work in contexts that use the expression | |
7818 | parser. */ | |
7819 | ||
7820 | static void | |
7821 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7822 | { | |
7823 | char *package_name = NULL; | |
7824 | struct pending *list; | |
7825 | int i; | |
7826 | ||
7827 | for (list = global_symbols; list != NULL; list = list->next) | |
7828 | { | |
7829 | for (i = 0; i < list->nsyms; ++i) | |
7830 | { | |
7831 | struct symbol *sym = list->symbol[i]; | |
7832 | ||
7833 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7834 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7835 | { | |
7836 | char *this_package_name = go_symbol_package_name (sym); | |
7837 | ||
7838 | if (this_package_name == NULL) | |
7839 | continue; | |
7840 | if (package_name == NULL) | |
7841 | package_name = this_package_name; | |
7842 | else | |
7843 | { | |
7844 | if (strcmp (package_name, this_package_name) != 0) | |
7845 | complaint (&symfile_complaints, | |
7846 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
7847 | (symbol_symtab (sym) != NULL |
7848 | ? symtab_to_filename_for_display | |
7849 | (symbol_symtab (sym)) | |
4262abfb | 7850 | : objfile_name (cu->objfile)), |
a766d390 DE |
7851 | this_package_name, package_name); |
7852 | xfree (this_package_name); | |
7853 | } | |
7854 | } | |
7855 | } | |
7856 | } | |
7857 | ||
7858 | if (package_name != NULL) | |
7859 | { | |
7860 | struct objfile *objfile = cu->objfile; | |
34a68019 | 7861 | const char *saved_package_name |
224c3ddb SM |
7862 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
7863 | package_name, | |
7864 | strlen (package_name)); | |
a766d390 | 7865 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 7866 | saved_package_name, objfile); |
a766d390 DE |
7867 | struct symbol *sym; |
7868 | ||
7869 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7870 | ||
e623cf5d | 7871 | sym = allocate_symbol (objfile); |
f85f34ed | 7872 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7873 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7874 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7875 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7876 | e.g., "main" finds the "main" module and not C's main(). */ | |
7877 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7878 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7879 | SYMBOL_TYPE (sym) = type; |
7880 | ||
7881 | add_symbol_to_list (sym, &global_symbols); | |
7882 | ||
7883 | xfree (package_name); | |
7884 | } | |
7885 | } | |
7886 | ||
95554aad TT |
7887 | /* Return the symtab for PER_CU. This works properly regardless of |
7888 | whether we're using the index or psymtabs. */ | |
7889 | ||
43f3e411 DE |
7890 | static struct compunit_symtab * |
7891 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
7892 | { |
7893 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
7894 | ? per_cu->v.quick->compunit_symtab |
7895 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
7896 | } |
7897 | ||
7898 | /* A helper function for computing the list of all symbol tables | |
7899 | included by PER_CU. */ | |
7900 | ||
7901 | static void | |
43f3e411 | 7902 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 7903 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 7904 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 7905 | struct compunit_symtab *immediate_parent) |
95554aad TT |
7906 | { |
7907 | void **slot; | |
7908 | int ix; | |
43f3e411 | 7909 | struct compunit_symtab *cust; |
95554aad TT |
7910 | struct dwarf2_per_cu_data *iter; |
7911 | ||
7912 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7913 | if (*slot != NULL) | |
7914 | { | |
7915 | /* This inclusion and its children have been processed. */ | |
7916 | return; | |
7917 | } | |
7918 | ||
7919 | *slot = per_cu; | |
7920 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
7921 | cust = get_compunit_symtab (per_cu); |
7922 | if (cust != NULL) | |
ec94af83 DE |
7923 | { |
7924 | /* If this is a type unit only add its symbol table if we haven't | |
7925 | seen it yet (type unit per_cu's can share symtabs). */ | |
7926 | if (per_cu->is_debug_types) | |
7927 | { | |
43f3e411 | 7928 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
7929 | if (*slot == NULL) |
7930 | { | |
43f3e411 DE |
7931 | *slot = cust; |
7932 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
7933 | if (cust->user == NULL) | |
7934 | cust->user = immediate_parent; | |
ec94af83 DE |
7935 | } |
7936 | } | |
7937 | else | |
f9125b6c | 7938 | { |
43f3e411 DE |
7939 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
7940 | if (cust->user == NULL) | |
7941 | cust->user = immediate_parent; | |
f9125b6c | 7942 | } |
ec94af83 | 7943 | } |
95554aad TT |
7944 | |
7945 | for (ix = 0; | |
796a7ff8 | 7946 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7947 | ++ix) |
ec94af83 DE |
7948 | { |
7949 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 7950 | all_type_symtabs, iter, cust); |
ec94af83 | 7951 | } |
95554aad TT |
7952 | } |
7953 | ||
43f3e411 | 7954 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
7955 | PER_CU. */ |
7956 | ||
7957 | static void | |
43f3e411 | 7958 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 7959 | { |
f4dc4d17 DE |
7960 | gdb_assert (! per_cu->is_debug_types); |
7961 | ||
796a7ff8 | 7962 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7963 | { |
7964 | int ix, len; | |
ec94af83 | 7965 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
7966 | struct compunit_symtab *compunit_symtab_iter; |
7967 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 7968 | htab_t all_children, all_type_symtabs; |
43f3e411 | 7969 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
7970 | |
7971 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 7972 | if (cust == NULL) |
95554aad TT |
7973 | return; |
7974 | ||
7975 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7976 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7977 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7978 | NULL, xcalloc, xfree); | |
95554aad TT |
7979 | |
7980 | for (ix = 0; | |
796a7ff8 | 7981 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7982 | ix, per_cu_iter); |
95554aad | 7983 | ++ix) |
ec94af83 DE |
7984 | { |
7985 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 7986 | all_type_symtabs, per_cu_iter, |
43f3e411 | 7987 | cust); |
ec94af83 | 7988 | } |
95554aad | 7989 | |
ec94af83 | 7990 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
7991 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
7992 | cust->includes | |
8d749320 SM |
7993 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
7994 | struct compunit_symtab *, len + 1); | |
95554aad | 7995 | for (ix = 0; |
43f3e411 DE |
7996 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
7997 | compunit_symtab_iter); | |
95554aad | 7998 | ++ix) |
43f3e411 DE |
7999 | cust->includes[ix] = compunit_symtab_iter; |
8000 | cust->includes[len] = NULL; | |
95554aad | 8001 | |
43f3e411 | 8002 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8003 | htab_delete (all_children); |
ec94af83 | 8004 | htab_delete (all_type_symtabs); |
95554aad TT |
8005 | } |
8006 | } | |
8007 | ||
8008 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8009 | read. */ | |
8010 | ||
8011 | static void | |
8012 | process_cu_includes (void) | |
8013 | { | |
8014 | int ix; | |
8015 | struct dwarf2_per_cu_data *iter; | |
8016 | ||
8017 | for (ix = 0; | |
8018 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8019 | ix, iter); | |
8020 | ++ix) | |
f4dc4d17 DE |
8021 | { |
8022 | if (! iter->is_debug_types) | |
43f3e411 | 8023 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8024 | } |
95554aad TT |
8025 | |
8026 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8027 | } | |
8028 | ||
9cdd5dbd | 8029 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8030 | already been loaded into memory. */ |
8031 | ||
8032 | static void | |
95554aad TT |
8033 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8034 | enum language pretend_language) | |
10b3939b | 8035 | { |
10b3939b | 8036 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8037 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8038 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8039 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8040 | struct compunit_symtab *cust; |
3da10d80 | 8041 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 8042 | CORE_ADDR baseaddr; |
4359dff1 | 8043 | struct block *static_block; |
3e29f34a | 8044 | CORE_ADDR addr; |
10b3939b DJ |
8045 | |
8046 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8047 | ||
10b3939b DJ |
8048 | buildsym_init (); |
8049 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 8050 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8051 | |
8052 | cu->list_in_scope = &file_symbols; | |
c906108c | 8053 | |
95554aad TT |
8054 | cu->language = pretend_language; |
8055 | cu->language_defn = language_def (cu->language); | |
8056 | ||
c906108c | 8057 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8058 | process_die (cu->dies, cu); |
c906108c | 8059 | |
a766d390 DE |
8060 | /* For now fudge the Go package. */ |
8061 | if (cu->language == language_go) | |
8062 | fixup_go_packaging (cu); | |
8063 | ||
3da10d80 KS |
8064 | /* Now that we have processed all the DIEs in the CU, all the types |
8065 | should be complete, and it should now be safe to compute all of the | |
8066 | physnames. */ | |
8067 | compute_delayed_physnames (cu); | |
8068 | do_cleanups (delayed_list_cleanup); | |
8069 | ||
fae299cd DC |
8070 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8071 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8072 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8073 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8074 | |
3e29f34a MR |
8075 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8076 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8077 | |
8078 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8079 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8080 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8081 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8082 | this comp unit. */ | |
8083 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8084 | ||
43f3e411 DE |
8085 | cust = end_symtab_from_static_block (static_block, |
8086 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8087 | |
43f3e411 | 8088 | if (cust != NULL) |
c906108c | 8089 | { |
df15bd07 | 8090 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8091 | |
8be455d7 JK |
8092 | /* Set symtab language to language from DW_AT_language. If the |
8093 | compilation is from a C file generated by language preprocessors, do | |
8094 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8095 | if (!(cu->language == language_c |
40e3ad0e | 8096 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8097 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8098 | |
8099 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8100 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8101 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8102 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8103 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8104 | |
8105 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8106 | needed, it would be wrong due to missing DW_AT_producer there. | |
8107 | ||
8108 | Still one can confuse GDB by using non-standard GCC compilation | |
8109 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8110 | */ | |
ab260dad | 8111 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8112 | cust->locations_valid = 1; |
e0d00bc7 JK |
8113 | |
8114 | if (gcc_4_minor >= 5) | |
43f3e411 | 8115 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8116 | |
43f3e411 | 8117 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8118 | } |
9291a0cd TT |
8119 | |
8120 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8121 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8122 | else |
8123 | { | |
8124 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8125 | pst->compunit_symtab = cust; |
9291a0cd TT |
8126 | pst->readin = 1; |
8127 | } | |
c906108c | 8128 | |
95554aad TT |
8129 | /* Push it for inclusion processing later. */ |
8130 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
8131 | ||
c906108c | 8132 | do_cleanups (back_to); |
f4dc4d17 | 8133 | } |
45cfd468 | 8134 | |
f4dc4d17 DE |
8135 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8136 | already been loaded into memory. */ | |
8137 | ||
8138 | static void | |
8139 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8140 | enum language pretend_language) | |
8141 | { | |
8142 | struct dwarf2_cu *cu = per_cu->cu; | |
8143 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 8144 | struct compunit_symtab *cust; |
f4dc4d17 | 8145 | struct cleanup *back_to, *delayed_list_cleanup; |
0186c6a7 DE |
8146 | struct signatured_type *sig_type; |
8147 | ||
8148 | gdb_assert (per_cu->is_debug_types); | |
8149 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8150 | |
8151 | buildsym_init (); | |
8152 | back_to = make_cleanup (really_free_pendings, NULL); | |
8153 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
8154 | ||
8155 | cu->list_in_scope = &file_symbols; | |
8156 | ||
8157 | cu->language = pretend_language; | |
8158 | cu->language_defn = language_def (cu->language); | |
8159 | ||
8160 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8161 | process_die (cu->dies, cu); | |
8162 | ||
8163 | /* For now fudge the Go package. */ | |
8164 | if (cu->language == language_go) | |
8165 | fixup_go_packaging (cu); | |
8166 | ||
8167 | /* Now that we have processed all the DIEs in the CU, all the types | |
8168 | should be complete, and it should now be safe to compute all of the | |
8169 | physnames. */ | |
8170 | compute_delayed_physnames (cu); | |
8171 | do_cleanups (delayed_list_cleanup); | |
8172 | ||
8173 | /* TUs share symbol tables. | |
8174 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8175 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8176 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 8177 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 8178 | { |
43f3e411 DE |
8179 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
8180 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 8181 | |
43f3e411 | 8182 | if (cust != NULL) |
f4dc4d17 DE |
8183 | { |
8184 | /* Set symtab language to language from DW_AT_language. If the | |
8185 | compilation is from a C file generated by language preprocessors, | |
8186 | do not set the language if it was already deduced by | |
8187 | start_subfile. */ | |
43f3e411 DE |
8188 | if (!(cu->language == language_c |
8189 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
8190 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
8191 | } |
8192 | } | |
8193 | else | |
8194 | { | |
0ab9ce85 | 8195 | augment_type_symtab (); |
43f3e411 | 8196 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
8197 | } |
8198 | ||
8199 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8200 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
8201 | else |
8202 | { | |
8203 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8204 | pst->compunit_symtab = cust; |
f4dc4d17 | 8205 | pst->readin = 1; |
45cfd468 | 8206 | } |
f4dc4d17 DE |
8207 | |
8208 | do_cleanups (back_to); | |
c906108c SS |
8209 | } |
8210 | ||
95554aad TT |
8211 | /* Process an imported unit DIE. */ |
8212 | ||
8213 | static void | |
8214 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8215 | { | |
8216 | struct attribute *attr; | |
8217 | ||
f4dc4d17 DE |
8218 | /* For now we don't handle imported units in type units. */ |
8219 | if (cu->per_cu->is_debug_types) | |
8220 | { | |
8221 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8222 | " supported in type units [in module %s]"), | |
4262abfb | 8223 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8224 | } |
8225 | ||
95554aad TT |
8226 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8227 | if (attr != NULL) | |
8228 | { | |
8229 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 8230 | sect_offset offset; |
36586728 | 8231 | int is_dwz; |
95554aad TT |
8232 | |
8233 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
8234 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
8235 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 8236 | |
69d751e3 | 8237 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8238 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8239 | load_full_comp_unit (per_cu, cu->language); | |
8240 | ||
796a7ff8 | 8241 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8242 | per_cu); |
8243 | } | |
8244 | } | |
8245 | ||
adde2bff DE |
8246 | /* Reset the in_process bit of a die. */ |
8247 | ||
8248 | static void | |
8249 | reset_die_in_process (void *arg) | |
8250 | { | |
9a3c8263 | 8251 | struct die_info *die = (struct die_info *) arg; |
8c3cb9fa | 8252 | |
adde2bff DE |
8253 | die->in_process = 0; |
8254 | } | |
8255 | ||
c906108c SS |
8256 | /* Process a die and its children. */ |
8257 | ||
8258 | static void | |
e7c27a73 | 8259 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8260 | { |
adde2bff DE |
8261 | struct cleanup *in_process; |
8262 | ||
8263 | /* We should only be processing those not already in process. */ | |
8264 | gdb_assert (!die->in_process); | |
8265 | ||
8266 | die->in_process = 1; | |
8267 | in_process = make_cleanup (reset_die_in_process,die); | |
8268 | ||
c906108c SS |
8269 | switch (die->tag) |
8270 | { | |
8271 | case DW_TAG_padding: | |
8272 | break; | |
8273 | case DW_TAG_compile_unit: | |
95554aad | 8274 | case DW_TAG_partial_unit: |
e7c27a73 | 8275 | read_file_scope (die, cu); |
c906108c | 8276 | break; |
348e048f DE |
8277 | case DW_TAG_type_unit: |
8278 | read_type_unit_scope (die, cu); | |
8279 | break; | |
c906108c | 8280 | case DW_TAG_subprogram: |
c906108c | 8281 | case DW_TAG_inlined_subroutine: |
edb3359d | 8282 | read_func_scope (die, cu); |
c906108c SS |
8283 | break; |
8284 | case DW_TAG_lexical_block: | |
14898363 L |
8285 | case DW_TAG_try_block: |
8286 | case DW_TAG_catch_block: | |
e7c27a73 | 8287 | read_lexical_block_scope (die, cu); |
c906108c | 8288 | break; |
96408a79 SA |
8289 | case DW_TAG_GNU_call_site: |
8290 | read_call_site_scope (die, cu); | |
8291 | break; | |
c906108c | 8292 | case DW_TAG_class_type: |
680b30c7 | 8293 | case DW_TAG_interface_type: |
c906108c SS |
8294 | case DW_TAG_structure_type: |
8295 | case DW_TAG_union_type: | |
134d01f1 | 8296 | process_structure_scope (die, cu); |
c906108c SS |
8297 | break; |
8298 | case DW_TAG_enumeration_type: | |
134d01f1 | 8299 | process_enumeration_scope (die, cu); |
c906108c | 8300 | break; |
134d01f1 | 8301 | |
f792889a DJ |
8302 | /* These dies have a type, but processing them does not create |
8303 | a symbol or recurse to process the children. Therefore we can | |
8304 | read them on-demand through read_type_die. */ | |
c906108c | 8305 | case DW_TAG_subroutine_type: |
72019c9c | 8306 | case DW_TAG_set_type: |
c906108c | 8307 | case DW_TAG_array_type: |
c906108c | 8308 | case DW_TAG_pointer_type: |
c906108c | 8309 | case DW_TAG_ptr_to_member_type: |
c906108c | 8310 | case DW_TAG_reference_type: |
c906108c | 8311 | case DW_TAG_string_type: |
c906108c | 8312 | break; |
134d01f1 | 8313 | |
c906108c | 8314 | case DW_TAG_base_type: |
a02abb62 | 8315 | case DW_TAG_subrange_type: |
cb249c71 | 8316 | case DW_TAG_typedef: |
134d01f1 DJ |
8317 | /* Add a typedef symbol for the type definition, if it has a |
8318 | DW_AT_name. */ | |
f792889a | 8319 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8320 | break; |
c906108c | 8321 | case DW_TAG_common_block: |
e7c27a73 | 8322 | read_common_block (die, cu); |
c906108c SS |
8323 | break; |
8324 | case DW_TAG_common_inclusion: | |
8325 | break; | |
d9fa45fe | 8326 | case DW_TAG_namespace: |
4d4ec4e5 | 8327 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8328 | read_namespace (die, cu); |
d9fa45fe | 8329 | break; |
5d7cb8df | 8330 | case DW_TAG_module: |
4d4ec4e5 | 8331 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8332 | read_module (die, cu); |
8333 | break; | |
d9fa45fe | 8334 | case DW_TAG_imported_declaration: |
74921315 KS |
8335 | cu->processing_has_namespace_info = 1; |
8336 | if (read_namespace_alias (die, cu)) | |
8337 | break; | |
8338 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8339 | case DW_TAG_imported_module: |
4d4ec4e5 | 8340 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8341 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8342 | || cu->language != language_fortran)) | |
8343 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8344 | dwarf_tag_name (die->tag)); | |
8345 | read_import_statement (die, cu); | |
d9fa45fe | 8346 | break; |
95554aad TT |
8347 | |
8348 | case DW_TAG_imported_unit: | |
8349 | process_imported_unit_die (die, cu); | |
8350 | break; | |
8351 | ||
c906108c | 8352 | default: |
e7c27a73 | 8353 | new_symbol (die, NULL, cu); |
c906108c SS |
8354 | break; |
8355 | } | |
adde2bff DE |
8356 | |
8357 | do_cleanups (in_process); | |
c906108c | 8358 | } |
ca69b9e6 DE |
8359 | \f |
8360 | /* DWARF name computation. */ | |
c906108c | 8361 | |
94af9270 KS |
8362 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8363 | needs to have the name of the scope prepended to the name listed in the | |
8364 | die. */ | |
8365 | ||
8366 | static int | |
8367 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8368 | { | |
1c809c68 TT |
8369 | struct attribute *attr; |
8370 | ||
94af9270 KS |
8371 | switch (die->tag) |
8372 | { | |
8373 | case DW_TAG_namespace: | |
8374 | case DW_TAG_typedef: | |
8375 | case DW_TAG_class_type: | |
8376 | case DW_TAG_interface_type: | |
8377 | case DW_TAG_structure_type: | |
8378 | case DW_TAG_union_type: | |
8379 | case DW_TAG_enumeration_type: | |
8380 | case DW_TAG_enumerator: | |
8381 | case DW_TAG_subprogram: | |
08a76f8a | 8382 | case DW_TAG_inlined_subroutine: |
94af9270 | 8383 | case DW_TAG_member: |
74921315 | 8384 | case DW_TAG_imported_declaration: |
94af9270 KS |
8385 | return 1; |
8386 | ||
8387 | case DW_TAG_variable: | |
c2b0a229 | 8388 | case DW_TAG_constant: |
94af9270 KS |
8389 | /* We only need to prefix "globally" visible variables. These include |
8390 | any variable marked with DW_AT_external or any variable that | |
8391 | lives in a namespace. [Variables in anonymous namespaces | |
8392 | require prefixing, but they are not DW_AT_external.] */ | |
8393 | ||
8394 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8395 | { | |
8396 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8397 | |
94af9270 KS |
8398 | return die_needs_namespace (die_specification (die, &spec_cu), |
8399 | spec_cu); | |
8400 | } | |
8401 | ||
1c809c68 | 8402 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8403 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8404 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8405 | return 0; |
8406 | /* A variable in a lexical block of some kind does not need a | |
8407 | namespace, even though in C++ such variables may be external | |
8408 | and have a mangled name. */ | |
8409 | if (die->parent->tag == DW_TAG_lexical_block | |
8410 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8411 | || die->parent->tag == DW_TAG_catch_block |
8412 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8413 | return 0; |
8414 | return 1; | |
94af9270 KS |
8415 | |
8416 | default: | |
8417 | return 0; | |
8418 | } | |
8419 | } | |
8420 | ||
98bfdba5 PA |
8421 | /* Retrieve the last character from a mem_file. */ |
8422 | ||
8423 | static void | |
8424 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
8425 | { | |
8426 | char *last_char_p = (char *) object; | |
8427 | ||
8428 | if (length > 0) | |
8429 | *last_char_p = buffer[length - 1]; | |
8430 | } | |
8431 | ||
94af9270 | 8432 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
8433 | compute the physname for the object, which include a method's: |
8434 | - formal parameters (C++/Java), | |
8435 | - receiver type (Go), | |
8436 | - return type (Java). | |
8437 | ||
8438 | The term "physname" is a bit confusing. | |
8439 | For C++, for example, it is the demangled name. | |
8440 | For Go, for example, it's the mangled name. | |
94af9270 | 8441 | |
af6b7be1 JB |
8442 | For Ada, return the DIE's linkage name rather than the fully qualified |
8443 | name. PHYSNAME is ignored.. | |
8444 | ||
94af9270 KS |
8445 | The result is allocated on the objfile_obstack and canonicalized. */ |
8446 | ||
8447 | static const char * | |
15d034d0 TT |
8448 | dwarf2_compute_name (const char *name, |
8449 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8450 | int physname) |
8451 | { | |
bb5ed363 DE |
8452 | struct objfile *objfile = cu->objfile; |
8453 | ||
94af9270 KS |
8454 | if (name == NULL) |
8455 | name = dwarf2_name (die, cu); | |
8456 | ||
2ee7123e DE |
8457 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
8458 | but otherwise compute it by typename_concat inside GDB. | |
8459 | FIXME: Actually this is not really true, or at least not always true. | |
8460 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
8461 | Fortran names because there is no mangling standard. So new_symbol_full | |
8462 | will set the demangled name to the result of dwarf2_full_name, and it is | |
8463 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
8464 | if (cu->language == language_ada |
8465 | || (cu->language == language_fortran && physname)) | |
8466 | { | |
8467 | /* For Ada unit, we prefer the linkage name over the name, as | |
8468 | the former contains the exported name, which the user expects | |
8469 | to be able to reference. Ideally, we want the user to be able | |
8470 | to reference this entity using either natural or linkage name, | |
8471 | but we haven't started looking at this enhancement yet. */ | |
2ee7123e | 8472 | const char *linkage_name; |
f55ee35c | 8473 | |
2ee7123e DE |
8474 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
8475 | if (linkage_name == NULL) | |
8476 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8477 | if (linkage_name != NULL) | |
8478 | return linkage_name; | |
f55ee35c JK |
8479 | } |
8480 | ||
94af9270 KS |
8481 | /* These are the only languages we know how to qualify names in. */ |
8482 | if (name != NULL | |
f55ee35c | 8483 | && (cu->language == language_cplus || cu->language == language_java |
c44af4eb TT |
8484 | || cu->language == language_fortran || cu->language == language_d |
8485 | || cu->language == language_rust)) | |
94af9270 KS |
8486 | { |
8487 | if (die_needs_namespace (die, cu)) | |
8488 | { | |
8489 | long length; | |
0d5cff50 | 8490 | const char *prefix; |
94af9270 | 8491 | struct ui_file *buf; |
34a68019 TT |
8492 | char *intermediate_name; |
8493 | const char *canonical_name = NULL; | |
94af9270 KS |
8494 | |
8495 | prefix = determine_prefix (die, cu); | |
8496 | buf = mem_fileopen (); | |
8497 | if (*prefix != '\0') | |
8498 | { | |
f55ee35c JK |
8499 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8500 | physname, cu); | |
9a619af0 | 8501 | |
94af9270 KS |
8502 | fputs_unfiltered (prefixed_name, buf); |
8503 | xfree (prefixed_name); | |
8504 | } | |
8505 | else | |
62d5b8da | 8506 | fputs_unfiltered (name, buf); |
94af9270 | 8507 | |
98bfdba5 PA |
8508 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8509 | as children with DW_TAG_template_type_param or | |
8510 | DW_TAG_value_type_param. If the latter, add them to the name | |
8511 | here. If the name already has template parameters, then | |
8512 | skip this step; some versions of GCC emit both, and | |
8513 | it is more efficient to use the pre-computed name. | |
8514 | ||
8515 | Something to keep in mind about this process: it is very | |
8516 | unlikely, or in some cases downright impossible, to produce | |
8517 | something that will match the mangled name of a function. | |
8518 | If the definition of the function has the same debug info, | |
8519 | we should be able to match up with it anyway. But fallbacks | |
8520 | using the minimal symbol, for instance to find a method | |
8521 | implemented in a stripped copy of libstdc++, will not work. | |
8522 | If we do not have debug info for the definition, we will have to | |
8523 | match them up some other way. | |
8524 | ||
8525 | When we do name matching there is a related problem with function | |
8526 | templates; two instantiated function templates are allowed to | |
8527 | differ only by their return types, which we do not add here. */ | |
8528 | ||
8529 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8530 | { | |
8531 | struct attribute *attr; | |
8532 | struct die_info *child; | |
8533 | int first = 1; | |
8534 | ||
8535 | die->building_fullname = 1; | |
8536 | ||
8537 | for (child = die->child; child != NULL; child = child->sibling) | |
8538 | { | |
8539 | struct type *type; | |
12df843f | 8540 | LONGEST value; |
d521ce57 | 8541 | const gdb_byte *bytes; |
98bfdba5 PA |
8542 | struct dwarf2_locexpr_baton *baton; |
8543 | struct value *v; | |
8544 | ||
8545 | if (child->tag != DW_TAG_template_type_param | |
8546 | && child->tag != DW_TAG_template_value_param) | |
8547 | continue; | |
8548 | ||
8549 | if (first) | |
8550 | { | |
8551 | fputs_unfiltered ("<", buf); | |
8552 | first = 0; | |
8553 | } | |
8554 | else | |
8555 | fputs_unfiltered (", ", buf); | |
8556 | ||
8557 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8558 | if (attr == NULL) | |
8559 | { | |
8560 | complaint (&symfile_complaints, | |
8561 | _("template parameter missing DW_AT_type")); | |
8562 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8563 | continue; | |
8564 | } | |
8565 | type = die_type (child, cu); | |
8566 | ||
8567 | if (child->tag == DW_TAG_template_type_param) | |
8568 | { | |
79d43c61 | 8569 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8570 | continue; |
8571 | } | |
8572 | ||
8573 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8574 | if (attr == NULL) | |
8575 | { | |
8576 | complaint (&symfile_complaints, | |
3e43a32a MS |
8577 | _("template parameter missing " |
8578 | "DW_AT_const_value")); | |
98bfdba5 PA |
8579 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8580 | continue; | |
8581 | } | |
8582 | ||
8583 | dwarf2_const_value_attr (attr, type, name, | |
8584 | &cu->comp_unit_obstack, cu, | |
8585 | &value, &bytes, &baton); | |
8586 | ||
8587 | if (TYPE_NOSIGN (type)) | |
8588 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8589 | changed, this can use value_print instead. */ | |
8590 | c_printchar (value, type, buf); | |
8591 | else | |
8592 | { | |
8593 | struct value_print_options opts; | |
8594 | ||
8595 | if (baton != NULL) | |
8596 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8597 | baton->data, | |
8598 | baton->size, | |
8599 | baton->per_cu); | |
8600 | else if (bytes != NULL) | |
8601 | { | |
8602 | v = allocate_value (type); | |
8603 | memcpy (value_contents_writeable (v), bytes, | |
8604 | TYPE_LENGTH (type)); | |
8605 | } | |
8606 | else | |
8607 | v = value_from_longest (type, value); | |
8608 | ||
3e43a32a MS |
8609 | /* Specify decimal so that we do not depend on |
8610 | the radix. */ | |
98bfdba5 PA |
8611 | get_formatted_print_options (&opts, 'd'); |
8612 | opts.raw = 1; | |
8613 | value_print (v, buf, &opts); | |
8614 | release_value (v); | |
8615 | value_free (v); | |
8616 | } | |
8617 | } | |
8618 | ||
8619 | die->building_fullname = 0; | |
8620 | ||
8621 | if (!first) | |
8622 | { | |
8623 | /* Close the argument list, with a space if necessary | |
8624 | (nested templates). */ | |
8625 | char last_char = '\0'; | |
8626 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8627 | if (last_char == '>') | |
8628 | fputs_unfiltered (" >", buf); | |
8629 | else | |
8630 | fputs_unfiltered (">", buf); | |
8631 | } | |
8632 | } | |
8633 | ||
94af9270 KS |
8634 | /* For Java and C++ methods, append formal parameter type |
8635 | information, if PHYSNAME. */ | |
6e70227d | 8636 | |
94af9270 KS |
8637 | if (physname && die->tag == DW_TAG_subprogram |
8638 | && (cu->language == language_cplus | |
8639 | || cu->language == language_java)) | |
8640 | { | |
8641 | struct type *type = read_type_die (die, cu); | |
8642 | ||
79d43c61 TT |
8643 | c_type_print_args (type, buf, 1, cu->language, |
8644 | &type_print_raw_options); | |
94af9270 KS |
8645 | |
8646 | if (cu->language == language_java) | |
8647 | { | |
8648 | /* For java, we must append the return type to method | |
0963b4bd | 8649 | names. */ |
94af9270 KS |
8650 | if (die->tag == DW_TAG_subprogram) |
8651 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 8652 | 0, 0, &type_print_raw_options); |
94af9270 KS |
8653 | } |
8654 | else if (cu->language == language_cplus) | |
8655 | { | |
60430eff DJ |
8656 | /* Assume that an artificial first parameter is |
8657 | "this", but do not crash if it is not. RealView | |
8658 | marks unnamed (and thus unused) parameters as | |
8659 | artificial; there is no way to differentiate | |
8660 | the two cases. */ | |
94af9270 KS |
8661 | if (TYPE_NFIELDS (type) > 0 |
8662 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8663 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8664 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8665 | 0)))) | |
94af9270 KS |
8666 | fputs_unfiltered (" const", buf); |
8667 | } | |
8668 | } | |
8669 | ||
34a68019 | 8670 | intermediate_name = ui_file_xstrdup (buf, &length); |
94af9270 KS |
8671 | ui_file_delete (buf); |
8672 | ||
8673 | if (cu->language == language_cplus) | |
34a68019 TT |
8674 | canonical_name |
8675 | = dwarf2_canonicalize_name (intermediate_name, cu, | |
8676 | &objfile->per_bfd->storage_obstack); | |
8677 | ||
8678 | /* If we only computed INTERMEDIATE_NAME, or if | |
8679 | INTERMEDIATE_NAME is already canonical, then we need to | |
8680 | copy it to the appropriate obstack. */ | |
8681 | if (canonical_name == NULL || canonical_name == intermediate_name) | |
224c3ddb SM |
8682 | name = ((const char *) |
8683 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
8684 | intermediate_name, | |
8685 | strlen (intermediate_name))); | |
34a68019 TT |
8686 | else |
8687 | name = canonical_name; | |
9a619af0 | 8688 | |
34a68019 | 8689 | xfree (intermediate_name); |
94af9270 KS |
8690 | } |
8691 | } | |
8692 | ||
8693 | return name; | |
8694 | } | |
8695 | ||
0114d602 DJ |
8696 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8697 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 8698 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
8699 | not have a name. NAME may either be from a previous call to |
8700 | dwarf2_name or NULL. | |
8701 | ||
0963b4bd | 8702 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
8703 | |
8704 | static const char * | |
15d034d0 | 8705 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8706 | { |
94af9270 KS |
8707 | return dwarf2_compute_name (name, die, cu, 0); |
8708 | } | |
0114d602 | 8709 | |
94af9270 KS |
8710 | /* Construct a physname for the given DIE in CU. NAME may either be |
8711 | from a previous call to dwarf2_name or NULL. The result will be | |
8712 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8713 | name. | |
0114d602 | 8714 | |
94af9270 | 8715 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 8716 | |
94af9270 | 8717 | static const char * |
15d034d0 | 8718 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8719 | { |
bb5ed363 | 8720 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8721 | const char *retval, *mangled = NULL, *canon = NULL; |
8722 | struct cleanup *back_to; | |
8723 | int need_copy = 1; | |
8724 | ||
8725 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8726 | on its own. */ | |
8727 | if (!die_needs_namespace (die, cu)) | |
8728 | return dwarf2_compute_name (name, die, cu, 1); | |
8729 | ||
8730 | back_to = make_cleanup (null_cleanup, NULL); | |
8731 | ||
7d45c7c3 KB |
8732 | mangled = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
8733 | if (mangled == NULL) | |
8734 | mangled = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
900e11f9 JK |
8735 | |
8736 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
8737 | has computed. */ | |
7d45c7c3 | 8738 | if (mangled != NULL) |
900e11f9 JK |
8739 | { |
8740 | char *demangled; | |
8741 | ||
900e11f9 JK |
8742 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
8743 | type. It is easier for GDB users to search for such functions as | |
8744 | `name(params)' than `long name(params)'. In such case the minimal | |
8745 | symbol names do not match the full symbol names but for template | |
8746 | functions there is never a need to look up their definition from their | |
8747 | declaration so the only disadvantage remains the minimal symbol | |
8748 | variant `long name(params)' does not have the proper inferior type. | |
8749 | */ | |
8750 | ||
a766d390 DE |
8751 | if (cu->language == language_go) |
8752 | { | |
8753 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8754 | new_symbol_full assumes we return the mangled name. | |
8755 | This just undoes that lie until things are cleaned up. */ | |
8756 | demangled = NULL; | |
8757 | } | |
8758 | else | |
8759 | { | |
8de20a37 TT |
8760 | demangled = gdb_demangle (mangled, |
8761 | (DMGL_PARAMS | DMGL_ANSI | |
8762 | | (cu->language == language_java | |
8763 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
8764 | : DMGL_RET_DROP))); | |
a766d390 | 8765 | } |
900e11f9 JK |
8766 | if (demangled) |
8767 | { | |
8768 | make_cleanup (xfree, demangled); | |
8769 | canon = demangled; | |
8770 | } | |
8771 | else | |
8772 | { | |
8773 | canon = mangled; | |
8774 | need_copy = 0; | |
8775 | } | |
8776 | } | |
8777 | ||
8778 | if (canon == NULL || check_physname) | |
8779 | { | |
8780 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8781 | ||
8782 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8783 | { | |
8784 | /* It may not mean a bug in GDB. The compiler could also | |
8785 | compute DW_AT_linkage_name incorrectly. But in such case | |
8786 | GDB would need to be bug-to-bug compatible. */ | |
8787 | ||
8788 | complaint (&symfile_complaints, | |
8789 | _("Computed physname <%s> does not match demangled <%s> " | |
8790 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8791 | physname, canon, mangled, die->offset.sect_off, |
8792 | objfile_name (objfile)); | |
900e11f9 JK |
8793 | |
8794 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8795 | is available here - over computed PHYSNAME. It is safer | |
8796 | against both buggy GDB and buggy compilers. */ | |
8797 | ||
8798 | retval = canon; | |
8799 | } | |
8800 | else | |
8801 | { | |
8802 | retval = physname; | |
8803 | need_copy = 0; | |
8804 | } | |
8805 | } | |
8806 | else | |
8807 | retval = canon; | |
8808 | ||
8809 | if (need_copy) | |
224c3ddb SM |
8810 | retval = ((const char *) |
8811 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
8812 | retval, strlen (retval))); | |
900e11f9 JK |
8813 | |
8814 | do_cleanups (back_to); | |
8815 | return retval; | |
0114d602 DJ |
8816 | } |
8817 | ||
74921315 KS |
8818 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
8819 | a new symbol for it. | |
8820 | ||
8821 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
8822 | ||
8823 | static int | |
8824 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
8825 | { | |
8826 | struct attribute *attr; | |
8827 | ||
8828 | /* If the die does not have a name, this is not a namespace | |
8829 | alias. */ | |
8830 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8831 | if (attr != NULL) | |
8832 | { | |
8833 | int num; | |
8834 | struct die_info *d = die; | |
8835 | struct dwarf2_cu *imported_cu = cu; | |
8836 | ||
8837 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
8838 | keep inspecting DIEs until we hit the underlying import. */ | |
8839 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
8840 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
8841 | { | |
8842 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
8843 | if (attr == NULL) | |
8844 | break; | |
8845 | ||
8846 | d = follow_die_ref (d, attr, &imported_cu); | |
8847 | if (d->tag != DW_TAG_imported_declaration) | |
8848 | break; | |
8849 | } | |
8850 | ||
8851 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
8852 | { | |
8853 | complaint (&symfile_complaints, | |
8854 | _("DIE at 0x%x has too many recursively imported " | |
8855 | "declarations"), d->offset.sect_off); | |
8856 | return 0; | |
8857 | } | |
8858 | ||
8859 | if (attr != NULL) | |
8860 | { | |
8861 | struct type *type; | |
8862 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
8863 | ||
8864 | type = get_die_type_at_offset (offset, cu->per_cu); | |
8865 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
8866 | { | |
8867 | /* This declaration is a global namespace alias. Add | |
8868 | a symbol for it whose type is the aliased namespace. */ | |
8869 | new_symbol (die, type, cu); | |
8870 | return 1; | |
8871 | } | |
8872 | } | |
8873 | } | |
8874 | ||
8875 | return 0; | |
8876 | } | |
8877 | ||
22cee43f PMR |
8878 | /* Return the using directives repository (global or local?) to use in the |
8879 | current context for LANGUAGE. | |
8880 | ||
8881 | For Ada, imported declarations can materialize renamings, which *may* be | |
8882 | global. However it is impossible (for now?) in DWARF to distinguish | |
8883 | "external" imported declarations and "static" ones. As all imported | |
8884 | declarations seem to be static in all other languages, make them all CU-wide | |
8885 | global only in Ada. */ | |
8886 | ||
8887 | static struct using_direct ** | |
8888 | using_directives (enum language language) | |
8889 | { | |
8890 | if (language == language_ada && context_stack_depth == 0) | |
8891 | return &global_using_directives; | |
8892 | else | |
8893 | return &local_using_directives; | |
8894 | } | |
8895 | ||
27aa8d6a SW |
8896 | /* Read the import statement specified by the given die and record it. */ |
8897 | ||
8898 | static void | |
8899 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8900 | { | |
bb5ed363 | 8901 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8902 | struct attribute *import_attr; |
32019081 | 8903 | struct die_info *imported_die, *child_die; |
de4affc9 | 8904 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8905 | const char *imported_name; |
794684b6 | 8906 | const char *imported_name_prefix; |
13387711 SW |
8907 | const char *canonical_name; |
8908 | const char *import_alias; | |
8909 | const char *imported_declaration = NULL; | |
794684b6 | 8910 | const char *import_prefix; |
32019081 JK |
8911 | VEC (const_char_ptr) *excludes = NULL; |
8912 | struct cleanup *cleanups; | |
13387711 | 8913 | |
27aa8d6a SW |
8914 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8915 | if (import_attr == NULL) | |
8916 | { | |
8917 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8918 | dwarf_tag_name (die->tag)); | |
8919 | return; | |
8920 | } | |
8921 | ||
de4affc9 CC |
8922 | imported_cu = cu; |
8923 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8924 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8925 | if (imported_name == NULL) |
8926 | { | |
8927 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8928 | ||
8929 | The import in the following code: | |
8930 | namespace A | |
8931 | { | |
8932 | typedef int B; | |
8933 | } | |
8934 | ||
8935 | int main () | |
8936 | { | |
8937 | using A::B; | |
8938 | B b; | |
8939 | return b; | |
8940 | } | |
8941 | ||
8942 | ... | |
8943 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8944 | <52> DW_AT_decl_file : 1 | |
8945 | <53> DW_AT_decl_line : 6 | |
8946 | <54> DW_AT_import : <0x75> | |
8947 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8948 | <59> DW_AT_name : B | |
8949 | <5b> DW_AT_decl_file : 1 | |
8950 | <5c> DW_AT_decl_line : 2 | |
8951 | <5d> DW_AT_type : <0x6e> | |
8952 | ... | |
8953 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8954 | <76> DW_AT_byte_size : 4 | |
8955 | <77> DW_AT_encoding : 5 (signed) | |
8956 | ||
8957 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8958 | This case will be ignored until the gcc bug is fixed. */ | |
8959 | return; | |
8960 | } | |
8961 | ||
82856980 SW |
8962 | /* Figure out the local name after import. */ |
8963 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8964 | |
794684b6 SW |
8965 | /* Figure out where the statement is being imported to. */ |
8966 | import_prefix = determine_prefix (die, cu); | |
8967 | ||
8968 | /* Figure out what the scope of the imported die is and prepend it | |
8969 | to the name of the imported die. */ | |
de4affc9 | 8970 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8971 | |
f55ee35c JK |
8972 | if (imported_die->tag != DW_TAG_namespace |
8973 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8974 | { |
13387711 SW |
8975 | imported_declaration = imported_name; |
8976 | canonical_name = imported_name_prefix; | |
794684b6 | 8977 | } |
13387711 | 8978 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 8979 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
8980 | imported_name_prefix, |
8981 | (cu->language == language_d ? "." : "::"), | |
8982 | imported_name, (char *) NULL); | |
13387711 SW |
8983 | else |
8984 | canonical_name = imported_name; | |
794684b6 | 8985 | |
32019081 JK |
8986 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8987 | ||
8988 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8989 | for (child_die = die->child; child_die && child_die->tag; | |
8990 | child_die = sibling_die (child_die)) | |
8991 | { | |
8992 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8993 | represented by an imported module entry with an import attribute | |
8994 | referring to the module and owned entries corresponding to those | |
8995 | entities that are renamed as part of being imported. */ | |
8996 | ||
8997 | if (child_die->tag != DW_TAG_imported_declaration) | |
8998 | { | |
8999 | complaint (&symfile_complaints, | |
9000 | _("child DW_TAG_imported_declaration expected " | |
9001 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 9002 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
9003 | continue; |
9004 | } | |
9005 | ||
9006 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9007 | if (import_attr == NULL) | |
9008 | { | |
9009 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9010 | dwarf_tag_name (child_die->tag)); | |
9011 | continue; | |
9012 | } | |
9013 | ||
9014 | imported_cu = cu; | |
9015 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9016 | &imported_cu); | |
9017 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9018 | if (imported_name == NULL) | |
9019 | { | |
9020 | complaint (&symfile_complaints, | |
9021 | _("child DW_TAG_imported_declaration has unknown " | |
9022 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 9023 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
9024 | continue; |
9025 | } | |
9026 | ||
9027 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
9028 | ||
9029 | process_die (child_die, cu); | |
9030 | } | |
9031 | ||
22cee43f PMR |
9032 | add_using_directive (using_directives (cu->language), |
9033 | import_prefix, | |
9034 | canonical_name, | |
9035 | import_alias, | |
9036 | imported_declaration, | |
9037 | excludes, | |
9038 | 0, | |
9039 | &objfile->objfile_obstack); | |
32019081 JK |
9040 | |
9041 | do_cleanups (cleanups); | |
27aa8d6a SW |
9042 | } |
9043 | ||
f4dc4d17 | 9044 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 9045 | |
cb1df416 DJ |
9046 | static void |
9047 | free_cu_line_header (void *arg) | |
9048 | { | |
9a3c8263 | 9049 | struct dwarf2_cu *cu = (struct dwarf2_cu *) arg; |
cb1df416 DJ |
9050 | |
9051 | free_line_header (cu->line_header); | |
9052 | cu->line_header = NULL; | |
9053 | } | |
9054 | ||
1b80a9fa JK |
9055 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9056 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9057 | this, it was first present in GCC release 4.3.0. */ | |
9058 | ||
9059 | static int | |
9060 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9061 | { | |
9062 | if (!cu->checked_producer) | |
9063 | check_producer (cu); | |
9064 | ||
9065 | return cu->producer_is_gcc_lt_4_3; | |
9066 | } | |
9067 | ||
9291a0cd TT |
9068 | static void |
9069 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 9070 | const char **name, const char **comp_dir) |
9291a0cd | 9071 | { |
9291a0cd TT |
9072 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9073 | is not a source language identifier. */ | |
7d45c7c3 KB |
9074 | *name = dwarf2_string_attr (die, DW_AT_name, cu); |
9075 | *comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9076 | |
7d45c7c3 KB |
9077 | if (*comp_dir == NULL |
9078 | && producer_is_gcc_lt_4_3 (cu) && *name != NULL | |
9079 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 9080 | { |
15d034d0 TT |
9081 | char *d = ldirname (*name); |
9082 | ||
9083 | *comp_dir = d; | |
9084 | if (d != NULL) | |
9085 | make_cleanup (xfree, d); | |
9291a0cd TT |
9086 | } |
9087 | if (*comp_dir != NULL) | |
9088 | { | |
9089 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9090 | directory, get rid of it. */ | |
e6a959d6 | 9091 | const char *cp = strchr (*comp_dir, ':'); |
9291a0cd TT |
9092 | |
9093 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
9094 | *comp_dir = cp + 1; | |
9095 | } | |
9096 | ||
9097 | if (*name == NULL) | |
9098 | *name = "<unknown>"; | |
9099 | } | |
9100 | ||
f4dc4d17 DE |
9101 | /* Handle DW_AT_stmt_list for a compilation unit. |
9102 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9103 | COMP_DIR is the compilation directory. LOWPC is passed to |
9104 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9105 | |
9106 | static void | |
9107 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9108 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9109 | { |
527f3840 | 9110 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9111 | struct attribute *attr; |
527f3840 JK |
9112 | unsigned int line_offset; |
9113 | struct line_header line_header_local; | |
9114 | hashval_t line_header_local_hash; | |
9115 | unsigned u; | |
9116 | void **slot; | |
9117 | int decode_mapping; | |
2ab95328 | 9118 | |
f4dc4d17 DE |
9119 | gdb_assert (! cu->per_cu->is_debug_types); |
9120 | ||
2ab95328 | 9121 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9122 | if (attr == NULL) |
9123 | return; | |
9124 | ||
9125 | line_offset = DW_UNSND (attr); | |
9126 | ||
9127 | /* The line header hash table is only created if needed (it exists to | |
9128 | prevent redundant reading of the line table for partial_units). | |
9129 | If we're given a partial_unit, we'll need it. If we're given a | |
9130 | compile_unit, then use the line header hash table if it's already | |
9131 | created, but don't create one just yet. */ | |
9132 | ||
9133 | if (dwarf2_per_objfile->line_header_hash == NULL | |
9134 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 9135 | { |
527f3840 JK |
9136 | dwarf2_per_objfile->line_header_hash |
9137 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
9138 | line_header_eq_voidp, | |
9139 | free_line_header_voidp, | |
9140 | &objfile->objfile_obstack, | |
9141 | hashtab_obstack_allocate, | |
9142 | dummy_obstack_deallocate); | |
9143 | } | |
2ab95328 | 9144 | |
527f3840 JK |
9145 | line_header_local.offset.sect_off = line_offset; |
9146 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; | |
9147 | line_header_local_hash = line_header_hash (&line_header_local); | |
9148 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
9149 | { | |
9150 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9151 | &line_header_local, | |
9152 | line_header_local_hash, NO_INSERT); | |
9153 | ||
9154 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
9155 | is not present in *SLOT (since if there is something in *SLOT then | |
9156 | it will be for a partial_unit). */ | |
9157 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 9158 | { |
527f3840 | 9159 | gdb_assert (*slot != NULL); |
9a3c8263 | 9160 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 9161 | return; |
dee91e82 | 9162 | } |
2ab95328 | 9163 | } |
527f3840 JK |
9164 | |
9165 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
9166 | We always have to call also dwarf_decode_lines for it. */ | |
9167 | cu->line_header = dwarf_decode_line_header (line_offset, cu); | |
9168 | if (cu->line_header == NULL) | |
9169 | return; | |
9170 | ||
9171 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
9172 | slot = NULL; | |
9173 | else | |
9174 | { | |
9175 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9176 | &line_header_local, | |
9177 | line_header_local_hash, INSERT); | |
9178 | gdb_assert (slot != NULL); | |
9179 | } | |
9180 | if (slot != NULL && *slot == NULL) | |
9181 | { | |
9182 | /* This newly decoded line number information unit will be owned | |
9183 | by line_header_hash hash table. */ | |
9184 | *slot = cu->line_header; | |
9185 | } | |
9186 | else | |
9187 | { | |
9188 | /* We cannot free any current entry in (*slot) as that struct line_header | |
9189 | may be already used by multiple CUs. Create only temporary decoded | |
9190 | line_header for this CU - it may happen at most once for each line | |
9191 | number information unit. And if we're not using line_header_hash | |
9192 | then this is what we want as well. */ | |
9193 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
9194 | make_cleanup (free_cu_line_header, cu); | |
9195 | } | |
9196 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
9197 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
9198 | decode_mapping); | |
2ab95328 TT |
9199 | } |
9200 | ||
95554aad | 9201 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 9202 | |
c906108c | 9203 | static void |
e7c27a73 | 9204 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9205 | { |
dee91e82 | 9206 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 9207 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
debd256d | 9208 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 9209 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9210 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9211 | struct attribute *attr; | |
15d034d0 TT |
9212 | const char *name = NULL; |
9213 | const char *comp_dir = NULL; | |
c906108c | 9214 | struct die_info *child_die; |
e142c38c | 9215 | CORE_ADDR baseaddr; |
6e70227d | 9216 | |
e142c38c | 9217 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9218 | |
fae299cd | 9219 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9220 | |
9221 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9222 | from finish_block. */ | |
2acceee2 | 9223 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 9224 | lowpc = highpc; |
3e29f34a | 9225 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 9226 | |
9291a0cd | 9227 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 9228 | |
95554aad | 9229 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9230 | |
f4b8a18d KW |
9231 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9232 | standardised yet. As a workaround for the language detection we fall | |
9233 | back to the DW_AT_producer string. */ | |
9234 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9235 | cu->language = language_opencl; | |
9236 | ||
3019eac3 DE |
9237 | /* Similar hack for Go. */ |
9238 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9239 | set_cu_language (DW_LANG_Go, cu); | |
9240 | ||
f4dc4d17 | 9241 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
9242 | |
9243 | /* Decode line number information if present. We do this before | |
9244 | processing child DIEs, so that the line header table is available | |
9245 | for DW_AT_decl_file. */ | |
c3b7b696 | 9246 | handle_DW_AT_stmt_list (die, cu, comp_dir, lowpc); |
3019eac3 DE |
9247 | |
9248 | /* Process all dies in compilation unit. */ | |
9249 | if (die->child != NULL) | |
9250 | { | |
9251 | child_die = die->child; | |
9252 | while (child_die && child_die->tag) | |
9253 | { | |
9254 | process_die (child_die, cu); | |
9255 | child_die = sibling_die (child_die); | |
9256 | } | |
9257 | } | |
9258 | ||
9259 | /* Decode macro information, if present. Dwarf 2 macro information | |
9260 | refers to information in the line number info statement program | |
9261 | header, so we can only read it if we've read the header | |
9262 | successfully. */ | |
9263 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
9264 | if (attr && cu->line_header) | |
9265 | { | |
9266 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9267 | complaint (&symfile_complaints, | |
9268 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
9269 | ||
43f3e411 | 9270 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
9271 | } |
9272 | else | |
9273 | { | |
9274 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9275 | if (attr && cu->line_header) | |
9276 | { | |
9277 | unsigned int macro_offset = DW_UNSND (attr); | |
9278 | ||
43f3e411 | 9279 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
9280 | } |
9281 | } | |
9282 | ||
9283 | do_cleanups (back_to); | |
9284 | } | |
9285 | ||
f4dc4d17 DE |
9286 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9287 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9288 | symtabs with another TU and the symtabs have already been created | |
9289 | then restore those symtabs in the line header. | |
9290 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9291 | |
9292 | static void | |
f4dc4d17 | 9293 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9294 | { |
f4dc4d17 DE |
9295 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
9296 | struct type_unit_group *tu_group; | |
9297 | int first_time; | |
9298 | struct line_header *lh; | |
3019eac3 | 9299 | struct attribute *attr; |
f4dc4d17 | 9300 | unsigned int i, line_offset; |
0186c6a7 | 9301 | struct signatured_type *sig_type; |
3019eac3 | 9302 | |
f4dc4d17 | 9303 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9304 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9305 | |
f4dc4d17 | 9306 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9307 | |
f4dc4d17 | 9308 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9309 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9310 | if (sig_type->type_unit_group == NULL) |
9311 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9312 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9313 | |
9314 | /* If we've already processed this stmt_list there's no real need to | |
9315 | do it again, we could fake it and just recreate the part we need | |
9316 | (file name,index -> symtab mapping). If data shows this optimization | |
9317 | is useful we can do it then. */ | |
43f3e411 | 9318 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
9319 | |
9320 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9321 | debug info. */ | |
9322 | lh = NULL; | |
9323 | if (attr != NULL) | |
3019eac3 | 9324 | { |
f4dc4d17 DE |
9325 | line_offset = DW_UNSND (attr); |
9326 | lh = dwarf_decode_line_header (line_offset, cu); | |
9327 | } | |
9328 | if (lh == NULL) | |
9329 | { | |
9330 | if (first_time) | |
9331 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9332 | else | |
9333 | { | |
9334 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 9335 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9336 | } |
f4dc4d17 | 9337 | return; |
3019eac3 DE |
9338 | } |
9339 | ||
f4dc4d17 DE |
9340 | cu->line_header = lh; |
9341 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 9342 | |
f4dc4d17 DE |
9343 | if (first_time) |
9344 | { | |
43f3e411 | 9345 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 9346 | |
1fd60fc0 DE |
9347 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
9348 | still initializing it, and our caller (a few levels up) | |
9349 | process_full_type_unit still needs to know if this is the first | |
9350 | time. */ | |
9351 | ||
f4dc4d17 DE |
9352 | tu_group->num_symtabs = lh->num_file_names; |
9353 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 9354 | |
f4dc4d17 DE |
9355 | for (i = 0; i < lh->num_file_names; ++i) |
9356 | { | |
d521ce57 | 9357 | const char *dir = NULL; |
f4dc4d17 | 9358 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 9359 | |
afa6c9ab | 9360 | if (fe->dir_index && lh->include_dirs != NULL) |
f4dc4d17 | 9361 | dir = lh->include_dirs[fe->dir_index - 1]; |
4d663531 | 9362 | dwarf2_start_subfile (fe->name, dir); |
3019eac3 | 9363 | |
f4dc4d17 DE |
9364 | if (current_subfile->symtab == NULL) |
9365 | { | |
9366 | /* NOTE: start_subfile will recognize when it's been passed | |
9367 | a file it has already seen. So we can't assume there's a | |
43f3e411 | 9368 | simple mapping from lh->file_names to subfiles, plus |
f4dc4d17 | 9369 | lh->file_names may contain dups. */ |
43f3e411 DE |
9370 | current_subfile->symtab |
9371 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
9372 | } |
9373 | ||
9374 | fe->symtab = current_subfile->symtab; | |
9375 | tu_group->symtabs[i] = fe->symtab; | |
9376 | } | |
9377 | } | |
9378 | else | |
3019eac3 | 9379 | { |
0ab9ce85 | 9380 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 DE |
9381 | |
9382 | for (i = 0; i < lh->num_file_names; ++i) | |
9383 | { | |
9384 | struct file_entry *fe = &lh->file_names[i]; | |
9385 | ||
9386 | fe->symtab = tu_group->symtabs[i]; | |
9387 | } | |
3019eac3 DE |
9388 | } |
9389 | ||
f4dc4d17 DE |
9390 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9391 | so they don't have a "real" (so to speak) symtab anyway. | |
9392 | There is later code that will assign the main symtab to all symbols | |
9393 | that don't have one. We need to handle the case of a symbol with a | |
9394 | missing symtab (DW_AT_decl_file) anyway. */ | |
9395 | } | |
3019eac3 | 9396 | |
f4dc4d17 DE |
9397 | /* Process DW_TAG_type_unit. |
9398 | For TUs we want to skip the first top level sibling if it's not the | |
9399 | actual type being defined by this TU. In this case the first top | |
9400 | level sibling is there to provide context only. */ | |
3019eac3 | 9401 | |
f4dc4d17 DE |
9402 | static void |
9403 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9404 | { | |
9405 | struct die_info *child_die; | |
3019eac3 | 9406 | |
f4dc4d17 DE |
9407 | prepare_one_comp_unit (cu, die, language_minimal); |
9408 | ||
9409 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9410 | We do this before processing child DIEs, so that the line header table | |
9411 | is available for DW_AT_decl_file. */ | |
9412 | setup_type_unit_groups (die, cu); | |
9413 | ||
9414 | if (die->child != NULL) | |
9415 | { | |
9416 | child_die = die->child; | |
9417 | while (child_die && child_die->tag) | |
9418 | { | |
9419 | process_die (child_die, cu); | |
9420 | child_die = sibling_die (child_die); | |
9421 | } | |
9422 | } | |
3019eac3 DE |
9423 | } |
9424 | \f | |
80626a55 DE |
9425 | /* DWO/DWP files. |
9426 | ||
9427 | http://gcc.gnu.org/wiki/DebugFission | |
9428 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9429 | ||
9430 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9431 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9432 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9433 | |
9434 | static hashval_t | |
9435 | hash_dwo_file (const void *item) | |
9436 | { | |
9a3c8263 | 9437 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 9438 | hashval_t hash; |
3019eac3 | 9439 | |
a2ce51a0 DE |
9440 | hash = htab_hash_string (dwo_file->dwo_name); |
9441 | if (dwo_file->comp_dir != NULL) | |
9442 | hash += htab_hash_string (dwo_file->comp_dir); | |
9443 | return hash; | |
3019eac3 DE |
9444 | } |
9445 | ||
9446 | static int | |
9447 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9448 | { | |
9a3c8263 SM |
9449 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
9450 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 9451 | |
a2ce51a0 DE |
9452 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9453 | return 0; | |
9454 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9455 | return lhs->comp_dir == rhs->comp_dir; | |
9456 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9457 | } |
9458 | ||
9459 | /* Allocate a hash table for DWO files. */ | |
9460 | ||
9461 | static htab_t | |
9462 | allocate_dwo_file_hash_table (void) | |
9463 | { | |
9464 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9465 | ||
9466 | return htab_create_alloc_ex (41, | |
9467 | hash_dwo_file, | |
9468 | eq_dwo_file, | |
9469 | NULL, | |
9470 | &objfile->objfile_obstack, | |
9471 | hashtab_obstack_allocate, | |
9472 | dummy_obstack_deallocate); | |
9473 | } | |
9474 | ||
80626a55 DE |
9475 | /* Lookup DWO file DWO_NAME. */ |
9476 | ||
9477 | static void ** | |
0ac5b59e | 9478 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9479 | { |
9480 | struct dwo_file find_entry; | |
9481 | void **slot; | |
9482 | ||
9483 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9484 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9485 | ||
9486 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9487 | find_entry.dwo_name = dwo_name; |
9488 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9489 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9490 | ||
9491 | return slot; | |
9492 | } | |
9493 | ||
3019eac3 DE |
9494 | static hashval_t |
9495 | hash_dwo_unit (const void *item) | |
9496 | { | |
9a3c8263 | 9497 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
9498 | |
9499 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9500 | return dwo_unit->signature; | |
9501 | } | |
9502 | ||
9503 | static int | |
9504 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9505 | { | |
9a3c8263 SM |
9506 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
9507 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
9508 | |
9509 | /* The signature is assumed to be unique within the DWO file. | |
9510 | So while object file CU dwo_id's always have the value zero, | |
9511 | that's OK, assuming each object file DWO file has only one CU, | |
9512 | and that's the rule for now. */ | |
9513 | return lhs->signature == rhs->signature; | |
9514 | } | |
9515 | ||
9516 | /* Allocate a hash table for DWO CUs,TUs. | |
9517 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9518 | ||
9519 | static htab_t | |
9520 | allocate_dwo_unit_table (struct objfile *objfile) | |
9521 | { | |
9522 | /* Start out with a pretty small number. | |
9523 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9524 | return htab_create_alloc_ex (3, | |
9525 | hash_dwo_unit, | |
9526 | eq_dwo_unit, | |
9527 | NULL, | |
9528 | &objfile->objfile_obstack, | |
9529 | hashtab_obstack_allocate, | |
9530 | dummy_obstack_deallocate); | |
9531 | } | |
9532 | ||
80626a55 | 9533 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9534 | |
19c3d4c9 | 9535 | struct create_dwo_cu_data |
3019eac3 DE |
9536 | { |
9537 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9538 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9539 | }; |
9540 | ||
19c3d4c9 | 9541 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9542 | |
9543 | static void | |
19c3d4c9 DE |
9544 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9545 | const gdb_byte *info_ptr, | |
9546 | struct die_info *comp_unit_die, | |
9547 | int has_children, | |
9548 | void *datap) | |
3019eac3 DE |
9549 | { |
9550 | struct dwarf2_cu *cu = reader->cu; | |
3019eac3 | 9551 | sect_offset offset = cu->per_cu->offset; |
8a0459fd | 9552 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 9553 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 9554 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9555 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9556 | struct attribute *attr; |
3019eac3 DE |
9557 | |
9558 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9559 | if (attr == NULL) | |
9560 | { | |
19c3d4c9 DE |
9561 | complaint (&symfile_complaints, |
9562 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9563 | " its dwo_id [in module %s]"), | |
9564 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
9565 | return; |
9566 | } | |
9567 | ||
3019eac3 DE |
9568 | dwo_unit->dwo_file = dwo_file; |
9569 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9570 | dwo_unit->section = section; |
3019eac3 DE |
9571 | dwo_unit->offset = offset; |
9572 | dwo_unit->length = cu->per_cu->length; | |
9573 | ||
b4f54984 | 9574 | if (dwarf_read_debug) |
4031ecc5 DE |
9575 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9576 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9577 | } |
9578 | ||
19c3d4c9 DE |
9579 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
9580 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 9581 | |
19c3d4c9 DE |
9582 | static struct dwo_unit * |
9583 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
9584 | { |
9585 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9586 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
d521ce57 | 9587 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
9588 | struct create_dwo_cu_data create_dwo_cu_data; |
9589 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
9590 | |
9591 | dwarf2_read_section (objfile, section); | |
9592 | info_ptr = section->buffer; | |
9593 | ||
9594 | if (info_ptr == NULL) | |
9595 | return NULL; | |
9596 | ||
b4f54984 | 9597 | if (dwarf_read_debug) |
19c3d4c9 DE |
9598 | { |
9599 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
a32a8923 DE |
9600 | get_section_name (section), |
9601 | get_section_file_name (section)); | |
19c3d4c9 | 9602 | } |
3019eac3 | 9603 | |
19c3d4c9 DE |
9604 | create_dwo_cu_data.dwo_file = dwo_file; |
9605 | dwo_unit = NULL; | |
3019eac3 DE |
9606 | |
9607 | end_ptr = info_ptr + section->size; | |
9608 | while (info_ptr < end_ptr) | |
9609 | { | |
9610 | struct dwarf2_per_cu_data per_cu; | |
9611 | ||
19c3d4c9 DE |
9612 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9613 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9614 | memset (&per_cu, 0, sizeof (per_cu)); |
9615 | per_cu.objfile = objfile; | |
9616 | per_cu.is_debug_types = 0; | |
9617 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 9618 | per_cu.section = section; |
3019eac3 | 9619 | |
33e80786 | 9620 | init_cutu_and_read_dies_no_follow (&per_cu, dwo_file, |
19c3d4c9 DE |
9621 | create_dwo_cu_reader, |
9622 | &create_dwo_cu_data); | |
9623 | ||
9624 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
9625 | { | |
9626 | /* If we've already found one, complain. We only support one | |
9627 | because having more than one requires hacking the dwo_name of | |
9628 | each to match, which is highly unlikely to happen. */ | |
9629 | if (dwo_unit != NULL) | |
9630 | { | |
9631 | complaint (&symfile_complaints, | |
9632 | _("Multiple CUs in DWO file %s [in module %s]"), | |
4262abfb | 9633 | dwo_file->dwo_name, objfile_name (objfile)); |
19c3d4c9 DE |
9634 | break; |
9635 | } | |
9636 | ||
9637 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9638 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9639 | } | |
3019eac3 DE |
9640 | |
9641 | info_ptr += per_cu.length; | |
9642 | } | |
9643 | ||
19c3d4c9 | 9644 | return dwo_unit; |
3019eac3 DE |
9645 | } |
9646 | ||
80626a55 DE |
9647 | /* DWP file .debug_{cu,tu}_index section format: |
9648 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9649 | ||
d2415c6c DE |
9650 | DWP Version 1: |
9651 | ||
80626a55 DE |
9652 | Both index sections have the same format, and serve to map a 64-bit |
9653 | signature to a set of section numbers. Each section begins with a header, | |
9654 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9655 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9656 | aligned at 8-byte boundaries in the file. | |
9657 | ||
d2415c6c DE |
9658 | The index section header consists of: |
9659 | ||
9660 | V, 32 bit version number | |
9661 | -, 32 bits unused | |
9662 | N, 32 bit number of compilation units or type units in the index | |
9663 | M, 32 bit number of slots in the hash table | |
80626a55 | 9664 | |
d2415c6c | 9665 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9666 | |
d2415c6c DE |
9667 | The hash table begins at offset 16 in the section, and consists of an array |
9668 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9669 | order of the application binary). Unused slots in the hash table are 0. | |
9670 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9671 | |
d2415c6c DE |
9672 | The parallel table begins immediately after the hash table |
9673 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9674 | array of 32-bit indexes (using the byte order of the application binary), | |
9675 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9676 | table contains a 32-bit index into the pool of section numbers. For unused | |
9677 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9678 | |
73869dc2 DE |
9679 | The pool of section numbers begins immediately following the hash table |
9680 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9681 | section numbers consists of an array of 32-bit words (using the byte order | |
9682 | of the application binary). Each item in the array is indexed starting | |
9683 | from 0. The hash table entry provides the index of the first section | |
9684 | number in the set. Additional section numbers in the set follow, and the | |
9685 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9686 | ||
9687 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9688 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9689 | be the second entry. Other members of the set may follow in any order. | |
9690 | ||
9691 | --- | |
9692 | ||
9693 | DWP Version 2: | |
9694 | ||
9695 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9696 | and the entries in the index tables are now offsets into these sections. | |
9697 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9698 | section. | |
9699 | ||
9700 | Index Section Contents: | |
9701 | Header | |
9702 | Hash Table of Signatures dwp_hash_table.hash_table | |
9703 | Parallel Table of Indices dwp_hash_table.unit_table | |
9704 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
9705 | Table of Section Sizes dwp_hash_table.v2.sizes | |
9706 | ||
9707 | The index section header consists of: | |
9708 | ||
9709 | V, 32 bit version number | |
9710 | L, 32 bit number of columns in the table of section offsets | |
9711 | N, 32 bit number of compilation units or type units in the index | |
9712 | M, 32 bit number of slots in the hash table | |
9713 | ||
9714 | Numbers are recorded using the byte order of the application binary. | |
9715 | ||
9716 | The hash table has the same format as version 1. | |
9717 | The parallel table of indices has the same format as version 1, | |
9718 | except that the entries are origin-1 indices into the table of sections | |
9719 | offsets and the table of section sizes. | |
9720 | ||
9721 | The table of offsets begins immediately following the parallel table | |
9722 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
9723 | a two-dimensional array of 32-bit words (using the byte order of the | |
9724 | application binary), with L columns and N+1 rows, in row-major order. | |
9725 | Each row in the array is indexed starting from 0. The first row provides | |
9726 | a key to the remaining rows: each column in this row provides an identifier | |
9727 | for a debug section, and the offsets in the same column of subsequent rows | |
9728 | refer to that section. The section identifiers are: | |
9729 | ||
9730 | DW_SECT_INFO 1 .debug_info.dwo | |
9731 | DW_SECT_TYPES 2 .debug_types.dwo | |
9732 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
9733 | DW_SECT_LINE 4 .debug_line.dwo | |
9734 | DW_SECT_LOC 5 .debug_loc.dwo | |
9735 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
9736 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
9737 | DW_SECT_MACRO 8 .debug_macro.dwo | |
9738 | ||
9739 | The offsets provided by the CU and TU index sections are the base offsets | |
9740 | for the contributions made by each CU or TU to the corresponding section | |
9741 | in the package file. Each CU and TU header contains an abbrev_offset | |
9742 | field, used to find the abbreviations table for that CU or TU within the | |
9743 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
9744 | be interpreted as relative to the base offset given in the index section. | |
9745 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
9746 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
9747 | and offsets into other debug sections obtained from DWARF attributes should | |
9748 | also be interpreted as relative to the corresponding base offset. | |
9749 | ||
9750 | The table of sizes begins immediately following the table of offsets. | |
9751 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
9752 | with L columns and N rows, in row-major order. Each row in the array is | |
9753 | indexed starting from 1 (row 0 is shared by the two tables). | |
9754 | ||
9755 | --- | |
9756 | ||
9757 | Hash table lookup is handled the same in version 1 and 2: | |
9758 | ||
9759 | We assume that N and M will not exceed 2^32 - 1. | |
9760 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
9761 | ||
d2415c6c DE |
9762 | Given a 64-bit compilation unit signature or a type signature S, an entry |
9763 | in the hash table is located as follows: | |
80626a55 | 9764 | |
d2415c6c DE |
9765 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
9766 | the low-order k bits all set to 1. | |
80626a55 | 9767 | |
d2415c6c | 9768 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 9769 | |
d2415c6c DE |
9770 | 3) If the hash table entry at index H matches the signature, use that |
9771 | entry. If the hash table entry at index H is unused (all zeroes), | |
9772 | terminate the search: the signature is not present in the table. | |
80626a55 | 9773 | |
d2415c6c | 9774 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 9775 | |
d2415c6c | 9776 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 9777 | to stop at an unused slot or find the match. */ |
80626a55 DE |
9778 | |
9779 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
9780 | .debug_{info,types}.dwo in DWP_FILE. | |
9781 | Returns NULL if there isn't one. | |
9782 | Note: This function processes DWP files only, not DWO files. */ | |
9783 | ||
9784 | static struct dwp_hash_table * | |
9785 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
9786 | { | |
9787 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9788 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 9789 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 9790 | struct dwarf2_section_info *index; |
73869dc2 | 9791 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
9792 | struct dwp_hash_table *htab; |
9793 | ||
9794 | if (is_debug_types) | |
9795 | index = &dwp_file->sections.tu_index; | |
9796 | else | |
9797 | index = &dwp_file->sections.cu_index; | |
9798 | ||
9799 | if (dwarf2_section_empty_p (index)) | |
9800 | return NULL; | |
9801 | dwarf2_read_section (objfile, index); | |
9802 | ||
9803 | index_ptr = index->buffer; | |
9804 | index_end = index_ptr + index->size; | |
9805 | ||
9806 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
9807 | index_ptr += 4; |
9808 | if (version == 2) | |
9809 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
9810 | else | |
9811 | nr_columns = 0; | |
9812 | index_ptr += 4; | |
80626a55 DE |
9813 | nr_units = read_4_bytes (dbfd, index_ptr); |
9814 | index_ptr += 4; | |
9815 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
9816 | index_ptr += 4; | |
9817 | ||
73869dc2 | 9818 | if (version != 1 && version != 2) |
80626a55 | 9819 | { |
21aa081e | 9820 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 9821 | " [in module %s]"), |
21aa081e | 9822 | pulongest (version), dwp_file->name); |
80626a55 DE |
9823 | } |
9824 | if (nr_slots != (nr_slots & -nr_slots)) | |
9825 | { | |
21aa081e | 9826 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 9827 | " is not power of 2 [in module %s]"), |
21aa081e | 9828 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
9829 | } |
9830 | ||
9831 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
9832 | htab->version = version; |
9833 | htab->nr_columns = nr_columns; | |
80626a55 DE |
9834 | htab->nr_units = nr_units; |
9835 | htab->nr_slots = nr_slots; | |
9836 | htab->hash_table = index_ptr; | |
9837 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
9838 | |
9839 | /* Exit early if the table is empty. */ | |
9840 | if (nr_slots == 0 || nr_units == 0 | |
9841 | || (version == 2 && nr_columns == 0)) | |
9842 | { | |
9843 | /* All must be zero. */ | |
9844 | if (nr_slots != 0 || nr_units != 0 | |
9845 | || (version == 2 && nr_columns != 0)) | |
9846 | { | |
9847 | complaint (&symfile_complaints, | |
9848 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
9849 | " all zero [in modules %s]"), | |
9850 | dwp_file->name); | |
9851 | } | |
9852 | return htab; | |
9853 | } | |
9854 | ||
9855 | if (version == 1) | |
9856 | { | |
9857 | htab->section_pool.v1.indices = | |
9858 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9859 | /* It's harder to decide whether the section is too small in v1. | |
9860 | V1 is deprecated anyway so we punt. */ | |
9861 | } | |
9862 | else | |
9863 | { | |
9864 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9865 | int *ids = htab->section_pool.v2.section_ids; | |
9866 | /* Reverse map for error checking. */ | |
9867 | int ids_seen[DW_SECT_MAX + 1]; | |
9868 | int i; | |
9869 | ||
9870 | if (nr_columns < 2) | |
9871 | { | |
9872 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
9873 | " in section table [in module %s]"), | |
9874 | dwp_file->name); | |
9875 | } | |
9876 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
9877 | { | |
9878 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
9879 | " in section table [in module %s]"), | |
9880 | dwp_file->name); | |
9881 | } | |
9882 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9883 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9884 | for (i = 0; i < nr_columns; ++i) | |
9885 | { | |
9886 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
9887 | ||
9888 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
9889 | { | |
9890 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
9891 | " in section table [in module %s]"), | |
9892 | id, dwp_file->name); | |
9893 | } | |
9894 | if (ids_seen[id] != -1) | |
9895 | { | |
9896 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
9897 | " id %d in section table [in module %s]"), | |
9898 | id, dwp_file->name); | |
9899 | } | |
9900 | ids_seen[id] = i; | |
9901 | ids[i] = id; | |
9902 | } | |
9903 | /* Must have exactly one info or types section. */ | |
9904 | if (((ids_seen[DW_SECT_INFO] != -1) | |
9905 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
9906 | != 1) | |
9907 | { | |
9908 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
9909 | " DWO info/types section [in module %s]"), | |
9910 | dwp_file->name); | |
9911 | } | |
9912 | /* Must have an abbrev section. */ | |
9913 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
9914 | { | |
9915 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
9916 | " section [in module %s]"), | |
9917 | dwp_file->name); | |
9918 | } | |
9919 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
9920 | htab->section_pool.v2.sizes = | |
9921 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
9922 | * nr_units * nr_columns); | |
9923 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
9924 | * nr_units * nr_columns)) | |
9925 | > index_end) | |
9926 | { | |
9927 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
9928 | " [in module %s]"), | |
9929 | dwp_file->name); | |
9930 | } | |
9931 | } | |
80626a55 DE |
9932 | |
9933 | return htab; | |
9934 | } | |
9935 | ||
9936 | /* Update SECTIONS with the data from SECTP. | |
9937 | ||
9938 | This function is like the other "locate" section routines that are | |
9939 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 9940 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
9941 | |
9942 | The result is non-zero for success, or zero if an error was found. */ | |
9943 | ||
9944 | static int | |
73869dc2 DE |
9945 | locate_v1_virtual_dwo_sections (asection *sectp, |
9946 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
9947 | { |
9948 | const struct dwop_section_names *names = &dwop_section_names; | |
9949 | ||
9950 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9951 | { | |
9952 | /* There can be only one. */ | |
049412e3 | 9953 | if (sections->abbrev.s.section != NULL) |
80626a55 | 9954 | return 0; |
049412e3 | 9955 | sections->abbrev.s.section = sectp; |
80626a55 DE |
9956 | sections->abbrev.size = bfd_get_section_size (sectp); |
9957 | } | |
9958 | else if (section_is_p (sectp->name, &names->info_dwo) | |
9959 | || section_is_p (sectp->name, &names->types_dwo)) | |
9960 | { | |
9961 | /* There can be only one. */ | |
049412e3 | 9962 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 9963 | return 0; |
049412e3 | 9964 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
9965 | sections->info_or_types.size = bfd_get_section_size (sectp); |
9966 | } | |
9967 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9968 | { | |
9969 | /* There can be only one. */ | |
049412e3 | 9970 | if (sections->line.s.section != NULL) |
80626a55 | 9971 | return 0; |
049412e3 | 9972 | sections->line.s.section = sectp; |
80626a55 DE |
9973 | sections->line.size = bfd_get_section_size (sectp); |
9974 | } | |
9975 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9976 | { | |
9977 | /* There can be only one. */ | |
049412e3 | 9978 | if (sections->loc.s.section != NULL) |
80626a55 | 9979 | return 0; |
049412e3 | 9980 | sections->loc.s.section = sectp; |
80626a55 DE |
9981 | sections->loc.size = bfd_get_section_size (sectp); |
9982 | } | |
9983 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9984 | { | |
9985 | /* There can be only one. */ | |
049412e3 | 9986 | if (sections->macinfo.s.section != NULL) |
80626a55 | 9987 | return 0; |
049412e3 | 9988 | sections->macinfo.s.section = sectp; |
80626a55 DE |
9989 | sections->macinfo.size = bfd_get_section_size (sectp); |
9990 | } | |
9991 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9992 | { | |
9993 | /* There can be only one. */ | |
049412e3 | 9994 | if (sections->macro.s.section != NULL) |
80626a55 | 9995 | return 0; |
049412e3 | 9996 | sections->macro.s.section = sectp; |
80626a55 DE |
9997 | sections->macro.size = bfd_get_section_size (sectp); |
9998 | } | |
9999 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10000 | { | |
10001 | /* There can be only one. */ | |
049412e3 | 10002 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 10003 | return 0; |
049412e3 | 10004 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10005 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10006 | } | |
10007 | else | |
10008 | { | |
10009 | /* No other kind of section is valid. */ | |
10010 | return 0; | |
10011 | } | |
10012 | ||
10013 | return 1; | |
10014 | } | |
10015 | ||
73869dc2 DE |
10016 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10017 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10018 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10019 | This is for DWP version 1 files. */ | |
80626a55 DE |
10020 | |
10021 | static struct dwo_unit * | |
73869dc2 DE |
10022 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10023 | uint32_t unit_index, | |
10024 | const char *comp_dir, | |
10025 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10026 | { |
10027 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10028 | const struct dwp_hash_table *dwp_htab = |
10029 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10030 | bfd *dbfd = dwp_file->dbfd; |
10031 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10032 | struct dwo_file *dwo_file; | |
10033 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10034 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
10035 | void **dwo_file_slot; |
10036 | char *virtual_dwo_name; | |
80626a55 DE |
10037 | struct cleanup *cleanups; |
10038 | int i; | |
10039 | ||
73869dc2 DE |
10040 | gdb_assert (dwp_file->version == 1); |
10041 | ||
b4f54984 | 10042 | if (dwarf_read_debug) |
80626a55 | 10043 | { |
73869dc2 | 10044 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10045 | kind, |
73869dc2 | 10046 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10047 | dwp_file->name); |
10048 | } | |
10049 | ||
19ac8c2e | 10050 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10051 | Put a limit on the number of sections we look for so that bad data |
10052 | doesn't cause us to loop forever. */ | |
10053 | ||
73869dc2 | 10054 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10055 | (1 /* .debug_info or .debug_types */ \ |
10056 | + 1 /* .debug_abbrev */ \ | |
10057 | + 1 /* .debug_line */ \ | |
10058 | + 1 /* .debug_loc */ \ | |
10059 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10060 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10061 | + 1 /* trailing zero */) |
10062 | ||
10063 | memset (§ions, 0, sizeof (sections)); | |
10064 | cleanups = make_cleanup (null_cleanup, 0); | |
10065 | ||
73869dc2 | 10066 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10067 | { |
10068 | asection *sectp; | |
10069 | uint32_t section_nr = | |
10070 | read_4_bytes (dbfd, | |
73869dc2 DE |
10071 | dwp_htab->section_pool.v1.indices |
10072 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10073 | |
10074 | if (section_nr == 0) | |
10075 | break; | |
10076 | if (section_nr >= dwp_file->num_sections) | |
10077 | { | |
10078 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10079 | " [in module %s]"), | |
10080 | dwp_file->name); | |
10081 | } | |
10082 | ||
10083 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10084 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10085 | { |
10086 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10087 | " [in module %s]"), | |
10088 | dwp_file->name); | |
10089 | } | |
10090 | } | |
10091 | ||
10092 | if (i < 2 | |
a32a8923 DE |
10093 | || dwarf2_section_empty_p (§ions.info_or_types) |
10094 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10095 | { |
10096 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10097 | " [in module %s]"), | |
10098 | dwp_file->name); | |
10099 | } | |
73869dc2 | 10100 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10101 | { |
10102 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10103 | " [in module %s]"), | |
10104 | dwp_file->name); | |
10105 | } | |
10106 | ||
10107 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10108 | have dwo_unit "live" in that. At least for now. | |
10109 | ||
10110 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10111 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10112 | file, we can combine them back into a virtual DWO file to save space |
10113 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10114 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10115 | ||
2792b94d PM |
10116 | virtual_dwo_name = |
10117 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
10118 | get_section_id (§ions.abbrev), |
10119 | get_section_id (§ions.line), | |
10120 | get_section_id (§ions.loc), | |
10121 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
10122 | make_cleanup (xfree, virtual_dwo_name); |
10123 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 10124 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
10125 | /* Create one if necessary. */ |
10126 | if (*dwo_file_slot == NULL) | |
10127 | { | |
b4f54984 | 10128 | if (dwarf_read_debug) |
80626a55 DE |
10129 | { |
10130 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10131 | virtual_dwo_name); | |
10132 | } | |
10133 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10134 | dwo_file->dwo_name |
10135 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10136 | virtual_dwo_name, | |
10137 | strlen (virtual_dwo_name)); | |
0ac5b59e | 10138 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
10139 | dwo_file->sections.abbrev = sections.abbrev; |
10140 | dwo_file->sections.line = sections.line; | |
10141 | dwo_file->sections.loc = sections.loc; | |
10142 | dwo_file->sections.macinfo = sections.macinfo; | |
10143 | dwo_file->sections.macro = sections.macro; | |
10144 | dwo_file->sections.str_offsets = sections.str_offsets; | |
10145 | /* The "str" section is global to the entire DWP file. */ | |
10146 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 10147 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
10148 | there's no need to record it in dwo_file. |
10149 | Also, we can't simply record type sections in dwo_file because | |
10150 | we record a pointer into the vector in dwo_unit. As we collect more | |
10151 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
10152 | for it, invalidating all copies of pointers into the previous |
10153 | contents. */ | |
80626a55 DE |
10154 | *dwo_file_slot = dwo_file; |
10155 | } | |
10156 | else | |
10157 | { | |
b4f54984 | 10158 | if (dwarf_read_debug) |
80626a55 DE |
10159 | { |
10160 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10161 | virtual_dwo_name); | |
10162 | } | |
9a3c8263 | 10163 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 DE |
10164 | } |
10165 | do_cleanups (cleanups); | |
10166 | ||
10167 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10168 | dwo_unit->dwo_file = dwo_file; | |
10169 | dwo_unit->signature = signature; | |
8d749320 SM |
10170 | dwo_unit->section = |
10171 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 10172 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 10173 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
10174 | |
10175 | return dwo_unit; | |
10176 | } | |
10177 | ||
73869dc2 DE |
10178 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
10179 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
10180 | piece within that section used by a TU/CU, return a virtual section | |
10181 | of just that piece. */ | |
10182 | ||
10183 | static struct dwarf2_section_info | |
10184 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
10185 | bfd_size_type offset, bfd_size_type size) | |
10186 | { | |
10187 | struct dwarf2_section_info result; | |
10188 | asection *sectp; | |
10189 | ||
10190 | gdb_assert (section != NULL); | |
10191 | gdb_assert (!section->is_virtual); | |
10192 | ||
10193 | memset (&result, 0, sizeof (result)); | |
10194 | result.s.containing_section = section; | |
10195 | result.is_virtual = 1; | |
10196 | ||
10197 | if (size == 0) | |
10198 | return result; | |
10199 | ||
10200 | sectp = get_section_bfd_section (section); | |
10201 | ||
10202 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10203 | bounds of the real section. This is a pretty-rare event, so just | |
10204 | flag an error (easier) instead of a warning and trying to cope. */ | |
10205 | if (sectp == NULL | |
10206 | || offset + size > bfd_get_section_size (sectp)) | |
10207 | { | |
10208 | bfd *abfd = sectp->owner; | |
10209 | ||
10210 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10211 | " in section %s [in module %s]"), | |
10212 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10213 | objfile_name (dwarf2_per_objfile->objfile)); | |
10214 | } | |
10215 | ||
10216 | result.virtual_offset = offset; | |
10217 | result.size = size; | |
10218 | return result; | |
10219 | } | |
10220 | ||
10221 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10222 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10223 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10224 | This is for DWP version 2 files. */ | |
10225 | ||
10226 | static struct dwo_unit * | |
10227 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10228 | uint32_t unit_index, | |
10229 | const char *comp_dir, | |
10230 | ULONGEST signature, int is_debug_types) | |
10231 | { | |
10232 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10233 | const struct dwp_hash_table *dwp_htab = | |
10234 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10235 | bfd *dbfd = dwp_file->dbfd; | |
10236 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10237 | struct dwo_file *dwo_file; | |
10238 | struct dwo_unit *dwo_unit; | |
10239 | struct virtual_v2_dwo_sections sections; | |
10240 | void **dwo_file_slot; | |
10241 | char *virtual_dwo_name; | |
73869dc2 DE |
10242 | struct cleanup *cleanups; |
10243 | int i; | |
10244 | ||
10245 | gdb_assert (dwp_file->version == 2); | |
10246 | ||
b4f54984 | 10247 | if (dwarf_read_debug) |
73869dc2 DE |
10248 | { |
10249 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10250 | kind, | |
10251 | pulongest (unit_index), hex_string (signature), | |
10252 | dwp_file->name); | |
10253 | } | |
10254 | ||
10255 | /* Fetch the section offsets of this DWO unit. */ | |
10256 | ||
10257 | memset (§ions, 0, sizeof (sections)); | |
10258 | cleanups = make_cleanup (null_cleanup, 0); | |
10259 | ||
10260 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10261 | { | |
10262 | uint32_t offset = read_4_bytes (dbfd, | |
10263 | dwp_htab->section_pool.v2.offsets | |
10264 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10265 | + i) | |
10266 | * sizeof (uint32_t))); | |
10267 | uint32_t size = read_4_bytes (dbfd, | |
10268 | dwp_htab->section_pool.v2.sizes | |
10269 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10270 | + i) | |
10271 | * sizeof (uint32_t))); | |
10272 | ||
10273 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10274 | { | |
10275 | case DW_SECT_INFO: | |
10276 | case DW_SECT_TYPES: | |
10277 | sections.info_or_types_offset = offset; | |
10278 | sections.info_or_types_size = size; | |
10279 | break; | |
10280 | case DW_SECT_ABBREV: | |
10281 | sections.abbrev_offset = offset; | |
10282 | sections.abbrev_size = size; | |
10283 | break; | |
10284 | case DW_SECT_LINE: | |
10285 | sections.line_offset = offset; | |
10286 | sections.line_size = size; | |
10287 | break; | |
10288 | case DW_SECT_LOC: | |
10289 | sections.loc_offset = offset; | |
10290 | sections.loc_size = size; | |
10291 | break; | |
10292 | case DW_SECT_STR_OFFSETS: | |
10293 | sections.str_offsets_offset = offset; | |
10294 | sections.str_offsets_size = size; | |
10295 | break; | |
10296 | case DW_SECT_MACINFO: | |
10297 | sections.macinfo_offset = offset; | |
10298 | sections.macinfo_size = size; | |
10299 | break; | |
10300 | case DW_SECT_MACRO: | |
10301 | sections.macro_offset = offset; | |
10302 | sections.macro_size = size; | |
10303 | break; | |
10304 | } | |
10305 | } | |
10306 | ||
10307 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10308 | have dwo_unit "live" in that. At least for now. | |
10309 | ||
10310 | The DWP file can be made up of a random collection of CUs and TUs. | |
10311 | However, for each CU + set of TUs that came from the same original DWO | |
10312 | file, we can combine them back into a virtual DWO file to save space | |
10313 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10314 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10315 | ||
10316 | virtual_dwo_name = | |
10317 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10318 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10319 | (long) (sections.line_size ? sections.line_offset : 0), | |
10320 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10321 | (long) (sections.str_offsets_size | |
10322 | ? sections.str_offsets_offset : 0)); | |
10323 | make_cleanup (xfree, virtual_dwo_name); | |
10324 | /* Can we use an existing virtual DWO file? */ | |
10325 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10326 | /* Create one if necessary. */ | |
10327 | if (*dwo_file_slot == NULL) | |
10328 | { | |
b4f54984 | 10329 | if (dwarf_read_debug) |
73869dc2 DE |
10330 | { |
10331 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10332 | virtual_dwo_name); | |
10333 | } | |
10334 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10335 | dwo_file->dwo_name |
10336 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10337 | virtual_dwo_name, | |
10338 | strlen (virtual_dwo_name)); | |
73869dc2 DE |
10339 | dwo_file->comp_dir = comp_dir; |
10340 | dwo_file->sections.abbrev = | |
10341 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10342 | sections.abbrev_offset, sections.abbrev_size); | |
10343 | dwo_file->sections.line = | |
10344 | create_dwp_v2_section (&dwp_file->sections.line, | |
10345 | sections.line_offset, sections.line_size); | |
10346 | dwo_file->sections.loc = | |
10347 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10348 | sections.loc_offset, sections.loc_size); | |
10349 | dwo_file->sections.macinfo = | |
10350 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10351 | sections.macinfo_offset, sections.macinfo_size); | |
10352 | dwo_file->sections.macro = | |
10353 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10354 | sections.macro_offset, sections.macro_size); | |
10355 | dwo_file->sections.str_offsets = | |
10356 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10357 | sections.str_offsets_offset, | |
10358 | sections.str_offsets_size); | |
10359 | /* The "str" section is global to the entire DWP file. */ | |
10360 | dwo_file->sections.str = dwp_file->sections.str; | |
10361 | /* The info or types section is assigned below to dwo_unit, | |
10362 | there's no need to record it in dwo_file. | |
10363 | Also, we can't simply record type sections in dwo_file because | |
10364 | we record a pointer into the vector in dwo_unit. As we collect more | |
10365 | types we'll grow the vector and eventually have to reallocate space | |
10366 | for it, invalidating all copies of pointers into the previous | |
10367 | contents. */ | |
10368 | *dwo_file_slot = dwo_file; | |
10369 | } | |
10370 | else | |
10371 | { | |
b4f54984 | 10372 | if (dwarf_read_debug) |
73869dc2 DE |
10373 | { |
10374 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10375 | virtual_dwo_name); | |
10376 | } | |
9a3c8263 | 10377 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 DE |
10378 | } |
10379 | do_cleanups (cleanups); | |
10380 | ||
10381 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10382 | dwo_unit->dwo_file = dwo_file; | |
10383 | dwo_unit->signature = signature; | |
8d749320 SM |
10384 | dwo_unit->section = |
10385 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
10386 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
10387 | ? &dwp_file->sections.types | |
10388 | : &dwp_file->sections.info, | |
10389 | sections.info_or_types_offset, | |
10390 | sections.info_or_types_size); | |
10391 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10392 | ||
10393 | return dwo_unit; | |
10394 | } | |
10395 | ||
57d63ce2 DE |
10396 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10397 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10398 | |
10399 | static struct dwo_unit * | |
57d63ce2 DE |
10400 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10401 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10402 | { |
57d63ce2 DE |
10403 | const struct dwp_hash_table *dwp_htab = |
10404 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10405 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10406 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10407 | uint32_t hash = signature & mask; |
10408 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10409 | unsigned int i; | |
10410 | void **slot; | |
870f88f7 | 10411 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
10412 | |
10413 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10414 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10415 | slot = htab_find_slot (is_debug_types |
10416 | ? dwp_file->loaded_tus | |
10417 | : dwp_file->loaded_cus, | |
10418 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10419 | |
10420 | if (*slot != NULL) | |
9a3c8263 | 10421 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10422 | |
10423 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10424 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10425 | { |
10426 | ULONGEST signature_in_table; | |
10427 | ||
10428 | signature_in_table = | |
57d63ce2 | 10429 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10430 | if (signature_in_table == signature) |
10431 | { | |
57d63ce2 DE |
10432 | uint32_t unit_index = |
10433 | read_4_bytes (dbfd, | |
10434 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10435 | |
73869dc2 DE |
10436 | if (dwp_file->version == 1) |
10437 | { | |
10438 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10439 | comp_dir, signature, | |
10440 | is_debug_types); | |
10441 | } | |
10442 | else | |
10443 | { | |
10444 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10445 | comp_dir, signature, | |
10446 | is_debug_types); | |
10447 | } | |
9a3c8263 | 10448 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10449 | } |
10450 | if (signature_in_table == 0) | |
10451 | return NULL; | |
10452 | hash = (hash + hash2) & mask; | |
10453 | } | |
10454 | ||
10455 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10456 | " [in module %s]"), | |
10457 | dwp_file->name); | |
10458 | } | |
10459 | ||
ab5088bf | 10460 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10461 | Open the file specified by FILE_NAME and hand it off to BFD for |
10462 | preliminary analysis. Return a newly initialized bfd *, which | |
10463 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10464 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10465 | SEARCH_CWD is true if the current directory is to be searched. |
10466 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10467 | If successful, the file is added to the bfd include table of the |
10468 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10469 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10470 | NOTE: This function is derived from symfile_bfd_open. */ |
10471 | ||
10472 | static bfd * | |
6ac97d4c | 10473 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
10474 | { |
10475 | bfd *sym_bfd; | |
80626a55 | 10476 | int desc, flags; |
3019eac3 | 10477 | char *absolute_name; |
9c02c129 DE |
10478 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10479 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10480 | to debug_file_directory. */ | |
10481 | char *search_path; | |
10482 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10483 | ||
6ac97d4c DE |
10484 | if (search_cwd) |
10485 | { | |
10486 | if (*debug_file_directory != '\0') | |
10487 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 10488 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
10489 | else |
10490 | search_path = xstrdup ("."); | |
10491 | } | |
9c02c129 | 10492 | else |
6ac97d4c | 10493 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10494 | |
492c0ab7 | 10495 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10496 | if (is_dwp) |
10497 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10498 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10499 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10500 | xfree (search_path); |
3019eac3 DE |
10501 | if (desc < 0) |
10502 | return NULL; | |
10503 | ||
bb397797 | 10504 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 10505 | xfree (absolute_name); |
9c02c129 DE |
10506 | if (sym_bfd == NULL) |
10507 | return NULL; | |
3019eac3 DE |
10508 | bfd_set_cacheable (sym_bfd, 1); |
10509 | ||
10510 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
10511 | { | |
cbb099e8 | 10512 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
10513 | return NULL; |
10514 | } | |
10515 | ||
13aaf454 DE |
10516 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10517 | This is important because things like demangled_names_hash lives in the | |
10518 | objfile's per_bfd space and may have references to things like symbol | |
10519 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
10520 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd); | |
10521 | ||
3019eac3 DE |
10522 | return sym_bfd; |
10523 | } | |
10524 | ||
ab5088bf | 10525 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10526 | COMP_DIR is the DW_AT_comp_dir attribute. |
10527 | The result is the bfd handle of the file. | |
10528 | If there is a problem finding or opening the file, return NULL. | |
10529 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10530 | same as symfile_bfd_open. */ | |
10531 | ||
10532 | static bfd * | |
ab5088bf | 10533 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
10534 | { |
10535 | bfd *abfd; | |
3019eac3 | 10536 | |
80626a55 | 10537 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10538 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10539 | |
10540 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10541 | ||
10542 | if (comp_dir != NULL) | |
10543 | { | |
b36cec19 PA |
10544 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
10545 | file_name, (char *) NULL); | |
3019eac3 DE |
10546 | |
10547 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10548 | search path, which seems useful. */ | |
6ac97d4c | 10549 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10550 | xfree (path_to_try); |
10551 | if (abfd != NULL) | |
10552 | return abfd; | |
10553 | } | |
10554 | ||
10555 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10556 | is a list of paths. */ | |
10557 | ||
10558 | if (*debug_file_directory == '\0') | |
10559 | return NULL; | |
10560 | ||
6ac97d4c | 10561 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10562 | } |
10563 | ||
80626a55 DE |
10564 | /* This function is mapped across the sections and remembers the offset and |
10565 | size of each of the DWO debugging sections we are interested in. */ | |
10566 | ||
10567 | static void | |
10568 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10569 | { | |
9a3c8263 | 10570 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
10571 | const struct dwop_section_names *names = &dwop_section_names; |
10572 | ||
10573 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10574 | { | |
049412e3 | 10575 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
10576 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10577 | } | |
10578 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10579 | { | |
049412e3 | 10580 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
10581 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10582 | } | |
10583 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10584 | { | |
049412e3 | 10585 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
10586 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10587 | } | |
10588 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10589 | { | |
049412e3 | 10590 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
10591 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10592 | } | |
10593 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10594 | { | |
049412e3 | 10595 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
10596 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10597 | } | |
10598 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10599 | { | |
049412e3 | 10600 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
10601 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10602 | } | |
10603 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10604 | { | |
049412e3 | 10605 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
10606 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10607 | } | |
10608 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10609 | { | |
049412e3 | 10610 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
10611 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10612 | } | |
10613 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10614 | { | |
10615 | struct dwarf2_section_info type_section; | |
10616 | ||
10617 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 10618 | type_section.s.section = sectp; |
80626a55 DE |
10619 | type_section.size = bfd_get_section_size (sectp); |
10620 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10621 | &type_section); | |
10622 | } | |
10623 | } | |
10624 | ||
ab5088bf | 10625 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10626 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10627 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10628 | |
10629 | static struct dwo_file * | |
0ac5b59e DE |
10630 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10631 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10632 | { |
10633 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10634 | struct dwo_file *dwo_file; |
10635 | bfd *dbfd; | |
3019eac3 DE |
10636 | struct cleanup *cleanups; |
10637 | ||
ab5088bf | 10638 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
10639 | if (dbfd == NULL) |
10640 | { | |
b4f54984 | 10641 | if (dwarf_read_debug) |
80626a55 DE |
10642 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
10643 | return NULL; | |
10644 | } | |
10645 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10646 | dwo_file->dwo_name = dwo_name; |
10647 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 10648 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
10649 | |
10650 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10651 | ||
80626a55 | 10652 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 10653 | |
19c3d4c9 | 10654 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
10655 | |
10656 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
10657 | dwo_file->sections.types); | |
10658 | ||
10659 | discard_cleanups (cleanups); | |
10660 | ||
b4f54984 | 10661 | if (dwarf_read_debug) |
80626a55 DE |
10662 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
10663 | ||
3019eac3 DE |
10664 | return dwo_file; |
10665 | } | |
10666 | ||
80626a55 | 10667 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10668 | size of each of the DWP debugging sections common to version 1 and 2 that |
10669 | we are interested in. */ | |
3019eac3 | 10670 | |
80626a55 | 10671 | static void |
73869dc2 DE |
10672 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10673 | void *dwp_file_ptr) | |
3019eac3 | 10674 | { |
9a3c8263 | 10675 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
10676 | const struct dwop_section_names *names = &dwop_section_names; |
10677 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10678 | |
80626a55 | 10679 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10680 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10681 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10682 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10683 | |
80626a55 DE |
10684 | /* Look for specific sections that we need. */ |
10685 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10686 | { | |
049412e3 | 10687 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
10688 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10689 | } | |
10690 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10691 | { | |
049412e3 | 10692 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
10693 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10694 | } | |
10695 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10696 | { | |
049412e3 | 10697 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
10698 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10699 | } | |
10700 | } | |
3019eac3 | 10701 | |
73869dc2 DE |
10702 | /* This function is mapped across the sections and remembers the offset and |
10703 | size of each of the DWP version 2 debugging sections that we are interested | |
10704 | in. This is split into a separate function because we don't know if we | |
10705 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10706 | ||
10707 | static void | |
10708 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10709 | { | |
9a3c8263 | 10710 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
10711 | const struct dwop_section_names *names = &dwop_section_names; |
10712 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10713 | ||
10714 | /* Record the ELF section number for later lookup: this is what the | |
10715 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10716 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10717 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10718 | ||
10719 | /* Look for specific sections that we need. */ | |
10720 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10721 | { | |
049412e3 | 10722 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
10723 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
10724 | } | |
10725 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10726 | { | |
049412e3 | 10727 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
10728 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
10729 | } | |
10730 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10731 | { | |
049412e3 | 10732 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
10733 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
10734 | } | |
10735 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10736 | { | |
049412e3 | 10737 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
10738 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
10739 | } | |
10740 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10741 | { | |
049412e3 | 10742 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
10743 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
10744 | } | |
10745 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10746 | { | |
049412e3 | 10747 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
10748 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
10749 | } | |
10750 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10751 | { | |
049412e3 | 10752 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
10753 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
10754 | } | |
10755 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10756 | { | |
049412e3 | 10757 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
10758 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
10759 | } | |
10760 | } | |
10761 | ||
80626a55 | 10762 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10763 | |
80626a55 DE |
10764 | static hashval_t |
10765 | hash_dwp_loaded_cutus (const void *item) | |
10766 | { | |
9a3c8263 | 10767 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 10768 | |
80626a55 DE |
10769 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
10770 | return dwo_unit->signature; | |
3019eac3 DE |
10771 | } |
10772 | ||
80626a55 | 10773 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10774 | |
80626a55 DE |
10775 | static int |
10776 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 10777 | { |
9a3c8263 SM |
10778 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
10779 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 10780 | |
80626a55 DE |
10781 | return dua->signature == dub->signature; |
10782 | } | |
3019eac3 | 10783 | |
80626a55 | 10784 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10785 | |
80626a55 DE |
10786 | static htab_t |
10787 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
10788 | { | |
10789 | return htab_create_alloc_ex (3, | |
10790 | hash_dwp_loaded_cutus, | |
10791 | eq_dwp_loaded_cutus, | |
10792 | NULL, | |
10793 | &objfile->objfile_obstack, | |
10794 | hashtab_obstack_allocate, | |
10795 | dummy_obstack_deallocate); | |
10796 | } | |
3019eac3 | 10797 | |
ab5088bf DE |
10798 | /* Try to open DWP file FILE_NAME. |
10799 | The result is the bfd handle of the file. | |
10800 | If there is a problem finding or opening the file, return NULL. | |
10801 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10802 | same as symfile_bfd_open. */ | |
10803 | ||
10804 | static bfd * | |
10805 | open_dwp_file (const char *file_name) | |
10806 | { | |
6ac97d4c DE |
10807 | bfd *abfd; |
10808 | ||
10809 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
10810 | if (abfd != NULL) | |
10811 | return abfd; | |
10812 | ||
10813 | /* Work around upstream bug 15652. | |
10814 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
10815 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
10816 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
10817 | of the executable's path may have discarded the needed info. | |
10818 | [IWBN if the dwp file name was recorded in the executable, akin to | |
10819 | .gnu_debuglink, but that doesn't exist yet.] | |
10820 | Strip the directory from FILE_NAME and search again. */ | |
10821 | if (*debug_file_directory != '\0') | |
10822 | { | |
10823 | /* Don't implicitly search the current directory here. | |
10824 | If the user wants to search "." to handle this case, | |
10825 | it must be added to debug-file-directory. */ | |
10826 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
10827 | 0 /*search_cwd*/); | |
10828 | } | |
10829 | ||
10830 | return NULL; | |
ab5088bf DE |
10831 | } |
10832 | ||
80626a55 DE |
10833 | /* Initialize the use of the DWP file for the current objfile. |
10834 | By convention the name of the DWP file is ${objfile}.dwp. | |
10835 | The result is NULL if it can't be found. */ | |
a766d390 | 10836 | |
80626a55 | 10837 | static struct dwp_file * |
ab5088bf | 10838 | open_and_init_dwp_file (void) |
80626a55 DE |
10839 | { |
10840 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10841 | struct dwp_file *dwp_file; | |
10842 | char *dwp_name; | |
10843 | bfd *dbfd; | |
6c447423 | 10844 | struct cleanup *cleanups = make_cleanup (null_cleanup, 0); |
80626a55 | 10845 | |
82bf32bc JK |
10846 | /* Try to find first .dwp for the binary file before any symbolic links |
10847 | resolving. */ | |
6c447423 DE |
10848 | |
10849 | /* If the objfile is a debug file, find the name of the real binary | |
10850 | file and get the name of dwp file from there. */ | |
10851 | if (objfile->separate_debug_objfile_backlink != NULL) | |
10852 | { | |
10853 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
10854 | const char *backlink_basename = lbasename (backlink->original_name); | |
10855 | char *debug_dirname = ldirname (objfile->original_name); | |
10856 | ||
10857 | make_cleanup (xfree, debug_dirname); | |
10858 | dwp_name = xstrprintf ("%s%s%s.dwp", debug_dirname, | |
10859 | SLASH_STRING, backlink_basename); | |
10860 | } | |
10861 | else | |
10862 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
10863 | make_cleanup (xfree, dwp_name); | |
80626a55 | 10864 | |
ab5088bf | 10865 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
10866 | if (dbfd == NULL |
10867 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
10868 | { | |
10869 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
10870 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
10871 | make_cleanup (xfree, dwp_name); | |
10872 | dbfd = open_dwp_file (dwp_name); | |
10873 | } | |
10874 | ||
80626a55 DE |
10875 | if (dbfd == NULL) |
10876 | { | |
b4f54984 | 10877 | if (dwarf_read_debug) |
80626a55 DE |
10878 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); |
10879 | do_cleanups (cleanups); | |
10880 | return NULL; | |
3019eac3 | 10881 | } |
80626a55 | 10882 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 10883 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
10884 | dwp_file->dbfd = dbfd; |
10885 | do_cleanups (cleanups); | |
c906108c | 10886 | |
80626a55 DE |
10887 | /* +1: section 0 is unused */ |
10888 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
10889 | dwp_file->elf_sections = | |
10890 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
10891 | dwp_file->num_sections, asection *); | |
10892 | ||
73869dc2 | 10893 | bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file); |
80626a55 DE |
10894 | |
10895 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
10896 | ||
10897 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
10898 | ||
73869dc2 DE |
10899 | /* The DWP file version is stored in the hash table. Oh well. */ |
10900 | if (dwp_file->cus->version != dwp_file->tus->version) | |
10901 | { | |
10902 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 10903 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 10904 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
10905 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
10906 | " TU version %s [in DWP file %s]"), | |
10907 | pulongest (dwp_file->cus->version), | |
10908 | pulongest (dwp_file->tus->version), dwp_name); | |
73869dc2 DE |
10909 | } |
10910 | dwp_file->version = dwp_file->cus->version; | |
10911 | ||
10912 | if (dwp_file->version == 2) | |
10913 | bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file); | |
10914 | ||
19ac8c2e DE |
10915 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
10916 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 10917 | |
b4f54984 | 10918 | if (dwarf_read_debug) |
80626a55 DE |
10919 | { |
10920 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
10921 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
10922 | " %s CUs, %s TUs\n", |
10923 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
10924 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
10925 | } |
10926 | ||
10927 | return dwp_file; | |
3019eac3 | 10928 | } |
c906108c | 10929 | |
ab5088bf DE |
10930 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
10931 | ||
10932 | static struct dwp_file * | |
10933 | get_dwp_file (void) | |
10934 | { | |
10935 | if (! dwarf2_per_objfile->dwp_checked) | |
10936 | { | |
10937 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
10938 | dwarf2_per_objfile->dwp_checked = 1; | |
10939 | } | |
10940 | return dwarf2_per_objfile->dwp_file; | |
10941 | } | |
10942 | ||
80626a55 DE |
10943 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
10944 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
10945 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 10946 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
10947 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
10948 | ||
10949 | This is called, for example, when wanting to read a variable with a | |
10950 | complex location. Therefore we don't want to do file i/o for every call. | |
10951 | Therefore we don't want to look for a DWO file on every call. | |
10952 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
10953 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
10954 | for a DWO file. | |
10955 | ||
1c658ad5 | 10956 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 10957 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 10958 | |
3019eac3 | 10959 | static struct dwo_unit * |
80626a55 DE |
10960 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
10961 | const char *dwo_name, const char *comp_dir, | |
10962 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
10963 | { |
10964 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10965 | const char *kind = is_debug_types ? "TU" : "CU"; |
10966 | void **dwo_file_slot; | |
3019eac3 | 10967 | struct dwo_file *dwo_file; |
80626a55 | 10968 | struct dwp_file *dwp_file; |
cb1df416 | 10969 | |
6a506a2d DE |
10970 | /* First see if there's a DWP file. |
10971 | If we have a DWP file but didn't find the DWO inside it, don't | |
10972 | look for the original DWO file. It makes gdb behave differently | |
10973 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 10974 | |
ab5088bf | 10975 | dwp_file = get_dwp_file (); |
80626a55 | 10976 | if (dwp_file != NULL) |
cf2c3c16 | 10977 | { |
80626a55 DE |
10978 | const struct dwp_hash_table *dwp_htab = |
10979 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10980 | ||
10981 | if (dwp_htab != NULL) | |
10982 | { | |
10983 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
10984 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
10985 | signature, is_debug_types); | |
80626a55 DE |
10986 | |
10987 | if (dwo_cutu != NULL) | |
10988 | { | |
b4f54984 | 10989 | if (dwarf_read_debug) |
80626a55 DE |
10990 | { |
10991 | fprintf_unfiltered (gdb_stdlog, | |
10992 | "Virtual DWO %s %s found: @%s\n", | |
10993 | kind, hex_string (signature), | |
10994 | host_address_to_string (dwo_cutu)); | |
10995 | } | |
10996 | return dwo_cutu; | |
10997 | } | |
10998 | } | |
10999 | } | |
6a506a2d | 11000 | else |
80626a55 | 11001 | { |
6a506a2d | 11002 | /* No DWP file, look for the DWO file. */ |
80626a55 | 11003 | |
6a506a2d DE |
11004 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11005 | if (*dwo_file_slot == NULL) | |
80626a55 | 11006 | { |
6a506a2d DE |
11007 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11008 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11009 | } |
6a506a2d | 11010 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11011 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11012 | |
6a506a2d | 11013 | if (dwo_file != NULL) |
19c3d4c9 | 11014 | { |
6a506a2d DE |
11015 | struct dwo_unit *dwo_cutu = NULL; |
11016 | ||
11017 | if (is_debug_types && dwo_file->tus) | |
11018 | { | |
11019 | struct dwo_unit find_dwo_cutu; | |
11020 | ||
11021 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11022 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11023 | dwo_cutu |
11024 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d DE |
11025 | } |
11026 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 11027 | { |
6a506a2d DE |
11028 | if (signature == dwo_file->cu->signature) |
11029 | dwo_cutu = dwo_file->cu; | |
11030 | } | |
11031 | ||
11032 | if (dwo_cutu != NULL) | |
11033 | { | |
b4f54984 | 11034 | if (dwarf_read_debug) |
6a506a2d DE |
11035 | { |
11036 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11037 | kind, dwo_name, hex_string (signature), | |
11038 | host_address_to_string (dwo_cutu)); | |
11039 | } | |
11040 | return dwo_cutu; | |
80626a55 DE |
11041 | } |
11042 | } | |
2e276125 | 11043 | } |
9cdd5dbd | 11044 | |
80626a55 DE |
11045 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11046 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11047 | correctly to find the file. */ | |
11048 | ||
b4f54984 | 11049 | if (dwarf_read_debug) |
80626a55 DE |
11050 | { |
11051 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11052 | kind, dwo_name, hex_string (signature)); | |
11053 | } | |
3019eac3 | 11054 | |
6656a72d DE |
11055 | /* This is a warning and not a complaint because it can be caused by |
11056 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11057 | { |
11058 | /* Print the name of the DWP file if we looked there, helps the user | |
11059 | better diagnose the problem. */ | |
11060 | char *dwp_text = NULL; | |
11061 | struct cleanup *cleanups; | |
11062 | ||
11063 | if (dwp_file != NULL) | |
11064 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
11065 | cleanups = make_cleanup (xfree, dwp_text); | |
11066 | ||
11067 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11068 | " [in module %s]"), | |
11069 | kind, dwo_name, hex_string (signature), | |
11070 | dwp_text != NULL ? dwp_text : "", | |
11071 | this_unit->is_debug_types ? "TU" : "CU", | |
11072 | this_unit->offset.sect_off, objfile_name (objfile)); | |
11073 | ||
11074 | do_cleanups (cleanups); | |
11075 | } | |
3019eac3 | 11076 | return NULL; |
5fb290d7 DJ |
11077 | } |
11078 | ||
80626a55 DE |
11079 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11080 | See lookup_dwo_cutu_unit for details. */ | |
11081 | ||
11082 | static struct dwo_unit * | |
11083 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11084 | const char *dwo_name, const char *comp_dir, | |
11085 | ULONGEST signature) | |
11086 | { | |
11087 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11088 | } | |
11089 | ||
11090 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11091 | See lookup_dwo_cutu_unit for details. */ | |
11092 | ||
11093 | static struct dwo_unit * | |
11094 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11095 | const char *dwo_name, const char *comp_dir) | |
11096 | { | |
11097 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11098 | } | |
11099 | ||
89e63ee4 DE |
11100 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11101 | ||
11102 | static int | |
11103 | queue_and_load_dwo_tu (void **slot, void *info) | |
11104 | { | |
11105 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11106 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11107 | ULONGEST signature = dwo_unit->signature; | |
11108 | struct signatured_type *sig_type = | |
11109 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11110 | ||
11111 | if (sig_type != NULL) | |
11112 | { | |
11113 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11114 | ||
11115 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11116 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11117 | while processing PER_CU. */ | |
11118 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11119 | load_full_type_unit (sig_cu); | |
11120 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11121 | } | |
11122 | ||
11123 | return 1; | |
11124 | } | |
11125 | ||
11126 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11127 | The DWO may have the only definition of the type, though it may not be | |
11128 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11129 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11130 | ||
11131 | static void | |
11132 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11133 | { | |
11134 | struct dwo_unit *dwo_unit; | |
11135 | struct dwo_file *dwo_file; | |
11136 | ||
11137 | gdb_assert (!per_cu->is_debug_types); | |
11138 | gdb_assert (get_dwp_file () == NULL); | |
11139 | gdb_assert (per_cu->cu != NULL); | |
11140 | ||
11141 | dwo_unit = per_cu->cu->dwo_unit; | |
11142 | gdb_assert (dwo_unit != NULL); | |
11143 | ||
11144 | dwo_file = dwo_unit->dwo_file; | |
11145 | if (dwo_file->tus != NULL) | |
11146 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
11147 | } | |
11148 | ||
3019eac3 DE |
11149 | /* Free all resources associated with DWO_FILE. |
11150 | Close the DWO file and munmap the sections. | |
11151 | All memory should be on the objfile obstack. */ | |
348e048f DE |
11152 | |
11153 | static void | |
3019eac3 | 11154 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 11155 | { |
348e048f | 11156 | |
5c6fa7ab | 11157 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 11158 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 11159 | |
3019eac3 DE |
11160 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
11161 | } | |
348e048f | 11162 | |
3019eac3 | 11163 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 11164 | |
3019eac3 DE |
11165 | static void |
11166 | free_dwo_file_cleanup (void *arg) | |
11167 | { | |
11168 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
11169 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 11170 | |
3019eac3 DE |
11171 | free_dwo_file (dwo_file, objfile); |
11172 | } | |
348e048f | 11173 | |
3019eac3 | 11174 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 11175 | |
3019eac3 DE |
11176 | static int |
11177 | free_dwo_file_from_slot (void **slot, void *info) | |
11178 | { | |
11179 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
11180 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 11181 | |
3019eac3 | 11182 | free_dwo_file (dwo_file, objfile); |
348e048f | 11183 | |
3019eac3 DE |
11184 | return 1; |
11185 | } | |
348e048f | 11186 | |
3019eac3 | 11187 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 11188 | |
3019eac3 DE |
11189 | static void |
11190 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
11191 | { | |
11192 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 11193 | } |
3019eac3 DE |
11194 | \f |
11195 | /* Read in various DIEs. */ | |
348e048f | 11196 | |
d389af10 JK |
11197 | /* qsort helper for inherit_abstract_dies. */ |
11198 | ||
11199 | static int | |
11200 | unsigned_int_compar (const void *ap, const void *bp) | |
11201 | { | |
11202 | unsigned int a = *(unsigned int *) ap; | |
11203 | unsigned int b = *(unsigned int *) bp; | |
11204 | ||
11205 | return (a > b) - (b > a); | |
11206 | } | |
11207 | ||
11208 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
11209 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11210 | already referenced by DW_AT_abstract_origin from the children of the | |
11211 | current DIE. */ | |
d389af10 JK |
11212 | |
11213 | static void | |
11214 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11215 | { | |
11216 | struct die_info *child_die; | |
11217 | unsigned die_children_count; | |
11218 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
11219 | sect_offset *offsets; |
11220 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
11221 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11222 | struct die_info *origin_die; | |
11223 | /* Iterator of the ORIGIN_DIE children. */ | |
11224 | struct die_info *origin_child_die; | |
11225 | struct cleanup *cleanups; | |
11226 | struct attribute *attr; | |
cd02d79d PA |
11227 | struct dwarf2_cu *origin_cu; |
11228 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11229 | |
11230 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11231 | if (!attr) | |
11232 | return; | |
11233 | ||
cd02d79d PA |
11234 | /* Note that following die references may follow to a die in a |
11235 | different cu. */ | |
11236 | ||
11237 | origin_cu = cu; | |
11238 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11239 | ||
11240 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11241 | symbols in. */ | |
11242 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11243 | origin_cu->list_in_scope = cu->list_in_scope; | |
11244 | ||
edb3359d DJ |
11245 | if (die->tag != origin_die->tag |
11246 | && !(die->tag == DW_TAG_inlined_subroutine | |
11247 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11248 | complaint (&symfile_complaints, |
11249 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 11250 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
11251 | |
11252 | child_die = die->child; | |
11253 | die_children_count = 0; | |
11254 | while (child_die && child_die->tag) | |
11255 | { | |
11256 | child_die = sibling_die (child_die); | |
11257 | die_children_count++; | |
11258 | } | |
8d749320 | 11259 | offsets = XNEWVEC (sect_offset, die_children_count); |
d389af10 JK |
11260 | cleanups = make_cleanup (xfree, offsets); |
11261 | ||
11262 | offsets_end = offsets; | |
3ea89b92 PMR |
11263 | for (child_die = die->child; |
11264 | child_die && child_die->tag; | |
11265 | child_die = sibling_die (child_die)) | |
11266 | { | |
11267 | struct die_info *child_origin_die; | |
11268 | struct dwarf2_cu *child_origin_cu; | |
11269 | ||
11270 | /* We are trying to process concrete instance entries: | |
11271 | DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but | |
11272 | it's not relevant to our analysis here. i.e. detecting DIEs that are | |
11273 | present in the abstract instance but not referenced in the concrete | |
11274 | one. */ | |
11275 | if (child_die->tag == DW_TAG_GNU_call_site) | |
11276 | continue; | |
11277 | ||
c38f313d DJ |
11278 | /* For each CHILD_DIE, find the corresponding child of |
11279 | ORIGIN_DIE. If there is more than one layer of | |
11280 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11281 | but GCC versions at least through 4.4 generate this (GCC PR | |
11282 | 40573). */ | |
3ea89b92 PMR |
11283 | child_origin_die = child_die; |
11284 | child_origin_cu = cu; | |
c38f313d DJ |
11285 | while (1) |
11286 | { | |
cd02d79d PA |
11287 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11288 | child_origin_cu); | |
c38f313d DJ |
11289 | if (attr == NULL) |
11290 | break; | |
cd02d79d PA |
11291 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11292 | &child_origin_cu); | |
c38f313d DJ |
11293 | } |
11294 | ||
d389af10 JK |
11295 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11296 | counterpart may exist. */ | |
c38f313d | 11297 | if (child_origin_die != child_die) |
d389af10 | 11298 | { |
edb3359d DJ |
11299 | if (child_die->tag != child_origin_die->tag |
11300 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11301 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11302 | complaint (&symfile_complaints, |
11303 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11304 | "different tags"), child_die->offset.sect_off, |
11305 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11306 | if (child_origin_die->parent != origin_die) |
11307 | complaint (&symfile_complaints, | |
11308 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11309 | "different parents"), child_die->offset.sect_off, |
11310 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11311 | else |
11312 | *offsets_end++ = child_origin_die->offset; | |
d389af10 | 11313 | } |
d389af10 JK |
11314 | } |
11315 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11316 | unsigned_int_compar); | |
11317 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 11318 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
11319 | complaint (&symfile_complaints, |
11320 | _("Multiple children of DIE 0x%x refer " | |
11321 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 11322 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
11323 | |
11324 | offsetp = offsets; | |
11325 | origin_child_die = origin_die->child; | |
11326 | while (origin_child_die && origin_child_die->tag) | |
11327 | { | |
11328 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
11329 | while (offsetp < offsets_end |
11330 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 11331 | offsetp++; |
b64f50a1 JK |
11332 | if (offsetp >= offsets_end |
11333 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 | 11334 | { |
adde2bff DE |
11335 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11336 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11337 | This can happen with mutually referenced abstract_origins. | |
11338 | PR 16581. */ | |
11339 | if (!origin_child_die->in_process) | |
11340 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11341 | } |
11342 | origin_child_die = sibling_die (origin_child_die); | |
11343 | } | |
cd02d79d | 11344 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11345 | |
11346 | do_cleanups (cleanups); | |
11347 | } | |
11348 | ||
c906108c | 11349 | static void |
e7c27a73 | 11350 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11351 | { |
e7c27a73 | 11352 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11353 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11354 | struct context_stack *newobj; |
c906108c SS |
11355 | CORE_ADDR lowpc; |
11356 | CORE_ADDR highpc; | |
11357 | struct die_info *child_die; | |
edb3359d | 11358 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11359 | const char *name; |
e142c38c | 11360 | CORE_ADDR baseaddr; |
801e3a5b | 11361 | struct block *block; |
edb3359d | 11362 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11363 | VEC (symbolp) *template_args = NULL; |
11364 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11365 | |
11366 | if (inlined_func) | |
11367 | { | |
11368 | /* If we do not have call site information, we can't show the | |
11369 | caller of this inlined function. That's too confusing, so | |
11370 | only use the scope for local variables. */ | |
11371 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11372 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11373 | if (call_line == NULL || call_file == NULL) | |
11374 | { | |
11375 | read_lexical_block_scope (die, cu); | |
11376 | return; | |
11377 | } | |
11378 | } | |
c906108c | 11379 | |
e142c38c DJ |
11380 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11381 | ||
94af9270 | 11382 | name = dwarf2_name (die, cu); |
c906108c | 11383 | |
e8d05480 JB |
11384 | /* Ignore functions with missing or empty names. These are actually |
11385 | illegal according to the DWARF standard. */ | |
11386 | if (name == NULL) | |
11387 | { | |
11388 | complaint (&symfile_complaints, | |
b64f50a1 JK |
11389 | _("missing name for subprogram DIE at %d"), |
11390 | die->offset.sect_off); | |
e8d05480 JB |
11391 | return; |
11392 | } | |
11393 | ||
11394 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 11395 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 11396 | <= PC_BOUNDS_INVALID) |
e8d05480 | 11397 | { |
ae4d0c03 PM |
11398 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11399 | if (!attr || !DW_UNSND (attr)) | |
11400 | complaint (&symfile_complaints, | |
3e43a32a MS |
11401 | _("cannot get low and high bounds " |
11402 | "for subprogram DIE at %d"), | |
b64f50a1 | 11403 | die->offset.sect_off); |
e8d05480 JB |
11404 | return; |
11405 | } | |
c906108c | 11406 | |
3e29f34a MR |
11407 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11408 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 11409 | |
34eaf542 TT |
11410 | /* If we have any template arguments, then we must allocate a |
11411 | different sort of symbol. */ | |
11412 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11413 | { | |
11414 | if (child_die->tag == DW_TAG_template_type_param | |
11415 | || child_die->tag == DW_TAG_template_value_param) | |
11416 | { | |
e623cf5d | 11417 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11418 | templ_func->base.is_cplus_template_function = 1; |
11419 | break; | |
11420 | } | |
11421 | } | |
11422 | ||
fe978cb0 PA |
11423 | newobj = push_context (0, lowpc); |
11424 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 11425 | (struct symbol *) templ_func); |
4c2df51b | 11426 | |
4cecd739 DJ |
11427 | /* If there is a location expression for DW_AT_frame_base, record |
11428 | it. */ | |
e142c38c | 11429 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11430 | if (attr) |
fe978cb0 | 11431 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 11432 | |
63e43d3a PMR |
11433 | /* If there is a location for the static link, record it. */ |
11434 | newobj->static_link = NULL; | |
11435 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
11436 | if (attr) | |
11437 | { | |
224c3ddb SM |
11438 | newobj->static_link |
11439 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
11440 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
11441 | } | |
11442 | ||
e142c38c | 11443 | cu->list_in_scope = &local_symbols; |
c906108c | 11444 | |
639d11d3 | 11445 | if (die->child != NULL) |
c906108c | 11446 | { |
639d11d3 | 11447 | child_die = die->child; |
c906108c SS |
11448 | while (child_die && child_die->tag) |
11449 | { | |
34eaf542 TT |
11450 | if (child_die->tag == DW_TAG_template_type_param |
11451 | || child_die->tag == DW_TAG_template_value_param) | |
11452 | { | |
11453 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11454 | ||
f1078f66 DJ |
11455 | if (arg != NULL) |
11456 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11457 | } |
11458 | else | |
11459 | process_die (child_die, cu); | |
c906108c SS |
11460 | child_die = sibling_die (child_die); |
11461 | } | |
11462 | } | |
11463 | ||
d389af10 JK |
11464 | inherit_abstract_dies (die, cu); |
11465 | ||
4a811a97 UW |
11466 | /* If we have a DW_AT_specification, we might need to import using |
11467 | directives from the context of the specification DIE. See the | |
11468 | comment in determine_prefix. */ | |
11469 | if (cu->language == language_cplus | |
11470 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11471 | { | |
11472 | struct dwarf2_cu *spec_cu = cu; | |
11473 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11474 | ||
11475 | while (spec_die) | |
11476 | { | |
11477 | child_die = spec_die->child; | |
11478 | while (child_die && child_die->tag) | |
11479 | { | |
11480 | if (child_die->tag == DW_TAG_imported_module) | |
11481 | process_die (child_die, spec_cu); | |
11482 | child_die = sibling_die (child_die); | |
11483 | } | |
11484 | ||
11485 | /* In some cases, GCC generates specification DIEs that | |
11486 | themselves contain DW_AT_specification attributes. */ | |
11487 | spec_die = die_specification (spec_die, &spec_cu); | |
11488 | } | |
11489 | } | |
11490 | ||
fe978cb0 | 11491 | newobj = pop_context (); |
c906108c | 11492 | /* Make a block for the local symbols within. */ |
fe978cb0 | 11493 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 11494 | newobj->static_link, lowpc, highpc); |
801e3a5b | 11495 | |
df8a16a1 | 11496 | /* For C++, set the block's scope. */ |
45280282 IB |
11497 | if ((cu->language == language_cplus |
11498 | || cu->language == language_fortran | |
c44af4eb TT |
11499 | || cu->language == language_d |
11500 | || cu->language == language_rust) | |
4d4ec4e5 | 11501 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11502 | block_set_scope (block, determine_prefix (die, cu), |
11503 | &objfile->objfile_obstack); | |
df8a16a1 | 11504 | |
801e3a5b JB |
11505 | /* If we have address ranges, record them. */ |
11506 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11507 | |
fe978cb0 | 11508 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 11509 | |
34eaf542 TT |
11510 | /* Attach template arguments to function. */ |
11511 | if (! VEC_empty (symbolp, template_args)) | |
11512 | { | |
11513 | gdb_assert (templ_func != NULL); | |
11514 | ||
11515 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11516 | templ_func->template_arguments | |
8d749320 SM |
11517 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
11518 | templ_func->n_template_arguments); | |
34eaf542 TT |
11519 | memcpy (templ_func->template_arguments, |
11520 | VEC_address (symbolp, template_args), | |
11521 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11522 | VEC_free (symbolp, template_args); | |
11523 | } | |
11524 | ||
208d8187 JB |
11525 | /* In C++, we can have functions nested inside functions (e.g., when |
11526 | a function declares a class that has methods). This means that | |
11527 | when we finish processing a function scope, we may need to go | |
11528 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 11529 | local_symbols = newobj->locals; |
22cee43f | 11530 | local_using_directives = newobj->local_using_directives; |
208d8187 | 11531 | |
921e78cf JB |
11532 | /* If we've finished processing a top-level function, subsequent |
11533 | symbols go in the file symbol list. */ | |
11534 | if (outermost_context_p ()) | |
e142c38c | 11535 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11536 | } |
11537 | ||
11538 | /* Process all the DIES contained within a lexical block scope. Start | |
11539 | a new scope, process the dies, and then close the scope. */ | |
11540 | ||
11541 | static void | |
e7c27a73 | 11542 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11543 | { |
e7c27a73 | 11544 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11545 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11546 | struct context_stack *newobj; |
c906108c SS |
11547 | CORE_ADDR lowpc, highpc; |
11548 | struct die_info *child_die; | |
e142c38c DJ |
11549 | CORE_ADDR baseaddr; |
11550 | ||
11551 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11552 | |
11553 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11554 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11555 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11556 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11557 | describe ranges. */ |
e385593e JK |
11558 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
11559 | { | |
11560 | case PC_BOUNDS_NOT_PRESENT: | |
11561 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
11562 | there was no wrapping by that DW_TAG_lexical_block. | |
11563 | GCC does no longer produces such DWARF since GCC r224161. */ | |
11564 | for (child_die = die->child; | |
11565 | child_die != NULL && child_die->tag; | |
11566 | child_die = sibling_die (child_die)) | |
11567 | process_die (child_die, cu); | |
11568 | return; | |
11569 | case PC_BOUNDS_INVALID: | |
11570 | return; | |
11571 | } | |
3e29f34a MR |
11572 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11573 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
11574 | |
11575 | push_context (0, lowpc); | |
639d11d3 | 11576 | if (die->child != NULL) |
c906108c | 11577 | { |
639d11d3 | 11578 | child_die = die->child; |
c906108c SS |
11579 | while (child_die && child_die->tag) |
11580 | { | |
e7c27a73 | 11581 | process_die (child_die, cu); |
c906108c SS |
11582 | child_die = sibling_die (child_die); |
11583 | } | |
11584 | } | |
3ea89b92 | 11585 | inherit_abstract_dies (die, cu); |
fe978cb0 | 11586 | newobj = pop_context (); |
c906108c | 11587 | |
22cee43f | 11588 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 11589 | { |
801e3a5b | 11590 | struct block *block |
63e43d3a | 11591 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 11592 | newobj->start_addr, highpc); |
801e3a5b JB |
11593 | |
11594 | /* Note that recording ranges after traversing children, as we | |
11595 | do here, means that recording a parent's ranges entails | |
11596 | walking across all its children's ranges as they appear in | |
11597 | the address map, which is quadratic behavior. | |
11598 | ||
11599 | It would be nicer to record the parent's ranges before | |
11600 | traversing its children, simply overriding whatever you find | |
11601 | there. But since we don't even decide whether to create a | |
11602 | block until after we've traversed its children, that's hard | |
11603 | to do. */ | |
11604 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 11605 | } |
fe978cb0 | 11606 | local_symbols = newobj->locals; |
22cee43f | 11607 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
11608 | } |
11609 | ||
96408a79 SA |
11610 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
11611 | ||
11612 | static void | |
11613 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11614 | { | |
11615 | struct objfile *objfile = cu->objfile; | |
11616 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11617 | CORE_ADDR pc, baseaddr; | |
11618 | struct attribute *attr; | |
11619 | struct call_site *call_site, call_site_local; | |
11620 | void **slot; | |
11621 | int nparams; | |
11622 | struct die_info *child_die; | |
11623 | ||
11624 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11625 | ||
11626 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11627 | if (!attr) | |
11628 | { | |
11629 | complaint (&symfile_complaints, | |
11630 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
11631 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11632 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11633 | return; |
11634 | } | |
31aa7e4e | 11635 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 11636 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
11637 | |
11638 | if (cu->call_site_htab == NULL) | |
11639 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11640 | NULL, &objfile->objfile_obstack, | |
11641 | hashtab_obstack_allocate, NULL); | |
11642 | call_site_local.pc = pc; | |
11643 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11644 | if (*slot != NULL) | |
11645 | { | |
11646 | complaint (&symfile_complaints, | |
11647 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
11648 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
11649 | paddress (gdbarch, pc), die->offset.sect_off, |
11650 | objfile_name (objfile)); | |
96408a79 SA |
11651 | return; |
11652 | } | |
11653 | ||
11654 | /* Count parameters at the caller. */ | |
11655 | ||
11656 | nparams = 0; | |
11657 | for (child_die = die->child; child_die && child_die->tag; | |
11658 | child_die = sibling_die (child_die)) | |
11659 | { | |
11660 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11661 | { | |
11662 | complaint (&symfile_complaints, | |
11663 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
11664 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
11665 | child_die->tag, child_die->offset.sect_off, |
11666 | objfile_name (objfile)); | |
96408a79 SA |
11667 | continue; |
11668 | } | |
11669 | ||
11670 | nparams++; | |
11671 | } | |
11672 | ||
224c3ddb SM |
11673 | call_site |
11674 | = ((struct call_site *) | |
11675 | obstack_alloc (&objfile->objfile_obstack, | |
11676 | sizeof (*call_site) | |
11677 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
11678 | *slot = call_site; |
11679 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11680 | call_site->pc = pc; | |
11681 | ||
11682 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
11683 | { | |
11684 | struct die_info *func_die; | |
11685 | ||
11686 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11687 | for (func_die = die->parent; | |
11688 | func_die && func_die->tag != DW_TAG_subprogram | |
11689 | && func_die->tag != DW_TAG_subroutine_type; | |
11690 | func_die = func_die->parent); | |
11691 | ||
11692 | /* DW_AT_GNU_all_call_sites is a superset | |
11693 | of DW_AT_GNU_all_tail_call_sites. */ | |
11694 | if (func_die | |
11695 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
11696 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
11697 | { | |
11698 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11699 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11700 | both the initial caller containing the real return address PC and | |
11701 | the final callee containing the current PC of a chain of tail | |
11702 | calls do not need to have the tail call list complete. But any | |
11703 | function candidate for a virtual tail call frame searched via | |
11704 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11705 | determined unambiguously. */ | |
11706 | } | |
11707 | else | |
11708 | { | |
11709 | struct type *func_type = NULL; | |
11710 | ||
11711 | if (func_die) | |
11712 | func_type = get_die_type (func_die, cu); | |
11713 | if (func_type != NULL) | |
11714 | { | |
11715 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11716 | ||
11717 | /* Enlist this call site to the function. */ | |
11718 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11719 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11720 | } | |
11721 | else | |
11722 | complaint (&symfile_complaints, | |
11723 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
11724 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11725 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11726 | } |
11727 | } | |
11728 | ||
11729 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11730 | if (attr == NULL) | |
11731 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11732 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
11733 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
11734 | /* Keep NULL DWARF_BLOCK. */; | |
11735 | else if (attr_form_is_block (attr)) | |
11736 | { | |
11737 | struct dwarf2_locexpr_baton *dlbaton; | |
11738 | ||
8d749320 | 11739 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
11740 | dlbaton->data = DW_BLOCK (attr)->data; |
11741 | dlbaton->size = DW_BLOCK (attr)->size; | |
11742 | dlbaton->per_cu = cu->per_cu; | |
11743 | ||
11744 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
11745 | } | |
7771576e | 11746 | else if (attr_form_is_ref (attr)) |
96408a79 | 11747 | { |
96408a79 SA |
11748 | struct dwarf2_cu *target_cu = cu; |
11749 | struct die_info *target_die; | |
11750 | ||
ac9ec31b | 11751 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
11752 | gdb_assert (target_cu->objfile == objfile); |
11753 | if (die_is_declaration (target_die, target_cu)) | |
11754 | { | |
7d45c7c3 | 11755 | const char *target_physname; |
9112db09 JK |
11756 | |
11757 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
7d45c7c3 KB |
11758 | target_physname = dwarf2_string_attr (target_die, |
11759 | DW_AT_linkage_name, | |
11760 | target_cu); | |
11761 | if (target_physname == NULL) | |
11762 | target_physname = dwarf2_string_attr (target_die, | |
11763 | DW_AT_MIPS_linkage_name, | |
11764 | target_cu); | |
11765 | if (target_physname == NULL) | |
9112db09 | 11766 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
11767 | if (target_physname == NULL) |
11768 | complaint (&symfile_complaints, | |
11769 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11770 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11771 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11772 | else |
7d455152 | 11773 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
11774 | } |
11775 | else | |
11776 | { | |
11777 | CORE_ADDR lowpc; | |
11778 | ||
11779 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 11780 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 11781 | <= PC_BOUNDS_INVALID) |
96408a79 SA |
11782 | complaint (&symfile_complaints, |
11783 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11784 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11785 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11786 | else |
3e29f34a MR |
11787 | { |
11788 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
11789 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
11790 | } | |
96408a79 SA |
11791 | } |
11792 | } | |
11793 | else | |
11794 | complaint (&symfile_complaints, | |
11795 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
11796 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 11797 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11798 | |
11799 | call_site->per_cu = cu->per_cu; | |
11800 | ||
11801 | for (child_die = die->child; | |
11802 | child_die && child_die->tag; | |
11803 | child_die = sibling_die (child_die)) | |
11804 | { | |
96408a79 | 11805 | struct call_site_parameter *parameter; |
1788b2d3 | 11806 | struct attribute *loc, *origin; |
96408a79 SA |
11807 | |
11808 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11809 | { | |
11810 | /* Already printed the complaint above. */ | |
11811 | continue; | |
11812 | } | |
11813 | ||
11814 | gdb_assert (call_site->parameter_count < nparams); | |
11815 | parameter = &call_site->parameter[call_site->parameter_count]; | |
11816 | ||
1788b2d3 JK |
11817 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
11818 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
11819 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 11820 | |
24c5c679 | 11821 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 11822 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 11823 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
11824 | { |
11825 | sect_offset offset; | |
11826 | ||
11827 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
11828 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
11829 | if (!offset_in_cu_p (&cu->header, offset)) |
11830 | { | |
11831 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
11832 | binding can be done only inside one CU. Such referenced DIE | |
11833 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
11834 | complaint (&symfile_complaints, | |
11835 | _("DW_AT_abstract_origin offset is not in CU for " | |
11836 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11837 | "[in module %s]"), | |
4262abfb | 11838 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
11839 | continue; |
11840 | } | |
1788b2d3 JK |
11841 | parameter->u.param_offset.cu_off = (offset.sect_off |
11842 | - cu->header.offset.sect_off); | |
11843 | } | |
11844 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
11845 | { |
11846 | complaint (&symfile_complaints, | |
11847 | _("No DW_FORM_block* DW_AT_location for " | |
11848 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11849 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11850 | continue; |
11851 | } | |
24c5c679 | 11852 | else |
96408a79 | 11853 | { |
24c5c679 JK |
11854 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
11855 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
11856 | if (parameter->u.dwarf_reg != -1) | |
11857 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
11858 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
11859 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
11860 | ¶meter->u.fb_offset)) | |
11861 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
11862 | else | |
11863 | { | |
11864 | complaint (&symfile_complaints, | |
11865 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
11866 | "for DW_FORM_block* DW_AT_location is supported for " | |
11867 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11868 | "[in module %s]"), | |
4262abfb | 11869 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
11870 | continue; |
11871 | } | |
96408a79 SA |
11872 | } |
11873 | ||
11874 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
11875 | if (!attr_form_is_block (attr)) | |
11876 | { | |
11877 | complaint (&symfile_complaints, | |
11878 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
11879 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11880 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11881 | continue; |
11882 | } | |
11883 | parameter->value = DW_BLOCK (attr)->data; | |
11884 | parameter->value_size = DW_BLOCK (attr)->size; | |
11885 | ||
11886 | /* Parameters are not pre-cleared by memset above. */ | |
11887 | parameter->data_value = NULL; | |
11888 | parameter->data_value_size = 0; | |
11889 | call_site->parameter_count++; | |
11890 | ||
11891 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
11892 | if (attr) | |
11893 | { | |
11894 | if (!attr_form_is_block (attr)) | |
11895 | complaint (&symfile_complaints, | |
11896 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
11897 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11898 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11899 | else |
11900 | { | |
11901 | parameter->data_value = DW_BLOCK (attr)->data; | |
11902 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
11903 | } | |
11904 | } | |
11905 | } | |
11906 | } | |
11907 | ||
43039443 | 11908 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
11909 | Return 1 if the attributes are present and valid, otherwise, return 0. |
11910 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
11911 | |
11912 | static int | |
11913 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
11914 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
11915 | struct partial_symtab *ranges_pst) | |
43039443 JK |
11916 | { |
11917 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 11918 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
11919 | struct comp_unit_head *cu_header = &cu->header; |
11920 | bfd *obfd = objfile->obfd; | |
11921 | unsigned int addr_size = cu_header->addr_size; | |
11922 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11923 | /* Base address selection entry. */ | |
11924 | CORE_ADDR base; | |
11925 | int found_base; | |
11926 | unsigned int dummy; | |
d521ce57 | 11927 | const gdb_byte *buffer; |
43039443 JK |
11928 | int low_set; |
11929 | CORE_ADDR low = 0; | |
11930 | CORE_ADDR high = 0; | |
ff013f42 | 11931 | CORE_ADDR baseaddr; |
43039443 | 11932 | |
d00adf39 DE |
11933 | found_base = cu->base_known; |
11934 | base = cu->base_address; | |
43039443 | 11935 | |
be391dca | 11936 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11937 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
11938 | { |
11939 | complaint (&symfile_complaints, | |
11940 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
11941 | offset); | |
11942 | return 0; | |
11943 | } | |
dce234bc | 11944 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 11945 | |
43039443 JK |
11946 | low_set = 0; |
11947 | ||
e7030f15 | 11948 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 11949 | |
43039443 JK |
11950 | while (1) |
11951 | { | |
11952 | CORE_ADDR range_beginning, range_end; | |
11953 | ||
11954 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
11955 | buffer += addr_size; | |
11956 | range_end = read_address (obfd, buffer, cu, &dummy); | |
11957 | buffer += addr_size; | |
11958 | offset += 2 * addr_size; | |
11959 | ||
11960 | /* An end of list marker is a pair of zero addresses. */ | |
11961 | if (range_beginning == 0 && range_end == 0) | |
11962 | /* Found the end of list entry. */ | |
11963 | break; | |
11964 | ||
11965 | /* Each base address selection entry is a pair of 2 values. | |
11966 | The first is the largest possible address, the second is | |
11967 | the base address. Check for a base address here. */ | |
11968 | if ((range_beginning & mask) == mask) | |
11969 | { | |
28d2bfb9 AB |
11970 | /* If we found the largest possible address, then we already |
11971 | have the base address in range_end. */ | |
11972 | base = range_end; | |
43039443 JK |
11973 | found_base = 1; |
11974 | continue; | |
11975 | } | |
11976 | ||
11977 | if (!found_base) | |
11978 | { | |
11979 | /* We have no valid base address for the ranges | |
11980 | data. */ | |
11981 | complaint (&symfile_complaints, | |
11982 | _("Invalid .debug_ranges data (no base address)")); | |
11983 | return 0; | |
11984 | } | |
11985 | ||
9277c30c UW |
11986 | if (range_beginning > range_end) |
11987 | { | |
11988 | /* Inverted range entries are invalid. */ | |
11989 | complaint (&symfile_complaints, | |
11990 | _("Invalid .debug_ranges data (inverted range)")); | |
11991 | return 0; | |
11992 | } | |
11993 | ||
11994 | /* Empty range entries have no effect. */ | |
11995 | if (range_beginning == range_end) | |
11996 | continue; | |
11997 | ||
43039443 JK |
11998 | range_beginning += base; |
11999 | range_end += base; | |
12000 | ||
01093045 DE |
12001 | /* A not-uncommon case of bad debug info. |
12002 | Don't pollute the addrmap with bad data. */ | |
12003 | if (range_beginning + baseaddr == 0 | |
12004 | && !dwarf2_per_objfile->has_section_at_zero) | |
12005 | { | |
12006 | complaint (&symfile_complaints, | |
12007 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12008 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12009 | continue; |
12010 | } | |
12011 | ||
9277c30c | 12012 | if (ranges_pst != NULL) |
3e29f34a MR |
12013 | { |
12014 | CORE_ADDR lowpc; | |
12015 | CORE_ADDR highpc; | |
12016 | ||
12017 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12018 | range_beginning + baseaddr); | |
12019 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12020 | range_end + baseaddr); | |
12021 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
12022 | ranges_pst); | |
12023 | } | |
ff013f42 | 12024 | |
43039443 JK |
12025 | /* FIXME: This is recording everything as a low-high |
12026 | segment of consecutive addresses. We should have a | |
12027 | data structure for discontiguous block ranges | |
12028 | instead. */ | |
12029 | if (! low_set) | |
12030 | { | |
12031 | low = range_beginning; | |
12032 | high = range_end; | |
12033 | low_set = 1; | |
12034 | } | |
12035 | else | |
12036 | { | |
12037 | if (range_beginning < low) | |
12038 | low = range_beginning; | |
12039 | if (range_end > high) | |
12040 | high = range_end; | |
12041 | } | |
12042 | } | |
12043 | ||
12044 | if (! low_set) | |
12045 | /* If the first entry is an end-of-list marker, the range | |
12046 | describes an empty scope, i.e. no instructions. */ | |
12047 | return 0; | |
12048 | ||
12049 | if (low_return) | |
12050 | *low_return = low; | |
12051 | if (high_return) | |
12052 | *high_return = high; | |
12053 | return 1; | |
12054 | } | |
12055 | ||
3a2b436a JK |
12056 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
12057 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 12058 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 12059 | |
3a2b436a | 12060 | static enum pc_bounds_kind |
af34e669 | 12061 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
12062 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
12063 | struct partial_symtab *pst) | |
c906108c SS |
12064 | { |
12065 | struct attribute *attr; | |
91da1414 | 12066 | struct attribute *attr_high; |
af34e669 DJ |
12067 | CORE_ADDR low = 0; |
12068 | CORE_ADDR high = 0; | |
e385593e | 12069 | enum pc_bounds_kind ret; |
c906108c | 12070 | |
91da1414 MW |
12071 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12072 | if (attr_high) | |
af34e669 | 12073 | { |
e142c38c | 12074 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 12075 | if (attr) |
91da1414 | 12076 | { |
31aa7e4e JB |
12077 | low = attr_value_as_address (attr); |
12078 | high = attr_value_as_address (attr_high); | |
12079 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12080 | high += low; | |
91da1414 | 12081 | } |
af34e669 DJ |
12082 | else |
12083 | /* Found high w/o low attribute. */ | |
e385593e | 12084 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
12085 | |
12086 | /* Found consecutive range of addresses. */ | |
3a2b436a | 12087 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 12088 | } |
c906108c | 12089 | else |
af34e669 | 12090 | { |
e142c38c | 12091 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
12092 | if (attr != NULL) |
12093 | { | |
ab435259 DE |
12094 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12095 | We take advantage of the fact that DW_AT_ranges does not appear | |
12096 | in DW_TAG_compile_unit of DWO files. */ | |
12097 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
12098 | unsigned int ranges_offset = (DW_UNSND (attr) | |
12099 | + (need_ranges_base | |
12100 | ? cu->ranges_base | |
12101 | : 0)); | |
2e3cf129 | 12102 | |
af34e669 | 12103 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 12104 | .debug_ranges section. */ |
2e3cf129 | 12105 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 12106 | return PC_BOUNDS_INVALID; |
43039443 | 12107 | /* Found discontinuous range of addresses. */ |
3a2b436a | 12108 | ret = PC_BOUNDS_RANGES; |
af34e669 | 12109 | } |
e385593e JK |
12110 | else |
12111 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 12112 | } |
c906108c | 12113 | |
9373cf26 JK |
12114 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
12115 | if (high <= low) | |
e385593e | 12116 | return PC_BOUNDS_INVALID; |
c906108c SS |
12117 | |
12118 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
12119 | eliminate duplicate copies of functions and vtables and such. | |
12120 | The linker will arbitrarily choose one and discard the others. | |
12121 | The AT_*_pc values for such functions refer to local labels in | |
12122 | these sections. If the section from that file was discarded, the | |
12123 | labels are not in the output, so the relocs get a value of 0. | |
12124 | If this is a discarded function, mark the pc bounds as invalid, | |
12125 | so that GDB will ignore it. */ | |
72dca2f5 | 12126 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 12127 | return PC_BOUNDS_INVALID; |
c906108c SS |
12128 | |
12129 | *lowpc = low; | |
96408a79 SA |
12130 | if (highpc) |
12131 | *highpc = high; | |
af34e669 | 12132 | return ret; |
c906108c SS |
12133 | } |
12134 | ||
b084d499 JB |
12135 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
12136 | its low and high PC addresses. Do nothing if these addresses could not | |
12137 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
12138 | and HIGHPC to the high address if greater than HIGHPC. */ | |
12139 | ||
12140 | static void | |
12141 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
12142 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12143 | struct dwarf2_cu *cu) | |
12144 | { | |
12145 | CORE_ADDR low, high; | |
12146 | struct die_info *child = die->child; | |
12147 | ||
e385593e | 12148 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 JB |
12149 | { |
12150 | *lowpc = min (*lowpc, low); | |
12151 | *highpc = max (*highpc, high); | |
12152 | } | |
12153 | ||
12154 | /* If the language does not allow nested subprograms (either inside | |
12155 | subprograms or lexical blocks), we're done. */ | |
12156 | if (cu->language != language_ada) | |
12157 | return; | |
6e70227d | 12158 | |
b084d499 JB |
12159 | /* Check all the children of the given DIE. If it contains nested |
12160 | subprograms, then check their pc bounds. Likewise, we need to | |
12161 | check lexical blocks as well, as they may also contain subprogram | |
12162 | definitions. */ | |
12163 | while (child && child->tag) | |
12164 | { | |
12165 | if (child->tag == DW_TAG_subprogram | |
12166 | || child->tag == DW_TAG_lexical_block) | |
12167 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
12168 | child = sibling_die (child); | |
12169 | } | |
12170 | } | |
12171 | ||
fae299cd DC |
12172 | /* Get the low and high pc's represented by the scope DIE, and store |
12173 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
12174 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
12175 | ||
12176 | static void | |
12177 | get_scope_pc_bounds (struct die_info *die, | |
12178 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12179 | struct dwarf2_cu *cu) | |
12180 | { | |
12181 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
12182 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
12183 | CORE_ADDR current_low, current_high; | |
12184 | ||
3a2b436a | 12185 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 12186 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
12187 | { |
12188 | best_low = current_low; | |
12189 | best_high = current_high; | |
12190 | } | |
12191 | else | |
12192 | { | |
12193 | struct die_info *child = die->child; | |
12194 | ||
12195 | while (child && child->tag) | |
12196 | { | |
12197 | switch (child->tag) { | |
12198 | case DW_TAG_subprogram: | |
b084d499 | 12199 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
12200 | break; |
12201 | case DW_TAG_namespace: | |
f55ee35c | 12202 | case DW_TAG_module: |
fae299cd DC |
12203 | /* FIXME: carlton/2004-01-16: Should we do this for |
12204 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
12205 | that current GCC's always emit the DIEs corresponding | |
12206 | to definitions of methods of classes as children of a | |
12207 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
12208 | the DIEs giving the declarations, which could be | |
12209 | anywhere). But I don't see any reason why the | |
12210 | standards says that they have to be there. */ | |
12211 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
12212 | ||
12213 | if (current_low != ((CORE_ADDR) -1)) | |
12214 | { | |
12215 | best_low = min (best_low, current_low); | |
12216 | best_high = max (best_high, current_high); | |
12217 | } | |
12218 | break; | |
12219 | default: | |
0963b4bd | 12220 | /* Ignore. */ |
fae299cd DC |
12221 | break; |
12222 | } | |
12223 | ||
12224 | child = sibling_die (child); | |
12225 | } | |
12226 | } | |
12227 | ||
12228 | *lowpc = best_low; | |
12229 | *highpc = best_high; | |
12230 | } | |
12231 | ||
801e3a5b JB |
12232 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
12233 | in DIE. */ | |
380bca97 | 12234 | |
801e3a5b JB |
12235 | static void |
12236 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
12237 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
12238 | { | |
bb5ed363 | 12239 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12240 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 12241 | struct attribute *attr; |
91da1414 | 12242 | struct attribute *attr_high; |
801e3a5b | 12243 | |
91da1414 MW |
12244 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12245 | if (attr_high) | |
801e3a5b | 12246 | { |
801e3a5b JB |
12247 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
12248 | if (attr) | |
12249 | { | |
31aa7e4e JB |
12250 | CORE_ADDR low = attr_value_as_address (attr); |
12251 | CORE_ADDR high = attr_value_as_address (attr_high); | |
12252 | ||
12253 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12254 | high += low; | |
9a619af0 | 12255 | |
3e29f34a MR |
12256 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
12257 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
12258 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
12259 | } |
12260 | } | |
12261 | ||
12262 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12263 | if (attr) | |
12264 | { | |
bb5ed363 | 12265 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12266 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12267 | We take advantage of the fact that DW_AT_ranges does not appear | |
12268 | in DW_TAG_compile_unit of DWO files. */ | |
12269 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12270 | |
12271 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12272 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12273 | unsigned long offset = (DW_UNSND (attr) |
12274 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12275 | const gdb_byte *buffer; |
801e3a5b JB |
12276 | |
12277 | /* For some target architectures, but not others, the | |
12278 | read_address function sign-extends the addresses it returns. | |
12279 | To recognize base address selection entries, we need a | |
12280 | mask. */ | |
12281 | unsigned int addr_size = cu->header.addr_size; | |
12282 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12283 | ||
12284 | /* The base address, to which the next pair is relative. Note | |
12285 | that this 'base' is a DWARF concept: most entries in a range | |
12286 | list are relative, to reduce the number of relocs against the | |
12287 | debugging information. This is separate from this function's | |
12288 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12289 | information from a shared library based on the address at | |
12290 | which the library was loaded. */ | |
d00adf39 DE |
12291 | CORE_ADDR base = cu->base_address; |
12292 | int base_known = cu->base_known; | |
801e3a5b | 12293 | |
d62bfeaf | 12294 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12295 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
12296 | { |
12297 | complaint (&symfile_complaints, | |
12298 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
12299 | offset); | |
12300 | return; | |
12301 | } | |
d62bfeaf | 12302 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
12303 | |
12304 | for (;;) | |
12305 | { | |
12306 | unsigned int bytes_read; | |
12307 | CORE_ADDR start, end; | |
12308 | ||
12309 | start = read_address (obfd, buffer, cu, &bytes_read); | |
12310 | buffer += bytes_read; | |
12311 | end = read_address (obfd, buffer, cu, &bytes_read); | |
12312 | buffer += bytes_read; | |
12313 | ||
12314 | /* Did we find the end of the range list? */ | |
12315 | if (start == 0 && end == 0) | |
12316 | break; | |
12317 | ||
12318 | /* Did we find a base address selection entry? */ | |
12319 | else if ((start & base_select_mask) == base_select_mask) | |
12320 | { | |
12321 | base = end; | |
12322 | base_known = 1; | |
12323 | } | |
12324 | ||
12325 | /* We found an ordinary address range. */ | |
12326 | else | |
12327 | { | |
12328 | if (!base_known) | |
12329 | { | |
12330 | complaint (&symfile_complaints, | |
3e43a32a MS |
12331 | _("Invalid .debug_ranges data " |
12332 | "(no base address)")); | |
801e3a5b JB |
12333 | return; |
12334 | } | |
12335 | ||
9277c30c UW |
12336 | if (start > end) |
12337 | { | |
12338 | /* Inverted range entries are invalid. */ | |
12339 | complaint (&symfile_complaints, | |
12340 | _("Invalid .debug_ranges data " | |
12341 | "(inverted range)")); | |
12342 | return; | |
12343 | } | |
12344 | ||
12345 | /* Empty range entries have no effect. */ | |
12346 | if (start == end) | |
12347 | continue; | |
12348 | ||
01093045 DE |
12349 | start += base + baseaddr; |
12350 | end += base + baseaddr; | |
12351 | ||
12352 | /* A not-uncommon case of bad debug info. | |
12353 | Don't pollute the addrmap with bad data. */ | |
12354 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
12355 | { | |
12356 | complaint (&symfile_complaints, | |
12357 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12358 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12359 | continue; |
12360 | } | |
12361 | ||
3e29f34a MR |
12362 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
12363 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
01093045 | 12364 | record_block_range (block, start, end - 1); |
801e3a5b JB |
12365 | } |
12366 | } | |
12367 | } | |
12368 | } | |
12369 | ||
685b1105 JK |
12370 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12371 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12372 | |
685b1105 JK |
12373 | static void |
12374 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 12375 | { |
38360086 | 12376 | int major, minor; |
60d5a603 JK |
12377 | |
12378 | if (cu->producer == NULL) | |
12379 | { | |
12380 | /* For unknown compilers expect their behavior is DWARF version | |
12381 | compliant. | |
12382 | ||
12383 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12384 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12385 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12386 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12387 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12388 | } |
b1ffba5a | 12389 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 12390 | { |
38360086 MW |
12391 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
12392 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 12393 | } |
61012eef | 12394 | else if (startswith (cu->producer, "Intel(R) C")) |
685b1105 JK |
12395 | cu->producer_is_icc = 1; |
12396 | else | |
12397 | { | |
12398 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12399 | compliant. */ | |
60d5a603 JK |
12400 | } |
12401 | ||
ba919b58 | 12402 | cu->checked_producer = 1; |
685b1105 | 12403 | } |
ba919b58 | 12404 | |
685b1105 JK |
12405 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12406 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12407 | during 4.6.0 experimental. */ | |
12408 | ||
12409 | static int | |
12410 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12411 | { | |
12412 | if (!cu->checked_producer) | |
12413 | check_producer (cu); | |
12414 | ||
12415 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12416 | } |
12417 | ||
12418 | /* Return the default accessibility type if it is not overriden by | |
12419 | DW_AT_accessibility. */ | |
12420 | ||
12421 | static enum dwarf_access_attribute | |
12422 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12423 | { | |
12424 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12425 | { | |
12426 | /* The default DWARF 2 accessibility for members is public, the default | |
12427 | accessibility for inheritance is private. */ | |
12428 | ||
12429 | if (die->tag != DW_TAG_inheritance) | |
12430 | return DW_ACCESS_public; | |
12431 | else | |
12432 | return DW_ACCESS_private; | |
12433 | } | |
12434 | else | |
12435 | { | |
12436 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12437 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12438 | depends on the container kind. */ | |
12439 | ||
12440 | if (die->parent->tag == DW_TAG_class_type) | |
12441 | return DW_ACCESS_private; | |
12442 | else | |
12443 | return DW_ACCESS_public; | |
12444 | } | |
12445 | } | |
12446 | ||
74ac6d43 TT |
12447 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12448 | offset. If the attribute was not found return 0, otherwise return | |
12449 | 1. If it was found but could not properly be handled, set *OFFSET | |
12450 | to 0. */ | |
12451 | ||
12452 | static int | |
12453 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12454 | LONGEST *offset) | |
12455 | { | |
12456 | struct attribute *attr; | |
12457 | ||
12458 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12459 | if (attr != NULL) | |
12460 | { | |
12461 | *offset = 0; | |
12462 | ||
12463 | /* Note that we do not check for a section offset first here. | |
12464 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12465 | so if we see it, we can assume that a constant form is really | |
12466 | a constant and not a section offset. */ | |
12467 | if (attr_form_is_constant (attr)) | |
12468 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12469 | else if (attr_form_is_section_offset (attr)) | |
12470 | dwarf2_complex_location_expr_complaint (); | |
12471 | else if (attr_form_is_block (attr)) | |
12472 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12473 | else | |
12474 | dwarf2_complex_location_expr_complaint (); | |
12475 | ||
12476 | return 1; | |
12477 | } | |
12478 | ||
12479 | return 0; | |
12480 | } | |
12481 | ||
c906108c SS |
12482 | /* Add an aggregate field to the field list. */ |
12483 | ||
12484 | static void | |
107d2387 | 12485 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12486 | struct dwarf2_cu *cu) |
6e70227d | 12487 | { |
e7c27a73 | 12488 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12489 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12490 | struct nextfield *new_field; |
12491 | struct attribute *attr; | |
12492 | struct field *fp; | |
15d034d0 | 12493 | const char *fieldname = ""; |
c906108c SS |
12494 | |
12495 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12496 | new_field = XNEW (struct nextfield); |
b8c9b27d | 12497 | make_cleanup (xfree, new_field); |
c906108c | 12498 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12499 | |
12500 | if (die->tag == DW_TAG_inheritance) | |
12501 | { | |
12502 | new_field->next = fip->baseclasses; | |
12503 | fip->baseclasses = new_field; | |
12504 | } | |
12505 | else | |
12506 | { | |
12507 | new_field->next = fip->fields; | |
12508 | fip->fields = new_field; | |
12509 | } | |
c906108c SS |
12510 | fip->nfields++; |
12511 | ||
e142c38c | 12512 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12513 | if (attr) |
12514 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12515 | else |
12516 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12517 | if (new_field->accessibility != DW_ACCESS_public) |
12518 | fip->non_public_fields = 1; | |
60d5a603 | 12519 | |
e142c38c | 12520 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12521 | if (attr) |
12522 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12523 | else |
12524 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12525 | |
12526 | fp = &new_field->field; | |
a9a9bd0f | 12527 | |
e142c38c | 12528 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12529 | { |
74ac6d43 TT |
12530 | LONGEST offset; |
12531 | ||
a9a9bd0f | 12532 | /* Data member other than a C++ static data member. */ |
6e70227d | 12533 | |
c906108c | 12534 | /* Get type of field. */ |
e7c27a73 | 12535 | fp->type = die_type (die, cu); |
c906108c | 12536 | |
d6a843b5 | 12537 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12538 | |
c906108c | 12539 | /* Get bit size of field (zero if none). */ |
e142c38c | 12540 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12541 | if (attr) |
12542 | { | |
12543 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12544 | } | |
12545 | else | |
12546 | { | |
12547 | FIELD_BITSIZE (*fp) = 0; | |
12548 | } | |
12549 | ||
12550 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12551 | if (handle_data_member_location (die, cu, &offset)) |
12552 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12553 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12554 | if (attr) |
12555 | { | |
5e2b427d | 12556 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12557 | { |
12558 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12559 | additional bit offset from the MSB of the containing |
12560 | anonymous object to the MSB of the field. We don't | |
12561 | have to do anything special since we don't need to | |
12562 | know the size of the anonymous object. */ | |
f41f5e61 | 12563 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12564 | } |
12565 | else | |
12566 | { | |
12567 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12568 | MSB of the anonymous object, subtract off the number of |
12569 | bits from the MSB of the field to the MSB of the | |
12570 | object, and then subtract off the number of bits of | |
12571 | the field itself. The result is the bit offset of | |
12572 | the LSB of the field. */ | |
c906108c SS |
12573 | int anonymous_size; |
12574 | int bit_offset = DW_UNSND (attr); | |
12575 | ||
e142c38c | 12576 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12577 | if (attr) |
12578 | { | |
12579 | /* The size of the anonymous object containing | |
12580 | the bit field is explicit, so use the | |
12581 | indicated size (in bytes). */ | |
12582 | anonymous_size = DW_UNSND (attr); | |
12583 | } | |
12584 | else | |
12585 | { | |
12586 | /* The size of the anonymous object containing | |
12587 | the bit field must be inferred from the type | |
12588 | attribute of the data member containing the | |
12589 | bit field. */ | |
12590 | anonymous_size = TYPE_LENGTH (fp->type); | |
12591 | } | |
f41f5e61 PA |
12592 | SET_FIELD_BITPOS (*fp, |
12593 | (FIELD_BITPOS (*fp) | |
12594 | + anonymous_size * bits_per_byte | |
12595 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
12596 | } |
12597 | } | |
12598 | ||
12599 | /* Get name of field. */ | |
39cbfefa DJ |
12600 | fieldname = dwarf2_name (die, cu); |
12601 | if (fieldname == NULL) | |
12602 | fieldname = ""; | |
d8151005 DJ |
12603 | |
12604 | /* The name is already allocated along with this objfile, so we don't | |
12605 | need to duplicate it for the type. */ | |
12606 | fp->name = fieldname; | |
c906108c SS |
12607 | |
12608 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 12609 | pointer or virtual base class pointer) to private. */ |
e142c38c | 12610 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 12611 | { |
d48cc9dd | 12612 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
12613 | new_field->accessibility = DW_ACCESS_private; |
12614 | fip->non_public_fields = 1; | |
12615 | } | |
12616 | } | |
a9a9bd0f | 12617 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 12618 | { |
a9a9bd0f DC |
12619 | /* C++ static member. */ |
12620 | ||
12621 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
12622 | is a declaration, but all versions of G++ as of this writing | |
12623 | (so through at least 3.2.1) incorrectly generate | |
12624 | DW_TAG_variable tags. */ | |
6e70227d | 12625 | |
ff355380 | 12626 | const char *physname; |
c906108c | 12627 | |
a9a9bd0f | 12628 | /* Get name of field. */ |
39cbfefa DJ |
12629 | fieldname = dwarf2_name (die, cu); |
12630 | if (fieldname == NULL) | |
c906108c SS |
12631 | return; |
12632 | ||
254e6b9e | 12633 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
12634 | if (attr |
12635 | /* Only create a symbol if this is an external value. | |
12636 | new_symbol checks this and puts the value in the global symbol | |
12637 | table, which we want. If it is not external, new_symbol | |
12638 | will try to put the value in cu->list_in_scope which is wrong. */ | |
12639 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
12640 | { |
12641 | /* A static const member, not much different than an enum as far as | |
12642 | we're concerned, except that we can support more types. */ | |
12643 | new_symbol (die, NULL, cu); | |
12644 | } | |
12645 | ||
2df3850c | 12646 | /* Get physical name. */ |
ff355380 | 12647 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 12648 | |
d8151005 DJ |
12649 | /* The name is already allocated along with this objfile, so we don't |
12650 | need to duplicate it for the type. */ | |
12651 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 12652 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 12653 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
12654 | } |
12655 | else if (die->tag == DW_TAG_inheritance) | |
12656 | { | |
74ac6d43 | 12657 | LONGEST offset; |
d4b96c9a | 12658 | |
74ac6d43 TT |
12659 | /* C++ base class field. */ |
12660 | if (handle_data_member_location (die, cu, &offset)) | |
12661 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 12662 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 12663 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
12664 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
12665 | fip->nbaseclasses++; | |
12666 | } | |
12667 | } | |
12668 | ||
98751a41 JK |
12669 | /* Add a typedef defined in the scope of the FIP's class. */ |
12670 | ||
12671 | static void | |
12672 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
12673 | struct dwarf2_cu *cu) | |
6e70227d | 12674 | { |
98751a41 | 12675 | struct typedef_field_list *new_field; |
98751a41 | 12676 | struct typedef_field *fp; |
98751a41 JK |
12677 | |
12678 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12679 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
12680 | make_cleanup (xfree, new_field); |
12681 | ||
12682 | gdb_assert (die->tag == DW_TAG_typedef); | |
12683 | ||
12684 | fp = &new_field->field; | |
12685 | ||
12686 | /* Get name of field. */ | |
12687 | fp->name = dwarf2_name (die, cu); | |
12688 | if (fp->name == NULL) | |
12689 | return; | |
12690 | ||
12691 | fp->type = read_type_die (die, cu); | |
12692 | ||
12693 | new_field->next = fip->typedef_field_list; | |
12694 | fip->typedef_field_list = new_field; | |
12695 | fip->typedef_field_list_count++; | |
12696 | } | |
12697 | ||
c906108c SS |
12698 | /* Create the vector of fields, and attach it to the type. */ |
12699 | ||
12700 | static void | |
fba45db2 | 12701 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12702 | struct dwarf2_cu *cu) |
c906108c SS |
12703 | { |
12704 | int nfields = fip->nfields; | |
12705 | ||
12706 | /* Record the field count, allocate space for the array of fields, | |
12707 | and create blank accessibility bitfields if necessary. */ | |
12708 | TYPE_NFIELDS (type) = nfields; | |
12709 | TYPE_FIELDS (type) = (struct field *) | |
12710 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
12711 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
12712 | ||
b4ba55a1 | 12713 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
12714 | { |
12715 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12716 | ||
12717 | TYPE_FIELD_PRIVATE_BITS (type) = | |
12718 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12719 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
12720 | ||
12721 | TYPE_FIELD_PROTECTED_BITS (type) = | |
12722 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12723 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
12724 | ||
774b6a14 TT |
12725 | TYPE_FIELD_IGNORE_BITS (type) = |
12726 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12727 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
12728 | } |
12729 | ||
12730 | /* If the type has baseclasses, allocate and clear a bit vector for | |
12731 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 12732 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
12733 | { |
12734 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 12735 | unsigned char *pointer; |
c906108c SS |
12736 | |
12737 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 12738 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 12739 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
12740 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
12741 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
12742 | } | |
12743 | ||
3e43a32a MS |
12744 | /* Copy the saved-up fields into the field vector. Start from the head of |
12745 | the list, adding to the tail of the field array, so that they end up in | |
12746 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
12747 | while (nfields-- > 0) |
12748 | { | |
7d0ccb61 DJ |
12749 | struct nextfield *fieldp; |
12750 | ||
12751 | if (fip->fields) | |
12752 | { | |
12753 | fieldp = fip->fields; | |
12754 | fip->fields = fieldp->next; | |
12755 | } | |
12756 | else | |
12757 | { | |
12758 | fieldp = fip->baseclasses; | |
12759 | fip->baseclasses = fieldp->next; | |
12760 | } | |
12761 | ||
12762 | TYPE_FIELD (type, nfields) = fieldp->field; | |
12763 | switch (fieldp->accessibility) | |
c906108c | 12764 | { |
c5aa993b | 12765 | case DW_ACCESS_private: |
b4ba55a1 JB |
12766 | if (cu->language != language_ada) |
12767 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 12768 | break; |
c906108c | 12769 | |
c5aa993b | 12770 | case DW_ACCESS_protected: |
b4ba55a1 JB |
12771 | if (cu->language != language_ada) |
12772 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 12773 | break; |
c906108c | 12774 | |
c5aa993b JM |
12775 | case DW_ACCESS_public: |
12776 | break; | |
c906108c | 12777 | |
c5aa993b JM |
12778 | default: |
12779 | /* Unknown accessibility. Complain and treat it as public. */ | |
12780 | { | |
e2e0b3e5 | 12781 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 12782 | fieldp->accessibility); |
c5aa993b JM |
12783 | } |
12784 | break; | |
c906108c SS |
12785 | } |
12786 | if (nfields < fip->nbaseclasses) | |
12787 | { | |
7d0ccb61 | 12788 | switch (fieldp->virtuality) |
c906108c | 12789 | { |
c5aa993b JM |
12790 | case DW_VIRTUALITY_virtual: |
12791 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 12792 | if (cu->language == language_ada) |
a73c6dcd | 12793 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
12794 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
12795 | break; | |
c906108c SS |
12796 | } |
12797 | } | |
c906108c SS |
12798 | } |
12799 | } | |
12800 | ||
7d27a96d TT |
12801 | /* Return true if this member function is a constructor, false |
12802 | otherwise. */ | |
12803 | ||
12804 | static int | |
12805 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
12806 | { | |
12807 | const char *fieldname; | |
fe978cb0 | 12808 | const char *type_name; |
7d27a96d TT |
12809 | int len; |
12810 | ||
12811 | if (die->parent == NULL) | |
12812 | return 0; | |
12813 | ||
12814 | if (die->parent->tag != DW_TAG_structure_type | |
12815 | && die->parent->tag != DW_TAG_union_type | |
12816 | && die->parent->tag != DW_TAG_class_type) | |
12817 | return 0; | |
12818 | ||
12819 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
12820 | type_name = dwarf2_name (die->parent, cu); |
12821 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
12822 | return 0; |
12823 | ||
12824 | len = strlen (fieldname); | |
fe978cb0 PA |
12825 | return (strncmp (fieldname, type_name, len) == 0 |
12826 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
12827 | } |
12828 | ||
c906108c SS |
12829 | /* Add a member function to the proper fieldlist. */ |
12830 | ||
12831 | static void | |
107d2387 | 12832 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12833 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 12834 | { |
e7c27a73 | 12835 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12836 | struct attribute *attr; |
12837 | struct fnfieldlist *flp; | |
12838 | int i; | |
12839 | struct fn_field *fnp; | |
15d034d0 | 12840 | const char *fieldname; |
c906108c | 12841 | struct nextfnfield *new_fnfield; |
f792889a | 12842 | struct type *this_type; |
60d5a603 | 12843 | enum dwarf_access_attribute accessibility; |
c906108c | 12844 | |
b4ba55a1 | 12845 | if (cu->language == language_ada) |
a73c6dcd | 12846 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 12847 | |
2df3850c | 12848 | /* Get name of member function. */ |
39cbfefa DJ |
12849 | fieldname = dwarf2_name (die, cu); |
12850 | if (fieldname == NULL) | |
2df3850c | 12851 | return; |
c906108c | 12852 | |
c906108c SS |
12853 | /* Look up member function name in fieldlist. */ |
12854 | for (i = 0; i < fip->nfnfields; i++) | |
12855 | { | |
27bfe10e | 12856 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
12857 | break; |
12858 | } | |
12859 | ||
12860 | /* Create new list element if necessary. */ | |
12861 | if (i < fip->nfnfields) | |
12862 | flp = &fip->fnfieldlists[i]; | |
12863 | else | |
12864 | { | |
12865 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12866 | { | |
12867 | fip->fnfieldlists = (struct fnfieldlist *) | |
12868 | xrealloc (fip->fnfieldlists, | |
12869 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12870 | * sizeof (struct fnfieldlist)); |
c906108c | 12871 | if (fip->nfnfields == 0) |
c13c43fd | 12872 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
12873 | } |
12874 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
12875 | flp->name = fieldname; | |
12876 | flp->length = 0; | |
12877 | flp->head = NULL; | |
3da10d80 | 12878 | i = fip->nfnfields++; |
c906108c SS |
12879 | } |
12880 | ||
12881 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 12882 | entry. */ |
8d749320 | 12883 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 12884 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
12885 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
12886 | new_fnfield->next = flp->head; | |
12887 | flp->head = new_fnfield; | |
12888 | flp->length++; | |
12889 | ||
12890 | /* Fill in the member function field info. */ | |
12891 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
12892 | |
12893 | /* Delay processing of the physname until later. */ | |
12894 | if (cu->language == language_cplus || cu->language == language_java) | |
12895 | { | |
12896 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
12897 | die, cu); | |
12898 | } | |
12899 | else | |
12900 | { | |
1d06ead6 | 12901 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
12902 | fnp->physname = physname ? physname : ""; |
12903 | } | |
12904 | ||
c906108c | 12905 | fnp->type = alloc_type (objfile); |
f792889a DJ |
12906 | this_type = read_type_die (die, cu); |
12907 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 12908 | { |
f792889a | 12909 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 12910 | |
f792889a | 12911 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
12912 | of the method itself (TYPE_CODE_METHOD). */ |
12913 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
12914 | TYPE_TARGET_TYPE (this_type), |
12915 | TYPE_FIELDS (this_type), | |
12916 | TYPE_NFIELDS (this_type), | |
12917 | TYPE_VARARGS (this_type)); | |
c906108c SS |
12918 | |
12919 | /* Handle static member functions. | |
c5aa993b | 12920 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
12921 | member functions. G++ helps GDB by marking the first |
12922 | parameter for non-static member functions (which is the this | |
12923 | pointer) as artificial. We obtain this information from | |
12924 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 12925 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
12926 | fnp->voffset = VOFFSET_STATIC; |
12927 | } | |
12928 | else | |
e2e0b3e5 | 12929 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 12930 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
12931 | |
12932 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 12933 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 12934 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 12935 | |
3e43a32a MS |
12936 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
12937 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
12938 | |
12939 | /* Get accessibility. */ | |
e142c38c | 12940 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 12941 | if (attr) |
aead7601 | 12942 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
12943 | else |
12944 | accessibility = dwarf2_default_access_attribute (die, cu); | |
12945 | switch (accessibility) | |
c906108c | 12946 | { |
60d5a603 JK |
12947 | case DW_ACCESS_private: |
12948 | fnp->is_private = 1; | |
12949 | break; | |
12950 | case DW_ACCESS_protected: | |
12951 | fnp->is_protected = 1; | |
12952 | break; | |
c906108c SS |
12953 | } |
12954 | ||
b02dede2 | 12955 | /* Check for artificial methods. */ |
e142c38c | 12956 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
12957 | if (attr && DW_UNSND (attr) != 0) |
12958 | fnp->is_artificial = 1; | |
12959 | ||
7d27a96d TT |
12960 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
12961 | ||
0d564a31 | 12962 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
12963 | function. For older versions of GCC, this is an offset in the |
12964 | appropriate virtual table, as specified by DW_AT_containing_type. | |
12965 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
12966 | to the object address. */ |
12967 | ||
e142c38c | 12968 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 12969 | if (attr) |
8e19ed76 | 12970 | { |
aec5aa8b | 12971 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 12972 | { |
aec5aa8b TT |
12973 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
12974 | { | |
12975 | /* Old-style GCC. */ | |
12976 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
12977 | } | |
12978 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12979 | || (DW_BLOCK (attr)->size > 1 | |
12980 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
12981 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
12982 | { | |
aec5aa8b TT |
12983 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
12984 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
12985 | dwarf2_complex_location_expr_complaint (); | |
12986 | else | |
12987 | fnp->voffset /= cu->header.addr_size; | |
12988 | fnp->voffset += 2; | |
12989 | } | |
12990 | else | |
12991 | dwarf2_complex_location_expr_complaint (); | |
12992 | ||
12993 | if (!fnp->fcontext) | |
7e993ebf KS |
12994 | { |
12995 | /* If there is no `this' field and no DW_AT_containing_type, | |
12996 | we cannot actually find a base class context for the | |
12997 | vtable! */ | |
12998 | if (TYPE_NFIELDS (this_type) == 0 | |
12999 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
13000 | { | |
13001 | complaint (&symfile_complaints, | |
13002 | _("cannot determine context for virtual member " | |
13003 | "function \"%s\" (offset %d)"), | |
13004 | fieldname, die->offset.sect_off); | |
13005 | } | |
13006 | else | |
13007 | { | |
13008 | fnp->fcontext | |
13009 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
13010 | } | |
13011 | } | |
aec5aa8b | 13012 | } |
3690dd37 | 13013 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 13014 | { |
4d3c2250 | 13015 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13016 | } |
13017 | else | |
13018 | { | |
4d3c2250 KB |
13019 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
13020 | fieldname); | |
8e19ed76 | 13021 | } |
0d564a31 | 13022 | } |
d48cc9dd DJ |
13023 | else |
13024 | { | |
13025 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
13026 | if (attr && DW_UNSND (attr)) | |
13027 | { | |
13028 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
13029 | complaint (&symfile_complaints, | |
3e43a32a MS |
13030 | _("Member function \"%s\" (offset %d) is virtual " |
13031 | "but the vtable offset is not specified"), | |
b64f50a1 | 13032 | fieldname, die->offset.sect_off); |
9655fd1a | 13033 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
13034 | TYPE_CPLUS_DYNAMIC (type) = 1; |
13035 | } | |
13036 | } | |
c906108c SS |
13037 | } |
13038 | ||
13039 | /* Create the vector of member function fields, and attach it to the type. */ | |
13040 | ||
13041 | static void | |
fba45db2 | 13042 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13043 | struct dwarf2_cu *cu) |
c906108c SS |
13044 | { |
13045 | struct fnfieldlist *flp; | |
c906108c SS |
13046 | int i; |
13047 | ||
b4ba55a1 | 13048 | if (cu->language == language_ada) |
a73c6dcd | 13049 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 13050 | |
c906108c SS |
13051 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
13052 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
13053 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
13054 | ||
13055 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
13056 | { | |
13057 | struct nextfnfield *nfp = flp->head; | |
13058 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
13059 | int k; | |
13060 | ||
13061 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
13062 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
13063 | fn_flp->fn_fields = (struct fn_field *) | |
13064 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
13065 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 13066 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
13067 | } |
13068 | ||
13069 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
13070 | } |
13071 | ||
1168df01 JB |
13072 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
13073 | language, zero otherwise. */ | |
13074 | static int | |
13075 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
13076 | { | |
13077 | static const char vptr[] = "_vptr"; | |
987504bb | 13078 | static const char vtable[] = "vtable"; |
1168df01 | 13079 | |
987504bb JJ |
13080 | /* Look for the C++ and Java forms of the vtable. */ |
13081 | if ((cu->language == language_java | |
61012eef GB |
13082 | && startswith (name, vtable)) |
13083 | || (startswith (name, vptr) | |
987504bb | 13084 | && is_cplus_marker (name[sizeof (vptr) - 1]))) |
1168df01 JB |
13085 | return 1; |
13086 | ||
13087 | return 0; | |
13088 | } | |
13089 | ||
c0dd20ea | 13090 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
13091 | functions, with the ABI-specified layout. If TYPE describes |
13092 | such a structure, smash it into a member function type. | |
61049d3b DJ |
13093 | |
13094 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
13095 | This is GCC PR debug/28767. */ | |
c0dd20ea | 13096 | |
0b92b5bb TT |
13097 | static void |
13098 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 13099 | { |
09e2d7c7 | 13100 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
13101 | |
13102 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
13103 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
13104 | return; | |
c0dd20ea DJ |
13105 | |
13106 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
13107 | if (TYPE_FIELD_NAME (type, 0) == NULL |
13108 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
13109 | || TYPE_FIELD_NAME (type, 1) == NULL | |
13110 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
13111 | return; | |
c0dd20ea DJ |
13112 | |
13113 | /* Find the type of the method. */ | |
0b92b5bb | 13114 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
13115 | if (pfn_type == NULL |
13116 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
13117 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 13118 | return; |
c0dd20ea DJ |
13119 | |
13120 | /* Look for the "this" argument. */ | |
13121 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
13122 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 13123 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 13124 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 13125 | return; |
c0dd20ea | 13126 | |
09e2d7c7 | 13127 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 13128 | new_type = alloc_type (objfile); |
09e2d7c7 | 13129 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
13130 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
13131 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 13132 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 13133 | } |
1168df01 | 13134 | |
685b1105 JK |
13135 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
13136 | (icc). */ | |
13137 | ||
13138 | static int | |
13139 | producer_is_icc (struct dwarf2_cu *cu) | |
13140 | { | |
13141 | if (!cu->checked_producer) | |
13142 | check_producer (cu); | |
13143 | ||
13144 | return cu->producer_is_icc; | |
13145 | } | |
13146 | ||
c906108c | 13147 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
13148 | (definition) to create a type for the structure or union. Fill in |
13149 | the type's name and general properties; the members will not be | |
83655187 DE |
13150 | processed until process_structure_scope. A symbol table entry for |
13151 | the type will also not be done until process_structure_scope (assuming | |
13152 | the type has a name). | |
c906108c | 13153 | |
c767944b DJ |
13154 | NOTE: we need to call these functions regardless of whether or not the |
13155 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 13156 | structure or union. This gets the type entered into our set of |
83655187 | 13157 | user defined types. */ |
c906108c | 13158 | |
f792889a | 13159 | static struct type * |
134d01f1 | 13160 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13161 | { |
e7c27a73 | 13162 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13163 | struct type *type; |
13164 | struct attribute *attr; | |
15d034d0 | 13165 | const char *name; |
c906108c | 13166 | |
348e048f DE |
13167 | /* If the definition of this type lives in .debug_types, read that type. |
13168 | Don't follow DW_AT_specification though, that will take us back up | |
13169 | the chain and we want to go down. */ | |
45e58e77 | 13170 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13171 | if (attr) |
13172 | { | |
ac9ec31b | 13173 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13174 | |
ac9ec31b | 13175 | /* The type's CU may not be the same as CU. |
02142a6c | 13176 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13177 | return set_die_type (die, type, cu); |
13178 | } | |
13179 | ||
c0dd20ea | 13180 | type = alloc_type (objfile); |
c906108c | 13181 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 13182 | |
39cbfefa DJ |
13183 | name = dwarf2_name (die, cu); |
13184 | if (name != NULL) | |
c906108c | 13185 | { |
987504bb | 13186 | if (cu->language == language_cplus |
45280282 | 13187 | || cu->language == language_java |
c44af4eb TT |
13188 | || cu->language == language_d |
13189 | || cu->language == language_rust) | |
63d06c5c | 13190 | { |
15d034d0 | 13191 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
13192 | |
13193 | /* dwarf2_full_name might have already finished building the DIE's | |
13194 | type. If so, there is no need to continue. */ | |
13195 | if (get_die_type (die, cu) != NULL) | |
13196 | return get_die_type (die, cu); | |
13197 | ||
13198 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
13199 | if (die->tag == DW_TAG_structure_type |
13200 | || die->tag == DW_TAG_class_type) | |
13201 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
13202 | } |
13203 | else | |
13204 | { | |
d8151005 DJ |
13205 | /* The name is already allocated along with this objfile, so |
13206 | we don't need to duplicate it for the type. */ | |
7d455152 | 13207 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
13208 | if (die->tag == DW_TAG_class_type) |
13209 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 13210 | } |
c906108c SS |
13211 | } |
13212 | ||
13213 | if (die->tag == DW_TAG_structure_type) | |
13214 | { | |
13215 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
13216 | } | |
13217 | else if (die->tag == DW_TAG_union_type) | |
13218 | { | |
13219 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
13220 | } | |
13221 | else | |
13222 | { | |
4753d33b | 13223 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
13224 | } |
13225 | ||
0cc2414c TT |
13226 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
13227 | TYPE_DECLARED_CLASS (type) = 1; | |
13228 | ||
e142c38c | 13229 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13230 | if (attr) |
13231 | { | |
155bfbd3 JB |
13232 | if (attr_form_is_constant (attr)) |
13233 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13234 | else | |
13235 | { | |
13236 | /* For the moment, dynamic type sizes are not supported | |
13237 | by GDB's struct type. The actual size is determined | |
13238 | on-demand when resolving the type of a given object, | |
13239 | so set the type's length to zero for now. Otherwise, | |
13240 | we record an expression as the length, and that expression | |
13241 | could lead to a very large value, which could eventually | |
13242 | lead to us trying to allocate that much memory when creating | |
13243 | a value of that type. */ | |
13244 | TYPE_LENGTH (type) = 0; | |
13245 | } | |
c906108c SS |
13246 | } |
13247 | else | |
13248 | { | |
13249 | TYPE_LENGTH (type) = 0; | |
13250 | } | |
13251 | ||
422b1cb0 | 13252 | if (producer_is_icc (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 JK |
13253 | { |
13254 | /* ICC does not output the required DW_AT_declaration | |
13255 | on incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 13256 | TYPE_STUB (type) = 1; |
685b1105 JK |
13257 | } |
13258 | else | |
13259 | TYPE_STUB_SUPPORTED (type) = 1; | |
13260 | ||
dc718098 | 13261 | if (die_is_declaration (die, cu)) |
876cecd0 | 13262 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
13263 | else if (attr == NULL && die->child == NULL |
13264 | && producer_is_realview (cu->producer)) | |
13265 | /* RealView does not output the required DW_AT_declaration | |
13266 | on incomplete types. */ | |
13267 | TYPE_STUB (type) = 1; | |
dc718098 | 13268 | |
c906108c SS |
13269 | /* We need to add the type field to the die immediately so we don't |
13270 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13271 | type within the structure itself. */ |
1c379e20 | 13272 | set_die_type (die, type, cu); |
c906108c | 13273 | |
7e314c57 JK |
13274 | /* set_die_type should be already done. */ |
13275 | set_descriptive_type (type, die, cu); | |
13276 | ||
c767944b DJ |
13277 | return type; |
13278 | } | |
13279 | ||
13280 | /* Finish creating a structure or union type, including filling in | |
13281 | its members and creating a symbol for it. */ | |
13282 | ||
13283 | static void | |
13284 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13285 | { | |
13286 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13287 | struct die_info *child_die; |
c767944b DJ |
13288 | struct type *type; |
13289 | ||
13290 | type = get_die_type (die, cu); | |
13291 | if (type == NULL) | |
13292 | type = read_structure_type (die, cu); | |
13293 | ||
e142c38c | 13294 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13295 | { |
13296 | struct field_info fi; | |
34eaf542 | 13297 | VEC (symbolp) *template_args = NULL; |
c767944b | 13298 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13299 | |
13300 | memset (&fi, 0, sizeof (struct field_info)); | |
13301 | ||
639d11d3 | 13302 | child_die = die->child; |
c906108c SS |
13303 | |
13304 | while (child_die && child_die->tag) | |
13305 | { | |
a9a9bd0f DC |
13306 | if (child_die->tag == DW_TAG_member |
13307 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13308 | { |
a9a9bd0f DC |
13309 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13310 | should be a DW_TAG_member that is a declaration, but | |
13311 | all versions of G++ as of this writing (so through at | |
13312 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13313 | tags for them instead. */ | |
e7c27a73 | 13314 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13315 | } |
8713b1b1 | 13316 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13317 | { |
0963b4bd | 13318 | /* C++ member function. */ |
e7c27a73 | 13319 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
13320 | } |
13321 | else if (child_die->tag == DW_TAG_inheritance) | |
13322 | { | |
13323 | /* C++ base class field. */ | |
e7c27a73 | 13324 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13325 | } |
98751a41 JK |
13326 | else if (child_die->tag == DW_TAG_typedef) |
13327 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13328 | else if (child_die->tag == DW_TAG_template_type_param |
13329 | || child_die->tag == DW_TAG_template_value_param) | |
13330 | { | |
13331 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13332 | ||
f1078f66 DJ |
13333 | if (arg != NULL) |
13334 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13335 | } |
13336 | ||
c906108c SS |
13337 | child_die = sibling_die (child_die); |
13338 | } | |
13339 | ||
34eaf542 TT |
13340 | /* Attach template arguments to type. */ |
13341 | if (! VEC_empty (symbolp, template_args)) | |
13342 | { | |
13343 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13344 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13345 | = VEC_length (symbolp, template_args); | |
13346 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
13347 | = XOBNEWVEC (&objfile->objfile_obstack, |
13348 | struct symbol *, | |
13349 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
13350 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
13351 | VEC_address (symbolp, template_args), | |
13352 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13353 | * sizeof (struct symbol *))); | |
13354 | VEC_free (symbolp, template_args); | |
13355 | } | |
13356 | ||
c906108c SS |
13357 | /* Attach fields and member functions to the type. */ |
13358 | if (fi.nfields) | |
e7c27a73 | 13359 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13360 | if (fi.nfnfields) |
13361 | { | |
e7c27a73 | 13362 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13363 | |
c5aa993b | 13364 | /* Get the type which refers to the base class (possibly this |
c906108c | 13365 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13366 | class from the DW_AT_containing_type attribute. This use of |
13367 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13368 | |
e142c38c | 13369 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13370 | { |
e7c27a73 | 13371 | struct type *t = die_containing_type (die, cu); |
c906108c | 13372 | |
ae6ae975 | 13373 | set_type_vptr_basetype (type, t); |
c906108c SS |
13374 | if (type == t) |
13375 | { | |
c906108c SS |
13376 | int i; |
13377 | ||
13378 | /* Our own class provides vtbl ptr. */ | |
13379 | for (i = TYPE_NFIELDS (t) - 1; | |
13380 | i >= TYPE_N_BASECLASSES (t); | |
13381 | --i) | |
13382 | { | |
0d5cff50 | 13383 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13384 | |
1168df01 | 13385 | if (is_vtable_name (fieldname, cu)) |
c906108c | 13386 | { |
ae6ae975 | 13387 | set_type_vptr_fieldno (type, i); |
c906108c SS |
13388 | break; |
13389 | } | |
13390 | } | |
13391 | ||
13392 | /* Complain if virtual function table field not found. */ | |
13393 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13394 | complaint (&symfile_complaints, |
3e43a32a MS |
13395 | _("virtual function table pointer " |
13396 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13397 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13398 | ""); | |
c906108c SS |
13399 | } |
13400 | else | |
13401 | { | |
ae6ae975 | 13402 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
13403 | } |
13404 | } | |
f6235d4c | 13405 | else if (cu->producer |
61012eef | 13406 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
13407 | { |
13408 | /* The IBM XLC compiler does not provide direct indication | |
13409 | of the containing type, but the vtable pointer is | |
13410 | always named __vfp. */ | |
13411 | ||
13412 | int i; | |
13413 | ||
13414 | for (i = TYPE_NFIELDS (type) - 1; | |
13415 | i >= TYPE_N_BASECLASSES (type); | |
13416 | --i) | |
13417 | { | |
13418 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13419 | { | |
ae6ae975 DE |
13420 | set_type_vptr_fieldno (type, i); |
13421 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
13422 | break; |
13423 | } | |
13424 | } | |
13425 | } | |
c906108c | 13426 | } |
98751a41 JK |
13427 | |
13428 | /* Copy fi.typedef_field_list linked list elements content into the | |
13429 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13430 | if (fi.typedef_field_list) | |
13431 | { | |
13432 | int i = fi.typedef_field_list_count; | |
13433 | ||
a0d7a4ff | 13434 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 13435 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
13436 | = ((struct typedef_field *) |
13437 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
13438 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
13439 | ||
13440 | /* Reverse the list order to keep the debug info elements order. */ | |
13441 | while (--i >= 0) | |
13442 | { | |
13443 | struct typedef_field *dest, *src; | |
6e70227d | 13444 | |
98751a41 JK |
13445 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13446 | src = &fi.typedef_field_list->field; | |
13447 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13448 | *dest = *src; | |
13449 | } | |
13450 | } | |
c767944b DJ |
13451 | |
13452 | do_cleanups (back_to); | |
eb2a6f42 TT |
13453 | |
13454 | if (HAVE_CPLUS_STRUCT (type)) | |
13455 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
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. */ | |
14122 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
14123 | objfile); | |
abee88f2 | 14124 | TYPE_NAME (type) = name; |
0114d602 DJ |
14125 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
14126 | ||
60531b24 | 14127 | return set_die_type (die, type, cu); |
0114d602 DJ |
14128 | } |
14129 | ||
22cee43f | 14130 | /* Read a namespace scope. */ |
0114d602 DJ |
14131 | |
14132 | static void | |
14133 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
14134 | { | |
14135 | struct objfile *objfile = cu->objfile; | |
0114d602 | 14136 | int is_anonymous; |
9219021c | 14137 | |
5c4e30ca DC |
14138 | /* Add a symbol associated to this if we haven't seen the namespace |
14139 | before. Also, add a using directive if it's an anonymous | |
14140 | namespace. */ | |
9219021c | 14141 | |
f2f0e013 | 14142 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
14143 | { |
14144 | struct type *type; | |
14145 | ||
0114d602 | 14146 | type = read_type_die (die, cu); |
e7c27a73 | 14147 | new_symbol (die, type, cu); |
5c4e30ca | 14148 | |
e8e80198 | 14149 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 14150 | if (is_anonymous) |
0114d602 DJ |
14151 | { |
14152 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 14153 | |
22cee43f PMR |
14154 | add_using_directive (using_directives (cu->language), |
14155 | previous_prefix, TYPE_NAME (type), NULL, | |
14156 | NULL, NULL, 0, &objfile->objfile_obstack); | |
0114d602 | 14157 | } |
5c4e30ca | 14158 | } |
9219021c | 14159 | |
639d11d3 | 14160 | if (die->child != NULL) |
d9fa45fe | 14161 | { |
639d11d3 | 14162 | struct die_info *child_die = die->child; |
6e70227d | 14163 | |
d9fa45fe DC |
14164 | while (child_die && child_die->tag) |
14165 | { | |
e7c27a73 | 14166 | process_die (child_die, cu); |
d9fa45fe DC |
14167 | child_die = sibling_die (child_die); |
14168 | } | |
14169 | } | |
38d518c9 EZ |
14170 | } |
14171 | ||
f55ee35c JK |
14172 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
14173 | imported module. Still we need that type as local Fortran "use ... only" | |
14174 | declaration imports depend on the created type in determine_prefix. */ | |
14175 | ||
14176 | static struct type * | |
14177 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
14178 | { | |
14179 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 14180 | const char *module_name; |
f55ee35c JK |
14181 | struct type *type; |
14182 | ||
14183 | module_name = dwarf2_name (die, cu); | |
14184 | if (!module_name) | |
3e43a32a MS |
14185 | complaint (&symfile_complaints, |
14186 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 14187 | die->offset.sect_off); |
f55ee35c JK |
14188 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
14189 | ||
14190 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
14191 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
14192 | ||
14193 | return set_die_type (die, type, cu); | |
14194 | } | |
14195 | ||
5d7cb8df JK |
14196 | /* Read a Fortran module. */ |
14197 | ||
14198 | static void | |
14199 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
14200 | { | |
14201 | struct die_info *child_die = die->child; | |
530e8392 KB |
14202 | struct type *type; |
14203 | ||
14204 | type = read_type_die (die, cu); | |
14205 | new_symbol (die, type, cu); | |
5d7cb8df | 14206 | |
5d7cb8df JK |
14207 | while (child_die && child_die->tag) |
14208 | { | |
14209 | process_die (child_die, cu); | |
14210 | child_die = sibling_die (child_die); | |
14211 | } | |
14212 | } | |
14213 | ||
38d518c9 EZ |
14214 | /* Return the name of the namespace represented by DIE. Set |
14215 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
14216 | namespace. */ | |
14217 | ||
14218 | static const char * | |
e142c38c | 14219 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
14220 | { |
14221 | struct die_info *current_die; | |
14222 | const char *name = NULL; | |
14223 | ||
14224 | /* Loop through the extensions until we find a name. */ | |
14225 | ||
14226 | for (current_die = die; | |
14227 | current_die != NULL; | |
f2f0e013 | 14228 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 14229 | { |
96553a0c DE |
14230 | /* We don't use dwarf2_name here so that we can detect the absence |
14231 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 14232 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 14233 | |
38d518c9 EZ |
14234 | if (name != NULL) |
14235 | break; | |
14236 | } | |
14237 | ||
14238 | /* Is it an anonymous namespace? */ | |
14239 | ||
14240 | *is_anonymous = (name == NULL); | |
14241 | if (*is_anonymous) | |
2b1dbab0 | 14242 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
14243 | |
14244 | return name; | |
d9fa45fe DC |
14245 | } |
14246 | ||
c906108c SS |
14247 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
14248 | the user defined type vector. */ | |
14249 | ||
f792889a | 14250 | static struct type * |
e7c27a73 | 14251 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14252 | { |
5e2b427d | 14253 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 14254 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 14255 | struct type *type; |
8b2dbe47 KB |
14256 | struct attribute *attr_byte_size; |
14257 | struct attribute *attr_address_class; | |
14258 | int byte_size, addr_class; | |
7e314c57 JK |
14259 | struct type *target_type; |
14260 | ||
14261 | target_type = die_type (die, cu); | |
c906108c | 14262 | |
7e314c57 JK |
14263 | /* The die_type call above may have already set the type for this DIE. */ |
14264 | type = get_die_type (die, cu); | |
14265 | if (type) | |
14266 | return type; | |
14267 | ||
14268 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 14269 | |
e142c38c | 14270 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
14271 | if (attr_byte_size) |
14272 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 14273 | else |
8b2dbe47 KB |
14274 | byte_size = cu_header->addr_size; |
14275 | ||
e142c38c | 14276 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14277 | if (attr_address_class) |
14278 | addr_class = DW_UNSND (attr_address_class); | |
14279 | else | |
14280 | addr_class = DW_ADDR_none; | |
14281 | ||
14282 | /* If the pointer size or address class is different than the | |
14283 | default, create a type variant marked as such and set the | |
14284 | length accordingly. */ | |
14285 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14286 | { |
5e2b427d | 14287 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14288 | { |
14289 | int type_flags; | |
14290 | ||
849957d9 | 14291 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14292 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14293 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14294 | == 0); | |
8b2dbe47 KB |
14295 | type = make_type_with_address_space (type, type_flags); |
14296 | } | |
14297 | else if (TYPE_LENGTH (type) != byte_size) | |
14298 | { | |
3e43a32a MS |
14299 | complaint (&symfile_complaints, |
14300 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14301 | } |
6e70227d | 14302 | else |
9a619af0 MS |
14303 | { |
14304 | /* Should we also complain about unhandled address classes? */ | |
14305 | } | |
c906108c | 14306 | } |
8b2dbe47 KB |
14307 | |
14308 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14309 | return set_die_type (die, type, cu); |
c906108c SS |
14310 | } |
14311 | ||
14312 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14313 | the user defined type vector. */ | |
14314 | ||
f792889a | 14315 | static struct type * |
e7c27a73 | 14316 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14317 | { |
14318 | struct type *type; | |
14319 | struct type *to_type; | |
14320 | struct type *domain; | |
14321 | ||
e7c27a73 DJ |
14322 | to_type = die_type (die, cu); |
14323 | domain = die_containing_type (die, cu); | |
0d5de010 | 14324 | |
7e314c57 JK |
14325 | /* The calls above may have already set the type for this DIE. */ |
14326 | type = get_die_type (die, cu); | |
14327 | if (type) | |
14328 | return type; | |
14329 | ||
0d5de010 DJ |
14330 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14331 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14332 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14333 | { | |
14334 | struct type *new_type = alloc_type (cu->objfile); | |
14335 | ||
14336 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14337 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14338 | TYPE_VARARGS (to_type)); | |
14339 | type = lookup_methodptr_type (new_type); | |
14340 | } | |
0d5de010 DJ |
14341 | else |
14342 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14343 | |
f792889a | 14344 | return set_die_type (die, type, cu); |
c906108c SS |
14345 | } |
14346 | ||
14347 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
14348 | the user defined type vector. */ | |
14349 | ||
f792889a | 14350 | static struct type * |
e7c27a73 | 14351 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14352 | { |
e7c27a73 | 14353 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14354 | struct type *type, *target_type; |
c906108c SS |
14355 | struct attribute *attr; |
14356 | ||
7e314c57 JK |
14357 | target_type = die_type (die, cu); |
14358 | ||
14359 | /* The die_type call above may have already set the type for this DIE. */ | |
14360 | type = get_die_type (die, cu); | |
14361 | if (type) | |
14362 | return type; | |
14363 | ||
14364 | type = lookup_reference_type (target_type); | |
e142c38c | 14365 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14366 | if (attr) |
14367 | { | |
14368 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14369 | } | |
14370 | else | |
14371 | { | |
107d2387 | 14372 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14373 | } |
f792889a | 14374 | return set_die_type (die, type, cu); |
c906108c SS |
14375 | } |
14376 | ||
cf363f18 MW |
14377 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14378 | outputs DWARF type qualifiers that apply to an array, not the | |
14379 | element type. But GDB relies on the array element type to carry | |
14380 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14381 | specification. */ | |
14382 | ||
14383 | static struct type * | |
14384 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14385 | struct type *base_type, int cnst, int voltl) | |
14386 | { | |
14387 | struct type *el_type, *inner_array; | |
14388 | ||
14389 | base_type = copy_type (base_type); | |
14390 | inner_array = base_type; | |
14391 | ||
14392 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14393 | { | |
14394 | TYPE_TARGET_TYPE (inner_array) = | |
14395 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14396 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14397 | } | |
14398 | ||
14399 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14400 | cnst |= TYPE_CONST (el_type); | |
14401 | voltl |= TYPE_VOLATILE (el_type); | |
14402 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14403 | ||
14404 | return set_die_type (die, base_type, cu); | |
14405 | } | |
14406 | ||
f792889a | 14407 | static struct type * |
e7c27a73 | 14408 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14409 | { |
f792889a | 14410 | struct type *base_type, *cv_type; |
c906108c | 14411 | |
e7c27a73 | 14412 | base_type = die_type (die, cu); |
7e314c57 JK |
14413 | |
14414 | /* The die_type call above may have already set the type for this DIE. */ | |
14415 | cv_type = get_die_type (die, cu); | |
14416 | if (cv_type) | |
14417 | return cv_type; | |
14418 | ||
2f608a3a KW |
14419 | /* In case the const qualifier is applied to an array type, the element type |
14420 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14421 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14422 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14423 | |
f792889a DJ |
14424 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14425 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14426 | } |
14427 | ||
f792889a | 14428 | static struct type * |
e7c27a73 | 14429 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14430 | { |
f792889a | 14431 | struct type *base_type, *cv_type; |
c906108c | 14432 | |
e7c27a73 | 14433 | base_type = die_type (die, cu); |
7e314c57 JK |
14434 | |
14435 | /* The die_type call above may have already set the type for this DIE. */ | |
14436 | cv_type = get_die_type (die, cu); | |
14437 | if (cv_type) | |
14438 | return cv_type; | |
14439 | ||
cf363f18 MW |
14440 | /* In case the volatile qualifier is applied to an array type, the |
14441 | element type is so qualified, not the array type (section 6.7.3 | |
14442 | of C99). */ | |
14443 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14444 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14445 | ||
f792889a DJ |
14446 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14447 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14448 | } |
14449 | ||
06d66ee9 TT |
14450 | /* Handle DW_TAG_restrict_type. */ |
14451 | ||
14452 | static struct type * | |
14453 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14454 | { | |
14455 | struct type *base_type, *cv_type; | |
14456 | ||
14457 | base_type = die_type (die, cu); | |
14458 | ||
14459 | /* The die_type call above may have already set the type for this DIE. */ | |
14460 | cv_type = get_die_type (die, cu); | |
14461 | if (cv_type) | |
14462 | return cv_type; | |
14463 | ||
14464 | cv_type = make_restrict_type (base_type); | |
14465 | return set_die_type (die, cv_type, cu); | |
14466 | } | |
14467 | ||
a2c2acaf MW |
14468 | /* Handle DW_TAG_atomic_type. */ |
14469 | ||
14470 | static struct type * | |
14471 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
14472 | { | |
14473 | struct type *base_type, *cv_type; | |
14474 | ||
14475 | base_type = die_type (die, cu); | |
14476 | ||
14477 | /* The die_type call above may have already set the type for this DIE. */ | |
14478 | cv_type = get_die_type (die, cu); | |
14479 | if (cv_type) | |
14480 | return cv_type; | |
14481 | ||
14482 | cv_type = make_atomic_type (base_type); | |
14483 | return set_die_type (die, cv_type, cu); | |
14484 | } | |
14485 | ||
c906108c SS |
14486 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14487 | the user defined type vector. It isn't really a user defined type, | |
14488 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14489 | attribute to reference it. */ | |
14490 | ||
f792889a | 14491 | static struct type * |
e7c27a73 | 14492 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14493 | { |
e7c27a73 | 14494 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14495 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14496 | struct type *type, *range_type, *index_type, *char_type; |
14497 | struct attribute *attr; | |
14498 | unsigned int length; | |
14499 | ||
e142c38c | 14500 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14501 | if (attr) |
14502 | { | |
14503 | length = DW_UNSND (attr); | |
14504 | } | |
14505 | else | |
14506 | { | |
0963b4bd | 14507 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14508 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14509 | if (attr) |
14510 | { | |
14511 | length = DW_UNSND (attr); | |
14512 | } | |
14513 | else | |
14514 | { | |
14515 | length = 1; | |
14516 | } | |
c906108c | 14517 | } |
6ccb9162 | 14518 | |
46bf5051 | 14519 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14520 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14521 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14522 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14523 | |
f792889a | 14524 | return set_die_type (die, type, cu); |
c906108c SS |
14525 | } |
14526 | ||
4d804846 JB |
14527 | /* Assuming that DIE corresponds to a function, returns nonzero |
14528 | if the function is prototyped. */ | |
14529 | ||
14530 | static int | |
14531 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14532 | { | |
14533 | struct attribute *attr; | |
14534 | ||
14535 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14536 | if (attr && (DW_UNSND (attr) != 0)) | |
14537 | return 1; | |
14538 | ||
14539 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14540 | is only meaninful for C, but the concept also extends to other | |
14541 | languages that allow unprototyped functions (Eg: Objective C). | |
14542 | For all other languages, assume that functions are always | |
14543 | prototyped. */ | |
14544 | if (cu->language != language_c | |
14545 | && cu->language != language_objc | |
14546 | && cu->language != language_opencl) | |
14547 | return 1; | |
14548 | ||
14549 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14550 | prototyped and unprototyped functions; default to prototyped, | |
14551 | since that is more common in modern code (and RealView warns | |
14552 | about unprototyped functions). */ | |
14553 | if (producer_is_realview (cu->producer)) | |
14554 | return 1; | |
14555 | ||
14556 | return 0; | |
14557 | } | |
14558 | ||
c906108c SS |
14559 | /* Handle DIES due to C code like: |
14560 | ||
14561 | struct foo | |
c5aa993b JM |
14562 | { |
14563 | int (*funcp)(int a, long l); | |
14564 | int b; | |
14565 | }; | |
c906108c | 14566 | |
0963b4bd | 14567 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14568 | |
f792889a | 14569 | static struct type * |
e7c27a73 | 14570 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14571 | { |
bb5ed363 | 14572 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14573 | struct type *type; /* Type that this function returns. */ |
14574 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14575 | struct attribute *attr; |
14576 | ||
e7c27a73 | 14577 | type = die_type (die, cu); |
7e314c57 JK |
14578 | |
14579 | /* The die_type call above may have already set the type for this DIE. */ | |
14580 | ftype = get_die_type (die, cu); | |
14581 | if (ftype) | |
14582 | return ftype; | |
14583 | ||
0c8b41f1 | 14584 | ftype = lookup_function_type (type); |
c906108c | 14585 | |
4d804846 | 14586 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 14587 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 14588 | |
c055b101 CV |
14589 | /* Store the calling convention in the type if it's available in |
14590 | the subroutine die. Otherwise set the calling convention to | |
14591 | the default value DW_CC_normal. */ | |
14592 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
14593 | if (attr) |
14594 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
14595 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
14596 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
14597 | else | |
14598 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 14599 | |
743649fd MW |
14600 | /* Record whether the function returns normally to its caller or not |
14601 | if the DWARF producer set that information. */ | |
14602 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
14603 | if (attr && (DW_UNSND (attr) != 0)) | |
14604 | TYPE_NO_RETURN (ftype) = 1; | |
14605 | ||
76c10ea2 GM |
14606 | /* We need to add the subroutine type to the die immediately so |
14607 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 14608 | declared as the same subroutine type. */ |
76c10ea2 | 14609 | set_die_type (die, ftype, cu); |
6e70227d | 14610 | |
639d11d3 | 14611 | if (die->child != NULL) |
c906108c | 14612 | { |
bb5ed363 | 14613 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 14614 | struct die_info *child_die; |
8072405b | 14615 | int nparams, iparams; |
c906108c SS |
14616 | |
14617 | /* Count the number of parameters. | |
14618 | FIXME: GDB currently ignores vararg functions, but knows about | |
14619 | vararg member functions. */ | |
8072405b | 14620 | nparams = 0; |
639d11d3 | 14621 | child_die = die->child; |
c906108c SS |
14622 | while (child_die && child_die->tag) |
14623 | { | |
14624 | if (child_die->tag == DW_TAG_formal_parameter) | |
14625 | nparams++; | |
14626 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 14627 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
14628 | child_die = sibling_die (child_die); |
14629 | } | |
14630 | ||
14631 | /* Allocate storage for parameters and fill them in. */ | |
14632 | TYPE_NFIELDS (ftype) = nparams; | |
14633 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 14634 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 14635 | |
8072405b JK |
14636 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
14637 | even if we error out during the parameters reading below. */ | |
14638 | for (iparams = 0; iparams < nparams; iparams++) | |
14639 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
14640 | ||
14641 | iparams = 0; | |
639d11d3 | 14642 | child_die = die->child; |
c906108c SS |
14643 | while (child_die && child_die->tag) |
14644 | { | |
14645 | if (child_die->tag == DW_TAG_formal_parameter) | |
14646 | { | |
3ce3b1ba PA |
14647 | struct type *arg_type; |
14648 | ||
14649 | /* DWARF version 2 has no clean way to discern C++ | |
14650 | static and non-static member functions. G++ helps | |
14651 | GDB by marking the first parameter for non-static | |
14652 | member functions (which is the this pointer) as | |
14653 | artificial. We pass this information to | |
14654 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
14655 | ||
14656 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
14657 | 4.5 does not yet generate. */ | |
e142c38c | 14658 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
14659 | if (attr) |
14660 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
14661 | else | |
418835cc KS |
14662 | { |
14663 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
14664 | ||
14665 | /* GCC/43521: In java, the formal parameter | |
14666 | "this" is sometimes not marked with DW_AT_artificial. */ | |
14667 | if (cu->language == language_java) | |
14668 | { | |
14669 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 14670 | |
418835cc KS |
14671 | if (name && !strcmp (name, "this")) |
14672 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
14673 | } | |
14674 | } | |
3ce3b1ba PA |
14675 | arg_type = die_type (child_die, cu); |
14676 | ||
14677 | /* RealView does not mark THIS as const, which the testsuite | |
14678 | expects. GCC marks THIS as const in method definitions, | |
14679 | but not in the class specifications (GCC PR 43053). */ | |
14680 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
14681 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
14682 | { | |
14683 | int is_this = 0; | |
14684 | struct dwarf2_cu *arg_cu = cu; | |
14685 | const char *name = dwarf2_name (child_die, cu); | |
14686 | ||
14687 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
14688 | if (attr) | |
14689 | { | |
14690 | /* If the compiler emits this, use it. */ | |
14691 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
14692 | is_this = 1; | |
14693 | } | |
14694 | else if (name && strcmp (name, "this") == 0) | |
14695 | /* Function definitions will have the argument names. */ | |
14696 | is_this = 1; | |
14697 | else if (name == NULL && iparams == 0) | |
14698 | /* Declarations may not have the names, so like | |
14699 | elsewhere in GDB, assume an artificial first | |
14700 | argument is "this". */ | |
14701 | is_this = 1; | |
14702 | ||
14703 | if (is_this) | |
14704 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
14705 | arg_type, 0); | |
14706 | } | |
14707 | ||
14708 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
14709 | iparams++; |
14710 | } | |
14711 | child_die = sibling_die (child_die); | |
14712 | } | |
14713 | } | |
14714 | ||
76c10ea2 | 14715 | return ftype; |
c906108c SS |
14716 | } |
14717 | ||
f792889a | 14718 | static struct type * |
e7c27a73 | 14719 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14720 | { |
e7c27a73 | 14721 | struct objfile *objfile = cu->objfile; |
0114d602 | 14722 | const char *name = NULL; |
3c8e0968 | 14723 | struct type *this_type, *target_type; |
c906108c | 14724 | |
94af9270 | 14725 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 14726 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 14727 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 14728 | TYPE_NAME (this_type) = name; |
f792889a | 14729 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
14730 | target_type = die_type (die, cu); |
14731 | if (target_type != this_type) | |
14732 | TYPE_TARGET_TYPE (this_type) = target_type; | |
14733 | else | |
14734 | { | |
14735 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
14736 | spec and cause infinite loops in GDB. */ | |
14737 | complaint (&symfile_complaints, | |
14738 | _("Self-referential DW_TAG_typedef " | |
14739 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14740 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
14741 | TYPE_TARGET_TYPE (this_type) = NULL; |
14742 | } | |
f792889a | 14743 | return this_type; |
c906108c SS |
14744 | } |
14745 | ||
14746 | /* Find a representation of a given base type and install | |
14747 | it in the TYPE field of the die. */ | |
14748 | ||
f792889a | 14749 | static struct type * |
e7c27a73 | 14750 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14751 | { |
e7c27a73 | 14752 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14753 | struct type *type; |
14754 | struct attribute *attr; | |
14755 | int encoding = 0, size = 0; | |
15d034d0 | 14756 | const char *name; |
6ccb9162 UW |
14757 | enum type_code code = TYPE_CODE_INT; |
14758 | int type_flags = 0; | |
14759 | struct type *target_type = NULL; | |
c906108c | 14760 | |
e142c38c | 14761 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
14762 | if (attr) |
14763 | { | |
14764 | encoding = DW_UNSND (attr); | |
14765 | } | |
e142c38c | 14766 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14767 | if (attr) |
14768 | { | |
14769 | size = DW_UNSND (attr); | |
14770 | } | |
39cbfefa | 14771 | name = dwarf2_name (die, cu); |
6ccb9162 | 14772 | if (!name) |
c906108c | 14773 | { |
6ccb9162 UW |
14774 | complaint (&symfile_complaints, |
14775 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 14776 | } |
6ccb9162 UW |
14777 | |
14778 | switch (encoding) | |
c906108c | 14779 | { |
6ccb9162 UW |
14780 | case DW_ATE_address: |
14781 | /* Turn DW_ATE_address into a void * pointer. */ | |
14782 | code = TYPE_CODE_PTR; | |
14783 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14784 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
14785 | break; | |
14786 | case DW_ATE_boolean: | |
14787 | code = TYPE_CODE_BOOL; | |
14788 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14789 | break; | |
14790 | case DW_ATE_complex_float: | |
14791 | code = TYPE_CODE_COMPLEX; | |
14792 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
14793 | break; | |
14794 | case DW_ATE_decimal_float: | |
14795 | code = TYPE_CODE_DECFLOAT; | |
14796 | break; | |
14797 | case DW_ATE_float: | |
14798 | code = TYPE_CODE_FLT; | |
14799 | break; | |
14800 | case DW_ATE_signed: | |
14801 | break; | |
14802 | case DW_ATE_unsigned: | |
14803 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
14804 | if (cu->language == language_fortran |
14805 | && name | |
61012eef | 14806 | && startswith (name, "character(")) |
3b2b8fea | 14807 | code = TYPE_CODE_CHAR; |
6ccb9162 UW |
14808 | break; |
14809 | case DW_ATE_signed_char: | |
6e70227d | 14810 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14811 | || cu->language == language_pascal |
14812 | || cu->language == language_fortran) | |
6ccb9162 UW |
14813 | code = TYPE_CODE_CHAR; |
14814 | break; | |
14815 | case DW_ATE_unsigned_char: | |
868a0084 | 14816 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 14817 | || cu->language == language_pascal |
c44af4eb TT |
14818 | || cu->language == language_fortran |
14819 | || cu->language == language_rust) | |
6ccb9162 UW |
14820 | code = TYPE_CODE_CHAR; |
14821 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14822 | break; | |
75079b2b TT |
14823 | case DW_ATE_UTF: |
14824 | /* We just treat this as an integer and then recognize the | |
14825 | type by name elsewhere. */ | |
14826 | break; | |
14827 | ||
6ccb9162 UW |
14828 | default: |
14829 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
14830 | dwarf_type_encoding_name (encoding)); | |
14831 | break; | |
c906108c | 14832 | } |
6ccb9162 | 14833 | |
0114d602 DJ |
14834 | type = init_type (code, size, type_flags, NULL, objfile); |
14835 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
14836 | TYPE_TARGET_TYPE (type) = target_type; |
14837 | ||
0114d602 | 14838 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 14839 | TYPE_NOSIGN (type) = 1; |
0114d602 | 14840 | |
f792889a | 14841 | return set_die_type (die, type, cu); |
c906108c SS |
14842 | } |
14843 | ||
80180f79 SA |
14844 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
14845 | resulting value of the attribute into struct bound_prop. | |
14846 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
14847 | ||
14848 | static int | |
14849 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
14850 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
14851 | { | |
14852 | struct dwarf2_property_baton *baton; | |
14853 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
14854 | ||
14855 | if (attr == NULL || prop == NULL) | |
14856 | return 0; | |
14857 | ||
14858 | if (attr_form_is_block (attr)) | |
14859 | { | |
8d749320 | 14860 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
14861 | baton->referenced_type = NULL; |
14862 | baton->locexpr.per_cu = cu->per_cu; | |
14863 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
14864 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
14865 | prop->data.baton = baton; | |
14866 | prop->kind = PROP_LOCEXPR; | |
14867 | gdb_assert (prop->data.baton != NULL); | |
14868 | } | |
14869 | else if (attr_form_is_ref (attr)) | |
14870 | { | |
14871 | struct dwarf2_cu *target_cu = cu; | |
14872 | struct die_info *target_die; | |
14873 | struct attribute *target_attr; | |
14874 | ||
14875 | target_die = follow_die_ref (die, attr, &target_cu); | |
14876 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
14877 | if (target_attr == NULL) |
14878 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
14879 | target_cu); | |
80180f79 SA |
14880 | if (target_attr == NULL) |
14881 | return 0; | |
14882 | ||
df25ebbd | 14883 | switch (target_attr->name) |
80180f79 | 14884 | { |
df25ebbd JB |
14885 | case DW_AT_location: |
14886 | if (attr_form_is_section_offset (target_attr)) | |
14887 | { | |
8d749320 | 14888 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
14889 | baton->referenced_type = die_type (target_die, target_cu); |
14890 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
14891 | prop->data.baton = baton; | |
14892 | prop->kind = PROP_LOCLIST; | |
14893 | gdb_assert (prop->data.baton != NULL); | |
14894 | } | |
14895 | else if (attr_form_is_block (target_attr)) | |
14896 | { | |
8d749320 | 14897 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
14898 | baton->referenced_type = die_type (target_die, target_cu); |
14899 | baton->locexpr.per_cu = cu->per_cu; | |
14900 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
14901 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
14902 | prop->data.baton = baton; | |
14903 | prop->kind = PROP_LOCEXPR; | |
14904 | gdb_assert (prop->data.baton != NULL); | |
14905 | } | |
14906 | else | |
14907 | { | |
14908 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14909 | "dynamic property"); | |
14910 | return 0; | |
14911 | } | |
14912 | break; | |
14913 | case DW_AT_data_member_location: | |
14914 | { | |
14915 | LONGEST offset; | |
14916 | ||
14917 | if (!handle_data_member_location (target_die, target_cu, | |
14918 | &offset)) | |
14919 | return 0; | |
14920 | ||
8d749320 | 14921 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
14922 | baton->referenced_type = read_type_die (target_die->parent, |
14923 | target_cu); | |
df25ebbd JB |
14924 | baton->offset_info.offset = offset; |
14925 | baton->offset_info.type = die_type (target_die, target_cu); | |
14926 | prop->data.baton = baton; | |
14927 | prop->kind = PROP_ADDR_OFFSET; | |
14928 | break; | |
14929 | } | |
80180f79 SA |
14930 | } |
14931 | } | |
14932 | else if (attr_form_is_constant (attr)) | |
14933 | { | |
14934 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
14935 | prop->kind = PROP_CONST; | |
14936 | } | |
14937 | else | |
14938 | { | |
14939 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
14940 | dwarf2_name (die, cu)); | |
14941 | return 0; | |
14942 | } | |
14943 | ||
14944 | return 1; | |
14945 | } | |
14946 | ||
a02abb62 JB |
14947 | /* Read the given DW_AT_subrange DIE. */ |
14948 | ||
f792889a | 14949 | static struct type * |
a02abb62 JB |
14950 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
14951 | { | |
4c9ad8c2 | 14952 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
14953 | struct type *range_type; |
14954 | struct attribute *attr; | |
729efb13 | 14955 | struct dynamic_prop low, high; |
4fae6e18 | 14956 | int low_default_is_valid; |
c451ebe5 | 14957 | int high_bound_is_count = 0; |
15d034d0 | 14958 | const char *name; |
43bbcdc2 | 14959 | LONGEST negative_mask; |
e77813c8 | 14960 | |
4c9ad8c2 TT |
14961 | orig_base_type = die_type (die, cu); |
14962 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
14963 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
14964 | creating the range type, but we use the result of check_typedef | |
14965 | when examining properties of the type. */ | |
14966 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 14967 | |
7e314c57 JK |
14968 | /* The die_type call above may have already set the type for this DIE. */ |
14969 | range_type = get_die_type (die, cu); | |
14970 | if (range_type) | |
14971 | return range_type; | |
14972 | ||
729efb13 SA |
14973 | low.kind = PROP_CONST; |
14974 | high.kind = PROP_CONST; | |
14975 | high.data.const_val = 0; | |
14976 | ||
4fae6e18 JK |
14977 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
14978 | omitting DW_AT_lower_bound. */ | |
14979 | switch (cu->language) | |
6e70227d | 14980 | { |
4fae6e18 JK |
14981 | case language_c: |
14982 | case language_cplus: | |
729efb13 | 14983 | low.data.const_val = 0; |
4fae6e18 JK |
14984 | low_default_is_valid = 1; |
14985 | break; | |
14986 | case language_fortran: | |
729efb13 | 14987 | low.data.const_val = 1; |
4fae6e18 JK |
14988 | low_default_is_valid = 1; |
14989 | break; | |
14990 | case language_d: | |
14991 | case language_java: | |
14992 | case language_objc: | |
c44af4eb | 14993 | case language_rust: |
729efb13 | 14994 | low.data.const_val = 0; |
4fae6e18 JK |
14995 | low_default_is_valid = (cu->header.version >= 4); |
14996 | break; | |
14997 | case language_ada: | |
14998 | case language_m2: | |
14999 | case language_pascal: | |
729efb13 | 15000 | low.data.const_val = 1; |
4fae6e18 JK |
15001 | low_default_is_valid = (cu->header.version >= 4); |
15002 | break; | |
15003 | default: | |
729efb13 | 15004 | low.data.const_val = 0; |
4fae6e18 JK |
15005 | low_default_is_valid = 0; |
15006 | break; | |
a02abb62 JB |
15007 | } |
15008 | ||
e142c38c | 15009 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 15010 | if (attr) |
11c1ba78 | 15011 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
15012 | else if (!low_default_is_valid) |
15013 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
15014 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15015 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 15016 | |
e142c38c | 15017 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 15018 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
15019 | { |
15020 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 15021 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 15022 | { |
c451ebe5 SA |
15023 | /* If bounds are constant do the final calculation here. */ |
15024 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
15025 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
15026 | else | |
15027 | high_bound_is_count = 1; | |
c2ff108b | 15028 | } |
e77813c8 PM |
15029 | } |
15030 | ||
15031 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
15032 | without specifying a base type. | |
15033 | In that case, the base type must be set to the type of | |
15034 | the lower bound, upper bound or count, in that order, if any of these | |
15035 | three attributes references an object that has a type. | |
15036 | If no base type is found, the Dwarf-2 specifications say that | |
15037 | a signed integer type of size equal to the size of an address should | |
15038 | be used. | |
15039 | For the following C code: `extern char gdb_int [];' | |
15040 | GCC produces an empty range DIE. | |
15041 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 15042 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
15043 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
15044 | { | |
15045 | struct objfile *objfile = cu->objfile; | |
15046 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15047 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
15048 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
15049 | ||
15050 | /* Test "int", "long int", and "long long int" objfile types, | |
15051 | and select the first one having a size above or equal to the | |
15052 | architecture address size. */ | |
15053 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15054 | base_type = int_type; | |
15055 | else | |
15056 | { | |
15057 | int_type = objfile_type (objfile)->builtin_long; | |
15058 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15059 | base_type = int_type; | |
15060 | else | |
15061 | { | |
15062 | int_type = objfile_type (objfile)->builtin_long_long; | |
15063 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15064 | base_type = int_type; | |
15065 | } | |
15066 | } | |
15067 | } | |
a02abb62 | 15068 | |
dbb9c2b1 JB |
15069 | /* Normally, the DWARF producers are expected to use a signed |
15070 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
15071 | But this is unfortunately not always the case, as witnessed | |
15072 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
15073 | is used instead. To work around that ambiguity, we treat | |
15074 | the bounds as signed, and thus sign-extend their values, when | |
15075 | the base type is signed. */ | |
6e70227d | 15076 | negative_mask = |
66c6502d | 15077 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
15078 | if (low.kind == PROP_CONST |
15079 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
15080 | low.data.const_val |= negative_mask; | |
15081 | if (high.kind == PROP_CONST | |
15082 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
15083 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 15084 | |
729efb13 | 15085 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 15086 | |
c451ebe5 SA |
15087 | if (high_bound_is_count) |
15088 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
15089 | ||
c2ff108b JK |
15090 | /* Ada expects an empty array on no boundary attributes. */ |
15091 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 15092 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 15093 | |
39cbfefa DJ |
15094 | name = dwarf2_name (die, cu); |
15095 | if (name) | |
15096 | TYPE_NAME (range_type) = name; | |
6e70227d | 15097 | |
e142c38c | 15098 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
15099 | if (attr) |
15100 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
15101 | ||
7e314c57 JK |
15102 | set_die_type (die, range_type, cu); |
15103 | ||
15104 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15105 | set_descriptive_type (range_type, die, cu); |
15106 | ||
7e314c57 | 15107 | return range_type; |
a02abb62 | 15108 | } |
6e70227d | 15109 | |
f792889a | 15110 | static struct type * |
81a17f79 JB |
15111 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
15112 | { | |
15113 | struct type *type; | |
81a17f79 | 15114 | |
81a17f79 JB |
15115 | /* For now, we only support the C meaning of an unspecified type: void. */ |
15116 | ||
0114d602 DJ |
15117 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
15118 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 15119 | |
f792889a | 15120 | return set_die_type (die, type, cu); |
81a17f79 | 15121 | } |
a02abb62 | 15122 | |
639d11d3 DC |
15123 | /* Read a single die and all its descendents. Set the die's sibling |
15124 | field to NULL; set other fields in the die correctly, and set all | |
15125 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
15126 | location of the info_ptr after reading all of those dies. PARENT | |
15127 | is the parent of the die in question. */ | |
15128 | ||
15129 | static struct die_info * | |
dee91e82 | 15130 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
15131 | const gdb_byte *info_ptr, |
15132 | const gdb_byte **new_info_ptr, | |
dee91e82 | 15133 | struct die_info *parent) |
639d11d3 DC |
15134 | { |
15135 | struct die_info *die; | |
d521ce57 | 15136 | const gdb_byte *cur_ptr; |
639d11d3 DC |
15137 | int has_children; |
15138 | ||
bf6af496 | 15139 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
15140 | if (die == NULL) |
15141 | { | |
15142 | *new_info_ptr = cur_ptr; | |
15143 | return NULL; | |
15144 | } | |
93311388 | 15145 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
15146 | |
15147 | if (has_children) | |
bf6af496 | 15148 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
15149 | else |
15150 | { | |
15151 | die->child = NULL; | |
15152 | *new_info_ptr = cur_ptr; | |
15153 | } | |
15154 | ||
15155 | die->sibling = NULL; | |
15156 | die->parent = parent; | |
15157 | return die; | |
15158 | } | |
15159 | ||
15160 | /* Read a die, all of its descendents, and all of its siblings; set | |
15161 | all of the fields of all of the dies correctly. Arguments are as | |
15162 | in read_die_and_children. */ | |
15163 | ||
15164 | static struct die_info * | |
bf6af496 | 15165 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
15166 | const gdb_byte *info_ptr, |
15167 | const gdb_byte **new_info_ptr, | |
bf6af496 | 15168 | struct die_info *parent) |
639d11d3 DC |
15169 | { |
15170 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 15171 | const gdb_byte *cur_ptr; |
639d11d3 | 15172 | |
c906108c | 15173 | cur_ptr = info_ptr; |
639d11d3 DC |
15174 | first_die = last_sibling = NULL; |
15175 | ||
15176 | while (1) | |
c906108c | 15177 | { |
639d11d3 | 15178 | struct die_info *die |
dee91e82 | 15179 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 15180 | |
1d325ec1 | 15181 | if (die == NULL) |
c906108c | 15182 | { |
639d11d3 DC |
15183 | *new_info_ptr = cur_ptr; |
15184 | return first_die; | |
c906108c | 15185 | } |
1d325ec1 DJ |
15186 | |
15187 | if (!first_die) | |
15188 | first_die = die; | |
c906108c | 15189 | else |
1d325ec1 DJ |
15190 | last_sibling->sibling = die; |
15191 | ||
15192 | last_sibling = die; | |
c906108c | 15193 | } |
c906108c SS |
15194 | } |
15195 | ||
bf6af496 DE |
15196 | /* Read a die, all of its descendents, and all of its siblings; set |
15197 | all of the fields of all of the dies correctly. Arguments are as | |
15198 | in read_die_and_children. | |
15199 | This the main entry point for reading a DIE and all its children. */ | |
15200 | ||
15201 | static struct die_info * | |
15202 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
15203 | const gdb_byte *info_ptr, |
15204 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
15205 | struct die_info *parent) |
15206 | { | |
15207 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
15208 | new_info_ptr, parent); | |
15209 | ||
b4f54984 | 15210 | if (dwarf_die_debug) |
bf6af496 DE |
15211 | { |
15212 | fprintf_unfiltered (gdb_stdlog, | |
15213 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15214 | get_section_name (reader->die_section), |
bf6af496 DE |
15215 | (unsigned) (info_ptr - reader->die_section->buffer), |
15216 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15217 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
15218 | } |
15219 | ||
15220 | return die; | |
15221 | } | |
15222 | ||
3019eac3 DE |
15223 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
15224 | attributes. | |
15225 | The caller is responsible for filling in the extra attributes | |
15226 | and updating (*DIEP)->num_attrs. | |
15227 | Set DIEP to point to a newly allocated die with its information, | |
15228 | except for its child, sibling, and parent fields. | |
15229 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 15230 | |
d521ce57 | 15231 | static const gdb_byte * |
3019eac3 | 15232 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 15233 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 15234 | int *has_children, int num_extra_attrs) |
93311388 | 15235 | { |
b64f50a1 JK |
15236 | unsigned int abbrev_number, bytes_read, i; |
15237 | sect_offset offset; | |
93311388 DE |
15238 | struct abbrev_info *abbrev; |
15239 | struct die_info *die; | |
15240 | struct dwarf2_cu *cu = reader->cu; | |
15241 | bfd *abfd = reader->abfd; | |
15242 | ||
b64f50a1 | 15243 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
15244 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15245 | info_ptr += bytes_read; | |
15246 | if (!abbrev_number) | |
15247 | { | |
15248 | *diep = NULL; | |
15249 | *has_children = 0; | |
15250 | return info_ptr; | |
15251 | } | |
15252 | ||
433df2d4 | 15253 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 15254 | if (!abbrev) |
348e048f DE |
15255 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
15256 | abbrev_number, | |
15257 | bfd_get_filename (abfd)); | |
15258 | ||
3019eac3 | 15259 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
15260 | die->offset = offset; |
15261 | die->tag = abbrev->tag; | |
15262 | die->abbrev = abbrev_number; | |
15263 | ||
3019eac3 DE |
15264 | /* Make the result usable. |
15265 | The caller needs to update num_attrs after adding the extra | |
15266 | attributes. */ | |
93311388 DE |
15267 | die->num_attrs = abbrev->num_attrs; |
15268 | ||
15269 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
15270 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
15271 | info_ptr); | |
93311388 DE |
15272 | |
15273 | *diep = die; | |
15274 | *has_children = abbrev->has_children; | |
15275 | return info_ptr; | |
15276 | } | |
15277 | ||
3019eac3 DE |
15278 | /* Read a die and all its attributes. |
15279 | Set DIEP to point to a newly allocated die with its information, | |
15280 | except for its child, sibling, and parent fields. | |
15281 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
15282 | ||
d521ce57 | 15283 | static const gdb_byte * |
3019eac3 | 15284 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 15285 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
15286 | int *has_children) |
15287 | { | |
d521ce57 | 15288 | const gdb_byte *result; |
bf6af496 DE |
15289 | |
15290 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
15291 | ||
b4f54984 | 15292 | if (dwarf_die_debug) |
bf6af496 DE |
15293 | { |
15294 | fprintf_unfiltered (gdb_stdlog, | |
15295 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15296 | get_section_name (reader->die_section), |
bf6af496 DE |
15297 | (unsigned) (info_ptr - reader->die_section->buffer), |
15298 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15299 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
15300 | } |
15301 | ||
15302 | return result; | |
3019eac3 | 15303 | } |
433df2d4 DE |
15304 | \f |
15305 | /* Abbreviation tables. | |
3019eac3 | 15306 | |
433df2d4 | 15307 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
15308 | stored in a separate .debug_abbrev section. Before we read any |
15309 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
15310 | in a hash table. */ |
15311 | ||
15312 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
15313 | ||
15314 | static struct abbrev_info * | |
15315 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
15316 | { | |
15317 | struct abbrev_info *abbrev; | |
15318 | ||
8d749320 | 15319 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 15320 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 15321 | |
433df2d4 DE |
15322 | return abbrev; |
15323 | } | |
15324 | ||
15325 | /* Add an abbreviation to the table. */ | |
c906108c SS |
15326 | |
15327 | static void | |
433df2d4 DE |
15328 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15329 | unsigned int abbrev_number, | |
15330 | struct abbrev_info *abbrev) | |
15331 | { | |
15332 | unsigned int hash_number; | |
15333 | ||
15334 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15335 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15336 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15337 | } | |
dee91e82 | 15338 | |
433df2d4 DE |
15339 | /* Look up an abbrev in the table. |
15340 | Returns NULL if the abbrev is not found. */ | |
15341 | ||
15342 | static struct abbrev_info * | |
15343 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15344 | unsigned int abbrev_number) | |
c906108c | 15345 | { |
433df2d4 DE |
15346 | unsigned int hash_number; |
15347 | struct abbrev_info *abbrev; | |
15348 | ||
15349 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15350 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15351 | ||
15352 | while (abbrev) | |
15353 | { | |
15354 | if (abbrev->number == abbrev_number) | |
15355 | return abbrev; | |
15356 | abbrev = abbrev->next; | |
15357 | } | |
15358 | return NULL; | |
15359 | } | |
15360 | ||
15361 | /* Read in an abbrev table. */ | |
15362 | ||
15363 | static struct abbrev_table * | |
15364 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
15365 | sect_offset offset) | |
15366 | { | |
15367 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15368 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15369 | struct abbrev_table *abbrev_table; |
d521ce57 | 15370 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15371 | struct abbrev_info *cur_abbrev; |
15372 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15373 | unsigned int abbrev_form; |
f3dd6933 DJ |
15374 | struct attr_abbrev *cur_attrs; |
15375 | unsigned int allocated_attrs; | |
c906108c | 15376 | |
70ba0933 | 15377 | abbrev_table = XNEW (struct abbrev_table); |
f4dc4d17 | 15378 | abbrev_table->offset = offset; |
433df2d4 | 15379 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
15380 | abbrev_table->abbrevs = |
15381 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
15382 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
15383 | memset (abbrev_table->abbrevs, 0, |
15384 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15385 | |
433df2d4 DE |
15386 | dwarf2_read_section (objfile, section); |
15387 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
15388 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15389 | abbrev_ptr += bytes_read; | |
15390 | ||
f3dd6933 | 15391 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 15392 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 15393 | |
0963b4bd | 15394 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15395 | while (abbrev_number) |
15396 | { | |
433df2d4 | 15397 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15398 | |
15399 | /* read in abbrev header */ | |
15400 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
15401 | cur_abbrev->tag |
15402 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
15403 | abbrev_ptr += bytes_read; |
15404 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15405 | abbrev_ptr += 1; | |
15406 | ||
15407 | /* now read in declarations */ | |
15408 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15409 | abbrev_ptr += bytes_read; | |
15410 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15411 | abbrev_ptr += bytes_read; | |
15412 | while (abbrev_name) | |
15413 | { | |
f3dd6933 | 15414 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15415 | { |
f3dd6933 DJ |
15416 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15417 | cur_attrs | |
224c3ddb | 15418 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 15419 | } |
ae038cb0 | 15420 | |
aead7601 SM |
15421 | cur_attrs[cur_abbrev->num_attrs].name |
15422 | = (enum dwarf_attribute) abbrev_name; | |
15423 | cur_attrs[cur_abbrev->num_attrs++].form | |
15424 | = (enum dwarf_form) abbrev_form; | |
c906108c SS |
15425 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15426 | abbrev_ptr += bytes_read; | |
15427 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15428 | abbrev_ptr += bytes_read; | |
15429 | } | |
15430 | ||
8d749320 SM |
15431 | cur_abbrev->attrs = |
15432 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
15433 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
15434 | memcpy (cur_abbrev->attrs, cur_attrs, |
15435 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15436 | ||
433df2d4 | 15437 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15438 | |
15439 | /* Get next abbreviation. | |
15440 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15441 | always properly terminated with an abbrev number of 0. |
15442 | Exit loop if we encounter an abbreviation which we have | |
15443 | already read (which means we are about to read the abbreviations | |
15444 | for the next compile unit) or if the end of the abbreviation | |
15445 | table is reached. */ | |
433df2d4 | 15446 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15447 | break; |
15448 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15449 | abbrev_ptr += bytes_read; | |
433df2d4 | 15450 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15451 | break; |
15452 | } | |
f3dd6933 DJ |
15453 | |
15454 | xfree (cur_attrs); | |
433df2d4 | 15455 | return abbrev_table; |
c906108c SS |
15456 | } |
15457 | ||
433df2d4 | 15458 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15459 | |
c906108c | 15460 | static void |
433df2d4 | 15461 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15462 | { |
433df2d4 DE |
15463 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15464 | xfree (abbrev_table); | |
c906108c SS |
15465 | } |
15466 | ||
f4dc4d17 DE |
15467 | /* Same as abbrev_table_free but as a cleanup. |
15468 | We pass in a pointer to the pointer to the table so that we can | |
15469 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15470 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15471 | |
15472 | static void | |
15473 | abbrev_table_free_cleanup (void *table_ptr) | |
15474 | { | |
9a3c8263 | 15475 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
15476 | |
15477 | if (*abbrev_table_ptr != NULL) | |
15478 | abbrev_table_free (*abbrev_table_ptr); | |
15479 | *abbrev_table_ptr = NULL; | |
15480 | } | |
15481 | ||
433df2d4 DE |
15482 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15483 | ||
15484 | static void | |
15485 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15486 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15487 | { |
433df2d4 DE |
15488 | cu->abbrev_table = |
15489 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
15490 | } | |
c906108c | 15491 | |
433df2d4 | 15492 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15493 | |
433df2d4 DE |
15494 | static void |
15495 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15496 | { | |
9a3c8263 | 15497 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 15498 | |
a2ce51a0 DE |
15499 | if (cu->abbrev_table != NULL) |
15500 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15501 | /* Set this to NULL so that we SEGV if we try to read it later, |
15502 | and also because free_comp_unit verifies this is NULL. */ | |
15503 | cu->abbrev_table = NULL; | |
15504 | } | |
15505 | \f | |
72bf9492 DJ |
15506 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15507 | symbol for. */ | |
15508 | ||
15509 | static int | |
15510 | is_type_tag_for_partial (int tag) | |
15511 | { | |
15512 | switch (tag) | |
15513 | { | |
15514 | #if 0 | |
15515 | /* Some types that would be reasonable to generate partial symbols for, | |
15516 | that we don't at present. */ | |
15517 | case DW_TAG_array_type: | |
15518 | case DW_TAG_file_type: | |
15519 | case DW_TAG_ptr_to_member_type: | |
15520 | case DW_TAG_set_type: | |
15521 | case DW_TAG_string_type: | |
15522 | case DW_TAG_subroutine_type: | |
15523 | #endif | |
15524 | case DW_TAG_base_type: | |
15525 | case DW_TAG_class_type: | |
680b30c7 | 15526 | case DW_TAG_interface_type: |
72bf9492 DJ |
15527 | case DW_TAG_enumeration_type: |
15528 | case DW_TAG_structure_type: | |
15529 | case DW_TAG_subrange_type: | |
15530 | case DW_TAG_typedef: | |
15531 | case DW_TAG_union_type: | |
15532 | return 1; | |
15533 | default: | |
15534 | return 0; | |
15535 | } | |
15536 | } | |
15537 | ||
15538 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15539 | ||
15540 | static struct partial_die_info * | |
dee91e82 | 15541 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15542 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15543 | { |
dee91e82 | 15544 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15545 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15546 | struct partial_die_info *part_die; |
15547 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15548 | struct abbrev_info *abbrev; | |
15549 | unsigned int bytes_read; | |
5afb4e99 | 15550 | unsigned int load_all = 0; |
72bf9492 DJ |
15551 | int nesting_level = 1; |
15552 | ||
15553 | parent_die = NULL; | |
15554 | last_die = NULL; | |
15555 | ||
7adf1e79 DE |
15556 | gdb_assert (cu->per_cu != NULL); |
15557 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
15558 | load_all = 1; |
15559 | ||
72bf9492 DJ |
15560 | cu->partial_dies |
15561 | = htab_create_alloc_ex (cu->header.length / 12, | |
15562 | partial_die_hash, | |
15563 | partial_die_eq, | |
15564 | NULL, | |
15565 | &cu->comp_unit_obstack, | |
15566 | hashtab_obstack_allocate, | |
15567 | dummy_obstack_deallocate); | |
15568 | ||
8d749320 | 15569 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
15570 | |
15571 | while (1) | |
15572 | { | |
15573 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
15574 | ||
15575 | /* A NULL abbrev means the end of a series of children. */ | |
15576 | if (abbrev == NULL) | |
15577 | { | |
15578 | if (--nesting_level == 0) | |
15579 | { | |
15580 | /* PART_DIE was probably the last thing allocated on the | |
15581 | comp_unit_obstack, so we could call obstack_free | |
15582 | here. We don't do that because the waste is small, | |
15583 | and will be cleaned up when we're done with this | |
15584 | compilation unit. This way, we're also more robust | |
15585 | against other users of the comp_unit_obstack. */ | |
15586 | return first_die; | |
15587 | } | |
15588 | info_ptr += bytes_read; | |
15589 | last_die = parent_die; | |
15590 | parent_die = parent_die->die_parent; | |
15591 | continue; | |
15592 | } | |
15593 | ||
98bfdba5 PA |
15594 | /* Check for template arguments. We never save these; if |
15595 | they're seen, we just mark the parent, and go on our way. */ | |
15596 | if (parent_die != NULL | |
15597 | && cu->language == language_cplus | |
15598 | && (abbrev->tag == DW_TAG_template_type_param | |
15599 | || abbrev->tag == DW_TAG_template_value_param)) | |
15600 | { | |
15601 | parent_die->has_template_arguments = 1; | |
15602 | ||
15603 | if (!load_all) | |
15604 | { | |
15605 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 15606 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15607 | continue; |
15608 | } | |
15609 | } | |
15610 | ||
0d99eb77 | 15611 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
15612 | Skip their other children. */ |
15613 | if (!load_all | |
15614 | && cu->language == language_cplus | |
15615 | && parent_die != NULL | |
15616 | && parent_die->tag == DW_TAG_subprogram) | |
15617 | { | |
dee91e82 | 15618 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15619 | continue; |
15620 | } | |
15621 | ||
5afb4e99 DJ |
15622 | /* Check whether this DIE is interesting enough to save. Normally |
15623 | we would not be interested in members here, but there may be | |
15624 | later variables referencing them via DW_AT_specification (for | |
15625 | static members). */ | |
15626 | if (!load_all | |
15627 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 15628 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
15629 | && abbrev->tag != DW_TAG_enumerator |
15630 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 15631 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 15632 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 15633 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 15634 | && abbrev->tag != DW_TAG_module |
95554aad | 15635 | && abbrev->tag != DW_TAG_member |
74921315 KS |
15636 | && abbrev->tag != DW_TAG_imported_unit |
15637 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
15638 | { |
15639 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15640 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
15641 | continue; |
15642 | } | |
15643 | ||
dee91e82 DE |
15644 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
15645 | info_ptr); | |
72bf9492 DJ |
15646 | |
15647 | /* This two-pass algorithm for processing partial symbols has a | |
15648 | high cost in cache pressure. Thus, handle some simple cases | |
15649 | here which cover the majority of C partial symbols. DIEs | |
15650 | which neither have specification tags in them, nor could have | |
15651 | specification tags elsewhere pointing at them, can simply be | |
15652 | processed and discarded. | |
15653 | ||
15654 | This segment is also optional; scan_partial_symbols and | |
15655 | add_partial_symbol will handle these DIEs if we chain | |
15656 | them in normally. When compilers which do not emit large | |
15657 | quantities of duplicate debug information are more common, | |
15658 | this code can probably be removed. */ | |
15659 | ||
15660 | /* Any complete simple types at the top level (pretty much all | |
15661 | of them, for a language without namespaces), can be processed | |
15662 | directly. */ | |
15663 | if (parent_die == NULL | |
15664 | && part_die->has_specification == 0 | |
15665 | && part_die->is_declaration == 0 | |
d8228535 | 15666 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
15667 | || part_die->tag == DW_TAG_base_type |
15668 | || part_die->tag == DW_TAG_subrange_type)) | |
15669 | { | |
15670 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 15671 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15672 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 15673 | &objfile->static_psymbols, |
1762568f | 15674 | 0, cu->language, objfile); |
dee91e82 | 15675 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15676 | continue; |
15677 | } | |
15678 | ||
d8228535 JK |
15679 | /* The exception for DW_TAG_typedef with has_children above is |
15680 | a workaround of GCC PR debug/47510. In the case of this complaint | |
15681 | type_name_no_tag_or_error will error on such types later. | |
15682 | ||
15683 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
15684 | it could not find the child DIEs referenced later, this is checked | |
15685 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
15686 | ||
15687 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
15688 | complaint (&symfile_complaints, | |
15689 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
15690 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15691 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 15692 | |
72bf9492 DJ |
15693 | /* If we're at the second level, and we're an enumerator, and |
15694 | our parent has no specification (meaning possibly lives in a | |
15695 | namespace elsewhere), then we can add the partial symbol now | |
15696 | instead of queueing it. */ | |
15697 | if (part_die->tag == DW_TAG_enumerator | |
15698 | && parent_die != NULL | |
15699 | && parent_die->die_parent == NULL | |
15700 | && parent_die->tag == DW_TAG_enumeration_type | |
15701 | && parent_die->has_specification == 0) | |
15702 | { | |
15703 | if (part_die->name == NULL) | |
3e43a32a MS |
15704 | complaint (&symfile_complaints, |
15705 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 15706 | else if (building_psymtab) |
04a679b8 | 15707 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15708 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
15709 | (cu->language == language_cplus |
15710 | || cu->language == language_java) | |
bb5ed363 DE |
15711 | ? &objfile->global_psymbols |
15712 | : &objfile->static_psymbols, | |
1762568f | 15713 | 0, cu->language, objfile); |
72bf9492 | 15714 | |
dee91e82 | 15715 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15716 | continue; |
15717 | } | |
15718 | ||
15719 | /* We'll save this DIE so link it in. */ | |
15720 | part_die->die_parent = parent_die; | |
15721 | part_die->die_sibling = NULL; | |
15722 | part_die->die_child = NULL; | |
15723 | ||
15724 | if (last_die && last_die == parent_die) | |
15725 | last_die->die_child = part_die; | |
15726 | else if (last_die) | |
15727 | last_die->die_sibling = part_die; | |
15728 | ||
15729 | last_die = part_die; | |
15730 | ||
15731 | if (first_die == NULL) | |
15732 | first_die = part_die; | |
15733 | ||
15734 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
15735 | find interesting need to be in the hash table, because we | |
15736 | also have the parent/sibling/child chains; only those that we | |
15737 | might refer to by offset later during partial symbol reading. | |
15738 | ||
15739 | For now this means things that might have be the target of a | |
15740 | DW_AT_specification, DW_AT_abstract_origin, or | |
15741 | DW_AT_extension. DW_AT_extension will refer only to | |
15742 | namespaces; DW_AT_abstract_origin refers to functions (and | |
15743 | many things under the function DIE, but we do not recurse | |
15744 | into function DIEs during partial symbol reading) and | |
15745 | possibly variables as well; DW_AT_specification refers to | |
15746 | declarations. Declarations ought to have the DW_AT_declaration | |
15747 | flag. It happens that GCC forgets to put it in sometimes, but | |
15748 | only for functions, not for types. | |
15749 | ||
15750 | Adding more things than necessary to the hash table is harmless | |
15751 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
15752 | wasted time in find_partial_die, when we reread the compilation |
15753 | unit with load_all_dies set. */ | |
72bf9492 | 15754 | |
5afb4e99 | 15755 | if (load_all |
72929c62 | 15756 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 15757 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
15758 | || abbrev->tag == DW_TAG_variable |
15759 | || abbrev->tag == DW_TAG_namespace | |
15760 | || part_die->is_declaration) | |
15761 | { | |
15762 | void **slot; | |
15763 | ||
15764 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 15765 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
15766 | *slot = part_die; |
15767 | } | |
15768 | ||
8d749320 | 15769 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
15770 | |
15771 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 15772 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
15773 | languages we have to, so that we can get at method physnames |
15774 | to infer fully qualified class names, for DW_AT_specification, | |
15775 | and for C++ template arguments. For C++, we also look one level | |
15776 | inside functions to find template arguments (if the name of the | |
15777 | function does not already contain the template arguments). | |
bc30ff58 JB |
15778 | |
15779 | For Ada, we need to scan the children of subprograms and lexical | |
15780 | blocks as well because Ada allows the definition of nested | |
15781 | entities that could be interesting for the debugger, such as | |
15782 | nested subprograms for instance. */ | |
72bf9492 | 15783 | if (last_die->has_children |
5afb4e99 DJ |
15784 | && (load_all |
15785 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 15786 | || last_die->tag == DW_TAG_module |
72bf9492 | 15787 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
15788 | || (cu->language == language_cplus |
15789 | && last_die->tag == DW_TAG_subprogram | |
15790 | && (last_die->name == NULL | |
15791 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
15792 | || (cu->language != language_c |
15793 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 15794 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 15795 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
15796 | || last_die->tag == DW_TAG_union_type)) |
15797 | || (cu->language == language_ada | |
15798 | && (last_die->tag == DW_TAG_subprogram | |
15799 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
15800 | { |
15801 | nesting_level++; | |
15802 | parent_die = last_die; | |
15803 | continue; | |
15804 | } | |
15805 | ||
15806 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15807 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
15808 | |
15809 | /* Back to the top, do it again. */ | |
15810 | } | |
15811 | } | |
15812 | ||
c906108c SS |
15813 | /* Read a minimal amount of information into the minimal die structure. */ |
15814 | ||
d521ce57 | 15815 | static const gdb_byte * |
dee91e82 DE |
15816 | read_partial_die (const struct die_reader_specs *reader, |
15817 | struct partial_die_info *part_die, | |
15818 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 15819 | const gdb_byte *info_ptr) |
c906108c | 15820 | { |
dee91e82 | 15821 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15822 | struct objfile *objfile = cu->objfile; |
d521ce57 | 15823 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 15824 | unsigned int i; |
c906108c | 15825 | struct attribute attr; |
c5aa993b | 15826 | int has_low_pc_attr = 0; |
c906108c | 15827 | int has_high_pc_attr = 0; |
91da1414 | 15828 | int high_pc_relative = 0; |
c906108c | 15829 | |
72bf9492 | 15830 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 15831 | |
b64f50a1 | 15832 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
15833 | |
15834 | info_ptr += abbrev_len; | |
15835 | ||
15836 | if (abbrev == NULL) | |
15837 | return info_ptr; | |
15838 | ||
c906108c SS |
15839 | part_die->tag = abbrev->tag; |
15840 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
15841 | |
15842 | for (i = 0; i < abbrev->num_attrs; ++i) | |
15843 | { | |
dee91e82 | 15844 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
15845 | |
15846 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 15847 | partial symbol table. */ |
c906108c SS |
15848 | switch (attr.name) |
15849 | { | |
15850 | case DW_AT_name: | |
71c25dea TT |
15851 | switch (part_die->tag) |
15852 | { | |
15853 | case DW_TAG_compile_unit: | |
95554aad | 15854 | case DW_TAG_partial_unit: |
348e048f | 15855 | case DW_TAG_type_unit: |
71c25dea TT |
15856 | /* Compilation units have a DW_AT_name that is a filename, not |
15857 | a source language identifier. */ | |
15858 | case DW_TAG_enumeration_type: | |
15859 | case DW_TAG_enumerator: | |
15860 | /* These tags always have simple identifiers already; no need | |
15861 | to canonicalize them. */ | |
15862 | part_die->name = DW_STRING (&attr); | |
15863 | break; | |
15864 | default: | |
15865 | part_die->name | |
15866 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 15867 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
15868 | break; |
15869 | } | |
c906108c | 15870 | break; |
31ef98ae | 15871 | case DW_AT_linkage_name: |
c906108c | 15872 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
15873 | /* Note that both forms of linkage name might appear. We |
15874 | assume they will be the same, and we only store the last | |
15875 | one we see. */ | |
94af9270 KS |
15876 | if (cu->language == language_ada) |
15877 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 15878 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
15879 | break; |
15880 | case DW_AT_low_pc: | |
15881 | has_low_pc_attr = 1; | |
31aa7e4e | 15882 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
15883 | break; |
15884 | case DW_AT_high_pc: | |
15885 | has_high_pc_attr = 1; | |
31aa7e4e JB |
15886 | part_die->highpc = attr_value_as_address (&attr); |
15887 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
15888 | high_pc_relative = 1; | |
c906108c SS |
15889 | break; |
15890 | case DW_AT_location: | |
0963b4bd | 15891 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
15892 | if (attr_form_is_block (&attr)) |
15893 | { | |
95554aad | 15894 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 15895 | } |
3690dd37 | 15896 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 15897 | { |
4d3c2250 | 15898 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15899 | } |
15900 | else | |
15901 | { | |
4d3c2250 KB |
15902 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
15903 | "partial symbol information"); | |
8e19ed76 | 15904 | } |
c906108c | 15905 | break; |
c906108c SS |
15906 | case DW_AT_external: |
15907 | part_die->is_external = DW_UNSND (&attr); | |
15908 | break; | |
15909 | case DW_AT_declaration: | |
15910 | part_die->is_declaration = DW_UNSND (&attr); | |
15911 | break; | |
15912 | case DW_AT_type: | |
15913 | part_die->has_type = 1; | |
15914 | break; | |
15915 | case DW_AT_abstract_origin: | |
15916 | case DW_AT_specification: | |
72bf9492 DJ |
15917 | case DW_AT_extension: |
15918 | part_die->has_specification = 1; | |
c764a876 | 15919 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
15920 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
15921 | || cu->per_cu->is_dwz); | |
c906108c SS |
15922 | break; |
15923 | case DW_AT_sibling: | |
15924 | /* Ignore absolute siblings, they might point outside of | |
15925 | the current compile unit. */ | |
15926 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
15927 | complaint (&symfile_complaints, |
15928 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 15929 | else |
b9502d3f WN |
15930 | { |
15931 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
15932 | const gdb_byte *sibling_ptr = buffer + off; | |
15933 | ||
15934 | if (sibling_ptr < info_ptr) | |
15935 | complaint (&symfile_complaints, | |
15936 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
15937 | else if (sibling_ptr > reader->buffer_end) |
15938 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
15939 | else |
15940 | part_die->sibling = sibling_ptr; | |
15941 | } | |
c906108c | 15942 | break; |
fa4028e9 JB |
15943 | case DW_AT_byte_size: |
15944 | part_die->has_byte_size = 1; | |
15945 | break; | |
ff908ebf AW |
15946 | case DW_AT_const_value: |
15947 | part_die->has_const_value = 1; | |
15948 | break; | |
68511cec CES |
15949 | case DW_AT_calling_convention: |
15950 | /* DWARF doesn't provide a way to identify a program's source-level | |
15951 | entry point. DW_AT_calling_convention attributes are only meant | |
15952 | to describe functions' calling conventions. | |
15953 | ||
15954 | However, because it's a necessary piece of information in | |
15955 | Fortran, and because DW_CC_program is the only piece of debugging | |
15956 | information whose definition refers to a 'main program' at all, | |
15957 | several compilers have begun marking Fortran main programs with | |
15958 | DW_CC_program --- even when those functions use the standard | |
15959 | calling conventions. | |
15960 | ||
15961 | So until DWARF specifies a way to provide this information and | |
15962 | compilers pick up the new representation, we'll support this | |
15963 | practice. */ | |
15964 | if (DW_UNSND (&attr) == DW_CC_program | |
dc365182 JH |
15965 | && cu->language == language_fortran |
15966 | && part_die->name != NULL) | |
3d548a53 | 15967 | set_objfile_main_name (objfile, part_die->name, language_fortran); |
68511cec | 15968 | break; |
481860b3 GB |
15969 | case DW_AT_inline: |
15970 | if (DW_UNSND (&attr) == DW_INL_inlined | |
15971 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
15972 | part_die->may_be_inlined = 1; | |
15973 | break; | |
95554aad TT |
15974 | |
15975 | case DW_AT_import: | |
15976 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
15977 | { |
15978 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
15979 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
15980 | || cu->per_cu->is_dwz); | |
15981 | } | |
95554aad TT |
15982 | break; |
15983 | ||
c906108c SS |
15984 | default: |
15985 | break; | |
15986 | } | |
15987 | } | |
15988 | ||
91da1414 MW |
15989 | if (high_pc_relative) |
15990 | part_die->highpc += part_die->lowpc; | |
15991 | ||
9373cf26 JK |
15992 | if (has_low_pc_attr && has_high_pc_attr) |
15993 | { | |
15994 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
15995 | eliminate duplicate copies of functions and vtables and such. | |
15996 | The linker will arbitrarily choose one and discard the others. | |
15997 | The AT_*_pc values for such functions refer to local labels in | |
15998 | these sections. If the section from that file was discarded, the | |
15999 | labels are not in the output, so the relocs get a value of 0. | |
16000 | If this is a discarded function, mark the pc bounds as invalid, | |
16001 | so that GDB will ignore it. */ | |
16002 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
16003 | { | |
bb5ed363 | 16004 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16005 | |
16006 | complaint (&symfile_complaints, | |
16007 | _("DW_AT_low_pc %s is zero " | |
16008 | "for DIE at 0x%x [in module %s]"), | |
16009 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 16010 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
16011 | } |
16012 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
16013 | else if (part_die->lowpc >= part_die->highpc) | |
16014 | { | |
bb5ed363 | 16015 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16016 | |
16017 | complaint (&symfile_complaints, | |
16018 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
16019 | "for DIE at 0x%x [in module %s]"), | |
16020 | paddress (gdbarch, part_die->lowpc), | |
16021 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 16022 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
16023 | } |
16024 | else | |
16025 | part_die->has_pc_info = 1; | |
16026 | } | |
85cbf3d3 | 16027 | |
c906108c SS |
16028 | return info_ptr; |
16029 | } | |
16030 | ||
72bf9492 DJ |
16031 | /* Find a cached partial DIE at OFFSET in CU. */ |
16032 | ||
16033 | static struct partial_die_info * | |
b64f50a1 | 16034 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
16035 | { |
16036 | struct partial_die_info *lookup_die = NULL; | |
16037 | struct partial_die_info part_die; | |
16038 | ||
16039 | part_die.offset = offset; | |
9a3c8263 SM |
16040 | lookup_die = ((struct partial_die_info *) |
16041 | htab_find_with_hash (cu->partial_dies, &part_die, | |
16042 | offset.sect_off)); | |
72bf9492 | 16043 | |
72bf9492 DJ |
16044 | return lookup_die; |
16045 | } | |
16046 | ||
348e048f DE |
16047 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
16048 | except in the case of .debug_types DIEs which do not reference | |
16049 | outside their CU (they do however referencing other types via | |
55f1336d | 16050 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
16051 | |
16052 | static struct partial_die_info * | |
36586728 | 16053 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 16054 | { |
bb5ed363 | 16055 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
16056 | struct dwarf2_per_cu_data *per_cu = NULL; |
16057 | struct partial_die_info *pd = NULL; | |
72bf9492 | 16058 | |
36586728 TT |
16059 | if (offset_in_dwz == cu->per_cu->is_dwz |
16060 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
16061 | { |
16062 | pd = find_partial_die_in_comp_unit (offset, cu); | |
16063 | if (pd != NULL) | |
16064 | return pd; | |
0d99eb77 DE |
16065 | /* We missed recording what we needed. |
16066 | Load all dies and try again. */ | |
16067 | per_cu = cu->per_cu; | |
5afb4e99 | 16068 | } |
0d99eb77 DE |
16069 | else |
16070 | { | |
16071 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 16072 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
16073 | { |
16074 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
16075 | " external reference to offset 0x%lx [in module %s].\n"), | |
16076 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
16077 | bfd_get_filename (objfile->obfd)); | |
16078 | } | |
36586728 TT |
16079 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
16080 | objfile); | |
72bf9492 | 16081 | |
0d99eb77 DE |
16082 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
16083 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 16084 | |
0d99eb77 DE |
16085 | per_cu->cu->last_used = 0; |
16086 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
16087 | } | |
5afb4e99 | 16088 | |
dee91e82 DE |
16089 | /* If we didn't find it, and not all dies have been loaded, |
16090 | load them all and try again. */ | |
16091 | ||
5afb4e99 DJ |
16092 | if (pd == NULL && per_cu->load_all_dies == 0) |
16093 | { | |
5afb4e99 | 16094 | per_cu->load_all_dies = 1; |
fd820528 DE |
16095 | |
16096 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
16097 | THIS_CU->cu may already be in use. So we can't just free it and | |
16098 | replace its DIEs with the ones we read in. Instead, we leave those | |
16099 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
16100 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
16101 | set. */ | |
dee91e82 | 16102 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
16103 | |
16104 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
16105 | } | |
16106 | ||
16107 | if (pd == NULL) | |
16108 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
16109 | _("could not find partial DIE 0x%x " |
16110 | "in cache [from module %s]\n"), | |
b64f50a1 | 16111 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 16112 | return pd; |
72bf9492 DJ |
16113 | } |
16114 | ||
abc72ce4 DE |
16115 | /* See if we can figure out if the class lives in a namespace. We do |
16116 | this by looking for a member function; its demangled name will | |
16117 | contain namespace info, if there is any. */ | |
16118 | ||
16119 | static void | |
16120 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
16121 | struct dwarf2_cu *cu) | |
16122 | { | |
16123 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
16124 | what template types look like, because the demangler | |
16125 | frequently doesn't give the same name as the debug info. We | |
16126 | could fix this by only using the demangled name to get the | |
16127 | prefix (but see comment in read_structure_type). */ | |
16128 | ||
16129 | struct partial_die_info *real_pdi; | |
16130 | struct partial_die_info *child_pdi; | |
16131 | ||
16132 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
16133 | we should not do this. We'll prepend the parent's fully qualified | |
16134 | name when we create the partial symbol. */ | |
16135 | ||
16136 | real_pdi = struct_pdi; | |
16137 | while (real_pdi->has_specification) | |
36586728 TT |
16138 | real_pdi = find_partial_die (real_pdi->spec_offset, |
16139 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
16140 | |
16141 | if (real_pdi->die_parent != NULL) | |
16142 | return; | |
16143 | ||
16144 | for (child_pdi = struct_pdi->die_child; | |
16145 | child_pdi != NULL; | |
16146 | child_pdi = child_pdi->die_sibling) | |
16147 | { | |
16148 | if (child_pdi->tag == DW_TAG_subprogram | |
16149 | && child_pdi->linkage_name != NULL) | |
16150 | { | |
16151 | char *actual_class_name | |
16152 | = language_class_name_from_physname (cu->language_defn, | |
16153 | child_pdi->linkage_name); | |
16154 | if (actual_class_name != NULL) | |
16155 | { | |
16156 | struct_pdi->name | |
224c3ddb SM |
16157 | = ((const char *) |
16158 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16159 | actual_class_name, | |
16160 | strlen (actual_class_name))); | |
abc72ce4 DE |
16161 | xfree (actual_class_name); |
16162 | } | |
16163 | break; | |
16164 | } | |
16165 | } | |
16166 | } | |
16167 | ||
72bf9492 DJ |
16168 | /* Adjust PART_DIE before generating a symbol for it. This function |
16169 | may set the is_external flag or change the DIE's name. */ | |
16170 | ||
16171 | static void | |
16172 | fixup_partial_die (struct partial_die_info *part_die, | |
16173 | struct dwarf2_cu *cu) | |
16174 | { | |
abc72ce4 DE |
16175 | /* Once we've fixed up a die, there's no point in doing so again. |
16176 | This also avoids a memory leak if we were to call | |
16177 | guess_partial_die_structure_name multiple times. */ | |
16178 | if (part_die->fixup_called) | |
16179 | return; | |
16180 | ||
72bf9492 DJ |
16181 | /* If we found a reference attribute and the DIE has no name, try |
16182 | to find a name in the referred to DIE. */ | |
16183 | ||
16184 | if (part_die->name == NULL && part_die->has_specification) | |
16185 | { | |
16186 | struct partial_die_info *spec_die; | |
72bf9492 | 16187 | |
36586728 TT |
16188 | spec_die = find_partial_die (part_die->spec_offset, |
16189 | part_die->spec_is_dwz, cu); | |
72bf9492 | 16190 | |
10b3939b | 16191 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
16192 | |
16193 | if (spec_die->name) | |
16194 | { | |
16195 | part_die->name = spec_die->name; | |
16196 | ||
16197 | /* Copy DW_AT_external attribute if it is set. */ | |
16198 | if (spec_die->is_external) | |
16199 | part_die->is_external = spec_die->is_external; | |
16200 | } | |
16201 | } | |
16202 | ||
16203 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
16204 | |
16205 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 16206 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 16207 | |
abc72ce4 DE |
16208 | /* If there is no parent die to provide a namespace, and there are |
16209 | children, see if we can determine the namespace from their linkage | |
122d1940 | 16210 | name. */ |
abc72ce4 | 16211 | if (cu->language == language_cplus |
8b70b953 | 16212 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16213 | && part_die->die_parent == NULL |
16214 | && part_die->has_children | |
16215 | && (part_die->tag == DW_TAG_class_type | |
16216 | || part_die->tag == DW_TAG_structure_type | |
16217 | || part_die->tag == DW_TAG_union_type)) | |
16218 | guess_partial_die_structure_name (part_die, cu); | |
16219 | ||
53832f31 TT |
16220 | /* GCC might emit a nameless struct or union that has a linkage |
16221 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16222 | if (part_die->name == NULL | |
96408a79 SA |
16223 | && (part_die->tag == DW_TAG_class_type |
16224 | || part_die->tag == DW_TAG_interface_type | |
16225 | || part_die->tag == DW_TAG_structure_type | |
16226 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
16227 | && part_die->linkage_name != NULL) |
16228 | { | |
16229 | char *demangled; | |
16230 | ||
8de20a37 | 16231 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
16232 | if (demangled) |
16233 | { | |
96408a79 SA |
16234 | const char *base; |
16235 | ||
16236 | /* Strip any leading namespaces/classes, keep only the base name. | |
16237 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16238 | base = strrchr (demangled, ':'); | |
16239 | if (base && base > demangled && base[-1] == ':') | |
16240 | base++; | |
16241 | else | |
16242 | base = demangled; | |
16243 | ||
34a68019 | 16244 | part_die->name |
224c3ddb SM |
16245 | = ((const char *) |
16246 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16247 | base, strlen (base))); | |
53832f31 TT |
16248 | xfree (demangled); |
16249 | } | |
16250 | } | |
16251 | ||
abc72ce4 | 16252 | part_die->fixup_called = 1; |
72bf9492 DJ |
16253 | } |
16254 | ||
a8329558 | 16255 | /* Read an attribute value described by an attribute form. */ |
c906108c | 16256 | |
d521ce57 | 16257 | static const gdb_byte * |
dee91e82 DE |
16258 | read_attribute_value (const struct die_reader_specs *reader, |
16259 | struct attribute *attr, unsigned form, | |
d521ce57 | 16260 | const gdb_byte *info_ptr) |
c906108c | 16261 | { |
dee91e82 | 16262 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
16263 | struct objfile *objfile = cu->objfile; |
16264 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 16265 | bfd *abfd = reader->abfd; |
e7c27a73 | 16266 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16267 | unsigned int bytes_read; |
16268 | struct dwarf_block *blk; | |
16269 | ||
aead7601 | 16270 | attr->form = (enum dwarf_form) form; |
a8329558 | 16271 | switch (form) |
c906108c | 16272 | { |
c906108c | 16273 | case DW_FORM_ref_addr: |
ae411497 | 16274 | if (cu->header.version == 2) |
4568ecf9 | 16275 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 16276 | else |
4568ecf9 DE |
16277 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
16278 | &cu->header, &bytes_read); | |
ae411497 TT |
16279 | info_ptr += bytes_read; |
16280 | break; | |
36586728 TT |
16281 | case DW_FORM_GNU_ref_alt: |
16282 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16283 | info_ptr += bytes_read; | |
16284 | break; | |
ae411497 | 16285 | case DW_FORM_addr: |
e7c27a73 | 16286 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 16287 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 16288 | info_ptr += bytes_read; |
c906108c SS |
16289 | break; |
16290 | case DW_FORM_block2: | |
7b5a2f43 | 16291 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16292 | blk->size = read_2_bytes (abfd, info_ptr); |
16293 | info_ptr += 2; | |
16294 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16295 | info_ptr += blk->size; | |
16296 | DW_BLOCK (attr) = blk; | |
16297 | break; | |
16298 | case DW_FORM_block4: | |
7b5a2f43 | 16299 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16300 | blk->size = read_4_bytes (abfd, info_ptr); |
16301 | info_ptr += 4; | |
16302 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16303 | info_ptr += blk->size; | |
16304 | DW_BLOCK (attr) = blk; | |
16305 | break; | |
16306 | case DW_FORM_data2: | |
16307 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
16308 | info_ptr += 2; | |
16309 | break; | |
16310 | case DW_FORM_data4: | |
16311 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
16312 | info_ptr += 4; | |
16313 | break; | |
16314 | case DW_FORM_data8: | |
16315 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
16316 | info_ptr += 8; | |
16317 | break; | |
2dc7f7b3 TT |
16318 | case DW_FORM_sec_offset: |
16319 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16320 | info_ptr += bytes_read; | |
16321 | break; | |
c906108c | 16322 | case DW_FORM_string: |
9b1c24c8 | 16323 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 16324 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
16325 | info_ptr += bytes_read; |
16326 | break; | |
4bdf3d34 | 16327 | case DW_FORM_strp: |
36586728 TT |
16328 | if (!cu->per_cu->is_dwz) |
16329 | { | |
16330 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
16331 | &bytes_read); | |
16332 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16333 | info_ptr += bytes_read; | |
16334 | break; | |
16335 | } | |
16336 | /* FALLTHROUGH */ | |
16337 | case DW_FORM_GNU_strp_alt: | |
16338 | { | |
16339 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16340 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16341 | &bytes_read); | |
16342 | ||
16343 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16344 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16345 | info_ptr += bytes_read; | |
16346 | } | |
4bdf3d34 | 16347 | break; |
2dc7f7b3 | 16348 | case DW_FORM_exprloc: |
c906108c | 16349 | case DW_FORM_block: |
7b5a2f43 | 16350 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16351 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16352 | info_ptr += bytes_read; | |
16353 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16354 | info_ptr += blk->size; | |
16355 | DW_BLOCK (attr) = blk; | |
16356 | break; | |
16357 | case DW_FORM_block1: | |
7b5a2f43 | 16358 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16359 | blk->size = read_1_byte (abfd, info_ptr); |
16360 | info_ptr += 1; | |
16361 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16362 | info_ptr += blk->size; | |
16363 | DW_BLOCK (attr) = blk; | |
16364 | break; | |
16365 | case DW_FORM_data1: | |
16366 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16367 | info_ptr += 1; | |
16368 | break; | |
16369 | case DW_FORM_flag: | |
16370 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16371 | info_ptr += 1; | |
16372 | break; | |
2dc7f7b3 TT |
16373 | case DW_FORM_flag_present: |
16374 | DW_UNSND (attr) = 1; | |
16375 | break; | |
c906108c SS |
16376 | case DW_FORM_sdata: |
16377 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16378 | info_ptr += bytes_read; | |
16379 | break; | |
16380 | case DW_FORM_udata: | |
16381 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16382 | info_ptr += bytes_read; | |
16383 | break; | |
16384 | case DW_FORM_ref1: | |
4568ecf9 DE |
16385 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16386 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
16387 | info_ptr += 1; |
16388 | break; | |
16389 | case DW_FORM_ref2: | |
4568ecf9 DE |
16390 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16391 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
16392 | info_ptr += 2; |
16393 | break; | |
16394 | case DW_FORM_ref4: | |
4568ecf9 DE |
16395 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16396 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
16397 | info_ptr += 4; |
16398 | break; | |
613e1657 | 16399 | case DW_FORM_ref8: |
4568ecf9 DE |
16400 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16401 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
16402 | info_ptr += 8; |
16403 | break; | |
55f1336d | 16404 | case DW_FORM_ref_sig8: |
ac9ec31b | 16405 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16406 | info_ptr += 8; |
16407 | break; | |
c906108c | 16408 | case DW_FORM_ref_udata: |
4568ecf9 DE |
16409 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16410 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
16411 | info_ptr += bytes_read; |
16412 | break; | |
c906108c | 16413 | case DW_FORM_indirect: |
a8329558 KW |
16414 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16415 | info_ptr += bytes_read; | |
dee91e82 | 16416 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 16417 | break; |
3019eac3 DE |
16418 | case DW_FORM_GNU_addr_index: |
16419 | if (reader->dwo_file == NULL) | |
16420 | { | |
16421 | /* For now flag a hard error. | |
16422 | Later we can turn this into a complaint. */ | |
16423 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16424 | dwarf_form_name (form), | |
16425 | bfd_get_filename (abfd)); | |
16426 | } | |
16427 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16428 | info_ptr += bytes_read; | |
16429 | break; | |
16430 | case DW_FORM_GNU_str_index: | |
16431 | if (reader->dwo_file == NULL) | |
16432 | { | |
16433 | /* For now flag a hard error. | |
16434 | Later we can turn this into a complaint if warranted. */ | |
16435 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16436 | dwarf_form_name (form), | |
16437 | bfd_get_filename (abfd)); | |
16438 | } | |
16439 | { | |
16440 | ULONGEST str_index = | |
16441 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16442 | ||
342587c4 | 16443 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16444 | DW_STRING_IS_CANONICAL (attr) = 0; |
16445 | info_ptr += bytes_read; | |
16446 | } | |
16447 | break; | |
c906108c | 16448 | default: |
8a3fe4f8 | 16449 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16450 | dwarf_form_name (form), |
16451 | bfd_get_filename (abfd)); | |
c906108c | 16452 | } |
28e94949 | 16453 | |
36586728 | 16454 | /* Super hack. */ |
7771576e | 16455 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16456 | attr->form = DW_FORM_GNU_ref_alt; |
16457 | ||
28e94949 JB |
16458 | /* We have seen instances where the compiler tried to emit a byte |
16459 | size attribute of -1 which ended up being encoded as an unsigned | |
16460 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16461 | an object of this size seems pretty unlikely so we can relatively | |
16462 | safely treat these cases as if the size attribute was invalid and | |
16463 | treat them as zero by default. */ | |
16464 | if (attr->name == DW_AT_byte_size | |
16465 | && form == DW_FORM_data4 | |
16466 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16467 | { |
16468 | complaint | |
16469 | (&symfile_complaints, | |
43bbcdc2 PH |
16470 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
16471 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
16472 | DW_UNSND (attr) = 0; |
16473 | } | |
28e94949 | 16474 | |
c906108c SS |
16475 | return info_ptr; |
16476 | } | |
16477 | ||
a8329558 KW |
16478 | /* Read an attribute described by an abbreviated attribute. */ |
16479 | ||
d521ce57 | 16480 | static const gdb_byte * |
dee91e82 DE |
16481 | read_attribute (const struct die_reader_specs *reader, |
16482 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 16483 | const gdb_byte *info_ptr) |
a8329558 KW |
16484 | { |
16485 | attr->name = abbrev->name; | |
dee91e82 | 16486 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
16487 | } |
16488 | ||
0963b4bd | 16489 | /* Read dwarf information from a buffer. */ |
c906108c SS |
16490 | |
16491 | static unsigned int | |
a1855c1d | 16492 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16493 | { |
fe1b8b76 | 16494 | return bfd_get_8 (abfd, buf); |
c906108c SS |
16495 | } |
16496 | ||
16497 | static int | |
a1855c1d | 16498 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16499 | { |
fe1b8b76 | 16500 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
16501 | } |
16502 | ||
16503 | static unsigned int | |
a1855c1d | 16504 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16505 | { |
fe1b8b76 | 16506 | return bfd_get_16 (abfd, buf); |
c906108c SS |
16507 | } |
16508 | ||
21ae7a4d | 16509 | static int |
a1855c1d | 16510 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16511 | { |
16512 | return bfd_get_signed_16 (abfd, buf); | |
16513 | } | |
16514 | ||
c906108c | 16515 | static unsigned int |
a1855c1d | 16516 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16517 | { |
fe1b8b76 | 16518 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16519 | } |
16520 | ||
21ae7a4d | 16521 | static int |
a1855c1d | 16522 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16523 | { |
16524 | return bfd_get_signed_32 (abfd, buf); | |
16525 | } | |
16526 | ||
93311388 | 16527 | static ULONGEST |
a1855c1d | 16528 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16529 | { |
fe1b8b76 | 16530 | return bfd_get_64 (abfd, buf); |
c906108c SS |
16531 | } |
16532 | ||
16533 | static CORE_ADDR | |
d521ce57 | 16534 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 16535 | unsigned int *bytes_read) |
c906108c | 16536 | { |
e7c27a73 | 16537 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16538 | CORE_ADDR retval = 0; |
16539 | ||
107d2387 | 16540 | if (cu_header->signed_addr_p) |
c906108c | 16541 | { |
107d2387 AC |
16542 | switch (cu_header->addr_size) |
16543 | { | |
16544 | case 2: | |
fe1b8b76 | 16545 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
16546 | break; |
16547 | case 4: | |
fe1b8b76 | 16548 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
16549 | break; |
16550 | case 8: | |
fe1b8b76 | 16551 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
16552 | break; |
16553 | default: | |
8e65ff28 | 16554 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 16555 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 16556 | bfd_get_filename (abfd)); |
107d2387 AC |
16557 | } |
16558 | } | |
16559 | else | |
16560 | { | |
16561 | switch (cu_header->addr_size) | |
16562 | { | |
16563 | case 2: | |
fe1b8b76 | 16564 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
16565 | break; |
16566 | case 4: | |
fe1b8b76 | 16567 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
16568 | break; |
16569 | case 8: | |
fe1b8b76 | 16570 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
16571 | break; |
16572 | default: | |
8e65ff28 | 16573 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
16574 | _("read_address: bad switch, " |
16575 | "unsigned [in module %s]"), | |
659b0389 | 16576 | bfd_get_filename (abfd)); |
107d2387 | 16577 | } |
c906108c | 16578 | } |
64367e0a | 16579 | |
107d2387 AC |
16580 | *bytes_read = cu_header->addr_size; |
16581 | return retval; | |
c906108c SS |
16582 | } |
16583 | ||
f7ef9339 | 16584 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
16585 | specification allows the initial length to take up either 4 bytes |
16586 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
16587 | bytes describe the length and all offsets will be 8 bytes in length | |
16588 | instead of 4. | |
16589 | ||
f7ef9339 KB |
16590 | An older, non-standard 64-bit format is also handled by this |
16591 | function. The older format in question stores the initial length | |
16592 | as an 8-byte quantity without an escape value. Lengths greater | |
16593 | than 2^32 aren't very common which means that the initial 4 bytes | |
16594 | is almost always zero. Since a length value of zero doesn't make | |
16595 | sense for the 32-bit format, this initial zero can be considered to | |
16596 | be an escape value which indicates the presence of the older 64-bit | |
16597 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
16598 | greater than 4GB. If it becomes necessary to handle lengths |
16599 | somewhat larger than 4GB, we could allow other small values (such | |
16600 | as the non-sensical values of 1, 2, and 3) to also be used as | |
16601 | escape values indicating the presence of the old format. | |
f7ef9339 | 16602 | |
917c78fc MK |
16603 | The value returned via bytes_read should be used to increment the |
16604 | relevant pointer after calling read_initial_length(). | |
c764a876 | 16605 | |
613e1657 KB |
16606 | [ Note: read_initial_length() and read_offset() are based on the |
16607 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 16608 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
16609 | from: |
16610 | ||
f7ef9339 | 16611 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 16612 | |
613e1657 KB |
16613 | This document is only a draft and is subject to change. (So beware.) |
16614 | ||
f7ef9339 | 16615 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
16616 | determined empirically by examining 64-bit ELF files produced by |
16617 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
16618 | |
16619 | - Kevin, July 16, 2002 | |
613e1657 KB |
16620 | ] */ |
16621 | ||
16622 | static LONGEST | |
d521ce57 | 16623 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 16624 | { |
fe1b8b76 | 16625 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 16626 | |
dd373385 | 16627 | if (length == 0xffffffff) |
613e1657 | 16628 | { |
fe1b8b76 | 16629 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 16630 | *bytes_read = 12; |
613e1657 | 16631 | } |
dd373385 | 16632 | else if (length == 0) |
f7ef9339 | 16633 | { |
dd373385 | 16634 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 16635 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 16636 | *bytes_read = 8; |
f7ef9339 | 16637 | } |
613e1657 KB |
16638 | else |
16639 | { | |
16640 | *bytes_read = 4; | |
613e1657 KB |
16641 | } |
16642 | ||
c764a876 DE |
16643 | return length; |
16644 | } | |
dd373385 | 16645 | |
c764a876 DE |
16646 | /* Cover function for read_initial_length. |
16647 | Returns the length of the object at BUF, and stores the size of the | |
16648 | initial length in *BYTES_READ and stores the size that offsets will be in | |
16649 | *OFFSET_SIZE. | |
16650 | If the initial length size is not equivalent to that specified in | |
16651 | CU_HEADER then issue a complaint. | |
16652 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 16653 | |
c764a876 | 16654 | static LONGEST |
d521ce57 | 16655 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
16656 | const struct comp_unit_head *cu_header, |
16657 | unsigned int *bytes_read, | |
16658 | unsigned int *offset_size) | |
16659 | { | |
16660 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
16661 | ||
16662 | gdb_assert (cu_header->initial_length_size == 4 | |
16663 | || cu_header->initial_length_size == 8 | |
16664 | || cu_header->initial_length_size == 12); | |
16665 | ||
16666 | if (cu_header->initial_length_size != *bytes_read) | |
16667 | complaint (&symfile_complaints, | |
16668 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 16669 | |
c764a876 | 16670 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 16671 | return length; |
613e1657 KB |
16672 | } |
16673 | ||
16674 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 16675 | given by cu_header->offset_size. */ |
613e1657 KB |
16676 | |
16677 | static LONGEST | |
d521ce57 TT |
16678 | read_offset (bfd *abfd, const gdb_byte *buf, |
16679 | const struct comp_unit_head *cu_header, | |
891d2f0b | 16680 | unsigned int *bytes_read) |
c764a876 DE |
16681 | { |
16682 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 16683 | |
c764a876 DE |
16684 | *bytes_read = cu_header->offset_size; |
16685 | return offset; | |
16686 | } | |
16687 | ||
16688 | /* Read an offset from the data stream. */ | |
16689 | ||
16690 | static LONGEST | |
d521ce57 | 16691 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
16692 | { |
16693 | LONGEST retval = 0; | |
16694 | ||
c764a876 | 16695 | switch (offset_size) |
613e1657 KB |
16696 | { |
16697 | case 4: | |
fe1b8b76 | 16698 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
16699 | break; |
16700 | case 8: | |
fe1b8b76 | 16701 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
16702 | break; |
16703 | default: | |
8e65ff28 | 16704 | internal_error (__FILE__, __LINE__, |
c764a876 | 16705 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 16706 | bfd_get_filename (abfd)); |
613e1657 KB |
16707 | } |
16708 | ||
917c78fc | 16709 | return retval; |
613e1657 KB |
16710 | } |
16711 | ||
d521ce57 TT |
16712 | static const gdb_byte * |
16713 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
16714 | { |
16715 | /* If the size of a host char is 8 bits, we can return a pointer | |
16716 | to the buffer, otherwise we have to copy the data to a buffer | |
16717 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16718 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 16719 | return buf; |
c906108c SS |
16720 | } |
16721 | ||
d521ce57 TT |
16722 | static const char * |
16723 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
16724 | unsigned int *bytes_read_ptr) | |
c906108c SS |
16725 | { |
16726 | /* If the size of a host char is 8 bits, we can return a pointer | |
16727 | to the string, otherwise we have to copy the string to a buffer | |
16728 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16729 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
16730 | if (*buf == '\0') |
16731 | { | |
16732 | *bytes_read_ptr = 1; | |
16733 | return NULL; | |
16734 | } | |
d521ce57 TT |
16735 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
16736 | return (const char *) buf; | |
4bdf3d34 JJ |
16737 | } |
16738 | ||
d521ce57 | 16739 | static const char * |
cf2c3c16 | 16740 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 16741 | { |
be391dca | 16742 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 16743 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
16744 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
16745 | bfd_get_filename (abfd)); | |
dce234bc | 16746 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
16747 | error (_("DW_FORM_strp pointing outside of " |
16748 | ".debug_str section [in module %s]"), | |
16749 | bfd_get_filename (abfd)); | |
4bdf3d34 | 16750 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 16751 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 16752 | return NULL; |
d521ce57 | 16753 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
16754 | } |
16755 | ||
36586728 TT |
16756 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
16757 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
16758 | the string consists of a single NUL byte, return NULL; otherwise | |
16759 | return a pointer to the string. */ | |
16760 | ||
d521ce57 | 16761 | static const char * |
36586728 TT |
16762 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
16763 | { | |
16764 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
16765 | ||
16766 | if (dwz->str.buffer == NULL) | |
16767 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
16768 | "section [in module %s]"), | |
16769 | bfd_get_filename (dwz->dwz_bfd)); | |
16770 | if (str_offset >= dwz->str.size) | |
16771 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
16772 | ".debug_str section [in module %s]"), | |
16773 | bfd_get_filename (dwz->dwz_bfd)); | |
16774 | gdb_assert (HOST_CHAR_BIT == 8); | |
16775 | if (dwz->str.buffer[str_offset] == '\0') | |
16776 | return NULL; | |
d521ce57 | 16777 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
16778 | } |
16779 | ||
d521ce57 TT |
16780 | static const char * |
16781 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
16782 | const struct comp_unit_head *cu_header, |
16783 | unsigned int *bytes_read_ptr) | |
16784 | { | |
16785 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
16786 | ||
16787 | return read_indirect_string_at_offset (abfd, str_offset); | |
16788 | } | |
16789 | ||
12df843f | 16790 | static ULONGEST |
d521ce57 TT |
16791 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
16792 | unsigned int *bytes_read_ptr) | |
c906108c | 16793 | { |
12df843f | 16794 | ULONGEST result; |
ce5d95e1 | 16795 | unsigned int num_read; |
870f88f7 | 16796 | int shift; |
c906108c SS |
16797 | unsigned char byte; |
16798 | ||
16799 | result = 0; | |
16800 | shift = 0; | |
16801 | num_read = 0; | |
c906108c SS |
16802 | while (1) |
16803 | { | |
fe1b8b76 | 16804 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16805 | buf++; |
16806 | num_read++; | |
12df843f | 16807 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
16808 | if ((byte & 128) == 0) |
16809 | { | |
16810 | break; | |
16811 | } | |
16812 | shift += 7; | |
16813 | } | |
16814 | *bytes_read_ptr = num_read; | |
16815 | return result; | |
16816 | } | |
16817 | ||
12df843f | 16818 | static LONGEST |
d521ce57 TT |
16819 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
16820 | unsigned int *bytes_read_ptr) | |
c906108c | 16821 | { |
12df843f | 16822 | LONGEST result; |
870f88f7 | 16823 | int shift, num_read; |
c906108c SS |
16824 | unsigned char byte; |
16825 | ||
16826 | result = 0; | |
16827 | shift = 0; | |
c906108c | 16828 | num_read = 0; |
c906108c SS |
16829 | while (1) |
16830 | { | |
fe1b8b76 | 16831 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16832 | buf++; |
16833 | num_read++; | |
12df843f | 16834 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
16835 | shift += 7; |
16836 | if ((byte & 128) == 0) | |
16837 | { | |
16838 | break; | |
16839 | } | |
16840 | } | |
77e0b926 | 16841 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 16842 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
16843 | *bytes_read_ptr = num_read; |
16844 | return result; | |
16845 | } | |
16846 | ||
3019eac3 DE |
16847 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
16848 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
16849 | ADDR_SIZE is the size of addresses from the CU header. */ | |
16850 | ||
16851 | static CORE_ADDR | |
16852 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
16853 | { | |
16854 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16855 | bfd *abfd = objfile->obfd; | |
16856 | const gdb_byte *info_ptr; | |
16857 | ||
16858 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
16859 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
16860 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 16861 | objfile_name (objfile)); |
3019eac3 DE |
16862 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
16863 | error (_("DW_FORM_addr_index pointing outside of " | |
16864 | ".debug_addr section [in module %s]"), | |
4262abfb | 16865 | objfile_name (objfile)); |
3019eac3 DE |
16866 | info_ptr = (dwarf2_per_objfile->addr.buffer |
16867 | + addr_base + addr_index * addr_size); | |
16868 | if (addr_size == 4) | |
16869 | return bfd_get_32 (abfd, info_ptr); | |
16870 | else | |
16871 | return bfd_get_64 (abfd, info_ptr); | |
16872 | } | |
16873 | ||
16874 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
16875 | ||
16876 | static CORE_ADDR | |
16877 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
16878 | { | |
16879 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
16880 | } | |
16881 | ||
16882 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
16883 | ||
16884 | static CORE_ADDR | |
d521ce57 | 16885 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
16886 | unsigned int *bytes_read) |
16887 | { | |
16888 | bfd *abfd = cu->objfile->obfd; | |
16889 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
16890 | ||
16891 | return read_addr_index (cu, addr_index); | |
16892 | } | |
16893 | ||
16894 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
16895 | back to dwarf2_read_addr_index. */ | |
16896 | ||
16897 | struct dwarf2_read_addr_index_data | |
16898 | { | |
16899 | ULONGEST addr_base; | |
16900 | int addr_size; | |
16901 | }; | |
16902 | ||
16903 | /* die_reader_func for dwarf2_read_addr_index. */ | |
16904 | ||
16905 | static void | |
16906 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 16907 | const gdb_byte *info_ptr, |
3019eac3 DE |
16908 | struct die_info *comp_unit_die, |
16909 | int has_children, | |
16910 | void *data) | |
16911 | { | |
16912 | struct dwarf2_cu *cu = reader->cu; | |
16913 | struct dwarf2_read_addr_index_data *aidata = | |
16914 | (struct dwarf2_read_addr_index_data *) data; | |
16915 | ||
16916 | aidata->addr_base = cu->addr_base; | |
16917 | aidata->addr_size = cu->header.addr_size; | |
16918 | } | |
16919 | ||
16920 | /* Given an index in .debug_addr, fetch the value. | |
16921 | NOTE: This can be called during dwarf expression evaluation, | |
16922 | long after the debug information has been read, and thus per_cu->cu | |
16923 | may no longer exist. */ | |
16924 | ||
16925 | CORE_ADDR | |
16926 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
16927 | unsigned int addr_index) | |
16928 | { | |
16929 | struct objfile *objfile = per_cu->objfile; | |
16930 | struct dwarf2_cu *cu = per_cu->cu; | |
16931 | ULONGEST addr_base; | |
16932 | int addr_size; | |
16933 | ||
16934 | /* This is intended to be called from outside this file. */ | |
16935 | dw2_setup (objfile); | |
16936 | ||
16937 | /* We need addr_base and addr_size. | |
16938 | If we don't have PER_CU->cu, we have to get it. | |
16939 | Nasty, but the alternative is storing the needed info in PER_CU, | |
16940 | which at this point doesn't seem justified: it's not clear how frequently | |
16941 | it would get used and it would increase the size of every PER_CU. | |
16942 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
16943 | so we're not in uncharted territory here. | |
16944 | Alas we need to be a bit more complicated as addr_base is contained | |
16945 | in the DIE. | |
16946 | ||
16947 | We don't need to read the entire CU(/TU). | |
16948 | We just need the header and top level die. | |
a1b64ce1 | 16949 | |
3019eac3 | 16950 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 16951 | For now we skip this optimization. */ |
3019eac3 DE |
16952 | |
16953 | if (cu != NULL) | |
16954 | { | |
16955 | addr_base = cu->addr_base; | |
16956 | addr_size = cu->header.addr_size; | |
16957 | } | |
16958 | else | |
16959 | { | |
16960 | struct dwarf2_read_addr_index_data aidata; | |
16961 | ||
a1b64ce1 DE |
16962 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
16963 | we need addr_base. */ | |
16964 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
16965 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
16966 | addr_base = aidata.addr_base; |
16967 | addr_size = aidata.addr_size; | |
16968 | } | |
16969 | ||
16970 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
16971 | } | |
16972 | ||
57d63ce2 DE |
16973 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
16974 | This is only used by the Fission support. */ | |
3019eac3 | 16975 | |
d521ce57 | 16976 | static const char * |
342587c4 | 16977 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
16978 | { |
16979 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 16980 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 16981 | bfd *abfd = objfile->obfd; |
342587c4 | 16982 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
16983 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
16984 | struct dwarf2_section_info *str_offsets_section = | |
16985 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 16986 | const gdb_byte *info_ptr; |
3019eac3 | 16987 | ULONGEST str_offset; |
57d63ce2 | 16988 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 16989 | |
73869dc2 DE |
16990 | dwarf2_read_section (objfile, str_section); |
16991 | dwarf2_read_section (objfile, str_offsets_section); | |
16992 | if (str_section->buffer == NULL) | |
57d63ce2 | 16993 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 16994 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16995 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16996 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 16997 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 16998 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16999 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17000 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 17001 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 17002 | " section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 17003 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17004 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
17005 | + str_index * cu->header.offset_size); |
17006 | if (cu->header.offset_size == 4) | |
17007 | str_offset = bfd_get_32 (abfd, info_ptr); | |
17008 | else | |
17009 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 17010 | if (str_offset >= str_section->size) |
57d63ce2 | 17011 | error (_("Offset from %s pointing outside of" |
3019eac3 | 17012 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 17013 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 17014 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
17015 | } |
17016 | ||
3019eac3 DE |
17017 | /* Return the length of an LEB128 number in BUF. */ |
17018 | ||
17019 | static int | |
17020 | leb128_size (const gdb_byte *buf) | |
17021 | { | |
17022 | const gdb_byte *begin = buf; | |
17023 | gdb_byte byte; | |
17024 | ||
17025 | while (1) | |
17026 | { | |
17027 | byte = *buf++; | |
17028 | if ((byte & 128) == 0) | |
17029 | return buf - begin; | |
17030 | } | |
17031 | } | |
17032 | ||
c906108c | 17033 | static void |
e142c38c | 17034 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
17035 | { |
17036 | switch (lang) | |
17037 | { | |
17038 | case DW_LANG_C89: | |
76bee0cc | 17039 | case DW_LANG_C99: |
0cfd832f | 17040 | case DW_LANG_C11: |
c906108c | 17041 | case DW_LANG_C: |
d1be3247 | 17042 | case DW_LANG_UPC: |
e142c38c | 17043 | cu->language = language_c; |
c906108c SS |
17044 | break; |
17045 | case DW_LANG_C_plus_plus: | |
0cfd832f MW |
17046 | case DW_LANG_C_plus_plus_11: |
17047 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 17048 | cu->language = language_cplus; |
c906108c | 17049 | break; |
6aecb9c2 JB |
17050 | case DW_LANG_D: |
17051 | cu->language = language_d; | |
17052 | break; | |
c906108c SS |
17053 | case DW_LANG_Fortran77: |
17054 | case DW_LANG_Fortran90: | |
b21b22e0 | 17055 | case DW_LANG_Fortran95: |
f7de9aab MW |
17056 | case DW_LANG_Fortran03: |
17057 | case DW_LANG_Fortran08: | |
e142c38c | 17058 | cu->language = language_fortran; |
c906108c | 17059 | break; |
a766d390 DE |
17060 | case DW_LANG_Go: |
17061 | cu->language = language_go; | |
17062 | break; | |
c906108c | 17063 | case DW_LANG_Mips_Assembler: |
e142c38c | 17064 | cu->language = language_asm; |
c906108c | 17065 | break; |
bebd888e | 17066 | case DW_LANG_Java: |
e142c38c | 17067 | cu->language = language_java; |
bebd888e | 17068 | break; |
c906108c | 17069 | case DW_LANG_Ada83: |
8aaf0b47 | 17070 | case DW_LANG_Ada95: |
bc5f45f8 JB |
17071 | cu->language = language_ada; |
17072 | break; | |
72019c9c GM |
17073 | case DW_LANG_Modula2: |
17074 | cu->language = language_m2; | |
17075 | break; | |
fe8e67fd PM |
17076 | case DW_LANG_Pascal83: |
17077 | cu->language = language_pascal; | |
17078 | break; | |
22566fbd DJ |
17079 | case DW_LANG_ObjC: |
17080 | cu->language = language_objc; | |
17081 | break; | |
c44af4eb TT |
17082 | case DW_LANG_Rust: |
17083 | case DW_LANG_Rust_old: | |
17084 | cu->language = language_rust; | |
17085 | break; | |
c906108c SS |
17086 | case DW_LANG_Cobol74: |
17087 | case DW_LANG_Cobol85: | |
c906108c | 17088 | default: |
e142c38c | 17089 | cu->language = language_minimal; |
c906108c SS |
17090 | break; |
17091 | } | |
e142c38c | 17092 | cu->language_defn = language_def (cu->language); |
c906108c SS |
17093 | } |
17094 | ||
17095 | /* Return the named attribute or NULL if not there. */ | |
17096 | ||
17097 | static struct attribute * | |
e142c38c | 17098 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 17099 | { |
a48e046c | 17100 | for (;;) |
c906108c | 17101 | { |
a48e046c TT |
17102 | unsigned int i; |
17103 | struct attribute *spec = NULL; | |
17104 | ||
17105 | for (i = 0; i < die->num_attrs; ++i) | |
17106 | { | |
17107 | if (die->attrs[i].name == name) | |
17108 | return &die->attrs[i]; | |
17109 | if (die->attrs[i].name == DW_AT_specification | |
17110 | || die->attrs[i].name == DW_AT_abstract_origin) | |
17111 | spec = &die->attrs[i]; | |
17112 | } | |
17113 | ||
17114 | if (!spec) | |
17115 | break; | |
c906108c | 17116 | |
f2f0e013 | 17117 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 17118 | } |
c5aa993b | 17119 | |
c906108c SS |
17120 | return NULL; |
17121 | } | |
17122 | ||
348e048f DE |
17123 | /* Return the named attribute or NULL if not there, |
17124 | but do not follow DW_AT_specification, etc. | |
17125 | This is for use in contexts where we're reading .debug_types dies. | |
17126 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
17127 | back up the chain, and we want to go down. */ | |
17128 | ||
17129 | static struct attribute * | |
45e58e77 | 17130 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
17131 | { |
17132 | unsigned int i; | |
17133 | ||
17134 | for (i = 0; i < die->num_attrs; ++i) | |
17135 | if (die->attrs[i].name == name) | |
17136 | return &die->attrs[i]; | |
17137 | ||
17138 | return NULL; | |
17139 | } | |
17140 | ||
7d45c7c3 KB |
17141 | /* Return the string associated with a string-typed attribute, or NULL if it |
17142 | is either not found or is of an incorrect type. */ | |
17143 | ||
17144 | static const char * | |
17145 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
17146 | { | |
17147 | struct attribute *attr; | |
17148 | const char *str = NULL; | |
17149 | ||
17150 | attr = dwarf2_attr (die, name, cu); | |
17151 | ||
17152 | if (attr != NULL) | |
17153 | { | |
17154 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_string | |
17155 | || attr->form == DW_FORM_GNU_strp_alt) | |
17156 | str = DW_STRING (attr); | |
17157 | else | |
17158 | complaint (&symfile_complaints, | |
17159 | _("string type expected for attribute %s for " | |
17160 | "DIE at 0x%x in module %s"), | |
17161 | dwarf_attr_name (name), die->offset.sect_off, | |
17162 | objfile_name (cu->objfile)); | |
17163 | } | |
17164 | ||
17165 | return str; | |
17166 | } | |
17167 | ||
05cf31d1 JB |
17168 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
17169 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 17170 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
17171 | |
17172 | static int | |
17173 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
17174 | { | |
17175 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
17176 | ||
17177 | return (attr && DW_UNSND (attr)); | |
17178 | } | |
17179 | ||
3ca72b44 | 17180 | static int |
e142c38c | 17181 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 17182 | { |
05cf31d1 JB |
17183 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
17184 | which value is non-zero. However, we have to be careful with | |
17185 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
17186 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
17187 | end up accidently finding a declaration attribute that belongs | |
17188 | to a different DIE referenced by the specification attribute, | |
17189 | even though the given DIE does not have a declaration attribute. */ | |
17190 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
17191 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
17192 | } |
17193 | ||
63d06c5c | 17194 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 17195 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
17196 | containing the return value on output. If there is no |
17197 | specification, but there is an abstract origin, that is | |
17198 | returned. */ | |
63d06c5c DC |
17199 | |
17200 | static struct die_info * | |
f2f0e013 | 17201 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 17202 | { |
f2f0e013 DJ |
17203 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
17204 | *spec_cu); | |
63d06c5c | 17205 | |
edb3359d DJ |
17206 | if (spec_attr == NULL) |
17207 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
17208 | ||
63d06c5c DC |
17209 | if (spec_attr == NULL) |
17210 | return NULL; | |
17211 | else | |
f2f0e013 | 17212 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 17213 | } |
c906108c | 17214 | |
debd256d | 17215 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
17216 | refers to. |
17217 | NOTE: This is also used as a "cleanup" function. */ | |
17218 | ||
debd256d JB |
17219 | static void |
17220 | free_line_header (struct line_header *lh) | |
17221 | { | |
17222 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 17223 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
17224 | |
17225 | /* Remember that all the lh->file_names[i].name pointers are | |
17226 | pointers into debug_line_buffer, and don't need to be freed. */ | |
17227 | if (lh->file_names) | |
a8bc7b56 | 17228 | xfree (lh->file_names); |
debd256d JB |
17229 | |
17230 | /* Similarly for the include directory names. */ | |
17231 | if (lh->include_dirs) | |
a8bc7b56 | 17232 | xfree (lh->include_dirs); |
debd256d | 17233 | |
a8bc7b56 | 17234 | xfree (lh); |
debd256d JB |
17235 | } |
17236 | ||
527f3840 JK |
17237 | /* Stub for free_line_header to match void * callback types. */ |
17238 | ||
17239 | static void | |
17240 | free_line_header_voidp (void *arg) | |
17241 | { | |
9a3c8263 | 17242 | struct line_header *lh = (struct line_header *) arg; |
527f3840 JK |
17243 | |
17244 | free_line_header (lh); | |
17245 | } | |
17246 | ||
debd256d | 17247 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 17248 | |
debd256d | 17249 | static void |
d521ce57 | 17250 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 17251 | { |
27e0867f DE |
17252 | if (dwarf_line_debug >= 2) |
17253 | fprintf_unfiltered (gdb_stdlog, "Adding dir %u: %s\n", | |
17254 | lh->num_include_dirs + 1, include_dir); | |
17255 | ||
debd256d JB |
17256 | /* Grow the array if necessary. */ |
17257 | if (lh->include_dirs_size == 0) | |
c5aa993b | 17258 | { |
debd256d | 17259 | lh->include_dirs_size = 1; /* for testing */ |
8d749320 | 17260 | lh->include_dirs = XNEWVEC (const char *, lh->include_dirs_size); |
debd256d JB |
17261 | } |
17262 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
17263 | { | |
17264 | lh->include_dirs_size *= 2; | |
8d749320 SM |
17265 | lh->include_dirs = XRESIZEVEC (const char *, lh->include_dirs, |
17266 | lh->include_dirs_size); | |
c5aa993b | 17267 | } |
c906108c | 17268 | |
debd256d JB |
17269 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
17270 | } | |
6e70227d | 17271 | |
debd256d | 17272 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 17273 | |
debd256d JB |
17274 | static void |
17275 | add_file_name (struct line_header *lh, | |
d521ce57 | 17276 | const char *name, |
debd256d JB |
17277 | unsigned int dir_index, |
17278 | unsigned int mod_time, | |
17279 | unsigned int length) | |
17280 | { | |
17281 | struct file_entry *fe; | |
17282 | ||
27e0867f DE |
17283 | if (dwarf_line_debug >= 2) |
17284 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
17285 | lh->num_file_names + 1, name); | |
17286 | ||
debd256d JB |
17287 | /* Grow the array if necessary. */ |
17288 | if (lh->file_names_size == 0) | |
17289 | { | |
17290 | lh->file_names_size = 1; /* for testing */ | |
8d749320 | 17291 | lh->file_names = XNEWVEC (struct file_entry, lh->file_names_size); |
debd256d JB |
17292 | } |
17293 | else if (lh->num_file_names >= lh->file_names_size) | |
17294 | { | |
17295 | lh->file_names_size *= 2; | |
224c3ddb SM |
17296 | lh->file_names |
17297 | = XRESIZEVEC (struct file_entry, lh->file_names, lh->file_names_size); | |
debd256d JB |
17298 | } |
17299 | ||
17300 | fe = &lh->file_names[lh->num_file_names++]; | |
17301 | fe->name = name; | |
17302 | fe->dir_index = dir_index; | |
17303 | fe->mod_time = mod_time; | |
17304 | fe->length = length; | |
aaa75496 | 17305 | fe->included_p = 0; |
cb1df416 | 17306 | fe->symtab = NULL; |
debd256d | 17307 | } |
6e70227d | 17308 | |
83769d0b | 17309 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
17310 | |
17311 | static struct dwarf2_section_info * | |
17312 | get_debug_line_section (struct dwarf2_cu *cu) | |
17313 | { | |
17314 | struct dwarf2_section_info *section; | |
17315 | ||
17316 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
17317 | DWO file. */ | |
17318 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
17319 | section = &cu->dwo_unit->dwo_file->sections.line; | |
17320 | else if (cu->per_cu->is_dwz) | |
17321 | { | |
17322 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17323 | ||
17324 | section = &dwz->line; | |
17325 | } | |
17326 | else | |
17327 | section = &dwarf2_per_objfile->line; | |
17328 | ||
17329 | return section; | |
17330 | } | |
17331 | ||
debd256d | 17332 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 17333 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 17334 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
17335 | Returns NULL if there is a problem reading the header, e.g., if it |
17336 | has a version we don't understand. | |
debd256d JB |
17337 | |
17338 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
17339 | the returned object point into the dwarf line section buffer, |
17340 | and must not be freed. */ | |
ae2de4f8 | 17341 | |
debd256d | 17342 | static struct line_header * |
3019eac3 | 17343 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
17344 | { |
17345 | struct cleanup *back_to; | |
17346 | struct line_header *lh; | |
d521ce57 | 17347 | const gdb_byte *line_ptr; |
c764a876 | 17348 | unsigned int bytes_read, offset_size; |
debd256d | 17349 | int i; |
d521ce57 | 17350 | const char *cur_dir, *cur_file; |
3019eac3 DE |
17351 | struct dwarf2_section_info *section; |
17352 | bfd *abfd; | |
17353 | ||
36586728 | 17354 | section = get_debug_line_section (cu); |
3019eac3 DE |
17355 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
17356 | if (section->buffer == NULL) | |
debd256d | 17357 | { |
3019eac3 DE |
17358 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
17359 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
17360 | else | |
17361 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
17362 | return 0; |
17363 | } | |
17364 | ||
fceca515 DE |
17365 | /* We can't do this until we know the section is non-empty. |
17366 | Only then do we know we have such a section. */ | |
a32a8923 | 17367 | abfd = get_section_bfd_owner (section); |
fceca515 | 17368 | |
a738430d MK |
17369 | /* Make sure that at least there's room for the total_length field. |
17370 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 17371 | if (offset + 4 >= section->size) |
debd256d | 17372 | { |
4d3c2250 | 17373 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
17374 | return 0; |
17375 | } | |
17376 | ||
8d749320 | 17377 | lh = XNEW (struct line_header); |
debd256d JB |
17378 | memset (lh, 0, sizeof (*lh)); |
17379 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
17380 | (void *) lh); | |
17381 | ||
527f3840 JK |
17382 | lh->offset.sect_off = offset; |
17383 | lh->offset_in_dwz = cu->per_cu->is_dwz; | |
17384 | ||
3019eac3 | 17385 | line_ptr = section->buffer + offset; |
debd256d | 17386 | |
a738430d | 17387 | /* Read in the header. */ |
6e70227d | 17388 | lh->total_length = |
c764a876 DE |
17389 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
17390 | &bytes_read, &offset_size); | |
debd256d | 17391 | line_ptr += bytes_read; |
3019eac3 | 17392 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 17393 | { |
4d3c2250 | 17394 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 17395 | do_cleanups (back_to); |
debd256d JB |
17396 | return 0; |
17397 | } | |
17398 | lh->statement_program_end = line_ptr + lh->total_length; | |
17399 | lh->version = read_2_bytes (abfd, line_ptr); | |
17400 | line_ptr += 2; | |
cd366ee8 DE |
17401 | if (lh->version > 4) |
17402 | { | |
17403 | /* This is a version we don't understand. The format could have | |
17404 | changed in ways we don't handle properly so just punt. */ | |
17405 | complaint (&symfile_complaints, | |
17406 | _("unsupported version in .debug_line section")); | |
17407 | return NULL; | |
17408 | } | |
c764a876 DE |
17409 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
17410 | line_ptr += offset_size; | |
debd256d JB |
17411 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
17412 | line_ptr += 1; | |
2dc7f7b3 TT |
17413 | if (lh->version >= 4) |
17414 | { | |
17415 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
17416 | line_ptr += 1; | |
17417 | } | |
17418 | else | |
17419 | lh->maximum_ops_per_instruction = 1; | |
17420 | ||
17421 | if (lh->maximum_ops_per_instruction == 0) | |
17422 | { | |
17423 | lh->maximum_ops_per_instruction = 1; | |
17424 | complaint (&symfile_complaints, | |
3e43a32a MS |
17425 | _("invalid maximum_ops_per_instruction " |
17426 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
17427 | } |
17428 | ||
debd256d JB |
17429 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
17430 | line_ptr += 1; | |
17431 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
17432 | line_ptr += 1; | |
17433 | lh->line_range = read_1_byte (abfd, line_ptr); | |
17434 | line_ptr += 1; | |
17435 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
17436 | line_ptr += 1; | |
8d749320 | 17437 | lh->standard_opcode_lengths = XNEWVEC (unsigned char, lh->opcode_base); |
debd256d JB |
17438 | |
17439 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
17440 | for (i = 1; i < lh->opcode_base; ++i) | |
17441 | { | |
17442 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
17443 | line_ptr += 1; | |
17444 | } | |
17445 | ||
a738430d | 17446 | /* Read directory table. */ |
9b1c24c8 | 17447 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17448 | { |
17449 | line_ptr += bytes_read; | |
17450 | add_include_dir (lh, cur_dir); | |
17451 | } | |
17452 | line_ptr += bytes_read; | |
17453 | ||
a738430d | 17454 | /* Read file name table. */ |
9b1c24c8 | 17455 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17456 | { |
17457 | unsigned int dir_index, mod_time, length; | |
17458 | ||
17459 | line_ptr += bytes_read; | |
17460 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17461 | line_ptr += bytes_read; | |
17462 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17463 | line_ptr += bytes_read; | |
17464 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17465 | line_ptr += bytes_read; | |
17466 | ||
17467 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17468 | } | |
17469 | line_ptr += bytes_read; | |
6e70227d | 17470 | lh->statement_program_start = line_ptr; |
debd256d | 17471 | |
3019eac3 | 17472 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 17473 | complaint (&symfile_complaints, |
3e43a32a MS |
17474 | _("line number info header doesn't " |
17475 | "fit in `.debug_line' section")); | |
debd256d JB |
17476 | |
17477 | discard_cleanups (back_to); | |
17478 | return lh; | |
17479 | } | |
c906108c | 17480 | |
c6da4cef DE |
17481 | /* Subroutine of dwarf_decode_lines to simplify it. |
17482 | Return the file name of the psymtab for included file FILE_INDEX | |
17483 | in line header LH of PST. | |
17484 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17485 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
17486 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
17487 | ||
17488 | The function creates dangling cleanup registration. */ | |
c6da4cef | 17489 | |
d521ce57 | 17490 | static const char * |
c6da4cef DE |
17491 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
17492 | const struct partial_symtab *pst, | |
17493 | const char *comp_dir) | |
17494 | { | |
17495 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
17496 | const char *include_name = fe.name; |
17497 | const char *include_name_to_compare = include_name; | |
17498 | const char *dir_name = NULL; | |
72b9f47f TT |
17499 | const char *pst_filename; |
17500 | char *copied_name = NULL; | |
c6da4cef DE |
17501 | int file_is_pst; |
17502 | ||
afa6c9ab | 17503 | if (fe.dir_index && lh->include_dirs != NULL) |
c6da4cef DE |
17504 | dir_name = lh->include_dirs[fe.dir_index - 1]; |
17505 | ||
17506 | if (!IS_ABSOLUTE_PATH (include_name) | |
17507 | && (dir_name != NULL || comp_dir != NULL)) | |
17508 | { | |
17509 | /* Avoid creating a duplicate psymtab for PST. | |
17510 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
17511 | Before we do the comparison, however, we need to account | |
17512 | for DIR_NAME and COMP_DIR. | |
17513 | First prepend dir_name (if non-NULL). If we still don't | |
17514 | have an absolute path prepend comp_dir (if non-NULL). | |
17515 | However, the directory we record in the include-file's | |
17516 | psymtab does not contain COMP_DIR (to match the | |
17517 | corresponding symtab(s)). | |
17518 | ||
17519 | Example: | |
17520 | ||
17521 | bash$ cd /tmp | |
17522 | bash$ gcc -g ./hello.c | |
17523 | include_name = "hello.c" | |
17524 | dir_name = "." | |
17525 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
17526 | DW_AT_name = "./hello.c" |
17527 | ||
17528 | */ | |
c6da4cef DE |
17529 | |
17530 | if (dir_name != NULL) | |
17531 | { | |
d521ce57 TT |
17532 | char *tem = concat (dir_name, SLASH_STRING, |
17533 | include_name, (char *)NULL); | |
17534 | ||
17535 | make_cleanup (xfree, tem); | |
17536 | include_name = tem; | |
c6da4cef | 17537 | include_name_to_compare = include_name; |
c6da4cef DE |
17538 | } |
17539 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
17540 | { | |
d521ce57 TT |
17541 | char *tem = concat (comp_dir, SLASH_STRING, |
17542 | include_name, (char *)NULL); | |
17543 | ||
17544 | make_cleanup (xfree, tem); | |
17545 | include_name_to_compare = tem; | |
c6da4cef DE |
17546 | } |
17547 | } | |
17548 | ||
17549 | pst_filename = pst->filename; | |
17550 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
17551 | { | |
72b9f47f TT |
17552 | copied_name = concat (pst->dirname, SLASH_STRING, |
17553 | pst_filename, (char *)NULL); | |
17554 | pst_filename = copied_name; | |
c6da4cef DE |
17555 | } |
17556 | ||
1e3fad37 | 17557 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 17558 | |
72b9f47f TT |
17559 | if (copied_name != NULL) |
17560 | xfree (copied_name); | |
c6da4cef DE |
17561 | |
17562 | if (file_is_pst) | |
17563 | return NULL; | |
17564 | return include_name; | |
17565 | } | |
17566 | ||
d9b3de22 DE |
17567 | /* State machine to track the state of the line number program. */ |
17568 | ||
17569 | typedef struct | |
17570 | { | |
17571 | /* These are part of the standard DWARF line number state machine. */ | |
17572 | ||
17573 | unsigned char op_index; | |
17574 | unsigned int file; | |
17575 | unsigned int line; | |
17576 | CORE_ADDR address; | |
17577 | int is_stmt; | |
17578 | unsigned int discriminator; | |
17579 | ||
17580 | /* Additional bits of state we need to track. */ | |
17581 | ||
17582 | /* The last file that we called dwarf2_start_subfile for. | |
17583 | This is only used for TLLs. */ | |
17584 | unsigned int last_file; | |
17585 | /* The last file a line number was recorded for. */ | |
17586 | struct subfile *last_subfile; | |
17587 | ||
17588 | /* The function to call to record a line. */ | |
17589 | record_line_ftype *record_line; | |
17590 | ||
17591 | /* The last line number that was recorded, used to coalesce | |
17592 | consecutive entries for the same line. This can happen, for | |
17593 | example, when discriminators are present. PR 17276. */ | |
17594 | unsigned int last_line; | |
17595 | int line_has_non_zero_discriminator; | |
17596 | } lnp_state_machine; | |
17597 | ||
17598 | /* There's a lot of static state to pass to dwarf_record_line. | |
17599 | This keeps it all together. */ | |
17600 | ||
17601 | typedef struct | |
17602 | { | |
17603 | /* The gdbarch. */ | |
17604 | struct gdbarch *gdbarch; | |
17605 | ||
17606 | /* The line number header. */ | |
17607 | struct line_header *line_header; | |
17608 | ||
17609 | /* Non-zero if we're recording lines. | |
17610 | Otherwise we're building partial symtabs and are just interested in | |
17611 | finding include files mentioned by the line number program. */ | |
17612 | int record_lines_p; | |
17613 | } lnp_reader_state; | |
17614 | ||
c91513d8 PP |
17615 | /* Ignore this record_line request. */ |
17616 | ||
17617 | static void | |
17618 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
17619 | { | |
17620 | return; | |
17621 | } | |
17622 | ||
a05a36a5 DE |
17623 | /* Return non-zero if we should add LINE to the line number table. |
17624 | LINE is the line to add, LAST_LINE is the last line that was added, | |
17625 | LAST_SUBFILE is the subfile for LAST_LINE. | |
17626 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
17627 | had a non-zero discriminator. | |
17628 | ||
17629 | We have to be careful in the presence of discriminators. | |
17630 | E.g., for this line: | |
17631 | ||
17632 | for (i = 0; i < 100000; i++); | |
17633 | ||
17634 | clang can emit four line number entries for that one line, | |
17635 | each with a different discriminator. | |
17636 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
17637 | ||
17638 | However, we want gdb to coalesce all four entries into one. | |
17639 | Otherwise the user could stepi into the middle of the line and | |
17640 | gdb would get confused about whether the pc really was in the | |
17641 | middle of the line. | |
17642 | ||
17643 | Things are further complicated by the fact that two consecutive | |
17644 | line number entries for the same line is a heuristic used by gcc | |
17645 | to denote the end of the prologue. So we can't just discard duplicate | |
17646 | entries, we have to be selective about it. The heuristic we use is | |
17647 | that we only collapse consecutive entries for the same line if at least | |
17648 | one of those entries has a non-zero discriminator. PR 17276. | |
17649 | ||
17650 | Note: Addresses in the line number state machine can never go backwards | |
17651 | within one sequence, thus this coalescing is ok. */ | |
17652 | ||
17653 | static int | |
17654 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
17655 | int line_has_non_zero_discriminator, | |
17656 | struct subfile *last_subfile) | |
17657 | { | |
17658 | if (current_subfile != last_subfile) | |
17659 | return 1; | |
17660 | if (line != last_line) | |
17661 | return 1; | |
17662 | /* Same line for the same file that we've seen already. | |
17663 | As a last check, for pr 17276, only record the line if the line | |
17664 | has never had a non-zero discriminator. */ | |
17665 | if (!line_has_non_zero_discriminator) | |
17666 | return 1; | |
17667 | return 0; | |
17668 | } | |
17669 | ||
252a6764 DE |
17670 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
17671 | in the line table of subfile SUBFILE. */ | |
17672 | ||
17673 | static void | |
d9b3de22 DE |
17674 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
17675 | unsigned int line, CORE_ADDR address, | |
17676 | record_line_ftype p_record_line) | |
252a6764 DE |
17677 | { |
17678 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17679 | ||
27e0867f DE |
17680 | if (dwarf_line_debug) |
17681 | { | |
17682 | fprintf_unfiltered (gdb_stdlog, | |
17683 | "Recording line %u, file %s, address %s\n", | |
17684 | line, lbasename (subfile->name), | |
17685 | paddress (gdbarch, address)); | |
17686 | } | |
17687 | ||
d5962de5 | 17688 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
17689 | } |
17690 | ||
17691 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
17692 | Mark the end of a set of line number records. | |
d9b3de22 | 17693 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
17694 | If SUBFILE is NULL the request is ignored. */ |
17695 | ||
17696 | static void | |
17697 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
17698 | CORE_ADDR address, record_line_ftype p_record_line) | |
17699 | { | |
27e0867f DE |
17700 | if (subfile == NULL) |
17701 | return; | |
17702 | ||
17703 | if (dwarf_line_debug) | |
17704 | { | |
17705 | fprintf_unfiltered (gdb_stdlog, | |
17706 | "Finishing current line, file %s, address %s\n", | |
17707 | lbasename (subfile->name), | |
17708 | paddress (gdbarch, address)); | |
17709 | } | |
17710 | ||
d9b3de22 DE |
17711 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
17712 | } | |
17713 | ||
17714 | /* Record the line in STATE. | |
17715 | END_SEQUENCE is non-zero if we're processing the end of a sequence. */ | |
17716 | ||
17717 | static void | |
17718 | dwarf_record_line (lnp_reader_state *reader, lnp_state_machine *state, | |
17719 | int end_sequence) | |
17720 | { | |
17721 | const struct line_header *lh = reader->line_header; | |
17722 | unsigned int file, line, discriminator; | |
17723 | int is_stmt; | |
17724 | ||
17725 | file = state->file; | |
17726 | line = state->line; | |
17727 | is_stmt = state->is_stmt; | |
17728 | discriminator = state->discriminator; | |
17729 | ||
17730 | if (dwarf_line_debug) | |
17731 | { | |
17732 | fprintf_unfiltered (gdb_stdlog, | |
17733 | "Processing actual line %u: file %u," | |
17734 | " address %s, is_stmt %u, discrim %u\n", | |
17735 | line, file, | |
17736 | paddress (reader->gdbarch, state->address), | |
17737 | is_stmt, discriminator); | |
17738 | } | |
17739 | ||
17740 | if (file == 0 || file - 1 >= lh->num_file_names) | |
17741 | dwarf2_debug_line_missing_file_complaint (); | |
17742 | /* For now we ignore lines not starting on an instruction boundary. | |
17743 | But not when processing end_sequence for compatibility with the | |
17744 | previous version of the code. */ | |
17745 | else if (state->op_index == 0 || end_sequence) | |
17746 | { | |
17747 | lh->file_names[file - 1].included_p = 1; | |
17748 | if (reader->record_lines_p && is_stmt) | |
17749 | { | |
e815d2d2 | 17750 | if (state->last_subfile != current_subfile || end_sequence) |
d9b3de22 DE |
17751 | { |
17752 | dwarf_finish_line (reader->gdbarch, state->last_subfile, | |
17753 | state->address, state->record_line); | |
17754 | } | |
17755 | ||
17756 | if (!end_sequence) | |
17757 | { | |
17758 | if (dwarf_record_line_p (line, state->last_line, | |
17759 | state->line_has_non_zero_discriminator, | |
17760 | state->last_subfile)) | |
17761 | { | |
17762 | dwarf_record_line_1 (reader->gdbarch, current_subfile, | |
17763 | line, state->address, | |
17764 | state->record_line); | |
17765 | } | |
17766 | state->last_subfile = current_subfile; | |
17767 | state->last_line = line; | |
17768 | } | |
17769 | } | |
17770 | } | |
17771 | } | |
17772 | ||
17773 | /* Initialize STATE for the start of a line number program. */ | |
17774 | ||
17775 | static void | |
17776 | init_lnp_state_machine (lnp_state_machine *state, | |
17777 | const lnp_reader_state *reader) | |
17778 | { | |
17779 | memset (state, 0, sizeof (*state)); | |
17780 | ||
17781 | /* Just starting, there is no "last file". */ | |
17782 | state->last_file = 0; | |
17783 | state->last_subfile = NULL; | |
17784 | ||
17785 | state->record_line = record_line; | |
17786 | ||
17787 | state->last_line = 0; | |
17788 | state->line_has_non_zero_discriminator = 0; | |
17789 | ||
17790 | /* Initialize these according to the DWARF spec. */ | |
17791 | state->op_index = 0; | |
17792 | state->file = 1; | |
17793 | state->line = 1; | |
17794 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there | |
17795 | was a line entry for it so that the backend has a chance to adjust it | |
17796 | and also record it in case it needs it. This is currently used by MIPS | |
17797 | code, cf. `mips_adjust_dwarf2_line'. */ | |
17798 | state->address = gdbarch_adjust_dwarf2_line (reader->gdbarch, 0, 0); | |
17799 | state->is_stmt = reader->line_header->default_is_stmt; | |
17800 | state->discriminator = 0; | |
252a6764 DE |
17801 | } |
17802 | ||
924c2928 DE |
17803 | /* Check address and if invalid nop-out the rest of the lines in this |
17804 | sequence. */ | |
17805 | ||
17806 | static void | |
d9b3de22 | 17807 | check_line_address (struct dwarf2_cu *cu, lnp_state_machine *state, |
924c2928 DE |
17808 | const gdb_byte *line_ptr, |
17809 | CORE_ADDR lowpc, CORE_ADDR address) | |
17810 | { | |
17811 | /* If address < lowpc then it's not a usable value, it's outside the | |
17812 | pc range of the CU. However, we restrict the test to only address | |
17813 | values of zero to preserve GDB's previous behaviour which is to | |
17814 | handle the specific case of a function being GC'd by the linker. */ | |
17815 | ||
17816 | if (address == 0 && address < lowpc) | |
17817 | { | |
17818 | /* This line table is for a function which has been | |
17819 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
17820 | ||
17821 | struct objfile *objfile = cu->objfile; | |
17822 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
17823 | ||
17824 | complaint (&symfile_complaints, | |
17825 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
17826 | line_offset, objfile_name (objfile)); | |
d9b3de22 DE |
17827 | state->record_line = noop_record_line; |
17828 | /* Note: sm.record_line is left as noop_record_line | |
924c2928 DE |
17829 | until we see DW_LNE_end_sequence. */ |
17830 | } | |
17831 | } | |
17832 | ||
f3f5162e | 17833 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
17834 | Process the line number information in LH. |
17835 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
17836 | program in order to set included_p for every referenced header. */ | |
debd256d | 17837 | |
c906108c | 17838 | static void |
43f3e411 DE |
17839 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
17840 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 17841 | { |
d521ce57 TT |
17842 | const gdb_byte *line_ptr, *extended_end; |
17843 | const gdb_byte *line_end; | |
a8c50c1f | 17844 | unsigned int bytes_read, extended_len; |
699ca60a | 17845 | unsigned char op_code, extended_op; |
e142c38c DJ |
17846 | CORE_ADDR baseaddr; |
17847 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 17848 | bfd *abfd = objfile->obfd; |
fbf65064 | 17849 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
d9b3de22 DE |
17850 | /* Non-zero if we're recording line info (as opposed to building partial |
17851 | symtabs). */ | |
17852 | int record_lines_p = !decode_for_pst_p; | |
17853 | /* A collection of things we need to pass to dwarf_record_line. */ | |
17854 | lnp_reader_state reader_state; | |
e142c38c DJ |
17855 | |
17856 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17857 | |
debd256d JB |
17858 | line_ptr = lh->statement_program_start; |
17859 | line_end = lh->statement_program_end; | |
c906108c | 17860 | |
d9b3de22 DE |
17861 | reader_state.gdbarch = gdbarch; |
17862 | reader_state.line_header = lh; | |
17863 | reader_state.record_lines_p = record_lines_p; | |
17864 | ||
c906108c SS |
17865 | /* Read the statement sequences until there's nothing left. */ |
17866 | while (line_ptr < line_end) | |
17867 | { | |
d9b3de22 DE |
17868 | /* The DWARF line number program state machine. */ |
17869 | lnp_state_machine state_machine; | |
c906108c | 17870 | int end_sequence = 0; |
d9b3de22 DE |
17871 | |
17872 | /* Reset the state machine at the start of each sequence. */ | |
17873 | init_lnp_state_machine (&state_machine, &reader_state); | |
17874 | ||
17875 | if (record_lines_p && lh->num_file_names >= state_machine.file) | |
c906108c | 17876 | { |
aaa75496 | 17877 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
17878 | /* lh->include_dirs and lh->file_names are 0-based, but the |
17879 | directory and file name numbers in the statement program | |
17880 | are 1-based. */ | |
d9b3de22 | 17881 | struct file_entry *fe = &lh->file_names[state_machine.file - 1]; |
d521ce57 | 17882 | const char *dir = NULL; |
a738430d | 17883 | |
afa6c9ab | 17884 | if (fe->dir_index && lh->include_dirs != NULL) |
debd256d | 17885 | dir = lh->include_dirs[fe->dir_index - 1]; |
4f1520fb | 17886 | |
4d663531 | 17887 | dwarf2_start_subfile (fe->name, dir); |
c906108c SS |
17888 | } |
17889 | ||
a738430d | 17890 | /* Decode the table. */ |
d9b3de22 | 17891 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
17892 | { |
17893 | op_code = read_1_byte (abfd, line_ptr); | |
17894 | line_ptr += 1; | |
9aa1fe7e | 17895 | |
debd256d | 17896 | if (op_code >= lh->opcode_base) |
6e70227d | 17897 | { |
8e07a239 | 17898 | /* Special opcode. */ |
699ca60a | 17899 | unsigned char adj_opcode; |
3e29f34a | 17900 | CORE_ADDR addr_adj; |
a05a36a5 | 17901 | int line_delta; |
8e07a239 | 17902 | |
debd256d | 17903 | adj_opcode = op_code - lh->opcode_base; |
d9b3de22 DE |
17904 | addr_adj = (((state_machine.op_index |
17905 | + (adj_opcode / lh->line_range)) | |
2dc7f7b3 TT |
17906 | / lh->maximum_ops_per_instruction) |
17907 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
17908 | state_machine.address |
17909 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
17910 | state_machine.op_index = ((state_machine.op_index | |
17911 | + (adj_opcode / lh->line_range)) | |
17912 | % lh->maximum_ops_per_instruction); | |
a05a36a5 | 17913 | line_delta = lh->line_base + (adj_opcode % lh->line_range); |
d9b3de22 | 17914 | state_machine.line += line_delta; |
a05a36a5 | 17915 | if (line_delta != 0) |
d9b3de22 DE |
17916 | state_machine.line_has_non_zero_discriminator |
17917 | = state_machine.discriminator != 0; | |
17918 | ||
17919 | dwarf_record_line (&reader_state, &state_machine, 0); | |
17920 | state_machine.discriminator = 0; | |
9aa1fe7e GK |
17921 | } |
17922 | else switch (op_code) | |
c906108c SS |
17923 | { |
17924 | case DW_LNS_extended_op: | |
3e43a32a MS |
17925 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
17926 | &bytes_read); | |
473b7be6 | 17927 | line_ptr += bytes_read; |
a8c50c1f | 17928 | extended_end = line_ptr + extended_len; |
c906108c SS |
17929 | extended_op = read_1_byte (abfd, line_ptr); |
17930 | line_ptr += 1; | |
17931 | switch (extended_op) | |
17932 | { | |
17933 | case DW_LNE_end_sequence: | |
d9b3de22 | 17934 | state_machine.record_line = record_line; |
c906108c | 17935 | end_sequence = 1; |
c906108c SS |
17936 | break; |
17937 | case DW_LNE_set_address: | |
d9b3de22 DE |
17938 | { |
17939 | CORE_ADDR address | |
17940 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
17941 | ||
17942 | line_ptr += bytes_read; | |
17943 | check_line_address (cu, &state_machine, line_ptr, | |
17944 | lowpc, address); | |
17945 | state_machine.op_index = 0; | |
17946 | address += baseaddr; | |
17947 | state_machine.address | |
17948 | = gdbarch_adjust_dwarf2_line (gdbarch, address, 0); | |
17949 | } | |
c906108c SS |
17950 | break; |
17951 | case DW_LNE_define_file: | |
debd256d | 17952 | { |
d521ce57 | 17953 | const char *cur_file; |
debd256d | 17954 | unsigned int dir_index, mod_time, length; |
6e70227d | 17955 | |
3e43a32a MS |
17956 | cur_file = read_direct_string (abfd, line_ptr, |
17957 | &bytes_read); | |
debd256d JB |
17958 | line_ptr += bytes_read; |
17959 | dir_index = | |
17960 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17961 | line_ptr += bytes_read; | |
17962 | mod_time = | |
17963 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17964 | line_ptr += bytes_read; | |
17965 | length = | |
17966 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17967 | line_ptr += bytes_read; | |
17968 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17969 | } | |
c906108c | 17970 | break; |
d0c6ba3d CC |
17971 | case DW_LNE_set_discriminator: |
17972 | /* The discriminator is not interesting to the debugger; | |
a05a36a5 DE |
17973 | just ignore it. We still need to check its value though: |
17974 | if there are consecutive entries for the same | |
17975 | (non-prologue) line we want to coalesce them. | |
17976 | PR 17276. */ | |
d9b3de22 DE |
17977 | state_machine.discriminator |
17978 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17979 | state_machine.line_has_non_zero_discriminator | |
17980 | |= state_machine.discriminator != 0; | |
a05a36a5 | 17981 | line_ptr += bytes_read; |
d0c6ba3d | 17982 | break; |
c906108c | 17983 | default: |
4d3c2250 | 17984 | complaint (&symfile_complaints, |
e2e0b3e5 | 17985 | _("mangled .debug_line section")); |
debd256d | 17986 | return; |
c906108c | 17987 | } |
a8c50c1f DJ |
17988 | /* Make sure that we parsed the extended op correctly. If e.g. |
17989 | we expected a different address size than the producer used, | |
17990 | we may have read the wrong number of bytes. */ | |
17991 | if (line_ptr != extended_end) | |
17992 | { | |
17993 | complaint (&symfile_complaints, | |
17994 | _("mangled .debug_line section")); | |
17995 | return; | |
17996 | } | |
c906108c SS |
17997 | break; |
17998 | case DW_LNS_copy: | |
d9b3de22 DE |
17999 | dwarf_record_line (&reader_state, &state_machine, 0); |
18000 | state_machine.discriminator = 0; | |
c906108c SS |
18001 | break; |
18002 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
18003 | { |
18004 | CORE_ADDR adjust | |
18005 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
3e29f34a | 18006 | CORE_ADDR addr_adj; |
2dc7f7b3 | 18007 | |
d9b3de22 | 18008 | addr_adj = (((state_machine.op_index + adjust) |
2dc7f7b3 TT |
18009 | / lh->maximum_ops_per_instruction) |
18010 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
18011 | state_machine.address |
18012 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18013 | state_machine.op_index = ((state_machine.op_index + adjust) | |
18014 | % lh->maximum_ops_per_instruction); | |
2dc7f7b3 TT |
18015 | line_ptr += bytes_read; |
18016 | } | |
c906108c SS |
18017 | break; |
18018 | case DW_LNS_advance_line: | |
a05a36a5 DE |
18019 | { |
18020 | int line_delta | |
18021 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
18022 | ||
d9b3de22 | 18023 | state_machine.line += line_delta; |
a05a36a5 | 18024 | if (line_delta != 0) |
d9b3de22 DE |
18025 | state_machine.line_has_non_zero_discriminator |
18026 | = state_machine.discriminator != 0; | |
a05a36a5 DE |
18027 | line_ptr += bytes_read; |
18028 | } | |
c906108c SS |
18029 | break; |
18030 | case DW_LNS_set_file: | |
d9b3de22 DE |
18031 | { |
18032 | /* The arrays lh->include_dirs and lh->file_names are | |
18033 | 0-based, but the directory and file name numbers in | |
18034 | the statement program are 1-based. */ | |
18035 | struct file_entry *fe; | |
18036 | const char *dir = NULL; | |
18037 | ||
18038 | state_machine.file = read_unsigned_leb128 (abfd, line_ptr, | |
18039 | &bytes_read); | |
18040 | line_ptr += bytes_read; | |
18041 | if (state_machine.file == 0 | |
18042 | || state_machine.file - 1 >= lh->num_file_names) | |
18043 | dwarf2_debug_line_missing_file_complaint (); | |
18044 | else | |
18045 | { | |
18046 | fe = &lh->file_names[state_machine.file - 1]; | |
18047 | if (fe->dir_index && lh->include_dirs != NULL) | |
18048 | dir = lh->include_dirs[fe->dir_index - 1]; | |
18049 | if (record_lines_p) | |
18050 | { | |
18051 | state_machine.last_subfile = current_subfile; | |
18052 | state_machine.line_has_non_zero_discriminator | |
18053 | = state_machine.discriminator != 0; | |
18054 | dwarf2_start_subfile (fe->name, dir); | |
18055 | } | |
18056 | } | |
18057 | } | |
c906108c SS |
18058 | break; |
18059 | case DW_LNS_set_column: | |
0ad93d4f | 18060 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
18061 | line_ptr += bytes_read; |
18062 | break; | |
18063 | case DW_LNS_negate_stmt: | |
d9b3de22 | 18064 | state_machine.is_stmt = (!state_machine.is_stmt); |
c906108c SS |
18065 | break; |
18066 | case DW_LNS_set_basic_block: | |
c906108c | 18067 | break; |
c2c6d25f JM |
18068 | /* Add to the address register of the state machine the |
18069 | address increment value corresponding to special opcode | |
a738430d MK |
18070 | 255. I.e., this value is scaled by the minimum |
18071 | instruction length since special opcode 255 would have | |
b021a221 | 18072 | scaled the increment. */ |
c906108c | 18073 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
18074 | { |
18075 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
3e29f34a | 18076 | CORE_ADDR addr_adj; |
2dc7f7b3 | 18077 | |
d9b3de22 | 18078 | addr_adj = (((state_machine.op_index + adjust) |
2dc7f7b3 TT |
18079 | / lh->maximum_ops_per_instruction) |
18080 | * lh->minimum_instruction_length); | |
d9b3de22 DE |
18081 | state_machine.address |
18082 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18083 | state_machine.op_index = ((state_machine.op_index + adjust) | |
18084 | % lh->maximum_ops_per_instruction); | |
2dc7f7b3 | 18085 | } |
c906108c SS |
18086 | break; |
18087 | case DW_LNS_fixed_advance_pc: | |
3e29f34a MR |
18088 | { |
18089 | CORE_ADDR addr_adj; | |
18090 | ||
18091 | addr_adj = read_2_bytes (abfd, line_ptr); | |
d9b3de22 DE |
18092 | state_machine.address |
18093 | += gdbarch_adjust_dwarf2_line (gdbarch, addr_adj, 1); | |
18094 | state_machine.op_index = 0; | |
3e29f34a MR |
18095 | line_ptr += 2; |
18096 | } | |
c906108c | 18097 | break; |
9aa1fe7e | 18098 | default: |
a738430d MK |
18099 | { |
18100 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 18101 | int i; |
a738430d | 18102 | |
debd256d | 18103 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
18104 | { |
18105 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18106 | line_ptr += bytes_read; | |
18107 | } | |
18108 | } | |
c906108c SS |
18109 | } |
18110 | } | |
d9b3de22 DE |
18111 | |
18112 | if (!end_sequence) | |
18113 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
18114 | ||
18115 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
18116 | in which case we still finish recording the last line). */ | |
18117 | dwarf_record_line (&reader_state, &state_machine, 1); | |
c906108c | 18118 | } |
f3f5162e DE |
18119 | } |
18120 | ||
18121 | /* Decode the Line Number Program (LNP) for the given line_header | |
18122 | structure and CU. The actual information extracted and the type | |
18123 | of structures created from the LNP depends on the value of PST. | |
18124 | ||
18125 | 1. If PST is NULL, then this procedure uses the data from the program | |
18126 | to create all necessary symbol tables, and their linetables. | |
18127 | ||
18128 | 2. If PST is not NULL, this procedure reads the program to determine | |
18129 | the list of files included by the unit represented by PST, and | |
18130 | builds all the associated partial symbol tables. | |
18131 | ||
18132 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18133 | It is used for relative paths in the line table. | |
18134 | NOTE: When processing partial symtabs (pst != NULL), | |
18135 | comp_dir == pst->dirname. | |
18136 | ||
18137 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
18138 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
18139 | symtab we don't use it in the name of the psymtabs we create. | |
18140 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
18141 | A good testcase for this is mb-inline.exp. |
18142 | ||
527f3840 JK |
18143 | LOWPC is the lowest address in CU (or 0 if not known). |
18144 | ||
18145 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
18146 | for its PC<->lines mapping information. Otherwise only the filename | |
18147 | table is read in. */ | |
f3f5162e DE |
18148 | |
18149 | static void | |
18150 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 18151 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 18152 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
18153 | { |
18154 | struct objfile *objfile = cu->objfile; | |
18155 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 18156 | |
527f3840 JK |
18157 | if (decode_mapping) |
18158 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
18159 | |
18160 | if (decode_for_pst_p) | |
18161 | { | |
18162 | int file_index; | |
18163 | ||
18164 | /* Now that we're done scanning the Line Header Program, we can | |
18165 | create the psymtab of each included file. */ | |
18166 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
18167 | if (lh->file_names[file_index].included_p == 1) | |
18168 | { | |
d521ce57 | 18169 | const char *include_name = |
c6da4cef DE |
18170 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
18171 | if (include_name != NULL) | |
aaa75496 JB |
18172 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
18173 | } | |
18174 | } | |
cb1df416 DJ |
18175 | else |
18176 | { | |
18177 | /* Make sure a symtab is created for every file, even files | |
18178 | which contain only variables (i.e. no code with associated | |
18179 | line numbers). */ | |
43f3e411 | 18180 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 18181 | int i; |
cb1df416 DJ |
18182 | |
18183 | for (i = 0; i < lh->num_file_names; i++) | |
18184 | { | |
d521ce57 | 18185 | const char *dir = NULL; |
f3f5162e | 18186 | struct file_entry *fe; |
9a619af0 | 18187 | |
cb1df416 | 18188 | fe = &lh->file_names[i]; |
afa6c9ab | 18189 | if (fe->dir_index && lh->include_dirs != NULL) |
cb1df416 | 18190 | dir = lh->include_dirs[fe->dir_index - 1]; |
4d663531 | 18191 | dwarf2_start_subfile (fe->name, dir); |
cb1df416 | 18192 | |
cb1df416 | 18193 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
18194 | { |
18195 | current_subfile->symtab | |
18196 | = allocate_symtab (cust, current_subfile->name); | |
18197 | } | |
cb1df416 DJ |
18198 | fe->symtab = current_subfile->symtab; |
18199 | } | |
18200 | } | |
c906108c SS |
18201 | } |
18202 | ||
18203 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
18204 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 18205 | or NULL if not known. |
c906108c SS |
18206 | This routine tries to keep line numbers from identical absolute and |
18207 | relative file names in a common subfile. | |
18208 | ||
18209 | Using the `list' example from the GDB testsuite, which resides in | |
18210 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
18211 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
18212 | ||
c5aa993b | 18213 | DW_AT_name: /srcdir/list0.c |
4d663531 | 18214 | DW_AT_comp_dir: /compdir |
357e46e7 | 18215 | files.files[0].name: list0.h |
c5aa993b | 18216 | files.files[0].dir: /srcdir |
357e46e7 | 18217 | files.files[1].name: list0.c |
c5aa993b | 18218 | files.files[1].dir: /srcdir |
c906108c SS |
18219 | |
18220 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
18221 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
18222 | start_subfile will ensure that this happens provided that we pass the | |
18223 | concatenation of files.files[1].dir and files.files[1].name as the | |
18224 | subfile's name. */ | |
c906108c SS |
18225 | |
18226 | static void | |
4d663531 | 18227 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 18228 | { |
d521ce57 | 18229 | char *copy = NULL; |
4f1520fb | 18230 | |
4d663531 | 18231 | /* In order not to lose the line information directory, |
4f1520fb FR |
18232 | we concatenate it to the filename when it makes sense. |
18233 | Note that the Dwarf3 standard says (speaking of filenames in line | |
18234 | information): ``The directory index is ignored for file names | |
18235 | that represent full path names''. Thus ignoring dirname in the | |
18236 | `else' branch below isn't an issue. */ | |
c906108c | 18237 | |
d5166ae1 | 18238 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
18239 | { |
18240 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
18241 | filename = copy; | |
18242 | } | |
c906108c | 18243 | |
4d663531 | 18244 | start_subfile (filename); |
4f1520fb | 18245 | |
d521ce57 TT |
18246 | if (copy != NULL) |
18247 | xfree (copy); | |
c906108c SS |
18248 | } |
18249 | ||
f4dc4d17 DE |
18250 | /* Start a symtab for DWARF. |
18251 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
18252 | ||
43f3e411 | 18253 | static struct compunit_symtab * |
f4dc4d17 | 18254 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 18255 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 18256 | { |
43f3e411 DE |
18257 | struct compunit_symtab *cust |
18258 | = start_symtab (cu->objfile, name, comp_dir, low_pc); | |
18259 | ||
f4dc4d17 DE |
18260 | record_debugformat ("DWARF 2"); |
18261 | record_producer (cu->producer); | |
18262 | ||
18263 | /* We assume that we're processing GCC output. */ | |
18264 | processing_gcc_compilation = 2; | |
18265 | ||
4d4ec4e5 | 18266 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
18267 | |
18268 | return cust; | |
f4dc4d17 DE |
18269 | } |
18270 | ||
4c2df51b DJ |
18271 | static void |
18272 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18273 | struct dwarf2_cu *cu) |
4c2df51b | 18274 | { |
e7c27a73 DJ |
18275 | struct objfile *objfile = cu->objfile; |
18276 | struct comp_unit_head *cu_header = &cu->header; | |
18277 | ||
4c2df51b DJ |
18278 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
18279 | code here to turn a symbol with DW_AT_external and a | |
18280 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
18281 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
18282 | with some versions of binutils) where shared libraries could have | |
18283 | relocations against symbols in their debug information - the | |
18284 | minimal symbol would have the right address, but the debug info | |
18285 | would not. It's no longer necessary, because we will explicitly | |
18286 | apply relocations when we read in the debug information now. */ | |
18287 | ||
18288 | /* A DW_AT_location attribute with no contents indicates that a | |
18289 | variable has been optimized away. */ | |
18290 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
18291 | { | |
f1e6e072 | 18292 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
18293 | return; |
18294 | } | |
18295 | ||
18296 | /* Handle one degenerate form of location expression specially, to | |
18297 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
18298 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
18299 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
18300 | |
18301 | if (attr_form_is_block (attr) | |
3019eac3 DE |
18302 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
18303 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
18304 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
18305 | && (DW_BLOCK (attr)->size | |
18306 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 18307 | { |
891d2f0b | 18308 | unsigned int dummy; |
4c2df51b | 18309 | |
3019eac3 DE |
18310 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
18311 | SYMBOL_VALUE_ADDRESS (sym) = | |
18312 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
18313 | else | |
18314 | SYMBOL_VALUE_ADDRESS (sym) = | |
18315 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 18316 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
18317 | fixup_symbol_section (sym, objfile); |
18318 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
18319 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
18320 | return; |
18321 | } | |
18322 | ||
18323 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
18324 | expression evaluator, and use LOC_COMPUTED only when necessary | |
18325 | (i.e. when the value of a register or memory location is | |
18326 | referenced, or a thread-local block, etc.). Then again, it might | |
18327 | not be worthwhile. I'm assuming that it isn't unless performance | |
18328 | or memory numbers show me otherwise. */ | |
18329 | ||
f1e6e072 | 18330 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 18331 | |
f1e6e072 | 18332 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 18333 | cu->has_loclist = 1; |
4c2df51b DJ |
18334 | } |
18335 | ||
c906108c SS |
18336 | /* Given a pointer to a DWARF information entry, figure out if we need |
18337 | to make a symbol table entry for it, and if so, create a new entry | |
18338 | and return a pointer to it. | |
18339 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
18340 | used the passed type. |
18341 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
18342 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
18343 | |
18344 | static struct symbol * | |
34eaf542 TT |
18345 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
18346 | struct symbol *space) | |
c906108c | 18347 | { |
e7c27a73 | 18348 | struct objfile *objfile = cu->objfile; |
3e29f34a | 18349 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 18350 | struct symbol *sym = NULL; |
15d034d0 | 18351 | const char *name; |
c906108c SS |
18352 | struct attribute *attr = NULL; |
18353 | struct attribute *attr2 = NULL; | |
e142c38c | 18354 | CORE_ADDR baseaddr; |
e37fd15a SW |
18355 | struct pending **list_to_add = NULL; |
18356 | ||
edb3359d | 18357 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
18358 | |
18359 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 18360 | |
94af9270 | 18361 | name = dwarf2_name (die, cu); |
c906108c SS |
18362 | if (name) |
18363 | { | |
94af9270 | 18364 | const char *linkagename; |
34eaf542 | 18365 | int suppress_add = 0; |
94af9270 | 18366 | |
34eaf542 TT |
18367 | if (space) |
18368 | sym = space; | |
18369 | else | |
e623cf5d | 18370 | sym = allocate_symbol (objfile); |
c906108c | 18371 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
18372 | |
18373 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 18374 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
18375 | linkagename = dwarf2_physname (name, die, cu); |
18376 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 18377 | |
f55ee35c JK |
18378 | /* Fortran does not have mangling standard and the mangling does differ |
18379 | between gfortran, iFort etc. */ | |
18380 | if (cu->language == language_fortran | |
b250c185 | 18381 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 18382 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 18383 | dwarf2_full_name (name, die, cu), |
29df156d | 18384 | NULL); |
f55ee35c | 18385 | |
c906108c | 18386 | /* Default assumptions. |
c5aa993b | 18387 | Use the passed type or decode it from the die. */ |
176620f1 | 18388 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 18389 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
18390 | if (type != NULL) |
18391 | SYMBOL_TYPE (sym) = type; | |
18392 | else | |
e7c27a73 | 18393 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
18394 | attr = dwarf2_attr (die, |
18395 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
18396 | cu); | |
c906108c SS |
18397 | if (attr) |
18398 | { | |
18399 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
18400 | } | |
cb1df416 | 18401 | |
edb3359d DJ |
18402 | attr = dwarf2_attr (die, |
18403 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
18404 | cu); | |
cb1df416 DJ |
18405 | if (attr) |
18406 | { | |
18407 | int file_index = DW_UNSND (attr); | |
9a619af0 | 18408 | |
cb1df416 DJ |
18409 | if (cu->line_header == NULL |
18410 | || file_index > cu->line_header->num_file_names) | |
18411 | complaint (&symfile_complaints, | |
18412 | _("file index out of range")); | |
1c3d648d | 18413 | else if (file_index > 0) |
cb1df416 DJ |
18414 | { |
18415 | struct file_entry *fe; | |
9a619af0 | 18416 | |
cb1df416 | 18417 | fe = &cu->line_header->file_names[file_index - 1]; |
08be3fe3 | 18418 | symbol_set_symtab (sym, fe->symtab); |
cb1df416 DJ |
18419 | } |
18420 | } | |
18421 | ||
c906108c SS |
18422 | switch (die->tag) |
18423 | { | |
18424 | case DW_TAG_label: | |
e142c38c | 18425 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 18426 | if (attr) |
3e29f34a MR |
18427 | { |
18428 | CORE_ADDR addr; | |
18429 | ||
18430 | addr = attr_value_as_address (attr); | |
18431 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
18432 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
18433 | } | |
0f5238ed TT |
18434 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
18435 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 18436 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 18437 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
18438 | break; |
18439 | case DW_TAG_subprogram: | |
18440 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
18441 | finish_block. */ | |
f1e6e072 | 18442 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 18443 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
18444 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
18445 | || cu->language == language_ada) | |
c906108c | 18446 | { |
2cfa0c8d JB |
18447 | /* Subprograms marked external are stored as a global symbol. |
18448 | Ada subprograms, whether marked external or not, are always | |
18449 | stored as a global symbol, because we want to be able to | |
18450 | access them globally. For instance, we want to be able | |
18451 | to break on a nested subprogram without having to | |
18452 | specify the context. */ | |
e37fd15a | 18453 | list_to_add = &global_symbols; |
c906108c SS |
18454 | } |
18455 | else | |
18456 | { | |
e37fd15a | 18457 | list_to_add = cu->list_in_scope; |
c906108c SS |
18458 | } |
18459 | break; | |
edb3359d DJ |
18460 | case DW_TAG_inlined_subroutine: |
18461 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
18462 | finish_block. */ | |
f1e6e072 | 18463 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 18464 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 18465 | list_to_add = cu->list_in_scope; |
edb3359d | 18466 | break; |
34eaf542 TT |
18467 | case DW_TAG_template_value_param: |
18468 | suppress_add = 1; | |
18469 | /* Fall through. */ | |
72929c62 | 18470 | case DW_TAG_constant: |
c906108c | 18471 | case DW_TAG_variable: |
254e6b9e | 18472 | case DW_TAG_member: |
0963b4bd MS |
18473 | /* Compilation with minimal debug info may result in |
18474 | variables with missing type entries. Change the | |
18475 | misleading `void' type to something sensible. */ | |
c906108c | 18476 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 18477 | SYMBOL_TYPE (sym) |
46bf5051 | 18478 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 18479 | |
e142c38c | 18480 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
18481 | /* In the case of DW_TAG_member, we should only be called for |
18482 | static const members. */ | |
18483 | if (die->tag == DW_TAG_member) | |
18484 | { | |
3863f96c DE |
18485 | /* dwarf2_add_field uses die_is_declaration, |
18486 | so we do the same. */ | |
254e6b9e DE |
18487 | gdb_assert (die_is_declaration (die, cu)); |
18488 | gdb_assert (attr); | |
18489 | } | |
c906108c SS |
18490 | if (attr) |
18491 | { | |
e7c27a73 | 18492 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 18493 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 18494 | if (!suppress_add) |
34eaf542 TT |
18495 | { |
18496 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 18497 | list_to_add = &global_symbols; |
34eaf542 | 18498 | else |
e37fd15a | 18499 | list_to_add = cu->list_in_scope; |
34eaf542 | 18500 | } |
c906108c SS |
18501 | break; |
18502 | } | |
e142c38c | 18503 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18504 | if (attr) |
18505 | { | |
e7c27a73 | 18506 | var_decode_location (attr, sym, cu); |
e142c38c | 18507 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
18508 | |
18509 | /* Fortran explicitly imports any global symbols to the local | |
18510 | scope by DW_TAG_common_block. */ | |
18511 | if (cu->language == language_fortran && die->parent | |
18512 | && die->parent->tag == DW_TAG_common_block) | |
18513 | attr2 = NULL; | |
18514 | ||
caac4577 JG |
18515 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
18516 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
18517 | && !dwarf2_per_objfile->has_section_at_zero) | |
18518 | { | |
18519 | /* When a static variable is eliminated by the linker, | |
18520 | the corresponding debug information is not stripped | |
18521 | out, but the variable address is set to null; | |
18522 | do not add such variables into symbol table. */ | |
18523 | } | |
18524 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 18525 | { |
f55ee35c JK |
18526 | /* Workaround gfortran PR debug/40040 - it uses |
18527 | DW_AT_location for variables in -fPIC libraries which may | |
18528 | get overriden by other libraries/executable and get | |
18529 | a different address. Resolve it by the minimal symbol | |
18530 | which may come from inferior's executable using copy | |
18531 | relocation. Make this workaround only for gfortran as for | |
18532 | other compilers GDB cannot guess the minimal symbol | |
18533 | Fortran mangling kind. */ | |
18534 | if (cu->language == language_fortran && die->parent | |
18535 | && die->parent->tag == DW_TAG_module | |
18536 | && cu->producer | |
28586665 | 18537 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 18538 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 18539 | |
1c809c68 TT |
18540 | /* A variable with DW_AT_external is never static, |
18541 | but it may be block-scoped. */ | |
18542 | list_to_add = (cu->list_in_scope == &file_symbols | |
18543 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 18544 | } |
c906108c | 18545 | else |
e37fd15a | 18546 | list_to_add = cu->list_in_scope; |
c906108c SS |
18547 | } |
18548 | else | |
18549 | { | |
18550 | /* We do not know the address of this symbol. | |
c5aa993b JM |
18551 | If it is an external symbol and we have type information |
18552 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
18553 | The address of the variable will then be determined from | |
18554 | the minimal symbol table whenever the variable is | |
18555 | referenced. */ | |
e142c38c | 18556 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
18557 | |
18558 | /* Fortran explicitly imports any global symbols to the local | |
18559 | scope by DW_TAG_common_block. */ | |
18560 | if (cu->language == language_fortran && die->parent | |
18561 | && die->parent->tag == DW_TAG_common_block) | |
18562 | { | |
18563 | /* SYMBOL_CLASS doesn't matter here because | |
18564 | read_common_block is going to reset it. */ | |
18565 | if (!suppress_add) | |
18566 | list_to_add = cu->list_in_scope; | |
18567 | } | |
18568 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
18569 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 18570 | { |
0fe7935b DJ |
18571 | /* A variable with DW_AT_external is never static, but it |
18572 | may be block-scoped. */ | |
18573 | list_to_add = (cu->list_in_scope == &file_symbols | |
18574 | ? &global_symbols : cu->list_in_scope); | |
18575 | ||
f1e6e072 | 18576 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 18577 | } |
442ddf59 JK |
18578 | else if (!die_is_declaration (die, cu)) |
18579 | { | |
18580 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
18581 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
18582 | if (!suppress_add) |
18583 | list_to_add = cu->list_in_scope; | |
442ddf59 | 18584 | } |
c906108c SS |
18585 | } |
18586 | break; | |
18587 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
18588 | /* If we are inside a function, mark this as an argument. If |
18589 | not, we might be looking at an argument to an inlined function | |
18590 | when we do not have enough information to show inlined frames; | |
18591 | pretend it's a local variable in that case so that the user can | |
18592 | still see it. */ | |
18593 | if (context_stack_depth > 0 | |
18594 | && context_stack[context_stack_depth - 1].name != NULL) | |
18595 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 18596 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18597 | if (attr) |
18598 | { | |
e7c27a73 | 18599 | var_decode_location (attr, sym, cu); |
c906108c | 18600 | } |
e142c38c | 18601 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18602 | if (attr) |
18603 | { | |
e7c27a73 | 18604 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18605 | } |
f346a30d | 18606 | |
e37fd15a | 18607 | list_to_add = cu->list_in_scope; |
c906108c SS |
18608 | break; |
18609 | case DW_TAG_unspecified_parameters: | |
18610 | /* From varargs functions; gdb doesn't seem to have any | |
18611 | interest in this information, so just ignore it for now. | |
18612 | (FIXME?) */ | |
18613 | break; | |
34eaf542 TT |
18614 | case DW_TAG_template_type_param: |
18615 | suppress_add = 1; | |
18616 | /* Fall through. */ | |
c906108c | 18617 | case DW_TAG_class_type: |
680b30c7 | 18618 | case DW_TAG_interface_type: |
c906108c SS |
18619 | case DW_TAG_structure_type: |
18620 | case DW_TAG_union_type: | |
72019c9c | 18621 | case DW_TAG_set_type: |
c906108c | 18622 | case DW_TAG_enumeration_type: |
f1e6e072 | 18623 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18624 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 18625 | |
63d06c5c | 18626 | { |
987504bb | 18627 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
18628 | really ever be static objects: otherwise, if you try |
18629 | to, say, break of a class's method and you're in a file | |
18630 | which doesn't mention that class, it won't work unless | |
18631 | the check for all static symbols in lookup_symbol_aux | |
18632 | saves you. See the OtherFileClass tests in | |
18633 | gdb.c++/namespace.exp. */ | |
18634 | ||
e37fd15a | 18635 | if (!suppress_add) |
34eaf542 | 18636 | { |
34eaf542 TT |
18637 | list_to_add = (cu->list_in_scope == &file_symbols |
18638 | && (cu->language == language_cplus | |
18639 | || cu->language == language_java) | |
18640 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 18641 | |
64382290 TT |
18642 | /* The semantics of C++ state that "struct foo { |
18643 | ... }" also defines a typedef for "foo". A Java | |
18644 | class declaration also defines a typedef for the | |
18645 | class. */ | |
18646 | if (cu->language == language_cplus | |
18647 | || cu->language == language_java | |
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 |
987504bb JJ |
18683 | && (cu->language == language_cplus |
18684 | || cu->language == language_java) | |
e142c38c | 18685 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 18686 | } |
c906108c | 18687 | break; |
74921315 | 18688 | case DW_TAG_imported_declaration: |
5c4e30ca | 18689 | case DW_TAG_namespace: |
f1e6e072 | 18690 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 18691 | list_to_add = &global_symbols; |
5c4e30ca | 18692 | break; |
530e8392 KB |
18693 | case DW_TAG_module: |
18694 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
18695 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
18696 | list_to_add = &global_symbols; | |
18697 | break; | |
4357ac6c | 18698 | case DW_TAG_common_block: |
f1e6e072 | 18699 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
18700 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
18701 | add_symbol_to_list (sym, cu->list_in_scope); | |
18702 | break; | |
c906108c SS |
18703 | default: |
18704 | /* Not a tag we recognize. Hopefully we aren't processing | |
18705 | trash data, but since we must specifically ignore things | |
18706 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 18707 | this point. */ |
e2e0b3e5 | 18708 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 18709 | dwarf_tag_name (die->tag)); |
c906108c SS |
18710 | break; |
18711 | } | |
df8a16a1 | 18712 | |
e37fd15a SW |
18713 | if (suppress_add) |
18714 | { | |
18715 | sym->hash_next = objfile->template_symbols; | |
18716 | objfile->template_symbols = sym; | |
18717 | list_to_add = NULL; | |
18718 | } | |
18719 | ||
18720 | if (list_to_add != NULL) | |
18721 | add_symbol_to_list (sym, list_to_add); | |
18722 | ||
df8a16a1 DJ |
18723 | /* For the benefit of old versions of GCC, check for anonymous |
18724 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 18725 | if (!cu->processing_has_namespace_info |
94af9270 | 18726 | && cu->language == language_cplus) |
a10964d1 | 18727 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
18728 | } |
18729 | return (sym); | |
18730 | } | |
18731 | ||
34eaf542 TT |
18732 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
18733 | ||
18734 | static struct symbol * | |
18735 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
18736 | { | |
18737 | return new_symbol_full (die, type, cu, NULL); | |
18738 | } | |
18739 | ||
98bfdba5 PA |
18740 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
18741 | zero-extend it as appropriate for the symbol's type. The DWARF | |
18742 | standard (v4) is not entirely clear about the meaning of using | |
18743 | DW_FORM_dataN for a constant with a signed type, where the type is | |
18744 | wider than the data. The conclusion of a discussion on the DWARF | |
18745 | list was that this is unspecified. We choose to always zero-extend | |
18746 | because that is the interpretation long in use by GCC. */ | |
c906108c | 18747 | |
98bfdba5 | 18748 | static gdb_byte * |
ff39bb5e | 18749 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 18750 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 18751 | { |
e7c27a73 | 18752 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
18753 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
18754 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
18755 | LONGEST l = DW_UNSND (attr); |
18756 | ||
18757 | if (bits < sizeof (*value) * 8) | |
18758 | { | |
18759 | l &= ((LONGEST) 1 << bits) - 1; | |
18760 | *value = l; | |
18761 | } | |
18762 | else if (bits == sizeof (*value) * 8) | |
18763 | *value = l; | |
18764 | else | |
18765 | { | |
224c3ddb | 18766 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
18767 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
18768 | return bytes; | |
18769 | } | |
18770 | ||
18771 | return NULL; | |
18772 | } | |
18773 | ||
18774 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
18775 | the value does not fit in *VALUE, set *BYTES - either already | |
18776 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
18777 | or, set *BATON, if we translated the constant to a location | |
18778 | expression. */ | |
18779 | ||
18780 | static void | |
ff39bb5e | 18781 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
18782 | const char *name, struct obstack *obstack, |
18783 | struct dwarf2_cu *cu, | |
d521ce57 | 18784 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
18785 | struct dwarf2_locexpr_baton **baton) |
18786 | { | |
18787 | struct objfile *objfile = cu->objfile; | |
18788 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 18789 | struct dwarf_block *blk; |
98bfdba5 PA |
18790 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
18791 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
18792 | ||
18793 | *value = 0; | |
18794 | *bytes = NULL; | |
18795 | *baton = NULL; | |
c906108c SS |
18796 | |
18797 | switch (attr->form) | |
18798 | { | |
18799 | case DW_FORM_addr: | |
3019eac3 | 18800 | case DW_FORM_GNU_addr_index: |
ac56253d | 18801 | { |
ac56253d TT |
18802 | gdb_byte *data; |
18803 | ||
98bfdba5 PA |
18804 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
18805 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 18806 | cu_header->addr_size, |
98bfdba5 | 18807 | TYPE_LENGTH (type)); |
ac56253d TT |
18808 | /* Symbols of this form are reasonably rare, so we just |
18809 | piggyback on the existing location code rather than writing | |
18810 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 18811 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
18812 | (*baton)->per_cu = cu->per_cu; |
18813 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 18814 | |
98bfdba5 | 18815 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 18816 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 18817 | (*baton)->data = data; |
ac56253d TT |
18818 | |
18819 | data[0] = DW_OP_addr; | |
18820 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
18821 | byte_order, DW_ADDR (attr)); | |
18822 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 18823 | } |
c906108c | 18824 | break; |
4ac36638 | 18825 | case DW_FORM_string: |
93b5768b | 18826 | case DW_FORM_strp: |
3019eac3 | 18827 | case DW_FORM_GNU_str_index: |
36586728 | 18828 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
18829 | /* DW_STRING is already allocated on the objfile obstack, point |
18830 | directly to it. */ | |
d521ce57 | 18831 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 18832 | break; |
c906108c SS |
18833 | case DW_FORM_block1: |
18834 | case DW_FORM_block2: | |
18835 | case DW_FORM_block4: | |
18836 | case DW_FORM_block: | |
2dc7f7b3 | 18837 | case DW_FORM_exprloc: |
c906108c | 18838 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
18839 | if (TYPE_LENGTH (type) != blk->size) |
18840 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
18841 | TYPE_LENGTH (type)); | |
18842 | *bytes = blk->data; | |
c906108c | 18843 | break; |
2df3850c JM |
18844 | |
18845 | /* The DW_AT_const_value attributes are supposed to carry the | |
18846 | symbol's value "represented as it would be on the target | |
18847 | architecture." By the time we get here, it's already been | |
18848 | converted to host endianness, so we just need to sign- or | |
18849 | zero-extend it as appropriate. */ | |
18850 | case DW_FORM_data1: | |
3aef2284 | 18851 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 18852 | break; |
c906108c | 18853 | case DW_FORM_data2: |
3aef2284 | 18854 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 18855 | break; |
c906108c | 18856 | case DW_FORM_data4: |
3aef2284 | 18857 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 18858 | break; |
c906108c | 18859 | case DW_FORM_data8: |
3aef2284 | 18860 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
18861 | break; |
18862 | ||
c906108c | 18863 | case DW_FORM_sdata: |
98bfdba5 | 18864 | *value = DW_SND (attr); |
2df3850c JM |
18865 | break; |
18866 | ||
c906108c | 18867 | case DW_FORM_udata: |
98bfdba5 | 18868 | *value = DW_UNSND (attr); |
c906108c | 18869 | break; |
2df3850c | 18870 | |
c906108c | 18871 | default: |
4d3c2250 | 18872 | complaint (&symfile_complaints, |
e2e0b3e5 | 18873 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 18874 | dwarf_form_name (attr->form)); |
98bfdba5 | 18875 | *value = 0; |
c906108c SS |
18876 | break; |
18877 | } | |
18878 | } | |
18879 | ||
2df3850c | 18880 | |
98bfdba5 PA |
18881 | /* Copy constant value from an attribute to a symbol. */ |
18882 | ||
2df3850c | 18883 | static void |
ff39bb5e | 18884 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 18885 | struct dwarf2_cu *cu) |
2df3850c | 18886 | { |
98bfdba5 | 18887 | struct objfile *objfile = cu->objfile; |
12df843f | 18888 | LONGEST value; |
d521ce57 | 18889 | const gdb_byte *bytes; |
98bfdba5 | 18890 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 18891 | |
98bfdba5 PA |
18892 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
18893 | SYMBOL_PRINT_NAME (sym), | |
18894 | &objfile->objfile_obstack, cu, | |
18895 | &value, &bytes, &baton); | |
2df3850c | 18896 | |
98bfdba5 PA |
18897 | if (baton != NULL) |
18898 | { | |
98bfdba5 | 18899 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 18900 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
18901 | } |
18902 | else if (bytes != NULL) | |
18903 | { | |
18904 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 18905 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
18906 | } |
18907 | else | |
18908 | { | |
18909 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 18910 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 18911 | } |
2df3850c JM |
18912 | } |
18913 | ||
c906108c SS |
18914 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
18915 | ||
18916 | static struct type * | |
e7c27a73 | 18917 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18918 | { |
c906108c | 18919 | struct attribute *type_attr; |
c906108c | 18920 | |
e142c38c | 18921 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
18922 | if (!type_attr) |
18923 | { | |
18924 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 18925 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 18926 | } |
348e048f | 18927 | |
673bfd45 | 18928 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18929 | } |
18930 | ||
b4ba55a1 JB |
18931 | /* True iff CU's producer generates GNAT Ada auxiliary information |
18932 | that allows to find parallel types through that information instead | |
18933 | of having to do expensive parallel lookups by type name. */ | |
18934 | ||
18935 | static int | |
18936 | need_gnat_info (struct dwarf2_cu *cu) | |
18937 | { | |
18938 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
18939 | of GNAT produces this auxiliary information, without any indication | |
18940 | that it is produced. Part of enhancing the FSF version of GNAT | |
18941 | to produce that information will be to put in place an indicator | |
18942 | that we can use in order to determine whether the descriptive type | |
18943 | info is available or not. One suggestion that has been made is | |
18944 | to use a new attribute, attached to the CU die. For now, assume | |
18945 | that the descriptive type info is not available. */ | |
18946 | return 0; | |
18947 | } | |
18948 | ||
b4ba55a1 JB |
18949 | /* Return the auxiliary type of the die in question using its |
18950 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
18951 | attribute is not present. */ | |
18952 | ||
18953 | static struct type * | |
18954 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
18955 | { | |
b4ba55a1 | 18956 | struct attribute *type_attr; |
b4ba55a1 JB |
18957 | |
18958 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
18959 | if (!type_attr) | |
18960 | return NULL; | |
18961 | ||
673bfd45 | 18962 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
18963 | } |
18964 | ||
18965 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
18966 | descriptive type accordingly. */ | |
18967 | ||
18968 | static void | |
18969 | set_descriptive_type (struct type *type, struct die_info *die, | |
18970 | struct dwarf2_cu *cu) | |
18971 | { | |
18972 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
18973 | ||
18974 | if (descriptive_type) | |
18975 | { | |
18976 | ALLOCATE_GNAT_AUX_TYPE (type); | |
18977 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
18978 | } | |
18979 | } | |
18980 | ||
c906108c SS |
18981 | /* Return the containing type of the die in question using its |
18982 | DW_AT_containing_type attribute. */ | |
18983 | ||
18984 | static struct type * | |
e7c27a73 | 18985 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18986 | { |
c906108c | 18987 | struct attribute *type_attr; |
c906108c | 18988 | |
e142c38c | 18989 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
18990 | if (!type_attr) |
18991 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 18992 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 18993 | |
673bfd45 | 18994 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18995 | } |
18996 | ||
ac9ec31b DE |
18997 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
18998 | ||
18999 | static struct type * | |
19000 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
19001 | { | |
19002 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19003 | char *message, *saved; | |
19004 | ||
19005 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 19006 | objfile_name (objfile), |
ac9ec31b DE |
19007 | cu->header.offset.sect_off, |
19008 | die->offset.sect_off); | |
224c3ddb SM |
19009 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
19010 | message, strlen (message)); | |
ac9ec31b DE |
19011 | xfree (message); |
19012 | ||
19013 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
19014 | } | |
19015 | ||
673bfd45 | 19016 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
19017 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
19018 | DW_AT_containing_type. | |
673bfd45 DE |
19019 | If there is no type substitute an error marker. */ |
19020 | ||
c906108c | 19021 | static struct type * |
ff39bb5e | 19022 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 19023 | struct dwarf2_cu *cu) |
c906108c | 19024 | { |
bb5ed363 | 19025 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
19026 | struct type *this_type; |
19027 | ||
ac9ec31b DE |
19028 | gdb_assert (attr->name == DW_AT_type |
19029 | || attr->name == DW_AT_GNAT_descriptive_type | |
19030 | || attr->name == DW_AT_containing_type); | |
19031 | ||
673bfd45 DE |
19032 | /* First see if we have it cached. */ |
19033 | ||
36586728 TT |
19034 | if (attr->form == DW_FORM_GNU_ref_alt) |
19035 | { | |
19036 | struct dwarf2_per_cu_data *per_cu; | |
19037 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
19038 | ||
19039 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
19040 | this_type = get_die_type_at_offset (offset, per_cu); | |
19041 | } | |
7771576e | 19042 | else if (attr_form_is_ref (attr)) |
673bfd45 | 19043 | { |
b64f50a1 | 19044 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
19045 | |
19046 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
19047 | } | |
55f1336d | 19048 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 19049 | { |
ac9ec31b | 19050 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 19051 | |
ac9ec31b | 19052 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
19053 | } |
19054 | else | |
19055 | { | |
ac9ec31b DE |
19056 | complaint (&symfile_complaints, |
19057 | _("Dwarf Error: Bad type attribute %s in DIE" | |
19058 | " at 0x%x [in module %s]"), | |
19059 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 19060 | objfile_name (objfile)); |
ac9ec31b | 19061 | return build_error_marker_type (cu, die); |
673bfd45 DE |
19062 | } |
19063 | ||
19064 | /* If not cached we need to read it in. */ | |
19065 | ||
19066 | if (this_type == NULL) | |
19067 | { | |
ac9ec31b | 19068 | struct die_info *type_die = NULL; |
673bfd45 DE |
19069 | struct dwarf2_cu *type_cu = cu; |
19070 | ||
7771576e | 19071 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19072 | type_die = follow_die_ref (die, attr, &type_cu); |
19073 | if (type_die == NULL) | |
19074 | return build_error_marker_type (cu, die); | |
19075 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
19076 | from an inter-CU reference and the type's CU got expanded before |
19077 | ours. */ | |
ac9ec31b | 19078 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
19079 | } |
19080 | ||
19081 | /* If we still don't have a type use an error marker. */ | |
19082 | ||
19083 | if (this_type == NULL) | |
ac9ec31b | 19084 | return build_error_marker_type (cu, die); |
673bfd45 | 19085 | |
f792889a | 19086 | return this_type; |
c906108c SS |
19087 | } |
19088 | ||
673bfd45 DE |
19089 | /* Return the type in DIE, CU. |
19090 | Returns NULL for invalid types. | |
19091 | ||
02142a6c | 19092 | This first does a lookup in die_type_hash, |
673bfd45 DE |
19093 | and only reads the die in if necessary. |
19094 | ||
19095 | NOTE: This can be called when reading in partial or full symbols. */ | |
19096 | ||
f792889a | 19097 | static struct type * |
e7c27a73 | 19098 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19099 | { |
f792889a DJ |
19100 | struct type *this_type; |
19101 | ||
19102 | this_type = get_die_type (die, cu); | |
19103 | if (this_type) | |
19104 | return this_type; | |
19105 | ||
673bfd45 DE |
19106 | return read_type_die_1 (die, cu); |
19107 | } | |
19108 | ||
19109 | /* Read the type in DIE, CU. | |
19110 | Returns NULL for invalid types. */ | |
19111 | ||
19112 | static struct type * | |
19113 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
19114 | { | |
19115 | struct type *this_type = NULL; | |
19116 | ||
c906108c SS |
19117 | switch (die->tag) |
19118 | { | |
19119 | case DW_TAG_class_type: | |
680b30c7 | 19120 | case DW_TAG_interface_type: |
c906108c SS |
19121 | case DW_TAG_structure_type: |
19122 | case DW_TAG_union_type: | |
f792889a | 19123 | this_type = read_structure_type (die, cu); |
c906108c SS |
19124 | break; |
19125 | case DW_TAG_enumeration_type: | |
f792889a | 19126 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
19127 | break; |
19128 | case DW_TAG_subprogram: | |
19129 | case DW_TAG_subroutine_type: | |
edb3359d | 19130 | case DW_TAG_inlined_subroutine: |
f792889a | 19131 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
19132 | break; |
19133 | case DW_TAG_array_type: | |
f792889a | 19134 | this_type = read_array_type (die, cu); |
c906108c | 19135 | break; |
72019c9c | 19136 | case DW_TAG_set_type: |
f792889a | 19137 | this_type = read_set_type (die, cu); |
72019c9c | 19138 | break; |
c906108c | 19139 | case DW_TAG_pointer_type: |
f792889a | 19140 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
19141 | break; |
19142 | case DW_TAG_ptr_to_member_type: | |
f792889a | 19143 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
19144 | break; |
19145 | case DW_TAG_reference_type: | |
f792889a | 19146 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
19147 | break; |
19148 | case DW_TAG_const_type: | |
f792889a | 19149 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
19150 | break; |
19151 | case DW_TAG_volatile_type: | |
f792889a | 19152 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 19153 | break; |
06d66ee9 TT |
19154 | case DW_TAG_restrict_type: |
19155 | this_type = read_tag_restrict_type (die, cu); | |
19156 | break; | |
c906108c | 19157 | case DW_TAG_string_type: |
f792889a | 19158 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
19159 | break; |
19160 | case DW_TAG_typedef: | |
f792889a | 19161 | this_type = read_typedef (die, cu); |
c906108c | 19162 | break; |
a02abb62 | 19163 | case DW_TAG_subrange_type: |
f792889a | 19164 | this_type = read_subrange_type (die, cu); |
a02abb62 | 19165 | break; |
c906108c | 19166 | case DW_TAG_base_type: |
f792889a | 19167 | this_type = read_base_type (die, cu); |
c906108c | 19168 | break; |
81a17f79 | 19169 | case DW_TAG_unspecified_type: |
f792889a | 19170 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 19171 | break; |
0114d602 DJ |
19172 | case DW_TAG_namespace: |
19173 | this_type = read_namespace_type (die, cu); | |
19174 | break; | |
f55ee35c JK |
19175 | case DW_TAG_module: |
19176 | this_type = read_module_type (die, cu); | |
19177 | break; | |
a2c2acaf MW |
19178 | case DW_TAG_atomic_type: |
19179 | this_type = read_tag_atomic_type (die, cu); | |
19180 | break; | |
c906108c | 19181 | default: |
3e43a32a MS |
19182 | complaint (&symfile_complaints, |
19183 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 19184 | dwarf_tag_name (die->tag)); |
c906108c SS |
19185 | break; |
19186 | } | |
63d06c5c | 19187 | |
f792889a | 19188 | return this_type; |
63d06c5c DC |
19189 | } |
19190 | ||
abc72ce4 DE |
19191 | /* See if we can figure out if the class lives in a namespace. We do |
19192 | this by looking for a member function; its demangled name will | |
19193 | contain namespace info, if there is any. | |
19194 | Return the computed name or NULL. | |
19195 | Space for the result is allocated on the objfile's obstack. | |
19196 | This is the full-die version of guess_partial_die_structure_name. | |
19197 | In this case we know DIE has no useful parent. */ | |
19198 | ||
19199 | static char * | |
19200 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
19201 | { | |
19202 | struct die_info *spec_die; | |
19203 | struct dwarf2_cu *spec_cu; | |
19204 | struct die_info *child; | |
19205 | ||
19206 | spec_cu = cu; | |
19207 | spec_die = die_specification (die, &spec_cu); | |
19208 | if (spec_die != NULL) | |
19209 | { | |
19210 | die = spec_die; | |
19211 | cu = spec_cu; | |
19212 | } | |
19213 | ||
19214 | for (child = die->child; | |
19215 | child != NULL; | |
19216 | child = child->sibling) | |
19217 | { | |
19218 | if (child->tag == DW_TAG_subprogram) | |
19219 | { | |
7d45c7c3 | 19220 | const char *linkage_name; |
abc72ce4 | 19221 | |
7d45c7c3 KB |
19222 | linkage_name = dwarf2_string_attr (child, DW_AT_linkage_name, cu); |
19223 | if (linkage_name == NULL) | |
19224 | linkage_name = dwarf2_string_attr (child, DW_AT_MIPS_linkage_name, | |
19225 | cu); | |
19226 | if (linkage_name != NULL) | |
abc72ce4 DE |
19227 | { |
19228 | char *actual_name | |
19229 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 19230 | linkage_name); |
abc72ce4 DE |
19231 | char *name = NULL; |
19232 | ||
19233 | if (actual_name != NULL) | |
19234 | { | |
15d034d0 | 19235 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
19236 | |
19237 | if (die_name != NULL | |
19238 | && strcmp (die_name, actual_name) != 0) | |
19239 | { | |
19240 | /* Strip off the class name from the full name. | |
19241 | We want the prefix. */ | |
19242 | int die_name_len = strlen (die_name); | |
19243 | int actual_name_len = strlen (actual_name); | |
19244 | ||
19245 | /* Test for '::' as a sanity check. */ | |
19246 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
19247 | && actual_name[actual_name_len |
19248 | - die_name_len - 1] == ':') | |
224c3ddb SM |
19249 | name = (char *) obstack_copy0 ( |
19250 | &cu->objfile->per_bfd->storage_obstack, | |
19251 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
19252 | } |
19253 | } | |
19254 | xfree (actual_name); | |
19255 | return name; | |
19256 | } | |
19257 | } | |
19258 | } | |
19259 | ||
19260 | return NULL; | |
19261 | } | |
19262 | ||
96408a79 SA |
19263 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
19264 | prefix part in such case. See | |
19265 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19266 | ||
19267 | static char * | |
19268 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
19269 | { | |
19270 | struct attribute *attr; | |
e6a959d6 | 19271 | const char *base; |
96408a79 SA |
19272 | |
19273 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
19274 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
19275 | return NULL; | |
19276 | ||
7d45c7c3 | 19277 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
19278 | return NULL; |
19279 | ||
19280 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19281 | if (attr == NULL) | |
19282 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19283 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19284 | return NULL; | |
19285 | ||
19286 | /* dwarf2_name had to be already called. */ | |
19287 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
19288 | ||
19289 | /* Strip the base name, keep any leading namespaces/classes. */ | |
19290 | base = strrchr (DW_STRING (attr), ':'); | |
19291 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
19292 | return ""; | |
19293 | ||
224c3ddb SM |
19294 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
19295 | DW_STRING (attr), | |
19296 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
19297 | } |
19298 | ||
fdde2d81 | 19299 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 19300 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 19301 | |
0114d602 DJ |
19302 | For example, if we're within the method foo() in the following |
19303 | code: | |
19304 | ||
19305 | namespace N { | |
19306 | class C { | |
19307 | void foo () { | |
19308 | } | |
19309 | }; | |
19310 | } | |
19311 | ||
19312 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 19313 | |
0d5cff50 | 19314 | static const char * |
e142c38c | 19315 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 19316 | { |
0114d602 DJ |
19317 | struct die_info *parent, *spec_die; |
19318 | struct dwarf2_cu *spec_cu; | |
19319 | struct type *parent_type; | |
96408a79 | 19320 | char *retval; |
63d06c5c | 19321 | |
f55ee35c | 19322 | if (cu->language != language_cplus && cu->language != language_java |
c44af4eb TT |
19323 | && cu->language != language_fortran && cu->language != language_d |
19324 | && cu->language != language_rust) | |
0114d602 DJ |
19325 | return ""; |
19326 | ||
96408a79 SA |
19327 | retval = anonymous_struct_prefix (die, cu); |
19328 | if (retval) | |
19329 | return retval; | |
19330 | ||
0114d602 DJ |
19331 | /* We have to be careful in the presence of DW_AT_specification. |
19332 | For example, with GCC 3.4, given the code | |
19333 | ||
19334 | namespace N { | |
19335 | void foo() { | |
19336 | // Definition of N::foo. | |
19337 | } | |
19338 | } | |
19339 | ||
19340 | then we'll have a tree of DIEs like this: | |
19341 | ||
19342 | 1: DW_TAG_compile_unit | |
19343 | 2: DW_TAG_namespace // N | |
19344 | 3: DW_TAG_subprogram // declaration of N::foo | |
19345 | 4: DW_TAG_subprogram // definition of N::foo | |
19346 | DW_AT_specification // refers to die #3 | |
19347 | ||
19348 | Thus, when processing die #4, we have to pretend that we're in | |
19349 | the context of its DW_AT_specification, namely the contex of die | |
19350 | #3. */ | |
19351 | spec_cu = cu; | |
19352 | spec_die = die_specification (die, &spec_cu); | |
19353 | if (spec_die == NULL) | |
19354 | parent = die->parent; | |
19355 | else | |
63d06c5c | 19356 | { |
0114d602 DJ |
19357 | parent = spec_die->parent; |
19358 | cu = spec_cu; | |
63d06c5c | 19359 | } |
0114d602 DJ |
19360 | |
19361 | if (parent == NULL) | |
19362 | return ""; | |
98bfdba5 PA |
19363 | else if (parent->building_fullname) |
19364 | { | |
19365 | const char *name; | |
19366 | const char *parent_name; | |
19367 | ||
19368 | /* It has been seen on RealView 2.2 built binaries, | |
19369 | DW_TAG_template_type_param types actually _defined_ as | |
19370 | children of the parent class: | |
19371 | ||
19372 | enum E {}; | |
19373 | template class <class Enum> Class{}; | |
19374 | Class<enum E> class_e; | |
19375 | ||
19376 | 1: DW_TAG_class_type (Class) | |
19377 | 2: DW_TAG_enumeration_type (E) | |
19378 | 3: DW_TAG_enumerator (enum1:0) | |
19379 | 3: DW_TAG_enumerator (enum2:1) | |
19380 | ... | |
19381 | 2: DW_TAG_template_type_param | |
19382 | DW_AT_type DW_FORM_ref_udata (E) | |
19383 | ||
19384 | Besides being broken debug info, it can put GDB into an | |
19385 | infinite loop. Consider: | |
19386 | ||
19387 | When we're building the full name for Class<E>, we'll start | |
19388 | at Class, and go look over its template type parameters, | |
19389 | finding E. We'll then try to build the full name of E, and | |
19390 | reach here. We're now trying to build the full name of E, | |
19391 | and look over the parent DIE for containing scope. In the | |
19392 | broken case, if we followed the parent DIE of E, we'd again | |
19393 | find Class, and once again go look at its template type | |
19394 | arguments, etc., etc. Simply don't consider such parent die | |
19395 | as source-level parent of this die (it can't be, the language | |
19396 | doesn't allow it), and break the loop here. */ | |
19397 | name = dwarf2_name (die, cu); | |
19398 | parent_name = dwarf2_name (parent, cu); | |
19399 | complaint (&symfile_complaints, | |
19400 | _("template param type '%s' defined within parent '%s'"), | |
19401 | name ? name : "<unknown>", | |
19402 | parent_name ? parent_name : "<unknown>"); | |
19403 | return ""; | |
19404 | } | |
63d06c5c | 19405 | else |
0114d602 DJ |
19406 | switch (parent->tag) |
19407 | { | |
63d06c5c | 19408 | case DW_TAG_namespace: |
0114d602 | 19409 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
19410 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
19411 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
19412 | Work around this problem here. */ | |
19413 | if (cu->language == language_cplus | |
19414 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
19415 | return ""; | |
0114d602 DJ |
19416 | /* We give a name to even anonymous namespaces. */ |
19417 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 19418 | case DW_TAG_class_type: |
680b30c7 | 19419 | case DW_TAG_interface_type: |
63d06c5c | 19420 | case DW_TAG_structure_type: |
0114d602 | 19421 | case DW_TAG_union_type: |
f55ee35c | 19422 | case DW_TAG_module: |
0114d602 DJ |
19423 | parent_type = read_type_die (parent, cu); |
19424 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
19425 | return TYPE_TAG_NAME (parent_type); | |
19426 | else | |
19427 | /* An anonymous structure is only allowed non-static data | |
19428 | members; no typedefs, no member functions, et cetera. | |
19429 | So it does not need a prefix. */ | |
19430 | return ""; | |
abc72ce4 | 19431 | case DW_TAG_compile_unit: |
95554aad | 19432 | case DW_TAG_partial_unit: |
abc72ce4 DE |
19433 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
19434 | if (cu->language == language_cplus | |
8b70b953 | 19435 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
19436 | && die->child != NULL |
19437 | && (die->tag == DW_TAG_class_type | |
19438 | || die->tag == DW_TAG_structure_type | |
19439 | || die->tag == DW_TAG_union_type)) | |
19440 | { | |
19441 | char *name = guess_full_die_structure_name (die, cu); | |
19442 | if (name != NULL) | |
19443 | return name; | |
19444 | } | |
19445 | return ""; | |
3d567982 TT |
19446 | case DW_TAG_enumeration_type: |
19447 | parent_type = read_type_die (parent, cu); | |
19448 | if (TYPE_DECLARED_CLASS (parent_type)) | |
19449 | { | |
19450 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
19451 | return TYPE_TAG_NAME (parent_type); | |
19452 | return ""; | |
19453 | } | |
19454 | /* Fall through. */ | |
63d06c5c | 19455 | default: |
8176b9b8 | 19456 | return determine_prefix (parent, cu); |
63d06c5c | 19457 | } |
63d06c5c DC |
19458 | } |
19459 | ||
3e43a32a MS |
19460 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
19461 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
19462 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
19463 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
19464 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 19465 | |
f55ee35c | 19466 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
19467 | |
19468 | static char * | |
f55ee35c JK |
19469 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
19470 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 19471 | { |
f55ee35c | 19472 | const char *lead = ""; |
5c315b68 | 19473 | const char *sep; |
63d06c5c | 19474 | |
3e43a32a MS |
19475 | if (suffix == NULL || suffix[0] == '\0' |
19476 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
19477 | sep = ""; |
19478 | else if (cu->language == language_java) | |
19479 | sep = "."; | |
45280282 IB |
19480 | else if (cu->language == language_d) |
19481 | { | |
19482 | /* For D, the 'main' function could be defined in any module, but it | |
19483 | should never be prefixed. */ | |
19484 | if (strcmp (suffix, "D main") == 0) | |
19485 | { | |
19486 | prefix = ""; | |
19487 | sep = ""; | |
19488 | } | |
19489 | else | |
19490 | sep = "."; | |
19491 | } | |
f55ee35c JK |
19492 | else if (cu->language == language_fortran && physname) |
19493 | { | |
19494 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
19495 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
19496 | ||
19497 | lead = "__"; | |
19498 | sep = "_MOD_"; | |
19499 | } | |
987504bb JJ |
19500 | else |
19501 | sep = "::"; | |
63d06c5c | 19502 | |
6dd47d34 DE |
19503 | if (prefix == NULL) |
19504 | prefix = ""; | |
19505 | if (suffix == NULL) | |
19506 | suffix = ""; | |
19507 | ||
987504bb JJ |
19508 | if (obs == NULL) |
19509 | { | |
3e43a32a | 19510 | char *retval |
224c3ddb SM |
19511 | = ((char *) |
19512 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 19513 | |
f55ee35c JK |
19514 | strcpy (retval, lead); |
19515 | strcat (retval, prefix); | |
6dd47d34 DE |
19516 | strcat (retval, sep); |
19517 | strcat (retval, suffix); | |
63d06c5c DC |
19518 | return retval; |
19519 | } | |
987504bb JJ |
19520 | else |
19521 | { | |
19522 | /* We have an obstack. */ | |
f55ee35c | 19523 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 19524 | } |
63d06c5c DC |
19525 | } |
19526 | ||
c906108c SS |
19527 | /* Return sibling of die, NULL if no sibling. */ |
19528 | ||
f9aca02d | 19529 | static struct die_info * |
fba45db2 | 19530 | sibling_die (struct die_info *die) |
c906108c | 19531 | { |
639d11d3 | 19532 | return die->sibling; |
c906108c SS |
19533 | } |
19534 | ||
71c25dea TT |
19535 | /* Get name of a die, return NULL if not found. */ |
19536 | ||
15d034d0 TT |
19537 | static const char * |
19538 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
19539 | struct obstack *obstack) |
19540 | { | |
19541 | if (name && cu->language == language_cplus) | |
19542 | { | |
19543 | char *canon_name = cp_canonicalize_string (name); | |
19544 | ||
19545 | if (canon_name != NULL) | |
19546 | { | |
19547 | if (strcmp (canon_name, name) != 0) | |
224c3ddb SM |
19548 | name = (const char *) obstack_copy0 (obstack, canon_name, |
19549 | strlen (canon_name)); | |
71c25dea TT |
19550 | xfree (canon_name); |
19551 | } | |
19552 | } | |
19553 | ||
19554 | return name; | |
c906108c SS |
19555 | } |
19556 | ||
96553a0c DE |
19557 | /* Get name of a die, return NULL if not found. |
19558 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 19559 | |
15d034d0 | 19560 | static const char * |
e142c38c | 19561 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
19562 | { |
19563 | struct attribute *attr; | |
19564 | ||
e142c38c | 19565 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 19566 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 19567 | && die->tag != DW_TAG_namespace |
53832f31 TT |
19568 | && die->tag != DW_TAG_class_type |
19569 | && die->tag != DW_TAG_interface_type | |
19570 | && die->tag != DW_TAG_structure_type | |
19571 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
19572 | return NULL; |
19573 | ||
19574 | switch (die->tag) | |
19575 | { | |
19576 | case DW_TAG_compile_unit: | |
95554aad | 19577 | case DW_TAG_partial_unit: |
71c25dea TT |
19578 | /* Compilation units have a DW_AT_name that is a filename, not |
19579 | a source language identifier. */ | |
19580 | case DW_TAG_enumeration_type: | |
19581 | case DW_TAG_enumerator: | |
19582 | /* These tags always have simple identifiers already; no need | |
19583 | to canonicalize them. */ | |
19584 | return DW_STRING (attr); | |
907af001 | 19585 | |
96553a0c DE |
19586 | case DW_TAG_namespace: |
19587 | if (attr != NULL && DW_STRING (attr) != NULL) | |
19588 | return DW_STRING (attr); | |
19589 | return CP_ANONYMOUS_NAMESPACE_STR; | |
19590 | ||
418835cc KS |
19591 | case DW_TAG_subprogram: |
19592 | /* Java constructors will all be named "<init>", so return | |
19593 | the class name when we see this special case. */ | |
19594 | if (cu->language == language_java | |
19595 | && DW_STRING (attr) != NULL | |
19596 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
19597 | { | |
19598 | struct dwarf2_cu *spec_cu = cu; | |
19599 | struct die_info *spec_die; | |
19600 | ||
19601 | /* GCJ will output '<init>' for Java constructor names. | |
19602 | For this special case, return the name of the parent class. */ | |
19603 | ||
cdc07690 | 19604 | /* GCJ may output subprogram DIEs with AT_specification set. |
418835cc KS |
19605 | If so, use the name of the specified DIE. */ |
19606 | spec_die = die_specification (die, &spec_cu); | |
19607 | if (spec_die != NULL) | |
19608 | return dwarf2_name (spec_die, spec_cu); | |
19609 | ||
19610 | do | |
19611 | { | |
19612 | die = die->parent; | |
19613 | if (die->tag == DW_TAG_class_type) | |
19614 | return dwarf2_name (die, cu); | |
19615 | } | |
95554aad TT |
19616 | while (die->tag != DW_TAG_compile_unit |
19617 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 19618 | } |
907af001 UW |
19619 | break; |
19620 | ||
19621 | case DW_TAG_class_type: | |
19622 | case DW_TAG_interface_type: | |
19623 | case DW_TAG_structure_type: | |
19624 | case DW_TAG_union_type: | |
19625 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
19626 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
19627 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
19628 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 19629 | if (attr && DW_STRING (attr) |
61012eef GB |
19630 | && (startswith (DW_STRING (attr), "._") |
19631 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 19632 | return NULL; |
53832f31 TT |
19633 | |
19634 | /* GCC might emit a nameless typedef that has a linkage name. See | |
19635 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19636 | if (!attr || DW_STRING (attr) == NULL) | |
19637 | { | |
df5c6c50 | 19638 | char *demangled = NULL; |
53832f31 TT |
19639 | |
19640 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19641 | if (attr == NULL) | |
19642 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19643 | ||
19644 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19645 | return NULL; | |
19646 | ||
df5c6c50 JK |
19647 | /* Avoid demangling DW_STRING (attr) the second time on a second |
19648 | call for the same DIE. */ | |
19649 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 19650 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
19651 | |
19652 | if (demangled) | |
19653 | { | |
e6a959d6 | 19654 | const char *base; |
96408a79 | 19655 | |
53832f31 | 19656 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 19657 | DW_STRING (attr) |
224c3ddb SM |
19658 | = ((const char *) |
19659 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
19660 | demangled, strlen (demangled))); | |
53832f31 TT |
19661 | DW_STRING_IS_CANONICAL (attr) = 1; |
19662 | xfree (demangled); | |
96408a79 SA |
19663 | |
19664 | /* Strip any leading namespaces/classes, keep only the base name. | |
19665 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
19666 | base = strrchr (DW_STRING (attr), ':'); | |
19667 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
19668 | return &base[1]; | |
19669 | else | |
19670 | return DW_STRING (attr); | |
53832f31 TT |
19671 | } |
19672 | } | |
907af001 UW |
19673 | break; |
19674 | ||
71c25dea | 19675 | default: |
907af001 UW |
19676 | break; |
19677 | } | |
19678 | ||
19679 | if (!DW_STRING_IS_CANONICAL (attr)) | |
19680 | { | |
19681 | DW_STRING (attr) | |
19682 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 19683 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 19684 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 19685 | } |
907af001 | 19686 | return DW_STRING (attr); |
9219021c DC |
19687 | } |
19688 | ||
19689 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
19690 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
19691 | containing the return value on output. */ | |
9219021c DC |
19692 | |
19693 | static struct die_info * | |
f2f0e013 | 19694 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
19695 | { |
19696 | struct attribute *attr; | |
9219021c | 19697 | |
f2f0e013 | 19698 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
19699 | if (attr == NULL) |
19700 | return NULL; | |
19701 | ||
f2f0e013 | 19702 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
19703 | } |
19704 | ||
c906108c SS |
19705 | /* Convert a DIE tag into its string name. */ |
19706 | ||
f39c6ffd | 19707 | static const char * |
aa1ee363 | 19708 | dwarf_tag_name (unsigned tag) |
c906108c | 19709 | { |
f39c6ffd TT |
19710 | const char *name = get_DW_TAG_name (tag); |
19711 | ||
19712 | if (name == NULL) | |
19713 | return "DW_TAG_<unknown>"; | |
19714 | ||
19715 | return name; | |
c906108c SS |
19716 | } |
19717 | ||
19718 | /* Convert a DWARF attribute code into its string name. */ | |
19719 | ||
f39c6ffd | 19720 | static const char * |
aa1ee363 | 19721 | dwarf_attr_name (unsigned attr) |
c906108c | 19722 | { |
f39c6ffd TT |
19723 | const char *name; |
19724 | ||
c764a876 | 19725 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
19726 | if (attr == DW_AT_MIPS_fde) |
19727 | return "DW_AT_MIPS_fde"; | |
19728 | #else | |
19729 | if (attr == DW_AT_HP_block_index) | |
19730 | return "DW_AT_HP_block_index"; | |
c764a876 | 19731 | #endif |
f39c6ffd TT |
19732 | |
19733 | name = get_DW_AT_name (attr); | |
19734 | ||
19735 | if (name == NULL) | |
19736 | return "DW_AT_<unknown>"; | |
19737 | ||
19738 | return name; | |
c906108c SS |
19739 | } |
19740 | ||
19741 | /* Convert a DWARF value form code into its string name. */ | |
19742 | ||
f39c6ffd | 19743 | static const char * |
aa1ee363 | 19744 | dwarf_form_name (unsigned form) |
c906108c | 19745 | { |
f39c6ffd TT |
19746 | const char *name = get_DW_FORM_name (form); |
19747 | ||
19748 | if (name == NULL) | |
19749 | return "DW_FORM_<unknown>"; | |
19750 | ||
19751 | return name; | |
c906108c SS |
19752 | } |
19753 | ||
19754 | static char * | |
fba45db2 | 19755 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
19756 | { |
19757 | if (mybool) | |
19758 | return "TRUE"; | |
19759 | else | |
19760 | return "FALSE"; | |
19761 | } | |
19762 | ||
19763 | /* Convert a DWARF type code into its string name. */ | |
19764 | ||
f39c6ffd | 19765 | static const char * |
aa1ee363 | 19766 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 19767 | { |
f39c6ffd | 19768 | const char *name = get_DW_ATE_name (enc); |
c906108c | 19769 | |
f39c6ffd TT |
19770 | if (name == NULL) |
19771 | return "DW_ATE_<unknown>"; | |
c906108c | 19772 | |
f39c6ffd | 19773 | return name; |
c906108c | 19774 | } |
c906108c | 19775 | |
f9aca02d | 19776 | static void |
d97bc12b | 19777 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
19778 | { |
19779 | unsigned int i; | |
19780 | ||
d97bc12b DE |
19781 | print_spaces (indent, f); |
19782 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 19783 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
19784 | |
19785 | if (die->parent != NULL) | |
19786 | { | |
19787 | print_spaces (indent, f); | |
19788 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 19789 | die->parent->offset.sect_off); |
d97bc12b DE |
19790 | } |
19791 | ||
19792 | print_spaces (indent, f); | |
19793 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 19794 | dwarf_bool_name (die->child != NULL)); |
c906108c | 19795 | |
d97bc12b DE |
19796 | print_spaces (indent, f); |
19797 | fprintf_unfiltered (f, " attributes:\n"); | |
19798 | ||
c906108c SS |
19799 | for (i = 0; i < die->num_attrs; ++i) |
19800 | { | |
d97bc12b DE |
19801 | print_spaces (indent, f); |
19802 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
19803 | dwarf_attr_name (die->attrs[i].name), |
19804 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 19805 | |
c906108c SS |
19806 | switch (die->attrs[i].form) |
19807 | { | |
c906108c | 19808 | case DW_FORM_addr: |
3019eac3 | 19809 | case DW_FORM_GNU_addr_index: |
d97bc12b | 19810 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 19811 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
19812 | break; |
19813 | case DW_FORM_block2: | |
19814 | case DW_FORM_block4: | |
19815 | case DW_FORM_block: | |
19816 | case DW_FORM_block1: | |
56eb65bd SP |
19817 | fprintf_unfiltered (f, "block: size %s", |
19818 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 19819 | break; |
2dc7f7b3 | 19820 | case DW_FORM_exprloc: |
56eb65bd SP |
19821 | fprintf_unfiltered (f, "expression: size %s", |
19822 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 19823 | break; |
4568ecf9 DE |
19824 | case DW_FORM_ref_addr: |
19825 | fprintf_unfiltered (f, "ref address: "); | |
19826 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19827 | break; | |
36586728 TT |
19828 | case DW_FORM_GNU_ref_alt: |
19829 | fprintf_unfiltered (f, "alt ref address: "); | |
19830 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19831 | break; | |
10b3939b DJ |
19832 | case DW_FORM_ref1: |
19833 | case DW_FORM_ref2: | |
19834 | case DW_FORM_ref4: | |
4568ecf9 DE |
19835 | case DW_FORM_ref8: |
19836 | case DW_FORM_ref_udata: | |
d97bc12b | 19837 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 19838 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 19839 | break; |
c906108c SS |
19840 | case DW_FORM_data1: |
19841 | case DW_FORM_data2: | |
19842 | case DW_FORM_data4: | |
ce5d95e1 | 19843 | case DW_FORM_data8: |
c906108c SS |
19844 | case DW_FORM_udata: |
19845 | case DW_FORM_sdata: | |
43bbcdc2 PH |
19846 | fprintf_unfiltered (f, "constant: %s", |
19847 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 19848 | break; |
2dc7f7b3 TT |
19849 | case DW_FORM_sec_offset: |
19850 | fprintf_unfiltered (f, "section offset: %s", | |
19851 | pulongest (DW_UNSND (&die->attrs[i]))); | |
19852 | break; | |
55f1336d | 19853 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
19854 | fprintf_unfiltered (f, "signature: %s", |
19855 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 19856 | break; |
c906108c | 19857 | case DW_FORM_string: |
4bdf3d34 | 19858 | case DW_FORM_strp: |
3019eac3 | 19859 | case DW_FORM_GNU_str_index: |
36586728 | 19860 | case DW_FORM_GNU_strp_alt: |
8285870a | 19861 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 19862 | DW_STRING (&die->attrs[i]) |
8285870a JK |
19863 | ? DW_STRING (&die->attrs[i]) : "", |
19864 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
19865 | break; |
19866 | case DW_FORM_flag: | |
19867 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 19868 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 19869 | else |
d97bc12b | 19870 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 19871 | break; |
2dc7f7b3 TT |
19872 | case DW_FORM_flag_present: |
19873 | fprintf_unfiltered (f, "flag: TRUE"); | |
19874 | break; | |
a8329558 | 19875 | case DW_FORM_indirect: |
0963b4bd MS |
19876 | /* The reader will have reduced the indirect form to |
19877 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
19878 | fprintf_unfiltered (f, |
19879 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 19880 | break; |
c906108c | 19881 | default: |
d97bc12b | 19882 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 19883 | die->attrs[i].form); |
d97bc12b | 19884 | break; |
c906108c | 19885 | } |
d97bc12b | 19886 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
19887 | } |
19888 | } | |
19889 | ||
f9aca02d | 19890 | static void |
d97bc12b | 19891 | dump_die_for_error (struct die_info *die) |
c906108c | 19892 | { |
d97bc12b DE |
19893 | dump_die_shallow (gdb_stderr, 0, die); |
19894 | } | |
19895 | ||
19896 | static void | |
19897 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
19898 | { | |
19899 | int indent = level * 4; | |
19900 | ||
19901 | gdb_assert (die != NULL); | |
19902 | ||
19903 | if (level >= max_level) | |
19904 | return; | |
19905 | ||
19906 | dump_die_shallow (f, indent, die); | |
19907 | ||
19908 | if (die->child != NULL) | |
c906108c | 19909 | { |
d97bc12b DE |
19910 | print_spaces (indent, f); |
19911 | fprintf_unfiltered (f, " Children:"); | |
19912 | if (level + 1 < max_level) | |
19913 | { | |
19914 | fprintf_unfiltered (f, "\n"); | |
19915 | dump_die_1 (f, level + 1, max_level, die->child); | |
19916 | } | |
19917 | else | |
19918 | { | |
3e43a32a MS |
19919 | fprintf_unfiltered (f, |
19920 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
19921 | } |
19922 | } | |
19923 | ||
19924 | if (die->sibling != NULL && level > 0) | |
19925 | { | |
19926 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
19927 | } |
19928 | } | |
19929 | ||
d97bc12b DE |
19930 | /* This is called from the pdie macro in gdbinit.in. |
19931 | It's not static so gcc will keep a copy callable from gdb. */ | |
19932 | ||
19933 | void | |
19934 | dump_die (struct die_info *die, int max_level) | |
19935 | { | |
19936 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
19937 | } | |
19938 | ||
f9aca02d | 19939 | static void |
51545339 | 19940 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19941 | { |
51545339 | 19942 | void **slot; |
c906108c | 19943 | |
b64f50a1 JK |
19944 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
19945 | INSERT); | |
51545339 DJ |
19946 | |
19947 | *slot = die; | |
c906108c SS |
19948 | } |
19949 | ||
b64f50a1 JK |
19950 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
19951 | required kind. */ | |
19952 | ||
19953 | static sect_offset | |
ff39bb5e | 19954 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 19955 | { |
4568ecf9 | 19956 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 19957 | |
7771576e | 19958 | if (attr_form_is_ref (attr)) |
b64f50a1 | 19959 | return retval; |
93311388 | 19960 | |
b64f50a1 | 19961 | retval.sect_off = 0; |
93311388 DE |
19962 | complaint (&symfile_complaints, |
19963 | _("unsupported die ref attribute form: '%s'"), | |
19964 | dwarf_form_name (attr->form)); | |
b64f50a1 | 19965 | return retval; |
c906108c SS |
19966 | } |
19967 | ||
43bbcdc2 PH |
19968 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
19969 | * the value held by the attribute is not constant. */ | |
a02abb62 | 19970 | |
43bbcdc2 | 19971 | static LONGEST |
ff39bb5e | 19972 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
19973 | { |
19974 | if (attr->form == DW_FORM_sdata) | |
19975 | return DW_SND (attr); | |
19976 | else if (attr->form == DW_FORM_udata | |
19977 | || attr->form == DW_FORM_data1 | |
19978 | || attr->form == DW_FORM_data2 | |
19979 | || attr->form == DW_FORM_data4 | |
19980 | || attr->form == DW_FORM_data8) | |
19981 | return DW_UNSND (attr); | |
19982 | else | |
19983 | { | |
3e43a32a MS |
19984 | complaint (&symfile_complaints, |
19985 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
19986 | dwarf_form_name (attr->form)); |
19987 | return default_value; | |
19988 | } | |
19989 | } | |
19990 | ||
348e048f DE |
19991 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
19992 | On entry *REF_CU is the CU of SRC_DIE. | |
19993 | On exit *REF_CU is the CU of the result. */ | |
19994 | ||
19995 | static struct die_info * | |
ff39bb5e | 19996 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
19997 | struct dwarf2_cu **ref_cu) |
19998 | { | |
19999 | struct die_info *die; | |
20000 | ||
7771576e | 20001 | if (attr_form_is_ref (attr)) |
348e048f | 20002 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 20003 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
20004 | die = follow_die_sig (src_die, attr, ref_cu); |
20005 | else | |
20006 | { | |
20007 | dump_die_for_error (src_die); | |
20008 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 20009 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
20010 | } |
20011 | ||
20012 | return die; | |
03dd20cc DJ |
20013 | } |
20014 | ||
5c631832 | 20015 | /* Follow reference OFFSET. |
673bfd45 DE |
20016 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
20017 | On exit *REF_CU is the CU of the result. | |
20018 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 20019 | |
f9aca02d | 20020 | static struct die_info * |
36586728 TT |
20021 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
20022 | struct dwarf2_cu **ref_cu) | |
c906108c | 20023 | { |
10b3939b | 20024 | struct die_info temp_die; |
f2f0e013 | 20025 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 20026 | |
348e048f DE |
20027 | gdb_assert (cu->per_cu != NULL); |
20028 | ||
98bfdba5 PA |
20029 | target_cu = cu; |
20030 | ||
3019eac3 | 20031 | if (cu->per_cu->is_debug_types) |
348e048f DE |
20032 | { |
20033 | /* .debug_types CUs cannot reference anything outside their CU. | |
20034 | If they need to, they have to reference a signatured type via | |
55f1336d | 20035 | DW_FORM_ref_sig8. */ |
348e048f | 20036 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 20037 | return NULL; |
348e048f | 20038 | } |
36586728 TT |
20039 | else if (offset_in_dwz != cu->per_cu->is_dwz |
20040 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
20041 | { |
20042 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 20043 | |
36586728 TT |
20044 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
20045 | cu->objfile); | |
03dd20cc DJ |
20046 | |
20047 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
20048 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
20049 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 20050 | |
10b3939b DJ |
20051 | target_cu = per_cu->cu; |
20052 | } | |
98bfdba5 PA |
20053 | else if (cu->dies == NULL) |
20054 | { | |
20055 | /* We're loading full DIEs during partial symbol reading. */ | |
20056 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 20057 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 20058 | } |
c906108c | 20059 | |
f2f0e013 | 20060 | *ref_cu = target_cu; |
51545339 | 20061 | temp_die.offset = offset; |
9a3c8263 SM |
20062 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
20063 | &temp_die, offset.sect_off); | |
5c631832 | 20064 | } |
10b3939b | 20065 | |
5c631832 JK |
20066 | /* Follow reference attribute ATTR of SRC_DIE. |
20067 | On entry *REF_CU is the CU of SRC_DIE. | |
20068 | On exit *REF_CU is the CU of the result. */ | |
20069 | ||
20070 | static struct die_info * | |
ff39bb5e | 20071 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
20072 | struct dwarf2_cu **ref_cu) |
20073 | { | |
b64f50a1 | 20074 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
20075 | struct dwarf2_cu *cu = *ref_cu; |
20076 | struct die_info *die; | |
20077 | ||
36586728 TT |
20078 | die = follow_die_offset (offset, |
20079 | (attr->form == DW_FORM_GNU_ref_alt | |
20080 | || cu->per_cu->is_dwz), | |
20081 | ref_cu); | |
5c631832 JK |
20082 | if (!die) |
20083 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
20084 | "at 0x%x [in module %s]"), | |
4262abfb JK |
20085 | offset.sect_off, src_die->offset.sect_off, |
20086 | objfile_name (cu->objfile)); | |
348e048f | 20087 | |
5c631832 JK |
20088 | return die; |
20089 | } | |
20090 | ||
d83e736b JK |
20091 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
20092 | Returned value is intended for DW_OP_call*. Returned | |
20093 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
20094 | |
20095 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
20096 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
20097 | struct dwarf2_per_cu_data *per_cu, | |
20098 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20099 | void *baton) | |
5c631832 | 20100 | { |
918dd910 | 20101 | struct dwarf2_cu *cu; |
5c631832 JK |
20102 | struct die_info *die; |
20103 | struct attribute *attr; | |
20104 | struct dwarf2_locexpr_baton retval; | |
20105 | ||
8cf6f0b1 TT |
20106 | dw2_setup (per_cu->objfile); |
20107 | ||
918dd910 JK |
20108 | if (per_cu->cu == NULL) |
20109 | load_cu (per_cu); | |
20110 | cu = per_cu->cu; | |
cc12ce38 DE |
20111 | if (cu == NULL) |
20112 | { | |
20113 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20114 | Instead just throw an error, not much else we can do. */ | |
20115 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
20116 | offset.sect_off, objfile_name (per_cu->objfile)); | |
20117 | } | |
918dd910 | 20118 | |
36586728 | 20119 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
20120 | if (!die) |
20121 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 20122 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
20123 | |
20124 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
20125 | if (!attr) | |
20126 | { | |
e103e986 JK |
20127 | /* DWARF: "If there is no such attribute, then there is no effect.". |
20128 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 20129 | |
e103e986 | 20130 | retval.data = NULL; |
5c631832 JK |
20131 | retval.size = 0; |
20132 | } | |
8cf6f0b1 TT |
20133 | else if (attr_form_is_section_offset (attr)) |
20134 | { | |
20135 | struct dwarf2_loclist_baton loclist_baton; | |
20136 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
20137 | size_t size; | |
20138 | ||
20139 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
20140 | ||
20141 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
20142 | &size, pc); | |
20143 | retval.size = size; | |
20144 | } | |
5c631832 JK |
20145 | else |
20146 | { | |
20147 | if (!attr_form_is_block (attr)) | |
20148 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
20149 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 20150 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
20151 | |
20152 | retval.data = DW_BLOCK (attr)->data; | |
20153 | retval.size = DW_BLOCK (attr)->size; | |
20154 | } | |
20155 | retval.per_cu = cu->per_cu; | |
918dd910 | 20156 | |
918dd910 JK |
20157 | age_cached_comp_units (); |
20158 | ||
5c631832 | 20159 | return retval; |
348e048f DE |
20160 | } |
20161 | ||
8b9737bf TT |
20162 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
20163 | offset. */ | |
20164 | ||
20165 | struct dwarf2_locexpr_baton | |
20166 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
20167 | struct dwarf2_per_cu_data *per_cu, | |
20168 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20169 | void *baton) | |
20170 | { | |
20171 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
20172 | ||
20173 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
20174 | } | |
20175 | ||
b6807d98 TT |
20176 | /* Write a constant of a given type as target-ordered bytes into |
20177 | OBSTACK. */ | |
20178 | ||
20179 | static const gdb_byte * | |
20180 | write_constant_as_bytes (struct obstack *obstack, | |
20181 | enum bfd_endian byte_order, | |
20182 | struct type *type, | |
20183 | ULONGEST value, | |
20184 | LONGEST *len) | |
20185 | { | |
20186 | gdb_byte *result; | |
20187 | ||
20188 | *len = TYPE_LENGTH (type); | |
224c3ddb | 20189 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20190 | store_unsigned_integer (result, *len, byte_order, value); |
20191 | ||
20192 | return result; | |
20193 | } | |
20194 | ||
20195 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
20196 | pointer to the constant bytes and set LEN to the length of the | |
20197 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
20198 | does not have a DW_AT_const_value, return NULL. */ | |
20199 | ||
20200 | const gdb_byte * | |
20201 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
20202 | struct dwarf2_per_cu_data *per_cu, | |
20203 | struct obstack *obstack, | |
20204 | LONGEST *len) | |
20205 | { | |
20206 | struct dwarf2_cu *cu; | |
20207 | struct die_info *die; | |
20208 | struct attribute *attr; | |
20209 | const gdb_byte *result = NULL; | |
20210 | struct type *type; | |
20211 | LONGEST value; | |
20212 | enum bfd_endian byte_order; | |
20213 | ||
20214 | dw2_setup (per_cu->objfile); | |
20215 | ||
20216 | if (per_cu->cu == NULL) | |
20217 | load_cu (per_cu); | |
20218 | cu = per_cu->cu; | |
cc12ce38 DE |
20219 | if (cu == NULL) |
20220 | { | |
20221 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20222 | Instead just throw an error, not much else we can do. */ | |
20223 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
20224 | offset.sect_off, objfile_name (per_cu->objfile)); | |
20225 | } | |
b6807d98 TT |
20226 | |
20227 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
20228 | if (!die) | |
20229 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 20230 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
20231 | |
20232 | ||
20233 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
20234 | if (attr == NULL) | |
20235 | return NULL; | |
20236 | ||
20237 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
20238 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20239 | ||
20240 | switch (attr->form) | |
20241 | { | |
20242 | case DW_FORM_addr: | |
20243 | case DW_FORM_GNU_addr_index: | |
20244 | { | |
20245 | gdb_byte *tem; | |
20246 | ||
20247 | *len = cu->header.addr_size; | |
224c3ddb | 20248 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20249 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
20250 | result = tem; | |
20251 | } | |
20252 | break; | |
20253 | case DW_FORM_string: | |
20254 | case DW_FORM_strp: | |
20255 | case DW_FORM_GNU_str_index: | |
20256 | case DW_FORM_GNU_strp_alt: | |
20257 | /* DW_STRING is already allocated on the objfile obstack, point | |
20258 | directly to it. */ | |
20259 | result = (const gdb_byte *) DW_STRING (attr); | |
20260 | *len = strlen (DW_STRING (attr)); | |
20261 | break; | |
20262 | case DW_FORM_block1: | |
20263 | case DW_FORM_block2: | |
20264 | case DW_FORM_block4: | |
20265 | case DW_FORM_block: | |
20266 | case DW_FORM_exprloc: | |
20267 | result = DW_BLOCK (attr)->data; | |
20268 | *len = DW_BLOCK (attr)->size; | |
20269 | break; | |
20270 | ||
20271 | /* The DW_AT_const_value attributes are supposed to carry the | |
20272 | symbol's value "represented as it would be on the target | |
20273 | architecture." By the time we get here, it's already been | |
20274 | converted to host endianness, so we just need to sign- or | |
20275 | zero-extend it as appropriate. */ | |
20276 | case DW_FORM_data1: | |
20277 | type = die_type (die, cu); | |
20278 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
20279 | if (result == NULL) | |
20280 | result = write_constant_as_bytes (obstack, byte_order, | |
20281 | type, value, len); | |
20282 | break; | |
20283 | case DW_FORM_data2: | |
20284 | type = die_type (die, cu); | |
20285 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
20286 | if (result == NULL) | |
20287 | result = write_constant_as_bytes (obstack, byte_order, | |
20288 | type, value, len); | |
20289 | break; | |
20290 | case DW_FORM_data4: | |
20291 | type = die_type (die, cu); | |
20292 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
20293 | if (result == NULL) | |
20294 | result = write_constant_as_bytes (obstack, byte_order, | |
20295 | type, value, len); | |
20296 | break; | |
20297 | case DW_FORM_data8: | |
20298 | type = die_type (die, cu); | |
20299 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
20300 | if (result == NULL) | |
20301 | result = write_constant_as_bytes (obstack, byte_order, | |
20302 | type, value, len); | |
20303 | break; | |
20304 | ||
20305 | case DW_FORM_sdata: | |
20306 | type = die_type (die, cu); | |
20307 | result = write_constant_as_bytes (obstack, byte_order, | |
20308 | type, DW_SND (attr), len); | |
20309 | break; | |
20310 | ||
20311 | case DW_FORM_udata: | |
20312 | type = die_type (die, cu); | |
20313 | result = write_constant_as_bytes (obstack, byte_order, | |
20314 | type, DW_UNSND (attr), len); | |
20315 | break; | |
20316 | ||
20317 | default: | |
20318 | complaint (&symfile_complaints, | |
20319 | _("unsupported const value attribute form: '%s'"), | |
20320 | dwarf_form_name (attr->form)); | |
20321 | break; | |
20322 | } | |
20323 | ||
20324 | return result; | |
20325 | } | |
20326 | ||
8a9b8146 TT |
20327 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
20328 | PER_CU. */ | |
20329 | ||
20330 | struct type * | |
b64f50a1 | 20331 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
20332 | struct dwarf2_per_cu_data *per_cu) |
20333 | { | |
b64f50a1 JK |
20334 | sect_offset die_offset_sect; |
20335 | ||
8a9b8146 | 20336 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
20337 | |
20338 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
20339 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
20340 | } |
20341 | ||
ac9ec31b | 20342 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 20343 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
20344 | On exit *REF_CU is the CU of the result. |
20345 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
20346 | |
20347 | static struct die_info * | |
ac9ec31b DE |
20348 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
20349 | struct dwarf2_cu **ref_cu) | |
348e048f | 20350 | { |
348e048f | 20351 | struct die_info temp_die; |
348e048f DE |
20352 | struct dwarf2_cu *sig_cu; |
20353 | struct die_info *die; | |
20354 | ||
ac9ec31b DE |
20355 | /* While it might be nice to assert sig_type->type == NULL here, |
20356 | we can get here for DW_AT_imported_declaration where we need | |
20357 | the DIE not the type. */ | |
348e048f DE |
20358 | |
20359 | /* If necessary, add it to the queue and load its DIEs. */ | |
20360 | ||
95554aad | 20361 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 20362 | read_signatured_type (sig_type); |
348e048f | 20363 | |
348e048f | 20364 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 20365 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
20366 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
20367 | temp_die.offset = sig_type->type_offset_in_section; | |
9a3c8263 SM |
20368 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
20369 | temp_die.offset.sect_off); | |
348e048f DE |
20370 | if (die) |
20371 | { | |
796a7ff8 DE |
20372 | /* For .gdb_index version 7 keep track of included TUs. |
20373 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
20374 | if (dwarf2_per_objfile->index_table != NULL | |
20375 | && dwarf2_per_objfile->index_table->version <= 7) | |
20376 | { | |
20377 | VEC_safe_push (dwarf2_per_cu_ptr, | |
20378 | (*ref_cu)->per_cu->imported_symtabs, | |
20379 | sig_cu->per_cu); | |
20380 | } | |
20381 | ||
348e048f DE |
20382 | *ref_cu = sig_cu; |
20383 | return die; | |
20384 | } | |
20385 | ||
ac9ec31b DE |
20386 | return NULL; |
20387 | } | |
20388 | ||
20389 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
20390 | On entry *REF_CU is the CU of SRC_DIE. | |
20391 | On exit *REF_CU is the CU of the result. | |
20392 | The result is the DIE of the type. | |
20393 | If the referenced type cannot be found an error is thrown. */ | |
20394 | ||
20395 | static struct die_info * | |
ff39bb5e | 20396 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
20397 | struct dwarf2_cu **ref_cu) |
20398 | { | |
20399 | ULONGEST signature = DW_SIGNATURE (attr); | |
20400 | struct signatured_type *sig_type; | |
20401 | struct die_info *die; | |
20402 | ||
20403 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
20404 | ||
a2ce51a0 | 20405 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
20406 | /* sig_type will be NULL if the signatured type is missing from |
20407 | the debug info. */ | |
20408 | if (sig_type == NULL) | |
20409 | { | |
20410 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
20411 | " from DIE at 0x%x [in module %s]"), | |
20412 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 20413 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
20414 | } |
20415 | ||
20416 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
20417 | if (die == NULL) | |
20418 | { | |
20419 | dump_die_for_error (src_die); | |
20420 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
20421 | " from DIE at 0x%x [in module %s]"), | |
20422 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 20423 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
20424 | } |
20425 | ||
20426 | return die; | |
20427 | } | |
20428 | ||
20429 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
20430 | reading in and processing the type unit if necessary. */ | |
20431 | ||
20432 | static struct type * | |
20433 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
20434 | struct dwarf2_cu *cu) | |
20435 | { | |
20436 | struct signatured_type *sig_type; | |
20437 | struct dwarf2_cu *type_cu; | |
20438 | struct die_info *type_die; | |
20439 | struct type *type; | |
20440 | ||
a2ce51a0 | 20441 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
20442 | /* sig_type will be NULL if the signatured type is missing from |
20443 | the debug info. */ | |
20444 | if (sig_type == NULL) | |
20445 | { | |
20446 | complaint (&symfile_complaints, | |
20447 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
20448 | " from DIE at 0x%x [in module %s]"), | |
20449 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20450 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20451 | return build_error_marker_type (cu, die); |
20452 | } | |
20453 | ||
20454 | /* If we already know the type we're done. */ | |
20455 | if (sig_type->type != NULL) | |
20456 | return sig_type->type; | |
20457 | ||
20458 | type_cu = cu; | |
20459 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
20460 | if (type_die != NULL) | |
20461 | { | |
20462 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
20463 | is created. This is important, for example, because for c++ classes | |
20464 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
20465 | type = read_type_die (type_die, type_cu); | |
20466 | if (type == NULL) | |
20467 | { | |
20468 | complaint (&symfile_complaints, | |
20469 | _("Dwarf Error: Cannot build signatured type %s" | |
20470 | " referenced from DIE at 0x%x [in module %s]"), | |
20471 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20472 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20473 | type = build_error_marker_type (cu, die); |
20474 | } | |
20475 | } | |
20476 | else | |
20477 | { | |
20478 | complaint (&symfile_complaints, | |
20479 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
20480 | " from DIE at 0x%x [in module %s]"), | |
20481 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 20482 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20483 | type = build_error_marker_type (cu, die); |
20484 | } | |
20485 | sig_type->type = type; | |
20486 | ||
20487 | return type; | |
20488 | } | |
20489 | ||
20490 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
20491 | reading in and processing the type unit if necessary. */ | |
20492 | ||
20493 | static struct type * | |
ff39bb5e | 20494 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 20495 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
20496 | { |
20497 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 20498 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
20499 | { |
20500 | struct dwarf2_cu *type_cu = cu; | |
20501 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
20502 | ||
20503 | return read_type_die (type_die, type_cu); | |
20504 | } | |
20505 | else if (attr->form == DW_FORM_ref_sig8) | |
20506 | { | |
20507 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
20508 | } | |
20509 | else | |
20510 | { | |
20511 | complaint (&symfile_complaints, | |
20512 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
20513 | " at 0x%x [in module %s]"), | |
20514 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 20515 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
20516 | return build_error_marker_type (cu, die); |
20517 | } | |
348e048f DE |
20518 | } |
20519 | ||
e5fe5e75 | 20520 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
20521 | |
20522 | static void | |
e5fe5e75 | 20523 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 20524 | { |
52dc124a | 20525 | struct signatured_type *sig_type; |
348e048f | 20526 | |
f4dc4d17 DE |
20527 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
20528 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
20529 | ||
6721b2ec DE |
20530 | /* We have the per_cu, but we need the signatured_type. |
20531 | Fortunately this is an easy translation. */ | |
20532 | gdb_assert (per_cu->is_debug_types); | |
20533 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 20534 | |
6721b2ec | 20535 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20536 | |
52dc124a | 20537 | read_signatured_type (sig_type); |
348e048f | 20538 | |
6721b2ec | 20539 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
20540 | } |
20541 | ||
dee91e82 DE |
20542 | /* die_reader_func for read_signatured_type. |
20543 | This is identical to load_full_comp_unit_reader, | |
20544 | but is kept separate for now. */ | |
348e048f DE |
20545 | |
20546 | static void | |
dee91e82 | 20547 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 20548 | const gdb_byte *info_ptr, |
dee91e82 DE |
20549 | struct die_info *comp_unit_die, |
20550 | int has_children, | |
20551 | void *data) | |
348e048f | 20552 | { |
dee91e82 | 20553 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 20554 | |
dee91e82 DE |
20555 | gdb_assert (cu->die_hash == NULL); |
20556 | cu->die_hash = | |
20557 | htab_create_alloc_ex (cu->header.length / 12, | |
20558 | die_hash, | |
20559 | die_eq, | |
20560 | NULL, | |
20561 | &cu->comp_unit_obstack, | |
20562 | hashtab_obstack_allocate, | |
20563 | dummy_obstack_deallocate); | |
348e048f | 20564 | |
dee91e82 DE |
20565 | if (has_children) |
20566 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
20567 | &info_ptr, comp_unit_die); | |
20568 | cu->dies = comp_unit_die; | |
20569 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
20570 | |
20571 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 20572 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 20573 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
20574 | or we won't be able to build types correctly. |
20575 | Similarly, if we do not read the producer, we can not apply | |
20576 | producer-specific interpretation. */ | |
95554aad | 20577 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 20578 | } |
348e048f | 20579 | |
3019eac3 DE |
20580 | /* Read in a signatured type and build its CU and DIEs. |
20581 | If the type is a stub for the real type in a DWO file, | |
20582 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
20583 | |
20584 | static void | |
20585 | read_signatured_type (struct signatured_type *sig_type) | |
20586 | { | |
20587 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 20588 | |
3019eac3 | 20589 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 20590 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20591 | |
f4dc4d17 DE |
20592 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
20593 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 20594 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
20595 | } |
20596 | ||
c906108c SS |
20597 | /* Decode simple location descriptions. |
20598 | Given a pointer to a dwarf block that defines a location, compute | |
20599 | the location and return the value. | |
20600 | ||
4cecd739 DJ |
20601 | NOTE drow/2003-11-18: This function is called in two situations |
20602 | now: for the address of static or global variables (partial symbols | |
20603 | only) and for offsets into structures which are expected to be | |
20604 | (more or less) constant. The partial symbol case should go away, | |
20605 | and only the constant case should remain. That will let this | |
20606 | function complain more accurately. A few special modes are allowed | |
20607 | without complaint for global variables (for instance, global | |
20608 | register values and thread-local values). | |
c906108c SS |
20609 | |
20610 | A location description containing no operations indicates that the | |
4cecd739 | 20611 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
20612 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
20613 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
20614 | complaint. |
20615 | ||
20616 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
20617 | |
20618 | static CORE_ADDR | |
e7c27a73 | 20619 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 20620 | { |
e7c27a73 | 20621 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
20622 | size_t i; |
20623 | size_t size = blk->size; | |
d521ce57 | 20624 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
20625 | CORE_ADDR stack[64]; |
20626 | int stacki; | |
20627 | unsigned int bytes_read, unsnd; | |
20628 | gdb_byte op; | |
c906108c | 20629 | |
21ae7a4d JK |
20630 | i = 0; |
20631 | stacki = 0; | |
20632 | stack[stacki] = 0; | |
20633 | stack[++stacki] = 0; | |
20634 | ||
20635 | while (i < size) | |
20636 | { | |
20637 | op = data[i++]; | |
20638 | switch (op) | |
20639 | { | |
20640 | case DW_OP_lit0: | |
20641 | case DW_OP_lit1: | |
20642 | case DW_OP_lit2: | |
20643 | case DW_OP_lit3: | |
20644 | case DW_OP_lit4: | |
20645 | case DW_OP_lit5: | |
20646 | case DW_OP_lit6: | |
20647 | case DW_OP_lit7: | |
20648 | case DW_OP_lit8: | |
20649 | case DW_OP_lit9: | |
20650 | case DW_OP_lit10: | |
20651 | case DW_OP_lit11: | |
20652 | case DW_OP_lit12: | |
20653 | case DW_OP_lit13: | |
20654 | case DW_OP_lit14: | |
20655 | case DW_OP_lit15: | |
20656 | case DW_OP_lit16: | |
20657 | case DW_OP_lit17: | |
20658 | case DW_OP_lit18: | |
20659 | case DW_OP_lit19: | |
20660 | case DW_OP_lit20: | |
20661 | case DW_OP_lit21: | |
20662 | case DW_OP_lit22: | |
20663 | case DW_OP_lit23: | |
20664 | case DW_OP_lit24: | |
20665 | case DW_OP_lit25: | |
20666 | case DW_OP_lit26: | |
20667 | case DW_OP_lit27: | |
20668 | case DW_OP_lit28: | |
20669 | case DW_OP_lit29: | |
20670 | case DW_OP_lit30: | |
20671 | case DW_OP_lit31: | |
20672 | stack[++stacki] = op - DW_OP_lit0; | |
20673 | break; | |
f1bea926 | 20674 | |
21ae7a4d JK |
20675 | case DW_OP_reg0: |
20676 | case DW_OP_reg1: | |
20677 | case DW_OP_reg2: | |
20678 | case DW_OP_reg3: | |
20679 | case DW_OP_reg4: | |
20680 | case DW_OP_reg5: | |
20681 | case DW_OP_reg6: | |
20682 | case DW_OP_reg7: | |
20683 | case DW_OP_reg8: | |
20684 | case DW_OP_reg9: | |
20685 | case DW_OP_reg10: | |
20686 | case DW_OP_reg11: | |
20687 | case DW_OP_reg12: | |
20688 | case DW_OP_reg13: | |
20689 | case DW_OP_reg14: | |
20690 | case DW_OP_reg15: | |
20691 | case DW_OP_reg16: | |
20692 | case DW_OP_reg17: | |
20693 | case DW_OP_reg18: | |
20694 | case DW_OP_reg19: | |
20695 | case DW_OP_reg20: | |
20696 | case DW_OP_reg21: | |
20697 | case DW_OP_reg22: | |
20698 | case DW_OP_reg23: | |
20699 | case DW_OP_reg24: | |
20700 | case DW_OP_reg25: | |
20701 | case DW_OP_reg26: | |
20702 | case DW_OP_reg27: | |
20703 | case DW_OP_reg28: | |
20704 | case DW_OP_reg29: | |
20705 | case DW_OP_reg30: | |
20706 | case DW_OP_reg31: | |
20707 | stack[++stacki] = op - DW_OP_reg0; | |
20708 | if (i < size) | |
20709 | dwarf2_complex_location_expr_complaint (); | |
20710 | break; | |
c906108c | 20711 | |
21ae7a4d JK |
20712 | case DW_OP_regx: |
20713 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
20714 | i += bytes_read; | |
20715 | stack[++stacki] = unsnd; | |
20716 | if (i < size) | |
20717 | dwarf2_complex_location_expr_complaint (); | |
20718 | break; | |
c906108c | 20719 | |
21ae7a4d JK |
20720 | case DW_OP_addr: |
20721 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
20722 | cu, &bytes_read); | |
20723 | i += bytes_read; | |
20724 | break; | |
d53d4ac5 | 20725 | |
21ae7a4d JK |
20726 | case DW_OP_const1u: |
20727 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
20728 | i += 1; | |
20729 | break; | |
20730 | ||
20731 | case DW_OP_const1s: | |
20732 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
20733 | i += 1; | |
20734 | break; | |
20735 | ||
20736 | case DW_OP_const2u: | |
20737 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
20738 | i += 2; | |
20739 | break; | |
20740 | ||
20741 | case DW_OP_const2s: | |
20742 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
20743 | i += 2; | |
20744 | break; | |
d53d4ac5 | 20745 | |
21ae7a4d JK |
20746 | case DW_OP_const4u: |
20747 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
20748 | i += 4; | |
20749 | break; | |
20750 | ||
20751 | case DW_OP_const4s: | |
20752 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
20753 | i += 4; | |
20754 | break; | |
20755 | ||
585861ea JK |
20756 | case DW_OP_const8u: |
20757 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
20758 | i += 8; | |
20759 | break; | |
20760 | ||
21ae7a4d JK |
20761 | case DW_OP_constu: |
20762 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
20763 | &bytes_read); | |
20764 | i += bytes_read; | |
20765 | break; | |
20766 | ||
20767 | case DW_OP_consts: | |
20768 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
20769 | i += bytes_read; | |
20770 | break; | |
20771 | ||
20772 | case DW_OP_dup: | |
20773 | stack[stacki + 1] = stack[stacki]; | |
20774 | stacki++; | |
20775 | break; | |
20776 | ||
20777 | case DW_OP_plus: | |
20778 | stack[stacki - 1] += stack[stacki]; | |
20779 | stacki--; | |
20780 | break; | |
20781 | ||
20782 | case DW_OP_plus_uconst: | |
20783 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
20784 | &bytes_read); | |
20785 | i += bytes_read; | |
20786 | break; | |
20787 | ||
20788 | case DW_OP_minus: | |
20789 | stack[stacki - 1] -= stack[stacki]; | |
20790 | stacki--; | |
20791 | break; | |
20792 | ||
20793 | case DW_OP_deref: | |
20794 | /* If we're not the last op, then we definitely can't encode | |
20795 | this using GDB's address_class enum. This is valid for partial | |
20796 | global symbols, although the variable's address will be bogus | |
20797 | in the psymtab. */ | |
20798 | if (i < size) | |
20799 | dwarf2_complex_location_expr_complaint (); | |
20800 | break; | |
20801 | ||
20802 | case DW_OP_GNU_push_tls_address: | |
20803 | /* The top of the stack has the offset from the beginning | |
20804 | of the thread control block at which the variable is located. */ | |
20805 | /* Nothing should follow this operator, so the top of stack would | |
20806 | be returned. */ | |
20807 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
20808 | address will be bogus in the psymtab. Make it always at least |
20809 | non-zero to not look as a variable garbage collected by linker | |
20810 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
20811 | if (i < size) |
20812 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 20813 | stack[stacki]++; |
21ae7a4d JK |
20814 | break; |
20815 | ||
20816 | case DW_OP_GNU_uninit: | |
20817 | break; | |
20818 | ||
3019eac3 | 20819 | case DW_OP_GNU_addr_index: |
49f6c839 | 20820 | case DW_OP_GNU_const_index: |
3019eac3 DE |
20821 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
20822 | &bytes_read); | |
20823 | i += bytes_read; | |
20824 | break; | |
20825 | ||
21ae7a4d JK |
20826 | default: |
20827 | { | |
f39c6ffd | 20828 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
20829 | |
20830 | if (name) | |
20831 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
20832 | name); | |
20833 | else | |
20834 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
20835 | op); | |
20836 | } | |
20837 | ||
20838 | return (stack[stacki]); | |
d53d4ac5 | 20839 | } |
3c6e0cb3 | 20840 | |
21ae7a4d JK |
20841 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
20842 | outside of the allocated space. Also enforce minimum>0. */ | |
20843 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
20844 | { | |
20845 | complaint (&symfile_complaints, | |
20846 | _("location description stack overflow")); | |
20847 | return 0; | |
20848 | } | |
20849 | ||
20850 | if (stacki <= 0) | |
20851 | { | |
20852 | complaint (&symfile_complaints, | |
20853 | _("location description stack underflow")); | |
20854 | return 0; | |
20855 | } | |
20856 | } | |
20857 | return (stack[stacki]); | |
c906108c SS |
20858 | } |
20859 | ||
20860 | /* memory allocation interface */ | |
20861 | ||
c906108c | 20862 | static struct dwarf_block * |
7b5a2f43 | 20863 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 20864 | { |
8d749320 | 20865 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
20866 | } |
20867 | ||
c906108c | 20868 | static struct die_info * |
b60c80d6 | 20869 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
20870 | { |
20871 | struct die_info *die; | |
b60c80d6 DJ |
20872 | size_t size = sizeof (struct die_info); |
20873 | ||
20874 | if (num_attrs > 1) | |
20875 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 20876 | |
b60c80d6 | 20877 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
20878 | memset (die, 0, sizeof (struct die_info)); |
20879 | return (die); | |
20880 | } | |
2e276125 JB |
20881 | |
20882 | \f | |
20883 | /* Macro support. */ | |
20884 | ||
233d95b5 JK |
20885 | /* Return file name relative to the compilation directory of file number I in |
20886 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 20887 | responsible for freeing it. */ |
233d95b5 | 20888 | |
2e276125 | 20889 | static char * |
233d95b5 | 20890 | file_file_name (int file, struct line_header *lh) |
2e276125 | 20891 | { |
6a83a1e6 EZ |
20892 | /* Is the file number a valid index into the line header's file name |
20893 | table? Remember that file numbers start with one, not zero. */ | |
20894 | if (1 <= file && file <= lh->num_file_names) | |
20895 | { | |
20896 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 20897 | |
afa6c9ab SL |
20898 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0 |
20899 | || lh->include_dirs == NULL) | |
6a83a1e6 | 20900 | return xstrdup (fe->name); |
233d95b5 | 20901 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
b36cec19 | 20902 | fe->name, (char *) NULL); |
6a83a1e6 | 20903 | } |
2e276125 JB |
20904 | else |
20905 | { | |
6a83a1e6 EZ |
20906 | /* The compiler produced a bogus file number. We can at least |
20907 | record the macro definitions made in the file, even if we | |
20908 | won't be able to find the file by name. */ | |
20909 | char fake_name[80]; | |
9a619af0 | 20910 | |
8c042590 PM |
20911 | xsnprintf (fake_name, sizeof (fake_name), |
20912 | "<bad macro file number %d>", file); | |
2e276125 | 20913 | |
6e70227d | 20914 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
20915 | _("bad file number in macro information (%d)"), |
20916 | file); | |
2e276125 | 20917 | |
6a83a1e6 | 20918 | return xstrdup (fake_name); |
2e276125 JB |
20919 | } |
20920 | } | |
20921 | ||
233d95b5 JK |
20922 | /* Return the full name of file number I in *LH's file name table. |
20923 | Use COMP_DIR as the name of the current directory of the | |
20924 | compilation. The result is allocated using xmalloc; the caller is | |
20925 | responsible for freeing it. */ | |
20926 | static char * | |
20927 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
20928 | { | |
20929 | /* Is the file number a valid index into the line header's file name | |
20930 | table? Remember that file numbers start with one, not zero. */ | |
20931 | if (1 <= file && file <= lh->num_file_names) | |
20932 | { | |
20933 | char *relative = file_file_name (file, lh); | |
20934 | ||
20935 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
20936 | return relative; | |
b36cec19 PA |
20937 | return reconcat (relative, comp_dir, SLASH_STRING, |
20938 | relative, (char *) NULL); | |
233d95b5 JK |
20939 | } |
20940 | else | |
20941 | return file_file_name (file, lh); | |
20942 | } | |
20943 | ||
2e276125 JB |
20944 | |
20945 | static struct macro_source_file * | |
20946 | macro_start_file (int file, int line, | |
20947 | struct macro_source_file *current_file, | |
43f3e411 | 20948 | struct line_header *lh) |
2e276125 | 20949 | { |
233d95b5 JK |
20950 | /* File name relative to the compilation directory of this source file. */ |
20951 | char *file_name = file_file_name (file, lh); | |
2e276125 | 20952 | |
2e276125 | 20953 | if (! current_file) |
abc9d0dc | 20954 | { |
fc474241 DE |
20955 | /* Note: We don't create a macro table for this compilation unit |
20956 | at all until we actually get a filename. */ | |
43f3e411 | 20957 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 20958 | |
abc9d0dc TT |
20959 | /* If we have no current file, then this must be the start_file |
20960 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
20961 | current_file = macro_set_main (macro_table, file_name); |
20962 | macro_define_special (macro_table); | |
abc9d0dc | 20963 | } |
2e276125 | 20964 | else |
233d95b5 | 20965 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 20966 | |
233d95b5 | 20967 | xfree (file_name); |
6e70227d | 20968 | |
2e276125 JB |
20969 | return current_file; |
20970 | } | |
20971 | ||
20972 | ||
20973 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
20974 | followed by a null byte. */ | |
20975 | static char * | |
20976 | copy_string (const char *buf, int len) | |
20977 | { | |
224c3ddb | 20978 | char *s = (char *) xmalloc (len + 1); |
9a619af0 | 20979 | |
2e276125 JB |
20980 | memcpy (s, buf, len); |
20981 | s[len] = '\0'; | |
2e276125 JB |
20982 | return s; |
20983 | } | |
20984 | ||
20985 | ||
20986 | static const char * | |
20987 | consume_improper_spaces (const char *p, const char *body) | |
20988 | { | |
20989 | if (*p == ' ') | |
20990 | { | |
4d3c2250 | 20991 | complaint (&symfile_complaints, |
3e43a32a MS |
20992 | _("macro definition contains spaces " |
20993 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 20994 | body); |
2e276125 JB |
20995 | |
20996 | while (*p == ' ') | |
20997 | p++; | |
20998 | } | |
20999 | ||
21000 | return p; | |
21001 | } | |
21002 | ||
21003 | ||
21004 | static void | |
21005 | parse_macro_definition (struct macro_source_file *file, int line, | |
21006 | const char *body) | |
21007 | { | |
21008 | const char *p; | |
21009 | ||
21010 | /* The body string takes one of two forms. For object-like macro | |
21011 | definitions, it should be: | |
21012 | ||
21013 | <macro name> " " <definition> | |
21014 | ||
21015 | For function-like macro definitions, it should be: | |
21016 | ||
21017 | <macro name> "() " <definition> | |
21018 | or | |
21019 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
21020 | ||
21021 | Spaces may appear only where explicitly indicated, and in the | |
21022 | <definition>. | |
21023 | ||
21024 | The Dwarf 2 spec says that an object-like macro's name is always | |
21025 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 21026 | the space when the macro's definition is the empty string. |
2e276125 JB |
21027 | |
21028 | The Dwarf 2 spec says that there should be no spaces between the | |
21029 | formal arguments in a function-like macro's formal argument list, | |
21030 | but versions of GCC around March 2002 include spaces after the | |
21031 | commas. */ | |
21032 | ||
21033 | ||
21034 | /* Find the extent of the macro name. The macro name is terminated | |
21035 | by either a space or null character (for an object-like macro) or | |
21036 | an opening paren (for a function-like macro). */ | |
21037 | for (p = body; *p; p++) | |
21038 | if (*p == ' ' || *p == '(') | |
21039 | break; | |
21040 | ||
21041 | if (*p == ' ' || *p == '\0') | |
21042 | { | |
21043 | /* It's an object-like macro. */ | |
21044 | int name_len = p - body; | |
21045 | char *name = copy_string (body, name_len); | |
21046 | const char *replacement; | |
21047 | ||
21048 | if (*p == ' ') | |
21049 | replacement = body + name_len + 1; | |
21050 | else | |
21051 | { | |
4d3c2250 | 21052 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21053 | replacement = body + name_len; |
21054 | } | |
6e70227d | 21055 | |
2e276125 JB |
21056 | macro_define_object (file, line, name, replacement); |
21057 | ||
21058 | xfree (name); | |
21059 | } | |
21060 | else if (*p == '(') | |
21061 | { | |
21062 | /* It's a function-like macro. */ | |
21063 | char *name = copy_string (body, p - body); | |
21064 | int argc = 0; | |
21065 | int argv_size = 1; | |
8d749320 | 21066 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
21067 | |
21068 | p++; | |
21069 | ||
21070 | p = consume_improper_spaces (p, body); | |
21071 | ||
21072 | /* Parse the formal argument list. */ | |
21073 | while (*p && *p != ')') | |
21074 | { | |
21075 | /* Find the extent of the current argument name. */ | |
21076 | const char *arg_start = p; | |
21077 | ||
21078 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
21079 | p++; | |
21080 | ||
21081 | if (! *p || p == arg_start) | |
4d3c2250 | 21082 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21083 | else |
21084 | { | |
21085 | /* Make sure argv has room for the new argument. */ | |
21086 | if (argc >= argv_size) | |
21087 | { | |
21088 | argv_size *= 2; | |
224c3ddb | 21089 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
21090 | } |
21091 | ||
21092 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
21093 | } | |
21094 | ||
21095 | p = consume_improper_spaces (p, body); | |
21096 | ||
21097 | /* Consume the comma, if present. */ | |
21098 | if (*p == ',') | |
21099 | { | |
21100 | p++; | |
21101 | ||
21102 | p = consume_improper_spaces (p, body); | |
21103 | } | |
21104 | } | |
21105 | ||
21106 | if (*p == ')') | |
21107 | { | |
21108 | p++; | |
21109 | ||
21110 | if (*p == ' ') | |
21111 | /* Perfectly formed definition, no complaints. */ | |
21112 | macro_define_function (file, line, name, | |
6e70227d | 21113 | argc, (const char **) argv, |
2e276125 JB |
21114 | p + 1); |
21115 | else if (*p == '\0') | |
21116 | { | |
21117 | /* Complain, but do define it. */ | |
4d3c2250 | 21118 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 21119 | macro_define_function (file, line, name, |
6e70227d | 21120 | argc, (const char **) argv, |
2e276125 JB |
21121 | p); |
21122 | } | |
21123 | else | |
21124 | /* Just complain. */ | |
4d3c2250 | 21125 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21126 | } |
21127 | else | |
21128 | /* Just complain. */ | |
4d3c2250 | 21129 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21130 | |
21131 | xfree (name); | |
21132 | { | |
21133 | int i; | |
21134 | ||
21135 | for (i = 0; i < argc; i++) | |
21136 | xfree (argv[i]); | |
21137 | } | |
21138 | xfree (argv); | |
21139 | } | |
21140 | else | |
4d3c2250 | 21141 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21142 | } |
21143 | ||
cf2c3c16 TT |
21144 | /* Skip some bytes from BYTES according to the form given in FORM. |
21145 | Returns the new pointer. */ | |
2e276125 | 21146 | |
d521ce57 TT |
21147 | static const gdb_byte * |
21148 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
21149 | enum dwarf_form form, |
21150 | unsigned int offset_size, | |
21151 | struct dwarf2_section_info *section) | |
2e276125 | 21152 | { |
cf2c3c16 | 21153 | unsigned int bytes_read; |
2e276125 | 21154 | |
cf2c3c16 | 21155 | switch (form) |
2e276125 | 21156 | { |
cf2c3c16 TT |
21157 | case DW_FORM_data1: |
21158 | case DW_FORM_flag: | |
21159 | ++bytes; | |
21160 | break; | |
21161 | ||
21162 | case DW_FORM_data2: | |
21163 | bytes += 2; | |
21164 | break; | |
21165 | ||
21166 | case DW_FORM_data4: | |
21167 | bytes += 4; | |
21168 | break; | |
21169 | ||
21170 | case DW_FORM_data8: | |
21171 | bytes += 8; | |
21172 | break; | |
21173 | ||
21174 | case DW_FORM_string: | |
21175 | read_direct_string (abfd, bytes, &bytes_read); | |
21176 | bytes += bytes_read; | |
21177 | break; | |
21178 | ||
21179 | case DW_FORM_sec_offset: | |
21180 | case DW_FORM_strp: | |
36586728 | 21181 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
21182 | bytes += offset_size; |
21183 | break; | |
21184 | ||
21185 | case DW_FORM_block: | |
21186 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
21187 | bytes += bytes_read; | |
21188 | break; | |
21189 | ||
21190 | case DW_FORM_block1: | |
21191 | bytes += 1 + read_1_byte (abfd, bytes); | |
21192 | break; | |
21193 | case DW_FORM_block2: | |
21194 | bytes += 2 + read_2_bytes (abfd, bytes); | |
21195 | break; | |
21196 | case DW_FORM_block4: | |
21197 | bytes += 4 + read_4_bytes (abfd, bytes); | |
21198 | break; | |
21199 | ||
21200 | case DW_FORM_sdata: | |
21201 | case DW_FORM_udata: | |
3019eac3 DE |
21202 | case DW_FORM_GNU_addr_index: |
21203 | case DW_FORM_GNU_str_index: | |
d521ce57 | 21204 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
21205 | if (bytes == NULL) |
21206 | { | |
21207 | dwarf2_section_buffer_overflow_complaint (section); | |
21208 | return NULL; | |
21209 | } | |
cf2c3c16 TT |
21210 | break; |
21211 | ||
21212 | default: | |
21213 | { | |
21214 | complain: | |
21215 | complaint (&symfile_complaints, | |
21216 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 21217 | form, get_section_name (section)); |
cf2c3c16 TT |
21218 | return NULL; |
21219 | } | |
2e276125 JB |
21220 | } |
21221 | ||
cf2c3c16 TT |
21222 | return bytes; |
21223 | } | |
757a13d0 | 21224 | |
cf2c3c16 TT |
21225 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
21226 | opcode. Returns an updated pointer to the macro data buffer; or, | |
21227 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 21228 | |
d521ce57 | 21229 | static const gdb_byte * |
cf2c3c16 | 21230 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
21231 | const gdb_byte **opcode_definitions, |
21232 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
21233 | bfd *abfd, |
21234 | unsigned int offset_size, | |
21235 | struct dwarf2_section_info *section) | |
21236 | { | |
21237 | unsigned int bytes_read, i; | |
21238 | unsigned long arg; | |
d521ce57 | 21239 | const gdb_byte *defn; |
2e276125 | 21240 | |
cf2c3c16 | 21241 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 21242 | { |
cf2c3c16 TT |
21243 | complaint (&symfile_complaints, |
21244 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
21245 | opcode); | |
21246 | return NULL; | |
21247 | } | |
2e276125 | 21248 | |
cf2c3c16 TT |
21249 | defn = opcode_definitions[opcode]; |
21250 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
21251 | defn += bytes_read; | |
2e276125 | 21252 | |
cf2c3c16 TT |
21253 | for (i = 0; i < arg; ++i) |
21254 | { | |
aead7601 SM |
21255 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
21256 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 21257 | section); |
cf2c3c16 TT |
21258 | if (mac_ptr == NULL) |
21259 | { | |
21260 | /* skip_form_bytes already issued the complaint. */ | |
21261 | return NULL; | |
21262 | } | |
21263 | } | |
757a13d0 | 21264 | |
cf2c3c16 TT |
21265 | return mac_ptr; |
21266 | } | |
757a13d0 | 21267 | |
cf2c3c16 TT |
21268 | /* A helper function which parses the header of a macro section. |
21269 | If the macro section is the extended (for now called "GNU") type, | |
21270 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
21271 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 21272 | |
d521ce57 TT |
21273 | static const gdb_byte * |
21274 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 21275 | bfd *abfd, |
d521ce57 | 21276 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
21277 | unsigned int *offset_size, |
21278 | int section_is_gnu) | |
21279 | { | |
21280 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 21281 | |
cf2c3c16 TT |
21282 | if (section_is_gnu) |
21283 | { | |
21284 | unsigned int version, flags; | |
757a13d0 | 21285 | |
cf2c3c16 TT |
21286 | version = read_2_bytes (abfd, mac_ptr); |
21287 | if (version != 4) | |
21288 | { | |
21289 | complaint (&symfile_complaints, | |
21290 | _("unrecognized version `%d' in .debug_macro section"), | |
21291 | version); | |
21292 | return NULL; | |
21293 | } | |
21294 | mac_ptr += 2; | |
757a13d0 | 21295 | |
cf2c3c16 TT |
21296 | flags = read_1_byte (abfd, mac_ptr); |
21297 | ++mac_ptr; | |
21298 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 21299 | |
cf2c3c16 TT |
21300 | if ((flags & 2) != 0) |
21301 | /* We don't need the line table offset. */ | |
21302 | mac_ptr += *offset_size; | |
757a13d0 | 21303 | |
cf2c3c16 TT |
21304 | /* Vendor opcode descriptions. */ |
21305 | if ((flags & 4) != 0) | |
21306 | { | |
21307 | unsigned int i, count; | |
757a13d0 | 21308 | |
cf2c3c16 TT |
21309 | count = read_1_byte (abfd, mac_ptr); |
21310 | ++mac_ptr; | |
21311 | for (i = 0; i < count; ++i) | |
21312 | { | |
21313 | unsigned int opcode, bytes_read; | |
21314 | unsigned long arg; | |
21315 | ||
21316 | opcode = read_1_byte (abfd, mac_ptr); | |
21317 | ++mac_ptr; | |
21318 | opcode_definitions[opcode] = mac_ptr; | |
21319 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21320 | mac_ptr += bytes_read; | |
21321 | mac_ptr += arg; | |
21322 | } | |
757a13d0 | 21323 | } |
cf2c3c16 | 21324 | } |
757a13d0 | 21325 | |
cf2c3c16 TT |
21326 | return mac_ptr; |
21327 | } | |
757a13d0 | 21328 | |
cf2c3c16 | 21329 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 21330 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
21331 | |
21332 | static void | |
d521ce57 TT |
21333 | dwarf_decode_macro_bytes (bfd *abfd, |
21334 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 21335 | struct macro_source_file *current_file, |
43f3e411 | 21336 | struct line_header *lh, |
cf2c3c16 | 21337 | struct dwarf2_section_info *section, |
36586728 | 21338 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 21339 | unsigned int offset_size, |
8fc3fc34 | 21340 | htab_t include_hash) |
cf2c3c16 | 21341 | { |
4d663531 | 21342 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
21343 | enum dwarf_macro_record_type macinfo_type; |
21344 | int at_commandline; | |
d521ce57 | 21345 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 21346 | |
cf2c3c16 TT |
21347 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
21348 | &offset_size, section_is_gnu); | |
21349 | if (mac_ptr == NULL) | |
21350 | { | |
21351 | /* We already issued a complaint. */ | |
21352 | return; | |
21353 | } | |
757a13d0 JK |
21354 | |
21355 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
21356 | GDB is still reading the definitions from command line. First | |
21357 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
21358 | to create CURRENT_FILE for the main source holding also the command line | |
21359 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
21360 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
21361 | ||
21362 | at_commandline = 1; | |
21363 | ||
21364 | do | |
21365 | { | |
21366 | /* Do we at least have room for a macinfo type byte? */ | |
21367 | if (mac_ptr >= mac_end) | |
21368 | { | |
f664829e | 21369 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
21370 | break; |
21371 | } | |
21372 | ||
aead7601 | 21373 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
21374 | mac_ptr++; |
21375 | ||
cf2c3c16 TT |
21376 | /* Note that we rely on the fact that the corresponding GNU and |
21377 | DWARF constants are the same. */ | |
757a13d0 JK |
21378 | switch (macinfo_type) |
21379 | { | |
21380 | /* A zero macinfo type indicates the end of the macro | |
21381 | information. */ | |
21382 | case 0: | |
21383 | break; | |
2e276125 | 21384 | |
cf2c3c16 TT |
21385 | case DW_MACRO_GNU_define: |
21386 | case DW_MACRO_GNU_undef: | |
21387 | case DW_MACRO_GNU_define_indirect: | |
21388 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
21389 | case DW_MACRO_GNU_define_indirect_alt: |
21390 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 21391 | { |
891d2f0b | 21392 | unsigned int bytes_read; |
2e276125 | 21393 | int line; |
d521ce57 | 21394 | const char *body; |
cf2c3c16 | 21395 | int is_define; |
2e276125 | 21396 | |
cf2c3c16 TT |
21397 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
21398 | mac_ptr += bytes_read; | |
21399 | ||
21400 | if (macinfo_type == DW_MACRO_GNU_define | |
21401 | || macinfo_type == DW_MACRO_GNU_undef) | |
21402 | { | |
21403 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
21404 | mac_ptr += bytes_read; | |
21405 | } | |
21406 | else | |
21407 | { | |
21408 | LONGEST str_offset; | |
21409 | ||
21410 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
21411 | mac_ptr += offset_size; | |
2e276125 | 21412 | |
36586728 | 21413 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
21414 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
21415 | || section_is_dwz) | |
36586728 TT |
21416 | { |
21417 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
21418 | ||
21419 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
21420 | } | |
21421 | else | |
21422 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
21423 | } |
21424 | ||
21425 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
21426 | || macinfo_type == DW_MACRO_GNU_define_indirect |
21427 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 21428 | if (! current_file) |
757a13d0 JK |
21429 | { |
21430 | /* DWARF violation as no main source is present. */ | |
21431 | complaint (&symfile_complaints, | |
21432 | _("debug info with no main source gives macro %s " | |
21433 | "on line %d: %s"), | |
cf2c3c16 TT |
21434 | is_define ? _("definition") : _("undefinition"), |
21435 | line, body); | |
757a13d0 JK |
21436 | break; |
21437 | } | |
3e43a32a MS |
21438 | if ((line == 0 && !at_commandline) |
21439 | || (line != 0 && at_commandline)) | |
4d3c2250 | 21440 | complaint (&symfile_complaints, |
757a13d0 JK |
21441 | _("debug info gives %s macro %s with %s line %d: %s"), |
21442 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 21443 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
21444 | line == 0 ? _("zero") : _("non-zero"), line, body); |
21445 | ||
cf2c3c16 | 21446 | if (is_define) |
757a13d0 | 21447 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
21448 | else |
21449 | { | |
21450 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
21451 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
21452 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
21453 | macro_undef (current_file, line, body); |
21454 | } | |
2e276125 JB |
21455 | } |
21456 | break; | |
21457 | ||
cf2c3c16 | 21458 | case DW_MACRO_GNU_start_file: |
2e276125 | 21459 | { |
891d2f0b | 21460 | unsigned int bytes_read; |
2e276125 JB |
21461 | int line, file; |
21462 | ||
21463 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21464 | mac_ptr += bytes_read; | |
21465 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21466 | mac_ptr += bytes_read; | |
21467 | ||
3e43a32a MS |
21468 | if ((line == 0 && !at_commandline) |
21469 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
21470 | complaint (&symfile_complaints, |
21471 | _("debug info gives source %d included " | |
21472 | "from %s at %s line %d"), | |
21473 | file, at_commandline ? _("command-line") : _("file"), | |
21474 | line == 0 ? _("zero") : _("non-zero"), line); | |
21475 | ||
21476 | if (at_commandline) | |
21477 | { | |
cf2c3c16 TT |
21478 | /* This DW_MACRO_GNU_start_file was executed in the |
21479 | pass one. */ | |
757a13d0 JK |
21480 | at_commandline = 0; |
21481 | } | |
21482 | else | |
43f3e411 | 21483 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
21484 | } |
21485 | break; | |
21486 | ||
cf2c3c16 | 21487 | case DW_MACRO_GNU_end_file: |
2e276125 | 21488 | if (! current_file) |
4d3c2250 | 21489 | complaint (&symfile_complaints, |
3e43a32a MS |
21490 | _("macro debug info has an unmatched " |
21491 | "`close_file' directive")); | |
2e276125 JB |
21492 | else |
21493 | { | |
21494 | current_file = current_file->included_by; | |
21495 | if (! current_file) | |
21496 | { | |
cf2c3c16 | 21497 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
21498 | |
21499 | /* GCC circa March 2002 doesn't produce the zero | |
21500 | type byte marking the end of the compilation | |
21501 | unit. Complain if it's not there, but exit no | |
21502 | matter what. */ | |
21503 | ||
21504 | /* Do we at least have room for a macinfo type byte? */ | |
21505 | if (mac_ptr >= mac_end) | |
21506 | { | |
f664829e | 21507 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
21508 | return; |
21509 | } | |
21510 | ||
21511 | /* We don't increment mac_ptr here, so this is just | |
21512 | a look-ahead. */ | |
aead7601 SM |
21513 | next_type |
21514 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
21515 | mac_ptr); | |
2e276125 | 21516 | if (next_type != 0) |
4d3c2250 | 21517 | complaint (&symfile_complaints, |
3e43a32a MS |
21518 | _("no terminating 0-type entry for " |
21519 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
21520 | |
21521 | return; | |
21522 | } | |
21523 | } | |
21524 | break; | |
21525 | ||
cf2c3c16 | 21526 | case DW_MACRO_GNU_transparent_include: |
36586728 | 21527 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21528 | { |
21529 | LONGEST offset; | |
8fc3fc34 | 21530 | void **slot; |
a036ba48 TT |
21531 | bfd *include_bfd = abfd; |
21532 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 21533 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 21534 | int is_dwz = section_is_dwz; |
d521ce57 | 21535 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
21536 | |
21537 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
21538 | mac_ptr += offset_size; | |
21539 | ||
a036ba48 TT |
21540 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
21541 | { | |
21542 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
21543 | ||
4d663531 | 21544 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 21545 | |
a036ba48 | 21546 | include_section = &dwz->macro; |
a32a8923 | 21547 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
21548 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
21549 | is_dwz = 1; | |
21550 | } | |
21551 | ||
21552 | new_mac_ptr = include_section->buffer + offset; | |
21553 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
21554 | ||
8fc3fc34 TT |
21555 | if (*slot != NULL) |
21556 | { | |
21557 | /* This has actually happened; see | |
21558 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
21559 | complaint (&symfile_complaints, | |
21560 | _("recursive DW_MACRO_GNU_transparent_include in " | |
21561 | ".debug_macro section")); | |
21562 | } | |
21563 | else | |
21564 | { | |
d521ce57 | 21565 | *slot = (void *) new_mac_ptr; |
36586728 | 21566 | |
a036ba48 | 21567 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 21568 | include_mac_end, current_file, lh, |
36586728 | 21569 | section, section_is_gnu, is_dwz, |
4d663531 | 21570 | offset_size, include_hash); |
8fc3fc34 | 21571 | |
d521ce57 | 21572 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 21573 | } |
cf2c3c16 TT |
21574 | } |
21575 | break; | |
21576 | ||
2e276125 | 21577 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
21578 | if (!section_is_gnu) |
21579 | { | |
21580 | unsigned int bytes_read; | |
21581 | int constant; | |
2e276125 | 21582 | |
cf2c3c16 TT |
21583 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
21584 | mac_ptr += bytes_read; | |
21585 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21586 | mac_ptr += bytes_read; | |
2e276125 | 21587 | |
cf2c3c16 TT |
21588 | /* We don't recognize any vendor extensions. */ |
21589 | break; | |
21590 | } | |
21591 | /* FALLTHROUGH */ | |
21592 | ||
21593 | default: | |
21594 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21595 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21596 | section); |
21597 | if (mac_ptr == NULL) | |
21598 | return; | |
21599 | break; | |
2e276125 | 21600 | } |
757a13d0 | 21601 | } while (macinfo_type != 0); |
2e276125 | 21602 | } |
8e19ed76 | 21603 | |
cf2c3c16 | 21604 | static void |
09262596 | 21605 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 21606 | int section_is_gnu) |
cf2c3c16 | 21607 | { |
bb5ed363 | 21608 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
21609 | struct line_header *lh = cu->line_header; |
21610 | bfd *abfd; | |
d521ce57 | 21611 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
21612 | struct macro_source_file *current_file = 0; |
21613 | enum dwarf_macro_record_type macinfo_type; | |
21614 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 21615 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
21616 | struct cleanup *cleanup; |
21617 | htab_t include_hash; | |
21618 | void **slot; | |
09262596 DE |
21619 | struct dwarf2_section_info *section; |
21620 | const char *section_name; | |
21621 | ||
21622 | if (cu->dwo_unit != NULL) | |
21623 | { | |
21624 | if (section_is_gnu) | |
21625 | { | |
21626 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
21627 | section_name = ".debug_macro.dwo"; | |
21628 | } | |
21629 | else | |
21630 | { | |
21631 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
21632 | section_name = ".debug_macinfo.dwo"; | |
21633 | } | |
21634 | } | |
21635 | else | |
21636 | { | |
21637 | if (section_is_gnu) | |
21638 | { | |
21639 | section = &dwarf2_per_objfile->macro; | |
21640 | section_name = ".debug_macro"; | |
21641 | } | |
21642 | else | |
21643 | { | |
21644 | section = &dwarf2_per_objfile->macinfo; | |
21645 | section_name = ".debug_macinfo"; | |
21646 | } | |
21647 | } | |
cf2c3c16 | 21648 | |
bb5ed363 | 21649 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
21650 | if (section->buffer == NULL) |
21651 | { | |
fceca515 | 21652 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
21653 | return; |
21654 | } | |
a32a8923 | 21655 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
21656 | |
21657 | /* First pass: Find the name of the base filename. | |
21658 | This filename is needed in order to process all macros whose definition | |
21659 | (or undefinition) comes from the command line. These macros are defined | |
21660 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
21661 | associated to the base file. | |
21662 | ||
21663 | To determine the base file name, we scan the macro definitions until we | |
21664 | reach the first DW_MACINFO_start_file entry. We then initialize | |
21665 | CURRENT_FILE accordingly so that any macro definition found before the | |
21666 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
21667 | ||
21668 | mac_ptr = section->buffer + offset; | |
21669 | mac_end = section->buffer + section->size; | |
21670 | ||
21671 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
21672 | &offset_size, section_is_gnu); | |
21673 | if (mac_ptr == NULL) | |
21674 | { | |
21675 | /* We already issued a complaint. */ | |
21676 | return; | |
21677 | } | |
21678 | ||
21679 | do | |
21680 | { | |
21681 | /* Do we at least have room for a macinfo type byte? */ | |
21682 | if (mac_ptr >= mac_end) | |
21683 | { | |
21684 | /* Complaint is printed during the second pass as GDB will probably | |
21685 | stop the first pass earlier upon finding | |
21686 | DW_MACINFO_start_file. */ | |
21687 | break; | |
21688 | } | |
21689 | ||
aead7601 | 21690 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
21691 | mac_ptr++; |
21692 | ||
21693 | /* Note that we rely on the fact that the corresponding GNU and | |
21694 | DWARF constants are the same. */ | |
21695 | switch (macinfo_type) | |
21696 | { | |
21697 | /* A zero macinfo type indicates the end of the macro | |
21698 | information. */ | |
21699 | case 0: | |
21700 | break; | |
21701 | ||
21702 | case DW_MACRO_GNU_define: | |
21703 | case DW_MACRO_GNU_undef: | |
21704 | /* Only skip the data by MAC_PTR. */ | |
21705 | { | |
21706 | unsigned int bytes_read; | |
21707 | ||
21708 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21709 | mac_ptr += bytes_read; | |
21710 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21711 | mac_ptr += bytes_read; | |
21712 | } | |
21713 | break; | |
21714 | ||
21715 | case DW_MACRO_GNU_start_file: | |
21716 | { | |
21717 | unsigned int bytes_read; | |
21718 | int line, file; | |
21719 | ||
21720 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21721 | mac_ptr += bytes_read; | |
21722 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21723 | mac_ptr += bytes_read; | |
21724 | ||
43f3e411 | 21725 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
21726 | } |
21727 | break; | |
21728 | ||
21729 | case DW_MACRO_GNU_end_file: | |
21730 | /* No data to skip by MAC_PTR. */ | |
21731 | break; | |
21732 | ||
21733 | case DW_MACRO_GNU_define_indirect: | |
21734 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
21735 | case DW_MACRO_GNU_define_indirect_alt: |
21736 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
21737 | { |
21738 | unsigned int bytes_read; | |
21739 | ||
21740 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21741 | mac_ptr += bytes_read; | |
21742 | mac_ptr += offset_size; | |
21743 | } | |
21744 | break; | |
21745 | ||
21746 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 21747 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21748 | /* Note that, according to the spec, a transparent include |
21749 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
21750 | skip this opcode. */ | |
21751 | mac_ptr += offset_size; | |
21752 | break; | |
21753 | ||
21754 | case DW_MACINFO_vendor_ext: | |
21755 | /* Only skip the data by MAC_PTR. */ | |
21756 | if (!section_is_gnu) | |
21757 | { | |
21758 | unsigned int bytes_read; | |
21759 | ||
21760 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21761 | mac_ptr += bytes_read; | |
21762 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21763 | mac_ptr += bytes_read; | |
21764 | } | |
21765 | /* FALLTHROUGH */ | |
21766 | ||
21767 | default: | |
21768 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21769 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21770 | section); |
21771 | if (mac_ptr == NULL) | |
21772 | return; | |
21773 | break; | |
21774 | } | |
21775 | } while (macinfo_type != 0 && current_file == NULL); | |
21776 | ||
21777 | /* Second pass: Process all entries. | |
21778 | ||
21779 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
21780 | command-line macro definitions/undefinitions. This flag is unset when we | |
21781 | reach the first DW_MACINFO_start_file entry. */ | |
21782 | ||
8fc3fc34 TT |
21783 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
21784 | NULL, xcalloc, xfree); | |
21785 | cleanup = make_cleanup_htab_delete (include_hash); | |
21786 | mac_ptr = section->buffer + offset; | |
21787 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 21788 | *slot = (void *) mac_ptr; |
8fc3fc34 | 21789 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 21790 | current_file, lh, section, |
4d663531 | 21791 | section_is_gnu, 0, offset_size, include_hash); |
8fc3fc34 | 21792 | do_cleanups (cleanup); |
cf2c3c16 TT |
21793 | } |
21794 | ||
8e19ed76 | 21795 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 21796 | if so return true else false. */ |
380bca97 | 21797 | |
8e19ed76 | 21798 | static int |
6e5a29e1 | 21799 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
21800 | { |
21801 | return (attr == NULL ? 0 : | |
21802 | attr->form == DW_FORM_block1 | |
21803 | || attr->form == DW_FORM_block2 | |
21804 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
21805 | || attr->form == DW_FORM_block |
21806 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 21807 | } |
4c2df51b | 21808 | |
c6a0999f JB |
21809 | /* Return non-zero if ATTR's value is a section offset --- classes |
21810 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
21811 | You may use DW_UNSND (attr) to retrieve such offsets. | |
21812 | ||
21813 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
21814 | may have a value that belongs to more than one of these classes; it | |
21815 | would be ambiguous if we did, because we use the same forms for all | |
21816 | of them. */ | |
380bca97 | 21817 | |
3690dd37 | 21818 | static int |
6e5a29e1 | 21819 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
21820 | { |
21821 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
21822 | || attr->form == DW_FORM_data8 |
21823 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
21824 | } |
21825 | ||
3690dd37 JB |
21826 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
21827 | zero otherwise. When this function returns true, you can apply | |
21828 | dwarf2_get_attr_constant_value to it. | |
21829 | ||
21830 | However, note that for some attributes you must check | |
21831 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
21832 | and DW_FORM_data8 are members of both the constant class, and of | |
21833 | the classes that contain offsets into other debug sections | |
21834 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
21835 | that, if an attribute's can be either a constant or one of the | |
21836 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
21837 | taken as section offsets, not constants. */ | |
380bca97 | 21838 | |
3690dd37 | 21839 | static int |
6e5a29e1 | 21840 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
21841 | { |
21842 | switch (attr->form) | |
21843 | { | |
21844 | case DW_FORM_sdata: | |
21845 | case DW_FORM_udata: | |
21846 | case DW_FORM_data1: | |
21847 | case DW_FORM_data2: | |
21848 | case DW_FORM_data4: | |
21849 | case DW_FORM_data8: | |
21850 | return 1; | |
21851 | default: | |
21852 | return 0; | |
21853 | } | |
21854 | } | |
21855 | ||
7771576e SA |
21856 | |
21857 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
21858 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
21859 | ||
21860 | static int | |
6e5a29e1 | 21861 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
21862 | { |
21863 | switch (attr->form) | |
21864 | { | |
21865 | case DW_FORM_ref_addr: | |
21866 | case DW_FORM_ref1: | |
21867 | case DW_FORM_ref2: | |
21868 | case DW_FORM_ref4: | |
21869 | case DW_FORM_ref8: | |
21870 | case DW_FORM_ref_udata: | |
21871 | case DW_FORM_GNU_ref_alt: | |
21872 | return 1; | |
21873 | default: | |
21874 | return 0; | |
21875 | } | |
21876 | } | |
21877 | ||
3019eac3 DE |
21878 | /* Return the .debug_loc section to use for CU. |
21879 | For DWO files use .debug_loc.dwo. */ | |
21880 | ||
21881 | static struct dwarf2_section_info * | |
21882 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
21883 | { | |
21884 | if (cu->dwo_unit) | |
21885 | return &cu->dwo_unit->dwo_file->sections.loc; | |
21886 | return &dwarf2_per_objfile->loc; | |
21887 | } | |
21888 | ||
8cf6f0b1 TT |
21889 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
21890 | ||
21891 | static void | |
21892 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
21893 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 21894 | const struct attribute *attr) |
8cf6f0b1 | 21895 | { |
3019eac3 DE |
21896 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
21897 | ||
21898 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
21899 | |
21900 | baton->per_cu = cu->per_cu; | |
21901 | gdb_assert (baton->per_cu); | |
21902 | /* We don't know how long the location list is, but make sure we | |
21903 | don't run off the edge of the section. */ | |
3019eac3 DE |
21904 | baton->size = section->size - DW_UNSND (attr); |
21905 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 21906 | baton->base_address = cu->base_address; |
f664829e | 21907 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
21908 | } |
21909 | ||
4c2df51b | 21910 | static void |
ff39bb5e | 21911 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 21912 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 21913 | { |
bb5ed363 | 21914 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 21915 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 21916 | |
3690dd37 | 21917 | if (attr_form_is_section_offset (attr) |
3019eac3 | 21918 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
21919 | the section. If so, fall through to the complaint in the |
21920 | other branch. */ | |
3019eac3 | 21921 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 21922 | { |
0d53c4c4 | 21923 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 21924 | |
8d749320 | 21925 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 21926 | |
8cf6f0b1 | 21927 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 21928 | |
d00adf39 | 21929 | if (cu->base_known == 0) |
0d53c4c4 | 21930 | complaint (&symfile_complaints, |
3e43a32a MS |
21931 | _("Location list used without " |
21932 | "specifying the CU base address.")); | |
4c2df51b | 21933 | |
f1e6e072 TT |
21934 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21935 | ? dwarf2_loclist_block_index | |
21936 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
21937 | SYMBOL_LOCATION_BATON (sym) = baton; |
21938 | } | |
21939 | else | |
21940 | { | |
21941 | struct dwarf2_locexpr_baton *baton; | |
21942 | ||
8d749320 | 21943 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
21944 | baton->per_cu = cu->per_cu; |
21945 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
21946 | |
21947 | if (attr_form_is_block (attr)) | |
21948 | { | |
21949 | /* Note that we're just copying the block's data pointer | |
21950 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
21951 | info_buffer for SYM's objfile; right now we never release |
21952 | that buffer, but when we do clean up properly this may | |
21953 | need to change. */ | |
0d53c4c4 DJ |
21954 | baton->size = DW_BLOCK (attr)->size; |
21955 | baton->data = DW_BLOCK (attr)->data; | |
21956 | } | |
21957 | else | |
21958 | { | |
21959 | dwarf2_invalid_attrib_class_complaint ("location description", | |
21960 | SYMBOL_NATURAL_NAME (sym)); | |
21961 | baton->size = 0; | |
0d53c4c4 | 21962 | } |
6e70227d | 21963 | |
f1e6e072 TT |
21964 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21965 | ? dwarf2_locexpr_block_index | |
21966 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
21967 | SYMBOL_LOCATION_BATON (sym) = baton; |
21968 | } | |
4c2df51b | 21969 | } |
6502dd73 | 21970 | |
9aa1f1e3 TT |
21971 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
21972 | came from a separate debuginfo file, then the master objfile is | |
21973 | returned. */ | |
ae0d2f24 UW |
21974 | |
21975 | struct objfile * | |
21976 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
21977 | { | |
9291a0cd | 21978 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
21979 | |
21980 | /* Return the master objfile, so that we can report and look up the | |
21981 | correct file containing this variable. */ | |
21982 | if (objfile->separate_debug_objfile_backlink) | |
21983 | objfile = objfile->separate_debug_objfile_backlink; | |
21984 | ||
21985 | return objfile; | |
21986 | } | |
21987 | ||
96408a79 SA |
21988 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
21989 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
21990 | CU_HEADERP first. */ | |
21991 | ||
21992 | static const struct comp_unit_head * | |
21993 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
21994 | struct dwarf2_per_cu_data *per_cu) | |
21995 | { | |
d521ce57 | 21996 | const gdb_byte *info_ptr; |
96408a79 SA |
21997 | |
21998 | if (per_cu->cu) | |
21999 | return &per_cu->cu->header; | |
22000 | ||
8a0459fd | 22001 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
22002 | |
22003 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 22004 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
22005 | |
22006 | return cu_headerp; | |
22007 | } | |
22008 | ||
ae0d2f24 UW |
22009 | /* Return the address size given in the compilation unit header for CU. */ |
22010 | ||
98714339 | 22011 | int |
ae0d2f24 UW |
22012 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
22013 | { | |
96408a79 SA |
22014 | struct comp_unit_head cu_header_local; |
22015 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 22016 | |
96408a79 SA |
22017 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22018 | ||
22019 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
22020 | } |
22021 | ||
9eae7c52 TT |
22022 | /* Return the offset size given in the compilation unit header for CU. */ |
22023 | ||
22024 | int | |
22025 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
22026 | { | |
96408a79 SA |
22027 | struct comp_unit_head cu_header_local; |
22028 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 22029 | |
96408a79 SA |
22030 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22031 | ||
22032 | return cu_headerp->offset_size; | |
22033 | } | |
22034 | ||
22035 | /* See its dwarf2loc.h declaration. */ | |
22036 | ||
22037 | int | |
22038 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
22039 | { | |
22040 | struct comp_unit_head cu_header_local; | |
22041 | const struct comp_unit_head *cu_headerp; | |
22042 | ||
22043 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
22044 | ||
22045 | if (cu_headerp->version == 2) | |
22046 | return cu_headerp->addr_size; | |
22047 | else | |
22048 | return cu_headerp->offset_size; | |
181cebd4 JK |
22049 | } |
22050 | ||
9aa1f1e3 TT |
22051 | /* Return the text offset of the CU. The returned offset comes from |
22052 | this CU's objfile. If this objfile came from a separate debuginfo | |
22053 | file, then the offset may be different from the corresponding | |
22054 | offset in the parent objfile. */ | |
22055 | ||
22056 | CORE_ADDR | |
22057 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
22058 | { | |
bb3fa9d0 | 22059 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
22060 | |
22061 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22062 | } | |
22063 | ||
348e048f DE |
22064 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
22065 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
22066 | |
22067 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 22068 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 22069 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
22070 | struct objfile *objfile) |
22071 | { | |
22072 | struct dwarf2_per_cu_data *this_cu; | |
22073 | int low, high; | |
36586728 | 22074 | const sect_offset *cu_off; |
ae038cb0 | 22075 | |
ae038cb0 DJ |
22076 | low = 0; |
22077 | high = dwarf2_per_objfile->n_comp_units - 1; | |
22078 | while (high > low) | |
22079 | { | |
36586728 | 22080 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 22081 | int mid = low + (high - low) / 2; |
9a619af0 | 22082 | |
36586728 TT |
22083 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
22084 | cu_off = &mid_cu->offset; | |
22085 | if (mid_cu->is_dwz > offset_in_dwz | |
22086 | || (mid_cu->is_dwz == offset_in_dwz | |
22087 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
22088 | high = mid; |
22089 | else | |
22090 | low = mid + 1; | |
22091 | } | |
22092 | gdb_assert (low == high); | |
36586728 TT |
22093 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
22094 | cu_off = &this_cu->offset; | |
22095 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 22096 | { |
36586728 | 22097 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
22098 | error (_("Dwarf Error: could not find partial DIE containing " |
22099 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 22100 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 22101 | |
b64f50a1 JK |
22102 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
22103 | <= offset.sect_off); | |
ae038cb0 DJ |
22104 | return dwarf2_per_objfile->all_comp_units[low-1]; |
22105 | } | |
22106 | else | |
22107 | { | |
22108 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
22109 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
22110 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
22111 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
22112 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
22113 | return this_cu; |
22114 | } | |
22115 | } | |
22116 | ||
23745b47 | 22117 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 22118 | |
9816fde3 | 22119 | static void |
23745b47 | 22120 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 22121 | { |
9816fde3 | 22122 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
22123 | per_cu->cu = cu; |
22124 | cu->per_cu = per_cu; | |
22125 | cu->objfile = per_cu->objfile; | |
93311388 | 22126 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
22127 | } |
22128 | ||
22129 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
22130 | ||
22131 | static void | |
95554aad TT |
22132 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
22133 | enum language pretend_language) | |
9816fde3 JK |
22134 | { |
22135 | struct attribute *attr; | |
22136 | ||
22137 | /* Set the language we're debugging. */ | |
22138 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
22139 | if (attr) | |
22140 | set_cu_language (DW_UNSND (attr), cu); | |
22141 | else | |
9cded63f | 22142 | { |
95554aad | 22143 | cu->language = pretend_language; |
9cded63f TT |
22144 | cu->language_defn = language_def (cu->language); |
22145 | } | |
dee91e82 | 22146 | |
7d45c7c3 | 22147 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
22148 | } |
22149 | ||
ae038cb0 DJ |
22150 | /* Release one cached compilation unit, CU. We unlink it from the tree |
22151 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
22152 | the caller is responsible for that. |
22153 | NOTE: DATA is a void * because this function is also used as a | |
22154 | cleanup routine. */ | |
ae038cb0 DJ |
22155 | |
22156 | static void | |
68dc6402 | 22157 | free_heap_comp_unit (void *data) |
ae038cb0 | 22158 | { |
9a3c8263 | 22159 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 22160 | |
23745b47 DE |
22161 | gdb_assert (cu->per_cu != NULL); |
22162 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
22163 | cu->per_cu = NULL; |
22164 | ||
22165 | obstack_free (&cu->comp_unit_obstack, NULL); | |
22166 | ||
22167 | xfree (cu); | |
22168 | } | |
22169 | ||
72bf9492 | 22170 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 22171 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 22172 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
22173 | |
22174 | static void | |
22175 | free_stack_comp_unit (void *data) | |
22176 | { | |
9a3c8263 | 22177 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 22178 | |
23745b47 DE |
22179 | gdb_assert (cu->per_cu != NULL); |
22180 | cu->per_cu->cu = NULL; | |
22181 | cu->per_cu = NULL; | |
22182 | ||
72bf9492 DJ |
22183 | obstack_free (&cu->comp_unit_obstack, NULL); |
22184 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
22185 | } |
22186 | ||
22187 | /* Free all cached compilation units. */ | |
22188 | ||
22189 | static void | |
22190 | free_cached_comp_units (void *data) | |
22191 | { | |
22192 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22193 | ||
22194 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22195 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22196 | while (per_cu != NULL) | |
22197 | { | |
22198 | struct dwarf2_per_cu_data *next_cu; | |
22199 | ||
22200 | next_cu = per_cu->cu->read_in_chain; | |
22201 | ||
68dc6402 | 22202 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22203 | *last_chain = next_cu; |
22204 | ||
22205 | per_cu = next_cu; | |
22206 | } | |
22207 | } | |
22208 | ||
22209 | /* Increase the age counter on each cached compilation unit, and free | |
22210 | any that are too old. */ | |
22211 | ||
22212 | static void | |
22213 | age_cached_comp_units (void) | |
22214 | { | |
22215 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22216 | ||
22217 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
22218 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22219 | while (per_cu != NULL) | |
22220 | { | |
22221 | per_cu->cu->last_used ++; | |
b4f54984 | 22222 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
22223 | dwarf2_mark (per_cu->cu); |
22224 | per_cu = per_cu->cu->read_in_chain; | |
22225 | } | |
22226 | ||
22227 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22228 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22229 | while (per_cu != NULL) | |
22230 | { | |
22231 | struct dwarf2_per_cu_data *next_cu; | |
22232 | ||
22233 | next_cu = per_cu->cu->read_in_chain; | |
22234 | ||
22235 | if (!per_cu->cu->mark) | |
22236 | { | |
68dc6402 | 22237 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22238 | *last_chain = next_cu; |
22239 | } | |
22240 | else | |
22241 | last_chain = &per_cu->cu->read_in_chain; | |
22242 | ||
22243 | per_cu = next_cu; | |
22244 | } | |
22245 | } | |
22246 | ||
22247 | /* Remove a single compilation unit from the cache. */ | |
22248 | ||
22249 | static void | |
dee91e82 | 22250 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
22251 | { |
22252 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22253 | ||
22254 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22255 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22256 | while (per_cu != NULL) | |
22257 | { | |
22258 | struct dwarf2_per_cu_data *next_cu; | |
22259 | ||
22260 | next_cu = per_cu->cu->read_in_chain; | |
22261 | ||
dee91e82 | 22262 | if (per_cu == target_per_cu) |
ae038cb0 | 22263 | { |
68dc6402 | 22264 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 22265 | per_cu->cu = NULL; |
ae038cb0 DJ |
22266 | *last_chain = next_cu; |
22267 | break; | |
22268 | } | |
22269 | else | |
22270 | last_chain = &per_cu->cu->read_in_chain; | |
22271 | ||
22272 | per_cu = next_cu; | |
22273 | } | |
22274 | } | |
22275 | ||
fe3e1990 DJ |
22276 | /* Release all extra memory associated with OBJFILE. */ |
22277 | ||
22278 | void | |
22279 | dwarf2_free_objfile (struct objfile *objfile) | |
22280 | { | |
9a3c8263 SM |
22281 | dwarf2_per_objfile |
22282 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
22283 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
22284 | |
22285 | if (dwarf2_per_objfile == NULL) | |
22286 | return; | |
22287 | ||
22288 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
22289 | free_cached_comp_units (NULL); | |
22290 | ||
7b9f3c50 DE |
22291 | if (dwarf2_per_objfile->quick_file_names_table) |
22292 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 22293 | |
527f3840 JK |
22294 | if (dwarf2_per_objfile->line_header_hash) |
22295 | htab_delete (dwarf2_per_objfile->line_header_hash); | |
22296 | ||
fe3e1990 DJ |
22297 | /* Everything else should be on the objfile obstack. */ |
22298 | } | |
22299 | ||
dee91e82 DE |
22300 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
22301 | We store these in a hash table separate from the DIEs, and preserve them | |
22302 | when the DIEs are flushed out of cache. | |
22303 | ||
22304 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 22305 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
22306 | or the type may come from a DWO file. Furthermore, while it's more logical |
22307 | to use per_cu->section+offset, with Fission the section with the data is in | |
22308 | the DWO file but we don't know that section at the point we need it. | |
22309 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
22310 | because we can enter the lookup routine, get_die_type_at_offset, from | |
22311 | outside this file, and thus won't necessarily have PER_CU->cu. | |
22312 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 22313 | |
dee91e82 | 22314 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 22315 | { |
dee91e82 | 22316 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 22317 | sect_offset offset; |
1c379e20 DJ |
22318 | struct type *type; |
22319 | }; | |
22320 | ||
dee91e82 | 22321 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22322 | |
22323 | static hashval_t | |
dee91e82 | 22324 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 22325 | { |
9a3c8263 SM |
22326 | const struct dwarf2_per_cu_offset_and_type *ofs |
22327 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 22328 | |
dee91e82 | 22329 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
22330 | } |
22331 | ||
dee91e82 | 22332 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
22333 | |
22334 | static int | |
dee91e82 | 22335 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 22336 | { |
9a3c8263 SM |
22337 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
22338 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
22339 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
22340 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 22341 | |
dee91e82 DE |
22342 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
22343 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
22344 | } |
22345 | ||
22346 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
22347 | table if necessary. For convenience, return TYPE. |
22348 | ||
22349 | The DIEs reading must have careful ordering to: | |
22350 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
22351 | reading current DIE. | |
22352 | * Not trying to dereference contents of still incompletely read in types | |
22353 | while reading in other DIEs. | |
22354 | * Enable referencing still incompletely read in types just by a pointer to | |
22355 | the type without accessing its fields. | |
22356 | ||
22357 | Therefore caller should follow these rules: | |
22358 | * Try to fetch any prerequisite types we may need to build this DIE type | |
22359 | before building the type and calling set_die_type. | |
e71ec853 | 22360 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
22361 | possible before fetching more types to complete the current type. |
22362 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 22363 | |
f792889a | 22364 | static struct type * |
1c379e20 DJ |
22365 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
22366 | { | |
dee91e82 | 22367 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 22368 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
22369 | struct attribute *attr; |
22370 | struct dynamic_prop prop; | |
1c379e20 | 22371 | |
b4ba55a1 JB |
22372 | /* For Ada types, make sure that the gnat-specific data is always |
22373 | initialized (if not already set). There are a few types where | |
22374 | we should not be doing so, because the type-specific area is | |
22375 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
22376 | where the type-specific area is used to store the floatformat). | |
22377 | But this is not a problem, because the gnat-specific information | |
22378 | is actually not needed for these types. */ | |
22379 | if (need_gnat_info (cu) | |
22380 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
22381 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
22382 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
22383 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
22384 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
22385 | && !HAVE_GNAT_AUX_INFO (type)) |
22386 | INIT_GNAT_SPECIFIC (type); | |
22387 | ||
3f2f83dd KB |
22388 | /* Read DW_AT_allocated and set in type. */ |
22389 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
22390 | if (attr_form_is_block (attr)) | |
22391 | { | |
22392 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
22393 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
22394 | } | |
22395 | else if (attr != NULL) | |
22396 | { | |
22397 | complaint (&symfile_complaints, | |
22398 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), | |
22399 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
22400 | die->offset.sect_off); | |
22401 | } | |
22402 | ||
22403 | /* Read DW_AT_associated and set in type. */ | |
22404 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
22405 | if (attr_form_is_block (attr)) | |
22406 | { | |
22407 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
22408 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
22409 | } | |
22410 | else if (attr != NULL) | |
22411 | { | |
22412 | complaint (&symfile_complaints, | |
22413 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), | |
22414 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
22415 | die->offset.sect_off); | |
22416 | } | |
22417 | ||
3cdcd0ce JB |
22418 | /* Read DW_AT_data_location and set in type. */ |
22419 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
22420 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 22421 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 22422 | |
dee91e82 | 22423 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 22424 | { |
dee91e82 DE |
22425 | dwarf2_per_objfile->die_type_hash = |
22426 | htab_create_alloc_ex (127, | |
22427 | per_cu_offset_and_type_hash, | |
22428 | per_cu_offset_and_type_eq, | |
22429 | NULL, | |
22430 | &objfile->objfile_obstack, | |
22431 | hashtab_obstack_allocate, | |
22432 | dummy_obstack_deallocate); | |
f792889a | 22433 | } |
1c379e20 | 22434 | |
dee91e82 | 22435 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
22436 | ofs.offset = die->offset; |
22437 | ofs.type = type; | |
dee91e82 DE |
22438 | slot = (struct dwarf2_per_cu_offset_and_type **) |
22439 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
22440 | if (*slot) |
22441 | complaint (&symfile_complaints, | |
22442 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 22443 | die->offset.sect_off); |
8d749320 SM |
22444 | *slot = XOBNEW (&objfile->objfile_obstack, |
22445 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 22446 | **slot = ofs; |
f792889a | 22447 | return type; |
1c379e20 DJ |
22448 | } |
22449 | ||
02142a6c DE |
22450 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
22451 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
22452 | |
22453 | static struct type * | |
b64f50a1 | 22454 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 22455 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 22456 | { |
dee91e82 | 22457 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 22458 | |
dee91e82 | 22459 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 22460 | return NULL; |
1c379e20 | 22461 | |
dee91e82 | 22462 | ofs.per_cu = per_cu; |
673bfd45 | 22463 | ofs.offset = offset; |
9a3c8263 SM |
22464 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
22465 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
22466 | if (slot) |
22467 | return slot->type; | |
22468 | else | |
22469 | return NULL; | |
22470 | } | |
22471 | ||
02142a6c | 22472 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
22473 | or return NULL if DIE does not have a saved type. */ |
22474 | ||
22475 | static struct type * | |
22476 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
22477 | { | |
22478 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
22479 | } | |
22480 | ||
10b3939b DJ |
22481 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
22482 | ||
22483 | static void | |
22484 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
22485 | struct dwarf2_per_cu_data *ref_per_cu) | |
22486 | { | |
22487 | void **slot; | |
22488 | ||
22489 | if (cu->dependencies == NULL) | |
22490 | cu->dependencies | |
22491 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
22492 | NULL, &cu->comp_unit_obstack, | |
22493 | hashtab_obstack_allocate, | |
22494 | dummy_obstack_deallocate); | |
22495 | ||
22496 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
22497 | if (*slot == NULL) | |
22498 | *slot = ref_per_cu; | |
22499 | } | |
1c379e20 | 22500 | |
f504f079 DE |
22501 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
22502 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
22503 | cache that we must keep because we are keeping CU. */ |
22504 | ||
10b3939b DJ |
22505 | static int |
22506 | dwarf2_mark_helper (void **slot, void *data) | |
22507 | { | |
22508 | struct dwarf2_per_cu_data *per_cu; | |
22509 | ||
22510 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
22511 | |
22512 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
22513 | reading of the chain. As such dependencies remain valid it is not much | |
22514 | useful to track and undo them during QUIT cleanups. */ | |
22515 | if (per_cu->cu == NULL) | |
22516 | return 1; | |
22517 | ||
10b3939b DJ |
22518 | if (per_cu->cu->mark) |
22519 | return 1; | |
22520 | per_cu->cu->mark = 1; | |
22521 | ||
22522 | if (per_cu->cu->dependencies != NULL) | |
22523 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
22524 | ||
22525 | return 1; | |
22526 | } | |
22527 | ||
f504f079 DE |
22528 | /* Set the mark field in CU and in every other compilation unit in the |
22529 | cache that we must keep because we are keeping CU. */ | |
22530 | ||
ae038cb0 DJ |
22531 | static void |
22532 | dwarf2_mark (struct dwarf2_cu *cu) | |
22533 | { | |
22534 | if (cu->mark) | |
22535 | return; | |
22536 | cu->mark = 1; | |
10b3939b DJ |
22537 | if (cu->dependencies != NULL) |
22538 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
22539 | } |
22540 | ||
22541 | static void | |
22542 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
22543 | { | |
22544 | while (per_cu) | |
22545 | { | |
22546 | per_cu->cu->mark = 0; | |
22547 | per_cu = per_cu->cu->read_in_chain; | |
22548 | } | |
72bf9492 DJ |
22549 | } |
22550 | ||
72bf9492 DJ |
22551 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
22552 | is its offset in .debug_info for this objfile. */ | |
22553 | ||
22554 | static hashval_t | |
22555 | partial_die_hash (const void *item) | |
22556 | { | |
9a3c8263 SM |
22557 | const struct partial_die_info *part_die |
22558 | = (const struct partial_die_info *) item; | |
9a619af0 | 22559 | |
b64f50a1 | 22560 | return part_die->offset.sect_off; |
72bf9492 DJ |
22561 | } |
22562 | ||
22563 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
22564 | are equal if they have the same offset. */ | |
22565 | ||
22566 | static int | |
22567 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
22568 | { | |
9a3c8263 SM |
22569 | const struct partial_die_info *part_die_lhs |
22570 | = (const struct partial_die_info *) item_lhs; | |
22571 | const struct partial_die_info *part_die_rhs | |
22572 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 22573 | |
b64f50a1 | 22574 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
22575 | } |
22576 | ||
b4f54984 DE |
22577 | static struct cmd_list_element *set_dwarf_cmdlist; |
22578 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
22579 | |
22580 | static void | |
b4f54984 | 22581 | set_dwarf_cmd (char *args, int from_tty) |
ae038cb0 | 22582 | { |
b4f54984 | 22583 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 22584 | gdb_stdout); |
ae038cb0 DJ |
22585 | } |
22586 | ||
22587 | static void | |
b4f54984 | 22588 | show_dwarf_cmd (char *args, int from_tty) |
6e70227d | 22589 | { |
b4f54984 | 22590 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
22591 | } |
22592 | ||
4bf44c1c | 22593 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
22594 | |
22595 | static void | |
c1bd65d0 | 22596 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 22597 | { |
9a3c8263 | 22598 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 22599 | int ix; |
8b70b953 | 22600 | |
626f2d1c TT |
22601 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
22602 | cleaning up. */ | |
22603 | dwarf2_per_objfile = NULL; | |
22604 | ||
59b0c7c1 JB |
22605 | for (ix = 0; ix < data->n_comp_units; ++ix) |
22606 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 22607 | |
59b0c7c1 | 22608 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 22609 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
22610 | data->all_type_units[ix]->per_cu.imported_symtabs); |
22611 | xfree (data->all_type_units); | |
95554aad | 22612 | |
8b70b953 | 22613 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
22614 | |
22615 | if (data->dwo_files) | |
22616 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
22617 | if (data->dwp_file) |
22618 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
22619 | |
22620 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
22621 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
22622 | } |
22623 | ||
22624 | \f | |
ae2de4f8 | 22625 | /* The "save gdb-index" command. */ |
9291a0cd TT |
22626 | |
22627 | /* The contents of the hash table we create when building the string | |
22628 | table. */ | |
22629 | struct strtab_entry | |
22630 | { | |
22631 | offset_type offset; | |
22632 | const char *str; | |
22633 | }; | |
22634 | ||
559a7a62 JK |
22635 | /* Hash function for a strtab_entry. |
22636 | ||
22637 | Function is used only during write_hash_table so no index format backward | |
22638 | compatibility is needed. */ | |
b89be57b | 22639 | |
9291a0cd TT |
22640 | static hashval_t |
22641 | hash_strtab_entry (const void *e) | |
22642 | { | |
9a3c8263 | 22643 | const struct strtab_entry *entry = (const struct strtab_entry *) e; |
559a7a62 | 22644 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
22645 | } |
22646 | ||
22647 | /* Equality function for a strtab_entry. */ | |
b89be57b | 22648 | |
9291a0cd TT |
22649 | static int |
22650 | eq_strtab_entry (const void *a, const void *b) | |
22651 | { | |
9a3c8263 SM |
22652 | const struct strtab_entry *ea = (const struct strtab_entry *) a; |
22653 | const struct strtab_entry *eb = (const struct strtab_entry *) b; | |
9291a0cd TT |
22654 | return !strcmp (ea->str, eb->str); |
22655 | } | |
22656 | ||
22657 | /* Create a strtab_entry hash table. */ | |
b89be57b | 22658 | |
9291a0cd TT |
22659 | static htab_t |
22660 | create_strtab (void) | |
22661 | { | |
22662 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
22663 | xfree, xcalloc, xfree); | |
22664 | } | |
22665 | ||
22666 | /* Add a string to the constant pool. Return the string's offset in | |
22667 | host order. */ | |
b89be57b | 22668 | |
9291a0cd TT |
22669 | static offset_type |
22670 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
22671 | { | |
22672 | void **slot; | |
22673 | struct strtab_entry entry; | |
22674 | struct strtab_entry *result; | |
22675 | ||
22676 | entry.str = str; | |
22677 | slot = htab_find_slot (table, &entry, INSERT); | |
22678 | if (*slot) | |
9a3c8263 | 22679 | result = (struct strtab_entry *) *slot; |
9291a0cd TT |
22680 | else |
22681 | { | |
22682 | result = XNEW (struct strtab_entry); | |
22683 | result->offset = obstack_object_size (cpool); | |
22684 | result->str = str; | |
22685 | obstack_grow_str0 (cpool, str); | |
22686 | *slot = result; | |
22687 | } | |
22688 | return result->offset; | |
22689 | } | |
22690 | ||
22691 | /* An entry in the symbol table. */ | |
22692 | struct symtab_index_entry | |
22693 | { | |
22694 | /* The name of the symbol. */ | |
22695 | const char *name; | |
22696 | /* The offset of the name in the constant pool. */ | |
22697 | offset_type index_offset; | |
22698 | /* A sorted vector of the indices of all the CUs that hold an object | |
22699 | of this name. */ | |
22700 | VEC (offset_type) *cu_indices; | |
22701 | }; | |
22702 | ||
22703 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
22704 | struct mapped_symtab | |
22705 | { | |
22706 | offset_type n_elements; | |
22707 | offset_type size; | |
22708 | struct symtab_index_entry **data; | |
22709 | }; | |
22710 | ||
22711 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 22712 | |
9291a0cd TT |
22713 | static hashval_t |
22714 | hash_symtab_entry (const void *e) | |
22715 | { | |
9a3c8263 SM |
22716 | const struct symtab_index_entry *entry |
22717 | = (const struct symtab_index_entry *) e; | |
9291a0cd TT |
22718 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), |
22719 | sizeof (offset_type) * VEC_length (offset_type, | |
22720 | entry->cu_indices), | |
22721 | 0); | |
22722 | } | |
22723 | ||
22724 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 22725 | |
9291a0cd TT |
22726 | static int |
22727 | eq_symtab_entry (const void *a, const void *b) | |
22728 | { | |
9a3c8263 SM |
22729 | const struct symtab_index_entry *ea = (const struct symtab_index_entry *) a; |
22730 | const struct symtab_index_entry *eb = (const struct symtab_index_entry *) b; | |
9291a0cd TT |
22731 | int len = VEC_length (offset_type, ea->cu_indices); |
22732 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
22733 | return 0; | |
22734 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
22735 | VEC_address (offset_type, eb->cu_indices), | |
22736 | sizeof (offset_type) * len); | |
22737 | } | |
22738 | ||
22739 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 22740 | |
9291a0cd TT |
22741 | static void |
22742 | delete_symtab_entry (void *p) | |
22743 | { | |
9a3c8263 | 22744 | struct symtab_index_entry *entry = (struct symtab_index_entry *) p; |
9291a0cd TT |
22745 | VEC_free (offset_type, entry->cu_indices); |
22746 | xfree (entry); | |
22747 | } | |
22748 | ||
22749 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 22750 | |
9291a0cd | 22751 | static htab_t |
3876f04e | 22752 | create_symbol_hash_table (void) |
9291a0cd TT |
22753 | { |
22754 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
22755 | delete_symtab_entry, xcalloc, xfree); | |
22756 | } | |
22757 | ||
22758 | /* Create a new mapped symtab object. */ | |
b89be57b | 22759 | |
9291a0cd TT |
22760 | static struct mapped_symtab * |
22761 | create_mapped_symtab (void) | |
22762 | { | |
22763 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
22764 | symtab->n_elements = 0; | |
22765 | symtab->size = 1024; | |
22766 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22767 | return symtab; | |
22768 | } | |
22769 | ||
22770 | /* Destroy a mapped_symtab. */ | |
b89be57b | 22771 | |
9291a0cd TT |
22772 | static void |
22773 | cleanup_mapped_symtab (void *p) | |
22774 | { | |
9a3c8263 | 22775 | struct mapped_symtab *symtab = (struct mapped_symtab *) p; |
9291a0cd TT |
22776 | /* The contents of the array are freed when the other hash table is |
22777 | destroyed. */ | |
22778 | xfree (symtab->data); | |
22779 | xfree (symtab); | |
22780 | } | |
22781 | ||
22782 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
22783 | the slot. |
22784 | ||
22785 | Function is used only during write_hash_table so no index format backward | |
22786 | compatibility is needed. */ | |
b89be57b | 22787 | |
9291a0cd TT |
22788 | static struct symtab_index_entry ** |
22789 | find_slot (struct mapped_symtab *symtab, const char *name) | |
22790 | { | |
559a7a62 | 22791 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
22792 | |
22793 | index = hash & (symtab->size - 1); | |
22794 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
22795 | ||
22796 | for (;;) | |
22797 | { | |
22798 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
22799 | return &symtab->data[index]; | |
22800 | index = (index + step) & (symtab->size - 1); | |
22801 | } | |
22802 | } | |
22803 | ||
22804 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 22805 | |
9291a0cd TT |
22806 | static void |
22807 | hash_expand (struct mapped_symtab *symtab) | |
22808 | { | |
22809 | offset_type old_size = symtab->size; | |
22810 | offset_type i; | |
22811 | struct symtab_index_entry **old_entries = symtab->data; | |
22812 | ||
22813 | symtab->size *= 2; | |
22814 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22815 | ||
22816 | for (i = 0; i < old_size; ++i) | |
22817 | { | |
22818 | if (old_entries[i]) | |
22819 | { | |
22820 | struct symtab_index_entry **slot = find_slot (symtab, | |
22821 | old_entries[i]->name); | |
22822 | *slot = old_entries[i]; | |
22823 | } | |
22824 | } | |
22825 | ||
22826 | xfree (old_entries); | |
22827 | } | |
22828 | ||
156942c7 DE |
22829 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
22830 | CU_INDEX is the index of the CU in which the symbol appears. | |
22831 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 22832 | |
9291a0cd TT |
22833 | static void |
22834 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 22835 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
22836 | offset_type cu_index) |
22837 | { | |
22838 | struct symtab_index_entry **slot; | |
156942c7 | 22839 | offset_type cu_index_and_attrs; |
9291a0cd TT |
22840 | |
22841 | ++symtab->n_elements; | |
22842 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
22843 | hash_expand (symtab); | |
22844 | ||
22845 | slot = find_slot (symtab, name); | |
22846 | if (!*slot) | |
22847 | { | |
22848 | *slot = XNEW (struct symtab_index_entry); | |
22849 | (*slot)->name = name; | |
156942c7 | 22850 | /* index_offset is set later. */ |
9291a0cd TT |
22851 | (*slot)->cu_indices = NULL; |
22852 | } | |
156942c7 DE |
22853 | |
22854 | cu_index_and_attrs = 0; | |
22855 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
22856 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
22857 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
22858 | ||
22859 | /* We don't want to record an index value twice as we want to avoid the | |
22860 | duplication. | |
22861 | We process all global symbols and then all static symbols | |
22862 | (which would allow us to avoid the duplication by only having to check | |
22863 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
22864 | To keep things simple we don't worry about the duplication here and | |
22865 | sort and uniqufy the list after we've processed all symbols. */ | |
22866 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
22867 | } | |
22868 | ||
22869 | /* qsort helper routine for uniquify_cu_indices. */ | |
22870 | ||
22871 | static int | |
22872 | offset_type_compare (const void *ap, const void *bp) | |
22873 | { | |
22874 | offset_type a = *(offset_type *) ap; | |
22875 | offset_type b = *(offset_type *) bp; | |
22876 | ||
22877 | return (a > b) - (b > a); | |
22878 | } | |
22879 | ||
22880 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
22881 | ||
22882 | static void | |
22883 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
22884 | { | |
22885 | int i; | |
22886 | ||
22887 | for (i = 0; i < symtab->size; ++i) | |
22888 | { | |
22889 | struct symtab_index_entry *entry = symtab->data[i]; | |
22890 | ||
22891 | if (entry | |
22892 | && entry->cu_indices != NULL) | |
22893 | { | |
22894 | unsigned int next_to_insert, next_to_check; | |
22895 | offset_type last_value; | |
22896 | ||
22897 | qsort (VEC_address (offset_type, entry->cu_indices), | |
22898 | VEC_length (offset_type, entry->cu_indices), | |
22899 | sizeof (offset_type), offset_type_compare); | |
22900 | ||
22901 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
22902 | next_to_insert = 1; | |
22903 | for (next_to_check = 1; | |
22904 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
22905 | ++next_to_check) | |
22906 | { | |
22907 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
22908 | != last_value) | |
22909 | { | |
22910 | last_value = VEC_index (offset_type, entry->cu_indices, | |
22911 | next_to_check); | |
22912 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
22913 | last_value); | |
22914 | ++next_to_insert; | |
22915 | } | |
22916 | } | |
22917 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
22918 | } | |
22919 | } | |
9291a0cd TT |
22920 | } |
22921 | ||
22922 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 22923 | |
9291a0cd | 22924 | static offset_type |
3876f04e | 22925 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
22926 | struct symtab_index_entry *entry) |
22927 | { | |
22928 | void **slot; | |
22929 | ||
3876f04e | 22930 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
22931 | if (!*slot) |
22932 | { | |
22933 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
22934 | offset_type val = MAYBE_SWAP (len); | |
22935 | offset_type iter; | |
22936 | int i; | |
22937 | ||
22938 | *slot = entry; | |
22939 | entry->index_offset = obstack_object_size (cpool); | |
22940 | ||
22941 | obstack_grow (cpool, &val, sizeof (val)); | |
22942 | for (i = 0; | |
22943 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
22944 | ++i) | |
22945 | { | |
22946 | val = MAYBE_SWAP (iter); | |
22947 | obstack_grow (cpool, &val, sizeof (val)); | |
22948 | } | |
22949 | } | |
22950 | else | |
22951 | { | |
9a3c8263 SM |
22952 | struct symtab_index_entry *old_entry |
22953 | = (struct symtab_index_entry *) *slot; | |
9291a0cd TT |
22954 | entry->index_offset = old_entry->index_offset; |
22955 | entry = old_entry; | |
22956 | } | |
22957 | return entry->index_offset; | |
22958 | } | |
22959 | ||
22960 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
22961 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 22962 | |
9291a0cd TT |
22963 | static void |
22964 | write_hash_table (struct mapped_symtab *symtab, | |
22965 | struct obstack *output, struct obstack *cpool) | |
22966 | { | |
22967 | offset_type i; | |
3876f04e | 22968 | htab_t symbol_hash_table; |
9291a0cd TT |
22969 | htab_t str_table; |
22970 | ||
3876f04e | 22971 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 22972 | str_table = create_strtab (); |
3876f04e | 22973 | |
9291a0cd TT |
22974 | /* We add all the index vectors to the constant pool first, to |
22975 | ensure alignment is ok. */ | |
22976 | for (i = 0; i < symtab->size; ++i) | |
22977 | { | |
22978 | if (symtab->data[i]) | |
3876f04e | 22979 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
22980 | } |
22981 | ||
22982 | /* Now write out the hash table. */ | |
22983 | for (i = 0; i < symtab->size; ++i) | |
22984 | { | |
22985 | offset_type str_off, vec_off; | |
22986 | ||
22987 | if (symtab->data[i]) | |
22988 | { | |
22989 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
22990 | vec_off = symtab->data[i]->index_offset; | |
22991 | } | |
22992 | else | |
22993 | { | |
22994 | /* While 0 is a valid constant pool index, it is not valid | |
22995 | to have 0 for both offsets. */ | |
22996 | str_off = 0; | |
22997 | vec_off = 0; | |
22998 | } | |
22999 | ||
23000 | str_off = MAYBE_SWAP (str_off); | |
23001 | vec_off = MAYBE_SWAP (vec_off); | |
23002 | ||
23003 | obstack_grow (output, &str_off, sizeof (str_off)); | |
23004 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
23005 | } | |
23006 | ||
23007 | htab_delete (str_table); | |
3876f04e | 23008 | htab_delete (symbol_hash_table); |
9291a0cd TT |
23009 | } |
23010 | ||
0a5429f6 DE |
23011 | /* Struct to map psymtab to CU index in the index file. */ |
23012 | struct psymtab_cu_index_map | |
23013 | { | |
23014 | struct partial_symtab *psymtab; | |
23015 | unsigned int cu_index; | |
23016 | }; | |
23017 | ||
23018 | static hashval_t | |
23019 | hash_psymtab_cu_index (const void *item) | |
23020 | { | |
9a3c8263 SM |
23021 | const struct psymtab_cu_index_map *map |
23022 | = (const struct psymtab_cu_index_map *) item; | |
0a5429f6 DE |
23023 | |
23024 | return htab_hash_pointer (map->psymtab); | |
23025 | } | |
23026 | ||
23027 | static int | |
23028 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
23029 | { | |
9a3c8263 SM |
23030 | const struct psymtab_cu_index_map *lhs |
23031 | = (const struct psymtab_cu_index_map *) item_lhs; | |
23032 | const struct psymtab_cu_index_map *rhs | |
23033 | = (const struct psymtab_cu_index_map *) item_rhs; | |
0a5429f6 DE |
23034 | |
23035 | return lhs->psymtab == rhs->psymtab; | |
23036 | } | |
23037 | ||
23038 | /* Helper struct for building the address table. */ | |
23039 | struct addrmap_index_data | |
23040 | { | |
23041 | struct objfile *objfile; | |
23042 | struct obstack *addr_obstack; | |
23043 | htab_t cu_index_htab; | |
23044 | ||
23045 | /* Non-zero if the previous_* fields are valid. | |
23046 | We can't write an entry until we see the next entry (since it is only then | |
23047 | that we know the end of the entry). */ | |
23048 | int previous_valid; | |
23049 | /* Index of the CU in the table of all CUs in the index file. */ | |
23050 | unsigned int previous_cu_index; | |
0963b4bd | 23051 | /* Start address of the CU. */ |
0a5429f6 DE |
23052 | CORE_ADDR previous_cu_start; |
23053 | }; | |
23054 | ||
23055 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 23056 | |
9291a0cd | 23057 | static void |
0a5429f6 DE |
23058 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
23059 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 23060 | { |
0a5429f6 | 23061 | offset_type cu_index_to_write; |
948f8e3d | 23062 | gdb_byte addr[8]; |
9291a0cd TT |
23063 | CORE_ADDR baseaddr; |
23064 | ||
23065 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23066 | ||
0a5429f6 DE |
23067 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
23068 | obstack_grow (obstack, addr, 8); | |
23069 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
23070 | obstack_grow (obstack, addr, 8); | |
23071 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
23072 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
23073 | } | |
23074 | ||
23075 | /* Worker function for traversing an addrmap to build the address table. */ | |
23076 | ||
23077 | static int | |
23078 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
23079 | { | |
9a3c8263 SM |
23080 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
23081 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
23082 | |
23083 | if (data->previous_valid) | |
23084 | add_address_entry (data->objfile, data->addr_obstack, | |
23085 | data->previous_cu_start, start_addr, | |
23086 | data->previous_cu_index); | |
23087 | ||
23088 | data->previous_cu_start = start_addr; | |
23089 | if (pst != NULL) | |
23090 | { | |
23091 | struct psymtab_cu_index_map find_map, *map; | |
23092 | find_map.psymtab = pst; | |
9a3c8263 SM |
23093 | map = ((struct psymtab_cu_index_map *) |
23094 | htab_find (data->cu_index_htab, &find_map)); | |
0a5429f6 DE |
23095 | gdb_assert (map != NULL); |
23096 | data->previous_cu_index = map->cu_index; | |
23097 | data->previous_valid = 1; | |
23098 | } | |
23099 | else | |
23100 | data->previous_valid = 0; | |
23101 | ||
23102 | return 0; | |
23103 | } | |
23104 | ||
23105 | /* Write OBJFILE's address map to OBSTACK. | |
23106 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
23107 | in the index file. */ | |
23108 | ||
23109 | static void | |
23110 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
23111 | htab_t cu_index_htab) | |
23112 | { | |
23113 | struct addrmap_index_data addrmap_index_data; | |
23114 | ||
23115 | /* When writing the address table, we have to cope with the fact that | |
23116 | the addrmap iterator only provides the start of a region; we have to | |
23117 | wait until the next invocation to get the start of the next region. */ | |
23118 | ||
23119 | addrmap_index_data.objfile = objfile; | |
23120 | addrmap_index_data.addr_obstack = obstack; | |
23121 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
23122 | addrmap_index_data.previous_valid = 0; | |
23123 | ||
23124 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
23125 | &addrmap_index_data); | |
23126 | ||
23127 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
23128 | is valid, but we should still handle it. | |
23129 | The end address is recorded as the start of the next region, but that | |
23130 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
23131 | anyway. */ | |
23132 | if (addrmap_index_data.previous_valid) | |
23133 | add_address_entry (objfile, obstack, | |
23134 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
23135 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
23136 | } |
23137 | ||
156942c7 DE |
23138 | /* Return the symbol kind of PSYM. */ |
23139 | ||
23140 | static gdb_index_symbol_kind | |
23141 | symbol_kind (struct partial_symbol *psym) | |
23142 | { | |
23143 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
23144 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
23145 | ||
23146 | switch (domain) | |
23147 | { | |
23148 | case VAR_DOMAIN: | |
23149 | switch (aclass) | |
23150 | { | |
23151 | case LOC_BLOCK: | |
23152 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
23153 | case LOC_TYPEDEF: | |
23154 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23155 | case LOC_COMPUTED: | |
23156 | case LOC_CONST_BYTES: | |
23157 | case LOC_OPTIMIZED_OUT: | |
23158 | case LOC_STATIC: | |
23159 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23160 | case LOC_CONST: | |
23161 | /* Note: It's currently impossible to recognize psyms as enum values | |
23162 | short of reading the type info. For now punt. */ | |
23163 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23164 | default: | |
23165 | /* There are other LOC_FOO values that one might want to classify | |
23166 | as variables, but dwarf2read.c doesn't currently use them. */ | |
23167 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23168 | } | |
23169 | case STRUCT_DOMAIN: | |
23170 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23171 | default: | |
23172 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23173 | } | |
23174 | } | |
23175 | ||
9291a0cd | 23176 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 23177 | |
9291a0cd TT |
23178 | static void |
23179 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 23180 | htab_t psyms_seen, |
9291a0cd TT |
23181 | struct partial_symbol **psymp, |
23182 | int count, | |
987d643c TT |
23183 | offset_type cu_index, |
23184 | int is_static) | |
9291a0cd TT |
23185 | { |
23186 | for (; count-- > 0; ++psymp) | |
23187 | { | |
156942c7 DE |
23188 | struct partial_symbol *psym = *psymp; |
23189 | void **slot; | |
987d643c | 23190 | |
156942c7 | 23191 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 23192 | error (_("Ada is not currently supported by the index")); |
987d643c | 23193 | |
987d643c | 23194 | /* Only add a given psymbol once. */ |
156942c7 | 23195 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
23196 | if (!*slot) |
23197 | { | |
156942c7 DE |
23198 | gdb_index_symbol_kind kind = symbol_kind (psym); |
23199 | ||
23200 | *slot = psym; | |
23201 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
23202 | is_static, kind, cu_index); | |
987d643c | 23203 | } |
9291a0cd TT |
23204 | } |
23205 | } | |
23206 | ||
23207 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
23208 | exception if there is an error. */ | |
b89be57b | 23209 | |
9291a0cd TT |
23210 | static void |
23211 | write_obstack (FILE *file, struct obstack *obstack) | |
23212 | { | |
23213 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
23214 | file) | |
23215 | != obstack_object_size (obstack)) | |
23216 | error (_("couldn't data write to file")); | |
23217 | } | |
23218 | ||
23219 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 23220 | |
9291a0cd TT |
23221 | static void |
23222 | unlink_if_set (void *p) | |
23223 | { | |
9a3c8263 | 23224 | char **filename = (char **) p; |
9291a0cd TT |
23225 | if (*filename) |
23226 | unlink (*filename); | |
23227 | } | |
23228 | ||
1fd400ff TT |
23229 | /* A helper struct used when iterating over debug_types. */ |
23230 | struct signatured_type_index_data | |
23231 | { | |
23232 | struct objfile *objfile; | |
23233 | struct mapped_symtab *symtab; | |
23234 | struct obstack *types_list; | |
987d643c | 23235 | htab_t psyms_seen; |
1fd400ff TT |
23236 | int cu_index; |
23237 | }; | |
23238 | ||
23239 | /* A helper function that writes a single signatured_type to an | |
23240 | obstack. */ | |
b89be57b | 23241 | |
1fd400ff TT |
23242 | static int |
23243 | write_one_signatured_type (void **slot, void *d) | |
23244 | { | |
9a3c8263 SM |
23245 | struct signatured_type_index_data *info |
23246 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 23247 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 23248 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
23249 | gdb_byte val[8]; |
23250 | ||
23251 | write_psymbols (info->symtab, | |
987d643c | 23252 | info->psyms_seen, |
3e43a32a MS |
23253 | info->objfile->global_psymbols.list |
23254 | + psymtab->globals_offset, | |
987d643c TT |
23255 | psymtab->n_global_syms, info->cu_index, |
23256 | 0); | |
1fd400ff | 23257 | write_psymbols (info->symtab, |
987d643c | 23258 | info->psyms_seen, |
3e43a32a MS |
23259 | info->objfile->static_psymbols.list |
23260 | + psymtab->statics_offset, | |
987d643c TT |
23261 | psymtab->n_static_syms, info->cu_index, |
23262 | 1); | |
1fd400ff | 23263 | |
b64f50a1 JK |
23264 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23265 | entry->per_cu.offset.sect_off); | |
1fd400ff | 23266 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
23267 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23268 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
23269 | obstack_grow (info->types_list, val, 8); |
23270 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
23271 | obstack_grow (info->types_list, val, 8); | |
23272 | ||
23273 | ++info->cu_index; | |
23274 | ||
23275 | return 1; | |
23276 | } | |
23277 | ||
95554aad TT |
23278 | /* Recurse into all "included" dependencies and write their symbols as |
23279 | if they appeared in this psymtab. */ | |
23280 | ||
23281 | static void | |
23282 | recursively_write_psymbols (struct objfile *objfile, | |
23283 | struct partial_symtab *psymtab, | |
23284 | struct mapped_symtab *symtab, | |
23285 | htab_t psyms_seen, | |
23286 | offset_type cu_index) | |
23287 | { | |
23288 | int i; | |
23289 | ||
23290 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
23291 | if (psymtab->dependencies[i]->user != NULL) | |
23292 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
23293 | symtab, psyms_seen, cu_index); | |
23294 | ||
23295 | write_psymbols (symtab, | |
23296 | psyms_seen, | |
23297 | objfile->global_psymbols.list + psymtab->globals_offset, | |
23298 | psymtab->n_global_syms, cu_index, | |
23299 | 0); | |
23300 | write_psymbols (symtab, | |
23301 | psyms_seen, | |
23302 | objfile->static_psymbols.list + psymtab->statics_offset, | |
23303 | psymtab->n_static_syms, cu_index, | |
23304 | 1); | |
23305 | } | |
23306 | ||
9291a0cd | 23307 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 23308 | |
9291a0cd TT |
23309 | static void |
23310 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
23311 | { | |
23312 | struct cleanup *cleanup; | |
23313 | char *filename, *cleanup_filename; | |
1fd400ff TT |
23314 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
23315 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
23316 | int i; |
23317 | FILE *out_file; | |
23318 | struct mapped_symtab *symtab; | |
23319 | offset_type val, size_of_contents, total_len; | |
23320 | struct stat st; | |
987d643c | 23321 | htab_t psyms_seen; |
0a5429f6 DE |
23322 | htab_t cu_index_htab; |
23323 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 23324 | |
9291a0cd TT |
23325 | if (dwarf2_per_objfile->using_index) |
23326 | error (_("Cannot use an index to create the index")); | |
23327 | ||
8b70b953 TT |
23328 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
23329 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
23330 | ||
260b681b DE |
23331 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
23332 | return; | |
23333 | ||
4262abfb JK |
23334 | if (stat (objfile_name (objfile), &st) < 0) |
23335 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 23336 | |
4262abfb | 23337 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
23338 | INDEX_SUFFIX, (char *) NULL); |
23339 | cleanup = make_cleanup (xfree, filename); | |
23340 | ||
614c279d | 23341 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
23342 | if (!out_file) |
23343 | error (_("Can't open `%s' for writing"), filename); | |
23344 | ||
23345 | cleanup_filename = filename; | |
23346 | make_cleanup (unlink_if_set, &cleanup_filename); | |
23347 | ||
23348 | symtab = create_mapped_symtab (); | |
23349 | make_cleanup (cleanup_mapped_symtab, symtab); | |
23350 | ||
23351 | obstack_init (&addr_obstack); | |
23352 | make_cleanup_obstack_free (&addr_obstack); | |
23353 | ||
23354 | obstack_init (&cu_list); | |
23355 | make_cleanup_obstack_free (&cu_list); | |
23356 | ||
1fd400ff TT |
23357 | obstack_init (&types_cu_list); |
23358 | make_cleanup_obstack_free (&types_cu_list); | |
23359 | ||
987d643c TT |
23360 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
23361 | NULL, xcalloc, xfree); | |
96408a79 | 23362 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 23363 | |
0a5429f6 DE |
23364 | /* While we're scanning CU's create a table that maps a psymtab pointer |
23365 | (which is what addrmap records) to its index (which is what is recorded | |
23366 | in the index file). This will later be needed to write the address | |
23367 | table. */ | |
23368 | cu_index_htab = htab_create_alloc (100, | |
23369 | hash_psymtab_cu_index, | |
23370 | eq_psymtab_cu_index, | |
23371 | NULL, xcalloc, xfree); | |
96408a79 | 23372 | make_cleanup_htab_delete (cu_index_htab); |
8d749320 SM |
23373 | psymtab_cu_index_map = XNEWVEC (struct psymtab_cu_index_map, |
23374 | dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
23375 | make_cleanup (xfree, psymtab_cu_index_map); |
23376 | ||
23377 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
23378 | work here. Also, the debug_types entries do not appear in |
23379 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
23380 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
23381 | { | |
3e43a32a MS |
23382 | struct dwarf2_per_cu_data *per_cu |
23383 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 23384 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 23385 | gdb_byte val[8]; |
0a5429f6 DE |
23386 | struct psymtab_cu_index_map *map; |
23387 | void **slot; | |
9291a0cd | 23388 | |
92fac807 JK |
23389 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
23390 | It may be referenced from a local scope but in such case it does not | |
23391 | need to be present in .gdb_index. */ | |
23392 | if (psymtab == NULL) | |
23393 | continue; | |
23394 | ||
95554aad TT |
23395 | if (psymtab->user == NULL) |
23396 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 23397 | |
0a5429f6 DE |
23398 | map = &psymtab_cu_index_map[i]; |
23399 | map->psymtab = psymtab; | |
23400 | map->cu_index = i; | |
23401 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
23402 | gdb_assert (slot != NULL); | |
23403 | gdb_assert (*slot == NULL); | |
23404 | *slot = map; | |
9291a0cd | 23405 | |
b64f50a1 JK |
23406 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
23407 | per_cu->offset.sect_off); | |
9291a0cd | 23408 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 23409 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
23410 | obstack_grow (&cu_list, val, 8); |
23411 | } | |
23412 | ||
0a5429f6 DE |
23413 | /* Dump the address map. */ |
23414 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
23415 | ||
1fd400ff TT |
23416 | /* Write out the .debug_type entries, if any. */ |
23417 | if (dwarf2_per_objfile->signatured_types) | |
23418 | { | |
23419 | struct signatured_type_index_data sig_data; | |
23420 | ||
23421 | sig_data.objfile = objfile; | |
23422 | sig_data.symtab = symtab; | |
23423 | sig_data.types_list = &types_cu_list; | |
987d643c | 23424 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
23425 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
23426 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
23427 | write_one_signatured_type, &sig_data); | |
23428 | } | |
23429 | ||
156942c7 DE |
23430 | /* Now that we've processed all symbols we can shrink their cu_indices |
23431 | lists. */ | |
23432 | uniquify_cu_indices (symtab); | |
23433 | ||
9291a0cd TT |
23434 | obstack_init (&constant_pool); |
23435 | make_cleanup_obstack_free (&constant_pool); | |
23436 | obstack_init (&symtab_obstack); | |
23437 | make_cleanup_obstack_free (&symtab_obstack); | |
23438 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
23439 | ||
23440 | obstack_init (&contents); | |
23441 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 23442 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
23443 | total_len = size_of_contents; |
23444 | ||
23445 | /* The version number. */ | |
796a7ff8 | 23446 | val = MAYBE_SWAP (8); |
9291a0cd TT |
23447 | obstack_grow (&contents, &val, sizeof (val)); |
23448 | ||
23449 | /* The offset of the CU list from the start of the file. */ | |
23450 | val = MAYBE_SWAP (total_len); | |
23451 | obstack_grow (&contents, &val, sizeof (val)); | |
23452 | total_len += obstack_object_size (&cu_list); | |
23453 | ||
1fd400ff TT |
23454 | /* The offset of the types CU list from the start of the file. */ |
23455 | val = MAYBE_SWAP (total_len); | |
23456 | obstack_grow (&contents, &val, sizeof (val)); | |
23457 | total_len += obstack_object_size (&types_cu_list); | |
23458 | ||
9291a0cd TT |
23459 | /* The offset of the address table from the start of the file. */ |
23460 | val = MAYBE_SWAP (total_len); | |
23461 | obstack_grow (&contents, &val, sizeof (val)); | |
23462 | total_len += obstack_object_size (&addr_obstack); | |
23463 | ||
23464 | /* The offset of the symbol table from the start of the file. */ | |
23465 | val = MAYBE_SWAP (total_len); | |
23466 | obstack_grow (&contents, &val, sizeof (val)); | |
23467 | total_len += obstack_object_size (&symtab_obstack); | |
23468 | ||
23469 | /* The offset of the constant pool from the start of the file. */ | |
23470 | val = MAYBE_SWAP (total_len); | |
23471 | obstack_grow (&contents, &val, sizeof (val)); | |
23472 | total_len += obstack_object_size (&constant_pool); | |
23473 | ||
23474 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
23475 | ||
23476 | write_obstack (out_file, &contents); | |
23477 | write_obstack (out_file, &cu_list); | |
1fd400ff | 23478 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
23479 | write_obstack (out_file, &addr_obstack); |
23480 | write_obstack (out_file, &symtab_obstack); | |
23481 | write_obstack (out_file, &constant_pool); | |
23482 | ||
23483 | fclose (out_file); | |
23484 | ||
23485 | /* We want to keep the file, so we set cleanup_filename to NULL | |
23486 | here. See unlink_if_set. */ | |
23487 | cleanup_filename = NULL; | |
23488 | ||
23489 | do_cleanups (cleanup); | |
23490 | } | |
23491 | ||
90476074 TT |
23492 | /* Implementation of the `save gdb-index' command. |
23493 | ||
23494 | Note that the file format used by this command is documented in the | |
23495 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 23496 | |
9291a0cd TT |
23497 | static void |
23498 | save_gdb_index_command (char *arg, int from_tty) | |
23499 | { | |
23500 | struct objfile *objfile; | |
23501 | ||
23502 | if (!arg || !*arg) | |
96d19272 | 23503 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
23504 | |
23505 | ALL_OBJFILES (objfile) | |
23506 | { | |
23507 | struct stat st; | |
23508 | ||
23509 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 23510 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
23511 | continue; |
23512 | ||
9a3c8263 SM |
23513 | dwarf2_per_objfile |
23514 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
23515 | dwarf2_objfile_data_key); | |
9291a0cd TT |
23516 | if (dwarf2_per_objfile) |
23517 | { | |
9291a0cd | 23518 | |
492d29ea | 23519 | TRY |
9291a0cd TT |
23520 | { |
23521 | write_psymtabs_to_index (objfile, arg); | |
23522 | } | |
492d29ea PA |
23523 | CATCH (except, RETURN_MASK_ERROR) |
23524 | { | |
23525 | exception_fprintf (gdb_stderr, except, | |
23526 | _("Error while writing index for `%s': "), | |
23527 | objfile_name (objfile)); | |
23528 | } | |
23529 | END_CATCH | |
9291a0cd TT |
23530 | } |
23531 | } | |
dce234bc PP |
23532 | } |
23533 | ||
9291a0cd TT |
23534 | \f |
23535 | ||
b4f54984 | 23536 | int dwarf_always_disassemble; |
9eae7c52 TT |
23537 | |
23538 | static void | |
b4f54984 DE |
23539 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
23540 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 23541 | { |
3e43a32a MS |
23542 | fprintf_filtered (file, |
23543 | _("Whether to always disassemble " | |
23544 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
23545 | value); |
23546 | } | |
23547 | ||
900e11f9 JK |
23548 | static void |
23549 | show_check_physname (struct ui_file *file, int from_tty, | |
23550 | struct cmd_list_element *c, const char *value) | |
23551 | { | |
23552 | fprintf_filtered (file, | |
23553 | _("Whether to check \"physname\" is %s.\n"), | |
23554 | value); | |
23555 | } | |
23556 | ||
6502dd73 DJ |
23557 | void _initialize_dwarf2_read (void); |
23558 | ||
23559 | void | |
23560 | _initialize_dwarf2_read (void) | |
23561 | { | |
96d19272 JK |
23562 | struct cmd_list_element *c; |
23563 | ||
dce234bc | 23564 | dwarf2_objfile_data_key |
c1bd65d0 | 23565 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 23566 | |
b4f54984 DE |
23567 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
23568 | Set DWARF specific variables.\n\ | |
23569 | Configure DWARF variables such as the cache size"), | |
23570 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
23571 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
23572 | ||
b4f54984 DE |
23573 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
23574 | Show DWARF specific variables\n\ | |
23575 | Show DWARF variables such as the cache size"), | |
23576 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
23577 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
23578 | ||
23579 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
23580 | &dwarf_max_cache_age, _("\ |
23581 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
23582 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
23583 | A higher limit means that cached compilation units will be stored\n\ |
23584 | in memory longer, and more total memory will be used. Zero disables\n\ | |
23585 | caching, which can slow down startup."), | |
2c5b56ce | 23586 | NULL, |
b4f54984 DE |
23587 | show_dwarf_max_cache_age, |
23588 | &set_dwarf_cmdlist, | |
23589 | &show_dwarf_cmdlist); | |
d97bc12b | 23590 | |
9eae7c52 | 23591 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 23592 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
23593 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
23594 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
23595 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
23596 | syntax. When disabled, expressions will be printed in a more\n\ | |
23597 | conversational style, when possible."), | |
23598 | NULL, | |
b4f54984 DE |
23599 | show_dwarf_always_disassemble, |
23600 | &set_dwarf_cmdlist, | |
23601 | &show_dwarf_cmdlist); | |
23602 | ||
23603 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
23604 | Set debugging of the DWARF reader."), _("\ | |
23605 | Show debugging of the DWARF reader."), _("\ | |
23606 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
23607 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
23608 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
23609 | NULL, |
23610 | NULL, | |
23611 | &setdebuglist, &showdebuglist); | |
23612 | ||
b4f54984 DE |
23613 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
23614 | Set debugging of the DWARF DIE reader."), _("\ | |
23615 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
23616 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
23617 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
23618 | NULL, |
23619 | NULL, | |
23620 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23621 | |
27e0867f DE |
23622 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
23623 | Set debugging of the dwarf line reader."), _("\ | |
23624 | Show debugging of the dwarf line reader."), _("\ | |
23625 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
23626 | A value of 1 (one) provides basic information.\n\ | |
23627 | A value greater than 1 provides more verbose information."), | |
23628 | NULL, | |
23629 | NULL, | |
23630 | &setdebuglist, &showdebuglist); | |
23631 | ||
900e11f9 JK |
23632 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
23633 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
23634 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
23635 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
23636 | the demangler."), | |
23637 | NULL, show_check_physname, | |
23638 | &setdebuglist, &showdebuglist); | |
23639 | ||
e615022a DE |
23640 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
23641 | no_class, &use_deprecated_index_sections, _("\ | |
23642 | Set whether to use deprecated gdb_index sections."), _("\ | |
23643 | Show whether to use deprecated gdb_index sections."), _("\ | |
23644 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
23645 | Normally they are ignored either because of a missing feature or\n\ | |
23646 | performance issue.\n\ | |
23647 | Warning: This option must be enabled before gdb reads the file."), | |
23648 | NULL, | |
23649 | NULL, | |
23650 | &setlist, &showlist); | |
23651 | ||
96d19272 | 23652 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 23653 | _("\ |
fc1a9d6e | 23654 | Save a gdb-index file.\n\ |
11570e71 | 23655 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
23656 | &save_cmdlist); |
23657 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
23658 | |
23659 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23660 | &dwarf2_locexpr_funcs); | |
23661 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23662 | &dwarf2_loclist_funcs); | |
23663 | ||
23664 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23665 | &dwarf2_block_frame_base_locexpr_funcs); | |
23666 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23667 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 23668 | } |