Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
ecd75fc8 | 3 | Copyright (C) 1994-2014 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 KS |
55 | #include "typeprint.h" |
56 | #include "jv-lang.h" | |
ccefe4c4 | 57 | #include "psympriv.h" |
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" |
4c2df51b | 72 | |
c906108c | 73 | #include <fcntl.h> |
c906108c | 74 | #include <sys/types.h> |
d8151005 | 75 | |
34eaf542 TT |
76 | typedef struct symbol *symbolp; |
77 | DEF_VEC_P (symbolp); | |
78 | ||
73be47f5 DE |
79 | /* When == 1, print basic high level tracing messages. |
80 | When > 1, be more verbose. | |
45cfd468 | 81 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ |
73be47f5 | 82 | static unsigned int dwarf2_read_debug = 0; |
45cfd468 | 83 | |
d97bc12b | 84 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 85 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 86 | |
900e11f9 JK |
87 | /* When non-zero, cross-check physname against demangler. */ |
88 | static int check_physname = 0; | |
89 | ||
481860b3 | 90 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 91 | static int use_deprecated_index_sections = 0; |
481860b3 | 92 | |
6502dd73 DJ |
93 | static const struct objfile_data *dwarf2_objfile_data_key; |
94 | ||
f1e6e072 TT |
95 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
96 | ||
97 | static int dwarf2_locexpr_index; | |
98 | static int dwarf2_loclist_index; | |
99 | static int dwarf2_locexpr_block_index; | |
100 | static int dwarf2_loclist_block_index; | |
101 | ||
73869dc2 DE |
102 | /* A descriptor for dwarf sections. |
103 | ||
104 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
105 | scanned. BUFFER, READIN are filled in later when the section is read. | |
106 | If the section contained compressed data then SIZE is updated to record | |
107 | the uncompressed size of the section. | |
108 | ||
109 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
110 | creating the concept of virtual sections contained within a real section. | |
111 | In DWP V2 the sections of the input DWO files are concatenated together | |
112 | into one section, but section offsets are kept relative to the original | |
113 | input section. | |
114 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
115 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
116 | describe the virtual section. */ | |
117 | ||
dce234bc PP |
118 | struct dwarf2_section_info |
119 | { | |
73869dc2 DE |
120 | union |
121 | { | |
e5aa3347 | 122 | /* If this is a real section, the bfd section. */ |
73869dc2 DE |
123 | asection *asection; |
124 | /* If this is a virtual section, pointer to the containing ("real") | |
e5aa3347 | 125 | section. */ |
73869dc2 DE |
126 | struct dwarf2_section_info *containing_section; |
127 | } s; | |
19ac8c2e | 128 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 129 | const gdb_byte *buffer; |
73869dc2 | 130 | /* The size of the section, real or virtual. */ |
dce234bc | 131 | bfd_size_type size; |
73869dc2 DE |
132 | /* If this is a virtual section, the offset in the real section. |
133 | Only valid if is_virtual. */ | |
134 | bfd_size_type virtual_offset; | |
be391dca | 135 | /* True if we have tried to read this section. */ |
73869dc2 DE |
136 | char readin; |
137 | /* True if this is a virtual section, False otherwise. | |
138 | This specifies which of s.asection and s.containing_section to use. */ | |
139 | char is_virtual; | |
dce234bc PP |
140 | }; |
141 | ||
8b70b953 TT |
142 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
143 | DEF_VEC_O (dwarf2_section_info_def); | |
144 | ||
9291a0cd TT |
145 | /* All offsets in the index are of this type. It must be |
146 | architecture-independent. */ | |
147 | typedef uint32_t offset_type; | |
148 | ||
149 | DEF_VEC_I (offset_type); | |
150 | ||
156942c7 DE |
151 | /* Ensure only legit values are used. */ |
152 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
153 | do { \ | |
154 | gdb_assert ((unsigned int) (value) <= 1); \ | |
155 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
156 | } while (0) | |
157 | ||
158 | /* Ensure only legit values are used. */ | |
159 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
160 | do { \ | |
161 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
162 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
163 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
164 | } while (0) | |
165 | ||
166 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
167 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
168 | do { \ | |
169 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
170 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
171 | } while (0) | |
172 | ||
9291a0cd TT |
173 | /* A description of the mapped index. The file format is described in |
174 | a comment by the code that writes the index. */ | |
175 | struct mapped_index | |
176 | { | |
559a7a62 JK |
177 | /* Index data format version. */ |
178 | int version; | |
179 | ||
9291a0cd TT |
180 | /* The total length of the buffer. */ |
181 | off_t total_size; | |
b11b1f88 | 182 | |
9291a0cd TT |
183 | /* A pointer to the address table data. */ |
184 | const gdb_byte *address_table; | |
b11b1f88 | 185 | |
9291a0cd TT |
186 | /* Size of the address table data in bytes. */ |
187 | offset_type address_table_size; | |
b11b1f88 | 188 | |
3876f04e DE |
189 | /* The symbol table, implemented as a hash table. */ |
190 | const offset_type *symbol_table; | |
b11b1f88 | 191 | |
9291a0cd | 192 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 193 | offset_type symbol_table_slots; |
b11b1f88 | 194 | |
9291a0cd TT |
195 | /* A pointer to the constant pool. */ |
196 | const char *constant_pool; | |
197 | }; | |
198 | ||
95554aad TT |
199 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
200 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
201 | ||
9cdd5dbd DE |
202 | /* Collection of data recorded per objfile. |
203 | This hangs off of dwarf2_objfile_data_key. */ | |
204 | ||
6502dd73 DJ |
205 | struct dwarf2_per_objfile |
206 | { | |
dce234bc PP |
207 | struct dwarf2_section_info info; |
208 | struct dwarf2_section_info abbrev; | |
209 | struct dwarf2_section_info line; | |
dce234bc PP |
210 | struct dwarf2_section_info loc; |
211 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 212 | struct dwarf2_section_info macro; |
dce234bc PP |
213 | struct dwarf2_section_info str; |
214 | struct dwarf2_section_info ranges; | |
3019eac3 | 215 | struct dwarf2_section_info addr; |
dce234bc PP |
216 | struct dwarf2_section_info frame; |
217 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 218 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 219 | |
8b70b953 TT |
220 | VEC (dwarf2_section_info_def) *types; |
221 | ||
be391dca TT |
222 | /* Back link. */ |
223 | struct objfile *objfile; | |
224 | ||
d467dd73 | 225 | /* Table of all the compilation units. This is used to locate |
10b3939b | 226 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
227 | struct dwarf2_per_cu_data **all_comp_units; |
228 | ||
229 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
230 | int n_comp_units; | |
231 | ||
1fd400ff | 232 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 233 | int n_type_units; |
1fd400ff | 234 | |
6aa5f3a6 DE |
235 | /* The number of elements allocated in all_type_units. |
236 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ | |
237 | int n_allocated_type_units; | |
238 | ||
a2ce51a0 DE |
239 | /* The .debug_types-related CUs (TUs). |
240 | This is stored in malloc space because we may realloc it. */ | |
b4dd5633 | 241 | struct signatured_type **all_type_units; |
1fd400ff | 242 | |
f4dc4d17 DE |
243 | /* Table of struct type_unit_group objects. |
244 | The hash key is the DW_AT_stmt_list value. */ | |
245 | htab_t type_unit_groups; | |
72dca2f5 | 246 | |
348e048f DE |
247 | /* A table mapping .debug_types signatures to its signatured_type entry. |
248 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
249 | htab_t signatured_types; | |
250 | ||
f4dc4d17 DE |
251 | /* Type unit statistics, to see how well the scaling improvements |
252 | are doing. */ | |
253 | struct tu_stats | |
254 | { | |
255 | int nr_uniq_abbrev_tables; | |
256 | int nr_symtabs; | |
257 | int nr_symtab_sharers; | |
258 | int nr_stmt_less_type_units; | |
6aa5f3a6 | 259 | int nr_all_type_units_reallocs; |
f4dc4d17 DE |
260 | } tu_stats; |
261 | ||
262 | /* A chain of compilation units that are currently read in, so that | |
263 | they can be freed later. */ | |
264 | struct dwarf2_per_cu_data *read_in_chain; | |
265 | ||
3019eac3 DE |
266 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
267 | This is NULL if the table hasn't been allocated yet. */ | |
268 | htab_t dwo_files; | |
269 | ||
80626a55 DE |
270 | /* Non-zero if we've check for whether there is a DWP file. */ |
271 | int dwp_checked; | |
272 | ||
273 | /* The DWP file if there is one, or NULL. */ | |
274 | struct dwp_file *dwp_file; | |
275 | ||
36586728 TT |
276 | /* The shared '.dwz' file, if one exists. This is used when the |
277 | original data was compressed using 'dwz -m'. */ | |
278 | struct dwz_file *dwz_file; | |
279 | ||
72dca2f5 FR |
280 | /* A flag indicating wether this objfile has a section loaded at a |
281 | VMA of 0. */ | |
282 | int has_section_at_zero; | |
9291a0cd | 283 | |
ae2de4f8 DE |
284 | /* True if we are using the mapped index, |
285 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
286 | unsigned char using_index; |
287 | ||
ae2de4f8 | 288 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 289 | struct mapped_index *index_table; |
98bfdba5 | 290 | |
7b9f3c50 | 291 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
292 | TUs typically share line table entries with a CU, so we maintain a |
293 | separate table of all line table entries to support the sharing. | |
294 | Note that while there can be way more TUs than CUs, we've already | |
295 | sorted all the TUs into "type unit groups", grouped by their | |
296 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
297 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
298 | htab_t quick_file_names_table; |
299 | ||
98bfdba5 PA |
300 | /* Set during partial symbol reading, to prevent queueing of full |
301 | symbols. */ | |
302 | int reading_partial_symbols; | |
673bfd45 | 303 | |
dee91e82 | 304 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 305 | This is NULL if not allocated yet. |
02142a6c | 306 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 307 | htab_t die_type_hash; |
95554aad TT |
308 | |
309 | /* The CUs we recently read. */ | |
310 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
311 | }; |
312 | ||
313 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 314 | |
251d32d9 | 315 | /* Default names of the debugging sections. */ |
c906108c | 316 | |
233a11ab CS |
317 | /* Note that if the debugging section has been compressed, it might |
318 | have a name like .zdebug_info. */ | |
319 | ||
9cdd5dbd DE |
320 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
321 | { | |
251d32d9 TG |
322 | { ".debug_info", ".zdebug_info" }, |
323 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
324 | { ".debug_line", ".zdebug_line" }, | |
325 | { ".debug_loc", ".zdebug_loc" }, | |
326 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 327 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
328 | { ".debug_str", ".zdebug_str" }, |
329 | { ".debug_ranges", ".zdebug_ranges" }, | |
330 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 331 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
332 | { ".debug_frame", ".zdebug_frame" }, |
333 | { ".eh_frame", NULL }, | |
24d3216f TT |
334 | { ".gdb_index", ".zgdb_index" }, |
335 | 23 | |
251d32d9 | 336 | }; |
c906108c | 337 | |
80626a55 | 338 | /* List of DWO/DWP sections. */ |
3019eac3 | 339 | |
80626a55 | 340 | static const struct dwop_section_names |
3019eac3 DE |
341 | { |
342 | struct dwarf2_section_names abbrev_dwo; | |
343 | struct dwarf2_section_names info_dwo; | |
344 | struct dwarf2_section_names line_dwo; | |
345 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
346 | struct dwarf2_section_names macinfo_dwo; |
347 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
348 | struct dwarf2_section_names str_dwo; |
349 | struct dwarf2_section_names str_offsets_dwo; | |
350 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
351 | struct dwarf2_section_names cu_index; |
352 | struct dwarf2_section_names tu_index; | |
3019eac3 | 353 | } |
80626a55 | 354 | dwop_section_names = |
3019eac3 DE |
355 | { |
356 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
357 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
358 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
359 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
360 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
361 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
362 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
363 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
364 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
365 | { ".debug_cu_index", ".zdebug_cu_index" }, |
366 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
367 | }; |
368 | ||
c906108c SS |
369 | /* local data types */ |
370 | ||
107d2387 AC |
371 | /* The data in a compilation unit header, after target2host |
372 | translation, looks like this. */ | |
c906108c | 373 | struct comp_unit_head |
a738430d | 374 | { |
c764a876 | 375 | unsigned int length; |
a738430d | 376 | short version; |
a738430d MK |
377 | unsigned char addr_size; |
378 | unsigned char signed_addr_p; | |
b64f50a1 | 379 | sect_offset abbrev_offset; |
57349743 | 380 | |
a738430d MK |
381 | /* Size of file offsets; either 4 or 8. */ |
382 | unsigned int offset_size; | |
57349743 | 383 | |
a738430d MK |
384 | /* Size of the length field; either 4 or 12. */ |
385 | unsigned int initial_length_size; | |
57349743 | 386 | |
a738430d MK |
387 | /* Offset to the first byte of this compilation unit header in the |
388 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 389 | sect_offset offset; |
57349743 | 390 | |
d00adf39 DE |
391 | /* Offset to first die in this cu from the start of the cu. |
392 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 393 | cu_offset first_die_offset; |
a738430d | 394 | }; |
c906108c | 395 | |
3da10d80 KS |
396 | /* Type used for delaying computation of method physnames. |
397 | See comments for compute_delayed_physnames. */ | |
398 | struct delayed_method_info | |
399 | { | |
400 | /* The type to which the method is attached, i.e., its parent class. */ | |
401 | struct type *type; | |
402 | ||
403 | /* The index of the method in the type's function fieldlists. */ | |
404 | int fnfield_index; | |
405 | ||
406 | /* The index of the method in the fieldlist. */ | |
407 | int index; | |
408 | ||
409 | /* The name of the DIE. */ | |
410 | const char *name; | |
411 | ||
412 | /* The DIE associated with this method. */ | |
413 | struct die_info *die; | |
414 | }; | |
415 | ||
416 | typedef struct delayed_method_info delayed_method_info; | |
417 | DEF_VEC_O (delayed_method_info); | |
418 | ||
e7c27a73 DJ |
419 | /* Internal state when decoding a particular compilation unit. */ |
420 | struct dwarf2_cu | |
421 | { | |
422 | /* The objfile containing this compilation unit. */ | |
423 | struct objfile *objfile; | |
424 | ||
d00adf39 | 425 | /* The header of the compilation unit. */ |
e7c27a73 | 426 | struct comp_unit_head header; |
e142c38c | 427 | |
d00adf39 DE |
428 | /* Base address of this compilation unit. */ |
429 | CORE_ADDR base_address; | |
430 | ||
431 | /* Non-zero if base_address has been set. */ | |
432 | int base_known; | |
433 | ||
e142c38c DJ |
434 | /* The language we are debugging. */ |
435 | enum language language; | |
436 | const struct language_defn *language_defn; | |
437 | ||
b0f35d58 DL |
438 | const char *producer; |
439 | ||
e142c38c DJ |
440 | /* The generic symbol table building routines have separate lists for |
441 | file scope symbols and all all other scopes (local scopes). So | |
442 | we need to select the right one to pass to add_symbol_to_list(). | |
443 | We do it by keeping a pointer to the correct list in list_in_scope. | |
444 | ||
445 | FIXME: The original dwarf code just treated the file scope as the | |
446 | first local scope, and all other local scopes as nested local | |
447 | scopes, and worked fine. Check to see if we really need to | |
448 | distinguish these in buildsym.c. */ | |
449 | struct pending **list_in_scope; | |
450 | ||
433df2d4 DE |
451 | /* The abbrev table for this CU. |
452 | Normally this points to the abbrev table in the objfile. | |
453 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
454 | struct abbrev_table *abbrev_table; | |
72bf9492 | 455 | |
b64f50a1 JK |
456 | /* Hash table holding all the loaded partial DIEs |
457 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
458 | htab_t partial_dies; |
459 | ||
460 | /* Storage for things with the same lifetime as this read-in compilation | |
461 | unit, including partial DIEs. */ | |
462 | struct obstack comp_unit_obstack; | |
463 | ||
ae038cb0 DJ |
464 | /* When multiple dwarf2_cu structures are living in memory, this field |
465 | chains them all together, so that they can be released efficiently. | |
466 | We will probably also want a generation counter so that most-recently-used | |
467 | compilation units are cached... */ | |
468 | struct dwarf2_per_cu_data *read_in_chain; | |
469 | ||
69d751e3 | 470 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
471 | struct dwarf2_per_cu_data *per_cu; |
472 | ||
473 | /* How many compilation units ago was this CU last referenced? */ | |
474 | int last_used; | |
475 | ||
b64f50a1 JK |
476 | /* A hash table of DIE cu_offset for following references with |
477 | die_info->offset.sect_off as hash. */ | |
51545339 | 478 | htab_t die_hash; |
10b3939b DJ |
479 | |
480 | /* Full DIEs if read in. */ | |
481 | struct die_info *dies; | |
482 | ||
483 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
484 | units referenced by this one. Only set during full symbol processing; | |
485 | partial symbol tables do not have dependencies. */ | |
486 | htab_t dependencies; | |
487 | ||
cb1df416 DJ |
488 | /* Header data from the line table, during full symbol processing. */ |
489 | struct line_header *line_header; | |
490 | ||
3da10d80 KS |
491 | /* A list of methods which need to have physnames computed |
492 | after all type information has been read. */ | |
493 | VEC (delayed_method_info) *method_list; | |
494 | ||
96408a79 SA |
495 | /* To be copied to symtab->call_site_htab. */ |
496 | htab_t call_site_htab; | |
497 | ||
034e5797 DE |
498 | /* Non-NULL if this CU came from a DWO file. |
499 | There is an invariant here that is important to remember: | |
500 | Except for attributes copied from the top level DIE in the "main" | |
501 | (or "stub") file in preparation for reading the DWO file | |
502 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
503 | Either there isn't a DWO file (in which case this is NULL and the point | |
504 | is moot), or there is and either we're not going to read it (in which | |
505 | case this is NULL) or there is and we are reading it (in which case this | |
506 | is non-NULL). */ | |
3019eac3 DE |
507 | struct dwo_unit *dwo_unit; |
508 | ||
509 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
510 | (zero is a valid value though). | |
1dbab08b | 511 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
512 | ULONGEST addr_base; |
513 | ||
2e3cf129 DE |
514 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
515 | (zero is a valid value though). | |
1dbab08b | 516 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 517 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
518 | be used without needing to know whether DWO files are in use or not. |
519 | N.B. This does not apply to DW_AT_ranges appearing in | |
520 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
521 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
522 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
523 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
524 | ULONGEST ranges_base; |
525 | ||
ae038cb0 DJ |
526 | /* Mark used when releasing cached dies. */ |
527 | unsigned int mark : 1; | |
528 | ||
8be455d7 JK |
529 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
530 | This test is imperfect as there may exist optimized debug code not using | |
531 | any location list and still facing inlining issues if handled as | |
532 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 533 | unsigned int has_loclist : 1; |
ba919b58 | 534 | |
1b80a9fa JK |
535 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
536 | if all the producer_is_* fields are valid. This information is cached | |
537 | because profiling CU expansion showed excessive time spent in | |
538 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
539 | unsigned int checked_producer : 1; |
540 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 541 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 542 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
543 | |
544 | /* When set, the file that we're processing is known to have | |
545 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
546 | this information, but later versions do. */ | |
547 | ||
548 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
549 | }; |
550 | ||
10b3939b DJ |
551 | /* Persistent data held for a compilation unit, even when not |
552 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 553 | read_symtab_private field of the psymtab. */ |
10b3939b | 554 | |
ae038cb0 DJ |
555 | struct dwarf2_per_cu_data |
556 | { | |
36586728 | 557 | /* The start offset and length of this compilation unit. |
45452591 | 558 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
559 | initial_length_size. |
560 | If the DIE refers to a DWO file, this is always of the original die, | |
561 | not the DWO file. */ | |
b64f50a1 | 562 | sect_offset offset; |
36586728 | 563 | unsigned int length; |
ae038cb0 DJ |
564 | |
565 | /* Flag indicating this compilation unit will be read in before | |
566 | any of the current compilation units are processed. */ | |
c764a876 | 567 | unsigned int queued : 1; |
ae038cb0 | 568 | |
0d99eb77 DE |
569 | /* This flag will be set when reading partial DIEs if we need to load |
570 | absolutely all DIEs for this compilation unit, instead of just the ones | |
571 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
572 | hash table and don't find it. */ |
573 | unsigned int load_all_dies : 1; | |
574 | ||
0186c6a7 DE |
575 | /* Non-zero if this CU is from .debug_types. |
576 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
577 | this is non-zero. */ | |
3019eac3 DE |
578 | unsigned int is_debug_types : 1; |
579 | ||
36586728 TT |
580 | /* Non-zero if this CU is from the .dwz file. */ |
581 | unsigned int is_dwz : 1; | |
582 | ||
a2ce51a0 DE |
583 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
584 | This flag is only valid if is_debug_types is true. | |
585 | We can't read a CU directly from a DWO file: There are required | |
586 | attributes in the stub. */ | |
587 | unsigned int reading_dwo_directly : 1; | |
588 | ||
7ee85ab1 DE |
589 | /* Non-zero if the TU has been read. |
590 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
591 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
592 | fetching them from random other DWOs (due to comdat folding). | |
593 | If the TU has already been read, the optimization is unnecessary | |
594 | (and unwise - we don't want to change where gdb thinks the TU lives | |
595 | "midflight"). | |
596 | This flag is only valid if is_debug_types is true. */ | |
597 | unsigned int tu_read : 1; | |
598 | ||
3019eac3 DE |
599 | /* The section this CU/TU lives in. |
600 | If the DIE refers to a DWO file, this is always the original die, | |
601 | not the DWO file. */ | |
8a0459fd | 602 | struct dwarf2_section_info *section; |
348e048f | 603 | |
17ea53c3 JK |
604 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
605 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 606 | struct dwarf2_cu *cu; |
1c379e20 | 607 | |
9cdd5dbd DE |
608 | /* The corresponding objfile. |
609 | Normally we can get the objfile from dwarf2_per_objfile. | |
610 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
611 | struct objfile *objfile; |
612 | ||
fffbe6a8 YQ |
613 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
614 | is active. Otherwise, the 'psymtab' field is active. */ | |
9291a0cd TT |
615 | union |
616 | { | |
617 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 618 | or NULL for unread partial units. */ |
9291a0cd TT |
619 | struct partial_symtab *psymtab; |
620 | ||
621 | /* Data needed by the "quick" functions. */ | |
622 | struct dwarf2_per_cu_quick_data *quick; | |
623 | } v; | |
95554aad | 624 | |
796a7ff8 DE |
625 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
626 | while reading psymtabs, used to compute the psymtab dependencies, | |
627 | and then cleared. Then it is filled in again while reading full | |
628 | symbols, and only deleted when the objfile is destroyed. | |
629 | ||
630 | This is also used to work around a difference between the way gold | |
631 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
632 | is a gold bug. For symbols coming from TUs, gold records in the index | |
633 | the CU that includes the TU instead of the TU itself. This breaks | |
634 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
635 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
636 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
637 | we need to look in TU Z to find X. Fortunately, this is akin to | |
638 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
639 | .gdb_index version <=7 this also records the TUs that the CU referred | |
640 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
641 | indices so we only pay a price for gold generated indices. |
642 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 643 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
644 | }; |
645 | ||
348e048f DE |
646 | /* Entry in the signatured_types hash table. */ |
647 | ||
648 | struct signatured_type | |
649 | { | |
42e7ad6c | 650 | /* The "per_cu" object of this type. |
ac9ec31b | 651 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
652 | N.B.: This is the first member so that it's easy to convert pointers |
653 | between them. */ | |
654 | struct dwarf2_per_cu_data per_cu; | |
655 | ||
3019eac3 | 656 | /* The type's signature. */ |
348e048f DE |
657 | ULONGEST signature; |
658 | ||
3019eac3 | 659 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
660 | If this TU is a DWO stub and the definition lives in a DWO file |
661 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
662 | cu_offset type_offset_in_tu; |
663 | ||
664 | /* Offset in the section of the type's DIE. | |
665 | If the definition lives in a DWO file, this is the offset in the | |
666 | .debug_types.dwo section. | |
667 | The value is zero until the actual value is known. | |
668 | Zero is otherwise not a valid section offset. */ | |
669 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
670 | |
671 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
672 | can share them. This points to the containing symtab. */ | |
673 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
674 | |
675 | /* The type. | |
676 | The first time we encounter this type we fully read it in and install it | |
677 | in the symbol tables. Subsequent times we only need the type. */ | |
678 | struct type *type; | |
a2ce51a0 DE |
679 | |
680 | /* Containing DWO unit. | |
681 | This field is valid iff per_cu.reading_dwo_directly. */ | |
682 | struct dwo_unit *dwo_unit; | |
348e048f DE |
683 | }; |
684 | ||
0186c6a7 DE |
685 | typedef struct signatured_type *sig_type_ptr; |
686 | DEF_VEC_P (sig_type_ptr); | |
687 | ||
094b34ac DE |
688 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
689 | This includes type_unit_group and quick_file_names. */ | |
690 | ||
691 | struct stmt_list_hash | |
692 | { | |
693 | /* The DWO unit this table is from or NULL if there is none. */ | |
694 | struct dwo_unit *dwo_unit; | |
695 | ||
696 | /* Offset in .debug_line or .debug_line.dwo. */ | |
697 | sect_offset line_offset; | |
698 | }; | |
699 | ||
f4dc4d17 DE |
700 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
701 | an object of this type. */ | |
702 | ||
703 | struct type_unit_group | |
704 | { | |
0186c6a7 | 705 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
706 | To simplify things we create an artificial CU that "includes" all the |
707 | type units using this stmt_list so that the rest of the code still has | |
708 | a "per_cu" handle on the symtab. | |
709 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 710 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
711 | struct dwarf2_per_cu_data per_cu; |
712 | ||
0186c6a7 DE |
713 | /* The TUs that share this DW_AT_stmt_list entry. |
714 | This is added to while parsing type units to build partial symtabs, | |
715 | and is deleted afterwards and not used again. */ | |
716 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 DE |
717 | |
718 | /* The primary symtab. | |
094b34ac DE |
719 | Type units in a group needn't all be defined in the same source file, |
720 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
721 | struct symtab *primary_symtab; |
722 | ||
094b34ac DE |
723 | /* The data used to construct the hash key. */ |
724 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
725 | |
726 | /* The number of symtabs from the line header. | |
727 | The value here must match line_header.num_file_names. */ | |
728 | unsigned int num_symtabs; | |
729 | ||
730 | /* The symbol tables for this TU (obtained from the files listed in | |
731 | DW_AT_stmt_list). | |
732 | WARNING: The order of entries here must match the order of entries | |
733 | in the line header. After the first TU using this type_unit_group, the | |
734 | line header for the subsequent TUs is recreated from this. This is done | |
735 | because we need to use the same symtabs for each TU using the same | |
736 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
737 | there's no guarantee the line header doesn't have duplicate entries. */ | |
738 | struct symtab **symtabs; | |
739 | }; | |
740 | ||
73869dc2 | 741 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
742 | |
743 | struct dwo_sections | |
744 | { | |
745 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
746 | struct dwarf2_section_info line; |
747 | struct dwarf2_section_info loc; | |
09262596 DE |
748 | struct dwarf2_section_info macinfo; |
749 | struct dwarf2_section_info macro; | |
3019eac3 DE |
750 | struct dwarf2_section_info str; |
751 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
752 | /* In the case of a virtual DWO file, these two are unused. */ |
753 | struct dwarf2_section_info info; | |
3019eac3 DE |
754 | VEC (dwarf2_section_info_def) *types; |
755 | }; | |
756 | ||
c88ee1f0 | 757 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
758 | |
759 | struct dwo_unit | |
760 | { | |
761 | /* Backlink to the containing struct dwo_file. */ | |
762 | struct dwo_file *dwo_file; | |
763 | ||
764 | /* The "id" that distinguishes this CU/TU. | |
765 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
766 | Since signatures came first, we stick with it for consistency. */ | |
767 | ULONGEST signature; | |
768 | ||
769 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 770 | struct dwarf2_section_info *section; |
3019eac3 | 771 | |
19ac8c2e | 772 | /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */ |
3019eac3 DE |
773 | sect_offset offset; |
774 | unsigned int length; | |
775 | ||
776 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
777 | cu_offset type_offset_in_tu; | |
778 | }; | |
779 | ||
73869dc2 DE |
780 | /* include/dwarf2.h defines the DWP section codes. |
781 | It defines a max value but it doesn't define a min value, which we | |
782 | use for error checking, so provide one. */ | |
783 | ||
784 | enum dwp_v2_section_ids | |
785 | { | |
786 | DW_SECT_MIN = 1 | |
787 | }; | |
788 | ||
80626a55 | 789 | /* Data for one DWO file. |
57d63ce2 DE |
790 | |
791 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
792 | appears in a DWP file). DWP files don't really have DWO files per se - | |
793 | comdat folding of types "loses" the DWO file they came from, and from | |
794 | a high level view DWP files appear to contain a mass of random types. | |
795 | However, to maintain consistency with the non-DWP case we pretend DWP | |
796 | files contain virtual DWO files, and we assign each TU with one virtual | |
797 | DWO file (generally based on the line and abbrev section offsets - | |
798 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
799 | |
800 | struct dwo_file | |
801 | { | |
0ac5b59e | 802 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
803 | For virtual DWO files the name is constructed from the section offsets |
804 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
805 | from related CU+TUs. */ | |
0ac5b59e DE |
806 | const char *dwo_name; |
807 | ||
808 | /* The DW_AT_comp_dir attribute. */ | |
809 | const char *comp_dir; | |
3019eac3 | 810 | |
80626a55 DE |
811 | /* The bfd, when the file is open. Otherwise this is NULL. |
812 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
813 | bfd *dbfd; | |
3019eac3 | 814 | |
73869dc2 DE |
815 | /* The sections that make up this DWO file. |
816 | Remember that for virtual DWO files in DWP V2, these are virtual | |
817 | sections (for lack of a better name). */ | |
3019eac3 DE |
818 | struct dwo_sections sections; |
819 | ||
19c3d4c9 DE |
820 | /* The CU in the file. |
821 | We only support one because having more than one requires hacking the | |
822 | dwo_name of each to match, which is highly unlikely to happen. | |
823 | Doing this means all TUs can share comp_dir: We also assume that | |
824 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
825 | struct dwo_unit *cu; | |
3019eac3 DE |
826 | |
827 | /* Table of TUs in the file. | |
828 | Each element is a struct dwo_unit. */ | |
829 | htab_t tus; | |
830 | }; | |
831 | ||
80626a55 DE |
832 | /* These sections are what may appear in a DWP file. */ |
833 | ||
834 | struct dwp_sections | |
835 | { | |
73869dc2 | 836 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
837 | struct dwarf2_section_info str; |
838 | struct dwarf2_section_info cu_index; | |
839 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
840 | |
841 | /* These are only used by DWP version 2 files. | |
842 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
843 | sections are referenced by section number, and are not recorded here. | |
844 | In DWP version 2 there is at most one copy of all these sections, each | |
845 | section being (effectively) comprised of the concatenation of all of the | |
846 | individual sections that exist in the version 1 format. | |
847 | To keep the code simple we treat each of these concatenated pieces as a | |
848 | section itself (a virtual section?). */ | |
849 | struct dwarf2_section_info abbrev; | |
850 | struct dwarf2_section_info info; | |
851 | struct dwarf2_section_info line; | |
852 | struct dwarf2_section_info loc; | |
853 | struct dwarf2_section_info macinfo; | |
854 | struct dwarf2_section_info macro; | |
855 | struct dwarf2_section_info str_offsets; | |
856 | struct dwarf2_section_info types; | |
80626a55 DE |
857 | }; |
858 | ||
73869dc2 DE |
859 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
860 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 861 | |
73869dc2 | 862 | struct virtual_v1_dwo_sections |
80626a55 DE |
863 | { |
864 | struct dwarf2_section_info abbrev; | |
865 | struct dwarf2_section_info line; | |
866 | struct dwarf2_section_info loc; | |
867 | struct dwarf2_section_info macinfo; | |
868 | struct dwarf2_section_info macro; | |
869 | struct dwarf2_section_info str_offsets; | |
870 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 871 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
872 | struct dwarf2_section_info info_or_types; |
873 | }; | |
874 | ||
73869dc2 DE |
875 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
876 | In version 2, the sections of the DWO files are concatenated together | |
877 | and stored in one section of that name. Thus each ELF section contains | |
878 | several "virtual" sections. */ | |
879 | ||
880 | struct virtual_v2_dwo_sections | |
881 | { | |
882 | bfd_size_type abbrev_offset; | |
883 | bfd_size_type abbrev_size; | |
884 | ||
885 | bfd_size_type line_offset; | |
886 | bfd_size_type line_size; | |
887 | ||
888 | bfd_size_type loc_offset; | |
889 | bfd_size_type loc_size; | |
890 | ||
891 | bfd_size_type macinfo_offset; | |
892 | bfd_size_type macinfo_size; | |
893 | ||
894 | bfd_size_type macro_offset; | |
895 | bfd_size_type macro_size; | |
896 | ||
897 | bfd_size_type str_offsets_offset; | |
898 | bfd_size_type str_offsets_size; | |
899 | ||
900 | /* Each DWP hash table entry records one CU or one TU. | |
901 | That is recorded here, and copied to dwo_unit.section. */ | |
902 | bfd_size_type info_or_types_offset; | |
903 | bfd_size_type info_or_types_size; | |
904 | }; | |
905 | ||
80626a55 DE |
906 | /* Contents of DWP hash tables. */ |
907 | ||
908 | struct dwp_hash_table | |
909 | { | |
73869dc2 | 910 | uint32_t version, nr_columns; |
80626a55 | 911 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
912 | const gdb_byte *hash_table, *unit_table; |
913 | union | |
914 | { | |
915 | struct | |
916 | { | |
917 | const gdb_byte *indices; | |
918 | } v1; | |
919 | struct | |
920 | { | |
921 | /* This is indexed by column number and gives the id of the section | |
922 | in that column. */ | |
923 | #define MAX_NR_V2_DWO_SECTIONS \ | |
924 | (1 /* .debug_info or .debug_types */ \ | |
925 | + 1 /* .debug_abbrev */ \ | |
926 | + 1 /* .debug_line */ \ | |
927 | + 1 /* .debug_loc */ \ | |
928 | + 1 /* .debug_str_offsets */ \ | |
929 | + 1 /* .debug_macro or .debug_macinfo */) | |
930 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
931 | const gdb_byte *offsets; | |
932 | const gdb_byte *sizes; | |
933 | } v2; | |
934 | } section_pool; | |
80626a55 DE |
935 | }; |
936 | ||
937 | /* Data for one DWP file. */ | |
938 | ||
939 | struct dwp_file | |
940 | { | |
941 | /* Name of the file. */ | |
942 | const char *name; | |
943 | ||
73869dc2 DE |
944 | /* File format version. */ |
945 | int version; | |
946 | ||
93417882 | 947 | /* The bfd. */ |
80626a55 DE |
948 | bfd *dbfd; |
949 | ||
950 | /* Section info for this file. */ | |
951 | struct dwp_sections sections; | |
952 | ||
57d63ce2 | 953 | /* Table of CUs in the file. */ |
80626a55 DE |
954 | const struct dwp_hash_table *cus; |
955 | ||
956 | /* Table of TUs in the file. */ | |
957 | const struct dwp_hash_table *tus; | |
958 | ||
19ac8c2e DE |
959 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
960 | htab_t loaded_cus; | |
961 | htab_t loaded_tus; | |
80626a55 | 962 | |
73869dc2 DE |
963 | /* Table to map ELF section numbers to their sections. |
964 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
965 | unsigned int num_sections; |
966 | asection **elf_sections; | |
967 | }; | |
968 | ||
36586728 TT |
969 | /* This represents a '.dwz' file. */ |
970 | ||
971 | struct dwz_file | |
972 | { | |
973 | /* A dwz file can only contain a few sections. */ | |
974 | struct dwarf2_section_info abbrev; | |
975 | struct dwarf2_section_info info; | |
976 | struct dwarf2_section_info str; | |
977 | struct dwarf2_section_info line; | |
978 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 979 | struct dwarf2_section_info gdb_index; |
36586728 TT |
980 | |
981 | /* The dwz's BFD. */ | |
982 | bfd *dwz_bfd; | |
983 | }; | |
984 | ||
0963b4bd MS |
985 | /* Struct used to pass misc. parameters to read_die_and_children, et |
986 | al. which are used for both .debug_info and .debug_types dies. | |
987 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 988 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
989 | |
990 | struct die_reader_specs | |
991 | { | |
a32a8923 | 992 | /* The bfd of die_section. */ |
93311388 DE |
993 | bfd* abfd; |
994 | ||
995 | /* The CU of the DIE we are parsing. */ | |
996 | struct dwarf2_cu *cu; | |
997 | ||
80626a55 | 998 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
999 | struct dwo_file *dwo_file; |
1000 | ||
dee91e82 | 1001 | /* The section the die comes from. |
3019eac3 | 1002 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1003 | struct dwarf2_section_info *die_section; |
1004 | ||
1005 | /* die_section->buffer. */ | |
d521ce57 | 1006 | const gdb_byte *buffer; |
f664829e DE |
1007 | |
1008 | /* The end of the buffer. */ | |
1009 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1010 | |
1011 | /* The value of the DW_AT_comp_dir attribute. */ | |
1012 | const char *comp_dir; | |
93311388 DE |
1013 | }; |
1014 | ||
fd820528 | 1015 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1016 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1017 | const gdb_byte *info_ptr, |
dee91e82 DE |
1018 | struct die_info *comp_unit_die, |
1019 | int has_children, | |
1020 | void *data); | |
1021 | ||
debd256d JB |
1022 | /* The line number information for a compilation unit (found in the |
1023 | .debug_line section) begins with a "statement program header", | |
1024 | which contains the following information. */ | |
1025 | struct line_header | |
1026 | { | |
1027 | unsigned int total_length; | |
1028 | unsigned short version; | |
1029 | unsigned int header_length; | |
1030 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 1031 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
1032 | unsigned char default_is_stmt; |
1033 | int line_base; | |
1034 | unsigned char line_range; | |
1035 | unsigned char opcode_base; | |
1036 | ||
1037 | /* standard_opcode_lengths[i] is the number of operands for the | |
1038 | standard opcode whose value is i. This means that | |
1039 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1040 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
1041 | unsigned char *standard_opcode_lengths; | |
1042 | ||
1043 | /* The include_directories table. NOTE! These strings are not | |
1044 | allocated with xmalloc; instead, they are pointers into | |
1045 | debug_line_buffer. If you try to free them, `free' will get | |
1046 | indigestion. */ | |
1047 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 1048 | const char **include_dirs; |
debd256d JB |
1049 | |
1050 | /* The file_names table. NOTE! These strings are not allocated | |
1051 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
1052 | Don't try to free them directly. */ | |
1053 | unsigned int num_file_names, file_names_size; | |
1054 | struct file_entry | |
c906108c | 1055 | { |
d521ce57 | 1056 | const char *name; |
debd256d JB |
1057 | unsigned int dir_index; |
1058 | unsigned int mod_time; | |
1059 | unsigned int length; | |
aaa75496 | 1060 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 1061 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
1062 | } *file_names; |
1063 | ||
1064 | /* The start and end of the statement program following this | |
6502dd73 | 1065 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 1066 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 1067 | }; |
c906108c SS |
1068 | |
1069 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 1070 | need this much information. */ |
c906108c SS |
1071 | struct partial_die_info |
1072 | { | |
72bf9492 | 1073 | /* Offset of this DIE. */ |
b64f50a1 | 1074 | sect_offset offset; |
72bf9492 DJ |
1075 | |
1076 | /* DWARF-2 tag for this DIE. */ | |
1077 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1078 | ||
72bf9492 DJ |
1079 | /* Assorted flags describing the data found in this DIE. */ |
1080 | unsigned int has_children : 1; | |
1081 | unsigned int is_external : 1; | |
1082 | unsigned int is_declaration : 1; | |
1083 | unsigned int has_type : 1; | |
1084 | unsigned int has_specification : 1; | |
1085 | unsigned int has_pc_info : 1; | |
481860b3 | 1086 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
1087 | |
1088 | /* Flag set if the SCOPE field of this structure has been | |
1089 | computed. */ | |
1090 | unsigned int scope_set : 1; | |
1091 | ||
fa4028e9 JB |
1092 | /* Flag set if the DIE has a byte_size attribute. */ |
1093 | unsigned int has_byte_size : 1; | |
1094 | ||
98bfdba5 PA |
1095 | /* Flag set if any of the DIE's children are template arguments. */ |
1096 | unsigned int has_template_arguments : 1; | |
1097 | ||
abc72ce4 DE |
1098 | /* Flag set if fixup_partial_die has been called on this die. */ |
1099 | unsigned int fixup_called : 1; | |
1100 | ||
36586728 TT |
1101 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1102 | unsigned int is_dwz : 1; | |
1103 | ||
1104 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1105 | unsigned int spec_is_dwz : 1; | |
1106 | ||
72bf9492 | 1107 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1108 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1109 | const char *name; |
72bf9492 | 1110 | |
abc72ce4 DE |
1111 | /* The linkage name, if present. */ |
1112 | const char *linkage_name; | |
1113 | ||
72bf9492 DJ |
1114 | /* The scope to prepend to our children. This is generally |
1115 | allocated on the comp_unit_obstack, so will disappear | |
1116 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1117 | const char *scope; |
72bf9492 | 1118 | |
95554aad TT |
1119 | /* Some data associated with the partial DIE. The tag determines |
1120 | which field is live. */ | |
1121 | union | |
1122 | { | |
1123 | /* The location description associated with this DIE, if any. */ | |
1124 | struct dwarf_block *locdesc; | |
1125 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1126 | sect_offset offset; | |
1127 | } d; | |
72bf9492 DJ |
1128 | |
1129 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1130 | CORE_ADDR lowpc; |
1131 | CORE_ADDR highpc; | |
72bf9492 | 1132 | |
93311388 | 1133 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1134 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1135 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1136 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1137 | const gdb_byte *sibling; |
72bf9492 DJ |
1138 | |
1139 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1140 | DW_AT_specification (or DW_AT_abstract_origin or | |
1141 | DW_AT_extension). */ | |
b64f50a1 | 1142 | sect_offset spec_offset; |
72bf9492 DJ |
1143 | |
1144 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1145 | if any. */ | |
1146 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1147 | }; |
1148 | ||
0963b4bd | 1149 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1150 | struct abbrev_info |
1151 | { | |
1152 | unsigned int number; /* number identifying abbrev */ | |
1153 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1154 | unsigned short has_children; /* boolean */ |
1155 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1156 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1157 | struct abbrev_info *next; /* next in chain */ | |
1158 | }; | |
1159 | ||
1160 | struct attr_abbrev | |
1161 | { | |
9d25dd43 DE |
1162 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1163 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1164 | }; |
1165 | ||
433df2d4 DE |
1166 | /* Size of abbrev_table.abbrev_hash_table. */ |
1167 | #define ABBREV_HASH_SIZE 121 | |
1168 | ||
1169 | /* Top level data structure to contain an abbreviation table. */ | |
1170 | ||
1171 | struct abbrev_table | |
1172 | { | |
f4dc4d17 DE |
1173 | /* Where the abbrev table came from. |
1174 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1175 | sect_offset offset; |
1176 | ||
1177 | /* Storage for the abbrev table. */ | |
1178 | struct obstack abbrev_obstack; | |
1179 | ||
1180 | /* Hash table of abbrevs. | |
1181 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1182 | It could be statically allocated, but the previous code didn't so we | |
1183 | don't either. */ | |
1184 | struct abbrev_info **abbrevs; | |
1185 | }; | |
1186 | ||
0963b4bd | 1187 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1188 | struct attribute |
1189 | { | |
9d25dd43 | 1190 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1191 | ENUM_BITFIELD(dwarf_form) form : 15; |
1192 | ||
1193 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1194 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1195 | here for better struct attribute alignment. */ | |
1196 | unsigned int string_is_canonical : 1; | |
1197 | ||
b60c80d6 DJ |
1198 | union |
1199 | { | |
15d034d0 | 1200 | const char *str; |
b60c80d6 | 1201 | struct dwarf_block *blk; |
43bbcdc2 PH |
1202 | ULONGEST unsnd; |
1203 | LONGEST snd; | |
b60c80d6 | 1204 | CORE_ADDR addr; |
ac9ec31b | 1205 | ULONGEST signature; |
b60c80d6 DJ |
1206 | } |
1207 | u; | |
1208 | }; | |
1209 | ||
0963b4bd | 1210 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1211 | struct die_info |
1212 | { | |
76815b17 DE |
1213 | /* DWARF-2 tag for this DIE. */ |
1214 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1215 | ||
1216 | /* Number of attributes */ | |
98bfdba5 PA |
1217 | unsigned char num_attrs; |
1218 | ||
1219 | /* True if we're presently building the full type name for the | |
1220 | type derived from this DIE. */ | |
1221 | unsigned char building_fullname : 1; | |
76815b17 | 1222 | |
adde2bff DE |
1223 | /* True if this die is in process. PR 16581. */ |
1224 | unsigned char in_process : 1; | |
1225 | ||
76815b17 DE |
1226 | /* Abbrev number */ |
1227 | unsigned int abbrev; | |
1228 | ||
93311388 | 1229 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1230 | sect_offset offset; |
78ba4af6 JB |
1231 | |
1232 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1233 | points to this die's parent; CHILD points to the first child of | |
1234 | this node; and all the children of a given node are chained | |
4950bc1c | 1235 | together via their SIBLING fields. */ |
639d11d3 DC |
1236 | struct die_info *child; /* Its first child, if any. */ |
1237 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1238 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1239 | |
b60c80d6 DJ |
1240 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1241 | zero, but it's not common and zero-sized arrays are not | |
1242 | sufficiently portable C. */ | |
1243 | struct attribute attrs[1]; | |
c906108c SS |
1244 | }; |
1245 | ||
0963b4bd | 1246 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1247 | |
1248 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1249 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1250 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1251 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1252 | #define DW_SND(attr) ((attr)->u.snd) | |
1253 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1254 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1255 | |
0963b4bd | 1256 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1257 | struct dwarf_block |
1258 | { | |
56eb65bd | 1259 | size_t size; |
1d6edc3c JK |
1260 | |
1261 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1262 | const gdb_byte *data; |
c906108c SS |
1263 | }; |
1264 | ||
c906108c SS |
1265 | #ifndef ATTR_ALLOC_CHUNK |
1266 | #define ATTR_ALLOC_CHUNK 4 | |
1267 | #endif | |
1268 | ||
c906108c SS |
1269 | /* Allocate fields for structs, unions and enums in this size. */ |
1270 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1271 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1272 | #endif | |
1273 | ||
c906108c SS |
1274 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1275 | but this would require a corresponding change in unpack_field_as_long | |
1276 | and friends. */ | |
1277 | static int bits_per_byte = 8; | |
1278 | ||
1279 | /* The routines that read and process dies for a C struct or C++ class | |
1280 | pass lists of data member fields and lists of member function fields | |
1281 | in an instance of a field_info structure, as defined below. */ | |
1282 | struct field_info | |
c5aa993b | 1283 | { |
0963b4bd | 1284 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1285 | struct nextfield |
1286 | { | |
1287 | struct nextfield *next; | |
1288 | int accessibility; | |
1289 | int virtuality; | |
1290 | struct field field; | |
1291 | } | |
7d0ccb61 | 1292 | *fields, *baseclasses; |
c906108c | 1293 | |
7d0ccb61 | 1294 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1295 | int nfields; |
c906108c | 1296 | |
c5aa993b JM |
1297 | /* Number of baseclasses. */ |
1298 | int nbaseclasses; | |
c906108c | 1299 | |
c5aa993b JM |
1300 | /* Set if the accesibility of one of the fields is not public. */ |
1301 | int non_public_fields; | |
c906108c | 1302 | |
c5aa993b JM |
1303 | /* Member function fields array, entries are allocated in the order they |
1304 | are encountered in the object file. */ | |
1305 | struct nextfnfield | |
1306 | { | |
1307 | struct nextfnfield *next; | |
1308 | struct fn_field fnfield; | |
1309 | } | |
1310 | *fnfields; | |
c906108c | 1311 | |
c5aa993b JM |
1312 | /* Member function fieldlist array, contains name of possibly overloaded |
1313 | member function, number of overloaded member functions and a pointer | |
1314 | to the head of the member function field chain. */ | |
1315 | struct fnfieldlist | |
1316 | { | |
15d034d0 | 1317 | const char *name; |
c5aa993b JM |
1318 | int length; |
1319 | struct nextfnfield *head; | |
1320 | } | |
1321 | *fnfieldlists; | |
c906108c | 1322 | |
c5aa993b JM |
1323 | /* Number of entries in the fnfieldlists array. */ |
1324 | int nfnfields; | |
98751a41 JK |
1325 | |
1326 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1327 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1328 | struct typedef_field_list | |
1329 | { | |
1330 | struct typedef_field field; | |
1331 | struct typedef_field_list *next; | |
1332 | } | |
1333 | *typedef_field_list; | |
1334 | unsigned typedef_field_list_count; | |
c5aa993b | 1335 | }; |
c906108c | 1336 | |
10b3939b DJ |
1337 | /* One item on the queue of compilation units to read in full symbols |
1338 | for. */ | |
1339 | struct dwarf2_queue_item | |
1340 | { | |
1341 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1342 | enum language pretend_language; |
10b3939b DJ |
1343 | struct dwarf2_queue_item *next; |
1344 | }; | |
1345 | ||
1346 | /* The current queue. */ | |
1347 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1348 | ||
ae038cb0 DJ |
1349 | /* Loaded secondary compilation units are kept in memory until they |
1350 | have not been referenced for the processing of this many | |
1351 | compilation units. Set this to zero to disable caching. Cache | |
1352 | sizes of up to at least twenty will improve startup time for | |
1353 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1354 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1355 | static void |
1356 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1357 | struct cmd_list_element *c, const char *value) | |
1358 | { | |
3e43a32a MS |
1359 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1360 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1361 | value); |
1362 | } | |
4390d890 | 1363 | \f |
c906108c SS |
1364 | /* local function prototypes */ |
1365 | ||
a32a8923 DE |
1366 | static const char *get_section_name (const struct dwarf2_section_info *); |
1367 | ||
1368 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1369 | ||
4efb68b1 | 1370 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1371 | |
918dd910 JK |
1372 | static void dwarf2_find_base_address (struct die_info *die, |
1373 | struct dwarf2_cu *cu); | |
1374 | ||
0018ea6f DE |
1375 | static struct partial_symtab *create_partial_symtab |
1376 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1377 | ||
c67a9c90 | 1378 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1379 | |
72bf9492 DJ |
1380 | static void scan_partial_symbols (struct partial_die_info *, |
1381 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1382 | int, struct dwarf2_cu *); |
c906108c | 1383 | |
72bf9492 DJ |
1384 | static void add_partial_symbol (struct partial_die_info *, |
1385 | struct dwarf2_cu *); | |
63d06c5c | 1386 | |
72bf9492 DJ |
1387 | static void add_partial_namespace (struct partial_die_info *pdi, |
1388 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1389 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1390 | |
5d7cb8df | 1391 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1392 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1393 | struct dwarf2_cu *cu); |
1394 | ||
72bf9492 DJ |
1395 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1396 | struct dwarf2_cu *cu); | |
91c24f0a | 1397 | |
bc30ff58 JB |
1398 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1399 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1400 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1401 | |
257e7a09 YQ |
1402 | static void dwarf2_read_symtab (struct partial_symtab *, |
1403 | struct objfile *); | |
c906108c | 1404 | |
a14ed312 | 1405 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1406 | |
433df2d4 DE |
1407 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1408 | (const struct abbrev_table *, unsigned int); | |
1409 | ||
1410 | static struct abbrev_table *abbrev_table_read_table | |
1411 | (struct dwarf2_section_info *, sect_offset); | |
1412 | ||
1413 | static void abbrev_table_free (struct abbrev_table *); | |
1414 | ||
f4dc4d17 DE |
1415 | static void abbrev_table_free_cleanup (void *); |
1416 | ||
dee91e82 DE |
1417 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1418 | struct dwarf2_section_info *); | |
c906108c | 1419 | |
f3dd6933 | 1420 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1421 | |
d521ce57 | 1422 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1423 | |
dee91e82 | 1424 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1425 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1426 | |
d521ce57 TT |
1427 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1428 | struct partial_die_info *, | |
1429 | struct abbrev_info *, | |
1430 | unsigned int, | |
1431 | const gdb_byte *); | |
c906108c | 1432 | |
36586728 | 1433 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1434 | struct dwarf2_cu *); |
72bf9492 DJ |
1435 | |
1436 | static void fixup_partial_die (struct partial_die_info *, | |
1437 | struct dwarf2_cu *); | |
1438 | ||
d521ce57 TT |
1439 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1440 | struct attribute *, struct attr_abbrev *, | |
1441 | const gdb_byte *); | |
a8329558 | 1442 | |
a1855c1d | 1443 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1444 | |
a1855c1d | 1445 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1446 | |
a1855c1d | 1447 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1448 | |
a1855c1d | 1449 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1450 | |
a1855c1d | 1451 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1452 | |
d521ce57 | 1453 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1454 | unsigned int *); |
c906108c | 1455 | |
d521ce57 | 1456 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1457 | |
1458 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1459 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1460 | unsigned int *, unsigned int *); |
613e1657 | 1461 | |
d521ce57 TT |
1462 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1463 | const struct comp_unit_head *, | |
c764a876 DE |
1464 | unsigned int *); |
1465 | ||
d521ce57 | 1466 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1467 | |
f4dc4d17 DE |
1468 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1469 | sect_offset); | |
1470 | ||
d521ce57 | 1471 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1472 | |
d521ce57 | 1473 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1474 | |
d521ce57 TT |
1475 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1476 | const struct comp_unit_head *, | |
1477 | unsigned int *); | |
4bdf3d34 | 1478 | |
d521ce57 | 1479 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1480 | |
d521ce57 | 1481 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1482 | |
d521ce57 | 1483 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1484 | |
d521ce57 TT |
1485 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1486 | const gdb_byte *, | |
3019eac3 DE |
1487 | unsigned int *); |
1488 | ||
d521ce57 | 1489 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1490 | ULONGEST str_index); |
3019eac3 | 1491 | |
e142c38c | 1492 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1493 | |
e142c38c DJ |
1494 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1495 | struct dwarf2_cu *); | |
c906108c | 1496 | |
348e048f | 1497 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1498 | unsigned int); |
348e048f | 1499 | |
05cf31d1 JB |
1500 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1501 | struct dwarf2_cu *cu); | |
1502 | ||
e142c38c | 1503 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1504 | |
e142c38c | 1505 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1506 | struct dwarf2_cu **); |
63d06c5c | 1507 | |
debd256d JB |
1508 | static void free_line_header (struct line_header *lh); |
1509 | ||
3019eac3 DE |
1510 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1511 | struct dwarf2_cu *cu); | |
debd256d | 1512 | |
f3f5162e | 1513 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 YQ |
1514 | struct dwarf2_cu *, struct partial_symtab *, |
1515 | CORE_ADDR); | |
c906108c | 1516 | |
d521ce57 | 1517 | static void dwarf2_start_subfile (const char *, const char *, const char *); |
c906108c | 1518 | |
f4dc4d17 | 1519 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
15d034d0 | 1520 | const char *, const char *, CORE_ADDR); |
f4dc4d17 | 1521 | |
a14ed312 | 1522 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1523 | struct dwarf2_cu *); |
c906108c | 1524 | |
34eaf542 TT |
1525 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1526 | struct dwarf2_cu *, struct symbol *); | |
1527 | ||
ff39bb5e | 1528 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1529 | struct dwarf2_cu *); |
c906108c | 1530 | |
ff39bb5e | 1531 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1532 | struct type *type, |
1533 | const char *name, | |
1534 | struct obstack *obstack, | |
12df843f | 1535 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1536 | const gdb_byte **bytes, |
98bfdba5 | 1537 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1538 | |
e7c27a73 | 1539 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1540 | |
b4ba55a1 JB |
1541 | static int need_gnat_info (struct dwarf2_cu *); |
1542 | ||
3e43a32a MS |
1543 | static struct type *die_descriptive_type (struct die_info *, |
1544 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1545 | |
1546 | static void set_descriptive_type (struct type *, struct die_info *, | |
1547 | struct dwarf2_cu *); | |
1548 | ||
e7c27a73 DJ |
1549 | static struct type *die_containing_type (struct die_info *, |
1550 | struct dwarf2_cu *); | |
c906108c | 1551 | |
ff39bb5e | 1552 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1553 | struct dwarf2_cu *); |
c906108c | 1554 | |
f792889a | 1555 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1556 | |
673bfd45 DE |
1557 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1558 | ||
0d5cff50 | 1559 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1560 | |
6e70227d | 1561 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1562 | const char *suffix, int physname, |
1563 | struct dwarf2_cu *cu); | |
63d06c5c | 1564 | |
e7c27a73 | 1565 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1566 | |
348e048f DE |
1567 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1568 | ||
e7c27a73 | 1569 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1570 | |
e7c27a73 | 1571 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1572 | |
96408a79 SA |
1573 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1574 | ||
ff013f42 JK |
1575 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1576 | struct dwarf2_cu *, struct partial_symtab *); | |
1577 | ||
a14ed312 | 1578 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1579 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1580 | struct partial_symtab *); | |
c906108c | 1581 | |
fae299cd DC |
1582 | static void get_scope_pc_bounds (struct die_info *, |
1583 | CORE_ADDR *, CORE_ADDR *, | |
1584 | struct dwarf2_cu *); | |
1585 | ||
801e3a5b JB |
1586 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1587 | CORE_ADDR, struct dwarf2_cu *); | |
1588 | ||
a14ed312 | 1589 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1590 | struct dwarf2_cu *); |
c906108c | 1591 | |
a14ed312 | 1592 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1593 | struct type *, struct dwarf2_cu *); |
c906108c | 1594 | |
a14ed312 | 1595 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1596 | struct die_info *, struct type *, |
e7c27a73 | 1597 | struct dwarf2_cu *); |
c906108c | 1598 | |
a14ed312 | 1599 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1600 | struct type *, |
1601 | struct dwarf2_cu *); | |
c906108c | 1602 | |
134d01f1 | 1603 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1604 | |
e7c27a73 | 1605 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1606 | |
e7c27a73 | 1607 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1608 | |
5d7cb8df JK |
1609 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1610 | ||
27aa8d6a SW |
1611 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1612 | ||
74921315 KS |
1613 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1614 | ||
f55ee35c JK |
1615 | static struct type *read_module_type (struct die_info *die, |
1616 | struct dwarf2_cu *cu); | |
1617 | ||
38d518c9 | 1618 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1619 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1620 | |
134d01f1 | 1621 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1622 | |
e7c27a73 | 1623 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1624 | |
6e70227d | 1625 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1626 | struct dwarf2_cu *); |
1627 | ||
bf6af496 | 1628 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1629 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1630 | struct die_info *); |
639d11d3 | 1631 | |
dee91e82 | 1632 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1633 | const gdb_byte *info_ptr, |
1634 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1635 | struct die_info *parent); |
1636 | ||
d521ce57 TT |
1637 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1638 | struct die_info **, const gdb_byte *, | |
1639 | int *, int); | |
3019eac3 | 1640 | |
d521ce57 TT |
1641 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1642 | struct die_info **, const gdb_byte *, | |
1643 | int *); | |
93311388 | 1644 | |
e7c27a73 | 1645 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1646 | |
15d034d0 TT |
1647 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1648 | struct obstack *); | |
71c25dea | 1649 | |
15d034d0 | 1650 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1651 | |
15d034d0 | 1652 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1653 | struct die_info *die, |
1654 | struct dwarf2_cu *cu); | |
1655 | ||
ca69b9e6 DE |
1656 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1657 | struct dwarf2_cu *cu); | |
1658 | ||
e142c38c | 1659 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1660 | struct dwarf2_cu **); |
9219021c | 1661 | |
f39c6ffd | 1662 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1663 | |
f39c6ffd | 1664 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1665 | |
f39c6ffd | 1666 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1667 | |
a14ed312 | 1668 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1669 | |
f39c6ffd | 1670 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1671 | |
f9aca02d | 1672 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1673 | |
d97bc12b DE |
1674 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1675 | ||
1676 | static void dump_die_for_error (struct die_info *); | |
1677 | ||
1678 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1679 | struct die_info *); | |
c906108c | 1680 | |
d97bc12b | 1681 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1682 | |
51545339 | 1683 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1684 | struct dwarf2_cu *); |
c906108c | 1685 | |
ff39bb5e | 1686 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1687 | |
ff39bb5e | 1688 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1689 | |
348e048f | 1690 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1691 | const struct attribute *, |
348e048f DE |
1692 | struct dwarf2_cu **); |
1693 | ||
10b3939b | 1694 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1695 | const struct attribute *, |
f2f0e013 | 1696 | struct dwarf2_cu **); |
c906108c | 1697 | |
348e048f | 1698 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1699 | const struct attribute *, |
348e048f DE |
1700 | struct dwarf2_cu **); |
1701 | ||
ac9ec31b DE |
1702 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1703 | struct dwarf2_cu *); | |
1704 | ||
1705 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1706 | const struct attribute *, |
ac9ec31b DE |
1707 | struct dwarf2_cu *); |
1708 | ||
e5fe5e75 | 1709 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1710 | |
52dc124a | 1711 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1712 | |
c906108c SS |
1713 | /* memory allocation interface */ |
1714 | ||
7b5a2f43 | 1715 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1716 | |
b60c80d6 | 1717 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1718 | |
09262596 | 1719 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
15d034d0 | 1720 | const char *, int); |
2e276125 | 1721 | |
6e5a29e1 | 1722 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1723 | |
6e5a29e1 | 1724 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1725 | |
6e5a29e1 | 1726 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1727 | |
6e5a29e1 | 1728 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1729 | |
8cf6f0b1 TT |
1730 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1731 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1732 | const struct attribute *attr); |
8cf6f0b1 | 1733 | |
ff39bb5e | 1734 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1735 | struct symbol *sym, |
f1e6e072 TT |
1736 | struct dwarf2_cu *cu, |
1737 | int is_block); | |
4c2df51b | 1738 | |
d521ce57 TT |
1739 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1740 | const gdb_byte *info_ptr, | |
1741 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1742 | |
72bf9492 DJ |
1743 | static void free_stack_comp_unit (void *); |
1744 | ||
72bf9492 DJ |
1745 | static hashval_t partial_die_hash (const void *item); |
1746 | ||
1747 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1748 | ||
ae038cb0 | 1749 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1750 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1751 | |
9816fde3 | 1752 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1753 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1754 | |
1755 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1756 | struct die_info *comp_unit_die, |
1757 | enum language pretend_language); | |
93311388 | 1758 | |
68dc6402 | 1759 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1760 | |
1761 | static void free_cached_comp_units (void *); | |
1762 | ||
1763 | static void age_cached_comp_units (void); | |
1764 | ||
dee91e82 | 1765 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1766 | |
f792889a DJ |
1767 | static struct type *set_die_type (struct die_info *, struct type *, |
1768 | struct dwarf2_cu *); | |
1c379e20 | 1769 | |
ae038cb0 DJ |
1770 | static void create_all_comp_units (struct objfile *); |
1771 | ||
0e50663e | 1772 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1773 | |
95554aad TT |
1774 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1775 | enum language); | |
10b3939b | 1776 | |
95554aad TT |
1777 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1778 | enum language); | |
10b3939b | 1779 | |
f4dc4d17 DE |
1780 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1781 | enum language); | |
1782 | ||
10b3939b DJ |
1783 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1784 | struct dwarf2_per_cu_data *); | |
1785 | ||
ae038cb0 DJ |
1786 | static void dwarf2_mark (struct dwarf2_cu *); |
1787 | ||
1788 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1789 | ||
b64f50a1 | 1790 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1791 | struct dwarf2_per_cu_data *); |
673bfd45 | 1792 | |
f792889a | 1793 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1794 | |
9291a0cd TT |
1795 | static void dwarf2_release_queue (void *dummy); |
1796 | ||
95554aad TT |
1797 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1798 | enum language pretend_language); | |
1799 | ||
a0f42c21 | 1800 | static void process_queue (void); |
9291a0cd TT |
1801 | |
1802 | static void find_file_and_directory (struct die_info *die, | |
1803 | struct dwarf2_cu *cu, | |
15d034d0 | 1804 | const char **name, const char **comp_dir); |
9291a0cd TT |
1805 | |
1806 | static char *file_full_name (int file, struct line_header *lh, | |
1807 | const char *comp_dir); | |
1808 | ||
d521ce57 | 1809 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1810 | (struct comp_unit_head *header, |
1811 | struct dwarf2_section_info *section, | |
d521ce57 | 1812 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1813 | int is_debug_types_section); |
1814 | ||
fd820528 | 1815 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1816 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1817 | int use_existing_cu, int keep, | |
3019eac3 DE |
1818 | die_reader_func_ftype *die_reader_func, void *data); |
1819 | ||
dee91e82 DE |
1820 | static void init_cutu_and_read_dies_simple |
1821 | (struct dwarf2_per_cu_data *this_cu, | |
1822 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1823 | |
673bfd45 | 1824 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1825 | |
3019eac3 DE |
1826 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1827 | ||
57d63ce2 DE |
1828 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1829 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1830 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1831 | |
1832 | static struct dwp_file *get_dwp_file (void); | |
1833 | ||
3019eac3 | 1834 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1835 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1836 | |
1837 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1838 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1839 | |
89e63ee4 DE |
1840 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1841 | ||
3019eac3 DE |
1842 | static void free_dwo_file_cleanup (void *); |
1843 | ||
95554aad TT |
1844 | static void process_cu_includes (void); |
1845 | ||
1b80a9fa | 1846 | static void check_producer (struct dwarf2_cu *cu); |
4390d890 DE |
1847 | \f |
1848 | /* Various complaints about symbol reading that don't abort the process. */ | |
1849 | ||
1850 | static void | |
1851 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1852 | { | |
1853 | complaint (&symfile_complaints, | |
1854 | _("statement list doesn't fit in .debug_line section")); | |
1855 | } | |
1856 | ||
1857 | static void | |
1858 | dwarf2_debug_line_missing_file_complaint (void) | |
1859 | { | |
1860 | complaint (&symfile_complaints, | |
1861 | _(".debug_line section has line data without a file")); | |
1862 | } | |
1863 | ||
1864 | static void | |
1865 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1866 | { | |
1867 | complaint (&symfile_complaints, | |
1868 | _(".debug_line section has line " | |
1869 | "program sequence without an end")); | |
1870 | } | |
1871 | ||
1872 | static void | |
1873 | dwarf2_complex_location_expr_complaint (void) | |
1874 | { | |
1875 | complaint (&symfile_complaints, _("location expression too complex")); | |
1876 | } | |
1877 | ||
1878 | static void | |
1879 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1880 | int arg3) | |
1881 | { | |
1882 | complaint (&symfile_complaints, | |
1883 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1884 | arg1, arg2, arg3); | |
1885 | } | |
1886 | ||
1887 | static void | |
1888 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1889 | { | |
1890 | complaint (&symfile_complaints, | |
1891 | _("debug info runs off end of %s section" | |
1892 | " [in module %s]"), | |
a32a8923 DE |
1893 | get_section_name (section), |
1894 | get_section_file_name (section)); | |
4390d890 | 1895 | } |
1b80a9fa | 1896 | |
4390d890 DE |
1897 | static void |
1898 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1899 | { | |
1900 | complaint (&symfile_complaints, | |
1901 | _("macro debug info contains a " | |
1902 | "malformed macro definition:\n`%s'"), | |
1903 | arg1); | |
1904 | } | |
1905 | ||
1906 | static void | |
1907 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1908 | { | |
1909 | complaint (&symfile_complaints, | |
1910 | _("invalid attribute class or form for '%s' in '%s'"), | |
1911 | arg1, arg2); | |
1912 | } | |
1913 | \f | |
9291a0cd TT |
1914 | #if WORDS_BIGENDIAN |
1915 | ||
1916 | /* Convert VALUE between big- and little-endian. */ | |
1917 | static offset_type | |
1918 | byte_swap (offset_type value) | |
1919 | { | |
1920 | offset_type result; | |
1921 | ||
1922 | result = (value & 0xff) << 24; | |
1923 | result |= (value & 0xff00) << 8; | |
1924 | result |= (value & 0xff0000) >> 8; | |
1925 | result |= (value & 0xff000000) >> 24; | |
1926 | return result; | |
1927 | } | |
1928 | ||
1929 | #define MAYBE_SWAP(V) byte_swap (V) | |
1930 | ||
1931 | #else | |
1932 | #define MAYBE_SWAP(V) (V) | |
1933 | #endif /* WORDS_BIGENDIAN */ | |
1934 | ||
31aa7e4e JB |
1935 | /* Read the given attribute value as an address, taking the attribute's |
1936 | form into account. */ | |
1937 | ||
1938 | static CORE_ADDR | |
1939 | attr_value_as_address (struct attribute *attr) | |
1940 | { | |
1941 | CORE_ADDR addr; | |
1942 | ||
1943 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
1944 | { | |
1945 | /* Aside from a few clearly defined exceptions, attributes that | |
1946 | contain an address must always be in DW_FORM_addr form. | |
1947 | Unfortunately, some compilers happen to be violating this | |
1948 | requirement by encoding addresses using other forms, such | |
1949 | as DW_FORM_data4 for example. For those broken compilers, | |
1950 | we try to do our best, without any guarantee of success, | |
1951 | to interpret the address correctly. It would also be nice | |
1952 | to generate a complaint, but that would require us to maintain | |
1953 | a list of legitimate cases where a non-address form is allowed, | |
1954 | as well as update callers to pass in at least the CU's DWARF | |
1955 | version. This is more overhead than what we're willing to | |
1956 | expand for a pretty rare case. */ | |
1957 | addr = DW_UNSND (attr); | |
1958 | } | |
1959 | else | |
1960 | addr = DW_ADDR (attr); | |
1961 | ||
1962 | return addr; | |
1963 | } | |
1964 | ||
9291a0cd TT |
1965 | /* The suffix for an index file. */ |
1966 | #define INDEX_SUFFIX ".gdb-index" | |
1967 | ||
c906108c | 1968 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1969 | information and return true if we have enough to do something. |
1970 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1971 | ELF names are used. */ | |
c906108c SS |
1972 | |
1973 | int | |
251d32d9 TG |
1974 | dwarf2_has_info (struct objfile *objfile, |
1975 | const struct dwarf2_debug_sections *names) | |
c906108c | 1976 | { |
be391dca TT |
1977 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1978 | if (!dwarf2_per_objfile) | |
1979 | { | |
1980 | /* Initialize per-objfile state. */ | |
1981 | struct dwarf2_per_objfile *data | |
1982 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1983 | |
be391dca TT |
1984 | memset (data, 0, sizeof (*data)); |
1985 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1986 | dwarf2_per_objfile = data; | |
6502dd73 | 1987 | |
251d32d9 TG |
1988 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1989 | (void *) names); | |
be391dca TT |
1990 | dwarf2_per_objfile->objfile = objfile; |
1991 | } | |
73869dc2 DE |
1992 | return (!dwarf2_per_objfile->info.is_virtual |
1993 | && dwarf2_per_objfile->info.s.asection != NULL | |
1994 | && !dwarf2_per_objfile->abbrev.is_virtual | |
1995 | && dwarf2_per_objfile->abbrev.s.asection != NULL); | |
1996 | } | |
1997 | ||
1998 | /* Return the containing section of virtual section SECTION. */ | |
1999 | ||
2000 | static struct dwarf2_section_info * | |
2001 | get_containing_section (const struct dwarf2_section_info *section) | |
2002 | { | |
2003 | gdb_assert (section->is_virtual); | |
2004 | return section->s.containing_section; | |
c906108c SS |
2005 | } |
2006 | ||
a32a8923 DE |
2007 | /* Return the bfd owner of SECTION. */ |
2008 | ||
2009 | static struct bfd * | |
2010 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2011 | { | |
73869dc2 DE |
2012 | if (section->is_virtual) |
2013 | { | |
2014 | section = get_containing_section (section); | |
2015 | gdb_assert (!section->is_virtual); | |
2016 | } | |
2017 | return section->s.asection->owner; | |
a32a8923 DE |
2018 | } |
2019 | ||
2020 | /* Return the bfd section of SECTION. | |
2021 | Returns NULL if the section is not present. */ | |
2022 | ||
2023 | static asection * | |
2024 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2025 | { | |
73869dc2 DE |
2026 | if (section->is_virtual) |
2027 | { | |
2028 | section = get_containing_section (section); | |
2029 | gdb_assert (!section->is_virtual); | |
2030 | } | |
2031 | return section->s.asection; | |
a32a8923 DE |
2032 | } |
2033 | ||
2034 | /* Return the name of SECTION. */ | |
2035 | ||
2036 | static const char * | |
2037 | get_section_name (const struct dwarf2_section_info *section) | |
2038 | { | |
2039 | asection *sectp = get_section_bfd_section (section); | |
2040 | ||
2041 | gdb_assert (sectp != NULL); | |
2042 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2043 | } | |
2044 | ||
2045 | /* Return the name of the file SECTION is in. */ | |
2046 | ||
2047 | static const char * | |
2048 | get_section_file_name (const struct dwarf2_section_info *section) | |
2049 | { | |
2050 | bfd *abfd = get_section_bfd_owner (section); | |
2051 | ||
2052 | return bfd_get_filename (abfd); | |
2053 | } | |
2054 | ||
2055 | /* Return the id of SECTION. | |
2056 | Returns 0 if SECTION doesn't exist. */ | |
2057 | ||
2058 | static int | |
2059 | get_section_id (const struct dwarf2_section_info *section) | |
2060 | { | |
2061 | asection *sectp = get_section_bfd_section (section); | |
2062 | ||
2063 | if (sectp == NULL) | |
2064 | return 0; | |
2065 | return sectp->id; | |
2066 | } | |
2067 | ||
2068 | /* Return the flags of SECTION. | |
73869dc2 | 2069 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2070 | |
2071 | static int | |
2072 | get_section_flags (const struct dwarf2_section_info *section) | |
2073 | { | |
2074 | asection *sectp = get_section_bfd_section (section); | |
2075 | ||
2076 | gdb_assert (sectp != NULL); | |
2077 | return bfd_get_section_flags (sectp->owner, sectp); | |
2078 | } | |
2079 | ||
251d32d9 TG |
2080 | /* When loading sections, we look either for uncompressed section or for |
2081 | compressed section names. */ | |
233a11ab CS |
2082 | |
2083 | static int | |
251d32d9 TG |
2084 | section_is_p (const char *section_name, |
2085 | const struct dwarf2_section_names *names) | |
233a11ab | 2086 | { |
251d32d9 TG |
2087 | if (names->normal != NULL |
2088 | && strcmp (section_name, names->normal) == 0) | |
2089 | return 1; | |
2090 | if (names->compressed != NULL | |
2091 | && strcmp (section_name, names->compressed) == 0) | |
2092 | return 1; | |
2093 | return 0; | |
233a11ab CS |
2094 | } |
2095 | ||
c906108c SS |
2096 | /* This function is mapped across the sections and remembers the |
2097 | offset and size of each of the debugging sections we are interested | |
2098 | in. */ | |
2099 | ||
2100 | static void | |
251d32d9 | 2101 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 2102 | { |
251d32d9 | 2103 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 2104 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
2105 | |
2106 | if (vnames == NULL) | |
2107 | names = &dwarf2_elf_names; | |
2108 | else | |
2109 | names = (const struct dwarf2_debug_sections *) vnames; | |
2110 | ||
dc7650b8 JK |
2111 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2112 | { | |
2113 | } | |
2114 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 2115 | { |
73869dc2 | 2116 | dwarf2_per_objfile->info.s.asection = sectp; |
dce234bc | 2117 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); |
c906108c | 2118 | } |
251d32d9 | 2119 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 2120 | { |
73869dc2 | 2121 | dwarf2_per_objfile->abbrev.s.asection = sectp; |
dce234bc | 2122 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); |
c906108c | 2123 | } |
251d32d9 | 2124 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 2125 | { |
73869dc2 | 2126 | dwarf2_per_objfile->line.s.asection = sectp; |
dce234bc | 2127 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); |
c906108c | 2128 | } |
251d32d9 | 2129 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 2130 | { |
73869dc2 | 2131 | dwarf2_per_objfile->loc.s.asection = sectp; |
dce234bc | 2132 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); |
c906108c | 2133 | } |
251d32d9 | 2134 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 2135 | { |
73869dc2 | 2136 | dwarf2_per_objfile->macinfo.s.asection = sectp; |
dce234bc | 2137 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); |
c906108c | 2138 | } |
cf2c3c16 TT |
2139 | else if (section_is_p (sectp->name, &names->macro)) |
2140 | { | |
73869dc2 | 2141 | dwarf2_per_objfile->macro.s.asection = sectp; |
cf2c3c16 TT |
2142 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); |
2143 | } | |
251d32d9 | 2144 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 2145 | { |
73869dc2 | 2146 | dwarf2_per_objfile->str.s.asection = sectp; |
dce234bc | 2147 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); |
c906108c | 2148 | } |
3019eac3 DE |
2149 | else if (section_is_p (sectp->name, &names->addr)) |
2150 | { | |
73869dc2 | 2151 | dwarf2_per_objfile->addr.s.asection = sectp; |
3019eac3 DE |
2152 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); |
2153 | } | |
251d32d9 | 2154 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 2155 | { |
73869dc2 | 2156 | dwarf2_per_objfile->frame.s.asection = sectp; |
dce234bc | 2157 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2158 | } |
251d32d9 | 2159 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 2160 | { |
73869dc2 | 2161 | dwarf2_per_objfile->eh_frame.s.asection = sectp; |
dc7650b8 | 2162 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2163 | } |
251d32d9 | 2164 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2165 | { |
73869dc2 | 2166 | dwarf2_per_objfile->ranges.s.asection = sectp; |
dce234bc | 2167 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); |
af34e669 | 2168 | } |
251d32d9 | 2169 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2170 | { |
8b70b953 TT |
2171 | struct dwarf2_section_info type_section; |
2172 | ||
2173 | memset (&type_section, 0, sizeof (type_section)); | |
73869dc2 | 2174 | type_section.s.asection = sectp; |
8b70b953 TT |
2175 | type_section.size = bfd_get_section_size (sectp); |
2176 | ||
2177 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2178 | &type_section); | |
348e048f | 2179 | } |
251d32d9 | 2180 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd | 2181 | { |
73869dc2 | 2182 | dwarf2_per_objfile->gdb_index.s.asection = sectp; |
9291a0cd TT |
2183 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); |
2184 | } | |
dce234bc | 2185 | |
72dca2f5 FR |
2186 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
2187 | && bfd_section_vma (abfd, sectp) == 0) | |
2188 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2189 | } |
2190 | ||
fceca515 DE |
2191 | /* A helper function that decides whether a section is empty, |
2192 | or not present. */ | |
9e0ac564 TT |
2193 | |
2194 | static int | |
19ac8c2e | 2195 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2196 | { |
73869dc2 DE |
2197 | if (section->is_virtual) |
2198 | return section->size == 0; | |
2199 | return section->s.asection == NULL || section->size == 0; | |
9e0ac564 TT |
2200 | } |
2201 | ||
3019eac3 DE |
2202 | /* Read the contents of the section INFO. |
2203 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2204 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2205 | of the DWO file. | |
dce234bc | 2206 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2207 | |
dce234bc PP |
2208 | static void |
2209 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2210 | { |
a32a8923 | 2211 | asection *sectp; |
3019eac3 | 2212 | bfd *abfd; |
dce234bc | 2213 | gdb_byte *buf, *retbuf; |
c906108c | 2214 | |
be391dca TT |
2215 | if (info->readin) |
2216 | return; | |
dce234bc | 2217 | info->buffer = NULL; |
be391dca | 2218 | info->readin = 1; |
188dd5d6 | 2219 | |
9e0ac564 | 2220 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2221 | return; |
c906108c | 2222 | |
a32a8923 | 2223 | sectp = get_section_bfd_section (info); |
3019eac3 | 2224 | |
73869dc2 DE |
2225 | /* If this is a virtual section we need to read in the real one first. */ |
2226 | if (info->is_virtual) | |
2227 | { | |
2228 | struct dwarf2_section_info *containing_section = | |
2229 | get_containing_section (info); | |
2230 | ||
2231 | gdb_assert (sectp != NULL); | |
2232 | if ((sectp->flags & SEC_RELOC) != 0) | |
2233 | { | |
2234 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2235 | " supported in section %s [in module %s]"), | |
2236 | get_section_name (info), get_section_file_name (info)); | |
2237 | } | |
2238 | dwarf2_read_section (objfile, containing_section); | |
2239 | /* Other code should have already caught virtual sections that don't | |
2240 | fit. */ | |
2241 | gdb_assert (info->virtual_offset + info->size | |
2242 | <= containing_section->size); | |
2243 | /* If the real section is empty or there was a problem reading the | |
2244 | section we shouldn't get here. */ | |
2245 | gdb_assert (containing_section->buffer != NULL); | |
2246 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2247 | return; | |
2248 | } | |
2249 | ||
4bf44c1c TT |
2250 | /* If the section has relocations, we must read it ourselves. |
2251 | Otherwise we attach it to the BFD. */ | |
2252 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2253 | { |
d521ce57 | 2254 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2255 | return; |
dce234bc | 2256 | } |
dce234bc | 2257 | |
4bf44c1c TT |
2258 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
2259 | info->buffer = buf; | |
dce234bc PP |
2260 | |
2261 | /* When debugging .o files, we may need to apply relocations; see | |
2262 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2263 | We never compress sections in .o files, so we only need to | |
2264 | try this when the section is not compressed. */ | |
ac8035ab | 2265 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2266 | if (retbuf != NULL) |
2267 | { | |
2268 | info->buffer = retbuf; | |
2269 | return; | |
2270 | } | |
2271 | ||
a32a8923 DE |
2272 | abfd = get_section_bfd_owner (info); |
2273 | gdb_assert (abfd != NULL); | |
2274 | ||
dce234bc PP |
2275 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2276 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2277 | { |
2278 | error (_("Dwarf Error: Can't read DWARF data" | |
2279 | " in section %s [in module %s]"), | |
2280 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2281 | } | |
dce234bc PP |
2282 | } |
2283 | ||
9e0ac564 TT |
2284 | /* A helper function that returns the size of a section in a safe way. |
2285 | If you are positive that the section has been read before using the | |
2286 | size, then it is safe to refer to the dwarf2_section_info object's | |
2287 | "size" field directly. In other cases, you must call this | |
2288 | function, because for compressed sections the size field is not set | |
2289 | correctly until the section has been read. */ | |
2290 | ||
2291 | static bfd_size_type | |
2292 | dwarf2_section_size (struct objfile *objfile, | |
2293 | struct dwarf2_section_info *info) | |
2294 | { | |
2295 | if (!info->readin) | |
2296 | dwarf2_read_section (objfile, info); | |
2297 | return info->size; | |
2298 | } | |
2299 | ||
dce234bc | 2300 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2301 | SECTION_NAME. */ |
af34e669 | 2302 | |
dce234bc | 2303 | void |
3017a003 TG |
2304 | dwarf2_get_section_info (struct objfile *objfile, |
2305 | enum dwarf2_section_enum sect, | |
d521ce57 | 2306 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2307 | bfd_size_type *sizep) |
2308 | { | |
2309 | struct dwarf2_per_objfile *data | |
2310 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
2311 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
2312 | |
2313 | /* We may see an objfile without any DWARF, in which case we just | |
2314 | return nothing. */ | |
2315 | if (data == NULL) | |
2316 | { | |
2317 | *sectp = NULL; | |
2318 | *bufp = NULL; | |
2319 | *sizep = 0; | |
2320 | return; | |
2321 | } | |
3017a003 TG |
2322 | switch (sect) |
2323 | { | |
2324 | case DWARF2_DEBUG_FRAME: | |
2325 | info = &data->frame; | |
2326 | break; | |
2327 | case DWARF2_EH_FRAME: | |
2328 | info = &data->eh_frame; | |
2329 | break; | |
2330 | default: | |
2331 | gdb_assert_not_reached ("unexpected section"); | |
2332 | } | |
dce234bc | 2333 | |
9e0ac564 | 2334 | dwarf2_read_section (objfile, info); |
dce234bc | 2335 | |
a32a8923 | 2336 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2337 | *bufp = info->buffer; |
2338 | *sizep = info->size; | |
2339 | } | |
2340 | ||
36586728 TT |
2341 | /* A helper function to find the sections for a .dwz file. */ |
2342 | ||
2343 | static void | |
2344 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2345 | { | |
2346 | struct dwz_file *dwz_file = arg; | |
2347 | ||
2348 | /* Note that we only support the standard ELF names, because .dwz | |
2349 | is ELF-only (at the time of writing). */ | |
2350 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2351 | { | |
73869dc2 | 2352 | dwz_file->abbrev.s.asection = sectp; |
36586728 TT |
2353 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2354 | } | |
2355 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2356 | { | |
73869dc2 | 2357 | dwz_file->info.s.asection = sectp; |
36586728 TT |
2358 | dwz_file->info.size = bfd_get_section_size (sectp); |
2359 | } | |
2360 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2361 | { | |
73869dc2 | 2362 | dwz_file->str.s.asection = sectp; |
36586728 TT |
2363 | dwz_file->str.size = bfd_get_section_size (sectp); |
2364 | } | |
2365 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2366 | { | |
73869dc2 | 2367 | dwz_file->line.s.asection = sectp; |
36586728 TT |
2368 | dwz_file->line.size = bfd_get_section_size (sectp); |
2369 | } | |
2370 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2371 | { | |
73869dc2 | 2372 | dwz_file->macro.s.asection = sectp; |
36586728 TT |
2373 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2374 | } | |
2ec9a5e0 TT |
2375 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2376 | { | |
73869dc2 | 2377 | dwz_file->gdb_index.s.asection = sectp; |
2ec9a5e0 TT |
2378 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2379 | } | |
36586728 TT |
2380 | } |
2381 | ||
4db1a1dc TT |
2382 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2383 | there is no .gnu_debugaltlink section in the file. Error if there | |
2384 | is such a section but the file cannot be found. */ | |
36586728 TT |
2385 | |
2386 | static struct dwz_file * | |
2387 | dwarf2_get_dwz_file (void) | |
2388 | { | |
4db1a1dc TT |
2389 | bfd *dwz_bfd; |
2390 | char *data; | |
36586728 TT |
2391 | struct cleanup *cleanup; |
2392 | const char *filename; | |
2393 | struct dwz_file *result; | |
acd13123 | 2394 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2395 | size_t buildid_len; |
2396 | bfd_byte *buildid; | |
36586728 TT |
2397 | |
2398 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2399 | return dwarf2_per_objfile->dwz_file; | |
2400 | ||
4db1a1dc TT |
2401 | bfd_set_error (bfd_error_no_error); |
2402 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2403 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2404 | if (data == NULL) |
2405 | { | |
2406 | if (bfd_get_error () == bfd_error_no_error) | |
2407 | return NULL; | |
2408 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2409 | bfd_errmsg (bfd_get_error ())); | |
2410 | } | |
36586728 | 2411 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2412 | make_cleanup (xfree, buildid); |
36586728 | 2413 | |
acd13123 TT |
2414 | buildid_len = (size_t) buildid_len_arg; |
2415 | ||
f9d83a0b | 2416 | filename = (const char *) data; |
36586728 TT |
2417 | if (!IS_ABSOLUTE_PATH (filename)) |
2418 | { | |
4262abfb | 2419 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2420 | char *rel; |
2421 | ||
2422 | make_cleanup (xfree, abs); | |
2423 | abs = ldirname (abs); | |
2424 | make_cleanup (xfree, abs); | |
2425 | ||
2426 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2427 | make_cleanup (xfree, rel); | |
2428 | filename = rel; | |
2429 | } | |
2430 | ||
dc294be5 TT |
2431 | /* First try the file name given in the section. If that doesn't |
2432 | work, try to use the build-id instead. */ | |
36586728 | 2433 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); |
dc294be5 | 2434 | if (dwz_bfd != NULL) |
36586728 | 2435 | { |
dc294be5 TT |
2436 | if (!build_id_verify (dwz_bfd, buildid_len, buildid)) |
2437 | { | |
2438 | gdb_bfd_unref (dwz_bfd); | |
2439 | dwz_bfd = NULL; | |
2440 | } | |
36586728 TT |
2441 | } |
2442 | ||
dc294be5 TT |
2443 | if (dwz_bfd == NULL) |
2444 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2445 | ||
2446 | if (dwz_bfd == NULL) | |
2447 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2448 | objfile_name (dwarf2_per_objfile->objfile)); | |
2449 | ||
36586728 TT |
2450 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2451 | struct dwz_file); | |
2452 | result->dwz_bfd = dwz_bfd; | |
2453 | ||
2454 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2455 | ||
2456 | do_cleanups (cleanup); | |
2457 | ||
13aaf454 | 2458 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd); |
8d2cc612 | 2459 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2460 | return result; |
2461 | } | |
9291a0cd | 2462 | \f |
7b9f3c50 DE |
2463 | /* DWARF quick_symbols_functions support. */ |
2464 | ||
2465 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2466 | unique line tables, so we maintain a separate table of all .debug_line | |
2467 | derived entries to support the sharing. | |
2468 | All the quick functions need is the list of file names. We discard the | |
2469 | line_header when we're done and don't need to record it here. */ | |
2470 | struct quick_file_names | |
2471 | { | |
094b34ac DE |
2472 | /* The data used to construct the hash key. */ |
2473 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2474 | |
2475 | /* The number of entries in file_names, real_names. */ | |
2476 | unsigned int num_file_names; | |
2477 | ||
2478 | /* The file names from the line table, after being run through | |
2479 | file_full_name. */ | |
2480 | const char **file_names; | |
2481 | ||
2482 | /* The file names from the line table after being run through | |
2483 | gdb_realpath. These are computed lazily. */ | |
2484 | const char **real_names; | |
2485 | }; | |
2486 | ||
2487 | /* When using the index (and thus not using psymtabs), each CU has an | |
2488 | object of this type. This is used to hold information needed by | |
2489 | the various "quick" methods. */ | |
2490 | struct dwarf2_per_cu_quick_data | |
2491 | { | |
2492 | /* The file table. This can be NULL if there was no file table | |
2493 | or it's currently not read in. | |
2494 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2495 | struct quick_file_names *file_names; | |
2496 | ||
2497 | /* The corresponding symbol table. This is NULL if symbols for this | |
2498 | CU have not yet been read. */ | |
2499 | struct symtab *symtab; | |
2500 | ||
2501 | /* A temporary mark bit used when iterating over all CUs in | |
2502 | expand_symtabs_matching. */ | |
2503 | unsigned int mark : 1; | |
2504 | ||
2505 | /* True if we've tried to read the file table and found there isn't one. | |
2506 | There will be no point in trying to read it again next time. */ | |
2507 | unsigned int no_file_data : 1; | |
2508 | }; | |
2509 | ||
094b34ac DE |
2510 | /* Utility hash function for a stmt_list_hash. */ |
2511 | ||
2512 | static hashval_t | |
2513 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2514 | { | |
2515 | hashval_t v = 0; | |
2516 | ||
2517 | if (stmt_list_hash->dwo_unit != NULL) | |
2518 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2519 | v += stmt_list_hash->line_offset.sect_off; | |
2520 | return v; | |
2521 | } | |
2522 | ||
2523 | /* Utility equality function for a stmt_list_hash. */ | |
2524 | ||
2525 | static int | |
2526 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2527 | const struct stmt_list_hash *rhs) | |
2528 | { | |
2529 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2530 | return 0; | |
2531 | if (lhs->dwo_unit != NULL | |
2532 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2533 | return 0; | |
2534 | ||
2535 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2536 | } | |
2537 | ||
7b9f3c50 DE |
2538 | /* Hash function for a quick_file_names. */ |
2539 | ||
2540 | static hashval_t | |
2541 | hash_file_name_entry (const void *e) | |
2542 | { | |
2543 | const struct quick_file_names *file_data = e; | |
2544 | ||
094b34ac | 2545 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2546 | } |
2547 | ||
2548 | /* Equality function for a quick_file_names. */ | |
2549 | ||
2550 | static int | |
2551 | eq_file_name_entry (const void *a, const void *b) | |
2552 | { | |
2553 | const struct quick_file_names *ea = a; | |
2554 | const struct quick_file_names *eb = b; | |
2555 | ||
094b34ac | 2556 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2557 | } |
2558 | ||
2559 | /* Delete function for a quick_file_names. */ | |
2560 | ||
2561 | static void | |
2562 | delete_file_name_entry (void *e) | |
2563 | { | |
2564 | struct quick_file_names *file_data = e; | |
2565 | int i; | |
2566 | ||
2567 | for (i = 0; i < file_data->num_file_names; ++i) | |
2568 | { | |
2569 | xfree ((void*) file_data->file_names[i]); | |
2570 | if (file_data->real_names) | |
2571 | xfree ((void*) file_data->real_names[i]); | |
2572 | } | |
2573 | ||
2574 | /* The space for the struct itself lives on objfile_obstack, | |
2575 | so we don't free it here. */ | |
2576 | } | |
2577 | ||
2578 | /* Create a quick_file_names hash table. */ | |
2579 | ||
2580 | static htab_t | |
2581 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2582 | { | |
2583 | return htab_create_alloc (nr_initial_entries, | |
2584 | hash_file_name_entry, eq_file_name_entry, | |
2585 | delete_file_name_entry, xcalloc, xfree); | |
2586 | } | |
9291a0cd | 2587 | |
918dd910 JK |
2588 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2589 | have to be created afterwards. You should call age_cached_comp_units after | |
2590 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2591 | ||
2592 | static void | |
2593 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2594 | { | |
3019eac3 | 2595 | if (per_cu->is_debug_types) |
e5fe5e75 | 2596 | load_full_type_unit (per_cu); |
918dd910 | 2597 | else |
95554aad | 2598 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2599 | |
918dd910 | 2600 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2601 | |
2602 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2603 | } |
2604 | ||
a0f42c21 | 2605 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2606 | |
9291a0cd | 2607 | static void |
a0f42c21 | 2608 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2609 | { |
2610 | struct cleanup *back_to; | |
2611 | ||
f4dc4d17 DE |
2612 | /* Skip type_unit_groups, reading the type units they contain |
2613 | is handled elsewhere. */ | |
2614 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2615 | return; | |
2616 | ||
9291a0cd TT |
2617 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2618 | ||
95554aad TT |
2619 | if (dwarf2_per_objfile->using_index |
2620 | ? per_cu->v.quick->symtab == NULL | |
2621 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2622 | { | |
2623 | queue_comp_unit (per_cu, language_minimal); | |
2624 | load_cu (per_cu); | |
89e63ee4 DE |
2625 | |
2626 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2627 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2628 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2629 | if (!per_cu->is_debug_types | |
2630 | && per_cu->cu->dwo_unit != NULL | |
2631 | && dwarf2_per_objfile->index_table != NULL | |
2632 | && dwarf2_per_objfile->index_table->version <= 7 | |
2633 | /* DWP files aren't supported yet. */ | |
2634 | && get_dwp_file () == NULL) | |
2635 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2636 | } |
9291a0cd | 2637 | |
a0f42c21 | 2638 | process_queue (); |
9291a0cd TT |
2639 | |
2640 | /* Age the cache, releasing compilation units that have not | |
2641 | been used recently. */ | |
2642 | age_cached_comp_units (); | |
2643 | ||
2644 | do_cleanups (back_to); | |
2645 | } | |
2646 | ||
2647 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2648 | the objfile from which this CU came. Returns the resulting symbol | |
2649 | table. */ | |
2fdf6df6 | 2650 | |
9291a0cd | 2651 | static struct symtab * |
a0f42c21 | 2652 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2653 | { |
95554aad | 2654 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2655 | if (!per_cu->v.quick->symtab) |
2656 | { | |
2657 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2658 | increment_reading_symtab (); | |
a0f42c21 | 2659 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2660 | process_cu_includes (); |
9291a0cd TT |
2661 | do_cleanups (back_to); |
2662 | } | |
2663 | return per_cu->v.quick->symtab; | |
2664 | } | |
2665 | ||
8832e7e3 | 2666 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2667 | |
2668 | This is intended for loops like: | |
2669 | ||
2670 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2671 | + dwarf2_per_objfile->n_type_units); ++i) | |
2672 | { | |
8832e7e3 | 2673 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2674 | |
2675 | ...; | |
2676 | } | |
2677 | */ | |
2fdf6df6 | 2678 | |
1fd400ff | 2679 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2680 | dw2_get_cutu (int index) |
1fd400ff TT |
2681 | { |
2682 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2683 | { | |
f4dc4d17 | 2684 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2685 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2686 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2687 | } |
2688 | ||
2689 | return dwarf2_per_objfile->all_comp_units[index]; | |
2690 | } | |
2691 | ||
8832e7e3 DE |
2692 | /* Return the CU given its index. |
2693 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2694 | refers to a CU. */ | |
f4dc4d17 DE |
2695 | |
2696 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2697 | dw2_get_cu (int index) |
f4dc4d17 | 2698 | { |
8832e7e3 | 2699 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2700 | |
1fd400ff TT |
2701 | return dwarf2_per_objfile->all_comp_units[index]; |
2702 | } | |
2703 | ||
2ec9a5e0 TT |
2704 | /* A helper for create_cus_from_index that handles a given list of |
2705 | CUs. */ | |
2fdf6df6 | 2706 | |
74a0d9f6 | 2707 | static void |
2ec9a5e0 TT |
2708 | create_cus_from_index_list (struct objfile *objfile, |
2709 | const gdb_byte *cu_list, offset_type n_elements, | |
2710 | struct dwarf2_section_info *section, | |
2711 | int is_dwz, | |
2712 | int base_offset) | |
9291a0cd TT |
2713 | { |
2714 | offset_type i; | |
9291a0cd | 2715 | |
2ec9a5e0 | 2716 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2717 | { |
2718 | struct dwarf2_per_cu_data *the_cu; | |
2719 | ULONGEST offset, length; | |
2720 | ||
74a0d9f6 JK |
2721 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2722 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2723 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2724 | cu_list += 2 * 8; |
2725 | ||
2726 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2727 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2728 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2729 | the_cu->length = length; |
2730 | the_cu->objfile = objfile; | |
8a0459fd | 2731 | the_cu->section = section; |
9291a0cd TT |
2732 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2733 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2734 | the_cu->is_dwz = is_dwz; |
2735 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2736 | } |
9291a0cd TT |
2737 | } |
2738 | ||
2ec9a5e0 | 2739 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2740 | the CU objects for this objfile. */ |
2ec9a5e0 | 2741 | |
74a0d9f6 | 2742 | static void |
2ec9a5e0 TT |
2743 | create_cus_from_index (struct objfile *objfile, |
2744 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2745 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2746 | { | |
2747 | struct dwz_file *dwz; | |
2748 | ||
2749 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2750 | dwarf2_per_objfile->all_comp_units | |
2751 | = obstack_alloc (&objfile->objfile_obstack, | |
2752 | dwarf2_per_objfile->n_comp_units | |
2753 | * sizeof (struct dwarf2_per_cu_data *)); | |
2754 | ||
74a0d9f6 JK |
2755 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2756 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2757 | |
2758 | if (dwz_elements == 0) | |
74a0d9f6 | 2759 | return; |
2ec9a5e0 TT |
2760 | |
2761 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2762 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2763 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2764 | } |
2765 | ||
1fd400ff | 2766 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2767 | |
74a0d9f6 | 2768 | static void |
673bfd45 | 2769 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2770 | struct dwarf2_section_info *section, |
673bfd45 DE |
2771 | const gdb_byte *bytes, |
2772 | offset_type elements) | |
1fd400ff TT |
2773 | { |
2774 | offset_type i; | |
673bfd45 | 2775 | htab_t sig_types_hash; |
1fd400ff | 2776 | |
6aa5f3a6 DE |
2777 | dwarf2_per_objfile->n_type_units |
2778 | = dwarf2_per_objfile->n_allocated_type_units | |
2779 | = elements / 3; | |
d467dd73 | 2780 | dwarf2_per_objfile->all_type_units |
a2ce51a0 DE |
2781 | = xmalloc (dwarf2_per_objfile->n_type_units |
2782 | * sizeof (struct signatured_type *)); | |
1fd400ff | 2783 | |
673bfd45 | 2784 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2785 | |
2786 | for (i = 0; i < elements; i += 3) | |
2787 | { | |
52dc124a DE |
2788 | struct signatured_type *sig_type; |
2789 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2790 | void **slot; |
2791 | ||
74a0d9f6 JK |
2792 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2793 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2794 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2795 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2796 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2797 | bytes += 3 * 8; | |
2798 | ||
52dc124a | 2799 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2800 | struct signatured_type); |
52dc124a | 2801 | sig_type->signature = signature; |
3019eac3 DE |
2802 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2803 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2804 | sig_type->per_cu.section = section; |
52dc124a DE |
2805 | sig_type->per_cu.offset.sect_off = offset; |
2806 | sig_type->per_cu.objfile = objfile; | |
2807 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2808 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2809 | struct dwarf2_per_cu_quick_data); | |
2810 | ||
52dc124a DE |
2811 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2812 | *slot = sig_type; | |
1fd400ff | 2813 | |
b4dd5633 | 2814 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2815 | } |
2816 | ||
673bfd45 | 2817 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2818 | } |
2819 | ||
9291a0cd TT |
2820 | /* Read the address map data from the mapped index, and use it to |
2821 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2822 | |
9291a0cd TT |
2823 | static void |
2824 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2825 | { | |
2826 | const gdb_byte *iter, *end; | |
2827 | struct obstack temp_obstack; | |
2828 | struct addrmap *mutable_map; | |
2829 | struct cleanup *cleanup; | |
2830 | CORE_ADDR baseaddr; | |
2831 | ||
2832 | obstack_init (&temp_obstack); | |
2833 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2834 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2835 | ||
2836 | iter = index->address_table; | |
2837 | end = iter + index->address_table_size; | |
2838 | ||
2839 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2840 | ||
2841 | while (iter < end) | |
2842 | { | |
2843 | ULONGEST hi, lo, cu_index; | |
2844 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2845 | iter += 8; | |
2846 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2847 | iter += 8; | |
2848 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2849 | iter += 4; | |
f652bce2 | 2850 | |
24a55014 | 2851 | if (lo > hi) |
f652bce2 | 2852 | { |
24a55014 DE |
2853 | complaint (&symfile_complaints, |
2854 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2855 | hex_string (lo), hex_string (hi)); |
24a55014 | 2856 | continue; |
f652bce2 | 2857 | } |
24a55014 DE |
2858 | |
2859 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2860 | { |
2861 | complaint (&symfile_complaints, | |
2862 | _(".gdb_index address table has invalid CU number %u"), | |
2863 | (unsigned) cu_index); | |
24a55014 | 2864 | continue; |
f652bce2 | 2865 | } |
24a55014 DE |
2866 | |
2867 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
8832e7e3 | 2868 | dw2_get_cutu (cu_index)); |
9291a0cd TT |
2869 | } |
2870 | ||
2871 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2872 | &objfile->objfile_obstack); | |
2873 | do_cleanups (cleanup); | |
2874 | } | |
2875 | ||
59d7bcaf JK |
2876 | /* The hash function for strings in the mapped index. This is the same as |
2877 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2878 | implementation. This is necessary because the hash function is tied to the | |
2879 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2880 | SYMBOL_HASH_NEXT. |
2881 | ||
2882 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2883 | |
9291a0cd | 2884 | static hashval_t |
559a7a62 | 2885 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2886 | { |
2887 | const unsigned char *str = (const unsigned char *) p; | |
2888 | hashval_t r = 0; | |
2889 | unsigned char c; | |
2890 | ||
2891 | while ((c = *str++) != 0) | |
559a7a62 JK |
2892 | { |
2893 | if (index_version >= 5) | |
2894 | c = tolower (c); | |
2895 | r = r * 67 + c - 113; | |
2896 | } | |
9291a0cd TT |
2897 | |
2898 | return r; | |
2899 | } | |
2900 | ||
2901 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2902 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2903 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2904 | |
9291a0cd TT |
2905 | static int |
2906 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2907 | offset_type **vec_out) | |
2908 | { | |
0cf03b49 JK |
2909 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2910 | offset_type hash; | |
9291a0cd | 2911 | offset_type slot, step; |
559a7a62 | 2912 | int (*cmp) (const char *, const char *); |
9291a0cd | 2913 | |
0cf03b49 JK |
2914 | if (current_language->la_language == language_cplus |
2915 | || current_language->la_language == language_java | |
2916 | || current_language->la_language == language_fortran) | |
2917 | { | |
2918 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2919 | not contain any. */ | |
2920 | const char *paren = strchr (name, '('); | |
2921 | ||
2922 | if (paren) | |
2923 | { | |
2924 | char *dup; | |
2925 | ||
2926 | dup = xmalloc (paren - name + 1); | |
2927 | memcpy (dup, name, paren - name); | |
2928 | dup[paren - name] = 0; | |
2929 | ||
2930 | make_cleanup (xfree, dup); | |
2931 | name = dup; | |
2932 | } | |
2933 | } | |
2934 | ||
559a7a62 | 2935 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2936 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2937 | simulate our NAME being searched is also lowercased. */ |
2938 | hash = mapped_index_string_hash ((index->version == 4 | |
2939 | && case_sensitivity == case_sensitive_off | |
2940 | ? 5 : index->version), | |
2941 | name); | |
2942 | ||
3876f04e DE |
2943 | slot = hash & (index->symbol_table_slots - 1); |
2944 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2945 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2946 | |
2947 | for (;;) | |
2948 | { | |
2949 | /* Convert a slot number to an offset into the table. */ | |
2950 | offset_type i = 2 * slot; | |
2951 | const char *str; | |
3876f04e | 2952 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2953 | { |
2954 | do_cleanups (back_to); | |
2955 | return 0; | |
2956 | } | |
9291a0cd | 2957 | |
3876f04e | 2958 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2959 | if (!cmp (name, str)) |
9291a0cd TT |
2960 | { |
2961 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2962 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2963 | do_cleanups (back_to); |
9291a0cd TT |
2964 | return 1; |
2965 | } | |
2966 | ||
3876f04e | 2967 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2968 | } |
2969 | } | |
2970 | ||
2ec9a5e0 TT |
2971 | /* A helper function that reads the .gdb_index from SECTION and fills |
2972 | in MAP. FILENAME is the name of the file containing the section; | |
2973 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2974 | ok to use deprecated sections. | |
2975 | ||
2976 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2977 | out parameters that are filled in with information about the CU and | |
2978 | TU lists in the section. | |
2979 | ||
2980 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2981 | |
9291a0cd | 2982 | static int |
2ec9a5e0 TT |
2983 | read_index_from_section (struct objfile *objfile, |
2984 | const char *filename, | |
2985 | int deprecated_ok, | |
2986 | struct dwarf2_section_info *section, | |
2987 | struct mapped_index *map, | |
2988 | const gdb_byte **cu_list, | |
2989 | offset_type *cu_list_elements, | |
2990 | const gdb_byte **types_list, | |
2991 | offset_type *types_list_elements) | |
9291a0cd | 2992 | { |
948f8e3d | 2993 | const gdb_byte *addr; |
2ec9a5e0 | 2994 | offset_type version; |
b3b272e1 | 2995 | offset_type *metadata; |
1fd400ff | 2996 | int i; |
9291a0cd | 2997 | |
2ec9a5e0 | 2998 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2999 | return 0; |
82430852 JK |
3000 | |
3001 | /* Older elfutils strip versions could keep the section in the main | |
3002 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3003 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3004 | return 0; |
3005 | ||
2ec9a5e0 | 3006 | dwarf2_read_section (objfile, section); |
9291a0cd | 3007 | |
2ec9a5e0 | 3008 | addr = section->buffer; |
9291a0cd | 3009 | /* Version check. */ |
1fd400ff | 3010 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3011 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3012 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3013 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3014 | indices. */ |
831adc1f | 3015 | if (version < 4) |
481860b3 GB |
3016 | { |
3017 | static int warning_printed = 0; | |
3018 | if (!warning_printed) | |
3019 | { | |
3020 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3021 | filename); |
481860b3 GB |
3022 | warning_printed = 1; |
3023 | } | |
3024 | return 0; | |
3025 | } | |
3026 | /* Index version 4 uses a different hash function than index version | |
3027 | 5 and later. | |
3028 | ||
3029 | Versions earlier than 6 did not emit psymbols for inlined | |
3030 | functions. Using these files will cause GDB not to be able to | |
3031 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3032 | indices unless the user has done |
3033 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3034 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3035 | { |
3036 | static int warning_printed = 0; | |
3037 | if (!warning_printed) | |
3038 | { | |
e615022a DE |
3039 | warning (_("\ |
3040 | Skipping deprecated .gdb_index section in %s.\n\ | |
3041 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3042 | to use the section anyway."), | |
2ec9a5e0 | 3043 | filename); |
481860b3 GB |
3044 | warning_printed = 1; |
3045 | } | |
3046 | return 0; | |
3047 | } | |
796a7ff8 | 3048 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3049 | of the TU (for symbols coming from TUs), |
3050 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3051 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3052 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3053 | These are just performance bugs, and we can't distinguish gdb-generated | |
3054 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3055 | |
481860b3 | 3056 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3057 | longer backward compatible. */ |
796a7ff8 | 3058 | if (version > 8) |
594e8718 | 3059 | return 0; |
9291a0cd | 3060 | |
559a7a62 | 3061 | map->version = version; |
2ec9a5e0 | 3062 | map->total_size = section->size; |
9291a0cd TT |
3063 | |
3064 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3065 | |
3066 | i = 0; | |
2ec9a5e0 TT |
3067 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3068 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3069 | / 8); | |
1fd400ff TT |
3070 | ++i; |
3071 | ||
2ec9a5e0 TT |
3072 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3073 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3074 | - MAYBE_SWAP (metadata[i])) | |
3075 | / 8); | |
987d643c | 3076 | ++i; |
1fd400ff TT |
3077 | |
3078 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3079 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3080 | - MAYBE_SWAP (metadata[i])); | |
3081 | ++i; | |
3082 | ||
3876f04e DE |
3083 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3084 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3085 | - MAYBE_SWAP (metadata[i])) | |
3086 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3087 | ++i; |
9291a0cd | 3088 | |
f9d83a0b | 3089 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3090 | |
2ec9a5e0 TT |
3091 | return 1; |
3092 | } | |
3093 | ||
3094 | ||
3095 | /* Read the index file. If everything went ok, initialize the "quick" | |
3096 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3097 | ||
3098 | static int | |
3099 | dwarf2_read_index (struct objfile *objfile) | |
3100 | { | |
3101 | struct mapped_index local_map, *map; | |
3102 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3103 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3104 | struct dwz_file *dwz; |
2ec9a5e0 | 3105 | |
4262abfb | 3106 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3107 | use_deprecated_index_sections, |
3108 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3109 | &cu_list, &cu_list_elements, | |
3110 | &types_list, &types_list_elements)) | |
3111 | return 0; | |
3112 | ||
0fefef59 | 3113 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3114 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3115 | return 0; |
3116 | ||
2ec9a5e0 TT |
3117 | /* If there is a .dwz file, read it so we can get its CU list as |
3118 | well. */ | |
4db1a1dc TT |
3119 | dwz = dwarf2_get_dwz_file (); |
3120 | if (dwz != NULL) | |
2ec9a5e0 | 3121 | { |
2ec9a5e0 TT |
3122 | struct mapped_index dwz_map; |
3123 | const gdb_byte *dwz_types_ignore; | |
3124 | offset_type dwz_types_elements_ignore; | |
3125 | ||
3126 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3127 | 1, | |
3128 | &dwz->gdb_index, &dwz_map, | |
3129 | &dwz_list, &dwz_list_elements, | |
3130 | &dwz_types_ignore, | |
3131 | &dwz_types_elements_ignore)) | |
3132 | { | |
3133 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3134 | bfd_get_filename (dwz->dwz_bfd)); | |
3135 | return 0; | |
3136 | } | |
3137 | } | |
3138 | ||
74a0d9f6 JK |
3139 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3140 | dwz_list_elements); | |
1fd400ff | 3141 | |
8b70b953 TT |
3142 | if (types_list_elements) |
3143 | { | |
3144 | struct dwarf2_section_info *section; | |
3145 | ||
3146 | /* We can only handle a single .debug_types when we have an | |
3147 | index. */ | |
3148 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3149 | return 0; | |
3150 | ||
3151 | section = VEC_index (dwarf2_section_info_def, | |
3152 | dwarf2_per_objfile->types, 0); | |
3153 | ||
74a0d9f6 JK |
3154 | create_signatured_type_table_from_index (objfile, section, types_list, |
3155 | types_list_elements); | |
8b70b953 | 3156 | } |
9291a0cd | 3157 | |
2ec9a5e0 TT |
3158 | create_addrmap_from_index (objfile, &local_map); |
3159 | ||
3160 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
3161 | *map = local_map; | |
9291a0cd TT |
3162 | |
3163 | dwarf2_per_objfile->index_table = map; | |
3164 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3165 | dwarf2_per_objfile->quick_file_names_table = |
3166 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3167 | |
3168 | return 1; | |
3169 | } | |
3170 | ||
3171 | /* A helper for the "quick" functions which sets the global | |
3172 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3173 | |
9291a0cd TT |
3174 | static void |
3175 | dw2_setup (struct objfile *objfile) | |
3176 | { | |
3177 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
3178 | gdb_assert (dwarf2_per_objfile); | |
3179 | } | |
3180 | ||
dee91e82 | 3181 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3182 | |
dee91e82 DE |
3183 | static void |
3184 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3185 | const gdb_byte *info_ptr, |
dee91e82 DE |
3186 | struct die_info *comp_unit_die, |
3187 | int has_children, | |
3188 | void *data) | |
9291a0cd | 3189 | { |
dee91e82 DE |
3190 | struct dwarf2_cu *cu = reader->cu; |
3191 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3192 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3193 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3194 | struct line_header *lh; |
9291a0cd | 3195 | struct attribute *attr; |
dee91e82 | 3196 | int i; |
15d034d0 | 3197 | const char *name, *comp_dir; |
7b9f3c50 DE |
3198 | void **slot; |
3199 | struct quick_file_names *qfn; | |
3200 | unsigned int line_offset; | |
9291a0cd | 3201 | |
0186c6a7 DE |
3202 | gdb_assert (! this_cu->is_debug_types); |
3203 | ||
07261596 TT |
3204 | /* Our callers never want to match partial units -- instead they |
3205 | will match the enclosing full CU. */ | |
3206 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3207 | { | |
3208 | this_cu->v.quick->no_file_data = 1; | |
3209 | return; | |
3210 | } | |
3211 | ||
0186c6a7 | 3212 | lh_cu = this_cu; |
7b9f3c50 DE |
3213 | lh = NULL; |
3214 | slot = NULL; | |
3215 | line_offset = 0; | |
dee91e82 DE |
3216 | |
3217 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3218 | if (attr) |
3219 | { | |
7b9f3c50 DE |
3220 | struct quick_file_names find_entry; |
3221 | ||
3222 | line_offset = DW_UNSND (attr); | |
3223 | ||
3224 | /* We may have already read in this line header (TU line header sharing). | |
3225 | If we have we're done. */ | |
094b34ac DE |
3226 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3227 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3228 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3229 | &find_entry, INSERT); | |
3230 | if (*slot != NULL) | |
3231 | { | |
094b34ac | 3232 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 3233 | return; |
7b9f3c50 DE |
3234 | } |
3235 | ||
3019eac3 | 3236 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3237 | } |
3238 | if (lh == NULL) | |
3239 | { | |
094b34ac | 3240 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3241 | return; |
9291a0cd TT |
3242 | } |
3243 | ||
7b9f3c50 | 3244 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
3245 | qfn->hash.dwo_unit = cu->dwo_unit; |
3246 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3247 | gdb_assert (slot != NULL); |
3248 | *slot = qfn; | |
9291a0cd | 3249 | |
dee91e82 | 3250 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3251 | |
7b9f3c50 DE |
3252 | qfn->num_file_names = lh->num_file_names; |
3253 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
3254 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 3255 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3256 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3257 | qfn->real_names = NULL; | |
9291a0cd | 3258 | |
7b9f3c50 | 3259 | free_line_header (lh); |
7b9f3c50 | 3260 | |
094b34ac | 3261 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3262 | } |
3263 | ||
3264 | /* A helper for the "quick" functions which attempts to read the line | |
3265 | table for THIS_CU. */ | |
3266 | ||
3267 | static struct quick_file_names * | |
e4a48d9d | 3268 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3269 | { |
0186c6a7 DE |
3270 | /* This should never be called for TUs. */ |
3271 | gdb_assert (! this_cu->is_debug_types); | |
3272 | /* Nor type unit groups. */ | |
3273 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3274 | |
dee91e82 DE |
3275 | if (this_cu->v.quick->file_names != NULL) |
3276 | return this_cu->v.quick->file_names; | |
3277 | /* If we know there is no line data, no point in looking again. */ | |
3278 | if (this_cu->v.quick->no_file_data) | |
3279 | return NULL; | |
3280 | ||
0186c6a7 | 3281 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3282 | |
3283 | if (this_cu->v.quick->no_file_data) | |
3284 | return NULL; | |
3285 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3286 | } |
3287 | ||
3288 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3289 | real path for a given file name from the line table. */ |
2fdf6df6 | 3290 | |
9291a0cd | 3291 | static const char * |
7b9f3c50 DE |
3292 | dw2_get_real_path (struct objfile *objfile, |
3293 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3294 | { |
7b9f3c50 DE |
3295 | if (qfn->real_names == NULL) |
3296 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3297 | qfn->num_file_names, const char *); |
9291a0cd | 3298 | |
7b9f3c50 DE |
3299 | if (qfn->real_names[index] == NULL) |
3300 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3301 | |
7b9f3c50 | 3302 | return qfn->real_names[index]; |
9291a0cd TT |
3303 | } |
3304 | ||
3305 | static struct symtab * | |
3306 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3307 | { | |
3308 | int index; | |
ae2de4f8 | 3309 | |
9291a0cd TT |
3310 | dw2_setup (objfile); |
3311 | index = dwarf2_per_objfile->n_comp_units - 1; | |
8832e7e3 | 3312 | return dw2_instantiate_symtab (dw2_get_cutu (index)); |
9291a0cd TT |
3313 | } |
3314 | ||
7b9f3c50 DE |
3315 | /* Traversal function for dw2_forget_cached_source_info. */ |
3316 | ||
3317 | static int | |
3318 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3319 | { |
7b9f3c50 | 3320 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3321 | |
7b9f3c50 | 3322 | if (file_data->real_names) |
9291a0cd | 3323 | { |
7b9f3c50 | 3324 | int i; |
9291a0cd | 3325 | |
7b9f3c50 | 3326 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3327 | { |
7b9f3c50 DE |
3328 | xfree ((void*) file_data->real_names[i]); |
3329 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3330 | } |
3331 | } | |
7b9f3c50 DE |
3332 | |
3333 | return 1; | |
3334 | } | |
3335 | ||
3336 | static void | |
3337 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3338 | { | |
3339 | dw2_setup (objfile); | |
3340 | ||
3341 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3342 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3343 | } |
3344 | ||
f8eba3c6 TT |
3345 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3346 | the symtabs and calls the iterator. */ | |
3347 | ||
3348 | static int | |
3349 | dw2_map_expand_apply (struct objfile *objfile, | |
3350 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3351 | const char *name, const char *real_path, |
f8eba3c6 TT |
3352 | int (*callback) (struct symtab *, void *), |
3353 | void *data) | |
3354 | { | |
3355 | struct symtab *last_made = objfile->symtabs; | |
3356 | ||
3357 | /* Don't visit already-expanded CUs. */ | |
3358 | if (per_cu->v.quick->symtab) | |
3359 | return 0; | |
3360 | ||
3361 | /* This may expand more than one symtab, and we want to iterate over | |
3362 | all of them. */ | |
a0f42c21 | 3363 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3364 | |
f5b95b50 | 3365 | return iterate_over_some_symtabs (name, real_path, callback, data, |
f8eba3c6 TT |
3366 | objfile->symtabs, last_made); |
3367 | } | |
3368 | ||
3369 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3370 | ||
9291a0cd | 3371 | static int |
f8eba3c6 | 3372 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3373 | const char *real_path, |
f8eba3c6 TT |
3374 | int (*callback) (struct symtab *, void *), |
3375 | void *data) | |
9291a0cd TT |
3376 | { |
3377 | int i; | |
c011a4f4 | 3378 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3379 | |
3380 | dw2_setup (objfile); | |
ae2de4f8 | 3381 | |
848e3e78 DE |
3382 | /* The rule is CUs specify all the files, including those used by |
3383 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3384 | |
848e3e78 | 3385 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3386 | { |
3387 | int j; | |
8832e7e3 | 3388 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3389 | struct quick_file_names *file_data; |
9291a0cd | 3390 | |
3d7bb9d9 | 3391 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3392 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3393 | continue; |
3394 | ||
e4a48d9d | 3395 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3396 | if (file_data == NULL) |
9291a0cd TT |
3397 | continue; |
3398 | ||
7b9f3c50 | 3399 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3400 | { |
7b9f3c50 | 3401 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3402 | const char *this_real_name; |
9291a0cd | 3403 | |
af529f8f | 3404 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3405 | { |
f5b95b50 | 3406 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3407 | callback, data)) |
3408 | return 1; | |
288e77a7 | 3409 | continue; |
4aac40c8 | 3410 | } |
9291a0cd | 3411 | |
c011a4f4 DE |
3412 | /* Before we invoke realpath, which can get expensive when many |
3413 | files are involved, do a quick comparison of the basenames. */ | |
3414 | if (! basenames_may_differ | |
3415 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3416 | continue; | |
3417 | ||
da235a7c JK |
3418 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3419 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3420 | { |
da235a7c JK |
3421 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3422 | callback, data)) | |
3423 | return 1; | |
288e77a7 | 3424 | continue; |
da235a7c | 3425 | } |
9291a0cd | 3426 | |
da235a7c JK |
3427 | if (real_path != NULL) |
3428 | { | |
af529f8f JK |
3429 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3430 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3431 | if (this_real_name != NULL |
af529f8f | 3432 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3433 | { |
f5b95b50 | 3434 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3435 | callback, data)) |
3436 | return 1; | |
288e77a7 | 3437 | continue; |
9291a0cd TT |
3438 | } |
3439 | } | |
3440 | } | |
3441 | } | |
3442 | ||
9291a0cd TT |
3443 | return 0; |
3444 | } | |
3445 | ||
da51c347 DE |
3446 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3447 | ||
3448 | struct dw2_symtab_iterator | |
9291a0cd | 3449 | { |
da51c347 DE |
3450 | /* The internalized form of .gdb_index. */ |
3451 | struct mapped_index *index; | |
3452 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3453 | int want_specific_block; | |
3454 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3455 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3456 | int block_index; | |
3457 | /* The kind of symbol we're looking for. */ | |
3458 | domain_enum domain; | |
3459 | /* The list of CUs from the index entry of the symbol, | |
3460 | or NULL if not found. */ | |
3461 | offset_type *vec; | |
3462 | /* The next element in VEC to look at. */ | |
3463 | int next; | |
3464 | /* The number of elements in VEC, or zero if there is no match. */ | |
3465 | int length; | |
8943b874 DE |
3466 | /* Have we seen a global version of the symbol? |
3467 | If so we can ignore all further global instances. | |
3468 | This is to work around gold/15646, inefficient gold-generated | |
3469 | indices. */ | |
3470 | int global_seen; | |
da51c347 | 3471 | }; |
9291a0cd | 3472 | |
da51c347 DE |
3473 | /* Initialize the index symtab iterator ITER. |
3474 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3475 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3476 | |
9291a0cd | 3477 | static void |
da51c347 DE |
3478 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3479 | struct mapped_index *index, | |
3480 | int want_specific_block, | |
3481 | int block_index, | |
3482 | domain_enum domain, | |
3483 | const char *name) | |
3484 | { | |
3485 | iter->index = index; | |
3486 | iter->want_specific_block = want_specific_block; | |
3487 | iter->block_index = block_index; | |
3488 | iter->domain = domain; | |
3489 | iter->next = 0; | |
8943b874 | 3490 | iter->global_seen = 0; |
da51c347 DE |
3491 | |
3492 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3493 | iter->length = MAYBE_SWAP (*iter->vec); | |
3494 | else | |
3495 | { | |
3496 | iter->vec = NULL; | |
3497 | iter->length = 0; | |
3498 | } | |
3499 | } | |
3500 | ||
3501 | /* Return the next matching CU or NULL if there are no more. */ | |
3502 | ||
3503 | static struct dwarf2_per_cu_data * | |
3504 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3505 | { | |
3506 | for ( ; iter->next < iter->length; ++iter->next) | |
3507 | { | |
3508 | offset_type cu_index_and_attrs = | |
3509 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3510 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3511 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3512 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3513 | /* This value is only valid for index versions >= 7. */ | |
3514 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3515 | gdb_index_symbol_kind symbol_kind = | |
3516 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3517 | /* Only check the symbol attributes if they're present. | |
3518 | Indices prior to version 7 don't record them, | |
3519 | and indices >= 7 may elide them for certain symbols | |
3520 | (gold does this). */ | |
3521 | int attrs_valid = | |
3522 | (iter->index->version >= 7 | |
3523 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3524 | ||
3190f0c6 DE |
3525 | /* Don't crash on bad data. */ |
3526 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3527 | + dwarf2_per_objfile->n_type_units)) | |
3528 | { | |
3529 | complaint (&symfile_complaints, | |
3530 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3531 | " [in module %s]"), |
3532 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3533 | continue; |
3534 | } | |
3535 | ||
8832e7e3 | 3536 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3537 | |
da51c347 DE |
3538 | /* Skip if already read in. */ |
3539 | if (per_cu->v.quick->symtab) | |
3540 | continue; | |
3541 | ||
8943b874 DE |
3542 | /* Check static vs global. */ |
3543 | if (attrs_valid) | |
3544 | { | |
3545 | if (iter->want_specific_block | |
3546 | && want_static != is_static) | |
3547 | continue; | |
3548 | /* Work around gold/15646. */ | |
3549 | if (!is_static && iter->global_seen) | |
3550 | continue; | |
3551 | if (!is_static) | |
3552 | iter->global_seen = 1; | |
3553 | } | |
da51c347 DE |
3554 | |
3555 | /* Only check the symbol's kind if it has one. */ | |
3556 | if (attrs_valid) | |
3557 | { | |
3558 | switch (iter->domain) | |
3559 | { | |
3560 | case VAR_DOMAIN: | |
3561 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3562 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3563 | /* Some types are also in VAR_DOMAIN. */ | |
3564 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3565 | continue; | |
3566 | break; | |
3567 | case STRUCT_DOMAIN: | |
3568 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3569 | continue; | |
3570 | break; | |
3571 | case LABEL_DOMAIN: | |
3572 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3573 | continue; | |
3574 | break; | |
3575 | default: | |
3576 | break; | |
3577 | } | |
3578 | } | |
3579 | ||
3580 | ++iter->next; | |
3581 | return per_cu; | |
3582 | } | |
3583 | ||
3584 | return NULL; | |
3585 | } | |
3586 | ||
3587 | static struct symtab * | |
3588 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3589 | const char *name, domain_enum domain) | |
9291a0cd | 3590 | { |
da51c347 | 3591 | struct symtab *stab_best = NULL; |
156942c7 DE |
3592 | struct mapped_index *index; |
3593 | ||
9291a0cd TT |
3594 | dw2_setup (objfile); |
3595 | ||
156942c7 DE |
3596 | index = dwarf2_per_objfile->index_table; |
3597 | ||
da51c347 | 3598 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3599 | if (index) |
9291a0cd | 3600 | { |
da51c347 DE |
3601 | struct dw2_symtab_iterator iter; |
3602 | struct dwarf2_per_cu_data *per_cu; | |
3603 | ||
3604 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3605 | |
da51c347 | 3606 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3607 | { |
da51c347 DE |
3608 | struct symbol *sym = NULL; |
3609 | struct symtab *stab = dw2_instantiate_symtab (per_cu); | |
3610 | ||
3611 | /* Some caution must be observed with overloaded functions | |
3612 | and methods, since the index will not contain any overload | |
3613 | information (but NAME might contain it). */ | |
3614 | if (stab->primary) | |
9291a0cd | 3615 | { |
346d1dfe | 3616 | const struct blockvector *bv = BLOCKVECTOR (stab); |
da51c347 | 3617 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
156942c7 | 3618 | |
da51c347 DE |
3619 | sym = lookup_block_symbol (block, name, domain); |
3620 | } | |
1fd400ff | 3621 | |
da51c347 DE |
3622 | if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
3623 | { | |
3624 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) | |
3625 | return stab; | |
3626 | ||
3627 | stab_best = stab; | |
9291a0cd | 3628 | } |
da51c347 DE |
3629 | |
3630 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3631 | } |
3632 | } | |
9291a0cd | 3633 | |
da51c347 | 3634 | return stab_best; |
9291a0cd TT |
3635 | } |
3636 | ||
3637 | static void | |
3638 | dw2_print_stats (struct objfile *objfile) | |
3639 | { | |
e4a48d9d | 3640 | int i, total, count; |
9291a0cd TT |
3641 | |
3642 | dw2_setup (objfile); | |
e4a48d9d | 3643 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3644 | count = 0; |
e4a48d9d | 3645 | for (i = 0; i < total; ++i) |
9291a0cd | 3646 | { |
8832e7e3 | 3647 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3648 | |
e254ef6a | 3649 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3650 | ++count; |
3651 | } | |
e4a48d9d | 3652 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3653 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3654 | } | |
3655 | ||
779bd270 DE |
3656 | /* This dumps minimal information about the index. |
3657 | It is called via "mt print objfiles". | |
3658 | One use is to verify .gdb_index has been loaded by the | |
3659 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3660 | ||
9291a0cd TT |
3661 | static void |
3662 | dw2_dump (struct objfile *objfile) | |
3663 | { | |
779bd270 DE |
3664 | dw2_setup (objfile); |
3665 | gdb_assert (dwarf2_per_objfile->using_index); | |
3666 | printf_filtered (".gdb_index:"); | |
3667 | if (dwarf2_per_objfile->index_table != NULL) | |
3668 | { | |
3669 | printf_filtered (" version %d\n", | |
3670 | dwarf2_per_objfile->index_table->version); | |
3671 | } | |
3672 | else | |
3673 | printf_filtered (" faked for \"readnow\"\n"); | |
3674 | printf_filtered ("\n"); | |
9291a0cd TT |
3675 | } |
3676 | ||
3677 | static void | |
3189cb12 DE |
3678 | dw2_relocate (struct objfile *objfile, |
3679 | const struct section_offsets *new_offsets, | |
3680 | const struct section_offsets *delta) | |
9291a0cd TT |
3681 | { |
3682 | /* There's nothing to relocate here. */ | |
3683 | } | |
3684 | ||
3685 | static void | |
3686 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3687 | const char *func_name) | |
3688 | { | |
da51c347 DE |
3689 | struct mapped_index *index; |
3690 | ||
3691 | dw2_setup (objfile); | |
3692 | ||
3693 | index = dwarf2_per_objfile->index_table; | |
3694 | ||
3695 | /* index is NULL if OBJF_READNOW. */ | |
3696 | if (index) | |
3697 | { | |
3698 | struct dw2_symtab_iterator iter; | |
3699 | struct dwarf2_per_cu_data *per_cu; | |
3700 | ||
3701 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3702 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3703 | func_name); | |
3704 | ||
3705 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3706 | dw2_instantiate_symtab (per_cu); | |
3707 | } | |
9291a0cd TT |
3708 | } |
3709 | ||
3710 | static void | |
3711 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3712 | { | |
3713 | int i; | |
3714 | ||
3715 | dw2_setup (objfile); | |
1fd400ff TT |
3716 | |
3717 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3718 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3719 | { |
8832e7e3 | 3720 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3721 | |
a0f42c21 | 3722 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3723 | } |
3724 | } | |
3725 | ||
3726 | static void | |
652a8996 JK |
3727 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3728 | const char *fullname) | |
9291a0cd TT |
3729 | { |
3730 | int i; | |
3731 | ||
3732 | dw2_setup (objfile); | |
d4637a04 DE |
3733 | |
3734 | /* We don't need to consider type units here. | |
3735 | This is only called for examining code, e.g. expand_line_sal. | |
3736 | There can be an order of magnitude (or more) more type units | |
3737 | than comp units, and we avoid them if we can. */ | |
3738 | ||
3739 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3740 | { |
3741 | int j; | |
8832e7e3 | 3742 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 3743 | struct quick_file_names *file_data; |
9291a0cd | 3744 | |
3d7bb9d9 | 3745 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3746 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3747 | continue; |
3748 | ||
e4a48d9d | 3749 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3750 | if (file_data == NULL) |
9291a0cd TT |
3751 | continue; |
3752 | ||
7b9f3c50 | 3753 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3754 | { |
652a8996 JK |
3755 | const char *this_fullname = file_data->file_names[j]; |
3756 | ||
3757 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3758 | { |
a0f42c21 | 3759 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3760 | break; |
3761 | } | |
3762 | } | |
3763 | } | |
3764 | } | |
3765 | ||
9291a0cd | 3766 | static void |
ade7ed9e DE |
3767 | dw2_map_matching_symbols (struct objfile *objfile, |
3768 | const char * name, domain_enum namespace, | |
3769 | int global, | |
40658b94 PH |
3770 | int (*callback) (struct block *, |
3771 | struct symbol *, void *), | |
2edb89d3 JK |
3772 | void *data, symbol_compare_ftype *match, |
3773 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3774 | { |
40658b94 | 3775 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3776 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3777 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3778 | } |
3779 | ||
3780 | static void | |
f8eba3c6 TT |
3781 | dw2_expand_symtabs_matching |
3782 | (struct objfile *objfile, | |
206f2a57 DE |
3783 | expand_symtabs_file_matcher_ftype *file_matcher, |
3784 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, | |
f8eba3c6 TT |
3785 | enum search_domain kind, |
3786 | void *data) | |
9291a0cd TT |
3787 | { |
3788 | int i; | |
3789 | offset_type iter; | |
4b5246aa | 3790 | struct mapped_index *index; |
9291a0cd TT |
3791 | |
3792 | dw2_setup (objfile); | |
ae2de4f8 DE |
3793 | |
3794 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3795 | if (!dwarf2_per_objfile->index_table) |
3796 | return; | |
4b5246aa | 3797 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3798 | |
7b08b9eb | 3799 | if (file_matcher != NULL) |
24c79950 TT |
3800 | { |
3801 | struct cleanup *cleanup; | |
3802 | htab_t visited_found, visited_not_found; | |
3803 | ||
3804 | visited_found = htab_create_alloc (10, | |
3805 | htab_hash_pointer, htab_eq_pointer, | |
3806 | NULL, xcalloc, xfree); | |
3807 | cleanup = make_cleanup_htab_delete (visited_found); | |
3808 | visited_not_found = htab_create_alloc (10, | |
3809 | htab_hash_pointer, htab_eq_pointer, | |
3810 | NULL, xcalloc, xfree); | |
3811 | make_cleanup_htab_delete (visited_not_found); | |
3812 | ||
848e3e78 DE |
3813 | /* The rule is CUs specify all the files, including those used by |
3814 | any TU, so there's no need to scan TUs here. */ | |
3815 | ||
3816 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3817 | { |
3818 | int j; | |
8832e7e3 | 3819 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
3820 | struct quick_file_names *file_data; |
3821 | void **slot; | |
7b08b9eb | 3822 | |
24c79950 | 3823 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3824 | |
24c79950 TT |
3825 | /* We only need to look at symtabs not already expanded. */ |
3826 | if (per_cu->v.quick->symtab) | |
3827 | continue; | |
7b08b9eb | 3828 | |
e4a48d9d | 3829 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3830 | if (file_data == NULL) |
3831 | continue; | |
7b08b9eb | 3832 | |
24c79950 TT |
3833 | if (htab_find (visited_not_found, file_data) != NULL) |
3834 | continue; | |
3835 | else if (htab_find (visited_found, file_data) != NULL) | |
3836 | { | |
3837 | per_cu->v.quick->mark = 1; | |
3838 | continue; | |
3839 | } | |
3840 | ||
3841 | for (j = 0; j < file_data->num_file_names; ++j) | |
3842 | { | |
da235a7c JK |
3843 | const char *this_real_name; |
3844 | ||
fbd9ab74 | 3845 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3846 | { |
3847 | per_cu->v.quick->mark = 1; | |
3848 | break; | |
3849 | } | |
da235a7c JK |
3850 | |
3851 | /* Before we invoke realpath, which can get expensive when many | |
3852 | files are involved, do a quick comparison of the basenames. */ | |
3853 | if (!basenames_may_differ | |
3854 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3855 | data, 1)) | |
3856 | continue; | |
3857 | ||
3858 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3859 | if (file_matcher (this_real_name, data, 0)) | |
3860 | { | |
3861 | per_cu->v.quick->mark = 1; | |
3862 | break; | |
3863 | } | |
24c79950 TT |
3864 | } |
3865 | ||
3866 | slot = htab_find_slot (per_cu->v.quick->mark | |
3867 | ? visited_found | |
3868 | : visited_not_found, | |
3869 | file_data, INSERT); | |
3870 | *slot = file_data; | |
3871 | } | |
3872 | ||
3873 | do_cleanups (cleanup); | |
3874 | } | |
9291a0cd | 3875 | |
3876f04e | 3876 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3877 | { |
3878 | offset_type idx = 2 * iter; | |
3879 | const char *name; | |
3880 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 3881 | int global_seen = 0; |
9291a0cd | 3882 | |
3876f04e | 3883 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3884 | continue; |
3885 | ||
3876f04e | 3886 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3887 | |
206f2a57 | 3888 | if (! (*symbol_matcher) (name, data)) |
9291a0cd TT |
3889 | continue; |
3890 | ||
3891 | /* The name was matched, now expand corresponding CUs that were | |
3892 | marked. */ | |
4b5246aa | 3893 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3894 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3895 | vec_len = MAYBE_SWAP (vec[0]); |
3896 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3897 | { | |
e254ef6a | 3898 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 3899 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
3900 | /* This value is only valid for index versions >= 7. */ |
3901 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
3902 | gdb_index_symbol_kind symbol_kind = |
3903 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3904 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
3905 | /* Only check the symbol attributes if they're present. |
3906 | Indices prior to version 7 don't record them, | |
3907 | and indices >= 7 may elide them for certain symbols | |
3908 | (gold does this). */ | |
3909 | int attrs_valid = | |
3910 | (index->version >= 7 | |
3911 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3912 | ||
8943b874 DE |
3913 | /* Work around gold/15646. */ |
3914 | if (attrs_valid) | |
3915 | { | |
3916 | if (!is_static && global_seen) | |
3917 | continue; | |
3918 | if (!is_static) | |
3919 | global_seen = 1; | |
3920 | } | |
3921 | ||
3190f0c6 DE |
3922 | /* Only check the symbol's kind if it has one. */ |
3923 | if (attrs_valid) | |
156942c7 DE |
3924 | { |
3925 | switch (kind) | |
3926 | { | |
3927 | case VARIABLES_DOMAIN: | |
3928 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3929 | continue; | |
3930 | break; | |
3931 | case FUNCTIONS_DOMAIN: | |
3932 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3933 | continue; | |
3934 | break; | |
3935 | case TYPES_DOMAIN: | |
3936 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3937 | continue; | |
3938 | break; | |
3939 | default: | |
3940 | break; | |
3941 | } | |
3942 | } | |
3943 | ||
3190f0c6 DE |
3944 | /* Don't crash on bad data. */ |
3945 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3946 | + dwarf2_per_objfile->n_type_units)) | |
3947 | { | |
3948 | complaint (&symfile_complaints, | |
3949 | _(".gdb_index entry has bad CU index" | |
4262abfb | 3950 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
3951 | continue; |
3952 | } | |
3953 | ||
8832e7e3 | 3954 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 3955 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3956 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3957 | } |
3958 | } | |
3959 | } | |
3960 | ||
9703b513 TT |
3961 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3962 | symtab. */ | |
3963 | ||
3964 | static struct symtab * | |
3965 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3966 | { | |
3967 | int i; | |
3968 | ||
3969 | if (BLOCKVECTOR (symtab) != NULL | |
3970 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3971 | return symtab; | |
3972 | ||
a3ec0bb1 DE |
3973 | if (symtab->includes == NULL) |
3974 | return NULL; | |
3975 | ||
9703b513 TT |
3976 | for (i = 0; symtab->includes[i]; ++i) |
3977 | { | |
a3ec0bb1 | 3978 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3979 | |
3980 | s = recursively_find_pc_sect_symtab (s, pc); | |
3981 | if (s != NULL) | |
3982 | return s; | |
3983 | } | |
3984 | ||
3985 | return NULL; | |
3986 | } | |
3987 | ||
9291a0cd TT |
3988 | static struct symtab * |
3989 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
77e371c0 | 3990 | struct bound_minimal_symbol msymbol, |
9291a0cd TT |
3991 | CORE_ADDR pc, |
3992 | struct obj_section *section, | |
3993 | int warn_if_readin) | |
3994 | { | |
3995 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3996 | struct symtab *result; |
9291a0cd TT |
3997 | |
3998 | dw2_setup (objfile); | |
3999 | ||
4000 | if (!objfile->psymtabs_addrmap) | |
4001 | return NULL; | |
4002 | ||
4003 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
4004 | if (!data) | |
4005 | return NULL; | |
4006 | ||
4007 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 4008 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4009 | paddress (get_objfile_arch (objfile), pc)); |
4010 | ||
9703b513 TT |
4011 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
4012 | gdb_assert (result != NULL); | |
4013 | return result; | |
9291a0cd TT |
4014 | } |
4015 | ||
9291a0cd | 4016 | static void |
44b13c5a | 4017 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4018 | void *data, int need_fullname) |
9291a0cd TT |
4019 | { |
4020 | int i; | |
24c79950 TT |
4021 | struct cleanup *cleanup; |
4022 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
4023 | NULL, xcalloc, xfree); | |
9291a0cd | 4024 | |
24c79950 | 4025 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 4026 | dw2_setup (objfile); |
ae2de4f8 | 4027 | |
848e3e78 DE |
4028 | /* The rule is CUs specify all the files, including those used by |
4029 | any TU, so there's no need to scan TUs here. | |
4030 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 4031 | |
848e3e78 | 4032 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 | 4033 | { |
8832e7e3 | 4034 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
24c79950 TT |
4035 | |
4036 | if (per_cu->v.quick->symtab) | |
4037 | { | |
4038 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
4039 | INSERT); | |
4040 | ||
4041 | *slot = per_cu->v.quick->file_names; | |
4042 | } | |
4043 | } | |
4044 | ||
848e3e78 | 4045 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4046 | { |
4047 | int j; | |
8832e7e3 | 4048 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 4049 | struct quick_file_names *file_data; |
24c79950 | 4050 | void **slot; |
9291a0cd | 4051 | |
3d7bb9d9 | 4052 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 4053 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
4054 | continue; |
4055 | ||
e4a48d9d | 4056 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4057 | if (file_data == NULL) |
9291a0cd TT |
4058 | continue; |
4059 | ||
24c79950 TT |
4060 | slot = htab_find_slot (visited, file_data, INSERT); |
4061 | if (*slot) | |
4062 | { | |
4063 | /* Already visited. */ | |
4064 | continue; | |
4065 | } | |
4066 | *slot = file_data; | |
4067 | ||
7b9f3c50 | 4068 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4069 | { |
74e2f255 DE |
4070 | const char *this_real_name; |
4071 | ||
4072 | if (need_fullname) | |
4073 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4074 | else | |
4075 | this_real_name = NULL; | |
7b9f3c50 | 4076 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
4077 | } |
4078 | } | |
24c79950 TT |
4079 | |
4080 | do_cleanups (cleanup); | |
9291a0cd TT |
4081 | } |
4082 | ||
4083 | static int | |
4084 | dw2_has_symbols (struct objfile *objfile) | |
4085 | { | |
4086 | return 1; | |
4087 | } | |
4088 | ||
4089 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4090 | { | |
4091 | dw2_has_symbols, | |
4092 | dw2_find_last_source_symtab, | |
4093 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4094 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4095 | dw2_lookup_symbol, |
9291a0cd TT |
4096 | dw2_print_stats, |
4097 | dw2_dump, | |
4098 | dw2_relocate, | |
4099 | dw2_expand_symtabs_for_function, | |
4100 | dw2_expand_all_symtabs, | |
652a8996 | 4101 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4102 | dw2_map_matching_symbols, |
9291a0cd TT |
4103 | dw2_expand_symtabs_matching, |
4104 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
4105 | dw2_map_symbol_filenames |
4106 | }; | |
4107 | ||
4108 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4109 | file will use psymtabs, or 1 if using the GNU index. */ | |
4110 | ||
4111 | int | |
4112 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4113 | { | |
4114 | /* If we're about to read full symbols, don't bother with the | |
4115 | indices. In this case we also don't care if some other debug | |
4116 | format is making psymtabs, because they are all about to be | |
4117 | expanded anyway. */ | |
4118 | if ((objfile->flags & OBJF_READNOW)) | |
4119 | { | |
4120 | int i; | |
4121 | ||
4122 | dwarf2_per_objfile->using_index = 1; | |
4123 | create_all_comp_units (objfile); | |
0e50663e | 4124 | create_all_type_units (objfile); |
7b9f3c50 DE |
4125 | dwarf2_per_objfile->quick_file_names_table = |
4126 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4127 | |
1fd400ff | 4128 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4129 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4130 | { |
8832e7e3 | 4131 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4132 | |
e254ef6a DE |
4133 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4134 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4135 | } |
4136 | ||
4137 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4138 | these functions will be no-ops because we will have expanded | |
4139 | all symtabs. */ | |
4140 | return 1; | |
4141 | } | |
4142 | ||
4143 | if (dwarf2_read_index (objfile)) | |
4144 | return 1; | |
4145 | ||
9291a0cd TT |
4146 | return 0; |
4147 | } | |
4148 | ||
4149 | \f | |
4150 | ||
dce234bc PP |
4151 | /* Build a partial symbol table. */ |
4152 | ||
4153 | void | |
f29dff0a | 4154 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4155 | { |
c9bf0622 TT |
4156 | volatile struct gdb_exception except; |
4157 | ||
f29dff0a | 4158 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4159 | { |
4160 | init_psymbol_list (objfile, 1024); | |
4161 | } | |
4162 | ||
c9bf0622 TT |
4163 | TRY_CATCH (except, RETURN_MASK_ERROR) |
4164 | { | |
4165 | /* This isn't really ideal: all the data we allocate on the | |
4166 | objfile's obstack is still uselessly kept around. However, | |
4167 | freeing it seems unsafe. */ | |
4168 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
4169 | ||
4170 | dwarf2_build_psymtabs_hard (objfile); | |
4171 | discard_cleanups (cleanups); | |
4172 | } | |
4173 | if (except.reason < 0) | |
4174 | exception_print (gdb_stderr, except); | |
c906108c | 4175 | } |
c906108c | 4176 | |
1ce1cefd DE |
4177 | /* Return the total length of the CU described by HEADER. */ |
4178 | ||
4179 | static unsigned int | |
4180 | get_cu_length (const struct comp_unit_head *header) | |
4181 | { | |
4182 | return header->initial_length_size + header->length; | |
4183 | } | |
4184 | ||
45452591 DE |
4185 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
4186 | ||
4187 | static inline int | |
b64f50a1 | 4188 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 4189 | { |
b64f50a1 | 4190 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 4191 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 4192 | |
b64f50a1 | 4193 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
4194 | } |
4195 | ||
3b80fe9b DE |
4196 | /* Find the base address of the compilation unit for range lists and |
4197 | location lists. It will normally be specified by DW_AT_low_pc. | |
4198 | In DWARF-3 draft 4, the base address could be overridden by | |
4199 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4200 | compilation units with discontinuous ranges. */ | |
4201 | ||
4202 | static void | |
4203 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4204 | { | |
4205 | struct attribute *attr; | |
4206 | ||
4207 | cu->base_known = 0; | |
4208 | cu->base_address = 0; | |
4209 | ||
4210 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4211 | if (attr) | |
4212 | { | |
31aa7e4e | 4213 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4214 | cu->base_known = 1; |
4215 | } | |
4216 | else | |
4217 | { | |
4218 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4219 | if (attr) | |
4220 | { | |
31aa7e4e | 4221 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4222 | cu->base_known = 1; |
4223 | } | |
4224 | } | |
4225 | } | |
4226 | ||
93311388 DE |
4227 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4228 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4229 | by the caller. */ | |
107d2387 | 4230 | |
d521ce57 | 4231 | static const gdb_byte * |
107d2387 | 4232 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4233 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4234 | { |
4235 | int signed_addr; | |
891d2f0b | 4236 | unsigned int bytes_read; |
c764a876 DE |
4237 | |
4238 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4239 | cu_header->initial_length_size = bytes_read; | |
4240 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4241 | info_ptr += bytes_read; |
107d2387 AC |
4242 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4243 | info_ptr += 2; | |
b64f50a1 JK |
4244 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4245 | &bytes_read); | |
613e1657 | 4246 | info_ptr += bytes_read; |
107d2387 AC |
4247 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4248 | info_ptr += 1; | |
4249 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4250 | if (signed_addr < 0) | |
8e65ff28 | 4251 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4252 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4253 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4254 | |
107d2387 AC |
4255 | return info_ptr; |
4256 | } | |
4257 | ||
36586728 TT |
4258 | /* Helper function that returns the proper abbrev section for |
4259 | THIS_CU. */ | |
4260 | ||
4261 | static struct dwarf2_section_info * | |
4262 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4263 | { | |
4264 | struct dwarf2_section_info *abbrev; | |
4265 | ||
4266 | if (this_cu->is_dwz) | |
4267 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4268 | else | |
4269 | abbrev = &dwarf2_per_objfile->abbrev; | |
4270 | ||
4271 | return abbrev; | |
4272 | } | |
4273 | ||
9ff913ba DE |
4274 | /* Subroutine of read_and_check_comp_unit_head and |
4275 | read_and_check_type_unit_head to simplify them. | |
4276 | Perform various error checking on the header. */ | |
4277 | ||
4278 | static void | |
4279 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4280 | struct dwarf2_section_info *section, |
4281 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4282 | { |
a32a8923 DE |
4283 | bfd *abfd = get_section_bfd_owner (section); |
4284 | const char *filename = get_section_file_name (section); | |
9ff913ba DE |
4285 | |
4286 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4287 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4288 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4289 | filename); | |
4290 | ||
b64f50a1 | 4291 | if (header->abbrev_offset.sect_off |
36586728 | 4292 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4293 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4294 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4295 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4296 | filename); |
4297 | ||
4298 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4299 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4300 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4301 | > section->size) |
4302 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4303 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4304 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4305 | filename); |
4306 | } | |
4307 | ||
4308 | /* Read in a CU/TU header and perform some basic error checking. | |
4309 | The contents of the header are stored in HEADER. | |
4310 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4311 | |
d521ce57 | 4312 | static const gdb_byte * |
9ff913ba DE |
4313 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4314 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4315 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4316 | const gdb_byte *info_ptr, |
9ff913ba | 4317 | int is_debug_types_section) |
72bf9492 | 4318 | { |
d521ce57 | 4319 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4320 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4321 | |
b64f50a1 | 4322 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4323 | |
72bf9492 DJ |
4324 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4325 | ||
460c1c54 CC |
4326 | /* If we're reading a type unit, skip over the signature and |
4327 | type_offset fields. */ | |
b0df02fd | 4328 | if (is_debug_types_section) |
460c1c54 CC |
4329 | info_ptr += 8 /*signature*/ + header->offset_size; |
4330 | ||
b64f50a1 | 4331 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4332 | |
4bdcc0c1 | 4333 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4334 | |
4335 | return info_ptr; | |
4336 | } | |
4337 | ||
348e048f DE |
4338 | /* Read in the types comp unit header information from .debug_types entry at |
4339 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4340 | ||
d521ce57 | 4341 | static const gdb_byte * |
9ff913ba DE |
4342 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4343 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4344 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4345 | const gdb_byte *info_ptr, |
dee91e82 DE |
4346 | ULONGEST *signature, |
4347 | cu_offset *type_offset_in_tu) | |
348e048f | 4348 | { |
d521ce57 | 4349 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4350 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4351 | |
b64f50a1 | 4352 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4353 | |
9ff913ba | 4354 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4355 | |
9ff913ba DE |
4356 | /* If we're reading a type unit, skip over the signature and |
4357 | type_offset fields. */ | |
4358 | if (signature != NULL) | |
4359 | *signature = read_8_bytes (abfd, info_ptr); | |
4360 | info_ptr += 8; | |
dee91e82 DE |
4361 | if (type_offset_in_tu != NULL) |
4362 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4363 | header->offset_size); | |
9ff913ba DE |
4364 | info_ptr += header->offset_size; |
4365 | ||
b64f50a1 | 4366 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4367 | |
4bdcc0c1 | 4368 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4369 | |
4370 | return info_ptr; | |
348e048f DE |
4371 | } |
4372 | ||
f4dc4d17 DE |
4373 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4374 | ||
4375 | static sect_offset | |
4376 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4377 | sect_offset offset) | |
4378 | { | |
a32a8923 | 4379 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4380 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4381 | unsigned int length, initial_length_size, offset_size; |
4382 | sect_offset abbrev_offset; | |
4383 | ||
4384 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4385 | info_ptr = section->buffer + offset.sect_off; | |
4386 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4387 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4388 | info_ptr += initial_length_size + 2 /*version*/; | |
4389 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4390 | return abbrev_offset; | |
4391 | } | |
4392 | ||
aaa75496 JB |
4393 | /* Allocate a new partial symtab for file named NAME and mark this new |
4394 | partial symtab as being an include of PST. */ | |
4395 | ||
4396 | static void | |
d521ce57 | 4397 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4398 | struct objfile *objfile) |
4399 | { | |
4400 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4401 | ||
fbd9ab74 JK |
4402 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4403 | { | |
4404 | /* It shares objfile->objfile_obstack. */ | |
4405 | subpst->dirname = pst->dirname; | |
4406 | } | |
4407 | ||
aaa75496 JB |
4408 | subpst->section_offsets = pst->section_offsets; |
4409 | subpst->textlow = 0; | |
4410 | subpst->texthigh = 0; | |
4411 | ||
4412 | subpst->dependencies = (struct partial_symtab **) | |
4413 | obstack_alloc (&objfile->objfile_obstack, | |
4414 | sizeof (struct partial_symtab *)); | |
4415 | subpst->dependencies[0] = pst; | |
4416 | subpst->number_of_dependencies = 1; | |
4417 | ||
4418 | subpst->globals_offset = 0; | |
4419 | subpst->n_global_syms = 0; | |
4420 | subpst->statics_offset = 0; | |
4421 | subpst->n_static_syms = 0; | |
4422 | subpst->symtab = NULL; | |
4423 | subpst->read_symtab = pst->read_symtab; | |
4424 | subpst->readin = 0; | |
4425 | ||
4426 | /* No private part is necessary for include psymtabs. This property | |
4427 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4428 | the regular ones. */ |
58a9656e | 4429 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4430 | } |
4431 | ||
4432 | /* Read the Line Number Program data and extract the list of files | |
4433 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4434 | partial symtab for each of these included files. */ |
aaa75496 JB |
4435 | |
4436 | static void | |
4437 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4438 | struct die_info *die, |
4439 | struct partial_symtab *pst) | |
aaa75496 | 4440 | { |
d85a05f0 DJ |
4441 | struct line_header *lh = NULL; |
4442 | struct attribute *attr; | |
aaa75496 | 4443 | |
d85a05f0 DJ |
4444 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4445 | if (attr) | |
3019eac3 | 4446 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4447 | if (lh == NULL) |
4448 | return; /* No linetable, so no includes. */ | |
4449 | ||
c6da4cef | 4450 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
c3b7b696 | 4451 | dwarf_decode_lines (lh, pst->dirname, cu, pst, pst->textlow); |
aaa75496 JB |
4452 | |
4453 | free_line_header (lh); | |
4454 | } | |
4455 | ||
348e048f | 4456 | static hashval_t |
52dc124a | 4457 | hash_signatured_type (const void *item) |
348e048f | 4458 | { |
52dc124a | 4459 | const struct signatured_type *sig_type = item; |
9a619af0 | 4460 | |
348e048f | 4461 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4462 | return sig_type->signature; |
348e048f DE |
4463 | } |
4464 | ||
4465 | static int | |
52dc124a | 4466 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4467 | { |
4468 | const struct signatured_type *lhs = item_lhs; | |
4469 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4470 | |
348e048f DE |
4471 | return lhs->signature == rhs->signature; |
4472 | } | |
4473 | ||
1fd400ff TT |
4474 | /* Allocate a hash table for signatured types. */ |
4475 | ||
4476 | static htab_t | |
673bfd45 | 4477 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4478 | { |
4479 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4480 | hash_signatured_type, |
4481 | eq_signatured_type, | |
1fd400ff TT |
4482 | NULL, |
4483 | &objfile->objfile_obstack, | |
4484 | hashtab_obstack_allocate, | |
4485 | dummy_obstack_deallocate); | |
4486 | } | |
4487 | ||
d467dd73 | 4488 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4489 | |
4490 | static int | |
d467dd73 | 4491 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4492 | { |
4493 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4494 | struct signatured_type ***datap = datum; |
1fd400ff | 4495 | |
b4dd5633 | 4496 | **datap = sigt; |
1fd400ff TT |
4497 | ++*datap; |
4498 | ||
4499 | return 1; | |
4500 | } | |
4501 | ||
c88ee1f0 DE |
4502 | /* Create the hash table of all entries in the .debug_types |
4503 | (or .debug_types.dwo) section(s). | |
4504 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4505 | otherwise it is NULL. | |
4506 | ||
4507 | The result is a pointer to the hash table or NULL if there are no types. | |
4508 | ||
4509 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4510 | |
3019eac3 DE |
4511 | static htab_t |
4512 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4513 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4514 | { |
3019eac3 | 4515 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4516 | htab_t types_htab = NULL; |
8b70b953 TT |
4517 | int ix; |
4518 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4519 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4520 | |
3019eac3 DE |
4521 | if (VEC_empty (dwarf2_section_info_def, types)) |
4522 | return NULL; | |
348e048f | 4523 | |
4bdcc0c1 DE |
4524 | abbrev_section = (dwo_file != NULL |
4525 | ? &dwo_file->sections.abbrev | |
4526 | : &dwarf2_per_objfile->abbrev); | |
4527 | ||
09406207 DE |
4528 | if (dwarf2_read_debug) |
4529 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4530 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4531 | get_section_file_name (abbrev_section)); |
09406207 | 4532 | |
8b70b953 | 4533 | for (ix = 0; |
3019eac3 | 4534 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4535 | ++ix) |
4536 | { | |
3019eac3 | 4537 | bfd *abfd; |
d521ce57 | 4538 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4539 | |
8b70b953 TT |
4540 | dwarf2_read_section (objfile, section); |
4541 | info_ptr = section->buffer; | |
348e048f | 4542 | |
8b70b953 TT |
4543 | if (info_ptr == NULL) |
4544 | continue; | |
348e048f | 4545 | |
3019eac3 | 4546 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4547 | not present, in which case the bfd is unknown. */ |
4548 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4549 | |
dee91e82 DE |
4550 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4551 | because we don't need to read any dies: the signature is in the | |
4552 | header. */ | |
8b70b953 TT |
4553 | |
4554 | end_ptr = info_ptr + section->size; | |
4555 | while (info_ptr < end_ptr) | |
4556 | { | |
b64f50a1 | 4557 | sect_offset offset; |
3019eac3 | 4558 | cu_offset type_offset_in_tu; |
8b70b953 | 4559 | ULONGEST signature; |
52dc124a | 4560 | struct signatured_type *sig_type; |
3019eac3 | 4561 | struct dwo_unit *dwo_tu; |
8b70b953 | 4562 | void **slot; |
d521ce57 | 4563 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4564 | struct comp_unit_head header; |
dee91e82 | 4565 | unsigned int length; |
348e048f | 4566 | |
b64f50a1 | 4567 | offset.sect_off = ptr - section->buffer; |
348e048f | 4568 | |
8b70b953 | 4569 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4570 | table, but we don't need anything else just yet. */ |
348e048f | 4571 | |
4bdcc0c1 DE |
4572 | ptr = read_and_check_type_unit_head (&header, section, |
4573 | abbrev_section, ptr, | |
3019eac3 | 4574 | &signature, &type_offset_in_tu); |
6caca83c | 4575 | |
1ce1cefd | 4576 | length = get_cu_length (&header); |
dee91e82 | 4577 | |
6caca83c | 4578 | /* Skip dummy type units. */ |
dee91e82 DE |
4579 | if (ptr >= info_ptr + length |
4580 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4581 | { |
1ce1cefd | 4582 | info_ptr += length; |
6caca83c CC |
4583 | continue; |
4584 | } | |
8b70b953 | 4585 | |
0349ea22 DE |
4586 | if (types_htab == NULL) |
4587 | { | |
4588 | if (dwo_file) | |
4589 | types_htab = allocate_dwo_unit_table (objfile); | |
4590 | else | |
4591 | types_htab = allocate_signatured_type_table (objfile); | |
4592 | } | |
4593 | ||
3019eac3 DE |
4594 | if (dwo_file) |
4595 | { | |
4596 | sig_type = NULL; | |
4597 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4598 | struct dwo_unit); | |
4599 | dwo_tu->dwo_file = dwo_file; | |
4600 | dwo_tu->signature = signature; | |
4601 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4602 | dwo_tu->section = section; |
3019eac3 DE |
4603 | dwo_tu->offset = offset; |
4604 | dwo_tu->length = length; | |
4605 | } | |
4606 | else | |
4607 | { | |
4608 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4609 | The real type_offset is in the DWO file. */ | |
4610 | dwo_tu = NULL; | |
4611 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4612 | struct signatured_type); | |
4613 | sig_type->signature = signature; | |
4614 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4615 | sig_type->per_cu.objfile = objfile; | |
4616 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4617 | sig_type->per_cu.section = section; |
3019eac3 DE |
4618 | sig_type->per_cu.offset = offset; |
4619 | sig_type->per_cu.length = length; | |
4620 | } | |
8b70b953 | 4621 | |
3019eac3 DE |
4622 | slot = htab_find_slot (types_htab, |
4623 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4624 | INSERT); | |
8b70b953 TT |
4625 | gdb_assert (slot != NULL); |
4626 | if (*slot != NULL) | |
4627 | { | |
3019eac3 DE |
4628 | sect_offset dup_offset; |
4629 | ||
4630 | if (dwo_file) | |
4631 | { | |
4632 | const struct dwo_unit *dup_tu = *slot; | |
4633 | ||
4634 | dup_offset = dup_tu->offset; | |
4635 | } | |
4636 | else | |
4637 | { | |
4638 | const struct signatured_type *dup_tu = *slot; | |
4639 | ||
4640 | dup_offset = dup_tu->per_cu.offset; | |
4641 | } | |
b3c8eb43 | 4642 | |
8b70b953 | 4643 | complaint (&symfile_complaints, |
c88ee1f0 | 4644 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4645 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4646 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4647 | hex_string (signature)); |
8b70b953 | 4648 | } |
3019eac3 | 4649 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4650 | |
73be47f5 | 4651 | if (dwarf2_read_debug > 1) |
4031ecc5 | 4652 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4653 | offset.sect_off, |
4031ecc5 | 4654 | hex_string (signature)); |
348e048f | 4655 | |
dee91e82 | 4656 | info_ptr += length; |
8b70b953 | 4657 | } |
348e048f DE |
4658 | } |
4659 | ||
3019eac3 DE |
4660 | return types_htab; |
4661 | } | |
4662 | ||
4663 | /* Create the hash table of all entries in the .debug_types section, | |
4664 | and initialize all_type_units. | |
4665 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4666 | otherwise non-zero. */ | |
4667 | ||
4668 | static int | |
4669 | create_all_type_units (struct objfile *objfile) | |
4670 | { | |
4671 | htab_t types_htab; | |
b4dd5633 | 4672 | struct signatured_type **iter; |
3019eac3 DE |
4673 | |
4674 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4675 | if (types_htab == NULL) | |
4676 | { | |
4677 | dwarf2_per_objfile->signatured_types = NULL; | |
4678 | return 0; | |
4679 | } | |
4680 | ||
348e048f DE |
4681 | dwarf2_per_objfile->signatured_types = types_htab; |
4682 | ||
6aa5f3a6 DE |
4683 | dwarf2_per_objfile->n_type_units |
4684 | = dwarf2_per_objfile->n_allocated_type_units | |
4685 | = htab_elements (types_htab); | |
d467dd73 | 4686 | dwarf2_per_objfile->all_type_units |
a2ce51a0 DE |
4687 | = xmalloc (dwarf2_per_objfile->n_type_units |
4688 | * sizeof (struct signatured_type *)); | |
d467dd73 DE |
4689 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4690 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4691 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4692 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4693 | |
348e048f DE |
4694 | return 1; |
4695 | } | |
4696 | ||
6aa5f3a6 DE |
4697 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
4698 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
4699 | Otherwise we find one. */ | |
4700 | ||
4701 | static struct signatured_type * | |
4702 | add_type_unit (ULONGEST sig, void **slot) | |
4703 | { | |
4704 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4705 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4706 | struct signatured_type *sig_type; | |
4707 | ||
4708 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
4709 | ++n_type_units; | |
4710 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
4711 | { | |
4712 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
4713 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
4714 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
4715 | dwarf2_per_objfile->all_type_units | |
4716 | = xrealloc (dwarf2_per_objfile->all_type_units, | |
4717 | dwarf2_per_objfile->n_allocated_type_units | |
4718 | * sizeof (struct signatured_type *)); | |
4719 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
4720 | } | |
4721 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4722 | ||
4723 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4724 | struct signatured_type); | |
4725 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4726 | sig_type->signature = sig; | |
4727 | sig_type->per_cu.is_debug_types = 1; | |
4728 | if (dwarf2_per_objfile->using_index) | |
4729 | { | |
4730 | sig_type->per_cu.v.quick = | |
4731 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4732 | struct dwarf2_per_cu_quick_data); | |
4733 | } | |
4734 | ||
4735 | if (slot == NULL) | |
4736 | { | |
4737 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4738 | sig_type, INSERT); | |
4739 | } | |
4740 | gdb_assert (*slot == NULL); | |
4741 | *slot = sig_type; | |
4742 | /* The rest of sig_type must be filled in by the caller. */ | |
4743 | return sig_type; | |
4744 | } | |
4745 | ||
a2ce51a0 DE |
4746 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4747 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4748 | ||
4749 | static void | |
4750 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4751 | struct signatured_type *sig_entry, | |
4752 | struct dwo_unit *dwo_entry) | |
4753 | { | |
7ee85ab1 | 4754 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4755 | gdb_assert (! sig_entry->per_cu.queued); |
4756 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
4757 | if (dwarf2_per_objfile->using_index) |
4758 | { | |
4759 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
4760 | gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL); | |
4761 | } | |
4762 | else | |
4763 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 DE |
4764 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
4765 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4766 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4767 | gdb_assert (sig_entry->dwo_unit == NULL); |
4768 | ||
4769 | sig_entry->per_cu.section = dwo_entry->section; | |
4770 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4771 | sig_entry->per_cu.length = dwo_entry->length; | |
4772 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4773 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4774 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4775 | sig_entry->dwo_unit = dwo_entry; | |
4776 | } | |
4777 | ||
4778 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4779 | If we haven't read the TU yet, create the signatured_type data structure |
4780 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4781 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4782 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4783 | containing that CU. Otherwise we could end up reading several other DWO | |
4784 | files (due to comdat folding) to process the transitive closure of all the | |
4785 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4786 | type signature that it needs. | |
a2ce51a0 DE |
4787 | We only do this for .gdb_index because in the psymtab case we already have |
4788 | to read all the DWOs to build the type unit groups. */ | |
4789 | ||
4790 | static struct signatured_type * | |
4791 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4792 | { | |
4793 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4794 | struct dwo_file *dwo_file; | |
4795 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4796 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4797 | void **slot; |
a2ce51a0 DE |
4798 | |
4799 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4800 | ||
6aa5f3a6 DE |
4801 | /* If TU skeletons have been removed then we may not have read in any |
4802 | TUs yet. */ | |
4803 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4804 | { | |
4805 | dwarf2_per_objfile->signatured_types | |
4806 | = allocate_signatured_type_table (objfile); | |
4807 | } | |
a2ce51a0 DE |
4808 | |
4809 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
4810 | Use the global signatured_types array to do our own comdat-folding |
4811 | of types. If this is the first time we're reading this TU, and | |
4812 | the TU has an entry in .gdb_index, replace the recorded data from | |
4813 | .gdb_index with this TU. */ | |
a2ce51a0 | 4814 | |
a2ce51a0 | 4815 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
4816 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
4817 | &find_sig_entry, INSERT); | |
4818 | sig_entry = *slot; | |
7ee85ab1 DE |
4819 | |
4820 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
4821 | read. Don't reassign the global entry to point to this DWO if that's |
4822 | the case. Also note that if the TU is already being read, it may not | |
4823 | have come from a DWO, the program may be a mix of Fission-compiled | |
4824 | code and non-Fission-compiled code. */ | |
4825 | ||
4826 | /* Have we already tried to read this TU? | |
4827 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
4828 | needn't exist in the global table yet). */ | |
4829 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
4830 | return sig_entry; |
4831 | ||
6aa5f3a6 DE |
4832 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
4833 | dwo_unit of the TU itself. */ | |
4834 | dwo_file = cu->dwo_unit->dwo_file; | |
4835 | ||
a2ce51a0 DE |
4836 | /* Ok, this is the first time we're reading this TU. */ |
4837 | if (dwo_file->tus == NULL) | |
4838 | return NULL; | |
4839 | find_dwo_entry.signature = sig; | |
4840 | dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry); | |
4841 | if (dwo_entry == NULL) | |
4842 | return NULL; | |
4843 | ||
6aa5f3a6 DE |
4844 | /* If the global table doesn't have an entry for this TU, add one. */ |
4845 | if (sig_entry == NULL) | |
4846 | sig_entry = add_type_unit (sig, slot); | |
4847 | ||
a2ce51a0 | 4848 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 4849 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4850 | return sig_entry; |
4851 | } | |
4852 | ||
a2ce51a0 DE |
4853 | /* Subroutine of lookup_signatured_type. |
4854 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
4855 | then try the DWP file. If the TU stub (skeleton) has been removed then |
4856 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
4857 | |
4858 | static struct signatured_type * | |
4859 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4860 | { | |
4861 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4862 | struct dwp_file *dwp_file = get_dwp_file (); | |
4863 | struct dwo_unit *dwo_entry; | |
4864 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 4865 | void **slot; |
a2ce51a0 DE |
4866 | |
4867 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4868 | gdb_assert (dwp_file != NULL); | |
4869 | ||
6aa5f3a6 DE |
4870 | /* If TU skeletons have been removed then we may not have read in any |
4871 | TUs yet. */ | |
4872 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 4873 | { |
6aa5f3a6 DE |
4874 | dwarf2_per_objfile->signatured_types |
4875 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
4876 | } |
4877 | ||
6aa5f3a6 DE |
4878 | find_sig_entry.signature = sig; |
4879 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4880 | &find_sig_entry, INSERT); | |
4881 | sig_entry = *slot; | |
4882 | ||
4883 | /* Have we already tried to read this TU? | |
4884 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
4885 | needn't exist in the global table yet). */ | |
4886 | if (sig_entry != NULL) | |
4887 | return sig_entry; | |
4888 | ||
a2ce51a0 DE |
4889 | if (dwp_file->tus == NULL) |
4890 | return NULL; | |
57d63ce2 DE |
4891 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
4892 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
4893 | if (dwo_entry == NULL) |
4894 | return NULL; | |
4895 | ||
6aa5f3a6 | 4896 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
4897 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
4898 | ||
a2ce51a0 DE |
4899 | return sig_entry; |
4900 | } | |
4901 | ||
380bca97 | 4902 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
4903 | Returns NULL if signature SIG is not present in the table. |
4904 | It is up to the caller to complain about this. */ | |
348e048f DE |
4905 | |
4906 | static struct signatured_type * | |
a2ce51a0 | 4907 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 4908 | { |
a2ce51a0 DE |
4909 | if (cu->dwo_unit |
4910 | && dwarf2_per_objfile->using_index) | |
4911 | { | |
4912 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
4913 | These cases require special processing. */ | |
4914 | if (get_dwp_file () == NULL) | |
4915 | return lookup_dwo_signatured_type (cu, sig); | |
4916 | else | |
4917 | return lookup_dwp_signatured_type (cu, sig); | |
4918 | } | |
4919 | else | |
4920 | { | |
4921 | struct signatured_type find_entry, *entry; | |
348e048f | 4922 | |
a2ce51a0 DE |
4923 | if (dwarf2_per_objfile->signatured_types == NULL) |
4924 | return NULL; | |
4925 | find_entry.signature = sig; | |
4926 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4927 | return entry; | |
4928 | } | |
348e048f | 4929 | } |
42e7ad6c DE |
4930 | \f |
4931 | /* Low level DIE reading support. */ | |
348e048f | 4932 | |
d85a05f0 DJ |
4933 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4934 | ||
4935 | static void | |
4936 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4937 | struct dwarf2_cu *cu, |
3019eac3 DE |
4938 | struct dwarf2_section_info *section, |
4939 | struct dwo_file *dwo_file) | |
d85a05f0 | 4940 | { |
fceca515 | 4941 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 4942 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 4943 | reader->cu = cu; |
3019eac3 | 4944 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4945 | reader->die_section = section; |
4946 | reader->buffer = section->buffer; | |
f664829e | 4947 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 4948 | reader->comp_dir = NULL; |
d85a05f0 DJ |
4949 | } |
4950 | ||
b0c7bfa9 DE |
4951 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4952 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
4953 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
4954 | already. | |
4955 | ||
4956 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
4957 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
4958 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
4959 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
4960 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
4961 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
4962 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
4963 | are filled in with the info of the DIE from the DWO file. | |
4964 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
4965 | provided an abbrev table to use. | |
4966 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
4967 | ||
4968 | static int | |
4969 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
4970 | struct dwo_unit *dwo_unit, | |
4971 | int abbrev_table_provided, | |
4972 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 4973 | const char *stub_comp_dir, |
b0c7bfa9 | 4974 | struct die_reader_specs *result_reader, |
d521ce57 | 4975 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
4976 | struct die_info **result_comp_unit_die, |
4977 | int *result_has_children) | |
4978 | { | |
4979 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4980 | struct dwarf2_cu *cu = this_cu->cu; | |
4981 | struct dwarf2_section_info *section; | |
4982 | bfd *abfd; | |
d521ce57 | 4983 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
4984 | ULONGEST signature; /* Or dwo_id. */ |
4985 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
4986 | int i,num_extra_attrs; | |
4987 | struct dwarf2_section_info *dwo_abbrev_section; | |
4988 | struct attribute *attr; | |
4989 | struct die_info *comp_unit_die; | |
4990 | ||
b0aeadb3 DE |
4991 | /* At most one of these may be provided. */ |
4992 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 4993 | |
b0c7bfa9 DE |
4994 | /* These attributes aren't processed until later: |
4995 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
4996 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
4997 | referenced later. However, these attributes are found in the stub | |
4998 | which we won't have later. In order to not impose this complication | |
4999 | on the rest of the code, we read them here and copy them to the | |
5000 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5001 | |
5002 | stmt_list = NULL; | |
5003 | low_pc = NULL; | |
5004 | high_pc = NULL; | |
5005 | ranges = NULL; | |
5006 | comp_dir = NULL; | |
5007 | ||
5008 | if (stub_comp_unit_die != NULL) | |
5009 | { | |
5010 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5011 | DWO file. */ | |
5012 | if (! this_cu->is_debug_types) | |
5013 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5014 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5015 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5016 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5017 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5018 | ||
5019 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5020 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5021 | cu->addr_base = 0; | |
5022 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5023 | if (attr) | |
5024 | cu->addr_base = DW_UNSND (attr); | |
5025 | ||
5026 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5027 | We need the value before we can process DW_AT_ranges. */ | |
5028 | cu->ranges_base = 0; | |
5029 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5030 | if (attr) | |
5031 | cu->ranges_base = DW_UNSND (attr); | |
5032 | } | |
a2ce51a0 DE |
5033 | else if (stub_comp_dir != NULL) |
5034 | { | |
5035 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
5036 | comp_dir = (struct attribute *) | |
5037 | obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir)); | |
5038 | comp_dir->name = DW_AT_comp_dir; | |
5039 | comp_dir->form = DW_FORM_string; | |
5040 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5041 | DW_STRING (comp_dir) = stub_comp_dir; | |
5042 | } | |
b0c7bfa9 DE |
5043 | |
5044 | /* Set up for reading the DWO CU/TU. */ | |
5045 | cu->dwo_unit = dwo_unit; | |
5046 | section = dwo_unit->section; | |
5047 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5048 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
5049 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
5050 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
5051 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5052 | ||
5053 | if (this_cu->is_debug_types) | |
5054 | { | |
5055 | ULONGEST header_signature; | |
5056 | cu_offset type_offset_in_tu; | |
5057 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
5058 | ||
5059 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
5060 | dwo_abbrev_section, | |
5061 | info_ptr, | |
5062 | &header_signature, | |
5063 | &type_offset_in_tu); | |
a2ce51a0 DE |
5064 | /* This is not an assert because it can be caused by bad debug info. */ |
5065 | if (sig_type->signature != header_signature) | |
5066 | { | |
5067 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5068 | " TU at offset 0x%x [in module %s]"), | |
5069 | hex_string (sig_type->signature), | |
5070 | hex_string (header_signature), | |
5071 | dwo_unit->offset.sect_off, | |
5072 | bfd_get_filename (abfd)); | |
5073 | } | |
b0c7bfa9 DE |
5074 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
5075 | /* For DWOs coming from DWP files, we don't know the CU length | |
5076 | nor the type's offset in the TU until now. */ | |
5077 | dwo_unit->length = get_cu_length (&cu->header); | |
5078 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
5079 | ||
5080 | /* Establish the type offset that can be used to lookup the type. | |
5081 | For DWO files, we don't know it until now. */ | |
5082 | sig_type->type_offset_in_section.sect_off = | |
5083 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
5084 | } | |
5085 | else | |
5086 | { | |
5087 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5088 | dwo_abbrev_section, | |
5089 | info_ptr, 0); | |
5090 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
5091 | /* For DWOs coming from DWP files, we don't know the CU length | |
5092 | until now. */ | |
5093 | dwo_unit->length = get_cu_length (&cu->header); | |
5094 | } | |
5095 | ||
02142a6c DE |
5096 | /* Replace the CU's original abbrev table with the DWO's. |
5097 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5098 | if (abbrev_table_provided) |
5099 | { | |
5100 | /* Don't free the provided abbrev table, the caller of | |
5101 | init_cutu_and_read_dies owns it. */ | |
5102 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5103 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5104 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5105 | } | |
5106 | else | |
5107 | { | |
5108 | dwarf2_free_abbrev_table (cu); | |
5109 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5110 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5111 | } |
5112 | ||
5113 | /* Read in the die, but leave space to copy over the attributes | |
5114 | from the stub. This has the benefit of simplifying the rest of | |
5115 | the code - all the work to maintain the illusion of a single | |
5116 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5117 | num_extra_attrs = ((stmt_list != NULL) | |
5118 | + (low_pc != NULL) | |
5119 | + (high_pc != NULL) | |
5120 | + (ranges != NULL) | |
5121 | + (comp_dir != NULL)); | |
5122 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5123 | result_has_children, num_extra_attrs); | |
5124 | ||
5125 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5126 | comp_unit_die = *result_comp_unit_die; | |
5127 | i = comp_unit_die->num_attrs; | |
5128 | if (stmt_list != NULL) | |
5129 | comp_unit_die->attrs[i++] = *stmt_list; | |
5130 | if (low_pc != NULL) | |
5131 | comp_unit_die->attrs[i++] = *low_pc; | |
5132 | if (high_pc != NULL) | |
5133 | comp_unit_die->attrs[i++] = *high_pc; | |
5134 | if (ranges != NULL) | |
5135 | comp_unit_die->attrs[i++] = *ranges; | |
5136 | if (comp_dir != NULL) | |
5137 | comp_unit_die->attrs[i++] = *comp_dir; | |
5138 | comp_unit_die->num_attrs += num_extra_attrs; | |
5139 | ||
bf6af496 DE |
5140 | if (dwarf2_die_debug) |
5141 | { | |
5142 | fprintf_unfiltered (gdb_stdlog, | |
5143 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5144 | get_section_name (section), |
bf6af496 DE |
5145 | (unsigned) (begin_info_ptr - section->buffer), |
5146 | bfd_get_filename (abfd)); | |
5147 | dump_die (comp_unit_die, dwarf2_die_debug); | |
5148 | } | |
5149 | ||
a2ce51a0 DE |
5150 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5151 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5152 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5153 | to get it via circuitous means. Blech. */ | |
5154 | if (comp_dir != NULL) | |
5155 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5156 | ||
b0c7bfa9 DE |
5157 | /* Skip dummy compilation units. */ |
5158 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5159 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5160 | return 0; | |
5161 | ||
5162 | *result_info_ptr = info_ptr; | |
5163 | return 1; | |
5164 | } | |
5165 | ||
5166 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5167 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5168 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5169 | |
5170 | static struct dwo_unit * | |
5171 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5172 | struct die_info *comp_unit_die) | |
5173 | { | |
5174 | struct dwarf2_cu *cu = this_cu->cu; | |
5175 | struct attribute *attr; | |
5176 | ULONGEST signature; | |
5177 | struct dwo_unit *dwo_unit; | |
5178 | const char *comp_dir, *dwo_name; | |
5179 | ||
a2ce51a0 DE |
5180 | gdb_assert (cu != NULL); |
5181 | ||
b0c7bfa9 DE |
5182 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
5183 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
5184 | gdb_assert (attr != NULL); | |
5185 | dwo_name = DW_STRING (attr); | |
5186 | comp_dir = NULL; | |
5187 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5188 | if (attr) | |
5189 | comp_dir = DW_STRING (attr); | |
5190 | ||
5191 | if (this_cu->is_debug_types) | |
5192 | { | |
5193 | struct signatured_type *sig_type; | |
5194 | ||
5195 | /* Since this_cu is the first member of struct signatured_type, | |
5196 | we can go from a pointer to one to a pointer to the other. */ | |
5197 | sig_type = (struct signatured_type *) this_cu; | |
5198 | signature = sig_type->signature; | |
5199 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5200 | } | |
5201 | else | |
5202 | { | |
5203 | struct attribute *attr; | |
5204 | ||
5205 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5206 | if (! attr) | |
5207 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5208 | " [in module %s]"), | |
4262abfb | 5209 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5210 | signature = DW_UNSND (attr); |
5211 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5212 | signature); | |
5213 | } | |
5214 | ||
b0c7bfa9 DE |
5215 | return dwo_unit; |
5216 | } | |
5217 | ||
a2ce51a0 | 5218 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5219 | See it for a description of the parameters. |
5220 | Read a TU directly from a DWO file, bypassing the stub. | |
5221 | ||
5222 | Note: This function could be a little bit simpler if we shared cleanups | |
5223 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5224 | to do, so we keep this function self-contained. Or we could move this | |
5225 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5226 | |
5227 | static void | |
6aa5f3a6 DE |
5228 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5229 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5230 | die_reader_func_ftype *die_reader_func, |
5231 | void *data) | |
5232 | { | |
5233 | struct dwarf2_cu *cu; | |
5234 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5235 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5236 | struct die_reader_specs reader; |
5237 | const gdb_byte *info_ptr; | |
5238 | struct die_info *comp_unit_die; | |
5239 | int has_children; | |
5240 | ||
5241 | /* Verify we can do the following downcast, and that we have the | |
5242 | data we need. */ | |
5243 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5244 | sig_type = (struct signatured_type *) this_cu; | |
5245 | gdb_assert (sig_type->dwo_unit != NULL); | |
5246 | ||
5247 | cleanups = make_cleanup (null_cleanup, NULL); | |
5248 | ||
6aa5f3a6 DE |
5249 | if (use_existing_cu && this_cu->cu != NULL) |
5250 | { | |
5251 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5252 | cu = this_cu->cu; | |
5253 | /* There's no need to do the rereading_dwo_cu handling that | |
5254 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5255 | } | |
5256 | else | |
5257 | { | |
5258 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5259 | gdb_assert (this_cu->cu == NULL); | |
5260 | cu = xmalloc (sizeof (*cu)); | |
5261 | init_one_comp_unit (cu, this_cu); | |
5262 | /* If an error occurs while loading, release our storage. */ | |
5263 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5264 | } | |
5265 | ||
5266 | /* A future optimization, if needed, would be to use an existing | |
5267 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5268 | could share abbrev tables. */ | |
a2ce51a0 DE |
5269 | |
5270 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5271 | 0 /* abbrev_table_provided */, | |
5272 | NULL /* stub_comp_unit_die */, | |
5273 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5274 | &reader, &info_ptr, | |
5275 | &comp_unit_die, &has_children) == 0) | |
5276 | { | |
5277 | /* Dummy die. */ | |
5278 | do_cleanups (cleanups); | |
5279 | return; | |
5280 | } | |
5281 | ||
5282 | /* All the "real" work is done here. */ | |
5283 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5284 | ||
6aa5f3a6 | 5285 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5286 | but the alternative is making the latter more complex. |
5287 | This function is only for the special case of using DWO files directly: | |
5288 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5289 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5290 | { |
6aa5f3a6 DE |
5291 | if (keep) |
5292 | { | |
5293 | /* We've successfully allocated this compilation unit. Let our | |
5294 | caller clean it up when finished with it. */ | |
5295 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5296 | |
6aa5f3a6 DE |
5297 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5298 | So we have to manually free the abbrev table. */ | |
5299 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5300 | |
6aa5f3a6 DE |
5301 | /* Link this CU into read_in_chain. */ |
5302 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5303 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5304 | } | |
5305 | else | |
5306 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5307 | } |
a2ce51a0 DE |
5308 | |
5309 | do_cleanups (cleanups); | |
5310 | } | |
5311 | ||
fd820528 | 5312 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5313 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5314 | |
f4dc4d17 DE |
5315 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5316 | Otherwise the table specified in the comp unit header is read in and used. | |
5317 | This is an optimization for when we already have the abbrev table. | |
5318 | ||
dee91e82 DE |
5319 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5320 | Otherwise, a new CU is allocated with xmalloc. | |
5321 | ||
5322 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5323 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5324 | ||
5325 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5326 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5327 | |
70221824 | 5328 | static void |
fd820528 | 5329 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5330 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5331 | int use_existing_cu, int keep, |
5332 | die_reader_func_ftype *die_reader_func, | |
5333 | void *data) | |
c906108c | 5334 | { |
dee91e82 | 5335 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5336 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5337 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5338 | struct dwarf2_cu *cu; |
d521ce57 | 5339 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5340 | struct die_reader_specs reader; |
d85a05f0 | 5341 | struct die_info *comp_unit_die; |
dee91e82 | 5342 | int has_children; |
d85a05f0 | 5343 | struct attribute *attr; |
365156ad | 5344 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5345 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5346 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5347 | /* Non-zero if CU currently points to a DWO file and we need to |
5348 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5349 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5350 | int rereading_dwo_cu = 0; |
c906108c | 5351 | |
09406207 DE |
5352 | if (dwarf2_die_debug) |
5353 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5354 | this_cu->is_debug_types ? "type" : "comp", | |
5355 | this_cu->offset.sect_off); | |
5356 | ||
dee91e82 DE |
5357 | if (use_existing_cu) |
5358 | gdb_assert (keep); | |
23745b47 | 5359 | |
a2ce51a0 DE |
5360 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5361 | file (instead of going through the stub), short-circuit all of this. */ | |
5362 | if (this_cu->reading_dwo_directly) | |
5363 | { | |
5364 | /* Narrow down the scope of possibilities to have to understand. */ | |
5365 | gdb_assert (this_cu->is_debug_types); | |
5366 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5367 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5368 | die_reader_func, data); | |
a2ce51a0 DE |
5369 | return; |
5370 | } | |
5371 | ||
dee91e82 DE |
5372 | cleanups = make_cleanup (null_cleanup, NULL); |
5373 | ||
5374 | /* This is cheap if the section is already read in. */ | |
5375 | dwarf2_read_section (objfile, section); | |
5376 | ||
5377 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5378 | |
5379 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5380 | |
5381 | if (use_existing_cu && this_cu->cu != NULL) | |
5382 | { | |
5383 | cu = this_cu->cu; | |
42e7ad6c DE |
5384 | /* If this CU is from a DWO file we need to start over, we need to |
5385 | refetch the attributes from the skeleton CU. | |
5386 | This could be optimized by retrieving those attributes from when we | |
5387 | were here the first time: the previous comp_unit_die was stored in | |
5388 | comp_unit_obstack. But there's no data yet that we need this | |
5389 | optimization. */ | |
5390 | if (cu->dwo_unit != NULL) | |
5391 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5392 | } |
5393 | else | |
5394 | { | |
5395 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5396 | gdb_assert (this_cu->cu == NULL); | |
dee91e82 DE |
5397 | cu = xmalloc (sizeof (*cu)); |
5398 | init_one_comp_unit (cu, this_cu); | |
dee91e82 | 5399 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5400 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5401 | } |
dee91e82 | 5402 | |
b0c7bfa9 | 5403 | /* Get the header. */ |
42e7ad6c DE |
5404 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5405 | { | |
5406 | /* We already have the header, there's no need to read it in again. */ | |
5407 | info_ptr += cu->header.first_die_offset.cu_off; | |
5408 | } | |
5409 | else | |
5410 | { | |
3019eac3 | 5411 | if (this_cu->is_debug_types) |
dee91e82 DE |
5412 | { |
5413 | ULONGEST signature; | |
42e7ad6c | 5414 | cu_offset type_offset_in_tu; |
dee91e82 | 5415 | |
4bdcc0c1 DE |
5416 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5417 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5418 | &signature, |
5419 | &type_offset_in_tu); | |
dee91e82 | 5420 | |
42e7ad6c DE |
5421 | /* Since per_cu is the first member of struct signatured_type, |
5422 | we can go from a pointer to one to a pointer to the other. */ | |
5423 | sig_type = (struct signatured_type *) this_cu; | |
5424 | gdb_assert (sig_type->signature == signature); | |
5425 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5426 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5427 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5428 | ||
42e7ad6c DE |
5429 | /* LENGTH has not been set yet for type units if we're |
5430 | using .gdb_index. */ | |
1ce1cefd | 5431 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5432 | |
5433 | /* Establish the type offset that can be used to lookup the type. */ | |
5434 | sig_type->type_offset_in_section.sect_off = | |
5435 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5436 | } |
5437 | else | |
5438 | { | |
4bdcc0c1 DE |
5439 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5440 | abbrev_section, | |
5441 | info_ptr, 0); | |
dee91e82 DE |
5442 | |
5443 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5444 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5445 | } |
5446 | } | |
10b3939b | 5447 | |
6caca83c | 5448 | /* Skip dummy compilation units. */ |
dee91e82 | 5449 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5450 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5451 | { | |
dee91e82 | 5452 | do_cleanups (cleanups); |
21b2bd31 | 5453 | return; |
6caca83c CC |
5454 | } |
5455 | ||
433df2d4 DE |
5456 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5457 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5458 | done. Note that it's important that if the CU had an abbrev table |
5459 | on entry we don't free it when we're done: Somewhere up the call stack | |
5460 | it may be in use. */ | |
f4dc4d17 DE |
5461 | if (abbrev_table != NULL) |
5462 | { | |
5463 | gdb_assert (cu->abbrev_table == NULL); | |
5464 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5465 | == abbrev_table->offset.sect_off); | |
5466 | cu->abbrev_table = abbrev_table; | |
5467 | } | |
5468 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5469 | { |
4bdcc0c1 | 5470 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5471 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5472 | } | |
42e7ad6c DE |
5473 | else if (rereading_dwo_cu) |
5474 | { | |
5475 | dwarf2_free_abbrev_table (cu); | |
5476 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5477 | } | |
af703f96 | 5478 | |
dee91e82 | 5479 | /* Read the top level CU/TU die. */ |
3019eac3 | 5480 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5481 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5482 | |
b0c7bfa9 DE |
5483 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5484 | from the DWO file. | |
5485 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5486 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5487 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5488 | if (attr) | |
5489 | { | |
3019eac3 | 5490 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5491 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5492 | |
5493 | if (has_children) | |
6a506a2d DE |
5494 | { |
5495 | complaint (&symfile_complaints, | |
5496 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5497 | " has children (offset 0x%x) [in module %s]"), | |
5498 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5499 | } | |
b0c7bfa9 | 5500 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5501 | if (dwo_unit != NULL) |
3019eac3 | 5502 | { |
6a506a2d DE |
5503 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5504 | abbrev_table != NULL, | |
a2ce51a0 | 5505 | comp_unit_die, NULL, |
6a506a2d DE |
5506 | &reader, &info_ptr, |
5507 | &dwo_comp_unit_die, &has_children) == 0) | |
5508 | { | |
5509 | /* Dummy die. */ | |
5510 | do_cleanups (cleanups); | |
5511 | return; | |
5512 | } | |
5513 | comp_unit_die = dwo_comp_unit_die; | |
5514 | } | |
5515 | else | |
5516 | { | |
5517 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5518 | the stub. A complaint has already been logged. There's | |
5519 | not much more we can do except pass on the stub DIE to | |
5520 | die_reader_func. We don't want to throw an error on bad | |
5521 | debug info. */ | |
3019eac3 DE |
5522 | } |
5523 | } | |
5524 | ||
b0c7bfa9 | 5525 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5526 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5527 | ||
b0c7bfa9 | 5528 | /* Done, clean up. */ |
365156ad | 5529 | if (free_cu_cleanup != NULL) |
348e048f | 5530 | { |
365156ad TT |
5531 | if (keep) |
5532 | { | |
5533 | /* We've successfully allocated this compilation unit. Let our | |
5534 | caller clean it up when finished with it. */ | |
5535 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5536 | |
365156ad TT |
5537 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5538 | So we have to manually free the abbrev table. */ | |
5539 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5540 | |
365156ad TT |
5541 | /* Link this CU into read_in_chain. */ |
5542 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5543 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5544 | } | |
5545 | else | |
5546 | do_cleanups (free_cu_cleanup); | |
348e048f | 5547 | } |
365156ad TT |
5548 | |
5549 | do_cleanups (cleanups); | |
dee91e82 DE |
5550 | } |
5551 | ||
33e80786 DE |
5552 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5553 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5554 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5555 | |
5556 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5557 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5558 | |
5559 | We fill in THIS_CU->length. | |
5560 | ||
5561 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5562 | linker) then DIE_READER_FUNC will not get called. | |
5563 | ||
5564 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5565 | This is done in order to not leave THIS_CU->cu in a state where we have |
5566 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5567 | |
5568 | static void | |
5569 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5570 | struct dwo_file *dwo_file, |
dee91e82 DE |
5571 | die_reader_func_ftype *die_reader_func, |
5572 | void *data) | |
5573 | { | |
5574 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5575 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5576 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5577 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5578 | struct dwarf2_cu cu; |
d521ce57 | 5579 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5580 | struct die_reader_specs reader; |
5581 | struct cleanup *cleanups; | |
5582 | struct die_info *comp_unit_die; | |
5583 | int has_children; | |
5584 | ||
09406207 DE |
5585 | if (dwarf2_die_debug) |
5586 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5587 | this_cu->is_debug_types ? "type" : "comp", | |
5588 | this_cu->offset.sect_off); | |
5589 | ||
dee91e82 DE |
5590 | gdb_assert (this_cu->cu == NULL); |
5591 | ||
33e80786 DE |
5592 | abbrev_section = (dwo_file != NULL |
5593 | ? &dwo_file->sections.abbrev | |
5594 | : get_abbrev_section_for_cu (this_cu)); | |
5595 | ||
dee91e82 DE |
5596 | /* This is cheap if the section is already read in. */ |
5597 | dwarf2_read_section (objfile, section); | |
5598 | ||
5599 | init_one_comp_unit (&cu, this_cu); | |
5600 | ||
5601 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5602 | ||
5603 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5604 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5605 | abbrev_section, info_ptr, | |
3019eac3 | 5606 | this_cu->is_debug_types); |
dee91e82 | 5607 | |
1ce1cefd | 5608 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5609 | |
5610 | /* Skip dummy compilation units. */ | |
5611 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5612 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5613 | { |
dee91e82 | 5614 | do_cleanups (cleanups); |
21b2bd31 | 5615 | return; |
93311388 | 5616 | } |
72bf9492 | 5617 | |
dee91e82 DE |
5618 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5619 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5620 | ||
3019eac3 | 5621 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5622 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5623 | ||
5624 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5625 | ||
5626 | do_cleanups (cleanups); | |
5627 | } | |
5628 | ||
3019eac3 DE |
5629 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5630 | does not lookup the specified DWO file. | |
5631 | This cannot be used to read DWO files. | |
dee91e82 DE |
5632 | |
5633 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5634 | This is done in order to not leave THIS_CU->cu in a state where we have |
5635 | to care whether it refers to the "main" CU or the DWO CU. | |
5636 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5637 | |
5638 | static void | |
5639 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5640 | die_reader_func_ftype *die_reader_func, | |
5641 | void *data) | |
5642 | { | |
33e80786 | 5643 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5644 | } |
0018ea6f DE |
5645 | \f |
5646 | /* Type Unit Groups. | |
dee91e82 | 5647 | |
0018ea6f DE |
5648 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5649 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5650 | so that all types coming from the same compilation (.o file) are grouped | |
5651 | together. A future step could be to put the types in the same symtab as | |
5652 | the CU the types ultimately came from. */ | |
ff013f42 | 5653 | |
f4dc4d17 DE |
5654 | static hashval_t |
5655 | hash_type_unit_group (const void *item) | |
5656 | { | |
094b34ac | 5657 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 5658 | |
094b34ac | 5659 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5660 | } |
348e048f DE |
5661 | |
5662 | static int | |
f4dc4d17 | 5663 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5664 | { |
f4dc4d17 DE |
5665 | const struct type_unit_group *lhs = item_lhs; |
5666 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 5667 | |
094b34ac | 5668 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5669 | } |
348e048f | 5670 | |
f4dc4d17 DE |
5671 | /* Allocate a hash table for type unit groups. */ |
5672 | ||
5673 | static htab_t | |
5674 | allocate_type_unit_groups_table (void) | |
5675 | { | |
5676 | return htab_create_alloc_ex (3, | |
5677 | hash_type_unit_group, | |
5678 | eq_type_unit_group, | |
5679 | NULL, | |
5680 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5681 | hashtab_obstack_allocate, | |
5682 | dummy_obstack_deallocate); | |
5683 | } | |
dee91e82 | 5684 | |
f4dc4d17 DE |
5685 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5686 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5687 | of any one psymtab grow too big. */ | |
5688 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5689 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5690 | |
094b34ac | 5691 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5692 | Create the type_unit_group object used to hold one or more TUs. */ |
5693 | ||
5694 | static struct type_unit_group * | |
094b34ac | 5695 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5696 | { |
5697 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5698 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5699 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5700 | |
5701 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5702 | struct type_unit_group); | |
094b34ac | 5703 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5704 | per_cu->objfile = objfile; |
f4dc4d17 | 5705 | |
094b34ac DE |
5706 | if (dwarf2_per_objfile->using_index) |
5707 | { | |
5708 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5709 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5710 | } |
5711 | else | |
5712 | { | |
5713 | unsigned int line_offset = line_offset_struct.sect_off; | |
5714 | struct partial_symtab *pst; | |
5715 | char *name; | |
5716 | ||
5717 | /* Give the symtab a useful name for debug purposes. */ | |
5718 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5719 | name = xstrprintf ("<type_units_%d>", | |
5720 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5721 | else | |
5722 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5723 | ||
5724 | pst = create_partial_symtab (per_cu, name); | |
5725 | pst->anonymous = 1; | |
f4dc4d17 | 5726 | |
094b34ac DE |
5727 | xfree (name); |
5728 | } | |
f4dc4d17 | 5729 | |
094b34ac DE |
5730 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5731 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5732 | |
5733 | return tu_group; | |
5734 | } | |
5735 | ||
094b34ac DE |
5736 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5737 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5738 | |
5739 | static struct type_unit_group * | |
ff39bb5e | 5740 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5741 | { |
5742 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5743 | struct type_unit_group *tu_group; | |
5744 | void **slot; | |
5745 | unsigned int line_offset; | |
5746 | struct type_unit_group type_unit_group_for_lookup; | |
5747 | ||
5748 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5749 | { | |
5750 | dwarf2_per_objfile->type_unit_groups = | |
5751 | allocate_type_unit_groups_table (); | |
5752 | } | |
5753 | ||
5754 | /* Do we need to create a new group, or can we use an existing one? */ | |
5755 | ||
5756 | if (stmt_list) | |
5757 | { | |
5758 | line_offset = DW_UNSND (stmt_list); | |
5759 | ++tu_stats->nr_symtab_sharers; | |
5760 | } | |
5761 | else | |
5762 | { | |
5763 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5764 | We can do various things here like create one group per TU or | |
5765 | spread them over multiple groups to split up the expansion work. | |
5766 | To avoid worst case scenarios (too many groups or too large groups) | |
5767 | we, umm, group them in bunches. */ | |
5768 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5769 | | (tu_stats->nr_stmt_less_type_units | |
5770 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5771 | ++tu_stats->nr_stmt_less_type_units; | |
5772 | } | |
5773 | ||
094b34ac DE |
5774 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5775 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5776 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5777 | &type_unit_group_for_lookup, INSERT); | |
5778 | if (*slot != NULL) | |
5779 | { | |
5780 | tu_group = *slot; | |
5781 | gdb_assert (tu_group != NULL); | |
5782 | } | |
5783 | else | |
5784 | { | |
5785 | sect_offset line_offset_struct; | |
5786 | ||
5787 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5788 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5789 | *slot = tu_group; |
5790 | ++tu_stats->nr_symtabs; | |
5791 | } | |
5792 | ||
5793 | return tu_group; | |
5794 | } | |
0018ea6f DE |
5795 | \f |
5796 | /* Partial symbol tables. */ | |
5797 | ||
5798 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5799 | ||
5800 | The caller must fill in the following details: | |
5801 | dirname, textlow, texthigh. */ | |
5802 | ||
5803 | static struct partial_symtab * | |
5804 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5805 | { | |
5806 | struct objfile *objfile = per_cu->objfile; | |
5807 | struct partial_symtab *pst; | |
5808 | ||
5809 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
5810 | name, 0, | |
5811 | objfile->global_psymbols.next, | |
5812 | objfile->static_psymbols.next); | |
5813 | ||
5814 | pst->psymtabs_addrmap_supported = 1; | |
5815 | ||
5816 | /* This is the glue that links PST into GDB's symbol API. */ | |
5817 | pst->read_symtab_private = per_cu; | |
5818 | pst->read_symtab = dwarf2_read_symtab; | |
5819 | per_cu->v.psymtab = pst; | |
5820 | ||
5821 | return pst; | |
5822 | } | |
5823 | ||
b93601f3 TT |
5824 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5825 | type. */ | |
5826 | ||
5827 | struct process_psymtab_comp_unit_data | |
5828 | { | |
5829 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5830 | ||
5831 | int want_partial_unit; | |
5832 | ||
5833 | /* The "pretend" language that is used if the CU doesn't declare a | |
5834 | language. */ | |
5835 | ||
5836 | enum language pretend_language; | |
5837 | }; | |
5838 | ||
0018ea6f DE |
5839 | /* die_reader_func for process_psymtab_comp_unit. */ |
5840 | ||
5841 | static void | |
5842 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5843 | const gdb_byte *info_ptr, |
0018ea6f DE |
5844 | struct die_info *comp_unit_die, |
5845 | int has_children, | |
5846 | void *data) | |
5847 | { | |
5848 | struct dwarf2_cu *cu = reader->cu; | |
5849 | struct objfile *objfile = cu->objfile; | |
5850 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5851 | struct attribute *attr; | |
5852 | CORE_ADDR baseaddr; | |
5853 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5854 | struct partial_symtab *pst; | |
5855 | int has_pc_info; | |
5856 | const char *filename; | |
b93601f3 | 5857 | struct process_psymtab_comp_unit_data *info = data; |
0018ea6f | 5858 | |
b93601f3 | 5859 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
5860 | return; |
5861 | ||
5862 | gdb_assert (! per_cu->is_debug_types); | |
5863 | ||
b93601f3 | 5864 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
5865 | |
5866 | cu->list_in_scope = &file_symbols; | |
5867 | ||
5868 | /* Allocate a new partial symbol table structure. */ | |
5869 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
5870 | if (attr == NULL || !DW_STRING (attr)) | |
5871 | filename = ""; | |
5872 | else | |
5873 | filename = DW_STRING (attr); | |
5874 | ||
5875 | pst = create_partial_symtab (per_cu, filename); | |
5876 | ||
5877 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
5878 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5879 | if (attr != NULL) | |
5880 | pst->dirname = DW_STRING (attr); | |
5881 | ||
5882 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5883 | ||
5884 | dwarf2_find_base_address (comp_unit_die, cu); | |
5885 | ||
5886 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5887 | `DW_AT_ranges'. */ | |
5888 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
5889 | &best_highpc, cu, pst); | |
5890 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
5891 | /* Store the contiguous range if it is not empty; it can be empty for | |
5892 | CUs with no code. */ | |
5893 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
5894 | best_lowpc + baseaddr, | |
5895 | best_highpc + baseaddr - 1, pst); | |
5896 | ||
5897 | /* Check if comp unit has_children. | |
5898 | If so, read the rest of the partial symbols from this comp unit. | |
5899 | If not, there's no more debug_info for this comp unit. */ | |
5900 | if (has_children) | |
5901 | { | |
5902 | struct partial_die_info *first_die; | |
5903 | CORE_ADDR lowpc, highpc; | |
5904 | ||
5905 | lowpc = ((CORE_ADDR) -1); | |
5906 | highpc = ((CORE_ADDR) 0); | |
5907 | ||
5908 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5909 | ||
5910 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
5911 | ! has_pc_info, cu); | |
5912 | ||
5913 | /* If we didn't find a lowpc, set it to highpc to avoid | |
5914 | complaints from `maint check'. */ | |
5915 | if (lowpc == ((CORE_ADDR) -1)) | |
5916 | lowpc = highpc; | |
5917 | ||
5918 | /* If the compilation unit didn't have an explicit address range, | |
5919 | then use the information extracted from its child dies. */ | |
5920 | if (! has_pc_info) | |
5921 | { | |
5922 | best_lowpc = lowpc; | |
5923 | best_highpc = highpc; | |
5924 | } | |
5925 | } | |
5926 | pst->textlow = best_lowpc + baseaddr; | |
5927 | pst->texthigh = best_highpc + baseaddr; | |
5928 | ||
5929 | pst->n_global_syms = objfile->global_psymbols.next - | |
5930 | (objfile->global_psymbols.list + pst->globals_offset); | |
5931 | pst->n_static_syms = objfile->static_psymbols.next - | |
5932 | (objfile->static_psymbols.list + pst->statics_offset); | |
5933 | sort_pst_symbols (objfile, pst); | |
5934 | ||
5935 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
5936 | { | |
5937 | int i; | |
5938 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5939 | struct dwarf2_per_cu_data *iter; | |
5940 | ||
5941 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
5942 | post-pass. */ | |
5943 | pst->number_of_dependencies = len; | |
5944 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5945 | len * sizeof (struct symtab *)); | |
5946 | for (i = 0; | |
5947 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
5948 | i, iter); | |
5949 | ++i) | |
5950 | pst->dependencies[i] = iter->v.psymtab; | |
5951 | ||
5952 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5953 | } | |
5954 | ||
5955 | /* Get the list of files included in the current compilation unit, | |
5956 | and build a psymtab for each of them. */ | |
5957 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
5958 | ||
5959 | if (dwarf2_read_debug) | |
5960 | { | |
5961 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
5962 | ||
5963 | fprintf_unfiltered (gdb_stdlog, | |
5964 | "Psymtab for %s unit @0x%x: %s - %s" | |
5965 | ", %d global, %d static syms\n", | |
5966 | per_cu->is_debug_types ? "type" : "comp", | |
5967 | per_cu->offset.sect_off, | |
5968 | paddress (gdbarch, pst->textlow), | |
5969 | paddress (gdbarch, pst->texthigh), | |
5970 | pst->n_global_syms, pst->n_static_syms); | |
5971 | } | |
5972 | } | |
5973 | ||
5974 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5975 | Process compilation unit THIS_CU for a psymtab. */ | |
5976 | ||
5977 | static void | |
5978 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
5979 | int want_partial_unit, |
5980 | enum language pretend_language) | |
0018ea6f | 5981 | { |
b93601f3 TT |
5982 | struct process_psymtab_comp_unit_data info; |
5983 | ||
0018ea6f DE |
5984 | /* If this compilation unit was already read in, free the |
5985 | cached copy in order to read it in again. This is | |
5986 | necessary because we skipped some symbols when we first | |
5987 | read in the compilation unit (see load_partial_dies). | |
5988 | This problem could be avoided, but the benefit is unclear. */ | |
5989 | if (this_cu->cu != NULL) | |
5990 | free_one_cached_comp_unit (this_cu); | |
5991 | ||
5992 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
5993 | info.want_partial_unit = want_partial_unit; |
5994 | info.pretend_language = pretend_language; | |
0018ea6f DE |
5995 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
5996 | process_psymtab_comp_unit_reader, | |
b93601f3 | 5997 | &info); |
0018ea6f DE |
5998 | |
5999 | /* Age out any secondary CUs. */ | |
6000 | age_cached_comp_units (); | |
6001 | } | |
f4dc4d17 DE |
6002 | |
6003 | /* Reader function for build_type_psymtabs. */ | |
6004 | ||
6005 | static void | |
6006 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6007 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6008 | struct die_info *type_unit_die, |
6009 | int has_children, | |
6010 | void *data) | |
6011 | { | |
6012 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6013 | struct dwarf2_cu *cu = reader->cu; | |
6014 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6015 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6016 | struct type_unit_group *tu_group; |
6017 | struct attribute *attr; | |
6018 | struct partial_die_info *first_die; | |
6019 | CORE_ADDR lowpc, highpc; | |
6020 | struct partial_symtab *pst; | |
6021 | ||
6022 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6023 | gdb_assert (per_cu->is_debug_types); |
6024 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6025 | |
6026 | if (! has_children) | |
6027 | return; | |
6028 | ||
6029 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6030 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6031 | |
0186c6a7 | 6032 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6033 | |
6034 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6035 | cu->list_in_scope = &file_symbols; | |
6036 | pst = create_partial_symtab (per_cu, ""); | |
6037 | pst->anonymous = 1; | |
6038 | ||
6039 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6040 | ||
6041 | lowpc = (CORE_ADDR) -1; | |
6042 | highpc = (CORE_ADDR) 0; | |
6043 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6044 | ||
6045 | pst->n_global_syms = objfile->global_psymbols.next - | |
6046 | (objfile->global_psymbols.list + pst->globals_offset); | |
6047 | pst->n_static_syms = objfile->static_psymbols.next - | |
6048 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 6049 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
6050 | } |
6051 | ||
73051182 DE |
6052 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6053 | ||
6054 | struct tu_abbrev_offset | |
6055 | { | |
6056 | struct signatured_type *sig_type; | |
6057 | sect_offset abbrev_offset; | |
6058 | }; | |
6059 | ||
6060 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6061 | ||
6062 | static int | |
6063 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6064 | { | |
6065 | const struct tu_abbrev_offset * const *a = ap; | |
6066 | const struct tu_abbrev_offset * const *b = bp; | |
6067 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
6068 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
6069 | ||
6070 | return (aoff > boff) - (aoff < boff); | |
6071 | } | |
6072 | ||
6073 | /* Efficiently read all the type units. | |
6074 | This does the bulk of the work for build_type_psymtabs. | |
6075 | ||
6076 | The efficiency is because we sort TUs by the abbrev table they use and | |
6077 | only read each abbrev table once. In one program there are 200K TUs | |
6078 | sharing 8K abbrev tables. | |
6079 | ||
6080 | The main purpose of this function is to support building the | |
6081 | dwarf2_per_objfile->type_unit_groups table. | |
6082 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6083 | can collapse the search space by grouping them by stmt_list. | |
6084 | The savings can be significant, in the same program from above the 200K TUs | |
6085 | share 8K stmt_list tables. | |
6086 | ||
6087 | FUNC is expected to call get_type_unit_group, which will create the | |
6088 | struct type_unit_group if necessary and add it to | |
6089 | dwarf2_per_objfile->type_unit_groups. */ | |
6090 | ||
6091 | static void | |
6092 | build_type_psymtabs_1 (void) | |
6093 | { | |
6094 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6095 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6096 | struct cleanup *cleanups; | |
6097 | struct abbrev_table *abbrev_table; | |
6098 | sect_offset abbrev_offset; | |
6099 | struct tu_abbrev_offset *sorted_by_abbrev; | |
6100 | struct type_unit_group **iter; | |
6101 | int i; | |
6102 | ||
6103 | /* It's up to the caller to not call us multiple times. */ | |
6104 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6105 | ||
6106 | if (dwarf2_per_objfile->n_type_units == 0) | |
6107 | return; | |
6108 | ||
6109 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6110 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6111 | read each abbrev table in. | |
6112 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6113 | This is simpler and efficient enough for now. | |
6114 | ||
6115 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6116 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6117 | stmt_list value too so in practice this should work well. | |
6118 | ||
6119 | The basic algorithm here is: | |
6120 | ||
6121 | sort TUs by abbrev table | |
6122 | for each TU with same abbrev table: | |
6123 | read abbrev table if first user | |
6124 | read TU top level DIE | |
6125 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6126 | call FUNC */ | |
6127 | ||
6128 | if (dwarf2_read_debug) | |
6129 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
6130 | ||
6131 | /* Sort in a separate table to maintain the order of all_type_units | |
6132 | for .gdb_index: TU indices directly index all_type_units. */ | |
6133 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6134 | dwarf2_per_objfile->n_type_units); | |
6135 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6136 | { | |
6137 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6138 | ||
6139 | sorted_by_abbrev[i].sig_type = sig_type; | |
6140 | sorted_by_abbrev[i].abbrev_offset = | |
6141 | read_abbrev_offset (sig_type->per_cu.section, | |
6142 | sig_type->per_cu.offset); | |
6143 | } | |
6144 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6145 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6146 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6147 | ||
6148 | abbrev_offset.sect_off = ~(unsigned) 0; | |
6149 | abbrev_table = NULL; | |
6150 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6151 | ||
6152 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6153 | { | |
6154 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6155 | ||
6156 | /* Switch to the next abbrev table if necessary. */ | |
6157 | if (abbrev_table == NULL | |
6158 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
6159 | { | |
6160 | if (abbrev_table != NULL) | |
6161 | { | |
6162 | abbrev_table_free (abbrev_table); | |
6163 | /* Reset to NULL in case abbrev_table_read_table throws | |
6164 | an error: abbrev_table_free_cleanup will get called. */ | |
6165 | abbrev_table = NULL; | |
6166 | } | |
6167 | abbrev_offset = tu->abbrev_offset; | |
6168 | abbrev_table = | |
6169 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6170 | abbrev_offset); | |
6171 | ++tu_stats->nr_uniq_abbrev_tables; | |
6172 | } | |
6173 | ||
6174 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6175 | build_type_psymtabs_reader, NULL); | |
6176 | } | |
6177 | ||
73051182 | 6178 | do_cleanups (cleanups); |
6aa5f3a6 | 6179 | } |
73051182 | 6180 | |
6aa5f3a6 DE |
6181 | /* Print collected type unit statistics. */ |
6182 | ||
6183 | static void | |
6184 | print_tu_stats (void) | |
6185 | { | |
6186 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6187 | ||
6188 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6189 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6190 | dwarf2_per_objfile->n_type_units); | |
6191 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6192 | tu_stats->nr_uniq_abbrev_tables); | |
6193 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6194 | tu_stats->nr_symtabs); | |
6195 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6196 | tu_stats->nr_symtab_sharers); | |
6197 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6198 | tu_stats->nr_stmt_less_type_units); | |
6199 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6200 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6201 | } |
6202 | ||
f4dc4d17 DE |
6203 | /* Traversal function for build_type_psymtabs. */ |
6204 | ||
6205 | static int | |
6206 | build_type_psymtab_dependencies (void **slot, void *info) | |
6207 | { | |
6208 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6209 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6210 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6211 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6212 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6213 | struct signatured_type *iter; | |
f4dc4d17 DE |
6214 | int i; |
6215 | ||
6216 | gdb_assert (len > 0); | |
0186c6a7 | 6217 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6218 | |
6219 | pst->number_of_dependencies = len; | |
6220 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
6221 | len * sizeof (struct psymtab *)); | |
6222 | for (i = 0; | |
0186c6a7 | 6223 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6224 | ++i) |
6225 | { | |
0186c6a7 DE |
6226 | gdb_assert (iter->per_cu.is_debug_types); |
6227 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6228 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6229 | } |
6230 | ||
0186c6a7 | 6231 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6232 | |
6233 | return 1; | |
6234 | } | |
6235 | ||
6236 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6237 | Build partial symbol tables for the .debug_types comp-units. */ | |
6238 | ||
6239 | static void | |
6240 | build_type_psymtabs (struct objfile *objfile) | |
6241 | { | |
0e50663e | 6242 | if (! create_all_type_units (objfile)) |
348e048f DE |
6243 | return; |
6244 | ||
73051182 | 6245 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6246 | } |
f4dc4d17 | 6247 | |
6aa5f3a6 DE |
6248 | /* Traversal function for process_skeletonless_type_unit. |
6249 | Read a TU in a DWO file and build partial symbols for it. */ | |
6250 | ||
6251 | static int | |
6252 | process_skeletonless_type_unit (void **slot, void *info) | |
6253 | { | |
6254 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
6255 | struct objfile *objfile = info; | |
6256 | struct signatured_type find_entry, *entry; | |
6257 | ||
6258 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6259 | ||
6260 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6261 | { | |
6262 | dwarf2_per_objfile->signatured_types | |
6263 | = allocate_signatured_type_table (objfile); | |
6264 | } | |
6265 | ||
6266 | find_entry.signature = dwo_unit->signature; | |
6267 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6268 | INSERT); | |
6269 | /* If we've already seen this type there's nothing to do. What's happening | |
6270 | is we're doing our own version of comdat-folding here. */ | |
6271 | if (*slot != NULL) | |
6272 | return 1; | |
6273 | ||
6274 | /* This does the job that create_all_type_units would have done for | |
6275 | this TU. */ | |
6276 | entry = add_type_unit (dwo_unit->signature, slot); | |
6277 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6278 | *slot = entry; | |
6279 | ||
6280 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6281 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6282 | build_type_psymtabs_reader, NULL); | |
6283 | ||
6284 | return 1; | |
6285 | } | |
6286 | ||
6287 | /* Traversal function for process_skeletonless_type_units. */ | |
6288 | ||
6289 | static int | |
6290 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6291 | { | |
6292 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6293 | ||
6294 | if (dwo_file->tus != NULL) | |
6295 | { | |
6296 | htab_traverse_noresize (dwo_file->tus, | |
6297 | process_skeletonless_type_unit, info); | |
6298 | } | |
6299 | ||
6300 | return 1; | |
6301 | } | |
6302 | ||
6303 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6304 | This is needed in case a TU was emitted without its skeleton. | |
6305 | Note: This can't be done until we know what all the DWO files are. */ | |
6306 | ||
6307 | static void | |
6308 | process_skeletonless_type_units (struct objfile *objfile) | |
6309 | { | |
6310 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6311 | if (get_dwp_file () == NULL | |
6312 | && dwarf2_per_objfile->dwo_files != NULL) | |
6313 | { | |
6314 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6315 | process_dwo_file_for_skeletonless_type_units, | |
6316 | objfile); | |
6317 | } | |
348e048f DE |
6318 | } |
6319 | ||
60606b2c TT |
6320 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6321 | ||
6322 | static void | |
6323 | psymtabs_addrmap_cleanup (void *o) | |
6324 | { | |
6325 | struct objfile *objfile = o; | |
ec61707d | 6326 | |
60606b2c TT |
6327 | objfile->psymtabs_addrmap = NULL; |
6328 | } | |
6329 | ||
95554aad TT |
6330 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6331 | ||
6332 | static void | |
6333 | set_partial_user (struct objfile *objfile) | |
6334 | { | |
6335 | int i; | |
6336 | ||
6337 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6338 | { | |
8832e7e3 | 6339 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6340 | struct partial_symtab *pst = per_cu->v.psymtab; |
6341 | int j; | |
6342 | ||
36586728 TT |
6343 | if (pst == NULL) |
6344 | continue; | |
6345 | ||
95554aad TT |
6346 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6347 | { | |
6348 | /* Set the 'user' field only if it is not already set. */ | |
6349 | if (pst->dependencies[j]->user == NULL) | |
6350 | pst->dependencies[j]->user = pst; | |
6351 | } | |
6352 | } | |
6353 | } | |
6354 | ||
93311388 DE |
6355 | /* Build the partial symbol table by doing a quick pass through the |
6356 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6357 | |
93311388 | 6358 | static void |
c67a9c90 | 6359 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6360 | { |
60606b2c TT |
6361 | struct cleanup *back_to, *addrmap_cleanup; |
6362 | struct obstack temp_obstack; | |
21b2bd31 | 6363 | int i; |
93311388 | 6364 | |
45cfd468 DE |
6365 | if (dwarf2_read_debug) |
6366 | { | |
6367 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6368 | objfile_name (objfile)); |
45cfd468 DE |
6369 | } |
6370 | ||
98bfdba5 PA |
6371 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6372 | ||
be391dca | 6373 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6374 | |
93311388 DE |
6375 | /* Any cached compilation units will be linked by the per-objfile |
6376 | read_in_chain. Make sure to free them when we're done. */ | |
6377 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6378 | |
348e048f DE |
6379 | build_type_psymtabs (objfile); |
6380 | ||
93311388 | 6381 | create_all_comp_units (objfile); |
c906108c | 6382 | |
60606b2c TT |
6383 | /* Create a temporary address map on a temporary obstack. We later |
6384 | copy this to the final obstack. */ | |
6385 | obstack_init (&temp_obstack); | |
6386 | make_cleanup_obstack_free (&temp_obstack); | |
6387 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6388 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6389 | |
21b2bd31 | 6390 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6391 | { |
8832e7e3 | 6392 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6393 | |
b93601f3 | 6394 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6395 | } |
ff013f42 | 6396 | |
6aa5f3a6 DE |
6397 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6398 | process_skeletonless_type_units (objfile); | |
6399 | ||
6400 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6401 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6402 | { | |
6403 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6404 | build_type_psymtab_dependencies, NULL); | |
6405 | } | |
6406 | ||
6407 | if (dwarf2_read_debug) | |
6408 | print_tu_stats (); | |
6409 | ||
95554aad TT |
6410 | set_partial_user (objfile); |
6411 | ||
ff013f42 JK |
6412 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6413 | &objfile->objfile_obstack); | |
60606b2c | 6414 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6415 | |
ae038cb0 | 6416 | do_cleanups (back_to); |
45cfd468 DE |
6417 | |
6418 | if (dwarf2_read_debug) | |
6419 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
4262abfb | 6420 | objfile_name (objfile)); |
ae038cb0 DJ |
6421 | } |
6422 | ||
3019eac3 | 6423 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6424 | |
6425 | static void | |
dee91e82 | 6426 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6427 | const gdb_byte *info_ptr, |
dee91e82 DE |
6428 | struct die_info *comp_unit_die, |
6429 | int has_children, | |
6430 | void *data) | |
ae038cb0 | 6431 | { |
dee91e82 | 6432 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6433 | |
95554aad | 6434 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6435 | |
ae038cb0 DJ |
6436 | /* Check if comp unit has_children. |
6437 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6438 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6439 | if (has_children) |
dee91e82 DE |
6440 | load_partial_dies (reader, info_ptr, 0); |
6441 | } | |
98bfdba5 | 6442 | |
dee91e82 DE |
6443 | /* Load the partial DIEs for a secondary CU into memory. |
6444 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6445 | |
dee91e82 DE |
6446 | static void |
6447 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6448 | { | |
f4dc4d17 DE |
6449 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6450 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6451 | } |
6452 | ||
ae038cb0 | 6453 | static void |
36586728 TT |
6454 | read_comp_units_from_section (struct objfile *objfile, |
6455 | struct dwarf2_section_info *section, | |
6456 | unsigned int is_dwz, | |
6457 | int *n_allocated, | |
6458 | int *n_comp_units, | |
6459 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6460 | { |
d521ce57 | 6461 | const gdb_byte *info_ptr; |
a32a8923 | 6462 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6463 | |
bf6af496 DE |
6464 | if (dwarf2_read_debug) |
6465 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", | |
a32a8923 DE |
6466 | get_section_name (section), |
6467 | get_section_file_name (section)); | |
bf6af496 | 6468 | |
36586728 | 6469 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6470 | |
36586728 | 6471 | info_ptr = section->buffer; |
6e70227d | 6472 | |
36586728 | 6473 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6474 | { |
c764a876 | 6475 | unsigned int length, initial_length_size; |
ae038cb0 | 6476 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6477 | sect_offset offset; |
ae038cb0 | 6478 | |
36586728 | 6479 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6480 | |
6481 | /* Read just enough information to find out where the next | |
6482 | compilation unit is. */ | |
36586728 | 6483 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6484 | |
6485 | /* Save the compilation unit for later lookup. */ | |
6486 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
6487 | sizeof (struct dwarf2_per_cu_data)); | |
6488 | memset (this_cu, 0, sizeof (*this_cu)); | |
6489 | this_cu->offset = offset; | |
c764a876 | 6490 | this_cu->length = length + initial_length_size; |
36586728 | 6491 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6492 | this_cu->objfile = objfile; |
8a0459fd | 6493 | this_cu->section = section; |
ae038cb0 | 6494 | |
36586728 | 6495 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6496 | { |
36586728 TT |
6497 | *n_allocated *= 2; |
6498 | *all_comp_units = xrealloc (*all_comp_units, | |
6499 | *n_allocated | |
6500 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 6501 | } |
36586728 TT |
6502 | (*all_comp_units)[*n_comp_units] = this_cu; |
6503 | ++*n_comp_units; | |
ae038cb0 DJ |
6504 | |
6505 | info_ptr = info_ptr + this_cu->length; | |
6506 | } | |
36586728 TT |
6507 | } |
6508 | ||
6509 | /* Create a list of all compilation units in OBJFILE. | |
6510 | This is only done for -readnow and building partial symtabs. */ | |
6511 | ||
6512 | static void | |
6513 | create_all_comp_units (struct objfile *objfile) | |
6514 | { | |
6515 | int n_allocated; | |
6516 | int n_comp_units; | |
6517 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6518 | struct dwz_file *dwz; |
36586728 TT |
6519 | |
6520 | n_comp_units = 0; | |
6521 | n_allocated = 10; | |
6522 | all_comp_units = xmalloc (n_allocated | |
6523 | * sizeof (struct dwarf2_per_cu_data *)); | |
6524 | ||
6525 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6526 | &n_allocated, &n_comp_units, &all_comp_units); | |
6527 | ||
4db1a1dc TT |
6528 | dwz = dwarf2_get_dwz_file (); |
6529 | if (dwz != NULL) | |
6530 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6531 | &n_allocated, &n_comp_units, | |
6532 | &all_comp_units); | |
ae038cb0 DJ |
6533 | |
6534 | dwarf2_per_objfile->all_comp_units | |
6535 | = obstack_alloc (&objfile->objfile_obstack, | |
6536 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6537 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
6538 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6539 | xfree (all_comp_units); | |
6540 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6541 | } |
6542 | ||
5734ee8b | 6543 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6544 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6545 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6546 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6547 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6548 | |
72bf9492 DJ |
6549 | static void |
6550 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6551 | CORE_ADDR *highpc, int set_addrmap, |
6552 | struct dwarf2_cu *cu) | |
c906108c | 6553 | { |
72bf9492 | 6554 | struct partial_die_info *pdi; |
c906108c | 6555 | |
91c24f0a DC |
6556 | /* Now, march along the PDI's, descending into ones which have |
6557 | interesting children but skipping the children of the other ones, | |
6558 | until we reach the end of the compilation unit. */ | |
c906108c | 6559 | |
72bf9492 | 6560 | pdi = first_die; |
91c24f0a | 6561 | |
72bf9492 DJ |
6562 | while (pdi != NULL) |
6563 | { | |
6564 | fixup_partial_die (pdi, cu); | |
c906108c | 6565 | |
f55ee35c | 6566 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6567 | children, so we need to look at them. Ditto for anonymous |
6568 | enums. */ | |
933c6fe4 | 6569 | |
72bf9492 | 6570 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6571 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6572 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6573 | { |
72bf9492 | 6574 | switch (pdi->tag) |
c906108c SS |
6575 | { |
6576 | case DW_TAG_subprogram: | |
cdc07690 | 6577 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6578 | break; |
72929c62 | 6579 | case DW_TAG_constant: |
c906108c SS |
6580 | case DW_TAG_variable: |
6581 | case DW_TAG_typedef: | |
91c24f0a | 6582 | case DW_TAG_union_type: |
72bf9492 | 6583 | if (!pdi->is_declaration) |
63d06c5c | 6584 | { |
72bf9492 | 6585 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6586 | } |
6587 | break; | |
c906108c | 6588 | case DW_TAG_class_type: |
680b30c7 | 6589 | case DW_TAG_interface_type: |
c906108c | 6590 | case DW_TAG_structure_type: |
72bf9492 | 6591 | if (!pdi->is_declaration) |
c906108c | 6592 | { |
72bf9492 | 6593 | add_partial_symbol (pdi, cu); |
c906108c SS |
6594 | } |
6595 | break; | |
91c24f0a | 6596 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6597 | if (!pdi->is_declaration) |
6598 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6599 | break; |
6600 | case DW_TAG_base_type: | |
a02abb62 | 6601 | case DW_TAG_subrange_type: |
c906108c | 6602 | /* File scope base type definitions are added to the partial |
c5aa993b | 6603 | symbol table. */ |
72bf9492 | 6604 | add_partial_symbol (pdi, cu); |
c906108c | 6605 | break; |
d9fa45fe | 6606 | case DW_TAG_namespace: |
cdc07690 | 6607 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6608 | break; |
5d7cb8df | 6609 | case DW_TAG_module: |
cdc07690 | 6610 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6611 | break; |
95554aad TT |
6612 | case DW_TAG_imported_unit: |
6613 | { | |
6614 | struct dwarf2_per_cu_data *per_cu; | |
6615 | ||
f4dc4d17 DE |
6616 | /* For now we don't handle imported units in type units. */ |
6617 | if (cu->per_cu->is_debug_types) | |
6618 | { | |
6619 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6620 | " supported in type units [in module %s]"), | |
4262abfb | 6621 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6622 | } |
6623 | ||
95554aad | 6624 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6625 | pdi->is_dwz, |
95554aad TT |
6626 | cu->objfile); |
6627 | ||
6628 | /* Go read the partial unit, if needed. */ | |
6629 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6630 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6631 | |
f4dc4d17 | 6632 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6633 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6634 | } |
6635 | break; | |
74921315 KS |
6636 | case DW_TAG_imported_declaration: |
6637 | add_partial_symbol (pdi, cu); | |
6638 | break; | |
c906108c SS |
6639 | default: |
6640 | break; | |
6641 | } | |
6642 | } | |
6643 | ||
72bf9492 DJ |
6644 | /* If the die has a sibling, skip to the sibling. */ |
6645 | ||
6646 | pdi = pdi->die_sibling; | |
6647 | } | |
6648 | } | |
6649 | ||
6650 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6651 | |
72bf9492 | 6652 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
6653 | name is concatenated with "::" and the partial DIE's name. For |
6654 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
6655 | Enumerators are an exception; they use the scope of their parent |
6656 | enumeration type, i.e. the name of the enumeration type is not | |
6657 | prepended to the enumerator. | |
91c24f0a | 6658 | |
72bf9492 DJ |
6659 | There are two complexities. One is DW_AT_specification; in this |
6660 | case "parent" means the parent of the target of the specification, | |
6661 | instead of the direct parent of the DIE. The other is compilers | |
6662 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6663 | the fully qualified name of structure types from their members' | |
6664 | linkage names. This must be done using the DIE's children rather | |
6665 | than the children of any DW_AT_specification target. We only need | |
6666 | to do this for structures at the top level, i.e. if the target of | |
6667 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6668 | have a parent. */ | |
6669 | ||
6670 | /* Compute the scope prefix associated with PDI's parent, in | |
6671 | compilation unit CU. The result will be allocated on CU's | |
6672 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6673 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6674 | static const char * |
72bf9492 DJ |
6675 | partial_die_parent_scope (struct partial_die_info *pdi, |
6676 | struct dwarf2_cu *cu) | |
6677 | { | |
15d034d0 | 6678 | const char *grandparent_scope; |
72bf9492 | 6679 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6680 | |
72bf9492 DJ |
6681 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6682 | then this means the parent of the specification DIE. */ | |
6683 | ||
6684 | real_pdi = pdi; | |
72bf9492 | 6685 | while (real_pdi->has_specification) |
36586728 TT |
6686 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6687 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6688 | |
6689 | parent = real_pdi->die_parent; | |
6690 | if (parent == NULL) | |
6691 | return NULL; | |
6692 | ||
6693 | if (parent->scope_set) | |
6694 | return parent->scope; | |
6695 | ||
6696 | fixup_partial_die (parent, cu); | |
6697 | ||
10b3939b | 6698 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6699 | |
acebe513 UW |
6700 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6701 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6702 | Work around this problem here. */ | |
6703 | if (cu->language == language_cplus | |
6e70227d | 6704 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6705 | && strcmp (parent->name, "::") == 0 |
6706 | && grandparent_scope == NULL) | |
6707 | { | |
6708 | parent->scope = NULL; | |
6709 | parent->scope_set = 1; | |
6710 | return NULL; | |
6711 | } | |
6712 | ||
9c6c53f7 SA |
6713 | if (pdi->tag == DW_TAG_enumerator) |
6714 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6715 | parent->scope = grandparent_scope; | |
6716 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6717 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6718 | || parent->tag == DW_TAG_structure_type |
6719 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6720 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6721 | || parent->tag == DW_TAG_union_type |
6722 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6723 | { |
6724 | if (grandparent_scope == NULL) | |
6725 | parent->scope = parent->name; | |
6726 | else | |
3e43a32a MS |
6727 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6728 | grandparent_scope, | |
f55ee35c | 6729 | parent->name, 0, cu); |
72bf9492 | 6730 | } |
72bf9492 DJ |
6731 | else |
6732 | { | |
6733 | /* FIXME drow/2004-04-01: What should we be doing with | |
6734 | function-local names? For partial symbols, we should probably be | |
6735 | ignoring them. */ | |
6736 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6737 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6738 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6739 | parent->scope = grandparent_scope; |
c906108c SS |
6740 | } |
6741 | ||
72bf9492 DJ |
6742 | parent->scope_set = 1; |
6743 | return parent->scope; | |
6744 | } | |
6745 | ||
6746 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6747 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6748 | |
72bf9492 DJ |
6749 | static char * |
6750 | partial_die_full_name (struct partial_die_info *pdi, | |
6751 | struct dwarf2_cu *cu) | |
6752 | { | |
15d034d0 | 6753 | const char *parent_scope; |
72bf9492 | 6754 | |
98bfdba5 PA |
6755 | /* If this is a template instantiation, we can not work out the |
6756 | template arguments from partial DIEs. So, unfortunately, we have | |
6757 | to go through the full DIEs. At least any work we do building | |
6758 | types here will be reused if full symbols are loaded later. */ | |
6759 | if (pdi->has_template_arguments) | |
6760 | { | |
6761 | fixup_partial_die (pdi, cu); | |
6762 | ||
6763 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6764 | { | |
6765 | struct die_info *die; | |
6766 | struct attribute attr; | |
6767 | struct dwarf2_cu *ref_cu = cu; | |
6768 | ||
b64f50a1 | 6769 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
6770 | attr.name = 0; |
6771 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 6772 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6773 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6774 | ||
6775 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6776 | } | |
6777 | } | |
6778 | ||
72bf9492 DJ |
6779 | parent_scope = partial_die_parent_scope (pdi, cu); |
6780 | if (parent_scope == NULL) | |
6781 | return NULL; | |
6782 | else | |
f55ee35c | 6783 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6784 | } |
6785 | ||
6786 | static void | |
72bf9492 | 6787 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6788 | { |
e7c27a73 | 6789 | struct objfile *objfile = cu->objfile; |
c906108c | 6790 | CORE_ADDR addr = 0; |
15d034d0 | 6791 | const char *actual_name = NULL; |
e142c38c | 6792 | CORE_ADDR baseaddr; |
15d034d0 | 6793 | char *built_actual_name; |
e142c38c DJ |
6794 | |
6795 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6796 | |
15d034d0 TT |
6797 | built_actual_name = partial_die_full_name (pdi, cu); |
6798 | if (built_actual_name != NULL) | |
6799 | actual_name = built_actual_name; | |
63d06c5c | 6800 | |
72bf9492 DJ |
6801 | if (actual_name == NULL) |
6802 | actual_name = pdi->name; | |
6803 | ||
c906108c SS |
6804 | switch (pdi->tag) |
6805 | { | |
6806 | case DW_TAG_subprogram: | |
2cfa0c8d | 6807 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6808 | { |
2cfa0c8d JB |
6809 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6810 | of the global scope. But in Ada, we want to be able to access | |
6811 | nested procedures globally. So all Ada subprograms are stored | |
6812 | in the global scope. */ | |
f47fb265 | 6813 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6814 | mst_text, objfile); */ |
f47fb265 | 6815 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6816 | built_actual_name != NULL, |
f47fb265 MS |
6817 | VAR_DOMAIN, LOC_BLOCK, |
6818 | &objfile->global_psymbols, | |
6819 | 0, pdi->lowpc + baseaddr, | |
6820 | cu->language, objfile); | |
c906108c SS |
6821 | } |
6822 | else | |
6823 | { | |
f47fb265 | 6824 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6825 | mst_file_text, objfile); */ |
f47fb265 | 6826 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6827 | built_actual_name != NULL, |
f47fb265 MS |
6828 | VAR_DOMAIN, LOC_BLOCK, |
6829 | &objfile->static_psymbols, | |
6830 | 0, pdi->lowpc + baseaddr, | |
6831 | cu->language, objfile); | |
c906108c SS |
6832 | } |
6833 | break; | |
72929c62 JB |
6834 | case DW_TAG_constant: |
6835 | { | |
6836 | struct psymbol_allocation_list *list; | |
6837 | ||
6838 | if (pdi->is_external) | |
6839 | list = &objfile->global_psymbols; | |
6840 | else | |
6841 | list = &objfile->static_psymbols; | |
f47fb265 | 6842 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6843 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
f47fb265 | 6844 | list, 0, 0, cu->language, objfile); |
72929c62 JB |
6845 | } |
6846 | break; | |
c906108c | 6847 | case DW_TAG_variable: |
95554aad TT |
6848 | if (pdi->d.locdesc) |
6849 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6850 | |
95554aad | 6851 | if (pdi->d.locdesc |
caac4577 JG |
6852 | && addr == 0 |
6853 | && !dwarf2_per_objfile->has_section_at_zero) | |
6854 | { | |
6855 | /* A global or static variable may also have been stripped | |
6856 | out by the linker if unused, in which case its address | |
6857 | will be nullified; do not add such variables into partial | |
6858 | symbol table then. */ | |
6859 | } | |
6860 | else if (pdi->is_external) | |
c906108c SS |
6861 | { |
6862 | /* Global Variable. | |
6863 | Don't enter into the minimal symbol tables as there is | |
6864 | a minimal symbol table entry from the ELF symbols already. | |
6865 | Enter into partial symbol table if it has a location | |
6866 | descriptor or a type. | |
6867 | If the location descriptor is missing, new_symbol will create | |
6868 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6869 | be determined from the minimal symbol table whenever the variable | |
6870 | is referenced. | |
6871 | The address for the partial symbol table entry is not | |
6872 | used by GDB, but it comes in handy for debugging partial symbol | |
6873 | table building. */ | |
6874 | ||
95554aad | 6875 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6876 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6877 | built_actual_name != NULL, |
f47fb265 MS |
6878 | VAR_DOMAIN, LOC_STATIC, |
6879 | &objfile->global_psymbols, | |
6880 | 0, addr + baseaddr, | |
6881 | cu->language, objfile); | |
c906108c SS |
6882 | } |
6883 | else | |
6884 | { | |
0963b4bd | 6885 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 6886 | if (pdi->d.locdesc == NULL) |
decbce07 | 6887 | { |
15d034d0 | 6888 | xfree (built_actual_name); |
decbce07 MS |
6889 | return; |
6890 | } | |
f47fb265 | 6891 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 6892 | mst_file_data, objfile); */ |
f47fb265 | 6893 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6894 | built_actual_name != NULL, |
f47fb265 MS |
6895 | VAR_DOMAIN, LOC_STATIC, |
6896 | &objfile->static_psymbols, | |
6897 | 0, addr + baseaddr, | |
6898 | cu->language, objfile); | |
c906108c SS |
6899 | } |
6900 | break; | |
6901 | case DW_TAG_typedef: | |
6902 | case DW_TAG_base_type: | |
a02abb62 | 6903 | case DW_TAG_subrange_type: |
38d518c9 | 6904 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6905 | built_actual_name != NULL, |
176620f1 | 6906 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6907 | &objfile->static_psymbols, |
e142c38c | 6908 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6909 | break; |
74921315 | 6910 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
6911 | case DW_TAG_namespace: |
6912 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6913 | built_actual_name != NULL, |
72bf9492 DJ |
6914 | VAR_DOMAIN, LOC_TYPEDEF, |
6915 | &objfile->global_psymbols, | |
6916 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6917 | break; | |
530e8392 KB |
6918 | case DW_TAG_module: |
6919 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
6920 | built_actual_name != NULL, | |
6921 | MODULE_DOMAIN, LOC_TYPEDEF, | |
6922 | &objfile->global_psymbols, | |
6923 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6924 | break; | |
c906108c | 6925 | case DW_TAG_class_type: |
680b30c7 | 6926 | case DW_TAG_interface_type: |
c906108c SS |
6927 | case DW_TAG_structure_type: |
6928 | case DW_TAG_union_type: | |
6929 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
6930 | /* Skip external references. The DWARF standard says in the section |
6931 | about "Structure, Union, and Class Type Entries": "An incomplete | |
6932 | structure, union or class type is represented by a structure, | |
6933 | union or class entry that does not have a byte size attribute | |
6934 | and that has a DW_AT_declaration attribute." */ | |
6935 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 6936 | { |
15d034d0 | 6937 | xfree (built_actual_name); |
decbce07 MS |
6938 | return; |
6939 | } | |
fa4028e9 | 6940 | |
63d06c5c DC |
6941 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
6942 | static vs. global. */ | |
38d518c9 | 6943 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6944 | built_actual_name != NULL, |
176620f1 | 6945 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
6946 | (cu->language == language_cplus |
6947 | || cu->language == language_java) | |
63d06c5c DC |
6948 | ? &objfile->global_psymbols |
6949 | : &objfile->static_psymbols, | |
e142c38c | 6950 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6951 | |
c906108c SS |
6952 | break; |
6953 | case DW_TAG_enumerator: | |
38d518c9 | 6954 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6955 | built_actual_name != NULL, |
176620f1 | 6956 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
6957 | (cu->language == language_cplus |
6958 | || cu->language == language_java) | |
f6fe98ef DJ |
6959 | ? &objfile->global_psymbols |
6960 | : &objfile->static_psymbols, | |
e142c38c | 6961 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
6962 | break; |
6963 | default: | |
6964 | break; | |
6965 | } | |
5c4e30ca | 6966 | |
15d034d0 | 6967 | xfree (built_actual_name); |
c906108c SS |
6968 | } |
6969 | ||
5c4e30ca DC |
6970 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6971 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6972 | the name of the enclosing namespace. */ | |
91c24f0a | 6973 | |
72bf9492 DJ |
6974 | static void |
6975 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6976 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 6977 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 6978 | { |
72bf9492 | 6979 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6980 | |
72bf9492 | 6981 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6982 | |
6983 | /* Now scan partial symbols in that namespace. */ | |
6984 | ||
91c24f0a | 6985 | if (pdi->has_children) |
cdc07690 | 6986 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
6987 | } |
6988 | ||
5d7cb8df JK |
6989 | /* Read a partial die corresponding to a Fortran module. */ |
6990 | ||
6991 | static void | |
6992 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 6993 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 6994 | { |
530e8392 KB |
6995 | /* Add a symbol for the namespace. */ |
6996 | ||
6997 | add_partial_symbol (pdi, cu); | |
6998 | ||
f55ee35c | 6999 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7000 | |
7001 | if (pdi->has_children) | |
cdc07690 | 7002 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7003 | } |
7004 | ||
bc30ff58 JB |
7005 | /* Read a partial die corresponding to a subprogram and create a partial |
7006 | symbol for that subprogram. When the CU language allows it, this | |
7007 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7008 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7009 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7010 | and highest PC values found in PDI. | |
6e70227d | 7011 | |
cdc07690 YQ |
7012 | PDI may also be a lexical block, in which case we simply search |
7013 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7014 | Again, this is only performed when the CU language allows this |
7015 | type of definitions. */ | |
7016 | ||
7017 | static void | |
7018 | add_partial_subprogram (struct partial_die_info *pdi, | |
7019 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7020 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7021 | { |
7022 | if (pdi->tag == DW_TAG_subprogram) | |
7023 | { | |
7024 | if (pdi->has_pc_info) | |
7025 | { | |
7026 | if (pdi->lowpc < *lowpc) | |
7027 | *lowpc = pdi->lowpc; | |
7028 | if (pdi->highpc > *highpc) | |
7029 | *highpc = pdi->highpc; | |
cdc07690 | 7030 | if (set_addrmap) |
5734ee8b DJ |
7031 | { |
7032 | CORE_ADDR baseaddr; | |
7033 | struct objfile *objfile = cu->objfile; | |
7034 | ||
7035 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7036 | SECT_OFF_TEXT (objfile)); | |
7037 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
7038 | pdi->lowpc + baseaddr, |
7039 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 7040 | cu->per_cu->v.psymtab); |
5734ee8b | 7041 | } |
481860b3 GB |
7042 | } |
7043 | ||
7044 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7045 | { | |
bc30ff58 | 7046 | if (!pdi->is_declaration) |
e8d05480 JB |
7047 | /* Ignore subprogram DIEs that do not have a name, they are |
7048 | illegal. Do not emit a complaint at this point, we will | |
7049 | do so when we convert this psymtab into a symtab. */ | |
7050 | if (pdi->name) | |
7051 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7052 | } |
7053 | } | |
6e70227d | 7054 | |
bc30ff58 JB |
7055 | if (! pdi->has_children) |
7056 | return; | |
7057 | ||
7058 | if (cu->language == language_ada) | |
7059 | { | |
7060 | pdi = pdi->die_child; | |
7061 | while (pdi != NULL) | |
7062 | { | |
7063 | fixup_partial_die (pdi, cu); | |
7064 | if (pdi->tag == DW_TAG_subprogram | |
7065 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7066 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7067 | pdi = pdi->die_sibling; |
7068 | } | |
7069 | } | |
7070 | } | |
7071 | ||
91c24f0a DC |
7072 | /* Read a partial die corresponding to an enumeration type. */ |
7073 | ||
72bf9492 DJ |
7074 | static void |
7075 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7076 | struct dwarf2_cu *cu) | |
91c24f0a | 7077 | { |
72bf9492 | 7078 | struct partial_die_info *pdi; |
91c24f0a DC |
7079 | |
7080 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7081 | add_partial_symbol (enum_pdi, cu); |
7082 | ||
7083 | pdi = enum_pdi->die_child; | |
7084 | while (pdi) | |
91c24f0a | 7085 | { |
72bf9492 | 7086 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7087 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7088 | else |
72bf9492 DJ |
7089 | add_partial_symbol (pdi, cu); |
7090 | pdi = pdi->die_sibling; | |
91c24f0a | 7091 | } |
91c24f0a DC |
7092 | } |
7093 | ||
6caca83c CC |
7094 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7095 | ||
7096 | static unsigned int | |
d521ce57 | 7097 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7098 | { |
7099 | unsigned int bytes_read; | |
7100 | ||
7101 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7102 | } | |
7103 | ||
4bb7a0a7 DJ |
7104 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7105 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7106 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7107 | the initial number. */ | |
7108 | ||
7109 | static struct abbrev_info * | |
d521ce57 | 7110 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7111 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7112 | { |
7113 | bfd *abfd = cu->objfile->obfd; | |
7114 | unsigned int abbrev_number; | |
7115 | struct abbrev_info *abbrev; | |
7116 | ||
7117 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7118 | ||
7119 | if (abbrev_number == 0) | |
7120 | return NULL; | |
7121 | ||
433df2d4 | 7122 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7123 | if (!abbrev) |
7124 | { | |
3e43a32a MS |
7125 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
7126 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
7127 | } |
7128 | ||
7129 | return abbrev; | |
7130 | } | |
7131 | ||
93311388 DE |
7132 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7133 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7134 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7135 | ||
d521ce57 TT |
7136 | static const gdb_byte * |
7137 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7138 | { |
dee91e82 | 7139 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7140 | struct abbrev_info *abbrev; |
7141 | unsigned int bytes_read; | |
7142 | ||
7143 | while (1) | |
7144 | { | |
7145 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7146 | if (abbrev == NULL) | |
7147 | return info_ptr + bytes_read; | |
7148 | else | |
dee91e82 | 7149 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7150 | } |
7151 | } | |
7152 | ||
93311388 DE |
7153 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7154 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7155 | abbrev corresponding to that skipped uleb128 should be passed in |
7156 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7157 | children. */ | |
7158 | ||
d521ce57 TT |
7159 | static const gdb_byte * |
7160 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7161 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7162 | { |
7163 | unsigned int bytes_read; | |
7164 | struct attribute attr; | |
dee91e82 DE |
7165 | bfd *abfd = reader->abfd; |
7166 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7167 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7168 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 7169 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
7170 | unsigned int form, i; |
7171 | ||
7172 | for (i = 0; i < abbrev->num_attrs; i++) | |
7173 | { | |
7174 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7175 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7176 | { | |
dee91e82 | 7177 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7178 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7179 | complaint (&symfile_complaints, |
7180 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7181 | else |
b9502d3f WN |
7182 | { |
7183 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
7184 | const gdb_byte *sibling_ptr = buffer + off; | |
7185 | ||
7186 | if (sibling_ptr < info_ptr) | |
7187 | complaint (&symfile_complaints, | |
7188 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7189 | else if (sibling_ptr > reader->buffer_end) |
7190 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7191 | else |
7192 | return sibling_ptr; | |
7193 | } | |
4bb7a0a7 DJ |
7194 | } |
7195 | ||
7196 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7197 | form = abbrev->attrs[i].form; | |
7198 | skip_attribute: | |
7199 | switch (form) | |
7200 | { | |
4bb7a0a7 | 7201 | case DW_FORM_ref_addr: |
ae411497 TT |
7202 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7203 | and later it is offset sized. */ | |
7204 | if (cu->header.version == 2) | |
7205 | info_ptr += cu->header.addr_size; | |
7206 | else | |
7207 | info_ptr += cu->header.offset_size; | |
7208 | break; | |
36586728 TT |
7209 | case DW_FORM_GNU_ref_alt: |
7210 | info_ptr += cu->header.offset_size; | |
7211 | break; | |
ae411497 | 7212 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7213 | info_ptr += cu->header.addr_size; |
7214 | break; | |
7215 | case DW_FORM_data1: | |
7216 | case DW_FORM_ref1: | |
7217 | case DW_FORM_flag: | |
7218 | info_ptr += 1; | |
7219 | break; | |
2dc7f7b3 TT |
7220 | case DW_FORM_flag_present: |
7221 | break; | |
4bb7a0a7 DJ |
7222 | case DW_FORM_data2: |
7223 | case DW_FORM_ref2: | |
7224 | info_ptr += 2; | |
7225 | break; | |
7226 | case DW_FORM_data4: | |
7227 | case DW_FORM_ref4: | |
7228 | info_ptr += 4; | |
7229 | break; | |
7230 | case DW_FORM_data8: | |
7231 | case DW_FORM_ref8: | |
55f1336d | 7232 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7233 | info_ptr += 8; |
7234 | break; | |
7235 | case DW_FORM_string: | |
9b1c24c8 | 7236 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7237 | info_ptr += bytes_read; |
7238 | break; | |
2dc7f7b3 | 7239 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7240 | case DW_FORM_strp: |
36586728 | 7241 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7242 | info_ptr += cu->header.offset_size; |
7243 | break; | |
2dc7f7b3 | 7244 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7245 | case DW_FORM_block: |
7246 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7247 | info_ptr += bytes_read; | |
7248 | break; | |
7249 | case DW_FORM_block1: | |
7250 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7251 | break; | |
7252 | case DW_FORM_block2: | |
7253 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7254 | break; | |
7255 | case DW_FORM_block4: | |
7256 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7257 | break; | |
7258 | case DW_FORM_sdata: | |
7259 | case DW_FORM_udata: | |
7260 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7261 | case DW_FORM_GNU_addr_index: |
7262 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7263 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7264 | break; |
7265 | case DW_FORM_indirect: | |
7266 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7267 | info_ptr += bytes_read; | |
7268 | /* We need to continue parsing from here, so just go back to | |
7269 | the top. */ | |
7270 | goto skip_attribute; | |
7271 | ||
7272 | default: | |
3e43a32a MS |
7273 | error (_("Dwarf Error: Cannot handle %s " |
7274 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7275 | dwarf_form_name (form), |
7276 | bfd_get_filename (abfd)); | |
7277 | } | |
7278 | } | |
7279 | ||
7280 | if (abbrev->has_children) | |
dee91e82 | 7281 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7282 | else |
7283 | return info_ptr; | |
7284 | } | |
7285 | ||
93311388 | 7286 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7287 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7288 | |
d521ce57 | 7289 | static const gdb_byte * |
dee91e82 DE |
7290 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7291 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7292 | const gdb_byte *info_ptr) |
91c24f0a DC |
7293 | { |
7294 | /* Do we know the sibling already? */ | |
72bf9492 | 7295 | |
91c24f0a DC |
7296 | if (orig_pdi->sibling) |
7297 | return orig_pdi->sibling; | |
7298 | ||
7299 | /* Are there any children to deal with? */ | |
7300 | ||
7301 | if (!orig_pdi->has_children) | |
7302 | return info_ptr; | |
7303 | ||
4bb7a0a7 | 7304 | /* Skip the children the long way. */ |
91c24f0a | 7305 | |
dee91e82 | 7306 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7307 | } |
7308 | ||
257e7a09 | 7309 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7310 | not NULL. */ |
c906108c SS |
7311 | |
7312 | static void | |
257e7a09 YQ |
7313 | dwarf2_read_symtab (struct partial_symtab *self, |
7314 | struct objfile *objfile) | |
c906108c | 7315 | { |
257e7a09 | 7316 | if (self->readin) |
c906108c | 7317 | { |
442e4d9c | 7318 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7319 | self->filename); |
442e4d9c YQ |
7320 | } |
7321 | else | |
7322 | { | |
7323 | if (info_verbose) | |
c906108c | 7324 | { |
442e4d9c | 7325 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7326 | self->filename); |
442e4d9c | 7327 | gdb_flush (gdb_stdout); |
c906108c | 7328 | } |
c906108c | 7329 | |
442e4d9c YQ |
7330 | /* Restore our global data. */ |
7331 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10b3939b | 7332 | |
442e4d9c YQ |
7333 | /* If this psymtab is constructed from a debug-only objfile, the |
7334 | has_section_at_zero flag will not necessarily be correct. We | |
7335 | can get the correct value for this flag by looking at the data | |
7336 | associated with the (presumably stripped) associated objfile. */ | |
7337 | if (objfile->separate_debug_objfile_backlink) | |
7338 | { | |
7339 | struct dwarf2_per_objfile *dpo_backlink | |
7340 | = objfile_data (objfile->separate_debug_objfile_backlink, | |
7341 | dwarf2_objfile_data_key); | |
9a619af0 | 7342 | |
442e4d9c YQ |
7343 | dwarf2_per_objfile->has_section_at_zero |
7344 | = dpo_backlink->has_section_at_zero; | |
7345 | } | |
b2ab525c | 7346 | |
442e4d9c | 7347 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7348 | |
257e7a09 | 7349 | psymtab_to_symtab_1 (self); |
c906108c | 7350 | |
442e4d9c YQ |
7351 | /* Finish up the debug error message. */ |
7352 | if (info_verbose) | |
7353 | printf_filtered (_("done.\n")); | |
c906108c | 7354 | } |
95554aad TT |
7355 | |
7356 | process_cu_includes (); | |
c906108c | 7357 | } |
9cdd5dbd DE |
7358 | \f |
7359 | /* Reading in full CUs. */ | |
c906108c | 7360 | |
10b3939b DJ |
7361 | /* Add PER_CU to the queue. */ |
7362 | ||
7363 | static void | |
95554aad TT |
7364 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7365 | enum language pretend_language) | |
10b3939b DJ |
7366 | { |
7367 | struct dwarf2_queue_item *item; | |
7368 | ||
7369 | per_cu->queued = 1; | |
7370 | item = xmalloc (sizeof (*item)); | |
7371 | item->per_cu = per_cu; | |
95554aad | 7372 | item->pretend_language = pretend_language; |
10b3939b DJ |
7373 | item->next = NULL; |
7374 | ||
7375 | if (dwarf2_queue == NULL) | |
7376 | dwarf2_queue = item; | |
7377 | else | |
7378 | dwarf2_queue_tail->next = item; | |
7379 | ||
7380 | dwarf2_queue_tail = item; | |
7381 | } | |
7382 | ||
89e63ee4 DE |
7383 | /* If PER_CU is not yet queued, add it to the queue. |
7384 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7385 | dependency. | |
0907af0c | 7386 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7387 | meaning either PER_CU is already queued or it is already loaded. |
7388 | ||
7389 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7390 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7391 | |
7392 | static int | |
89e63ee4 | 7393 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7394 | struct dwarf2_per_cu_data *per_cu, |
7395 | enum language pretend_language) | |
7396 | { | |
7397 | /* We may arrive here during partial symbol reading, if we need full | |
7398 | DIEs to process an unusual case (e.g. template arguments). Do | |
7399 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7400 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7401 | { | |
7402 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7403 | return 1; | |
7404 | return 0; | |
7405 | } | |
7406 | ||
7407 | /* Mark the dependence relation so that we don't flush PER_CU | |
7408 | too early. */ | |
89e63ee4 DE |
7409 | if (dependent_cu != NULL) |
7410 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7411 | |
7412 | /* If it's already on the queue, we have nothing to do. */ | |
7413 | if (per_cu->queued) | |
7414 | return 0; | |
7415 | ||
7416 | /* If the compilation unit is already loaded, just mark it as | |
7417 | used. */ | |
7418 | if (per_cu->cu != NULL) | |
7419 | { | |
7420 | per_cu->cu->last_used = 0; | |
7421 | return 0; | |
7422 | } | |
7423 | ||
7424 | /* Add it to the queue. */ | |
7425 | queue_comp_unit (per_cu, pretend_language); | |
7426 | ||
7427 | return 1; | |
7428 | } | |
7429 | ||
10b3939b DJ |
7430 | /* Process the queue. */ |
7431 | ||
7432 | static void | |
a0f42c21 | 7433 | process_queue (void) |
10b3939b DJ |
7434 | { |
7435 | struct dwarf2_queue_item *item, *next_item; | |
7436 | ||
45cfd468 DE |
7437 | if (dwarf2_read_debug) |
7438 | { | |
7439 | fprintf_unfiltered (gdb_stdlog, | |
7440 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7441 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7442 | } |
7443 | ||
03dd20cc DJ |
7444 | /* The queue starts out with one item, but following a DIE reference |
7445 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7446 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7447 | { | |
9291a0cd TT |
7448 | if (dwarf2_per_objfile->using_index |
7449 | ? !item->per_cu->v.quick->symtab | |
7450 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
7451 | { |
7452 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7453 | unsigned int debug_print_threshold; |
247f5c4f | 7454 | char buf[100]; |
f4dc4d17 | 7455 | |
247f5c4f | 7456 | if (per_cu->is_debug_types) |
f4dc4d17 | 7457 | { |
247f5c4f DE |
7458 | struct signatured_type *sig_type = |
7459 | (struct signatured_type *) per_cu; | |
7460 | ||
7461 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 DE |
7462 | hex_string (sig_type->signature), |
7463 | per_cu->offset.sect_off); | |
7464 | /* There can be 100s of TUs. | |
7465 | Only print them in verbose mode. */ | |
7466 | debug_print_threshold = 2; | |
f4dc4d17 | 7467 | } |
247f5c4f | 7468 | else |
73be47f5 DE |
7469 | { |
7470 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7471 | debug_print_threshold = 1; | |
7472 | } | |
247f5c4f | 7473 | |
73be47f5 | 7474 | if (dwarf2_read_debug >= debug_print_threshold) |
247f5c4f | 7475 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7476 | |
7477 | if (per_cu->is_debug_types) | |
7478 | process_full_type_unit (per_cu, item->pretend_language); | |
7479 | else | |
7480 | process_full_comp_unit (per_cu, item->pretend_language); | |
7481 | ||
73be47f5 | 7482 | if (dwarf2_read_debug >= debug_print_threshold) |
247f5c4f | 7483 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7484 | } |
10b3939b DJ |
7485 | |
7486 | item->per_cu->queued = 0; | |
7487 | next_item = item->next; | |
7488 | xfree (item); | |
7489 | } | |
7490 | ||
7491 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
7492 | |
7493 | if (dwarf2_read_debug) | |
7494 | { | |
7495 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7496 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7497 | } |
10b3939b DJ |
7498 | } |
7499 | ||
7500 | /* Free all allocated queue entries. This function only releases anything if | |
7501 | an error was thrown; if the queue was processed then it would have been | |
7502 | freed as we went along. */ | |
7503 | ||
7504 | static void | |
7505 | dwarf2_release_queue (void *dummy) | |
7506 | { | |
7507 | struct dwarf2_queue_item *item, *last; | |
7508 | ||
7509 | item = dwarf2_queue; | |
7510 | while (item) | |
7511 | { | |
7512 | /* Anything still marked queued is likely to be in an | |
7513 | inconsistent state, so discard it. */ | |
7514 | if (item->per_cu->queued) | |
7515 | { | |
7516 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7517 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7518 | item->per_cu->queued = 0; |
7519 | } | |
7520 | ||
7521 | last = item; | |
7522 | item = item->next; | |
7523 | xfree (last); | |
7524 | } | |
7525 | ||
7526 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7527 | } | |
7528 | ||
7529 | /* Read in full symbols for PST, and anything it depends on. */ | |
7530 | ||
c906108c | 7531 | static void |
fba45db2 | 7532 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7533 | { |
10b3939b | 7534 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7535 | int i; |
7536 | ||
95554aad TT |
7537 | if (pst->readin) |
7538 | return; | |
7539 | ||
aaa75496 | 7540 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7541 | if (!pst->dependencies[i]->readin |
7542 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7543 | { |
7544 | /* Inform about additional files that need to be read in. */ | |
7545 | if (info_verbose) | |
7546 | { | |
a3f17187 | 7547 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7548 | fputs_filtered (" ", gdb_stdout); |
7549 | wrap_here (""); | |
7550 | fputs_filtered ("and ", gdb_stdout); | |
7551 | wrap_here (""); | |
7552 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7553 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7554 | gdb_flush (gdb_stdout); |
7555 | } | |
7556 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7557 | } | |
7558 | ||
e38df1d0 | 7559 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
7560 | |
7561 | if (per_cu == NULL) | |
aaa75496 JB |
7562 | { |
7563 | /* It's an include file, no symbols to read for it. | |
7564 | Everything is in the parent symtab. */ | |
7565 | pst->readin = 1; | |
7566 | return; | |
7567 | } | |
c906108c | 7568 | |
a0f42c21 | 7569 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7570 | } |
7571 | ||
dee91e82 DE |
7572 | /* Trivial hash function for die_info: the hash value of a DIE |
7573 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7574 | |
dee91e82 DE |
7575 | static hashval_t |
7576 | die_hash (const void *item) | |
10b3939b | 7577 | { |
dee91e82 | 7578 | const struct die_info *die = item; |
6502dd73 | 7579 | |
dee91e82 DE |
7580 | return die->offset.sect_off; |
7581 | } | |
63d06c5c | 7582 | |
dee91e82 DE |
7583 | /* Trivial comparison function for die_info structures: two DIEs |
7584 | are equal if they have the same offset. */ | |
98bfdba5 | 7585 | |
dee91e82 DE |
7586 | static int |
7587 | die_eq (const void *item_lhs, const void *item_rhs) | |
7588 | { | |
7589 | const struct die_info *die_lhs = item_lhs; | |
7590 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 7591 | |
dee91e82 DE |
7592 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7593 | } | |
c906108c | 7594 | |
dee91e82 DE |
7595 | /* die_reader_func for load_full_comp_unit. |
7596 | This is identical to read_signatured_type_reader, | |
7597 | but is kept separate for now. */ | |
c906108c | 7598 | |
dee91e82 DE |
7599 | static void |
7600 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7601 | const gdb_byte *info_ptr, |
dee91e82 DE |
7602 | struct die_info *comp_unit_die, |
7603 | int has_children, | |
7604 | void *data) | |
7605 | { | |
7606 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 7607 | enum language *language_ptr = data; |
6caca83c | 7608 | |
dee91e82 DE |
7609 | gdb_assert (cu->die_hash == NULL); |
7610 | cu->die_hash = | |
7611 | htab_create_alloc_ex (cu->header.length / 12, | |
7612 | die_hash, | |
7613 | die_eq, | |
7614 | NULL, | |
7615 | &cu->comp_unit_obstack, | |
7616 | hashtab_obstack_allocate, | |
7617 | dummy_obstack_deallocate); | |
e142c38c | 7618 | |
dee91e82 DE |
7619 | if (has_children) |
7620 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7621 | &info_ptr, comp_unit_die); | |
7622 | cu->dies = comp_unit_die; | |
7623 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7624 | |
7625 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7626 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7627 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7628 | or we won't be able to build types correctly. |
7629 | Similarly, if we do not read the producer, we can not apply | |
7630 | producer-specific interpretation. */ | |
95554aad | 7631 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7632 | } |
10b3939b | 7633 | |
dee91e82 | 7634 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7635 | |
dee91e82 | 7636 | static void |
95554aad TT |
7637 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7638 | enum language pretend_language) | |
dee91e82 | 7639 | { |
3019eac3 | 7640 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7641 | |
f4dc4d17 DE |
7642 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7643 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7644 | } |
7645 | ||
3da10d80 KS |
7646 | /* Add a DIE to the delayed physname list. */ |
7647 | ||
7648 | static void | |
7649 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7650 | const char *name, struct die_info *die, | |
7651 | struct dwarf2_cu *cu) | |
7652 | { | |
7653 | struct delayed_method_info mi; | |
7654 | mi.type = type; | |
7655 | mi.fnfield_index = fnfield_index; | |
7656 | mi.index = index; | |
7657 | mi.name = name; | |
7658 | mi.die = die; | |
7659 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7660 | } | |
7661 | ||
7662 | /* A cleanup for freeing the delayed method list. */ | |
7663 | ||
7664 | static void | |
7665 | free_delayed_list (void *ptr) | |
7666 | { | |
7667 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7668 | if (cu->method_list != NULL) | |
7669 | { | |
7670 | VEC_free (delayed_method_info, cu->method_list); | |
7671 | cu->method_list = NULL; | |
7672 | } | |
7673 | } | |
7674 | ||
7675 | /* Compute the physnames of any methods on the CU's method list. | |
7676 | ||
7677 | The computation of method physnames is delayed in order to avoid the | |
7678 | (bad) condition that one of the method's formal parameters is of an as yet | |
7679 | incomplete type. */ | |
7680 | ||
7681 | static void | |
7682 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7683 | { | |
7684 | int i; | |
7685 | struct delayed_method_info *mi; | |
7686 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7687 | { | |
1d06ead6 | 7688 | const char *physname; |
3da10d80 KS |
7689 | struct fn_fieldlist *fn_flp |
7690 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7691 | physname = dwarf2_physname (mi->name, mi->die, cu); |
3da10d80 KS |
7692 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
7693 | } | |
7694 | } | |
7695 | ||
a766d390 DE |
7696 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7697 | and it's not clear if/how imported objects will appear. | |
7698 | To keep Go support simple until that's worked out, | |
7699 | go back through what we've read and create something usable. | |
7700 | We could do this while processing each DIE, and feels kinda cleaner, | |
7701 | but that way is more invasive. | |
7702 | This is to, for example, allow the user to type "p var" or "b main" | |
7703 | without having to specify the package name, and allow lookups | |
7704 | of module.object to work in contexts that use the expression | |
7705 | parser. */ | |
7706 | ||
7707 | static void | |
7708 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7709 | { | |
7710 | char *package_name = NULL; | |
7711 | struct pending *list; | |
7712 | int i; | |
7713 | ||
7714 | for (list = global_symbols; list != NULL; list = list->next) | |
7715 | { | |
7716 | for (i = 0; i < list->nsyms; ++i) | |
7717 | { | |
7718 | struct symbol *sym = list->symbol[i]; | |
7719 | ||
7720 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7721 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7722 | { | |
7723 | char *this_package_name = go_symbol_package_name (sym); | |
7724 | ||
7725 | if (this_package_name == NULL) | |
7726 | continue; | |
7727 | if (package_name == NULL) | |
7728 | package_name = this_package_name; | |
7729 | else | |
7730 | { | |
7731 | if (strcmp (package_name, this_package_name) != 0) | |
7732 | complaint (&symfile_complaints, | |
7733 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 7734 | (SYMBOL_SYMTAB (sym) |
05cba821 | 7735 | ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym)) |
4262abfb | 7736 | : objfile_name (cu->objfile)), |
a766d390 DE |
7737 | this_package_name, package_name); |
7738 | xfree (this_package_name); | |
7739 | } | |
7740 | } | |
7741 | } | |
7742 | } | |
7743 | ||
7744 | if (package_name != NULL) | |
7745 | { | |
7746 | struct objfile *objfile = cu->objfile; | |
34a68019 TT |
7747 | const char *saved_package_name |
7748 | = obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
7749 | package_name, | |
7750 | strlen (package_name)); | |
a766d390 | 7751 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 7752 | saved_package_name, objfile); |
a766d390 DE |
7753 | struct symbol *sym; |
7754 | ||
7755 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7756 | ||
e623cf5d | 7757 | sym = allocate_symbol (objfile); |
f85f34ed | 7758 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7759 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7760 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7761 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7762 | e.g., "main" finds the "main" module and not C's main(). */ | |
7763 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7764 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7765 | SYMBOL_TYPE (sym) = type; |
7766 | ||
7767 | add_symbol_to_list (sym, &global_symbols); | |
7768 | ||
7769 | xfree (package_name); | |
7770 | } | |
7771 | } | |
7772 | ||
95554aad TT |
7773 | /* Return the symtab for PER_CU. This works properly regardless of |
7774 | whether we're using the index or psymtabs. */ | |
7775 | ||
7776 | static struct symtab * | |
7777 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
7778 | { | |
7779 | return (dwarf2_per_objfile->using_index | |
7780 | ? per_cu->v.quick->symtab | |
7781 | : per_cu->v.psymtab->symtab); | |
7782 | } | |
7783 | ||
7784 | /* A helper function for computing the list of all symbol tables | |
7785 | included by PER_CU. */ | |
7786 | ||
7787 | static void | |
ec94af83 DE |
7788 | recursively_compute_inclusions (VEC (symtab_ptr) **result, |
7789 | htab_t all_children, htab_t all_type_symtabs, | |
f9125b6c TT |
7790 | struct dwarf2_per_cu_data *per_cu, |
7791 | struct symtab *immediate_parent) | |
95554aad TT |
7792 | { |
7793 | void **slot; | |
7794 | int ix; | |
ec94af83 | 7795 | struct symtab *symtab; |
95554aad TT |
7796 | struct dwarf2_per_cu_data *iter; |
7797 | ||
7798 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7799 | if (*slot != NULL) | |
7800 | { | |
7801 | /* This inclusion and its children have been processed. */ | |
7802 | return; | |
7803 | } | |
7804 | ||
7805 | *slot = per_cu; | |
7806 | /* Only add a CU if it has a symbol table. */ | |
ec94af83 DE |
7807 | symtab = get_symtab (per_cu); |
7808 | if (symtab != NULL) | |
7809 | { | |
7810 | /* If this is a type unit only add its symbol table if we haven't | |
7811 | seen it yet (type unit per_cu's can share symtabs). */ | |
7812 | if (per_cu->is_debug_types) | |
7813 | { | |
7814 | slot = htab_find_slot (all_type_symtabs, symtab, INSERT); | |
7815 | if (*slot == NULL) | |
7816 | { | |
7817 | *slot = symtab; | |
7818 | VEC_safe_push (symtab_ptr, *result, symtab); | |
f9125b6c TT |
7819 | if (symtab->user == NULL) |
7820 | symtab->user = immediate_parent; | |
ec94af83 DE |
7821 | } |
7822 | } | |
7823 | else | |
f9125b6c TT |
7824 | { |
7825 | VEC_safe_push (symtab_ptr, *result, symtab); | |
7826 | if (symtab->user == NULL) | |
7827 | symtab->user = immediate_parent; | |
7828 | } | |
ec94af83 | 7829 | } |
95554aad TT |
7830 | |
7831 | for (ix = 0; | |
796a7ff8 | 7832 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7833 | ++ix) |
ec94af83 DE |
7834 | { |
7835 | recursively_compute_inclusions (result, all_children, | |
f9125b6c | 7836 | all_type_symtabs, iter, symtab); |
ec94af83 | 7837 | } |
95554aad TT |
7838 | } |
7839 | ||
7840 | /* Compute the symtab 'includes' fields for the symtab related to | |
7841 | PER_CU. */ | |
7842 | ||
7843 | static void | |
7844 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
7845 | { | |
f4dc4d17 DE |
7846 | gdb_assert (! per_cu->is_debug_types); |
7847 | ||
796a7ff8 | 7848 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7849 | { |
7850 | int ix, len; | |
ec94af83 DE |
7851 | struct dwarf2_per_cu_data *per_cu_iter; |
7852 | struct symtab *symtab_iter; | |
7853 | VEC (symtab_ptr) *result_symtabs = NULL; | |
7854 | htab_t all_children, all_type_symtabs; | |
95554aad TT |
7855 | struct symtab *symtab = get_symtab (per_cu); |
7856 | ||
7857 | /* If we don't have a symtab, we can just skip this case. */ | |
7858 | if (symtab == NULL) | |
7859 | return; | |
7860 | ||
7861 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7862 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7863 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7864 | NULL, xcalloc, xfree); | |
95554aad TT |
7865 | |
7866 | for (ix = 0; | |
796a7ff8 | 7867 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7868 | ix, per_cu_iter); |
95554aad | 7869 | ++ix) |
ec94af83 DE |
7870 | { |
7871 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c TT |
7872 | all_type_symtabs, per_cu_iter, |
7873 | symtab); | |
ec94af83 | 7874 | } |
95554aad | 7875 | |
ec94af83 DE |
7876 | /* Now we have a transitive closure of all the included symtabs. */ |
7877 | len = VEC_length (symtab_ptr, result_symtabs); | |
95554aad TT |
7878 | symtab->includes |
7879 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
7880 | (len + 1) * sizeof (struct symtab *)); | |
7881 | for (ix = 0; | |
ec94af83 | 7882 | VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter); |
95554aad | 7883 | ++ix) |
ec94af83 | 7884 | symtab->includes[ix] = symtab_iter; |
95554aad TT |
7885 | symtab->includes[len] = NULL; |
7886 | ||
ec94af83 | 7887 | VEC_free (symtab_ptr, result_symtabs); |
95554aad | 7888 | htab_delete (all_children); |
ec94af83 | 7889 | htab_delete (all_type_symtabs); |
95554aad TT |
7890 | } |
7891 | } | |
7892 | ||
7893 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7894 | read. */ | |
7895 | ||
7896 | static void | |
7897 | process_cu_includes (void) | |
7898 | { | |
7899 | int ix; | |
7900 | struct dwarf2_per_cu_data *iter; | |
7901 | ||
7902 | for (ix = 0; | |
7903 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
7904 | ix, iter); | |
7905 | ++ix) | |
f4dc4d17 DE |
7906 | { |
7907 | if (! iter->is_debug_types) | |
7908 | compute_symtab_includes (iter); | |
7909 | } | |
95554aad TT |
7910 | |
7911 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
7912 | } | |
7913 | ||
9cdd5dbd | 7914 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
7915 | already been loaded into memory. */ |
7916 | ||
7917 | static void | |
95554aad TT |
7918 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7919 | enum language pretend_language) | |
10b3939b | 7920 | { |
10b3939b | 7921 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 7922 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
7923 | CORE_ADDR lowpc, highpc; |
7924 | struct symtab *symtab; | |
3da10d80 | 7925 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 7926 | CORE_ADDR baseaddr; |
4359dff1 | 7927 | struct block *static_block; |
10b3939b DJ |
7928 | |
7929 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7930 | ||
10b3939b DJ |
7931 | buildsym_init (); |
7932 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 7933 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
7934 | |
7935 | cu->list_in_scope = &file_symbols; | |
c906108c | 7936 | |
95554aad TT |
7937 | cu->language = pretend_language; |
7938 | cu->language_defn = language_def (cu->language); | |
7939 | ||
c906108c | 7940 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 7941 | process_die (cu->dies, cu); |
c906108c | 7942 | |
a766d390 DE |
7943 | /* For now fudge the Go package. */ |
7944 | if (cu->language == language_go) | |
7945 | fixup_go_packaging (cu); | |
7946 | ||
3da10d80 KS |
7947 | /* Now that we have processed all the DIEs in the CU, all the types |
7948 | should be complete, and it should now be safe to compute all of the | |
7949 | physnames. */ | |
7950 | compute_delayed_physnames (cu); | |
7951 | do_cleanups (delayed_list_cleanup); | |
7952 | ||
fae299cd DC |
7953 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
7954 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
7955 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 7956 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 7957 | |
36586728 | 7958 | static_block |
ff546935 | 7959 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1); |
4359dff1 JK |
7960 | |
7961 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
7962 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
7963 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
7964 | addrmap to help ensure it has an accurate map of pc values belonging to | |
7965 | this comp unit. */ | |
7966 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
7967 | ||
7968 | symtab = end_symtab_from_static_block (static_block, objfile, | |
7969 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 7970 | |
8be455d7 | 7971 | if (symtab != NULL) |
c906108c | 7972 | { |
df15bd07 | 7973 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 7974 | |
8be455d7 JK |
7975 | /* Set symtab language to language from DW_AT_language. If the |
7976 | compilation is from a C file generated by language preprocessors, do | |
7977 | not set the language if it was already deduced by start_subfile. */ | |
7978 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7979 | symtab->language = cu->language; | |
7980 | ||
7981 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
7982 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
7983 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
7984 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
7985 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
7986 | |
7987 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
7988 | needed, it would be wrong due to missing DW_AT_producer there. | |
7989 | ||
7990 | Still one can confuse GDB by using non-standard GCC compilation | |
7991 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
7992 | */ | |
ab260dad | 7993 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 7994 | symtab->locations_valid = 1; |
e0d00bc7 JK |
7995 | |
7996 | if (gcc_4_minor >= 5) | |
7997 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
7998 | |
7999 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 8000 | } |
9291a0cd TT |
8001 | |
8002 | if (dwarf2_per_objfile->using_index) | |
8003 | per_cu->v.quick->symtab = symtab; | |
8004 | else | |
8005 | { | |
8006 | struct partial_symtab *pst = per_cu->v.psymtab; | |
8007 | pst->symtab = symtab; | |
8008 | pst->readin = 1; | |
8009 | } | |
c906108c | 8010 | |
95554aad TT |
8011 | /* Push it for inclusion processing later. */ |
8012 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
8013 | ||
c906108c | 8014 | do_cleanups (back_to); |
f4dc4d17 | 8015 | } |
45cfd468 | 8016 | |
f4dc4d17 DE |
8017 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8018 | already been loaded into memory. */ | |
8019 | ||
8020 | static void | |
8021 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8022 | enum language pretend_language) | |
8023 | { | |
8024 | struct dwarf2_cu *cu = per_cu->cu; | |
8025 | struct objfile *objfile = per_cu->objfile; | |
8026 | struct symtab *symtab; | |
8027 | struct cleanup *back_to, *delayed_list_cleanup; | |
0186c6a7 DE |
8028 | struct signatured_type *sig_type; |
8029 | ||
8030 | gdb_assert (per_cu->is_debug_types); | |
8031 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8032 | |
8033 | buildsym_init (); | |
8034 | back_to = make_cleanup (really_free_pendings, NULL); | |
8035 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
8036 | ||
8037 | cu->list_in_scope = &file_symbols; | |
8038 | ||
8039 | cu->language = pretend_language; | |
8040 | cu->language_defn = language_def (cu->language); | |
8041 | ||
8042 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8043 | process_die (cu->dies, cu); | |
8044 | ||
8045 | /* For now fudge the Go package. */ | |
8046 | if (cu->language == language_go) | |
8047 | fixup_go_packaging (cu); | |
8048 | ||
8049 | /* Now that we have processed all the DIEs in the CU, all the types | |
8050 | should be complete, and it should now be safe to compute all of the | |
8051 | physnames. */ | |
8052 | compute_delayed_physnames (cu); | |
8053 | do_cleanups (delayed_list_cleanup); | |
8054 | ||
8055 | /* TUs share symbol tables. | |
8056 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8057 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8058 | this TU's symbols to the existing symtab. */ | |
0186c6a7 | 8059 | if (sig_type->type_unit_group->primary_symtab == NULL) |
45cfd468 | 8060 | { |
f4dc4d17 | 8061 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
0186c6a7 | 8062 | sig_type->type_unit_group->primary_symtab = symtab; |
f4dc4d17 DE |
8063 | |
8064 | if (symtab != NULL) | |
8065 | { | |
8066 | /* Set symtab language to language from DW_AT_language. If the | |
8067 | compilation is from a C file generated by language preprocessors, | |
8068 | do not set the language if it was already deduced by | |
8069 | start_subfile. */ | |
8070 | if (!(cu->language == language_c && symtab->language != language_c)) | |
8071 | symtab->language = cu->language; | |
8072 | } | |
8073 | } | |
8074 | else | |
8075 | { | |
8076 | augment_type_symtab (objfile, | |
0186c6a7 DE |
8077 | sig_type->type_unit_group->primary_symtab); |
8078 | symtab = sig_type->type_unit_group->primary_symtab; | |
f4dc4d17 DE |
8079 | } |
8080 | ||
8081 | if (dwarf2_per_objfile->using_index) | |
8082 | per_cu->v.quick->symtab = symtab; | |
8083 | else | |
8084 | { | |
8085 | struct partial_symtab *pst = per_cu->v.psymtab; | |
8086 | pst->symtab = symtab; | |
8087 | pst->readin = 1; | |
45cfd468 | 8088 | } |
f4dc4d17 DE |
8089 | |
8090 | do_cleanups (back_to); | |
c906108c SS |
8091 | } |
8092 | ||
95554aad TT |
8093 | /* Process an imported unit DIE. */ |
8094 | ||
8095 | static void | |
8096 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8097 | { | |
8098 | struct attribute *attr; | |
8099 | ||
f4dc4d17 DE |
8100 | /* For now we don't handle imported units in type units. */ |
8101 | if (cu->per_cu->is_debug_types) | |
8102 | { | |
8103 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8104 | " supported in type units [in module %s]"), | |
4262abfb | 8105 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8106 | } |
8107 | ||
95554aad TT |
8108 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8109 | if (attr != NULL) | |
8110 | { | |
8111 | struct dwarf2_per_cu_data *per_cu; | |
8112 | struct symtab *imported_symtab; | |
8113 | sect_offset offset; | |
36586728 | 8114 | int is_dwz; |
95554aad TT |
8115 | |
8116 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
8117 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
8118 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 8119 | |
69d751e3 | 8120 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8121 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8122 | load_full_comp_unit (per_cu, cu->language); | |
8123 | ||
796a7ff8 | 8124 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8125 | per_cu); |
8126 | } | |
8127 | } | |
8128 | ||
adde2bff DE |
8129 | /* Reset the in_process bit of a die. */ |
8130 | ||
8131 | static void | |
8132 | reset_die_in_process (void *arg) | |
8133 | { | |
8134 | struct die_info *die = arg; | |
8c3cb9fa | 8135 | |
adde2bff DE |
8136 | die->in_process = 0; |
8137 | } | |
8138 | ||
c906108c SS |
8139 | /* Process a die and its children. */ |
8140 | ||
8141 | static void | |
e7c27a73 | 8142 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8143 | { |
adde2bff DE |
8144 | struct cleanup *in_process; |
8145 | ||
8146 | /* We should only be processing those not already in process. */ | |
8147 | gdb_assert (!die->in_process); | |
8148 | ||
8149 | die->in_process = 1; | |
8150 | in_process = make_cleanup (reset_die_in_process,die); | |
8151 | ||
c906108c SS |
8152 | switch (die->tag) |
8153 | { | |
8154 | case DW_TAG_padding: | |
8155 | break; | |
8156 | case DW_TAG_compile_unit: | |
95554aad | 8157 | case DW_TAG_partial_unit: |
e7c27a73 | 8158 | read_file_scope (die, cu); |
c906108c | 8159 | break; |
348e048f DE |
8160 | case DW_TAG_type_unit: |
8161 | read_type_unit_scope (die, cu); | |
8162 | break; | |
c906108c | 8163 | case DW_TAG_subprogram: |
c906108c | 8164 | case DW_TAG_inlined_subroutine: |
edb3359d | 8165 | read_func_scope (die, cu); |
c906108c SS |
8166 | break; |
8167 | case DW_TAG_lexical_block: | |
14898363 L |
8168 | case DW_TAG_try_block: |
8169 | case DW_TAG_catch_block: | |
e7c27a73 | 8170 | read_lexical_block_scope (die, cu); |
c906108c | 8171 | break; |
96408a79 SA |
8172 | case DW_TAG_GNU_call_site: |
8173 | read_call_site_scope (die, cu); | |
8174 | break; | |
c906108c | 8175 | case DW_TAG_class_type: |
680b30c7 | 8176 | case DW_TAG_interface_type: |
c906108c SS |
8177 | case DW_TAG_structure_type: |
8178 | case DW_TAG_union_type: | |
134d01f1 | 8179 | process_structure_scope (die, cu); |
c906108c SS |
8180 | break; |
8181 | case DW_TAG_enumeration_type: | |
134d01f1 | 8182 | process_enumeration_scope (die, cu); |
c906108c | 8183 | break; |
134d01f1 | 8184 | |
f792889a DJ |
8185 | /* These dies have a type, but processing them does not create |
8186 | a symbol or recurse to process the children. Therefore we can | |
8187 | read them on-demand through read_type_die. */ | |
c906108c | 8188 | case DW_TAG_subroutine_type: |
72019c9c | 8189 | case DW_TAG_set_type: |
c906108c | 8190 | case DW_TAG_array_type: |
c906108c | 8191 | case DW_TAG_pointer_type: |
c906108c | 8192 | case DW_TAG_ptr_to_member_type: |
c906108c | 8193 | case DW_TAG_reference_type: |
c906108c | 8194 | case DW_TAG_string_type: |
c906108c | 8195 | break; |
134d01f1 | 8196 | |
c906108c | 8197 | case DW_TAG_base_type: |
a02abb62 | 8198 | case DW_TAG_subrange_type: |
cb249c71 | 8199 | case DW_TAG_typedef: |
134d01f1 DJ |
8200 | /* Add a typedef symbol for the type definition, if it has a |
8201 | DW_AT_name. */ | |
f792889a | 8202 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8203 | break; |
c906108c | 8204 | case DW_TAG_common_block: |
e7c27a73 | 8205 | read_common_block (die, cu); |
c906108c SS |
8206 | break; |
8207 | case DW_TAG_common_inclusion: | |
8208 | break; | |
d9fa45fe | 8209 | case DW_TAG_namespace: |
4d4ec4e5 | 8210 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8211 | read_namespace (die, cu); |
d9fa45fe | 8212 | break; |
5d7cb8df | 8213 | case DW_TAG_module: |
4d4ec4e5 | 8214 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8215 | read_module (die, cu); |
8216 | break; | |
d9fa45fe | 8217 | case DW_TAG_imported_declaration: |
74921315 KS |
8218 | cu->processing_has_namespace_info = 1; |
8219 | if (read_namespace_alias (die, cu)) | |
8220 | break; | |
8221 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8222 | case DW_TAG_imported_module: |
4d4ec4e5 | 8223 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8224 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8225 | || cu->language != language_fortran)) | |
8226 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8227 | dwarf_tag_name (die->tag)); | |
8228 | read_import_statement (die, cu); | |
d9fa45fe | 8229 | break; |
95554aad TT |
8230 | |
8231 | case DW_TAG_imported_unit: | |
8232 | process_imported_unit_die (die, cu); | |
8233 | break; | |
8234 | ||
c906108c | 8235 | default: |
e7c27a73 | 8236 | new_symbol (die, NULL, cu); |
c906108c SS |
8237 | break; |
8238 | } | |
adde2bff DE |
8239 | |
8240 | do_cleanups (in_process); | |
c906108c | 8241 | } |
ca69b9e6 DE |
8242 | \f |
8243 | /* DWARF name computation. */ | |
c906108c | 8244 | |
94af9270 KS |
8245 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8246 | needs to have the name of the scope prepended to the name listed in the | |
8247 | die. */ | |
8248 | ||
8249 | static int | |
8250 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8251 | { | |
1c809c68 TT |
8252 | struct attribute *attr; |
8253 | ||
94af9270 KS |
8254 | switch (die->tag) |
8255 | { | |
8256 | case DW_TAG_namespace: | |
8257 | case DW_TAG_typedef: | |
8258 | case DW_TAG_class_type: | |
8259 | case DW_TAG_interface_type: | |
8260 | case DW_TAG_structure_type: | |
8261 | case DW_TAG_union_type: | |
8262 | case DW_TAG_enumeration_type: | |
8263 | case DW_TAG_enumerator: | |
8264 | case DW_TAG_subprogram: | |
8265 | case DW_TAG_member: | |
74921315 | 8266 | case DW_TAG_imported_declaration: |
94af9270 KS |
8267 | return 1; |
8268 | ||
8269 | case DW_TAG_variable: | |
c2b0a229 | 8270 | case DW_TAG_constant: |
94af9270 KS |
8271 | /* We only need to prefix "globally" visible variables. These include |
8272 | any variable marked with DW_AT_external or any variable that | |
8273 | lives in a namespace. [Variables in anonymous namespaces | |
8274 | require prefixing, but they are not DW_AT_external.] */ | |
8275 | ||
8276 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8277 | { | |
8278 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8279 | |
94af9270 KS |
8280 | return die_needs_namespace (die_specification (die, &spec_cu), |
8281 | spec_cu); | |
8282 | } | |
8283 | ||
1c809c68 | 8284 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8285 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8286 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8287 | return 0; |
8288 | /* A variable in a lexical block of some kind does not need a | |
8289 | namespace, even though in C++ such variables may be external | |
8290 | and have a mangled name. */ | |
8291 | if (die->parent->tag == DW_TAG_lexical_block | |
8292 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8293 | || die->parent->tag == DW_TAG_catch_block |
8294 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8295 | return 0; |
8296 | return 1; | |
94af9270 KS |
8297 | |
8298 | default: | |
8299 | return 0; | |
8300 | } | |
8301 | } | |
8302 | ||
98bfdba5 PA |
8303 | /* Retrieve the last character from a mem_file. */ |
8304 | ||
8305 | static void | |
8306 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
8307 | { | |
8308 | char *last_char_p = (char *) object; | |
8309 | ||
8310 | if (length > 0) | |
8311 | *last_char_p = buffer[length - 1]; | |
8312 | } | |
8313 | ||
94af9270 | 8314 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
8315 | compute the physname for the object, which include a method's: |
8316 | - formal parameters (C++/Java), | |
8317 | - receiver type (Go), | |
8318 | - return type (Java). | |
8319 | ||
8320 | The term "physname" is a bit confusing. | |
8321 | For C++, for example, it is the demangled name. | |
8322 | For Go, for example, it's the mangled name. | |
94af9270 | 8323 | |
af6b7be1 JB |
8324 | For Ada, return the DIE's linkage name rather than the fully qualified |
8325 | name. PHYSNAME is ignored.. | |
8326 | ||
94af9270 KS |
8327 | The result is allocated on the objfile_obstack and canonicalized. */ |
8328 | ||
8329 | static const char * | |
15d034d0 TT |
8330 | dwarf2_compute_name (const char *name, |
8331 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8332 | int physname) |
8333 | { | |
bb5ed363 DE |
8334 | struct objfile *objfile = cu->objfile; |
8335 | ||
94af9270 KS |
8336 | if (name == NULL) |
8337 | name = dwarf2_name (die, cu); | |
8338 | ||
f55ee35c JK |
8339 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
8340 | compute it by typename_concat inside GDB. */ | |
8341 | if (cu->language == language_ada | |
8342 | || (cu->language == language_fortran && physname)) | |
8343 | { | |
8344 | /* For Ada unit, we prefer the linkage name over the name, as | |
8345 | the former contains the exported name, which the user expects | |
8346 | to be able to reference. Ideally, we want the user to be able | |
8347 | to reference this entity using either natural or linkage name, | |
8348 | but we haven't started looking at this enhancement yet. */ | |
8349 | struct attribute *attr; | |
8350 | ||
8351 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8352 | if (attr == NULL) | |
8353 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8354 | if (attr && DW_STRING (attr)) | |
8355 | return DW_STRING (attr); | |
8356 | } | |
8357 | ||
94af9270 KS |
8358 | /* These are the only languages we know how to qualify names in. */ |
8359 | if (name != NULL | |
f55ee35c JK |
8360 | && (cu->language == language_cplus || cu->language == language_java |
8361 | || cu->language == language_fortran)) | |
94af9270 KS |
8362 | { |
8363 | if (die_needs_namespace (die, cu)) | |
8364 | { | |
8365 | long length; | |
0d5cff50 | 8366 | const char *prefix; |
94af9270 | 8367 | struct ui_file *buf; |
34a68019 TT |
8368 | char *intermediate_name; |
8369 | const char *canonical_name = NULL; | |
94af9270 KS |
8370 | |
8371 | prefix = determine_prefix (die, cu); | |
8372 | buf = mem_fileopen (); | |
8373 | if (*prefix != '\0') | |
8374 | { | |
f55ee35c JK |
8375 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8376 | physname, cu); | |
9a619af0 | 8377 | |
94af9270 KS |
8378 | fputs_unfiltered (prefixed_name, buf); |
8379 | xfree (prefixed_name); | |
8380 | } | |
8381 | else | |
62d5b8da | 8382 | fputs_unfiltered (name, buf); |
94af9270 | 8383 | |
98bfdba5 PA |
8384 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8385 | as children with DW_TAG_template_type_param or | |
8386 | DW_TAG_value_type_param. If the latter, add them to the name | |
8387 | here. If the name already has template parameters, then | |
8388 | skip this step; some versions of GCC emit both, and | |
8389 | it is more efficient to use the pre-computed name. | |
8390 | ||
8391 | Something to keep in mind about this process: it is very | |
8392 | unlikely, or in some cases downright impossible, to produce | |
8393 | something that will match the mangled name of a function. | |
8394 | If the definition of the function has the same debug info, | |
8395 | we should be able to match up with it anyway. But fallbacks | |
8396 | using the minimal symbol, for instance to find a method | |
8397 | implemented in a stripped copy of libstdc++, will not work. | |
8398 | If we do not have debug info for the definition, we will have to | |
8399 | match them up some other way. | |
8400 | ||
8401 | When we do name matching there is a related problem with function | |
8402 | templates; two instantiated function templates are allowed to | |
8403 | differ only by their return types, which we do not add here. */ | |
8404 | ||
8405 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8406 | { | |
8407 | struct attribute *attr; | |
8408 | struct die_info *child; | |
8409 | int first = 1; | |
8410 | ||
8411 | die->building_fullname = 1; | |
8412 | ||
8413 | for (child = die->child; child != NULL; child = child->sibling) | |
8414 | { | |
8415 | struct type *type; | |
12df843f | 8416 | LONGEST value; |
d521ce57 | 8417 | const gdb_byte *bytes; |
98bfdba5 PA |
8418 | struct dwarf2_locexpr_baton *baton; |
8419 | struct value *v; | |
8420 | ||
8421 | if (child->tag != DW_TAG_template_type_param | |
8422 | && child->tag != DW_TAG_template_value_param) | |
8423 | continue; | |
8424 | ||
8425 | if (first) | |
8426 | { | |
8427 | fputs_unfiltered ("<", buf); | |
8428 | first = 0; | |
8429 | } | |
8430 | else | |
8431 | fputs_unfiltered (", ", buf); | |
8432 | ||
8433 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8434 | if (attr == NULL) | |
8435 | { | |
8436 | complaint (&symfile_complaints, | |
8437 | _("template parameter missing DW_AT_type")); | |
8438 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8439 | continue; | |
8440 | } | |
8441 | type = die_type (child, cu); | |
8442 | ||
8443 | if (child->tag == DW_TAG_template_type_param) | |
8444 | { | |
79d43c61 | 8445 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8446 | continue; |
8447 | } | |
8448 | ||
8449 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8450 | if (attr == NULL) | |
8451 | { | |
8452 | complaint (&symfile_complaints, | |
3e43a32a MS |
8453 | _("template parameter missing " |
8454 | "DW_AT_const_value")); | |
98bfdba5 PA |
8455 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8456 | continue; | |
8457 | } | |
8458 | ||
8459 | dwarf2_const_value_attr (attr, type, name, | |
8460 | &cu->comp_unit_obstack, cu, | |
8461 | &value, &bytes, &baton); | |
8462 | ||
8463 | if (TYPE_NOSIGN (type)) | |
8464 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8465 | changed, this can use value_print instead. */ | |
8466 | c_printchar (value, type, buf); | |
8467 | else | |
8468 | { | |
8469 | struct value_print_options opts; | |
8470 | ||
8471 | if (baton != NULL) | |
8472 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8473 | baton->data, | |
8474 | baton->size, | |
8475 | baton->per_cu); | |
8476 | else if (bytes != NULL) | |
8477 | { | |
8478 | v = allocate_value (type); | |
8479 | memcpy (value_contents_writeable (v), bytes, | |
8480 | TYPE_LENGTH (type)); | |
8481 | } | |
8482 | else | |
8483 | v = value_from_longest (type, value); | |
8484 | ||
3e43a32a MS |
8485 | /* Specify decimal so that we do not depend on |
8486 | the radix. */ | |
98bfdba5 PA |
8487 | get_formatted_print_options (&opts, 'd'); |
8488 | opts.raw = 1; | |
8489 | value_print (v, buf, &opts); | |
8490 | release_value (v); | |
8491 | value_free (v); | |
8492 | } | |
8493 | } | |
8494 | ||
8495 | die->building_fullname = 0; | |
8496 | ||
8497 | if (!first) | |
8498 | { | |
8499 | /* Close the argument list, with a space if necessary | |
8500 | (nested templates). */ | |
8501 | char last_char = '\0'; | |
8502 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8503 | if (last_char == '>') | |
8504 | fputs_unfiltered (" >", buf); | |
8505 | else | |
8506 | fputs_unfiltered (">", buf); | |
8507 | } | |
8508 | } | |
8509 | ||
94af9270 KS |
8510 | /* For Java and C++ methods, append formal parameter type |
8511 | information, if PHYSNAME. */ | |
6e70227d | 8512 | |
94af9270 KS |
8513 | if (physname && die->tag == DW_TAG_subprogram |
8514 | && (cu->language == language_cplus | |
8515 | || cu->language == language_java)) | |
8516 | { | |
8517 | struct type *type = read_type_die (die, cu); | |
8518 | ||
79d43c61 TT |
8519 | c_type_print_args (type, buf, 1, cu->language, |
8520 | &type_print_raw_options); | |
94af9270 KS |
8521 | |
8522 | if (cu->language == language_java) | |
8523 | { | |
8524 | /* For java, we must append the return type to method | |
0963b4bd | 8525 | names. */ |
94af9270 KS |
8526 | if (die->tag == DW_TAG_subprogram) |
8527 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 8528 | 0, 0, &type_print_raw_options); |
94af9270 KS |
8529 | } |
8530 | else if (cu->language == language_cplus) | |
8531 | { | |
60430eff DJ |
8532 | /* Assume that an artificial first parameter is |
8533 | "this", but do not crash if it is not. RealView | |
8534 | marks unnamed (and thus unused) parameters as | |
8535 | artificial; there is no way to differentiate | |
8536 | the two cases. */ | |
94af9270 KS |
8537 | if (TYPE_NFIELDS (type) > 0 |
8538 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8539 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8540 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8541 | 0)))) | |
94af9270 KS |
8542 | fputs_unfiltered (" const", buf); |
8543 | } | |
8544 | } | |
8545 | ||
34a68019 | 8546 | intermediate_name = ui_file_xstrdup (buf, &length); |
94af9270 KS |
8547 | ui_file_delete (buf); |
8548 | ||
8549 | if (cu->language == language_cplus) | |
34a68019 TT |
8550 | canonical_name |
8551 | = dwarf2_canonicalize_name (intermediate_name, cu, | |
8552 | &objfile->per_bfd->storage_obstack); | |
8553 | ||
8554 | /* If we only computed INTERMEDIATE_NAME, or if | |
8555 | INTERMEDIATE_NAME is already canonical, then we need to | |
8556 | copy it to the appropriate obstack. */ | |
8557 | if (canonical_name == NULL || canonical_name == intermediate_name) | |
8558 | name = obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
8559 | intermediate_name, | |
8560 | strlen (intermediate_name)); | |
8561 | else | |
8562 | name = canonical_name; | |
9a619af0 | 8563 | |
34a68019 | 8564 | xfree (intermediate_name); |
94af9270 KS |
8565 | } |
8566 | } | |
8567 | ||
8568 | return name; | |
8569 | } | |
8570 | ||
0114d602 DJ |
8571 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8572 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 8573 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
8574 | not have a name. NAME may either be from a previous call to |
8575 | dwarf2_name or NULL. | |
8576 | ||
0963b4bd | 8577 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
8578 | |
8579 | static const char * | |
15d034d0 | 8580 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8581 | { |
94af9270 KS |
8582 | return dwarf2_compute_name (name, die, cu, 0); |
8583 | } | |
0114d602 | 8584 | |
94af9270 KS |
8585 | /* Construct a physname for the given DIE in CU. NAME may either be |
8586 | from a previous call to dwarf2_name or NULL. The result will be | |
8587 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8588 | name. | |
0114d602 | 8589 | |
94af9270 | 8590 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 8591 | |
94af9270 | 8592 | static const char * |
15d034d0 | 8593 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8594 | { |
bb5ed363 | 8595 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8596 | struct attribute *attr; |
8597 | const char *retval, *mangled = NULL, *canon = NULL; | |
8598 | struct cleanup *back_to; | |
8599 | int need_copy = 1; | |
8600 | ||
8601 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8602 | on its own. */ | |
8603 | if (!die_needs_namespace (die, cu)) | |
8604 | return dwarf2_compute_name (name, die, cu, 1); | |
8605 | ||
8606 | back_to = make_cleanup (null_cleanup, NULL); | |
8607 | ||
8608 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8609 | if (!attr) | |
8610 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8611 | ||
8612 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
8613 | has computed. */ | |
8614 | if (attr && DW_STRING (attr)) | |
8615 | { | |
8616 | char *demangled; | |
8617 | ||
8618 | mangled = DW_STRING (attr); | |
8619 | ||
8620 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
8621 | type. It is easier for GDB users to search for such functions as | |
8622 | `name(params)' than `long name(params)'. In such case the minimal | |
8623 | symbol names do not match the full symbol names but for template | |
8624 | functions there is never a need to look up their definition from their | |
8625 | declaration so the only disadvantage remains the minimal symbol | |
8626 | variant `long name(params)' does not have the proper inferior type. | |
8627 | */ | |
8628 | ||
a766d390 DE |
8629 | if (cu->language == language_go) |
8630 | { | |
8631 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8632 | new_symbol_full assumes we return the mangled name. | |
8633 | This just undoes that lie until things are cleaned up. */ | |
8634 | demangled = NULL; | |
8635 | } | |
8636 | else | |
8637 | { | |
8de20a37 TT |
8638 | demangled = gdb_demangle (mangled, |
8639 | (DMGL_PARAMS | DMGL_ANSI | |
8640 | | (cu->language == language_java | |
8641 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
8642 | : DMGL_RET_DROP))); | |
a766d390 | 8643 | } |
900e11f9 JK |
8644 | if (demangled) |
8645 | { | |
8646 | make_cleanup (xfree, demangled); | |
8647 | canon = demangled; | |
8648 | } | |
8649 | else | |
8650 | { | |
8651 | canon = mangled; | |
8652 | need_copy = 0; | |
8653 | } | |
8654 | } | |
8655 | ||
8656 | if (canon == NULL || check_physname) | |
8657 | { | |
8658 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8659 | ||
8660 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8661 | { | |
8662 | /* It may not mean a bug in GDB. The compiler could also | |
8663 | compute DW_AT_linkage_name incorrectly. But in such case | |
8664 | GDB would need to be bug-to-bug compatible. */ | |
8665 | ||
8666 | complaint (&symfile_complaints, | |
8667 | _("Computed physname <%s> does not match demangled <%s> " | |
8668 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8669 | physname, canon, mangled, die->offset.sect_off, |
8670 | objfile_name (objfile)); | |
900e11f9 JK |
8671 | |
8672 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8673 | is available here - over computed PHYSNAME. It is safer | |
8674 | against both buggy GDB and buggy compilers. */ | |
8675 | ||
8676 | retval = canon; | |
8677 | } | |
8678 | else | |
8679 | { | |
8680 | retval = physname; | |
8681 | need_copy = 0; | |
8682 | } | |
8683 | } | |
8684 | else | |
8685 | retval = canon; | |
8686 | ||
8687 | if (need_copy) | |
34a68019 TT |
8688 | retval = obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8689 | retval, strlen (retval)); | |
900e11f9 JK |
8690 | |
8691 | do_cleanups (back_to); | |
8692 | return retval; | |
0114d602 DJ |
8693 | } |
8694 | ||
74921315 KS |
8695 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
8696 | a new symbol for it. | |
8697 | ||
8698 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
8699 | ||
8700 | static int | |
8701 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
8702 | { | |
8703 | struct attribute *attr; | |
8704 | ||
8705 | /* If the die does not have a name, this is not a namespace | |
8706 | alias. */ | |
8707 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8708 | if (attr != NULL) | |
8709 | { | |
8710 | int num; | |
8711 | struct die_info *d = die; | |
8712 | struct dwarf2_cu *imported_cu = cu; | |
8713 | ||
8714 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
8715 | keep inspecting DIEs until we hit the underlying import. */ | |
8716 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
8717 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
8718 | { | |
8719 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
8720 | if (attr == NULL) | |
8721 | break; | |
8722 | ||
8723 | d = follow_die_ref (d, attr, &imported_cu); | |
8724 | if (d->tag != DW_TAG_imported_declaration) | |
8725 | break; | |
8726 | } | |
8727 | ||
8728 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
8729 | { | |
8730 | complaint (&symfile_complaints, | |
8731 | _("DIE at 0x%x has too many recursively imported " | |
8732 | "declarations"), d->offset.sect_off); | |
8733 | return 0; | |
8734 | } | |
8735 | ||
8736 | if (attr != NULL) | |
8737 | { | |
8738 | struct type *type; | |
8739 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
8740 | ||
8741 | type = get_die_type_at_offset (offset, cu->per_cu); | |
8742 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
8743 | { | |
8744 | /* This declaration is a global namespace alias. Add | |
8745 | a symbol for it whose type is the aliased namespace. */ | |
8746 | new_symbol (die, type, cu); | |
8747 | return 1; | |
8748 | } | |
8749 | } | |
8750 | } | |
8751 | ||
8752 | return 0; | |
8753 | } | |
8754 | ||
27aa8d6a SW |
8755 | /* Read the import statement specified by the given die and record it. */ |
8756 | ||
8757 | static void | |
8758 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8759 | { | |
bb5ed363 | 8760 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8761 | struct attribute *import_attr; |
32019081 | 8762 | struct die_info *imported_die, *child_die; |
de4affc9 | 8763 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8764 | const char *imported_name; |
794684b6 | 8765 | const char *imported_name_prefix; |
13387711 SW |
8766 | const char *canonical_name; |
8767 | const char *import_alias; | |
8768 | const char *imported_declaration = NULL; | |
794684b6 | 8769 | const char *import_prefix; |
32019081 JK |
8770 | VEC (const_char_ptr) *excludes = NULL; |
8771 | struct cleanup *cleanups; | |
13387711 | 8772 | |
27aa8d6a SW |
8773 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8774 | if (import_attr == NULL) | |
8775 | { | |
8776 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8777 | dwarf_tag_name (die->tag)); | |
8778 | return; | |
8779 | } | |
8780 | ||
de4affc9 CC |
8781 | imported_cu = cu; |
8782 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8783 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8784 | if (imported_name == NULL) |
8785 | { | |
8786 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8787 | ||
8788 | The import in the following code: | |
8789 | namespace A | |
8790 | { | |
8791 | typedef int B; | |
8792 | } | |
8793 | ||
8794 | int main () | |
8795 | { | |
8796 | using A::B; | |
8797 | B b; | |
8798 | return b; | |
8799 | } | |
8800 | ||
8801 | ... | |
8802 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8803 | <52> DW_AT_decl_file : 1 | |
8804 | <53> DW_AT_decl_line : 6 | |
8805 | <54> DW_AT_import : <0x75> | |
8806 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8807 | <59> DW_AT_name : B | |
8808 | <5b> DW_AT_decl_file : 1 | |
8809 | <5c> DW_AT_decl_line : 2 | |
8810 | <5d> DW_AT_type : <0x6e> | |
8811 | ... | |
8812 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8813 | <76> DW_AT_byte_size : 4 | |
8814 | <77> DW_AT_encoding : 5 (signed) | |
8815 | ||
8816 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8817 | This case will be ignored until the gcc bug is fixed. */ | |
8818 | return; | |
8819 | } | |
8820 | ||
82856980 SW |
8821 | /* Figure out the local name after import. */ |
8822 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8823 | |
794684b6 SW |
8824 | /* Figure out where the statement is being imported to. */ |
8825 | import_prefix = determine_prefix (die, cu); | |
8826 | ||
8827 | /* Figure out what the scope of the imported die is and prepend it | |
8828 | to the name of the imported die. */ | |
de4affc9 | 8829 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8830 | |
f55ee35c JK |
8831 | if (imported_die->tag != DW_TAG_namespace |
8832 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8833 | { |
13387711 SW |
8834 | imported_declaration = imported_name; |
8835 | canonical_name = imported_name_prefix; | |
794684b6 | 8836 | } |
13387711 | 8837 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 TT |
8838 | canonical_name = obconcat (&objfile->objfile_obstack, |
8839 | imported_name_prefix, "::", imported_name, | |
8840 | (char *) NULL); | |
13387711 SW |
8841 | else |
8842 | canonical_name = imported_name; | |
794684b6 | 8843 | |
32019081 JK |
8844 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8845 | ||
8846 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8847 | for (child_die = die->child; child_die && child_die->tag; | |
8848 | child_die = sibling_die (child_die)) | |
8849 | { | |
8850 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8851 | represented by an imported module entry with an import attribute | |
8852 | referring to the module and owned entries corresponding to those | |
8853 | entities that are renamed as part of being imported. */ | |
8854 | ||
8855 | if (child_die->tag != DW_TAG_imported_declaration) | |
8856 | { | |
8857 | complaint (&symfile_complaints, | |
8858 | _("child DW_TAG_imported_declaration expected " | |
8859 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 8860 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8861 | continue; |
8862 | } | |
8863 | ||
8864 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
8865 | if (import_attr == NULL) | |
8866 | { | |
8867 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8868 | dwarf_tag_name (child_die->tag)); | |
8869 | continue; | |
8870 | } | |
8871 | ||
8872 | imported_cu = cu; | |
8873 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
8874 | &imported_cu); | |
8875 | imported_name = dwarf2_name (imported_die, imported_cu); | |
8876 | if (imported_name == NULL) | |
8877 | { | |
8878 | complaint (&symfile_complaints, | |
8879 | _("child DW_TAG_imported_declaration has unknown " | |
8880 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 8881 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8882 | continue; |
8883 | } | |
8884 | ||
8885 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
8886 | ||
8887 | process_die (child_die, cu); | |
8888 | } | |
8889 | ||
c0cc3a76 SW |
8890 | cp_add_using_directive (import_prefix, |
8891 | canonical_name, | |
8892 | import_alias, | |
13387711 | 8893 | imported_declaration, |
32019081 | 8894 | excludes, |
12aaed36 | 8895 | 0, |
bb5ed363 | 8896 | &objfile->objfile_obstack); |
32019081 JK |
8897 | |
8898 | do_cleanups (cleanups); | |
27aa8d6a SW |
8899 | } |
8900 | ||
f4dc4d17 | 8901 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 8902 | |
cb1df416 DJ |
8903 | static void |
8904 | free_cu_line_header (void *arg) | |
8905 | { | |
8906 | struct dwarf2_cu *cu = arg; | |
8907 | ||
8908 | free_line_header (cu->line_header); | |
8909 | cu->line_header = NULL; | |
8910 | } | |
8911 | ||
1b80a9fa JK |
8912 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
8913 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
8914 | this, it was first present in GCC release 4.3.0. */ | |
8915 | ||
8916 | static int | |
8917 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
8918 | { | |
8919 | if (!cu->checked_producer) | |
8920 | check_producer (cu); | |
8921 | ||
8922 | return cu->producer_is_gcc_lt_4_3; | |
8923 | } | |
8924 | ||
9291a0cd TT |
8925 | static void |
8926 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 8927 | const char **name, const char **comp_dir) |
9291a0cd TT |
8928 | { |
8929 | struct attribute *attr; | |
8930 | ||
8931 | *name = NULL; | |
8932 | *comp_dir = NULL; | |
8933 | ||
8934 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
8935 | is not a source language identifier. */ | |
8936 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8937 | if (attr) | |
8938 | { | |
8939 | *name = DW_STRING (attr); | |
8940 | } | |
8941 | ||
8942 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
8943 | if (attr) | |
8944 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
8945 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
8946 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 8947 | { |
15d034d0 TT |
8948 | char *d = ldirname (*name); |
8949 | ||
8950 | *comp_dir = d; | |
8951 | if (d != NULL) | |
8952 | make_cleanup (xfree, d); | |
9291a0cd TT |
8953 | } |
8954 | if (*comp_dir != NULL) | |
8955 | { | |
8956 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
8957 | directory, get rid of it. */ | |
8958 | char *cp = strchr (*comp_dir, ':'); | |
8959 | ||
8960 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
8961 | *comp_dir = cp + 1; | |
8962 | } | |
8963 | ||
8964 | if (*name == NULL) | |
8965 | *name = "<unknown>"; | |
8966 | } | |
8967 | ||
f4dc4d17 DE |
8968 | /* Handle DW_AT_stmt_list for a compilation unit. |
8969 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
8970 | COMP_DIR is the compilation directory. LOWPC is passed to |
8971 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
8972 | |
8973 | static void | |
8974 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 8975 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 TT |
8976 | { |
8977 | struct attribute *attr; | |
2ab95328 | 8978 | |
f4dc4d17 DE |
8979 | gdb_assert (! cu->per_cu->is_debug_types); |
8980 | ||
2ab95328 TT |
8981 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
8982 | if (attr) | |
8983 | { | |
8984 | unsigned int line_offset = DW_UNSND (attr); | |
8985 | struct line_header *line_header | |
3019eac3 | 8986 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
8987 | |
8988 | if (line_header) | |
dee91e82 DE |
8989 | { |
8990 | cu->line_header = line_header; | |
8991 | make_cleanup (free_cu_line_header, cu); | |
c3b7b696 | 8992 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, lowpc); |
dee91e82 | 8993 | } |
2ab95328 TT |
8994 | } |
8995 | } | |
8996 | ||
95554aad | 8997 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 8998 | |
c906108c | 8999 | static void |
e7c27a73 | 9000 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9001 | { |
dee91e82 | 9002 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 9003 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 9004 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9005 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9006 | struct attribute *attr; | |
15d034d0 TT |
9007 | const char *name = NULL; |
9008 | const char *comp_dir = NULL; | |
c906108c SS |
9009 | struct die_info *child_die; |
9010 | bfd *abfd = objfile->obfd; | |
e142c38c | 9011 | CORE_ADDR baseaddr; |
6e70227d | 9012 | |
e142c38c | 9013 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9014 | |
fae299cd | 9015 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9016 | |
9017 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9018 | from finish_block. */ | |
2acceee2 | 9019 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
9020 | lowpc = highpc; |
9021 | lowpc += baseaddr; | |
9022 | highpc += baseaddr; | |
9023 | ||
9291a0cd | 9024 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 9025 | |
95554aad | 9026 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9027 | |
f4b8a18d KW |
9028 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9029 | standardised yet. As a workaround for the language detection we fall | |
9030 | back to the DW_AT_producer string. */ | |
9031 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9032 | cu->language = language_opencl; | |
9033 | ||
3019eac3 DE |
9034 | /* Similar hack for Go. */ |
9035 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9036 | set_cu_language (DW_LANG_Go, cu); | |
9037 | ||
f4dc4d17 | 9038 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
9039 | |
9040 | /* Decode line number information if present. We do this before | |
9041 | processing child DIEs, so that the line header table is available | |
9042 | for DW_AT_decl_file. */ | |
c3b7b696 | 9043 | handle_DW_AT_stmt_list (die, cu, comp_dir, lowpc); |
3019eac3 DE |
9044 | |
9045 | /* Process all dies in compilation unit. */ | |
9046 | if (die->child != NULL) | |
9047 | { | |
9048 | child_die = die->child; | |
9049 | while (child_die && child_die->tag) | |
9050 | { | |
9051 | process_die (child_die, cu); | |
9052 | child_die = sibling_die (child_die); | |
9053 | } | |
9054 | } | |
9055 | ||
9056 | /* Decode macro information, if present. Dwarf 2 macro information | |
9057 | refers to information in the line number info statement program | |
9058 | header, so we can only read it if we've read the header | |
9059 | successfully. */ | |
9060 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
9061 | if (attr && cu->line_header) | |
9062 | { | |
9063 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9064 | complaint (&symfile_complaints, | |
9065 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
9066 | ||
09262596 | 9067 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
9068 | } |
9069 | else | |
9070 | { | |
9071 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9072 | if (attr && cu->line_header) | |
9073 | { | |
9074 | unsigned int macro_offset = DW_UNSND (attr); | |
9075 | ||
09262596 | 9076 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
9077 | } |
9078 | } | |
9079 | ||
9080 | do_cleanups (back_to); | |
9081 | } | |
9082 | ||
f4dc4d17 DE |
9083 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9084 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9085 | symtabs with another TU and the symtabs have already been created | |
9086 | then restore those symtabs in the line header. | |
9087 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9088 | |
9089 | static void | |
f4dc4d17 | 9090 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9091 | { |
f4dc4d17 DE |
9092 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9093 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
9094 | struct type_unit_group *tu_group; | |
9095 | int first_time; | |
9096 | struct line_header *lh; | |
3019eac3 | 9097 | struct attribute *attr; |
f4dc4d17 | 9098 | unsigned int i, line_offset; |
0186c6a7 | 9099 | struct signatured_type *sig_type; |
3019eac3 | 9100 | |
f4dc4d17 | 9101 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9102 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9103 | |
f4dc4d17 | 9104 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9105 | |
f4dc4d17 | 9106 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9107 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9108 | if (sig_type->type_unit_group == NULL) |
9109 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9110 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9111 | |
9112 | /* If we've already processed this stmt_list there's no real need to | |
9113 | do it again, we could fake it and just recreate the part we need | |
9114 | (file name,index -> symtab mapping). If data shows this optimization | |
9115 | is useful we can do it then. */ | |
9116 | first_time = tu_group->primary_symtab == NULL; | |
9117 | ||
9118 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9119 | debug info. */ | |
9120 | lh = NULL; | |
9121 | if (attr != NULL) | |
3019eac3 | 9122 | { |
f4dc4d17 DE |
9123 | line_offset = DW_UNSND (attr); |
9124 | lh = dwarf_decode_line_header (line_offset, cu); | |
9125 | } | |
9126 | if (lh == NULL) | |
9127 | { | |
9128 | if (first_time) | |
9129 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9130 | else | |
9131 | { | |
9132 | gdb_assert (tu_group->symtabs == NULL); | |
9133 | restart_symtab (0); | |
9134 | } | |
9135 | /* Note: The primary symtab will get allocated at the end. */ | |
9136 | return; | |
3019eac3 DE |
9137 | } |
9138 | ||
f4dc4d17 DE |
9139 | cu->line_header = lh; |
9140 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 9141 | |
f4dc4d17 DE |
9142 | if (first_time) |
9143 | { | |
9144 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 9145 | |
f4dc4d17 DE |
9146 | tu_group->num_symtabs = lh->num_file_names; |
9147 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 9148 | |
f4dc4d17 DE |
9149 | for (i = 0; i < lh->num_file_names; ++i) |
9150 | { | |
d521ce57 | 9151 | const char *dir = NULL; |
f4dc4d17 | 9152 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 9153 | |
f4dc4d17 DE |
9154 | if (fe->dir_index) |
9155 | dir = lh->include_dirs[fe->dir_index - 1]; | |
9156 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 9157 | |
f4dc4d17 DE |
9158 | /* Note: We don't have to watch for the main subfile here, type units |
9159 | don't have DW_AT_name. */ | |
3019eac3 | 9160 | |
f4dc4d17 DE |
9161 | if (current_subfile->symtab == NULL) |
9162 | { | |
9163 | /* NOTE: start_subfile will recognize when it's been passed | |
9164 | a file it has already seen. So we can't assume there's a | |
9165 | simple mapping from lh->file_names to subfiles, | |
9166 | lh->file_names may contain dups. */ | |
9167 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
9168 | objfile); | |
9169 | } | |
9170 | ||
9171 | fe->symtab = current_subfile->symtab; | |
9172 | tu_group->symtabs[i] = fe->symtab; | |
9173 | } | |
9174 | } | |
9175 | else | |
3019eac3 | 9176 | { |
f4dc4d17 DE |
9177 | restart_symtab (0); |
9178 | ||
9179 | for (i = 0; i < lh->num_file_names; ++i) | |
9180 | { | |
9181 | struct file_entry *fe = &lh->file_names[i]; | |
9182 | ||
9183 | fe->symtab = tu_group->symtabs[i]; | |
9184 | } | |
3019eac3 DE |
9185 | } |
9186 | ||
f4dc4d17 DE |
9187 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9188 | so they don't have a "real" (so to speak) symtab anyway. | |
9189 | There is later code that will assign the main symtab to all symbols | |
9190 | that don't have one. We need to handle the case of a symbol with a | |
9191 | missing symtab (DW_AT_decl_file) anyway. */ | |
9192 | } | |
3019eac3 | 9193 | |
f4dc4d17 DE |
9194 | /* Process DW_TAG_type_unit. |
9195 | For TUs we want to skip the first top level sibling if it's not the | |
9196 | actual type being defined by this TU. In this case the first top | |
9197 | level sibling is there to provide context only. */ | |
3019eac3 | 9198 | |
f4dc4d17 DE |
9199 | static void |
9200 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9201 | { | |
9202 | struct die_info *child_die; | |
3019eac3 | 9203 | |
f4dc4d17 DE |
9204 | prepare_one_comp_unit (cu, die, language_minimal); |
9205 | ||
9206 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9207 | We do this before processing child DIEs, so that the line header table | |
9208 | is available for DW_AT_decl_file. */ | |
9209 | setup_type_unit_groups (die, cu); | |
9210 | ||
9211 | if (die->child != NULL) | |
9212 | { | |
9213 | child_die = die->child; | |
9214 | while (child_die && child_die->tag) | |
9215 | { | |
9216 | process_die (child_die, cu); | |
9217 | child_die = sibling_die (child_die); | |
9218 | } | |
9219 | } | |
3019eac3 DE |
9220 | } |
9221 | \f | |
80626a55 DE |
9222 | /* DWO/DWP files. |
9223 | ||
9224 | http://gcc.gnu.org/wiki/DebugFission | |
9225 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9226 | ||
9227 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9228 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9229 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9230 | |
9231 | static hashval_t | |
9232 | hash_dwo_file (const void *item) | |
9233 | { | |
9234 | const struct dwo_file *dwo_file = item; | |
a2ce51a0 | 9235 | hashval_t hash; |
3019eac3 | 9236 | |
a2ce51a0 DE |
9237 | hash = htab_hash_string (dwo_file->dwo_name); |
9238 | if (dwo_file->comp_dir != NULL) | |
9239 | hash += htab_hash_string (dwo_file->comp_dir); | |
9240 | return hash; | |
3019eac3 DE |
9241 | } |
9242 | ||
9243 | static int | |
9244 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9245 | { | |
9246 | const struct dwo_file *lhs = item_lhs; | |
9247 | const struct dwo_file *rhs = item_rhs; | |
9248 | ||
a2ce51a0 DE |
9249 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9250 | return 0; | |
9251 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9252 | return lhs->comp_dir == rhs->comp_dir; | |
9253 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9254 | } |
9255 | ||
9256 | /* Allocate a hash table for DWO files. */ | |
9257 | ||
9258 | static htab_t | |
9259 | allocate_dwo_file_hash_table (void) | |
9260 | { | |
9261 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9262 | ||
9263 | return htab_create_alloc_ex (41, | |
9264 | hash_dwo_file, | |
9265 | eq_dwo_file, | |
9266 | NULL, | |
9267 | &objfile->objfile_obstack, | |
9268 | hashtab_obstack_allocate, | |
9269 | dummy_obstack_deallocate); | |
9270 | } | |
9271 | ||
80626a55 DE |
9272 | /* Lookup DWO file DWO_NAME. */ |
9273 | ||
9274 | static void ** | |
0ac5b59e | 9275 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9276 | { |
9277 | struct dwo_file find_entry; | |
9278 | void **slot; | |
9279 | ||
9280 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9281 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9282 | ||
9283 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9284 | find_entry.dwo_name = dwo_name; |
9285 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9286 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9287 | ||
9288 | return slot; | |
9289 | } | |
9290 | ||
3019eac3 DE |
9291 | static hashval_t |
9292 | hash_dwo_unit (const void *item) | |
9293 | { | |
9294 | const struct dwo_unit *dwo_unit = item; | |
9295 | ||
9296 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9297 | return dwo_unit->signature; | |
9298 | } | |
9299 | ||
9300 | static int | |
9301 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9302 | { | |
9303 | const struct dwo_unit *lhs = item_lhs; | |
9304 | const struct dwo_unit *rhs = item_rhs; | |
9305 | ||
9306 | /* The signature is assumed to be unique within the DWO file. | |
9307 | So while object file CU dwo_id's always have the value zero, | |
9308 | that's OK, assuming each object file DWO file has only one CU, | |
9309 | and that's the rule for now. */ | |
9310 | return lhs->signature == rhs->signature; | |
9311 | } | |
9312 | ||
9313 | /* Allocate a hash table for DWO CUs,TUs. | |
9314 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9315 | ||
9316 | static htab_t | |
9317 | allocate_dwo_unit_table (struct objfile *objfile) | |
9318 | { | |
9319 | /* Start out with a pretty small number. | |
9320 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9321 | return htab_create_alloc_ex (3, | |
9322 | hash_dwo_unit, | |
9323 | eq_dwo_unit, | |
9324 | NULL, | |
9325 | &objfile->objfile_obstack, | |
9326 | hashtab_obstack_allocate, | |
9327 | dummy_obstack_deallocate); | |
9328 | } | |
9329 | ||
80626a55 | 9330 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9331 | |
19c3d4c9 | 9332 | struct create_dwo_cu_data |
3019eac3 DE |
9333 | { |
9334 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9335 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9336 | }; |
9337 | ||
19c3d4c9 | 9338 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9339 | |
9340 | static void | |
19c3d4c9 DE |
9341 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9342 | const gdb_byte *info_ptr, | |
9343 | struct die_info *comp_unit_die, | |
9344 | int has_children, | |
9345 | void *datap) | |
3019eac3 DE |
9346 | { |
9347 | struct dwarf2_cu *cu = reader->cu; | |
9348 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9349 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 9350 | struct dwarf2_section_info *section = cu->per_cu->section; |
19c3d4c9 | 9351 | struct create_dwo_cu_data *data = datap; |
3019eac3 | 9352 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9353 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9354 | struct attribute *attr; |
3019eac3 DE |
9355 | |
9356 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9357 | if (attr == NULL) | |
9358 | { | |
19c3d4c9 DE |
9359 | complaint (&symfile_complaints, |
9360 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9361 | " its dwo_id [in module %s]"), | |
9362 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
9363 | return; |
9364 | } | |
9365 | ||
3019eac3 DE |
9366 | dwo_unit->dwo_file = dwo_file; |
9367 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9368 | dwo_unit->section = section; |
3019eac3 DE |
9369 | dwo_unit->offset = offset; |
9370 | dwo_unit->length = cu->per_cu->length; | |
9371 | ||
09406207 | 9372 | if (dwarf2_read_debug) |
4031ecc5 DE |
9373 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9374 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9375 | } |
9376 | ||
19c3d4c9 DE |
9377 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
9378 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 9379 | |
19c3d4c9 DE |
9380 | static struct dwo_unit * |
9381 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
9382 | { |
9383 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9384 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
9385 | bfd *abfd; | |
9386 | htab_t cu_htab; | |
d521ce57 | 9387 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
9388 | struct create_dwo_cu_data create_dwo_cu_data; |
9389 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
9390 | |
9391 | dwarf2_read_section (objfile, section); | |
9392 | info_ptr = section->buffer; | |
9393 | ||
9394 | if (info_ptr == NULL) | |
9395 | return NULL; | |
9396 | ||
9397 | /* We can't set abfd until now because the section may be empty or | |
9398 | not present, in which case section->asection will be NULL. */ | |
a32a8923 | 9399 | abfd = get_section_bfd_owner (section); |
3019eac3 | 9400 | |
09406207 | 9401 | if (dwarf2_read_debug) |
19c3d4c9 DE |
9402 | { |
9403 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
a32a8923 DE |
9404 | get_section_name (section), |
9405 | get_section_file_name (section)); | |
19c3d4c9 | 9406 | } |
3019eac3 | 9407 | |
19c3d4c9 DE |
9408 | create_dwo_cu_data.dwo_file = dwo_file; |
9409 | dwo_unit = NULL; | |
3019eac3 DE |
9410 | |
9411 | end_ptr = info_ptr + section->size; | |
9412 | while (info_ptr < end_ptr) | |
9413 | { | |
9414 | struct dwarf2_per_cu_data per_cu; | |
9415 | ||
19c3d4c9 DE |
9416 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9417 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9418 | memset (&per_cu, 0, sizeof (per_cu)); |
9419 | per_cu.objfile = objfile; | |
9420 | per_cu.is_debug_types = 0; | |
9421 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 9422 | per_cu.section = section; |
3019eac3 | 9423 | |
33e80786 | 9424 | init_cutu_and_read_dies_no_follow (&per_cu, dwo_file, |
19c3d4c9 DE |
9425 | create_dwo_cu_reader, |
9426 | &create_dwo_cu_data); | |
9427 | ||
9428 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
9429 | { | |
9430 | /* If we've already found one, complain. We only support one | |
9431 | because having more than one requires hacking the dwo_name of | |
9432 | each to match, which is highly unlikely to happen. */ | |
9433 | if (dwo_unit != NULL) | |
9434 | { | |
9435 | complaint (&symfile_complaints, | |
9436 | _("Multiple CUs in DWO file %s [in module %s]"), | |
4262abfb | 9437 | dwo_file->dwo_name, objfile_name (objfile)); |
19c3d4c9 DE |
9438 | break; |
9439 | } | |
9440 | ||
9441 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9442 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9443 | } | |
3019eac3 DE |
9444 | |
9445 | info_ptr += per_cu.length; | |
9446 | } | |
9447 | ||
19c3d4c9 | 9448 | return dwo_unit; |
3019eac3 DE |
9449 | } |
9450 | ||
80626a55 DE |
9451 | /* DWP file .debug_{cu,tu}_index section format: |
9452 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9453 | ||
d2415c6c DE |
9454 | DWP Version 1: |
9455 | ||
80626a55 DE |
9456 | Both index sections have the same format, and serve to map a 64-bit |
9457 | signature to a set of section numbers. Each section begins with a header, | |
9458 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9459 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9460 | aligned at 8-byte boundaries in the file. | |
9461 | ||
d2415c6c DE |
9462 | The index section header consists of: |
9463 | ||
9464 | V, 32 bit version number | |
9465 | -, 32 bits unused | |
9466 | N, 32 bit number of compilation units or type units in the index | |
9467 | M, 32 bit number of slots in the hash table | |
80626a55 | 9468 | |
d2415c6c | 9469 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9470 | |
d2415c6c DE |
9471 | The hash table begins at offset 16 in the section, and consists of an array |
9472 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9473 | order of the application binary). Unused slots in the hash table are 0. | |
9474 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9475 | |
d2415c6c DE |
9476 | The parallel table begins immediately after the hash table |
9477 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9478 | array of 32-bit indexes (using the byte order of the application binary), | |
9479 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9480 | table contains a 32-bit index into the pool of section numbers. For unused | |
9481 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9482 | |
73869dc2 DE |
9483 | The pool of section numbers begins immediately following the hash table |
9484 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9485 | section numbers consists of an array of 32-bit words (using the byte order | |
9486 | of the application binary). Each item in the array is indexed starting | |
9487 | from 0. The hash table entry provides the index of the first section | |
9488 | number in the set. Additional section numbers in the set follow, and the | |
9489 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9490 | ||
9491 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9492 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9493 | be the second entry. Other members of the set may follow in any order. | |
9494 | ||
9495 | --- | |
9496 | ||
9497 | DWP Version 2: | |
9498 | ||
9499 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9500 | and the entries in the index tables are now offsets into these sections. | |
9501 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9502 | section. | |
9503 | ||
9504 | Index Section Contents: | |
9505 | Header | |
9506 | Hash Table of Signatures dwp_hash_table.hash_table | |
9507 | Parallel Table of Indices dwp_hash_table.unit_table | |
9508 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
9509 | Table of Section Sizes dwp_hash_table.v2.sizes | |
9510 | ||
9511 | The index section header consists of: | |
9512 | ||
9513 | V, 32 bit version number | |
9514 | L, 32 bit number of columns in the table of section offsets | |
9515 | N, 32 bit number of compilation units or type units in the index | |
9516 | M, 32 bit number of slots in the hash table | |
9517 | ||
9518 | Numbers are recorded using the byte order of the application binary. | |
9519 | ||
9520 | The hash table has the same format as version 1. | |
9521 | The parallel table of indices has the same format as version 1, | |
9522 | except that the entries are origin-1 indices into the table of sections | |
9523 | offsets and the table of section sizes. | |
9524 | ||
9525 | The table of offsets begins immediately following the parallel table | |
9526 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
9527 | a two-dimensional array of 32-bit words (using the byte order of the | |
9528 | application binary), with L columns and N+1 rows, in row-major order. | |
9529 | Each row in the array is indexed starting from 0. The first row provides | |
9530 | a key to the remaining rows: each column in this row provides an identifier | |
9531 | for a debug section, and the offsets in the same column of subsequent rows | |
9532 | refer to that section. The section identifiers are: | |
9533 | ||
9534 | DW_SECT_INFO 1 .debug_info.dwo | |
9535 | DW_SECT_TYPES 2 .debug_types.dwo | |
9536 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
9537 | DW_SECT_LINE 4 .debug_line.dwo | |
9538 | DW_SECT_LOC 5 .debug_loc.dwo | |
9539 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
9540 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
9541 | DW_SECT_MACRO 8 .debug_macro.dwo | |
9542 | ||
9543 | The offsets provided by the CU and TU index sections are the base offsets | |
9544 | for the contributions made by each CU or TU to the corresponding section | |
9545 | in the package file. Each CU and TU header contains an abbrev_offset | |
9546 | field, used to find the abbreviations table for that CU or TU within the | |
9547 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
9548 | be interpreted as relative to the base offset given in the index section. | |
9549 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
9550 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
9551 | and offsets into other debug sections obtained from DWARF attributes should | |
9552 | also be interpreted as relative to the corresponding base offset. | |
9553 | ||
9554 | The table of sizes begins immediately following the table of offsets. | |
9555 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
9556 | with L columns and N rows, in row-major order. Each row in the array is | |
9557 | indexed starting from 1 (row 0 is shared by the two tables). | |
9558 | ||
9559 | --- | |
9560 | ||
9561 | Hash table lookup is handled the same in version 1 and 2: | |
9562 | ||
9563 | We assume that N and M will not exceed 2^32 - 1. | |
9564 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
9565 | ||
d2415c6c DE |
9566 | Given a 64-bit compilation unit signature or a type signature S, an entry |
9567 | in the hash table is located as follows: | |
80626a55 | 9568 | |
d2415c6c DE |
9569 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
9570 | the low-order k bits all set to 1. | |
80626a55 | 9571 | |
d2415c6c | 9572 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 9573 | |
d2415c6c DE |
9574 | 3) If the hash table entry at index H matches the signature, use that |
9575 | entry. If the hash table entry at index H is unused (all zeroes), | |
9576 | terminate the search: the signature is not present in the table. | |
80626a55 | 9577 | |
d2415c6c | 9578 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 9579 | |
d2415c6c | 9580 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 9581 | to stop at an unused slot or find the match. */ |
80626a55 DE |
9582 | |
9583 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
9584 | .debug_{info,types}.dwo in DWP_FILE. | |
9585 | Returns NULL if there isn't one. | |
9586 | Note: This function processes DWP files only, not DWO files. */ | |
9587 | ||
9588 | static struct dwp_hash_table * | |
9589 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
9590 | { | |
9591 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9592 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 9593 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 9594 | struct dwarf2_section_info *index; |
73869dc2 | 9595 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
9596 | struct dwp_hash_table *htab; |
9597 | ||
9598 | if (is_debug_types) | |
9599 | index = &dwp_file->sections.tu_index; | |
9600 | else | |
9601 | index = &dwp_file->sections.cu_index; | |
9602 | ||
9603 | if (dwarf2_section_empty_p (index)) | |
9604 | return NULL; | |
9605 | dwarf2_read_section (objfile, index); | |
9606 | ||
9607 | index_ptr = index->buffer; | |
9608 | index_end = index_ptr + index->size; | |
9609 | ||
9610 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
9611 | index_ptr += 4; |
9612 | if (version == 2) | |
9613 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
9614 | else | |
9615 | nr_columns = 0; | |
9616 | index_ptr += 4; | |
80626a55 DE |
9617 | nr_units = read_4_bytes (dbfd, index_ptr); |
9618 | index_ptr += 4; | |
9619 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
9620 | index_ptr += 4; | |
9621 | ||
73869dc2 | 9622 | if (version != 1 && version != 2) |
80626a55 | 9623 | { |
21aa081e | 9624 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 9625 | " [in module %s]"), |
21aa081e | 9626 | pulongest (version), dwp_file->name); |
80626a55 DE |
9627 | } |
9628 | if (nr_slots != (nr_slots & -nr_slots)) | |
9629 | { | |
21aa081e | 9630 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 9631 | " is not power of 2 [in module %s]"), |
21aa081e | 9632 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
9633 | } |
9634 | ||
9635 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
9636 | htab->version = version; |
9637 | htab->nr_columns = nr_columns; | |
80626a55 DE |
9638 | htab->nr_units = nr_units; |
9639 | htab->nr_slots = nr_slots; | |
9640 | htab->hash_table = index_ptr; | |
9641 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
9642 | |
9643 | /* Exit early if the table is empty. */ | |
9644 | if (nr_slots == 0 || nr_units == 0 | |
9645 | || (version == 2 && nr_columns == 0)) | |
9646 | { | |
9647 | /* All must be zero. */ | |
9648 | if (nr_slots != 0 || nr_units != 0 | |
9649 | || (version == 2 && nr_columns != 0)) | |
9650 | { | |
9651 | complaint (&symfile_complaints, | |
9652 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
9653 | " all zero [in modules %s]"), | |
9654 | dwp_file->name); | |
9655 | } | |
9656 | return htab; | |
9657 | } | |
9658 | ||
9659 | if (version == 1) | |
9660 | { | |
9661 | htab->section_pool.v1.indices = | |
9662 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9663 | /* It's harder to decide whether the section is too small in v1. | |
9664 | V1 is deprecated anyway so we punt. */ | |
9665 | } | |
9666 | else | |
9667 | { | |
9668 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9669 | int *ids = htab->section_pool.v2.section_ids; | |
9670 | /* Reverse map for error checking. */ | |
9671 | int ids_seen[DW_SECT_MAX + 1]; | |
9672 | int i; | |
9673 | ||
9674 | if (nr_columns < 2) | |
9675 | { | |
9676 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
9677 | " in section table [in module %s]"), | |
9678 | dwp_file->name); | |
9679 | } | |
9680 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
9681 | { | |
9682 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
9683 | " in section table [in module %s]"), | |
9684 | dwp_file->name); | |
9685 | } | |
9686 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9687 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9688 | for (i = 0; i < nr_columns; ++i) | |
9689 | { | |
9690 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
9691 | ||
9692 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
9693 | { | |
9694 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
9695 | " in section table [in module %s]"), | |
9696 | id, dwp_file->name); | |
9697 | } | |
9698 | if (ids_seen[id] != -1) | |
9699 | { | |
9700 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
9701 | " id %d in section table [in module %s]"), | |
9702 | id, dwp_file->name); | |
9703 | } | |
9704 | ids_seen[id] = i; | |
9705 | ids[i] = id; | |
9706 | } | |
9707 | /* Must have exactly one info or types section. */ | |
9708 | if (((ids_seen[DW_SECT_INFO] != -1) | |
9709 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
9710 | != 1) | |
9711 | { | |
9712 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
9713 | " DWO info/types section [in module %s]"), | |
9714 | dwp_file->name); | |
9715 | } | |
9716 | /* Must have an abbrev section. */ | |
9717 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
9718 | { | |
9719 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
9720 | " section [in module %s]"), | |
9721 | dwp_file->name); | |
9722 | } | |
9723 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
9724 | htab->section_pool.v2.sizes = | |
9725 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
9726 | * nr_units * nr_columns); | |
9727 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
9728 | * nr_units * nr_columns)) | |
9729 | > index_end) | |
9730 | { | |
9731 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
9732 | " [in module %s]"), | |
9733 | dwp_file->name); | |
9734 | } | |
9735 | } | |
80626a55 DE |
9736 | |
9737 | return htab; | |
9738 | } | |
9739 | ||
9740 | /* Update SECTIONS with the data from SECTP. | |
9741 | ||
9742 | This function is like the other "locate" section routines that are | |
9743 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 9744 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
9745 | |
9746 | The result is non-zero for success, or zero if an error was found. */ | |
9747 | ||
9748 | static int | |
73869dc2 DE |
9749 | locate_v1_virtual_dwo_sections (asection *sectp, |
9750 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
9751 | { |
9752 | const struct dwop_section_names *names = &dwop_section_names; | |
9753 | ||
9754 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9755 | { | |
9756 | /* There can be only one. */ | |
73869dc2 | 9757 | if (sections->abbrev.s.asection != NULL) |
80626a55 | 9758 | return 0; |
73869dc2 | 9759 | sections->abbrev.s.asection = sectp; |
80626a55 DE |
9760 | sections->abbrev.size = bfd_get_section_size (sectp); |
9761 | } | |
9762 | else if (section_is_p (sectp->name, &names->info_dwo) | |
9763 | || section_is_p (sectp->name, &names->types_dwo)) | |
9764 | { | |
9765 | /* There can be only one. */ | |
73869dc2 | 9766 | if (sections->info_or_types.s.asection != NULL) |
80626a55 | 9767 | return 0; |
73869dc2 | 9768 | sections->info_or_types.s.asection = sectp; |
80626a55 DE |
9769 | sections->info_or_types.size = bfd_get_section_size (sectp); |
9770 | } | |
9771 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9772 | { | |
9773 | /* There can be only one. */ | |
73869dc2 | 9774 | if (sections->line.s.asection != NULL) |
80626a55 | 9775 | return 0; |
73869dc2 | 9776 | sections->line.s.asection = sectp; |
80626a55 DE |
9777 | sections->line.size = bfd_get_section_size (sectp); |
9778 | } | |
9779 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9780 | { | |
9781 | /* There can be only one. */ | |
73869dc2 | 9782 | if (sections->loc.s.asection != NULL) |
80626a55 | 9783 | return 0; |
73869dc2 | 9784 | sections->loc.s.asection = sectp; |
80626a55 DE |
9785 | sections->loc.size = bfd_get_section_size (sectp); |
9786 | } | |
9787 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9788 | { | |
9789 | /* There can be only one. */ | |
73869dc2 | 9790 | if (sections->macinfo.s.asection != NULL) |
80626a55 | 9791 | return 0; |
73869dc2 | 9792 | sections->macinfo.s.asection = sectp; |
80626a55 DE |
9793 | sections->macinfo.size = bfd_get_section_size (sectp); |
9794 | } | |
9795 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9796 | { | |
9797 | /* There can be only one. */ | |
73869dc2 | 9798 | if (sections->macro.s.asection != NULL) |
80626a55 | 9799 | return 0; |
73869dc2 | 9800 | sections->macro.s.asection = sectp; |
80626a55 DE |
9801 | sections->macro.size = bfd_get_section_size (sectp); |
9802 | } | |
9803 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9804 | { | |
9805 | /* There can be only one. */ | |
73869dc2 | 9806 | if (sections->str_offsets.s.asection != NULL) |
80626a55 | 9807 | return 0; |
73869dc2 | 9808 | sections->str_offsets.s.asection = sectp; |
80626a55 DE |
9809 | sections->str_offsets.size = bfd_get_section_size (sectp); |
9810 | } | |
9811 | else | |
9812 | { | |
9813 | /* No other kind of section is valid. */ | |
9814 | return 0; | |
9815 | } | |
9816 | ||
9817 | return 1; | |
9818 | } | |
9819 | ||
73869dc2 DE |
9820 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
9821 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
9822 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
9823 | This is for DWP version 1 files. */ | |
80626a55 DE |
9824 | |
9825 | static struct dwo_unit * | |
73869dc2 DE |
9826 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
9827 | uint32_t unit_index, | |
9828 | const char *comp_dir, | |
9829 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
9830 | { |
9831 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
9832 | const struct dwp_hash_table *dwp_htab = |
9833 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
9834 | bfd *dbfd = dwp_file->dbfd; |
9835 | const char *kind = is_debug_types ? "TU" : "CU"; | |
9836 | struct dwo_file *dwo_file; | |
9837 | struct dwo_unit *dwo_unit; | |
73869dc2 | 9838 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
9839 | void **dwo_file_slot; |
9840 | char *virtual_dwo_name; | |
9841 | struct dwarf2_section_info *cutu; | |
9842 | struct cleanup *cleanups; | |
9843 | int i; | |
9844 | ||
73869dc2 DE |
9845 | gdb_assert (dwp_file->version == 1); |
9846 | ||
80626a55 DE |
9847 | if (dwarf2_read_debug) |
9848 | { | |
73869dc2 | 9849 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 9850 | kind, |
73869dc2 | 9851 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
9852 | dwp_file->name); |
9853 | } | |
9854 | ||
19ac8c2e | 9855 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
9856 | Put a limit on the number of sections we look for so that bad data |
9857 | doesn't cause us to loop forever. */ | |
9858 | ||
73869dc2 | 9859 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
9860 | (1 /* .debug_info or .debug_types */ \ |
9861 | + 1 /* .debug_abbrev */ \ | |
9862 | + 1 /* .debug_line */ \ | |
9863 | + 1 /* .debug_loc */ \ | |
9864 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 9865 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
9866 | + 1 /* trailing zero */) |
9867 | ||
9868 | memset (§ions, 0, sizeof (sections)); | |
9869 | cleanups = make_cleanup (null_cleanup, 0); | |
9870 | ||
73869dc2 | 9871 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
9872 | { |
9873 | asection *sectp; | |
9874 | uint32_t section_nr = | |
9875 | read_4_bytes (dbfd, | |
73869dc2 DE |
9876 | dwp_htab->section_pool.v1.indices |
9877 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
9878 | |
9879 | if (section_nr == 0) | |
9880 | break; | |
9881 | if (section_nr >= dwp_file->num_sections) | |
9882 | { | |
9883 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
9884 | " [in module %s]"), | |
9885 | dwp_file->name); | |
9886 | } | |
9887 | ||
9888 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 9889 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
9890 | { |
9891 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
9892 | " [in module %s]"), | |
9893 | dwp_file->name); | |
9894 | } | |
9895 | } | |
9896 | ||
9897 | if (i < 2 | |
a32a8923 DE |
9898 | || dwarf2_section_empty_p (§ions.info_or_types) |
9899 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
9900 | { |
9901 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
9902 | " [in module %s]"), | |
9903 | dwp_file->name); | |
9904 | } | |
73869dc2 | 9905 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
9906 | { |
9907 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
9908 | " [in module %s]"), | |
9909 | dwp_file->name); | |
9910 | } | |
9911 | ||
9912 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
9913 | have dwo_unit "live" in that. At least for now. | |
9914 | ||
9915 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 9916 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
9917 | file, we can combine them back into a virtual DWO file to save space |
9918 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
9919 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
9920 | ||
2792b94d PM |
9921 | virtual_dwo_name = |
9922 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
9923 | get_section_id (§ions.abbrev), |
9924 | get_section_id (§ions.line), | |
9925 | get_section_id (§ions.loc), | |
9926 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
9927 | make_cleanup (xfree, virtual_dwo_name); |
9928 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 9929 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
9930 | /* Create one if necessary. */ |
9931 | if (*dwo_file_slot == NULL) | |
9932 | { | |
9933 | if (dwarf2_read_debug) | |
9934 | { | |
9935 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
9936 | virtual_dwo_name); | |
9937 | } | |
9938 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9939 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, |
9940 | virtual_dwo_name, | |
9941 | strlen (virtual_dwo_name)); | |
9942 | dwo_file->comp_dir = comp_dir; | |
80626a55 DE |
9943 | dwo_file->sections.abbrev = sections.abbrev; |
9944 | dwo_file->sections.line = sections.line; | |
9945 | dwo_file->sections.loc = sections.loc; | |
9946 | dwo_file->sections.macinfo = sections.macinfo; | |
9947 | dwo_file->sections.macro = sections.macro; | |
9948 | dwo_file->sections.str_offsets = sections.str_offsets; | |
9949 | /* The "str" section is global to the entire DWP file. */ | |
9950 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 9951 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
9952 | there's no need to record it in dwo_file. |
9953 | Also, we can't simply record type sections in dwo_file because | |
9954 | we record a pointer into the vector in dwo_unit. As we collect more | |
9955 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
9956 | for it, invalidating all copies of pointers into the previous |
9957 | contents. */ | |
80626a55 DE |
9958 | *dwo_file_slot = dwo_file; |
9959 | } | |
9960 | else | |
9961 | { | |
9962 | if (dwarf2_read_debug) | |
9963 | { | |
9964 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
9965 | virtual_dwo_name); | |
9966 | } | |
9967 | dwo_file = *dwo_file_slot; | |
9968 | } | |
9969 | do_cleanups (cleanups); | |
9970 | ||
9971 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9972 | dwo_unit->dwo_file = dwo_file; | |
9973 | dwo_unit->signature = signature; | |
8a0459fd DE |
9974 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, |
9975 | sizeof (struct dwarf2_section_info)); | |
9976 | *dwo_unit->section = sections.info_or_types; | |
57d63ce2 | 9977 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
9978 | |
9979 | return dwo_unit; | |
9980 | } | |
9981 | ||
73869dc2 DE |
9982 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
9983 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
9984 | piece within that section used by a TU/CU, return a virtual section | |
9985 | of just that piece. */ | |
9986 | ||
9987 | static struct dwarf2_section_info | |
9988 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
9989 | bfd_size_type offset, bfd_size_type size) | |
9990 | { | |
9991 | struct dwarf2_section_info result; | |
9992 | asection *sectp; | |
9993 | ||
9994 | gdb_assert (section != NULL); | |
9995 | gdb_assert (!section->is_virtual); | |
9996 | ||
9997 | memset (&result, 0, sizeof (result)); | |
9998 | result.s.containing_section = section; | |
9999 | result.is_virtual = 1; | |
10000 | ||
10001 | if (size == 0) | |
10002 | return result; | |
10003 | ||
10004 | sectp = get_section_bfd_section (section); | |
10005 | ||
10006 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10007 | bounds of the real section. This is a pretty-rare event, so just | |
10008 | flag an error (easier) instead of a warning and trying to cope. */ | |
10009 | if (sectp == NULL | |
10010 | || offset + size > bfd_get_section_size (sectp)) | |
10011 | { | |
10012 | bfd *abfd = sectp->owner; | |
10013 | ||
10014 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10015 | " in section %s [in module %s]"), | |
10016 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10017 | objfile_name (dwarf2_per_objfile->objfile)); | |
10018 | } | |
10019 | ||
10020 | result.virtual_offset = offset; | |
10021 | result.size = size; | |
10022 | return result; | |
10023 | } | |
10024 | ||
10025 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10026 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10027 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10028 | This is for DWP version 2 files. */ | |
10029 | ||
10030 | static struct dwo_unit * | |
10031 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10032 | uint32_t unit_index, | |
10033 | const char *comp_dir, | |
10034 | ULONGEST signature, int is_debug_types) | |
10035 | { | |
10036 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10037 | const struct dwp_hash_table *dwp_htab = | |
10038 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10039 | bfd *dbfd = dwp_file->dbfd; | |
10040 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10041 | struct dwo_file *dwo_file; | |
10042 | struct dwo_unit *dwo_unit; | |
10043 | struct virtual_v2_dwo_sections sections; | |
10044 | void **dwo_file_slot; | |
10045 | char *virtual_dwo_name; | |
10046 | struct dwarf2_section_info *cutu; | |
10047 | struct cleanup *cleanups; | |
10048 | int i; | |
10049 | ||
10050 | gdb_assert (dwp_file->version == 2); | |
10051 | ||
10052 | if (dwarf2_read_debug) | |
10053 | { | |
10054 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10055 | kind, | |
10056 | pulongest (unit_index), hex_string (signature), | |
10057 | dwp_file->name); | |
10058 | } | |
10059 | ||
10060 | /* Fetch the section offsets of this DWO unit. */ | |
10061 | ||
10062 | memset (§ions, 0, sizeof (sections)); | |
10063 | cleanups = make_cleanup (null_cleanup, 0); | |
10064 | ||
10065 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10066 | { | |
10067 | uint32_t offset = read_4_bytes (dbfd, | |
10068 | dwp_htab->section_pool.v2.offsets | |
10069 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10070 | + i) | |
10071 | * sizeof (uint32_t))); | |
10072 | uint32_t size = read_4_bytes (dbfd, | |
10073 | dwp_htab->section_pool.v2.sizes | |
10074 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10075 | + i) | |
10076 | * sizeof (uint32_t))); | |
10077 | ||
10078 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10079 | { | |
10080 | case DW_SECT_INFO: | |
10081 | case DW_SECT_TYPES: | |
10082 | sections.info_or_types_offset = offset; | |
10083 | sections.info_or_types_size = size; | |
10084 | break; | |
10085 | case DW_SECT_ABBREV: | |
10086 | sections.abbrev_offset = offset; | |
10087 | sections.abbrev_size = size; | |
10088 | break; | |
10089 | case DW_SECT_LINE: | |
10090 | sections.line_offset = offset; | |
10091 | sections.line_size = size; | |
10092 | break; | |
10093 | case DW_SECT_LOC: | |
10094 | sections.loc_offset = offset; | |
10095 | sections.loc_size = size; | |
10096 | break; | |
10097 | case DW_SECT_STR_OFFSETS: | |
10098 | sections.str_offsets_offset = offset; | |
10099 | sections.str_offsets_size = size; | |
10100 | break; | |
10101 | case DW_SECT_MACINFO: | |
10102 | sections.macinfo_offset = offset; | |
10103 | sections.macinfo_size = size; | |
10104 | break; | |
10105 | case DW_SECT_MACRO: | |
10106 | sections.macro_offset = offset; | |
10107 | sections.macro_size = size; | |
10108 | break; | |
10109 | } | |
10110 | } | |
10111 | ||
10112 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10113 | have dwo_unit "live" in that. At least for now. | |
10114 | ||
10115 | The DWP file can be made up of a random collection of CUs and TUs. | |
10116 | However, for each CU + set of TUs that came from the same original DWO | |
10117 | file, we can combine them back into a virtual DWO file to save space | |
10118 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10119 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10120 | ||
10121 | virtual_dwo_name = | |
10122 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10123 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10124 | (long) (sections.line_size ? sections.line_offset : 0), | |
10125 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10126 | (long) (sections.str_offsets_size | |
10127 | ? sections.str_offsets_offset : 0)); | |
10128 | make_cleanup (xfree, virtual_dwo_name); | |
10129 | /* Can we use an existing virtual DWO file? */ | |
10130 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10131 | /* Create one if necessary. */ | |
10132 | if (*dwo_file_slot == NULL) | |
10133 | { | |
10134 | if (dwarf2_read_debug) | |
10135 | { | |
10136 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10137 | virtual_dwo_name); | |
10138 | } | |
10139 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
10140 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, | |
10141 | virtual_dwo_name, | |
10142 | strlen (virtual_dwo_name)); | |
10143 | dwo_file->comp_dir = comp_dir; | |
10144 | dwo_file->sections.abbrev = | |
10145 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10146 | sections.abbrev_offset, sections.abbrev_size); | |
10147 | dwo_file->sections.line = | |
10148 | create_dwp_v2_section (&dwp_file->sections.line, | |
10149 | sections.line_offset, sections.line_size); | |
10150 | dwo_file->sections.loc = | |
10151 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10152 | sections.loc_offset, sections.loc_size); | |
10153 | dwo_file->sections.macinfo = | |
10154 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10155 | sections.macinfo_offset, sections.macinfo_size); | |
10156 | dwo_file->sections.macro = | |
10157 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10158 | sections.macro_offset, sections.macro_size); | |
10159 | dwo_file->sections.str_offsets = | |
10160 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10161 | sections.str_offsets_offset, | |
10162 | sections.str_offsets_size); | |
10163 | /* The "str" section is global to the entire DWP file. */ | |
10164 | dwo_file->sections.str = dwp_file->sections.str; | |
10165 | /* The info or types section is assigned below to dwo_unit, | |
10166 | there's no need to record it in dwo_file. | |
10167 | Also, we can't simply record type sections in dwo_file because | |
10168 | we record a pointer into the vector in dwo_unit. As we collect more | |
10169 | types we'll grow the vector and eventually have to reallocate space | |
10170 | for it, invalidating all copies of pointers into the previous | |
10171 | contents. */ | |
10172 | *dwo_file_slot = dwo_file; | |
10173 | } | |
10174 | else | |
10175 | { | |
10176 | if (dwarf2_read_debug) | |
10177 | { | |
10178 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10179 | virtual_dwo_name); | |
10180 | } | |
10181 | dwo_file = *dwo_file_slot; | |
10182 | } | |
10183 | do_cleanups (cleanups); | |
10184 | ||
10185 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10186 | dwo_unit->dwo_file = dwo_file; | |
10187 | dwo_unit->signature = signature; | |
10188 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, | |
10189 | sizeof (struct dwarf2_section_info)); | |
10190 | *dwo_unit->section = create_dwp_v2_section (is_debug_types | |
10191 | ? &dwp_file->sections.types | |
10192 | : &dwp_file->sections.info, | |
10193 | sections.info_or_types_offset, | |
10194 | sections.info_or_types_size); | |
10195 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10196 | ||
10197 | return dwo_unit; | |
10198 | } | |
10199 | ||
57d63ce2 DE |
10200 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10201 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10202 | |
10203 | static struct dwo_unit * | |
57d63ce2 DE |
10204 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10205 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10206 | { |
57d63ce2 DE |
10207 | const struct dwp_hash_table *dwp_htab = |
10208 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10209 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10210 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10211 | uint32_t hash = signature & mask; |
10212 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10213 | unsigned int i; | |
10214 | void **slot; | |
10215 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
10216 | ||
10217 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10218 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10219 | slot = htab_find_slot (is_debug_types |
10220 | ? dwp_file->loaded_tus | |
10221 | : dwp_file->loaded_cus, | |
10222 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10223 | |
10224 | if (*slot != NULL) | |
10225 | return *slot; | |
10226 | ||
10227 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10228 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10229 | { |
10230 | ULONGEST signature_in_table; | |
10231 | ||
10232 | signature_in_table = | |
57d63ce2 | 10233 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10234 | if (signature_in_table == signature) |
10235 | { | |
57d63ce2 DE |
10236 | uint32_t unit_index = |
10237 | read_4_bytes (dbfd, | |
10238 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10239 | |
73869dc2 DE |
10240 | if (dwp_file->version == 1) |
10241 | { | |
10242 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10243 | comp_dir, signature, | |
10244 | is_debug_types); | |
10245 | } | |
10246 | else | |
10247 | { | |
10248 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10249 | comp_dir, signature, | |
10250 | is_debug_types); | |
10251 | } | |
80626a55 DE |
10252 | return *slot; |
10253 | } | |
10254 | if (signature_in_table == 0) | |
10255 | return NULL; | |
10256 | hash = (hash + hash2) & mask; | |
10257 | } | |
10258 | ||
10259 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10260 | " [in module %s]"), | |
10261 | dwp_file->name); | |
10262 | } | |
10263 | ||
ab5088bf | 10264 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10265 | Open the file specified by FILE_NAME and hand it off to BFD for |
10266 | preliminary analysis. Return a newly initialized bfd *, which | |
10267 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10268 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10269 | SEARCH_CWD is true if the current directory is to be searched. |
10270 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10271 | If successful, the file is added to the bfd include table of the |
10272 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10273 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10274 | NOTE: This function is derived from symfile_bfd_open. */ |
10275 | ||
10276 | static bfd * | |
6ac97d4c | 10277 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
10278 | { |
10279 | bfd *sym_bfd; | |
80626a55 | 10280 | int desc, flags; |
3019eac3 | 10281 | char *absolute_name; |
9c02c129 DE |
10282 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10283 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10284 | to debug_file_directory. */ | |
10285 | char *search_path; | |
10286 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10287 | ||
6ac97d4c DE |
10288 | if (search_cwd) |
10289 | { | |
10290 | if (*debug_file_directory != '\0') | |
10291 | search_path = concat (".", dirname_separator_string, | |
10292 | debug_file_directory, NULL); | |
10293 | else | |
10294 | search_path = xstrdup ("."); | |
10295 | } | |
9c02c129 | 10296 | else |
6ac97d4c | 10297 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10298 | |
492c0ab7 | 10299 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10300 | if (is_dwp) |
10301 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10302 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10303 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10304 | xfree (search_path); |
3019eac3 DE |
10305 | if (desc < 0) |
10306 | return NULL; | |
10307 | ||
bb397797 | 10308 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 10309 | xfree (absolute_name); |
9c02c129 DE |
10310 | if (sym_bfd == NULL) |
10311 | return NULL; | |
3019eac3 DE |
10312 | bfd_set_cacheable (sym_bfd, 1); |
10313 | ||
10314 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
10315 | { | |
cbb099e8 | 10316 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
10317 | return NULL; |
10318 | } | |
10319 | ||
13aaf454 DE |
10320 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10321 | This is important because things like demangled_names_hash lives in the | |
10322 | objfile's per_bfd space and may have references to things like symbol | |
10323 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
10324 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd); | |
10325 | ||
3019eac3 DE |
10326 | return sym_bfd; |
10327 | } | |
10328 | ||
ab5088bf | 10329 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10330 | COMP_DIR is the DW_AT_comp_dir attribute. |
10331 | The result is the bfd handle of the file. | |
10332 | If there is a problem finding or opening the file, return NULL. | |
10333 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10334 | same as symfile_bfd_open. */ | |
10335 | ||
10336 | static bfd * | |
ab5088bf | 10337 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
10338 | { |
10339 | bfd *abfd; | |
3019eac3 | 10340 | |
80626a55 | 10341 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10342 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10343 | |
10344 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10345 | ||
10346 | if (comp_dir != NULL) | |
10347 | { | |
80626a55 | 10348 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
10349 | |
10350 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10351 | search path, which seems useful. */ | |
6ac97d4c | 10352 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10353 | xfree (path_to_try); |
10354 | if (abfd != NULL) | |
10355 | return abfd; | |
10356 | } | |
10357 | ||
10358 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10359 | is a list of paths. */ | |
10360 | ||
10361 | if (*debug_file_directory == '\0') | |
10362 | return NULL; | |
10363 | ||
6ac97d4c | 10364 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10365 | } |
10366 | ||
80626a55 DE |
10367 | /* This function is mapped across the sections and remembers the offset and |
10368 | size of each of the DWO debugging sections we are interested in. */ | |
10369 | ||
10370 | static void | |
10371 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10372 | { | |
10373 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
10374 | const struct dwop_section_names *names = &dwop_section_names; | |
10375 | ||
10376 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10377 | { | |
73869dc2 | 10378 | dwo_sections->abbrev.s.asection = sectp; |
80626a55 DE |
10379 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10380 | } | |
10381 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10382 | { | |
73869dc2 | 10383 | dwo_sections->info.s.asection = sectp; |
80626a55 DE |
10384 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10385 | } | |
10386 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10387 | { | |
73869dc2 | 10388 | dwo_sections->line.s.asection = sectp; |
80626a55 DE |
10389 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10390 | } | |
10391 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10392 | { | |
73869dc2 | 10393 | dwo_sections->loc.s.asection = sectp; |
80626a55 DE |
10394 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10395 | } | |
10396 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10397 | { | |
73869dc2 | 10398 | dwo_sections->macinfo.s.asection = sectp; |
80626a55 DE |
10399 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10400 | } | |
10401 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10402 | { | |
73869dc2 | 10403 | dwo_sections->macro.s.asection = sectp; |
80626a55 DE |
10404 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10405 | } | |
10406 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10407 | { | |
73869dc2 | 10408 | dwo_sections->str.s.asection = sectp; |
80626a55 DE |
10409 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10410 | } | |
10411 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10412 | { | |
73869dc2 | 10413 | dwo_sections->str_offsets.s.asection = sectp; |
80626a55 DE |
10414 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10415 | } | |
10416 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10417 | { | |
10418 | struct dwarf2_section_info type_section; | |
10419 | ||
10420 | memset (&type_section, 0, sizeof (type_section)); | |
73869dc2 | 10421 | type_section.s.asection = sectp; |
80626a55 DE |
10422 | type_section.size = bfd_get_section_size (sectp); |
10423 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10424 | &type_section); | |
10425 | } | |
10426 | } | |
10427 | ||
ab5088bf | 10428 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10429 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10430 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10431 | |
10432 | static struct dwo_file * | |
0ac5b59e DE |
10433 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10434 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10435 | { |
10436 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10437 | struct dwo_file *dwo_file; |
10438 | bfd *dbfd; | |
3019eac3 DE |
10439 | struct cleanup *cleanups; |
10440 | ||
ab5088bf | 10441 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
10442 | if (dbfd == NULL) |
10443 | { | |
10444 | if (dwarf2_read_debug) | |
10445 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
10446 | return NULL; | |
10447 | } | |
10448 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10449 | dwo_file->dwo_name = dwo_name; |
10450 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 10451 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
10452 | |
10453 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10454 | ||
80626a55 | 10455 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 10456 | |
19c3d4c9 | 10457 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
10458 | |
10459 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
10460 | dwo_file->sections.types); | |
10461 | ||
10462 | discard_cleanups (cleanups); | |
10463 | ||
80626a55 DE |
10464 | if (dwarf2_read_debug) |
10465 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
10466 | ||
3019eac3 DE |
10467 | return dwo_file; |
10468 | } | |
10469 | ||
80626a55 | 10470 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10471 | size of each of the DWP debugging sections common to version 1 and 2 that |
10472 | we are interested in. */ | |
3019eac3 | 10473 | |
80626a55 | 10474 | static void |
73869dc2 DE |
10475 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10476 | void *dwp_file_ptr) | |
3019eac3 | 10477 | { |
80626a55 DE |
10478 | struct dwp_file *dwp_file = dwp_file_ptr; |
10479 | const struct dwop_section_names *names = &dwop_section_names; | |
10480 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10481 | |
80626a55 | 10482 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10483 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10484 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10485 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10486 | |
80626a55 DE |
10487 | /* Look for specific sections that we need. */ |
10488 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10489 | { | |
73869dc2 | 10490 | dwp_file->sections.str.s.asection = sectp; |
80626a55 DE |
10491 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10492 | } | |
10493 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10494 | { | |
73869dc2 | 10495 | dwp_file->sections.cu_index.s.asection = sectp; |
80626a55 DE |
10496 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10497 | } | |
10498 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10499 | { | |
73869dc2 | 10500 | dwp_file->sections.tu_index.s.asection = sectp; |
80626a55 DE |
10501 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10502 | } | |
10503 | } | |
3019eac3 | 10504 | |
73869dc2 DE |
10505 | /* This function is mapped across the sections and remembers the offset and |
10506 | size of each of the DWP version 2 debugging sections that we are interested | |
10507 | in. This is split into a separate function because we don't know if we | |
10508 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10509 | ||
10510 | static void | |
10511 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10512 | { | |
10513 | struct dwp_file *dwp_file = dwp_file_ptr; | |
10514 | const struct dwop_section_names *names = &dwop_section_names; | |
10515 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10516 | ||
10517 | /* Record the ELF section number for later lookup: this is what the | |
10518 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10519 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10520 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10521 | ||
10522 | /* Look for specific sections that we need. */ | |
10523 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10524 | { | |
10525 | dwp_file->sections.abbrev.s.asection = sectp; | |
10526 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); | |
10527 | } | |
10528 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10529 | { | |
10530 | dwp_file->sections.info.s.asection = sectp; | |
10531 | dwp_file->sections.info.size = bfd_get_section_size (sectp); | |
10532 | } | |
10533 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10534 | { | |
10535 | dwp_file->sections.line.s.asection = sectp; | |
10536 | dwp_file->sections.line.size = bfd_get_section_size (sectp); | |
10537 | } | |
10538 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10539 | { | |
10540 | dwp_file->sections.loc.s.asection = sectp; | |
10541 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); | |
10542 | } | |
10543 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10544 | { | |
10545 | dwp_file->sections.macinfo.s.asection = sectp; | |
10546 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); | |
10547 | } | |
10548 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10549 | { | |
10550 | dwp_file->sections.macro.s.asection = sectp; | |
10551 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); | |
10552 | } | |
10553 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10554 | { | |
10555 | dwp_file->sections.str_offsets.s.asection = sectp; | |
10556 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); | |
10557 | } | |
10558 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10559 | { | |
10560 | dwp_file->sections.types.s.asection = sectp; | |
10561 | dwp_file->sections.types.size = bfd_get_section_size (sectp); | |
10562 | } | |
10563 | } | |
10564 | ||
80626a55 | 10565 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10566 | |
80626a55 DE |
10567 | static hashval_t |
10568 | hash_dwp_loaded_cutus (const void *item) | |
10569 | { | |
10570 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 10571 | |
80626a55 DE |
10572 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
10573 | return dwo_unit->signature; | |
3019eac3 DE |
10574 | } |
10575 | ||
80626a55 | 10576 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10577 | |
80626a55 DE |
10578 | static int |
10579 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 10580 | { |
80626a55 DE |
10581 | const struct dwo_unit *dua = a; |
10582 | const struct dwo_unit *dub = b; | |
3019eac3 | 10583 | |
80626a55 DE |
10584 | return dua->signature == dub->signature; |
10585 | } | |
3019eac3 | 10586 | |
80626a55 | 10587 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10588 | |
80626a55 DE |
10589 | static htab_t |
10590 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
10591 | { | |
10592 | return htab_create_alloc_ex (3, | |
10593 | hash_dwp_loaded_cutus, | |
10594 | eq_dwp_loaded_cutus, | |
10595 | NULL, | |
10596 | &objfile->objfile_obstack, | |
10597 | hashtab_obstack_allocate, | |
10598 | dummy_obstack_deallocate); | |
10599 | } | |
3019eac3 | 10600 | |
ab5088bf DE |
10601 | /* Try to open DWP file FILE_NAME. |
10602 | The result is the bfd handle of the file. | |
10603 | If there is a problem finding or opening the file, return NULL. | |
10604 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10605 | same as symfile_bfd_open. */ | |
10606 | ||
10607 | static bfd * | |
10608 | open_dwp_file (const char *file_name) | |
10609 | { | |
6ac97d4c DE |
10610 | bfd *abfd; |
10611 | ||
10612 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
10613 | if (abfd != NULL) | |
10614 | return abfd; | |
10615 | ||
10616 | /* Work around upstream bug 15652. | |
10617 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
10618 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
10619 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
10620 | of the executable's path may have discarded the needed info. | |
10621 | [IWBN if the dwp file name was recorded in the executable, akin to | |
10622 | .gnu_debuglink, but that doesn't exist yet.] | |
10623 | Strip the directory from FILE_NAME and search again. */ | |
10624 | if (*debug_file_directory != '\0') | |
10625 | { | |
10626 | /* Don't implicitly search the current directory here. | |
10627 | If the user wants to search "." to handle this case, | |
10628 | it must be added to debug-file-directory. */ | |
10629 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
10630 | 0 /*search_cwd*/); | |
10631 | } | |
10632 | ||
10633 | return NULL; | |
ab5088bf DE |
10634 | } |
10635 | ||
80626a55 DE |
10636 | /* Initialize the use of the DWP file for the current objfile. |
10637 | By convention the name of the DWP file is ${objfile}.dwp. | |
10638 | The result is NULL if it can't be found. */ | |
a766d390 | 10639 | |
80626a55 | 10640 | static struct dwp_file * |
ab5088bf | 10641 | open_and_init_dwp_file (void) |
80626a55 DE |
10642 | { |
10643 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10644 | struct dwp_file *dwp_file; | |
10645 | char *dwp_name; | |
10646 | bfd *dbfd; | |
10647 | struct cleanup *cleanups; | |
10648 | ||
82bf32bc JK |
10649 | /* Try to find first .dwp for the binary file before any symbolic links |
10650 | resolving. */ | |
10651 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
80626a55 DE |
10652 | cleanups = make_cleanup (xfree, dwp_name); |
10653 | ||
ab5088bf | 10654 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
10655 | if (dbfd == NULL |
10656 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
10657 | { | |
10658 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
10659 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
10660 | make_cleanup (xfree, dwp_name); | |
10661 | dbfd = open_dwp_file (dwp_name); | |
10662 | } | |
10663 | ||
80626a55 DE |
10664 | if (dbfd == NULL) |
10665 | { | |
10666 | if (dwarf2_read_debug) | |
10667 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
10668 | do_cleanups (cleanups); | |
10669 | return NULL; | |
3019eac3 | 10670 | } |
80626a55 | 10671 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 10672 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
10673 | dwp_file->dbfd = dbfd; |
10674 | do_cleanups (cleanups); | |
c906108c | 10675 | |
80626a55 DE |
10676 | /* +1: section 0 is unused */ |
10677 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
10678 | dwp_file->elf_sections = | |
10679 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
10680 | dwp_file->num_sections, asection *); | |
10681 | ||
73869dc2 | 10682 | bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file); |
80626a55 DE |
10683 | |
10684 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
10685 | ||
10686 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
10687 | ||
73869dc2 DE |
10688 | /* The DWP file version is stored in the hash table. Oh well. */ |
10689 | if (dwp_file->cus->version != dwp_file->tus->version) | |
10690 | { | |
10691 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 10692 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 10693 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
10694 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
10695 | " TU version %s [in DWP file %s]"), | |
10696 | pulongest (dwp_file->cus->version), | |
10697 | pulongest (dwp_file->tus->version), dwp_name); | |
73869dc2 DE |
10698 | } |
10699 | dwp_file->version = dwp_file->cus->version; | |
10700 | ||
10701 | if (dwp_file->version == 2) | |
10702 | bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file); | |
10703 | ||
19ac8c2e DE |
10704 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
10705 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 10706 | |
80626a55 DE |
10707 | if (dwarf2_read_debug) |
10708 | { | |
10709 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
10710 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
10711 | " %s CUs, %s TUs\n", |
10712 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
10713 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
10714 | } |
10715 | ||
10716 | return dwp_file; | |
3019eac3 | 10717 | } |
c906108c | 10718 | |
ab5088bf DE |
10719 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
10720 | ||
10721 | static struct dwp_file * | |
10722 | get_dwp_file (void) | |
10723 | { | |
10724 | if (! dwarf2_per_objfile->dwp_checked) | |
10725 | { | |
10726 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
10727 | dwarf2_per_objfile->dwp_checked = 1; | |
10728 | } | |
10729 | return dwarf2_per_objfile->dwp_file; | |
10730 | } | |
10731 | ||
80626a55 DE |
10732 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
10733 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
10734 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 10735 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
10736 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
10737 | ||
10738 | This is called, for example, when wanting to read a variable with a | |
10739 | complex location. Therefore we don't want to do file i/o for every call. | |
10740 | Therefore we don't want to look for a DWO file on every call. | |
10741 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
10742 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
10743 | for a DWO file. | |
10744 | ||
1c658ad5 | 10745 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 10746 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 10747 | |
3019eac3 | 10748 | static struct dwo_unit * |
80626a55 DE |
10749 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
10750 | const char *dwo_name, const char *comp_dir, | |
10751 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
10752 | { |
10753 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10754 | const char *kind = is_debug_types ? "TU" : "CU"; |
10755 | void **dwo_file_slot; | |
3019eac3 | 10756 | struct dwo_file *dwo_file; |
80626a55 | 10757 | struct dwp_file *dwp_file; |
cb1df416 | 10758 | |
6a506a2d DE |
10759 | /* First see if there's a DWP file. |
10760 | If we have a DWP file but didn't find the DWO inside it, don't | |
10761 | look for the original DWO file. It makes gdb behave differently | |
10762 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 10763 | |
ab5088bf | 10764 | dwp_file = get_dwp_file (); |
80626a55 | 10765 | if (dwp_file != NULL) |
cf2c3c16 | 10766 | { |
80626a55 DE |
10767 | const struct dwp_hash_table *dwp_htab = |
10768 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10769 | ||
10770 | if (dwp_htab != NULL) | |
10771 | { | |
10772 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
10773 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
10774 | signature, is_debug_types); | |
80626a55 DE |
10775 | |
10776 | if (dwo_cutu != NULL) | |
10777 | { | |
10778 | if (dwarf2_read_debug) | |
10779 | { | |
10780 | fprintf_unfiltered (gdb_stdlog, | |
10781 | "Virtual DWO %s %s found: @%s\n", | |
10782 | kind, hex_string (signature), | |
10783 | host_address_to_string (dwo_cutu)); | |
10784 | } | |
10785 | return dwo_cutu; | |
10786 | } | |
10787 | } | |
10788 | } | |
6a506a2d | 10789 | else |
80626a55 | 10790 | { |
6a506a2d | 10791 | /* No DWP file, look for the DWO file. */ |
80626a55 | 10792 | |
6a506a2d DE |
10793 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
10794 | if (*dwo_file_slot == NULL) | |
80626a55 | 10795 | { |
6a506a2d DE |
10796 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
10797 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 10798 | } |
6a506a2d DE |
10799 | /* NOTE: This will be NULL if unable to open the file. */ |
10800 | dwo_file = *dwo_file_slot; | |
3019eac3 | 10801 | |
6a506a2d | 10802 | if (dwo_file != NULL) |
19c3d4c9 | 10803 | { |
6a506a2d DE |
10804 | struct dwo_unit *dwo_cutu = NULL; |
10805 | ||
10806 | if (is_debug_types && dwo_file->tus) | |
10807 | { | |
10808 | struct dwo_unit find_dwo_cutu; | |
10809 | ||
10810 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
10811 | find_dwo_cutu.signature = signature; | |
10812 | dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu); | |
10813 | } | |
10814 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 10815 | { |
6a506a2d DE |
10816 | if (signature == dwo_file->cu->signature) |
10817 | dwo_cutu = dwo_file->cu; | |
10818 | } | |
10819 | ||
10820 | if (dwo_cutu != NULL) | |
10821 | { | |
10822 | if (dwarf2_read_debug) | |
10823 | { | |
10824 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
10825 | kind, dwo_name, hex_string (signature), | |
10826 | host_address_to_string (dwo_cutu)); | |
10827 | } | |
10828 | return dwo_cutu; | |
80626a55 DE |
10829 | } |
10830 | } | |
2e276125 | 10831 | } |
9cdd5dbd | 10832 | |
80626a55 DE |
10833 | /* We didn't find it. This could mean a dwo_id mismatch, or |
10834 | someone deleted the DWO/DWP file, or the search path isn't set up | |
10835 | correctly to find the file. */ | |
10836 | ||
10837 | if (dwarf2_read_debug) | |
10838 | { | |
10839 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
10840 | kind, dwo_name, hex_string (signature)); | |
10841 | } | |
3019eac3 | 10842 | |
6656a72d DE |
10843 | /* This is a warning and not a complaint because it can be caused by |
10844 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
10845 | { |
10846 | /* Print the name of the DWP file if we looked there, helps the user | |
10847 | better diagnose the problem. */ | |
10848 | char *dwp_text = NULL; | |
10849 | struct cleanup *cleanups; | |
10850 | ||
10851 | if (dwp_file != NULL) | |
10852 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
10853 | cleanups = make_cleanup (xfree, dwp_text); | |
10854 | ||
10855 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
10856 | " [in module %s]"), | |
10857 | kind, dwo_name, hex_string (signature), | |
10858 | dwp_text != NULL ? dwp_text : "", | |
10859 | this_unit->is_debug_types ? "TU" : "CU", | |
10860 | this_unit->offset.sect_off, objfile_name (objfile)); | |
10861 | ||
10862 | do_cleanups (cleanups); | |
10863 | } | |
3019eac3 | 10864 | return NULL; |
5fb290d7 DJ |
10865 | } |
10866 | ||
80626a55 DE |
10867 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
10868 | See lookup_dwo_cutu_unit for details. */ | |
10869 | ||
10870 | static struct dwo_unit * | |
10871 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
10872 | const char *dwo_name, const char *comp_dir, | |
10873 | ULONGEST signature) | |
10874 | { | |
10875 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
10876 | } | |
10877 | ||
10878 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
10879 | See lookup_dwo_cutu_unit for details. */ | |
10880 | ||
10881 | static struct dwo_unit * | |
10882 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
10883 | const char *dwo_name, const char *comp_dir) | |
10884 | { | |
10885 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
10886 | } | |
10887 | ||
89e63ee4 DE |
10888 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
10889 | ||
10890 | static int | |
10891 | queue_and_load_dwo_tu (void **slot, void *info) | |
10892 | { | |
10893 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
10894 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
10895 | ULONGEST signature = dwo_unit->signature; | |
10896 | struct signatured_type *sig_type = | |
10897 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
10898 | ||
10899 | if (sig_type != NULL) | |
10900 | { | |
10901 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
10902 | ||
10903 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
10904 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
10905 | while processing PER_CU. */ | |
10906 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
10907 | load_full_type_unit (sig_cu); | |
10908 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
10909 | } | |
10910 | ||
10911 | return 1; | |
10912 | } | |
10913 | ||
10914 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
10915 | The DWO may have the only definition of the type, though it may not be | |
10916 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
10917 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
10918 | ||
10919 | static void | |
10920 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
10921 | { | |
10922 | struct dwo_unit *dwo_unit; | |
10923 | struct dwo_file *dwo_file; | |
10924 | ||
10925 | gdb_assert (!per_cu->is_debug_types); | |
10926 | gdb_assert (get_dwp_file () == NULL); | |
10927 | gdb_assert (per_cu->cu != NULL); | |
10928 | ||
10929 | dwo_unit = per_cu->cu->dwo_unit; | |
10930 | gdb_assert (dwo_unit != NULL); | |
10931 | ||
10932 | dwo_file = dwo_unit->dwo_file; | |
10933 | if (dwo_file->tus != NULL) | |
10934 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
10935 | } | |
10936 | ||
3019eac3 DE |
10937 | /* Free all resources associated with DWO_FILE. |
10938 | Close the DWO file and munmap the sections. | |
10939 | All memory should be on the objfile obstack. */ | |
348e048f DE |
10940 | |
10941 | static void | |
3019eac3 | 10942 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 10943 | { |
3019eac3 DE |
10944 | int ix; |
10945 | struct dwarf2_section_info *section; | |
348e048f | 10946 | |
5c6fa7ab | 10947 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 10948 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 10949 | |
3019eac3 DE |
10950 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
10951 | } | |
348e048f | 10952 | |
3019eac3 | 10953 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 10954 | |
3019eac3 DE |
10955 | static void |
10956 | free_dwo_file_cleanup (void *arg) | |
10957 | { | |
10958 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
10959 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 10960 | |
3019eac3 DE |
10961 | free_dwo_file (dwo_file, objfile); |
10962 | } | |
348e048f | 10963 | |
3019eac3 | 10964 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 10965 | |
3019eac3 DE |
10966 | static int |
10967 | free_dwo_file_from_slot (void **slot, void *info) | |
10968 | { | |
10969 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
10970 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 10971 | |
3019eac3 | 10972 | free_dwo_file (dwo_file, objfile); |
348e048f | 10973 | |
3019eac3 DE |
10974 | return 1; |
10975 | } | |
348e048f | 10976 | |
3019eac3 | 10977 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 10978 | |
3019eac3 DE |
10979 | static void |
10980 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
10981 | { | |
10982 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 10983 | } |
3019eac3 DE |
10984 | \f |
10985 | /* Read in various DIEs. */ | |
348e048f | 10986 | |
d389af10 JK |
10987 | /* qsort helper for inherit_abstract_dies. */ |
10988 | ||
10989 | static int | |
10990 | unsigned_int_compar (const void *ap, const void *bp) | |
10991 | { | |
10992 | unsigned int a = *(unsigned int *) ap; | |
10993 | unsigned int b = *(unsigned int *) bp; | |
10994 | ||
10995 | return (a > b) - (b > a); | |
10996 | } | |
10997 | ||
10998 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
10999 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11000 | already referenced by DW_AT_abstract_origin from the children of the | |
11001 | current DIE. */ | |
d389af10 JK |
11002 | |
11003 | static void | |
11004 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11005 | { | |
11006 | struct die_info *child_die; | |
11007 | unsigned die_children_count; | |
11008 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
11009 | sect_offset *offsets; |
11010 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
11011 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11012 | struct die_info *origin_die; | |
11013 | /* Iterator of the ORIGIN_DIE children. */ | |
11014 | struct die_info *origin_child_die; | |
11015 | struct cleanup *cleanups; | |
11016 | struct attribute *attr; | |
cd02d79d PA |
11017 | struct dwarf2_cu *origin_cu; |
11018 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11019 | |
11020 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11021 | if (!attr) | |
11022 | return; | |
11023 | ||
cd02d79d PA |
11024 | /* Note that following die references may follow to a die in a |
11025 | different cu. */ | |
11026 | ||
11027 | origin_cu = cu; | |
11028 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11029 | ||
11030 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11031 | symbols in. */ | |
11032 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11033 | origin_cu->list_in_scope = cu->list_in_scope; | |
11034 | ||
edb3359d DJ |
11035 | if (die->tag != origin_die->tag |
11036 | && !(die->tag == DW_TAG_inlined_subroutine | |
11037 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11038 | complaint (&symfile_complaints, |
11039 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 11040 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
11041 | |
11042 | child_die = die->child; | |
11043 | die_children_count = 0; | |
11044 | while (child_die && child_die->tag) | |
11045 | { | |
11046 | child_die = sibling_die (child_die); | |
11047 | die_children_count++; | |
11048 | } | |
11049 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
11050 | cleanups = make_cleanup (xfree, offsets); | |
11051 | ||
11052 | offsets_end = offsets; | |
11053 | child_die = die->child; | |
11054 | while (child_die && child_die->tag) | |
11055 | { | |
c38f313d DJ |
11056 | /* For each CHILD_DIE, find the corresponding child of |
11057 | ORIGIN_DIE. If there is more than one layer of | |
11058 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11059 | but GCC versions at least through 4.4 generate this (GCC PR | |
11060 | 40573). */ | |
11061 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 11062 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 11063 | |
c38f313d DJ |
11064 | while (1) |
11065 | { | |
cd02d79d PA |
11066 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11067 | child_origin_cu); | |
c38f313d DJ |
11068 | if (attr == NULL) |
11069 | break; | |
cd02d79d PA |
11070 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11071 | &child_origin_cu); | |
c38f313d DJ |
11072 | } |
11073 | ||
d389af10 JK |
11074 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11075 | counterpart may exist. */ | |
c38f313d | 11076 | if (child_origin_die != child_die) |
d389af10 | 11077 | { |
edb3359d DJ |
11078 | if (child_die->tag != child_origin_die->tag |
11079 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11080 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11081 | complaint (&symfile_complaints, |
11082 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11083 | "different tags"), child_die->offset.sect_off, |
11084 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11085 | if (child_origin_die->parent != origin_die) |
11086 | complaint (&symfile_complaints, | |
11087 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
11088 | "different parents"), child_die->offset.sect_off, |
11089 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
11090 | else |
11091 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
11092 | } |
11093 | child_die = sibling_die (child_die); | |
11094 | } | |
11095 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11096 | unsigned_int_compar); | |
11097 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 11098 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
11099 | complaint (&symfile_complaints, |
11100 | _("Multiple children of DIE 0x%x refer " | |
11101 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 11102 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
11103 | |
11104 | offsetp = offsets; | |
11105 | origin_child_die = origin_die->child; | |
11106 | while (origin_child_die && origin_child_die->tag) | |
11107 | { | |
11108 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
11109 | while (offsetp < offsets_end |
11110 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 11111 | offsetp++; |
b64f50a1 JK |
11112 | if (offsetp >= offsets_end |
11113 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 | 11114 | { |
adde2bff DE |
11115 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11116 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11117 | This can happen with mutually referenced abstract_origins. | |
11118 | PR 16581. */ | |
11119 | if (!origin_child_die->in_process) | |
11120 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11121 | } |
11122 | origin_child_die = sibling_die (origin_child_die); | |
11123 | } | |
cd02d79d | 11124 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11125 | |
11126 | do_cleanups (cleanups); | |
11127 | } | |
11128 | ||
c906108c | 11129 | static void |
e7c27a73 | 11130 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11131 | { |
e7c27a73 | 11132 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 11133 | struct context_stack *new; |
c906108c SS |
11134 | CORE_ADDR lowpc; |
11135 | CORE_ADDR highpc; | |
11136 | struct die_info *child_die; | |
edb3359d | 11137 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11138 | const char *name; |
e142c38c | 11139 | CORE_ADDR baseaddr; |
801e3a5b | 11140 | struct block *block; |
edb3359d | 11141 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11142 | VEC (symbolp) *template_args = NULL; |
11143 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11144 | |
11145 | if (inlined_func) | |
11146 | { | |
11147 | /* If we do not have call site information, we can't show the | |
11148 | caller of this inlined function. That's too confusing, so | |
11149 | only use the scope for local variables. */ | |
11150 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11151 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11152 | if (call_line == NULL || call_file == NULL) | |
11153 | { | |
11154 | read_lexical_block_scope (die, cu); | |
11155 | return; | |
11156 | } | |
11157 | } | |
c906108c | 11158 | |
e142c38c DJ |
11159 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11160 | ||
94af9270 | 11161 | name = dwarf2_name (die, cu); |
c906108c | 11162 | |
e8d05480 JB |
11163 | /* Ignore functions with missing or empty names. These are actually |
11164 | illegal according to the DWARF standard. */ | |
11165 | if (name == NULL) | |
11166 | { | |
11167 | complaint (&symfile_complaints, | |
b64f50a1 JK |
11168 | _("missing name for subprogram DIE at %d"), |
11169 | die->offset.sect_off); | |
e8d05480 JB |
11170 | return; |
11171 | } | |
11172 | ||
11173 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
11174 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
11175 | { | |
ae4d0c03 PM |
11176 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11177 | if (!attr || !DW_UNSND (attr)) | |
11178 | complaint (&symfile_complaints, | |
3e43a32a MS |
11179 | _("cannot get low and high bounds " |
11180 | "for subprogram DIE at %d"), | |
b64f50a1 | 11181 | die->offset.sect_off); |
e8d05480 JB |
11182 | return; |
11183 | } | |
c906108c SS |
11184 | |
11185 | lowpc += baseaddr; | |
11186 | highpc += baseaddr; | |
11187 | ||
34eaf542 TT |
11188 | /* If we have any template arguments, then we must allocate a |
11189 | different sort of symbol. */ | |
11190 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11191 | { | |
11192 | if (child_die->tag == DW_TAG_template_type_param | |
11193 | || child_die->tag == DW_TAG_template_value_param) | |
11194 | { | |
e623cf5d | 11195 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11196 | templ_func->base.is_cplus_template_function = 1; |
11197 | break; | |
11198 | } | |
11199 | } | |
11200 | ||
c906108c | 11201 | new = push_context (0, lowpc); |
34eaf542 TT |
11202 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
11203 | (struct symbol *) templ_func); | |
4c2df51b | 11204 | |
4cecd739 DJ |
11205 | /* If there is a location expression for DW_AT_frame_base, record |
11206 | it. */ | |
e142c38c | 11207 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11208 | if (attr) |
f1e6e072 | 11209 | dwarf2_symbol_mark_computed (attr, new->name, cu, 1); |
4c2df51b | 11210 | |
e142c38c | 11211 | cu->list_in_scope = &local_symbols; |
c906108c | 11212 | |
639d11d3 | 11213 | if (die->child != NULL) |
c906108c | 11214 | { |
639d11d3 | 11215 | child_die = die->child; |
c906108c SS |
11216 | while (child_die && child_die->tag) |
11217 | { | |
34eaf542 TT |
11218 | if (child_die->tag == DW_TAG_template_type_param |
11219 | || child_die->tag == DW_TAG_template_value_param) | |
11220 | { | |
11221 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11222 | ||
f1078f66 DJ |
11223 | if (arg != NULL) |
11224 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11225 | } |
11226 | else | |
11227 | process_die (child_die, cu); | |
c906108c SS |
11228 | child_die = sibling_die (child_die); |
11229 | } | |
11230 | } | |
11231 | ||
d389af10 JK |
11232 | inherit_abstract_dies (die, cu); |
11233 | ||
4a811a97 UW |
11234 | /* If we have a DW_AT_specification, we might need to import using |
11235 | directives from the context of the specification DIE. See the | |
11236 | comment in determine_prefix. */ | |
11237 | if (cu->language == language_cplus | |
11238 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11239 | { | |
11240 | struct dwarf2_cu *spec_cu = cu; | |
11241 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11242 | ||
11243 | while (spec_die) | |
11244 | { | |
11245 | child_die = spec_die->child; | |
11246 | while (child_die && child_die->tag) | |
11247 | { | |
11248 | if (child_die->tag == DW_TAG_imported_module) | |
11249 | process_die (child_die, spec_cu); | |
11250 | child_die = sibling_die (child_die); | |
11251 | } | |
11252 | ||
11253 | /* In some cases, GCC generates specification DIEs that | |
11254 | themselves contain DW_AT_specification attributes. */ | |
11255 | spec_die = die_specification (spec_die, &spec_cu); | |
11256 | } | |
11257 | } | |
11258 | ||
c906108c SS |
11259 | new = pop_context (); |
11260 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
11261 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
11262 | lowpc, highpc, objfile); | |
11263 | ||
df8a16a1 | 11264 | /* For C++, set the block's scope. */ |
195a3f6c | 11265 | if ((cu->language == language_cplus || cu->language == language_fortran) |
4d4ec4e5 | 11266 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11267 | block_set_scope (block, determine_prefix (die, cu), |
11268 | &objfile->objfile_obstack); | |
df8a16a1 | 11269 | |
801e3a5b JB |
11270 | /* If we have address ranges, record them. */ |
11271 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11272 | |
34eaf542 TT |
11273 | /* Attach template arguments to function. */ |
11274 | if (! VEC_empty (symbolp, template_args)) | |
11275 | { | |
11276 | gdb_assert (templ_func != NULL); | |
11277 | ||
11278 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11279 | templ_func->template_arguments | |
11280 | = obstack_alloc (&objfile->objfile_obstack, | |
11281 | (templ_func->n_template_arguments | |
11282 | * sizeof (struct symbol *))); | |
11283 | memcpy (templ_func->template_arguments, | |
11284 | VEC_address (symbolp, template_args), | |
11285 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11286 | VEC_free (symbolp, template_args); | |
11287 | } | |
11288 | ||
208d8187 JB |
11289 | /* In C++, we can have functions nested inside functions (e.g., when |
11290 | a function declares a class that has methods). This means that | |
11291 | when we finish processing a function scope, we may need to go | |
11292 | back to building a containing block's symbol lists. */ | |
11293 | local_symbols = new->locals; | |
27aa8d6a | 11294 | using_directives = new->using_directives; |
208d8187 | 11295 | |
921e78cf JB |
11296 | /* If we've finished processing a top-level function, subsequent |
11297 | symbols go in the file symbol list. */ | |
11298 | if (outermost_context_p ()) | |
e142c38c | 11299 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11300 | } |
11301 | ||
11302 | /* Process all the DIES contained within a lexical block scope. Start | |
11303 | a new scope, process the dies, and then close the scope. */ | |
11304 | ||
11305 | static void | |
e7c27a73 | 11306 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11307 | { |
e7c27a73 | 11308 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 11309 | struct context_stack *new; |
c906108c SS |
11310 | CORE_ADDR lowpc, highpc; |
11311 | struct die_info *child_die; | |
e142c38c DJ |
11312 | CORE_ADDR baseaddr; |
11313 | ||
11314 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11315 | |
11316 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11317 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11318 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11319 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11320 | describe ranges. */ |
d85a05f0 | 11321 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
11322 | return; |
11323 | lowpc += baseaddr; | |
11324 | highpc += baseaddr; | |
11325 | ||
11326 | push_context (0, lowpc); | |
639d11d3 | 11327 | if (die->child != NULL) |
c906108c | 11328 | { |
639d11d3 | 11329 | child_die = die->child; |
c906108c SS |
11330 | while (child_die && child_die->tag) |
11331 | { | |
e7c27a73 | 11332 | process_die (child_die, cu); |
c906108c SS |
11333 | child_die = sibling_die (child_die); |
11334 | } | |
11335 | } | |
11336 | new = pop_context (); | |
11337 | ||
8540c487 | 11338 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 11339 | { |
801e3a5b JB |
11340 | struct block *block |
11341 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
11342 | highpc, objfile); | |
11343 | ||
11344 | /* Note that recording ranges after traversing children, as we | |
11345 | do here, means that recording a parent's ranges entails | |
11346 | walking across all its children's ranges as they appear in | |
11347 | the address map, which is quadratic behavior. | |
11348 | ||
11349 | It would be nicer to record the parent's ranges before | |
11350 | traversing its children, simply overriding whatever you find | |
11351 | there. But since we don't even decide whether to create a | |
11352 | block until after we've traversed its children, that's hard | |
11353 | to do. */ | |
11354 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
11355 | } |
11356 | local_symbols = new->locals; | |
27aa8d6a | 11357 | using_directives = new->using_directives; |
c906108c SS |
11358 | } |
11359 | ||
96408a79 SA |
11360 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
11361 | ||
11362 | static void | |
11363 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11364 | { | |
11365 | struct objfile *objfile = cu->objfile; | |
11366 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11367 | CORE_ADDR pc, baseaddr; | |
11368 | struct attribute *attr; | |
11369 | struct call_site *call_site, call_site_local; | |
11370 | void **slot; | |
11371 | int nparams; | |
11372 | struct die_info *child_die; | |
11373 | ||
11374 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11375 | ||
11376 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11377 | if (!attr) | |
11378 | { | |
11379 | complaint (&symfile_complaints, | |
11380 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
11381 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11382 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11383 | return; |
11384 | } | |
31aa7e4e | 11385 | pc = attr_value_as_address (attr) + baseaddr; |
96408a79 SA |
11386 | |
11387 | if (cu->call_site_htab == NULL) | |
11388 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11389 | NULL, &objfile->objfile_obstack, | |
11390 | hashtab_obstack_allocate, NULL); | |
11391 | call_site_local.pc = pc; | |
11392 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11393 | if (*slot != NULL) | |
11394 | { | |
11395 | complaint (&symfile_complaints, | |
11396 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
11397 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
11398 | paddress (gdbarch, pc), die->offset.sect_off, |
11399 | objfile_name (objfile)); | |
96408a79 SA |
11400 | return; |
11401 | } | |
11402 | ||
11403 | /* Count parameters at the caller. */ | |
11404 | ||
11405 | nparams = 0; | |
11406 | for (child_die = die->child; child_die && child_die->tag; | |
11407 | child_die = sibling_die (child_die)) | |
11408 | { | |
11409 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11410 | { | |
11411 | complaint (&symfile_complaints, | |
11412 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
11413 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
11414 | child_die->tag, child_die->offset.sect_off, |
11415 | objfile_name (objfile)); | |
96408a79 SA |
11416 | continue; |
11417 | } | |
11418 | ||
11419 | nparams++; | |
11420 | } | |
11421 | ||
11422 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
11423 | (sizeof (*call_site) | |
11424 | + (sizeof (*call_site->parameter) | |
11425 | * (nparams - 1)))); | |
11426 | *slot = call_site; | |
11427 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11428 | call_site->pc = pc; | |
11429 | ||
11430 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
11431 | { | |
11432 | struct die_info *func_die; | |
11433 | ||
11434 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11435 | for (func_die = die->parent; | |
11436 | func_die && func_die->tag != DW_TAG_subprogram | |
11437 | && func_die->tag != DW_TAG_subroutine_type; | |
11438 | func_die = func_die->parent); | |
11439 | ||
11440 | /* DW_AT_GNU_all_call_sites is a superset | |
11441 | of DW_AT_GNU_all_tail_call_sites. */ | |
11442 | if (func_die | |
11443 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
11444 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
11445 | { | |
11446 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11447 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11448 | both the initial caller containing the real return address PC and | |
11449 | the final callee containing the current PC of a chain of tail | |
11450 | calls do not need to have the tail call list complete. But any | |
11451 | function candidate for a virtual tail call frame searched via | |
11452 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11453 | determined unambiguously. */ | |
11454 | } | |
11455 | else | |
11456 | { | |
11457 | struct type *func_type = NULL; | |
11458 | ||
11459 | if (func_die) | |
11460 | func_type = get_die_type (func_die, cu); | |
11461 | if (func_type != NULL) | |
11462 | { | |
11463 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11464 | ||
11465 | /* Enlist this call site to the function. */ | |
11466 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11467 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11468 | } | |
11469 | else | |
11470 | complaint (&symfile_complaints, | |
11471 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
11472 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11473 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11474 | } |
11475 | } | |
11476 | ||
11477 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11478 | if (attr == NULL) | |
11479 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11480 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
11481 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
11482 | /* Keep NULL DWARF_BLOCK. */; | |
11483 | else if (attr_form_is_block (attr)) | |
11484 | { | |
11485 | struct dwarf2_locexpr_baton *dlbaton; | |
11486 | ||
11487 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
11488 | dlbaton->data = DW_BLOCK (attr)->data; | |
11489 | dlbaton->size = DW_BLOCK (attr)->size; | |
11490 | dlbaton->per_cu = cu->per_cu; | |
11491 | ||
11492 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
11493 | } | |
7771576e | 11494 | else if (attr_form_is_ref (attr)) |
96408a79 | 11495 | { |
96408a79 SA |
11496 | struct dwarf2_cu *target_cu = cu; |
11497 | struct die_info *target_die; | |
11498 | ||
ac9ec31b | 11499 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
11500 | gdb_assert (target_cu->objfile == objfile); |
11501 | if (die_is_declaration (target_die, target_cu)) | |
11502 | { | |
9112db09 JK |
11503 | const char *target_physname = NULL; |
11504 | struct attribute *target_attr; | |
11505 | ||
11506 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
11507 | target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu); | |
11508 | if (target_attr == NULL) | |
11509 | target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name, | |
11510 | target_cu); | |
11511 | if (target_attr != NULL && DW_STRING (target_attr) != NULL) | |
11512 | target_physname = DW_STRING (target_attr); | |
11513 | else | |
11514 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
96408a79 SA |
11515 | if (target_physname == NULL) |
11516 | complaint (&symfile_complaints, | |
11517 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11518 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11519 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11520 | else |
7d455152 | 11521 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
11522 | } |
11523 | else | |
11524 | { | |
11525 | CORE_ADDR lowpc; | |
11526 | ||
11527 | /* DW_AT_entry_pc should be preferred. */ | |
11528 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
11529 | complaint (&symfile_complaints, | |
11530 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11531 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11532 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11533 | else |
11534 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
11535 | } | |
11536 | } | |
11537 | else | |
11538 | complaint (&symfile_complaints, | |
11539 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
11540 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 11541 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11542 | |
11543 | call_site->per_cu = cu->per_cu; | |
11544 | ||
11545 | for (child_die = die->child; | |
11546 | child_die && child_die->tag; | |
11547 | child_die = sibling_die (child_die)) | |
11548 | { | |
96408a79 | 11549 | struct call_site_parameter *parameter; |
1788b2d3 | 11550 | struct attribute *loc, *origin; |
96408a79 SA |
11551 | |
11552 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11553 | { | |
11554 | /* Already printed the complaint above. */ | |
11555 | continue; | |
11556 | } | |
11557 | ||
11558 | gdb_assert (call_site->parameter_count < nparams); | |
11559 | parameter = &call_site->parameter[call_site->parameter_count]; | |
11560 | ||
1788b2d3 JK |
11561 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
11562 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
11563 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 11564 | |
24c5c679 | 11565 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 11566 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 11567 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
11568 | { |
11569 | sect_offset offset; | |
11570 | ||
11571 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
11572 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
11573 | if (!offset_in_cu_p (&cu->header, offset)) |
11574 | { | |
11575 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
11576 | binding can be done only inside one CU. Such referenced DIE | |
11577 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
11578 | complaint (&symfile_complaints, | |
11579 | _("DW_AT_abstract_origin offset is not in CU for " | |
11580 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11581 | "[in module %s]"), | |
4262abfb | 11582 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
11583 | continue; |
11584 | } | |
1788b2d3 JK |
11585 | parameter->u.param_offset.cu_off = (offset.sect_off |
11586 | - cu->header.offset.sect_off); | |
11587 | } | |
11588 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
11589 | { |
11590 | complaint (&symfile_complaints, | |
11591 | _("No DW_FORM_block* DW_AT_location for " | |
11592 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11593 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11594 | continue; |
11595 | } | |
24c5c679 | 11596 | else |
96408a79 | 11597 | { |
24c5c679 JK |
11598 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
11599 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
11600 | if (parameter->u.dwarf_reg != -1) | |
11601 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
11602 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
11603 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
11604 | ¶meter->u.fb_offset)) | |
11605 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
11606 | else | |
11607 | { | |
11608 | complaint (&symfile_complaints, | |
11609 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
11610 | "for DW_FORM_block* DW_AT_location is supported for " | |
11611 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11612 | "[in module %s]"), | |
4262abfb | 11613 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
11614 | continue; |
11615 | } | |
96408a79 SA |
11616 | } |
11617 | ||
11618 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
11619 | if (!attr_form_is_block (attr)) | |
11620 | { | |
11621 | complaint (&symfile_complaints, | |
11622 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
11623 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11624 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11625 | continue; |
11626 | } | |
11627 | parameter->value = DW_BLOCK (attr)->data; | |
11628 | parameter->value_size = DW_BLOCK (attr)->size; | |
11629 | ||
11630 | /* Parameters are not pre-cleared by memset above. */ | |
11631 | parameter->data_value = NULL; | |
11632 | parameter->data_value_size = 0; | |
11633 | call_site->parameter_count++; | |
11634 | ||
11635 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
11636 | if (attr) | |
11637 | { | |
11638 | if (!attr_form_is_block (attr)) | |
11639 | complaint (&symfile_complaints, | |
11640 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
11641 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11642 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11643 | else |
11644 | { | |
11645 | parameter->data_value = DW_BLOCK (attr)->data; | |
11646 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
11647 | } | |
11648 | } | |
11649 | } | |
11650 | } | |
11651 | ||
43039443 | 11652 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
11653 | Return 1 if the attributes are present and valid, otherwise, return 0. |
11654 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
11655 | |
11656 | static int | |
11657 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
11658 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
11659 | struct partial_symtab *ranges_pst) | |
43039443 JK |
11660 | { |
11661 | struct objfile *objfile = cu->objfile; | |
11662 | struct comp_unit_head *cu_header = &cu->header; | |
11663 | bfd *obfd = objfile->obfd; | |
11664 | unsigned int addr_size = cu_header->addr_size; | |
11665 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11666 | /* Base address selection entry. */ | |
11667 | CORE_ADDR base; | |
11668 | int found_base; | |
11669 | unsigned int dummy; | |
d521ce57 | 11670 | const gdb_byte *buffer; |
43039443 JK |
11671 | CORE_ADDR marker; |
11672 | int low_set; | |
11673 | CORE_ADDR low = 0; | |
11674 | CORE_ADDR high = 0; | |
ff013f42 | 11675 | CORE_ADDR baseaddr; |
43039443 | 11676 | |
d00adf39 DE |
11677 | found_base = cu->base_known; |
11678 | base = cu->base_address; | |
43039443 | 11679 | |
be391dca | 11680 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11681 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
11682 | { |
11683 | complaint (&symfile_complaints, | |
11684 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
11685 | offset); | |
11686 | return 0; | |
11687 | } | |
dce234bc | 11688 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
11689 | |
11690 | /* Read in the largest possible address. */ | |
11691 | marker = read_address (obfd, buffer, cu, &dummy); | |
11692 | if ((marker & mask) == mask) | |
11693 | { | |
11694 | /* If we found the largest possible address, then | |
11695 | read the base address. */ | |
11696 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
11697 | buffer += 2 * addr_size; | |
11698 | offset += 2 * addr_size; | |
11699 | found_base = 1; | |
11700 | } | |
11701 | ||
11702 | low_set = 0; | |
11703 | ||
e7030f15 | 11704 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 11705 | |
43039443 JK |
11706 | while (1) |
11707 | { | |
11708 | CORE_ADDR range_beginning, range_end; | |
11709 | ||
11710 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
11711 | buffer += addr_size; | |
11712 | range_end = read_address (obfd, buffer, cu, &dummy); | |
11713 | buffer += addr_size; | |
11714 | offset += 2 * addr_size; | |
11715 | ||
11716 | /* An end of list marker is a pair of zero addresses. */ | |
11717 | if (range_beginning == 0 && range_end == 0) | |
11718 | /* Found the end of list entry. */ | |
11719 | break; | |
11720 | ||
11721 | /* Each base address selection entry is a pair of 2 values. | |
11722 | The first is the largest possible address, the second is | |
11723 | the base address. Check for a base address here. */ | |
11724 | if ((range_beginning & mask) == mask) | |
11725 | { | |
11726 | /* If we found the largest possible address, then | |
11727 | read the base address. */ | |
11728 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
11729 | found_base = 1; | |
11730 | continue; | |
11731 | } | |
11732 | ||
11733 | if (!found_base) | |
11734 | { | |
11735 | /* We have no valid base address for the ranges | |
11736 | data. */ | |
11737 | complaint (&symfile_complaints, | |
11738 | _("Invalid .debug_ranges data (no base address)")); | |
11739 | return 0; | |
11740 | } | |
11741 | ||
9277c30c UW |
11742 | if (range_beginning > range_end) |
11743 | { | |
11744 | /* Inverted range entries are invalid. */ | |
11745 | complaint (&symfile_complaints, | |
11746 | _("Invalid .debug_ranges data (inverted range)")); | |
11747 | return 0; | |
11748 | } | |
11749 | ||
11750 | /* Empty range entries have no effect. */ | |
11751 | if (range_beginning == range_end) | |
11752 | continue; | |
11753 | ||
43039443 JK |
11754 | range_beginning += base; |
11755 | range_end += base; | |
11756 | ||
01093045 DE |
11757 | /* A not-uncommon case of bad debug info. |
11758 | Don't pollute the addrmap with bad data. */ | |
11759 | if (range_beginning + baseaddr == 0 | |
11760 | && !dwarf2_per_objfile->has_section_at_zero) | |
11761 | { | |
11762 | complaint (&symfile_complaints, | |
11763 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 11764 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
11765 | continue; |
11766 | } | |
11767 | ||
9277c30c | 11768 | if (ranges_pst != NULL) |
ff013f42 | 11769 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
11770 | range_beginning + baseaddr, |
11771 | range_end - 1 + baseaddr, | |
ff013f42 JK |
11772 | ranges_pst); |
11773 | ||
43039443 JK |
11774 | /* FIXME: This is recording everything as a low-high |
11775 | segment of consecutive addresses. We should have a | |
11776 | data structure for discontiguous block ranges | |
11777 | instead. */ | |
11778 | if (! low_set) | |
11779 | { | |
11780 | low = range_beginning; | |
11781 | high = range_end; | |
11782 | low_set = 1; | |
11783 | } | |
11784 | else | |
11785 | { | |
11786 | if (range_beginning < low) | |
11787 | low = range_beginning; | |
11788 | if (range_end > high) | |
11789 | high = range_end; | |
11790 | } | |
11791 | } | |
11792 | ||
11793 | if (! low_set) | |
11794 | /* If the first entry is an end-of-list marker, the range | |
11795 | describes an empty scope, i.e. no instructions. */ | |
11796 | return 0; | |
11797 | ||
11798 | if (low_return) | |
11799 | *low_return = low; | |
11800 | if (high_return) | |
11801 | *high_return = high; | |
11802 | return 1; | |
11803 | } | |
11804 | ||
af34e669 DJ |
11805 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
11806 | are present and valid, otherwise, return 0. Return -1 if the range is | |
11807 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 11808 | |
c906108c | 11809 | static int |
af34e669 | 11810 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
11811 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
11812 | struct partial_symtab *pst) | |
c906108c SS |
11813 | { |
11814 | struct attribute *attr; | |
91da1414 | 11815 | struct attribute *attr_high; |
af34e669 DJ |
11816 | CORE_ADDR low = 0; |
11817 | CORE_ADDR high = 0; | |
11818 | int ret = 0; | |
c906108c | 11819 | |
91da1414 MW |
11820 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11821 | if (attr_high) | |
af34e669 | 11822 | { |
e142c38c | 11823 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 11824 | if (attr) |
91da1414 | 11825 | { |
31aa7e4e JB |
11826 | low = attr_value_as_address (attr); |
11827 | high = attr_value_as_address (attr_high); | |
11828 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
11829 | high += low; | |
91da1414 | 11830 | } |
af34e669 DJ |
11831 | else |
11832 | /* Found high w/o low attribute. */ | |
11833 | return 0; | |
11834 | ||
11835 | /* Found consecutive range of addresses. */ | |
11836 | ret = 1; | |
11837 | } | |
c906108c | 11838 | else |
af34e669 | 11839 | { |
e142c38c | 11840 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
11841 | if (attr != NULL) |
11842 | { | |
ab435259 DE |
11843 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
11844 | We take advantage of the fact that DW_AT_ranges does not appear | |
11845 | in DW_TAG_compile_unit of DWO files. */ | |
11846 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
11847 | unsigned int ranges_offset = (DW_UNSND (attr) | |
11848 | + (need_ranges_base | |
11849 | ? cu->ranges_base | |
11850 | : 0)); | |
2e3cf129 | 11851 | |
af34e669 | 11852 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 11853 | .debug_ranges section. */ |
2e3cf129 | 11854 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 11855 | return 0; |
43039443 | 11856 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
11857 | ret = -1; |
11858 | } | |
11859 | } | |
c906108c | 11860 | |
9373cf26 JK |
11861 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
11862 | if (high <= low) | |
c906108c SS |
11863 | return 0; |
11864 | ||
11865 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
11866 | eliminate duplicate copies of functions and vtables and such. | |
11867 | The linker will arbitrarily choose one and discard the others. | |
11868 | The AT_*_pc values for such functions refer to local labels in | |
11869 | these sections. If the section from that file was discarded, the | |
11870 | labels are not in the output, so the relocs get a value of 0. | |
11871 | If this is a discarded function, mark the pc bounds as invalid, | |
11872 | so that GDB will ignore it. */ | |
72dca2f5 | 11873 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
11874 | return 0; |
11875 | ||
11876 | *lowpc = low; | |
96408a79 SA |
11877 | if (highpc) |
11878 | *highpc = high; | |
af34e669 | 11879 | return ret; |
c906108c SS |
11880 | } |
11881 | ||
b084d499 JB |
11882 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
11883 | its low and high PC addresses. Do nothing if these addresses could not | |
11884 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
11885 | and HIGHPC to the high address if greater than HIGHPC. */ | |
11886 | ||
11887 | static void | |
11888 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
11889 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
11890 | struct dwarf2_cu *cu) | |
11891 | { | |
11892 | CORE_ADDR low, high; | |
11893 | struct die_info *child = die->child; | |
11894 | ||
d85a05f0 | 11895 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
11896 | { |
11897 | *lowpc = min (*lowpc, low); | |
11898 | *highpc = max (*highpc, high); | |
11899 | } | |
11900 | ||
11901 | /* If the language does not allow nested subprograms (either inside | |
11902 | subprograms or lexical blocks), we're done. */ | |
11903 | if (cu->language != language_ada) | |
11904 | return; | |
6e70227d | 11905 | |
b084d499 JB |
11906 | /* Check all the children of the given DIE. If it contains nested |
11907 | subprograms, then check their pc bounds. Likewise, we need to | |
11908 | check lexical blocks as well, as they may also contain subprogram | |
11909 | definitions. */ | |
11910 | while (child && child->tag) | |
11911 | { | |
11912 | if (child->tag == DW_TAG_subprogram | |
11913 | || child->tag == DW_TAG_lexical_block) | |
11914 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
11915 | child = sibling_die (child); | |
11916 | } | |
11917 | } | |
11918 | ||
fae299cd DC |
11919 | /* Get the low and high pc's represented by the scope DIE, and store |
11920 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
11921 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
11922 | ||
11923 | static void | |
11924 | get_scope_pc_bounds (struct die_info *die, | |
11925 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
11926 | struct dwarf2_cu *cu) | |
11927 | { | |
11928 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
11929 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
11930 | CORE_ADDR current_low, current_high; | |
11931 | ||
d85a05f0 | 11932 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
11933 | { |
11934 | best_low = current_low; | |
11935 | best_high = current_high; | |
11936 | } | |
11937 | else | |
11938 | { | |
11939 | struct die_info *child = die->child; | |
11940 | ||
11941 | while (child && child->tag) | |
11942 | { | |
11943 | switch (child->tag) { | |
11944 | case DW_TAG_subprogram: | |
b084d499 | 11945 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
11946 | break; |
11947 | case DW_TAG_namespace: | |
f55ee35c | 11948 | case DW_TAG_module: |
fae299cd DC |
11949 | /* FIXME: carlton/2004-01-16: Should we do this for |
11950 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
11951 | that current GCC's always emit the DIEs corresponding | |
11952 | to definitions of methods of classes as children of a | |
11953 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
11954 | the DIEs giving the declarations, which could be | |
11955 | anywhere). But I don't see any reason why the | |
11956 | standards says that they have to be there. */ | |
11957 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
11958 | ||
11959 | if (current_low != ((CORE_ADDR) -1)) | |
11960 | { | |
11961 | best_low = min (best_low, current_low); | |
11962 | best_high = max (best_high, current_high); | |
11963 | } | |
11964 | break; | |
11965 | default: | |
0963b4bd | 11966 | /* Ignore. */ |
fae299cd DC |
11967 | break; |
11968 | } | |
11969 | ||
11970 | child = sibling_die (child); | |
11971 | } | |
11972 | } | |
11973 | ||
11974 | *lowpc = best_low; | |
11975 | *highpc = best_high; | |
11976 | } | |
11977 | ||
801e3a5b JB |
11978 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
11979 | in DIE. */ | |
380bca97 | 11980 | |
801e3a5b JB |
11981 | static void |
11982 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
11983 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
11984 | { | |
bb5ed363 | 11985 | struct objfile *objfile = cu->objfile; |
801e3a5b | 11986 | struct attribute *attr; |
91da1414 | 11987 | struct attribute *attr_high; |
801e3a5b | 11988 | |
91da1414 MW |
11989 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11990 | if (attr_high) | |
801e3a5b | 11991 | { |
801e3a5b JB |
11992 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
11993 | if (attr) | |
11994 | { | |
31aa7e4e JB |
11995 | CORE_ADDR low = attr_value_as_address (attr); |
11996 | CORE_ADDR high = attr_value_as_address (attr_high); | |
11997 | ||
11998 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
11999 | high += low; | |
9a619af0 | 12000 | |
801e3a5b JB |
12001 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
12002 | } | |
12003 | } | |
12004 | ||
12005 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12006 | if (attr) | |
12007 | { | |
bb5ed363 | 12008 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12009 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12010 | We take advantage of the fact that DW_AT_ranges does not appear | |
12011 | in DW_TAG_compile_unit of DWO files. */ | |
12012 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12013 | |
12014 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12015 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12016 | unsigned long offset = (DW_UNSND (attr) |
12017 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12018 | const gdb_byte *buffer; |
801e3a5b JB |
12019 | |
12020 | /* For some target architectures, but not others, the | |
12021 | read_address function sign-extends the addresses it returns. | |
12022 | To recognize base address selection entries, we need a | |
12023 | mask. */ | |
12024 | unsigned int addr_size = cu->header.addr_size; | |
12025 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12026 | ||
12027 | /* The base address, to which the next pair is relative. Note | |
12028 | that this 'base' is a DWARF concept: most entries in a range | |
12029 | list are relative, to reduce the number of relocs against the | |
12030 | debugging information. This is separate from this function's | |
12031 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12032 | information from a shared library based on the address at | |
12033 | which the library was loaded. */ | |
d00adf39 DE |
12034 | CORE_ADDR base = cu->base_address; |
12035 | int base_known = cu->base_known; | |
801e3a5b | 12036 | |
d62bfeaf | 12037 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12038 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
12039 | { |
12040 | complaint (&symfile_complaints, | |
12041 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
12042 | offset); | |
12043 | return; | |
12044 | } | |
d62bfeaf | 12045 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
12046 | |
12047 | for (;;) | |
12048 | { | |
12049 | unsigned int bytes_read; | |
12050 | CORE_ADDR start, end; | |
12051 | ||
12052 | start = read_address (obfd, buffer, cu, &bytes_read); | |
12053 | buffer += bytes_read; | |
12054 | end = read_address (obfd, buffer, cu, &bytes_read); | |
12055 | buffer += bytes_read; | |
12056 | ||
12057 | /* Did we find the end of the range list? */ | |
12058 | if (start == 0 && end == 0) | |
12059 | break; | |
12060 | ||
12061 | /* Did we find a base address selection entry? */ | |
12062 | else if ((start & base_select_mask) == base_select_mask) | |
12063 | { | |
12064 | base = end; | |
12065 | base_known = 1; | |
12066 | } | |
12067 | ||
12068 | /* We found an ordinary address range. */ | |
12069 | else | |
12070 | { | |
12071 | if (!base_known) | |
12072 | { | |
12073 | complaint (&symfile_complaints, | |
3e43a32a MS |
12074 | _("Invalid .debug_ranges data " |
12075 | "(no base address)")); | |
801e3a5b JB |
12076 | return; |
12077 | } | |
12078 | ||
9277c30c UW |
12079 | if (start > end) |
12080 | { | |
12081 | /* Inverted range entries are invalid. */ | |
12082 | complaint (&symfile_complaints, | |
12083 | _("Invalid .debug_ranges data " | |
12084 | "(inverted range)")); | |
12085 | return; | |
12086 | } | |
12087 | ||
12088 | /* Empty range entries have no effect. */ | |
12089 | if (start == end) | |
12090 | continue; | |
12091 | ||
01093045 DE |
12092 | start += base + baseaddr; |
12093 | end += base + baseaddr; | |
12094 | ||
12095 | /* A not-uncommon case of bad debug info. | |
12096 | Don't pollute the addrmap with bad data. */ | |
12097 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
12098 | { | |
12099 | complaint (&symfile_complaints, | |
12100 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12101 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12102 | continue; |
12103 | } | |
12104 | ||
12105 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
12106 | } |
12107 | } | |
12108 | } | |
12109 | } | |
12110 | ||
685b1105 JK |
12111 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12112 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12113 | |
685b1105 JK |
12114 | static void |
12115 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
12116 | { |
12117 | const char *cs; | |
12118 | int major, minor, release; | |
12119 | ||
12120 | if (cu->producer == NULL) | |
12121 | { | |
12122 | /* For unknown compilers expect their behavior is DWARF version | |
12123 | compliant. | |
12124 | ||
12125 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12126 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12127 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12128 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12129 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12130 | } |
685b1105 | 12131 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 12132 | { |
685b1105 JK |
12133 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
12134 | ||
ba919b58 TT |
12135 | cs = &cu->producer[strlen ("GNU ")]; |
12136 | while (*cs && !isdigit (*cs)) | |
12137 | cs++; | |
12138 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
12139 | { | |
12140 | /* Not recognized as GCC. */ | |
12141 | } | |
12142 | else | |
1b80a9fa JK |
12143 | { |
12144 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
12145 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
12146 | } | |
685b1105 JK |
12147 | } |
12148 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
12149 | cu->producer_is_icc = 1; | |
12150 | else | |
12151 | { | |
12152 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12153 | compliant. */ | |
60d5a603 JK |
12154 | } |
12155 | ||
ba919b58 | 12156 | cu->checked_producer = 1; |
685b1105 | 12157 | } |
ba919b58 | 12158 | |
685b1105 JK |
12159 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12160 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12161 | during 4.6.0 experimental. */ | |
12162 | ||
12163 | static int | |
12164 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12165 | { | |
12166 | if (!cu->checked_producer) | |
12167 | check_producer (cu); | |
12168 | ||
12169 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12170 | } |
12171 | ||
12172 | /* Return the default accessibility type if it is not overriden by | |
12173 | DW_AT_accessibility. */ | |
12174 | ||
12175 | static enum dwarf_access_attribute | |
12176 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12177 | { | |
12178 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12179 | { | |
12180 | /* The default DWARF 2 accessibility for members is public, the default | |
12181 | accessibility for inheritance is private. */ | |
12182 | ||
12183 | if (die->tag != DW_TAG_inheritance) | |
12184 | return DW_ACCESS_public; | |
12185 | else | |
12186 | return DW_ACCESS_private; | |
12187 | } | |
12188 | else | |
12189 | { | |
12190 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12191 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12192 | depends on the container kind. */ | |
12193 | ||
12194 | if (die->parent->tag == DW_TAG_class_type) | |
12195 | return DW_ACCESS_private; | |
12196 | else | |
12197 | return DW_ACCESS_public; | |
12198 | } | |
12199 | } | |
12200 | ||
74ac6d43 TT |
12201 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12202 | offset. If the attribute was not found return 0, otherwise return | |
12203 | 1. If it was found but could not properly be handled, set *OFFSET | |
12204 | to 0. */ | |
12205 | ||
12206 | static int | |
12207 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12208 | LONGEST *offset) | |
12209 | { | |
12210 | struct attribute *attr; | |
12211 | ||
12212 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12213 | if (attr != NULL) | |
12214 | { | |
12215 | *offset = 0; | |
12216 | ||
12217 | /* Note that we do not check for a section offset first here. | |
12218 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12219 | so if we see it, we can assume that a constant form is really | |
12220 | a constant and not a section offset. */ | |
12221 | if (attr_form_is_constant (attr)) | |
12222 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12223 | else if (attr_form_is_section_offset (attr)) | |
12224 | dwarf2_complex_location_expr_complaint (); | |
12225 | else if (attr_form_is_block (attr)) | |
12226 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12227 | else | |
12228 | dwarf2_complex_location_expr_complaint (); | |
12229 | ||
12230 | return 1; | |
12231 | } | |
12232 | ||
12233 | return 0; | |
12234 | } | |
12235 | ||
c906108c SS |
12236 | /* Add an aggregate field to the field list. */ |
12237 | ||
12238 | static void | |
107d2387 | 12239 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12240 | struct dwarf2_cu *cu) |
6e70227d | 12241 | { |
e7c27a73 | 12242 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12243 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12244 | struct nextfield *new_field; |
12245 | struct attribute *attr; | |
12246 | struct field *fp; | |
15d034d0 | 12247 | const char *fieldname = ""; |
c906108c SS |
12248 | |
12249 | /* Allocate a new field list entry and link it in. */ | |
12250 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 12251 | make_cleanup (xfree, new_field); |
c906108c | 12252 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12253 | |
12254 | if (die->tag == DW_TAG_inheritance) | |
12255 | { | |
12256 | new_field->next = fip->baseclasses; | |
12257 | fip->baseclasses = new_field; | |
12258 | } | |
12259 | else | |
12260 | { | |
12261 | new_field->next = fip->fields; | |
12262 | fip->fields = new_field; | |
12263 | } | |
c906108c SS |
12264 | fip->nfields++; |
12265 | ||
e142c38c | 12266 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12267 | if (attr) |
12268 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12269 | else |
12270 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12271 | if (new_field->accessibility != DW_ACCESS_public) |
12272 | fip->non_public_fields = 1; | |
60d5a603 | 12273 | |
e142c38c | 12274 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12275 | if (attr) |
12276 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12277 | else |
12278 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12279 | |
12280 | fp = &new_field->field; | |
a9a9bd0f | 12281 | |
e142c38c | 12282 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12283 | { |
74ac6d43 TT |
12284 | LONGEST offset; |
12285 | ||
a9a9bd0f | 12286 | /* Data member other than a C++ static data member. */ |
6e70227d | 12287 | |
c906108c | 12288 | /* Get type of field. */ |
e7c27a73 | 12289 | fp->type = die_type (die, cu); |
c906108c | 12290 | |
d6a843b5 | 12291 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12292 | |
c906108c | 12293 | /* Get bit size of field (zero if none). */ |
e142c38c | 12294 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12295 | if (attr) |
12296 | { | |
12297 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12298 | } | |
12299 | else | |
12300 | { | |
12301 | FIELD_BITSIZE (*fp) = 0; | |
12302 | } | |
12303 | ||
12304 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12305 | if (handle_data_member_location (die, cu, &offset)) |
12306 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12307 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12308 | if (attr) |
12309 | { | |
5e2b427d | 12310 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12311 | { |
12312 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12313 | additional bit offset from the MSB of the containing |
12314 | anonymous object to the MSB of the field. We don't | |
12315 | have to do anything special since we don't need to | |
12316 | know the size of the anonymous object. */ | |
f41f5e61 | 12317 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12318 | } |
12319 | else | |
12320 | { | |
12321 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12322 | MSB of the anonymous object, subtract off the number of |
12323 | bits from the MSB of the field to the MSB of the | |
12324 | object, and then subtract off the number of bits of | |
12325 | the field itself. The result is the bit offset of | |
12326 | the LSB of the field. */ | |
c906108c SS |
12327 | int anonymous_size; |
12328 | int bit_offset = DW_UNSND (attr); | |
12329 | ||
e142c38c | 12330 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12331 | if (attr) |
12332 | { | |
12333 | /* The size of the anonymous object containing | |
12334 | the bit field is explicit, so use the | |
12335 | indicated size (in bytes). */ | |
12336 | anonymous_size = DW_UNSND (attr); | |
12337 | } | |
12338 | else | |
12339 | { | |
12340 | /* The size of the anonymous object containing | |
12341 | the bit field must be inferred from the type | |
12342 | attribute of the data member containing the | |
12343 | bit field. */ | |
12344 | anonymous_size = TYPE_LENGTH (fp->type); | |
12345 | } | |
f41f5e61 PA |
12346 | SET_FIELD_BITPOS (*fp, |
12347 | (FIELD_BITPOS (*fp) | |
12348 | + anonymous_size * bits_per_byte | |
12349 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
12350 | } |
12351 | } | |
12352 | ||
12353 | /* Get name of field. */ | |
39cbfefa DJ |
12354 | fieldname = dwarf2_name (die, cu); |
12355 | if (fieldname == NULL) | |
12356 | fieldname = ""; | |
d8151005 DJ |
12357 | |
12358 | /* The name is already allocated along with this objfile, so we don't | |
12359 | need to duplicate it for the type. */ | |
12360 | fp->name = fieldname; | |
c906108c SS |
12361 | |
12362 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 12363 | pointer or virtual base class pointer) to private. */ |
e142c38c | 12364 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 12365 | { |
d48cc9dd | 12366 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
12367 | new_field->accessibility = DW_ACCESS_private; |
12368 | fip->non_public_fields = 1; | |
12369 | } | |
12370 | } | |
a9a9bd0f | 12371 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 12372 | { |
a9a9bd0f DC |
12373 | /* C++ static member. */ |
12374 | ||
12375 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
12376 | is a declaration, but all versions of G++ as of this writing | |
12377 | (so through at least 3.2.1) incorrectly generate | |
12378 | DW_TAG_variable tags. */ | |
6e70227d | 12379 | |
ff355380 | 12380 | const char *physname; |
c906108c | 12381 | |
a9a9bd0f | 12382 | /* Get name of field. */ |
39cbfefa DJ |
12383 | fieldname = dwarf2_name (die, cu); |
12384 | if (fieldname == NULL) | |
c906108c SS |
12385 | return; |
12386 | ||
254e6b9e | 12387 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
12388 | if (attr |
12389 | /* Only create a symbol if this is an external value. | |
12390 | new_symbol checks this and puts the value in the global symbol | |
12391 | table, which we want. If it is not external, new_symbol | |
12392 | will try to put the value in cu->list_in_scope which is wrong. */ | |
12393 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
12394 | { |
12395 | /* A static const member, not much different than an enum as far as | |
12396 | we're concerned, except that we can support more types. */ | |
12397 | new_symbol (die, NULL, cu); | |
12398 | } | |
12399 | ||
2df3850c | 12400 | /* Get physical name. */ |
ff355380 | 12401 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 12402 | |
d8151005 DJ |
12403 | /* The name is already allocated along with this objfile, so we don't |
12404 | need to duplicate it for the type. */ | |
12405 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 12406 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 12407 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
12408 | } |
12409 | else if (die->tag == DW_TAG_inheritance) | |
12410 | { | |
74ac6d43 | 12411 | LONGEST offset; |
d4b96c9a | 12412 | |
74ac6d43 TT |
12413 | /* C++ base class field. */ |
12414 | if (handle_data_member_location (die, cu, &offset)) | |
12415 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 12416 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 12417 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
12418 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
12419 | fip->nbaseclasses++; | |
12420 | } | |
12421 | } | |
12422 | ||
98751a41 JK |
12423 | /* Add a typedef defined in the scope of the FIP's class. */ |
12424 | ||
12425 | static void | |
12426 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
12427 | struct dwarf2_cu *cu) | |
6e70227d | 12428 | { |
98751a41 | 12429 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
12430 | struct typedef_field_list *new_field; |
12431 | struct attribute *attr; | |
12432 | struct typedef_field *fp; | |
12433 | char *fieldname = ""; | |
12434 | ||
12435 | /* Allocate a new field list entry and link it in. */ | |
12436 | new_field = xzalloc (sizeof (*new_field)); | |
12437 | make_cleanup (xfree, new_field); | |
12438 | ||
12439 | gdb_assert (die->tag == DW_TAG_typedef); | |
12440 | ||
12441 | fp = &new_field->field; | |
12442 | ||
12443 | /* Get name of field. */ | |
12444 | fp->name = dwarf2_name (die, cu); | |
12445 | if (fp->name == NULL) | |
12446 | return; | |
12447 | ||
12448 | fp->type = read_type_die (die, cu); | |
12449 | ||
12450 | new_field->next = fip->typedef_field_list; | |
12451 | fip->typedef_field_list = new_field; | |
12452 | fip->typedef_field_list_count++; | |
12453 | } | |
12454 | ||
c906108c SS |
12455 | /* Create the vector of fields, and attach it to the type. */ |
12456 | ||
12457 | static void | |
fba45db2 | 12458 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12459 | struct dwarf2_cu *cu) |
c906108c SS |
12460 | { |
12461 | int nfields = fip->nfields; | |
12462 | ||
12463 | /* Record the field count, allocate space for the array of fields, | |
12464 | and create blank accessibility bitfields if necessary. */ | |
12465 | TYPE_NFIELDS (type) = nfields; | |
12466 | TYPE_FIELDS (type) = (struct field *) | |
12467 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
12468 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
12469 | ||
b4ba55a1 | 12470 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
12471 | { |
12472 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12473 | ||
12474 | TYPE_FIELD_PRIVATE_BITS (type) = | |
12475 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12476 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
12477 | ||
12478 | TYPE_FIELD_PROTECTED_BITS (type) = | |
12479 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12480 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
12481 | ||
774b6a14 TT |
12482 | TYPE_FIELD_IGNORE_BITS (type) = |
12483 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12484 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
12485 | } |
12486 | ||
12487 | /* If the type has baseclasses, allocate and clear a bit vector for | |
12488 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 12489 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
12490 | { |
12491 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 12492 | unsigned char *pointer; |
c906108c SS |
12493 | |
12494 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
12495 | pointer = TYPE_ALLOC (type, num_bytes); |
12496 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
12497 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
12498 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
12499 | } | |
12500 | ||
3e43a32a MS |
12501 | /* Copy the saved-up fields into the field vector. Start from the head of |
12502 | the list, adding to the tail of the field array, so that they end up in | |
12503 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
12504 | while (nfields-- > 0) |
12505 | { | |
7d0ccb61 DJ |
12506 | struct nextfield *fieldp; |
12507 | ||
12508 | if (fip->fields) | |
12509 | { | |
12510 | fieldp = fip->fields; | |
12511 | fip->fields = fieldp->next; | |
12512 | } | |
12513 | else | |
12514 | { | |
12515 | fieldp = fip->baseclasses; | |
12516 | fip->baseclasses = fieldp->next; | |
12517 | } | |
12518 | ||
12519 | TYPE_FIELD (type, nfields) = fieldp->field; | |
12520 | switch (fieldp->accessibility) | |
c906108c | 12521 | { |
c5aa993b | 12522 | case DW_ACCESS_private: |
b4ba55a1 JB |
12523 | if (cu->language != language_ada) |
12524 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 12525 | break; |
c906108c | 12526 | |
c5aa993b | 12527 | case DW_ACCESS_protected: |
b4ba55a1 JB |
12528 | if (cu->language != language_ada) |
12529 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 12530 | break; |
c906108c | 12531 | |
c5aa993b JM |
12532 | case DW_ACCESS_public: |
12533 | break; | |
c906108c | 12534 | |
c5aa993b JM |
12535 | default: |
12536 | /* Unknown accessibility. Complain and treat it as public. */ | |
12537 | { | |
e2e0b3e5 | 12538 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 12539 | fieldp->accessibility); |
c5aa993b JM |
12540 | } |
12541 | break; | |
c906108c SS |
12542 | } |
12543 | if (nfields < fip->nbaseclasses) | |
12544 | { | |
7d0ccb61 | 12545 | switch (fieldp->virtuality) |
c906108c | 12546 | { |
c5aa993b JM |
12547 | case DW_VIRTUALITY_virtual: |
12548 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 12549 | if (cu->language == language_ada) |
a73c6dcd | 12550 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
12551 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
12552 | break; | |
c906108c SS |
12553 | } |
12554 | } | |
c906108c SS |
12555 | } |
12556 | } | |
12557 | ||
7d27a96d TT |
12558 | /* Return true if this member function is a constructor, false |
12559 | otherwise. */ | |
12560 | ||
12561 | static int | |
12562 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
12563 | { | |
12564 | const char *fieldname; | |
12565 | const char *typename; | |
12566 | int len; | |
12567 | ||
12568 | if (die->parent == NULL) | |
12569 | return 0; | |
12570 | ||
12571 | if (die->parent->tag != DW_TAG_structure_type | |
12572 | && die->parent->tag != DW_TAG_union_type | |
12573 | && die->parent->tag != DW_TAG_class_type) | |
12574 | return 0; | |
12575 | ||
12576 | fieldname = dwarf2_name (die, cu); | |
12577 | typename = dwarf2_name (die->parent, cu); | |
12578 | if (fieldname == NULL || typename == NULL) | |
12579 | return 0; | |
12580 | ||
12581 | len = strlen (fieldname); | |
12582 | return (strncmp (fieldname, typename, len) == 0 | |
12583 | && (typename[len] == '\0' || typename[len] == '<')); | |
12584 | } | |
12585 | ||
c906108c SS |
12586 | /* Add a member function to the proper fieldlist. */ |
12587 | ||
12588 | static void | |
107d2387 | 12589 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12590 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 12591 | { |
e7c27a73 | 12592 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12593 | struct attribute *attr; |
12594 | struct fnfieldlist *flp; | |
12595 | int i; | |
12596 | struct fn_field *fnp; | |
15d034d0 | 12597 | const char *fieldname; |
c906108c | 12598 | struct nextfnfield *new_fnfield; |
f792889a | 12599 | struct type *this_type; |
60d5a603 | 12600 | enum dwarf_access_attribute accessibility; |
c906108c | 12601 | |
b4ba55a1 | 12602 | if (cu->language == language_ada) |
a73c6dcd | 12603 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 12604 | |
2df3850c | 12605 | /* Get name of member function. */ |
39cbfefa DJ |
12606 | fieldname = dwarf2_name (die, cu); |
12607 | if (fieldname == NULL) | |
2df3850c | 12608 | return; |
c906108c | 12609 | |
c906108c SS |
12610 | /* Look up member function name in fieldlist. */ |
12611 | for (i = 0; i < fip->nfnfields; i++) | |
12612 | { | |
27bfe10e | 12613 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
12614 | break; |
12615 | } | |
12616 | ||
12617 | /* Create new list element if necessary. */ | |
12618 | if (i < fip->nfnfields) | |
12619 | flp = &fip->fnfieldlists[i]; | |
12620 | else | |
12621 | { | |
12622 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12623 | { | |
12624 | fip->fnfieldlists = (struct fnfieldlist *) | |
12625 | xrealloc (fip->fnfieldlists, | |
12626 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12627 | * sizeof (struct fnfieldlist)); |
c906108c | 12628 | if (fip->nfnfields == 0) |
c13c43fd | 12629 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
12630 | } |
12631 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
12632 | flp->name = fieldname; | |
12633 | flp->length = 0; | |
12634 | flp->head = NULL; | |
3da10d80 | 12635 | i = fip->nfnfields++; |
c906108c SS |
12636 | } |
12637 | ||
12638 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 12639 | entry. */ |
c906108c | 12640 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 12641 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
12642 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
12643 | new_fnfield->next = flp->head; | |
12644 | flp->head = new_fnfield; | |
12645 | flp->length++; | |
12646 | ||
12647 | /* Fill in the member function field info. */ | |
12648 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
12649 | |
12650 | /* Delay processing of the physname until later. */ | |
12651 | if (cu->language == language_cplus || cu->language == language_java) | |
12652 | { | |
12653 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
12654 | die, cu); | |
12655 | } | |
12656 | else | |
12657 | { | |
1d06ead6 | 12658 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
12659 | fnp->physname = physname ? physname : ""; |
12660 | } | |
12661 | ||
c906108c | 12662 | fnp->type = alloc_type (objfile); |
f792889a DJ |
12663 | this_type = read_type_die (die, cu); |
12664 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 12665 | { |
f792889a | 12666 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 12667 | |
f792889a | 12668 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
12669 | of the method itself (TYPE_CODE_METHOD). */ |
12670 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
12671 | TYPE_TARGET_TYPE (this_type), |
12672 | TYPE_FIELDS (this_type), | |
12673 | TYPE_NFIELDS (this_type), | |
12674 | TYPE_VARARGS (this_type)); | |
c906108c SS |
12675 | |
12676 | /* Handle static member functions. | |
c5aa993b | 12677 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
12678 | member functions. G++ helps GDB by marking the first |
12679 | parameter for non-static member functions (which is the this | |
12680 | pointer) as artificial. We obtain this information from | |
12681 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 12682 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
12683 | fnp->voffset = VOFFSET_STATIC; |
12684 | } | |
12685 | else | |
e2e0b3e5 | 12686 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 12687 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
12688 | |
12689 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 12690 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 12691 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 12692 | |
3e43a32a MS |
12693 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
12694 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
12695 | |
12696 | /* Get accessibility. */ | |
e142c38c | 12697 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 12698 | if (attr) |
60d5a603 JK |
12699 | accessibility = DW_UNSND (attr); |
12700 | else | |
12701 | accessibility = dwarf2_default_access_attribute (die, cu); | |
12702 | switch (accessibility) | |
c906108c | 12703 | { |
60d5a603 JK |
12704 | case DW_ACCESS_private: |
12705 | fnp->is_private = 1; | |
12706 | break; | |
12707 | case DW_ACCESS_protected: | |
12708 | fnp->is_protected = 1; | |
12709 | break; | |
c906108c SS |
12710 | } |
12711 | ||
b02dede2 | 12712 | /* Check for artificial methods. */ |
e142c38c | 12713 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
12714 | if (attr && DW_UNSND (attr) != 0) |
12715 | fnp->is_artificial = 1; | |
12716 | ||
7d27a96d TT |
12717 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
12718 | ||
0d564a31 | 12719 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
12720 | function. For older versions of GCC, this is an offset in the |
12721 | appropriate virtual table, as specified by DW_AT_containing_type. | |
12722 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
12723 | to the object address. */ |
12724 | ||
e142c38c | 12725 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 12726 | if (attr) |
8e19ed76 | 12727 | { |
aec5aa8b | 12728 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 12729 | { |
aec5aa8b TT |
12730 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
12731 | { | |
12732 | /* Old-style GCC. */ | |
12733 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
12734 | } | |
12735 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12736 | || (DW_BLOCK (attr)->size > 1 | |
12737 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
12738 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
12739 | { | |
12740 | struct dwarf_block blk; | |
12741 | int offset; | |
12742 | ||
12743 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12744 | ? 1 : 2); | |
12745 | blk.size = DW_BLOCK (attr)->size - offset; | |
12746 | blk.data = DW_BLOCK (attr)->data + offset; | |
12747 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
12748 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
12749 | dwarf2_complex_location_expr_complaint (); | |
12750 | else | |
12751 | fnp->voffset /= cu->header.addr_size; | |
12752 | fnp->voffset += 2; | |
12753 | } | |
12754 | else | |
12755 | dwarf2_complex_location_expr_complaint (); | |
12756 | ||
12757 | if (!fnp->fcontext) | |
12758 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
12759 | } | |
3690dd37 | 12760 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 12761 | { |
4d3c2250 | 12762 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
12763 | } |
12764 | else | |
12765 | { | |
4d3c2250 KB |
12766 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
12767 | fieldname); | |
8e19ed76 | 12768 | } |
0d564a31 | 12769 | } |
d48cc9dd DJ |
12770 | else |
12771 | { | |
12772 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
12773 | if (attr && DW_UNSND (attr)) | |
12774 | { | |
12775 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
12776 | complaint (&symfile_complaints, | |
3e43a32a MS |
12777 | _("Member function \"%s\" (offset %d) is virtual " |
12778 | "but the vtable offset is not specified"), | |
b64f50a1 | 12779 | fieldname, die->offset.sect_off); |
9655fd1a | 12780 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
12781 | TYPE_CPLUS_DYNAMIC (type) = 1; |
12782 | } | |
12783 | } | |
c906108c SS |
12784 | } |
12785 | ||
12786 | /* Create the vector of member function fields, and attach it to the type. */ | |
12787 | ||
12788 | static void | |
fba45db2 | 12789 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12790 | struct dwarf2_cu *cu) |
c906108c SS |
12791 | { |
12792 | struct fnfieldlist *flp; | |
c906108c SS |
12793 | int i; |
12794 | ||
b4ba55a1 | 12795 | if (cu->language == language_ada) |
a73c6dcd | 12796 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 12797 | |
c906108c SS |
12798 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
12799 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
12800 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
12801 | ||
12802 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
12803 | { | |
12804 | struct nextfnfield *nfp = flp->head; | |
12805 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
12806 | int k; | |
12807 | ||
12808 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
12809 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
12810 | fn_flp->fn_fields = (struct fn_field *) | |
12811 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
12812 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 12813 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
12814 | } |
12815 | ||
12816 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
12817 | } |
12818 | ||
1168df01 JB |
12819 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
12820 | language, zero otherwise. */ | |
12821 | static int | |
12822 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
12823 | { | |
12824 | static const char vptr[] = "_vptr"; | |
987504bb | 12825 | static const char vtable[] = "vtable"; |
1168df01 | 12826 | |
987504bb JJ |
12827 | /* Look for the C++ and Java forms of the vtable. */ |
12828 | if ((cu->language == language_java | |
12829 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
12830 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
12831 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
12832 | return 1; |
12833 | ||
12834 | return 0; | |
12835 | } | |
12836 | ||
c0dd20ea | 12837 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
12838 | functions, with the ABI-specified layout. If TYPE describes |
12839 | such a structure, smash it into a member function type. | |
61049d3b DJ |
12840 | |
12841 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
12842 | This is GCC PR debug/28767. */ | |
c0dd20ea | 12843 | |
0b92b5bb TT |
12844 | static void |
12845 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 12846 | { |
0b92b5bb | 12847 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
12848 | |
12849 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
12850 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
12851 | return; | |
c0dd20ea DJ |
12852 | |
12853 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
12854 | if (TYPE_FIELD_NAME (type, 0) == NULL |
12855 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
12856 | || TYPE_FIELD_NAME (type, 1) == NULL | |
12857 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
12858 | return; | |
c0dd20ea DJ |
12859 | |
12860 | /* Find the type of the method. */ | |
0b92b5bb | 12861 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
12862 | if (pfn_type == NULL |
12863 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
12864 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 12865 | return; |
c0dd20ea DJ |
12866 | |
12867 | /* Look for the "this" argument. */ | |
12868 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
12869 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 12870 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 12871 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 12872 | return; |
c0dd20ea DJ |
12873 | |
12874 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
12875 | new_type = alloc_type (objfile); |
12876 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
12877 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
12878 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 12879 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 12880 | } |
1168df01 | 12881 | |
685b1105 JK |
12882 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
12883 | (icc). */ | |
12884 | ||
12885 | static int | |
12886 | producer_is_icc (struct dwarf2_cu *cu) | |
12887 | { | |
12888 | if (!cu->checked_producer) | |
12889 | check_producer (cu); | |
12890 | ||
12891 | return cu->producer_is_icc; | |
12892 | } | |
12893 | ||
c906108c | 12894 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
12895 | (definition) to create a type for the structure or union. Fill in |
12896 | the type's name and general properties; the members will not be | |
83655187 DE |
12897 | processed until process_structure_scope. A symbol table entry for |
12898 | the type will also not be done until process_structure_scope (assuming | |
12899 | the type has a name). | |
c906108c | 12900 | |
c767944b DJ |
12901 | NOTE: we need to call these functions regardless of whether or not the |
12902 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 12903 | structure or union. This gets the type entered into our set of |
83655187 | 12904 | user defined types. */ |
c906108c | 12905 | |
f792889a | 12906 | static struct type * |
134d01f1 | 12907 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12908 | { |
e7c27a73 | 12909 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12910 | struct type *type; |
12911 | struct attribute *attr; | |
15d034d0 | 12912 | const char *name; |
c906108c | 12913 | |
348e048f DE |
12914 | /* If the definition of this type lives in .debug_types, read that type. |
12915 | Don't follow DW_AT_specification though, that will take us back up | |
12916 | the chain and we want to go down. */ | |
45e58e77 | 12917 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
12918 | if (attr) |
12919 | { | |
ac9ec31b | 12920 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 12921 | |
ac9ec31b | 12922 | /* The type's CU may not be the same as CU. |
02142a6c | 12923 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
12924 | return set_die_type (die, type, cu); |
12925 | } | |
12926 | ||
c0dd20ea | 12927 | type = alloc_type (objfile); |
c906108c | 12928 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 12929 | |
39cbfefa DJ |
12930 | name = dwarf2_name (die, cu); |
12931 | if (name != NULL) | |
c906108c | 12932 | { |
987504bb JJ |
12933 | if (cu->language == language_cplus |
12934 | || cu->language == language_java) | |
63d06c5c | 12935 | { |
15d034d0 | 12936 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
12937 | |
12938 | /* dwarf2_full_name might have already finished building the DIE's | |
12939 | type. If so, there is no need to continue. */ | |
12940 | if (get_die_type (die, cu) != NULL) | |
12941 | return get_die_type (die, cu); | |
12942 | ||
12943 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
12944 | if (die->tag == DW_TAG_structure_type |
12945 | || die->tag == DW_TAG_class_type) | |
12946 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
12947 | } |
12948 | else | |
12949 | { | |
d8151005 DJ |
12950 | /* The name is already allocated along with this objfile, so |
12951 | we don't need to duplicate it for the type. */ | |
7d455152 | 12952 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
12953 | if (die->tag == DW_TAG_class_type) |
12954 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 12955 | } |
c906108c SS |
12956 | } |
12957 | ||
12958 | if (die->tag == DW_TAG_structure_type) | |
12959 | { | |
12960 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
12961 | } | |
12962 | else if (die->tag == DW_TAG_union_type) | |
12963 | { | |
12964 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
12965 | } | |
12966 | else | |
12967 | { | |
c906108c SS |
12968 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
12969 | } | |
12970 | ||
0cc2414c TT |
12971 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
12972 | TYPE_DECLARED_CLASS (type) = 1; | |
12973 | ||
e142c38c | 12974 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12975 | if (attr) |
12976 | { | |
12977 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12978 | } | |
12979 | else | |
12980 | { | |
12981 | TYPE_LENGTH (type) = 0; | |
12982 | } | |
12983 | ||
422b1cb0 | 12984 | if (producer_is_icc (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 JK |
12985 | { |
12986 | /* ICC does not output the required DW_AT_declaration | |
12987 | on incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 12988 | TYPE_STUB (type) = 1; |
685b1105 JK |
12989 | } |
12990 | else | |
12991 | TYPE_STUB_SUPPORTED (type) = 1; | |
12992 | ||
dc718098 | 12993 | if (die_is_declaration (die, cu)) |
876cecd0 | 12994 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
12995 | else if (attr == NULL && die->child == NULL |
12996 | && producer_is_realview (cu->producer)) | |
12997 | /* RealView does not output the required DW_AT_declaration | |
12998 | on incomplete types. */ | |
12999 | TYPE_STUB (type) = 1; | |
dc718098 | 13000 | |
c906108c SS |
13001 | /* We need to add the type field to the die immediately so we don't |
13002 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13003 | type within the structure itself. */ |
1c379e20 | 13004 | set_die_type (die, type, cu); |
c906108c | 13005 | |
7e314c57 JK |
13006 | /* set_die_type should be already done. */ |
13007 | set_descriptive_type (type, die, cu); | |
13008 | ||
c767944b DJ |
13009 | return type; |
13010 | } | |
13011 | ||
13012 | /* Finish creating a structure or union type, including filling in | |
13013 | its members and creating a symbol for it. */ | |
13014 | ||
13015 | static void | |
13016 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13017 | { | |
13018 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13019 | struct die_info *child_die; |
c767944b DJ |
13020 | struct type *type; |
13021 | ||
13022 | type = get_die_type (die, cu); | |
13023 | if (type == NULL) | |
13024 | type = read_structure_type (die, cu); | |
13025 | ||
e142c38c | 13026 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13027 | { |
13028 | struct field_info fi; | |
34eaf542 | 13029 | VEC (symbolp) *template_args = NULL; |
c767944b | 13030 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13031 | |
13032 | memset (&fi, 0, sizeof (struct field_info)); | |
13033 | ||
639d11d3 | 13034 | child_die = die->child; |
c906108c SS |
13035 | |
13036 | while (child_die && child_die->tag) | |
13037 | { | |
a9a9bd0f DC |
13038 | if (child_die->tag == DW_TAG_member |
13039 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13040 | { |
a9a9bd0f DC |
13041 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13042 | should be a DW_TAG_member that is a declaration, but | |
13043 | all versions of G++ as of this writing (so through at | |
13044 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13045 | tags for them instead. */ | |
e7c27a73 | 13046 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13047 | } |
8713b1b1 | 13048 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13049 | { |
0963b4bd | 13050 | /* C++ member function. */ |
e7c27a73 | 13051 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
13052 | } |
13053 | else if (child_die->tag == DW_TAG_inheritance) | |
13054 | { | |
13055 | /* C++ base class field. */ | |
e7c27a73 | 13056 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13057 | } |
98751a41 JK |
13058 | else if (child_die->tag == DW_TAG_typedef) |
13059 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13060 | else if (child_die->tag == DW_TAG_template_type_param |
13061 | || child_die->tag == DW_TAG_template_value_param) | |
13062 | { | |
13063 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13064 | ||
f1078f66 DJ |
13065 | if (arg != NULL) |
13066 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13067 | } |
13068 | ||
c906108c SS |
13069 | child_die = sibling_die (child_die); |
13070 | } | |
13071 | ||
34eaf542 TT |
13072 | /* Attach template arguments to type. */ |
13073 | if (! VEC_empty (symbolp, template_args)) | |
13074 | { | |
13075 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13076 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13077 | = VEC_length (symbolp, template_args); | |
13078 | TYPE_TEMPLATE_ARGUMENTS (type) | |
13079 | = obstack_alloc (&objfile->objfile_obstack, | |
13080 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13081 | * sizeof (struct symbol *))); | |
13082 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
13083 | VEC_address (symbolp, template_args), | |
13084 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13085 | * sizeof (struct symbol *))); | |
13086 | VEC_free (symbolp, template_args); | |
13087 | } | |
13088 | ||
c906108c SS |
13089 | /* Attach fields and member functions to the type. */ |
13090 | if (fi.nfields) | |
e7c27a73 | 13091 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13092 | if (fi.nfnfields) |
13093 | { | |
e7c27a73 | 13094 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13095 | |
c5aa993b | 13096 | /* Get the type which refers to the base class (possibly this |
c906108c | 13097 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13098 | class from the DW_AT_containing_type attribute. This use of |
13099 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13100 | |
e142c38c | 13101 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13102 | { |
e7c27a73 | 13103 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
13104 | |
13105 | TYPE_VPTR_BASETYPE (type) = t; | |
13106 | if (type == t) | |
13107 | { | |
c906108c SS |
13108 | int i; |
13109 | ||
13110 | /* Our own class provides vtbl ptr. */ | |
13111 | for (i = TYPE_NFIELDS (t) - 1; | |
13112 | i >= TYPE_N_BASECLASSES (t); | |
13113 | --i) | |
13114 | { | |
0d5cff50 | 13115 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13116 | |
1168df01 | 13117 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
13118 | { |
13119 | TYPE_VPTR_FIELDNO (type) = i; | |
13120 | break; | |
13121 | } | |
13122 | } | |
13123 | ||
13124 | /* Complain if virtual function table field not found. */ | |
13125 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13126 | complaint (&symfile_complaints, |
3e43a32a MS |
13127 | _("virtual function table pointer " |
13128 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13129 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13130 | ""); | |
c906108c SS |
13131 | } |
13132 | else | |
13133 | { | |
13134 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
13135 | } | |
13136 | } | |
f6235d4c EZ |
13137 | else if (cu->producer |
13138 | && strncmp (cu->producer, | |
13139 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
13140 | { | |
13141 | /* The IBM XLC compiler does not provide direct indication | |
13142 | of the containing type, but the vtable pointer is | |
13143 | always named __vfp. */ | |
13144 | ||
13145 | int i; | |
13146 | ||
13147 | for (i = TYPE_NFIELDS (type) - 1; | |
13148 | i >= TYPE_N_BASECLASSES (type); | |
13149 | --i) | |
13150 | { | |
13151 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13152 | { | |
13153 | TYPE_VPTR_FIELDNO (type) = i; | |
13154 | TYPE_VPTR_BASETYPE (type) = type; | |
13155 | break; | |
13156 | } | |
13157 | } | |
13158 | } | |
c906108c | 13159 | } |
98751a41 JK |
13160 | |
13161 | /* Copy fi.typedef_field_list linked list elements content into the | |
13162 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13163 | if (fi.typedef_field_list) | |
13164 | { | |
13165 | int i = fi.typedef_field_list_count; | |
13166 | ||
a0d7a4ff | 13167 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
13168 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
13169 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
13170 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
13171 | ||
13172 | /* Reverse the list order to keep the debug info elements order. */ | |
13173 | while (--i >= 0) | |
13174 | { | |
13175 | struct typedef_field *dest, *src; | |
6e70227d | 13176 | |
98751a41 JK |
13177 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13178 | src = &fi.typedef_field_list->field; | |
13179 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13180 | *dest = *src; | |
13181 | } | |
13182 | } | |
c767944b DJ |
13183 | |
13184 | do_cleanups (back_to); | |
eb2a6f42 TT |
13185 | |
13186 | if (HAVE_CPLUS_STRUCT (type)) | |
13187 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 13188 | } |
63d06c5c | 13189 | |
bb5ed363 | 13190 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13191 | |
90aeadfc DC |
13192 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13193 | snapshots) has been known to create a die giving a declaration | |
13194 | for a class that has, as a child, a die giving a definition for a | |
13195 | nested class. So we have to process our children even if the | |
13196 | current die is a declaration. Normally, of course, a declaration | |
13197 | won't have any children at all. */ | |
134d01f1 | 13198 | |
ca040673 DE |
13199 | child_die = die->child; |
13200 | ||
90aeadfc DC |
13201 | while (child_die != NULL && child_die->tag) |
13202 | { | |
13203 | if (child_die->tag == DW_TAG_member | |
13204 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13205 | || child_die->tag == DW_TAG_inheritance |
13206 | || child_die->tag == DW_TAG_template_value_param | |
13207 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13208 | { |
90aeadfc | 13209 | /* Do nothing. */ |
134d01f1 | 13210 | } |
90aeadfc DC |
13211 | else |
13212 | process_die (child_die, cu); | |
134d01f1 | 13213 | |
90aeadfc | 13214 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13215 | } |
13216 | ||
fa4028e9 JB |
13217 | /* Do not consider external references. According to the DWARF standard, |
13218 | these DIEs are identified by the fact that they have no byte_size | |
13219 | attribute, and a declaration attribute. */ | |
13220 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13221 | || !die_is_declaration (die, cu)) | |
c767944b | 13222 | new_symbol (die, type, cu); |
134d01f1 DJ |
13223 | } |
13224 | ||
55426c9d JB |
13225 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13226 | update TYPE using some information only available in DIE's children. */ | |
13227 | ||
13228 | static void | |
13229 | update_enumeration_type_from_children (struct die_info *die, | |
13230 | struct type *type, | |
13231 | struct dwarf2_cu *cu) | |
13232 | { | |
13233 | struct obstack obstack; | |
13234 | struct die_info *child_die = die->child; | |
13235 | int unsigned_enum = 1; | |
13236 | int flag_enum = 1; | |
13237 | ULONGEST mask = 0; | |
13238 | struct cleanup *old_chain; | |
13239 | ||
13240 | obstack_init (&obstack); | |
13241 | old_chain = make_cleanup_obstack_free (&obstack); | |
13242 | ||
13243 | while (child_die != NULL && child_die->tag) | |
13244 | { | |
13245 | struct attribute *attr; | |
13246 | LONGEST value; | |
13247 | const gdb_byte *bytes; | |
13248 | struct dwarf2_locexpr_baton *baton; | |
13249 | const char *name; | |
13250 | if (child_die->tag != DW_TAG_enumerator) | |
13251 | continue; | |
13252 | ||
13253 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13254 | if (attr == NULL) | |
13255 | continue; | |
13256 | ||
13257 | name = dwarf2_name (child_die, cu); | |
13258 | if (name == NULL) | |
13259 | name = "<anonymous enumerator>"; | |
13260 | ||
13261 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13262 | &value, &bytes, &baton); | |
13263 | if (value < 0) | |
13264 | { | |
13265 | unsigned_enum = 0; | |
13266 | flag_enum = 0; | |
13267 | } | |
13268 | else if ((mask & value) != 0) | |
13269 | flag_enum = 0; | |
13270 | else | |
13271 | mask |= value; | |
13272 | ||
13273 | /* If we already know that the enum type is neither unsigned, nor | |
13274 | a flag type, no need to look at the rest of the enumerates. */ | |
13275 | if (!unsigned_enum && !flag_enum) | |
13276 | break; | |
13277 | child_die = sibling_die (child_die); | |
13278 | } | |
13279 | ||
13280 | if (unsigned_enum) | |
13281 | TYPE_UNSIGNED (type) = 1; | |
13282 | if (flag_enum) | |
13283 | TYPE_FLAG_ENUM (type) = 1; | |
13284 | ||
13285 | do_cleanups (old_chain); | |
13286 | } | |
13287 | ||
134d01f1 DJ |
13288 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
13289 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 13290 | |
f792889a | 13291 | static struct type * |
134d01f1 | 13292 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13293 | { |
e7c27a73 | 13294 | struct objfile *objfile = cu->objfile; |
c906108c | 13295 | struct type *type; |
c906108c | 13296 | struct attribute *attr; |
0114d602 | 13297 | const char *name; |
134d01f1 | 13298 | |
348e048f DE |
13299 | /* If the definition of this type lives in .debug_types, read that type. |
13300 | Don't follow DW_AT_specification though, that will take us back up | |
13301 | the chain and we want to go down. */ | |
45e58e77 | 13302 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13303 | if (attr) |
13304 | { | |
ac9ec31b | 13305 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13306 | |
ac9ec31b | 13307 | /* The type's CU may not be the same as CU. |
02142a6c | 13308 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13309 | return set_die_type (die, type, cu); |
13310 | } | |
13311 | ||
c906108c SS |
13312 | type = alloc_type (objfile); |
13313 | ||
13314 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 13315 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 13316 | if (name != NULL) |
7d455152 | 13317 | TYPE_TAG_NAME (type) = name; |
c906108c | 13318 | |
0626fc76 TT |
13319 | attr = dwarf2_attr (die, DW_AT_type, cu); |
13320 | if (attr != NULL) | |
13321 | { | |
13322 | struct type *underlying_type = die_type (die, cu); | |
13323 | ||
13324 | TYPE_TARGET_TYPE (type) = underlying_type; | |
13325 | } | |
13326 | ||
e142c38c | 13327 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13328 | if (attr) |
13329 | { | |
13330 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13331 | } | |
13332 | else | |
13333 | { | |
13334 | TYPE_LENGTH (type) = 0; | |
13335 | } | |
13336 | ||
137033e9 JB |
13337 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
13338 | declared as private in the package spec, and then defined only | |
13339 | inside the package body. Such types are known as Taft Amendment | |
13340 | Types. When another package uses such a type, an incomplete DIE | |
13341 | may be generated by the compiler. */ | |
02eb380e | 13342 | if (die_is_declaration (die, cu)) |
876cecd0 | 13343 | TYPE_STUB (type) = 1; |
02eb380e | 13344 | |
0626fc76 TT |
13345 | /* Finish the creation of this type by using the enum's children. |
13346 | We must call this even when the underlying type has been provided | |
13347 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
13348 | update_enumeration_type_from_children (die, type, cu); |
13349 | ||
0626fc76 TT |
13350 | /* If this type has an underlying type that is not a stub, then we |
13351 | may use its attributes. We always use the "unsigned" attribute | |
13352 | in this situation, because ordinarily we guess whether the type | |
13353 | is unsigned -- but the guess can be wrong and the underlying type | |
13354 | can tell us the reality. However, we defer to a local size | |
13355 | attribute if one exists, because this lets the compiler override | |
13356 | the underlying type if needed. */ | |
13357 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
13358 | { | |
13359 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
13360 | if (TYPE_LENGTH (type) == 0) | |
13361 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
13362 | } | |
13363 | ||
3d567982 TT |
13364 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
13365 | ||
f792889a | 13366 | return set_die_type (die, type, cu); |
134d01f1 DJ |
13367 | } |
13368 | ||
13369 | /* Given a pointer to a die which begins an enumeration, process all | |
13370 | the dies that define the members of the enumeration, and create the | |
13371 | symbol for the enumeration type. | |
13372 | ||
13373 | NOTE: We reverse the order of the element list. */ | |
13374 | ||
13375 | static void | |
13376 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13377 | { | |
f792889a | 13378 | struct type *this_type; |
134d01f1 | 13379 | |
f792889a DJ |
13380 | this_type = get_die_type (die, cu); |
13381 | if (this_type == NULL) | |
13382 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 13383 | |
639d11d3 | 13384 | if (die->child != NULL) |
c906108c | 13385 | { |
9dc481d3 DE |
13386 | struct die_info *child_die; |
13387 | struct symbol *sym; | |
13388 | struct field *fields = NULL; | |
13389 | int num_fields = 0; | |
15d034d0 | 13390 | const char *name; |
9dc481d3 | 13391 | |
639d11d3 | 13392 | child_die = die->child; |
c906108c SS |
13393 | while (child_die && child_die->tag) |
13394 | { | |
13395 | if (child_die->tag != DW_TAG_enumerator) | |
13396 | { | |
e7c27a73 | 13397 | process_die (child_die, cu); |
c906108c SS |
13398 | } |
13399 | else | |
13400 | { | |
39cbfefa DJ |
13401 | name = dwarf2_name (child_die, cu); |
13402 | if (name) | |
c906108c | 13403 | { |
f792889a | 13404 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
13405 | |
13406 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13407 | { | |
13408 | fields = (struct field *) | |
13409 | xrealloc (fields, | |
13410 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13411 | * sizeof (struct field)); |
c906108c SS |
13412 | } |
13413 | ||
3567439c | 13414 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 13415 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 13416 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
13417 | FIELD_BITSIZE (fields[num_fields]) = 0; |
13418 | ||
13419 | num_fields++; | |
13420 | } | |
13421 | } | |
13422 | ||
13423 | child_die = sibling_die (child_die); | |
13424 | } | |
13425 | ||
13426 | if (num_fields) | |
13427 | { | |
f792889a DJ |
13428 | TYPE_NFIELDS (this_type) = num_fields; |
13429 | TYPE_FIELDS (this_type) = (struct field *) | |
13430 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
13431 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 13432 | sizeof (struct field) * num_fields); |
b8c9b27d | 13433 | xfree (fields); |
c906108c | 13434 | } |
c906108c | 13435 | } |
134d01f1 | 13436 | |
6c83ed52 TT |
13437 | /* If we are reading an enum from a .debug_types unit, and the enum |
13438 | is a declaration, and the enum is not the signatured type in the | |
13439 | unit, then we do not want to add a symbol for it. Adding a | |
13440 | symbol would in some cases obscure the true definition of the | |
13441 | enum, giving users an incomplete type when the definition is | |
13442 | actually available. Note that we do not want to do this for all | |
13443 | enums which are just declarations, because C++0x allows forward | |
13444 | enum declarations. */ | |
3019eac3 | 13445 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
13446 | && die_is_declaration (die, cu)) |
13447 | { | |
52dc124a | 13448 | struct signatured_type *sig_type; |
6c83ed52 | 13449 | |
c0f78cd4 | 13450 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
13451 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
13452 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
13453 | return; |
13454 | } | |
13455 | ||
f792889a | 13456 | new_symbol (die, this_type, cu); |
c906108c SS |
13457 | } |
13458 | ||
13459 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
13460 | the DIE's type field. For now, this only handles one dimensional | |
13461 | arrays. */ | |
13462 | ||
f792889a | 13463 | static struct type * |
e7c27a73 | 13464 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13465 | { |
e7c27a73 | 13466 | struct objfile *objfile = cu->objfile; |
c906108c | 13467 | struct die_info *child_die; |
7e314c57 | 13468 | struct type *type; |
c906108c SS |
13469 | struct type *element_type, *range_type, *index_type; |
13470 | struct type **range_types = NULL; | |
13471 | struct attribute *attr; | |
13472 | int ndim = 0; | |
13473 | struct cleanup *back_to; | |
15d034d0 | 13474 | const char *name; |
dc53a7ad | 13475 | unsigned int bit_stride = 0; |
c906108c | 13476 | |
e7c27a73 | 13477 | element_type = die_type (die, cu); |
c906108c | 13478 | |
7e314c57 JK |
13479 | /* The die_type call above may have already set the type for this DIE. */ |
13480 | type = get_die_type (die, cu); | |
13481 | if (type) | |
13482 | return type; | |
13483 | ||
dc53a7ad JB |
13484 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
13485 | if (attr != NULL) | |
13486 | bit_stride = DW_UNSND (attr) * 8; | |
13487 | ||
13488 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
13489 | if (attr != NULL) | |
13490 | bit_stride = DW_UNSND (attr); | |
13491 | ||
c906108c SS |
13492 | /* Irix 6.2 native cc creates array types without children for |
13493 | arrays with unspecified length. */ | |
639d11d3 | 13494 | if (die->child == NULL) |
c906108c | 13495 | { |
46bf5051 | 13496 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 13497 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
13498 | type = create_array_type_with_stride (NULL, element_type, range_type, |
13499 | bit_stride); | |
f792889a | 13500 | return set_die_type (die, type, cu); |
c906108c SS |
13501 | } |
13502 | ||
13503 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 13504 | child_die = die->child; |
c906108c SS |
13505 | while (child_die && child_die->tag) |
13506 | { | |
13507 | if (child_die->tag == DW_TAG_subrange_type) | |
13508 | { | |
f792889a | 13509 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 13510 | |
f792889a | 13511 | if (child_type != NULL) |
a02abb62 | 13512 | { |
0963b4bd MS |
13513 | /* The range type was succesfully read. Save it for the |
13514 | array type creation. */ | |
a02abb62 JB |
13515 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
13516 | { | |
13517 | range_types = (struct type **) | |
13518 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
13519 | * sizeof (struct type *)); | |
13520 | if (ndim == 0) | |
13521 | make_cleanup (free_current_contents, &range_types); | |
13522 | } | |
f792889a | 13523 | range_types[ndim++] = child_type; |
a02abb62 | 13524 | } |
c906108c SS |
13525 | } |
13526 | child_die = sibling_die (child_die); | |
13527 | } | |
13528 | ||
13529 | /* Dwarf2 dimensions are output from left to right, create the | |
13530 | necessary array types in backwards order. */ | |
7ca2d3a3 | 13531 | |
c906108c | 13532 | type = element_type; |
7ca2d3a3 DL |
13533 | |
13534 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
13535 | { | |
13536 | int i = 0; | |
9a619af0 | 13537 | |
7ca2d3a3 | 13538 | while (i < ndim) |
dc53a7ad JB |
13539 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
13540 | bit_stride); | |
7ca2d3a3 DL |
13541 | } |
13542 | else | |
13543 | { | |
13544 | while (ndim-- > 0) | |
dc53a7ad JB |
13545 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
13546 | bit_stride); | |
7ca2d3a3 | 13547 | } |
c906108c | 13548 | |
f5f8a009 EZ |
13549 | /* Understand Dwarf2 support for vector types (like they occur on |
13550 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
13551 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
13552 | custom vendor extension. The main difference between a regular | |
13553 | array and the vector variant is that vectors are passed by value | |
13554 | to functions. */ | |
e142c38c | 13555 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 13556 | if (attr) |
ea37ba09 | 13557 | make_vector_type (type); |
f5f8a009 | 13558 | |
dbc98a8b KW |
13559 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
13560 | implementation may choose to implement triple vectors using this | |
13561 | attribute. */ | |
13562 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
13563 | if (attr) | |
13564 | { | |
13565 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
13566 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13567 | else | |
3e43a32a MS |
13568 | complaint (&symfile_complaints, |
13569 | _("DW_AT_byte_size for array type smaller " | |
13570 | "than the total size of elements")); | |
dbc98a8b KW |
13571 | } |
13572 | ||
39cbfefa DJ |
13573 | name = dwarf2_name (die, cu); |
13574 | if (name) | |
13575 | TYPE_NAME (type) = name; | |
6e70227d | 13576 | |
0963b4bd | 13577 | /* Install the type in the die. */ |
7e314c57 JK |
13578 | set_die_type (die, type, cu); |
13579 | ||
13580 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13581 | set_descriptive_type (type, die, cu); |
13582 | ||
c906108c SS |
13583 | do_cleanups (back_to); |
13584 | ||
7e314c57 | 13585 | return type; |
c906108c SS |
13586 | } |
13587 | ||
7ca2d3a3 | 13588 | static enum dwarf_array_dim_ordering |
6e70227d | 13589 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
13590 | { |
13591 | struct attribute *attr; | |
13592 | ||
13593 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
13594 | ||
13595 | if (attr) return DW_SND (attr); | |
13596 | ||
0963b4bd MS |
13597 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
13598 | opposite order to the dwarf2 specification, but data is still | |
13599 | laid out as per normal fortran. | |
7ca2d3a3 | 13600 | |
0963b4bd MS |
13601 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
13602 | version checking. */ | |
7ca2d3a3 | 13603 | |
905e0470 PM |
13604 | if (cu->language == language_fortran |
13605 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
13606 | { |
13607 | return DW_ORD_row_major; | |
13608 | } | |
13609 | ||
6e70227d | 13610 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
13611 | { |
13612 | case array_column_major: | |
13613 | return DW_ORD_col_major; | |
13614 | case array_row_major: | |
13615 | default: | |
13616 | return DW_ORD_row_major; | |
13617 | }; | |
13618 | } | |
13619 | ||
72019c9c | 13620 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 13621 | the DIE's type field. */ |
72019c9c | 13622 | |
f792889a | 13623 | static struct type * |
72019c9c GM |
13624 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
13625 | { | |
7e314c57 JK |
13626 | struct type *domain_type, *set_type; |
13627 | struct attribute *attr; | |
f792889a | 13628 | |
7e314c57 JK |
13629 | domain_type = die_type (die, cu); |
13630 | ||
13631 | /* The die_type call above may have already set the type for this DIE. */ | |
13632 | set_type = get_die_type (die, cu); | |
13633 | if (set_type) | |
13634 | return set_type; | |
13635 | ||
13636 | set_type = create_set_type (NULL, domain_type); | |
13637 | ||
13638 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
13639 | if (attr) |
13640 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 13641 | |
f792889a | 13642 | return set_die_type (die, set_type, cu); |
72019c9c | 13643 | } |
7ca2d3a3 | 13644 | |
0971de02 TT |
13645 | /* A helper for read_common_block that creates a locexpr baton. |
13646 | SYM is the symbol which we are marking as computed. | |
13647 | COMMON_DIE is the DIE for the common block. | |
13648 | COMMON_LOC is the location expression attribute for the common | |
13649 | block itself. | |
13650 | MEMBER_LOC is the location expression attribute for the particular | |
13651 | member of the common block that we are processing. | |
13652 | CU is the CU from which the above come. */ | |
13653 | ||
13654 | static void | |
13655 | mark_common_block_symbol_computed (struct symbol *sym, | |
13656 | struct die_info *common_die, | |
13657 | struct attribute *common_loc, | |
13658 | struct attribute *member_loc, | |
13659 | struct dwarf2_cu *cu) | |
13660 | { | |
13661 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13662 | struct dwarf2_locexpr_baton *baton; | |
13663 | gdb_byte *ptr; | |
13664 | unsigned int cu_off; | |
13665 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
13666 | LONGEST offset = 0; | |
13667 | ||
13668 | gdb_assert (common_loc && member_loc); | |
13669 | gdb_assert (attr_form_is_block (common_loc)); | |
13670 | gdb_assert (attr_form_is_block (member_loc) | |
13671 | || attr_form_is_constant (member_loc)); | |
13672 | ||
13673 | baton = obstack_alloc (&objfile->objfile_obstack, | |
13674 | sizeof (struct dwarf2_locexpr_baton)); | |
13675 | baton->per_cu = cu->per_cu; | |
13676 | gdb_assert (baton->per_cu); | |
13677 | ||
13678 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
13679 | ||
13680 | if (attr_form_is_constant (member_loc)) | |
13681 | { | |
13682 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
13683 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
13684 | } | |
13685 | else | |
13686 | baton->size += DW_BLOCK (member_loc)->size; | |
13687 | ||
13688 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
13689 | baton->data = ptr; | |
13690 | ||
13691 | *ptr++ = DW_OP_call4; | |
13692 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
13693 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
13694 | ptr += 4; | |
13695 | ||
13696 | if (attr_form_is_constant (member_loc)) | |
13697 | { | |
13698 | *ptr++ = DW_OP_addr; | |
13699 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
13700 | ptr += cu->header.addr_size; | |
13701 | } | |
13702 | else | |
13703 | { | |
13704 | /* We have to copy the data here, because DW_OP_call4 will only | |
13705 | use a DW_AT_location attribute. */ | |
13706 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
13707 | ptr += DW_BLOCK (member_loc)->size; | |
13708 | } | |
13709 | ||
13710 | *ptr++ = DW_OP_plus; | |
13711 | gdb_assert (ptr - baton->data == baton->size); | |
13712 | ||
0971de02 | 13713 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 13714 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
13715 | } |
13716 | ||
4357ac6c TT |
13717 | /* Create appropriate locally-scoped variables for all the |
13718 | DW_TAG_common_block entries. Also create a struct common_block | |
13719 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
13720 | is used to sepate the common blocks name namespace from regular | |
13721 | variable names. */ | |
c906108c SS |
13722 | |
13723 | static void | |
e7c27a73 | 13724 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13725 | { |
0971de02 TT |
13726 | struct attribute *attr; |
13727 | ||
13728 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
13729 | if (attr) | |
13730 | { | |
13731 | /* Support the .debug_loc offsets. */ | |
13732 | if (attr_form_is_block (attr)) | |
13733 | { | |
13734 | /* Ok. */ | |
13735 | } | |
13736 | else if (attr_form_is_section_offset (attr)) | |
13737 | { | |
13738 | dwarf2_complex_location_expr_complaint (); | |
13739 | attr = NULL; | |
13740 | } | |
13741 | else | |
13742 | { | |
13743 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
13744 | "common block member"); | |
13745 | attr = NULL; | |
13746 | } | |
13747 | } | |
13748 | ||
639d11d3 | 13749 | if (die->child != NULL) |
c906108c | 13750 | { |
4357ac6c TT |
13751 | struct objfile *objfile = cu->objfile; |
13752 | struct die_info *child_die; | |
13753 | size_t n_entries = 0, size; | |
13754 | struct common_block *common_block; | |
13755 | struct symbol *sym; | |
74ac6d43 | 13756 | |
4357ac6c TT |
13757 | for (child_die = die->child; |
13758 | child_die && child_die->tag; | |
13759 | child_die = sibling_die (child_die)) | |
13760 | ++n_entries; | |
13761 | ||
13762 | size = (sizeof (struct common_block) | |
13763 | + (n_entries - 1) * sizeof (struct symbol *)); | |
13764 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
13765 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
13766 | common_block->n_entries = 0; | |
13767 | ||
13768 | for (child_die = die->child; | |
13769 | child_die && child_die->tag; | |
13770 | child_die = sibling_die (child_die)) | |
13771 | { | |
13772 | /* Create the symbol in the DW_TAG_common_block block in the current | |
13773 | symbol scope. */ | |
e7c27a73 | 13774 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
13775 | if (sym != NULL) |
13776 | { | |
13777 | struct attribute *member_loc; | |
13778 | ||
13779 | common_block->contents[common_block->n_entries++] = sym; | |
13780 | ||
13781 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
13782 | cu); | |
13783 | if (member_loc) | |
13784 | { | |
13785 | /* GDB has handled this for a long time, but it is | |
13786 | not specified by DWARF. It seems to have been | |
13787 | emitted by gfortran at least as recently as: | |
13788 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
13789 | complaint (&symfile_complaints, | |
13790 | _("Variable in common block has " | |
13791 | "DW_AT_data_member_location " | |
13792 | "- DIE at 0x%x [in module %s]"), | |
4262abfb JK |
13793 | child_die->offset.sect_off, |
13794 | objfile_name (cu->objfile)); | |
0971de02 TT |
13795 | |
13796 | if (attr_form_is_section_offset (member_loc)) | |
13797 | dwarf2_complex_location_expr_complaint (); | |
13798 | else if (attr_form_is_constant (member_loc) | |
13799 | || attr_form_is_block (member_loc)) | |
13800 | { | |
13801 | if (attr) | |
13802 | mark_common_block_symbol_computed (sym, die, attr, | |
13803 | member_loc, cu); | |
13804 | } | |
13805 | else | |
13806 | dwarf2_complex_location_expr_complaint (); | |
13807 | } | |
13808 | } | |
c906108c | 13809 | } |
4357ac6c TT |
13810 | |
13811 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
13812 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
13813 | } |
13814 | } | |
13815 | ||
0114d602 | 13816 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 13817 | |
0114d602 DJ |
13818 | static struct type * |
13819 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 13820 | { |
e7c27a73 | 13821 | struct objfile *objfile = cu->objfile; |
0114d602 | 13822 | const char *previous_prefix, *name; |
9219021c | 13823 | int is_anonymous; |
0114d602 DJ |
13824 | struct type *type; |
13825 | ||
13826 | /* For extensions, reuse the type of the original namespace. */ | |
13827 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
13828 | { | |
13829 | struct die_info *ext_die; | |
13830 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 13831 | |
0114d602 DJ |
13832 | ext_die = dwarf2_extension (die, &ext_cu); |
13833 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
13834 | |
13835 | /* EXT_CU may not be the same as CU. | |
02142a6c | 13836 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
13837 | return set_die_type (die, type, cu); |
13838 | } | |
9219021c | 13839 | |
e142c38c | 13840 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
13841 | |
13842 | /* Now build the name of the current namespace. */ | |
13843 | ||
0114d602 DJ |
13844 | previous_prefix = determine_prefix (die, cu); |
13845 | if (previous_prefix[0] != '\0') | |
13846 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 13847 | previous_prefix, name, 0, cu); |
0114d602 DJ |
13848 | |
13849 | /* Create the type. */ | |
13850 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
13851 | objfile); | |
abee88f2 | 13852 | TYPE_NAME (type) = name; |
0114d602 DJ |
13853 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
13854 | ||
60531b24 | 13855 | return set_die_type (die, type, cu); |
0114d602 DJ |
13856 | } |
13857 | ||
13858 | /* Read a C++ namespace. */ | |
13859 | ||
13860 | static void | |
13861 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
13862 | { | |
13863 | struct objfile *objfile = cu->objfile; | |
0114d602 | 13864 | int is_anonymous; |
9219021c | 13865 | |
5c4e30ca DC |
13866 | /* Add a symbol associated to this if we haven't seen the namespace |
13867 | before. Also, add a using directive if it's an anonymous | |
13868 | namespace. */ | |
9219021c | 13869 | |
f2f0e013 | 13870 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
13871 | { |
13872 | struct type *type; | |
13873 | ||
0114d602 | 13874 | type = read_type_die (die, cu); |
e7c27a73 | 13875 | new_symbol (die, type, cu); |
5c4e30ca | 13876 | |
e8e80198 | 13877 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 13878 | if (is_anonymous) |
0114d602 DJ |
13879 | { |
13880 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 13881 | |
c0cc3a76 | 13882 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
12aaed36 | 13883 | NULL, NULL, 0, &objfile->objfile_obstack); |
0114d602 | 13884 | } |
5c4e30ca | 13885 | } |
9219021c | 13886 | |
639d11d3 | 13887 | if (die->child != NULL) |
d9fa45fe | 13888 | { |
639d11d3 | 13889 | struct die_info *child_die = die->child; |
6e70227d | 13890 | |
d9fa45fe DC |
13891 | while (child_die && child_die->tag) |
13892 | { | |
e7c27a73 | 13893 | process_die (child_die, cu); |
d9fa45fe DC |
13894 | child_die = sibling_die (child_die); |
13895 | } | |
13896 | } | |
38d518c9 EZ |
13897 | } |
13898 | ||
f55ee35c JK |
13899 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
13900 | imported module. Still we need that type as local Fortran "use ... only" | |
13901 | declaration imports depend on the created type in determine_prefix. */ | |
13902 | ||
13903 | static struct type * | |
13904 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
13905 | { | |
13906 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 13907 | const char *module_name; |
f55ee35c JK |
13908 | struct type *type; |
13909 | ||
13910 | module_name = dwarf2_name (die, cu); | |
13911 | if (!module_name) | |
3e43a32a MS |
13912 | complaint (&symfile_complaints, |
13913 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 13914 | die->offset.sect_off); |
f55ee35c JK |
13915 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
13916 | ||
13917 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
13918 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
13919 | ||
13920 | return set_die_type (die, type, cu); | |
13921 | } | |
13922 | ||
5d7cb8df JK |
13923 | /* Read a Fortran module. */ |
13924 | ||
13925 | static void | |
13926 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
13927 | { | |
13928 | struct die_info *child_die = die->child; | |
530e8392 KB |
13929 | struct type *type; |
13930 | ||
13931 | type = read_type_die (die, cu); | |
13932 | new_symbol (die, type, cu); | |
5d7cb8df | 13933 | |
5d7cb8df JK |
13934 | while (child_die && child_die->tag) |
13935 | { | |
13936 | process_die (child_die, cu); | |
13937 | child_die = sibling_die (child_die); | |
13938 | } | |
13939 | } | |
13940 | ||
38d518c9 EZ |
13941 | /* Return the name of the namespace represented by DIE. Set |
13942 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
13943 | namespace. */ | |
13944 | ||
13945 | static const char * | |
e142c38c | 13946 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
13947 | { |
13948 | struct die_info *current_die; | |
13949 | const char *name = NULL; | |
13950 | ||
13951 | /* Loop through the extensions until we find a name. */ | |
13952 | ||
13953 | for (current_die = die; | |
13954 | current_die != NULL; | |
f2f0e013 | 13955 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 13956 | { |
e142c38c | 13957 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
13958 | if (name != NULL) |
13959 | break; | |
13960 | } | |
13961 | ||
13962 | /* Is it an anonymous namespace? */ | |
13963 | ||
13964 | *is_anonymous = (name == NULL); | |
13965 | if (*is_anonymous) | |
2b1dbab0 | 13966 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
13967 | |
13968 | return name; | |
d9fa45fe DC |
13969 | } |
13970 | ||
c906108c SS |
13971 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
13972 | the user defined type vector. */ | |
13973 | ||
f792889a | 13974 | static struct type * |
e7c27a73 | 13975 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13976 | { |
5e2b427d | 13977 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 13978 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 13979 | struct type *type; |
8b2dbe47 KB |
13980 | struct attribute *attr_byte_size; |
13981 | struct attribute *attr_address_class; | |
13982 | int byte_size, addr_class; | |
7e314c57 JK |
13983 | struct type *target_type; |
13984 | ||
13985 | target_type = die_type (die, cu); | |
c906108c | 13986 | |
7e314c57 JK |
13987 | /* The die_type call above may have already set the type for this DIE. */ |
13988 | type = get_die_type (die, cu); | |
13989 | if (type) | |
13990 | return type; | |
13991 | ||
13992 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 13993 | |
e142c38c | 13994 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
13995 | if (attr_byte_size) |
13996 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 13997 | else |
8b2dbe47 KB |
13998 | byte_size = cu_header->addr_size; |
13999 | ||
e142c38c | 14000 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14001 | if (attr_address_class) |
14002 | addr_class = DW_UNSND (attr_address_class); | |
14003 | else | |
14004 | addr_class = DW_ADDR_none; | |
14005 | ||
14006 | /* If the pointer size or address class is different than the | |
14007 | default, create a type variant marked as such and set the | |
14008 | length accordingly. */ | |
14009 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14010 | { |
5e2b427d | 14011 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14012 | { |
14013 | int type_flags; | |
14014 | ||
849957d9 | 14015 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14016 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14017 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14018 | == 0); | |
8b2dbe47 KB |
14019 | type = make_type_with_address_space (type, type_flags); |
14020 | } | |
14021 | else if (TYPE_LENGTH (type) != byte_size) | |
14022 | { | |
3e43a32a MS |
14023 | complaint (&symfile_complaints, |
14024 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14025 | } |
6e70227d | 14026 | else |
9a619af0 MS |
14027 | { |
14028 | /* Should we also complain about unhandled address classes? */ | |
14029 | } | |
c906108c | 14030 | } |
8b2dbe47 KB |
14031 | |
14032 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14033 | return set_die_type (die, type, cu); |
c906108c SS |
14034 | } |
14035 | ||
14036 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14037 | the user defined type vector. */ | |
14038 | ||
f792889a | 14039 | static struct type * |
e7c27a73 | 14040 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14041 | { |
14042 | struct type *type; | |
14043 | struct type *to_type; | |
14044 | struct type *domain; | |
14045 | ||
e7c27a73 DJ |
14046 | to_type = die_type (die, cu); |
14047 | domain = die_containing_type (die, cu); | |
0d5de010 | 14048 | |
7e314c57 JK |
14049 | /* The calls above may have already set the type for this DIE. */ |
14050 | type = get_die_type (die, cu); | |
14051 | if (type) | |
14052 | return type; | |
14053 | ||
0d5de010 DJ |
14054 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14055 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14056 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14057 | { | |
14058 | struct type *new_type = alloc_type (cu->objfile); | |
14059 | ||
14060 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14061 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14062 | TYPE_VARARGS (to_type)); | |
14063 | type = lookup_methodptr_type (new_type); | |
14064 | } | |
0d5de010 DJ |
14065 | else |
14066 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14067 | |
f792889a | 14068 | return set_die_type (die, type, cu); |
c906108c SS |
14069 | } |
14070 | ||
14071 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
14072 | the user defined type vector. */ | |
14073 | ||
f792889a | 14074 | static struct type * |
e7c27a73 | 14075 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14076 | { |
e7c27a73 | 14077 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14078 | struct type *type, *target_type; |
c906108c SS |
14079 | struct attribute *attr; |
14080 | ||
7e314c57 JK |
14081 | target_type = die_type (die, cu); |
14082 | ||
14083 | /* The die_type call above may have already set the type for this DIE. */ | |
14084 | type = get_die_type (die, cu); | |
14085 | if (type) | |
14086 | return type; | |
14087 | ||
14088 | type = lookup_reference_type (target_type); | |
e142c38c | 14089 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14090 | if (attr) |
14091 | { | |
14092 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14093 | } | |
14094 | else | |
14095 | { | |
107d2387 | 14096 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14097 | } |
f792889a | 14098 | return set_die_type (die, type, cu); |
c906108c SS |
14099 | } |
14100 | ||
cf363f18 MW |
14101 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14102 | outputs DWARF type qualifiers that apply to an array, not the | |
14103 | element type. But GDB relies on the array element type to carry | |
14104 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14105 | specification. */ | |
14106 | ||
14107 | static struct type * | |
14108 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14109 | struct type *base_type, int cnst, int voltl) | |
14110 | { | |
14111 | struct type *el_type, *inner_array; | |
14112 | ||
14113 | base_type = copy_type (base_type); | |
14114 | inner_array = base_type; | |
14115 | ||
14116 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14117 | { | |
14118 | TYPE_TARGET_TYPE (inner_array) = | |
14119 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14120 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14121 | } | |
14122 | ||
14123 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14124 | cnst |= TYPE_CONST (el_type); | |
14125 | voltl |= TYPE_VOLATILE (el_type); | |
14126 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14127 | ||
14128 | return set_die_type (die, base_type, cu); | |
14129 | } | |
14130 | ||
f792889a | 14131 | static struct type * |
e7c27a73 | 14132 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14133 | { |
f792889a | 14134 | struct type *base_type, *cv_type; |
c906108c | 14135 | |
e7c27a73 | 14136 | base_type = die_type (die, cu); |
7e314c57 JK |
14137 | |
14138 | /* The die_type call above may have already set the type for this DIE. */ | |
14139 | cv_type = get_die_type (die, cu); | |
14140 | if (cv_type) | |
14141 | return cv_type; | |
14142 | ||
2f608a3a KW |
14143 | /* In case the const qualifier is applied to an array type, the element type |
14144 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14145 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14146 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14147 | |
f792889a DJ |
14148 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14149 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14150 | } |
14151 | ||
f792889a | 14152 | static struct type * |
e7c27a73 | 14153 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14154 | { |
f792889a | 14155 | struct type *base_type, *cv_type; |
c906108c | 14156 | |
e7c27a73 | 14157 | base_type = die_type (die, cu); |
7e314c57 JK |
14158 | |
14159 | /* The die_type call above may have already set the type for this DIE. */ | |
14160 | cv_type = get_die_type (die, cu); | |
14161 | if (cv_type) | |
14162 | return cv_type; | |
14163 | ||
cf363f18 MW |
14164 | /* In case the volatile qualifier is applied to an array type, the |
14165 | element type is so qualified, not the array type (section 6.7.3 | |
14166 | of C99). */ | |
14167 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14168 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14169 | ||
f792889a DJ |
14170 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14171 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14172 | } |
14173 | ||
06d66ee9 TT |
14174 | /* Handle DW_TAG_restrict_type. */ |
14175 | ||
14176 | static struct type * | |
14177 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14178 | { | |
14179 | struct type *base_type, *cv_type; | |
14180 | ||
14181 | base_type = die_type (die, cu); | |
14182 | ||
14183 | /* The die_type call above may have already set the type for this DIE. */ | |
14184 | cv_type = get_die_type (die, cu); | |
14185 | if (cv_type) | |
14186 | return cv_type; | |
14187 | ||
14188 | cv_type = make_restrict_type (base_type); | |
14189 | return set_die_type (die, cv_type, cu); | |
14190 | } | |
14191 | ||
c906108c SS |
14192 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14193 | the user defined type vector. It isn't really a user defined type, | |
14194 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14195 | attribute to reference it. */ | |
14196 | ||
f792889a | 14197 | static struct type * |
e7c27a73 | 14198 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14199 | { |
e7c27a73 | 14200 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14201 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14202 | struct type *type, *range_type, *index_type, *char_type; |
14203 | struct attribute *attr; | |
14204 | unsigned int length; | |
14205 | ||
e142c38c | 14206 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14207 | if (attr) |
14208 | { | |
14209 | length = DW_UNSND (attr); | |
14210 | } | |
14211 | else | |
14212 | { | |
0963b4bd | 14213 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14214 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14215 | if (attr) |
14216 | { | |
14217 | length = DW_UNSND (attr); | |
14218 | } | |
14219 | else | |
14220 | { | |
14221 | length = 1; | |
14222 | } | |
c906108c | 14223 | } |
6ccb9162 | 14224 | |
46bf5051 | 14225 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14226 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14227 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14228 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14229 | |
f792889a | 14230 | return set_die_type (die, type, cu); |
c906108c SS |
14231 | } |
14232 | ||
4d804846 JB |
14233 | /* Assuming that DIE corresponds to a function, returns nonzero |
14234 | if the function is prototyped. */ | |
14235 | ||
14236 | static int | |
14237 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14238 | { | |
14239 | struct attribute *attr; | |
14240 | ||
14241 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14242 | if (attr && (DW_UNSND (attr) != 0)) | |
14243 | return 1; | |
14244 | ||
14245 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14246 | is only meaninful for C, but the concept also extends to other | |
14247 | languages that allow unprototyped functions (Eg: Objective C). | |
14248 | For all other languages, assume that functions are always | |
14249 | prototyped. */ | |
14250 | if (cu->language != language_c | |
14251 | && cu->language != language_objc | |
14252 | && cu->language != language_opencl) | |
14253 | return 1; | |
14254 | ||
14255 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14256 | prototyped and unprototyped functions; default to prototyped, | |
14257 | since that is more common in modern code (and RealView warns | |
14258 | about unprototyped functions). */ | |
14259 | if (producer_is_realview (cu->producer)) | |
14260 | return 1; | |
14261 | ||
14262 | return 0; | |
14263 | } | |
14264 | ||
c906108c SS |
14265 | /* Handle DIES due to C code like: |
14266 | ||
14267 | struct foo | |
c5aa993b JM |
14268 | { |
14269 | int (*funcp)(int a, long l); | |
14270 | int b; | |
14271 | }; | |
c906108c | 14272 | |
0963b4bd | 14273 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14274 | |
f792889a | 14275 | static struct type * |
e7c27a73 | 14276 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14277 | { |
bb5ed363 | 14278 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14279 | struct type *type; /* Type that this function returns. */ |
14280 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14281 | struct attribute *attr; |
14282 | ||
e7c27a73 | 14283 | type = die_type (die, cu); |
7e314c57 JK |
14284 | |
14285 | /* The die_type call above may have already set the type for this DIE. */ | |
14286 | ftype = get_die_type (die, cu); | |
14287 | if (ftype) | |
14288 | return ftype; | |
14289 | ||
0c8b41f1 | 14290 | ftype = lookup_function_type (type); |
c906108c | 14291 | |
4d804846 | 14292 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 14293 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 14294 | |
c055b101 CV |
14295 | /* Store the calling convention in the type if it's available in |
14296 | the subroutine die. Otherwise set the calling convention to | |
14297 | the default value DW_CC_normal. */ | |
14298 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
14299 | if (attr) |
14300 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
14301 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
14302 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
14303 | else | |
14304 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
14305 | |
14306 | /* We need to add the subroutine type to the die immediately so | |
14307 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 14308 | declared as the same subroutine type. */ |
76c10ea2 | 14309 | set_die_type (die, ftype, cu); |
6e70227d | 14310 | |
639d11d3 | 14311 | if (die->child != NULL) |
c906108c | 14312 | { |
bb5ed363 | 14313 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 14314 | struct die_info *child_die; |
8072405b | 14315 | int nparams, iparams; |
c906108c SS |
14316 | |
14317 | /* Count the number of parameters. | |
14318 | FIXME: GDB currently ignores vararg functions, but knows about | |
14319 | vararg member functions. */ | |
8072405b | 14320 | nparams = 0; |
639d11d3 | 14321 | child_die = die->child; |
c906108c SS |
14322 | while (child_die && child_die->tag) |
14323 | { | |
14324 | if (child_die->tag == DW_TAG_formal_parameter) | |
14325 | nparams++; | |
14326 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 14327 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
14328 | child_die = sibling_die (child_die); |
14329 | } | |
14330 | ||
14331 | /* Allocate storage for parameters and fill them in. */ | |
14332 | TYPE_NFIELDS (ftype) = nparams; | |
14333 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 14334 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 14335 | |
8072405b JK |
14336 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
14337 | even if we error out during the parameters reading below. */ | |
14338 | for (iparams = 0; iparams < nparams; iparams++) | |
14339 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
14340 | ||
14341 | iparams = 0; | |
639d11d3 | 14342 | child_die = die->child; |
c906108c SS |
14343 | while (child_die && child_die->tag) |
14344 | { | |
14345 | if (child_die->tag == DW_TAG_formal_parameter) | |
14346 | { | |
3ce3b1ba PA |
14347 | struct type *arg_type; |
14348 | ||
14349 | /* DWARF version 2 has no clean way to discern C++ | |
14350 | static and non-static member functions. G++ helps | |
14351 | GDB by marking the first parameter for non-static | |
14352 | member functions (which is the this pointer) as | |
14353 | artificial. We pass this information to | |
14354 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
14355 | ||
14356 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
14357 | 4.5 does not yet generate. */ | |
e142c38c | 14358 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
14359 | if (attr) |
14360 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
14361 | else | |
418835cc KS |
14362 | { |
14363 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
14364 | ||
14365 | /* GCC/43521: In java, the formal parameter | |
14366 | "this" is sometimes not marked with DW_AT_artificial. */ | |
14367 | if (cu->language == language_java) | |
14368 | { | |
14369 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 14370 | |
418835cc KS |
14371 | if (name && !strcmp (name, "this")) |
14372 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
14373 | } | |
14374 | } | |
3ce3b1ba PA |
14375 | arg_type = die_type (child_die, cu); |
14376 | ||
14377 | /* RealView does not mark THIS as const, which the testsuite | |
14378 | expects. GCC marks THIS as const in method definitions, | |
14379 | but not in the class specifications (GCC PR 43053). */ | |
14380 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
14381 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
14382 | { | |
14383 | int is_this = 0; | |
14384 | struct dwarf2_cu *arg_cu = cu; | |
14385 | const char *name = dwarf2_name (child_die, cu); | |
14386 | ||
14387 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
14388 | if (attr) | |
14389 | { | |
14390 | /* If the compiler emits this, use it. */ | |
14391 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
14392 | is_this = 1; | |
14393 | } | |
14394 | else if (name && strcmp (name, "this") == 0) | |
14395 | /* Function definitions will have the argument names. */ | |
14396 | is_this = 1; | |
14397 | else if (name == NULL && iparams == 0) | |
14398 | /* Declarations may not have the names, so like | |
14399 | elsewhere in GDB, assume an artificial first | |
14400 | argument is "this". */ | |
14401 | is_this = 1; | |
14402 | ||
14403 | if (is_this) | |
14404 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
14405 | arg_type, 0); | |
14406 | } | |
14407 | ||
14408 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
14409 | iparams++; |
14410 | } | |
14411 | child_die = sibling_die (child_die); | |
14412 | } | |
14413 | } | |
14414 | ||
76c10ea2 | 14415 | return ftype; |
c906108c SS |
14416 | } |
14417 | ||
f792889a | 14418 | static struct type * |
e7c27a73 | 14419 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14420 | { |
e7c27a73 | 14421 | struct objfile *objfile = cu->objfile; |
0114d602 | 14422 | const char *name = NULL; |
3c8e0968 | 14423 | struct type *this_type, *target_type; |
c906108c | 14424 | |
94af9270 | 14425 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 14426 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 14427 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 14428 | TYPE_NAME (this_type) = name; |
f792889a | 14429 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
14430 | target_type = die_type (die, cu); |
14431 | if (target_type != this_type) | |
14432 | TYPE_TARGET_TYPE (this_type) = target_type; | |
14433 | else | |
14434 | { | |
14435 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
14436 | spec and cause infinite loops in GDB. */ | |
14437 | complaint (&symfile_complaints, | |
14438 | _("Self-referential DW_TAG_typedef " | |
14439 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14440 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
14441 | TYPE_TARGET_TYPE (this_type) = NULL; |
14442 | } | |
f792889a | 14443 | return this_type; |
c906108c SS |
14444 | } |
14445 | ||
14446 | /* Find a representation of a given base type and install | |
14447 | it in the TYPE field of the die. */ | |
14448 | ||
f792889a | 14449 | static struct type * |
e7c27a73 | 14450 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14451 | { |
e7c27a73 | 14452 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14453 | struct type *type; |
14454 | struct attribute *attr; | |
14455 | int encoding = 0, size = 0; | |
15d034d0 | 14456 | const char *name; |
6ccb9162 UW |
14457 | enum type_code code = TYPE_CODE_INT; |
14458 | int type_flags = 0; | |
14459 | struct type *target_type = NULL; | |
c906108c | 14460 | |
e142c38c | 14461 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
14462 | if (attr) |
14463 | { | |
14464 | encoding = DW_UNSND (attr); | |
14465 | } | |
e142c38c | 14466 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14467 | if (attr) |
14468 | { | |
14469 | size = DW_UNSND (attr); | |
14470 | } | |
39cbfefa | 14471 | name = dwarf2_name (die, cu); |
6ccb9162 | 14472 | if (!name) |
c906108c | 14473 | { |
6ccb9162 UW |
14474 | complaint (&symfile_complaints, |
14475 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 14476 | } |
6ccb9162 UW |
14477 | |
14478 | switch (encoding) | |
c906108c | 14479 | { |
6ccb9162 UW |
14480 | case DW_ATE_address: |
14481 | /* Turn DW_ATE_address into a void * pointer. */ | |
14482 | code = TYPE_CODE_PTR; | |
14483 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14484 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
14485 | break; | |
14486 | case DW_ATE_boolean: | |
14487 | code = TYPE_CODE_BOOL; | |
14488 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14489 | break; | |
14490 | case DW_ATE_complex_float: | |
14491 | code = TYPE_CODE_COMPLEX; | |
14492 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
14493 | break; | |
14494 | case DW_ATE_decimal_float: | |
14495 | code = TYPE_CODE_DECFLOAT; | |
14496 | break; | |
14497 | case DW_ATE_float: | |
14498 | code = TYPE_CODE_FLT; | |
14499 | break; | |
14500 | case DW_ATE_signed: | |
14501 | break; | |
14502 | case DW_ATE_unsigned: | |
14503 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
14504 | if (cu->language == language_fortran |
14505 | && name | |
14506 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
14507 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
14508 | break; |
14509 | case DW_ATE_signed_char: | |
6e70227d | 14510 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14511 | || cu->language == language_pascal |
14512 | || cu->language == language_fortran) | |
6ccb9162 UW |
14513 | code = TYPE_CODE_CHAR; |
14514 | break; | |
14515 | case DW_ATE_unsigned_char: | |
868a0084 | 14516 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14517 | || cu->language == language_pascal |
14518 | || cu->language == language_fortran) | |
6ccb9162 UW |
14519 | code = TYPE_CODE_CHAR; |
14520 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14521 | break; | |
75079b2b TT |
14522 | case DW_ATE_UTF: |
14523 | /* We just treat this as an integer and then recognize the | |
14524 | type by name elsewhere. */ | |
14525 | break; | |
14526 | ||
6ccb9162 UW |
14527 | default: |
14528 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
14529 | dwarf_type_encoding_name (encoding)); | |
14530 | break; | |
c906108c | 14531 | } |
6ccb9162 | 14532 | |
0114d602 DJ |
14533 | type = init_type (code, size, type_flags, NULL, objfile); |
14534 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
14535 | TYPE_TARGET_TYPE (type) = target_type; |
14536 | ||
0114d602 | 14537 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 14538 | TYPE_NOSIGN (type) = 1; |
0114d602 | 14539 | |
f792889a | 14540 | return set_die_type (die, type, cu); |
c906108c SS |
14541 | } |
14542 | ||
80180f79 SA |
14543 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
14544 | resulting value of the attribute into struct bound_prop. | |
14545 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
14546 | ||
14547 | static int | |
14548 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
14549 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
14550 | { | |
14551 | struct dwarf2_property_baton *baton; | |
14552 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
14553 | ||
14554 | if (attr == NULL || prop == NULL) | |
14555 | return 0; | |
14556 | ||
14557 | if (attr_form_is_block (attr)) | |
14558 | { | |
14559 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14560 | baton->referenced_type = NULL; | |
14561 | baton->locexpr.per_cu = cu->per_cu; | |
14562 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
14563 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
14564 | prop->data.baton = baton; | |
14565 | prop->kind = PROP_LOCEXPR; | |
14566 | gdb_assert (prop->data.baton != NULL); | |
14567 | } | |
14568 | else if (attr_form_is_ref (attr)) | |
14569 | { | |
14570 | struct dwarf2_cu *target_cu = cu; | |
14571 | struct die_info *target_die; | |
14572 | struct attribute *target_attr; | |
14573 | ||
14574 | target_die = follow_die_ref (die, attr, &target_cu); | |
14575 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
14576 | if (target_attr == NULL) | |
14577 | return 0; | |
14578 | ||
14579 | if (attr_form_is_section_offset (target_attr)) | |
14580 | { | |
14581 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14582 | baton->referenced_type = die_type (target_die, target_cu); | |
14583 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
14584 | prop->data.baton = baton; | |
14585 | prop->kind = PROP_LOCLIST; | |
14586 | gdb_assert (prop->data.baton != NULL); | |
14587 | } | |
14588 | else if (attr_form_is_block (target_attr)) | |
14589 | { | |
14590 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14591 | baton->referenced_type = die_type (target_die, target_cu); | |
14592 | baton->locexpr.per_cu = cu->per_cu; | |
14593 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
14594 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
14595 | prop->data.baton = baton; | |
14596 | prop->kind = PROP_LOCEXPR; | |
14597 | gdb_assert (prop->data.baton != NULL); | |
14598 | } | |
14599 | else | |
14600 | { | |
14601 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14602 | "dynamic property"); | |
14603 | return 0; | |
14604 | } | |
14605 | } | |
14606 | else if (attr_form_is_constant (attr)) | |
14607 | { | |
14608 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
14609 | prop->kind = PROP_CONST; | |
14610 | } | |
14611 | else | |
14612 | { | |
14613 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
14614 | dwarf2_name (die, cu)); | |
14615 | return 0; | |
14616 | } | |
14617 | ||
14618 | return 1; | |
14619 | } | |
14620 | ||
a02abb62 JB |
14621 | /* Read the given DW_AT_subrange DIE. */ |
14622 | ||
f792889a | 14623 | static struct type * |
a02abb62 JB |
14624 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
14625 | { | |
4c9ad8c2 | 14626 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
14627 | struct type *range_type; |
14628 | struct attribute *attr; | |
729efb13 | 14629 | struct dynamic_prop low, high; |
4fae6e18 | 14630 | int low_default_is_valid; |
c451ebe5 | 14631 | int high_bound_is_count = 0; |
15d034d0 | 14632 | const char *name; |
43bbcdc2 | 14633 | LONGEST negative_mask; |
e77813c8 | 14634 | |
4c9ad8c2 TT |
14635 | orig_base_type = die_type (die, cu); |
14636 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
14637 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
14638 | creating the range type, but we use the result of check_typedef | |
14639 | when examining properties of the type. */ | |
14640 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 14641 | |
7e314c57 JK |
14642 | /* The die_type call above may have already set the type for this DIE. */ |
14643 | range_type = get_die_type (die, cu); | |
14644 | if (range_type) | |
14645 | return range_type; | |
14646 | ||
729efb13 SA |
14647 | low.kind = PROP_CONST; |
14648 | high.kind = PROP_CONST; | |
14649 | high.data.const_val = 0; | |
14650 | ||
4fae6e18 JK |
14651 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
14652 | omitting DW_AT_lower_bound. */ | |
14653 | switch (cu->language) | |
6e70227d | 14654 | { |
4fae6e18 JK |
14655 | case language_c: |
14656 | case language_cplus: | |
729efb13 | 14657 | low.data.const_val = 0; |
4fae6e18 JK |
14658 | low_default_is_valid = 1; |
14659 | break; | |
14660 | case language_fortran: | |
729efb13 | 14661 | low.data.const_val = 1; |
4fae6e18 JK |
14662 | low_default_is_valid = 1; |
14663 | break; | |
14664 | case language_d: | |
14665 | case language_java: | |
14666 | case language_objc: | |
729efb13 | 14667 | low.data.const_val = 0; |
4fae6e18 JK |
14668 | low_default_is_valid = (cu->header.version >= 4); |
14669 | break; | |
14670 | case language_ada: | |
14671 | case language_m2: | |
14672 | case language_pascal: | |
729efb13 | 14673 | low.data.const_val = 1; |
4fae6e18 JK |
14674 | low_default_is_valid = (cu->header.version >= 4); |
14675 | break; | |
14676 | default: | |
729efb13 | 14677 | low.data.const_val = 0; |
4fae6e18 JK |
14678 | low_default_is_valid = 0; |
14679 | break; | |
a02abb62 JB |
14680 | } |
14681 | ||
e142c38c | 14682 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 14683 | if (attr) |
11c1ba78 | 14684 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
14685 | else if (!low_default_is_valid) |
14686 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
14687 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14688 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 14689 | |
e142c38c | 14690 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 14691 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
14692 | { |
14693 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 14694 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 14695 | { |
c451ebe5 SA |
14696 | /* If bounds are constant do the final calculation here. */ |
14697 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
14698 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
14699 | else | |
14700 | high_bound_is_count = 1; | |
c2ff108b | 14701 | } |
e77813c8 PM |
14702 | } |
14703 | ||
14704 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
14705 | without specifying a base type. | |
14706 | In that case, the base type must be set to the type of | |
14707 | the lower bound, upper bound or count, in that order, if any of these | |
14708 | three attributes references an object that has a type. | |
14709 | If no base type is found, the Dwarf-2 specifications say that | |
14710 | a signed integer type of size equal to the size of an address should | |
14711 | be used. | |
14712 | For the following C code: `extern char gdb_int [];' | |
14713 | GCC produces an empty range DIE. | |
14714 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 14715 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
14716 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
14717 | { | |
14718 | struct objfile *objfile = cu->objfile; | |
14719 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
14720 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
14721 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
14722 | ||
14723 | /* Test "int", "long int", and "long long int" objfile types, | |
14724 | and select the first one having a size above or equal to the | |
14725 | architecture address size. */ | |
14726 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14727 | base_type = int_type; | |
14728 | else | |
14729 | { | |
14730 | int_type = objfile_type (objfile)->builtin_long; | |
14731 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14732 | base_type = int_type; | |
14733 | else | |
14734 | { | |
14735 | int_type = objfile_type (objfile)->builtin_long_long; | |
14736 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14737 | base_type = int_type; | |
14738 | } | |
14739 | } | |
14740 | } | |
a02abb62 | 14741 | |
dbb9c2b1 JB |
14742 | /* Normally, the DWARF producers are expected to use a signed |
14743 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
14744 | But this is unfortunately not always the case, as witnessed | |
14745 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
14746 | is used instead. To work around that ambiguity, we treat | |
14747 | the bounds as signed, and thus sign-extend their values, when | |
14748 | the base type is signed. */ | |
6e70227d | 14749 | negative_mask = |
43bbcdc2 | 14750 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
729efb13 SA |
14751 | if (low.kind == PROP_CONST |
14752 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
14753 | low.data.const_val |= negative_mask; | |
14754 | if (high.kind == PROP_CONST | |
14755 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
14756 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 14757 | |
729efb13 | 14758 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 14759 | |
c451ebe5 SA |
14760 | if (high_bound_is_count) |
14761 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
14762 | ||
c2ff108b JK |
14763 | /* Ada expects an empty array on no boundary attributes. */ |
14764 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 14765 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 14766 | |
39cbfefa DJ |
14767 | name = dwarf2_name (die, cu); |
14768 | if (name) | |
14769 | TYPE_NAME (range_type) = name; | |
6e70227d | 14770 | |
e142c38c | 14771 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
14772 | if (attr) |
14773 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
14774 | ||
7e314c57 JK |
14775 | set_die_type (die, range_type, cu); |
14776 | ||
14777 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14778 | set_descriptive_type (range_type, die, cu); |
14779 | ||
7e314c57 | 14780 | return range_type; |
a02abb62 | 14781 | } |
6e70227d | 14782 | |
f792889a | 14783 | static struct type * |
81a17f79 JB |
14784 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
14785 | { | |
14786 | struct type *type; | |
81a17f79 | 14787 | |
81a17f79 JB |
14788 | /* For now, we only support the C meaning of an unspecified type: void. */ |
14789 | ||
0114d602 DJ |
14790 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
14791 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 14792 | |
f792889a | 14793 | return set_die_type (die, type, cu); |
81a17f79 | 14794 | } |
a02abb62 | 14795 | |
639d11d3 DC |
14796 | /* Read a single die and all its descendents. Set the die's sibling |
14797 | field to NULL; set other fields in the die correctly, and set all | |
14798 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
14799 | location of the info_ptr after reading all of those dies. PARENT | |
14800 | is the parent of the die in question. */ | |
14801 | ||
14802 | static struct die_info * | |
dee91e82 | 14803 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
14804 | const gdb_byte *info_ptr, |
14805 | const gdb_byte **new_info_ptr, | |
dee91e82 | 14806 | struct die_info *parent) |
639d11d3 DC |
14807 | { |
14808 | struct die_info *die; | |
d521ce57 | 14809 | const gdb_byte *cur_ptr; |
639d11d3 DC |
14810 | int has_children; |
14811 | ||
bf6af496 | 14812 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
14813 | if (die == NULL) |
14814 | { | |
14815 | *new_info_ptr = cur_ptr; | |
14816 | return NULL; | |
14817 | } | |
93311388 | 14818 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
14819 | |
14820 | if (has_children) | |
bf6af496 | 14821 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
14822 | else |
14823 | { | |
14824 | die->child = NULL; | |
14825 | *new_info_ptr = cur_ptr; | |
14826 | } | |
14827 | ||
14828 | die->sibling = NULL; | |
14829 | die->parent = parent; | |
14830 | return die; | |
14831 | } | |
14832 | ||
14833 | /* Read a die, all of its descendents, and all of its siblings; set | |
14834 | all of the fields of all of the dies correctly. Arguments are as | |
14835 | in read_die_and_children. */ | |
14836 | ||
14837 | static struct die_info * | |
bf6af496 | 14838 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
14839 | const gdb_byte *info_ptr, |
14840 | const gdb_byte **new_info_ptr, | |
bf6af496 | 14841 | struct die_info *parent) |
639d11d3 DC |
14842 | { |
14843 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 14844 | const gdb_byte *cur_ptr; |
639d11d3 | 14845 | |
c906108c | 14846 | cur_ptr = info_ptr; |
639d11d3 DC |
14847 | first_die = last_sibling = NULL; |
14848 | ||
14849 | while (1) | |
c906108c | 14850 | { |
639d11d3 | 14851 | struct die_info *die |
dee91e82 | 14852 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 14853 | |
1d325ec1 | 14854 | if (die == NULL) |
c906108c | 14855 | { |
639d11d3 DC |
14856 | *new_info_ptr = cur_ptr; |
14857 | return first_die; | |
c906108c | 14858 | } |
1d325ec1 DJ |
14859 | |
14860 | if (!first_die) | |
14861 | first_die = die; | |
c906108c | 14862 | else |
1d325ec1 DJ |
14863 | last_sibling->sibling = die; |
14864 | ||
14865 | last_sibling = die; | |
c906108c | 14866 | } |
c906108c SS |
14867 | } |
14868 | ||
bf6af496 DE |
14869 | /* Read a die, all of its descendents, and all of its siblings; set |
14870 | all of the fields of all of the dies correctly. Arguments are as | |
14871 | in read_die_and_children. | |
14872 | This the main entry point for reading a DIE and all its children. */ | |
14873 | ||
14874 | static struct die_info * | |
14875 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
14876 | const gdb_byte *info_ptr, |
14877 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
14878 | struct die_info *parent) |
14879 | { | |
14880 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
14881 | new_info_ptr, parent); | |
14882 | ||
14883 | if (dwarf2_die_debug) | |
14884 | { | |
14885 | fprintf_unfiltered (gdb_stdlog, | |
14886 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 14887 | get_section_name (reader->die_section), |
bf6af496 DE |
14888 | (unsigned) (info_ptr - reader->die_section->buffer), |
14889 | bfd_get_filename (reader->abfd)); | |
14890 | dump_die (die, dwarf2_die_debug); | |
14891 | } | |
14892 | ||
14893 | return die; | |
14894 | } | |
14895 | ||
3019eac3 DE |
14896 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
14897 | attributes. | |
14898 | The caller is responsible for filling in the extra attributes | |
14899 | and updating (*DIEP)->num_attrs. | |
14900 | Set DIEP to point to a newly allocated die with its information, | |
14901 | except for its child, sibling, and parent fields. | |
14902 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 14903 | |
d521ce57 | 14904 | static const gdb_byte * |
3019eac3 | 14905 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 14906 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 14907 | int *has_children, int num_extra_attrs) |
93311388 | 14908 | { |
b64f50a1 JK |
14909 | unsigned int abbrev_number, bytes_read, i; |
14910 | sect_offset offset; | |
93311388 DE |
14911 | struct abbrev_info *abbrev; |
14912 | struct die_info *die; | |
14913 | struct dwarf2_cu *cu = reader->cu; | |
14914 | bfd *abfd = reader->abfd; | |
14915 | ||
b64f50a1 | 14916 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
14917 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14918 | info_ptr += bytes_read; | |
14919 | if (!abbrev_number) | |
14920 | { | |
14921 | *diep = NULL; | |
14922 | *has_children = 0; | |
14923 | return info_ptr; | |
14924 | } | |
14925 | ||
433df2d4 | 14926 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 14927 | if (!abbrev) |
348e048f DE |
14928 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
14929 | abbrev_number, | |
14930 | bfd_get_filename (abfd)); | |
14931 | ||
3019eac3 | 14932 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
14933 | die->offset = offset; |
14934 | die->tag = abbrev->tag; | |
14935 | die->abbrev = abbrev_number; | |
14936 | ||
3019eac3 DE |
14937 | /* Make the result usable. |
14938 | The caller needs to update num_attrs after adding the extra | |
14939 | attributes. */ | |
93311388 DE |
14940 | die->num_attrs = abbrev->num_attrs; |
14941 | ||
14942 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
14943 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
14944 | info_ptr); | |
93311388 DE |
14945 | |
14946 | *diep = die; | |
14947 | *has_children = abbrev->has_children; | |
14948 | return info_ptr; | |
14949 | } | |
14950 | ||
3019eac3 DE |
14951 | /* Read a die and all its attributes. |
14952 | Set DIEP to point to a newly allocated die with its information, | |
14953 | except for its child, sibling, and parent fields. | |
14954 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
14955 | ||
d521ce57 | 14956 | static const gdb_byte * |
3019eac3 | 14957 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 14958 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
14959 | int *has_children) |
14960 | { | |
d521ce57 | 14961 | const gdb_byte *result; |
bf6af496 DE |
14962 | |
14963 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
14964 | ||
14965 | if (dwarf2_die_debug) | |
14966 | { | |
14967 | fprintf_unfiltered (gdb_stdlog, | |
14968 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 14969 | get_section_name (reader->die_section), |
bf6af496 DE |
14970 | (unsigned) (info_ptr - reader->die_section->buffer), |
14971 | bfd_get_filename (reader->abfd)); | |
14972 | dump_die (*diep, dwarf2_die_debug); | |
14973 | } | |
14974 | ||
14975 | return result; | |
3019eac3 | 14976 | } |
433df2d4 DE |
14977 | \f |
14978 | /* Abbreviation tables. | |
3019eac3 | 14979 | |
433df2d4 | 14980 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
14981 | stored in a separate .debug_abbrev section. Before we read any |
14982 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
14983 | in a hash table. */ |
14984 | ||
14985 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
14986 | ||
14987 | static struct abbrev_info * | |
14988 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
14989 | { | |
14990 | struct abbrev_info *abbrev; | |
14991 | ||
14992 | abbrev = (struct abbrev_info *) | |
14993 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
14994 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
14995 | return abbrev; | |
14996 | } | |
14997 | ||
14998 | /* Add an abbreviation to the table. */ | |
c906108c SS |
14999 | |
15000 | static void | |
433df2d4 DE |
15001 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15002 | unsigned int abbrev_number, | |
15003 | struct abbrev_info *abbrev) | |
15004 | { | |
15005 | unsigned int hash_number; | |
15006 | ||
15007 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15008 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15009 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15010 | } | |
dee91e82 | 15011 | |
433df2d4 DE |
15012 | /* Look up an abbrev in the table. |
15013 | Returns NULL if the abbrev is not found. */ | |
15014 | ||
15015 | static struct abbrev_info * | |
15016 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15017 | unsigned int abbrev_number) | |
c906108c | 15018 | { |
433df2d4 DE |
15019 | unsigned int hash_number; |
15020 | struct abbrev_info *abbrev; | |
15021 | ||
15022 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15023 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15024 | ||
15025 | while (abbrev) | |
15026 | { | |
15027 | if (abbrev->number == abbrev_number) | |
15028 | return abbrev; | |
15029 | abbrev = abbrev->next; | |
15030 | } | |
15031 | return NULL; | |
15032 | } | |
15033 | ||
15034 | /* Read in an abbrev table. */ | |
15035 | ||
15036 | static struct abbrev_table * | |
15037 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
15038 | sect_offset offset) | |
15039 | { | |
15040 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15041 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15042 | struct abbrev_table *abbrev_table; |
d521ce57 | 15043 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15044 | struct abbrev_info *cur_abbrev; |
15045 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15046 | unsigned int abbrev_form; |
f3dd6933 DJ |
15047 | struct attr_abbrev *cur_attrs; |
15048 | unsigned int allocated_attrs; | |
c906108c | 15049 | |
70ba0933 | 15050 | abbrev_table = XNEW (struct abbrev_table); |
f4dc4d17 | 15051 | abbrev_table->offset = offset; |
433df2d4 DE |
15052 | obstack_init (&abbrev_table->abbrev_obstack); |
15053 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
15054 | (ABBREV_HASH_SIZE | |
15055 | * sizeof (struct abbrev_info *))); | |
15056 | memset (abbrev_table->abbrevs, 0, | |
15057 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15058 | |
433df2d4 DE |
15059 | dwarf2_read_section (objfile, section); |
15060 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
15061 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15062 | abbrev_ptr += bytes_read; | |
15063 | ||
f3dd6933 DJ |
15064 | allocated_attrs = ATTR_ALLOC_CHUNK; |
15065 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 15066 | |
0963b4bd | 15067 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15068 | while (abbrev_number) |
15069 | { | |
433df2d4 | 15070 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15071 | |
15072 | /* read in abbrev header */ | |
15073 | cur_abbrev->number = abbrev_number; | |
15074 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15075 | abbrev_ptr += bytes_read; | |
15076 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15077 | abbrev_ptr += 1; | |
15078 | ||
15079 | /* now read in declarations */ | |
15080 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15081 | abbrev_ptr += bytes_read; | |
15082 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15083 | abbrev_ptr += bytes_read; | |
15084 | while (abbrev_name) | |
15085 | { | |
f3dd6933 | 15086 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15087 | { |
f3dd6933 DJ |
15088 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15089 | cur_attrs | |
15090 | = xrealloc (cur_attrs, (allocated_attrs | |
15091 | * sizeof (struct attr_abbrev))); | |
c906108c | 15092 | } |
ae038cb0 | 15093 | |
f3dd6933 DJ |
15094 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
15095 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
15096 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15097 | abbrev_ptr += bytes_read; | |
15098 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15099 | abbrev_ptr += bytes_read; | |
15100 | } | |
15101 | ||
433df2d4 | 15102 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
15103 | (cur_abbrev->num_attrs |
15104 | * sizeof (struct attr_abbrev))); | |
15105 | memcpy (cur_abbrev->attrs, cur_attrs, | |
15106 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15107 | ||
433df2d4 | 15108 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15109 | |
15110 | /* Get next abbreviation. | |
15111 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15112 | always properly terminated with an abbrev number of 0. |
15113 | Exit loop if we encounter an abbreviation which we have | |
15114 | already read (which means we are about to read the abbreviations | |
15115 | for the next compile unit) or if the end of the abbreviation | |
15116 | table is reached. */ | |
433df2d4 | 15117 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15118 | break; |
15119 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15120 | abbrev_ptr += bytes_read; | |
433df2d4 | 15121 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15122 | break; |
15123 | } | |
f3dd6933 DJ |
15124 | |
15125 | xfree (cur_attrs); | |
433df2d4 | 15126 | return abbrev_table; |
c906108c SS |
15127 | } |
15128 | ||
433df2d4 | 15129 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15130 | |
c906108c | 15131 | static void |
433df2d4 | 15132 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15133 | { |
433df2d4 DE |
15134 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15135 | xfree (abbrev_table); | |
c906108c SS |
15136 | } |
15137 | ||
f4dc4d17 DE |
15138 | /* Same as abbrev_table_free but as a cleanup. |
15139 | We pass in a pointer to the pointer to the table so that we can | |
15140 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15141 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15142 | |
15143 | static void | |
15144 | abbrev_table_free_cleanup (void *table_ptr) | |
15145 | { | |
15146 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
15147 | ||
15148 | if (*abbrev_table_ptr != NULL) | |
15149 | abbrev_table_free (*abbrev_table_ptr); | |
15150 | *abbrev_table_ptr = NULL; | |
15151 | } | |
15152 | ||
433df2d4 DE |
15153 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15154 | ||
15155 | static void | |
15156 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15157 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15158 | { |
433df2d4 DE |
15159 | cu->abbrev_table = |
15160 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
15161 | } | |
c906108c | 15162 | |
433df2d4 | 15163 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15164 | |
433df2d4 DE |
15165 | static void |
15166 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15167 | { | |
15168 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 15169 | |
a2ce51a0 DE |
15170 | if (cu->abbrev_table != NULL) |
15171 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15172 | /* Set this to NULL so that we SEGV if we try to read it later, |
15173 | and also because free_comp_unit verifies this is NULL. */ | |
15174 | cu->abbrev_table = NULL; | |
15175 | } | |
15176 | \f | |
72bf9492 DJ |
15177 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15178 | symbol for. */ | |
15179 | ||
15180 | static int | |
15181 | is_type_tag_for_partial (int tag) | |
15182 | { | |
15183 | switch (tag) | |
15184 | { | |
15185 | #if 0 | |
15186 | /* Some types that would be reasonable to generate partial symbols for, | |
15187 | that we don't at present. */ | |
15188 | case DW_TAG_array_type: | |
15189 | case DW_TAG_file_type: | |
15190 | case DW_TAG_ptr_to_member_type: | |
15191 | case DW_TAG_set_type: | |
15192 | case DW_TAG_string_type: | |
15193 | case DW_TAG_subroutine_type: | |
15194 | #endif | |
15195 | case DW_TAG_base_type: | |
15196 | case DW_TAG_class_type: | |
680b30c7 | 15197 | case DW_TAG_interface_type: |
72bf9492 DJ |
15198 | case DW_TAG_enumeration_type: |
15199 | case DW_TAG_structure_type: | |
15200 | case DW_TAG_subrange_type: | |
15201 | case DW_TAG_typedef: | |
15202 | case DW_TAG_union_type: | |
15203 | return 1; | |
15204 | default: | |
15205 | return 0; | |
15206 | } | |
15207 | } | |
15208 | ||
15209 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15210 | ||
15211 | static struct partial_die_info * | |
dee91e82 | 15212 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15213 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15214 | { |
dee91e82 | 15215 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15216 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15217 | struct partial_die_info *part_die; |
15218 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15219 | struct abbrev_info *abbrev; | |
15220 | unsigned int bytes_read; | |
5afb4e99 | 15221 | unsigned int load_all = 0; |
72bf9492 DJ |
15222 | int nesting_level = 1; |
15223 | ||
15224 | parent_die = NULL; | |
15225 | last_die = NULL; | |
15226 | ||
7adf1e79 DE |
15227 | gdb_assert (cu->per_cu != NULL); |
15228 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
15229 | load_all = 1; |
15230 | ||
72bf9492 DJ |
15231 | cu->partial_dies |
15232 | = htab_create_alloc_ex (cu->header.length / 12, | |
15233 | partial_die_hash, | |
15234 | partial_die_eq, | |
15235 | NULL, | |
15236 | &cu->comp_unit_obstack, | |
15237 | hashtab_obstack_allocate, | |
15238 | dummy_obstack_deallocate); | |
15239 | ||
15240 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
15241 | sizeof (struct partial_die_info)); | |
15242 | ||
15243 | while (1) | |
15244 | { | |
15245 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
15246 | ||
15247 | /* A NULL abbrev means the end of a series of children. */ | |
15248 | if (abbrev == NULL) | |
15249 | { | |
15250 | if (--nesting_level == 0) | |
15251 | { | |
15252 | /* PART_DIE was probably the last thing allocated on the | |
15253 | comp_unit_obstack, so we could call obstack_free | |
15254 | here. We don't do that because the waste is small, | |
15255 | and will be cleaned up when we're done with this | |
15256 | compilation unit. This way, we're also more robust | |
15257 | against other users of the comp_unit_obstack. */ | |
15258 | return first_die; | |
15259 | } | |
15260 | info_ptr += bytes_read; | |
15261 | last_die = parent_die; | |
15262 | parent_die = parent_die->die_parent; | |
15263 | continue; | |
15264 | } | |
15265 | ||
98bfdba5 PA |
15266 | /* Check for template arguments. We never save these; if |
15267 | they're seen, we just mark the parent, and go on our way. */ | |
15268 | if (parent_die != NULL | |
15269 | && cu->language == language_cplus | |
15270 | && (abbrev->tag == DW_TAG_template_type_param | |
15271 | || abbrev->tag == DW_TAG_template_value_param)) | |
15272 | { | |
15273 | parent_die->has_template_arguments = 1; | |
15274 | ||
15275 | if (!load_all) | |
15276 | { | |
15277 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 15278 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15279 | continue; |
15280 | } | |
15281 | } | |
15282 | ||
0d99eb77 | 15283 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
15284 | Skip their other children. */ |
15285 | if (!load_all | |
15286 | && cu->language == language_cplus | |
15287 | && parent_die != NULL | |
15288 | && parent_die->tag == DW_TAG_subprogram) | |
15289 | { | |
dee91e82 | 15290 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15291 | continue; |
15292 | } | |
15293 | ||
5afb4e99 DJ |
15294 | /* Check whether this DIE is interesting enough to save. Normally |
15295 | we would not be interested in members here, but there may be | |
15296 | later variables referencing them via DW_AT_specification (for | |
15297 | static members). */ | |
15298 | if (!load_all | |
15299 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 15300 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
15301 | && abbrev->tag != DW_TAG_enumerator |
15302 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 15303 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 15304 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 15305 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 15306 | && abbrev->tag != DW_TAG_module |
95554aad | 15307 | && abbrev->tag != DW_TAG_member |
74921315 KS |
15308 | && abbrev->tag != DW_TAG_imported_unit |
15309 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
15310 | { |
15311 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15312 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
15313 | continue; |
15314 | } | |
15315 | ||
dee91e82 DE |
15316 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
15317 | info_ptr); | |
72bf9492 DJ |
15318 | |
15319 | /* This two-pass algorithm for processing partial symbols has a | |
15320 | high cost in cache pressure. Thus, handle some simple cases | |
15321 | here which cover the majority of C partial symbols. DIEs | |
15322 | which neither have specification tags in them, nor could have | |
15323 | specification tags elsewhere pointing at them, can simply be | |
15324 | processed and discarded. | |
15325 | ||
15326 | This segment is also optional; scan_partial_symbols and | |
15327 | add_partial_symbol will handle these DIEs if we chain | |
15328 | them in normally. When compilers which do not emit large | |
15329 | quantities of duplicate debug information are more common, | |
15330 | this code can probably be removed. */ | |
15331 | ||
15332 | /* Any complete simple types at the top level (pretty much all | |
15333 | of them, for a language without namespaces), can be processed | |
15334 | directly. */ | |
15335 | if (parent_die == NULL | |
15336 | && part_die->has_specification == 0 | |
15337 | && part_die->is_declaration == 0 | |
d8228535 | 15338 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
15339 | || part_die->tag == DW_TAG_base_type |
15340 | || part_die->tag == DW_TAG_subrange_type)) | |
15341 | { | |
15342 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 15343 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15344 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
15345 | &objfile->static_psymbols, |
15346 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 15347 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15348 | continue; |
15349 | } | |
15350 | ||
d8228535 JK |
15351 | /* The exception for DW_TAG_typedef with has_children above is |
15352 | a workaround of GCC PR debug/47510. In the case of this complaint | |
15353 | type_name_no_tag_or_error will error on such types later. | |
15354 | ||
15355 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
15356 | it could not find the child DIEs referenced later, this is checked | |
15357 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
15358 | ||
15359 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
15360 | complaint (&symfile_complaints, | |
15361 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
15362 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15363 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 15364 | |
72bf9492 DJ |
15365 | /* If we're at the second level, and we're an enumerator, and |
15366 | our parent has no specification (meaning possibly lives in a | |
15367 | namespace elsewhere), then we can add the partial symbol now | |
15368 | instead of queueing it. */ | |
15369 | if (part_die->tag == DW_TAG_enumerator | |
15370 | && parent_die != NULL | |
15371 | && parent_die->die_parent == NULL | |
15372 | && parent_die->tag == DW_TAG_enumeration_type | |
15373 | && parent_die->has_specification == 0) | |
15374 | { | |
15375 | if (part_die->name == NULL) | |
3e43a32a MS |
15376 | complaint (&symfile_complaints, |
15377 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 15378 | else if (building_psymtab) |
04a679b8 | 15379 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15380 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
15381 | (cu->language == language_cplus |
15382 | || cu->language == language_java) | |
bb5ed363 DE |
15383 | ? &objfile->global_psymbols |
15384 | : &objfile->static_psymbols, | |
15385 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 15386 | |
dee91e82 | 15387 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15388 | continue; |
15389 | } | |
15390 | ||
15391 | /* We'll save this DIE so link it in. */ | |
15392 | part_die->die_parent = parent_die; | |
15393 | part_die->die_sibling = NULL; | |
15394 | part_die->die_child = NULL; | |
15395 | ||
15396 | if (last_die && last_die == parent_die) | |
15397 | last_die->die_child = part_die; | |
15398 | else if (last_die) | |
15399 | last_die->die_sibling = part_die; | |
15400 | ||
15401 | last_die = part_die; | |
15402 | ||
15403 | if (first_die == NULL) | |
15404 | first_die = part_die; | |
15405 | ||
15406 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
15407 | find interesting need to be in the hash table, because we | |
15408 | also have the parent/sibling/child chains; only those that we | |
15409 | might refer to by offset later during partial symbol reading. | |
15410 | ||
15411 | For now this means things that might have be the target of a | |
15412 | DW_AT_specification, DW_AT_abstract_origin, or | |
15413 | DW_AT_extension. DW_AT_extension will refer only to | |
15414 | namespaces; DW_AT_abstract_origin refers to functions (and | |
15415 | many things under the function DIE, but we do not recurse | |
15416 | into function DIEs during partial symbol reading) and | |
15417 | possibly variables as well; DW_AT_specification refers to | |
15418 | declarations. Declarations ought to have the DW_AT_declaration | |
15419 | flag. It happens that GCC forgets to put it in sometimes, but | |
15420 | only for functions, not for types. | |
15421 | ||
15422 | Adding more things than necessary to the hash table is harmless | |
15423 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
15424 | wasted time in find_partial_die, when we reread the compilation |
15425 | unit with load_all_dies set. */ | |
72bf9492 | 15426 | |
5afb4e99 | 15427 | if (load_all |
72929c62 | 15428 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 15429 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
15430 | || abbrev->tag == DW_TAG_variable |
15431 | || abbrev->tag == DW_TAG_namespace | |
15432 | || part_die->is_declaration) | |
15433 | { | |
15434 | void **slot; | |
15435 | ||
15436 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 15437 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
15438 | *slot = part_die; |
15439 | } | |
15440 | ||
15441 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
15442 | sizeof (struct partial_die_info)); | |
15443 | ||
15444 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 15445 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
15446 | languages we have to, so that we can get at method physnames |
15447 | to infer fully qualified class names, for DW_AT_specification, | |
15448 | and for C++ template arguments. For C++, we also look one level | |
15449 | inside functions to find template arguments (if the name of the | |
15450 | function does not already contain the template arguments). | |
bc30ff58 JB |
15451 | |
15452 | For Ada, we need to scan the children of subprograms and lexical | |
15453 | blocks as well because Ada allows the definition of nested | |
15454 | entities that could be interesting for the debugger, such as | |
15455 | nested subprograms for instance. */ | |
72bf9492 | 15456 | if (last_die->has_children |
5afb4e99 DJ |
15457 | && (load_all |
15458 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 15459 | || last_die->tag == DW_TAG_module |
72bf9492 | 15460 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
15461 | || (cu->language == language_cplus |
15462 | && last_die->tag == DW_TAG_subprogram | |
15463 | && (last_die->name == NULL | |
15464 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
15465 | || (cu->language != language_c |
15466 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 15467 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 15468 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
15469 | || last_die->tag == DW_TAG_union_type)) |
15470 | || (cu->language == language_ada | |
15471 | && (last_die->tag == DW_TAG_subprogram | |
15472 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
15473 | { |
15474 | nesting_level++; | |
15475 | parent_die = last_die; | |
15476 | continue; | |
15477 | } | |
15478 | ||
15479 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15480 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
15481 | |
15482 | /* Back to the top, do it again. */ | |
15483 | } | |
15484 | } | |
15485 | ||
c906108c SS |
15486 | /* Read a minimal amount of information into the minimal die structure. */ |
15487 | ||
d521ce57 | 15488 | static const gdb_byte * |
dee91e82 DE |
15489 | read_partial_die (const struct die_reader_specs *reader, |
15490 | struct partial_die_info *part_die, | |
15491 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 15492 | const gdb_byte *info_ptr) |
c906108c | 15493 | { |
dee91e82 | 15494 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15495 | struct objfile *objfile = cu->objfile; |
d521ce57 | 15496 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 15497 | unsigned int i; |
c906108c | 15498 | struct attribute attr; |
c5aa993b | 15499 | int has_low_pc_attr = 0; |
c906108c | 15500 | int has_high_pc_attr = 0; |
91da1414 | 15501 | int high_pc_relative = 0; |
c906108c | 15502 | |
72bf9492 | 15503 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 15504 | |
b64f50a1 | 15505 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
15506 | |
15507 | info_ptr += abbrev_len; | |
15508 | ||
15509 | if (abbrev == NULL) | |
15510 | return info_ptr; | |
15511 | ||
c906108c SS |
15512 | part_die->tag = abbrev->tag; |
15513 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
15514 | |
15515 | for (i = 0; i < abbrev->num_attrs; ++i) | |
15516 | { | |
dee91e82 | 15517 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
15518 | |
15519 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 15520 | partial symbol table. */ |
c906108c SS |
15521 | switch (attr.name) |
15522 | { | |
15523 | case DW_AT_name: | |
71c25dea TT |
15524 | switch (part_die->tag) |
15525 | { | |
15526 | case DW_TAG_compile_unit: | |
95554aad | 15527 | case DW_TAG_partial_unit: |
348e048f | 15528 | case DW_TAG_type_unit: |
71c25dea TT |
15529 | /* Compilation units have a DW_AT_name that is a filename, not |
15530 | a source language identifier. */ | |
15531 | case DW_TAG_enumeration_type: | |
15532 | case DW_TAG_enumerator: | |
15533 | /* These tags always have simple identifiers already; no need | |
15534 | to canonicalize them. */ | |
15535 | part_die->name = DW_STRING (&attr); | |
15536 | break; | |
15537 | default: | |
15538 | part_die->name | |
15539 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 15540 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
15541 | break; |
15542 | } | |
c906108c | 15543 | break; |
31ef98ae | 15544 | case DW_AT_linkage_name: |
c906108c | 15545 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
15546 | /* Note that both forms of linkage name might appear. We |
15547 | assume they will be the same, and we only store the last | |
15548 | one we see. */ | |
94af9270 KS |
15549 | if (cu->language == language_ada) |
15550 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 15551 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
15552 | break; |
15553 | case DW_AT_low_pc: | |
15554 | has_low_pc_attr = 1; | |
31aa7e4e | 15555 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
15556 | break; |
15557 | case DW_AT_high_pc: | |
15558 | has_high_pc_attr = 1; | |
31aa7e4e JB |
15559 | part_die->highpc = attr_value_as_address (&attr); |
15560 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
15561 | high_pc_relative = 1; | |
c906108c SS |
15562 | break; |
15563 | case DW_AT_location: | |
0963b4bd | 15564 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
15565 | if (attr_form_is_block (&attr)) |
15566 | { | |
95554aad | 15567 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 15568 | } |
3690dd37 | 15569 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 15570 | { |
4d3c2250 | 15571 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15572 | } |
15573 | else | |
15574 | { | |
4d3c2250 KB |
15575 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
15576 | "partial symbol information"); | |
8e19ed76 | 15577 | } |
c906108c | 15578 | break; |
c906108c SS |
15579 | case DW_AT_external: |
15580 | part_die->is_external = DW_UNSND (&attr); | |
15581 | break; | |
15582 | case DW_AT_declaration: | |
15583 | part_die->is_declaration = DW_UNSND (&attr); | |
15584 | break; | |
15585 | case DW_AT_type: | |
15586 | part_die->has_type = 1; | |
15587 | break; | |
15588 | case DW_AT_abstract_origin: | |
15589 | case DW_AT_specification: | |
72bf9492 DJ |
15590 | case DW_AT_extension: |
15591 | part_die->has_specification = 1; | |
c764a876 | 15592 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
15593 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
15594 | || cu->per_cu->is_dwz); | |
c906108c SS |
15595 | break; |
15596 | case DW_AT_sibling: | |
15597 | /* Ignore absolute siblings, they might point outside of | |
15598 | the current compile unit. */ | |
15599 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
15600 | complaint (&symfile_complaints, |
15601 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 15602 | else |
b9502d3f WN |
15603 | { |
15604 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
15605 | const gdb_byte *sibling_ptr = buffer + off; | |
15606 | ||
15607 | if (sibling_ptr < info_ptr) | |
15608 | complaint (&symfile_complaints, | |
15609 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
15610 | else if (sibling_ptr > reader->buffer_end) |
15611 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
15612 | else |
15613 | part_die->sibling = sibling_ptr; | |
15614 | } | |
c906108c | 15615 | break; |
fa4028e9 JB |
15616 | case DW_AT_byte_size: |
15617 | part_die->has_byte_size = 1; | |
15618 | break; | |
68511cec CES |
15619 | case DW_AT_calling_convention: |
15620 | /* DWARF doesn't provide a way to identify a program's source-level | |
15621 | entry point. DW_AT_calling_convention attributes are only meant | |
15622 | to describe functions' calling conventions. | |
15623 | ||
15624 | However, because it's a necessary piece of information in | |
15625 | Fortran, and because DW_CC_program is the only piece of debugging | |
15626 | information whose definition refers to a 'main program' at all, | |
15627 | several compilers have begun marking Fortran main programs with | |
15628 | DW_CC_program --- even when those functions use the standard | |
15629 | calling conventions. | |
15630 | ||
15631 | So until DWARF specifies a way to provide this information and | |
15632 | compilers pick up the new representation, we'll support this | |
15633 | practice. */ | |
15634 | if (DW_UNSND (&attr) == DW_CC_program | |
15635 | && cu->language == language_fortran) | |
3d548a53 | 15636 | set_objfile_main_name (objfile, part_die->name, language_fortran); |
68511cec | 15637 | break; |
481860b3 GB |
15638 | case DW_AT_inline: |
15639 | if (DW_UNSND (&attr) == DW_INL_inlined | |
15640 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
15641 | part_die->may_be_inlined = 1; | |
15642 | break; | |
95554aad TT |
15643 | |
15644 | case DW_AT_import: | |
15645 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
15646 | { |
15647 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
15648 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
15649 | || cu->per_cu->is_dwz); | |
15650 | } | |
95554aad TT |
15651 | break; |
15652 | ||
c906108c SS |
15653 | default: |
15654 | break; | |
15655 | } | |
15656 | } | |
15657 | ||
91da1414 MW |
15658 | if (high_pc_relative) |
15659 | part_die->highpc += part_die->lowpc; | |
15660 | ||
9373cf26 JK |
15661 | if (has_low_pc_attr && has_high_pc_attr) |
15662 | { | |
15663 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
15664 | eliminate duplicate copies of functions and vtables and such. | |
15665 | The linker will arbitrarily choose one and discard the others. | |
15666 | The AT_*_pc values for such functions refer to local labels in | |
15667 | these sections. If the section from that file was discarded, the | |
15668 | labels are not in the output, so the relocs get a value of 0. | |
15669 | If this is a discarded function, mark the pc bounds as invalid, | |
15670 | so that GDB will ignore it. */ | |
15671 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15672 | { | |
bb5ed363 | 15673 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15674 | |
15675 | complaint (&symfile_complaints, | |
15676 | _("DW_AT_low_pc %s is zero " | |
15677 | "for DIE at 0x%x [in module %s]"), | |
15678 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 15679 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15680 | } |
15681 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
15682 | else if (part_die->lowpc >= part_die->highpc) | |
15683 | { | |
bb5ed363 | 15684 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15685 | |
15686 | complaint (&symfile_complaints, | |
15687 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
15688 | "for DIE at 0x%x [in module %s]"), | |
15689 | paddress (gdbarch, part_die->lowpc), | |
15690 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 15691 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15692 | } |
15693 | else | |
15694 | part_die->has_pc_info = 1; | |
15695 | } | |
85cbf3d3 | 15696 | |
c906108c SS |
15697 | return info_ptr; |
15698 | } | |
15699 | ||
72bf9492 DJ |
15700 | /* Find a cached partial DIE at OFFSET in CU. */ |
15701 | ||
15702 | static struct partial_die_info * | |
b64f50a1 | 15703 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
15704 | { |
15705 | struct partial_die_info *lookup_die = NULL; | |
15706 | struct partial_die_info part_die; | |
15707 | ||
15708 | part_die.offset = offset; | |
b64f50a1 JK |
15709 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
15710 | offset.sect_off); | |
72bf9492 | 15711 | |
72bf9492 DJ |
15712 | return lookup_die; |
15713 | } | |
15714 | ||
348e048f DE |
15715 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
15716 | except in the case of .debug_types DIEs which do not reference | |
15717 | outside their CU (they do however referencing other types via | |
55f1336d | 15718 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
15719 | |
15720 | static struct partial_die_info * | |
36586728 | 15721 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 15722 | { |
bb5ed363 | 15723 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
15724 | struct dwarf2_per_cu_data *per_cu = NULL; |
15725 | struct partial_die_info *pd = NULL; | |
72bf9492 | 15726 | |
36586728 TT |
15727 | if (offset_in_dwz == cu->per_cu->is_dwz |
15728 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
15729 | { |
15730 | pd = find_partial_die_in_comp_unit (offset, cu); | |
15731 | if (pd != NULL) | |
15732 | return pd; | |
0d99eb77 DE |
15733 | /* We missed recording what we needed. |
15734 | Load all dies and try again. */ | |
15735 | per_cu = cu->per_cu; | |
5afb4e99 | 15736 | } |
0d99eb77 DE |
15737 | else |
15738 | { | |
15739 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 15740 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
15741 | { |
15742 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
15743 | " external reference to offset 0x%lx [in module %s].\n"), | |
15744 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
15745 | bfd_get_filename (objfile->obfd)); | |
15746 | } | |
36586728 TT |
15747 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
15748 | objfile); | |
72bf9492 | 15749 | |
0d99eb77 DE |
15750 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
15751 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 15752 | |
0d99eb77 DE |
15753 | per_cu->cu->last_used = 0; |
15754 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
15755 | } | |
5afb4e99 | 15756 | |
dee91e82 DE |
15757 | /* If we didn't find it, and not all dies have been loaded, |
15758 | load them all and try again. */ | |
15759 | ||
5afb4e99 DJ |
15760 | if (pd == NULL && per_cu->load_all_dies == 0) |
15761 | { | |
5afb4e99 | 15762 | per_cu->load_all_dies = 1; |
fd820528 DE |
15763 | |
15764 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
15765 | THIS_CU->cu may already be in use. So we can't just free it and | |
15766 | replace its DIEs with the ones we read in. Instead, we leave those | |
15767 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
15768 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
15769 | set. */ | |
dee91e82 | 15770 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
15771 | |
15772 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
15773 | } | |
15774 | ||
15775 | if (pd == NULL) | |
15776 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
15777 | _("could not find partial DIE 0x%x " |
15778 | "in cache [from module %s]\n"), | |
b64f50a1 | 15779 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 15780 | return pd; |
72bf9492 DJ |
15781 | } |
15782 | ||
abc72ce4 DE |
15783 | /* See if we can figure out if the class lives in a namespace. We do |
15784 | this by looking for a member function; its demangled name will | |
15785 | contain namespace info, if there is any. */ | |
15786 | ||
15787 | static void | |
15788 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
15789 | struct dwarf2_cu *cu) | |
15790 | { | |
15791 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
15792 | what template types look like, because the demangler | |
15793 | frequently doesn't give the same name as the debug info. We | |
15794 | could fix this by only using the demangled name to get the | |
15795 | prefix (but see comment in read_structure_type). */ | |
15796 | ||
15797 | struct partial_die_info *real_pdi; | |
15798 | struct partial_die_info *child_pdi; | |
15799 | ||
15800 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
15801 | we should not do this. We'll prepend the parent's fully qualified | |
15802 | name when we create the partial symbol. */ | |
15803 | ||
15804 | real_pdi = struct_pdi; | |
15805 | while (real_pdi->has_specification) | |
36586728 TT |
15806 | real_pdi = find_partial_die (real_pdi->spec_offset, |
15807 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
15808 | |
15809 | if (real_pdi->die_parent != NULL) | |
15810 | return; | |
15811 | ||
15812 | for (child_pdi = struct_pdi->die_child; | |
15813 | child_pdi != NULL; | |
15814 | child_pdi = child_pdi->die_sibling) | |
15815 | { | |
15816 | if (child_pdi->tag == DW_TAG_subprogram | |
15817 | && child_pdi->linkage_name != NULL) | |
15818 | { | |
15819 | char *actual_class_name | |
15820 | = language_class_name_from_physname (cu->language_defn, | |
15821 | child_pdi->linkage_name); | |
15822 | if (actual_class_name != NULL) | |
15823 | { | |
15824 | struct_pdi->name | |
34a68019 | 15825 | = obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
10f0c4bb TT |
15826 | actual_class_name, |
15827 | strlen (actual_class_name)); | |
abc72ce4 DE |
15828 | xfree (actual_class_name); |
15829 | } | |
15830 | break; | |
15831 | } | |
15832 | } | |
15833 | } | |
15834 | ||
72bf9492 DJ |
15835 | /* Adjust PART_DIE before generating a symbol for it. This function |
15836 | may set the is_external flag or change the DIE's name. */ | |
15837 | ||
15838 | static void | |
15839 | fixup_partial_die (struct partial_die_info *part_die, | |
15840 | struct dwarf2_cu *cu) | |
15841 | { | |
abc72ce4 DE |
15842 | /* Once we've fixed up a die, there's no point in doing so again. |
15843 | This also avoids a memory leak if we were to call | |
15844 | guess_partial_die_structure_name multiple times. */ | |
15845 | if (part_die->fixup_called) | |
15846 | return; | |
15847 | ||
72bf9492 DJ |
15848 | /* If we found a reference attribute and the DIE has no name, try |
15849 | to find a name in the referred to DIE. */ | |
15850 | ||
15851 | if (part_die->name == NULL && part_die->has_specification) | |
15852 | { | |
15853 | struct partial_die_info *spec_die; | |
72bf9492 | 15854 | |
36586728 TT |
15855 | spec_die = find_partial_die (part_die->spec_offset, |
15856 | part_die->spec_is_dwz, cu); | |
72bf9492 | 15857 | |
10b3939b | 15858 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
15859 | |
15860 | if (spec_die->name) | |
15861 | { | |
15862 | part_die->name = spec_die->name; | |
15863 | ||
15864 | /* Copy DW_AT_external attribute if it is set. */ | |
15865 | if (spec_die->is_external) | |
15866 | part_die->is_external = spec_die->is_external; | |
15867 | } | |
15868 | } | |
15869 | ||
15870 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
15871 | |
15872 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 15873 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 15874 | |
abc72ce4 DE |
15875 | /* If there is no parent die to provide a namespace, and there are |
15876 | children, see if we can determine the namespace from their linkage | |
122d1940 | 15877 | name. */ |
abc72ce4 | 15878 | if (cu->language == language_cplus |
8b70b953 | 15879 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
15880 | && part_die->die_parent == NULL |
15881 | && part_die->has_children | |
15882 | && (part_die->tag == DW_TAG_class_type | |
15883 | || part_die->tag == DW_TAG_structure_type | |
15884 | || part_die->tag == DW_TAG_union_type)) | |
15885 | guess_partial_die_structure_name (part_die, cu); | |
15886 | ||
53832f31 TT |
15887 | /* GCC might emit a nameless struct or union that has a linkage |
15888 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
15889 | if (part_die->name == NULL | |
96408a79 SA |
15890 | && (part_die->tag == DW_TAG_class_type |
15891 | || part_die->tag == DW_TAG_interface_type | |
15892 | || part_die->tag == DW_TAG_structure_type | |
15893 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
15894 | && part_die->linkage_name != NULL) |
15895 | { | |
15896 | char *demangled; | |
15897 | ||
8de20a37 | 15898 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
15899 | if (demangled) |
15900 | { | |
96408a79 SA |
15901 | const char *base; |
15902 | ||
15903 | /* Strip any leading namespaces/classes, keep only the base name. | |
15904 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
15905 | base = strrchr (demangled, ':'); | |
15906 | if (base && base > demangled && base[-1] == ':') | |
15907 | base++; | |
15908 | else | |
15909 | base = demangled; | |
15910 | ||
34a68019 TT |
15911 | part_die->name |
15912 | = obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
15913 | base, strlen (base)); | |
53832f31 TT |
15914 | xfree (demangled); |
15915 | } | |
15916 | } | |
15917 | ||
abc72ce4 | 15918 | part_die->fixup_called = 1; |
72bf9492 DJ |
15919 | } |
15920 | ||
a8329558 | 15921 | /* Read an attribute value described by an attribute form. */ |
c906108c | 15922 | |
d521ce57 | 15923 | static const gdb_byte * |
dee91e82 DE |
15924 | read_attribute_value (const struct die_reader_specs *reader, |
15925 | struct attribute *attr, unsigned form, | |
d521ce57 | 15926 | const gdb_byte *info_ptr) |
c906108c | 15927 | { |
dee91e82 DE |
15928 | struct dwarf2_cu *cu = reader->cu; |
15929 | bfd *abfd = reader->abfd; | |
e7c27a73 | 15930 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
15931 | unsigned int bytes_read; |
15932 | struct dwarf_block *blk; | |
15933 | ||
a8329558 KW |
15934 | attr->form = form; |
15935 | switch (form) | |
c906108c | 15936 | { |
c906108c | 15937 | case DW_FORM_ref_addr: |
ae411497 | 15938 | if (cu->header.version == 2) |
4568ecf9 | 15939 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 15940 | else |
4568ecf9 DE |
15941 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
15942 | &cu->header, &bytes_read); | |
ae411497 TT |
15943 | info_ptr += bytes_read; |
15944 | break; | |
36586728 TT |
15945 | case DW_FORM_GNU_ref_alt: |
15946 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
15947 | info_ptr += bytes_read; | |
15948 | break; | |
ae411497 | 15949 | case DW_FORM_addr: |
e7c27a73 | 15950 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 15951 | info_ptr += bytes_read; |
c906108c SS |
15952 | break; |
15953 | case DW_FORM_block2: | |
7b5a2f43 | 15954 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15955 | blk->size = read_2_bytes (abfd, info_ptr); |
15956 | info_ptr += 2; | |
15957 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15958 | info_ptr += blk->size; | |
15959 | DW_BLOCK (attr) = blk; | |
15960 | break; | |
15961 | case DW_FORM_block4: | |
7b5a2f43 | 15962 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15963 | blk->size = read_4_bytes (abfd, info_ptr); |
15964 | info_ptr += 4; | |
15965 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15966 | info_ptr += blk->size; | |
15967 | DW_BLOCK (attr) = blk; | |
15968 | break; | |
15969 | case DW_FORM_data2: | |
15970 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
15971 | info_ptr += 2; | |
15972 | break; | |
15973 | case DW_FORM_data4: | |
15974 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
15975 | info_ptr += 4; | |
15976 | break; | |
15977 | case DW_FORM_data8: | |
15978 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
15979 | info_ptr += 8; | |
15980 | break; | |
2dc7f7b3 TT |
15981 | case DW_FORM_sec_offset: |
15982 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
15983 | info_ptr += bytes_read; | |
15984 | break; | |
c906108c | 15985 | case DW_FORM_string: |
9b1c24c8 | 15986 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 15987 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
15988 | info_ptr += bytes_read; |
15989 | break; | |
4bdf3d34 | 15990 | case DW_FORM_strp: |
36586728 TT |
15991 | if (!cu->per_cu->is_dwz) |
15992 | { | |
15993 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
15994 | &bytes_read); | |
15995 | DW_STRING_IS_CANONICAL (attr) = 0; | |
15996 | info_ptr += bytes_read; | |
15997 | break; | |
15998 | } | |
15999 | /* FALLTHROUGH */ | |
16000 | case DW_FORM_GNU_strp_alt: | |
16001 | { | |
16002 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16003 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16004 | &bytes_read); | |
16005 | ||
16006 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16007 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16008 | info_ptr += bytes_read; | |
16009 | } | |
4bdf3d34 | 16010 | break; |
2dc7f7b3 | 16011 | case DW_FORM_exprloc: |
c906108c | 16012 | case DW_FORM_block: |
7b5a2f43 | 16013 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16014 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16015 | info_ptr += bytes_read; | |
16016 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16017 | info_ptr += blk->size; | |
16018 | DW_BLOCK (attr) = blk; | |
16019 | break; | |
16020 | case DW_FORM_block1: | |
7b5a2f43 | 16021 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16022 | blk->size = read_1_byte (abfd, info_ptr); |
16023 | info_ptr += 1; | |
16024 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16025 | info_ptr += blk->size; | |
16026 | DW_BLOCK (attr) = blk; | |
16027 | break; | |
16028 | case DW_FORM_data1: | |
16029 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16030 | info_ptr += 1; | |
16031 | break; | |
16032 | case DW_FORM_flag: | |
16033 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16034 | info_ptr += 1; | |
16035 | break; | |
2dc7f7b3 TT |
16036 | case DW_FORM_flag_present: |
16037 | DW_UNSND (attr) = 1; | |
16038 | break; | |
c906108c SS |
16039 | case DW_FORM_sdata: |
16040 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16041 | info_ptr += bytes_read; | |
16042 | break; | |
16043 | case DW_FORM_udata: | |
16044 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16045 | info_ptr += bytes_read; | |
16046 | break; | |
16047 | case DW_FORM_ref1: | |
4568ecf9 DE |
16048 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16049 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
16050 | info_ptr += 1; |
16051 | break; | |
16052 | case DW_FORM_ref2: | |
4568ecf9 DE |
16053 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16054 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
16055 | info_ptr += 2; |
16056 | break; | |
16057 | case DW_FORM_ref4: | |
4568ecf9 DE |
16058 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16059 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
16060 | info_ptr += 4; |
16061 | break; | |
613e1657 | 16062 | case DW_FORM_ref8: |
4568ecf9 DE |
16063 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16064 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
16065 | info_ptr += 8; |
16066 | break; | |
55f1336d | 16067 | case DW_FORM_ref_sig8: |
ac9ec31b | 16068 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16069 | info_ptr += 8; |
16070 | break; | |
c906108c | 16071 | case DW_FORM_ref_udata: |
4568ecf9 DE |
16072 | DW_UNSND (attr) = (cu->header.offset.sect_off |
16073 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
16074 | info_ptr += bytes_read; |
16075 | break; | |
c906108c | 16076 | case DW_FORM_indirect: |
a8329558 KW |
16077 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16078 | info_ptr += bytes_read; | |
dee91e82 | 16079 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 16080 | break; |
3019eac3 DE |
16081 | case DW_FORM_GNU_addr_index: |
16082 | if (reader->dwo_file == NULL) | |
16083 | { | |
16084 | /* For now flag a hard error. | |
16085 | Later we can turn this into a complaint. */ | |
16086 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16087 | dwarf_form_name (form), | |
16088 | bfd_get_filename (abfd)); | |
16089 | } | |
16090 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16091 | info_ptr += bytes_read; | |
16092 | break; | |
16093 | case DW_FORM_GNU_str_index: | |
16094 | if (reader->dwo_file == NULL) | |
16095 | { | |
16096 | /* For now flag a hard error. | |
16097 | Later we can turn this into a complaint if warranted. */ | |
16098 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16099 | dwarf_form_name (form), | |
16100 | bfd_get_filename (abfd)); | |
16101 | } | |
16102 | { | |
16103 | ULONGEST str_index = | |
16104 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16105 | ||
342587c4 | 16106 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16107 | DW_STRING_IS_CANONICAL (attr) = 0; |
16108 | info_ptr += bytes_read; | |
16109 | } | |
16110 | break; | |
c906108c | 16111 | default: |
8a3fe4f8 | 16112 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16113 | dwarf_form_name (form), |
16114 | bfd_get_filename (abfd)); | |
c906108c | 16115 | } |
28e94949 | 16116 | |
36586728 | 16117 | /* Super hack. */ |
7771576e | 16118 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16119 | attr->form = DW_FORM_GNU_ref_alt; |
16120 | ||
28e94949 JB |
16121 | /* We have seen instances where the compiler tried to emit a byte |
16122 | size attribute of -1 which ended up being encoded as an unsigned | |
16123 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16124 | an object of this size seems pretty unlikely so we can relatively | |
16125 | safely treat these cases as if the size attribute was invalid and | |
16126 | treat them as zero by default. */ | |
16127 | if (attr->name == DW_AT_byte_size | |
16128 | && form == DW_FORM_data4 | |
16129 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16130 | { |
16131 | complaint | |
16132 | (&symfile_complaints, | |
43bbcdc2 PH |
16133 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
16134 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
16135 | DW_UNSND (attr) = 0; |
16136 | } | |
28e94949 | 16137 | |
c906108c SS |
16138 | return info_ptr; |
16139 | } | |
16140 | ||
a8329558 KW |
16141 | /* Read an attribute described by an abbreviated attribute. */ |
16142 | ||
d521ce57 | 16143 | static const gdb_byte * |
dee91e82 DE |
16144 | read_attribute (const struct die_reader_specs *reader, |
16145 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 16146 | const gdb_byte *info_ptr) |
a8329558 KW |
16147 | { |
16148 | attr->name = abbrev->name; | |
dee91e82 | 16149 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
16150 | } |
16151 | ||
0963b4bd | 16152 | /* Read dwarf information from a buffer. */ |
c906108c SS |
16153 | |
16154 | static unsigned int | |
a1855c1d | 16155 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16156 | { |
fe1b8b76 | 16157 | return bfd_get_8 (abfd, buf); |
c906108c SS |
16158 | } |
16159 | ||
16160 | static int | |
a1855c1d | 16161 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 16162 | { |
fe1b8b76 | 16163 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
16164 | } |
16165 | ||
16166 | static unsigned int | |
a1855c1d | 16167 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16168 | { |
fe1b8b76 | 16169 | return bfd_get_16 (abfd, buf); |
c906108c SS |
16170 | } |
16171 | ||
21ae7a4d | 16172 | static int |
a1855c1d | 16173 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16174 | { |
16175 | return bfd_get_signed_16 (abfd, buf); | |
16176 | } | |
16177 | ||
c906108c | 16178 | static unsigned int |
a1855c1d | 16179 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16180 | { |
fe1b8b76 | 16181 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16182 | } |
16183 | ||
21ae7a4d | 16184 | static int |
a1855c1d | 16185 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16186 | { |
16187 | return bfd_get_signed_32 (abfd, buf); | |
16188 | } | |
16189 | ||
93311388 | 16190 | static ULONGEST |
a1855c1d | 16191 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16192 | { |
fe1b8b76 | 16193 | return bfd_get_64 (abfd, buf); |
c906108c SS |
16194 | } |
16195 | ||
16196 | static CORE_ADDR | |
d521ce57 | 16197 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 16198 | unsigned int *bytes_read) |
c906108c | 16199 | { |
e7c27a73 | 16200 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16201 | CORE_ADDR retval = 0; |
16202 | ||
107d2387 | 16203 | if (cu_header->signed_addr_p) |
c906108c | 16204 | { |
107d2387 AC |
16205 | switch (cu_header->addr_size) |
16206 | { | |
16207 | case 2: | |
fe1b8b76 | 16208 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
16209 | break; |
16210 | case 4: | |
fe1b8b76 | 16211 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
16212 | break; |
16213 | case 8: | |
fe1b8b76 | 16214 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
16215 | break; |
16216 | default: | |
8e65ff28 | 16217 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 16218 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 16219 | bfd_get_filename (abfd)); |
107d2387 AC |
16220 | } |
16221 | } | |
16222 | else | |
16223 | { | |
16224 | switch (cu_header->addr_size) | |
16225 | { | |
16226 | case 2: | |
fe1b8b76 | 16227 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
16228 | break; |
16229 | case 4: | |
fe1b8b76 | 16230 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
16231 | break; |
16232 | case 8: | |
fe1b8b76 | 16233 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
16234 | break; |
16235 | default: | |
8e65ff28 | 16236 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
16237 | _("read_address: bad switch, " |
16238 | "unsigned [in module %s]"), | |
659b0389 | 16239 | bfd_get_filename (abfd)); |
107d2387 | 16240 | } |
c906108c | 16241 | } |
64367e0a | 16242 | |
107d2387 AC |
16243 | *bytes_read = cu_header->addr_size; |
16244 | return retval; | |
c906108c SS |
16245 | } |
16246 | ||
f7ef9339 | 16247 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
16248 | specification allows the initial length to take up either 4 bytes |
16249 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
16250 | bytes describe the length and all offsets will be 8 bytes in length | |
16251 | instead of 4. | |
16252 | ||
f7ef9339 KB |
16253 | An older, non-standard 64-bit format is also handled by this |
16254 | function. The older format in question stores the initial length | |
16255 | as an 8-byte quantity without an escape value. Lengths greater | |
16256 | than 2^32 aren't very common which means that the initial 4 bytes | |
16257 | is almost always zero. Since a length value of zero doesn't make | |
16258 | sense for the 32-bit format, this initial zero can be considered to | |
16259 | be an escape value which indicates the presence of the older 64-bit | |
16260 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
16261 | greater than 4GB. If it becomes necessary to handle lengths |
16262 | somewhat larger than 4GB, we could allow other small values (such | |
16263 | as the non-sensical values of 1, 2, and 3) to also be used as | |
16264 | escape values indicating the presence of the old format. | |
f7ef9339 | 16265 | |
917c78fc MK |
16266 | The value returned via bytes_read should be used to increment the |
16267 | relevant pointer after calling read_initial_length(). | |
c764a876 | 16268 | |
613e1657 KB |
16269 | [ Note: read_initial_length() and read_offset() are based on the |
16270 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 16271 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
16272 | from: |
16273 | ||
f7ef9339 | 16274 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 16275 | |
613e1657 KB |
16276 | This document is only a draft and is subject to change. (So beware.) |
16277 | ||
f7ef9339 | 16278 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
16279 | determined empirically by examining 64-bit ELF files produced by |
16280 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
16281 | |
16282 | - Kevin, July 16, 2002 | |
613e1657 KB |
16283 | ] */ |
16284 | ||
16285 | static LONGEST | |
d521ce57 | 16286 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 16287 | { |
fe1b8b76 | 16288 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 16289 | |
dd373385 | 16290 | if (length == 0xffffffff) |
613e1657 | 16291 | { |
fe1b8b76 | 16292 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 16293 | *bytes_read = 12; |
613e1657 | 16294 | } |
dd373385 | 16295 | else if (length == 0) |
f7ef9339 | 16296 | { |
dd373385 | 16297 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 16298 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 16299 | *bytes_read = 8; |
f7ef9339 | 16300 | } |
613e1657 KB |
16301 | else |
16302 | { | |
16303 | *bytes_read = 4; | |
613e1657 KB |
16304 | } |
16305 | ||
c764a876 DE |
16306 | return length; |
16307 | } | |
dd373385 | 16308 | |
c764a876 DE |
16309 | /* Cover function for read_initial_length. |
16310 | Returns the length of the object at BUF, and stores the size of the | |
16311 | initial length in *BYTES_READ and stores the size that offsets will be in | |
16312 | *OFFSET_SIZE. | |
16313 | If the initial length size is not equivalent to that specified in | |
16314 | CU_HEADER then issue a complaint. | |
16315 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 16316 | |
c764a876 | 16317 | static LONGEST |
d521ce57 | 16318 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
16319 | const struct comp_unit_head *cu_header, |
16320 | unsigned int *bytes_read, | |
16321 | unsigned int *offset_size) | |
16322 | { | |
16323 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
16324 | ||
16325 | gdb_assert (cu_header->initial_length_size == 4 | |
16326 | || cu_header->initial_length_size == 8 | |
16327 | || cu_header->initial_length_size == 12); | |
16328 | ||
16329 | if (cu_header->initial_length_size != *bytes_read) | |
16330 | complaint (&symfile_complaints, | |
16331 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 16332 | |
c764a876 | 16333 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 16334 | return length; |
613e1657 KB |
16335 | } |
16336 | ||
16337 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 16338 | given by cu_header->offset_size. */ |
613e1657 KB |
16339 | |
16340 | static LONGEST | |
d521ce57 TT |
16341 | read_offset (bfd *abfd, const gdb_byte *buf, |
16342 | const struct comp_unit_head *cu_header, | |
891d2f0b | 16343 | unsigned int *bytes_read) |
c764a876 DE |
16344 | { |
16345 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 16346 | |
c764a876 DE |
16347 | *bytes_read = cu_header->offset_size; |
16348 | return offset; | |
16349 | } | |
16350 | ||
16351 | /* Read an offset from the data stream. */ | |
16352 | ||
16353 | static LONGEST | |
d521ce57 | 16354 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
16355 | { |
16356 | LONGEST retval = 0; | |
16357 | ||
c764a876 | 16358 | switch (offset_size) |
613e1657 KB |
16359 | { |
16360 | case 4: | |
fe1b8b76 | 16361 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
16362 | break; |
16363 | case 8: | |
fe1b8b76 | 16364 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
16365 | break; |
16366 | default: | |
8e65ff28 | 16367 | internal_error (__FILE__, __LINE__, |
c764a876 | 16368 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 16369 | bfd_get_filename (abfd)); |
613e1657 KB |
16370 | } |
16371 | ||
917c78fc | 16372 | return retval; |
613e1657 KB |
16373 | } |
16374 | ||
d521ce57 TT |
16375 | static const gdb_byte * |
16376 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
16377 | { |
16378 | /* If the size of a host char is 8 bits, we can return a pointer | |
16379 | to the buffer, otherwise we have to copy the data to a buffer | |
16380 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16381 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 16382 | return buf; |
c906108c SS |
16383 | } |
16384 | ||
d521ce57 TT |
16385 | static const char * |
16386 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
16387 | unsigned int *bytes_read_ptr) | |
c906108c SS |
16388 | { |
16389 | /* If the size of a host char is 8 bits, we can return a pointer | |
16390 | to the string, otherwise we have to copy the string to a buffer | |
16391 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16392 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
16393 | if (*buf == '\0') |
16394 | { | |
16395 | *bytes_read_ptr = 1; | |
16396 | return NULL; | |
16397 | } | |
d521ce57 TT |
16398 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
16399 | return (const char *) buf; | |
4bdf3d34 JJ |
16400 | } |
16401 | ||
d521ce57 | 16402 | static const char * |
cf2c3c16 | 16403 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 16404 | { |
be391dca | 16405 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 16406 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
16407 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
16408 | bfd_get_filename (abfd)); | |
dce234bc | 16409 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
16410 | error (_("DW_FORM_strp pointing outside of " |
16411 | ".debug_str section [in module %s]"), | |
16412 | bfd_get_filename (abfd)); | |
4bdf3d34 | 16413 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 16414 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 16415 | return NULL; |
d521ce57 | 16416 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
16417 | } |
16418 | ||
36586728 TT |
16419 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
16420 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
16421 | the string consists of a single NUL byte, return NULL; otherwise | |
16422 | return a pointer to the string. */ | |
16423 | ||
d521ce57 | 16424 | static const char * |
36586728 TT |
16425 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
16426 | { | |
16427 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
16428 | ||
16429 | if (dwz->str.buffer == NULL) | |
16430 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
16431 | "section [in module %s]"), | |
16432 | bfd_get_filename (dwz->dwz_bfd)); | |
16433 | if (str_offset >= dwz->str.size) | |
16434 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
16435 | ".debug_str section [in module %s]"), | |
16436 | bfd_get_filename (dwz->dwz_bfd)); | |
16437 | gdb_assert (HOST_CHAR_BIT == 8); | |
16438 | if (dwz->str.buffer[str_offset] == '\0') | |
16439 | return NULL; | |
d521ce57 | 16440 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
16441 | } |
16442 | ||
d521ce57 TT |
16443 | static const char * |
16444 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
16445 | const struct comp_unit_head *cu_header, |
16446 | unsigned int *bytes_read_ptr) | |
16447 | { | |
16448 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
16449 | ||
16450 | return read_indirect_string_at_offset (abfd, str_offset); | |
16451 | } | |
16452 | ||
12df843f | 16453 | static ULONGEST |
d521ce57 TT |
16454 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
16455 | unsigned int *bytes_read_ptr) | |
c906108c | 16456 | { |
12df843f | 16457 | ULONGEST result; |
ce5d95e1 | 16458 | unsigned int num_read; |
c906108c SS |
16459 | int i, shift; |
16460 | unsigned char byte; | |
16461 | ||
16462 | result = 0; | |
16463 | shift = 0; | |
16464 | num_read = 0; | |
16465 | i = 0; | |
16466 | while (1) | |
16467 | { | |
fe1b8b76 | 16468 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16469 | buf++; |
16470 | num_read++; | |
12df843f | 16471 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
16472 | if ((byte & 128) == 0) |
16473 | { | |
16474 | break; | |
16475 | } | |
16476 | shift += 7; | |
16477 | } | |
16478 | *bytes_read_ptr = num_read; | |
16479 | return result; | |
16480 | } | |
16481 | ||
12df843f | 16482 | static LONGEST |
d521ce57 TT |
16483 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
16484 | unsigned int *bytes_read_ptr) | |
c906108c | 16485 | { |
12df843f | 16486 | LONGEST result; |
77e0b926 | 16487 | int i, shift, num_read; |
c906108c SS |
16488 | unsigned char byte; |
16489 | ||
16490 | result = 0; | |
16491 | shift = 0; | |
c906108c SS |
16492 | num_read = 0; |
16493 | i = 0; | |
16494 | while (1) | |
16495 | { | |
fe1b8b76 | 16496 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16497 | buf++; |
16498 | num_read++; | |
12df843f | 16499 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
16500 | shift += 7; |
16501 | if ((byte & 128) == 0) | |
16502 | { | |
16503 | break; | |
16504 | } | |
16505 | } | |
77e0b926 | 16506 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 16507 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
16508 | *bytes_read_ptr = num_read; |
16509 | return result; | |
16510 | } | |
16511 | ||
3019eac3 DE |
16512 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
16513 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
16514 | ADDR_SIZE is the size of addresses from the CU header. */ | |
16515 | ||
16516 | static CORE_ADDR | |
16517 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
16518 | { | |
16519 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16520 | bfd *abfd = objfile->obfd; | |
16521 | const gdb_byte *info_ptr; | |
16522 | ||
16523 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
16524 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
16525 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 16526 | objfile_name (objfile)); |
3019eac3 DE |
16527 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
16528 | error (_("DW_FORM_addr_index pointing outside of " | |
16529 | ".debug_addr section [in module %s]"), | |
4262abfb | 16530 | objfile_name (objfile)); |
3019eac3 DE |
16531 | info_ptr = (dwarf2_per_objfile->addr.buffer |
16532 | + addr_base + addr_index * addr_size); | |
16533 | if (addr_size == 4) | |
16534 | return bfd_get_32 (abfd, info_ptr); | |
16535 | else | |
16536 | return bfd_get_64 (abfd, info_ptr); | |
16537 | } | |
16538 | ||
16539 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
16540 | ||
16541 | static CORE_ADDR | |
16542 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
16543 | { | |
16544 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
16545 | } | |
16546 | ||
16547 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
16548 | ||
16549 | static CORE_ADDR | |
d521ce57 | 16550 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
16551 | unsigned int *bytes_read) |
16552 | { | |
16553 | bfd *abfd = cu->objfile->obfd; | |
16554 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
16555 | ||
16556 | return read_addr_index (cu, addr_index); | |
16557 | } | |
16558 | ||
16559 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
16560 | back to dwarf2_read_addr_index. */ | |
16561 | ||
16562 | struct dwarf2_read_addr_index_data | |
16563 | { | |
16564 | ULONGEST addr_base; | |
16565 | int addr_size; | |
16566 | }; | |
16567 | ||
16568 | /* die_reader_func for dwarf2_read_addr_index. */ | |
16569 | ||
16570 | static void | |
16571 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 16572 | const gdb_byte *info_ptr, |
3019eac3 DE |
16573 | struct die_info *comp_unit_die, |
16574 | int has_children, | |
16575 | void *data) | |
16576 | { | |
16577 | struct dwarf2_cu *cu = reader->cu; | |
16578 | struct dwarf2_read_addr_index_data *aidata = | |
16579 | (struct dwarf2_read_addr_index_data *) data; | |
16580 | ||
16581 | aidata->addr_base = cu->addr_base; | |
16582 | aidata->addr_size = cu->header.addr_size; | |
16583 | } | |
16584 | ||
16585 | /* Given an index in .debug_addr, fetch the value. | |
16586 | NOTE: This can be called during dwarf expression evaluation, | |
16587 | long after the debug information has been read, and thus per_cu->cu | |
16588 | may no longer exist. */ | |
16589 | ||
16590 | CORE_ADDR | |
16591 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
16592 | unsigned int addr_index) | |
16593 | { | |
16594 | struct objfile *objfile = per_cu->objfile; | |
16595 | struct dwarf2_cu *cu = per_cu->cu; | |
16596 | ULONGEST addr_base; | |
16597 | int addr_size; | |
16598 | ||
16599 | /* This is intended to be called from outside this file. */ | |
16600 | dw2_setup (objfile); | |
16601 | ||
16602 | /* We need addr_base and addr_size. | |
16603 | If we don't have PER_CU->cu, we have to get it. | |
16604 | Nasty, but the alternative is storing the needed info in PER_CU, | |
16605 | which at this point doesn't seem justified: it's not clear how frequently | |
16606 | it would get used and it would increase the size of every PER_CU. | |
16607 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
16608 | so we're not in uncharted territory here. | |
16609 | Alas we need to be a bit more complicated as addr_base is contained | |
16610 | in the DIE. | |
16611 | ||
16612 | We don't need to read the entire CU(/TU). | |
16613 | We just need the header and top level die. | |
a1b64ce1 | 16614 | |
3019eac3 | 16615 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 16616 | For now we skip this optimization. */ |
3019eac3 DE |
16617 | |
16618 | if (cu != NULL) | |
16619 | { | |
16620 | addr_base = cu->addr_base; | |
16621 | addr_size = cu->header.addr_size; | |
16622 | } | |
16623 | else | |
16624 | { | |
16625 | struct dwarf2_read_addr_index_data aidata; | |
16626 | ||
a1b64ce1 DE |
16627 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
16628 | we need addr_base. */ | |
16629 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
16630 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
16631 | addr_base = aidata.addr_base; |
16632 | addr_size = aidata.addr_size; | |
16633 | } | |
16634 | ||
16635 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
16636 | } | |
16637 | ||
57d63ce2 DE |
16638 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
16639 | This is only used by the Fission support. */ | |
3019eac3 | 16640 | |
d521ce57 | 16641 | static const char * |
342587c4 | 16642 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
16643 | { |
16644 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 16645 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 16646 | bfd *abfd = objfile->obfd; |
342587c4 | 16647 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
16648 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
16649 | struct dwarf2_section_info *str_offsets_section = | |
16650 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 16651 | const gdb_byte *info_ptr; |
3019eac3 | 16652 | ULONGEST str_offset; |
57d63ce2 | 16653 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 16654 | |
73869dc2 DE |
16655 | dwarf2_read_section (objfile, str_section); |
16656 | dwarf2_read_section (objfile, str_offsets_section); | |
16657 | if (str_section->buffer == NULL) | |
57d63ce2 | 16658 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 16659 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16660 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16661 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 16662 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 16663 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16664 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16665 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 16666 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 16667 | " section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16668 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16669 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
16670 | + str_index * cu->header.offset_size); |
16671 | if (cu->header.offset_size == 4) | |
16672 | str_offset = bfd_get_32 (abfd, info_ptr); | |
16673 | else | |
16674 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 16675 | if (str_offset >= str_section->size) |
57d63ce2 | 16676 | error (_("Offset from %s pointing outside of" |
3019eac3 | 16677 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16678 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16679 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
16680 | } |
16681 | ||
3019eac3 DE |
16682 | /* Return the length of an LEB128 number in BUF. */ |
16683 | ||
16684 | static int | |
16685 | leb128_size (const gdb_byte *buf) | |
16686 | { | |
16687 | const gdb_byte *begin = buf; | |
16688 | gdb_byte byte; | |
16689 | ||
16690 | while (1) | |
16691 | { | |
16692 | byte = *buf++; | |
16693 | if ((byte & 128) == 0) | |
16694 | return buf - begin; | |
16695 | } | |
16696 | } | |
16697 | ||
c906108c | 16698 | static void |
e142c38c | 16699 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
16700 | { |
16701 | switch (lang) | |
16702 | { | |
16703 | case DW_LANG_C89: | |
76bee0cc | 16704 | case DW_LANG_C99: |
c906108c | 16705 | case DW_LANG_C: |
d1be3247 | 16706 | case DW_LANG_UPC: |
e142c38c | 16707 | cu->language = language_c; |
c906108c SS |
16708 | break; |
16709 | case DW_LANG_C_plus_plus: | |
e142c38c | 16710 | cu->language = language_cplus; |
c906108c | 16711 | break; |
6aecb9c2 JB |
16712 | case DW_LANG_D: |
16713 | cu->language = language_d; | |
16714 | break; | |
c906108c SS |
16715 | case DW_LANG_Fortran77: |
16716 | case DW_LANG_Fortran90: | |
b21b22e0 | 16717 | case DW_LANG_Fortran95: |
e142c38c | 16718 | cu->language = language_fortran; |
c906108c | 16719 | break; |
a766d390 DE |
16720 | case DW_LANG_Go: |
16721 | cu->language = language_go; | |
16722 | break; | |
c906108c | 16723 | case DW_LANG_Mips_Assembler: |
e142c38c | 16724 | cu->language = language_asm; |
c906108c | 16725 | break; |
bebd888e | 16726 | case DW_LANG_Java: |
e142c38c | 16727 | cu->language = language_java; |
bebd888e | 16728 | break; |
c906108c | 16729 | case DW_LANG_Ada83: |
8aaf0b47 | 16730 | case DW_LANG_Ada95: |
bc5f45f8 JB |
16731 | cu->language = language_ada; |
16732 | break; | |
72019c9c GM |
16733 | case DW_LANG_Modula2: |
16734 | cu->language = language_m2; | |
16735 | break; | |
fe8e67fd PM |
16736 | case DW_LANG_Pascal83: |
16737 | cu->language = language_pascal; | |
16738 | break; | |
22566fbd DJ |
16739 | case DW_LANG_ObjC: |
16740 | cu->language = language_objc; | |
16741 | break; | |
c906108c SS |
16742 | case DW_LANG_Cobol74: |
16743 | case DW_LANG_Cobol85: | |
c906108c | 16744 | default: |
e142c38c | 16745 | cu->language = language_minimal; |
c906108c SS |
16746 | break; |
16747 | } | |
e142c38c | 16748 | cu->language_defn = language_def (cu->language); |
c906108c SS |
16749 | } |
16750 | ||
16751 | /* Return the named attribute or NULL if not there. */ | |
16752 | ||
16753 | static struct attribute * | |
e142c38c | 16754 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 16755 | { |
a48e046c | 16756 | for (;;) |
c906108c | 16757 | { |
a48e046c TT |
16758 | unsigned int i; |
16759 | struct attribute *spec = NULL; | |
16760 | ||
16761 | for (i = 0; i < die->num_attrs; ++i) | |
16762 | { | |
16763 | if (die->attrs[i].name == name) | |
16764 | return &die->attrs[i]; | |
16765 | if (die->attrs[i].name == DW_AT_specification | |
16766 | || die->attrs[i].name == DW_AT_abstract_origin) | |
16767 | spec = &die->attrs[i]; | |
16768 | } | |
16769 | ||
16770 | if (!spec) | |
16771 | break; | |
c906108c | 16772 | |
f2f0e013 | 16773 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 16774 | } |
c5aa993b | 16775 | |
c906108c SS |
16776 | return NULL; |
16777 | } | |
16778 | ||
348e048f DE |
16779 | /* Return the named attribute or NULL if not there, |
16780 | but do not follow DW_AT_specification, etc. | |
16781 | This is for use in contexts where we're reading .debug_types dies. | |
16782 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
16783 | back up the chain, and we want to go down. */ | |
16784 | ||
16785 | static struct attribute * | |
45e58e77 | 16786 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
16787 | { |
16788 | unsigned int i; | |
16789 | ||
16790 | for (i = 0; i < die->num_attrs; ++i) | |
16791 | if (die->attrs[i].name == name) | |
16792 | return &die->attrs[i]; | |
16793 | ||
16794 | return NULL; | |
16795 | } | |
16796 | ||
05cf31d1 JB |
16797 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
16798 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 16799 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
16800 | |
16801 | static int | |
16802 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
16803 | { | |
16804 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
16805 | ||
16806 | return (attr && DW_UNSND (attr)); | |
16807 | } | |
16808 | ||
3ca72b44 | 16809 | static int |
e142c38c | 16810 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 16811 | { |
05cf31d1 JB |
16812 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
16813 | which value is non-zero. However, we have to be careful with | |
16814 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
16815 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
16816 | end up accidently finding a declaration attribute that belongs | |
16817 | to a different DIE referenced by the specification attribute, | |
16818 | even though the given DIE does not have a declaration attribute. */ | |
16819 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
16820 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
16821 | } |
16822 | ||
63d06c5c | 16823 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 16824 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
16825 | containing the return value on output. If there is no |
16826 | specification, but there is an abstract origin, that is | |
16827 | returned. */ | |
63d06c5c DC |
16828 | |
16829 | static struct die_info * | |
f2f0e013 | 16830 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 16831 | { |
f2f0e013 DJ |
16832 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
16833 | *spec_cu); | |
63d06c5c | 16834 | |
edb3359d DJ |
16835 | if (spec_attr == NULL) |
16836 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
16837 | ||
63d06c5c DC |
16838 | if (spec_attr == NULL) |
16839 | return NULL; | |
16840 | else | |
f2f0e013 | 16841 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 16842 | } |
c906108c | 16843 | |
debd256d | 16844 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
16845 | refers to. |
16846 | NOTE: This is also used as a "cleanup" function. */ | |
16847 | ||
debd256d JB |
16848 | static void |
16849 | free_line_header (struct line_header *lh) | |
16850 | { | |
16851 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 16852 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
16853 | |
16854 | /* Remember that all the lh->file_names[i].name pointers are | |
16855 | pointers into debug_line_buffer, and don't need to be freed. */ | |
16856 | if (lh->file_names) | |
a8bc7b56 | 16857 | xfree (lh->file_names); |
debd256d JB |
16858 | |
16859 | /* Similarly for the include directory names. */ | |
16860 | if (lh->include_dirs) | |
a8bc7b56 | 16861 | xfree (lh->include_dirs); |
debd256d | 16862 | |
a8bc7b56 | 16863 | xfree (lh); |
debd256d JB |
16864 | } |
16865 | ||
debd256d | 16866 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 16867 | |
debd256d | 16868 | static void |
d521ce57 | 16869 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 16870 | { |
debd256d JB |
16871 | /* Grow the array if necessary. */ |
16872 | if (lh->include_dirs_size == 0) | |
c5aa993b | 16873 | { |
debd256d JB |
16874 | lh->include_dirs_size = 1; /* for testing */ |
16875 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
16876 | * sizeof (*lh->include_dirs)); | |
16877 | } | |
16878 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
16879 | { | |
16880 | lh->include_dirs_size *= 2; | |
16881 | lh->include_dirs = xrealloc (lh->include_dirs, | |
16882 | (lh->include_dirs_size | |
16883 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 16884 | } |
c906108c | 16885 | |
debd256d JB |
16886 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
16887 | } | |
6e70227d | 16888 | |
debd256d | 16889 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 16890 | |
debd256d JB |
16891 | static void |
16892 | add_file_name (struct line_header *lh, | |
d521ce57 | 16893 | const char *name, |
debd256d JB |
16894 | unsigned int dir_index, |
16895 | unsigned int mod_time, | |
16896 | unsigned int length) | |
16897 | { | |
16898 | struct file_entry *fe; | |
16899 | ||
16900 | /* Grow the array if necessary. */ | |
16901 | if (lh->file_names_size == 0) | |
16902 | { | |
16903 | lh->file_names_size = 1; /* for testing */ | |
16904 | lh->file_names = xmalloc (lh->file_names_size | |
16905 | * sizeof (*lh->file_names)); | |
16906 | } | |
16907 | else if (lh->num_file_names >= lh->file_names_size) | |
16908 | { | |
16909 | lh->file_names_size *= 2; | |
16910 | lh->file_names = xrealloc (lh->file_names, | |
16911 | (lh->file_names_size | |
16912 | * sizeof (*lh->file_names))); | |
16913 | } | |
16914 | ||
16915 | fe = &lh->file_names[lh->num_file_names++]; | |
16916 | fe->name = name; | |
16917 | fe->dir_index = dir_index; | |
16918 | fe->mod_time = mod_time; | |
16919 | fe->length = length; | |
aaa75496 | 16920 | fe->included_p = 0; |
cb1df416 | 16921 | fe->symtab = NULL; |
debd256d | 16922 | } |
6e70227d | 16923 | |
36586728 TT |
16924 | /* A convenience function to find the proper .debug_line section for a |
16925 | CU. */ | |
16926 | ||
16927 | static struct dwarf2_section_info * | |
16928 | get_debug_line_section (struct dwarf2_cu *cu) | |
16929 | { | |
16930 | struct dwarf2_section_info *section; | |
16931 | ||
16932 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
16933 | DWO file. */ | |
16934 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
16935 | section = &cu->dwo_unit->dwo_file->sections.line; | |
16936 | else if (cu->per_cu->is_dwz) | |
16937 | { | |
16938 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16939 | ||
16940 | section = &dwz->line; | |
16941 | } | |
16942 | else | |
16943 | section = &dwarf2_per_objfile->line; | |
16944 | ||
16945 | return section; | |
16946 | } | |
16947 | ||
debd256d | 16948 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 16949 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 16950 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
16951 | |
16952 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
16953 | the returned object point into the dwarf line section buffer, |
16954 | and must not be freed. */ | |
ae2de4f8 | 16955 | |
debd256d | 16956 | static struct line_header * |
3019eac3 | 16957 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
16958 | { |
16959 | struct cleanup *back_to; | |
16960 | struct line_header *lh; | |
d521ce57 | 16961 | const gdb_byte *line_ptr; |
c764a876 | 16962 | unsigned int bytes_read, offset_size; |
debd256d | 16963 | int i; |
d521ce57 | 16964 | const char *cur_dir, *cur_file; |
3019eac3 DE |
16965 | struct dwarf2_section_info *section; |
16966 | bfd *abfd; | |
16967 | ||
36586728 | 16968 | section = get_debug_line_section (cu); |
3019eac3 DE |
16969 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
16970 | if (section->buffer == NULL) | |
debd256d | 16971 | { |
3019eac3 DE |
16972 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
16973 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
16974 | else | |
16975 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
16976 | return 0; |
16977 | } | |
16978 | ||
fceca515 DE |
16979 | /* We can't do this until we know the section is non-empty. |
16980 | Only then do we know we have such a section. */ | |
a32a8923 | 16981 | abfd = get_section_bfd_owner (section); |
fceca515 | 16982 | |
a738430d MK |
16983 | /* Make sure that at least there's room for the total_length field. |
16984 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 16985 | if (offset + 4 >= section->size) |
debd256d | 16986 | { |
4d3c2250 | 16987 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
16988 | return 0; |
16989 | } | |
16990 | ||
16991 | lh = xmalloc (sizeof (*lh)); | |
16992 | memset (lh, 0, sizeof (*lh)); | |
16993 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
16994 | (void *) lh); | |
16995 | ||
3019eac3 | 16996 | line_ptr = section->buffer + offset; |
debd256d | 16997 | |
a738430d | 16998 | /* Read in the header. */ |
6e70227d | 16999 | lh->total_length = |
c764a876 DE |
17000 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
17001 | &bytes_read, &offset_size); | |
debd256d | 17002 | line_ptr += bytes_read; |
3019eac3 | 17003 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 17004 | { |
4d3c2250 | 17005 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 17006 | do_cleanups (back_to); |
debd256d JB |
17007 | return 0; |
17008 | } | |
17009 | lh->statement_program_end = line_ptr + lh->total_length; | |
17010 | lh->version = read_2_bytes (abfd, line_ptr); | |
17011 | line_ptr += 2; | |
c764a876 DE |
17012 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
17013 | line_ptr += offset_size; | |
debd256d JB |
17014 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
17015 | line_ptr += 1; | |
2dc7f7b3 TT |
17016 | if (lh->version >= 4) |
17017 | { | |
17018 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
17019 | line_ptr += 1; | |
17020 | } | |
17021 | else | |
17022 | lh->maximum_ops_per_instruction = 1; | |
17023 | ||
17024 | if (lh->maximum_ops_per_instruction == 0) | |
17025 | { | |
17026 | lh->maximum_ops_per_instruction = 1; | |
17027 | complaint (&symfile_complaints, | |
3e43a32a MS |
17028 | _("invalid maximum_ops_per_instruction " |
17029 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
17030 | } |
17031 | ||
debd256d JB |
17032 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
17033 | line_ptr += 1; | |
17034 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
17035 | line_ptr += 1; | |
17036 | lh->line_range = read_1_byte (abfd, line_ptr); | |
17037 | line_ptr += 1; | |
17038 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
17039 | line_ptr += 1; | |
17040 | lh->standard_opcode_lengths | |
fe1b8b76 | 17041 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
17042 | |
17043 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
17044 | for (i = 1; i < lh->opcode_base; ++i) | |
17045 | { | |
17046 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
17047 | line_ptr += 1; | |
17048 | } | |
17049 | ||
a738430d | 17050 | /* Read directory table. */ |
9b1c24c8 | 17051 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17052 | { |
17053 | line_ptr += bytes_read; | |
17054 | add_include_dir (lh, cur_dir); | |
17055 | } | |
17056 | line_ptr += bytes_read; | |
17057 | ||
a738430d | 17058 | /* Read file name table. */ |
9b1c24c8 | 17059 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
17060 | { |
17061 | unsigned int dir_index, mod_time, length; | |
17062 | ||
17063 | line_ptr += bytes_read; | |
17064 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17065 | line_ptr += bytes_read; | |
17066 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17067 | line_ptr += bytes_read; | |
17068 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17069 | line_ptr += bytes_read; | |
17070 | ||
17071 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17072 | } | |
17073 | line_ptr += bytes_read; | |
6e70227d | 17074 | lh->statement_program_start = line_ptr; |
debd256d | 17075 | |
3019eac3 | 17076 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 17077 | complaint (&symfile_complaints, |
3e43a32a MS |
17078 | _("line number info header doesn't " |
17079 | "fit in `.debug_line' section")); | |
debd256d JB |
17080 | |
17081 | discard_cleanups (back_to); | |
17082 | return lh; | |
17083 | } | |
c906108c | 17084 | |
c6da4cef DE |
17085 | /* Subroutine of dwarf_decode_lines to simplify it. |
17086 | Return the file name of the psymtab for included file FILE_INDEX | |
17087 | in line header LH of PST. | |
17088 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17089 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
17090 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
17091 | ||
17092 | The function creates dangling cleanup registration. */ | |
c6da4cef | 17093 | |
d521ce57 | 17094 | static const char * |
c6da4cef DE |
17095 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
17096 | const struct partial_symtab *pst, | |
17097 | const char *comp_dir) | |
17098 | { | |
17099 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
17100 | const char *include_name = fe.name; |
17101 | const char *include_name_to_compare = include_name; | |
17102 | const char *dir_name = NULL; | |
72b9f47f TT |
17103 | const char *pst_filename; |
17104 | char *copied_name = NULL; | |
c6da4cef DE |
17105 | int file_is_pst; |
17106 | ||
17107 | if (fe.dir_index) | |
17108 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
17109 | ||
17110 | if (!IS_ABSOLUTE_PATH (include_name) | |
17111 | && (dir_name != NULL || comp_dir != NULL)) | |
17112 | { | |
17113 | /* Avoid creating a duplicate psymtab for PST. | |
17114 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
17115 | Before we do the comparison, however, we need to account | |
17116 | for DIR_NAME and COMP_DIR. | |
17117 | First prepend dir_name (if non-NULL). If we still don't | |
17118 | have an absolute path prepend comp_dir (if non-NULL). | |
17119 | However, the directory we record in the include-file's | |
17120 | psymtab does not contain COMP_DIR (to match the | |
17121 | corresponding symtab(s)). | |
17122 | ||
17123 | Example: | |
17124 | ||
17125 | bash$ cd /tmp | |
17126 | bash$ gcc -g ./hello.c | |
17127 | include_name = "hello.c" | |
17128 | dir_name = "." | |
17129 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
17130 | DW_AT_name = "./hello.c" |
17131 | ||
17132 | */ | |
c6da4cef DE |
17133 | |
17134 | if (dir_name != NULL) | |
17135 | { | |
d521ce57 TT |
17136 | char *tem = concat (dir_name, SLASH_STRING, |
17137 | include_name, (char *)NULL); | |
17138 | ||
17139 | make_cleanup (xfree, tem); | |
17140 | include_name = tem; | |
c6da4cef | 17141 | include_name_to_compare = include_name; |
c6da4cef DE |
17142 | } |
17143 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
17144 | { | |
d521ce57 TT |
17145 | char *tem = concat (comp_dir, SLASH_STRING, |
17146 | include_name, (char *)NULL); | |
17147 | ||
17148 | make_cleanup (xfree, tem); | |
17149 | include_name_to_compare = tem; | |
c6da4cef DE |
17150 | } |
17151 | } | |
17152 | ||
17153 | pst_filename = pst->filename; | |
17154 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
17155 | { | |
72b9f47f TT |
17156 | copied_name = concat (pst->dirname, SLASH_STRING, |
17157 | pst_filename, (char *)NULL); | |
17158 | pst_filename = copied_name; | |
c6da4cef DE |
17159 | } |
17160 | ||
1e3fad37 | 17161 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 17162 | |
72b9f47f TT |
17163 | if (copied_name != NULL) |
17164 | xfree (copied_name); | |
c6da4cef DE |
17165 | |
17166 | if (file_is_pst) | |
17167 | return NULL; | |
17168 | return include_name; | |
17169 | } | |
17170 | ||
c91513d8 PP |
17171 | /* Ignore this record_line request. */ |
17172 | ||
17173 | static void | |
17174 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
17175 | { | |
17176 | return; | |
17177 | } | |
17178 | ||
a05a36a5 DE |
17179 | /* Return non-zero if we should add LINE to the line number table. |
17180 | LINE is the line to add, LAST_LINE is the last line that was added, | |
17181 | LAST_SUBFILE is the subfile for LAST_LINE. | |
17182 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
17183 | had a non-zero discriminator. | |
17184 | ||
17185 | We have to be careful in the presence of discriminators. | |
17186 | E.g., for this line: | |
17187 | ||
17188 | for (i = 0; i < 100000; i++); | |
17189 | ||
17190 | clang can emit four line number entries for that one line, | |
17191 | each with a different discriminator. | |
17192 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
17193 | ||
17194 | However, we want gdb to coalesce all four entries into one. | |
17195 | Otherwise the user could stepi into the middle of the line and | |
17196 | gdb would get confused about whether the pc really was in the | |
17197 | middle of the line. | |
17198 | ||
17199 | Things are further complicated by the fact that two consecutive | |
17200 | line number entries for the same line is a heuristic used by gcc | |
17201 | to denote the end of the prologue. So we can't just discard duplicate | |
17202 | entries, we have to be selective about it. The heuristic we use is | |
17203 | that we only collapse consecutive entries for the same line if at least | |
17204 | one of those entries has a non-zero discriminator. PR 17276. | |
17205 | ||
17206 | Note: Addresses in the line number state machine can never go backwards | |
17207 | within one sequence, thus this coalescing is ok. */ | |
17208 | ||
17209 | static int | |
17210 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
17211 | int line_has_non_zero_discriminator, | |
17212 | struct subfile *last_subfile) | |
17213 | { | |
17214 | if (current_subfile != last_subfile) | |
17215 | return 1; | |
17216 | if (line != last_line) | |
17217 | return 1; | |
17218 | /* Same line for the same file that we've seen already. | |
17219 | As a last check, for pr 17276, only record the line if the line | |
17220 | has never had a non-zero discriminator. */ | |
17221 | if (!line_has_non_zero_discriminator) | |
17222 | return 1; | |
17223 | return 0; | |
17224 | } | |
17225 | ||
252a6764 DE |
17226 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
17227 | in the line table of subfile SUBFILE. */ | |
17228 | ||
17229 | static void | |
17230 | dwarf_record_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
17231 | unsigned int line, CORE_ADDR address, | |
17232 | record_line_ftype p_record_line) | |
17233 | { | |
17234 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17235 | ||
d5962de5 | 17236 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
17237 | } |
17238 | ||
17239 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
17240 | Mark the end of a set of line number records. | |
17241 | The arguments are the same as for dwarf_record_line. | |
17242 | If SUBFILE is NULL the request is ignored. */ | |
17243 | ||
17244 | static void | |
17245 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
17246 | CORE_ADDR address, record_line_ftype p_record_line) | |
17247 | { | |
17248 | if (subfile != NULL) | |
17249 | dwarf_record_line (gdbarch, subfile, 0, address, p_record_line); | |
17250 | } | |
17251 | ||
f3f5162e DE |
17252 | /* Subroutine of dwarf_decode_lines to simplify it. |
17253 | Process the line number information in LH. */ | |
debd256d | 17254 | |
c906108c | 17255 | static void |
f3f5162e | 17256 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
c3b7b696 YQ |
17257 | struct dwarf2_cu *cu, const int decode_for_pst_p, |
17258 | CORE_ADDR lowpc) | |
c906108c | 17259 | { |
d521ce57 TT |
17260 | const gdb_byte *line_ptr, *extended_end; |
17261 | const gdb_byte *line_end; | |
a8c50c1f | 17262 | unsigned int bytes_read, extended_len; |
699ca60a | 17263 | unsigned char op_code, extended_op; |
e142c38c DJ |
17264 | CORE_ADDR baseaddr; |
17265 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 17266 | bfd *abfd = objfile->obfd; |
fbf65064 | 17267 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
f3f5162e | 17268 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
17269 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
17270 | = record_line; | |
e142c38c DJ |
17271 | |
17272 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17273 | |
debd256d JB |
17274 | line_ptr = lh->statement_program_start; |
17275 | line_end = lh->statement_program_end; | |
c906108c SS |
17276 | |
17277 | /* Read the statement sequences until there's nothing left. */ | |
17278 | while (line_ptr < line_end) | |
17279 | { | |
17280 | /* state machine registers */ | |
17281 | CORE_ADDR address = 0; | |
17282 | unsigned int file = 1; | |
17283 | unsigned int line = 1; | |
debd256d | 17284 | int is_stmt = lh->default_is_stmt; |
c906108c | 17285 | int end_sequence = 0; |
2dc7f7b3 | 17286 | unsigned char op_index = 0; |
a05a36a5 DE |
17287 | unsigned int discriminator = 0; |
17288 | /* The last line number that was recorded, used to coalesce | |
17289 | consecutive entries for the same line. This can happen, for | |
17290 | example, when discriminators are present. PR 17276. */ | |
17291 | unsigned int last_line = 0; | |
17292 | int line_has_non_zero_discriminator = 0; | |
c906108c | 17293 | |
aaa75496 | 17294 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 17295 | { |
aaa75496 | 17296 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
17297 | /* lh->include_dirs and lh->file_names are 0-based, but the |
17298 | directory and file name numbers in the statement program | |
17299 | are 1-based. */ | |
17300 | struct file_entry *fe = &lh->file_names[file - 1]; | |
d521ce57 | 17301 | const char *dir = NULL; |
a738430d | 17302 | |
debd256d JB |
17303 | if (fe->dir_index) |
17304 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
17305 | |
17306 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
17307 | } |
17308 | ||
a738430d | 17309 | /* Decode the table. */ |
c5aa993b | 17310 | while (!end_sequence) |
c906108c SS |
17311 | { |
17312 | op_code = read_1_byte (abfd, line_ptr); | |
17313 | line_ptr += 1; | |
59205f5a JB |
17314 | if (line_ptr > line_end) |
17315 | { | |
17316 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
17317 | break; | |
17318 | } | |
9aa1fe7e | 17319 | |
debd256d | 17320 | if (op_code >= lh->opcode_base) |
6e70227d | 17321 | { |
8e07a239 | 17322 | /* Special opcode. */ |
699ca60a | 17323 | unsigned char adj_opcode; |
a05a36a5 | 17324 | int line_delta; |
8e07a239 | 17325 | |
debd256d | 17326 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
17327 | address += (((op_index + (adj_opcode / lh->line_range)) |
17328 | / lh->maximum_ops_per_instruction) | |
17329 | * lh->minimum_instruction_length); | |
17330 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
17331 | % lh->maximum_ops_per_instruction); | |
a05a36a5 DE |
17332 | line_delta = lh->line_base + (adj_opcode % lh->line_range); |
17333 | line += line_delta; | |
17334 | if (line_delta != 0) | |
17335 | line_has_non_zero_discriminator = discriminator != 0; | |
59205f5a | 17336 | if (lh->num_file_names < file || file == 0) |
25e43795 | 17337 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
17338 | /* For now we ignore lines not starting on an |
17339 | instruction boundary. */ | |
17340 | else if (op_index == 0) | |
25e43795 DJ |
17341 | { |
17342 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 17343 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
17344 | { |
17345 | if (last_subfile != current_subfile) | |
17346 | { | |
252a6764 DE |
17347 | dwarf_finish_line (gdbarch, last_subfile, |
17348 | address, p_record_line); | |
fbf65064 | 17349 | } |
a05a36a5 DE |
17350 | if (dwarf_record_line_p (line, last_line, |
17351 | line_has_non_zero_discriminator, | |
17352 | last_subfile)) | |
17353 | { | |
17354 | dwarf_record_line (gdbarch, current_subfile, | |
17355 | line, address, p_record_line); | |
17356 | } | |
17357 | last_subfile = current_subfile; | |
17358 | last_line = line; | |
366da635 | 17359 | } |
25e43795 | 17360 | } |
a05a36a5 | 17361 | discriminator = 0; |
9aa1fe7e GK |
17362 | } |
17363 | else switch (op_code) | |
c906108c SS |
17364 | { |
17365 | case DW_LNS_extended_op: | |
3e43a32a MS |
17366 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
17367 | &bytes_read); | |
473b7be6 | 17368 | line_ptr += bytes_read; |
a8c50c1f | 17369 | extended_end = line_ptr + extended_len; |
c906108c SS |
17370 | extended_op = read_1_byte (abfd, line_ptr); |
17371 | line_ptr += 1; | |
17372 | switch (extended_op) | |
17373 | { | |
17374 | case DW_LNE_end_sequence: | |
c91513d8 | 17375 | p_record_line = record_line; |
c906108c | 17376 | end_sequence = 1; |
c906108c SS |
17377 | break; |
17378 | case DW_LNE_set_address: | |
e7c27a73 | 17379 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 | 17380 | |
c3b7b696 YQ |
17381 | /* If address < lowpc then it's not a usable value, it's |
17382 | outside the pc range of the CU. However, we restrict | |
17383 | the test to only address values of zero to preserve | |
17384 | GDB's previous behaviour which is to handle the specific | |
17385 | case of a function being GC'd by the linker. */ | |
17386 | if (address == 0 && address < lowpc) | |
c91513d8 PP |
17387 | { |
17388 | /* This line table is for a function which has been | |
17389 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
17390 | ||
17391 | long line_offset | |
36586728 | 17392 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
17393 | |
17394 | complaint (&symfile_complaints, | |
17395 | _(".debug_line address at offset 0x%lx is 0 " | |
17396 | "[in module %s]"), | |
4262abfb | 17397 | line_offset, objfile_name (objfile)); |
c91513d8 | 17398 | p_record_line = noop_record_line; |
37780ee5 DE |
17399 | /* Note: p_record_line is left as noop_record_line |
17400 | until we see DW_LNE_end_sequence. */ | |
c91513d8 PP |
17401 | } |
17402 | ||
2dc7f7b3 | 17403 | op_index = 0; |
107d2387 AC |
17404 | line_ptr += bytes_read; |
17405 | address += baseaddr; | |
c906108c SS |
17406 | break; |
17407 | case DW_LNE_define_file: | |
debd256d | 17408 | { |
d521ce57 | 17409 | const char *cur_file; |
debd256d | 17410 | unsigned int dir_index, mod_time, length; |
6e70227d | 17411 | |
3e43a32a MS |
17412 | cur_file = read_direct_string (abfd, line_ptr, |
17413 | &bytes_read); | |
debd256d JB |
17414 | line_ptr += bytes_read; |
17415 | dir_index = | |
17416 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17417 | line_ptr += bytes_read; | |
17418 | mod_time = | |
17419 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17420 | line_ptr += bytes_read; | |
17421 | length = | |
17422 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17423 | line_ptr += bytes_read; | |
17424 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17425 | } | |
c906108c | 17426 | break; |
d0c6ba3d CC |
17427 | case DW_LNE_set_discriminator: |
17428 | /* The discriminator is not interesting to the debugger; | |
a05a36a5 DE |
17429 | just ignore it. We still need to check its value though: |
17430 | if there are consecutive entries for the same | |
17431 | (non-prologue) line we want to coalesce them. | |
17432 | PR 17276. */ | |
17433 | discriminator = read_unsigned_leb128 (abfd, line_ptr, | |
17434 | &bytes_read); | |
17435 | line_has_non_zero_discriminator |= discriminator != 0; | |
17436 | line_ptr += bytes_read; | |
d0c6ba3d | 17437 | break; |
c906108c | 17438 | default: |
4d3c2250 | 17439 | complaint (&symfile_complaints, |
e2e0b3e5 | 17440 | _("mangled .debug_line section")); |
debd256d | 17441 | return; |
c906108c | 17442 | } |
a8c50c1f DJ |
17443 | /* Make sure that we parsed the extended op correctly. If e.g. |
17444 | we expected a different address size than the producer used, | |
17445 | we may have read the wrong number of bytes. */ | |
17446 | if (line_ptr != extended_end) | |
17447 | { | |
17448 | complaint (&symfile_complaints, | |
17449 | _("mangled .debug_line section")); | |
17450 | return; | |
17451 | } | |
c906108c SS |
17452 | break; |
17453 | case DW_LNS_copy: | |
59205f5a | 17454 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
17455 | dwarf2_debug_line_missing_file_complaint (); |
17456 | else | |
366da635 | 17457 | { |
25e43795 | 17458 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 17459 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
17460 | { |
17461 | if (last_subfile != current_subfile) | |
17462 | { | |
252a6764 DE |
17463 | dwarf_finish_line (gdbarch, last_subfile, |
17464 | address, p_record_line); | |
fbf65064 | 17465 | } |
a05a36a5 DE |
17466 | if (dwarf_record_line_p (line, last_line, |
17467 | line_has_non_zero_discriminator, | |
17468 | last_subfile)) | |
17469 | { | |
17470 | dwarf_record_line (gdbarch, current_subfile, | |
17471 | line, address, p_record_line); | |
17472 | } | |
17473 | last_subfile = current_subfile; | |
17474 | last_line = line; | |
fbf65064 | 17475 | } |
366da635 | 17476 | } |
a05a36a5 | 17477 | discriminator = 0; |
c906108c SS |
17478 | break; |
17479 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
17480 | { |
17481 | CORE_ADDR adjust | |
17482 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17483 | ||
17484 | address += (((op_index + adjust) | |
17485 | / lh->maximum_ops_per_instruction) | |
17486 | * lh->minimum_instruction_length); | |
17487 | op_index = ((op_index + adjust) | |
17488 | % lh->maximum_ops_per_instruction); | |
17489 | line_ptr += bytes_read; | |
17490 | } | |
c906108c SS |
17491 | break; |
17492 | case DW_LNS_advance_line: | |
a05a36a5 DE |
17493 | { |
17494 | int line_delta | |
17495 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
17496 | ||
17497 | line += line_delta; | |
17498 | if (line_delta != 0) | |
17499 | line_has_non_zero_discriminator = discriminator != 0; | |
17500 | line_ptr += bytes_read; | |
17501 | } | |
c906108c SS |
17502 | break; |
17503 | case DW_LNS_set_file: | |
debd256d | 17504 | { |
a738430d MK |
17505 | /* The arrays lh->include_dirs and lh->file_names are |
17506 | 0-based, but the directory and file name numbers in | |
17507 | the statement program are 1-based. */ | |
debd256d | 17508 | struct file_entry *fe; |
d521ce57 | 17509 | const char *dir = NULL; |
a738430d | 17510 | |
debd256d JB |
17511 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
17512 | line_ptr += bytes_read; | |
59205f5a | 17513 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
17514 | dwarf2_debug_line_missing_file_complaint (); |
17515 | else | |
17516 | { | |
17517 | fe = &lh->file_names[file - 1]; | |
17518 | if (fe->dir_index) | |
17519 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17520 | if (!decode_for_pst_p) | |
17521 | { | |
17522 | last_subfile = current_subfile; | |
a05a36a5 | 17523 | line_has_non_zero_discriminator = discriminator != 0; |
25e43795 DJ |
17524 | dwarf2_start_subfile (fe->name, dir, comp_dir); |
17525 | } | |
17526 | } | |
debd256d | 17527 | } |
c906108c SS |
17528 | break; |
17529 | case DW_LNS_set_column: | |
0ad93d4f | 17530 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
17531 | line_ptr += bytes_read; |
17532 | break; | |
17533 | case DW_LNS_negate_stmt: | |
17534 | is_stmt = (!is_stmt); | |
17535 | break; | |
17536 | case DW_LNS_set_basic_block: | |
c906108c | 17537 | break; |
c2c6d25f JM |
17538 | /* Add to the address register of the state machine the |
17539 | address increment value corresponding to special opcode | |
a738430d MK |
17540 | 255. I.e., this value is scaled by the minimum |
17541 | instruction length since special opcode 255 would have | |
b021a221 | 17542 | scaled the increment. */ |
c906108c | 17543 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
17544 | { |
17545 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
17546 | ||
17547 | address += (((op_index + adjust) | |
17548 | / lh->maximum_ops_per_instruction) | |
17549 | * lh->minimum_instruction_length); | |
17550 | op_index = ((op_index + adjust) | |
17551 | % lh->maximum_ops_per_instruction); | |
17552 | } | |
c906108c SS |
17553 | break; |
17554 | case DW_LNS_fixed_advance_pc: | |
17555 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 17556 | op_index = 0; |
c906108c SS |
17557 | line_ptr += 2; |
17558 | break; | |
9aa1fe7e | 17559 | default: |
a738430d MK |
17560 | { |
17561 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 17562 | int i; |
a738430d | 17563 | |
debd256d | 17564 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
17565 | { |
17566 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17567 | line_ptr += bytes_read; | |
17568 | } | |
17569 | } | |
c906108c SS |
17570 | } |
17571 | } | |
59205f5a JB |
17572 | if (lh->num_file_names < file || file == 0) |
17573 | dwarf2_debug_line_missing_file_complaint (); | |
17574 | else | |
17575 | { | |
17576 | lh->file_names[file - 1].included_p = 1; | |
17577 | if (!decode_for_pst_p) | |
fbf65064 | 17578 | { |
252a6764 DE |
17579 | dwarf_finish_line (gdbarch, current_subfile, address, |
17580 | p_record_line); | |
fbf65064 | 17581 | } |
59205f5a | 17582 | } |
c906108c | 17583 | } |
f3f5162e DE |
17584 | } |
17585 | ||
17586 | /* Decode the Line Number Program (LNP) for the given line_header | |
17587 | structure and CU. The actual information extracted and the type | |
17588 | of structures created from the LNP depends on the value of PST. | |
17589 | ||
17590 | 1. If PST is NULL, then this procedure uses the data from the program | |
17591 | to create all necessary symbol tables, and their linetables. | |
17592 | ||
17593 | 2. If PST is not NULL, this procedure reads the program to determine | |
17594 | the list of files included by the unit represented by PST, and | |
17595 | builds all the associated partial symbol tables. | |
17596 | ||
17597 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17598 | It is used for relative paths in the line table. | |
17599 | NOTE: When processing partial symtabs (pst != NULL), | |
17600 | comp_dir == pst->dirname. | |
17601 | ||
17602 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
17603 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
17604 | symtab we don't use it in the name of the psymtabs we create. | |
17605 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
17606 | A good testcase for this is mb-inline.exp. |
17607 | ||
17608 | LOWPC is the lowest address in CU (or 0 if not known). */ | |
f3f5162e DE |
17609 | |
17610 | static void | |
17611 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 YQ |
17612 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
17613 | CORE_ADDR lowpc) | |
f3f5162e DE |
17614 | { |
17615 | struct objfile *objfile = cu->objfile; | |
17616 | const int decode_for_pst_p = (pst != NULL); | |
17617 | struct subfile *first_subfile = current_subfile; | |
17618 | ||
c3b7b696 | 17619 | dwarf_decode_lines_1 (lh, comp_dir, cu, decode_for_pst_p, lowpc); |
aaa75496 JB |
17620 | |
17621 | if (decode_for_pst_p) | |
17622 | { | |
17623 | int file_index; | |
17624 | ||
17625 | /* Now that we're done scanning the Line Header Program, we can | |
17626 | create the psymtab of each included file. */ | |
17627 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
17628 | if (lh->file_names[file_index].included_p == 1) | |
17629 | { | |
d521ce57 | 17630 | const char *include_name = |
c6da4cef DE |
17631 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
17632 | if (include_name != NULL) | |
aaa75496 JB |
17633 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
17634 | } | |
17635 | } | |
cb1df416 DJ |
17636 | else |
17637 | { | |
17638 | /* Make sure a symtab is created for every file, even files | |
17639 | which contain only variables (i.e. no code with associated | |
17640 | line numbers). */ | |
cb1df416 | 17641 | int i; |
cb1df416 DJ |
17642 | |
17643 | for (i = 0; i < lh->num_file_names; i++) | |
17644 | { | |
d521ce57 | 17645 | const char *dir = NULL; |
f3f5162e | 17646 | struct file_entry *fe; |
9a619af0 | 17647 | |
cb1df416 DJ |
17648 | fe = &lh->file_names[i]; |
17649 | if (fe->dir_index) | |
17650 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17651 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
17652 | ||
17653 | /* Skip the main file; we don't need it, and it must be | |
17654 | allocated last, so that it will show up before the | |
17655 | non-primary symtabs in the objfile's symtab list. */ | |
17656 | if (current_subfile == first_subfile) | |
17657 | continue; | |
17658 | ||
17659 | if (current_subfile->symtab == NULL) | |
17660 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 17661 | objfile); |
cb1df416 DJ |
17662 | fe->symtab = current_subfile->symtab; |
17663 | } | |
17664 | } | |
c906108c SS |
17665 | } |
17666 | ||
17667 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
17668 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
17669 | or NULL if not known. COMP_DIR is the compilation directory for the |
17670 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
17671 | This routine tries to keep line numbers from identical absolute and |
17672 | relative file names in a common subfile. | |
17673 | ||
17674 | Using the `list' example from the GDB testsuite, which resides in | |
17675 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
17676 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
17677 | ||
c5aa993b JM |
17678 | DW_AT_name: /srcdir/list0.c |
17679 | DW_AT_comp_dir: /compdir | |
357e46e7 | 17680 | files.files[0].name: list0.h |
c5aa993b | 17681 | files.files[0].dir: /srcdir |
357e46e7 | 17682 | files.files[1].name: list0.c |
c5aa993b | 17683 | files.files[1].dir: /srcdir |
c906108c SS |
17684 | |
17685 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
17686 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
17687 | start_subfile will ensure that this happens provided that we pass the | |
17688 | concatenation of files.files[1].dir and files.files[1].name as the | |
17689 | subfile's name. */ | |
c906108c SS |
17690 | |
17691 | static void | |
d521ce57 | 17692 | dwarf2_start_subfile (const char *filename, const char *dirname, |
3e43a32a | 17693 | const char *comp_dir) |
c906108c | 17694 | { |
d521ce57 | 17695 | char *copy = NULL; |
4f1520fb FR |
17696 | |
17697 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
17698 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
17699 | second argument to start_subfile. To be consistent, we do the | |
17700 | same here. In order not to lose the line information directory, | |
17701 | we concatenate it to the filename when it makes sense. | |
17702 | Note that the Dwarf3 standard says (speaking of filenames in line | |
17703 | information): ``The directory index is ignored for file names | |
17704 | that represent full path names''. Thus ignoring dirname in the | |
17705 | `else' branch below isn't an issue. */ | |
c906108c | 17706 | |
d5166ae1 | 17707 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
17708 | { |
17709 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
17710 | filename = copy; | |
17711 | } | |
c906108c | 17712 | |
d521ce57 | 17713 | start_subfile (filename, comp_dir); |
4f1520fb | 17714 | |
d521ce57 TT |
17715 | if (copy != NULL) |
17716 | xfree (copy); | |
c906108c SS |
17717 | } |
17718 | ||
f4dc4d17 DE |
17719 | /* Start a symtab for DWARF. |
17720 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
17721 | ||
17722 | static void | |
17723 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15d034d0 | 17724 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 DE |
17725 | { |
17726 | start_symtab (name, comp_dir, low_pc); | |
17727 | record_debugformat ("DWARF 2"); | |
17728 | record_producer (cu->producer); | |
17729 | ||
17730 | /* We assume that we're processing GCC output. */ | |
17731 | processing_gcc_compilation = 2; | |
17732 | ||
4d4ec4e5 | 17733 | cu->processing_has_namespace_info = 0; |
f4dc4d17 DE |
17734 | } |
17735 | ||
4c2df51b DJ |
17736 | static void |
17737 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 17738 | struct dwarf2_cu *cu) |
4c2df51b | 17739 | { |
e7c27a73 DJ |
17740 | struct objfile *objfile = cu->objfile; |
17741 | struct comp_unit_head *cu_header = &cu->header; | |
17742 | ||
4c2df51b DJ |
17743 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
17744 | code here to turn a symbol with DW_AT_external and a | |
17745 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
17746 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
17747 | with some versions of binutils) where shared libraries could have | |
17748 | relocations against symbols in their debug information - the | |
17749 | minimal symbol would have the right address, but the debug info | |
17750 | would not. It's no longer necessary, because we will explicitly | |
17751 | apply relocations when we read in the debug information now. */ | |
17752 | ||
17753 | /* A DW_AT_location attribute with no contents indicates that a | |
17754 | variable has been optimized away. */ | |
17755 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
17756 | { | |
f1e6e072 | 17757 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
17758 | return; |
17759 | } | |
17760 | ||
17761 | /* Handle one degenerate form of location expression specially, to | |
17762 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
17763 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
17764 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
17765 | |
17766 | if (attr_form_is_block (attr) | |
3019eac3 DE |
17767 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
17768 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
17769 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
17770 | && (DW_BLOCK (attr)->size | |
17771 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 17772 | { |
891d2f0b | 17773 | unsigned int dummy; |
4c2df51b | 17774 | |
3019eac3 DE |
17775 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
17776 | SYMBOL_VALUE_ADDRESS (sym) = | |
17777 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
17778 | else | |
17779 | SYMBOL_VALUE_ADDRESS (sym) = | |
17780 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 17781 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
17782 | fixup_symbol_section (sym, objfile); |
17783 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
17784 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
17785 | return; |
17786 | } | |
17787 | ||
17788 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
17789 | expression evaluator, and use LOC_COMPUTED only when necessary | |
17790 | (i.e. when the value of a register or memory location is | |
17791 | referenced, or a thread-local block, etc.). Then again, it might | |
17792 | not be worthwhile. I'm assuming that it isn't unless performance | |
17793 | or memory numbers show me otherwise. */ | |
17794 | ||
f1e6e072 | 17795 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 17796 | |
f1e6e072 | 17797 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 17798 | cu->has_loclist = 1; |
4c2df51b DJ |
17799 | } |
17800 | ||
c906108c SS |
17801 | /* Given a pointer to a DWARF information entry, figure out if we need |
17802 | to make a symbol table entry for it, and if so, create a new entry | |
17803 | and return a pointer to it. | |
17804 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
17805 | used the passed type. |
17806 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
17807 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
17808 | |
17809 | static struct symbol * | |
34eaf542 TT |
17810 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
17811 | struct symbol *space) | |
c906108c | 17812 | { |
e7c27a73 | 17813 | struct objfile *objfile = cu->objfile; |
c906108c | 17814 | struct symbol *sym = NULL; |
15d034d0 | 17815 | const char *name; |
c906108c SS |
17816 | struct attribute *attr = NULL; |
17817 | struct attribute *attr2 = NULL; | |
e142c38c | 17818 | CORE_ADDR baseaddr; |
e37fd15a SW |
17819 | struct pending **list_to_add = NULL; |
17820 | ||
edb3359d | 17821 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
17822 | |
17823 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17824 | |
94af9270 | 17825 | name = dwarf2_name (die, cu); |
c906108c SS |
17826 | if (name) |
17827 | { | |
94af9270 | 17828 | const char *linkagename; |
34eaf542 | 17829 | int suppress_add = 0; |
94af9270 | 17830 | |
34eaf542 TT |
17831 | if (space) |
17832 | sym = space; | |
17833 | else | |
e623cf5d | 17834 | sym = allocate_symbol (objfile); |
c906108c | 17835 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
17836 | |
17837 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 17838 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
17839 | linkagename = dwarf2_physname (name, die, cu); |
17840 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 17841 | |
f55ee35c JK |
17842 | /* Fortran does not have mangling standard and the mangling does differ |
17843 | between gfortran, iFort etc. */ | |
17844 | if (cu->language == language_fortran | |
b250c185 | 17845 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 17846 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 17847 | dwarf2_full_name (name, die, cu), |
29df156d | 17848 | NULL); |
f55ee35c | 17849 | |
c906108c | 17850 | /* Default assumptions. |
c5aa993b | 17851 | Use the passed type or decode it from the die. */ |
176620f1 | 17852 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 17853 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
17854 | if (type != NULL) |
17855 | SYMBOL_TYPE (sym) = type; | |
17856 | else | |
e7c27a73 | 17857 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
17858 | attr = dwarf2_attr (die, |
17859 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
17860 | cu); | |
c906108c SS |
17861 | if (attr) |
17862 | { | |
17863 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
17864 | } | |
cb1df416 | 17865 | |
edb3359d DJ |
17866 | attr = dwarf2_attr (die, |
17867 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
17868 | cu); | |
cb1df416 DJ |
17869 | if (attr) |
17870 | { | |
17871 | int file_index = DW_UNSND (attr); | |
9a619af0 | 17872 | |
cb1df416 DJ |
17873 | if (cu->line_header == NULL |
17874 | || file_index > cu->line_header->num_file_names) | |
17875 | complaint (&symfile_complaints, | |
17876 | _("file index out of range")); | |
1c3d648d | 17877 | else if (file_index > 0) |
cb1df416 DJ |
17878 | { |
17879 | struct file_entry *fe; | |
9a619af0 | 17880 | |
cb1df416 DJ |
17881 | fe = &cu->line_header->file_names[file_index - 1]; |
17882 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
17883 | } | |
17884 | } | |
17885 | ||
c906108c SS |
17886 | switch (die->tag) |
17887 | { | |
17888 | case DW_TAG_label: | |
e142c38c | 17889 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 17890 | if (attr) |
31aa7e4e JB |
17891 | SYMBOL_VALUE_ADDRESS (sym) |
17892 | = attr_value_as_address (attr) + baseaddr; | |
0f5238ed TT |
17893 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
17894 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 17895 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 17896 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
17897 | break; |
17898 | case DW_TAG_subprogram: | |
17899 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
17900 | finish_block. */ | |
f1e6e072 | 17901 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 17902 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
17903 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
17904 | || cu->language == language_ada) | |
c906108c | 17905 | { |
2cfa0c8d JB |
17906 | /* Subprograms marked external are stored as a global symbol. |
17907 | Ada subprograms, whether marked external or not, are always | |
17908 | stored as a global symbol, because we want to be able to | |
17909 | access them globally. For instance, we want to be able | |
17910 | to break on a nested subprogram without having to | |
17911 | specify the context. */ | |
e37fd15a | 17912 | list_to_add = &global_symbols; |
c906108c SS |
17913 | } |
17914 | else | |
17915 | { | |
e37fd15a | 17916 | list_to_add = cu->list_in_scope; |
c906108c SS |
17917 | } |
17918 | break; | |
edb3359d DJ |
17919 | case DW_TAG_inlined_subroutine: |
17920 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
17921 | finish_block. */ | |
f1e6e072 | 17922 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 17923 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 17924 | list_to_add = cu->list_in_scope; |
edb3359d | 17925 | break; |
34eaf542 TT |
17926 | case DW_TAG_template_value_param: |
17927 | suppress_add = 1; | |
17928 | /* Fall through. */ | |
72929c62 | 17929 | case DW_TAG_constant: |
c906108c | 17930 | case DW_TAG_variable: |
254e6b9e | 17931 | case DW_TAG_member: |
0963b4bd MS |
17932 | /* Compilation with minimal debug info may result in |
17933 | variables with missing type entries. Change the | |
17934 | misleading `void' type to something sensible. */ | |
c906108c | 17935 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 17936 | SYMBOL_TYPE (sym) |
46bf5051 | 17937 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 17938 | |
e142c38c | 17939 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
17940 | /* In the case of DW_TAG_member, we should only be called for |
17941 | static const members. */ | |
17942 | if (die->tag == DW_TAG_member) | |
17943 | { | |
3863f96c DE |
17944 | /* dwarf2_add_field uses die_is_declaration, |
17945 | so we do the same. */ | |
254e6b9e DE |
17946 | gdb_assert (die_is_declaration (die, cu)); |
17947 | gdb_assert (attr); | |
17948 | } | |
c906108c SS |
17949 | if (attr) |
17950 | { | |
e7c27a73 | 17951 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 17952 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 17953 | if (!suppress_add) |
34eaf542 TT |
17954 | { |
17955 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 17956 | list_to_add = &global_symbols; |
34eaf542 | 17957 | else |
e37fd15a | 17958 | list_to_add = cu->list_in_scope; |
34eaf542 | 17959 | } |
c906108c SS |
17960 | break; |
17961 | } | |
e142c38c | 17962 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
17963 | if (attr) |
17964 | { | |
e7c27a73 | 17965 | var_decode_location (attr, sym, cu); |
e142c38c | 17966 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
17967 | |
17968 | /* Fortran explicitly imports any global symbols to the local | |
17969 | scope by DW_TAG_common_block. */ | |
17970 | if (cu->language == language_fortran && die->parent | |
17971 | && die->parent->tag == DW_TAG_common_block) | |
17972 | attr2 = NULL; | |
17973 | ||
caac4577 JG |
17974 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
17975 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
17976 | && !dwarf2_per_objfile->has_section_at_zero) | |
17977 | { | |
17978 | /* When a static variable is eliminated by the linker, | |
17979 | the corresponding debug information is not stripped | |
17980 | out, but the variable address is set to null; | |
17981 | do not add such variables into symbol table. */ | |
17982 | } | |
17983 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 17984 | { |
f55ee35c JK |
17985 | /* Workaround gfortran PR debug/40040 - it uses |
17986 | DW_AT_location for variables in -fPIC libraries which may | |
17987 | get overriden by other libraries/executable and get | |
17988 | a different address. Resolve it by the minimal symbol | |
17989 | which may come from inferior's executable using copy | |
17990 | relocation. Make this workaround only for gfortran as for | |
17991 | other compilers GDB cannot guess the minimal symbol | |
17992 | Fortran mangling kind. */ | |
17993 | if (cu->language == language_fortran && die->parent | |
17994 | && die->parent->tag == DW_TAG_module | |
17995 | && cu->producer | |
17996 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
f1e6e072 | 17997 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 17998 | |
1c809c68 TT |
17999 | /* A variable with DW_AT_external is never static, |
18000 | but it may be block-scoped. */ | |
18001 | list_to_add = (cu->list_in_scope == &file_symbols | |
18002 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 18003 | } |
c906108c | 18004 | else |
e37fd15a | 18005 | list_to_add = cu->list_in_scope; |
c906108c SS |
18006 | } |
18007 | else | |
18008 | { | |
18009 | /* We do not know the address of this symbol. | |
c5aa993b JM |
18010 | If it is an external symbol and we have type information |
18011 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
18012 | The address of the variable will then be determined from | |
18013 | the minimal symbol table whenever the variable is | |
18014 | referenced. */ | |
e142c38c | 18015 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
18016 | |
18017 | /* Fortran explicitly imports any global symbols to the local | |
18018 | scope by DW_TAG_common_block. */ | |
18019 | if (cu->language == language_fortran && die->parent | |
18020 | && die->parent->tag == DW_TAG_common_block) | |
18021 | { | |
18022 | /* SYMBOL_CLASS doesn't matter here because | |
18023 | read_common_block is going to reset it. */ | |
18024 | if (!suppress_add) | |
18025 | list_to_add = cu->list_in_scope; | |
18026 | } | |
18027 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
18028 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 18029 | { |
0fe7935b DJ |
18030 | /* A variable with DW_AT_external is never static, but it |
18031 | may be block-scoped. */ | |
18032 | list_to_add = (cu->list_in_scope == &file_symbols | |
18033 | ? &global_symbols : cu->list_in_scope); | |
18034 | ||
f1e6e072 | 18035 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 18036 | } |
442ddf59 JK |
18037 | else if (!die_is_declaration (die, cu)) |
18038 | { | |
18039 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
18040 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
18041 | if (!suppress_add) |
18042 | list_to_add = cu->list_in_scope; | |
442ddf59 | 18043 | } |
c906108c SS |
18044 | } |
18045 | break; | |
18046 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
18047 | /* If we are inside a function, mark this as an argument. If |
18048 | not, we might be looking at an argument to an inlined function | |
18049 | when we do not have enough information to show inlined frames; | |
18050 | pretend it's a local variable in that case so that the user can | |
18051 | still see it. */ | |
18052 | if (context_stack_depth > 0 | |
18053 | && context_stack[context_stack_depth - 1].name != NULL) | |
18054 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 18055 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
18056 | if (attr) |
18057 | { | |
e7c27a73 | 18058 | var_decode_location (attr, sym, cu); |
c906108c | 18059 | } |
e142c38c | 18060 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18061 | if (attr) |
18062 | { | |
e7c27a73 | 18063 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18064 | } |
f346a30d | 18065 | |
e37fd15a | 18066 | list_to_add = cu->list_in_scope; |
c906108c SS |
18067 | break; |
18068 | case DW_TAG_unspecified_parameters: | |
18069 | /* From varargs functions; gdb doesn't seem to have any | |
18070 | interest in this information, so just ignore it for now. | |
18071 | (FIXME?) */ | |
18072 | break; | |
34eaf542 TT |
18073 | case DW_TAG_template_type_param: |
18074 | suppress_add = 1; | |
18075 | /* Fall through. */ | |
c906108c | 18076 | case DW_TAG_class_type: |
680b30c7 | 18077 | case DW_TAG_interface_type: |
c906108c SS |
18078 | case DW_TAG_structure_type: |
18079 | case DW_TAG_union_type: | |
72019c9c | 18080 | case DW_TAG_set_type: |
c906108c | 18081 | case DW_TAG_enumeration_type: |
f1e6e072 | 18082 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18083 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 18084 | |
63d06c5c | 18085 | { |
987504bb | 18086 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
18087 | really ever be static objects: otherwise, if you try |
18088 | to, say, break of a class's method and you're in a file | |
18089 | which doesn't mention that class, it won't work unless | |
18090 | the check for all static symbols in lookup_symbol_aux | |
18091 | saves you. See the OtherFileClass tests in | |
18092 | gdb.c++/namespace.exp. */ | |
18093 | ||
e37fd15a | 18094 | if (!suppress_add) |
34eaf542 | 18095 | { |
34eaf542 TT |
18096 | list_to_add = (cu->list_in_scope == &file_symbols |
18097 | && (cu->language == language_cplus | |
18098 | || cu->language == language_java) | |
18099 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 18100 | |
64382290 TT |
18101 | /* The semantics of C++ state that "struct foo { |
18102 | ... }" also defines a typedef for "foo". A Java | |
18103 | class declaration also defines a typedef for the | |
18104 | class. */ | |
18105 | if (cu->language == language_cplus | |
18106 | || cu->language == language_java | |
18107 | || cu->language == language_ada) | |
18108 | { | |
18109 | /* The symbol's name is already allocated along | |
18110 | with this objfile, so we don't need to | |
18111 | duplicate it for the type. */ | |
18112 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
18113 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
18114 | } | |
63d06c5c DC |
18115 | } |
18116 | } | |
c906108c SS |
18117 | break; |
18118 | case DW_TAG_typedef: | |
f1e6e072 | 18119 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 18120 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 18121 | list_to_add = cu->list_in_scope; |
63d06c5c | 18122 | break; |
c906108c | 18123 | case DW_TAG_base_type: |
a02abb62 | 18124 | case DW_TAG_subrange_type: |
f1e6e072 | 18125 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 18126 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 18127 | list_to_add = cu->list_in_scope; |
c906108c SS |
18128 | break; |
18129 | case DW_TAG_enumerator: | |
e142c38c | 18130 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
18131 | if (attr) |
18132 | { | |
e7c27a73 | 18133 | dwarf2_const_value (attr, sym, cu); |
c906108c | 18134 | } |
63d06c5c DC |
18135 | { |
18136 | /* NOTE: carlton/2003-11-10: See comment above in the | |
18137 | DW_TAG_class_type, etc. block. */ | |
18138 | ||
e142c38c | 18139 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
18140 | && (cu->language == language_cplus |
18141 | || cu->language == language_java) | |
e142c38c | 18142 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 18143 | } |
c906108c | 18144 | break; |
74921315 | 18145 | case DW_TAG_imported_declaration: |
5c4e30ca | 18146 | case DW_TAG_namespace: |
f1e6e072 | 18147 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 18148 | list_to_add = &global_symbols; |
5c4e30ca | 18149 | break; |
530e8392 KB |
18150 | case DW_TAG_module: |
18151 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
18152 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
18153 | list_to_add = &global_symbols; | |
18154 | break; | |
4357ac6c | 18155 | case DW_TAG_common_block: |
f1e6e072 | 18156 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
18157 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
18158 | add_symbol_to_list (sym, cu->list_in_scope); | |
18159 | break; | |
c906108c SS |
18160 | default: |
18161 | /* Not a tag we recognize. Hopefully we aren't processing | |
18162 | trash data, but since we must specifically ignore things | |
18163 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 18164 | this point. */ |
e2e0b3e5 | 18165 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 18166 | dwarf_tag_name (die->tag)); |
c906108c SS |
18167 | break; |
18168 | } | |
df8a16a1 | 18169 | |
e37fd15a SW |
18170 | if (suppress_add) |
18171 | { | |
18172 | sym->hash_next = objfile->template_symbols; | |
18173 | objfile->template_symbols = sym; | |
18174 | list_to_add = NULL; | |
18175 | } | |
18176 | ||
18177 | if (list_to_add != NULL) | |
18178 | add_symbol_to_list (sym, list_to_add); | |
18179 | ||
df8a16a1 DJ |
18180 | /* For the benefit of old versions of GCC, check for anonymous |
18181 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 18182 | if (!cu->processing_has_namespace_info |
94af9270 | 18183 | && cu->language == language_cplus) |
a10964d1 | 18184 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
18185 | } |
18186 | return (sym); | |
18187 | } | |
18188 | ||
34eaf542 TT |
18189 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
18190 | ||
18191 | static struct symbol * | |
18192 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
18193 | { | |
18194 | return new_symbol_full (die, type, cu, NULL); | |
18195 | } | |
18196 | ||
98bfdba5 PA |
18197 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
18198 | zero-extend it as appropriate for the symbol's type. The DWARF | |
18199 | standard (v4) is not entirely clear about the meaning of using | |
18200 | DW_FORM_dataN for a constant with a signed type, where the type is | |
18201 | wider than the data. The conclusion of a discussion on the DWARF | |
18202 | list was that this is unspecified. We choose to always zero-extend | |
18203 | because that is the interpretation long in use by GCC. */ | |
c906108c | 18204 | |
98bfdba5 | 18205 | static gdb_byte * |
ff39bb5e | 18206 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 18207 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 18208 | { |
e7c27a73 | 18209 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
18210 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
18211 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
18212 | LONGEST l = DW_UNSND (attr); |
18213 | ||
18214 | if (bits < sizeof (*value) * 8) | |
18215 | { | |
18216 | l &= ((LONGEST) 1 << bits) - 1; | |
18217 | *value = l; | |
18218 | } | |
18219 | else if (bits == sizeof (*value) * 8) | |
18220 | *value = l; | |
18221 | else | |
18222 | { | |
18223 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
18224 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
18225 | return bytes; | |
18226 | } | |
18227 | ||
18228 | return NULL; | |
18229 | } | |
18230 | ||
18231 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
18232 | the value does not fit in *VALUE, set *BYTES - either already | |
18233 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
18234 | or, set *BATON, if we translated the constant to a location | |
18235 | expression. */ | |
18236 | ||
18237 | static void | |
ff39bb5e | 18238 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
18239 | const char *name, struct obstack *obstack, |
18240 | struct dwarf2_cu *cu, | |
d521ce57 | 18241 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
18242 | struct dwarf2_locexpr_baton **baton) |
18243 | { | |
18244 | struct objfile *objfile = cu->objfile; | |
18245 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 18246 | struct dwarf_block *blk; |
98bfdba5 PA |
18247 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
18248 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
18249 | ||
18250 | *value = 0; | |
18251 | *bytes = NULL; | |
18252 | *baton = NULL; | |
c906108c SS |
18253 | |
18254 | switch (attr->form) | |
18255 | { | |
18256 | case DW_FORM_addr: | |
3019eac3 | 18257 | case DW_FORM_GNU_addr_index: |
ac56253d | 18258 | { |
ac56253d TT |
18259 | gdb_byte *data; |
18260 | ||
98bfdba5 PA |
18261 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
18262 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 18263 | cu_header->addr_size, |
98bfdba5 | 18264 | TYPE_LENGTH (type)); |
ac56253d TT |
18265 | /* Symbols of this form are reasonably rare, so we just |
18266 | piggyback on the existing location code rather than writing | |
18267 | a new implementation of symbol_computed_ops. */ | |
7919a973 | 18268 | *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton)); |
98bfdba5 PA |
18269 | (*baton)->per_cu = cu->per_cu; |
18270 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 18271 | |
98bfdba5 | 18272 | (*baton)->size = 2 + cu_header->addr_size; |
7919a973 | 18273 | data = obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 18274 | (*baton)->data = data; |
ac56253d TT |
18275 | |
18276 | data[0] = DW_OP_addr; | |
18277 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
18278 | byte_order, DW_ADDR (attr)); | |
18279 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 18280 | } |
c906108c | 18281 | break; |
4ac36638 | 18282 | case DW_FORM_string: |
93b5768b | 18283 | case DW_FORM_strp: |
3019eac3 | 18284 | case DW_FORM_GNU_str_index: |
36586728 | 18285 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
18286 | /* DW_STRING is already allocated on the objfile obstack, point |
18287 | directly to it. */ | |
d521ce57 | 18288 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 18289 | break; |
c906108c SS |
18290 | case DW_FORM_block1: |
18291 | case DW_FORM_block2: | |
18292 | case DW_FORM_block4: | |
18293 | case DW_FORM_block: | |
2dc7f7b3 | 18294 | case DW_FORM_exprloc: |
c906108c | 18295 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
18296 | if (TYPE_LENGTH (type) != blk->size) |
18297 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
18298 | TYPE_LENGTH (type)); | |
18299 | *bytes = blk->data; | |
c906108c | 18300 | break; |
2df3850c JM |
18301 | |
18302 | /* The DW_AT_const_value attributes are supposed to carry the | |
18303 | symbol's value "represented as it would be on the target | |
18304 | architecture." By the time we get here, it's already been | |
18305 | converted to host endianness, so we just need to sign- or | |
18306 | zero-extend it as appropriate. */ | |
18307 | case DW_FORM_data1: | |
3aef2284 | 18308 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 18309 | break; |
c906108c | 18310 | case DW_FORM_data2: |
3aef2284 | 18311 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 18312 | break; |
c906108c | 18313 | case DW_FORM_data4: |
3aef2284 | 18314 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 18315 | break; |
c906108c | 18316 | case DW_FORM_data8: |
3aef2284 | 18317 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
18318 | break; |
18319 | ||
c906108c | 18320 | case DW_FORM_sdata: |
98bfdba5 | 18321 | *value = DW_SND (attr); |
2df3850c JM |
18322 | break; |
18323 | ||
c906108c | 18324 | case DW_FORM_udata: |
98bfdba5 | 18325 | *value = DW_UNSND (attr); |
c906108c | 18326 | break; |
2df3850c | 18327 | |
c906108c | 18328 | default: |
4d3c2250 | 18329 | complaint (&symfile_complaints, |
e2e0b3e5 | 18330 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 18331 | dwarf_form_name (attr->form)); |
98bfdba5 | 18332 | *value = 0; |
c906108c SS |
18333 | break; |
18334 | } | |
18335 | } | |
18336 | ||
2df3850c | 18337 | |
98bfdba5 PA |
18338 | /* Copy constant value from an attribute to a symbol. */ |
18339 | ||
2df3850c | 18340 | static void |
ff39bb5e | 18341 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 18342 | struct dwarf2_cu *cu) |
2df3850c | 18343 | { |
98bfdba5 PA |
18344 | struct objfile *objfile = cu->objfile; |
18345 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 18346 | LONGEST value; |
d521ce57 | 18347 | const gdb_byte *bytes; |
98bfdba5 | 18348 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 18349 | |
98bfdba5 PA |
18350 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
18351 | SYMBOL_PRINT_NAME (sym), | |
18352 | &objfile->objfile_obstack, cu, | |
18353 | &value, &bytes, &baton); | |
2df3850c | 18354 | |
98bfdba5 PA |
18355 | if (baton != NULL) |
18356 | { | |
98bfdba5 | 18357 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 18358 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
18359 | } |
18360 | else if (bytes != NULL) | |
18361 | { | |
18362 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 18363 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
18364 | } |
18365 | else | |
18366 | { | |
18367 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 18368 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 18369 | } |
2df3850c JM |
18370 | } |
18371 | ||
c906108c SS |
18372 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
18373 | ||
18374 | static struct type * | |
e7c27a73 | 18375 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18376 | { |
c906108c | 18377 | struct attribute *type_attr; |
c906108c | 18378 | |
e142c38c | 18379 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
18380 | if (!type_attr) |
18381 | { | |
18382 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 18383 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 18384 | } |
348e048f | 18385 | |
673bfd45 | 18386 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18387 | } |
18388 | ||
b4ba55a1 JB |
18389 | /* True iff CU's producer generates GNAT Ada auxiliary information |
18390 | that allows to find parallel types through that information instead | |
18391 | of having to do expensive parallel lookups by type name. */ | |
18392 | ||
18393 | static int | |
18394 | need_gnat_info (struct dwarf2_cu *cu) | |
18395 | { | |
18396 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
18397 | of GNAT produces this auxiliary information, without any indication | |
18398 | that it is produced. Part of enhancing the FSF version of GNAT | |
18399 | to produce that information will be to put in place an indicator | |
18400 | that we can use in order to determine whether the descriptive type | |
18401 | info is available or not. One suggestion that has been made is | |
18402 | to use a new attribute, attached to the CU die. For now, assume | |
18403 | that the descriptive type info is not available. */ | |
18404 | return 0; | |
18405 | } | |
18406 | ||
b4ba55a1 JB |
18407 | /* Return the auxiliary type of the die in question using its |
18408 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
18409 | attribute is not present. */ | |
18410 | ||
18411 | static struct type * | |
18412 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
18413 | { | |
b4ba55a1 | 18414 | struct attribute *type_attr; |
b4ba55a1 JB |
18415 | |
18416 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
18417 | if (!type_attr) | |
18418 | return NULL; | |
18419 | ||
673bfd45 | 18420 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
18421 | } |
18422 | ||
18423 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
18424 | descriptive type accordingly. */ | |
18425 | ||
18426 | static void | |
18427 | set_descriptive_type (struct type *type, struct die_info *die, | |
18428 | struct dwarf2_cu *cu) | |
18429 | { | |
18430 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
18431 | ||
18432 | if (descriptive_type) | |
18433 | { | |
18434 | ALLOCATE_GNAT_AUX_TYPE (type); | |
18435 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
18436 | } | |
18437 | } | |
18438 | ||
c906108c SS |
18439 | /* Return the containing type of the die in question using its |
18440 | DW_AT_containing_type attribute. */ | |
18441 | ||
18442 | static struct type * | |
e7c27a73 | 18443 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18444 | { |
c906108c | 18445 | struct attribute *type_attr; |
c906108c | 18446 | |
e142c38c | 18447 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
18448 | if (!type_attr) |
18449 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 18450 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 18451 | |
673bfd45 | 18452 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18453 | } |
18454 | ||
ac9ec31b DE |
18455 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
18456 | ||
18457 | static struct type * | |
18458 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
18459 | { | |
18460 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18461 | char *message, *saved; | |
18462 | ||
18463 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 18464 | objfile_name (objfile), |
ac9ec31b DE |
18465 | cu->header.offset.sect_off, |
18466 | die->offset.sect_off); | |
18467 | saved = obstack_copy0 (&objfile->objfile_obstack, | |
18468 | message, strlen (message)); | |
18469 | xfree (message); | |
18470 | ||
18471 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
18472 | } | |
18473 | ||
673bfd45 | 18474 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
18475 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
18476 | DW_AT_containing_type. | |
673bfd45 DE |
18477 | If there is no type substitute an error marker. */ |
18478 | ||
c906108c | 18479 | static struct type * |
ff39bb5e | 18480 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 18481 | struct dwarf2_cu *cu) |
c906108c | 18482 | { |
bb5ed363 | 18483 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
18484 | struct type *this_type; |
18485 | ||
ac9ec31b DE |
18486 | gdb_assert (attr->name == DW_AT_type |
18487 | || attr->name == DW_AT_GNAT_descriptive_type | |
18488 | || attr->name == DW_AT_containing_type); | |
18489 | ||
673bfd45 DE |
18490 | /* First see if we have it cached. */ |
18491 | ||
36586728 TT |
18492 | if (attr->form == DW_FORM_GNU_ref_alt) |
18493 | { | |
18494 | struct dwarf2_per_cu_data *per_cu; | |
18495 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
18496 | ||
18497 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
18498 | this_type = get_die_type_at_offset (offset, per_cu); | |
18499 | } | |
7771576e | 18500 | else if (attr_form_is_ref (attr)) |
673bfd45 | 18501 | { |
b64f50a1 | 18502 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
18503 | |
18504 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
18505 | } | |
55f1336d | 18506 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 18507 | { |
ac9ec31b | 18508 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 18509 | |
ac9ec31b | 18510 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
18511 | } |
18512 | else | |
18513 | { | |
ac9ec31b DE |
18514 | complaint (&symfile_complaints, |
18515 | _("Dwarf Error: Bad type attribute %s in DIE" | |
18516 | " at 0x%x [in module %s]"), | |
18517 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 18518 | objfile_name (objfile)); |
ac9ec31b | 18519 | return build_error_marker_type (cu, die); |
673bfd45 DE |
18520 | } |
18521 | ||
18522 | /* If not cached we need to read it in. */ | |
18523 | ||
18524 | if (this_type == NULL) | |
18525 | { | |
ac9ec31b | 18526 | struct die_info *type_die = NULL; |
673bfd45 DE |
18527 | struct dwarf2_cu *type_cu = cu; |
18528 | ||
7771576e | 18529 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
18530 | type_die = follow_die_ref (die, attr, &type_cu); |
18531 | if (type_die == NULL) | |
18532 | return build_error_marker_type (cu, die); | |
18533 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
18534 | from an inter-CU reference and the type's CU got expanded before |
18535 | ours. */ | |
ac9ec31b | 18536 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
18537 | } |
18538 | ||
18539 | /* If we still don't have a type use an error marker. */ | |
18540 | ||
18541 | if (this_type == NULL) | |
ac9ec31b | 18542 | return build_error_marker_type (cu, die); |
673bfd45 | 18543 | |
f792889a | 18544 | return this_type; |
c906108c SS |
18545 | } |
18546 | ||
673bfd45 DE |
18547 | /* Return the type in DIE, CU. |
18548 | Returns NULL for invalid types. | |
18549 | ||
02142a6c | 18550 | This first does a lookup in die_type_hash, |
673bfd45 DE |
18551 | and only reads the die in if necessary. |
18552 | ||
18553 | NOTE: This can be called when reading in partial or full symbols. */ | |
18554 | ||
f792889a | 18555 | static struct type * |
e7c27a73 | 18556 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18557 | { |
f792889a DJ |
18558 | struct type *this_type; |
18559 | ||
18560 | this_type = get_die_type (die, cu); | |
18561 | if (this_type) | |
18562 | return this_type; | |
18563 | ||
673bfd45 DE |
18564 | return read_type_die_1 (die, cu); |
18565 | } | |
18566 | ||
18567 | /* Read the type in DIE, CU. | |
18568 | Returns NULL for invalid types. */ | |
18569 | ||
18570 | static struct type * | |
18571 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
18572 | { | |
18573 | struct type *this_type = NULL; | |
18574 | ||
c906108c SS |
18575 | switch (die->tag) |
18576 | { | |
18577 | case DW_TAG_class_type: | |
680b30c7 | 18578 | case DW_TAG_interface_type: |
c906108c SS |
18579 | case DW_TAG_structure_type: |
18580 | case DW_TAG_union_type: | |
f792889a | 18581 | this_type = read_structure_type (die, cu); |
c906108c SS |
18582 | break; |
18583 | case DW_TAG_enumeration_type: | |
f792889a | 18584 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
18585 | break; |
18586 | case DW_TAG_subprogram: | |
18587 | case DW_TAG_subroutine_type: | |
edb3359d | 18588 | case DW_TAG_inlined_subroutine: |
f792889a | 18589 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
18590 | break; |
18591 | case DW_TAG_array_type: | |
f792889a | 18592 | this_type = read_array_type (die, cu); |
c906108c | 18593 | break; |
72019c9c | 18594 | case DW_TAG_set_type: |
f792889a | 18595 | this_type = read_set_type (die, cu); |
72019c9c | 18596 | break; |
c906108c | 18597 | case DW_TAG_pointer_type: |
f792889a | 18598 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
18599 | break; |
18600 | case DW_TAG_ptr_to_member_type: | |
f792889a | 18601 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
18602 | break; |
18603 | case DW_TAG_reference_type: | |
f792889a | 18604 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
18605 | break; |
18606 | case DW_TAG_const_type: | |
f792889a | 18607 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
18608 | break; |
18609 | case DW_TAG_volatile_type: | |
f792889a | 18610 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 18611 | break; |
06d66ee9 TT |
18612 | case DW_TAG_restrict_type: |
18613 | this_type = read_tag_restrict_type (die, cu); | |
18614 | break; | |
c906108c | 18615 | case DW_TAG_string_type: |
f792889a | 18616 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
18617 | break; |
18618 | case DW_TAG_typedef: | |
f792889a | 18619 | this_type = read_typedef (die, cu); |
c906108c | 18620 | break; |
a02abb62 | 18621 | case DW_TAG_subrange_type: |
f792889a | 18622 | this_type = read_subrange_type (die, cu); |
a02abb62 | 18623 | break; |
c906108c | 18624 | case DW_TAG_base_type: |
f792889a | 18625 | this_type = read_base_type (die, cu); |
c906108c | 18626 | break; |
81a17f79 | 18627 | case DW_TAG_unspecified_type: |
f792889a | 18628 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 18629 | break; |
0114d602 DJ |
18630 | case DW_TAG_namespace: |
18631 | this_type = read_namespace_type (die, cu); | |
18632 | break; | |
f55ee35c JK |
18633 | case DW_TAG_module: |
18634 | this_type = read_module_type (die, cu); | |
18635 | break; | |
c906108c | 18636 | default: |
3e43a32a MS |
18637 | complaint (&symfile_complaints, |
18638 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 18639 | dwarf_tag_name (die->tag)); |
c906108c SS |
18640 | break; |
18641 | } | |
63d06c5c | 18642 | |
f792889a | 18643 | return this_type; |
63d06c5c DC |
18644 | } |
18645 | ||
abc72ce4 DE |
18646 | /* See if we can figure out if the class lives in a namespace. We do |
18647 | this by looking for a member function; its demangled name will | |
18648 | contain namespace info, if there is any. | |
18649 | Return the computed name or NULL. | |
18650 | Space for the result is allocated on the objfile's obstack. | |
18651 | This is the full-die version of guess_partial_die_structure_name. | |
18652 | In this case we know DIE has no useful parent. */ | |
18653 | ||
18654 | static char * | |
18655 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
18656 | { | |
18657 | struct die_info *spec_die; | |
18658 | struct dwarf2_cu *spec_cu; | |
18659 | struct die_info *child; | |
18660 | ||
18661 | spec_cu = cu; | |
18662 | spec_die = die_specification (die, &spec_cu); | |
18663 | if (spec_die != NULL) | |
18664 | { | |
18665 | die = spec_die; | |
18666 | cu = spec_cu; | |
18667 | } | |
18668 | ||
18669 | for (child = die->child; | |
18670 | child != NULL; | |
18671 | child = child->sibling) | |
18672 | { | |
18673 | if (child->tag == DW_TAG_subprogram) | |
18674 | { | |
18675 | struct attribute *attr; | |
18676 | ||
18677 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
18678 | if (attr == NULL) | |
18679 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
18680 | if (attr != NULL) | |
18681 | { | |
18682 | char *actual_name | |
18683 | = language_class_name_from_physname (cu->language_defn, | |
18684 | DW_STRING (attr)); | |
18685 | char *name = NULL; | |
18686 | ||
18687 | if (actual_name != NULL) | |
18688 | { | |
15d034d0 | 18689 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
18690 | |
18691 | if (die_name != NULL | |
18692 | && strcmp (die_name, actual_name) != 0) | |
18693 | { | |
18694 | /* Strip off the class name from the full name. | |
18695 | We want the prefix. */ | |
18696 | int die_name_len = strlen (die_name); | |
18697 | int actual_name_len = strlen (actual_name); | |
18698 | ||
18699 | /* Test for '::' as a sanity check. */ | |
18700 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
18701 | && actual_name[actual_name_len |
18702 | - die_name_len - 1] == ':') | |
abc72ce4 | 18703 | name = |
34a68019 | 18704 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
10f0c4bb TT |
18705 | actual_name, |
18706 | actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
18707 | } |
18708 | } | |
18709 | xfree (actual_name); | |
18710 | return name; | |
18711 | } | |
18712 | } | |
18713 | } | |
18714 | ||
18715 | return NULL; | |
18716 | } | |
18717 | ||
96408a79 SA |
18718 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
18719 | prefix part in such case. See | |
18720 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
18721 | ||
18722 | static char * | |
18723 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
18724 | { | |
18725 | struct attribute *attr; | |
18726 | char *base; | |
18727 | ||
18728 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
18729 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
18730 | return NULL; | |
18731 | ||
18732 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
18733 | if (attr != NULL && DW_STRING (attr) != NULL) | |
18734 | return NULL; | |
18735 | ||
18736 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
18737 | if (attr == NULL) | |
18738 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
18739 | if (attr == NULL || DW_STRING (attr) == NULL) | |
18740 | return NULL; | |
18741 | ||
18742 | /* dwarf2_name had to be already called. */ | |
18743 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
18744 | ||
18745 | /* Strip the base name, keep any leading namespaces/classes. */ | |
18746 | base = strrchr (DW_STRING (attr), ':'); | |
18747 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
18748 | return ""; | |
18749 | ||
34a68019 | 18750 | return obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
10f0c4bb | 18751 | DW_STRING (attr), &base[-1] - DW_STRING (attr)); |
96408a79 SA |
18752 | } |
18753 | ||
fdde2d81 | 18754 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 18755 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 18756 | |
0114d602 DJ |
18757 | For example, if we're within the method foo() in the following |
18758 | code: | |
18759 | ||
18760 | namespace N { | |
18761 | class C { | |
18762 | void foo () { | |
18763 | } | |
18764 | }; | |
18765 | } | |
18766 | ||
18767 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 18768 | |
0d5cff50 | 18769 | static const char * |
e142c38c | 18770 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 18771 | { |
0114d602 DJ |
18772 | struct die_info *parent, *spec_die; |
18773 | struct dwarf2_cu *spec_cu; | |
18774 | struct type *parent_type; | |
96408a79 | 18775 | char *retval; |
63d06c5c | 18776 | |
f55ee35c JK |
18777 | if (cu->language != language_cplus && cu->language != language_java |
18778 | && cu->language != language_fortran) | |
0114d602 DJ |
18779 | return ""; |
18780 | ||
96408a79 SA |
18781 | retval = anonymous_struct_prefix (die, cu); |
18782 | if (retval) | |
18783 | return retval; | |
18784 | ||
0114d602 DJ |
18785 | /* We have to be careful in the presence of DW_AT_specification. |
18786 | For example, with GCC 3.4, given the code | |
18787 | ||
18788 | namespace N { | |
18789 | void foo() { | |
18790 | // Definition of N::foo. | |
18791 | } | |
18792 | } | |
18793 | ||
18794 | then we'll have a tree of DIEs like this: | |
18795 | ||
18796 | 1: DW_TAG_compile_unit | |
18797 | 2: DW_TAG_namespace // N | |
18798 | 3: DW_TAG_subprogram // declaration of N::foo | |
18799 | 4: DW_TAG_subprogram // definition of N::foo | |
18800 | DW_AT_specification // refers to die #3 | |
18801 | ||
18802 | Thus, when processing die #4, we have to pretend that we're in | |
18803 | the context of its DW_AT_specification, namely the contex of die | |
18804 | #3. */ | |
18805 | spec_cu = cu; | |
18806 | spec_die = die_specification (die, &spec_cu); | |
18807 | if (spec_die == NULL) | |
18808 | parent = die->parent; | |
18809 | else | |
63d06c5c | 18810 | { |
0114d602 DJ |
18811 | parent = spec_die->parent; |
18812 | cu = spec_cu; | |
63d06c5c | 18813 | } |
0114d602 DJ |
18814 | |
18815 | if (parent == NULL) | |
18816 | return ""; | |
98bfdba5 PA |
18817 | else if (parent->building_fullname) |
18818 | { | |
18819 | const char *name; | |
18820 | const char *parent_name; | |
18821 | ||
18822 | /* It has been seen on RealView 2.2 built binaries, | |
18823 | DW_TAG_template_type_param types actually _defined_ as | |
18824 | children of the parent class: | |
18825 | ||
18826 | enum E {}; | |
18827 | template class <class Enum> Class{}; | |
18828 | Class<enum E> class_e; | |
18829 | ||
18830 | 1: DW_TAG_class_type (Class) | |
18831 | 2: DW_TAG_enumeration_type (E) | |
18832 | 3: DW_TAG_enumerator (enum1:0) | |
18833 | 3: DW_TAG_enumerator (enum2:1) | |
18834 | ... | |
18835 | 2: DW_TAG_template_type_param | |
18836 | DW_AT_type DW_FORM_ref_udata (E) | |
18837 | ||
18838 | Besides being broken debug info, it can put GDB into an | |
18839 | infinite loop. Consider: | |
18840 | ||
18841 | When we're building the full name for Class<E>, we'll start | |
18842 | at Class, and go look over its template type parameters, | |
18843 | finding E. We'll then try to build the full name of E, and | |
18844 | reach here. We're now trying to build the full name of E, | |
18845 | and look over the parent DIE for containing scope. In the | |
18846 | broken case, if we followed the parent DIE of E, we'd again | |
18847 | find Class, and once again go look at its template type | |
18848 | arguments, etc., etc. Simply don't consider such parent die | |
18849 | as source-level parent of this die (it can't be, the language | |
18850 | doesn't allow it), and break the loop here. */ | |
18851 | name = dwarf2_name (die, cu); | |
18852 | parent_name = dwarf2_name (parent, cu); | |
18853 | complaint (&symfile_complaints, | |
18854 | _("template param type '%s' defined within parent '%s'"), | |
18855 | name ? name : "<unknown>", | |
18856 | parent_name ? parent_name : "<unknown>"); | |
18857 | return ""; | |
18858 | } | |
63d06c5c | 18859 | else |
0114d602 DJ |
18860 | switch (parent->tag) |
18861 | { | |
63d06c5c | 18862 | case DW_TAG_namespace: |
0114d602 | 18863 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
18864 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
18865 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
18866 | Work around this problem here. */ | |
18867 | if (cu->language == language_cplus | |
18868 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
18869 | return ""; | |
0114d602 DJ |
18870 | /* We give a name to even anonymous namespaces. */ |
18871 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 18872 | case DW_TAG_class_type: |
680b30c7 | 18873 | case DW_TAG_interface_type: |
63d06c5c | 18874 | case DW_TAG_structure_type: |
0114d602 | 18875 | case DW_TAG_union_type: |
f55ee35c | 18876 | case DW_TAG_module: |
0114d602 DJ |
18877 | parent_type = read_type_die (parent, cu); |
18878 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
18879 | return TYPE_TAG_NAME (parent_type); | |
18880 | else | |
18881 | /* An anonymous structure is only allowed non-static data | |
18882 | members; no typedefs, no member functions, et cetera. | |
18883 | So it does not need a prefix. */ | |
18884 | return ""; | |
abc72ce4 | 18885 | case DW_TAG_compile_unit: |
95554aad | 18886 | case DW_TAG_partial_unit: |
abc72ce4 DE |
18887 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
18888 | if (cu->language == language_cplus | |
8b70b953 | 18889 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
18890 | && die->child != NULL |
18891 | && (die->tag == DW_TAG_class_type | |
18892 | || die->tag == DW_TAG_structure_type | |
18893 | || die->tag == DW_TAG_union_type)) | |
18894 | { | |
18895 | char *name = guess_full_die_structure_name (die, cu); | |
18896 | if (name != NULL) | |
18897 | return name; | |
18898 | } | |
18899 | return ""; | |
3d567982 TT |
18900 | case DW_TAG_enumeration_type: |
18901 | parent_type = read_type_die (parent, cu); | |
18902 | if (TYPE_DECLARED_CLASS (parent_type)) | |
18903 | { | |
18904 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
18905 | return TYPE_TAG_NAME (parent_type); | |
18906 | return ""; | |
18907 | } | |
18908 | /* Fall through. */ | |
63d06c5c | 18909 | default: |
8176b9b8 | 18910 | return determine_prefix (parent, cu); |
63d06c5c | 18911 | } |
63d06c5c DC |
18912 | } |
18913 | ||
3e43a32a MS |
18914 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
18915 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
18916 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
18917 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
18918 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 18919 | |
f55ee35c | 18920 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
18921 | |
18922 | static char * | |
f55ee35c JK |
18923 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
18924 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 18925 | { |
f55ee35c | 18926 | const char *lead = ""; |
5c315b68 | 18927 | const char *sep; |
63d06c5c | 18928 | |
3e43a32a MS |
18929 | if (suffix == NULL || suffix[0] == '\0' |
18930 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
18931 | sep = ""; |
18932 | else if (cu->language == language_java) | |
18933 | sep = "."; | |
f55ee35c JK |
18934 | else if (cu->language == language_fortran && physname) |
18935 | { | |
18936 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
18937 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
18938 | ||
18939 | lead = "__"; | |
18940 | sep = "_MOD_"; | |
18941 | } | |
987504bb JJ |
18942 | else |
18943 | sep = "::"; | |
63d06c5c | 18944 | |
6dd47d34 DE |
18945 | if (prefix == NULL) |
18946 | prefix = ""; | |
18947 | if (suffix == NULL) | |
18948 | suffix = ""; | |
18949 | ||
987504bb JJ |
18950 | if (obs == NULL) |
18951 | { | |
3e43a32a MS |
18952 | char *retval |
18953 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 18954 | |
f55ee35c JK |
18955 | strcpy (retval, lead); |
18956 | strcat (retval, prefix); | |
6dd47d34 DE |
18957 | strcat (retval, sep); |
18958 | strcat (retval, suffix); | |
63d06c5c DC |
18959 | return retval; |
18960 | } | |
987504bb JJ |
18961 | else |
18962 | { | |
18963 | /* We have an obstack. */ | |
f55ee35c | 18964 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 18965 | } |
63d06c5c DC |
18966 | } |
18967 | ||
c906108c SS |
18968 | /* Return sibling of die, NULL if no sibling. */ |
18969 | ||
f9aca02d | 18970 | static struct die_info * |
fba45db2 | 18971 | sibling_die (struct die_info *die) |
c906108c | 18972 | { |
639d11d3 | 18973 | return die->sibling; |
c906108c SS |
18974 | } |
18975 | ||
71c25dea TT |
18976 | /* Get name of a die, return NULL if not found. */ |
18977 | ||
15d034d0 TT |
18978 | static const char * |
18979 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
18980 | struct obstack *obstack) |
18981 | { | |
18982 | if (name && cu->language == language_cplus) | |
18983 | { | |
18984 | char *canon_name = cp_canonicalize_string (name); | |
18985 | ||
18986 | if (canon_name != NULL) | |
18987 | { | |
18988 | if (strcmp (canon_name, name) != 0) | |
10f0c4bb | 18989 | name = obstack_copy0 (obstack, canon_name, strlen (canon_name)); |
71c25dea TT |
18990 | xfree (canon_name); |
18991 | } | |
18992 | } | |
18993 | ||
18994 | return name; | |
c906108c SS |
18995 | } |
18996 | ||
9219021c DC |
18997 | /* Get name of a die, return NULL if not found. */ |
18998 | ||
15d034d0 | 18999 | static const char * |
e142c38c | 19000 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
19001 | { |
19002 | struct attribute *attr; | |
19003 | ||
e142c38c | 19004 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
19005 | if ((!attr || !DW_STRING (attr)) |
19006 | && die->tag != DW_TAG_class_type | |
19007 | && die->tag != DW_TAG_interface_type | |
19008 | && die->tag != DW_TAG_structure_type | |
19009 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
19010 | return NULL; |
19011 | ||
19012 | switch (die->tag) | |
19013 | { | |
19014 | case DW_TAG_compile_unit: | |
95554aad | 19015 | case DW_TAG_partial_unit: |
71c25dea TT |
19016 | /* Compilation units have a DW_AT_name that is a filename, not |
19017 | a source language identifier. */ | |
19018 | case DW_TAG_enumeration_type: | |
19019 | case DW_TAG_enumerator: | |
19020 | /* These tags always have simple identifiers already; no need | |
19021 | to canonicalize them. */ | |
19022 | return DW_STRING (attr); | |
907af001 | 19023 | |
418835cc KS |
19024 | case DW_TAG_subprogram: |
19025 | /* Java constructors will all be named "<init>", so return | |
19026 | the class name when we see this special case. */ | |
19027 | if (cu->language == language_java | |
19028 | && DW_STRING (attr) != NULL | |
19029 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
19030 | { | |
19031 | struct dwarf2_cu *spec_cu = cu; | |
19032 | struct die_info *spec_die; | |
19033 | ||
19034 | /* GCJ will output '<init>' for Java constructor names. | |
19035 | For this special case, return the name of the parent class. */ | |
19036 | ||
cdc07690 | 19037 | /* GCJ may output subprogram DIEs with AT_specification set. |
418835cc KS |
19038 | If so, use the name of the specified DIE. */ |
19039 | spec_die = die_specification (die, &spec_cu); | |
19040 | if (spec_die != NULL) | |
19041 | return dwarf2_name (spec_die, spec_cu); | |
19042 | ||
19043 | do | |
19044 | { | |
19045 | die = die->parent; | |
19046 | if (die->tag == DW_TAG_class_type) | |
19047 | return dwarf2_name (die, cu); | |
19048 | } | |
95554aad TT |
19049 | while (die->tag != DW_TAG_compile_unit |
19050 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 19051 | } |
907af001 UW |
19052 | break; |
19053 | ||
19054 | case DW_TAG_class_type: | |
19055 | case DW_TAG_interface_type: | |
19056 | case DW_TAG_structure_type: | |
19057 | case DW_TAG_union_type: | |
19058 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
19059 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
19060 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
19061 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
19062 | if (attr && DW_STRING (attr) |
19063 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
19064 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 19065 | return NULL; |
53832f31 TT |
19066 | |
19067 | /* GCC might emit a nameless typedef that has a linkage name. See | |
19068 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19069 | if (!attr || DW_STRING (attr) == NULL) | |
19070 | { | |
df5c6c50 | 19071 | char *demangled = NULL; |
53832f31 TT |
19072 | |
19073 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
19074 | if (attr == NULL) | |
19075 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
19076 | ||
19077 | if (attr == NULL || DW_STRING (attr) == NULL) | |
19078 | return NULL; | |
19079 | ||
df5c6c50 JK |
19080 | /* Avoid demangling DW_STRING (attr) the second time on a second |
19081 | call for the same DIE. */ | |
19082 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 19083 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
19084 | |
19085 | if (demangled) | |
19086 | { | |
96408a79 SA |
19087 | char *base; |
19088 | ||
53832f31 | 19089 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 TT |
19090 | DW_STRING (attr) |
19091 | = obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
19092 | demangled, strlen (demangled)); | |
53832f31 TT |
19093 | DW_STRING_IS_CANONICAL (attr) = 1; |
19094 | xfree (demangled); | |
96408a79 SA |
19095 | |
19096 | /* Strip any leading namespaces/classes, keep only the base name. | |
19097 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
19098 | base = strrchr (DW_STRING (attr), ':'); | |
19099 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
19100 | return &base[1]; | |
19101 | else | |
19102 | return DW_STRING (attr); | |
53832f31 TT |
19103 | } |
19104 | } | |
907af001 UW |
19105 | break; |
19106 | ||
71c25dea | 19107 | default: |
907af001 UW |
19108 | break; |
19109 | } | |
19110 | ||
19111 | if (!DW_STRING_IS_CANONICAL (attr)) | |
19112 | { | |
19113 | DW_STRING (attr) | |
19114 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 19115 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 19116 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 19117 | } |
907af001 | 19118 | return DW_STRING (attr); |
9219021c DC |
19119 | } |
19120 | ||
19121 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
19122 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
19123 | containing the return value on output. */ | |
9219021c DC |
19124 | |
19125 | static struct die_info * | |
f2f0e013 | 19126 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
19127 | { |
19128 | struct attribute *attr; | |
9219021c | 19129 | |
f2f0e013 | 19130 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
19131 | if (attr == NULL) |
19132 | return NULL; | |
19133 | ||
f2f0e013 | 19134 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
19135 | } |
19136 | ||
c906108c SS |
19137 | /* Convert a DIE tag into its string name. */ |
19138 | ||
f39c6ffd | 19139 | static const char * |
aa1ee363 | 19140 | dwarf_tag_name (unsigned tag) |
c906108c | 19141 | { |
f39c6ffd TT |
19142 | const char *name = get_DW_TAG_name (tag); |
19143 | ||
19144 | if (name == NULL) | |
19145 | return "DW_TAG_<unknown>"; | |
19146 | ||
19147 | return name; | |
c906108c SS |
19148 | } |
19149 | ||
19150 | /* Convert a DWARF attribute code into its string name. */ | |
19151 | ||
f39c6ffd | 19152 | static const char * |
aa1ee363 | 19153 | dwarf_attr_name (unsigned attr) |
c906108c | 19154 | { |
f39c6ffd TT |
19155 | const char *name; |
19156 | ||
c764a876 | 19157 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
19158 | if (attr == DW_AT_MIPS_fde) |
19159 | return "DW_AT_MIPS_fde"; | |
19160 | #else | |
19161 | if (attr == DW_AT_HP_block_index) | |
19162 | return "DW_AT_HP_block_index"; | |
c764a876 | 19163 | #endif |
f39c6ffd TT |
19164 | |
19165 | name = get_DW_AT_name (attr); | |
19166 | ||
19167 | if (name == NULL) | |
19168 | return "DW_AT_<unknown>"; | |
19169 | ||
19170 | return name; | |
c906108c SS |
19171 | } |
19172 | ||
19173 | /* Convert a DWARF value form code into its string name. */ | |
19174 | ||
f39c6ffd | 19175 | static const char * |
aa1ee363 | 19176 | dwarf_form_name (unsigned form) |
c906108c | 19177 | { |
f39c6ffd TT |
19178 | const char *name = get_DW_FORM_name (form); |
19179 | ||
19180 | if (name == NULL) | |
19181 | return "DW_FORM_<unknown>"; | |
19182 | ||
19183 | return name; | |
c906108c SS |
19184 | } |
19185 | ||
19186 | static char * | |
fba45db2 | 19187 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
19188 | { |
19189 | if (mybool) | |
19190 | return "TRUE"; | |
19191 | else | |
19192 | return "FALSE"; | |
19193 | } | |
19194 | ||
19195 | /* Convert a DWARF type code into its string name. */ | |
19196 | ||
f39c6ffd | 19197 | static const char * |
aa1ee363 | 19198 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 19199 | { |
f39c6ffd | 19200 | const char *name = get_DW_ATE_name (enc); |
c906108c | 19201 | |
f39c6ffd TT |
19202 | if (name == NULL) |
19203 | return "DW_ATE_<unknown>"; | |
c906108c | 19204 | |
f39c6ffd | 19205 | return name; |
c906108c | 19206 | } |
c906108c | 19207 | |
f9aca02d | 19208 | static void |
d97bc12b | 19209 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
19210 | { |
19211 | unsigned int i; | |
19212 | ||
d97bc12b DE |
19213 | print_spaces (indent, f); |
19214 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 19215 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
19216 | |
19217 | if (die->parent != NULL) | |
19218 | { | |
19219 | print_spaces (indent, f); | |
19220 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 19221 | die->parent->offset.sect_off); |
d97bc12b DE |
19222 | } |
19223 | ||
19224 | print_spaces (indent, f); | |
19225 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 19226 | dwarf_bool_name (die->child != NULL)); |
c906108c | 19227 | |
d97bc12b DE |
19228 | print_spaces (indent, f); |
19229 | fprintf_unfiltered (f, " attributes:\n"); | |
19230 | ||
c906108c SS |
19231 | for (i = 0; i < die->num_attrs; ++i) |
19232 | { | |
d97bc12b DE |
19233 | print_spaces (indent, f); |
19234 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
19235 | dwarf_attr_name (die->attrs[i].name), |
19236 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 19237 | |
c906108c SS |
19238 | switch (die->attrs[i].form) |
19239 | { | |
c906108c | 19240 | case DW_FORM_addr: |
3019eac3 | 19241 | case DW_FORM_GNU_addr_index: |
d97bc12b | 19242 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 19243 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
19244 | break; |
19245 | case DW_FORM_block2: | |
19246 | case DW_FORM_block4: | |
19247 | case DW_FORM_block: | |
19248 | case DW_FORM_block1: | |
56eb65bd SP |
19249 | fprintf_unfiltered (f, "block: size %s", |
19250 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 19251 | break; |
2dc7f7b3 | 19252 | case DW_FORM_exprloc: |
56eb65bd SP |
19253 | fprintf_unfiltered (f, "expression: size %s", |
19254 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 19255 | break; |
4568ecf9 DE |
19256 | case DW_FORM_ref_addr: |
19257 | fprintf_unfiltered (f, "ref address: "); | |
19258 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19259 | break; | |
36586728 TT |
19260 | case DW_FORM_GNU_ref_alt: |
19261 | fprintf_unfiltered (f, "alt ref address: "); | |
19262 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
19263 | break; | |
10b3939b DJ |
19264 | case DW_FORM_ref1: |
19265 | case DW_FORM_ref2: | |
19266 | case DW_FORM_ref4: | |
4568ecf9 DE |
19267 | case DW_FORM_ref8: |
19268 | case DW_FORM_ref_udata: | |
d97bc12b | 19269 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 19270 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 19271 | break; |
c906108c SS |
19272 | case DW_FORM_data1: |
19273 | case DW_FORM_data2: | |
19274 | case DW_FORM_data4: | |
ce5d95e1 | 19275 | case DW_FORM_data8: |
c906108c SS |
19276 | case DW_FORM_udata: |
19277 | case DW_FORM_sdata: | |
43bbcdc2 PH |
19278 | fprintf_unfiltered (f, "constant: %s", |
19279 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 19280 | break; |
2dc7f7b3 TT |
19281 | case DW_FORM_sec_offset: |
19282 | fprintf_unfiltered (f, "section offset: %s", | |
19283 | pulongest (DW_UNSND (&die->attrs[i]))); | |
19284 | break; | |
55f1336d | 19285 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
19286 | fprintf_unfiltered (f, "signature: %s", |
19287 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 19288 | break; |
c906108c | 19289 | case DW_FORM_string: |
4bdf3d34 | 19290 | case DW_FORM_strp: |
3019eac3 | 19291 | case DW_FORM_GNU_str_index: |
36586728 | 19292 | case DW_FORM_GNU_strp_alt: |
8285870a | 19293 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 19294 | DW_STRING (&die->attrs[i]) |
8285870a JK |
19295 | ? DW_STRING (&die->attrs[i]) : "", |
19296 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
19297 | break; |
19298 | case DW_FORM_flag: | |
19299 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 19300 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 19301 | else |
d97bc12b | 19302 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 19303 | break; |
2dc7f7b3 TT |
19304 | case DW_FORM_flag_present: |
19305 | fprintf_unfiltered (f, "flag: TRUE"); | |
19306 | break; | |
a8329558 | 19307 | case DW_FORM_indirect: |
0963b4bd MS |
19308 | /* The reader will have reduced the indirect form to |
19309 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
19310 | fprintf_unfiltered (f, |
19311 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 19312 | break; |
c906108c | 19313 | default: |
d97bc12b | 19314 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 19315 | die->attrs[i].form); |
d97bc12b | 19316 | break; |
c906108c | 19317 | } |
d97bc12b | 19318 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
19319 | } |
19320 | } | |
19321 | ||
f9aca02d | 19322 | static void |
d97bc12b | 19323 | dump_die_for_error (struct die_info *die) |
c906108c | 19324 | { |
d97bc12b DE |
19325 | dump_die_shallow (gdb_stderr, 0, die); |
19326 | } | |
19327 | ||
19328 | static void | |
19329 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
19330 | { | |
19331 | int indent = level * 4; | |
19332 | ||
19333 | gdb_assert (die != NULL); | |
19334 | ||
19335 | if (level >= max_level) | |
19336 | return; | |
19337 | ||
19338 | dump_die_shallow (f, indent, die); | |
19339 | ||
19340 | if (die->child != NULL) | |
c906108c | 19341 | { |
d97bc12b DE |
19342 | print_spaces (indent, f); |
19343 | fprintf_unfiltered (f, " Children:"); | |
19344 | if (level + 1 < max_level) | |
19345 | { | |
19346 | fprintf_unfiltered (f, "\n"); | |
19347 | dump_die_1 (f, level + 1, max_level, die->child); | |
19348 | } | |
19349 | else | |
19350 | { | |
3e43a32a MS |
19351 | fprintf_unfiltered (f, |
19352 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
19353 | } |
19354 | } | |
19355 | ||
19356 | if (die->sibling != NULL && level > 0) | |
19357 | { | |
19358 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
19359 | } |
19360 | } | |
19361 | ||
d97bc12b DE |
19362 | /* This is called from the pdie macro in gdbinit.in. |
19363 | It's not static so gcc will keep a copy callable from gdb. */ | |
19364 | ||
19365 | void | |
19366 | dump_die (struct die_info *die, int max_level) | |
19367 | { | |
19368 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
19369 | } | |
19370 | ||
f9aca02d | 19371 | static void |
51545339 | 19372 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19373 | { |
51545339 | 19374 | void **slot; |
c906108c | 19375 | |
b64f50a1 JK |
19376 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
19377 | INSERT); | |
51545339 DJ |
19378 | |
19379 | *slot = die; | |
c906108c SS |
19380 | } |
19381 | ||
b64f50a1 JK |
19382 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
19383 | required kind. */ | |
19384 | ||
19385 | static sect_offset | |
ff39bb5e | 19386 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 19387 | { |
4568ecf9 | 19388 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 19389 | |
7771576e | 19390 | if (attr_form_is_ref (attr)) |
b64f50a1 | 19391 | return retval; |
93311388 | 19392 | |
b64f50a1 | 19393 | retval.sect_off = 0; |
93311388 DE |
19394 | complaint (&symfile_complaints, |
19395 | _("unsupported die ref attribute form: '%s'"), | |
19396 | dwarf_form_name (attr->form)); | |
b64f50a1 | 19397 | return retval; |
c906108c SS |
19398 | } |
19399 | ||
43bbcdc2 PH |
19400 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
19401 | * the value held by the attribute is not constant. */ | |
a02abb62 | 19402 | |
43bbcdc2 | 19403 | static LONGEST |
ff39bb5e | 19404 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
19405 | { |
19406 | if (attr->form == DW_FORM_sdata) | |
19407 | return DW_SND (attr); | |
19408 | else if (attr->form == DW_FORM_udata | |
19409 | || attr->form == DW_FORM_data1 | |
19410 | || attr->form == DW_FORM_data2 | |
19411 | || attr->form == DW_FORM_data4 | |
19412 | || attr->form == DW_FORM_data8) | |
19413 | return DW_UNSND (attr); | |
19414 | else | |
19415 | { | |
3e43a32a MS |
19416 | complaint (&symfile_complaints, |
19417 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
19418 | dwarf_form_name (attr->form)); |
19419 | return default_value; | |
19420 | } | |
19421 | } | |
19422 | ||
348e048f DE |
19423 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
19424 | On entry *REF_CU is the CU of SRC_DIE. | |
19425 | On exit *REF_CU is the CU of the result. */ | |
19426 | ||
19427 | static struct die_info * | |
ff39bb5e | 19428 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
19429 | struct dwarf2_cu **ref_cu) |
19430 | { | |
19431 | struct die_info *die; | |
19432 | ||
7771576e | 19433 | if (attr_form_is_ref (attr)) |
348e048f | 19434 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 19435 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
19436 | die = follow_die_sig (src_die, attr, ref_cu); |
19437 | else | |
19438 | { | |
19439 | dump_die_for_error (src_die); | |
19440 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 19441 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
19442 | } |
19443 | ||
19444 | return die; | |
03dd20cc DJ |
19445 | } |
19446 | ||
5c631832 | 19447 | /* Follow reference OFFSET. |
673bfd45 DE |
19448 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
19449 | On exit *REF_CU is the CU of the result. | |
19450 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 19451 | |
f9aca02d | 19452 | static struct die_info * |
36586728 TT |
19453 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
19454 | struct dwarf2_cu **ref_cu) | |
c906108c | 19455 | { |
10b3939b | 19456 | struct die_info temp_die; |
f2f0e013 | 19457 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 19458 | |
348e048f DE |
19459 | gdb_assert (cu->per_cu != NULL); |
19460 | ||
98bfdba5 PA |
19461 | target_cu = cu; |
19462 | ||
3019eac3 | 19463 | if (cu->per_cu->is_debug_types) |
348e048f DE |
19464 | { |
19465 | /* .debug_types CUs cannot reference anything outside their CU. | |
19466 | If they need to, they have to reference a signatured type via | |
55f1336d | 19467 | DW_FORM_ref_sig8. */ |
348e048f | 19468 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 19469 | return NULL; |
348e048f | 19470 | } |
36586728 TT |
19471 | else if (offset_in_dwz != cu->per_cu->is_dwz |
19472 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
19473 | { |
19474 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 19475 | |
36586728 TT |
19476 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
19477 | cu->objfile); | |
03dd20cc DJ |
19478 | |
19479 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
19480 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
19481 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 19482 | |
10b3939b DJ |
19483 | target_cu = per_cu->cu; |
19484 | } | |
98bfdba5 PA |
19485 | else if (cu->dies == NULL) |
19486 | { | |
19487 | /* We're loading full DIEs during partial symbol reading. */ | |
19488 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 19489 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 19490 | } |
c906108c | 19491 | |
f2f0e013 | 19492 | *ref_cu = target_cu; |
51545339 | 19493 | temp_die.offset = offset; |
b64f50a1 | 19494 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 19495 | } |
10b3939b | 19496 | |
5c631832 JK |
19497 | /* Follow reference attribute ATTR of SRC_DIE. |
19498 | On entry *REF_CU is the CU of SRC_DIE. | |
19499 | On exit *REF_CU is the CU of the result. */ | |
19500 | ||
19501 | static struct die_info * | |
ff39bb5e | 19502 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
19503 | struct dwarf2_cu **ref_cu) |
19504 | { | |
b64f50a1 | 19505 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
19506 | struct dwarf2_cu *cu = *ref_cu; |
19507 | struct die_info *die; | |
19508 | ||
36586728 TT |
19509 | die = follow_die_offset (offset, |
19510 | (attr->form == DW_FORM_GNU_ref_alt | |
19511 | || cu->per_cu->is_dwz), | |
19512 | ref_cu); | |
5c631832 JK |
19513 | if (!die) |
19514 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
19515 | "at 0x%x [in module %s]"), | |
4262abfb JK |
19516 | offset.sect_off, src_die->offset.sect_off, |
19517 | objfile_name (cu->objfile)); | |
348e048f | 19518 | |
5c631832 JK |
19519 | return die; |
19520 | } | |
19521 | ||
d83e736b JK |
19522 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
19523 | Returned value is intended for DW_OP_call*. Returned | |
19524 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
19525 | |
19526 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
19527 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
19528 | struct dwarf2_per_cu_data *per_cu, | |
19529 | CORE_ADDR (*get_frame_pc) (void *baton), | |
19530 | void *baton) | |
5c631832 | 19531 | { |
918dd910 | 19532 | struct dwarf2_cu *cu; |
5c631832 JK |
19533 | struct die_info *die; |
19534 | struct attribute *attr; | |
19535 | struct dwarf2_locexpr_baton retval; | |
19536 | ||
8cf6f0b1 TT |
19537 | dw2_setup (per_cu->objfile); |
19538 | ||
918dd910 JK |
19539 | if (per_cu->cu == NULL) |
19540 | load_cu (per_cu); | |
19541 | cu = per_cu->cu; | |
19542 | ||
36586728 | 19543 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
19544 | if (!die) |
19545 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 19546 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
19547 | |
19548 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
19549 | if (!attr) | |
19550 | { | |
e103e986 JK |
19551 | /* DWARF: "If there is no such attribute, then there is no effect.". |
19552 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 19553 | |
e103e986 | 19554 | retval.data = NULL; |
5c631832 JK |
19555 | retval.size = 0; |
19556 | } | |
8cf6f0b1 TT |
19557 | else if (attr_form_is_section_offset (attr)) |
19558 | { | |
19559 | struct dwarf2_loclist_baton loclist_baton; | |
19560 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
19561 | size_t size; | |
19562 | ||
19563 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
19564 | ||
19565 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
19566 | &size, pc); | |
19567 | retval.size = size; | |
19568 | } | |
5c631832 JK |
19569 | else |
19570 | { | |
19571 | if (!attr_form_is_block (attr)) | |
19572 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
19573 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 19574 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
19575 | |
19576 | retval.data = DW_BLOCK (attr)->data; | |
19577 | retval.size = DW_BLOCK (attr)->size; | |
19578 | } | |
19579 | retval.per_cu = cu->per_cu; | |
918dd910 | 19580 | |
918dd910 JK |
19581 | age_cached_comp_units (); |
19582 | ||
5c631832 | 19583 | return retval; |
348e048f DE |
19584 | } |
19585 | ||
8b9737bf TT |
19586 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
19587 | offset. */ | |
19588 | ||
19589 | struct dwarf2_locexpr_baton | |
19590 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
19591 | struct dwarf2_per_cu_data *per_cu, | |
19592 | CORE_ADDR (*get_frame_pc) (void *baton), | |
19593 | void *baton) | |
19594 | { | |
19595 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
19596 | ||
19597 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
19598 | } | |
19599 | ||
b6807d98 TT |
19600 | /* Write a constant of a given type as target-ordered bytes into |
19601 | OBSTACK. */ | |
19602 | ||
19603 | static const gdb_byte * | |
19604 | write_constant_as_bytes (struct obstack *obstack, | |
19605 | enum bfd_endian byte_order, | |
19606 | struct type *type, | |
19607 | ULONGEST value, | |
19608 | LONGEST *len) | |
19609 | { | |
19610 | gdb_byte *result; | |
19611 | ||
19612 | *len = TYPE_LENGTH (type); | |
19613 | result = obstack_alloc (obstack, *len); | |
19614 | store_unsigned_integer (result, *len, byte_order, value); | |
19615 | ||
19616 | return result; | |
19617 | } | |
19618 | ||
19619 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
19620 | pointer to the constant bytes and set LEN to the length of the | |
19621 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
19622 | does not have a DW_AT_const_value, return NULL. */ | |
19623 | ||
19624 | const gdb_byte * | |
19625 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
19626 | struct dwarf2_per_cu_data *per_cu, | |
19627 | struct obstack *obstack, | |
19628 | LONGEST *len) | |
19629 | { | |
19630 | struct dwarf2_cu *cu; | |
19631 | struct die_info *die; | |
19632 | struct attribute *attr; | |
19633 | const gdb_byte *result = NULL; | |
19634 | struct type *type; | |
19635 | LONGEST value; | |
19636 | enum bfd_endian byte_order; | |
19637 | ||
19638 | dw2_setup (per_cu->objfile); | |
19639 | ||
19640 | if (per_cu->cu == NULL) | |
19641 | load_cu (per_cu); | |
19642 | cu = per_cu->cu; | |
19643 | ||
19644 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
19645 | if (!die) | |
19646 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 19647 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
19648 | |
19649 | ||
19650 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
19651 | if (attr == NULL) | |
19652 | return NULL; | |
19653 | ||
19654 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
19655 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
19656 | ||
19657 | switch (attr->form) | |
19658 | { | |
19659 | case DW_FORM_addr: | |
19660 | case DW_FORM_GNU_addr_index: | |
19661 | { | |
19662 | gdb_byte *tem; | |
19663 | ||
19664 | *len = cu->header.addr_size; | |
19665 | tem = obstack_alloc (obstack, *len); | |
19666 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); | |
19667 | result = tem; | |
19668 | } | |
19669 | break; | |
19670 | case DW_FORM_string: | |
19671 | case DW_FORM_strp: | |
19672 | case DW_FORM_GNU_str_index: | |
19673 | case DW_FORM_GNU_strp_alt: | |
19674 | /* DW_STRING is already allocated on the objfile obstack, point | |
19675 | directly to it. */ | |
19676 | result = (const gdb_byte *) DW_STRING (attr); | |
19677 | *len = strlen (DW_STRING (attr)); | |
19678 | break; | |
19679 | case DW_FORM_block1: | |
19680 | case DW_FORM_block2: | |
19681 | case DW_FORM_block4: | |
19682 | case DW_FORM_block: | |
19683 | case DW_FORM_exprloc: | |
19684 | result = DW_BLOCK (attr)->data; | |
19685 | *len = DW_BLOCK (attr)->size; | |
19686 | break; | |
19687 | ||
19688 | /* The DW_AT_const_value attributes are supposed to carry the | |
19689 | symbol's value "represented as it would be on the target | |
19690 | architecture." By the time we get here, it's already been | |
19691 | converted to host endianness, so we just need to sign- or | |
19692 | zero-extend it as appropriate. */ | |
19693 | case DW_FORM_data1: | |
19694 | type = die_type (die, cu); | |
19695 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
19696 | if (result == NULL) | |
19697 | result = write_constant_as_bytes (obstack, byte_order, | |
19698 | type, value, len); | |
19699 | break; | |
19700 | case DW_FORM_data2: | |
19701 | type = die_type (die, cu); | |
19702 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
19703 | if (result == NULL) | |
19704 | result = write_constant_as_bytes (obstack, byte_order, | |
19705 | type, value, len); | |
19706 | break; | |
19707 | case DW_FORM_data4: | |
19708 | type = die_type (die, cu); | |
19709 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
19710 | if (result == NULL) | |
19711 | result = write_constant_as_bytes (obstack, byte_order, | |
19712 | type, value, len); | |
19713 | break; | |
19714 | case DW_FORM_data8: | |
19715 | type = die_type (die, cu); | |
19716 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
19717 | if (result == NULL) | |
19718 | result = write_constant_as_bytes (obstack, byte_order, | |
19719 | type, value, len); | |
19720 | break; | |
19721 | ||
19722 | case DW_FORM_sdata: | |
19723 | type = die_type (die, cu); | |
19724 | result = write_constant_as_bytes (obstack, byte_order, | |
19725 | type, DW_SND (attr), len); | |
19726 | break; | |
19727 | ||
19728 | case DW_FORM_udata: | |
19729 | type = die_type (die, cu); | |
19730 | result = write_constant_as_bytes (obstack, byte_order, | |
19731 | type, DW_UNSND (attr), len); | |
19732 | break; | |
19733 | ||
19734 | default: | |
19735 | complaint (&symfile_complaints, | |
19736 | _("unsupported const value attribute form: '%s'"), | |
19737 | dwarf_form_name (attr->form)); | |
19738 | break; | |
19739 | } | |
19740 | ||
19741 | return result; | |
19742 | } | |
19743 | ||
8a9b8146 TT |
19744 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
19745 | PER_CU. */ | |
19746 | ||
19747 | struct type * | |
b64f50a1 | 19748 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
19749 | struct dwarf2_per_cu_data *per_cu) |
19750 | { | |
b64f50a1 JK |
19751 | sect_offset die_offset_sect; |
19752 | ||
8a9b8146 | 19753 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
19754 | |
19755 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
19756 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
19757 | } |
19758 | ||
ac9ec31b | 19759 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 19760 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
19761 | On exit *REF_CU is the CU of the result. |
19762 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
19763 | |
19764 | static struct die_info * | |
ac9ec31b DE |
19765 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
19766 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
19767 | { |
19768 | struct objfile *objfile = (*ref_cu)->objfile; | |
19769 | struct die_info temp_die; | |
348e048f DE |
19770 | struct dwarf2_cu *sig_cu; |
19771 | struct die_info *die; | |
19772 | ||
ac9ec31b DE |
19773 | /* While it might be nice to assert sig_type->type == NULL here, |
19774 | we can get here for DW_AT_imported_declaration where we need | |
19775 | the DIE not the type. */ | |
348e048f DE |
19776 | |
19777 | /* If necessary, add it to the queue and load its DIEs. */ | |
19778 | ||
95554aad | 19779 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 19780 | read_signatured_type (sig_type); |
348e048f | 19781 | |
348e048f | 19782 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 19783 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
19784 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
19785 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
19786 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
19787 | temp_die.offset.sect_off); | |
348e048f DE |
19788 | if (die) |
19789 | { | |
796a7ff8 DE |
19790 | /* For .gdb_index version 7 keep track of included TUs. |
19791 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
19792 | if (dwarf2_per_objfile->index_table != NULL | |
19793 | && dwarf2_per_objfile->index_table->version <= 7) | |
19794 | { | |
19795 | VEC_safe_push (dwarf2_per_cu_ptr, | |
19796 | (*ref_cu)->per_cu->imported_symtabs, | |
19797 | sig_cu->per_cu); | |
19798 | } | |
19799 | ||
348e048f DE |
19800 | *ref_cu = sig_cu; |
19801 | return die; | |
19802 | } | |
19803 | ||
ac9ec31b DE |
19804 | return NULL; |
19805 | } | |
19806 | ||
19807 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
19808 | On entry *REF_CU is the CU of SRC_DIE. | |
19809 | On exit *REF_CU is the CU of the result. | |
19810 | The result is the DIE of the type. | |
19811 | If the referenced type cannot be found an error is thrown. */ | |
19812 | ||
19813 | static struct die_info * | |
ff39bb5e | 19814 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
19815 | struct dwarf2_cu **ref_cu) |
19816 | { | |
19817 | ULONGEST signature = DW_SIGNATURE (attr); | |
19818 | struct signatured_type *sig_type; | |
19819 | struct die_info *die; | |
19820 | ||
19821 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
19822 | ||
a2ce51a0 | 19823 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
19824 | /* sig_type will be NULL if the signatured type is missing from |
19825 | the debug info. */ | |
19826 | if (sig_type == NULL) | |
19827 | { | |
19828 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
19829 | " from DIE at 0x%x [in module %s]"), | |
19830 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 19831 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
19832 | } |
19833 | ||
19834 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
19835 | if (die == NULL) | |
19836 | { | |
19837 | dump_die_for_error (src_die); | |
19838 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
19839 | " from DIE at 0x%x [in module %s]"), | |
19840 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 19841 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
19842 | } |
19843 | ||
19844 | return die; | |
19845 | } | |
19846 | ||
19847 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
19848 | reading in and processing the type unit if necessary. */ | |
19849 | ||
19850 | static struct type * | |
19851 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
19852 | struct dwarf2_cu *cu) | |
19853 | { | |
19854 | struct signatured_type *sig_type; | |
19855 | struct dwarf2_cu *type_cu; | |
19856 | struct die_info *type_die; | |
19857 | struct type *type; | |
19858 | ||
a2ce51a0 | 19859 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
19860 | /* sig_type will be NULL if the signatured type is missing from |
19861 | the debug info. */ | |
19862 | if (sig_type == NULL) | |
19863 | { | |
19864 | complaint (&symfile_complaints, | |
19865 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
19866 | " from DIE at 0x%x [in module %s]"), | |
19867 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19868 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19869 | return build_error_marker_type (cu, die); |
19870 | } | |
19871 | ||
19872 | /* If we already know the type we're done. */ | |
19873 | if (sig_type->type != NULL) | |
19874 | return sig_type->type; | |
19875 | ||
19876 | type_cu = cu; | |
19877 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
19878 | if (type_die != NULL) | |
19879 | { | |
19880 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
19881 | is created. This is important, for example, because for c++ classes | |
19882 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
19883 | type = read_type_die (type_die, type_cu); | |
19884 | if (type == NULL) | |
19885 | { | |
19886 | complaint (&symfile_complaints, | |
19887 | _("Dwarf Error: Cannot build signatured type %s" | |
19888 | " referenced from DIE at 0x%x [in module %s]"), | |
19889 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19890 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19891 | type = build_error_marker_type (cu, die); |
19892 | } | |
19893 | } | |
19894 | else | |
19895 | { | |
19896 | complaint (&symfile_complaints, | |
19897 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
19898 | " from DIE at 0x%x [in module %s]"), | |
19899 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19900 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19901 | type = build_error_marker_type (cu, die); |
19902 | } | |
19903 | sig_type->type = type; | |
19904 | ||
19905 | return type; | |
19906 | } | |
19907 | ||
19908 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
19909 | reading in and processing the type unit if necessary. */ | |
19910 | ||
19911 | static struct type * | |
ff39bb5e | 19912 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 19913 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
19914 | { |
19915 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 19916 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19917 | { |
19918 | struct dwarf2_cu *type_cu = cu; | |
19919 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
19920 | ||
19921 | return read_type_die (type_die, type_cu); | |
19922 | } | |
19923 | else if (attr->form == DW_FORM_ref_sig8) | |
19924 | { | |
19925 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
19926 | } | |
19927 | else | |
19928 | { | |
19929 | complaint (&symfile_complaints, | |
19930 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
19931 | " at 0x%x [in module %s]"), | |
19932 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 19933 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19934 | return build_error_marker_type (cu, die); |
19935 | } | |
348e048f DE |
19936 | } |
19937 | ||
e5fe5e75 | 19938 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
19939 | |
19940 | static void | |
e5fe5e75 | 19941 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 19942 | { |
52dc124a | 19943 | struct signatured_type *sig_type; |
348e048f | 19944 | |
f4dc4d17 DE |
19945 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
19946 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
19947 | ||
6721b2ec DE |
19948 | /* We have the per_cu, but we need the signatured_type. |
19949 | Fortunately this is an easy translation. */ | |
19950 | gdb_assert (per_cu->is_debug_types); | |
19951 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 19952 | |
6721b2ec | 19953 | gdb_assert (per_cu->cu == NULL); |
348e048f | 19954 | |
52dc124a | 19955 | read_signatured_type (sig_type); |
348e048f | 19956 | |
6721b2ec | 19957 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
19958 | } |
19959 | ||
dee91e82 DE |
19960 | /* die_reader_func for read_signatured_type. |
19961 | This is identical to load_full_comp_unit_reader, | |
19962 | but is kept separate for now. */ | |
348e048f DE |
19963 | |
19964 | static void | |
dee91e82 | 19965 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 19966 | const gdb_byte *info_ptr, |
dee91e82 DE |
19967 | struct die_info *comp_unit_die, |
19968 | int has_children, | |
19969 | void *data) | |
348e048f | 19970 | { |
dee91e82 | 19971 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 19972 | |
dee91e82 DE |
19973 | gdb_assert (cu->die_hash == NULL); |
19974 | cu->die_hash = | |
19975 | htab_create_alloc_ex (cu->header.length / 12, | |
19976 | die_hash, | |
19977 | die_eq, | |
19978 | NULL, | |
19979 | &cu->comp_unit_obstack, | |
19980 | hashtab_obstack_allocate, | |
19981 | dummy_obstack_deallocate); | |
348e048f | 19982 | |
dee91e82 DE |
19983 | if (has_children) |
19984 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
19985 | &info_ptr, comp_unit_die); | |
19986 | cu->dies = comp_unit_die; | |
19987 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
19988 | |
19989 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 19990 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 19991 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
19992 | or we won't be able to build types correctly. |
19993 | Similarly, if we do not read the producer, we can not apply | |
19994 | producer-specific interpretation. */ | |
95554aad | 19995 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 19996 | } |
348e048f | 19997 | |
3019eac3 DE |
19998 | /* Read in a signatured type and build its CU and DIEs. |
19999 | If the type is a stub for the real type in a DWO file, | |
20000 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
20001 | |
20002 | static void | |
20003 | read_signatured_type (struct signatured_type *sig_type) | |
20004 | { | |
20005 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 20006 | |
3019eac3 | 20007 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 20008 | gdb_assert (per_cu->cu == NULL); |
348e048f | 20009 | |
f4dc4d17 DE |
20010 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
20011 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 20012 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
20013 | } |
20014 | ||
c906108c SS |
20015 | /* Decode simple location descriptions. |
20016 | Given a pointer to a dwarf block that defines a location, compute | |
20017 | the location and return the value. | |
20018 | ||
4cecd739 DJ |
20019 | NOTE drow/2003-11-18: This function is called in two situations |
20020 | now: for the address of static or global variables (partial symbols | |
20021 | only) and for offsets into structures which are expected to be | |
20022 | (more or less) constant. The partial symbol case should go away, | |
20023 | and only the constant case should remain. That will let this | |
20024 | function complain more accurately. A few special modes are allowed | |
20025 | without complaint for global variables (for instance, global | |
20026 | register values and thread-local values). | |
c906108c SS |
20027 | |
20028 | A location description containing no operations indicates that the | |
4cecd739 | 20029 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
20030 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
20031 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
20032 | complaint. |
20033 | ||
20034 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
20035 | |
20036 | static CORE_ADDR | |
e7c27a73 | 20037 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 20038 | { |
e7c27a73 | 20039 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
20040 | size_t i; |
20041 | size_t size = blk->size; | |
d521ce57 | 20042 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
20043 | CORE_ADDR stack[64]; |
20044 | int stacki; | |
20045 | unsigned int bytes_read, unsnd; | |
20046 | gdb_byte op; | |
c906108c | 20047 | |
21ae7a4d JK |
20048 | i = 0; |
20049 | stacki = 0; | |
20050 | stack[stacki] = 0; | |
20051 | stack[++stacki] = 0; | |
20052 | ||
20053 | while (i < size) | |
20054 | { | |
20055 | op = data[i++]; | |
20056 | switch (op) | |
20057 | { | |
20058 | case DW_OP_lit0: | |
20059 | case DW_OP_lit1: | |
20060 | case DW_OP_lit2: | |
20061 | case DW_OP_lit3: | |
20062 | case DW_OP_lit4: | |
20063 | case DW_OP_lit5: | |
20064 | case DW_OP_lit6: | |
20065 | case DW_OP_lit7: | |
20066 | case DW_OP_lit8: | |
20067 | case DW_OP_lit9: | |
20068 | case DW_OP_lit10: | |
20069 | case DW_OP_lit11: | |
20070 | case DW_OP_lit12: | |
20071 | case DW_OP_lit13: | |
20072 | case DW_OP_lit14: | |
20073 | case DW_OP_lit15: | |
20074 | case DW_OP_lit16: | |
20075 | case DW_OP_lit17: | |
20076 | case DW_OP_lit18: | |
20077 | case DW_OP_lit19: | |
20078 | case DW_OP_lit20: | |
20079 | case DW_OP_lit21: | |
20080 | case DW_OP_lit22: | |
20081 | case DW_OP_lit23: | |
20082 | case DW_OP_lit24: | |
20083 | case DW_OP_lit25: | |
20084 | case DW_OP_lit26: | |
20085 | case DW_OP_lit27: | |
20086 | case DW_OP_lit28: | |
20087 | case DW_OP_lit29: | |
20088 | case DW_OP_lit30: | |
20089 | case DW_OP_lit31: | |
20090 | stack[++stacki] = op - DW_OP_lit0; | |
20091 | break; | |
f1bea926 | 20092 | |
21ae7a4d JK |
20093 | case DW_OP_reg0: |
20094 | case DW_OP_reg1: | |
20095 | case DW_OP_reg2: | |
20096 | case DW_OP_reg3: | |
20097 | case DW_OP_reg4: | |
20098 | case DW_OP_reg5: | |
20099 | case DW_OP_reg6: | |
20100 | case DW_OP_reg7: | |
20101 | case DW_OP_reg8: | |
20102 | case DW_OP_reg9: | |
20103 | case DW_OP_reg10: | |
20104 | case DW_OP_reg11: | |
20105 | case DW_OP_reg12: | |
20106 | case DW_OP_reg13: | |
20107 | case DW_OP_reg14: | |
20108 | case DW_OP_reg15: | |
20109 | case DW_OP_reg16: | |
20110 | case DW_OP_reg17: | |
20111 | case DW_OP_reg18: | |
20112 | case DW_OP_reg19: | |
20113 | case DW_OP_reg20: | |
20114 | case DW_OP_reg21: | |
20115 | case DW_OP_reg22: | |
20116 | case DW_OP_reg23: | |
20117 | case DW_OP_reg24: | |
20118 | case DW_OP_reg25: | |
20119 | case DW_OP_reg26: | |
20120 | case DW_OP_reg27: | |
20121 | case DW_OP_reg28: | |
20122 | case DW_OP_reg29: | |
20123 | case DW_OP_reg30: | |
20124 | case DW_OP_reg31: | |
20125 | stack[++stacki] = op - DW_OP_reg0; | |
20126 | if (i < size) | |
20127 | dwarf2_complex_location_expr_complaint (); | |
20128 | break; | |
c906108c | 20129 | |
21ae7a4d JK |
20130 | case DW_OP_regx: |
20131 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
20132 | i += bytes_read; | |
20133 | stack[++stacki] = unsnd; | |
20134 | if (i < size) | |
20135 | dwarf2_complex_location_expr_complaint (); | |
20136 | break; | |
c906108c | 20137 | |
21ae7a4d JK |
20138 | case DW_OP_addr: |
20139 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
20140 | cu, &bytes_read); | |
20141 | i += bytes_read; | |
20142 | break; | |
d53d4ac5 | 20143 | |
21ae7a4d JK |
20144 | case DW_OP_const1u: |
20145 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
20146 | i += 1; | |
20147 | break; | |
20148 | ||
20149 | case DW_OP_const1s: | |
20150 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
20151 | i += 1; | |
20152 | break; | |
20153 | ||
20154 | case DW_OP_const2u: | |
20155 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
20156 | i += 2; | |
20157 | break; | |
20158 | ||
20159 | case DW_OP_const2s: | |
20160 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
20161 | i += 2; | |
20162 | break; | |
d53d4ac5 | 20163 | |
21ae7a4d JK |
20164 | case DW_OP_const4u: |
20165 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
20166 | i += 4; | |
20167 | break; | |
20168 | ||
20169 | case DW_OP_const4s: | |
20170 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
20171 | i += 4; | |
20172 | break; | |
20173 | ||
585861ea JK |
20174 | case DW_OP_const8u: |
20175 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
20176 | i += 8; | |
20177 | break; | |
20178 | ||
21ae7a4d JK |
20179 | case DW_OP_constu: |
20180 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
20181 | &bytes_read); | |
20182 | i += bytes_read; | |
20183 | break; | |
20184 | ||
20185 | case DW_OP_consts: | |
20186 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
20187 | i += bytes_read; | |
20188 | break; | |
20189 | ||
20190 | case DW_OP_dup: | |
20191 | stack[stacki + 1] = stack[stacki]; | |
20192 | stacki++; | |
20193 | break; | |
20194 | ||
20195 | case DW_OP_plus: | |
20196 | stack[stacki - 1] += stack[stacki]; | |
20197 | stacki--; | |
20198 | break; | |
20199 | ||
20200 | case DW_OP_plus_uconst: | |
20201 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
20202 | &bytes_read); | |
20203 | i += bytes_read; | |
20204 | break; | |
20205 | ||
20206 | case DW_OP_minus: | |
20207 | stack[stacki - 1] -= stack[stacki]; | |
20208 | stacki--; | |
20209 | break; | |
20210 | ||
20211 | case DW_OP_deref: | |
20212 | /* If we're not the last op, then we definitely can't encode | |
20213 | this using GDB's address_class enum. This is valid for partial | |
20214 | global symbols, although the variable's address will be bogus | |
20215 | in the psymtab. */ | |
20216 | if (i < size) | |
20217 | dwarf2_complex_location_expr_complaint (); | |
20218 | break; | |
20219 | ||
20220 | case DW_OP_GNU_push_tls_address: | |
20221 | /* The top of the stack has the offset from the beginning | |
20222 | of the thread control block at which the variable is located. */ | |
20223 | /* Nothing should follow this operator, so the top of stack would | |
20224 | be returned. */ | |
20225 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
20226 | address will be bogus in the psymtab. Make it always at least |
20227 | non-zero to not look as a variable garbage collected by linker | |
20228 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
20229 | if (i < size) |
20230 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 20231 | stack[stacki]++; |
21ae7a4d JK |
20232 | break; |
20233 | ||
20234 | case DW_OP_GNU_uninit: | |
20235 | break; | |
20236 | ||
3019eac3 | 20237 | case DW_OP_GNU_addr_index: |
49f6c839 | 20238 | case DW_OP_GNU_const_index: |
3019eac3 DE |
20239 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
20240 | &bytes_read); | |
20241 | i += bytes_read; | |
20242 | break; | |
20243 | ||
21ae7a4d JK |
20244 | default: |
20245 | { | |
f39c6ffd | 20246 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
20247 | |
20248 | if (name) | |
20249 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
20250 | name); | |
20251 | else | |
20252 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
20253 | op); | |
20254 | } | |
20255 | ||
20256 | return (stack[stacki]); | |
d53d4ac5 | 20257 | } |
3c6e0cb3 | 20258 | |
21ae7a4d JK |
20259 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
20260 | outside of the allocated space. Also enforce minimum>0. */ | |
20261 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
20262 | { | |
20263 | complaint (&symfile_complaints, | |
20264 | _("location description stack overflow")); | |
20265 | return 0; | |
20266 | } | |
20267 | ||
20268 | if (stacki <= 0) | |
20269 | { | |
20270 | complaint (&symfile_complaints, | |
20271 | _("location description stack underflow")); | |
20272 | return 0; | |
20273 | } | |
20274 | } | |
20275 | return (stack[stacki]); | |
c906108c SS |
20276 | } |
20277 | ||
20278 | /* memory allocation interface */ | |
20279 | ||
c906108c | 20280 | static struct dwarf_block * |
7b5a2f43 | 20281 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
20282 | { |
20283 | struct dwarf_block *blk; | |
20284 | ||
20285 | blk = (struct dwarf_block *) | |
7b5a2f43 | 20286 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
20287 | return (blk); |
20288 | } | |
20289 | ||
c906108c | 20290 | static struct die_info * |
b60c80d6 | 20291 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
20292 | { |
20293 | struct die_info *die; | |
b60c80d6 DJ |
20294 | size_t size = sizeof (struct die_info); |
20295 | ||
20296 | if (num_attrs > 1) | |
20297 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 20298 | |
b60c80d6 | 20299 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
20300 | memset (die, 0, sizeof (struct die_info)); |
20301 | return (die); | |
20302 | } | |
2e276125 JB |
20303 | |
20304 | \f | |
20305 | /* Macro support. */ | |
20306 | ||
233d95b5 JK |
20307 | /* Return file name relative to the compilation directory of file number I in |
20308 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 20309 | responsible for freeing it. */ |
233d95b5 | 20310 | |
2e276125 | 20311 | static char * |
233d95b5 | 20312 | file_file_name (int file, struct line_header *lh) |
2e276125 | 20313 | { |
6a83a1e6 EZ |
20314 | /* Is the file number a valid index into the line header's file name |
20315 | table? Remember that file numbers start with one, not zero. */ | |
20316 | if (1 <= file && file <= lh->num_file_names) | |
20317 | { | |
20318 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 20319 | |
233d95b5 | 20320 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0) |
6a83a1e6 | 20321 | return xstrdup (fe->name); |
233d95b5 JK |
20322 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
20323 | fe->name, NULL); | |
6a83a1e6 | 20324 | } |
2e276125 JB |
20325 | else |
20326 | { | |
6a83a1e6 EZ |
20327 | /* The compiler produced a bogus file number. We can at least |
20328 | record the macro definitions made in the file, even if we | |
20329 | won't be able to find the file by name. */ | |
20330 | char fake_name[80]; | |
9a619af0 | 20331 | |
8c042590 PM |
20332 | xsnprintf (fake_name, sizeof (fake_name), |
20333 | "<bad macro file number %d>", file); | |
2e276125 | 20334 | |
6e70227d | 20335 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
20336 | _("bad file number in macro information (%d)"), |
20337 | file); | |
2e276125 | 20338 | |
6a83a1e6 | 20339 | return xstrdup (fake_name); |
2e276125 JB |
20340 | } |
20341 | } | |
20342 | ||
233d95b5 JK |
20343 | /* Return the full name of file number I in *LH's file name table. |
20344 | Use COMP_DIR as the name of the current directory of the | |
20345 | compilation. The result is allocated using xmalloc; the caller is | |
20346 | responsible for freeing it. */ | |
20347 | static char * | |
20348 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
20349 | { | |
20350 | /* Is the file number a valid index into the line header's file name | |
20351 | table? Remember that file numbers start with one, not zero. */ | |
20352 | if (1 <= file && file <= lh->num_file_names) | |
20353 | { | |
20354 | char *relative = file_file_name (file, lh); | |
20355 | ||
20356 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
20357 | return relative; | |
20358 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
20359 | } | |
20360 | else | |
20361 | return file_file_name (file, lh); | |
20362 | } | |
20363 | ||
2e276125 JB |
20364 | |
20365 | static struct macro_source_file * | |
20366 | macro_start_file (int file, int line, | |
20367 | struct macro_source_file *current_file, | |
20368 | const char *comp_dir, | |
20369 | struct line_header *lh, struct objfile *objfile) | |
20370 | { | |
233d95b5 JK |
20371 | /* File name relative to the compilation directory of this source file. */ |
20372 | char *file_name = file_file_name (file, lh); | |
2e276125 | 20373 | |
2e276125 | 20374 | if (! current_file) |
abc9d0dc | 20375 | { |
fc474241 DE |
20376 | /* Note: We don't create a macro table for this compilation unit |
20377 | at all until we actually get a filename. */ | |
20378 | struct macro_table *macro_table = get_macro_table (objfile, comp_dir); | |
20379 | ||
abc9d0dc TT |
20380 | /* If we have no current file, then this must be the start_file |
20381 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
20382 | current_file = macro_set_main (macro_table, file_name); |
20383 | macro_define_special (macro_table); | |
abc9d0dc | 20384 | } |
2e276125 | 20385 | else |
233d95b5 | 20386 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 20387 | |
233d95b5 | 20388 | xfree (file_name); |
6e70227d | 20389 | |
2e276125 JB |
20390 | return current_file; |
20391 | } | |
20392 | ||
20393 | ||
20394 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
20395 | followed by a null byte. */ | |
20396 | static char * | |
20397 | copy_string (const char *buf, int len) | |
20398 | { | |
20399 | char *s = xmalloc (len + 1); | |
9a619af0 | 20400 | |
2e276125 JB |
20401 | memcpy (s, buf, len); |
20402 | s[len] = '\0'; | |
2e276125 JB |
20403 | return s; |
20404 | } | |
20405 | ||
20406 | ||
20407 | static const char * | |
20408 | consume_improper_spaces (const char *p, const char *body) | |
20409 | { | |
20410 | if (*p == ' ') | |
20411 | { | |
4d3c2250 | 20412 | complaint (&symfile_complaints, |
3e43a32a MS |
20413 | _("macro definition contains spaces " |
20414 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 20415 | body); |
2e276125 JB |
20416 | |
20417 | while (*p == ' ') | |
20418 | p++; | |
20419 | } | |
20420 | ||
20421 | return p; | |
20422 | } | |
20423 | ||
20424 | ||
20425 | static void | |
20426 | parse_macro_definition (struct macro_source_file *file, int line, | |
20427 | const char *body) | |
20428 | { | |
20429 | const char *p; | |
20430 | ||
20431 | /* The body string takes one of two forms. For object-like macro | |
20432 | definitions, it should be: | |
20433 | ||
20434 | <macro name> " " <definition> | |
20435 | ||
20436 | For function-like macro definitions, it should be: | |
20437 | ||
20438 | <macro name> "() " <definition> | |
20439 | or | |
20440 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
20441 | ||
20442 | Spaces may appear only where explicitly indicated, and in the | |
20443 | <definition>. | |
20444 | ||
20445 | The Dwarf 2 spec says that an object-like macro's name is always | |
20446 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 20447 | the space when the macro's definition is the empty string. |
2e276125 JB |
20448 | |
20449 | The Dwarf 2 spec says that there should be no spaces between the | |
20450 | formal arguments in a function-like macro's formal argument list, | |
20451 | but versions of GCC around March 2002 include spaces after the | |
20452 | commas. */ | |
20453 | ||
20454 | ||
20455 | /* Find the extent of the macro name. The macro name is terminated | |
20456 | by either a space or null character (for an object-like macro) or | |
20457 | an opening paren (for a function-like macro). */ | |
20458 | for (p = body; *p; p++) | |
20459 | if (*p == ' ' || *p == '(') | |
20460 | break; | |
20461 | ||
20462 | if (*p == ' ' || *p == '\0') | |
20463 | { | |
20464 | /* It's an object-like macro. */ | |
20465 | int name_len = p - body; | |
20466 | char *name = copy_string (body, name_len); | |
20467 | const char *replacement; | |
20468 | ||
20469 | if (*p == ' ') | |
20470 | replacement = body + name_len + 1; | |
20471 | else | |
20472 | { | |
4d3c2250 | 20473 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20474 | replacement = body + name_len; |
20475 | } | |
6e70227d | 20476 | |
2e276125 JB |
20477 | macro_define_object (file, line, name, replacement); |
20478 | ||
20479 | xfree (name); | |
20480 | } | |
20481 | else if (*p == '(') | |
20482 | { | |
20483 | /* It's a function-like macro. */ | |
20484 | char *name = copy_string (body, p - body); | |
20485 | int argc = 0; | |
20486 | int argv_size = 1; | |
20487 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
20488 | ||
20489 | p++; | |
20490 | ||
20491 | p = consume_improper_spaces (p, body); | |
20492 | ||
20493 | /* Parse the formal argument list. */ | |
20494 | while (*p && *p != ')') | |
20495 | { | |
20496 | /* Find the extent of the current argument name. */ | |
20497 | const char *arg_start = p; | |
20498 | ||
20499 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
20500 | p++; | |
20501 | ||
20502 | if (! *p || p == arg_start) | |
4d3c2250 | 20503 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20504 | else |
20505 | { | |
20506 | /* Make sure argv has room for the new argument. */ | |
20507 | if (argc >= argv_size) | |
20508 | { | |
20509 | argv_size *= 2; | |
20510 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
20511 | } | |
20512 | ||
20513 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
20514 | } | |
20515 | ||
20516 | p = consume_improper_spaces (p, body); | |
20517 | ||
20518 | /* Consume the comma, if present. */ | |
20519 | if (*p == ',') | |
20520 | { | |
20521 | p++; | |
20522 | ||
20523 | p = consume_improper_spaces (p, body); | |
20524 | } | |
20525 | } | |
20526 | ||
20527 | if (*p == ')') | |
20528 | { | |
20529 | p++; | |
20530 | ||
20531 | if (*p == ' ') | |
20532 | /* Perfectly formed definition, no complaints. */ | |
20533 | macro_define_function (file, line, name, | |
6e70227d | 20534 | argc, (const char **) argv, |
2e276125 JB |
20535 | p + 1); |
20536 | else if (*p == '\0') | |
20537 | { | |
20538 | /* Complain, but do define it. */ | |
4d3c2250 | 20539 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 20540 | macro_define_function (file, line, name, |
6e70227d | 20541 | argc, (const char **) argv, |
2e276125 JB |
20542 | p); |
20543 | } | |
20544 | else | |
20545 | /* Just complain. */ | |
4d3c2250 | 20546 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20547 | } |
20548 | else | |
20549 | /* Just complain. */ | |
4d3c2250 | 20550 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20551 | |
20552 | xfree (name); | |
20553 | { | |
20554 | int i; | |
20555 | ||
20556 | for (i = 0; i < argc; i++) | |
20557 | xfree (argv[i]); | |
20558 | } | |
20559 | xfree (argv); | |
20560 | } | |
20561 | else | |
4d3c2250 | 20562 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20563 | } |
20564 | ||
cf2c3c16 TT |
20565 | /* Skip some bytes from BYTES according to the form given in FORM. |
20566 | Returns the new pointer. */ | |
2e276125 | 20567 | |
d521ce57 TT |
20568 | static const gdb_byte * |
20569 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
20570 | enum dwarf_form form, |
20571 | unsigned int offset_size, | |
20572 | struct dwarf2_section_info *section) | |
2e276125 | 20573 | { |
cf2c3c16 | 20574 | unsigned int bytes_read; |
2e276125 | 20575 | |
cf2c3c16 | 20576 | switch (form) |
2e276125 | 20577 | { |
cf2c3c16 TT |
20578 | case DW_FORM_data1: |
20579 | case DW_FORM_flag: | |
20580 | ++bytes; | |
20581 | break; | |
20582 | ||
20583 | case DW_FORM_data2: | |
20584 | bytes += 2; | |
20585 | break; | |
20586 | ||
20587 | case DW_FORM_data4: | |
20588 | bytes += 4; | |
20589 | break; | |
20590 | ||
20591 | case DW_FORM_data8: | |
20592 | bytes += 8; | |
20593 | break; | |
20594 | ||
20595 | case DW_FORM_string: | |
20596 | read_direct_string (abfd, bytes, &bytes_read); | |
20597 | bytes += bytes_read; | |
20598 | break; | |
20599 | ||
20600 | case DW_FORM_sec_offset: | |
20601 | case DW_FORM_strp: | |
36586728 | 20602 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
20603 | bytes += offset_size; |
20604 | break; | |
20605 | ||
20606 | case DW_FORM_block: | |
20607 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
20608 | bytes += bytes_read; | |
20609 | break; | |
20610 | ||
20611 | case DW_FORM_block1: | |
20612 | bytes += 1 + read_1_byte (abfd, bytes); | |
20613 | break; | |
20614 | case DW_FORM_block2: | |
20615 | bytes += 2 + read_2_bytes (abfd, bytes); | |
20616 | break; | |
20617 | case DW_FORM_block4: | |
20618 | bytes += 4 + read_4_bytes (abfd, bytes); | |
20619 | break; | |
20620 | ||
20621 | case DW_FORM_sdata: | |
20622 | case DW_FORM_udata: | |
3019eac3 DE |
20623 | case DW_FORM_GNU_addr_index: |
20624 | case DW_FORM_GNU_str_index: | |
d521ce57 | 20625 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
20626 | if (bytes == NULL) |
20627 | { | |
20628 | dwarf2_section_buffer_overflow_complaint (section); | |
20629 | return NULL; | |
20630 | } | |
cf2c3c16 TT |
20631 | break; |
20632 | ||
20633 | default: | |
20634 | { | |
20635 | complain: | |
20636 | complaint (&symfile_complaints, | |
20637 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 20638 | form, get_section_name (section)); |
cf2c3c16 TT |
20639 | return NULL; |
20640 | } | |
2e276125 JB |
20641 | } |
20642 | ||
cf2c3c16 TT |
20643 | return bytes; |
20644 | } | |
757a13d0 | 20645 | |
cf2c3c16 TT |
20646 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
20647 | opcode. Returns an updated pointer to the macro data buffer; or, | |
20648 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 20649 | |
d521ce57 | 20650 | static const gdb_byte * |
cf2c3c16 | 20651 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
20652 | const gdb_byte **opcode_definitions, |
20653 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
20654 | bfd *abfd, |
20655 | unsigned int offset_size, | |
20656 | struct dwarf2_section_info *section) | |
20657 | { | |
20658 | unsigned int bytes_read, i; | |
20659 | unsigned long arg; | |
d521ce57 | 20660 | const gdb_byte *defn; |
2e276125 | 20661 | |
cf2c3c16 | 20662 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 20663 | { |
cf2c3c16 TT |
20664 | complaint (&symfile_complaints, |
20665 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
20666 | opcode); | |
20667 | return NULL; | |
20668 | } | |
2e276125 | 20669 | |
cf2c3c16 TT |
20670 | defn = opcode_definitions[opcode]; |
20671 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
20672 | defn += bytes_read; | |
2e276125 | 20673 | |
cf2c3c16 TT |
20674 | for (i = 0; i < arg; ++i) |
20675 | { | |
f664829e DE |
20676 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
20677 | section); | |
cf2c3c16 TT |
20678 | if (mac_ptr == NULL) |
20679 | { | |
20680 | /* skip_form_bytes already issued the complaint. */ | |
20681 | return NULL; | |
20682 | } | |
20683 | } | |
757a13d0 | 20684 | |
cf2c3c16 TT |
20685 | return mac_ptr; |
20686 | } | |
757a13d0 | 20687 | |
cf2c3c16 TT |
20688 | /* A helper function which parses the header of a macro section. |
20689 | If the macro section is the extended (for now called "GNU") type, | |
20690 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
20691 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 20692 | |
d521ce57 TT |
20693 | static const gdb_byte * |
20694 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 20695 | bfd *abfd, |
d521ce57 | 20696 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
20697 | unsigned int *offset_size, |
20698 | int section_is_gnu) | |
20699 | { | |
20700 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 20701 | |
cf2c3c16 TT |
20702 | if (section_is_gnu) |
20703 | { | |
20704 | unsigned int version, flags; | |
757a13d0 | 20705 | |
cf2c3c16 TT |
20706 | version = read_2_bytes (abfd, mac_ptr); |
20707 | if (version != 4) | |
20708 | { | |
20709 | complaint (&symfile_complaints, | |
20710 | _("unrecognized version `%d' in .debug_macro section"), | |
20711 | version); | |
20712 | return NULL; | |
20713 | } | |
20714 | mac_ptr += 2; | |
757a13d0 | 20715 | |
cf2c3c16 TT |
20716 | flags = read_1_byte (abfd, mac_ptr); |
20717 | ++mac_ptr; | |
20718 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 20719 | |
cf2c3c16 TT |
20720 | if ((flags & 2) != 0) |
20721 | /* We don't need the line table offset. */ | |
20722 | mac_ptr += *offset_size; | |
757a13d0 | 20723 | |
cf2c3c16 TT |
20724 | /* Vendor opcode descriptions. */ |
20725 | if ((flags & 4) != 0) | |
20726 | { | |
20727 | unsigned int i, count; | |
757a13d0 | 20728 | |
cf2c3c16 TT |
20729 | count = read_1_byte (abfd, mac_ptr); |
20730 | ++mac_ptr; | |
20731 | for (i = 0; i < count; ++i) | |
20732 | { | |
20733 | unsigned int opcode, bytes_read; | |
20734 | unsigned long arg; | |
20735 | ||
20736 | opcode = read_1_byte (abfd, mac_ptr); | |
20737 | ++mac_ptr; | |
20738 | opcode_definitions[opcode] = mac_ptr; | |
20739 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20740 | mac_ptr += bytes_read; | |
20741 | mac_ptr += arg; | |
20742 | } | |
757a13d0 | 20743 | } |
cf2c3c16 | 20744 | } |
757a13d0 | 20745 | |
cf2c3c16 TT |
20746 | return mac_ptr; |
20747 | } | |
757a13d0 | 20748 | |
cf2c3c16 | 20749 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 20750 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
20751 | |
20752 | static void | |
d521ce57 TT |
20753 | dwarf_decode_macro_bytes (bfd *abfd, |
20754 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 20755 | struct macro_source_file *current_file, |
15d034d0 | 20756 | struct line_header *lh, const char *comp_dir, |
cf2c3c16 | 20757 | struct dwarf2_section_info *section, |
36586728 | 20758 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 20759 | unsigned int offset_size, |
8fc3fc34 TT |
20760 | struct objfile *objfile, |
20761 | htab_t include_hash) | |
cf2c3c16 TT |
20762 | { |
20763 | enum dwarf_macro_record_type macinfo_type; | |
20764 | int at_commandline; | |
d521ce57 | 20765 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 20766 | |
cf2c3c16 TT |
20767 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
20768 | &offset_size, section_is_gnu); | |
20769 | if (mac_ptr == NULL) | |
20770 | { | |
20771 | /* We already issued a complaint. */ | |
20772 | return; | |
20773 | } | |
757a13d0 JK |
20774 | |
20775 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
20776 | GDB is still reading the definitions from command line. First | |
20777 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
20778 | to create CURRENT_FILE for the main source holding also the command line | |
20779 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
20780 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
20781 | ||
20782 | at_commandline = 1; | |
20783 | ||
20784 | do | |
20785 | { | |
20786 | /* Do we at least have room for a macinfo type byte? */ | |
20787 | if (mac_ptr >= mac_end) | |
20788 | { | |
f664829e | 20789 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
20790 | break; |
20791 | } | |
20792 | ||
20793 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
20794 | mac_ptr++; | |
20795 | ||
cf2c3c16 TT |
20796 | /* Note that we rely on the fact that the corresponding GNU and |
20797 | DWARF constants are the same. */ | |
757a13d0 JK |
20798 | switch (macinfo_type) |
20799 | { | |
20800 | /* A zero macinfo type indicates the end of the macro | |
20801 | information. */ | |
20802 | case 0: | |
20803 | break; | |
2e276125 | 20804 | |
cf2c3c16 TT |
20805 | case DW_MACRO_GNU_define: |
20806 | case DW_MACRO_GNU_undef: | |
20807 | case DW_MACRO_GNU_define_indirect: | |
20808 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
20809 | case DW_MACRO_GNU_define_indirect_alt: |
20810 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 20811 | { |
891d2f0b | 20812 | unsigned int bytes_read; |
2e276125 | 20813 | int line; |
d521ce57 | 20814 | const char *body; |
cf2c3c16 | 20815 | int is_define; |
2e276125 | 20816 | |
cf2c3c16 TT |
20817 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
20818 | mac_ptr += bytes_read; | |
20819 | ||
20820 | if (macinfo_type == DW_MACRO_GNU_define | |
20821 | || macinfo_type == DW_MACRO_GNU_undef) | |
20822 | { | |
20823 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
20824 | mac_ptr += bytes_read; | |
20825 | } | |
20826 | else | |
20827 | { | |
20828 | LONGEST str_offset; | |
20829 | ||
20830 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
20831 | mac_ptr += offset_size; | |
2e276125 | 20832 | |
36586728 | 20833 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
20834 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
20835 | || section_is_dwz) | |
36586728 TT |
20836 | { |
20837 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
20838 | ||
20839 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
20840 | } | |
20841 | else | |
20842 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
20843 | } |
20844 | ||
20845 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
20846 | || macinfo_type == DW_MACRO_GNU_define_indirect |
20847 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 20848 | if (! current_file) |
757a13d0 JK |
20849 | { |
20850 | /* DWARF violation as no main source is present. */ | |
20851 | complaint (&symfile_complaints, | |
20852 | _("debug info with no main source gives macro %s " | |
20853 | "on line %d: %s"), | |
cf2c3c16 TT |
20854 | is_define ? _("definition") : _("undefinition"), |
20855 | line, body); | |
757a13d0 JK |
20856 | break; |
20857 | } | |
3e43a32a MS |
20858 | if ((line == 0 && !at_commandline) |
20859 | || (line != 0 && at_commandline)) | |
4d3c2250 | 20860 | complaint (&symfile_complaints, |
757a13d0 JK |
20861 | _("debug info gives %s macro %s with %s line %d: %s"), |
20862 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 20863 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
20864 | line == 0 ? _("zero") : _("non-zero"), line, body); |
20865 | ||
cf2c3c16 | 20866 | if (is_define) |
757a13d0 | 20867 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
20868 | else |
20869 | { | |
20870 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
20871 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
20872 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
20873 | macro_undef (current_file, line, body); |
20874 | } | |
2e276125 JB |
20875 | } |
20876 | break; | |
20877 | ||
cf2c3c16 | 20878 | case DW_MACRO_GNU_start_file: |
2e276125 | 20879 | { |
891d2f0b | 20880 | unsigned int bytes_read; |
2e276125 JB |
20881 | int line, file; |
20882 | ||
20883 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20884 | mac_ptr += bytes_read; | |
20885 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20886 | mac_ptr += bytes_read; | |
20887 | ||
3e43a32a MS |
20888 | if ((line == 0 && !at_commandline) |
20889 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
20890 | complaint (&symfile_complaints, |
20891 | _("debug info gives source %d included " | |
20892 | "from %s at %s line %d"), | |
20893 | file, at_commandline ? _("command-line") : _("file"), | |
20894 | line == 0 ? _("zero") : _("non-zero"), line); | |
20895 | ||
20896 | if (at_commandline) | |
20897 | { | |
cf2c3c16 TT |
20898 | /* This DW_MACRO_GNU_start_file was executed in the |
20899 | pass one. */ | |
757a13d0 JK |
20900 | at_commandline = 0; |
20901 | } | |
20902 | else | |
20903 | current_file = macro_start_file (file, line, | |
20904 | current_file, comp_dir, | |
cf2c3c16 | 20905 | lh, objfile); |
2e276125 JB |
20906 | } |
20907 | break; | |
20908 | ||
cf2c3c16 | 20909 | case DW_MACRO_GNU_end_file: |
2e276125 | 20910 | if (! current_file) |
4d3c2250 | 20911 | complaint (&symfile_complaints, |
3e43a32a MS |
20912 | _("macro debug info has an unmatched " |
20913 | "`close_file' directive")); | |
2e276125 JB |
20914 | else |
20915 | { | |
20916 | current_file = current_file->included_by; | |
20917 | if (! current_file) | |
20918 | { | |
cf2c3c16 | 20919 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
20920 | |
20921 | /* GCC circa March 2002 doesn't produce the zero | |
20922 | type byte marking the end of the compilation | |
20923 | unit. Complain if it's not there, but exit no | |
20924 | matter what. */ | |
20925 | ||
20926 | /* Do we at least have room for a macinfo type byte? */ | |
20927 | if (mac_ptr >= mac_end) | |
20928 | { | |
f664829e | 20929 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
20930 | return; |
20931 | } | |
20932 | ||
20933 | /* We don't increment mac_ptr here, so this is just | |
20934 | a look-ahead. */ | |
20935 | next_type = read_1_byte (abfd, mac_ptr); | |
20936 | if (next_type != 0) | |
4d3c2250 | 20937 | complaint (&symfile_complaints, |
3e43a32a MS |
20938 | _("no terminating 0-type entry for " |
20939 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
20940 | |
20941 | return; | |
20942 | } | |
20943 | } | |
20944 | break; | |
20945 | ||
cf2c3c16 | 20946 | case DW_MACRO_GNU_transparent_include: |
36586728 | 20947 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
20948 | { |
20949 | LONGEST offset; | |
8fc3fc34 | 20950 | void **slot; |
a036ba48 TT |
20951 | bfd *include_bfd = abfd; |
20952 | struct dwarf2_section_info *include_section = section; | |
20953 | struct dwarf2_section_info alt_section; | |
d521ce57 | 20954 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 20955 | int is_dwz = section_is_dwz; |
d521ce57 | 20956 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
20957 | |
20958 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
20959 | mac_ptr += offset_size; | |
20960 | ||
a036ba48 TT |
20961 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
20962 | { | |
20963 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
20964 | ||
20965 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
20966 | &dwz->macro); | |
20967 | ||
a036ba48 | 20968 | include_section = &dwz->macro; |
a32a8923 | 20969 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
20970 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
20971 | is_dwz = 1; | |
20972 | } | |
20973 | ||
20974 | new_mac_ptr = include_section->buffer + offset; | |
20975 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
20976 | ||
8fc3fc34 TT |
20977 | if (*slot != NULL) |
20978 | { | |
20979 | /* This has actually happened; see | |
20980 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
20981 | complaint (&symfile_complaints, | |
20982 | _("recursive DW_MACRO_GNU_transparent_include in " | |
20983 | ".debug_macro section")); | |
20984 | } | |
20985 | else | |
20986 | { | |
d521ce57 | 20987 | *slot = (void *) new_mac_ptr; |
36586728 | 20988 | |
a036ba48 | 20989 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 20990 | include_mac_end, current_file, |
8fc3fc34 | 20991 | lh, comp_dir, |
36586728 | 20992 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
20993 | offset_size, objfile, include_hash); |
20994 | ||
d521ce57 | 20995 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 20996 | } |
cf2c3c16 TT |
20997 | } |
20998 | break; | |
20999 | ||
2e276125 | 21000 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
21001 | if (!section_is_gnu) |
21002 | { | |
21003 | unsigned int bytes_read; | |
21004 | int constant; | |
2e276125 | 21005 | |
cf2c3c16 TT |
21006 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
21007 | mac_ptr += bytes_read; | |
21008 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21009 | mac_ptr += bytes_read; | |
2e276125 | 21010 | |
cf2c3c16 TT |
21011 | /* We don't recognize any vendor extensions. */ |
21012 | break; | |
21013 | } | |
21014 | /* FALLTHROUGH */ | |
21015 | ||
21016 | default: | |
21017 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21018 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21019 | section); |
21020 | if (mac_ptr == NULL) | |
21021 | return; | |
21022 | break; | |
2e276125 | 21023 | } |
757a13d0 | 21024 | } while (macinfo_type != 0); |
2e276125 | 21025 | } |
8e19ed76 | 21026 | |
cf2c3c16 | 21027 | static void |
09262596 | 21028 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
15d034d0 | 21029 | const char *comp_dir, int section_is_gnu) |
cf2c3c16 | 21030 | { |
bb5ed363 | 21031 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
21032 | struct line_header *lh = cu->line_header; |
21033 | bfd *abfd; | |
d521ce57 | 21034 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
21035 | struct macro_source_file *current_file = 0; |
21036 | enum dwarf_macro_record_type macinfo_type; | |
21037 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 21038 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
21039 | struct cleanup *cleanup; |
21040 | htab_t include_hash; | |
21041 | void **slot; | |
09262596 DE |
21042 | struct dwarf2_section_info *section; |
21043 | const char *section_name; | |
21044 | ||
21045 | if (cu->dwo_unit != NULL) | |
21046 | { | |
21047 | if (section_is_gnu) | |
21048 | { | |
21049 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
21050 | section_name = ".debug_macro.dwo"; | |
21051 | } | |
21052 | else | |
21053 | { | |
21054 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
21055 | section_name = ".debug_macinfo.dwo"; | |
21056 | } | |
21057 | } | |
21058 | else | |
21059 | { | |
21060 | if (section_is_gnu) | |
21061 | { | |
21062 | section = &dwarf2_per_objfile->macro; | |
21063 | section_name = ".debug_macro"; | |
21064 | } | |
21065 | else | |
21066 | { | |
21067 | section = &dwarf2_per_objfile->macinfo; | |
21068 | section_name = ".debug_macinfo"; | |
21069 | } | |
21070 | } | |
cf2c3c16 | 21071 | |
bb5ed363 | 21072 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
21073 | if (section->buffer == NULL) |
21074 | { | |
fceca515 | 21075 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
21076 | return; |
21077 | } | |
a32a8923 | 21078 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
21079 | |
21080 | /* First pass: Find the name of the base filename. | |
21081 | This filename is needed in order to process all macros whose definition | |
21082 | (or undefinition) comes from the command line. These macros are defined | |
21083 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
21084 | associated to the base file. | |
21085 | ||
21086 | To determine the base file name, we scan the macro definitions until we | |
21087 | reach the first DW_MACINFO_start_file entry. We then initialize | |
21088 | CURRENT_FILE accordingly so that any macro definition found before the | |
21089 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
21090 | ||
21091 | mac_ptr = section->buffer + offset; | |
21092 | mac_end = section->buffer + section->size; | |
21093 | ||
21094 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
21095 | &offset_size, section_is_gnu); | |
21096 | if (mac_ptr == NULL) | |
21097 | { | |
21098 | /* We already issued a complaint. */ | |
21099 | return; | |
21100 | } | |
21101 | ||
21102 | do | |
21103 | { | |
21104 | /* Do we at least have room for a macinfo type byte? */ | |
21105 | if (mac_ptr >= mac_end) | |
21106 | { | |
21107 | /* Complaint is printed during the second pass as GDB will probably | |
21108 | stop the first pass earlier upon finding | |
21109 | DW_MACINFO_start_file. */ | |
21110 | break; | |
21111 | } | |
21112 | ||
21113 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
21114 | mac_ptr++; | |
21115 | ||
21116 | /* Note that we rely on the fact that the corresponding GNU and | |
21117 | DWARF constants are the same. */ | |
21118 | switch (macinfo_type) | |
21119 | { | |
21120 | /* A zero macinfo type indicates the end of the macro | |
21121 | information. */ | |
21122 | case 0: | |
21123 | break; | |
21124 | ||
21125 | case DW_MACRO_GNU_define: | |
21126 | case DW_MACRO_GNU_undef: | |
21127 | /* Only skip the data by MAC_PTR. */ | |
21128 | { | |
21129 | unsigned int bytes_read; | |
21130 | ||
21131 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21132 | mac_ptr += bytes_read; | |
21133 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21134 | mac_ptr += bytes_read; | |
21135 | } | |
21136 | break; | |
21137 | ||
21138 | case DW_MACRO_GNU_start_file: | |
21139 | { | |
21140 | unsigned int bytes_read; | |
21141 | int line, file; | |
21142 | ||
21143 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21144 | mac_ptr += bytes_read; | |
21145 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21146 | mac_ptr += bytes_read; | |
21147 | ||
21148 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 21149 | comp_dir, lh, objfile); |
cf2c3c16 TT |
21150 | } |
21151 | break; | |
21152 | ||
21153 | case DW_MACRO_GNU_end_file: | |
21154 | /* No data to skip by MAC_PTR. */ | |
21155 | break; | |
21156 | ||
21157 | case DW_MACRO_GNU_define_indirect: | |
21158 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
21159 | case DW_MACRO_GNU_define_indirect_alt: |
21160 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
21161 | { |
21162 | unsigned int bytes_read; | |
21163 | ||
21164 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21165 | mac_ptr += bytes_read; | |
21166 | mac_ptr += offset_size; | |
21167 | } | |
21168 | break; | |
21169 | ||
21170 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 21171 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
21172 | /* Note that, according to the spec, a transparent include |
21173 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
21174 | skip this opcode. */ | |
21175 | mac_ptr += offset_size; | |
21176 | break; | |
21177 | ||
21178 | case DW_MACINFO_vendor_ext: | |
21179 | /* Only skip the data by MAC_PTR. */ | |
21180 | if (!section_is_gnu) | |
21181 | { | |
21182 | unsigned int bytes_read; | |
21183 | ||
21184 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
21185 | mac_ptr += bytes_read; | |
21186 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
21187 | mac_ptr += bytes_read; | |
21188 | } | |
21189 | /* FALLTHROUGH */ | |
21190 | ||
21191 | default: | |
21192 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 21193 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
21194 | section); |
21195 | if (mac_ptr == NULL) | |
21196 | return; | |
21197 | break; | |
21198 | } | |
21199 | } while (macinfo_type != 0 && current_file == NULL); | |
21200 | ||
21201 | /* Second pass: Process all entries. | |
21202 | ||
21203 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
21204 | command-line macro definitions/undefinitions. This flag is unset when we | |
21205 | reach the first DW_MACINFO_start_file entry. */ | |
21206 | ||
8fc3fc34 TT |
21207 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
21208 | NULL, xcalloc, xfree); | |
21209 | cleanup = make_cleanup_htab_delete (include_hash); | |
21210 | mac_ptr = section->buffer + offset; | |
21211 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 21212 | *slot = (void *) mac_ptr; |
8fc3fc34 | 21213 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
36586728 TT |
21214 | current_file, lh, comp_dir, section, |
21215 | section_is_gnu, 0, | |
8fc3fc34 TT |
21216 | offset_size, objfile, include_hash); |
21217 | do_cleanups (cleanup); | |
cf2c3c16 TT |
21218 | } |
21219 | ||
8e19ed76 | 21220 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 21221 | if so return true else false. */ |
380bca97 | 21222 | |
8e19ed76 | 21223 | static int |
6e5a29e1 | 21224 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
21225 | { |
21226 | return (attr == NULL ? 0 : | |
21227 | attr->form == DW_FORM_block1 | |
21228 | || attr->form == DW_FORM_block2 | |
21229 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
21230 | || attr->form == DW_FORM_block |
21231 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 21232 | } |
4c2df51b | 21233 | |
c6a0999f JB |
21234 | /* Return non-zero if ATTR's value is a section offset --- classes |
21235 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
21236 | You may use DW_UNSND (attr) to retrieve such offsets. | |
21237 | ||
21238 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
21239 | may have a value that belongs to more than one of these classes; it | |
21240 | would be ambiguous if we did, because we use the same forms for all | |
21241 | of them. */ | |
380bca97 | 21242 | |
3690dd37 | 21243 | static int |
6e5a29e1 | 21244 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
21245 | { |
21246 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
21247 | || attr->form == DW_FORM_data8 |
21248 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
21249 | } |
21250 | ||
3690dd37 JB |
21251 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
21252 | zero otherwise. When this function returns true, you can apply | |
21253 | dwarf2_get_attr_constant_value to it. | |
21254 | ||
21255 | However, note that for some attributes you must check | |
21256 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
21257 | and DW_FORM_data8 are members of both the constant class, and of | |
21258 | the classes that contain offsets into other debug sections | |
21259 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
21260 | that, if an attribute's can be either a constant or one of the | |
21261 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
21262 | taken as section offsets, not constants. */ | |
380bca97 | 21263 | |
3690dd37 | 21264 | static int |
6e5a29e1 | 21265 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
21266 | { |
21267 | switch (attr->form) | |
21268 | { | |
21269 | case DW_FORM_sdata: | |
21270 | case DW_FORM_udata: | |
21271 | case DW_FORM_data1: | |
21272 | case DW_FORM_data2: | |
21273 | case DW_FORM_data4: | |
21274 | case DW_FORM_data8: | |
21275 | return 1; | |
21276 | default: | |
21277 | return 0; | |
21278 | } | |
21279 | } | |
21280 | ||
7771576e SA |
21281 | |
21282 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
21283 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
21284 | ||
21285 | static int | |
6e5a29e1 | 21286 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
21287 | { |
21288 | switch (attr->form) | |
21289 | { | |
21290 | case DW_FORM_ref_addr: | |
21291 | case DW_FORM_ref1: | |
21292 | case DW_FORM_ref2: | |
21293 | case DW_FORM_ref4: | |
21294 | case DW_FORM_ref8: | |
21295 | case DW_FORM_ref_udata: | |
21296 | case DW_FORM_GNU_ref_alt: | |
21297 | return 1; | |
21298 | default: | |
21299 | return 0; | |
21300 | } | |
21301 | } | |
21302 | ||
3019eac3 DE |
21303 | /* Return the .debug_loc section to use for CU. |
21304 | For DWO files use .debug_loc.dwo. */ | |
21305 | ||
21306 | static struct dwarf2_section_info * | |
21307 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
21308 | { | |
21309 | if (cu->dwo_unit) | |
21310 | return &cu->dwo_unit->dwo_file->sections.loc; | |
21311 | return &dwarf2_per_objfile->loc; | |
21312 | } | |
21313 | ||
8cf6f0b1 TT |
21314 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
21315 | ||
21316 | static void | |
21317 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
21318 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 21319 | const struct attribute *attr) |
8cf6f0b1 | 21320 | { |
3019eac3 DE |
21321 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
21322 | ||
21323 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
21324 | |
21325 | baton->per_cu = cu->per_cu; | |
21326 | gdb_assert (baton->per_cu); | |
21327 | /* We don't know how long the location list is, but make sure we | |
21328 | don't run off the edge of the section. */ | |
3019eac3 DE |
21329 | baton->size = section->size - DW_UNSND (attr); |
21330 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 21331 | baton->base_address = cu->base_address; |
f664829e | 21332 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
21333 | } |
21334 | ||
4c2df51b | 21335 | static void |
ff39bb5e | 21336 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 21337 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 21338 | { |
bb5ed363 | 21339 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 21340 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 21341 | |
3690dd37 | 21342 | if (attr_form_is_section_offset (attr) |
3019eac3 | 21343 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
21344 | the section. If so, fall through to the complaint in the |
21345 | other branch. */ | |
3019eac3 | 21346 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 21347 | { |
0d53c4c4 | 21348 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 21349 | |
bb5ed363 | 21350 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 21351 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 21352 | |
8cf6f0b1 | 21353 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 21354 | |
d00adf39 | 21355 | if (cu->base_known == 0) |
0d53c4c4 | 21356 | complaint (&symfile_complaints, |
3e43a32a MS |
21357 | _("Location list used without " |
21358 | "specifying the CU base address.")); | |
4c2df51b | 21359 | |
f1e6e072 TT |
21360 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21361 | ? dwarf2_loclist_block_index | |
21362 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
21363 | SYMBOL_LOCATION_BATON (sym) = baton; |
21364 | } | |
21365 | else | |
21366 | { | |
21367 | struct dwarf2_locexpr_baton *baton; | |
21368 | ||
bb5ed363 | 21369 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 21370 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
21371 | baton->per_cu = cu->per_cu; |
21372 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
21373 | |
21374 | if (attr_form_is_block (attr)) | |
21375 | { | |
21376 | /* Note that we're just copying the block's data pointer | |
21377 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
21378 | info_buffer for SYM's objfile; right now we never release |
21379 | that buffer, but when we do clean up properly this may | |
21380 | need to change. */ | |
0d53c4c4 DJ |
21381 | baton->size = DW_BLOCK (attr)->size; |
21382 | baton->data = DW_BLOCK (attr)->data; | |
21383 | } | |
21384 | else | |
21385 | { | |
21386 | dwarf2_invalid_attrib_class_complaint ("location description", | |
21387 | SYMBOL_NATURAL_NAME (sym)); | |
21388 | baton->size = 0; | |
0d53c4c4 | 21389 | } |
6e70227d | 21390 | |
f1e6e072 TT |
21391 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21392 | ? dwarf2_locexpr_block_index | |
21393 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
21394 | SYMBOL_LOCATION_BATON (sym) = baton; |
21395 | } | |
4c2df51b | 21396 | } |
6502dd73 | 21397 | |
9aa1f1e3 TT |
21398 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
21399 | came from a separate debuginfo file, then the master objfile is | |
21400 | returned. */ | |
ae0d2f24 UW |
21401 | |
21402 | struct objfile * | |
21403 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
21404 | { | |
9291a0cd | 21405 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
21406 | |
21407 | /* Return the master objfile, so that we can report and look up the | |
21408 | correct file containing this variable. */ | |
21409 | if (objfile->separate_debug_objfile_backlink) | |
21410 | objfile = objfile->separate_debug_objfile_backlink; | |
21411 | ||
21412 | return objfile; | |
21413 | } | |
21414 | ||
96408a79 SA |
21415 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
21416 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
21417 | CU_HEADERP first. */ | |
21418 | ||
21419 | static const struct comp_unit_head * | |
21420 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
21421 | struct dwarf2_per_cu_data *per_cu) | |
21422 | { | |
d521ce57 | 21423 | const gdb_byte *info_ptr; |
96408a79 SA |
21424 | |
21425 | if (per_cu->cu) | |
21426 | return &per_cu->cu->header; | |
21427 | ||
8a0459fd | 21428 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
21429 | |
21430 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 21431 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
21432 | |
21433 | return cu_headerp; | |
21434 | } | |
21435 | ||
ae0d2f24 UW |
21436 | /* Return the address size given in the compilation unit header for CU. */ |
21437 | ||
98714339 | 21438 | int |
ae0d2f24 UW |
21439 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
21440 | { | |
96408a79 SA |
21441 | struct comp_unit_head cu_header_local; |
21442 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 21443 | |
96408a79 SA |
21444 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21445 | ||
21446 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
21447 | } |
21448 | ||
9eae7c52 TT |
21449 | /* Return the offset size given in the compilation unit header for CU. */ |
21450 | ||
21451 | int | |
21452 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
21453 | { | |
96408a79 SA |
21454 | struct comp_unit_head cu_header_local; |
21455 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 21456 | |
96408a79 SA |
21457 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21458 | ||
21459 | return cu_headerp->offset_size; | |
21460 | } | |
21461 | ||
21462 | /* See its dwarf2loc.h declaration. */ | |
21463 | ||
21464 | int | |
21465 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
21466 | { | |
21467 | struct comp_unit_head cu_header_local; | |
21468 | const struct comp_unit_head *cu_headerp; | |
21469 | ||
21470 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
21471 | ||
21472 | if (cu_headerp->version == 2) | |
21473 | return cu_headerp->addr_size; | |
21474 | else | |
21475 | return cu_headerp->offset_size; | |
181cebd4 JK |
21476 | } |
21477 | ||
9aa1f1e3 TT |
21478 | /* Return the text offset of the CU. The returned offset comes from |
21479 | this CU's objfile. If this objfile came from a separate debuginfo | |
21480 | file, then the offset may be different from the corresponding | |
21481 | offset in the parent objfile. */ | |
21482 | ||
21483 | CORE_ADDR | |
21484 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
21485 | { | |
bb3fa9d0 | 21486 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
21487 | |
21488 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
21489 | } | |
21490 | ||
348e048f DE |
21491 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
21492 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
21493 | |
21494 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 21495 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 21496 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
21497 | struct objfile *objfile) |
21498 | { | |
21499 | struct dwarf2_per_cu_data *this_cu; | |
21500 | int low, high; | |
36586728 | 21501 | const sect_offset *cu_off; |
ae038cb0 | 21502 | |
ae038cb0 DJ |
21503 | low = 0; |
21504 | high = dwarf2_per_objfile->n_comp_units - 1; | |
21505 | while (high > low) | |
21506 | { | |
36586728 | 21507 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 21508 | int mid = low + (high - low) / 2; |
9a619af0 | 21509 | |
36586728 TT |
21510 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
21511 | cu_off = &mid_cu->offset; | |
21512 | if (mid_cu->is_dwz > offset_in_dwz | |
21513 | || (mid_cu->is_dwz == offset_in_dwz | |
21514 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
21515 | high = mid; |
21516 | else | |
21517 | low = mid + 1; | |
21518 | } | |
21519 | gdb_assert (low == high); | |
36586728 TT |
21520 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
21521 | cu_off = &this_cu->offset; | |
21522 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 21523 | { |
36586728 | 21524 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
21525 | error (_("Dwarf Error: could not find partial DIE containing " |
21526 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 21527 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 21528 | |
b64f50a1 JK |
21529 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
21530 | <= offset.sect_off); | |
ae038cb0 DJ |
21531 | return dwarf2_per_objfile->all_comp_units[low-1]; |
21532 | } | |
21533 | else | |
21534 | { | |
21535 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
21536 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
21537 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
21538 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
21539 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
21540 | return this_cu; |
21541 | } | |
21542 | } | |
21543 | ||
23745b47 | 21544 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 21545 | |
9816fde3 | 21546 | static void |
23745b47 | 21547 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 21548 | { |
9816fde3 | 21549 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
21550 | per_cu->cu = cu; |
21551 | cu->per_cu = per_cu; | |
21552 | cu->objfile = per_cu->objfile; | |
93311388 | 21553 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
21554 | } |
21555 | ||
21556 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
21557 | ||
21558 | static void | |
95554aad TT |
21559 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
21560 | enum language pretend_language) | |
9816fde3 JK |
21561 | { |
21562 | struct attribute *attr; | |
21563 | ||
21564 | /* Set the language we're debugging. */ | |
21565 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
21566 | if (attr) | |
21567 | set_cu_language (DW_UNSND (attr), cu); | |
21568 | else | |
9cded63f | 21569 | { |
95554aad | 21570 | cu->language = pretend_language; |
9cded63f TT |
21571 | cu->language_defn = language_def (cu->language); |
21572 | } | |
dee91e82 DE |
21573 | |
21574 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
21575 | if (attr) | |
21576 | cu->producer = DW_STRING (attr); | |
93311388 DE |
21577 | } |
21578 | ||
ae038cb0 DJ |
21579 | /* Release one cached compilation unit, CU. We unlink it from the tree |
21580 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
21581 | the caller is responsible for that. |
21582 | NOTE: DATA is a void * because this function is also used as a | |
21583 | cleanup routine. */ | |
ae038cb0 DJ |
21584 | |
21585 | static void | |
68dc6402 | 21586 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
21587 | { |
21588 | struct dwarf2_cu *cu = data; | |
21589 | ||
23745b47 DE |
21590 | gdb_assert (cu->per_cu != NULL); |
21591 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
21592 | cu->per_cu = NULL; |
21593 | ||
21594 | obstack_free (&cu->comp_unit_obstack, NULL); | |
21595 | ||
21596 | xfree (cu); | |
21597 | } | |
21598 | ||
72bf9492 | 21599 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 21600 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 21601 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
21602 | |
21603 | static void | |
21604 | free_stack_comp_unit (void *data) | |
21605 | { | |
21606 | struct dwarf2_cu *cu = data; | |
21607 | ||
23745b47 DE |
21608 | gdb_assert (cu->per_cu != NULL); |
21609 | cu->per_cu->cu = NULL; | |
21610 | cu->per_cu = NULL; | |
21611 | ||
72bf9492 DJ |
21612 | obstack_free (&cu->comp_unit_obstack, NULL); |
21613 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
21614 | } |
21615 | ||
21616 | /* Free all cached compilation units. */ | |
21617 | ||
21618 | static void | |
21619 | free_cached_comp_units (void *data) | |
21620 | { | |
21621 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21622 | ||
21623 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21624 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21625 | while (per_cu != NULL) | |
21626 | { | |
21627 | struct dwarf2_per_cu_data *next_cu; | |
21628 | ||
21629 | next_cu = per_cu->cu->read_in_chain; | |
21630 | ||
68dc6402 | 21631 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
21632 | *last_chain = next_cu; |
21633 | ||
21634 | per_cu = next_cu; | |
21635 | } | |
21636 | } | |
21637 | ||
21638 | /* Increase the age counter on each cached compilation unit, and free | |
21639 | any that are too old. */ | |
21640 | ||
21641 | static void | |
21642 | age_cached_comp_units (void) | |
21643 | { | |
21644 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21645 | ||
21646 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
21647 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21648 | while (per_cu != NULL) | |
21649 | { | |
21650 | per_cu->cu->last_used ++; | |
21651 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
21652 | dwarf2_mark (per_cu->cu); | |
21653 | per_cu = per_cu->cu->read_in_chain; | |
21654 | } | |
21655 | ||
21656 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21657 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21658 | while (per_cu != NULL) | |
21659 | { | |
21660 | struct dwarf2_per_cu_data *next_cu; | |
21661 | ||
21662 | next_cu = per_cu->cu->read_in_chain; | |
21663 | ||
21664 | if (!per_cu->cu->mark) | |
21665 | { | |
68dc6402 | 21666 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
21667 | *last_chain = next_cu; |
21668 | } | |
21669 | else | |
21670 | last_chain = &per_cu->cu->read_in_chain; | |
21671 | ||
21672 | per_cu = next_cu; | |
21673 | } | |
21674 | } | |
21675 | ||
21676 | /* Remove a single compilation unit from the cache. */ | |
21677 | ||
21678 | static void | |
dee91e82 | 21679 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
21680 | { |
21681 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21682 | ||
21683 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21684 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21685 | while (per_cu != NULL) | |
21686 | { | |
21687 | struct dwarf2_per_cu_data *next_cu; | |
21688 | ||
21689 | next_cu = per_cu->cu->read_in_chain; | |
21690 | ||
dee91e82 | 21691 | if (per_cu == target_per_cu) |
ae038cb0 | 21692 | { |
68dc6402 | 21693 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 21694 | per_cu->cu = NULL; |
ae038cb0 DJ |
21695 | *last_chain = next_cu; |
21696 | break; | |
21697 | } | |
21698 | else | |
21699 | last_chain = &per_cu->cu->read_in_chain; | |
21700 | ||
21701 | per_cu = next_cu; | |
21702 | } | |
21703 | } | |
21704 | ||
fe3e1990 DJ |
21705 | /* Release all extra memory associated with OBJFILE. */ |
21706 | ||
21707 | void | |
21708 | dwarf2_free_objfile (struct objfile *objfile) | |
21709 | { | |
21710 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
21711 | ||
21712 | if (dwarf2_per_objfile == NULL) | |
21713 | return; | |
21714 | ||
21715 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
21716 | free_cached_comp_units (NULL); | |
21717 | ||
7b9f3c50 DE |
21718 | if (dwarf2_per_objfile->quick_file_names_table) |
21719 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 21720 | |
fe3e1990 DJ |
21721 | /* Everything else should be on the objfile obstack. */ |
21722 | } | |
21723 | ||
dee91e82 DE |
21724 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
21725 | We store these in a hash table separate from the DIEs, and preserve them | |
21726 | when the DIEs are flushed out of cache. | |
21727 | ||
21728 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 21729 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
21730 | or the type may come from a DWO file. Furthermore, while it's more logical |
21731 | to use per_cu->section+offset, with Fission the section with the data is in | |
21732 | the DWO file but we don't know that section at the point we need it. | |
21733 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
21734 | because we can enter the lookup routine, get_die_type_at_offset, from | |
21735 | outside this file, and thus won't necessarily have PER_CU->cu. | |
21736 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 21737 | |
dee91e82 | 21738 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 21739 | { |
dee91e82 | 21740 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 21741 | sect_offset offset; |
1c379e20 DJ |
21742 | struct type *type; |
21743 | }; | |
21744 | ||
dee91e82 | 21745 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
21746 | |
21747 | static hashval_t | |
dee91e82 | 21748 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 21749 | { |
dee91e82 | 21750 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 21751 | |
dee91e82 | 21752 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
21753 | } |
21754 | ||
dee91e82 | 21755 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
21756 | |
21757 | static int | |
dee91e82 | 21758 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 21759 | { |
dee91e82 DE |
21760 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
21761 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 21762 | |
dee91e82 DE |
21763 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
21764 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
21765 | } |
21766 | ||
21767 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
21768 | table if necessary. For convenience, return TYPE. |
21769 | ||
21770 | The DIEs reading must have careful ordering to: | |
21771 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
21772 | reading current DIE. | |
21773 | * Not trying to dereference contents of still incompletely read in types | |
21774 | while reading in other DIEs. | |
21775 | * Enable referencing still incompletely read in types just by a pointer to | |
21776 | the type without accessing its fields. | |
21777 | ||
21778 | Therefore caller should follow these rules: | |
21779 | * Try to fetch any prerequisite types we may need to build this DIE type | |
21780 | before building the type and calling set_die_type. | |
e71ec853 | 21781 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
21782 | possible before fetching more types to complete the current type. |
21783 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 21784 | |
f792889a | 21785 | static struct type * |
1c379e20 DJ |
21786 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
21787 | { | |
dee91e82 | 21788 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 21789 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
21790 | struct attribute *attr; |
21791 | struct dynamic_prop prop; | |
1c379e20 | 21792 | |
b4ba55a1 JB |
21793 | /* For Ada types, make sure that the gnat-specific data is always |
21794 | initialized (if not already set). There are a few types where | |
21795 | we should not be doing so, because the type-specific area is | |
21796 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
21797 | where the type-specific area is used to store the floatformat). | |
21798 | But this is not a problem, because the gnat-specific information | |
21799 | is actually not needed for these types. */ | |
21800 | if (need_gnat_info (cu) | |
21801 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
21802 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
21803 | && !HAVE_GNAT_AUX_INFO (type)) | |
21804 | INIT_GNAT_SPECIFIC (type); | |
21805 | ||
3cdcd0ce JB |
21806 | /* Read DW_AT_data_location and set in type. */ |
21807 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
21808 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
21809 | { | |
21810 | TYPE_DATA_LOCATION (type) | |
21811 | = obstack_alloc (&objfile->objfile_obstack, sizeof (prop)); | |
21812 | *TYPE_DATA_LOCATION (type) = prop; | |
21813 | } | |
21814 | ||
dee91e82 | 21815 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 21816 | { |
dee91e82 DE |
21817 | dwarf2_per_objfile->die_type_hash = |
21818 | htab_create_alloc_ex (127, | |
21819 | per_cu_offset_and_type_hash, | |
21820 | per_cu_offset_and_type_eq, | |
21821 | NULL, | |
21822 | &objfile->objfile_obstack, | |
21823 | hashtab_obstack_allocate, | |
21824 | dummy_obstack_deallocate); | |
f792889a | 21825 | } |
1c379e20 | 21826 | |
dee91e82 | 21827 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
21828 | ofs.offset = die->offset; |
21829 | ofs.type = type; | |
dee91e82 DE |
21830 | slot = (struct dwarf2_per_cu_offset_and_type **) |
21831 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
21832 | if (*slot) |
21833 | complaint (&symfile_complaints, | |
21834 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 21835 | die->offset.sect_off); |
673bfd45 | 21836 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 21837 | **slot = ofs; |
f792889a | 21838 | return type; |
1c379e20 DJ |
21839 | } |
21840 | ||
02142a6c DE |
21841 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
21842 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
21843 | |
21844 | static struct type * | |
b64f50a1 | 21845 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 21846 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 21847 | { |
dee91e82 | 21848 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 21849 | |
dee91e82 | 21850 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 21851 | return NULL; |
1c379e20 | 21852 | |
dee91e82 | 21853 | ofs.per_cu = per_cu; |
673bfd45 | 21854 | ofs.offset = offset; |
dee91e82 | 21855 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
21856 | if (slot) |
21857 | return slot->type; | |
21858 | else | |
21859 | return NULL; | |
21860 | } | |
21861 | ||
02142a6c | 21862 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
21863 | or return NULL if DIE does not have a saved type. */ |
21864 | ||
21865 | static struct type * | |
21866 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
21867 | { | |
21868 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
21869 | } | |
21870 | ||
10b3939b DJ |
21871 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
21872 | ||
21873 | static void | |
21874 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
21875 | struct dwarf2_per_cu_data *ref_per_cu) | |
21876 | { | |
21877 | void **slot; | |
21878 | ||
21879 | if (cu->dependencies == NULL) | |
21880 | cu->dependencies | |
21881 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
21882 | NULL, &cu->comp_unit_obstack, | |
21883 | hashtab_obstack_allocate, | |
21884 | dummy_obstack_deallocate); | |
21885 | ||
21886 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
21887 | if (*slot == NULL) | |
21888 | *slot = ref_per_cu; | |
21889 | } | |
1c379e20 | 21890 | |
f504f079 DE |
21891 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
21892 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
21893 | cache that we must keep because we are keeping CU. */ |
21894 | ||
10b3939b DJ |
21895 | static int |
21896 | dwarf2_mark_helper (void **slot, void *data) | |
21897 | { | |
21898 | struct dwarf2_per_cu_data *per_cu; | |
21899 | ||
21900 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
21901 | |
21902 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
21903 | reading of the chain. As such dependencies remain valid it is not much | |
21904 | useful to track and undo them during QUIT cleanups. */ | |
21905 | if (per_cu->cu == NULL) | |
21906 | return 1; | |
21907 | ||
10b3939b DJ |
21908 | if (per_cu->cu->mark) |
21909 | return 1; | |
21910 | per_cu->cu->mark = 1; | |
21911 | ||
21912 | if (per_cu->cu->dependencies != NULL) | |
21913 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
21914 | ||
21915 | return 1; | |
21916 | } | |
21917 | ||
f504f079 DE |
21918 | /* Set the mark field in CU and in every other compilation unit in the |
21919 | cache that we must keep because we are keeping CU. */ | |
21920 | ||
ae038cb0 DJ |
21921 | static void |
21922 | dwarf2_mark (struct dwarf2_cu *cu) | |
21923 | { | |
21924 | if (cu->mark) | |
21925 | return; | |
21926 | cu->mark = 1; | |
10b3939b DJ |
21927 | if (cu->dependencies != NULL) |
21928 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
21929 | } |
21930 | ||
21931 | static void | |
21932 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
21933 | { | |
21934 | while (per_cu) | |
21935 | { | |
21936 | per_cu->cu->mark = 0; | |
21937 | per_cu = per_cu->cu->read_in_chain; | |
21938 | } | |
72bf9492 DJ |
21939 | } |
21940 | ||
72bf9492 DJ |
21941 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
21942 | is its offset in .debug_info for this objfile. */ | |
21943 | ||
21944 | static hashval_t | |
21945 | partial_die_hash (const void *item) | |
21946 | { | |
21947 | const struct partial_die_info *part_die = item; | |
9a619af0 | 21948 | |
b64f50a1 | 21949 | return part_die->offset.sect_off; |
72bf9492 DJ |
21950 | } |
21951 | ||
21952 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
21953 | are equal if they have the same offset. */ | |
21954 | ||
21955 | static int | |
21956 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
21957 | { | |
21958 | const struct partial_die_info *part_die_lhs = item_lhs; | |
21959 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 21960 | |
b64f50a1 | 21961 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
21962 | } |
21963 | ||
ae038cb0 DJ |
21964 | static struct cmd_list_element *set_dwarf2_cmdlist; |
21965 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
21966 | ||
21967 | static void | |
21968 | set_dwarf2_cmd (char *args, int from_tty) | |
21969 | { | |
635c7e8a TT |
21970 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", all_commands, |
21971 | gdb_stdout); | |
ae038cb0 DJ |
21972 | } |
21973 | ||
21974 | static void | |
21975 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 21976 | { |
ae038cb0 DJ |
21977 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
21978 | } | |
21979 | ||
4bf44c1c | 21980 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
21981 | |
21982 | static void | |
c1bd65d0 | 21983 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
21984 | { |
21985 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 21986 | int ix; |
8b70b953 | 21987 | |
626f2d1c TT |
21988 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
21989 | cleaning up. */ | |
21990 | dwarf2_per_objfile = NULL; | |
21991 | ||
59b0c7c1 JB |
21992 | for (ix = 0; ix < data->n_comp_units; ++ix) |
21993 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 21994 | |
59b0c7c1 | 21995 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 21996 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
21997 | data->all_type_units[ix]->per_cu.imported_symtabs); |
21998 | xfree (data->all_type_units); | |
95554aad | 21999 | |
8b70b953 | 22000 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
22001 | |
22002 | if (data->dwo_files) | |
22003 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
22004 | if (data->dwp_file) |
22005 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
22006 | |
22007 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
22008 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
22009 | } |
22010 | ||
22011 | \f | |
ae2de4f8 | 22012 | /* The "save gdb-index" command. */ |
9291a0cd TT |
22013 | |
22014 | /* The contents of the hash table we create when building the string | |
22015 | table. */ | |
22016 | struct strtab_entry | |
22017 | { | |
22018 | offset_type offset; | |
22019 | const char *str; | |
22020 | }; | |
22021 | ||
559a7a62 JK |
22022 | /* Hash function for a strtab_entry. |
22023 | ||
22024 | Function is used only during write_hash_table so no index format backward | |
22025 | compatibility is needed. */ | |
b89be57b | 22026 | |
9291a0cd TT |
22027 | static hashval_t |
22028 | hash_strtab_entry (const void *e) | |
22029 | { | |
22030 | const struct strtab_entry *entry = e; | |
559a7a62 | 22031 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
22032 | } |
22033 | ||
22034 | /* Equality function for a strtab_entry. */ | |
b89be57b | 22035 | |
9291a0cd TT |
22036 | static int |
22037 | eq_strtab_entry (const void *a, const void *b) | |
22038 | { | |
22039 | const struct strtab_entry *ea = a; | |
22040 | const struct strtab_entry *eb = b; | |
22041 | return !strcmp (ea->str, eb->str); | |
22042 | } | |
22043 | ||
22044 | /* Create a strtab_entry hash table. */ | |
b89be57b | 22045 | |
9291a0cd TT |
22046 | static htab_t |
22047 | create_strtab (void) | |
22048 | { | |
22049 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
22050 | xfree, xcalloc, xfree); | |
22051 | } | |
22052 | ||
22053 | /* Add a string to the constant pool. Return the string's offset in | |
22054 | host order. */ | |
b89be57b | 22055 | |
9291a0cd TT |
22056 | static offset_type |
22057 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
22058 | { | |
22059 | void **slot; | |
22060 | struct strtab_entry entry; | |
22061 | struct strtab_entry *result; | |
22062 | ||
22063 | entry.str = str; | |
22064 | slot = htab_find_slot (table, &entry, INSERT); | |
22065 | if (*slot) | |
22066 | result = *slot; | |
22067 | else | |
22068 | { | |
22069 | result = XNEW (struct strtab_entry); | |
22070 | result->offset = obstack_object_size (cpool); | |
22071 | result->str = str; | |
22072 | obstack_grow_str0 (cpool, str); | |
22073 | *slot = result; | |
22074 | } | |
22075 | return result->offset; | |
22076 | } | |
22077 | ||
22078 | /* An entry in the symbol table. */ | |
22079 | struct symtab_index_entry | |
22080 | { | |
22081 | /* The name of the symbol. */ | |
22082 | const char *name; | |
22083 | /* The offset of the name in the constant pool. */ | |
22084 | offset_type index_offset; | |
22085 | /* A sorted vector of the indices of all the CUs that hold an object | |
22086 | of this name. */ | |
22087 | VEC (offset_type) *cu_indices; | |
22088 | }; | |
22089 | ||
22090 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
22091 | struct mapped_symtab | |
22092 | { | |
22093 | offset_type n_elements; | |
22094 | offset_type size; | |
22095 | struct symtab_index_entry **data; | |
22096 | }; | |
22097 | ||
22098 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 22099 | |
9291a0cd TT |
22100 | static hashval_t |
22101 | hash_symtab_entry (const void *e) | |
22102 | { | |
22103 | const struct symtab_index_entry *entry = e; | |
22104 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
22105 | sizeof (offset_type) * VEC_length (offset_type, | |
22106 | entry->cu_indices), | |
22107 | 0); | |
22108 | } | |
22109 | ||
22110 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 22111 | |
9291a0cd TT |
22112 | static int |
22113 | eq_symtab_entry (const void *a, const void *b) | |
22114 | { | |
22115 | const struct symtab_index_entry *ea = a; | |
22116 | const struct symtab_index_entry *eb = b; | |
22117 | int len = VEC_length (offset_type, ea->cu_indices); | |
22118 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
22119 | return 0; | |
22120 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
22121 | VEC_address (offset_type, eb->cu_indices), | |
22122 | sizeof (offset_type) * len); | |
22123 | } | |
22124 | ||
22125 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 22126 | |
9291a0cd TT |
22127 | static void |
22128 | delete_symtab_entry (void *p) | |
22129 | { | |
22130 | struct symtab_index_entry *entry = p; | |
22131 | VEC_free (offset_type, entry->cu_indices); | |
22132 | xfree (entry); | |
22133 | } | |
22134 | ||
22135 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 22136 | |
9291a0cd | 22137 | static htab_t |
3876f04e | 22138 | create_symbol_hash_table (void) |
9291a0cd TT |
22139 | { |
22140 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
22141 | delete_symtab_entry, xcalloc, xfree); | |
22142 | } | |
22143 | ||
22144 | /* Create a new mapped symtab object. */ | |
b89be57b | 22145 | |
9291a0cd TT |
22146 | static struct mapped_symtab * |
22147 | create_mapped_symtab (void) | |
22148 | { | |
22149 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
22150 | symtab->n_elements = 0; | |
22151 | symtab->size = 1024; | |
22152 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22153 | return symtab; | |
22154 | } | |
22155 | ||
22156 | /* Destroy a mapped_symtab. */ | |
b89be57b | 22157 | |
9291a0cd TT |
22158 | static void |
22159 | cleanup_mapped_symtab (void *p) | |
22160 | { | |
22161 | struct mapped_symtab *symtab = p; | |
22162 | /* The contents of the array are freed when the other hash table is | |
22163 | destroyed. */ | |
22164 | xfree (symtab->data); | |
22165 | xfree (symtab); | |
22166 | } | |
22167 | ||
22168 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
22169 | the slot. |
22170 | ||
22171 | Function is used only during write_hash_table so no index format backward | |
22172 | compatibility is needed. */ | |
b89be57b | 22173 | |
9291a0cd TT |
22174 | static struct symtab_index_entry ** |
22175 | find_slot (struct mapped_symtab *symtab, const char *name) | |
22176 | { | |
559a7a62 | 22177 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
22178 | |
22179 | index = hash & (symtab->size - 1); | |
22180 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
22181 | ||
22182 | for (;;) | |
22183 | { | |
22184 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
22185 | return &symtab->data[index]; | |
22186 | index = (index + step) & (symtab->size - 1); | |
22187 | } | |
22188 | } | |
22189 | ||
22190 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 22191 | |
9291a0cd TT |
22192 | static void |
22193 | hash_expand (struct mapped_symtab *symtab) | |
22194 | { | |
22195 | offset_type old_size = symtab->size; | |
22196 | offset_type i; | |
22197 | struct symtab_index_entry **old_entries = symtab->data; | |
22198 | ||
22199 | symtab->size *= 2; | |
22200 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
22201 | ||
22202 | for (i = 0; i < old_size; ++i) | |
22203 | { | |
22204 | if (old_entries[i]) | |
22205 | { | |
22206 | struct symtab_index_entry **slot = find_slot (symtab, | |
22207 | old_entries[i]->name); | |
22208 | *slot = old_entries[i]; | |
22209 | } | |
22210 | } | |
22211 | ||
22212 | xfree (old_entries); | |
22213 | } | |
22214 | ||
156942c7 DE |
22215 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
22216 | CU_INDEX is the index of the CU in which the symbol appears. | |
22217 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 22218 | |
9291a0cd TT |
22219 | static void |
22220 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 22221 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
22222 | offset_type cu_index) |
22223 | { | |
22224 | struct symtab_index_entry **slot; | |
156942c7 | 22225 | offset_type cu_index_and_attrs; |
9291a0cd TT |
22226 | |
22227 | ++symtab->n_elements; | |
22228 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
22229 | hash_expand (symtab); | |
22230 | ||
22231 | slot = find_slot (symtab, name); | |
22232 | if (!*slot) | |
22233 | { | |
22234 | *slot = XNEW (struct symtab_index_entry); | |
22235 | (*slot)->name = name; | |
156942c7 | 22236 | /* index_offset is set later. */ |
9291a0cd TT |
22237 | (*slot)->cu_indices = NULL; |
22238 | } | |
156942c7 DE |
22239 | |
22240 | cu_index_and_attrs = 0; | |
22241 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
22242 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
22243 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
22244 | ||
22245 | /* We don't want to record an index value twice as we want to avoid the | |
22246 | duplication. | |
22247 | We process all global symbols and then all static symbols | |
22248 | (which would allow us to avoid the duplication by only having to check | |
22249 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
22250 | To keep things simple we don't worry about the duplication here and | |
22251 | sort and uniqufy the list after we've processed all symbols. */ | |
22252 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
22253 | } | |
22254 | ||
22255 | /* qsort helper routine for uniquify_cu_indices. */ | |
22256 | ||
22257 | static int | |
22258 | offset_type_compare (const void *ap, const void *bp) | |
22259 | { | |
22260 | offset_type a = *(offset_type *) ap; | |
22261 | offset_type b = *(offset_type *) bp; | |
22262 | ||
22263 | return (a > b) - (b > a); | |
22264 | } | |
22265 | ||
22266 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
22267 | ||
22268 | static void | |
22269 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
22270 | { | |
22271 | int i; | |
22272 | ||
22273 | for (i = 0; i < symtab->size; ++i) | |
22274 | { | |
22275 | struct symtab_index_entry *entry = symtab->data[i]; | |
22276 | ||
22277 | if (entry | |
22278 | && entry->cu_indices != NULL) | |
22279 | { | |
22280 | unsigned int next_to_insert, next_to_check; | |
22281 | offset_type last_value; | |
22282 | ||
22283 | qsort (VEC_address (offset_type, entry->cu_indices), | |
22284 | VEC_length (offset_type, entry->cu_indices), | |
22285 | sizeof (offset_type), offset_type_compare); | |
22286 | ||
22287 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
22288 | next_to_insert = 1; | |
22289 | for (next_to_check = 1; | |
22290 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
22291 | ++next_to_check) | |
22292 | { | |
22293 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
22294 | != last_value) | |
22295 | { | |
22296 | last_value = VEC_index (offset_type, entry->cu_indices, | |
22297 | next_to_check); | |
22298 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
22299 | last_value); | |
22300 | ++next_to_insert; | |
22301 | } | |
22302 | } | |
22303 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
22304 | } | |
22305 | } | |
9291a0cd TT |
22306 | } |
22307 | ||
22308 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 22309 | |
9291a0cd | 22310 | static offset_type |
3876f04e | 22311 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
22312 | struct symtab_index_entry *entry) |
22313 | { | |
22314 | void **slot; | |
22315 | ||
3876f04e | 22316 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
22317 | if (!*slot) |
22318 | { | |
22319 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
22320 | offset_type val = MAYBE_SWAP (len); | |
22321 | offset_type iter; | |
22322 | int i; | |
22323 | ||
22324 | *slot = entry; | |
22325 | entry->index_offset = obstack_object_size (cpool); | |
22326 | ||
22327 | obstack_grow (cpool, &val, sizeof (val)); | |
22328 | for (i = 0; | |
22329 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
22330 | ++i) | |
22331 | { | |
22332 | val = MAYBE_SWAP (iter); | |
22333 | obstack_grow (cpool, &val, sizeof (val)); | |
22334 | } | |
22335 | } | |
22336 | else | |
22337 | { | |
22338 | struct symtab_index_entry *old_entry = *slot; | |
22339 | entry->index_offset = old_entry->index_offset; | |
22340 | entry = old_entry; | |
22341 | } | |
22342 | return entry->index_offset; | |
22343 | } | |
22344 | ||
22345 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
22346 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 22347 | |
9291a0cd TT |
22348 | static void |
22349 | write_hash_table (struct mapped_symtab *symtab, | |
22350 | struct obstack *output, struct obstack *cpool) | |
22351 | { | |
22352 | offset_type i; | |
3876f04e | 22353 | htab_t symbol_hash_table; |
9291a0cd TT |
22354 | htab_t str_table; |
22355 | ||
3876f04e | 22356 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 22357 | str_table = create_strtab (); |
3876f04e | 22358 | |
9291a0cd TT |
22359 | /* We add all the index vectors to the constant pool first, to |
22360 | ensure alignment is ok. */ | |
22361 | for (i = 0; i < symtab->size; ++i) | |
22362 | { | |
22363 | if (symtab->data[i]) | |
3876f04e | 22364 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
22365 | } |
22366 | ||
22367 | /* Now write out the hash table. */ | |
22368 | for (i = 0; i < symtab->size; ++i) | |
22369 | { | |
22370 | offset_type str_off, vec_off; | |
22371 | ||
22372 | if (symtab->data[i]) | |
22373 | { | |
22374 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
22375 | vec_off = symtab->data[i]->index_offset; | |
22376 | } | |
22377 | else | |
22378 | { | |
22379 | /* While 0 is a valid constant pool index, it is not valid | |
22380 | to have 0 for both offsets. */ | |
22381 | str_off = 0; | |
22382 | vec_off = 0; | |
22383 | } | |
22384 | ||
22385 | str_off = MAYBE_SWAP (str_off); | |
22386 | vec_off = MAYBE_SWAP (vec_off); | |
22387 | ||
22388 | obstack_grow (output, &str_off, sizeof (str_off)); | |
22389 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
22390 | } | |
22391 | ||
22392 | htab_delete (str_table); | |
3876f04e | 22393 | htab_delete (symbol_hash_table); |
9291a0cd TT |
22394 | } |
22395 | ||
0a5429f6 DE |
22396 | /* Struct to map psymtab to CU index in the index file. */ |
22397 | struct psymtab_cu_index_map | |
22398 | { | |
22399 | struct partial_symtab *psymtab; | |
22400 | unsigned int cu_index; | |
22401 | }; | |
22402 | ||
22403 | static hashval_t | |
22404 | hash_psymtab_cu_index (const void *item) | |
22405 | { | |
22406 | const struct psymtab_cu_index_map *map = item; | |
22407 | ||
22408 | return htab_hash_pointer (map->psymtab); | |
22409 | } | |
22410 | ||
22411 | static int | |
22412 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
22413 | { | |
22414 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
22415 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
22416 | ||
22417 | return lhs->psymtab == rhs->psymtab; | |
22418 | } | |
22419 | ||
22420 | /* Helper struct for building the address table. */ | |
22421 | struct addrmap_index_data | |
22422 | { | |
22423 | struct objfile *objfile; | |
22424 | struct obstack *addr_obstack; | |
22425 | htab_t cu_index_htab; | |
22426 | ||
22427 | /* Non-zero if the previous_* fields are valid. | |
22428 | We can't write an entry until we see the next entry (since it is only then | |
22429 | that we know the end of the entry). */ | |
22430 | int previous_valid; | |
22431 | /* Index of the CU in the table of all CUs in the index file. */ | |
22432 | unsigned int previous_cu_index; | |
0963b4bd | 22433 | /* Start address of the CU. */ |
0a5429f6 DE |
22434 | CORE_ADDR previous_cu_start; |
22435 | }; | |
22436 | ||
22437 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 22438 | |
9291a0cd | 22439 | static void |
0a5429f6 DE |
22440 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
22441 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 22442 | { |
0a5429f6 | 22443 | offset_type cu_index_to_write; |
948f8e3d | 22444 | gdb_byte addr[8]; |
9291a0cd TT |
22445 | CORE_ADDR baseaddr; |
22446 | ||
22447 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22448 | ||
0a5429f6 DE |
22449 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
22450 | obstack_grow (obstack, addr, 8); | |
22451 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
22452 | obstack_grow (obstack, addr, 8); | |
22453 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
22454 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
22455 | } | |
22456 | ||
22457 | /* Worker function for traversing an addrmap to build the address table. */ | |
22458 | ||
22459 | static int | |
22460 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
22461 | { | |
22462 | struct addrmap_index_data *data = datap; | |
22463 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
22464 | |
22465 | if (data->previous_valid) | |
22466 | add_address_entry (data->objfile, data->addr_obstack, | |
22467 | data->previous_cu_start, start_addr, | |
22468 | data->previous_cu_index); | |
22469 | ||
22470 | data->previous_cu_start = start_addr; | |
22471 | if (pst != NULL) | |
22472 | { | |
22473 | struct psymtab_cu_index_map find_map, *map; | |
22474 | find_map.psymtab = pst; | |
22475 | map = htab_find (data->cu_index_htab, &find_map); | |
22476 | gdb_assert (map != NULL); | |
22477 | data->previous_cu_index = map->cu_index; | |
22478 | data->previous_valid = 1; | |
22479 | } | |
22480 | else | |
22481 | data->previous_valid = 0; | |
22482 | ||
22483 | return 0; | |
22484 | } | |
22485 | ||
22486 | /* Write OBJFILE's address map to OBSTACK. | |
22487 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
22488 | in the index file. */ | |
22489 | ||
22490 | static void | |
22491 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
22492 | htab_t cu_index_htab) | |
22493 | { | |
22494 | struct addrmap_index_data addrmap_index_data; | |
22495 | ||
22496 | /* When writing the address table, we have to cope with the fact that | |
22497 | the addrmap iterator only provides the start of a region; we have to | |
22498 | wait until the next invocation to get the start of the next region. */ | |
22499 | ||
22500 | addrmap_index_data.objfile = objfile; | |
22501 | addrmap_index_data.addr_obstack = obstack; | |
22502 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
22503 | addrmap_index_data.previous_valid = 0; | |
22504 | ||
22505 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
22506 | &addrmap_index_data); | |
22507 | ||
22508 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
22509 | is valid, but we should still handle it. | |
22510 | The end address is recorded as the start of the next region, but that | |
22511 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
22512 | anyway. */ | |
22513 | if (addrmap_index_data.previous_valid) | |
22514 | add_address_entry (objfile, obstack, | |
22515 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
22516 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
22517 | } |
22518 | ||
156942c7 DE |
22519 | /* Return the symbol kind of PSYM. */ |
22520 | ||
22521 | static gdb_index_symbol_kind | |
22522 | symbol_kind (struct partial_symbol *psym) | |
22523 | { | |
22524 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
22525 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
22526 | ||
22527 | switch (domain) | |
22528 | { | |
22529 | case VAR_DOMAIN: | |
22530 | switch (aclass) | |
22531 | { | |
22532 | case LOC_BLOCK: | |
22533 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
22534 | case LOC_TYPEDEF: | |
22535 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
22536 | case LOC_COMPUTED: | |
22537 | case LOC_CONST_BYTES: | |
22538 | case LOC_OPTIMIZED_OUT: | |
22539 | case LOC_STATIC: | |
22540 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
22541 | case LOC_CONST: | |
22542 | /* Note: It's currently impossible to recognize psyms as enum values | |
22543 | short of reading the type info. For now punt. */ | |
22544 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
22545 | default: | |
22546 | /* There are other LOC_FOO values that one might want to classify | |
22547 | as variables, but dwarf2read.c doesn't currently use them. */ | |
22548 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
22549 | } | |
22550 | case STRUCT_DOMAIN: | |
22551 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
22552 | default: | |
22553 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
22554 | } | |
22555 | } | |
22556 | ||
9291a0cd | 22557 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 22558 | |
9291a0cd TT |
22559 | static void |
22560 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 22561 | htab_t psyms_seen, |
9291a0cd TT |
22562 | struct partial_symbol **psymp, |
22563 | int count, | |
987d643c TT |
22564 | offset_type cu_index, |
22565 | int is_static) | |
9291a0cd TT |
22566 | { |
22567 | for (; count-- > 0; ++psymp) | |
22568 | { | |
156942c7 DE |
22569 | struct partial_symbol *psym = *psymp; |
22570 | void **slot; | |
987d643c | 22571 | |
156942c7 | 22572 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 22573 | error (_("Ada is not currently supported by the index")); |
987d643c | 22574 | |
987d643c | 22575 | /* Only add a given psymbol once. */ |
156942c7 | 22576 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
22577 | if (!*slot) |
22578 | { | |
156942c7 DE |
22579 | gdb_index_symbol_kind kind = symbol_kind (psym); |
22580 | ||
22581 | *slot = psym; | |
22582 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
22583 | is_static, kind, cu_index); | |
987d643c | 22584 | } |
9291a0cd TT |
22585 | } |
22586 | } | |
22587 | ||
22588 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
22589 | exception if there is an error. */ | |
b89be57b | 22590 | |
9291a0cd TT |
22591 | static void |
22592 | write_obstack (FILE *file, struct obstack *obstack) | |
22593 | { | |
22594 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
22595 | file) | |
22596 | != obstack_object_size (obstack)) | |
22597 | error (_("couldn't data write to file")); | |
22598 | } | |
22599 | ||
22600 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 22601 | |
9291a0cd TT |
22602 | static void |
22603 | unlink_if_set (void *p) | |
22604 | { | |
22605 | char **filename = p; | |
22606 | if (*filename) | |
22607 | unlink (*filename); | |
22608 | } | |
22609 | ||
1fd400ff TT |
22610 | /* A helper struct used when iterating over debug_types. */ |
22611 | struct signatured_type_index_data | |
22612 | { | |
22613 | struct objfile *objfile; | |
22614 | struct mapped_symtab *symtab; | |
22615 | struct obstack *types_list; | |
987d643c | 22616 | htab_t psyms_seen; |
1fd400ff TT |
22617 | int cu_index; |
22618 | }; | |
22619 | ||
22620 | /* A helper function that writes a single signatured_type to an | |
22621 | obstack. */ | |
b89be57b | 22622 | |
1fd400ff TT |
22623 | static int |
22624 | write_one_signatured_type (void **slot, void *d) | |
22625 | { | |
22626 | struct signatured_type_index_data *info = d; | |
22627 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
0186c6a7 | 22628 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
22629 | gdb_byte val[8]; |
22630 | ||
22631 | write_psymbols (info->symtab, | |
987d643c | 22632 | info->psyms_seen, |
3e43a32a MS |
22633 | info->objfile->global_psymbols.list |
22634 | + psymtab->globals_offset, | |
987d643c TT |
22635 | psymtab->n_global_syms, info->cu_index, |
22636 | 0); | |
1fd400ff | 22637 | write_psymbols (info->symtab, |
987d643c | 22638 | info->psyms_seen, |
3e43a32a MS |
22639 | info->objfile->static_psymbols.list |
22640 | + psymtab->statics_offset, | |
987d643c TT |
22641 | psymtab->n_static_syms, info->cu_index, |
22642 | 1); | |
1fd400ff | 22643 | |
b64f50a1 JK |
22644 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22645 | entry->per_cu.offset.sect_off); | |
1fd400ff | 22646 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
22647 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22648 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
22649 | obstack_grow (info->types_list, val, 8); |
22650 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
22651 | obstack_grow (info->types_list, val, 8); | |
22652 | ||
22653 | ++info->cu_index; | |
22654 | ||
22655 | return 1; | |
22656 | } | |
22657 | ||
95554aad TT |
22658 | /* Recurse into all "included" dependencies and write their symbols as |
22659 | if they appeared in this psymtab. */ | |
22660 | ||
22661 | static void | |
22662 | recursively_write_psymbols (struct objfile *objfile, | |
22663 | struct partial_symtab *psymtab, | |
22664 | struct mapped_symtab *symtab, | |
22665 | htab_t psyms_seen, | |
22666 | offset_type cu_index) | |
22667 | { | |
22668 | int i; | |
22669 | ||
22670 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
22671 | if (psymtab->dependencies[i]->user != NULL) | |
22672 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
22673 | symtab, psyms_seen, cu_index); | |
22674 | ||
22675 | write_psymbols (symtab, | |
22676 | psyms_seen, | |
22677 | objfile->global_psymbols.list + psymtab->globals_offset, | |
22678 | psymtab->n_global_syms, cu_index, | |
22679 | 0); | |
22680 | write_psymbols (symtab, | |
22681 | psyms_seen, | |
22682 | objfile->static_psymbols.list + psymtab->statics_offset, | |
22683 | psymtab->n_static_syms, cu_index, | |
22684 | 1); | |
22685 | } | |
22686 | ||
9291a0cd | 22687 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 22688 | |
9291a0cd TT |
22689 | static void |
22690 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
22691 | { | |
22692 | struct cleanup *cleanup; | |
22693 | char *filename, *cleanup_filename; | |
1fd400ff TT |
22694 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
22695 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
22696 | int i; |
22697 | FILE *out_file; | |
22698 | struct mapped_symtab *symtab; | |
22699 | offset_type val, size_of_contents, total_len; | |
22700 | struct stat st; | |
987d643c | 22701 | htab_t psyms_seen; |
0a5429f6 DE |
22702 | htab_t cu_index_htab; |
22703 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 22704 | |
9291a0cd TT |
22705 | if (dwarf2_per_objfile->using_index) |
22706 | error (_("Cannot use an index to create the index")); | |
22707 | ||
8b70b953 TT |
22708 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
22709 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
22710 | ||
260b681b DE |
22711 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
22712 | return; | |
22713 | ||
4262abfb JK |
22714 | if (stat (objfile_name (objfile), &st) < 0) |
22715 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 22716 | |
4262abfb | 22717 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
22718 | INDEX_SUFFIX, (char *) NULL); |
22719 | cleanup = make_cleanup (xfree, filename); | |
22720 | ||
614c279d | 22721 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
22722 | if (!out_file) |
22723 | error (_("Can't open `%s' for writing"), filename); | |
22724 | ||
22725 | cleanup_filename = filename; | |
22726 | make_cleanup (unlink_if_set, &cleanup_filename); | |
22727 | ||
22728 | symtab = create_mapped_symtab (); | |
22729 | make_cleanup (cleanup_mapped_symtab, symtab); | |
22730 | ||
22731 | obstack_init (&addr_obstack); | |
22732 | make_cleanup_obstack_free (&addr_obstack); | |
22733 | ||
22734 | obstack_init (&cu_list); | |
22735 | make_cleanup_obstack_free (&cu_list); | |
22736 | ||
1fd400ff TT |
22737 | obstack_init (&types_cu_list); |
22738 | make_cleanup_obstack_free (&types_cu_list); | |
22739 | ||
987d643c TT |
22740 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
22741 | NULL, xcalloc, xfree); | |
96408a79 | 22742 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 22743 | |
0a5429f6 DE |
22744 | /* While we're scanning CU's create a table that maps a psymtab pointer |
22745 | (which is what addrmap records) to its index (which is what is recorded | |
22746 | in the index file). This will later be needed to write the address | |
22747 | table. */ | |
22748 | cu_index_htab = htab_create_alloc (100, | |
22749 | hash_psymtab_cu_index, | |
22750 | eq_psymtab_cu_index, | |
22751 | NULL, xcalloc, xfree); | |
96408a79 | 22752 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
22753 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
22754 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
22755 | * dwarf2_per_objfile->n_comp_units); | |
22756 | make_cleanup (xfree, psymtab_cu_index_map); | |
22757 | ||
22758 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
22759 | work here. Also, the debug_types entries do not appear in |
22760 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
22761 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
22762 | { | |
3e43a32a MS |
22763 | struct dwarf2_per_cu_data *per_cu |
22764 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 22765 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 22766 | gdb_byte val[8]; |
0a5429f6 DE |
22767 | struct psymtab_cu_index_map *map; |
22768 | void **slot; | |
9291a0cd | 22769 | |
92fac807 JK |
22770 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
22771 | It may be referenced from a local scope but in such case it does not | |
22772 | need to be present in .gdb_index. */ | |
22773 | if (psymtab == NULL) | |
22774 | continue; | |
22775 | ||
95554aad TT |
22776 | if (psymtab->user == NULL) |
22777 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 22778 | |
0a5429f6 DE |
22779 | map = &psymtab_cu_index_map[i]; |
22780 | map->psymtab = psymtab; | |
22781 | map->cu_index = i; | |
22782 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
22783 | gdb_assert (slot != NULL); | |
22784 | gdb_assert (*slot == NULL); | |
22785 | *slot = map; | |
9291a0cd | 22786 | |
b64f50a1 JK |
22787 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22788 | per_cu->offset.sect_off); | |
9291a0cd | 22789 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 22790 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
22791 | obstack_grow (&cu_list, val, 8); |
22792 | } | |
22793 | ||
0a5429f6 DE |
22794 | /* Dump the address map. */ |
22795 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
22796 | ||
1fd400ff TT |
22797 | /* Write out the .debug_type entries, if any. */ |
22798 | if (dwarf2_per_objfile->signatured_types) | |
22799 | { | |
22800 | struct signatured_type_index_data sig_data; | |
22801 | ||
22802 | sig_data.objfile = objfile; | |
22803 | sig_data.symtab = symtab; | |
22804 | sig_data.types_list = &types_cu_list; | |
987d643c | 22805 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
22806 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
22807 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
22808 | write_one_signatured_type, &sig_data); | |
22809 | } | |
22810 | ||
156942c7 DE |
22811 | /* Now that we've processed all symbols we can shrink their cu_indices |
22812 | lists. */ | |
22813 | uniquify_cu_indices (symtab); | |
22814 | ||
9291a0cd TT |
22815 | obstack_init (&constant_pool); |
22816 | make_cleanup_obstack_free (&constant_pool); | |
22817 | obstack_init (&symtab_obstack); | |
22818 | make_cleanup_obstack_free (&symtab_obstack); | |
22819 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
22820 | ||
22821 | obstack_init (&contents); | |
22822 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 22823 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
22824 | total_len = size_of_contents; |
22825 | ||
22826 | /* The version number. */ | |
796a7ff8 | 22827 | val = MAYBE_SWAP (8); |
9291a0cd TT |
22828 | obstack_grow (&contents, &val, sizeof (val)); |
22829 | ||
22830 | /* The offset of the CU list from the start of the file. */ | |
22831 | val = MAYBE_SWAP (total_len); | |
22832 | obstack_grow (&contents, &val, sizeof (val)); | |
22833 | total_len += obstack_object_size (&cu_list); | |
22834 | ||
1fd400ff TT |
22835 | /* The offset of the types CU list from the start of the file. */ |
22836 | val = MAYBE_SWAP (total_len); | |
22837 | obstack_grow (&contents, &val, sizeof (val)); | |
22838 | total_len += obstack_object_size (&types_cu_list); | |
22839 | ||
9291a0cd TT |
22840 | /* The offset of the address table from the start of the file. */ |
22841 | val = MAYBE_SWAP (total_len); | |
22842 | obstack_grow (&contents, &val, sizeof (val)); | |
22843 | total_len += obstack_object_size (&addr_obstack); | |
22844 | ||
22845 | /* The offset of the symbol table from the start of the file. */ | |
22846 | val = MAYBE_SWAP (total_len); | |
22847 | obstack_grow (&contents, &val, sizeof (val)); | |
22848 | total_len += obstack_object_size (&symtab_obstack); | |
22849 | ||
22850 | /* The offset of the constant pool from the start of the file. */ | |
22851 | val = MAYBE_SWAP (total_len); | |
22852 | obstack_grow (&contents, &val, sizeof (val)); | |
22853 | total_len += obstack_object_size (&constant_pool); | |
22854 | ||
22855 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
22856 | ||
22857 | write_obstack (out_file, &contents); | |
22858 | write_obstack (out_file, &cu_list); | |
1fd400ff | 22859 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
22860 | write_obstack (out_file, &addr_obstack); |
22861 | write_obstack (out_file, &symtab_obstack); | |
22862 | write_obstack (out_file, &constant_pool); | |
22863 | ||
22864 | fclose (out_file); | |
22865 | ||
22866 | /* We want to keep the file, so we set cleanup_filename to NULL | |
22867 | here. See unlink_if_set. */ | |
22868 | cleanup_filename = NULL; | |
22869 | ||
22870 | do_cleanups (cleanup); | |
22871 | } | |
22872 | ||
90476074 TT |
22873 | /* Implementation of the `save gdb-index' command. |
22874 | ||
22875 | Note that the file format used by this command is documented in the | |
22876 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 22877 | |
9291a0cd TT |
22878 | static void |
22879 | save_gdb_index_command (char *arg, int from_tty) | |
22880 | { | |
22881 | struct objfile *objfile; | |
22882 | ||
22883 | if (!arg || !*arg) | |
96d19272 | 22884 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
22885 | |
22886 | ALL_OBJFILES (objfile) | |
22887 | { | |
22888 | struct stat st; | |
22889 | ||
22890 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 22891 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
22892 | continue; |
22893 | ||
22894 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
22895 | if (dwarf2_per_objfile) | |
22896 | { | |
22897 | volatile struct gdb_exception except; | |
22898 | ||
22899 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
22900 | { | |
22901 | write_psymtabs_to_index (objfile, arg); | |
22902 | } | |
22903 | if (except.reason < 0) | |
22904 | exception_fprintf (gdb_stderr, except, | |
22905 | _("Error while writing index for `%s': "), | |
4262abfb | 22906 | objfile_name (objfile)); |
9291a0cd TT |
22907 | } |
22908 | } | |
dce234bc PP |
22909 | } |
22910 | ||
9291a0cd TT |
22911 | \f |
22912 | ||
9eae7c52 TT |
22913 | int dwarf2_always_disassemble; |
22914 | ||
22915 | static void | |
22916 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
22917 | struct cmd_list_element *c, const char *value) | |
22918 | { | |
3e43a32a MS |
22919 | fprintf_filtered (file, |
22920 | _("Whether to always disassemble " | |
22921 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
22922 | value); |
22923 | } | |
22924 | ||
900e11f9 JK |
22925 | static void |
22926 | show_check_physname (struct ui_file *file, int from_tty, | |
22927 | struct cmd_list_element *c, const char *value) | |
22928 | { | |
22929 | fprintf_filtered (file, | |
22930 | _("Whether to check \"physname\" is %s.\n"), | |
22931 | value); | |
22932 | } | |
22933 | ||
6502dd73 DJ |
22934 | void _initialize_dwarf2_read (void); |
22935 | ||
22936 | void | |
22937 | _initialize_dwarf2_read (void) | |
22938 | { | |
96d19272 JK |
22939 | struct cmd_list_element *c; |
22940 | ||
dce234bc | 22941 | dwarf2_objfile_data_key |
c1bd65d0 | 22942 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 22943 | |
1bedd215 AC |
22944 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
22945 | Set DWARF 2 specific variables.\n\ | |
22946 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
22947 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
22948 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
22949 | ||
1bedd215 AC |
22950 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
22951 | Show DWARF 2 specific variables\n\ | |
22952 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
22953 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
22954 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
22955 | ||
22956 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
22957 | &dwarf2_max_cache_age, _("\ |
22958 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
22959 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
22960 | A higher limit means that cached compilation units will be stored\n\ | |
22961 | in memory longer, and more total memory will be used. Zero disables\n\ | |
22962 | caching, which can slow down startup."), | |
2c5b56ce | 22963 | NULL, |
920d2a44 | 22964 | show_dwarf2_max_cache_age, |
2c5b56ce | 22965 | &set_dwarf2_cmdlist, |
ae038cb0 | 22966 | &show_dwarf2_cmdlist); |
d97bc12b | 22967 | |
9eae7c52 TT |
22968 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
22969 | &dwarf2_always_disassemble, _("\ | |
22970 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
22971 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
22972 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
22973 | syntax. When disabled, expressions will be printed in a more\n\ | |
22974 | conversational style, when possible."), | |
22975 | NULL, | |
22976 | show_dwarf2_always_disassemble, | |
22977 | &set_dwarf2_cmdlist, | |
22978 | &show_dwarf2_cmdlist); | |
22979 | ||
73be47f5 | 22980 | add_setshow_zuinteger_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
45cfd468 DE |
22981 | Set debugging of the dwarf2 reader."), _("\ |
22982 | Show debugging of the dwarf2 reader."), _("\ | |
73be47f5 DE |
22983 | When enabled (non-zero), debugging messages are printed during dwarf2\n\ |
22984 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
22985 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
22986 | NULL, |
22987 | NULL, | |
22988 | &setdebuglist, &showdebuglist); | |
22989 | ||
ccce17b0 | 22990 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
22991 | Set debugging of the dwarf2 DIE reader."), _("\ |
22992 | Show debugging of the dwarf2 DIE reader."), _("\ | |
22993 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
22994 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
22995 | NULL, |
22996 | NULL, | |
22997 | &setdebuglist, &showdebuglist); | |
9291a0cd | 22998 | |
900e11f9 JK |
22999 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
23000 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
23001 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
23002 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
23003 | the demangler."), | |
23004 | NULL, show_check_physname, | |
23005 | &setdebuglist, &showdebuglist); | |
23006 | ||
e615022a DE |
23007 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
23008 | no_class, &use_deprecated_index_sections, _("\ | |
23009 | Set whether to use deprecated gdb_index sections."), _("\ | |
23010 | Show whether to use deprecated gdb_index sections."), _("\ | |
23011 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
23012 | Normally they are ignored either because of a missing feature or\n\ | |
23013 | performance issue.\n\ | |
23014 | Warning: This option must be enabled before gdb reads the file."), | |
23015 | NULL, | |
23016 | NULL, | |
23017 | &setlist, &showlist); | |
23018 | ||
96d19272 | 23019 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 23020 | _("\ |
fc1a9d6e | 23021 | Save a gdb-index file.\n\ |
11570e71 | 23022 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
23023 | &save_cmdlist); |
23024 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
23025 | |
23026 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23027 | &dwarf2_locexpr_funcs); | |
23028 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23029 | &dwarf2_loclist_funcs); | |
23030 | ||
23031 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23032 | &dwarf2_block_frame_base_locexpr_funcs); | |
23033 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23034 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 23035 | } |