Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
ecd75fc8 | 3 | Copyright (C) 1994-2014 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 KS |
55 | #include "typeprint.h" |
56 | #include "jv-lang.h" | |
ccefe4c4 | 57 | #include "psympriv.h" |
9291a0cd | 58 | #include "exceptions.h" |
53ce3c39 | 59 | #include <sys/stat.h> |
96d19272 | 60 | #include "completer.h" |
34eaf542 | 61 | #include "vec.h" |
98bfdba5 | 62 | #include "c-lang.h" |
a766d390 | 63 | #include "go-lang.h" |
98bfdba5 | 64 | #include "valprint.h" |
3019eac3 | 65 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 66 | #include "gdb/gdb-index.h" |
60d5a603 | 67 | #include <ctype.h> |
cbb099e8 | 68 | #include "gdb_bfd.h" |
4357ac6c | 69 | #include "f-lang.h" |
05cba821 | 70 | #include "source.h" |
614c279d | 71 | #include "filestuff.h" |
dc294be5 | 72 | #include "build-id.h" |
4c2df51b | 73 | |
c906108c | 74 | #include <fcntl.h> |
0e9f083f | 75 | #include <string.h> |
4bdf3d34 | 76 | #include "gdb_assert.h" |
c906108c | 77 | #include <sys/types.h> |
d8151005 | 78 | |
34eaf542 TT |
79 | typedef struct symbol *symbolp; |
80 | DEF_VEC_P (symbolp); | |
81 | ||
73be47f5 DE |
82 | /* When == 1, print basic high level tracing messages. |
83 | When > 1, be more verbose. | |
45cfd468 | 84 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ |
73be47f5 | 85 | static unsigned int dwarf2_read_debug = 0; |
45cfd468 | 86 | |
d97bc12b | 87 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 88 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 89 | |
900e11f9 JK |
90 | /* When non-zero, cross-check physname against demangler. */ |
91 | static int check_physname = 0; | |
92 | ||
481860b3 | 93 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 94 | static int use_deprecated_index_sections = 0; |
481860b3 | 95 | |
6502dd73 DJ |
96 | static const struct objfile_data *dwarf2_objfile_data_key; |
97 | ||
f1e6e072 TT |
98 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
99 | ||
100 | static int dwarf2_locexpr_index; | |
101 | static int dwarf2_loclist_index; | |
102 | static int dwarf2_locexpr_block_index; | |
103 | static int dwarf2_loclist_block_index; | |
104 | ||
73869dc2 DE |
105 | /* A descriptor for dwarf sections. |
106 | ||
107 | S.ASECTION, SIZE are typically initialized when the objfile is first | |
108 | scanned. BUFFER, READIN are filled in later when the section is read. | |
109 | If the section contained compressed data then SIZE is updated to record | |
110 | the uncompressed size of the section. | |
111 | ||
112 | DWP file format V2 introduces a wrinkle that is easiest to handle by | |
113 | creating the concept of virtual sections contained within a real section. | |
114 | In DWP V2 the sections of the input DWO files are concatenated together | |
115 | into one section, but section offsets are kept relative to the original | |
116 | input section. | |
117 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to | |
118 | the real section this "virtual" section is contained in, and BUFFER,SIZE | |
119 | describe the virtual section. */ | |
120 | ||
dce234bc PP |
121 | struct dwarf2_section_info |
122 | { | |
73869dc2 DE |
123 | union |
124 | { | |
e5aa3347 | 125 | /* If this is a real section, the bfd section. */ |
73869dc2 DE |
126 | asection *asection; |
127 | /* If this is a virtual section, pointer to the containing ("real") | |
e5aa3347 | 128 | section. */ |
73869dc2 DE |
129 | struct dwarf2_section_info *containing_section; |
130 | } s; | |
19ac8c2e | 131 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 132 | const gdb_byte *buffer; |
73869dc2 | 133 | /* The size of the section, real or virtual. */ |
dce234bc | 134 | bfd_size_type size; |
73869dc2 DE |
135 | /* If this is a virtual section, the offset in the real section. |
136 | Only valid if is_virtual. */ | |
137 | bfd_size_type virtual_offset; | |
be391dca | 138 | /* True if we have tried to read this section. */ |
73869dc2 DE |
139 | char readin; |
140 | /* True if this is a virtual section, False otherwise. | |
141 | This specifies which of s.asection and s.containing_section to use. */ | |
142 | char is_virtual; | |
dce234bc PP |
143 | }; |
144 | ||
8b70b953 TT |
145 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
146 | DEF_VEC_O (dwarf2_section_info_def); | |
147 | ||
9291a0cd TT |
148 | /* All offsets in the index are of this type. It must be |
149 | architecture-independent. */ | |
150 | typedef uint32_t offset_type; | |
151 | ||
152 | DEF_VEC_I (offset_type); | |
153 | ||
156942c7 DE |
154 | /* Ensure only legit values are used. */ |
155 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
156 | do { \ | |
157 | gdb_assert ((unsigned int) (value) <= 1); \ | |
158 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
159 | } while (0) | |
160 | ||
161 | /* Ensure only legit values are used. */ | |
162 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
163 | do { \ | |
164 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
165 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
166 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
167 | } while (0) | |
168 | ||
169 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
170 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
171 | do { \ | |
172 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
173 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
174 | } while (0) | |
175 | ||
9291a0cd TT |
176 | /* A description of the mapped index. The file format is described in |
177 | a comment by the code that writes the index. */ | |
178 | struct mapped_index | |
179 | { | |
559a7a62 JK |
180 | /* Index data format version. */ |
181 | int version; | |
182 | ||
9291a0cd TT |
183 | /* The total length of the buffer. */ |
184 | off_t total_size; | |
b11b1f88 | 185 | |
9291a0cd TT |
186 | /* A pointer to the address table data. */ |
187 | const gdb_byte *address_table; | |
b11b1f88 | 188 | |
9291a0cd TT |
189 | /* Size of the address table data in bytes. */ |
190 | offset_type address_table_size; | |
b11b1f88 | 191 | |
3876f04e DE |
192 | /* The symbol table, implemented as a hash table. */ |
193 | const offset_type *symbol_table; | |
b11b1f88 | 194 | |
9291a0cd | 195 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 196 | offset_type symbol_table_slots; |
b11b1f88 | 197 | |
9291a0cd TT |
198 | /* A pointer to the constant pool. */ |
199 | const char *constant_pool; | |
200 | }; | |
201 | ||
95554aad TT |
202 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
203 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
204 | ||
9cdd5dbd DE |
205 | /* Collection of data recorded per objfile. |
206 | This hangs off of dwarf2_objfile_data_key. */ | |
207 | ||
6502dd73 DJ |
208 | struct dwarf2_per_objfile |
209 | { | |
dce234bc PP |
210 | struct dwarf2_section_info info; |
211 | struct dwarf2_section_info abbrev; | |
212 | struct dwarf2_section_info line; | |
dce234bc PP |
213 | struct dwarf2_section_info loc; |
214 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 215 | struct dwarf2_section_info macro; |
dce234bc PP |
216 | struct dwarf2_section_info str; |
217 | struct dwarf2_section_info ranges; | |
3019eac3 | 218 | struct dwarf2_section_info addr; |
dce234bc PP |
219 | struct dwarf2_section_info frame; |
220 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 221 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 222 | |
8b70b953 TT |
223 | VEC (dwarf2_section_info_def) *types; |
224 | ||
be391dca TT |
225 | /* Back link. */ |
226 | struct objfile *objfile; | |
227 | ||
d467dd73 | 228 | /* Table of all the compilation units. This is used to locate |
10b3939b | 229 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
230 | struct dwarf2_per_cu_data **all_comp_units; |
231 | ||
232 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
233 | int n_comp_units; | |
234 | ||
1fd400ff | 235 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 236 | int n_type_units; |
1fd400ff | 237 | |
a2ce51a0 DE |
238 | /* The .debug_types-related CUs (TUs). |
239 | This is stored in malloc space because we may realloc it. */ | |
b4dd5633 | 240 | struct signatured_type **all_type_units; |
1fd400ff | 241 | |
f4dc4d17 DE |
242 | /* Table of struct type_unit_group objects. |
243 | The hash key is the DW_AT_stmt_list value. */ | |
244 | htab_t type_unit_groups; | |
72dca2f5 | 245 | |
348e048f DE |
246 | /* A table mapping .debug_types signatures to its signatured_type entry. |
247 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
248 | htab_t signatured_types; | |
249 | ||
f4dc4d17 DE |
250 | /* Type unit statistics, to see how well the scaling improvements |
251 | are doing. */ | |
252 | struct tu_stats | |
253 | { | |
254 | int nr_uniq_abbrev_tables; | |
255 | int nr_symtabs; | |
256 | int nr_symtab_sharers; | |
257 | int nr_stmt_less_type_units; | |
258 | } tu_stats; | |
259 | ||
260 | /* A chain of compilation units that are currently read in, so that | |
261 | they can be freed later. */ | |
262 | struct dwarf2_per_cu_data *read_in_chain; | |
263 | ||
3019eac3 DE |
264 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
265 | This is NULL if the table hasn't been allocated yet. */ | |
266 | htab_t dwo_files; | |
267 | ||
80626a55 DE |
268 | /* Non-zero if we've check for whether there is a DWP file. */ |
269 | int dwp_checked; | |
270 | ||
271 | /* The DWP file if there is one, or NULL. */ | |
272 | struct dwp_file *dwp_file; | |
273 | ||
36586728 TT |
274 | /* The shared '.dwz' file, if one exists. This is used when the |
275 | original data was compressed using 'dwz -m'. */ | |
276 | struct dwz_file *dwz_file; | |
277 | ||
72dca2f5 FR |
278 | /* A flag indicating wether this objfile has a section loaded at a |
279 | VMA of 0. */ | |
280 | int has_section_at_zero; | |
9291a0cd | 281 | |
ae2de4f8 DE |
282 | /* True if we are using the mapped index, |
283 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
284 | unsigned char using_index; |
285 | ||
ae2de4f8 | 286 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 287 | struct mapped_index *index_table; |
98bfdba5 | 288 | |
7b9f3c50 | 289 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
290 | TUs typically share line table entries with a CU, so we maintain a |
291 | separate table of all line table entries to support the sharing. | |
292 | Note that while there can be way more TUs than CUs, we've already | |
293 | sorted all the TUs into "type unit groups", grouped by their | |
294 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
295 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
296 | htab_t quick_file_names_table; |
297 | ||
98bfdba5 PA |
298 | /* Set during partial symbol reading, to prevent queueing of full |
299 | symbols. */ | |
300 | int reading_partial_symbols; | |
673bfd45 | 301 | |
dee91e82 | 302 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 303 | This is NULL if not allocated yet. |
02142a6c | 304 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 305 | htab_t die_type_hash; |
95554aad TT |
306 | |
307 | /* The CUs we recently read. */ | |
308 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
309 | }; |
310 | ||
311 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 312 | |
251d32d9 | 313 | /* Default names of the debugging sections. */ |
c906108c | 314 | |
233a11ab CS |
315 | /* Note that if the debugging section has been compressed, it might |
316 | have a name like .zdebug_info. */ | |
317 | ||
9cdd5dbd DE |
318 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
319 | { | |
251d32d9 TG |
320 | { ".debug_info", ".zdebug_info" }, |
321 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
322 | { ".debug_line", ".zdebug_line" }, | |
323 | { ".debug_loc", ".zdebug_loc" }, | |
324 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 325 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
326 | { ".debug_str", ".zdebug_str" }, |
327 | { ".debug_ranges", ".zdebug_ranges" }, | |
328 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 329 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
330 | { ".debug_frame", ".zdebug_frame" }, |
331 | { ".eh_frame", NULL }, | |
24d3216f TT |
332 | { ".gdb_index", ".zgdb_index" }, |
333 | 23 | |
251d32d9 | 334 | }; |
c906108c | 335 | |
80626a55 | 336 | /* List of DWO/DWP sections. */ |
3019eac3 | 337 | |
80626a55 | 338 | static const struct dwop_section_names |
3019eac3 DE |
339 | { |
340 | struct dwarf2_section_names abbrev_dwo; | |
341 | struct dwarf2_section_names info_dwo; | |
342 | struct dwarf2_section_names line_dwo; | |
343 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
344 | struct dwarf2_section_names macinfo_dwo; |
345 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
346 | struct dwarf2_section_names str_dwo; |
347 | struct dwarf2_section_names str_offsets_dwo; | |
348 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
349 | struct dwarf2_section_names cu_index; |
350 | struct dwarf2_section_names tu_index; | |
3019eac3 | 351 | } |
80626a55 | 352 | dwop_section_names = |
3019eac3 DE |
353 | { |
354 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
355 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
356 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
357 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
358 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
359 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
360 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
361 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
362 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
363 | { ".debug_cu_index", ".zdebug_cu_index" }, |
364 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
365 | }; |
366 | ||
c906108c SS |
367 | /* local data types */ |
368 | ||
107d2387 AC |
369 | /* The data in a compilation unit header, after target2host |
370 | translation, looks like this. */ | |
c906108c | 371 | struct comp_unit_head |
a738430d | 372 | { |
c764a876 | 373 | unsigned int length; |
a738430d | 374 | short version; |
a738430d MK |
375 | unsigned char addr_size; |
376 | unsigned char signed_addr_p; | |
b64f50a1 | 377 | sect_offset abbrev_offset; |
57349743 | 378 | |
a738430d MK |
379 | /* Size of file offsets; either 4 or 8. */ |
380 | unsigned int offset_size; | |
57349743 | 381 | |
a738430d MK |
382 | /* Size of the length field; either 4 or 12. */ |
383 | unsigned int initial_length_size; | |
57349743 | 384 | |
a738430d MK |
385 | /* Offset to the first byte of this compilation unit header in the |
386 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 387 | sect_offset offset; |
57349743 | 388 | |
d00adf39 DE |
389 | /* Offset to first die in this cu from the start of the cu. |
390 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 391 | cu_offset first_die_offset; |
a738430d | 392 | }; |
c906108c | 393 | |
3da10d80 KS |
394 | /* Type used for delaying computation of method physnames. |
395 | See comments for compute_delayed_physnames. */ | |
396 | struct delayed_method_info | |
397 | { | |
398 | /* The type to which the method is attached, i.e., its parent class. */ | |
399 | struct type *type; | |
400 | ||
401 | /* The index of the method in the type's function fieldlists. */ | |
402 | int fnfield_index; | |
403 | ||
404 | /* The index of the method in the fieldlist. */ | |
405 | int index; | |
406 | ||
407 | /* The name of the DIE. */ | |
408 | const char *name; | |
409 | ||
410 | /* The DIE associated with this method. */ | |
411 | struct die_info *die; | |
412 | }; | |
413 | ||
414 | typedef struct delayed_method_info delayed_method_info; | |
415 | DEF_VEC_O (delayed_method_info); | |
416 | ||
e7c27a73 DJ |
417 | /* Internal state when decoding a particular compilation unit. */ |
418 | struct dwarf2_cu | |
419 | { | |
420 | /* The objfile containing this compilation unit. */ | |
421 | struct objfile *objfile; | |
422 | ||
d00adf39 | 423 | /* The header of the compilation unit. */ |
e7c27a73 | 424 | struct comp_unit_head header; |
e142c38c | 425 | |
d00adf39 DE |
426 | /* Base address of this compilation unit. */ |
427 | CORE_ADDR base_address; | |
428 | ||
429 | /* Non-zero if base_address has been set. */ | |
430 | int base_known; | |
431 | ||
e142c38c DJ |
432 | /* The language we are debugging. */ |
433 | enum language language; | |
434 | const struct language_defn *language_defn; | |
435 | ||
b0f35d58 DL |
436 | const char *producer; |
437 | ||
e142c38c DJ |
438 | /* The generic symbol table building routines have separate lists for |
439 | file scope symbols and all all other scopes (local scopes). So | |
440 | we need to select the right one to pass to add_symbol_to_list(). | |
441 | We do it by keeping a pointer to the correct list in list_in_scope. | |
442 | ||
443 | FIXME: The original dwarf code just treated the file scope as the | |
444 | first local scope, and all other local scopes as nested local | |
445 | scopes, and worked fine. Check to see if we really need to | |
446 | distinguish these in buildsym.c. */ | |
447 | struct pending **list_in_scope; | |
448 | ||
433df2d4 DE |
449 | /* The abbrev table for this CU. |
450 | Normally this points to the abbrev table in the objfile. | |
451 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
452 | struct abbrev_table *abbrev_table; | |
72bf9492 | 453 | |
b64f50a1 JK |
454 | /* Hash table holding all the loaded partial DIEs |
455 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
456 | htab_t partial_dies; |
457 | ||
458 | /* Storage for things with the same lifetime as this read-in compilation | |
459 | unit, including partial DIEs. */ | |
460 | struct obstack comp_unit_obstack; | |
461 | ||
ae038cb0 DJ |
462 | /* When multiple dwarf2_cu structures are living in memory, this field |
463 | chains them all together, so that they can be released efficiently. | |
464 | We will probably also want a generation counter so that most-recently-used | |
465 | compilation units are cached... */ | |
466 | struct dwarf2_per_cu_data *read_in_chain; | |
467 | ||
69d751e3 | 468 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
469 | struct dwarf2_per_cu_data *per_cu; |
470 | ||
471 | /* How many compilation units ago was this CU last referenced? */ | |
472 | int last_used; | |
473 | ||
b64f50a1 JK |
474 | /* A hash table of DIE cu_offset for following references with |
475 | die_info->offset.sect_off as hash. */ | |
51545339 | 476 | htab_t die_hash; |
10b3939b DJ |
477 | |
478 | /* Full DIEs if read in. */ | |
479 | struct die_info *dies; | |
480 | ||
481 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
482 | units referenced by this one. Only set during full symbol processing; | |
483 | partial symbol tables do not have dependencies. */ | |
484 | htab_t dependencies; | |
485 | ||
cb1df416 DJ |
486 | /* Header data from the line table, during full symbol processing. */ |
487 | struct line_header *line_header; | |
488 | ||
3da10d80 KS |
489 | /* A list of methods which need to have physnames computed |
490 | after all type information has been read. */ | |
491 | VEC (delayed_method_info) *method_list; | |
492 | ||
96408a79 SA |
493 | /* To be copied to symtab->call_site_htab. */ |
494 | htab_t call_site_htab; | |
495 | ||
034e5797 DE |
496 | /* Non-NULL if this CU came from a DWO file. |
497 | There is an invariant here that is important to remember: | |
498 | Except for attributes copied from the top level DIE in the "main" | |
499 | (or "stub") file in preparation for reading the DWO file | |
500 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
501 | Either there isn't a DWO file (in which case this is NULL and the point | |
502 | is moot), or there is and either we're not going to read it (in which | |
503 | case this is NULL) or there is and we are reading it (in which case this | |
504 | is non-NULL). */ | |
3019eac3 DE |
505 | struct dwo_unit *dwo_unit; |
506 | ||
507 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
508 | (zero is a valid value though). | |
1dbab08b | 509 | Note this value comes from the Fission stub CU/TU's DIE. */ |
3019eac3 DE |
510 | ULONGEST addr_base; |
511 | ||
2e3cf129 DE |
512 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
513 | (zero is a valid value though). | |
1dbab08b | 514 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 515 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
516 | be used without needing to know whether DWO files are in use or not. |
517 | N.B. This does not apply to DW_AT_ranges appearing in | |
518 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
519 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
520 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
521 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
522 | ULONGEST ranges_base; |
523 | ||
ae038cb0 DJ |
524 | /* Mark used when releasing cached dies. */ |
525 | unsigned int mark : 1; | |
526 | ||
8be455d7 JK |
527 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
528 | This test is imperfect as there may exist optimized debug code not using | |
529 | any location list and still facing inlining issues if handled as | |
530 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 531 | unsigned int has_loclist : 1; |
ba919b58 | 532 | |
1b80a9fa JK |
533 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
534 | if all the producer_is_* fields are valid. This information is cached | |
535 | because profiling CU expansion showed excessive time spent in | |
536 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
537 | unsigned int checked_producer : 1; |
538 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 539 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 540 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
541 | |
542 | /* When set, the file that we're processing is known to have | |
543 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
544 | this information, but later versions do. */ | |
545 | ||
546 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
547 | }; |
548 | ||
10b3939b DJ |
549 | /* Persistent data held for a compilation unit, even when not |
550 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 551 | read_symtab_private field of the psymtab. */ |
10b3939b | 552 | |
ae038cb0 DJ |
553 | struct dwarf2_per_cu_data |
554 | { | |
36586728 | 555 | /* The start offset and length of this compilation unit. |
45452591 | 556 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
557 | initial_length_size. |
558 | If the DIE refers to a DWO file, this is always of the original die, | |
559 | not the DWO file. */ | |
b64f50a1 | 560 | sect_offset offset; |
36586728 | 561 | unsigned int length; |
ae038cb0 DJ |
562 | |
563 | /* Flag indicating this compilation unit will be read in before | |
564 | any of the current compilation units are processed. */ | |
c764a876 | 565 | unsigned int queued : 1; |
ae038cb0 | 566 | |
0d99eb77 DE |
567 | /* This flag will be set when reading partial DIEs if we need to load |
568 | absolutely all DIEs for this compilation unit, instead of just the ones | |
569 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
570 | hash table and don't find it. */ |
571 | unsigned int load_all_dies : 1; | |
572 | ||
0186c6a7 DE |
573 | /* Non-zero if this CU is from .debug_types. |
574 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
575 | this is non-zero. */ | |
3019eac3 DE |
576 | unsigned int is_debug_types : 1; |
577 | ||
36586728 TT |
578 | /* Non-zero if this CU is from the .dwz file. */ |
579 | unsigned int is_dwz : 1; | |
580 | ||
a2ce51a0 DE |
581 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
582 | This flag is only valid if is_debug_types is true. | |
583 | We can't read a CU directly from a DWO file: There are required | |
584 | attributes in the stub. */ | |
585 | unsigned int reading_dwo_directly : 1; | |
586 | ||
7ee85ab1 DE |
587 | /* Non-zero if the TU has been read. |
588 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
589 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
590 | fetching them from random other DWOs (due to comdat folding). | |
591 | If the TU has already been read, the optimization is unnecessary | |
592 | (and unwise - we don't want to change where gdb thinks the TU lives | |
593 | "midflight"). | |
594 | This flag is only valid if is_debug_types is true. */ | |
595 | unsigned int tu_read : 1; | |
596 | ||
3019eac3 DE |
597 | /* The section this CU/TU lives in. |
598 | If the DIE refers to a DWO file, this is always the original die, | |
599 | not the DWO file. */ | |
8a0459fd | 600 | struct dwarf2_section_info *section; |
348e048f | 601 | |
17ea53c3 JK |
602 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
603 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 604 | struct dwarf2_cu *cu; |
1c379e20 | 605 | |
9cdd5dbd DE |
606 | /* The corresponding objfile. |
607 | Normally we can get the objfile from dwarf2_per_objfile. | |
608 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
609 | struct objfile *objfile; |
610 | ||
611 | /* When using partial symbol tables, the 'psymtab' field is active. | |
612 | Otherwise the 'quick' field is active. */ | |
613 | union | |
614 | { | |
615 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 616 | or NULL for unread partial units. */ |
9291a0cd TT |
617 | struct partial_symtab *psymtab; |
618 | ||
619 | /* Data needed by the "quick" functions. */ | |
620 | struct dwarf2_per_cu_quick_data *quick; | |
621 | } v; | |
95554aad | 622 | |
796a7ff8 DE |
623 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
624 | while reading psymtabs, used to compute the psymtab dependencies, | |
625 | and then cleared. Then it is filled in again while reading full | |
626 | symbols, and only deleted when the objfile is destroyed. | |
627 | ||
628 | This is also used to work around a difference between the way gold | |
629 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
630 | is a gold bug. For symbols coming from TUs, gold records in the index | |
631 | the CU that includes the TU instead of the TU itself. This breaks | |
632 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
633 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
634 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
635 | we need to look in TU Z to find X. Fortunately, this is akin to | |
636 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
637 | .gdb_index version <=7 this also records the TUs that the CU referred | |
638 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
639 | indices so we only pay a price for gold generated indices. |
640 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 641 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
642 | }; |
643 | ||
348e048f DE |
644 | /* Entry in the signatured_types hash table. */ |
645 | ||
646 | struct signatured_type | |
647 | { | |
42e7ad6c | 648 | /* The "per_cu" object of this type. |
ac9ec31b | 649 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
650 | N.B.: This is the first member so that it's easy to convert pointers |
651 | between them. */ | |
652 | struct dwarf2_per_cu_data per_cu; | |
653 | ||
3019eac3 | 654 | /* The type's signature. */ |
348e048f DE |
655 | ULONGEST signature; |
656 | ||
3019eac3 | 657 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
658 | If this TU is a DWO stub and the definition lives in a DWO file |
659 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
660 | cu_offset type_offset_in_tu; |
661 | ||
662 | /* Offset in the section of the type's DIE. | |
663 | If the definition lives in a DWO file, this is the offset in the | |
664 | .debug_types.dwo section. | |
665 | The value is zero until the actual value is known. | |
666 | Zero is otherwise not a valid section offset. */ | |
667 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
668 | |
669 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
670 | can share them. This points to the containing symtab. */ | |
671 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
672 | |
673 | /* The type. | |
674 | The first time we encounter this type we fully read it in and install it | |
675 | in the symbol tables. Subsequent times we only need the type. */ | |
676 | struct type *type; | |
a2ce51a0 DE |
677 | |
678 | /* Containing DWO unit. | |
679 | This field is valid iff per_cu.reading_dwo_directly. */ | |
680 | struct dwo_unit *dwo_unit; | |
348e048f DE |
681 | }; |
682 | ||
0186c6a7 DE |
683 | typedef struct signatured_type *sig_type_ptr; |
684 | DEF_VEC_P (sig_type_ptr); | |
685 | ||
094b34ac DE |
686 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
687 | This includes type_unit_group and quick_file_names. */ | |
688 | ||
689 | struct stmt_list_hash | |
690 | { | |
691 | /* The DWO unit this table is from or NULL if there is none. */ | |
692 | struct dwo_unit *dwo_unit; | |
693 | ||
694 | /* Offset in .debug_line or .debug_line.dwo. */ | |
695 | sect_offset line_offset; | |
696 | }; | |
697 | ||
f4dc4d17 DE |
698 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
699 | an object of this type. */ | |
700 | ||
701 | struct type_unit_group | |
702 | { | |
0186c6a7 | 703 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
704 | To simplify things we create an artificial CU that "includes" all the |
705 | type units using this stmt_list so that the rest of the code still has | |
706 | a "per_cu" handle on the symtab. | |
707 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 708 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
709 | struct dwarf2_per_cu_data per_cu; |
710 | ||
0186c6a7 DE |
711 | /* The TUs that share this DW_AT_stmt_list entry. |
712 | This is added to while parsing type units to build partial symtabs, | |
713 | and is deleted afterwards and not used again. */ | |
714 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 DE |
715 | |
716 | /* The primary symtab. | |
094b34ac DE |
717 | Type units in a group needn't all be defined in the same source file, |
718 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
719 | struct symtab *primary_symtab; |
720 | ||
094b34ac DE |
721 | /* The data used to construct the hash key. */ |
722 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
723 | |
724 | /* The number of symtabs from the line header. | |
725 | The value here must match line_header.num_file_names. */ | |
726 | unsigned int num_symtabs; | |
727 | ||
728 | /* The symbol tables for this TU (obtained from the files listed in | |
729 | DW_AT_stmt_list). | |
730 | WARNING: The order of entries here must match the order of entries | |
731 | in the line header. After the first TU using this type_unit_group, the | |
732 | line header for the subsequent TUs is recreated from this. This is done | |
733 | because we need to use the same symtabs for each TU using the same | |
734 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
735 | there's no guarantee the line header doesn't have duplicate entries. */ | |
736 | struct symtab **symtabs; | |
737 | }; | |
738 | ||
73869dc2 | 739 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
740 | |
741 | struct dwo_sections | |
742 | { | |
743 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
744 | struct dwarf2_section_info line; |
745 | struct dwarf2_section_info loc; | |
09262596 DE |
746 | struct dwarf2_section_info macinfo; |
747 | struct dwarf2_section_info macro; | |
3019eac3 DE |
748 | struct dwarf2_section_info str; |
749 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
750 | /* In the case of a virtual DWO file, these two are unused. */ |
751 | struct dwarf2_section_info info; | |
3019eac3 DE |
752 | VEC (dwarf2_section_info_def) *types; |
753 | }; | |
754 | ||
c88ee1f0 | 755 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
756 | |
757 | struct dwo_unit | |
758 | { | |
759 | /* Backlink to the containing struct dwo_file. */ | |
760 | struct dwo_file *dwo_file; | |
761 | ||
762 | /* The "id" that distinguishes this CU/TU. | |
763 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
764 | Since signatures came first, we stick with it for consistency. */ | |
765 | ULONGEST signature; | |
766 | ||
767 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 768 | struct dwarf2_section_info *section; |
3019eac3 | 769 | |
19ac8c2e | 770 | /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */ |
3019eac3 DE |
771 | sect_offset offset; |
772 | unsigned int length; | |
773 | ||
774 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
775 | cu_offset type_offset_in_tu; | |
776 | }; | |
777 | ||
73869dc2 DE |
778 | /* include/dwarf2.h defines the DWP section codes. |
779 | It defines a max value but it doesn't define a min value, which we | |
780 | use for error checking, so provide one. */ | |
781 | ||
782 | enum dwp_v2_section_ids | |
783 | { | |
784 | DW_SECT_MIN = 1 | |
785 | }; | |
786 | ||
80626a55 | 787 | /* Data for one DWO file. |
57d63ce2 DE |
788 | |
789 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
790 | appears in a DWP file). DWP files don't really have DWO files per se - | |
791 | comdat folding of types "loses" the DWO file they came from, and from | |
792 | a high level view DWP files appear to contain a mass of random types. | |
793 | However, to maintain consistency with the non-DWP case we pretend DWP | |
794 | files contain virtual DWO files, and we assign each TU with one virtual | |
795 | DWO file (generally based on the line and abbrev section offsets - | |
796 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
797 | |
798 | struct dwo_file | |
799 | { | |
0ac5b59e | 800 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
801 | For virtual DWO files the name is constructed from the section offsets |
802 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
803 | from related CU+TUs. */ | |
0ac5b59e DE |
804 | const char *dwo_name; |
805 | ||
806 | /* The DW_AT_comp_dir attribute. */ | |
807 | const char *comp_dir; | |
3019eac3 | 808 | |
80626a55 DE |
809 | /* The bfd, when the file is open. Otherwise this is NULL. |
810 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
811 | bfd *dbfd; | |
3019eac3 | 812 | |
73869dc2 DE |
813 | /* The sections that make up this DWO file. |
814 | Remember that for virtual DWO files in DWP V2, these are virtual | |
815 | sections (for lack of a better name). */ | |
3019eac3 DE |
816 | struct dwo_sections sections; |
817 | ||
19c3d4c9 DE |
818 | /* The CU in the file. |
819 | We only support one because having more than one requires hacking the | |
820 | dwo_name of each to match, which is highly unlikely to happen. | |
821 | Doing this means all TUs can share comp_dir: We also assume that | |
822 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
823 | struct dwo_unit *cu; | |
3019eac3 DE |
824 | |
825 | /* Table of TUs in the file. | |
826 | Each element is a struct dwo_unit. */ | |
827 | htab_t tus; | |
828 | }; | |
829 | ||
80626a55 DE |
830 | /* These sections are what may appear in a DWP file. */ |
831 | ||
832 | struct dwp_sections | |
833 | { | |
73869dc2 | 834 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
835 | struct dwarf2_section_info str; |
836 | struct dwarf2_section_info cu_index; | |
837 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
838 | |
839 | /* These are only used by DWP version 2 files. | |
840 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
841 | sections are referenced by section number, and are not recorded here. | |
842 | In DWP version 2 there is at most one copy of all these sections, each | |
843 | section being (effectively) comprised of the concatenation of all of the | |
844 | individual sections that exist in the version 1 format. | |
845 | To keep the code simple we treat each of these concatenated pieces as a | |
846 | section itself (a virtual section?). */ | |
847 | struct dwarf2_section_info abbrev; | |
848 | struct dwarf2_section_info info; | |
849 | struct dwarf2_section_info line; | |
850 | struct dwarf2_section_info loc; | |
851 | struct dwarf2_section_info macinfo; | |
852 | struct dwarf2_section_info macro; | |
853 | struct dwarf2_section_info str_offsets; | |
854 | struct dwarf2_section_info types; | |
80626a55 DE |
855 | }; |
856 | ||
73869dc2 DE |
857 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
858 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 859 | |
73869dc2 | 860 | struct virtual_v1_dwo_sections |
80626a55 DE |
861 | { |
862 | struct dwarf2_section_info abbrev; | |
863 | struct dwarf2_section_info line; | |
864 | struct dwarf2_section_info loc; | |
865 | struct dwarf2_section_info macinfo; | |
866 | struct dwarf2_section_info macro; | |
867 | struct dwarf2_section_info str_offsets; | |
868 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 869 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
870 | struct dwarf2_section_info info_or_types; |
871 | }; | |
872 | ||
73869dc2 DE |
873 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
874 | In version 2, the sections of the DWO files are concatenated together | |
875 | and stored in one section of that name. Thus each ELF section contains | |
876 | several "virtual" sections. */ | |
877 | ||
878 | struct virtual_v2_dwo_sections | |
879 | { | |
880 | bfd_size_type abbrev_offset; | |
881 | bfd_size_type abbrev_size; | |
882 | ||
883 | bfd_size_type line_offset; | |
884 | bfd_size_type line_size; | |
885 | ||
886 | bfd_size_type loc_offset; | |
887 | bfd_size_type loc_size; | |
888 | ||
889 | bfd_size_type macinfo_offset; | |
890 | bfd_size_type macinfo_size; | |
891 | ||
892 | bfd_size_type macro_offset; | |
893 | bfd_size_type macro_size; | |
894 | ||
895 | bfd_size_type str_offsets_offset; | |
896 | bfd_size_type str_offsets_size; | |
897 | ||
898 | /* Each DWP hash table entry records one CU or one TU. | |
899 | That is recorded here, and copied to dwo_unit.section. */ | |
900 | bfd_size_type info_or_types_offset; | |
901 | bfd_size_type info_or_types_size; | |
902 | }; | |
903 | ||
80626a55 DE |
904 | /* Contents of DWP hash tables. */ |
905 | ||
906 | struct dwp_hash_table | |
907 | { | |
73869dc2 | 908 | uint32_t version, nr_columns; |
80626a55 | 909 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
910 | const gdb_byte *hash_table, *unit_table; |
911 | union | |
912 | { | |
913 | struct | |
914 | { | |
915 | const gdb_byte *indices; | |
916 | } v1; | |
917 | struct | |
918 | { | |
919 | /* This is indexed by column number and gives the id of the section | |
920 | in that column. */ | |
921 | #define MAX_NR_V2_DWO_SECTIONS \ | |
922 | (1 /* .debug_info or .debug_types */ \ | |
923 | + 1 /* .debug_abbrev */ \ | |
924 | + 1 /* .debug_line */ \ | |
925 | + 1 /* .debug_loc */ \ | |
926 | + 1 /* .debug_str_offsets */ \ | |
927 | + 1 /* .debug_macro or .debug_macinfo */) | |
928 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
929 | const gdb_byte *offsets; | |
930 | const gdb_byte *sizes; | |
931 | } v2; | |
932 | } section_pool; | |
80626a55 DE |
933 | }; |
934 | ||
935 | /* Data for one DWP file. */ | |
936 | ||
937 | struct dwp_file | |
938 | { | |
939 | /* Name of the file. */ | |
940 | const char *name; | |
941 | ||
73869dc2 DE |
942 | /* File format version. */ |
943 | int version; | |
944 | ||
93417882 | 945 | /* The bfd. */ |
80626a55 DE |
946 | bfd *dbfd; |
947 | ||
948 | /* Section info for this file. */ | |
949 | struct dwp_sections sections; | |
950 | ||
57d63ce2 | 951 | /* Table of CUs in the file. */ |
80626a55 DE |
952 | const struct dwp_hash_table *cus; |
953 | ||
954 | /* Table of TUs in the file. */ | |
955 | const struct dwp_hash_table *tus; | |
956 | ||
19ac8c2e DE |
957 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
958 | htab_t loaded_cus; | |
959 | htab_t loaded_tus; | |
80626a55 | 960 | |
73869dc2 DE |
961 | /* Table to map ELF section numbers to their sections. |
962 | This is only needed for the DWP V1 file format. */ | |
80626a55 DE |
963 | unsigned int num_sections; |
964 | asection **elf_sections; | |
965 | }; | |
966 | ||
36586728 TT |
967 | /* This represents a '.dwz' file. */ |
968 | ||
969 | struct dwz_file | |
970 | { | |
971 | /* A dwz file can only contain a few sections. */ | |
972 | struct dwarf2_section_info abbrev; | |
973 | struct dwarf2_section_info info; | |
974 | struct dwarf2_section_info str; | |
975 | struct dwarf2_section_info line; | |
976 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 977 | struct dwarf2_section_info gdb_index; |
36586728 TT |
978 | |
979 | /* The dwz's BFD. */ | |
980 | bfd *dwz_bfd; | |
981 | }; | |
982 | ||
0963b4bd MS |
983 | /* Struct used to pass misc. parameters to read_die_and_children, et |
984 | al. which are used for both .debug_info and .debug_types dies. | |
985 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 986 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
987 | |
988 | struct die_reader_specs | |
989 | { | |
a32a8923 | 990 | /* The bfd of die_section. */ |
93311388 DE |
991 | bfd* abfd; |
992 | ||
993 | /* The CU of the DIE we are parsing. */ | |
994 | struct dwarf2_cu *cu; | |
995 | ||
80626a55 | 996 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
997 | struct dwo_file *dwo_file; |
998 | ||
dee91e82 | 999 | /* The section the die comes from. |
3019eac3 | 1000 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
1001 | struct dwarf2_section_info *die_section; |
1002 | ||
1003 | /* die_section->buffer. */ | |
d521ce57 | 1004 | const gdb_byte *buffer; |
f664829e DE |
1005 | |
1006 | /* The end of the buffer. */ | |
1007 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
1008 | |
1009 | /* The value of the DW_AT_comp_dir attribute. */ | |
1010 | const char *comp_dir; | |
93311388 DE |
1011 | }; |
1012 | ||
fd820528 | 1013 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 1014 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 1015 | const gdb_byte *info_ptr, |
dee91e82 DE |
1016 | struct die_info *comp_unit_die, |
1017 | int has_children, | |
1018 | void *data); | |
1019 | ||
debd256d JB |
1020 | /* The line number information for a compilation unit (found in the |
1021 | .debug_line section) begins with a "statement program header", | |
1022 | which contains the following information. */ | |
1023 | struct line_header | |
1024 | { | |
1025 | unsigned int total_length; | |
1026 | unsigned short version; | |
1027 | unsigned int header_length; | |
1028 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 1029 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
1030 | unsigned char default_is_stmt; |
1031 | int line_base; | |
1032 | unsigned char line_range; | |
1033 | unsigned char opcode_base; | |
1034 | ||
1035 | /* standard_opcode_lengths[i] is the number of operands for the | |
1036 | standard opcode whose value is i. This means that | |
1037 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1038 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
1039 | unsigned char *standard_opcode_lengths; | |
1040 | ||
1041 | /* The include_directories table. NOTE! These strings are not | |
1042 | allocated with xmalloc; instead, they are pointers into | |
1043 | debug_line_buffer. If you try to free them, `free' will get | |
1044 | indigestion. */ | |
1045 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 1046 | const char **include_dirs; |
debd256d JB |
1047 | |
1048 | /* The file_names table. NOTE! These strings are not allocated | |
1049 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
1050 | Don't try to free them directly. */ | |
1051 | unsigned int num_file_names, file_names_size; | |
1052 | struct file_entry | |
c906108c | 1053 | { |
d521ce57 | 1054 | const char *name; |
debd256d JB |
1055 | unsigned int dir_index; |
1056 | unsigned int mod_time; | |
1057 | unsigned int length; | |
aaa75496 | 1058 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 1059 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
1060 | } *file_names; |
1061 | ||
1062 | /* The start and end of the statement program following this | |
6502dd73 | 1063 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 1064 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 1065 | }; |
c906108c SS |
1066 | |
1067 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 1068 | need this much information. */ |
c906108c SS |
1069 | struct partial_die_info |
1070 | { | |
72bf9492 | 1071 | /* Offset of this DIE. */ |
b64f50a1 | 1072 | sect_offset offset; |
72bf9492 DJ |
1073 | |
1074 | /* DWARF-2 tag for this DIE. */ | |
1075 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1076 | ||
72bf9492 DJ |
1077 | /* Assorted flags describing the data found in this DIE. */ |
1078 | unsigned int has_children : 1; | |
1079 | unsigned int is_external : 1; | |
1080 | unsigned int is_declaration : 1; | |
1081 | unsigned int has_type : 1; | |
1082 | unsigned int has_specification : 1; | |
1083 | unsigned int has_pc_info : 1; | |
481860b3 | 1084 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
1085 | |
1086 | /* Flag set if the SCOPE field of this structure has been | |
1087 | computed. */ | |
1088 | unsigned int scope_set : 1; | |
1089 | ||
fa4028e9 JB |
1090 | /* Flag set if the DIE has a byte_size attribute. */ |
1091 | unsigned int has_byte_size : 1; | |
1092 | ||
98bfdba5 PA |
1093 | /* Flag set if any of the DIE's children are template arguments. */ |
1094 | unsigned int has_template_arguments : 1; | |
1095 | ||
abc72ce4 DE |
1096 | /* Flag set if fixup_partial_die has been called on this die. */ |
1097 | unsigned int fixup_called : 1; | |
1098 | ||
36586728 TT |
1099 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1100 | unsigned int is_dwz : 1; | |
1101 | ||
1102 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1103 | unsigned int spec_is_dwz : 1; | |
1104 | ||
72bf9492 | 1105 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1106 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 1107 | const char *name; |
72bf9492 | 1108 | |
abc72ce4 DE |
1109 | /* The linkage name, if present. */ |
1110 | const char *linkage_name; | |
1111 | ||
72bf9492 DJ |
1112 | /* The scope to prepend to our children. This is generally |
1113 | allocated on the comp_unit_obstack, so will disappear | |
1114 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1115 | const char *scope; |
72bf9492 | 1116 | |
95554aad TT |
1117 | /* Some data associated with the partial DIE. The tag determines |
1118 | which field is live. */ | |
1119 | union | |
1120 | { | |
1121 | /* The location description associated with this DIE, if any. */ | |
1122 | struct dwarf_block *locdesc; | |
1123 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1124 | sect_offset offset; | |
1125 | } d; | |
72bf9492 DJ |
1126 | |
1127 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1128 | CORE_ADDR lowpc; |
1129 | CORE_ADDR highpc; | |
72bf9492 | 1130 | |
93311388 | 1131 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1132 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1133 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1134 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1135 | const gdb_byte *sibling; |
72bf9492 DJ |
1136 | |
1137 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1138 | DW_AT_specification (or DW_AT_abstract_origin or | |
1139 | DW_AT_extension). */ | |
b64f50a1 | 1140 | sect_offset spec_offset; |
72bf9492 DJ |
1141 | |
1142 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1143 | if any. */ | |
1144 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1145 | }; |
1146 | ||
0963b4bd | 1147 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1148 | struct abbrev_info |
1149 | { | |
1150 | unsigned int number; /* number identifying abbrev */ | |
1151 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1152 | unsigned short has_children; /* boolean */ |
1153 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1154 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1155 | struct abbrev_info *next; /* next in chain */ | |
1156 | }; | |
1157 | ||
1158 | struct attr_abbrev | |
1159 | { | |
9d25dd43 DE |
1160 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1161 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1162 | }; |
1163 | ||
433df2d4 DE |
1164 | /* Size of abbrev_table.abbrev_hash_table. */ |
1165 | #define ABBREV_HASH_SIZE 121 | |
1166 | ||
1167 | /* Top level data structure to contain an abbreviation table. */ | |
1168 | ||
1169 | struct abbrev_table | |
1170 | { | |
f4dc4d17 DE |
1171 | /* Where the abbrev table came from. |
1172 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1173 | sect_offset offset; |
1174 | ||
1175 | /* Storage for the abbrev table. */ | |
1176 | struct obstack abbrev_obstack; | |
1177 | ||
1178 | /* Hash table of abbrevs. | |
1179 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1180 | It could be statically allocated, but the previous code didn't so we | |
1181 | don't either. */ | |
1182 | struct abbrev_info **abbrevs; | |
1183 | }; | |
1184 | ||
0963b4bd | 1185 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1186 | struct attribute |
1187 | { | |
9d25dd43 | 1188 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1189 | ENUM_BITFIELD(dwarf_form) form : 15; |
1190 | ||
1191 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1192 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1193 | here for better struct attribute alignment. */ | |
1194 | unsigned int string_is_canonical : 1; | |
1195 | ||
b60c80d6 DJ |
1196 | union |
1197 | { | |
15d034d0 | 1198 | const char *str; |
b60c80d6 | 1199 | struct dwarf_block *blk; |
43bbcdc2 PH |
1200 | ULONGEST unsnd; |
1201 | LONGEST snd; | |
b60c80d6 | 1202 | CORE_ADDR addr; |
ac9ec31b | 1203 | ULONGEST signature; |
b60c80d6 DJ |
1204 | } |
1205 | u; | |
1206 | }; | |
1207 | ||
0963b4bd | 1208 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1209 | struct die_info |
1210 | { | |
76815b17 DE |
1211 | /* DWARF-2 tag for this DIE. */ |
1212 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1213 | ||
1214 | /* Number of attributes */ | |
98bfdba5 PA |
1215 | unsigned char num_attrs; |
1216 | ||
1217 | /* True if we're presently building the full type name for the | |
1218 | type derived from this DIE. */ | |
1219 | unsigned char building_fullname : 1; | |
76815b17 | 1220 | |
adde2bff DE |
1221 | /* True if this die is in process. PR 16581. */ |
1222 | unsigned char in_process : 1; | |
1223 | ||
76815b17 DE |
1224 | /* Abbrev number */ |
1225 | unsigned int abbrev; | |
1226 | ||
93311388 | 1227 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1228 | sect_offset offset; |
78ba4af6 JB |
1229 | |
1230 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1231 | points to this die's parent; CHILD points to the first child of | |
1232 | this node; and all the children of a given node are chained | |
4950bc1c | 1233 | together via their SIBLING fields. */ |
639d11d3 DC |
1234 | struct die_info *child; /* Its first child, if any. */ |
1235 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1236 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1237 | |
b60c80d6 DJ |
1238 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1239 | zero, but it's not common and zero-sized arrays are not | |
1240 | sufficiently portable C. */ | |
1241 | struct attribute attrs[1]; | |
c906108c SS |
1242 | }; |
1243 | ||
0963b4bd | 1244 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1245 | |
1246 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1247 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1248 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1249 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1250 | #define DW_SND(attr) ((attr)->u.snd) | |
1251 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1252 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1253 | |
0963b4bd | 1254 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1255 | struct dwarf_block |
1256 | { | |
56eb65bd | 1257 | size_t size; |
1d6edc3c JK |
1258 | |
1259 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1260 | const gdb_byte *data; |
c906108c SS |
1261 | }; |
1262 | ||
c906108c SS |
1263 | #ifndef ATTR_ALLOC_CHUNK |
1264 | #define ATTR_ALLOC_CHUNK 4 | |
1265 | #endif | |
1266 | ||
c906108c SS |
1267 | /* Allocate fields for structs, unions and enums in this size. */ |
1268 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1269 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1270 | #endif | |
1271 | ||
c906108c SS |
1272 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1273 | but this would require a corresponding change in unpack_field_as_long | |
1274 | and friends. */ | |
1275 | static int bits_per_byte = 8; | |
1276 | ||
1277 | /* The routines that read and process dies for a C struct or C++ class | |
1278 | pass lists of data member fields and lists of member function fields | |
1279 | in an instance of a field_info structure, as defined below. */ | |
1280 | struct field_info | |
c5aa993b | 1281 | { |
0963b4bd | 1282 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1283 | struct nextfield |
1284 | { | |
1285 | struct nextfield *next; | |
1286 | int accessibility; | |
1287 | int virtuality; | |
1288 | struct field field; | |
1289 | } | |
7d0ccb61 | 1290 | *fields, *baseclasses; |
c906108c | 1291 | |
7d0ccb61 | 1292 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1293 | int nfields; |
c906108c | 1294 | |
c5aa993b JM |
1295 | /* Number of baseclasses. */ |
1296 | int nbaseclasses; | |
c906108c | 1297 | |
c5aa993b JM |
1298 | /* Set if the accesibility of one of the fields is not public. */ |
1299 | int non_public_fields; | |
c906108c | 1300 | |
c5aa993b JM |
1301 | /* Member function fields array, entries are allocated in the order they |
1302 | are encountered in the object file. */ | |
1303 | struct nextfnfield | |
1304 | { | |
1305 | struct nextfnfield *next; | |
1306 | struct fn_field fnfield; | |
1307 | } | |
1308 | *fnfields; | |
c906108c | 1309 | |
c5aa993b JM |
1310 | /* Member function fieldlist array, contains name of possibly overloaded |
1311 | member function, number of overloaded member functions and a pointer | |
1312 | to the head of the member function field chain. */ | |
1313 | struct fnfieldlist | |
1314 | { | |
15d034d0 | 1315 | const char *name; |
c5aa993b JM |
1316 | int length; |
1317 | struct nextfnfield *head; | |
1318 | } | |
1319 | *fnfieldlists; | |
c906108c | 1320 | |
c5aa993b JM |
1321 | /* Number of entries in the fnfieldlists array. */ |
1322 | int nfnfields; | |
98751a41 JK |
1323 | |
1324 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1325 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1326 | struct typedef_field_list | |
1327 | { | |
1328 | struct typedef_field field; | |
1329 | struct typedef_field_list *next; | |
1330 | } | |
1331 | *typedef_field_list; | |
1332 | unsigned typedef_field_list_count; | |
c5aa993b | 1333 | }; |
c906108c | 1334 | |
10b3939b DJ |
1335 | /* One item on the queue of compilation units to read in full symbols |
1336 | for. */ | |
1337 | struct dwarf2_queue_item | |
1338 | { | |
1339 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1340 | enum language pretend_language; |
10b3939b DJ |
1341 | struct dwarf2_queue_item *next; |
1342 | }; | |
1343 | ||
1344 | /* The current queue. */ | |
1345 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1346 | ||
ae038cb0 DJ |
1347 | /* Loaded secondary compilation units are kept in memory until they |
1348 | have not been referenced for the processing of this many | |
1349 | compilation units. Set this to zero to disable caching. Cache | |
1350 | sizes of up to at least twenty will improve startup time for | |
1351 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1352 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1353 | static void |
1354 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1355 | struct cmd_list_element *c, const char *value) | |
1356 | { | |
3e43a32a MS |
1357 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1358 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1359 | value); |
1360 | } | |
4390d890 | 1361 | \f |
c906108c SS |
1362 | /* local function prototypes */ |
1363 | ||
a32a8923 DE |
1364 | static const char *get_section_name (const struct dwarf2_section_info *); |
1365 | ||
1366 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1367 | ||
4efb68b1 | 1368 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1369 | |
918dd910 JK |
1370 | static void dwarf2_find_base_address (struct die_info *die, |
1371 | struct dwarf2_cu *cu); | |
1372 | ||
0018ea6f DE |
1373 | static struct partial_symtab *create_partial_symtab |
1374 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1375 | ||
c67a9c90 | 1376 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1377 | |
72bf9492 DJ |
1378 | static void scan_partial_symbols (struct partial_die_info *, |
1379 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1380 | int, struct dwarf2_cu *); |
c906108c | 1381 | |
72bf9492 DJ |
1382 | static void add_partial_symbol (struct partial_die_info *, |
1383 | struct dwarf2_cu *); | |
63d06c5c | 1384 | |
72bf9492 DJ |
1385 | static void add_partial_namespace (struct partial_die_info *pdi, |
1386 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1387 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1388 | |
5d7cb8df JK |
1389 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1390 | CORE_ADDR *highpc, int need_pc, | |
1391 | struct dwarf2_cu *cu); | |
1392 | ||
72bf9492 DJ |
1393 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1394 | struct dwarf2_cu *cu); | |
91c24f0a | 1395 | |
bc30ff58 JB |
1396 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1397 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1398 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1399 | |
257e7a09 YQ |
1400 | static void dwarf2_read_symtab (struct partial_symtab *, |
1401 | struct objfile *); | |
c906108c | 1402 | |
a14ed312 | 1403 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1404 | |
433df2d4 DE |
1405 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1406 | (const struct abbrev_table *, unsigned int); | |
1407 | ||
1408 | static struct abbrev_table *abbrev_table_read_table | |
1409 | (struct dwarf2_section_info *, sect_offset); | |
1410 | ||
1411 | static void abbrev_table_free (struct abbrev_table *); | |
1412 | ||
f4dc4d17 DE |
1413 | static void abbrev_table_free_cleanup (void *); |
1414 | ||
dee91e82 DE |
1415 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1416 | struct dwarf2_section_info *); | |
c906108c | 1417 | |
f3dd6933 | 1418 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1419 | |
d521ce57 | 1420 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1421 | |
dee91e82 | 1422 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1423 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1424 | |
d521ce57 TT |
1425 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1426 | struct partial_die_info *, | |
1427 | struct abbrev_info *, | |
1428 | unsigned int, | |
1429 | const gdb_byte *); | |
c906108c | 1430 | |
36586728 | 1431 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1432 | struct dwarf2_cu *); |
72bf9492 DJ |
1433 | |
1434 | static void fixup_partial_die (struct partial_die_info *, | |
1435 | struct dwarf2_cu *); | |
1436 | ||
d521ce57 TT |
1437 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1438 | struct attribute *, struct attr_abbrev *, | |
1439 | const gdb_byte *); | |
a8329558 | 1440 | |
a1855c1d | 1441 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1442 | |
a1855c1d | 1443 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1444 | |
a1855c1d | 1445 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1446 | |
a1855c1d | 1447 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1448 | |
a1855c1d | 1449 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1450 | |
d521ce57 | 1451 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1452 | unsigned int *); |
c906108c | 1453 | |
d521ce57 | 1454 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1455 | |
1456 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1457 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1458 | unsigned int *, unsigned int *); |
613e1657 | 1459 | |
d521ce57 TT |
1460 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1461 | const struct comp_unit_head *, | |
c764a876 DE |
1462 | unsigned int *); |
1463 | ||
d521ce57 | 1464 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1465 | |
f4dc4d17 DE |
1466 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1467 | sect_offset); | |
1468 | ||
d521ce57 | 1469 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1470 | |
d521ce57 | 1471 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1472 | |
d521ce57 TT |
1473 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1474 | const struct comp_unit_head *, | |
1475 | unsigned int *); | |
4bdf3d34 | 1476 | |
d521ce57 | 1477 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1478 | |
d521ce57 | 1479 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1480 | |
d521ce57 | 1481 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1482 | |
d521ce57 TT |
1483 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1484 | const gdb_byte *, | |
3019eac3 DE |
1485 | unsigned int *); |
1486 | ||
d521ce57 | 1487 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1488 | ULONGEST str_index); |
3019eac3 | 1489 | |
e142c38c | 1490 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1491 | |
e142c38c DJ |
1492 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1493 | struct dwarf2_cu *); | |
c906108c | 1494 | |
348e048f | 1495 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1496 | unsigned int); |
348e048f | 1497 | |
05cf31d1 JB |
1498 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1499 | struct dwarf2_cu *cu); | |
1500 | ||
e142c38c | 1501 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1502 | |
e142c38c | 1503 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1504 | struct dwarf2_cu **); |
63d06c5c | 1505 | |
debd256d JB |
1506 | static void free_line_header (struct line_header *lh); |
1507 | ||
3019eac3 DE |
1508 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1509 | struct dwarf2_cu *cu); | |
debd256d | 1510 | |
f3f5162e DE |
1511 | static void dwarf_decode_lines (struct line_header *, const char *, |
1512 | struct dwarf2_cu *, struct partial_symtab *, | |
1513 | int); | |
c906108c | 1514 | |
d521ce57 | 1515 | static void dwarf2_start_subfile (const char *, const char *, const char *); |
c906108c | 1516 | |
f4dc4d17 | 1517 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
15d034d0 | 1518 | const char *, const char *, CORE_ADDR); |
f4dc4d17 | 1519 | |
a14ed312 | 1520 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1521 | struct dwarf2_cu *); |
c906108c | 1522 | |
34eaf542 TT |
1523 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1524 | struct dwarf2_cu *, struct symbol *); | |
1525 | ||
ff39bb5e | 1526 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1527 | struct dwarf2_cu *); |
c906108c | 1528 | |
ff39bb5e | 1529 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1530 | struct type *type, |
1531 | const char *name, | |
1532 | struct obstack *obstack, | |
12df843f | 1533 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1534 | const gdb_byte **bytes, |
98bfdba5 | 1535 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1536 | |
e7c27a73 | 1537 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1538 | |
b4ba55a1 JB |
1539 | static int need_gnat_info (struct dwarf2_cu *); |
1540 | ||
3e43a32a MS |
1541 | static struct type *die_descriptive_type (struct die_info *, |
1542 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1543 | |
1544 | static void set_descriptive_type (struct type *, struct die_info *, | |
1545 | struct dwarf2_cu *); | |
1546 | ||
e7c27a73 DJ |
1547 | static struct type *die_containing_type (struct die_info *, |
1548 | struct dwarf2_cu *); | |
c906108c | 1549 | |
ff39bb5e | 1550 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1551 | struct dwarf2_cu *); |
c906108c | 1552 | |
f792889a | 1553 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1554 | |
673bfd45 DE |
1555 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1556 | ||
0d5cff50 | 1557 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1558 | |
6e70227d | 1559 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1560 | const char *suffix, int physname, |
1561 | struct dwarf2_cu *cu); | |
63d06c5c | 1562 | |
e7c27a73 | 1563 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1564 | |
348e048f DE |
1565 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1566 | ||
e7c27a73 | 1567 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1568 | |
e7c27a73 | 1569 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1570 | |
96408a79 SA |
1571 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1572 | ||
ff013f42 JK |
1573 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1574 | struct dwarf2_cu *, struct partial_symtab *); | |
1575 | ||
a14ed312 | 1576 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1577 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1578 | struct partial_symtab *); | |
c906108c | 1579 | |
fae299cd DC |
1580 | static void get_scope_pc_bounds (struct die_info *, |
1581 | CORE_ADDR *, CORE_ADDR *, | |
1582 | struct dwarf2_cu *); | |
1583 | ||
801e3a5b JB |
1584 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1585 | CORE_ADDR, struct dwarf2_cu *); | |
1586 | ||
a14ed312 | 1587 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1588 | struct dwarf2_cu *); |
c906108c | 1589 | |
a14ed312 | 1590 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1591 | struct type *, struct dwarf2_cu *); |
c906108c | 1592 | |
a14ed312 | 1593 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1594 | struct die_info *, struct type *, |
e7c27a73 | 1595 | struct dwarf2_cu *); |
c906108c | 1596 | |
a14ed312 | 1597 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1598 | struct type *, |
1599 | struct dwarf2_cu *); | |
c906108c | 1600 | |
134d01f1 | 1601 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1602 | |
e7c27a73 | 1603 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1604 | |
e7c27a73 | 1605 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1606 | |
5d7cb8df JK |
1607 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1608 | ||
27aa8d6a SW |
1609 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1610 | ||
74921315 KS |
1611 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1612 | ||
f55ee35c JK |
1613 | static struct type *read_module_type (struct die_info *die, |
1614 | struct dwarf2_cu *cu); | |
1615 | ||
38d518c9 | 1616 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1617 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1618 | |
134d01f1 | 1619 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1620 | |
e7c27a73 | 1621 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1622 | |
6e70227d | 1623 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1624 | struct dwarf2_cu *); |
1625 | ||
bf6af496 | 1626 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1627 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1628 | struct die_info *); |
639d11d3 | 1629 | |
dee91e82 | 1630 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1631 | const gdb_byte *info_ptr, |
1632 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1633 | struct die_info *parent); |
1634 | ||
d521ce57 TT |
1635 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1636 | struct die_info **, const gdb_byte *, | |
1637 | int *, int); | |
3019eac3 | 1638 | |
d521ce57 TT |
1639 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1640 | struct die_info **, const gdb_byte *, | |
1641 | int *); | |
93311388 | 1642 | |
e7c27a73 | 1643 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1644 | |
15d034d0 TT |
1645 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1646 | struct obstack *); | |
71c25dea | 1647 | |
15d034d0 | 1648 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1649 | |
15d034d0 | 1650 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1651 | struct die_info *die, |
1652 | struct dwarf2_cu *cu); | |
1653 | ||
ca69b9e6 DE |
1654 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1655 | struct dwarf2_cu *cu); | |
1656 | ||
e142c38c | 1657 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1658 | struct dwarf2_cu **); |
9219021c | 1659 | |
f39c6ffd | 1660 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1661 | |
f39c6ffd | 1662 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1663 | |
f39c6ffd | 1664 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1665 | |
a14ed312 | 1666 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1667 | |
f39c6ffd | 1668 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1669 | |
f9aca02d | 1670 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1671 | |
d97bc12b DE |
1672 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1673 | ||
1674 | static void dump_die_for_error (struct die_info *); | |
1675 | ||
1676 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1677 | struct die_info *); | |
c906108c | 1678 | |
d97bc12b | 1679 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1680 | |
51545339 | 1681 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1682 | struct dwarf2_cu *); |
c906108c | 1683 | |
ff39bb5e | 1684 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1685 | |
ff39bb5e | 1686 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1687 | |
348e048f | 1688 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1689 | const struct attribute *, |
348e048f DE |
1690 | struct dwarf2_cu **); |
1691 | ||
10b3939b | 1692 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1693 | const struct attribute *, |
f2f0e013 | 1694 | struct dwarf2_cu **); |
c906108c | 1695 | |
348e048f | 1696 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1697 | const struct attribute *, |
348e048f DE |
1698 | struct dwarf2_cu **); |
1699 | ||
ac9ec31b DE |
1700 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1701 | struct dwarf2_cu *); | |
1702 | ||
1703 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1704 | const struct attribute *, |
ac9ec31b DE |
1705 | struct dwarf2_cu *); |
1706 | ||
e5fe5e75 | 1707 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1708 | |
52dc124a | 1709 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1710 | |
c906108c SS |
1711 | /* memory allocation interface */ |
1712 | ||
7b5a2f43 | 1713 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1714 | |
b60c80d6 | 1715 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1716 | |
09262596 | 1717 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
15d034d0 | 1718 | const char *, int); |
2e276125 | 1719 | |
6e5a29e1 | 1720 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1721 | |
6e5a29e1 | 1722 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1723 | |
6e5a29e1 | 1724 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1725 | |
6e5a29e1 | 1726 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1727 | |
8cf6f0b1 TT |
1728 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1729 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1730 | const struct attribute *attr); |
8cf6f0b1 | 1731 | |
ff39bb5e | 1732 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1733 | struct symbol *sym, |
f1e6e072 TT |
1734 | struct dwarf2_cu *cu, |
1735 | int is_block); | |
4c2df51b | 1736 | |
d521ce57 TT |
1737 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1738 | const gdb_byte *info_ptr, | |
1739 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1740 | |
72bf9492 DJ |
1741 | static void free_stack_comp_unit (void *); |
1742 | ||
72bf9492 DJ |
1743 | static hashval_t partial_die_hash (const void *item); |
1744 | ||
1745 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1746 | ||
ae038cb0 | 1747 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1748 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1749 | |
9816fde3 | 1750 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1751 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1752 | |
1753 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1754 | struct die_info *comp_unit_die, |
1755 | enum language pretend_language); | |
93311388 | 1756 | |
68dc6402 | 1757 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1758 | |
1759 | static void free_cached_comp_units (void *); | |
1760 | ||
1761 | static void age_cached_comp_units (void); | |
1762 | ||
dee91e82 | 1763 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1764 | |
f792889a DJ |
1765 | static struct type *set_die_type (struct die_info *, struct type *, |
1766 | struct dwarf2_cu *); | |
1c379e20 | 1767 | |
ae038cb0 DJ |
1768 | static void create_all_comp_units (struct objfile *); |
1769 | ||
0e50663e | 1770 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1771 | |
95554aad TT |
1772 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1773 | enum language); | |
10b3939b | 1774 | |
95554aad TT |
1775 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1776 | enum language); | |
10b3939b | 1777 | |
f4dc4d17 DE |
1778 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1779 | enum language); | |
1780 | ||
10b3939b DJ |
1781 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1782 | struct dwarf2_per_cu_data *); | |
1783 | ||
ae038cb0 DJ |
1784 | static void dwarf2_mark (struct dwarf2_cu *); |
1785 | ||
1786 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1787 | ||
b64f50a1 | 1788 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1789 | struct dwarf2_per_cu_data *); |
673bfd45 | 1790 | |
f792889a | 1791 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1792 | |
9291a0cd TT |
1793 | static void dwarf2_release_queue (void *dummy); |
1794 | ||
95554aad TT |
1795 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1796 | enum language pretend_language); | |
1797 | ||
a0f42c21 | 1798 | static void process_queue (void); |
9291a0cd TT |
1799 | |
1800 | static void find_file_and_directory (struct die_info *die, | |
1801 | struct dwarf2_cu *cu, | |
15d034d0 | 1802 | const char **name, const char **comp_dir); |
9291a0cd TT |
1803 | |
1804 | static char *file_full_name (int file, struct line_header *lh, | |
1805 | const char *comp_dir); | |
1806 | ||
d521ce57 | 1807 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1808 | (struct comp_unit_head *header, |
1809 | struct dwarf2_section_info *section, | |
d521ce57 | 1810 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1811 | int is_debug_types_section); |
1812 | ||
fd820528 | 1813 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1814 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1815 | int use_existing_cu, int keep, | |
3019eac3 DE |
1816 | die_reader_func_ftype *die_reader_func, void *data); |
1817 | ||
dee91e82 DE |
1818 | static void init_cutu_and_read_dies_simple |
1819 | (struct dwarf2_per_cu_data *this_cu, | |
1820 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1821 | |
673bfd45 | 1822 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1823 | |
3019eac3 DE |
1824 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1825 | ||
57d63ce2 DE |
1826 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1827 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1828 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1829 | |
1830 | static struct dwp_file *get_dwp_file (void); | |
1831 | ||
3019eac3 | 1832 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1833 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1834 | |
1835 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1836 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1837 | |
89e63ee4 DE |
1838 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1839 | ||
3019eac3 DE |
1840 | static void free_dwo_file_cleanup (void *); |
1841 | ||
95554aad TT |
1842 | static void process_cu_includes (void); |
1843 | ||
1b80a9fa | 1844 | static void check_producer (struct dwarf2_cu *cu); |
4390d890 DE |
1845 | \f |
1846 | /* Various complaints about symbol reading that don't abort the process. */ | |
1847 | ||
1848 | static void | |
1849 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1850 | { | |
1851 | complaint (&symfile_complaints, | |
1852 | _("statement list doesn't fit in .debug_line section")); | |
1853 | } | |
1854 | ||
1855 | static void | |
1856 | dwarf2_debug_line_missing_file_complaint (void) | |
1857 | { | |
1858 | complaint (&symfile_complaints, | |
1859 | _(".debug_line section has line data without a file")); | |
1860 | } | |
1861 | ||
1862 | static void | |
1863 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1864 | { | |
1865 | complaint (&symfile_complaints, | |
1866 | _(".debug_line section has line " | |
1867 | "program sequence without an end")); | |
1868 | } | |
1869 | ||
1870 | static void | |
1871 | dwarf2_complex_location_expr_complaint (void) | |
1872 | { | |
1873 | complaint (&symfile_complaints, _("location expression too complex")); | |
1874 | } | |
1875 | ||
1876 | static void | |
1877 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1878 | int arg3) | |
1879 | { | |
1880 | complaint (&symfile_complaints, | |
1881 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1882 | arg1, arg2, arg3); | |
1883 | } | |
1884 | ||
1885 | static void | |
1886 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1887 | { | |
1888 | complaint (&symfile_complaints, | |
1889 | _("debug info runs off end of %s section" | |
1890 | " [in module %s]"), | |
a32a8923 DE |
1891 | get_section_name (section), |
1892 | get_section_file_name (section)); | |
4390d890 | 1893 | } |
1b80a9fa | 1894 | |
4390d890 DE |
1895 | static void |
1896 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1897 | { | |
1898 | complaint (&symfile_complaints, | |
1899 | _("macro debug info contains a " | |
1900 | "malformed macro definition:\n`%s'"), | |
1901 | arg1); | |
1902 | } | |
1903 | ||
1904 | static void | |
1905 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1906 | { | |
1907 | complaint (&symfile_complaints, | |
1908 | _("invalid attribute class or form for '%s' in '%s'"), | |
1909 | arg1, arg2); | |
1910 | } | |
1911 | \f | |
9291a0cd TT |
1912 | #if WORDS_BIGENDIAN |
1913 | ||
1914 | /* Convert VALUE between big- and little-endian. */ | |
1915 | static offset_type | |
1916 | byte_swap (offset_type value) | |
1917 | { | |
1918 | offset_type result; | |
1919 | ||
1920 | result = (value & 0xff) << 24; | |
1921 | result |= (value & 0xff00) << 8; | |
1922 | result |= (value & 0xff0000) >> 8; | |
1923 | result |= (value & 0xff000000) >> 24; | |
1924 | return result; | |
1925 | } | |
1926 | ||
1927 | #define MAYBE_SWAP(V) byte_swap (V) | |
1928 | ||
1929 | #else | |
1930 | #define MAYBE_SWAP(V) (V) | |
1931 | #endif /* WORDS_BIGENDIAN */ | |
1932 | ||
31aa7e4e JB |
1933 | /* Read the given attribute value as an address, taking the attribute's |
1934 | form into account. */ | |
1935 | ||
1936 | static CORE_ADDR | |
1937 | attr_value_as_address (struct attribute *attr) | |
1938 | { | |
1939 | CORE_ADDR addr; | |
1940 | ||
1941 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) | |
1942 | { | |
1943 | /* Aside from a few clearly defined exceptions, attributes that | |
1944 | contain an address must always be in DW_FORM_addr form. | |
1945 | Unfortunately, some compilers happen to be violating this | |
1946 | requirement by encoding addresses using other forms, such | |
1947 | as DW_FORM_data4 for example. For those broken compilers, | |
1948 | we try to do our best, without any guarantee of success, | |
1949 | to interpret the address correctly. It would also be nice | |
1950 | to generate a complaint, but that would require us to maintain | |
1951 | a list of legitimate cases where a non-address form is allowed, | |
1952 | as well as update callers to pass in at least the CU's DWARF | |
1953 | version. This is more overhead than what we're willing to | |
1954 | expand for a pretty rare case. */ | |
1955 | addr = DW_UNSND (attr); | |
1956 | } | |
1957 | else | |
1958 | addr = DW_ADDR (attr); | |
1959 | ||
1960 | return addr; | |
1961 | } | |
1962 | ||
9291a0cd TT |
1963 | /* The suffix for an index file. */ |
1964 | #define INDEX_SUFFIX ".gdb-index" | |
1965 | ||
c906108c | 1966 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1967 | information and return true if we have enough to do something. |
1968 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1969 | ELF names are used. */ | |
c906108c SS |
1970 | |
1971 | int | |
251d32d9 TG |
1972 | dwarf2_has_info (struct objfile *objfile, |
1973 | const struct dwarf2_debug_sections *names) | |
c906108c | 1974 | { |
be391dca TT |
1975 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1976 | if (!dwarf2_per_objfile) | |
1977 | { | |
1978 | /* Initialize per-objfile state. */ | |
1979 | struct dwarf2_per_objfile *data | |
1980 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1981 | |
be391dca TT |
1982 | memset (data, 0, sizeof (*data)); |
1983 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1984 | dwarf2_per_objfile = data; | |
6502dd73 | 1985 | |
251d32d9 TG |
1986 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1987 | (void *) names); | |
be391dca TT |
1988 | dwarf2_per_objfile->objfile = objfile; |
1989 | } | |
73869dc2 DE |
1990 | return (!dwarf2_per_objfile->info.is_virtual |
1991 | && dwarf2_per_objfile->info.s.asection != NULL | |
1992 | && !dwarf2_per_objfile->abbrev.is_virtual | |
1993 | && dwarf2_per_objfile->abbrev.s.asection != NULL); | |
1994 | } | |
1995 | ||
1996 | /* Return the containing section of virtual section SECTION. */ | |
1997 | ||
1998 | static struct dwarf2_section_info * | |
1999 | get_containing_section (const struct dwarf2_section_info *section) | |
2000 | { | |
2001 | gdb_assert (section->is_virtual); | |
2002 | return section->s.containing_section; | |
c906108c SS |
2003 | } |
2004 | ||
a32a8923 DE |
2005 | /* Return the bfd owner of SECTION. */ |
2006 | ||
2007 | static struct bfd * | |
2008 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2009 | { | |
73869dc2 DE |
2010 | if (section->is_virtual) |
2011 | { | |
2012 | section = get_containing_section (section); | |
2013 | gdb_assert (!section->is_virtual); | |
2014 | } | |
2015 | return section->s.asection->owner; | |
a32a8923 DE |
2016 | } |
2017 | ||
2018 | /* Return the bfd section of SECTION. | |
2019 | Returns NULL if the section is not present. */ | |
2020 | ||
2021 | static asection * | |
2022 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2023 | { | |
73869dc2 DE |
2024 | if (section->is_virtual) |
2025 | { | |
2026 | section = get_containing_section (section); | |
2027 | gdb_assert (!section->is_virtual); | |
2028 | } | |
2029 | return section->s.asection; | |
a32a8923 DE |
2030 | } |
2031 | ||
2032 | /* Return the name of SECTION. */ | |
2033 | ||
2034 | static const char * | |
2035 | get_section_name (const struct dwarf2_section_info *section) | |
2036 | { | |
2037 | asection *sectp = get_section_bfd_section (section); | |
2038 | ||
2039 | gdb_assert (sectp != NULL); | |
2040 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2041 | } | |
2042 | ||
2043 | /* Return the name of the file SECTION is in. */ | |
2044 | ||
2045 | static const char * | |
2046 | get_section_file_name (const struct dwarf2_section_info *section) | |
2047 | { | |
2048 | bfd *abfd = get_section_bfd_owner (section); | |
2049 | ||
2050 | return bfd_get_filename (abfd); | |
2051 | } | |
2052 | ||
2053 | /* Return the id of SECTION. | |
2054 | Returns 0 if SECTION doesn't exist. */ | |
2055 | ||
2056 | static int | |
2057 | get_section_id (const struct dwarf2_section_info *section) | |
2058 | { | |
2059 | asection *sectp = get_section_bfd_section (section); | |
2060 | ||
2061 | if (sectp == NULL) | |
2062 | return 0; | |
2063 | return sectp->id; | |
2064 | } | |
2065 | ||
2066 | /* Return the flags of SECTION. | |
73869dc2 | 2067 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2068 | |
2069 | static int | |
2070 | get_section_flags (const struct dwarf2_section_info *section) | |
2071 | { | |
2072 | asection *sectp = get_section_bfd_section (section); | |
2073 | ||
2074 | gdb_assert (sectp != NULL); | |
2075 | return bfd_get_section_flags (sectp->owner, sectp); | |
2076 | } | |
2077 | ||
251d32d9 TG |
2078 | /* When loading sections, we look either for uncompressed section or for |
2079 | compressed section names. */ | |
233a11ab CS |
2080 | |
2081 | static int | |
251d32d9 TG |
2082 | section_is_p (const char *section_name, |
2083 | const struct dwarf2_section_names *names) | |
233a11ab | 2084 | { |
251d32d9 TG |
2085 | if (names->normal != NULL |
2086 | && strcmp (section_name, names->normal) == 0) | |
2087 | return 1; | |
2088 | if (names->compressed != NULL | |
2089 | && strcmp (section_name, names->compressed) == 0) | |
2090 | return 1; | |
2091 | return 0; | |
233a11ab CS |
2092 | } |
2093 | ||
c906108c SS |
2094 | /* This function is mapped across the sections and remembers the |
2095 | offset and size of each of the debugging sections we are interested | |
2096 | in. */ | |
2097 | ||
2098 | static void | |
251d32d9 | 2099 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 2100 | { |
251d32d9 | 2101 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 2102 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
2103 | |
2104 | if (vnames == NULL) | |
2105 | names = &dwarf2_elf_names; | |
2106 | else | |
2107 | names = (const struct dwarf2_debug_sections *) vnames; | |
2108 | ||
dc7650b8 JK |
2109 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2110 | { | |
2111 | } | |
2112 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 2113 | { |
73869dc2 | 2114 | dwarf2_per_objfile->info.s.asection = sectp; |
dce234bc | 2115 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); |
c906108c | 2116 | } |
251d32d9 | 2117 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 2118 | { |
73869dc2 | 2119 | dwarf2_per_objfile->abbrev.s.asection = sectp; |
dce234bc | 2120 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); |
c906108c | 2121 | } |
251d32d9 | 2122 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 2123 | { |
73869dc2 | 2124 | dwarf2_per_objfile->line.s.asection = sectp; |
dce234bc | 2125 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); |
c906108c | 2126 | } |
251d32d9 | 2127 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 2128 | { |
73869dc2 | 2129 | dwarf2_per_objfile->loc.s.asection = sectp; |
dce234bc | 2130 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); |
c906108c | 2131 | } |
251d32d9 | 2132 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 2133 | { |
73869dc2 | 2134 | dwarf2_per_objfile->macinfo.s.asection = sectp; |
dce234bc | 2135 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); |
c906108c | 2136 | } |
cf2c3c16 TT |
2137 | else if (section_is_p (sectp->name, &names->macro)) |
2138 | { | |
73869dc2 | 2139 | dwarf2_per_objfile->macro.s.asection = sectp; |
cf2c3c16 TT |
2140 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); |
2141 | } | |
251d32d9 | 2142 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 2143 | { |
73869dc2 | 2144 | dwarf2_per_objfile->str.s.asection = sectp; |
dce234bc | 2145 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); |
c906108c | 2146 | } |
3019eac3 DE |
2147 | else if (section_is_p (sectp->name, &names->addr)) |
2148 | { | |
73869dc2 | 2149 | dwarf2_per_objfile->addr.s.asection = sectp; |
3019eac3 DE |
2150 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); |
2151 | } | |
251d32d9 | 2152 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 2153 | { |
73869dc2 | 2154 | dwarf2_per_objfile->frame.s.asection = sectp; |
dce234bc | 2155 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2156 | } |
251d32d9 | 2157 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 2158 | { |
73869dc2 | 2159 | dwarf2_per_objfile->eh_frame.s.asection = sectp; |
dc7650b8 | 2160 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); |
b6af0555 | 2161 | } |
251d32d9 | 2162 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2163 | { |
73869dc2 | 2164 | dwarf2_per_objfile->ranges.s.asection = sectp; |
dce234bc | 2165 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); |
af34e669 | 2166 | } |
251d32d9 | 2167 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2168 | { |
8b70b953 TT |
2169 | struct dwarf2_section_info type_section; |
2170 | ||
2171 | memset (&type_section, 0, sizeof (type_section)); | |
73869dc2 | 2172 | type_section.s.asection = sectp; |
8b70b953 TT |
2173 | type_section.size = bfd_get_section_size (sectp); |
2174 | ||
2175 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2176 | &type_section); | |
348e048f | 2177 | } |
251d32d9 | 2178 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd | 2179 | { |
73869dc2 | 2180 | dwarf2_per_objfile->gdb_index.s.asection = sectp; |
9291a0cd TT |
2181 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); |
2182 | } | |
dce234bc | 2183 | |
72dca2f5 FR |
2184 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
2185 | && bfd_section_vma (abfd, sectp) == 0) | |
2186 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2187 | } |
2188 | ||
fceca515 DE |
2189 | /* A helper function that decides whether a section is empty, |
2190 | or not present. */ | |
9e0ac564 TT |
2191 | |
2192 | static int | |
19ac8c2e | 2193 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2194 | { |
73869dc2 DE |
2195 | if (section->is_virtual) |
2196 | return section->size == 0; | |
2197 | return section->s.asection == NULL || section->size == 0; | |
9e0ac564 TT |
2198 | } |
2199 | ||
3019eac3 DE |
2200 | /* Read the contents of the section INFO. |
2201 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2202 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2203 | of the DWO file. | |
dce234bc | 2204 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2205 | |
dce234bc PP |
2206 | static void |
2207 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2208 | { |
a32a8923 | 2209 | asection *sectp; |
3019eac3 | 2210 | bfd *abfd; |
dce234bc | 2211 | gdb_byte *buf, *retbuf; |
c906108c | 2212 | |
be391dca TT |
2213 | if (info->readin) |
2214 | return; | |
dce234bc | 2215 | info->buffer = NULL; |
be391dca | 2216 | info->readin = 1; |
188dd5d6 | 2217 | |
9e0ac564 | 2218 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2219 | return; |
c906108c | 2220 | |
a32a8923 | 2221 | sectp = get_section_bfd_section (info); |
3019eac3 | 2222 | |
73869dc2 DE |
2223 | /* If this is a virtual section we need to read in the real one first. */ |
2224 | if (info->is_virtual) | |
2225 | { | |
2226 | struct dwarf2_section_info *containing_section = | |
2227 | get_containing_section (info); | |
2228 | ||
2229 | gdb_assert (sectp != NULL); | |
2230 | if ((sectp->flags & SEC_RELOC) != 0) | |
2231 | { | |
2232 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2233 | " supported in section %s [in module %s]"), | |
2234 | get_section_name (info), get_section_file_name (info)); | |
2235 | } | |
2236 | dwarf2_read_section (objfile, containing_section); | |
2237 | /* Other code should have already caught virtual sections that don't | |
2238 | fit. */ | |
2239 | gdb_assert (info->virtual_offset + info->size | |
2240 | <= containing_section->size); | |
2241 | /* If the real section is empty or there was a problem reading the | |
2242 | section we shouldn't get here. */ | |
2243 | gdb_assert (containing_section->buffer != NULL); | |
2244 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2245 | return; | |
2246 | } | |
2247 | ||
4bf44c1c TT |
2248 | /* If the section has relocations, we must read it ourselves. |
2249 | Otherwise we attach it to the BFD. */ | |
2250 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2251 | { |
d521ce57 | 2252 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2253 | return; |
dce234bc | 2254 | } |
dce234bc | 2255 | |
4bf44c1c TT |
2256 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
2257 | info->buffer = buf; | |
dce234bc PP |
2258 | |
2259 | /* When debugging .o files, we may need to apply relocations; see | |
2260 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2261 | We never compress sections in .o files, so we only need to | |
2262 | try this when the section is not compressed. */ | |
ac8035ab | 2263 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2264 | if (retbuf != NULL) |
2265 | { | |
2266 | info->buffer = retbuf; | |
2267 | return; | |
2268 | } | |
2269 | ||
a32a8923 DE |
2270 | abfd = get_section_bfd_owner (info); |
2271 | gdb_assert (abfd != NULL); | |
2272 | ||
dce234bc PP |
2273 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2274 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2275 | { |
2276 | error (_("Dwarf Error: Can't read DWARF data" | |
2277 | " in section %s [in module %s]"), | |
2278 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2279 | } | |
dce234bc PP |
2280 | } |
2281 | ||
9e0ac564 TT |
2282 | /* A helper function that returns the size of a section in a safe way. |
2283 | If you are positive that the section has been read before using the | |
2284 | size, then it is safe to refer to the dwarf2_section_info object's | |
2285 | "size" field directly. In other cases, you must call this | |
2286 | function, because for compressed sections the size field is not set | |
2287 | correctly until the section has been read. */ | |
2288 | ||
2289 | static bfd_size_type | |
2290 | dwarf2_section_size (struct objfile *objfile, | |
2291 | struct dwarf2_section_info *info) | |
2292 | { | |
2293 | if (!info->readin) | |
2294 | dwarf2_read_section (objfile, info); | |
2295 | return info->size; | |
2296 | } | |
2297 | ||
dce234bc | 2298 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2299 | SECTION_NAME. */ |
af34e669 | 2300 | |
dce234bc | 2301 | void |
3017a003 TG |
2302 | dwarf2_get_section_info (struct objfile *objfile, |
2303 | enum dwarf2_section_enum sect, | |
d521ce57 | 2304 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2305 | bfd_size_type *sizep) |
2306 | { | |
2307 | struct dwarf2_per_objfile *data | |
2308 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
2309 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
2310 | |
2311 | /* We may see an objfile without any DWARF, in which case we just | |
2312 | return nothing. */ | |
2313 | if (data == NULL) | |
2314 | { | |
2315 | *sectp = NULL; | |
2316 | *bufp = NULL; | |
2317 | *sizep = 0; | |
2318 | return; | |
2319 | } | |
3017a003 TG |
2320 | switch (sect) |
2321 | { | |
2322 | case DWARF2_DEBUG_FRAME: | |
2323 | info = &data->frame; | |
2324 | break; | |
2325 | case DWARF2_EH_FRAME: | |
2326 | info = &data->eh_frame; | |
2327 | break; | |
2328 | default: | |
2329 | gdb_assert_not_reached ("unexpected section"); | |
2330 | } | |
dce234bc | 2331 | |
9e0ac564 | 2332 | dwarf2_read_section (objfile, info); |
dce234bc | 2333 | |
a32a8923 | 2334 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2335 | *bufp = info->buffer; |
2336 | *sizep = info->size; | |
2337 | } | |
2338 | ||
36586728 TT |
2339 | /* A helper function to find the sections for a .dwz file. */ |
2340 | ||
2341 | static void | |
2342 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2343 | { | |
2344 | struct dwz_file *dwz_file = arg; | |
2345 | ||
2346 | /* Note that we only support the standard ELF names, because .dwz | |
2347 | is ELF-only (at the time of writing). */ | |
2348 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2349 | { | |
73869dc2 | 2350 | dwz_file->abbrev.s.asection = sectp; |
36586728 TT |
2351 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2352 | } | |
2353 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2354 | { | |
73869dc2 | 2355 | dwz_file->info.s.asection = sectp; |
36586728 TT |
2356 | dwz_file->info.size = bfd_get_section_size (sectp); |
2357 | } | |
2358 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2359 | { | |
73869dc2 | 2360 | dwz_file->str.s.asection = sectp; |
36586728 TT |
2361 | dwz_file->str.size = bfd_get_section_size (sectp); |
2362 | } | |
2363 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2364 | { | |
73869dc2 | 2365 | dwz_file->line.s.asection = sectp; |
36586728 TT |
2366 | dwz_file->line.size = bfd_get_section_size (sectp); |
2367 | } | |
2368 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2369 | { | |
73869dc2 | 2370 | dwz_file->macro.s.asection = sectp; |
36586728 TT |
2371 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2372 | } | |
2ec9a5e0 TT |
2373 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2374 | { | |
73869dc2 | 2375 | dwz_file->gdb_index.s.asection = sectp; |
2ec9a5e0 TT |
2376 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2377 | } | |
36586728 TT |
2378 | } |
2379 | ||
4db1a1dc TT |
2380 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2381 | there is no .gnu_debugaltlink section in the file. Error if there | |
2382 | is such a section but the file cannot be found. */ | |
36586728 TT |
2383 | |
2384 | static struct dwz_file * | |
2385 | dwarf2_get_dwz_file (void) | |
2386 | { | |
4db1a1dc TT |
2387 | bfd *dwz_bfd; |
2388 | char *data; | |
36586728 TT |
2389 | struct cleanup *cleanup; |
2390 | const char *filename; | |
2391 | struct dwz_file *result; | |
acd13123 | 2392 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2393 | size_t buildid_len; |
2394 | bfd_byte *buildid; | |
36586728 TT |
2395 | |
2396 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2397 | return dwarf2_per_objfile->dwz_file; | |
2398 | ||
4db1a1dc TT |
2399 | bfd_set_error (bfd_error_no_error); |
2400 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2401 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2402 | if (data == NULL) |
2403 | { | |
2404 | if (bfd_get_error () == bfd_error_no_error) | |
2405 | return NULL; | |
2406 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2407 | bfd_errmsg (bfd_get_error ())); | |
2408 | } | |
36586728 | 2409 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2410 | make_cleanup (xfree, buildid); |
36586728 | 2411 | |
acd13123 TT |
2412 | buildid_len = (size_t) buildid_len_arg; |
2413 | ||
f9d83a0b | 2414 | filename = (const char *) data; |
36586728 TT |
2415 | if (!IS_ABSOLUTE_PATH (filename)) |
2416 | { | |
4262abfb | 2417 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2418 | char *rel; |
2419 | ||
2420 | make_cleanup (xfree, abs); | |
2421 | abs = ldirname (abs); | |
2422 | make_cleanup (xfree, abs); | |
2423 | ||
2424 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2425 | make_cleanup (xfree, rel); | |
2426 | filename = rel; | |
2427 | } | |
2428 | ||
dc294be5 TT |
2429 | /* First try the file name given in the section. If that doesn't |
2430 | work, try to use the build-id instead. */ | |
36586728 | 2431 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); |
dc294be5 | 2432 | if (dwz_bfd != NULL) |
36586728 | 2433 | { |
dc294be5 TT |
2434 | if (!build_id_verify (dwz_bfd, buildid_len, buildid)) |
2435 | { | |
2436 | gdb_bfd_unref (dwz_bfd); | |
2437 | dwz_bfd = NULL; | |
2438 | } | |
36586728 TT |
2439 | } |
2440 | ||
dc294be5 TT |
2441 | if (dwz_bfd == NULL) |
2442 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2443 | ||
2444 | if (dwz_bfd == NULL) | |
2445 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2446 | objfile_name (dwarf2_per_objfile->objfile)); | |
2447 | ||
36586728 TT |
2448 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2449 | struct dwz_file); | |
2450 | result->dwz_bfd = dwz_bfd; | |
2451 | ||
2452 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2453 | ||
2454 | do_cleanups (cleanup); | |
2455 | ||
13aaf454 | 2456 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd); |
8d2cc612 | 2457 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2458 | return result; |
2459 | } | |
9291a0cd | 2460 | \f |
7b9f3c50 DE |
2461 | /* DWARF quick_symbols_functions support. */ |
2462 | ||
2463 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2464 | unique line tables, so we maintain a separate table of all .debug_line | |
2465 | derived entries to support the sharing. | |
2466 | All the quick functions need is the list of file names. We discard the | |
2467 | line_header when we're done and don't need to record it here. */ | |
2468 | struct quick_file_names | |
2469 | { | |
094b34ac DE |
2470 | /* The data used to construct the hash key. */ |
2471 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2472 | |
2473 | /* The number of entries in file_names, real_names. */ | |
2474 | unsigned int num_file_names; | |
2475 | ||
2476 | /* The file names from the line table, after being run through | |
2477 | file_full_name. */ | |
2478 | const char **file_names; | |
2479 | ||
2480 | /* The file names from the line table after being run through | |
2481 | gdb_realpath. These are computed lazily. */ | |
2482 | const char **real_names; | |
2483 | }; | |
2484 | ||
2485 | /* When using the index (and thus not using psymtabs), each CU has an | |
2486 | object of this type. This is used to hold information needed by | |
2487 | the various "quick" methods. */ | |
2488 | struct dwarf2_per_cu_quick_data | |
2489 | { | |
2490 | /* The file table. This can be NULL if there was no file table | |
2491 | or it's currently not read in. | |
2492 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2493 | struct quick_file_names *file_names; | |
2494 | ||
2495 | /* The corresponding symbol table. This is NULL if symbols for this | |
2496 | CU have not yet been read. */ | |
2497 | struct symtab *symtab; | |
2498 | ||
2499 | /* A temporary mark bit used when iterating over all CUs in | |
2500 | expand_symtabs_matching. */ | |
2501 | unsigned int mark : 1; | |
2502 | ||
2503 | /* True if we've tried to read the file table and found there isn't one. | |
2504 | There will be no point in trying to read it again next time. */ | |
2505 | unsigned int no_file_data : 1; | |
2506 | }; | |
2507 | ||
094b34ac DE |
2508 | /* Utility hash function for a stmt_list_hash. */ |
2509 | ||
2510 | static hashval_t | |
2511 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2512 | { | |
2513 | hashval_t v = 0; | |
2514 | ||
2515 | if (stmt_list_hash->dwo_unit != NULL) | |
2516 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2517 | v += stmt_list_hash->line_offset.sect_off; | |
2518 | return v; | |
2519 | } | |
2520 | ||
2521 | /* Utility equality function for a stmt_list_hash. */ | |
2522 | ||
2523 | static int | |
2524 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2525 | const struct stmt_list_hash *rhs) | |
2526 | { | |
2527 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2528 | return 0; | |
2529 | if (lhs->dwo_unit != NULL | |
2530 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2531 | return 0; | |
2532 | ||
2533 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2534 | } | |
2535 | ||
7b9f3c50 DE |
2536 | /* Hash function for a quick_file_names. */ |
2537 | ||
2538 | static hashval_t | |
2539 | hash_file_name_entry (const void *e) | |
2540 | { | |
2541 | const struct quick_file_names *file_data = e; | |
2542 | ||
094b34ac | 2543 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2544 | } |
2545 | ||
2546 | /* Equality function for a quick_file_names. */ | |
2547 | ||
2548 | static int | |
2549 | eq_file_name_entry (const void *a, const void *b) | |
2550 | { | |
2551 | const struct quick_file_names *ea = a; | |
2552 | const struct quick_file_names *eb = b; | |
2553 | ||
094b34ac | 2554 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2555 | } |
2556 | ||
2557 | /* Delete function for a quick_file_names. */ | |
2558 | ||
2559 | static void | |
2560 | delete_file_name_entry (void *e) | |
2561 | { | |
2562 | struct quick_file_names *file_data = e; | |
2563 | int i; | |
2564 | ||
2565 | for (i = 0; i < file_data->num_file_names; ++i) | |
2566 | { | |
2567 | xfree ((void*) file_data->file_names[i]); | |
2568 | if (file_data->real_names) | |
2569 | xfree ((void*) file_data->real_names[i]); | |
2570 | } | |
2571 | ||
2572 | /* The space for the struct itself lives on objfile_obstack, | |
2573 | so we don't free it here. */ | |
2574 | } | |
2575 | ||
2576 | /* Create a quick_file_names hash table. */ | |
2577 | ||
2578 | static htab_t | |
2579 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2580 | { | |
2581 | return htab_create_alloc (nr_initial_entries, | |
2582 | hash_file_name_entry, eq_file_name_entry, | |
2583 | delete_file_name_entry, xcalloc, xfree); | |
2584 | } | |
9291a0cd | 2585 | |
918dd910 JK |
2586 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2587 | have to be created afterwards. You should call age_cached_comp_units after | |
2588 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2589 | ||
2590 | static void | |
2591 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2592 | { | |
3019eac3 | 2593 | if (per_cu->is_debug_types) |
e5fe5e75 | 2594 | load_full_type_unit (per_cu); |
918dd910 | 2595 | else |
95554aad | 2596 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2597 | |
918dd910 | 2598 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2599 | |
2600 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2601 | } |
2602 | ||
a0f42c21 | 2603 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2604 | |
9291a0cd | 2605 | static void |
a0f42c21 | 2606 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2607 | { |
2608 | struct cleanup *back_to; | |
2609 | ||
f4dc4d17 DE |
2610 | /* Skip type_unit_groups, reading the type units they contain |
2611 | is handled elsewhere. */ | |
2612 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2613 | return; | |
2614 | ||
9291a0cd TT |
2615 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2616 | ||
95554aad TT |
2617 | if (dwarf2_per_objfile->using_index |
2618 | ? per_cu->v.quick->symtab == NULL | |
2619 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2620 | { | |
2621 | queue_comp_unit (per_cu, language_minimal); | |
2622 | load_cu (per_cu); | |
89e63ee4 DE |
2623 | |
2624 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2625 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2626 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2627 | if (!per_cu->is_debug_types | |
2628 | && per_cu->cu->dwo_unit != NULL | |
2629 | && dwarf2_per_objfile->index_table != NULL | |
2630 | && dwarf2_per_objfile->index_table->version <= 7 | |
2631 | /* DWP files aren't supported yet. */ | |
2632 | && get_dwp_file () == NULL) | |
2633 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2634 | } |
9291a0cd | 2635 | |
a0f42c21 | 2636 | process_queue (); |
9291a0cd TT |
2637 | |
2638 | /* Age the cache, releasing compilation units that have not | |
2639 | been used recently. */ | |
2640 | age_cached_comp_units (); | |
2641 | ||
2642 | do_cleanups (back_to); | |
2643 | } | |
2644 | ||
2645 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2646 | the objfile from which this CU came. Returns the resulting symbol | |
2647 | table. */ | |
2fdf6df6 | 2648 | |
9291a0cd | 2649 | static struct symtab * |
a0f42c21 | 2650 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2651 | { |
95554aad | 2652 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2653 | if (!per_cu->v.quick->symtab) |
2654 | { | |
2655 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2656 | increment_reading_symtab (); | |
a0f42c21 | 2657 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2658 | process_cu_includes (); |
9291a0cd TT |
2659 | do_cleanups (back_to); |
2660 | } | |
2661 | return per_cu->v.quick->symtab; | |
2662 | } | |
2663 | ||
8832e7e3 | 2664 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2665 | |
2666 | This is intended for loops like: | |
2667 | ||
2668 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2669 | + dwarf2_per_objfile->n_type_units); ++i) | |
2670 | { | |
8832e7e3 | 2671 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2672 | |
2673 | ...; | |
2674 | } | |
2675 | */ | |
2fdf6df6 | 2676 | |
1fd400ff | 2677 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2678 | dw2_get_cutu (int index) |
1fd400ff TT |
2679 | { |
2680 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2681 | { | |
f4dc4d17 | 2682 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2683 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2684 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2685 | } |
2686 | ||
2687 | return dwarf2_per_objfile->all_comp_units[index]; | |
2688 | } | |
2689 | ||
8832e7e3 DE |
2690 | /* Return the CU given its index. |
2691 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2692 | refers to a CU. */ | |
f4dc4d17 DE |
2693 | |
2694 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2695 | dw2_get_cu (int index) |
f4dc4d17 | 2696 | { |
8832e7e3 | 2697 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2698 | |
1fd400ff TT |
2699 | return dwarf2_per_objfile->all_comp_units[index]; |
2700 | } | |
2701 | ||
2ec9a5e0 TT |
2702 | /* A helper for create_cus_from_index that handles a given list of |
2703 | CUs. */ | |
2fdf6df6 | 2704 | |
74a0d9f6 | 2705 | static void |
2ec9a5e0 TT |
2706 | create_cus_from_index_list (struct objfile *objfile, |
2707 | const gdb_byte *cu_list, offset_type n_elements, | |
2708 | struct dwarf2_section_info *section, | |
2709 | int is_dwz, | |
2710 | int base_offset) | |
9291a0cd TT |
2711 | { |
2712 | offset_type i; | |
9291a0cd | 2713 | |
2ec9a5e0 | 2714 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2715 | { |
2716 | struct dwarf2_per_cu_data *the_cu; | |
2717 | ULONGEST offset, length; | |
2718 | ||
74a0d9f6 JK |
2719 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2720 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2721 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2722 | cu_list += 2 * 8; |
2723 | ||
2724 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2725 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2726 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2727 | the_cu->length = length; |
2728 | the_cu->objfile = objfile; | |
8a0459fd | 2729 | the_cu->section = section; |
9291a0cd TT |
2730 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2731 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2732 | the_cu->is_dwz = is_dwz; |
2733 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2734 | } |
9291a0cd TT |
2735 | } |
2736 | ||
2ec9a5e0 | 2737 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2738 | the CU objects for this objfile. */ |
2ec9a5e0 | 2739 | |
74a0d9f6 | 2740 | static void |
2ec9a5e0 TT |
2741 | create_cus_from_index (struct objfile *objfile, |
2742 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2743 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2744 | { | |
2745 | struct dwz_file *dwz; | |
2746 | ||
2747 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2748 | dwarf2_per_objfile->all_comp_units | |
2749 | = obstack_alloc (&objfile->objfile_obstack, | |
2750 | dwarf2_per_objfile->n_comp_units | |
2751 | * sizeof (struct dwarf2_per_cu_data *)); | |
2752 | ||
74a0d9f6 JK |
2753 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2754 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2755 | |
2756 | if (dwz_elements == 0) | |
74a0d9f6 | 2757 | return; |
2ec9a5e0 TT |
2758 | |
2759 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2760 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2761 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2762 | } |
2763 | ||
1fd400ff | 2764 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2765 | |
74a0d9f6 | 2766 | static void |
673bfd45 | 2767 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2768 | struct dwarf2_section_info *section, |
673bfd45 DE |
2769 | const gdb_byte *bytes, |
2770 | offset_type elements) | |
1fd400ff TT |
2771 | { |
2772 | offset_type i; | |
673bfd45 | 2773 | htab_t sig_types_hash; |
1fd400ff | 2774 | |
d467dd73 DE |
2775 | dwarf2_per_objfile->n_type_units = elements / 3; |
2776 | dwarf2_per_objfile->all_type_units | |
a2ce51a0 DE |
2777 | = xmalloc (dwarf2_per_objfile->n_type_units |
2778 | * sizeof (struct signatured_type *)); | |
1fd400ff | 2779 | |
673bfd45 | 2780 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2781 | |
2782 | for (i = 0; i < elements; i += 3) | |
2783 | { | |
52dc124a DE |
2784 | struct signatured_type *sig_type; |
2785 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2786 | void **slot; |
2787 | ||
74a0d9f6 JK |
2788 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2789 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2790 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2791 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2792 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2793 | bytes += 3 * 8; | |
2794 | ||
52dc124a | 2795 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2796 | struct signatured_type); |
52dc124a | 2797 | sig_type->signature = signature; |
3019eac3 DE |
2798 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2799 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2800 | sig_type->per_cu.section = section; |
52dc124a DE |
2801 | sig_type->per_cu.offset.sect_off = offset; |
2802 | sig_type->per_cu.objfile = objfile; | |
2803 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2804 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2805 | struct dwarf2_per_cu_quick_data); | |
2806 | ||
52dc124a DE |
2807 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2808 | *slot = sig_type; | |
1fd400ff | 2809 | |
b4dd5633 | 2810 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2811 | } |
2812 | ||
673bfd45 | 2813 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2814 | } |
2815 | ||
9291a0cd TT |
2816 | /* Read the address map data from the mapped index, and use it to |
2817 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2818 | |
9291a0cd TT |
2819 | static void |
2820 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2821 | { | |
2822 | const gdb_byte *iter, *end; | |
2823 | struct obstack temp_obstack; | |
2824 | struct addrmap *mutable_map; | |
2825 | struct cleanup *cleanup; | |
2826 | CORE_ADDR baseaddr; | |
2827 | ||
2828 | obstack_init (&temp_obstack); | |
2829 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2830 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2831 | ||
2832 | iter = index->address_table; | |
2833 | end = iter + index->address_table_size; | |
2834 | ||
2835 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2836 | ||
2837 | while (iter < end) | |
2838 | { | |
2839 | ULONGEST hi, lo, cu_index; | |
2840 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2841 | iter += 8; | |
2842 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2843 | iter += 8; | |
2844 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2845 | iter += 4; | |
f652bce2 | 2846 | |
24a55014 | 2847 | if (lo > hi) |
f652bce2 | 2848 | { |
24a55014 DE |
2849 | complaint (&symfile_complaints, |
2850 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2851 | hex_string (lo), hex_string (hi)); |
24a55014 | 2852 | continue; |
f652bce2 | 2853 | } |
24a55014 DE |
2854 | |
2855 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2856 | { |
2857 | complaint (&symfile_complaints, | |
2858 | _(".gdb_index address table has invalid CU number %u"), | |
2859 | (unsigned) cu_index); | |
24a55014 | 2860 | continue; |
f652bce2 | 2861 | } |
24a55014 DE |
2862 | |
2863 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
8832e7e3 | 2864 | dw2_get_cutu (cu_index)); |
9291a0cd TT |
2865 | } |
2866 | ||
2867 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2868 | &objfile->objfile_obstack); | |
2869 | do_cleanups (cleanup); | |
2870 | } | |
2871 | ||
59d7bcaf JK |
2872 | /* The hash function for strings in the mapped index. This is the same as |
2873 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2874 | implementation. This is necessary because the hash function is tied to the | |
2875 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2876 | SYMBOL_HASH_NEXT. |
2877 | ||
2878 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2879 | |
9291a0cd | 2880 | static hashval_t |
559a7a62 | 2881 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2882 | { |
2883 | const unsigned char *str = (const unsigned char *) p; | |
2884 | hashval_t r = 0; | |
2885 | unsigned char c; | |
2886 | ||
2887 | while ((c = *str++) != 0) | |
559a7a62 JK |
2888 | { |
2889 | if (index_version >= 5) | |
2890 | c = tolower (c); | |
2891 | r = r * 67 + c - 113; | |
2892 | } | |
9291a0cd TT |
2893 | |
2894 | return r; | |
2895 | } | |
2896 | ||
2897 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2898 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2899 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2900 | |
9291a0cd TT |
2901 | static int |
2902 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2903 | offset_type **vec_out) | |
2904 | { | |
0cf03b49 JK |
2905 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2906 | offset_type hash; | |
9291a0cd | 2907 | offset_type slot, step; |
559a7a62 | 2908 | int (*cmp) (const char *, const char *); |
9291a0cd | 2909 | |
0cf03b49 JK |
2910 | if (current_language->la_language == language_cplus |
2911 | || current_language->la_language == language_java | |
2912 | || current_language->la_language == language_fortran) | |
2913 | { | |
2914 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2915 | not contain any. */ | |
2916 | const char *paren = strchr (name, '('); | |
2917 | ||
2918 | if (paren) | |
2919 | { | |
2920 | char *dup; | |
2921 | ||
2922 | dup = xmalloc (paren - name + 1); | |
2923 | memcpy (dup, name, paren - name); | |
2924 | dup[paren - name] = 0; | |
2925 | ||
2926 | make_cleanup (xfree, dup); | |
2927 | name = dup; | |
2928 | } | |
2929 | } | |
2930 | ||
559a7a62 | 2931 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2932 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2933 | simulate our NAME being searched is also lowercased. */ |
2934 | hash = mapped_index_string_hash ((index->version == 4 | |
2935 | && case_sensitivity == case_sensitive_off | |
2936 | ? 5 : index->version), | |
2937 | name); | |
2938 | ||
3876f04e DE |
2939 | slot = hash & (index->symbol_table_slots - 1); |
2940 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2941 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2942 | |
2943 | for (;;) | |
2944 | { | |
2945 | /* Convert a slot number to an offset into the table. */ | |
2946 | offset_type i = 2 * slot; | |
2947 | const char *str; | |
3876f04e | 2948 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2949 | { |
2950 | do_cleanups (back_to); | |
2951 | return 0; | |
2952 | } | |
9291a0cd | 2953 | |
3876f04e | 2954 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2955 | if (!cmp (name, str)) |
9291a0cd TT |
2956 | { |
2957 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2958 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2959 | do_cleanups (back_to); |
9291a0cd TT |
2960 | return 1; |
2961 | } | |
2962 | ||
3876f04e | 2963 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2964 | } |
2965 | } | |
2966 | ||
2ec9a5e0 TT |
2967 | /* A helper function that reads the .gdb_index from SECTION and fills |
2968 | in MAP. FILENAME is the name of the file containing the section; | |
2969 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2970 | ok to use deprecated sections. | |
2971 | ||
2972 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2973 | out parameters that are filled in with information about the CU and | |
2974 | TU lists in the section. | |
2975 | ||
2976 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2977 | |
9291a0cd | 2978 | static int |
2ec9a5e0 TT |
2979 | read_index_from_section (struct objfile *objfile, |
2980 | const char *filename, | |
2981 | int deprecated_ok, | |
2982 | struct dwarf2_section_info *section, | |
2983 | struct mapped_index *map, | |
2984 | const gdb_byte **cu_list, | |
2985 | offset_type *cu_list_elements, | |
2986 | const gdb_byte **types_list, | |
2987 | offset_type *types_list_elements) | |
9291a0cd | 2988 | { |
948f8e3d | 2989 | const gdb_byte *addr; |
2ec9a5e0 | 2990 | offset_type version; |
b3b272e1 | 2991 | offset_type *metadata; |
1fd400ff | 2992 | int i; |
9291a0cd | 2993 | |
2ec9a5e0 | 2994 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2995 | return 0; |
82430852 JK |
2996 | |
2997 | /* Older elfutils strip versions could keep the section in the main | |
2998 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 2999 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3000 | return 0; |
3001 | ||
2ec9a5e0 | 3002 | dwarf2_read_section (objfile, section); |
9291a0cd | 3003 | |
2ec9a5e0 | 3004 | addr = section->buffer; |
9291a0cd | 3005 | /* Version check. */ |
1fd400ff | 3006 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3007 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3008 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3009 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3010 | indices. */ |
831adc1f | 3011 | if (version < 4) |
481860b3 GB |
3012 | { |
3013 | static int warning_printed = 0; | |
3014 | if (!warning_printed) | |
3015 | { | |
3016 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3017 | filename); |
481860b3 GB |
3018 | warning_printed = 1; |
3019 | } | |
3020 | return 0; | |
3021 | } | |
3022 | /* Index version 4 uses a different hash function than index version | |
3023 | 5 and later. | |
3024 | ||
3025 | Versions earlier than 6 did not emit psymbols for inlined | |
3026 | functions. Using these files will cause GDB not to be able to | |
3027 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3028 | indices unless the user has done |
3029 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3030 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3031 | { |
3032 | static int warning_printed = 0; | |
3033 | if (!warning_printed) | |
3034 | { | |
e615022a DE |
3035 | warning (_("\ |
3036 | Skipping deprecated .gdb_index section in %s.\n\ | |
3037 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3038 | to use the section anyway."), | |
2ec9a5e0 | 3039 | filename); |
481860b3 GB |
3040 | warning_printed = 1; |
3041 | } | |
3042 | return 0; | |
3043 | } | |
796a7ff8 | 3044 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3045 | of the TU (for symbols coming from TUs), |
3046 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3047 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3048 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3049 | These are just performance bugs, and we can't distinguish gdb-generated | |
3050 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3051 | |
481860b3 | 3052 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3053 | longer backward compatible. */ |
796a7ff8 | 3054 | if (version > 8) |
594e8718 | 3055 | return 0; |
9291a0cd | 3056 | |
559a7a62 | 3057 | map->version = version; |
2ec9a5e0 | 3058 | map->total_size = section->size; |
9291a0cd TT |
3059 | |
3060 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3061 | |
3062 | i = 0; | |
2ec9a5e0 TT |
3063 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3064 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3065 | / 8); | |
1fd400ff TT |
3066 | ++i; |
3067 | ||
2ec9a5e0 TT |
3068 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3069 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3070 | - MAYBE_SWAP (metadata[i])) | |
3071 | / 8); | |
987d643c | 3072 | ++i; |
1fd400ff TT |
3073 | |
3074 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3075 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3076 | - MAYBE_SWAP (metadata[i])); | |
3077 | ++i; | |
3078 | ||
3876f04e DE |
3079 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3080 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3081 | - MAYBE_SWAP (metadata[i])) | |
3082 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3083 | ++i; |
9291a0cd | 3084 | |
f9d83a0b | 3085 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3086 | |
2ec9a5e0 TT |
3087 | return 1; |
3088 | } | |
3089 | ||
3090 | ||
3091 | /* Read the index file. If everything went ok, initialize the "quick" | |
3092 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3093 | ||
3094 | static int | |
3095 | dwarf2_read_index (struct objfile *objfile) | |
3096 | { | |
3097 | struct mapped_index local_map, *map; | |
3098 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3099 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3100 | struct dwz_file *dwz; |
2ec9a5e0 | 3101 | |
4262abfb | 3102 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3103 | use_deprecated_index_sections, |
3104 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3105 | &cu_list, &cu_list_elements, | |
3106 | &types_list, &types_list_elements)) | |
3107 | return 0; | |
3108 | ||
0fefef59 | 3109 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3110 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3111 | return 0; |
3112 | ||
2ec9a5e0 TT |
3113 | /* If there is a .dwz file, read it so we can get its CU list as |
3114 | well. */ | |
4db1a1dc TT |
3115 | dwz = dwarf2_get_dwz_file (); |
3116 | if (dwz != NULL) | |
2ec9a5e0 | 3117 | { |
2ec9a5e0 TT |
3118 | struct mapped_index dwz_map; |
3119 | const gdb_byte *dwz_types_ignore; | |
3120 | offset_type dwz_types_elements_ignore; | |
3121 | ||
3122 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3123 | 1, | |
3124 | &dwz->gdb_index, &dwz_map, | |
3125 | &dwz_list, &dwz_list_elements, | |
3126 | &dwz_types_ignore, | |
3127 | &dwz_types_elements_ignore)) | |
3128 | { | |
3129 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3130 | bfd_get_filename (dwz->dwz_bfd)); | |
3131 | return 0; | |
3132 | } | |
3133 | } | |
3134 | ||
74a0d9f6 JK |
3135 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3136 | dwz_list_elements); | |
1fd400ff | 3137 | |
8b70b953 TT |
3138 | if (types_list_elements) |
3139 | { | |
3140 | struct dwarf2_section_info *section; | |
3141 | ||
3142 | /* We can only handle a single .debug_types when we have an | |
3143 | index. */ | |
3144 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3145 | return 0; | |
3146 | ||
3147 | section = VEC_index (dwarf2_section_info_def, | |
3148 | dwarf2_per_objfile->types, 0); | |
3149 | ||
74a0d9f6 JK |
3150 | create_signatured_type_table_from_index (objfile, section, types_list, |
3151 | types_list_elements); | |
8b70b953 | 3152 | } |
9291a0cd | 3153 | |
2ec9a5e0 TT |
3154 | create_addrmap_from_index (objfile, &local_map); |
3155 | ||
3156 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
3157 | *map = local_map; | |
9291a0cd TT |
3158 | |
3159 | dwarf2_per_objfile->index_table = map; | |
3160 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3161 | dwarf2_per_objfile->quick_file_names_table = |
3162 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3163 | |
3164 | return 1; | |
3165 | } | |
3166 | ||
3167 | /* A helper for the "quick" functions which sets the global | |
3168 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3169 | |
9291a0cd TT |
3170 | static void |
3171 | dw2_setup (struct objfile *objfile) | |
3172 | { | |
3173 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
3174 | gdb_assert (dwarf2_per_objfile); | |
3175 | } | |
3176 | ||
dee91e82 | 3177 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3178 | |
dee91e82 DE |
3179 | static void |
3180 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3181 | const gdb_byte *info_ptr, |
dee91e82 DE |
3182 | struct die_info *comp_unit_die, |
3183 | int has_children, | |
3184 | void *data) | |
9291a0cd | 3185 | { |
dee91e82 DE |
3186 | struct dwarf2_cu *cu = reader->cu; |
3187 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3188 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3189 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3190 | struct line_header *lh; |
9291a0cd | 3191 | struct attribute *attr; |
dee91e82 | 3192 | int i; |
15d034d0 | 3193 | const char *name, *comp_dir; |
7b9f3c50 DE |
3194 | void **slot; |
3195 | struct quick_file_names *qfn; | |
3196 | unsigned int line_offset; | |
9291a0cd | 3197 | |
0186c6a7 DE |
3198 | gdb_assert (! this_cu->is_debug_types); |
3199 | ||
07261596 TT |
3200 | /* Our callers never want to match partial units -- instead they |
3201 | will match the enclosing full CU. */ | |
3202 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3203 | { | |
3204 | this_cu->v.quick->no_file_data = 1; | |
3205 | return; | |
3206 | } | |
3207 | ||
0186c6a7 | 3208 | lh_cu = this_cu; |
7b9f3c50 DE |
3209 | lh = NULL; |
3210 | slot = NULL; | |
3211 | line_offset = 0; | |
dee91e82 DE |
3212 | |
3213 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3214 | if (attr) |
3215 | { | |
7b9f3c50 DE |
3216 | struct quick_file_names find_entry; |
3217 | ||
3218 | line_offset = DW_UNSND (attr); | |
3219 | ||
3220 | /* We may have already read in this line header (TU line header sharing). | |
3221 | If we have we're done. */ | |
094b34ac DE |
3222 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3223 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3224 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3225 | &find_entry, INSERT); | |
3226 | if (*slot != NULL) | |
3227 | { | |
094b34ac | 3228 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 3229 | return; |
7b9f3c50 DE |
3230 | } |
3231 | ||
3019eac3 | 3232 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3233 | } |
3234 | if (lh == NULL) | |
3235 | { | |
094b34ac | 3236 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3237 | return; |
9291a0cd TT |
3238 | } |
3239 | ||
7b9f3c50 | 3240 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
3241 | qfn->hash.dwo_unit = cu->dwo_unit; |
3242 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3243 | gdb_assert (slot != NULL); |
3244 | *slot = qfn; | |
9291a0cd | 3245 | |
dee91e82 | 3246 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3247 | |
7b9f3c50 DE |
3248 | qfn->num_file_names = lh->num_file_names; |
3249 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
3250 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 3251 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3252 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3253 | qfn->real_names = NULL; | |
9291a0cd | 3254 | |
7b9f3c50 | 3255 | free_line_header (lh); |
7b9f3c50 | 3256 | |
094b34ac | 3257 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3258 | } |
3259 | ||
3260 | /* A helper for the "quick" functions which attempts to read the line | |
3261 | table for THIS_CU. */ | |
3262 | ||
3263 | static struct quick_file_names * | |
e4a48d9d | 3264 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3265 | { |
0186c6a7 DE |
3266 | /* This should never be called for TUs. */ |
3267 | gdb_assert (! this_cu->is_debug_types); | |
3268 | /* Nor type unit groups. */ | |
3269 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3270 | |
dee91e82 DE |
3271 | if (this_cu->v.quick->file_names != NULL) |
3272 | return this_cu->v.quick->file_names; | |
3273 | /* If we know there is no line data, no point in looking again. */ | |
3274 | if (this_cu->v.quick->no_file_data) | |
3275 | return NULL; | |
3276 | ||
0186c6a7 | 3277 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3278 | |
3279 | if (this_cu->v.quick->no_file_data) | |
3280 | return NULL; | |
3281 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3282 | } |
3283 | ||
3284 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3285 | real path for a given file name from the line table. */ |
2fdf6df6 | 3286 | |
9291a0cd | 3287 | static const char * |
7b9f3c50 DE |
3288 | dw2_get_real_path (struct objfile *objfile, |
3289 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3290 | { |
7b9f3c50 DE |
3291 | if (qfn->real_names == NULL) |
3292 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
fd0a4d76 | 3293 | qfn->num_file_names, char *); |
9291a0cd | 3294 | |
7b9f3c50 DE |
3295 | if (qfn->real_names[index] == NULL) |
3296 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3297 | |
7b9f3c50 | 3298 | return qfn->real_names[index]; |
9291a0cd TT |
3299 | } |
3300 | ||
3301 | static struct symtab * | |
3302 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3303 | { | |
3304 | int index; | |
ae2de4f8 | 3305 | |
9291a0cd TT |
3306 | dw2_setup (objfile); |
3307 | index = dwarf2_per_objfile->n_comp_units - 1; | |
8832e7e3 | 3308 | return dw2_instantiate_symtab (dw2_get_cutu (index)); |
9291a0cd TT |
3309 | } |
3310 | ||
7b9f3c50 DE |
3311 | /* Traversal function for dw2_forget_cached_source_info. */ |
3312 | ||
3313 | static int | |
3314 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3315 | { |
7b9f3c50 | 3316 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3317 | |
7b9f3c50 | 3318 | if (file_data->real_names) |
9291a0cd | 3319 | { |
7b9f3c50 | 3320 | int i; |
9291a0cd | 3321 | |
7b9f3c50 | 3322 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3323 | { |
7b9f3c50 DE |
3324 | xfree ((void*) file_data->real_names[i]); |
3325 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3326 | } |
3327 | } | |
7b9f3c50 DE |
3328 | |
3329 | return 1; | |
3330 | } | |
3331 | ||
3332 | static void | |
3333 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3334 | { | |
3335 | dw2_setup (objfile); | |
3336 | ||
3337 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3338 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3339 | } |
3340 | ||
f8eba3c6 TT |
3341 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3342 | the symtabs and calls the iterator. */ | |
3343 | ||
3344 | static int | |
3345 | dw2_map_expand_apply (struct objfile *objfile, | |
3346 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3347 | const char *name, const char *real_path, |
f8eba3c6 TT |
3348 | int (*callback) (struct symtab *, void *), |
3349 | void *data) | |
3350 | { | |
3351 | struct symtab *last_made = objfile->symtabs; | |
3352 | ||
3353 | /* Don't visit already-expanded CUs. */ | |
3354 | if (per_cu->v.quick->symtab) | |
3355 | return 0; | |
3356 | ||
3357 | /* This may expand more than one symtab, and we want to iterate over | |
3358 | all of them. */ | |
a0f42c21 | 3359 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3360 | |
f5b95b50 | 3361 | return iterate_over_some_symtabs (name, real_path, callback, data, |
f8eba3c6 TT |
3362 | objfile->symtabs, last_made); |
3363 | } | |
3364 | ||
3365 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3366 | ||
9291a0cd | 3367 | static int |
f8eba3c6 | 3368 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3369 | const char *real_path, |
f8eba3c6 TT |
3370 | int (*callback) (struct symtab *, void *), |
3371 | void *data) | |
9291a0cd TT |
3372 | { |
3373 | int i; | |
c011a4f4 | 3374 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3375 | |
3376 | dw2_setup (objfile); | |
ae2de4f8 | 3377 | |
848e3e78 DE |
3378 | /* The rule is CUs specify all the files, including those used by |
3379 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3380 | |
848e3e78 | 3381 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3382 | { |
3383 | int j; | |
8832e7e3 | 3384 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3385 | struct quick_file_names *file_data; |
9291a0cd | 3386 | |
3d7bb9d9 | 3387 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3388 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3389 | continue; |
3390 | ||
e4a48d9d | 3391 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3392 | if (file_data == NULL) |
9291a0cd TT |
3393 | continue; |
3394 | ||
7b9f3c50 | 3395 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3396 | { |
7b9f3c50 | 3397 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3398 | const char *this_real_name; |
9291a0cd | 3399 | |
af529f8f | 3400 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3401 | { |
f5b95b50 | 3402 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3403 | callback, data)) |
3404 | return 1; | |
288e77a7 | 3405 | continue; |
4aac40c8 | 3406 | } |
9291a0cd | 3407 | |
c011a4f4 DE |
3408 | /* Before we invoke realpath, which can get expensive when many |
3409 | files are involved, do a quick comparison of the basenames. */ | |
3410 | if (! basenames_may_differ | |
3411 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3412 | continue; | |
3413 | ||
da235a7c JK |
3414 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3415 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3416 | { |
da235a7c JK |
3417 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3418 | callback, data)) | |
3419 | return 1; | |
288e77a7 | 3420 | continue; |
da235a7c | 3421 | } |
9291a0cd | 3422 | |
da235a7c JK |
3423 | if (real_path != NULL) |
3424 | { | |
af529f8f JK |
3425 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3426 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3427 | if (this_real_name != NULL |
af529f8f | 3428 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3429 | { |
f5b95b50 | 3430 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3431 | callback, data)) |
3432 | return 1; | |
288e77a7 | 3433 | continue; |
9291a0cd TT |
3434 | } |
3435 | } | |
3436 | } | |
3437 | } | |
3438 | ||
9291a0cd TT |
3439 | return 0; |
3440 | } | |
3441 | ||
da51c347 DE |
3442 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3443 | ||
3444 | struct dw2_symtab_iterator | |
9291a0cd | 3445 | { |
da51c347 DE |
3446 | /* The internalized form of .gdb_index. */ |
3447 | struct mapped_index *index; | |
3448 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3449 | int want_specific_block; | |
3450 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3451 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3452 | int block_index; | |
3453 | /* The kind of symbol we're looking for. */ | |
3454 | domain_enum domain; | |
3455 | /* The list of CUs from the index entry of the symbol, | |
3456 | or NULL if not found. */ | |
3457 | offset_type *vec; | |
3458 | /* The next element in VEC to look at. */ | |
3459 | int next; | |
3460 | /* The number of elements in VEC, or zero if there is no match. */ | |
3461 | int length; | |
8943b874 DE |
3462 | /* Have we seen a global version of the symbol? |
3463 | If so we can ignore all further global instances. | |
3464 | This is to work around gold/15646, inefficient gold-generated | |
3465 | indices. */ | |
3466 | int global_seen; | |
da51c347 | 3467 | }; |
9291a0cd | 3468 | |
da51c347 DE |
3469 | /* Initialize the index symtab iterator ITER. |
3470 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3471 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3472 | |
9291a0cd | 3473 | static void |
da51c347 DE |
3474 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3475 | struct mapped_index *index, | |
3476 | int want_specific_block, | |
3477 | int block_index, | |
3478 | domain_enum domain, | |
3479 | const char *name) | |
3480 | { | |
3481 | iter->index = index; | |
3482 | iter->want_specific_block = want_specific_block; | |
3483 | iter->block_index = block_index; | |
3484 | iter->domain = domain; | |
3485 | iter->next = 0; | |
8943b874 | 3486 | iter->global_seen = 0; |
da51c347 DE |
3487 | |
3488 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3489 | iter->length = MAYBE_SWAP (*iter->vec); | |
3490 | else | |
3491 | { | |
3492 | iter->vec = NULL; | |
3493 | iter->length = 0; | |
3494 | } | |
3495 | } | |
3496 | ||
3497 | /* Return the next matching CU or NULL if there are no more. */ | |
3498 | ||
3499 | static struct dwarf2_per_cu_data * | |
3500 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3501 | { | |
3502 | for ( ; iter->next < iter->length; ++iter->next) | |
3503 | { | |
3504 | offset_type cu_index_and_attrs = | |
3505 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3506 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3507 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3508 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3509 | /* This value is only valid for index versions >= 7. */ | |
3510 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3511 | gdb_index_symbol_kind symbol_kind = | |
3512 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3513 | /* Only check the symbol attributes if they're present. | |
3514 | Indices prior to version 7 don't record them, | |
3515 | and indices >= 7 may elide them for certain symbols | |
3516 | (gold does this). */ | |
3517 | int attrs_valid = | |
3518 | (iter->index->version >= 7 | |
3519 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3520 | ||
3190f0c6 DE |
3521 | /* Don't crash on bad data. */ |
3522 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3523 | + dwarf2_per_objfile->n_type_units)) | |
3524 | { | |
3525 | complaint (&symfile_complaints, | |
3526 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3527 | " [in module %s]"), |
3528 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3529 | continue; |
3530 | } | |
3531 | ||
8832e7e3 | 3532 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3533 | |
da51c347 DE |
3534 | /* Skip if already read in. */ |
3535 | if (per_cu->v.quick->symtab) | |
3536 | continue; | |
3537 | ||
8943b874 DE |
3538 | /* Check static vs global. */ |
3539 | if (attrs_valid) | |
3540 | { | |
3541 | if (iter->want_specific_block | |
3542 | && want_static != is_static) | |
3543 | continue; | |
3544 | /* Work around gold/15646. */ | |
3545 | if (!is_static && iter->global_seen) | |
3546 | continue; | |
3547 | if (!is_static) | |
3548 | iter->global_seen = 1; | |
3549 | } | |
da51c347 DE |
3550 | |
3551 | /* Only check the symbol's kind if it has one. */ | |
3552 | if (attrs_valid) | |
3553 | { | |
3554 | switch (iter->domain) | |
3555 | { | |
3556 | case VAR_DOMAIN: | |
3557 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3558 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3559 | /* Some types are also in VAR_DOMAIN. */ | |
3560 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3561 | continue; | |
3562 | break; | |
3563 | case STRUCT_DOMAIN: | |
3564 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3565 | continue; | |
3566 | break; | |
3567 | case LABEL_DOMAIN: | |
3568 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3569 | continue; | |
3570 | break; | |
3571 | default: | |
3572 | break; | |
3573 | } | |
3574 | } | |
3575 | ||
3576 | ++iter->next; | |
3577 | return per_cu; | |
3578 | } | |
3579 | ||
3580 | return NULL; | |
3581 | } | |
3582 | ||
3583 | static struct symtab * | |
3584 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3585 | const char *name, domain_enum domain) | |
9291a0cd | 3586 | { |
da51c347 | 3587 | struct symtab *stab_best = NULL; |
156942c7 DE |
3588 | struct mapped_index *index; |
3589 | ||
9291a0cd TT |
3590 | dw2_setup (objfile); |
3591 | ||
156942c7 DE |
3592 | index = dwarf2_per_objfile->index_table; |
3593 | ||
da51c347 | 3594 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3595 | if (index) |
9291a0cd | 3596 | { |
da51c347 DE |
3597 | struct dw2_symtab_iterator iter; |
3598 | struct dwarf2_per_cu_data *per_cu; | |
3599 | ||
3600 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3601 | |
da51c347 | 3602 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3603 | { |
da51c347 DE |
3604 | struct symbol *sym = NULL; |
3605 | struct symtab *stab = dw2_instantiate_symtab (per_cu); | |
3606 | ||
3607 | /* Some caution must be observed with overloaded functions | |
3608 | and methods, since the index will not contain any overload | |
3609 | information (but NAME might contain it). */ | |
3610 | if (stab->primary) | |
9291a0cd | 3611 | { |
da51c347 DE |
3612 | struct blockvector *bv = BLOCKVECTOR (stab); |
3613 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
156942c7 | 3614 | |
da51c347 DE |
3615 | sym = lookup_block_symbol (block, name, domain); |
3616 | } | |
1fd400ff | 3617 | |
da51c347 DE |
3618 | if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
3619 | { | |
3620 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) | |
3621 | return stab; | |
3622 | ||
3623 | stab_best = stab; | |
9291a0cd | 3624 | } |
da51c347 DE |
3625 | |
3626 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3627 | } |
3628 | } | |
9291a0cd | 3629 | |
da51c347 | 3630 | return stab_best; |
9291a0cd TT |
3631 | } |
3632 | ||
3633 | static void | |
3634 | dw2_print_stats (struct objfile *objfile) | |
3635 | { | |
e4a48d9d | 3636 | int i, total, count; |
9291a0cd TT |
3637 | |
3638 | dw2_setup (objfile); | |
e4a48d9d | 3639 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3640 | count = 0; |
e4a48d9d | 3641 | for (i = 0; i < total; ++i) |
9291a0cd | 3642 | { |
8832e7e3 | 3643 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3644 | |
e254ef6a | 3645 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3646 | ++count; |
3647 | } | |
e4a48d9d | 3648 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3649 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3650 | } | |
3651 | ||
779bd270 DE |
3652 | /* This dumps minimal information about the index. |
3653 | It is called via "mt print objfiles". | |
3654 | One use is to verify .gdb_index has been loaded by the | |
3655 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3656 | ||
9291a0cd TT |
3657 | static void |
3658 | dw2_dump (struct objfile *objfile) | |
3659 | { | |
779bd270 DE |
3660 | dw2_setup (objfile); |
3661 | gdb_assert (dwarf2_per_objfile->using_index); | |
3662 | printf_filtered (".gdb_index:"); | |
3663 | if (dwarf2_per_objfile->index_table != NULL) | |
3664 | { | |
3665 | printf_filtered (" version %d\n", | |
3666 | dwarf2_per_objfile->index_table->version); | |
3667 | } | |
3668 | else | |
3669 | printf_filtered (" faked for \"readnow\"\n"); | |
3670 | printf_filtered ("\n"); | |
9291a0cd TT |
3671 | } |
3672 | ||
3673 | static void | |
3189cb12 DE |
3674 | dw2_relocate (struct objfile *objfile, |
3675 | const struct section_offsets *new_offsets, | |
3676 | const struct section_offsets *delta) | |
9291a0cd TT |
3677 | { |
3678 | /* There's nothing to relocate here. */ | |
3679 | } | |
3680 | ||
3681 | static void | |
3682 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3683 | const char *func_name) | |
3684 | { | |
da51c347 DE |
3685 | struct mapped_index *index; |
3686 | ||
3687 | dw2_setup (objfile); | |
3688 | ||
3689 | index = dwarf2_per_objfile->index_table; | |
3690 | ||
3691 | /* index is NULL if OBJF_READNOW. */ | |
3692 | if (index) | |
3693 | { | |
3694 | struct dw2_symtab_iterator iter; | |
3695 | struct dwarf2_per_cu_data *per_cu; | |
3696 | ||
3697 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3698 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3699 | func_name); | |
3700 | ||
3701 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3702 | dw2_instantiate_symtab (per_cu); | |
3703 | } | |
9291a0cd TT |
3704 | } |
3705 | ||
3706 | static void | |
3707 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3708 | { | |
3709 | int i; | |
3710 | ||
3711 | dw2_setup (objfile); | |
1fd400ff TT |
3712 | |
3713 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3714 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3715 | { |
8832e7e3 | 3716 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3717 | |
a0f42c21 | 3718 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3719 | } |
3720 | } | |
3721 | ||
3722 | static void | |
652a8996 JK |
3723 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3724 | const char *fullname) | |
9291a0cd TT |
3725 | { |
3726 | int i; | |
3727 | ||
3728 | dw2_setup (objfile); | |
d4637a04 DE |
3729 | |
3730 | /* We don't need to consider type units here. | |
3731 | This is only called for examining code, e.g. expand_line_sal. | |
3732 | There can be an order of magnitude (or more) more type units | |
3733 | than comp units, and we avoid them if we can. */ | |
3734 | ||
3735 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3736 | { |
3737 | int j; | |
8832e7e3 | 3738 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 3739 | struct quick_file_names *file_data; |
9291a0cd | 3740 | |
3d7bb9d9 | 3741 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3742 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3743 | continue; |
3744 | ||
e4a48d9d | 3745 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3746 | if (file_data == NULL) |
9291a0cd TT |
3747 | continue; |
3748 | ||
7b9f3c50 | 3749 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3750 | { |
652a8996 JK |
3751 | const char *this_fullname = file_data->file_names[j]; |
3752 | ||
3753 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3754 | { |
a0f42c21 | 3755 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3756 | break; |
3757 | } | |
3758 | } | |
3759 | } | |
3760 | } | |
3761 | ||
9291a0cd | 3762 | static void |
ade7ed9e DE |
3763 | dw2_map_matching_symbols (struct objfile *objfile, |
3764 | const char * name, domain_enum namespace, | |
3765 | int global, | |
40658b94 PH |
3766 | int (*callback) (struct block *, |
3767 | struct symbol *, void *), | |
2edb89d3 JK |
3768 | void *data, symbol_compare_ftype *match, |
3769 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3770 | { |
40658b94 | 3771 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3772 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3773 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3774 | } |
3775 | ||
3776 | static void | |
f8eba3c6 TT |
3777 | dw2_expand_symtabs_matching |
3778 | (struct objfile *objfile, | |
206f2a57 DE |
3779 | expand_symtabs_file_matcher_ftype *file_matcher, |
3780 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, | |
f8eba3c6 TT |
3781 | enum search_domain kind, |
3782 | void *data) | |
9291a0cd TT |
3783 | { |
3784 | int i; | |
3785 | offset_type iter; | |
4b5246aa | 3786 | struct mapped_index *index; |
9291a0cd TT |
3787 | |
3788 | dw2_setup (objfile); | |
ae2de4f8 DE |
3789 | |
3790 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3791 | if (!dwarf2_per_objfile->index_table) |
3792 | return; | |
4b5246aa | 3793 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3794 | |
7b08b9eb | 3795 | if (file_matcher != NULL) |
24c79950 TT |
3796 | { |
3797 | struct cleanup *cleanup; | |
3798 | htab_t visited_found, visited_not_found; | |
3799 | ||
3800 | visited_found = htab_create_alloc (10, | |
3801 | htab_hash_pointer, htab_eq_pointer, | |
3802 | NULL, xcalloc, xfree); | |
3803 | cleanup = make_cleanup_htab_delete (visited_found); | |
3804 | visited_not_found = htab_create_alloc (10, | |
3805 | htab_hash_pointer, htab_eq_pointer, | |
3806 | NULL, xcalloc, xfree); | |
3807 | make_cleanup_htab_delete (visited_not_found); | |
3808 | ||
848e3e78 DE |
3809 | /* The rule is CUs specify all the files, including those used by |
3810 | any TU, so there's no need to scan TUs here. */ | |
3811 | ||
3812 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3813 | { |
3814 | int j; | |
8832e7e3 | 3815 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
3816 | struct quick_file_names *file_data; |
3817 | void **slot; | |
7b08b9eb | 3818 | |
24c79950 | 3819 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3820 | |
24c79950 TT |
3821 | /* We only need to look at symtabs not already expanded. */ |
3822 | if (per_cu->v.quick->symtab) | |
3823 | continue; | |
7b08b9eb | 3824 | |
e4a48d9d | 3825 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3826 | if (file_data == NULL) |
3827 | continue; | |
7b08b9eb | 3828 | |
24c79950 TT |
3829 | if (htab_find (visited_not_found, file_data) != NULL) |
3830 | continue; | |
3831 | else if (htab_find (visited_found, file_data) != NULL) | |
3832 | { | |
3833 | per_cu->v.quick->mark = 1; | |
3834 | continue; | |
3835 | } | |
3836 | ||
3837 | for (j = 0; j < file_data->num_file_names; ++j) | |
3838 | { | |
da235a7c JK |
3839 | const char *this_real_name; |
3840 | ||
fbd9ab74 | 3841 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3842 | { |
3843 | per_cu->v.quick->mark = 1; | |
3844 | break; | |
3845 | } | |
da235a7c JK |
3846 | |
3847 | /* Before we invoke realpath, which can get expensive when many | |
3848 | files are involved, do a quick comparison of the basenames. */ | |
3849 | if (!basenames_may_differ | |
3850 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3851 | data, 1)) | |
3852 | continue; | |
3853 | ||
3854 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3855 | if (file_matcher (this_real_name, data, 0)) | |
3856 | { | |
3857 | per_cu->v.quick->mark = 1; | |
3858 | break; | |
3859 | } | |
24c79950 TT |
3860 | } |
3861 | ||
3862 | slot = htab_find_slot (per_cu->v.quick->mark | |
3863 | ? visited_found | |
3864 | : visited_not_found, | |
3865 | file_data, INSERT); | |
3866 | *slot = file_data; | |
3867 | } | |
3868 | ||
3869 | do_cleanups (cleanup); | |
3870 | } | |
9291a0cd | 3871 | |
3876f04e | 3872 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3873 | { |
3874 | offset_type idx = 2 * iter; | |
3875 | const char *name; | |
3876 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 3877 | int global_seen = 0; |
9291a0cd | 3878 | |
3876f04e | 3879 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3880 | continue; |
3881 | ||
3876f04e | 3882 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3883 | |
206f2a57 | 3884 | if (! (*symbol_matcher) (name, data)) |
9291a0cd TT |
3885 | continue; |
3886 | ||
3887 | /* The name was matched, now expand corresponding CUs that were | |
3888 | marked. */ | |
4b5246aa | 3889 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3890 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3891 | vec_len = MAYBE_SWAP (vec[0]); |
3892 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3893 | { | |
e254ef6a | 3894 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 3895 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
3896 | /* This value is only valid for index versions >= 7. */ |
3897 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
3898 | gdb_index_symbol_kind symbol_kind = |
3899 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3900 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
3901 | /* Only check the symbol attributes if they're present. |
3902 | Indices prior to version 7 don't record them, | |
3903 | and indices >= 7 may elide them for certain symbols | |
3904 | (gold does this). */ | |
3905 | int attrs_valid = | |
3906 | (index->version >= 7 | |
3907 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3908 | ||
8943b874 DE |
3909 | /* Work around gold/15646. */ |
3910 | if (attrs_valid) | |
3911 | { | |
3912 | if (!is_static && global_seen) | |
3913 | continue; | |
3914 | if (!is_static) | |
3915 | global_seen = 1; | |
3916 | } | |
3917 | ||
3190f0c6 DE |
3918 | /* Only check the symbol's kind if it has one. */ |
3919 | if (attrs_valid) | |
156942c7 DE |
3920 | { |
3921 | switch (kind) | |
3922 | { | |
3923 | case VARIABLES_DOMAIN: | |
3924 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3925 | continue; | |
3926 | break; | |
3927 | case FUNCTIONS_DOMAIN: | |
3928 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3929 | continue; | |
3930 | break; | |
3931 | case TYPES_DOMAIN: | |
3932 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3933 | continue; | |
3934 | break; | |
3935 | default: | |
3936 | break; | |
3937 | } | |
3938 | } | |
3939 | ||
3190f0c6 DE |
3940 | /* Don't crash on bad data. */ |
3941 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3942 | + dwarf2_per_objfile->n_type_units)) | |
3943 | { | |
3944 | complaint (&symfile_complaints, | |
3945 | _(".gdb_index entry has bad CU index" | |
4262abfb | 3946 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
3947 | continue; |
3948 | } | |
3949 | ||
8832e7e3 | 3950 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 3951 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3952 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3953 | } |
3954 | } | |
3955 | } | |
3956 | ||
9703b513 TT |
3957 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3958 | symtab. */ | |
3959 | ||
3960 | static struct symtab * | |
3961 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3962 | { | |
3963 | int i; | |
3964 | ||
3965 | if (BLOCKVECTOR (symtab) != NULL | |
3966 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3967 | return symtab; | |
3968 | ||
a3ec0bb1 DE |
3969 | if (symtab->includes == NULL) |
3970 | return NULL; | |
3971 | ||
9703b513 TT |
3972 | for (i = 0; symtab->includes[i]; ++i) |
3973 | { | |
a3ec0bb1 | 3974 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3975 | |
3976 | s = recursively_find_pc_sect_symtab (s, pc); | |
3977 | if (s != NULL) | |
3978 | return s; | |
3979 | } | |
3980 | ||
3981 | return NULL; | |
3982 | } | |
3983 | ||
9291a0cd TT |
3984 | static struct symtab * |
3985 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
77e371c0 | 3986 | struct bound_minimal_symbol msymbol, |
9291a0cd TT |
3987 | CORE_ADDR pc, |
3988 | struct obj_section *section, | |
3989 | int warn_if_readin) | |
3990 | { | |
3991 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3992 | struct symtab *result; |
9291a0cd TT |
3993 | |
3994 | dw2_setup (objfile); | |
3995 | ||
3996 | if (!objfile->psymtabs_addrmap) | |
3997 | return NULL; | |
3998 | ||
3999 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
4000 | if (!data) | |
4001 | return NULL; | |
4002 | ||
4003 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 4004 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4005 | paddress (get_objfile_arch (objfile), pc)); |
4006 | ||
9703b513 TT |
4007 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
4008 | gdb_assert (result != NULL); | |
4009 | return result; | |
9291a0cd TT |
4010 | } |
4011 | ||
9291a0cd | 4012 | static void |
44b13c5a | 4013 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4014 | void *data, int need_fullname) |
9291a0cd TT |
4015 | { |
4016 | int i; | |
24c79950 TT |
4017 | struct cleanup *cleanup; |
4018 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
4019 | NULL, xcalloc, xfree); | |
9291a0cd | 4020 | |
24c79950 | 4021 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 4022 | dw2_setup (objfile); |
ae2de4f8 | 4023 | |
848e3e78 DE |
4024 | /* The rule is CUs specify all the files, including those used by |
4025 | any TU, so there's no need to scan TUs here. | |
4026 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 4027 | |
848e3e78 | 4028 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 | 4029 | { |
8832e7e3 | 4030 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
24c79950 TT |
4031 | |
4032 | if (per_cu->v.quick->symtab) | |
4033 | { | |
4034 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
4035 | INSERT); | |
4036 | ||
4037 | *slot = per_cu->v.quick->file_names; | |
4038 | } | |
4039 | } | |
4040 | ||
848e3e78 | 4041 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
4042 | { |
4043 | int j; | |
8832e7e3 | 4044 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 4045 | struct quick_file_names *file_data; |
24c79950 | 4046 | void **slot; |
9291a0cd | 4047 | |
3d7bb9d9 | 4048 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 4049 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
4050 | continue; |
4051 | ||
e4a48d9d | 4052 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4053 | if (file_data == NULL) |
9291a0cd TT |
4054 | continue; |
4055 | ||
24c79950 TT |
4056 | slot = htab_find_slot (visited, file_data, INSERT); |
4057 | if (*slot) | |
4058 | { | |
4059 | /* Already visited. */ | |
4060 | continue; | |
4061 | } | |
4062 | *slot = file_data; | |
4063 | ||
7b9f3c50 | 4064 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4065 | { |
74e2f255 DE |
4066 | const char *this_real_name; |
4067 | ||
4068 | if (need_fullname) | |
4069 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4070 | else | |
4071 | this_real_name = NULL; | |
7b9f3c50 | 4072 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
4073 | } |
4074 | } | |
24c79950 TT |
4075 | |
4076 | do_cleanups (cleanup); | |
9291a0cd TT |
4077 | } |
4078 | ||
4079 | static int | |
4080 | dw2_has_symbols (struct objfile *objfile) | |
4081 | { | |
4082 | return 1; | |
4083 | } | |
4084 | ||
4085 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4086 | { | |
4087 | dw2_has_symbols, | |
4088 | dw2_find_last_source_symtab, | |
4089 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4090 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4091 | dw2_lookup_symbol, |
9291a0cd TT |
4092 | dw2_print_stats, |
4093 | dw2_dump, | |
4094 | dw2_relocate, | |
4095 | dw2_expand_symtabs_for_function, | |
4096 | dw2_expand_all_symtabs, | |
652a8996 | 4097 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4098 | dw2_map_matching_symbols, |
9291a0cd TT |
4099 | dw2_expand_symtabs_matching, |
4100 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
4101 | dw2_map_symbol_filenames |
4102 | }; | |
4103 | ||
4104 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4105 | file will use psymtabs, or 1 if using the GNU index. */ | |
4106 | ||
4107 | int | |
4108 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4109 | { | |
4110 | /* If we're about to read full symbols, don't bother with the | |
4111 | indices. In this case we also don't care if some other debug | |
4112 | format is making psymtabs, because they are all about to be | |
4113 | expanded anyway. */ | |
4114 | if ((objfile->flags & OBJF_READNOW)) | |
4115 | { | |
4116 | int i; | |
4117 | ||
4118 | dwarf2_per_objfile->using_index = 1; | |
4119 | create_all_comp_units (objfile); | |
0e50663e | 4120 | create_all_type_units (objfile); |
7b9f3c50 DE |
4121 | dwarf2_per_objfile->quick_file_names_table = |
4122 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4123 | |
1fd400ff | 4124 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4125 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4126 | { |
8832e7e3 | 4127 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4128 | |
e254ef6a DE |
4129 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4130 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4131 | } |
4132 | ||
4133 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4134 | these functions will be no-ops because we will have expanded | |
4135 | all symtabs. */ | |
4136 | return 1; | |
4137 | } | |
4138 | ||
4139 | if (dwarf2_read_index (objfile)) | |
4140 | return 1; | |
4141 | ||
9291a0cd TT |
4142 | return 0; |
4143 | } | |
4144 | ||
4145 | \f | |
4146 | ||
dce234bc PP |
4147 | /* Build a partial symbol table. */ |
4148 | ||
4149 | void | |
f29dff0a | 4150 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4151 | { |
c9bf0622 TT |
4152 | volatile struct gdb_exception except; |
4153 | ||
f29dff0a | 4154 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4155 | { |
4156 | init_psymbol_list (objfile, 1024); | |
4157 | } | |
4158 | ||
c9bf0622 TT |
4159 | TRY_CATCH (except, RETURN_MASK_ERROR) |
4160 | { | |
4161 | /* This isn't really ideal: all the data we allocate on the | |
4162 | objfile's obstack is still uselessly kept around. However, | |
4163 | freeing it seems unsafe. */ | |
4164 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
4165 | ||
4166 | dwarf2_build_psymtabs_hard (objfile); | |
4167 | discard_cleanups (cleanups); | |
4168 | } | |
4169 | if (except.reason < 0) | |
4170 | exception_print (gdb_stderr, except); | |
c906108c | 4171 | } |
c906108c | 4172 | |
1ce1cefd DE |
4173 | /* Return the total length of the CU described by HEADER. */ |
4174 | ||
4175 | static unsigned int | |
4176 | get_cu_length (const struct comp_unit_head *header) | |
4177 | { | |
4178 | return header->initial_length_size + header->length; | |
4179 | } | |
4180 | ||
45452591 DE |
4181 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
4182 | ||
4183 | static inline int | |
b64f50a1 | 4184 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 4185 | { |
b64f50a1 | 4186 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 4187 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 4188 | |
b64f50a1 | 4189 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
4190 | } |
4191 | ||
3b80fe9b DE |
4192 | /* Find the base address of the compilation unit for range lists and |
4193 | location lists. It will normally be specified by DW_AT_low_pc. | |
4194 | In DWARF-3 draft 4, the base address could be overridden by | |
4195 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4196 | compilation units with discontinuous ranges. */ | |
4197 | ||
4198 | static void | |
4199 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4200 | { | |
4201 | struct attribute *attr; | |
4202 | ||
4203 | cu->base_known = 0; | |
4204 | cu->base_address = 0; | |
4205 | ||
4206 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4207 | if (attr) | |
4208 | { | |
31aa7e4e | 4209 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4210 | cu->base_known = 1; |
4211 | } | |
4212 | else | |
4213 | { | |
4214 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4215 | if (attr) | |
4216 | { | |
31aa7e4e | 4217 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4218 | cu->base_known = 1; |
4219 | } | |
4220 | } | |
4221 | } | |
4222 | ||
93311388 DE |
4223 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4224 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4225 | by the caller. */ | |
107d2387 | 4226 | |
d521ce57 | 4227 | static const gdb_byte * |
107d2387 | 4228 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4229 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4230 | { |
4231 | int signed_addr; | |
891d2f0b | 4232 | unsigned int bytes_read; |
c764a876 DE |
4233 | |
4234 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4235 | cu_header->initial_length_size = bytes_read; | |
4236 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4237 | info_ptr += bytes_read; |
107d2387 AC |
4238 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4239 | info_ptr += 2; | |
b64f50a1 JK |
4240 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4241 | &bytes_read); | |
613e1657 | 4242 | info_ptr += bytes_read; |
107d2387 AC |
4243 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4244 | info_ptr += 1; | |
4245 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4246 | if (signed_addr < 0) | |
8e65ff28 | 4247 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4248 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4249 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4250 | |
107d2387 AC |
4251 | return info_ptr; |
4252 | } | |
4253 | ||
36586728 TT |
4254 | /* Helper function that returns the proper abbrev section for |
4255 | THIS_CU. */ | |
4256 | ||
4257 | static struct dwarf2_section_info * | |
4258 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4259 | { | |
4260 | struct dwarf2_section_info *abbrev; | |
4261 | ||
4262 | if (this_cu->is_dwz) | |
4263 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4264 | else | |
4265 | abbrev = &dwarf2_per_objfile->abbrev; | |
4266 | ||
4267 | return abbrev; | |
4268 | } | |
4269 | ||
9ff913ba DE |
4270 | /* Subroutine of read_and_check_comp_unit_head and |
4271 | read_and_check_type_unit_head to simplify them. | |
4272 | Perform various error checking on the header. */ | |
4273 | ||
4274 | static void | |
4275 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4276 | struct dwarf2_section_info *section, |
4277 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4278 | { |
a32a8923 DE |
4279 | bfd *abfd = get_section_bfd_owner (section); |
4280 | const char *filename = get_section_file_name (section); | |
9ff913ba DE |
4281 | |
4282 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4283 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4284 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4285 | filename); | |
4286 | ||
b64f50a1 | 4287 | if (header->abbrev_offset.sect_off |
36586728 | 4288 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4289 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4290 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4291 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4292 | filename); |
4293 | ||
4294 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4295 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4296 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4297 | > section->size) |
4298 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4299 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4300 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4301 | filename); |
4302 | } | |
4303 | ||
4304 | /* Read in a CU/TU header and perform some basic error checking. | |
4305 | The contents of the header are stored in HEADER. | |
4306 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4307 | |
d521ce57 | 4308 | static const gdb_byte * |
9ff913ba DE |
4309 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4310 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4311 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4312 | const gdb_byte *info_ptr, |
9ff913ba | 4313 | int is_debug_types_section) |
72bf9492 | 4314 | { |
d521ce57 | 4315 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4316 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4317 | |
b64f50a1 | 4318 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4319 | |
72bf9492 DJ |
4320 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4321 | ||
460c1c54 CC |
4322 | /* If we're reading a type unit, skip over the signature and |
4323 | type_offset fields. */ | |
b0df02fd | 4324 | if (is_debug_types_section) |
460c1c54 CC |
4325 | info_ptr += 8 /*signature*/ + header->offset_size; |
4326 | ||
b64f50a1 | 4327 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4328 | |
4bdcc0c1 | 4329 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4330 | |
4331 | return info_ptr; | |
4332 | } | |
4333 | ||
348e048f DE |
4334 | /* Read in the types comp unit header information from .debug_types entry at |
4335 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4336 | ||
d521ce57 | 4337 | static const gdb_byte * |
9ff913ba DE |
4338 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4339 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4340 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4341 | const gdb_byte *info_ptr, |
dee91e82 DE |
4342 | ULONGEST *signature, |
4343 | cu_offset *type_offset_in_tu) | |
348e048f | 4344 | { |
d521ce57 | 4345 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4346 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4347 | |
b64f50a1 | 4348 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4349 | |
9ff913ba | 4350 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4351 | |
9ff913ba DE |
4352 | /* If we're reading a type unit, skip over the signature and |
4353 | type_offset fields. */ | |
4354 | if (signature != NULL) | |
4355 | *signature = read_8_bytes (abfd, info_ptr); | |
4356 | info_ptr += 8; | |
dee91e82 DE |
4357 | if (type_offset_in_tu != NULL) |
4358 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4359 | header->offset_size); | |
9ff913ba DE |
4360 | info_ptr += header->offset_size; |
4361 | ||
b64f50a1 | 4362 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4363 | |
4bdcc0c1 | 4364 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4365 | |
4366 | return info_ptr; | |
348e048f DE |
4367 | } |
4368 | ||
f4dc4d17 DE |
4369 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4370 | ||
4371 | static sect_offset | |
4372 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4373 | sect_offset offset) | |
4374 | { | |
a32a8923 | 4375 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4376 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4377 | unsigned int length, initial_length_size, offset_size; |
4378 | sect_offset abbrev_offset; | |
4379 | ||
4380 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4381 | info_ptr = section->buffer + offset.sect_off; | |
4382 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4383 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4384 | info_ptr += initial_length_size + 2 /*version*/; | |
4385 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4386 | return abbrev_offset; | |
4387 | } | |
4388 | ||
aaa75496 JB |
4389 | /* Allocate a new partial symtab for file named NAME and mark this new |
4390 | partial symtab as being an include of PST. */ | |
4391 | ||
4392 | static void | |
d521ce57 | 4393 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4394 | struct objfile *objfile) |
4395 | { | |
4396 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4397 | ||
fbd9ab74 JK |
4398 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4399 | { | |
4400 | /* It shares objfile->objfile_obstack. */ | |
4401 | subpst->dirname = pst->dirname; | |
4402 | } | |
4403 | ||
aaa75496 JB |
4404 | subpst->section_offsets = pst->section_offsets; |
4405 | subpst->textlow = 0; | |
4406 | subpst->texthigh = 0; | |
4407 | ||
4408 | subpst->dependencies = (struct partial_symtab **) | |
4409 | obstack_alloc (&objfile->objfile_obstack, | |
4410 | sizeof (struct partial_symtab *)); | |
4411 | subpst->dependencies[0] = pst; | |
4412 | subpst->number_of_dependencies = 1; | |
4413 | ||
4414 | subpst->globals_offset = 0; | |
4415 | subpst->n_global_syms = 0; | |
4416 | subpst->statics_offset = 0; | |
4417 | subpst->n_static_syms = 0; | |
4418 | subpst->symtab = NULL; | |
4419 | subpst->read_symtab = pst->read_symtab; | |
4420 | subpst->readin = 0; | |
4421 | ||
4422 | /* No private part is necessary for include psymtabs. This property | |
4423 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4424 | the regular ones. */ |
58a9656e | 4425 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4426 | } |
4427 | ||
4428 | /* Read the Line Number Program data and extract the list of files | |
4429 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4430 | partial symtab for each of these included files. */ |
aaa75496 JB |
4431 | |
4432 | static void | |
4433 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4434 | struct die_info *die, |
4435 | struct partial_symtab *pst) | |
aaa75496 | 4436 | { |
d85a05f0 DJ |
4437 | struct line_header *lh = NULL; |
4438 | struct attribute *attr; | |
aaa75496 | 4439 | |
d85a05f0 DJ |
4440 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4441 | if (attr) | |
3019eac3 | 4442 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4443 | if (lh == NULL) |
4444 | return; /* No linetable, so no includes. */ | |
4445 | ||
c6da4cef | 4446 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4447 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4448 | |
4449 | free_line_header (lh); | |
4450 | } | |
4451 | ||
348e048f | 4452 | static hashval_t |
52dc124a | 4453 | hash_signatured_type (const void *item) |
348e048f | 4454 | { |
52dc124a | 4455 | const struct signatured_type *sig_type = item; |
9a619af0 | 4456 | |
348e048f | 4457 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4458 | return sig_type->signature; |
348e048f DE |
4459 | } |
4460 | ||
4461 | static int | |
52dc124a | 4462 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4463 | { |
4464 | const struct signatured_type *lhs = item_lhs; | |
4465 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4466 | |
348e048f DE |
4467 | return lhs->signature == rhs->signature; |
4468 | } | |
4469 | ||
1fd400ff TT |
4470 | /* Allocate a hash table for signatured types. */ |
4471 | ||
4472 | static htab_t | |
673bfd45 | 4473 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4474 | { |
4475 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4476 | hash_signatured_type, |
4477 | eq_signatured_type, | |
1fd400ff TT |
4478 | NULL, |
4479 | &objfile->objfile_obstack, | |
4480 | hashtab_obstack_allocate, | |
4481 | dummy_obstack_deallocate); | |
4482 | } | |
4483 | ||
d467dd73 | 4484 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4485 | |
4486 | static int | |
d467dd73 | 4487 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4488 | { |
4489 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4490 | struct signatured_type ***datap = datum; |
1fd400ff | 4491 | |
b4dd5633 | 4492 | **datap = sigt; |
1fd400ff TT |
4493 | ++*datap; |
4494 | ||
4495 | return 1; | |
4496 | } | |
4497 | ||
c88ee1f0 DE |
4498 | /* Create the hash table of all entries in the .debug_types |
4499 | (or .debug_types.dwo) section(s). | |
4500 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4501 | otherwise it is NULL. | |
4502 | ||
4503 | The result is a pointer to the hash table or NULL if there are no types. | |
4504 | ||
4505 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4506 | |
3019eac3 DE |
4507 | static htab_t |
4508 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4509 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4510 | { |
3019eac3 | 4511 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4512 | htab_t types_htab = NULL; |
8b70b953 TT |
4513 | int ix; |
4514 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4515 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4516 | |
3019eac3 DE |
4517 | if (VEC_empty (dwarf2_section_info_def, types)) |
4518 | return NULL; | |
348e048f | 4519 | |
4bdcc0c1 DE |
4520 | abbrev_section = (dwo_file != NULL |
4521 | ? &dwo_file->sections.abbrev | |
4522 | : &dwarf2_per_objfile->abbrev); | |
4523 | ||
09406207 DE |
4524 | if (dwarf2_read_debug) |
4525 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4526 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4527 | get_section_file_name (abbrev_section)); |
09406207 | 4528 | |
8b70b953 | 4529 | for (ix = 0; |
3019eac3 | 4530 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4531 | ++ix) |
4532 | { | |
3019eac3 | 4533 | bfd *abfd; |
d521ce57 | 4534 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4535 | |
8b70b953 TT |
4536 | dwarf2_read_section (objfile, section); |
4537 | info_ptr = section->buffer; | |
348e048f | 4538 | |
8b70b953 TT |
4539 | if (info_ptr == NULL) |
4540 | continue; | |
348e048f | 4541 | |
3019eac3 | 4542 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4543 | not present, in which case the bfd is unknown. */ |
4544 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4545 | |
dee91e82 DE |
4546 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4547 | because we don't need to read any dies: the signature is in the | |
4548 | header. */ | |
8b70b953 TT |
4549 | |
4550 | end_ptr = info_ptr + section->size; | |
4551 | while (info_ptr < end_ptr) | |
4552 | { | |
b64f50a1 | 4553 | sect_offset offset; |
3019eac3 | 4554 | cu_offset type_offset_in_tu; |
8b70b953 | 4555 | ULONGEST signature; |
52dc124a | 4556 | struct signatured_type *sig_type; |
3019eac3 | 4557 | struct dwo_unit *dwo_tu; |
8b70b953 | 4558 | void **slot; |
d521ce57 | 4559 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4560 | struct comp_unit_head header; |
dee91e82 | 4561 | unsigned int length; |
348e048f | 4562 | |
b64f50a1 | 4563 | offset.sect_off = ptr - section->buffer; |
348e048f | 4564 | |
8b70b953 | 4565 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4566 | table, but we don't need anything else just yet. */ |
348e048f | 4567 | |
4bdcc0c1 DE |
4568 | ptr = read_and_check_type_unit_head (&header, section, |
4569 | abbrev_section, ptr, | |
3019eac3 | 4570 | &signature, &type_offset_in_tu); |
6caca83c | 4571 | |
1ce1cefd | 4572 | length = get_cu_length (&header); |
dee91e82 | 4573 | |
6caca83c | 4574 | /* Skip dummy type units. */ |
dee91e82 DE |
4575 | if (ptr >= info_ptr + length |
4576 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4577 | { |
1ce1cefd | 4578 | info_ptr += length; |
6caca83c CC |
4579 | continue; |
4580 | } | |
8b70b953 | 4581 | |
0349ea22 DE |
4582 | if (types_htab == NULL) |
4583 | { | |
4584 | if (dwo_file) | |
4585 | types_htab = allocate_dwo_unit_table (objfile); | |
4586 | else | |
4587 | types_htab = allocate_signatured_type_table (objfile); | |
4588 | } | |
4589 | ||
3019eac3 DE |
4590 | if (dwo_file) |
4591 | { | |
4592 | sig_type = NULL; | |
4593 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4594 | struct dwo_unit); | |
4595 | dwo_tu->dwo_file = dwo_file; | |
4596 | dwo_tu->signature = signature; | |
4597 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4598 | dwo_tu->section = section; |
3019eac3 DE |
4599 | dwo_tu->offset = offset; |
4600 | dwo_tu->length = length; | |
4601 | } | |
4602 | else | |
4603 | { | |
4604 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4605 | The real type_offset is in the DWO file. */ | |
4606 | dwo_tu = NULL; | |
4607 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4608 | struct signatured_type); | |
4609 | sig_type->signature = signature; | |
4610 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4611 | sig_type->per_cu.objfile = objfile; | |
4612 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4613 | sig_type->per_cu.section = section; |
3019eac3 DE |
4614 | sig_type->per_cu.offset = offset; |
4615 | sig_type->per_cu.length = length; | |
4616 | } | |
8b70b953 | 4617 | |
3019eac3 DE |
4618 | slot = htab_find_slot (types_htab, |
4619 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4620 | INSERT); | |
8b70b953 TT |
4621 | gdb_assert (slot != NULL); |
4622 | if (*slot != NULL) | |
4623 | { | |
3019eac3 DE |
4624 | sect_offset dup_offset; |
4625 | ||
4626 | if (dwo_file) | |
4627 | { | |
4628 | const struct dwo_unit *dup_tu = *slot; | |
4629 | ||
4630 | dup_offset = dup_tu->offset; | |
4631 | } | |
4632 | else | |
4633 | { | |
4634 | const struct signatured_type *dup_tu = *slot; | |
4635 | ||
4636 | dup_offset = dup_tu->per_cu.offset; | |
4637 | } | |
b3c8eb43 | 4638 | |
8b70b953 | 4639 | complaint (&symfile_complaints, |
c88ee1f0 | 4640 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4641 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4642 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4643 | hex_string (signature)); |
8b70b953 | 4644 | } |
3019eac3 | 4645 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4646 | |
73be47f5 | 4647 | if (dwarf2_read_debug > 1) |
4031ecc5 | 4648 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4649 | offset.sect_off, |
4031ecc5 | 4650 | hex_string (signature)); |
348e048f | 4651 | |
dee91e82 | 4652 | info_ptr += length; |
8b70b953 | 4653 | } |
348e048f DE |
4654 | } |
4655 | ||
3019eac3 DE |
4656 | return types_htab; |
4657 | } | |
4658 | ||
4659 | /* Create the hash table of all entries in the .debug_types section, | |
4660 | and initialize all_type_units. | |
4661 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4662 | otherwise non-zero. */ | |
4663 | ||
4664 | static int | |
4665 | create_all_type_units (struct objfile *objfile) | |
4666 | { | |
4667 | htab_t types_htab; | |
b4dd5633 | 4668 | struct signatured_type **iter; |
3019eac3 DE |
4669 | |
4670 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4671 | if (types_htab == NULL) | |
4672 | { | |
4673 | dwarf2_per_objfile->signatured_types = NULL; | |
4674 | return 0; | |
4675 | } | |
4676 | ||
348e048f DE |
4677 | dwarf2_per_objfile->signatured_types = types_htab; |
4678 | ||
d467dd73 DE |
4679 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4680 | dwarf2_per_objfile->all_type_units | |
a2ce51a0 DE |
4681 | = xmalloc (dwarf2_per_objfile->n_type_units |
4682 | * sizeof (struct signatured_type *)); | |
d467dd73 DE |
4683 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4684 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4685 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4686 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4687 | |
348e048f DE |
4688 | return 1; |
4689 | } | |
4690 | ||
a2ce51a0 DE |
4691 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4692 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4693 | ||
4694 | static void | |
4695 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4696 | struct signatured_type *sig_entry, | |
4697 | struct dwo_unit *dwo_entry) | |
4698 | { | |
7ee85ab1 | 4699 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4700 | gdb_assert (! sig_entry->per_cu.queued); |
4701 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
4702 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
4703 | gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL); | |
4704 | gdb_assert (sig_entry->signature == dwo_entry->signature); | |
4705 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4706 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4707 | gdb_assert (sig_entry->dwo_unit == NULL); |
4708 | ||
4709 | sig_entry->per_cu.section = dwo_entry->section; | |
4710 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4711 | sig_entry->per_cu.length = dwo_entry->length; | |
4712 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4713 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4714 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4715 | sig_entry->dwo_unit = dwo_entry; | |
4716 | } | |
4717 | ||
4718 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4719 | If we haven't read the TU yet, create the signatured_type data structure |
4720 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4721 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4722 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4723 | containing that CU. Otherwise we could end up reading several other DWO | |
4724 | files (due to comdat folding) to process the transitive closure of all the | |
4725 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4726 | type signature that it needs. | |
a2ce51a0 DE |
4727 | We only do this for .gdb_index because in the psymtab case we already have |
4728 | to read all the DWOs to build the type unit groups. */ | |
4729 | ||
4730 | static struct signatured_type * | |
4731 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4732 | { | |
4733 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4734 | struct dwo_file *dwo_file; | |
4735 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4736 | struct signatured_type find_sig_entry, *sig_entry; | |
4737 | ||
4738 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4739 | ||
4740 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the | |
4741 | dwo_unit of the TU itself. */ | |
4742 | dwo_file = cu->dwo_unit->dwo_file; | |
4743 | ||
4744 | /* We only ever need to read in one copy of a signatured type. | |
4745 | Just use the global signatured_types array. If this is the first time | |
4746 | we're reading this type, replace the recorded data from .gdb_index with | |
4747 | this TU. */ | |
4748 | ||
4749 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4750 | return NULL; | |
4751 | find_sig_entry.signature = sig; | |
4752 | sig_entry = htab_find (dwarf2_per_objfile->signatured_types, &find_sig_entry); | |
4753 | if (sig_entry == NULL) | |
4754 | return NULL; | |
7ee85ab1 DE |
4755 | |
4756 | /* We can get here with the TU already read, *or* in the process of being | |
4757 | read. Don't reassign it if that's the case. Also note that if the TU is | |
4758 | already being read, it may not have come from a DWO, the program may be | |
4759 | a mix of Fission-compiled code and non-Fission-compiled code. */ | |
a2ce51a0 | 4760 | /* Have we already tried to read this TU? */ |
7ee85ab1 | 4761 | if (sig_entry->per_cu.tu_read) |
a2ce51a0 DE |
4762 | return sig_entry; |
4763 | ||
4764 | /* Ok, this is the first time we're reading this TU. */ | |
4765 | if (dwo_file->tus == NULL) | |
4766 | return NULL; | |
4767 | find_dwo_entry.signature = sig; | |
4768 | dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry); | |
4769 | if (dwo_entry == NULL) | |
4770 | return NULL; | |
4771 | ||
4772 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); | |
89e63ee4 | 4773 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4774 | return sig_entry; |
4775 | } | |
4776 | ||
4777 | /* Subroutine of lookup_dwp_signatured_type. | |
4778 | Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */ | |
4779 | ||
4780 | static struct signatured_type * | |
4781 | add_type_unit (ULONGEST sig) | |
4782 | { | |
4783 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4784 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4785 | struct signatured_type *sig_type; | |
4786 | void **slot; | |
4787 | ||
4788 | ++n_type_units; | |
4789 | dwarf2_per_objfile->all_type_units = | |
4790 | xrealloc (dwarf2_per_objfile->all_type_units, | |
4791 | n_type_units * sizeof (struct signatured_type *)); | |
4792 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4793 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4794 | struct signatured_type); | |
4795 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4796 | sig_type->signature = sig; | |
4797 | sig_type->per_cu.is_debug_types = 1; | |
4798 | sig_type->per_cu.v.quick = | |
4799 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4800 | struct dwarf2_per_cu_quick_data); | |
4801 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4802 | sig_type, INSERT); | |
4803 | gdb_assert (*slot == NULL); | |
4804 | *slot = sig_type; | |
4805 | /* The rest of sig_type must be filled in by the caller. */ | |
4806 | return sig_type; | |
4807 | } | |
4808 | ||
4809 | /* Subroutine of lookup_signatured_type. | |
4810 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
4811 | then try the DWP file. | |
4812 | Normally this "can't happen", but if there's a bug in signature | |
4813 | generation and/or the DWP file is built incorrectly, it can happen. | |
4814 | Using the type directly from the DWP file means we don't have the stub | |
4815 | which has some useful attributes (e.g., DW_AT_comp_dir), but they're | |
4816 | not critical. [Eventually the stub may go away for type units anyway.] */ | |
4817 | ||
4818 | static struct signatured_type * | |
4819 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4820 | { | |
4821 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4822 | struct dwp_file *dwp_file = get_dwp_file (); | |
4823 | struct dwo_unit *dwo_entry; | |
4824 | struct signatured_type find_sig_entry, *sig_entry; | |
4825 | ||
4826 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4827 | gdb_assert (dwp_file != NULL); | |
4828 | ||
4829 | if (dwarf2_per_objfile->signatured_types != NULL) | |
4830 | { | |
4831 | find_sig_entry.signature = sig; | |
4832 | sig_entry = htab_find (dwarf2_per_objfile->signatured_types, | |
4833 | &find_sig_entry); | |
4834 | if (sig_entry != NULL) | |
4835 | return sig_entry; | |
4836 | } | |
4837 | ||
4838 | /* This is the "shouldn't happen" case. | |
4839 | Try the DWP file and hope for the best. */ | |
4840 | if (dwp_file->tus == NULL) | |
4841 | return NULL; | |
57d63ce2 DE |
4842 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
4843 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
4844 | if (dwo_entry == NULL) |
4845 | return NULL; | |
4846 | ||
4847 | sig_entry = add_type_unit (sig); | |
4848 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); | |
4849 | ||
4850 | /* The caller will signal a complaint if we return NULL. | |
4851 | Here we don't return NULL but we still want to complain. */ | |
4852 | complaint (&symfile_complaints, | |
4853 | _("Bad type signature %s referenced by %s at 0x%x," | |
4854 | " coping by using copy in DWP [in module %s]"), | |
4855 | hex_string (sig), | |
4856 | cu->per_cu->is_debug_types ? "TU" : "CU", | |
4857 | cu->per_cu->offset.sect_off, | |
4262abfb | 4858 | objfile_name (objfile)); |
a2ce51a0 DE |
4859 | |
4860 | return sig_entry; | |
4861 | } | |
4862 | ||
380bca97 | 4863 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
4864 | Returns NULL if signature SIG is not present in the table. |
4865 | It is up to the caller to complain about this. */ | |
348e048f DE |
4866 | |
4867 | static struct signatured_type * | |
a2ce51a0 | 4868 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 4869 | { |
a2ce51a0 DE |
4870 | if (cu->dwo_unit |
4871 | && dwarf2_per_objfile->using_index) | |
4872 | { | |
4873 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
4874 | These cases require special processing. */ | |
4875 | if (get_dwp_file () == NULL) | |
4876 | return lookup_dwo_signatured_type (cu, sig); | |
4877 | else | |
4878 | return lookup_dwp_signatured_type (cu, sig); | |
4879 | } | |
4880 | else | |
4881 | { | |
4882 | struct signatured_type find_entry, *entry; | |
348e048f | 4883 | |
a2ce51a0 DE |
4884 | if (dwarf2_per_objfile->signatured_types == NULL) |
4885 | return NULL; | |
4886 | find_entry.signature = sig; | |
4887 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4888 | return entry; | |
4889 | } | |
348e048f | 4890 | } |
42e7ad6c DE |
4891 | \f |
4892 | /* Low level DIE reading support. */ | |
348e048f | 4893 | |
d85a05f0 DJ |
4894 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4895 | ||
4896 | static void | |
4897 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4898 | struct dwarf2_cu *cu, |
3019eac3 DE |
4899 | struct dwarf2_section_info *section, |
4900 | struct dwo_file *dwo_file) | |
d85a05f0 | 4901 | { |
fceca515 | 4902 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 4903 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 4904 | reader->cu = cu; |
3019eac3 | 4905 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4906 | reader->die_section = section; |
4907 | reader->buffer = section->buffer; | |
f664829e | 4908 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 4909 | reader->comp_dir = NULL; |
d85a05f0 DJ |
4910 | } |
4911 | ||
b0c7bfa9 DE |
4912 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4913 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
4914 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
4915 | already. | |
4916 | ||
4917 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
4918 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
4919 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
4920 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
4921 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
4922 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
4923 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
4924 | are filled in with the info of the DIE from the DWO file. | |
4925 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
4926 | provided an abbrev table to use. | |
4927 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
4928 | ||
4929 | static int | |
4930 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
4931 | struct dwo_unit *dwo_unit, | |
4932 | int abbrev_table_provided, | |
4933 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 4934 | const char *stub_comp_dir, |
b0c7bfa9 | 4935 | struct die_reader_specs *result_reader, |
d521ce57 | 4936 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
4937 | struct die_info **result_comp_unit_die, |
4938 | int *result_has_children) | |
4939 | { | |
4940 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4941 | struct dwarf2_cu *cu = this_cu->cu; | |
4942 | struct dwarf2_section_info *section; | |
4943 | bfd *abfd; | |
d521ce57 | 4944 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
4945 | ULONGEST signature; /* Or dwo_id. */ |
4946 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
4947 | int i,num_extra_attrs; | |
4948 | struct dwarf2_section_info *dwo_abbrev_section; | |
4949 | struct attribute *attr; | |
4950 | struct die_info *comp_unit_die; | |
4951 | ||
b0aeadb3 DE |
4952 | /* At most one of these may be provided. */ |
4953 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 4954 | |
b0c7bfa9 DE |
4955 | /* These attributes aren't processed until later: |
4956 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
4957 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
4958 | referenced later. However, these attributes are found in the stub | |
4959 | which we won't have later. In order to not impose this complication | |
4960 | on the rest of the code, we read them here and copy them to the | |
4961 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
4962 | |
4963 | stmt_list = NULL; | |
4964 | low_pc = NULL; | |
4965 | high_pc = NULL; | |
4966 | ranges = NULL; | |
4967 | comp_dir = NULL; | |
4968 | ||
4969 | if (stub_comp_unit_die != NULL) | |
4970 | { | |
4971 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
4972 | DWO file. */ | |
4973 | if (! this_cu->is_debug_types) | |
4974 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
4975 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
4976 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
4977 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
4978 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
4979 | ||
4980 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
4981 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
4982 | cu->addr_base = 0; | |
4983 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
4984 | if (attr) | |
4985 | cu->addr_base = DW_UNSND (attr); | |
4986 | ||
4987 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
4988 | We need the value before we can process DW_AT_ranges. */ | |
4989 | cu->ranges_base = 0; | |
4990 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
4991 | if (attr) | |
4992 | cu->ranges_base = DW_UNSND (attr); | |
4993 | } | |
a2ce51a0 DE |
4994 | else if (stub_comp_dir != NULL) |
4995 | { | |
4996 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
4997 | comp_dir = (struct attribute *) | |
4998 | obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir)); | |
4999 | comp_dir->name = DW_AT_comp_dir; | |
5000 | comp_dir->form = DW_FORM_string; | |
5001 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5002 | DW_STRING (comp_dir) = stub_comp_dir; | |
5003 | } | |
b0c7bfa9 DE |
5004 | |
5005 | /* Set up for reading the DWO CU/TU. */ | |
5006 | cu->dwo_unit = dwo_unit; | |
5007 | section = dwo_unit->section; | |
5008 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5009 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
5010 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
5011 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
5012 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5013 | ||
5014 | if (this_cu->is_debug_types) | |
5015 | { | |
5016 | ULONGEST header_signature; | |
5017 | cu_offset type_offset_in_tu; | |
5018 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
5019 | ||
5020 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
5021 | dwo_abbrev_section, | |
5022 | info_ptr, | |
5023 | &header_signature, | |
5024 | &type_offset_in_tu); | |
a2ce51a0 DE |
5025 | /* This is not an assert because it can be caused by bad debug info. */ |
5026 | if (sig_type->signature != header_signature) | |
5027 | { | |
5028 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5029 | " TU at offset 0x%x [in module %s]"), | |
5030 | hex_string (sig_type->signature), | |
5031 | hex_string (header_signature), | |
5032 | dwo_unit->offset.sect_off, | |
5033 | bfd_get_filename (abfd)); | |
5034 | } | |
b0c7bfa9 DE |
5035 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
5036 | /* For DWOs coming from DWP files, we don't know the CU length | |
5037 | nor the type's offset in the TU until now. */ | |
5038 | dwo_unit->length = get_cu_length (&cu->header); | |
5039 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
5040 | ||
5041 | /* Establish the type offset that can be used to lookup the type. | |
5042 | For DWO files, we don't know it until now. */ | |
5043 | sig_type->type_offset_in_section.sect_off = | |
5044 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
5045 | } | |
5046 | else | |
5047 | { | |
5048 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5049 | dwo_abbrev_section, | |
5050 | info_ptr, 0); | |
5051 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
5052 | /* For DWOs coming from DWP files, we don't know the CU length | |
5053 | until now. */ | |
5054 | dwo_unit->length = get_cu_length (&cu->header); | |
5055 | } | |
5056 | ||
02142a6c DE |
5057 | /* Replace the CU's original abbrev table with the DWO's. |
5058 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5059 | if (abbrev_table_provided) |
5060 | { | |
5061 | /* Don't free the provided abbrev table, the caller of | |
5062 | init_cutu_and_read_dies owns it. */ | |
5063 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5064 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5065 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5066 | } | |
5067 | else | |
5068 | { | |
5069 | dwarf2_free_abbrev_table (cu); | |
5070 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5071 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5072 | } |
5073 | ||
5074 | /* Read in the die, but leave space to copy over the attributes | |
5075 | from the stub. This has the benefit of simplifying the rest of | |
5076 | the code - all the work to maintain the illusion of a single | |
5077 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5078 | num_extra_attrs = ((stmt_list != NULL) | |
5079 | + (low_pc != NULL) | |
5080 | + (high_pc != NULL) | |
5081 | + (ranges != NULL) | |
5082 | + (comp_dir != NULL)); | |
5083 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5084 | result_has_children, num_extra_attrs); | |
5085 | ||
5086 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5087 | comp_unit_die = *result_comp_unit_die; | |
5088 | i = comp_unit_die->num_attrs; | |
5089 | if (stmt_list != NULL) | |
5090 | comp_unit_die->attrs[i++] = *stmt_list; | |
5091 | if (low_pc != NULL) | |
5092 | comp_unit_die->attrs[i++] = *low_pc; | |
5093 | if (high_pc != NULL) | |
5094 | comp_unit_die->attrs[i++] = *high_pc; | |
5095 | if (ranges != NULL) | |
5096 | comp_unit_die->attrs[i++] = *ranges; | |
5097 | if (comp_dir != NULL) | |
5098 | comp_unit_die->attrs[i++] = *comp_dir; | |
5099 | comp_unit_die->num_attrs += num_extra_attrs; | |
5100 | ||
bf6af496 DE |
5101 | if (dwarf2_die_debug) |
5102 | { | |
5103 | fprintf_unfiltered (gdb_stdlog, | |
5104 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5105 | get_section_name (section), |
bf6af496 DE |
5106 | (unsigned) (begin_info_ptr - section->buffer), |
5107 | bfd_get_filename (abfd)); | |
5108 | dump_die (comp_unit_die, dwarf2_die_debug); | |
5109 | } | |
5110 | ||
a2ce51a0 DE |
5111 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5112 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5113 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5114 | to get it via circuitous means. Blech. */ | |
5115 | if (comp_dir != NULL) | |
5116 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5117 | ||
b0c7bfa9 DE |
5118 | /* Skip dummy compilation units. */ |
5119 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5120 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5121 | return 0; | |
5122 | ||
5123 | *result_info_ptr = info_ptr; | |
5124 | return 1; | |
5125 | } | |
5126 | ||
5127 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5128 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5129 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5130 | |
5131 | static struct dwo_unit * | |
5132 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5133 | struct die_info *comp_unit_die) | |
5134 | { | |
5135 | struct dwarf2_cu *cu = this_cu->cu; | |
5136 | struct attribute *attr; | |
5137 | ULONGEST signature; | |
5138 | struct dwo_unit *dwo_unit; | |
5139 | const char *comp_dir, *dwo_name; | |
5140 | ||
a2ce51a0 DE |
5141 | gdb_assert (cu != NULL); |
5142 | ||
b0c7bfa9 DE |
5143 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
5144 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
5145 | gdb_assert (attr != NULL); | |
5146 | dwo_name = DW_STRING (attr); | |
5147 | comp_dir = NULL; | |
5148 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5149 | if (attr) | |
5150 | comp_dir = DW_STRING (attr); | |
5151 | ||
5152 | if (this_cu->is_debug_types) | |
5153 | { | |
5154 | struct signatured_type *sig_type; | |
5155 | ||
5156 | /* Since this_cu is the first member of struct signatured_type, | |
5157 | we can go from a pointer to one to a pointer to the other. */ | |
5158 | sig_type = (struct signatured_type *) this_cu; | |
5159 | signature = sig_type->signature; | |
5160 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5161 | } | |
5162 | else | |
5163 | { | |
5164 | struct attribute *attr; | |
5165 | ||
5166 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5167 | if (! attr) | |
5168 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5169 | " [in module %s]"), | |
4262abfb | 5170 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5171 | signature = DW_UNSND (attr); |
5172 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5173 | signature); | |
5174 | } | |
5175 | ||
b0c7bfa9 DE |
5176 | return dwo_unit; |
5177 | } | |
5178 | ||
a2ce51a0 DE |
5179 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5180 | Read a TU directly from a DWO file, bypassing the stub. */ | |
5181 | ||
5182 | static void | |
5183 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, int keep, | |
5184 | die_reader_func_ftype *die_reader_func, | |
5185 | void *data) | |
5186 | { | |
5187 | struct dwarf2_cu *cu; | |
5188 | struct signatured_type *sig_type; | |
5189 | struct cleanup *cleanups, *free_cu_cleanup; | |
5190 | struct die_reader_specs reader; | |
5191 | const gdb_byte *info_ptr; | |
5192 | struct die_info *comp_unit_die; | |
5193 | int has_children; | |
5194 | ||
5195 | /* Verify we can do the following downcast, and that we have the | |
5196 | data we need. */ | |
5197 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5198 | sig_type = (struct signatured_type *) this_cu; | |
5199 | gdb_assert (sig_type->dwo_unit != NULL); | |
5200 | ||
5201 | cleanups = make_cleanup (null_cleanup, NULL); | |
5202 | ||
5203 | gdb_assert (this_cu->cu == NULL); | |
5204 | cu = xmalloc (sizeof (*cu)); | |
5205 | init_one_comp_unit (cu, this_cu); | |
5206 | /* If an error occurs while loading, release our storage. */ | |
5207 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5208 | ||
5209 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5210 | 0 /* abbrev_table_provided */, | |
5211 | NULL /* stub_comp_unit_die */, | |
5212 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5213 | &reader, &info_ptr, | |
5214 | &comp_unit_die, &has_children) == 0) | |
5215 | { | |
5216 | /* Dummy die. */ | |
5217 | do_cleanups (cleanups); | |
5218 | return; | |
5219 | } | |
5220 | ||
5221 | /* All the "real" work is done here. */ | |
5222 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5223 | ||
5224 | /* This duplicates some code in init_cutu_and_read_dies, | |
5225 | but the alternative is making the latter more complex. | |
5226 | This function is only for the special case of using DWO files directly: | |
5227 | no point in overly complicating the general case just to handle this. */ | |
5228 | if (keep) | |
5229 | { | |
5230 | /* We've successfully allocated this compilation unit. Let our | |
5231 | caller clean it up when finished with it. */ | |
5232 | discard_cleanups (free_cu_cleanup); | |
5233 | ||
5234 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
5235 | So we have to manually free the abbrev table. */ | |
5236 | dwarf2_free_abbrev_table (cu); | |
5237 | ||
5238 | /* Link this CU into read_in_chain. */ | |
5239 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5240 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5241 | } | |
5242 | else | |
5243 | do_cleanups (free_cu_cleanup); | |
5244 | ||
5245 | do_cleanups (cleanups); | |
5246 | } | |
5247 | ||
fd820528 | 5248 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5249 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5250 | |
f4dc4d17 DE |
5251 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5252 | Otherwise the table specified in the comp unit header is read in and used. | |
5253 | This is an optimization for when we already have the abbrev table. | |
5254 | ||
dee91e82 DE |
5255 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5256 | Otherwise, a new CU is allocated with xmalloc. | |
5257 | ||
5258 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5259 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5260 | ||
5261 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5262 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5263 | |
70221824 | 5264 | static void |
fd820528 | 5265 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5266 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5267 | int use_existing_cu, int keep, |
5268 | die_reader_func_ftype *die_reader_func, | |
5269 | void *data) | |
c906108c | 5270 | { |
dee91e82 | 5271 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5272 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5273 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5274 | struct dwarf2_cu *cu; |
d521ce57 | 5275 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5276 | struct die_reader_specs reader; |
d85a05f0 | 5277 | struct die_info *comp_unit_die; |
dee91e82 | 5278 | int has_children; |
d85a05f0 | 5279 | struct attribute *attr; |
365156ad | 5280 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5281 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5282 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5283 | /* Non-zero if CU currently points to a DWO file and we need to |
5284 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5285 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5286 | int rereading_dwo_cu = 0; |
c906108c | 5287 | |
09406207 DE |
5288 | if (dwarf2_die_debug) |
5289 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5290 | this_cu->is_debug_types ? "type" : "comp", | |
5291 | this_cu->offset.sect_off); | |
5292 | ||
dee91e82 DE |
5293 | if (use_existing_cu) |
5294 | gdb_assert (keep); | |
23745b47 | 5295 | |
a2ce51a0 DE |
5296 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5297 | file (instead of going through the stub), short-circuit all of this. */ | |
5298 | if (this_cu->reading_dwo_directly) | |
5299 | { | |
5300 | /* Narrow down the scope of possibilities to have to understand. */ | |
5301 | gdb_assert (this_cu->is_debug_types); | |
5302 | gdb_assert (abbrev_table == NULL); | |
5303 | gdb_assert (!use_existing_cu); | |
5304 | init_tu_and_read_dwo_dies (this_cu, keep, die_reader_func, data); | |
5305 | return; | |
5306 | } | |
5307 | ||
dee91e82 DE |
5308 | cleanups = make_cleanup (null_cleanup, NULL); |
5309 | ||
5310 | /* This is cheap if the section is already read in. */ | |
5311 | dwarf2_read_section (objfile, section); | |
5312 | ||
5313 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5314 | |
5315 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5316 | |
5317 | if (use_existing_cu && this_cu->cu != NULL) | |
5318 | { | |
5319 | cu = this_cu->cu; | |
42e7ad6c DE |
5320 | |
5321 | /* If this CU is from a DWO file we need to start over, we need to | |
5322 | refetch the attributes from the skeleton CU. | |
5323 | This could be optimized by retrieving those attributes from when we | |
5324 | were here the first time: the previous comp_unit_die was stored in | |
5325 | comp_unit_obstack. But there's no data yet that we need this | |
5326 | optimization. */ | |
5327 | if (cu->dwo_unit != NULL) | |
5328 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5329 | } |
5330 | else | |
5331 | { | |
5332 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5333 | gdb_assert (this_cu->cu == NULL); | |
5334 | ||
5335 | cu = xmalloc (sizeof (*cu)); | |
5336 | init_one_comp_unit (cu, this_cu); | |
5337 | ||
5338 | /* If an error occurs while loading, release our storage. */ | |
365156ad | 5339 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5340 | } |
dee91e82 | 5341 | |
b0c7bfa9 | 5342 | /* Get the header. */ |
42e7ad6c DE |
5343 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5344 | { | |
5345 | /* We already have the header, there's no need to read it in again. */ | |
5346 | info_ptr += cu->header.first_die_offset.cu_off; | |
5347 | } | |
5348 | else | |
5349 | { | |
3019eac3 | 5350 | if (this_cu->is_debug_types) |
dee91e82 DE |
5351 | { |
5352 | ULONGEST signature; | |
42e7ad6c | 5353 | cu_offset type_offset_in_tu; |
dee91e82 | 5354 | |
4bdcc0c1 DE |
5355 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5356 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5357 | &signature, |
5358 | &type_offset_in_tu); | |
dee91e82 | 5359 | |
42e7ad6c DE |
5360 | /* Since per_cu is the first member of struct signatured_type, |
5361 | we can go from a pointer to one to a pointer to the other. */ | |
5362 | sig_type = (struct signatured_type *) this_cu; | |
5363 | gdb_assert (sig_type->signature == signature); | |
5364 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5365 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5366 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5367 | ||
42e7ad6c DE |
5368 | /* LENGTH has not been set yet for type units if we're |
5369 | using .gdb_index. */ | |
1ce1cefd | 5370 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5371 | |
5372 | /* Establish the type offset that can be used to lookup the type. */ | |
5373 | sig_type->type_offset_in_section.sect_off = | |
5374 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5375 | } |
5376 | else | |
5377 | { | |
4bdcc0c1 DE |
5378 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5379 | abbrev_section, | |
5380 | info_ptr, 0); | |
dee91e82 DE |
5381 | |
5382 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5383 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5384 | } |
5385 | } | |
10b3939b | 5386 | |
6caca83c | 5387 | /* Skip dummy compilation units. */ |
dee91e82 | 5388 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5389 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5390 | { | |
dee91e82 | 5391 | do_cleanups (cleanups); |
21b2bd31 | 5392 | return; |
6caca83c CC |
5393 | } |
5394 | ||
433df2d4 DE |
5395 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5396 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5397 | done. Note that it's important that if the CU had an abbrev table |
5398 | on entry we don't free it when we're done: Somewhere up the call stack | |
5399 | it may be in use. */ | |
f4dc4d17 DE |
5400 | if (abbrev_table != NULL) |
5401 | { | |
5402 | gdb_assert (cu->abbrev_table == NULL); | |
5403 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5404 | == abbrev_table->offset.sect_off); | |
5405 | cu->abbrev_table = abbrev_table; | |
5406 | } | |
5407 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5408 | { |
4bdcc0c1 | 5409 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5410 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5411 | } | |
42e7ad6c DE |
5412 | else if (rereading_dwo_cu) |
5413 | { | |
5414 | dwarf2_free_abbrev_table (cu); | |
5415 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5416 | } | |
af703f96 | 5417 | |
dee91e82 | 5418 | /* Read the top level CU/TU die. */ |
3019eac3 | 5419 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5420 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5421 | |
b0c7bfa9 DE |
5422 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5423 | from the DWO file. | |
5424 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5425 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5426 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5427 | if (attr) | |
5428 | { | |
3019eac3 | 5429 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5430 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5431 | |
5432 | if (has_children) | |
6a506a2d DE |
5433 | { |
5434 | complaint (&symfile_complaints, | |
5435 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5436 | " has children (offset 0x%x) [in module %s]"), | |
5437 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5438 | } | |
b0c7bfa9 | 5439 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5440 | if (dwo_unit != NULL) |
3019eac3 | 5441 | { |
6a506a2d DE |
5442 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5443 | abbrev_table != NULL, | |
a2ce51a0 | 5444 | comp_unit_die, NULL, |
6a506a2d DE |
5445 | &reader, &info_ptr, |
5446 | &dwo_comp_unit_die, &has_children) == 0) | |
5447 | { | |
5448 | /* Dummy die. */ | |
5449 | do_cleanups (cleanups); | |
5450 | return; | |
5451 | } | |
5452 | comp_unit_die = dwo_comp_unit_die; | |
5453 | } | |
5454 | else | |
5455 | { | |
5456 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5457 | the stub. A complaint has already been logged. There's | |
5458 | not much more we can do except pass on the stub DIE to | |
5459 | die_reader_func. We don't want to throw an error on bad | |
5460 | debug info. */ | |
3019eac3 DE |
5461 | } |
5462 | } | |
5463 | ||
b0c7bfa9 | 5464 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5465 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5466 | ||
b0c7bfa9 | 5467 | /* Done, clean up. */ |
365156ad | 5468 | if (free_cu_cleanup != NULL) |
348e048f | 5469 | { |
365156ad TT |
5470 | if (keep) |
5471 | { | |
5472 | /* We've successfully allocated this compilation unit. Let our | |
5473 | caller clean it up when finished with it. */ | |
5474 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5475 | |
365156ad TT |
5476 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5477 | So we have to manually free the abbrev table. */ | |
5478 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5479 | |
365156ad TT |
5480 | /* Link this CU into read_in_chain. */ |
5481 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5482 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5483 | } | |
5484 | else | |
5485 | do_cleanups (free_cu_cleanup); | |
348e048f | 5486 | } |
365156ad TT |
5487 | |
5488 | do_cleanups (cleanups); | |
dee91e82 DE |
5489 | } |
5490 | ||
33e80786 DE |
5491 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5492 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5493 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5494 | |
5495 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5496 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5497 | |
5498 | We fill in THIS_CU->length. | |
5499 | ||
5500 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5501 | linker) then DIE_READER_FUNC will not get called. | |
5502 | ||
5503 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5504 | This is done in order to not leave THIS_CU->cu in a state where we have |
5505 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5506 | |
5507 | static void | |
5508 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5509 | struct dwo_file *dwo_file, |
dee91e82 DE |
5510 | die_reader_func_ftype *die_reader_func, |
5511 | void *data) | |
5512 | { | |
5513 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5514 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5515 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5516 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5517 | struct dwarf2_cu cu; |
d521ce57 | 5518 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5519 | struct die_reader_specs reader; |
5520 | struct cleanup *cleanups; | |
5521 | struct die_info *comp_unit_die; | |
5522 | int has_children; | |
5523 | ||
09406207 DE |
5524 | if (dwarf2_die_debug) |
5525 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5526 | this_cu->is_debug_types ? "type" : "comp", | |
5527 | this_cu->offset.sect_off); | |
5528 | ||
dee91e82 DE |
5529 | gdb_assert (this_cu->cu == NULL); |
5530 | ||
33e80786 DE |
5531 | abbrev_section = (dwo_file != NULL |
5532 | ? &dwo_file->sections.abbrev | |
5533 | : get_abbrev_section_for_cu (this_cu)); | |
5534 | ||
dee91e82 DE |
5535 | /* This is cheap if the section is already read in. */ |
5536 | dwarf2_read_section (objfile, section); | |
5537 | ||
5538 | init_one_comp_unit (&cu, this_cu); | |
5539 | ||
5540 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5541 | ||
5542 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5543 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5544 | abbrev_section, info_ptr, | |
3019eac3 | 5545 | this_cu->is_debug_types); |
dee91e82 | 5546 | |
1ce1cefd | 5547 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5548 | |
5549 | /* Skip dummy compilation units. */ | |
5550 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5551 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5552 | { |
dee91e82 | 5553 | do_cleanups (cleanups); |
21b2bd31 | 5554 | return; |
93311388 | 5555 | } |
72bf9492 | 5556 | |
dee91e82 DE |
5557 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5558 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5559 | ||
3019eac3 | 5560 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5561 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5562 | ||
5563 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5564 | ||
5565 | do_cleanups (cleanups); | |
5566 | } | |
5567 | ||
3019eac3 DE |
5568 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5569 | does not lookup the specified DWO file. | |
5570 | This cannot be used to read DWO files. | |
dee91e82 DE |
5571 | |
5572 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5573 | This is done in order to not leave THIS_CU->cu in a state where we have |
5574 | to care whether it refers to the "main" CU or the DWO CU. | |
5575 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5576 | |
5577 | static void | |
5578 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5579 | die_reader_func_ftype *die_reader_func, | |
5580 | void *data) | |
5581 | { | |
33e80786 | 5582 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5583 | } |
0018ea6f DE |
5584 | \f |
5585 | /* Type Unit Groups. | |
dee91e82 | 5586 | |
0018ea6f DE |
5587 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5588 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5589 | so that all types coming from the same compilation (.o file) are grouped | |
5590 | together. A future step could be to put the types in the same symtab as | |
5591 | the CU the types ultimately came from. */ | |
ff013f42 | 5592 | |
f4dc4d17 DE |
5593 | static hashval_t |
5594 | hash_type_unit_group (const void *item) | |
5595 | { | |
094b34ac | 5596 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 5597 | |
094b34ac | 5598 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5599 | } |
348e048f DE |
5600 | |
5601 | static int | |
f4dc4d17 | 5602 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5603 | { |
f4dc4d17 DE |
5604 | const struct type_unit_group *lhs = item_lhs; |
5605 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 5606 | |
094b34ac | 5607 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5608 | } |
348e048f | 5609 | |
f4dc4d17 DE |
5610 | /* Allocate a hash table for type unit groups. */ |
5611 | ||
5612 | static htab_t | |
5613 | allocate_type_unit_groups_table (void) | |
5614 | { | |
5615 | return htab_create_alloc_ex (3, | |
5616 | hash_type_unit_group, | |
5617 | eq_type_unit_group, | |
5618 | NULL, | |
5619 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5620 | hashtab_obstack_allocate, | |
5621 | dummy_obstack_deallocate); | |
5622 | } | |
dee91e82 | 5623 | |
f4dc4d17 DE |
5624 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5625 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5626 | of any one psymtab grow too big. */ | |
5627 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5628 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5629 | |
094b34ac | 5630 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5631 | Create the type_unit_group object used to hold one or more TUs. */ |
5632 | ||
5633 | static struct type_unit_group * | |
094b34ac | 5634 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5635 | { |
5636 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5637 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5638 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5639 | |
5640 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5641 | struct type_unit_group); | |
094b34ac | 5642 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5643 | per_cu->objfile = objfile; |
f4dc4d17 | 5644 | |
094b34ac DE |
5645 | if (dwarf2_per_objfile->using_index) |
5646 | { | |
5647 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5648 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5649 | } |
5650 | else | |
5651 | { | |
5652 | unsigned int line_offset = line_offset_struct.sect_off; | |
5653 | struct partial_symtab *pst; | |
5654 | char *name; | |
5655 | ||
5656 | /* Give the symtab a useful name for debug purposes. */ | |
5657 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5658 | name = xstrprintf ("<type_units_%d>", | |
5659 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5660 | else | |
5661 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5662 | ||
5663 | pst = create_partial_symtab (per_cu, name); | |
5664 | pst->anonymous = 1; | |
f4dc4d17 | 5665 | |
094b34ac DE |
5666 | xfree (name); |
5667 | } | |
f4dc4d17 | 5668 | |
094b34ac DE |
5669 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5670 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5671 | |
5672 | return tu_group; | |
5673 | } | |
5674 | ||
094b34ac DE |
5675 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5676 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5677 | |
5678 | static struct type_unit_group * | |
ff39bb5e | 5679 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5680 | { |
5681 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5682 | struct type_unit_group *tu_group; | |
5683 | void **slot; | |
5684 | unsigned int line_offset; | |
5685 | struct type_unit_group type_unit_group_for_lookup; | |
5686 | ||
5687 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5688 | { | |
5689 | dwarf2_per_objfile->type_unit_groups = | |
5690 | allocate_type_unit_groups_table (); | |
5691 | } | |
5692 | ||
5693 | /* Do we need to create a new group, or can we use an existing one? */ | |
5694 | ||
5695 | if (stmt_list) | |
5696 | { | |
5697 | line_offset = DW_UNSND (stmt_list); | |
5698 | ++tu_stats->nr_symtab_sharers; | |
5699 | } | |
5700 | else | |
5701 | { | |
5702 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5703 | We can do various things here like create one group per TU or | |
5704 | spread them over multiple groups to split up the expansion work. | |
5705 | To avoid worst case scenarios (too many groups or too large groups) | |
5706 | we, umm, group them in bunches. */ | |
5707 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5708 | | (tu_stats->nr_stmt_less_type_units | |
5709 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5710 | ++tu_stats->nr_stmt_less_type_units; | |
5711 | } | |
5712 | ||
094b34ac DE |
5713 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5714 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5715 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5716 | &type_unit_group_for_lookup, INSERT); | |
5717 | if (*slot != NULL) | |
5718 | { | |
5719 | tu_group = *slot; | |
5720 | gdb_assert (tu_group != NULL); | |
5721 | } | |
5722 | else | |
5723 | { | |
5724 | sect_offset line_offset_struct; | |
5725 | ||
5726 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5727 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5728 | *slot = tu_group; |
5729 | ++tu_stats->nr_symtabs; | |
5730 | } | |
5731 | ||
5732 | return tu_group; | |
5733 | } | |
0018ea6f DE |
5734 | \f |
5735 | /* Partial symbol tables. */ | |
5736 | ||
5737 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5738 | ||
5739 | The caller must fill in the following details: | |
5740 | dirname, textlow, texthigh. */ | |
5741 | ||
5742 | static struct partial_symtab * | |
5743 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5744 | { | |
5745 | struct objfile *objfile = per_cu->objfile; | |
5746 | struct partial_symtab *pst; | |
5747 | ||
5748 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
5749 | name, 0, | |
5750 | objfile->global_psymbols.next, | |
5751 | objfile->static_psymbols.next); | |
5752 | ||
5753 | pst->psymtabs_addrmap_supported = 1; | |
5754 | ||
5755 | /* This is the glue that links PST into GDB's symbol API. */ | |
5756 | pst->read_symtab_private = per_cu; | |
5757 | pst->read_symtab = dwarf2_read_symtab; | |
5758 | per_cu->v.psymtab = pst; | |
5759 | ||
5760 | return pst; | |
5761 | } | |
5762 | ||
b93601f3 TT |
5763 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5764 | type. */ | |
5765 | ||
5766 | struct process_psymtab_comp_unit_data | |
5767 | { | |
5768 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5769 | ||
5770 | int want_partial_unit; | |
5771 | ||
5772 | /* The "pretend" language that is used if the CU doesn't declare a | |
5773 | language. */ | |
5774 | ||
5775 | enum language pretend_language; | |
5776 | }; | |
5777 | ||
0018ea6f DE |
5778 | /* die_reader_func for process_psymtab_comp_unit. */ |
5779 | ||
5780 | static void | |
5781 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5782 | const gdb_byte *info_ptr, |
0018ea6f DE |
5783 | struct die_info *comp_unit_die, |
5784 | int has_children, | |
5785 | void *data) | |
5786 | { | |
5787 | struct dwarf2_cu *cu = reader->cu; | |
5788 | struct objfile *objfile = cu->objfile; | |
5789 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5790 | struct attribute *attr; | |
5791 | CORE_ADDR baseaddr; | |
5792 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5793 | struct partial_symtab *pst; | |
5794 | int has_pc_info; | |
5795 | const char *filename; | |
b93601f3 | 5796 | struct process_psymtab_comp_unit_data *info = data; |
0018ea6f | 5797 | |
b93601f3 | 5798 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
5799 | return; |
5800 | ||
5801 | gdb_assert (! per_cu->is_debug_types); | |
5802 | ||
b93601f3 | 5803 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
5804 | |
5805 | cu->list_in_scope = &file_symbols; | |
5806 | ||
5807 | /* Allocate a new partial symbol table structure. */ | |
5808 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
5809 | if (attr == NULL || !DW_STRING (attr)) | |
5810 | filename = ""; | |
5811 | else | |
5812 | filename = DW_STRING (attr); | |
5813 | ||
5814 | pst = create_partial_symtab (per_cu, filename); | |
5815 | ||
5816 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
5817 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5818 | if (attr != NULL) | |
5819 | pst->dirname = DW_STRING (attr); | |
5820 | ||
5821 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5822 | ||
5823 | dwarf2_find_base_address (comp_unit_die, cu); | |
5824 | ||
5825 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5826 | `DW_AT_ranges'. */ | |
5827 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
5828 | &best_highpc, cu, pst); | |
5829 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
5830 | /* Store the contiguous range if it is not empty; it can be empty for | |
5831 | CUs with no code. */ | |
5832 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
5833 | best_lowpc + baseaddr, | |
5834 | best_highpc + baseaddr - 1, pst); | |
5835 | ||
5836 | /* Check if comp unit has_children. | |
5837 | If so, read the rest of the partial symbols from this comp unit. | |
5838 | If not, there's no more debug_info for this comp unit. */ | |
5839 | if (has_children) | |
5840 | { | |
5841 | struct partial_die_info *first_die; | |
5842 | CORE_ADDR lowpc, highpc; | |
5843 | ||
5844 | lowpc = ((CORE_ADDR) -1); | |
5845 | highpc = ((CORE_ADDR) 0); | |
5846 | ||
5847 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5848 | ||
5849 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
5850 | ! has_pc_info, cu); | |
5851 | ||
5852 | /* If we didn't find a lowpc, set it to highpc to avoid | |
5853 | complaints from `maint check'. */ | |
5854 | if (lowpc == ((CORE_ADDR) -1)) | |
5855 | lowpc = highpc; | |
5856 | ||
5857 | /* If the compilation unit didn't have an explicit address range, | |
5858 | then use the information extracted from its child dies. */ | |
5859 | if (! has_pc_info) | |
5860 | { | |
5861 | best_lowpc = lowpc; | |
5862 | best_highpc = highpc; | |
5863 | } | |
5864 | } | |
5865 | pst->textlow = best_lowpc + baseaddr; | |
5866 | pst->texthigh = best_highpc + baseaddr; | |
5867 | ||
5868 | pst->n_global_syms = objfile->global_psymbols.next - | |
5869 | (objfile->global_psymbols.list + pst->globals_offset); | |
5870 | pst->n_static_syms = objfile->static_psymbols.next - | |
5871 | (objfile->static_psymbols.list + pst->statics_offset); | |
5872 | sort_pst_symbols (objfile, pst); | |
5873 | ||
5874 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
5875 | { | |
5876 | int i; | |
5877 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5878 | struct dwarf2_per_cu_data *iter; | |
5879 | ||
5880 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
5881 | post-pass. */ | |
5882 | pst->number_of_dependencies = len; | |
5883 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5884 | len * sizeof (struct symtab *)); | |
5885 | for (i = 0; | |
5886 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
5887 | i, iter); | |
5888 | ++i) | |
5889 | pst->dependencies[i] = iter->v.psymtab; | |
5890 | ||
5891 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5892 | } | |
5893 | ||
5894 | /* Get the list of files included in the current compilation unit, | |
5895 | and build a psymtab for each of them. */ | |
5896 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
5897 | ||
5898 | if (dwarf2_read_debug) | |
5899 | { | |
5900 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
5901 | ||
5902 | fprintf_unfiltered (gdb_stdlog, | |
5903 | "Psymtab for %s unit @0x%x: %s - %s" | |
5904 | ", %d global, %d static syms\n", | |
5905 | per_cu->is_debug_types ? "type" : "comp", | |
5906 | per_cu->offset.sect_off, | |
5907 | paddress (gdbarch, pst->textlow), | |
5908 | paddress (gdbarch, pst->texthigh), | |
5909 | pst->n_global_syms, pst->n_static_syms); | |
5910 | } | |
5911 | } | |
5912 | ||
5913 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5914 | Process compilation unit THIS_CU for a psymtab. */ | |
5915 | ||
5916 | static void | |
5917 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
5918 | int want_partial_unit, |
5919 | enum language pretend_language) | |
0018ea6f | 5920 | { |
b93601f3 TT |
5921 | struct process_psymtab_comp_unit_data info; |
5922 | ||
0018ea6f DE |
5923 | /* If this compilation unit was already read in, free the |
5924 | cached copy in order to read it in again. This is | |
5925 | necessary because we skipped some symbols when we first | |
5926 | read in the compilation unit (see load_partial_dies). | |
5927 | This problem could be avoided, but the benefit is unclear. */ | |
5928 | if (this_cu->cu != NULL) | |
5929 | free_one_cached_comp_unit (this_cu); | |
5930 | ||
5931 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
5932 | info.want_partial_unit = want_partial_unit; |
5933 | info.pretend_language = pretend_language; | |
0018ea6f DE |
5934 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
5935 | process_psymtab_comp_unit_reader, | |
b93601f3 | 5936 | &info); |
0018ea6f DE |
5937 | |
5938 | /* Age out any secondary CUs. */ | |
5939 | age_cached_comp_units (); | |
5940 | } | |
f4dc4d17 DE |
5941 | |
5942 | /* Reader function for build_type_psymtabs. */ | |
5943 | ||
5944 | static void | |
5945 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5946 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
5947 | struct die_info *type_unit_die, |
5948 | int has_children, | |
5949 | void *data) | |
5950 | { | |
5951 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5952 | struct dwarf2_cu *cu = reader->cu; | |
5953 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 5954 | struct signatured_type *sig_type; |
f4dc4d17 DE |
5955 | struct type_unit_group *tu_group; |
5956 | struct attribute *attr; | |
5957 | struct partial_die_info *first_die; | |
5958 | CORE_ADDR lowpc, highpc; | |
5959 | struct partial_symtab *pst; | |
5960 | ||
5961 | gdb_assert (data == NULL); | |
0186c6a7 DE |
5962 | gdb_assert (per_cu->is_debug_types); |
5963 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
5964 | |
5965 | if (! has_children) | |
5966 | return; | |
5967 | ||
5968 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 5969 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 5970 | |
0186c6a7 | 5971 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
5972 | |
5973 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
5974 | cu->list_in_scope = &file_symbols; | |
5975 | pst = create_partial_symtab (per_cu, ""); | |
5976 | pst->anonymous = 1; | |
5977 | ||
5978 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5979 | ||
5980 | lowpc = (CORE_ADDR) -1; | |
5981 | highpc = (CORE_ADDR) 0; | |
5982 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
5983 | ||
5984 | pst->n_global_syms = objfile->global_psymbols.next - | |
5985 | (objfile->global_psymbols.list + pst->globals_offset); | |
5986 | pst->n_static_syms = objfile->static_psymbols.next - | |
5987 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 5988 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
5989 | } |
5990 | ||
73051182 DE |
5991 | /* Struct used to sort TUs by their abbreviation table offset. */ |
5992 | ||
5993 | struct tu_abbrev_offset | |
5994 | { | |
5995 | struct signatured_type *sig_type; | |
5996 | sect_offset abbrev_offset; | |
5997 | }; | |
5998 | ||
5999 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6000 | ||
6001 | static int | |
6002 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6003 | { | |
6004 | const struct tu_abbrev_offset * const *a = ap; | |
6005 | const struct tu_abbrev_offset * const *b = bp; | |
6006 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
6007 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
6008 | ||
6009 | return (aoff > boff) - (aoff < boff); | |
6010 | } | |
6011 | ||
6012 | /* Efficiently read all the type units. | |
6013 | This does the bulk of the work for build_type_psymtabs. | |
6014 | ||
6015 | The efficiency is because we sort TUs by the abbrev table they use and | |
6016 | only read each abbrev table once. In one program there are 200K TUs | |
6017 | sharing 8K abbrev tables. | |
6018 | ||
6019 | The main purpose of this function is to support building the | |
6020 | dwarf2_per_objfile->type_unit_groups table. | |
6021 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6022 | can collapse the search space by grouping them by stmt_list. | |
6023 | The savings can be significant, in the same program from above the 200K TUs | |
6024 | share 8K stmt_list tables. | |
6025 | ||
6026 | FUNC is expected to call get_type_unit_group, which will create the | |
6027 | struct type_unit_group if necessary and add it to | |
6028 | dwarf2_per_objfile->type_unit_groups. */ | |
6029 | ||
6030 | static void | |
6031 | build_type_psymtabs_1 (void) | |
6032 | { | |
6033 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6034 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6035 | struct cleanup *cleanups; | |
6036 | struct abbrev_table *abbrev_table; | |
6037 | sect_offset abbrev_offset; | |
6038 | struct tu_abbrev_offset *sorted_by_abbrev; | |
6039 | struct type_unit_group **iter; | |
6040 | int i; | |
6041 | ||
6042 | /* It's up to the caller to not call us multiple times. */ | |
6043 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6044 | ||
6045 | if (dwarf2_per_objfile->n_type_units == 0) | |
6046 | return; | |
6047 | ||
6048 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6049 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6050 | read each abbrev table in. | |
6051 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6052 | This is simpler and efficient enough for now. | |
6053 | ||
6054 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6055 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6056 | stmt_list value too so in practice this should work well. | |
6057 | ||
6058 | The basic algorithm here is: | |
6059 | ||
6060 | sort TUs by abbrev table | |
6061 | for each TU with same abbrev table: | |
6062 | read abbrev table if first user | |
6063 | read TU top level DIE | |
6064 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6065 | call FUNC */ | |
6066 | ||
6067 | if (dwarf2_read_debug) | |
6068 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
6069 | ||
6070 | /* Sort in a separate table to maintain the order of all_type_units | |
6071 | for .gdb_index: TU indices directly index all_type_units. */ | |
6072 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6073 | dwarf2_per_objfile->n_type_units); | |
6074 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6075 | { | |
6076 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6077 | ||
6078 | sorted_by_abbrev[i].sig_type = sig_type; | |
6079 | sorted_by_abbrev[i].abbrev_offset = | |
6080 | read_abbrev_offset (sig_type->per_cu.section, | |
6081 | sig_type->per_cu.offset); | |
6082 | } | |
6083 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6084 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6085 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6086 | ||
6087 | abbrev_offset.sect_off = ~(unsigned) 0; | |
6088 | abbrev_table = NULL; | |
6089 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6090 | ||
6091 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6092 | { | |
6093 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6094 | ||
6095 | /* Switch to the next abbrev table if necessary. */ | |
6096 | if (abbrev_table == NULL | |
6097 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
6098 | { | |
6099 | if (abbrev_table != NULL) | |
6100 | { | |
6101 | abbrev_table_free (abbrev_table); | |
6102 | /* Reset to NULL in case abbrev_table_read_table throws | |
6103 | an error: abbrev_table_free_cleanup will get called. */ | |
6104 | abbrev_table = NULL; | |
6105 | } | |
6106 | abbrev_offset = tu->abbrev_offset; | |
6107 | abbrev_table = | |
6108 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6109 | abbrev_offset); | |
6110 | ++tu_stats->nr_uniq_abbrev_tables; | |
6111 | } | |
6112 | ||
6113 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6114 | build_type_psymtabs_reader, NULL); | |
6115 | } | |
6116 | ||
6117 | /* type_unit_groups can be NULL if there is an error in the debug info. | |
6118 | Just create an empty table so the rest of gdb doesn't have to watch | |
6119 | for this error case. */ | |
6120 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6121 | { | |
6122 | dwarf2_per_objfile->type_unit_groups = | |
6123 | allocate_type_unit_groups_table (); | |
6124 | } | |
6125 | ||
6126 | do_cleanups (cleanups); | |
6127 | ||
6128 | if (dwarf2_read_debug) | |
6129 | { | |
6130 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
6131 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6132 | dwarf2_per_objfile->n_type_units); | |
6133 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6134 | tu_stats->nr_uniq_abbrev_tables); | |
6135 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6136 | tu_stats->nr_symtabs); | |
6137 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6138 | tu_stats->nr_symtab_sharers); | |
6139 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6140 | tu_stats->nr_stmt_less_type_units); | |
6141 | } | |
6142 | } | |
6143 | ||
f4dc4d17 DE |
6144 | /* Traversal function for build_type_psymtabs. */ |
6145 | ||
6146 | static int | |
6147 | build_type_psymtab_dependencies (void **slot, void *info) | |
6148 | { | |
6149 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6150 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6151 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6152 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6153 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6154 | struct signatured_type *iter; | |
f4dc4d17 DE |
6155 | int i; |
6156 | ||
6157 | gdb_assert (len > 0); | |
0186c6a7 | 6158 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6159 | |
6160 | pst->number_of_dependencies = len; | |
6161 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
6162 | len * sizeof (struct psymtab *)); | |
6163 | for (i = 0; | |
0186c6a7 | 6164 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6165 | ++i) |
6166 | { | |
0186c6a7 DE |
6167 | gdb_assert (iter->per_cu.is_debug_types); |
6168 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6169 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6170 | } |
6171 | ||
0186c6a7 | 6172 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6173 | |
6174 | return 1; | |
6175 | } | |
6176 | ||
6177 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6178 | Build partial symbol tables for the .debug_types comp-units. */ | |
6179 | ||
6180 | static void | |
6181 | build_type_psymtabs (struct objfile *objfile) | |
6182 | { | |
0e50663e | 6183 | if (! create_all_type_units (objfile)) |
348e048f DE |
6184 | return; |
6185 | ||
73051182 | 6186 | build_type_psymtabs_1 (); |
f4dc4d17 DE |
6187 | |
6188 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6189 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6190 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
6191 | } |
6192 | ||
60606b2c TT |
6193 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6194 | ||
6195 | static void | |
6196 | psymtabs_addrmap_cleanup (void *o) | |
6197 | { | |
6198 | struct objfile *objfile = o; | |
ec61707d | 6199 | |
60606b2c TT |
6200 | objfile->psymtabs_addrmap = NULL; |
6201 | } | |
6202 | ||
95554aad TT |
6203 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6204 | ||
6205 | static void | |
6206 | set_partial_user (struct objfile *objfile) | |
6207 | { | |
6208 | int i; | |
6209 | ||
6210 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6211 | { | |
8832e7e3 | 6212 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6213 | struct partial_symtab *pst = per_cu->v.psymtab; |
6214 | int j; | |
6215 | ||
36586728 TT |
6216 | if (pst == NULL) |
6217 | continue; | |
6218 | ||
95554aad TT |
6219 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6220 | { | |
6221 | /* Set the 'user' field only if it is not already set. */ | |
6222 | if (pst->dependencies[j]->user == NULL) | |
6223 | pst->dependencies[j]->user = pst; | |
6224 | } | |
6225 | } | |
6226 | } | |
6227 | ||
93311388 DE |
6228 | /* Build the partial symbol table by doing a quick pass through the |
6229 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6230 | |
93311388 | 6231 | static void |
c67a9c90 | 6232 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6233 | { |
60606b2c TT |
6234 | struct cleanup *back_to, *addrmap_cleanup; |
6235 | struct obstack temp_obstack; | |
21b2bd31 | 6236 | int i; |
93311388 | 6237 | |
45cfd468 DE |
6238 | if (dwarf2_read_debug) |
6239 | { | |
6240 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6241 | objfile_name (objfile)); |
45cfd468 DE |
6242 | } |
6243 | ||
98bfdba5 PA |
6244 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6245 | ||
be391dca | 6246 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6247 | |
93311388 DE |
6248 | /* Any cached compilation units will be linked by the per-objfile |
6249 | read_in_chain. Make sure to free them when we're done. */ | |
6250 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6251 | |
348e048f DE |
6252 | build_type_psymtabs (objfile); |
6253 | ||
93311388 | 6254 | create_all_comp_units (objfile); |
c906108c | 6255 | |
60606b2c TT |
6256 | /* Create a temporary address map on a temporary obstack. We later |
6257 | copy this to the final obstack. */ | |
6258 | obstack_init (&temp_obstack); | |
6259 | make_cleanup_obstack_free (&temp_obstack); | |
6260 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6261 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6262 | |
21b2bd31 | 6263 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6264 | { |
8832e7e3 | 6265 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6266 | |
b93601f3 | 6267 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6268 | } |
ff013f42 | 6269 | |
95554aad TT |
6270 | set_partial_user (objfile); |
6271 | ||
ff013f42 JK |
6272 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6273 | &objfile->objfile_obstack); | |
60606b2c | 6274 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6275 | |
ae038cb0 | 6276 | do_cleanups (back_to); |
45cfd468 DE |
6277 | |
6278 | if (dwarf2_read_debug) | |
6279 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
4262abfb | 6280 | objfile_name (objfile)); |
ae038cb0 DJ |
6281 | } |
6282 | ||
3019eac3 | 6283 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6284 | |
6285 | static void | |
dee91e82 | 6286 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6287 | const gdb_byte *info_ptr, |
dee91e82 DE |
6288 | struct die_info *comp_unit_die, |
6289 | int has_children, | |
6290 | void *data) | |
ae038cb0 | 6291 | { |
dee91e82 | 6292 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6293 | |
95554aad | 6294 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6295 | |
ae038cb0 DJ |
6296 | /* Check if comp unit has_children. |
6297 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6298 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6299 | if (has_children) |
dee91e82 DE |
6300 | load_partial_dies (reader, info_ptr, 0); |
6301 | } | |
98bfdba5 | 6302 | |
dee91e82 DE |
6303 | /* Load the partial DIEs for a secondary CU into memory. |
6304 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6305 | |
dee91e82 DE |
6306 | static void |
6307 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6308 | { | |
f4dc4d17 DE |
6309 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6310 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6311 | } |
6312 | ||
ae038cb0 | 6313 | static void |
36586728 TT |
6314 | read_comp_units_from_section (struct objfile *objfile, |
6315 | struct dwarf2_section_info *section, | |
6316 | unsigned int is_dwz, | |
6317 | int *n_allocated, | |
6318 | int *n_comp_units, | |
6319 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6320 | { |
d521ce57 | 6321 | const gdb_byte *info_ptr; |
a32a8923 | 6322 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6323 | |
bf6af496 DE |
6324 | if (dwarf2_read_debug) |
6325 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", | |
a32a8923 DE |
6326 | get_section_name (section), |
6327 | get_section_file_name (section)); | |
bf6af496 | 6328 | |
36586728 | 6329 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6330 | |
36586728 | 6331 | info_ptr = section->buffer; |
6e70227d | 6332 | |
36586728 | 6333 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6334 | { |
c764a876 | 6335 | unsigned int length, initial_length_size; |
ae038cb0 | 6336 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6337 | sect_offset offset; |
ae038cb0 | 6338 | |
36586728 | 6339 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6340 | |
6341 | /* Read just enough information to find out where the next | |
6342 | compilation unit is. */ | |
36586728 | 6343 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6344 | |
6345 | /* Save the compilation unit for later lookup. */ | |
6346 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
6347 | sizeof (struct dwarf2_per_cu_data)); | |
6348 | memset (this_cu, 0, sizeof (*this_cu)); | |
6349 | this_cu->offset = offset; | |
c764a876 | 6350 | this_cu->length = length + initial_length_size; |
36586728 | 6351 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6352 | this_cu->objfile = objfile; |
8a0459fd | 6353 | this_cu->section = section; |
ae038cb0 | 6354 | |
36586728 | 6355 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6356 | { |
36586728 TT |
6357 | *n_allocated *= 2; |
6358 | *all_comp_units = xrealloc (*all_comp_units, | |
6359 | *n_allocated | |
6360 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 6361 | } |
36586728 TT |
6362 | (*all_comp_units)[*n_comp_units] = this_cu; |
6363 | ++*n_comp_units; | |
ae038cb0 DJ |
6364 | |
6365 | info_ptr = info_ptr + this_cu->length; | |
6366 | } | |
36586728 TT |
6367 | } |
6368 | ||
6369 | /* Create a list of all compilation units in OBJFILE. | |
6370 | This is only done for -readnow and building partial symtabs. */ | |
6371 | ||
6372 | static void | |
6373 | create_all_comp_units (struct objfile *objfile) | |
6374 | { | |
6375 | int n_allocated; | |
6376 | int n_comp_units; | |
6377 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6378 | struct dwz_file *dwz; |
36586728 TT |
6379 | |
6380 | n_comp_units = 0; | |
6381 | n_allocated = 10; | |
6382 | all_comp_units = xmalloc (n_allocated | |
6383 | * sizeof (struct dwarf2_per_cu_data *)); | |
6384 | ||
6385 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6386 | &n_allocated, &n_comp_units, &all_comp_units); | |
6387 | ||
4db1a1dc TT |
6388 | dwz = dwarf2_get_dwz_file (); |
6389 | if (dwz != NULL) | |
6390 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6391 | &n_allocated, &n_comp_units, | |
6392 | &all_comp_units); | |
ae038cb0 DJ |
6393 | |
6394 | dwarf2_per_objfile->all_comp_units | |
6395 | = obstack_alloc (&objfile->objfile_obstack, | |
6396 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6397 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
6398 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6399 | xfree (all_comp_units); | |
6400 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6401 | } |
6402 | ||
5734ee8b DJ |
6403 | /* Process all loaded DIEs for compilation unit CU, starting at |
6404 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
6405 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
6406 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
6407 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
6408 | and record the covered ranges in the addrmap. */ | |
c906108c | 6409 | |
72bf9492 DJ |
6410 | static void |
6411 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 6412 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 6413 | { |
72bf9492 | 6414 | struct partial_die_info *pdi; |
c906108c | 6415 | |
91c24f0a DC |
6416 | /* Now, march along the PDI's, descending into ones which have |
6417 | interesting children but skipping the children of the other ones, | |
6418 | until we reach the end of the compilation unit. */ | |
c906108c | 6419 | |
72bf9492 | 6420 | pdi = first_die; |
91c24f0a | 6421 | |
72bf9492 DJ |
6422 | while (pdi != NULL) |
6423 | { | |
6424 | fixup_partial_die (pdi, cu); | |
c906108c | 6425 | |
f55ee35c | 6426 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6427 | children, so we need to look at them. Ditto for anonymous |
6428 | enums. */ | |
933c6fe4 | 6429 | |
72bf9492 | 6430 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6431 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6432 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6433 | { |
72bf9492 | 6434 | switch (pdi->tag) |
c906108c SS |
6435 | { |
6436 | case DW_TAG_subprogram: | |
5734ee8b | 6437 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 6438 | break; |
72929c62 | 6439 | case DW_TAG_constant: |
c906108c SS |
6440 | case DW_TAG_variable: |
6441 | case DW_TAG_typedef: | |
91c24f0a | 6442 | case DW_TAG_union_type: |
72bf9492 | 6443 | if (!pdi->is_declaration) |
63d06c5c | 6444 | { |
72bf9492 | 6445 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6446 | } |
6447 | break; | |
c906108c | 6448 | case DW_TAG_class_type: |
680b30c7 | 6449 | case DW_TAG_interface_type: |
c906108c | 6450 | case DW_TAG_structure_type: |
72bf9492 | 6451 | if (!pdi->is_declaration) |
c906108c | 6452 | { |
72bf9492 | 6453 | add_partial_symbol (pdi, cu); |
c906108c SS |
6454 | } |
6455 | break; | |
91c24f0a | 6456 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6457 | if (!pdi->is_declaration) |
6458 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6459 | break; |
6460 | case DW_TAG_base_type: | |
a02abb62 | 6461 | case DW_TAG_subrange_type: |
c906108c | 6462 | /* File scope base type definitions are added to the partial |
c5aa993b | 6463 | symbol table. */ |
72bf9492 | 6464 | add_partial_symbol (pdi, cu); |
c906108c | 6465 | break; |
d9fa45fe | 6466 | case DW_TAG_namespace: |
5734ee8b | 6467 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 6468 | break; |
5d7cb8df JK |
6469 | case DW_TAG_module: |
6470 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
6471 | break; | |
95554aad TT |
6472 | case DW_TAG_imported_unit: |
6473 | { | |
6474 | struct dwarf2_per_cu_data *per_cu; | |
6475 | ||
f4dc4d17 DE |
6476 | /* For now we don't handle imported units in type units. */ |
6477 | if (cu->per_cu->is_debug_types) | |
6478 | { | |
6479 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6480 | " supported in type units [in module %s]"), | |
4262abfb | 6481 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6482 | } |
6483 | ||
95554aad | 6484 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6485 | pdi->is_dwz, |
95554aad TT |
6486 | cu->objfile); |
6487 | ||
6488 | /* Go read the partial unit, if needed. */ | |
6489 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6490 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6491 | |
f4dc4d17 | 6492 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6493 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6494 | } |
6495 | break; | |
74921315 KS |
6496 | case DW_TAG_imported_declaration: |
6497 | add_partial_symbol (pdi, cu); | |
6498 | break; | |
c906108c SS |
6499 | default: |
6500 | break; | |
6501 | } | |
6502 | } | |
6503 | ||
72bf9492 DJ |
6504 | /* If the die has a sibling, skip to the sibling. */ |
6505 | ||
6506 | pdi = pdi->die_sibling; | |
6507 | } | |
6508 | } | |
6509 | ||
6510 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6511 | |
72bf9492 | 6512 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
6513 | name is concatenated with "::" and the partial DIE's name. For |
6514 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
6515 | Enumerators are an exception; they use the scope of their parent |
6516 | enumeration type, i.e. the name of the enumeration type is not | |
6517 | prepended to the enumerator. | |
91c24f0a | 6518 | |
72bf9492 DJ |
6519 | There are two complexities. One is DW_AT_specification; in this |
6520 | case "parent" means the parent of the target of the specification, | |
6521 | instead of the direct parent of the DIE. The other is compilers | |
6522 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6523 | the fully qualified name of structure types from their members' | |
6524 | linkage names. This must be done using the DIE's children rather | |
6525 | than the children of any DW_AT_specification target. We only need | |
6526 | to do this for structures at the top level, i.e. if the target of | |
6527 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6528 | have a parent. */ | |
6529 | ||
6530 | /* Compute the scope prefix associated with PDI's parent, in | |
6531 | compilation unit CU. The result will be allocated on CU's | |
6532 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6533 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6534 | static const char * |
72bf9492 DJ |
6535 | partial_die_parent_scope (struct partial_die_info *pdi, |
6536 | struct dwarf2_cu *cu) | |
6537 | { | |
15d034d0 | 6538 | const char *grandparent_scope; |
72bf9492 | 6539 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6540 | |
72bf9492 DJ |
6541 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6542 | then this means the parent of the specification DIE. */ | |
6543 | ||
6544 | real_pdi = pdi; | |
72bf9492 | 6545 | while (real_pdi->has_specification) |
36586728 TT |
6546 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6547 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6548 | |
6549 | parent = real_pdi->die_parent; | |
6550 | if (parent == NULL) | |
6551 | return NULL; | |
6552 | ||
6553 | if (parent->scope_set) | |
6554 | return parent->scope; | |
6555 | ||
6556 | fixup_partial_die (parent, cu); | |
6557 | ||
10b3939b | 6558 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6559 | |
acebe513 UW |
6560 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6561 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6562 | Work around this problem here. */ | |
6563 | if (cu->language == language_cplus | |
6e70227d | 6564 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6565 | && strcmp (parent->name, "::") == 0 |
6566 | && grandparent_scope == NULL) | |
6567 | { | |
6568 | parent->scope = NULL; | |
6569 | parent->scope_set = 1; | |
6570 | return NULL; | |
6571 | } | |
6572 | ||
9c6c53f7 SA |
6573 | if (pdi->tag == DW_TAG_enumerator) |
6574 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6575 | parent->scope = grandparent_scope; | |
6576 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6577 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6578 | || parent->tag == DW_TAG_structure_type |
6579 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6580 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6581 | || parent->tag == DW_TAG_union_type |
6582 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6583 | { |
6584 | if (grandparent_scope == NULL) | |
6585 | parent->scope = parent->name; | |
6586 | else | |
3e43a32a MS |
6587 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6588 | grandparent_scope, | |
f55ee35c | 6589 | parent->name, 0, cu); |
72bf9492 | 6590 | } |
72bf9492 DJ |
6591 | else |
6592 | { | |
6593 | /* FIXME drow/2004-04-01: What should we be doing with | |
6594 | function-local names? For partial symbols, we should probably be | |
6595 | ignoring them. */ | |
6596 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6597 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6598 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6599 | parent->scope = grandparent_scope; |
c906108c SS |
6600 | } |
6601 | ||
72bf9492 DJ |
6602 | parent->scope_set = 1; |
6603 | return parent->scope; | |
6604 | } | |
6605 | ||
6606 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6607 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6608 | |
72bf9492 DJ |
6609 | static char * |
6610 | partial_die_full_name (struct partial_die_info *pdi, | |
6611 | struct dwarf2_cu *cu) | |
6612 | { | |
15d034d0 | 6613 | const char *parent_scope; |
72bf9492 | 6614 | |
98bfdba5 PA |
6615 | /* If this is a template instantiation, we can not work out the |
6616 | template arguments from partial DIEs. So, unfortunately, we have | |
6617 | to go through the full DIEs. At least any work we do building | |
6618 | types here will be reused if full symbols are loaded later. */ | |
6619 | if (pdi->has_template_arguments) | |
6620 | { | |
6621 | fixup_partial_die (pdi, cu); | |
6622 | ||
6623 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6624 | { | |
6625 | struct die_info *die; | |
6626 | struct attribute attr; | |
6627 | struct dwarf2_cu *ref_cu = cu; | |
6628 | ||
b64f50a1 | 6629 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
6630 | attr.name = 0; |
6631 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 6632 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6633 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6634 | ||
6635 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6636 | } | |
6637 | } | |
6638 | ||
72bf9492 DJ |
6639 | parent_scope = partial_die_parent_scope (pdi, cu); |
6640 | if (parent_scope == NULL) | |
6641 | return NULL; | |
6642 | else | |
f55ee35c | 6643 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6644 | } |
6645 | ||
6646 | static void | |
72bf9492 | 6647 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6648 | { |
e7c27a73 | 6649 | struct objfile *objfile = cu->objfile; |
c906108c | 6650 | CORE_ADDR addr = 0; |
15d034d0 | 6651 | const char *actual_name = NULL; |
e142c38c | 6652 | CORE_ADDR baseaddr; |
15d034d0 | 6653 | char *built_actual_name; |
e142c38c DJ |
6654 | |
6655 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6656 | |
15d034d0 TT |
6657 | built_actual_name = partial_die_full_name (pdi, cu); |
6658 | if (built_actual_name != NULL) | |
6659 | actual_name = built_actual_name; | |
63d06c5c | 6660 | |
72bf9492 DJ |
6661 | if (actual_name == NULL) |
6662 | actual_name = pdi->name; | |
6663 | ||
c906108c SS |
6664 | switch (pdi->tag) |
6665 | { | |
6666 | case DW_TAG_subprogram: | |
2cfa0c8d | 6667 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6668 | { |
2cfa0c8d JB |
6669 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6670 | of the global scope. But in Ada, we want to be able to access | |
6671 | nested procedures globally. So all Ada subprograms are stored | |
6672 | in the global scope. */ | |
f47fb265 | 6673 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6674 | mst_text, objfile); */ |
f47fb265 | 6675 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6676 | built_actual_name != NULL, |
f47fb265 MS |
6677 | VAR_DOMAIN, LOC_BLOCK, |
6678 | &objfile->global_psymbols, | |
6679 | 0, pdi->lowpc + baseaddr, | |
6680 | cu->language, objfile); | |
c906108c SS |
6681 | } |
6682 | else | |
6683 | { | |
f47fb265 | 6684 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6685 | mst_file_text, objfile); */ |
f47fb265 | 6686 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6687 | built_actual_name != NULL, |
f47fb265 MS |
6688 | VAR_DOMAIN, LOC_BLOCK, |
6689 | &objfile->static_psymbols, | |
6690 | 0, pdi->lowpc + baseaddr, | |
6691 | cu->language, objfile); | |
c906108c SS |
6692 | } |
6693 | break; | |
72929c62 JB |
6694 | case DW_TAG_constant: |
6695 | { | |
6696 | struct psymbol_allocation_list *list; | |
6697 | ||
6698 | if (pdi->is_external) | |
6699 | list = &objfile->global_psymbols; | |
6700 | else | |
6701 | list = &objfile->static_psymbols; | |
f47fb265 | 6702 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6703 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
f47fb265 | 6704 | list, 0, 0, cu->language, objfile); |
72929c62 JB |
6705 | } |
6706 | break; | |
c906108c | 6707 | case DW_TAG_variable: |
95554aad TT |
6708 | if (pdi->d.locdesc) |
6709 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6710 | |
95554aad | 6711 | if (pdi->d.locdesc |
caac4577 JG |
6712 | && addr == 0 |
6713 | && !dwarf2_per_objfile->has_section_at_zero) | |
6714 | { | |
6715 | /* A global or static variable may also have been stripped | |
6716 | out by the linker if unused, in which case its address | |
6717 | will be nullified; do not add such variables into partial | |
6718 | symbol table then. */ | |
6719 | } | |
6720 | else if (pdi->is_external) | |
c906108c SS |
6721 | { |
6722 | /* Global Variable. | |
6723 | Don't enter into the minimal symbol tables as there is | |
6724 | a minimal symbol table entry from the ELF symbols already. | |
6725 | Enter into partial symbol table if it has a location | |
6726 | descriptor or a type. | |
6727 | If the location descriptor is missing, new_symbol will create | |
6728 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6729 | be determined from the minimal symbol table whenever the variable | |
6730 | is referenced. | |
6731 | The address for the partial symbol table entry is not | |
6732 | used by GDB, but it comes in handy for debugging partial symbol | |
6733 | table building. */ | |
6734 | ||
95554aad | 6735 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6736 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6737 | built_actual_name != NULL, |
f47fb265 MS |
6738 | VAR_DOMAIN, LOC_STATIC, |
6739 | &objfile->global_psymbols, | |
6740 | 0, addr + baseaddr, | |
6741 | cu->language, objfile); | |
c906108c SS |
6742 | } |
6743 | else | |
6744 | { | |
0963b4bd | 6745 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 6746 | if (pdi->d.locdesc == NULL) |
decbce07 | 6747 | { |
15d034d0 | 6748 | xfree (built_actual_name); |
decbce07 MS |
6749 | return; |
6750 | } | |
f47fb265 | 6751 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 6752 | mst_file_data, objfile); */ |
f47fb265 | 6753 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6754 | built_actual_name != NULL, |
f47fb265 MS |
6755 | VAR_DOMAIN, LOC_STATIC, |
6756 | &objfile->static_psymbols, | |
6757 | 0, addr + baseaddr, | |
6758 | cu->language, objfile); | |
c906108c SS |
6759 | } |
6760 | break; | |
6761 | case DW_TAG_typedef: | |
6762 | case DW_TAG_base_type: | |
a02abb62 | 6763 | case DW_TAG_subrange_type: |
38d518c9 | 6764 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6765 | built_actual_name != NULL, |
176620f1 | 6766 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6767 | &objfile->static_psymbols, |
e142c38c | 6768 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6769 | break; |
74921315 | 6770 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
6771 | case DW_TAG_namespace: |
6772 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6773 | built_actual_name != NULL, |
72bf9492 DJ |
6774 | VAR_DOMAIN, LOC_TYPEDEF, |
6775 | &objfile->global_psymbols, | |
6776 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6777 | break; | |
530e8392 KB |
6778 | case DW_TAG_module: |
6779 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
6780 | built_actual_name != NULL, | |
6781 | MODULE_DOMAIN, LOC_TYPEDEF, | |
6782 | &objfile->global_psymbols, | |
6783 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6784 | break; | |
c906108c | 6785 | case DW_TAG_class_type: |
680b30c7 | 6786 | case DW_TAG_interface_type: |
c906108c SS |
6787 | case DW_TAG_structure_type: |
6788 | case DW_TAG_union_type: | |
6789 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
6790 | /* Skip external references. The DWARF standard says in the section |
6791 | about "Structure, Union, and Class Type Entries": "An incomplete | |
6792 | structure, union or class type is represented by a structure, | |
6793 | union or class entry that does not have a byte size attribute | |
6794 | and that has a DW_AT_declaration attribute." */ | |
6795 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 6796 | { |
15d034d0 | 6797 | xfree (built_actual_name); |
decbce07 MS |
6798 | return; |
6799 | } | |
fa4028e9 | 6800 | |
63d06c5c DC |
6801 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
6802 | static vs. global. */ | |
38d518c9 | 6803 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6804 | built_actual_name != NULL, |
176620f1 | 6805 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
6806 | (cu->language == language_cplus |
6807 | || cu->language == language_java) | |
63d06c5c DC |
6808 | ? &objfile->global_psymbols |
6809 | : &objfile->static_psymbols, | |
e142c38c | 6810 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6811 | |
c906108c SS |
6812 | break; |
6813 | case DW_TAG_enumerator: | |
38d518c9 | 6814 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6815 | built_actual_name != NULL, |
176620f1 | 6816 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
6817 | (cu->language == language_cplus |
6818 | || cu->language == language_java) | |
f6fe98ef DJ |
6819 | ? &objfile->global_psymbols |
6820 | : &objfile->static_psymbols, | |
e142c38c | 6821 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
6822 | break; |
6823 | default: | |
6824 | break; | |
6825 | } | |
5c4e30ca | 6826 | |
15d034d0 | 6827 | xfree (built_actual_name); |
c906108c SS |
6828 | } |
6829 | ||
5c4e30ca DC |
6830 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6831 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6832 | the name of the enclosing namespace. */ | |
91c24f0a | 6833 | |
72bf9492 DJ |
6834 | static void |
6835 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6836 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6837 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6838 | { |
72bf9492 | 6839 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6840 | |
72bf9492 | 6841 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6842 | |
6843 | /* Now scan partial symbols in that namespace. */ | |
6844 | ||
91c24f0a | 6845 | if (pdi->has_children) |
5734ee8b | 6846 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6847 | } |
6848 | ||
5d7cb8df JK |
6849 | /* Read a partial die corresponding to a Fortran module. */ |
6850 | ||
6851 | static void | |
6852 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6853 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6854 | { | |
530e8392 KB |
6855 | /* Add a symbol for the namespace. */ |
6856 | ||
6857 | add_partial_symbol (pdi, cu); | |
6858 | ||
f55ee35c | 6859 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6860 | |
6861 | if (pdi->has_children) | |
6862 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6863 | } | |
6864 | ||
bc30ff58 JB |
6865 | /* Read a partial die corresponding to a subprogram and create a partial |
6866 | symbol for that subprogram. When the CU language allows it, this | |
6867 | routine also defines a partial symbol for each nested subprogram | |
6868 | that this subprogram contains. | |
6e70227d | 6869 | |
bc30ff58 JB |
6870 | DIE my also be a lexical block, in which case we simply search |
6871 | recursively for suprograms defined inside that lexical block. | |
6872 | Again, this is only performed when the CU language allows this | |
6873 | type of definitions. */ | |
6874 | ||
6875 | static void | |
6876 | add_partial_subprogram (struct partial_die_info *pdi, | |
6877 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6878 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6879 | { |
6880 | if (pdi->tag == DW_TAG_subprogram) | |
6881 | { | |
6882 | if (pdi->has_pc_info) | |
6883 | { | |
6884 | if (pdi->lowpc < *lowpc) | |
6885 | *lowpc = pdi->lowpc; | |
6886 | if (pdi->highpc > *highpc) | |
6887 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6888 | if (need_pc) |
6889 | { | |
6890 | CORE_ADDR baseaddr; | |
6891 | struct objfile *objfile = cu->objfile; | |
6892 | ||
6893 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6894 | SECT_OFF_TEXT (objfile)); | |
6895 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6896 | pdi->lowpc + baseaddr, |
6897 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6898 | cu->per_cu->v.psymtab); |
5734ee8b | 6899 | } |
481860b3 GB |
6900 | } |
6901 | ||
6902 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6903 | { | |
bc30ff58 | 6904 | if (!pdi->is_declaration) |
e8d05480 JB |
6905 | /* Ignore subprogram DIEs that do not have a name, they are |
6906 | illegal. Do not emit a complaint at this point, we will | |
6907 | do so when we convert this psymtab into a symtab. */ | |
6908 | if (pdi->name) | |
6909 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6910 | } |
6911 | } | |
6e70227d | 6912 | |
bc30ff58 JB |
6913 | if (! pdi->has_children) |
6914 | return; | |
6915 | ||
6916 | if (cu->language == language_ada) | |
6917 | { | |
6918 | pdi = pdi->die_child; | |
6919 | while (pdi != NULL) | |
6920 | { | |
6921 | fixup_partial_die (pdi, cu); | |
6922 | if (pdi->tag == DW_TAG_subprogram | |
6923 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6924 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6925 | pdi = pdi->die_sibling; |
6926 | } | |
6927 | } | |
6928 | } | |
6929 | ||
91c24f0a DC |
6930 | /* Read a partial die corresponding to an enumeration type. */ |
6931 | ||
72bf9492 DJ |
6932 | static void |
6933 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6934 | struct dwarf2_cu *cu) | |
91c24f0a | 6935 | { |
72bf9492 | 6936 | struct partial_die_info *pdi; |
91c24f0a DC |
6937 | |
6938 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6939 | add_partial_symbol (enum_pdi, cu); |
6940 | ||
6941 | pdi = enum_pdi->die_child; | |
6942 | while (pdi) | |
91c24f0a | 6943 | { |
72bf9492 | 6944 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 6945 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 6946 | else |
72bf9492 DJ |
6947 | add_partial_symbol (pdi, cu); |
6948 | pdi = pdi->die_sibling; | |
91c24f0a | 6949 | } |
91c24f0a DC |
6950 | } |
6951 | ||
6caca83c CC |
6952 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
6953 | ||
6954 | static unsigned int | |
d521ce57 | 6955 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
6956 | { |
6957 | unsigned int bytes_read; | |
6958 | ||
6959 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6960 | } | |
6961 | ||
4bb7a0a7 DJ |
6962 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
6963 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
6964 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
6965 | the initial number. */ | |
6966 | ||
6967 | static struct abbrev_info * | |
d521ce57 | 6968 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 6969 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
6970 | { |
6971 | bfd *abfd = cu->objfile->obfd; | |
6972 | unsigned int abbrev_number; | |
6973 | struct abbrev_info *abbrev; | |
6974 | ||
6975 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
6976 | ||
6977 | if (abbrev_number == 0) | |
6978 | return NULL; | |
6979 | ||
433df2d4 | 6980 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
6981 | if (!abbrev) |
6982 | { | |
3e43a32a MS |
6983 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
6984 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
6985 | } |
6986 | ||
6987 | return abbrev; | |
6988 | } | |
6989 | ||
93311388 DE |
6990 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6991 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
6992 | DIE. Any children of the skipped DIEs will also be skipped. */ |
6993 | ||
d521ce57 TT |
6994 | static const gdb_byte * |
6995 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 6996 | { |
dee91e82 | 6997 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
6998 | struct abbrev_info *abbrev; |
6999 | unsigned int bytes_read; | |
7000 | ||
7001 | while (1) | |
7002 | { | |
7003 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7004 | if (abbrev == NULL) | |
7005 | return info_ptr + bytes_read; | |
7006 | else | |
dee91e82 | 7007 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7008 | } |
7009 | } | |
7010 | ||
93311388 DE |
7011 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7012 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7013 | abbrev corresponding to that skipped uleb128 should be passed in |
7014 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7015 | children. */ | |
7016 | ||
d521ce57 TT |
7017 | static const gdb_byte * |
7018 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7019 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7020 | { |
7021 | unsigned int bytes_read; | |
7022 | struct attribute attr; | |
dee91e82 DE |
7023 | bfd *abfd = reader->abfd; |
7024 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7025 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7026 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 7027 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
7028 | unsigned int form, i; |
7029 | ||
7030 | for (i = 0; i < abbrev->num_attrs; i++) | |
7031 | { | |
7032 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7033 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7034 | { | |
dee91e82 | 7035 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7036 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7037 | complaint (&symfile_complaints, |
7038 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7039 | else |
b9502d3f WN |
7040 | { |
7041 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
7042 | const gdb_byte *sibling_ptr = buffer + off; | |
7043 | ||
7044 | if (sibling_ptr < info_ptr) | |
7045 | complaint (&symfile_complaints, | |
7046 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7047 | else if (sibling_ptr > reader->buffer_end) |
7048 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7049 | else |
7050 | return sibling_ptr; | |
7051 | } | |
4bb7a0a7 DJ |
7052 | } |
7053 | ||
7054 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7055 | form = abbrev->attrs[i].form; | |
7056 | skip_attribute: | |
7057 | switch (form) | |
7058 | { | |
4bb7a0a7 | 7059 | case DW_FORM_ref_addr: |
ae411497 TT |
7060 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7061 | and later it is offset sized. */ | |
7062 | if (cu->header.version == 2) | |
7063 | info_ptr += cu->header.addr_size; | |
7064 | else | |
7065 | info_ptr += cu->header.offset_size; | |
7066 | break; | |
36586728 TT |
7067 | case DW_FORM_GNU_ref_alt: |
7068 | info_ptr += cu->header.offset_size; | |
7069 | break; | |
ae411497 | 7070 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7071 | info_ptr += cu->header.addr_size; |
7072 | break; | |
7073 | case DW_FORM_data1: | |
7074 | case DW_FORM_ref1: | |
7075 | case DW_FORM_flag: | |
7076 | info_ptr += 1; | |
7077 | break; | |
2dc7f7b3 TT |
7078 | case DW_FORM_flag_present: |
7079 | break; | |
4bb7a0a7 DJ |
7080 | case DW_FORM_data2: |
7081 | case DW_FORM_ref2: | |
7082 | info_ptr += 2; | |
7083 | break; | |
7084 | case DW_FORM_data4: | |
7085 | case DW_FORM_ref4: | |
7086 | info_ptr += 4; | |
7087 | break; | |
7088 | case DW_FORM_data8: | |
7089 | case DW_FORM_ref8: | |
55f1336d | 7090 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7091 | info_ptr += 8; |
7092 | break; | |
7093 | case DW_FORM_string: | |
9b1c24c8 | 7094 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7095 | info_ptr += bytes_read; |
7096 | break; | |
2dc7f7b3 | 7097 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7098 | case DW_FORM_strp: |
36586728 | 7099 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7100 | info_ptr += cu->header.offset_size; |
7101 | break; | |
2dc7f7b3 | 7102 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7103 | case DW_FORM_block: |
7104 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7105 | info_ptr += bytes_read; | |
7106 | break; | |
7107 | case DW_FORM_block1: | |
7108 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7109 | break; | |
7110 | case DW_FORM_block2: | |
7111 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7112 | break; | |
7113 | case DW_FORM_block4: | |
7114 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7115 | break; | |
7116 | case DW_FORM_sdata: | |
7117 | case DW_FORM_udata: | |
7118 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7119 | case DW_FORM_GNU_addr_index: |
7120 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7121 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7122 | break; |
7123 | case DW_FORM_indirect: | |
7124 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7125 | info_ptr += bytes_read; | |
7126 | /* We need to continue parsing from here, so just go back to | |
7127 | the top. */ | |
7128 | goto skip_attribute; | |
7129 | ||
7130 | default: | |
3e43a32a MS |
7131 | error (_("Dwarf Error: Cannot handle %s " |
7132 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7133 | dwarf_form_name (form), |
7134 | bfd_get_filename (abfd)); | |
7135 | } | |
7136 | } | |
7137 | ||
7138 | if (abbrev->has_children) | |
dee91e82 | 7139 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7140 | else |
7141 | return info_ptr; | |
7142 | } | |
7143 | ||
93311388 | 7144 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7145 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7146 | |
d521ce57 | 7147 | static const gdb_byte * |
dee91e82 DE |
7148 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7149 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7150 | const gdb_byte *info_ptr) |
91c24f0a DC |
7151 | { |
7152 | /* Do we know the sibling already? */ | |
72bf9492 | 7153 | |
91c24f0a DC |
7154 | if (orig_pdi->sibling) |
7155 | return orig_pdi->sibling; | |
7156 | ||
7157 | /* Are there any children to deal with? */ | |
7158 | ||
7159 | if (!orig_pdi->has_children) | |
7160 | return info_ptr; | |
7161 | ||
4bb7a0a7 | 7162 | /* Skip the children the long way. */ |
91c24f0a | 7163 | |
dee91e82 | 7164 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7165 | } |
7166 | ||
257e7a09 | 7167 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7168 | not NULL. */ |
c906108c SS |
7169 | |
7170 | static void | |
257e7a09 YQ |
7171 | dwarf2_read_symtab (struct partial_symtab *self, |
7172 | struct objfile *objfile) | |
c906108c | 7173 | { |
257e7a09 | 7174 | if (self->readin) |
c906108c | 7175 | { |
442e4d9c | 7176 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7177 | self->filename); |
442e4d9c YQ |
7178 | } |
7179 | else | |
7180 | { | |
7181 | if (info_verbose) | |
c906108c | 7182 | { |
442e4d9c | 7183 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7184 | self->filename); |
442e4d9c | 7185 | gdb_flush (gdb_stdout); |
c906108c | 7186 | } |
c906108c | 7187 | |
442e4d9c YQ |
7188 | /* Restore our global data. */ |
7189 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10b3939b | 7190 | |
442e4d9c YQ |
7191 | /* If this psymtab is constructed from a debug-only objfile, the |
7192 | has_section_at_zero flag will not necessarily be correct. We | |
7193 | can get the correct value for this flag by looking at the data | |
7194 | associated with the (presumably stripped) associated objfile. */ | |
7195 | if (objfile->separate_debug_objfile_backlink) | |
7196 | { | |
7197 | struct dwarf2_per_objfile *dpo_backlink | |
7198 | = objfile_data (objfile->separate_debug_objfile_backlink, | |
7199 | dwarf2_objfile_data_key); | |
9a619af0 | 7200 | |
442e4d9c YQ |
7201 | dwarf2_per_objfile->has_section_at_zero |
7202 | = dpo_backlink->has_section_at_zero; | |
7203 | } | |
b2ab525c | 7204 | |
442e4d9c | 7205 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7206 | |
257e7a09 | 7207 | psymtab_to_symtab_1 (self); |
c906108c | 7208 | |
442e4d9c YQ |
7209 | /* Finish up the debug error message. */ |
7210 | if (info_verbose) | |
7211 | printf_filtered (_("done.\n")); | |
c906108c | 7212 | } |
95554aad TT |
7213 | |
7214 | process_cu_includes (); | |
c906108c | 7215 | } |
9cdd5dbd DE |
7216 | \f |
7217 | /* Reading in full CUs. */ | |
c906108c | 7218 | |
10b3939b DJ |
7219 | /* Add PER_CU to the queue. */ |
7220 | ||
7221 | static void | |
95554aad TT |
7222 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7223 | enum language pretend_language) | |
10b3939b DJ |
7224 | { |
7225 | struct dwarf2_queue_item *item; | |
7226 | ||
7227 | per_cu->queued = 1; | |
7228 | item = xmalloc (sizeof (*item)); | |
7229 | item->per_cu = per_cu; | |
95554aad | 7230 | item->pretend_language = pretend_language; |
10b3939b DJ |
7231 | item->next = NULL; |
7232 | ||
7233 | if (dwarf2_queue == NULL) | |
7234 | dwarf2_queue = item; | |
7235 | else | |
7236 | dwarf2_queue_tail->next = item; | |
7237 | ||
7238 | dwarf2_queue_tail = item; | |
7239 | } | |
7240 | ||
89e63ee4 DE |
7241 | /* If PER_CU is not yet queued, add it to the queue. |
7242 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7243 | dependency. | |
0907af0c | 7244 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7245 | meaning either PER_CU is already queued or it is already loaded. |
7246 | ||
7247 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7248 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7249 | |
7250 | static int | |
89e63ee4 | 7251 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7252 | struct dwarf2_per_cu_data *per_cu, |
7253 | enum language pretend_language) | |
7254 | { | |
7255 | /* We may arrive here during partial symbol reading, if we need full | |
7256 | DIEs to process an unusual case (e.g. template arguments). Do | |
7257 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7258 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7259 | { | |
7260 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7261 | return 1; | |
7262 | return 0; | |
7263 | } | |
7264 | ||
7265 | /* Mark the dependence relation so that we don't flush PER_CU | |
7266 | too early. */ | |
89e63ee4 DE |
7267 | if (dependent_cu != NULL) |
7268 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7269 | |
7270 | /* If it's already on the queue, we have nothing to do. */ | |
7271 | if (per_cu->queued) | |
7272 | return 0; | |
7273 | ||
7274 | /* If the compilation unit is already loaded, just mark it as | |
7275 | used. */ | |
7276 | if (per_cu->cu != NULL) | |
7277 | { | |
7278 | per_cu->cu->last_used = 0; | |
7279 | return 0; | |
7280 | } | |
7281 | ||
7282 | /* Add it to the queue. */ | |
7283 | queue_comp_unit (per_cu, pretend_language); | |
7284 | ||
7285 | return 1; | |
7286 | } | |
7287 | ||
10b3939b DJ |
7288 | /* Process the queue. */ |
7289 | ||
7290 | static void | |
a0f42c21 | 7291 | process_queue (void) |
10b3939b DJ |
7292 | { |
7293 | struct dwarf2_queue_item *item, *next_item; | |
7294 | ||
45cfd468 DE |
7295 | if (dwarf2_read_debug) |
7296 | { | |
7297 | fprintf_unfiltered (gdb_stdlog, | |
7298 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7299 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7300 | } |
7301 | ||
03dd20cc DJ |
7302 | /* The queue starts out with one item, but following a DIE reference |
7303 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7304 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7305 | { | |
9291a0cd TT |
7306 | if (dwarf2_per_objfile->using_index |
7307 | ? !item->per_cu->v.quick->symtab | |
7308 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
7309 | { |
7310 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7311 | unsigned int debug_print_threshold; |
247f5c4f | 7312 | char buf[100]; |
f4dc4d17 | 7313 | |
247f5c4f | 7314 | if (per_cu->is_debug_types) |
f4dc4d17 | 7315 | { |
247f5c4f DE |
7316 | struct signatured_type *sig_type = |
7317 | (struct signatured_type *) per_cu; | |
7318 | ||
7319 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 DE |
7320 | hex_string (sig_type->signature), |
7321 | per_cu->offset.sect_off); | |
7322 | /* There can be 100s of TUs. | |
7323 | Only print them in verbose mode. */ | |
7324 | debug_print_threshold = 2; | |
f4dc4d17 | 7325 | } |
247f5c4f | 7326 | else |
73be47f5 DE |
7327 | { |
7328 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7329 | debug_print_threshold = 1; | |
7330 | } | |
247f5c4f | 7331 | |
73be47f5 | 7332 | if (dwarf2_read_debug >= debug_print_threshold) |
247f5c4f | 7333 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7334 | |
7335 | if (per_cu->is_debug_types) | |
7336 | process_full_type_unit (per_cu, item->pretend_language); | |
7337 | else | |
7338 | process_full_comp_unit (per_cu, item->pretend_language); | |
7339 | ||
73be47f5 | 7340 | if (dwarf2_read_debug >= debug_print_threshold) |
247f5c4f | 7341 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7342 | } |
10b3939b DJ |
7343 | |
7344 | item->per_cu->queued = 0; | |
7345 | next_item = item->next; | |
7346 | xfree (item); | |
7347 | } | |
7348 | ||
7349 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
7350 | |
7351 | if (dwarf2_read_debug) | |
7352 | { | |
7353 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7354 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7355 | } |
10b3939b DJ |
7356 | } |
7357 | ||
7358 | /* Free all allocated queue entries. This function only releases anything if | |
7359 | an error was thrown; if the queue was processed then it would have been | |
7360 | freed as we went along. */ | |
7361 | ||
7362 | static void | |
7363 | dwarf2_release_queue (void *dummy) | |
7364 | { | |
7365 | struct dwarf2_queue_item *item, *last; | |
7366 | ||
7367 | item = dwarf2_queue; | |
7368 | while (item) | |
7369 | { | |
7370 | /* Anything still marked queued is likely to be in an | |
7371 | inconsistent state, so discard it. */ | |
7372 | if (item->per_cu->queued) | |
7373 | { | |
7374 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7375 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7376 | item->per_cu->queued = 0; |
7377 | } | |
7378 | ||
7379 | last = item; | |
7380 | item = item->next; | |
7381 | xfree (last); | |
7382 | } | |
7383 | ||
7384 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7385 | } | |
7386 | ||
7387 | /* Read in full symbols for PST, and anything it depends on. */ | |
7388 | ||
c906108c | 7389 | static void |
fba45db2 | 7390 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7391 | { |
10b3939b | 7392 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7393 | int i; |
7394 | ||
95554aad TT |
7395 | if (pst->readin) |
7396 | return; | |
7397 | ||
aaa75496 | 7398 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7399 | if (!pst->dependencies[i]->readin |
7400 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7401 | { |
7402 | /* Inform about additional files that need to be read in. */ | |
7403 | if (info_verbose) | |
7404 | { | |
a3f17187 | 7405 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7406 | fputs_filtered (" ", gdb_stdout); |
7407 | wrap_here (""); | |
7408 | fputs_filtered ("and ", gdb_stdout); | |
7409 | wrap_here (""); | |
7410 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7411 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7412 | gdb_flush (gdb_stdout); |
7413 | } | |
7414 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7415 | } | |
7416 | ||
e38df1d0 | 7417 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
7418 | |
7419 | if (per_cu == NULL) | |
aaa75496 JB |
7420 | { |
7421 | /* It's an include file, no symbols to read for it. | |
7422 | Everything is in the parent symtab. */ | |
7423 | pst->readin = 1; | |
7424 | return; | |
7425 | } | |
c906108c | 7426 | |
a0f42c21 | 7427 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7428 | } |
7429 | ||
dee91e82 DE |
7430 | /* Trivial hash function for die_info: the hash value of a DIE |
7431 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7432 | |
dee91e82 DE |
7433 | static hashval_t |
7434 | die_hash (const void *item) | |
10b3939b | 7435 | { |
dee91e82 | 7436 | const struct die_info *die = item; |
6502dd73 | 7437 | |
dee91e82 DE |
7438 | return die->offset.sect_off; |
7439 | } | |
63d06c5c | 7440 | |
dee91e82 DE |
7441 | /* Trivial comparison function for die_info structures: two DIEs |
7442 | are equal if they have the same offset. */ | |
98bfdba5 | 7443 | |
dee91e82 DE |
7444 | static int |
7445 | die_eq (const void *item_lhs, const void *item_rhs) | |
7446 | { | |
7447 | const struct die_info *die_lhs = item_lhs; | |
7448 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 7449 | |
dee91e82 DE |
7450 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7451 | } | |
c906108c | 7452 | |
dee91e82 DE |
7453 | /* die_reader_func for load_full_comp_unit. |
7454 | This is identical to read_signatured_type_reader, | |
7455 | but is kept separate for now. */ | |
c906108c | 7456 | |
dee91e82 DE |
7457 | static void |
7458 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7459 | const gdb_byte *info_ptr, |
dee91e82 DE |
7460 | struct die_info *comp_unit_die, |
7461 | int has_children, | |
7462 | void *data) | |
7463 | { | |
7464 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 7465 | enum language *language_ptr = data; |
6caca83c | 7466 | |
dee91e82 DE |
7467 | gdb_assert (cu->die_hash == NULL); |
7468 | cu->die_hash = | |
7469 | htab_create_alloc_ex (cu->header.length / 12, | |
7470 | die_hash, | |
7471 | die_eq, | |
7472 | NULL, | |
7473 | &cu->comp_unit_obstack, | |
7474 | hashtab_obstack_allocate, | |
7475 | dummy_obstack_deallocate); | |
e142c38c | 7476 | |
dee91e82 DE |
7477 | if (has_children) |
7478 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7479 | &info_ptr, comp_unit_die); | |
7480 | cu->dies = comp_unit_die; | |
7481 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7482 | |
7483 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7484 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7485 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7486 | or we won't be able to build types correctly. |
7487 | Similarly, if we do not read the producer, we can not apply | |
7488 | producer-specific interpretation. */ | |
95554aad | 7489 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7490 | } |
10b3939b | 7491 | |
dee91e82 | 7492 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7493 | |
dee91e82 | 7494 | static void |
95554aad TT |
7495 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7496 | enum language pretend_language) | |
dee91e82 | 7497 | { |
3019eac3 | 7498 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7499 | |
f4dc4d17 DE |
7500 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7501 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7502 | } |
7503 | ||
3da10d80 KS |
7504 | /* Add a DIE to the delayed physname list. */ |
7505 | ||
7506 | static void | |
7507 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7508 | const char *name, struct die_info *die, | |
7509 | struct dwarf2_cu *cu) | |
7510 | { | |
7511 | struct delayed_method_info mi; | |
7512 | mi.type = type; | |
7513 | mi.fnfield_index = fnfield_index; | |
7514 | mi.index = index; | |
7515 | mi.name = name; | |
7516 | mi.die = die; | |
7517 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7518 | } | |
7519 | ||
7520 | /* A cleanup for freeing the delayed method list. */ | |
7521 | ||
7522 | static void | |
7523 | free_delayed_list (void *ptr) | |
7524 | { | |
7525 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7526 | if (cu->method_list != NULL) | |
7527 | { | |
7528 | VEC_free (delayed_method_info, cu->method_list); | |
7529 | cu->method_list = NULL; | |
7530 | } | |
7531 | } | |
7532 | ||
7533 | /* Compute the physnames of any methods on the CU's method list. | |
7534 | ||
7535 | The computation of method physnames is delayed in order to avoid the | |
7536 | (bad) condition that one of the method's formal parameters is of an as yet | |
7537 | incomplete type. */ | |
7538 | ||
7539 | static void | |
7540 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7541 | { | |
7542 | int i; | |
7543 | struct delayed_method_info *mi; | |
7544 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7545 | { | |
1d06ead6 | 7546 | const char *physname; |
3da10d80 KS |
7547 | struct fn_fieldlist *fn_flp |
7548 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7549 | physname = dwarf2_physname (mi->name, mi->die, cu); |
3da10d80 KS |
7550 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
7551 | } | |
7552 | } | |
7553 | ||
a766d390 DE |
7554 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7555 | and it's not clear if/how imported objects will appear. | |
7556 | To keep Go support simple until that's worked out, | |
7557 | go back through what we've read and create something usable. | |
7558 | We could do this while processing each DIE, and feels kinda cleaner, | |
7559 | but that way is more invasive. | |
7560 | This is to, for example, allow the user to type "p var" or "b main" | |
7561 | without having to specify the package name, and allow lookups | |
7562 | of module.object to work in contexts that use the expression | |
7563 | parser. */ | |
7564 | ||
7565 | static void | |
7566 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7567 | { | |
7568 | char *package_name = NULL; | |
7569 | struct pending *list; | |
7570 | int i; | |
7571 | ||
7572 | for (list = global_symbols; list != NULL; list = list->next) | |
7573 | { | |
7574 | for (i = 0; i < list->nsyms; ++i) | |
7575 | { | |
7576 | struct symbol *sym = list->symbol[i]; | |
7577 | ||
7578 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7579 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7580 | { | |
7581 | char *this_package_name = go_symbol_package_name (sym); | |
7582 | ||
7583 | if (this_package_name == NULL) | |
7584 | continue; | |
7585 | if (package_name == NULL) | |
7586 | package_name = this_package_name; | |
7587 | else | |
7588 | { | |
7589 | if (strcmp (package_name, this_package_name) != 0) | |
7590 | complaint (&symfile_complaints, | |
7591 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 7592 | (SYMBOL_SYMTAB (sym) |
05cba821 | 7593 | ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym)) |
4262abfb | 7594 | : objfile_name (cu->objfile)), |
a766d390 DE |
7595 | this_package_name, package_name); |
7596 | xfree (this_package_name); | |
7597 | } | |
7598 | } | |
7599 | } | |
7600 | } | |
7601 | ||
7602 | if (package_name != NULL) | |
7603 | { | |
7604 | struct objfile *objfile = cu->objfile; | |
10f0c4bb TT |
7605 | const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack, |
7606 | package_name, | |
7607 | strlen (package_name)); | |
a766d390 | 7608 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 7609 | saved_package_name, objfile); |
a766d390 DE |
7610 | struct symbol *sym; |
7611 | ||
7612 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7613 | ||
e623cf5d | 7614 | sym = allocate_symbol (objfile); |
f85f34ed | 7615 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7616 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7617 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7618 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7619 | e.g., "main" finds the "main" module and not C's main(). */ | |
7620 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7621 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7622 | SYMBOL_TYPE (sym) = type; |
7623 | ||
7624 | add_symbol_to_list (sym, &global_symbols); | |
7625 | ||
7626 | xfree (package_name); | |
7627 | } | |
7628 | } | |
7629 | ||
95554aad TT |
7630 | /* Return the symtab for PER_CU. This works properly regardless of |
7631 | whether we're using the index or psymtabs. */ | |
7632 | ||
7633 | static struct symtab * | |
7634 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
7635 | { | |
7636 | return (dwarf2_per_objfile->using_index | |
7637 | ? per_cu->v.quick->symtab | |
7638 | : per_cu->v.psymtab->symtab); | |
7639 | } | |
7640 | ||
7641 | /* A helper function for computing the list of all symbol tables | |
7642 | included by PER_CU. */ | |
7643 | ||
7644 | static void | |
ec94af83 DE |
7645 | recursively_compute_inclusions (VEC (symtab_ptr) **result, |
7646 | htab_t all_children, htab_t all_type_symtabs, | |
f9125b6c TT |
7647 | struct dwarf2_per_cu_data *per_cu, |
7648 | struct symtab *immediate_parent) | |
95554aad TT |
7649 | { |
7650 | void **slot; | |
7651 | int ix; | |
ec94af83 | 7652 | struct symtab *symtab; |
95554aad TT |
7653 | struct dwarf2_per_cu_data *iter; |
7654 | ||
7655 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7656 | if (*slot != NULL) | |
7657 | { | |
7658 | /* This inclusion and its children have been processed. */ | |
7659 | return; | |
7660 | } | |
7661 | ||
7662 | *slot = per_cu; | |
7663 | /* Only add a CU if it has a symbol table. */ | |
ec94af83 DE |
7664 | symtab = get_symtab (per_cu); |
7665 | if (symtab != NULL) | |
7666 | { | |
7667 | /* If this is a type unit only add its symbol table if we haven't | |
7668 | seen it yet (type unit per_cu's can share symtabs). */ | |
7669 | if (per_cu->is_debug_types) | |
7670 | { | |
7671 | slot = htab_find_slot (all_type_symtabs, symtab, INSERT); | |
7672 | if (*slot == NULL) | |
7673 | { | |
7674 | *slot = symtab; | |
7675 | VEC_safe_push (symtab_ptr, *result, symtab); | |
f9125b6c TT |
7676 | if (symtab->user == NULL) |
7677 | symtab->user = immediate_parent; | |
ec94af83 DE |
7678 | } |
7679 | } | |
7680 | else | |
f9125b6c TT |
7681 | { |
7682 | VEC_safe_push (symtab_ptr, *result, symtab); | |
7683 | if (symtab->user == NULL) | |
7684 | symtab->user = immediate_parent; | |
7685 | } | |
ec94af83 | 7686 | } |
95554aad TT |
7687 | |
7688 | for (ix = 0; | |
796a7ff8 | 7689 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7690 | ++ix) |
ec94af83 DE |
7691 | { |
7692 | recursively_compute_inclusions (result, all_children, | |
f9125b6c | 7693 | all_type_symtabs, iter, symtab); |
ec94af83 | 7694 | } |
95554aad TT |
7695 | } |
7696 | ||
7697 | /* Compute the symtab 'includes' fields for the symtab related to | |
7698 | PER_CU. */ | |
7699 | ||
7700 | static void | |
7701 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
7702 | { | |
f4dc4d17 DE |
7703 | gdb_assert (! per_cu->is_debug_types); |
7704 | ||
796a7ff8 | 7705 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7706 | { |
7707 | int ix, len; | |
ec94af83 DE |
7708 | struct dwarf2_per_cu_data *per_cu_iter; |
7709 | struct symtab *symtab_iter; | |
7710 | VEC (symtab_ptr) *result_symtabs = NULL; | |
7711 | htab_t all_children, all_type_symtabs; | |
95554aad TT |
7712 | struct symtab *symtab = get_symtab (per_cu); |
7713 | ||
7714 | /* If we don't have a symtab, we can just skip this case. */ | |
7715 | if (symtab == NULL) | |
7716 | return; | |
7717 | ||
7718 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7719 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7720 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7721 | NULL, xcalloc, xfree); | |
95554aad TT |
7722 | |
7723 | for (ix = 0; | |
796a7ff8 | 7724 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7725 | ix, per_cu_iter); |
95554aad | 7726 | ++ix) |
ec94af83 DE |
7727 | { |
7728 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c TT |
7729 | all_type_symtabs, per_cu_iter, |
7730 | symtab); | |
ec94af83 | 7731 | } |
95554aad | 7732 | |
ec94af83 DE |
7733 | /* Now we have a transitive closure of all the included symtabs. */ |
7734 | len = VEC_length (symtab_ptr, result_symtabs); | |
95554aad TT |
7735 | symtab->includes |
7736 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
7737 | (len + 1) * sizeof (struct symtab *)); | |
7738 | for (ix = 0; | |
ec94af83 | 7739 | VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter); |
95554aad | 7740 | ++ix) |
ec94af83 | 7741 | symtab->includes[ix] = symtab_iter; |
95554aad TT |
7742 | symtab->includes[len] = NULL; |
7743 | ||
ec94af83 | 7744 | VEC_free (symtab_ptr, result_symtabs); |
95554aad | 7745 | htab_delete (all_children); |
ec94af83 | 7746 | htab_delete (all_type_symtabs); |
95554aad TT |
7747 | } |
7748 | } | |
7749 | ||
7750 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7751 | read. */ | |
7752 | ||
7753 | static void | |
7754 | process_cu_includes (void) | |
7755 | { | |
7756 | int ix; | |
7757 | struct dwarf2_per_cu_data *iter; | |
7758 | ||
7759 | for (ix = 0; | |
7760 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
7761 | ix, iter); | |
7762 | ++ix) | |
f4dc4d17 DE |
7763 | { |
7764 | if (! iter->is_debug_types) | |
7765 | compute_symtab_includes (iter); | |
7766 | } | |
95554aad TT |
7767 | |
7768 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
7769 | } | |
7770 | ||
9cdd5dbd | 7771 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
7772 | already been loaded into memory. */ |
7773 | ||
7774 | static void | |
95554aad TT |
7775 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7776 | enum language pretend_language) | |
10b3939b | 7777 | { |
10b3939b | 7778 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 7779 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
7780 | CORE_ADDR lowpc, highpc; |
7781 | struct symtab *symtab; | |
3da10d80 | 7782 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 7783 | CORE_ADDR baseaddr; |
4359dff1 | 7784 | struct block *static_block; |
10b3939b DJ |
7785 | |
7786 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7787 | ||
10b3939b DJ |
7788 | buildsym_init (); |
7789 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 7790 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
7791 | |
7792 | cu->list_in_scope = &file_symbols; | |
c906108c | 7793 | |
95554aad TT |
7794 | cu->language = pretend_language; |
7795 | cu->language_defn = language_def (cu->language); | |
7796 | ||
c906108c | 7797 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 7798 | process_die (cu->dies, cu); |
c906108c | 7799 | |
a766d390 DE |
7800 | /* For now fudge the Go package. */ |
7801 | if (cu->language == language_go) | |
7802 | fixup_go_packaging (cu); | |
7803 | ||
3da10d80 KS |
7804 | /* Now that we have processed all the DIEs in the CU, all the types |
7805 | should be complete, and it should now be safe to compute all of the | |
7806 | physnames. */ | |
7807 | compute_delayed_physnames (cu); | |
7808 | do_cleanups (delayed_list_cleanup); | |
7809 | ||
fae299cd DC |
7810 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
7811 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
7812 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 7813 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 7814 | |
36586728 | 7815 | static_block |
ff546935 | 7816 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1); |
4359dff1 JK |
7817 | |
7818 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
7819 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
7820 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
7821 | addrmap to help ensure it has an accurate map of pc values belonging to | |
7822 | this comp unit. */ | |
7823 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
7824 | ||
7825 | symtab = end_symtab_from_static_block (static_block, objfile, | |
7826 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 7827 | |
8be455d7 | 7828 | if (symtab != NULL) |
c906108c | 7829 | { |
df15bd07 | 7830 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 7831 | |
8be455d7 JK |
7832 | /* Set symtab language to language from DW_AT_language. If the |
7833 | compilation is from a C file generated by language preprocessors, do | |
7834 | not set the language if it was already deduced by start_subfile. */ | |
7835 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7836 | symtab->language = cu->language; | |
7837 | ||
7838 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
7839 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
7840 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
7841 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
7842 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
7843 | |
7844 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
7845 | needed, it would be wrong due to missing DW_AT_producer there. | |
7846 | ||
7847 | Still one can confuse GDB by using non-standard GCC compilation | |
7848 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
7849 | */ | |
ab260dad | 7850 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 7851 | symtab->locations_valid = 1; |
e0d00bc7 JK |
7852 | |
7853 | if (gcc_4_minor >= 5) | |
7854 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
7855 | |
7856 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 7857 | } |
9291a0cd TT |
7858 | |
7859 | if (dwarf2_per_objfile->using_index) | |
7860 | per_cu->v.quick->symtab = symtab; | |
7861 | else | |
7862 | { | |
7863 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7864 | pst->symtab = symtab; | |
7865 | pst->readin = 1; | |
7866 | } | |
c906108c | 7867 | |
95554aad TT |
7868 | /* Push it for inclusion processing later. */ |
7869 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
7870 | ||
c906108c | 7871 | do_cleanups (back_to); |
f4dc4d17 | 7872 | } |
45cfd468 | 7873 | |
f4dc4d17 DE |
7874 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
7875 | already been loaded into memory. */ | |
7876 | ||
7877 | static void | |
7878 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
7879 | enum language pretend_language) | |
7880 | { | |
7881 | struct dwarf2_cu *cu = per_cu->cu; | |
7882 | struct objfile *objfile = per_cu->objfile; | |
7883 | struct symtab *symtab; | |
7884 | struct cleanup *back_to, *delayed_list_cleanup; | |
0186c6a7 DE |
7885 | struct signatured_type *sig_type; |
7886 | ||
7887 | gdb_assert (per_cu->is_debug_types); | |
7888 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7889 | |
7890 | buildsym_init (); | |
7891 | back_to = make_cleanup (really_free_pendings, NULL); | |
7892 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
7893 | ||
7894 | cu->list_in_scope = &file_symbols; | |
7895 | ||
7896 | cu->language = pretend_language; | |
7897 | cu->language_defn = language_def (cu->language); | |
7898 | ||
7899 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7900 | process_die (cu->dies, cu); | |
7901 | ||
7902 | /* For now fudge the Go package. */ | |
7903 | if (cu->language == language_go) | |
7904 | fixup_go_packaging (cu); | |
7905 | ||
7906 | /* Now that we have processed all the DIEs in the CU, all the types | |
7907 | should be complete, and it should now be safe to compute all of the | |
7908 | physnames. */ | |
7909 | compute_delayed_physnames (cu); | |
7910 | do_cleanups (delayed_list_cleanup); | |
7911 | ||
7912 | /* TUs share symbol tables. | |
7913 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7914 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7915 | this TU's symbols to the existing symtab. */ | |
0186c6a7 | 7916 | if (sig_type->type_unit_group->primary_symtab == NULL) |
45cfd468 | 7917 | { |
f4dc4d17 | 7918 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
0186c6a7 | 7919 | sig_type->type_unit_group->primary_symtab = symtab; |
f4dc4d17 DE |
7920 | |
7921 | if (symtab != NULL) | |
7922 | { | |
7923 | /* Set symtab language to language from DW_AT_language. If the | |
7924 | compilation is from a C file generated by language preprocessors, | |
7925 | do not set the language if it was already deduced by | |
7926 | start_subfile. */ | |
7927 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7928 | symtab->language = cu->language; | |
7929 | } | |
7930 | } | |
7931 | else | |
7932 | { | |
7933 | augment_type_symtab (objfile, | |
0186c6a7 DE |
7934 | sig_type->type_unit_group->primary_symtab); |
7935 | symtab = sig_type->type_unit_group->primary_symtab; | |
f4dc4d17 DE |
7936 | } |
7937 | ||
7938 | if (dwarf2_per_objfile->using_index) | |
7939 | per_cu->v.quick->symtab = symtab; | |
7940 | else | |
7941 | { | |
7942 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7943 | pst->symtab = symtab; | |
7944 | pst->readin = 1; | |
45cfd468 | 7945 | } |
f4dc4d17 DE |
7946 | |
7947 | do_cleanups (back_to); | |
c906108c SS |
7948 | } |
7949 | ||
95554aad TT |
7950 | /* Process an imported unit DIE. */ |
7951 | ||
7952 | static void | |
7953 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
7954 | { | |
7955 | struct attribute *attr; | |
7956 | ||
f4dc4d17 DE |
7957 | /* For now we don't handle imported units in type units. */ |
7958 | if (cu->per_cu->is_debug_types) | |
7959 | { | |
7960 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7961 | " supported in type units [in module %s]"), | |
4262abfb | 7962 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7963 | } |
7964 | ||
95554aad TT |
7965 | attr = dwarf2_attr (die, DW_AT_import, cu); |
7966 | if (attr != NULL) | |
7967 | { | |
7968 | struct dwarf2_per_cu_data *per_cu; | |
7969 | struct symtab *imported_symtab; | |
7970 | sect_offset offset; | |
36586728 | 7971 | int is_dwz; |
95554aad TT |
7972 | |
7973 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
7974 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
7975 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 7976 | |
69d751e3 | 7977 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
7978 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
7979 | load_full_comp_unit (per_cu, cu->language); | |
7980 | ||
796a7ff8 | 7981 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
7982 | per_cu); |
7983 | } | |
7984 | } | |
7985 | ||
adde2bff DE |
7986 | /* Reset the in_process bit of a die. */ |
7987 | ||
7988 | static void | |
7989 | reset_die_in_process (void *arg) | |
7990 | { | |
7991 | struct die_info *die = arg; | |
8c3cb9fa | 7992 | |
adde2bff DE |
7993 | die->in_process = 0; |
7994 | } | |
7995 | ||
c906108c SS |
7996 | /* Process a die and its children. */ |
7997 | ||
7998 | static void | |
e7c27a73 | 7999 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8000 | { |
adde2bff DE |
8001 | struct cleanup *in_process; |
8002 | ||
8003 | /* We should only be processing those not already in process. */ | |
8004 | gdb_assert (!die->in_process); | |
8005 | ||
8006 | die->in_process = 1; | |
8007 | in_process = make_cleanup (reset_die_in_process,die); | |
8008 | ||
c906108c SS |
8009 | switch (die->tag) |
8010 | { | |
8011 | case DW_TAG_padding: | |
8012 | break; | |
8013 | case DW_TAG_compile_unit: | |
95554aad | 8014 | case DW_TAG_partial_unit: |
e7c27a73 | 8015 | read_file_scope (die, cu); |
c906108c | 8016 | break; |
348e048f DE |
8017 | case DW_TAG_type_unit: |
8018 | read_type_unit_scope (die, cu); | |
8019 | break; | |
c906108c | 8020 | case DW_TAG_subprogram: |
c906108c | 8021 | case DW_TAG_inlined_subroutine: |
edb3359d | 8022 | read_func_scope (die, cu); |
c906108c SS |
8023 | break; |
8024 | case DW_TAG_lexical_block: | |
14898363 L |
8025 | case DW_TAG_try_block: |
8026 | case DW_TAG_catch_block: | |
e7c27a73 | 8027 | read_lexical_block_scope (die, cu); |
c906108c | 8028 | break; |
96408a79 SA |
8029 | case DW_TAG_GNU_call_site: |
8030 | read_call_site_scope (die, cu); | |
8031 | break; | |
c906108c | 8032 | case DW_TAG_class_type: |
680b30c7 | 8033 | case DW_TAG_interface_type: |
c906108c SS |
8034 | case DW_TAG_structure_type: |
8035 | case DW_TAG_union_type: | |
134d01f1 | 8036 | process_structure_scope (die, cu); |
c906108c SS |
8037 | break; |
8038 | case DW_TAG_enumeration_type: | |
134d01f1 | 8039 | process_enumeration_scope (die, cu); |
c906108c | 8040 | break; |
134d01f1 | 8041 | |
f792889a DJ |
8042 | /* These dies have a type, but processing them does not create |
8043 | a symbol or recurse to process the children. Therefore we can | |
8044 | read them on-demand through read_type_die. */ | |
c906108c | 8045 | case DW_TAG_subroutine_type: |
72019c9c | 8046 | case DW_TAG_set_type: |
c906108c | 8047 | case DW_TAG_array_type: |
c906108c | 8048 | case DW_TAG_pointer_type: |
c906108c | 8049 | case DW_TAG_ptr_to_member_type: |
c906108c | 8050 | case DW_TAG_reference_type: |
c906108c | 8051 | case DW_TAG_string_type: |
c906108c | 8052 | break; |
134d01f1 | 8053 | |
c906108c | 8054 | case DW_TAG_base_type: |
a02abb62 | 8055 | case DW_TAG_subrange_type: |
cb249c71 | 8056 | case DW_TAG_typedef: |
134d01f1 DJ |
8057 | /* Add a typedef symbol for the type definition, if it has a |
8058 | DW_AT_name. */ | |
f792889a | 8059 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8060 | break; |
c906108c | 8061 | case DW_TAG_common_block: |
e7c27a73 | 8062 | read_common_block (die, cu); |
c906108c SS |
8063 | break; |
8064 | case DW_TAG_common_inclusion: | |
8065 | break; | |
d9fa45fe | 8066 | case DW_TAG_namespace: |
4d4ec4e5 | 8067 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8068 | read_namespace (die, cu); |
d9fa45fe | 8069 | break; |
5d7cb8df | 8070 | case DW_TAG_module: |
4d4ec4e5 | 8071 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8072 | read_module (die, cu); |
8073 | break; | |
d9fa45fe | 8074 | case DW_TAG_imported_declaration: |
74921315 KS |
8075 | cu->processing_has_namespace_info = 1; |
8076 | if (read_namespace_alias (die, cu)) | |
8077 | break; | |
8078 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8079 | case DW_TAG_imported_module: |
4d4ec4e5 | 8080 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8081 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8082 | || cu->language != language_fortran)) | |
8083 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8084 | dwarf_tag_name (die->tag)); | |
8085 | read_import_statement (die, cu); | |
d9fa45fe | 8086 | break; |
95554aad TT |
8087 | |
8088 | case DW_TAG_imported_unit: | |
8089 | process_imported_unit_die (die, cu); | |
8090 | break; | |
8091 | ||
c906108c | 8092 | default: |
e7c27a73 | 8093 | new_symbol (die, NULL, cu); |
c906108c SS |
8094 | break; |
8095 | } | |
adde2bff DE |
8096 | |
8097 | do_cleanups (in_process); | |
c906108c | 8098 | } |
ca69b9e6 DE |
8099 | \f |
8100 | /* DWARF name computation. */ | |
c906108c | 8101 | |
94af9270 KS |
8102 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8103 | needs to have the name of the scope prepended to the name listed in the | |
8104 | die. */ | |
8105 | ||
8106 | static int | |
8107 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8108 | { | |
1c809c68 TT |
8109 | struct attribute *attr; |
8110 | ||
94af9270 KS |
8111 | switch (die->tag) |
8112 | { | |
8113 | case DW_TAG_namespace: | |
8114 | case DW_TAG_typedef: | |
8115 | case DW_TAG_class_type: | |
8116 | case DW_TAG_interface_type: | |
8117 | case DW_TAG_structure_type: | |
8118 | case DW_TAG_union_type: | |
8119 | case DW_TAG_enumeration_type: | |
8120 | case DW_TAG_enumerator: | |
8121 | case DW_TAG_subprogram: | |
8122 | case DW_TAG_member: | |
74921315 | 8123 | case DW_TAG_imported_declaration: |
94af9270 KS |
8124 | return 1; |
8125 | ||
8126 | case DW_TAG_variable: | |
c2b0a229 | 8127 | case DW_TAG_constant: |
94af9270 KS |
8128 | /* We only need to prefix "globally" visible variables. These include |
8129 | any variable marked with DW_AT_external or any variable that | |
8130 | lives in a namespace. [Variables in anonymous namespaces | |
8131 | require prefixing, but they are not DW_AT_external.] */ | |
8132 | ||
8133 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8134 | { | |
8135 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8136 | |
94af9270 KS |
8137 | return die_needs_namespace (die_specification (die, &spec_cu), |
8138 | spec_cu); | |
8139 | } | |
8140 | ||
1c809c68 | 8141 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8142 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8143 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8144 | return 0; |
8145 | /* A variable in a lexical block of some kind does not need a | |
8146 | namespace, even though in C++ such variables may be external | |
8147 | and have a mangled name. */ | |
8148 | if (die->parent->tag == DW_TAG_lexical_block | |
8149 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8150 | || die->parent->tag == DW_TAG_catch_block |
8151 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8152 | return 0; |
8153 | return 1; | |
94af9270 KS |
8154 | |
8155 | default: | |
8156 | return 0; | |
8157 | } | |
8158 | } | |
8159 | ||
98bfdba5 PA |
8160 | /* Retrieve the last character from a mem_file. */ |
8161 | ||
8162 | static void | |
8163 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
8164 | { | |
8165 | char *last_char_p = (char *) object; | |
8166 | ||
8167 | if (length > 0) | |
8168 | *last_char_p = buffer[length - 1]; | |
8169 | } | |
8170 | ||
94af9270 | 8171 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
8172 | compute the physname for the object, which include a method's: |
8173 | - formal parameters (C++/Java), | |
8174 | - receiver type (Go), | |
8175 | - return type (Java). | |
8176 | ||
8177 | The term "physname" is a bit confusing. | |
8178 | For C++, for example, it is the demangled name. | |
8179 | For Go, for example, it's the mangled name. | |
94af9270 | 8180 | |
af6b7be1 JB |
8181 | For Ada, return the DIE's linkage name rather than the fully qualified |
8182 | name. PHYSNAME is ignored.. | |
8183 | ||
94af9270 KS |
8184 | The result is allocated on the objfile_obstack and canonicalized. */ |
8185 | ||
8186 | static const char * | |
15d034d0 TT |
8187 | dwarf2_compute_name (const char *name, |
8188 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8189 | int physname) |
8190 | { | |
bb5ed363 DE |
8191 | struct objfile *objfile = cu->objfile; |
8192 | ||
94af9270 KS |
8193 | if (name == NULL) |
8194 | name = dwarf2_name (die, cu); | |
8195 | ||
f55ee35c JK |
8196 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
8197 | compute it by typename_concat inside GDB. */ | |
8198 | if (cu->language == language_ada | |
8199 | || (cu->language == language_fortran && physname)) | |
8200 | { | |
8201 | /* For Ada unit, we prefer the linkage name over the name, as | |
8202 | the former contains the exported name, which the user expects | |
8203 | to be able to reference. Ideally, we want the user to be able | |
8204 | to reference this entity using either natural or linkage name, | |
8205 | but we haven't started looking at this enhancement yet. */ | |
8206 | struct attribute *attr; | |
8207 | ||
8208 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8209 | if (attr == NULL) | |
8210 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8211 | if (attr && DW_STRING (attr)) | |
8212 | return DW_STRING (attr); | |
8213 | } | |
8214 | ||
94af9270 KS |
8215 | /* These are the only languages we know how to qualify names in. */ |
8216 | if (name != NULL | |
f55ee35c JK |
8217 | && (cu->language == language_cplus || cu->language == language_java |
8218 | || cu->language == language_fortran)) | |
94af9270 KS |
8219 | { |
8220 | if (die_needs_namespace (die, cu)) | |
8221 | { | |
8222 | long length; | |
0d5cff50 | 8223 | const char *prefix; |
94af9270 KS |
8224 | struct ui_file *buf; |
8225 | ||
8226 | prefix = determine_prefix (die, cu); | |
8227 | buf = mem_fileopen (); | |
8228 | if (*prefix != '\0') | |
8229 | { | |
f55ee35c JK |
8230 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8231 | physname, cu); | |
9a619af0 | 8232 | |
94af9270 KS |
8233 | fputs_unfiltered (prefixed_name, buf); |
8234 | xfree (prefixed_name); | |
8235 | } | |
8236 | else | |
62d5b8da | 8237 | fputs_unfiltered (name, buf); |
94af9270 | 8238 | |
98bfdba5 PA |
8239 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8240 | as children with DW_TAG_template_type_param or | |
8241 | DW_TAG_value_type_param. If the latter, add them to the name | |
8242 | here. If the name already has template parameters, then | |
8243 | skip this step; some versions of GCC emit both, and | |
8244 | it is more efficient to use the pre-computed name. | |
8245 | ||
8246 | Something to keep in mind about this process: it is very | |
8247 | unlikely, or in some cases downright impossible, to produce | |
8248 | something that will match the mangled name of a function. | |
8249 | If the definition of the function has the same debug info, | |
8250 | we should be able to match up with it anyway. But fallbacks | |
8251 | using the minimal symbol, for instance to find a method | |
8252 | implemented in a stripped copy of libstdc++, will not work. | |
8253 | If we do not have debug info for the definition, we will have to | |
8254 | match them up some other way. | |
8255 | ||
8256 | When we do name matching there is a related problem with function | |
8257 | templates; two instantiated function templates are allowed to | |
8258 | differ only by their return types, which we do not add here. */ | |
8259 | ||
8260 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8261 | { | |
8262 | struct attribute *attr; | |
8263 | struct die_info *child; | |
8264 | int first = 1; | |
8265 | ||
8266 | die->building_fullname = 1; | |
8267 | ||
8268 | for (child = die->child; child != NULL; child = child->sibling) | |
8269 | { | |
8270 | struct type *type; | |
12df843f | 8271 | LONGEST value; |
d521ce57 | 8272 | const gdb_byte *bytes; |
98bfdba5 PA |
8273 | struct dwarf2_locexpr_baton *baton; |
8274 | struct value *v; | |
8275 | ||
8276 | if (child->tag != DW_TAG_template_type_param | |
8277 | && child->tag != DW_TAG_template_value_param) | |
8278 | continue; | |
8279 | ||
8280 | if (first) | |
8281 | { | |
8282 | fputs_unfiltered ("<", buf); | |
8283 | first = 0; | |
8284 | } | |
8285 | else | |
8286 | fputs_unfiltered (", ", buf); | |
8287 | ||
8288 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8289 | if (attr == NULL) | |
8290 | { | |
8291 | complaint (&symfile_complaints, | |
8292 | _("template parameter missing DW_AT_type")); | |
8293 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8294 | continue; | |
8295 | } | |
8296 | type = die_type (child, cu); | |
8297 | ||
8298 | if (child->tag == DW_TAG_template_type_param) | |
8299 | { | |
79d43c61 | 8300 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8301 | continue; |
8302 | } | |
8303 | ||
8304 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8305 | if (attr == NULL) | |
8306 | { | |
8307 | complaint (&symfile_complaints, | |
3e43a32a MS |
8308 | _("template parameter missing " |
8309 | "DW_AT_const_value")); | |
98bfdba5 PA |
8310 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8311 | continue; | |
8312 | } | |
8313 | ||
8314 | dwarf2_const_value_attr (attr, type, name, | |
8315 | &cu->comp_unit_obstack, cu, | |
8316 | &value, &bytes, &baton); | |
8317 | ||
8318 | if (TYPE_NOSIGN (type)) | |
8319 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8320 | changed, this can use value_print instead. */ | |
8321 | c_printchar (value, type, buf); | |
8322 | else | |
8323 | { | |
8324 | struct value_print_options opts; | |
8325 | ||
8326 | if (baton != NULL) | |
8327 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8328 | baton->data, | |
8329 | baton->size, | |
8330 | baton->per_cu); | |
8331 | else if (bytes != NULL) | |
8332 | { | |
8333 | v = allocate_value (type); | |
8334 | memcpy (value_contents_writeable (v), bytes, | |
8335 | TYPE_LENGTH (type)); | |
8336 | } | |
8337 | else | |
8338 | v = value_from_longest (type, value); | |
8339 | ||
3e43a32a MS |
8340 | /* Specify decimal so that we do not depend on |
8341 | the radix. */ | |
98bfdba5 PA |
8342 | get_formatted_print_options (&opts, 'd'); |
8343 | opts.raw = 1; | |
8344 | value_print (v, buf, &opts); | |
8345 | release_value (v); | |
8346 | value_free (v); | |
8347 | } | |
8348 | } | |
8349 | ||
8350 | die->building_fullname = 0; | |
8351 | ||
8352 | if (!first) | |
8353 | { | |
8354 | /* Close the argument list, with a space if necessary | |
8355 | (nested templates). */ | |
8356 | char last_char = '\0'; | |
8357 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8358 | if (last_char == '>') | |
8359 | fputs_unfiltered (" >", buf); | |
8360 | else | |
8361 | fputs_unfiltered (">", buf); | |
8362 | } | |
8363 | } | |
8364 | ||
94af9270 KS |
8365 | /* For Java and C++ methods, append formal parameter type |
8366 | information, if PHYSNAME. */ | |
6e70227d | 8367 | |
94af9270 KS |
8368 | if (physname && die->tag == DW_TAG_subprogram |
8369 | && (cu->language == language_cplus | |
8370 | || cu->language == language_java)) | |
8371 | { | |
8372 | struct type *type = read_type_die (die, cu); | |
8373 | ||
79d43c61 TT |
8374 | c_type_print_args (type, buf, 1, cu->language, |
8375 | &type_print_raw_options); | |
94af9270 KS |
8376 | |
8377 | if (cu->language == language_java) | |
8378 | { | |
8379 | /* For java, we must append the return type to method | |
0963b4bd | 8380 | names. */ |
94af9270 KS |
8381 | if (die->tag == DW_TAG_subprogram) |
8382 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 8383 | 0, 0, &type_print_raw_options); |
94af9270 KS |
8384 | } |
8385 | else if (cu->language == language_cplus) | |
8386 | { | |
60430eff DJ |
8387 | /* Assume that an artificial first parameter is |
8388 | "this", but do not crash if it is not. RealView | |
8389 | marks unnamed (and thus unused) parameters as | |
8390 | artificial; there is no way to differentiate | |
8391 | the two cases. */ | |
94af9270 KS |
8392 | if (TYPE_NFIELDS (type) > 0 |
8393 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8394 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8395 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8396 | 0)))) | |
94af9270 KS |
8397 | fputs_unfiltered (" const", buf); |
8398 | } | |
8399 | } | |
8400 | ||
bb5ed363 | 8401 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
8402 | &length); |
8403 | ui_file_delete (buf); | |
8404 | ||
8405 | if (cu->language == language_cplus) | |
8406 | { | |
15d034d0 | 8407 | const char *cname |
94af9270 | 8408 | = dwarf2_canonicalize_name (name, cu, |
bb5ed363 | 8409 | &objfile->objfile_obstack); |
9a619af0 | 8410 | |
94af9270 KS |
8411 | if (cname != NULL) |
8412 | name = cname; | |
8413 | } | |
8414 | } | |
8415 | } | |
8416 | ||
8417 | return name; | |
8418 | } | |
8419 | ||
0114d602 DJ |
8420 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8421 | If scope qualifiers are appropriate they will be added. The result | |
8422 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
8423 | not have a name. NAME may either be from a previous call to |
8424 | dwarf2_name or NULL. | |
8425 | ||
0963b4bd | 8426 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
8427 | |
8428 | static const char * | |
15d034d0 | 8429 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8430 | { |
94af9270 KS |
8431 | return dwarf2_compute_name (name, die, cu, 0); |
8432 | } | |
0114d602 | 8433 | |
94af9270 KS |
8434 | /* Construct a physname for the given DIE in CU. NAME may either be |
8435 | from a previous call to dwarf2_name or NULL. The result will be | |
8436 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8437 | name. | |
0114d602 | 8438 | |
94af9270 | 8439 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 8440 | |
94af9270 | 8441 | static const char * |
15d034d0 | 8442 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8443 | { |
bb5ed363 | 8444 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8445 | struct attribute *attr; |
8446 | const char *retval, *mangled = NULL, *canon = NULL; | |
8447 | struct cleanup *back_to; | |
8448 | int need_copy = 1; | |
8449 | ||
8450 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8451 | on its own. */ | |
8452 | if (!die_needs_namespace (die, cu)) | |
8453 | return dwarf2_compute_name (name, die, cu, 1); | |
8454 | ||
8455 | back_to = make_cleanup (null_cleanup, NULL); | |
8456 | ||
8457 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8458 | if (!attr) | |
8459 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8460 | ||
8461 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
8462 | has computed. */ | |
8463 | if (attr && DW_STRING (attr)) | |
8464 | { | |
8465 | char *demangled; | |
8466 | ||
8467 | mangled = DW_STRING (attr); | |
8468 | ||
8469 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
8470 | type. It is easier for GDB users to search for such functions as | |
8471 | `name(params)' than `long name(params)'. In such case the minimal | |
8472 | symbol names do not match the full symbol names but for template | |
8473 | functions there is never a need to look up their definition from their | |
8474 | declaration so the only disadvantage remains the minimal symbol | |
8475 | variant `long name(params)' does not have the proper inferior type. | |
8476 | */ | |
8477 | ||
a766d390 DE |
8478 | if (cu->language == language_go) |
8479 | { | |
8480 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8481 | new_symbol_full assumes we return the mangled name. | |
8482 | This just undoes that lie until things are cleaned up. */ | |
8483 | demangled = NULL; | |
8484 | } | |
8485 | else | |
8486 | { | |
8de20a37 TT |
8487 | demangled = gdb_demangle (mangled, |
8488 | (DMGL_PARAMS | DMGL_ANSI | |
8489 | | (cu->language == language_java | |
8490 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
8491 | : DMGL_RET_DROP))); | |
a766d390 | 8492 | } |
900e11f9 JK |
8493 | if (demangled) |
8494 | { | |
8495 | make_cleanup (xfree, demangled); | |
8496 | canon = demangled; | |
8497 | } | |
8498 | else | |
8499 | { | |
8500 | canon = mangled; | |
8501 | need_copy = 0; | |
8502 | } | |
8503 | } | |
8504 | ||
8505 | if (canon == NULL || check_physname) | |
8506 | { | |
8507 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8508 | ||
8509 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8510 | { | |
8511 | /* It may not mean a bug in GDB. The compiler could also | |
8512 | compute DW_AT_linkage_name incorrectly. But in such case | |
8513 | GDB would need to be bug-to-bug compatible. */ | |
8514 | ||
8515 | complaint (&symfile_complaints, | |
8516 | _("Computed physname <%s> does not match demangled <%s> " | |
8517 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8518 | physname, canon, mangled, die->offset.sect_off, |
8519 | objfile_name (objfile)); | |
900e11f9 JK |
8520 | |
8521 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8522 | is available here - over computed PHYSNAME. It is safer | |
8523 | against both buggy GDB and buggy compilers. */ | |
8524 | ||
8525 | retval = canon; | |
8526 | } | |
8527 | else | |
8528 | { | |
8529 | retval = physname; | |
8530 | need_copy = 0; | |
8531 | } | |
8532 | } | |
8533 | else | |
8534 | retval = canon; | |
8535 | ||
8536 | if (need_copy) | |
10f0c4bb | 8537 | retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval)); |
900e11f9 JK |
8538 | |
8539 | do_cleanups (back_to); | |
8540 | return retval; | |
0114d602 DJ |
8541 | } |
8542 | ||
74921315 KS |
8543 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
8544 | a new symbol for it. | |
8545 | ||
8546 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
8547 | ||
8548 | static int | |
8549 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
8550 | { | |
8551 | struct attribute *attr; | |
8552 | ||
8553 | /* If the die does not have a name, this is not a namespace | |
8554 | alias. */ | |
8555 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8556 | if (attr != NULL) | |
8557 | { | |
8558 | int num; | |
8559 | struct die_info *d = die; | |
8560 | struct dwarf2_cu *imported_cu = cu; | |
8561 | ||
8562 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
8563 | keep inspecting DIEs until we hit the underlying import. */ | |
8564 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
8565 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
8566 | { | |
8567 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
8568 | if (attr == NULL) | |
8569 | break; | |
8570 | ||
8571 | d = follow_die_ref (d, attr, &imported_cu); | |
8572 | if (d->tag != DW_TAG_imported_declaration) | |
8573 | break; | |
8574 | } | |
8575 | ||
8576 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
8577 | { | |
8578 | complaint (&symfile_complaints, | |
8579 | _("DIE at 0x%x has too many recursively imported " | |
8580 | "declarations"), d->offset.sect_off); | |
8581 | return 0; | |
8582 | } | |
8583 | ||
8584 | if (attr != NULL) | |
8585 | { | |
8586 | struct type *type; | |
8587 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
8588 | ||
8589 | type = get_die_type_at_offset (offset, cu->per_cu); | |
8590 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
8591 | { | |
8592 | /* This declaration is a global namespace alias. Add | |
8593 | a symbol for it whose type is the aliased namespace. */ | |
8594 | new_symbol (die, type, cu); | |
8595 | return 1; | |
8596 | } | |
8597 | } | |
8598 | } | |
8599 | ||
8600 | return 0; | |
8601 | } | |
8602 | ||
27aa8d6a SW |
8603 | /* Read the import statement specified by the given die and record it. */ |
8604 | ||
8605 | static void | |
8606 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8607 | { | |
bb5ed363 | 8608 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8609 | struct attribute *import_attr; |
32019081 | 8610 | struct die_info *imported_die, *child_die; |
de4affc9 | 8611 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8612 | const char *imported_name; |
794684b6 | 8613 | const char *imported_name_prefix; |
13387711 SW |
8614 | const char *canonical_name; |
8615 | const char *import_alias; | |
8616 | const char *imported_declaration = NULL; | |
794684b6 | 8617 | const char *import_prefix; |
32019081 JK |
8618 | VEC (const_char_ptr) *excludes = NULL; |
8619 | struct cleanup *cleanups; | |
13387711 | 8620 | |
27aa8d6a SW |
8621 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8622 | if (import_attr == NULL) | |
8623 | { | |
8624 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8625 | dwarf_tag_name (die->tag)); | |
8626 | return; | |
8627 | } | |
8628 | ||
de4affc9 CC |
8629 | imported_cu = cu; |
8630 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8631 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8632 | if (imported_name == NULL) |
8633 | { | |
8634 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8635 | ||
8636 | The import in the following code: | |
8637 | namespace A | |
8638 | { | |
8639 | typedef int B; | |
8640 | } | |
8641 | ||
8642 | int main () | |
8643 | { | |
8644 | using A::B; | |
8645 | B b; | |
8646 | return b; | |
8647 | } | |
8648 | ||
8649 | ... | |
8650 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8651 | <52> DW_AT_decl_file : 1 | |
8652 | <53> DW_AT_decl_line : 6 | |
8653 | <54> DW_AT_import : <0x75> | |
8654 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8655 | <59> DW_AT_name : B | |
8656 | <5b> DW_AT_decl_file : 1 | |
8657 | <5c> DW_AT_decl_line : 2 | |
8658 | <5d> DW_AT_type : <0x6e> | |
8659 | ... | |
8660 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8661 | <76> DW_AT_byte_size : 4 | |
8662 | <77> DW_AT_encoding : 5 (signed) | |
8663 | ||
8664 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8665 | This case will be ignored until the gcc bug is fixed. */ | |
8666 | return; | |
8667 | } | |
8668 | ||
82856980 SW |
8669 | /* Figure out the local name after import. */ |
8670 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8671 | |
794684b6 SW |
8672 | /* Figure out where the statement is being imported to. */ |
8673 | import_prefix = determine_prefix (die, cu); | |
8674 | ||
8675 | /* Figure out what the scope of the imported die is and prepend it | |
8676 | to the name of the imported die. */ | |
de4affc9 | 8677 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8678 | |
f55ee35c JK |
8679 | if (imported_die->tag != DW_TAG_namespace |
8680 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8681 | { |
13387711 SW |
8682 | imported_declaration = imported_name; |
8683 | canonical_name = imported_name_prefix; | |
794684b6 | 8684 | } |
13387711 | 8685 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 TT |
8686 | canonical_name = obconcat (&objfile->objfile_obstack, |
8687 | imported_name_prefix, "::", imported_name, | |
8688 | (char *) NULL); | |
13387711 SW |
8689 | else |
8690 | canonical_name = imported_name; | |
794684b6 | 8691 | |
32019081 JK |
8692 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8693 | ||
8694 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8695 | for (child_die = die->child; child_die && child_die->tag; | |
8696 | child_die = sibling_die (child_die)) | |
8697 | { | |
8698 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8699 | represented by an imported module entry with an import attribute | |
8700 | referring to the module and owned entries corresponding to those | |
8701 | entities that are renamed as part of being imported. */ | |
8702 | ||
8703 | if (child_die->tag != DW_TAG_imported_declaration) | |
8704 | { | |
8705 | complaint (&symfile_complaints, | |
8706 | _("child DW_TAG_imported_declaration expected " | |
8707 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 8708 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8709 | continue; |
8710 | } | |
8711 | ||
8712 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
8713 | if (import_attr == NULL) | |
8714 | { | |
8715 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8716 | dwarf_tag_name (child_die->tag)); | |
8717 | continue; | |
8718 | } | |
8719 | ||
8720 | imported_cu = cu; | |
8721 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
8722 | &imported_cu); | |
8723 | imported_name = dwarf2_name (imported_die, imported_cu); | |
8724 | if (imported_name == NULL) | |
8725 | { | |
8726 | complaint (&symfile_complaints, | |
8727 | _("child DW_TAG_imported_declaration has unknown " | |
8728 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 8729 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8730 | continue; |
8731 | } | |
8732 | ||
8733 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
8734 | ||
8735 | process_die (child_die, cu); | |
8736 | } | |
8737 | ||
c0cc3a76 SW |
8738 | cp_add_using_directive (import_prefix, |
8739 | canonical_name, | |
8740 | import_alias, | |
13387711 | 8741 | imported_declaration, |
32019081 | 8742 | excludes, |
12aaed36 | 8743 | 0, |
bb5ed363 | 8744 | &objfile->objfile_obstack); |
32019081 JK |
8745 | |
8746 | do_cleanups (cleanups); | |
27aa8d6a SW |
8747 | } |
8748 | ||
f4dc4d17 | 8749 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 8750 | |
cb1df416 DJ |
8751 | static void |
8752 | free_cu_line_header (void *arg) | |
8753 | { | |
8754 | struct dwarf2_cu *cu = arg; | |
8755 | ||
8756 | free_line_header (cu->line_header); | |
8757 | cu->line_header = NULL; | |
8758 | } | |
8759 | ||
1b80a9fa JK |
8760 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
8761 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
8762 | this, it was first present in GCC release 4.3.0. */ | |
8763 | ||
8764 | static int | |
8765 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
8766 | { | |
8767 | if (!cu->checked_producer) | |
8768 | check_producer (cu); | |
8769 | ||
8770 | return cu->producer_is_gcc_lt_4_3; | |
8771 | } | |
8772 | ||
9291a0cd TT |
8773 | static void |
8774 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 8775 | const char **name, const char **comp_dir) |
9291a0cd TT |
8776 | { |
8777 | struct attribute *attr; | |
8778 | ||
8779 | *name = NULL; | |
8780 | *comp_dir = NULL; | |
8781 | ||
8782 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
8783 | is not a source language identifier. */ | |
8784 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8785 | if (attr) | |
8786 | { | |
8787 | *name = DW_STRING (attr); | |
8788 | } | |
8789 | ||
8790 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
8791 | if (attr) | |
8792 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
8793 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
8794 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 8795 | { |
15d034d0 TT |
8796 | char *d = ldirname (*name); |
8797 | ||
8798 | *comp_dir = d; | |
8799 | if (d != NULL) | |
8800 | make_cleanup (xfree, d); | |
9291a0cd TT |
8801 | } |
8802 | if (*comp_dir != NULL) | |
8803 | { | |
8804 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
8805 | directory, get rid of it. */ | |
8806 | char *cp = strchr (*comp_dir, ':'); | |
8807 | ||
8808 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
8809 | *comp_dir = cp + 1; | |
8810 | } | |
8811 | ||
8812 | if (*name == NULL) | |
8813 | *name = "<unknown>"; | |
8814 | } | |
8815 | ||
f4dc4d17 DE |
8816 | /* Handle DW_AT_stmt_list for a compilation unit. |
8817 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
8818 | COMP_DIR is the compilation directory. |
8819 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
8820 | |
8821 | static void | |
8822 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
b385a60d | 8823 | const char *comp_dir) /* ARI: editCase function */ |
2ab95328 TT |
8824 | { |
8825 | struct attribute *attr; | |
2ab95328 | 8826 | |
f4dc4d17 DE |
8827 | gdb_assert (! cu->per_cu->is_debug_types); |
8828 | ||
2ab95328 TT |
8829 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
8830 | if (attr) | |
8831 | { | |
8832 | unsigned int line_offset = DW_UNSND (attr); | |
8833 | struct line_header *line_header | |
3019eac3 | 8834 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
8835 | |
8836 | if (line_header) | |
dee91e82 DE |
8837 | { |
8838 | cu->line_header = line_header; | |
8839 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 8840 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 8841 | } |
2ab95328 TT |
8842 | } |
8843 | } | |
8844 | ||
95554aad | 8845 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 8846 | |
c906108c | 8847 | static void |
e7c27a73 | 8848 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8849 | { |
dee91e82 | 8850 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 8851 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 8852 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
8853 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
8854 | struct attribute *attr; | |
15d034d0 TT |
8855 | const char *name = NULL; |
8856 | const char *comp_dir = NULL; | |
c906108c SS |
8857 | struct die_info *child_die; |
8858 | bfd *abfd = objfile->obfd; | |
e142c38c | 8859 | CORE_ADDR baseaddr; |
6e70227d | 8860 | |
e142c38c | 8861 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 8862 | |
fae299cd | 8863 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
8864 | |
8865 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
8866 | from finish_block. */ | |
2acceee2 | 8867 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
8868 | lowpc = highpc; |
8869 | lowpc += baseaddr; | |
8870 | highpc += baseaddr; | |
8871 | ||
9291a0cd | 8872 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 8873 | |
95554aad | 8874 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 8875 | |
f4b8a18d KW |
8876 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
8877 | standardised yet. As a workaround for the language detection we fall | |
8878 | back to the DW_AT_producer string. */ | |
8879 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
8880 | cu->language = language_opencl; | |
8881 | ||
3019eac3 DE |
8882 | /* Similar hack for Go. */ |
8883 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
8884 | set_cu_language (DW_LANG_Go, cu); | |
8885 | ||
f4dc4d17 | 8886 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
8887 | |
8888 | /* Decode line number information if present. We do this before | |
8889 | processing child DIEs, so that the line header table is available | |
8890 | for DW_AT_decl_file. */ | |
f4dc4d17 | 8891 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
8892 | |
8893 | /* Process all dies in compilation unit. */ | |
8894 | if (die->child != NULL) | |
8895 | { | |
8896 | child_die = die->child; | |
8897 | while (child_die && child_die->tag) | |
8898 | { | |
8899 | process_die (child_die, cu); | |
8900 | child_die = sibling_die (child_die); | |
8901 | } | |
8902 | } | |
8903 | ||
8904 | /* Decode macro information, if present. Dwarf 2 macro information | |
8905 | refers to information in the line number info statement program | |
8906 | header, so we can only read it if we've read the header | |
8907 | successfully. */ | |
8908 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
8909 | if (attr && cu->line_header) | |
8910 | { | |
8911 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
8912 | complaint (&symfile_complaints, | |
8913 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
8914 | ||
09262596 | 8915 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
8916 | } |
8917 | else | |
8918 | { | |
8919 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
8920 | if (attr && cu->line_header) | |
8921 | { | |
8922 | unsigned int macro_offset = DW_UNSND (attr); | |
8923 | ||
09262596 | 8924 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
8925 | } |
8926 | } | |
8927 | ||
8928 | do_cleanups (back_to); | |
8929 | } | |
8930 | ||
f4dc4d17 DE |
8931 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
8932 | Create the set of symtabs used by this TU, or if this TU is sharing | |
8933 | symtabs with another TU and the symtabs have already been created | |
8934 | then restore those symtabs in the line header. | |
8935 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
8936 | |
8937 | static void | |
f4dc4d17 | 8938 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 8939 | { |
f4dc4d17 DE |
8940 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8941 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
8942 | struct type_unit_group *tu_group; | |
8943 | int first_time; | |
8944 | struct line_header *lh; | |
3019eac3 | 8945 | struct attribute *attr; |
f4dc4d17 | 8946 | unsigned int i, line_offset; |
0186c6a7 | 8947 | struct signatured_type *sig_type; |
3019eac3 | 8948 | |
f4dc4d17 | 8949 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 8950 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 8951 | |
f4dc4d17 | 8952 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 8953 | |
f4dc4d17 | 8954 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 8955 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
8956 | if (sig_type->type_unit_group == NULL) |
8957 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
8958 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
8959 | |
8960 | /* If we've already processed this stmt_list there's no real need to | |
8961 | do it again, we could fake it and just recreate the part we need | |
8962 | (file name,index -> symtab mapping). If data shows this optimization | |
8963 | is useful we can do it then. */ | |
8964 | first_time = tu_group->primary_symtab == NULL; | |
8965 | ||
8966 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
8967 | debug info. */ | |
8968 | lh = NULL; | |
8969 | if (attr != NULL) | |
3019eac3 | 8970 | { |
f4dc4d17 DE |
8971 | line_offset = DW_UNSND (attr); |
8972 | lh = dwarf_decode_line_header (line_offset, cu); | |
8973 | } | |
8974 | if (lh == NULL) | |
8975 | { | |
8976 | if (first_time) | |
8977 | dwarf2_start_symtab (cu, "", NULL, 0); | |
8978 | else | |
8979 | { | |
8980 | gdb_assert (tu_group->symtabs == NULL); | |
8981 | restart_symtab (0); | |
8982 | } | |
8983 | /* Note: The primary symtab will get allocated at the end. */ | |
8984 | return; | |
3019eac3 DE |
8985 | } |
8986 | ||
f4dc4d17 DE |
8987 | cu->line_header = lh; |
8988 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 8989 | |
f4dc4d17 DE |
8990 | if (first_time) |
8991 | { | |
8992 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 8993 | |
f4dc4d17 DE |
8994 | tu_group->num_symtabs = lh->num_file_names; |
8995 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 8996 | |
f4dc4d17 DE |
8997 | for (i = 0; i < lh->num_file_names; ++i) |
8998 | { | |
d521ce57 | 8999 | const char *dir = NULL; |
f4dc4d17 | 9000 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 9001 | |
f4dc4d17 DE |
9002 | if (fe->dir_index) |
9003 | dir = lh->include_dirs[fe->dir_index - 1]; | |
9004 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 9005 | |
f4dc4d17 DE |
9006 | /* Note: We don't have to watch for the main subfile here, type units |
9007 | don't have DW_AT_name. */ | |
3019eac3 | 9008 | |
f4dc4d17 DE |
9009 | if (current_subfile->symtab == NULL) |
9010 | { | |
9011 | /* NOTE: start_subfile will recognize when it's been passed | |
9012 | a file it has already seen. So we can't assume there's a | |
9013 | simple mapping from lh->file_names to subfiles, | |
9014 | lh->file_names may contain dups. */ | |
9015 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
9016 | objfile); | |
9017 | } | |
9018 | ||
9019 | fe->symtab = current_subfile->symtab; | |
9020 | tu_group->symtabs[i] = fe->symtab; | |
9021 | } | |
9022 | } | |
9023 | else | |
3019eac3 | 9024 | { |
f4dc4d17 DE |
9025 | restart_symtab (0); |
9026 | ||
9027 | for (i = 0; i < lh->num_file_names; ++i) | |
9028 | { | |
9029 | struct file_entry *fe = &lh->file_names[i]; | |
9030 | ||
9031 | fe->symtab = tu_group->symtabs[i]; | |
9032 | } | |
3019eac3 DE |
9033 | } |
9034 | ||
f4dc4d17 DE |
9035 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9036 | so they don't have a "real" (so to speak) symtab anyway. | |
9037 | There is later code that will assign the main symtab to all symbols | |
9038 | that don't have one. We need to handle the case of a symbol with a | |
9039 | missing symtab (DW_AT_decl_file) anyway. */ | |
9040 | } | |
3019eac3 | 9041 | |
f4dc4d17 DE |
9042 | /* Process DW_TAG_type_unit. |
9043 | For TUs we want to skip the first top level sibling if it's not the | |
9044 | actual type being defined by this TU. In this case the first top | |
9045 | level sibling is there to provide context only. */ | |
3019eac3 | 9046 | |
f4dc4d17 DE |
9047 | static void |
9048 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9049 | { | |
9050 | struct die_info *child_die; | |
3019eac3 | 9051 | |
f4dc4d17 DE |
9052 | prepare_one_comp_unit (cu, die, language_minimal); |
9053 | ||
9054 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9055 | We do this before processing child DIEs, so that the line header table | |
9056 | is available for DW_AT_decl_file. */ | |
9057 | setup_type_unit_groups (die, cu); | |
9058 | ||
9059 | if (die->child != NULL) | |
9060 | { | |
9061 | child_die = die->child; | |
9062 | while (child_die && child_die->tag) | |
9063 | { | |
9064 | process_die (child_die, cu); | |
9065 | child_die = sibling_die (child_die); | |
9066 | } | |
9067 | } | |
3019eac3 DE |
9068 | } |
9069 | \f | |
80626a55 DE |
9070 | /* DWO/DWP files. |
9071 | ||
9072 | http://gcc.gnu.org/wiki/DebugFission | |
9073 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9074 | ||
9075 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9076 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9077 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9078 | |
9079 | static hashval_t | |
9080 | hash_dwo_file (const void *item) | |
9081 | { | |
9082 | const struct dwo_file *dwo_file = item; | |
a2ce51a0 | 9083 | hashval_t hash; |
3019eac3 | 9084 | |
a2ce51a0 DE |
9085 | hash = htab_hash_string (dwo_file->dwo_name); |
9086 | if (dwo_file->comp_dir != NULL) | |
9087 | hash += htab_hash_string (dwo_file->comp_dir); | |
9088 | return hash; | |
3019eac3 DE |
9089 | } |
9090 | ||
9091 | static int | |
9092 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9093 | { | |
9094 | const struct dwo_file *lhs = item_lhs; | |
9095 | const struct dwo_file *rhs = item_rhs; | |
9096 | ||
a2ce51a0 DE |
9097 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9098 | return 0; | |
9099 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9100 | return lhs->comp_dir == rhs->comp_dir; | |
9101 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9102 | } |
9103 | ||
9104 | /* Allocate a hash table for DWO files. */ | |
9105 | ||
9106 | static htab_t | |
9107 | allocate_dwo_file_hash_table (void) | |
9108 | { | |
9109 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9110 | ||
9111 | return htab_create_alloc_ex (41, | |
9112 | hash_dwo_file, | |
9113 | eq_dwo_file, | |
9114 | NULL, | |
9115 | &objfile->objfile_obstack, | |
9116 | hashtab_obstack_allocate, | |
9117 | dummy_obstack_deallocate); | |
9118 | } | |
9119 | ||
80626a55 DE |
9120 | /* Lookup DWO file DWO_NAME. */ |
9121 | ||
9122 | static void ** | |
0ac5b59e | 9123 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9124 | { |
9125 | struct dwo_file find_entry; | |
9126 | void **slot; | |
9127 | ||
9128 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9129 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9130 | ||
9131 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9132 | find_entry.dwo_name = dwo_name; |
9133 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9134 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9135 | ||
9136 | return slot; | |
9137 | } | |
9138 | ||
3019eac3 DE |
9139 | static hashval_t |
9140 | hash_dwo_unit (const void *item) | |
9141 | { | |
9142 | const struct dwo_unit *dwo_unit = item; | |
9143 | ||
9144 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9145 | return dwo_unit->signature; | |
9146 | } | |
9147 | ||
9148 | static int | |
9149 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9150 | { | |
9151 | const struct dwo_unit *lhs = item_lhs; | |
9152 | const struct dwo_unit *rhs = item_rhs; | |
9153 | ||
9154 | /* The signature is assumed to be unique within the DWO file. | |
9155 | So while object file CU dwo_id's always have the value zero, | |
9156 | that's OK, assuming each object file DWO file has only one CU, | |
9157 | and that's the rule for now. */ | |
9158 | return lhs->signature == rhs->signature; | |
9159 | } | |
9160 | ||
9161 | /* Allocate a hash table for DWO CUs,TUs. | |
9162 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9163 | ||
9164 | static htab_t | |
9165 | allocate_dwo_unit_table (struct objfile *objfile) | |
9166 | { | |
9167 | /* Start out with a pretty small number. | |
9168 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9169 | return htab_create_alloc_ex (3, | |
9170 | hash_dwo_unit, | |
9171 | eq_dwo_unit, | |
9172 | NULL, | |
9173 | &objfile->objfile_obstack, | |
9174 | hashtab_obstack_allocate, | |
9175 | dummy_obstack_deallocate); | |
9176 | } | |
9177 | ||
80626a55 | 9178 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9179 | |
19c3d4c9 | 9180 | struct create_dwo_cu_data |
3019eac3 DE |
9181 | { |
9182 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9183 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9184 | }; |
9185 | ||
19c3d4c9 | 9186 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9187 | |
9188 | static void | |
19c3d4c9 DE |
9189 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9190 | const gdb_byte *info_ptr, | |
9191 | struct die_info *comp_unit_die, | |
9192 | int has_children, | |
9193 | void *datap) | |
3019eac3 DE |
9194 | { |
9195 | struct dwarf2_cu *cu = reader->cu; | |
9196 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9197 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 9198 | struct dwarf2_section_info *section = cu->per_cu->section; |
19c3d4c9 | 9199 | struct create_dwo_cu_data *data = datap; |
3019eac3 | 9200 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9201 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9202 | struct attribute *attr; |
3019eac3 DE |
9203 | |
9204 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9205 | if (attr == NULL) | |
9206 | { | |
19c3d4c9 DE |
9207 | complaint (&symfile_complaints, |
9208 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9209 | " its dwo_id [in module %s]"), | |
9210 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
9211 | return; |
9212 | } | |
9213 | ||
3019eac3 DE |
9214 | dwo_unit->dwo_file = dwo_file; |
9215 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9216 | dwo_unit->section = section; |
3019eac3 DE |
9217 | dwo_unit->offset = offset; |
9218 | dwo_unit->length = cu->per_cu->length; | |
9219 | ||
09406207 | 9220 | if (dwarf2_read_debug) |
4031ecc5 DE |
9221 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9222 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9223 | } |
9224 | ||
19c3d4c9 DE |
9225 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
9226 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 9227 | |
19c3d4c9 DE |
9228 | static struct dwo_unit * |
9229 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
9230 | { |
9231 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9232 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
9233 | bfd *abfd; | |
9234 | htab_t cu_htab; | |
d521ce57 | 9235 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
9236 | struct create_dwo_cu_data create_dwo_cu_data; |
9237 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
9238 | |
9239 | dwarf2_read_section (objfile, section); | |
9240 | info_ptr = section->buffer; | |
9241 | ||
9242 | if (info_ptr == NULL) | |
9243 | return NULL; | |
9244 | ||
9245 | /* We can't set abfd until now because the section may be empty or | |
9246 | not present, in which case section->asection will be NULL. */ | |
a32a8923 | 9247 | abfd = get_section_bfd_owner (section); |
3019eac3 | 9248 | |
09406207 | 9249 | if (dwarf2_read_debug) |
19c3d4c9 DE |
9250 | { |
9251 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
a32a8923 DE |
9252 | get_section_name (section), |
9253 | get_section_file_name (section)); | |
19c3d4c9 | 9254 | } |
3019eac3 | 9255 | |
19c3d4c9 DE |
9256 | create_dwo_cu_data.dwo_file = dwo_file; |
9257 | dwo_unit = NULL; | |
3019eac3 DE |
9258 | |
9259 | end_ptr = info_ptr + section->size; | |
9260 | while (info_ptr < end_ptr) | |
9261 | { | |
9262 | struct dwarf2_per_cu_data per_cu; | |
9263 | ||
19c3d4c9 DE |
9264 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9265 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9266 | memset (&per_cu, 0, sizeof (per_cu)); |
9267 | per_cu.objfile = objfile; | |
9268 | per_cu.is_debug_types = 0; | |
9269 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 9270 | per_cu.section = section; |
3019eac3 | 9271 | |
33e80786 | 9272 | init_cutu_and_read_dies_no_follow (&per_cu, dwo_file, |
19c3d4c9 DE |
9273 | create_dwo_cu_reader, |
9274 | &create_dwo_cu_data); | |
9275 | ||
9276 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
9277 | { | |
9278 | /* If we've already found one, complain. We only support one | |
9279 | because having more than one requires hacking the dwo_name of | |
9280 | each to match, which is highly unlikely to happen. */ | |
9281 | if (dwo_unit != NULL) | |
9282 | { | |
9283 | complaint (&symfile_complaints, | |
9284 | _("Multiple CUs in DWO file %s [in module %s]"), | |
4262abfb | 9285 | dwo_file->dwo_name, objfile_name (objfile)); |
19c3d4c9 DE |
9286 | break; |
9287 | } | |
9288 | ||
9289 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9290 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9291 | } | |
3019eac3 DE |
9292 | |
9293 | info_ptr += per_cu.length; | |
9294 | } | |
9295 | ||
19c3d4c9 | 9296 | return dwo_unit; |
3019eac3 DE |
9297 | } |
9298 | ||
80626a55 DE |
9299 | /* DWP file .debug_{cu,tu}_index section format: |
9300 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9301 | ||
d2415c6c DE |
9302 | DWP Version 1: |
9303 | ||
80626a55 DE |
9304 | Both index sections have the same format, and serve to map a 64-bit |
9305 | signature to a set of section numbers. Each section begins with a header, | |
9306 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9307 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9308 | aligned at 8-byte boundaries in the file. | |
9309 | ||
d2415c6c DE |
9310 | The index section header consists of: |
9311 | ||
9312 | V, 32 bit version number | |
9313 | -, 32 bits unused | |
9314 | N, 32 bit number of compilation units or type units in the index | |
9315 | M, 32 bit number of slots in the hash table | |
80626a55 | 9316 | |
d2415c6c | 9317 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9318 | |
d2415c6c DE |
9319 | The hash table begins at offset 16 in the section, and consists of an array |
9320 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9321 | order of the application binary). Unused slots in the hash table are 0. | |
9322 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9323 | |
d2415c6c DE |
9324 | The parallel table begins immediately after the hash table |
9325 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9326 | array of 32-bit indexes (using the byte order of the application binary), | |
9327 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9328 | table contains a 32-bit index into the pool of section numbers. For unused | |
9329 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9330 | |
73869dc2 DE |
9331 | The pool of section numbers begins immediately following the hash table |
9332 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9333 | section numbers consists of an array of 32-bit words (using the byte order | |
9334 | of the application binary). Each item in the array is indexed starting | |
9335 | from 0. The hash table entry provides the index of the first section | |
9336 | number in the set. Additional section numbers in the set follow, and the | |
9337 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9338 | ||
9339 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
9340 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9341 | be the second entry. Other members of the set may follow in any order. | |
9342 | ||
9343 | --- | |
9344 | ||
9345 | DWP Version 2: | |
9346 | ||
9347 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
9348 | and the entries in the index tables are now offsets into these sections. | |
9349 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
9350 | section. | |
9351 | ||
9352 | Index Section Contents: | |
9353 | Header | |
9354 | Hash Table of Signatures dwp_hash_table.hash_table | |
9355 | Parallel Table of Indices dwp_hash_table.unit_table | |
9356 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
9357 | Table of Section Sizes dwp_hash_table.v2.sizes | |
9358 | ||
9359 | The index section header consists of: | |
9360 | ||
9361 | V, 32 bit version number | |
9362 | L, 32 bit number of columns in the table of section offsets | |
9363 | N, 32 bit number of compilation units or type units in the index | |
9364 | M, 32 bit number of slots in the hash table | |
9365 | ||
9366 | Numbers are recorded using the byte order of the application binary. | |
9367 | ||
9368 | The hash table has the same format as version 1. | |
9369 | The parallel table of indices has the same format as version 1, | |
9370 | except that the entries are origin-1 indices into the table of sections | |
9371 | offsets and the table of section sizes. | |
9372 | ||
9373 | The table of offsets begins immediately following the parallel table | |
9374 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
9375 | a two-dimensional array of 32-bit words (using the byte order of the | |
9376 | application binary), with L columns and N+1 rows, in row-major order. | |
9377 | Each row in the array is indexed starting from 0. The first row provides | |
9378 | a key to the remaining rows: each column in this row provides an identifier | |
9379 | for a debug section, and the offsets in the same column of subsequent rows | |
9380 | refer to that section. The section identifiers are: | |
9381 | ||
9382 | DW_SECT_INFO 1 .debug_info.dwo | |
9383 | DW_SECT_TYPES 2 .debug_types.dwo | |
9384 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
9385 | DW_SECT_LINE 4 .debug_line.dwo | |
9386 | DW_SECT_LOC 5 .debug_loc.dwo | |
9387 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
9388 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
9389 | DW_SECT_MACRO 8 .debug_macro.dwo | |
9390 | ||
9391 | The offsets provided by the CU and TU index sections are the base offsets | |
9392 | for the contributions made by each CU or TU to the corresponding section | |
9393 | in the package file. Each CU and TU header contains an abbrev_offset | |
9394 | field, used to find the abbreviations table for that CU or TU within the | |
9395 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
9396 | be interpreted as relative to the base offset given in the index section. | |
9397 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
9398 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
9399 | and offsets into other debug sections obtained from DWARF attributes should | |
9400 | also be interpreted as relative to the corresponding base offset. | |
9401 | ||
9402 | The table of sizes begins immediately following the table of offsets. | |
9403 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
9404 | with L columns and N rows, in row-major order. Each row in the array is | |
9405 | indexed starting from 1 (row 0 is shared by the two tables). | |
9406 | ||
9407 | --- | |
9408 | ||
9409 | Hash table lookup is handled the same in version 1 and 2: | |
9410 | ||
9411 | We assume that N and M will not exceed 2^32 - 1. | |
9412 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
9413 | ||
d2415c6c DE |
9414 | Given a 64-bit compilation unit signature or a type signature S, an entry |
9415 | in the hash table is located as follows: | |
80626a55 | 9416 | |
d2415c6c DE |
9417 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
9418 | the low-order k bits all set to 1. | |
80626a55 | 9419 | |
d2415c6c | 9420 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 9421 | |
d2415c6c DE |
9422 | 3) If the hash table entry at index H matches the signature, use that |
9423 | entry. If the hash table entry at index H is unused (all zeroes), | |
9424 | terminate the search: the signature is not present in the table. | |
80626a55 | 9425 | |
d2415c6c | 9426 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 9427 | |
d2415c6c | 9428 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 9429 | to stop at an unused slot or find the match. */ |
80626a55 DE |
9430 | |
9431 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
9432 | .debug_{info,types}.dwo in DWP_FILE. | |
9433 | Returns NULL if there isn't one. | |
9434 | Note: This function processes DWP files only, not DWO files. */ | |
9435 | ||
9436 | static struct dwp_hash_table * | |
9437 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
9438 | { | |
9439 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9440 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 9441 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 9442 | struct dwarf2_section_info *index; |
73869dc2 | 9443 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
9444 | struct dwp_hash_table *htab; |
9445 | ||
9446 | if (is_debug_types) | |
9447 | index = &dwp_file->sections.tu_index; | |
9448 | else | |
9449 | index = &dwp_file->sections.cu_index; | |
9450 | ||
9451 | if (dwarf2_section_empty_p (index)) | |
9452 | return NULL; | |
9453 | dwarf2_read_section (objfile, index); | |
9454 | ||
9455 | index_ptr = index->buffer; | |
9456 | index_end = index_ptr + index->size; | |
9457 | ||
9458 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
9459 | index_ptr += 4; |
9460 | if (version == 2) | |
9461 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
9462 | else | |
9463 | nr_columns = 0; | |
9464 | index_ptr += 4; | |
80626a55 DE |
9465 | nr_units = read_4_bytes (dbfd, index_ptr); |
9466 | index_ptr += 4; | |
9467 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
9468 | index_ptr += 4; | |
9469 | ||
73869dc2 | 9470 | if (version != 1 && version != 2) |
80626a55 | 9471 | { |
21aa081e | 9472 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 9473 | " [in module %s]"), |
21aa081e | 9474 | pulongest (version), dwp_file->name); |
80626a55 DE |
9475 | } |
9476 | if (nr_slots != (nr_slots & -nr_slots)) | |
9477 | { | |
21aa081e | 9478 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 9479 | " is not power of 2 [in module %s]"), |
21aa081e | 9480 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
9481 | } |
9482 | ||
9483 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
9484 | htab->version = version; |
9485 | htab->nr_columns = nr_columns; | |
80626a55 DE |
9486 | htab->nr_units = nr_units; |
9487 | htab->nr_slots = nr_slots; | |
9488 | htab->hash_table = index_ptr; | |
9489 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
9490 | |
9491 | /* Exit early if the table is empty. */ | |
9492 | if (nr_slots == 0 || nr_units == 0 | |
9493 | || (version == 2 && nr_columns == 0)) | |
9494 | { | |
9495 | /* All must be zero. */ | |
9496 | if (nr_slots != 0 || nr_units != 0 | |
9497 | || (version == 2 && nr_columns != 0)) | |
9498 | { | |
9499 | complaint (&symfile_complaints, | |
9500 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
9501 | " all zero [in modules %s]"), | |
9502 | dwp_file->name); | |
9503 | } | |
9504 | return htab; | |
9505 | } | |
9506 | ||
9507 | if (version == 1) | |
9508 | { | |
9509 | htab->section_pool.v1.indices = | |
9510 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9511 | /* It's harder to decide whether the section is too small in v1. | |
9512 | V1 is deprecated anyway so we punt. */ | |
9513 | } | |
9514 | else | |
9515 | { | |
9516 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9517 | int *ids = htab->section_pool.v2.section_ids; | |
9518 | /* Reverse map for error checking. */ | |
9519 | int ids_seen[DW_SECT_MAX + 1]; | |
9520 | int i; | |
9521 | ||
9522 | if (nr_columns < 2) | |
9523 | { | |
9524 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
9525 | " in section table [in module %s]"), | |
9526 | dwp_file->name); | |
9527 | } | |
9528 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
9529 | { | |
9530 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
9531 | " in section table [in module %s]"), | |
9532 | dwp_file->name); | |
9533 | } | |
9534 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9535 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
9536 | for (i = 0; i < nr_columns; ++i) | |
9537 | { | |
9538 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
9539 | ||
9540 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
9541 | { | |
9542 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
9543 | " in section table [in module %s]"), | |
9544 | id, dwp_file->name); | |
9545 | } | |
9546 | if (ids_seen[id] != -1) | |
9547 | { | |
9548 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
9549 | " id %d in section table [in module %s]"), | |
9550 | id, dwp_file->name); | |
9551 | } | |
9552 | ids_seen[id] = i; | |
9553 | ids[i] = id; | |
9554 | } | |
9555 | /* Must have exactly one info or types section. */ | |
9556 | if (((ids_seen[DW_SECT_INFO] != -1) | |
9557 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
9558 | != 1) | |
9559 | { | |
9560 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
9561 | " DWO info/types section [in module %s]"), | |
9562 | dwp_file->name); | |
9563 | } | |
9564 | /* Must have an abbrev section. */ | |
9565 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
9566 | { | |
9567 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
9568 | " section [in module %s]"), | |
9569 | dwp_file->name); | |
9570 | } | |
9571 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
9572 | htab->section_pool.v2.sizes = | |
9573 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
9574 | * nr_units * nr_columns); | |
9575 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
9576 | * nr_units * nr_columns)) | |
9577 | > index_end) | |
9578 | { | |
9579 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
9580 | " [in module %s]"), | |
9581 | dwp_file->name); | |
9582 | } | |
9583 | } | |
80626a55 DE |
9584 | |
9585 | return htab; | |
9586 | } | |
9587 | ||
9588 | /* Update SECTIONS with the data from SECTP. | |
9589 | ||
9590 | This function is like the other "locate" section routines that are | |
9591 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 9592 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
9593 | |
9594 | The result is non-zero for success, or zero if an error was found. */ | |
9595 | ||
9596 | static int | |
73869dc2 DE |
9597 | locate_v1_virtual_dwo_sections (asection *sectp, |
9598 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
9599 | { |
9600 | const struct dwop_section_names *names = &dwop_section_names; | |
9601 | ||
9602 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9603 | { | |
9604 | /* There can be only one. */ | |
73869dc2 | 9605 | if (sections->abbrev.s.asection != NULL) |
80626a55 | 9606 | return 0; |
73869dc2 | 9607 | sections->abbrev.s.asection = sectp; |
80626a55 DE |
9608 | sections->abbrev.size = bfd_get_section_size (sectp); |
9609 | } | |
9610 | else if (section_is_p (sectp->name, &names->info_dwo) | |
9611 | || section_is_p (sectp->name, &names->types_dwo)) | |
9612 | { | |
9613 | /* There can be only one. */ | |
73869dc2 | 9614 | if (sections->info_or_types.s.asection != NULL) |
80626a55 | 9615 | return 0; |
73869dc2 | 9616 | sections->info_or_types.s.asection = sectp; |
80626a55 DE |
9617 | sections->info_or_types.size = bfd_get_section_size (sectp); |
9618 | } | |
9619 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9620 | { | |
9621 | /* There can be only one. */ | |
73869dc2 | 9622 | if (sections->line.s.asection != NULL) |
80626a55 | 9623 | return 0; |
73869dc2 | 9624 | sections->line.s.asection = sectp; |
80626a55 DE |
9625 | sections->line.size = bfd_get_section_size (sectp); |
9626 | } | |
9627 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9628 | { | |
9629 | /* There can be only one. */ | |
73869dc2 | 9630 | if (sections->loc.s.asection != NULL) |
80626a55 | 9631 | return 0; |
73869dc2 | 9632 | sections->loc.s.asection = sectp; |
80626a55 DE |
9633 | sections->loc.size = bfd_get_section_size (sectp); |
9634 | } | |
9635 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9636 | { | |
9637 | /* There can be only one. */ | |
73869dc2 | 9638 | if (sections->macinfo.s.asection != NULL) |
80626a55 | 9639 | return 0; |
73869dc2 | 9640 | sections->macinfo.s.asection = sectp; |
80626a55 DE |
9641 | sections->macinfo.size = bfd_get_section_size (sectp); |
9642 | } | |
9643 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9644 | { | |
9645 | /* There can be only one. */ | |
73869dc2 | 9646 | if (sections->macro.s.asection != NULL) |
80626a55 | 9647 | return 0; |
73869dc2 | 9648 | sections->macro.s.asection = sectp; |
80626a55 DE |
9649 | sections->macro.size = bfd_get_section_size (sectp); |
9650 | } | |
9651 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9652 | { | |
9653 | /* There can be only one. */ | |
73869dc2 | 9654 | if (sections->str_offsets.s.asection != NULL) |
80626a55 | 9655 | return 0; |
73869dc2 | 9656 | sections->str_offsets.s.asection = sectp; |
80626a55 DE |
9657 | sections->str_offsets.size = bfd_get_section_size (sectp); |
9658 | } | |
9659 | else | |
9660 | { | |
9661 | /* No other kind of section is valid. */ | |
9662 | return 0; | |
9663 | } | |
9664 | ||
9665 | return 1; | |
9666 | } | |
9667 | ||
73869dc2 DE |
9668 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
9669 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
9670 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
9671 | This is for DWP version 1 files. */ | |
80626a55 DE |
9672 | |
9673 | static struct dwo_unit * | |
73869dc2 DE |
9674 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
9675 | uint32_t unit_index, | |
9676 | const char *comp_dir, | |
9677 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
9678 | { |
9679 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
9680 | const struct dwp_hash_table *dwp_htab = |
9681 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
9682 | bfd *dbfd = dwp_file->dbfd; |
9683 | const char *kind = is_debug_types ? "TU" : "CU"; | |
9684 | struct dwo_file *dwo_file; | |
9685 | struct dwo_unit *dwo_unit; | |
73869dc2 | 9686 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
9687 | void **dwo_file_slot; |
9688 | char *virtual_dwo_name; | |
9689 | struct dwarf2_section_info *cutu; | |
9690 | struct cleanup *cleanups; | |
9691 | int i; | |
9692 | ||
73869dc2 DE |
9693 | gdb_assert (dwp_file->version == 1); |
9694 | ||
80626a55 DE |
9695 | if (dwarf2_read_debug) |
9696 | { | |
73869dc2 | 9697 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 9698 | kind, |
73869dc2 | 9699 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
9700 | dwp_file->name); |
9701 | } | |
9702 | ||
19ac8c2e | 9703 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
9704 | Put a limit on the number of sections we look for so that bad data |
9705 | doesn't cause us to loop forever. */ | |
9706 | ||
73869dc2 | 9707 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
9708 | (1 /* .debug_info or .debug_types */ \ |
9709 | + 1 /* .debug_abbrev */ \ | |
9710 | + 1 /* .debug_line */ \ | |
9711 | + 1 /* .debug_loc */ \ | |
9712 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 9713 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
9714 | + 1 /* trailing zero */) |
9715 | ||
9716 | memset (§ions, 0, sizeof (sections)); | |
9717 | cleanups = make_cleanup (null_cleanup, 0); | |
9718 | ||
73869dc2 | 9719 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
9720 | { |
9721 | asection *sectp; | |
9722 | uint32_t section_nr = | |
9723 | read_4_bytes (dbfd, | |
73869dc2 DE |
9724 | dwp_htab->section_pool.v1.indices |
9725 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
9726 | |
9727 | if (section_nr == 0) | |
9728 | break; | |
9729 | if (section_nr >= dwp_file->num_sections) | |
9730 | { | |
9731 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
9732 | " [in module %s]"), | |
9733 | dwp_file->name); | |
9734 | } | |
9735 | ||
9736 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 9737 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
9738 | { |
9739 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
9740 | " [in module %s]"), | |
9741 | dwp_file->name); | |
9742 | } | |
9743 | } | |
9744 | ||
9745 | if (i < 2 | |
a32a8923 DE |
9746 | || dwarf2_section_empty_p (§ions.info_or_types) |
9747 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
9748 | { |
9749 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
9750 | " [in module %s]"), | |
9751 | dwp_file->name); | |
9752 | } | |
73869dc2 | 9753 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
9754 | { |
9755 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
9756 | " [in module %s]"), | |
9757 | dwp_file->name); | |
9758 | } | |
9759 | ||
9760 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
9761 | have dwo_unit "live" in that. At least for now. | |
9762 | ||
9763 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 9764 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
9765 | file, we can combine them back into a virtual DWO file to save space |
9766 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
9767 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
9768 | ||
2792b94d PM |
9769 | virtual_dwo_name = |
9770 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
9771 | get_section_id (§ions.abbrev), |
9772 | get_section_id (§ions.line), | |
9773 | get_section_id (§ions.loc), | |
9774 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
9775 | make_cleanup (xfree, virtual_dwo_name); |
9776 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 9777 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
9778 | /* Create one if necessary. */ |
9779 | if (*dwo_file_slot == NULL) | |
9780 | { | |
9781 | if (dwarf2_read_debug) | |
9782 | { | |
9783 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
9784 | virtual_dwo_name); | |
9785 | } | |
9786 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9787 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, |
9788 | virtual_dwo_name, | |
9789 | strlen (virtual_dwo_name)); | |
9790 | dwo_file->comp_dir = comp_dir; | |
80626a55 DE |
9791 | dwo_file->sections.abbrev = sections.abbrev; |
9792 | dwo_file->sections.line = sections.line; | |
9793 | dwo_file->sections.loc = sections.loc; | |
9794 | dwo_file->sections.macinfo = sections.macinfo; | |
9795 | dwo_file->sections.macro = sections.macro; | |
9796 | dwo_file->sections.str_offsets = sections.str_offsets; | |
9797 | /* The "str" section is global to the entire DWP file. */ | |
9798 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 9799 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
9800 | there's no need to record it in dwo_file. |
9801 | Also, we can't simply record type sections in dwo_file because | |
9802 | we record a pointer into the vector in dwo_unit. As we collect more | |
9803 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
9804 | for it, invalidating all copies of pointers into the previous |
9805 | contents. */ | |
80626a55 DE |
9806 | *dwo_file_slot = dwo_file; |
9807 | } | |
9808 | else | |
9809 | { | |
9810 | if (dwarf2_read_debug) | |
9811 | { | |
9812 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
9813 | virtual_dwo_name); | |
9814 | } | |
9815 | dwo_file = *dwo_file_slot; | |
9816 | } | |
9817 | do_cleanups (cleanups); | |
9818 | ||
9819 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9820 | dwo_unit->dwo_file = dwo_file; | |
9821 | dwo_unit->signature = signature; | |
8a0459fd DE |
9822 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, |
9823 | sizeof (struct dwarf2_section_info)); | |
9824 | *dwo_unit->section = sections.info_or_types; | |
57d63ce2 | 9825 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
9826 | |
9827 | return dwo_unit; | |
9828 | } | |
9829 | ||
73869dc2 DE |
9830 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
9831 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
9832 | piece within that section used by a TU/CU, return a virtual section | |
9833 | of just that piece. */ | |
9834 | ||
9835 | static struct dwarf2_section_info | |
9836 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
9837 | bfd_size_type offset, bfd_size_type size) | |
9838 | { | |
9839 | struct dwarf2_section_info result; | |
9840 | asection *sectp; | |
9841 | ||
9842 | gdb_assert (section != NULL); | |
9843 | gdb_assert (!section->is_virtual); | |
9844 | ||
9845 | memset (&result, 0, sizeof (result)); | |
9846 | result.s.containing_section = section; | |
9847 | result.is_virtual = 1; | |
9848 | ||
9849 | if (size == 0) | |
9850 | return result; | |
9851 | ||
9852 | sectp = get_section_bfd_section (section); | |
9853 | ||
9854 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
9855 | bounds of the real section. This is a pretty-rare event, so just | |
9856 | flag an error (easier) instead of a warning and trying to cope. */ | |
9857 | if (sectp == NULL | |
9858 | || offset + size > bfd_get_section_size (sectp)) | |
9859 | { | |
9860 | bfd *abfd = sectp->owner; | |
9861 | ||
9862 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
9863 | " in section %s [in module %s]"), | |
9864 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
9865 | objfile_name (dwarf2_per_objfile->objfile)); | |
9866 | } | |
9867 | ||
9868 | result.virtual_offset = offset; | |
9869 | result.size = size; | |
9870 | return result; | |
9871 | } | |
9872 | ||
9873 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
9874 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
9875 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
9876 | This is for DWP version 2 files. */ | |
9877 | ||
9878 | static struct dwo_unit * | |
9879 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
9880 | uint32_t unit_index, | |
9881 | const char *comp_dir, | |
9882 | ULONGEST signature, int is_debug_types) | |
9883 | { | |
9884 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9885 | const struct dwp_hash_table *dwp_htab = | |
9886 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9887 | bfd *dbfd = dwp_file->dbfd; | |
9888 | const char *kind = is_debug_types ? "TU" : "CU"; | |
9889 | struct dwo_file *dwo_file; | |
9890 | struct dwo_unit *dwo_unit; | |
9891 | struct virtual_v2_dwo_sections sections; | |
9892 | void **dwo_file_slot; | |
9893 | char *virtual_dwo_name; | |
9894 | struct dwarf2_section_info *cutu; | |
9895 | struct cleanup *cleanups; | |
9896 | int i; | |
9897 | ||
9898 | gdb_assert (dwp_file->version == 2); | |
9899 | ||
9900 | if (dwarf2_read_debug) | |
9901 | { | |
9902 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
9903 | kind, | |
9904 | pulongest (unit_index), hex_string (signature), | |
9905 | dwp_file->name); | |
9906 | } | |
9907 | ||
9908 | /* Fetch the section offsets of this DWO unit. */ | |
9909 | ||
9910 | memset (§ions, 0, sizeof (sections)); | |
9911 | cleanups = make_cleanup (null_cleanup, 0); | |
9912 | ||
9913 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
9914 | { | |
9915 | uint32_t offset = read_4_bytes (dbfd, | |
9916 | dwp_htab->section_pool.v2.offsets | |
9917 | + (((unit_index - 1) * dwp_htab->nr_columns | |
9918 | + i) | |
9919 | * sizeof (uint32_t))); | |
9920 | uint32_t size = read_4_bytes (dbfd, | |
9921 | dwp_htab->section_pool.v2.sizes | |
9922 | + (((unit_index - 1) * dwp_htab->nr_columns | |
9923 | + i) | |
9924 | * sizeof (uint32_t))); | |
9925 | ||
9926 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
9927 | { | |
9928 | case DW_SECT_INFO: | |
9929 | case DW_SECT_TYPES: | |
9930 | sections.info_or_types_offset = offset; | |
9931 | sections.info_or_types_size = size; | |
9932 | break; | |
9933 | case DW_SECT_ABBREV: | |
9934 | sections.abbrev_offset = offset; | |
9935 | sections.abbrev_size = size; | |
9936 | break; | |
9937 | case DW_SECT_LINE: | |
9938 | sections.line_offset = offset; | |
9939 | sections.line_size = size; | |
9940 | break; | |
9941 | case DW_SECT_LOC: | |
9942 | sections.loc_offset = offset; | |
9943 | sections.loc_size = size; | |
9944 | break; | |
9945 | case DW_SECT_STR_OFFSETS: | |
9946 | sections.str_offsets_offset = offset; | |
9947 | sections.str_offsets_size = size; | |
9948 | break; | |
9949 | case DW_SECT_MACINFO: | |
9950 | sections.macinfo_offset = offset; | |
9951 | sections.macinfo_size = size; | |
9952 | break; | |
9953 | case DW_SECT_MACRO: | |
9954 | sections.macro_offset = offset; | |
9955 | sections.macro_size = size; | |
9956 | break; | |
9957 | } | |
9958 | } | |
9959 | ||
9960 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
9961 | have dwo_unit "live" in that. At least for now. | |
9962 | ||
9963 | The DWP file can be made up of a random collection of CUs and TUs. | |
9964 | However, for each CU + set of TUs that came from the same original DWO | |
9965 | file, we can combine them back into a virtual DWO file to save space | |
9966 | (fewer struct dwo_file objects to allocate). Remember that for really | |
9967 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
9968 | ||
9969 | virtual_dwo_name = | |
9970 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
9971 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
9972 | (long) (sections.line_size ? sections.line_offset : 0), | |
9973 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
9974 | (long) (sections.str_offsets_size | |
9975 | ? sections.str_offsets_offset : 0)); | |
9976 | make_cleanup (xfree, virtual_dwo_name); | |
9977 | /* Can we use an existing virtual DWO file? */ | |
9978 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
9979 | /* Create one if necessary. */ | |
9980 | if (*dwo_file_slot == NULL) | |
9981 | { | |
9982 | if (dwarf2_read_debug) | |
9983 | { | |
9984 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
9985 | virtual_dwo_name); | |
9986 | } | |
9987 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
9988 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, | |
9989 | virtual_dwo_name, | |
9990 | strlen (virtual_dwo_name)); | |
9991 | dwo_file->comp_dir = comp_dir; | |
9992 | dwo_file->sections.abbrev = | |
9993 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
9994 | sections.abbrev_offset, sections.abbrev_size); | |
9995 | dwo_file->sections.line = | |
9996 | create_dwp_v2_section (&dwp_file->sections.line, | |
9997 | sections.line_offset, sections.line_size); | |
9998 | dwo_file->sections.loc = | |
9999 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10000 | sections.loc_offset, sections.loc_size); | |
10001 | dwo_file->sections.macinfo = | |
10002 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10003 | sections.macinfo_offset, sections.macinfo_size); | |
10004 | dwo_file->sections.macro = | |
10005 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10006 | sections.macro_offset, sections.macro_size); | |
10007 | dwo_file->sections.str_offsets = | |
10008 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10009 | sections.str_offsets_offset, | |
10010 | sections.str_offsets_size); | |
10011 | /* The "str" section is global to the entire DWP file. */ | |
10012 | dwo_file->sections.str = dwp_file->sections.str; | |
10013 | /* The info or types section is assigned below to dwo_unit, | |
10014 | there's no need to record it in dwo_file. | |
10015 | Also, we can't simply record type sections in dwo_file because | |
10016 | we record a pointer into the vector in dwo_unit. As we collect more | |
10017 | types we'll grow the vector and eventually have to reallocate space | |
10018 | for it, invalidating all copies of pointers into the previous | |
10019 | contents. */ | |
10020 | *dwo_file_slot = dwo_file; | |
10021 | } | |
10022 | else | |
10023 | { | |
10024 | if (dwarf2_read_debug) | |
10025 | { | |
10026 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10027 | virtual_dwo_name); | |
10028 | } | |
10029 | dwo_file = *dwo_file_slot; | |
10030 | } | |
10031 | do_cleanups (cleanups); | |
10032 | ||
10033 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10034 | dwo_unit->dwo_file = dwo_file; | |
10035 | dwo_unit->signature = signature; | |
10036 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, | |
10037 | sizeof (struct dwarf2_section_info)); | |
10038 | *dwo_unit->section = create_dwp_v2_section (is_debug_types | |
10039 | ? &dwp_file->sections.types | |
10040 | : &dwp_file->sections.info, | |
10041 | sections.info_or_types_offset, | |
10042 | sections.info_or_types_size); | |
10043 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10044 | ||
10045 | return dwo_unit; | |
10046 | } | |
10047 | ||
57d63ce2 DE |
10048 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10049 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10050 | |
10051 | static struct dwo_unit * | |
57d63ce2 DE |
10052 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10053 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10054 | { |
57d63ce2 DE |
10055 | const struct dwp_hash_table *dwp_htab = |
10056 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10057 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10058 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10059 | uint32_t hash = signature & mask; |
10060 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10061 | unsigned int i; | |
10062 | void **slot; | |
10063 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
10064 | ||
10065 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10066 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10067 | slot = htab_find_slot (is_debug_types |
10068 | ? dwp_file->loaded_tus | |
10069 | : dwp_file->loaded_cus, | |
10070 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10071 | |
10072 | if (*slot != NULL) | |
10073 | return *slot; | |
10074 | ||
10075 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10076 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10077 | { |
10078 | ULONGEST signature_in_table; | |
10079 | ||
10080 | signature_in_table = | |
57d63ce2 | 10081 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10082 | if (signature_in_table == signature) |
10083 | { | |
57d63ce2 DE |
10084 | uint32_t unit_index = |
10085 | read_4_bytes (dbfd, | |
10086 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10087 | |
73869dc2 DE |
10088 | if (dwp_file->version == 1) |
10089 | { | |
10090 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10091 | comp_dir, signature, | |
10092 | is_debug_types); | |
10093 | } | |
10094 | else | |
10095 | { | |
10096 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10097 | comp_dir, signature, | |
10098 | is_debug_types); | |
10099 | } | |
80626a55 DE |
10100 | return *slot; |
10101 | } | |
10102 | if (signature_in_table == 0) | |
10103 | return NULL; | |
10104 | hash = (hash + hash2) & mask; | |
10105 | } | |
10106 | ||
10107 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10108 | " [in module %s]"), | |
10109 | dwp_file->name); | |
10110 | } | |
10111 | ||
ab5088bf | 10112 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10113 | Open the file specified by FILE_NAME and hand it off to BFD for |
10114 | preliminary analysis. Return a newly initialized bfd *, which | |
10115 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10116 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10117 | SEARCH_CWD is true if the current directory is to be searched. |
10118 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10119 | If successful, the file is added to the bfd include table of the |
10120 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10121 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10122 | NOTE: This function is derived from symfile_bfd_open. */ |
10123 | ||
10124 | static bfd * | |
6ac97d4c | 10125 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
10126 | { |
10127 | bfd *sym_bfd; | |
80626a55 | 10128 | int desc, flags; |
3019eac3 | 10129 | char *absolute_name; |
9c02c129 DE |
10130 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10131 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10132 | to debug_file_directory. */ | |
10133 | char *search_path; | |
10134 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10135 | ||
6ac97d4c DE |
10136 | if (search_cwd) |
10137 | { | |
10138 | if (*debug_file_directory != '\0') | |
10139 | search_path = concat (".", dirname_separator_string, | |
10140 | debug_file_directory, NULL); | |
10141 | else | |
10142 | search_path = xstrdup ("."); | |
10143 | } | |
9c02c129 | 10144 | else |
6ac97d4c | 10145 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10146 | |
492c0ab7 | 10147 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10148 | if (is_dwp) |
10149 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10150 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10151 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10152 | xfree (search_path); |
3019eac3 DE |
10153 | if (desc < 0) |
10154 | return NULL; | |
10155 | ||
bb397797 | 10156 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 10157 | xfree (absolute_name); |
9c02c129 DE |
10158 | if (sym_bfd == NULL) |
10159 | return NULL; | |
3019eac3 DE |
10160 | bfd_set_cacheable (sym_bfd, 1); |
10161 | ||
10162 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
10163 | { | |
cbb099e8 | 10164 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
10165 | return NULL; |
10166 | } | |
10167 | ||
13aaf454 DE |
10168 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10169 | This is important because things like demangled_names_hash lives in the | |
10170 | objfile's per_bfd space and may have references to things like symbol | |
10171 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
10172 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd); | |
10173 | ||
3019eac3 DE |
10174 | return sym_bfd; |
10175 | } | |
10176 | ||
ab5088bf | 10177 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10178 | COMP_DIR is the DW_AT_comp_dir attribute. |
10179 | The result is the bfd handle of the file. | |
10180 | If there is a problem finding or opening the file, return NULL. | |
10181 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10182 | same as symfile_bfd_open. */ | |
10183 | ||
10184 | static bfd * | |
ab5088bf | 10185 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
10186 | { |
10187 | bfd *abfd; | |
3019eac3 | 10188 | |
80626a55 | 10189 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10190 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10191 | |
10192 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10193 | ||
10194 | if (comp_dir != NULL) | |
10195 | { | |
80626a55 | 10196 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
10197 | |
10198 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10199 | search path, which seems useful. */ | |
6ac97d4c | 10200 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10201 | xfree (path_to_try); |
10202 | if (abfd != NULL) | |
10203 | return abfd; | |
10204 | } | |
10205 | ||
10206 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10207 | is a list of paths. */ | |
10208 | ||
10209 | if (*debug_file_directory == '\0') | |
10210 | return NULL; | |
10211 | ||
6ac97d4c | 10212 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10213 | } |
10214 | ||
80626a55 DE |
10215 | /* This function is mapped across the sections and remembers the offset and |
10216 | size of each of the DWO debugging sections we are interested in. */ | |
10217 | ||
10218 | static void | |
10219 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10220 | { | |
10221 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
10222 | const struct dwop_section_names *names = &dwop_section_names; | |
10223 | ||
10224 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10225 | { | |
73869dc2 | 10226 | dwo_sections->abbrev.s.asection = sectp; |
80626a55 DE |
10227 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10228 | } | |
10229 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10230 | { | |
73869dc2 | 10231 | dwo_sections->info.s.asection = sectp; |
80626a55 DE |
10232 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10233 | } | |
10234 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10235 | { | |
73869dc2 | 10236 | dwo_sections->line.s.asection = sectp; |
80626a55 DE |
10237 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10238 | } | |
10239 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10240 | { | |
73869dc2 | 10241 | dwo_sections->loc.s.asection = sectp; |
80626a55 DE |
10242 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10243 | } | |
10244 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10245 | { | |
73869dc2 | 10246 | dwo_sections->macinfo.s.asection = sectp; |
80626a55 DE |
10247 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10248 | } | |
10249 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10250 | { | |
73869dc2 | 10251 | dwo_sections->macro.s.asection = sectp; |
80626a55 DE |
10252 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10253 | } | |
10254 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10255 | { | |
73869dc2 | 10256 | dwo_sections->str.s.asection = sectp; |
80626a55 DE |
10257 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10258 | } | |
10259 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10260 | { | |
73869dc2 | 10261 | dwo_sections->str_offsets.s.asection = sectp; |
80626a55 DE |
10262 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10263 | } | |
10264 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10265 | { | |
10266 | struct dwarf2_section_info type_section; | |
10267 | ||
10268 | memset (&type_section, 0, sizeof (type_section)); | |
73869dc2 | 10269 | type_section.s.asection = sectp; |
80626a55 DE |
10270 | type_section.size = bfd_get_section_size (sectp); |
10271 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10272 | &type_section); | |
10273 | } | |
10274 | } | |
10275 | ||
ab5088bf | 10276 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10277 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10278 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10279 | |
10280 | static struct dwo_file * | |
0ac5b59e DE |
10281 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10282 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10283 | { |
10284 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10285 | struct dwo_file *dwo_file; |
10286 | bfd *dbfd; | |
3019eac3 DE |
10287 | struct cleanup *cleanups; |
10288 | ||
ab5088bf | 10289 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
10290 | if (dbfd == NULL) |
10291 | { | |
10292 | if (dwarf2_read_debug) | |
10293 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
10294 | return NULL; | |
10295 | } | |
10296 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10297 | dwo_file->dwo_name = dwo_name; |
10298 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 10299 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
10300 | |
10301 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10302 | ||
80626a55 | 10303 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 10304 | |
19c3d4c9 | 10305 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
10306 | |
10307 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
10308 | dwo_file->sections.types); | |
10309 | ||
10310 | discard_cleanups (cleanups); | |
10311 | ||
80626a55 DE |
10312 | if (dwarf2_read_debug) |
10313 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
10314 | ||
3019eac3 DE |
10315 | return dwo_file; |
10316 | } | |
10317 | ||
80626a55 | 10318 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10319 | size of each of the DWP debugging sections common to version 1 and 2 that |
10320 | we are interested in. */ | |
3019eac3 | 10321 | |
80626a55 | 10322 | static void |
73869dc2 DE |
10323 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10324 | void *dwp_file_ptr) | |
3019eac3 | 10325 | { |
80626a55 DE |
10326 | struct dwp_file *dwp_file = dwp_file_ptr; |
10327 | const struct dwop_section_names *names = &dwop_section_names; | |
10328 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10329 | |
80626a55 | 10330 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10331 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10332 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10333 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10334 | |
80626a55 DE |
10335 | /* Look for specific sections that we need. */ |
10336 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10337 | { | |
73869dc2 | 10338 | dwp_file->sections.str.s.asection = sectp; |
80626a55 DE |
10339 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10340 | } | |
10341 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10342 | { | |
73869dc2 | 10343 | dwp_file->sections.cu_index.s.asection = sectp; |
80626a55 DE |
10344 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
10345 | } | |
10346 | else if (section_is_p (sectp->name, &names->tu_index)) | |
10347 | { | |
73869dc2 | 10348 | dwp_file->sections.tu_index.s.asection = sectp; |
80626a55 DE |
10349 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
10350 | } | |
10351 | } | |
3019eac3 | 10352 | |
73869dc2 DE |
10353 | /* This function is mapped across the sections and remembers the offset and |
10354 | size of each of the DWP version 2 debugging sections that we are interested | |
10355 | in. This is split into a separate function because we don't know if we | |
10356 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
10357 | ||
10358 | static void | |
10359 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
10360 | { | |
10361 | struct dwp_file *dwp_file = dwp_file_ptr; | |
10362 | const struct dwop_section_names *names = &dwop_section_names; | |
10363 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
10364 | ||
10365 | /* Record the ELF section number for later lookup: this is what the | |
10366 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
10367 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
10368 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
10369 | ||
10370 | /* Look for specific sections that we need. */ | |
10371 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10372 | { | |
10373 | dwp_file->sections.abbrev.s.asection = sectp; | |
10374 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); | |
10375 | } | |
10376 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10377 | { | |
10378 | dwp_file->sections.info.s.asection = sectp; | |
10379 | dwp_file->sections.info.size = bfd_get_section_size (sectp); | |
10380 | } | |
10381 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10382 | { | |
10383 | dwp_file->sections.line.s.asection = sectp; | |
10384 | dwp_file->sections.line.size = bfd_get_section_size (sectp); | |
10385 | } | |
10386 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10387 | { | |
10388 | dwp_file->sections.loc.s.asection = sectp; | |
10389 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); | |
10390 | } | |
10391 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10392 | { | |
10393 | dwp_file->sections.macinfo.s.asection = sectp; | |
10394 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); | |
10395 | } | |
10396 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10397 | { | |
10398 | dwp_file->sections.macro.s.asection = sectp; | |
10399 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); | |
10400 | } | |
10401 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10402 | { | |
10403 | dwp_file->sections.str_offsets.s.asection = sectp; | |
10404 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); | |
10405 | } | |
10406 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10407 | { | |
10408 | dwp_file->sections.types.s.asection = sectp; | |
10409 | dwp_file->sections.types.size = bfd_get_section_size (sectp); | |
10410 | } | |
10411 | } | |
10412 | ||
80626a55 | 10413 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10414 | |
80626a55 DE |
10415 | static hashval_t |
10416 | hash_dwp_loaded_cutus (const void *item) | |
10417 | { | |
10418 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 10419 | |
80626a55 DE |
10420 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
10421 | return dwo_unit->signature; | |
3019eac3 DE |
10422 | } |
10423 | ||
80626a55 | 10424 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10425 | |
80626a55 DE |
10426 | static int |
10427 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 10428 | { |
80626a55 DE |
10429 | const struct dwo_unit *dua = a; |
10430 | const struct dwo_unit *dub = b; | |
3019eac3 | 10431 | |
80626a55 DE |
10432 | return dua->signature == dub->signature; |
10433 | } | |
3019eac3 | 10434 | |
80626a55 | 10435 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 10436 | |
80626a55 DE |
10437 | static htab_t |
10438 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
10439 | { | |
10440 | return htab_create_alloc_ex (3, | |
10441 | hash_dwp_loaded_cutus, | |
10442 | eq_dwp_loaded_cutus, | |
10443 | NULL, | |
10444 | &objfile->objfile_obstack, | |
10445 | hashtab_obstack_allocate, | |
10446 | dummy_obstack_deallocate); | |
10447 | } | |
3019eac3 | 10448 | |
ab5088bf DE |
10449 | /* Try to open DWP file FILE_NAME. |
10450 | The result is the bfd handle of the file. | |
10451 | If there is a problem finding or opening the file, return NULL. | |
10452 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10453 | same as symfile_bfd_open. */ | |
10454 | ||
10455 | static bfd * | |
10456 | open_dwp_file (const char *file_name) | |
10457 | { | |
6ac97d4c DE |
10458 | bfd *abfd; |
10459 | ||
10460 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
10461 | if (abfd != NULL) | |
10462 | return abfd; | |
10463 | ||
10464 | /* Work around upstream bug 15652. | |
10465 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
10466 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
10467 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
10468 | of the executable's path may have discarded the needed info. | |
10469 | [IWBN if the dwp file name was recorded in the executable, akin to | |
10470 | .gnu_debuglink, but that doesn't exist yet.] | |
10471 | Strip the directory from FILE_NAME and search again. */ | |
10472 | if (*debug_file_directory != '\0') | |
10473 | { | |
10474 | /* Don't implicitly search the current directory here. | |
10475 | If the user wants to search "." to handle this case, | |
10476 | it must be added to debug-file-directory. */ | |
10477 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
10478 | 0 /*search_cwd*/); | |
10479 | } | |
10480 | ||
10481 | return NULL; | |
ab5088bf DE |
10482 | } |
10483 | ||
80626a55 DE |
10484 | /* Initialize the use of the DWP file for the current objfile. |
10485 | By convention the name of the DWP file is ${objfile}.dwp. | |
10486 | The result is NULL if it can't be found. */ | |
a766d390 | 10487 | |
80626a55 | 10488 | static struct dwp_file * |
ab5088bf | 10489 | open_and_init_dwp_file (void) |
80626a55 DE |
10490 | { |
10491 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10492 | struct dwp_file *dwp_file; | |
10493 | char *dwp_name; | |
10494 | bfd *dbfd; | |
10495 | struct cleanup *cleanups; | |
10496 | ||
82bf32bc JK |
10497 | /* Try to find first .dwp for the binary file before any symbolic links |
10498 | resolving. */ | |
10499 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
80626a55 DE |
10500 | cleanups = make_cleanup (xfree, dwp_name); |
10501 | ||
ab5088bf | 10502 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
10503 | if (dbfd == NULL |
10504 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
10505 | { | |
10506 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
10507 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
10508 | make_cleanup (xfree, dwp_name); | |
10509 | dbfd = open_dwp_file (dwp_name); | |
10510 | } | |
10511 | ||
80626a55 DE |
10512 | if (dbfd == NULL) |
10513 | { | |
10514 | if (dwarf2_read_debug) | |
10515 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
10516 | do_cleanups (cleanups); | |
10517 | return NULL; | |
3019eac3 | 10518 | } |
80626a55 | 10519 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 10520 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
10521 | dwp_file->dbfd = dbfd; |
10522 | do_cleanups (cleanups); | |
c906108c | 10523 | |
80626a55 DE |
10524 | /* +1: section 0 is unused */ |
10525 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
10526 | dwp_file->elf_sections = | |
10527 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
10528 | dwp_file->num_sections, asection *); | |
10529 | ||
73869dc2 | 10530 | bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file); |
80626a55 DE |
10531 | |
10532 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
10533 | ||
10534 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
10535 | ||
73869dc2 DE |
10536 | /* The DWP file version is stored in the hash table. Oh well. */ |
10537 | if (dwp_file->cus->version != dwp_file->tus->version) | |
10538 | { | |
10539 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 10540 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 10541 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
10542 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
10543 | " TU version %s [in DWP file %s]"), | |
10544 | pulongest (dwp_file->cus->version), | |
10545 | pulongest (dwp_file->tus->version), dwp_name); | |
73869dc2 DE |
10546 | } |
10547 | dwp_file->version = dwp_file->cus->version; | |
10548 | ||
10549 | if (dwp_file->version == 2) | |
10550 | bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file); | |
10551 | ||
19ac8c2e DE |
10552 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
10553 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 10554 | |
80626a55 DE |
10555 | if (dwarf2_read_debug) |
10556 | { | |
10557 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
10558 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
10559 | " %s CUs, %s TUs\n", |
10560 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
10561 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
10562 | } |
10563 | ||
10564 | return dwp_file; | |
3019eac3 | 10565 | } |
c906108c | 10566 | |
ab5088bf DE |
10567 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
10568 | ||
10569 | static struct dwp_file * | |
10570 | get_dwp_file (void) | |
10571 | { | |
10572 | if (! dwarf2_per_objfile->dwp_checked) | |
10573 | { | |
10574 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
10575 | dwarf2_per_objfile->dwp_checked = 1; | |
10576 | } | |
10577 | return dwarf2_per_objfile->dwp_file; | |
10578 | } | |
10579 | ||
80626a55 DE |
10580 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
10581 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
10582 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 10583 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
10584 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
10585 | ||
10586 | This is called, for example, when wanting to read a variable with a | |
10587 | complex location. Therefore we don't want to do file i/o for every call. | |
10588 | Therefore we don't want to look for a DWO file on every call. | |
10589 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
10590 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
10591 | for a DWO file. | |
10592 | ||
1c658ad5 | 10593 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 10594 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 10595 | |
3019eac3 | 10596 | static struct dwo_unit * |
80626a55 DE |
10597 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
10598 | const char *dwo_name, const char *comp_dir, | |
10599 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
10600 | { |
10601 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
10602 | const char *kind = is_debug_types ? "TU" : "CU"; |
10603 | void **dwo_file_slot; | |
3019eac3 | 10604 | struct dwo_file *dwo_file; |
80626a55 | 10605 | struct dwp_file *dwp_file; |
cb1df416 | 10606 | |
6a506a2d DE |
10607 | /* First see if there's a DWP file. |
10608 | If we have a DWP file but didn't find the DWO inside it, don't | |
10609 | look for the original DWO file. It makes gdb behave differently | |
10610 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 10611 | |
ab5088bf | 10612 | dwp_file = get_dwp_file (); |
80626a55 | 10613 | if (dwp_file != NULL) |
cf2c3c16 | 10614 | { |
80626a55 DE |
10615 | const struct dwp_hash_table *dwp_htab = |
10616 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10617 | ||
10618 | if (dwp_htab != NULL) | |
10619 | { | |
10620 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
10621 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
10622 | signature, is_debug_types); | |
80626a55 DE |
10623 | |
10624 | if (dwo_cutu != NULL) | |
10625 | { | |
10626 | if (dwarf2_read_debug) | |
10627 | { | |
10628 | fprintf_unfiltered (gdb_stdlog, | |
10629 | "Virtual DWO %s %s found: @%s\n", | |
10630 | kind, hex_string (signature), | |
10631 | host_address_to_string (dwo_cutu)); | |
10632 | } | |
10633 | return dwo_cutu; | |
10634 | } | |
10635 | } | |
10636 | } | |
6a506a2d | 10637 | else |
80626a55 | 10638 | { |
6a506a2d | 10639 | /* No DWP file, look for the DWO file. */ |
80626a55 | 10640 | |
6a506a2d DE |
10641 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
10642 | if (*dwo_file_slot == NULL) | |
80626a55 | 10643 | { |
6a506a2d DE |
10644 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
10645 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 10646 | } |
6a506a2d DE |
10647 | /* NOTE: This will be NULL if unable to open the file. */ |
10648 | dwo_file = *dwo_file_slot; | |
3019eac3 | 10649 | |
6a506a2d | 10650 | if (dwo_file != NULL) |
19c3d4c9 | 10651 | { |
6a506a2d DE |
10652 | struct dwo_unit *dwo_cutu = NULL; |
10653 | ||
10654 | if (is_debug_types && dwo_file->tus) | |
10655 | { | |
10656 | struct dwo_unit find_dwo_cutu; | |
10657 | ||
10658 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
10659 | find_dwo_cutu.signature = signature; | |
10660 | dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu); | |
10661 | } | |
10662 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 10663 | { |
6a506a2d DE |
10664 | if (signature == dwo_file->cu->signature) |
10665 | dwo_cutu = dwo_file->cu; | |
10666 | } | |
10667 | ||
10668 | if (dwo_cutu != NULL) | |
10669 | { | |
10670 | if (dwarf2_read_debug) | |
10671 | { | |
10672 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
10673 | kind, dwo_name, hex_string (signature), | |
10674 | host_address_to_string (dwo_cutu)); | |
10675 | } | |
10676 | return dwo_cutu; | |
80626a55 DE |
10677 | } |
10678 | } | |
2e276125 | 10679 | } |
9cdd5dbd | 10680 | |
80626a55 DE |
10681 | /* We didn't find it. This could mean a dwo_id mismatch, or |
10682 | someone deleted the DWO/DWP file, or the search path isn't set up | |
10683 | correctly to find the file. */ | |
10684 | ||
10685 | if (dwarf2_read_debug) | |
10686 | { | |
10687 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
10688 | kind, dwo_name, hex_string (signature)); | |
10689 | } | |
3019eac3 | 10690 | |
6656a72d DE |
10691 | /* This is a warning and not a complaint because it can be caused by |
10692 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
10693 | { |
10694 | /* Print the name of the DWP file if we looked there, helps the user | |
10695 | better diagnose the problem. */ | |
10696 | char *dwp_text = NULL; | |
10697 | struct cleanup *cleanups; | |
10698 | ||
10699 | if (dwp_file != NULL) | |
10700 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
10701 | cleanups = make_cleanup (xfree, dwp_text); | |
10702 | ||
10703 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
10704 | " [in module %s]"), | |
10705 | kind, dwo_name, hex_string (signature), | |
10706 | dwp_text != NULL ? dwp_text : "", | |
10707 | this_unit->is_debug_types ? "TU" : "CU", | |
10708 | this_unit->offset.sect_off, objfile_name (objfile)); | |
10709 | ||
10710 | do_cleanups (cleanups); | |
10711 | } | |
3019eac3 | 10712 | return NULL; |
5fb290d7 DJ |
10713 | } |
10714 | ||
80626a55 DE |
10715 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
10716 | See lookup_dwo_cutu_unit for details. */ | |
10717 | ||
10718 | static struct dwo_unit * | |
10719 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
10720 | const char *dwo_name, const char *comp_dir, | |
10721 | ULONGEST signature) | |
10722 | { | |
10723 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
10724 | } | |
10725 | ||
10726 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
10727 | See lookup_dwo_cutu_unit for details. */ | |
10728 | ||
10729 | static struct dwo_unit * | |
10730 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
10731 | const char *dwo_name, const char *comp_dir) | |
10732 | { | |
10733 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
10734 | } | |
10735 | ||
89e63ee4 DE |
10736 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
10737 | ||
10738 | static int | |
10739 | queue_and_load_dwo_tu (void **slot, void *info) | |
10740 | { | |
10741 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
10742 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
10743 | ULONGEST signature = dwo_unit->signature; | |
10744 | struct signatured_type *sig_type = | |
10745 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
10746 | ||
10747 | if (sig_type != NULL) | |
10748 | { | |
10749 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
10750 | ||
10751 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
10752 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
10753 | while processing PER_CU. */ | |
10754 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
10755 | load_full_type_unit (sig_cu); | |
10756 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
10757 | } | |
10758 | ||
10759 | return 1; | |
10760 | } | |
10761 | ||
10762 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
10763 | The DWO may have the only definition of the type, though it may not be | |
10764 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
10765 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
10766 | ||
10767 | static void | |
10768 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
10769 | { | |
10770 | struct dwo_unit *dwo_unit; | |
10771 | struct dwo_file *dwo_file; | |
10772 | ||
10773 | gdb_assert (!per_cu->is_debug_types); | |
10774 | gdb_assert (get_dwp_file () == NULL); | |
10775 | gdb_assert (per_cu->cu != NULL); | |
10776 | ||
10777 | dwo_unit = per_cu->cu->dwo_unit; | |
10778 | gdb_assert (dwo_unit != NULL); | |
10779 | ||
10780 | dwo_file = dwo_unit->dwo_file; | |
10781 | if (dwo_file->tus != NULL) | |
10782 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
10783 | } | |
10784 | ||
3019eac3 DE |
10785 | /* Free all resources associated with DWO_FILE. |
10786 | Close the DWO file and munmap the sections. | |
10787 | All memory should be on the objfile obstack. */ | |
348e048f DE |
10788 | |
10789 | static void | |
3019eac3 | 10790 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 10791 | { |
3019eac3 DE |
10792 | int ix; |
10793 | struct dwarf2_section_info *section; | |
348e048f | 10794 | |
5c6fa7ab | 10795 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 10796 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 10797 | |
3019eac3 DE |
10798 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
10799 | } | |
348e048f | 10800 | |
3019eac3 | 10801 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 10802 | |
3019eac3 DE |
10803 | static void |
10804 | free_dwo_file_cleanup (void *arg) | |
10805 | { | |
10806 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
10807 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 10808 | |
3019eac3 DE |
10809 | free_dwo_file (dwo_file, objfile); |
10810 | } | |
348e048f | 10811 | |
3019eac3 | 10812 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 10813 | |
3019eac3 DE |
10814 | static int |
10815 | free_dwo_file_from_slot (void **slot, void *info) | |
10816 | { | |
10817 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
10818 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 10819 | |
3019eac3 | 10820 | free_dwo_file (dwo_file, objfile); |
348e048f | 10821 | |
3019eac3 DE |
10822 | return 1; |
10823 | } | |
348e048f | 10824 | |
3019eac3 | 10825 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 10826 | |
3019eac3 DE |
10827 | static void |
10828 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
10829 | { | |
10830 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 10831 | } |
3019eac3 DE |
10832 | \f |
10833 | /* Read in various DIEs. */ | |
348e048f | 10834 | |
d389af10 JK |
10835 | /* qsort helper for inherit_abstract_dies. */ |
10836 | ||
10837 | static int | |
10838 | unsigned_int_compar (const void *ap, const void *bp) | |
10839 | { | |
10840 | unsigned int a = *(unsigned int *) ap; | |
10841 | unsigned int b = *(unsigned int *) bp; | |
10842 | ||
10843 | return (a > b) - (b > a); | |
10844 | } | |
10845 | ||
10846 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
10847 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
10848 | already referenced by DW_AT_abstract_origin from the children of the | |
10849 | current DIE. */ | |
d389af10 JK |
10850 | |
10851 | static void | |
10852 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
10853 | { | |
10854 | struct die_info *child_die; | |
10855 | unsigned die_children_count; | |
10856 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
10857 | sect_offset *offsets; |
10858 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
10859 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
10860 | struct die_info *origin_die; | |
10861 | /* Iterator of the ORIGIN_DIE children. */ | |
10862 | struct die_info *origin_child_die; | |
10863 | struct cleanup *cleanups; | |
10864 | struct attribute *attr; | |
cd02d79d PA |
10865 | struct dwarf2_cu *origin_cu; |
10866 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
10867 | |
10868 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
10869 | if (!attr) | |
10870 | return; | |
10871 | ||
cd02d79d PA |
10872 | /* Note that following die references may follow to a die in a |
10873 | different cu. */ | |
10874 | ||
10875 | origin_cu = cu; | |
10876 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
10877 | ||
10878 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
10879 | symbols in. */ | |
10880 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
10881 | origin_cu->list_in_scope = cu->list_in_scope; | |
10882 | ||
edb3359d DJ |
10883 | if (die->tag != origin_die->tag |
10884 | && !(die->tag == DW_TAG_inlined_subroutine | |
10885 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
10886 | complaint (&symfile_complaints, |
10887 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 10888 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
10889 | |
10890 | child_die = die->child; | |
10891 | die_children_count = 0; | |
10892 | while (child_die && child_die->tag) | |
10893 | { | |
10894 | child_die = sibling_die (child_die); | |
10895 | die_children_count++; | |
10896 | } | |
10897 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
10898 | cleanups = make_cleanup (xfree, offsets); | |
10899 | ||
10900 | offsets_end = offsets; | |
10901 | child_die = die->child; | |
10902 | while (child_die && child_die->tag) | |
10903 | { | |
c38f313d DJ |
10904 | /* For each CHILD_DIE, find the corresponding child of |
10905 | ORIGIN_DIE. If there is more than one layer of | |
10906 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
10907 | but GCC versions at least through 4.4 generate this (GCC PR | |
10908 | 40573). */ | |
10909 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 10910 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 10911 | |
c38f313d DJ |
10912 | while (1) |
10913 | { | |
cd02d79d PA |
10914 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
10915 | child_origin_cu); | |
c38f313d DJ |
10916 | if (attr == NULL) |
10917 | break; | |
cd02d79d PA |
10918 | child_origin_die = follow_die_ref (child_origin_die, attr, |
10919 | &child_origin_cu); | |
c38f313d DJ |
10920 | } |
10921 | ||
d389af10 JK |
10922 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
10923 | counterpart may exist. */ | |
c38f313d | 10924 | if (child_origin_die != child_die) |
d389af10 | 10925 | { |
edb3359d DJ |
10926 | if (child_die->tag != child_origin_die->tag |
10927 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
10928 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
10929 | complaint (&symfile_complaints, |
10930 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
10931 | "different tags"), child_die->offset.sect_off, |
10932 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
10933 | if (child_origin_die->parent != origin_die) |
10934 | complaint (&symfile_complaints, | |
10935 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
10936 | "different parents"), child_die->offset.sect_off, |
10937 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
10938 | else |
10939 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
10940 | } |
10941 | child_die = sibling_die (child_die); | |
10942 | } | |
10943 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
10944 | unsigned_int_compar); | |
10945 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 10946 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
10947 | complaint (&symfile_complaints, |
10948 | _("Multiple children of DIE 0x%x refer " | |
10949 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 10950 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
10951 | |
10952 | offsetp = offsets; | |
10953 | origin_child_die = origin_die->child; | |
10954 | while (origin_child_die && origin_child_die->tag) | |
10955 | { | |
10956 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
10957 | while (offsetp < offsets_end |
10958 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 10959 | offsetp++; |
b64f50a1 JK |
10960 | if (offsetp >= offsets_end |
10961 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 | 10962 | { |
adde2bff DE |
10963 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
10964 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
10965 | This can happen with mutually referenced abstract_origins. | |
10966 | PR 16581. */ | |
10967 | if (!origin_child_die->in_process) | |
10968 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
10969 | } |
10970 | origin_child_die = sibling_die (origin_child_die); | |
10971 | } | |
cd02d79d | 10972 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
10973 | |
10974 | do_cleanups (cleanups); | |
10975 | } | |
10976 | ||
c906108c | 10977 | static void |
e7c27a73 | 10978 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10979 | { |
e7c27a73 | 10980 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 10981 | struct context_stack *new; |
c906108c SS |
10982 | CORE_ADDR lowpc; |
10983 | CORE_ADDR highpc; | |
10984 | struct die_info *child_die; | |
edb3359d | 10985 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 10986 | const char *name; |
e142c38c | 10987 | CORE_ADDR baseaddr; |
801e3a5b | 10988 | struct block *block; |
edb3359d | 10989 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
10990 | VEC (symbolp) *template_args = NULL; |
10991 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
10992 | |
10993 | if (inlined_func) | |
10994 | { | |
10995 | /* If we do not have call site information, we can't show the | |
10996 | caller of this inlined function. That's too confusing, so | |
10997 | only use the scope for local variables. */ | |
10998 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
10999 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11000 | if (call_line == NULL || call_file == NULL) | |
11001 | { | |
11002 | read_lexical_block_scope (die, cu); | |
11003 | return; | |
11004 | } | |
11005 | } | |
c906108c | 11006 | |
e142c38c DJ |
11007 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11008 | ||
94af9270 | 11009 | name = dwarf2_name (die, cu); |
c906108c | 11010 | |
e8d05480 JB |
11011 | /* Ignore functions with missing or empty names. These are actually |
11012 | illegal according to the DWARF standard. */ | |
11013 | if (name == NULL) | |
11014 | { | |
11015 | complaint (&symfile_complaints, | |
b64f50a1 JK |
11016 | _("missing name for subprogram DIE at %d"), |
11017 | die->offset.sect_off); | |
e8d05480 JB |
11018 | return; |
11019 | } | |
11020 | ||
11021 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
11022 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
11023 | { | |
ae4d0c03 PM |
11024 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11025 | if (!attr || !DW_UNSND (attr)) | |
11026 | complaint (&symfile_complaints, | |
3e43a32a MS |
11027 | _("cannot get low and high bounds " |
11028 | "for subprogram DIE at %d"), | |
b64f50a1 | 11029 | die->offset.sect_off); |
e8d05480 JB |
11030 | return; |
11031 | } | |
c906108c SS |
11032 | |
11033 | lowpc += baseaddr; | |
11034 | highpc += baseaddr; | |
11035 | ||
34eaf542 TT |
11036 | /* If we have any template arguments, then we must allocate a |
11037 | different sort of symbol. */ | |
11038 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11039 | { | |
11040 | if (child_die->tag == DW_TAG_template_type_param | |
11041 | || child_die->tag == DW_TAG_template_value_param) | |
11042 | { | |
e623cf5d | 11043 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11044 | templ_func->base.is_cplus_template_function = 1; |
11045 | break; | |
11046 | } | |
11047 | } | |
11048 | ||
c906108c | 11049 | new = push_context (0, lowpc); |
34eaf542 TT |
11050 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
11051 | (struct symbol *) templ_func); | |
4c2df51b | 11052 | |
4cecd739 DJ |
11053 | /* If there is a location expression for DW_AT_frame_base, record |
11054 | it. */ | |
e142c38c | 11055 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11056 | if (attr) |
f1e6e072 | 11057 | dwarf2_symbol_mark_computed (attr, new->name, cu, 1); |
4c2df51b | 11058 | |
e142c38c | 11059 | cu->list_in_scope = &local_symbols; |
c906108c | 11060 | |
639d11d3 | 11061 | if (die->child != NULL) |
c906108c | 11062 | { |
639d11d3 | 11063 | child_die = die->child; |
c906108c SS |
11064 | while (child_die && child_die->tag) |
11065 | { | |
34eaf542 TT |
11066 | if (child_die->tag == DW_TAG_template_type_param |
11067 | || child_die->tag == DW_TAG_template_value_param) | |
11068 | { | |
11069 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11070 | ||
f1078f66 DJ |
11071 | if (arg != NULL) |
11072 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11073 | } |
11074 | else | |
11075 | process_die (child_die, cu); | |
c906108c SS |
11076 | child_die = sibling_die (child_die); |
11077 | } | |
11078 | } | |
11079 | ||
d389af10 JK |
11080 | inherit_abstract_dies (die, cu); |
11081 | ||
4a811a97 UW |
11082 | /* If we have a DW_AT_specification, we might need to import using |
11083 | directives from the context of the specification DIE. See the | |
11084 | comment in determine_prefix. */ | |
11085 | if (cu->language == language_cplus | |
11086 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11087 | { | |
11088 | struct dwarf2_cu *spec_cu = cu; | |
11089 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11090 | ||
11091 | while (spec_die) | |
11092 | { | |
11093 | child_die = spec_die->child; | |
11094 | while (child_die && child_die->tag) | |
11095 | { | |
11096 | if (child_die->tag == DW_TAG_imported_module) | |
11097 | process_die (child_die, spec_cu); | |
11098 | child_die = sibling_die (child_die); | |
11099 | } | |
11100 | ||
11101 | /* In some cases, GCC generates specification DIEs that | |
11102 | themselves contain DW_AT_specification attributes. */ | |
11103 | spec_die = die_specification (spec_die, &spec_cu); | |
11104 | } | |
11105 | } | |
11106 | ||
c906108c SS |
11107 | new = pop_context (); |
11108 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
11109 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
11110 | lowpc, highpc, objfile); | |
11111 | ||
df8a16a1 | 11112 | /* For C++, set the block's scope. */ |
195a3f6c | 11113 | if ((cu->language == language_cplus || cu->language == language_fortran) |
4d4ec4e5 | 11114 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11115 | block_set_scope (block, determine_prefix (die, cu), |
11116 | &objfile->objfile_obstack); | |
df8a16a1 | 11117 | |
801e3a5b JB |
11118 | /* If we have address ranges, record them. */ |
11119 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11120 | |
34eaf542 TT |
11121 | /* Attach template arguments to function. */ |
11122 | if (! VEC_empty (symbolp, template_args)) | |
11123 | { | |
11124 | gdb_assert (templ_func != NULL); | |
11125 | ||
11126 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11127 | templ_func->template_arguments | |
11128 | = obstack_alloc (&objfile->objfile_obstack, | |
11129 | (templ_func->n_template_arguments | |
11130 | * sizeof (struct symbol *))); | |
11131 | memcpy (templ_func->template_arguments, | |
11132 | VEC_address (symbolp, template_args), | |
11133 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11134 | VEC_free (symbolp, template_args); | |
11135 | } | |
11136 | ||
208d8187 JB |
11137 | /* In C++, we can have functions nested inside functions (e.g., when |
11138 | a function declares a class that has methods). This means that | |
11139 | when we finish processing a function scope, we may need to go | |
11140 | back to building a containing block's symbol lists. */ | |
11141 | local_symbols = new->locals; | |
27aa8d6a | 11142 | using_directives = new->using_directives; |
208d8187 | 11143 | |
921e78cf JB |
11144 | /* If we've finished processing a top-level function, subsequent |
11145 | symbols go in the file symbol list. */ | |
11146 | if (outermost_context_p ()) | |
e142c38c | 11147 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11148 | } |
11149 | ||
11150 | /* Process all the DIES contained within a lexical block scope. Start | |
11151 | a new scope, process the dies, and then close the scope. */ | |
11152 | ||
11153 | static void | |
e7c27a73 | 11154 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11155 | { |
e7c27a73 | 11156 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 11157 | struct context_stack *new; |
c906108c SS |
11158 | CORE_ADDR lowpc, highpc; |
11159 | struct die_info *child_die; | |
e142c38c DJ |
11160 | CORE_ADDR baseaddr; |
11161 | ||
11162 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11163 | |
11164 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11165 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11166 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11167 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11168 | describe ranges. */ |
d85a05f0 | 11169 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
11170 | return; |
11171 | lowpc += baseaddr; | |
11172 | highpc += baseaddr; | |
11173 | ||
11174 | push_context (0, lowpc); | |
639d11d3 | 11175 | if (die->child != NULL) |
c906108c | 11176 | { |
639d11d3 | 11177 | child_die = die->child; |
c906108c SS |
11178 | while (child_die && child_die->tag) |
11179 | { | |
e7c27a73 | 11180 | process_die (child_die, cu); |
c906108c SS |
11181 | child_die = sibling_die (child_die); |
11182 | } | |
11183 | } | |
11184 | new = pop_context (); | |
11185 | ||
8540c487 | 11186 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 11187 | { |
801e3a5b JB |
11188 | struct block *block |
11189 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
11190 | highpc, objfile); | |
11191 | ||
11192 | /* Note that recording ranges after traversing children, as we | |
11193 | do here, means that recording a parent's ranges entails | |
11194 | walking across all its children's ranges as they appear in | |
11195 | the address map, which is quadratic behavior. | |
11196 | ||
11197 | It would be nicer to record the parent's ranges before | |
11198 | traversing its children, simply overriding whatever you find | |
11199 | there. But since we don't even decide whether to create a | |
11200 | block until after we've traversed its children, that's hard | |
11201 | to do. */ | |
11202 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
11203 | } |
11204 | local_symbols = new->locals; | |
27aa8d6a | 11205 | using_directives = new->using_directives; |
c906108c SS |
11206 | } |
11207 | ||
96408a79 SA |
11208 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
11209 | ||
11210 | static void | |
11211 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11212 | { | |
11213 | struct objfile *objfile = cu->objfile; | |
11214 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11215 | CORE_ADDR pc, baseaddr; | |
11216 | struct attribute *attr; | |
11217 | struct call_site *call_site, call_site_local; | |
11218 | void **slot; | |
11219 | int nparams; | |
11220 | struct die_info *child_die; | |
11221 | ||
11222 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11223 | ||
11224 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11225 | if (!attr) | |
11226 | { | |
11227 | complaint (&symfile_complaints, | |
11228 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
11229 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11230 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11231 | return; |
11232 | } | |
31aa7e4e | 11233 | pc = attr_value_as_address (attr) + baseaddr; |
96408a79 SA |
11234 | |
11235 | if (cu->call_site_htab == NULL) | |
11236 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11237 | NULL, &objfile->objfile_obstack, | |
11238 | hashtab_obstack_allocate, NULL); | |
11239 | call_site_local.pc = pc; | |
11240 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11241 | if (*slot != NULL) | |
11242 | { | |
11243 | complaint (&symfile_complaints, | |
11244 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
11245 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
11246 | paddress (gdbarch, pc), die->offset.sect_off, |
11247 | objfile_name (objfile)); | |
96408a79 SA |
11248 | return; |
11249 | } | |
11250 | ||
11251 | /* Count parameters at the caller. */ | |
11252 | ||
11253 | nparams = 0; | |
11254 | for (child_die = die->child; child_die && child_die->tag; | |
11255 | child_die = sibling_die (child_die)) | |
11256 | { | |
11257 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11258 | { | |
11259 | complaint (&symfile_complaints, | |
11260 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
11261 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
11262 | child_die->tag, child_die->offset.sect_off, |
11263 | objfile_name (objfile)); | |
96408a79 SA |
11264 | continue; |
11265 | } | |
11266 | ||
11267 | nparams++; | |
11268 | } | |
11269 | ||
11270 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
11271 | (sizeof (*call_site) | |
11272 | + (sizeof (*call_site->parameter) | |
11273 | * (nparams - 1)))); | |
11274 | *slot = call_site; | |
11275 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11276 | call_site->pc = pc; | |
11277 | ||
11278 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
11279 | { | |
11280 | struct die_info *func_die; | |
11281 | ||
11282 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
11283 | for (func_die = die->parent; | |
11284 | func_die && func_die->tag != DW_TAG_subprogram | |
11285 | && func_die->tag != DW_TAG_subroutine_type; | |
11286 | func_die = func_die->parent); | |
11287 | ||
11288 | /* DW_AT_GNU_all_call_sites is a superset | |
11289 | of DW_AT_GNU_all_tail_call_sites. */ | |
11290 | if (func_die | |
11291 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
11292 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
11293 | { | |
11294 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
11295 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
11296 | both the initial caller containing the real return address PC and | |
11297 | the final callee containing the current PC of a chain of tail | |
11298 | calls do not need to have the tail call list complete. But any | |
11299 | function candidate for a virtual tail call frame searched via | |
11300 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
11301 | determined unambiguously. */ | |
11302 | } | |
11303 | else | |
11304 | { | |
11305 | struct type *func_type = NULL; | |
11306 | ||
11307 | if (func_die) | |
11308 | func_type = get_die_type (func_die, cu); | |
11309 | if (func_type != NULL) | |
11310 | { | |
11311 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
11312 | ||
11313 | /* Enlist this call site to the function. */ | |
11314 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
11315 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
11316 | } | |
11317 | else | |
11318 | complaint (&symfile_complaints, | |
11319 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
11320 | "DIE 0x%x [in module %s]"), | |
4262abfb | 11321 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11322 | } |
11323 | } | |
11324 | ||
11325 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
11326 | if (attr == NULL) | |
11327 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11328 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
11329 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
11330 | /* Keep NULL DWARF_BLOCK. */; | |
11331 | else if (attr_form_is_block (attr)) | |
11332 | { | |
11333 | struct dwarf2_locexpr_baton *dlbaton; | |
11334 | ||
11335 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
11336 | dlbaton->data = DW_BLOCK (attr)->data; | |
11337 | dlbaton->size = DW_BLOCK (attr)->size; | |
11338 | dlbaton->per_cu = cu->per_cu; | |
11339 | ||
11340 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
11341 | } | |
7771576e | 11342 | else if (attr_form_is_ref (attr)) |
96408a79 | 11343 | { |
96408a79 SA |
11344 | struct dwarf2_cu *target_cu = cu; |
11345 | struct die_info *target_die; | |
11346 | ||
ac9ec31b | 11347 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
11348 | gdb_assert (target_cu->objfile == objfile); |
11349 | if (die_is_declaration (target_die, target_cu)) | |
11350 | { | |
9112db09 JK |
11351 | const char *target_physname = NULL; |
11352 | struct attribute *target_attr; | |
11353 | ||
11354 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
11355 | target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu); | |
11356 | if (target_attr == NULL) | |
11357 | target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name, | |
11358 | target_cu); | |
11359 | if (target_attr != NULL && DW_STRING (target_attr) != NULL) | |
11360 | target_physname = DW_STRING (target_attr); | |
11361 | else | |
11362 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
96408a79 SA |
11363 | if (target_physname == NULL) |
11364 | complaint (&symfile_complaints, | |
11365 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11366 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11367 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 11368 | else |
7d455152 | 11369 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
11370 | } |
11371 | else | |
11372 | { | |
11373 | CORE_ADDR lowpc; | |
11374 | ||
11375 | /* DW_AT_entry_pc should be preferred. */ | |
11376 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
11377 | complaint (&symfile_complaints, | |
11378 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
11379 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 11380 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11381 | else |
11382 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
11383 | } | |
11384 | } | |
11385 | else | |
11386 | complaint (&symfile_complaints, | |
11387 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
11388 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 11389 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11390 | |
11391 | call_site->per_cu = cu->per_cu; | |
11392 | ||
11393 | for (child_die = die->child; | |
11394 | child_die && child_die->tag; | |
11395 | child_die = sibling_die (child_die)) | |
11396 | { | |
96408a79 | 11397 | struct call_site_parameter *parameter; |
1788b2d3 | 11398 | struct attribute *loc, *origin; |
96408a79 SA |
11399 | |
11400 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
11401 | { | |
11402 | /* Already printed the complaint above. */ | |
11403 | continue; | |
11404 | } | |
11405 | ||
11406 | gdb_assert (call_site->parameter_count < nparams); | |
11407 | parameter = &call_site->parameter[call_site->parameter_count]; | |
11408 | ||
1788b2d3 JK |
11409 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
11410 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
11411 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 11412 | |
24c5c679 | 11413 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 11414 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 11415 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
11416 | { |
11417 | sect_offset offset; | |
11418 | ||
11419 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
11420 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
11421 | if (!offset_in_cu_p (&cu->header, offset)) |
11422 | { | |
11423 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
11424 | binding can be done only inside one CU. Such referenced DIE | |
11425 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
11426 | complaint (&symfile_complaints, | |
11427 | _("DW_AT_abstract_origin offset is not in CU for " | |
11428 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11429 | "[in module %s]"), | |
4262abfb | 11430 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
11431 | continue; |
11432 | } | |
1788b2d3 JK |
11433 | parameter->u.param_offset.cu_off = (offset.sect_off |
11434 | - cu->header.offset.sect_off); | |
11435 | } | |
11436 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
11437 | { |
11438 | complaint (&symfile_complaints, | |
11439 | _("No DW_FORM_block* DW_AT_location for " | |
11440 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11441 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11442 | continue; |
11443 | } | |
24c5c679 | 11444 | else |
96408a79 | 11445 | { |
24c5c679 JK |
11446 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
11447 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
11448 | if (parameter->u.dwarf_reg != -1) | |
11449 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
11450 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
11451 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
11452 | ¶meter->u.fb_offset)) | |
11453 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
11454 | else | |
11455 | { | |
11456 | complaint (&symfile_complaints, | |
11457 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
11458 | "for DW_FORM_block* DW_AT_location is supported for " | |
11459 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
11460 | "[in module %s]"), | |
4262abfb | 11461 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
11462 | continue; |
11463 | } | |
96408a79 SA |
11464 | } |
11465 | ||
11466 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
11467 | if (!attr_form_is_block (attr)) | |
11468 | { | |
11469 | complaint (&symfile_complaints, | |
11470 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
11471 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11472 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11473 | continue; |
11474 | } | |
11475 | parameter->value = DW_BLOCK (attr)->data; | |
11476 | parameter->value_size = DW_BLOCK (attr)->size; | |
11477 | ||
11478 | /* Parameters are not pre-cleared by memset above. */ | |
11479 | parameter->data_value = NULL; | |
11480 | parameter->data_value_size = 0; | |
11481 | call_site->parameter_count++; | |
11482 | ||
11483 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
11484 | if (attr) | |
11485 | { | |
11486 | if (!attr_form_is_block (attr)) | |
11487 | complaint (&symfile_complaints, | |
11488 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
11489 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 11490 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
11491 | else |
11492 | { | |
11493 | parameter->data_value = DW_BLOCK (attr)->data; | |
11494 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
11495 | } | |
11496 | } | |
11497 | } | |
11498 | } | |
11499 | ||
43039443 | 11500 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
11501 | Return 1 if the attributes are present and valid, otherwise, return 0. |
11502 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
11503 | |
11504 | static int | |
11505 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
11506 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
11507 | struct partial_symtab *ranges_pst) | |
43039443 JK |
11508 | { |
11509 | struct objfile *objfile = cu->objfile; | |
11510 | struct comp_unit_head *cu_header = &cu->header; | |
11511 | bfd *obfd = objfile->obfd; | |
11512 | unsigned int addr_size = cu_header->addr_size; | |
11513 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11514 | /* Base address selection entry. */ | |
11515 | CORE_ADDR base; | |
11516 | int found_base; | |
11517 | unsigned int dummy; | |
d521ce57 | 11518 | const gdb_byte *buffer; |
43039443 JK |
11519 | CORE_ADDR marker; |
11520 | int low_set; | |
11521 | CORE_ADDR low = 0; | |
11522 | CORE_ADDR high = 0; | |
ff013f42 | 11523 | CORE_ADDR baseaddr; |
43039443 | 11524 | |
d00adf39 DE |
11525 | found_base = cu->base_known; |
11526 | base = cu->base_address; | |
43039443 | 11527 | |
be391dca | 11528 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11529 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
11530 | { |
11531 | complaint (&symfile_complaints, | |
11532 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
11533 | offset); | |
11534 | return 0; | |
11535 | } | |
dce234bc | 11536 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
11537 | |
11538 | /* Read in the largest possible address. */ | |
11539 | marker = read_address (obfd, buffer, cu, &dummy); | |
11540 | if ((marker & mask) == mask) | |
11541 | { | |
11542 | /* If we found the largest possible address, then | |
11543 | read the base address. */ | |
11544 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
11545 | buffer += 2 * addr_size; | |
11546 | offset += 2 * addr_size; | |
11547 | found_base = 1; | |
11548 | } | |
11549 | ||
11550 | low_set = 0; | |
11551 | ||
e7030f15 | 11552 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 11553 | |
43039443 JK |
11554 | while (1) |
11555 | { | |
11556 | CORE_ADDR range_beginning, range_end; | |
11557 | ||
11558 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
11559 | buffer += addr_size; | |
11560 | range_end = read_address (obfd, buffer, cu, &dummy); | |
11561 | buffer += addr_size; | |
11562 | offset += 2 * addr_size; | |
11563 | ||
11564 | /* An end of list marker is a pair of zero addresses. */ | |
11565 | if (range_beginning == 0 && range_end == 0) | |
11566 | /* Found the end of list entry. */ | |
11567 | break; | |
11568 | ||
11569 | /* Each base address selection entry is a pair of 2 values. | |
11570 | The first is the largest possible address, the second is | |
11571 | the base address. Check for a base address here. */ | |
11572 | if ((range_beginning & mask) == mask) | |
11573 | { | |
11574 | /* If we found the largest possible address, then | |
11575 | read the base address. */ | |
11576 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
11577 | found_base = 1; | |
11578 | continue; | |
11579 | } | |
11580 | ||
11581 | if (!found_base) | |
11582 | { | |
11583 | /* We have no valid base address for the ranges | |
11584 | data. */ | |
11585 | complaint (&symfile_complaints, | |
11586 | _("Invalid .debug_ranges data (no base address)")); | |
11587 | return 0; | |
11588 | } | |
11589 | ||
9277c30c UW |
11590 | if (range_beginning > range_end) |
11591 | { | |
11592 | /* Inverted range entries are invalid. */ | |
11593 | complaint (&symfile_complaints, | |
11594 | _("Invalid .debug_ranges data (inverted range)")); | |
11595 | return 0; | |
11596 | } | |
11597 | ||
11598 | /* Empty range entries have no effect. */ | |
11599 | if (range_beginning == range_end) | |
11600 | continue; | |
11601 | ||
43039443 JK |
11602 | range_beginning += base; |
11603 | range_end += base; | |
11604 | ||
01093045 DE |
11605 | /* A not-uncommon case of bad debug info. |
11606 | Don't pollute the addrmap with bad data. */ | |
11607 | if (range_beginning + baseaddr == 0 | |
11608 | && !dwarf2_per_objfile->has_section_at_zero) | |
11609 | { | |
11610 | complaint (&symfile_complaints, | |
11611 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 11612 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
11613 | continue; |
11614 | } | |
11615 | ||
9277c30c | 11616 | if (ranges_pst != NULL) |
ff013f42 | 11617 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
11618 | range_beginning + baseaddr, |
11619 | range_end - 1 + baseaddr, | |
ff013f42 JK |
11620 | ranges_pst); |
11621 | ||
43039443 JK |
11622 | /* FIXME: This is recording everything as a low-high |
11623 | segment of consecutive addresses. We should have a | |
11624 | data structure for discontiguous block ranges | |
11625 | instead. */ | |
11626 | if (! low_set) | |
11627 | { | |
11628 | low = range_beginning; | |
11629 | high = range_end; | |
11630 | low_set = 1; | |
11631 | } | |
11632 | else | |
11633 | { | |
11634 | if (range_beginning < low) | |
11635 | low = range_beginning; | |
11636 | if (range_end > high) | |
11637 | high = range_end; | |
11638 | } | |
11639 | } | |
11640 | ||
11641 | if (! low_set) | |
11642 | /* If the first entry is an end-of-list marker, the range | |
11643 | describes an empty scope, i.e. no instructions. */ | |
11644 | return 0; | |
11645 | ||
11646 | if (low_return) | |
11647 | *low_return = low; | |
11648 | if (high_return) | |
11649 | *high_return = high; | |
11650 | return 1; | |
11651 | } | |
11652 | ||
af34e669 DJ |
11653 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
11654 | are present and valid, otherwise, return 0. Return -1 if the range is | |
11655 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 11656 | |
c906108c | 11657 | static int |
af34e669 | 11658 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
11659 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
11660 | struct partial_symtab *pst) | |
c906108c SS |
11661 | { |
11662 | struct attribute *attr; | |
91da1414 | 11663 | struct attribute *attr_high; |
af34e669 DJ |
11664 | CORE_ADDR low = 0; |
11665 | CORE_ADDR high = 0; | |
11666 | int ret = 0; | |
c906108c | 11667 | |
91da1414 MW |
11668 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11669 | if (attr_high) | |
af34e669 | 11670 | { |
e142c38c | 11671 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 11672 | if (attr) |
91da1414 | 11673 | { |
31aa7e4e JB |
11674 | low = attr_value_as_address (attr); |
11675 | high = attr_value_as_address (attr_high); | |
11676 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
11677 | high += low; | |
91da1414 | 11678 | } |
af34e669 DJ |
11679 | else |
11680 | /* Found high w/o low attribute. */ | |
11681 | return 0; | |
11682 | ||
11683 | /* Found consecutive range of addresses. */ | |
11684 | ret = 1; | |
11685 | } | |
c906108c | 11686 | else |
af34e669 | 11687 | { |
e142c38c | 11688 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
11689 | if (attr != NULL) |
11690 | { | |
ab435259 DE |
11691 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
11692 | We take advantage of the fact that DW_AT_ranges does not appear | |
11693 | in DW_TAG_compile_unit of DWO files. */ | |
11694 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
11695 | unsigned int ranges_offset = (DW_UNSND (attr) | |
11696 | + (need_ranges_base | |
11697 | ? cu->ranges_base | |
11698 | : 0)); | |
2e3cf129 | 11699 | |
af34e669 | 11700 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 11701 | .debug_ranges section. */ |
2e3cf129 | 11702 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 11703 | return 0; |
43039443 | 11704 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
11705 | ret = -1; |
11706 | } | |
11707 | } | |
c906108c | 11708 | |
9373cf26 JK |
11709 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
11710 | if (high <= low) | |
c906108c SS |
11711 | return 0; |
11712 | ||
11713 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
11714 | eliminate duplicate copies of functions and vtables and such. | |
11715 | The linker will arbitrarily choose one and discard the others. | |
11716 | The AT_*_pc values for such functions refer to local labels in | |
11717 | these sections. If the section from that file was discarded, the | |
11718 | labels are not in the output, so the relocs get a value of 0. | |
11719 | If this is a discarded function, mark the pc bounds as invalid, | |
11720 | so that GDB will ignore it. */ | |
72dca2f5 | 11721 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
11722 | return 0; |
11723 | ||
11724 | *lowpc = low; | |
96408a79 SA |
11725 | if (highpc) |
11726 | *highpc = high; | |
af34e669 | 11727 | return ret; |
c906108c SS |
11728 | } |
11729 | ||
b084d499 JB |
11730 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
11731 | its low and high PC addresses. Do nothing if these addresses could not | |
11732 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
11733 | and HIGHPC to the high address if greater than HIGHPC. */ | |
11734 | ||
11735 | static void | |
11736 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
11737 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
11738 | struct dwarf2_cu *cu) | |
11739 | { | |
11740 | CORE_ADDR low, high; | |
11741 | struct die_info *child = die->child; | |
11742 | ||
d85a05f0 | 11743 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
11744 | { |
11745 | *lowpc = min (*lowpc, low); | |
11746 | *highpc = max (*highpc, high); | |
11747 | } | |
11748 | ||
11749 | /* If the language does not allow nested subprograms (either inside | |
11750 | subprograms or lexical blocks), we're done. */ | |
11751 | if (cu->language != language_ada) | |
11752 | return; | |
6e70227d | 11753 | |
b084d499 JB |
11754 | /* Check all the children of the given DIE. If it contains nested |
11755 | subprograms, then check their pc bounds. Likewise, we need to | |
11756 | check lexical blocks as well, as they may also contain subprogram | |
11757 | definitions. */ | |
11758 | while (child && child->tag) | |
11759 | { | |
11760 | if (child->tag == DW_TAG_subprogram | |
11761 | || child->tag == DW_TAG_lexical_block) | |
11762 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
11763 | child = sibling_die (child); | |
11764 | } | |
11765 | } | |
11766 | ||
fae299cd DC |
11767 | /* Get the low and high pc's represented by the scope DIE, and store |
11768 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
11769 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
11770 | ||
11771 | static void | |
11772 | get_scope_pc_bounds (struct die_info *die, | |
11773 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
11774 | struct dwarf2_cu *cu) | |
11775 | { | |
11776 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
11777 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
11778 | CORE_ADDR current_low, current_high; | |
11779 | ||
d85a05f0 | 11780 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
11781 | { |
11782 | best_low = current_low; | |
11783 | best_high = current_high; | |
11784 | } | |
11785 | else | |
11786 | { | |
11787 | struct die_info *child = die->child; | |
11788 | ||
11789 | while (child && child->tag) | |
11790 | { | |
11791 | switch (child->tag) { | |
11792 | case DW_TAG_subprogram: | |
b084d499 | 11793 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
11794 | break; |
11795 | case DW_TAG_namespace: | |
f55ee35c | 11796 | case DW_TAG_module: |
fae299cd DC |
11797 | /* FIXME: carlton/2004-01-16: Should we do this for |
11798 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
11799 | that current GCC's always emit the DIEs corresponding | |
11800 | to definitions of methods of classes as children of a | |
11801 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
11802 | the DIEs giving the declarations, which could be | |
11803 | anywhere). But I don't see any reason why the | |
11804 | standards says that they have to be there. */ | |
11805 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
11806 | ||
11807 | if (current_low != ((CORE_ADDR) -1)) | |
11808 | { | |
11809 | best_low = min (best_low, current_low); | |
11810 | best_high = max (best_high, current_high); | |
11811 | } | |
11812 | break; | |
11813 | default: | |
0963b4bd | 11814 | /* Ignore. */ |
fae299cd DC |
11815 | break; |
11816 | } | |
11817 | ||
11818 | child = sibling_die (child); | |
11819 | } | |
11820 | } | |
11821 | ||
11822 | *lowpc = best_low; | |
11823 | *highpc = best_high; | |
11824 | } | |
11825 | ||
801e3a5b JB |
11826 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
11827 | in DIE. */ | |
380bca97 | 11828 | |
801e3a5b JB |
11829 | static void |
11830 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
11831 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
11832 | { | |
bb5ed363 | 11833 | struct objfile *objfile = cu->objfile; |
801e3a5b | 11834 | struct attribute *attr; |
91da1414 | 11835 | struct attribute *attr_high; |
801e3a5b | 11836 | |
91da1414 MW |
11837 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11838 | if (attr_high) | |
801e3a5b | 11839 | { |
801e3a5b JB |
11840 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
11841 | if (attr) | |
11842 | { | |
31aa7e4e JB |
11843 | CORE_ADDR low = attr_value_as_address (attr); |
11844 | CORE_ADDR high = attr_value_as_address (attr_high); | |
11845 | ||
11846 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
11847 | high += low; | |
9a619af0 | 11848 | |
801e3a5b JB |
11849 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
11850 | } | |
11851 | } | |
11852 | ||
11853 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
11854 | if (attr) | |
11855 | { | |
bb5ed363 | 11856 | bfd *obfd = objfile->obfd; |
ab435259 DE |
11857 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
11858 | We take advantage of the fact that DW_AT_ranges does not appear | |
11859 | in DW_TAG_compile_unit of DWO files. */ | |
11860 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
11861 | |
11862 | /* The value of the DW_AT_ranges attribute is the offset of the | |
11863 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
11864 | unsigned long offset = (DW_UNSND (attr) |
11865 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 11866 | const gdb_byte *buffer; |
801e3a5b JB |
11867 | |
11868 | /* For some target architectures, but not others, the | |
11869 | read_address function sign-extends the addresses it returns. | |
11870 | To recognize base address selection entries, we need a | |
11871 | mask. */ | |
11872 | unsigned int addr_size = cu->header.addr_size; | |
11873 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11874 | ||
11875 | /* The base address, to which the next pair is relative. Note | |
11876 | that this 'base' is a DWARF concept: most entries in a range | |
11877 | list are relative, to reduce the number of relocs against the | |
11878 | debugging information. This is separate from this function's | |
11879 | 'baseaddr' argument, which GDB uses to relocate debugging | |
11880 | information from a shared library based on the address at | |
11881 | which the library was loaded. */ | |
d00adf39 DE |
11882 | CORE_ADDR base = cu->base_address; |
11883 | int base_known = cu->base_known; | |
801e3a5b | 11884 | |
d62bfeaf | 11885 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11886 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
11887 | { |
11888 | complaint (&symfile_complaints, | |
11889 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
11890 | offset); | |
11891 | return; | |
11892 | } | |
d62bfeaf | 11893 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
11894 | |
11895 | for (;;) | |
11896 | { | |
11897 | unsigned int bytes_read; | |
11898 | CORE_ADDR start, end; | |
11899 | ||
11900 | start = read_address (obfd, buffer, cu, &bytes_read); | |
11901 | buffer += bytes_read; | |
11902 | end = read_address (obfd, buffer, cu, &bytes_read); | |
11903 | buffer += bytes_read; | |
11904 | ||
11905 | /* Did we find the end of the range list? */ | |
11906 | if (start == 0 && end == 0) | |
11907 | break; | |
11908 | ||
11909 | /* Did we find a base address selection entry? */ | |
11910 | else if ((start & base_select_mask) == base_select_mask) | |
11911 | { | |
11912 | base = end; | |
11913 | base_known = 1; | |
11914 | } | |
11915 | ||
11916 | /* We found an ordinary address range. */ | |
11917 | else | |
11918 | { | |
11919 | if (!base_known) | |
11920 | { | |
11921 | complaint (&symfile_complaints, | |
3e43a32a MS |
11922 | _("Invalid .debug_ranges data " |
11923 | "(no base address)")); | |
801e3a5b JB |
11924 | return; |
11925 | } | |
11926 | ||
9277c30c UW |
11927 | if (start > end) |
11928 | { | |
11929 | /* Inverted range entries are invalid. */ | |
11930 | complaint (&symfile_complaints, | |
11931 | _("Invalid .debug_ranges data " | |
11932 | "(inverted range)")); | |
11933 | return; | |
11934 | } | |
11935 | ||
11936 | /* Empty range entries have no effect. */ | |
11937 | if (start == end) | |
11938 | continue; | |
11939 | ||
01093045 DE |
11940 | start += base + baseaddr; |
11941 | end += base + baseaddr; | |
11942 | ||
11943 | /* A not-uncommon case of bad debug info. | |
11944 | Don't pollute the addrmap with bad data. */ | |
11945 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
11946 | { | |
11947 | complaint (&symfile_complaints, | |
11948 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 11949 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
11950 | continue; |
11951 | } | |
11952 | ||
11953 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
11954 | } |
11955 | } | |
11956 | } | |
11957 | } | |
11958 | ||
685b1105 JK |
11959 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
11960 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 11961 | |
685b1105 JK |
11962 | static void |
11963 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
11964 | { |
11965 | const char *cs; | |
11966 | int major, minor, release; | |
11967 | ||
11968 | if (cu->producer == NULL) | |
11969 | { | |
11970 | /* For unknown compilers expect their behavior is DWARF version | |
11971 | compliant. | |
11972 | ||
11973 | GCC started to support .debug_types sections by -gdwarf-4 since | |
11974 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
11975 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
11976 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
11977 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 11978 | } |
685b1105 | 11979 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 11980 | { |
685b1105 JK |
11981 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
11982 | ||
ba919b58 TT |
11983 | cs = &cu->producer[strlen ("GNU ")]; |
11984 | while (*cs && !isdigit (*cs)) | |
11985 | cs++; | |
11986 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
11987 | { | |
11988 | /* Not recognized as GCC. */ | |
11989 | } | |
11990 | else | |
1b80a9fa JK |
11991 | { |
11992 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
11993 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
11994 | } | |
685b1105 JK |
11995 | } |
11996 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
11997 | cu->producer_is_icc = 1; | |
11998 | else | |
11999 | { | |
12000 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12001 | compliant. */ | |
60d5a603 JK |
12002 | } |
12003 | ||
ba919b58 | 12004 | cu->checked_producer = 1; |
685b1105 | 12005 | } |
ba919b58 | 12006 | |
685b1105 JK |
12007 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12008 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12009 | during 4.6.0 experimental. */ | |
12010 | ||
12011 | static int | |
12012 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12013 | { | |
12014 | if (!cu->checked_producer) | |
12015 | check_producer (cu); | |
12016 | ||
12017 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12018 | } |
12019 | ||
12020 | /* Return the default accessibility type if it is not overriden by | |
12021 | DW_AT_accessibility. */ | |
12022 | ||
12023 | static enum dwarf_access_attribute | |
12024 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12025 | { | |
12026 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12027 | { | |
12028 | /* The default DWARF 2 accessibility for members is public, the default | |
12029 | accessibility for inheritance is private. */ | |
12030 | ||
12031 | if (die->tag != DW_TAG_inheritance) | |
12032 | return DW_ACCESS_public; | |
12033 | else | |
12034 | return DW_ACCESS_private; | |
12035 | } | |
12036 | else | |
12037 | { | |
12038 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12039 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12040 | depends on the container kind. */ | |
12041 | ||
12042 | if (die->parent->tag == DW_TAG_class_type) | |
12043 | return DW_ACCESS_private; | |
12044 | else | |
12045 | return DW_ACCESS_public; | |
12046 | } | |
12047 | } | |
12048 | ||
74ac6d43 TT |
12049 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12050 | offset. If the attribute was not found return 0, otherwise return | |
12051 | 1. If it was found but could not properly be handled, set *OFFSET | |
12052 | to 0. */ | |
12053 | ||
12054 | static int | |
12055 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12056 | LONGEST *offset) | |
12057 | { | |
12058 | struct attribute *attr; | |
12059 | ||
12060 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12061 | if (attr != NULL) | |
12062 | { | |
12063 | *offset = 0; | |
12064 | ||
12065 | /* Note that we do not check for a section offset first here. | |
12066 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12067 | so if we see it, we can assume that a constant form is really | |
12068 | a constant and not a section offset. */ | |
12069 | if (attr_form_is_constant (attr)) | |
12070 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12071 | else if (attr_form_is_section_offset (attr)) | |
12072 | dwarf2_complex_location_expr_complaint (); | |
12073 | else if (attr_form_is_block (attr)) | |
12074 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12075 | else | |
12076 | dwarf2_complex_location_expr_complaint (); | |
12077 | ||
12078 | return 1; | |
12079 | } | |
12080 | ||
12081 | return 0; | |
12082 | } | |
12083 | ||
c906108c SS |
12084 | /* Add an aggregate field to the field list. */ |
12085 | ||
12086 | static void | |
107d2387 | 12087 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12088 | struct dwarf2_cu *cu) |
6e70227d | 12089 | { |
e7c27a73 | 12090 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12091 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12092 | struct nextfield *new_field; |
12093 | struct attribute *attr; | |
12094 | struct field *fp; | |
15d034d0 | 12095 | const char *fieldname = ""; |
c906108c SS |
12096 | |
12097 | /* Allocate a new field list entry and link it in. */ | |
12098 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 12099 | make_cleanup (xfree, new_field); |
c906108c | 12100 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12101 | |
12102 | if (die->tag == DW_TAG_inheritance) | |
12103 | { | |
12104 | new_field->next = fip->baseclasses; | |
12105 | fip->baseclasses = new_field; | |
12106 | } | |
12107 | else | |
12108 | { | |
12109 | new_field->next = fip->fields; | |
12110 | fip->fields = new_field; | |
12111 | } | |
c906108c SS |
12112 | fip->nfields++; |
12113 | ||
e142c38c | 12114 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12115 | if (attr) |
12116 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12117 | else |
12118 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12119 | if (new_field->accessibility != DW_ACCESS_public) |
12120 | fip->non_public_fields = 1; | |
60d5a603 | 12121 | |
e142c38c | 12122 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12123 | if (attr) |
12124 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12125 | else |
12126 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
12127 | |
12128 | fp = &new_field->field; | |
a9a9bd0f | 12129 | |
e142c38c | 12130 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 12131 | { |
74ac6d43 TT |
12132 | LONGEST offset; |
12133 | ||
a9a9bd0f | 12134 | /* Data member other than a C++ static data member. */ |
6e70227d | 12135 | |
c906108c | 12136 | /* Get type of field. */ |
e7c27a73 | 12137 | fp->type = die_type (die, cu); |
c906108c | 12138 | |
d6a843b5 | 12139 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 12140 | |
c906108c | 12141 | /* Get bit size of field (zero if none). */ |
e142c38c | 12142 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
12143 | if (attr) |
12144 | { | |
12145 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
12146 | } | |
12147 | else | |
12148 | { | |
12149 | FIELD_BITSIZE (*fp) = 0; | |
12150 | } | |
12151 | ||
12152 | /* Get bit offset of field. */ | |
74ac6d43 TT |
12153 | if (handle_data_member_location (die, cu, &offset)) |
12154 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 12155 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
12156 | if (attr) |
12157 | { | |
5e2b427d | 12158 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
12159 | { |
12160 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
12161 | additional bit offset from the MSB of the containing |
12162 | anonymous object to the MSB of the field. We don't | |
12163 | have to do anything special since we don't need to | |
12164 | know the size of the anonymous object. */ | |
f41f5e61 | 12165 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
12166 | } |
12167 | else | |
12168 | { | |
12169 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
12170 | MSB of the anonymous object, subtract off the number of |
12171 | bits from the MSB of the field to the MSB of the | |
12172 | object, and then subtract off the number of bits of | |
12173 | the field itself. The result is the bit offset of | |
12174 | the LSB of the field. */ | |
c906108c SS |
12175 | int anonymous_size; |
12176 | int bit_offset = DW_UNSND (attr); | |
12177 | ||
e142c38c | 12178 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12179 | if (attr) |
12180 | { | |
12181 | /* The size of the anonymous object containing | |
12182 | the bit field is explicit, so use the | |
12183 | indicated size (in bytes). */ | |
12184 | anonymous_size = DW_UNSND (attr); | |
12185 | } | |
12186 | else | |
12187 | { | |
12188 | /* The size of the anonymous object containing | |
12189 | the bit field must be inferred from the type | |
12190 | attribute of the data member containing the | |
12191 | bit field. */ | |
12192 | anonymous_size = TYPE_LENGTH (fp->type); | |
12193 | } | |
f41f5e61 PA |
12194 | SET_FIELD_BITPOS (*fp, |
12195 | (FIELD_BITPOS (*fp) | |
12196 | + anonymous_size * bits_per_byte | |
12197 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
12198 | } |
12199 | } | |
12200 | ||
12201 | /* Get name of field. */ | |
39cbfefa DJ |
12202 | fieldname = dwarf2_name (die, cu); |
12203 | if (fieldname == NULL) | |
12204 | fieldname = ""; | |
d8151005 DJ |
12205 | |
12206 | /* The name is already allocated along with this objfile, so we don't | |
12207 | need to duplicate it for the type. */ | |
12208 | fp->name = fieldname; | |
c906108c SS |
12209 | |
12210 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 12211 | pointer or virtual base class pointer) to private. */ |
e142c38c | 12212 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 12213 | { |
d48cc9dd | 12214 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
12215 | new_field->accessibility = DW_ACCESS_private; |
12216 | fip->non_public_fields = 1; | |
12217 | } | |
12218 | } | |
a9a9bd0f | 12219 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 12220 | { |
a9a9bd0f DC |
12221 | /* C++ static member. */ |
12222 | ||
12223 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
12224 | is a declaration, but all versions of G++ as of this writing | |
12225 | (so through at least 3.2.1) incorrectly generate | |
12226 | DW_TAG_variable tags. */ | |
6e70227d | 12227 | |
ff355380 | 12228 | const char *physname; |
c906108c | 12229 | |
a9a9bd0f | 12230 | /* Get name of field. */ |
39cbfefa DJ |
12231 | fieldname = dwarf2_name (die, cu); |
12232 | if (fieldname == NULL) | |
c906108c SS |
12233 | return; |
12234 | ||
254e6b9e | 12235 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
12236 | if (attr |
12237 | /* Only create a symbol if this is an external value. | |
12238 | new_symbol checks this and puts the value in the global symbol | |
12239 | table, which we want. If it is not external, new_symbol | |
12240 | will try to put the value in cu->list_in_scope which is wrong. */ | |
12241 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
12242 | { |
12243 | /* A static const member, not much different than an enum as far as | |
12244 | we're concerned, except that we can support more types. */ | |
12245 | new_symbol (die, NULL, cu); | |
12246 | } | |
12247 | ||
2df3850c | 12248 | /* Get physical name. */ |
ff355380 | 12249 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 12250 | |
d8151005 DJ |
12251 | /* The name is already allocated along with this objfile, so we don't |
12252 | need to duplicate it for the type. */ | |
12253 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 12254 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 12255 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
12256 | } |
12257 | else if (die->tag == DW_TAG_inheritance) | |
12258 | { | |
74ac6d43 | 12259 | LONGEST offset; |
d4b96c9a | 12260 | |
74ac6d43 TT |
12261 | /* C++ base class field. */ |
12262 | if (handle_data_member_location (die, cu, &offset)) | |
12263 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 12264 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 12265 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
12266 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
12267 | fip->nbaseclasses++; | |
12268 | } | |
12269 | } | |
12270 | ||
98751a41 JK |
12271 | /* Add a typedef defined in the scope of the FIP's class. */ |
12272 | ||
12273 | static void | |
12274 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
12275 | struct dwarf2_cu *cu) | |
6e70227d | 12276 | { |
98751a41 | 12277 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
12278 | struct typedef_field_list *new_field; |
12279 | struct attribute *attr; | |
12280 | struct typedef_field *fp; | |
12281 | char *fieldname = ""; | |
12282 | ||
12283 | /* Allocate a new field list entry and link it in. */ | |
12284 | new_field = xzalloc (sizeof (*new_field)); | |
12285 | make_cleanup (xfree, new_field); | |
12286 | ||
12287 | gdb_assert (die->tag == DW_TAG_typedef); | |
12288 | ||
12289 | fp = &new_field->field; | |
12290 | ||
12291 | /* Get name of field. */ | |
12292 | fp->name = dwarf2_name (die, cu); | |
12293 | if (fp->name == NULL) | |
12294 | return; | |
12295 | ||
12296 | fp->type = read_type_die (die, cu); | |
12297 | ||
12298 | new_field->next = fip->typedef_field_list; | |
12299 | fip->typedef_field_list = new_field; | |
12300 | fip->typedef_field_list_count++; | |
12301 | } | |
12302 | ||
c906108c SS |
12303 | /* Create the vector of fields, and attach it to the type. */ |
12304 | ||
12305 | static void | |
fba45db2 | 12306 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12307 | struct dwarf2_cu *cu) |
c906108c SS |
12308 | { |
12309 | int nfields = fip->nfields; | |
12310 | ||
12311 | /* Record the field count, allocate space for the array of fields, | |
12312 | and create blank accessibility bitfields if necessary. */ | |
12313 | TYPE_NFIELDS (type) = nfields; | |
12314 | TYPE_FIELDS (type) = (struct field *) | |
12315 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
12316 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
12317 | ||
b4ba55a1 | 12318 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
12319 | { |
12320 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12321 | ||
12322 | TYPE_FIELD_PRIVATE_BITS (type) = | |
12323 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12324 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
12325 | ||
12326 | TYPE_FIELD_PROTECTED_BITS (type) = | |
12327 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12328 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
12329 | ||
774b6a14 TT |
12330 | TYPE_FIELD_IGNORE_BITS (type) = |
12331 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
12332 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
12333 | } |
12334 | ||
12335 | /* If the type has baseclasses, allocate and clear a bit vector for | |
12336 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 12337 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
12338 | { |
12339 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 12340 | unsigned char *pointer; |
c906108c SS |
12341 | |
12342 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
12343 | pointer = TYPE_ALLOC (type, num_bytes); |
12344 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
12345 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
12346 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
12347 | } | |
12348 | ||
3e43a32a MS |
12349 | /* Copy the saved-up fields into the field vector. Start from the head of |
12350 | the list, adding to the tail of the field array, so that they end up in | |
12351 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
12352 | while (nfields-- > 0) |
12353 | { | |
7d0ccb61 DJ |
12354 | struct nextfield *fieldp; |
12355 | ||
12356 | if (fip->fields) | |
12357 | { | |
12358 | fieldp = fip->fields; | |
12359 | fip->fields = fieldp->next; | |
12360 | } | |
12361 | else | |
12362 | { | |
12363 | fieldp = fip->baseclasses; | |
12364 | fip->baseclasses = fieldp->next; | |
12365 | } | |
12366 | ||
12367 | TYPE_FIELD (type, nfields) = fieldp->field; | |
12368 | switch (fieldp->accessibility) | |
c906108c | 12369 | { |
c5aa993b | 12370 | case DW_ACCESS_private: |
b4ba55a1 JB |
12371 | if (cu->language != language_ada) |
12372 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 12373 | break; |
c906108c | 12374 | |
c5aa993b | 12375 | case DW_ACCESS_protected: |
b4ba55a1 JB |
12376 | if (cu->language != language_ada) |
12377 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 12378 | break; |
c906108c | 12379 | |
c5aa993b JM |
12380 | case DW_ACCESS_public: |
12381 | break; | |
c906108c | 12382 | |
c5aa993b JM |
12383 | default: |
12384 | /* Unknown accessibility. Complain and treat it as public. */ | |
12385 | { | |
e2e0b3e5 | 12386 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 12387 | fieldp->accessibility); |
c5aa993b JM |
12388 | } |
12389 | break; | |
c906108c SS |
12390 | } |
12391 | if (nfields < fip->nbaseclasses) | |
12392 | { | |
7d0ccb61 | 12393 | switch (fieldp->virtuality) |
c906108c | 12394 | { |
c5aa993b JM |
12395 | case DW_VIRTUALITY_virtual: |
12396 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 12397 | if (cu->language == language_ada) |
a73c6dcd | 12398 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
12399 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
12400 | break; | |
c906108c SS |
12401 | } |
12402 | } | |
c906108c SS |
12403 | } |
12404 | } | |
12405 | ||
7d27a96d TT |
12406 | /* Return true if this member function is a constructor, false |
12407 | otherwise. */ | |
12408 | ||
12409 | static int | |
12410 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
12411 | { | |
12412 | const char *fieldname; | |
12413 | const char *typename; | |
12414 | int len; | |
12415 | ||
12416 | if (die->parent == NULL) | |
12417 | return 0; | |
12418 | ||
12419 | if (die->parent->tag != DW_TAG_structure_type | |
12420 | && die->parent->tag != DW_TAG_union_type | |
12421 | && die->parent->tag != DW_TAG_class_type) | |
12422 | return 0; | |
12423 | ||
12424 | fieldname = dwarf2_name (die, cu); | |
12425 | typename = dwarf2_name (die->parent, cu); | |
12426 | if (fieldname == NULL || typename == NULL) | |
12427 | return 0; | |
12428 | ||
12429 | len = strlen (fieldname); | |
12430 | return (strncmp (fieldname, typename, len) == 0 | |
12431 | && (typename[len] == '\0' || typename[len] == '<')); | |
12432 | } | |
12433 | ||
c906108c SS |
12434 | /* Add a member function to the proper fieldlist. */ |
12435 | ||
12436 | static void | |
107d2387 | 12437 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12438 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 12439 | { |
e7c27a73 | 12440 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12441 | struct attribute *attr; |
12442 | struct fnfieldlist *flp; | |
12443 | int i; | |
12444 | struct fn_field *fnp; | |
15d034d0 | 12445 | const char *fieldname; |
c906108c | 12446 | struct nextfnfield *new_fnfield; |
f792889a | 12447 | struct type *this_type; |
60d5a603 | 12448 | enum dwarf_access_attribute accessibility; |
c906108c | 12449 | |
b4ba55a1 | 12450 | if (cu->language == language_ada) |
a73c6dcd | 12451 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 12452 | |
2df3850c | 12453 | /* Get name of member function. */ |
39cbfefa DJ |
12454 | fieldname = dwarf2_name (die, cu); |
12455 | if (fieldname == NULL) | |
2df3850c | 12456 | return; |
c906108c | 12457 | |
c906108c SS |
12458 | /* Look up member function name in fieldlist. */ |
12459 | for (i = 0; i < fip->nfnfields; i++) | |
12460 | { | |
27bfe10e | 12461 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
12462 | break; |
12463 | } | |
12464 | ||
12465 | /* Create new list element if necessary. */ | |
12466 | if (i < fip->nfnfields) | |
12467 | flp = &fip->fnfieldlists[i]; | |
12468 | else | |
12469 | { | |
12470 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12471 | { | |
12472 | fip->fnfieldlists = (struct fnfieldlist *) | |
12473 | xrealloc (fip->fnfieldlists, | |
12474 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12475 | * sizeof (struct fnfieldlist)); |
c906108c | 12476 | if (fip->nfnfields == 0) |
c13c43fd | 12477 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
12478 | } |
12479 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
12480 | flp->name = fieldname; | |
12481 | flp->length = 0; | |
12482 | flp->head = NULL; | |
3da10d80 | 12483 | i = fip->nfnfields++; |
c906108c SS |
12484 | } |
12485 | ||
12486 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 12487 | entry. */ |
c906108c | 12488 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 12489 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
12490 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
12491 | new_fnfield->next = flp->head; | |
12492 | flp->head = new_fnfield; | |
12493 | flp->length++; | |
12494 | ||
12495 | /* Fill in the member function field info. */ | |
12496 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
12497 | |
12498 | /* Delay processing of the physname until later. */ | |
12499 | if (cu->language == language_cplus || cu->language == language_java) | |
12500 | { | |
12501 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
12502 | die, cu); | |
12503 | } | |
12504 | else | |
12505 | { | |
1d06ead6 | 12506 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
12507 | fnp->physname = physname ? physname : ""; |
12508 | } | |
12509 | ||
c906108c | 12510 | fnp->type = alloc_type (objfile); |
f792889a DJ |
12511 | this_type = read_type_die (die, cu); |
12512 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 12513 | { |
f792889a | 12514 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 12515 | |
f792889a | 12516 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
12517 | of the method itself (TYPE_CODE_METHOD). */ |
12518 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
12519 | TYPE_TARGET_TYPE (this_type), |
12520 | TYPE_FIELDS (this_type), | |
12521 | TYPE_NFIELDS (this_type), | |
12522 | TYPE_VARARGS (this_type)); | |
c906108c SS |
12523 | |
12524 | /* Handle static member functions. | |
c5aa993b | 12525 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
12526 | member functions. G++ helps GDB by marking the first |
12527 | parameter for non-static member functions (which is the this | |
12528 | pointer) as artificial. We obtain this information from | |
12529 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 12530 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
12531 | fnp->voffset = VOFFSET_STATIC; |
12532 | } | |
12533 | else | |
e2e0b3e5 | 12534 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 12535 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
12536 | |
12537 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 12538 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 12539 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 12540 | |
3e43a32a MS |
12541 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
12542 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
12543 | |
12544 | /* Get accessibility. */ | |
e142c38c | 12545 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 12546 | if (attr) |
60d5a603 JK |
12547 | accessibility = DW_UNSND (attr); |
12548 | else | |
12549 | accessibility = dwarf2_default_access_attribute (die, cu); | |
12550 | switch (accessibility) | |
c906108c | 12551 | { |
60d5a603 JK |
12552 | case DW_ACCESS_private: |
12553 | fnp->is_private = 1; | |
12554 | break; | |
12555 | case DW_ACCESS_protected: | |
12556 | fnp->is_protected = 1; | |
12557 | break; | |
c906108c SS |
12558 | } |
12559 | ||
b02dede2 | 12560 | /* Check for artificial methods. */ |
e142c38c | 12561 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
12562 | if (attr && DW_UNSND (attr) != 0) |
12563 | fnp->is_artificial = 1; | |
12564 | ||
7d27a96d TT |
12565 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
12566 | ||
0d564a31 | 12567 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
12568 | function. For older versions of GCC, this is an offset in the |
12569 | appropriate virtual table, as specified by DW_AT_containing_type. | |
12570 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
12571 | to the object address. */ |
12572 | ||
e142c38c | 12573 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 12574 | if (attr) |
8e19ed76 | 12575 | { |
aec5aa8b | 12576 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 12577 | { |
aec5aa8b TT |
12578 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
12579 | { | |
12580 | /* Old-style GCC. */ | |
12581 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
12582 | } | |
12583 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12584 | || (DW_BLOCK (attr)->size > 1 | |
12585 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
12586 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
12587 | { | |
12588 | struct dwarf_block blk; | |
12589 | int offset; | |
12590 | ||
12591 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
12592 | ? 1 : 2); | |
12593 | blk.size = DW_BLOCK (attr)->size - offset; | |
12594 | blk.data = DW_BLOCK (attr)->data + offset; | |
12595 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
12596 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
12597 | dwarf2_complex_location_expr_complaint (); | |
12598 | else | |
12599 | fnp->voffset /= cu->header.addr_size; | |
12600 | fnp->voffset += 2; | |
12601 | } | |
12602 | else | |
12603 | dwarf2_complex_location_expr_complaint (); | |
12604 | ||
12605 | if (!fnp->fcontext) | |
12606 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
12607 | } | |
3690dd37 | 12608 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 12609 | { |
4d3c2250 | 12610 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
12611 | } |
12612 | else | |
12613 | { | |
4d3c2250 KB |
12614 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
12615 | fieldname); | |
8e19ed76 | 12616 | } |
0d564a31 | 12617 | } |
d48cc9dd DJ |
12618 | else |
12619 | { | |
12620 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
12621 | if (attr && DW_UNSND (attr)) | |
12622 | { | |
12623 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
12624 | complaint (&symfile_complaints, | |
3e43a32a MS |
12625 | _("Member function \"%s\" (offset %d) is virtual " |
12626 | "but the vtable offset is not specified"), | |
b64f50a1 | 12627 | fieldname, die->offset.sect_off); |
9655fd1a | 12628 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
12629 | TYPE_CPLUS_DYNAMIC (type) = 1; |
12630 | } | |
12631 | } | |
c906108c SS |
12632 | } |
12633 | ||
12634 | /* Create the vector of member function fields, and attach it to the type. */ | |
12635 | ||
12636 | static void | |
fba45db2 | 12637 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 12638 | struct dwarf2_cu *cu) |
c906108c SS |
12639 | { |
12640 | struct fnfieldlist *flp; | |
c906108c SS |
12641 | int i; |
12642 | ||
b4ba55a1 | 12643 | if (cu->language == language_ada) |
a73c6dcd | 12644 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 12645 | |
c906108c SS |
12646 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
12647 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
12648 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
12649 | ||
12650 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
12651 | { | |
12652 | struct nextfnfield *nfp = flp->head; | |
12653 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
12654 | int k; | |
12655 | ||
12656 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
12657 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
12658 | fn_flp->fn_fields = (struct fn_field *) | |
12659 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
12660 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 12661 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
12662 | } |
12663 | ||
12664 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
12665 | } |
12666 | ||
1168df01 JB |
12667 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
12668 | language, zero otherwise. */ | |
12669 | static int | |
12670 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
12671 | { | |
12672 | static const char vptr[] = "_vptr"; | |
987504bb | 12673 | static const char vtable[] = "vtable"; |
1168df01 | 12674 | |
987504bb JJ |
12675 | /* Look for the C++ and Java forms of the vtable. */ |
12676 | if ((cu->language == language_java | |
12677 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
12678 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
12679 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
12680 | return 1; |
12681 | ||
12682 | return 0; | |
12683 | } | |
12684 | ||
c0dd20ea | 12685 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
12686 | functions, with the ABI-specified layout. If TYPE describes |
12687 | such a structure, smash it into a member function type. | |
61049d3b DJ |
12688 | |
12689 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
12690 | This is GCC PR debug/28767. */ | |
c0dd20ea | 12691 | |
0b92b5bb TT |
12692 | static void |
12693 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 12694 | { |
0b92b5bb | 12695 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
12696 | |
12697 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
12698 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
12699 | return; | |
c0dd20ea DJ |
12700 | |
12701 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
12702 | if (TYPE_FIELD_NAME (type, 0) == NULL |
12703 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
12704 | || TYPE_FIELD_NAME (type, 1) == NULL | |
12705 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
12706 | return; | |
c0dd20ea DJ |
12707 | |
12708 | /* Find the type of the method. */ | |
0b92b5bb | 12709 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
12710 | if (pfn_type == NULL |
12711 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
12712 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 12713 | return; |
c0dd20ea DJ |
12714 | |
12715 | /* Look for the "this" argument. */ | |
12716 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
12717 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 12718 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 12719 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 12720 | return; |
c0dd20ea DJ |
12721 | |
12722 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
12723 | new_type = alloc_type (objfile); |
12724 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
12725 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
12726 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 12727 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 12728 | } |
1168df01 | 12729 | |
685b1105 JK |
12730 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
12731 | (icc). */ | |
12732 | ||
12733 | static int | |
12734 | producer_is_icc (struct dwarf2_cu *cu) | |
12735 | { | |
12736 | if (!cu->checked_producer) | |
12737 | check_producer (cu); | |
12738 | ||
12739 | return cu->producer_is_icc; | |
12740 | } | |
12741 | ||
c906108c | 12742 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
12743 | (definition) to create a type for the structure or union. Fill in |
12744 | the type's name and general properties; the members will not be | |
83655187 DE |
12745 | processed until process_structure_scope. A symbol table entry for |
12746 | the type will also not be done until process_structure_scope (assuming | |
12747 | the type has a name). | |
c906108c | 12748 | |
c767944b DJ |
12749 | NOTE: we need to call these functions regardless of whether or not the |
12750 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 12751 | structure or union. This gets the type entered into our set of |
83655187 | 12752 | user defined types. */ |
c906108c | 12753 | |
f792889a | 12754 | static struct type * |
134d01f1 | 12755 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12756 | { |
e7c27a73 | 12757 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12758 | struct type *type; |
12759 | struct attribute *attr; | |
15d034d0 | 12760 | const char *name; |
c906108c | 12761 | |
348e048f DE |
12762 | /* If the definition of this type lives in .debug_types, read that type. |
12763 | Don't follow DW_AT_specification though, that will take us back up | |
12764 | the chain and we want to go down. */ | |
45e58e77 | 12765 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
12766 | if (attr) |
12767 | { | |
ac9ec31b | 12768 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 12769 | |
ac9ec31b | 12770 | /* The type's CU may not be the same as CU. |
02142a6c | 12771 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
12772 | return set_die_type (die, type, cu); |
12773 | } | |
12774 | ||
c0dd20ea | 12775 | type = alloc_type (objfile); |
c906108c | 12776 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 12777 | |
39cbfefa DJ |
12778 | name = dwarf2_name (die, cu); |
12779 | if (name != NULL) | |
c906108c | 12780 | { |
987504bb JJ |
12781 | if (cu->language == language_cplus |
12782 | || cu->language == language_java) | |
63d06c5c | 12783 | { |
15d034d0 | 12784 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
12785 | |
12786 | /* dwarf2_full_name might have already finished building the DIE's | |
12787 | type. If so, there is no need to continue. */ | |
12788 | if (get_die_type (die, cu) != NULL) | |
12789 | return get_die_type (die, cu); | |
12790 | ||
12791 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
12792 | if (die->tag == DW_TAG_structure_type |
12793 | || die->tag == DW_TAG_class_type) | |
12794 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
12795 | } |
12796 | else | |
12797 | { | |
d8151005 DJ |
12798 | /* The name is already allocated along with this objfile, so |
12799 | we don't need to duplicate it for the type. */ | |
7d455152 | 12800 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
12801 | if (die->tag == DW_TAG_class_type) |
12802 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 12803 | } |
c906108c SS |
12804 | } |
12805 | ||
12806 | if (die->tag == DW_TAG_structure_type) | |
12807 | { | |
12808 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
12809 | } | |
12810 | else if (die->tag == DW_TAG_union_type) | |
12811 | { | |
12812 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
12813 | } | |
12814 | else | |
12815 | { | |
c906108c SS |
12816 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
12817 | } | |
12818 | ||
0cc2414c TT |
12819 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
12820 | TYPE_DECLARED_CLASS (type) = 1; | |
12821 | ||
e142c38c | 12822 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12823 | if (attr) |
12824 | { | |
12825 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12826 | } | |
12827 | else | |
12828 | { | |
12829 | TYPE_LENGTH (type) = 0; | |
12830 | } | |
12831 | ||
685b1105 JK |
12832 | if (producer_is_icc (cu)) |
12833 | { | |
12834 | /* ICC does not output the required DW_AT_declaration | |
12835 | on incomplete types, but gives them a size of zero. */ | |
12836 | } | |
12837 | else | |
12838 | TYPE_STUB_SUPPORTED (type) = 1; | |
12839 | ||
dc718098 | 12840 | if (die_is_declaration (die, cu)) |
876cecd0 | 12841 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
12842 | else if (attr == NULL && die->child == NULL |
12843 | && producer_is_realview (cu->producer)) | |
12844 | /* RealView does not output the required DW_AT_declaration | |
12845 | on incomplete types. */ | |
12846 | TYPE_STUB (type) = 1; | |
dc718098 | 12847 | |
c906108c SS |
12848 | /* We need to add the type field to the die immediately so we don't |
12849 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 12850 | type within the structure itself. */ |
1c379e20 | 12851 | set_die_type (die, type, cu); |
c906108c | 12852 | |
7e314c57 JK |
12853 | /* set_die_type should be already done. */ |
12854 | set_descriptive_type (type, die, cu); | |
12855 | ||
c767944b DJ |
12856 | return type; |
12857 | } | |
12858 | ||
12859 | /* Finish creating a structure or union type, including filling in | |
12860 | its members and creating a symbol for it. */ | |
12861 | ||
12862 | static void | |
12863 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12864 | { | |
12865 | struct objfile *objfile = cu->objfile; | |
12866 | struct die_info *child_die = die->child; | |
12867 | struct type *type; | |
12868 | ||
12869 | type = get_die_type (die, cu); | |
12870 | if (type == NULL) | |
12871 | type = read_structure_type (die, cu); | |
12872 | ||
e142c38c | 12873 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
12874 | { |
12875 | struct field_info fi; | |
12876 | struct die_info *child_die; | |
34eaf542 | 12877 | VEC (symbolp) *template_args = NULL; |
c767944b | 12878 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
12879 | |
12880 | memset (&fi, 0, sizeof (struct field_info)); | |
12881 | ||
639d11d3 | 12882 | child_die = die->child; |
c906108c SS |
12883 | |
12884 | while (child_die && child_die->tag) | |
12885 | { | |
a9a9bd0f DC |
12886 | if (child_die->tag == DW_TAG_member |
12887 | || child_die->tag == DW_TAG_variable) | |
c906108c | 12888 | { |
a9a9bd0f DC |
12889 | /* NOTE: carlton/2002-11-05: A C++ static data member |
12890 | should be a DW_TAG_member that is a declaration, but | |
12891 | all versions of G++ as of this writing (so through at | |
12892 | least 3.2.1) incorrectly generate DW_TAG_variable | |
12893 | tags for them instead. */ | |
e7c27a73 | 12894 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 12895 | } |
8713b1b1 | 12896 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 12897 | { |
0963b4bd | 12898 | /* C++ member function. */ |
e7c27a73 | 12899 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
12900 | } |
12901 | else if (child_die->tag == DW_TAG_inheritance) | |
12902 | { | |
12903 | /* C++ base class field. */ | |
e7c27a73 | 12904 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 12905 | } |
98751a41 JK |
12906 | else if (child_die->tag == DW_TAG_typedef) |
12907 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
12908 | else if (child_die->tag == DW_TAG_template_type_param |
12909 | || child_die->tag == DW_TAG_template_value_param) | |
12910 | { | |
12911 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12912 | ||
f1078f66 DJ |
12913 | if (arg != NULL) |
12914 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
12915 | } |
12916 | ||
c906108c SS |
12917 | child_die = sibling_die (child_die); |
12918 | } | |
12919 | ||
34eaf542 TT |
12920 | /* Attach template arguments to type. */ |
12921 | if (! VEC_empty (symbolp, template_args)) | |
12922 | { | |
12923 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12924 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12925 | = VEC_length (symbolp, template_args); | |
12926 | TYPE_TEMPLATE_ARGUMENTS (type) | |
12927 | = obstack_alloc (&objfile->objfile_obstack, | |
12928 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12929 | * sizeof (struct symbol *))); | |
12930 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
12931 | VEC_address (symbolp, template_args), | |
12932 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12933 | * sizeof (struct symbol *))); | |
12934 | VEC_free (symbolp, template_args); | |
12935 | } | |
12936 | ||
c906108c SS |
12937 | /* Attach fields and member functions to the type. */ |
12938 | if (fi.nfields) | |
e7c27a73 | 12939 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
12940 | if (fi.nfnfields) |
12941 | { | |
e7c27a73 | 12942 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 12943 | |
c5aa993b | 12944 | /* Get the type which refers to the base class (possibly this |
c906108c | 12945 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
12946 | class from the DW_AT_containing_type attribute. This use of |
12947 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 12948 | |
e142c38c | 12949 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 12950 | { |
e7c27a73 | 12951 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
12952 | |
12953 | TYPE_VPTR_BASETYPE (type) = t; | |
12954 | if (type == t) | |
12955 | { | |
c906108c SS |
12956 | int i; |
12957 | ||
12958 | /* Our own class provides vtbl ptr. */ | |
12959 | for (i = TYPE_NFIELDS (t) - 1; | |
12960 | i >= TYPE_N_BASECLASSES (t); | |
12961 | --i) | |
12962 | { | |
0d5cff50 | 12963 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 12964 | |
1168df01 | 12965 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
12966 | { |
12967 | TYPE_VPTR_FIELDNO (type) = i; | |
12968 | break; | |
12969 | } | |
12970 | } | |
12971 | ||
12972 | /* Complain if virtual function table field not found. */ | |
12973 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 12974 | complaint (&symfile_complaints, |
3e43a32a MS |
12975 | _("virtual function table pointer " |
12976 | "not found when defining class '%s'"), | |
4d3c2250 KB |
12977 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
12978 | ""); | |
c906108c SS |
12979 | } |
12980 | else | |
12981 | { | |
12982 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
12983 | } | |
12984 | } | |
f6235d4c EZ |
12985 | else if (cu->producer |
12986 | && strncmp (cu->producer, | |
12987 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
12988 | { | |
12989 | /* The IBM XLC compiler does not provide direct indication | |
12990 | of the containing type, but the vtable pointer is | |
12991 | always named __vfp. */ | |
12992 | ||
12993 | int i; | |
12994 | ||
12995 | for (i = TYPE_NFIELDS (type) - 1; | |
12996 | i >= TYPE_N_BASECLASSES (type); | |
12997 | --i) | |
12998 | { | |
12999 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13000 | { | |
13001 | TYPE_VPTR_FIELDNO (type) = i; | |
13002 | TYPE_VPTR_BASETYPE (type) = type; | |
13003 | break; | |
13004 | } | |
13005 | } | |
13006 | } | |
c906108c | 13007 | } |
98751a41 JK |
13008 | |
13009 | /* Copy fi.typedef_field_list linked list elements content into the | |
13010 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13011 | if (fi.typedef_field_list) | |
13012 | { | |
13013 | int i = fi.typedef_field_list_count; | |
13014 | ||
a0d7a4ff | 13015 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
13016 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
13017 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
13018 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
13019 | ||
13020 | /* Reverse the list order to keep the debug info elements order. */ | |
13021 | while (--i >= 0) | |
13022 | { | |
13023 | struct typedef_field *dest, *src; | |
6e70227d | 13024 | |
98751a41 JK |
13025 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13026 | src = &fi.typedef_field_list->field; | |
13027 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13028 | *dest = *src; | |
13029 | } | |
13030 | } | |
c767944b DJ |
13031 | |
13032 | do_cleanups (back_to); | |
eb2a6f42 TT |
13033 | |
13034 | if (HAVE_CPLUS_STRUCT (type)) | |
13035 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 13036 | } |
63d06c5c | 13037 | |
bb5ed363 | 13038 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13039 | |
90aeadfc DC |
13040 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13041 | snapshots) has been known to create a die giving a declaration | |
13042 | for a class that has, as a child, a die giving a definition for a | |
13043 | nested class. So we have to process our children even if the | |
13044 | current die is a declaration. Normally, of course, a declaration | |
13045 | won't have any children at all. */ | |
134d01f1 | 13046 | |
90aeadfc DC |
13047 | while (child_die != NULL && child_die->tag) |
13048 | { | |
13049 | if (child_die->tag == DW_TAG_member | |
13050 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13051 | || child_die->tag == DW_TAG_inheritance |
13052 | || child_die->tag == DW_TAG_template_value_param | |
13053 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13054 | { |
90aeadfc | 13055 | /* Do nothing. */ |
134d01f1 | 13056 | } |
90aeadfc DC |
13057 | else |
13058 | process_die (child_die, cu); | |
134d01f1 | 13059 | |
90aeadfc | 13060 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13061 | } |
13062 | ||
fa4028e9 JB |
13063 | /* Do not consider external references. According to the DWARF standard, |
13064 | these DIEs are identified by the fact that they have no byte_size | |
13065 | attribute, and a declaration attribute. */ | |
13066 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13067 | || !die_is_declaration (die, cu)) | |
c767944b | 13068 | new_symbol (die, type, cu); |
134d01f1 DJ |
13069 | } |
13070 | ||
55426c9d JB |
13071 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13072 | update TYPE using some information only available in DIE's children. */ | |
13073 | ||
13074 | static void | |
13075 | update_enumeration_type_from_children (struct die_info *die, | |
13076 | struct type *type, | |
13077 | struct dwarf2_cu *cu) | |
13078 | { | |
13079 | struct obstack obstack; | |
13080 | struct die_info *child_die = die->child; | |
13081 | int unsigned_enum = 1; | |
13082 | int flag_enum = 1; | |
13083 | ULONGEST mask = 0; | |
13084 | struct cleanup *old_chain; | |
13085 | ||
13086 | obstack_init (&obstack); | |
13087 | old_chain = make_cleanup_obstack_free (&obstack); | |
13088 | ||
13089 | while (child_die != NULL && child_die->tag) | |
13090 | { | |
13091 | struct attribute *attr; | |
13092 | LONGEST value; | |
13093 | const gdb_byte *bytes; | |
13094 | struct dwarf2_locexpr_baton *baton; | |
13095 | const char *name; | |
13096 | if (child_die->tag != DW_TAG_enumerator) | |
13097 | continue; | |
13098 | ||
13099 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13100 | if (attr == NULL) | |
13101 | continue; | |
13102 | ||
13103 | name = dwarf2_name (child_die, cu); | |
13104 | if (name == NULL) | |
13105 | name = "<anonymous enumerator>"; | |
13106 | ||
13107 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13108 | &value, &bytes, &baton); | |
13109 | if (value < 0) | |
13110 | { | |
13111 | unsigned_enum = 0; | |
13112 | flag_enum = 0; | |
13113 | } | |
13114 | else if ((mask & value) != 0) | |
13115 | flag_enum = 0; | |
13116 | else | |
13117 | mask |= value; | |
13118 | ||
13119 | /* If we already know that the enum type is neither unsigned, nor | |
13120 | a flag type, no need to look at the rest of the enumerates. */ | |
13121 | if (!unsigned_enum && !flag_enum) | |
13122 | break; | |
13123 | child_die = sibling_die (child_die); | |
13124 | } | |
13125 | ||
13126 | if (unsigned_enum) | |
13127 | TYPE_UNSIGNED (type) = 1; | |
13128 | if (flag_enum) | |
13129 | TYPE_FLAG_ENUM (type) = 1; | |
13130 | ||
13131 | do_cleanups (old_chain); | |
13132 | } | |
13133 | ||
134d01f1 DJ |
13134 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
13135 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 13136 | |
f792889a | 13137 | static struct type * |
134d01f1 | 13138 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13139 | { |
e7c27a73 | 13140 | struct objfile *objfile = cu->objfile; |
c906108c | 13141 | struct type *type; |
c906108c | 13142 | struct attribute *attr; |
0114d602 | 13143 | const char *name; |
134d01f1 | 13144 | |
348e048f DE |
13145 | /* If the definition of this type lives in .debug_types, read that type. |
13146 | Don't follow DW_AT_specification though, that will take us back up | |
13147 | the chain and we want to go down. */ | |
45e58e77 | 13148 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13149 | if (attr) |
13150 | { | |
ac9ec31b | 13151 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13152 | |
ac9ec31b | 13153 | /* The type's CU may not be the same as CU. |
02142a6c | 13154 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13155 | return set_die_type (die, type, cu); |
13156 | } | |
13157 | ||
c906108c SS |
13158 | type = alloc_type (objfile); |
13159 | ||
13160 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 13161 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 13162 | if (name != NULL) |
7d455152 | 13163 | TYPE_TAG_NAME (type) = name; |
c906108c | 13164 | |
0626fc76 TT |
13165 | attr = dwarf2_attr (die, DW_AT_type, cu); |
13166 | if (attr != NULL) | |
13167 | { | |
13168 | struct type *underlying_type = die_type (die, cu); | |
13169 | ||
13170 | TYPE_TARGET_TYPE (type) = underlying_type; | |
13171 | } | |
13172 | ||
e142c38c | 13173 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13174 | if (attr) |
13175 | { | |
13176 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13177 | } | |
13178 | else | |
13179 | { | |
13180 | TYPE_LENGTH (type) = 0; | |
13181 | } | |
13182 | ||
137033e9 JB |
13183 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
13184 | declared as private in the package spec, and then defined only | |
13185 | inside the package body. Such types are known as Taft Amendment | |
13186 | Types. When another package uses such a type, an incomplete DIE | |
13187 | may be generated by the compiler. */ | |
02eb380e | 13188 | if (die_is_declaration (die, cu)) |
876cecd0 | 13189 | TYPE_STUB (type) = 1; |
02eb380e | 13190 | |
0626fc76 TT |
13191 | /* Finish the creation of this type by using the enum's children. |
13192 | We must call this even when the underlying type has been provided | |
13193 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
13194 | update_enumeration_type_from_children (die, type, cu); |
13195 | ||
0626fc76 TT |
13196 | /* If this type has an underlying type that is not a stub, then we |
13197 | may use its attributes. We always use the "unsigned" attribute | |
13198 | in this situation, because ordinarily we guess whether the type | |
13199 | is unsigned -- but the guess can be wrong and the underlying type | |
13200 | can tell us the reality. However, we defer to a local size | |
13201 | attribute if one exists, because this lets the compiler override | |
13202 | the underlying type if needed. */ | |
13203 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
13204 | { | |
13205 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
13206 | if (TYPE_LENGTH (type) == 0) | |
13207 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
13208 | } | |
13209 | ||
3d567982 TT |
13210 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
13211 | ||
f792889a | 13212 | return set_die_type (die, type, cu); |
134d01f1 DJ |
13213 | } |
13214 | ||
13215 | /* Given a pointer to a die which begins an enumeration, process all | |
13216 | the dies that define the members of the enumeration, and create the | |
13217 | symbol for the enumeration type. | |
13218 | ||
13219 | NOTE: We reverse the order of the element list. */ | |
13220 | ||
13221 | static void | |
13222 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13223 | { | |
f792889a | 13224 | struct type *this_type; |
134d01f1 | 13225 | |
f792889a DJ |
13226 | this_type = get_die_type (die, cu); |
13227 | if (this_type == NULL) | |
13228 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 13229 | |
639d11d3 | 13230 | if (die->child != NULL) |
c906108c | 13231 | { |
9dc481d3 DE |
13232 | struct die_info *child_die; |
13233 | struct symbol *sym; | |
13234 | struct field *fields = NULL; | |
13235 | int num_fields = 0; | |
15d034d0 | 13236 | const char *name; |
9dc481d3 | 13237 | |
639d11d3 | 13238 | child_die = die->child; |
c906108c SS |
13239 | while (child_die && child_die->tag) |
13240 | { | |
13241 | if (child_die->tag != DW_TAG_enumerator) | |
13242 | { | |
e7c27a73 | 13243 | process_die (child_die, cu); |
c906108c SS |
13244 | } |
13245 | else | |
13246 | { | |
39cbfefa DJ |
13247 | name = dwarf2_name (child_die, cu); |
13248 | if (name) | |
c906108c | 13249 | { |
f792889a | 13250 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
13251 | |
13252 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13253 | { | |
13254 | fields = (struct field *) | |
13255 | xrealloc (fields, | |
13256 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13257 | * sizeof (struct field)); |
c906108c SS |
13258 | } |
13259 | ||
3567439c | 13260 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 13261 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 13262 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
13263 | FIELD_BITSIZE (fields[num_fields]) = 0; |
13264 | ||
13265 | num_fields++; | |
13266 | } | |
13267 | } | |
13268 | ||
13269 | child_die = sibling_die (child_die); | |
13270 | } | |
13271 | ||
13272 | if (num_fields) | |
13273 | { | |
f792889a DJ |
13274 | TYPE_NFIELDS (this_type) = num_fields; |
13275 | TYPE_FIELDS (this_type) = (struct field *) | |
13276 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
13277 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 13278 | sizeof (struct field) * num_fields); |
b8c9b27d | 13279 | xfree (fields); |
c906108c | 13280 | } |
c906108c | 13281 | } |
134d01f1 | 13282 | |
6c83ed52 TT |
13283 | /* If we are reading an enum from a .debug_types unit, and the enum |
13284 | is a declaration, and the enum is not the signatured type in the | |
13285 | unit, then we do not want to add a symbol for it. Adding a | |
13286 | symbol would in some cases obscure the true definition of the | |
13287 | enum, giving users an incomplete type when the definition is | |
13288 | actually available. Note that we do not want to do this for all | |
13289 | enums which are just declarations, because C++0x allows forward | |
13290 | enum declarations. */ | |
3019eac3 | 13291 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
13292 | && die_is_declaration (die, cu)) |
13293 | { | |
52dc124a | 13294 | struct signatured_type *sig_type; |
6c83ed52 | 13295 | |
c0f78cd4 | 13296 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
13297 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
13298 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
13299 | return; |
13300 | } | |
13301 | ||
f792889a | 13302 | new_symbol (die, this_type, cu); |
c906108c SS |
13303 | } |
13304 | ||
13305 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
13306 | the DIE's type field. For now, this only handles one dimensional | |
13307 | arrays. */ | |
13308 | ||
f792889a | 13309 | static struct type * |
e7c27a73 | 13310 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13311 | { |
e7c27a73 | 13312 | struct objfile *objfile = cu->objfile; |
c906108c | 13313 | struct die_info *child_die; |
7e314c57 | 13314 | struct type *type; |
c906108c SS |
13315 | struct type *element_type, *range_type, *index_type; |
13316 | struct type **range_types = NULL; | |
13317 | struct attribute *attr; | |
13318 | int ndim = 0; | |
13319 | struct cleanup *back_to; | |
15d034d0 | 13320 | const char *name; |
dc53a7ad | 13321 | unsigned int bit_stride = 0; |
c906108c | 13322 | |
e7c27a73 | 13323 | element_type = die_type (die, cu); |
c906108c | 13324 | |
7e314c57 JK |
13325 | /* The die_type call above may have already set the type for this DIE. */ |
13326 | type = get_die_type (die, cu); | |
13327 | if (type) | |
13328 | return type; | |
13329 | ||
dc53a7ad JB |
13330 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
13331 | if (attr != NULL) | |
13332 | bit_stride = DW_UNSND (attr) * 8; | |
13333 | ||
13334 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
13335 | if (attr != NULL) | |
13336 | bit_stride = DW_UNSND (attr); | |
13337 | ||
c906108c SS |
13338 | /* Irix 6.2 native cc creates array types without children for |
13339 | arrays with unspecified length. */ | |
639d11d3 | 13340 | if (die->child == NULL) |
c906108c | 13341 | { |
46bf5051 | 13342 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 13343 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
13344 | type = create_array_type_with_stride (NULL, element_type, range_type, |
13345 | bit_stride); | |
f792889a | 13346 | return set_die_type (die, type, cu); |
c906108c SS |
13347 | } |
13348 | ||
13349 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 13350 | child_die = die->child; |
c906108c SS |
13351 | while (child_die && child_die->tag) |
13352 | { | |
13353 | if (child_die->tag == DW_TAG_subrange_type) | |
13354 | { | |
f792889a | 13355 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 13356 | |
f792889a | 13357 | if (child_type != NULL) |
a02abb62 | 13358 | { |
0963b4bd MS |
13359 | /* The range type was succesfully read. Save it for the |
13360 | array type creation. */ | |
a02abb62 JB |
13361 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
13362 | { | |
13363 | range_types = (struct type **) | |
13364 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
13365 | * sizeof (struct type *)); | |
13366 | if (ndim == 0) | |
13367 | make_cleanup (free_current_contents, &range_types); | |
13368 | } | |
f792889a | 13369 | range_types[ndim++] = child_type; |
a02abb62 | 13370 | } |
c906108c SS |
13371 | } |
13372 | child_die = sibling_die (child_die); | |
13373 | } | |
13374 | ||
13375 | /* Dwarf2 dimensions are output from left to right, create the | |
13376 | necessary array types in backwards order. */ | |
7ca2d3a3 | 13377 | |
c906108c | 13378 | type = element_type; |
7ca2d3a3 DL |
13379 | |
13380 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
13381 | { | |
13382 | int i = 0; | |
9a619af0 | 13383 | |
7ca2d3a3 | 13384 | while (i < ndim) |
dc53a7ad JB |
13385 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
13386 | bit_stride); | |
7ca2d3a3 DL |
13387 | } |
13388 | else | |
13389 | { | |
13390 | while (ndim-- > 0) | |
dc53a7ad JB |
13391 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
13392 | bit_stride); | |
7ca2d3a3 | 13393 | } |
c906108c | 13394 | |
f5f8a009 EZ |
13395 | /* Understand Dwarf2 support for vector types (like they occur on |
13396 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
13397 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
13398 | custom vendor extension. The main difference between a regular | |
13399 | array and the vector variant is that vectors are passed by value | |
13400 | to functions. */ | |
e142c38c | 13401 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 13402 | if (attr) |
ea37ba09 | 13403 | make_vector_type (type); |
f5f8a009 | 13404 | |
dbc98a8b KW |
13405 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
13406 | implementation may choose to implement triple vectors using this | |
13407 | attribute. */ | |
13408 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
13409 | if (attr) | |
13410 | { | |
13411 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
13412 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13413 | else | |
3e43a32a MS |
13414 | complaint (&symfile_complaints, |
13415 | _("DW_AT_byte_size for array type smaller " | |
13416 | "than the total size of elements")); | |
dbc98a8b KW |
13417 | } |
13418 | ||
39cbfefa DJ |
13419 | name = dwarf2_name (die, cu); |
13420 | if (name) | |
13421 | TYPE_NAME (type) = name; | |
6e70227d | 13422 | |
0963b4bd | 13423 | /* Install the type in the die. */ |
7e314c57 JK |
13424 | set_die_type (die, type, cu); |
13425 | ||
13426 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13427 | set_descriptive_type (type, die, cu); |
13428 | ||
c906108c SS |
13429 | do_cleanups (back_to); |
13430 | ||
7e314c57 | 13431 | return type; |
c906108c SS |
13432 | } |
13433 | ||
7ca2d3a3 | 13434 | static enum dwarf_array_dim_ordering |
6e70227d | 13435 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
13436 | { |
13437 | struct attribute *attr; | |
13438 | ||
13439 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
13440 | ||
13441 | if (attr) return DW_SND (attr); | |
13442 | ||
0963b4bd MS |
13443 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
13444 | opposite order to the dwarf2 specification, but data is still | |
13445 | laid out as per normal fortran. | |
7ca2d3a3 | 13446 | |
0963b4bd MS |
13447 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
13448 | version checking. */ | |
7ca2d3a3 | 13449 | |
905e0470 PM |
13450 | if (cu->language == language_fortran |
13451 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
13452 | { |
13453 | return DW_ORD_row_major; | |
13454 | } | |
13455 | ||
6e70227d | 13456 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
13457 | { |
13458 | case array_column_major: | |
13459 | return DW_ORD_col_major; | |
13460 | case array_row_major: | |
13461 | default: | |
13462 | return DW_ORD_row_major; | |
13463 | }; | |
13464 | } | |
13465 | ||
72019c9c | 13466 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 13467 | the DIE's type field. */ |
72019c9c | 13468 | |
f792889a | 13469 | static struct type * |
72019c9c GM |
13470 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
13471 | { | |
7e314c57 JK |
13472 | struct type *domain_type, *set_type; |
13473 | struct attribute *attr; | |
f792889a | 13474 | |
7e314c57 JK |
13475 | domain_type = die_type (die, cu); |
13476 | ||
13477 | /* The die_type call above may have already set the type for this DIE. */ | |
13478 | set_type = get_die_type (die, cu); | |
13479 | if (set_type) | |
13480 | return set_type; | |
13481 | ||
13482 | set_type = create_set_type (NULL, domain_type); | |
13483 | ||
13484 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
13485 | if (attr) |
13486 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 13487 | |
f792889a | 13488 | return set_die_type (die, set_type, cu); |
72019c9c | 13489 | } |
7ca2d3a3 | 13490 | |
0971de02 TT |
13491 | /* A helper for read_common_block that creates a locexpr baton. |
13492 | SYM is the symbol which we are marking as computed. | |
13493 | COMMON_DIE is the DIE for the common block. | |
13494 | COMMON_LOC is the location expression attribute for the common | |
13495 | block itself. | |
13496 | MEMBER_LOC is the location expression attribute for the particular | |
13497 | member of the common block that we are processing. | |
13498 | CU is the CU from which the above come. */ | |
13499 | ||
13500 | static void | |
13501 | mark_common_block_symbol_computed (struct symbol *sym, | |
13502 | struct die_info *common_die, | |
13503 | struct attribute *common_loc, | |
13504 | struct attribute *member_loc, | |
13505 | struct dwarf2_cu *cu) | |
13506 | { | |
13507 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13508 | struct dwarf2_locexpr_baton *baton; | |
13509 | gdb_byte *ptr; | |
13510 | unsigned int cu_off; | |
13511 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
13512 | LONGEST offset = 0; | |
13513 | ||
13514 | gdb_assert (common_loc && member_loc); | |
13515 | gdb_assert (attr_form_is_block (common_loc)); | |
13516 | gdb_assert (attr_form_is_block (member_loc) | |
13517 | || attr_form_is_constant (member_loc)); | |
13518 | ||
13519 | baton = obstack_alloc (&objfile->objfile_obstack, | |
13520 | sizeof (struct dwarf2_locexpr_baton)); | |
13521 | baton->per_cu = cu->per_cu; | |
13522 | gdb_assert (baton->per_cu); | |
13523 | ||
13524 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
13525 | ||
13526 | if (attr_form_is_constant (member_loc)) | |
13527 | { | |
13528 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
13529 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
13530 | } | |
13531 | else | |
13532 | baton->size += DW_BLOCK (member_loc)->size; | |
13533 | ||
13534 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
13535 | baton->data = ptr; | |
13536 | ||
13537 | *ptr++ = DW_OP_call4; | |
13538 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
13539 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
13540 | ptr += 4; | |
13541 | ||
13542 | if (attr_form_is_constant (member_loc)) | |
13543 | { | |
13544 | *ptr++ = DW_OP_addr; | |
13545 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
13546 | ptr += cu->header.addr_size; | |
13547 | } | |
13548 | else | |
13549 | { | |
13550 | /* We have to copy the data here, because DW_OP_call4 will only | |
13551 | use a DW_AT_location attribute. */ | |
13552 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
13553 | ptr += DW_BLOCK (member_loc)->size; | |
13554 | } | |
13555 | ||
13556 | *ptr++ = DW_OP_plus; | |
13557 | gdb_assert (ptr - baton->data == baton->size); | |
13558 | ||
0971de02 | 13559 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 13560 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
13561 | } |
13562 | ||
4357ac6c TT |
13563 | /* Create appropriate locally-scoped variables for all the |
13564 | DW_TAG_common_block entries. Also create a struct common_block | |
13565 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
13566 | is used to sepate the common blocks name namespace from regular | |
13567 | variable names. */ | |
c906108c SS |
13568 | |
13569 | static void | |
e7c27a73 | 13570 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13571 | { |
0971de02 TT |
13572 | struct attribute *attr; |
13573 | ||
13574 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
13575 | if (attr) | |
13576 | { | |
13577 | /* Support the .debug_loc offsets. */ | |
13578 | if (attr_form_is_block (attr)) | |
13579 | { | |
13580 | /* Ok. */ | |
13581 | } | |
13582 | else if (attr_form_is_section_offset (attr)) | |
13583 | { | |
13584 | dwarf2_complex_location_expr_complaint (); | |
13585 | attr = NULL; | |
13586 | } | |
13587 | else | |
13588 | { | |
13589 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
13590 | "common block member"); | |
13591 | attr = NULL; | |
13592 | } | |
13593 | } | |
13594 | ||
639d11d3 | 13595 | if (die->child != NULL) |
c906108c | 13596 | { |
4357ac6c TT |
13597 | struct objfile *objfile = cu->objfile; |
13598 | struct die_info *child_die; | |
13599 | size_t n_entries = 0, size; | |
13600 | struct common_block *common_block; | |
13601 | struct symbol *sym; | |
74ac6d43 | 13602 | |
4357ac6c TT |
13603 | for (child_die = die->child; |
13604 | child_die && child_die->tag; | |
13605 | child_die = sibling_die (child_die)) | |
13606 | ++n_entries; | |
13607 | ||
13608 | size = (sizeof (struct common_block) | |
13609 | + (n_entries - 1) * sizeof (struct symbol *)); | |
13610 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
13611 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
13612 | common_block->n_entries = 0; | |
13613 | ||
13614 | for (child_die = die->child; | |
13615 | child_die && child_die->tag; | |
13616 | child_die = sibling_die (child_die)) | |
13617 | { | |
13618 | /* Create the symbol in the DW_TAG_common_block block in the current | |
13619 | symbol scope. */ | |
e7c27a73 | 13620 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
13621 | if (sym != NULL) |
13622 | { | |
13623 | struct attribute *member_loc; | |
13624 | ||
13625 | common_block->contents[common_block->n_entries++] = sym; | |
13626 | ||
13627 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
13628 | cu); | |
13629 | if (member_loc) | |
13630 | { | |
13631 | /* GDB has handled this for a long time, but it is | |
13632 | not specified by DWARF. It seems to have been | |
13633 | emitted by gfortran at least as recently as: | |
13634 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
13635 | complaint (&symfile_complaints, | |
13636 | _("Variable in common block has " | |
13637 | "DW_AT_data_member_location " | |
13638 | "- DIE at 0x%x [in module %s]"), | |
4262abfb JK |
13639 | child_die->offset.sect_off, |
13640 | objfile_name (cu->objfile)); | |
0971de02 TT |
13641 | |
13642 | if (attr_form_is_section_offset (member_loc)) | |
13643 | dwarf2_complex_location_expr_complaint (); | |
13644 | else if (attr_form_is_constant (member_loc) | |
13645 | || attr_form_is_block (member_loc)) | |
13646 | { | |
13647 | if (attr) | |
13648 | mark_common_block_symbol_computed (sym, die, attr, | |
13649 | member_loc, cu); | |
13650 | } | |
13651 | else | |
13652 | dwarf2_complex_location_expr_complaint (); | |
13653 | } | |
13654 | } | |
c906108c | 13655 | } |
4357ac6c TT |
13656 | |
13657 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
13658 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
13659 | } |
13660 | } | |
13661 | ||
0114d602 | 13662 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 13663 | |
0114d602 DJ |
13664 | static struct type * |
13665 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 13666 | { |
e7c27a73 | 13667 | struct objfile *objfile = cu->objfile; |
0114d602 | 13668 | const char *previous_prefix, *name; |
9219021c | 13669 | int is_anonymous; |
0114d602 DJ |
13670 | struct type *type; |
13671 | ||
13672 | /* For extensions, reuse the type of the original namespace. */ | |
13673 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
13674 | { | |
13675 | struct die_info *ext_die; | |
13676 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 13677 | |
0114d602 DJ |
13678 | ext_die = dwarf2_extension (die, &ext_cu); |
13679 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
13680 | |
13681 | /* EXT_CU may not be the same as CU. | |
02142a6c | 13682 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
13683 | return set_die_type (die, type, cu); |
13684 | } | |
9219021c | 13685 | |
e142c38c | 13686 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
13687 | |
13688 | /* Now build the name of the current namespace. */ | |
13689 | ||
0114d602 DJ |
13690 | previous_prefix = determine_prefix (die, cu); |
13691 | if (previous_prefix[0] != '\0') | |
13692 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 13693 | previous_prefix, name, 0, cu); |
0114d602 DJ |
13694 | |
13695 | /* Create the type. */ | |
13696 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
13697 | objfile); | |
abee88f2 | 13698 | TYPE_NAME (type) = name; |
0114d602 DJ |
13699 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
13700 | ||
60531b24 | 13701 | return set_die_type (die, type, cu); |
0114d602 DJ |
13702 | } |
13703 | ||
13704 | /* Read a C++ namespace. */ | |
13705 | ||
13706 | static void | |
13707 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
13708 | { | |
13709 | struct objfile *objfile = cu->objfile; | |
0114d602 | 13710 | int is_anonymous; |
9219021c | 13711 | |
5c4e30ca DC |
13712 | /* Add a symbol associated to this if we haven't seen the namespace |
13713 | before. Also, add a using directive if it's an anonymous | |
13714 | namespace. */ | |
9219021c | 13715 | |
f2f0e013 | 13716 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
13717 | { |
13718 | struct type *type; | |
13719 | ||
0114d602 | 13720 | type = read_type_die (die, cu); |
e7c27a73 | 13721 | new_symbol (die, type, cu); |
5c4e30ca | 13722 | |
e8e80198 | 13723 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 13724 | if (is_anonymous) |
0114d602 DJ |
13725 | { |
13726 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 13727 | |
c0cc3a76 | 13728 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
12aaed36 | 13729 | NULL, NULL, 0, &objfile->objfile_obstack); |
0114d602 | 13730 | } |
5c4e30ca | 13731 | } |
9219021c | 13732 | |
639d11d3 | 13733 | if (die->child != NULL) |
d9fa45fe | 13734 | { |
639d11d3 | 13735 | struct die_info *child_die = die->child; |
6e70227d | 13736 | |
d9fa45fe DC |
13737 | while (child_die && child_die->tag) |
13738 | { | |
e7c27a73 | 13739 | process_die (child_die, cu); |
d9fa45fe DC |
13740 | child_die = sibling_die (child_die); |
13741 | } | |
13742 | } | |
38d518c9 EZ |
13743 | } |
13744 | ||
f55ee35c JK |
13745 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
13746 | imported module. Still we need that type as local Fortran "use ... only" | |
13747 | declaration imports depend on the created type in determine_prefix. */ | |
13748 | ||
13749 | static struct type * | |
13750 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
13751 | { | |
13752 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 13753 | const char *module_name; |
f55ee35c JK |
13754 | struct type *type; |
13755 | ||
13756 | module_name = dwarf2_name (die, cu); | |
13757 | if (!module_name) | |
3e43a32a MS |
13758 | complaint (&symfile_complaints, |
13759 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 13760 | die->offset.sect_off); |
f55ee35c JK |
13761 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
13762 | ||
13763 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
13764 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
13765 | ||
13766 | return set_die_type (die, type, cu); | |
13767 | } | |
13768 | ||
5d7cb8df JK |
13769 | /* Read a Fortran module. */ |
13770 | ||
13771 | static void | |
13772 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
13773 | { | |
13774 | struct die_info *child_die = die->child; | |
530e8392 KB |
13775 | struct type *type; |
13776 | ||
13777 | type = read_type_die (die, cu); | |
13778 | new_symbol (die, type, cu); | |
5d7cb8df | 13779 | |
5d7cb8df JK |
13780 | while (child_die && child_die->tag) |
13781 | { | |
13782 | process_die (child_die, cu); | |
13783 | child_die = sibling_die (child_die); | |
13784 | } | |
13785 | } | |
13786 | ||
38d518c9 EZ |
13787 | /* Return the name of the namespace represented by DIE. Set |
13788 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
13789 | namespace. */ | |
13790 | ||
13791 | static const char * | |
e142c38c | 13792 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
13793 | { |
13794 | struct die_info *current_die; | |
13795 | const char *name = NULL; | |
13796 | ||
13797 | /* Loop through the extensions until we find a name. */ | |
13798 | ||
13799 | for (current_die = die; | |
13800 | current_die != NULL; | |
f2f0e013 | 13801 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 13802 | { |
e142c38c | 13803 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
13804 | if (name != NULL) |
13805 | break; | |
13806 | } | |
13807 | ||
13808 | /* Is it an anonymous namespace? */ | |
13809 | ||
13810 | *is_anonymous = (name == NULL); | |
13811 | if (*is_anonymous) | |
2b1dbab0 | 13812 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
13813 | |
13814 | return name; | |
d9fa45fe DC |
13815 | } |
13816 | ||
c906108c SS |
13817 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
13818 | the user defined type vector. */ | |
13819 | ||
f792889a | 13820 | static struct type * |
e7c27a73 | 13821 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13822 | { |
5e2b427d | 13823 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 13824 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 13825 | struct type *type; |
8b2dbe47 KB |
13826 | struct attribute *attr_byte_size; |
13827 | struct attribute *attr_address_class; | |
13828 | int byte_size, addr_class; | |
7e314c57 JK |
13829 | struct type *target_type; |
13830 | ||
13831 | target_type = die_type (die, cu); | |
c906108c | 13832 | |
7e314c57 JK |
13833 | /* The die_type call above may have already set the type for this DIE. */ |
13834 | type = get_die_type (die, cu); | |
13835 | if (type) | |
13836 | return type; | |
13837 | ||
13838 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 13839 | |
e142c38c | 13840 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
13841 | if (attr_byte_size) |
13842 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 13843 | else |
8b2dbe47 KB |
13844 | byte_size = cu_header->addr_size; |
13845 | ||
e142c38c | 13846 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
13847 | if (attr_address_class) |
13848 | addr_class = DW_UNSND (attr_address_class); | |
13849 | else | |
13850 | addr_class = DW_ADDR_none; | |
13851 | ||
13852 | /* If the pointer size or address class is different than the | |
13853 | default, create a type variant marked as such and set the | |
13854 | length accordingly. */ | |
13855 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 13856 | { |
5e2b427d | 13857 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
13858 | { |
13859 | int type_flags; | |
13860 | ||
849957d9 | 13861 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 13862 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
13863 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
13864 | == 0); | |
8b2dbe47 KB |
13865 | type = make_type_with_address_space (type, type_flags); |
13866 | } | |
13867 | else if (TYPE_LENGTH (type) != byte_size) | |
13868 | { | |
3e43a32a MS |
13869 | complaint (&symfile_complaints, |
13870 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 13871 | } |
6e70227d | 13872 | else |
9a619af0 MS |
13873 | { |
13874 | /* Should we also complain about unhandled address classes? */ | |
13875 | } | |
c906108c | 13876 | } |
8b2dbe47 KB |
13877 | |
13878 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 13879 | return set_die_type (die, type, cu); |
c906108c SS |
13880 | } |
13881 | ||
13882 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
13883 | the user defined type vector. */ | |
13884 | ||
f792889a | 13885 | static struct type * |
e7c27a73 | 13886 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
13887 | { |
13888 | struct type *type; | |
13889 | struct type *to_type; | |
13890 | struct type *domain; | |
13891 | ||
e7c27a73 DJ |
13892 | to_type = die_type (die, cu); |
13893 | domain = die_containing_type (die, cu); | |
0d5de010 | 13894 | |
7e314c57 JK |
13895 | /* The calls above may have already set the type for this DIE. */ |
13896 | type = get_die_type (die, cu); | |
13897 | if (type) | |
13898 | return type; | |
13899 | ||
0d5de010 DJ |
13900 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
13901 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
13902 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
13903 | { | |
13904 | struct type *new_type = alloc_type (cu->objfile); | |
13905 | ||
13906 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
13907 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
13908 | TYPE_VARARGS (to_type)); | |
13909 | type = lookup_methodptr_type (new_type); | |
13910 | } | |
0d5de010 DJ |
13911 | else |
13912 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 13913 | |
f792889a | 13914 | return set_die_type (die, type, cu); |
c906108c SS |
13915 | } |
13916 | ||
13917 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
13918 | the user defined type vector. */ | |
13919 | ||
f792889a | 13920 | static struct type * |
e7c27a73 | 13921 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13922 | { |
e7c27a73 | 13923 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 13924 | struct type *type, *target_type; |
c906108c SS |
13925 | struct attribute *attr; |
13926 | ||
7e314c57 JK |
13927 | target_type = die_type (die, cu); |
13928 | ||
13929 | /* The die_type call above may have already set the type for this DIE. */ | |
13930 | type = get_die_type (die, cu); | |
13931 | if (type) | |
13932 | return type; | |
13933 | ||
13934 | type = lookup_reference_type (target_type); | |
e142c38c | 13935 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13936 | if (attr) |
13937 | { | |
13938 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13939 | } | |
13940 | else | |
13941 | { | |
107d2387 | 13942 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 13943 | } |
f792889a | 13944 | return set_die_type (die, type, cu); |
c906108c SS |
13945 | } |
13946 | ||
f792889a | 13947 | static struct type * |
e7c27a73 | 13948 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13949 | { |
f792889a | 13950 | struct type *base_type, *cv_type; |
c906108c | 13951 | |
e7c27a73 | 13952 | base_type = die_type (die, cu); |
7e314c57 JK |
13953 | |
13954 | /* The die_type call above may have already set the type for this DIE. */ | |
13955 | cv_type = get_die_type (die, cu); | |
13956 | if (cv_type) | |
13957 | return cv_type; | |
13958 | ||
2f608a3a KW |
13959 | /* In case the const qualifier is applied to an array type, the element type |
13960 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
13961 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
13962 | { | |
13963 | struct type *el_type, *inner_array; | |
13964 | ||
13965 | base_type = copy_type (base_type); | |
13966 | inner_array = base_type; | |
13967 | ||
13968 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
13969 | { | |
13970 | TYPE_TARGET_TYPE (inner_array) = | |
13971 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
13972 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
13973 | } | |
13974 | ||
13975 | el_type = TYPE_TARGET_TYPE (inner_array); | |
13976 | TYPE_TARGET_TYPE (inner_array) = | |
13977 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
13978 | ||
13979 | return set_die_type (die, base_type, cu); | |
13980 | } | |
13981 | ||
f792889a DJ |
13982 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
13983 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
13984 | } |
13985 | ||
f792889a | 13986 | static struct type * |
e7c27a73 | 13987 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13988 | { |
f792889a | 13989 | struct type *base_type, *cv_type; |
c906108c | 13990 | |
e7c27a73 | 13991 | base_type = die_type (die, cu); |
7e314c57 JK |
13992 | |
13993 | /* The die_type call above may have already set the type for this DIE. */ | |
13994 | cv_type = get_die_type (die, cu); | |
13995 | if (cv_type) | |
13996 | return cv_type; | |
13997 | ||
f792889a DJ |
13998 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
13999 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14000 | } |
14001 | ||
06d66ee9 TT |
14002 | /* Handle DW_TAG_restrict_type. */ |
14003 | ||
14004 | static struct type * | |
14005 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14006 | { | |
14007 | struct type *base_type, *cv_type; | |
14008 | ||
14009 | base_type = die_type (die, cu); | |
14010 | ||
14011 | /* The die_type call above may have already set the type for this DIE. */ | |
14012 | cv_type = get_die_type (die, cu); | |
14013 | if (cv_type) | |
14014 | return cv_type; | |
14015 | ||
14016 | cv_type = make_restrict_type (base_type); | |
14017 | return set_die_type (die, cv_type, cu); | |
14018 | } | |
14019 | ||
c906108c SS |
14020 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14021 | the user defined type vector. It isn't really a user defined type, | |
14022 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14023 | attribute to reference it. */ | |
14024 | ||
f792889a | 14025 | static struct type * |
e7c27a73 | 14026 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14027 | { |
e7c27a73 | 14028 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14029 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14030 | struct type *type, *range_type, *index_type, *char_type; |
14031 | struct attribute *attr; | |
14032 | unsigned int length; | |
14033 | ||
e142c38c | 14034 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14035 | if (attr) |
14036 | { | |
14037 | length = DW_UNSND (attr); | |
14038 | } | |
14039 | else | |
14040 | { | |
0963b4bd | 14041 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14042 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14043 | if (attr) |
14044 | { | |
14045 | length = DW_UNSND (attr); | |
14046 | } | |
14047 | else | |
14048 | { | |
14049 | length = 1; | |
14050 | } | |
c906108c | 14051 | } |
6ccb9162 | 14052 | |
46bf5051 | 14053 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14054 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14055 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14056 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14057 | |
f792889a | 14058 | return set_die_type (die, type, cu); |
c906108c SS |
14059 | } |
14060 | ||
4d804846 JB |
14061 | /* Assuming that DIE corresponds to a function, returns nonzero |
14062 | if the function is prototyped. */ | |
14063 | ||
14064 | static int | |
14065 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14066 | { | |
14067 | struct attribute *attr; | |
14068 | ||
14069 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
14070 | if (attr && (DW_UNSND (attr) != 0)) | |
14071 | return 1; | |
14072 | ||
14073 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
14074 | is only meaninful for C, but the concept also extends to other | |
14075 | languages that allow unprototyped functions (Eg: Objective C). | |
14076 | For all other languages, assume that functions are always | |
14077 | prototyped. */ | |
14078 | if (cu->language != language_c | |
14079 | && cu->language != language_objc | |
14080 | && cu->language != language_opencl) | |
14081 | return 1; | |
14082 | ||
14083 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
14084 | prototyped and unprototyped functions; default to prototyped, | |
14085 | since that is more common in modern code (and RealView warns | |
14086 | about unprototyped functions). */ | |
14087 | if (producer_is_realview (cu->producer)) | |
14088 | return 1; | |
14089 | ||
14090 | return 0; | |
14091 | } | |
14092 | ||
c906108c SS |
14093 | /* Handle DIES due to C code like: |
14094 | ||
14095 | struct foo | |
c5aa993b JM |
14096 | { |
14097 | int (*funcp)(int a, long l); | |
14098 | int b; | |
14099 | }; | |
c906108c | 14100 | |
0963b4bd | 14101 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 14102 | |
f792889a | 14103 | static struct type * |
e7c27a73 | 14104 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14105 | { |
bb5ed363 | 14106 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
14107 | struct type *type; /* Type that this function returns. */ |
14108 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
14109 | struct attribute *attr; |
14110 | ||
e7c27a73 | 14111 | type = die_type (die, cu); |
7e314c57 JK |
14112 | |
14113 | /* The die_type call above may have already set the type for this DIE. */ | |
14114 | ftype = get_die_type (die, cu); | |
14115 | if (ftype) | |
14116 | return ftype; | |
14117 | ||
0c8b41f1 | 14118 | ftype = lookup_function_type (type); |
c906108c | 14119 | |
4d804846 | 14120 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 14121 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 14122 | |
c055b101 CV |
14123 | /* Store the calling convention in the type if it's available in |
14124 | the subroutine die. Otherwise set the calling convention to | |
14125 | the default value DW_CC_normal. */ | |
14126 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
14127 | if (attr) |
14128 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
14129 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
14130 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
14131 | else | |
14132 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
14133 | |
14134 | /* We need to add the subroutine type to the die immediately so | |
14135 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 14136 | declared as the same subroutine type. */ |
76c10ea2 | 14137 | set_die_type (die, ftype, cu); |
6e70227d | 14138 | |
639d11d3 | 14139 | if (die->child != NULL) |
c906108c | 14140 | { |
bb5ed363 | 14141 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 14142 | struct die_info *child_die; |
8072405b | 14143 | int nparams, iparams; |
c906108c SS |
14144 | |
14145 | /* Count the number of parameters. | |
14146 | FIXME: GDB currently ignores vararg functions, but knows about | |
14147 | vararg member functions. */ | |
8072405b | 14148 | nparams = 0; |
639d11d3 | 14149 | child_die = die->child; |
c906108c SS |
14150 | while (child_die && child_die->tag) |
14151 | { | |
14152 | if (child_die->tag == DW_TAG_formal_parameter) | |
14153 | nparams++; | |
14154 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 14155 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
14156 | child_die = sibling_die (child_die); |
14157 | } | |
14158 | ||
14159 | /* Allocate storage for parameters and fill them in. */ | |
14160 | TYPE_NFIELDS (ftype) = nparams; | |
14161 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 14162 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 14163 | |
8072405b JK |
14164 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
14165 | even if we error out during the parameters reading below. */ | |
14166 | for (iparams = 0; iparams < nparams; iparams++) | |
14167 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
14168 | ||
14169 | iparams = 0; | |
639d11d3 | 14170 | child_die = die->child; |
c906108c SS |
14171 | while (child_die && child_die->tag) |
14172 | { | |
14173 | if (child_die->tag == DW_TAG_formal_parameter) | |
14174 | { | |
3ce3b1ba PA |
14175 | struct type *arg_type; |
14176 | ||
14177 | /* DWARF version 2 has no clean way to discern C++ | |
14178 | static and non-static member functions. G++ helps | |
14179 | GDB by marking the first parameter for non-static | |
14180 | member functions (which is the this pointer) as | |
14181 | artificial. We pass this information to | |
14182 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
14183 | ||
14184 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
14185 | 4.5 does not yet generate. */ | |
e142c38c | 14186 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
14187 | if (attr) |
14188 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
14189 | else | |
418835cc KS |
14190 | { |
14191 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
14192 | ||
14193 | /* GCC/43521: In java, the formal parameter | |
14194 | "this" is sometimes not marked with DW_AT_artificial. */ | |
14195 | if (cu->language == language_java) | |
14196 | { | |
14197 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 14198 | |
418835cc KS |
14199 | if (name && !strcmp (name, "this")) |
14200 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
14201 | } | |
14202 | } | |
3ce3b1ba PA |
14203 | arg_type = die_type (child_die, cu); |
14204 | ||
14205 | /* RealView does not mark THIS as const, which the testsuite | |
14206 | expects. GCC marks THIS as const in method definitions, | |
14207 | but not in the class specifications (GCC PR 43053). */ | |
14208 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
14209 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
14210 | { | |
14211 | int is_this = 0; | |
14212 | struct dwarf2_cu *arg_cu = cu; | |
14213 | const char *name = dwarf2_name (child_die, cu); | |
14214 | ||
14215 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
14216 | if (attr) | |
14217 | { | |
14218 | /* If the compiler emits this, use it. */ | |
14219 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
14220 | is_this = 1; | |
14221 | } | |
14222 | else if (name && strcmp (name, "this") == 0) | |
14223 | /* Function definitions will have the argument names. */ | |
14224 | is_this = 1; | |
14225 | else if (name == NULL && iparams == 0) | |
14226 | /* Declarations may not have the names, so like | |
14227 | elsewhere in GDB, assume an artificial first | |
14228 | argument is "this". */ | |
14229 | is_this = 1; | |
14230 | ||
14231 | if (is_this) | |
14232 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
14233 | arg_type, 0); | |
14234 | } | |
14235 | ||
14236 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
14237 | iparams++; |
14238 | } | |
14239 | child_die = sibling_die (child_die); | |
14240 | } | |
14241 | } | |
14242 | ||
76c10ea2 | 14243 | return ftype; |
c906108c SS |
14244 | } |
14245 | ||
f792889a | 14246 | static struct type * |
e7c27a73 | 14247 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14248 | { |
e7c27a73 | 14249 | struct objfile *objfile = cu->objfile; |
0114d602 | 14250 | const char *name = NULL; |
3c8e0968 | 14251 | struct type *this_type, *target_type; |
c906108c | 14252 | |
94af9270 | 14253 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 14254 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 14255 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 14256 | TYPE_NAME (this_type) = name; |
f792889a | 14257 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
14258 | target_type = die_type (die, cu); |
14259 | if (target_type != this_type) | |
14260 | TYPE_TARGET_TYPE (this_type) = target_type; | |
14261 | else | |
14262 | { | |
14263 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
14264 | spec and cause infinite loops in GDB. */ | |
14265 | complaint (&symfile_complaints, | |
14266 | _("Self-referential DW_TAG_typedef " | |
14267 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14268 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
14269 | TYPE_TARGET_TYPE (this_type) = NULL; |
14270 | } | |
f792889a | 14271 | return this_type; |
c906108c SS |
14272 | } |
14273 | ||
14274 | /* Find a representation of a given base type and install | |
14275 | it in the TYPE field of the die. */ | |
14276 | ||
f792889a | 14277 | static struct type * |
e7c27a73 | 14278 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14279 | { |
e7c27a73 | 14280 | struct objfile *objfile = cu->objfile; |
c906108c SS |
14281 | struct type *type; |
14282 | struct attribute *attr; | |
14283 | int encoding = 0, size = 0; | |
15d034d0 | 14284 | const char *name; |
6ccb9162 UW |
14285 | enum type_code code = TYPE_CODE_INT; |
14286 | int type_flags = 0; | |
14287 | struct type *target_type = NULL; | |
c906108c | 14288 | |
e142c38c | 14289 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
14290 | if (attr) |
14291 | { | |
14292 | encoding = DW_UNSND (attr); | |
14293 | } | |
e142c38c | 14294 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14295 | if (attr) |
14296 | { | |
14297 | size = DW_UNSND (attr); | |
14298 | } | |
39cbfefa | 14299 | name = dwarf2_name (die, cu); |
6ccb9162 | 14300 | if (!name) |
c906108c | 14301 | { |
6ccb9162 UW |
14302 | complaint (&symfile_complaints, |
14303 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 14304 | } |
6ccb9162 UW |
14305 | |
14306 | switch (encoding) | |
c906108c | 14307 | { |
6ccb9162 UW |
14308 | case DW_ATE_address: |
14309 | /* Turn DW_ATE_address into a void * pointer. */ | |
14310 | code = TYPE_CODE_PTR; | |
14311 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14312 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
14313 | break; | |
14314 | case DW_ATE_boolean: | |
14315 | code = TYPE_CODE_BOOL; | |
14316 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14317 | break; | |
14318 | case DW_ATE_complex_float: | |
14319 | code = TYPE_CODE_COMPLEX; | |
14320 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
14321 | break; | |
14322 | case DW_ATE_decimal_float: | |
14323 | code = TYPE_CODE_DECFLOAT; | |
14324 | break; | |
14325 | case DW_ATE_float: | |
14326 | code = TYPE_CODE_FLT; | |
14327 | break; | |
14328 | case DW_ATE_signed: | |
14329 | break; | |
14330 | case DW_ATE_unsigned: | |
14331 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
14332 | if (cu->language == language_fortran |
14333 | && name | |
14334 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
14335 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
14336 | break; |
14337 | case DW_ATE_signed_char: | |
6e70227d | 14338 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14339 | || cu->language == language_pascal |
14340 | || cu->language == language_fortran) | |
6ccb9162 UW |
14341 | code = TYPE_CODE_CHAR; |
14342 | break; | |
14343 | case DW_ATE_unsigned_char: | |
868a0084 | 14344 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
14345 | || cu->language == language_pascal |
14346 | || cu->language == language_fortran) | |
6ccb9162 UW |
14347 | code = TYPE_CODE_CHAR; |
14348 | type_flags |= TYPE_FLAG_UNSIGNED; | |
14349 | break; | |
75079b2b TT |
14350 | case DW_ATE_UTF: |
14351 | /* We just treat this as an integer and then recognize the | |
14352 | type by name elsewhere. */ | |
14353 | break; | |
14354 | ||
6ccb9162 UW |
14355 | default: |
14356 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
14357 | dwarf_type_encoding_name (encoding)); | |
14358 | break; | |
c906108c | 14359 | } |
6ccb9162 | 14360 | |
0114d602 DJ |
14361 | type = init_type (code, size, type_flags, NULL, objfile); |
14362 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
14363 | TYPE_TARGET_TYPE (type) = target_type; |
14364 | ||
0114d602 | 14365 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 14366 | TYPE_NOSIGN (type) = 1; |
0114d602 | 14367 | |
f792889a | 14368 | return set_die_type (die, type, cu); |
c906108c SS |
14369 | } |
14370 | ||
80180f79 SA |
14371 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
14372 | resulting value of the attribute into struct bound_prop. | |
14373 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
14374 | ||
14375 | static int | |
14376 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
14377 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
14378 | { | |
14379 | struct dwarf2_property_baton *baton; | |
14380 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
14381 | ||
14382 | if (attr == NULL || prop == NULL) | |
14383 | return 0; | |
14384 | ||
14385 | if (attr_form_is_block (attr)) | |
14386 | { | |
14387 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14388 | baton->referenced_type = NULL; | |
14389 | baton->locexpr.per_cu = cu->per_cu; | |
14390 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
14391 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
14392 | prop->data.baton = baton; | |
14393 | prop->kind = PROP_LOCEXPR; | |
14394 | gdb_assert (prop->data.baton != NULL); | |
14395 | } | |
14396 | else if (attr_form_is_ref (attr)) | |
14397 | { | |
14398 | struct dwarf2_cu *target_cu = cu; | |
14399 | struct die_info *target_die; | |
14400 | struct attribute *target_attr; | |
14401 | ||
14402 | target_die = follow_die_ref (die, attr, &target_cu); | |
14403 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
14404 | if (target_attr == NULL) | |
14405 | return 0; | |
14406 | ||
14407 | if (attr_form_is_section_offset (target_attr)) | |
14408 | { | |
14409 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14410 | baton->referenced_type = die_type (target_die, target_cu); | |
14411 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
14412 | prop->data.baton = baton; | |
14413 | prop->kind = PROP_LOCLIST; | |
14414 | gdb_assert (prop->data.baton != NULL); | |
14415 | } | |
14416 | else if (attr_form_is_block (target_attr)) | |
14417 | { | |
14418 | baton = obstack_alloc (obstack, sizeof (*baton)); | |
14419 | baton->referenced_type = die_type (target_die, target_cu); | |
14420 | baton->locexpr.per_cu = cu->per_cu; | |
14421 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
14422 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
14423 | prop->data.baton = baton; | |
14424 | prop->kind = PROP_LOCEXPR; | |
14425 | gdb_assert (prop->data.baton != NULL); | |
14426 | } | |
14427 | else | |
14428 | { | |
14429 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14430 | "dynamic property"); | |
14431 | return 0; | |
14432 | } | |
14433 | } | |
14434 | else if (attr_form_is_constant (attr)) | |
14435 | { | |
14436 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
14437 | prop->kind = PROP_CONST; | |
14438 | } | |
14439 | else | |
14440 | { | |
14441 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
14442 | dwarf2_name (die, cu)); | |
14443 | return 0; | |
14444 | } | |
14445 | ||
14446 | return 1; | |
14447 | } | |
14448 | ||
a02abb62 JB |
14449 | /* Read the given DW_AT_subrange DIE. */ |
14450 | ||
f792889a | 14451 | static struct type * |
a02abb62 JB |
14452 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
14453 | { | |
4c9ad8c2 | 14454 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
14455 | struct type *range_type; |
14456 | struct attribute *attr; | |
729efb13 | 14457 | struct dynamic_prop low, high; |
4fae6e18 | 14458 | int low_default_is_valid; |
c451ebe5 | 14459 | int high_bound_is_count = 0; |
15d034d0 | 14460 | const char *name; |
43bbcdc2 | 14461 | LONGEST negative_mask; |
e77813c8 | 14462 | |
4c9ad8c2 TT |
14463 | orig_base_type = die_type (die, cu); |
14464 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
14465 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
14466 | creating the range type, but we use the result of check_typedef | |
14467 | when examining properties of the type. */ | |
14468 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 14469 | |
7e314c57 JK |
14470 | /* The die_type call above may have already set the type for this DIE. */ |
14471 | range_type = get_die_type (die, cu); | |
14472 | if (range_type) | |
14473 | return range_type; | |
14474 | ||
729efb13 SA |
14475 | low.kind = PROP_CONST; |
14476 | high.kind = PROP_CONST; | |
14477 | high.data.const_val = 0; | |
14478 | ||
4fae6e18 JK |
14479 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
14480 | omitting DW_AT_lower_bound. */ | |
14481 | switch (cu->language) | |
6e70227d | 14482 | { |
4fae6e18 JK |
14483 | case language_c: |
14484 | case language_cplus: | |
729efb13 | 14485 | low.data.const_val = 0; |
4fae6e18 JK |
14486 | low_default_is_valid = 1; |
14487 | break; | |
14488 | case language_fortran: | |
729efb13 | 14489 | low.data.const_val = 1; |
4fae6e18 JK |
14490 | low_default_is_valid = 1; |
14491 | break; | |
14492 | case language_d: | |
14493 | case language_java: | |
14494 | case language_objc: | |
729efb13 | 14495 | low.data.const_val = 0; |
4fae6e18 JK |
14496 | low_default_is_valid = (cu->header.version >= 4); |
14497 | break; | |
14498 | case language_ada: | |
14499 | case language_m2: | |
14500 | case language_pascal: | |
729efb13 | 14501 | low.data.const_val = 1; |
4fae6e18 JK |
14502 | low_default_is_valid = (cu->header.version >= 4); |
14503 | break; | |
14504 | default: | |
729efb13 | 14505 | low.data.const_val = 0; |
4fae6e18 JK |
14506 | low_default_is_valid = 0; |
14507 | break; | |
a02abb62 JB |
14508 | } |
14509 | ||
e142c38c | 14510 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 14511 | if (attr) |
11c1ba78 | 14512 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
14513 | else if (!low_default_is_valid) |
14514 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
14515 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14516 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 14517 | |
e142c38c | 14518 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 14519 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
14520 | { |
14521 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 14522 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 14523 | { |
c451ebe5 SA |
14524 | /* If bounds are constant do the final calculation here. */ |
14525 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
14526 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
14527 | else | |
14528 | high_bound_is_count = 1; | |
c2ff108b | 14529 | } |
e77813c8 PM |
14530 | } |
14531 | ||
14532 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
14533 | without specifying a base type. | |
14534 | In that case, the base type must be set to the type of | |
14535 | the lower bound, upper bound or count, in that order, if any of these | |
14536 | three attributes references an object that has a type. | |
14537 | If no base type is found, the Dwarf-2 specifications say that | |
14538 | a signed integer type of size equal to the size of an address should | |
14539 | be used. | |
14540 | For the following C code: `extern char gdb_int [];' | |
14541 | GCC produces an empty range DIE. | |
14542 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 14543 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
14544 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
14545 | { | |
14546 | struct objfile *objfile = cu->objfile; | |
14547 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
14548 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
14549 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
14550 | ||
14551 | /* Test "int", "long int", and "long long int" objfile types, | |
14552 | and select the first one having a size above or equal to the | |
14553 | architecture address size. */ | |
14554 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14555 | base_type = int_type; | |
14556 | else | |
14557 | { | |
14558 | int_type = objfile_type (objfile)->builtin_long; | |
14559 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14560 | base_type = int_type; | |
14561 | else | |
14562 | { | |
14563 | int_type = objfile_type (objfile)->builtin_long_long; | |
14564 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
14565 | base_type = int_type; | |
14566 | } | |
14567 | } | |
14568 | } | |
a02abb62 | 14569 | |
dbb9c2b1 JB |
14570 | /* Normally, the DWARF producers are expected to use a signed |
14571 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
14572 | But this is unfortunately not always the case, as witnessed | |
14573 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
14574 | is used instead. To work around that ambiguity, we treat | |
14575 | the bounds as signed, and thus sign-extend their values, when | |
14576 | the base type is signed. */ | |
6e70227d | 14577 | negative_mask = |
43bbcdc2 | 14578 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
729efb13 SA |
14579 | if (low.kind == PROP_CONST |
14580 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
14581 | low.data.const_val |= negative_mask; | |
14582 | if (high.kind == PROP_CONST | |
14583 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
14584 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 14585 | |
729efb13 | 14586 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 14587 | |
c451ebe5 SA |
14588 | if (high_bound_is_count) |
14589 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
14590 | ||
c2ff108b JK |
14591 | /* Ada expects an empty array on no boundary attributes. */ |
14592 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 14593 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 14594 | |
39cbfefa DJ |
14595 | name = dwarf2_name (die, cu); |
14596 | if (name) | |
14597 | TYPE_NAME (range_type) = name; | |
6e70227d | 14598 | |
e142c38c | 14599 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
14600 | if (attr) |
14601 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
14602 | ||
7e314c57 JK |
14603 | set_die_type (die, range_type, cu); |
14604 | ||
14605 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14606 | set_descriptive_type (range_type, die, cu); |
14607 | ||
7e314c57 | 14608 | return range_type; |
a02abb62 | 14609 | } |
6e70227d | 14610 | |
f792889a | 14611 | static struct type * |
81a17f79 JB |
14612 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
14613 | { | |
14614 | struct type *type; | |
81a17f79 | 14615 | |
81a17f79 JB |
14616 | /* For now, we only support the C meaning of an unspecified type: void. */ |
14617 | ||
0114d602 DJ |
14618 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
14619 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 14620 | |
f792889a | 14621 | return set_die_type (die, type, cu); |
81a17f79 | 14622 | } |
a02abb62 | 14623 | |
639d11d3 DC |
14624 | /* Read a single die and all its descendents. Set the die's sibling |
14625 | field to NULL; set other fields in the die correctly, and set all | |
14626 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
14627 | location of the info_ptr after reading all of those dies. PARENT | |
14628 | is the parent of the die in question. */ | |
14629 | ||
14630 | static struct die_info * | |
dee91e82 | 14631 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
14632 | const gdb_byte *info_ptr, |
14633 | const gdb_byte **new_info_ptr, | |
dee91e82 | 14634 | struct die_info *parent) |
639d11d3 DC |
14635 | { |
14636 | struct die_info *die; | |
d521ce57 | 14637 | const gdb_byte *cur_ptr; |
639d11d3 DC |
14638 | int has_children; |
14639 | ||
bf6af496 | 14640 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
14641 | if (die == NULL) |
14642 | { | |
14643 | *new_info_ptr = cur_ptr; | |
14644 | return NULL; | |
14645 | } | |
93311388 | 14646 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
14647 | |
14648 | if (has_children) | |
bf6af496 | 14649 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
14650 | else |
14651 | { | |
14652 | die->child = NULL; | |
14653 | *new_info_ptr = cur_ptr; | |
14654 | } | |
14655 | ||
14656 | die->sibling = NULL; | |
14657 | die->parent = parent; | |
14658 | return die; | |
14659 | } | |
14660 | ||
14661 | /* Read a die, all of its descendents, and all of its siblings; set | |
14662 | all of the fields of all of the dies correctly. Arguments are as | |
14663 | in read_die_and_children. */ | |
14664 | ||
14665 | static struct die_info * | |
bf6af496 | 14666 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
14667 | const gdb_byte *info_ptr, |
14668 | const gdb_byte **new_info_ptr, | |
bf6af496 | 14669 | struct die_info *parent) |
639d11d3 DC |
14670 | { |
14671 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 14672 | const gdb_byte *cur_ptr; |
639d11d3 | 14673 | |
c906108c | 14674 | cur_ptr = info_ptr; |
639d11d3 DC |
14675 | first_die = last_sibling = NULL; |
14676 | ||
14677 | while (1) | |
c906108c | 14678 | { |
639d11d3 | 14679 | struct die_info *die |
dee91e82 | 14680 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 14681 | |
1d325ec1 | 14682 | if (die == NULL) |
c906108c | 14683 | { |
639d11d3 DC |
14684 | *new_info_ptr = cur_ptr; |
14685 | return first_die; | |
c906108c | 14686 | } |
1d325ec1 DJ |
14687 | |
14688 | if (!first_die) | |
14689 | first_die = die; | |
c906108c | 14690 | else |
1d325ec1 DJ |
14691 | last_sibling->sibling = die; |
14692 | ||
14693 | last_sibling = die; | |
c906108c | 14694 | } |
c906108c SS |
14695 | } |
14696 | ||
bf6af496 DE |
14697 | /* Read a die, all of its descendents, and all of its siblings; set |
14698 | all of the fields of all of the dies correctly. Arguments are as | |
14699 | in read_die_and_children. | |
14700 | This the main entry point for reading a DIE and all its children. */ | |
14701 | ||
14702 | static struct die_info * | |
14703 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
14704 | const gdb_byte *info_ptr, |
14705 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
14706 | struct die_info *parent) |
14707 | { | |
14708 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
14709 | new_info_ptr, parent); | |
14710 | ||
14711 | if (dwarf2_die_debug) | |
14712 | { | |
14713 | fprintf_unfiltered (gdb_stdlog, | |
14714 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 14715 | get_section_name (reader->die_section), |
bf6af496 DE |
14716 | (unsigned) (info_ptr - reader->die_section->buffer), |
14717 | bfd_get_filename (reader->abfd)); | |
14718 | dump_die (die, dwarf2_die_debug); | |
14719 | } | |
14720 | ||
14721 | return die; | |
14722 | } | |
14723 | ||
3019eac3 DE |
14724 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
14725 | attributes. | |
14726 | The caller is responsible for filling in the extra attributes | |
14727 | and updating (*DIEP)->num_attrs. | |
14728 | Set DIEP to point to a newly allocated die with its information, | |
14729 | except for its child, sibling, and parent fields. | |
14730 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 14731 | |
d521ce57 | 14732 | static const gdb_byte * |
3019eac3 | 14733 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 14734 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 14735 | int *has_children, int num_extra_attrs) |
93311388 | 14736 | { |
b64f50a1 JK |
14737 | unsigned int abbrev_number, bytes_read, i; |
14738 | sect_offset offset; | |
93311388 DE |
14739 | struct abbrev_info *abbrev; |
14740 | struct die_info *die; | |
14741 | struct dwarf2_cu *cu = reader->cu; | |
14742 | bfd *abfd = reader->abfd; | |
14743 | ||
b64f50a1 | 14744 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
14745 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14746 | info_ptr += bytes_read; | |
14747 | if (!abbrev_number) | |
14748 | { | |
14749 | *diep = NULL; | |
14750 | *has_children = 0; | |
14751 | return info_ptr; | |
14752 | } | |
14753 | ||
433df2d4 | 14754 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 14755 | if (!abbrev) |
348e048f DE |
14756 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
14757 | abbrev_number, | |
14758 | bfd_get_filename (abfd)); | |
14759 | ||
3019eac3 | 14760 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
14761 | die->offset = offset; |
14762 | die->tag = abbrev->tag; | |
14763 | die->abbrev = abbrev_number; | |
14764 | ||
3019eac3 DE |
14765 | /* Make the result usable. |
14766 | The caller needs to update num_attrs after adding the extra | |
14767 | attributes. */ | |
93311388 DE |
14768 | die->num_attrs = abbrev->num_attrs; |
14769 | ||
14770 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
14771 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
14772 | info_ptr); | |
93311388 DE |
14773 | |
14774 | *diep = die; | |
14775 | *has_children = abbrev->has_children; | |
14776 | return info_ptr; | |
14777 | } | |
14778 | ||
3019eac3 DE |
14779 | /* Read a die and all its attributes. |
14780 | Set DIEP to point to a newly allocated die with its information, | |
14781 | except for its child, sibling, and parent fields. | |
14782 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
14783 | ||
d521ce57 | 14784 | static const gdb_byte * |
3019eac3 | 14785 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 14786 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
14787 | int *has_children) |
14788 | { | |
d521ce57 | 14789 | const gdb_byte *result; |
bf6af496 DE |
14790 | |
14791 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
14792 | ||
14793 | if (dwarf2_die_debug) | |
14794 | { | |
14795 | fprintf_unfiltered (gdb_stdlog, | |
14796 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 14797 | get_section_name (reader->die_section), |
bf6af496 DE |
14798 | (unsigned) (info_ptr - reader->die_section->buffer), |
14799 | bfd_get_filename (reader->abfd)); | |
14800 | dump_die (*diep, dwarf2_die_debug); | |
14801 | } | |
14802 | ||
14803 | return result; | |
3019eac3 | 14804 | } |
433df2d4 DE |
14805 | \f |
14806 | /* Abbreviation tables. | |
3019eac3 | 14807 | |
433df2d4 | 14808 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
14809 | stored in a separate .debug_abbrev section. Before we read any |
14810 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
14811 | in a hash table. */ |
14812 | ||
14813 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
14814 | ||
14815 | static struct abbrev_info * | |
14816 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
14817 | { | |
14818 | struct abbrev_info *abbrev; | |
14819 | ||
14820 | abbrev = (struct abbrev_info *) | |
14821 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
14822 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
14823 | return abbrev; | |
14824 | } | |
14825 | ||
14826 | /* Add an abbreviation to the table. */ | |
c906108c SS |
14827 | |
14828 | static void | |
433df2d4 DE |
14829 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
14830 | unsigned int abbrev_number, | |
14831 | struct abbrev_info *abbrev) | |
14832 | { | |
14833 | unsigned int hash_number; | |
14834 | ||
14835 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
14836 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
14837 | abbrev_table->abbrevs[hash_number] = abbrev; | |
14838 | } | |
dee91e82 | 14839 | |
433df2d4 DE |
14840 | /* Look up an abbrev in the table. |
14841 | Returns NULL if the abbrev is not found. */ | |
14842 | ||
14843 | static struct abbrev_info * | |
14844 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
14845 | unsigned int abbrev_number) | |
c906108c | 14846 | { |
433df2d4 DE |
14847 | unsigned int hash_number; |
14848 | struct abbrev_info *abbrev; | |
14849 | ||
14850 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
14851 | abbrev = abbrev_table->abbrevs[hash_number]; | |
14852 | ||
14853 | while (abbrev) | |
14854 | { | |
14855 | if (abbrev->number == abbrev_number) | |
14856 | return abbrev; | |
14857 | abbrev = abbrev->next; | |
14858 | } | |
14859 | return NULL; | |
14860 | } | |
14861 | ||
14862 | /* Read in an abbrev table. */ | |
14863 | ||
14864 | static struct abbrev_table * | |
14865 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
14866 | sect_offset offset) | |
14867 | { | |
14868 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 14869 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 14870 | struct abbrev_table *abbrev_table; |
d521ce57 | 14871 | const gdb_byte *abbrev_ptr; |
c906108c SS |
14872 | struct abbrev_info *cur_abbrev; |
14873 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 14874 | unsigned int abbrev_form; |
f3dd6933 DJ |
14875 | struct attr_abbrev *cur_attrs; |
14876 | unsigned int allocated_attrs; | |
c906108c | 14877 | |
70ba0933 | 14878 | abbrev_table = XNEW (struct abbrev_table); |
f4dc4d17 | 14879 | abbrev_table->offset = offset; |
433df2d4 DE |
14880 | obstack_init (&abbrev_table->abbrev_obstack); |
14881 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
14882 | (ABBREV_HASH_SIZE | |
14883 | * sizeof (struct abbrev_info *))); | |
14884 | memset (abbrev_table->abbrevs, 0, | |
14885 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 14886 | |
433df2d4 DE |
14887 | dwarf2_read_section (objfile, section); |
14888 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
14889 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
14890 | abbrev_ptr += bytes_read; | |
14891 | ||
f3dd6933 DJ |
14892 | allocated_attrs = ATTR_ALLOC_CHUNK; |
14893 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 14894 | |
0963b4bd | 14895 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
14896 | while (abbrev_number) |
14897 | { | |
433df2d4 | 14898 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
14899 | |
14900 | /* read in abbrev header */ | |
14901 | cur_abbrev->number = abbrev_number; | |
14902 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14903 | abbrev_ptr += bytes_read; | |
14904 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
14905 | abbrev_ptr += 1; | |
14906 | ||
14907 | /* now read in declarations */ | |
14908 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14909 | abbrev_ptr += bytes_read; | |
14910 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14911 | abbrev_ptr += bytes_read; | |
14912 | while (abbrev_name) | |
14913 | { | |
f3dd6933 | 14914 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 14915 | { |
f3dd6933 DJ |
14916 | allocated_attrs += ATTR_ALLOC_CHUNK; |
14917 | cur_attrs | |
14918 | = xrealloc (cur_attrs, (allocated_attrs | |
14919 | * sizeof (struct attr_abbrev))); | |
c906108c | 14920 | } |
ae038cb0 | 14921 | |
f3dd6933 DJ |
14922 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
14923 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
14924 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
14925 | abbrev_ptr += bytes_read; | |
14926 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14927 | abbrev_ptr += bytes_read; | |
14928 | } | |
14929 | ||
433df2d4 | 14930 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
14931 | (cur_abbrev->num_attrs |
14932 | * sizeof (struct attr_abbrev))); | |
14933 | memcpy (cur_abbrev->attrs, cur_attrs, | |
14934 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
14935 | ||
433df2d4 | 14936 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
14937 | |
14938 | /* Get next abbreviation. | |
14939 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
14940 | always properly terminated with an abbrev number of 0. |
14941 | Exit loop if we encounter an abbreviation which we have | |
14942 | already read (which means we are about to read the abbreviations | |
14943 | for the next compile unit) or if the end of the abbreviation | |
14944 | table is reached. */ | |
433df2d4 | 14945 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
14946 | break; |
14947 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14948 | abbrev_ptr += bytes_read; | |
433df2d4 | 14949 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
14950 | break; |
14951 | } | |
f3dd6933 DJ |
14952 | |
14953 | xfree (cur_attrs); | |
433df2d4 | 14954 | return abbrev_table; |
c906108c SS |
14955 | } |
14956 | ||
433df2d4 | 14957 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 14958 | |
c906108c | 14959 | static void |
433df2d4 | 14960 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 14961 | { |
433df2d4 DE |
14962 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
14963 | xfree (abbrev_table); | |
c906108c SS |
14964 | } |
14965 | ||
f4dc4d17 DE |
14966 | /* Same as abbrev_table_free but as a cleanup. |
14967 | We pass in a pointer to the pointer to the table so that we can | |
14968 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 14969 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
14970 | |
14971 | static void | |
14972 | abbrev_table_free_cleanup (void *table_ptr) | |
14973 | { | |
14974 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
14975 | ||
14976 | if (*abbrev_table_ptr != NULL) | |
14977 | abbrev_table_free (*abbrev_table_ptr); | |
14978 | *abbrev_table_ptr = NULL; | |
14979 | } | |
14980 | ||
433df2d4 DE |
14981 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
14982 | ||
14983 | static void | |
14984 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
14985 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 14986 | { |
433df2d4 DE |
14987 | cu->abbrev_table = |
14988 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
14989 | } | |
c906108c | 14990 | |
433df2d4 | 14991 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 14992 | |
433df2d4 DE |
14993 | static void |
14994 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
14995 | { | |
14996 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 14997 | |
a2ce51a0 DE |
14998 | if (cu->abbrev_table != NULL) |
14999 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
15000 | /* Set this to NULL so that we SEGV if we try to read it later, |
15001 | and also because free_comp_unit verifies this is NULL. */ | |
15002 | cu->abbrev_table = NULL; | |
15003 | } | |
15004 | \f | |
72bf9492 DJ |
15005 | /* Returns nonzero if TAG represents a type that we might generate a partial |
15006 | symbol for. */ | |
15007 | ||
15008 | static int | |
15009 | is_type_tag_for_partial (int tag) | |
15010 | { | |
15011 | switch (tag) | |
15012 | { | |
15013 | #if 0 | |
15014 | /* Some types that would be reasonable to generate partial symbols for, | |
15015 | that we don't at present. */ | |
15016 | case DW_TAG_array_type: | |
15017 | case DW_TAG_file_type: | |
15018 | case DW_TAG_ptr_to_member_type: | |
15019 | case DW_TAG_set_type: | |
15020 | case DW_TAG_string_type: | |
15021 | case DW_TAG_subroutine_type: | |
15022 | #endif | |
15023 | case DW_TAG_base_type: | |
15024 | case DW_TAG_class_type: | |
680b30c7 | 15025 | case DW_TAG_interface_type: |
72bf9492 DJ |
15026 | case DW_TAG_enumeration_type: |
15027 | case DW_TAG_structure_type: | |
15028 | case DW_TAG_subrange_type: | |
15029 | case DW_TAG_typedef: | |
15030 | case DW_TAG_union_type: | |
15031 | return 1; | |
15032 | default: | |
15033 | return 0; | |
15034 | } | |
15035 | } | |
15036 | ||
15037 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
15038 | ||
15039 | static struct partial_die_info * | |
dee91e82 | 15040 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 15041 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 15042 | { |
dee91e82 | 15043 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15044 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
15045 | struct partial_die_info *part_die; |
15046 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
15047 | struct abbrev_info *abbrev; | |
15048 | unsigned int bytes_read; | |
5afb4e99 | 15049 | unsigned int load_all = 0; |
72bf9492 DJ |
15050 | int nesting_level = 1; |
15051 | ||
15052 | parent_die = NULL; | |
15053 | last_die = NULL; | |
15054 | ||
7adf1e79 DE |
15055 | gdb_assert (cu->per_cu != NULL); |
15056 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
15057 | load_all = 1; |
15058 | ||
72bf9492 DJ |
15059 | cu->partial_dies |
15060 | = htab_create_alloc_ex (cu->header.length / 12, | |
15061 | partial_die_hash, | |
15062 | partial_die_eq, | |
15063 | NULL, | |
15064 | &cu->comp_unit_obstack, | |
15065 | hashtab_obstack_allocate, | |
15066 | dummy_obstack_deallocate); | |
15067 | ||
15068 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
15069 | sizeof (struct partial_die_info)); | |
15070 | ||
15071 | while (1) | |
15072 | { | |
15073 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
15074 | ||
15075 | /* A NULL abbrev means the end of a series of children. */ | |
15076 | if (abbrev == NULL) | |
15077 | { | |
15078 | if (--nesting_level == 0) | |
15079 | { | |
15080 | /* PART_DIE was probably the last thing allocated on the | |
15081 | comp_unit_obstack, so we could call obstack_free | |
15082 | here. We don't do that because the waste is small, | |
15083 | and will be cleaned up when we're done with this | |
15084 | compilation unit. This way, we're also more robust | |
15085 | against other users of the comp_unit_obstack. */ | |
15086 | return first_die; | |
15087 | } | |
15088 | info_ptr += bytes_read; | |
15089 | last_die = parent_die; | |
15090 | parent_die = parent_die->die_parent; | |
15091 | continue; | |
15092 | } | |
15093 | ||
98bfdba5 PA |
15094 | /* Check for template arguments. We never save these; if |
15095 | they're seen, we just mark the parent, and go on our way. */ | |
15096 | if (parent_die != NULL | |
15097 | && cu->language == language_cplus | |
15098 | && (abbrev->tag == DW_TAG_template_type_param | |
15099 | || abbrev->tag == DW_TAG_template_value_param)) | |
15100 | { | |
15101 | parent_die->has_template_arguments = 1; | |
15102 | ||
15103 | if (!load_all) | |
15104 | { | |
15105 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 15106 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15107 | continue; |
15108 | } | |
15109 | } | |
15110 | ||
0d99eb77 | 15111 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
15112 | Skip their other children. */ |
15113 | if (!load_all | |
15114 | && cu->language == language_cplus | |
15115 | && parent_die != NULL | |
15116 | && parent_die->tag == DW_TAG_subprogram) | |
15117 | { | |
dee91e82 | 15118 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
15119 | continue; |
15120 | } | |
15121 | ||
5afb4e99 DJ |
15122 | /* Check whether this DIE is interesting enough to save. Normally |
15123 | we would not be interested in members here, but there may be | |
15124 | later variables referencing them via DW_AT_specification (for | |
15125 | static members). */ | |
15126 | if (!load_all | |
15127 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 15128 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
15129 | && abbrev->tag != DW_TAG_enumerator |
15130 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 15131 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 15132 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 15133 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 15134 | && abbrev->tag != DW_TAG_module |
95554aad | 15135 | && abbrev->tag != DW_TAG_member |
74921315 KS |
15136 | && abbrev->tag != DW_TAG_imported_unit |
15137 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
15138 | { |
15139 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15140 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
15141 | continue; |
15142 | } | |
15143 | ||
dee91e82 DE |
15144 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
15145 | info_ptr); | |
72bf9492 DJ |
15146 | |
15147 | /* This two-pass algorithm for processing partial symbols has a | |
15148 | high cost in cache pressure. Thus, handle some simple cases | |
15149 | here which cover the majority of C partial symbols. DIEs | |
15150 | which neither have specification tags in them, nor could have | |
15151 | specification tags elsewhere pointing at them, can simply be | |
15152 | processed and discarded. | |
15153 | ||
15154 | This segment is also optional; scan_partial_symbols and | |
15155 | add_partial_symbol will handle these DIEs if we chain | |
15156 | them in normally. When compilers which do not emit large | |
15157 | quantities of duplicate debug information are more common, | |
15158 | this code can probably be removed. */ | |
15159 | ||
15160 | /* Any complete simple types at the top level (pretty much all | |
15161 | of them, for a language without namespaces), can be processed | |
15162 | directly. */ | |
15163 | if (parent_die == NULL | |
15164 | && part_die->has_specification == 0 | |
15165 | && part_die->is_declaration == 0 | |
d8228535 | 15166 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
15167 | || part_die->tag == DW_TAG_base_type |
15168 | || part_die->tag == DW_TAG_subrange_type)) | |
15169 | { | |
15170 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 15171 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15172 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
15173 | &objfile->static_psymbols, |
15174 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 15175 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15176 | continue; |
15177 | } | |
15178 | ||
d8228535 JK |
15179 | /* The exception for DW_TAG_typedef with has_children above is |
15180 | a workaround of GCC PR debug/47510. In the case of this complaint | |
15181 | type_name_no_tag_or_error will error on such types later. | |
15182 | ||
15183 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
15184 | it could not find the child DIEs referenced later, this is checked | |
15185 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
15186 | ||
15187 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
15188 | complaint (&symfile_complaints, | |
15189 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
15190 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 15191 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 15192 | |
72bf9492 DJ |
15193 | /* If we're at the second level, and we're an enumerator, and |
15194 | our parent has no specification (meaning possibly lives in a | |
15195 | namespace elsewhere), then we can add the partial symbol now | |
15196 | instead of queueing it. */ | |
15197 | if (part_die->tag == DW_TAG_enumerator | |
15198 | && parent_die != NULL | |
15199 | && parent_die->die_parent == NULL | |
15200 | && parent_die->tag == DW_TAG_enumeration_type | |
15201 | && parent_die->has_specification == 0) | |
15202 | { | |
15203 | if (part_die->name == NULL) | |
3e43a32a MS |
15204 | complaint (&symfile_complaints, |
15205 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 15206 | else if (building_psymtab) |
04a679b8 | 15207 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 15208 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
15209 | (cu->language == language_cplus |
15210 | || cu->language == language_java) | |
bb5ed363 DE |
15211 | ? &objfile->global_psymbols |
15212 | : &objfile->static_psymbols, | |
15213 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 15214 | |
dee91e82 | 15215 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
15216 | continue; |
15217 | } | |
15218 | ||
15219 | /* We'll save this DIE so link it in. */ | |
15220 | part_die->die_parent = parent_die; | |
15221 | part_die->die_sibling = NULL; | |
15222 | part_die->die_child = NULL; | |
15223 | ||
15224 | if (last_die && last_die == parent_die) | |
15225 | last_die->die_child = part_die; | |
15226 | else if (last_die) | |
15227 | last_die->die_sibling = part_die; | |
15228 | ||
15229 | last_die = part_die; | |
15230 | ||
15231 | if (first_die == NULL) | |
15232 | first_die = part_die; | |
15233 | ||
15234 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
15235 | find interesting need to be in the hash table, because we | |
15236 | also have the parent/sibling/child chains; only those that we | |
15237 | might refer to by offset later during partial symbol reading. | |
15238 | ||
15239 | For now this means things that might have be the target of a | |
15240 | DW_AT_specification, DW_AT_abstract_origin, or | |
15241 | DW_AT_extension. DW_AT_extension will refer only to | |
15242 | namespaces; DW_AT_abstract_origin refers to functions (and | |
15243 | many things under the function DIE, but we do not recurse | |
15244 | into function DIEs during partial symbol reading) and | |
15245 | possibly variables as well; DW_AT_specification refers to | |
15246 | declarations. Declarations ought to have the DW_AT_declaration | |
15247 | flag. It happens that GCC forgets to put it in sometimes, but | |
15248 | only for functions, not for types. | |
15249 | ||
15250 | Adding more things than necessary to the hash table is harmless | |
15251 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
15252 | wasted time in find_partial_die, when we reread the compilation |
15253 | unit with load_all_dies set. */ | |
72bf9492 | 15254 | |
5afb4e99 | 15255 | if (load_all |
72929c62 | 15256 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 15257 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
15258 | || abbrev->tag == DW_TAG_variable |
15259 | || abbrev->tag == DW_TAG_namespace | |
15260 | || part_die->is_declaration) | |
15261 | { | |
15262 | void **slot; | |
15263 | ||
15264 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 15265 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
15266 | *slot = part_die; |
15267 | } | |
15268 | ||
15269 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
15270 | sizeof (struct partial_die_info)); | |
15271 | ||
15272 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 15273 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
15274 | languages we have to, so that we can get at method physnames |
15275 | to infer fully qualified class names, for DW_AT_specification, | |
15276 | and for C++ template arguments. For C++, we also look one level | |
15277 | inside functions to find template arguments (if the name of the | |
15278 | function does not already contain the template arguments). | |
bc30ff58 JB |
15279 | |
15280 | For Ada, we need to scan the children of subprograms and lexical | |
15281 | blocks as well because Ada allows the definition of nested | |
15282 | entities that could be interesting for the debugger, such as | |
15283 | nested subprograms for instance. */ | |
72bf9492 | 15284 | if (last_die->has_children |
5afb4e99 DJ |
15285 | && (load_all |
15286 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 15287 | || last_die->tag == DW_TAG_module |
72bf9492 | 15288 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
15289 | || (cu->language == language_cplus |
15290 | && last_die->tag == DW_TAG_subprogram | |
15291 | && (last_die->name == NULL | |
15292 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
15293 | || (cu->language != language_c |
15294 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 15295 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 15296 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
15297 | || last_die->tag == DW_TAG_union_type)) |
15298 | || (cu->language == language_ada | |
15299 | && (last_die->tag == DW_TAG_subprogram | |
15300 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
15301 | { |
15302 | nesting_level++; | |
15303 | parent_die = last_die; | |
15304 | continue; | |
15305 | } | |
15306 | ||
15307 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 15308 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
15309 | |
15310 | /* Back to the top, do it again. */ | |
15311 | } | |
15312 | } | |
15313 | ||
c906108c SS |
15314 | /* Read a minimal amount of information into the minimal die structure. */ |
15315 | ||
d521ce57 | 15316 | static const gdb_byte * |
dee91e82 DE |
15317 | read_partial_die (const struct die_reader_specs *reader, |
15318 | struct partial_die_info *part_die, | |
15319 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 15320 | const gdb_byte *info_ptr) |
c906108c | 15321 | { |
dee91e82 | 15322 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 15323 | struct objfile *objfile = cu->objfile; |
d521ce57 | 15324 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 15325 | unsigned int i; |
c906108c | 15326 | struct attribute attr; |
c5aa993b | 15327 | int has_low_pc_attr = 0; |
c906108c | 15328 | int has_high_pc_attr = 0; |
91da1414 | 15329 | int high_pc_relative = 0; |
c906108c | 15330 | |
72bf9492 | 15331 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 15332 | |
b64f50a1 | 15333 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
15334 | |
15335 | info_ptr += abbrev_len; | |
15336 | ||
15337 | if (abbrev == NULL) | |
15338 | return info_ptr; | |
15339 | ||
c906108c SS |
15340 | part_die->tag = abbrev->tag; |
15341 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
15342 | |
15343 | for (i = 0; i < abbrev->num_attrs; ++i) | |
15344 | { | |
dee91e82 | 15345 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
15346 | |
15347 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 15348 | partial symbol table. */ |
c906108c SS |
15349 | switch (attr.name) |
15350 | { | |
15351 | case DW_AT_name: | |
71c25dea TT |
15352 | switch (part_die->tag) |
15353 | { | |
15354 | case DW_TAG_compile_unit: | |
95554aad | 15355 | case DW_TAG_partial_unit: |
348e048f | 15356 | case DW_TAG_type_unit: |
71c25dea TT |
15357 | /* Compilation units have a DW_AT_name that is a filename, not |
15358 | a source language identifier. */ | |
15359 | case DW_TAG_enumeration_type: | |
15360 | case DW_TAG_enumerator: | |
15361 | /* These tags always have simple identifiers already; no need | |
15362 | to canonicalize them. */ | |
15363 | part_die->name = DW_STRING (&attr); | |
15364 | break; | |
15365 | default: | |
15366 | part_die->name | |
15367 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 15368 | &objfile->objfile_obstack); |
71c25dea TT |
15369 | break; |
15370 | } | |
c906108c | 15371 | break; |
31ef98ae | 15372 | case DW_AT_linkage_name: |
c906108c | 15373 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
15374 | /* Note that both forms of linkage name might appear. We |
15375 | assume they will be the same, and we only store the last | |
15376 | one we see. */ | |
94af9270 KS |
15377 | if (cu->language == language_ada) |
15378 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 15379 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
15380 | break; |
15381 | case DW_AT_low_pc: | |
15382 | has_low_pc_attr = 1; | |
31aa7e4e | 15383 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
15384 | break; |
15385 | case DW_AT_high_pc: | |
15386 | has_high_pc_attr = 1; | |
31aa7e4e JB |
15387 | part_die->highpc = attr_value_as_address (&attr); |
15388 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
15389 | high_pc_relative = 1; | |
c906108c SS |
15390 | break; |
15391 | case DW_AT_location: | |
0963b4bd | 15392 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
15393 | if (attr_form_is_block (&attr)) |
15394 | { | |
95554aad | 15395 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 15396 | } |
3690dd37 | 15397 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 15398 | { |
4d3c2250 | 15399 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15400 | } |
15401 | else | |
15402 | { | |
4d3c2250 KB |
15403 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
15404 | "partial symbol information"); | |
8e19ed76 | 15405 | } |
c906108c | 15406 | break; |
c906108c SS |
15407 | case DW_AT_external: |
15408 | part_die->is_external = DW_UNSND (&attr); | |
15409 | break; | |
15410 | case DW_AT_declaration: | |
15411 | part_die->is_declaration = DW_UNSND (&attr); | |
15412 | break; | |
15413 | case DW_AT_type: | |
15414 | part_die->has_type = 1; | |
15415 | break; | |
15416 | case DW_AT_abstract_origin: | |
15417 | case DW_AT_specification: | |
72bf9492 DJ |
15418 | case DW_AT_extension: |
15419 | part_die->has_specification = 1; | |
c764a876 | 15420 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
15421 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
15422 | || cu->per_cu->is_dwz); | |
c906108c SS |
15423 | break; |
15424 | case DW_AT_sibling: | |
15425 | /* Ignore absolute siblings, they might point outside of | |
15426 | the current compile unit. */ | |
15427 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
15428 | complaint (&symfile_complaints, |
15429 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 15430 | else |
b9502d3f WN |
15431 | { |
15432 | unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off; | |
15433 | const gdb_byte *sibling_ptr = buffer + off; | |
15434 | ||
15435 | if (sibling_ptr < info_ptr) | |
15436 | complaint (&symfile_complaints, | |
15437 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
15438 | else if (sibling_ptr > reader->buffer_end) |
15439 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
15440 | else |
15441 | part_die->sibling = sibling_ptr; | |
15442 | } | |
c906108c | 15443 | break; |
fa4028e9 JB |
15444 | case DW_AT_byte_size: |
15445 | part_die->has_byte_size = 1; | |
15446 | break; | |
68511cec CES |
15447 | case DW_AT_calling_convention: |
15448 | /* DWARF doesn't provide a way to identify a program's source-level | |
15449 | entry point. DW_AT_calling_convention attributes are only meant | |
15450 | to describe functions' calling conventions. | |
15451 | ||
15452 | However, because it's a necessary piece of information in | |
15453 | Fortran, and because DW_CC_program is the only piece of debugging | |
15454 | information whose definition refers to a 'main program' at all, | |
15455 | several compilers have begun marking Fortran main programs with | |
15456 | DW_CC_program --- even when those functions use the standard | |
15457 | calling conventions. | |
15458 | ||
15459 | So until DWARF specifies a way to provide this information and | |
15460 | compilers pick up the new representation, we'll support this | |
15461 | practice. */ | |
15462 | if (DW_UNSND (&attr) == DW_CC_program | |
15463 | && cu->language == language_fortran) | |
3d548a53 | 15464 | set_objfile_main_name (objfile, part_die->name, language_fortran); |
68511cec | 15465 | break; |
481860b3 GB |
15466 | case DW_AT_inline: |
15467 | if (DW_UNSND (&attr) == DW_INL_inlined | |
15468 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
15469 | part_die->may_be_inlined = 1; | |
15470 | break; | |
95554aad TT |
15471 | |
15472 | case DW_AT_import: | |
15473 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
15474 | { |
15475 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
15476 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
15477 | || cu->per_cu->is_dwz); | |
15478 | } | |
95554aad TT |
15479 | break; |
15480 | ||
c906108c SS |
15481 | default: |
15482 | break; | |
15483 | } | |
15484 | } | |
15485 | ||
91da1414 MW |
15486 | if (high_pc_relative) |
15487 | part_die->highpc += part_die->lowpc; | |
15488 | ||
9373cf26 JK |
15489 | if (has_low_pc_attr && has_high_pc_attr) |
15490 | { | |
15491 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
15492 | eliminate duplicate copies of functions and vtables and such. | |
15493 | The linker will arbitrarily choose one and discard the others. | |
15494 | The AT_*_pc values for such functions refer to local labels in | |
15495 | these sections. If the section from that file was discarded, the | |
15496 | labels are not in the output, so the relocs get a value of 0. | |
15497 | If this is a discarded function, mark the pc bounds as invalid, | |
15498 | so that GDB will ignore it. */ | |
15499 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15500 | { | |
bb5ed363 | 15501 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15502 | |
15503 | complaint (&symfile_complaints, | |
15504 | _("DW_AT_low_pc %s is zero " | |
15505 | "for DIE at 0x%x [in module %s]"), | |
15506 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 15507 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15508 | } |
15509 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
15510 | else if (part_die->lowpc >= part_die->highpc) | |
15511 | { | |
bb5ed363 | 15512 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
15513 | |
15514 | complaint (&symfile_complaints, | |
15515 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
15516 | "for DIE at 0x%x [in module %s]"), | |
15517 | paddress (gdbarch, part_die->lowpc), | |
15518 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 15519 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
15520 | } |
15521 | else | |
15522 | part_die->has_pc_info = 1; | |
15523 | } | |
85cbf3d3 | 15524 | |
c906108c SS |
15525 | return info_ptr; |
15526 | } | |
15527 | ||
72bf9492 DJ |
15528 | /* Find a cached partial DIE at OFFSET in CU. */ |
15529 | ||
15530 | static struct partial_die_info * | |
b64f50a1 | 15531 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
15532 | { |
15533 | struct partial_die_info *lookup_die = NULL; | |
15534 | struct partial_die_info part_die; | |
15535 | ||
15536 | part_die.offset = offset; | |
b64f50a1 JK |
15537 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
15538 | offset.sect_off); | |
72bf9492 | 15539 | |
72bf9492 DJ |
15540 | return lookup_die; |
15541 | } | |
15542 | ||
348e048f DE |
15543 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
15544 | except in the case of .debug_types DIEs which do not reference | |
15545 | outside their CU (they do however referencing other types via | |
55f1336d | 15546 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
15547 | |
15548 | static struct partial_die_info * | |
36586728 | 15549 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 15550 | { |
bb5ed363 | 15551 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
15552 | struct dwarf2_per_cu_data *per_cu = NULL; |
15553 | struct partial_die_info *pd = NULL; | |
72bf9492 | 15554 | |
36586728 TT |
15555 | if (offset_in_dwz == cu->per_cu->is_dwz |
15556 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
15557 | { |
15558 | pd = find_partial_die_in_comp_unit (offset, cu); | |
15559 | if (pd != NULL) | |
15560 | return pd; | |
0d99eb77 DE |
15561 | /* We missed recording what we needed. |
15562 | Load all dies and try again. */ | |
15563 | per_cu = cu->per_cu; | |
5afb4e99 | 15564 | } |
0d99eb77 DE |
15565 | else |
15566 | { | |
15567 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 15568 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
15569 | { |
15570 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
15571 | " external reference to offset 0x%lx [in module %s].\n"), | |
15572 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
15573 | bfd_get_filename (objfile->obfd)); | |
15574 | } | |
36586728 TT |
15575 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
15576 | objfile); | |
72bf9492 | 15577 | |
0d99eb77 DE |
15578 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
15579 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 15580 | |
0d99eb77 DE |
15581 | per_cu->cu->last_used = 0; |
15582 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
15583 | } | |
5afb4e99 | 15584 | |
dee91e82 DE |
15585 | /* If we didn't find it, and not all dies have been loaded, |
15586 | load them all and try again. */ | |
15587 | ||
5afb4e99 DJ |
15588 | if (pd == NULL && per_cu->load_all_dies == 0) |
15589 | { | |
5afb4e99 | 15590 | per_cu->load_all_dies = 1; |
fd820528 DE |
15591 | |
15592 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
15593 | THIS_CU->cu may already be in use. So we can't just free it and | |
15594 | replace its DIEs with the ones we read in. Instead, we leave those | |
15595 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
15596 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
15597 | set. */ | |
dee91e82 | 15598 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
15599 | |
15600 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
15601 | } | |
15602 | ||
15603 | if (pd == NULL) | |
15604 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
15605 | _("could not find partial DIE 0x%x " |
15606 | "in cache [from module %s]\n"), | |
b64f50a1 | 15607 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 15608 | return pd; |
72bf9492 DJ |
15609 | } |
15610 | ||
abc72ce4 DE |
15611 | /* See if we can figure out if the class lives in a namespace. We do |
15612 | this by looking for a member function; its demangled name will | |
15613 | contain namespace info, if there is any. */ | |
15614 | ||
15615 | static void | |
15616 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
15617 | struct dwarf2_cu *cu) | |
15618 | { | |
15619 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
15620 | what template types look like, because the demangler | |
15621 | frequently doesn't give the same name as the debug info. We | |
15622 | could fix this by only using the demangled name to get the | |
15623 | prefix (but see comment in read_structure_type). */ | |
15624 | ||
15625 | struct partial_die_info *real_pdi; | |
15626 | struct partial_die_info *child_pdi; | |
15627 | ||
15628 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
15629 | we should not do this. We'll prepend the parent's fully qualified | |
15630 | name when we create the partial symbol. */ | |
15631 | ||
15632 | real_pdi = struct_pdi; | |
15633 | while (real_pdi->has_specification) | |
36586728 TT |
15634 | real_pdi = find_partial_die (real_pdi->spec_offset, |
15635 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
15636 | |
15637 | if (real_pdi->die_parent != NULL) | |
15638 | return; | |
15639 | ||
15640 | for (child_pdi = struct_pdi->die_child; | |
15641 | child_pdi != NULL; | |
15642 | child_pdi = child_pdi->die_sibling) | |
15643 | { | |
15644 | if (child_pdi->tag == DW_TAG_subprogram | |
15645 | && child_pdi->linkage_name != NULL) | |
15646 | { | |
15647 | char *actual_class_name | |
15648 | = language_class_name_from_physname (cu->language_defn, | |
15649 | child_pdi->linkage_name); | |
15650 | if (actual_class_name != NULL) | |
15651 | { | |
15652 | struct_pdi->name | |
10f0c4bb TT |
15653 | = obstack_copy0 (&cu->objfile->objfile_obstack, |
15654 | actual_class_name, | |
15655 | strlen (actual_class_name)); | |
abc72ce4 DE |
15656 | xfree (actual_class_name); |
15657 | } | |
15658 | break; | |
15659 | } | |
15660 | } | |
15661 | } | |
15662 | ||
72bf9492 DJ |
15663 | /* Adjust PART_DIE before generating a symbol for it. This function |
15664 | may set the is_external flag or change the DIE's name. */ | |
15665 | ||
15666 | static void | |
15667 | fixup_partial_die (struct partial_die_info *part_die, | |
15668 | struct dwarf2_cu *cu) | |
15669 | { | |
abc72ce4 DE |
15670 | /* Once we've fixed up a die, there's no point in doing so again. |
15671 | This also avoids a memory leak if we were to call | |
15672 | guess_partial_die_structure_name multiple times. */ | |
15673 | if (part_die->fixup_called) | |
15674 | return; | |
15675 | ||
72bf9492 DJ |
15676 | /* If we found a reference attribute and the DIE has no name, try |
15677 | to find a name in the referred to DIE. */ | |
15678 | ||
15679 | if (part_die->name == NULL && part_die->has_specification) | |
15680 | { | |
15681 | struct partial_die_info *spec_die; | |
72bf9492 | 15682 | |
36586728 TT |
15683 | spec_die = find_partial_die (part_die->spec_offset, |
15684 | part_die->spec_is_dwz, cu); | |
72bf9492 | 15685 | |
10b3939b | 15686 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
15687 | |
15688 | if (spec_die->name) | |
15689 | { | |
15690 | part_die->name = spec_die->name; | |
15691 | ||
15692 | /* Copy DW_AT_external attribute if it is set. */ | |
15693 | if (spec_die->is_external) | |
15694 | part_die->is_external = spec_die->is_external; | |
15695 | } | |
15696 | } | |
15697 | ||
15698 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
15699 | |
15700 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 15701 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 15702 | |
abc72ce4 DE |
15703 | /* If there is no parent die to provide a namespace, and there are |
15704 | children, see if we can determine the namespace from their linkage | |
122d1940 | 15705 | name. */ |
abc72ce4 | 15706 | if (cu->language == language_cplus |
8b70b953 | 15707 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
15708 | && part_die->die_parent == NULL |
15709 | && part_die->has_children | |
15710 | && (part_die->tag == DW_TAG_class_type | |
15711 | || part_die->tag == DW_TAG_structure_type | |
15712 | || part_die->tag == DW_TAG_union_type)) | |
15713 | guess_partial_die_structure_name (part_die, cu); | |
15714 | ||
53832f31 TT |
15715 | /* GCC might emit a nameless struct or union that has a linkage |
15716 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
15717 | if (part_die->name == NULL | |
96408a79 SA |
15718 | && (part_die->tag == DW_TAG_class_type |
15719 | || part_die->tag == DW_TAG_interface_type | |
15720 | || part_die->tag == DW_TAG_structure_type | |
15721 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
15722 | && part_die->linkage_name != NULL) |
15723 | { | |
15724 | char *demangled; | |
15725 | ||
8de20a37 | 15726 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
15727 | if (demangled) |
15728 | { | |
96408a79 SA |
15729 | const char *base; |
15730 | ||
15731 | /* Strip any leading namespaces/classes, keep only the base name. | |
15732 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
15733 | base = strrchr (demangled, ':'); | |
15734 | if (base && base > demangled && base[-1] == ':') | |
15735 | base++; | |
15736 | else | |
15737 | base = demangled; | |
15738 | ||
10f0c4bb TT |
15739 | part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack, |
15740 | base, strlen (base)); | |
53832f31 TT |
15741 | xfree (demangled); |
15742 | } | |
15743 | } | |
15744 | ||
abc72ce4 | 15745 | part_die->fixup_called = 1; |
72bf9492 DJ |
15746 | } |
15747 | ||
a8329558 | 15748 | /* Read an attribute value described by an attribute form. */ |
c906108c | 15749 | |
d521ce57 | 15750 | static const gdb_byte * |
dee91e82 DE |
15751 | read_attribute_value (const struct die_reader_specs *reader, |
15752 | struct attribute *attr, unsigned form, | |
d521ce57 | 15753 | const gdb_byte *info_ptr) |
c906108c | 15754 | { |
dee91e82 DE |
15755 | struct dwarf2_cu *cu = reader->cu; |
15756 | bfd *abfd = reader->abfd; | |
e7c27a73 | 15757 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
15758 | unsigned int bytes_read; |
15759 | struct dwarf_block *blk; | |
15760 | ||
a8329558 KW |
15761 | attr->form = form; |
15762 | switch (form) | |
c906108c | 15763 | { |
c906108c | 15764 | case DW_FORM_ref_addr: |
ae411497 | 15765 | if (cu->header.version == 2) |
4568ecf9 | 15766 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 15767 | else |
4568ecf9 DE |
15768 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
15769 | &cu->header, &bytes_read); | |
ae411497 TT |
15770 | info_ptr += bytes_read; |
15771 | break; | |
36586728 TT |
15772 | case DW_FORM_GNU_ref_alt: |
15773 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
15774 | info_ptr += bytes_read; | |
15775 | break; | |
ae411497 | 15776 | case DW_FORM_addr: |
e7c27a73 | 15777 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 15778 | info_ptr += bytes_read; |
c906108c SS |
15779 | break; |
15780 | case DW_FORM_block2: | |
7b5a2f43 | 15781 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15782 | blk->size = read_2_bytes (abfd, info_ptr); |
15783 | info_ptr += 2; | |
15784 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15785 | info_ptr += blk->size; | |
15786 | DW_BLOCK (attr) = blk; | |
15787 | break; | |
15788 | case DW_FORM_block4: | |
7b5a2f43 | 15789 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15790 | blk->size = read_4_bytes (abfd, info_ptr); |
15791 | info_ptr += 4; | |
15792 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15793 | info_ptr += blk->size; | |
15794 | DW_BLOCK (attr) = blk; | |
15795 | break; | |
15796 | case DW_FORM_data2: | |
15797 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
15798 | info_ptr += 2; | |
15799 | break; | |
15800 | case DW_FORM_data4: | |
15801 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
15802 | info_ptr += 4; | |
15803 | break; | |
15804 | case DW_FORM_data8: | |
15805 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
15806 | info_ptr += 8; | |
15807 | break; | |
2dc7f7b3 TT |
15808 | case DW_FORM_sec_offset: |
15809 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
15810 | info_ptr += bytes_read; | |
15811 | break; | |
c906108c | 15812 | case DW_FORM_string: |
9b1c24c8 | 15813 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 15814 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
15815 | info_ptr += bytes_read; |
15816 | break; | |
4bdf3d34 | 15817 | case DW_FORM_strp: |
36586728 TT |
15818 | if (!cu->per_cu->is_dwz) |
15819 | { | |
15820 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
15821 | &bytes_read); | |
15822 | DW_STRING_IS_CANONICAL (attr) = 0; | |
15823 | info_ptr += bytes_read; | |
15824 | break; | |
15825 | } | |
15826 | /* FALLTHROUGH */ | |
15827 | case DW_FORM_GNU_strp_alt: | |
15828 | { | |
15829 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
15830 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
15831 | &bytes_read); | |
15832 | ||
15833 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
15834 | DW_STRING_IS_CANONICAL (attr) = 0; | |
15835 | info_ptr += bytes_read; | |
15836 | } | |
4bdf3d34 | 15837 | break; |
2dc7f7b3 | 15838 | case DW_FORM_exprloc: |
c906108c | 15839 | case DW_FORM_block: |
7b5a2f43 | 15840 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15841 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15842 | info_ptr += bytes_read; | |
15843 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15844 | info_ptr += blk->size; | |
15845 | DW_BLOCK (attr) = blk; | |
15846 | break; | |
15847 | case DW_FORM_block1: | |
7b5a2f43 | 15848 | blk = dwarf_alloc_block (cu); |
c906108c SS |
15849 | blk->size = read_1_byte (abfd, info_ptr); |
15850 | info_ptr += 1; | |
15851 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
15852 | info_ptr += blk->size; | |
15853 | DW_BLOCK (attr) = blk; | |
15854 | break; | |
15855 | case DW_FORM_data1: | |
15856 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
15857 | info_ptr += 1; | |
15858 | break; | |
15859 | case DW_FORM_flag: | |
15860 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
15861 | info_ptr += 1; | |
15862 | break; | |
2dc7f7b3 TT |
15863 | case DW_FORM_flag_present: |
15864 | DW_UNSND (attr) = 1; | |
15865 | break; | |
c906108c SS |
15866 | case DW_FORM_sdata: |
15867 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
15868 | info_ptr += bytes_read; | |
15869 | break; | |
15870 | case DW_FORM_udata: | |
15871 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
15872 | info_ptr += bytes_read; | |
15873 | break; | |
15874 | case DW_FORM_ref1: | |
4568ecf9 DE |
15875 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15876 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
15877 | info_ptr += 1; |
15878 | break; | |
15879 | case DW_FORM_ref2: | |
4568ecf9 DE |
15880 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15881 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
15882 | info_ptr += 2; |
15883 | break; | |
15884 | case DW_FORM_ref4: | |
4568ecf9 DE |
15885 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15886 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
15887 | info_ptr += 4; |
15888 | break; | |
613e1657 | 15889 | case DW_FORM_ref8: |
4568ecf9 DE |
15890 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15891 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
15892 | info_ptr += 8; |
15893 | break; | |
55f1336d | 15894 | case DW_FORM_ref_sig8: |
ac9ec31b | 15895 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
15896 | info_ptr += 8; |
15897 | break; | |
c906108c | 15898 | case DW_FORM_ref_udata: |
4568ecf9 DE |
15899 | DW_UNSND (attr) = (cu->header.offset.sect_off |
15900 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
15901 | info_ptr += bytes_read; |
15902 | break; | |
c906108c | 15903 | case DW_FORM_indirect: |
a8329558 KW |
15904 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15905 | info_ptr += bytes_read; | |
dee91e82 | 15906 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 15907 | break; |
3019eac3 DE |
15908 | case DW_FORM_GNU_addr_index: |
15909 | if (reader->dwo_file == NULL) | |
15910 | { | |
15911 | /* For now flag a hard error. | |
15912 | Later we can turn this into a complaint. */ | |
15913 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
15914 | dwarf_form_name (form), | |
15915 | bfd_get_filename (abfd)); | |
15916 | } | |
15917 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
15918 | info_ptr += bytes_read; | |
15919 | break; | |
15920 | case DW_FORM_GNU_str_index: | |
15921 | if (reader->dwo_file == NULL) | |
15922 | { | |
15923 | /* For now flag a hard error. | |
15924 | Later we can turn this into a complaint if warranted. */ | |
15925 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
15926 | dwarf_form_name (form), | |
15927 | bfd_get_filename (abfd)); | |
15928 | } | |
15929 | { | |
15930 | ULONGEST str_index = | |
15931 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
15932 | ||
342587c4 | 15933 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
15934 | DW_STRING_IS_CANONICAL (attr) = 0; |
15935 | info_ptr += bytes_read; | |
15936 | } | |
15937 | break; | |
c906108c | 15938 | default: |
8a3fe4f8 | 15939 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
15940 | dwarf_form_name (form), |
15941 | bfd_get_filename (abfd)); | |
c906108c | 15942 | } |
28e94949 | 15943 | |
36586728 | 15944 | /* Super hack. */ |
7771576e | 15945 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
15946 | attr->form = DW_FORM_GNU_ref_alt; |
15947 | ||
28e94949 JB |
15948 | /* We have seen instances where the compiler tried to emit a byte |
15949 | size attribute of -1 which ended up being encoded as an unsigned | |
15950 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
15951 | an object of this size seems pretty unlikely so we can relatively | |
15952 | safely treat these cases as if the size attribute was invalid and | |
15953 | treat them as zero by default. */ | |
15954 | if (attr->name == DW_AT_byte_size | |
15955 | && form == DW_FORM_data4 | |
15956 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
15957 | { |
15958 | complaint | |
15959 | (&symfile_complaints, | |
43bbcdc2 PH |
15960 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
15961 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
15962 | DW_UNSND (attr) = 0; |
15963 | } | |
28e94949 | 15964 | |
c906108c SS |
15965 | return info_ptr; |
15966 | } | |
15967 | ||
a8329558 KW |
15968 | /* Read an attribute described by an abbreviated attribute. */ |
15969 | ||
d521ce57 | 15970 | static const gdb_byte * |
dee91e82 DE |
15971 | read_attribute (const struct die_reader_specs *reader, |
15972 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 15973 | const gdb_byte *info_ptr) |
a8329558 KW |
15974 | { |
15975 | attr->name = abbrev->name; | |
dee91e82 | 15976 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
15977 | } |
15978 | ||
0963b4bd | 15979 | /* Read dwarf information from a buffer. */ |
c906108c SS |
15980 | |
15981 | static unsigned int | |
a1855c1d | 15982 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 15983 | { |
fe1b8b76 | 15984 | return bfd_get_8 (abfd, buf); |
c906108c SS |
15985 | } |
15986 | ||
15987 | static int | |
a1855c1d | 15988 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 15989 | { |
fe1b8b76 | 15990 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
15991 | } |
15992 | ||
15993 | static unsigned int | |
a1855c1d | 15994 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 15995 | { |
fe1b8b76 | 15996 | return bfd_get_16 (abfd, buf); |
c906108c SS |
15997 | } |
15998 | ||
21ae7a4d | 15999 | static int |
a1855c1d | 16000 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16001 | { |
16002 | return bfd_get_signed_16 (abfd, buf); | |
16003 | } | |
16004 | ||
c906108c | 16005 | static unsigned int |
a1855c1d | 16006 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16007 | { |
fe1b8b76 | 16008 | return bfd_get_32 (abfd, buf); |
c906108c SS |
16009 | } |
16010 | ||
21ae7a4d | 16011 | static int |
a1855c1d | 16012 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
16013 | { |
16014 | return bfd_get_signed_32 (abfd, buf); | |
16015 | } | |
16016 | ||
93311388 | 16017 | static ULONGEST |
a1855c1d | 16018 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 16019 | { |
fe1b8b76 | 16020 | return bfd_get_64 (abfd, buf); |
c906108c SS |
16021 | } |
16022 | ||
16023 | static CORE_ADDR | |
d521ce57 | 16024 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 16025 | unsigned int *bytes_read) |
c906108c | 16026 | { |
e7c27a73 | 16027 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16028 | CORE_ADDR retval = 0; |
16029 | ||
107d2387 | 16030 | if (cu_header->signed_addr_p) |
c906108c | 16031 | { |
107d2387 AC |
16032 | switch (cu_header->addr_size) |
16033 | { | |
16034 | case 2: | |
fe1b8b76 | 16035 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
16036 | break; |
16037 | case 4: | |
fe1b8b76 | 16038 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
16039 | break; |
16040 | case 8: | |
fe1b8b76 | 16041 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
16042 | break; |
16043 | default: | |
8e65ff28 | 16044 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 16045 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 16046 | bfd_get_filename (abfd)); |
107d2387 AC |
16047 | } |
16048 | } | |
16049 | else | |
16050 | { | |
16051 | switch (cu_header->addr_size) | |
16052 | { | |
16053 | case 2: | |
fe1b8b76 | 16054 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
16055 | break; |
16056 | case 4: | |
fe1b8b76 | 16057 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
16058 | break; |
16059 | case 8: | |
fe1b8b76 | 16060 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
16061 | break; |
16062 | default: | |
8e65ff28 | 16063 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
16064 | _("read_address: bad switch, " |
16065 | "unsigned [in module %s]"), | |
659b0389 | 16066 | bfd_get_filename (abfd)); |
107d2387 | 16067 | } |
c906108c | 16068 | } |
64367e0a | 16069 | |
107d2387 AC |
16070 | *bytes_read = cu_header->addr_size; |
16071 | return retval; | |
c906108c SS |
16072 | } |
16073 | ||
f7ef9339 | 16074 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
16075 | specification allows the initial length to take up either 4 bytes |
16076 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
16077 | bytes describe the length and all offsets will be 8 bytes in length | |
16078 | instead of 4. | |
16079 | ||
f7ef9339 KB |
16080 | An older, non-standard 64-bit format is also handled by this |
16081 | function. The older format in question stores the initial length | |
16082 | as an 8-byte quantity without an escape value. Lengths greater | |
16083 | than 2^32 aren't very common which means that the initial 4 bytes | |
16084 | is almost always zero. Since a length value of zero doesn't make | |
16085 | sense for the 32-bit format, this initial zero can be considered to | |
16086 | be an escape value which indicates the presence of the older 64-bit | |
16087 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
16088 | greater than 4GB. If it becomes necessary to handle lengths |
16089 | somewhat larger than 4GB, we could allow other small values (such | |
16090 | as the non-sensical values of 1, 2, and 3) to also be used as | |
16091 | escape values indicating the presence of the old format. | |
f7ef9339 | 16092 | |
917c78fc MK |
16093 | The value returned via bytes_read should be used to increment the |
16094 | relevant pointer after calling read_initial_length(). | |
c764a876 | 16095 | |
613e1657 KB |
16096 | [ Note: read_initial_length() and read_offset() are based on the |
16097 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 16098 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
16099 | from: |
16100 | ||
f7ef9339 | 16101 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 16102 | |
613e1657 KB |
16103 | This document is only a draft and is subject to change. (So beware.) |
16104 | ||
f7ef9339 | 16105 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
16106 | determined empirically by examining 64-bit ELF files produced by |
16107 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
16108 | |
16109 | - Kevin, July 16, 2002 | |
613e1657 KB |
16110 | ] */ |
16111 | ||
16112 | static LONGEST | |
d521ce57 | 16113 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 16114 | { |
fe1b8b76 | 16115 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 16116 | |
dd373385 | 16117 | if (length == 0xffffffff) |
613e1657 | 16118 | { |
fe1b8b76 | 16119 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 16120 | *bytes_read = 12; |
613e1657 | 16121 | } |
dd373385 | 16122 | else if (length == 0) |
f7ef9339 | 16123 | { |
dd373385 | 16124 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 16125 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 16126 | *bytes_read = 8; |
f7ef9339 | 16127 | } |
613e1657 KB |
16128 | else |
16129 | { | |
16130 | *bytes_read = 4; | |
613e1657 KB |
16131 | } |
16132 | ||
c764a876 DE |
16133 | return length; |
16134 | } | |
dd373385 | 16135 | |
c764a876 DE |
16136 | /* Cover function for read_initial_length. |
16137 | Returns the length of the object at BUF, and stores the size of the | |
16138 | initial length in *BYTES_READ and stores the size that offsets will be in | |
16139 | *OFFSET_SIZE. | |
16140 | If the initial length size is not equivalent to that specified in | |
16141 | CU_HEADER then issue a complaint. | |
16142 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 16143 | |
c764a876 | 16144 | static LONGEST |
d521ce57 | 16145 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
16146 | const struct comp_unit_head *cu_header, |
16147 | unsigned int *bytes_read, | |
16148 | unsigned int *offset_size) | |
16149 | { | |
16150 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
16151 | ||
16152 | gdb_assert (cu_header->initial_length_size == 4 | |
16153 | || cu_header->initial_length_size == 8 | |
16154 | || cu_header->initial_length_size == 12); | |
16155 | ||
16156 | if (cu_header->initial_length_size != *bytes_read) | |
16157 | complaint (&symfile_complaints, | |
16158 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 16159 | |
c764a876 | 16160 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 16161 | return length; |
613e1657 KB |
16162 | } |
16163 | ||
16164 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 16165 | given by cu_header->offset_size. */ |
613e1657 KB |
16166 | |
16167 | static LONGEST | |
d521ce57 TT |
16168 | read_offset (bfd *abfd, const gdb_byte *buf, |
16169 | const struct comp_unit_head *cu_header, | |
891d2f0b | 16170 | unsigned int *bytes_read) |
c764a876 DE |
16171 | { |
16172 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 16173 | |
c764a876 DE |
16174 | *bytes_read = cu_header->offset_size; |
16175 | return offset; | |
16176 | } | |
16177 | ||
16178 | /* Read an offset from the data stream. */ | |
16179 | ||
16180 | static LONGEST | |
d521ce57 | 16181 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
16182 | { |
16183 | LONGEST retval = 0; | |
16184 | ||
c764a876 | 16185 | switch (offset_size) |
613e1657 KB |
16186 | { |
16187 | case 4: | |
fe1b8b76 | 16188 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
16189 | break; |
16190 | case 8: | |
fe1b8b76 | 16191 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
16192 | break; |
16193 | default: | |
8e65ff28 | 16194 | internal_error (__FILE__, __LINE__, |
c764a876 | 16195 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 16196 | bfd_get_filename (abfd)); |
613e1657 KB |
16197 | } |
16198 | ||
917c78fc | 16199 | return retval; |
613e1657 KB |
16200 | } |
16201 | ||
d521ce57 TT |
16202 | static const gdb_byte * |
16203 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
16204 | { |
16205 | /* If the size of a host char is 8 bits, we can return a pointer | |
16206 | to the buffer, otherwise we have to copy the data to a buffer | |
16207 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16208 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 16209 | return buf; |
c906108c SS |
16210 | } |
16211 | ||
d521ce57 TT |
16212 | static const char * |
16213 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
16214 | unsigned int *bytes_read_ptr) | |
c906108c SS |
16215 | { |
16216 | /* If the size of a host char is 8 bits, we can return a pointer | |
16217 | to the string, otherwise we have to copy the string to a buffer | |
16218 | allocated on the temporary obstack. */ | |
4bdf3d34 | 16219 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
16220 | if (*buf == '\0') |
16221 | { | |
16222 | *bytes_read_ptr = 1; | |
16223 | return NULL; | |
16224 | } | |
d521ce57 TT |
16225 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
16226 | return (const char *) buf; | |
4bdf3d34 JJ |
16227 | } |
16228 | ||
d521ce57 | 16229 | static const char * |
cf2c3c16 | 16230 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 16231 | { |
be391dca | 16232 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 16233 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
16234 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
16235 | bfd_get_filename (abfd)); | |
dce234bc | 16236 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
16237 | error (_("DW_FORM_strp pointing outside of " |
16238 | ".debug_str section [in module %s]"), | |
16239 | bfd_get_filename (abfd)); | |
4bdf3d34 | 16240 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 16241 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 16242 | return NULL; |
d521ce57 | 16243 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
16244 | } |
16245 | ||
36586728 TT |
16246 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
16247 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
16248 | the string consists of a single NUL byte, return NULL; otherwise | |
16249 | return a pointer to the string. */ | |
16250 | ||
d521ce57 | 16251 | static const char * |
36586728 TT |
16252 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
16253 | { | |
16254 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
16255 | ||
16256 | if (dwz->str.buffer == NULL) | |
16257 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
16258 | "section [in module %s]"), | |
16259 | bfd_get_filename (dwz->dwz_bfd)); | |
16260 | if (str_offset >= dwz->str.size) | |
16261 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
16262 | ".debug_str section [in module %s]"), | |
16263 | bfd_get_filename (dwz->dwz_bfd)); | |
16264 | gdb_assert (HOST_CHAR_BIT == 8); | |
16265 | if (dwz->str.buffer[str_offset] == '\0') | |
16266 | return NULL; | |
d521ce57 | 16267 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
16268 | } |
16269 | ||
d521ce57 TT |
16270 | static const char * |
16271 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
16272 | const struct comp_unit_head *cu_header, |
16273 | unsigned int *bytes_read_ptr) | |
16274 | { | |
16275 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
16276 | ||
16277 | return read_indirect_string_at_offset (abfd, str_offset); | |
16278 | } | |
16279 | ||
12df843f | 16280 | static ULONGEST |
d521ce57 TT |
16281 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
16282 | unsigned int *bytes_read_ptr) | |
c906108c | 16283 | { |
12df843f | 16284 | ULONGEST result; |
ce5d95e1 | 16285 | unsigned int num_read; |
c906108c SS |
16286 | int i, shift; |
16287 | unsigned char byte; | |
16288 | ||
16289 | result = 0; | |
16290 | shift = 0; | |
16291 | num_read = 0; | |
16292 | i = 0; | |
16293 | while (1) | |
16294 | { | |
fe1b8b76 | 16295 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16296 | buf++; |
16297 | num_read++; | |
12df843f | 16298 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
16299 | if ((byte & 128) == 0) |
16300 | { | |
16301 | break; | |
16302 | } | |
16303 | shift += 7; | |
16304 | } | |
16305 | *bytes_read_ptr = num_read; | |
16306 | return result; | |
16307 | } | |
16308 | ||
12df843f | 16309 | static LONGEST |
d521ce57 TT |
16310 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
16311 | unsigned int *bytes_read_ptr) | |
c906108c | 16312 | { |
12df843f | 16313 | LONGEST result; |
77e0b926 | 16314 | int i, shift, num_read; |
c906108c SS |
16315 | unsigned char byte; |
16316 | ||
16317 | result = 0; | |
16318 | shift = 0; | |
c906108c SS |
16319 | num_read = 0; |
16320 | i = 0; | |
16321 | while (1) | |
16322 | { | |
fe1b8b76 | 16323 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
16324 | buf++; |
16325 | num_read++; | |
12df843f | 16326 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
16327 | shift += 7; |
16328 | if ((byte & 128) == 0) | |
16329 | { | |
16330 | break; | |
16331 | } | |
16332 | } | |
77e0b926 | 16333 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 16334 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
16335 | *bytes_read_ptr = num_read; |
16336 | return result; | |
16337 | } | |
16338 | ||
3019eac3 DE |
16339 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
16340 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
16341 | ADDR_SIZE is the size of addresses from the CU header. */ | |
16342 | ||
16343 | static CORE_ADDR | |
16344 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
16345 | { | |
16346 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16347 | bfd *abfd = objfile->obfd; | |
16348 | const gdb_byte *info_ptr; | |
16349 | ||
16350 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
16351 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
16352 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 16353 | objfile_name (objfile)); |
3019eac3 DE |
16354 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
16355 | error (_("DW_FORM_addr_index pointing outside of " | |
16356 | ".debug_addr section [in module %s]"), | |
4262abfb | 16357 | objfile_name (objfile)); |
3019eac3 DE |
16358 | info_ptr = (dwarf2_per_objfile->addr.buffer |
16359 | + addr_base + addr_index * addr_size); | |
16360 | if (addr_size == 4) | |
16361 | return bfd_get_32 (abfd, info_ptr); | |
16362 | else | |
16363 | return bfd_get_64 (abfd, info_ptr); | |
16364 | } | |
16365 | ||
16366 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
16367 | ||
16368 | static CORE_ADDR | |
16369 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
16370 | { | |
16371 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
16372 | } | |
16373 | ||
16374 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
16375 | ||
16376 | static CORE_ADDR | |
d521ce57 | 16377 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
16378 | unsigned int *bytes_read) |
16379 | { | |
16380 | bfd *abfd = cu->objfile->obfd; | |
16381 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
16382 | ||
16383 | return read_addr_index (cu, addr_index); | |
16384 | } | |
16385 | ||
16386 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
16387 | back to dwarf2_read_addr_index. */ | |
16388 | ||
16389 | struct dwarf2_read_addr_index_data | |
16390 | { | |
16391 | ULONGEST addr_base; | |
16392 | int addr_size; | |
16393 | }; | |
16394 | ||
16395 | /* die_reader_func for dwarf2_read_addr_index. */ | |
16396 | ||
16397 | static void | |
16398 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 16399 | const gdb_byte *info_ptr, |
3019eac3 DE |
16400 | struct die_info *comp_unit_die, |
16401 | int has_children, | |
16402 | void *data) | |
16403 | { | |
16404 | struct dwarf2_cu *cu = reader->cu; | |
16405 | struct dwarf2_read_addr_index_data *aidata = | |
16406 | (struct dwarf2_read_addr_index_data *) data; | |
16407 | ||
16408 | aidata->addr_base = cu->addr_base; | |
16409 | aidata->addr_size = cu->header.addr_size; | |
16410 | } | |
16411 | ||
16412 | /* Given an index in .debug_addr, fetch the value. | |
16413 | NOTE: This can be called during dwarf expression evaluation, | |
16414 | long after the debug information has been read, and thus per_cu->cu | |
16415 | may no longer exist. */ | |
16416 | ||
16417 | CORE_ADDR | |
16418 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
16419 | unsigned int addr_index) | |
16420 | { | |
16421 | struct objfile *objfile = per_cu->objfile; | |
16422 | struct dwarf2_cu *cu = per_cu->cu; | |
16423 | ULONGEST addr_base; | |
16424 | int addr_size; | |
16425 | ||
16426 | /* This is intended to be called from outside this file. */ | |
16427 | dw2_setup (objfile); | |
16428 | ||
16429 | /* We need addr_base and addr_size. | |
16430 | If we don't have PER_CU->cu, we have to get it. | |
16431 | Nasty, but the alternative is storing the needed info in PER_CU, | |
16432 | which at this point doesn't seem justified: it's not clear how frequently | |
16433 | it would get used and it would increase the size of every PER_CU. | |
16434 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
16435 | so we're not in uncharted territory here. | |
16436 | Alas we need to be a bit more complicated as addr_base is contained | |
16437 | in the DIE. | |
16438 | ||
16439 | We don't need to read the entire CU(/TU). | |
16440 | We just need the header and top level die. | |
a1b64ce1 | 16441 | |
3019eac3 | 16442 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 16443 | For now we skip this optimization. */ |
3019eac3 DE |
16444 | |
16445 | if (cu != NULL) | |
16446 | { | |
16447 | addr_base = cu->addr_base; | |
16448 | addr_size = cu->header.addr_size; | |
16449 | } | |
16450 | else | |
16451 | { | |
16452 | struct dwarf2_read_addr_index_data aidata; | |
16453 | ||
a1b64ce1 DE |
16454 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
16455 | we need addr_base. */ | |
16456 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
16457 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
16458 | addr_base = aidata.addr_base; |
16459 | addr_size = aidata.addr_size; | |
16460 | } | |
16461 | ||
16462 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
16463 | } | |
16464 | ||
57d63ce2 DE |
16465 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
16466 | This is only used by the Fission support. */ | |
3019eac3 | 16467 | |
d521ce57 | 16468 | static const char * |
342587c4 | 16469 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
16470 | { |
16471 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 16472 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 16473 | bfd *abfd = objfile->obfd; |
342587c4 | 16474 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
16475 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
16476 | struct dwarf2_section_info *str_offsets_section = | |
16477 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 16478 | const gdb_byte *info_ptr; |
3019eac3 | 16479 | ULONGEST str_offset; |
57d63ce2 | 16480 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 16481 | |
73869dc2 DE |
16482 | dwarf2_read_section (objfile, str_section); |
16483 | dwarf2_read_section (objfile, str_offsets_section); | |
16484 | if (str_section->buffer == NULL) | |
57d63ce2 | 16485 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 16486 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16487 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16488 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 16489 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 16490 | " in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16491 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16492 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 16493 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 16494 | " section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16495 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16496 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
16497 | + str_index * cu->header.offset_size); |
16498 | if (cu->header.offset_size == 4) | |
16499 | str_offset = bfd_get_32 (abfd, info_ptr); | |
16500 | else | |
16501 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 16502 | if (str_offset >= str_section->size) |
57d63ce2 | 16503 | error (_("Offset from %s pointing outside of" |
3019eac3 | 16504 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
c5164cbc | 16505 | form_name, (long) cu->header.offset.sect_off, objf_name); |
73869dc2 | 16506 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
16507 | } |
16508 | ||
3019eac3 DE |
16509 | /* Return the length of an LEB128 number in BUF. */ |
16510 | ||
16511 | static int | |
16512 | leb128_size (const gdb_byte *buf) | |
16513 | { | |
16514 | const gdb_byte *begin = buf; | |
16515 | gdb_byte byte; | |
16516 | ||
16517 | while (1) | |
16518 | { | |
16519 | byte = *buf++; | |
16520 | if ((byte & 128) == 0) | |
16521 | return buf - begin; | |
16522 | } | |
16523 | } | |
16524 | ||
c906108c | 16525 | static void |
e142c38c | 16526 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
16527 | { |
16528 | switch (lang) | |
16529 | { | |
16530 | case DW_LANG_C89: | |
76bee0cc | 16531 | case DW_LANG_C99: |
c906108c | 16532 | case DW_LANG_C: |
d1be3247 | 16533 | case DW_LANG_UPC: |
e142c38c | 16534 | cu->language = language_c; |
c906108c SS |
16535 | break; |
16536 | case DW_LANG_C_plus_plus: | |
e142c38c | 16537 | cu->language = language_cplus; |
c906108c | 16538 | break; |
6aecb9c2 JB |
16539 | case DW_LANG_D: |
16540 | cu->language = language_d; | |
16541 | break; | |
c906108c SS |
16542 | case DW_LANG_Fortran77: |
16543 | case DW_LANG_Fortran90: | |
b21b22e0 | 16544 | case DW_LANG_Fortran95: |
e142c38c | 16545 | cu->language = language_fortran; |
c906108c | 16546 | break; |
a766d390 DE |
16547 | case DW_LANG_Go: |
16548 | cu->language = language_go; | |
16549 | break; | |
c906108c | 16550 | case DW_LANG_Mips_Assembler: |
e142c38c | 16551 | cu->language = language_asm; |
c906108c | 16552 | break; |
bebd888e | 16553 | case DW_LANG_Java: |
e142c38c | 16554 | cu->language = language_java; |
bebd888e | 16555 | break; |
c906108c | 16556 | case DW_LANG_Ada83: |
8aaf0b47 | 16557 | case DW_LANG_Ada95: |
bc5f45f8 JB |
16558 | cu->language = language_ada; |
16559 | break; | |
72019c9c GM |
16560 | case DW_LANG_Modula2: |
16561 | cu->language = language_m2; | |
16562 | break; | |
fe8e67fd PM |
16563 | case DW_LANG_Pascal83: |
16564 | cu->language = language_pascal; | |
16565 | break; | |
22566fbd DJ |
16566 | case DW_LANG_ObjC: |
16567 | cu->language = language_objc; | |
16568 | break; | |
c906108c SS |
16569 | case DW_LANG_Cobol74: |
16570 | case DW_LANG_Cobol85: | |
c906108c | 16571 | default: |
e142c38c | 16572 | cu->language = language_minimal; |
c906108c SS |
16573 | break; |
16574 | } | |
e142c38c | 16575 | cu->language_defn = language_def (cu->language); |
c906108c SS |
16576 | } |
16577 | ||
16578 | /* Return the named attribute or NULL if not there. */ | |
16579 | ||
16580 | static struct attribute * | |
e142c38c | 16581 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 16582 | { |
a48e046c | 16583 | for (;;) |
c906108c | 16584 | { |
a48e046c TT |
16585 | unsigned int i; |
16586 | struct attribute *spec = NULL; | |
16587 | ||
16588 | for (i = 0; i < die->num_attrs; ++i) | |
16589 | { | |
16590 | if (die->attrs[i].name == name) | |
16591 | return &die->attrs[i]; | |
16592 | if (die->attrs[i].name == DW_AT_specification | |
16593 | || die->attrs[i].name == DW_AT_abstract_origin) | |
16594 | spec = &die->attrs[i]; | |
16595 | } | |
16596 | ||
16597 | if (!spec) | |
16598 | break; | |
c906108c | 16599 | |
f2f0e013 | 16600 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 16601 | } |
c5aa993b | 16602 | |
c906108c SS |
16603 | return NULL; |
16604 | } | |
16605 | ||
348e048f DE |
16606 | /* Return the named attribute or NULL if not there, |
16607 | but do not follow DW_AT_specification, etc. | |
16608 | This is for use in contexts where we're reading .debug_types dies. | |
16609 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
16610 | back up the chain, and we want to go down. */ | |
16611 | ||
16612 | static struct attribute * | |
45e58e77 | 16613 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
16614 | { |
16615 | unsigned int i; | |
16616 | ||
16617 | for (i = 0; i < die->num_attrs; ++i) | |
16618 | if (die->attrs[i].name == name) | |
16619 | return &die->attrs[i]; | |
16620 | ||
16621 | return NULL; | |
16622 | } | |
16623 | ||
05cf31d1 JB |
16624 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
16625 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 16626 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
16627 | |
16628 | static int | |
16629 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
16630 | { | |
16631 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
16632 | ||
16633 | return (attr && DW_UNSND (attr)); | |
16634 | } | |
16635 | ||
3ca72b44 | 16636 | static int |
e142c38c | 16637 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 16638 | { |
05cf31d1 JB |
16639 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
16640 | which value is non-zero. However, we have to be careful with | |
16641 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
16642 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
16643 | end up accidently finding a declaration attribute that belongs | |
16644 | to a different DIE referenced by the specification attribute, | |
16645 | even though the given DIE does not have a declaration attribute. */ | |
16646 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
16647 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
16648 | } |
16649 | ||
63d06c5c | 16650 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 16651 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
16652 | containing the return value on output. If there is no |
16653 | specification, but there is an abstract origin, that is | |
16654 | returned. */ | |
63d06c5c DC |
16655 | |
16656 | static struct die_info * | |
f2f0e013 | 16657 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 16658 | { |
f2f0e013 DJ |
16659 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
16660 | *spec_cu); | |
63d06c5c | 16661 | |
edb3359d DJ |
16662 | if (spec_attr == NULL) |
16663 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
16664 | ||
63d06c5c DC |
16665 | if (spec_attr == NULL) |
16666 | return NULL; | |
16667 | else | |
f2f0e013 | 16668 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 16669 | } |
c906108c | 16670 | |
debd256d | 16671 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
16672 | refers to. |
16673 | NOTE: This is also used as a "cleanup" function. */ | |
16674 | ||
debd256d JB |
16675 | static void |
16676 | free_line_header (struct line_header *lh) | |
16677 | { | |
16678 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 16679 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
16680 | |
16681 | /* Remember that all the lh->file_names[i].name pointers are | |
16682 | pointers into debug_line_buffer, and don't need to be freed. */ | |
16683 | if (lh->file_names) | |
a8bc7b56 | 16684 | xfree (lh->file_names); |
debd256d JB |
16685 | |
16686 | /* Similarly for the include directory names. */ | |
16687 | if (lh->include_dirs) | |
a8bc7b56 | 16688 | xfree (lh->include_dirs); |
debd256d | 16689 | |
a8bc7b56 | 16690 | xfree (lh); |
debd256d JB |
16691 | } |
16692 | ||
debd256d | 16693 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 16694 | |
debd256d | 16695 | static void |
d521ce57 | 16696 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 16697 | { |
debd256d JB |
16698 | /* Grow the array if necessary. */ |
16699 | if (lh->include_dirs_size == 0) | |
c5aa993b | 16700 | { |
debd256d JB |
16701 | lh->include_dirs_size = 1; /* for testing */ |
16702 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
16703 | * sizeof (*lh->include_dirs)); | |
16704 | } | |
16705 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
16706 | { | |
16707 | lh->include_dirs_size *= 2; | |
16708 | lh->include_dirs = xrealloc (lh->include_dirs, | |
16709 | (lh->include_dirs_size | |
16710 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 16711 | } |
c906108c | 16712 | |
debd256d JB |
16713 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
16714 | } | |
6e70227d | 16715 | |
debd256d | 16716 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 16717 | |
debd256d JB |
16718 | static void |
16719 | add_file_name (struct line_header *lh, | |
d521ce57 | 16720 | const char *name, |
debd256d JB |
16721 | unsigned int dir_index, |
16722 | unsigned int mod_time, | |
16723 | unsigned int length) | |
16724 | { | |
16725 | struct file_entry *fe; | |
16726 | ||
16727 | /* Grow the array if necessary. */ | |
16728 | if (lh->file_names_size == 0) | |
16729 | { | |
16730 | lh->file_names_size = 1; /* for testing */ | |
16731 | lh->file_names = xmalloc (lh->file_names_size | |
16732 | * sizeof (*lh->file_names)); | |
16733 | } | |
16734 | else if (lh->num_file_names >= lh->file_names_size) | |
16735 | { | |
16736 | lh->file_names_size *= 2; | |
16737 | lh->file_names = xrealloc (lh->file_names, | |
16738 | (lh->file_names_size | |
16739 | * sizeof (*lh->file_names))); | |
16740 | } | |
16741 | ||
16742 | fe = &lh->file_names[lh->num_file_names++]; | |
16743 | fe->name = name; | |
16744 | fe->dir_index = dir_index; | |
16745 | fe->mod_time = mod_time; | |
16746 | fe->length = length; | |
aaa75496 | 16747 | fe->included_p = 0; |
cb1df416 | 16748 | fe->symtab = NULL; |
debd256d | 16749 | } |
6e70227d | 16750 | |
36586728 TT |
16751 | /* A convenience function to find the proper .debug_line section for a |
16752 | CU. */ | |
16753 | ||
16754 | static struct dwarf2_section_info * | |
16755 | get_debug_line_section (struct dwarf2_cu *cu) | |
16756 | { | |
16757 | struct dwarf2_section_info *section; | |
16758 | ||
16759 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
16760 | DWO file. */ | |
16761 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
16762 | section = &cu->dwo_unit->dwo_file->sections.line; | |
16763 | else if (cu->per_cu->is_dwz) | |
16764 | { | |
16765 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16766 | ||
16767 | section = &dwz->line; | |
16768 | } | |
16769 | else | |
16770 | section = &dwarf2_per_objfile->line; | |
16771 | ||
16772 | return section; | |
16773 | } | |
16774 | ||
debd256d | 16775 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 16776 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 16777 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
16778 | |
16779 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
16780 | the returned object point into the dwarf line section buffer, |
16781 | and must not be freed. */ | |
ae2de4f8 | 16782 | |
debd256d | 16783 | static struct line_header * |
3019eac3 | 16784 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
16785 | { |
16786 | struct cleanup *back_to; | |
16787 | struct line_header *lh; | |
d521ce57 | 16788 | const gdb_byte *line_ptr; |
c764a876 | 16789 | unsigned int bytes_read, offset_size; |
debd256d | 16790 | int i; |
d521ce57 | 16791 | const char *cur_dir, *cur_file; |
3019eac3 DE |
16792 | struct dwarf2_section_info *section; |
16793 | bfd *abfd; | |
16794 | ||
36586728 | 16795 | section = get_debug_line_section (cu); |
3019eac3 DE |
16796 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
16797 | if (section->buffer == NULL) | |
debd256d | 16798 | { |
3019eac3 DE |
16799 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
16800 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
16801 | else | |
16802 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
16803 | return 0; |
16804 | } | |
16805 | ||
fceca515 DE |
16806 | /* We can't do this until we know the section is non-empty. |
16807 | Only then do we know we have such a section. */ | |
a32a8923 | 16808 | abfd = get_section_bfd_owner (section); |
fceca515 | 16809 | |
a738430d MK |
16810 | /* Make sure that at least there's room for the total_length field. |
16811 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 16812 | if (offset + 4 >= section->size) |
debd256d | 16813 | { |
4d3c2250 | 16814 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
16815 | return 0; |
16816 | } | |
16817 | ||
16818 | lh = xmalloc (sizeof (*lh)); | |
16819 | memset (lh, 0, sizeof (*lh)); | |
16820 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
16821 | (void *) lh); | |
16822 | ||
3019eac3 | 16823 | line_ptr = section->buffer + offset; |
debd256d | 16824 | |
a738430d | 16825 | /* Read in the header. */ |
6e70227d | 16826 | lh->total_length = |
c764a876 DE |
16827 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
16828 | &bytes_read, &offset_size); | |
debd256d | 16829 | line_ptr += bytes_read; |
3019eac3 | 16830 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 16831 | { |
4d3c2250 | 16832 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 16833 | do_cleanups (back_to); |
debd256d JB |
16834 | return 0; |
16835 | } | |
16836 | lh->statement_program_end = line_ptr + lh->total_length; | |
16837 | lh->version = read_2_bytes (abfd, line_ptr); | |
16838 | line_ptr += 2; | |
c764a876 DE |
16839 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
16840 | line_ptr += offset_size; | |
debd256d JB |
16841 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
16842 | line_ptr += 1; | |
2dc7f7b3 TT |
16843 | if (lh->version >= 4) |
16844 | { | |
16845 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
16846 | line_ptr += 1; | |
16847 | } | |
16848 | else | |
16849 | lh->maximum_ops_per_instruction = 1; | |
16850 | ||
16851 | if (lh->maximum_ops_per_instruction == 0) | |
16852 | { | |
16853 | lh->maximum_ops_per_instruction = 1; | |
16854 | complaint (&symfile_complaints, | |
3e43a32a MS |
16855 | _("invalid maximum_ops_per_instruction " |
16856 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
16857 | } |
16858 | ||
debd256d JB |
16859 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
16860 | line_ptr += 1; | |
16861 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
16862 | line_ptr += 1; | |
16863 | lh->line_range = read_1_byte (abfd, line_ptr); | |
16864 | line_ptr += 1; | |
16865 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
16866 | line_ptr += 1; | |
16867 | lh->standard_opcode_lengths | |
fe1b8b76 | 16868 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
16869 | |
16870 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
16871 | for (i = 1; i < lh->opcode_base; ++i) | |
16872 | { | |
16873 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
16874 | line_ptr += 1; | |
16875 | } | |
16876 | ||
a738430d | 16877 | /* Read directory table. */ |
9b1c24c8 | 16878 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
16879 | { |
16880 | line_ptr += bytes_read; | |
16881 | add_include_dir (lh, cur_dir); | |
16882 | } | |
16883 | line_ptr += bytes_read; | |
16884 | ||
a738430d | 16885 | /* Read file name table. */ |
9b1c24c8 | 16886 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
16887 | { |
16888 | unsigned int dir_index, mod_time, length; | |
16889 | ||
16890 | line_ptr += bytes_read; | |
16891 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16892 | line_ptr += bytes_read; | |
16893 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16894 | line_ptr += bytes_read; | |
16895 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16896 | line_ptr += bytes_read; | |
16897 | ||
16898 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
16899 | } | |
16900 | line_ptr += bytes_read; | |
6e70227d | 16901 | lh->statement_program_start = line_ptr; |
debd256d | 16902 | |
3019eac3 | 16903 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 16904 | complaint (&symfile_complaints, |
3e43a32a MS |
16905 | _("line number info header doesn't " |
16906 | "fit in `.debug_line' section")); | |
debd256d JB |
16907 | |
16908 | discard_cleanups (back_to); | |
16909 | return lh; | |
16910 | } | |
c906108c | 16911 | |
c6da4cef DE |
16912 | /* Subroutine of dwarf_decode_lines to simplify it. |
16913 | Return the file name of the psymtab for included file FILE_INDEX | |
16914 | in line header LH of PST. | |
16915 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
16916 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
16917 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
16918 | ||
16919 | The function creates dangling cleanup registration. */ | |
c6da4cef | 16920 | |
d521ce57 | 16921 | static const char * |
c6da4cef DE |
16922 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
16923 | const struct partial_symtab *pst, | |
16924 | const char *comp_dir) | |
16925 | { | |
16926 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
16927 | const char *include_name = fe.name; |
16928 | const char *include_name_to_compare = include_name; | |
16929 | const char *dir_name = NULL; | |
72b9f47f TT |
16930 | const char *pst_filename; |
16931 | char *copied_name = NULL; | |
c6da4cef DE |
16932 | int file_is_pst; |
16933 | ||
16934 | if (fe.dir_index) | |
16935 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
16936 | ||
16937 | if (!IS_ABSOLUTE_PATH (include_name) | |
16938 | && (dir_name != NULL || comp_dir != NULL)) | |
16939 | { | |
16940 | /* Avoid creating a duplicate psymtab for PST. | |
16941 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
16942 | Before we do the comparison, however, we need to account | |
16943 | for DIR_NAME and COMP_DIR. | |
16944 | First prepend dir_name (if non-NULL). If we still don't | |
16945 | have an absolute path prepend comp_dir (if non-NULL). | |
16946 | However, the directory we record in the include-file's | |
16947 | psymtab does not contain COMP_DIR (to match the | |
16948 | corresponding symtab(s)). | |
16949 | ||
16950 | Example: | |
16951 | ||
16952 | bash$ cd /tmp | |
16953 | bash$ gcc -g ./hello.c | |
16954 | include_name = "hello.c" | |
16955 | dir_name = "." | |
16956 | DW_AT_comp_dir = comp_dir = "/tmp" | |
16957 | DW_AT_name = "./hello.c" */ | |
16958 | ||
16959 | if (dir_name != NULL) | |
16960 | { | |
d521ce57 TT |
16961 | char *tem = concat (dir_name, SLASH_STRING, |
16962 | include_name, (char *)NULL); | |
16963 | ||
16964 | make_cleanup (xfree, tem); | |
16965 | include_name = tem; | |
c6da4cef | 16966 | include_name_to_compare = include_name; |
c6da4cef DE |
16967 | } |
16968 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
16969 | { | |
d521ce57 TT |
16970 | char *tem = concat (comp_dir, SLASH_STRING, |
16971 | include_name, (char *)NULL); | |
16972 | ||
16973 | make_cleanup (xfree, tem); | |
16974 | include_name_to_compare = tem; | |
c6da4cef DE |
16975 | } |
16976 | } | |
16977 | ||
16978 | pst_filename = pst->filename; | |
16979 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
16980 | { | |
72b9f47f TT |
16981 | copied_name = concat (pst->dirname, SLASH_STRING, |
16982 | pst_filename, (char *)NULL); | |
16983 | pst_filename = copied_name; | |
c6da4cef DE |
16984 | } |
16985 | ||
1e3fad37 | 16986 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 16987 | |
72b9f47f TT |
16988 | if (copied_name != NULL) |
16989 | xfree (copied_name); | |
c6da4cef DE |
16990 | |
16991 | if (file_is_pst) | |
16992 | return NULL; | |
16993 | return include_name; | |
16994 | } | |
16995 | ||
c91513d8 PP |
16996 | /* Ignore this record_line request. */ |
16997 | ||
16998 | static void | |
16999 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
17000 | { | |
17001 | return; | |
17002 | } | |
17003 | ||
f3f5162e DE |
17004 | /* Subroutine of dwarf_decode_lines to simplify it. |
17005 | Process the line number information in LH. */ | |
debd256d | 17006 | |
c906108c | 17007 | static void |
f3f5162e DE |
17008 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
17009 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 17010 | { |
d521ce57 TT |
17011 | const gdb_byte *line_ptr, *extended_end; |
17012 | const gdb_byte *line_end; | |
a8c50c1f | 17013 | unsigned int bytes_read, extended_len; |
c906108c | 17014 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
17015 | CORE_ADDR baseaddr; |
17016 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 17017 | bfd *abfd = objfile->obfd; |
fbf65064 | 17018 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 17019 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 17020 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
17021 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
17022 | = record_line; | |
e142c38c DJ |
17023 | |
17024 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17025 | |
debd256d JB |
17026 | line_ptr = lh->statement_program_start; |
17027 | line_end = lh->statement_program_end; | |
c906108c SS |
17028 | |
17029 | /* Read the statement sequences until there's nothing left. */ | |
17030 | while (line_ptr < line_end) | |
17031 | { | |
17032 | /* state machine registers */ | |
17033 | CORE_ADDR address = 0; | |
17034 | unsigned int file = 1; | |
17035 | unsigned int line = 1; | |
17036 | unsigned int column = 0; | |
debd256d | 17037 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
17038 | int basic_block = 0; |
17039 | int end_sequence = 0; | |
fbf65064 | 17040 | CORE_ADDR addr; |
2dc7f7b3 | 17041 | unsigned char op_index = 0; |
c906108c | 17042 | |
aaa75496 | 17043 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 17044 | { |
aaa75496 | 17045 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
17046 | /* lh->include_dirs and lh->file_names are 0-based, but the |
17047 | directory and file name numbers in the statement program | |
17048 | are 1-based. */ | |
17049 | struct file_entry *fe = &lh->file_names[file - 1]; | |
d521ce57 | 17050 | const char *dir = NULL; |
a738430d | 17051 | |
debd256d JB |
17052 | if (fe->dir_index) |
17053 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
17054 | |
17055 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
17056 | } |
17057 | ||
a738430d | 17058 | /* Decode the table. */ |
c5aa993b | 17059 | while (!end_sequence) |
c906108c SS |
17060 | { |
17061 | op_code = read_1_byte (abfd, line_ptr); | |
17062 | line_ptr += 1; | |
59205f5a JB |
17063 | if (line_ptr > line_end) |
17064 | { | |
17065 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
17066 | break; | |
17067 | } | |
9aa1fe7e | 17068 | |
debd256d | 17069 | if (op_code >= lh->opcode_base) |
6e70227d | 17070 | { |
a738430d | 17071 | /* Special operand. */ |
debd256d | 17072 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
17073 | address += (((op_index + (adj_opcode / lh->line_range)) |
17074 | / lh->maximum_ops_per_instruction) | |
17075 | * lh->minimum_instruction_length); | |
17076 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
17077 | % lh->maximum_ops_per_instruction); | |
debd256d | 17078 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 17079 | if (lh->num_file_names < file || file == 0) |
25e43795 | 17080 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
17081 | /* For now we ignore lines not starting on an |
17082 | instruction boundary. */ | |
17083 | else if (op_index == 0) | |
25e43795 DJ |
17084 | { |
17085 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 17086 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
17087 | { |
17088 | if (last_subfile != current_subfile) | |
17089 | { | |
17090 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17091 | if (last_subfile) | |
c91513d8 | 17092 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
17093 | last_subfile = current_subfile; |
17094 | } | |
25e43795 | 17095 | /* Append row to matrix using current values. */ |
7019d805 | 17096 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 17097 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 17098 | } |
25e43795 | 17099 | } |
ca5f395d | 17100 | basic_block = 0; |
9aa1fe7e GK |
17101 | } |
17102 | else switch (op_code) | |
c906108c SS |
17103 | { |
17104 | case DW_LNS_extended_op: | |
3e43a32a MS |
17105 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
17106 | &bytes_read); | |
473b7be6 | 17107 | line_ptr += bytes_read; |
a8c50c1f | 17108 | extended_end = line_ptr + extended_len; |
c906108c SS |
17109 | extended_op = read_1_byte (abfd, line_ptr); |
17110 | line_ptr += 1; | |
17111 | switch (extended_op) | |
17112 | { | |
17113 | case DW_LNE_end_sequence: | |
c91513d8 | 17114 | p_record_line = record_line; |
c906108c | 17115 | end_sequence = 1; |
c906108c SS |
17116 | break; |
17117 | case DW_LNE_set_address: | |
e7c27a73 | 17118 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
17119 | |
17120 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
17121 | { | |
17122 | /* This line table is for a function which has been | |
17123 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
17124 | ||
17125 | long line_offset | |
36586728 | 17126 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
17127 | |
17128 | complaint (&symfile_complaints, | |
17129 | _(".debug_line address at offset 0x%lx is 0 " | |
17130 | "[in module %s]"), | |
4262abfb | 17131 | line_offset, objfile_name (objfile)); |
c91513d8 PP |
17132 | p_record_line = noop_record_line; |
17133 | } | |
17134 | ||
2dc7f7b3 | 17135 | op_index = 0; |
107d2387 AC |
17136 | line_ptr += bytes_read; |
17137 | address += baseaddr; | |
c906108c SS |
17138 | break; |
17139 | case DW_LNE_define_file: | |
debd256d | 17140 | { |
d521ce57 | 17141 | const char *cur_file; |
debd256d | 17142 | unsigned int dir_index, mod_time, length; |
6e70227d | 17143 | |
3e43a32a MS |
17144 | cur_file = read_direct_string (abfd, line_ptr, |
17145 | &bytes_read); | |
debd256d JB |
17146 | line_ptr += bytes_read; |
17147 | dir_index = | |
17148 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17149 | line_ptr += bytes_read; | |
17150 | mod_time = | |
17151 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17152 | line_ptr += bytes_read; | |
17153 | length = | |
17154 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17155 | line_ptr += bytes_read; | |
17156 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
17157 | } | |
c906108c | 17158 | break; |
d0c6ba3d CC |
17159 | case DW_LNE_set_discriminator: |
17160 | /* The discriminator is not interesting to the debugger; | |
17161 | just ignore it. */ | |
17162 | line_ptr = extended_end; | |
17163 | break; | |
c906108c | 17164 | default: |
4d3c2250 | 17165 | complaint (&symfile_complaints, |
e2e0b3e5 | 17166 | _("mangled .debug_line section")); |
debd256d | 17167 | return; |
c906108c | 17168 | } |
a8c50c1f DJ |
17169 | /* Make sure that we parsed the extended op correctly. If e.g. |
17170 | we expected a different address size than the producer used, | |
17171 | we may have read the wrong number of bytes. */ | |
17172 | if (line_ptr != extended_end) | |
17173 | { | |
17174 | complaint (&symfile_complaints, | |
17175 | _("mangled .debug_line section")); | |
17176 | return; | |
17177 | } | |
c906108c SS |
17178 | break; |
17179 | case DW_LNS_copy: | |
59205f5a | 17180 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
17181 | dwarf2_debug_line_missing_file_complaint (); |
17182 | else | |
366da635 | 17183 | { |
25e43795 | 17184 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 17185 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
17186 | { |
17187 | if (last_subfile != current_subfile) | |
17188 | { | |
17189 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
17190 | if (last_subfile) | |
c91513d8 | 17191 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
17192 | last_subfile = current_subfile; |
17193 | } | |
7019d805 | 17194 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 17195 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 17196 | } |
366da635 | 17197 | } |
c906108c SS |
17198 | basic_block = 0; |
17199 | break; | |
17200 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
17201 | { |
17202 | CORE_ADDR adjust | |
17203 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17204 | ||
17205 | address += (((op_index + adjust) | |
17206 | / lh->maximum_ops_per_instruction) | |
17207 | * lh->minimum_instruction_length); | |
17208 | op_index = ((op_index + adjust) | |
17209 | % lh->maximum_ops_per_instruction); | |
17210 | line_ptr += bytes_read; | |
17211 | } | |
c906108c SS |
17212 | break; |
17213 | case DW_LNS_advance_line: | |
17214 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
17215 | line_ptr += bytes_read; | |
17216 | break; | |
17217 | case DW_LNS_set_file: | |
debd256d | 17218 | { |
a738430d MK |
17219 | /* The arrays lh->include_dirs and lh->file_names are |
17220 | 0-based, but the directory and file name numbers in | |
17221 | the statement program are 1-based. */ | |
debd256d | 17222 | struct file_entry *fe; |
d521ce57 | 17223 | const char *dir = NULL; |
a738430d | 17224 | |
debd256d JB |
17225 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
17226 | line_ptr += bytes_read; | |
59205f5a | 17227 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
17228 | dwarf2_debug_line_missing_file_complaint (); |
17229 | else | |
17230 | { | |
17231 | fe = &lh->file_names[file - 1]; | |
17232 | if (fe->dir_index) | |
17233 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17234 | if (!decode_for_pst_p) | |
17235 | { | |
17236 | last_subfile = current_subfile; | |
17237 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
17238 | } | |
17239 | } | |
debd256d | 17240 | } |
c906108c SS |
17241 | break; |
17242 | case DW_LNS_set_column: | |
17243 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17244 | line_ptr += bytes_read; | |
17245 | break; | |
17246 | case DW_LNS_negate_stmt: | |
17247 | is_stmt = (!is_stmt); | |
17248 | break; | |
17249 | case DW_LNS_set_basic_block: | |
17250 | basic_block = 1; | |
17251 | break; | |
c2c6d25f JM |
17252 | /* Add to the address register of the state machine the |
17253 | address increment value corresponding to special opcode | |
a738430d MK |
17254 | 255. I.e., this value is scaled by the minimum |
17255 | instruction length since special opcode 255 would have | |
b021a221 | 17256 | scaled the increment. */ |
c906108c | 17257 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
17258 | { |
17259 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
17260 | ||
17261 | address += (((op_index + adjust) | |
17262 | / lh->maximum_ops_per_instruction) | |
17263 | * lh->minimum_instruction_length); | |
17264 | op_index = ((op_index + adjust) | |
17265 | % lh->maximum_ops_per_instruction); | |
17266 | } | |
c906108c SS |
17267 | break; |
17268 | case DW_LNS_fixed_advance_pc: | |
17269 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 17270 | op_index = 0; |
c906108c SS |
17271 | line_ptr += 2; |
17272 | break; | |
9aa1fe7e | 17273 | default: |
a738430d MK |
17274 | { |
17275 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 17276 | int i; |
a738430d | 17277 | |
debd256d | 17278 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
17279 | { |
17280 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
17281 | line_ptr += bytes_read; | |
17282 | } | |
17283 | } | |
c906108c SS |
17284 | } |
17285 | } | |
59205f5a JB |
17286 | if (lh->num_file_names < file || file == 0) |
17287 | dwarf2_debug_line_missing_file_complaint (); | |
17288 | else | |
17289 | { | |
17290 | lh->file_names[file - 1].included_p = 1; | |
17291 | if (!decode_for_pst_p) | |
fbf65064 UW |
17292 | { |
17293 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 17294 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 17295 | } |
59205f5a | 17296 | } |
c906108c | 17297 | } |
f3f5162e DE |
17298 | } |
17299 | ||
17300 | /* Decode the Line Number Program (LNP) for the given line_header | |
17301 | structure and CU. The actual information extracted and the type | |
17302 | of structures created from the LNP depends on the value of PST. | |
17303 | ||
17304 | 1. If PST is NULL, then this procedure uses the data from the program | |
17305 | to create all necessary symbol tables, and their linetables. | |
17306 | ||
17307 | 2. If PST is not NULL, this procedure reads the program to determine | |
17308 | the list of files included by the unit represented by PST, and | |
17309 | builds all the associated partial symbol tables. | |
17310 | ||
17311 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
17312 | It is used for relative paths in the line table. | |
17313 | NOTE: When processing partial symtabs (pst != NULL), | |
17314 | comp_dir == pst->dirname. | |
17315 | ||
17316 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
17317 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
17318 | symtab we don't use it in the name of the psymtabs we create. | |
17319 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
17320 | A good testcase for this is mb-inline.exp. */ | |
17321 | ||
17322 | static void | |
17323 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
17324 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
17325 | int want_line_info) | |
17326 | { | |
17327 | struct objfile *objfile = cu->objfile; | |
17328 | const int decode_for_pst_p = (pst != NULL); | |
17329 | struct subfile *first_subfile = current_subfile; | |
17330 | ||
17331 | if (want_line_info) | |
17332 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
17333 | |
17334 | if (decode_for_pst_p) | |
17335 | { | |
17336 | int file_index; | |
17337 | ||
17338 | /* Now that we're done scanning the Line Header Program, we can | |
17339 | create the psymtab of each included file. */ | |
17340 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
17341 | if (lh->file_names[file_index].included_p == 1) | |
17342 | { | |
d521ce57 | 17343 | const char *include_name = |
c6da4cef DE |
17344 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
17345 | if (include_name != NULL) | |
aaa75496 JB |
17346 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
17347 | } | |
17348 | } | |
cb1df416 DJ |
17349 | else |
17350 | { | |
17351 | /* Make sure a symtab is created for every file, even files | |
17352 | which contain only variables (i.e. no code with associated | |
17353 | line numbers). */ | |
cb1df416 | 17354 | int i; |
cb1df416 DJ |
17355 | |
17356 | for (i = 0; i < lh->num_file_names; i++) | |
17357 | { | |
d521ce57 | 17358 | const char *dir = NULL; |
f3f5162e | 17359 | struct file_entry *fe; |
9a619af0 | 17360 | |
cb1df416 DJ |
17361 | fe = &lh->file_names[i]; |
17362 | if (fe->dir_index) | |
17363 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17364 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
17365 | ||
17366 | /* Skip the main file; we don't need it, and it must be | |
17367 | allocated last, so that it will show up before the | |
17368 | non-primary symtabs in the objfile's symtab list. */ | |
17369 | if (current_subfile == first_subfile) | |
17370 | continue; | |
17371 | ||
17372 | if (current_subfile->symtab == NULL) | |
17373 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 17374 | objfile); |
cb1df416 DJ |
17375 | fe->symtab = current_subfile->symtab; |
17376 | } | |
17377 | } | |
c906108c SS |
17378 | } |
17379 | ||
17380 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
17381 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
17382 | or NULL if not known. COMP_DIR is the compilation directory for the |
17383 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
17384 | This routine tries to keep line numbers from identical absolute and |
17385 | relative file names in a common subfile. | |
17386 | ||
17387 | Using the `list' example from the GDB testsuite, which resides in | |
17388 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
17389 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
17390 | ||
c5aa993b JM |
17391 | DW_AT_name: /srcdir/list0.c |
17392 | DW_AT_comp_dir: /compdir | |
357e46e7 | 17393 | files.files[0].name: list0.h |
c5aa993b | 17394 | files.files[0].dir: /srcdir |
357e46e7 | 17395 | files.files[1].name: list0.c |
c5aa993b | 17396 | files.files[1].dir: /srcdir |
c906108c SS |
17397 | |
17398 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
17399 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
17400 | start_subfile will ensure that this happens provided that we pass the | |
17401 | concatenation of files.files[1].dir and files.files[1].name as the | |
17402 | subfile's name. */ | |
c906108c SS |
17403 | |
17404 | static void | |
d521ce57 | 17405 | dwarf2_start_subfile (const char *filename, const char *dirname, |
3e43a32a | 17406 | const char *comp_dir) |
c906108c | 17407 | { |
d521ce57 | 17408 | char *copy = NULL; |
4f1520fb FR |
17409 | |
17410 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
17411 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
17412 | second argument to start_subfile. To be consistent, we do the | |
17413 | same here. In order not to lose the line information directory, | |
17414 | we concatenate it to the filename when it makes sense. | |
17415 | Note that the Dwarf3 standard says (speaking of filenames in line | |
17416 | information): ``The directory index is ignored for file names | |
17417 | that represent full path names''. Thus ignoring dirname in the | |
17418 | `else' branch below isn't an issue. */ | |
c906108c | 17419 | |
d5166ae1 | 17420 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
17421 | { |
17422 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
17423 | filename = copy; | |
17424 | } | |
c906108c | 17425 | |
d521ce57 | 17426 | start_subfile (filename, comp_dir); |
4f1520fb | 17427 | |
d521ce57 TT |
17428 | if (copy != NULL) |
17429 | xfree (copy); | |
c906108c SS |
17430 | } |
17431 | ||
f4dc4d17 DE |
17432 | /* Start a symtab for DWARF. |
17433 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
17434 | ||
17435 | static void | |
17436 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15d034d0 | 17437 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 DE |
17438 | { |
17439 | start_symtab (name, comp_dir, low_pc); | |
17440 | record_debugformat ("DWARF 2"); | |
17441 | record_producer (cu->producer); | |
17442 | ||
17443 | /* We assume that we're processing GCC output. */ | |
17444 | processing_gcc_compilation = 2; | |
17445 | ||
4d4ec4e5 | 17446 | cu->processing_has_namespace_info = 0; |
f4dc4d17 DE |
17447 | } |
17448 | ||
4c2df51b DJ |
17449 | static void |
17450 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 17451 | struct dwarf2_cu *cu) |
4c2df51b | 17452 | { |
e7c27a73 DJ |
17453 | struct objfile *objfile = cu->objfile; |
17454 | struct comp_unit_head *cu_header = &cu->header; | |
17455 | ||
4c2df51b DJ |
17456 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
17457 | code here to turn a symbol with DW_AT_external and a | |
17458 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
17459 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
17460 | with some versions of binutils) where shared libraries could have | |
17461 | relocations against symbols in their debug information - the | |
17462 | minimal symbol would have the right address, but the debug info | |
17463 | would not. It's no longer necessary, because we will explicitly | |
17464 | apply relocations when we read in the debug information now. */ | |
17465 | ||
17466 | /* A DW_AT_location attribute with no contents indicates that a | |
17467 | variable has been optimized away. */ | |
17468 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
17469 | { | |
f1e6e072 | 17470 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
17471 | return; |
17472 | } | |
17473 | ||
17474 | /* Handle one degenerate form of location expression specially, to | |
17475 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
17476 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
17477 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
17478 | |
17479 | if (attr_form_is_block (attr) | |
3019eac3 DE |
17480 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
17481 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
17482 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
17483 | && (DW_BLOCK (attr)->size | |
17484 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 17485 | { |
891d2f0b | 17486 | unsigned int dummy; |
4c2df51b | 17487 | |
3019eac3 DE |
17488 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
17489 | SYMBOL_VALUE_ADDRESS (sym) = | |
17490 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
17491 | else | |
17492 | SYMBOL_VALUE_ADDRESS (sym) = | |
17493 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 17494 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
17495 | fixup_symbol_section (sym, objfile); |
17496 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
17497 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
17498 | return; |
17499 | } | |
17500 | ||
17501 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
17502 | expression evaluator, and use LOC_COMPUTED only when necessary | |
17503 | (i.e. when the value of a register or memory location is | |
17504 | referenced, or a thread-local block, etc.). Then again, it might | |
17505 | not be worthwhile. I'm assuming that it isn't unless performance | |
17506 | or memory numbers show me otherwise. */ | |
17507 | ||
f1e6e072 | 17508 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 17509 | |
f1e6e072 | 17510 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 17511 | cu->has_loclist = 1; |
4c2df51b DJ |
17512 | } |
17513 | ||
c906108c SS |
17514 | /* Given a pointer to a DWARF information entry, figure out if we need |
17515 | to make a symbol table entry for it, and if so, create a new entry | |
17516 | and return a pointer to it. | |
17517 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
17518 | used the passed type. |
17519 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
17520 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
17521 | |
17522 | static struct symbol * | |
34eaf542 TT |
17523 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
17524 | struct symbol *space) | |
c906108c | 17525 | { |
e7c27a73 | 17526 | struct objfile *objfile = cu->objfile; |
c906108c | 17527 | struct symbol *sym = NULL; |
15d034d0 | 17528 | const char *name; |
c906108c SS |
17529 | struct attribute *attr = NULL; |
17530 | struct attribute *attr2 = NULL; | |
e142c38c | 17531 | CORE_ADDR baseaddr; |
e37fd15a SW |
17532 | struct pending **list_to_add = NULL; |
17533 | ||
edb3359d | 17534 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
17535 | |
17536 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 17537 | |
94af9270 | 17538 | name = dwarf2_name (die, cu); |
c906108c SS |
17539 | if (name) |
17540 | { | |
94af9270 | 17541 | const char *linkagename; |
34eaf542 | 17542 | int suppress_add = 0; |
94af9270 | 17543 | |
34eaf542 TT |
17544 | if (space) |
17545 | sym = space; | |
17546 | else | |
e623cf5d | 17547 | sym = allocate_symbol (objfile); |
c906108c | 17548 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
17549 | |
17550 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 17551 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
17552 | linkagename = dwarf2_physname (name, die, cu); |
17553 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 17554 | |
f55ee35c JK |
17555 | /* Fortran does not have mangling standard and the mangling does differ |
17556 | between gfortran, iFort etc. */ | |
17557 | if (cu->language == language_fortran | |
b250c185 | 17558 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 17559 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 17560 | dwarf2_full_name (name, die, cu), |
29df156d | 17561 | NULL); |
f55ee35c | 17562 | |
c906108c | 17563 | /* Default assumptions. |
c5aa993b | 17564 | Use the passed type or decode it from the die. */ |
176620f1 | 17565 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 17566 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
17567 | if (type != NULL) |
17568 | SYMBOL_TYPE (sym) = type; | |
17569 | else | |
e7c27a73 | 17570 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
17571 | attr = dwarf2_attr (die, |
17572 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
17573 | cu); | |
c906108c SS |
17574 | if (attr) |
17575 | { | |
17576 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
17577 | } | |
cb1df416 | 17578 | |
edb3359d DJ |
17579 | attr = dwarf2_attr (die, |
17580 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
17581 | cu); | |
cb1df416 DJ |
17582 | if (attr) |
17583 | { | |
17584 | int file_index = DW_UNSND (attr); | |
9a619af0 | 17585 | |
cb1df416 DJ |
17586 | if (cu->line_header == NULL |
17587 | || file_index > cu->line_header->num_file_names) | |
17588 | complaint (&symfile_complaints, | |
17589 | _("file index out of range")); | |
1c3d648d | 17590 | else if (file_index > 0) |
cb1df416 DJ |
17591 | { |
17592 | struct file_entry *fe; | |
9a619af0 | 17593 | |
cb1df416 DJ |
17594 | fe = &cu->line_header->file_names[file_index - 1]; |
17595 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
17596 | } | |
17597 | } | |
17598 | ||
c906108c SS |
17599 | switch (die->tag) |
17600 | { | |
17601 | case DW_TAG_label: | |
e142c38c | 17602 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 17603 | if (attr) |
31aa7e4e JB |
17604 | SYMBOL_VALUE_ADDRESS (sym) |
17605 | = attr_value_as_address (attr) + baseaddr; | |
0f5238ed TT |
17606 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
17607 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 17608 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 17609 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
17610 | break; |
17611 | case DW_TAG_subprogram: | |
17612 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
17613 | finish_block. */ | |
f1e6e072 | 17614 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 17615 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
17616 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
17617 | || cu->language == language_ada) | |
c906108c | 17618 | { |
2cfa0c8d JB |
17619 | /* Subprograms marked external are stored as a global symbol. |
17620 | Ada subprograms, whether marked external or not, are always | |
17621 | stored as a global symbol, because we want to be able to | |
17622 | access them globally. For instance, we want to be able | |
17623 | to break on a nested subprogram without having to | |
17624 | specify the context. */ | |
e37fd15a | 17625 | list_to_add = &global_symbols; |
c906108c SS |
17626 | } |
17627 | else | |
17628 | { | |
e37fd15a | 17629 | list_to_add = cu->list_in_scope; |
c906108c SS |
17630 | } |
17631 | break; | |
edb3359d DJ |
17632 | case DW_TAG_inlined_subroutine: |
17633 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
17634 | finish_block. */ | |
f1e6e072 | 17635 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 17636 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 17637 | list_to_add = cu->list_in_scope; |
edb3359d | 17638 | break; |
34eaf542 TT |
17639 | case DW_TAG_template_value_param: |
17640 | suppress_add = 1; | |
17641 | /* Fall through. */ | |
72929c62 | 17642 | case DW_TAG_constant: |
c906108c | 17643 | case DW_TAG_variable: |
254e6b9e | 17644 | case DW_TAG_member: |
0963b4bd MS |
17645 | /* Compilation with minimal debug info may result in |
17646 | variables with missing type entries. Change the | |
17647 | misleading `void' type to something sensible. */ | |
c906108c | 17648 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 17649 | SYMBOL_TYPE (sym) |
46bf5051 | 17650 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 17651 | |
e142c38c | 17652 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
17653 | /* In the case of DW_TAG_member, we should only be called for |
17654 | static const members. */ | |
17655 | if (die->tag == DW_TAG_member) | |
17656 | { | |
3863f96c DE |
17657 | /* dwarf2_add_field uses die_is_declaration, |
17658 | so we do the same. */ | |
254e6b9e DE |
17659 | gdb_assert (die_is_declaration (die, cu)); |
17660 | gdb_assert (attr); | |
17661 | } | |
c906108c SS |
17662 | if (attr) |
17663 | { | |
e7c27a73 | 17664 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 17665 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 17666 | if (!suppress_add) |
34eaf542 TT |
17667 | { |
17668 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 17669 | list_to_add = &global_symbols; |
34eaf542 | 17670 | else |
e37fd15a | 17671 | list_to_add = cu->list_in_scope; |
34eaf542 | 17672 | } |
c906108c SS |
17673 | break; |
17674 | } | |
e142c38c | 17675 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
17676 | if (attr) |
17677 | { | |
e7c27a73 | 17678 | var_decode_location (attr, sym, cu); |
e142c38c | 17679 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
17680 | |
17681 | /* Fortran explicitly imports any global symbols to the local | |
17682 | scope by DW_TAG_common_block. */ | |
17683 | if (cu->language == language_fortran && die->parent | |
17684 | && die->parent->tag == DW_TAG_common_block) | |
17685 | attr2 = NULL; | |
17686 | ||
caac4577 JG |
17687 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
17688 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
17689 | && !dwarf2_per_objfile->has_section_at_zero) | |
17690 | { | |
17691 | /* When a static variable is eliminated by the linker, | |
17692 | the corresponding debug information is not stripped | |
17693 | out, but the variable address is set to null; | |
17694 | do not add such variables into symbol table. */ | |
17695 | } | |
17696 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 17697 | { |
f55ee35c JK |
17698 | /* Workaround gfortran PR debug/40040 - it uses |
17699 | DW_AT_location for variables in -fPIC libraries which may | |
17700 | get overriden by other libraries/executable and get | |
17701 | a different address. Resolve it by the minimal symbol | |
17702 | which may come from inferior's executable using copy | |
17703 | relocation. Make this workaround only for gfortran as for | |
17704 | other compilers GDB cannot guess the minimal symbol | |
17705 | Fortran mangling kind. */ | |
17706 | if (cu->language == language_fortran && die->parent | |
17707 | && die->parent->tag == DW_TAG_module | |
17708 | && cu->producer | |
17709 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
f1e6e072 | 17710 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 17711 | |
1c809c68 TT |
17712 | /* A variable with DW_AT_external is never static, |
17713 | but it may be block-scoped. */ | |
17714 | list_to_add = (cu->list_in_scope == &file_symbols | |
17715 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 17716 | } |
c906108c | 17717 | else |
e37fd15a | 17718 | list_to_add = cu->list_in_scope; |
c906108c SS |
17719 | } |
17720 | else | |
17721 | { | |
17722 | /* We do not know the address of this symbol. | |
c5aa993b JM |
17723 | If it is an external symbol and we have type information |
17724 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
17725 | The address of the variable will then be determined from | |
17726 | the minimal symbol table whenever the variable is | |
17727 | referenced. */ | |
e142c38c | 17728 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
17729 | |
17730 | /* Fortran explicitly imports any global symbols to the local | |
17731 | scope by DW_TAG_common_block. */ | |
17732 | if (cu->language == language_fortran && die->parent | |
17733 | && die->parent->tag == DW_TAG_common_block) | |
17734 | { | |
17735 | /* SYMBOL_CLASS doesn't matter here because | |
17736 | read_common_block is going to reset it. */ | |
17737 | if (!suppress_add) | |
17738 | list_to_add = cu->list_in_scope; | |
17739 | } | |
17740 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
17741 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 17742 | { |
0fe7935b DJ |
17743 | /* A variable with DW_AT_external is never static, but it |
17744 | may be block-scoped. */ | |
17745 | list_to_add = (cu->list_in_scope == &file_symbols | |
17746 | ? &global_symbols : cu->list_in_scope); | |
17747 | ||
f1e6e072 | 17748 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 17749 | } |
442ddf59 JK |
17750 | else if (!die_is_declaration (die, cu)) |
17751 | { | |
17752 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
17753 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
17754 | if (!suppress_add) |
17755 | list_to_add = cu->list_in_scope; | |
442ddf59 | 17756 | } |
c906108c SS |
17757 | } |
17758 | break; | |
17759 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
17760 | /* If we are inside a function, mark this as an argument. If |
17761 | not, we might be looking at an argument to an inlined function | |
17762 | when we do not have enough information to show inlined frames; | |
17763 | pretend it's a local variable in that case so that the user can | |
17764 | still see it. */ | |
17765 | if (context_stack_depth > 0 | |
17766 | && context_stack[context_stack_depth - 1].name != NULL) | |
17767 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 17768 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
17769 | if (attr) |
17770 | { | |
e7c27a73 | 17771 | var_decode_location (attr, sym, cu); |
c906108c | 17772 | } |
e142c38c | 17773 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
17774 | if (attr) |
17775 | { | |
e7c27a73 | 17776 | dwarf2_const_value (attr, sym, cu); |
c906108c | 17777 | } |
f346a30d | 17778 | |
e37fd15a | 17779 | list_to_add = cu->list_in_scope; |
c906108c SS |
17780 | break; |
17781 | case DW_TAG_unspecified_parameters: | |
17782 | /* From varargs functions; gdb doesn't seem to have any | |
17783 | interest in this information, so just ignore it for now. | |
17784 | (FIXME?) */ | |
17785 | break; | |
34eaf542 TT |
17786 | case DW_TAG_template_type_param: |
17787 | suppress_add = 1; | |
17788 | /* Fall through. */ | |
c906108c | 17789 | case DW_TAG_class_type: |
680b30c7 | 17790 | case DW_TAG_interface_type: |
c906108c SS |
17791 | case DW_TAG_structure_type: |
17792 | case DW_TAG_union_type: | |
72019c9c | 17793 | case DW_TAG_set_type: |
c906108c | 17794 | case DW_TAG_enumeration_type: |
f1e6e072 | 17795 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 17796 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 17797 | |
63d06c5c | 17798 | { |
987504bb | 17799 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
17800 | really ever be static objects: otherwise, if you try |
17801 | to, say, break of a class's method and you're in a file | |
17802 | which doesn't mention that class, it won't work unless | |
17803 | the check for all static symbols in lookup_symbol_aux | |
17804 | saves you. See the OtherFileClass tests in | |
17805 | gdb.c++/namespace.exp. */ | |
17806 | ||
e37fd15a | 17807 | if (!suppress_add) |
34eaf542 | 17808 | { |
34eaf542 TT |
17809 | list_to_add = (cu->list_in_scope == &file_symbols |
17810 | && (cu->language == language_cplus | |
17811 | || cu->language == language_java) | |
17812 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 17813 | |
64382290 TT |
17814 | /* The semantics of C++ state that "struct foo { |
17815 | ... }" also defines a typedef for "foo". A Java | |
17816 | class declaration also defines a typedef for the | |
17817 | class. */ | |
17818 | if (cu->language == language_cplus | |
17819 | || cu->language == language_java | |
17820 | || cu->language == language_ada) | |
17821 | { | |
17822 | /* The symbol's name is already allocated along | |
17823 | with this objfile, so we don't need to | |
17824 | duplicate it for the type. */ | |
17825 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
17826 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
17827 | } | |
63d06c5c DC |
17828 | } |
17829 | } | |
c906108c SS |
17830 | break; |
17831 | case DW_TAG_typedef: | |
f1e6e072 | 17832 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 17833 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 17834 | list_to_add = cu->list_in_scope; |
63d06c5c | 17835 | break; |
c906108c | 17836 | case DW_TAG_base_type: |
a02abb62 | 17837 | case DW_TAG_subrange_type: |
f1e6e072 | 17838 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 17839 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 17840 | list_to_add = cu->list_in_scope; |
c906108c SS |
17841 | break; |
17842 | case DW_TAG_enumerator: | |
e142c38c | 17843 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
17844 | if (attr) |
17845 | { | |
e7c27a73 | 17846 | dwarf2_const_value (attr, sym, cu); |
c906108c | 17847 | } |
63d06c5c DC |
17848 | { |
17849 | /* NOTE: carlton/2003-11-10: See comment above in the | |
17850 | DW_TAG_class_type, etc. block. */ | |
17851 | ||
e142c38c | 17852 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
17853 | && (cu->language == language_cplus |
17854 | || cu->language == language_java) | |
e142c38c | 17855 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 17856 | } |
c906108c | 17857 | break; |
74921315 | 17858 | case DW_TAG_imported_declaration: |
5c4e30ca | 17859 | case DW_TAG_namespace: |
f1e6e072 | 17860 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 17861 | list_to_add = &global_symbols; |
5c4e30ca | 17862 | break; |
530e8392 KB |
17863 | case DW_TAG_module: |
17864 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
17865 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
17866 | list_to_add = &global_symbols; | |
17867 | break; | |
4357ac6c | 17868 | case DW_TAG_common_block: |
f1e6e072 | 17869 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
17870 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
17871 | add_symbol_to_list (sym, cu->list_in_scope); | |
17872 | break; | |
c906108c SS |
17873 | default: |
17874 | /* Not a tag we recognize. Hopefully we aren't processing | |
17875 | trash data, but since we must specifically ignore things | |
17876 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 17877 | this point. */ |
e2e0b3e5 | 17878 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 17879 | dwarf_tag_name (die->tag)); |
c906108c SS |
17880 | break; |
17881 | } | |
df8a16a1 | 17882 | |
e37fd15a SW |
17883 | if (suppress_add) |
17884 | { | |
17885 | sym->hash_next = objfile->template_symbols; | |
17886 | objfile->template_symbols = sym; | |
17887 | list_to_add = NULL; | |
17888 | } | |
17889 | ||
17890 | if (list_to_add != NULL) | |
17891 | add_symbol_to_list (sym, list_to_add); | |
17892 | ||
df8a16a1 DJ |
17893 | /* For the benefit of old versions of GCC, check for anonymous |
17894 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 17895 | if (!cu->processing_has_namespace_info |
94af9270 | 17896 | && cu->language == language_cplus) |
a10964d1 | 17897 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
17898 | } |
17899 | return (sym); | |
17900 | } | |
17901 | ||
34eaf542 TT |
17902 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
17903 | ||
17904 | static struct symbol * | |
17905 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
17906 | { | |
17907 | return new_symbol_full (die, type, cu, NULL); | |
17908 | } | |
17909 | ||
98bfdba5 PA |
17910 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
17911 | zero-extend it as appropriate for the symbol's type. The DWARF | |
17912 | standard (v4) is not entirely clear about the meaning of using | |
17913 | DW_FORM_dataN for a constant with a signed type, where the type is | |
17914 | wider than the data. The conclusion of a discussion on the DWARF | |
17915 | list was that this is unspecified. We choose to always zero-extend | |
17916 | because that is the interpretation long in use by GCC. */ | |
c906108c | 17917 | |
98bfdba5 | 17918 | static gdb_byte * |
ff39bb5e | 17919 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 17920 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 17921 | { |
e7c27a73 | 17922 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
17923 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
17924 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
17925 | LONGEST l = DW_UNSND (attr); |
17926 | ||
17927 | if (bits < sizeof (*value) * 8) | |
17928 | { | |
17929 | l &= ((LONGEST) 1 << bits) - 1; | |
17930 | *value = l; | |
17931 | } | |
17932 | else if (bits == sizeof (*value) * 8) | |
17933 | *value = l; | |
17934 | else | |
17935 | { | |
17936 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
17937 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
17938 | return bytes; | |
17939 | } | |
17940 | ||
17941 | return NULL; | |
17942 | } | |
17943 | ||
17944 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
17945 | the value does not fit in *VALUE, set *BYTES - either already | |
17946 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
17947 | or, set *BATON, if we translated the constant to a location | |
17948 | expression. */ | |
17949 | ||
17950 | static void | |
ff39bb5e | 17951 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
17952 | const char *name, struct obstack *obstack, |
17953 | struct dwarf2_cu *cu, | |
d521ce57 | 17954 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
17955 | struct dwarf2_locexpr_baton **baton) |
17956 | { | |
17957 | struct objfile *objfile = cu->objfile; | |
17958 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 17959 | struct dwarf_block *blk; |
98bfdba5 PA |
17960 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
17961 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
17962 | ||
17963 | *value = 0; | |
17964 | *bytes = NULL; | |
17965 | *baton = NULL; | |
c906108c SS |
17966 | |
17967 | switch (attr->form) | |
17968 | { | |
17969 | case DW_FORM_addr: | |
3019eac3 | 17970 | case DW_FORM_GNU_addr_index: |
ac56253d | 17971 | { |
ac56253d TT |
17972 | gdb_byte *data; |
17973 | ||
98bfdba5 PA |
17974 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
17975 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 17976 | cu_header->addr_size, |
98bfdba5 | 17977 | TYPE_LENGTH (type)); |
ac56253d TT |
17978 | /* Symbols of this form are reasonably rare, so we just |
17979 | piggyback on the existing location code rather than writing | |
17980 | a new implementation of symbol_computed_ops. */ | |
7919a973 | 17981 | *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton)); |
98bfdba5 PA |
17982 | (*baton)->per_cu = cu->per_cu; |
17983 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 17984 | |
98bfdba5 | 17985 | (*baton)->size = 2 + cu_header->addr_size; |
7919a973 | 17986 | data = obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 17987 | (*baton)->data = data; |
ac56253d TT |
17988 | |
17989 | data[0] = DW_OP_addr; | |
17990 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
17991 | byte_order, DW_ADDR (attr)); | |
17992 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 17993 | } |
c906108c | 17994 | break; |
4ac36638 | 17995 | case DW_FORM_string: |
93b5768b | 17996 | case DW_FORM_strp: |
3019eac3 | 17997 | case DW_FORM_GNU_str_index: |
36586728 | 17998 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
17999 | /* DW_STRING is already allocated on the objfile obstack, point |
18000 | directly to it. */ | |
d521ce57 | 18001 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 18002 | break; |
c906108c SS |
18003 | case DW_FORM_block1: |
18004 | case DW_FORM_block2: | |
18005 | case DW_FORM_block4: | |
18006 | case DW_FORM_block: | |
2dc7f7b3 | 18007 | case DW_FORM_exprloc: |
c906108c | 18008 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
18009 | if (TYPE_LENGTH (type) != blk->size) |
18010 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
18011 | TYPE_LENGTH (type)); | |
18012 | *bytes = blk->data; | |
c906108c | 18013 | break; |
2df3850c JM |
18014 | |
18015 | /* The DW_AT_const_value attributes are supposed to carry the | |
18016 | symbol's value "represented as it would be on the target | |
18017 | architecture." By the time we get here, it's already been | |
18018 | converted to host endianness, so we just need to sign- or | |
18019 | zero-extend it as appropriate. */ | |
18020 | case DW_FORM_data1: | |
3aef2284 | 18021 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 18022 | break; |
c906108c | 18023 | case DW_FORM_data2: |
3aef2284 | 18024 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 18025 | break; |
c906108c | 18026 | case DW_FORM_data4: |
3aef2284 | 18027 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 18028 | break; |
c906108c | 18029 | case DW_FORM_data8: |
3aef2284 | 18030 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
18031 | break; |
18032 | ||
c906108c | 18033 | case DW_FORM_sdata: |
98bfdba5 | 18034 | *value = DW_SND (attr); |
2df3850c JM |
18035 | break; |
18036 | ||
c906108c | 18037 | case DW_FORM_udata: |
98bfdba5 | 18038 | *value = DW_UNSND (attr); |
c906108c | 18039 | break; |
2df3850c | 18040 | |
c906108c | 18041 | default: |
4d3c2250 | 18042 | complaint (&symfile_complaints, |
e2e0b3e5 | 18043 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 18044 | dwarf_form_name (attr->form)); |
98bfdba5 | 18045 | *value = 0; |
c906108c SS |
18046 | break; |
18047 | } | |
18048 | } | |
18049 | ||
2df3850c | 18050 | |
98bfdba5 PA |
18051 | /* Copy constant value from an attribute to a symbol. */ |
18052 | ||
2df3850c | 18053 | static void |
ff39bb5e | 18054 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 18055 | struct dwarf2_cu *cu) |
2df3850c | 18056 | { |
98bfdba5 PA |
18057 | struct objfile *objfile = cu->objfile; |
18058 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 18059 | LONGEST value; |
d521ce57 | 18060 | const gdb_byte *bytes; |
98bfdba5 | 18061 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 18062 | |
98bfdba5 PA |
18063 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
18064 | SYMBOL_PRINT_NAME (sym), | |
18065 | &objfile->objfile_obstack, cu, | |
18066 | &value, &bytes, &baton); | |
2df3850c | 18067 | |
98bfdba5 PA |
18068 | if (baton != NULL) |
18069 | { | |
98bfdba5 | 18070 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 18071 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
18072 | } |
18073 | else if (bytes != NULL) | |
18074 | { | |
18075 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 18076 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
18077 | } |
18078 | else | |
18079 | { | |
18080 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 18081 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 18082 | } |
2df3850c JM |
18083 | } |
18084 | ||
c906108c SS |
18085 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
18086 | ||
18087 | static struct type * | |
e7c27a73 | 18088 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18089 | { |
c906108c | 18090 | struct attribute *type_attr; |
c906108c | 18091 | |
e142c38c | 18092 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
18093 | if (!type_attr) |
18094 | { | |
18095 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 18096 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 18097 | } |
348e048f | 18098 | |
673bfd45 | 18099 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18100 | } |
18101 | ||
b4ba55a1 JB |
18102 | /* True iff CU's producer generates GNAT Ada auxiliary information |
18103 | that allows to find parallel types through that information instead | |
18104 | of having to do expensive parallel lookups by type name. */ | |
18105 | ||
18106 | static int | |
18107 | need_gnat_info (struct dwarf2_cu *cu) | |
18108 | { | |
18109 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
18110 | of GNAT produces this auxiliary information, without any indication | |
18111 | that it is produced. Part of enhancing the FSF version of GNAT | |
18112 | to produce that information will be to put in place an indicator | |
18113 | that we can use in order to determine whether the descriptive type | |
18114 | info is available or not. One suggestion that has been made is | |
18115 | to use a new attribute, attached to the CU die. For now, assume | |
18116 | that the descriptive type info is not available. */ | |
18117 | return 0; | |
18118 | } | |
18119 | ||
b4ba55a1 JB |
18120 | /* Return the auxiliary type of the die in question using its |
18121 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
18122 | attribute is not present. */ | |
18123 | ||
18124 | static struct type * | |
18125 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
18126 | { | |
b4ba55a1 | 18127 | struct attribute *type_attr; |
b4ba55a1 JB |
18128 | |
18129 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
18130 | if (!type_attr) | |
18131 | return NULL; | |
18132 | ||
673bfd45 | 18133 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
18134 | } |
18135 | ||
18136 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
18137 | descriptive type accordingly. */ | |
18138 | ||
18139 | static void | |
18140 | set_descriptive_type (struct type *type, struct die_info *die, | |
18141 | struct dwarf2_cu *cu) | |
18142 | { | |
18143 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
18144 | ||
18145 | if (descriptive_type) | |
18146 | { | |
18147 | ALLOCATE_GNAT_AUX_TYPE (type); | |
18148 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
18149 | } | |
18150 | } | |
18151 | ||
c906108c SS |
18152 | /* Return the containing type of the die in question using its |
18153 | DW_AT_containing_type attribute. */ | |
18154 | ||
18155 | static struct type * | |
e7c27a73 | 18156 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18157 | { |
c906108c | 18158 | struct attribute *type_attr; |
c906108c | 18159 | |
e142c38c | 18160 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
18161 | if (!type_attr) |
18162 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 18163 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 18164 | |
673bfd45 | 18165 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
18166 | } |
18167 | ||
ac9ec31b DE |
18168 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
18169 | ||
18170 | static struct type * | |
18171 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
18172 | { | |
18173 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18174 | char *message, *saved; | |
18175 | ||
18176 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 18177 | objfile_name (objfile), |
ac9ec31b DE |
18178 | cu->header.offset.sect_off, |
18179 | die->offset.sect_off); | |
18180 | saved = obstack_copy0 (&objfile->objfile_obstack, | |
18181 | message, strlen (message)); | |
18182 | xfree (message); | |
18183 | ||
18184 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
18185 | } | |
18186 | ||
673bfd45 | 18187 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
18188 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
18189 | DW_AT_containing_type. | |
673bfd45 DE |
18190 | If there is no type substitute an error marker. */ |
18191 | ||
c906108c | 18192 | static struct type * |
ff39bb5e | 18193 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 18194 | struct dwarf2_cu *cu) |
c906108c | 18195 | { |
bb5ed363 | 18196 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
18197 | struct type *this_type; |
18198 | ||
ac9ec31b DE |
18199 | gdb_assert (attr->name == DW_AT_type |
18200 | || attr->name == DW_AT_GNAT_descriptive_type | |
18201 | || attr->name == DW_AT_containing_type); | |
18202 | ||
673bfd45 DE |
18203 | /* First see if we have it cached. */ |
18204 | ||
36586728 TT |
18205 | if (attr->form == DW_FORM_GNU_ref_alt) |
18206 | { | |
18207 | struct dwarf2_per_cu_data *per_cu; | |
18208 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
18209 | ||
18210 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
18211 | this_type = get_die_type_at_offset (offset, per_cu); | |
18212 | } | |
7771576e | 18213 | else if (attr_form_is_ref (attr)) |
673bfd45 | 18214 | { |
b64f50a1 | 18215 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
18216 | |
18217 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
18218 | } | |
55f1336d | 18219 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 18220 | { |
ac9ec31b | 18221 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 18222 | |
ac9ec31b | 18223 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
18224 | } |
18225 | else | |
18226 | { | |
ac9ec31b DE |
18227 | complaint (&symfile_complaints, |
18228 | _("Dwarf Error: Bad type attribute %s in DIE" | |
18229 | " at 0x%x [in module %s]"), | |
18230 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 18231 | objfile_name (objfile)); |
ac9ec31b | 18232 | return build_error_marker_type (cu, die); |
673bfd45 DE |
18233 | } |
18234 | ||
18235 | /* If not cached we need to read it in. */ | |
18236 | ||
18237 | if (this_type == NULL) | |
18238 | { | |
ac9ec31b | 18239 | struct die_info *type_die = NULL; |
673bfd45 DE |
18240 | struct dwarf2_cu *type_cu = cu; |
18241 | ||
7771576e | 18242 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
18243 | type_die = follow_die_ref (die, attr, &type_cu); |
18244 | if (type_die == NULL) | |
18245 | return build_error_marker_type (cu, die); | |
18246 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
18247 | from an inter-CU reference and the type's CU got expanded before |
18248 | ours. */ | |
ac9ec31b | 18249 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
18250 | } |
18251 | ||
18252 | /* If we still don't have a type use an error marker. */ | |
18253 | ||
18254 | if (this_type == NULL) | |
ac9ec31b | 18255 | return build_error_marker_type (cu, die); |
673bfd45 | 18256 | |
f792889a | 18257 | return this_type; |
c906108c SS |
18258 | } |
18259 | ||
673bfd45 DE |
18260 | /* Return the type in DIE, CU. |
18261 | Returns NULL for invalid types. | |
18262 | ||
02142a6c | 18263 | This first does a lookup in die_type_hash, |
673bfd45 DE |
18264 | and only reads the die in if necessary. |
18265 | ||
18266 | NOTE: This can be called when reading in partial or full symbols. */ | |
18267 | ||
f792889a | 18268 | static struct type * |
e7c27a73 | 18269 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18270 | { |
f792889a DJ |
18271 | struct type *this_type; |
18272 | ||
18273 | this_type = get_die_type (die, cu); | |
18274 | if (this_type) | |
18275 | return this_type; | |
18276 | ||
673bfd45 DE |
18277 | return read_type_die_1 (die, cu); |
18278 | } | |
18279 | ||
18280 | /* Read the type in DIE, CU. | |
18281 | Returns NULL for invalid types. */ | |
18282 | ||
18283 | static struct type * | |
18284 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
18285 | { | |
18286 | struct type *this_type = NULL; | |
18287 | ||
c906108c SS |
18288 | switch (die->tag) |
18289 | { | |
18290 | case DW_TAG_class_type: | |
680b30c7 | 18291 | case DW_TAG_interface_type: |
c906108c SS |
18292 | case DW_TAG_structure_type: |
18293 | case DW_TAG_union_type: | |
f792889a | 18294 | this_type = read_structure_type (die, cu); |
c906108c SS |
18295 | break; |
18296 | case DW_TAG_enumeration_type: | |
f792889a | 18297 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
18298 | break; |
18299 | case DW_TAG_subprogram: | |
18300 | case DW_TAG_subroutine_type: | |
edb3359d | 18301 | case DW_TAG_inlined_subroutine: |
f792889a | 18302 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
18303 | break; |
18304 | case DW_TAG_array_type: | |
f792889a | 18305 | this_type = read_array_type (die, cu); |
c906108c | 18306 | break; |
72019c9c | 18307 | case DW_TAG_set_type: |
f792889a | 18308 | this_type = read_set_type (die, cu); |
72019c9c | 18309 | break; |
c906108c | 18310 | case DW_TAG_pointer_type: |
f792889a | 18311 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
18312 | break; |
18313 | case DW_TAG_ptr_to_member_type: | |
f792889a | 18314 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
18315 | break; |
18316 | case DW_TAG_reference_type: | |
f792889a | 18317 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
18318 | break; |
18319 | case DW_TAG_const_type: | |
f792889a | 18320 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
18321 | break; |
18322 | case DW_TAG_volatile_type: | |
f792889a | 18323 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 18324 | break; |
06d66ee9 TT |
18325 | case DW_TAG_restrict_type: |
18326 | this_type = read_tag_restrict_type (die, cu); | |
18327 | break; | |
c906108c | 18328 | case DW_TAG_string_type: |
f792889a | 18329 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
18330 | break; |
18331 | case DW_TAG_typedef: | |
f792889a | 18332 | this_type = read_typedef (die, cu); |
c906108c | 18333 | break; |
a02abb62 | 18334 | case DW_TAG_subrange_type: |
f792889a | 18335 | this_type = read_subrange_type (die, cu); |
a02abb62 | 18336 | break; |
c906108c | 18337 | case DW_TAG_base_type: |
f792889a | 18338 | this_type = read_base_type (die, cu); |
c906108c | 18339 | break; |
81a17f79 | 18340 | case DW_TAG_unspecified_type: |
f792889a | 18341 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 18342 | break; |
0114d602 DJ |
18343 | case DW_TAG_namespace: |
18344 | this_type = read_namespace_type (die, cu); | |
18345 | break; | |
f55ee35c JK |
18346 | case DW_TAG_module: |
18347 | this_type = read_module_type (die, cu); | |
18348 | break; | |
c906108c | 18349 | default: |
3e43a32a MS |
18350 | complaint (&symfile_complaints, |
18351 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 18352 | dwarf_tag_name (die->tag)); |
c906108c SS |
18353 | break; |
18354 | } | |
63d06c5c | 18355 | |
f792889a | 18356 | return this_type; |
63d06c5c DC |
18357 | } |
18358 | ||
abc72ce4 DE |
18359 | /* See if we can figure out if the class lives in a namespace. We do |
18360 | this by looking for a member function; its demangled name will | |
18361 | contain namespace info, if there is any. | |
18362 | Return the computed name or NULL. | |
18363 | Space for the result is allocated on the objfile's obstack. | |
18364 | This is the full-die version of guess_partial_die_structure_name. | |
18365 | In this case we know DIE has no useful parent. */ | |
18366 | ||
18367 | static char * | |
18368 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
18369 | { | |
18370 | struct die_info *spec_die; | |
18371 | struct dwarf2_cu *spec_cu; | |
18372 | struct die_info *child; | |
18373 | ||
18374 | spec_cu = cu; | |
18375 | spec_die = die_specification (die, &spec_cu); | |
18376 | if (spec_die != NULL) | |
18377 | { | |
18378 | die = spec_die; | |
18379 | cu = spec_cu; | |
18380 | } | |
18381 | ||
18382 | for (child = die->child; | |
18383 | child != NULL; | |
18384 | child = child->sibling) | |
18385 | { | |
18386 | if (child->tag == DW_TAG_subprogram) | |
18387 | { | |
18388 | struct attribute *attr; | |
18389 | ||
18390 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
18391 | if (attr == NULL) | |
18392 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
18393 | if (attr != NULL) | |
18394 | { | |
18395 | char *actual_name | |
18396 | = language_class_name_from_physname (cu->language_defn, | |
18397 | DW_STRING (attr)); | |
18398 | char *name = NULL; | |
18399 | ||
18400 | if (actual_name != NULL) | |
18401 | { | |
15d034d0 | 18402 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
18403 | |
18404 | if (die_name != NULL | |
18405 | && strcmp (die_name, actual_name) != 0) | |
18406 | { | |
18407 | /* Strip off the class name from the full name. | |
18408 | We want the prefix. */ | |
18409 | int die_name_len = strlen (die_name); | |
18410 | int actual_name_len = strlen (actual_name); | |
18411 | ||
18412 | /* Test for '::' as a sanity check. */ | |
18413 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
18414 | && actual_name[actual_name_len |
18415 | - die_name_len - 1] == ':') | |
abc72ce4 | 18416 | name = |
10f0c4bb TT |
18417 | obstack_copy0 (&cu->objfile->objfile_obstack, |
18418 | actual_name, | |
18419 | actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
18420 | } |
18421 | } | |
18422 | xfree (actual_name); | |
18423 | return name; | |
18424 | } | |
18425 | } | |
18426 | } | |
18427 | ||
18428 | return NULL; | |
18429 | } | |
18430 | ||
96408a79 SA |
18431 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
18432 | prefix part in such case. See | |
18433 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
18434 | ||
18435 | static char * | |
18436 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
18437 | { | |
18438 | struct attribute *attr; | |
18439 | char *base; | |
18440 | ||
18441 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
18442 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
18443 | return NULL; | |
18444 | ||
18445 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
18446 | if (attr != NULL && DW_STRING (attr) != NULL) | |
18447 | return NULL; | |
18448 | ||
18449 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
18450 | if (attr == NULL) | |
18451 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
18452 | if (attr == NULL || DW_STRING (attr) == NULL) | |
18453 | return NULL; | |
18454 | ||
18455 | /* dwarf2_name had to be already called. */ | |
18456 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
18457 | ||
18458 | /* Strip the base name, keep any leading namespaces/classes. */ | |
18459 | base = strrchr (DW_STRING (attr), ':'); | |
18460 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
18461 | return ""; | |
18462 | ||
10f0c4bb TT |
18463 | return obstack_copy0 (&cu->objfile->objfile_obstack, |
18464 | DW_STRING (attr), &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
18465 | } |
18466 | ||
fdde2d81 | 18467 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 18468 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 18469 | |
0114d602 DJ |
18470 | For example, if we're within the method foo() in the following |
18471 | code: | |
18472 | ||
18473 | namespace N { | |
18474 | class C { | |
18475 | void foo () { | |
18476 | } | |
18477 | }; | |
18478 | } | |
18479 | ||
18480 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 18481 | |
0d5cff50 | 18482 | static const char * |
e142c38c | 18483 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 18484 | { |
0114d602 DJ |
18485 | struct die_info *parent, *spec_die; |
18486 | struct dwarf2_cu *spec_cu; | |
18487 | struct type *parent_type; | |
96408a79 | 18488 | char *retval; |
63d06c5c | 18489 | |
f55ee35c JK |
18490 | if (cu->language != language_cplus && cu->language != language_java |
18491 | && cu->language != language_fortran) | |
0114d602 DJ |
18492 | return ""; |
18493 | ||
96408a79 SA |
18494 | retval = anonymous_struct_prefix (die, cu); |
18495 | if (retval) | |
18496 | return retval; | |
18497 | ||
0114d602 DJ |
18498 | /* We have to be careful in the presence of DW_AT_specification. |
18499 | For example, with GCC 3.4, given the code | |
18500 | ||
18501 | namespace N { | |
18502 | void foo() { | |
18503 | // Definition of N::foo. | |
18504 | } | |
18505 | } | |
18506 | ||
18507 | then we'll have a tree of DIEs like this: | |
18508 | ||
18509 | 1: DW_TAG_compile_unit | |
18510 | 2: DW_TAG_namespace // N | |
18511 | 3: DW_TAG_subprogram // declaration of N::foo | |
18512 | 4: DW_TAG_subprogram // definition of N::foo | |
18513 | DW_AT_specification // refers to die #3 | |
18514 | ||
18515 | Thus, when processing die #4, we have to pretend that we're in | |
18516 | the context of its DW_AT_specification, namely the contex of die | |
18517 | #3. */ | |
18518 | spec_cu = cu; | |
18519 | spec_die = die_specification (die, &spec_cu); | |
18520 | if (spec_die == NULL) | |
18521 | parent = die->parent; | |
18522 | else | |
63d06c5c | 18523 | { |
0114d602 DJ |
18524 | parent = spec_die->parent; |
18525 | cu = spec_cu; | |
63d06c5c | 18526 | } |
0114d602 DJ |
18527 | |
18528 | if (parent == NULL) | |
18529 | return ""; | |
98bfdba5 PA |
18530 | else if (parent->building_fullname) |
18531 | { | |
18532 | const char *name; | |
18533 | const char *parent_name; | |
18534 | ||
18535 | /* It has been seen on RealView 2.2 built binaries, | |
18536 | DW_TAG_template_type_param types actually _defined_ as | |
18537 | children of the parent class: | |
18538 | ||
18539 | enum E {}; | |
18540 | template class <class Enum> Class{}; | |
18541 | Class<enum E> class_e; | |
18542 | ||
18543 | 1: DW_TAG_class_type (Class) | |
18544 | 2: DW_TAG_enumeration_type (E) | |
18545 | 3: DW_TAG_enumerator (enum1:0) | |
18546 | 3: DW_TAG_enumerator (enum2:1) | |
18547 | ... | |
18548 | 2: DW_TAG_template_type_param | |
18549 | DW_AT_type DW_FORM_ref_udata (E) | |
18550 | ||
18551 | Besides being broken debug info, it can put GDB into an | |
18552 | infinite loop. Consider: | |
18553 | ||
18554 | When we're building the full name for Class<E>, we'll start | |
18555 | at Class, and go look over its template type parameters, | |
18556 | finding E. We'll then try to build the full name of E, and | |
18557 | reach here. We're now trying to build the full name of E, | |
18558 | and look over the parent DIE for containing scope. In the | |
18559 | broken case, if we followed the parent DIE of E, we'd again | |
18560 | find Class, and once again go look at its template type | |
18561 | arguments, etc., etc. Simply don't consider such parent die | |
18562 | as source-level parent of this die (it can't be, the language | |
18563 | doesn't allow it), and break the loop here. */ | |
18564 | name = dwarf2_name (die, cu); | |
18565 | parent_name = dwarf2_name (parent, cu); | |
18566 | complaint (&symfile_complaints, | |
18567 | _("template param type '%s' defined within parent '%s'"), | |
18568 | name ? name : "<unknown>", | |
18569 | parent_name ? parent_name : "<unknown>"); | |
18570 | return ""; | |
18571 | } | |
63d06c5c | 18572 | else |
0114d602 DJ |
18573 | switch (parent->tag) |
18574 | { | |
63d06c5c | 18575 | case DW_TAG_namespace: |
0114d602 | 18576 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
18577 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
18578 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
18579 | Work around this problem here. */ | |
18580 | if (cu->language == language_cplus | |
18581 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
18582 | return ""; | |
0114d602 DJ |
18583 | /* We give a name to even anonymous namespaces. */ |
18584 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 18585 | case DW_TAG_class_type: |
680b30c7 | 18586 | case DW_TAG_interface_type: |
63d06c5c | 18587 | case DW_TAG_structure_type: |
0114d602 | 18588 | case DW_TAG_union_type: |
f55ee35c | 18589 | case DW_TAG_module: |
0114d602 DJ |
18590 | parent_type = read_type_die (parent, cu); |
18591 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
18592 | return TYPE_TAG_NAME (parent_type); | |
18593 | else | |
18594 | /* An anonymous structure is only allowed non-static data | |
18595 | members; no typedefs, no member functions, et cetera. | |
18596 | So it does not need a prefix. */ | |
18597 | return ""; | |
abc72ce4 | 18598 | case DW_TAG_compile_unit: |
95554aad | 18599 | case DW_TAG_partial_unit: |
abc72ce4 DE |
18600 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
18601 | if (cu->language == language_cplus | |
8b70b953 | 18602 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
18603 | && die->child != NULL |
18604 | && (die->tag == DW_TAG_class_type | |
18605 | || die->tag == DW_TAG_structure_type | |
18606 | || die->tag == DW_TAG_union_type)) | |
18607 | { | |
18608 | char *name = guess_full_die_structure_name (die, cu); | |
18609 | if (name != NULL) | |
18610 | return name; | |
18611 | } | |
18612 | return ""; | |
3d567982 TT |
18613 | case DW_TAG_enumeration_type: |
18614 | parent_type = read_type_die (parent, cu); | |
18615 | if (TYPE_DECLARED_CLASS (parent_type)) | |
18616 | { | |
18617 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
18618 | return TYPE_TAG_NAME (parent_type); | |
18619 | return ""; | |
18620 | } | |
18621 | /* Fall through. */ | |
63d06c5c | 18622 | default: |
8176b9b8 | 18623 | return determine_prefix (parent, cu); |
63d06c5c | 18624 | } |
63d06c5c DC |
18625 | } |
18626 | ||
3e43a32a MS |
18627 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
18628 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
18629 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
18630 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
18631 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 18632 | |
f55ee35c | 18633 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
18634 | |
18635 | static char * | |
f55ee35c JK |
18636 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
18637 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 18638 | { |
f55ee35c | 18639 | const char *lead = ""; |
5c315b68 | 18640 | const char *sep; |
63d06c5c | 18641 | |
3e43a32a MS |
18642 | if (suffix == NULL || suffix[0] == '\0' |
18643 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
18644 | sep = ""; |
18645 | else if (cu->language == language_java) | |
18646 | sep = "."; | |
f55ee35c JK |
18647 | else if (cu->language == language_fortran && physname) |
18648 | { | |
18649 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
18650 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
18651 | ||
18652 | lead = "__"; | |
18653 | sep = "_MOD_"; | |
18654 | } | |
987504bb JJ |
18655 | else |
18656 | sep = "::"; | |
63d06c5c | 18657 | |
6dd47d34 DE |
18658 | if (prefix == NULL) |
18659 | prefix = ""; | |
18660 | if (suffix == NULL) | |
18661 | suffix = ""; | |
18662 | ||
987504bb JJ |
18663 | if (obs == NULL) |
18664 | { | |
3e43a32a MS |
18665 | char *retval |
18666 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 18667 | |
f55ee35c JK |
18668 | strcpy (retval, lead); |
18669 | strcat (retval, prefix); | |
6dd47d34 DE |
18670 | strcat (retval, sep); |
18671 | strcat (retval, suffix); | |
63d06c5c DC |
18672 | return retval; |
18673 | } | |
987504bb JJ |
18674 | else |
18675 | { | |
18676 | /* We have an obstack. */ | |
f55ee35c | 18677 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 18678 | } |
63d06c5c DC |
18679 | } |
18680 | ||
c906108c SS |
18681 | /* Return sibling of die, NULL if no sibling. */ |
18682 | ||
f9aca02d | 18683 | static struct die_info * |
fba45db2 | 18684 | sibling_die (struct die_info *die) |
c906108c | 18685 | { |
639d11d3 | 18686 | return die->sibling; |
c906108c SS |
18687 | } |
18688 | ||
71c25dea TT |
18689 | /* Get name of a die, return NULL if not found. */ |
18690 | ||
15d034d0 TT |
18691 | static const char * |
18692 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
18693 | struct obstack *obstack) |
18694 | { | |
18695 | if (name && cu->language == language_cplus) | |
18696 | { | |
18697 | char *canon_name = cp_canonicalize_string (name); | |
18698 | ||
18699 | if (canon_name != NULL) | |
18700 | { | |
18701 | if (strcmp (canon_name, name) != 0) | |
10f0c4bb | 18702 | name = obstack_copy0 (obstack, canon_name, strlen (canon_name)); |
71c25dea TT |
18703 | xfree (canon_name); |
18704 | } | |
18705 | } | |
18706 | ||
18707 | return name; | |
c906108c SS |
18708 | } |
18709 | ||
9219021c DC |
18710 | /* Get name of a die, return NULL if not found. */ |
18711 | ||
15d034d0 | 18712 | static const char * |
e142c38c | 18713 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
18714 | { |
18715 | struct attribute *attr; | |
18716 | ||
e142c38c | 18717 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
18718 | if ((!attr || !DW_STRING (attr)) |
18719 | && die->tag != DW_TAG_class_type | |
18720 | && die->tag != DW_TAG_interface_type | |
18721 | && die->tag != DW_TAG_structure_type | |
18722 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
18723 | return NULL; |
18724 | ||
18725 | switch (die->tag) | |
18726 | { | |
18727 | case DW_TAG_compile_unit: | |
95554aad | 18728 | case DW_TAG_partial_unit: |
71c25dea TT |
18729 | /* Compilation units have a DW_AT_name that is a filename, not |
18730 | a source language identifier. */ | |
18731 | case DW_TAG_enumeration_type: | |
18732 | case DW_TAG_enumerator: | |
18733 | /* These tags always have simple identifiers already; no need | |
18734 | to canonicalize them. */ | |
18735 | return DW_STRING (attr); | |
907af001 | 18736 | |
418835cc KS |
18737 | case DW_TAG_subprogram: |
18738 | /* Java constructors will all be named "<init>", so return | |
18739 | the class name when we see this special case. */ | |
18740 | if (cu->language == language_java | |
18741 | && DW_STRING (attr) != NULL | |
18742 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
18743 | { | |
18744 | struct dwarf2_cu *spec_cu = cu; | |
18745 | struct die_info *spec_die; | |
18746 | ||
18747 | /* GCJ will output '<init>' for Java constructor names. | |
18748 | For this special case, return the name of the parent class. */ | |
18749 | ||
18750 | /* GCJ may output suprogram DIEs with AT_specification set. | |
18751 | If so, use the name of the specified DIE. */ | |
18752 | spec_die = die_specification (die, &spec_cu); | |
18753 | if (spec_die != NULL) | |
18754 | return dwarf2_name (spec_die, spec_cu); | |
18755 | ||
18756 | do | |
18757 | { | |
18758 | die = die->parent; | |
18759 | if (die->tag == DW_TAG_class_type) | |
18760 | return dwarf2_name (die, cu); | |
18761 | } | |
95554aad TT |
18762 | while (die->tag != DW_TAG_compile_unit |
18763 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 18764 | } |
907af001 UW |
18765 | break; |
18766 | ||
18767 | case DW_TAG_class_type: | |
18768 | case DW_TAG_interface_type: | |
18769 | case DW_TAG_structure_type: | |
18770 | case DW_TAG_union_type: | |
18771 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
18772 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
18773 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
18774 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
18775 | if (attr && DW_STRING (attr) |
18776 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
18777 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 18778 | return NULL; |
53832f31 TT |
18779 | |
18780 | /* GCC might emit a nameless typedef that has a linkage name. See | |
18781 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
18782 | if (!attr || DW_STRING (attr) == NULL) | |
18783 | { | |
df5c6c50 | 18784 | char *demangled = NULL; |
53832f31 TT |
18785 | |
18786 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
18787 | if (attr == NULL) | |
18788 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
18789 | ||
18790 | if (attr == NULL || DW_STRING (attr) == NULL) | |
18791 | return NULL; | |
18792 | ||
df5c6c50 JK |
18793 | /* Avoid demangling DW_STRING (attr) the second time on a second |
18794 | call for the same DIE. */ | |
18795 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 18796 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
18797 | |
18798 | if (demangled) | |
18799 | { | |
96408a79 SA |
18800 | char *base; |
18801 | ||
53832f31 | 18802 | /* FIXME: we already did this for the partial symbol... */ |
10f0c4bb TT |
18803 | DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack, |
18804 | demangled, strlen (demangled)); | |
53832f31 TT |
18805 | DW_STRING_IS_CANONICAL (attr) = 1; |
18806 | xfree (demangled); | |
96408a79 SA |
18807 | |
18808 | /* Strip any leading namespaces/classes, keep only the base name. | |
18809 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
18810 | base = strrchr (DW_STRING (attr), ':'); | |
18811 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
18812 | return &base[1]; | |
18813 | else | |
18814 | return DW_STRING (attr); | |
53832f31 TT |
18815 | } |
18816 | } | |
907af001 UW |
18817 | break; |
18818 | ||
71c25dea | 18819 | default: |
907af001 UW |
18820 | break; |
18821 | } | |
18822 | ||
18823 | if (!DW_STRING_IS_CANONICAL (attr)) | |
18824 | { | |
18825 | DW_STRING (attr) | |
18826 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
18827 | &cu->objfile->objfile_obstack); | |
18828 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 18829 | } |
907af001 | 18830 | return DW_STRING (attr); |
9219021c DC |
18831 | } |
18832 | ||
18833 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
18834 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
18835 | containing the return value on output. */ | |
9219021c DC |
18836 | |
18837 | static struct die_info * | |
f2f0e013 | 18838 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
18839 | { |
18840 | struct attribute *attr; | |
9219021c | 18841 | |
f2f0e013 | 18842 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
18843 | if (attr == NULL) |
18844 | return NULL; | |
18845 | ||
f2f0e013 | 18846 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
18847 | } |
18848 | ||
c906108c SS |
18849 | /* Convert a DIE tag into its string name. */ |
18850 | ||
f39c6ffd | 18851 | static const char * |
aa1ee363 | 18852 | dwarf_tag_name (unsigned tag) |
c906108c | 18853 | { |
f39c6ffd TT |
18854 | const char *name = get_DW_TAG_name (tag); |
18855 | ||
18856 | if (name == NULL) | |
18857 | return "DW_TAG_<unknown>"; | |
18858 | ||
18859 | return name; | |
c906108c SS |
18860 | } |
18861 | ||
18862 | /* Convert a DWARF attribute code into its string name. */ | |
18863 | ||
f39c6ffd | 18864 | static const char * |
aa1ee363 | 18865 | dwarf_attr_name (unsigned attr) |
c906108c | 18866 | { |
f39c6ffd TT |
18867 | const char *name; |
18868 | ||
c764a876 | 18869 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
18870 | if (attr == DW_AT_MIPS_fde) |
18871 | return "DW_AT_MIPS_fde"; | |
18872 | #else | |
18873 | if (attr == DW_AT_HP_block_index) | |
18874 | return "DW_AT_HP_block_index"; | |
c764a876 | 18875 | #endif |
f39c6ffd TT |
18876 | |
18877 | name = get_DW_AT_name (attr); | |
18878 | ||
18879 | if (name == NULL) | |
18880 | return "DW_AT_<unknown>"; | |
18881 | ||
18882 | return name; | |
c906108c SS |
18883 | } |
18884 | ||
18885 | /* Convert a DWARF value form code into its string name. */ | |
18886 | ||
f39c6ffd | 18887 | static const char * |
aa1ee363 | 18888 | dwarf_form_name (unsigned form) |
c906108c | 18889 | { |
f39c6ffd TT |
18890 | const char *name = get_DW_FORM_name (form); |
18891 | ||
18892 | if (name == NULL) | |
18893 | return "DW_FORM_<unknown>"; | |
18894 | ||
18895 | return name; | |
c906108c SS |
18896 | } |
18897 | ||
18898 | static char * | |
fba45db2 | 18899 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
18900 | { |
18901 | if (mybool) | |
18902 | return "TRUE"; | |
18903 | else | |
18904 | return "FALSE"; | |
18905 | } | |
18906 | ||
18907 | /* Convert a DWARF type code into its string name. */ | |
18908 | ||
f39c6ffd | 18909 | static const char * |
aa1ee363 | 18910 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 18911 | { |
f39c6ffd | 18912 | const char *name = get_DW_ATE_name (enc); |
c906108c | 18913 | |
f39c6ffd TT |
18914 | if (name == NULL) |
18915 | return "DW_ATE_<unknown>"; | |
c906108c | 18916 | |
f39c6ffd | 18917 | return name; |
c906108c | 18918 | } |
c906108c | 18919 | |
f9aca02d | 18920 | static void |
d97bc12b | 18921 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
18922 | { |
18923 | unsigned int i; | |
18924 | ||
d97bc12b DE |
18925 | print_spaces (indent, f); |
18926 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 18927 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
18928 | |
18929 | if (die->parent != NULL) | |
18930 | { | |
18931 | print_spaces (indent, f); | |
18932 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 18933 | die->parent->offset.sect_off); |
d97bc12b DE |
18934 | } |
18935 | ||
18936 | print_spaces (indent, f); | |
18937 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 18938 | dwarf_bool_name (die->child != NULL)); |
c906108c | 18939 | |
d97bc12b DE |
18940 | print_spaces (indent, f); |
18941 | fprintf_unfiltered (f, " attributes:\n"); | |
18942 | ||
c906108c SS |
18943 | for (i = 0; i < die->num_attrs; ++i) |
18944 | { | |
d97bc12b DE |
18945 | print_spaces (indent, f); |
18946 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
18947 | dwarf_attr_name (die->attrs[i].name), |
18948 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 18949 | |
c906108c SS |
18950 | switch (die->attrs[i].form) |
18951 | { | |
c906108c | 18952 | case DW_FORM_addr: |
3019eac3 | 18953 | case DW_FORM_GNU_addr_index: |
d97bc12b | 18954 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 18955 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
18956 | break; |
18957 | case DW_FORM_block2: | |
18958 | case DW_FORM_block4: | |
18959 | case DW_FORM_block: | |
18960 | case DW_FORM_block1: | |
56eb65bd SP |
18961 | fprintf_unfiltered (f, "block: size %s", |
18962 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 18963 | break; |
2dc7f7b3 | 18964 | case DW_FORM_exprloc: |
56eb65bd SP |
18965 | fprintf_unfiltered (f, "expression: size %s", |
18966 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 18967 | break; |
4568ecf9 DE |
18968 | case DW_FORM_ref_addr: |
18969 | fprintf_unfiltered (f, "ref address: "); | |
18970 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
18971 | break; | |
36586728 TT |
18972 | case DW_FORM_GNU_ref_alt: |
18973 | fprintf_unfiltered (f, "alt ref address: "); | |
18974 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
18975 | break; | |
10b3939b DJ |
18976 | case DW_FORM_ref1: |
18977 | case DW_FORM_ref2: | |
18978 | case DW_FORM_ref4: | |
4568ecf9 DE |
18979 | case DW_FORM_ref8: |
18980 | case DW_FORM_ref_udata: | |
d97bc12b | 18981 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 18982 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 18983 | break; |
c906108c SS |
18984 | case DW_FORM_data1: |
18985 | case DW_FORM_data2: | |
18986 | case DW_FORM_data4: | |
ce5d95e1 | 18987 | case DW_FORM_data8: |
c906108c SS |
18988 | case DW_FORM_udata: |
18989 | case DW_FORM_sdata: | |
43bbcdc2 PH |
18990 | fprintf_unfiltered (f, "constant: %s", |
18991 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 18992 | break; |
2dc7f7b3 TT |
18993 | case DW_FORM_sec_offset: |
18994 | fprintf_unfiltered (f, "section offset: %s", | |
18995 | pulongest (DW_UNSND (&die->attrs[i]))); | |
18996 | break; | |
55f1336d | 18997 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
18998 | fprintf_unfiltered (f, "signature: %s", |
18999 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 19000 | break; |
c906108c | 19001 | case DW_FORM_string: |
4bdf3d34 | 19002 | case DW_FORM_strp: |
3019eac3 | 19003 | case DW_FORM_GNU_str_index: |
36586728 | 19004 | case DW_FORM_GNU_strp_alt: |
8285870a | 19005 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 19006 | DW_STRING (&die->attrs[i]) |
8285870a JK |
19007 | ? DW_STRING (&die->attrs[i]) : "", |
19008 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
19009 | break; |
19010 | case DW_FORM_flag: | |
19011 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 19012 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 19013 | else |
d97bc12b | 19014 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 19015 | break; |
2dc7f7b3 TT |
19016 | case DW_FORM_flag_present: |
19017 | fprintf_unfiltered (f, "flag: TRUE"); | |
19018 | break; | |
a8329558 | 19019 | case DW_FORM_indirect: |
0963b4bd MS |
19020 | /* The reader will have reduced the indirect form to |
19021 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
19022 | fprintf_unfiltered (f, |
19023 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 19024 | break; |
c906108c | 19025 | default: |
d97bc12b | 19026 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 19027 | die->attrs[i].form); |
d97bc12b | 19028 | break; |
c906108c | 19029 | } |
d97bc12b | 19030 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
19031 | } |
19032 | } | |
19033 | ||
f9aca02d | 19034 | static void |
d97bc12b | 19035 | dump_die_for_error (struct die_info *die) |
c906108c | 19036 | { |
d97bc12b DE |
19037 | dump_die_shallow (gdb_stderr, 0, die); |
19038 | } | |
19039 | ||
19040 | static void | |
19041 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
19042 | { | |
19043 | int indent = level * 4; | |
19044 | ||
19045 | gdb_assert (die != NULL); | |
19046 | ||
19047 | if (level >= max_level) | |
19048 | return; | |
19049 | ||
19050 | dump_die_shallow (f, indent, die); | |
19051 | ||
19052 | if (die->child != NULL) | |
c906108c | 19053 | { |
d97bc12b DE |
19054 | print_spaces (indent, f); |
19055 | fprintf_unfiltered (f, " Children:"); | |
19056 | if (level + 1 < max_level) | |
19057 | { | |
19058 | fprintf_unfiltered (f, "\n"); | |
19059 | dump_die_1 (f, level + 1, max_level, die->child); | |
19060 | } | |
19061 | else | |
19062 | { | |
3e43a32a MS |
19063 | fprintf_unfiltered (f, |
19064 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
19065 | } |
19066 | } | |
19067 | ||
19068 | if (die->sibling != NULL && level > 0) | |
19069 | { | |
19070 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
19071 | } |
19072 | } | |
19073 | ||
d97bc12b DE |
19074 | /* This is called from the pdie macro in gdbinit.in. |
19075 | It's not static so gcc will keep a copy callable from gdb. */ | |
19076 | ||
19077 | void | |
19078 | dump_die (struct die_info *die, int max_level) | |
19079 | { | |
19080 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
19081 | } | |
19082 | ||
f9aca02d | 19083 | static void |
51545339 | 19084 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19085 | { |
51545339 | 19086 | void **slot; |
c906108c | 19087 | |
b64f50a1 JK |
19088 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
19089 | INSERT); | |
51545339 DJ |
19090 | |
19091 | *slot = die; | |
c906108c SS |
19092 | } |
19093 | ||
b64f50a1 JK |
19094 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
19095 | required kind. */ | |
19096 | ||
19097 | static sect_offset | |
ff39bb5e | 19098 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 19099 | { |
4568ecf9 | 19100 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 19101 | |
7771576e | 19102 | if (attr_form_is_ref (attr)) |
b64f50a1 | 19103 | return retval; |
93311388 | 19104 | |
b64f50a1 | 19105 | retval.sect_off = 0; |
93311388 DE |
19106 | complaint (&symfile_complaints, |
19107 | _("unsupported die ref attribute form: '%s'"), | |
19108 | dwarf_form_name (attr->form)); | |
b64f50a1 | 19109 | return retval; |
c906108c SS |
19110 | } |
19111 | ||
43bbcdc2 PH |
19112 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
19113 | * the value held by the attribute is not constant. */ | |
a02abb62 | 19114 | |
43bbcdc2 | 19115 | static LONGEST |
ff39bb5e | 19116 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
19117 | { |
19118 | if (attr->form == DW_FORM_sdata) | |
19119 | return DW_SND (attr); | |
19120 | else if (attr->form == DW_FORM_udata | |
19121 | || attr->form == DW_FORM_data1 | |
19122 | || attr->form == DW_FORM_data2 | |
19123 | || attr->form == DW_FORM_data4 | |
19124 | || attr->form == DW_FORM_data8) | |
19125 | return DW_UNSND (attr); | |
19126 | else | |
19127 | { | |
3e43a32a MS |
19128 | complaint (&symfile_complaints, |
19129 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
19130 | dwarf_form_name (attr->form)); |
19131 | return default_value; | |
19132 | } | |
19133 | } | |
19134 | ||
348e048f DE |
19135 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
19136 | On entry *REF_CU is the CU of SRC_DIE. | |
19137 | On exit *REF_CU is the CU of the result. */ | |
19138 | ||
19139 | static struct die_info * | |
ff39bb5e | 19140 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
19141 | struct dwarf2_cu **ref_cu) |
19142 | { | |
19143 | struct die_info *die; | |
19144 | ||
7771576e | 19145 | if (attr_form_is_ref (attr)) |
348e048f | 19146 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 19147 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
19148 | die = follow_die_sig (src_die, attr, ref_cu); |
19149 | else | |
19150 | { | |
19151 | dump_die_for_error (src_die); | |
19152 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 19153 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
19154 | } |
19155 | ||
19156 | return die; | |
03dd20cc DJ |
19157 | } |
19158 | ||
5c631832 | 19159 | /* Follow reference OFFSET. |
673bfd45 DE |
19160 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
19161 | On exit *REF_CU is the CU of the result. | |
19162 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 19163 | |
f9aca02d | 19164 | static struct die_info * |
36586728 TT |
19165 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
19166 | struct dwarf2_cu **ref_cu) | |
c906108c | 19167 | { |
10b3939b | 19168 | struct die_info temp_die; |
f2f0e013 | 19169 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 19170 | |
348e048f DE |
19171 | gdb_assert (cu->per_cu != NULL); |
19172 | ||
98bfdba5 PA |
19173 | target_cu = cu; |
19174 | ||
3019eac3 | 19175 | if (cu->per_cu->is_debug_types) |
348e048f DE |
19176 | { |
19177 | /* .debug_types CUs cannot reference anything outside their CU. | |
19178 | If they need to, they have to reference a signatured type via | |
55f1336d | 19179 | DW_FORM_ref_sig8. */ |
348e048f | 19180 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 19181 | return NULL; |
348e048f | 19182 | } |
36586728 TT |
19183 | else if (offset_in_dwz != cu->per_cu->is_dwz |
19184 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
19185 | { |
19186 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 19187 | |
36586728 TT |
19188 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
19189 | cu->objfile); | |
03dd20cc DJ |
19190 | |
19191 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
19192 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
19193 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 19194 | |
10b3939b DJ |
19195 | target_cu = per_cu->cu; |
19196 | } | |
98bfdba5 PA |
19197 | else if (cu->dies == NULL) |
19198 | { | |
19199 | /* We're loading full DIEs during partial symbol reading. */ | |
19200 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 19201 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 19202 | } |
c906108c | 19203 | |
f2f0e013 | 19204 | *ref_cu = target_cu; |
51545339 | 19205 | temp_die.offset = offset; |
b64f50a1 | 19206 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 19207 | } |
10b3939b | 19208 | |
5c631832 JK |
19209 | /* Follow reference attribute ATTR of SRC_DIE. |
19210 | On entry *REF_CU is the CU of SRC_DIE. | |
19211 | On exit *REF_CU is the CU of the result. */ | |
19212 | ||
19213 | static struct die_info * | |
ff39bb5e | 19214 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
19215 | struct dwarf2_cu **ref_cu) |
19216 | { | |
b64f50a1 | 19217 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
19218 | struct dwarf2_cu *cu = *ref_cu; |
19219 | struct die_info *die; | |
19220 | ||
36586728 TT |
19221 | die = follow_die_offset (offset, |
19222 | (attr->form == DW_FORM_GNU_ref_alt | |
19223 | || cu->per_cu->is_dwz), | |
19224 | ref_cu); | |
5c631832 JK |
19225 | if (!die) |
19226 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
19227 | "at 0x%x [in module %s]"), | |
4262abfb JK |
19228 | offset.sect_off, src_die->offset.sect_off, |
19229 | objfile_name (cu->objfile)); | |
348e048f | 19230 | |
5c631832 JK |
19231 | return die; |
19232 | } | |
19233 | ||
d83e736b JK |
19234 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
19235 | Returned value is intended for DW_OP_call*. Returned | |
19236 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
19237 | |
19238 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
19239 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
19240 | struct dwarf2_per_cu_data *per_cu, | |
19241 | CORE_ADDR (*get_frame_pc) (void *baton), | |
19242 | void *baton) | |
5c631832 | 19243 | { |
918dd910 | 19244 | struct dwarf2_cu *cu; |
5c631832 JK |
19245 | struct die_info *die; |
19246 | struct attribute *attr; | |
19247 | struct dwarf2_locexpr_baton retval; | |
19248 | ||
8cf6f0b1 TT |
19249 | dw2_setup (per_cu->objfile); |
19250 | ||
918dd910 JK |
19251 | if (per_cu->cu == NULL) |
19252 | load_cu (per_cu); | |
19253 | cu = per_cu->cu; | |
19254 | ||
36586728 | 19255 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
19256 | if (!die) |
19257 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 19258 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
19259 | |
19260 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
19261 | if (!attr) | |
19262 | { | |
e103e986 JK |
19263 | /* DWARF: "If there is no such attribute, then there is no effect.". |
19264 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 19265 | |
e103e986 | 19266 | retval.data = NULL; |
5c631832 JK |
19267 | retval.size = 0; |
19268 | } | |
8cf6f0b1 TT |
19269 | else if (attr_form_is_section_offset (attr)) |
19270 | { | |
19271 | struct dwarf2_loclist_baton loclist_baton; | |
19272 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
19273 | size_t size; | |
19274 | ||
19275 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
19276 | ||
19277 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
19278 | &size, pc); | |
19279 | retval.size = size; | |
19280 | } | |
5c631832 JK |
19281 | else |
19282 | { | |
19283 | if (!attr_form_is_block (attr)) | |
19284 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
19285 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 19286 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
19287 | |
19288 | retval.data = DW_BLOCK (attr)->data; | |
19289 | retval.size = DW_BLOCK (attr)->size; | |
19290 | } | |
19291 | retval.per_cu = cu->per_cu; | |
918dd910 | 19292 | |
918dd910 JK |
19293 | age_cached_comp_units (); |
19294 | ||
5c631832 | 19295 | return retval; |
348e048f DE |
19296 | } |
19297 | ||
8b9737bf TT |
19298 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
19299 | offset. */ | |
19300 | ||
19301 | struct dwarf2_locexpr_baton | |
19302 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
19303 | struct dwarf2_per_cu_data *per_cu, | |
19304 | CORE_ADDR (*get_frame_pc) (void *baton), | |
19305 | void *baton) | |
19306 | { | |
19307 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
19308 | ||
19309 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
19310 | } | |
19311 | ||
b6807d98 TT |
19312 | /* Write a constant of a given type as target-ordered bytes into |
19313 | OBSTACK. */ | |
19314 | ||
19315 | static const gdb_byte * | |
19316 | write_constant_as_bytes (struct obstack *obstack, | |
19317 | enum bfd_endian byte_order, | |
19318 | struct type *type, | |
19319 | ULONGEST value, | |
19320 | LONGEST *len) | |
19321 | { | |
19322 | gdb_byte *result; | |
19323 | ||
19324 | *len = TYPE_LENGTH (type); | |
19325 | result = obstack_alloc (obstack, *len); | |
19326 | store_unsigned_integer (result, *len, byte_order, value); | |
19327 | ||
19328 | return result; | |
19329 | } | |
19330 | ||
19331 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
19332 | pointer to the constant bytes and set LEN to the length of the | |
19333 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
19334 | does not have a DW_AT_const_value, return NULL. */ | |
19335 | ||
19336 | const gdb_byte * | |
19337 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
19338 | struct dwarf2_per_cu_data *per_cu, | |
19339 | struct obstack *obstack, | |
19340 | LONGEST *len) | |
19341 | { | |
19342 | struct dwarf2_cu *cu; | |
19343 | struct die_info *die; | |
19344 | struct attribute *attr; | |
19345 | const gdb_byte *result = NULL; | |
19346 | struct type *type; | |
19347 | LONGEST value; | |
19348 | enum bfd_endian byte_order; | |
19349 | ||
19350 | dw2_setup (per_cu->objfile); | |
19351 | ||
19352 | if (per_cu->cu == NULL) | |
19353 | load_cu (per_cu); | |
19354 | cu = per_cu->cu; | |
19355 | ||
19356 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
19357 | if (!die) | |
19358 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 19359 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
19360 | |
19361 | ||
19362 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
19363 | if (attr == NULL) | |
19364 | return NULL; | |
19365 | ||
19366 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
19367 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
19368 | ||
19369 | switch (attr->form) | |
19370 | { | |
19371 | case DW_FORM_addr: | |
19372 | case DW_FORM_GNU_addr_index: | |
19373 | { | |
19374 | gdb_byte *tem; | |
19375 | ||
19376 | *len = cu->header.addr_size; | |
19377 | tem = obstack_alloc (obstack, *len); | |
19378 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); | |
19379 | result = tem; | |
19380 | } | |
19381 | break; | |
19382 | case DW_FORM_string: | |
19383 | case DW_FORM_strp: | |
19384 | case DW_FORM_GNU_str_index: | |
19385 | case DW_FORM_GNU_strp_alt: | |
19386 | /* DW_STRING is already allocated on the objfile obstack, point | |
19387 | directly to it. */ | |
19388 | result = (const gdb_byte *) DW_STRING (attr); | |
19389 | *len = strlen (DW_STRING (attr)); | |
19390 | break; | |
19391 | case DW_FORM_block1: | |
19392 | case DW_FORM_block2: | |
19393 | case DW_FORM_block4: | |
19394 | case DW_FORM_block: | |
19395 | case DW_FORM_exprloc: | |
19396 | result = DW_BLOCK (attr)->data; | |
19397 | *len = DW_BLOCK (attr)->size; | |
19398 | break; | |
19399 | ||
19400 | /* The DW_AT_const_value attributes are supposed to carry the | |
19401 | symbol's value "represented as it would be on the target | |
19402 | architecture." By the time we get here, it's already been | |
19403 | converted to host endianness, so we just need to sign- or | |
19404 | zero-extend it as appropriate. */ | |
19405 | case DW_FORM_data1: | |
19406 | type = die_type (die, cu); | |
19407 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
19408 | if (result == NULL) | |
19409 | result = write_constant_as_bytes (obstack, byte_order, | |
19410 | type, value, len); | |
19411 | break; | |
19412 | case DW_FORM_data2: | |
19413 | type = die_type (die, cu); | |
19414 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
19415 | if (result == NULL) | |
19416 | result = write_constant_as_bytes (obstack, byte_order, | |
19417 | type, value, len); | |
19418 | break; | |
19419 | case DW_FORM_data4: | |
19420 | type = die_type (die, cu); | |
19421 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
19422 | if (result == NULL) | |
19423 | result = write_constant_as_bytes (obstack, byte_order, | |
19424 | type, value, len); | |
19425 | break; | |
19426 | case DW_FORM_data8: | |
19427 | type = die_type (die, cu); | |
19428 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
19429 | if (result == NULL) | |
19430 | result = write_constant_as_bytes (obstack, byte_order, | |
19431 | type, value, len); | |
19432 | break; | |
19433 | ||
19434 | case DW_FORM_sdata: | |
19435 | type = die_type (die, cu); | |
19436 | result = write_constant_as_bytes (obstack, byte_order, | |
19437 | type, DW_SND (attr), len); | |
19438 | break; | |
19439 | ||
19440 | case DW_FORM_udata: | |
19441 | type = die_type (die, cu); | |
19442 | result = write_constant_as_bytes (obstack, byte_order, | |
19443 | type, DW_UNSND (attr), len); | |
19444 | break; | |
19445 | ||
19446 | default: | |
19447 | complaint (&symfile_complaints, | |
19448 | _("unsupported const value attribute form: '%s'"), | |
19449 | dwarf_form_name (attr->form)); | |
19450 | break; | |
19451 | } | |
19452 | ||
19453 | return result; | |
19454 | } | |
19455 | ||
8a9b8146 TT |
19456 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
19457 | PER_CU. */ | |
19458 | ||
19459 | struct type * | |
b64f50a1 | 19460 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
19461 | struct dwarf2_per_cu_data *per_cu) |
19462 | { | |
b64f50a1 JK |
19463 | sect_offset die_offset_sect; |
19464 | ||
8a9b8146 | 19465 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
19466 | |
19467 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
19468 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
19469 | } |
19470 | ||
ac9ec31b | 19471 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 19472 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
19473 | On exit *REF_CU is the CU of the result. |
19474 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
19475 | |
19476 | static struct die_info * | |
ac9ec31b DE |
19477 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
19478 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
19479 | { |
19480 | struct objfile *objfile = (*ref_cu)->objfile; | |
19481 | struct die_info temp_die; | |
348e048f DE |
19482 | struct dwarf2_cu *sig_cu; |
19483 | struct die_info *die; | |
19484 | ||
ac9ec31b DE |
19485 | /* While it might be nice to assert sig_type->type == NULL here, |
19486 | we can get here for DW_AT_imported_declaration where we need | |
19487 | the DIE not the type. */ | |
348e048f DE |
19488 | |
19489 | /* If necessary, add it to the queue and load its DIEs. */ | |
19490 | ||
95554aad | 19491 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 19492 | read_signatured_type (sig_type); |
348e048f | 19493 | |
348e048f | 19494 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 19495 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
19496 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
19497 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
19498 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
19499 | temp_die.offset.sect_off); | |
348e048f DE |
19500 | if (die) |
19501 | { | |
796a7ff8 DE |
19502 | /* For .gdb_index version 7 keep track of included TUs. |
19503 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
19504 | if (dwarf2_per_objfile->index_table != NULL | |
19505 | && dwarf2_per_objfile->index_table->version <= 7) | |
19506 | { | |
19507 | VEC_safe_push (dwarf2_per_cu_ptr, | |
19508 | (*ref_cu)->per_cu->imported_symtabs, | |
19509 | sig_cu->per_cu); | |
19510 | } | |
19511 | ||
348e048f DE |
19512 | *ref_cu = sig_cu; |
19513 | return die; | |
19514 | } | |
19515 | ||
ac9ec31b DE |
19516 | return NULL; |
19517 | } | |
19518 | ||
19519 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
19520 | On entry *REF_CU is the CU of SRC_DIE. | |
19521 | On exit *REF_CU is the CU of the result. | |
19522 | The result is the DIE of the type. | |
19523 | If the referenced type cannot be found an error is thrown. */ | |
19524 | ||
19525 | static struct die_info * | |
ff39bb5e | 19526 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
19527 | struct dwarf2_cu **ref_cu) |
19528 | { | |
19529 | ULONGEST signature = DW_SIGNATURE (attr); | |
19530 | struct signatured_type *sig_type; | |
19531 | struct die_info *die; | |
19532 | ||
19533 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
19534 | ||
a2ce51a0 | 19535 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
19536 | /* sig_type will be NULL if the signatured type is missing from |
19537 | the debug info. */ | |
19538 | if (sig_type == NULL) | |
19539 | { | |
19540 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
19541 | " from DIE at 0x%x [in module %s]"), | |
19542 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 19543 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
19544 | } |
19545 | ||
19546 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
19547 | if (die == NULL) | |
19548 | { | |
19549 | dump_die_for_error (src_die); | |
19550 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
19551 | " from DIE at 0x%x [in module %s]"), | |
19552 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 19553 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
19554 | } |
19555 | ||
19556 | return die; | |
19557 | } | |
19558 | ||
19559 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
19560 | reading in and processing the type unit if necessary. */ | |
19561 | ||
19562 | static struct type * | |
19563 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
19564 | struct dwarf2_cu *cu) | |
19565 | { | |
19566 | struct signatured_type *sig_type; | |
19567 | struct dwarf2_cu *type_cu; | |
19568 | struct die_info *type_die; | |
19569 | struct type *type; | |
19570 | ||
a2ce51a0 | 19571 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
19572 | /* sig_type will be NULL if the signatured type is missing from |
19573 | the debug info. */ | |
19574 | if (sig_type == NULL) | |
19575 | { | |
19576 | complaint (&symfile_complaints, | |
19577 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
19578 | " from DIE at 0x%x [in module %s]"), | |
19579 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19580 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19581 | return build_error_marker_type (cu, die); |
19582 | } | |
19583 | ||
19584 | /* If we already know the type we're done. */ | |
19585 | if (sig_type->type != NULL) | |
19586 | return sig_type->type; | |
19587 | ||
19588 | type_cu = cu; | |
19589 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
19590 | if (type_die != NULL) | |
19591 | { | |
19592 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
19593 | is created. This is important, for example, because for c++ classes | |
19594 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
19595 | type = read_type_die (type_die, type_cu); | |
19596 | if (type == NULL) | |
19597 | { | |
19598 | complaint (&symfile_complaints, | |
19599 | _("Dwarf Error: Cannot build signatured type %s" | |
19600 | " referenced from DIE at 0x%x [in module %s]"), | |
19601 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19602 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19603 | type = build_error_marker_type (cu, die); |
19604 | } | |
19605 | } | |
19606 | else | |
19607 | { | |
19608 | complaint (&symfile_complaints, | |
19609 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
19610 | " from DIE at 0x%x [in module %s]"), | |
19611 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 19612 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19613 | type = build_error_marker_type (cu, die); |
19614 | } | |
19615 | sig_type->type = type; | |
19616 | ||
19617 | return type; | |
19618 | } | |
19619 | ||
19620 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
19621 | reading in and processing the type unit if necessary. */ | |
19622 | ||
19623 | static struct type * | |
ff39bb5e | 19624 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 19625 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
19626 | { |
19627 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 19628 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19629 | { |
19630 | struct dwarf2_cu *type_cu = cu; | |
19631 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
19632 | ||
19633 | return read_type_die (type_die, type_cu); | |
19634 | } | |
19635 | else if (attr->form == DW_FORM_ref_sig8) | |
19636 | { | |
19637 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
19638 | } | |
19639 | else | |
19640 | { | |
19641 | complaint (&symfile_complaints, | |
19642 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
19643 | " at 0x%x [in module %s]"), | |
19644 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 19645 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
19646 | return build_error_marker_type (cu, die); |
19647 | } | |
348e048f DE |
19648 | } |
19649 | ||
e5fe5e75 | 19650 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
19651 | |
19652 | static void | |
e5fe5e75 | 19653 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 19654 | { |
52dc124a | 19655 | struct signatured_type *sig_type; |
348e048f | 19656 | |
f4dc4d17 DE |
19657 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
19658 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
19659 | ||
6721b2ec DE |
19660 | /* We have the per_cu, but we need the signatured_type. |
19661 | Fortunately this is an easy translation. */ | |
19662 | gdb_assert (per_cu->is_debug_types); | |
19663 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 19664 | |
6721b2ec | 19665 | gdb_assert (per_cu->cu == NULL); |
348e048f | 19666 | |
52dc124a | 19667 | read_signatured_type (sig_type); |
348e048f | 19668 | |
6721b2ec | 19669 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
19670 | } |
19671 | ||
dee91e82 DE |
19672 | /* die_reader_func for read_signatured_type. |
19673 | This is identical to load_full_comp_unit_reader, | |
19674 | but is kept separate for now. */ | |
348e048f DE |
19675 | |
19676 | static void | |
dee91e82 | 19677 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 19678 | const gdb_byte *info_ptr, |
dee91e82 DE |
19679 | struct die_info *comp_unit_die, |
19680 | int has_children, | |
19681 | void *data) | |
348e048f | 19682 | { |
dee91e82 | 19683 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 19684 | |
dee91e82 DE |
19685 | gdb_assert (cu->die_hash == NULL); |
19686 | cu->die_hash = | |
19687 | htab_create_alloc_ex (cu->header.length / 12, | |
19688 | die_hash, | |
19689 | die_eq, | |
19690 | NULL, | |
19691 | &cu->comp_unit_obstack, | |
19692 | hashtab_obstack_allocate, | |
19693 | dummy_obstack_deallocate); | |
348e048f | 19694 | |
dee91e82 DE |
19695 | if (has_children) |
19696 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
19697 | &info_ptr, comp_unit_die); | |
19698 | cu->dies = comp_unit_die; | |
19699 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
19700 | |
19701 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 19702 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 19703 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
19704 | or we won't be able to build types correctly. |
19705 | Similarly, if we do not read the producer, we can not apply | |
19706 | producer-specific interpretation. */ | |
95554aad | 19707 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 19708 | } |
348e048f | 19709 | |
3019eac3 DE |
19710 | /* Read in a signatured type and build its CU and DIEs. |
19711 | If the type is a stub for the real type in a DWO file, | |
19712 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
19713 | |
19714 | static void | |
19715 | read_signatured_type (struct signatured_type *sig_type) | |
19716 | { | |
19717 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 19718 | |
3019eac3 | 19719 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 19720 | gdb_assert (per_cu->cu == NULL); |
348e048f | 19721 | |
f4dc4d17 DE |
19722 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
19723 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 19724 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
19725 | } |
19726 | ||
c906108c SS |
19727 | /* Decode simple location descriptions. |
19728 | Given a pointer to a dwarf block that defines a location, compute | |
19729 | the location and return the value. | |
19730 | ||
4cecd739 DJ |
19731 | NOTE drow/2003-11-18: This function is called in two situations |
19732 | now: for the address of static or global variables (partial symbols | |
19733 | only) and for offsets into structures which are expected to be | |
19734 | (more or less) constant. The partial symbol case should go away, | |
19735 | and only the constant case should remain. That will let this | |
19736 | function complain more accurately. A few special modes are allowed | |
19737 | without complaint for global variables (for instance, global | |
19738 | register values and thread-local values). | |
c906108c SS |
19739 | |
19740 | A location description containing no operations indicates that the | |
4cecd739 | 19741 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
19742 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
19743 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
19744 | complaint. |
19745 | ||
19746 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
19747 | |
19748 | static CORE_ADDR | |
e7c27a73 | 19749 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 19750 | { |
e7c27a73 | 19751 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
19752 | size_t i; |
19753 | size_t size = blk->size; | |
d521ce57 | 19754 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
19755 | CORE_ADDR stack[64]; |
19756 | int stacki; | |
19757 | unsigned int bytes_read, unsnd; | |
19758 | gdb_byte op; | |
c906108c | 19759 | |
21ae7a4d JK |
19760 | i = 0; |
19761 | stacki = 0; | |
19762 | stack[stacki] = 0; | |
19763 | stack[++stacki] = 0; | |
19764 | ||
19765 | while (i < size) | |
19766 | { | |
19767 | op = data[i++]; | |
19768 | switch (op) | |
19769 | { | |
19770 | case DW_OP_lit0: | |
19771 | case DW_OP_lit1: | |
19772 | case DW_OP_lit2: | |
19773 | case DW_OP_lit3: | |
19774 | case DW_OP_lit4: | |
19775 | case DW_OP_lit5: | |
19776 | case DW_OP_lit6: | |
19777 | case DW_OP_lit7: | |
19778 | case DW_OP_lit8: | |
19779 | case DW_OP_lit9: | |
19780 | case DW_OP_lit10: | |
19781 | case DW_OP_lit11: | |
19782 | case DW_OP_lit12: | |
19783 | case DW_OP_lit13: | |
19784 | case DW_OP_lit14: | |
19785 | case DW_OP_lit15: | |
19786 | case DW_OP_lit16: | |
19787 | case DW_OP_lit17: | |
19788 | case DW_OP_lit18: | |
19789 | case DW_OP_lit19: | |
19790 | case DW_OP_lit20: | |
19791 | case DW_OP_lit21: | |
19792 | case DW_OP_lit22: | |
19793 | case DW_OP_lit23: | |
19794 | case DW_OP_lit24: | |
19795 | case DW_OP_lit25: | |
19796 | case DW_OP_lit26: | |
19797 | case DW_OP_lit27: | |
19798 | case DW_OP_lit28: | |
19799 | case DW_OP_lit29: | |
19800 | case DW_OP_lit30: | |
19801 | case DW_OP_lit31: | |
19802 | stack[++stacki] = op - DW_OP_lit0; | |
19803 | break; | |
f1bea926 | 19804 | |
21ae7a4d JK |
19805 | case DW_OP_reg0: |
19806 | case DW_OP_reg1: | |
19807 | case DW_OP_reg2: | |
19808 | case DW_OP_reg3: | |
19809 | case DW_OP_reg4: | |
19810 | case DW_OP_reg5: | |
19811 | case DW_OP_reg6: | |
19812 | case DW_OP_reg7: | |
19813 | case DW_OP_reg8: | |
19814 | case DW_OP_reg9: | |
19815 | case DW_OP_reg10: | |
19816 | case DW_OP_reg11: | |
19817 | case DW_OP_reg12: | |
19818 | case DW_OP_reg13: | |
19819 | case DW_OP_reg14: | |
19820 | case DW_OP_reg15: | |
19821 | case DW_OP_reg16: | |
19822 | case DW_OP_reg17: | |
19823 | case DW_OP_reg18: | |
19824 | case DW_OP_reg19: | |
19825 | case DW_OP_reg20: | |
19826 | case DW_OP_reg21: | |
19827 | case DW_OP_reg22: | |
19828 | case DW_OP_reg23: | |
19829 | case DW_OP_reg24: | |
19830 | case DW_OP_reg25: | |
19831 | case DW_OP_reg26: | |
19832 | case DW_OP_reg27: | |
19833 | case DW_OP_reg28: | |
19834 | case DW_OP_reg29: | |
19835 | case DW_OP_reg30: | |
19836 | case DW_OP_reg31: | |
19837 | stack[++stacki] = op - DW_OP_reg0; | |
19838 | if (i < size) | |
19839 | dwarf2_complex_location_expr_complaint (); | |
19840 | break; | |
c906108c | 19841 | |
21ae7a4d JK |
19842 | case DW_OP_regx: |
19843 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
19844 | i += bytes_read; | |
19845 | stack[++stacki] = unsnd; | |
19846 | if (i < size) | |
19847 | dwarf2_complex_location_expr_complaint (); | |
19848 | break; | |
c906108c | 19849 | |
21ae7a4d JK |
19850 | case DW_OP_addr: |
19851 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
19852 | cu, &bytes_read); | |
19853 | i += bytes_read; | |
19854 | break; | |
d53d4ac5 | 19855 | |
21ae7a4d JK |
19856 | case DW_OP_const1u: |
19857 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
19858 | i += 1; | |
19859 | break; | |
19860 | ||
19861 | case DW_OP_const1s: | |
19862 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
19863 | i += 1; | |
19864 | break; | |
19865 | ||
19866 | case DW_OP_const2u: | |
19867 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
19868 | i += 2; | |
19869 | break; | |
19870 | ||
19871 | case DW_OP_const2s: | |
19872 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
19873 | i += 2; | |
19874 | break; | |
d53d4ac5 | 19875 | |
21ae7a4d JK |
19876 | case DW_OP_const4u: |
19877 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
19878 | i += 4; | |
19879 | break; | |
19880 | ||
19881 | case DW_OP_const4s: | |
19882 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
19883 | i += 4; | |
19884 | break; | |
19885 | ||
585861ea JK |
19886 | case DW_OP_const8u: |
19887 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
19888 | i += 8; | |
19889 | break; | |
19890 | ||
21ae7a4d JK |
19891 | case DW_OP_constu: |
19892 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
19893 | &bytes_read); | |
19894 | i += bytes_read; | |
19895 | break; | |
19896 | ||
19897 | case DW_OP_consts: | |
19898 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
19899 | i += bytes_read; | |
19900 | break; | |
19901 | ||
19902 | case DW_OP_dup: | |
19903 | stack[stacki + 1] = stack[stacki]; | |
19904 | stacki++; | |
19905 | break; | |
19906 | ||
19907 | case DW_OP_plus: | |
19908 | stack[stacki - 1] += stack[stacki]; | |
19909 | stacki--; | |
19910 | break; | |
19911 | ||
19912 | case DW_OP_plus_uconst: | |
19913 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
19914 | &bytes_read); | |
19915 | i += bytes_read; | |
19916 | break; | |
19917 | ||
19918 | case DW_OP_minus: | |
19919 | stack[stacki - 1] -= stack[stacki]; | |
19920 | stacki--; | |
19921 | break; | |
19922 | ||
19923 | case DW_OP_deref: | |
19924 | /* If we're not the last op, then we definitely can't encode | |
19925 | this using GDB's address_class enum. This is valid for partial | |
19926 | global symbols, although the variable's address will be bogus | |
19927 | in the psymtab. */ | |
19928 | if (i < size) | |
19929 | dwarf2_complex_location_expr_complaint (); | |
19930 | break; | |
19931 | ||
19932 | case DW_OP_GNU_push_tls_address: | |
19933 | /* The top of the stack has the offset from the beginning | |
19934 | of the thread control block at which the variable is located. */ | |
19935 | /* Nothing should follow this operator, so the top of stack would | |
19936 | be returned. */ | |
19937 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
19938 | address will be bogus in the psymtab. Make it always at least |
19939 | non-zero to not look as a variable garbage collected by linker | |
19940 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
19941 | if (i < size) |
19942 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 19943 | stack[stacki]++; |
21ae7a4d JK |
19944 | break; |
19945 | ||
19946 | case DW_OP_GNU_uninit: | |
19947 | break; | |
19948 | ||
3019eac3 | 19949 | case DW_OP_GNU_addr_index: |
49f6c839 | 19950 | case DW_OP_GNU_const_index: |
3019eac3 DE |
19951 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
19952 | &bytes_read); | |
19953 | i += bytes_read; | |
19954 | break; | |
19955 | ||
21ae7a4d JK |
19956 | default: |
19957 | { | |
f39c6ffd | 19958 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
19959 | |
19960 | if (name) | |
19961 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
19962 | name); | |
19963 | else | |
19964 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
19965 | op); | |
19966 | } | |
19967 | ||
19968 | return (stack[stacki]); | |
d53d4ac5 | 19969 | } |
3c6e0cb3 | 19970 | |
21ae7a4d JK |
19971 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
19972 | outside of the allocated space. Also enforce minimum>0. */ | |
19973 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
19974 | { | |
19975 | complaint (&symfile_complaints, | |
19976 | _("location description stack overflow")); | |
19977 | return 0; | |
19978 | } | |
19979 | ||
19980 | if (stacki <= 0) | |
19981 | { | |
19982 | complaint (&symfile_complaints, | |
19983 | _("location description stack underflow")); | |
19984 | return 0; | |
19985 | } | |
19986 | } | |
19987 | return (stack[stacki]); | |
c906108c SS |
19988 | } |
19989 | ||
19990 | /* memory allocation interface */ | |
19991 | ||
c906108c | 19992 | static struct dwarf_block * |
7b5a2f43 | 19993 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
19994 | { |
19995 | struct dwarf_block *blk; | |
19996 | ||
19997 | blk = (struct dwarf_block *) | |
7b5a2f43 | 19998 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
19999 | return (blk); |
20000 | } | |
20001 | ||
c906108c | 20002 | static struct die_info * |
b60c80d6 | 20003 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
20004 | { |
20005 | struct die_info *die; | |
b60c80d6 DJ |
20006 | size_t size = sizeof (struct die_info); |
20007 | ||
20008 | if (num_attrs > 1) | |
20009 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 20010 | |
b60c80d6 | 20011 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
20012 | memset (die, 0, sizeof (struct die_info)); |
20013 | return (die); | |
20014 | } | |
2e276125 JB |
20015 | |
20016 | \f | |
20017 | /* Macro support. */ | |
20018 | ||
233d95b5 JK |
20019 | /* Return file name relative to the compilation directory of file number I in |
20020 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 20021 | responsible for freeing it. */ |
233d95b5 | 20022 | |
2e276125 | 20023 | static char * |
233d95b5 | 20024 | file_file_name (int file, struct line_header *lh) |
2e276125 | 20025 | { |
6a83a1e6 EZ |
20026 | /* Is the file number a valid index into the line header's file name |
20027 | table? Remember that file numbers start with one, not zero. */ | |
20028 | if (1 <= file && file <= lh->num_file_names) | |
20029 | { | |
20030 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 20031 | |
233d95b5 | 20032 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0) |
6a83a1e6 | 20033 | return xstrdup (fe->name); |
233d95b5 JK |
20034 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
20035 | fe->name, NULL); | |
6a83a1e6 | 20036 | } |
2e276125 JB |
20037 | else |
20038 | { | |
6a83a1e6 EZ |
20039 | /* The compiler produced a bogus file number. We can at least |
20040 | record the macro definitions made in the file, even if we | |
20041 | won't be able to find the file by name. */ | |
20042 | char fake_name[80]; | |
9a619af0 | 20043 | |
8c042590 PM |
20044 | xsnprintf (fake_name, sizeof (fake_name), |
20045 | "<bad macro file number %d>", file); | |
2e276125 | 20046 | |
6e70227d | 20047 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
20048 | _("bad file number in macro information (%d)"), |
20049 | file); | |
2e276125 | 20050 | |
6a83a1e6 | 20051 | return xstrdup (fake_name); |
2e276125 JB |
20052 | } |
20053 | } | |
20054 | ||
233d95b5 JK |
20055 | /* Return the full name of file number I in *LH's file name table. |
20056 | Use COMP_DIR as the name of the current directory of the | |
20057 | compilation. The result is allocated using xmalloc; the caller is | |
20058 | responsible for freeing it. */ | |
20059 | static char * | |
20060 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
20061 | { | |
20062 | /* Is the file number a valid index into the line header's file name | |
20063 | table? Remember that file numbers start with one, not zero. */ | |
20064 | if (1 <= file && file <= lh->num_file_names) | |
20065 | { | |
20066 | char *relative = file_file_name (file, lh); | |
20067 | ||
20068 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
20069 | return relative; | |
20070 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
20071 | } | |
20072 | else | |
20073 | return file_file_name (file, lh); | |
20074 | } | |
20075 | ||
2e276125 JB |
20076 | |
20077 | static struct macro_source_file * | |
20078 | macro_start_file (int file, int line, | |
20079 | struct macro_source_file *current_file, | |
20080 | const char *comp_dir, | |
20081 | struct line_header *lh, struct objfile *objfile) | |
20082 | { | |
233d95b5 JK |
20083 | /* File name relative to the compilation directory of this source file. */ |
20084 | char *file_name = file_file_name (file, lh); | |
2e276125 | 20085 | |
2e276125 | 20086 | if (! current_file) |
abc9d0dc | 20087 | { |
fc474241 DE |
20088 | /* Note: We don't create a macro table for this compilation unit |
20089 | at all until we actually get a filename. */ | |
20090 | struct macro_table *macro_table = get_macro_table (objfile, comp_dir); | |
20091 | ||
abc9d0dc TT |
20092 | /* If we have no current file, then this must be the start_file |
20093 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
20094 | current_file = macro_set_main (macro_table, file_name); |
20095 | macro_define_special (macro_table); | |
abc9d0dc | 20096 | } |
2e276125 | 20097 | else |
233d95b5 | 20098 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 20099 | |
233d95b5 | 20100 | xfree (file_name); |
6e70227d | 20101 | |
2e276125 JB |
20102 | return current_file; |
20103 | } | |
20104 | ||
20105 | ||
20106 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
20107 | followed by a null byte. */ | |
20108 | static char * | |
20109 | copy_string (const char *buf, int len) | |
20110 | { | |
20111 | char *s = xmalloc (len + 1); | |
9a619af0 | 20112 | |
2e276125 JB |
20113 | memcpy (s, buf, len); |
20114 | s[len] = '\0'; | |
2e276125 JB |
20115 | return s; |
20116 | } | |
20117 | ||
20118 | ||
20119 | static const char * | |
20120 | consume_improper_spaces (const char *p, const char *body) | |
20121 | { | |
20122 | if (*p == ' ') | |
20123 | { | |
4d3c2250 | 20124 | complaint (&symfile_complaints, |
3e43a32a MS |
20125 | _("macro definition contains spaces " |
20126 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 20127 | body); |
2e276125 JB |
20128 | |
20129 | while (*p == ' ') | |
20130 | p++; | |
20131 | } | |
20132 | ||
20133 | return p; | |
20134 | } | |
20135 | ||
20136 | ||
20137 | static void | |
20138 | parse_macro_definition (struct macro_source_file *file, int line, | |
20139 | const char *body) | |
20140 | { | |
20141 | const char *p; | |
20142 | ||
20143 | /* The body string takes one of two forms. For object-like macro | |
20144 | definitions, it should be: | |
20145 | ||
20146 | <macro name> " " <definition> | |
20147 | ||
20148 | For function-like macro definitions, it should be: | |
20149 | ||
20150 | <macro name> "() " <definition> | |
20151 | or | |
20152 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
20153 | ||
20154 | Spaces may appear only where explicitly indicated, and in the | |
20155 | <definition>. | |
20156 | ||
20157 | The Dwarf 2 spec says that an object-like macro's name is always | |
20158 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 20159 | the space when the macro's definition is the empty string. |
2e276125 JB |
20160 | |
20161 | The Dwarf 2 spec says that there should be no spaces between the | |
20162 | formal arguments in a function-like macro's formal argument list, | |
20163 | but versions of GCC around March 2002 include spaces after the | |
20164 | commas. */ | |
20165 | ||
20166 | ||
20167 | /* Find the extent of the macro name. The macro name is terminated | |
20168 | by either a space or null character (for an object-like macro) or | |
20169 | an opening paren (for a function-like macro). */ | |
20170 | for (p = body; *p; p++) | |
20171 | if (*p == ' ' || *p == '(') | |
20172 | break; | |
20173 | ||
20174 | if (*p == ' ' || *p == '\0') | |
20175 | { | |
20176 | /* It's an object-like macro. */ | |
20177 | int name_len = p - body; | |
20178 | char *name = copy_string (body, name_len); | |
20179 | const char *replacement; | |
20180 | ||
20181 | if (*p == ' ') | |
20182 | replacement = body + name_len + 1; | |
20183 | else | |
20184 | { | |
4d3c2250 | 20185 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20186 | replacement = body + name_len; |
20187 | } | |
6e70227d | 20188 | |
2e276125 JB |
20189 | macro_define_object (file, line, name, replacement); |
20190 | ||
20191 | xfree (name); | |
20192 | } | |
20193 | else if (*p == '(') | |
20194 | { | |
20195 | /* It's a function-like macro. */ | |
20196 | char *name = copy_string (body, p - body); | |
20197 | int argc = 0; | |
20198 | int argv_size = 1; | |
20199 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
20200 | ||
20201 | p++; | |
20202 | ||
20203 | p = consume_improper_spaces (p, body); | |
20204 | ||
20205 | /* Parse the formal argument list. */ | |
20206 | while (*p && *p != ')') | |
20207 | { | |
20208 | /* Find the extent of the current argument name. */ | |
20209 | const char *arg_start = p; | |
20210 | ||
20211 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
20212 | p++; | |
20213 | ||
20214 | if (! *p || p == arg_start) | |
4d3c2250 | 20215 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20216 | else |
20217 | { | |
20218 | /* Make sure argv has room for the new argument. */ | |
20219 | if (argc >= argv_size) | |
20220 | { | |
20221 | argv_size *= 2; | |
20222 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
20223 | } | |
20224 | ||
20225 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
20226 | } | |
20227 | ||
20228 | p = consume_improper_spaces (p, body); | |
20229 | ||
20230 | /* Consume the comma, if present. */ | |
20231 | if (*p == ',') | |
20232 | { | |
20233 | p++; | |
20234 | ||
20235 | p = consume_improper_spaces (p, body); | |
20236 | } | |
20237 | } | |
20238 | ||
20239 | if (*p == ')') | |
20240 | { | |
20241 | p++; | |
20242 | ||
20243 | if (*p == ' ') | |
20244 | /* Perfectly formed definition, no complaints. */ | |
20245 | macro_define_function (file, line, name, | |
6e70227d | 20246 | argc, (const char **) argv, |
2e276125 JB |
20247 | p + 1); |
20248 | else if (*p == '\0') | |
20249 | { | |
20250 | /* Complain, but do define it. */ | |
4d3c2250 | 20251 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 20252 | macro_define_function (file, line, name, |
6e70227d | 20253 | argc, (const char **) argv, |
2e276125 JB |
20254 | p); |
20255 | } | |
20256 | else | |
20257 | /* Just complain. */ | |
4d3c2250 | 20258 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20259 | } |
20260 | else | |
20261 | /* Just complain. */ | |
4d3c2250 | 20262 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20263 | |
20264 | xfree (name); | |
20265 | { | |
20266 | int i; | |
20267 | ||
20268 | for (i = 0; i < argc; i++) | |
20269 | xfree (argv[i]); | |
20270 | } | |
20271 | xfree (argv); | |
20272 | } | |
20273 | else | |
4d3c2250 | 20274 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
20275 | } |
20276 | ||
cf2c3c16 TT |
20277 | /* Skip some bytes from BYTES according to the form given in FORM. |
20278 | Returns the new pointer. */ | |
2e276125 | 20279 | |
d521ce57 TT |
20280 | static const gdb_byte * |
20281 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
20282 | enum dwarf_form form, |
20283 | unsigned int offset_size, | |
20284 | struct dwarf2_section_info *section) | |
2e276125 | 20285 | { |
cf2c3c16 | 20286 | unsigned int bytes_read; |
2e276125 | 20287 | |
cf2c3c16 | 20288 | switch (form) |
2e276125 | 20289 | { |
cf2c3c16 TT |
20290 | case DW_FORM_data1: |
20291 | case DW_FORM_flag: | |
20292 | ++bytes; | |
20293 | break; | |
20294 | ||
20295 | case DW_FORM_data2: | |
20296 | bytes += 2; | |
20297 | break; | |
20298 | ||
20299 | case DW_FORM_data4: | |
20300 | bytes += 4; | |
20301 | break; | |
20302 | ||
20303 | case DW_FORM_data8: | |
20304 | bytes += 8; | |
20305 | break; | |
20306 | ||
20307 | case DW_FORM_string: | |
20308 | read_direct_string (abfd, bytes, &bytes_read); | |
20309 | bytes += bytes_read; | |
20310 | break; | |
20311 | ||
20312 | case DW_FORM_sec_offset: | |
20313 | case DW_FORM_strp: | |
36586728 | 20314 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
20315 | bytes += offset_size; |
20316 | break; | |
20317 | ||
20318 | case DW_FORM_block: | |
20319 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
20320 | bytes += bytes_read; | |
20321 | break; | |
20322 | ||
20323 | case DW_FORM_block1: | |
20324 | bytes += 1 + read_1_byte (abfd, bytes); | |
20325 | break; | |
20326 | case DW_FORM_block2: | |
20327 | bytes += 2 + read_2_bytes (abfd, bytes); | |
20328 | break; | |
20329 | case DW_FORM_block4: | |
20330 | bytes += 4 + read_4_bytes (abfd, bytes); | |
20331 | break; | |
20332 | ||
20333 | case DW_FORM_sdata: | |
20334 | case DW_FORM_udata: | |
3019eac3 DE |
20335 | case DW_FORM_GNU_addr_index: |
20336 | case DW_FORM_GNU_str_index: | |
d521ce57 | 20337 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
20338 | if (bytes == NULL) |
20339 | { | |
20340 | dwarf2_section_buffer_overflow_complaint (section); | |
20341 | return NULL; | |
20342 | } | |
cf2c3c16 TT |
20343 | break; |
20344 | ||
20345 | default: | |
20346 | { | |
20347 | complain: | |
20348 | complaint (&symfile_complaints, | |
20349 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 20350 | form, get_section_name (section)); |
cf2c3c16 TT |
20351 | return NULL; |
20352 | } | |
2e276125 JB |
20353 | } |
20354 | ||
cf2c3c16 TT |
20355 | return bytes; |
20356 | } | |
757a13d0 | 20357 | |
cf2c3c16 TT |
20358 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
20359 | opcode. Returns an updated pointer to the macro data buffer; or, | |
20360 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 20361 | |
d521ce57 | 20362 | static const gdb_byte * |
cf2c3c16 | 20363 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
20364 | const gdb_byte **opcode_definitions, |
20365 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
20366 | bfd *abfd, |
20367 | unsigned int offset_size, | |
20368 | struct dwarf2_section_info *section) | |
20369 | { | |
20370 | unsigned int bytes_read, i; | |
20371 | unsigned long arg; | |
d521ce57 | 20372 | const gdb_byte *defn; |
2e276125 | 20373 | |
cf2c3c16 | 20374 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 20375 | { |
cf2c3c16 TT |
20376 | complaint (&symfile_complaints, |
20377 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
20378 | opcode); | |
20379 | return NULL; | |
20380 | } | |
2e276125 | 20381 | |
cf2c3c16 TT |
20382 | defn = opcode_definitions[opcode]; |
20383 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
20384 | defn += bytes_read; | |
2e276125 | 20385 | |
cf2c3c16 TT |
20386 | for (i = 0; i < arg; ++i) |
20387 | { | |
f664829e DE |
20388 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
20389 | section); | |
cf2c3c16 TT |
20390 | if (mac_ptr == NULL) |
20391 | { | |
20392 | /* skip_form_bytes already issued the complaint. */ | |
20393 | return NULL; | |
20394 | } | |
20395 | } | |
757a13d0 | 20396 | |
cf2c3c16 TT |
20397 | return mac_ptr; |
20398 | } | |
757a13d0 | 20399 | |
cf2c3c16 TT |
20400 | /* A helper function which parses the header of a macro section. |
20401 | If the macro section is the extended (for now called "GNU") type, | |
20402 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
20403 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 20404 | |
d521ce57 TT |
20405 | static const gdb_byte * |
20406 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 20407 | bfd *abfd, |
d521ce57 | 20408 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
20409 | unsigned int *offset_size, |
20410 | int section_is_gnu) | |
20411 | { | |
20412 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 20413 | |
cf2c3c16 TT |
20414 | if (section_is_gnu) |
20415 | { | |
20416 | unsigned int version, flags; | |
757a13d0 | 20417 | |
cf2c3c16 TT |
20418 | version = read_2_bytes (abfd, mac_ptr); |
20419 | if (version != 4) | |
20420 | { | |
20421 | complaint (&symfile_complaints, | |
20422 | _("unrecognized version `%d' in .debug_macro section"), | |
20423 | version); | |
20424 | return NULL; | |
20425 | } | |
20426 | mac_ptr += 2; | |
757a13d0 | 20427 | |
cf2c3c16 TT |
20428 | flags = read_1_byte (abfd, mac_ptr); |
20429 | ++mac_ptr; | |
20430 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 20431 | |
cf2c3c16 TT |
20432 | if ((flags & 2) != 0) |
20433 | /* We don't need the line table offset. */ | |
20434 | mac_ptr += *offset_size; | |
757a13d0 | 20435 | |
cf2c3c16 TT |
20436 | /* Vendor opcode descriptions. */ |
20437 | if ((flags & 4) != 0) | |
20438 | { | |
20439 | unsigned int i, count; | |
757a13d0 | 20440 | |
cf2c3c16 TT |
20441 | count = read_1_byte (abfd, mac_ptr); |
20442 | ++mac_ptr; | |
20443 | for (i = 0; i < count; ++i) | |
20444 | { | |
20445 | unsigned int opcode, bytes_read; | |
20446 | unsigned long arg; | |
20447 | ||
20448 | opcode = read_1_byte (abfd, mac_ptr); | |
20449 | ++mac_ptr; | |
20450 | opcode_definitions[opcode] = mac_ptr; | |
20451 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20452 | mac_ptr += bytes_read; | |
20453 | mac_ptr += arg; | |
20454 | } | |
757a13d0 | 20455 | } |
cf2c3c16 | 20456 | } |
757a13d0 | 20457 | |
cf2c3c16 TT |
20458 | return mac_ptr; |
20459 | } | |
757a13d0 | 20460 | |
cf2c3c16 | 20461 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 20462 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
20463 | |
20464 | static void | |
d521ce57 TT |
20465 | dwarf_decode_macro_bytes (bfd *abfd, |
20466 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 20467 | struct macro_source_file *current_file, |
15d034d0 | 20468 | struct line_header *lh, const char *comp_dir, |
cf2c3c16 | 20469 | struct dwarf2_section_info *section, |
36586728 | 20470 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 20471 | unsigned int offset_size, |
8fc3fc34 TT |
20472 | struct objfile *objfile, |
20473 | htab_t include_hash) | |
cf2c3c16 TT |
20474 | { |
20475 | enum dwarf_macro_record_type macinfo_type; | |
20476 | int at_commandline; | |
d521ce57 | 20477 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 20478 | |
cf2c3c16 TT |
20479 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
20480 | &offset_size, section_is_gnu); | |
20481 | if (mac_ptr == NULL) | |
20482 | { | |
20483 | /* We already issued a complaint. */ | |
20484 | return; | |
20485 | } | |
757a13d0 JK |
20486 | |
20487 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
20488 | GDB is still reading the definitions from command line. First | |
20489 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
20490 | to create CURRENT_FILE for the main source holding also the command line | |
20491 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
20492 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
20493 | ||
20494 | at_commandline = 1; | |
20495 | ||
20496 | do | |
20497 | { | |
20498 | /* Do we at least have room for a macinfo type byte? */ | |
20499 | if (mac_ptr >= mac_end) | |
20500 | { | |
f664829e | 20501 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
20502 | break; |
20503 | } | |
20504 | ||
20505 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
20506 | mac_ptr++; | |
20507 | ||
cf2c3c16 TT |
20508 | /* Note that we rely on the fact that the corresponding GNU and |
20509 | DWARF constants are the same. */ | |
757a13d0 JK |
20510 | switch (macinfo_type) |
20511 | { | |
20512 | /* A zero macinfo type indicates the end of the macro | |
20513 | information. */ | |
20514 | case 0: | |
20515 | break; | |
2e276125 | 20516 | |
cf2c3c16 TT |
20517 | case DW_MACRO_GNU_define: |
20518 | case DW_MACRO_GNU_undef: | |
20519 | case DW_MACRO_GNU_define_indirect: | |
20520 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
20521 | case DW_MACRO_GNU_define_indirect_alt: |
20522 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 20523 | { |
891d2f0b | 20524 | unsigned int bytes_read; |
2e276125 | 20525 | int line; |
d521ce57 | 20526 | const char *body; |
cf2c3c16 | 20527 | int is_define; |
2e276125 | 20528 | |
cf2c3c16 TT |
20529 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
20530 | mac_ptr += bytes_read; | |
20531 | ||
20532 | if (macinfo_type == DW_MACRO_GNU_define | |
20533 | || macinfo_type == DW_MACRO_GNU_undef) | |
20534 | { | |
20535 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
20536 | mac_ptr += bytes_read; | |
20537 | } | |
20538 | else | |
20539 | { | |
20540 | LONGEST str_offset; | |
20541 | ||
20542 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
20543 | mac_ptr += offset_size; | |
2e276125 | 20544 | |
36586728 | 20545 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
20546 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
20547 | || section_is_dwz) | |
36586728 TT |
20548 | { |
20549 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
20550 | ||
20551 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
20552 | } | |
20553 | else | |
20554 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
20555 | } |
20556 | ||
20557 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
20558 | || macinfo_type == DW_MACRO_GNU_define_indirect |
20559 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 20560 | if (! current_file) |
757a13d0 JK |
20561 | { |
20562 | /* DWARF violation as no main source is present. */ | |
20563 | complaint (&symfile_complaints, | |
20564 | _("debug info with no main source gives macro %s " | |
20565 | "on line %d: %s"), | |
cf2c3c16 TT |
20566 | is_define ? _("definition") : _("undefinition"), |
20567 | line, body); | |
757a13d0 JK |
20568 | break; |
20569 | } | |
3e43a32a MS |
20570 | if ((line == 0 && !at_commandline) |
20571 | || (line != 0 && at_commandline)) | |
4d3c2250 | 20572 | complaint (&symfile_complaints, |
757a13d0 JK |
20573 | _("debug info gives %s macro %s with %s line %d: %s"), |
20574 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 20575 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
20576 | line == 0 ? _("zero") : _("non-zero"), line, body); |
20577 | ||
cf2c3c16 | 20578 | if (is_define) |
757a13d0 | 20579 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
20580 | else |
20581 | { | |
20582 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
20583 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
20584 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
20585 | macro_undef (current_file, line, body); |
20586 | } | |
2e276125 JB |
20587 | } |
20588 | break; | |
20589 | ||
cf2c3c16 | 20590 | case DW_MACRO_GNU_start_file: |
2e276125 | 20591 | { |
891d2f0b | 20592 | unsigned int bytes_read; |
2e276125 JB |
20593 | int line, file; |
20594 | ||
20595 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20596 | mac_ptr += bytes_read; | |
20597 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20598 | mac_ptr += bytes_read; | |
20599 | ||
3e43a32a MS |
20600 | if ((line == 0 && !at_commandline) |
20601 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
20602 | complaint (&symfile_complaints, |
20603 | _("debug info gives source %d included " | |
20604 | "from %s at %s line %d"), | |
20605 | file, at_commandline ? _("command-line") : _("file"), | |
20606 | line == 0 ? _("zero") : _("non-zero"), line); | |
20607 | ||
20608 | if (at_commandline) | |
20609 | { | |
cf2c3c16 TT |
20610 | /* This DW_MACRO_GNU_start_file was executed in the |
20611 | pass one. */ | |
757a13d0 JK |
20612 | at_commandline = 0; |
20613 | } | |
20614 | else | |
20615 | current_file = macro_start_file (file, line, | |
20616 | current_file, comp_dir, | |
cf2c3c16 | 20617 | lh, objfile); |
2e276125 JB |
20618 | } |
20619 | break; | |
20620 | ||
cf2c3c16 | 20621 | case DW_MACRO_GNU_end_file: |
2e276125 | 20622 | if (! current_file) |
4d3c2250 | 20623 | complaint (&symfile_complaints, |
3e43a32a MS |
20624 | _("macro debug info has an unmatched " |
20625 | "`close_file' directive")); | |
2e276125 JB |
20626 | else |
20627 | { | |
20628 | current_file = current_file->included_by; | |
20629 | if (! current_file) | |
20630 | { | |
cf2c3c16 | 20631 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
20632 | |
20633 | /* GCC circa March 2002 doesn't produce the zero | |
20634 | type byte marking the end of the compilation | |
20635 | unit. Complain if it's not there, but exit no | |
20636 | matter what. */ | |
20637 | ||
20638 | /* Do we at least have room for a macinfo type byte? */ | |
20639 | if (mac_ptr >= mac_end) | |
20640 | { | |
f664829e | 20641 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
20642 | return; |
20643 | } | |
20644 | ||
20645 | /* We don't increment mac_ptr here, so this is just | |
20646 | a look-ahead. */ | |
20647 | next_type = read_1_byte (abfd, mac_ptr); | |
20648 | if (next_type != 0) | |
4d3c2250 | 20649 | complaint (&symfile_complaints, |
3e43a32a MS |
20650 | _("no terminating 0-type entry for " |
20651 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
20652 | |
20653 | return; | |
20654 | } | |
20655 | } | |
20656 | break; | |
20657 | ||
cf2c3c16 | 20658 | case DW_MACRO_GNU_transparent_include: |
36586728 | 20659 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
20660 | { |
20661 | LONGEST offset; | |
8fc3fc34 | 20662 | void **slot; |
a036ba48 TT |
20663 | bfd *include_bfd = abfd; |
20664 | struct dwarf2_section_info *include_section = section; | |
20665 | struct dwarf2_section_info alt_section; | |
d521ce57 | 20666 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 20667 | int is_dwz = section_is_dwz; |
d521ce57 | 20668 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
20669 | |
20670 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
20671 | mac_ptr += offset_size; | |
20672 | ||
a036ba48 TT |
20673 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
20674 | { | |
20675 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
20676 | ||
20677 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
20678 | &dwz->macro); | |
20679 | ||
a036ba48 | 20680 | include_section = &dwz->macro; |
a32a8923 | 20681 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
20682 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
20683 | is_dwz = 1; | |
20684 | } | |
20685 | ||
20686 | new_mac_ptr = include_section->buffer + offset; | |
20687 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
20688 | ||
8fc3fc34 TT |
20689 | if (*slot != NULL) |
20690 | { | |
20691 | /* This has actually happened; see | |
20692 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
20693 | complaint (&symfile_complaints, | |
20694 | _("recursive DW_MACRO_GNU_transparent_include in " | |
20695 | ".debug_macro section")); | |
20696 | } | |
20697 | else | |
20698 | { | |
d521ce57 | 20699 | *slot = (void *) new_mac_ptr; |
36586728 | 20700 | |
a036ba48 | 20701 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 20702 | include_mac_end, current_file, |
8fc3fc34 | 20703 | lh, comp_dir, |
36586728 | 20704 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
20705 | offset_size, objfile, include_hash); |
20706 | ||
d521ce57 | 20707 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 20708 | } |
cf2c3c16 TT |
20709 | } |
20710 | break; | |
20711 | ||
2e276125 | 20712 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
20713 | if (!section_is_gnu) |
20714 | { | |
20715 | unsigned int bytes_read; | |
20716 | int constant; | |
2e276125 | 20717 | |
cf2c3c16 TT |
20718 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
20719 | mac_ptr += bytes_read; | |
20720 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
20721 | mac_ptr += bytes_read; | |
2e276125 | 20722 | |
cf2c3c16 TT |
20723 | /* We don't recognize any vendor extensions. */ |
20724 | break; | |
20725 | } | |
20726 | /* FALLTHROUGH */ | |
20727 | ||
20728 | default: | |
20729 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 20730 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
20731 | section); |
20732 | if (mac_ptr == NULL) | |
20733 | return; | |
20734 | break; | |
2e276125 | 20735 | } |
757a13d0 | 20736 | } while (macinfo_type != 0); |
2e276125 | 20737 | } |
8e19ed76 | 20738 | |
cf2c3c16 | 20739 | static void |
09262596 | 20740 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
15d034d0 | 20741 | const char *comp_dir, int section_is_gnu) |
cf2c3c16 | 20742 | { |
bb5ed363 | 20743 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
20744 | struct line_header *lh = cu->line_header; |
20745 | bfd *abfd; | |
d521ce57 | 20746 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
20747 | struct macro_source_file *current_file = 0; |
20748 | enum dwarf_macro_record_type macinfo_type; | |
20749 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 20750 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
20751 | struct cleanup *cleanup; |
20752 | htab_t include_hash; | |
20753 | void **slot; | |
09262596 DE |
20754 | struct dwarf2_section_info *section; |
20755 | const char *section_name; | |
20756 | ||
20757 | if (cu->dwo_unit != NULL) | |
20758 | { | |
20759 | if (section_is_gnu) | |
20760 | { | |
20761 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
20762 | section_name = ".debug_macro.dwo"; | |
20763 | } | |
20764 | else | |
20765 | { | |
20766 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
20767 | section_name = ".debug_macinfo.dwo"; | |
20768 | } | |
20769 | } | |
20770 | else | |
20771 | { | |
20772 | if (section_is_gnu) | |
20773 | { | |
20774 | section = &dwarf2_per_objfile->macro; | |
20775 | section_name = ".debug_macro"; | |
20776 | } | |
20777 | else | |
20778 | { | |
20779 | section = &dwarf2_per_objfile->macinfo; | |
20780 | section_name = ".debug_macinfo"; | |
20781 | } | |
20782 | } | |
cf2c3c16 | 20783 | |
bb5ed363 | 20784 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
20785 | if (section->buffer == NULL) |
20786 | { | |
fceca515 | 20787 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
20788 | return; |
20789 | } | |
a32a8923 | 20790 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
20791 | |
20792 | /* First pass: Find the name of the base filename. | |
20793 | This filename is needed in order to process all macros whose definition | |
20794 | (or undefinition) comes from the command line. These macros are defined | |
20795 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
20796 | associated to the base file. | |
20797 | ||
20798 | To determine the base file name, we scan the macro definitions until we | |
20799 | reach the first DW_MACINFO_start_file entry. We then initialize | |
20800 | CURRENT_FILE accordingly so that any macro definition found before the | |
20801 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
20802 | ||
20803 | mac_ptr = section->buffer + offset; | |
20804 | mac_end = section->buffer + section->size; | |
20805 | ||
20806 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
20807 | &offset_size, section_is_gnu); | |
20808 | if (mac_ptr == NULL) | |
20809 | { | |
20810 | /* We already issued a complaint. */ | |
20811 | return; | |
20812 | } | |
20813 | ||
20814 | do | |
20815 | { | |
20816 | /* Do we at least have room for a macinfo type byte? */ | |
20817 | if (mac_ptr >= mac_end) | |
20818 | { | |
20819 | /* Complaint is printed during the second pass as GDB will probably | |
20820 | stop the first pass earlier upon finding | |
20821 | DW_MACINFO_start_file. */ | |
20822 | break; | |
20823 | } | |
20824 | ||
20825 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
20826 | mac_ptr++; | |
20827 | ||
20828 | /* Note that we rely on the fact that the corresponding GNU and | |
20829 | DWARF constants are the same. */ | |
20830 | switch (macinfo_type) | |
20831 | { | |
20832 | /* A zero macinfo type indicates the end of the macro | |
20833 | information. */ | |
20834 | case 0: | |
20835 | break; | |
20836 | ||
20837 | case DW_MACRO_GNU_define: | |
20838 | case DW_MACRO_GNU_undef: | |
20839 | /* Only skip the data by MAC_PTR. */ | |
20840 | { | |
20841 | unsigned int bytes_read; | |
20842 | ||
20843 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20844 | mac_ptr += bytes_read; | |
20845 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
20846 | mac_ptr += bytes_read; | |
20847 | } | |
20848 | break; | |
20849 | ||
20850 | case DW_MACRO_GNU_start_file: | |
20851 | { | |
20852 | unsigned int bytes_read; | |
20853 | int line, file; | |
20854 | ||
20855 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20856 | mac_ptr += bytes_read; | |
20857 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20858 | mac_ptr += bytes_read; | |
20859 | ||
20860 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 20861 | comp_dir, lh, objfile); |
cf2c3c16 TT |
20862 | } |
20863 | break; | |
20864 | ||
20865 | case DW_MACRO_GNU_end_file: | |
20866 | /* No data to skip by MAC_PTR. */ | |
20867 | break; | |
20868 | ||
20869 | case DW_MACRO_GNU_define_indirect: | |
20870 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
20871 | case DW_MACRO_GNU_define_indirect_alt: |
20872 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
20873 | { |
20874 | unsigned int bytes_read; | |
20875 | ||
20876 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20877 | mac_ptr += bytes_read; | |
20878 | mac_ptr += offset_size; | |
20879 | } | |
20880 | break; | |
20881 | ||
20882 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 20883 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
20884 | /* Note that, according to the spec, a transparent include |
20885 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
20886 | skip this opcode. */ | |
20887 | mac_ptr += offset_size; | |
20888 | break; | |
20889 | ||
20890 | case DW_MACINFO_vendor_ext: | |
20891 | /* Only skip the data by MAC_PTR. */ | |
20892 | if (!section_is_gnu) | |
20893 | { | |
20894 | unsigned int bytes_read; | |
20895 | ||
20896 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
20897 | mac_ptr += bytes_read; | |
20898 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
20899 | mac_ptr += bytes_read; | |
20900 | } | |
20901 | /* FALLTHROUGH */ | |
20902 | ||
20903 | default: | |
20904 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 20905 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
20906 | section); |
20907 | if (mac_ptr == NULL) | |
20908 | return; | |
20909 | break; | |
20910 | } | |
20911 | } while (macinfo_type != 0 && current_file == NULL); | |
20912 | ||
20913 | /* Second pass: Process all entries. | |
20914 | ||
20915 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
20916 | command-line macro definitions/undefinitions. This flag is unset when we | |
20917 | reach the first DW_MACINFO_start_file entry. */ | |
20918 | ||
8fc3fc34 TT |
20919 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
20920 | NULL, xcalloc, xfree); | |
20921 | cleanup = make_cleanup_htab_delete (include_hash); | |
20922 | mac_ptr = section->buffer + offset; | |
20923 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 20924 | *slot = (void *) mac_ptr; |
8fc3fc34 | 20925 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
36586728 TT |
20926 | current_file, lh, comp_dir, section, |
20927 | section_is_gnu, 0, | |
8fc3fc34 TT |
20928 | offset_size, objfile, include_hash); |
20929 | do_cleanups (cleanup); | |
cf2c3c16 TT |
20930 | } |
20931 | ||
8e19ed76 | 20932 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 20933 | if so return true else false. */ |
380bca97 | 20934 | |
8e19ed76 | 20935 | static int |
6e5a29e1 | 20936 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
20937 | { |
20938 | return (attr == NULL ? 0 : | |
20939 | attr->form == DW_FORM_block1 | |
20940 | || attr->form == DW_FORM_block2 | |
20941 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
20942 | || attr->form == DW_FORM_block |
20943 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 20944 | } |
4c2df51b | 20945 | |
c6a0999f JB |
20946 | /* Return non-zero if ATTR's value is a section offset --- classes |
20947 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
20948 | You may use DW_UNSND (attr) to retrieve such offsets. | |
20949 | ||
20950 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
20951 | may have a value that belongs to more than one of these classes; it | |
20952 | would be ambiguous if we did, because we use the same forms for all | |
20953 | of them. */ | |
380bca97 | 20954 | |
3690dd37 | 20955 | static int |
6e5a29e1 | 20956 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
20957 | { |
20958 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
20959 | || attr->form == DW_FORM_data8 |
20960 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
20961 | } |
20962 | ||
3690dd37 JB |
20963 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
20964 | zero otherwise. When this function returns true, you can apply | |
20965 | dwarf2_get_attr_constant_value to it. | |
20966 | ||
20967 | However, note that for some attributes you must check | |
20968 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
20969 | and DW_FORM_data8 are members of both the constant class, and of | |
20970 | the classes that contain offsets into other debug sections | |
20971 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
20972 | that, if an attribute's can be either a constant or one of the | |
20973 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
20974 | taken as section offsets, not constants. */ | |
380bca97 | 20975 | |
3690dd37 | 20976 | static int |
6e5a29e1 | 20977 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
20978 | { |
20979 | switch (attr->form) | |
20980 | { | |
20981 | case DW_FORM_sdata: | |
20982 | case DW_FORM_udata: | |
20983 | case DW_FORM_data1: | |
20984 | case DW_FORM_data2: | |
20985 | case DW_FORM_data4: | |
20986 | case DW_FORM_data8: | |
20987 | return 1; | |
20988 | default: | |
20989 | return 0; | |
20990 | } | |
20991 | } | |
20992 | ||
7771576e SA |
20993 | |
20994 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
20995 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
20996 | ||
20997 | static int | |
6e5a29e1 | 20998 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
20999 | { |
21000 | switch (attr->form) | |
21001 | { | |
21002 | case DW_FORM_ref_addr: | |
21003 | case DW_FORM_ref1: | |
21004 | case DW_FORM_ref2: | |
21005 | case DW_FORM_ref4: | |
21006 | case DW_FORM_ref8: | |
21007 | case DW_FORM_ref_udata: | |
21008 | case DW_FORM_GNU_ref_alt: | |
21009 | return 1; | |
21010 | default: | |
21011 | return 0; | |
21012 | } | |
21013 | } | |
21014 | ||
3019eac3 DE |
21015 | /* Return the .debug_loc section to use for CU. |
21016 | For DWO files use .debug_loc.dwo. */ | |
21017 | ||
21018 | static struct dwarf2_section_info * | |
21019 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
21020 | { | |
21021 | if (cu->dwo_unit) | |
21022 | return &cu->dwo_unit->dwo_file->sections.loc; | |
21023 | return &dwarf2_per_objfile->loc; | |
21024 | } | |
21025 | ||
8cf6f0b1 TT |
21026 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
21027 | ||
21028 | static void | |
21029 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
21030 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 21031 | const struct attribute *attr) |
8cf6f0b1 | 21032 | { |
3019eac3 DE |
21033 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
21034 | ||
21035 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
21036 | |
21037 | baton->per_cu = cu->per_cu; | |
21038 | gdb_assert (baton->per_cu); | |
21039 | /* We don't know how long the location list is, but make sure we | |
21040 | don't run off the edge of the section. */ | |
3019eac3 DE |
21041 | baton->size = section->size - DW_UNSND (attr); |
21042 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 21043 | baton->base_address = cu->base_address; |
f664829e | 21044 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
21045 | } |
21046 | ||
4c2df51b | 21047 | static void |
ff39bb5e | 21048 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 21049 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 21050 | { |
bb5ed363 | 21051 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 21052 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 21053 | |
3690dd37 | 21054 | if (attr_form_is_section_offset (attr) |
3019eac3 | 21055 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
21056 | the section. If so, fall through to the complaint in the |
21057 | other branch. */ | |
3019eac3 | 21058 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 21059 | { |
0d53c4c4 | 21060 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 21061 | |
bb5ed363 | 21062 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 21063 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 21064 | |
8cf6f0b1 | 21065 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 21066 | |
d00adf39 | 21067 | if (cu->base_known == 0) |
0d53c4c4 | 21068 | complaint (&symfile_complaints, |
3e43a32a MS |
21069 | _("Location list used without " |
21070 | "specifying the CU base address.")); | |
4c2df51b | 21071 | |
f1e6e072 TT |
21072 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21073 | ? dwarf2_loclist_block_index | |
21074 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
21075 | SYMBOL_LOCATION_BATON (sym) = baton; |
21076 | } | |
21077 | else | |
21078 | { | |
21079 | struct dwarf2_locexpr_baton *baton; | |
21080 | ||
bb5ed363 | 21081 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 21082 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
21083 | baton->per_cu = cu->per_cu; |
21084 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
21085 | |
21086 | if (attr_form_is_block (attr)) | |
21087 | { | |
21088 | /* Note that we're just copying the block's data pointer | |
21089 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
21090 | info_buffer for SYM's objfile; right now we never release |
21091 | that buffer, but when we do clean up properly this may | |
21092 | need to change. */ | |
0d53c4c4 DJ |
21093 | baton->size = DW_BLOCK (attr)->size; |
21094 | baton->data = DW_BLOCK (attr)->data; | |
21095 | } | |
21096 | else | |
21097 | { | |
21098 | dwarf2_invalid_attrib_class_complaint ("location description", | |
21099 | SYMBOL_NATURAL_NAME (sym)); | |
21100 | baton->size = 0; | |
0d53c4c4 | 21101 | } |
6e70227d | 21102 | |
f1e6e072 TT |
21103 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
21104 | ? dwarf2_locexpr_block_index | |
21105 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
21106 | SYMBOL_LOCATION_BATON (sym) = baton; |
21107 | } | |
4c2df51b | 21108 | } |
6502dd73 | 21109 | |
9aa1f1e3 TT |
21110 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
21111 | came from a separate debuginfo file, then the master objfile is | |
21112 | returned. */ | |
ae0d2f24 UW |
21113 | |
21114 | struct objfile * | |
21115 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
21116 | { | |
9291a0cd | 21117 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
21118 | |
21119 | /* Return the master objfile, so that we can report and look up the | |
21120 | correct file containing this variable. */ | |
21121 | if (objfile->separate_debug_objfile_backlink) | |
21122 | objfile = objfile->separate_debug_objfile_backlink; | |
21123 | ||
21124 | return objfile; | |
21125 | } | |
21126 | ||
96408a79 SA |
21127 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
21128 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
21129 | CU_HEADERP first. */ | |
21130 | ||
21131 | static const struct comp_unit_head * | |
21132 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
21133 | struct dwarf2_per_cu_data *per_cu) | |
21134 | { | |
d521ce57 | 21135 | const gdb_byte *info_ptr; |
96408a79 SA |
21136 | |
21137 | if (per_cu->cu) | |
21138 | return &per_cu->cu->header; | |
21139 | ||
8a0459fd | 21140 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
21141 | |
21142 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 21143 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
21144 | |
21145 | return cu_headerp; | |
21146 | } | |
21147 | ||
ae0d2f24 UW |
21148 | /* Return the address size given in the compilation unit header for CU. */ |
21149 | ||
98714339 | 21150 | int |
ae0d2f24 UW |
21151 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
21152 | { | |
96408a79 SA |
21153 | struct comp_unit_head cu_header_local; |
21154 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 21155 | |
96408a79 SA |
21156 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21157 | ||
21158 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
21159 | } |
21160 | ||
9eae7c52 TT |
21161 | /* Return the offset size given in the compilation unit header for CU. */ |
21162 | ||
21163 | int | |
21164 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
21165 | { | |
96408a79 SA |
21166 | struct comp_unit_head cu_header_local; |
21167 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 21168 | |
96408a79 SA |
21169 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
21170 | ||
21171 | return cu_headerp->offset_size; | |
21172 | } | |
21173 | ||
21174 | /* See its dwarf2loc.h declaration. */ | |
21175 | ||
21176 | int | |
21177 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
21178 | { | |
21179 | struct comp_unit_head cu_header_local; | |
21180 | const struct comp_unit_head *cu_headerp; | |
21181 | ||
21182 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
21183 | ||
21184 | if (cu_headerp->version == 2) | |
21185 | return cu_headerp->addr_size; | |
21186 | else | |
21187 | return cu_headerp->offset_size; | |
181cebd4 JK |
21188 | } |
21189 | ||
9aa1f1e3 TT |
21190 | /* Return the text offset of the CU. The returned offset comes from |
21191 | this CU's objfile. If this objfile came from a separate debuginfo | |
21192 | file, then the offset may be different from the corresponding | |
21193 | offset in the parent objfile. */ | |
21194 | ||
21195 | CORE_ADDR | |
21196 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
21197 | { | |
bb3fa9d0 | 21198 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
21199 | |
21200 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
21201 | } | |
21202 | ||
348e048f DE |
21203 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
21204 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
21205 | |
21206 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 21207 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 21208 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
21209 | struct objfile *objfile) |
21210 | { | |
21211 | struct dwarf2_per_cu_data *this_cu; | |
21212 | int low, high; | |
36586728 | 21213 | const sect_offset *cu_off; |
ae038cb0 | 21214 | |
ae038cb0 DJ |
21215 | low = 0; |
21216 | high = dwarf2_per_objfile->n_comp_units - 1; | |
21217 | while (high > low) | |
21218 | { | |
36586728 | 21219 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 21220 | int mid = low + (high - low) / 2; |
9a619af0 | 21221 | |
36586728 TT |
21222 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
21223 | cu_off = &mid_cu->offset; | |
21224 | if (mid_cu->is_dwz > offset_in_dwz | |
21225 | || (mid_cu->is_dwz == offset_in_dwz | |
21226 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
21227 | high = mid; |
21228 | else | |
21229 | low = mid + 1; | |
21230 | } | |
21231 | gdb_assert (low == high); | |
36586728 TT |
21232 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
21233 | cu_off = &this_cu->offset; | |
21234 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 21235 | { |
36586728 | 21236 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
21237 | error (_("Dwarf Error: could not find partial DIE containing " |
21238 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 21239 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 21240 | |
b64f50a1 JK |
21241 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
21242 | <= offset.sect_off); | |
ae038cb0 DJ |
21243 | return dwarf2_per_objfile->all_comp_units[low-1]; |
21244 | } | |
21245 | else | |
21246 | { | |
21247 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
21248 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
21249 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
21250 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
21251 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
21252 | return this_cu; |
21253 | } | |
21254 | } | |
21255 | ||
23745b47 | 21256 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 21257 | |
9816fde3 | 21258 | static void |
23745b47 | 21259 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 21260 | { |
9816fde3 | 21261 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
21262 | per_cu->cu = cu; |
21263 | cu->per_cu = per_cu; | |
21264 | cu->objfile = per_cu->objfile; | |
93311388 | 21265 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
21266 | } |
21267 | ||
21268 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
21269 | ||
21270 | static void | |
95554aad TT |
21271 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
21272 | enum language pretend_language) | |
9816fde3 JK |
21273 | { |
21274 | struct attribute *attr; | |
21275 | ||
21276 | /* Set the language we're debugging. */ | |
21277 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
21278 | if (attr) | |
21279 | set_cu_language (DW_UNSND (attr), cu); | |
21280 | else | |
9cded63f | 21281 | { |
95554aad | 21282 | cu->language = pretend_language; |
9cded63f TT |
21283 | cu->language_defn = language_def (cu->language); |
21284 | } | |
dee91e82 DE |
21285 | |
21286 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
21287 | if (attr) | |
21288 | cu->producer = DW_STRING (attr); | |
93311388 DE |
21289 | } |
21290 | ||
ae038cb0 DJ |
21291 | /* Release one cached compilation unit, CU. We unlink it from the tree |
21292 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
21293 | the caller is responsible for that. |
21294 | NOTE: DATA is a void * because this function is also used as a | |
21295 | cleanup routine. */ | |
ae038cb0 DJ |
21296 | |
21297 | static void | |
68dc6402 | 21298 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
21299 | { |
21300 | struct dwarf2_cu *cu = data; | |
21301 | ||
23745b47 DE |
21302 | gdb_assert (cu->per_cu != NULL); |
21303 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
21304 | cu->per_cu = NULL; |
21305 | ||
21306 | obstack_free (&cu->comp_unit_obstack, NULL); | |
21307 | ||
21308 | xfree (cu); | |
21309 | } | |
21310 | ||
72bf9492 | 21311 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 21312 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 21313 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
21314 | |
21315 | static void | |
21316 | free_stack_comp_unit (void *data) | |
21317 | { | |
21318 | struct dwarf2_cu *cu = data; | |
21319 | ||
23745b47 DE |
21320 | gdb_assert (cu->per_cu != NULL); |
21321 | cu->per_cu->cu = NULL; | |
21322 | cu->per_cu = NULL; | |
21323 | ||
72bf9492 DJ |
21324 | obstack_free (&cu->comp_unit_obstack, NULL); |
21325 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
21326 | } |
21327 | ||
21328 | /* Free all cached compilation units. */ | |
21329 | ||
21330 | static void | |
21331 | free_cached_comp_units (void *data) | |
21332 | { | |
21333 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21334 | ||
21335 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21336 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21337 | while (per_cu != NULL) | |
21338 | { | |
21339 | struct dwarf2_per_cu_data *next_cu; | |
21340 | ||
21341 | next_cu = per_cu->cu->read_in_chain; | |
21342 | ||
68dc6402 | 21343 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
21344 | *last_chain = next_cu; |
21345 | ||
21346 | per_cu = next_cu; | |
21347 | } | |
21348 | } | |
21349 | ||
21350 | /* Increase the age counter on each cached compilation unit, and free | |
21351 | any that are too old. */ | |
21352 | ||
21353 | static void | |
21354 | age_cached_comp_units (void) | |
21355 | { | |
21356 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21357 | ||
21358 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
21359 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21360 | while (per_cu != NULL) | |
21361 | { | |
21362 | per_cu->cu->last_used ++; | |
21363 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
21364 | dwarf2_mark (per_cu->cu); | |
21365 | per_cu = per_cu->cu->read_in_chain; | |
21366 | } | |
21367 | ||
21368 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21369 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21370 | while (per_cu != NULL) | |
21371 | { | |
21372 | struct dwarf2_per_cu_data *next_cu; | |
21373 | ||
21374 | next_cu = per_cu->cu->read_in_chain; | |
21375 | ||
21376 | if (!per_cu->cu->mark) | |
21377 | { | |
68dc6402 | 21378 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
21379 | *last_chain = next_cu; |
21380 | } | |
21381 | else | |
21382 | last_chain = &per_cu->cu->read_in_chain; | |
21383 | ||
21384 | per_cu = next_cu; | |
21385 | } | |
21386 | } | |
21387 | ||
21388 | /* Remove a single compilation unit from the cache. */ | |
21389 | ||
21390 | static void | |
dee91e82 | 21391 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
21392 | { |
21393 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
21394 | ||
21395 | per_cu = dwarf2_per_objfile->read_in_chain; | |
21396 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
21397 | while (per_cu != NULL) | |
21398 | { | |
21399 | struct dwarf2_per_cu_data *next_cu; | |
21400 | ||
21401 | next_cu = per_cu->cu->read_in_chain; | |
21402 | ||
dee91e82 | 21403 | if (per_cu == target_per_cu) |
ae038cb0 | 21404 | { |
68dc6402 | 21405 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 21406 | per_cu->cu = NULL; |
ae038cb0 DJ |
21407 | *last_chain = next_cu; |
21408 | break; | |
21409 | } | |
21410 | else | |
21411 | last_chain = &per_cu->cu->read_in_chain; | |
21412 | ||
21413 | per_cu = next_cu; | |
21414 | } | |
21415 | } | |
21416 | ||
fe3e1990 DJ |
21417 | /* Release all extra memory associated with OBJFILE. */ |
21418 | ||
21419 | void | |
21420 | dwarf2_free_objfile (struct objfile *objfile) | |
21421 | { | |
21422 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
21423 | ||
21424 | if (dwarf2_per_objfile == NULL) | |
21425 | return; | |
21426 | ||
21427 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
21428 | free_cached_comp_units (NULL); | |
21429 | ||
7b9f3c50 DE |
21430 | if (dwarf2_per_objfile->quick_file_names_table) |
21431 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 21432 | |
fe3e1990 DJ |
21433 | /* Everything else should be on the objfile obstack. */ |
21434 | } | |
21435 | ||
dee91e82 DE |
21436 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
21437 | We store these in a hash table separate from the DIEs, and preserve them | |
21438 | when the DIEs are flushed out of cache. | |
21439 | ||
21440 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 21441 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
21442 | or the type may come from a DWO file. Furthermore, while it's more logical |
21443 | to use per_cu->section+offset, with Fission the section with the data is in | |
21444 | the DWO file but we don't know that section at the point we need it. | |
21445 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
21446 | because we can enter the lookup routine, get_die_type_at_offset, from | |
21447 | outside this file, and thus won't necessarily have PER_CU->cu. | |
21448 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 21449 | |
dee91e82 | 21450 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 21451 | { |
dee91e82 | 21452 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 21453 | sect_offset offset; |
1c379e20 DJ |
21454 | struct type *type; |
21455 | }; | |
21456 | ||
dee91e82 | 21457 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
21458 | |
21459 | static hashval_t | |
dee91e82 | 21460 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 21461 | { |
dee91e82 | 21462 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 21463 | |
dee91e82 | 21464 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
21465 | } |
21466 | ||
dee91e82 | 21467 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
21468 | |
21469 | static int | |
dee91e82 | 21470 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 21471 | { |
dee91e82 DE |
21472 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
21473 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 21474 | |
dee91e82 DE |
21475 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
21476 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
21477 | } |
21478 | ||
21479 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
21480 | table if necessary. For convenience, return TYPE. |
21481 | ||
21482 | The DIEs reading must have careful ordering to: | |
21483 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
21484 | reading current DIE. | |
21485 | * Not trying to dereference contents of still incompletely read in types | |
21486 | while reading in other DIEs. | |
21487 | * Enable referencing still incompletely read in types just by a pointer to | |
21488 | the type without accessing its fields. | |
21489 | ||
21490 | Therefore caller should follow these rules: | |
21491 | * Try to fetch any prerequisite types we may need to build this DIE type | |
21492 | before building the type and calling set_die_type. | |
e71ec853 | 21493 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
21494 | possible before fetching more types to complete the current type. |
21495 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 21496 | |
f792889a | 21497 | static struct type * |
1c379e20 DJ |
21498 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
21499 | { | |
dee91e82 | 21500 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 21501 | struct objfile *objfile = cu->objfile; |
1c379e20 | 21502 | |
b4ba55a1 JB |
21503 | /* For Ada types, make sure that the gnat-specific data is always |
21504 | initialized (if not already set). There are a few types where | |
21505 | we should not be doing so, because the type-specific area is | |
21506 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
21507 | where the type-specific area is used to store the floatformat). | |
21508 | But this is not a problem, because the gnat-specific information | |
21509 | is actually not needed for these types. */ | |
21510 | if (need_gnat_info (cu) | |
21511 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
21512 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
21513 | && !HAVE_GNAT_AUX_INFO (type)) | |
21514 | INIT_GNAT_SPECIFIC (type); | |
21515 | ||
dee91e82 | 21516 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 21517 | { |
dee91e82 DE |
21518 | dwarf2_per_objfile->die_type_hash = |
21519 | htab_create_alloc_ex (127, | |
21520 | per_cu_offset_and_type_hash, | |
21521 | per_cu_offset_and_type_eq, | |
21522 | NULL, | |
21523 | &objfile->objfile_obstack, | |
21524 | hashtab_obstack_allocate, | |
21525 | dummy_obstack_deallocate); | |
f792889a | 21526 | } |
1c379e20 | 21527 | |
dee91e82 | 21528 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
21529 | ofs.offset = die->offset; |
21530 | ofs.type = type; | |
dee91e82 DE |
21531 | slot = (struct dwarf2_per_cu_offset_and_type **) |
21532 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
21533 | if (*slot) |
21534 | complaint (&symfile_complaints, | |
21535 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 21536 | die->offset.sect_off); |
673bfd45 | 21537 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 21538 | **slot = ofs; |
f792889a | 21539 | return type; |
1c379e20 DJ |
21540 | } |
21541 | ||
02142a6c DE |
21542 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
21543 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
21544 | |
21545 | static struct type * | |
b64f50a1 | 21546 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 21547 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 21548 | { |
dee91e82 | 21549 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 21550 | |
dee91e82 | 21551 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 21552 | return NULL; |
1c379e20 | 21553 | |
dee91e82 | 21554 | ofs.per_cu = per_cu; |
673bfd45 | 21555 | ofs.offset = offset; |
dee91e82 | 21556 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
21557 | if (slot) |
21558 | return slot->type; | |
21559 | else | |
21560 | return NULL; | |
21561 | } | |
21562 | ||
02142a6c | 21563 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
21564 | or return NULL if DIE does not have a saved type. */ |
21565 | ||
21566 | static struct type * | |
21567 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
21568 | { | |
21569 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
21570 | } | |
21571 | ||
10b3939b DJ |
21572 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
21573 | ||
21574 | static void | |
21575 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
21576 | struct dwarf2_per_cu_data *ref_per_cu) | |
21577 | { | |
21578 | void **slot; | |
21579 | ||
21580 | if (cu->dependencies == NULL) | |
21581 | cu->dependencies | |
21582 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
21583 | NULL, &cu->comp_unit_obstack, | |
21584 | hashtab_obstack_allocate, | |
21585 | dummy_obstack_deallocate); | |
21586 | ||
21587 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
21588 | if (*slot == NULL) | |
21589 | *slot = ref_per_cu; | |
21590 | } | |
1c379e20 | 21591 | |
f504f079 DE |
21592 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
21593 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
21594 | cache that we must keep because we are keeping CU. */ |
21595 | ||
10b3939b DJ |
21596 | static int |
21597 | dwarf2_mark_helper (void **slot, void *data) | |
21598 | { | |
21599 | struct dwarf2_per_cu_data *per_cu; | |
21600 | ||
21601 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
21602 | |
21603 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
21604 | reading of the chain. As such dependencies remain valid it is not much | |
21605 | useful to track and undo them during QUIT cleanups. */ | |
21606 | if (per_cu->cu == NULL) | |
21607 | return 1; | |
21608 | ||
10b3939b DJ |
21609 | if (per_cu->cu->mark) |
21610 | return 1; | |
21611 | per_cu->cu->mark = 1; | |
21612 | ||
21613 | if (per_cu->cu->dependencies != NULL) | |
21614 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
21615 | ||
21616 | return 1; | |
21617 | } | |
21618 | ||
f504f079 DE |
21619 | /* Set the mark field in CU and in every other compilation unit in the |
21620 | cache that we must keep because we are keeping CU. */ | |
21621 | ||
ae038cb0 DJ |
21622 | static void |
21623 | dwarf2_mark (struct dwarf2_cu *cu) | |
21624 | { | |
21625 | if (cu->mark) | |
21626 | return; | |
21627 | cu->mark = 1; | |
10b3939b DJ |
21628 | if (cu->dependencies != NULL) |
21629 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
21630 | } |
21631 | ||
21632 | static void | |
21633 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
21634 | { | |
21635 | while (per_cu) | |
21636 | { | |
21637 | per_cu->cu->mark = 0; | |
21638 | per_cu = per_cu->cu->read_in_chain; | |
21639 | } | |
72bf9492 DJ |
21640 | } |
21641 | ||
72bf9492 DJ |
21642 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
21643 | is its offset in .debug_info for this objfile. */ | |
21644 | ||
21645 | static hashval_t | |
21646 | partial_die_hash (const void *item) | |
21647 | { | |
21648 | const struct partial_die_info *part_die = item; | |
9a619af0 | 21649 | |
b64f50a1 | 21650 | return part_die->offset.sect_off; |
72bf9492 DJ |
21651 | } |
21652 | ||
21653 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
21654 | are equal if they have the same offset. */ | |
21655 | ||
21656 | static int | |
21657 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
21658 | { | |
21659 | const struct partial_die_info *part_die_lhs = item_lhs; | |
21660 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 21661 | |
b64f50a1 | 21662 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
21663 | } |
21664 | ||
ae038cb0 DJ |
21665 | static struct cmd_list_element *set_dwarf2_cmdlist; |
21666 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
21667 | ||
21668 | static void | |
21669 | set_dwarf2_cmd (char *args, int from_tty) | |
21670 | { | |
21671 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
21672 | } | |
21673 | ||
21674 | static void | |
21675 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 21676 | { |
ae038cb0 DJ |
21677 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
21678 | } | |
21679 | ||
4bf44c1c | 21680 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
21681 | |
21682 | static void | |
c1bd65d0 | 21683 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
21684 | { |
21685 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 21686 | int ix; |
8b70b953 | 21687 | |
626f2d1c TT |
21688 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
21689 | cleaning up. */ | |
21690 | dwarf2_per_objfile = NULL; | |
21691 | ||
59b0c7c1 JB |
21692 | for (ix = 0; ix < data->n_comp_units; ++ix) |
21693 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 21694 | |
59b0c7c1 | 21695 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 21696 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
21697 | data->all_type_units[ix]->per_cu.imported_symtabs); |
21698 | xfree (data->all_type_units); | |
95554aad | 21699 | |
8b70b953 | 21700 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
21701 | |
21702 | if (data->dwo_files) | |
21703 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
21704 | if (data->dwp_file) |
21705 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
21706 | |
21707 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
21708 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
21709 | } |
21710 | ||
21711 | \f | |
ae2de4f8 | 21712 | /* The "save gdb-index" command. */ |
9291a0cd TT |
21713 | |
21714 | /* The contents of the hash table we create when building the string | |
21715 | table. */ | |
21716 | struct strtab_entry | |
21717 | { | |
21718 | offset_type offset; | |
21719 | const char *str; | |
21720 | }; | |
21721 | ||
559a7a62 JK |
21722 | /* Hash function for a strtab_entry. |
21723 | ||
21724 | Function is used only during write_hash_table so no index format backward | |
21725 | compatibility is needed. */ | |
b89be57b | 21726 | |
9291a0cd TT |
21727 | static hashval_t |
21728 | hash_strtab_entry (const void *e) | |
21729 | { | |
21730 | const struct strtab_entry *entry = e; | |
559a7a62 | 21731 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
21732 | } |
21733 | ||
21734 | /* Equality function for a strtab_entry. */ | |
b89be57b | 21735 | |
9291a0cd TT |
21736 | static int |
21737 | eq_strtab_entry (const void *a, const void *b) | |
21738 | { | |
21739 | const struct strtab_entry *ea = a; | |
21740 | const struct strtab_entry *eb = b; | |
21741 | return !strcmp (ea->str, eb->str); | |
21742 | } | |
21743 | ||
21744 | /* Create a strtab_entry hash table. */ | |
b89be57b | 21745 | |
9291a0cd TT |
21746 | static htab_t |
21747 | create_strtab (void) | |
21748 | { | |
21749 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
21750 | xfree, xcalloc, xfree); | |
21751 | } | |
21752 | ||
21753 | /* Add a string to the constant pool. Return the string's offset in | |
21754 | host order. */ | |
b89be57b | 21755 | |
9291a0cd TT |
21756 | static offset_type |
21757 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
21758 | { | |
21759 | void **slot; | |
21760 | struct strtab_entry entry; | |
21761 | struct strtab_entry *result; | |
21762 | ||
21763 | entry.str = str; | |
21764 | slot = htab_find_slot (table, &entry, INSERT); | |
21765 | if (*slot) | |
21766 | result = *slot; | |
21767 | else | |
21768 | { | |
21769 | result = XNEW (struct strtab_entry); | |
21770 | result->offset = obstack_object_size (cpool); | |
21771 | result->str = str; | |
21772 | obstack_grow_str0 (cpool, str); | |
21773 | *slot = result; | |
21774 | } | |
21775 | return result->offset; | |
21776 | } | |
21777 | ||
21778 | /* An entry in the symbol table. */ | |
21779 | struct symtab_index_entry | |
21780 | { | |
21781 | /* The name of the symbol. */ | |
21782 | const char *name; | |
21783 | /* The offset of the name in the constant pool. */ | |
21784 | offset_type index_offset; | |
21785 | /* A sorted vector of the indices of all the CUs that hold an object | |
21786 | of this name. */ | |
21787 | VEC (offset_type) *cu_indices; | |
21788 | }; | |
21789 | ||
21790 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
21791 | struct mapped_symtab | |
21792 | { | |
21793 | offset_type n_elements; | |
21794 | offset_type size; | |
21795 | struct symtab_index_entry **data; | |
21796 | }; | |
21797 | ||
21798 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 21799 | |
9291a0cd TT |
21800 | static hashval_t |
21801 | hash_symtab_entry (const void *e) | |
21802 | { | |
21803 | const struct symtab_index_entry *entry = e; | |
21804 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
21805 | sizeof (offset_type) * VEC_length (offset_type, | |
21806 | entry->cu_indices), | |
21807 | 0); | |
21808 | } | |
21809 | ||
21810 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 21811 | |
9291a0cd TT |
21812 | static int |
21813 | eq_symtab_entry (const void *a, const void *b) | |
21814 | { | |
21815 | const struct symtab_index_entry *ea = a; | |
21816 | const struct symtab_index_entry *eb = b; | |
21817 | int len = VEC_length (offset_type, ea->cu_indices); | |
21818 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
21819 | return 0; | |
21820 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
21821 | VEC_address (offset_type, eb->cu_indices), | |
21822 | sizeof (offset_type) * len); | |
21823 | } | |
21824 | ||
21825 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 21826 | |
9291a0cd TT |
21827 | static void |
21828 | delete_symtab_entry (void *p) | |
21829 | { | |
21830 | struct symtab_index_entry *entry = p; | |
21831 | VEC_free (offset_type, entry->cu_indices); | |
21832 | xfree (entry); | |
21833 | } | |
21834 | ||
21835 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 21836 | |
9291a0cd | 21837 | static htab_t |
3876f04e | 21838 | create_symbol_hash_table (void) |
9291a0cd TT |
21839 | { |
21840 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
21841 | delete_symtab_entry, xcalloc, xfree); | |
21842 | } | |
21843 | ||
21844 | /* Create a new mapped symtab object. */ | |
b89be57b | 21845 | |
9291a0cd TT |
21846 | static struct mapped_symtab * |
21847 | create_mapped_symtab (void) | |
21848 | { | |
21849 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
21850 | symtab->n_elements = 0; | |
21851 | symtab->size = 1024; | |
21852 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
21853 | return symtab; | |
21854 | } | |
21855 | ||
21856 | /* Destroy a mapped_symtab. */ | |
b89be57b | 21857 | |
9291a0cd TT |
21858 | static void |
21859 | cleanup_mapped_symtab (void *p) | |
21860 | { | |
21861 | struct mapped_symtab *symtab = p; | |
21862 | /* The contents of the array are freed when the other hash table is | |
21863 | destroyed. */ | |
21864 | xfree (symtab->data); | |
21865 | xfree (symtab); | |
21866 | } | |
21867 | ||
21868 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
21869 | the slot. |
21870 | ||
21871 | Function is used only during write_hash_table so no index format backward | |
21872 | compatibility is needed. */ | |
b89be57b | 21873 | |
9291a0cd TT |
21874 | static struct symtab_index_entry ** |
21875 | find_slot (struct mapped_symtab *symtab, const char *name) | |
21876 | { | |
559a7a62 | 21877 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
21878 | |
21879 | index = hash & (symtab->size - 1); | |
21880 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
21881 | ||
21882 | for (;;) | |
21883 | { | |
21884 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
21885 | return &symtab->data[index]; | |
21886 | index = (index + step) & (symtab->size - 1); | |
21887 | } | |
21888 | } | |
21889 | ||
21890 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 21891 | |
9291a0cd TT |
21892 | static void |
21893 | hash_expand (struct mapped_symtab *symtab) | |
21894 | { | |
21895 | offset_type old_size = symtab->size; | |
21896 | offset_type i; | |
21897 | struct symtab_index_entry **old_entries = symtab->data; | |
21898 | ||
21899 | symtab->size *= 2; | |
21900 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
21901 | ||
21902 | for (i = 0; i < old_size; ++i) | |
21903 | { | |
21904 | if (old_entries[i]) | |
21905 | { | |
21906 | struct symtab_index_entry **slot = find_slot (symtab, | |
21907 | old_entries[i]->name); | |
21908 | *slot = old_entries[i]; | |
21909 | } | |
21910 | } | |
21911 | ||
21912 | xfree (old_entries); | |
21913 | } | |
21914 | ||
156942c7 DE |
21915 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
21916 | CU_INDEX is the index of the CU in which the symbol appears. | |
21917 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 21918 | |
9291a0cd TT |
21919 | static void |
21920 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 21921 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
21922 | offset_type cu_index) |
21923 | { | |
21924 | struct symtab_index_entry **slot; | |
156942c7 | 21925 | offset_type cu_index_and_attrs; |
9291a0cd TT |
21926 | |
21927 | ++symtab->n_elements; | |
21928 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
21929 | hash_expand (symtab); | |
21930 | ||
21931 | slot = find_slot (symtab, name); | |
21932 | if (!*slot) | |
21933 | { | |
21934 | *slot = XNEW (struct symtab_index_entry); | |
21935 | (*slot)->name = name; | |
156942c7 | 21936 | /* index_offset is set later. */ |
9291a0cd TT |
21937 | (*slot)->cu_indices = NULL; |
21938 | } | |
156942c7 DE |
21939 | |
21940 | cu_index_and_attrs = 0; | |
21941 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
21942 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
21943 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
21944 | ||
21945 | /* We don't want to record an index value twice as we want to avoid the | |
21946 | duplication. | |
21947 | We process all global symbols and then all static symbols | |
21948 | (which would allow us to avoid the duplication by only having to check | |
21949 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
21950 | To keep things simple we don't worry about the duplication here and | |
21951 | sort and uniqufy the list after we've processed all symbols. */ | |
21952 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
21953 | } | |
21954 | ||
21955 | /* qsort helper routine for uniquify_cu_indices. */ | |
21956 | ||
21957 | static int | |
21958 | offset_type_compare (const void *ap, const void *bp) | |
21959 | { | |
21960 | offset_type a = *(offset_type *) ap; | |
21961 | offset_type b = *(offset_type *) bp; | |
21962 | ||
21963 | return (a > b) - (b > a); | |
21964 | } | |
21965 | ||
21966 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
21967 | ||
21968 | static void | |
21969 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
21970 | { | |
21971 | int i; | |
21972 | ||
21973 | for (i = 0; i < symtab->size; ++i) | |
21974 | { | |
21975 | struct symtab_index_entry *entry = symtab->data[i]; | |
21976 | ||
21977 | if (entry | |
21978 | && entry->cu_indices != NULL) | |
21979 | { | |
21980 | unsigned int next_to_insert, next_to_check; | |
21981 | offset_type last_value; | |
21982 | ||
21983 | qsort (VEC_address (offset_type, entry->cu_indices), | |
21984 | VEC_length (offset_type, entry->cu_indices), | |
21985 | sizeof (offset_type), offset_type_compare); | |
21986 | ||
21987 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
21988 | next_to_insert = 1; | |
21989 | for (next_to_check = 1; | |
21990 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
21991 | ++next_to_check) | |
21992 | { | |
21993 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
21994 | != last_value) | |
21995 | { | |
21996 | last_value = VEC_index (offset_type, entry->cu_indices, | |
21997 | next_to_check); | |
21998 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
21999 | last_value); | |
22000 | ++next_to_insert; | |
22001 | } | |
22002 | } | |
22003 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
22004 | } | |
22005 | } | |
9291a0cd TT |
22006 | } |
22007 | ||
22008 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 22009 | |
9291a0cd | 22010 | static offset_type |
3876f04e | 22011 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
22012 | struct symtab_index_entry *entry) |
22013 | { | |
22014 | void **slot; | |
22015 | ||
3876f04e | 22016 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
22017 | if (!*slot) |
22018 | { | |
22019 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
22020 | offset_type val = MAYBE_SWAP (len); | |
22021 | offset_type iter; | |
22022 | int i; | |
22023 | ||
22024 | *slot = entry; | |
22025 | entry->index_offset = obstack_object_size (cpool); | |
22026 | ||
22027 | obstack_grow (cpool, &val, sizeof (val)); | |
22028 | for (i = 0; | |
22029 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
22030 | ++i) | |
22031 | { | |
22032 | val = MAYBE_SWAP (iter); | |
22033 | obstack_grow (cpool, &val, sizeof (val)); | |
22034 | } | |
22035 | } | |
22036 | else | |
22037 | { | |
22038 | struct symtab_index_entry *old_entry = *slot; | |
22039 | entry->index_offset = old_entry->index_offset; | |
22040 | entry = old_entry; | |
22041 | } | |
22042 | return entry->index_offset; | |
22043 | } | |
22044 | ||
22045 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
22046 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 22047 | |
9291a0cd TT |
22048 | static void |
22049 | write_hash_table (struct mapped_symtab *symtab, | |
22050 | struct obstack *output, struct obstack *cpool) | |
22051 | { | |
22052 | offset_type i; | |
3876f04e | 22053 | htab_t symbol_hash_table; |
9291a0cd TT |
22054 | htab_t str_table; |
22055 | ||
3876f04e | 22056 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 22057 | str_table = create_strtab (); |
3876f04e | 22058 | |
9291a0cd TT |
22059 | /* We add all the index vectors to the constant pool first, to |
22060 | ensure alignment is ok. */ | |
22061 | for (i = 0; i < symtab->size; ++i) | |
22062 | { | |
22063 | if (symtab->data[i]) | |
3876f04e | 22064 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
22065 | } |
22066 | ||
22067 | /* Now write out the hash table. */ | |
22068 | for (i = 0; i < symtab->size; ++i) | |
22069 | { | |
22070 | offset_type str_off, vec_off; | |
22071 | ||
22072 | if (symtab->data[i]) | |
22073 | { | |
22074 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
22075 | vec_off = symtab->data[i]->index_offset; | |
22076 | } | |
22077 | else | |
22078 | { | |
22079 | /* While 0 is a valid constant pool index, it is not valid | |
22080 | to have 0 for both offsets. */ | |
22081 | str_off = 0; | |
22082 | vec_off = 0; | |
22083 | } | |
22084 | ||
22085 | str_off = MAYBE_SWAP (str_off); | |
22086 | vec_off = MAYBE_SWAP (vec_off); | |
22087 | ||
22088 | obstack_grow (output, &str_off, sizeof (str_off)); | |
22089 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
22090 | } | |
22091 | ||
22092 | htab_delete (str_table); | |
3876f04e | 22093 | htab_delete (symbol_hash_table); |
9291a0cd TT |
22094 | } |
22095 | ||
0a5429f6 DE |
22096 | /* Struct to map psymtab to CU index in the index file. */ |
22097 | struct psymtab_cu_index_map | |
22098 | { | |
22099 | struct partial_symtab *psymtab; | |
22100 | unsigned int cu_index; | |
22101 | }; | |
22102 | ||
22103 | static hashval_t | |
22104 | hash_psymtab_cu_index (const void *item) | |
22105 | { | |
22106 | const struct psymtab_cu_index_map *map = item; | |
22107 | ||
22108 | return htab_hash_pointer (map->psymtab); | |
22109 | } | |
22110 | ||
22111 | static int | |
22112 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
22113 | { | |
22114 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
22115 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
22116 | ||
22117 | return lhs->psymtab == rhs->psymtab; | |
22118 | } | |
22119 | ||
22120 | /* Helper struct for building the address table. */ | |
22121 | struct addrmap_index_data | |
22122 | { | |
22123 | struct objfile *objfile; | |
22124 | struct obstack *addr_obstack; | |
22125 | htab_t cu_index_htab; | |
22126 | ||
22127 | /* Non-zero if the previous_* fields are valid. | |
22128 | We can't write an entry until we see the next entry (since it is only then | |
22129 | that we know the end of the entry). */ | |
22130 | int previous_valid; | |
22131 | /* Index of the CU in the table of all CUs in the index file. */ | |
22132 | unsigned int previous_cu_index; | |
0963b4bd | 22133 | /* Start address of the CU. */ |
0a5429f6 DE |
22134 | CORE_ADDR previous_cu_start; |
22135 | }; | |
22136 | ||
22137 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 22138 | |
9291a0cd | 22139 | static void |
0a5429f6 DE |
22140 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
22141 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 22142 | { |
0a5429f6 | 22143 | offset_type cu_index_to_write; |
948f8e3d | 22144 | gdb_byte addr[8]; |
9291a0cd TT |
22145 | CORE_ADDR baseaddr; |
22146 | ||
22147 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22148 | ||
0a5429f6 DE |
22149 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
22150 | obstack_grow (obstack, addr, 8); | |
22151 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
22152 | obstack_grow (obstack, addr, 8); | |
22153 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
22154 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
22155 | } | |
22156 | ||
22157 | /* Worker function for traversing an addrmap to build the address table. */ | |
22158 | ||
22159 | static int | |
22160 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
22161 | { | |
22162 | struct addrmap_index_data *data = datap; | |
22163 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
22164 | |
22165 | if (data->previous_valid) | |
22166 | add_address_entry (data->objfile, data->addr_obstack, | |
22167 | data->previous_cu_start, start_addr, | |
22168 | data->previous_cu_index); | |
22169 | ||
22170 | data->previous_cu_start = start_addr; | |
22171 | if (pst != NULL) | |
22172 | { | |
22173 | struct psymtab_cu_index_map find_map, *map; | |
22174 | find_map.psymtab = pst; | |
22175 | map = htab_find (data->cu_index_htab, &find_map); | |
22176 | gdb_assert (map != NULL); | |
22177 | data->previous_cu_index = map->cu_index; | |
22178 | data->previous_valid = 1; | |
22179 | } | |
22180 | else | |
22181 | data->previous_valid = 0; | |
22182 | ||
22183 | return 0; | |
22184 | } | |
22185 | ||
22186 | /* Write OBJFILE's address map to OBSTACK. | |
22187 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
22188 | in the index file. */ | |
22189 | ||
22190 | static void | |
22191 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
22192 | htab_t cu_index_htab) | |
22193 | { | |
22194 | struct addrmap_index_data addrmap_index_data; | |
22195 | ||
22196 | /* When writing the address table, we have to cope with the fact that | |
22197 | the addrmap iterator only provides the start of a region; we have to | |
22198 | wait until the next invocation to get the start of the next region. */ | |
22199 | ||
22200 | addrmap_index_data.objfile = objfile; | |
22201 | addrmap_index_data.addr_obstack = obstack; | |
22202 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
22203 | addrmap_index_data.previous_valid = 0; | |
22204 | ||
22205 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
22206 | &addrmap_index_data); | |
22207 | ||
22208 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
22209 | is valid, but we should still handle it. | |
22210 | The end address is recorded as the start of the next region, but that | |
22211 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
22212 | anyway. */ | |
22213 | if (addrmap_index_data.previous_valid) | |
22214 | add_address_entry (objfile, obstack, | |
22215 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
22216 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
22217 | } |
22218 | ||
156942c7 DE |
22219 | /* Return the symbol kind of PSYM. */ |
22220 | ||
22221 | static gdb_index_symbol_kind | |
22222 | symbol_kind (struct partial_symbol *psym) | |
22223 | { | |
22224 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
22225 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
22226 | ||
22227 | switch (domain) | |
22228 | { | |
22229 | case VAR_DOMAIN: | |
22230 | switch (aclass) | |
22231 | { | |
22232 | case LOC_BLOCK: | |
22233 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
22234 | case LOC_TYPEDEF: | |
22235 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
22236 | case LOC_COMPUTED: | |
22237 | case LOC_CONST_BYTES: | |
22238 | case LOC_OPTIMIZED_OUT: | |
22239 | case LOC_STATIC: | |
22240 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
22241 | case LOC_CONST: | |
22242 | /* Note: It's currently impossible to recognize psyms as enum values | |
22243 | short of reading the type info. For now punt. */ | |
22244 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
22245 | default: | |
22246 | /* There are other LOC_FOO values that one might want to classify | |
22247 | as variables, but dwarf2read.c doesn't currently use them. */ | |
22248 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
22249 | } | |
22250 | case STRUCT_DOMAIN: | |
22251 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
22252 | default: | |
22253 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
22254 | } | |
22255 | } | |
22256 | ||
9291a0cd | 22257 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 22258 | |
9291a0cd TT |
22259 | static void |
22260 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 22261 | htab_t psyms_seen, |
9291a0cd TT |
22262 | struct partial_symbol **psymp, |
22263 | int count, | |
987d643c TT |
22264 | offset_type cu_index, |
22265 | int is_static) | |
9291a0cd TT |
22266 | { |
22267 | for (; count-- > 0; ++psymp) | |
22268 | { | |
156942c7 DE |
22269 | struct partial_symbol *psym = *psymp; |
22270 | void **slot; | |
987d643c | 22271 | |
156942c7 | 22272 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 22273 | error (_("Ada is not currently supported by the index")); |
987d643c | 22274 | |
987d643c | 22275 | /* Only add a given psymbol once. */ |
156942c7 | 22276 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
22277 | if (!*slot) |
22278 | { | |
156942c7 DE |
22279 | gdb_index_symbol_kind kind = symbol_kind (psym); |
22280 | ||
22281 | *slot = psym; | |
22282 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
22283 | is_static, kind, cu_index); | |
987d643c | 22284 | } |
9291a0cd TT |
22285 | } |
22286 | } | |
22287 | ||
22288 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
22289 | exception if there is an error. */ | |
b89be57b | 22290 | |
9291a0cd TT |
22291 | static void |
22292 | write_obstack (FILE *file, struct obstack *obstack) | |
22293 | { | |
22294 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
22295 | file) | |
22296 | != obstack_object_size (obstack)) | |
22297 | error (_("couldn't data write to file")); | |
22298 | } | |
22299 | ||
22300 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 22301 | |
9291a0cd TT |
22302 | static void |
22303 | unlink_if_set (void *p) | |
22304 | { | |
22305 | char **filename = p; | |
22306 | if (*filename) | |
22307 | unlink (*filename); | |
22308 | } | |
22309 | ||
1fd400ff TT |
22310 | /* A helper struct used when iterating over debug_types. */ |
22311 | struct signatured_type_index_data | |
22312 | { | |
22313 | struct objfile *objfile; | |
22314 | struct mapped_symtab *symtab; | |
22315 | struct obstack *types_list; | |
987d643c | 22316 | htab_t psyms_seen; |
1fd400ff TT |
22317 | int cu_index; |
22318 | }; | |
22319 | ||
22320 | /* A helper function that writes a single signatured_type to an | |
22321 | obstack. */ | |
b89be57b | 22322 | |
1fd400ff TT |
22323 | static int |
22324 | write_one_signatured_type (void **slot, void *d) | |
22325 | { | |
22326 | struct signatured_type_index_data *info = d; | |
22327 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
0186c6a7 | 22328 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
22329 | gdb_byte val[8]; |
22330 | ||
22331 | write_psymbols (info->symtab, | |
987d643c | 22332 | info->psyms_seen, |
3e43a32a MS |
22333 | info->objfile->global_psymbols.list |
22334 | + psymtab->globals_offset, | |
987d643c TT |
22335 | psymtab->n_global_syms, info->cu_index, |
22336 | 0); | |
1fd400ff | 22337 | write_psymbols (info->symtab, |
987d643c | 22338 | info->psyms_seen, |
3e43a32a MS |
22339 | info->objfile->static_psymbols.list |
22340 | + psymtab->statics_offset, | |
987d643c TT |
22341 | psymtab->n_static_syms, info->cu_index, |
22342 | 1); | |
1fd400ff | 22343 | |
b64f50a1 JK |
22344 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22345 | entry->per_cu.offset.sect_off); | |
1fd400ff | 22346 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
22347 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22348 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
22349 | obstack_grow (info->types_list, val, 8); |
22350 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
22351 | obstack_grow (info->types_list, val, 8); | |
22352 | ||
22353 | ++info->cu_index; | |
22354 | ||
22355 | return 1; | |
22356 | } | |
22357 | ||
95554aad TT |
22358 | /* Recurse into all "included" dependencies and write their symbols as |
22359 | if they appeared in this psymtab. */ | |
22360 | ||
22361 | static void | |
22362 | recursively_write_psymbols (struct objfile *objfile, | |
22363 | struct partial_symtab *psymtab, | |
22364 | struct mapped_symtab *symtab, | |
22365 | htab_t psyms_seen, | |
22366 | offset_type cu_index) | |
22367 | { | |
22368 | int i; | |
22369 | ||
22370 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
22371 | if (psymtab->dependencies[i]->user != NULL) | |
22372 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
22373 | symtab, psyms_seen, cu_index); | |
22374 | ||
22375 | write_psymbols (symtab, | |
22376 | psyms_seen, | |
22377 | objfile->global_psymbols.list + psymtab->globals_offset, | |
22378 | psymtab->n_global_syms, cu_index, | |
22379 | 0); | |
22380 | write_psymbols (symtab, | |
22381 | psyms_seen, | |
22382 | objfile->static_psymbols.list + psymtab->statics_offset, | |
22383 | psymtab->n_static_syms, cu_index, | |
22384 | 1); | |
22385 | } | |
22386 | ||
9291a0cd | 22387 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 22388 | |
9291a0cd TT |
22389 | static void |
22390 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
22391 | { | |
22392 | struct cleanup *cleanup; | |
22393 | char *filename, *cleanup_filename; | |
1fd400ff TT |
22394 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
22395 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
22396 | int i; |
22397 | FILE *out_file; | |
22398 | struct mapped_symtab *symtab; | |
22399 | offset_type val, size_of_contents, total_len; | |
22400 | struct stat st; | |
987d643c | 22401 | htab_t psyms_seen; |
0a5429f6 DE |
22402 | htab_t cu_index_htab; |
22403 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 22404 | |
9291a0cd TT |
22405 | if (dwarf2_per_objfile->using_index) |
22406 | error (_("Cannot use an index to create the index")); | |
22407 | ||
8b70b953 TT |
22408 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
22409 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
22410 | ||
260b681b DE |
22411 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
22412 | return; | |
22413 | ||
4262abfb JK |
22414 | if (stat (objfile_name (objfile), &st) < 0) |
22415 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 22416 | |
4262abfb | 22417 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
22418 | INDEX_SUFFIX, (char *) NULL); |
22419 | cleanup = make_cleanup (xfree, filename); | |
22420 | ||
614c279d | 22421 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
22422 | if (!out_file) |
22423 | error (_("Can't open `%s' for writing"), filename); | |
22424 | ||
22425 | cleanup_filename = filename; | |
22426 | make_cleanup (unlink_if_set, &cleanup_filename); | |
22427 | ||
22428 | symtab = create_mapped_symtab (); | |
22429 | make_cleanup (cleanup_mapped_symtab, symtab); | |
22430 | ||
22431 | obstack_init (&addr_obstack); | |
22432 | make_cleanup_obstack_free (&addr_obstack); | |
22433 | ||
22434 | obstack_init (&cu_list); | |
22435 | make_cleanup_obstack_free (&cu_list); | |
22436 | ||
1fd400ff TT |
22437 | obstack_init (&types_cu_list); |
22438 | make_cleanup_obstack_free (&types_cu_list); | |
22439 | ||
987d643c TT |
22440 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
22441 | NULL, xcalloc, xfree); | |
96408a79 | 22442 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 22443 | |
0a5429f6 DE |
22444 | /* While we're scanning CU's create a table that maps a psymtab pointer |
22445 | (which is what addrmap records) to its index (which is what is recorded | |
22446 | in the index file). This will later be needed to write the address | |
22447 | table. */ | |
22448 | cu_index_htab = htab_create_alloc (100, | |
22449 | hash_psymtab_cu_index, | |
22450 | eq_psymtab_cu_index, | |
22451 | NULL, xcalloc, xfree); | |
96408a79 | 22452 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
22453 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
22454 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
22455 | * dwarf2_per_objfile->n_comp_units); | |
22456 | make_cleanup (xfree, psymtab_cu_index_map); | |
22457 | ||
22458 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
22459 | work here. Also, the debug_types entries do not appear in |
22460 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
22461 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
22462 | { | |
3e43a32a MS |
22463 | struct dwarf2_per_cu_data *per_cu |
22464 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 22465 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 22466 | gdb_byte val[8]; |
0a5429f6 DE |
22467 | struct psymtab_cu_index_map *map; |
22468 | void **slot; | |
9291a0cd | 22469 | |
92fac807 JK |
22470 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
22471 | It may be referenced from a local scope but in such case it does not | |
22472 | need to be present in .gdb_index. */ | |
22473 | if (psymtab == NULL) | |
22474 | continue; | |
22475 | ||
95554aad TT |
22476 | if (psymtab->user == NULL) |
22477 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 22478 | |
0a5429f6 DE |
22479 | map = &psymtab_cu_index_map[i]; |
22480 | map->psymtab = psymtab; | |
22481 | map->cu_index = i; | |
22482 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
22483 | gdb_assert (slot != NULL); | |
22484 | gdb_assert (*slot == NULL); | |
22485 | *slot = map; | |
9291a0cd | 22486 | |
b64f50a1 JK |
22487 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
22488 | per_cu->offset.sect_off); | |
9291a0cd | 22489 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 22490 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
22491 | obstack_grow (&cu_list, val, 8); |
22492 | } | |
22493 | ||
0a5429f6 DE |
22494 | /* Dump the address map. */ |
22495 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
22496 | ||
1fd400ff TT |
22497 | /* Write out the .debug_type entries, if any. */ |
22498 | if (dwarf2_per_objfile->signatured_types) | |
22499 | { | |
22500 | struct signatured_type_index_data sig_data; | |
22501 | ||
22502 | sig_data.objfile = objfile; | |
22503 | sig_data.symtab = symtab; | |
22504 | sig_data.types_list = &types_cu_list; | |
987d643c | 22505 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
22506 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
22507 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
22508 | write_one_signatured_type, &sig_data); | |
22509 | } | |
22510 | ||
156942c7 DE |
22511 | /* Now that we've processed all symbols we can shrink their cu_indices |
22512 | lists. */ | |
22513 | uniquify_cu_indices (symtab); | |
22514 | ||
9291a0cd TT |
22515 | obstack_init (&constant_pool); |
22516 | make_cleanup_obstack_free (&constant_pool); | |
22517 | obstack_init (&symtab_obstack); | |
22518 | make_cleanup_obstack_free (&symtab_obstack); | |
22519 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
22520 | ||
22521 | obstack_init (&contents); | |
22522 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 22523 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
22524 | total_len = size_of_contents; |
22525 | ||
22526 | /* The version number. */ | |
796a7ff8 | 22527 | val = MAYBE_SWAP (8); |
9291a0cd TT |
22528 | obstack_grow (&contents, &val, sizeof (val)); |
22529 | ||
22530 | /* The offset of the CU list from the start of the file. */ | |
22531 | val = MAYBE_SWAP (total_len); | |
22532 | obstack_grow (&contents, &val, sizeof (val)); | |
22533 | total_len += obstack_object_size (&cu_list); | |
22534 | ||
1fd400ff TT |
22535 | /* The offset of the types CU list from the start of the file. */ |
22536 | val = MAYBE_SWAP (total_len); | |
22537 | obstack_grow (&contents, &val, sizeof (val)); | |
22538 | total_len += obstack_object_size (&types_cu_list); | |
22539 | ||
9291a0cd TT |
22540 | /* The offset of the address table from the start of the file. */ |
22541 | val = MAYBE_SWAP (total_len); | |
22542 | obstack_grow (&contents, &val, sizeof (val)); | |
22543 | total_len += obstack_object_size (&addr_obstack); | |
22544 | ||
22545 | /* The offset of the symbol table from the start of the file. */ | |
22546 | val = MAYBE_SWAP (total_len); | |
22547 | obstack_grow (&contents, &val, sizeof (val)); | |
22548 | total_len += obstack_object_size (&symtab_obstack); | |
22549 | ||
22550 | /* The offset of the constant pool from the start of the file. */ | |
22551 | val = MAYBE_SWAP (total_len); | |
22552 | obstack_grow (&contents, &val, sizeof (val)); | |
22553 | total_len += obstack_object_size (&constant_pool); | |
22554 | ||
22555 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
22556 | ||
22557 | write_obstack (out_file, &contents); | |
22558 | write_obstack (out_file, &cu_list); | |
1fd400ff | 22559 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
22560 | write_obstack (out_file, &addr_obstack); |
22561 | write_obstack (out_file, &symtab_obstack); | |
22562 | write_obstack (out_file, &constant_pool); | |
22563 | ||
22564 | fclose (out_file); | |
22565 | ||
22566 | /* We want to keep the file, so we set cleanup_filename to NULL | |
22567 | here. See unlink_if_set. */ | |
22568 | cleanup_filename = NULL; | |
22569 | ||
22570 | do_cleanups (cleanup); | |
22571 | } | |
22572 | ||
90476074 TT |
22573 | /* Implementation of the `save gdb-index' command. |
22574 | ||
22575 | Note that the file format used by this command is documented in the | |
22576 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 22577 | |
9291a0cd TT |
22578 | static void |
22579 | save_gdb_index_command (char *arg, int from_tty) | |
22580 | { | |
22581 | struct objfile *objfile; | |
22582 | ||
22583 | if (!arg || !*arg) | |
96d19272 | 22584 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
22585 | |
22586 | ALL_OBJFILES (objfile) | |
22587 | { | |
22588 | struct stat st; | |
22589 | ||
22590 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 22591 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
22592 | continue; |
22593 | ||
22594 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
22595 | if (dwarf2_per_objfile) | |
22596 | { | |
22597 | volatile struct gdb_exception except; | |
22598 | ||
22599 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
22600 | { | |
22601 | write_psymtabs_to_index (objfile, arg); | |
22602 | } | |
22603 | if (except.reason < 0) | |
22604 | exception_fprintf (gdb_stderr, except, | |
22605 | _("Error while writing index for `%s': "), | |
4262abfb | 22606 | objfile_name (objfile)); |
9291a0cd TT |
22607 | } |
22608 | } | |
dce234bc PP |
22609 | } |
22610 | ||
9291a0cd TT |
22611 | \f |
22612 | ||
9eae7c52 TT |
22613 | int dwarf2_always_disassemble; |
22614 | ||
22615 | static void | |
22616 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
22617 | struct cmd_list_element *c, const char *value) | |
22618 | { | |
3e43a32a MS |
22619 | fprintf_filtered (file, |
22620 | _("Whether to always disassemble " | |
22621 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
22622 | value); |
22623 | } | |
22624 | ||
900e11f9 JK |
22625 | static void |
22626 | show_check_physname (struct ui_file *file, int from_tty, | |
22627 | struct cmd_list_element *c, const char *value) | |
22628 | { | |
22629 | fprintf_filtered (file, | |
22630 | _("Whether to check \"physname\" is %s.\n"), | |
22631 | value); | |
22632 | } | |
22633 | ||
6502dd73 DJ |
22634 | void _initialize_dwarf2_read (void); |
22635 | ||
22636 | void | |
22637 | _initialize_dwarf2_read (void) | |
22638 | { | |
96d19272 JK |
22639 | struct cmd_list_element *c; |
22640 | ||
dce234bc | 22641 | dwarf2_objfile_data_key |
c1bd65d0 | 22642 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 22643 | |
1bedd215 AC |
22644 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
22645 | Set DWARF 2 specific variables.\n\ | |
22646 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
22647 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
22648 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
22649 | ||
1bedd215 AC |
22650 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
22651 | Show DWARF 2 specific variables\n\ | |
22652 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
22653 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
22654 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
22655 | ||
22656 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
22657 | &dwarf2_max_cache_age, _("\ |
22658 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
22659 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
22660 | A higher limit means that cached compilation units will be stored\n\ | |
22661 | in memory longer, and more total memory will be used. Zero disables\n\ | |
22662 | caching, which can slow down startup."), | |
2c5b56ce | 22663 | NULL, |
920d2a44 | 22664 | show_dwarf2_max_cache_age, |
2c5b56ce | 22665 | &set_dwarf2_cmdlist, |
ae038cb0 | 22666 | &show_dwarf2_cmdlist); |
d97bc12b | 22667 | |
9eae7c52 TT |
22668 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
22669 | &dwarf2_always_disassemble, _("\ | |
22670 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
22671 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
22672 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
22673 | syntax. When disabled, expressions will be printed in a more\n\ | |
22674 | conversational style, when possible."), | |
22675 | NULL, | |
22676 | show_dwarf2_always_disassemble, | |
22677 | &set_dwarf2_cmdlist, | |
22678 | &show_dwarf2_cmdlist); | |
22679 | ||
73be47f5 | 22680 | add_setshow_zuinteger_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
45cfd468 DE |
22681 | Set debugging of the dwarf2 reader."), _("\ |
22682 | Show debugging of the dwarf2 reader."), _("\ | |
73be47f5 DE |
22683 | When enabled (non-zero), debugging messages are printed during dwarf2\n\ |
22684 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
22685 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
22686 | NULL, |
22687 | NULL, | |
22688 | &setdebuglist, &showdebuglist); | |
22689 | ||
ccce17b0 | 22690 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
22691 | Set debugging of the dwarf2 DIE reader."), _("\ |
22692 | Show debugging of the dwarf2 DIE reader."), _("\ | |
22693 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
22694 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
22695 | NULL, |
22696 | NULL, | |
22697 | &setdebuglist, &showdebuglist); | |
9291a0cd | 22698 | |
900e11f9 JK |
22699 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
22700 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
22701 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
22702 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
22703 | the demangler."), | |
22704 | NULL, show_check_physname, | |
22705 | &setdebuglist, &showdebuglist); | |
22706 | ||
e615022a DE |
22707 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
22708 | no_class, &use_deprecated_index_sections, _("\ | |
22709 | Set whether to use deprecated gdb_index sections."), _("\ | |
22710 | Show whether to use deprecated gdb_index sections."), _("\ | |
22711 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
22712 | Normally they are ignored either because of a missing feature or\n\ | |
22713 | performance issue.\n\ | |
22714 | Warning: This option must be enabled before gdb reads the file."), | |
22715 | NULL, | |
22716 | NULL, | |
22717 | &setlist, &showlist); | |
22718 | ||
96d19272 | 22719 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 22720 | _("\ |
fc1a9d6e | 22721 | Save a gdb-index file.\n\ |
11570e71 | 22722 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
22723 | &save_cmdlist); |
22724 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
22725 | |
22726 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
22727 | &dwarf2_locexpr_funcs); | |
22728 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
22729 | &dwarf2_loclist_funcs); | |
22730 | ||
22731 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
22732 | &dwarf2_block_frame_base_locexpr_funcs); | |
22733 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
22734 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 22735 | } |