Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
42a4f53d | 3 | Copyright (C) 1992-2019 Free Software Foundation, Inc. |
af5f3db6 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support, using pieces from other GDB modules. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | /* This file contains support routines for creating, manipulating, and | |
0df8b418 | 23 | destroying objfile structures. */ |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "bfd.h" /* Binary File Description */ | |
27 | #include "symtab.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "target.h" | |
af5f3db6 | 32 | #include "bcache.h" |
9bdcbae7 DJ |
33 | #include "expression.h" |
34 | #include "parser-defs.h" | |
35 | ||
c906108c | 36 | #include <sys/types.h> |
53ce3c39 | 37 | #include <sys/stat.h> |
c906108c | 38 | #include <fcntl.h> |
04ea0df1 | 39 | #include "gdb_obstack.h" |
2de7ced7 | 40 | #include "hashtab.h" |
c906108c | 41 | |
7a292a7a | 42 | #include "breakpoint.h" |
fe898f56 | 43 | #include "block.h" |
de4f826b | 44 | #include "dictionary.h" |
cb5d864f | 45 | #include "source.h" |
801e3a5b | 46 | #include "addrmap.h" |
5e2b427d | 47 | #include "arch-utils.h" |
30510692 | 48 | #include "exec.h" |
76727919 | 49 | #include "observable.h" |
6fbf07cd | 50 | #include "complaints.h" |
ccefe4c4 | 51 | #include "psymtab.h" |
0133421a | 52 | #include "solist.h" |
cbb099e8 | 53 | #include "gdb_bfd.h" |
afedecd3 | 54 | #include "btrace.h" |
268a13a5 | 55 | #include "gdbsupport/pathstuff.h" |
7a292a7a | 56 | |
cfe826d4 TT |
57 | #include <vector> |
58 | ||
8e260fc0 TT |
59 | /* Keep a registry of per-objfile data-pointers required by other GDB |
60 | modules. */ | |
c906108c | 61 | |
6b81941e | 62 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 63 | |
c906108c | 64 | /* Externally visible variables that are owned by this module. |
0df8b418 | 65 | See declarations in objfile.h for more info. */ |
c906108c | 66 | |
6c95b8df PA |
67 | struct objfile_pspace_info |
68 | { | |
f6aa7436 TT |
69 | objfile_pspace_info () = default; |
70 | ~objfile_pspace_info (); | |
71 | ||
72 | struct obj_section **sections = nullptr; | |
73 | int num_sections = 0; | |
607ece04 GB |
74 | |
75 | /* Nonzero if object files have been added since the section map | |
76 | was last updated. */ | |
f6aa7436 | 77 | int new_objfiles_available = 0; |
607ece04 GB |
78 | |
79 | /* Nonzero if the section map MUST be updated before use. */ | |
f6aa7436 | 80 | int section_map_dirty = 0; |
607ece04 GB |
81 | |
82 | /* Nonzero if section map updates should be inhibited if possible. */ | |
f6aa7436 | 83 | int inhibit_updates = 0; |
6c95b8df PA |
84 | }; |
85 | ||
86 | /* Per-program-space data key. */ | |
f6aa7436 TT |
87 | static const struct program_space_key<objfile_pspace_info> |
88 | objfiles_pspace_data; | |
6c95b8df | 89 | |
f6aa7436 | 90 | objfile_pspace_info::~objfile_pspace_info () |
6c95b8df | 91 | { |
f6aa7436 | 92 | xfree (sections); |
6c95b8df PA |
93 | } |
94 | ||
95 | /* Get the current svr4 data. If none is found yet, add it now. This | |
96 | function always returns a valid object. */ | |
97 | ||
98 | static struct objfile_pspace_info * | |
99 | get_objfile_pspace_data (struct program_space *pspace) | |
100 | { | |
101 | struct objfile_pspace_info *info; | |
102 | ||
f6aa7436 | 103 | info = objfiles_pspace_data.get (pspace); |
6c95b8df | 104 | if (info == NULL) |
f6aa7436 | 105 | info = objfiles_pspace_data.emplace (pspace); |
6c95b8df PA |
106 | |
107 | return info; | |
108 | } | |
109 | ||
706e3705 TT |
110 | \f |
111 | ||
112 | /* Per-BFD data key. */ | |
113 | ||
f6aa7436 | 114 | static const struct bfd_key<objfile_per_bfd_storage> objfiles_bfd_data; |
706e3705 | 115 | |
d6797f46 TT |
116 | objfile_per_bfd_storage::~objfile_per_bfd_storage () |
117 | { | |
d6797f46 TT |
118 | } |
119 | ||
706e3705 TT |
120 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not |
121 | NULL, and it already has a per-BFD storage object, use that. | |
d6797f46 TT |
122 | Otherwise, allocate a new per-BFD storage object. Note that it is |
123 | not safe to call this multiple times for a given OBJFILE -- it can | |
124 | only be called when allocating or re-initializing OBJFILE. */ | |
706e3705 TT |
125 | |
126 | static struct objfile_per_bfd_storage * | |
127 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
128 | { | |
129 | struct objfile_per_bfd_storage *storage = NULL; | |
130 | ||
131 | if (abfd != NULL) | |
f6aa7436 | 132 | storage = objfiles_bfd_data.get (abfd); |
706e3705 TT |
133 | |
134 | if (storage == NULL) | |
135 | { | |
d6797f46 | 136 | storage = new objfile_per_bfd_storage; |
1da77581 TT |
137 | /* If the object requires gdb to do relocations, we simply fall |
138 | back to not sharing data across users. These cases are rare | |
139 | enough that this seems reasonable. */ | |
140 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
f6aa7436 | 141 | objfiles_bfd_data.set (abfd, storage); |
706e3705 | 142 | |
1da77581 TT |
143 | /* Look up the gdbarch associated with the BFD. */ |
144 | if (abfd != NULL) | |
145 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
706e3705 TT |
146 | } |
147 | ||
148 | return storage; | |
149 | } | |
150 | ||
706e3705 TT |
151 | /* See objfiles.h. */ |
152 | ||
153 | void | |
154 | set_objfile_per_bfd (struct objfile *objfile) | |
155 | { | |
156 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
157 | } | |
158 | ||
3d548a53 TT |
159 | /* Set the objfile's per-BFD notion of the "main" name and |
160 | language. */ | |
161 | ||
162 | void | |
163 | set_objfile_main_name (struct objfile *objfile, | |
164 | const char *name, enum language lang) | |
165 | { | |
166 | if (objfile->per_bfd->name_of_main == NULL | |
167 | || strcmp (objfile->per_bfd->name_of_main, name) != 0) | |
168 | objfile->per_bfd->name_of_main | |
224c3ddb SM |
169 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, name, |
170 | strlen (name)); | |
3d548a53 TT |
171 | objfile->per_bfd->language_of_main = lang; |
172 | } | |
173 | ||
63e43d3a PMR |
174 | /* Helper structure to map blocks to static link properties in hash tables. */ |
175 | ||
176 | struct static_link_htab_entry | |
177 | { | |
178 | const struct block *block; | |
179 | const struct dynamic_prop *static_link; | |
180 | }; | |
181 | ||
182 | /* Return a hash code for struct static_link_htab_entry *P. */ | |
183 | ||
184 | static hashval_t | |
185 | static_link_htab_entry_hash (const void *p) | |
186 | { | |
187 | const struct static_link_htab_entry *e | |
188 | = (const struct static_link_htab_entry *) p; | |
189 | ||
190 | return htab_hash_pointer (e->block); | |
191 | } | |
192 | ||
193 | /* Return whether P1 an P2 (pointers to struct static_link_htab_entry) are | |
194 | mappings for the same block. */ | |
195 | ||
196 | static int | |
197 | static_link_htab_entry_eq (const void *p1, const void *p2) | |
198 | { | |
199 | const struct static_link_htab_entry *e1 | |
200 | = (const struct static_link_htab_entry *) p1; | |
201 | const struct static_link_htab_entry *e2 | |
202 | = (const struct static_link_htab_entry *) p2; | |
203 | ||
204 | return e1->block == e2->block; | |
205 | } | |
206 | ||
207 | /* Register STATIC_LINK as the static link for BLOCK, which is part of OBJFILE. | |
208 | Must not be called more than once for each BLOCK. */ | |
209 | ||
210 | void | |
211 | objfile_register_static_link (struct objfile *objfile, | |
212 | const struct block *block, | |
213 | const struct dynamic_prop *static_link) | |
214 | { | |
215 | void **slot; | |
216 | struct static_link_htab_entry lookup_entry; | |
217 | struct static_link_htab_entry *entry; | |
218 | ||
219 | if (objfile->static_links == NULL) | |
cf250e36 | 220 | objfile->static_links.reset (htab_create_alloc |
63e43d3a | 221 | (1, &static_link_htab_entry_hash, static_link_htab_entry_eq, NULL, |
cf250e36 | 222 | xcalloc, xfree)); |
63e43d3a PMR |
223 | |
224 | /* Create a slot for the mapping, make sure it's the first mapping for this | |
225 | block and then create the mapping itself. */ | |
226 | lookup_entry.block = block; | |
cf250e36 | 227 | slot = htab_find_slot (objfile->static_links.get (), &lookup_entry, INSERT); |
63e43d3a PMR |
228 | gdb_assert (*slot == NULL); |
229 | ||
e39db4db | 230 | entry = XOBNEW (&objfile->objfile_obstack, static_link_htab_entry); |
63e43d3a PMR |
231 | entry->block = block; |
232 | entry->static_link = static_link; | |
233 | *slot = (void *) entry; | |
234 | } | |
235 | ||
236 | /* Look for a static link for BLOCK, which is part of OBJFILE. Return NULL if | |
237 | none was found. */ | |
238 | ||
239 | const struct dynamic_prop * | |
240 | objfile_lookup_static_link (struct objfile *objfile, | |
241 | const struct block *block) | |
242 | { | |
243 | struct static_link_htab_entry *entry; | |
244 | struct static_link_htab_entry lookup_entry; | |
245 | ||
246 | if (objfile->static_links == NULL) | |
247 | return NULL; | |
248 | lookup_entry.block = block; | |
cf250e36 TT |
249 | entry = ((struct static_link_htab_entry *) |
250 | htab_find (objfile->static_links.get (), &lookup_entry)); | |
63e43d3a PMR |
251 | if (entry == NULL) |
252 | return NULL; | |
253 | ||
254 | gdb_assert (entry->block == block); | |
255 | return entry->static_link; | |
256 | } | |
257 | ||
706e3705 TT |
258 | \f |
259 | ||
96baa820 JM |
260 | /* Called via bfd_map_over_sections to build up the section table that |
261 | the objfile references. The objfile contains pointers to the start | |
262 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 263 | the end of the table (objfile->sections_end). */ |
96baa820 | 264 | |
65cf3563 TT |
265 | static void |
266 | add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect, | |
267 | struct objfile *objfile, int force) | |
268 | { | |
269 | struct obj_section *section; | |
270 | ||
271 | if (!force) | |
272 | { | |
273 | flagword aflag; | |
274 | ||
275 | aflag = bfd_get_section_flags (abfd, asect); | |
276 | if (!(aflag & SEC_ALLOC)) | |
277 | return; | |
278 | } | |
279 | ||
280 | section = &objfile->sections[gdb_bfd_section_index (abfd, asect)]; | |
281 | section->objfile = objfile; | |
282 | section->the_bfd_section = asect; | |
283 | section->ovly_mapped = 0; | |
284 | } | |
285 | ||
c906108c | 286 | static void |
7be0c536 | 287 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 288 | void *objfilep) |
c906108c | 289 | { |
19ba03f4 | 290 | add_to_objfile_sections_full (abfd, asect, (struct objfile *) objfilep, 0); |
c906108c SS |
291 | } |
292 | ||
293 | /* Builds a section table for OBJFILE. | |
96baa820 | 294 | |
65cf3563 TT |
295 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
296 | initialized to zero. */ | |
c906108c | 297 | |
d82ea6a8 | 298 | void |
fba45db2 | 299 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 300 | { |
65cf3563 TT |
301 | int count = gdb_bfd_count_sections (objfile->obfd); |
302 | ||
303 | objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
304 | count, | |
305 | struct obj_section); | |
306 | objfile->sections_end = (objfile->sections + count); | |
f1f6aadf PA |
307 | bfd_map_over_sections (objfile->obfd, |
308 | add_to_objfile_sections, (void *) objfile); | |
65cf3563 TT |
309 | |
310 | /* See gdb_bfd_section_index. */ | |
311 | add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1); | |
312 | add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1); | |
313 | add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1); | |
314 | add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1); | |
c906108c SS |
315 | } |
316 | ||
9e86da07 TT |
317 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits, |
318 | initialize the new objfile as best we can and link it into the list | |
319 | of all known objfiles. | |
c906108c | 320 | |
24ba069a JK |
321 | NAME should contain original non-canonicalized filename or other |
322 | identifier as entered by user. If there is no better source use | |
323 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
324 | NAME content is copied into returned objfile. | |
325 | ||
2df3850c | 326 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 327 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 328 | simply copied through to the new objfile flags member. */ |
c906108c | 329 | |
9e86da07 TT |
330 | objfile::objfile (bfd *abfd, const char *name, objfile_flags flags_) |
331 | : flags (flags_), | |
332 | pspace (current_program_space), | |
8d7bcccb | 333 | partial_symtabs (new psymtab_storage ()), |
d320c2b5 | 334 | obfd (abfd) |
c906108c | 335 | { |
14278e1f | 336 | const char *expanded_name; |
c906108c | 337 | |
2f6e5d7e TG |
338 | /* We could use obstack_specify_allocation here instead, but |
339 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
9e86da07 | 340 | obstack_init (&objfile_obstack); |
c906108c | 341 | |
9e86da07 | 342 | objfile_alloc_data (this); |
0d0e1a63 | 343 | |
e3e41d58 | 344 | gdb::unique_xmalloc_ptr<char> name_holder; |
24ba069a JK |
345 | if (name == NULL) |
346 | { | |
347 | gdb_assert (abfd == NULL); | |
40135bb1 | 348 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
e3e41d58 | 349 | expanded_name = "<<anonymous objfile>>"; |
24ba069a | 350 | } |
5fbae7d1 GB |
351 | else if ((flags & OBJF_NOT_FILENAME) != 0 |
352 | || is_target_filename (name)) | |
e3e41d58 | 353 | expanded_name = name; |
04affae3 | 354 | else |
e3e41d58 TT |
355 | { |
356 | name_holder = gdb_abspath (name); | |
357 | expanded_name = name_holder.get (); | |
358 | } | |
9e86da07 TT |
359 | original_name |
360 | = (char *) obstack_copy0 (&objfile_obstack, | |
224c3ddb SM |
361 | expanded_name, |
362 | strlen (expanded_name)); | |
04affae3 | 363 | |
d3e81981 DE |
364 | /* Update the per-objfile information that comes from the bfd, ensuring |
365 | that any data that is reference is saved in the per-objfile data | |
366 | region. */ | |
367 | ||
8ac244b4 | 368 | gdb_bfd_ref (abfd); |
c906108c SS |
369 | if (abfd != NULL) |
370 | { | |
9e86da07 | 371 | mtime = bfd_get_mtime (abfd); |
c906108c SS |
372 | |
373 | /* Build section table. */ | |
9e86da07 | 374 | build_objfile_section_table (this); |
c906108c SS |
375 | } |
376 | ||
9e86da07 | 377 | per_bfd = get_objfile_bfd_data (this, abfd); |
34643a32 | 378 | |
0df8b418 | 379 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 380 | |
c906108c | 381 | if (object_files == NULL) |
9e86da07 | 382 | object_files = this; |
c906108c SS |
383 | else |
384 | { | |
2f6e5d7e TG |
385 | struct objfile *last_one; |
386 | ||
c906108c | 387 | for (last_one = object_files; |
c5aa993b JM |
388 | last_one->next; |
389 | last_one = last_one->next); | |
9e86da07 | 390 | last_one->next = this; |
c906108c SS |
391 | } |
392 | ||
6c95b8df | 393 | /* Rebuild section map next time we need it. */ |
9e86da07 | 394 | get_objfile_pspace_data (pspace)->new_objfiles_available = 1; |
c906108c SS |
395 | } |
396 | ||
5e2b427d | 397 | /* Retrieve the gdbarch associated with OBJFILE. */ |
9c1877ea | 398 | |
5e2b427d | 399 | struct gdbarch * |
9c1877ea | 400 | get_objfile_arch (const struct objfile *objfile) |
5e2b427d | 401 | { |
df6d5441 | 402 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
403 | } |
404 | ||
abd0a5fa JK |
405 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
406 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 407 | |
abd0a5fa JK |
408 | int |
409 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 410 | { |
6ef55de7 | 411 | if (symfile_objfile == NULL || !symfile_objfile->per_bfd->ei.entry_point_p) |
3612b192 DJ |
412 | return 0; |
413 | ||
6ef55de7 | 414 | *entry_p = (symfile_objfile->per_bfd->ei.entry_point |
53eddfa6 | 415 | + ANOFFSET (symfile_objfile->section_offsets, |
6ef55de7 | 416 | symfile_objfile->per_bfd->ei.the_bfd_section_index)); |
3612b192 | 417 | |
abd0a5fa JK |
418 | return 1; |
419 | } | |
420 | ||
421 | /* Get current entry point address. Call error if it is not known. */ | |
422 | ||
423 | CORE_ADDR | |
424 | entry_point_address (void) | |
425 | { | |
426 | CORE_ADDR retval; | |
427 | ||
428 | if (!entry_point_address_query (&retval)) | |
429 | error (_("Entry point address is not known.")); | |
430 | ||
431 | return retval; | |
9ab9195f | 432 | } |
15831452 | 433 | |
e9ad22ee TT |
434 | separate_debug_iterator & |
435 | separate_debug_iterator::operator++ () | |
15d123c9 | 436 | { |
e9ad22ee TT |
437 | gdb_assert (m_objfile != nullptr); |
438 | ||
15d123c9 TG |
439 | struct objfile *res; |
440 | ||
399f313b | 441 | /* If any, return the first child. */ |
e9ad22ee TT |
442 | res = m_objfile->separate_debug_objfile; |
443 | if (res != nullptr) | |
444 | { | |
445 | m_objfile = res; | |
446 | return *this; | |
447 | } | |
15d123c9 | 448 | |
15d123c9 | 449 | /* Common case where there is no separate debug objfile. */ |
e9ad22ee TT |
450 | if (m_objfile == m_parent) |
451 | { | |
452 | m_objfile = nullptr; | |
453 | return *this; | |
454 | } | |
15d123c9 | 455 | |
399f313b TG |
456 | /* Return the brother if any. Note that we don't iterate on brothers of |
457 | the parents. */ | |
e9ad22ee TT |
458 | res = m_objfile->separate_debug_objfile_link; |
459 | if (res != nullptr) | |
460 | { | |
461 | m_objfile = res; | |
462 | return *this; | |
463 | } | |
399f313b | 464 | |
e9ad22ee TT |
465 | for (res = m_objfile->separate_debug_objfile_backlink; |
466 | res != m_parent; | |
15d123c9 TG |
467 | res = res->separate_debug_objfile_backlink) |
468 | { | |
e9ad22ee TT |
469 | gdb_assert (res != nullptr); |
470 | if (res->separate_debug_objfile_link != nullptr) | |
471 | { | |
472 | m_objfile = res->separate_debug_objfile_link; | |
473 | return *this; | |
474 | } | |
15d123c9 | 475 | } |
e9ad22ee TT |
476 | m_objfile = nullptr; |
477 | return *this; | |
15d123c9 | 478 | } |
15831452 | 479 | |
5b5d99cf JB |
480 | /* Put one object file before a specified on in the global list. |
481 | This can be used to make sure an object file is destroyed before | |
7e955d83 | 482 | another when using objfiles_safe to free all objfiles. */ |
5b5d99cf JB |
483 | void |
484 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
485 | { | |
486 | struct objfile **objp; | |
487 | ||
488 | unlink_objfile (objfile); | |
489 | ||
490 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
491 | { | |
492 | if (*objp == before_this) | |
493 | { | |
494 | objfile->next = *objp; | |
495 | *objp = objfile; | |
496 | return; | |
497 | } | |
498 | } | |
499 | ||
500 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 501 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
502 | } |
503 | ||
c906108c SS |
504 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
505 | list. | |
506 | ||
507 | It is not a bug, or error, to call this function if OBJFILE is not known | |
508 | to be in the current list. This is done in the case of mapped objfiles, | |
509 | for example, just to ensure that the mapped objfile doesn't appear twice | |
510 | in the list. Since the list is threaded, linking in a mapped objfile | |
511 | twice would create a circular list. | |
512 | ||
513 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
514 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 515 | between the OBJFILE and the list. */ |
c906108c SS |
516 | |
517 | void | |
fba45db2 | 518 | unlink_objfile (struct objfile *objfile) |
c906108c | 519 | { |
c5aa993b | 520 | struct objfile **objpp; |
c906108c | 521 | |
c5aa993b | 522 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 523 | { |
c5aa993b | 524 | if (*objpp == objfile) |
c906108c | 525 | { |
c5aa993b JM |
526 | *objpp = (*objpp)->next; |
527 | objfile->next = NULL; | |
07cd4b97 | 528 | return; |
c906108c SS |
529 | } |
530 | } | |
07cd4b97 | 531 | |
8e65ff28 | 532 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 533 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
534 | } |
535 | ||
15d123c9 TG |
536 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
537 | ||
538 | void | |
539 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
540 | { | |
541 | gdb_assert (objfile && parent); | |
542 | ||
543 | /* Must not be already in a list. */ | |
544 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
545 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
546 | gdb_assert (objfile->separate_debug_objfile == NULL); |
547 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
548 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
549 | |
550 | objfile->separate_debug_objfile_backlink = parent; | |
551 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
552 | parent->separate_debug_objfile = objfile; | |
553 | ||
554 | /* Put the separate debug object before the normal one, this is so that | |
7e955d83 | 555 | usage of objfiles_safe will stay safe. */ |
15d123c9 TG |
556 | put_objfile_before (objfile, parent); |
557 | } | |
558 | ||
559 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
560 | itself. */ | |
561 | ||
562 | void | |
563 | free_objfile_separate_debug (struct objfile *objfile) | |
564 | { | |
565 | struct objfile *child; | |
566 | ||
567 | for (child = objfile->separate_debug_objfile; child;) | |
568 | { | |
569 | struct objfile *next_child = child->separate_debug_objfile_link; | |
9e86da07 | 570 | delete child; |
15d123c9 TG |
571 | child = next_child; |
572 | } | |
573 | } | |
c906108c | 574 | |
7580e917 | 575 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c | 576 | |
9e86da07 | 577 | objfile::~objfile () |
c906108c | 578 | { |
63644780 | 579 | /* First notify observers that this objfile is about to be freed. */ |
76727919 | 580 | gdb::observers::free_objfile.notify (this); |
63644780 | 581 | |
15d123c9 | 582 | /* Free all separate debug objfiles. */ |
9e86da07 | 583 | free_objfile_separate_debug (this); |
15d123c9 | 584 | |
9e86da07 | 585 | if (separate_debug_objfile_backlink) |
5b5d99cf JB |
586 | { |
587 | /* We freed the separate debug file, make sure the base objfile | |
588 | doesn't reference it. */ | |
15d123c9 TG |
589 | struct objfile *child; |
590 | ||
9e86da07 | 591 | child = separate_debug_objfile_backlink->separate_debug_objfile; |
15d123c9 | 592 | |
9e86da07 | 593 | if (child == this) |
15d123c9 | 594 | { |
9e86da07 TT |
595 | /* THIS is the first child. */ |
596 | separate_debug_objfile_backlink->separate_debug_objfile = | |
597 | separate_debug_objfile_link; | |
15d123c9 TG |
598 | } |
599 | else | |
600 | { | |
9e86da07 | 601 | /* Find THIS in the list. */ |
15d123c9 TG |
602 | while (1) |
603 | { | |
9e86da07 | 604 | if (child->separate_debug_objfile_link == this) |
15d123c9 TG |
605 | { |
606 | child->separate_debug_objfile_link = | |
9e86da07 | 607 | separate_debug_objfile_link; |
15d123c9 TG |
608 | break; |
609 | } | |
610 | child = child->separate_debug_objfile_link; | |
611 | gdb_assert (child); | |
612 | } | |
613 | } | |
5b5d99cf | 614 | } |
9e86da07 | 615 | |
ae5a43e0 DJ |
616 | /* Remove any references to this objfile in the global value |
617 | lists. */ | |
9e86da07 | 618 | preserve_values (this); |
ae5a43e0 | 619 | |
9f743ef6 JK |
620 | /* It still may reference data modules have associated with the objfile and |
621 | the symbol file data. */ | |
9e86da07 | 622 | forget_cached_source_info_for_objfile (this); |
9f743ef6 | 623 | |
9e86da07 TT |
624 | breakpoint_free_objfile (this); |
625 | btrace_free_objfile (this); | |
2f202fde | 626 | |
c906108c SS |
627 | /* First do any symbol file specific actions required when we are |
628 | finished with a particular symbol file. Note that if the objfile | |
629 | is using reusable symbol information (via mmalloc) then each of | |
630 | these routines is responsible for doing the correct thing, either | |
631 | freeing things which are valid only during this particular gdb | |
0df8b418 | 632 | execution, or leaving them to be reused during the next one. */ |
c906108c | 633 | |
9e86da07 TT |
634 | if (sf != NULL) |
635 | (*sf->sym_finish) (this); | |
c906108c | 636 | |
9f743ef6 | 637 | /* Discard any data modules have associated with the objfile. The function |
9e86da07 TT |
638 | still may reference obfd. */ |
639 | objfile_free_data (this); | |
c5bc3a77 | 640 | |
9e86da07 TT |
641 | if (obfd) |
642 | gdb_bfd_unref (obfd); | |
706e3705 | 643 | else |
d6797f46 | 644 | delete per_bfd; |
c906108c | 645 | |
0df8b418 | 646 | /* Remove it from the chain of all objfiles. */ |
c906108c | 647 | |
9e86da07 | 648 | unlink_objfile (this); |
c906108c | 649 | |
9e86da07 | 650 | if (this == symfile_objfile) |
adb7f338 | 651 | symfile_objfile = NULL; |
c906108c | 652 | |
c906108c SS |
653 | /* Before the symbol table code was redone to make it easier to |
654 | selectively load and remove information particular to a specific | |
655 | linkage unit, gdb used to do these things whenever the monolithic | |
656 | symbol table was blown away. How much still needs to be done | |
657 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 658 | it is shown to be no longer needed. */ |
c5aa993b | 659 | |
cb5d864f FF |
660 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
661 | for example), so we need to call this here. */ | |
c906108c SS |
662 | clear_pc_function_cache (); |
663 | ||
cb5d864f | 664 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 665 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
666 | |
667 | { | |
668 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 669 | |
9e86da07 | 670 | if (cursal.symtab && SYMTAB_OBJFILE (cursal.symtab) == this) |
00174a86 | 671 | clear_current_source_symtab_and_line (); |
cb5d864f FF |
672 | } |
673 | ||
0df8b418 | 674 | /* Free the obstacks for non-reusable objfiles. */ |
9e86da07 | 675 | obstack_free (&objfile_obstack, 0); |
6c95b8df PA |
676 | |
677 | /* Rebuild section map next time we need it. */ | |
9e86da07 | 678 | get_objfile_pspace_data (pspace)->section_map_dirty = 1; |
c906108c SS |
679 | } |
680 | ||
c906108c SS |
681 | /* Free all the object files at once and clean up their users. */ |
682 | ||
683 | void | |
fba45db2 | 684 | free_all_objfiles (void) |
c906108c | 685 | { |
0133421a JK |
686 | struct so_list *so; |
687 | ||
ee371134 | 688 | /* Any objfile reference would become stale. */ |
0133421a JK |
689 | for (so = master_so_list (); so; so = so->next) |
690 | gdb_assert (so->objfile == NULL); | |
c906108c | 691 | |
7e955d83 | 692 | for (objfile *objfile : current_program_space->objfiles_safe ()) |
9e86da07 | 693 | delete objfile; |
c1e56572 | 694 | clear_symtab_users (0); |
c906108c SS |
695 | } |
696 | \f | |
34eaf542 TT |
697 | /* A helper function for objfile_relocate1 that relocates a single |
698 | symbol. */ | |
699 | ||
700 | static void | |
701 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
702 | struct section_offsets *delta) | |
703 | { | |
704 | fixup_symbol_section (sym, objfile); | |
705 | ||
706 | /* The RS6000 code from which this was taken skipped | |
707 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
708 | But I'm leaving out that test, on the theory that | |
709 | they can't possibly pass the tests below. */ | |
710 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
711 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
712 | && SYMBOL_SECTION (sym) >= 0) | |
713 | { | |
714 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
715 | } | |
716 | } | |
717 | ||
c906108c | 718 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
719 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
720 | Return non-zero iff any change happened. */ | |
567995e1 | 721 | |
b260e109 | 722 | static int |
5cc80db3 | 723 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 724 | const struct section_offsets *new_offsets) |
c906108c | 725 | { |
d4f3574e | 726 | struct section_offsets *delta = |
a39a16c4 MM |
727 | ((struct section_offsets *) |
728 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 729 | |
5cc80db3 MS |
730 | int something_changed = 0; |
731 | ||
b926417a | 732 | for (int i = 0; i < objfile->num_sections; ++i) |
5cc80db3 MS |
733 | { |
734 | delta->offsets[i] = | |
735 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
736 | if (ANOFFSET (delta, i) != 0) | |
737 | something_changed = 1; | |
738 | } | |
739 | if (!something_changed) | |
740 | return 0; | |
c906108c SS |
741 | |
742 | /* OK, get all the symtabs. */ | |
743 | { | |
b669c953 | 744 | for (compunit_symtab *cust : objfile->compunits ()) |
d5da8b3c TT |
745 | { |
746 | for (symtab *s : compunit_filetabs (cust)) | |
747 | { | |
748 | struct linetable *l; | |
749 | ||
750 | /* First the line table. */ | |
751 | l = SYMTAB_LINETABLE (s); | |
752 | if (l) | |
753 | { | |
754 | for (int i = 0; i < l->nitems; ++i) | |
755 | l->item[i].pc += ANOFFSET (delta, | |
756 | COMPUNIT_BLOCK_LINE_SECTION | |
757 | (cust)); | |
758 | } | |
759 | } | |
760 | } | |
c906108c | 761 | |
b669c953 | 762 | for (compunit_symtab *cust : objfile->compunits ()) |
592553c4 TT |
763 | { |
764 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (cust); | |
765 | int block_line_section = COMPUNIT_BLOCK_LINE_SECTION (cust); | |
766 | ||
767 | if (BLOCKVECTOR_MAP (bv)) | |
768 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
769 | ANOFFSET (delta, block_line_section)); | |
770 | ||
771 | for (int i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
772 | { | |
773 | struct block *b; | |
774 | struct symbol *sym; | |
b026f593 | 775 | struct mdict_iterator miter; |
592553c4 TT |
776 | |
777 | b = BLOCKVECTOR_BLOCK (bv, i); | |
778 | BLOCK_START (b) += ANOFFSET (delta, block_line_section); | |
779 | BLOCK_END (b) += ANOFFSET (delta, block_line_section); | |
780 | ||
781 | if (BLOCK_RANGES (b) != nullptr) | |
782 | for (int j = 0; j < BLOCK_NRANGES (b); j++) | |
783 | { | |
784 | BLOCK_RANGE_START (b, j) | |
785 | += ANOFFSET (delta, block_line_section); | |
786 | BLOCK_RANGE_END (b, j) += ANOFFSET (delta, | |
787 | block_line_section); | |
788 | } | |
789 | ||
790 | /* We only want to iterate over the local symbols, not any | |
791 | symbols in included symtabs. */ | |
b026f593 | 792 | ALL_DICT_SYMBOLS (BLOCK_MULTIDICT (b), miter, sym) |
9644dc3a | 793 | { |
592553c4 | 794 | relocate_one_symbol (sym, objfile, delta); |
9644dc3a | 795 | } |
592553c4 TT |
796 | } |
797 | } | |
c906108c SS |
798 | } |
799 | ||
79748972 TT |
800 | /* This stores relocated addresses and so must be cleared. This |
801 | will cause it to be recreated on demand. */ | |
802 | objfile->psymbol_map.clear (); | |
803 | ||
34eaf542 TT |
804 | /* Relocate isolated symbols. */ |
805 | { | |
806 | struct symbol *iter; | |
807 | ||
808 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
809 | relocate_one_symbol (iter, objfile, delta); | |
810 | } | |
811 | ||
f1f2b5f4 PA |
812 | { |
813 | int i; | |
5cc80db3 | 814 | |
f1f2b5f4 PA |
815 | for (i = 0; i < objfile->num_sections; ++i) |
816 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
817 | } | |
818 | ||
819 | /* Rebuild section map next time we need it. */ | |
607ece04 | 820 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 821 | |
30510692 | 822 | /* Update the table in exec_ops, used to read memory. */ |
b926417a | 823 | struct obj_section *s; |
30510692 DJ |
824 | ALL_OBJFILE_OSECTIONS (objfile, s) |
825 | { | |
65cf3563 | 826 | int idx = s - objfile->sections; |
30510692 DJ |
827 | |
828 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 829 | obj_section_addr (s)); |
30510692 | 830 | } |
b260e109 JK |
831 | |
832 | /* Data changed. */ | |
833 | return 1; | |
567995e1 JK |
834 | } |
835 | ||
836 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
837 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
838 | ||
839 | The number and ordering of sections does differ between the two objfiles. | |
840 | Only their names match. Also the file offsets will differ (objfile being | |
841 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
842 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
843 | files. */ | |
844 | ||
845 | void | |
3189cb12 DE |
846 | objfile_relocate (struct objfile *objfile, |
847 | const struct section_offsets *new_offsets) | |
567995e1 | 848 | { |
b260e109 | 849 | int changed = 0; |
567995e1 | 850 | |
b260e109 | 851 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 | 852 | |
bde09ab7 | 853 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
567995e1 | 854 | { |
e9ad22ee TT |
855 | if (debug_objfile == objfile) |
856 | continue; | |
857 | ||
37e136b1 TT |
858 | section_addr_info objfile_addrs |
859 | = build_section_addr_info_from_objfile (objfile); | |
567995e1 JK |
860 | |
861 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
862 | relative ones must be already created according to debug_objfile. */ | |
863 | ||
37e136b1 | 864 | addr_info_make_relative (&objfile_addrs, debug_objfile->obfd); |
567995e1 JK |
865 | |
866 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 867 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
cfe826d4 TT |
868 | std::vector<struct section_offsets> |
869 | new_debug_offsets (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
870 | relative_addr_info_to_section_offsets (new_debug_offsets.data (), | |
567995e1 JK |
871 | debug_objfile->num_sections, |
872 | objfile_addrs); | |
873 | ||
cfe826d4 | 874 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets.data ()); |
567995e1 | 875 | } |
30510692 | 876 | |
0df8b418 | 877 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
878 | if (changed) |
879 | breakpoint_re_set (); | |
c906108c | 880 | } |
4141a416 JB |
881 | |
882 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
883 | not touched here. | |
884 | Return non-zero iff any change happened. */ | |
885 | ||
886 | static int | |
887 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
888 | { | |
889 | struct section_offsets *new_offsets = | |
890 | ((struct section_offsets *) | |
891 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
892 | int i; | |
893 | ||
894 | for (i = 0; i < objfile->num_sections; ++i) | |
895 | new_offsets->offsets[i] = slide; | |
896 | ||
897 | return objfile_relocate1 (objfile, new_offsets); | |
898 | } | |
899 | ||
900 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
901 | SEPARATE_DEBUG_OBJFILEs. */ | |
902 | ||
903 | void | |
904 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
905 | { | |
4141a416 JB |
906 | int changed = 0; |
907 | ||
bde09ab7 | 908 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
4141a416 JB |
909 | changed |= objfile_rebase1 (debug_objfile, slide); |
910 | ||
911 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
912 | if (changed) | |
913 | breakpoint_re_set (); | |
914 | } | |
c906108c | 915 | \f |
55333a84 DE |
916 | /* Return non-zero if OBJFILE has partial symbols. */ |
917 | ||
918 | int | |
919 | objfile_has_partial_symbols (struct objfile *objfile) | |
920 | { | |
b11896a5 TT |
921 | if (!objfile->sf) |
922 | return 0; | |
3e03848b JK |
923 | |
924 | /* If we have not read psymbols, but we have a function capable of reading | |
925 | them, then that is an indication that they are in fact available. Without | |
926 | this function the symbols may have been already read in but they also may | |
927 | not be present in this objfile. */ | |
928 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
929 | && objfile->sf->sym_read_psymbols != NULL) | |
930 | return 1; | |
931 | ||
b11896a5 | 932 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
933 | } |
934 | ||
935 | /* Return non-zero if OBJFILE has full symbols. */ | |
936 | ||
937 | int | |
938 | objfile_has_full_symbols (struct objfile *objfile) | |
939 | { | |
43f3e411 | 940 | return objfile->compunit_symtabs != NULL; |
55333a84 DE |
941 | } |
942 | ||
e361b228 | 943 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 944 | or through a separate debug file. */ |
e361b228 TG |
945 | |
946 | int | |
947 | objfile_has_symbols (struct objfile *objfile) | |
948 | { | |
bde09ab7 | 949 | for (::objfile *o : objfile->separate_debug_objfiles ()) |
15d123c9 TG |
950 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) |
951 | return 1; | |
e361b228 TG |
952 | return 0; |
953 | } | |
954 | ||
955 | ||
c906108c SS |
956 | /* Many places in gdb want to test just to see if we have any partial |
957 | symbols available. This function returns zero if none are currently | |
0df8b418 | 958 | available, nonzero otherwise. */ |
c906108c SS |
959 | |
960 | int | |
fba45db2 | 961 | have_partial_symbols (void) |
c906108c | 962 | { |
2030c079 | 963 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
964 | { |
965 | if (objfile_has_partial_symbols (ofp)) | |
966 | return 1; | |
967 | } | |
c906108c SS |
968 | return 0; |
969 | } | |
970 | ||
971 | /* Many places in gdb want to test just to see if we have any full | |
972 | symbols available. This function returns zero if none are currently | |
0df8b418 | 973 | available, nonzero otherwise. */ |
c906108c SS |
974 | |
975 | int | |
fba45db2 | 976 | have_full_symbols (void) |
c906108c | 977 | { |
2030c079 | 978 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
979 | { |
980 | if (objfile_has_full_symbols (ofp)) | |
981 | return 1; | |
982 | } | |
c906108c SS |
983 | return 0; |
984 | } | |
985 | ||
986 | ||
987 | /* This operations deletes all objfile entries that represent solibs that | |
988 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
989 | command. */ |
990 | ||
c906108c | 991 | void |
fba45db2 | 992 | objfile_purge_solibs (void) |
c906108c | 993 | { |
7e955d83 | 994 | for (objfile *objf : current_program_space->objfiles_safe ()) |
cac85af2 TT |
995 | { |
996 | /* We assume that the solib package has been purged already, or will | |
997 | be soon. */ | |
0df8b418 | 998 | |
cac85af2 TT |
999 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
1000 | delete objf; | |
1001 | } | |
c906108c SS |
1002 | } |
1003 | ||
1004 | ||
1005 | /* Many places in gdb want to test just to see if we have any minimal | |
1006 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1007 | available, nonzero otherwise. */ |
c906108c SS |
1008 | |
1009 | int | |
fba45db2 | 1010 | have_minimal_symbols (void) |
c906108c | 1011 | { |
2030c079 | 1012 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
1013 | { |
1014 | if (ofp->per_bfd->minimal_symbol_count > 0) | |
1015 | { | |
1016 | return 1; | |
1017 | } | |
1018 | } | |
c906108c SS |
1019 | return 0; |
1020 | } | |
1021 | ||
a845f5cb PP |
1022 | /* Qsort comparison function. */ |
1023 | ||
1024 | static int | |
1025 | qsort_cmp (const void *a, const void *b) | |
1026 | { | |
1027 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1028 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1029 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1030 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1031 | ||
1032 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1033 | return -1; |
a845f5cb | 1034 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1035 | return 1; |
1036 | else | |
5cc80db3 MS |
1037 | { |
1038 | /* Sections are at the same address. This could happen if | |
1039 | A) we have an objfile and a separate debuginfo. | |
1040 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1041 | or something like that. */ |
5cc80db3 MS |
1042 | |
1043 | const struct objfile *const objfile1 = sect1->objfile; | |
1044 | const struct objfile *const objfile2 = sect2->objfile; | |
1045 | ||
1046 | if (objfile1->separate_debug_objfile == objfile2 | |
1047 | || objfile2->separate_debug_objfile == objfile1) | |
1048 | { | |
1049 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1050 | will be filtered out later. */ | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1056 | triage. This section could be slow (since we iterate over all | |
1057 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1058 | very often (GDB is already in a confused state; one hopes this | |
1059 | doesn't happen at all). If you discover that significant time is | |
1060 | spent in the loops below, do 'set complaints 100' and examine the | |
1061 | resulting complaints. */ | |
1062 | ||
1063 | if (objfile1 == objfile2) | |
1064 | { | |
1065 | /* Both sections came from the same objfile. We are really confused. | |
1066 | Sort on sequence order of sections within the objfile. */ | |
1067 | ||
1068 | const struct obj_section *osect; | |
1069 | ||
1070 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1071 | if (osect == sect1) | |
1072 | return -1; | |
1073 | else if (osect == sect2) | |
1074 | return 1; | |
1075 | ||
1076 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1077 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1078 | } |
1079 | else | |
1080 | { | |
1081 | /* Sort on sequence number of the objfile in the chain. */ | |
1082 | ||
2030c079 | 1083 | for (objfile *objfile : current_program_space->objfiles ()) |
5cc80db3 MS |
1084 | if (objfile == objfile1) |
1085 | return -1; | |
1086 | else if (objfile == objfile2) | |
1087 | return 1; | |
1088 | ||
1089 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1090 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1091 | } |
1092 | } | |
6fbf07cd PP |
1093 | |
1094 | /* Unreachable. */ | |
f3574227 | 1095 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1096 | return 0; |
1097 | } | |
1098 | ||
3aad21cf PP |
1099 | /* Select "better" obj_section to keep. We prefer the one that came from |
1100 | the real object, rather than the one from separate debuginfo. | |
1101 | Most of the time the two sections are exactly identical, but with | |
1102 | prelinking the .rel.dyn section in the real object may have different | |
1103 | size. */ | |
1104 | ||
1105 | static struct obj_section * | |
1106 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1107 | { | |
1108 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1109 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1110 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1111 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1112 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1113 | ||
1114 | if (a->objfile->separate_debug_objfile != NULL) | |
1115 | return a; | |
1116 | return b; | |
1117 | } | |
1118 | ||
6fbf07cd PP |
1119 | /* Return 1 if SECTION should be inserted into the section map. |
1120 | We want to insert only non-overlay and non-TLS section. */ | |
1121 | ||
1122 | static int | |
1123 | insert_section_p (const struct bfd *abfd, | |
1124 | const struct bfd_section *section) | |
1125 | { | |
1126 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1127 | ||
50f8ea94 | 1128 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1129 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1130 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1131 | discarding sections from the "system supplied DSO" (aka vdso) | |
1132 | on some Linux systems (e.g. Fedora 11). */ | |
1133 | return 0; | |
1134 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1135 | /* This is a TLS section. */ | |
1136 | return 0; | |
1137 | ||
1138 | return 1; | |
1139 | } | |
1140 | ||
1141 | /* Filter out overlapping sections where one section came from the real | |
1142 | objfile, and the other from a separate debuginfo file. | |
1143 | Return the size of table after redundant sections have been eliminated. */ | |
1144 | ||
1145 | static int | |
1146 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1147 | { | |
1148 | int i, j; | |
1149 | ||
1150 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1151 | { | |
1152 | struct obj_section *const sect1 = map[i]; | |
1153 | struct obj_section *const sect2 = map[i + 1]; | |
1154 | const struct objfile *const objfile1 = sect1->objfile; | |
1155 | const struct objfile *const objfile2 = sect2->objfile; | |
1156 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1157 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1158 | ||
1159 | if (sect1_addr == sect2_addr | |
1160 | && (objfile1->separate_debug_objfile == objfile2 | |
1161 | || objfile2->separate_debug_objfile == objfile1)) | |
1162 | { | |
1163 | map[j++] = preferred_obj_section (sect1, sect2); | |
1164 | ++i; | |
1165 | } | |
1166 | else | |
1167 | map[j++] = sect1; | |
1168 | } | |
1169 | ||
1170 | if (i < map_size) | |
1171 | { | |
1172 | gdb_assert (i == map_size - 1); | |
1173 | map[j++] = map[i]; | |
1174 | } | |
1175 | ||
1176 | /* The map should not have shrunk to less than half the original size. */ | |
1177 | gdb_assert (map_size / 2 <= j); | |
1178 | ||
1179 | return j; | |
1180 | } | |
1181 | ||
1182 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1183 | Overlapping sections could really be overlay sections which we didn't | |
1184 | classify as such in insert_section_p, or we could be dealing with a | |
1185 | corrupt binary. */ | |
1186 | ||
1187 | static int | |
1188 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1189 | { | |
1190 | int i, j; | |
1191 | ||
1192 | for (i = 0, j = 0; i < map_size - 1; ) | |
1193 | { | |
1194 | int k; | |
1195 | ||
1196 | map[j++] = map[i]; | |
1197 | for (k = i + 1; k < map_size; k++) | |
1198 | { | |
1199 | struct obj_section *const sect1 = map[i]; | |
1200 | struct obj_section *const sect2 = map[k]; | |
1201 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1202 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1203 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1204 | ||
1205 | gdb_assert (sect1_addr <= sect2_addr); | |
1206 | ||
1207 | if (sect1_endaddr <= sect2_addr) | |
1208 | break; | |
1209 | else | |
1210 | { | |
1211 | /* We have an overlap. Report it. */ | |
1212 | ||
1213 | struct objfile *const objf1 = sect1->objfile; | |
1214 | struct objfile *const objf2 = sect2->objfile; | |
1215 | ||
6fbf07cd PP |
1216 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1217 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1218 | ||
1219 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1220 | ||
1221 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1222 | ||
b98664d3 | 1223 | complaint (_("unexpected overlap between:\n" |
6fbf07cd PP |
1224 | " (A) section `%s' from `%s' [%s, %s)\n" |
1225 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1226 | "Will ignore section B"), | |
4262abfb | 1227 | bfd_section_name (abfd1, bfds1), objfile_name (objf1), |
6fbf07cd PP |
1228 | paddress (gdbarch, sect1_addr), |
1229 | paddress (gdbarch, sect1_endaddr), | |
4262abfb | 1230 | bfd_section_name (abfd2, bfds2), objfile_name (objf2), |
6fbf07cd PP |
1231 | paddress (gdbarch, sect2_addr), |
1232 | paddress (gdbarch, sect2_endaddr)); | |
1233 | } | |
1234 | } | |
1235 | i = k; | |
1236 | } | |
1237 | ||
1238 | if (i < map_size) | |
1239 | { | |
1240 | gdb_assert (i == map_size - 1); | |
1241 | map[j++] = map[i]; | |
1242 | } | |
1243 | ||
1244 | return j; | |
1245 | } | |
1246 | ||
1247 | ||
1248 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1249 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1250 | |
1251 | static void | |
6c95b8df PA |
1252 | update_section_map (struct program_space *pspace, |
1253 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1254 | { |
607ece04 | 1255 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1256 | int alloc_size, map_size, i; |
a845f5cb | 1257 | struct obj_section *s, **map; |
a845f5cb | 1258 | |
607ece04 GB |
1259 | pspace_info = get_objfile_pspace_data (pspace); |
1260 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1261 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1262 | |
1263 | map = *pmap; | |
1264 | xfree (map); | |
1265 | ||
6fbf07cd | 1266 | alloc_size = 0; |
2030c079 | 1267 | for (objfile *objfile : pspace->objfiles ()) |
6c95b8df PA |
1268 | ALL_OBJFILE_OSECTIONS (objfile, s) |
1269 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1270 | alloc_size += 1; | |
a845f5cb | 1271 | |
65a97ab3 PP |
1272 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1273 | if (alloc_size == 0) | |
1274 | { | |
1275 | *pmap = NULL; | |
1276 | *pmap_size = 0; | |
1277 | return; | |
1278 | } | |
1279 | ||
8d749320 | 1280 | map = XNEWVEC (struct obj_section *, alloc_size); |
a845f5cb | 1281 | |
3aad21cf | 1282 | i = 0; |
2030c079 | 1283 | for (objfile *objfile : pspace->objfiles ()) |
6c95b8df PA |
1284 | ALL_OBJFILE_OSECTIONS (objfile, s) |
1285 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1286 | map[i++] = s; | |
a845f5cb | 1287 | |
6fbf07cd PP |
1288 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1289 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1290 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1291 | |
6fbf07cd PP |
1292 | if (map_size < alloc_size) |
1293 | /* Some sections were eliminated. Trim excess space. */ | |
224c3ddb | 1294 | map = XRESIZEVEC (struct obj_section *, map, map_size); |
3aad21cf | 1295 | else |
6fbf07cd | 1296 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1297 | |
a845f5cb PP |
1298 | *pmap = map; |
1299 | *pmap_size = map_size; | |
1300 | } | |
1301 | ||
0df8b418 | 1302 | /* Bsearch comparison function. */ |
a845f5cb PP |
1303 | |
1304 | static int | |
1305 | bsearch_cmp (const void *key, const void *elt) | |
1306 | { | |
1307 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1308 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1309 | ||
1310 | if (pc < obj_section_addr (section)) | |
1311 | return -1; | |
1312 | if (pc < obj_section_endaddr (section)) | |
1313 | return 0; | |
1314 | return 1; | |
1315 | } | |
1316 | ||
714835d5 | 1317 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1318 | |
1319 | struct obj_section * | |
714835d5 | 1320 | find_pc_section (CORE_ADDR pc) |
c906108c | 1321 | { |
6c95b8df | 1322 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1323 | struct obj_section *s, **sp; |
c5aa993b | 1324 | |
714835d5 UW |
1325 | /* Check for mapped overlay section first. */ |
1326 | s = find_pc_mapped_section (pc); | |
1327 | if (s) | |
1328 | return s; | |
c906108c | 1329 | |
6c95b8df | 1330 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1331 | if (pspace_info->section_map_dirty |
1332 | || (pspace_info->new_objfiles_available | |
1333 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1334 | { |
6c95b8df PA |
1335 | update_section_map (current_program_space, |
1336 | &pspace_info->sections, | |
1337 | &pspace_info->num_sections); | |
c906108c | 1338 | |
6c95b8df PA |
1339 | /* Don't need updates to section map until objfiles are added, |
1340 | removed or relocated. */ | |
607ece04 GB |
1341 | pspace_info->new_objfiles_available = 0; |
1342 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1343 | } |
1344 | ||
65a97ab3 PP |
1345 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1346 | bsearch be non-NULL. */ | |
1347 | if (pspace_info->sections == NULL) | |
1348 | { | |
1349 | gdb_assert (pspace_info->num_sections == 0); | |
1350 | return NULL; | |
1351 | } | |
1352 | ||
6c95b8df PA |
1353 | sp = (struct obj_section **) bsearch (&pc, |
1354 | pspace_info->sections, | |
1355 | pspace_info->num_sections, | |
1356 | sizeof (*pspace_info->sections), | |
1357 | bsearch_cmp); | |
a845f5cb PP |
1358 | if (sp != NULL) |
1359 | return *sp; | |
714835d5 | 1360 | return NULL; |
c906108c | 1361 | } |
c5aa993b | 1362 | |
c906108c | 1363 | |
3e5d3a5a | 1364 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1365 | |
1366 | int | |
a121b7c1 | 1367 | pc_in_section (CORE_ADDR pc, const char *name) |
c906108c SS |
1368 | { |
1369 | struct obj_section *s; | |
1370 | int retval = 0; | |
c5aa993b JM |
1371 | |
1372 | s = find_pc_section (pc); | |
1373 | ||
c906108c SS |
1374 | retval = (s != NULL |
1375 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1376 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1377 | return (retval); |
c906108c | 1378 | } |
0d0e1a63 MK |
1379 | \f |
1380 | ||
607ece04 | 1381 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1382 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1383 | |
1384 | void | |
bb272892 | 1385 | objfiles_changed (void) |
a845f5cb | 1386 | { |
6c95b8df | 1387 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1388 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1389 | } | |
1390 | ||
1391 | /* See comments in objfiles.h. */ | |
1392 | ||
06424eac | 1393 | scoped_restore_tmpl<int> |
607ece04 GB |
1394 | inhibit_section_map_updates (struct program_space *pspace) |
1395 | { | |
06424eac TT |
1396 | return scoped_restore_tmpl<int> |
1397 | (&get_objfile_pspace_data (pspace)->inhibit_updates, 1); | |
a845f5cb | 1398 | } |
e3c69974 | 1399 | |
63644780 NB |
1400 | /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0 |
1401 | otherwise. */ | |
1402 | ||
1403 | int | |
1404 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) | |
1405 | { | |
1406 | struct obj_section *osect; | |
1407 | ||
1408 | if (objfile == NULL) | |
1409 | return 0; | |
1410 | ||
1411 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1412 | { | |
1413 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1414 | continue; | |
1415 | ||
1416 | if (obj_section_addr (osect) <= addr | |
1417 | && addr < obj_section_endaddr (osect)) | |
1418 | return 1; | |
1419 | } | |
1420 | return 0; | |
1421 | } | |
1422 | ||
08351840 | 1423 | int |
d03de421 PA |
1424 | shared_objfile_contains_address_p (struct program_space *pspace, |
1425 | CORE_ADDR address) | |
08351840 | 1426 | { |
2030c079 | 1427 | for (objfile *objfile : pspace->objfiles ()) |
08351840 | 1428 | { |
d03de421 | 1429 | if ((objfile->flags & OBJF_SHARED) != 0 |
08351840 PA |
1430 | && is_addr_in_objfile (address, objfile)) |
1431 | return 1; | |
1432 | } | |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | ||
19630284 | 1437 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
2030c079 | 1438 | gdbarch method. It is equivalent to use the objfiles iterable, |
19630284 JB |
1439 | searching the objfiles in the order they are stored internally, |
1440 | ignoring CURRENT_OBJFILE. | |
1441 | ||
1442 | On most platorms, it should be close enough to doing the best | |
1443 | we can without some knowledge specific to the architecture. */ | |
1444 | ||
1445 | void | |
1446 | default_iterate_over_objfiles_in_search_order | |
1447 | (struct gdbarch *gdbarch, | |
1448 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1449 | void *cb_data, struct objfile *current_objfile) | |
1450 | { | |
1451 | int stop = 0; | |
19630284 | 1452 | |
2030c079 | 1453 | for (objfile *objfile : current_program_space->objfiles ()) |
19630284 JB |
1454 | { |
1455 | stop = cb (objfile, cb_data); | |
1456 | if (stop) | |
1457 | return; | |
1458 | } | |
1459 | } | |
1460 | ||
e02c96a7 | 1461 | /* See objfiles.h. */ |
4262abfb JK |
1462 | |
1463 | const char * | |
1464 | objfile_name (const struct objfile *objfile) | |
1465 | { | |
24ba069a JK |
1466 | if (objfile->obfd != NULL) |
1467 | return bfd_get_filename (objfile->obfd); | |
1468 | ||
4262abfb JK |
1469 | return objfile->original_name; |
1470 | } | |
1471 | ||
cc485e62 DE |
1472 | /* See objfiles.h. */ |
1473 | ||
e02c96a7 DE |
1474 | const char * |
1475 | objfile_filename (const struct objfile *objfile) | |
1476 | { | |
1477 | if (objfile->obfd != NULL) | |
1478 | return bfd_get_filename (objfile->obfd); | |
1479 | ||
1480 | return NULL; | |
1481 | } | |
1482 | ||
1483 | /* See objfiles.h. */ | |
1484 | ||
cc485e62 DE |
1485 | const char * |
1486 | objfile_debug_name (const struct objfile *objfile) | |
1487 | { | |
1488 | return lbasename (objfile->original_name); | |
1489 | } | |
1490 | ||
015d2e7e DE |
1491 | /* See objfiles.h. */ |
1492 | ||
1493 | const char * | |
1494 | objfile_flavour_name (struct objfile *objfile) | |
1495 | { | |
1496 | if (objfile->obfd != NULL) | |
1497 | return bfd_flavour_name (bfd_get_flavour (objfile->obfd)); | |
1498 | return NULL; | |
1499 | } |