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" |
b4987c95 | 55 | #include "common/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 | { | |
6c95b8df PA |
69 | struct obj_section **sections; |
70 | int num_sections; | |
607ece04 GB |
71 | |
72 | /* Nonzero if object files have been added since the section map | |
73 | was last updated. */ | |
74 | int new_objfiles_available; | |
75 | ||
76 | /* Nonzero if the section map MUST be updated before use. */ | |
77 | int section_map_dirty; | |
78 | ||
79 | /* Nonzero if section map updates should be inhibited if possible. */ | |
80 | int inhibit_updates; | |
6c95b8df PA |
81 | }; |
82 | ||
83 | /* Per-program-space data key. */ | |
84 | static const struct program_space_data *objfiles_pspace_data; | |
85 | ||
86 | static void | |
87 | objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
88 | { | |
19ba03f4 | 89 | struct objfile_pspace_info *info = (struct objfile_pspace_info *) arg; |
6c95b8df | 90 | |
487ad57c YQ |
91 | xfree (info->sections); |
92 | xfree (info); | |
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 | ||
19ba03f4 SM |
103 | info = ((struct objfile_pspace_info *) |
104 | program_space_data (pspace, objfiles_pspace_data)); | |
6c95b8df PA |
105 | if (info == NULL) |
106 | { | |
41bf6aca | 107 | info = XCNEW (struct objfile_pspace_info); |
6c95b8df PA |
108 | set_program_space_data (pspace, objfiles_pspace_data, info); |
109 | } | |
110 | ||
111 | return info; | |
112 | } | |
113 | ||
706e3705 TT |
114 | \f |
115 | ||
116 | /* Per-BFD data key. */ | |
117 | ||
118 | static const struct bfd_data *objfiles_bfd_data; | |
119 | ||
d6797f46 TT |
120 | objfile_per_bfd_storage::~objfile_per_bfd_storage () |
121 | { | |
d6797f46 TT |
122 | } |
123 | ||
706e3705 TT |
124 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not |
125 | NULL, and it already has a per-BFD storage object, use that. | |
d6797f46 TT |
126 | Otherwise, allocate a new per-BFD storage object. Note that it is |
127 | not safe to call this multiple times for a given OBJFILE -- it can | |
128 | only be called when allocating or re-initializing OBJFILE. */ | |
706e3705 TT |
129 | |
130 | static struct objfile_per_bfd_storage * | |
131 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
132 | { | |
133 | struct objfile_per_bfd_storage *storage = NULL; | |
134 | ||
135 | if (abfd != NULL) | |
19ba03f4 SM |
136 | storage = ((struct objfile_per_bfd_storage *) |
137 | bfd_data (abfd, objfiles_bfd_data)); | |
706e3705 TT |
138 | |
139 | if (storage == NULL) | |
140 | { | |
d6797f46 | 141 | storage = new objfile_per_bfd_storage; |
1da77581 TT |
142 | /* If the object requires gdb to do relocations, we simply fall |
143 | back to not sharing data across users. These cases are rare | |
144 | enough that this seems reasonable. */ | |
145 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
d6797f46 | 146 | set_bfd_data (abfd, objfiles_bfd_data, storage); |
706e3705 | 147 | |
1da77581 TT |
148 | /* Look up the gdbarch associated with the BFD. */ |
149 | if (abfd != NULL) | |
150 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
706e3705 TT |
151 | } |
152 | ||
153 | return storage; | |
154 | } | |
155 | ||
d6797f46 | 156 | /* A deleter for objfile_per_bfd_storage that can be passed as a |
706e3705 TT |
157 | cleanup function to the BFD registry. */ |
158 | ||
159 | static void | |
160 | objfile_bfd_data_free (struct bfd *unused, void *d) | |
161 | { | |
d6797f46 | 162 | delete (struct objfile_per_bfd_storage *) d; |
706e3705 TT |
163 | } |
164 | ||
165 | /* See objfiles.h. */ | |
166 | ||
167 | void | |
168 | set_objfile_per_bfd (struct objfile *objfile) | |
169 | { | |
170 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
171 | } | |
172 | ||
3d548a53 TT |
173 | /* Set the objfile's per-BFD notion of the "main" name and |
174 | language. */ | |
175 | ||
176 | void | |
177 | set_objfile_main_name (struct objfile *objfile, | |
178 | const char *name, enum language lang) | |
179 | { | |
180 | if (objfile->per_bfd->name_of_main == NULL | |
181 | || strcmp (objfile->per_bfd->name_of_main, name) != 0) | |
182 | objfile->per_bfd->name_of_main | |
224c3ddb SM |
183 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, name, |
184 | strlen (name)); | |
3d548a53 TT |
185 | objfile->per_bfd->language_of_main = lang; |
186 | } | |
187 | ||
63e43d3a PMR |
188 | /* Helper structure to map blocks to static link properties in hash tables. */ |
189 | ||
190 | struct static_link_htab_entry | |
191 | { | |
192 | const struct block *block; | |
193 | const struct dynamic_prop *static_link; | |
194 | }; | |
195 | ||
196 | /* Return a hash code for struct static_link_htab_entry *P. */ | |
197 | ||
198 | static hashval_t | |
199 | static_link_htab_entry_hash (const void *p) | |
200 | { | |
201 | const struct static_link_htab_entry *e | |
202 | = (const struct static_link_htab_entry *) p; | |
203 | ||
204 | return htab_hash_pointer (e->block); | |
205 | } | |
206 | ||
207 | /* Return whether P1 an P2 (pointers to struct static_link_htab_entry) are | |
208 | mappings for the same block. */ | |
209 | ||
210 | static int | |
211 | static_link_htab_entry_eq (const void *p1, const void *p2) | |
212 | { | |
213 | const struct static_link_htab_entry *e1 | |
214 | = (const struct static_link_htab_entry *) p1; | |
215 | const struct static_link_htab_entry *e2 | |
216 | = (const struct static_link_htab_entry *) p2; | |
217 | ||
218 | return e1->block == e2->block; | |
219 | } | |
220 | ||
221 | /* Register STATIC_LINK as the static link for BLOCK, which is part of OBJFILE. | |
222 | Must not be called more than once for each BLOCK. */ | |
223 | ||
224 | void | |
225 | objfile_register_static_link (struct objfile *objfile, | |
226 | const struct block *block, | |
227 | const struct dynamic_prop *static_link) | |
228 | { | |
229 | void **slot; | |
230 | struct static_link_htab_entry lookup_entry; | |
231 | struct static_link_htab_entry *entry; | |
232 | ||
233 | if (objfile->static_links == NULL) | |
234 | objfile->static_links = htab_create_alloc | |
235 | (1, &static_link_htab_entry_hash, static_link_htab_entry_eq, NULL, | |
236 | xcalloc, xfree); | |
237 | ||
238 | /* Create a slot for the mapping, make sure it's the first mapping for this | |
239 | block and then create the mapping itself. */ | |
240 | lookup_entry.block = block; | |
241 | slot = htab_find_slot (objfile->static_links, &lookup_entry, INSERT); | |
242 | gdb_assert (*slot == NULL); | |
243 | ||
e39db4db | 244 | entry = XOBNEW (&objfile->objfile_obstack, static_link_htab_entry); |
63e43d3a PMR |
245 | entry->block = block; |
246 | entry->static_link = static_link; | |
247 | *slot = (void *) entry; | |
248 | } | |
249 | ||
250 | /* Look for a static link for BLOCK, which is part of OBJFILE. Return NULL if | |
251 | none was found. */ | |
252 | ||
253 | const struct dynamic_prop * | |
254 | objfile_lookup_static_link (struct objfile *objfile, | |
255 | const struct block *block) | |
256 | { | |
257 | struct static_link_htab_entry *entry; | |
258 | struct static_link_htab_entry lookup_entry; | |
259 | ||
260 | if (objfile->static_links == NULL) | |
261 | return NULL; | |
262 | lookup_entry.block = block; | |
263 | entry | |
264 | = (struct static_link_htab_entry *) htab_find (objfile->static_links, | |
265 | &lookup_entry); | |
266 | if (entry == NULL) | |
267 | return NULL; | |
268 | ||
269 | gdb_assert (entry->block == block); | |
270 | return entry->static_link; | |
271 | } | |
272 | ||
706e3705 TT |
273 | \f |
274 | ||
96baa820 JM |
275 | /* Called via bfd_map_over_sections to build up the section table that |
276 | the objfile references. The objfile contains pointers to the start | |
277 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 278 | the end of the table (objfile->sections_end). */ |
96baa820 | 279 | |
65cf3563 TT |
280 | static void |
281 | add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect, | |
282 | struct objfile *objfile, int force) | |
283 | { | |
284 | struct obj_section *section; | |
285 | ||
286 | if (!force) | |
287 | { | |
288 | flagword aflag; | |
289 | ||
290 | aflag = bfd_get_section_flags (abfd, asect); | |
291 | if (!(aflag & SEC_ALLOC)) | |
292 | return; | |
293 | } | |
294 | ||
295 | section = &objfile->sections[gdb_bfd_section_index (abfd, asect)]; | |
296 | section->objfile = objfile; | |
297 | section->the_bfd_section = asect; | |
298 | section->ovly_mapped = 0; | |
299 | } | |
300 | ||
c906108c | 301 | static void |
7be0c536 | 302 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 303 | void *objfilep) |
c906108c | 304 | { |
19ba03f4 | 305 | add_to_objfile_sections_full (abfd, asect, (struct objfile *) objfilep, 0); |
c906108c SS |
306 | } |
307 | ||
308 | /* Builds a section table for OBJFILE. | |
96baa820 | 309 | |
65cf3563 TT |
310 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
311 | initialized to zero. */ | |
c906108c | 312 | |
d82ea6a8 | 313 | void |
fba45db2 | 314 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 315 | { |
65cf3563 TT |
316 | int count = gdb_bfd_count_sections (objfile->obfd); |
317 | ||
318 | objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
319 | count, | |
320 | struct obj_section); | |
321 | objfile->sections_end = (objfile->sections + count); | |
f1f6aadf PA |
322 | bfd_map_over_sections (objfile->obfd, |
323 | add_to_objfile_sections, (void *) objfile); | |
65cf3563 TT |
324 | |
325 | /* See gdb_bfd_section_index. */ | |
326 | add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1); | |
327 | add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1); | |
328 | add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1); | |
329 | add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1); | |
c906108c SS |
330 | } |
331 | ||
9e86da07 TT |
332 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits, |
333 | initialize the new objfile as best we can and link it into the list | |
334 | of all known objfiles. | |
c906108c | 335 | |
24ba069a JK |
336 | NAME should contain original non-canonicalized filename or other |
337 | identifier as entered by user. If there is no better source use | |
338 | bfd_get_filename (ABFD). NAME may be NULL only if ABFD is NULL. | |
339 | NAME content is copied into returned objfile. | |
340 | ||
2df3850c | 341 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 342 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 343 | simply copied through to the new objfile flags member. */ |
c906108c | 344 | |
9e86da07 TT |
345 | objfile::objfile (bfd *abfd, const char *name, objfile_flags flags_) |
346 | : flags (flags_), | |
347 | pspace (current_program_space), | |
8d7bcccb | 348 | partial_symtabs (new psymtab_storage ()), |
d320c2b5 | 349 | obfd (abfd) |
c906108c | 350 | { |
14278e1f | 351 | const char *expanded_name; |
c906108c | 352 | |
2f6e5d7e TG |
353 | /* We could use obstack_specify_allocation here instead, but |
354 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
9e86da07 | 355 | obstack_init (&objfile_obstack); |
c906108c | 356 | |
9e86da07 | 357 | objfile_alloc_data (this); |
0d0e1a63 | 358 | |
e3e41d58 | 359 | gdb::unique_xmalloc_ptr<char> name_holder; |
24ba069a JK |
360 | if (name == NULL) |
361 | { | |
362 | gdb_assert (abfd == NULL); | |
40135bb1 | 363 | gdb_assert ((flags & OBJF_NOT_FILENAME) != 0); |
e3e41d58 | 364 | expanded_name = "<<anonymous objfile>>"; |
24ba069a | 365 | } |
5fbae7d1 GB |
366 | else if ((flags & OBJF_NOT_FILENAME) != 0 |
367 | || is_target_filename (name)) | |
e3e41d58 | 368 | expanded_name = name; |
04affae3 | 369 | else |
e3e41d58 TT |
370 | { |
371 | name_holder = gdb_abspath (name); | |
372 | expanded_name = name_holder.get (); | |
373 | } | |
9e86da07 TT |
374 | original_name |
375 | = (char *) obstack_copy0 (&objfile_obstack, | |
224c3ddb SM |
376 | expanded_name, |
377 | strlen (expanded_name)); | |
04affae3 | 378 | |
d3e81981 DE |
379 | /* Update the per-objfile information that comes from the bfd, ensuring |
380 | that any data that is reference is saved in the per-objfile data | |
381 | region. */ | |
382 | ||
8ac244b4 | 383 | gdb_bfd_ref (abfd); |
c906108c SS |
384 | if (abfd != NULL) |
385 | { | |
9e86da07 | 386 | mtime = bfd_get_mtime (abfd); |
c906108c SS |
387 | |
388 | /* Build section table. */ | |
9e86da07 | 389 | build_objfile_section_table (this); |
c906108c SS |
390 | } |
391 | ||
9e86da07 | 392 | per_bfd = get_objfile_bfd_data (this, abfd); |
34643a32 | 393 | |
0df8b418 | 394 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 395 | |
c906108c | 396 | if (object_files == NULL) |
9e86da07 | 397 | object_files = this; |
c906108c SS |
398 | else |
399 | { | |
2f6e5d7e TG |
400 | struct objfile *last_one; |
401 | ||
c906108c | 402 | for (last_one = object_files; |
c5aa993b JM |
403 | last_one->next; |
404 | last_one = last_one->next); | |
9e86da07 | 405 | last_one->next = this; |
c906108c SS |
406 | } |
407 | ||
6c95b8df | 408 | /* Rebuild section map next time we need it. */ |
9e86da07 | 409 | get_objfile_pspace_data (pspace)->new_objfiles_available = 1; |
c906108c SS |
410 | } |
411 | ||
5e2b427d | 412 | /* Retrieve the gdbarch associated with OBJFILE. */ |
9c1877ea | 413 | |
5e2b427d | 414 | struct gdbarch * |
9c1877ea | 415 | get_objfile_arch (const struct objfile *objfile) |
5e2b427d | 416 | { |
df6d5441 | 417 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
418 | } |
419 | ||
abd0a5fa JK |
420 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
421 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 422 | |
abd0a5fa JK |
423 | int |
424 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 425 | { |
6ef55de7 | 426 | if (symfile_objfile == NULL || !symfile_objfile->per_bfd->ei.entry_point_p) |
3612b192 DJ |
427 | return 0; |
428 | ||
6ef55de7 | 429 | *entry_p = (symfile_objfile->per_bfd->ei.entry_point |
53eddfa6 | 430 | + ANOFFSET (symfile_objfile->section_offsets, |
6ef55de7 | 431 | symfile_objfile->per_bfd->ei.the_bfd_section_index)); |
3612b192 | 432 | |
abd0a5fa JK |
433 | return 1; |
434 | } | |
435 | ||
436 | /* Get current entry point address. Call error if it is not known. */ | |
437 | ||
438 | CORE_ADDR | |
439 | entry_point_address (void) | |
440 | { | |
441 | CORE_ADDR retval; | |
442 | ||
443 | if (!entry_point_address_query (&retval)) | |
444 | error (_("Entry point address is not known.")); | |
445 | ||
446 | return retval; | |
9ab9195f | 447 | } |
15831452 | 448 | |
e9ad22ee TT |
449 | separate_debug_iterator & |
450 | separate_debug_iterator::operator++ () | |
15d123c9 | 451 | { |
e9ad22ee TT |
452 | gdb_assert (m_objfile != nullptr); |
453 | ||
15d123c9 TG |
454 | struct objfile *res; |
455 | ||
399f313b | 456 | /* If any, return the first child. */ |
e9ad22ee TT |
457 | res = m_objfile->separate_debug_objfile; |
458 | if (res != nullptr) | |
459 | { | |
460 | m_objfile = res; | |
461 | return *this; | |
462 | } | |
15d123c9 | 463 | |
15d123c9 | 464 | /* Common case where there is no separate debug objfile. */ |
e9ad22ee TT |
465 | if (m_objfile == m_parent) |
466 | { | |
467 | m_objfile = nullptr; | |
468 | return *this; | |
469 | } | |
15d123c9 | 470 | |
399f313b TG |
471 | /* Return the brother if any. Note that we don't iterate on brothers of |
472 | the parents. */ | |
e9ad22ee TT |
473 | res = m_objfile->separate_debug_objfile_link; |
474 | if (res != nullptr) | |
475 | { | |
476 | m_objfile = res; | |
477 | return *this; | |
478 | } | |
399f313b | 479 | |
e9ad22ee TT |
480 | for (res = m_objfile->separate_debug_objfile_backlink; |
481 | res != m_parent; | |
15d123c9 TG |
482 | res = res->separate_debug_objfile_backlink) |
483 | { | |
e9ad22ee TT |
484 | gdb_assert (res != nullptr); |
485 | if (res->separate_debug_objfile_link != nullptr) | |
486 | { | |
487 | m_objfile = res->separate_debug_objfile_link; | |
488 | return *this; | |
489 | } | |
15d123c9 | 490 | } |
e9ad22ee TT |
491 | m_objfile = nullptr; |
492 | return *this; | |
15d123c9 | 493 | } |
15831452 | 494 | |
5b5d99cf JB |
495 | /* Put one object file before a specified on in the global list. |
496 | This can be used to make sure an object file is destroyed before | |
7e955d83 | 497 | another when using objfiles_safe to free all objfiles. */ |
5b5d99cf JB |
498 | void |
499 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
500 | { | |
501 | struct objfile **objp; | |
502 | ||
503 | unlink_objfile (objfile); | |
504 | ||
505 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
506 | { | |
507 | if (*objp == before_this) | |
508 | { | |
509 | objfile->next = *objp; | |
510 | *objp = objfile; | |
511 | return; | |
512 | } | |
513 | } | |
514 | ||
515 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 516 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
517 | } |
518 | ||
c906108c SS |
519 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
520 | list. | |
521 | ||
522 | It is not a bug, or error, to call this function if OBJFILE is not known | |
523 | to be in the current list. This is done in the case of mapped objfiles, | |
524 | for example, just to ensure that the mapped objfile doesn't appear twice | |
525 | in the list. Since the list is threaded, linking in a mapped objfile | |
526 | twice would create a circular list. | |
527 | ||
528 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
529 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 530 | between the OBJFILE and the list. */ |
c906108c SS |
531 | |
532 | void | |
fba45db2 | 533 | unlink_objfile (struct objfile *objfile) |
c906108c | 534 | { |
c5aa993b | 535 | struct objfile **objpp; |
c906108c | 536 | |
c5aa993b | 537 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 538 | { |
c5aa993b | 539 | if (*objpp == objfile) |
c906108c | 540 | { |
c5aa993b JM |
541 | *objpp = (*objpp)->next; |
542 | objfile->next = NULL; | |
07cd4b97 | 543 | return; |
c906108c SS |
544 | } |
545 | } | |
07cd4b97 | 546 | |
8e65ff28 | 547 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 548 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
549 | } |
550 | ||
15d123c9 TG |
551 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
552 | ||
553 | void | |
554 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
555 | { | |
556 | gdb_assert (objfile && parent); | |
557 | ||
558 | /* Must not be already in a list. */ | |
559 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
560 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
561 | gdb_assert (objfile->separate_debug_objfile == NULL); |
562 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
563 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
564 | |
565 | objfile->separate_debug_objfile_backlink = parent; | |
566 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
567 | parent->separate_debug_objfile = objfile; | |
568 | ||
569 | /* Put the separate debug object before the normal one, this is so that | |
7e955d83 | 570 | usage of objfiles_safe will stay safe. */ |
15d123c9 TG |
571 | put_objfile_before (objfile, parent); |
572 | } | |
573 | ||
574 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
575 | itself. */ | |
576 | ||
577 | void | |
578 | free_objfile_separate_debug (struct objfile *objfile) | |
579 | { | |
580 | struct objfile *child; | |
581 | ||
582 | for (child = objfile->separate_debug_objfile; child;) | |
583 | { | |
584 | struct objfile *next_child = child->separate_debug_objfile_link; | |
9e86da07 | 585 | delete child; |
15d123c9 TG |
586 | child = next_child; |
587 | } | |
588 | } | |
c906108c | 589 | |
7580e917 | 590 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c | 591 | |
9e86da07 | 592 | objfile::~objfile () |
c906108c | 593 | { |
63644780 | 594 | /* First notify observers that this objfile is about to be freed. */ |
76727919 | 595 | gdb::observers::free_objfile.notify (this); |
63644780 | 596 | |
15d123c9 | 597 | /* Free all separate debug objfiles. */ |
9e86da07 | 598 | free_objfile_separate_debug (this); |
15d123c9 | 599 | |
9e86da07 | 600 | if (separate_debug_objfile_backlink) |
5b5d99cf JB |
601 | { |
602 | /* We freed the separate debug file, make sure the base objfile | |
603 | doesn't reference it. */ | |
15d123c9 TG |
604 | struct objfile *child; |
605 | ||
9e86da07 | 606 | child = separate_debug_objfile_backlink->separate_debug_objfile; |
15d123c9 | 607 | |
9e86da07 | 608 | if (child == this) |
15d123c9 | 609 | { |
9e86da07 TT |
610 | /* THIS is the first child. */ |
611 | separate_debug_objfile_backlink->separate_debug_objfile = | |
612 | separate_debug_objfile_link; | |
15d123c9 TG |
613 | } |
614 | else | |
615 | { | |
9e86da07 | 616 | /* Find THIS in the list. */ |
15d123c9 TG |
617 | while (1) |
618 | { | |
9e86da07 | 619 | if (child->separate_debug_objfile_link == this) |
15d123c9 TG |
620 | { |
621 | child->separate_debug_objfile_link = | |
9e86da07 | 622 | separate_debug_objfile_link; |
15d123c9 TG |
623 | break; |
624 | } | |
625 | child = child->separate_debug_objfile_link; | |
626 | gdb_assert (child); | |
627 | } | |
628 | } | |
5b5d99cf | 629 | } |
9e86da07 | 630 | |
ae5a43e0 DJ |
631 | /* Remove any references to this objfile in the global value |
632 | lists. */ | |
9e86da07 | 633 | preserve_values (this); |
ae5a43e0 | 634 | |
9f743ef6 JK |
635 | /* It still may reference data modules have associated with the objfile and |
636 | the symbol file data. */ | |
9e86da07 | 637 | forget_cached_source_info_for_objfile (this); |
9f743ef6 | 638 | |
9e86da07 TT |
639 | breakpoint_free_objfile (this); |
640 | btrace_free_objfile (this); | |
2f202fde | 641 | |
c906108c SS |
642 | /* First do any symbol file specific actions required when we are |
643 | finished with a particular symbol file. Note that if the objfile | |
644 | is using reusable symbol information (via mmalloc) then each of | |
645 | these routines is responsible for doing the correct thing, either | |
646 | freeing things which are valid only during this particular gdb | |
0df8b418 | 647 | execution, or leaving them to be reused during the next one. */ |
c906108c | 648 | |
9e86da07 TT |
649 | if (sf != NULL) |
650 | (*sf->sym_finish) (this); | |
c906108c | 651 | |
9f743ef6 | 652 | /* Discard any data modules have associated with the objfile. The function |
9e86da07 TT |
653 | still may reference obfd. */ |
654 | objfile_free_data (this); | |
c5bc3a77 | 655 | |
9e86da07 TT |
656 | if (obfd) |
657 | gdb_bfd_unref (obfd); | |
706e3705 | 658 | else |
d6797f46 | 659 | delete per_bfd; |
c906108c | 660 | |
0df8b418 | 661 | /* Remove it from the chain of all objfiles. */ |
c906108c | 662 | |
9e86da07 | 663 | unlink_objfile (this); |
c906108c | 664 | |
9e86da07 | 665 | if (this == symfile_objfile) |
adb7f338 | 666 | symfile_objfile = NULL; |
c906108c | 667 | |
c906108c SS |
668 | /* Before the symbol table code was redone to make it easier to |
669 | selectively load and remove information particular to a specific | |
670 | linkage unit, gdb used to do these things whenever the monolithic | |
671 | symbol table was blown away. How much still needs to be done | |
672 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 673 | it is shown to be no longer needed. */ |
c5aa993b | 674 | |
cb5d864f FF |
675 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
676 | for example), so we need to call this here. */ | |
c906108c SS |
677 | clear_pc_function_cache (); |
678 | ||
cb5d864f | 679 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 680 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
681 | |
682 | { | |
683 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 684 | |
9e86da07 | 685 | if (cursal.symtab && SYMTAB_OBJFILE (cursal.symtab) == this) |
00174a86 | 686 | clear_current_source_symtab_and_line (); |
cb5d864f FF |
687 | } |
688 | ||
0df8b418 | 689 | /* Free the obstacks for non-reusable objfiles. */ |
9e86da07 | 690 | obstack_free (&objfile_obstack, 0); |
6c95b8df PA |
691 | |
692 | /* Rebuild section map next time we need it. */ | |
9e86da07 | 693 | get_objfile_pspace_data (pspace)->section_map_dirty = 1; |
6c95b8df | 694 | |
63e43d3a PMR |
695 | /* Free the map for static links. There's no need to free static link |
696 | themselves since they were allocated on the objstack. */ | |
9e86da07 TT |
697 | if (static_links != NULL) |
698 | htab_delete (static_links); | |
c906108c SS |
699 | } |
700 | ||
c906108c SS |
701 | /* Free all the object files at once and clean up their users. */ |
702 | ||
703 | void | |
fba45db2 | 704 | free_all_objfiles (void) |
c906108c | 705 | { |
0133421a JK |
706 | struct so_list *so; |
707 | ||
ee371134 | 708 | /* Any objfile reference would become stale. */ |
0133421a JK |
709 | for (so = master_so_list (); so; so = so->next) |
710 | gdb_assert (so->objfile == NULL); | |
c906108c | 711 | |
7e955d83 | 712 | for (objfile *objfile : current_program_space->objfiles_safe ()) |
9e86da07 | 713 | delete objfile; |
c1e56572 | 714 | clear_symtab_users (0); |
c906108c SS |
715 | } |
716 | \f | |
34eaf542 TT |
717 | /* A helper function for objfile_relocate1 that relocates a single |
718 | symbol. */ | |
719 | ||
720 | static void | |
721 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
722 | struct section_offsets *delta) | |
723 | { | |
724 | fixup_symbol_section (sym, objfile); | |
725 | ||
726 | /* The RS6000 code from which this was taken skipped | |
727 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
728 | But I'm leaving out that test, on the theory that | |
729 | they can't possibly pass the tests below. */ | |
730 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
731 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
732 | && SYMBOL_SECTION (sym) >= 0) | |
733 | { | |
734 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
735 | } | |
736 | } | |
737 | ||
c906108c | 738 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
739 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
740 | Return non-zero iff any change happened. */ | |
567995e1 | 741 | |
b260e109 | 742 | static int |
5cc80db3 | 743 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 744 | const struct section_offsets *new_offsets) |
c906108c | 745 | { |
d4f3574e | 746 | struct section_offsets *delta = |
a39a16c4 MM |
747 | ((struct section_offsets *) |
748 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 749 | |
5cc80db3 MS |
750 | int something_changed = 0; |
751 | ||
b926417a | 752 | for (int i = 0; i < objfile->num_sections; ++i) |
5cc80db3 MS |
753 | { |
754 | delta->offsets[i] = | |
755 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
756 | if (ANOFFSET (delta, i) != 0) | |
757 | something_changed = 1; | |
758 | } | |
759 | if (!something_changed) | |
760 | return 0; | |
c906108c SS |
761 | |
762 | /* OK, get all the symtabs. */ | |
763 | { | |
b669c953 | 764 | for (compunit_symtab *cust : objfile->compunits ()) |
d5da8b3c TT |
765 | { |
766 | for (symtab *s : compunit_filetabs (cust)) | |
767 | { | |
768 | struct linetable *l; | |
769 | ||
770 | /* First the line table. */ | |
771 | l = SYMTAB_LINETABLE (s); | |
772 | if (l) | |
773 | { | |
774 | for (int i = 0; i < l->nitems; ++i) | |
775 | l->item[i].pc += ANOFFSET (delta, | |
776 | COMPUNIT_BLOCK_LINE_SECTION | |
777 | (cust)); | |
778 | } | |
779 | } | |
780 | } | |
c906108c | 781 | |
b669c953 | 782 | for (compunit_symtab *cust : objfile->compunits ()) |
592553c4 TT |
783 | { |
784 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (cust); | |
785 | int block_line_section = COMPUNIT_BLOCK_LINE_SECTION (cust); | |
786 | ||
787 | if (BLOCKVECTOR_MAP (bv)) | |
788 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
789 | ANOFFSET (delta, block_line_section)); | |
790 | ||
791 | for (int i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
792 | { | |
793 | struct block *b; | |
794 | struct symbol *sym; | |
b026f593 | 795 | struct mdict_iterator miter; |
592553c4 TT |
796 | |
797 | b = BLOCKVECTOR_BLOCK (bv, i); | |
798 | BLOCK_START (b) += ANOFFSET (delta, block_line_section); | |
799 | BLOCK_END (b) += ANOFFSET (delta, block_line_section); | |
800 | ||
801 | if (BLOCK_RANGES (b) != nullptr) | |
802 | for (int j = 0; j < BLOCK_NRANGES (b); j++) | |
803 | { | |
804 | BLOCK_RANGE_START (b, j) | |
805 | += ANOFFSET (delta, block_line_section); | |
806 | BLOCK_RANGE_END (b, j) += ANOFFSET (delta, | |
807 | block_line_section); | |
808 | } | |
809 | ||
810 | /* We only want to iterate over the local symbols, not any | |
811 | symbols in included symtabs. */ | |
b026f593 | 812 | ALL_DICT_SYMBOLS (BLOCK_MULTIDICT (b), miter, sym) |
9644dc3a | 813 | { |
592553c4 | 814 | relocate_one_symbol (sym, objfile, delta); |
9644dc3a | 815 | } |
592553c4 TT |
816 | } |
817 | } | |
c906108c SS |
818 | } |
819 | ||
79748972 TT |
820 | /* This stores relocated addresses and so must be cleared. This |
821 | will cause it to be recreated on demand. */ | |
822 | objfile->psymbol_map.clear (); | |
823 | ||
34eaf542 TT |
824 | /* Relocate isolated symbols. */ |
825 | { | |
826 | struct symbol *iter; | |
827 | ||
828 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
829 | relocate_one_symbol (iter, objfile, delta); | |
830 | } | |
831 | ||
f1f2b5f4 PA |
832 | { |
833 | int i; | |
5cc80db3 | 834 | |
f1f2b5f4 PA |
835 | for (i = 0; i < objfile->num_sections; ++i) |
836 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
837 | } | |
838 | ||
839 | /* Rebuild section map next time we need it. */ | |
607ece04 | 840 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 841 | |
30510692 | 842 | /* Update the table in exec_ops, used to read memory. */ |
b926417a | 843 | struct obj_section *s; |
30510692 DJ |
844 | ALL_OBJFILE_OSECTIONS (objfile, s) |
845 | { | |
65cf3563 | 846 | int idx = s - objfile->sections; |
30510692 DJ |
847 | |
848 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 849 | obj_section_addr (s)); |
30510692 | 850 | } |
b260e109 JK |
851 | |
852 | /* Data changed. */ | |
853 | return 1; | |
567995e1 JK |
854 | } |
855 | ||
856 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
857 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
858 | ||
859 | The number and ordering of sections does differ between the two objfiles. | |
860 | Only their names match. Also the file offsets will differ (objfile being | |
861 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
862 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
863 | files. */ | |
864 | ||
865 | void | |
3189cb12 DE |
866 | objfile_relocate (struct objfile *objfile, |
867 | const struct section_offsets *new_offsets) | |
567995e1 | 868 | { |
b260e109 | 869 | int changed = 0; |
567995e1 | 870 | |
b260e109 | 871 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 | 872 | |
e9ad22ee | 873 | for (struct objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
567995e1 | 874 | { |
e9ad22ee TT |
875 | if (debug_objfile == objfile) |
876 | continue; | |
877 | ||
37e136b1 TT |
878 | section_addr_info objfile_addrs |
879 | = build_section_addr_info_from_objfile (objfile); | |
567995e1 JK |
880 | |
881 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
882 | relative ones must be already created according to debug_objfile. */ | |
883 | ||
37e136b1 | 884 | addr_info_make_relative (&objfile_addrs, debug_objfile->obfd); |
567995e1 JK |
885 | |
886 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 887 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
cfe826d4 TT |
888 | std::vector<struct section_offsets> |
889 | new_debug_offsets (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
890 | relative_addr_info_to_section_offsets (new_debug_offsets.data (), | |
567995e1 JK |
891 | debug_objfile->num_sections, |
892 | objfile_addrs); | |
893 | ||
cfe826d4 | 894 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets.data ()); |
567995e1 | 895 | } |
30510692 | 896 | |
0df8b418 | 897 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
898 | if (changed) |
899 | breakpoint_re_set (); | |
c906108c | 900 | } |
4141a416 JB |
901 | |
902 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
903 | not touched here. | |
904 | Return non-zero iff any change happened. */ | |
905 | ||
906 | static int | |
907 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
908 | { | |
909 | struct section_offsets *new_offsets = | |
910 | ((struct section_offsets *) | |
911 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
912 | int i; | |
913 | ||
914 | for (i = 0; i < objfile->num_sections; ++i) | |
915 | new_offsets->offsets[i] = slide; | |
916 | ||
917 | return objfile_relocate1 (objfile, new_offsets); | |
918 | } | |
919 | ||
920 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
921 | SEPARATE_DEBUG_OBJFILEs. */ | |
922 | ||
923 | void | |
924 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
925 | { | |
4141a416 JB |
926 | int changed = 0; |
927 | ||
e9ad22ee | 928 | for (struct objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
4141a416 JB |
929 | changed |= objfile_rebase1 (debug_objfile, slide); |
930 | ||
931 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
932 | if (changed) | |
933 | breakpoint_re_set (); | |
934 | } | |
c906108c | 935 | \f |
55333a84 DE |
936 | /* Return non-zero if OBJFILE has partial symbols. */ |
937 | ||
938 | int | |
939 | objfile_has_partial_symbols (struct objfile *objfile) | |
940 | { | |
b11896a5 TT |
941 | if (!objfile->sf) |
942 | return 0; | |
3e03848b JK |
943 | |
944 | /* If we have not read psymbols, but we have a function capable of reading | |
945 | them, then that is an indication that they are in fact available. Without | |
946 | this function the symbols may have been already read in but they also may | |
947 | not be present in this objfile. */ | |
948 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
949 | && objfile->sf->sym_read_psymbols != NULL) | |
950 | return 1; | |
951 | ||
b11896a5 | 952 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
953 | } |
954 | ||
955 | /* Return non-zero if OBJFILE has full symbols. */ | |
956 | ||
957 | int | |
958 | objfile_has_full_symbols (struct objfile *objfile) | |
959 | { | |
43f3e411 | 960 | return objfile->compunit_symtabs != NULL; |
55333a84 DE |
961 | } |
962 | ||
e361b228 | 963 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 964 | or through a separate debug file. */ |
e361b228 TG |
965 | |
966 | int | |
967 | objfile_has_symbols (struct objfile *objfile) | |
968 | { | |
e9ad22ee | 969 | for (struct objfile *o : objfile->separate_debug_objfiles ()) |
15d123c9 TG |
970 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) |
971 | return 1; | |
e361b228 TG |
972 | return 0; |
973 | } | |
974 | ||
975 | ||
c906108c SS |
976 | /* Many places in gdb want to test just to see if we have any partial |
977 | symbols available. This function returns zero if none are currently | |
0df8b418 | 978 | available, nonzero otherwise. */ |
c906108c SS |
979 | |
980 | int | |
fba45db2 | 981 | have_partial_symbols (void) |
c906108c | 982 | { |
2030c079 | 983 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
984 | { |
985 | if (objfile_has_partial_symbols (ofp)) | |
986 | return 1; | |
987 | } | |
c906108c SS |
988 | return 0; |
989 | } | |
990 | ||
991 | /* Many places in gdb want to test just to see if we have any full | |
992 | symbols available. This function returns zero if none are currently | |
0df8b418 | 993 | available, nonzero otherwise. */ |
c906108c SS |
994 | |
995 | int | |
fba45db2 | 996 | have_full_symbols (void) |
c906108c | 997 | { |
2030c079 | 998 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
999 | { |
1000 | if (objfile_has_full_symbols (ofp)) | |
1001 | return 1; | |
1002 | } | |
c906108c SS |
1003 | return 0; |
1004 | } | |
1005 | ||
1006 | ||
1007 | /* This operations deletes all objfile entries that represent solibs that | |
1008 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
1009 | command. */ |
1010 | ||
c906108c | 1011 | void |
fba45db2 | 1012 | objfile_purge_solibs (void) |
c906108c | 1013 | { |
7e955d83 | 1014 | for (objfile *objf : current_program_space->objfiles_safe ()) |
cac85af2 TT |
1015 | { |
1016 | /* We assume that the solib package has been purged already, or will | |
1017 | be soon. */ | |
0df8b418 | 1018 | |
cac85af2 TT |
1019 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
1020 | delete objf; | |
1021 | } | |
c906108c SS |
1022 | } |
1023 | ||
1024 | ||
1025 | /* Many places in gdb want to test just to see if we have any minimal | |
1026 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1027 | available, nonzero otherwise. */ |
c906108c SS |
1028 | |
1029 | int | |
fba45db2 | 1030 | have_minimal_symbols (void) |
c906108c | 1031 | { |
2030c079 | 1032 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
1033 | { |
1034 | if (ofp->per_bfd->minimal_symbol_count > 0) | |
1035 | { | |
1036 | return 1; | |
1037 | } | |
1038 | } | |
c906108c SS |
1039 | return 0; |
1040 | } | |
1041 | ||
a845f5cb PP |
1042 | /* Qsort comparison function. */ |
1043 | ||
1044 | static int | |
1045 | qsort_cmp (const void *a, const void *b) | |
1046 | { | |
1047 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1048 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1049 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1050 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1051 | ||
1052 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1053 | return -1; |
a845f5cb | 1054 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1055 | return 1; |
1056 | else | |
5cc80db3 MS |
1057 | { |
1058 | /* Sections are at the same address. This could happen if | |
1059 | A) we have an objfile and a separate debuginfo. | |
1060 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1061 | or something like that. */ |
5cc80db3 MS |
1062 | |
1063 | const struct objfile *const objfile1 = sect1->objfile; | |
1064 | const struct objfile *const objfile2 = sect2->objfile; | |
1065 | ||
1066 | if (objfile1->separate_debug_objfile == objfile2 | |
1067 | || objfile2->separate_debug_objfile == objfile1) | |
1068 | { | |
1069 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1070 | will be filtered out later. */ | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1076 | triage. This section could be slow (since we iterate over all | |
1077 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1078 | very often (GDB is already in a confused state; one hopes this | |
1079 | doesn't happen at all). If you discover that significant time is | |
1080 | spent in the loops below, do 'set complaints 100' and examine the | |
1081 | resulting complaints. */ | |
1082 | ||
1083 | if (objfile1 == objfile2) | |
1084 | { | |
1085 | /* Both sections came from the same objfile. We are really confused. | |
1086 | Sort on sequence order of sections within the objfile. */ | |
1087 | ||
1088 | const struct obj_section *osect; | |
1089 | ||
1090 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1091 | if (osect == sect1) | |
1092 | return -1; | |
1093 | else if (osect == sect2) | |
1094 | return 1; | |
1095 | ||
1096 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1097 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1098 | } |
1099 | else | |
1100 | { | |
1101 | /* Sort on sequence number of the objfile in the chain. */ | |
1102 | ||
2030c079 | 1103 | for (objfile *objfile : current_program_space->objfiles ()) |
5cc80db3 MS |
1104 | if (objfile == objfile1) |
1105 | return -1; | |
1106 | else if (objfile == objfile2) | |
1107 | return 1; | |
1108 | ||
1109 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1110 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1111 | } |
1112 | } | |
6fbf07cd PP |
1113 | |
1114 | /* Unreachable. */ | |
f3574227 | 1115 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1116 | return 0; |
1117 | } | |
1118 | ||
3aad21cf PP |
1119 | /* Select "better" obj_section to keep. We prefer the one that came from |
1120 | the real object, rather than the one from separate debuginfo. | |
1121 | Most of the time the two sections are exactly identical, but with | |
1122 | prelinking the .rel.dyn section in the real object may have different | |
1123 | size. */ | |
1124 | ||
1125 | static struct obj_section * | |
1126 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1127 | { | |
1128 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1129 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1130 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1131 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1132 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1133 | ||
1134 | if (a->objfile->separate_debug_objfile != NULL) | |
1135 | return a; | |
1136 | return b; | |
1137 | } | |
1138 | ||
6fbf07cd PP |
1139 | /* Return 1 if SECTION should be inserted into the section map. |
1140 | We want to insert only non-overlay and non-TLS section. */ | |
1141 | ||
1142 | static int | |
1143 | insert_section_p (const struct bfd *abfd, | |
1144 | const struct bfd_section *section) | |
1145 | { | |
1146 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1147 | ||
50f8ea94 | 1148 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1149 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1150 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1151 | discarding sections from the "system supplied DSO" (aka vdso) | |
1152 | on some Linux systems (e.g. Fedora 11). */ | |
1153 | return 0; | |
1154 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1155 | /* This is a TLS section. */ | |
1156 | return 0; | |
1157 | ||
1158 | return 1; | |
1159 | } | |
1160 | ||
1161 | /* Filter out overlapping sections where one section came from the real | |
1162 | objfile, and the other from a separate debuginfo file. | |
1163 | Return the size of table after redundant sections have been eliminated. */ | |
1164 | ||
1165 | static int | |
1166 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1167 | { | |
1168 | int i, j; | |
1169 | ||
1170 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1171 | { | |
1172 | struct obj_section *const sect1 = map[i]; | |
1173 | struct obj_section *const sect2 = map[i + 1]; | |
1174 | const struct objfile *const objfile1 = sect1->objfile; | |
1175 | const struct objfile *const objfile2 = sect2->objfile; | |
1176 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1177 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1178 | ||
1179 | if (sect1_addr == sect2_addr | |
1180 | && (objfile1->separate_debug_objfile == objfile2 | |
1181 | || objfile2->separate_debug_objfile == objfile1)) | |
1182 | { | |
1183 | map[j++] = preferred_obj_section (sect1, sect2); | |
1184 | ++i; | |
1185 | } | |
1186 | else | |
1187 | map[j++] = sect1; | |
1188 | } | |
1189 | ||
1190 | if (i < map_size) | |
1191 | { | |
1192 | gdb_assert (i == map_size - 1); | |
1193 | map[j++] = map[i]; | |
1194 | } | |
1195 | ||
1196 | /* The map should not have shrunk to less than half the original size. */ | |
1197 | gdb_assert (map_size / 2 <= j); | |
1198 | ||
1199 | return j; | |
1200 | } | |
1201 | ||
1202 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1203 | Overlapping sections could really be overlay sections which we didn't | |
1204 | classify as such in insert_section_p, or we could be dealing with a | |
1205 | corrupt binary. */ | |
1206 | ||
1207 | static int | |
1208 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1209 | { | |
1210 | int i, j; | |
1211 | ||
1212 | for (i = 0, j = 0; i < map_size - 1; ) | |
1213 | { | |
1214 | int k; | |
1215 | ||
1216 | map[j++] = map[i]; | |
1217 | for (k = i + 1; k < map_size; k++) | |
1218 | { | |
1219 | struct obj_section *const sect1 = map[i]; | |
1220 | struct obj_section *const sect2 = map[k]; | |
1221 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1222 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1223 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1224 | ||
1225 | gdb_assert (sect1_addr <= sect2_addr); | |
1226 | ||
1227 | if (sect1_endaddr <= sect2_addr) | |
1228 | break; | |
1229 | else | |
1230 | { | |
1231 | /* We have an overlap. Report it. */ | |
1232 | ||
1233 | struct objfile *const objf1 = sect1->objfile; | |
1234 | struct objfile *const objf2 = sect2->objfile; | |
1235 | ||
6fbf07cd PP |
1236 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1237 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1238 | ||
1239 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1240 | ||
1241 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1242 | ||
b98664d3 | 1243 | complaint (_("unexpected overlap between:\n" |
6fbf07cd PP |
1244 | " (A) section `%s' from `%s' [%s, %s)\n" |
1245 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1246 | "Will ignore section B"), | |
4262abfb | 1247 | bfd_section_name (abfd1, bfds1), objfile_name (objf1), |
6fbf07cd PP |
1248 | paddress (gdbarch, sect1_addr), |
1249 | paddress (gdbarch, sect1_endaddr), | |
4262abfb | 1250 | bfd_section_name (abfd2, bfds2), objfile_name (objf2), |
6fbf07cd PP |
1251 | paddress (gdbarch, sect2_addr), |
1252 | paddress (gdbarch, sect2_endaddr)); | |
1253 | } | |
1254 | } | |
1255 | i = k; | |
1256 | } | |
1257 | ||
1258 | if (i < map_size) | |
1259 | { | |
1260 | gdb_assert (i == map_size - 1); | |
1261 | map[j++] = map[i]; | |
1262 | } | |
1263 | ||
1264 | return j; | |
1265 | } | |
1266 | ||
1267 | ||
1268 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1269 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1270 | |
1271 | static void | |
6c95b8df PA |
1272 | update_section_map (struct program_space *pspace, |
1273 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1274 | { |
607ece04 | 1275 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1276 | int alloc_size, map_size, i; |
a845f5cb | 1277 | struct obj_section *s, **map; |
a845f5cb | 1278 | |
607ece04 GB |
1279 | pspace_info = get_objfile_pspace_data (pspace); |
1280 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1281 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1282 | |
1283 | map = *pmap; | |
1284 | xfree (map); | |
1285 | ||
6fbf07cd | 1286 | alloc_size = 0; |
2030c079 | 1287 | for (objfile *objfile : pspace->objfiles ()) |
6c95b8df PA |
1288 | ALL_OBJFILE_OSECTIONS (objfile, s) |
1289 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1290 | alloc_size += 1; | |
a845f5cb | 1291 | |
65a97ab3 PP |
1292 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1293 | if (alloc_size == 0) | |
1294 | { | |
1295 | *pmap = NULL; | |
1296 | *pmap_size = 0; | |
1297 | return; | |
1298 | } | |
1299 | ||
8d749320 | 1300 | map = XNEWVEC (struct obj_section *, alloc_size); |
a845f5cb | 1301 | |
3aad21cf | 1302 | i = 0; |
2030c079 | 1303 | for (objfile *objfile : pspace->objfiles ()) |
6c95b8df PA |
1304 | ALL_OBJFILE_OSECTIONS (objfile, s) |
1305 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1306 | map[i++] = s; | |
a845f5cb | 1307 | |
6fbf07cd PP |
1308 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1309 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1310 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1311 | |
6fbf07cd PP |
1312 | if (map_size < alloc_size) |
1313 | /* Some sections were eliminated. Trim excess space. */ | |
224c3ddb | 1314 | map = XRESIZEVEC (struct obj_section *, map, map_size); |
3aad21cf | 1315 | else |
6fbf07cd | 1316 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1317 | |
a845f5cb PP |
1318 | *pmap = map; |
1319 | *pmap_size = map_size; | |
1320 | } | |
1321 | ||
0df8b418 | 1322 | /* Bsearch comparison function. */ |
a845f5cb PP |
1323 | |
1324 | static int | |
1325 | bsearch_cmp (const void *key, const void *elt) | |
1326 | { | |
1327 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1328 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1329 | ||
1330 | if (pc < obj_section_addr (section)) | |
1331 | return -1; | |
1332 | if (pc < obj_section_endaddr (section)) | |
1333 | return 0; | |
1334 | return 1; | |
1335 | } | |
1336 | ||
714835d5 | 1337 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1338 | |
1339 | struct obj_section * | |
714835d5 | 1340 | find_pc_section (CORE_ADDR pc) |
c906108c | 1341 | { |
6c95b8df | 1342 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1343 | struct obj_section *s, **sp; |
c5aa993b | 1344 | |
714835d5 UW |
1345 | /* Check for mapped overlay section first. */ |
1346 | s = find_pc_mapped_section (pc); | |
1347 | if (s) | |
1348 | return s; | |
c906108c | 1349 | |
6c95b8df | 1350 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1351 | if (pspace_info->section_map_dirty |
1352 | || (pspace_info->new_objfiles_available | |
1353 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1354 | { |
6c95b8df PA |
1355 | update_section_map (current_program_space, |
1356 | &pspace_info->sections, | |
1357 | &pspace_info->num_sections); | |
c906108c | 1358 | |
6c95b8df PA |
1359 | /* Don't need updates to section map until objfiles are added, |
1360 | removed or relocated. */ | |
607ece04 GB |
1361 | pspace_info->new_objfiles_available = 0; |
1362 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1363 | } |
1364 | ||
65a97ab3 PP |
1365 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1366 | bsearch be non-NULL. */ | |
1367 | if (pspace_info->sections == NULL) | |
1368 | { | |
1369 | gdb_assert (pspace_info->num_sections == 0); | |
1370 | return NULL; | |
1371 | } | |
1372 | ||
6c95b8df PA |
1373 | sp = (struct obj_section **) bsearch (&pc, |
1374 | pspace_info->sections, | |
1375 | pspace_info->num_sections, | |
1376 | sizeof (*pspace_info->sections), | |
1377 | bsearch_cmp); | |
a845f5cb PP |
1378 | if (sp != NULL) |
1379 | return *sp; | |
714835d5 | 1380 | return NULL; |
c906108c | 1381 | } |
c5aa993b | 1382 | |
c906108c | 1383 | |
3e5d3a5a | 1384 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1385 | |
1386 | int | |
a121b7c1 | 1387 | pc_in_section (CORE_ADDR pc, const char *name) |
c906108c SS |
1388 | { |
1389 | struct obj_section *s; | |
1390 | int retval = 0; | |
c5aa993b JM |
1391 | |
1392 | s = find_pc_section (pc); | |
1393 | ||
c906108c SS |
1394 | retval = (s != NULL |
1395 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1396 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1397 | return (retval); |
c906108c | 1398 | } |
0d0e1a63 MK |
1399 | \f |
1400 | ||
607ece04 | 1401 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1402 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1403 | |
1404 | void | |
bb272892 | 1405 | objfiles_changed (void) |
a845f5cb | 1406 | { |
6c95b8df | 1407 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1408 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1409 | } | |
1410 | ||
1411 | /* See comments in objfiles.h. */ | |
1412 | ||
06424eac | 1413 | scoped_restore_tmpl<int> |
607ece04 GB |
1414 | inhibit_section_map_updates (struct program_space *pspace) |
1415 | { | |
06424eac TT |
1416 | return scoped_restore_tmpl<int> |
1417 | (&get_objfile_pspace_data (pspace)->inhibit_updates, 1); | |
a845f5cb | 1418 | } |
e3c69974 | 1419 | |
63644780 NB |
1420 | /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0 |
1421 | otherwise. */ | |
1422 | ||
1423 | int | |
1424 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) | |
1425 | { | |
1426 | struct obj_section *osect; | |
1427 | ||
1428 | if (objfile == NULL) | |
1429 | return 0; | |
1430 | ||
1431 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1432 | { | |
1433 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1434 | continue; | |
1435 | ||
1436 | if (obj_section_addr (osect) <= addr | |
1437 | && addr < obj_section_endaddr (osect)) | |
1438 | return 1; | |
1439 | } | |
1440 | return 0; | |
1441 | } | |
1442 | ||
08351840 | 1443 | int |
d03de421 PA |
1444 | shared_objfile_contains_address_p (struct program_space *pspace, |
1445 | CORE_ADDR address) | |
08351840 | 1446 | { |
2030c079 | 1447 | for (objfile *objfile : pspace->objfiles ()) |
08351840 | 1448 | { |
d03de421 | 1449 | if ((objfile->flags & OBJF_SHARED) != 0 |
08351840 PA |
1450 | && is_addr_in_objfile (address, objfile)) |
1451 | return 1; | |
1452 | } | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1456 | ||
19630284 | 1457 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
2030c079 | 1458 | gdbarch method. It is equivalent to use the objfiles iterable, |
19630284 JB |
1459 | searching the objfiles in the order they are stored internally, |
1460 | ignoring CURRENT_OBJFILE. | |
1461 | ||
1462 | On most platorms, it should be close enough to doing the best | |
1463 | we can without some knowledge specific to the architecture. */ | |
1464 | ||
1465 | void | |
1466 | default_iterate_over_objfiles_in_search_order | |
1467 | (struct gdbarch *gdbarch, | |
1468 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1469 | void *cb_data, struct objfile *current_objfile) | |
1470 | { | |
1471 | int stop = 0; | |
19630284 | 1472 | |
2030c079 | 1473 | for (objfile *objfile : current_program_space->objfiles ()) |
19630284 JB |
1474 | { |
1475 | stop = cb (objfile, cb_data); | |
1476 | if (stop) | |
1477 | return; | |
1478 | } | |
1479 | } | |
1480 | ||
e02c96a7 | 1481 | /* See objfiles.h. */ |
4262abfb JK |
1482 | |
1483 | const char * | |
1484 | objfile_name (const struct objfile *objfile) | |
1485 | { | |
24ba069a JK |
1486 | if (objfile->obfd != NULL) |
1487 | return bfd_get_filename (objfile->obfd); | |
1488 | ||
4262abfb JK |
1489 | return objfile->original_name; |
1490 | } | |
1491 | ||
cc485e62 DE |
1492 | /* See objfiles.h. */ |
1493 | ||
e02c96a7 DE |
1494 | const char * |
1495 | objfile_filename (const struct objfile *objfile) | |
1496 | { | |
1497 | if (objfile->obfd != NULL) | |
1498 | return bfd_get_filename (objfile->obfd); | |
1499 | ||
1500 | return NULL; | |
1501 | } | |
1502 | ||
1503 | /* See objfiles.h. */ | |
1504 | ||
cc485e62 DE |
1505 | const char * |
1506 | objfile_debug_name (const struct objfile *objfile) | |
1507 | { | |
1508 | return lbasename (objfile->original_name); | |
1509 | } | |
1510 | ||
015d2e7e DE |
1511 | /* See objfiles.h. */ |
1512 | ||
1513 | const char * | |
1514 | objfile_flavour_name (struct objfile *objfile) | |
1515 | { | |
1516 | if (objfile->obfd != NULL) | |
1517 | return bfd_flavour_name (bfd_get_flavour (objfile->obfd)); | |
1518 | return NULL; | |
1519 | } | |
1520 | ||
6c95b8df PA |
1521 | void |
1522 | _initialize_objfiles (void) | |
1523 | { | |
1524 | objfiles_pspace_data | |
8e260fc0 TT |
1525 | = register_program_space_data_with_cleanup (NULL, |
1526 | objfiles_pspace_data_cleanup); | |
706e3705 TT |
1527 | |
1528 | objfiles_bfd_data = register_bfd_data_with_cleanup (NULL, | |
1529 | objfile_bfd_data_free); | |
6c95b8df | 1530 | } |