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 | |
d0801dd8 | 57 | #include <algorithm> |
cfe826d4 TT |
58 | #include <vector> |
59 | ||
8e260fc0 TT |
60 | /* Keep a registry of per-objfile data-pointers required by other GDB |
61 | modules. */ | |
c906108c | 62 | |
6b81941e | 63 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 64 | |
c906108c | 65 | /* Externally visible variables that are owned by this module. |
0df8b418 | 66 | See declarations in objfile.h for more info. */ |
c906108c | 67 | |
6c95b8df PA |
68 | struct objfile_pspace_info |
69 | { | |
f6aa7436 TT |
70 | objfile_pspace_info () = default; |
71 | ~objfile_pspace_info (); | |
72 | ||
73 | struct obj_section **sections = nullptr; | |
74 | int num_sections = 0; | |
607ece04 GB |
75 | |
76 | /* Nonzero if object files have been added since the section map | |
77 | was last updated. */ | |
f6aa7436 | 78 | int new_objfiles_available = 0; |
607ece04 GB |
79 | |
80 | /* Nonzero if the section map MUST be updated before use. */ | |
f6aa7436 | 81 | int section_map_dirty = 0; |
607ece04 GB |
82 | |
83 | /* Nonzero if section map updates should be inhibited if possible. */ | |
f6aa7436 | 84 | int inhibit_updates = 0; |
6c95b8df PA |
85 | }; |
86 | ||
87 | /* Per-program-space data key. */ | |
f6aa7436 TT |
88 | static const struct program_space_key<objfile_pspace_info> |
89 | objfiles_pspace_data; | |
6c95b8df | 90 | |
f6aa7436 | 91 | objfile_pspace_info::~objfile_pspace_info () |
6c95b8df | 92 | { |
f6aa7436 | 93 | xfree (sections); |
6c95b8df PA |
94 | } |
95 | ||
96 | /* Get the current svr4 data. If none is found yet, add it now. This | |
97 | function always returns a valid object. */ | |
98 | ||
99 | static struct objfile_pspace_info * | |
100 | get_objfile_pspace_data (struct program_space *pspace) | |
101 | { | |
102 | struct objfile_pspace_info *info; | |
103 | ||
f6aa7436 | 104 | info = objfiles_pspace_data.get (pspace); |
6c95b8df | 105 | if (info == NULL) |
f6aa7436 | 106 | info = objfiles_pspace_data.emplace (pspace); |
6c95b8df PA |
107 | |
108 | return info; | |
109 | } | |
110 | ||
706e3705 TT |
111 | \f |
112 | ||
113 | /* Per-BFD data key. */ | |
114 | ||
f6aa7436 | 115 | static const struct bfd_key<objfile_per_bfd_storage> objfiles_bfd_data; |
706e3705 | 116 | |
d6797f46 TT |
117 | objfile_per_bfd_storage::~objfile_per_bfd_storage () |
118 | { | |
d6797f46 TT |
119 | } |
120 | ||
706e3705 TT |
121 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not |
122 | NULL, and it already has a per-BFD storage object, use that. | |
d6797f46 TT |
123 | Otherwise, allocate a new per-BFD storage object. Note that it is |
124 | not safe to call this multiple times for a given OBJFILE -- it can | |
125 | only be called when allocating or re-initializing OBJFILE. */ | |
706e3705 TT |
126 | |
127 | static struct objfile_per_bfd_storage * | |
128 | get_objfile_bfd_data (struct objfile *objfile, struct bfd *abfd) | |
129 | { | |
130 | struct objfile_per_bfd_storage *storage = NULL; | |
131 | ||
132 | if (abfd != NULL) | |
f6aa7436 | 133 | storage = objfiles_bfd_data.get (abfd); |
706e3705 TT |
134 | |
135 | if (storage == NULL) | |
136 | { | |
d6797f46 | 137 | storage = new objfile_per_bfd_storage; |
1da77581 TT |
138 | /* If the object requires gdb to do relocations, we simply fall |
139 | back to not sharing data across users. These cases are rare | |
140 | enough that this seems reasonable. */ | |
141 | if (abfd != NULL && !gdb_bfd_requires_relocations (abfd)) | |
f6aa7436 | 142 | objfiles_bfd_data.set (abfd, storage); |
706e3705 | 143 | |
1da77581 TT |
144 | /* Look up the gdbarch associated with the BFD. */ |
145 | if (abfd != NULL) | |
146 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
706e3705 TT |
147 | } |
148 | ||
149 | return storage; | |
150 | } | |
151 | ||
706e3705 TT |
152 | /* See objfiles.h. */ |
153 | ||
154 | void | |
155 | set_objfile_per_bfd (struct objfile *objfile) | |
156 | { | |
157 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
158 | } | |
159 | ||
3d548a53 TT |
160 | /* Set the objfile's per-BFD notion of the "main" name and |
161 | language. */ | |
162 | ||
163 | void | |
164 | set_objfile_main_name (struct objfile *objfile, | |
165 | const char *name, enum language lang) | |
166 | { | |
167 | if (objfile->per_bfd->name_of_main == NULL | |
168 | || strcmp (objfile->per_bfd->name_of_main, name) != 0) | |
169 | objfile->per_bfd->name_of_main | |
021887d8 | 170 | = obstack_strdup (&objfile->per_bfd->storage_obstack, 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 | ||
fd361982 | 275 | aflag = bfd_section_flags (asect); |
65cf3563 TT |
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 | } | |
021887d8 | 359 | original_name = obstack_strdup (&objfile_obstack, expanded_name); |
04affae3 | 360 | |
d3e81981 DE |
361 | /* Update the per-objfile information that comes from the bfd, ensuring |
362 | that any data that is reference is saved in the per-objfile data | |
363 | region. */ | |
364 | ||
8ac244b4 | 365 | gdb_bfd_ref (abfd); |
c906108c SS |
366 | if (abfd != NULL) |
367 | { | |
9e86da07 | 368 | mtime = bfd_get_mtime (abfd); |
c906108c SS |
369 | |
370 | /* Build section table. */ | |
9e86da07 | 371 | build_objfile_section_table (this); |
c906108c SS |
372 | } |
373 | ||
9e86da07 | 374 | per_bfd = get_objfile_bfd_data (this, abfd); |
c906108c SS |
375 | } |
376 | ||
5e2b427d | 377 | /* Retrieve the gdbarch associated with OBJFILE. */ |
9c1877ea | 378 | |
5e2b427d | 379 | struct gdbarch * |
9c1877ea | 380 | get_objfile_arch (const struct objfile *objfile) |
5e2b427d | 381 | { |
df6d5441 | 382 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
383 | } |
384 | ||
abd0a5fa JK |
385 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
386 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 387 | |
abd0a5fa JK |
388 | int |
389 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 390 | { |
6ef55de7 | 391 | if (symfile_objfile == NULL || !symfile_objfile->per_bfd->ei.entry_point_p) |
3612b192 DJ |
392 | return 0; |
393 | ||
6ef55de7 | 394 | *entry_p = (symfile_objfile->per_bfd->ei.entry_point |
53eddfa6 | 395 | + ANOFFSET (symfile_objfile->section_offsets, |
6ef55de7 | 396 | symfile_objfile->per_bfd->ei.the_bfd_section_index)); |
3612b192 | 397 | |
abd0a5fa JK |
398 | return 1; |
399 | } | |
400 | ||
401 | /* Get current entry point address. Call error if it is not known. */ | |
402 | ||
403 | CORE_ADDR | |
404 | entry_point_address (void) | |
405 | { | |
406 | CORE_ADDR retval; | |
407 | ||
408 | if (!entry_point_address_query (&retval)) | |
409 | error (_("Entry point address is not known.")); | |
410 | ||
411 | return retval; | |
9ab9195f | 412 | } |
15831452 | 413 | |
e9ad22ee TT |
414 | separate_debug_iterator & |
415 | separate_debug_iterator::operator++ () | |
15d123c9 | 416 | { |
e9ad22ee TT |
417 | gdb_assert (m_objfile != nullptr); |
418 | ||
15d123c9 TG |
419 | struct objfile *res; |
420 | ||
399f313b | 421 | /* If any, return the first child. */ |
e9ad22ee TT |
422 | res = m_objfile->separate_debug_objfile; |
423 | if (res != nullptr) | |
424 | { | |
425 | m_objfile = res; | |
426 | return *this; | |
427 | } | |
15d123c9 | 428 | |
15d123c9 | 429 | /* Common case where there is no separate debug objfile. */ |
e9ad22ee TT |
430 | if (m_objfile == m_parent) |
431 | { | |
432 | m_objfile = nullptr; | |
433 | return *this; | |
434 | } | |
15d123c9 | 435 | |
399f313b TG |
436 | /* Return the brother if any. Note that we don't iterate on brothers of |
437 | the parents. */ | |
e9ad22ee TT |
438 | res = m_objfile->separate_debug_objfile_link; |
439 | if (res != nullptr) | |
440 | { | |
441 | m_objfile = res; | |
442 | return *this; | |
443 | } | |
399f313b | 444 | |
e9ad22ee TT |
445 | for (res = m_objfile->separate_debug_objfile_backlink; |
446 | res != m_parent; | |
15d123c9 TG |
447 | res = res->separate_debug_objfile_backlink) |
448 | { | |
e9ad22ee TT |
449 | gdb_assert (res != nullptr); |
450 | if (res->separate_debug_objfile_link != nullptr) | |
451 | { | |
452 | m_objfile = res->separate_debug_objfile_link; | |
453 | return *this; | |
454 | } | |
15d123c9 | 455 | } |
e9ad22ee TT |
456 | m_objfile = nullptr; |
457 | return *this; | |
15d123c9 | 458 | } |
15831452 | 459 | |
15d123c9 TG |
460 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
461 | ||
f65fe570 | 462 | static void |
15d123c9 TG |
463 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) |
464 | { | |
465 | gdb_assert (objfile && parent); | |
466 | ||
467 | /* Must not be already in a list. */ | |
468 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
469 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
470 | gdb_assert (objfile->separate_debug_objfile == NULL); |
471 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
472 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
473 | |
474 | objfile->separate_debug_objfile_backlink = parent; | |
475 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
476 | parent->separate_debug_objfile = objfile; | |
15d123c9 TG |
477 | } |
478 | ||
f65fe570 TT |
479 | /* See objfiles.h. */ |
480 | ||
481 | objfile * | |
482 | objfile::make (bfd *bfd_, const char *name_, objfile_flags flags_, | |
483 | objfile *parent) | |
484 | { | |
485 | objfile *result = new objfile (bfd_, name_, flags_); | |
486 | if (parent != nullptr) | |
487 | add_separate_debug_objfile (result, parent); | |
7cac64af TT |
488 | |
489 | current_program_space->add_objfile (result, parent); | |
490 | ||
491 | /* Rebuild section map next time we need it. */ | |
492 | get_objfile_pspace_data (current_program_space)->new_objfiles_available = 1; | |
493 | ||
f65fe570 TT |
494 | return result; |
495 | } | |
496 | ||
268e4f09 TT |
497 | /* See objfiles.h. */ |
498 | ||
499 | void | |
500 | objfile::unlink () | |
501 | { | |
23452926 | 502 | current_program_space->remove_objfile (this); |
268e4f09 TT |
503 | delete this; |
504 | } | |
505 | ||
15d123c9 TG |
506 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE |
507 | itself. */ | |
508 | ||
509 | void | |
510 | free_objfile_separate_debug (struct objfile *objfile) | |
511 | { | |
512 | struct objfile *child; | |
513 | ||
514 | for (child = objfile->separate_debug_objfile; child;) | |
515 | { | |
516 | struct objfile *next_child = child->separate_debug_objfile_link; | |
268e4f09 | 517 | child->unlink (); |
15d123c9 TG |
518 | child = next_child; |
519 | } | |
520 | } | |
c906108c | 521 | |
7580e917 | 522 | /* Destroy an objfile and all the symtabs and psymtabs under it. */ |
c906108c | 523 | |
9e86da07 | 524 | objfile::~objfile () |
c906108c | 525 | { |
63644780 | 526 | /* First notify observers that this objfile is about to be freed. */ |
76727919 | 527 | gdb::observers::free_objfile.notify (this); |
63644780 | 528 | |
15d123c9 | 529 | /* Free all separate debug objfiles. */ |
9e86da07 | 530 | free_objfile_separate_debug (this); |
15d123c9 | 531 | |
9e86da07 | 532 | if (separate_debug_objfile_backlink) |
5b5d99cf JB |
533 | { |
534 | /* We freed the separate debug file, make sure the base objfile | |
535 | doesn't reference it. */ | |
15d123c9 TG |
536 | struct objfile *child; |
537 | ||
9e86da07 | 538 | child = separate_debug_objfile_backlink->separate_debug_objfile; |
15d123c9 | 539 | |
9e86da07 | 540 | if (child == this) |
15d123c9 | 541 | { |
9e86da07 TT |
542 | /* THIS is the first child. */ |
543 | separate_debug_objfile_backlink->separate_debug_objfile = | |
544 | separate_debug_objfile_link; | |
15d123c9 TG |
545 | } |
546 | else | |
547 | { | |
9e86da07 | 548 | /* Find THIS in the list. */ |
15d123c9 TG |
549 | while (1) |
550 | { | |
9e86da07 | 551 | if (child->separate_debug_objfile_link == this) |
15d123c9 TG |
552 | { |
553 | child->separate_debug_objfile_link = | |
9e86da07 | 554 | separate_debug_objfile_link; |
15d123c9 TG |
555 | break; |
556 | } | |
557 | child = child->separate_debug_objfile_link; | |
558 | gdb_assert (child); | |
559 | } | |
560 | } | |
5b5d99cf | 561 | } |
9e86da07 | 562 | |
ae5a43e0 DJ |
563 | /* Remove any references to this objfile in the global value |
564 | lists. */ | |
9e86da07 | 565 | preserve_values (this); |
ae5a43e0 | 566 | |
9f743ef6 JK |
567 | /* It still may reference data modules have associated with the objfile and |
568 | the symbol file data. */ | |
9e86da07 | 569 | forget_cached_source_info_for_objfile (this); |
9f743ef6 | 570 | |
9e86da07 TT |
571 | breakpoint_free_objfile (this); |
572 | btrace_free_objfile (this); | |
2f202fde | 573 | |
c906108c SS |
574 | /* First do any symbol file specific actions required when we are |
575 | finished with a particular symbol file. Note that if the objfile | |
576 | is using reusable symbol information (via mmalloc) then each of | |
577 | these routines is responsible for doing the correct thing, either | |
578 | freeing things which are valid only during this particular gdb | |
0df8b418 | 579 | execution, or leaving them to be reused during the next one. */ |
c906108c | 580 | |
9e86da07 TT |
581 | if (sf != NULL) |
582 | (*sf->sym_finish) (this); | |
c906108c | 583 | |
9f743ef6 | 584 | /* Discard any data modules have associated with the objfile. The function |
9e86da07 TT |
585 | still may reference obfd. */ |
586 | objfile_free_data (this); | |
c5bc3a77 | 587 | |
9e86da07 TT |
588 | if (obfd) |
589 | gdb_bfd_unref (obfd); | |
706e3705 | 590 | else |
d6797f46 | 591 | delete per_bfd; |
c906108c | 592 | |
c906108c SS |
593 | /* Before the symbol table code was redone to make it easier to |
594 | selectively load and remove information particular to a specific | |
595 | linkage unit, gdb used to do these things whenever the monolithic | |
596 | symbol table was blown away. How much still needs to be done | |
597 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 598 | it is shown to be no longer needed. */ |
c5aa993b | 599 | |
cb5d864f FF |
600 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
601 | for example), so we need to call this here. */ | |
c906108c SS |
602 | clear_pc_function_cache (); |
603 | ||
cb5d864f | 604 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 605 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
606 | |
607 | { | |
608 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 609 | |
9e86da07 | 610 | if (cursal.symtab && SYMTAB_OBJFILE (cursal.symtab) == this) |
00174a86 | 611 | clear_current_source_symtab_and_line (); |
cb5d864f FF |
612 | } |
613 | ||
0df8b418 | 614 | /* Free the obstacks for non-reusable objfiles. */ |
9e86da07 | 615 | obstack_free (&objfile_obstack, 0); |
6c95b8df PA |
616 | |
617 | /* Rebuild section map next time we need it. */ | |
9e86da07 | 618 | get_objfile_pspace_data (pspace)->section_map_dirty = 1; |
c906108c SS |
619 | } |
620 | ||
c906108c SS |
621 | /* Free all the object files at once and clean up their users. */ |
622 | ||
623 | void | |
fba45db2 | 624 | free_all_objfiles (void) |
c906108c | 625 | { |
0133421a JK |
626 | struct so_list *so; |
627 | ||
ee371134 | 628 | /* Any objfile reference would become stale. */ |
0133421a JK |
629 | for (so = master_so_list (); so; so = so->next) |
630 | gdb_assert (so->objfile == NULL); | |
c906108c | 631 | |
7e955d83 | 632 | for (objfile *objfile : current_program_space->objfiles_safe ()) |
268e4f09 | 633 | objfile->unlink (); |
c1e56572 | 634 | clear_symtab_users (0); |
c906108c SS |
635 | } |
636 | \f | |
34eaf542 TT |
637 | /* A helper function for objfile_relocate1 that relocates a single |
638 | symbol. */ | |
639 | ||
640 | static void | |
641 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
642 | struct section_offsets *delta) | |
643 | { | |
644 | fixup_symbol_section (sym, objfile); | |
645 | ||
646 | /* The RS6000 code from which this was taken skipped | |
647 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
648 | But I'm leaving out that test, on the theory that | |
649 | they can't possibly pass the tests below. */ | |
650 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
651 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
652 | && SYMBOL_SECTION (sym) >= 0) | |
653 | { | |
38583298 TT |
654 | SET_SYMBOL_VALUE_ADDRESS (sym, |
655 | SYMBOL_VALUE_ADDRESS (sym) | |
656 | + ANOFFSET (delta, SYMBOL_SECTION (sym))); | |
34eaf542 TT |
657 | } |
658 | } | |
659 | ||
c906108c | 660 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
661 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
662 | Return non-zero iff any change happened. */ | |
567995e1 | 663 | |
b260e109 | 664 | static int |
5cc80db3 | 665 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 666 | const struct section_offsets *new_offsets) |
c906108c | 667 | { |
d4f3574e | 668 | struct section_offsets *delta = |
a39a16c4 MM |
669 | ((struct section_offsets *) |
670 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 671 | |
5cc80db3 MS |
672 | int something_changed = 0; |
673 | ||
b926417a | 674 | for (int i = 0; i < objfile->num_sections; ++i) |
5cc80db3 MS |
675 | { |
676 | delta->offsets[i] = | |
677 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
678 | if (ANOFFSET (delta, i) != 0) | |
679 | something_changed = 1; | |
680 | } | |
681 | if (!something_changed) | |
682 | return 0; | |
c906108c SS |
683 | |
684 | /* OK, get all the symtabs. */ | |
685 | { | |
b669c953 | 686 | for (compunit_symtab *cust : objfile->compunits ()) |
d5da8b3c TT |
687 | { |
688 | for (symtab *s : compunit_filetabs (cust)) | |
689 | { | |
690 | struct linetable *l; | |
691 | ||
692 | /* First the line table. */ | |
693 | l = SYMTAB_LINETABLE (s); | |
694 | if (l) | |
695 | { | |
696 | for (int i = 0; i < l->nitems; ++i) | |
697 | l->item[i].pc += ANOFFSET (delta, | |
698 | COMPUNIT_BLOCK_LINE_SECTION | |
699 | (cust)); | |
700 | } | |
701 | } | |
702 | } | |
c906108c | 703 | |
b669c953 | 704 | for (compunit_symtab *cust : objfile->compunits ()) |
592553c4 TT |
705 | { |
706 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (cust); | |
707 | int block_line_section = COMPUNIT_BLOCK_LINE_SECTION (cust); | |
708 | ||
709 | if (BLOCKVECTOR_MAP (bv)) | |
710 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
711 | ANOFFSET (delta, block_line_section)); | |
712 | ||
713 | for (int i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) | |
714 | { | |
715 | struct block *b; | |
716 | struct symbol *sym; | |
b026f593 | 717 | struct mdict_iterator miter; |
592553c4 TT |
718 | |
719 | b = BLOCKVECTOR_BLOCK (bv, i); | |
720 | BLOCK_START (b) += ANOFFSET (delta, block_line_section); | |
721 | BLOCK_END (b) += ANOFFSET (delta, block_line_section); | |
722 | ||
723 | if (BLOCK_RANGES (b) != nullptr) | |
724 | for (int j = 0; j < BLOCK_NRANGES (b); j++) | |
725 | { | |
726 | BLOCK_RANGE_START (b, j) | |
727 | += ANOFFSET (delta, block_line_section); | |
728 | BLOCK_RANGE_END (b, j) += ANOFFSET (delta, | |
729 | block_line_section); | |
730 | } | |
731 | ||
732 | /* We only want to iterate over the local symbols, not any | |
733 | symbols in included symtabs. */ | |
b026f593 | 734 | ALL_DICT_SYMBOLS (BLOCK_MULTIDICT (b), miter, sym) |
9644dc3a | 735 | { |
592553c4 | 736 | relocate_one_symbol (sym, objfile, delta); |
9644dc3a | 737 | } |
592553c4 TT |
738 | } |
739 | } | |
c906108c SS |
740 | } |
741 | ||
79748972 TT |
742 | /* This stores relocated addresses and so must be cleared. This |
743 | will cause it to be recreated on demand. */ | |
744 | objfile->psymbol_map.clear (); | |
745 | ||
34eaf542 TT |
746 | /* Relocate isolated symbols. */ |
747 | { | |
748 | struct symbol *iter; | |
749 | ||
750 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
751 | relocate_one_symbol (iter, objfile, delta); | |
752 | } | |
753 | ||
f1f2b5f4 PA |
754 | { |
755 | int i; | |
5cc80db3 | 756 | |
f1f2b5f4 PA |
757 | for (i = 0; i < objfile->num_sections; ++i) |
758 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
759 | } | |
760 | ||
761 | /* Rebuild section map next time we need it. */ | |
607ece04 | 762 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 763 | |
30510692 | 764 | /* Update the table in exec_ops, used to read memory. */ |
b926417a | 765 | struct obj_section *s; |
30510692 DJ |
766 | ALL_OBJFILE_OSECTIONS (objfile, s) |
767 | { | |
65cf3563 | 768 | int idx = s - objfile->sections; |
30510692 DJ |
769 | |
770 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 771 | obj_section_addr (s)); |
30510692 | 772 | } |
b260e109 JK |
773 | |
774 | /* Data changed. */ | |
775 | return 1; | |
567995e1 JK |
776 | } |
777 | ||
778 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
779 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
780 | ||
781 | The number and ordering of sections does differ between the two objfiles. | |
782 | Only their names match. Also the file offsets will differ (objfile being | |
783 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
784 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
785 | files. */ | |
786 | ||
787 | void | |
3189cb12 DE |
788 | objfile_relocate (struct objfile *objfile, |
789 | const struct section_offsets *new_offsets) | |
567995e1 | 790 | { |
b260e109 | 791 | int changed = 0; |
567995e1 | 792 | |
b260e109 | 793 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 | 794 | |
bde09ab7 | 795 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
567995e1 | 796 | { |
e9ad22ee TT |
797 | if (debug_objfile == objfile) |
798 | continue; | |
799 | ||
37e136b1 TT |
800 | section_addr_info objfile_addrs |
801 | = build_section_addr_info_from_objfile (objfile); | |
567995e1 JK |
802 | |
803 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
804 | relative ones must be already created according to debug_objfile. */ | |
805 | ||
37e136b1 | 806 | addr_info_make_relative (&objfile_addrs, debug_objfile->obfd); |
567995e1 JK |
807 | |
808 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 809 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
cfe826d4 TT |
810 | std::vector<struct section_offsets> |
811 | new_debug_offsets (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
812 | relative_addr_info_to_section_offsets (new_debug_offsets.data (), | |
567995e1 JK |
813 | debug_objfile->num_sections, |
814 | objfile_addrs); | |
815 | ||
cfe826d4 | 816 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets.data ()); |
567995e1 | 817 | } |
30510692 | 818 | |
0df8b418 | 819 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
820 | if (changed) |
821 | breakpoint_re_set (); | |
c906108c | 822 | } |
4141a416 JB |
823 | |
824 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
825 | not touched here. | |
826 | Return non-zero iff any change happened. */ | |
827 | ||
828 | static int | |
829 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
830 | { | |
831 | struct section_offsets *new_offsets = | |
832 | ((struct section_offsets *) | |
833 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
834 | int i; | |
835 | ||
836 | for (i = 0; i < objfile->num_sections; ++i) | |
837 | new_offsets->offsets[i] = slide; | |
838 | ||
839 | return objfile_relocate1 (objfile, new_offsets); | |
840 | } | |
841 | ||
842 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
843 | SEPARATE_DEBUG_OBJFILEs. */ | |
844 | ||
845 | void | |
846 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
847 | { | |
4141a416 JB |
848 | int changed = 0; |
849 | ||
bde09ab7 | 850 | for (::objfile *debug_objfile : objfile->separate_debug_objfiles ()) |
4141a416 JB |
851 | changed |= objfile_rebase1 (debug_objfile, slide); |
852 | ||
853 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
854 | if (changed) | |
855 | breakpoint_re_set (); | |
856 | } | |
c906108c | 857 | \f |
55333a84 DE |
858 | /* Return non-zero if OBJFILE has partial symbols. */ |
859 | ||
860 | int | |
861 | objfile_has_partial_symbols (struct objfile *objfile) | |
862 | { | |
b11896a5 TT |
863 | if (!objfile->sf) |
864 | return 0; | |
3e03848b JK |
865 | |
866 | /* If we have not read psymbols, but we have a function capable of reading | |
867 | them, then that is an indication that they are in fact available. Without | |
868 | this function the symbols may have been already read in but they also may | |
869 | not be present in this objfile. */ | |
870 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
871 | && objfile->sf->sym_read_psymbols != NULL) | |
872 | return 1; | |
873 | ||
b11896a5 | 874 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
875 | } |
876 | ||
877 | /* Return non-zero if OBJFILE has full symbols. */ | |
878 | ||
879 | int | |
880 | objfile_has_full_symbols (struct objfile *objfile) | |
881 | { | |
43f3e411 | 882 | return objfile->compunit_symtabs != NULL; |
55333a84 DE |
883 | } |
884 | ||
e361b228 | 885 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 886 | or through a separate debug file. */ |
e361b228 TG |
887 | |
888 | int | |
889 | objfile_has_symbols (struct objfile *objfile) | |
890 | { | |
bde09ab7 | 891 | for (::objfile *o : objfile->separate_debug_objfiles ()) |
15d123c9 TG |
892 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) |
893 | return 1; | |
e361b228 TG |
894 | return 0; |
895 | } | |
896 | ||
897 | ||
c906108c SS |
898 | /* Many places in gdb want to test just to see if we have any partial |
899 | symbols available. This function returns zero if none are currently | |
0df8b418 | 900 | available, nonzero otherwise. */ |
c906108c SS |
901 | |
902 | int | |
fba45db2 | 903 | have_partial_symbols (void) |
c906108c | 904 | { |
2030c079 | 905 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
906 | { |
907 | if (objfile_has_partial_symbols (ofp)) | |
908 | return 1; | |
909 | } | |
c906108c SS |
910 | return 0; |
911 | } | |
912 | ||
913 | /* Many places in gdb want to test just to see if we have any full | |
914 | symbols available. This function returns zero if none are currently | |
0df8b418 | 915 | available, nonzero otherwise. */ |
c906108c SS |
916 | |
917 | int | |
fba45db2 | 918 | have_full_symbols (void) |
c906108c | 919 | { |
2030c079 | 920 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
921 | { |
922 | if (objfile_has_full_symbols (ofp)) | |
923 | return 1; | |
924 | } | |
c906108c SS |
925 | return 0; |
926 | } | |
927 | ||
928 | ||
929 | /* This operations deletes all objfile entries that represent solibs that | |
930 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
931 | command. */ |
932 | ||
c906108c | 933 | void |
fba45db2 | 934 | objfile_purge_solibs (void) |
c906108c | 935 | { |
7e955d83 | 936 | for (objfile *objf : current_program_space->objfiles_safe ()) |
cac85af2 TT |
937 | { |
938 | /* We assume that the solib package has been purged already, or will | |
939 | be soon. */ | |
0df8b418 | 940 | |
cac85af2 | 941 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
268e4f09 | 942 | objf->unlink (); |
cac85af2 | 943 | } |
c906108c SS |
944 | } |
945 | ||
946 | ||
947 | /* Many places in gdb want to test just to see if we have any minimal | |
948 | symbols available. This function returns zero if none are currently | |
0df8b418 | 949 | available, nonzero otherwise. */ |
c906108c SS |
950 | |
951 | int | |
fba45db2 | 952 | have_minimal_symbols (void) |
c906108c | 953 | { |
2030c079 | 954 | for (objfile *ofp : current_program_space->objfiles ()) |
aed57c53 TT |
955 | { |
956 | if (ofp->per_bfd->minimal_symbol_count > 0) | |
957 | { | |
958 | return 1; | |
959 | } | |
960 | } | |
c906108c SS |
961 | return 0; |
962 | } | |
963 | ||
a845f5cb PP |
964 | /* Qsort comparison function. */ |
965 | ||
39ef2f62 CB |
966 | static bool |
967 | sort_cmp (const struct obj_section *sect1, const obj_section *sect2) | |
a845f5cb | 968 | { |
a845f5cb PP |
969 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); |
970 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
971 | ||
972 | if (sect1_addr < sect2_addr) | |
39ef2f62 | 973 | return true; |
a845f5cb | 974 | else if (sect1_addr > sect2_addr) |
39ef2f62 | 975 | return false; |
6fbf07cd | 976 | else |
5cc80db3 MS |
977 | { |
978 | /* Sections are at the same address. This could happen if | |
979 | A) we have an objfile and a separate debuginfo. | |
980 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 981 | or something like that. */ |
5cc80db3 MS |
982 | |
983 | const struct objfile *const objfile1 = sect1->objfile; | |
984 | const struct objfile *const objfile2 = sect2->objfile; | |
985 | ||
986 | if (objfile1->separate_debug_objfile == objfile2 | |
987 | || objfile2->separate_debug_objfile == objfile1) | |
988 | { | |
989 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
990 | will be filtered out later. */ | |
991 | ||
39ef2f62 | 992 | return false; |
5cc80db3 MS |
993 | } |
994 | ||
995 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
996 | triage. This section could be slow (since we iterate over all | |
39ef2f62 | 997 | objfiles in each call to sort_cmp), but this shouldn't happen |
5cc80db3 MS |
998 | very often (GDB is already in a confused state; one hopes this |
999 | doesn't happen at all). If you discover that significant time is | |
1000 | spent in the loops below, do 'set complaints 100' and examine the | |
1001 | resulting complaints. */ | |
5cc80db3 MS |
1002 | if (objfile1 == objfile2) |
1003 | { | |
45f47c3a AB |
1004 | /* Both sections came from the same objfile. We are really |
1005 | confused. Sort on sequence order of sections within the | |
1006 | objfile. The order of checks is important here, if we find a | |
1007 | match on SECT2 first then either SECT2 is before SECT1, or, | |
1008 | SECT2 == SECT1, in both cases we should return false. The | |
1009 | second case shouldn't occur during normal use, but std::sort | |
1010 | does check that '!(a < a)' when compiled in debug mode. */ | |
5cc80db3 MS |
1011 | |
1012 | const struct obj_section *osect; | |
1013 | ||
1014 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
45f47c3a | 1015 | if (osect == sect2) |
39ef2f62 | 1016 | return false; |
45f47c3a AB |
1017 | else if (osect == sect1) |
1018 | return true; | |
5cc80db3 MS |
1019 | |
1020 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1021 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1022 | } |
1023 | else | |
1024 | { | |
1025 | /* Sort on sequence number of the objfile in the chain. */ | |
1026 | ||
2030c079 | 1027 | for (objfile *objfile : current_program_space->objfiles ()) |
5cc80db3 | 1028 | if (objfile == objfile1) |
39ef2f62 | 1029 | return true; |
5cc80db3 | 1030 | else if (objfile == objfile2) |
39ef2f62 | 1031 | return false; |
5cc80db3 MS |
1032 | |
1033 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1034 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1035 | } |
1036 | } | |
6fbf07cd PP |
1037 | |
1038 | /* Unreachable. */ | |
f3574227 | 1039 | gdb_assert_not_reached ("unexpected code path"); |
39ef2f62 | 1040 | return false; |
a845f5cb PP |
1041 | } |
1042 | ||
3aad21cf PP |
1043 | /* Select "better" obj_section to keep. We prefer the one that came from |
1044 | the real object, rather than the one from separate debuginfo. | |
1045 | Most of the time the two sections are exactly identical, but with | |
1046 | prelinking the .rel.dyn section in the real object may have different | |
1047 | size. */ | |
1048 | ||
1049 | static struct obj_section * | |
1050 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1051 | { | |
1052 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1053 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1054 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1055 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1056 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1057 | ||
1058 | if (a->objfile->separate_debug_objfile != NULL) | |
1059 | return a; | |
1060 | return b; | |
1061 | } | |
1062 | ||
6fbf07cd PP |
1063 | /* Return 1 if SECTION should be inserted into the section map. |
1064 | We want to insert only non-overlay and non-TLS section. */ | |
1065 | ||
1066 | static int | |
1067 | insert_section_p (const struct bfd *abfd, | |
1068 | const struct bfd_section *section) | |
1069 | { | |
fd361982 | 1070 | const bfd_vma lma = bfd_section_lma (section); |
6fbf07cd | 1071 | |
fd361982 | 1072 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (section) |
6fbf07cd PP |
1073 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1074 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1075 | discarding sections from the "system supplied DSO" (aka vdso) | |
1076 | on some Linux systems (e.g. Fedora 11). */ | |
1077 | return 0; | |
fd361982 | 1078 | if ((bfd_section_flags (section) & SEC_THREAD_LOCAL) != 0) |
6fbf07cd PP |
1079 | /* This is a TLS section. */ |
1080 | return 0; | |
1081 | ||
1082 | return 1; | |
1083 | } | |
1084 | ||
1085 | /* Filter out overlapping sections where one section came from the real | |
1086 | objfile, and the other from a separate debuginfo file. | |
1087 | Return the size of table after redundant sections have been eliminated. */ | |
1088 | ||
1089 | static int | |
1090 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1091 | { | |
1092 | int i, j; | |
1093 | ||
1094 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1095 | { | |
1096 | struct obj_section *const sect1 = map[i]; | |
1097 | struct obj_section *const sect2 = map[i + 1]; | |
1098 | const struct objfile *const objfile1 = sect1->objfile; | |
1099 | const struct objfile *const objfile2 = sect2->objfile; | |
1100 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1101 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1102 | ||
1103 | if (sect1_addr == sect2_addr | |
1104 | && (objfile1->separate_debug_objfile == objfile2 | |
1105 | || objfile2->separate_debug_objfile == objfile1)) | |
1106 | { | |
1107 | map[j++] = preferred_obj_section (sect1, sect2); | |
1108 | ++i; | |
1109 | } | |
1110 | else | |
1111 | map[j++] = sect1; | |
1112 | } | |
1113 | ||
1114 | if (i < map_size) | |
1115 | { | |
1116 | gdb_assert (i == map_size - 1); | |
1117 | map[j++] = map[i]; | |
1118 | } | |
1119 | ||
1120 | /* The map should not have shrunk to less than half the original size. */ | |
1121 | gdb_assert (map_size / 2 <= j); | |
1122 | ||
1123 | return j; | |
1124 | } | |
1125 | ||
1126 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1127 | Overlapping sections could really be overlay sections which we didn't | |
1128 | classify as such in insert_section_p, or we could be dealing with a | |
1129 | corrupt binary. */ | |
1130 | ||
1131 | static int | |
1132 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1133 | { | |
1134 | int i, j; | |
1135 | ||
1136 | for (i = 0, j = 0; i < map_size - 1; ) | |
1137 | { | |
1138 | int k; | |
1139 | ||
1140 | map[j++] = map[i]; | |
1141 | for (k = i + 1; k < map_size; k++) | |
1142 | { | |
1143 | struct obj_section *const sect1 = map[i]; | |
1144 | struct obj_section *const sect2 = map[k]; | |
1145 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1146 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1147 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1148 | ||
1149 | gdb_assert (sect1_addr <= sect2_addr); | |
1150 | ||
1151 | if (sect1_endaddr <= sect2_addr) | |
1152 | break; | |
1153 | else | |
1154 | { | |
1155 | /* We have an overlap. Report it. */ | |
1156 | ||
1157 | struct objfile *const objf1 = sect1->objfile; | |
1158 | struct objfile *const objf2 = sect2->objfile; | |
1159 | ||
6fbf07cd PP |
1160 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1161 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1162 | ||
1163 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1164 | ||
1165 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1166 | ||
b98664d3 | 1167 | complaint (_("unexpected overlap between:\n" |
6fbf07cd PP |
1168 | " (A) section `%s' from `%s' [%s, %s)\n" |
1169 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1170 | "Will ignore section B"), | |
fd361982 | 1171 | bfd_section_name (bfds1), objfile_name (objf1), |
6fbf07cd PP |
1172 | paddress (gdbarch, sect1_addr), |
1173 | paddress (gdbarch, sect1_endaddr), | |
fd361982 | 1174 | bfd_section_name (bfds2), objfile_name (objf2), |
6fbf07cd PP |
1175 | paddress (gdbarch, sect2_addr), |
1176 | paddress (gdbarch, sect2_endaddr)); | |
1177 | } | |
1178 | } | |
1179 | i = k; | |
1180 | } | |
1181 | ||
1182 | if (i < map_size) | |
1183 | { | |
1184 | gdb_assert (i == map_size - 1); | |
1185 | map[j++] = map[i]; | |
1186 | } | |
1187 | ||
1188 | return j; | |
1189 | } | |
1190 | ||
1191 | ||
1192 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1193 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1194 | |
1195 | static void | |
6c95b8df PA |
1196 | update_section_map (struct program_space *pspace, |
1197 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1198 | { |
607ece04 | 1199 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1200 | int alloc_size, map_size, i; |
a845f5cb | 1201 | struct obj_section *s, **map; |
a845f5cb | 1202 | |
607ece04 GB |
1203 | pspace_info = get_objfile_pspace_data (pspace); |
1204 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1205 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1206 | |
1207 | map = *pmap; | |
1208 | xfree (map); | |
1209 | ||
6fbf07cd | 1210 | alloc_size = 0; |
2030c079 | 1211 | for (objfile *objfile : pspace->objfiles ()) |
6c95b8df PA |
1212 | ALL_OBJFILE_OSECTIONS (objfile, s) |
1213 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1214 | alloc_size += 1; | |
a845f5cb | 1215 | |
65a97ab3 PP |
1216 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1217 | if (alloc_size == 0) | |
1218 | { | |
1219 | *pmap = NULL; | |
1220 | *pmap_size = 0; | |
1221 | return; | |
1222 | } | |
1223 | ||
8d749320 | 1224 | map = XNEWVEC (struct obj_section *, alloc_size); |
a845f5cb | 1225 | |
3aad21cf | 1226 | i = 0; |
2030c079 | 1227 | for (objfile *objfile : pspace->objfiles ()) |
6c95b8df PA |
1228 | ALL_OBJFILE_OSECTIONS (objfile, s) |
1229 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1230 | map[i++] = s; | |
a845f5cb | 1231 | |
39ef2f62 | 1232 | std::sort (map, map + alloc_size, sort_cmp); |
6fbf07cd PP |
1233 | map_size = filter_debuginfo_sections(map, alloc_size); |
1234 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1235 | |
6fbf07cd PP |
1236 | if (map_size < alloc_size) |
1237 | /* Some sections were eliminated. Trim excess space. */ | |
224c3ddb | 1238 | map = XRESIZEVEC (struct obj_section *, map, map_size); |
3aad21cf | 1239 | else |
6fbf07cd | 1240 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1241 | |
a845f5cb PP |
1242 | *pmap = map; |
1243 | *pmap_size = map_size; | |
1244 | } | |
1245 | ||
0df8b418 | 1246 | /* Bsearch comparison function. */ |
a845f5cb PP |
1247 | |
1248 | static int | |
1249 | bsearch_cmp (const void *key, const void *elt) | |
1250 | { | |
1251 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1252 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1253 | ||
1254 | if (pc < obj_section_addr (section)) | |
1255 | return -1; | |
1256 | if (pc < obj_section_endaddr (section)) | |
1257 | return 0; | |
1258 | return 1; | |
1259 | } | |
1260 | ||
714835d5 | 1261 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1262 | |
1263 | struct obj_section * | |
714835d5 | 1264 | find_pc_section (CORE_ADDR pc) |
c906108c | 1265 | { |
6c95b8df | 1266 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1267 | struct obj_section *s, **sp; |
c5aa993b | 1268 | |
714835d5 UW |
1269 | /* Check for mapped overlay section first. */ |
1270 | s = find_pc_mapped_section (pc); | |
1271 | if (s) | |
1272 | return s; | |
c906108c | 1273 | |
6c95b8df | 1274 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1275 | if (pspace_info->section_map_dirty |
1276 | || (pspace_info->new_objfiles_available | |
1277 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1278 | { |
6c95b8df PA |
1279 | update_section_map (current_program_space, |
1280 | &pspace_info->sections, | |
1281 | &pspace_info->num_sections); | |
c906108c | 1282 | |
6c95b8df PA |
1283 | /* Don't need updates to section map until objfiles are added, |
1284 | removed or relocated. */ | |
607ece04 GB |
1285 | pspace_info->new_objfiles_available = 0; |
1286 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1287 | } |
1288 | ||
65a97ab3 PP |
1289 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1290 | bsearch be non-NULL. */ | |
1291 | if (pspace_info->sections == NULL) | |
1292 | { | |
1293 | gdb_assert (pspace_info->num_sections == 0); | |
1294 | return NULL; | |
1295 | } | |
1296 | ||
6c95b8df PA |
1297 | sp = (struct obj_section **) bsearch (&pc, |
1298 | pspace_info->sections, | |
1299 | pspace_info->num_sections, | |
1300 | sizeof (*pspace_info->sections), | |
1301 | bsearch_cmp); | |
a845f5cb PP |
1302 | if (sp != NULL) |
1303 | return *sp; | |
714835d5 | 1304 | return NULL; |
c906108c | 1305 | } |
c5aa993b | 1306 | |
c906108c | 1307 | |
3e5d3a5a | 1308 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1309 | |
1310 | int | |
a121b7c1 | 1311 | pc_in_section (CORE_ADDR pc, const char *name) |
c906108c SS |
1312 | { |
1313 | struct obj_section *s; | |
1314 | int retval = 0; | |
c5aa993b JM |
1315 | |
1316 | s = find_pc_section (pc); | |
1317 | ||
c906108c SS |
1318 | retval = (s != NULL |
1319 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1320 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1321 | return (retval); |
c906108c | 1322 | } |
0d0e1a63 MK |
1323 | \f |
1324 | ||
607ece04 | 1325 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1326 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1327 | |
1328 | void | |
bb272892 | 1329 | objfiles_changed (void) |
a845f5cb | 1330 | { |
6c95b8df | 1331 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1332 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1333 | } | |
1334 | ||
1335 | /* See comments in objfiles.h. */ | |
1336 | ||
06424eac | 1337 | scoped_restore_tmpl<int> |
607ece04 GB |
1338 | inhibit_section_map_updates (struct program_space *pspace) |
1339 | { | |
06424eac TT |
1340 | return scoped_restore_tmpl<int> |
1341 | (&get_objfile_pspace_data (pspace)->inhibit_updates, 1); | |
a845f5cb | 1342 | } |
e3c69974 | 1343 | |
63644780 NB |
1344 | /* Return 1 if ADDR maps into one of the sections of OBJFILE and 0 |
1345 | otherwise. */ | |
1346 | ||
1347 | int | |
1348 | is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile) | |
1349 | { | |
1350 | struct obj_section *osect; | |
1351 | ||
1352 | if (objfile == NULL) | |
1353 | return 0; | |
1354 | ||
1355 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
1356 | { | |
1357 | if (section_is_overlay (osect) && !section_is_mapped (osect)) | |
1358 | continue; | |
1359 | ||
1360 | if (obj_section_addr (osect) <= addr | |
1361 | && addr < obj_section_endaddr (osect)) | |
1362 | return 1; | |
1363 | } | |
1364 | return 0; | |
1365 | } | |
1366 | ||
08351840 | 1367 | int |
d03de421 PA |
1368 | shared_objfile_contains_address_p (struct program_space *pspace, |
1369 | CORE_ADDR address) | |
08351840 | 1370 | { |
2030c079 | 1371 | for (objfile *objfile : pspace->objfiles ()) |
08351840 | 1372 | { |
d03de421 | 1373 | if ((objfile->flags & OBJF_SHARED) != 0 |
08351840 PA |
1374 | && is_addr_in_objfile (address, objfile)) |
1375 | return 1; | |
1376 | } | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
19630284 | 1381 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
2030c079 | 1382 | gdbarch method. It is equivalent to use the objfiles iterable, |
19630284 JB |
1383 | searching the objfiles in the order they are stored internally, |
1384 | ignoring CURRENT_OBJFILE. | |
1385 | ||
85102364 | 1386 | On most platforms, it should be close enough to doing the best |
19630284 JB |
1387 | we can without some knowledge specific to the architecture. */ |
1388 | ||
1389 | void | |
1390 | default_iterate_over_objfiles_in_search_order | |
1391 | (struct gdbarch *gdbarch, | |
1392 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1393 | void *cb_data, struct objfile *current_objfile) | |
1394 | { | |
1395 | int stop = 0; | |
19630284 | 1396 | |
2030c079 | 1397 | for (objfile *objfile : current_program_space->objfiles ()) |
19630284 JB |
1398 | { |
1399 | stop = cb (objfile, cb_data); | |
1400 | if (stop) | |
1401 | return; | |
1402 | } | |
1403 | } | |
1404 | ||
e02c96a7 | 1405 | /* See objfiles.h. */ |
4262abfb JK |
1406 | |
1407 | const char * | |
1408 | objfile_name (const struct objfile *objfile) | |
1409 | { | |
24ba069a JK |
1410 | if (objfile->obfd != NULL) |
1411 | return bfd_get_filename (objfile->obfd); | |
1412 | ||
4262abfb JK |
1413 | return objfile->original_name; |
1414 | } | |
1415 | ||
cc485e62 DE |
1416 | /* See objfiles.h. */ |
1417 | ||
e02c96a7 DE |
1418 | const char * |
1419 | objfile_filename (const struct objfile *objfile) | |
1420 | { | |
1421 | if (objfile->obfd != NULL) | |
1422 | return bfd_get_filename (objfile->obfd); | |
1423 | ||
1424 | return NULL; | |
1425 | } | |
1426 | ||
1427 | /* See objfiles.h. */ | |
1428 | ||
cc485e62 DE |
1429 | const char * |
1430 | objfile_debug_name (const struct objfile *objfile) | |
1431 | { | |
1432 | return lbasename (objfile->original_name); | |
1433 | } | |
1434 | ||
015d2e7e DE |
1435 | /* See objfiles.h. */ |
1436 | ||
1437 | const char * | |
1438 | objfile_flavour_name (struct objfile *objfile) | |
1439 | { | |
1440 | if (objfile->obfd != NULL) | |
1441 | return bfd_flavour_name (bfd_get_flavour (objfile->obfd)); | |
1442 | return NULL; | |
1443 | } |