Commit | Line | Data |
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c906108c | 1 | /* GDB routines for manipulating objfiles. |
af5f3db6 | 2 | |
28e7fd62 | 3 | Copyright (C) 1992-2013 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 | ||
0d0e1a63 | 36 | #include "gdb_assert.h" |
c906108c SS |
37 | #include <sys/types.h> |
38 | #include "gdb_stat.h" | |
39 | #include <fcntl.h> | |
04ea0df1 | 40 | #include "gdb_obstack.h" |
c906108c | 41 | #include "gdb_string.h" |
2de7ced7 | 42 | #include "hashtab.h" |
c906108c | 43 | |
7a292a7a | 44 | #include "breakpoint.h" |
fe898f56 | 45 | #include "block.h" |
de4f826b | 46 | #include "dictionary.h" |
cb5d864f | 47 | #include "source.h" |
801e3a5b | 48 | #include "addrmap.h" |
5e2b427d | 49 | #include "arch-utils.h" |
30510692 | 50 | #include "exec.h" |
a845f5cb | 51 | #include "observer.h" |
6fbf07cd | 52 | #include "complaints.h" |
ccefe4c4 | 53 | #include "psymtab.h" |
0133421a | 54 | #include "solist.h" |
cbb099e8 | 55 | #include "gdb_bfd.h" |
afedecd3 | 56 | #include "btrace.h" |
7a292a7a | 57 | |
8e260fc0 TT |
58 | /* Keep a registry of per-objfile data-pointers required by other GDB |
59 | modules. */ | |
c906108c | 60 | |
6b81941e | 61 | DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD) |
0d0e1a63 | 62 | |
c906108c | 63 | /* Externally visible variables that are owned by this module. |
0df8b418 | 64 | See declarations in objfile.h for more info. */ |
c906108c | 65 | |
6c95b8df PA |
66 | struct objfile_pspace_info |
67 | { | |
6c95b8df PA |
68 | struct obj_section **sections; |
69 | int num_sections; | |
607ece04 GB |
70 | |
71 | /* Nonzero if object files have been added since the section map | |
72 | was last updated. */ | |
73 | int new_objfiles_available; | |
74 | ||
75 | /* Nonzero if the section map MUST be updated before use. */ | |
76 | int section_map_dirty; | |
77 | ||
78 | /* Nonzero if section map updates should be inhibited if possible. */ | |
79 | int inhibit_updates; | |
6c95b8df PA |
80 | }; |
81 | ||
82 | /* Per-program-space data key. */ | |
83 | static const struct program_space_data *objfiles_pspace_data; | |
84 | ||
85 | static void | |
86 | objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg) | |
87 | { | |
88 | struct objfile_pspace_info *info; | |
89 | ||
90 | info = program_space_data (pspace, objfiles_pspace_data); | |
91 | if (info != NULL) | |
92 | { | |
93 | xfree (info->sections); | |
94 | xfree (info); | |
95 | } | |
96 | } | |
97 | ||
98 | /* Get the current svr4 data. If none is found yet, add it now. This | |
99 | function always returns a valid object. */ | |
100 | ||
101 | static struct objfile_pspace_info * | |
102 | get_objfile_pspace_data (struct program_space *pspace) | |
103 | { | |
104 | struct objfile_pspace_info *info; | |
105 | ||
106 | info = program_space_data (pspace, objfiles_pspace_data); | |
107 | if (info == NULL) | |
108 | { | |
109 | info = XZALLOC (struct objfile_pspace_info); | |
110 | set_program_space_data (pspace, objfiles_pspace_data, info); | |
111 | } | |
112 | ||
113 | return info; | |
114 | } | |
115 | ||
706e3705 TT |
116 | \f |
117 | ||
118 | /* Per-BFD data key. */ | |
119 | ||
120 | static const struct bfd_data *objfiles_bfd_data; | |
121 | ||
122 | /* Create the per-BFD storage object for OBJFILE. If ABFD is not | |
123 | NULL, and it already has a per-BFD storage object, use that. | |
124 | Otherwise, allocate a new per-BFD storage object. If ABFD is not | |
125 | NULL, the object is allocated on the BFD; otherwise it is allocated | |
126 | on OBJFILE's obstack. Note that it is not safe to call this | |
127 | multiple times for a given OBJFILE -- it can only be called when | |
128 | allocating or re-initializing OBJFILE. */ | |
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) | |
136 | storage = bfd_data (abfd, objfiles_bfd_data); | |
137 | ||
138 | if (storage == NULL) | |
139 | { | |
140 | if (abfd != NULL) | |
141 | { | |
142 | storage = bfd_zalloc (abfd, sizeof (struct objfile_per_bfd_storage)); | |
143 | set_bfd_data (abfd, objfiles_bfd_data, storage); | |
df6d5441 TT |
144 | |
145 | /* Look up the gdbarch associated with the BFD. */ | |
146 | storage->gdbarch = gdbarch_from_bfd (abfd); | |
706e3705 TT |
147 | } |
148 | else | |
149 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
150 | struct objfile_per_bfd_storage); | |
151 | ||
152 | obstack_init (&storage->storage_obstack); | |
153 | storage->filename_cache = bcache_xmalloc (NULL, NULL); | |
6532ff36 | 154 | storage->macro_cache = bcache_xmalloc (NULL, NULL); |
706e3705 TT |
155 | } |
156 | ||
157 | return storage; | |
158 | } | |
159 | ||
160 | /* Free STORAGE. */ | |
161 | ||
162 | static void | |
163 | free_objfile_per_bfd_storage (struct objfile_per_bfd_storage *storage) | |
164 | { | |
165 | bcache_xfree (storage->filename_cache); | |
6532ff36 | 166 | bcache_xfree (storage->macro_cache); |
706e3705 TT |
167 | obstack_free (&storage->storage_obstack, 0); |
168 | } | |
169 | ||
170 | /* A wrapper for free_objfile_per_bfd_storage that can be passed as a | |
171 | cleanup function to the BFD registry. */ | |
172 | ||
173 | static void | |
174 | objfile_bfd_data_free (struct bfd *unused, void *d) | |
175 | { | |
176 | free_objfile_per_bfd_storage (d); | |
177 | } | |
178 | ||
179 | /* See objfiles.h. */ | |
180 | ||
181 | void | |
182 | set_objfile_per_bfd (struct objfile *objfile) | |
183 | { | |
184 | objfile->per_bfd = get_objfile_bfd_data (objfile, objfile->obfd); | |
185 | } | |
186 | ||
187 | \f | |
188 | ||
96baa820 JM |
189 | /* Called via bfd_map_over_sections to build up the section table that |
190 | the objfile references. The objfile contains pointers to the start | |
191 | of the table (objfile->sections) and to the first location after | |
0df8b418 | 192 | the end of the table (objfile->sections_end). */ |
96baa820 | 193 | |
65cf3563 TT |
194 | static void |
195 | add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect, | |
196 | struct objfile *objfile, int force) | |
197 | { | |
198 | struct obj_section *section; | |
199 | ||
200 | if (!force) | |
201 | { | |
202 | flagword aflag; | |
203 | ||
204 | aflag = bfd_get_section_flags (abfd, asect); | |
205 | if (!(aflag & SEC_ALLOC)) | |
206 | return; | |
207 | } | |
208 | ||
209 | section = &objfile->sections[gdb_bfd_section_index (abfd, asect)]; | |
210 | section->objfile = objfile; | |
211 | section->the_bfd_section = asect; | |
212 | section->ovly_mapped = 0; | |
213 | } | |
214 | ||
c906108c | 215 | static void |
7be0c536 | 216 | add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
d82ea6a8 | 217 | void *objfilep) |
c906108c | 218 | { |
65cf3563 | 219 | add_to_objfile_sections_full (abfd, asect, objfilep, 0); |
c906108c SS |
220 | } |
221 | ||
222 | /* Builds a section table for OBJFILE. | |
96baa820 | 223 | |
65cf3563 TT |
224 | Note that the OFFSET and OVLY_MAPPED in each table entry are |
225 | initialized to zero. */ | |
c906108c | 226 | |
d82ea6a8 | 227 | void |
fba45db2 | 228 | build_objfile_section_table (struct objfile *objfile) |
c906108c | 229 | { |
65cf3563 TT |
230 | int count = gdb_bfd_count_sections (objfile->obfd); |
231 | ||
232 | objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
233 | count, | |
234 | struct obj_section); | |
235 | objfile->sections_end = (objfile->sections + count); | |
f1f6aadf PA |
236 | bfd_map_over_sections (objfile->obfd, |
237 | add_to_objfile_sections, (void *) objfile); | |
65cf3563 TT |
238 | |
239 | /* See gdb_bfd_section_index. */ | |
240 | add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1); | |
241 | add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1); | |
242 | add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1); | |
243 | add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1); | |
c906108c SS |
244 | } |
245 | ||
2df3850c JM |
246 | /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
247 | allocate a new objfile struct, fill it in as best we can, link it | |
248 | into the list of all known objfiles, and return a pointer to the | |
249 | new objfile struct. | |
c906108c | 250 | |
2df3850c | 251 | The FLAGS word contains various bits (OBJF_*) that can be taken as |
78a4a9b9 | 252 | requests for specific operations. Other bits like OBJF_SHARED are |
0df8b418 | 253 | simply copied through to the new objfile flags member. */ |
c906108c | 254 | |
eb9a305d DC |
255 | /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
256 | by jv-lang.c, to create an artificial objfile used to hold | |
257 | information about dynamically-loaded Java classes. Unfortunately, | |
258 | that branch of this function doesn't get tested very frequently, so | |
259 | it's prone to breakage. (E.g. at one time the name was set to NULL | |
260 | in that situation, which broke a loop over all names in the dynamic | |
261 | library loader.) If you change this function, please try to leave | |
262 | things in a consistent state even if abfd is NULL. */ | |
263 | ||
c906108c | 264 | struct objfile * |
fba45db2 | 265 | allocate_objfile (bfd *abfd, int flags) |
c906108c | 266 | { |
2f6e5d7e | 267 | struct objfile *objfile; |
c906108c | 268 | |
6a0fa043 | 269 | objfile = (struct objfile *) xzalloc (sizeof (struct objfile)); |
710e1a31 | 270 | objfile->psymbol_cache = psymbol_bcache_init (); |
2f6e5d7e TG |
271 | /* We could use obstack_specify_allocation here instead, but |
272 | gdb_obstack.h specifies the alloc/dealloc functions. */ | |
273 | obstack_init (&objfile->objfile_obstack); | |
274 | terminate_minimal_symbol_table (objfile); | |
c906108c | 275 | |
0d0e1a63 MK |
276 | objfile_alloc_data (objfile); |
277 | ||
c906108c SS |
278 | /* Update the per-objfile information that comes from the bfd, ensuring |
279 | that any data that is reference is saved in the per-objfile data | |
8ac244b4 | 280 | region. */ |
c906108c | 281 | |
cbb099e8 | 282 | objfile->obfd = abfd; |
8ac244b4 | 283 | gdb_bfd_ref (abfd); |
c906108c SS |
284 | if (abfd != NULL) |
285 | { | |
e1507e95 | 286 | objfile->name = bfd_get_filename (abfd); |
c5aa993b | 287 | objfile->mtime = bfd_get_mtime (abfd); |
c906108c SS |
288 | |
289 | /* Build section table. */ | |
d82ea6a8 | 290 | build_objfile_section_table (objfile); |
c906108c | 291 | } |
eb9a305d DC |
292 | else |
293 | { | |
e1507e95 | 294 | objfile->name = "<<anonymous objfile>>"; |
eb9a305d | 295 | } |
c906108c | 296 | |
706e3705 | 297 | objfile->per_bfd = get_objfile_bfd_data (objfile, abfd); |
6c95b8df PA |
298 | objfile->pspace = current_program_space; |
299 | ||
b8fbeb18 | 300 | /* Initialize the section indexes for this objfile, so that we can |
0df8b418 | 301 | later detect if they are used w/o being properly assigned to. */ |
b8fbeb18 | 302 | |
5c4e30ca DC |
303 | objfile->sect_index_text = -1; |
304 | objfile->sect_index_data = -1; | |
305 | objfile->sect_index_bss = -1; | |
306 | objfile->sect_index_rodata = -1; | |
307 | ||
0df8b418 | 308 | /* Add this file onto the tail of the linked list of other such files. */ |
c906108c | 309 | |
c5aa993b | 310 | objfile->next = NULL; |
c906108c SS |
311 | if (object_files == NULL) |
312 | object_files = objfile; | |
313 | else | |
314 | { | |
2f6e5d7e TG |
315 | struct objfile *last_one; |
316 | ||
c906108c | 317 | for (last_one = object_files; |
c5aa993b JM |
318 | last_one->next; |
319 | last_one = last_one->next); | |
320 | last_one->next = objfile; | |
c906108c SS |
321 | } |
322 | ||
0df8b418 | 323 | /* Save passed in flag bits. */ |
2df3850c | 324 | objfile->flags |= flags; |
c906108c | 325 | |
6c95b8df | 326 | /* Rebuild section map next time we need it. */ |
607ece04 | 327 | get_objfile_pspace_data (objfile->pspace)->new_objfiles_available = 1; |
bb272892 | 328 | |
6c95b8df | 329 | return objfile; |
c906108c SS |
330 | } |
331 | ||
5e2b427d UW |
332 | /* Retrieve the gdbarch associated with OBJFILE. */ |
333 | struct gdbarch * | |
334 | get_objfile_arch (struct objfile *objfile) | |
335 | { | |
df6d5441 | 336 | return objfile->per_bfd->gdbarch; |
5e2b427d UW |
337 | } |
338 | ||
abd0a5fa JK |
339 | /* If there is a valid and known entry point, function fills *ENTRY_P with it |
340 | and returns non-zero; otherwise it returns zero. */ | |
9ab9195f | 341 | |
abd0a5fa JK |
342 | int |
343 | entry_point_address_query (CORE_ADDR *entry_p) | |
9ab9195f | 344 | { |
abd0a5fa | 345 | if (symfile_objfile == NULL || !symfile_objfile->ei.entry_point_p) |
3612b192 DJ |
346 | return 0; |
347 | ||
8c2b9656 | 348 | *entry_p = symfile_objfile->ei.entry_point; |
3612b192 | 349 | |
abd0a5fa JK |
350 | return 1; |
351 | } | |
352 | ||
353 | /* Get current entry point address. Call error if it is not known. */ | |
354 | ||
355 | CORE_ADDR | |
356 | entry_point_address (void) | |
357 | { | |
358 | CORE_ADDR retval; | |
359 | ||
360 | if (!entry_point_address_query (&retval)) | |
361 | error (_("Entry point address is not known.")); | |
362 | ||
363 | return retval; | |
9ab9195f | 364 | } |
15831452 | 365 | |
15d123c9 TG |
366 | /* Iterator on PARENT and every separate debug objfile of PARENT. |
367 | The usage pattern is: | |
368 | for (objfile = parent; | |
369 | objfile; | |
370 | objfile = objfile_separate_debug_iterate (parent, objfile)) | |
371 | ... | |
372 | */ | |
373 | ||
374 | struct objfile * | |
375 | objfile_separate_debug_iterate (const struct objfile *parent, | |
376 | const struct objfile *objfile) | |
377 | { | |
378 | struct objfile *res; | |
379 | ||
399f313b | 380 | /* If any, return the first child. */ |
15d123c9 TG |
381 | res = objfile->separate_debug_objfile; |
382 | if (res) | |
383 | return res; | |
384 | ||
15d123c9 TG |
385 | /* Common case where there is no separate debug objfile. */ |
386 | if (objfile == parent) | |
387 | return NULL; | |
388 | ||
399f313b TG |
389 | /* Return the brother if any. Note that we don't iterate on brothers of |
390 | the parents. */ | |
391 | res = objfile->separate_debug_objfile_link; | |
392 | if (res) | |
393 | return res; | |
394 | ||
15d123c9 TG |
395 | for (res = objfile->separate_debug_objfile_backlink; |
396 | res != parent; | |
397 | res = res->separate_debug_objfile_backlink) | |
398 | { | |
399 | gdb_assert (res != NULL); | |
400 | if (res->separate_debug_objfile_link) | |
401 | return res->separate_debug_objfile_link; | |
402 | } | |
403 | return NULL; | |
404 | } | |
15831452 | 405 | |
5b5d99cf JB |
406 | /* Put one object file before a specified on in the global list. |
407 | This can be used to make sure an object file is destroyed before | |
0df8b418 | 408 | another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
5b5d99cf JB |
409 | void |
410 | put_objfile_before (struct objfile *objfile, struct objfile *before_this) | |
411 | { | |
412 | struct objfile **objp; | |
413 | ||
414 | unlink_objfile (objfile); | |
415 | ||
416 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
417 | { | |
418 | if (*objp == before_this) | |
419 | { | |
420 | objfile->next = *objp; | |
421 | *objp = objfile; | |
422 | return; | |
423 | } | |
424 | } | |
425 | ||
426 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 427 | _("put_objfile_before: before objfile not in list")); |
5b5d99cf JB |
428 | } |
429 | ||
c906108c SS |
430 | /* Put OBJFILE at the front of the list. */ |
431 | ||
432 | void | |
fba45db2 | 433 | objfile_to_front (struct objfile *objfile) |
c906108c SS |
434 | { |
435 | struct objfile **objp; | |
436 | for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) | |
437 | { | |
438 | if (*objp == objfile) | |
439 | { | |
440 | /* Unhook it from where it is. */ | |
441 | *objp = objfile->next; | |
442 | /* Put it in the front. */ | |
443 | objfile->next = object_files; | |
444 | object_files = objfile; | |
445 | break; | |
446 | } | |
447 | } | |
448 | } | |
449 | ||
450 | /* Unlink OBJFILE from the list of known objfiles, if it is found in the | |
451 | list. | |
452 | ||
453 | It is not a bug, or error, to call this function if OBJFILE is not known | |
454 | to be in the current list. This is done in the case of mapped objfiles, | |
455 | for example, just to ensure that the mapped objfile doesn't appear twice | |
456 | in the list. Since the list is threaded, linking in a mapped objfile | |
457 | twice would create a circular list. | |
458 | ||
459 | If OBJFILE turns out to be in the list, we zap it's NEXT pointer after | |
460 | unlinking it, just to ensure that we have completely severed any linkages | |
0df8b418 | 461 | between the OBJFILE and the list. */ |
c906108c SS |
462 | |
463 | void | |
fba45db2 | 464 | unlink_objfile (struct objfile *objfile) |
c906108c | 465 | { |
c5aa993b | 466 | struct objfile **objpp; |
c906108c | 467 | |
c5aa993b | 468 | for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
c906108c | 469 | { |
c5aa993b | 470 | if (*objpp == objfile) |
c906108c | 471 | { |
c5aa993b JM |
472 | *objpp = (*objpp)->next; |
473 | objfile->next = NULL; | |
07cd4b97 | 474 | return; |
c906108c SS |
475 | } |
476 | } | |
07cd4b97 | 477 | |
8e65ff28 | 478 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 479 | _("unlink_objfile: objfile already unlinked")); |
c906108c SS |
480 | } |
481 | ||
15d123c9 TG |
482 | /* Add OBJFILE as a separate debug objfile of PARENT. */ |
483 | ||
484 | void | |
485 | add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent) | |
486 | { | |
487 | gdb_assert (objfile && parent); | |
488 | ||
489 | /* Must not be already in a list. */ | |
490 | gdb_assert (objfile->separate_debug_objfile_backlink == NULL); | |
491 | gdb_assert (objfile->separate_debug_objfile_link == NULL); | |
8a92335b JK |
492 | gdb_assert (objfile->separate_debug_objfile == NULL); |
493 | gdb_assert (parent->separate_debug_objfile_backlink == NULL); | |
494 | gdb_assert (parent->separate_debug_objfile_link == NULL); | |
15d123c9 TG |
495 | |
496 | objfile->separate_debug_objfile_backlink = parent; | |
497 | objfile->separate_debug_objfile_link = parent->separate_debug_objfile; | |
498 | parent->separate_debug_objfile = objfile; | |
499 | ||
500 | /* Put the separate debug object before the normal one, this is so that | |
0df8b418 | 501 | usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
15d123c9 TG |
502 | put_objfile_before (objfile, parent); |
503 | } | |
504 | ||
505 | /* Free all separate debug objfile of OBJFILE, but don't free OBJFILE | |
506 | itself. */ | |
507 | ||
508 | void | |
509 | free_objfile_separate_debug (struct objfile *objfile) | |
510 | { | |
511 | struct objfile *child; | |
512 | ||
513 | for (child = objfile->separate_debug_objfile; child;) | |
514 | { | |
515 | struct objfile *next_child = child->separate_debug_objfile_link; | |
516 | free_objfile (child); | |
517 | child = next_child; | |
518 | } | |
519 | } | |
c906108c SS |
520 | |
521 | /* Destroy an objfile and all the symtabs and psymtabs under it. Note | |
4a146b47 EZ |
522 | that as much as possible is allocated on the objfile_obstack |
523 | so that the memory can be efficiently freed. | |
c906108c SS |
524 | |
525 | Things which we do NOT free because they are not in malloc'd memory | |
526 | or not in memory specific to the objfile include: | |
527 | ||
c5aa993b | 528 | objfile -> sf |
c906108c SS |
529 | |
530 | FIXME: If the objfile is using reusable symbol information (via mmalloc), | |
531 | then we need to take into account the fact that more than one process | |
532 | may be using the symbol information at the same time (when mmalloc is | |
533 | extended to support cooperative locking). When more than one process | |
534 | is using the mapped symbol info, we need to be more careful about when | |
0df8b418 | 535 | we free objects in the reusable area. */ |
c906108c SS |
536 | |
537 | void | |
fba45db2 | 538 | free_objfile (struct objfile *objfile) |
c906108c | 539 | { |
15d123c9 TG |
540 | /* Free all separate debug objfiles. */ |
541 | free_objfile_separate_debug (objfile); | |
542 | ||
5b5d99cf JB |
543 | if (objfile->separate_debug_objfile_backlink) |
544 | { | |
545 | /* We freed the separate debug file, make sure the base objfile | |
546 | doesn't reference it. */ | |
15d123c9 TG |
547 | struct objfile *child; |
548 | ||
549 | child = objfile->separate_debug_objfile_backlink->separate_debug_objfile; | |
550 | ||
551 | if (child == objfile) | |
552 | { | |
553 | /* OBJFILE is the first child. */ | |
554 | objfile->separate_debug_objfile_backlink->separate_debug_objfile = | |
555 | objfile->separate_debug_objfile_link; | |
556 | } | |
557 | else | |
558 | { | |
559 | /* Find OBJFILE in the list. */ | |
560 | while (1) | |
561 | { | |
562 | if (child->separate_debug_objfile_link == objfile) | |
563 | { | |
564 | child->separate_debug_objfile_link = | |
565 | objfile->separate_debug_objfile_link; | |
566 | break; | |
567 | } | |
568 | child = child->separate_debug_objfile_link; | |
569 | gdb_assert (child); | |
570 | } | |
571 | } | |
5b5d99cf JB |
572 | } |
573 | ||
ae5a43e0 DJ |
574 | /* Remove any references to this objfile in the global value |
575 | lists. */ | |
576 | preserve_values (objfile); | |
577 | ||
9f743ef6 JK |
578 | /* It still may reference data modules have associated with the objfile and |
579 | the symbol file data. */ | |
580 | forget_cached_source_info_for_objfile (objfile); | |
581 | ||
2f202fde | 582 | breakpoint_free_objfile (objfile); |
afedecd3 | 583 | btrace_free_objfile (objfile); |
2f202fde | 584 | |
c906108c SS |
585 | /* First do any symbol file specific actions required when we are |
586 | finished with a particular symbol file. Note that if the objfile | |
587 | is using reusable symbol information (via mmalloc) then each of | |
588 | these routines is responsible for doing the correct thing, either | |
589 | freeing things which are valid only during this particular gdb | |
0df8b418 | 590 | execution, or leaving them to be reused during the next one. */ |
c906108c | 591 | |
c5aa993b | 592 | if (objfile->sf != NULL) |
c906108c | 593 | { |
c5aa993b | 594 | (*objfile->sf->sym_finish) (objfile); |
c906108c SS |
595 | } |
596 | ||
9f743ef6 JK |
597 | /* Discard any data modules have associated with the objfile. The function |
598 | still may reference objfile->obfd. */ | |
c5bc3a77 DJ |
599 | objfile_free_data (objfile); |
600 | ||
706e3705 TT |
601 | if (objfile->obfd) |
602 | gdb_bfd_unref (objfile->obfd); | |
603 | else | |
604 | free_objfile_per_bfd_storage (objfile->per_bfd); | |
c906108c | 605 | |
0df8b418 | 606 | /* Remove it from the chain of all objfiles. */ |
c906108c SS |
607 | |
608 | unlink_objfile (objfile); | |
609 | ||
adb7f338 JK |
610 | if (objfile == symfile_objfile) |
611 | symfile_objfile = NULL; | |
c906108c | 612 | |
c906108c SS |
613 | /* Before the symbol table code was redone to make it easier to |
614 | selectively load and remove information particular to a specific | |
615 | linkage unit, gdb used to do these things whenever the monolithic | |
616 | symbol table was blown away. How much still needs to be done | |
617 | is unknown, but we play it safe for now and keep each action until | |
0df8b418 | 618 | it is shown to be no longer needed. */ |
c5aa993b | 619 | |
cb5d864f FF |
620 | /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
621 | for example), so we need to call this here. */ | |
c906108c SS |
622 | clear_pc_function_cache (); |
623 | ||
9bdcbae7 DJ |
624 | /* Clear globals which might have pointed into a removed objfile. |
625 | FIXME: It's not clear which of these are supposed to persist | |
626 | between expressions and which ought to be reset each time. */ | |
627 | expression_context_block = NULL; | |
628 | innermost_block = NULL; | |
629 | ||
cb5d864f | 630 | /* Check to see if the current_source_symtab belongs to this objfile, |
0df8b418 | 631 | and if so, call clear_current_source_symtab_and_line. */ |
cb5d864f FF |
632 | |
633 | { | |
634 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); | |
cb5d864f | 635 | |
00174a86 TT |
636 | if (cursal.symtab && cursal.symtab->objfile == objfile) |
637 | clear_current_source_symtab_and_line (); | |
cb5d864f FF |
638 | } |
639 | ||
0df8b418 | 640 | /* The last thing we do is free the objfile struct itself. */ |
c906108c | 641 | |
78a4a9b9 | 642 | if (objfile->global_psymbols.list) |
2dc74dc1 | 643 | xfree (objfile->global_psymbols.list); |
78a4a9b9 | 644 | if (objfile->static_psymbols.list) |
2dc74dc1 | 645 | xfree (objfile->static_psymbols.list); |
0df8b418 | 646 | /* Free the obstacks for non-reusable objfiles. */ |
710e1a31 | 647 | psymbol_bcache_free (objfile->psymbol_cache); |
78a4a9b9 AC |
648 | if (objfile->demangled_names_hash) |
649 | htab_delete (objfile->demangled_names_hash); | |
b99607ea | 650 | obstack_free (&objfile->objfile_obstack, 0); |
6c95b8df PA |
651 | |
652 | /* Rebuild section map next time we need it. */ | |
607ece04 | 653 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
6c95b8df | 654 | |
2dc74dc1 | 655 | xfree (objfile); |
c906108c SS |
656 | } |
657 | ||
74b7792f AC |
658 | static void |
659 | do_free_objfile_cleanup (void *obj) | |
660 | { | |
661 | free_objfile (obj); | |
662 | } | |
663 | ||
664 | struct cleanup * | |
665 | make_cleanup_free_objfile (struct objfile *obj) | |
666 | { | |
667 | return make_cleanup (do_free_objfile_cleanup, obj); | |
668 | } | |
c906108c SS |
669 | |
670 | /* Free all the object files at once and clean up their users. */ | |
671 | ||
672 | void | |
fba45db2 | 673 | free_all_objfiles (void) |
c906108c SS |
674 | { |
675 | struct objfile *objfile, *temp; | |
0133421a JK |
676 | struct so_list *so; |
677 | ||
678 | /* Any objfile referencewould become stale. */ | |
679 | for (so = master_so_list (); so; so = so->next) | |
680 | gdb_assert (so->objfile == NULL); | |
c906108c SS |
681 | |
682 | ALL_OBJFILES_SAFE (objfile, temp) | |
c5aa993b JM |
683 | { |
684 | free_objfile (objfile); | |
685 | } | |
c1e56572 | 686 | clear_symtab_users (0); |
c906108c SS |
687 | } |
688 | \f | |
34eaf542 TT |
689 | /* A helper function for objfile_relocate1 that relocates a single |
690 | symbol. */ | |
691 | ||
692 | static void | |
693 | relocate_one_symbol (struct symbol *sym, struct objfile *objfile, | |
694 | struct section_offsets *delta) | |
695 | { | |
696 | fixup_symbol_section (sym, objfile); | |
697 | ||
698 | /* The RS6000 code from which this was taken skipped | |
699 | any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. | |
700 | But I'm leaving out that test, on the theory that | |
701 | they can't possibly pass the tests below. */ | |
702 | if ((SYMBOL_CLASS (sym) == LOC_LABEL | |
703 | || SYMBOL_CLASS (sym) == LOC_STATIC) | |
704 | && SYMBOL_SECTION (sym) >= 0) | |
705 | { | |
706 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (delta, SYMBOL_SECTION (sym)); | |
707 | } | |
708 | } | |
709 | ||
c906108c | 710 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
b260e109 JK |
711 | entries in new_offsets. SEPARATE_DEBUG_OBJFILE is not touched here. |
712 | Return non-zero iff any change happened. */ | |
567995e1 | 713 | |
b260e109 | 714 | static int |
5cc80db3 | 715 | objfile_relocate1 (struct objfile *objfile, |
3189cb12 | 716 | const struct section_offsets *new_offsets) |
c906108c | 717 | { |
30510692 | 718 | struct obj_section *s; |
d4f3574e | 719 | struct section_offsets *delta = |
a39a16c4 MM |
720 | ((struct section_offsets *) |
721 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
c906108c | 722 | |
5cc80db3 MS |
723 | int i; |
724 | int something_changed = 0; | |
725 | ||
726 | for (i = 0; i < objfile->num_sections; ++i) | |
727 | { | |
728 | delta->offsets[i] = | |
729 | ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); | |
730 | if (ANOFFSET (delta, i) != 0) | |
731 | something_changed = 1; | |
732 | } | |
733 | if (!something_changed) | |
734 | return 0; | |
c906108c SS |
735 | |
736 | /* OK, get all the symtabs. */ | |
737 | { | |
738 | struct symtab *s; | |
739 | ||
740 | ALL_OBJFILE_SYMTABS (objfile, s) | |
c5aa993b JM |
741 | { |
742 | struct linetable *l; | |
743 | struct blockvector *bv; | |
744 | int i; | |
745 | ||
746 | /* First the line table. */ | |
747 | l = LINETABLE (s); | |
748 | if (l) | |
749 | { | |
750 | for (i = 0; i < l->nitems; ++i) | |
751 | l->item[i].pc += ANOFFSET (delta, s->block_line_section); | |
752 | } | |
c906108c | 753 | |
c5aa993b JM |
754 | /* Don't relocate a shared blockvector more than once. */ |
755 | if (!s->primary) | |
756 | continue; | |
c906108c | 757 | |
c5aa993b | 758 | bv = BLOCKVECTOR (s); |
b101f7a1 UW |
759 | if (BLOCKVECTOR_MAP (bv)) |
760 | addrmap_relocate (BLOCKVECTOR_MAP (bv), | |
761 | ANOFFSET (delta, s->block_line_section)); | |
762 | ||
c5aa993b JM |
763 | for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
764 | { | |
765 | struct block *b; | |
e88c90f2 | 766 | struct symbol *sym; |
de4f826b | 767 | struct dict_iterator iter; |
c5aa993b JM |
768 | |
769 | b = BLOCKVECTOR_BLOCK (bv, i); | |
770 | BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); | |
771 | BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); | |
772 | ||
8157b174 TT |
773 | /* We only want to iterate over the local symbols, not any |
774 | symbols in included symtabs. */ | |
775 | ALL_DICT_SYMBOLS (BLOCK_DICT (b), iter, sym) | |
c5aa993b | 776 | { |
34eaf542 | 777 | relocate_one_symbol (sym, objfile, delta); |
c5aa993b JM |
778 | } |
779 | } | |
780 | } | |
c906108c SS |
781 | } |
782 | ||
34eaf542 TT |
783 | /* Relocate isolated symbols. */ |
784 | { | |
785 | struct symbol *iter; | |
786 | ||
787 | for (iter = objfile->template_symbols; iter; iter = iter->hash_next) | |
788 | relocate_one_symbol (iter, objfile, delta); | |
789 | } | |
790 | ||
9b14d7aa JK |
791 | if (objfile->psymtabs_addrmap) |
792 | addrmap_relocate (objfile->psymtabs_addrmap, | |
793 | ANOFFSET (delta, SECT_OFF_TEXT (objfile))); | |
794 | ||
ccefe4c4 TT |
795 | if (objfile->sf) |
796 | objfile->sf->qf->relocate (objfile, new_offsets, delta); | |
c906108c SS |
797 | |
798 | { | |
799 | struct minimal_symbol *msym; | |
5cc80db3 | 800 | |
c906108c SS |
801 | ALL_OBJFILE_MSYMBOLS (objfile, msym) |
802 | if (SYMBOL_SECTION (msym) >= 0) | |
c5aa993b | 803 | SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
c906108c SS |
804 | } |
805 | /* Relocating different sections by different amounts may cause the symbols | |
806 | to be out of order. */ | |
807 | msymbols_sort (objfile); | |
808 | ||
abd0a5fa | 809 | if (objfile->ei.entry_point_p) |
36b0c0e0 PS |
810 | { |
811 | /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT | |
812 | only as a fallback. */ | |
813 | struct obj_section *s; | |
814 | s = find_pc_section (objfile->ei.entry_point); | |
815 | if (s) | |
65cf3563 TT |
816 | { |
817 | int idx = gdb_bfd_section_index (objfile->obfd, s->the_bfd_section); | |
818 | ||
819 | objfile->ei.entry_point += ANOFFSET (delta, idx); | |
820 | } | |
36b0c0e0 PS |
821 | else |
822 | objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); | |
823 | } | |
824 | ||
f1f2b5f4 PA |
825 | { |
826 | int i; | |
5cc80db3 | 827 | |
f1f2b5f4 PA |
828 | for (i = 0; i < objfile->num_sections; ++i) |
829 | (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); | |
830 | } | |
831 | ||
832 | /* Rebuild section map next time we need it. */ | |
607ece04 | 833 | get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1; |
f1f2b5f4 | 834 | |
30510692 DJ |
835 | /* Update the table in exec_ops, used to read memory. */ |
836 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
837 | { | |
65cf3563 | 838 | int idx = s - objfile->sections; |
30510692 DJ |
839 | |
840 | exec_set_section_address (bfd_get_filename (objfile->obfd), idx, | |
f1f6aadf | 841 | obj_section_addr (s)); |
30510692 | 842 | } |
b260e109 | 843 | |
55aa24fb SDJ |
844 | /* Relocating probes. */ |
845 | if (objfile->sf && objfile->sf->sym_probe_fns) | |
846 | objfile->sf->sym_probe_fns->sym_relocate_probe (objfile, | |
847 | new_offsets, delta); | |
848 | ||
b260e109 JK |
849 | /* Data changed. */ |
850 | return 1; | |
567995e1 JK |
851 | } |
852 | ||
853 | /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS | |
854 | entries in new_offsets. Process also OBJFILE's SEPARATE_DEBUG_OBJFILEs. | |
855 | ||
856 | The number and ordering of sections does differ between the two objfiles. | |
857 | Only their names match. Also the file offsets will differ (objfile being | |
858 | possibly prelinked but separate_debug_objfile is probably not prelinked) but | |
859 | the in-memory absolute address as specified by NEW_OFFSETS must match both | |
860 | files. */ | |
861 | ||
862 | void | |
3189cb12 DE |
863 | objfile_relocate (struct objfile *objfile, |
864 | const struct section_offsets *new_offsets) | |
567995e1 JK |
865 | { |
866 | struct objfile *debug_objfile; | |
b260e109 | 867 | int changed = 0; |
567995e1 | 868 | |
b260e109 | 869 | changed |= objfile_relocate1 (objfile, new_offsets); |
567995e1 JK |
870 | |
871 | for (debug_objfile = objfile->separate_debug_objfile; | |
872 | debug_objfile; | |
873 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
874 | { | |
875 | struct section_addr_info *objfile_addrs; | |
876 | struct section_offsets *new_debug_offsets; | |
567995e1 JK |
877 | struct cleanup *my_cleanups; |
878 | ||
879 | objfile_addrs = build_section_addr_info_from_objfile (objfile); | |
880 | my_cleanups = make_cleanup (xfree, objfile_addrs); | |
881 | ||
882 | /* Here OBJFILE_ADDRS contain the correct absolute addresses, the | |
883 | relative ones must be already created according to debug_objfile. */ | |
884 | ||
885 | addr_info_make_relative (objfile_addrs, debug_objfile->obfd); | |
886 | ||
887 | gdb_assert (debug_objfile->num_sections | |
d445b2f6 | 888 | == gdb_bfd_count_sections (debug_objfile->obfd)); |
4fc06681 MS |
889 | new_debug_offsets = |
890 | xmalloc (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections)); | |
567995e1 JK |
891 | make_cleanup (xfree, new_debug_offsets); |
892 | relative_addr_info_to_section_offsets (new_debug_offsets, | |
893 | debug_objfile->num_sections, | |
894 | objfile_addrs); | |
895 | ||
b260e109 | 896 | changed |= objfile_relocate1 (debug_objfile, new_debug_offsets); |
567995e1 JK |
897 | |
898 | do_cleanups (my_cleanups); | |
899 | } | |
30510692 | 900 | |
0df8b418 | 901 | /* Relocate breakpoints as necessary, after things are relocated. */ |
b260e109 JK |
902 | if (changed) |
903 | breakpoint_re_set (); | |
c906108c | 904 | } |
4141a416 JB |
905 | |
906 | /* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is | |
907 | not touched here. | |
908 | Return non-zero iff any change happened. */ | |
909 | ||
910 | static int | |
911 | objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide) | |
912 | { | |
913 | struct section_offsets *new_offsets = | |
914 | ((struct section_offsets *) | |
915 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); | |
916 | int i; | |
917 | ||
918 | for (i = 0; i < objfile->num_sections; ++i) | |
919 | new_offsets->offsets[i] = slide; | |
920 | ||
921 | return objfile_relocate1 (objfile, new_offsets); | |
922 | } | |
923 | ||
924 | /* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's | |
925 | SEPARATE_DEBUG_OBJFILEs. */ | |
926 | ||
927 | void | |
928 | objfile_rebase (struct objfile *objfile, CORE_ADDR slide) | |
929 | { | |
930 | struct objfile *debug_objfile; | |
931 | int changed = 0; | |
932 | ||
933 | changed |= objfile_rebase1 (objfile, slide); | |
934 | ||
935 | for (debug_objfile = objfile->separate_debug_objfile; | |
936 | debug_objfile; | |
937 | debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile)) | |
938 | changed |= objfile_rebase1 (debug_objfile, slide); | |
939 | ||
940 | /* Relocate breakpoints as necessary, after things are relocated. */ | |
941 | if (changed) | |
942 | breakpoint_re_set (); | |
943 | } | |
c906108c | 944 | \f |
55333a84 DE |
945 | /* Return non-zero if OBJFILE has partial symbols. */ |
946 | ||
947 | int | |
948 | objfile_has_partial_symbols (struct objfile *objfile) | |
949 | { | |
b11896a5 TT |
950 | if (!objfile->sf) |
951 | return 0; | |
3e03848b JK |
952 | |
953 | /* If we have not read psymbols, but we have a function capable of reading | |
954 | them, then that is an indication that they are in fact available. Without | |
955 | this function the symbols may have been already read in but they also may | |
956 | not be present in this objfile. */ | |
957 | if ((objfile->flags & OBJF_PSYMTABS_READ) == 0 | |
958 | && objfile->sf->sym_read_psymbols != NULL) | |
959 | return 1; | |
960 | ||
b11896a5 | 961 | return objfile->sf->qf->has_symbols (objfile); |
55333a84 DE |
962 | } |
963 | ||
964 | /* Return non-zero if OBJFILE has full symbols. */ | |
965 | ||
966 | int | |
967 | objfile_has_full_symbols (struct objfile *objfile) | |
968 | { | |
969 | return objfile->symtabs != NULL; | |
970 | } | |
971 | ||
e361b228 | 972 | /* Return non-zero if OBJFILE has full or partial symbols, either directly |
15d123c9 | 973 | or through a separate debug file. */ |
e361b228 TG |
974 | |
975 | int | |
976 | objfile_has_symbols (struct objfile *objfile) | |
977 | { | |
15d123c9 | 978 | struct objfile *o; |
e361b228 | 979 | |
15d123c9 TG |
980 | for (o = objfile; o; o = objfile_separate_debug_iterate (objfile, o)) |
981 | if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o)) | |
982 | return 1; | |
e361b228 TG |
983 | return 0; |
984 | } | |
985 | ||
986 | ||
c906108c SS |
987 | /* Many places in gdb want to test just to see if we have any partial |
988 | symbols available. This function returns zero if none are currently | |
0df8b418 | 989 | available, nonzero otherwise. */ |
c906108c SS |
990 | |
991 | int | |
fba45db2 | 992 | have_partial_symbols (void) |
c906108c SS |
993 | { |
994 | struct objfile *ofp; | |
995 | ||
996 | ALL_OBJFILES (ofp) | |
c5aa993b | 997 | { |
55333a84 DE |
998 | if (objfile_has_partial_symbols (ofp)) |
999 | return 1; | |
c5aa993b | 1000 | } |
c906108c SS |
1001 | return 0; |
1002 | } | |
1003 | ||
1004 | /* Many places in gdb want to test just to see if we have any full | |
1005 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1006 | available, nonzero otherwise. */ |
c906108c SS |
1007 | |
1008 | int | |
fba45db2 | 1009 | have_full_symbols (void) |
c906108c SS |
1010 | { |
1011 | struct objfile *ofp; | |
1012 | ||
1013 | ALL_OBJFILES (ofp) | |
c5aa993b | 1014 | { |
55333a84 DE |
1015 | if (objfile_has_full_symbols (ofp)) |
1016 | return 1; | |
c5aa993b | 1017 | } |
c906108c SS |
1018 | return 0; |
1019 | } | |
1020 | ||
1021 | ||
1022 | /* This operations deletes all objfile entries that represent solibs that | |
1023 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
1024 | command. */ |
1025 | ||
c906108c | 1026 | void |
fba45db2 | 1027 | objfile_purge_solibs (void) |
c906108c | 1028 | { |
c5aa993b JM |
1029 | struct objfile *objf; |
1030 | struct objfile *temp; | |
c906108c SS |
1031 | |
1032 | ALL_OBJFILES_SAFE (objf, temp) | |
1033 | { | |
1034 | /* We assume that the solib package has been purged already, or will | |
0df8b418 MS |
1035 | be soon. */ |
1036 | ||
2df3850c | 1037 | if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
c906108c SS |
1038 | free_objfile (objf); |
1039 | } | |
1040 | } | |
1041 | ||
1042 | ||
1043 | /* Many places in gdb want to test just to see if we have any minimal | |
1044 | symbols available. This function returns zero if none are currently | |
0df8b418 | 1045 | available, nonzero otherwise. */ |
c906108c SS |
1046 | |
1047 | int | |
fba45db2 | 1048 | have_minimal_symbols (void) |
c906108c SS |
1049 | { |
1050 | struct objfile *ofp; | |
1051 | ||
1052 | ALL_OBJFILES (ofp) | |
c5aa993b | 1053 | { |
15831452 | 1054 | if (ofp->minimal_symbol_count > 0) |
c5aa993b JM |
1055 | { |
1056 | return 1; | |
1057 | } | |
1058 | } | |
c906108c SS |
1059 | return 0; |
1060 | } | |
1061 | ||
a845f5cb PP |
1062 | /* Qsort comparison function. */ |
1063 | ||
1064 | static int | |
1065 | qsort_cmp (const void *a, const void *b) | |
1066 | { | |
1067 | const struct obj_section *sect1 = *(const struct obj_section **) a; | |
1068 | const struct obj_section *sect2 = *(const struct obj_section **) b; | |
1069 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1070 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1071 | ||
1072 | if (sect1_addr < sect2_addr) | |
6fbf07cd | 1073 | return -1; |
a845f5cb | 1074 | else if (sect1_addr > sect2_addr) |
6fbf07cd PP |
1075 | return 1; |
1076 | else | |
5cc80db3 MS |
1077 | { |
1078 | /* Sections are at the same address. This could happen if | |
1079 | A) we have an objfile and a separate debuginfo. | |
1080 | B) we are confused, and have added sections without proper relocation, | |
0df8b418 | 1081 | or something like that. */ |
5cc80db3 MS |
1082 | |
1083 | const struct objfile *const objfile1 = sect1->objfile; | |
1084 | const struct objfile *const objfile2 = sect2->objfile; | |
1085 | ||
1086 | if (objfile1->separate_debug_objfile == objfile2 | |
1087 | || objfile2->separate_debug_objfile == objfile1) | |
1088 | { | |
1089 | /* Case A. The ordering doesn't matter: separate debuginfo files | |
1090 | will be filtered out later. */ | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | /* Case B. Maintain stable sort order, so bugs in GDB are easier to | |
1096 | triage. This section could be slow (since we iterate over all | |
1097 | objfiles in each call to qsort_cmp), but this shouldn't happen | |
1098 | very often (GDB is already in a confused state; one hopes this | |
1099 | doesn't happen at all). If you discover that significant time is | |
1100 | spent in the loops below, do 'set complaints 100' and examine the | |
1101 | resulting complaints. */ | |
1102 | ||
1103 | if (objfile1 == objfile2) | |
1104 | { | |
1105 | /* Both sections came from the same objfile. We are really confused. | |
1106 | Sort on sequence order of sections within the objfile. */ | |
1107 | ||
1108 | const struct obj_section *osect; | |
1109 | ||
1110 | ALL_OBJFILE_OSECTIONS (objfile1, osect) | |
1111 | if (osect == sect1) | |
1112 | return -1; | |
1113 | else if (osect == sect2) | |
1114 | return 1; | |
1115 | ||
1116 | /* We should have found one of the sections before getting here. */ | |
f3574227 | 1117 | gdb_assert_not_reached ("section not found"); |
5cc80db3 MS |
1118 | } |
1119 | else | |
1120 | { | |
1121 | /* Sort on sequence number of the objfile in the chain. */ | |
1122 | ||
1123 | const struct objfile *objfile; | |
1124 | ||
1125 | ALL_OBJFILES (objfile) | |
1126 | if (objfile == objfile1) | |
1127 | return -1; | |
1128 | else if (objfile == objfile2) | |
1129 | return 1; | |
1130 | ||
1131 | /* We should have found one of the objfiles before getting here. */ | |
f3574227 | 1132 | gdb_assert_not_reached ("objfile not found"); |
5cc80db3 MS |
1133 | } |
1134 | } | |
6fbf07cd PP |
1135 | |
1136 | /* Unreachable. */ | |
f3574227 | 1137 | gdb_assert_not_reached ("unexpected code path"); |
a845f5cb PP |
1138 | return 0; |
1139 | } | |
1140 | ||
3aad21cf PP |
1141 | /* Select "better" obj_section to keep. We prefer the one that came from |
1142 | the real object, rather than the one from separate debuginfo. | |
1143 | Most of the time the two sections are exactly identical, but with | |
1144 | prelinking the .rel.dyn section in the real object may have different | |
1145 | size. */ | |
1146 | ||
1147 | static struct obj_section * | |
1148 | preferred_obj_section (struct obj_section *a, struct obj_section *b) | |
1149 | { | |
1150 | gdb_assert (obj_section_addr (a) == obj_section_addr (b)); | |
1151 | gdb_assert ((a->objfile->separate_debug_objfile == b->objfile) | |
1152 | || (b->objfile->separate_debug_objfile == a->objfile)); | |
1153 | gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile) | |
1154 | || (b->objfile->separate_debug_objfile_backlink == a->objfile)); | |
1155 | ||
1156 | if (a->objfile->separate_debug_objfile != NULL) | |
1157 | return a; | |
1158 | return b; | |
1159 | } | |
1160 | ||
6fbf07cd PP |
1161 | /* Return 1 if SECTION should be inserted into the section map. |
1162 | We want to insert only non-overlay and non-TLS section. */ | |
1163 | ||
1164 | static int | |
1165 | insert_section_p (const struct bfd *abfd, | |
1166 | const struct bfd_section *section) | |
1167 | { | |
1168 | const bfd_vma lma = bfd_section_lma (abfd, section); | |
1169 | ||
50f8ea94 | 1170 | if (overlay_debugging && lma != 0 && lma != bfd_section_vma (abfd, section) |
6fbf07cd PP |
1171 | && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0) |
1172 | /* This is an overlay section. IN_MEMORY check is needed to avoid | |
1173 | discarding sections from the "system supplied DSO" (aka vdso) | |
1174 | on some Linux systems (e.g. Fedora 11). */ | |
1175 | return 0; | |
1176 | if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0) | |
1177 | /* This is a TLS section. */ | |
1178 | return 0; | |
1179 | ||
1180 | return 1; | |
1181 | } | |
1182 | ||
1183 | /* Filter out overlapping sections where one section came from the real | |
1184 | objfile, and the other from a separate debuginfo file. | |
1185 | Return the size of table after redundant sections have been eliminated. */ | |
1186 | ||
1187 | static int | |
1188 | filter_debuginfo_sections (struct obj_section **map, int map_size) | |
1189 | { | |
1190 | int i, j; | |
1191 | ||
1192 | for (i = 0, j = 0; i < map_size - 1; i++) | |
1193 | { | |
1194 | struct obj_section *const sect1 = map[i]; | |
1195 | struct obj_section *const sect2 = map[i + 1]; | |
1196 | const struct objfile *const objfile1 = sect1->objfile; | |
1197 | const struct objfile *const objfile2 = sect2->objfile; | |
1198 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1199 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1200 | ||
1201 | if (sect1_addr == sect2_addr | |
1202 | && (objfile1->separate_debug_objfile == objfile2 | |
1203 | || objfile2->separate_debug_objfile == objfile1)) | |
1204 | { | |
1205 | map[j++] = preferred_obj_section (sect1, sect2); | |
1206 | ++i; | |
1207 | } | |
1208 | else | |
1209 | map[j++] = sect1; | |
1210 | } | |
1211 | ||
1212 | if (i < map_size) | |
1213 | { | |
1214 | gdb_assert (i == map_size - 1); | |
1215 | map[j++] = map[i]; | |
1216 | } | |
1217 | ||
1218 | /* The map should not have shrunk to less than half the original size. */ | |
1219 | gdb_assert (map_size / 2 <= j); | |
1220 | ||
1221 | return j; | |
1222 | } | |
1223 | ||
1224 | /* Filter out overlapping sections, issuing a warning if any are found. | |
1225 | Overlapping sections could really be overlay sections which we didn't | |
1226 | classify as such in insert_section_p, or we could be dealing with a | |
1227 | corrupt binary. */ | |
1228 | ||
1229 | static int | |
1230 | filter_overlapping_sections (struct obj_section **map, int map_size) | |
1231 | { | |
1232 | int i, j; | |
1233 | ||
1234 | for (i = 0, j = 0; i < map_size - 1; ) | |
1235 | { | |
1236 | int k; | |
1237 | ||
1238 | map[j++] = map[i]; | |
1239 | for (k = i + 1; k < map_size; k++) | |
1240 | { | |
1241 | struct obj_section *const sect1 = map[i]; | |
1242 | struct obj_section *const sect2 = map[k]; | |
1243 | const CORE_ADDR sect1_addr = obj_section_addr (sect1); | |
1244 | const CORE_ADDR sect2_addr = obj_section_addr (sect2); | |
1245 | const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1); | |
1246 | ||
1247 | gdb_assert (sect1_addr <= sect2_addr); | |
1248 | ||
1249 | if (sect1_endaddr <= sect2_addr) | |
1250 | break; | |
1251 | else | |
1252 | { | |
1253 | /* We have an overlap. Report it. */ | |
1254 | ||
1255 | struct objfile *const objf1 = sect1->objfile; | |
1256 | struct objfile *const objf2 = sect2->objfile; | |
1257 | ||
6fbf07cd PP |
1258 | const struct bfd_section *const bfds1 = sect1->the_bfd_section; |
1259 | const struct bfd_section *const bfds2 = sect2->the_bfd_section; | |
1260 | ||
1261 | const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2); | |
1262 | ||
1263 | struct gdbarch *const gdbarch = get_objfile_arch (objf1); | |
1264 | ||
1265 | complaint (&symfile_complaints, | |
1266 | _("unexpected overlap between:\n" | |
1267 | " (A) section `%s' from `%s' [%s, %s)\n" | |
1268 | " (B) section `%s' from `%s' [%s, %s).\n" | |
1269 | "Will ignore section B"), | |
1270 | bfd_section_name (abfd1, bfds1), objf1->name, | |
1271 | paddress (gdbarch, sect1_addr), | |
1272 | paddress (gdbarch, sect1_endaddr), | |
1273 | bfd_section_name (abfd2, bfds2), objf2->name, | |
1274 | paddress (gdbarch, sect2_addr), | |
1275 | paddress (gdbarch, sect2_endaddr)); | |
1276 | } | |
1277 | } | |
1278 | i = k; | |
1279 | } | |
1280 | ||
1281 | if (i < map_size) | |
1282 | { | |
1283 | gdb_assert (i == map_size - 1); | |
1284 | map[j++] = map[i]; | |
1285 | } | |
1286 | ||
1287 | return j; | |
1288 | } | |
1289 | ||
1290 | ||
1291 | /* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any | |
1292 | TLS, overlay and overlapping sections. */ | |
a845f5cb PP |
1293 | |
1294 | static void | |
6c95b8df PA |
1295 | update_section_map (struct program_space *pspace, |
1296 | struct obj_section ***pmap, int *pmap_size) | |
a845f5cb | 1297 | { |
607ece04 | 1298 | struct objfile_pspace_info *pspace_info; |
6fbf07cd | 1299 | int alloc_size, map_size, i; |
a845f5cb PP |
1300 | struct obj_section *s, **map; |
1301 | struct objfile *objfile; | |
1302 | ||
607ece04 GB |
1303 | pspace_info = get_objfile_pspace_data (pspace); |
1304 | gdb_assert (pspace_info->section_map_dirty != 0 | |
1305 | || pspace_info->new_objfiles_available != 0); | |
a845f5cb PP |
1306 | |
1307 | map = *pmap; | |
1308 | xfree (map); | |
1309 | ||
6fbf07cd | 1310 | alloc_size = 0; |
6c95b8df PA |
1311 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1312 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1313 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1314 | alloc_size += 1; | |
a845f5cb | 1315 | |
65a97ab3 PP |
1316 | /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */ |
1317 | if (alloc_size == 0) | |
1318 | { | |
1319 | *pmap = NULL; | |
1320 | *pmap_size = 0; | |
1321 | return; | |
1322 | } | |
1323 | ||
6fbf07cd | 1324 | map = xmalloc (alloc_size * sizeof (*map)); |
a845f5cb | 1325 | |
3aad21cf | 1326 | i = 0; |
6c95b8df PA |
1327 | ALL_PSPACE_OBJFILES (pspace, objfile) |
1328 | ALL_OBJFILE_OSECTIONS (objfile, s) | |
1329 | if (insert_section_p (objfile->obfd, s->the_bfd_section)) | |
1330 | map[i++] = s; | |
a845f5cb | 1331 | |
6fbf07cd PP |
1332 | qsort (map, alloc_size, sizeof (*map), qsort_cmp); |
1333 | map_size = filter_debuginfo_sections(map, alloc_size); | |
1334 | map_size = filter_overlapping_sections(map, map_size); | |
a845f5cb | 1335 | |
6fbf07cd PP |
1336 | if (map_size < alloc_size) |
1337 | /* Some sections were eliminated. Trim excess space. */ | |
1338 | map = xrealloc (map, map_size * sizeof (*map)); | |
3aad21cf | 1339 | else |
6fbf07cd | 1340 | gdb_assert (alloc_size == map_size); |
3aad21cf | 1341 | |
a845f5cb PP |
1342 | *pmap = map; |
1343 | *pmap_size = map_size; | |
1344 | } | |
1345 | ||
0df8b418 | 1346 | /* Bsearch comparison function. */ |
a845f5cb PP |
1347 | |
1348 | static int | |
1349 | bsearch_cmp (const void *key, const void *elt) | |
1350 | { | |
1351 | const CORE_ADDR pc = *(CORE_ADDR *) key; | |
1352 | const struct obj_section *section = *(const struct obj_section **) elt; | |
1353 | ||
1354 | if (pc < obj_section_addr (section)) | |
1355 | return -1; | |
1356 | if (pc < obj_section_endaddr (section)) | |
1357 | return 0; | |
1358 | return 1; | |
1359 | } | |
1360 | ||
714835d5 | 1361 | /* Returns a section whose range includes PC or NULL if none found. */ |
c906108c SS |
1362 | |
1363 | struct obj_section * | |
714835d5 | 1364 | find_pc_section (CORE_ADDR pc) |
c906108c | 1365 | { |
6c95b8df | 1366 | struct objfile_pspace_info *pspace_info; |
a845f5cb | 1367 | struct obj_section *s, **sp; |
c5aa993b | 1368 | |
714835d5 UW |
1369 | /* Check for mapped overlay section first. */ |
1370 | s = find_pc_mapped_section (pc); | |
1371 | if (s) | |
1372 | return s; | |
c906108c | 1373 | |
6c95b8df | 1374 | pspace_info = get_objfile_pspace_data (current_program_space); |
607ece04 GB |
1375 | if (pspace_info->section_map_dirty |
1376 | || (pspace_info->new_objfiles_available | |
1377 | && !pspace_info->inhibit_updates)) | |
a845f5cb | 1378 | { |
6c95b8df PA |
1379 | update_section_map (current_program_space, |
1380 | &pspace_info->sections, | |
1381 | &pspace_info->num_sections); | |
c906108c | 1382 | |
6c95b8df PA |
1383 | /* Don't need updates to section map until objfiles are added, |
1384 | removed or relocated. */ | |
607ece04 GB |
1385 | pspace_info->new_objfiles_available = 0; |
1386 | pspace_info->section_map_dirty = 0; | |
a845f5cb PP |
1387 | } |
1388 | ||
65a97ab3 PP |
1389 | /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to |
1390 | bsearch be non-NULL. */ | |
1391 | if (pspace_info->sections == NULL) | |
1392 | { | |
1393 | gdb_assert (pspace_info->num_sections == 0); | |
1394 | return NULL; | |
1395 | } | |
1396 | ||
6c95b8df PA |
1397 | sp = (struct obj_section **) bsearch (&pc, |
1398 | pspace_info->sections, | |
1399 | pspace_info->num_sections, | |
1400 | sizeof (*pspace_info->sections), | |
1401 | bsearch_cmp); | |
a845f5cb PP |
1402 | if (sp != NULL) |
1403 | return *sp; | |
714835d5 | 1404 | return NULL; |
c906108c | 1405 | } |
c5aa993b | 1406 | |
c906108c | 1407 | |
3e5d3a5a | 1408 | /* Return non-zero if PC is in a section called NAME. */ |
c906108c SS |
1409 | |
1410 | int | |
3e5d3a5a | 1411 | pc_in_section (CORE_ADDR pc, char *name) |
c906108c SS |
1412 | { |
1413 | struct obj_section *s; | |
1414 | int retval = 0; | |
c5aa993b JM |
1415 | |
1416 | s = find_pc_section (pc); | |
1417 | ||
c906108c SS |
1418 | retval = (s != NULL |
1419 | && s->the_bfd_section->name != NULL | |
3e5d3a5a | 1420 | && strcmp (s->the_bfd_section->name, name) == 0); |
c5aa993b | 1421 | return (retval); |
c906108c | 1422 | } |
0d0e1a63 MK |
1423 | \f |
1424 | ||
607ece04 | 1425 | /* Set section_map_dirty so section map will be rebuilt next time it |
bb272892 | 1426 | is used. Called by reread_symbols. */ |
a845f5cb PP |
1427 | |
1428 | void | |
bb272892 | 1429 | objfiles_changed (void) |
a845f5cb | 1430 | { |
6c95b8df | 1431 | /* Rebuild section map next time we need it. */ |
607ece04 GB |
1432 | get_objfile_pspace_data (current_program_space)->section_map_dirty = 1; |
1433 | } | |
1434 | ||
1435 | /* See comments in objfiles.h. */ | |
1436 | ||
1437 | void | |
1438 | inhibit_section_map_updates (struct program_space *pspace) | |
1439 | { | |
1440 | get_objfile_pspace_data (pspace)->inhibit_updates = 1; | |
1441 | } | |
1442 | ||
1443 | /* See comments in objfiles.h. */ | |
1444 | ||
1445 | void | |
1446 | resume_section_map_updates (struct program_space *pspace) | |
1447 | { | |
1448 | get_objfile_pspace_data (pspace)->inhibit_updates = 0; | |
1449 | } | |
1450 | ||
1451 | /* See comments in objfiles.h. */ | |
1452 | ||
1453 | void | |
1454 | resume_section_map_updates_cleanup (void *arg) | |
1455 | { | |
1456 | resume_section_map_updates (arg); | |
a845f5cb | 1457 | } |
e3c69974 | 1458 | |
19630284 JB |
1459 | /* The default implementation for the "iterate_over_objfiles_in_search_order" |
1460 | gdbarch method. It is equivalent to use the ALL_OBJFILES macro, | |
1461 | searching the objfiles in the order they are stored internally, | |
1462 | ignoring CURRENT_OBJFILE. | |
1463 | ||
1464 | On most platorms, it should be close enough to doing the best | |
1465 | we can without some knowledge specific to the architecture. */ | |
1466 | ||
1467 | void | |
1468 | default_iterate_over_objfiles_in_search_order | |
1469 | (struct gdbarch *gdbarch, | |
1470 | iterate_over_objfiles_in_search_order_cb_ftype *cb, | |
1471 | void *cb_data, struct objfile *current_objfile) | |
1472 | { | |
1473 | int stop = 0; | |
1474 | struct objfile *objfile; | |
1475 | ||
1476 | ALL_OBJFILES (objfile) | |
1477 | { | |
1478 | stop = cb (objfile, cb_data); | |
1479 | if (stop) | |
1480 | return; | |
1481 | } | |
1482 | } | |
1483 | ||
6c95b8df PA |
1484 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1485 | extern initialize_file_ftype _initialize_objfiles; | |
1486 | ||
1487 | void | |
1488 | _initialize_objfiles (void) | |
1489 | { | |
1490 | objfiles_pspace_data | |
8e260fc0 TT |
1491 | = register_program_space_data_with_cleanup (NULL, |
1492 | objfiles_pspace_data_cleanup); | |
706e3705 TT |
1493 | |
1494 | objfiles_bfd_data = register_bfd_data_with_cleanup (NULL, | |
1495 | objfile_bfd_data_free); | |
6c95b8df | 1496 | } |