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Commit | Line | Data |
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cbb099e8 TT |
1 | /* Definitions for BFD wrappers used by GDB. |
2 | ||
4a94e368 | 3 | Copyright (C) 2011-2022 Free Software Foundation, Inc. |
cbb099e8 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdb_bfd.h" | |
d6b28940 TT |
22 | #include "ui-out.h" |
23 | #include "gdbcmd.h" | |
6ec53d05 | 24 | #include "hashtab.h" |
268a13a5 | 25 | #include "gdbsupport/filestuff.h" |
4bf44c1c TT |
26 | #ifdef HAVE_MMAP |
27 | #include <sys/mman.h> | |
28 | #ifndef MAP_FAILED | |
29 | #define MAP_FAILED ((void *) -1) | |
30 | #endif | |
31 | #endif | |
f08e97fe | 32 | #include "target.h" |
198f946f | 33 | #include "gdbsupport/fileio.h" |
07c138c8 | 34 | #include "inferior.h" |
972f7a4b | 35 | #include "cli/cli-style.h" |
84e60555 | 36 | #include <unordered_map> |
4bf44c1c TT |
37 | |
38 | /* An object of this type is stored in the section's user data when | |
39 | mapping a section. */ | |
40 | ||
41 | struct gdb_bfd_section_data | |
42 | { | |
43 | /* Size of the data. */ | |
44 | bfd_size_type size; | |
45 | /* If the data was mmapped, this is the length of the map. */ | |
46 | bfd_size_type map_len; | |
47 | /* The data. If NULL, the section data has not been read. */ | |
48 | void *data; | |
49 | /* If the data was mmapped, this is the map address. */ | |
50 | void *map_addr; | |
51 | }; | |
a4453b7e | 52 | |
d6b28940 TT |
53 | /* A hash table holding every BFD that gdb knows about. This is not |
54 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
55 | BFDs; in contrast, this hash is used just to implement | |
56 | "maint info bfd". */ | |
57 | ||
58 | static htab_t all_bfds; | |
59 | ||
6ec53d05 TT |
60 | /* An object of this type is stored in each BFD's user data. */ |
61 | ||
62 | struct gdb_bfd_data | |
63 | { | |
3cae4447 TT |
64 | /* Note that if ST is nullptr, then we simply fill in zeroes. */ |
65 | gdb_bfd_data (bfd *abfd, struct stat *st) | |
66 | : mtime (st == nullptr ? 0 : st->st_mtime), | |
67 | size (st == nullptr ? 0 : st->st_size), | |
68 | inode (st == nullptr ? 0 : st->st_ino), | |
69 | device_id (st == nullptr ? 0 : st->st_dev), | |
06d5bbc8 TT |
70 | relocation_computed (0), |
71 | needs_relocations (0), | |
72 | crc_computed (0) | |
73 | { | |
06d5bbc8 TT |
74 | } |
75 | ||
76 | ~gdb_bfd_data () | |
77 | { | |
06d5bbc8 TT |
78 | } |
79 | ||
6ec53d05 | 80 | /* The reference count. */ |
06d5bbc8 | 81 | int refc = 1; |
6ec53d05 TT |
82 | |
83 | /* The mtime of the BFD at the point the cache entry was made. */ | |
84 | time_t mtime; | |
b82d08cd | 85 | |
c04fe68f AB |
86 | /* The file size (in bytes) at the point the cache entry was made. */ |
87 | off_t size; | |
88 | ||
89 | /* The inode of the file at the point the cache entry was made. */ | |
90 | ino_t inode; | |
91 | ||
92 | /* The device id of the file at the point the cache entry was made. */ | |
93 | dev_t device_id; | |
94 | ||
1da77581 TT |
95 | /* This is true if we have determined whether this BFD has any |
96 | sections requiring relocation. */ | |
97 | unsigned int relocation_computed : 1; | |
98 | ||
99 | /* This is true if any section needs relocation. */ | |
100 | unsigned int needs_relocations : 1; | |
101 | ||
dccee2de TT |
102 | /* This is true if we have successfully computed the file's CRC. */ |
103 | unsigned int crc_computed : 1; | |
104 | ||
105 | /* The file's CRC. */ | |
06d5bbc8 | 106 | unsigned long crc = 0; |
dccee2de | 107 | |
b82d08cd TT |
108 | /* If the BFD comes from an archive, this points to the archive's |
109 | BFD. Otherwise, this is NULL. */ | |
06d5bbc8 | 110 | bfd *archive_bfd = nullptr; |
e992eda4 | 111 | |
13aaf454 | 112 | /* Table of all the bfds this bfd has included. */ |
d5833c62 | 113 | std::vector<gdb_bfd_ref_ptr> included_bfds; |
13aaf454 | 114 | |
e992eda4 | 115 | /* The registry. */ |
08b8a139 | 116 | registry<bfd> registry_fields; |
6ec53d05 TT |
117 | }; |
118 | ||
08b8a139 TT |
119 | registry<bfd> * |
120 | registry_accessor<bfd>::get (bfd *abfd) | |
121 | { | |
122 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
123 | return &gdata->registry_fields; | |
124 | } | |
e992eda4 | 125 | |
6ec53d05 TT |
126 | /* A hash table storing all the BFDs maintained in the cache. */ |
127 | ||
128 | static htab_t gdb_bfd_cache; | |
129 | ||
18989b3c AB |
130 | /* When true gdb will reuse an existing bfd object if the filename, |
131 | modification time, and file size all match. */ | |
132 | ||
491144b5 | 133 | static bool bfd_sharing = true; |
18989b3c AB |
134 | static void |
135 | show_bfd_sharing (struct ui_file *file, int from_tty, | |
136 | struct cmd_list_element *c, const char *value) | |
137 | { | |
6cb06a8c | 138 | gdb_printf (file, _("BFD sharing is %s.\n"), value); |
18989b3c AB |
139 | } |
140 | ||
d4dd4fca SM |
141 | /* When true debugging of the bfd caches is enabled. */ |
142 | ||
143 | static bool debug_bfd_cache; | |
566f5e3b | 144 | |
1e15fcac SM |
145 | /* Print an "bfd-cache" debug statement. */ |
146 | ||
147 | #define bfd_cache_debug_printf(fmt, ...) \ | |
148 | debug_prefixed_printf_cond (debug_bfd_cache, "bfd-cache", fmt, ##__VA_ARGS__) | |
149 | ||
566f5e3b AB |
150 | static void |
151 | show_bfd_cache_debug (struct ui_file *file, int from_tty, | |
152 | struct cmd_list_element *c, const char *value) | |
153 | { | |
6cb06a8c | 154 | gdb_printf (file, _("BFD cache debugging is %s.\n"), value); |
566f5e3b AB |
155 | } |
156 | ||
6ec53d05 TT |
157 | /* The type of an object being looked up in gdb_bfd_cache. We use |
158 | htab's capability of storing one kind of object (BFD in this case) | |
159 | and using a different sort of object for searching. */ | |
160 | ||
161 | struct gdb_bfd_cache_search | |
162 | { | |
163 | /* The filename. */ | |
164 | const char *filename; | |
165 | /* The mtime. */ | |
166 | time_t mtime; | |
c04fe68f AB |
167 | /* The file size (in bytes). */ |
168 | off_t size; | |
169 | /* The inode of the file. */ | |
170 | ino_t inode; | |
171 | /* The device id of the file. */ | |
172 | dev_t device_id; | |
6ec53d05 TT |
173 | }; |
174 | ||
175 | /* A hash function for BFDs. */ | |
176 | ||
177 | static hashval_t | |
178 | hash_bfd (const void *b) | |
179 | { | |
9a3c8263 | 180 | const bfd *abfd = (const struct bfd *) b; |
6ec53d05 TT |
181 | |
182 | /* It is simplest to just hash the filename. */ | |
183 | return htab_hash_string (bfd_get_filename (abfd)); | |
184 | } | |
185 | ||
186 | /* An equality function for BFDs. Note that this expects the caller | |
187 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
188 | ||
189 | static int | |
190 | eq_bfd (const void *a, const void *b) | |
191 | { | |
9a3c8263 SM |
192 | const bfd *abfd = (const struct bfd *) a; |
193 | const struct gdb_bfd_cache_search *s | |
194 | = (const struct gdb_bfd_cache_search *) b; | |
195 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
6ec53d05 TT |
196 | |
197 | return (gdata->mtime == s->mtime | |
c04fe68f AB |
198 | && gdata->size == s->size |
199 | && gdata->inode == s->inode | |
200 | && gdata->device_id == s->device_id | |
6ec53d05 TT |
201 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); |
202 | } | |
203 | ||
204 | /* See gdb_bfd.h. */ | |
205 | ||
f08e97fe GB |
206 | int |
207 | is_target_filename (const char *name) | |
208 | { | |
209 | return startswith (name, TARGET_SYSROOT_PREFIX); | |
210 | } | |
211 | ||
212 | /* See gdb_bfd.h. */ | |
213 | ||
214 | int | |
215 | gdb_bfd_has_target_filename (struct bfd *abfd) | |
216 | { | |
217 | return is_target_filename (bfd_get_filename (abfd)); | |
218 | } | |
219 | ||
15cc148f MS |
220 | /* For `gdb_bfd_open_from_target_memory`. */ |
221 | ||
222 | struct target_buffer | |
223 | { | |
224 | CORE_ADDR base; | |
225 | ULONGEST size; | |
226 | }; | |
227 | ||
228 | /* For `gdb_bfd_open_from_target_memory`. Opening the file is a no-op. */ | |
229 | ||
230 | static void * | |
231 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
232 | { | |
233 | return open_closure; | |
234 | } | |
235 | ||
236 | /* For `gdb_bfd_open_from_target_memory`. Closing the file is just freeing the | |
237 | base/size pair on our side. */ | |
238 | ||
239 | static int | |
240 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
241 | { | |
242 | xfree (stream); | |
243 | ||
244 | /* Zero means success. */ | |
245 | return 0; | |
246 | } | |
247 | ||
248 | /* For `gdb_bfd_open_from_target_memory`. For reading the file, we just need to | |
249 | pass through to target_read_memory and fix up the arguments and return | |
250 | values. */ | |
251 | ||
252 | static file_ptr | |
253 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
254 | file_ptr nbytes, file_ptr offset) | |
255 | { | |
256 | int err; | |
257 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
258 | ||
259 | /* If this read will read all of the file, limit it to just the rest. */ | |
260 | if (offset + nbytes > buffer->size) | |
261 | nbytes = buffer->size - offset; | |
262 | ||
263 | /* If there are no more bytes left, we've reached EOF. */ | |
264 | if (nbytes == 0) | |
265 | return 0; | |
266 | ||
267 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
268 | if (err) | |
269 | return -1; | |
270 | ||
271 | return nbytes; | |
272 | } | |
273 | ||
274 | /* For `gdb_bfd_open_from_target_memory`. For statting the file, we only | |
275 | support the st_size attribute. */ | |
276 | ||
277 | static int | |
278 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
279 | { | |
280 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
281 | ||
282 | memset (sb, 0, sizeof (struct stat)); | |
283 | sb->st_size = buffer->size; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | /* See gdb_bfd.h. */ | |
288 | ||
289 | gdb_bfd_ref_ptr | |
290 | gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, | |
291 | const char *target, | |
292 | const char *filename) | |
293 | { | |
294 | struct target_buffer *buffer = XNEW (struct target_buffer); | |
295 | ||
296 | buffer->base = addr; | |
297 | buffer->size = size; | |
298 | return gdb_bfd_openr_iovec (filename ? filename : "<in-memory>", target, | |
299 | mem_bfd_iovec_open, | |
300 | buffer, | |
301 | mem_bfd_iovec_pread, | |
302 | mem_bfd_iovec_close, | |
303 | mem_bfd_iovec_stat); | |
304 | } | |
f08e97fe GB |
305 | |
306 | /* Return the system error number corresponding to ERRNUM. */ | |
307 | ||
308 | static int | |
b872057a | 309 | fileio_errno_to_host (fileio_error errnum) |
f08e97fe GB |
310 | { |
311 | switch (errnum) | |
312 | { | |
313 | case FILEIO_EPERM: | |
dda83cd7 | 314 | return EPERM; |
f08e97fe | 315 | case FILEIO_ENOENT: |
dda83cd7 | 316 | return ENOENT; |
f08e97fe | 317 | case FILEIO_EINTR: |
dda83cd7 | 318 | return EINTR; |
f08e97fe | 319 | case FILEIO_EIO: |
dda83cd7 | 320 | return EIO; |
f08e97fe | 321 | case FILEIO_EBADF: |
dda83cd7 | 322 | return EBADF; |
f08e97fe | 323 | case FILEIO_EACCES: |
dda83cd7 | 324 | return EACCES; |
f08e97fe | 325 | case FILEIO_EFAULT: |
dda83cd7 | 326 | return EFAULT; |
f08e97fe | 327 | case FILEIO_EBUSY: |
dda83cd7 | 328 | return EBUSY; |
f08e97fe | 329 | case FILEIO_EEXIST: |
dda83cd7 | 330 | return EEXIST; |
f08e97fe | 331 | case FILEIO_ENODEV: |
dda83cd7 | 332 | return ENODEV; |
f08e97fe | 333 | case FILEIO_ENOTDIR: |
dda83cd7 | 334 | return ENOTDIR; |
f08e97fe | 335 | case FILEIO_EISDIR: |
dda83cd7 | 336 | return EISDIR; |
f08e97fe | 337 | case FILEIO_EINVAL: |
dda83cd7 | 338 | return EINVAL; |
f08e97fe | 339 | case FILEIO_ENFILE: |
dda83cd7 | 340 | return ENFILE; |
f08e97fe | 341 | case FILEIO_EMFILE: |
dda83cd7 | 342 | return EMFILE; |
f08e97fe | 343 | case FILEIO_EFBIG: |
dda83cd7 | 344 | return EFBIG; |
f08e97fe | 345 | case FILEIO_ENOSPC: |
dda83cd7 | 346 | return ENOSPC; |
f08e97fe | 347 | case FILEIO_ESPIPE: |
dda83cd7 | 348 | return ESPIPE; |
f08e97fe | 349 | case FILEIO_EROFS: |
dda83cd7 | 350 | return EROFS; |
f08e97fe | 351 | case FILEIO_ENOSYS: |
dda83cd7 | 352 | return ENOSYS; |
f08e97fe | 353 | case FILEIO_ENAMETOOLONG: |
dda83cd7 | 354 | return ENAMETOOLONG; |
f08e97fe GB |
355 | } |
356 | return -1; | |
357 | } | |
358 | ||
98c59b52 PA |
359 | /* bfd_openr_iovec OPEN_CLOSURE data for gdb_bfd_open. */ |
360 | struct gdb_bfd_open_closure | |
361 | { | |
362 | inferior *inf; | |
363 | bool warn_if_slow; | |
364 | }; | |
365 | ||
f08e97fe | 366 | /* Wrapper for target_fileio_open suitable for passing as the |
98c59b52 | 367 | OPEN_FUNC argument to gdb_bfd_openr_iovec. */ |
f08e97fe GB |
368 | |
369 | static void * | |
98c59b52 | 370 | gdb_bfd_iovec_fileio_open (struct bfd *abfd, void *open_closure) |
f08e97fe GB |
371 | { |
372 | const char *filename = bfd_get_filename (abfd); | |
b872057a SM |
373 | int fd; |
374 | fileio_error target_errno; | |
f08e97fe | 375 | int *stream; |
98c59b52 | 376 | gdb_bfd_open_closure *oclosure = (gdb_bfd_open_closure *) open_closure; |
f08e97fe GB |
377 | |
378 | gdb_assert (is_target_filename (filename)); | |
379 | ||
98c59b52 | 380 | fd = target_fileio_open (oclosure->inf, |
4111f652 | 381 | filename + strlen (TARGET_SYSROOT_PREFIX), |
98c59b52 | 382 | FILEIO_O_RDONLY, 0, oclosure->warn_if_slow, |
4111f652 | 383 | &target_errno); |
f08e97fe GB |
384 | if (fd == -1) |
385 | { | |
386 | errno = fileio_errno_to_host (target_errno); | |
387 | bfd_set_error (bfd_error_system_call); | |
388 | return NULL; | |
389 | } | |
390 | ||
391 | stream = XCNEW (int); | |
392 | *stream = fd; | |
393 | return stream; | |
394 | } | |
395 | ||
396 | /* Wrapper for target_fileio_pread suitable for passing as the | |
397 | PREAD_FUNC argument to gdb_bfd_openr_iovec. */ | |
398 | ||
399 | static file_ptr | |
400 | gdb_bfd_iovec_fileio_pread (struct bfd *abfd, void *stream, void *buf, | |
401 | file_ptr nbytes, file_ptr offset) | |
402 | { | |
403 | int fd = *(int *) stream; | |
b872057a | 404 | fileio_error target_errno; |
f08e97fe GB |
405 | file_ptr pos, bytes; |
406 | ||
407 | pos = 0; | |
408 | while (nbytes > pos) | |
409 | { | |
2d7711a3 GB |
410 | QUIT; |
411 | ||
f08e97fe GB |
412 | bytes = target_fileio_pread (fd, (gdb_byte *) buf + pos, |
413 | nbytes - pos, offset + pos, | |
414 | &target_errno); | |
415 | if (bytes == 0) | |
dda83cd7 SM |
416 | /* Success, but no bytes, means end-of-file. */ |
417 | break; | |
f08e97fe GB |
418 | if (bytes == -1) |
419 | { | |
420 | errno = fileio_errno_to_host (target_errno); | |
421 | bfd_set_error (bfd_error_system_call); | |
422 | return -1; | |
423 | } | |
424 | ||
425 | pos += bytes; | |
426 | } | |
427 | ||
428 | return pos; | |
429 | } | |
430 | ||
3a76f8f4 PA |
431 | /* Warn that it wasn't possible to close a bfd for file NAME, because |
432 | of REASON. */ | |
433 | ||
434 | static void | |
435 | gdb_bfd_close_warning (const char *name, const char *reason) | |
436 | { | |
437 | warning (_("cannot close \"%s\": %s"), name, reason); | |
438 | } | |
439 | ||
f08e97fe GB |
440 | /* Wrapper for target_fileio_close suitable for passing as the |
441 | CLOSE_FUNC argument to gdb_bfd_openr_iovec. */ | |
442 | ||
443 | static int | |
444 | gdb_bfd_iovec_fileio_close (struct bfd *abfd, void *stream) | |
445 | { | |
446 | int fd = *(int *) stream; | |
b872057a | 447 | fileio_error target_errno; |
f08e97fe GB |
448 | |
449 | xfree (stream); | |
450 | ||
451 | /* Ignore errors on close. These may happen with remote | |
452 | targets if the connection has already been torn down. */ | |
3a76f8f4 PA |
453 | try |
454 | { | |
455 | target_fileio_close (fd, &target_errno); | |
456 | } | |
457 | catch (const gdb_exception &ex) | |
458 | { | |
459 | /* Also avoid crossing exceptions over bfd. */ | |
460 | gdb_bfd_close_warning (bfd_get_filename (abfd), | |
461 | ex.message->c_str ()); | |
462 | } | |
f08e97fe GB |
463 | |
464 | /* Zero means success. */ | |
465 | return 0; | |
466 | } | |
467 | ||
468 | /* Wrapper for target_fileio_fstat suitable for passing as the | |
469 | STAT_FUNC argument to gdb_bfd_openr_iovec. */ | |
470 | ||
471 | static int | |
472 | gdb_bfd_iovec_fileio_fstat (struct bfd *abfd, void *stream, | |
473 | struct stat *sb) | |
474 | { | |
475 | int fd = *(int *) stream; | |
b872057a | 476 | fileio_error target_errno; |
f08e97fe GB |
477 | int result; |
478 | ||
479 | result = target_fileio_fstat (fd, sb, &target_errno); | |
480 | if (result == -1) | |
481 | { | |
482 | errno = fileio_errno_to_host (target_errno); | |
483 | bfd_set_error (bfd_error_system_call); | |
484 | } | |
485 | ||
486 | return result; | |
487 | } | |
488 | ||
3cae4447 TT |
489 | /* A helper function to initialize the data that gdb attaches to each |
490 | BFD. */ | |
491 | ||
492 | static void | |
493 | gdb_bfd_init_data (struct bfd *abfd, struct stat *st) | |
494 | { | |
495 | struct gdb_bfd_data *gdata; | |
496 | void **slot; | |
497 | ||
498 | gdb_assert (bfd_usrdata (abfd) == nullptr); | |
499 | ||
500 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ | |
501 | abfd->flags |= BFD_DECOMPRESS; | |
502 | ||
503 | gdata = new gdb_bfd_data (abfd, st); | |
504 | bfd_set_usrdata (abfd, gdata); | |
3cae4447 TT |
505 | |
506 | /* This is the first we've seen it, so add it to the hash table. */ | |
507 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
508 | gdb_assert (slot && !*slot); | |
509 | *slot = abfd; | |
510 | } | |
511 | ||
f08e97fe GB |
512 | /* See gdb_bfd.h. */ |
513 | ||
192b62ce | 514 | gdb_bfd_ref_ptr |
98c59b52 PA |
515 | gdb_bfd_open (const char *name, const char *target, int fd, |
516 | bool warn_if_slow) | |
6ec53d05 TT |
517 | { |
518 | hashval_t hash; | |
519 | void **slot; | |
520 | bfd *abfd; | |
521 | struct gdb_bfd_cache_search search; | |
522 | struct stat st; | |
523 | ||
f08e97fe GB |
524 | if (is_target_filename (name)) |
525 | { | |
526 | if (!target_filesystem_is_local ()) | |
527 | { | |
528 | gdb_assert (fd == -1); | |
529 | ||
98c59b52 | 530 | gdb_bfd_open_closure open_closure { current_inferior (), warn_if_slow }; |
e3dd7556 | 531 | return gdb_bfd_openr_iovec (name, target, |
07c138c8 | 532 | gdb_bfd_iovec_fileio_open, |
98c59b52 | 533 | &open_closure, |
f08e97fe GB |
534 | gdb_bfd_iovec_fileio_pread, |
535 | gdb_bfd_iovec_fileio_close, | |
536 | gdb_bfd_iovec_fileio_fstat); | |
f08e97fe GB |
537 | } |
538 | ||
539 | name += strlen (TARGET_SYSROOT_PREFIX); | |
540 | } | |
541 | ||
6ec53d05 TT |
542 | if (gdb_bfd_cache == NULL) |
543 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
544 | xcalloc, xfree); | |
545 | ||
546 | if (fd == -1) | |
547 | { | |
13084383 | 548 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0).release (); |
6ec53d05 TT |
549 | if (fd == -1) |
550 | { | |
551 | bfd_set_error (bfd_error_system_call); | |
552 | return NULL; | |
553 | } | |
554 | } | |
555 | ||
6ec53d05 TT |
556 | if (fstat (fd, &st) < 0) |
557 | { | |
3cae4447 | 558 | /* Weird situation here -- don't cache if we can't stat. */ |
1e15fcac | 559 | bfd_cache_debug_printf ("Could not stat %s - not caching", name); |
03b0a45f TT |
560 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); |
561 | if (abfd == nullptr) | |
562 | return nullptr; | |
3cae4447 | 563 | return gdb_bfd_ref_ptr::new_reference (abfd); |
c04fe68f | 564 | } |
6ec53d05 | 565 | |
3cae4447 TT |
566 | search.filename = name; |
567 | search.mtime = st.st_mtime; | |
568 | search.size = st.st_size; | |
569 | search.inode = st.st_ino; | |
570 | search.device_id = st.st_dev; | |
571 | ||
6ec53d05 TT |
572 | /* Note that this must compute the same result as hash_bfd. */ |
573 | hash = htab_hash_string (name); | |
574 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
575 | opening the BFD may fail; and this would violate hashtab | |
576 | invariants. */ | |
9a3c8263 | 577 | abfd = (struct bfd *) htab_find_with_hash (gdb_bfd_cache, &search, hash); |
18989b3c | 578 | if (bfd_sharing && abfd != NULL) |
6ec53d05 | 579 | { |
1e15fcac SM |
580 | bfd_cache_debug_printf ("Reusing cached bfd %s for %s", |
581 | host_address_to_string (abfd), | |
582 | bfd_get_filename (abfd)); | |
6ec53d05 | 583 | close (fd); |
1831a9f9 | 584 | return gdb_bfd_ref_ptr::new_reference (abfd); |
6ec53d05 TT |
585 | } |
586 | ||
587 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
588 | if (abfd == NULL) | |
589 | return NULL; | |
590 | ||
1e15fcac SM |
591 | bfd_cache_debug_printf ("Creating new bfd %s for %s", |
592 | host_address_to_string (abfd), | |
593 | bfd_get_filename (abfd)); | |
566f5e3b | 594 | |
18989b3c AB |
595 | if (bfd_sharing) |
596 | { | |
597 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
598 | gdb_assert (!*slot); | |
599 | *slot = abfd; | |
600 | } | |
6ec53d05 | 601 | |
3cae4447 TT |
602 | /* It's important to pass the already-computed stat info here, |
603 | rather than, say, calling gdb_bfd_ref_ptr::new_reference. BFD by | |
604 | default will "stat" the file each time bfd_get_mtime is called -- | |
605 | and since we already entered it into the hash table using this | |
606 | mtime, if the file changed at the wrong moment, the race would | |
607 | lead to a hash table corruption. */ | |
608 | gdb_bfd_init_data (abfd, &st); | |
609 | return gdb_bfd_ref_ptr (abfd); | |
6ec53d05 TT |
610 | } |
611 | ||
4bf44c1c TT |
612 | /* A helper function that releases any section data attached to the |
613 | BFD. */ | |
614 | ||
615 | static void | |
1ce51eb5 | 616 | free_one_bfd_section (asection *sectp) |
4bf44c1c | 617 | { |
9a3c8263 | 618 | struct gdb_bfd_section_data *sect |
fd361982 | 619 | = (struct gdb_bfd_section_data *) bfd_section_userdata (sectp); |
4bf44c1c TT |
620 | |
621 | if (sect != NULL && sect->data != NULL) | |
622 | { | |
623 | #ifdef HAVE_MMAP | |
624 | if (sect->map_addr != NULL) | |
625 | { | |
626 | int res; | |
627 | ||
628 | res = munmap (sect->map_addr, sect->map_len); | |
629 | gdb_assert (res == 0); | |
630 | } | |
631 | else | |
632 | #endif | |
633 | xfree (sect->data); | |
634 | } | |
635 | } | |
636 | ||
cbb099e8 TT |
637 | /* Close ABFD, and warn if that fails. */ |
638 | ||
639 | static int | |
640 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
641 | { | |
642 | int ret; | |
b16c44de | 643 | const char *name = bfd_get_filename (abfd); |
cbb099e8 | 644 | |
1ce51eb5 TT |
645 | for (asection *sect : gdb_bfd_sections (abfd)) |
646 | free_one_bfd_section (sect); | |
4bf44c1c | 647 | |
cbb099e8 TT |
648 | ret = bfd_close (abfd); |
649 | ||
650 | if (!ret) | |
3a76f8f4 PA |
651 | gdb_bfd_close_warning (name, |
652 | bfd_errmsg (bfd_get_error ())); | |
cbb099e8 TT |
653 | |
654 | return ret; | |
655 | } | |
656 | ||
596f7d67 | 657 | /* See gdb_bfd.h. */ |
cbb099e8 | 658 | |
520b0001 | 659 | void |
cbb099e8 TT |
660 | gdb_bfd_ref (struct bfd *abfd) |
661 | { | |
6ec53d05 | 662 | struct gdb_bfd_data *gdata; |
cbb099e8 TT |
663 | |
664 | if (abfd == NULL) | |
520b0001 | 665 | return; |
cbb099e8 | 666 | |
9a3c8263 | 667 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
cbb099e8 | 668 | |
1e15fcac SM |
669 | bfd_cache_debug_printf ("Increase reference count on bfd %s (%s)", |
670 | host_address_to_string (abfd), | |
671 | bfd_get_filename (abfd)); | |
566f5e3b | 672 | |
6ec53d05 | 673 | if (gdata != NULL) |
cbb099e8 | 674 | { |
6ec53d05 | 675 | gdata->refc += 1; |
520b0001 | 676 | return; |
cbb099e8 TT |
677 | } |
678 | ||
3cae4447 TT |
679 | /* Caching only happens via gdb_bfd_open, so passing nullptr here is |
680 | fine. */ | |
681 | gdb_bfd_init_data (abfd, nullptr); | |
cbb099e8 TT |
682 | } |
683 | ||
596f7d67 | 684 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
685 | |
686 | void | |
687 | gdb_bfd_unref (struct bfd *abfd) | |
688 | { | |
6ec53d05 TT |
689 | struct gdb_bfd_data *gdata; |
690 | struct gdb_bfd_cache_search search; | |
06d5bbc8 | 691 | bfd *archive_bfd; |
cbb099e8 TT |
692 | |
693 | if (abfd == NULL) | |
694 | return; | |
695 | ||
9a3c8263 | 696 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
6ec53d05 | 697 | gdb_assert (gdata->refc >= 1); |
cbb099e8 | 698 | |
6ec53d05 TT |
699 | gdata->refc -= 1; |
700 | if (gdata->refc > 0) | |
566f5e3b | 701 | { |
1e15fcac SM |
702 | bfd_cache_debug_printf ("Decrease reference count on bfd %s (%s)", |
703 | host_address_to_string (abfd), | |
704 | bfd_get_filename (abfd)); | |
566f5e3b AB |
705 | return; |
706 | } | |
707 | ||
1e15fcac SM |
708 | bfd_cache_debug_printf ("Delete final reference count on bfd %s (%s)", |
709 | host_address_to_string (abfd), | |
710 | bfd_get_filename (abfd)); | |
cbb099e8 | 711 | |
b82d08cd | 712 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
713 | search.filename = bfd_get_filename (abfd); |
714 | ||
715 | if (gdb_bfd_cache && search.filename) | |
716 | { | |
717 | hashval_t hash = htab_hash_string (search.filename); | |
718 | void **slot; | |
719 | ||
720 | search.mtime = gdata->mtime; | |
c04fe68f AB |
721 | search.size = gdata->size; |
722 | search.inode = gdata->inode; | |
723 | search.device_id = gdata->device_id; | |
6ec53d05 TT |
724 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, |
725 | NO_INSERT); | |
726 | ||
727 | if (slot && *slot) | |
728 | htab_clear_slot (gdb_bfd_cache, slot); | |
729 | } | |
730 | ||
06d5bbc8 | 731 | delete gdata; |
00f93c44 | 732 | bfd_set_usrdata (abfd, NULL); /* Paranoia. */ |
cbb099e8 | 733 | |
d6b28940 TT |
734 | htab_remove_elt (all_bfds, abfd); |
735 | ||
cbb099e8 | 736 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
737 | |
738 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 739 | } |
4bf44c1c TT |
740 | |
741 | /* A helper function that returns the section data descriptor | |
742 | associated with SECTION. If no such descriptor exists, a new one | |
743 | is allocated and cleared. */ | |
744 | ||
745 | static struct gdb_bfd_section_data * | |
746 | get_section_descriptor (asection *section) | |
747 | { | |
748 | struct gdb_bfd_section_data *result; | |
749 | ||
fd361982 | 750 | result = (struct gdb_bfd_section_data *) bfd_section_userdata (section); |
4bf44c1c TT |
751 | |
752 | if (result == NULL) | |
753 | { | |
224c3ddb SM |
754 | result = ((struct gdb_bfd_section_data *) |
755 | bfd_zalloc (section->owner, sizeof (*result))); | |
fd361982 | 756 | bfd_set_section_userdata (section, result); |
4bf44c1c TT |
757 | } |
758 | ||
759 | return result; | |
760 | } | |
761 | ||
4bf44c1c TT |
762 | /* See gdb_bfd.h. */ |
763 | ||
764 | const gdb_byte * | |
765 | gdb_bfd_map_section (asection *sectp, bfd_size_type *size) | |
766 | { | |
767 | bfd *abfd; | |
4bf44c1c | 768 | struct gdb_bfd_section_data *descriptor; |
ea9f10bb | 769 | bfd_byte *data; |
4bf44c1c TT |
770 | |
771 | gdb_assert ((sectp->flags & SEC_RELOC) == 0); | |
772 | gdb_assert (size != NULL); | |
773 | ||
774 | abfd = sectp->owner; | |
775 | ||
776 | descriptor = get_section_descriptor (sectp); | |
777 | ||
778 | /* If the data was already read for this BFD, just reuse it. */ | |
779 | if (descriptor->data != NULL) | |
780 | goto done; | |
781 | ||
ea9f10bb TT |
782 | #ifdef HAVE_MMAP |
783 | if (!bfd_is_section_compressed (abfd, sectp)) | |
4bf44c1c | 784 | { |
ea9f10bb TT |
785 | /* The page size, used when mmapping. */ |
786 | static int pagesize; | |
4bf44c1c | 787 | |
ea9f10bb TT |
788 | if (pagesize == 0) |
789 | pagesize = getpagesize (); | |
790 | ||
791 | /* Only try to mmap sections which are large enough: we don't want | |
792 | to waste space due to fragmentation. */ | |
793 | ||
fd361982 | 794 | if (bfd_section_size (sectp) > 4 * pagesize) |
ea9f10bb | 795 | { |
fd361982 | 796 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb TT |
797 | descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ, |
798 | MAP_PRIVATE, sectp->filepos, | |
799 | &descriptor->map_addr, | |
800 | &descriptor->map_len); | |
801 | ||
802 | if ((caddr_t)descriptor->data != MAP_FAILED) | |
803 | { | |
4bf44c1c | 804 | #if HAVE_POSIX_MADVISE |
ea9f10bb TT |
805 | posix_madvise (descriptor->map_addr, descriptor->map_len, |
806 | POSIX_MADV_WILLNEED); | |
4bf44c1c | 807 | #endif |
ea9f10bb TT |
808 | goto done; |
809 | } | |
4bf44c1c | 810 | |
ea9f10bb TT |
811 | /* On failure, clear out the section data and try again. */ |
812 | memset (descriptor, 0, sizeof (*descriptor)); | |
813 | } | |
814 | } | |
4bf44c1c TT |
815 | #endif /* HAVE_MMAP */ |
816 | ||
ea9f10bb TT |
817 | /* Handle compressed sections, or ordinary uncompressed sections in |
818 | the no-mmap case. */ | |
4bf44c1c | 819 | |
fd361982 | 820 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb | 821 | descriptor->data = NULL; |
4bf44c1c | 822 | |
ea9f10bb TT |
823 | data = NULL; |
824 | if (!bfd_get_full_section_contents (abfd, sectp, &data)) | |
41667530 MG |
825 | { |
826 | warning (_("Can't read data for section '%s' in file '%s'"), | |
fd361982 | 827 | bfd_section_name (sectp), |
41667530 MG |
828 | bfd_get_filename (abfd)); |
829 | /* Set size to 0 to prevent further attempts to read the invalid | |
830 | section. */ | |
831 | *size = 0; | |
cafb3438 | 832 | return NULL; |
41667530 | 833 | } |
ea9f10bb | 834 | descriptor->data = data; |
4bf44c1c TT |
835 | |
836 | done: | |
837 | gdb_assert (descriptor->data != NULL); | |
838 | *size = descriptor->size; | |
9a3c8263 | 839 | return (const gdb_byte *) descriptor->data; |
4bf44c1c | 840 | } |
64c31149 | 841 | |
dccee2de TT |
842 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
843 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
844 | not preserved. */ | |
845 | ||
846 | static int | |
847 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
848 | { | |
849 | unsigned long file_crc = 0; | |
850 | ||
851 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
852 | { | |
853 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
854 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | for (;;) | |
859 | { | |
860 | gdb_byte buffer[8 * 1024]; | |
861 | bfd_size_type count; | |
862 | ||
863 | count = bfd_bread (buffer, sizeof (buffer), abfd); | |
864 | if (count == (bfd_size_type) -1) | |
865 | { | |
866 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
867 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
868 | return 0; | |
869 | } | |
870 | if (count == 0) | |
871 | break; | |
872 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
873 | } | |
874 | ||
875 | *file_crc_return = file_crc; | |
876 | return 1; | |
877 | } | |
878 | ||
879 | /* See gdb_bfd.h. */ | |
880 | ||
881 | int | |
882 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
883 | { | |
9a3c8263 | 884 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
dccee2de TT |
885 | |
886 | if (!gdata->crc_computed) | |
887 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
888 | ||
889 | if (gdata->crc_computed) | |
890 | *crc_out = gdata->crc; | |
891 | return gdata->crc_computed; | |
892 | } | |
893 | ||
64c31149 TT |
894 | \f |
895 | ||
896 | /* See gdb_bfd.h. */ | |
897 | ||
192b62ce | 898 | gdb_bfd_ref_ptr |
64c31149 TT |
899 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, |
900 | int fd) | |
901 | { | |
902 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
903 | ||
1831a9f9 | 904 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
905 | } |
906 | ||
907 | /* See gdb_bfd.h. */ | |
908 | ||
192b62ce | 909 | gdb_bfd_ref_ptr |
64c31149 TT |
910 | gdb_bfd_openr (const char *filename, const char *target) |
911 | { | |
912 | bfd *result = bfd_openr (filename, target); | |
913 | ||
1831a9f9 | 914 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
915 | } |
916 | ||
917 | /* See gdb_bfd.h. */ | |
918 | ||
192b62ce | 919 | gdb_bfd_ref_ptr |
64c31149 TT |
920 | gdb_bfd_openw (const char *filename, const char *target) |
921 | { | |
922 | bfd *result = bfd_openw (filename, target); | |
923 | ||
1831a9f9 | 924 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
925 | } |
926 | ||
927 | /* See gdb_bfd.h. */ | |
928 | ||
192b62ce | 929 | gdb_bfd_ref_ptr |
64c31149 TT |
930 | gdb_bfd_openr_iovec (const char *filename, const char *target, |
931 | void *(*open_func) (struct bfd *nbfd, | |
932 | void *open_closure), | |
933 | void *open_closure, | |
934 | file_ptr (*pread_func) (struct bfd *nbfd, | |
935 | void *stream, | |
936 | void *buf, | |
937 | file_ptr nbytes, | |
938 | file_ptr offset), | |
939 | int (*close_func) (struct bfd *nbfd, | |
940 | void *stream), | |
941 | int (*stat_func) (struct bfd *abfd, | |
942 | void *stream, | |
943 | struct stat *sb)) | |
944 | { | |
945 | bfd *result = bfd_openr_iovec (filename, target, | |
946 | open_func, open_closure, | |
947 | pread_func, close_func, stat_func); | |
948 | ||
1831a9f9 | 949 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
950 | } |
951 | ||
952 | /* See gdb_bfd.h. */ | |
953 | ||
0cd61f44 TT |
954 | void |
955 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
956 | { | |
957 | struct gdb_bfd_data *gdata; | |
958 | ||
959 | gdb_bfd_ref (child); | |
960 | /* No need to stash the filename here, because we also keep a | |
961 | reference on the parent archive. */ | |
962 | ||
9a3c8263 | 963 | gdata = (struct gdb_bfd_data *) bfd_usrdata (child); |
0cd61f44 TT |
964 | if (gdata->archive_bfd == NULL) |
965 | { | |
966 | gdata->archive_bfd = parent; | |
967 | gdb_bfd_ref (parent); | |
968 | } | |
969 | else | |
970 | gdb_assert (gdata->archive_bfd == parent); | |
971 | } | |
972 | ||
973 | /* See gdb_bfd.h. */ | |
974 | ||
192b62ce | 975 | gdb_bfd_ref_ptr |
64c31149 TT |
976 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) |
977 | { | |
978 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
979 | ||
980 | if (result) | |
0cd61f44 | 981 | gdb_bfd_mark_parent (result, archive); |
64c31149 | 982 | |
192b62ce | 983 | return gdb_bfd_ref_ptr (result); |
64c31149 TT |
984 | } |
985 | ||
986 | /* See gdb_bfd.h. */ | |
987 | ||
13aaf454 DE |
988 | void |
989 | gdb_bfd_record_inclusion (bfd *includer, bfd *includee) | |
990 | { | |
991 | struct gdb_bfd_data *gdata; | |
992 | ||
9a3c8263 | 993 | gdata = (struct gdb_bfd_data *) bfd_usrdata (includer); |
1831a9f9 | 994 | gdata->included_bfds.push_back (gdb_bfd_ref_ptr::new_reference (includee)); |
13aaf454 DE |
995 | } |
996 | ||
d6b28940 TT |
997 | \f |
998 | ||
65cf3563 TT |
999 | gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
1000 | ||
1001 | /* See gdb_bfd.h. */ | |
1002 | ||
1003 | int | |
1004 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
1005 | { | |
1006 | if (section == NULL) | |
1007 | return -1; | |
1008 | else if (section == bfd_com_section_ptr) | |
ce9c0ca1 | 1009 | return bfd_count_sections (abfd); |
65cf3563 | 1010 | else if (section == bfd_und_section_ptr) |
ce9c0ca1 | 1011 | return bfd_count_sections (abfd) + 1; |
65cf3563 | 1012 | else if (section == bfd_abs_section_ptr) |
ce9c0ca1 | 1013 | return bfd_count_sections (abfd) + 2; |
65cf3563 | 1014 | else if (section == bfd_ind_section_ptr) |
ce9c0ca1 | 1015 | return bfd_count_sections (abfd) + 3; |
65cf3563 TT |
1016 | return section->index; |
1017 | } | |
1018 | ||
1019 | /* See gdb_bfd.h. */ | |
1020 | ||
1021 | int | |
1022 | gdb_bfd_count_sections (bfd *abfd) | |
1023 | { | |
1024 | return bfd_count_sections (abfd) + 4; | |
1025 | } | |
1026 | ||
1da77581 TT |
1027 | /* See gdb_bfd.h. */ |
1028 | ||
1029 | int | |
1030 | gdb_bfd_requires_relocations (bfd *abfd) | |
1031 | { | |
9a3c8263 | 1032 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
1da77581 TT |
1033 | |
1034 | if (gdata->relocation_computed == 0) | |
1035 | { | |
1036 | asection *sect; | |
1037 | ||
1038 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1039 | if ((sect->flags & SEC_RELOC) != 0) | |
1040 | { | |
1041 | gdata->needs_relocations = 1; | |
1042 | break; | |
1043 | } | |
1044 | ||
1045 | gdata->relocation_computed = 1; | |
1046 | } | |
1047 | ||
1048 | return gdata->needs_relocations; | |
1049 | } | |
1050 | ||
e0fc5c3f SM |
1051 | /* See gdb_bfd.h. */ |
1052 | ||
1053 | bool | |
1054 | gdb_bfd_get_full_section_contents (bfd *abfd, asection *section, | |
1055 | gdb::byte_vector *contents) | |
1056 | { | |
1057 | bfd_size_type section_size = bfd_section_size (section); | |
1058 | ||
1059 | contents->resize (section_size); | |
1060 | ||
1061 | return bfd_get_section_contents (abfd, section, contents->data (), 0, | |
1062 | section_size); | |
1063 | } | |
65cf3563 | 1064 | |
34b965f7 TT |
1065 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" |
1066 | #define AMBIGUOUS_MESS2 \ | |
1067 | ".\nUse \"set gnutarget format-name\" to specify the format." | |
1068 | ||
1069 | /* See gdb_bfd.h. */ | |
1070 | ||
1071 | std::string | |
1072 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) | |
1073 | { | |
1074 | char **p; | |
1075 | ||
1076 | /* Check if errmsg just need simple return. */ | |
1077 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) | |
1078 | return bfd_errmsg (error_tag); | |
1079 | ||
1080 | std::string ret (bfd_errmsg (error_tag)); | |
1081 | ret += AMBIGUOUS_MESS1; | |
1082 | ||
1083 | for (p = matching; *p; p++) | |
1084 | { | |
1085 | ret += " "; | |
1086 | ret += *p; | |
1087 | } | |
1088 | ret += AMBIGUOUS_MESS2; | |
1089 | ||
1090 | xfree (matching); | |
1091 | ||
1092 | return ret; | |
1093 | } | |
1094 | ||
d6b28940 TT |
1095 | /* A callback for htab_traverse that prints a single BFD. */ |
1096 | ||
1097 | static int | |
1098 | print_one_bfd (void **slot, void *data) | |
1099 | { | |
9a3c8263 SM |
1100 | bfd *abfd = (struct bfd *) *slot; |
1101 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
1102 | struct ui_out *uiout = (struct ui_out *) data; | |
d6b28940 | 1103 | |
2e783024 | 1104 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
381befee | 1105 | uiout->field_signed ("refcount", gdata->refc); |
112e8700 | 1106 | uiout->field_string ("addr", host_address_to_string (abfd)); |
972f7a4b TT |
1107 | uiout->field_string ("filename", bfd_get_filename (abfd), |
1108 | file_name_style.style ()); | |
112e8700 | 1109 | uiout->text ("\n"); |
d6b28940 TT |
1110 | |
1111 | return 1; | |
1112 | } | |
1113 | ||
1114 | /* Implement the 'maint info bfd' command. */ | |
1115 | ||
1116 | static void | |
e4e33335 | 1117 | maintenance_info_bfds (const char *arg, int from_tty) |
d6b28940 | 1118 | { |
d6b28940 TT |
1119 | struct ui_out *uiout = current_uiout; |
1120 | ||
4a2b031d | 1121 | ui_out_emit_table table_emitter (uiout, 3, -1, "bfds"); |
112e8700 SM |
1122 | uiout->table_header (10, ui_left, "refcount", "Refcount"); |
1123 | uiout->table_header (18, ui_left, "addr", "Address"); | |
1124 | uiout->table_header (40, ui_left, "filename", "Filename"); | |
d6b28940 | 1125 | |
112e8700 | 1126 | uiout->table_body (); |
d6b28940 | 1127 | htab_traverse (all_bfds, print_one_bfd, uiout); |
d6b28940 TT |
1128 | } |
1129 | ||
84e60555 KB |
1130 | /* BFD related per-inferior data. */ |
1131 | ||
1132 | struct bfd_inferior_data | |
1133 | { | |
1134 | std::unordered_map<std::string, unsigned long> bfd_error_string_counts; | |
1135 | }; | |
1136 | ||
1137 | /* Per-inferior data key. */ | |
1138 | ||
1139 | static const registry<inferior>::key<bfd_inferior_data> bfd_inferior_data_key; | |
1140 | ||
1141 | /* Fetch per-inferior BFD data. It always returns a valid pointer to | |
1142 | a bfd_inferior_data struct. */ | |
1143 | ||
1144 | static struct bfd_inferior_data * | |
1145 | get_bfd_inferior_data (struct inferior *inf) | |
1146 | { | |
1147 | struct bfd_inferior_data *data; | |
1148 | ||
1149 | data = bfd_inferior_data_key.get (inf); | |
1150 | if (data == nullptr) | |
1151 | data = bfd_inferior_data_key.emplace (inf); | |
1152 | ||
1153 | return data; | |
1154 | } | |
1155 | ||
1156 | /* Increment the BFD error count for STR and return the updated | |
1157 | count. */ | |
1158 | ||
1159 | static unsigned long | |
1160 | increment_bfd_error_count (std::string str) | |
1161 | { | |
1162 | struct bfd_inferior_data *bid = get_bfd_inferior_data (current_inferior ()); | |
1163 | ||
1164 | auto &map = bid->bfd_error_string_counts; | |
1165 | return ++map[std::move (str)]; | |
1166 | } | |
1167 | ||
1168 | static bfd_error_handler_type default_bfd_error_handler; | |
1169 | ||
1170 | /* Define a BFD error handler which will suppress the printing of | |
1171 | messages which have been printed once already. This is done on a | |
1172 | per-inferior basis. */ | |
1173 | ||
77b7377b | 1174 | static void ATTRIBUTE_PRINTF (1, 0) |
84e60555 KB |
1175 | gdb_bfd_error_handler (const char *fmt, va_list ap) |
1176 | { | |
1177 | va_list ap_copy; | |
1178 | ||
1179 | va_copy(ap_copy, ap); | |
1180 | const std::string str = string_vprintf (fmt, ap_copy); | |
1181 | va_end (ap_copy); | |
1182 | ||
1183 | if (increment_bfd_error_count (std::move (str)) > 1) | |
1184 | return; | |
1185 | ||
1186 | /* We must call the BFD mechanism for printing format strings since | |
1187 | it supports additional format specifiers that GDB's vwarning() doesn't | |
1188 | recognize. It also outputs additional text, i.e. "BFD: ", which | |
1189 | makes it clear that it's a BFD warning/error. */ | |
1190 | (*default_bfd_error_handler) (fmt, ap); | |
1191 | } | |
1192 | ||
6c265988 | 1193 | void _initialize_gdb_bfd (); |
d6b28940 | 1194 | void |
6c265988 | 1195 | _initialize_gdb_bfd () |
d6b28940 TT |
1196 | { |
1197 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
1198 | NULL, xcalloc, xfree); | |
1199 | ||
1200 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
1201 | List the BFDs that are currently open."), | |
1202 | &maintenanceinfolist); | |
18989b3c AB |
1203 | |
1204 | add_setshow_boolean_cmd ("bfd-sharing", no_class, | |
1205 | &bfd_sharing, _("\ | |
1206 | Set whether gdb will share bfds that appear to be the same file."), _("\ | |
1207 | Show whether gdb will share bfds that appear to be the same file."), _("\ | |
1208 | When enabled gdb will reuse existing bfds rather than reopening the\n\ | |
1209 | same file. To decide if two files are the same then gdb compares the\n\ | |
1210 | filename, file size, file modification time, and file inode."), | |
1211 | NULL, | |
1212 | &show_bfd_sharing, | |
1213 | &maintenance_set_cmdlist, | |
1214 | &maintenance_show_cmdlist); | |
566f5e3b | 1215 | |
d4dd4fca SM |
1216 | add_setshow_boolean_cmd ("bfd-cache", class_maintenance, |
1217 | &debug_bfd_cache, | |
1218 | _("Set bfd cache debugging."), | |
1219 | _("Show bfd cache debugging."), | |
1220 | _("\ | |
566f5e3b | 1221 | When non-zero, bfd cache specific debugging is enabled."), |
d4dd4fca SM |
1222 | NULL, |
1223 | &show_bfd_cache_debug, | |
1224 | &setdebuglist, &showdebuglist); | |
84e60555 KB |
1225 | |
1226 | /* Hook the BFD error/warning handler to limit amount of output. */ | |
1227 | default_bfd_error_handler = bfd_set_error_handler (gdb_bfd_error_handler); | |
d6b28940 | 1228 | } |