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Commit | Line | Data |
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cbb099e8 TT |
1 | /* Definitions for BFD wrappers used by GDB. |
2 | ||
1d506c26 | 3 | Copyright (C) 2011-2024 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 | ||
cbb099e8 | 20 | #include "gdb_bfd.h" |
e5dc0d5d | 21 | #include "event-top.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 | 37 | |
da0e2ac4 TT |
38 | #if CXX_STD_THREAD |
39 | ||
40 | #include <mutex> | |
41 | ||
42 | /* Lock held when doing BFD operations. A recursive mutex is used | |
43 | because we use this mutex internally and also for BFD, just to make | |
44 | life a bit simpler, and we may sometimes hold it while calling into | |
45 | BFD. */ | |
46 | static std::recursive_mutex gdb_bfd_mutex; | |
47 | ||
48 | /* BFD locking function. */ | |
49 | ||
50 | static bool | |
51 | gdb_bfd_lock (void *ignore) | |
52 | { | |
53 | gdb_bfd_mutex.lock (); | |
54 | return true; | |
55 | } | |
56 | ||
57 | /* BFD unlocking function. */ | |
58 | ||
59 | static bool | |
60 | gdb_bfd_unlock (void *ignore) | |
61 | { | |
62 | gdb_bfd_mutex.unlock (); | |
63 | return true; | |
64 | } | |
65 | ||
66 | #endif /* CXX_STD_THREAD */ | |
67 | ||
4bf44c1c TT |
68 | /* An object of this type is stored in the section's user data when |
69 | mapping a section. */ | |
70 | ||
71 | struct gdb_bfd_section_data | |
72 | { | |
73 | /* Size of the data. */ | |
033679b1 | 74 | size_t size; |
4bf44c1c | 75 | /* If the data was mmapped, this is the length of the map. */ |
033679b1 | 76 | size_t map_len; |
4bf44c1c TT |
77 | /* The data. If NULL, the section data has not been read. */ |
78 | void *data; | |
79 | /* If the data was mmapped, this is the map address. */ | |
80 | void *map_addr; | |
81 | }; | |
a4453b7e | 82 | |
d6b28940 TT |
83 | /* A hash table holding every BFD that gdb knows about. This is not |
84 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
85 | BFDs; in contrast, this hash is used just to implement | |
86 | "maint info bfd". */ | |
87 | ||
88 | static htab_t all_bfds; | |
89 | ||
6ec53d05 TT |
90 | /* An object of this type is stored in each BFD's user data. */ |
91 | ||
92 | struct gdb_bfd_data | |
93 | { | |
3cae4447 TT |
94 | /* Note that if ST is nullptr, then we simply fill in zeroes. */ |
95 | gdb_bfd_data (bfd *abfd, struct stat *st) | |
96 | : mtime (st == nullptr ? 0 : st->st_mtime), | |
97 | size (st == nullptr ? 0 : st->st_size), | |
98 | inode (st == nullptr ? 0 : st->st_ino), | |
99 | device_id (st == nullptr ? 0 : st->st_dev), | |
06d5bbc8 TT |
100 | relocation_computed (0), |
101 | needs_relocations (0), | |
102 | crc_computed (0) | |
103 | { | |
06d5bbc8 TT |
104 | } |
105 | ||
106 | ~gdb_bfd_data () | |
107 | { | |
06d5bbc8 TT |
108 | } |
109 | ||
6ec53d05 | 110 | /* The reference count. */ |
06d5bbc8 | 111 | int refc = 1; |
6ec53d05 TT |
112 | |
113 | /* The mtime of the BFD at the point the cache entry was made. */ | |
114 | time_t mtime; | |
b82d08cd | 115 | |
c04fe68f AB |
116 | /* The file size (in bytes) at the point the cache entry was made. */ |
117 | off_t size; | |
118 | ||
119 | /* The inode of the file at the point the cache entry was made. */ | |
120 | ino_t inode; | |
121 | ||
122 | /* The device id of the file at the point the cache entry was made. */ | |
123 | dev_t device_id; | |
124 | ||
1da77581 TT |
125 | /* This is true if we have determined whether this BFD has any |
126 | sections requiring relocation. */ | |
127 | unsigned int relocation_computed : 1; | |
128 | ||
129 | /* This is true if any section needs relocation. */ | |
130 | unsigned int needs_relocations : 1; | |
131 | ||
dccee2de TT |
132 | /* This is true if we have successfully computed the file's CRC. */ |
133 | unsigned int crc_computed : 1; | |
134 | ||
135 | /* The file's CRC. */ | |
06d5bbc8 | 136 | unsigned long crc = 0; |
dccee2de | 137 | |
b82d08cd TT |
138 | /* If the BFD comes from an archive, this points to the archive's |
139 | BFD. Otherwise, this is NULL. */ | |
06d5bbc8 | 140 | bfd *archive_bfd = nullptr; |
e992eda4 | 141 | |
13aaf454 | 142 | /* Table of all the bfds this bfd has included. */ |
d5833c62 | 143 | std::vector<gdb_bfd_ref_ptr> included_bfds; |
13aaf454 | 144 | |
e992eda4 | 145 | /* The registry. */ |
08b8a139 | 146 | registry<bfd> registry_fields; |
6ec53d05 TT |
147 | }; |
148 | ||
08b8a139 TT |
149 | registry<bfd> * |
150 | registry_accessor<bfd>::get (bfd *abfd) | |
151 | { | |
152 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
153 | return &gdata->registry_fields; | |
154 | } | |
e992eda4 | 155 | |
6ec53d05 TT |
156 | /* A hash table storing all the BFDs maintained in the cache. */ |
157 | ||
158 | static htab_t gdb_bfd_cache; | |
159 | ||
18989b3c AB |
160 | /* When true gdb will reuse an existing bfd object if the filename, |
161 | modification time, and file size all match. */ | |
162 | ||
491144b5 | 163 | static bool bfd_sharing = true; |
18989b3c AB |
164 | static void |
165 | show_bfd_sharing (struct ui_file *file, int from_tty, | |
166 | struct cmd_list_element *c, const char *value) | |
167 | { | |
6cb06a8c | 168 | gdb_printf (file, _("BFD sharing is %s.\n"), value); |
18989b3c AB |
169 | } |
170 | ||
d4dd4fca SM |
171 | /* When true debugging of the bfd caches is enabled. */ |
172 | ||
173 | static bool debug_bfd_cache; | |
566f5e3b | 174 | |
1e15fcac SM |
175 | /* Print an "bfd-cache" debug statement. */ |
176 | ||
177 | #define bfd_cache_debug_printf(fmt, ...) \ | |
178 | debug_prefixed_printf_cond (debug_bfd_cache, "bfd-cache", fmt, ##__VA_ARGS__) | |
179 | ||
566f5e3b AB |
180 | static void |
181 | show_bfd_cache_debug (struct ui_file *file, int from_tty, | |
182 | struct cmd_list_element *c, const char *value) | |
183 | { | |
6cb06a8c | 184 | gdb_printf (file, _("BFD cache debugging is %s.\n"), value); |
566f5e3b AB |
185 | } |
186 | ||
6ec53d05 TT |
187 | /* The type of an object being looked up in gdb_bfd_cache. We use |
188 | htab's capability of storing one kind of object (BFD in this case) | |
189 | and using a different sort of object for searching. */ | |
190 | ||
191 | struct gdb_bfd_cache_search | |
192 | { | |
193 | /* The filename. */ | |
194 | const char *filename; | |
195 | /* The mtime. */ | |
196 | time_t mtime; | |
c04fe68f AB |
197 | /* The file size (in bytes). */ |
198 | off_t size; | |
199 | /* The inode of the file. */ | |
200 | ino_t inode; | |
201 | /* The device id of the file. */ | |
202 | dev_t device_id; | |
6ec53d05 TT |
203 | }; |
204 | ||
205 | /* A hash function for BFDs. */ | |
206 | ||
207 | static hashval_t | |
208 | hash_bfd (const void *b) | |
209 | { | |
9a3c8263 | 210 | const bfd *abfd = (const struct bfd *) b; |
6ec53d05 TT |
211 | |
212 | /* It is simplest to just hash the filename. */ | |
213 | return htab_hash_string (bfd_get_filename (abfd)); | |
214 | } | |
215 | ||
216 | /* An equality function for BFDs. Note that this expects the caller | |
217 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
218 | ||
219 | static int | |
220 | eq_bfd (const void *a, const void *b) | |
221 | { | |
9a3c8263 SM |
222 | const bfd *abfd = (const struct bfd *) a; |
223 | const struct gdb_bfd_cache_search *s | |
224 | = (const struct gdb_bfd_cache_search *) b; | |
225 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
6ec53d05 TT |
226 | |
227 | return (gdata->mtime == s->mtime | |
c04fe68f AB |
228 | && gdata->size == s->size |
229 | && gdata->inode == s->inode | |
230 | && gdata->device_id == s->device_id | |
6ec53d05 TT |
231 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); |
232 | } | |
233 | ||
234 | /* See gdb_bfd.h. */ | |
235 | ||
f08e97fe GB |
236 | int |
237 | is_target_filename (const char *name) | |
238 | { | |
239 | return startswith (name, TARGET_SYSROOT_PREFIX); | |
240 | } | |
241 | ||
242 | /* See gdb_bfd.h. */ | |
243 | ||
244 | int | |
245 | gdb_bfd_has_target_filename (struct bfd *abfd) | |
246 | { | |
247 | return is_target_filename (bfd_get_filename (abfd)); | |
248 | } | |
249 | ||
66984afd AB |
250 | /* For `gdb_bfd_open_from_target_memory`. An object that manages the |
251 | details of a BFD in target memory. */ | |
15cc148f | 252 | |
4d2edefa | 253 | struct target_buffer : public gdb_bfd_iovec_base |
15cc148f | 254 | { |
66984afd AB |
255 | /* Constructor. BASE and SIZE define where the BFD can be found in |
256 | target memory. */ | |
257 | target_buffer (CORE_ADDR base, ULONGEST size) | |
258 | : m_base (base), | |
5153027c | 259 | m_size (size), |
c96ceed9 MM |
260 | m_filename (xstrprintf ("<in-memory@%s-%s>", |
261 | core_addr_to_string_nz (m_base), | |
262 | core_addr_to_string_nz (m_base + m_size))) | |
66984afd | 263 | { |
66984afd AB |
264 | } |
265 | ||
266 | /* Return the size of the in-memory BFD file. */ | |
267 | ULONGEST size () const | |
268 | { return m_size; } | |
269 | ||
270 | /* Return the base address of the in-memory BFD file. */ | |
271 | CORE_ADDR base () const | |
272 | { return m_base; } | |
273 | ||
274 | /* Return a generated filename for the in-memory BFD file. The generated | |
c96ceed9 | 275 | name will include the begin and end address of the in-memory file. */ |
66984afd AB |
276 | const char *filename () const |
277 | { return m_filename.get (); } | |
278 | ||
4d2edefa TT |
279 | file_ptr read (bfd *abfd, void *buffer, file_ptr nbytes, |
280 | file_ptr offset) override; | |
281 | ||
282 | int stat (struct bfd *abfd, struct stat *sb) override; | |
283 | ||
66984afd AB |
284 | private: |
285 | /* The base address of the in-memory BFD file. */ | |
286 | CORE_ADDR m_base; | |
287 | ||
288 | /* The size (in-bytes) of the in-memory BFD file. */ | |
289 | ULONGEST m_size; | |
290 | ||
291 | /* Holds the generated name of the in-memory BFD file. */ | |
292 | gdb::unique_xmalloc_ptr<char> m_filename; | |
15cc148f MS |
293 | }; |
294 | ||
15cc148f MS |
295 | /* For `gdb_bfd_open_from_target_memory`. For reading the file, we just need to |
296 | pass through to target_read_memory and fix up the arguments and return | |
297 | values. */ | |
298 | ||
4d2edefa TT |
299 | file_ptr |
300 | target_buffer::read (struct bfd *abfd, void *buf, | |
15cc148f MS |
301 | file_ptr nbytes, file_ptr offset) |
302 | { | |
15cc148f | 303 | /* If this read will read all of the file, limit it to just the rest. */ |
4d2edefa TT |
304 | if (offset + nbytes > size ()) |
305 | nbytes = size () - offset; | |
15cc148f MS |
306 | |
307 | /* If there are no more bytes left, we've reached EOF. */ | |
308 | if (nbytes == 0) | |
309 | return 0; | |
310 | ||
4d2edefa | 311 | int err = target_read_memory (base () + offset, (gdb_byte *) buf, nbytes); |
15cc148f MS |
312 | if (err) |
313 | return -1; | |
314 | ||
315 | return nbytes; | |
316 | } | |
317 | ||
318 | /* For `gdb_bfd_open_from_target_memory`. For statting the file, we only | |
319 | support the st_size attribute. */ | |
320 | ||
4d2edefa TT |
321 | int |
322 | target_buffer::stat (struct bfd *abfd, struct stat *sb) | |
15cc148f | 323 | { |
15cc148f | 324 | memset (sb, 0, sizeof (struct stat)); |
4d2edefa | 325 | sb->st_size = size (); |
15cc148f MS |
326 | return 0; |
327 | } | |
328 | ||
329 | /* See gdb_bfd.h. */ | |
330 | ||
331 | gdb_bfd_ref_ptr | |
332 | gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, | |
322dd71c | 333 | const char *target) |
15cc148f | 334 | { |
4d2edefa | 335 | std::unique_ptr<target_buffer> buffer |
6b62451a | 336 | = std::make_unique<target_buffer> (addr, size); |
15cc148f | 337 | |
66984afd | 338 | return gdb_bfd_openr_iovec (buffer->filename (), target, |
4d2edefa TT |
339 | [&] (bfd *nbfd) |
340 | { | |
341 | return buffer.release (); | |
342 | }); | |
15cc148f | 343 | } |
f08e97fe | 344 | |
dcc04527 TT |
345 | /* An object that manages the underlying stream for a BFD, using |
346 | target file I/O. */ | |
347 | ||
348 | struct target_fileio_stream : public gdb_bfd_iovec_base | |
98c59b52 | 349 | { |
dcc04527 TT |
350 | target_fileio_stream (bfd *nbfd, int fd) |
351 | : m_bfd (nbfd), | |
352 | m_fd (fd) | |
353 | { | |
354 | } | |
355 | ||
356 | ~target_fileio_stream (); | |
357 | ||
358 | file_ptr read (bfd *abfd, void *buffer, file_ptr nbytes, | |
359 | file_ptr offset) override; | |
360 | ||
361 | int stat (struct bfd *abfd, struct stat *sb) override; | |
362 | ||
363 | private: | |
364 | ||
365 | /* The BFD. Saved for the destructor. */ | |
366 | bfd *m_bfd; | |
367 | ||
368 | /* The file descriptor. */ | |
369 | int m_fd; | |
98c59b52 PA |
370 | }; |
371 | ||
dcc04527 TT |
372 | /* Wrapper for target_fileio_open suitable for use as a helper |
373 | function for gdb_bfd_openr_iovec. */ | |
f08e97fe | 374 | |
dcc04527 TT |
375 | static target_fileio_stream * |
376 | gdb_bfd_iovec_fileio_open (struct bfd *abfd, inferior *inf, bool warn_if_slow) | |
f08e97fe GB |
377 | { |
378 | const char *filename = bfd_get_filename (abfd); | |
b872057a SM |
379 | int fd; |
380 | fileio_error target_errno; | |
f08e97fe GB |
381 | |
382 | gdb_assert (is_target_filename (filename)); | |
383 | ||
dcc04527 | 384 | fd = target_fileio_open (inf, |
4111f652 | 385 | filename + strlen (TARGET_SYSROOT_PREFIX), |
dcc04527 | 386 | FILEIO_O_RDONLY, 0, warn_if_slow, |
4111f652 | 387 | &target_errno); |
f08e97fe GB |
388 | if (fd == -1) |
389 | { | |
517a63c2 | 390 | errno = fileio_error_to_host (target_errno); |
f08e97fe GB |
391 | bfd_set_error (bfd_error_system_call); |
392 | return NULL; | |
393 | } | |
394 | ||
dcc04527 | 395 | return new target_fileio_stream (abfd, fd); |
f08e97fe GB |
396 | } |
397 | ||
dcc04527 | 398 | /* Wrapper for target_fileio_pread. */ |
f08e97fe | 399 | |
dcc04527 TT |
400 | file_ptr |
401 | target_fileio_stream::read (struct bfd *abfd, void *buf, | |
f08e97fe GB |
402 | file_ptr nbytes, file_ptr offset) |
403 | { | |
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 | ||
dcc04527 | 412 | bytes = target_fileio_pread (m_fd, (gdb_byte *) buf + pos, |
f08e97fe GB |
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 | { | |
517a63c2 | 420 | errno = fileio_error_to_host (target_errno); |
f08e97fe GB |
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 | ||
dcc04527 | 440 | /* Wrapper for target_fileio_close. */ |
f08e97fe | 441 | |
dcc04527 | 442 | target_fileio_stream::~target_fileio_stream () |
f08e97fe | 443 | { |
b872057a | 444 | fileio_error target_errno; |
f08e97fe | 445 | |
f08e97fe GB |
446 | /* Ignore errors on close. These may happen with remote |
447 | targets if the connection has already been torn down. */ | |
3a76f8f4 PA |
448 | try |
449 | { | |
dcc04527 | 450 | target_fileio_close (m_fd, &target_errno); |
3a76f8f4 PA |
451 | } |
452 | catch (const gdb_exception &ex) | |
453 | { | |
454 | /* Also avoid crossing exceptions over bfd. */ | |
dcc04527 | 455 | gdb_bfd_close_warning (bfd_get_filename (m_bfd), |
3a76f8f4 PA |
456 | ex.message->c_str ()); |
457 | } | |
f08e97fe GB |
458 | } |
459 | ||
dcc04527 | 460 | /* Wrapper for target_fileio_fstat. */ |
f08e97fe | 461 | |
dcc04527 TT |
462 | int |
463 | target_fileio_stream::stat (struct bfd *abfd, struct stat *sb) | |
f08e97fe | 464 | { |
b872057a | 465 | fileio_error target_errno; |
f08e97fe GB |
466 | int result; |
467 | ||
dcc04527 | 468 | result = target_fileio_fstat (m_fd, sb, &target_errno); |
f08e97fe GB |
469 | if (result == -1) |
470 | { | |
517a63c2 | 471 | errno = fileio_error_to_host (target_errno); |
f08e97fe GB |
472 | bfd_set_error (bfd_error_system_call); |
473 | } | |
474 | ||
475 | return result; | |
476 | } | |
477 | ||
3cae4447 TT |
478 | /* A helper function to initialize the data that gdb attaches to each |
479 | BFD. */ | |
480 | ||
481 | static void | |
482 | gdb_bfd_init_data (struct bfd *abfd, struct stat *st) | |
483 | { | |
484 | struct gdb_bfd_data *gdata; | |
485 | void **slot; | |
486 | ||
487 | gdb_assert (bfd_usrdata (abfd) == nullptr); | |
488 | ||
489 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ | |
490 | abfd->flags |= BFD_DECOMPRESS; | |
491 | ||
492 | gdata = new gdb_bfd_data (abfd, st); | |
493 | bfd_set_usrdata (abfd, gdata); | |
3cae4447 TT |
494 | |
495 | /* This is the first we've seen it, so add it to the hash table. */ | |
496 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
497 | gdb_assert (slot && !*slot); | |
498 | *slot = abfd; | |
499 | } | |
500 | ||
f08e97fe GB |
501 | /* See gdb_bfd.h. */ |
502 | ||
192b62ce | 503 | gdb_bfd_ref_ptr |
98c59b52 PA |
504 | gdb_bfd_open (const char *name, const char *target, int fd, |
505 | bool warn_if_slow) | |
6ec53d05 TT |
506 | { |
507 | hashval_t hash; | |
508 | void **slot; | |
509 | bfd *abfd; | |
510 | struct gdb_bfd_cache_search search; | |
511 | struct stat st; | |
512 | ||
f08e97fe GB |
513 | if (is_target_filename (name)) |
514 | { | |
515 | if (!target_filesystem_is_local ()) | |
516 | { | |
517 | gdb_assert (fd == -1); | |
518 | ||
dcc04527 TT |
519 | auto open = [&] (bfd *nbfd) -> gdb_bfd_iovec_base * |
520 | { | |
521 | return gdb_bfd_iovec_fileio_open (nbfd, current_inferior (), | |
522 | warn_if_slow); | |
523 | }; | |
524 | ||
525 | return gdb_bfd_openr_iovec (name, target, open); | |
f08e97fe GB |
526 | } |
527 | ||
528 | name += strlen (TARGET_SYSROOT_PREFIX); | |
529 | } | |
530 | ||
da0e2ac4 TT |
531 | #if CXX_STD_THREAD |
532 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
533 | #endif | |
534 | ||
6ec53d05 TT |
535 | if (gdb_bfd_cache == NULL) |
536 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
537 | xcalloc, xfree); | |
538 | ||
539 | if (fd == -1) | |
540 | { | |
13084383 | 541 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0).release (); |
6ec53d05 TT |
542 | if (fd == -1) |
543 | { | |
544 | bfd_set_error (bfd_error_system_call); | |
545 | return NULL; | |
546 | } | |
547 | } | |
548 | ||
6ec53d05 TT |
549 | if (fstat (fd, &st) < 0) |
550 | { | |
3cae4447 | 551 | /* Weird situation here -- don't cache if we can't stat. */ |
1e15fcac | 552 | bfd_cache_debug_printf ("Could not stat %s - not caching", name); |
03b0a45f TT |
553 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); |
554 | if (abfd == nullptr) | |
555 | return nullptr; | |
3cae4447 | 556 | return gdb_bfd_ref_ptr::new_reference (abfd); |
c04fe68f | 557 | } |
6ec53d05 | 558 | |
3cae4447 TT |
559 | search.filename = name; |
560 | search.mtime = st.st_mtime; | |
561 | search.size = st.st_size; | |
562 | search.inode = st.st_ino; | |
563 | search.device_id = st.st_dev; | |
564 | ||
6ec53d05 TT |
565 | /* Note that this must compute the same result as hash_bfd. */ |
566 | hash = htab_hash_string (name); | |
567 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
568 | opening the BFD may fail; and this would violate hashtab | |
569 | invariants. */ | |
9a3c8263 | 570 | abfd = (struct bfd *) htab_find_with_hash (gdb_bfd_cache, &search, hash); |
18989b3c | 571 | if (bfd_sharing && abfd != NULL) |
6ec53d05 | 572 | { |
1e15fcac SM |
573 | bfd_cache_debug_printf ("Reusing cached bfd %s for %s", |
574 | host_address_to_string (abfd), | |
575 | bfd_get_filename (abfd)); | |
6ec53d05 | 576 | close (fd); |
1831a9f9 | 577 | return gdb_bfd_ref_ptr::new_reference (abfd); |
6ec53d05 TT |
578 | } |
579 | ||
580 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
581 | if (abfd == NULL) | |
582 | return NULL; | |
583 | ||
0ecf4403 TT |
584 | bfd_set_cacheable (abfd, 1); |
585 | ||
1e15fcac SM |
586 | bfd_cache_debug_printf ("Creating new bfd %s for %s", |
587 | host_address_to_string (abfd), | |
588 | bfd_get_filename (abfd)); | |
566f5e3b | 589 | |
18989b3c AB |
590 | if (bfd_sharing) |
591 | { | |
592 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
593 | gdb_assert (!*slot); | |
594 | *slot = abfd; | |
595 | } | |
6ec53d05 | 596 | |
3cae4447 TT |
597 | /* It's important to pass the already-computed stat info here, |
598 | rather than, say, calling gdb_bfd_ref_ptr::new_reference. BFD by | |
599 | default will "stat" the file each time bfd_get_mtime is called -- | |
600 | and since we already entered it into the hash table using this | |
601 | mtime, if the file changed at the wrong moment, the race would | |
602 | lead to a hash table corruption. */ | |
603 | gdb_bfd_init_data (abfd, &st); | |
604 | return gdb_bfd_ref_ptr (abfd); | |
6ec53d05 TT |
605 | } |
606 | ||
4bf44c1c TT |
607 | /* A helper function that releases any section data attached to the |
608 | BFD. */ | |
609 | ||
610 | static void | |
1ce51eb5 | 611 | free_one_bfd_section (asection *sectp) |
4bf44c1c | 612 | { |
9a3c8263 | 613 | struct gdb_bfd_section_data *sect |
fd361982 | 614 | = (struct gdb_bfd_section_data *) bfd_section_userdata (sectp); |
4bf44c1c TT |
615 | |
616 | if (sect != NULL && sect->data != NULL) | |
617 | { | |
618 | #ifdef HAVE_MMAP | |
619 | if (sect->map_addr != NULL) | |
620 | { | |
621 | int res; | |
622 | ||
623 | res = munmap (sect->map_addr, sect->map_len); | |
624 | gdb_assert (res == 0); | |
625 | } | |
626 | else | |
627 | #endif | |
628 | xfree (sect->data); | |
629 | } | |
630 | } | |
631 | ||
cbb099e8 TT |
632 | /* Close ABFD, and warn if that fails. */ |
633 | ||
634 | static int | |
635 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
636 | { | |
637 | int ret; | |
b16c44de | 638 | const char *name = bfd_get_filename (abfd); |
cbb099e8 | 639 | |
1ce51eb5 TT |
640 | for (asection *sect : gdb_bfd_sections (abfd)) |
641 | free_one_bfd_section (sect); | |
4bf44c1c | 642 | |
cbb099e8 TT |
643 | ret = bfd_close (abfd); |
644 | ||
645 | if (!ret) | |
3a76f8f4 PA |
646 | gdb_bfd_close_warning (name, |
647 | bfd_errmsg (bfd_get_error ())); | |
cbb099e8 TT |
648 | |
649 | return ret; | |
650 | } | |
651 | ||
596f7d67 | 652 | /* See gdb_bfd.h. */ |
cbb099e8 | 653 | |
520b0001 | 654 | void |
cbb099e8 TT |
655 | gdb_bfd_ref (struct bfd *abfd) |
656 | { | |
6ec53d05 | 657 | struct gdb_bfd_data *gdata; |
cbb099e8 TT |
658 | |
659 | if (abfd == NULL) | |
520b0001 | 660 | return; |
cbb099e8 | 661 | |
da0e2ac4 TT |
662 | #if CXX_STD_THREAD |
663 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
664 | #endif | |
665 | ||
9a3c8263 | 666 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
cbb099e8 | 667 | |
1e15fcac SM |
668 | bfd_cache_debug_printf ("Increase reference count on bfd %s (%s)", |
669 | host_address_to_string (abfd), | |
670 | bfd_get_filename (abfd)); | |
566f5e3b | 671 | |
6ec53d05 | 672 | if (gdata != NULL) |
cbb099e8 | 673 | { |
6ec53d05 | 674 | gdata->refc += 1; |
520b0001 | 675 | return; |
cbb099e8 TT |
676 | } |
677 | ||
3cae4447 TT |
678 | /* Caching only happens via gdb_bfd_open, so passing nullptr here is |
679 | fine. */ | |
680 | gdb_bfd_init_data (abfd, nullptr); | |
cbb099e8 TT |
681 | } |
682 | ||
596f7d67 | 683 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
684 | |
685 | void | |
686 | gdb_bfd_unref (struct bfd *abfd) | |
687 | { | |
6ec53d05 TT |
688 | struct gdb_bfd_data *gdata; |
689 | struct gdb_bfd_cache_search search; | |
06d5bbc8 | 690 | bfd *archive_bfd; |
cbb099e8 TT |
691 | |
692 | if (abfd == NULL) | |
693 | return; | |
694 | ||
da0e2ac4 TT |
695 | #if CXX_STD_THREAD |
696 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
697 | #endif | |
698 | ||
9a3c8263 | 699 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
6ec53d05 | 700 | gdb_assert (gdata->refc >= 1); |
cbb099e8 | 701 | |
6ec53d05 TT |
702 | gdata->refc -= 1; |
703 | if (gdata->refc > 0) | |
566f5e3b | 704 | { |
1e15fcac SM |
705 | bfd_cache_debug_printf ("Decrease reference count on bfd %s (%s)", |
706 | host_address_to_string (abfd), | |
707 | bfd_get_filename (abfd)); | |
566f5e3b AB |
708 | return; |
709 | } | |
710 | ||
1e15fcac SM |
711 | bfd_cache_debug_printf ("Delete final reference count on bfd %s (%s)", |
712 | host_address_to_string (abfd), | |
713 | bfd_get_filename (abfd)); | |
cbb099e8 | 714 | |
b82d08cd | 715 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
716 | search.filename = bfd_get_filename (abfd); |
717 | ||
718 | if (gdb_bfd_cache && search.filename) | |
719 | { | |
720 | hashval_t hash = htab_hash_string (search.filename); | |
721 | void **slot; | |
722 | ||
723 | search.mtime = gdata->mtime; | |
c04fe68f AB |
724 | search.size = gdata->size; |
725 | search.inode = gdata->inode; | |
726 | search.device_id = gdata->device_id; | |
6ec53d05 TT |
727 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, |
728 | NO_INSERT); | |
729 | ||
730 | if (slot && *slot) | |
731 | htab_clear_slot (gdb_bfd_cache, slot); | |
732 | } | |
733 | ||
06d5bbc8 | 734 | delete gdata; |
00f93c44 | 735 | bfd_set_usrdata (abfd, NULL); /* Paranoia. */ |
cbb099e8 | 736 | |
d6b28940 TT |
737 | htab_remove_elt (all_bfds, abfd); |
738 | ||
cbb099e8 | 739 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
740 | |
741 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 742 | } |
4bf44c1c TT |
743 | |
744 | /* A helper function that returns the section data descriptor | |
745 | associated with SECTION. If no such descriptor exists, a new one | |
746 | is allocated and cleared. */ | |
747 | ||
748 | static struct gdb_bfd_section_data * | |
749 | get_section_descriptor (asection *section) | |
750 | { | |
751 | struct gdb_bfd_section_data *result; | |
752 | ||
fd361982 | 753 | result = (struct gdb_bfd_section_data *) bfd_section_userdata (section); |
4bf44c1c TT |
754 | |
755 | if (result == NULL) | |
756 | { | |
224c3ddb SM |
757 | result = ((struct gdb_bfd_section_data *) |
758 | bfd_zalloc (section->owner, sizeof (*result))); | |
fd361982 | 759 | bfd_set_section_userdata (section, result); |
4bf44c1c TT |
760 | } |
761 | ||
762 | return result; | |
763 | } | |
764 | ||
4bf44c1c TT |
765 | /* See gdb_bfd.h. */ |
766 | ||
767 | const gdb_byte * | |
768 | gdb_bfd_map_section (asection *sectp, bfd_size_type *size) | |
769 | { | |
770 | bfd *abfd; | |
4bf44c1c | 771 | struct gdb_bfd_section_data *descriptor; |
ea9f10bb | 772 | bfd_byte *data; |
4bf44c1c TT |
773 | |
774 | gdb_assert ((sectp->flags & SEC_RELOC) == 0); | |
775 | gdb_assert (size != NULL); | |
776 | ||
777 | abfd = sectp->owner; | |
778 | ||
779 | descriptor = get_section_descriptor (sectp); | |
780 | ||
781 | /* If the data was already read for this BFD, just reuse it. */ | |
782 | if (descriptor->data != NULL) | |
783 | goto done; | |
784 | ||
ea9f10bb TT |
785 | #ifdef HAVE_MMAP |
786 | if (!bfd_is_section_compressed (abfd, sectp)) | |
4bf44c1c | 787 | { |
ea9f10bb TT |
788 | /* The page size, used when mmapping. */ |
789 | static int pagesize; | |
4bf44c1c | 790 | |
ea9f10bb TT |
791 | if (pagesize == 0) |
792 | pagesize = getpagesize (); | |
793 | ||
794 | /* Only try to mmap sections which are large enough: we don't want | |
795 | to waste space due to fragmentation. */ | |
796 | ||
fd361982 | 797 | if (bfd_section_size (sectp) > 4 * pagesize) |
ea9f10bb | 798 | { |
fd361982 | 799 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb TT |
800 | descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ, |
801 | MAP_PRIVATE, sectp->filepos, | |
802 | &descriptor->map_addr, | |
803 | &descriptor->map_len); | |
804 | ||
805 | if ((caddr_t)descriptor->data != MAP_FAILED) | |
806 | { | |
4bf44c1c | 807 | #if HAVE_POSIX_MADVISE |
ea9f10bb TT |
808 | posix_madvise (descriptor->map_addr, descriptor->map_len, |
809 | POSIX_MADV_WILLNEED); | |
4bf44c1c | 810 | #endif |
ea9f10bb TT |
811 | goto done; |
812 | } | |
4bf44c1c | 813 | |
ea9f10bb TT |
814 | /* On failure, clear out the section data and try again. */ |
815 | memset (descriptor, 0, sizeof (*descriptor)); | |
816 | } | |
817 | } | |
4bf44c1c TT |
818 | #endif /* HAVE_MMAP */ |
819 | ||
ea9f10bb TT |
820 | /* Handle compressed sections, or ordinary uncompressed sections in |
821 | the no-mmap case. */ | |
4bf44c1c | 822 | |
fd361982 | 823 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb | 824 | descriptor->data = NULL; |
4bf44c1c | 825 | |
ea9f10bb TT |
826 | data = NULL; |
827 | if (!bfd_get_full_section_contents (abfd, sectp, &data)) | |
41667530 MG |
828 | { |
829 | warning (_("Can't read data for section '%s' in file '%s'"), | |
fd361982 | 830 | bfd_section_name (sectp), |
41667530 MG |
831 | bfd_get_filename (abfd)); |
832 | /* Set size to 0 to prevent further attempts to read the invalid | |
833 | section. */ | |
834 | *size = 0; | |
cafb3438 | 835 | return NULL; |
41667530 | 836 | } |
ea9f10bb | 837 | descriptor->data = data; |
4bf44c1c TT |
838 | |
839 | done: | |
840 | gdb_assert (descriptor->data != NULL); | |
841 | *size = descriptor->size; | |
9a3c8263 | 842 | return (const gdb_byte *) descriptor->data; |
4bf44c1c | 843 | } |
64c31149 | 844 | |
dccee2de TT |
845 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
846 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
847 | not preserved. */ | |
848 | ||
849 | static int | |
850 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
851 | { | |
df2fc6fb | 852 | uint32_t file_crc = 0; |
dccee2de TT |
853 | |
854 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
855 | { | |
856 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
857 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
858 | return 0; | |
859 | } | |
860 | ||
861 | for (;;) | |
862 | { | |
863 | gdb_byte buffer[8 * 1024]; | |
864 | bfd_size_type count; | |
865 | ||
226f9f4f | 866 | count = bfd_read (buffer, sizeof (buffer), abfd); |
dccee2de TT |
867 | if (count == (bfd_size_type) -1) |
868 | { | |
869 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
870 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
871 | return 0; | |
872 | } | |
873 | if (count == 0) | |
874 | break; | |
875 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
876 | } | |
877 | ||
878 | *file_crc_return = file_crc; | |
879 | return 1; | |
880 | } | |
881 | ||
882 | /* See gdb_bfd.h. */ | |
883 | ||
884 | int | |
885 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
886 | { | |
9a3c8263 | 887 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
dccee2de TT |
888 | |
889 | if (!gdata->crc_computed) | |
890 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
891 | ||
892 | if (gdata->crc_computed) | |
893 | *crc_out = gdata->crc; | |
894 | return gdata->crc_computed; | |
895 | } | |
896 | ||
64c31149 TT |
897 | \f |
898 | ||
899 | /* See gdb_bfd.h. */ | |
900 | ||
192b62ce | 901 | gdb_bfd_ref_ptr |
64c31149 TT |
902 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, |
903 | int fd) | |
904 | { | |
905 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
906 | ||
0ecf4403 TT |
907 | if (result != nullptr) |
908 | bfd_set_cacheable (result, 1); | |
909 | ||
1831a9f9 | 910 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
911 | } |
912 | ||
913 | /* See gdb_bfd.h. */ | |
914 | ||
192b62ce | 915 | gdb_bfd_ref_ptr |
64c31149 TT |
916 | gdb_bfd_openr (const char *filename, const char *target) |
917 | { | |
918 | bfd *result = bfd_openr (filename, target); | |
919 | ||
1831a9f9 | 920 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
921 | } |
922 | ||
923 | /* See gdb_bfd.h. */ | |
924 | ||
192b62ce | 925 | gdb_bfd_ref_ptr |
64c31149 TT |
926 | gdb_bfd_openw (const char *filename, const char *target) |
927 | { | |
928 | bfd *result = bfd_openw (filename, target); | |
929 | ||
1831a9f9 | 930 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
931 | } |
932 | ||
933 | /* See gdb_bfd.h. */ | |
934 | ||
bb75a869 TT |
935 | gdb_bfd_ref_ptr |
936 | gdb_bfd_openr_iovec (const char *filename, const char *target, | |
937 | gdb_iovec_opener_ftype open_fn) | |
938 | { | |
939 | auto do_open = [] (bfd *nbfd, void *closure) -> void * | |
940 | { | |
941 | auto real_opener = static_cast<gdb_iovec_opener_ftype *> (closure); | |
942 | return (*real_opener) (nbfd); | |
943 | }; | |
944 | ||
945 | auto read_trampoline = [] (bfd *nbfd, void *stream, void *buf, | |
946 | file_ptr nbytes, file_ptr offset) -> file_ptr | |
947 | { | |
948 | gdb_bfd_iovec_base *obj = static_cast<gdb_bfd_iovec_base *> (stream); | |
949 | return obj->read (nbfd, buf, nbytes, offset); | |
950 | }; | |
951 | ||
952 | auto stat_trampoline = [] (struct bfd *abfd, void *stream, | |
953 | struct stat *sb) -> int | |
954 | { | |
955 | gdb_bfd_iovec_base *obj = static_cast<gdb_bfd_iovec_base *> (stream); | |
956 | return obj->stat (abfd, sb); | |
957 | }; | |
958 | ||
959 | auto close_trampoline = [] (struct bfd *nbfd, void *stream) -> int | |
960 | { | |
961 | gdb_bfd_iovec_base *obj = static_cast<gdb_bfd_iovec_base *> (stream); | |
962 | delete obj; | |
963 | /* Success. */ | |
964 | return 0; | |
965 | }; | |
966 | ||
967 | bfd *result = bfd_openr_iovec (filename, target, | |
968 | do_open, &open_fn, | |
969 | read_trampoline, close_trampoline, | |
970 | stat_trampoline); | |
971 | ||
972 | return gdb_bfd_ref_ptr::new_reference (result); | |
973 | } | |
974 | ||
975 | /* See gdb_bfd.h. */ | |
976 | ||
0cd61f44 TT |
977 | void |
978 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
979 | { | |
980 | struct gdb_bfd_data *gdata; | |
981 | ||
982 | gdb_bfd_ref (child); | |
983 | /* No need to stash the filename here, because we also keep a | |
984 | reference on the parent archive. */ | |
985 | ||
9a3c8263 | 986 | gdata = (struct gdb_bfd_data *) bfd_usrdata (child); |
0cd61f44 TT |
987 | if (gdata->archive_bfd == NULL) |
988 | { | |
989 | gdata->archive_bfd = parent; | |
990 | gdb_bfd_ref (parent); | |
991 | } | |
992 | else | |
993 | gdb_assert (gdata->archive_bfd == parent); | |
994 | } | |
995 | ||
996 | /* See gdb_bfd.h. */ | |
997 | ||
192b62ce | 998 | gdb_bfd_ref_ptr |
64c31149 TT |
999 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) |
1000 | { | |
1001 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
1002 | ||
1003 | if (result) | |
0cd61f44 | 1004 | gdb_bfd_mark_parent (result, archive); |
64c31149 | 1005 | |
192b62ce | 1006 | return gdb_bfd_ref_ptr (result); |
64c31149 TT |
1007 | } |
1008 | ||
1009 | /* See gdb_bfd.h. */ | |
1010 | ||
13aaf454 DE |
1011 | void |
1012 | gdb_bfd_record_inclusion (bfd *includer, bfd *includee) | |
1013 | { | |
1014 | struct gdb_bfd_data *gdata; | |
1015 | ||
9a3c8263 | 1016 | gdata = (struct gdb_bfd_data *) bfd_usrdata (includer); |
1831a9f9 | 1017 | gdata->included_bfds.push_back (gdb_bfd_ref_ptr::new_reference (includee)); |
13aaf454 DE |
1018 | } |
1019 | ||
d6b28940 TT |
1020 | \f |
1021 | ||
69f6730d | 1022 | static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
65cf3563 TT |
1023 | |
1024 | /* See gdb_bfd.h. */ | |
1025 | ||
1026 | int | |
1027 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
1028 | { | |
1029 | if (section == NULL) | |
1030 | return -1; | |
1031 | else if (section == bfd_com_section_ptr) | |
ce9c0ca1 | 1032 | return bfd_count_sections (abfd); |
65cf3563 | 1033 | else if (section == bfd_und_section_ptr) |
ce9c0ca1 | 1034 | return bfd_count_sections (abfd) + 1; |
65cf3563 | 1035 | else if (section == bfd_abs_section_ptr) |
ce9c0ca1 | 1036 | return bfd_count_sections (abfd) + 2; |
65cf3563 | 1037 | else if (section == bfd_ind_section_ptr) |
ce9c0ca1 | 1038 | return bfd_count_sections (abfd) + 3; |
65cf3563 TT |
1039 | return section->index; |
1040 | } | |
1041 | ||
1042 | /* See gdb_bfd.h. */ | |
1043 | ||
1044 | int | |
1045 | gdb_bfd_count_sections (bfd *abfd) | |
1046 | { | |
1047 | return bfd_count_sections (abfd) + 4; | |
1048 | } | |
1049 | ||
1da77581 TT |
1050 | /* See gdb_bfd.h. */ |
1051 | ||
1052 | int | |
1053 | gdb_bfd_requires_relocations (bfd *abfd) | |
1054 | { | |
9a3c8263 | 1055 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
1da77581 TT |
1056 | |
1057 | if (gdata->relocation_computed == 0) | |
1058 | { | |
1059 | asection *sect; | |
1060 | ||
1061 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1062 | if ((sect->flags & SEC_RELOC) != 0) | |
1063 | { | |
1064 | gdata->needs_relocations = 1; | |
1065 | break; | |
1066 | } | |
1067 | ||
1068 | gdata->relocation_computed = 1; | |
1069 | } | |
1070 | ||
1071 | return gdata->needs_relocations; | |
1072 | } | |
1073 | ||
e0fc5c3f SM |
1074 | /* See gdb_bfd.h. */ |
1075 | ||
1076 | bool | |
1077 | gdb_bfd_get_full_section_contents (bfd *abfd, asection *section, | |
1078 | gdb::byte_vector *contents) | |
1079 | { | |
1080 | bfd_size_type section_size = bfd_section_size (section); | |
1081 | ||
1082 | contents->resize (section_size); | |
1083 | ||
1084 | return bfd_get_section_contents (abfd, section, contents->data (), 0, | |
1085 | section_size); | |
1086 | } | |
65cf3563 | 1087 | |
34b965f7 TT |
1088 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" |
1089 | #define AMBIGUOUS_MESS2 \ | |
1090 | ".\nUse \"set gnutarget format-name\" to specify the format." | |
1091 | ||
1092 | /* See gdb_bfd.h. */ | |
1093 | ||
1094 | std::string | |
1095 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) | |
1096 | { | |
1097 | char **p; | |
1098 | ||
1099 | /* Check if errmsg just need simple return. */ | |
1100 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) | |
1101 | return bfd_errmsg (error_tag); | |
1102 | ||
1103 | std::string ret (bfd_errmsg (error_tag)); | |
1104 | ret += AMBIGUOUS_MESS1; | |
1105 | ||
1106 | for (p = matching; *p; p++) | |
1107 | { | |
1108 | ret += " "; | |
1109 | ret += *p; | |
1110 | } | |
1111 | ret += AMBIGUOUS_MESS2; | |
1112 | ||
1113 | xfree (matching); | |
1114 | ||
1115 | return ret; | |
1116 | } | |
1117 | ||
d6b28940 TT |
1118 | /* A callback for htab_traverse that prints a single BFD. */ |
1119 | ||
1120 | static int | |
1121 | print_one_bfd (void **slot, void *data) | |
1122 | { | |
9a3c8263 SM |
1123 | bfd *abfd = (struct bfd *) *slot; |
1124 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
1125 | struct ui_out *uiout = (struct ui_out *) data; | |
d6b28940 | 1126 | |
2e783024 | 1127 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
381befee | 1128 | uiout->field_signed ("refcount", gdata->refc); |
112e8700 | 1129 | uiout->field_string ("addr", host_address_to_string (abfd)); |
972f7a4b TT |
1130 | uiout->field_string ("filename", bfd_get_filename (abfd), |
1131 | file_name_style.style ()); | |
112e8700 | 1132 | uiout->text ("\n"); |
d6b28940 TT |
1133 | |
1134 | return 1; | |
1135 | } | |
1136 | ||
1137 | /* Implement the 'maint info bfd' command. */ | |
1138 | ||
1139 | static void | |
e4e33335 | 1140 | maintenance_info_bfds (const char *arg, int from_tty) |
d6b28940 | 1141 | { |
d6b28940 TT |
1142 | struct ui_out *uiout = current_uiout; |
1143 | ||
4a2b031d | 1144 | ui_out_emit_table table_emitter (uiout, 3, -1, "bfds"); |
112e8700 SM |
1145 | uiout->table_header (10, ui_left, "refcount", "Refcount"); |
1146 | uiout->table_header (18, ui_left, "addr", "Address"); | |
1147 | uiout->table_header (40, ui_left, "filename", "Filename"); | |
d6b28940 | 1148 | |
112e8700 | 1149 | uiout->table_body (); |
d6b28940 | 1150 | htab_traverse (all_bfds, print_one_bfd, uiout); |
d6b28940 TT |
1151 | } |
1152 | ||
84e60555 KB |
1153 | /* BFD related per-inferior data. */ |
1154 | ||
1155 | struct bfd_inferior_data | |
1156 | { | |
1157 | std::unordered_map<std::string, unsigned long> bfd_error_string_counts; | |
1158 | }; | |
1159 | ||
1160 | /* Per-inferior data key. */ | |
1161 | ||
1162 | static const registry<inferior>::key<bfd_inferior_data> bfd_inferior_data_key; | |
1163 | ||
1164 | /* Fetch per-inferior BFD data. It always returns a valid pointer to | |
1165 | a bfd_inferior_data struct. */ | |
1166 | ||
1167 | static struct bfd_inferior_data * | |
1168 | get_bfd_inferior_data (struct inferior *inf) | |
1169 | { | |
1170 | struct bfd_inferior_data *data; | |
1171 | ||
1172 | data = bfd_inferior_data_key.get (inf); | |
1173 | if (data == nullptr) | |
1174 | data = bfd_inferior_data_key.emplace (inf); | |
1175 | ||
1176 | return data; | |
1177 | } | |
1178 | ||
1179 | /* Increment the BFD error count for STR and return the updated | |
1180 | count. */ | |
1181 | ||
1182 | static unsigned long | |
e8cd90f0 | 1183 | increment_bfd_error_count (const std::string &str) |
84e60555 | 1184 | { |
e8cd90f0 TT |
1185 | #if CXX_STD_THREAD |
1186 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
1187 | #endif | |
84e60555 KB |
1188 | struct bfd_inferior_data *bid = get_bfd_inferior_data (current_inferior ()); |
1189 | ||
1190 | auto &map = bid->bfd_error_string_counts; | |
e8cd90f0 | 1191 | return ++map[str]; |
84e60555 KB |
1192 | } |
1193 | ||
e8cd90f0 TT |
1194 | /* A print callback for bfd_print_error. */ |
1195 | ||
5cb1d84e | 1196 | static int ATTRIBUTE_PRINTF (2, 0) |
e8cd90f0 TT |
1197 | print_error_callback (void *stream, const char *fmt, ...) |
1198 | { | |
1199 | string_file *file = (string_file *) stream; | |
1200 | size_t in_size = file->size (); | |
1201 | va_list ap; | |
1202 | va_start (ap, fmt); | |
1203 | file->vprintf (fmt, ap); | |
1204 | va_end (ap); | |
1205 | return file->size () - in_size; | |
1206 | } | |
84e60555 KB |
1207 | |
1208 | /* Define a BFD error handler which will suppress the printing of | |
1209 | messages which have been printed once already. This is done on a | |
1210 | per-inferior basis. */ | |
1211 | ||
5cb1d84e | 1212 | static void |
84e60555 KB |
1213 | gdb_bfd_error_handler (const char *fmt, va_list ap) |
1214 | { | |
e8cd90f0 TT |
1215 | string_file output; |
1216 | bfd_print_error (print_error_callback, &output, fmt, ap); | |
1217 | std::string str = output.release (); | |
84e60555 | 1218 | |
e8cd90f0 | 1219 | if (increment_bfd_error_count (str) > 1) |
84e60555 KB |
1220 | return; |
1221 | ||
e8cd90f0 | 1222 | warning ("%s", str.c_str ()); |
84e60555 KB |
1223 | } |
1224 | ||
da0e2ac4 TT |
1225 | /* See gdb_bfd.h. */ |
1226 | ||
1227 | void | |
1228 | gdb_bfd_init () | |
1229 | { | |
1230 | if (bfd_init () == BFD_INIT_MAGIC) | |
1231 | { | |
1232 | #if CXX_STD_THREAD | |
1233 | if (bfd_thread_init (gdb_bfd_lock, gdb_bfd_unlock, nullptr)) | |
1234 | #endif | |
1235 | return; | |
1236 | } | |
1237 | ||
1238 | error (_("fatal error: libbfd ABI mismatch")); | |
1239 | } | |
1240 | ||
6c265988 | 1241 | void _initialize_gdb_bfd (); |
d6b28940 | 1242 | void |
6c265988 | 1243 | _initialize_gdb_bfd () |
d6b28940 TT |
1244 | { |
1245 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
1246 | NULL, xcalloc, xfree); | |
1247 | ||
1248 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
1249 | List the BFDs that are currently open."), | |
1250 | &maintenanceinfolist); | |
18989b3c AB |
1251 | |
1252 | add_setshow_boolean_cmd ("bfd-sharing", no_class, | |
1253 | &bfd_sharing, _("\ | |
1254 | Set whether gdb will share bfds that appear to be the same file."), _("\ | |
1255 | Show whether gdb will share bfds that appear to be the same file."), _("\ | |
1256 | When enabled gdb will reuse existing bfds rather than reopening the\n\ | |
1257 | same file. To decide if two files are the same then gdb compares the\n\ | |
1258 | filename, file size, file modification time, and file inode."), | |
1259 | NULL, | |
1260 | &show_bfd_sharing, | |
1261 | &maintenance_set_cmdlist, | |
1262 | &maintenance_show_cmdlist); | |
566f5e3b | 1263 | |
d4dd4fca SM |
1264 | add_setshow_boolean_cmd ("bfd-cache", class_maintenance, |
1265 | &debug_bfd_cache, | |
1266 | _("Set bfd cache debugging."), | |
1267 | _("Show bfd cache debugging."), | |
1268 | _("\ | |
566f5e3b | 1269 | When non-zero, bfd cache specific debugging is enabled."), |
d4dd4fca SM |
1270 | NULL, |
1271 | &show_bfd_cache_debug, | |
1272 | &setdebuglist, &showdebuglist); | |
84e60555 KB |
1273 | |
1274 | /* Hook the BFD error/warning handler to limit amount of output. */ | |
e8cd90f0 | 1275 | bfd_set_error_handler (gdb_bfd_error_handler); |
d6b28940 | 1276 | } |