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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" |
d6b28940 TT |
21 | #include "ui-out.h" |
22 | #include "gdbcmd.h" | |
6ec53d05 | 23 | #include "hashtab.h" |
268a13a5 | 24 | #include "gdbsupport/filestuff.h" |
4bf44c1c TT |
25 | #ifdef HAVE_MMAP |
26 | #include <sys/mman.h> | |
27 | #ifndef MAP_FAILED | |
28 | #define MAP_FAILED ((void *) -1) | |
29 | #endif | |
30 | #endif | |
f08e97fe | 31 | #include "target.h" |
198f946f | 32 | #include "gdbsupport/fileio.h" |
07c138c8 | 33 | #include "inferior.h" |
972f7a4b | 34 | #include "cli/cli-style.h" |
84e60555 | 35 | #include <unordered_map> |
4bf44c1c | 36 | |
da0e2ac4 TT |
37 | #if CXX_STD_THREAD |
38 | ||
39 | #include <mutex> | |
40 | ||
41 | /* Lock held when doing BFD operations. A recursive mutex is used | |
42 | because we use this mutex internally and also for BFD, just to make | |
43 | life a bit simpler, and we may sometimes hold it while calling into | |
44 | BFD. */ | |
45 | static std::recursive_mutex gdb_bfd_mutex; | |
46 | ||
47 | /* BFD locking function. */ | |
48 | ||
49 | static bool | |
50 | gdb_bfd_lock (void *ignore) | |
51 | { | |
52 | gdb_bfd_mutex.lock (); | |
53 | return true; | |
54 | } | |
55 | ||
56 | /* BFD unlocking function. */ | |
57 | ||
58 | static bool | |
59 | gdb_bfd_unlock (void *ignore) | |
60 | { | |
61 | gdb_bfd_mutex.unlock (); | |
62 | return true; | |
63 | } | |
64 | ||
65 | #endif /* CXX_STD_THREAD */ | |
66 | ||
4bf44c1c TT |
67 | /* An object of this type is stored in the section's user data when |
68 | mapping a section. */ | |
69 | ||
70 | struct gdb_bfd_section_data | |
71 | { | |
72 | /* Size of the data. */ | |
033679b1 | 73 | size_t size; |
4bf44c1c | 74 | /* If the data was mmapped, this is the length of the map. */ |
033679b1 | 75 | size_t map_len; |
4bf44c1c TT |
76 | /* The data. If NULL, the section data has not been read. */ |
77 | void *data; | |
78 | /* If the data was mmapped, this is the map address. */ | |
79 | void *map_addr; | |
80 | }; | |
a4453b7e | 81 | |
d6b28940 TT |
82 | /* A hash table holding every BFD that gdb knows about. This is not |
83 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
84 | BFDs; in contrast, this hash is used just to implement | |
85 | "maint info bfd". */ | |
86 | ||
87 | static htab_t all_bfds; | |
88 | ||
6ec53d05 TT |
89 | /* An object of this type is stored in each BFD's user data. */ |
90 | ||
91 | struct gdb_bfd_data | |
92 | { | |
3cae4447 TT |
93 | /* Note that if ST is nullptr, then we simply fill in zeroes. */ |
94 | gdb_bfd_data (bfd *abfd, struct stat *st) | |
95 | : mtime (st == nullptr ? 0 : st->st_mtime), | |
96 | size (st == nullptr ? 0 : st->st_size), | |
97 | inode (st == nullptr ? 0 : st->st_ino), | |
98 | device_id (st == nullptr ? 0 : st->st_dev), | |
06d5bbc8 TT |
99 | relocation_computed (0), |
100 | needs_relocations (0), | |
101 | crc_computed (0) | |
102 | { | |
06d5bbc8 TT |
103 | } |
104 | ||
105 | ~gdb_bfd_data () | |
106 | { | |
06d5bbc8 TT |
107 | } |
108 | ||
6ec53d05 | 109 | /* The reference count. */ |
06d5bbc8 | 110 | int refc = 1; |
6ec53d05 TT |
111 | |
112 | /* The mtime of the BFD at the point the cache entry was made. */ | |
113 | time_t mtime; | |
b82d08cd | 114 | |
c04fe68f AB |
115 | /* The file size (in bytes) at the point the cache entry was made. */ |
116 | off_t size; | |
117 | ||
118 | /* The inode of the file at the point the cache entry was made. */ | |
119 | ino_t inode; | |
120 | ||
121 | /* The device id of the file at the point the cache entry was made. */ | |
122 | dev_t device_id; | |
123 | ||
1da77581 TT |
124 | /* This is true if we have determined whether this BFD has any |
125 | sections requiring relocation. */ | |
126 | unsigned int relocation_computed : 1; | |
127 | ||
128 | /* This is true if any section needs relocation. */ | |
129 | unsigned int needs_relocations : 1; | |
130 | ||
dccee2de TT |
131 | /* This is true if we have successfully computed the file's CRC. */ |
132 | unsigned int crc_computed : 1; | |
133 | ||
134 | /* The file's CRC. */ | |
06d5bbc8 | 135 | unsigned long crc = 0; |
dccee2de | 136 | |
b82d08cd TT |
137 | /* If the BFD comes from an archive, this points to the archive's |
138 | BFD. Otherwise, this is NULL. */ | |
06d5bbc8 | 139 | bfd *archive_bfd = nullptr; |
e992eda4 | 140 | |
13aaf454 | 141 | /* Table of all the bfds this bfd has included. */ |
d5833c62 | 142 | std::vector<gdb_bfd_ref_ptr> included_bfds; |
13aaf454 | 143 | |
e992eda4 | 144 | /* The registry. */ |
08b8a139 | 145 | registry<bfd> registry_fields; |
6ec53d05 TT |
146 | }; |
147 | ||
08b8a139 TT |
148 | registry<bfd> * |
149 | registry_accessor<bfd>::get (bfd *abfd) | |
150 | { | |
151 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
152 | return &gdata->registry_fields; | |
153 | } | |
e992eda4 | 154 | |
6ec53d05 TT |
155 | /* A hash table storing all the BFDs maintained in the cache. */ |
156 | ||
157 | static htab_t gdb_bfd_cache; | |
158 | ||
18989b3c AB |
159 | /* When true gdb will reuse an existing bfd object if the filename, |
160 | modification time, and file size all match. */ | |
161 | ||
491144b5 | 162 | static bool bfd_sharing = true; |
18989b3c AB |
163 | static void |
164 | show_bfd_sharing (struct ui_file *file, int from_tty, | |
165 | struct cmd_list_element *c, const char *value) | |
166 | { | |
6cb06a8c | 167 | gdb_printf (file, _("BFD sharing is %s.\n"), value); |
18989b3c AB |
168 | } |
169 | ||
d4dd4fca SM |
170 | /* When true debugging of the bfd caches is enabled. */ |
171 | ||
172 | static bool debug_bfd_cache; | |
566f5e3b | 173 | |
1e15fcac SM |
174 | /* Print an "bfd-cache" debug statement. */ |
175 | ||
176 | #define bfd_cache_debug_printf(fmt, ...) \ | |
177 | debug_prefixed_printf_cond (debug_bfd_cache, "bfd-cache", fmt, ##__VA_ARGS__) | |
178 | ||
566f5e3b AB |
179 | static void |
180 | show_bfd_cache_debug (struct ui_file *file, int from_tty, | |
181 | struct cmd_list_element *c, const char *value) | |
182 | { | |
6cb06a8c | 183 | gdb_printf (file, _("BFD cache debugging is %s.\n"), value); |
566f5e3b AB |
184 | } |
185 | ||
6ec53d05 TT |
186 | /* The type of an object being looked up in gdb_bfd_cache. We use |
187 | htab's capability of storing one kind of object (BFD in this case) | |
188 | and using a different sort of object for searching. */ | |
189 | ||
190 | struct gdb_bfd_cache_search | |
191 | { | |
192 | /* The filename. */ | |
193 | const char *filename; | |
194 | /* The mtime. */ | |
195 | time_t mtime; | |
c04fe68f AB |
196 | /* The file size (in bytes). */ |
197 | off_t size; | |
198 | /* The inode of the file. */ | |
199 | ino_t inode; | |
200 | /* The device id of the file. */ | |
201 | dev_t device_id; | |
6ec53d05 TT |
202 | }; |
203 | ||
204 | /* A hash function for BFDs. */ | |
205 | ||
206 | static hashval_t | |
207 | hash_bfd (const void *b) | |
208 | { | |
9a3c8263 | 209 | const bfd *abfd = (const struct bfd *) b; |
6ec53d05 TT |
210 | |
211 | /* It is simplest to just hash the filename. */ | |
212 | return htab_hash_string (bfd_get_filename (abfd)); | |
213 | } | |
214 | ||
215 | /* An equality function for BFDs. Note that this expects the caller | |
216 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
217 | ||
218 | static int | |
219 | eq_bfd (const void *a, const void *b) | |
220 | { | |
9a3c8263 SM |
221 | const bfd *abfd = (const struct bfd *) a; |
222 | const struct gdb_bfd_cache_search *s | |
223 | = (const struct gdb_bfd_cache_search *) b; | |
224 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
6ec53d05 TT |
225 | |
226 | return (gdata->mtime == s->mtime | |
c04fe68f AB |
227 | && gdata->size == s->size |
228 | && gdata->inode == s->inode | |
229 | && gdata->device_id == s->device_id | |
6ec53d05 TT |
230 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); |
231 | } | |
232 | ||
233 | /* See gdb_bfd.h. */ | |
234 | ||
f08e97fe GB |
235 | int |
236 | is_target_filename (const char *name) | |
237 | { | |
238 | return startswith (name, TARGET_SYSROOT_PREFIX); | |
239 | } | |
240 | ||
241 | /* See gdb_bfd.h. */ | |
242 | ||
243 | int | |
244 | gdb_bfd_has_target_filename (struct bfd *abfd) | |
245 | { | |
246 | return is_target_filename (bfd_get_filename (abfd)); | |
247 | } | |
248 | ||
66984afd AB |
249 | /* For `gdb_bfd_open_from_target_memory`. An object that manages the |
250 | details of a BFD in target memory. */ | |
15cc148f | 251 | |
4d2edefa | 252 | struct target_buffer : public gdb_bfd_iovec_base |
15cc148f | 253 | { |
66984afd AB |
254 | /* Constructor. BASE and SIZE define where the BFD can be found in |
255 | target memory. */ | |
256 | target_buffer (CORE_ADDR base, ULONGEST size) | |
257 | : m_base (base), | |
5153027c | 258 | m_size (size), |
c96ceed9 MM |
259 | m_filename (xstrprintf ("<in-memory@%s-%s>", |
260 | core_addr_to_string_nz (m_base), | |
261 | core_addr_to_string_nz (m_base + m_size))) | |
66984afd | 262 | { |
66984afd AB |
263 | } |
264 | ||
265 | /* Return the size of the in-memory BFD file. */ | |
266 | ULONGEST size () const | |
267 | { return m_size; } | |
268 | ||
269 | /* Return the base address of the in-memory BFD file. */ | |
270 | CORE_ADDR base () const | |
271 | { return m_base; } | |
272 | ||
273 | /* Return a generated filename for the in-memory BFD file. The generated | |
c96ceed9 | 274 | name will include the begin and end address of the in-memory file. */ |
66984afd AB |
275 | const char *filename () const |
276 | { return m_filename.get (); } | |
277 | ||
4d2edefa TT |
278 | file_ptr read (bfd *abfd, void *buffer, file_ptr nbytes, |
279 | file_ptr offset) override; | |
280 | ||
281 | int stat (struct bfd *abfd, struct stat *sb) override; | |
282 | ||
66984afd AB |
283 | private: |
284 | /* The base address of the in-memory BFD file. */ | |
285 | CORE_ADDR m_base; | |
286 | ||
287 | /* The size (in-bytes) of the in-memory BFD file. */ | |
288 | ULONGEST m_size; | |
289 | ||
290 | /* Holds the generated name of the in-memory BFD file. */ | |
291 | gdb::unique_xmalloc_ptr<char> m_filename; | |
15cc148f MS |
292 | }; |
293 | ||
15cc148f MS |
294 | /* For `gdb_bfd_open_from_target_memory`. For reading the file, we just need to |
295 | pass through to target_read_memory and fix up the arguments and return | |
296 | values. */ | |
297 | ||
4d2edefa TT |
298 | file_ptr |
299 | target_buffer::read (struct bfd *abfd, void *buf, | |
15cc148f MS |
300 | file_ptr nbytes, file_ptr offset) |
301 | { | |
15cc148f | 302 | /* If this read will read all of the file, limit it to just the rest. */ |
4d2edefa TT |
303 | if (offset + nbytes > size ()) |
304 | nbytes = size () - offset; | |
15cc148f MS |
305 | |
306 | /* If there are no more bytes left, we've reached EOF. */ | |
307 | if (nbytes == 0) | |
308 | return 0; | |
309 | ||
4d2edefa | 310 | int err = target_read_memory (base () + offset, (gdb_byte *) buf, nbytes); |
15cc148f MS |
311 | if (err) |
312 | return -1; | |
313 | ||
314 | return nbytes; | |
315 | } | |
316 | ||
317 | /* For `gdb_bfd_open_from_target_memory`. For statting the file, we only | |
318 | support the st_size attribute. */ | |
319 | ||
4d2edefa TT |
320 | int |
321 | target_buffer::stat (struct bfd *abfd, struct stat *sb) | |
15cc148f | 322 | { |
15cc148f | 323 | memset (sb, 0, sizeof (struct stat)); |
4d2edefa | 324 | sb->st_size = size (); |
15cc148f MS |
325 | return 0; |
326 | } | |
327 | ||
328 | /* See gdb_bfd.h. */ | |
329 | ||
330 | gdb_bfd_ref_ptr | |
331 | gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, | |
322dd71c | 332 | const char *target) |
15cc148f | 333 | { |
4d2edefa | 334 | std::unique_ptr<target_buffer> buffer |
6b62451a | 335 | = std::make_unique<target_buffer> (addr, size); |
15cc148f | 336 | |
66984afd | 337 | return gdb_bfd_openr_iovec (buffer->filename (), target, |
4d2edefa TT |
338 | [&] (bfd *nbfd) |
339 | { | |
340 | return buffer.release (); | |
341 | }); | |
15cc148f | 342 | } |
f08e97fe | 343 | |
dcc04527 TT |
344 | /* An object that manages the underlying stream for a BFD, using |
345 | target file I/O. */ | |
346 | ||
347 | struct target_fileio_stream : public gdb_bfd_iovec_base | |
98c59b52 | 348 | { |
dcc04527 TT |
349 | target_fileio_stream (bfd *nbfd, int fd) |
350 | : m_bfd (nbfd), | |
351 | m_fd (fd) | |
352 | { | |
353 | } | |
354 | ||
355 | ~target_fileio_stream (); | |
356 | ||
357 | file_ptr read (bfd *abfd, void *buffer, file_ptr nbytes, | |
358 | file_ptr offset) override; | |
359 | ||
360 | int stat (struct bfd *abfd, struct stat *sb) override; | |
361 | ||
362 | private: | |
363 | ||
364 | /* The BFD. Saved for the destructor. */ | |
365 | bfd *m_bfd; | |
366 | ||
367 | /* The file descriptor. */ | |
368 | int m_fd; | |
98c59b52 PA |
369 | }; |
370 | ||
dcc04527 TT |
371 | /* Wrapper for target_fileio_open suitable for use as a helper |
372 | function for gdb_bfd_openr_iovec. */ | |
f08e97fe | 373 | |
dcc04527 TT |
374 | static target_fileio_stream * |
375 | gdb_bfd_iovec_fileio_open (struct bfd *abfd, inferior *inf, bool warn_if_slow) | |
f08e97fe GB |
376 | { |
377 | const char *filename = bfd_get_filename (abfd); | |
b872057a SM |
378 | int fd; |
379 | fileio_error target_errno; | |
f08e97fe GB |
380 | |
381 | gdb_assert (is_target_filename (filename)); | |
382 | ||
dcc04527 | 383 | fd = target_fileio_open (inf, |
4111f652 | 384 | filename + strlen (TARGET_SYSROOT_PREFIX), |
dcc04527 | 385 | FILEIO_O_RDONLY, 0, warn_if_slow, |
4111f652 | 386 | &target_errno); |
f08e97fe GB |
387 | if (fd == -1) |
388 | { | |
517a63c2 | 389 | errno = fileio_error_to_host (target_errno); |
f08e97fe GB |
390 | bfd_set_error (bfd_error_system_call); |
391 | return NULL; | |
392 | } | |
393 | ||
dcc04527 | 394 | return new target_fileio_stream (abfd, fd); |
f08e97fe GB |
395 | } |
396 | ||
dcc04527 | 397 | /* Wrapper for target_fileio_pread. */ |
f08e97fe | 398 | |
dcc04527 TT |
399 | file_ptr |
400 | target_fileio_stream::read (struct bfd *abfd, void *buf, | |
f08e97fe GB |
401 | file_ptr nbytes, file_ptr offset) |
402 | { | |
b872057a | 403 | fileio_error target_errno; |
f08e97fe GB |
404 | file_ptr pos, bytes; |
405 | ||
406 | pos = 0; | |
407 | while (nbytes > pos) | |
408 | { | |
2d7711a3 GB |
409 | QUIT; |
410 | ||
dcc04527 | 411 | bytes = target_fileio_pread (m_fd, (gdb_byte *) buf + pos, |
f08e97fe GB |
412 | nbytes - pos, offset + pos, |
413 | &target_errno); | |
414 | if (bytes == 0) | |
dda83cd7 SM |
415 | /* Success, but no bytes, means end-of-file. */ |
416 | break; | |
f08e97fe GB |
417 | if (bytes == -1) |
418 | { | |
517a63c2 | 419 | errno = fileio_error_to_host (target_errno); |
f08e97fe GB |
420 | bfd_set_error (bfd_error_system_call); |
421 | return -1; | |
422 | } | |
423 | ||
424 | pos += bytes; | |
425 | } | |
426 | ||
427 | return pos; | |
428 | } | |
429 | ||
3a76f8f4 PA |
430 | /* Warn that it wasn't possible to close a bfd for file NAME, because |
431 | of REASON. */ | |
432 | ||
433 | static void | |
434 | gdb_bfd_close_warning (const char *name, const char *reason) | |
435 | { | |
436 | warning (_("cannot close \"%s\": %s"), name, reason); | |
437 | } | |
438 | ||
dcc04527 | 439 | /* Wrapper for target_fileio_close. */ |
f08e97fe | 440 | |
dcc04527 | 441 | target_fileio_stream::~target_fileio_stream () |
f08e97fe | 442 | { |
b872057a | 443 | fileio_error target_errno; |
f08e97fe | 444 | |
f08e97fe GB |
445 | /* Ignore errors on close. These may happen with remote |
446 | targets if the connection has already been torn down. */ | |
3a76f8f4 PA |
447 | try |
448 | { | |
dcc04527 | 449 | target_fileio_close (m_fd, &target_errno); |
3a76f8f4 PA |
450 | } |
451 | catch (const gdb_exception &ex) | |
452 | { | |
453 | /* Also avoid crossing exceptions over bfd. */ | |
dcc04527 | 454 | gdb_bfd_close_warning (bfd_get_filename (m_bfd), |
3a76f8f4 PA |
455 | ex.message->c_str ()); |
456 | } | |
f08e97fe GB |
457 | } |
458 | ||
dcc04527 | 459 | /* Wrapper for target_fileio_fstat. */ |
f08e97fe | 460 | |
dcc04527 TT |
461 | int |
462 | target_fileio_stream::stat (struct bfd *abfd, struct stat *sb) | |
f08e97fe | 463 | { |
b872057a | 464 | fileio_error target_errno; |
f08e97fe GB |
465 | int result; |
466 | ||
dcc04527 | 467 | result = target_fileio_fstat (m_fd, sb, &target_errno); |
f08e97fe GB |
468 | if (result == -1) |
469 | { | |
517a63c2 | 470 | errno = fileio_error_to_host (target_errno); |
f08e97fe GB |
471 | bfd_set_error (bfd_error_system_call); |
472 | } | |
473 | ||
474 | return result; | |
475 | } | |
476 | ||
3cae4447 TT |
477 | /* A helper function to initialize the data that gdb attaches to each |
478 | BFD. */ | |
479 | ||
480 | static void | |
481 | gdb_bfd_init_data (struct bfd *abfd, struct stat *st) | |
482 | { | |
483 | struct gdb_bfd_data *gdata; | |
484 | void **slot; | |
485 | ||
486 | gdb_assert (bfd_usrdata (abfd) == nullptr); | |
487 | ||
488 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ | |
489 | abfd->flags |= BFD_DECOMPRESS; | |
490 | ||
491 | gdata = new gdb_bfd_data (abfd, st); | |
492 | bfd_set_usrdata (abfd, gdata); | |
3cae4447 TT |
493 | |
494 | /* This is the first we've seen it, so add it to the hash table. */ | |
495 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
496 | gdb_assert (slot && !*slot); | |
497 | *slot = abfd; | |
498 | } | |
499 | ||
f08e97fe GB |
500 | /* See gdb_bfd.h. */ |
501 | ||
192b62ce | 502 | gdb_bfd_ref_ptr |
98c59b52 PA |
503 | gdb_bfd_open (const char *name, const char *target, int fd, |
504 | bool warn_if_slow) | |
6ec53d05 TT |
505 | { |
506 | hashval_t hash; | |
507 | void **slot; | |
508 | bfd *abfd; | |
509 | struct gdb_bfd_cache_search search; | |
510 | struct stat st; | |
511 | ||
f08e97fe GB |
512 | if (is_target_filename (name)) |
513 | { | |
514 | if (!target_filesystem_is_local ()) | |
515 | { | |
516 | gdb_assert (fd == -1); | |
517 | ||
dcc04527 TT |
518 | auto open = [&] (bfd *nbfd) -> gdb_bfd_iovec_base * |
519 | { | |
520 | return gdb_bfd_iovec_fileio_open (nbfd, current_inferior (), | |
521 | warn_if_slow); | |
522 | }; | |
523 | ||
524 | return gdb_bfd_openr_iovec (name, target, open); | |
f08e97fe GB |
525 | } |
526 | ||
527 | name += strlen (TARGET_SYSROOT_PREFIX); | |
528 | } | |
529 | ||
da0e2ac4 TT |
530 | #if CXX_STD_THREAD |
531 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
532 | #endif | |
533 | ||
6ec53d05 TT |
534 | if (gdb_bfd_cache == NULL) |
535 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
536 | xcalloc, xfree); | |
537 | ||
538 | if (fd == -1) | |
539 | { | |
13084383 | 540 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0).release (); |
6ec53d05 TT |
541 | if (fd == -1) |
542 | { | |
543 | bfd_set_error (bfd_error_system_call); | |
544 | return NULL; | |
545 | } | |
546 | } | |
547 | ||
6ec53d05 TT |
548 | if (fstat (fd, &st) < 0) |
549 | { | |
3cae4447 | 550 | /* Weird situation here -- don't cache if we can't stat. */ |
1e15fcac | 551 | bfd_cache_debug_printf ("Could not stat %s - not caching", name); |
03b0a45f TT |
552 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); |
553 | if (abfd == nullptr) | |
554 | return nullptr; | |
3cae4447 | 555 | return gdb_bfd_ref_ptr::new_reference (abfd); |
c04fe68f | 556 | } |
6ec53d05 | 557 | |
3cae4447 TT |
558 | search.filename = name; |
559 | search.mtime = st.st_mtime; | |
560 | search.size = st.st_size; | |
561 | search.inode = st.st_ino; | |
562 | search.device_id = st.st_dev; | |
563 | ||
6ec53d05 TT |
564 | /* Note that this must compute the same result as hash_bfd. */ |
565 | hash = htab_hash_string (name); | |
566 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
567 | opening the BFD may fail; and this would violate hashtab | |
568 | invariants. */ | |
9a3c8263 | 569 | abfd = (struct bfd *) htab_find_with_hash (gdb_bfd_cache, &search, hash); |
18989b3c | 570 | if (bfd_sharing && abfd != NULL) |
6ec53d05 | 571 | { |
1e15fcac SM |
572 | bfd_cache_debug_printf ("Reusing cached bfd %s for %s", |
573 | host_address_to_string (abfd), | |
574 | bfd_get_filename (abfd)); | |
6ec53d05 | 575 | close (fd); |
1831a9f9 | 576 | return gdb_bfd_ref_ptr::new_reference (abfd); |
6ec53d05 TT |
577 | } |
578 | ||
579 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
580 | if (abfd == NULL) | |
581 | return NULL; | |
582 | ||
0ecf4403 TT |
583 | bfd_set_cacheable (abfd, 1); |
584 | ||
1e15fcac SM |
585 | bfd_cache_debug_printf ("Creating new bfd %s for %s", |
586 | host_address_to_string (abfd), | |
587 | bfd_get_filename (abfd)); | |
566f5e3b | 588 | |
18989b3c AB |
589 | if (bfd_sharing) |
590 | { | |
591 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
592 | gdb_assert (!*slot); | |
593 | *slot = abfd; | |
594 | } | |
6ec53d05 | 595 | |
3cae4447 TT |
596 | /* It's important to pass the already-computed stat info here, |
597 | rather than, say, calling gdb_bfd_ref_ptr::new_reference. BFD by | |
598 | default will "stat" the file each time bfd_get_mtime is called -- | |
599 | and since we already entered it into the hash table using this | |
600 | mtime, if the file changed at the wrong moment, the race would | |
601 | lead to a hash table corruption. */ | |
602 | gdb_bfd_init_data (abfd, &st); | |
603 | return gdb_bfd_ref_ptr (abfd); | |
6ec53d05 TT |
604 | } |
605 | ||
4bf44c1c TT |
606 | /* A helper function that releases any section data attached to the |
607 | BFD. */ | |
608 | ||
609 | static void | |
1ce51eb5 | 610 | free_one_bfd_section (asection *sectp) |
4bf44c1c | 611 | { |
9a3c8263 | 612 | struct gdb_bfd_section_data *sect |
fd361982 | 613 | = (struct gdb_bfd_section_data *) bfd_section_userdata (sectp); |
4bf44c1c TT |
614 | |
615 | if (sect != NULL && sect->data != NULL) | |
616 | { | |
617 | #ifdef HAVE_MMAP | |
618 | if (sect->map_addr != NULL) | |
619 | { | |
620 | int res; | |
621 | ||
622 | res = munmap (sect->map_addr, sect->map_len); | |
623 | gdb_assert (res == 0); | |
624 | } | |
625 | else | |
626 | #endif | |
627 | xfree (sect->data); | |
628 | } | |
629 | } | |
630 | ||
cbb099e8 TT |
631 | /* Close ABFD, and warn if that fails. */ |
632 | ||
633 | static int | |
634 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
635 | { | |
636 | int ret; | |
b16c44de | 637 | const char *name = bfd_get_filename (abfd); |
cbb099e8 | 638 | |
1ce51eb5 TT |
639 | for (asection *sect : gdb_bfd_sections (abfd)) |
640 | free_one_bfd_section (sect); | |
4bf44c1c | 641 | |
cbb099e8 TT |
642 | ret = bfd_close (abfd); |
643 | ||
644 | if (!ret) | |
3a76f8f4 PA |
645 | gdb_bfd_close_warning (name, |
646 | bfd_errmsg (bfd_get_error ())); | |
cbb099e8 TT |
647 | |
648 | return ret; | |
649 | } | |
650 | ||
596f7d67 | 651 | /* See gdb_bfd.h. */ |
cbb099e8 | 652 | |
520b0001 | 653 | void |
cbb099e8 TT |
654 | gdb_bfd_ref (struct bfd *abfd) |
655 | { | |
6ec53d05 | 656 | struct gdb_bfd_data *gdata; |
cbb099e8 TT |
657 | |
658 | if (abfd == NULL) | |
520b0001 | 659 | return; |
cbb099e8 | 660 | |
da0e2ac4 TT |
661 | #if CXX_STD_THREAD |
662 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
663 | #endif | |
664 | ||
9a3c8263 | 665 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
cbb099e8 | 666 | |
1e15fcac SM |
667 | bfd_cache_debug_printf ("Increase reference count on bfd %s (%s)", |
668 | host_address_to_string (abfd), | |
669 | bfd_get_filename (abfd)); | |
566f5e3b | 670 | |
6ec53d05 | 671 | if (gdata != NULL) |
cbb099e8 | 672 | { |
6ec53d05 | 673 | gdata->refc += 1; |
520b0001 | 674 | return; |
cbb099e8 TT |
675 | } |
676 | ||
3cae4447 TT |
677 | /* Caching only happens via gdb_bfd_open, so passing nullptr here is |
678 | fine. */ | |
679 | gdb_bfd_init_data (abfd, nullptr); | |
cbb099e8 TT |
680 | } |
681 | ||
596f7d67 | 682 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
683 | |
684 | void | |
685 | gdb_bfd_unref (struct bfd *abfd) | |
686 | { | |
6ec53d05 TT |
687 | struct gdb_bfd_data *gdata; |
688 | struct gdb_bfd_cache_search search; | |
06d5bbc8 | 689 | bfd *archive_bfd; |
cbb099e8 TT |
690 | |
691 | if (abfd == NULL) | |
692 | return; | |
693 | ||
da0e2ac4 TT |
694 | #if CXX_STD_THREAD |
695 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
696 | #endif | |
697 | ||
9a3c8263 | 698 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
6ec53d05 | 699 | gdb_assert (gdata->refc >= 1); |
cbb099e8 | 700 | |
6ec53d05 TT |
701 | gdata->refc -= 1; |
702 | if (gdata->refc > 0) | |
566f5e3b | 703 | { |
1e15fcac SM |
704 | bfd_cache_debug_printf ("Decrease reference count on bfd %s (%s)", |
705 | host_address_to_string (abfd), | |
706 | bfd_get_filename (abfd)); | |
566f5e3b AB |
707 | return; |
708 | } | |
709 | ||
1e15fcac SM |
710 | bfd_cache_debug_printf ("Delete final reference count on bfd %s (%s)", |
711 | host_address_to_string (abfd), | |
712 | bfd_get_filename (abfd)); | |
cbb099e8 | 713 | |
b82d08cd | 714 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
715 | search.filename = bfd_get_filename (abfd); |
716 | ||
717 | if (gdb_bfd_cache && search.filename) | |
718 | { | |
719 | hashval_t hash = htab_hash_string (search.filename); | |
720 | void **slot; | |
721 | ||
722 | search.mtime = gdata->mtime; | |
c04fe68f AB |
723 | search.size = gdata->size; |
724 | search.inode = gdata->inode; | |
725 | search.device_id = gdata->device_id; | |
6ec53d05 TT |
726 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, |
727 | NO_INSERT); | |
728 | ||
729 | if (slot && *slot) | |
730 | htab_clear_slot (gdb_bfd_cache, slot); | |
731 | } | |
732 | ||
06d5bbc8 | 733 | delete gdata; |
00f93c44 | 734 | bfd_set_usrdata (abfd, NULL); /* Paranoia. */ |
cbb099e8 | 735 | |
d6b28940 TT |
736 | htab_remove_elt (all_bfds, abfd); |
737 | ||
cbb099e8 | 738 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
739 | |
740 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 741 | } |
4bf44c1c TT |
742 | |
743 | /* A helper function that returns the section data descriptor | |
744 | associated with SECTION. If no such descriptor exists, a new one | |
745 | is allocated and cleared. */ | |
746 | ||
747 | static struct gdb_bfd_section_data * | |
748 | get_section_descriptor (asection *section) | |
749 | { | |
750 | struct gdb_bfd_section_data *result; | |
751 | ||
fd361982 | 752 | result = (struct gdb_bfd_section_data *) bfd_section_userdata (section); |
4bf44c1c TT |
753 | |
754 | if (result == NULL) | |
755 | { | |
224c3ddb SM |
756 | result = ((struct gdb_bfd_section_data *) |
757 | bfd_zalloc (section->owner, sizeof (*result))); | |
fd361982 | 758 | bfd_set_section_userdata (section, result); |
4bf44c1c TT |
759 | } |
760 | ||
761 | return result; | |
762 | } | |
763 | ||
4bf44c1c TT |
764 | /* See gdb_bfd.h. */ |
765 | ||
766 | const gdb_byte * | |
767 | gdb_bfd_map_section (asection *sectp, bfd_size_type *size) | |
768 | { | |
769 | bfd *abfd; | |
4bf44c1c | 770 | struct gdb_bfd_section_data *descriptor; |
ea9f10bb | 771 | bfd_byte *data; |
4bf44c1c TT |
772 | |
773 | gdb_assert ((sectp->flags & SEC_RELOC) == 0); | |
774 | gdb_assert (size != NULL); | |
775 | ||
776 | abfd = sectp->owner; | |
777 | ||
778 | descriptor = get_section_descriptor (sectp); | |
779 | ||
780 | /* If the data was already read for this BFD, just reuse it. */ | |
781 | if (descriptor->data != NULL) | |
782 | goto done; | |
783 | ||
ea9f10bb TT |
784 | #ifdef HAVE_MMAP |
785 | if (!bfd_is_section_compressed (abfd, sectp)) | |
4bf44c1c | 786 | { |
ea9f10bb TT |
787 | /* The page size, used when mmapping. */ |
788 | static int pagesize; | |
4bf44c1c | 789 | |
ea9f10bb TT |
790 | if (pagesize == 0) |
791 | pagesize = getpagesize (); | |
792 | ||
793 | /* Only try to mmap sections which are large enough: we don't want | |
794 | to waste space due to fragmentation. */ | |
795 | ||
fd361982 | 796 | if (bfd_section_size (sectp) > 4 * pagesize) |
ea9f10bb | 797 | { |
fd361982 | 798 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb TT |
799 | descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ, |
800 | MAP_PRIVATE, sectp->filepos, | |
801 | &descriptor->map_addr, | |
802 | &descriptor->map_len); | |
803 | ||
804 | if ((caddr_t)descriptor->data != MAP_FAILED) | |
805 | { | |
4bf44c1c | 806 | #if HAVE_POSIX_MADVISE |
ea9f10bb TT |
807 | posix_madvise (descriptor->map_addr, descriptor->map_len, |
808 | POSIX_MADV_WILLNEED); | |
4bf44c1c | 809 | #endif |
ea9f10bb TT |
810 | goto done; |
811 | } | |
4bf44c1c | 812 | |
ea9f10bb TT |
813 | /* On failure, clear out the section data and try again. */ |
814 | memset (descriptor, 0, sizeof (*descriptor)); | |
815 | } | |
816 | } | |
4bf44c1c TT |
817 | #endif /* HAVE_MMAP */ |
818 | ||
ea9f10bb TT |
819 | /* Handle compressed sections, or ordinary uncompressed sections in |
820 | the no-mmap case. */ | |
4bf44c1c | 821 | |
fd361982 | 822 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb | 823 | descriptor->data = NULL; |
4bf44c1c | 824 | |
ea9f10bb TT |
825 | data = NULL; |
826 | if (!bfd_get_full_section_contents (abfd, sectp, &data)) | |
41667530 MG |
827 | { |
828 | warning (_("Can't read data for section '%s' in file '%s'"), | |
fd361982 | 829 | bfd_section_name (sectp), |
41667530 MG |
830 | bfd_get_filename (abfd)); |
831 | /* Set size to 0 to prevent further attempts to read the invalid | |
832 | section. */ | |
833 | *size = 0; | |
cafb3438 | 834 | return NULL; |
41667530 | 835 | } |
ea9f10bb | 836 | descriptor->data = data; |
4bf44c1c TT |
837 | |
838 | done: | |
839 | gdb_assert (descriptor->data != NULL); | |
840 | *size = descriptor->size; | |
9a3c8263 | 841 | return (const gdb_byte *) descriptor->data; |
4bf44c1c | 842 | } |
64c31149 | 843 | |
dccee2de TT |
844 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
845 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
846 | not preserved. */ | |
847 | ||
848 | static int | |
849 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
850 | { | |
df2fc6fb | 851 | uint32_t file_crc = 0; |
dccee2de TT |
852 | |
853 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
854 | { | |
855 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
856 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
857 | return 0; | |
858 | } | |
859 | ||
860 | for (;;) | |
861 | { | |
862 | gdb_byte buffer[8 * 1024]; | |
863 | bfd_size_type count; | |
864 | ||
226f9f4f | 865 | count = bfd_read (buffer, sizeof (buffer), abfd); |
dccee2de TT |
866 | if (count == (bfd_size_type) -1) |
867 | { | |
868 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
869 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
870 | return 0; | |
871 | } | |
872 | if (count == 0) | |
873 | break; | |
874 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
875 | } | |
876 | ||
877 | *file_crc_return = file_crc; | |
878 | return 1; | |
879 | } | |
880 | ||
881 | /* See gdb_bfd.h. */ | |
882 | ||
883 | int | |
884 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
885 | { | |
9a3c8263 | 886 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
dccee2de TT |
887 | |
888 | if (!gdata->crc_computed) | |
889 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
890 | ||
891 | if (gdata->crc_computed) | |
892 | *crc_out = gdata->crc; | |
893 | return gdata->crc_computed; | |
894 | } | |
895 | ||
64c31149 TT |
896 | \f |
897 | ||
898 | /* See gdb_bfd.h. */ | |
899 | ||
192b62ce | 900 | gdb_bfd_ref_ptr |
64c31149 TT |
901 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, |
902 | int fd) | |
903 | { | |
904 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
905 | ||
0ecf4403 TT |
906 | if (result != nullptr) |
907 | bfd_set_cacheable (result, 1); | |
908 | ||
1831a9f9 | 909 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
910 | } |
911 | ||
912 | /* See gdb_bfd.h. */ | |
913 | ||
192b62ce | 914 | gdb_bfd_ref_ptr |
64c31149 TT |
915 | gdb_bfd_openr (const char *filename, const char *target) |
916 | { | |
917 | bfd *result = bfd_openr (filename, target); | |
918 | ||
1831a9f9 | 919 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
920 | } |
921 | ||
922 | /* See gdb_bfd.h. */ | |
923 | ||
192b62ce | 924 | gdb_bfd_ref_ptr |
64c31149 TT |
925 | gdb_bfd_openw (const char *filename, const char *target) |
926 | { | |
927 | bfd *result = bfd_openw (filename, target); | |
928 | ||
1831a9f9 | 929 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
930 | } |
931 | ||
932 | /* See gdb_bfd.h. */ | |
933 | ||
bb75a869 TT |
934 | gdb_bfd_ref_ptr |
935 | gdb_bfd_openr_iovec (const char *filename, const char *target, | |
936 | gdb_iovec_opener_ftype open_fn) | |
937 | { | |
938 | auto do_open = [] (bfd *nbfd, void *closure) -> void * | |
939 | { | |
940 | auto real_opener = static_cast<gdb_iovec_opener_ftype *> (closure); | |
941 | return (*real_opener) (nbfd); | |
942 | }; | |
943 | ||
944 | auto read_trampoline = [] (bfd *nbfd, void *stream, void *buf, | |
945 | file_ptr nbytes, file_ptr offset) -> file_ptr | |
946 | { | |
947 | gdb_bfd_iovec_base *obj = static_cast<gdb_bfd_iovec_base *> (stream); | |
948 | return obj->read (nbfd, buf, nbytes, offset); | |
949 | }; | |
950 | ||
951 | auto stat_trampoline = [] (struct bfd *abfd, void *stream, | |
952 | struct stat *sb) -> int | |
953 | { | |
954 | gdb_bfd_iovec_base *obj = static_cast<gdb_bfd_iovec_base *> (stream); | |
955 | return obj->stat (abfd, sb); | |
956 | }; | |
957 | ||
958 | auto close_trampoline = [] (struct bfd *nbfd, void *stream) -> int | |
959 | { | |
960 | gdb_bfd_iovec_base *obj = static_cast<gdb_bfd_iovec_base *> (stream); | |
961 | delete obj; | |
962 | /* Success. */ | |
963 | return 0; | |
964 | }; | |
965 | ||
966 | bfd *result = bfd_openr_iovec (filename, target, | |
967 | do_open, &open_fn, | |
968 | read_trampoline, close_trampoline, | |
969 | stat_trampoline); | |
970 | ||
971 | return gdb_bfd_ref_ptr::new_reference (result); | |
972 | } | |
973 | ||
974 | /* See gdb_bfd.h. */ | |
975 | ||
0cd61f44 TT |
976 | void |
977 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
978 | { | |
979 | struct gdb_bfd_data *gdata; | |
980 | ||
981 | gdb_bfd_ref (child); | |
982 | /* No need to stash the filename here, because we also keep a | |
983 | reference on the parent archive. */ | |
984 | ||
9a3c8263 | 985 | gdata = (struct gdb_bfd_data *) bfd_usrdata (child); |
0cd61f44 TT |
986 | if (gdata->archive_bfd == NULL) |
987 | { | |
988 | gdata->archive_bfd = parent; | |
989 | gdb_bfd_ref (parent); | |
990 | } | |
991 | else | |
992 | gdb_assert (gdata->archive_bfd == parent); | |
993 | } | |
994 | ||
995 | /* See gdb_bfd.h. */ | |
996 | ||
192b62ce | 997 | gdb_bfd_ref_ptr |
64c31149 TT |
998 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) |
999 | { | |
1000 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
1001 | ||
1002 | if (result) | |
0cd61f44 | 1003 | gdb_bfd_mark_parent (result, archive); |
64c31149 | 1004 | |
192b62ce | 1005 | return gdb_bfd_ref_ptr (result); |
64c31149 TT |
1006 | } |
1007 | ||
1008 | /* See gdb_bfd.h. */ | |
1009 | ||
13aaf454 DE |
1010 | void |
1011 | gdb_bfd_record_inclusion (bfd *includer, bfd *includee) | |
1012 | { | |
1013 | struct gdb_bfd_data *gdata; | |
1014 | ||
9a3c8263 | 1015 | gdata = (struct gdb_bfd_data *) bfd_usrdata (includer); |
1831a9f9 | 1016 | gdata->included_bfds.push_back (gdb_bfd_ref_ptr::new_reference (includee)); |
13aaf454 DE |
1017 | } |
1018 | ||
d6b28940 TT |
1019 | \f |
1020 | ||
69f6730d | 1021 | static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
65cf3563 TT |
1022 | |
1023 | /* See gdb_bfd.h. */ | |
1024 | ||
1025 | int | |
1026 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
1027 | { | |
1028 | if (section == NULL) | |
1029 | return -1; | |
1030 | else if (section == bfd_com_section_ptr) | |
ce9c0ca1 | 1031 | return bfd_count_sections (abfd); |
65cf3563 | 1032 | else if (section == bfd_und_section_ptr) |
ce9c0ca1 | 1033 | return bfd_count_sections (abfd) + 1; |
65cf3563 | 1034 | else if (section == bfd_abs_section_ptr) |
ce9c0ca1 | 1035 | return bfd_count_sections (abfd) + 2; |
65cf3563 | 1036 | else if (section == bfd_ind_section_ptr) |
ce9c0ca1 | 1037 | return bfd_count_sections (abfd) + 3; |
65cf3563 TT |
1038 | return section->index; |
1039 | } | |
1040 | ||
1041 | /* See gdb_bfd.h. */ | |
1042 | ||
1043 | int | |
1044 | gdb_bfd_count_sections (bfd *abfd) | |
1045 | { | |
1046 | return bfd_count_sections (abfd) + 4; | |
1047 | } | |
1048 | ||
1da77581 TT |
1049 | /* See gdb_bfd.h. */ |
1050 | ||
1051 | int | |
1052 | gdb_bfd_requires_relocations (bfd *abfd) | |
1053 | { | |
9a3c8263 | 1054 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
1da77581 TT |
1055 | |
1056 | if (gdata->relocation_computed == 0) | |
1057 | { | |
1058 | asection *sect; | |
1059 | ||
1060 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1061 | if ((sect->flags & SEC_RELOC) != 0) | |
1062 | { | |
1063 | gdata->needs_relocations = 1; | |
1064 | break; | |
1065 | } | |
1066 | ||
1067 | gdata->relocation_computed = 1; | |
1068 | } | |
1069 | ||
1070 | return gdata->needs_relocations; | |
1071 | } | |
1072 | ||
e0fc5c3f SM |
1073 | /* See gdb_bfd.h. */ |
1074 | ||
1075 | bool | |
1076 | gdb_bfd_get_full_section_contents (bfd *abfd, asection *section, | |
1077 | gdb::byte_vector *contents) | |
1078 | { | |
1079 | bfd_size_type section_size = bfd_section_size (section); | |
1080 | ||
1081 | contents->resize (section_size); | |
1082 | ||
1083 | return bfd_get_section_contents (abfd, section, contents->data (), 0, | |
1084 | section_size); | |
1085 | } | |
65cf3563 | 1086 | |
34b965f7 TT |
1087 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" |
1088 | #define AMBIGUOUS_MESS2 \ | |
1089 | ".\nUse \"set gnutarget format-name\" to specify the format." | |
1090 | ||
1091 | /* See gdb_bfd.h. */ | |
1092 | ||
1093 | std::string | |
1094 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) | |
1095 | { | |
1096 | char **p; | |
1097 | ||
1098 | /* Check if errmsg just need simple return. */ | |
1099 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) | |
1100 | return bfd_errmsg (error_tag); | |
1101 | ||
1102 | std::string ret (bfd_errmsg (error_tag)); | |
1103 | ret += AMBIGUOUS_MESS1; | |
1104 | ||
1105 | for (p = matching; *p; p++) | |
1106 | { | |
1107 | ret += " "; | |
1108 | ret += *p; | |
1109 | } | |
1110 | ret += AMBIGUOUS_MESS2; | |
1111 | ||
1112 | xfree (matching); | |
1113 | ||
1114 | return ret; | |
1115 | } | |
1116 | ||
d6b28940 TT |
1117 | /* A callback for htab_traverse that prints a single BFD. */ |
1118 | ||
1119 | static int | |
1120 | print_one_bfd (void **slot, void *data) | |
1121 | { | |
9a3c8263 SM |
1122 | bfd *abfd = (struct bfd *) *slot; |
1123 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
1124 | struct ui_out *uiout = (struct ui_out *) data; | |
d6b28940 | 1125 | |
2e783024 | 1126 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
381befee | 1127 | uiout->field_signed ("refcount", gdata->refc); |
112e8700 | 1128 | uiout->field_string ("addr", host_address_to_string (abfd)); |
972f7a4b TT |
1129 | uiout->field_string ("filename", bfd_get_filename (abfd), |
1130 | file_name_style.style ()); | |
112e8700 | 1131 | uiout->text ("\n"); |
d6b28940 TT |
1132 | |
1133 | return 1; | |
1134 | } | |
1135 | ||
1136 | /* Implement the 'maint info bfd' command. */ | |
1137 | ||
1138 | static void | |
e4e33335 | 1139 | maintenance_info_bfds (const char *arg, int from_tty) |
d6b28940 | 1140 | { |
d6b28940 TT |
1141 | struct ui_out *uiout = current_uiout; |
1142 | ||
4a2b031d | 1143 | ui_out_emit_table table_emitter (uiout, 3, -1, "bfds"); |
112e8700 SM |
1144 | uiout->table_header (10, ui_left, "refcount", "Refcount"); |
1145 | uiout->table_header (18, ui_left, "addr", "Address"); | |
1146 | uiout->table_header (40, ui_left, "filename", "Filename"); | |
d6b28940 | 1147 | |
112e8700 | 1148 | uiout->table_body (); |
d6b28940 | 1149 | htab_traverse (all_bfds, print_one_bfd, uiout); |
d6b28940 TT |
1150 | } |
1151 | ||
84e60555 KB |
1152 | /* BFD related per-inferior data. */ |
1153 | ||
1154 | struct bfd_inferior_data | |
1155 | { | |
1156 | std::unordered_map<std::string, unsigned long> bfd_error_string_counts; | |
1157 | }; | |
1158 | ||
1159 | /* Per-inferior data key. */ | |
1160 | ||
1161 | static const registry<inferior>::key<bfd_inferior_data> bfd_inferior_data_key; | |
1162 | ||
1163 | /* Fetch per-inferior BFD data. It always returns a valid pointer to | |
1164 | a bfd_inferior_data struct. */ | |
1165 | ||
1166 | static struct bfd_inferior_data * | |
1167 | get_bfd_inferior_data (struct inferior *inf) | |
1168 | { | |
1169 | struct bfd_inferior_data *data; | |
1170 | ||
1171 | data = bfd_inferior_data_key.get (inf); | |
1172 | if (data == nullptr) | |
1173 | data = bfd_inferior_data_key.emplace (inf); | |
1174 | ||
1175 | return data; | |
1176 | } | |
1177 | ||
1178 | /* Increment the BFD error count for STR and return the updated | |
1179 | count. */ | |
1180 | ||
1181 | static unsigned long | |
e8cd90f0 | 1182 | increment_bfd_error_count (const std::string &str) |
84e60555 | 1183 | { |
e8cd90f0 TT |
1184 | #if CXX_STD_THREAD |
1185 | std::lock_guard<std::recursive_mutex> guard (gdb_bfd_mutex); | |
1186 | #endif | |
84e60555 KB |
1187 | struct bfd_inferior_data *bid = get_bfd_inferior_data (current_inferior ()); |
1188 | ||
1189 | auto &map = bid->bfd_error_string_counts; | |
e8cd90f0 | 1190 | return ++map[str]; |
84e60555 KB |
1191 | } |
1192 | ||
e8cd90f0 TT |
1193 | /* A print callback for bfd_print_error. */ |
1194 | ||
1195 | static int | |
1196 | print_error_callback (void *stream, const char *fmt, ...) | |
1197 | { | |
1198 | string_file *file = (string_file *) stream; | |
1199 | size_t in_size = file->size (); | |
1200 | va_list ap; | |
1201 | va_start (ap, fmt); | |
1202 | file->vprintf (fmt, ap); | |
1203 | va_end (ap); | |
1204 | return file->size () - in_size; | |
1205 | } | |
84e60555 KB |
1206 | |
1207 | /* Define a BFD error handler which will suppress the printing of | |
1208 | messages which have been printed once already. This is done on a | |
1209 | per-inferior basis. */ | |
1210 | ||
77b7377b | 1211 | static void ATTRIBUTE_PRINTF (1, 0) |
84e60555 KB |
1212 | gdb_bfd_error_handler (const char *fmt, va_list ap) |
1213 | { | |
e8cd90f0 TT |
1214 | string_file output; |
1215 | bfd_print_error (print_error_callback, &output, fmt, ap); | |
1216 | std::string str = output.release (); | |
84e60555 | 1217 | |
e8cd90f0 | 1218 | if (increment_bfd_error_count (str) > 1) |
84e60555 KB |
1219 | return; |
1220 | ||
e8cd90f0 | 1221 | warning ("%s", str.c_str ()); |
84e60555 KB |
1222 | } |
1223 | ||
da0e2ac4 TT |
1224 | /* See gdb_bfd.h. */ |
1225 | ||
1226 | void | |
1227 | gdb_bfd_init () | |
1228 | { | |
1229 | if (bfd_init () == BFD_INIT_MAGIC) | |
1230 | { | |
1231 | #if CXX_STD_THREAD | |
1232 | if (bfd_thread_init (gdb_bfd_lock, gdb_bfd_unlock, nullptr)) | |
1233 | #endif | |
1234 | return; | |
1235 | } | |
1236 | ||
1237 | error (_("fatal error: libbfd ABI mismatch")); | |
1238 | } | |
1239 | ||
6c265988 | 1240 | void _initialize_gdb_bfd (); |
d6b28940 | 1241 | void |
6c265988 | 1242 | _initialize_gdb_bfd () |
d6b28940 TT |
1243 | { |
1244 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
1245 | NULL, xcalloc, xfree); | |
1246 | ||
1247 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
1248 | List the BFDs that are currently open."), | |
1249 | &maintenanceinfolist); | |
18989b3c AB |
1250 | |
1251 | add_setshow_boolean_cmd ("bfd-sharing", no_class, | |
1252 | &bfd_sharing, _("\ | |
1253 | Set whether gdb will share bfds that appear to be the same file."), _("\ | |
1254 | Show whether gdb will share bfds that appear to be the same file."), _("\ | |
1255 | When enabled gdb will reuse existing bfds rather than reopening the\n\ | |
1256 | same file. To decide if two files are the same then gdb compares the\n\ | |
1257 | filename, file size, file modification time, and file inode."), | |
1258 | NULL, | |
1259 | &show_bfd_sharing, | |
1260 | &maintenance_set_cmdlist, | |
1261 | &maintenance_show_cmdlist); | |
566f5e3b | 1262 | |
d4dd4fca SM |
1263 | add_setshow_boolean_cmd ("bfd-cache", class_maintenance, |
1264 | &debug_bfd_cache, | |
1265 | _("Set bfd cache debugging."), | |
1266 | _("Show bfd cache debugging."), | |
1267 | _("\ | |
566f5e3b | 1268 | When non-zero, bfd cache specific debugging is enabled."), |
d4dd4fca SM |
1269 | NULL, |
1270 | &show_bfd_cache_debug, | |
1271 | &setdebuglist, &showdebuglist); | |
84e60555 KB |
1272 | |
1273 | /* Hook the BFD error/warning handler to limit amount of output. */ | |
e8cd90f0 | 1274 | bfd_set_error_handler (gdb_bfd_error_handler); |
d6b28940 | 1275 | } |