Commit | Line | Data |
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c906108c | 1 | /* Multi-process/thread control for GDB, the GNU debugger. |
8926118c | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
7b6bb8da | 4 | 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 |
0fb0cc75 | 5 | Free Software Foundation, Inc. |
8926118c | 6 | |
b6ba6518 | 7 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. |
c906108c | 8 | |
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "symtab.h" | |
26 | #include "frame.h" | |
27 | #include "inferior.h" | |
28 | #include "environ.h" | |
29 | #include "value.h" | |
30 | #include "target.h" | |
31 | #include "gdbthread.h" | |
60250e8b | 32 | #include "exceptions.h" |
c906108c SS |
33 | #include "command.h" |
34 | #include "gdbcmd.h" | |
4e052eda | 35 | #include "regcache.h" |
5b7f31a4 | 36 | #include "gdb.h" |
b66d6d2e | 37 | #include "gdb_string.h" |
c906108c SS |
38 | |
39 | #include <ctype.h> | |
40 | #include <sys/types.h> | |
41 | #include <signal.h> | |
8b93c638 | 42 | #include "ui-out.h" |
683f2885 | 43 | #include "observer.h" |
d4fc5b1e | 44 | #include "annotate.h" |
94cc34af | 45 | #include "cli/cli-decode.h" |
60f98dde | 46 | #include "gdb_regex.h" |
aea5b279 | 47 | #include "cli/cli-utils.h" |
be34f849 | 48 | #include "continuations.h" |
94cc34af | 49 | |
c378eb4e | 50 | /* Definition of struct thread_info exported to gdbthread.h. */ |
c906108c | 51 | |
c378eb4e | 52 | /* Prototypes for exported functions. */ |
c906108c | 53 | |
a14ed312 | 54 | void _initialize_thread (void); |
c906108c | 55 | |
c378eb4e | 56 | /* Prototypes for local functions. */ |
c906108c | 57 | |
c906108c SS |
58 | static struct thread_info *thread_list = NULL; |
59 | static int highest_thread_num; | |
60 | ||
a14ed312 KB |
61 | static void thread_command (char *tidstr, int from_tty); |
62 | static void thread_apply_all_command (char *, int); | |
63 | static int thread_alive (struct thread_info *); | |
64 | static void info_threads_command (char *, int); | |
65 | static void thread_apply_command (char *, int); | |
39f77062 | 66 | static void restore_current_thread (ptid_t); |
a14ed312 | 67 | static void prune_threads (void); |
c906108c | 68 | |
4f8d22e3 PA |
69 | /* Frontend view of the thread state. Possible extensions: stepping, |
70 | finishing, until(ling),... */ | |
71 | enum thread_state | |
72 | { | |
73 | THREAD_STOPPED, | |
74 | THREAD_RUNNING, | |
75 | THREAD_EXITED, | |
76 | }; | |
77 | ||
a5321aa4 | 78 | struct thread_info* |
4e1c45ea | 79 | inferior_thread (void) |
8601f500 | 80 | { |
e09875d4 | 81 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
4e1c45ea PA |
82 | gdb_assert (tp); |
83 | return tp; | |
84 | } | |
8601f500 | 85 | |
4e1c45ea PA |
86 | void |
87 | delete_step_resume_breakpoint (struct thread_info *tp) | |
88 | { | |
8358c15c | 89 | if (tp && tp->control.step_resume_breakpoint) |
8601f500 | 90 | { |
8358c15c JK |
91 | delete_breakpoint (tp->control.step_resume_breakpoint); |
92 | tp->control.step_resume_breakpoint = NULL; | |
8601f500 MS |
93 | } |
94 | } | |
95 | ||
186c406b TT |
96 | void |
97 | delete_exception_resume_breakpoint (struct thread_info *tp) | |
98 | { | |
99 | if (tp && tp->control.exception_resume_breakpoint) | |
100 | { | |
101 | delete_breakpoint (tp->control.exception_resume_breakpoint); | |
102 | tp->control.exception_resume_breakpoint = NULL; | |
103 | } | |
104 | } | |
105 | ||
7c952b6d | 106 | static void |
4f8d22e3 | 107 | clear_thread_inferior_resources (struct thread_info *tp) |
7c952b6d ND |
108 | { |
109 | /* NOTE: this will take care of any left-over step_resume breakpoints, | |
4d8453a5 DJ |
110 | but not any user-specified thread-specific breakpoints. We can not |
111 | delete the breakpoint straight-off, because the inferior might not | |
112 | be stopped at the moment. */ | |
8358c15c | 113 | if (tp->control.step_resume_breakpoint) |
4f8d22e3 | 114 | { |
8358c15c JK |
115 | tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop; |
116 | tp->control.step_resume_breakpoint = NULL; | |
4f8d22e3 | 117 | } |
7c952b6d | 118 | |
186c406b TT |
119 | if (tp->control.exception_resume_breakpoint) |
120 | { | |
121 | tp->control.exception_resume_breakpoint->disposition | |
122 | = disp_del_at_next_stop; | |
123 | tp->control.exception_resume_breakpoint = NULL; | |
124 | } | |
125 | ||
16c381f0 | 126 | bpstat_clear (&tp->control.stop_bpstat); |
95e54da7 | 127 | |
fa4cd53f PA |
128 | do_all_intermediate_continuations_thread (tp, 1); |
129 | do_all_continuations_thread (tp, 1); | |
186c406b TT |
130 | |
131 | delete_longjmp_breakpoint (tp->num); | |
4f8d22e3 PA |
132 | } |
133 | ||
134 | static void | |
135 | free_thread (struct thread_info *tp) | |
136 | { | |
7c952b6d | 137 | if (tp->private) |
dc146f7c VP |
138 | { |
139 | if (tp->private_dtor) | |
140 | tp->private_dtor (tp->private); | |
141 | else | |
142 | xfree (tp->private); | |
143 | } | |
7c952b6d | 144 | |
4694da01 | 145 | xfree (tp->name); |
b8c9b27d | 146 | xfree (tp); |
7c952b6d ND |
147 | } |
148 | ||
c906108c | 149 | void |
fba45db2 | 150 | init_thread_list (void) |
c906108c SS |
151 | { |
152 | struct thread_info *tp, *tpnext; | |
153 | ||
7c952b6d | 154 | highest_thread_num = 0; |
8ea051c5 | 155 | |
c906108c SS |
156 | if (!thread_list) |
157 | return; | |
158 | ||
159 | for (tp = thread_list; tp; tp = tpnext) | |
160 | { | |
161 | tpnext = tp->next; | |
7c952b6d | 162 | free_thread (tp); |
c906108c SS |
163 | } |
164 | ||
165 | thread_list = NULL; | |
c906108c SS |
166 | } |
167 | ||
e58b0e63 PA |
168 | /* Allocate a new thread with target id PTID and add it to the thread |
169 | list. */ | |
170 | ||
171 | static struct thread_info * | |
172 | new_thread (ptid_t ptid) | |
173 | { | |
174 | struct thread_info *tp; | |
175 | ||
176 | tp = xcalloc (1, sizeof (*tp)); | |
177 | ||
178 | tp->ptid = ptid; | |
179 | tp->num = ++highest_thread_num; | |
180 | tp->next = thread_list; | |
181 | thread_list = tp; | |
182 | ||
183 | /* Nothing to follow yet. */ | |
184 | tp->pending_follow.kind = TARGET_WAITKIND_SPURIOUS; | |
185 | tp->state_ = THREAD_STOPPED; | |
186 | ||
187 | return tp; | |
188 | } | |
189 | ||
0d06e24b | 190 | struct thread_info * |
93815fbf | 191 | add_thread_silent (ptid_t ptid) |
c906108c SS |
192 | { |
193 | struct thread_info *tp; | |
194 | ||
e09875d4 | 195 | tp = find_thread_ptid (ptid); |
4f8d22e3 PA |
196 | if (tp) |
197 | /* Found an old thread with the same id. It has to be dead, | |
198 | otherwise we wouldn't be adding a new thread with the same id. | |
199 | The OS is reusing this id --- delete it, and recreate a new | |
200 | one. */ | |
201 | { | |
202 | /* In addition to deleting the thread, if this is the current | |
dcf4fbde PA |
203 | thread, then we need to take care that delete_thread doesn't |
204 | really delete the thread if it is inferior_ptid. Create a | |
205 | new template thread in the list with an invalid ptid, switch | |
206 | to it, delete the original thread, reset the new thread's | |
207 | ptid, and switch to it. */ | |
4f8d22e3 PA |
208 | |
209 | if (ptid_equal (inferior_ptid, ptid)) | |
210 | { | |
c820c52a | 211 | tp = new_thread (null_ptid); |
dcf4fbde PA |
212 | |
213 | /* Make switch_to_thread not read from the thread. */ | |
214 | tp->state_ = THREAD_EXITED; | |
c820c52a | 215 | switch_to_thread (null_ptid); |
4f8d22e3 PA |
216 | |
217 | /* Now we can delete it. */ | |
218 | delete_thread (ptid); | |
219 | ||
dcf4fbde | 220 | /* Now reset its ptid, and reswitch inferior_ptid to it. */ |
4f8d22e3 | 221 | tp->ptid = ptid; |
dcf4fbde | 222 | tp->state_ = THREAD_STOPPED; |
4f8d22e3 PA |
223 | switch_to_thread (ptid); |
224 | ||
225 | observer_notify_new_thread (tp); | |
226 | ||
227 | /* All done. */ | |
228 | return tp; | |
229 | } | |
230 | else | |
231 | /* Just go ahead and delete it. */ | |
232 | delete_thread (ptid); | |
233 | } | |
234 | ||
e58b0e63 | 235 | tp = new_thread (ptid); |
cfc01461 VP |
236 | observer_notify_new_thread (tp); |
237 | ||
0d06e24b | 238 | return tp; |
c906108c SS |
239 | } |
240 | ||
93815fbf | 241 | struct thread_info * |
17faa917 | 242 | add_thread_with_info (ptid_t ptid, struct private_thread_info *private) |
93815fbf VP |
243 | { |
244 | struct thread_info *result = add_thread_silent (ptid); | |
245 | ||
17faa917 DJ |
246 | result->private = private; |
247 | ||
93815fbf | 248 | if (print_thread_events) |
fd532e2e | 249 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
d4fc5b1e NR |
250 | |
251 | annotate_new_thread (); | |
93815fbf VP |
252 | return result; |
253 | } | |
254 | ||
17faa917 DJ |
255 | struct thread_info * |
256 | add_thread (ptid_t ptid) | |
257 | { | |
258 | return add_thread_with_info (ptid, NULL); | |
259 | } | |
260 | ||
5e0b29c1 PA |
261 | /* Delete thread PTID. If SILENT, don't notify the observer of this |
262 | exit. */ | |
263 | static void | |
264 | delete_thread_1 (ptid_t ptid, int silent) | |
c906108c SS |
265 | { |
266 | struct thread_info *tp, *tpprev; | |
267 | ||
268 | tpprev = NULL; | |
269 | ||
270 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) | |
39f77062 | 271 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
272 | break; |
273 | ||
274 | if (!tp) | |
275 | return; | |
276 | ||
4f8d22e3 PA |
277 | /* If this is the current thread, or there's code out there that |
278 | relies on it existing (refcount > 0) we can't delete yet. Mark | |
279 | it as exited, and notify it. */ | |
280 | if (tp->refcount > 0 | |
281 | || ptid_equal (tp->ptid, inferior_ptid)) | |
282 | { | |
283 | if (tp->state_ != THREAD_EXITED) | |
284 | { | |
a07daef3 | 285 | observer_notify_thread_exit (tp, silent); |
4f8d22e3 PA |
286 | |
287 | /* Tag it as exited. */ | |
288 | tp->state_ = THREAD_EXITED; | |
289 | ||
290 | /* Clear breakpoints, etc. associated with this thread. */ | |
291 | clear_thread_inferior_resources (tp); | |
292 | } | |
293 | ||
294 | /* Will be really deleted some other time. */ | |
295 | return; | |
296 | } | |
297 | ||
fa4cd53f PA |
298 | /* Notify thread exit, but only if we haven't already. */ |
299 | if (tp->state_ != THREAD_EXITED) | |
300 | observer_notify_thread_exit (tp, silent); | |
301 | ||
302 | /* Tag it as exited. */ | |
303 | tp->state_ = THREAD_EXITED; | |
304 | clear_thread_inferior_resources (tp); | |
305 | ||
c906108c SS |
306 | if (tpprev) |
307 | tpprev->next = tp->next; | |
308 | else | |
309 | thread_list = tp->next; | |
310 | ||
7c952b6d | 311 | free_thread (tp); |
c906108c SS |
312 | } |
313 | ||
4f8d22e3 PA |
314 | /* Delete thread PTID and notify of thread exit. If this is |
315 | inferior_ptid, don't actually delete it, but tag it as exited and | |
316 | do the notification. If PTID is the user selected thread, clear | |
317 | it. */ | |
5e0b29c1 PA |
318 | void |
319 | delete_thread (ptid_t ptid) | |
320 | { | |
321 | delete_thread_1 (ptid, 0 /* not silent */); | |
322 | } | |
323 | ||
324 | void | |
325 | delete_thread_silent (ptid_t ptid) | |
326 | { | |
327 | delete_thread_1 (ptid, 1 /* silent */); | |
328 | } | |
329 | ||
1e92afda | 330 | struct thread_info * |
fba45db2 | 331 | find_thread_id (int num) |
c906108c SS |
332 | { |
333 | struct thread_info *tp; | |
334 | ||
335 | for (tp = thread_list; tp; tp = tp->next) | |
336 | if (tp->num == num) | |
337 | return tp; | |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
39f77062 | 342 | /* Find a thread_info by matching PTID. */ |
0d06e24b | 343 | struct thread_info * |
e09875d4 | 344 | find_thread_ptid (ptid_t ptid) |
0d06e24b JM |
345 | { |
346 | struct thread_info *tp; | |
347 | ||
348 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 349 | if (ptid_equal (tp->ptid, ptid)) |
0d06e24b JM |
350 | return tp; |
351 | ||
352 | return NULL; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Thread iterator function. | |
357 | * | |
358 | * Calls a callback function once for each thread, so long as | |
359 | * the callback function returns false. If the callback function | |
360 | * returns true, the iteration will end and the current thread | |
361 | * will be returned. This can be useful for implementing a | |
362 | * search for a thread with arbitrary attributes, or for applying | |
363 | * some operation to every thread. | |
364 | * | |
365 | * FIXME: some of the existing functionality, such as | |
366 | * "Thread apply all", might be rewritten using this functionality. | |
367 | */ | |
368 | ||
369 | struct thread_info * | |
fd118b61 KB |
370 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
371 | void *data) | |
0d06e24b | 372 | { |
4f8d22e3 | 373 | struct thread_info *tp, *next; |
0d06e24b | 374 | |
4f8d22e3 PA |
375 | for (tp = thread_list; tp; tp = next) |
376 | { | |
377 | next = tp->next; | |
378 | if ((*callback) (tp, data)) | |
379 | return tp; | |
380 | } | |
0d06e24b JM |
381 | |
382 | return NULL; | |
383 | } | |
384 | ||
20874c92 VP |
385 | int |
386 | thread_count (void) | |
387 | { | |
388 | int result = 0; | |
389 | struct thread_info *tp; | |
390 | ||
391 | for (tp = thread_list; tp; tp = tp->next) | |
392 | ++result; | |
393 | ||
394 | return result; | |
395 | } | |
396 | ||
c906108c | 397 | int |
fba45db2 | 398 | valid_thread_id (int num) |
c906108c SS |
399 | { |
400 | struct thread_info *tp; | |
401 | ||
402 | for (tp = thread_list; tp; tp = tp->next) | |
403 | if (tp->num == num) | |
404 | return 1; | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | int | |
39f77062 | 410 | pid_to_thread_id (ptid_t ptid) |
c906108c SS |
411 | { |
412 | struct thread_info *tp; | |
413 | ||
414 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 415 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
416 | return tp->num; |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
39f77062 | 421 | ptid_t |
fba45db2 | 422 | thread_id_to_pid (int num) |
c906108c SS |
423 | { |
424 | struct thread_info *thread = find_thread_id (num); | |
5d502164 | 425 | |
c906108c | 426 | if (thread) |
39f77062 | 427 | return thread->ptid; |
c906108c | 428 | else |
39f77062 | 429 | return pid_to_ptid (-1); |
c906108c SS |
430 | } |
431 | ||
432 | int | |
39f77062 | 433 | in_thread_list (ptid_t ptid) |
c906108c SS |
434 | { |
435 | struct thread_info *tp; | |
436 | ||
437 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 438 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
439 | return 1; |
440 | ||
c378eb4e | 441 | return 0; /* Never heard of 'im. */ |
c906108c | 442 | } |
8926118c | 443 | |
bad34192 PA |
444 | /* Finds the first thread of the inferior given by PID. If PID is -1, |
445 | return the first thread in the list. */ | |
446 | ||
447 | struct thread_info * | |
448 | first_thread_of_process (int pid) | |
449 | { | |
450 | struct thread_info *tp, *ret = NULL; | |
451 | ||
452 | for (tp = thread_list; tp; tp = tp->next) | |
453 | if (pid == -1 || ptid_get_pid (tp->ptid) == pid) | |
454 | if (ret == NULL || tp->num < ret->num) | |
455 | ret = tp; | |
456 | ||
457 | return ret; | |
458 | } | |
459 | ||
2277426b PA |
460 | struct thread_info * |
461 | any_thread_of_process (int pid) | |
462 | { | |
463 | struct thread_info *tp; | |
464 | ||
465 | for (tp = thread_list; tp; tp = tp->next) | |
466 | if (ptid_get_pid (tp->ptid) == pid) | |
467 | return tp; | |
468 | ||
469 | return NULL; | |
470 | } | |
471 | ||
6c95b8df PA |
472 | struct thread_info * |
473 | any_live_thread_of_process (int pid) | |
474 | { | |
475 | struct thread_info *tp; | |
9941e0c5 | 476 | struct thread_info *tp_executing = NULL; |
6c95b8df PA |
477 | |
478 | for (tp = thread_list; tp; tp = tp->next) | |
9941e0c5 | 479 | if (tp->state_ != THREAD_EXITED && ptid_get_pid (tp->ptid) == pid) |
6c95b8df | 480 | { |
9941e0c5 MK |
481 | if (tp->executing_) |
482 | tp_executing = tp; | |
483 | else | |
6c95b8df | 484 | return tp; |
6c95b8df PA |
485 | } |
486 | ||
9941e0c5 | 487 | return tp_executing; |
6c95b8df PA |
488 | } |
489 | ||
8b93c638 | 490 | /* Print a list of thread ids currently known, and the total number of |
c378eb4e | 491 | threads. To be used from within catch_errors. */ |
6949171e JJ |
492 | static int |
493 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) | |
8b93c638 JM |
494 | { |
495 | struct thread_info *tp; | |
496 | int num = 0; | |
3b31d625 | 497 | struct cleanup *cleanup_chain; |
592375cd | 498 | int current_thread = -1; |
8b93c638 | 499 | |
dc146f7c | 500 | update_thread_list (); |
7990a578 | 501 | |
3b31d625 | 502 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
8b93c638 JM |
503 | |
504 | for (tp = thread_list; tp; tp = tp->next) | |
505 | { | |
4f8d22e3 PA |
506 | if (tp->state_ == THREAD_EXITED) |
507 | continue; | |
592375cd VP |
508 | |
509 | if (ptid_equal (tp->ptid, inferior_ptid)) | |
510 | current_thread = tp->num; | |
511 | ||
8b93c638 JM |
512 | num++; |
513 | ui_out_field_int (uiout, "thread-id", tp->num); | |
514 | } | |
515 | ||
3b31d625 | 516 | do_cleanups (cleanup_chain); |
592375cd VP |
517 | |
518 | if (current_thread != -1) | |
519 | ui_out_field_int (uiout, "current-thread-id", current_thread); | |
8b93c638 JM |
520 | ui_out_field_int (uiout, "number-of-threads", num); |
521 | return GDB_RC_OK; | |
522 | } | |
523 | ||
524 | /* Official gdblib interface function to get a list of thread ids and | |
c378eb4e | 525 | the total number. */ |
8b93c638 | 526 | enum gdb_rc |
ce43223b | 527 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
8b93c638 | 528 | { |
b0b13bb4 DJ |
529 | if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
530 | error_message, RETURN_MASK_ALL) < 0) | |
531 | return GDB_RC_FAIL; | |
532 | return GDB_RC_OK; | |
8b93c638 | 533 | } |
c906108c | 534 | |
c378eb4e | 535 | /* Return true if TP is an active thread. */ |
c906108c | 536 | static int |
fba45db2 | 537 | thread_alive (struct thread_info *tp) |
c906108c | 538 | { |
4f8d22e3 | 539 | if (tp->state_ == THREAD_EXITED) |
c906108c | 540 | return 0; |
39f77062 | 541 | if (!target_thread_alive (tp->ptid)) |
4f8d22e3 | 542 | return 0; |
c906108c SS |
543 | return 1; |
544 | } | |
545 | ||
546 | static void | |
fba45db2 | 547 | prune_threads (void) |
c906108c | 548 | { |
d4f3574e | 549 | struct thread_info *tp, *next; |
c906108c | 550 | |
c906108c SS |
551 | for (tp = thread_list; tp; tp = next) |
552 | { | |
553 | next = tp->next; | |
554 | if (!thread_alive (tp)) | |
39f77062 | 555 | delete_thread (tp->ptid); |
c906108c SS |
556 | } |
557 | } | |
558 | ||
5231c1fd PA |
559 | void |
560 | thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid) | |
561 | { | |
82f73884 PA |
562 | struct inferior *inf; |
563 | struct thread_info *tp; | |
564 | ||
565 | /* It can happen that what we knew as the target inferior id | |
566 | changes. E.g, target remote may only discover the remote process | |
567 | pid after adding the inferior to GDB's list. */ | |
568 | inf = find_inferior_pid (ptid_get_pid (old_ptid)); | |
569 | inf->pid = ptid_get_pid (new_ptid); | |
570 | ||
e09875d4 | 571 | tp = find_thread_ptid (old_ptid); |
5231c1fd PA |
572 | tp->ptid = new_ptid; |
573 | ||
574 | observer_notify_thread_ptid_changed (old_ptid, new_ptid); | |
575 | } | |
576 | ||
e1ac3328 VP |
577 | void |
578 | set_running (ptid_t ptid, int running) | |
579 | { | |
580 | struct thread_info *tp; | |
d90e17a7 | 581 | int all = ptid_equal (ptid, minus_one_ptid); |
e1ac3328 | 582 | |
e1ac3328 VP |
583 | /* We try not to notify the observer if no thread has actually changed |
584 | the running state -- merely to reduce the number of messages to | |
585 | frontend. Frontend is supposed to handle multiple *running just fine. */ | |
d90e17a7 | 586 | if (all || ptid_is_pid (ptid)) |
e1ac3328 VP |
587 | { |
588 | int any_started = 0; | |
5d502164 | 589 | |
e1ac3328 | 590 | for (tp = thread_list; tp; tp = tp->next) |
d90e17a7 PA |
591 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
592 | { | |
593 | if (tp->state_ == THREAD_EXITED) | |
594 | continue; | |
595 | if (running && tp->state_ == THREAD_STOPPED) | |
596 | any_started = 1; | |
597 | tp->state_ = running ? THREAD_RUNNING : THREAD_STOPPED; | |
598 | } | |
c5a4d20b PA |
599 | if (any_started) |
600 | observer_notify_target_resumed (ptid); | |
e1ac3328 VP |
601 | } |
602 | else | |
603 | { | |
4f8d22e3 | 604 | int started = 0; |
5d502164 | 605 | |
e09875d4 | 606 | tp = find_thread_ptid (ptid); |
e1ac3328 | 607 | gdb_assert (tp); |
4f8d22e3 PA |
608 | gdb_assert (tp->state_ != THREAD_EXITED); |
609 | if (running && tp->state_ == THREAD_STOPPED) | |
610 | started = 1; | |
611 | tp->state_ = running ? THREAD_RUNNING : THREAD_STOPPED; | |
c5a4d20b | 612 | if (started) |
4f8d22e3 PA |
613 | observer_notify_target_resumed (ptid); |
614 | } | |
e1ac3328 VP |
615 | } |
616 | ||
4f8d22e3 PA |
617 | static int |
618 | is_thread_state (ptid_t ptid, enum thread_state state) | |
e1ac3328 VP |
619 | { |
620 | struct thread_info *tp; | |
621 | ||
e09875d4 | 622 | tp = find_thread_ptid (ptid); |
e1ac3328 | 623 | gdb_assert (tp); |
4f8d22e3 PA |
624 | return tp->state_ == state; |
625 | } | |
626 | ||
627 | int | |
628 | is_stopped (ptid_t ptid) | |
629 | { | |
4f8d22e3 PA |
630 | return is_thread_state (ptid, THREAD_STOPPED); |
631 | } | |
632 | ||
633 | int | |
634 | is_exited (ptid_t ptid) | |
635 | { | |
4f8d22e3 PA |
636 | return is_thread_state (ptid, THREAD_EXITED); |
637 | } | |
638 | ||
639 | int | |
640 | is_running (ptid_t ptid) | |
641 | { | |
4f8d22e3 | 642 | return is_thread_state (ptid, THREAD_RUNNING); |
e1ac3328 VP |
643 | } |
644 | ||
8ea051c5 PA |
645 | int |
646 | any_running (void) | |
647 | { | |
648 | struct thread_info *tp; | |
649 | ||
8ea051c5 | 650 | for (tp = thread_list; tp; tp = tp->next) |
4f8d22e3 | 651 | if (tp->state_ == THREAD_RUNNING) |
8ea051c5 PA |
652 | return 1; |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | int | |
658 | is_executing (ptid_t ptid) | |
659 | { | |
660 | struct thread_info *tp; | |
661 | ||
e09875d4 | 662 | tp = find_thread_ptid (ptid); |
8ea051c5 PA |
663 | gdb_assert (tp); |
664 | return tp->executing_; | |
665 | } | |
666 | ||
667 | void | |
668 | set_executing (ptid_t ptid, int executing) | |
669 | { | |
670 | struct thread_info *tp; | |
d90e17a7 | 671 | int all = ptid_equal (ptid, minus_one_ptid); |
8ea051c5 | 672 | |
d90e17a7 | 673 | if (all || ptid_is_pid (ptid)) |
8ea051c5 PA |
674 | { |
675 | for (tp = thread_list; tp; tp = tp->next) | |
d90e17a7 PA |
676 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
677 | tp->executing_ = executing; | |
8ea051c5 PA |
678 | } |
679 | else | |
680 | { | |
e09875d4 | 681 | tp = find_thread_ptid (ptid); |
8ea051c5 PA |
682 | gdb_assert (tp); |
683 | tp->executing_ = executing; | |
684 | } | |
685 | } | |
686 | ||
252fbfc8 PA |
687 | void |
688 | set_stop_requested (ptid_t ptid, int stop) | |
689 | { | |
690 | struct thread_info *tp; | |
691 | int all = ptid_equal (ptid, minus_one_ptid); | |
692 | ||
693 | if (all || ptid_is_pid (ptid)) | |
694 | { | |
695 | for (tp = thread_list; tp; tp = tp->next) | |
696 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) | |
697 | tp->stop_requested = stop; | |
698 | } | |
699 | else | |
700 | { | |
e09875d4 | 701 | tp = find_thread_ptid (ptid); |
252fbfc8 PA |
702 | gdb_assert (tp); |
703 | tp->stop_requested = stop; | |
704 | } | |
705 | ||
706 | /* Call the stop requested observer so other components of GDB can | |
707 | react to this request. */ | |
708 | if (stop) | |
709 | observer_notify_thread_stop_requested (ptid); | |
710 | } | |
711 | ||
29f49a6a PA |
712 | void |
713 | finish_thread_state (ptid_t ptid) | |
714 | { | |
715 | struct thread_info *tp; | |
716 | int all; | |
717 | int any_started = 0; | |
718 | ||
719 | all = ptid_equal (ptid, minus_one_ptid); | |
720 | ||
721 | if (all || ptid_is_pid (ptid)) | |
722 | { | |
723 | for (tp = thread_list; tp; tp = tp->next) | |
724 | { | |
725 | if (tp->state_ == THREAD_EXITED) | |
726 | continue; | |
727 | if (all || ptid_get_pid (ptid) == ptid_get_pid (tp->ptid)) | |
728 | { | |
729 | if (tp->executing_ && tp->state_ == THREAD_STOPPED) | |
730 | any_started = 1; | |
731 | tp->state_ = tp->executing_ ? THREAD_RUNNING : THREAD_STOPPED; | |
732 | } | |
733 | } | |
734 | } | |
735 | else | |
736 | { | |
e09875d4 | 737 | tp = find_thread_ptid (ptid); |
29f49a6a PA |
738 | gdb_assert (tp); |
739 | if (tp->state_ != THREAD_EXITED) | |
740 | { | |
741 | if (tp->executing_ && tp->state_ == THREAD_STOPPED) | |
742 | any_started = 1; | |
743 | tp->state_ = tp->executing_ ? THREAD_RUNNING : THREAD_STOPPED; | |
744 | } | |
745 | } | |
746 | ||
747 | if (any_started) | |
748 | observer_notify_target_resumed (ptid); | |
749 | } | |
750 | ||
751 | void | |
752 | finish_thread_state_cleanup (void *arg) | |
753 | { | |
754 | ptid_t *ptid_p = arg; | |
755 | ||
756 | gdb_assert (arg); | |
757 | ||
758 | finish_thread_state (*ptid_p); | |
759 | } | |
760 | ||
8e8901c5 | 761 | /* Prints the list of threads and their details on UIOUT. |
aea5b279 | 762 | This is a version of 'info_threads_command' suitable for |
c378eb4e | 763 | use from MI. |
4f8d22e3 | 764 | If REQUESTED_THREAD is not -1, it's the GDB id of the thread |
8e8901c5 | 765 | that should be printed. Otherwise, all threads are |
c378eb4e | 766 | printed. |
3ee1c036 | 767 | If PID is not -1, only print threads from the process PID. |
c378eb4e | 768 | Otherwise, threads from all attached PIDs are printed. |
3ee1c036 VP |
769 | If both REQUESTED_THREAD and PID are not -1, then the thread |
770 | is printed if it belongs to the specified process. Otherwise, | |
771 | an error is raised. */ | |
8e8901c5 | 772 | void |
aea5b279 | 773 | print_thread_info (struct ui_out *uiout, char *requested_threads, int pid) |
c906108c SS |
774 | { |
775 | struct thread_info *tp; | |
39f77062 | 776 | ptid_t current_ptid; |
99b3d574 | 777 | struct cleanup *old_chain; |
4694da01 | 778 | char *extra_info, *name, *target_id; |
8e8901c5 | 779 | int current_thread = -1; |
c906108c | 780 | |
dc146f7c | 781 | update_thread_list (); |
39f77062 | 782 | current_ptid = inferior_ptid; |
4f8d22e3 PA |
783 | |
784 | /* We'll be switching threads temporarily. */ | |
785 | old_chain = make_cleanup_restore_current_thread (); | |
786 | ||
a7658b96 TT |
787 | /* For backward compatibility, we make a list for MI. A table is |
788 | preferable for the CLI, though, because it shows table | |
789 | headers. */ | |
790 | if (ui_out_is_mi_like_p (uiout)) | |
791 | make_cleanup_ui_out_list_begin_end (uiout, "threads"); | |
792 | else | |
793 | { | |
794 | int n_threads = 0; | |
795 | ||
796 | for (tp = thread_list; tp; tp = tp->next) | |
797 | { | |
aea5b279 | 798 | if (!number_is_in_list (requested_threads, tp->num)) |
a7658b96 TT |
799 | continue; |
800 | ||
801 | if (pid != -1 && PIDGET (tp->ptid) != pid) | |
802 | continue; | |
803 | ||
804 | if (tp->state_ == THREAD_EXITED) | |
805 | continue; | |
806 | ||
807 | ++n_threads; | |
808 | } | |
809 | ||
810 | if (n_threads == 0) | |
811 | { | |
aea5b279 | 812 | if (requested_threads == NULL || *requested_threads == '\0') |
a7658b96 TT |
813 | ui_out_message (uiout, 0, _("No threads.\n")); |
814 | else | |
aea5b279 MS |
815 | ui_out_message (uiout, 0, _("No threads match '%s'.\n"), |
816 | requested_threads); | |
a7658b96 TT |
817 | do_cleanups (old_chain); |
818 | return; | |
819 | } | |
820 | ||
4694da01 | 821 | make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads"); |
a7658b96 TT |
822 | |
823 | ui_out_table_header (uiout, 1, ui_left, "current", ""); | |
824 | ui_out_table_header (uiout, 4, ui_left, "id", "Id"); | |
825 | ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id"); | |
a7658b96 TT |
826 | ui_out_table_header (uiout, 1, ui_left, "frame", "Frame"); |
827 | ui_out_table_body (uiout); | |
828 | } | |
829 | ||
c906108c SS |
830 | for (tp = thread_list; tp; tp = tp->next) |
831 | { | |
8e8901c5 | 832 | struct cleanup *chain2; |
dc146f7c | 833 | int core; |
8e8901c5 | 834 | |
aea5b279 | 835 | if (!number_is_in_list (requested_threads, tp->num)) |
8e8901c5 VP |
836 | continue; |
837 | ||
3ee1c036 VP |
838 | if (pid != -1 && PIDGET (tp->ptid) != pid) |
839 | { | |
aea5b279 | 840 | if (requested_threads != NULL && *requested_threads != '\0') |
3ee1c036 VP |
841 | error (_("Requested thread not found in requested process")); |
842 | continue; | |
843 | } | |
844 | ||
4f8d22e3 PA |
845 | if (ptid_equal (tp->ptid, current_ptid)) |
846 | current_thread = tp->num; | |
847 | ||
848 | if (tp->state_ == THREAD_EXITED) | |
849 | continue; | |
850 | ||
8e8901c5 VP |
851 | chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
852 | ||
a7658b96 TT |
853 | if (ui_out_is_mi_like_p (uiout)) |
854 | { | |
855 | /* Compatibility. */ | |
856 | if (ptid_equal (tp->ptid, current_ptid)) | |
857 | ui_out_text (uiout, "* "); | |
858 | else | |
859 | ui_out_text (uiout, " "); | |
860 | } | |
c906108c | 861 | else |
a7658b96 TT |
862 | { |
863 | if (ptid_equal (tp->ptid, current_ptid)) | |
864 | ui_out_field_string (uiout, "current", "*"); | |
865 | else | |
866 | ui_out_field_skip (uiout, "current"); | |
867 | } | |
c906108c | 868 | |
8e8901c5 | 869 | ui_out_field_int (uiout, "id", tp->num); |
0d06e24b | 870 | |
4694da01 TT |
871 | /* For the CLI, we stuff everything into the target-id field. |
872 | This is a gross hack to make the output come out looking | |
873 | correct. The underlying problem here is that ui-out has no | |
874 | way to specify that a field's space allocation should be | |
875 | shared by several fields. For MI, we do the right thing | |
876 | instead. */ | |
877 | ||
878 | target_id = target_pid_to_str (tp->ptid); | |
ed406532 | 879 | extra_info = target_extra_thread_info (tp); |
4694da01 TT |
880 | name = tp->name ? tp->name : target_thread_name (tp); |
881 | ||
882 | if (ui_out_is_mi_like_p (uiout)) | |
8e8901c5 | 883 | { |
4694da01 TT |
884 | ui_out_field_string (uiout, "target-id", target_id); |
885 | if (extra_info) | |
886 | ui_out_field_string (uiout, "details", extra_info); | |
887 | if (name) | |
888 | ui_out_field_string (uiout, "name", name); | |
889 | } | |
890 | else | |
891 | { | |
892 | struct cleanup *str_cleanup; | |
893 | char *contents; | |
894 | ||
895 | if (extra_info && name) | |
896 | contents = xstrprintf ("%s \"%s\" (%s)", target_id, | |
897 | name, extra_info); | |
898 | else if (extra_info) | |
899 | contents = xstrprintf ("%s (%s)", target_id, extra_info); | |
900 | else if (name) | |
901 | contents = xstrprintf ("%s \"%s\"", target_id, name); | |
902 | else | |
903 | contents = xstrdup (target_id); | |
904 | str_cleanup = make_cleanup (xfree, contents); | |
905 | ||
906 | ui_out_field_string (uiout, "target-id", contents); | |
907 | do_cleanups (str_cleanup); | |
8e8901c5 | 908 | } |
4f8d22e3 PA |
909 | |
910 | if (tp->state_ == THREAD_RUNNING) | |
94cc34af PA |
911 | ui_out_text (uiout, "(running)\n"); |
912 | else | |
913 | { | |
914 | /* The switch below puts us at the top of the stack (leaf | |
915 | frame). */ | |
916 | switch_to_thread (tp->ptid); | |
917 | print_stack_frame (get_selected_frame (NULL), | |
918 | /* For MI output, print frame level. */ | |
919 | ui_out_is_mi_like_p (uiout), | |
920 | LOCATION); | |
921 | } | |
8e8901c5 | 922 | |
90139f7d VP |
923 | if (ui_out_is_mi_like_p (uiout)) |
924 | { | |
925 | char *state = "stopped"; | |
5d502164 | 926 | |
ed406532 | 927 | if (tp->state_ == THREAD_RUNNING) |
90139f7d VP |
928 | state = "running"; |
929 | ui_out_field_string (uiout, "state", state); | |
930 | } | |
931 | ||
dc146f7c VP |
932 | core = target_core_of_thread (tp->ptid); |
933 | if (ui_out_is_mi_like_p (uiout) && core != -1) | |
934 | ui_out_field_int (uiout, "core", core); | |
935 | ||
8e8901c5 | 936 | do_cleanups (chain2); |
c906108c SS |
937 | } |
938 | ||
99b3d574 DP |
939 | /* Restores the current thread and the frame selected before |
940 | the "info threads" command. */ | |
941 | do_cleanups (old_chain); | |
c906108c | 942 | |
aea5b279 | 943 | if (pid == -1 && requested_threads == NULL) |
8e8901c5 | 944 | { |
4f8d22e3 | 945 | gdb_assert (current_thread != -1 |
d729566a PA |
946 | || !thread_list |
947 | || ptid_equal (inferior_ptid, null_ptid)); | |
0bcd3e20 | 948 | if (current_thread != -1 && ui_out_is_mi_like_p (uiout)) |
8e8901c5 | 949 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
94cc34af | 950 | |
4f8d22e3 PA |
951 | if (current_thread != -1 && is_exited (current_ptid)) |
952 | ui_out_message (uiout, 0, "\n\ | |
953 | The current thread <Thread ID %d> has terminated. See `help thread'.\n", | |
954 | current_thread); | |
d729566a PA |
955 | else if (thread_list |
956 | && current_thread == -1 | |
957 | && ptid_equal (current_ptid, null_ptid)) | |
958 | ui_out_message (uiout, 0, "\n\ | |
959 | No selected thread. See `help thread'.\n"); | |
c906108c | 960 | } |
c906108c SS |
961 | } |
962 | ||
8e8901c5 VP |
963 | /* Print information about currently known threads |
964 | ||
60f98dde MS |
965 | Optional ARG is a thread id, or list of thread ids. |
966 | ||
967 | Note: this has the drawback that it _really_ switches | |
968 | threads, which frees the frame cache. A no-side | |
969 | effects info-threads command would be nicer. */ | |
8e8901c5 VP |
970 | |
971 | static void | |
972 | info_threads_command (char *arg, int from_tty) | |
973 | { | |
aea5b279 | 974 | print_thread_info (uiout, arg, -1); |
8e8901c5 VP |
975 | } |
976 | ||
c378eb4e | 977 | /* Switch from one thread to another. */ |
c906108c | 978 | |
6a6b96b9 | 979 | void |
39f77062 | 980 | switch_to_thread (ptid_t ptid) |
c906108c | 981 | { |
6c95b8df PA |
982 | /* Switch the program space as well, if we can infer it from the now |
983 | current thread. Otherwise, it's up to the caller to select the | |
984 | space it wants. */ | |
985 | if (!ptid_equal (ptid, null_ptid)) | |
986 | { | |
987 | struct inferior *inf; | |
988 | ||
989 | inf = find_inferior_pid (ptid_get_pid (ptid)); | |
990 | gdb_assert (inf != NULL); | |
991 | set_current_program_space (inf->pspace); | |
992 | set_current_inferior (inf); | |
993 | } | |
994 | ||
39f77062 | 995 | if (ptid_equal (ptid, inferior_ptid)) |
c906108c SS |
996 | return; |
997 | ||
39f77062 | 998 | inferior_ptid = ptid; |
35f196d9 | 999 | reinit_frame_cache (); |
c906108c | 1000 | registers_changed (); |
94cc34af | 1001 | |
4f8d22e3 PA |
1002 | /* We don't check for is_stopped, because we're called at times |
1003 | while in the TARGET_RUNNING state, e.g., while handling an | |
1004 | internal event. */ | |
d729566a PA |
1005 | if (!ptid_equal (inferior_ptid, null_ptid) |
1006 | && !is_exited (ptid) | |
1007 | && !is_executing (ptid)) | |
fb14de7b | 1008 | stop_pc = regcache_read_pc (get_thread_regcache (ptid)); |
94cc34af PA |
1009 | else |
1010 | stop_pc = ~(CORE_ADDR) 0; | |
c906108c SS |
1011 | } |
1012 | ||
1013 | static void | |
39f77062 | 1014 | restore_current_thread (ptid_t ptid) |
c906108c | 1015 | { |
dcf4fbde | 1016 | switch_to_thread (ptid); |
99b3d574 DP |
1017 | } |
1018 | ||
1019 | static void | |
4f8d22e3 | 1020 | restore_selected_frame (struct frame_id a_frame_id, int frame_level) |
99b3d574 | 1021 | { |
4f8d22e3 PA |
1022 | struct frame_info *frame = NULL; |
1023 | int count; | |
1024 | ||
eb8c0621 TT |
1025 | /* This means there was no selected frame. */ |
1026 | if (frame_level == -1) | |
1027 | { | |
1028 | select_frame (NULL); | |
1029 | return; | |
1030 | } | |
1031 | ||
4f8d22e3 PA |
1032 | gdb_assert (frame_level >= 0); |
1033 | ||
1034 | /* Restore by level first, check if the frame id is the same as | |
1035 | expected. If that fails, try restoring by frame id. If that | |
1036 | fails, nothing to do, just warn the user. */ | |
1037 | ||
1038 | count = frame_level; | |
1039 | frame = find_relative_frame (get_current_frame (), &count); | |
1040 | if (count == 0 | |
1041 | && frame != NULL | |
005ca36a JB |
1042 | /* The frame ids must match - either both valid or both outer_frame_id. |
1043 | The latter case is not failsafe, but since it's highly unlikely | |
4f8d22e3 PA |
1044 | the search by level finds the wrong frame, it's 99.9(9)% of |
1045 | the time (for all practical purposes) safe. */ | |
005ca36a | 1046 | && frame_id_eq (get_frame_id (frame), a_frame_id)) |
4f8d22e3 PA |
1047 | { |
1048 | /* Cool, all is fine. */ | |
1049 | select_frame (frame); | |
1050 | return; | |
1051 | } | |
99b3d574 | 1052 | |
4f8d22e3 PA |
1053 | frame = frame_find_by_id (a_frame_id); |
1054 | if (frame != NULL) | |
1055 | { | |
1056 | /* Cool, refound it. */ | |
1057 | select_frame (frame); | |
1058 | return; | |
1059 | } | |
99b3d574 | 1060 | |
0c501536 PA |
1061 | /* Nothing else to do, the frame layout really changed. Select the |
1062 | innermost stack frame. */ | |
1063 | select_frame (get_current_frame ()); | |
1064 | ||
1065 | /* Warn the user. */ | |
6c95b8df | 1066 | if (frame_level > 0 && !ui_out_is_mi_like_p (uiout)) |
99b3d574 | 1067 | { |
3e43a32a MS |
1068 | warning (_("Couldn't restore frame #%d in " |
1069 | "current thread, at reparsed frame #0\n"), | |
4f8d22e3 PA |
1070 | frame_level); |
1071 | /* For MI, we should probably have a notification about | |
1072 | current frame change. But this error is not very | |
1073 | likely, so don't bother for now. */ | |
0c501536 | 1074 | print_stack_frame (get_selected_frame (NULL), 1, SRC_LINE); |
c906108c SS |
1075 | } |
1076 | } | |
1077 | ||
6ecce94d AC |
1078 | struct current_thread_cleanup |
1079 | { | |
39f77062 | 1080 | ptid_t inferior_ptid; |
99b3d574 | 1081 | struct frame_id selected_frame_id; |
4f8d22e3 PA |
1082 | int selected_frame_level; |
1083 | int was_stopped; | |
6c95b8df | 1084 | int inf_id; |
6ecce94d AC |
1085 | }; |
1086 | ||
1087 | static void | |
1088 | do_restore_current_thread_cleanup (void *arg) | |
1089 | { | |
4f8d22e3 | 1090 | struct thread_info *tp; |
6ecce94d | 1091 | struct current_thread_cleanup *old = arg; |
d729566a | 1092 | |
e09875d4 | 1093 | tp = find_thread_ptid (old->inferior_ptid); |
d729566a PA |
1094 | |
1095 | /* If the previously selected thread belonged to a process that has | |
1096 | in the mean time been deleted (due to normal exit, detach, etc.), | |
1097 | then don't revert back to it, but instead simply drop back to no | |
1098 | thread selected. */ | |
1099 | if (tp | |
88fc996f | 1100 | && find_inferior_pid (ptid_get_pid (tp->ptid)) != NULL) |
d729566a | 1101 | restore_current_thread (old->inferior_ptid); |
88fc996f | 1102 | else |
6c95b8df PA |
1103 | { |
1104 | restore_current_thread (null_ptid); | |
1105 | set_current_inferior (find_inferior_id (old->inf_id)); | |
1106 | } | |
94cc34af | 1107 | |
4f8d22e3 PA |
1108 | /* The running state of the originally selected thread may have |
1109 | changed, so we have to recheck it here. */ | |
d729566a PA |
1110 | if (!ptid_equal (inferior_ptid, null_ptid) |
1111 | && old->was_stopped | |
4f8d22e3 PA |
1112 | && is_stopped (inferior_ptid) |
1113 | && target_has_registers | |
1114 | && target_has_stack | |
1115 | && target_has_memory) | |
1116 | restore_selected_frame (old->selected_frame_id, | |
1117 | old->selected_frame_level); | |
1118 | } | |
1119 | ||
1120 | static void | |
1121 | restore_current_thread_cleanup_dtor (void *arg) | |
1122 | { | |
1123 | struct current_thread_cleanup *old = arg; | |
1124 | struct thread_info *tp; | |
5d502164 | 1125 | |
e09875d4 | 1126 | tp = find_thread_ptid (old->inferior_ptid); |
4f8d22e3 PA |
1127 | if (tp) |
1128 | tp->refcount--; | |
b8c9b27d | 1129 | xfree (old); |
6ecce94d AC |
1130 | } |
1131 | ||
6208b47d | 1132 | struct cleanup * |
4f8d22e3 | 1133 | make_cleanup_restore_current_thread (void) |
6ecce94d | 1134 | { |
4f8d22e3 PA |
1135 | struct thread_info *tp; |
1136 | struct frame_info *frame; | |
1137 | struct current_thread_cleanup *old; | |
1138 | ||
1139 | old = xmalloc (sizeof (struct current_thread_cleanup)); | |
39f77062 | 1140 | old->inferior_ptid = inferior_ptid; |
6c95b8df | 1141 | old->inf_id = current_inferior ()->num; |
4f8d22e3 | 1142 | |
d729566a PA |
1143 | if (!ptid_equal (inferior_ptid, null_ptid)) |
1144 | { | |
1145 | old->was_stopped = is_stopped (inferior_ptid); | |
1146 | if (old->was_stopped | |
1147 | && target_has_registers | |
1148 | && target_has_stack | |
1149 | && target_has_memory) | |
eb8c0621 TT |
1150 | { |
1151 | /* When processing internal events, there might not be a | |
1152 | selected frame. If we naively call get_selected_frame | |
1153 | here, then we can end up reading debuginfo for the | |
1154 | current frame, but we don't generally need the debuginfo | |
1155 | at this point. */ | |
1156 | frame = get_selected_frame_if_set (); | |
1157 | } | |
d729566a PA |
1158 | else |
1159 | frame = NULL; | |
4f8d22e3 | 1160 | |
d729566a PA |
1161 | old->selected_frame_id = get_frame_id (frame); |
1162 | old->selected_frame_level = frame_relative_level (frame); | |
1163 | ||
e09875d4 | 1164 | tp = find_thread_ptid (inferior_ptid); |
d729566a PA |
1165 | if (tp) |
1166 | tp->refcount++; | |
1167 | } | |
4f8d22e3 PA |
1168 | |
1169 | return make_cleanup_dtor (do_restore_current_thread_cleanup, old, | |
1170 | restore_current_thread_cleanup_dtor); | |
6ecce94d AC |
1171 | } |
1172 | ||
c906108c SS |
1173 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
1174 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist | |
1175 | of two numbers seperated by a hyphen. Examples: | |
1176 | ||
c5aa993b JM |
1177 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
1178 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 | |
c378eb4e | 1179 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */ |
c906108c SS |
1180 | |
1181 | static void | |
fba45db2 | 1182 | thread_apply_all_command (char *cmd, int from_tty) |
c906108c SS |
1183 | { |
1184 | struct thread_info *tp; | |
4f8d22e3 | 1185 | struct cleanup *old_chain; |
e35ce267 | 1186 | char *saved_cmd; |
c906108c SS |
1187 | |
1188 | if (cmd == NULL || *cmd == '\000') | |
8a3fe4f8 | 1189 | error (_("Please specify a command following the thread ID list")); |
94cc34af | 1190 | |
dc146f7c | 1191 | update_thread_list (); |
e9d196c5 | 1192 | |
4f8d22e3 PA |
1193 | old_chain = make_cleanup_restore_current_thread (); |
1194 | ||
e35ce267 | 1195 | /* Save a copy of the command in case it is clobbered by |
c378eb4e | 1196 | execute_command. */ |
5b616ba1 | 1197 | saved_cmd = xstrdup (cmd); |
94cc34af | 1198 | make_cleanup (xfree, saved_cmd); |
c906108c SS |
1199 | for (tp = thread_list; tp; tp = tp->next) |
1200 | if (thread_alive (tp)) | |
1201 | { | |
dcf4fbde | 1202 | switch_to_thread (tp->ptid); |
94cc34af | 1203 | |
a3f17187 | 1204 | printf_filtered (_("\nThread %d (%s):\n"), |
54ba13f7 | 1205 | tp->num, target_pid_to_str (inferior_ptid)); |
c906108c | 1206 | execute_command (cmd, from_tty); |
3e43a32a MS |
1207 | strcpy (cmd, saved_cmd); /* Restore exact command used |
1208 | previously. */ | |
c906108c | 1209 | } |
6ecce94d AC |
1210 | |
1211 | do_cleanups (old_chain); | |
c906108c SS |
1212 | } |
1213 | ||
1214 | static void | |
fba45db2 | 1215 | thread_apply_command (char *tidlist, int from_tty) |
c906108c SS |
1216 | { |
1217 | char *cmd; | |
c906108c | 1218 | struct cleanup *old_chain; |
e35ce267 | 1219 | char *saved_cmd; |
197f0a60 | 1220 | struct get_number_or_range_state state; |
c906108c SS |
1221 | |
1222 | if (tidlist == NULL || *tidlist == '\000') | |
8a3fe4f8 | 1223 | error (_("Please specify a thread ID list")); |
c906108c | 1224 | |
c5aa993b | 1225 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
c906108c SS |
1226 | |
1227 | if (*cmd == '\000') | |
8a3fe4f8 | 1228 | error (_("Please specify a command following the thread ID list")); |
c906108c | 1229 | |
e35ce267 | 1230 | /* Save a copy of the command in case it is clobbered by |
c378eb4e | 1231 | execute_command. */ |
5b616ba1 | 1232 | saved_cmd = xstrdup (cmd); |
4f8d22e3 | 1233 | old_chain = make_cleanup (xfree, saved_cmd); |
197f0a60 TT |
1234 | |
1235 | init_number_or_range (&state, tidlist); | |
1236 | while (!state.finished && state.string < cmd) | |
c906108c SS |
1237 | { |
1238 | struct thread_info *tp; | |
65ebfb52 MS |
1239 | int start; |
1240 | char *p = tidlist; | |
c906108c | 1241 | |
197f0a60 | 1242 | start = get_number_or_range (&state); |
c906108c | 1243 | |
65fc9b77 PA |
1244 | make_cleanup_restore_current_thread (); |
1245 | ||
65ebfb52 | 1246 | tp = find_thread_id (start); |
c906108c | 1247 | |
65ebfb52 MS |
1248 | if (!tp) |
1249 | warning (_("Unknown thread %d."), start); | |
1250 | else if (!thread_alive (tp)) | |
1251 | warning (_("Thread %d has terminated."), start); | |
1252 | else | |
1253 | { | |
1254 | switch_to_thread (tp->ptid); | |
4f8d22e3 | 1255 | |
65ebfb52 MS |
1256 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
1257 | target_pid_to_str (inferior_ptid)); | |
1258 | execute_command (cmd, from_tty); | |
4f8d22e3 | 1259 | |
65ebfb52 MS |
1260 | /* Restore exact command used previously. */ |
1261 | strcpy (cmd, saved_cmd); | |
c906108c SS |
1262 | } |
1263 | } | |
6ecce94d AC |
1264 | |
1265 | do_cleanups (old_chain); | |
c906108c SS |
1266 | } |
1267 | ||
1268 | /* Switch to the specified thread. Will dispatch off to thread_apply_command | |
1269 | if prefix of arg is `apply'. */ | |
1270 | ||
1271 | static void | |
fba45db2 | 1272 | thread_command (char *tidstr, int from_tty) |
c906108c | 1273 | { |
c906108c SS |
1274 | if (!tidstr) |
1275 | { | |
d729566a PA |
1276 | if (ptid_equal (inferior_ptid, null_ptid)) |
1277 | error (_("No thread selected")); | |
1278 | ||
c906108c | 1279 | if (target_has_stack) |
4f8d22e3 PA |
1280 | { |
1281 | if (is_exited (inferior_ptid)) | |
1282 | printf_filtered (_("[Current thread is %d (%s) (exited)]\n"), | |
1283 | pid_to_thread_id (inferior_ptid), | |
54ba13f7 | 1284 | target_pid_to_str (inferior_ptid)); |
4f8d22e3 PA |
1285 | else |
1286 | printf_filtered (_("[Current thread is %d (%s)]\n"), | |
1287 | pid_to_thread_id (inferior_ptid), | |
54ba13f7 | 1288 | target_pid_to_str (inferior_ptid)); |
4f8d22e3 | 1289 | } |
c906108c | 1290 | else |
8a3fe4f8 | 1291 | error (_("No stack.")); |
c906108c SS |
1292 | return; |
1293 | } | |
c5394b80 | 1294 | |
ce43223b | 1295 | gdb_thread_select (uiout, tidstr, NULL); |
c5394b80 JM |
1296 | } |
1297 | ||
4694da01 TT |
1298 | /* Implementation of `thread name'. */ |
1299 | ||
1300 | static void | |
1301 | thread_name_command (char *arg, int from_tty) | |
1302 | { | |
1303 | struct thread_info *info; | |
1304 | ||
1305 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1306 | error (_("No thread selected")); | |
1307 | ||
1308 | while (arg && isspace (*arg)) | |
1309 | ++arg; | |
1310 | ||
1311 | info = inferior_thread (); | |
1312 | xfree (info->name); | |
1313 | info->name = arg ? xstrdup (arg) : NULL; | |
1314 | } | |
1315 | ||
60f98dde MS |
1316 | /* Find thread ids with a name, target pid, or extra info matching ARG. */ |
1317 | ||
1318 | static void | |
1319 | thread_find_command (char *arg, int from_tty) | |
1320 | { | |
1321 | struct thread_info *tp; | |
1322 | char *tmp; | |
1323 | unsigned long match = 0; | |
1324 | ||
1325 | if (arg == NULL || *arg == '\0') | |
1326 | error (_("Command requires an argument.")); | |
1327 | ||
1328 | tmp = re_comp (arg); | |
1329 | if (tmp != 0) | |
1330 | error (_("Invalid regexp (%s): %s"), tmp, arg); | |
1331 | ||
1332 | update_thread_list (); | |
1333 | for (tp = thread_list; tp; tp = tp->next) | |
1334 | { | |
1335 | if (tp->name != NULL && re_exec (tp->name)) | |
1336 | { | |
1337 | printf_filtered (_("Thread %d has name '%s'\n"), | |
1338 | tp->num, tp->name); | |
1339 | match++; | |
1340 | } | |
1341 | ||
1342 | tmp = target_thread_name (tp); | |
1343 | if (tmp != NULL && re_exec (tmp)) | |
1344 | { | |
1345 | printf_filtered (_("Thread %d has target name '%s'\n"), | |
1346 | tp->num, tmp); | |
1347 | match++; | |
1348 | } | |
1349 | ||
1350 | tmp = target_pid_to_str (tp->ptid); | |
1351 | if (tmp != NULL && re_exec (tmp)) | |
1352 | { | |
1353 | printf_filtered (_("Thread %d has target id '%s'\n"), | |
1354 | tp->num, tmp); | |
1355 | match++; | |
1356 | } | |
1357 | ||
1358 | tmp = target_extra_thread_info (tp); | |
1359 | if (tmp != NULL && re_exec (tmp)) | |
1360 | { | |
1361 | printf_filtered (_("Thread %d has extra info '%s'\n"), | |
1362 | tp->num, tmp); | |
1363 | match++; | |
1364 | } | |
1365 | } | |
1366 | if (!match) | |
1367 | printf_filtered (_("No threads match '%s'\n"), arg); | |
1368 | } | |
1369 | ||
93815fbf VP |
1370 | /* Print notices when new threads are attached and detached. */ |
1371 | int print_thread_events = 1; | |
1372 | static void | |
1373 | show_print_thread_events (struct ui_file *file, int from_tty, | |
1374 | struct cmd_list_element *c, const char *value) | |
1375 | { | |
3e43a32a MS |
1376 | fprintf_filtered (file, |
1377 | _("Printing of thread events is %s.\n"), | |
93815fbf VP |
1378 | value); |
1379 | } | |
1380 | ||
c5394b80 | 1381 | static int |
6949171e | 1382 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
c5394b80 JM |
1383 | { |
1384 | int num; | |
1385 | struct thread_info *tp; | |
1386 | ||
81490ea1 | 1387 | num = value_as_long (parse_and_eval (tidstr)); |
c906108c SS |
1388 | |
1389 | tp = find_thread_id (num); | |
1390 | ||
8b93c638 | 1391 | if (!tp) |
8a3fe4f8 | 1392 | error (_("Thread ID %d not known."), num); |
c906108c SS |
1393 | |
1394 | if (!thread_alive (tp)) | |
8a3fe4f8 | 1395 | error (_("Thread ID %d has terminated."), num); |
c906108c | 1396 | |
dcf4fbde | 1397 | switch_to_thread (tp->ptid); |
c906108c | 1398 | |
db5a7484 NR |
1399 | annotate_thread_changed (); |
1400 | ||
8b93c638 | 1401 | ui_out_text (uiout, "[Switching to thread "); |
39f77062 | 1402 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
8b93c638 | 1403 | ui_out_text (uiout, " ("); |
54ba13f7 | 1404 | ui_out_text (uiout, target_pid_to_str (inferior_ptid)); |
8b93c638 | 1405 | ui_out_text (uiout, ")]"); |
c5394b80 | 1406 | |
4f8d22e3 PA |
1407 | /* Note that we can't reach this with an exited thread, due to the |
1408 | thread_alive check above. */ | |
1409 | if (tp->state_ == THREAD_RUNNING) | |
94cc34af | 1410 | ui_out_text (uiout, "(running)\n"); |
4f8d22e3 | 1411 | else |
98871305 TT |
1412 | { |
1413 | ui_out_text (uiout, "\n"); | |
1414 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
1415 | } | |
4f8d22e3 PA |
1416 | |
1417 | /* Since the current thread may have changed, see if there is any | |
1418 | exited thread we can now delete. */ | |
1419 | prune_threads (); | |
94cc34af | 1420 | |
c5394b80 JM |
1421 | return GDB_RC_OK; |
1422 | } | |
1423 | ||
1424 | enum gdb_rc | |
ce43223b | 1425 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
c5394b80 | 1426 | { |
b0b13bb4 DJ |
1427 | if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
1428 | error_message, RETURN_MASK_ALL) < 0) | |
1429 | return GDB_RC_FAIL; | |
1430 | return GDB_RC_OK; | |
c906108c SS |
1431 | } |
1432 | ||
dc146f7c VP |
1433 | void |
1434 | update_thread_list (void) | |
1435 | { | |
1436 | prune_threads (); | |
1437 | target_find_new_threads (); | |
1438 | } | |
1439 | ||
6aed2dbc SS |
1440 | /* Return a new value for the selected thread's id. Return a value of 0 if |
1441 | no thread is selected, or no threads exist. */ | |
1442 | ||
1443 | static struct value * | |
1444 | thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var) | |
1445 | { | |
1446 | struct thread_info *tp = find_thread_ptid (inferior_ptid); | |
1447 | ||
1448 | return value_from_longest (builtin_type (gdbarch)->builtin_int, | |
1449 | (tp ? tp->num : 0)); | |
1450 | } | |
1451 | ||
c906108c SS |
1452 | /* Commands with a prefix of `thread'. */ |
1453 | struct cmd_list_element *thread_cmd_list = NULL; | |
1454 | ||
1455 | void | |
fba45db2 | 1456 | _initialize_thread (void) |
c906108c SS |
1457 | { |
1458 | static struct cmd_list_element *thread_apply_list = NULL; | |
c906108c | 1459 | |
60f98dde MS |
1460 | add_info ("threads", info_threads_command, |
1461 | _("Display currently known threads.\n\ | |
1462 | Usage: info threads [ID]...\n\ | |
1463 | Optional arguments are thread IDs with spaces between.\n\ | |
1464 | If no arguments, all threads are displayed.")); | |
c906108c | 1465 | |
d729566a | 1466 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
1bedd215 AC |
1467 | Use this command to switch between threads.\n\ |
1468 | The new thread ID must be currently known."), | |
d729566a | 1469 | &thread_cmd_list, "thread ", 1, &cmdlist); |
c906108c | 1470 | |
d729566a PA |
1471 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
1472 | _("Apply a command to a list of threads."), | |
1473 | &thread_apply_list, "thread apply ", 1, &thread_cmd_list); | |
c906108c | 1474 | |
d729566a PA |
1475 | add_cmd ("all", class_run, thread_apply_all_command, |
1476 | _("Apply a command to all threads."), &thread_apply_list); | |
c906108c | 1477 | |
4694da01 TT |
1478 | add_cmd ("name", class_run, thread_name_command, |
1479 | _("Set the current thread's name.\n\ | |
1480 | Usage: thread name [NAME]\n\ | |
1481 | If NAME is not given, then any existing name is removed."), &thread_cmd_list); | |
1482 | ||
60f98dde MS |
1483 | add_cmd ("find", class_run, thread_find_command, _("\ |
1484 | Find threads that match a regular expression.\n\ | |
1485 | Usage: thread find REGEXP\n\ | |
1486 | Will display thread ids whose name, target ID, or extra info matches REGEXP."), | |
1487 | &thread_cmd_list); | |
1488 | ||
c906108c SS |
1489 | if (!xdb_commands) |
1490 | add_com_alias ("t", "thread", class_run, 1); | |
93815fbf VP |
1491 | |
1492 | add_setshow_boolean_cmd ("thread-events", no_class, | |
1493 | &print_thread_events, _("\ | |
11c68c47 EZ |
1494 | Set printing of thread events (such as thread start and exit)."), _("\ |
1495 | Show printing of thread events (such as thread start and exit)."), NULL, | |
93815fbf VP |
1496 | NULL, |
1497 | show_print_thread_events, | |
1498 | &setprintlist, &showprintlist); | |
6aed2dbc SS |
1499 | |
1500 | create_internalvar_type_lazy ("_thread", thread_id_make_value); | |
c906108c | 1501 | } |