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 | |
a5321aa4 | 69 | struct thread_info* |
4e1c45ea | 70 | inferior_thread (void) |
8601f500 | 71 | { |
e09875d4 | 72 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
4e1c45ea PA |
73 | gdb_assert (tp); |
74 | return tp; | |
75 | } | |
8601f500 | 76 | |
4e1c45ea PA |
77 | void |
78 | delete_step_resume_breakpoint (struct thread_info *tp) | |
79 | { | |
8358c15c | 80 | if (tp && tp->control.step_resume_breakpoint) |
8601f500 | 81 | { |
8358c15c JK |
82 | delete_breakpoint (tp->control.step_resume_breakpoint); |
83 | tp->control.step_resume_breakpoint = NULL; | |
8601f500 MS |
84 | } |
85 | } | |
86 | ||
186c406b TT |
87 | void |
88 | delete_exception_resume_breakpoint (struct thread_info *tp) | |
89 | { | |
90 | if (tp && tp->control.exception_resume_breakpoint) | |
91 | { | |
92 | delete_breakpoint (tp->control.exception_resume_breakpoint); | |
93 | tp->control.exception_resume_breakpoint = NULL; | |
94 | } | |
95 | } | |
96 | ||
7c952b6d | 97 | static void |
4f8d22e3 | 98 | clear_thread_inferior_resources (struct thread_info *tp) |
7c952b6d ND |
99 | { |
100 | /* NOTE: this will take care of any left-over step_resume breakpoints, | |
4d8453a5 DJ |
101 | but not any user-specified thread-specific breakpoints. We can not |
102 | delete the breakpoint straight-off, because the inferior might not | |
103 | be stopped at the moment. */ | |
8358c15c | 104 | if (tp->control.step_resume_breakpoint) |
4f8d22e3 | 105 | { |
8358c15c JK |
106 | tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop; |
107 | tp->control.step_resume_breakpoint = NULL; | |
4f8d22e3 | 108 | } |
7c952b6d | 109 | |
186c406b TT |
110 | if (tp->control.exception_resume_breakpoint) |
111 | { | |
112 | tp->control.exception_resume_breakpoint->disposition | |
113 | = disp_del_at_next_stop; | |
114 | tp->control.exception_resume_breakpoint = NULL; | |
115 | } | |
116 | ||
16c381f0 | 117 | bpstat_clear (&tp->control.stop_bpstat); |
95e54da7 | 118 | |
fa4cd53f PA |
119 | do_all_intermediate_continuations_thread (tp, 1); |
120 | do_all_continuations_thread (tp, 1); | |
186c406b TT |
121 | |
122 | delete_longjmp_breakpoint (tp->num); | |
4f8d22e3 PA |
123 | } |
124 | ||
125 | static void | |
126 | free_thread (struct thread_info *tp) | |
127 | { | |
7c952b6d | 128 | if (tp->private) |
dc146f7c VP |
129 | { |
130 | if (tp->private_dtor) | |
131 | tp->private_dtor (tp->private); | |
132 | else | |
133 | xfree (tp->private); | |
134 | } | |
7c952b6d | 135 | |
4694da01 | 136 | xfree (tp->name); |
b8c9b27d | 137 | xfree (tp); |
7c952b6d ND |
138 | } |
139 | ||
c906108c | 140 | void |
fba45db2 | 141 | init_thread_list (void) |
c906108c SS |
142 | { |
143 | struct thread_info *tp, *tpnext; | |
144 | ||
7c952b6d | 145 | highest_thread_num = 0; |
8ea051c5 | 146 | |
c906108c SS |
147 | if (!thread_list) |
148 | return; | |
149 | ||
150 | for (tp = thread_list; tp; tp = tpnext) | |
151 | { | |
152 | tpnext = tp->next; | |
7c952b6d | 153 | free_thread (tp); |
c906108c SS |
154 | } |
155 | ||
156 | thread_list = NULL; | |
c906108c SS |
157 | } |
158 | ||
e58b0e63 PA |
159 | /* Allocate a new thread with target id PTID and add it to the thread |
160 | list. */ | |
161 | ||
162 | static struct thread_info * | |
163 | new_thread (ptid_t ptid) | |
164 | { | |
165 | struct thread_info *tp; | |
166 | ||
167 | tp = xcalloc (1, sizeof (*tp)); | |
168 | ||
169 | tp->ptid = ptid; | |
170 | tp->num = ++highest_thread_num; | |
171 | tp->next = thread_list; | |
172 | thread_list = tp; | |
173 | ||
174 | /* Nothing to follow yet. */ | |
175 | tp->pending_follow.kind = TARGET_WAITKIND_SPURIOUS; | |
30596231 | 176 | tp->state = THREAD_STOPPED; |
e58b0e63 PA |
177 | |
178 | return tp; | |
179 | } | |
180 | ||
0d06e24b | 181 | struct thread_info * |
93815fbf | 182 | add_thread_silent (ptid_t ptid) |
c906108c SS |
183 | { |
184 | struct thread_info *tp; | |
185 | ||
e09875d4 | 186 | tp = find_thread_ptid (ptid); |
4f8d22e3 PA |
187 | if (tp) |
188 | /* Found an old thread with the same id. It has to be dead, | |
189 | otherwise we wouldn't be adding a new thread with the same id. | |
190 | The OS is reusing this id --- delete it, and recreate a new | |
191 | one. */ | |
192 | { | |
193 | /* In addition to deleting the thread, if this is the current | |
dcf4fbde PA |
194 | thread, then we need to take care that delete_thread doesn't |
195 | really delete the thread if it is inferior_ptid. Create a | |
196 | new template thread in the list with an invalid ptid, switch | |
197 | to it, delete the original thread, reset the new thread's | |
198 | ptid, and switch to it. */ | |
4f8d22e3 PA |
199 | |
200 | if (ptid_equal (inferior_ptid, ptid)) | |
201 | { | |
c820c52a | 202 | tp = new_thread (null_ptid); |
dcf4fbde PA |
203 | |
204 | /* Make switch_to_thread not read from the thread. */ | |
30596231 | 205 | tp->state = THREAD_EXITED; |
c820c52a | 206 | switch_to_thread (null_ptid); |
4f8d22e3 PA |
207 | |
208 | /* Now we can delete it. */ | |
209 | delete_thread (ptid); | |
210 | ||
dcf4fbde | 211 | /* Now reset its ptid, and reswitch inferior_ptid to it. */ |
4f8d22e3 | 212 | tp->ptid = ptid; |
30596231 | 213 | tp->state = THREAD_STOPPED; |
4f8d22e3 PA |
214 | switch_to_thread (ptid); |
215 | ||
216 | observer_notify_new_thread (tp); | |
217 | ||
218 | /* All done. */ | |
219 | return tp; | |
220 | } | |
221 | else | |
222 | /* Just go ahead and delete it. */ | |
223 | delete_thread (ptid); | |
224 | } | |
225 | ||
e58b0e63 | 226 | tp = new_thread (ptid); |
cfc01461 VP |
227 | observer_notify_new_thread (tp); |
228 | ||
0d06e24b | 229 | return tp; |
c906108c SS |
230 | } |
231 | ||
93815fbf | 232 | struct thread_info * |
17faa917 | 233 | add_thread_with_info (ptid_t ptid, struct private_thread_info *private) |
93815fbf VP |
234 | { |
235 | struct thread_info *result = add_thread_silent (ptid); | |
236 | ||
17faa917 DJ |
237 | result->private = private; |
238 | ||
93815fbf | 239 | if (print_thread_events) |
fd532e2e | 240 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
d4fc5b1e NR |
241 | |
242 | annotate_new_thread (); | |
93815fbf VP |
243 | return result; |
244 | } | |
245 | ||
17faa917 DJ |
246 | struct thread_info * |
247 | add_thread (ptid_t ptid) | |
248 | { | |
249 | return add_thread_with_info (ptid, NULL); | |
250 | } | |
251 | ||
5e0b29c1 PA |
252 | /* Delete thread PTID. If SILENT, don't notify the observer of this |
253 | exit. */ | |
254 | static void | |
255 | delete_thread_1 (ptid_t ptid, int silent) | |
c906108c SS |
256 | { |
257 | struct thread_info *tp, *tpprev; | |
258 | ||
259 | tpprev = NULL; | |
260 | ||
261 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) | |
39f77062 | 262 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
263 | break; |
264 | ||
265 | if (!tp) | |
266 | return; | |
267 | ||
4f8d22e3 PA |
268 | /* If this is the current thread, or there's code out there that |
269 | relies on it existing (refcount > 0) we can't delete yet. Mark | |
270 | it as exited, and notify it. */ | |
271 | if (tp->refcount > 0 | |
272 | || ptid_equal (tp->ptid, inferior_ptid)) | |
273 | { | |
30596231 | 274 | if (tp->state != THREAD_EXITED) |
4f8d22e3 | 275 | { |
a07daef3 | 276 | observer_notify_thread_exit (tp, silent); |
4f8d22e3 PA |
277 | |
278 | /* Tag it as exited. */ | |
30596231 | 279 | tp->state = THREAD_EXITED; |
4f8d22e3 PA |
280 | |
281 | /* Clear breakpoints, etc. associated with this thread. */ | |
282 | clear_thread_inferior_resources (tp); | |
283 | } | |
284 | ||
285 | /* Will be really deleted some other time. */ | |
286 | return; | |
287 | } | |
288 | ||
fa4cd53f | 289 | /* Notify thread exit, but only if we haven't already. */ |
30596231 | 290 | if (tp->state != THREAD_EXITED) |
fa4cd53f PA |
291 | observer_notify_thread_exit (tp, silent); |
292 | ||
293 | /* Tag it as exited. */ | |
30596231 | 294 | tp->state = THREAD_EXITED; |
fa4cd53f PA |
295 | clear_thread_inferior_resources (tp); |
296 | ||
c906108c SS |
297 | if (tpprev) |
298 | tpprev->next = tp->next; | |
299 | else | |
300 | thread_list = tp->next; | |
301 | ||
7c952b6d | 302 | free_thread (tp); |
c906108c SS |
303 | } |
304 | ||
4f8d22e3 PA |
305 | /* Delete thread PTID and notify of thread exit. If this is |
306 | inferior_ptid, don't actually delete it, but tag it as exited and | |
307 | do the notification. If PTID is the user selected thread, clear | |
308 | it. */ | |
5e0b29c1 PA |
309 | void |
310 | delete_thread (ptid_t ptid) | |
311 | { | |
312 | delete_thread_1 (ptid, 0 /* not silent */); | |
313 | } | |
314 | ||
315 | void | |
316 | delete_thread_silent (ptid_t ptid) | |
317 | { | |
318 | delete_thread_1 (ptid, 1 /* silent */); | |
319 | } | |
320 | ||
1e92afda | 321 | struct thread_info * |
fba45db2 | 322 | find_thread_id (int num) |
c906108c SS |
323 | { |
324 | struct thread_info *tp; | |
325 | ||
326 | for (tp = thread_list; tp; tp = tp->next) | |
327 | if (tp->num == num) | |
328 | return tp; | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
39f77062 | 333 | /* Find a thread_info by matching PTID. */ |
0d06e24b | 334 | struct thread_info * |
e09875d4 | 335 | find_thread_ptid (ptid_t ptid) |
0d06e24b JM |
336 | { |
337 | struct thread_info *tp; | |
338 | ||
339 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 340 | if (ptid_equal (tp->ptid, ptid)) |
0d06e24b JM |
341 | return tp; |
342 | ||
343 | return NULL; | |
344 | } | |
345 | ||
346 | /* | |
347 | * Thread iterator function. | |
348 | * | |
349 | * Calls a callback function once for each thread, so long as | |
350 | * the callback function returns false. If the callback function | |
351 | * returns true, the iteration will end and the current thread | |
352 | * will be returned. This can be useful for implementing a | |
353 | * search for a thread with arbitrary attributes, or for applying | |
354 | * some operation to every thread. | |
355 | * | |
356 | * FIXME: some of the existing functionality, such as | |
357 | * "Thread apply all", might be rewritten using this functionality. | |
358 | */ | |
359 | ||
360 | struct thread_info * | |
fd118b61 KB |
361 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
362 | void *data) | |
0d06e24b | 363 | { |
4f8d22e3 | 364 | struct thread_info *tp, *next; |
0d06e24b | 365 | |
4f8d22e3 PA |
366 | for (tp = thread_list; tp; tp = next) |
367 | { | |
368 | next = tp->next; | |
369 | if ((*callback) (tp, data)) | |
370 | return tp; | |
371 | } | |
0d06e24b JM |
372 | |
373 | return NULL; | |
374 | } | |
375 | ||
20874c92 VP |
376 | int |
377 | thread_count (void) | |
378 | { | |
379 | int result = 0; | |
380 | struct thread_info *tp; | |
381 | ||
382 | for (tp = thread_list; tp; tp = tp->next) | |
383 | ++result; | |
384 | ||
385 | return result; | |
386 | } | |
387 | ||
c906108c | 388 | int |
fba45db2 | 389 | valid_thread_id (int num) |
c906108c SS |
390 | { |
391 | struct thread_info *tp; | |
392 | ||
393 | for (tp = thread_list; tp; tp = tp->next) | |
394 | if (tp->num == num) | |
395 | return 1; | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | int | |
39f77062 | 401 | pid_to_thread_id (ptid_t ptid) |
c906108c SS |
402 | { |
403 | struct thread_info *tp; | |
404 | ||
405 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 406 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
407 | return tp->num; |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
39f77062 | 412 | ptid_t |
fba45db2 | 413 | thread_id_to_pid (int num) |
c906108c SS |
414 | { |
415 | struct thread_info *thread = find_thread_id (num); | |
5d502164 | 416 | |
c906108c | 417 | if (thread) |
39f77062 | 418 | return thread->ptid; |
c906108c | 419 | else |
39f77062 | 420 | return pid_to_ptid (-1); |
c906108c SS |
421 | } |
422 | ||
423 | int | |
39f77062 | 424 | in_thread_list (ptid_t ptid) |
c906108c SS |
425 | { |
426 | struct thread_info *tp; | |
427 | ||
428 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 429 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
430 | return 1; |
431 | ||
c378eb4e | 432 | return 0; /* Never heard of 'im. */ |
c906108c | 433 | } |
8926118c | 434 | |
bad34192 PA |
435 | /* Finds the first thread of the inferior given by PID. If PID is -1, |
436 | return the first thread in the list. */ | |
437 | ||
438 | struct thread_info * | |
439 | first_thread_of_process (int pid) | |
440 | { | |
441 | struct thread_info *tp, *ret = NULL; | |
442 | ||
443 | for (tp = thread_list; tp; tp = tp->next) | |
444 | if (pid == -1 || ptid_get_pid (tp->ptid) == pid) | |
445 | if (ret == NULL || tp->num < ret->num) | |
446 | ret = tp; | |
447 | ||
448 | return ret; | |
449 | } | |
450 | ||
2277426b PA |
451 | struct thread_info * |
452 | any_thread_of_process (int pid) | |
453 | { | |
454 | struct thread_info *tp; | |
455 | ||
456 | for (tp = thread_list; tp; tp = tp->next) | |
457 | if (ptid_get_pid (tp->ptid) == pid) | |
458 | return tp; | |
459 | ||
460 | return NULL; | |
461 | } | |
462 | ||
6c95b8df PA |
463 | struct thread_info * |
464 | any_live_thread_of_process (int pid) | |
465 | { | |
466 | struct thread_info *tp; | |
9941e0c5 | 467 | struct thread_info *tp_executing = NULL; |
6c95b8df PA |
468 | |
469 | for (tp = thread_list; tp; tp = tp->next) | |
30596231 | 470 | if (tp->state != THREAD_EXITED && ptid_get_pid (tp->ptid) == pid) |
6c95b8df | 471 | { |
30596231 | 472 | if (tp->executing) |
9941e0c5 MK |
473 | tp_executing = tp; |
474 | else | |
6c95b8df | 475 | return tp; |
6c95b8df PA |
476 | } |
477 | ||
9941e0c5 | 478 | return tp_executing; |
6c95b8df PA |
479 | } |
480 | ||
8b93c638 | 481 | /* Print a list of thread ids currently known, and the total number of |
c378eb4e | 482 | threads. To be used from within catch_errors. */ |
6949171e JJ |
483 | static int |
484 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) | |
8b93c638 JM |
485 | { |
486 | struct thread_info *tp; | |
487 | int num = 0; | |
3b31d625 | 488 | struct cleanup *cleanup_chain; |
592375cd | 489 | int current_thread = -1; |
8b93c638 | 490 | |
dc146f7c | 491 | update_thread_list (); |
7990a578 | 492 | |
3b31d625 | 493 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
8b93c638 JM |
494 | |
495 | for (tp = thread_list; tp; tp = tp->next) | |
496 | { | |
30596231 | 497 | if (tp->state == THREAD_EXITED) |
4f8d22e3 | 498 | continue; |
592375cd VP |
499 | |
500 | if (ptid_equal (tp->ptid, inferior_ptid)) | |
501 | current_thread = tp->num; | |
502 | ||
8b93c638 JM |
503 | num++; |
504 | ui_out_field_int (uiout, "thread-id", tp->num); | |
505 | } | |
506 | ||
3b31d625 | 507 | do_cleanups (cleanup_chain); |
592375cd VP |
508 | |
509 | if (current_thread != -1) | |
510 | ui_out_field_int (uiout, "current-thread-id", current_thread); | |
8b93c638 JM |
511 | ui_out_field_int (uiout, "number-of-threads", num); |
512 | return GDB_RC_OK; | |
513 | } | |
514 | ||
515 | /* Official gdblib interface function to get a list of thread ids and | |
c378eb4e | 516 | the total number. */ |
8b93c638 | 517 | enum gdb_rc |
ce43223b | 518 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
8b93c638 | 519 | { |
b0b13bb4 DJ |
520 | if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
521 | error_message, RETURN_MASK_ALL) < 0) | |
522 | return GDB_RC_FAIL; | |
523 | return GDB_RC_OK; | |
8b93c638 | 524 | } |
c906108c | 525 | |
c378eb4e | 526 | /* Return true if TP is an active thread. */ |
c906108c | 527 | static int |
fba45db2 | 528 | thread_alive (struct thread_info *tp) |
c906108c | 529 | { |
30596231 | 530 | if (tp->state == THREAD_EXITED) |
c906108c | 531 | return 0; |
39f77062 | 532 | if (!target_thread_alive (tp->ptid)) |
4f8d22e3 | 533 | return 0; |
c906108c SS |
534 | return 1; |
535 | } | |
536 | ||
537 | static void | |
fba45db2 | 538 | prune_threads (void) |
c906108c | 539 | { |
d4f3574e | 540 | struct thread_info *tp, *next; |
c906108c | 541 | |
c906108c SS |
542 | for (tp = thread_list; tp; tp = next) |
543 | { | |
544 | next = tp->next; | |
545 | if (!thread_alive (tp)) | |
39f77062 | 546 | delete_thread (tp->ptid); |
c906108c SS |
547 | } |
548 | } | |
549 | ||
5231c1fd PA |
550 | void |
551 | thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid) | |
552 | { | |
82f73884 PA |
553 | struct inferior *inf; |
554 | struct thread_info *tp; | |
555 | ||
556 | /* It can happen that what we knew as the target inferior id | |
557 | changes. E.g, target remote may only discover the remote process | |
558 | pid after adding the inferior to GDB's list. */ | |
559 | inf = find_inferior_pid (ptid_get_pid (old_ptid)); | |
560 | inf->pid = ptid_get_pid (new_ptid); | |
561 | ||
e09875d4 | 562 | tp = find_thread_ptid (old_ptid); |
5231c1fd PA |
563 | tp->ptid = new_ptid; |
564 | ||
565 | observer_notify_thread_ptid_changed (old_ptid, new_ptid); | |
566 | } | |
567 | ||
e1ac3328 VP |
568 | void |
569 | set_running (ptid_t ptid, int running) | |
570 | { | |
571 | struct thread_info *tp; | |
d90e17a7 | 572 | int all = ptid_equal (ptid, minus_one_ptid); |
e1ac3328 | 573 | |
e1ac3328 VP |
574 | /* We try not to notify the observer if no thread has actually changed |
575 | the running state -- merely to reduce the number of messages to | |
576 | frontend. Frontend is supposed to handle multiple *running just fine. */ | |
d90e17a7 | 577 | if (all || ptid_is_pid (ptid)) |
e1ac3328 VP |
578 | { |
579 | int any_started = 0; | |
5d502164 | 580 | |
e1ac3328 | 581 | for (tp = thread_list; tp; tp = tp->next) |
d90e17a7 PA |
582 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
583 | { | |
30596231 | 584 | if (tp->state == THREAD_EXITED) |
d90e17a7 | 585 | continue; |
30596231 | 586 | if (running && tp->state == THREAD_STOPPED) |
d90e17a7 | 587 | any_started = 1; |
30596231 | 588 | tp->state = running ? THREAD_RUNNING : THREAD_STOPPED; |
d90e17a7 | 589 | } |
c5a4d20b PA |
590 | if (any_started) |
591 | observer_notify_target_resumed (ptid); | |
e1ac3328 VP |
592 | } |
593 | else | |
594 | { | |
4f8d22e3 | 595 | int started = 0; |
5d502164 | 596 | |
e09875d4 | 597 | tp = find_thread_ptid (ptid); |
e1ac3328 | 598 | gdb_assert (tp); |
30596231 PA |
599 | gdb_assert (tp->state != THREAD_EXITED); |
600 | if (running && tp->state == THREAD_STOPPED) | |
4f8d22e3 | 601 | started = 1; |
30596231 | 602 | tp->state = running ? THREAD_RUNNING : THREAD_STOPPED; |
c5a4d20b | 603 | if (started) |
4f8d22e3 PA |
604 | observer_notify_target_resumed (ptid); |
605 | } | |
e1ac3328 VP |
606 | } |
607 | ||
4f8d22e3 PA |
608 | static int |
609 | is_thread_state (ptid_t ptid, enum thread_state state) | |
e1ac3328 VP |
610 | { |
611 | struct thread_info *tp; | |
612 | ||
e09875d4 | 613 | tp = find_thread_ptid (ptid); |
e1ac3328 | 614 | gdb_assert (tp); |
30596231 | 615 | return tp->state == state; |
4f8d22e3 PA |
616 | } |
617 | ||
618 | int | |
619 | is_stopped (ptid_t ptid) | |
620 | { | |
4f8d22e3 PA |
621 | return is_thread_state (ptid, THREAD_STOPPED); |
622 | } | |
623 | ||
624 | int | |
625 | is_exited (ptid_t ptid) | |
626 | { | |
4f8d22e3 PA |
627 | return is_thread_state (ptid, THREAD_EXITED); |
628 | } | |
629 | ||
630 | int | |
631 | is_running (ptid_t ptid) | |
632 | { | |
4f8d22e3 | 633 | return is_thread_state (ptid, THREAD_RUNNING); |
e1ac3328 VP |
634 | } |
635 | ||
8ea051c5 PA |
636 | int |
637 | any_running (void) | |
638 | { | |
639 | struct thread_info *tp; | |
640 | ||
8ea051c5 | 641 | for (tp = thread_list; tp; tp = tp->next) |
30596231 | 642 | if (tp->state == THREAD_RUNNING) |
8ea051c5 PA |
643 | return 1; |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | int | |
649 | is_executing (ptid_t ptid) | |
650 | { | |
651 | struct thread_info *tp; | |
652 | ||
e09875d4 | 653 | tp = find_thread_ptid (ptid); |
8ea051c5 | 654 | gdb_assert (tp); |
30596231 | 655 | return tp->executing; |
8ea051c5 PA |
656 | } |
657 | ||
658 | void | |
659 | set_executing (ptid_t ptid, int executing) | |
660 | { | |
661 | struct thread_info *tp; | |
d90e17a7 | 662 | int all = ptid_equal (ptid, minus_one_ptid); |
8ea051c5 | 663 | |
d90e17a7 | 664 | if (all || ptid_is_pid (ptid)) |
8ea051c5 PA |
665 | { |
666 | for (tp = thread_list; tp; tp = tp->next) | |
d90e17a7 | 667 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
30596231 | 668 | tp->executing = executing; |
8ea051c5 PA |
669 | } |
670 | else | |
671 | { | |
e09875d4 | 672 | tp = find_thread_ptid (ptid); |
8ea051c5 | 673 | gdb_assert (tp); |
30596231 | 674 | tp->executing = executing; |
8ea051c5 PA |
675 | } |
676 | } | |
677 | ||
252fbfc8 PA |
678 | void |
679 | set_stop_requested (ptid_t ptid, int stop) | |
680 | { | |
681 | struct thread_info *tp; | |
682 | int all = ptid_equal (ptid, minus_one_ptid); | |
683 | ||
684 | if (all || ptid_is_pid (ptid)) | |
685 | { | |
686 | for (tp = thread_list; tp; tp = tp->next) | |
687 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) | |
688 | tp->stop_requested = stop; | |
689 | } | |
690 | else | |
691 | { | |
e09875d4 | 692 | tp = find_thread_ptid (ptid); |
252fbfc8 PA |
693 | gdb_assert (tp); |
694 | tp->stop_requested = stop; | |
695 | } | |
696 | ||
697 | /* Call the stop requested observer so other components of GDB can | |
698 | react to this request. */ | |
699 | if (stop) | |
700 | observer_notify_thread_stop_requested (ptid); | |
701 | } | |
702 | ||
29f49a6a PA |
703 | void |
704 | finish_thread_state (ptid_t ptid) | |
705 | { | |
706 | struct thread_info *tp; | |
707 | int all; | |
708 | int any_started = 0; | |
709 | ||
710 | all = ptid_equal (ptid, minus_one_ptid); | |
711 | ||
712 | if (all || ptid_is_pid (ptid)) | |
713 | { | |
714 | for (tp = thread_list; tp; tp = tp->next) | |
715 | { | |
30596231 | 716 | if (tp->state == THREAD_EXITED) |
29f49a6a PA |
717 | continue; |
718 | if (all || ptid_get_pid (ptid) == ptid_get_pid (tp->ptid)) | |
719 | { | |
30596231 | 720 | if (tp->executing && tp->state == THREAD_STOPPED) |
29f49a6a | 721 | any_started = 1; |
30596231 | 722 | tp->state = tp->executing ? THREAD_RUNNING : THREAD_STOPPED; |
29f49a6a PA |
723 | } |
724 | } | |
725 | } | |
726 | else | |
727 | { | |
e09875d4 | 728 | tp = find_thread_ptid (ptid); |
29f49a6a | 729 | gdb_assert (tp); |
30596231 | 730 | if (tp->state != THREAD_EXITED) |
29f49a6a | 731 | { |
30596231 | 732 | if (tp->executing && tp->state == THREAD_STOPPED) |
29f49a6a | 733 | any_started = 1; |
30596231 | 734 | tp->state = tp->executing ? THREAD_RUNNING : THREAD_STOPPED; |
29f49a6a PA |
735 | } |
736 | } | |
737 | ||
738 | if (any_started) | |
739 | observer_notify_target_resumed (ptid); | |
740 | } | |
741 | ||
742 | void | |
743 | finish_thread_state_cleanup (void *arg) | |
744 | { | |
745 | ptid_t *ptid_p = arg; | |
746 | ||
747 | gdb_assert (arg); | |
748 | ||
749 | finish_thread_state (*ptid_p); | |
750 | } | |
751 | ||
8e8901c5 | 752 | /* Prints the list of threads and their details on UIOUT. |
aea5b279 | 753 | This is a version of 'info_threads_command' suitable for |
c378eb4e | 754 | use from MI. |
4f8d22e3 | 755 | If REQUESTED_THREAD is not -1, it's the GDB id of the thread |
8e8901c5 | 756 | that should be printed. Otherwise, all threads are |
c378eb4e | 757 | printed. |
3ee1c036 | 758 | If PID is not -1, only print threads from the process PID. |
c378eb4e | 759 | Otherwise, threads from all attached PIDs are printed. |
3ee1c036 VP |
760 | If both REQUESTED_THREAD and PID are not -1, then the thread |
761 | is printed if it belongs to the specified process. Otherwise, | |
762 | an error is raised. */ | |
8e8901c5 | 763 | void |
aea5b279 | 764 | print_thread_info (struct ui_out *uiout, char *requested_threads, int pid) |
c906108c SS |
765 | { |
766 | struct thread_info *tp; | |
39f77062 | 767 | ptid_t current_ptid; |
99b3d574 | 768 | struct cleanup *old_chain; |
4694da01 | 769 | char *extra_info, *name, *target_id; |
8e8901c5 | 770 | int current_thread = -1; |
c906108c | 771 | |
dc146f7c | 772 | update_thread_list (); |
39f77062 | 773 | current_ptid = inferior_ptid; |
4f8d22e3 PA |
774 | |
775 | /* We'll be switching threads temporarily. */ | |
776 | old_chain = make_cleanup_restore_current_thread (); | |
777 | ||
a7658b96 TT |
778 | /* For backward compatibility, we make a list for MI. A table is |
779 | preferable for the CLI, though, because it shows table | |
780 | headers. */ | |
781 | if (ui_out_is_mi_like_p (uiout)) | |
782 | make_cleanup_ui_out_list_begin_end (uiout, "threads"); | |
783 | else | |
784 | { | |
785 | int n_threads = 0; | |
786 | ||
787 | for (tp = thread_list; tp; tp = tp->next) | |
788 | { | |
aea5b279 | 789 | if (!number_is_in_list (requested_threads, tp->num)) |
a7658b96 TT |
790 | continue; |
791 | ||
792 | if (pid != -1 && PIDGET (tp->ptid) != pid) | |
793 | continue; | |
794 | ||
30596231 | 795 | if (tp->state == THREAD_EXITED) |
a7658b96 TT |
796 | continue; |
797 | ||
798 | ++n_threads; | |
799 | } | |
800 | ||
801 | if (n_threads == 0) | |
802 | { | |
aea5b279 | 803 | if (requested_threads == NULL || *requested_threads == '\0') |
a7658b96 TT |
804 | ui_out_message (uiout, 0, _("No threads.\n")); |
805 | else | |
aea5b279 MS |
806 | ui_out_message (uiout, 0, _("No threads match '%s'.\n"), |
807 | requested_threads); | |
a7658b96 TT |
808 | do_cleanups (old_chain); |
809 | return; | |
810 | } | |
811 | ||
4694da01 | 812 | make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads"); |
a7658b96 TT |
813 | |
814 | ui_out_table_header (uiout, 1, ui_left, "current", ""); | |
815 | ui_out_table_header (uiout, 4, ui_left, "id", "Id"); | |
816 | ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id"); | |
a7658b96 TT |
817 | ui_out_table_header (uiout, 1, ui_left, "frame", "Frame"); |
818 | ui_out_table_body (uiout); | |
819 | } | |
820 | ||
c906108c SS |
821 | for (tp = thread_list; tp; tp = tp->next) |
822 | { | |
8e8901c5 | 823 | struct cleanup *chain2; |
dc146f7c | 824 | int core; |
8e8901c5 | 825 | |
aea5b279 | 826 | if (!number_is_in_list (requested_threads, tp->num)) |
8e8901c5 VP |
827 | continue; |
828 | ||
3ee1c036 VP |
829 | if (pid != -1 && PIDGET (tp->ptid) != pid) |
830 | { | |
aea5b279 | 831 | if (requested_threads != NULL && *requested_threads != '\0') |
3ee1c036 VP |
832 | error (_("Requested thread not found in requested process")); |
833 | continue; | |
834 | } | |
835 | ||
4f8d22e3 PA |
836 | if (ptid_equal (tp->ptid, current_ptid)) |
837 | current_thread = tp->num; | |
838 | ||
30596231 | 839 | if (tp->state == THREAD_EXITED) |
4f8d22e3 PA |
840 | continue; |
841 | ||
8e8901c5 VP |
842 | chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
843 | ||
a7658b96 TT |
844 | if (ui_out_is_mi_like_p (uiout)) |
845 | { | |
846 | /* Compatibility. */ | |
847 | if (ptid_equal (tp->ptid, current_ptid)) | |
848 | ui_out_text (uiout, "* "); | |
849 | else | |
850 | ui_out_text (uiout, " "); | |
851 | } | |
c906108c | 852 | else |
a7658b96 TT |
853 | { |
854 | if (ptid_equal (tp->ptid, current_ptid)) | |
855 | ui_out_field_string (uiout, "current", "*"); | |
856 | else | |
857 | ui_out_field_skip (uiout, "current"); | |
858 | } | |
c906108c | 859 | |
8e8901c5 | 860 | ui_out_field_int (uiout, "id", tp->num); |
0d06e24b | 861 | |
4694da01 TT |
862 | /* For the CLI, we stuff everything into the target-id field. |
863 | This is a gross hack to make the output come out looking | |
864 | correct. The underlying problem here is that ui-out has no | |
865 | way to specify that a field's space allocation should be | |
866 | shared by several fields. For MI, we do the right thing | |
867 | instead. */ | |
868 | ||
869 | target_id = target_pid_to_str (tp->ptid); | |
ed406532 | 870 | extra_info = target_extra_thread_info (tp); |
4694da01 TT |
871 | name = tp->name ? tp->name : target_thread_name (tp); |
872 | ||
873 | if (ui_out_is_mi_like_p (uiout)) | |
8e8901c5 | 874 | { |
4694da01 TT |
875 | ui_out_field_string (uiout, "target-id", target_id); |
876 | if (extra_info) | |
877 | ui_out_field_string (uiout, "details", extra_info); | |
878 | if (name) | |
879 | ui_out_field_string (uiout, "name", name); | |
880 | } | |
881 | else | |
882 | { | |
883 | struct cleanup *str_cleanup; | |
884 | char *contents; | |
885 | ||
886 | if (extra_info && name) | |
887 | contents = xstrprintf ("%s \"%s\" (%s)", target_id, | |
888 | name, extra_info); | |
889 | else if (extra_info) | |
890 | contents = xstrprintf ("%s (%s)", target_id, extra_info); | |
891 | else if (name) | |
892 | contents = xstrprintf ("%s \"%s\"", target_id, name); | |
893 | else | |
894 | contents = xstrdup (target_id); | |
895 | str_cleanup = make_cleanup (xfree, contents); | |
896 | ||
897 | ui_out_field_string (uiout, "target-id", contents); | |
898 | do_cleanups (str_cleanup); | |
8e8901c5 | 899 | } |
4f8d22e3 | 900 | |
30596231 | 901 | if (tp->state == THREAD_RUNNING) |
94cc34af PA |
902 | ui_out_text (uiout, "(running)\n"); |
903 | else | |
904 | { | |
905 | /* The switch below puts us at the top of the stack (leaf | |
906 | frame). */ | |
907 | switch_to_thread (tp->ptid); | |
908 | print_stack_frame (get_selected_frame (NULL), | |
909 | /* For MI output, print frame level. */ | |
910 | ui_out_is_mi_like_p (uiout), | |
911 | LOCATION); | |
912 | } | |
8e8901c5 | 913 | |
90139f7d VP |
914 | if (ui_out_is_mi_like_p (uiout)) |
915 | { | |
916 | char *state = "stopped"; | |
5d502164 | 917 | |
30596231 | 918 | if (tp->state == THREAD_RUNNING) |
90139f7d VP |
919 | state = "running"; |
920 | ui_out_field_string (uiout, "state", state); | |
921 | } | |
922 | ||
dc146f7c VP |
923 | core = target_core_of_thread (tp->ptid); |
924 | if (ui_out_is_mi_like_p (uiout) && core != -1) | |
925 | ui_out_field_int (uiout, "core", core); | |
926 | ||
8e8901c5 | 927 | do_cleanups (chain2); |
c906108c SS |
928 | } |
929 | ||
99b3d574 DP |
930 | /* Restores the current thread and the frame selected before |
931 | the "info threads" command. */ | |
932 | do_cleanups (old_chain); | |
c906108c | 933 | |
aea5b279 | 934 | if (pid == -1 && requested_threads == NULL) |
8e8901c5 | 935 | { |
4f8d22e3 | 936 | gdb_assert (current_thread != -1 |
d729566a PA |
937 | || !thread_list |
938 | || ptid_equal (inferior_ptid, null_ptid)); | |
0bcd3e20 | 939 | if (current_thread != -1 && ui_out_is_mi_like_p (uiout)) |
8e8901c5 | 940 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
94cc34af | 941 | |
4f8d22e3 PA |
942 | if (current_thread != -1 && is_exited (current_ptid)) |
943 | ui_out_message (uiout, 0, "\n\ | |
944 | The current thread <Thread ID %d> has terminated. See `help thread'.\n", | |
945 | current_thread); | |
d729566a PA |
946 | else if (thread_list |
947 | && current_thread == -1 | |
948 | && ptid_equal (current_ptid, null_ptid)) | |
949 | ui_out_message (uiout, 0, "\n\ | |
950 | No selected thread. See `help thread'.\n"); | |
c906108c | 951 | } |
c906108c SS |
952 | } |
953 | ||
8e8901c5 VP |
954 | /* Print information about currently known threads |
955 | ||
60f98dde MS |
956 | Optional ARG is a thread id, or list of thread ids. |
957 | ||
958 | Note: this has the drawback that it _really_ switches | |
959 | threads, which frees the frame cache. A no-side | |
960 | effects info-threads command would be nicer. */ | |
8e8901c5 VP |
961 | |
962 | static void | |
963 | info_threads_command (char *arg, int from_tty) | |
964 | { | |
79a45e25 | 965 | print_thread_info (current_uiout, arg, -1); |
8e8901c5 VP |
966 | } |
967 | ||
c378eb4e | 968 | /* Switch from one thread to another. */ |
c906108c | 969 | |
6a6b96b9 | 970 | void |
39f77062 | 971 | switch_to_thread (ptid_t ptid) |
c906108c | 972 | { |
6c95b8df PA |
973 | /* Switch the program space as well, if we can infer it from the now |
974 | current thread. Otherwise, it's up to the caller to select the | |
975 | space it wants. */ | |
976 | if (!ptid_equal (ptid, null_ptid)) | |
977 | { | |
978 | struct inferior *inf; | |
979 | ||
980 | inf = find_inferior_pid (ptid_get_pid (ptid)); | |
981 | gdb_assert (inf != NULL); | |
982 | set_current_program_space (inf->pspace); | |
983 | set_current_inferior (inf); | |
984 | } | |
985 | ||
39f77062 | 986 | if (ptid_equal (ptid, inferior_ptid)) |
c906108c SS |
987 | return; |
988 | ||
39f77062 | 989 | inferior_ptid = ptid; |
35f196d9 | 990 | reinit_frame_cache (); |
c906108c | 991 | registers_changed (); |
94cc34af | 992 | |
4f8d22e3 PA |
993 | /* We don't check for is_stopped, because we're called at times |
994 | while in the TARGET_RUNNING state, e.g., while handling an | |
995 | internal event. */ | |
d729566a PA |
996 | if (!ptid_equal (inferior_ptid, null_ptid) |
997 | && !is_exited (ptid) | |
998 | && !is_executing (ptid)) | |
fb14de7b | 999 | stop_pc = regcache_read_pc (get_thread_regcache (ptid)); |
94cc34af PA |
1000 | else |
1001 | stop_pc = ~(CORE_ADDR) 0; | |
c906108c SS |
1002 | } |
1003 | ||
1004 | static void | |
39f77062 | 1005 | restore_current_thread (ptid_t ptid) |
c906108c | 1006 | { |
dcf4fbde | 1007 | switch_to_thread (ptid); |
99b3d574 DP |
1008 | } |
1009 | ||
1010 | static void | |
4f8d22e3 | 1011 | restore_selected_frame (struct frame_id a_frame_id, int frame_level) |
99b3d574 | 1012 | { |
4f8d22e3 PA |
1013 | struct frame_info *frame = NULL; |
1014 | int count; | |
1015 | ||
eb8c0621 TT |
1016 | /* This means there was no selected frame. */ |
1017 | if (frame_level == -1) | |
1018 | { | |
1019 | select_frame (NULL); | |
1020 | return; | |
1021 | } | |
1022 | ||
4f8d22e3 PA |
1023 | gdb_assert (frame_level >= 0); |
1024 | ||
1025 | /* Restore by level first, check if the frame id is the same as | |
1026 | expected. If that fails, try restoring by frame id. If that | |
1027 | fails, nothing to do, just warn the user. */ | |
1028 | ||
1029 | count = frame_level; | |
1030 | frame = find_relative_frame (get_current_frame (), &count); | |
1031 | if (count == 0 | |
1032 | && frame != NULL | |
005ca36a JB |
1033 | /* The frame ids must match - either both valid or both outer_frame_id. |
1034 | The latter case is not failsafe, but since it's highly unlikely | |
4f8d22e3 PA |
1035 | the search by level finds the wrong frame, it's 99.9(9)% of |
1036 | the time (for all practical purposes) safe. */ | |
005ca36a | 1037 | && frame_id_eq (get_frame_id (frame), a_frame_id)) |
4f8d22e3 PA |
1038 | { |
1039 | /* Cool, all is fine. */ | |
1040 | select_frame (frame); | |
1041 | return; | |
1042 | } | |
99b3d574 | 1043 | |
4f8d22e3 PA |
1044 | frame = frame_find_by_id (a_frame_id); |
1045 | if (frame != NULL) | |
1046 | { | |
1047 | /* Cool, refound it. */ | |
1048 | select_frame (frame); | |
1049 | return; | |
1050 | } | |
99b3d574 | 1051 | |
0c501536 PA |
1052 | /* Nothing else to do, the frame layout really changed. Select the |
1053 | innermost stack frame. */ | |
1054 | select_frame (get_current_frame ()); | |
1055 | ||
1056 | /* Warn the user. */ | |
79a45e25 | 1057 | if (frame_level > 0 && !ui_out_is_mi_like_p (current_uiout)) |
99b3d574 | 1058 | { |
3e43a32a MS |
1059 | warning (_("Couldn't restore frame #%d in " |
1060 | "current thread, at reparsed frame #0\n"), | |
4f8d22e3 PA |
1061 | frame_level); |
1062 | /* For MI, we should probably have a notification about | |
1063 | current frame change. But this error is not very | |
1064 | likely, so don't bother for now. */ | |
0c501536 | 1065 | print_stack_frame (get_selected_frame (NULL), 1, SRC_LINE); |
c906108c SS |
1066 | } |
1067 | } | |
1068 | ||
6ecce94d AC |
1069 | struct current_thread_cleanup |
1070 | { | |
39f77062 | 1071 | ptid_t inferior_ptid; |
99b3d574 | 1072 | struct frame_id selected_frame_id; |
4f8d22e3 PA |
1073 | int selected_frame_level; |
1074 | int was_stopped; | |
6c95b8df | 1075 | int inf_id; |
6ecce94d AC |
1076 | }; |
1077 | ||
1078 | static void | |
1079 | do_restore_current_thread_cleanup (void *arg) | |
1080 | { | |
4f8d22e3 | 1081 | struct thread_info *tp; |
6ecce94d | 1082 | struct current_thread_cleanup *old = arg; |
d729566a | 1083 | |
e09875d4 | 1084 | tp = find_thread_ptid (old->inferior_ptid); |
d729566a PA |
1085 | |
1086 | /* If the previously selected thread belonged to a process that has | |
1087 | in the mean time been deleted (due to normal exit, detach, etc.), | |
1088 | then don't revert back to it, but instead simply drop back to no | |
1089 | thread selected. */ | |
1090 | if (tp | |
88fc996f | 1091 | && find_inferior_pid (ptid_get_pid (tp->ptid)) != NULL) |
d729566a | 1092 | restore_current_thread (old->inferior_ptid); |
88fc996f | 1093 | else |
6c95b8df PA |
1094 | { |
1095 | restore_current_thread (null_ptid); | |
1096 | set_current_inferior (find_inferior_id (old->inf_id)); | |
1097 | } | |
94cc34af | 1098 | |
4f8d22e3 PA |
1099 | /* The running state of the originally selected thread may have |
1100 | changed, so we have to recheck it here. */ | |
d729566a PA |
1101 | if (!ptid_equal (inferior_ptid, null_ptid) |
1102 | && old->was_stopped | |
4f8d22e3 PA |
1103 | && is_stopped (inferior_ptid) |
1104 | && target_has_registers | |
1105 | && target_has_stack | |
1106 | && target_has_memory) | |
1107 | restore_selected_frame (old->selected_frame_id, | |
1108 | old->selected_frame_level); | |
1109 | } | |
1110 | ||
1111 | static void | |
1112 | restore_current_thread_cleanup_dtor (void *arg) | |
1113 | { | |
1114 | struct current_thread_cleanup *old = arg; | |
1115 | struct thread_info *tp; | |
5d502164 | 1116 | |
e09875d4 | 1117 | tp = find_thread_ptid (old->inferior_ptid); |
4f8d22e3 PA |
1118 | if (tp) |
1119 | tp->refcount--; | |
b8c9b27d | 1120 | xfree (old); |
6ecce94d AC |
1121 | } |
1122 | ||
6208b47d | 1123 | struct cleanup * |
4f8d22e3 | 1124 | make_cleanup_restore_current_thread (void) |
6ecce94d | 1125 | { |
4f8d22e3 PA |
1126 | struct thread_info *tp; |
1127 | struct frame_info *frame; | |
1128 | struct current_thread_cleanup *old; | |
1129 | ||
1130 | old = xmalloc (sizeof (struct current_thread_cleanup)); | |
39f77062 | 1131 | old->inferior_ptid = inferior_ptid; |
6c95b8df | 1132 | old->inf_id = current_inferior ()->num; |
4f8d22e3 | 1133 | |
d729566a PA |
1134 | if (!ptid_equal (inferior_ptid, null_ptid)) |
1135 | { | |
1136 | old->was_stopped = is_stopped (inferior_ptid); | |
1137 | if (old->was_stopped | |
1138 | && target_has_registers | |
1139 | && target_has_stack | |
1140 | && target_has_memory) | |
eb8c0621 TT |
1141 | { |
1142 | /* When processing internal events, there might not be a | |
1143 | selected frame. If we naively call get_selected_frame | |
1144 | here, then we can end up reading debuginfo for the | |
1145 | current frame, but we don't generally need the debuginfo | |
1146 | at this point. */ | |
1147 | frame = get_selected_frame_if_set (); | |
1148 | } | |
d729566a PA |
1149 | else |
1150 | frame = NULL; | |
4f8d22e3 | 1151 | |
d729566a PA |
1152 | old->selected_frame_id = get_frame_id (frame); |
1153 | old->selected_frame_level = frame_relative_level (frame); | |
1154 | ||
e09875d4 | 1155 | tp = find_thread_ptid (inferior_ptid); |
d729566a PA |
1156 | if (tp) |
1157 | tp->refcount++; | |
1158 | } | |
4f8d22e3 PA |
1159 | |
1160 | return make_cleanup_dtor (do_restore_current_thread_cleanup, old, | |
1161 | restore_current_thread_cleanup_dtor); | |
6ecce94d AC |
1162 | } |
1163 | ||
c906108c SS |
1164 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
1165 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist | |
1166 | of two numbers seperated by a hyphen. Examples: | |
1167 | ||
c5aa993b JM |
1168 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
1169 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 | |
c378eb4e | 1170 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */ |
c906108c SS |
1171 | |
1172 | static void | |
fba45db2 | 1173 | thread_apply_all_command (char *cmd, int from_tty) |
c906108c SS |
1174 | { |
1175 | struct thread_info *tp; | |
4f8d22e3 | 1176 | struct cleanup *old_chain; |
e35ce267 | 1177 | char *saved_cmd; |
c906108c SS |
1178 | |
1179 | if (cmd == NULL || *cmd == '\000') | |
8a3fe4f8 | 1180 | error (_("Please specify a command following the thread ID list")); |
94cc34af | 1181 | |
dc146f7c | 1182 | update_thread_list (); |
e9d196c5 | 1183 | |
4f8d22e3 PA |
1184 | old_chain = make_cleanup_restore_current_thread (); |
1185 | ||
e35ce267 | 1186 | /* Save a copy of the command in case it is clobbered by |
c378eb4e | 1187 | execute_command. */ |
5b616ba1 | 1188 | saved_cmd = xstrdup (cmd); |
94cc34af | 1189 | make_cleanup (xfree, saved_cmd); |
c906108c SS |
1190 | for (tp = thread_list; tp; tp = tp->next) |
1191 | if (thread_alive (tp)) | |
1192 | { | |
dcf4fbde | 1193 | switch_to_thread (tp->ptid); |
94cc34af | 1194 | |
a3f17187 | 1195 | printf_filtered (_("\nThread %d (%s):\n"), |
54ba13f7 | 1196 | tp->num, target_pid_to_str (inferior_ptid)); |
c906108c | 1197 | execute_command (cmd, from_tty); |
3e43a32a MS |
1198 | strcpy (cmd, saved_cmd); /* Restore exact command used |
1199 | previously. */ | |
c906108c | 1200 | } |
6ecce94d AC |
1201 | |
1202 | do_cleanups (old_chain); | |
c906108c SS |
1203 | } |
1204 | ||
1205 | static void | |
fba45db2 | 1206 | thread_apply_command (char *tidlist, int from_tty) |
c906108c SS |
1207 | { |
1208 | char *cmd; | |
c906108c | 1209 | struct cleanup *old_chain; |
e35ce267 | 1210 | char *saved_cmd; |
197f0a60 | 1211 | struct get_number_or_range_state state; |
c906108c SS |
1212 | |
1213 | if (tidlist == NULL || *tidlist == '\000') | |
8a3fe4f8 | 1214 | error (_("Please specify a thread ID list")); |
c906108c | 1215 | |
c5aa993b | 1216 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
c906108c SS |
1217 | |
1218 | if (*cmd == '\000') | |
8a3fe4f8 | 1219 | error (_("Please specify a command following the thread ID list")); |
c906108c | 1220 | |
e35ce267 | 1221 | /* Save a copy of the command in case it is clobbered by |
c378eb4e | 1222 | execute_command. */ |
5b616ba1 | 1223 | saved_cmd = xstrdup (cmd); |
4f8d22e3 | 1224 | old_chain = make_cleanup (xfree, saved_cmd); |
197f0a60 TT |
1225 | |
1226 | init_number_or_range (&state, tidlist); | |
1227 | while (!state.finished && state.string < cmd) | |
c906108c SS |
1228 | { |
1229 | struct thread_info *tp; | |
65ebfb52 MS |
1230 | int start; |
1231 | char *p = tidlist; | |
c906108c | 1232 | |
197f0a60 | 1233 | start = get_number_or_range (&state); |
c906108c | 1234 | |
65fc9b77 PA |
1235 | make_cleanup_restore_current_thread (); |
1236 | ||
65ebfb52 | 1237 | tp = find_thread_id (start); |
c906108c | 1238 | |
65ebfb52 MS |
1239 | if (!tp) |
1240 | warning (_("Unknown thread %d."), start); | |
1241 | else if (!thread_alive (tp)) | |
1242 | warning (_("Thread %d has terminated."), start); | |
1243 | else | |
1244 | { | |
1245 | switch_to_thread (tp->ptid); | |
4f8d22e3 | 1246 | |
65ebfb52 MS |
1247 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
1248 | target_pid_to_str (inferior_ptid)); | |
1249 | execute_command (cmd, from_tty); | |
4f8d22e3 | 1250 | |
65ebfb52 MS |
1251 | /* Restore exact command used previously. */ |
1252 | strcpy (cmd, saved_cmd); | |
c906108c SS |
1253 | } |
1254 | } | |
6ecce94d AC |
1255 | |
1256 | do_cleanups (old_chain); | |
c906108c SS |
1257 | } |
1258 | ||
1259 | /* Switch to the specified thread. Will dispatch off to thread_apply_command | |
1260 | if prefix of arg is `apply'. */ | |
1261 | ||
1262 | static void | |
fba45db2 | 1263 | thread_command (char *tidstr, int from_tty) |
c906108c | 1264 | { |
c906108c SS |
1265 | if (!tidstr) |
1266 | { | |
d729566a PA |
1267 | if (ptid_equal (inferior_ptid, null_ptid)) |
1268 | error (_("No thread selected")); | |
1269 | ||
c906108c | 1270 | if (target_has_stack) |
4f8d22e3 PA |
1271 | { |
1272 | if (is_exited (inferior_ptid)) | |
1273 | printf_filtered (_("[Current thread is %d (%s) (exited)]\n"), | |
1274 | pid_to_thread_id (inferior_ptid), | |
54ba13f7 | 1275 | target_pid_to_str (inferior_ptid)); |
4f8d22e3 PA |
1276 | else |
1277 | printf_filtered (_("[Current thread is %d (%s)]\n"), | |
1278 | pid_to_thread_id (inferior_ptid), | |
54ba13f7 | 1279 | target_pid_to_str (inferior_ptid)); |
4f8d22e3 | 1280 | } |
c906108c | 1281 | else |
8a3fe4f8 | 1282 | error (_("No stack.")); |
c906108c SS |
1283 | return; |
1284 | } | |
c5394b80 | 1285 | |
79a45e25 | 1286 | gdb_thread_select (current_uiout, tidstr, NULL); |
c5394b80 JM |
1287 | } |
1288 | ||
4694da01 TT |
1289 | /* Implementation of `thread name'. */ |
1290 | ||
1291 | static void | |
1292 | thread_name_command (char *arg, int from_tty) | |
1293 | { | |
1294 | struct thread_info *info; | |
1295 | ||
1296 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1297 | error (_("No thread selected")); | |
1298 | ||
1299 | while (arg && isspace (*arg)) | |
1300 | ++arg; | |
1301 | ||
1302 | info = inferior_thread (); | |
1303 | xfree (info->name); | |
1304 | info->name = arg ? xstrdup (arg) : NULL; | |
1305 | } | |
1306 | ||
60f98dde MS |
1307 | /* Find thread ids with a name, target pid, or extra info matching ARG. */ |
1308 | ||
1309 | static void | |
1310 | thread_find_command (char *arg, int from_tty) | |
1311 | { | |
1312 | struct thread_info *tp; | |
1313 | char *tmp; | |
1314 | unsigned long match = 0; | |
1315 | ||
1316 | if (arg == NULL || *arg == '\0') | |
1317 | error (_("Command requires an argument.")); | |
1318 | ||
1319 | tmp = re_comp (arg); | |
1320 | if (tmp != 0) | |
1321 | error (_("Invalid regexp (%s): %s"), tmp, arg); | |
1322 | ||
1323 | update_thread_list (); | |
1324 | for (tp = thread_list; tp; tp = tp->next) | |
1325 | { | |
1326 | if (tp->name != NULL && re_exec (tp->name)) | |
1327 | { | |
1328 | printf_filtered (_("Thread %d has name '%s'\n"), | |
1329 | tp->num, tp->name); | |
1330 | match++; | |
1331 | } | |
1332 | ||
1333 | tmp = target_thread_name (tp); | |
1334 | if (tmp != NULL && re_exec (tmp)) | |
1335 | { | |
1336 | printf_filtered (_("Thread %d has target name '%s'\n"), | |
1337 | tp->num, tmp); | |
1338 | match++; | |
1339 | } | |
1340 | ||
1341 | tmp = target_pid_to_str (tp->ptid); | |
1342 | if (tmp != NULL && re_exec (tmp)) | |
1343 | { | |
1344 | printf_filtered (_("Thread %d has target id '%s'\n"), | |
1345 | tp->num, tmp); | |
1346 | match++; | |
1347 | } | |
1348 | ||
1349 | tmp = target_extra_thread_info (tp); | |
1350 | if (tmp != NULL && re_exec (tmp)) | |
1351 | { | |
1352 | printf_filtered (_("Thread %d has extra info '%s'\n"), | |
1353 | tp->num, tmp); | |
1354 | match++; | |
1355 | } | |
1356 | } | |
1357 | if (!match) | |
1358 | printf_filtered (_("No threads match '%s'\n"), arg); | |
1359 | } | |
1360 | ||
93815fbf VP |
1361 | /* Print notices when new threads are attached and detached. */ |
1362 | int print_thread_events = 1; | |
1363 | static void | |
1364 | show_print_thread_events (struct ui_file *file, int from_tty, | |
1365 | struct cmd_list_element *c, const char *value) | |
1366 | { | |
3e43a32a MS |
1367 | fprintf_filtered (file, |
1368 | _("Printing of thread events is %s.\n"), | |
93815fbf VP |
1369 | value); |
1370 | } | |
1371 | ||
c5394b80 | 1372 | static int |
6949171e | 1373 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
c5394b80 JM |
1374 | { |
1375 | int num; | |
1376 | struct thread_info *tp; | |
1377 | ||
81490ea1 | 1378 | num = value_as_long (parse_and_eval (tidstr)); |
c906108c SS |
1379 | |
1380 | tp = find_thread_id (num); | |
1381 | ||
8b93c638 | 1382 | if (!tp) |
8a3fe4f8 | 1383 | error (_("Thread ID %d not known."), num); |
c906108c SS |
1384 | |
1385 | if (!thread_alive (tp)) | |
8a3fe4f8 | 1386 | error (_("Thread ID %d has terminated."), num); |
c906108c | 1387 | |
dcf4fbde | 1388 | switch_to_thread (tp->ptid); |
c906108c | 1389 | |
db5a7484 NR |
1390 | annotate_thread_changed (); |
1391 | ||
8b93c638 | 1392 | ui_out_text (uiout, "[Switching to thread "); |
39f77062 | 1393 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
8b93c638 | 1394 | ui_out_text (uiout, " ("); |
54ba13f7 | 1395 | ui_out_text (uiout, target_pid_to_str (inferior_ptid)); |
8b93c638 | 1396 | ui_out_text (uiout, ")]"); |
c5394b80 | 1397 | |
4f8d22e3 PA |
1398 | /* Note that we can't reach this with an exited thread, due to the |
1399 | thread_alive check above. */ | |
30596231 | 1400 | if (tp->state == THREAD_RUNNING) |
94cc34af | 1401 | ui_out_text (uiout, "(running)\n"); |
4f8d22e3 | 1402 | else |
98871305 TT |
1403 | { |
1404 | ui_out_text (uiout, "\n"); | |
1405 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
1406 | } | |
4f8d22e3 PA |
1407 | |
1408 | /* Since the current thread may have changed, see if there is any | |
1409 | exited thread we can now delete. */ | |
1410 | prune_threads (); | |
94cc34af | 1411 | |
c5394b80 JM |
1412 | return GDB_RC_OK; |
1413 | } | |
1414 | ||
1415 | enum gdb_rc | |
ce43223b | 1416 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
c5394b80 | 1417 | { |
b0b13bb4 DJ |
1418 | if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
1419 | error_message, RETURN_MASK_ALL) < 0) | |
1420 | return GDB_RC_FAIL; | |
1421 | return GDB_RC_OK; | |
c906108c SS |
1422 | } |
1423 | ||
dc146f7c VP |
1424 | void |
1425 | update_thread_list (void) | |
1426 | { | |
1427 | prune_threads (); | |
1428 | target_find_new_threads (); | |
1429 | } | |
1430 | ||
6aed2dbc SS |
1431 | /* Return a new value for the selected thread's id. Return a value of 0 if |
1432 | no thread is selected, or no threads exist. */ | |
1433 | ||
1434 | static struct value * | |
1435 | thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var) | |
1436 | { | |
1437 | struct thread_info *tp = find_thread_ptid (inferior_ptid); | |
1438 | ||
1439 | return value_from_longest (builtin_type (gdbarch)->builtin_int, | |
1440 | (tp ? tp->num : 0)); | |
1441 | } | |
1442 | ||
c906108c SS |
1443 | /* Commands with a prefix of `thread'. */ |
1444 | struct cmd_list_element *thread_cmd_list = NULL; | |
1445 | ||
1446 | void | |
fba45db2 | 1447 | _initialize_thread (void) |
c906108c SS |
1448 | { |
1449 | static struct cmd_list_element *thread_apply_list = NULL; | |
c906108c | 1450 | |
60f98dde MS |
1451 | add_info ("threads", info_threads_command, |
1452 | _("Display currently known threads.\n\ | |
1453 | Usage: info threads [ID]...\n\ | |
1454 | Optional arguments are thread IDs with spaces between.\n\ | |
1455 | If no arguments, all threads are displayed.")); | |
c906108c | 1456 | |
d729566a | 1457 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
1bedd215 AC |
1458 | Use this command to switch between threads.\n\ |
1459 | The new thread ID must be currently known."), | |
d729566a | 1460 | &thread_cmd_list, "thread ", 1, &cmdlist); |
c906108c | 1461 | |
d729566a PA |
1462 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
1463 | _("Apply a command to a list of threads."), | |
1464 | &thread_apply_list, "thread apply ", 1, &thread_cmd_list); | |
c906108c | 1465 | |
d729566a PA |
1466 | add_cmd ("all", class_run, thread_apply_all_command, |
1467 | _("Apply a command to all threads."), &thread_apply_list); | |
c906108c | 1468 | |
4694da01 TT |
1469 | add_cmd ("name", class_run, thread_name_command, |
1470 | _("Set the current thread's name.\n\ | |
1471 | Usage: thread name [NAME]\n\ | |
1472 | If NAME is not given, then any existing name is removed."), &thread_cmd_list); | |
1473 | ||
60f98dde MS |
1474 | add_cmd ("find", class_run, thread_find_command, _("\ |
1475 | Find threads that match a regular expression.\n\ | |
1476 | Usage: thread find REGEXP\n\ | |
1477 | Will display thread ids whose name, target ID, or extra info matches REGEXP."), | |
1478 | &thread_cmd_list); | |
1479 | ||
c906108c SS |
1480 | if (!xdb_commands) |
1481 | add_com_alias ("t", "thread", class_run, 1); | |
93815fbf VP |
1482 | |
1483 | add_setshow_boolean_cmd ("thread-events", no_class, | |
1484 | &print_thread_events, _("\ | |
11c68c47 EZ |
1485 | Set printing of thread events (such as thread start and exit)."), _("\ |
1486 | Show printing of thread events (such as thread start and exit)."), NULL, | |
93815fbf VP |
1487 | NULL, |
1488 | show_print_thread_events, | |
1489 | &setprintlist, &showprintlist); | |
6aed2dbc SS |
1490 | |
1491 | create_internalvar_type_lazy ("_thread", thread_id_make_value); | |
c906108c | 1492 | } |