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, |
9b254dd1 | 4 | 2000, 2001, 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc. |
8926118c | 5 | |
b6ba6518 | 6 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. |
c906108c | 7 | |
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "symtab.h" | |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
27 | #include "environ.h" | |
28 | #include "value.h" | |
29 | #include "target.h" | |
30 | #include "gdbthread.h" | |
60250e8b | 31 | #include "exceptions.h" |
c906108c SS |
32 | #include "command.h" |
33 | #include "gdbcmd.h" | |
4e052eda | 34 | #include "regcache.h" |
5b7f31a4 | 35 | #include "gdb.h" |
b66d6d2e | 36 | #include "gdb_string.h" |
c906108c SS |
37 | |
38 | #include <ctype.h> | |
39 | #include <sys/types.h> | |
40 | #include <signal.h> | |
8b93c638 | 41 | #include "ui-out.h" |
683f2885 | 42 | #include "observer.h" |
d4fc5b1e | 43 | #include "annotate.h" |
c906108c | 44 | |
0d06e24b | 45 | /* Definition of struct thread_info exported to gdbthread.h */ |
c906108c SS |
46 | |
47 | /* Prototypes for exported functions. */ | |
48 | ||
a14ed312 | 49 | void _initialize_thread (void); |
c906108c SS |
50 | |
51 | /* Prototypes for local functions. */ | |
52 | ||
c906108c SS |
53 | static struct thread_info *thread_list = NULL; |
54 | static int highest_thread_num; | |
55 | ||
a14ed312 | 56 | static struct thread_info *find_thread_id (int num); |
c906108c | 57 | |
a14ed312 KB |
58 | static void thread_command (char *tidstr, int from_tty); |
59 | static void thread_apply_all_command (char *, int); | |
60 | static int thread_alive (struct thread_info *); | |
61 | static void info_threads_command (char *, int); | |
62 | static void thread_apply_command (char *, int); | |
39f77062 | 63 | static void restore_current_thread (ptid_t); |
a14ed312 | 64 | static void prune_threads (void); |
c906108c | 65 | |
8601f500 MS |
66 | void |
67 | delete_step_resume_breakpoint (void *arg) | |
68 | { | |
69 | struct breakpoint **breakpointp = (struct breakpoint **) arg; | |
70 | struct thread_info *tp; | |
71 | ||
72 | if (*breakpointp != NULL) | |
73 | { | |
74 | delete_breakpoint (*breakpointp); | |
75 | for (tp = thread_list; tp; tp = tp->next) | |
76 | if (tp->step_resume_breakpoint == *breakpointp) | |
77 | tp->step_resume_breakpoint = NULL; | |
78 | ||
79 | *breakpointp = NULL; | |
80 | } | |
81 | } | |
82 | ||
7c952b6d ND |
83 | static void |
84 | free_thread (struct thread_info *tp) | |
85 | { | |
86 | /* NOTE: this will take care of any left-over step_resume breakpoints, | |
4d8453a5 DJ |
87 | but not any user-specified thread-specific breakpoints. We can not |
88 | delete the breakpoint straight-off, because the inferior might not | |
89 | be stopped at the moment. */ | |
7c952b6d | 90 | if (tp->step_resume_breakpoint) |
4d8453a5 | 91 | tp->step_resume_breakpoint->disposition = disp_del_at_next_stop; |
7c952b6d ND |
92 | |
93 | /* FIXME: do I ever need to call the back-end to give it a | |
94 | chance at this private data before deleting the thread? */ | |
95 | if (tp->private) | |
b8c9b27d | 96 | xfree (tp->private); |
7c952b6d | 97 | |
b8c9b27d | 98 | xfree (tp); |
7c952b6d ND |
99 | } |
100 | ||
c906108c | 101 | void |
fba45db2 | 102 | init_thread_list (void) |
c906108c SS |
103 | { |
104 | struct thread_info *tp, *tpnext; | |
105 | ||
7c952b6d | 106 | highest_thread_num = 0; |
c906108c SS |
107 | if (!thread_list) |
108 | return; | |
109 | ||
110 | for (tp = thread_list; tp; tp = tpnext) | |
111 | { | |
112 | tpnext = tp->next; | |
7c952b6d | 113 | free_thread (tp); |
c906108c SS |
114 | } |
115 | ||
116 | thread_list = NULL; | |
c906108c SS |
117 | } |
118 | ||
0d06e24b | 119 | struct thread_info * |
93815fbf | 120 | add_thread_silent (ptid_t ptid) |
c906108c SS |
121 | { |
122 | struct thread_info *tp; | |
123 | ||
6c0d3f6a MS |
124 | tp = (struct thread_info *) xmalloc (sizeof (*tp)); |
125 | memset (tp, 0, sizeof (*tp)); | |
39f77062 | 126 | tp->ptid = ptid; |
c906108c | 127 | tp->num = ++highest_thread_num; |
c906108c SS |
128 | tp->next = thread_list; |
129 | thread_list = tp; | |
cfc01461 VP |
130 | |
131 | observer_notify_new_thread (tp); | |
132 | ||
0d06e24b | 133 | return tp; |
c906108c SS |
134 | } |
135 | ||
93815fbf | 136 | struct thread_info * |
17faa917 | 137 | add_thread_with_info (ptid_t ptid, struct private_thread_info *private) |
93815fbf VP |
138 | { |
139 | struct thread_info *result = add_thread_silent (ptid); | |
140 | ||
17faa917 DJ |
141 | result->private = private; |
142 | ||
93815fbf | 143 | if (print_thread_events) |
fd532e2e | 144 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
d4fc5b1e NR |
145 | |
146 | annotate_new_thread (); | |
93815fbf VP |
147 | return result; |
148 | } | |
149 | ||
17faa917 DJ |
150 | struct thread_info * |
151 | add_thread (ptid_t ptid) | |
152 | { | |
153 | return add_thread_with_info (ptid, NULL); | |
154 | } | |
155 | ||
c906108c | 156 | void |
39f77062 | 157 | delete_thread (ptid_t ptid) |
c906108c SS |
158 | { |
159 | struct thread_info *tp, *tpprev; | |
160 | ||
161 | tpprev = NULL; | |
162 | ||
163 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) | |
39f77062 | 164 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
165 | break; |
166 | ||
167 | if (!tp) | |
168 | return; | |
169 | ||
170 | if (tpprev) | |
171 | tpprev->next = tp->next; | |
172 | else | |
173 | thread_list = tp->next; | |
174 | ||
063bfe2e VP |
175 | observer_notify_thread_exit (tp); |
176 | ||
7c952b6d | 177 | free_thread (tp); |
c906108c SS |
178 | } |
179 | ||
180 | static struct thread_info * | |
fba45db2 | 181 | find_thread_id (int num) |
c906108c SS |
182 | { |
183 | struct thread_info *tp; | |
184 | ||
185 | for (tp = thread_list; tp; tp = tp->next) | |
186 | if (tp->num == num) | |
187 | return tp; | |
188 | ||
189 | return NULL; | |
190 | } | |
191 | ||
39f77062 | 192 | /* Find a thread_info by matching PTID. */ |
0d06e24b | 193 | struct thread_info * |
39f77062 | 194 | find_thread_pid (ptid_t ptid) |
0d06e24b JM |
195 | { |
196 | struct thread_info *tp; | |
197 | ||
198 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 199 | if (ptid_equal (tp->ptid, ptid)) |
0d06e24b JM |
200 | return tp; |
201 | ||
202 | return NULL; | |
203 | } | |
204 | ||
205 | /* | |
206 | * Thread iterator function. | |
207 | * | |
208 | * Calls a callback function once for each thread, so long as | |
209 | * the callback function returns false. If the callback function | |
210 | * returns true, the iteration will end and the current thread | |
211 | * will be returned. This can be useful for implementing a | |
212 | * search for a thread with arbitrary attributes, or for applying | |
213 | * some operation to every thread. | |
214 | * | |
215 | * FIXME: some of the existing functionality, such as | |
216 | * "Thread apply all", might be rewritten using this functionality. | |
217 | */ | |
218 | ||
219 | struct thread_info * | |
fd118b61 KB |
220 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
221 | void *data) | |
0d06e24b JM |
222 | { |
223 | struct thread_info *tp; | |
224 | ||
225 | for (tp = thread_list; tp; tp = tp->next) | |
226 | if ((*callback) (tp, data)) | |
227 | return tp; | |
228 | ||
229 | return NULL; | |
230 | } | |
231 | ||
c906108c | 232 | int |
fba45db2 | 233 | valid_thread_id (int num) |
c906108c SS |
234 | { |
235 | struct thread_info *tp; | |
236 | ||
237 | for (tp = thread_list; tp; tp = tp->next) | |
238 | if (tp->num == num) | |
239 | return 1; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | int | |
39f77062 | 245 | pid_to_thread_id (ptid_t ptid) |
c906108c SS |
246 | { |
247 | struct thread_info *tp; | |
248 | ||
249 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 250 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
251 | return tp->num; |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
39f77062 | 256 | ptid_t |
fba45db2 | 257 | thread_id_to_pid (int num) |
c906108c SS |
258 | { |
259 | struct thread_info *thread = find_thread_id (num); | |
260 | if (thread) | |
39f77062 | 261 | return thread->ptid; |
c906108c | 262 | else |
39f77062 | 263 | return pid_to_ptid (-1); |
c906108c SS |
264 | } |
265 | ||
266 | int | |
39f77062 | 267 | in_thread_list (ptid_t ptid) |
c906108c SS |
268 | { |
269 | struct thread_info *tp; | |
270 | ||
271 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 272 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
273 | return 1; |
274 | ||
275 | return 0; /* Never heard of 'im */ | |
276 | } | |
8926118c | 277 | |
8b93c638 JM |
278 | /* Print a list of thread ids currently known, and the total number of |
279 | threads. To be used from within catch_errors. */ | |
6949171e JJ |
280 | static int |
281 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) | |
8b93c638 JM |
282 | { |
283 | struct thread_info *tp; | |
284 | int num = 0; | |
3b31d625 | 285 | struct cleanup *cleanup_chain; |
8b93c638 | 286 | |
7990a578 EZ |
287 | prune_threads (); |
288 | target_find_new_threads (); | |
289 | ||
3b31d625 | 290 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
8b93c638 JM |
291 | |
292 | for (tp = thread_list; tp; tp = tp->next) | |
293 | { | |
294 | num++; | |
295 | ui_out_field_int (uiout, "thread-id", tp->num); | |
296 | } | |
297 | ||
3b31d625 | 298 | do_cleanups (cleanup_chain); |
8b93c638 JM |
299 | ui_out_field_int (uiout, "number-of-threads", num); |
300 | return GDB_RC_OK; | |
301 | } | |
302 | ||
303 | /* Official gdblib interface function to get a list of thread ids and | |
304 | the total number. */ | |
305 | enum gdb_rc | |
ce43223b | 306 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
8b93c638 | 307 | { |
b0b13bb4 DJ |
308 | if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
309 | error_message, RETURN_MASK_ALL) < 0) | |
310 | return GDB_RC_FAIL; | |
311 | return GDB_RC_OK; | |
8b93c638 | 312 | } |
c906108c SS |
313 | |
314 | /* Load infrun state for the thread PID. */ | |
315 | ||
c5aa993b | 316 | void |
6949171e JJ |
317 | load_infrun_state (ptid_t ptid, |
318 | CORE_ADDR *prev_pc, | |
6c0d3f6a | 319 | int *trap_expected, |
fba45db2 | 320 | struct breakpoint **step_resume_breakpoint, |
6949171e | 321 | CORE_ADDR *step_range_start, |
6c0d3f6a | 322 | CORE_ADDR *step_range_end, |
6949171e | 323 | struct frame_id *step_frame_id, |
ca67fcb8 | 324 | int *stepping_over_breakpoint, |
6c0d3f6a | 325 | int *stepping_through_solib_after_catch, |
fba45db2 | 326 | bpstat *stepping_through_solib_catchpoints, |
6949171e | 327 | int *current_line, |
f2c9ca08 | 328 | struct symtab **current_symtab) |
c906108c SS |
329 | { |
330 | struct thread_info *tp; | |
331 | ||
332 | /* If we can't find the thread, then we're debugging a single threaded | |
333 | process. No need to do anything in that case. */ | |
39f77062 | 334 | tp = find_thread_id (pid_to_thread_id (ptid)); |
c906108c SS |
335 | if (tp == NULL) |
336 | return; | |
337 | ||
338 | *prev_pc = tp->prev_pc; | |
6c0d3f6a | 339 | *trap_expected = tp->trap_expected; |
c906108c SS |
340 | *step_resume_breakpoint = tp->step_resume_breakpoint; |
341 | *step_range_start = tp->step_range_start; | |
342 | *step_range_end = tp->step_range_end; | |
aa0cd9c1 | 343 | *step_frame_id = tp->step_frame_id; |
ca67fcb8 | 344 | *stepping_over_breakpoint = tp->stepping_over_breakpoint; |
6949171e JJ |
345 | *stepping_through_solib_after_catch = |
346 | tp->stepping_through_solib_after_catch; | |
347 | *stepping_through_solib_catchpoints = | |
348 | tp->stepping_through_solib_catchpoints; | |
6c0d3f6a MS |
349 | *current_line = tp->current_line; |
350 | *current_symtab = tp->current_symtab; | |
c906108c SS |
351 | } |
352 | ||
353 | /* Save infrun state for the thread PID. */ | |
354 | ||
c5aa993b | 355 | void |
6949171e JJ |
356 | save_infrun_state (ptid_t ptid, |
357 | CORE_ADDR prev_pc, | |
6c0d3f6a | 358 | int trap_expected, |
fba45db2 | 359 | struct breakpoint *step_resume_breakpoint, |
6949171e | 360 | CORE_ADDR step_range_start, |
6c0d3f6a | 361 | CORE_ADDR step_range_end, |
6949171e | 362 | const struct frame_id *step_frame_id, |
ca67fcb8 | 363 | int stepping_over_breakpoint, |
6c0d3f6a | 364 | int stepping_through_solib_after_catch, |
fba45db2 | 365 | bpstat stepping_through_solib_catchpoints, |
6c0d3f6a | 366 | int current_line, |
f2c9ca08 | 367 | struct symtab *current_symtab) |
c906108c SS |
368 | { |
369 | struct thread_info *tp; | |
370 | ||
371 | /* If we can't find the thread, then we're debugging a single-threaded | |
372 | process. Nothing to do in that case. */ | |
39f77062 | 373 | tp = find_thread_id (pid_to_thread_id (ptid)); |
c906108c SS |
374 | if (tp == NULL) |
375 | return; | |
376 | ||
377 | tp->prev_pc = prev_pc; | |
6c0d3f6a | 378 | tp->trap_expected = trap_expected; |
c906108c SS |
379 | tp->step_resume_breakpoint = step_resume_breakpoint; |
380 | tp->step_range_start = step_range_start; | |
381 | tp->step_range_end = step_range_end; | |
aa0cd9c1 | 382 | tp->step_frame_id = (*step_frame_id); |
ca67fcb8 | 383 | tp->stepping_over_breakpoint = stepping_over_breakpoint; |
c906108c SS |
384 | tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch; |
385 | tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints; | |
6c0d3f6a MS |
386 | tp->current_line = current_line; |
387 | tp->current_symtab = current_symtab; | |
c906108c SS |
388 | } |
389 | ||
390 | /* Return true if TP is an active thread. */ | |
391 | static int | |
fba45db2 | 392 | thread_alive (struct thread_info *tp) |
c906108c | 393 | { |
39f77062 | 394 | if (PIDGET (tp->ptid) == -1) |
c906108c | 395 | return 0; |
39f77062 | 396 | if (!target_thread_alive (tp->ptid)) |
c906108c | 397 | { |
39f77062 | 398 | tp->ptid = pid_to_ptid (-1); /* Mark it as dead */ |
c906108c SS |
399 | return 0; |
400 | } | |
401 | return 1; | |
402 | } | |
403 | ||
404 | static void | |
fba45db2 | 405 | prune_threads (void) |
c906108c | 406 | { |
d4f3574e | 407 | struct thread_info *tp, *next; |
c906108c | 408 | |
c906108c SS |
409 | for (tp = thread_list; tp; tp = next) |
410 | { | |
411 | next = tp->next; | |
412 | if (!thread_alive (tp)) | |
39f77062 | 413 | delete_thread (tp->ptid); |
c906108c SS |
414 | } |
415 | } | |
416 | ||
e1ac3328 VP |
417 | static int main_thread_running = 0; |
418 | ||
419 | void | |
420 | set_running (ptid_t ptid, int running) | |
421 | { | |
422 | struct thread_info *tp; | |
423 | ||
424 | if (!thread_list) | |
425 | { | |
426 | /* This is one of the targets that does not add main | |
427 | thread to the thread list. Just use a single | |
428 | global flag to indicate that a thread is running. | |
429 | ||
430 | This problem is unique to ST programs. For MT programs, | |
431 | the main thread is always present in the thread list. If it's | |
432 | not, the first call to context_switch will mess up GDB internal | |
433 | state. */ | |
434 | if (running && !main_thread_running && !suppress_run_stop_observers) | |
435 | observer_notify_target_resumed (ptid); | |
436 | main_thread_running = running; | |
437 | return; | |
438 | } | |
439 | ||
440 | /* We try not to notify the observer if no thread has actually changed | |
441 | the running state -- merely to reduce the number of messages to | |
442 | frontend. Frontend is supposed to handle multiple *running just fine. */ | |
443 | if (PIDGET (ptid) == -1) | |
444 | { | |
445 | int any_started = 0; | |
446 | for (tp = thread_list; tp; tp = tp->next) | |
447 | { | |
448 | if (running && !tp->running_) | |
449 | any_started = 1; | |
450 | tp->running_ = running; | |
451 | } | |
452 | if (any_started && !suppress_run_stop_observers) | |
453 | observer_notify_target_resumed (ptid); | |
454 | } | |
455 | else | |
456 | { | |
457 | tp = find_thread_pid (ptid); | |
458 | gdb_assert (tp); | |
459 | if (running && !tp->running_ && !suppress_run_stop_observers) | |
460 | observer_notify_target_resumed (ptid); | |
461 | tp->running_ = running; | |
462 | } | |
463 | } | |
464 | ||
465 | int | |
466 | is_running (ptid_t ptid) | |
467 | { | |
468 | struct thread_info *tp; | |
469 | ||
470 | if (!thread_list) | |
471 | return main_thread_running; | |
472 | ||
473 | tp = find_thread_pid (ptid); | |
474 | gdb_assert (tp); | |
475 | return tp->running_; | |
476 | } | |
477 | ||
8e8901c5 VP |
478 | /* Prints the list of threads and their details on UIOUT. |
479 | This is a version of 'info_thread_command' suitable for | |
480 | use from MI. | |
481 | If REQESTED_THREAD is not -1, it's the GDB id of the thread | |
482 | that should be printed. Otherwise, all threads are | |
483 | printed. */ | |
484 | void | |
485 | print_thread_info (struct ui_out *uiout, int requested_thread) | |
c906108c SS |
486 | { |
487 | struct thread_info *tp; | |
39f77062 | 488 | ptid_t current_ptid; |
c5aa993b | 489 | struct frame_info *cur_frame; |
99b3d574 DP |
490 | struct cleanup *old_chain; |
491 | struct frame_id saved_frame_id; | |
0d06e24b | 492 | char *extra_info; |
8e8901c5 | 493 | int current_thread = -1; |
c906108c | 494 | |
99b3d574 DP |
495 | /* Backup current thread and selected frame. */ |
496 | saved_frame_id = get_frame_id (get_selected_frame (NULL)); | |
497 | old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id); | |
498 | ||
8e8901c5 VP |
499 | make_cleanup_ui_out_list_begin_end (uiout, "threads"); |
500 | ||
c906108c | 501 | prune_threads (); |
b83266a0 | 502 | target_find_new_threads (); |
39f77062 | 503 | current_ptid = inferior_ptid; |
c906108c SS |
504 | for (tp = thread_list; tp; tp = tp->next) |
505 | { | |
8e8901c5 VP |
506 | struct cleanup *chain2; |
507 | ||
508 | if (requested_thread != -1 && tp->num != requested_thread) | |
509 | continue; | |
510 | ||
511 | chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); | |
512 | ||
39f77062 | 513 | if (ptid_equal (tp->ptid, current_ptid)) |
8e8901c5 VP |
514 | { |
515 | current_thread = tp->num; | |
516 | ui_out_text (uiout, "* "); | |
517 | } | |
c906108c | 518 | else |
8e8901c5 | 519 | ui_out_text (uiout, " "); |
c906108c | 520 | |
8e8901c5 VP |
521 | ui_out_field_int (uiout, "id", tp->num); |
522 | ui_out_text (uiout, " "); | |
523 | ui_out_field_string (uiout, "target-id", target_tid_to_str (tp->ptid)); | |
0d06e24b JM |
524 | |
525 | extra_info = target_extra_thread_info (tp); | |
526 | if (extra_info) | |
8e8901c5 VP |
527 | { |
528 | ui_out_text (uiout, " ("); | |
529 | ui_out_field_string (uiout, "details", extra_info); | |
530 | ui_out_text (uiout, ")"); | |
531 | } | |
532 | ui_out_text (uiout, " "); | |
99b3d574 | 533 | /* That switch put us at the top of the stack (leaf frame). */ |
39f77062 | 534 | switch_to_thread (tp->ptid); |
8e8901c5 VP |
535 | print_stack_frame (get_selected_frame (NULL), |
536 | /* For MI output, print frame level. */ | |
537 | ui_out_is_mi_like_p (uiout), | |
538 | LOCATION); | |
539 | ||
540 | do_cleanups (chain2); | |
c906108c SS |
541 | } |
542 | ||
99b3d574 DP |
543 | /* Restores the current thread and the frame selected before |
544 | the "info threads" command. */ | |
545 | do_cleanups (old_chain); | |
c906108c | 546 | |
8e8901c5 VP |
547 | if (requested_thread == -1) |
548 | { | |
0bcd3e20 VP |
549 | gdb_assert (current_thread != -1 || !thread_list); |
550 | if (current_thread != -1 && ui_out_is_mi_like_p (uiout)) | |
8e8901c5 VP |
551 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
552 | } | |
553 | ||
99b3d574 DP |
554 | /* If case we were not able to find the original frame, print the |
555 | new selected frame. */ | |
556 | if (frame_find_by_id (saved_frame_id) == NULL) | |
c906108c | 557 | { |
8a3fe4f8 | 558 | warning (_("Couldn't restore frame in current thread, at frame 0")); |
8e8901c5 VP |
559 | /* For MI, we should probably have a notification about |
560 | current frame change. But this error is not very likely, so | |
561 | don't bother for now. */ | |
562 | if (!ui_out_is_mi_like_p (uiout)) | |
563 | print_stack_frame (get_selected_frame (NULL), 0, LOCATION); | |
c906108c | 564 | } |
c906108c SS |
565 | } |
566 | ||
8e8901c5 VP |
567 | |
568 | /* Print information about currently known threads | |
569 | ||
570 | * Note: this has the drawback that it _really_ switches | |
571 | * threads, which frees the frame cache. A no-side | |
572 | * effects info-threads command would be nicer. | |
573 | */ | |
574 | ||
575 | static void | |
576 | info_threads_command (char *arg, int from_tty) | |
577 | { | |
578 | print_thread_info (uiout, -1); | |
579 | } | |
580 | ||
c906108c SS |
581 | /* Switch from one thread to another. */ |
582 | ||
6a6b96b9 | 583 | void |
39f77062 | 584 | switch_to_thread (ptid_t ptid) |
c906108c | 585 | { |
39f77062 | 586 | if (ptid_equal (ptid, inferior_ptid)) |
c906108c SS |
587 | return; |
588 | ||
39f77062 | 589 | inferior_ptid = ptid; |
35f196d9 | 590 | reinit_frame_cache (); |
c906108c | 591 | registers_changed (); |
c5aa993b | 592 | stop_pc = read_pc (); |
c906108c SS |
593 | } |
594 | ||
595 | static void | |
39f77062 | 596 | restore_current_thread (ptid_t ptid) |
c906108c | 597 | { |
6949171e | 598 | if (!ptid_equal (ptid, inferior_ptid)) |
c906108c | 599 | { |
39f77062 | 600 | switch_to_thread (ptid); |
99b3d574 DP |
601 | } |
602 | } | |
603 | ||
604 | static void | |
605 | restore_selected_frame (struct frame_id a_frame_id) | |
606 | { | |
607 | struct frame_info *selected_frame_info = NULL; | |
608 | ||
609 | if (frame_id_eq (a_frame_id, null_frame_id)) | |
610 | return; | |
611 | ||
612 | if ((selected_frame_info = frame_find_by_id (a_frame_id)) != NULL) | |
613 | { | |
614 | select_frame (selected_frame_info); | |
c906108c SS |
615 | } |
616 | } | |
617 | ||
6ecce94d AC |
618 | struct current_thread_cleanup |
619 | { | |
39f77062 | 620 | ptid_t inferior_ptid; |
99b3d574 | 621 | struct frame_id selected_frame_id; |
6ecce94d AC |
622 | }; |
623 | ||
624 | static void | |
625 | do_restore_current_thread_cleanup (void *arg) | |
626 | { | |
627 | struct current_thread_cleanup *old = arg; | |
39f77062 | 628 | restore_current_thread (old->inferior_ptid); |
99b3d574 | 629 | restore_selected_frame (old->selected_frame_id); |
b8c9b27d | 630 | xfree (old); |
6ecce94d AC |
631 | } |
632 | ||
6208b47d | 633 | struct cleanup * |
99b3d574 DP |
634 | make_cleanup_restore_current_thread (ptid_t inferior_ptid, |
635 | struct frame_id a_frame_id) | |
6ecce94d AC |
636 | { |
637 | struct current_thread_cleanup *old | |
638 | = xmalloc (sizeof (struct current_thread_cleanup)); | |
39f77062 | 639 | old->inferior_ptid = inferior_ptid; |
99b3d574 | 640 | old->selected_frame_id = a_frame_id; |
6ecce94d AC |
641 | return make_cleanup (do_restore_current_thread_cleanup, old); |
642 | } | |
643 | ||
c906108c SS |
644 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
645 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist | |
646 | of two numbers seperated by a hyphen. Examples: | |
647 | ||
c5aa993b JM |
648 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
649 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 | |
650 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads | |
651 | */ | |
c906108c SS |
652 | |
653 | static void | |
fba45db2 | 654 | thread_apply_all_command (char *cmd, int from_tty) |
c906108c SS |
655 | { |
656 | struct thread_info *tp; | |
657 | struct cleanup *old_chain; | |
e35ce267 CF |
658 | struct cleanup *saved_cmd_cleanup_chain; |
659 | char *saved_cmd; | |
99b3d574 DP |
660 | struct frame_id saved_frame_id; |
661 | ptid_t current_ptid; | |
662 | int thread_has_changed = 0; | |
c906108c SS |
663 | |
664 | if (cmd == NULL || *cmd == '\000') | |
8a3fe4f8 | 665 | error (_("Please specify a command following the thread ID list")); |
99b3d574 DP |
666 | |
667 | current_ptid = inferior_ptid; | |
668 | saved_frame_id = get_frame_id (get_selected_frame (NULL)); | |
669 | old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id); | |
c906108c | 670 | |
e9d196c5 MS |
671 | /* It is safe to update the thread list now, before |
672 | traversing it for "thread apply all". MVS */ | |
673 | target_find_new_threads (); | |
674 | ||
e35ce267 CF |
675 | /* Save a copy of the command in case it is clobbered by |
676 | execute_command */ | |
5b616ba1 | 677 | saved_cmd = xstrdup (cmd); |
b8c9b27d | 678 | saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd); |
c906108c SS |
679 | for (tp = thread_list; tp; tp = tp->next) |
680 | if (thread_alive (tp)) | |
681 | { | |
39f77062 | 682 | switch_to_thread (tp->ptid); |
a3f17187 | 683 | printf_filtered (_("\nThread %d (%s):\n"), |
6949171e | 684 | tp->num, target_tid_to_str (inferior_ptid)); |
c906108c | 685 | execute_command (cmd, from_tty); |
6949171e | 686 | strcpy (cmd, saved_cmd); /* Restore exact command used previously */ |
c906108c | 687 | } |
6ecce94d | 688 | |
99b3d574 DP |
689 | if (!ptid_equal (current_ptid, inferior_ptid)) |
690 | thread_has_changed = 1; | |
691 | ||
e35ce267 | 692 | do_cleanups (saved_cmd_cleanup_chain); |
6ecce94d | 693 | do_cleanups (old_chain); |
99b3d574 DP |
694 | /* Print stack frame only if we changed thread. */ |
695 | if (thread_has_changed) | |
696 | print_stack_frame (get_current_frame (), 1, SRC_LINE); | |
697 | ||
c906108c SS |
698 | } |
699 | ||
700 | static void | |
fba45db2 | 701 | thread_apply_command (char *tidlist, int from_tty) |
c906108c SS |
702 | { |
703 | char *cmd; | |
704 | char *p; | |
705 | struct cleanup *old_chain; | |
e35ce267 CF |
706 | struct cleanup *saved_cmd_cleanup_chain; |
707 | char *saved_cmd; | |
99b3d574 DP |
708 | struct frame_id saved_frame_id; |
709 | ptid_t current_ptid; | |
710 | int thread_has_changed = 0; | |
c906108c SS |
711 | |
712 | if (tidlist == NULL || *tidlist == '\000') | |
8a3fe4f8 | 713 | error (_("Please specify a thread ID list")); |
c906108c | 714 | |
c5aa993b | 715 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
c906108c SS |
716 | |
717 | if (*cmd == '\000') | |
8a3fe4f8 | 718 | error (_("Please specify a command following the thread ID list")); |
c906108c | 719 | |
99b3d574 DP |
720 | current_ptid = inferior_ptid; |
721 | saved_frame_id = get_frame_id (get_selected_frame (NULL)); | |
722 | old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id); | |
c906108c | 723 | |
e35ce267 CF |
724 | /* Save a copy of the command in case it is clobbered by |
725 | execute_command */ | |
5b616ba1 | 726 | saved_cmd = xstrdup (cmd); |
b8c9b27d | 727 | saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd); |
c906108c SS |
728 | while (tidlist < cmd) |
729 | { | |
730 | struct thread_info *tp; | |
731 | int start, end; | |
732 | ||
733 | start = strtol (tidlist, &p, 10); | |
734 | if (p == tidlist) | |
8a3fe4f8 | 735 | error (_("Error parsing %s"), tidlist); |
c906108c SS |
736 | tidlist = p; |
737 | ||
738 | while (*tidlist == ' ' || *tidlist == '\t') | |
739 | tidlist++; | |
740 | ||
741 | if (*tidlist == '-') /* Got a range of IDs? */ | |
742 | { | |
c5aa993b | 743 | tidlist++; /* Skip the - */ |
c906108c SS |
744 | end = strtol (tidlist, &p, 10); |
745 | if (p == tidlist) | |
8a3fe4f8 | 746 | error (_("Error parsing %s"), tidlist); |
c906108c SS |
747 | tidlist = p; |
748 | ||
749 | while (*tidlist == ' ' || *tidlist == '\t') | |
750 | tidlist++; | |
751 | } | |
752 | else | |
753 | end = start; | |
754 | ||
755 | for (; start <= end; start++) | |
756 | { | |
757 | tp = find_thread_id (start); | |
758 | ||
759 | if (!tp) | |
8a3fe4f8 | 760 | warning (_("Unknown thread %d."), start); |
c906108c | 761 | else if (!thread_alive (tp)) |
8a3fe4f8 | 762 | warning (_("Thread %d has terminated."), start); |
c906108c SS |
763 | else |
764 | { | |
39f77062 | 765 | switch_to_thread (tp->ptid); |
a3f17187 | 766 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
39f77062 | 767 | target_tid_to_str (inferior_ptid)); |
c906108c | 768 | execute_command (cmd, from_tty); |
e35ce267 | 769 | strcpy (cmd, saved_cmd); /* Restore exact command used previously */ |
c906108c SS |
770 | } |
771 | } | |
772 | } | |
6ecce94d | 773 | |
99b3d574 DP |
774 | if (!ptid_equal (current_ptid, inferior_ptid)) |
775 | thread_has_changed = 1; | |
776 | ||
e35ce267 | 777 | do_cleanups (saved_cmd_cleanup_chain); |
6ecce94d | 778 | do_cleanups (old_chain); |
99b3d574 DP |
779 | /* Print stack frame only if we changed thread. */ |
780 | if (thread_has_changed) | |
781 | print_stack_frame (get_current_frame (), 1, SRC_LINE); | |
c906108c SS |
782 | } |
783 | ||
784 | /* Switch to the specified thread. Will dispatch off to thread_apply_command | |
785 | if prefix of arg is `apply'. */ | |
786 | ||
787 | static void | |
fba45db2 | 788 | thread_command (char *tidstr, int from_tty) |
c906108c | 789 | { |
c906108c SS |
790 | if (!tidstr) |
791 | { | |
792 | /* Don't generate an error, just say which thread is current. */ | |
793 | if (target_has_stack) | |
a3f17187 | 794 | printf_filtered (_("[Current thread is %d (%s)]\n"), |
39f77062 | 795 | pid_to_thread_id (inferior_ptid), |
007d08bb | 796 | target_tid_to_str (inferior_ptid)); |
c906108c | 797 | else |
8a3fe4f8 | 798 | error (_("No stack.")); |
c906108c SS |
799 | return; |
800 | } | |
c5394b80 | 801 | |
b8fa951a | 802 | annotate_thread_changed (); |
ce43223b | 803 | gdb_thread_select (uiout, tidstr, NULL); |
c5394b80 JM |
804 | } |
805 | ||
93815fbf VP |
806 | /* Print notices when new threads are attached and detached. */ |
807 | int print_thread_events = 1; | |
808 | static void | |
809 | show_print_thread_events (struct ui_file *file, int from_tty, | |
810 | struct cmd_list_element *c, const char *value) | |
811 | { | |
812 | fprintf_filtered (file, _("\ | |
813 | Printing of thread events is %s.\n"), | |
814 | value); | |
815 | } | |
816 | ||
c5394b80 | 817 | static int |
6949171e | 818 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
c5394b80 JM |
819 | { |
820 | int num; | |
821 | struct thread_info *tp; | |
822 | ||
81490ea1 | 823 | num = value_as_long (parse_and_eval (tidstr)); |
c906108c SS |
824 | |
825 | tp = find_thread_id (num); | |
826 | ||
8b93c638 | 827 | if (!tp) |
8a3fe4f8 | 828 | error (_("Thread ID %d not known."), num); |
c906108c SS |
829 | |
830 | if (!thread_alive (tp)) | |
8a3fe4f8 | 831 | error (_("Thread ID %d has terminated."), num); |
c906108c | 832 | |
39f77062 | 833 | switch_to_thread (tp->ptid); |
c906108c | 834 | |
8b93c638 | 835 | ui_out_text (uiout, "[Switching to thread "); |
39f77062 | 836 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
8b93c638 | 837 | ui_out_text (uiout, " ("); |
39f77062 | 838 | ui_out_text (uiout, target_tid_to_str (inferior_ptid)); |
8b93c638 | 839 | ui_out_text (uiout, ")]"); |
c5394b80 | 840 | |
b04f3ab4 | 841 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
c5394b80 JM |
842 | return GDB_RC_OK; |
843 | } | |
844 | ||
845 | enum gdb_rc | |
ce43223b | 846 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
c5394b80 | 847 | { |
b0b13bb4 DJ |
848 | if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
849 | error_message, RETURN_MASK_ALL) < 0) | |
850 | return GDB_RC_FAIL; | |
851 | return GDB_RC_OK; | |
c906108c SS |
852 | } |
853 | ||
854 | /* Commands with a prefix of `thread'. */ | |
855 | struct cmd_list_element *thread_cmd_list = NULL; | |
856 | ||
857 | void | |
fba45db2 | 858 | _initialize_thread (void) |
c906108c SS |
859 | { |
860 | static struct cmd_list_element *thread_apply_list = NULL; | |
c906108c SS |
861 | |
862 | add_info ("threads", info_threads_command, | |
1bedd215 | 863 | _("IDs of currently known threads.")); |
c906108c | 864 | |
1bedd215 AC |
865 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
866 | Use this command to switch between threads.\n\ | |
867 | The new thread ID must be currently known."), | |
868 | &thread_cmd_list, "thread ", 1, &cmdlist); | |
c906108c SS |
869 | |
870 | add_prefix_cmd ("apply", class_run, thread_apply_command, | |
1bedd215 | 871 | _("Apply a command to a list of threads."), |
ad21ceb0 | 872 | &thread_apply_list, "thread apply ", 1, &thread_cmd_list); |
c906108c SS |
873 | |
874 | add_cmd ("all", class_run, thread_apply_all_command, | |
1a966eab | 875 | _("Apply a command to all threads."), &thread_apply_list); |
c906108c SS |
876 | |
877 | if (!xdb_commands) | |
878 | add_com_alias ("t", "thread", class_run, 1); | |
93815fbf VP |
879 | |
880 | add_setshow_boolean_cmd ("thread-events", no_class, | |
881 | &print_thread_events, _("\ | |
11c68c47 EZ |
882 | Set printing of thread events (such as thread start and exit)."), _("\ |
883 | Show printing of thread events (such as thread start and exit)."), NULL, | |
93815fbf VP |
884 | NULL, |
885 | show_print_thread_events, | |
886 | &setprintlist, &showprintlist); | |
c906108c | 887 | } |