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