1 /* Multi-process/thread control for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
6 Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
8 This file is part of GDB.
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
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
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.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "gdbthread.h"
31 #include "exceptions.h"
36 #include "gdb_string.h"
39 #include <sys/types.h>
44 #include "cli/cli-decode.h"
46 /* Definition of struct thread_info exported to gdbthread.h */
48 /* Prototypes for exported functions. */
50 void _initialize_thread (void);
52 /* Prototypes for local functions. */
54 static struct thread_info
*thread_list
= NULL
;
55 static int highest_thread_num
;
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);
62 static void restore_current_thread (ptid_t
);
63 static void prune_threads (void);
65 /* Frontend view of the thread state. Possible extensions: stepping,
66 finishing, until(ling),... */
74 static enum thread_state main_thread_state
= THREAD_STOPPED
;
75 static int main_thread_executing
= 0;
77 extern struct thread_info
*
78 inferior_thread (void)
80 struct thread_info
*tp
= find_thread_pid (inferior_ptid
);
86 delete_step_resume_breakpoint (struct thread_info
*tp
)
88 if (tp
&& tp
->step_resume_breakpoint
)
90 delete_breakpoint (tp
->step_resume_breakpoint
);
91 tp
->step_resume_breakpoint
= NULL
;
96 clear_thread_inferior_resources (struct thread_info
*tp
)
98 /* NOTE: this will take care of any left-over step_resume breakpoints,
99 but not any user-specified thread-specific breakpoints. We can not
100 delete the breakpoint straight-off, because the inferior might not
101 be stopped at the moment. */
102 if (tp
->step_resume_breakpoint
)
104 tp
->step_resume_breakpoint
->disposition
= disp_del_at_next_stop
;
105 tp
->step_resume_breakpoint
= NULL
;
108 bpstat_clear (&tp
->stop_bpstat
);
112 free_thread (struct thread_info
*tp
)
114 clear_thread_inferior_resources (tp
);
116 /* FIXME: do I ever need to call the back-end to give it a
117 chance at this private data before deleting the thread? */
125 init_thread_list (void)
127 struct thread_info
*tp
, *tpnext
;
129 highest_thread_num
= 0;
130 main_thread_state
= THREAD_STOPPED
;
131 main_thread_executing
= 0;
136 for (tp
= thread_list
; tp
; tp
= tpnext
)
146 add_thread_silent (ptid_t ptid
)
148 struct thread_info
*tp
;
150 tp
= find_thread_pid (ptid
);
152 /* Found an old thread with the same id. It has to be dead,
153 otherwise we wouldn't be adding a new thread with the same id.
154 The OS is reusing this id --- delete it, and recreate a new
157 /* In addition to deleting the thread, if this is the current
158 thread, then we need to also get rid of the current infrun
159 context, and take care that delete_thread doesn't really
160 delete the thread if it is inferior_ptid. Create a new
161 template thread in the list with an invalid ptid, context
162 switch to it, delete the original thread, reset the new
163 thread's ptid, and switch to it. */
165 if (ptid_equal (inferior_ptid
, ptid
))
167 tp
= xmalloc (sizeof (*tp
));
168 memset (tp
, 0, sizeof (*tp
));
169 tp
->ptid
= minus_one_ptid
;
170 tp
->num
= ++highest_thread_num
;
171 tp
->next
= thread_list
;
173 context_switch_to (minus_one_ptid
);
175 /* Now we can delete it. */
176 delete_thread (ptid
);
178 /* Since the context is already set to this new thread,
179 reset its ptid, and reswitch inferior_ptid to it. */
181 switch_to_thread (ptid
);
183 observer_notify_new_thread (tp
);
189 /* Just go ahead and delete it. */
190 delete_thread (ptid
);
193 tp
= (struct thread_info
*) xmalloc (sizeof (*tp
));
194 memset (tp
, 0, sizeof (*tp
));
196 tp
->num
= ++highest_thread_num
;
197 tp
->next
= thread_list
;
200 observer_notify_new_thread (tp
);
206 add_thread_with_info (ptid_t ptid
, struct private_thread_info
*private)
208 struct thread_info
*result
= add_thread_silent (ptid
);
210 result
->private = private;
212 if (print_thread_events
)
213 printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid
));
215 annotate_new_thread ();
220 add_thread (ptid_t ptid
)
222 return add_thread_with_info (ptid
, NULL
);
225 /* Delete thread PTID. If SILENT, don't notify the observer of this
228 delete_thread_1 (ptid_t ptid
, int silent
)
230 struct thread_info
*tp
, *tpprev
;
234 for (tp
= thread_list
; tp
; tpprev
= tp
, tp
= tp
->next
)
235 if (ptid_equal (tp
->ptid
, ptid
))
241 /* If this is the current thread, or there's code out there that
242 relies on it existing (refcount > 0) we can't delete yet. Mark
243 it as exited, and notify it. */
245 || ptid_equal (tp
->ptid
, inferior_ptid
))
247 if (tp
->state_
!= THREAD_EXITED
)
250 observer_notify_thread_exit (tp
);
252 /* Tag it as exited. */
253 tp
->state_
= THREAD_EXITED
;
255 /* Clear breakpoints, etc. associated with this thread. */
256 clear_thread_inferior_resources (tp
);
259 /* Will be really deleted some other time. */
264 tpprev
->next
= tp
->next
;
266 thread_list
= tp
->next
;
268 /* Notify thread exit, but only if we haven't already. */
269 if (!silent
&& tp
->state_
!= THREAD_EXITED
)
270 observer_notify_thread_exit (tp
);
275 /* Delete thread PTID and notify of thread exit. If this is
276 inferior_ptid, don't actually delete it, but tag it as exited and
277 do the notification. If PTID is the user selected thread, clear
280 delete_thread (ptid_t ptid
)
282 delete_thread_1 (ptid
, 0 /* not silent */);
286 delete_thread_silent (ptid_t ptid
)
288 delete_thread_1 (ptid
, 1 /* silent */);
292 find_thread_id (int num
)
294 struct thread_info
*tp
;
296 for (tp
= thread_list
; tp
; tp
= tp
->next
)
303 /* Find a thread_info by matching PTID. */
305 find_thread_pid (ptid_t ptid
)
307 struct thread_info
*tp
;
309 for (tp
= thread_list
; tp
; tp
= tp
->next
)
310 if (ptid_equal (tp
->ptid
, ptid
))
317 * Thread iterator function.
319 * Calls a callback function once for each thread, so long as
320 * the callback function returns false. If the callback function
321 * returns true, the iteration will end and the current thread
322 * will be returned. This can be useful for implementing a
323 * search for a thread with arbitrary attributes, or for applying
324 * some operation to every thread.
326 * FIXME: some of the existing functionality, such as
327 * "Thread apply all", might be rewritten using this functionality.
331 iterate_over_threads (int (*callback
) (struct thread_info
*, void *),
334 struct thread_info
*tp
, *next
;
336 for (tp
= thread_list
; tp
; tp
= next
)
339 if ((*callback
) (tp
, data
))
350 struct thread_info
*tp
;
352 for (tp
= thread_list
; tp
; tp
= tp
->next
)
359 valid_thread_id (int num
)
361 struct thread_info
*tp
;
363 for (tp
= thread_list
; tp
; tp
= tp
->next
)
371 pid_to_thread_id (ptid_t ptid
)
373 struct thread_info
*tp
;
375 for (tp
= thread_list
; tp
; tp
= tp
->next
)
376 if (ptid_equal (tp
->ptid
, ptid
))
383 thread_id_to_pid (int num
)
385 struct thread_info
*thread
= find_thread_id (num
);
389 return pid_to_ptid (-1);
393 in_thread_list (ptid_t ptid
)
395 struct thread_info
*tp
;
397 for (tp
= thread_list
; tp
; tp
= tp
->next
)
398 if (ptid_equal (tp
->ptid
, ptid
))
401 return 0; /* Never heard of 'im */
404 /* Print a list of thread ids currently known, and the total number of
405 threads. To be used from within catch_errors. */
407 do_captured_list_thread_ids (struct ui_out
*uiout
, void *arg
)
409 struct thread_info
*tp
;
411 struct cleanup
*cleanup_chain
;
414 target_find_new_threads ();
416 cleanup_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "thread-ids");
418 for (tp
= thread_list
; tp
; tp
= tp
->next
)
420 if (tp
->state_
== THREAD_EXITED
)
423 ui_out_field_int (uiout
, "thread-id", tp
->num
);
426 do_cleanups (cleanup_chain
);
427 ui_out_field_int (uiout
, "number-of-threads", num
);
431 /* Official gdblib interface function to get a list of thread ids and
434 gdb_list_thread_ids (struct ui_out
*uiout
, char **error_message
)
436 if (catch_exceptions_with_msg (uiout
, do_captured_list_thread_ids
, NULL
,
437 error_message
, RETURN_MASK_ALL
) < 0)
442 /* Load infrun state for the thread PID. */
445 load_infrun_state (ptid_t ptid
,
446 struct continuation
**continuations
,
447 struct continuation
**intermediate_continuations
,
450 struct thread_info
*tp
;
452 /* If we can't find the thread, then we're debugging a single threaded
453 process. No need to do anything in that case. */
454 tp
= find_thread_id (pid_to_thread_id (ptid
));
458 /* In all-stop mode, these are global state, while in non-stop mode,
459 they are per thread. */
462 *continuations
= tp
->continuations
;
463 tp
->continuations
= NULL
;
464 *intermediate_continuations
= tp
->intermediate_continuations
;
465 tp
->intermediate_continuations
= NULL
;
466 *stop_step
= tp
->stop_step
;
470 /* Save infrun state for the thread PID. */
473 save_infrun_state (ptid_t ptid
,
474 struct continuation
*continuations
,
475 struct continuation
*intermediate_continuations
,
478 struct thread_info
*tp
;
480 /* If we can't find the thread, then we're debugging a single-threaded
481 process. Nothing to do in that case. */
482 tp
= find_thread_id (pid_to_thread_id (ptid
));
486 /* In all-stop mode, these are global state, while in non-stop mode,
487 they are per thread. */
490 tp
->continuations
= continuations
;
491 tp
->intermediate_continuations
= intermediate_continuations
;
492 tp
->stop_step
= stop_step
;
496 /* Return true if TP is an active thread. */
498 thread_alive (struct thread_info
*tp
)
500 if (tp
->state_
== THREAD_EXITED
)
502 if (!target_thread_alive (tp
->ptid
))
510 struct thread_info
*tp
, *next
;
512 for (tp
= thread_list
; tp
; tp
= next
)
515 if (!thread_alive (tp
))
516 delete_thread (tp
->ptid
);
521 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
523 struct thread_info
* tp
= find_thread_pid (old_ptid
);
526 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
530 set_running (ptid_t ptid
, int running
)
532 struct thread_info
*tp
;
536 /* This is one of the targets that does not add main
537 thread to the thread list. Just use a single
538 global flag to indicate that a thread is running.
540 This problem is unique to ST programs. For MT programs,
541 the main thread is always present in the thread list. If it's
542 not, the first call to context_switch will mess up GDB internal
545 && main_thread_state
!= THREAD_RUNNING
546 && !suppress_resume_observer
)
547 observer_notify_target_resumed (ptid
);
548 main_thread_state
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
552 /* We try not to notify the observer if no thread has actually changed
553 the running state -- merely to reduce the number of messages to
554 frontend. Frontend is supposed to handle multiple *running just fine. */
555 if (PIDGET (ptid
) == -1)
558 for (tp
= thread_list
; tp
; tp
= tp
->next
)
560 if (tp
->state_
== THREAD_EXITED
)
562 if (running
&& tp
->state_
== THREAD_STOPPED
)
564 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
566 if (any_started
&& !suppress_resume_observer
)
567 observer_notify_target_resumed (ptid
);
572 tp
= find_thread_pid (ptid
);
574 gdb_assert (tp
->state_
!= THREAD_EXITED
);
575 if (running
&& tp
->state_
== THREAD_STOPPED
)
577 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
578 if (started
&& !suppress_resume_observer
)
579 observer_notify_target_resumed (ptid
);
584 is_thread_state (ptid_t ptid
, enum thread_state state
)
586 struct thread_info
*tp
;
588 if (!target_has_execution
)
592 return main_thread_state
== state
;
594 tp
= find_thread_pid (ptid
);
596 return tp
->state_
== state
;
600 is_stopped (ptid_t ptid
)
602 /* Without execution, this property is always true. */
603 if (!target_has_execution
)
606 return is_thread_state (ptid
, THREAD_STOPPED
);
610 is_exited (ptid_t ptid
)
612 /* Without execution, this property is always false. */
613 if (!target_has_execution
)
616 return is_thread_state (ptid
, THREAD_EXITED
);
620 is_running (ptid_t ptid
)
622 /* Without execution, this property is always false. */
623 if (!target_has_execution
)
626 return is_thread_state (ptid
, THREAD_RUNNING
);
632 struct thread_info
*tp
;
634 if (!target_has_execution
)
638 return main_thread_state
== THREAD_RUNNING
;
640 for (tp
= thread_list
; tp
; tp
= tp
->next
)
641 if (tp
->state_
== THREAD_RUNNING
)
648 is_executing (ptid_t ptid
)
650 struct thread_info
*tp
;
652 if (!target_has_execution
)
656 return main_thread_executing
;
658 tp
= find_thread_pid (ptid
);
660 return tp
->executing_
;
664 set_executing (ptid_t ptid
, int executing
)
666 struct thread_info
*tp
;
670 /* This target does not add the main thread to the thread list.
671 Use a global flag to indicate that the thread is
673 main_thread_executing
= executing
;
677 if (PIDGET (ptid
) == -1)
679 for (tp
= thread_list
; tp
; tp
= tp
->next
)
680 tp
->executing_
= executing
;
684 tp
= find_thread_pid (ptid
);
686 tp
->executing_
= executing
;
690 /* Prints the list of threads and their details on UIOUT.
691 This is a version of 'info_thread_command' suitable for
693 If REQUESTED_THREAD is not -1, it's the GDB id of the thread
694 that should be printed. Otherwise, all threads are
697 print_thread_info (struct ui_out
*uiout
, int requested_thread
)
699 struct thread_info
*tp
;
701 struct cleanup
*old_chain
;
703 int current_thread
= -1;
706 target_find_new_threads ();
707 current_ptid
= inferior_ptid
;
709 /* We'll be switching threads temporarily. */
710 old_chain
= make_cleanup_restore_current_thread ();
712 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
713 for (tp
= thread_list
; tp
; tp
= tp
->next
)
715 struct cleanup
*chain2
;
717 if (requested_thread
!= -1 && tp
->num
!= requested_thread
)
720 if (ptid_equal (tp
->ptid
, current_ptid
))
721 current_thread
= tp
->num
;
723 if (tp
->state_
== THREAD_EXITED
)
726 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
728 if (ptid_equal (tp
->ptid
, current_ptid
))
729 ui_out_text (uiout
, "* ");
731 ui_out_text (uiout
, " ");
733 ui_out_field_int (uiout
, "id", tp
->num
);
734 ui_out_text (uiout
, " ");
735 ui_out_field_string (uiout
, "target-id", target_tid_to_str (tp
->ptid
));
737 if (tp
->state_
!= THREAD_EXITED
)
739 extra_info
= target_extra_thread_info (tp
);
742 ui_out_text (uiout
, " (");
743 ui_out_field_string (uiout
, "details", extra_info
);
744 ui_out_text (uiout
, ")");
746 ui_out_text (uiout
, " ");
749 if (tp
->state_
== THREAD_RUNNING
)
750 ui_out_text (uiout
, "(running)\n");
753 /* The switch below puts us at the top of the stack (leaf
755 switch_to_thread (tp
->ptid
);
756 print_stack_frame (get_selected_frame (NULL
),
757 /* For MI output, print frame level. */
758 ui_out_is_mi_like_p (uiout
),
762 if (ui_out_is_mi_like_p (uiout
))
764 char *state
= "stopped";
765 if (tp
->state_
== THREAD_EXITED
)
767 else if (tp
->state_
== THREAD_RUNNING
)
769 ui_out_field_string (uiout
, "state", state
);
772 do_cleanups (chain2
);
775 /* Restores the current thread and the frame selected before
776 the "info threads" command. */
777 do_cleanups (old_chain
);
779 if (requested_thread
== -1)
781 gdb_assert (current_thread
!= -1
783 if (current_thread
!= -1 && ui_out_is_mi_like_p (uiout
))
784 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
786 if (current_thread
!= -1 && is_exited (current_ptid
))
787 ui_out_message (uiout
, 0, "\n\
788 The current thread <Thread ID %d> has terminated. See `help thread'.\n",
794 /* Print information about currently known threads
796 * Note: this has the drawback that it _really_ switches
797 * threads, which frees the frame cache. A no-side
798 * effects info-threads command would be nicer.
802 info_threads_command (char *arg
, int from_tty
)
804 print_thread_info (uiout
, -1);
807 /* Switch from one thread to another. */
810 switch_to_thread (ptid_t ptid
)
812 if (ptid_equal (ptid
, inferior_ptid
))
815 inferior_ptid
= ptid
;
816 reinit_frame_cache ();
817 registers_changed ();
819 /* We don't check for is_stopped, because we're called at times
820 while in the TARGET_RUNNING state, e.g., while handling an
822 if (!is_exited (ptid
) && !is_executing (ptid
))
823 stop_pc
= read_pc ();
825 stop_pc
= ~(CORE_ADDR
) 0;
829 restore_current_thread (ptid_t ptid
)
831 if (!ptid_equal (ptid
, inferior_ptid
))
834 context_switch_to (ptid
);
836 switch_to_thread (ptid
);
841 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
843 struct frame_info
*frame
= NULL
;
846 gdb_assert (frame_level
>= 0);
848 /* Restore by level first, check if the frame id is the same as
849 expected. If that fails, try restoring by frame id. If that
850 fails, nothing to do, just warn the user. */
853 frame
= find_relative_frame (get_current_frame (), &count
);
856 /* Either the frame ids match, of they're both invalid. The
857 latter case is not failsafe, but since it's highly unlikely
858 the search by level finds the wrong frame, it's 99.9(9)% of
859 the time (for all practical purposes) safe. */
860 && (frame_id_eq (get_frame_id (frame
), a_frame_id
)
861 /* Note: could be better to check every frame_id
862 member for equality here. */
863 || (!frame_id_p (get_frame_id (frame
))
864 && !frame_id_p (a_frame_id
))))
866 /* Cool, all is fine. */
867 select_frame (frame
);
871 frame
= frame_find_by_id (a_frame_id
);
874 /* Cool, refound it. */
875 select_frame (frame
);
879 /* Nothing else to do, the frame layout really changed. Select the
880 innermost stack frame. */
881 select_frame (get_current_frame ());
884 if (!ui_out_is_mi_like_p (uiout
))
887 Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
889 /* For MI, we should probably have a notification about
890 current frame change. But this error is not very
891 likely, so don't bother for now. */
892 print_stack_frame (get_selected_frame (NULL
), 1, SRC_LINE
);
896 struct current_thread_cleanup
898 ptid_t inferior_ptid
;
899 struct frame_id selected_frame_id
;
900 int selected_frame_level
;
905 do_restore_current_thread_cleanup (void *arg
)
907 struct thread_info
*tp
;
908 struct current_thread_cleanup
*old
= arg
;
909 restore_current_thread (old
->inferior_ptid
);
911 /* The running state of the originally selected thread may have
912 changed, so we have to recheck it here. */
914 && is_stopped (inferior_ptid
)
915 && target_has_registers
917 && target_has_memory
)
918 restore_selected_frame (old
->selected_frame_id
,
919 old
->selected_frame_level
);
923 restore_current_thread_cleanup_dtor (void *arg
)
925 struct current_thread_cleanup
*old
= arg
;
926 struct thread_info
*tp
;
927 tp
= find_thread_pid (old
->inferior_ptid
);
934 make_cleanup_restore_current_thread (void)
936 struct thread_info
*tp
;
937 struct frame_info
*frame
;
938 struct current_thread_cleanup
*old
;
940 old
= xmalloc (sizeof (struct current_thread_cleanup
));
941 old
->inferior_ptid
= inferior_ptid
;
942 old
->was_stopped
= is_stopped (inferior_ptid
);
944 && target_has_registers
946 && target_has_memory
)
947 frame
= get_selected_frame (NULL
);
951 old
->selected_frame_id
= get_frame_id (frame
);
952 old
->selected_frame_level
= frame_relative_level (frame
);
954 tp
= find_thread_pid (inferior_ptid
);
958 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
959 restore_current_thread_cleanup_dtor
);
962 /* Apply a GDB command to a list of threads. List syntax is a whitespace
963 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
964 of two numbers seperated by a hyphen. Examples:
966 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
967 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
968 thread apply all p x/i $pc Apply x/i $pc cmd to all threads
972 thread_apply_all_command (char *cmd
, int from_tty
)
974 struct thread_info
*tp
;
975 struct cleanup
*old_chain
;
978 if (cmd
== NULL
|| *cmd
== '\000')
979 error (_("Please specify a command following the thread ID list"));
982 target_find_new_threads ();
984 old_chain
= make_cleanup_restore_current_thread ();
986 /* Save a copy of the command in case it is clobbered by
988 saved_cmd
= xstrdup (cmd
);
989 make_cleanup (xfree
, saved_cmd
);
990 for (tp
= thread_list
; tp
; tp
= tp
->next
)
991 if (thread_alive (tp
))
994 context_switch_to (tp
->ptid
);
996 switch_to_thread (tp
->ptid
);
998 printf_filtered (_("\nThread %d (%s):\n"),
999 tp
->num
, target_tid_to_str (inferior_ptid
));
1000 execute_command (cmd
, from_tty
);
1001 strcpy (cmd
, saved_cmd
); /* Restore exact command used previously */
1004 do_cleanups (old_chain
);
1008 thread_apply_command (char *tidlist
, int from_tty
)
1012 struct cleanup
*old_chain
;
1015 if (tidlist
== NULL
|| *tidlist
== '\000')
1016 error (_("Please specify a thread ID list"));
1018 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha (*cmd
); cmd
++);
1021 error (_("Please specify a command following the thread ID list"));
1023 /* Save a copy of the command in case it is clobbered by
1025 saved_cmd
= xstrdup (cmd
);
1026 old_chain
= make_cleanup (xfree
, saved_cmd
);
1027 while (tidlist
< cmd
)
1029 struct thread_info
*tp
;
1032 start
= strtol (tidlist
, &p
, 10);
1034 error (_("Error parsing %s"), tidlist
);
1037 while (*tidlist
== ' ' || *tidlist
== '\t')
1040 if (*tidlist
== '-') /* Got a range of IDs? */
1042 tidlist
++; /* Skip the - */
1043 end
= strtol (tidlist
, &p
, 10);
1045 error (_("Error parsing %s"), tidlist
);
1048 while (*tidlist
== ' ' || *tidlist
== '\t')
1054 make_cleanup_restore_current_thread ();
1056 for (; start
<= end
; start
++)
1058 tp
= find_thread_id (start
);
1061 warning (_("Unknown thread %d."), start
);
1062 else if (!thread_alive (tp
))
1063 warning (_("Thread %d has terminated."), start
);
1067 context_switch_to (tp
->ptid
);
1069 switch_to_thread (tp
->ptid
);
1071 printf_filtered (_("\nThread %d (%s):\n"), tp
->num
,
1072 target_tid_to_str (inferior_ptid
));
1073 execute_command (cmd
, from_tty
);
1075 /* Restore exact command used previously. */
1076 strcpy (cmd
, saved_cmd
);
1081 do_cleanups (old_chain
);
1084 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1085 if prefix of arg is `apply'. */
1088 thread_command (char *tidstr
, int from_tty
)
1092 if (target_has_stack
)
1094 if (is_exited (inferior_ptid
))
1095 printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
1096 pid_to_thread_id (inferior_ptid
),
1097 target_tid_to_str (inferior_ptid
));
1099 printf_filtered (_("[Current thread is %d (%s)]\n"),
1100 pid_to_thread_id (inferior_ptid
),
1101 target_tid_to_str (inferior_ptid
));
1104 error (_("No stack."));
1108 annotate_thread_changed ();
1109 gdb_thread_select (uiout
, tidstr
, NULL
);
1112 /* Print notices when new threads are attached and detached. */
1113 int print_thread_events
= 1;
1115 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1116 struct cmd_list_element
*c
, const char *value
)
1118 fprintf_filtered (file
, _("\
1119 Printing of thread events is %s.\n"),
1124 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr
)
1127 struct thread_info
*tp
;
1129 num
= value_as_long (parse_and_eval (tidstr
));
1131 tp
= find_thread_id (num
);
1134 error (_("Thread ID %d not known."), num
);
1136 if (!thread_alive (tp
))
1137 error (_("Thread ID %d has terminated."), num
);
1140 context_switch_to (tp
->ptid
);
1142 switch_to_thread (tp
->ptid
);
1144 ui_out_text (uiout
, "[Switching to thread ");
1145 ui_out_field_int (uiout
, "new-thread-id", pid_to_thread_id (inferior_ptid
));
1146 ui_out_text (uiout
, " (");
1147 ui_out_text (uiout
, target_tid_to_str (inferior_ptid
));
1148 ui_out_text (uiout
, ")]");
1150 /* Note that we can't reach this with an exited thread, due to the
1151 thread_alive check above. */
1152 if (tp
->state_
== THREAD_RUNNING
)
1153 ui_out_text (uiout
, "(running)\n");
1155 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1157 /* Since the current thread may have changed, see if there is any
1158 exited thread we can now delete. */
1165 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
1167 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
1168 error_message
, RETURN_MASK_ALL
) < 0)
1173 /* Commands with a prefix of `thread'. */
1174 struct cmd_list_element
*thread_cmd_list
= NULL
;
1177 _initialize_thread (void)
1179 static struct cmd_list_element
*thread_apply_list
= NULL
;
1180 struct cmd_list_element
*c
;
1182 c
= add_info ("threads", info_threads_command
,
1183 _("IDs of currently known threads."));
1184 set_cmd_no_selected_thread_ok (c
);
1186 c
= add_prefix_cmd ("thread", class_run
, thread_command
, _("\
1187 Use this command to switch between threads.\n\
1188 The new thread ID must be currently known."),
1189 &thread_cmd_list
, "thread ", 1, &cmdlist
);
1190 set_cmd_no_selected_thread_ok (c
);
1192 c
= add_prefix_cmd ("apply", class_run
, thread_apply_command
,
1193 _("Apply a command to a list of threads."),
1194 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
1195 set_cmd_no_selected_thread_ok (c
);
1197 c
= add_cmd ("all", class_run
, thread_apply_all_command
,
1198 _("Apply a command to all threads."), &thread_apply_list
);
1199 set_cmd_no_selected_thread_ok (c
);
1202 add_com_alias ("t", "thread", class_run
, 1);
1204 add_setshow_boolean_cmd ("thread-events", no_class
,
1205 &print_thread_events
, _("\
1206 Set printing of thread events (such as thread start and exit)."), _("\
1207 Show printing of thread events (such as thread start and exit)."), NULL
,
1209 show_print_thread_events
,
1210 &setprintlist
, &showprintlist
);