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
,
448 int *proceed_to_finish
,
451 enum target_signal
*stop_signal
,
454 struct thread_info
*tp
;
456 /* If we can't find the thread, then we're debugging a single threaded
457 process. No need to do anything in that case. */
458 tp
= find_thread_id (pid_to_thread_id (ptid
));
462 /* In all-stop mode, these are global state, while in non-stop mode,
463 they are per thread. */
466 *continuations
= tp
->continuations
;
467 tp
->continuations
= NULL
;
468 *intermediate_continuations
= tp
->intermediate_continuations
;
469 tp
->intermediate_continuations
= NULL
;
470 *proceed_to_finish
= tp
->proceed_to_finish
;
471 *stop_step
= tp
->stop_step
;
472 *step_multi
= tp
->step_multi
;
473 *stop_signal
= tp
->stop_signal
;
475 /* Swap instead of copy, so we only have to update one of
477 *stop_bpstat
= tp
->stop_bpstat
;
482 /* Save infrun state for the thread PID. */
485 save_infrun_state (ptid_t ptid
,
486 struct continuation
*continuations
,
487 struct continuation
*intermediate_continuations
,
488 int proceed_to_finish
,
491 enum target_signal stop_signal
,
494 struct thread_info
*tp
;
496 /* If we can't find the thread, then we're debugging a single-threaded
497 process. Nothing to do in that case. */
498 tp
= find_thread_id (pid_to_thread_id (ptid
));
502 /* In all-stop mode, these are global state, while in non-stop mode,
503 they are per thread. */
506 tp
->continuations
= continuations
;
507 tp
->intermediate_continuations
= intermediate_continuations
;
508 tp
->proceed_to_finish
= proceed_to_finish
;
509 tp
->stop_step
= stop_step
;
510 tp
->step_multi
= step_multi
;
511 tp
->stop_signal
= stop_signal
;
512 tp
->stop_bpstat
= stop_bpstat
;
516 /* Return true if TP is an active thread. */
518 thread_alive (struct thread_info
*tp
)
520 if (tp
->state_
== THREAD_EXITED
)
522 if (!target_thread_alive (tp
->ptid
))
530 struct thread_info
*tp
, *next
;
532 for (tp
= thread_list
; tp
; tp
= next
)
535 if (!thread_alive (tp
))
536 delete_thread (tp
->ptid
);
541 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
543 struct thread_info
* tp
= find_thread_pid (old_ptid
);
546 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
550 set_running (ptid_t ptid
, int running
)
552 struct thread_info
*tp
;
556 /* This is one of the targets that does not add main
557 thread to the thread list. Just use a single
558 global flag to indicate that a thread is running.
560 This problem is unique to ST programs. For MT programs,
561 the main thread is always present in the thread list. If it's
562 not, the first call to context_switch will mess up GDB internal
565 && main_thread_state
!= THREAD_RUNNING
566 && !suppress_resume_observer
)
567 observer_notify_target_resumed (ptid
);
568 main_thread_state
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
572 /* We try not to notify the observer if no thread has actually changed
573 the running state -- merely to reduce the number of messages to
574 frontend. Frontend is supposed to handle multiple *running just fine. */
575 if (PIDGET (ptid
) == -1)
578 for (tp
= thread_list
; tp
; tp
= tp
->next
)
580 if (tp
->state_
== THREAD_EXITED
)
582 if (running
&& tp
->state_
== THREAD_STOPPED
)
584 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
586 if (any_started
&& !suppress_resume_observer
)
587 observer_notify_target_resumed (ptid
);
592 tp
= find_thread_pid (ptid
);
594 gdb_assert (tp
->state_
!= THREAD_EXITED
);
595 if (running
&& tp
->state_
== THREAD_STOPPED
)
597 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
598 if (started
&& !suppress_resume_observer
)
599 observer_notify_target_resumed (ptid
);
604 is_thread_state (ptid_t ptid
, enum thread_state state
)
606 struct thread_info
*tp
;
608 if (!target_has_execution
)
612 return main_thread_state
== state
;
614 tp
= find_thread_pid (ptid
);
616 return tp
->state_
== state
;
620 is_stopped (ptid_t ptid
)
622 /* Without execution, this property is always true. */
623 if (!target_has_execution
)
626 return is_thread_state (ptid
, THREAD_STOPPED
);
630 is_exited (ptid_t ptid
)
632 /* Without execution, this property is always false. */
633 if (!target_has_execution
)
636 return is_thread_state (ptid
, THREAD_EXITED
);
640 is_running (ptid_t ptid
)
642 /* Without execution, this property is always false. */
643 if (!target_has_execution
)
646 return is_thread_state (ptid
, THREAD_RUNNING
);
652 struct thread_info
*tp
;
654 if (!target_has_execution
)
658 return main_thread_state
== THREAD_RUNNING
;
660 for (tp
= thread_list
; tp
; tp
= tp
->next
)
661 if (tp
->state_
== THREAD_RUNNING
)
668 is_executing (ptid_t ptid
)
670 struct thread_info
*tp
;
672 if (!target_has_execution
)
676 return main_thread_executing
;
678 tp
= find_thread_pid (ptid
);
680 return tp
->executing_
;
684 set_executing (ptid_t ptid
, int executing
)
686 struct thread_info
*tp
;
690 /* This target does not add the main thread to the thread list.
691 Use a global flag to indicate that the thread is
693 main_thread_executing
= executing
;
697 if (PIDGET (ptid
) == -1)
699 for (tp
= thread_list
; tp
; tp
= tp
->next
)
700 tp
->executing_
= executing
;
704 tp
= find_thread_pid (ptid
);
706 tp
->executing_
= executing
;
710 /* Prints the list of threads and their details on UIOUT.
711 This is a version of 'info_thread_command' suitable for
713 If REQUESTED_THREAD is not -1, it's the GDB id of the thread
714 that should be printed. Otherwise, all threads are
717 print_thread_info (struct ui_out
*uiout
, int requested_thread
)
719 struct thread_info
*tp
;
721 struct cleanup
*old_chain
;
723 int current_thread
= -1;
726 target_find_new_threads ();
727 current_ptid
= inferior_ptid
;
729 /* We'll be switching threads temporarily. */
730 old_chain
= make_cleanup_restore_current_thread ();
732 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
733 for (tp
= thread_list
; tp
; tp
= tp
->next
)
735 struct cleanup
*chain2
;
737 if (requested_thread
!= -1 && tp
->num
!= requested_thread
)
740 if (ptid_equal (tp
->ptid
, current_ptid
))
741 current_thread
= tp
->num
;
743 if (tp
->state_
== THREAD_EXITED
)
746 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
748 if (ptid_equal (tp
->ptid
, current_ptid
))
749 ui_out_text (uiout
, "* ");
751 ui_out_text (uiout
, " ");
753 ui_out_field_int (uiout
, "id", tp
->num
);
754 ui_out_text (uiout
, " ");
755 ui_out_field_string (uiout
, "target-id", target_tid_to_str (tp
->ptid
));
757 if (tp
->state_
!= THREAD_EXITED
)
759 extra_info
= target_extra_thread_info (tp
);
762 ui_out_text (uiout
, " (");
763 ui_out_field_string (uiout
, "details", extra_info
);
764 ui_out_text (uiout
, ")");
766 ui_out_text (uiout
, " ");
769 if (tp
->state_
== THREAD_RUNNING
)
770 ui_out_text (uiout
, "(running)\n");
773 /* The switch below puts us at the top of the stack (leaf
775 switch_to_thread (tp
->ptid
);
776 print_stack_frame (get_selected_frame (NULL
),
777 /* For MI output, print frame level. */
778 ui_out_is_mi_like_p (uiout
),
782 if (ui_out_is_mi_like_p (uiout
))
784 char *state
= "stopped";
785 if (tp
->state_
== THREAD_EXITED
)
787 else if (tp
->state_
== THREAD_RUNNING
)
789 ui_out_field_string (uiout
, "state", state
);
792 do_cleanups (chain2
);
795 /* Restores the current thread and the frame selected before
796 the "info threads" command. */
797 do_cleanups (old_chain
);
799 if (requested_thread
== -1)
801 gdb_assert (current_thread
!= -1
803 if (current_thread
!= -1 && ui_out_is_mi_like_p (uiout
))
804 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
806 if (current_thread
!= -1 && is_exited (current_ptid
))
807 ui_out_message (uiout
, 0, "\n\
808 The current thread <Thread ID %d> has terminated. See `help thread'.\n",
814 /* Print information about currently known threads
816 * Note: this has the drawback that it _really_ switches
817 * threads, which frees the frame cache. A no-side
818 * effects info-threads command would be nicer.
822 info_threads_command (char *arg
, int from_tty
)
824 print_thread_info (uiout
, -1);
827 /* Switch from one thread to another. */
830 switch_to_thread (ptid_t ptid
)
832 if (ptid_equal (ptid
, inferior_ptid
))
835 inferior_ptid
= ptid
;
836 reinit_frame_cache ();
837 registers_changed ();
839 /* We don't check for is_stopped, because we're called at times
840 while in the TARGET_RUNNING state, e.g., while handling an
842 if (!is_exited (ptid
) && !is_executing (ptid
))
843 stop_pc
= read_pc ();
845 stop_pc
= ~(CORE_ADDR
) 0;
849 restore_current_thread (ptid_t ptid
)
851 if (!ptid_equal (ptid
, inferior_ptid
))
854 context_switch_to (ptid
);
856 switch_to_thread (ptid
);
861 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
863 struct frame_info
*frame
= NULL
;
866 gdb_assert (frame_level
>= 0);
868 /* Restore by level first, check if the frame id is the same as
869 expected. If that fails, try restoring by frame id. If that
870 fails, nothing to do, just warn the user. */
873 frame
= find_relative_frame (get_current_frame (), &count
);
876 /* Either the frame ids match, of they're both invalid. The
877 latter case is not failsafe, but since it's highly unlikely
878 the search by level finds the wrong frame, it's 99.9(9)% of
879 the time (for all practical purposes) safe. */
880 && (frame_id_eq (get_frame_id (frame
), a_frame_id
)
881 /* Note: could be better to check every frame_id
882 member for equality here. */
883 || (!frame_id_p (get_frame_id (frame
))
884 && !frame_id_p (a_frame_id
))))
886 /* Cool, all is fine. */
887 select_frame (frame
);
891 frame
= frame_find_by_id (a_frame_id
);
894 /* Cool, refound it. */
895 select_frame (frame
);
899 /* Nothing else to do, the frame layout really changed. Select the
900 innermost stack frame. */
901 select_frame (get_current_frame ());
904 if (!ui_out_is_mi_like_p (uiout
))
907 Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
909 /* For MI, we should probably have a notification about
910 current frame change. But this error is not very
911 likely, so don't bother for now. */
912 print_stack_frame (get_selected_frame (NULL
), 1, SRC_LINE
);
916 struct current_thread_cleanup
918 ptid_t inferior_ptid
;
919 struct frame_id selected_frame_id
;
920 int selected_frame_level
;
925 do_restore_current_thread_cleanup (void *arg
)
927 struct thread_info
*tp
;
928 struct current_thread_cleanup
*old
= arg
;
929 restore_current_thread (old
->inferior_ptid
);
931 /* The running state of the originally selected thread may have
932 changed, so we have to recheck it here. */
934 && is_stopped (inferior_ptid
)
935 && target_has_registers
937 && target_has_memory
)
938 restore_selected_frame (old
->selected_frame_id
,
939 old
->selected_frame_level
);
943 restore_current_thread_cleanup_dtor (void *arg
)
945 struct current_thread_cleanup
*old
= arg
;
946 struct thread_info
*tp
;
947 tp
= find_thread_pid (old
->inferior_ptid
);
954 make_cleanup_restore_current_thread (void)
956 struct thread_info
*tp
;
957 struct frame_info
*frame
;
958 struct current_thread_cleanup
*old
;
960 old
= xmalloc (sizeof (struct current_thread_cleanup
));
961 old
->inferior_ptid
= inferior_ptid
;
962 old
->was_stopped
= is_stopped (inferior_ptid
);
964 && target_has_registers
966 && target_has_memory
)
967 frame
= get_selected_frame (NULL
);
971 old
->selected_frame_id
= get_frame_id (frame
);
972 old
->selected_frame_level
= frame_relative_level (frame
);
974 tp
= find_thread_pid (inferior_ptid
);
978 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
979 restore_current_thread_cleanup_dtor
);
982 /* Apply a GDB command to a list of threads. List syntax is a whitespace
983 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
984 of two numbers seperated by a hyphen. Examples:
986 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
987 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
988 thread apply all p x/i $pc Apply x/i $pc cmd to all threads
992 thread_apply_all_command (char *cmd
, int from_tty
)
994 struct thread_info
*tp
;
995 struct cleanup
*old_chain
;
998 if (cmd
== NULL
|| *cmd
== '\000')
999 error (_("Please specify a command following the thread ID list"));
1002 target_find_new_threads ();
1004 old_chain
= make_cleanup_restore_current_thread ();
1006 /* Save a copy of the command in case it is clobbered by
1008 saved_cmd
= xstrdup (cmd
);
1009 make_cleanup (xfree
, saved_cmd
);
1010 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1011 if (thread_alive (tp
))
1014 context_switch_to (tp
->ptid
);
1016 switch_to_thread (tp
->ptid
);
1018 printf_filtered (_("\nThread %d (%s):\n"),
1019 tp
->num
, target_tid_to_str (inferior_ptid
));
1020 execute_command (cmd
, from_tty
);
1021 strcpy (cmd
, saved_cmd
); /* Restore exact command used previously */
1024 do_cleanups (old_chain
);
1028 thread_apply_command (char *tidlist
, int from_tty
)
1032 struct cleanup
*old_chain
;
1035 if (tidlist
== NULL
|| *tidlist
== '\000')
1036 error (_("Please specify a thread ID list"));
1038 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha (*cmd
); cmd
++);
1041 error (_("Please specify a command following the thread ID list"));
1043 /* Save a copy of the command in case it is clobbered by
1045 saved_cmd
= xstrdup (cmd
);
1046 old_chain
= make_cleanup (xfree
, saved_cmd
);
1047 while (tidlist
< cmd
)
1049 struct thread_info
*tp
;
1052 start
= strtol (tidlist
, &p
, 10);
1054 error (_("Error parsing %s"), tidlist
);
1057 while (*tidlist
== ' ' || *tidlist
== '\t')
1060 if (*tidlist
== '-') /* Got a range of IDs? */
1062 tidlist
++; /* Skip the - */
1063 end
= strtol (tidlist
, &p
, 10);
1065 error (_("Error parsing %s"), tidlist
);
1068 while (*tidlist
== ' ' || *tidlist
== '\t')
1074 make_cleanup_restore_current_thread ();
1076 for (; start
<= end
; start
++)
1078 tp
= find_thread_id (start
);
1081 warning (_("Unknown thread %d."), start
);
1082 else if (!thread_alive (tp
))
1083 warning (_("Thread %d has terminated."), start
);
1087 context_switch_to (tp
->ptid
);
1089 switch_to_thread (tp
->ptid
);
1091 printf_filtered (_("\nThread %d (%s):\n"), tp
->num
,
1092 target_tid_to_str (inferior_ptid
));
1093 execute_command (cmd
, from_tty
);
1095 /* Restore exact command used previously. */
1096 strcpy (cmd
, saved_cmd
);
1101 do_cleanups (old_chain
);
1104 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1105 if prefix of arg is `apply'. */
1108 thread_command (char *tidstr
, int from_tty
)
1112 if (target_has_stack
)
1114 if (is_exited (inferior_ptid
))
1115 printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
1116 pid_to_thread_id (inferior_ptid
),
1117 target_tid_to_str (inferior_ptid
));
1119 printf_filtered (_("[Current thread is %d (%s)]\n"),
1120 pid_to_thread_id (inferior_ptid
),
1121 target_tid_to_str (inferior_ptid
));
1124 error (_("No stack."));
1128 annotate_thread_changed ();
1129 gdb_thread_select (uiout
, tidstr
, NULL
);
1132 /* Print notices when new threads are attached and detached. */
1133 int print_thread_events
= 1;
1135 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1136 struct cmd_list_element
*c
, const char *value
)
1138 fprintf_filtered (file
, _("\
1139 Printing of thread events is %s.\n"),
1144 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr
)
1147 struct thread_info
*tp
;
1149 num
= value_as_long (parse_and_eval (tidstr
));
1151 tp
= find_thread_id (num
);
1154 error (_("Thread ID %d not known."), num
);
1156 if (!thread_alive (tp
))
1157 error (_("Thread ID %d has terminated."), num
);
1160 context_switch_to (tp
->ptid
);
1162 switch_to_thread (tp
->ptid
);
1164 ui_out_text (uiout
, "[Switching to thread ");
1165 ui_out_field_int (uiout
, "new-thread-id", pid_to_thread_id (inferior_ptid
));
1166 ui_out_text (uiout
, " (");
1167 ui_out_text (uiout
, target_tid_to_str (inferior_ptid
));
1168 ui_out_text (uiout
, ")]");
1170 /* Note that we can't reach this with an exited thread, due to the
1171 thread_alive check above. */
1172 if (tp
->state_
== THREAD_RUNNING
)
1173 ui_out_text (uiout
, "(running)\n");
1175 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1177 /* Since the current thread may have changed, see if there is any
1178 exited thread we can now delete. */
1185 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
1187 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
1188 error_message
, RETURN_MASK_ALL
) < 0)
1193 /* Commands with a prefix of `thread'. */
1194 struct cmd_list_element
*thread_cmd_list
= NULL
;
1197 _initialize_thread (void)
1199 static struct cmd_list_element
*thread_apply_list
= NULL
;
1200 struct cmd_list_element
*c
;
1202 c
= add_info ("threads", info_threads_command
,
1203 _("IDs of currently known threads."));
1204 set_cmd_no_selected_thread_ok (c
);
1206 c
= add_prefix_cmd ("thread", class_run
, thread_command
, _("\
1207 Use this command to switch between threads.\n\
1208 The new thread ID must be currently known."),
1209 &thread_cmd_list
, "thread ", 1, &cmdlist
);
1210 set_cmd_no_selected_thread_ok (c
);
1212 c
= add_prefix_cmd ("apply", class_run
, thread_apply_command
,
1213 _("Apply a command to a list of threads."),
1214 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
1215 set_cmd_no_selected_thread_ok (c
);
1217 c
= add_cmd ("all", class_run
, thread_apply_all_command
,
1218 _("Apply a command to all threads."), &thread_apply_list
);
1219 set_cmd_no_selected_thread_ok (c
);
1222 add_com_alias ("t", "thread", class_run
, 1);
1224 add_setshow_boolean_cmd ("thread-events", no_class
,
1225 &print_thread_events
, _("\
1226 Set printing of thread events (such as thread start and exit)."), _("\
1227 Show printing of thread events (such as thread start and exit)."), NULL
,
1229 show_print_thread_events
,
1230 &setprintlist
, &showprintlist
);