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, 2009
5 Free Software Foundation, Inc.
7 Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
31 #include "gdbthread.h"
32 #include "exceptions.h"
37 #include "gdb_string.h"
40 #include <sys/types.h>
45 #include "cli/cli-decode.h"
47 /* Definition of struct thread_info exported to gdbthread.h */
49 /* Prototypes for exported functions. */
51 void _initialize_thread (void);
53 /* Prototypes for local functions. */
55 static struct thread_info
*thread_list
= NULL
;
56 static int highest_thread_num
;
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);
63 static void restore_current_thread (ptid_t
);
64 static void prune_threads (void);
66 /* Frontend view of the thread state. Possible extensions: stepping,
67 finishing, until(ling),... */
75 extern struct thread_info
*
76 inferior_thread (void)
78 struct thread_info
*tp
= find_thread_pid (inferior_ptid
);
84 delete_step_resume_breakpoint (struct thread_info
*tp
)
86 if (tp
&& tp
->step_resume_breakpoint
)
88 delete_breakpoint (tp
->step_resume_breakpoint
);
89 tp
->step_resume_breakpoint
= NULL
;
94 clear_thread_inferior_resources (struct thread_info
*tp
)
96 /* NOTE: this will take care of any left-over step_resume breakpoints,
97 but not any user-specified thread-specific breakpoints. We can not
98 delete the breakpoint straight-off, because the inferior might not
99 be stopped at the moment. */
100 if (tp
->step_resume_breakpoint
)
102 tp
->step_resume_breakpoint
->disposition
= disp_del_at_next_stop
;
103 tp
->step_resume_breakpoint
= NULL
;
106 bpstat_clear (&tp
->stop_bpstat
);
108 discard_all_intermediate_continuations_thread (tp
);
109 discard_all_continuations_thread (tp
);
113 free_thread (struct thread_info
*tp
)
115 clear_thread_inferior_resources (tp
);
117 /* FIXME: do I ever need to call the back-end to give it a
118 chance at this private data before deleting the thread? */
126 init_thread_list (void)
128 struct thread_info
*tp
, *tpnext
;
130 highest_thread_num
= 0;
135 for (tp
= thread_list
; tp
; tp
= tpnext
)
145 add_thread_silent (ptid_t ptid
)
147 struct thread_info
*tp
;
149 tp
= find_thread_pid (ptid
);
151 /* Found an old thread with the same id. It has to be dead,
152 otherwise we wouldn't be adding a new thread with the same id.
153 The OS is reusing this id --- delete it, and recreate a new
156 /* In addition to deleting the thread, if this is the current
157 thread, then we need to take care that delete_thread doesn't
158 really delete the thread if it is inferior_ptid. Create a
159 new template thread in the list with an invalid ptid, switch
160 to it, delete the original thread, reset the new thread's
161 ptid, and switch to it. */
163 if (ptid_equal (inferior_ptid
, ptid
))
165 tp
= xmalloc (sizeof (*tp
));
166 memset (tp
, 0, sizeof (*tp
));
167 tp
->ptid
= minus_one_ptid
;
168 tp
->num
= ++highest_thread_num
;
169 tp
->next
= thread_list
;
172 /* Make switch_to_thread not read from the thread. */
173 tp
->state_
= THREAD_EXITED
;
174 switch_to_thread (minus_one_ptid
);
176 /* Now we can delete it. */
177 delete_thread (ptid
);
179 /* Now reset its ptid, and reswitch inferior_ptid to it. */
181 tp
->state_
= THREAD_STOPPED
;
182 switch_to_thread (ptid
);
184 observer_notify_new_thread (tp
);
190 /* Just go ahead and delete it. */
191 delete_thread (ptid
);
194 tp
= (struct thread_info
*) xmalloc (sizeof (*tp
));
195 memset (tp
, 0, sizeof (*tp
));
197 tp
->num
= ++highest_thread_num
;
198 tp
->next
= thread_list
;
201 observer_notify_new_thread (tp
);
207 add_thread_with_info (ptid_t ptid
, struct private_thread_info
*private)
209 struct thread_info
*result
= add_thread_silent (ptid
);
211 result
->private = private;
213 if (print_thread_events
)
214 printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid
));
216 annotate_new_thread ();
221 add_thread (ptid_t ptid
)
223 return add_thread_with_info (ptid
, NULL
);
226 /* Delete thread PTID. If SILENT, don't notify the observer of this
229 delete_thread_1 (ptid_t ptid
, int silent
)
231 struct thread_info
*tp
, *tpprev
;
235 for (tp
= thread_list
; tp
; tpprev
= tp
, tp
= tp
->next
)
236 if (ptid_equal (tp
->ptid
, ptid
))
242 /* If this is the current thread, or there's code out there that
243 relies on it existing (refcount > 0) we can't delete yet. Mark
244 it as exited, and notify it. */
246 || ptid_equal (tp
->ptid
, inferior_ptid
))
248 if (tp
->state_
!= THREAD_EXITED
)
251 observer_notify_thread_exit (tp
);
253 /* Tag it as exited. */
254 tp
->state_
= THREAD_EXITED
;
256 /* Clear breakpoints, etc. associated with this thread. */
257 clear_thread_inferior_resources (tp
);
260 /* Will be really deleted some other time. */
265 tpprev
->next
= tp
->next
;
267 thread_list
= tp
->next
;
269 /* Notify thread exit, but only if we haven't already. */
270 if (!silent
&& tp
->state_
!= THREAD_EXITED
)
271 observer_notify_thread_exit (tp
);
276 /* Delete thread PTID and notify of thread exit. If this is
277 inferior_ptid, don't actually delete it, but tag it as exited and
278 do the notification. If PTID is the user selected thread, clear
281 delete_thread (ptid_t ptid
)
283 delete_thread_1 (ptid
, 0 /* not silent */);
287 delete_thread_silent (ptid_t ptid
)
289 delete_thread_1 (ptid
, 1 /* silent */);
293 find_thread_id (int num
)
295 struct thread_info
*tp
;
297 for (tp
= thread_list
; tp
; tp
= tp
->next
)
304 /* Find a thread_info by matching PTID. */
306 find_thread_pid (ptid_t ptid
)
308 struct thread_info
*tp
;
310 for (tp
= thread_list
; tp
; tp
= tp
->next
)
311 if (ptid_equal (tp
->ptid
, ptid
))
318 * Thread iterator function.
320 * Calls a callback function once for each thread, so long as
321 * the callback function returns false. If the callback function
322 * returns true, the iteration will end and the current thread
323 * will be returned. This can be useful for implementing a
324 * search for a thread with arbitrary attributes, or for applying
325 * some operation to every thread.
327 * FIXME: some of the existing functionality, such as
328 * "Thread apply all", might be rewritten using this functionality.
332 iterate_over_threads (int (*callback
) (struct thread_info
*, void *),
335 struct thread_info
*tp
, *next
;
337 for (tp
= thread_list
; tp
; tp
= next
)
340 if ((*callback
) (tp
, data
))
351 struct thread_info
*tp
;
353 for (tp
= thread_list
; tp
; tp
= tp
->next
)
360 valid_thread_id (int num
)
362 struct thread_info
*tp
;
364 for (tp
= thread_list
; tp
; tp
= tp
->next
)
372 pid_to_thread_id (ptid_t ptid
)
374 struct thread_info
*tp
;
376 for (tp
= thread_list
; tp
; tp
= tp
->next
)
377 if (ptid_equal (tp
->ptid
, ptid
))
384 thread_id_to_pid (int num
)
386 struct thread_info
*thread
= find_thread_id (num
);
390 return pid_to_ptid (-1);
394 in_thread_list (ptid_t ptid
)
396 struct thread_info
*tp
;
398 for (tp
= thread_list
; tp
; tp
= tp
->next
)
399 if (ptid_equal (tp
->ptid
, ptid
))
402 return 0; /* Never heard of 'im */
405 /* Print a list of thread ids currently known, and the total number of
406 threads. To be used from within catch_errors. */
408 do_captured_list_thread_ids (struct ui_out
*uiout
, void *arg
)
410 struct thread_info
*tp
;
412 struct cleanup
*cleanup_chain
;
415 target_find_new_threads ();
417 cleanup_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "thread-ids");
419 for (tp
= thread_list
; tp
; tp
= tp
->next
)
421 if (tp
->state_
== THREAD_EXITED
)
424 ui_out_field_int (uiout
, "thread-id", tp
->num
);
427 do_cleanups (cleanup_chain
);
428 ui_out_field_int (uiout
, "number-of-threads", num
);
432 /* Official gdblib interface function to get a list of thread ids and
435 gdb_list_thread_ids (struct ui_out
*uiout
, char **error_message
)
437 if (catch_exceptions_with_msg (uiout
, do_captured_list_thread_ids
, NULL
,
438 error_message
, RETURN_MASK_ALL
) < 0)
443 /* Return true if TP is an active thread. */
445 thread_alive (struct thread_info
*tp
)
447 if (tp
->state_
== THREAD_EXITED
)
449 if (!target_thread_alive (tp
->ptid
))
457 struct thread_info
*tp
, *next
;
459 for (tp
= thread_list
; tp
; tp
= next
)
462 if (!thread_alive (tp
))
463 delete_thread (tp
->ptid
);
468 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
470 struct inferior
*inf
;
471 struct thread_info
*tp
;
473 /* It can happen that what we knew as the target inferior id
474 changes. E.g, target remote may only discover the remote process
475 pid after adding the inferior to GDB's list. */
476 inf
= find_inferior_pid (ptid_get_pid (old_ptid
));
477 inf
->pid
= ptid_get_pid (new_ptid
);
479 tp
= find_thread_pid (old_ptid
);
482 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
486 set_running (ptid_t ptid
, int running
)
488 struct thread_info
*tp
;
490 /* We try not to notify the observer if no thread has actually changed
491 the running state -- merely to reduce the number of messages to
492 frontend. Frontend is supposed to handle multiple *running just fine. */
493 if (PIDGET (ptid
) == -1)
496 for (tp
= thread_list
; tp
; tp
= tp
->next
)
498 if (tp
->state_
== THREAD_EXITED
)
500 if (running
&& tp
->state_
== THREAD_STOPPED
)
502 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
504 if (any_started
&& !suppress_resume_observer
)
505 observer_notify_target_resumed (ptid
);
510 tp
= find_thread_pid (ptid
);
512 gdb_assert (tp
->state_
!= THREAD_EXITED
);
513 if (running
&& tp
->state_
== THREAD_STOPPED
)
515 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
516 if (started
&& !suppress_resume_observer
)
517 observer_notify_target_resumed (ptid
);
522 is_thread_state (ptid_t ptid
, enum thread_state state
)
524 struct thread_info
*tp
;
526 if (!target_has_execution
)
529 tp
= find_thread_pid (ptid
);
531 return tp
->state_
== state
;
535 is_stopped (ptid_t ptid
)
537 /* Without execution, this property is always true. */
538 if (!target_has_execution
)
541 return is_thread_state (ptid
, THREAD_STOPPED
);
545 is_exited (ptid_t ptid
)
547 /* Without execution, this property is always false. */
548 if (!target_has_execution
)
551 return is_thread_state (ptid
, THREAD_EXITED
);
555 is_running (ptid_t ptid
)
557 /* Without execution, this property is always false. */
558 if (!target_has_execution
)
561 return is_thread_state (ptid
, THREAD_RUNNING
);
567 struct thread_info
*tp
;
569 if (!target_has_execution
)
572 for (tp
= thread_list
; tp
; tp
= tp
->next
)
573 if (tp
->state_
== THREAD_RUNNING
)
580 is_executing (ptid_t ptid
)
582 struct thread_info
*tp
;
584 if (!target_has_execution
)
587 tp
= find_thread_pid (ptid
);
589 return tp
->executing_
;
593 set_executing (ptid_t ptid
, int executing
)
595 struct thread_info
*tp
;
597 if (PIDGET (ptid
) == -1)
599 for (tp
= thread_list
; tp
; tp
= tp
->next
)
600 tp
->executing_
= executing
;
604 tp
= find_thread_pid (ptid
);
606 tp
->executing_
= executing
;
611 set_stop_requested (ptid_t ptid
, int stop
)
613 struct thread_info
*tp
;
614 int all
= ptid_equal (ptid
, minus_one_ptid
);
616 if (all
|| ptid_is_pid (ptid
))
618 for (tp
= thread_list
; tp
; tp
= tp
->next
)
619 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
620 tp
->stop_requested
= stop
;
624 tp
= find_thread_pid (ptid
);
626 tp
->stop_requested
= stop
;
629 /* Call the stop requested observer so other components of GDB can
630 react to this request. */
632 observer_notify_thread_stop_requested (ptid
);
635 /* Prints the list of threads and their details on UIOUT.
636 This is a version of 'info_thread_command' suitable for
638 If REQUESTED_THREAD is not -1, it's the GDB id of the thread
639 that should be printed. Otherwise, all threads are
641 If PID is not -1, only print threads from the process PID.
642 Otherwise, threads from all attached PIDs are printed.
643 If both REQUESTED_THREAD and PID are not -1, then the thread
644 is printed if it belongs to the specified process. Otherwise,
645 an error is raised. */
647 print_thread_info (struct ui_out
*uiout
, int requested_thread
, int pid
)
649 struct thread_info
*tp
;
651 struct cleanup
*old_chain
;
653 int current_thread
= -1;
656 target_find_new_threads ();
657 current_ptid
= inferior_ptid
;
659 /* We'll be switching threads temporarily. */
660 old_chain
= make_cleanup_restore_current_thread ();
662 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
663 for (tp
= thread_list
; tp
; tp
= tp
->next
)
665 struct cleanup
*chain2
;
667 if (requested_thread
!= -1 && tp
->num
!= requested_thread
)
670 if (pid
!= -1 && PIDGET (tp
->ptid
) != pid
)
672 if (requested_thread
!= -1)
673 error (_("Requested thread not found in requested process"));
677 if (ptid_equal (tp
->ptid
, current_ptid
))
678 current_thread
= tp
->num
;
680 if (tp
->state_
== THREAD_EXITED
)
683 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
685 if (ptid_equal (tp
->ptid
, current_ptid
))
686 ui_out_text (uiout
, "* ");
688 ui_out_text (uiout
, " ");
690 ui_out_field_int (uiout
, "id", tp
->num
);
691 ui_out_text (uiout
, " ");
692 ui_out_field_string (uiout
, "target-id", target_tid_to_str (tp
->ptid
));
694 extra_info
= target_extra_thread_info (tp
);
697 ui_out_text (uiout
, " (");
698 ui_out_field_string (uiout
, "details", extra_info
);
699 ui_out_text (uiout
, ")");
701 ui_out_text (uiout
, " ");
703 if (tp
->state_
== THREAD_RUNNING
)
704 ui_out_text (uiout
, "(running)\n");
707 /* The switch below puts us at the top of the stack (leaf
709 switch_to_thread (tp
->ptid
);
710 print_stack_frame (get_selected_frame (NULL
),
711 /* For MI output, print frame level. */
712 ui_out_is_mi_like_p (uiout
),
716 if (ui_out_is_mi_like_p (uiout
))
718 char *state
= "stopped";
719 if (tp
->state_
== THREAD_RUNNING
)
721 ui_out_field_string (uiout
, "state", state
);
724 do_cleanups (chain2
);
727 /* Restores the current thread and the frame selected before
728 the "info threads" command. */
729 do_cleanups (old_chain
);
731 if (pid
== -1 && requested_thread
== -1 )
733 gdb_assert (current_thread
!= -1
735 if (current_thread
!= -1 && ui_out_is_mi_like_p (uiout
))
736 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
738 if (current_thread
!= -1 && is_exited (current_ptid
))
739 ui_out_message (uiout
, 0, "\n\
740 The current thread <Thread ID %d> has terminated. See `help thread'.\n",
746 /* Print information about currently known threads
748 * Note: this has the drawback that it _really_ switches
749 * threads, which frees the frame cache. A no-side
750 * effects info-threads command would be nicer.
754 info_threads_command (char *arg
, int from_tty
)
756 print_thread_info (uiout
, -1, -1);
759 /* Switch from one thread to another. */
762 switch_to_thread (ptid_t ptid
)
764 if (ptid_equal (ptid
, inferior_ptid
))
767 inferior_ptid
= ptid
;
768 reinit_frame_cache ();
769 registers_changed ();
771 /* We don't check for is_stopped, because we're called at times
772 while in the TARGET_RUNNING state, e.g., while handling an
774 if (!is_exited (ptid
) && !is_executing (ptid
))
775 stop_pc
= read_pc ();
777 stop_pc
= ~(CORE_ADDR
) 0;
781 restore_current_thread (ptid_t ptid
)
783 switch_to_thread (ptid
);
787 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
789 struct frame_info
*frame
= NULL
;
792 gdb_assert (frame_level
>= 0);
794 /* Restore by level first, check if the frame id is the same as
795 expected. If that fails, try restoring by frame id. If that
796 fails, nothing to do, just warn the user. */
799 frame
= find_relative_frame (get_current_frame (), &count
);
802 /* Either the frame ids match, of they're both invalid. The
803 latter case is not failsafe, but since it's highly unlikely
804 the search by level finds the wrong frame, it's 99.9(9)% of
805 the time (for all practical purposes) safe. */
806 && (frame_id_eq (get_frame_id (frame
), a_frame_id
)
807 /* Note: could be better to check every frame_id
808 member for equality here. */
809 || (!frame_id_p (get_frame_id (frame
))
810 && !frame_id_p (a_frame_id
))))
812 /* Cool, all is fine. */
813 select_frame (frame
);
817 frame
= frame_find_by_id (a_frame_id
);
820 /* Cool, refound it. */
821 select_frame (frame
);
825 /* Nothing else to do, the frame layout really changed. Select the
826 innermost stack frame. */
827 select_frame (get_current_frame ());
830 if (!ui_out_is_mi_like_p (uiout
))
833 Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
835 /* For MI, we should probably have a notification about
836 current frame change. But this error is not very
837 likely, so don't bother for now. */
838 print_stack_frame (get_selected_frame (NULL
), 1, SRC_LINE
);
842 struct current_thread_cleanup
844 ptid_t inferior_ptid
;
845 struct frame_id selected_frame_id
;
846 int selected_frame_level
;
851 do_restore_current_thread_cleanup (void *arg
)
853 struct thread_info
*tp
;
854 struct current_thread_cleanup
*old
= arg
;
855 restore_current_thread (old
->inferior_ptid
);
857 /* The running state of the originally selected thread may have
858 changed, so we have to recheck it here. */
860 && is_stopped (inferior_ptid
)
861 && target_has_registers
863 && target_has_memory
)
864 restore_selected_frame (old
->selected_frame_id
,
865 old
->selected_frame_level
);
869 restore_current_thread_cleanup_dtor (void *arg
)
871 struct current_thread_cleanup
*old
= arg
;
872 struct thread_info
*tp
;
873 tp
= find_thread_pid (old
->inferior_ptid
);
880 make_cleanup_restore_current_thread (void)
882 struct thread_info
*tp
;
883 struct frame_info
*frame
;
884 struct current_thread_cleanup
*old
;
886 old
= xmalloc (sizeof (struct current_thread_cleanup
));
887 old
->inferior_ptid
= inferior_ptid
;
888 old
->was_stopped
= is_stopped (inferior_ptid
);
890 && target_has_registers
892 && target_has_memory
)
893 frame
= get_selected_frame (NULL
);
897 old
->selected_frame_id
= get_frame_id (frame
);
898 old
->selected_frame_level
= frame_relative_level (frame
);
900 tp
= find_thread_pid (inferior_ptid
);
904 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
905 restore_current_thread_cleanup_dtor
);
908 /* Apply a GDB command to a list of threads. List syntax is a whitespace
909 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
910 of two numbers seperated by a hyphen. Examples:
912 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
913 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
914 thread apply all p x/i $pc Apply x/i $pc cmd to all threads
918 thread_apply_all_command (char *cmd
, int from_tty
)
920 struct thread_info
*tp
;
921 struct cleanup
*old_chain
;
924 if (cmd
== NULL
|| *cmd
== '\000')
925 error (_("Please specify a command following the thread ID list"));
928 target_find_new_threads ();
930 old_chain
= make_cleanup_restore_current_thread ();
932 /* Save a copy of the command in case it is clobbered by
934 saved_cmd
= xstrdup (cmd
);
935 make_cleanup (xfree
, saved_cmd
);
936 for (tp
= thread_list
; tp
; tp
= tp
->next
)
937 if (thread_alive (tp
))
939 switch_to_thread (tp
->ptid
);
941 printf_filtered (_("\nThread %d (%s):\n"),
942 tp
->num
, target_tid_to_str (inferior_ptid
));
943 execute_command (cmd
, from_tty
);
944 strcpy (cmd
, saved_cmd
); /* Restore exact command used previously */
947 do_cleanups (old_chain
);
951 thread_apply_command (char *tidlist
, int from_tty
)
955 struct cleanup
*old_chain
;
958 if (tidlist
== NULL
|| *tidlist
== '\000')
959 error (_("Please specify a thread ID list"));
961 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha (*cmd
); cmd
++);
964 error (_("Please specify a command following the thread ID list"));
966 /* Save a copy of the command in case it is clobbered by
968 saved_cmd
= xstrdup (cmd
);
969 old_chain
= make_cleanup (xfree
, saved_cmd
);
970 while (tidlist
< cmd
)
972 struct thread_info
*tp
;
975 start
= strtol (tidlist
, &p
, 10);
977 error (_("Error parsing %s"), tidlist
);
980 while (*tidlist
== ' ' || *tidlist
== '\t')
983 if (*tidlist
== '-') /* Got a range of IDs? */
985 tidlist
++; /* Skip the - */
986 end
= strtol (tidlist
, &p
, 10);
988 error (_("Error parsing %s"), tidlist
);
991 while (*tidlist
== ' ' || *tidlist
== '\t')
997 make_cleanup_restore_current_thread ();
999 for (; start
<= end
; start
++)
1001 tp
= find_thread_id (start
);
1004 warning (_("Unknown thread %d."), start
);
1005 else if (!thread_alive (tp
))
1006 warning (_("Thread %d has terminated."), start
);
1009 switch_to_thread (tp
->ptid
);
1011 printf_filtered (_("\nThread %d (%s):\n"), tp
->num
,
1012 target_tid_to_str (inferior_ptid
));
1013 execute_command (cmd
, from_tty
);
1015 /* Restore exact command used previously. */
1016 strcpy (cmd
, saved_cmd
);
1021 do_cleanups (old_chain
);
1024 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1025 if prefix of arg is `apply'. */
1028 thread_command (char *tidstr
, int from_tty
)
1032 if (target_has_stack
)
1034 if (is_exited (inferior_ptid
))
1035 printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
1036 pid_to_thread_id (inferior_ptid
),
1037 target_tid_to_str (inferior_ptid
));
1039 printf_filtered (_("[Current thread is %d (%s)]\n"),
1040 pid_to_thread_id (inferior_ptid
),
1041 target_tid_to_str (inferior_ptid
));
1044 error (_("No stack."));
1048 annotate_thread_changed ();
1049 gdb_thread_select (uiout
, tidstr
, NULL
);
1052 /* Print notices when new threads are attached and detached. */
1053 int print_thread_events
= 1;
1055 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1056 struct cmd_list_element
*c
, const char *value
)
1058 fprintf_filtered (file
, _("\
1059 Printing of thread events is %s.\n"),
1064 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr
)
1067 struct thread_info
*tp
;
1069 num
= value_as_long (parse_and_eval (tidstr
));
1071 tp
= find_thread_id (num
);
1074 error (_("Thread ID %d not known."), num
);
1076 if (!thread_alive (tp
))
1077 error (_("Thread ID %d has terminated."), num
);
1079 switch_to_thread (tp
->ptid
);
1081 ui_out_text (uiout
, "[Switching to thread ");
1082 ui_out_field_int (uiout
, "new-thread-id", pid_to_thread_id (inferior_ptid
));
1083 ui_out_text (uiout
, " (");
1084 ui_out_text (uiout
, target_tid_to_str (inferior_ptid
));
1085 ui_out_text (uiout
, ")]");
1087 /* Note that we can't reach this with an exited thread, due to the
1088 thread_alive check above. */
1089 if (tp
->state_
== THREAD_RUNNING
)
1090 ui_out_text (uiout
, "(running)\n");
1092 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1094 /* Since the current thread may have changed, see if there is any
1095 exited thread we can now delete. */
1102 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
1104 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
1105 error_message
, RETURN_MASK_ALL
) < 0)
1110 /* Commands with a prefix of `thread'. */
1111 struct cmd_list_element
*thread_cmd_list
= NULL
;
1114 _initialize_thread (void)
1116 static struct cmd_list_element
*thread_apply_list
= NULL
;
1117 struct cmd_list_element
*c
;
1119 c
= add_info ("threads", info_threads_command
,
1120 _("IDs of currently known threads."));
1121 set_cmd_no_selected_thread_ok (c
);
1123 c
= add_prefix_cmd ("thread", class_run
, thread_command
, _("\
1124 Use this command to switch between threads.\n\
1125 The new thread ID must be currently known."),
1126 &thread_cmd_list
, "thread ", 1, &cmdlist
);
1127 set_cmd_no_selected_thread_ok (c
);
1129 c
= add_prefix_cmd ("apply", class_run
, thread_apply_command
,
1130 _("Apply a command to a list of threads."),
1131 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
1132 set_cmd_no_selected_thread_ok (c
);
1134 c
= add_cmd ("all", class_run
, thread_apply_all_command
,
1135 _("Apply a command to all threads."), &thread_apply_list
);
1136 set_cmd_no_selected_thread_ok (c
);
1139 add_com_alias ("t", "thread", class_run
, 1);
1141 add_setshow_boolean_cmd ("thread-events", no_class
,
1142 &print_thread_events
, _("\
1143 Set printing of thread events (such as thread start and exit)."), _("\
1144 Show printing of thread events (such as thread start and exit)."), NULL
,
1146 show_print_thread_events
,
1147 &setprintlist
, &showprintlist
);