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),... */
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
)
250 observer_notify_thread_exit (tp
, silent
);
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 (tp
->state_
!= THREAD_EXITED
)
270 observer_notify_thread_exit (tp
, silent
);
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 /* Finds the first thread of the inferior given by PID. If PID is -1,
405 return the first thread in the list. */
408 first_thread_of_process (int pid
)
410 struct thread_info
*tp
, *ret
= NULL
;
412 for (tp
= thread_list
; tp
; tp
= tp
->next
)
413 if (pid
== -1 || ptid_get_pid (tp
->ptid
) == pid
)
414 if (ret
== NULL
|| tp
->num
< ret
->num
)
420 /* Print a list of thread ids currently known, and the total number of
421 threads. To be used from within catch_errors. */
423 do_captured_list_thread_ids (struct ui_out
*uiout
, void *arg
)
425 struct thread_info
*tp
;
427 struct cleanup
*cleanup_chain
;
428 int current_thread
= -1;
431 target_find_new_threads ();
433 cleanup_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "thread-ids");
435 for (tp
= thread_list
; tp
; tp
= tp
->next
)
437 if (tp
->state_
== THREAD_EXITED
)
440 if (ptid_equal (tp
->ptid
, inferior_ptid
))
441 current_thread
= tp
->num
;
444 ui_out_field_int (uiout
, "thread-id", tp
->num
);
447 do_cleanups (cleanup_chain
);
449 if (current_thread
!= -1)
450 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
451 ui_out_field_int (uiout
, "number-of-threads", num
);
455 /* Official gdblib interface function to get a list of thread ids and
458 gdb_list_thread_ids (struct ui_out
*uiout
, char **error_message
)
460 if (catch_exceptions_with_msg (uiout
, do_captured_list_thread_ids
, NULL
,
461 error_message
, RETURN_MASK_ALL
) < 0)
466 /* Return true if TP is an active thread. */
468 thread_alive (struct thread_info
*tp
)
470 if (tp
->state_
== THREAD_EXITED
)
472 if (!target_thread_alive (tp
->ptid
))
480 struct thread_info
*tp
, *next
;
482 for (tp
= thread_list
; tp
; tp
= next
)
485 if (!thread_alive (tp
))
486 delete_thread (tp
->ptid
);
491 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
493 struct inferior
*inf
;
494 struct thread_info
*tp
;
496 /* It can happen that what we knew as the target inferior id
497 changes. E.g, target remote may only discover the remote process
498 pid after adding the inferior to GDB's list. */
499 inf
= find_inferior_pid (ptid_get_pid (old_ptid
));
500 inf
->pid
= ptid_get_pid (new_ptid
);
502 tp
= find_thread_pid (old_ptid
);
505 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
509 set_running (ptid_t ptid
, int running
)
511 struct thread_info
*tp
;
513 /* We try not to notify the observer if no thread has actually changed
514 the running state -- merely to reduce the number of messages to
515 frontend. Frontend is supposed to handle multiple *running just fine. */
516 if (PIDGET (ptid
) == -1)
519 for (tp
= thread_list
; tp
; tp
= tp
->next
)
521 if (tp
->state_
== THREAD_EXITED
)
523 if (running
&& tp
->state_
== THREAD_STOPPED
)
525 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
528 observer_notify_target_resumed (ptid
);
533 tp
= find_thread_pid (ptid
);
535 gdb_assert (tp
->state_
!= THREAD_EXITED
);
536 if (running
&& tp
->state_
== THREAD_STOPPED
)
538 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
540 observer_notify_target_resumed (ptid
);
545 is_thread_state (ptid_t ptid
, enum thread_state state
)
547 struct thread_info
*tp
;
549 if (!target_has_execution
)
552 tp
= find_thread_pid (ptid
);
554 return tp
->state_
== state
;
558 is_stopped (ptid_t ptid
)
560 /* Without execution, this property is always true. */
561 if (!target_has_execution
)
564 return is_thread_state (ptid
, THREAD_STOPPED
);
568 is_exited (ptid_t ptid
)
570 /* Without execution, this property is always false. */
571 if (!target_has_execution
)
574 return is_thread_state (ptid
, THREAD_EXITED
);
578 is_running (ptid_t ptid
)
580 /* Without execution, this property is always false. */
581 if (!target_has_execution
)
584 return is_thread_state (ptid
, THREAD_RUNNING
);
590 struct thread_info
*tp
;
592 if (!target_has_execution
)
595 for (tp
= thread_list
; tp
; tp
= tp
->next
)
596 if (tp
->state_
== THREAD_RUNNING
)
603 is_executing (ptid_t ptid
)
605 struct thread_info
*tp
;
607 if (!target_has_execution
)
610 tp
= find_thread_pid (ptid
);
612 return tp
->executing_
;
616 set_executing (ptid_t ptid
, int executing
)
618 struct thread_info
*tp
;
620 if (PIDGET (ptid
) == -1)
622 for (tp
= thread_list
; tp
; tp
= tp
->next
)
623 tp
->executing_
= executing
;
627 tp
= find_thread_pid (ptid
);
629 tp
->executing_
= executing
;
634 set_stop_requested (ptid_t ptid
, int stop
)
636 struct thread_info
*tp
;
637 int all
= ptid_equal (ptid
, minus_one_ptid
);
639 if (all
|| ptid_is_pid (ptid
))
641 for (tp
= thread_list
; tp
; tp
= tp
->next
)
642 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
643 tp
->stop_requested
= stop
;
647 tp
= find_thread_pid (ptid
);
649 tp
->stop_requested
= stop
;
652 /* Call the stop requested observer so other components of GDB can
653 react to this request. */
655 observer_notify_thread_stop_requested (ptid
);
659 finish_thread_state (ptid_t ptid
)
661 struct thread_info
*tp
;
665 all
= ptid_equal (ptid
, minus_one_ptid
);
667 if (all
|| ptid_is_pid (ptid
))
669 for (tp
= thread_list
; tp
; tp
= tp
->next
)
671 if (tp
->state_
== THREAD_EXITED
)
673 if (all
|| ptid_get_pid (ptid
) == ptid_get_pid (tp
->ptid
))
675 if (tp
->executing_
&& tp
->state_
== THREAD_STOPPED
)
677 tp
->state_
= tp
->executing_
? THREAD_RUNNING
: THREAD_STOPPED
;
683 tp
= find_thread_pid (ptid
);
685 if (tp
->state_
!= THREAD_EXITED
)
687 if (tp
->executing_
&& tp
->state_
== THREAD_STOPPED
)
689 tp
->state_
= tp
->executing_
? THREAD_RUNNING
: THREAD_STOPPED
;
694 observer_notify_target_resumed (ptid
);
698 finish_thread_state_cleanup (void *arg
)
700 ptid_t
*ptid_p
= arg
;
704 finish_thread_state (*ptid_p
);
707 /* Prints the list of threads and their details on UIOUT.
708 This is a version of 'info_thread_command' suitable for
710 If REQUESTED_THREAD is not -1, it's the GDB id of the thread
711 that should be printed. Otherwise, all threads are
713 If PID is not -1, only print threads from the process PID.
714 Otherwise, threads from all attached PIDs are printed.
715 If both REQUESTED_THREAD and PID are not -1, then the thread
716 is printed if it belongs to the specified process. Otherwise,
717 an error is raised. */
719 print_thread_info (struct ui_out
*uiout
, int requested_thread
, int pid
)
721 struct thread_info
*tp
;
723 struct cleanup
*old_chain
;
725 int current_thread
= -1;
728 target_find_new_threads ();
729 current_ptid
= inferior_ptid
;
731 /* We'll be switching threads temporarily. */
732 old_chain
= make_cleanup_restore_current_thread ();
734 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
735 for (tp
= thread_list
; tp
; tp
= tp
->next
)
737 struct cleanup
*chain2
;
739 if (requested_thread
!= -1 && tp
->num
!= requested_thread
)
742 if (pid
!= -1 && PIDGET (tp
->ptid
) != pid
)
744 if (requested_thread
!= -1)
745 error (_("Requested thread not found in requested process"));
749 if (ptid_equal (tp
->ptid
, current_ptid
))
750 current_thread
= tp
->num
;
752 if (tp
->state_
== THREAD_EXITED
)
755 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
757 if (ptid_equal (tp
->ptid
, current_ptid
))
758 ui_out_text (uiout
, "* ");
760 ui_out_text (uiout
, " ");
762 ui_out_field_int (uiout
, "id", tp
->num
);
763 ui_out_text (uiout
, " ");
764 ui_out_field_string (uiout
, "target-id", target_pid_to_str (tp
->ptid
));
766 extra_info
= target_extra_thread_info (tp
);
769 ui_out_text (uiout
, " (");
770 ui_out_field_string (uiout
, "details", extra_info
);
771 ui_out_text (uiout
, ")");
773 ui_out_text (uiout
, " ");
775 if (tp
->state_
== THREAD_RUNNING
)
776 ui_out_text (uiout
, "(running)\n");
779 /* The switch below puts us at the top of the stack (leaf
781 switch_to_thread (tp
->ptid
);
782 print_stack_frame (get_selected_frame (NULL
),
783 /* For MI output, print frame level. */
784 ui_out_is_mi_like_p (uiout
),
788 if (ui_out_is_mi_like_p (uiout
))
790 char *state
= "stopped";
791 if (tp
->state_
== THREAD_RUNNING
)
793 ui_out_field_string (uiout
, "state", state
);
796 do_cleanups (chain2
);
799 /* Restores the current thread and the frame selected before
800 the "info threads" command. */
801 do_cleanups (old_chain
);
803 if (pid
== -1 && requested_thread
== -1)
805 gdb_assert (current_thread
!= -1
807 || ptid_equal (inferior_ptid
, null_ptid
));
808 if (current_thread
!= -1 && ui_out_is_mi_like_p (uiout
))
809 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
811 if (current_thread
!= -1 && is_exited (current_ptid
))
812 ui_out_message (uiout
, 0, "\n\
813 The current thread <Thread ID %d> has terminated. See `help thread'.\n",
816 && current_thread
== -1
817 && ptid_equal (current_ptid
, null_ptid
))
818 ui_out_message (uiout
, 0, "\n\
819 No selected thread. See `help thread'.\n");
824 /* Print information about currently known threads
826 * Note: this has the drawback that it _really_ switches
827 * threads, which frees the frame cache. A no-side
828 * effects info-threads command would be nicer.
832 info_threads_command (char *arg
, int from_tty
)
834 print_thread_info (uiout
, -1, -1);
837 /* Switch from one thread to another. */
840 switch_to_thread (ptid_t ptid
)
842 if (ptid_equal (ptid
, inferior_ptid
))
845 inferior_ptid
= ptid
;
846 reinit_frame_cache ();
847 registers_changed ();
849 /* We don't check for is_stopped, because we're called at times
850 while in the TARGET_RUNNING state, e.g., while handling an
852 if (!ptid_equal (inferior_ptid
, null_ptid
)
854 && !is_executing (ptid
))
855 stop_pc
= read_pc ();
857 stop_pc
= ~(CORE_ADDR
) 0;
861 restore_current_thread (ptid_t ptid
)
863 switch_to_thread (ptid
);
867 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
869 struct frame_info
*frame
= NULL
;
872 gdb_assert (frame_level
>= 0);
874 /* Restore by level first, check if the frame id is the same as
875 expected. If that fails, try restoring by frame id. If that
876 fails, nothing to do, just warn the user. */
879 frame
= find_relative_frame (get_current_frame (), &count
);
882 /* Either the frame ids match, of they're both invalid. The
883 latter case is not failsafe, but since it's highly unlikely
884 the search by level finds the wrong frame, it's 99.9(9)% of
885 the time (for all practical purposes) safe. */
886 && (frame_id_eq (get_frame_id (frame
), a_frame_id
)
887 /* Note: could be better to check every frame_id
888 member for equality here. */
889 || (!frame_id_p (get_frame_id (frame
))
890 && !frame_id_p (a_frame_id
))))
892 /* Cool, all is fine. */
893 select_frame (frame
);
897 frame
= frame_find_by_id (a_frame_id
);
900 /* Cool, refound it. */
901 select_frame (frame
);
905 /* Nothing else to do, the frame layout really changed. Select the
906 innermost stack frame. */
907 select_frame (get_current_frame ());
910 if (!ui_out_is_mi_like_p (uiout
))
913 Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
915 /* For MI, we should probably have a notification about
916 current frame change. But this error is not very
917 likely, so don't bother for now. */
918 print_stack_frame (get_selected_frame (NULL
), 1, SRC_LINE
);
922 struct current_thread_cleanup
924 ptid_t inferior_ptid
;
925 struct frame_id selected_frame_id
;
926 int selected_frame_level
;
931 do_restore_current_thread_cleanup (void *arg
)
933 struct thread_info
*tp
;
934 struct current_thread_cleanup
*old
= arg
;
936 tp
= find_thread_pid (old
->inferior_ptid
);
938 /* If the previously selected thread belonged to a process that has
939 in the mean time been deleted (due to normal exit, detach, etc.),
940 then don't revert back to it, but instead simply drop back to no
943 && find_inferior_pid (ptid_get_pid (tp
->ptid
)) != NULL
)
944 restore_current_thread (old
->inferior_ptid
);
946 restore_current_thread (null_ptid
);
948 /* The running state of the originally selected thread may have
949 changed, so we have to recheck it here. */
950 if (!ptid_equal (inferior_ptid
, null_ptid
)
952 && is_stopped (inferior_ptid
)
953 && target_has_registers
955 && target_has_memory
)
956 restore_selected_frame (old
->selected_frame_id
,
957 old
->selected_frame_level
);
961 restore_current_thread_cleanup_dtor (void *arg
)
963 struct current_thread_cleanup
*old
= arg
;
964 struct thread_info
*tp
;
965 tp
= find_thread_pid (old
->inferior_ptid
);
972 make_cleanup_restore_current_thread (void)
974 struct thread_info
*tp
;
975 struct frame_info
*frame
;
976 struct current_thread_cleanup
*old
;
978 old
= xmalloc (sizeof (struct current_thread_cleanup
));
979 old
->inferior_ptid
= inferior_ptid
;
981 if (!ptid_equal (inferior_ptid
, null_ptid
))
983 old
->was_stopped
= is_stopped (inferior_ptid
);
985 && target_has_registers
987 && target_has_memory
)
988 frame
= get_selected_frame (NULL
);
992 old
->selected_frame_id
= get_frame_id (frame
);
993 old
->selected_frame_level
= frame_relative_level (frame
);
995 tp
= find_thread_pid (inferior_ptid
);
1000 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
1001 restore_current_thread_cleanup_dtor
);
1004 /* Apply a GDB command to a list of threads. List syntax is a whitespace
1005 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
1006 of two numbers seperated by a hyphen. Examples:
1008 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
1009 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
1010 thread apply all p x/i $pc Apply x/i $pc cmd to all threads
1014 thread_apply_all_command (char *cmd
, int from_tty
)
1016 struct thread_info
*tp
;
1017 struct cleanup
*old_chain
;
1020 if (cmd
== NULL
|| *cmd
== '\000')
1021 error (_("Please specify a command following the thread ID list"));
1024 target_find_new_threads ();
1026 old_chain
= make_cleanup_restore_current_thread ();
1028 /* Save a copy of the command in case it is clobbered by
1030 saved_cmd
= xstrdup (cmd
);
1031 make_cleanup (xfree
, saved_cmd
);
1032 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1033 if (thread_alive (tp
))
1035 switch_to_thread (tp
->ptid
);
1037 printf_filtered (_("\nThread %d (%s):\n"),
1038 tp
->num
, target_pid_to_str (inferior_ptid
));
1039 execute_command (cmd
, from_tty
);
1040 strcpy (cmd
, saved_cmd
); /* Restore exact command used previously */
1043 do_cleanups (old_chain
);
1047 thread_apply_command (char *tidlist
, int from_tty
)
1051 struct cleanup
*old_chain
;
1054 if (tidlist
== NULL
|| *tidlist
== '\000')
1055 error (_("Please specify a thread ID list"));
1057 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha (*cmd
); cmd
++);
1060 error (_("Please specify a command following the thread ID list"));
1062 /* Save a copy of the command in case it is clobbered by
1064 saved_cmd
= xstrdup (cmd
);
1065 old_chain
= make_cleanup (xfree
, saved_cmd
);
1066 while (tidlist
< cmd
)
1068 struct thread_info
*tp
;
1071 start
= strtol (tidlist
, &p
, 10);
1073 error (_("Error parsing %s"), tidlist
);
1076 while (*tidlist
== ' ' || *tidlist
== '\t')
1079 if (*tidlist
== '-') /* Got a range of IDs? */
1081 tidlist
++; /* Skip the - */
1082 end
= strtol (tidlist
, &p
, 10);
1084 error (_("Error parsing %s"), tidlist
);
1087 while (*tidlist
== ' ' || *tidlist
== '\t')
1093 make_cleanup_restore_current_thread ();
1095 for (; start
<= end
; start
++)
1097 tp
= find_thread_id (start
);
1100 warning (_("Unknown thread %d."), start
);
1101 else if (!thread_alive (tp
))
1102 warning (_("Thread %d has terminated."), start
);
1105 switch_to_thread (tp
->ptid
);
1107 printf_filtered (_("\nThread %d (%s):\n"), tp
->num
,
1108 target_pid_to_str (inferior_ptid
));
1109 execute_command (cmd
, from_tty
);
1111 /* Restore exact command used previously. */
1112 strcpy (cmd
, saved_cmd
);
1117 do_cleanups (old_chain
);
1120 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1121 if prefix of arg is `apply'. */
1124 thread_command (char *tidstr
, int from_tty
)
1128 if (ptid_equal (inferior_ptid
, null_ptid
))
1129 error (_("No thread selected"));
1131 if (target_has_stack
)
1133 if (is_exited (inferior_ptid
))
1134 printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
1135 pid_to_thread_id (inferior_ptid
),
1136 target_pid_to_str (inferior_ptid
));
1138 printf_filtered (_("[Current thread is %d (%s)]\n"),
1139 pid_to_thread_id (inferior_ptid
),
1140 target_pid_to_str (inferior_ptid
));
1143 error (_("No stack."));
1147 gdb_thread_select (uiout
, tidstr
, NULL
);
1150 /* Print notices when new threads are attached and detached. */
1151 int print_thread_events
= 1;
1153 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1154 struct cmd_list_element
*c
, const char *value
)
1156 fprintf_filtered (file
, _("\
1157 Printing of thread events is %s.\n"),
1162 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr
)
1165 struct thread_info
*tp
;
1167 num
= value_as_long (parse_and_eval (tidstr
));
1169 tp
= find_thread_id (num
);
1172 error (_("Thread ID %d not known."), num
);
1174 if (!thread_alive (tp
))
1175 error (_("Thread ID %d has terminated."), num
);
1177 switch_to_thread (tp
->ptid
);
1179 annotate_thread_changed ();
1181 ui_out_text (uiout
, "[Switching to thread ");
1182 ui_out_field_int (uiout
, "new-thread-id", pid_to_thread_id (inferior_ptid
));
1183 ui_out_text (uiout
, " (");
1184 ui_out_text (uiout
, target_pid_to_str (inferior_ptid
));
1185 ui_out_text (uiout
, ")]");
1187 /* Note that we can't reach this with an exited thread, due to the
1188 thread_alive check above. */
1189 if (tp
->state_
== THREAD_RUNNING
)
1190 ui_out_text (uiout
, "(running)\n");
1192 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1194 /* Since the current thread may have changed, see if there is any
1195 exited thread we can now delete. */
1202 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
1204 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
1205 error_message
, RETURN_MASK_ALL
) < 0)
1210 /* Commands with a prefix of `thread'. */
1211 struct cmd_list_element
*thread_cmd_list
= NULL
;
1214 _initialize_thread (void)
1216 static struct cmd_list_element
*thread_apply_list
= NULL
;
1218 add_info ("threads", info_threads_command
,
1219 _("IDs of currently known threads."));
1221 add_prefix_cmd ("thread", class_run
, thread_command
, _("\
1222 Use this command to switch between threads.\n\
1223 The new thread ID must be currently known."),
1224 &thread_cmd_list
, "thread ", 1, &cmdlist
);
1226 add_prefix_cmd ("apply", class_run
, thread_apply_command
,
1227 _("Apply a command to a list of threads."),
1228 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
1230 add_cmd ("all", class_run
, thread_apply_all_command
,
1231 _("Apply a command to all threads."), &thread_apply_list
);
1234 add_com_alias ("t", "thread", class_run
, 1);
1236 add_setshow_boolean_cmd ("thread-events", no_class
,
1237 &print_thread_events
, _("\
1238 Set printing of thread events (such as thread start and exit)."), _("\
1239 Show printing of thread events (such as thread start and exit)."), NULL
,
1241 show_print_thread_events
,
1242 &setprintlist
, &showprintlist
);