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
)
453 struct thread_info
*tp
;
455 /* If we can't find the thread, then we're debugging a single threaded
456 process. No need to do anything in that case. */
457 tp
= find_thread_id (pid_to_thread_id (ptid
));
461 /* In all-stop mode, these are global state, while in non-stop mode,
462 they are per thread. */
465 *continuations
= tp
->continuations
;
466 tp
->continuations
= NULL
;
467 *intermediate_continuations
= tp
->intermediate_continuations
;
468 tp
->intermediate_continuations
= NULL
;
469 *proceed_to_finish
= tp
->proceed_to_finish
;
470 *stop_step
= tp
->stop_step
;
471 *step_multi
= tp
->step_multi
;
472 *stop_signal
= tp
->stop_signal
;
476 /* Save infrun state for the thread PID. */
479 save_infrun_state (ptid_t ptid
,
480 struct continuation
*continuations
,
481 struct continuation
*intermediate_continuations
,
482 int proceed_to_finish
,
485 enum target_signal stop_signal
)
487 struct thread_info
*tp
;
489 /* If we can't find the thread, then we're debugging a single-threaded
490 process. Nothing to do in that case. */
491 tp
= find_thread_id (pid_to_thread_id (ptid
));
495 /* In all-stop mode, these are global state, while in non-stop mode,
496 they are per thread. */
499 tp
->continuations
= continuations
;
500 tp
->intermediate_continuations
= intermediate_continuations
;
501 tp
->proceed_to_finish
= proceed_to_finish
;
502 tp
->stop_step
= stop_step
;
503 tp
->step_multi
= step_multi
;
504 tp
->stop_signal
= stop_signal
;
508 /* Return true if TP is an active thread. */
510 thread_alive (struct thread_info
*tp
)
512 if (tp
->state_
== THREAD_EXITED
)
514 if (!target_thread_alive (tp
->ptid
))
522 struct thread_info
*tp
, *next
;
524 for (tp
= thread_list
; tp
; tp
= next
)
527 if (!thread_alive (tp
))
528 delete_thread (tp
->ptid
);
533 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
535 struct thread_info
* tp
= find_thread_pid (old_ptid
);
538 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
542 set_running (ptid_t ptid
, int running
)
544 struct thread_info
*tp
;
548 /* This is one of the targets that does not add main
549 thread to the thread list. Just use a single
550 global flag to indicate that a thread is running.
552 This problem is unique to ST programs. For MT programs,
553 the main thread is always present in the thread list. If it's
554 not, the first call to context_switch will mess up GDB internal
557 && main_thread_state
!= THREAD_RUNNING
558 && !suppress_resume_observer
)
559 observer_notify_target_resumed (ptid
);
560 main_thread_state
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
564 /* We try not to notify the observer if no thread has actually changed
565 the running state -- merely to reduce the number of messages to
566 frontend. Frontend is supposed to handle multiple *running just fine. */
567 if (PIDGET (ptid
) == -1)
570 for (tp
= thread_list
; tp
; tp
= tp
->next
)
572 if (tp
->state_
== THREAD_EXITED
)
574 if (running
&& tp
->state_
== THREAD_STOPPED
)
576 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
578 if (any_started
&& !suppress_resume_observer
)
579 observer_notify_target_resumed (ptid
);
584 tp
= find_thread_pid (ptid
);
586 gdb_assert (tp
->state_
!= THREAD_EXITED
);
587 if (running
&& tp
->state_
== THREAD_STOPPED
)
589 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
590 if (started
&& !suppress_resume_observer
)
591 observer_notify_target_resumed (ptid
);
596 is_thread_state (ptid_t ptid
, enum thread_state state
)
598 struct thread_info
*tp
;
600 if (!target_has_execution
)
604 return main_thread_state
== state
;
606 tp
= find_thread_pid (ptid
);
608 return tp
->state_
== state
;
612 is_stopped (ptid_t ptid
)
614 /* Without execution, this property is always true. */
615 if (!target_has_execution
)
618 return is_thread_state (ptid
, THREAD_STOPPED
);
622 is_exited (ptid_t ptid
)
624 /* Without execution, this property is always false. */
625 if (!target_has_execution
)
628 return is_thread_state (ptid
, THREAD_EXITED
);
632 is_running (ptid_t ptid
)
634 /* Without execution, this property is always false. */
635 if (!target_has_execution
)
638 return is_thread_state (ptid
, THREAD_RUNNING
);
644 struct thread_info
*tp
;
646 if (!target_has_execution
)
650 return main_thread_state
== THREAD_RUNNING
;
652 for (tp
= thread_list
; tp
; tp
= tp
->next
)
653 if (tp
->state_
== THREAD_RUNNING
)
660 is_executing (ptid_t ptid
)
662 struct thread_info
*tp
;
664 if (!target_has_execution
)
668 return main_thread_executing
;
670 tp
= find_thread_pid (ptid
);
672 return tp
->executing_
;
676 set_executing (ptid_t ptid
, int executing
)
678 struct thread_info
*tp
;
682 /* This target does not add the main thread to the thread list.
683 Use a global flag to indicate that the thread is
685 main_thread_executing
= executing
;
689 if (PIDGET (ptid
) == -1)
691 for (tp
= thread_list
; tp
; tp
= tp
->next
)
692 tp
->executing_
= executing
;
696 tp
= find_thread_pid (ptid
);
698 tp
->executing_
= executing
;
702 /* Prints the list of threads and their details on UIOUT.
703 This is a version of 'info_thread_command' suitable for
705 If REQUESTED_THREAD is not -1, it's the GDB id of the thread
706 that should be printed. Otherwise, all threads are
709 print_thread_info (struct ui_out
*uiout
, int requested_thread
)
711 struct thread_info
*tp
;
713 struct cleanup
*old_chain
;
715 int current_thread
= -1;
718 target_find_new_threads ();
719 current_ptid
= inferior_ptid
;
721 /* We'll be switching threads temporarily. */
722 old_chain
= make_cleanup_restore_current_thread ();
724 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
725 for (tp
= thread_list
; tp
; tp
= tp
->next
)
727 struct cleanup
*chain2
;
729 if (requested_thread
!= -1 && tp
->num
!= requested_thread
)
732 if (ptid_equal (tp
->ptid
, current_ptid
))
733 current_thread
= tp
->num
;
735 if (tp
->state_
== THREAD_EXITED
)
738 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
740 if (ptid_equal (tp
->ptid
, current_ptid
))
741 ui_out_text (uiout
, "* ");
743 ui_out_text (uiout
, " ");
745 ui_out_field_int (uiout
, "id", tp
->num
);
746 ui_out_text (uiout
, " ");
747 ui_out_field_string (uiout
, "target-id", target_tid_to_str (tp
->ptid
));
749 if (tp
->state_
!= THREAD_EXITED
)
751 extra_info
= target_extra_thread_info (tp
);
754 ui_out_text (uiout
, " (");
755 ui_out_field_string (uiout
, "details", extra_info
);
756 ui_out_text (uiout
, ")");
758 ui_out_text (uiout
, " ");
761 if (tp
->state_
== THREAD_RUNNING
)
762 ui_out_text (uiout
, "(running)\n");
765 /* The switch below puts us at the top of the stack (leaf
767 switch_to_thread (tp
->ptid
);
768 print_stack_frame (get_selected_frame (NULL
),
769 /* For MI output, print frame level. */
770 ui_out_is_mi_like_p (uiout
),
774 if (ui_out_is_mi_like_p (uiout
))
776 char *state
= "stopped";
777 if (tp
->state_
== THREAD_EXITED
)
779 else if (tp
->state_
== THREAD_RUNNING
)
781 ui_out_field_string (uiout
, "state", state
);
784 do_cleanups (chain2
);
787 /* Restores the current thread and the frame selected before
788 the "info threads" command. */
789 do_cleanups (old_chain
);
791 if (requested_thread
== -1)
793 gdb_assert (current_thread
!= -1
795 if (current_thread
!= -1 && ui_out_is_mi_like_p (uiout
))
796 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
798 if (current_thread
!= -1 && is_exited (current_ptid
))
799 ui_out_message (uiout
, 0, "\n\
800 The current thread <Thread ID %d> has terminated. See `help thread'.\n",
806 /* Print information about currently known threads
808 * Note: this has the drawback that it _really_ switches
809 * threads, which frees the frame cache. A no-side
810 * effects info-threads command would be nicer.
814 info_threads_command (char *arg
, int from_tty
)
816 print_thread_info (uiout
, -1);
819 /* Switch from one thread to another. */
822 switch_to_thread (ptid_t ptid
)
824 if (ptid_equal (ptid
, inferior_ptid
))
827 inferior_ptid
= ptid
;
828 reinit_frame_cache ();
829 registers_changed ();
831 /* We don't check for is_stopped, because we're called at times
832 while in the TARGET_RUNNING state, e.g., while handling an
834 if (!is_exited (ptid
) && !is_executing (ptid
))
835 stop_pc
= read_pc ();
837 stop_pc
= ~(CORE_ADDR
) 0;
841 restore_current_thread (ptid_t ptid
)
843 if (!ptid_equal (ptid
, inferior_ptid
))
846 context_switch_to (ptid
);
848 switch_to_thread (ptid
);
853 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
855 struct frame_info
*frame
= NULL
;
858 gdb_assert (frame_level
>= 0);
860 /* Restore by level first, check if the frame id is the same as
861 expected. If that fails, try restoring by frame id. If that
862 fails, nothing to do, just warn the user. */
865 frame
= find_relative_frame (get_current_frame (), &count
);
868 /* Either the frame ids match, of they're both invalid. The
869 latter case is not failsafe, but since it's highly unlikely
870 the search by level finds the wrong frame, it's 99.9(9)% of
871 the time (for all practical purposes) safe. */
872 && (frame_id_eq (get_frame_id (frame
), a_frame_id
)
873 /* Note: could be better to check every frame_id
874 member for equality here. */
875 || (!frame_id_p (get_frame_id (frame
))
876 && !frame_id_p (a_frame_id
))))
878 /* Cool, all is fine. */
879 select_frame (frame
);
883 frame
= frame_find_by_id (a_frame_id
);
886 /* Cool, refound it. */
887 select_frame (frame
);
891 /* Nothing else to do, the frame layout really changed. Select the
892 innermost stack frame. */
893 select_frame (get_current_frame ());
896 if (!ui_out_is_mi_like_p (uiout
))
899 Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
901 /* For MI, we should probably have a notification about
902 current frame change. But this error is not very
903 likely, so don't bother for now. */
904 print_stack_frame (get_selected_frame (NULL
), 1, SRC_LINE
);
908 struct current_thread_cleanup
910 ptid_t inferior_ptid
;
911 struct frame_id selected_frame_id
;
912 int selected_frame_level
;
917 do_restore_current_thread_cleanup (void *arg
)
919 struct thread_info
*tp
;
920 struct current_thread_cleanup
*old
= arg
;
921 restore_current_thread (old
->inferior_ptid
);
923 /* The running state of the originally selected thread may have
924 changed, so we have to recheck it here. */
926 && is_stopped (inferior_ptid
)
927 && target_has_registers
929 && target_has_memory
)
930 restore_selected_frame (old
->selected_frame_id
,
931 old
->selected_frame_level
);
935 restore_current_thread_cleanup_dtor (void *arg
)
937 struct current_thread_cleanup
*old
= arg
;
938 struct thread_info
*tp
;
939 tp
= find_thread_pid (old
->inferior_ptid
);
946 make_cleanup_restore_current_thread (void)
948 struct thread_info
*tp
;
949 struct frame_info
*frame
;
950 struct current_thread_cleanup
*old
;
952 old
= xmalloc (sizeof (struct current_thread_cleanup
));
953 old
->inferior_ptid
= inferior_ptid
;
954 old
->was_stopped
= is_stopped (inferior_ptid
);
956 && target_has_registers
958 && target_has_memory
)
959 frame
= get_selected_frame (NULL
);
963 old
->selected_frame_id
= get_frame_id (frame
);
964 old
->selected_frame_level
= frame_relative_level (frame
);
966 tp
= find_thread_pid (inferior_ptid
);
970 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
971 restore_current_thread_cleanup_dtor
);
974 /* Apply a GDB command to a list of threads. List syntax is a whitespace
975 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
976 of two numbers seperated by a hyphen. Examples:
978 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
979 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
980 thread apply all p x/i $pc Apply x/i $pc cmd to all threads
984 thread_apply_all_command (char *cmd
, int from_tty
)
986 struct thread_info
*tp
;
987 struct cleanup
*old_chain
;
990 if (cmd
== NULL
|| *cmd
== '\000')
991 error (_("Please specify a command following the thread ID list"));
994 target_find_new_threads ();
996 old_chain
= make_cleanup_restore_current_thread ();
998 /* Save a copy of the command in case it is clobbered by
1000 saved_cmd
= xstrdup (cmd
);
1001 make_cleanup (xfree
, saved_cmd
);
1002 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1003 if (thread_alive (tp
))
1006 context_switch_to (tp
->ptid
);
1008 switch_to_thread (tp
->ptid
);
1010 printf_filtered (_("\nThread %d (%s):\n"),
1011 tp
->num
, target_tid_to_str (inferior_ptid
));
1012 execute_command (cmd
, from_tty
);
1013 strcpy (cmd
, saved_cmd
); /* Restore exact command used previously */
1016 do_cleanups (old_chain
);
1020 thread_apply_command (char *tidlist
, int from_tty
)
1024 struct cleanup
*old_chain
;
1027 if (tidlist
== NULL
|| *tidlist
== '\000')
1028 error (_("Please specify a thread ID list"));
1030 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha (*cmd
); cmd
++);
1033 error (_("Please specify a command following the thread ID list"));
1035 /* Save a copy of the command in case it is clobbered by
1037 saved_cmd
= xstrdup (cmd
);
1038 old_chain
= make_cleanup (xfree
, saved_cmd
);
1039 while (tidlist
< cmd
)
1041 struct thread_info
*tp
;
1044 start
= strtol (tidlist
, &p
, 10);
1046 error (_("Error parsing %s"), tidlist
);
1049 while (*tidlist
== ' ' || *tidlist
== '\t')
1052 if (*tidlist
== '-') /* Got a range of IDs? */
1054 tidlist
++; /* Skip the - */
1055 end
= strtol (tidlist
, &p
, 10);
1057 error (_("Error parsing %s"), tidlist
);
1060 while (*tidlist
== ' ' || *tidlist
== '\t')
1066 make_cleanup_restore_current_thread ();
1068 for (; start
<= end
; start
++)
1070 tp
= find_thread_id (start
);
1073 warning (_("Unknown thread %d."), start
);
1074 else if (!thread_alive (tp
))
1075 warning (_("Thread %d has terminated."), start
);
1079 context_switch_to (tp
->ptid
);
1081 switch_to_thread (tp
->ptid
);
1083 printf_filtered (_("\nThread %d (%s):\n"), tp
->num
,
1084 target_tid_to_str (inferior_ptid
));
1085 execute_command (cmd
, from_tty
);
1087 /* Restore exact command used previously. */
1088 strcpy (cmd
, saved_cmd
);
1093 do_cleanups (old_chain
);
1096 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1097 if prefix of arg is `apply'. */
1100 thread_command (char *tidstr
, int from_tty
)
1104 if (target_has_stack
)
1106 if (is_exited (inferior_ptid
))
1107 printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
1108 pid_to_thread_id (inferior_ptid
),
1109 target_tid_to_str (inferior_ptid
));
1111 printf_filtered (_("[Current thread is %d (%s)]\n"),
1112 pid_to_thread_id (inferior_ptid
),
1113 target_tid_to_str (inferior_ptid
));
1116 error (_("No stack."));
1120 annotate_thread_changed ();
1121 gdb_thread_select (uiout
, tidstr
, NULL
);
1124 /* Print notices when new threads are attached and detached. */
1125 int print_thread_events
= 1;
1127 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1128 struct cmd_list_element
*c
, const char *value
)
1130 fprintf_filtered (file
, _("\
1131 Printing of thread events is %s.\n"),
1136 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr
)
1139 struct thread_info
*tp
;
1141 num
= value_as_long (parse_and_eval (tidstr
));
1143 tp
= find_thread_id (num
);
1146 error (_("Thread ID %d not known."), num
);
1148 if (!thread_alive (tp
))
1149 error (_("Thread ID %d has terminated."), num
);
1152 context_switch_to (tp
->ptid
);
1154 switch_to_thread (tp
->ptid
);
1156 ui_out_text (uiout
, "[Switching to thread ");
1157 ui_out_field_int (uiout
, "new-thread-id", pid_to_thread_id (inferior_ptid
));
1158 ui_out_text (uiout
, " (");
1159 ui_out_text (uiout
, target_tid_to_str (inferior_ptid
));
1160 ui_out_text (uiout
, ")]");
1162 /* Note that we can't reach this with an exited thread, due to the
1163 thread_alive check above. */
1164 if (tp
->state_
== THREAD_RUNNING
)
1165 ui_out_text (uiout
, "(running)\n");
1167 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1169 /* Since the current thread may have changed, see if there is any
1170 exited thread we can now delete. */
1177 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
1179 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
1180 error_message
, RETURN_MASK_ALL
) < 0)
1185 /* Commands with a prefix of `thread'. */
1186 struct cmd_list_element
*thread_cmd_list
= NULL
;
1189 _initialize_thread (void)
1191 static struct cmd_list_element
*thread_apply_list
= NULL
;
1192 struct cmd_list_element
*c
;
1194 c
= add_info ("threads", info_threads_command
,
1195 _("IDs of currently known threads."));
1196 set_cmd_no_selected_thread_ok (c
);
1198 c
= add_prefix_cmd ("thread", class_run
, thread_command
, _("\
1199 Use this command to switch between threads.\n\
1200 The new thread ID must be currently known."),
1201 &thread_cmd_list
, "thread ", 1, &cmdlist
);
1202 set_cmd_no_selected_thread_ok (c
);
1204 c
= add_prefix_cmd ("apply", class_run
, thread_apply_command
,
1205 _("Apply a command to a list of threads."),
1206 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
1207 set_cmd_no_selected_thread_ok (c
);
1209 c
= add_cmd ("all", class_run
, thread_apply_all_command
,
1210 _("Apply a command to all threads."), &thread_apply_list
);
1211 set_cmd_no_selected_thread_ok (c
);
1214 add_com_alias ("t", "thread", class_run
, 1);
1216 add_setshow_boolean_cmd ("thread-events", no_class
,
1217 &print_thread_events
, _("\
1218 Set printing of thread events (such as thread start and exit)."), _("\
1219 Show printing of thread events (such as thread start and exit)."), NULL
,
1221 show_print_thread_events
,
1222 &setprintlist
, &showprintlist
);