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 /* 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
;
412 int current_thread
= -1;
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 if (ptid_equal (tp
->ptid
, inferior_ptid
))
425 current_thread
= tp
->num
;
428 ui_out_field_int (uiout
, "thread-id", tp
->num
);
431 do_cleanups (cleanup_chain
);
433 if (current_thread
!= -1)
434 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
435 ui_out_field_int (uiout
, "number-of-threads", num
);
439 /* Official gdblib interface function to get a list of thread ids and
442 gdb_list_thread_ids (struct ui_out
*uiout
, char **error_message
)
444 if (catch_exceptions_with_msg (uiout
, do_captured_list_thread_ids
, NULL
,
445 error_message
, RETURN_MASK_ALL
) < 0)
450 /* Return true if TP is an active thread. */
452 thread_alive (struct thread_info
*tp
)
454 if (tp
->state_
== THREAD_EXITED
)
456 if (!target_thread_alive (tp
->ptid
))
464 struct thread_info
*tp
, *next
;
466 for (tp
= thread_list
; tp
; tp
= next
)
469 if (!thread_alive (tp
))
470 delete_thread (tp
->ptid
);
475 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
477 struct inferior
*inf
;
478 struct thread_info
*tp
;
480 /* It can happen that what we knew as the target inferior id
481 changes. E.g, target remote may only discover the remote process
482 pid after adding the inferior to GDB's list. */
483 inf
= find_inferior_pid (ptid_get_pid (old_ptid
));
484 inf
->pid
= ptid_get_pid (new_ptid
);
486 tp
= find_thread_pid (old_ptid
);
489 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
493 set_running (ptid_t ptid
, int running
)
495 struct thread_info
*tp
;
497 /* We try not to notify the observer if no thread has actually changed
498 the running state -- merely to reduce the number of messages to
499 frontend. Frontend is supposed to handle multiple *running just fine. */
500 if (PIDGET (ptid
) == -1)
503 for (tp
= thread_list
; tp
; tp
= tp
->next
)
505 if (tp
->state_
== THREAD_EXITED
)
507 if (running
&& tp
->state_
== THREAD_STOPPED
)
509 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
512 observer_notify_target_resumed (ptid
);
517 tp
= find_thread_pid (ptid
);
519 gdb_assert (tp
->state_
!= THREAD_EXITED
);
520 if (running
&& tp
->state_
== THREAD_STOPPED
)
522 tp
->state_
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
524 observer_notify_target_resumed (ptid
);
529 is_thread_state (ptid_t ptid
, enum thread_state state
)
531 struct thread_info
*tp
;
533 if (!target_has_execution
)
536 tp
= find_thread_pid (ptid
);
538 return tp
->state_
== state
;
542 is_stopped (ptid_t ptid
)
544 /* Without execution, this property is always true. */
545 if (!target_has_execution
)
548 return is_thread_state (ptid
, THREAD_STOPPED
);
552 is_exited (ptid_t ptid
)
554 /* Without execution, this property is always false. */
555 if (!target_has_execution
)
558 return is_thread_state (ptid
, THREAD_EXITED
);
562 is_running (ptid_t ptid
)
564 /* Without execution, this property is always false. */
565 if (!target_has_execution
)
568 return is_thread_state (ptid
, THREAD_RUNNING
);
574 struct thread_info
*tp
;
576 if (!target_has_execution
)
579 for (tp
= thread_list
; tp
; tp
= tp
->next
)
580 if (tp
->state_
== THREAD_RUNNING
)
587 is_executing (ptid_t ptid
)
589 struct thread_info
*tp
;
591 if (!target_has_execution
)
594 tp
= find_thread_pid (ptid
);
596 return tp
->executing_
;
600 set_executing (ptid_t ptid
, int executing
)
602 struct thread_info
*tp
;
604 if (PIDGET (ptid
) == -1)
606 for (tp
= thread_list
; tp
; tp
= tp
->next
)
607 tp
->executing_
= executing
;
611 tp
= find_thread_pid (ptid
);
613 tp
->executing_
= executing
;
618 set_stop_requested (ptid_t ptid
, int stop
)
620 struct thread_info
*tp
;
621 int all
= ptid_equal (ptid
, minus_one_ptid
);
623 if (all
|| ptid_is_pid (ptid
))
625 for (tp
= thread_list
; tp
; tp
= tp
->next
)
626 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
627 tp
->stop_requested
= stop
;
631 tp
= find_thread_pid (ptid
);
633 tp
->stop_requested
= stop
;
636 /* Call the stop requested observer so other components of GDB can
637 react to this request. */
639 observer_notify_thread_stop_requested (ptid
);
643 finish_thread_state (ptid_t ptid
)
645 struct thread_info
*tp
;
649 all
= ptid_equal (ptid
, minus_one_ptid
);
651 if (all
|| ptid_is_pid (ptid
))
653 for (tp
= thread_list
; tp
; tp
= tp
->next
)
655 if (tp
->state_
== THREAD_EXITED
)
657 if (all
|| ptid_get_pid (ptid
) == ptid_get_pid (tp
->ptid
))
659 if (tp
->executing_
&& tp
->state_
== THREAD_STOPPED
)
661 tp
->state_
= tp
->executing_
? THREAD_RUNNING
: THREAD_STOPPED
;
667 tp
= find_thread_pid (ptid
);
669 if (tp
->state_
!= THREAD_EXITED
)
671 if (tp
->executing_
&& tp
->state_
== THREAD_STOPPED
)
673 tp
->state_
= tp
->executing_
? THREAD_RUNNING
: THREAD_STOPPED
;
678 observer_notify_target_resumed (ptid
);
682 finish_thread_state_cleanup (void *arg
)
684 ptid_t
*ptid_p
= arg
;
688 finish_thread_state (*ptid_p
);
691 /* Prints the list of threads and their details on UIOUT.
692 This is a version of 'info_thread_command' suitable for
694 If REQUESTED_THREAD is not -1, it's the GDB id of the thread
695 that should be printed. Otherwise, all threads are
697 If PID is not -1, only print threads from the process PID.
698 Otherwise, threads from all attached PIDs are printed.
699 If both REQUESTED_THREAD and PID are not -1, then the thread
700 is printed if it belongs to the specified process. Otherwise,
701 an error is raised. */
703 print_thread_info (struct ui_out
*uiout
, int requested_thread
, int pid
)
705 struct thread_info
*tp
;
707 struct cleanup
*old_chain
;
709 int current_thread
= -1;
712 target_find_new_threads ();
713 current_ptid
= inferior_ptid
;
715 /* We'll be switching threads temporarily. */
716 old_chain
= make_cleanup_restore_current_thread ();
718 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
719 for (tp
= thread_list
; tp
; tp
= tp
->next
)
721 struct cleanup
*chain2
;
723 if (requested_thread
!= -1 && tp
->num
!= requested_thread
)
726 if (pid
!= -1 && PIDGET (tp
->ptid
) != pid
)
728 if (requested_thread
!= -1)
729 error (_("Requested thread not found in requested process"));
733 if (ptid_equal (tp
->ptid
, current_ptid
))
734 current_thread
= tp
->num
;
736 if (tp
->state_
== THREAD_EXITED
)
739 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
741 if (ptid_equal (tp
->ptid
, current_ptid
))
742 ui_out_text (uiout
, "* ");
744 ui_out_text (uiout
, " ");
746 ui_out_field_int (uiout
, "id", tp
->num
);
747 ui_out_text (uiout
, " ");
748 ui_out_field_string (uiout
, "target-id", target_pid_to_str (tp
->ptid
));
750 extra_info
= target_extra_thread_info (tp
);
753 ui_out_text (uiout
, " (");
754 ui_out_field_string (uiout
, "details", extra_info
);
755 ui_out_text (uiout
, ")");
757 ui_out_text (uiout
, " ");
759 if (tp
->state_
== THREAD_RUNNING
)
760 ui_out_text (uiout
, "(running)\n");
763 /* The switch below puts us at the top of the stack (leaf
765 switch_to_thread (tp
->ptid
);
766 print_stack_frame (get_selected_frame (NULL
),
767 /* For MI output, print frame level. */
768 ui_out_is_mi_like_p (uiout
),
772 if (ui_out_is_mi_like_p (uiout
))
774 char *state
= "stopped";
775 if (tp
->state_
== THREAD_RUNNING
)
777 ui_out_field_string (uiout
, "state", state
);
780 do_cleanups (chain2
);
783 /* Restores the current thread and the frame selected before
784 the "info threads" command. */
785 do_cleanups (old_chain
);
787 if (pid
== -1 && requested_thread
== -1)
789 gdb_assert (current_thread
!= -1
791 || ptid_equal (inferior_ptid
, null_ptid
));
792 if (current_thread
!= -1 && ui_out_is_mi_like_p (uiout
))
793 ui_out_field_int (uiout
, "current-thread-id", current_thread
);
795 if (current_thread
!= -1 && is_exited (current_ptid
))
796 ui_out_message (uiout
, 0, "\n\
797 The current thread <Thread ID %d> has terminated. See `help thread'.\n",
800 && current_thread
== -1
801 && ptid_equal (current_ptid
, null_ptid
))
802 ui_out_message (uiout
, 0, "\n\
803 No selected thread. See `help thread'.\n");
808 /* Print information about currently known threads
810 * Note: this has the drawback that it _really_ switches
811 * threads, which frees the frame cache. A no-side
812 * effects info-threads command would be nicer.
816 info_threads_command (char *arg
, int from_tty
)
818 print_thread_info (uiout
, -1, -1);
821 /* Switch from one thread to another. */
824 switch_to_thread (ptid_t ptid
)
826 if (ptid_equal (ptid
, inferior_ptid
))
829 inferior_ptid
= ptid
;
830 reinit_frame_cache ();
831 registers_changed ();
833 /* We don't check for is_stopped, because we're called at times
834 while in the TARGET_RUNNING state, e.g., while handling an
836 if (!ptid_equal (inferior_ptid
, null_ptid
)
838 && !is_executing (ptid
))
839 stop_pc
= read_pc ();
841 stop_pc
= ~(CORE_ADDR
) 0;
845 restore_current_thread (ptid_t ptid
)
847 switch_to_thread (ptid
);
851 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
853 struct frame_info
*frame
= NULL
;
856 gdb_assert (frame_level
>= 0);
858 /* Restore by level first, check if the frame id is the same as
859 expected. If that fails, try restoring by frame id. If that
860 fails, nothing to do, just warn the user. */
863 frame
= find_relative_frame (get_current_frame (), &count
);
866 /* Either the frame ids match, of they're both invalid. The
867 latter case is not failsafe, but since it's highly unlikely
868 the search by level finds the wrong frame, it's 99.9(9)% of
869 the time (for all practical purposes) safe. */
870 && (frame_id_eq (get_frame_id (frame
), a_frame_id
)
871 /* Note: could be better to check every frame_id
872 member for equality here. */
873 || (!frame_id_p (get_frame_id (frame
))
874 && !frame_id_p (a_frame_id
))))
876 /* Cool, all is fine. */
877 select_frame (frame
);
881 frame
= frame_find_by_id (a_frame_id
);
884 /* Cool, refound it. */
885 select_frame (frame
);
889 /* Nothing else to do, the frame layout really changed. Select the
890 innermost stack frame. */
891 select_frame (get_current_frame ());
894 if (!ui_out_is_mi_like_p (uiout
))
897 Couldn't restore frame #%d in current thread, at reparsed frame #0\n"),
899 /* For MI, we should probably have a notification about
900 current frame change. But this error is not very
901 likely, so don't bother for now. */
902 print_stack_frame (get_selected_frame (NULL
), 1, SRC_LINE
);
906 struct current_thread_cleanup
908 ptid_t inferior_ptid
;
909 struct frame_id selected_frame_id
;
910 int selected_frame_level
;
915 do_restore_current_thread_cleanup (void *arg
)
917 struct thread_info
*tp
;
918 struct current_thread_cleanup
*old
= arg
;
920 tp
= find_thread_pid (old
->inferior_ptid
);
922 /* If the previously selected thread belonged to a process that has
923 in the mean time been deleted (due to normal exit, detach, etc.),
924 then don't revert back to it, but instead simply drop back to no
927 && find_inferior_pid (ptid_get_pid (tp
->ptid
)) != NULL
)
928 restore_current_thread (old
->inferior_ptid
);
930 restore_current_thread (null_ptid
);
932 /* The running state of the originally selected thread may have
933 changed, so we have to recheck it here. */
934 if (!ptid_equal (inferior_ptid
, null_ptid
)
936 && is_stopped (inferior_ptid
)
937 && target_has_registers
939 && target_has_memory
)
940 restore_selected_frame (old
->selected_frame_id
,
941 old
->selected_frame_level
);
945 restore_current_thread_cleanup_dtor (void *arg
)
947 struct current_thread_cleanup
*old
= arg
;
948 struct thread_info
*tp
;
949 tp
= find_thread_pid (old
->inferior_ptid
);
956 make_cleanup_restore_current_thread (void)
958 struct thread_info
*tp
;
959 struct frame_info
*frame
;
960 struct current_thread_cleanup
*old
;
962 old
= xmalloc (sizeof (struct current_thread_cleanup
));
963 old
->inferior_ptid
= inferior_ptid
;
965 if (!ptid_equal (inferior_ptid
, null_ptid
))
967 old
->was_stopped
= is_stopped (inferior_ptid
);
969 && target_has_registers
971 && target_has_memory
)
972 frame
= get_selected_frame (NULL
);
976 old
->selected_frame_id
= get_frame_id (frame
);
977 old
->selected_frame_level
= frame_relative_level (frame
);
979 tp
= find_thread_pid (inferior_ptid
);
984 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
985 restore_current_thread_cleanup_dtor
);
988 /* Apply a GDB command to a list of threads. List syntax is a whitespace
989 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
990 of two numbers seperated by a hyphen. Examples:
992 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
993 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
994 thread apply all p x/i $pc Apply x/i $pc cmd to all threads
998 thread_apply_all_command (char *cmd
, int from_tty
)
1000 struct thread_info
*tp
;
1001 struct cleanup
*old_chain
;
1004 if (cmd
== NULL
|| *cmd
== '\000')
1005 error (_("Please specify a command following the thread ID list"));
1008 target_find_new_threads ();
1010 old_chain
= make_cleanup_restore_current_thread ();
1012 /* Save a copy of the command in case it is clobbered by
1014 saved_cmd
= xstrdup (cmd
);
1015 make_cleanup (xfree
, saved_cmd
);
1016 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1017 if (thread_alive (tp
))
1019 switch_to_thread (tp
->ptid
);
1021 printf_filtered (_("\nThread %d (%s):\n"),
1022 tp
->num
, target_pid_to_str (inferior_ptid
));
1023 execute_command (cmd
, from_tty
);
1024 strcpy (cmd
, saved_cmd
); /* Restore exact command used previously */
1027 do_cleanups (old_chain
);
1031 thread_apply_command (char *tidlist
, int from_tty
)
1035 struct cleanup
*old_chain
;
1038 if (tidlist
== NULL
|| *tidlist
== '\000')
1039 error (_("Please specify a thread ID list"));
1041 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha (*cmd
); cmd
++);
1044 error (_("Please specify a command following the thread ID list"));
1046 /* Save a copy of the command in case it is clobbered by
1048 saved_cmd
= xstrdup (cmd
);
1049 old_chain
= make_cleanup (xfree
, saved_cmd
);
1050 while (tidlist
< cmd
)
1052 struct thread_info
*tp
;
1055 start
= strtol (tidlist
, &p
, 10);
1057 error (_("Error parsing %s"), tidlist
);
1060 while (*tidlist
== ' ' || *tidlist
== '\t')
1063 if (*tidlist
== '-') /* Got a range of IDs? */
1065 tidlist
++; /* Skip the - */
1066 end
= strtol (tidlist
, &p
, 10);
1068 error (_("Error parsing %s"), tidlist
);
1071 while (*tidlist
== ' ' || *tidlist
== '\t')
1077 make_cleanup_restore_current_thread ();
1079 for (; start
<= end
; start
++)
1081 tp
= find_thread_id (start
);
1084 warning (_("Unknown thread %d."), start
);
1085 else if (!thread_alive (tp
))
1086 warning (_("Thread %d has terminated."), start
);
1089 switch_to_thread (tp
->ptid
);
1091 printf_filtered (_("\nThread %d (%s):\n"), tp
->num
,
1092 target_pid_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 (ptid_equal (inferior_ptid
, null_ptid
))
1113 error (_("No thread selected"));
1115 if (target_has_stack
)
1117 if (is_exited (inferior_ptid
))
1118 printf_filtered (_("[Current thread is %d (%s) (exited)]\n"),
1119 pid_to_thread_id (inferior_ptid
),
1120 target_pid_to_str (inferior_ptid
));
1122 printf_filtered (_("[Current thread is %d (%s)]\n"),
1123 pid_to_thread_id (inferior_ptid
),
1124 target_pid_to_str (inferior_ptid
));
1127 error (_("No stack."));
1131 gdb_thread_select (uiout
, tidstr
, NULL
);
1134 /* Print notices when new threads are attached and detached. */
1135 int print_thread_events
= 1;
1137 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1138 struct cmd_list_element
*c
, const char *value
)
1140 fprintf_filtered (file
, _("\
1141 Printing of thread events is %s.\n"),
1146 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr
)
1149 struct thread_info
*tp
;
1151 num
= value_as_long (parse_and_eval (tidstr
));
1153 tp
= find_thread_id (num
);
1156 error (_("Thread ID %d not known."), num
);
1158 if (!thread_alive (tp
))
1159 error (_("Thread ID %d has terminated."), num
);
1161 switch_to_thread (tp
->ptid
);
1163 annotate_thread_changed ();
1165 ui_out_text (uiout
, "[Switching to thread ");
1166 ui_out_field_int (uiout
, "new-thread-id", pid_to_thread_id (inferior_ptid
));
1167 ui_out_text (uiout
, " (");
1168 ui_out_text (uiout
, target_pid_to_str (inferior_ptid
));
1169 ui_out_text (uiout
, ")]");
1171 /* Note that we can't reach this with an exited thread, due to the
1172 thread_alive check above. */
1173 if (tp
->state_
== THREAD_RUNNING
)
1174 ui_out_text (uiout
, "(running)\n");
1176 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1178 /* Since the current thread may have changed, see if there is any
1179 exited thread we can now delete. */
1186 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
1188 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
1189 error_message
, RETURN_MASK_ALL
) < 0)
1194 /* Commands with a prefix of `thread'. */
1195 struct cmd_list_element
*thread_cmd_list
= NULL
;
1198 _initialize_thread (void)
1200 static struct cmd_list_element
*thread_apply_list
= NULL
;
1202 add_info ("threads", info_threads_command
,
1203 _("IDs of currently known threads."));
1205 add_prefix_cmd ("thread", class_run
, thread_command
, _("\
1206 Use this command to switch between threads.\n\
1207 The new thread ID must be currently known."),
1208 &thread_cmd_list
, "thread ", 1, &cmdlist
);
1210 add_prefix_cmd ("apply", class_run
, thread_apply_command
,
1211 _("Apply a command to a list of threads."),
1212 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
1214 add_cmd ("all", class_run
, thread_apply_all_command
,
1215 _("Apply a command to all threads."), &thread_apply_list
);
1218 add_com_alias ("t", "thread", class_run
, 1);
1220 add_setshow_boolean_cmd ("thread-events", no_class
,
1221 &print_thread_events
, _("\
1222 Set printing of thread events (such as thread start and exit)."), _("\
1223 Show printing of thread events (such as thread start and exit)."), NULL
,
1225 show_print_thread_events
,
1226 &setprintlist
, &showprintlist
);