1 /* Multi-process/thread control for GDB, the GNU debugger.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
29 #include "gdbthread.h"
37 #include <sys/types.h>
42 #include "cli/cli-decode.h"
43 #include "gdb_regex.h"
44 #include "cli/cli-utils.h"
45 #include "thread-fsm.h"
46 #include "tid-parse.h"
48 /* Definition of struct thread_info exported to gdbthread.h. */
50 /* Prototypes for exported functions. */
52 void _initialize_thread (void);
54 /* Prototypes for local functions. */
56 struct thread_info
*thread_list
= NULL
;
57 static int highest_thread_num
;
59 /* True if any thread is, or may be executing. We need to track this
60 separately because until we fully sync the thread list, we won't
61 know whether the target is fully stopped, even if we see stop
62 events for all known threads, because any of those threads may have
63 spawned new threads we haven't heard of yet. */
64 static int threads_executing
;
66 static void thread_apply_all_command (char *, int);
67 static int thread_alive (struct thread_info
*);
68 static void info_threads_command (char *, int);
69 static void thread_apply_command (char *, int);
70 static void restore_current_thread (ptid_t
);
72 /* Data to cleanup thread array. */
74 struct thread_array_cleanup
76 /* Array of thread pointers used to set
78 struct thread_info
**tp_array
;
80 /* Thread count in the array. */
86 inferior_thread (void)
88 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
93 /* Delete the breakpoint pointed at by BP_P, if there's one. */
96 delete_thread_breakpoint (struct breakpoint
**bp_p
)
100 delete_breakpoint (*bp_p
);
106 delete_step_resume_breakpoint (struct thread_info
*tp
)
109 delete_thread_breakpoint (&tp
->control
.step_resume_breakpoint
);
113 delete_exception_resume_breakpoint (struct thread_info
*tp
)
116 delete_thread_breakpoint (&tp
->control
.exception_resume_breakpoint
);
119 /* See gdbthread.h. */
122 delete_single_step_breakpoints (struct thread_info
*tp
)
125 delete_thread_breakpoint (&tp
->control
.single_step_breakpoints
);
128 /* Delete the breakpoint pointed at by BP_P at the next stop, if
132 delete_at_next_stop (struct breakpoint
**bp
)
136 (*bp
)->disposition
= disp_del_at_next_stop
;
141 /* See gdbthread.h. */
144 thread_has_single_step_breakpoints_set (struct thread_info
*tp
)
146 return tp
->control
.single_step_breakpoints
!= NULL
;
149 /* See gdbthread.h. */
152 thread_has_single_step_breakpoint_here (struct thread_info
*tp
,
153 struct address_space
*aspace
,
156 struct breakpoint
*ss_bps
= tp
->control
.single_step_breakpoints
;
158 return (ss_bps
!= NULL
159 && breakpoint_has_location_inserted_here (ss_bps
, aspace
, addr
));
162 /* See gdbthread.h. */
165 thread_cancel_execution_command (struct thread_info
*thr
)
167 if (thr
->thread_fsm
!= NULL
)
169 thread_fsm_clean_up (thr
->thread_fsm
, thr
);
170 thread_fsm_delete (thr
->thread_fsm
);
171 thr
->thread_fsm
= NULL
;
176 clear_thread_inferior_resources (struct thread_info
*tp
)
178 /* NOTE: this will take care of any left-over step_resume breakpoints,
179 but not any user-specified thread-specific breakpoints. We can not
180 delete the breakpoint straight-off, because the inferior might not
181 be stopped at the moment. */
182 delete_at_next_stop (&tp
->control
.step_resume_breakpoint
);
183 delete_at_next_stop (&tp
->control
.exception_resume_breakpoint
);
184 delete_at_next_stop (&tp
->control
.single_step_breakpoints
);
186 delete_longjmp_breakpoint_at_next_stop (tp
->global_num
);
188 bpstat_clear (&tp
->control
.stop_bpstat
);
190 btrace_teardown (tp
);
192 thread_cancel_execution_command (tp
);
196 free_thread (struct thread_info
*tp
)
200 if (tp
->private_dtor
)
201 tp
->private_dtor (tp
->priv
);
211 init_thread_list (void)
213 struct thread_info
*tp
, *tpnext
;
215 highest_thread_num
= 0;
220 for (tp
= thread_list
; tp
; tp
= tpnext
)
227 threads_executing
= 0;
230 /* Allocate a new thread of inferior INF with target id PTID and add
231 it to the thread list. */
233 static struct thread_info
*
234 new_thread (struct inferior
*inf
, ptid_t ptid
)
236 struct thread_info
*tp
;
238 gdb_assert (inf
!= NULL
);
240 tp
= XCNEW (struct thread_info
);
243 tp
->global_num
= ++highest_thread_num
;
245 tp
->per_inf_num
= ++inf
->highest_thread_num
;
247 if (thread_list
== NULL
)
251 struct thread_info
*last
;
253 for (last
= thread_list
; last
->next
!= NULL
; last
= last
->next
)
258 /* Nothing to follow yet. */
259 tp
->pending_follow
.kind
= TARGET_WAITKIND_SPURIOUS
;
260 tp
->state
= THREAD_STOPPED
;
261 tp
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_IGNORE
;
267 add_thread_silent (ptid_t ptid
)
269 struct thread_info
*tp
;
270 struct inferior
*inf
= find_inferior_ptid (ptid
);
271 gdb_assert (inf
!= NULL
);
273 tp
= find_thread_ptid (ptid
);
275 /* Found an old thread with the same id. It has to be dead,
276 otherwise we wouldn't be adding a new thread with the same id.
277 The OS is reusing this id --- delete it, and recreate a new
280 /* In addition to deleting the thread, if this is the current
281 thread, then we need to take care that delete_thread doesn't
282 really delete the thread if it is inferior_ptid. Create a
283 new template thread in the list with an invalid ptid, switch
284 to it, delete the original thread, reset the new thread's
285 ptid, and switch to it. */
287 if (ptid_equal (inferior_ptid
, ptid
))
289 tp
= new_thread (inf
, null_ptid
);
291 /* Make switch_to_thread not read from the thread. */
292 tp
->state
= THREAD_EXITED
;
293 switch_to_thread (null_ptid
);
295 /* Now we can delete it. */
296 delete_thread (ptid
);
298 /* Now reset its ptid, and reswitch inferior_ptid to it. */
300 tp
->state
= THREAD_STOPPED
;
301 switch_to_thread (ptid
);
303 observer_notify_new_thread (tp
);
309 /* Just go ahead and delete it. */
310 delete_thread (ptid
);
313 tp
= new_thread (inf
, ptid
);
314 observer_notify_new_thread (tp
);
320 add_thread_with_info (ptid_t ptid
, struct private_thread_info
*priv
)
322 struct thread_info
*result
= add_thread_silent (ptid
);
326 if (print_thread_events
)
327 printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid
));
329 annotate_new_thread ();
334 add_thread (ptid_t ptid
)
336 return add_thread_with_info (ptid
, NULL
);
339 /* Add TP to the end of the step-over chain LIST_P. */
342 step_over_chain_enqueue (struct thread_info
**list_p
, struct thread_info
*tp
)
344 gdb_assert (tp
->step_over_next
== NULL
);
345 gdb_assert (tp
->step_over_prev
== NULL
);
350 tp
->step_over_prev
= tp
->step_over_next
= tp
;
354 struct thread_info
*head
= *list_p
;
355 struct thread_info
*tail
= head
->step_over_prev
;
357 tp
->step_over_prev
= tail
;
358 tp
->step_over_next
= head
;
359 head
->step_over_prev
= tp
;
360 tail
->step_over_next
= tp
;
364 /* Remove TP from step-over chain LIST_P. */
367 step_over_chain_remove (struct thread_info
**list_p
, struct thread_info
*tp
)
369 gdb_assert (tp
->step_over_next
!= NULL
);
370 gdb_assert (tp
->step_over_prev
!= NULL
);
374 if (tp
== tp
->step_over_next
)
377 *list_p
= tp
->step_over_next
;
380 tp
->step_over_prev
->step_over_next
= tp
->step_over_next
;
381 tp
->step_over_next
->step_over_prev
= tp
->step_over_prev
;
382 tp
->step_over_prev
= tp
->step_over_next
= NULL
;
385 /* See gdbthread.h. */
388 thread_step_over_chain_next (struct thread_info
*tp
)
390 struct thread_info
*next
= tp
->step_over_next
;
392 return (next
== step_over_queue_head
? NULL
: next
);
395 /* See gdbthread.h. */
398 thread_is_in_step_over_chain (struct thread_info
*tp
)
400 return (tp
->step_over_next
!= NULL
);
403 /* See gdbthread.h. */
406 thread_step_over_chain_enqueue (struct thread_info
*tp
)
408 step_over_chain_enqueue (&step_over_queue_head
, tp
);
411 /* See gdbthread.h. */
414 thread_step_over_chain_remove (struct thread_info
*tp
)
416 step_over_chain_remove (&step_over_queue_head
, tp
);
419 /* Delete thread PTID. If SILENT, don't notify the observer of this
422 delete_thread_1 (ptid_t ptid
, int silent
)
424 struct thread_info
*tp
, *tpprev
;
428 for (tp
= thread_list
; tp
; tpprev
= tp
, tp
= tp
->next
)
429 if (ptid_equal (tp
->ptid
, ptid
))
435 /* Dead threads don't need to step-over. Remove from queue. */
436 if (tp
->step_over_next
!= NULL
)
437 thread_step_over_chain_remove (tp
);
439 /* If this is the current thread, or there's code out there that
440 relies on it existing (refcount > 0) we can't delete yet. Mark
441 it as exited, and notify it. */
443 || ptid_equal (tp
->ptid
, inferior_ptid
))
445 if (tp
->state
!= THREAD_EXITED
)
447 observer_notify_thread_exit (tp
, silent
);
449 /* Tag it as exited. */
450 tp
->state
= THREAD_EXITED
;
452 /* Clear breakpoints, etc. associated with this thread. */
453 clear_thread_inferior_resources (tp
);
456 /* Will be really deleted some other time. */
460 /* Notify thread exit, but only if we haven't already. */
461 if (tp
->state
!= THREAD_EXITED
)
462 observer_notify_thread_exit (tp
, silent
);
464 /* Tag it as exited. */
465 tp
->state
= THREAD_EXITED
;
466 clear_thread_inferior_resources (tp
);
469 tpprev
->next
= tp
->next
;
471 thread_list
= tp
->next
;
476 /* Delete thread PTID and notify of thread exit. If this is
477 inferior_ptid, don't actually delete it, but tag it as exited and
478 do the notification. If PTID is the user selected thread, clear
481 delete_thread (ptid_t ptid
)
483 delete_thread_1 (ptid
, 0 /* not silent */);
487 delete_thread_silent (ptid_t ptid
)
489 delete_thread_1 (ptid
, 1 /* silent */);
493 find_thread_global_id (int global_id
)
495 struct thread_info
*tp
;
497 for (tp
= thread_list
; tp
; tp
= tp
->next
)
498 if (tp
->global_num
== global_id
)
504 static struct thread_info
*
505 find_thread_id (struct inferior
*inf
, int thr_num
)
507 struct thread_info
*tp
;
509 for (tp
= thread_list
; tp
; tp
= tp
->next
)
510 if (tp
->inf
== inf
&& tp
->per_inf_num
== thr_num
)
516 /* Find a thread_info by matching PTID. */
518 find_thread_ptid (ptid_t ptid
)
520 struct thread_info
*tp
;
522 for (tp
= thread_list
; tp
; tp
= tp
->next
)
523 if (ptid_equal (tp
->ptid
, ptid
))
530 * Thread iterator function.
532 * Calls a callback function once for each thread, so long as
533 * the callback function returns false. If the callback function
534 * returns true, the iteration will end and the current thread
535 * will be returned. This can be useful for implementing a
536 * search for a thread with arbitrary attributes, or for applying
537 * some operation to every thread.
539 * FIXME: some of the existing functionality, such as
540 * "Thread apply all", might be rewritten using this functionality.
544 iterate_over_threads (int (*callback
) (struct thread_info
*, void *),
547 struct thread_info
*tp
, *next
;
549 for (tp
= thread_list
; tp
; tp
= next
)
552 if ((*callback
) (tp
, data
))
563 struct thread_info
*tp
;
565 for (tp
= thread_list
; tp
; tp
= tp
->next
)
572 valid_global_thread_id (int global_id
)
574 struct thread_info
*tp
;
576 for (tp
= thread_list
; tp
; tp
= tp
->next
)
577 if (tp
->global_num
== global_id
)
584 ptid_to_global_thread_id (ptid_t ptid
)
586 struct thread_info
*tp
;
588 for (tp
= thread_list
; tp
; tp
= tp
->next
)
589 if (ptid_equal (tp
->ptid
, ptid
))
590 return tp
->global_num
;
596 global_thread_id_to_ptid (int global_id
)
598 struct thread_info
*thread
= find_thread_global_id (global_id
);
603 return minus_one_ptid
;
607 in_thread_list (ptid_t ptid
)
609 struct thread_info
*tp
;
611 for (tp
= thread_list
; tp
; tp
= tp
->next
)
612 if (ptid_equal (tp
->ptid
, ptid
))
615 return 0; /* Never heard of 'im. */
618 /* Finds the first thread of the inferior given by PID. If PID is -1,
619 return the first thread in the list. */
622 first_thread_of_process (int pid
)
624 struct thread_info
*tp
, *ret
= NULL
;
626 for (tp
= thread_list
; tp
; tp
= tp
->next
)
627 if (pid
== -1 || ptid_get_pid (tp
->ptid
) == pid
)
628 if (ret
== NULL
|| tp
->global_num
< ret
->global_num
)
635 any_thread_of_process (int pid
)
637 struct thread_info
*tp
;
639 gdb_assert (pid
!= 0);
641 /* Prefer the current thread. */
642 if (ptid_get_pid (inferior_ptid
) == pid
)
643 return inferior_thread ();
645 ALL_NON_EXITED_THREADS (tp
)
646 if (ptid_get_pid (tp
->ptid
) == pid
)
653 any_live_thread_of_process (int pid
)
655 struct thread_info
*curr_tp
= NULL
;
656 struct thread_info
*tp
;
657 struct thread_info
*tp_executing
= NULL
;
659 gdb_assert (pid
!= 0);
661 /* Prefer the current thread if it's not executing. */
662 if (ptid_get_pid (inferior_ptid
) == pid
)
664 /* If the current thread is dead, forget it. If it's not
665 executing, use it. Otherwise, still choose it (below), but
666 only if no other non-executing thread is found. */
667 curr_tp
= inferior_thread ();
668 if (curr_tp
->state
== THREAD_EXITED
)
670 else if (!curr_tp
->executing
)
674 ALL_NON_EXITED_THREADS (tp
)
675 if (ptid_get_pid (tp
->ptid
) == pid
)
683 /* If both the current thread and all live threads are executing,
684 prefer the current thread. */
688 /* Otherwise, just return an executing thread, if any. */
692 /* Print a list of thread ids currently known, and the total number of
693 threads. To be used from within catch_errors. */
695 do_captured_list_thread_ids (struct ui_out
*uiout
, void *arg
)
697 struct thread_info
*tp
;
699 struct cleanup
*cleanup_chain
;
700 int current_thread
= -1;
702 update_thread_list ();
704 cleanup_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "thread-ids");
706 for (tp
= thread_list
; tp
; tp
= tp
->next
)
708 if (tp
->state
== THREAD_EXITED
)
711 if (ptid_equal (tp
->ptid
, inferior_ptid
))
712 current_thread
= tp
->global_num
;
715 uiout
->field_int ("thread-id", tp
->global_num
);
718 do_cleanups (cleanup_chain
);
720 if (current_thread
!= -1)
721 uiout
->field_int ("current-thread-id", current_thread
);
722 uiout
->field_int ("number-of-threads", num
);
726 /* Official gdblib interface function to get a list of thread ids and
729 gdb_list_thread_ids (struct ui_out
*uiout
, char **error_message
)
731 if (catch_exceptions_with_msg (uiout
, do_captured_list_thread_ids
, NULL
,
732 error_message
, RETURN_MASK_ALL
) < 0)
737 /* Return true if TP is an active thread. */
739 thread_alive (struct thread_info
*tp
)
741 if (tp
->state
== THREAD_EXITED
)
743 if (!target_thread_alive (tp
->ptid
))
748 /* See gdbthreads.h. */
753 struct thread_info
*tp
, *tmp
;
755 ALL_THREADS_SAFE (tp
, tmp
)
757 if (!thread_alive (tp
))
758 delete_thread (tp
->ptid
);
762 /* See gdbthreads.h. */
765 delete_exited_threads (void)
767 struct thread_info
*tp
, *tmp
;
769 ALL_THREADS_SAFE (tp
, tmp
)
771 if (tp
->state
== THREAD_EXITED
)
772 delete_thread (tp
->ptid
);
776 /* Disable storing stack temporaries for the thread whose id is
780 disable_thread_stack_temporaries (void *data
)
782 ptid_t
*pd
= (ptid_t
*) data
;
783 struct thread_info
*tp
= find_thread_ptid (*pd
);
787 tp
->stack_temporaries_enabled
= 0;
788 VEC_free (value_ptr
, tp
->stack_temporaries
);
794 /* Enable storing stack temporaries for thread with id PTID and return a
795 cleanup which can disable and clear the stack temporaries. */
798 enable_thread_stack_temporaries (ptid_t ptid
)
800 struct thread_info
*tp
= find_thread_ptid (ptid
);
804 gdb_assert (tp
!= NULL
);
806 tp
->stack_temporaries_enabled
= 1;
807 tp
->stack_temporaries
= NULL
;
808 data
= XNEW (ptid_t
);
810 c
= make_cleanup (disable_thread_stack_temporaries
, data
);
815 /* Return non-zero value if stack temporaies are enabled for the thread
819 thread_stack_temporaries_enabled_p (ptid_t ptid
)
821 struct thread_info
*tp
= find_thread_ptid (ptid
);
826 return tp
->stack_temporaries_enabled
;
829 /* Push V on to the stack temporaries of the thread with id PTID. */
832 push_thread_stack_temporary (ptid_t ptid
, struct value
*v
)
834 struct thread_info
*tp
= find_thread_ptid (ptid
);
836 gdb_assert (tp
!= NULL
&& tp
->stack_temporaries_enabled
);
837 VEC_safe_push (value_ptr
, tp
->stack_temporaries
, v
);
840 /* Return 1 if VAL is among the stack temporaries of the thread
841 with id PTID. Return 0 otherwise. */
844 value_in_thread_stack_temporaries (struct value
*val
, ptid_t ptid
)
846 struct thread_info
*tp
= find_thread_ptid (ptid
);
848 gdb_assert (tp
!= NULL
&& tp
->stack_temporaries_enabled
);
849 if (!VEC_empty (value_ptr
, tp
->stack_temporaries
))
854 for (i
= 0; VEC_iterate (value_ptr
, tp
->stack_temporaries
, i
, v
); i
++)
862 /* Return the last of the stack temporaries for thread with id PTID.
863 Return NULL if there are no stack temporaries for the thread. */
866 get_last_thread_stack_temporary (ptid_t ptid
)
868 struct value
*lastval
= NULL
;
869 struct thread_info
*tp
= find_thread_ptid (ptid
);
871 gdb_assert (tp
!= NULL
);
872 if (!VEC_empty (value_ptr
, tp
->stack_temporaries
))
873 lastval
= VEC_last (value_ptr
, tp
->stack_temporaries
);
879 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
881 struct inferior
*inf
;
882 struct thread_info
*tp
;
884 /* It can happen that what we knew as the target inferior id
885 changes. E.g, target remote may only discover the remote process
886 pid after adding the inferior to GDB's list. */
887 inf
= find_inferior_ptid (old_ptid
);
888 inf
->pid
= ptid_get_pid (new_ptid
);
890 tp
= find_thread_ptid (old_ptid
);
893 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
896 /* See gdbthread.h. */
899 set_resumed (ptid_t ptid
, int resumed
)
901 struct thread_info
*tp
;
902 int all
= ptid_equal (ptid
, minus_one_ptid
);
904 if (all
|| ptid_is_pid (ptid
))
906 for (tp
= thread_list
; tp
; tp
= tp
->next
)
907 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
908 tp
->resumed
= resumed
;
912 tp
= find_thread_ptid (ptid
);
913 gdb_assert (tp
!= NULL
);
914 tp
->resumed
= resumed
;
918 /* Helper for set_running, that marks one thread either running or
922 set_running_thread (struct thread_info
*tp
, int running
)
926 if (running
&& tp
->state
== THREAD_STOPPED
)
928 tp
->state
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
932 /* If the thread is now marked stopped, remove it from
933 the step-over queue, so that we don't try to resume
934 it until the user wants it to. */
935 if (tp
->step_over_next
!= NULL
)
936 thread_step_over_chain_remove (tp
);
943 set_running (ptid_t ptid
, int running
)
945 struct thread_info
*tp
;
946 int all
= ptid_equal (ptid
, minus_one_ptid
);
949 /* We try not to notify the observer if no thread has actually changed
950 the running state -- merely to reduce the number of messages to
951 frontend. Frontend is supposed to handle multiple *running just fine. */
952 if (all
|| ptid_is_pid (ptid
))
954 for (tp
= thread_list
; tp
; tp
= tp
->next
)
955 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
957 if (tp
->state
== THREAD_EXITED
)
960 if (set_running_thread (tp
, running
))
966 tp
= find_thread_ptid (ptid
);
967 gdb_assert (tp
!= NULL
);
968 gdb_assert (tp
->state
!= THREAD_EXITED
);
969 if (set_running_thread (tp
, running
))
973 observer_notify_target_resumed (ptid
);
977 is_thread_state (ptid_t ptid
, enum thread_state state
)
979 struct thread_info
*tp
;
981 tp
= find_thread_ptid (ptid
);
983 return tp
->state
== state
;
987 is_stopped (ptid_t ptid
)
989 return is_thread_state (ptid
, THREAD_STOPPED
);
993 is_exited (ptid_t ptid
)
995 return is_thread_state (ptid
, THREAD_EXITED
);
999 is_running (ptid_t ptid
)
1001 return is_thread_state (ptid
, THREAD_RUNNING
);
1005 is_executing (ptid_t ptid
)
1007 struct thread_info
*tp
;
1009 tp
= find_thread_ptid (ptid
);
1011 return tp
->executing
;
1015 set_executing (ptid_t ptid
, int executing
)
1017 struct thread_info
*tp
;
1018 int all
= ptid_equal (ptid
, minus_one_ptid
);
1020 if (all
|| ptid_is_pid (ptid
))
1022 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1023 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
1024 tp
->executing
= executing
;
1028 tp
= find_thread_ptid (ptid
);
1030 tp
->executing
= executing
;
1033 /* It only takes one running thread to spawn more threads.*/
1035 threads_executing
= 1;
1036 /* Only clear the flag if the caller is telling us everything is
1038 else if (ptid_equal (minus_one_ptid
, ptid
))
1039 threads_executing
= 0;
1042 /* See gdbthread.h. */
1045 threads_are_executing (void)
1047 return threads_executing
;
1051 set_stop_requested (ptid_t ptid
, int stop
)
1053 struct thread_info
*tp
;
1054 int all
= ptid_equal (ptid
, minus_one_ptid
);
1056 if (all
|| ptid_is_pid (ptid
))
1058 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1059 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
1060 tp
->stop_requested
= stop
;
1064 tp
= find_thread_ptid (ptid
);
1066 tp
->stop_requested
= stop
;
1069 /* Call the stop requested observer so other components of GDB can
1070 react to this request. */
1072 observer_notify_thread_stop_requested (ptid
);
1076 finish_thread_state (ptid_t ptid
)
1078 struct thread_info
*tp
;
1080 int any_started
= 0;
1082 all
= ptid_equal (ptid
, minus_one_ptid
);
1084 if (all
|| ptid_is_pid (ptid
))
1086 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1088 if (tp
->state
== THREAD_EXITED
)
1090 if (all
|| ptid_get_pid (ptid
) == ptid_get_pid (tp
->ptid
))
1092 if (set_running_thread (tp
, tp
->executing
))
1099 tp
= find_thread_ptid (ptid
);
1101 if (tp
->state
!= THREAD_EXITED
)
1103 if (set_running_thread (tp
, tp
->executing
))
1109 observer_notify_target_resumed (ptid
);
1113 finish_thread_state_cleanup (void *arg
)
1115 ptid_t
*ptid_p
= (ptid_t
*) arg
;
1119 finish_thread_state (*ptid_p
);
1122 /* See gdbthread.h. */
1125 validate_registers_access (void)
1127 /* No selected thread, no registers. */
1128 if (ptid_equal (inferior_ptid
, null_ptid
))
1129 error (_("No thread selected."));
1131 /* Don't try to read from a dead thread. */
1132 if (is_exited (inferior_ptid
))
1133 error (_("The current thread has terminated"));
1135 /* ... or from a spinning thread. FIXME: This isn't actually fully
1136 correct. It'll allow an user-requested access (e.g., "print $pc"
1137 at the prompt) when a thread is not executing for some internal
1138 reason, but is marked running from the user's perspective. E.g.,
1139 the thread is waiting for its turn in the step-over queue. */
1140 if (is_executing (inferior_ptid
))
1141 error (_("Selected thread is running."));
1144 /* See gdbthread.h. */
1147 can_access_registers_ptid (ptid_t ptid
)
1149 /* No thread, no registers. */
1150 if (ptid_equal (ptid
, null_ptid
))
1153 /* Don't try to read from a dead thread. */
1154 if (is_exited (ptid
))
1157 /* ... or from a spinning thread. FIXME: see validate_registers_access. */
1158 if (is_executing (ptid
))
1165 pc_in_thread_step_range (CORE_ADDR pc
, struct thread_info
*thread
)
1167 return (pc
>= thread
->control
.step_range_start
1168 && pc
< thread
->control
.step_range_end
);
1171 /* Helper for print_thread_info. Returns true if THR should be
1172 printed. If REQUESTED_THREADS, a list of GDB ids/ranges, is not
1173 NULL, only print THR if its ID is included in the list. GLOBAL_IDS
1174 is true if REQUESTED_THREADS is list of global IDs, false if a list
1175 of per-inferior thread ids. If PID is not -1, only print THR if it
1176 is a thread from the process PID. Otherwise, threads from all
1177 attached PIDs are printed. If both REQUESTED_THREADS is not NULL
1178 and PID is not -1, then the thread is printed if it belongs to the
1179 specified process. Otherwise, an error is raised. */
1182 should_print_thread (const char *requested_threads
, int default_inf_num
,
1183 int global_ids
, int pid
, struct thread_info
*thr
)
1185 if (requested_threads
!= NULL
&& *requested_threads
!= '\0')
1190 in_list
= number_is_in_list (requested_threads
, thr
->global_num
);
1192 in_list
= tid_is_in_list (requested_threads
, default_inf_num
,
1193 thr
->inf
->num
, thr
->per_inf_num
);
1198 if (pid
!= -1 && ptid_get_pid (thr
->ptid
) != pid
)
1200 if (requested_threads
!= NULL
&& *requested_threads
!= '\0')
1201 error (_("Requested thread not found in requested process"));
1205 if (thr
->state
== THREAD_EXITED
)
1211 /* Like print_thread_info, but in addition, GLOBAL_IDS indicates
1212 whether REQUESTED_THREADS is a list of global or per-inferior
1216 print_thread_info_1 (struct ui_out
*uiout
, char *requested_threads
,
1217 int global_ids
, int pid
,
1218 int show_global_ids
)
1220 struct thread_info
*tp
;
1221 ptid_t current_ptid
;
1222 struct cleanup
*old_chain
;
1223 const char *extra_info
, *name
, *target_id
;
1224 struct inferior
*inf
;
1225 int default_inf_num
= current_inferior ()->num
;
1227 update_thread_list ();
1228 current_ptid
= inferior_ptid
;
1230 /* We'll be switching threads temporarily. */
1231 old_chain
= make_cleanup_restore_current_thread ();
1233 /* For backward compatibility, we make a list for MI. A table is
1234 preferable for the CLI, though, because it shows table
1236 if (uiout
->is_mi_like_p ())
1237 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
1242 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1244 if (!should_print_thread (requested_threads
, default_inf_num
,
1245 global_ids
, pid
, tp
))
1253 if (requested_threads
== NULL
|| *requested_threads
== '\0')
1254 uiout
->message (_("No threads.\n"));
1256 uiout
->message (_("No threads match '%s'.\n"),
1258 do_cleanups (old_chain
);
1262 if (show_global_ids
|| uiout
->is_mi_like_p ())
1263 make_cleanup_ui_out_table_begin_end (uiout
, 5, n_threads
, "threads");
1265 make_cleanup_ui_out_table_begin_end (uiout
, 4, n_threads
, "threads");
1267 uiout
->table_header (1, ui_left
, "current", "");
1269 if (!uiout
->is_mi_like_p ())
1270 uiout
->table_header (4, ui_left
, "id-in-tg", "Id");
1271 if (show_global_ids
|| uiout
->is_mi_like_p ())
1272 uiout
->table_header (4, ui_left
, "id", "GId");
1273 uiout
->table_header (17, ui_left
, "target-id", "Target Id");
1274 uiout
->table_header (1, ui_left
, "frame", "Frame");
1275 uiout
->table_body ();
1278 ALL_THREADS_BY_INFERIOR (inf
, tp
)
1280 struct cleanup
*chain2
;
1283 if (!should_print_thread (requested_threads
, default_inf_num
,
1284 global_ids
, pid
, tp
))
1287 chain2
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
1289 if (uiout
->is_mi_like_p ())
1291 /* Compatibility. */
1292 if (ptid_equal (tp
->ptid
, current_ptid
))
1299 if (ptid_equal (tp
->ptid
, current_ptid
))
1300 uiout
->field_string ("current", "*");
1302 uiout
->field_skip ("current");
1305 if (!uiout
->is_mi_like_p ())
1306 uiout
->field_string ("id-in-tg", print_thread_id (tp
));
1308 if (show_global_ids
|| uiout
->is_mi_like_p ())
1309 uiout
->field_int ("id", tp
->global_num
);
1311 /* For the CLI, we stuff everything into the target-id field.
1312 This is a gross hack to make the output come out looking
1313 correct. The underlying problem here is that ui-out has no
1314 way to specify that a field's space allocation should be
1315 shared by several fields. For MI, we do the right thing
1318 target_id
= target_pid_to_str (tp
->ptid
);
1319 extra_info
= target_extra_thread_info (tp
);
1320 name
= tp
->name
? tp
->name
: target_thread_name (tp
);
1322 if (uiout
->is_mi_like_p ())
1324 uiout
->field_string ("target-id", target_id
);
1326 uiout
->field_string ("details", extra_info
);
1328 uiout
->field_string ("name", name
);
1332 struct cleanup
*str_cleanup
;
1335 if (extra_info
&& name
)
1336 contents
= xstrprintf ("%s \"%s\" (%s)", target_id
,
1338 else if (extra_info
)
1339 contents
= xstrprintf ("%s (%s)", target_id
, extra_info
);
1341 contents
= xstrprintf ("%s \"%s\"", target_id
, name
);
1343 contents
= xstrdup (target_id
);
1344 str_cleanup
= make_cleanup (xfree
, contents
);
1346 uiout
->field_string ("target-id", contents
);
1347 do_cleanups (str_cleanup
);
1350 if (tp
->state
== THREAD_RUNNING
)
1351 uiout
->text ("(running)\n");
1354 /* The switch below puts us at the top of the stack (leaf
1356 switch_to_thread (tp
->ptid
);
1357 print_stack_frame (get_selected_frame (NULL
),
1358 /* For MI output, print frame level. */
1359 uiout
->is_mi_like_p (),
1363 if (uiout
->is_mi_like_p ())
1365 char *state
= "stopped";
1367 if (tp
->state
== THREAD_RUNNING
)
1369 uiout
->field_string ("state", state
);
1372 core
= target_core_of_thread (tp
->ptid
);
1373 if (uiout
->is_mi_like_p () && core
!= -1)
1374 uiout
->field_int ("core", core
);
1376 do_cleanups (chain2
);
1379 /* Restores the current thread and the frame selected before
1380 the "info threads" command. */
1381 do_cleanups (old_chain
);
1383 if (pid
== -1 && requested_threads
== NULL
)
1385 if (uiout
->is_mi_like_p ()
1386 && !ptid_equal (inferior_ptid
, null_ptid
))
1388 int num
= ptid_to_global_thread_id (inferior_ptid
);
1390 gdb_assert (num
!= 0);
1391 uiout
->field_int ("current-thread-id", num
);
1394 if (!ptid_equal (inferior_ptid
, null_ptid
) && is_exited (inferior_ptid
))
1395 uiout
->message ("\n\
1396 The current thread <Thread ID %s> has terminated. See `help thread'.\n",
1397 print_thread_id (inferior_thread ()));
1398 else if (thread_list
!= NULL
1399 && ptid_equal (inferior_ptid
, null_ptid
))
1400 uiout
->message ("\n\
1401 No selected thread. See `help thread'.\n");
1405 /* See gdbthread.h. */
1408 print_thread_info (struct ui_out
*uiout
, char *requested_threads
, int pid
)
1410 print_thread_info_1 (uiout
, requested_threads
, 1, pid
, 0);
1413 /* Implementation of the "info threads" command.
1415 Note: this has the drawback that it _really_ switches
1416 threads, which frees the frame cache. A no-side
1417 effects info-threads command would be nicer. */
1420 info_threads_command (char *arg
, int from_tty
)
1422 int show_global_ids
= 0;
1425 && check_for_argument (&arg
, "-gid", sizeof ("-gid") - 1))
1427 arg
= skip_spaces (arg
);
1428 show_global_ids
= 1;
1431 print_thread_info_1 (current_uiout
, arg
, 0, -1, show_global_ids
);
1434 /* See gdbthread.h. */
1437 switch_to_thread_no_regs (struct thread_info
*thread
)
1439 struct inferior
*inf
;
1441 inf
= find_inferior_ptid (thread
->ptid
);
1442 gdb_assert (inf
!= NULL
);
1443 set_current_program_space (inf
->pspace
);
1444 set_current_inferior (inf
);
1446 inferior_ptid
= thread
->ptid
;
1447 stop_pc
= ~(CORE_ADDR
) 0;
1450 /* Switch from one thread to another. */
1453 switch_to_thread (ptid_t ptid
)
1455 /* Switch the program space as well, if we can infer it from the now
1456 current thread. Otherwise, it's up to the caller to select the
1458 if (!ptid_equal (ptid
, null_ptid
))
1460 struct inferior
*inf
;
1462 inf
= find_inferior_ptid (ptid
);
1463 gdb_assert (inf
!= NULL
);
1464 set_current_program_space (inf
->pspace
);
1465 set_current_inferior (inf
);
1468 if (ptid_equal (ptid
, inferior_ptid
))
1471 inferior_ptid
= ptid
;
1472 reinit_frame_cache ();
1474 /* We don't check for is_stopped, because we're called at times
1475 while in the TARGET_RUNNING state, e.g., while handling an
1477 if (!ptid_equal (inferior_ptid
, null_ptid
)
1478 && !is_exited (ptid
)
1479 && !is_executing (ptid
))
1480 stop_pc
= regcache_read_pc (get_thread_regcache (ptid
));
1482 stop_pc
= ~(CORE_ADDR
) 0;
1486 restore_current_thread (ptid_t ptid
)
1488 switch_to_thread (ptid
);
1492 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
1494 struct frame_info
*frame
= NULL
;
1497 /* This means there was no selected frame. */
1498 if (frame_level
== -1)
1500 select_frame (NULL
);
1504 gdb_assert (frame_level
>= 0);
1506 /* Restore by level first, check if the frame id is the same as
1507 expected. If that fails, try restoring by frame id. If that
1508 fails, nothing to do, just warn the user. */
1510 count
= frame_level
;
1511 frame
= find_relative_frame (get_current_frame (), &count
);
1514 /* The frame ids must match - either both valid or both outer_frame_id.
1515 The latter case is not failsafe, but since it's highly unlikely
1516 the search by level finds the wrong frame, it's 99.9(9)% of
1517 the time (for all practical purposes) safe. */
1518 && frame_id_eq (get_frame_id (frame
), a_frame_id
))
1520 /* Cool, all is fine. */
1521 select_frame (frame
);
1525 frame
= frame_find_by_id (a_frame_id
);
1528 /* Cool, refound it. */
1529 select_frame (frame
);
1533 /* Nothing else to do, the frame layout really changed. Select the
1534 innermost stack frame. */
1535 select_frame (get_current_frame ());
1537 /* Warn the user. */
1538 if (frame_level
> 0 && !current_uiout
->is_mi_like_p ())
1540 warning (_("Couldn't restore frame #%d in "
1541 "current thread. Bottom (innermost) frame selected:"),
1543 /* For MI, we should probably have a notification about
1544 current frame change. But this error is not very
1545 likely, so don't bother for now. */
1546 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
1550 /* Data used by the cleanup installed by
1551 'make_cleanup_restore_current_thread'. */
1553 struct current_thread_cleanup
1555 /* Next in list of currently installed 'struct
1556 current_thread_cleanup' cleanups. See
1557 'current_thread_cleanup_chain' below. */
1558 struct current_thread_cleanup
*next
;
1560 ptid_t inferior_ptid
;
1561 struct frame_id selected_frame_id
;
1562 int selected_frame_level
;
1568 /* A chain of currently installed 'struct current_thread_cleanup'
1569 cleanups. Restoring the previously selected thread looks up the
1570 old thread in the thread list by ptid. If the thread changes ptid,
1571 we need to update the cleanup's thread structure so the look up
1573 static struct current_thread_cleanup
*current_thread_cleanup_chain
;
1575 /* A thread_ptid_changed observer. Update all currently installed
1576 current_thread_cleanup cleanups that want to switch back to
1577 OLD_PTID to switch back to NEW_PTID instead. */
1580 restore_current_thread_ptid_changed (ptid_t old_ptid
, ptid_t new_ptid
)
1582 struct current_thread_cleanup
*it
;
1584 for (it
= current_thread_cleanup_chain
; it
!= NULL
; it
= it
->next
)
1586 if (ptid_equal (it
->inferior_ptid
, old_ptid
))
1587 it
->inferior_ptid
= new_ptid
;
1592 do_restore_current_thread_cleanup (void *arg
)
1594 struct thread_info
*tp
;
1595 struct current_thread_cleanup
*old
= (struct current_thread_cleanup
*) arg
;
1597 tp
= find_thread_ptid (old
->inferior_ptid
);
1599 /* If the previously selected thread belonged to a process that has
1600 in the mean time been deleted (due to normal exit, detach, etc.),
1601 then don't revert back to it, but instead simply drop back to no
1604 && find_inferior_ptid (tp
->ptid
) != NULL
)
1605 restore_current_thread (old
->inferior_ptid
);
1608 restore_current_thread (null_ptid
);
1609 set_current_inferior (find_inferior_id (old
->inf_id
));
1612 /* The running state of the originally selected thread may have
1613 changed, so we have to recheck it here. */
1614 if (!ptid_equal (inferior_ptid
, null_ptid
)
1616 && is_stopped (inferior_ptid
)
1617 && target_has_registers
1619 && target_has_memory
)
1620 restore_selected_frame (old
->selected_frame_id
,
1621 old
->selected_frame_level
);
1625 restore_current_thread_cleanup_dtor (void *arg
)
1627 struct current_thread_cleanup
*old
= (struct current_thread_cleanup
*) arg
;
1628 struct thread_info
*tp
;
1629 struct inferior
*inf
;
1631 current_thread_cleanup_chain
= current_thread_cleanup_chain
->next
;
1633 tp
= find_thread_ptid (old
->inferior_ptid
);
1636 inf
= find_inferior_id (old
->inf_id
);
1638 inf
->removable
= old
->was_removable
;
1642 /* Set the thread reference count. */
1645 set_thread_refcount (void *data
)
1648 struct thread_array_cleanup
*ta_cleanup
1649 = (struct thread_array_cleanup
*) data
;
1651 for (k
= 0; k
!= ta_cleanup
->count
; k
++)
1652 ta_cleanup
->tp_array
[k
]->refcount
--;
1656 make_cleanup_restore_current_thread (void)
1658 struct thread_info
*tp
;
1659 struct frame_info
*frame
;
1660 struct current_thread_cleanup
*old
= XNEW (struct current_thread_cleanup
);
1662 old
->inferior_ptid
= inferior_ptid
;
1663 old
->inf_id
= current_inferior ()->num
;
1664 old
->was_removable
= current_inferior ()->removable
;
1666 old
->next
= current_thread_cleanup_chain
;
1667 current_thread_cleanup_chain
= old
;
1669 if (!ptid_equal (inferior_ptid
, null_ptid
))
1671 old
->was_stopped
= is_stopped (inferior_ptid
);
1672 if (old
->was_stopped
1673 && target_has_registers
1675 && target_has_memory
)
1677 /* When processing internal events, there might not be a
1678 selected frame. If we naively call get_selected_frame
1679 here, then we can end up reading debuginfo for the
1680 current frame, but we don't generally need the debuginfo
1682 frame
= get_selected_frame_if_set ();
1687 old
->selected_frame_id
= get_frame_id (frame
);
1688 old
->selected_frame_level
= frame_relative_level (frame
);
1690 tp
= find_thread_ptid (inferior_ptid
);
1695 current_inferior ()->removable
= 0;
1697 return make_cleanup_dtor (do_restore_current_thread_cleanup
, old
,
1698 restore_current_thread_cleanup_dtor
);
1701 /* See gdbthread.h. */
1704 show_thread_that_caused_stop (void)
1706 return highest_thread_num
> 1;
1709 /* See gdbthread.h. */
1712 show_inferior_qualified_tids (void)
1714 return (inferior_list
->next
!= NULL
|| inferior_list
->num
!= 1);
1717 /* See gdbthread.h. */
1720 print_thread_id (struct thread_info
*thr
)
1722 char *s
= get_print_cell ();
1724 if (show_inferior_qualified_tids ())
1725 xsnprintf (s
, PRINT_CELL_SIZE
, "%d.%d", thr
->inf
->num
, thr
->per_inf_num
);
1727 xsnprintf (s
, PRINT_CELL_SIZE
, "%d", thr
->per_inf_num
);
1731 /* If non-zero tp_array_compar should sort in ascending order, otherwise in
1732 descending order. */
1734 static int tp_array_compar_ascending
;
1736 /* Sort an array for struct thread_info pointers by thread ID (first
1737 by inferior number, and then by per-inferior thread number). The
1738 order is determined by TP_ARRAY_COMPAR_ASCENDING. */
1741 tp_array_compar (const void *ap_voidp
, const void *bp_voidp
)
1743 const struct thread_info
*a
= *(const struct thread_info
* const *) ap_voidp
;
1744 const struct thread_info
*b
= *(const struct thread_info
* const *) bp_voidp
;
1746 if (a
->inf
->num
!= b
->inf
->num
)
1748 return (((a
->inf
->num
> b
->inf
->num
) - (a
->inf
->num
< b
->inf
->num
))
1749 * (tp_array_compar_ascending
? +1 : -1));
1752 return (((a
->per_inf_num
> b
->per_inf_num
)
1753 - (a
->per_inf_num
< b
->per_inf_num
))
1754 * (tp_array_compar_ascending
? +1 : -1));
1757 /* Apply a GDB command to a list of threads. List syntax is a whitespace
1758 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
1759 of two numbers seperated by a hyphen. Examples:
1761 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
1762 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
1763 thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */
1766 thread_apply_all_command (char *cmd
, int from_tty
)
1768 struct cleanup
*old_chain
;
1771 struct thread_array_cleanup ta_cleanup
;
1773 tp_array_compar_ascending
= 0;
1775 && check_for_argument (&cmd
, "-ascending", strlen ("-ascending")))
1777 cmd
= skip_spaces (cmd
);
1778 tp_array_compar_ascending
= 1;
1781 if (cmd
== NULL
|| *cmd
== '\000')
1782 error (_("Please specify a command following the thread ID list"));
1784 update_thread_list ();
1786 old_chain
= make_cleanup_restore_current_thread ();
1788 /* Save a copy of the command in case it is clobbered by
1790 saved_cmd
= xstrdup (cmd
);
1791 make_cleanup (xfree
, saved_cmd
);
1793 /* Note this includes exited threads. */
1794 tc
= thread_count ();
1797 struct thread_info
**tp_array
;
1798 struct thread_info
*tp
;
1801 /* Save a copy of the thread_list in case we execute detach
1803 tp_array
= XNEWVEC (struct thread_info
*, tc
);
1804 make_cleanup (xfree
, tp_array
);
1806 ALL_NON_EXITED_THREADS (tp
)
1812 /* Because we skipped exited threads, we may end up with fewer
1813 threads in the array than the total count of threads. */
1814 gdb_assert (i
<= tc
);
1817 qsort (tp_array
, i
, sizeof (*tp_array
), tp_array_compar
);
1819 ta_cleanup
.tp_array
= tp_array
;
1820 ta_cleanup
.count
= i
;
1821 make_cleanup (set_thread_refcount
, &ta_cleanup
);
1823 for (k
= 0; k
!= i
; k
++)
1824 if (thread_alive (tp_array
[k
]))
1826 switch_to_thread (tp_array
[k
]->ptid
);
1827 printf_filtered (_("\nThread %s (%s):\n"),
1828 print_thread_id (tp_array
[k
]),
1829 target_pid_to_str (inferior_ptid
));
1830 execute_command (cmd
, from_tty
);
1832 /* Restore exact command used previously. */
1833 strcpy (cmd
, saved_cmd
);
1837 do_cleanups (old_chain
);
1840 /* Implementation of the "thread apply" command. */
1843 thread_apply_command (char *tidlist
, int from_tty
)
1846 struct cleanup
*old_chain
;
1848 tid_range_parser parser
;
1850 if (tidlist
== NULL
|| *tidlist
== '\000')
1851 error (_("Please specify a thread ID list"));
1853 parser
.init (tidlist
, current_inferior ()->num
);
1854 while (!parser
.finished ())
1856 int inf_num
, thr_start
, thr_end
;
1858 if (!parser
.get_tid_range (&inf_num
, &thr_start
, &thr_end
))
1860 cmd
= (char *) parser
.cur_tok ();
1866 error (_("Please specify a command following the thread ID list"));
1868 if (tidlist
== cmd
|| !isalpha (cmd
[0]))
1869 invalid_thread_id_error (cmd
);
1871 /* Save a copy of the command in case it is clobbered by
1873 saved_cmd
= xstrdup (cmd
);
1874 old_chain
= make_cleanup (xfree
, saved_cmd
);
1876 make_cleanup_restore_current_thread ();
1878 parser
.init (tidlist
, current_inferior ()->num
);
1879 while (!parser
.finished () && parser
.cur_tok () < cmd
)
1881 struct thread_info
*tp
= NULL
;
1882 struct inferior
*inf
;
1883 int inf_num
, thr_num
;
1885 parser
.get_tid (&inf_num
, &thr_num
);
1886 inf
= find_inferior_id (inf_num
);
1888 tp
= find_thread_id (inf
, thr_num
);
1890 if (parser
.in_star_range ())
1894 warning (_("Unknown inferior %d"), inf_num
);
1895 parser
.skip_range ();
1899 /* No use looking for threads past the highest thread number
1900 the inferior ever had. */
1901 if (thr_num
>= inf
->highest_thread_num
)
1902 parser
.skip_range ();
1904 /* Be quiet about unknown threads numbers. */
1911 if (show_inferior_qualified_tids () || parser
.tid_is_qualified ())
1912 warning (_("Unknown thread %d.%d"), inf_num
, thr_num
);
1914 warning (_("Unknown thread %d"), thr_num
);
1918 if (!thread_alive (tp
))
1920 warning (_("Thread %s has terminated."), print_thread_id (tp
));
1924 switch_to_thread (tp
->ptid
);
1926 printf_filtered (_("\nThread %s (%s):\n"), print_thread_id (tp
),
1927 target_pid_to_str (inferior_ptid
));
1928 execute_command (cmd
, from_tty
);
1930 /* Restore exact command used previously. */
1931 strcpy (cmd
, saved_cmd
);
1934 do_cleanups (old_chain
);
1937 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1938 if prefix of arg is `apply'. */
1941 thread_command (char *tidstr
, int from_tty
)
1945 if (ptid_equal (inferior_ptid
, null_ptid
))
1946 error (_("No thread selected"));
1948 if (target_has_stack
)
1950 struct thread_info
*tp
= inferior_thread ();
1952 if (is_exited (inferior_ptid
))
1953 printf_filtered (_("[Current thread is %s (%s) (exited)]\n"),
1954 print_thread_id (tp
),
1955 target_pid_to_str (inferior_ptid
));
1957 printf_filtered (_("[Current thread is %s (%s)]\n"),
1958 print_thread_id (tp
),
1959 target_pid_to_str (inferior_ptid
));
1962 error (_("No stack."));
1966 ptid_t previous_ptid
= inferior_ptid
;
1969 result
= gdb_thread_select (current_uiout
, tidstr
, NULL
);
1971 /* If thread switch did not succeed don't notify or print. */
1972 if (result
== GDB_RC_FAIL
)
1975 /* Print if the thread has not changed, otherwise an event will be sent. */
1976 if (ptid_equal (inferior_ptid
, previous_ptid
))
1978 print_selected_thread_frame (current_uiout
,
1979 USER_SELECTED_THREAD
1980 | USER_SELECTED_FRAME
);
1984 observer_notify_user_selected_context_changed (USER_SELECTED_THREAD
1985 | USER_SELECTED_FRAME
);
1990 /* Implementation of `thread name'. */
1993 thread_name_command (char *arg
, int from_tty
)
1995 struct thread_info
*info
;
1997 if (ptid_equal (inferior_ptid
, null_ptid
))
1998 error (_("No thread selected"));
2000 arg
= skip_spaces (arg
);
2002 info
= inferior_thread ();
2004 info
->name
= arg
? xstrdup (arg
) : NULL
;
2007 /* Find thread ids with a name, target pid, or extra info matching ARG. */
2010 thread_find_command (char *arg
, int from_tty
)
2012 struct thread_info
*tp
;
2014 unsigned long match
= 0;
2016 if (arg
== NULL
|| *arg
== '\0')
2017 error (_("Command requires an argument."));
2019 tmp
= re_comp (arg
);
2021 error (_("Invalid regexp (%s): %s"), tmp
, arg
);
2023 update_thread_list ();
2024 for (tp
= thread_list
; tp
; tp
= tp
->next
)
2026 if (tp
->name
!= NULL
&& re_exec (tp
->name
))
2028 printf_filtered (_("Thread %s has name '%s'\n"),
2029 print_thread_id (tp
), tp
->name
);
2033 tmp
= target_thread_name (tp
);
2034 if (tmp
!= NULL
&& re_exec (tmp
))
2036 printf_filtered (_("Thread %s has target name '%s'\n"),
2037 print_thread_id (tp
), tmp
);
2041 tmp
= target_pid_to_str (tp
->ptid
);
2042 if (tmp
!= NULL
&& re_exec (tmp
))
2044 printf_filtered (_("Thread %s has target id '%s'\n"),
2045 print_thread_id (tp
), tmp
);
2049 tmp
= target_extra_thread_info (tp
);
2050 if (tmp
!= NULL
&& re_exec (tmp
))
2052 printf_filtered (_("Thread %s has extra info '%s'\n"),
2053 print_thread_id (tp
), tmp
);
2058 printf_filtered (_("No threads match '%s'\n"), arg
);
2061 /* Print notices when new threads are attached and detached. */
2062 int print_thread_events
= 1;
2064 show_print_thread_events (struct ui_file
*file
, int from_tty
,
2065 struct cmd_list_element
*c
, const char *value
)
2067 fprintf_filtered (file
,
2068 _("Printing of thread events is %s.\n"),
2073 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr_v
)
2075 const char *tidstr
= (const char *) tidstr_v
;
2076 struct thread_info
*tp
;
2078 if (uiout
->is_mi_like_p ())
2080 int num
= value_as_long (parse_and_eval (tidstr
));
2082 tp
= find_thread_global_id (num
);
2084 error (_("Thread ID %d not known."), num
);
2088 tp
= parse_thread_id (tidstr
, NULL
);
2089 gdb_assert (tp
!= NULL
);
2092 if (!thread_alive (tp
))
2093 error (_("Thread ID %s has terminated."), tidstr
);
2095 switch_to_thread (tp
->ptid
);
2097 annotate_thread_changed ();
2099 /* Since the current thread may have changed, see if there is any
2100 exited thread we can now delete. */
2106 /* Print thread and frame switch command response. */
2109 print_selected_thread_frame (struct ui_out
*uiout
,
2110 user_selected_what selection
)
2112 struct thread_info
*tp
= inferior_thread ();
2113 struct inferior
*inf
= current_inferior ();
2115 if (selection
& USER_SELECTED_THREAD
)
2117 if (uiout
->is_mi_like_p ())
2119 uiout
->field_int ("new-thread-id",
2120 inferior_thread ()->global_num
);
2124 uiout
->text ("[Switching to thread ");
2125 uiout
->field_string ("new-thread-id", print_thread_id (tp
));
2127 uiout
->text (target_pid_to_str (inferior_ptid
));
2132 if (tp
->state
== THREAD_RUNNING
)
2134 if (selection
& USER_SELECTED_THREAD
)
2135 uiout
->text ("(running)\n");
2137 else if (selection
& USER_SELECTED_FRAME
)
2139 if (selection
& USER_SELECTED_THREAD
)
2142 if (has_stack_frames ())
2143 print_stack_frame_to_uiout (uiout
, get_selected_frame (NULL
),
2149 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
2151 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
2152 error_message
, RETURN_MASK_ALL
) < 0)
2157 /* Update the 'threads_executing' global based on the threads we know
2161 update_threads_executing (void)
2163 struct thread_info
*tp
;
2165 threads_executing
= 0;
2166 ALL_NON_EXITED_THREADS (tp
)
2170 threads_executing
= 1;
2177 update_thread_list (void)
2179 target_update_thread_list ();
2180 update_threads_executing ();
2183 /* Return a new value for the selected thread's id. Return a value of
2184 0 if no thread is selected. If GLOBAL is true, return the thread's
2185 global number. Otherwise return the per-inferior number. */
2187 static struct value
*
2188 thread_num_make_value_helper (struct gdbarch
*gdbarch
, int global
)
2190 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
2196 int_val
= tp
->global_num
;
2198 int_val
= tp
->per_inf_num
;
2200 return value_from_longest (builtin_type (gdbarch
)->builtin_int
, int_val
);
2203 /* Return a new value for the selected thread's per-inferior thread
2204 number. Return a value of 0 if no thread is selected, or no
2207 static struct value
*
2208 thread_id_per_inf_num_make_value (struct gdbarch
*gdbarch
, struct internalvar
*var
,
2211 return thread_num_make_value_helper (gdbarch
, 0);
2214 /* Return a new value for the selected thread's global id. Return a
2215 value of 0 if no thread is selected, or no threads exist. */
2217 static struct value
*
2218 global_thread_id_make_value (struct gdbarch
*gdbarch
, struct internalvar
*var
,
2221 return thread_num_make_value_helper (gdbarch
, 1);
2224 /* Commands with a prefix of `thread'. */
2225 struct cmd_list_element
*thread_cmd_list
= NULL
;
2227 /* Implementation of `thread' variable. */
2229 static const struct internalvar_funcs thread_funcs
=
2231 thread_id_per_inf_num_make_value
,
2236 /* Implementation of `gthread' variable. */
2238 static const struct internalvar_funcs gthread_funcs
=
2240 global_thread_id_make_value
,
2246 _initialize_thread (void)
2248 static struct cmd_list_element
*thread_apply_list
= NULL
;
2250 add_info ("threads", info_threads_command
,
2251 _("Display currently known threads.\n\
2252 Usage: info threads [-gid] [ID]...\n\
2253 -gid: Show global thread IDs.\n\
2254 If ID is given, it is a space-separated list of IDs of threads to display.\n\
2255 Otherwise, all threads are displayed."));
2257 add_prefix_cmd ("thread", class_run
, thread_command
, _("\
2258 Use this command to switch between threads.\n\
2259 The new thread ID must be currently known."),
2260 &thread_cmd_list
, "thread ", 1, &cmdlist
);
2262 add_prefix_cmd ("apply", class_run
, thread_apply_command
,
2263 _("Apply a command to a list of threads."),
2264 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
2266 add_cmd ("all", class_run
, thread_apply_all_command
,
2268 Apply a command to all threads.\n\
2270 Usage: thread apply all [-ascending] <command>\n\
2271 -ascending: Call <command> for all threads in ascending order.\n\
2272 The default is descending order.\
2274 &thread_apply_list
);
2276 add_cmd ("name", class_run
, thread_name_command
,
2277 _("Set the current thread's name.\n\
2278 Usage: thread name [NAME]\n\
2279 If NAME is not given, then any existing name is removed."), &thread_cmd_list
);
2281 add_cmd ("find", class_run
, thread_find_command
, _("\
2282 Find threads that match a regular expression.\n\
2283 Usage: thread find REGEXP\n\
2284 Will display thread ids whose name, target ID, or extra info matches REGEXP."),
2287 add_com_alias ("t", "thread", class_run
, 1);
2289 add_setshow_boolean_cmd ("thread-events", no_class
,
2290 &print_thread_events
, _("\
2291 Set printing of thread events (such as thread start and exit)."), _("\
2292 Show printing of thread events (such as thread start and exit)."), NULL
,
2294 show_print_thread_events
,
2295 &setprintlist
, &showprintlist
);
2297 create_internalvar_type_lazy ("_thread", &thread_funcs
, NULL
);
2298 create_internalvar_type_lazy ("_gthread", >hread_funcs
, NULL
);
2300 observer_attach_thread_ptid_changed (restore_current_thread_ptid_changed
);