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"
49 /* Definition of struct thread_info exported to gdbthread.h. */
51 /* Prototypes for local functions. */
53 struct thread_info
*thread_list
= NULL
;
54 static int highest_thread_num
;
56 /* True if any thread is, or may be executing. We need to track this
57 separately because until we fully sync the thread list, we won't
58 know whether the target is fully stopped, even if we see stop
59 events for all known threads, because any of those threads may have
60 spawned new threads we haven't heard of yet. */
61 static int threads_executing
;
63 static void thread_apply_all_command (char *, int);
64 static int thread_alive (struct thread_info
*);
65 static void info_threads_command (char *, int);
66 static void thread_apply_command (char *, int);
68 /* RAII type used to increase / decrease the refcount of each thread
69 in a given list of threads. */
71 class scoped_inc_dec_ref
74 explicit scoped_inc_dec_ref (const std::vector
<thread_info
*> &thrds
)
77 for (thread_info
*thr
: m_thrds
)
81 ~scoped_inc_dec_ref ()
83 for (thread_info
*thr
: m_thrds
)
88 const std::vector
<thread_info
*> &m_thrds
;
93 inferior_thread (void)
95 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
100 /* Delete the breakpoint pointed at by BP_P, if there's one. */
103 delete_thread_breakpoint (struct breakpoint
**bp_p
)
107 delete_breakpoint (*bp_p
);
113 delete_step_resume_breakpoint (struct thread_info
*tp
)
116 delete_thread_breakpoint (&tp
->control
.step_resume_breakpoint
);
120 delete_exception_resume_breakpoint (struct thread_info
*tp
)
123 delete_thread_breakpoint (&tp
->control
.exception_resume_breakpoint
);
126 /* See gdbthread.h. */
129 delete_single_step_breakpoints (struct thread_info
*tp
)
132 delete_thread_breakpoint (&tp
->control
.single_step_breakpoints
);
135 /* Delete the breakpoint pointed at by BP_P at the next stop, if
139 delete_at_next_stop (struct breakpoint
**bp
)
143 (*bp
)->disposition
= disp_del_at_next_stop
;
148 /* See gdbthread.h. */
151 thread_has_single_step_breakpoints_set (struct thread_info
*tp
)
153 return tp
->control
.single_step_breakpoints
!= NULL
;
156 /* See gdbthread.h. */
159 thread_has_single_step_breakpoint_here (struct thread_info
*tp
,
160 struct address_space
*aspace
,
163 struct breakpoint
*ss_bps
= tp
->control
.single_step_breakpoints
;
165 return (ss_bps
!= NULL
166 && breakpoint_has_location_inserted_here (ss_bps
, aspace
, addr
));
169 /* See gdbthread.h. */
172 thread_cancel_execution_command (struct thread_info
*thr
)
174 if (thr
->thread_fsm
!= NULL
)
176 thread_fsm_clean_up (thr
->thread_fsm
, thr
);
177 thread_fsm_delete (thr
->thread_fsm
);
178 thr
->thread_fsm
= NULL
;
183 clear_thread_inferior_resources (struct thread_info
*tp
)
185 /* NOTE: this will take care of any left-over step_resume breakpoints,
186 but not any user-specified thread-specific breakpoints. We can not
187 delete the breakpoint straight-off, because the inferior might not
188 be stopped at the moment. */
189 delete_at_next_stop (&tp
->control
.step_resume_breakpoint
);
190 delete_at_next_stop (&tp
->control
.exception_resume_breakpoint
);
191 delete_at_next_stop (&tp
->control
.single_step_breakpoints
);
193 delete_longjmp_breakpoint_at_next_stop (tp
->global_num
);
195 bpstat_clear (&tp
->control
.stop_bpstat
);
197 btrace_teardown (tp
);
199 thread_cancel_execution_command (tp
);
202 /* Set the TP's state as exited. */
205 set_thread_exited (thread_info
*tp
, int silent
)
207 /* Dead threads don't need to step-over. Remove from queue. */
208 if (tp
->step_over_next
!= NULL
)
209 thread_step_over_chain_remove (tp
);
211 if (tp
->state
!= THREAD_EXITED
)
213 observer_notify_thread_exit (tp
, silent
);
215 /* Tag it as exited. */
216 tp
->state
= THREAD_EXITED
;
218 /* Clear breakpoints, etc. associated with this thread. */
219 clear_thread_inferior_resources (tp
);
224 init_thread_list (void)
226 struct thread_info
*tp
, *tpnext
;
228 highest_thread_num
= 0;
233 for (tp
= thread_list
; tp
; tp
= tpnext
)
236 if (tp
->deletable ())
239 set_thread_exited (tp
, 1);
243 threads_executing
= 0;
246 /* Allocate a new thread of inferior INF with target id PTID and add
247 it to the thread list. */
249 static struct thread_info
*
250 new_thread (struct inferior
*inf
, ptid_t ptid
)
252 thread_info
*tp
= new thread_info (inf
, ptid
);
254 if (thread_list
== NULL
)
258 struct thread_info
*last
;
260 for (last
= thread_list
; last
->next
!= NULL
; last
= last
->next
)
269 add_thread_silent (ptid_t ptid
)
271 struct thread_info
*tp
;
272 struct inferior
*inf
= find_inferior_ptid (ptid
);
273 gdb_assert (inf
!= NULL
);
275 tp
= find_thread_ptid (ptid
);
277 /* Found an old thread with the same id. It has to be dead,
278 otherwise we wouldn't be adding a new thread with the same id.
279 The OS is reusing this id --- delete it, and recreate a new
282 /* In addition to deleting the thread, if this is the current
283 thread, then we need to take care that delete_thread doesn't
284 really delete the thread if it is inferior_ptid. Create a
285 new template thread in the list with an invalid ptid, switch
286 to it, delete the original thread, reset the new thread's
287 ptid, and switch to it. */
289 if (inferior_ptid
== ptid
)
291 tp
= new_thread (inf
, null_ptid
);
293 /* Make switch_to_thread not read from the thread. */
294 tp
->state
= THREAD_EXITED
;
295 switch_to_thread (null_ptid
);
297 /* Now we can delete it. */
298 delete_thread (ptid
);
300 /* Now reset its ptid, and reswitch inferior_ptid to it. */
302 tp
->state
= THREAD_STOPPED
;
303 switch_to_thread (ptid
);
305 observer_notify_new_thread (tp
);
311 /* Just go ahead and delete it. */
312 delete_thread (ptid
);
315 tp
= new_thread (inf
, ptid
);
316 observer_notify_new_thread (tp
);
322 add_thread_with_info (ptid_t ptid
, struct private_thread_info
*priv
)
324 struct thread_info
*result
= add_thread_silent (ptid
);
328 if (print_thread_events
)
329 printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid
));
331 annotate_new_thread ();
336 add_thread (ptid_t ptid
)
338 return add_thread_with_info (ptid
, NULL
);
341 thread_info::thread_info (struct inferior
*inf_
, ptid_t ptid_
)
342 : ptid (ptid_
), inf (inf_
)
344 gdb_assert (inf_
!= NULL
);
346 this->global_num
= ++highest_thread_num
;
347 this->per_inf_num
= ++inf_
->highest_thread_num
;
349 /* Nothing to follow yet. */
350 memset (&this->pending_follow
, 0, sizeof (this->pending_follow
));
351 this->pending_follow
.kind
= TARGET_WAITKIND_SPURIOUS
;
352 this->suspend
.waitstatus
.kind
= TARGET_WAITKIND_IGNORE
;
355 thread_info::~thread_info ()
359 if (this->private_dtor
)
360 this->private_dtor (this->priv
);
368 /* Add TP to the end of the step-over chain LIST_P. */
371 step_over_chain_enqueue (struct thread_info
**list_p
, struct thread_info
*tp
)
373 gdb_assert (tp
->step_over_next
== NULL
);
374 gdb_assert (tp
->step_over_prev
== NULL
);
379 tp
->step_over_prev
= tp
->step_over_next
= tp
;
383 struct thread_info
*head
= *list_p
;
384 struct thread_info
*tail
= head
->step_over_prev
;
386 tp
->step_over_prev
= tail
;
387 tp
->step_over_next
= head
;
388 head
->step_over_prev
= tp
;
389 tail
->step_over_next
= tp
;
393 /* Remove TP from step-over chain LIST_P. */
396 step_over_chain_remove (struct thread_info
**list_p
, struct thread_info
*tp
)
398 gdb_assert (tp
->step_over_next
!= NULL
);
399 gdb_assert (tp
->step_over_prev
!= NULL
);
403 if (tp
== tp
->step_over_next
)
406 *list_p
= tp
->step_over_next
;
409 tp
->step_over_prev
->step_over_next
= tp
->step_over_next
;
410 tp
->step_over_next
->step_over_prev
= tp
->step_over_prev
;
411 tp
->step_over_prev
= tp
->step_over_next
= NULL
;
414 /* See gdbthread.h. */
417 thread_step_over_chain_next (struct thread_info
*tp
)
419 struct thread_info
*next
= tp
->step_over_next
;
421 return (next
== step_over_queue_head
? NULL
: next
);
424 /* See gdbthread.h. */
427 thread_is_in_step_over_chain (struct thread_info
*tp
)
429 return (tp
->step_over_next
!= NULL
);
432 /* See gdbthread.h. */
435 thread_step_over_chain_enqueue (struct thread_info
*tp
)
437 step_over_chain_enqueue (&step_over_queue_head
, tp
);
440 /* See gdbthread.h. */
443 thread_step_over_chain_remove (struct thread_info
*tp
)
445 step_over_chain_remove (&step_over_queue_head
, tp
);
448 /* Delete thread PTID. If SILENT, don't notify the observer of this
451 delete_thread_1 (ptid_t ptid
, int silent
)
453 struct thread_info
*tp
, *tpprev
;
457 for (tp
= thread_list
; tp
; tpprev
= tp
, tp
= tp
->next
)
458 if (tp
->ptid
== ptid
)
464 set_thread_exited (tp
, silent
);
466 if (!tp
->deletable ())
468 /* Will be really deleted some other time. */
473 tpprev
->next
= tp
->next
;
475 thread_list
= tp
->next
;
480 /* Delete thread PTID and notify of thread exit. If this is
481 inferior_ptid, don't actually delete it, but tag it as exited and
482 do the notification. If PTID is the user selected thread, clear
485 delete_thread (ptid_t ptid
)
487 delete_thread_1 (ptid
, 0 /* not silent */);
491 delete_thread_silent (ptid_t ptid
)
493 delete_thread_1 (ptid
, 1 /* silent */);
497 find_thread_global_id (int global_id
)
499 struct thread_info
*tp
;
501 for (tp
= thread_list
; tp
; tp
= tp
->next
)
502 if (tp
->global_num
== global_id
)
508 static struct thread_info
*
509 find_thread_id (struct inferior
*inf
, int thr_num
)
511 struct thread_info
*tp
;
513 for (tp
= thread_list
; tp
; tp
= tp
->next
)
514 if (tp
->inf
== inf
&& tp
->per_inf_num
== thr_num
)
520 /* Find a thread_info by matching PTID. */
522 find_thread_ptid (ptid_t ptid
)
524 struct thread_info
*tp
;
526 for (tp
= thread_list
; tp
; tp
= tp
->next
)
527 if (tp
->ptid
== ptid
)
534 * Thread iterator function.
536 * Calls a callback function once for each thread, so long as
537 * the callback function returns false. If the callback function
538 * returns true, the iteration will end and the current thread
539 * will be returned. This can be useful for implementing a
540 * search for a thread with arbitrary attributes, or for applying
541 * some operation to every thread.
543 * FIXME: some of the existing functionality, such as
544 * "Thread apply all", might be rewritten using this functionality.
548 iterate_over_threads (int (*callback
) (struct thread_info
*, void *),
551 struct thread_info
*tp
, *next
;
553 for (tp
= thread_list
; tp
; tp
= next
)
556 if ((*callback
) (tp
, data
))
567 struct thread_info
*tp
;
569 for (tp
= thread_list
; tp
; tp
= tp
->next
)
575 /* Return the number of non-exited threads in the thread list. */
578 live_threads_count (void)
581 struct thread_info
*tp
;
583 ALL_NON_EXITED_THREADS (tp
)
590 valid_global_thread_id (int global_id
)
592 struct thread_info
*tp
;
594 for (tp
= thread_list
; tp
; tp
= tp
->next
)
595 if (tp
->global_num
== global_id
)
602 ptid_to_global_thread_id (ptid_t ptid
)
604 struct thread_info
*tp
;
606 for (tp
= thread_list
; tp
; tp
= tp
->next
)
607 if (tp
->ptid
== ptid
)
608 return tp
->global_num
;
614 global_thread_id_to_ptid (int global_id
)
616 struct thread_info
*thread
= find_thread_global_id (global_id
);
621 return minus_one_ptid
;
625 in_thread_list (ptid_t ptid
)
627 struct thread_info
*tp
;
629 for (tp
= thread_list
; tp
; tp
= tp
->next
)
630 if (tp
->ptid
== ptid
)
633 return 0; /* Never heard of 'im. */
636 /* Finds the first thread of the inferior given by PID. If PID is -1,
637 return the first thread in the list. */
640 first_thread_of_process (int pid
)
642 struct thread_info
*tp
, *ret
= NULL
;
644 for (tp
= thread_list
; tp
; tp
= tp
->next
)
645 if (pid
== -1 || ptid_get_pid (tp
->ptid
) == pid
)
646 if (ret
== NULL
|| tp
->global_num
< ret
->global_num
)
653 any_thread_of_process (int pid
)
655 struct thread_info
*tp
;
657 gdb_assert (pid
!= 0);
659 /* Prefer the current thread. */
660 if (ptid_get_pid (inferior_ptid
) == pid
)
661 return inferior_thread ();
663 ALL_NON_EXITED_THREADS (tp
)
664 if (ptid_get_pid (tp
->ptid
) == pid
)
671 any_live_thread_of_process (int pid
)
673 struct thread_info
*curr_tp
= NULL
;
674 struct thread_info
*tp
;
675 struct thread_info
*tp_executing
= NULL
;
677 gdb_assert (pid
!= 0);
679 /* Prefer the current thread if it's not executing. */
680 if (ptid_get_pid (inferior_ptid
) == pid
)
682 /* If the current thread is dead, forget it. If it's not
683 executing, use it. Otherwise, still choose it (below), but
684 only if no other non-executing thread is found. */
685 curr_tp
= inferior_thread ();
686 if (curr_tp
->state
== THREAD_EXITED
)
688 else if (!curr_tp
->executing
)
692 ALL_NON_EXITED_THREADS (tp
)
693 if (ptid_get_pid (tp
->ptid
) == pid
)
701 /* If both the current thread and all live threads are executing,
702 prefer the current thread. */
706 /* Otherwise, just return an executing thread, if any. */
710 /* Print a list of thread ids currently known, and the total number of
711 threads. To be used from within catch_errors. */
713 do_captured_list_thread_ids (struct ui_out
*uiout
, void *arg
)
715 struct thread_info
*tp
;
717 int current_thread
= -1;
719 update_thread_list ();
722 ui_out_emit_tuple
tuple_emitter (uiout
, "thread-ids");
724 for (tp
= thread_list
; tp
; tp
= tp
->next
)
726 if (tp
->state
== THREAD_EXITED
)
729 if (tp
->ptid
== inferior_ptid
)
730 current_thread
= tp
->global_num
;
733 uiout
->field_int ("thread-id", tp
->global_num
);
737 if (current_thread
!= -1)
738 uiout
->field_int ("current-thread-id", current_thread
);
739 uiout
->field_int ("number-of-threads", num
);
743 /* Official gdblib interface function to get a list of thread ids and
746 gdb_list_thread_ids (struct ui_out
*uiout
, char **error_message
)
748 if (catch_exceptions_with_msg (uiout
, do_captured_list_thread_ids
, NULL
,
749 error_message
, RETURN_MASK_ALL
) < 0)
754 /* Return true if TP is an active thread. */
756 thread_alive (struct thread_info
*tp
)
758 if (tp
->state
== THREAD_EXITED
)
760 if (!target_thread_alive (tp
->ptid
))
765 /* See gdbthreads.h. */
770 struct thread_info
*tp
, *tmp
;
772 ALL_THREADS_SAFE (tp
, tmp
)
774 if (!thread_alive (tp
))
775 delete_thread (tp
->ptid
);
779 /* See gdbthreads.h. */
782 delete_exited_threads (void)
784 struct thread_info
*tp
, *tmp
;
786 ALL_THREADS_SAFE (tp
, tmp
)
788 if (tp
->state
== THREAD_EXITED
)
789 delete_thread (tp
->ptid
);
793 /* Disable storing stack temporaries for the thread whose id is
797 disable_thread_stack_temporaries (void *data
)
799 ptid_t
*pd
= (ptid_t
*) data
;
800 struct thread_info
*tp
= find_thread_ptid (*pd
);
804 tp
->stack_temporaries_enabled
= 0;
805 VEC_free (value_ptr
, tp
->stack_temporaries
);
811 /* Enable storing stack temporaries for thread with id PTID and return a
812 cleanup which can disable and clear the stack temporaries. */
815 enable_thread_stack_temporaries (ptid_t ptid
)
817 struct thread_info
*tp
= find_thread_ptid (ptid
);
821 gdb_assert (tp
!= NULL
);
823 tp
->stack_temporaries_enabled
= 1;
824 tp
->stack_temporaries
= NULL
;
825 data
= XNEW (ptid_t
);
827 c
= make_cleanup (disable_thread_stack_temporaries
, data
);
832 /* Return non-zero value if stack temporaies are enabled for the thread
836 thread_stack_temporaries_enabled_p (ptid_t ptid
)
838 struct thread_info
*tp
= find_thread_ptid (ptid
);
843 return tp
->stack_temporaries_enabled
;
846 /* Push V on to the stack temporaries of the thread with id PTID. */
849 push_thread_stack_temporary (ptid_t ptid
, struct value
*v
)
851 struct thread_info
*tp
= find_thread_ptid (ptid
);
853 gdb_assert (tp
!= NULL
&& tp
->stack_temporaries_enabled
);
854 VEC_safe_push (value_ptr
, tp
->stack_temporaries
, v
);
857 /* Return 1 if VAL is among the stack temporaries of the thread
858 with id PTID. Return 0 otherwise. */
861 value_in_thread_stack_temporaries (struct value
*val
, ptid_t ptid
)
863 struct thread_info
*tp
= find_thread_ptid (ptid
);
865 gdb_assert (tp
!= NULL
&& tp
->stack_temporaries_enabled
);
866 if (!VEC_empty (value_ptr
, tp
->stack_temporaries
))
871 for (i
= 0; VEC_iterate (value_ptr
, tp
->stack_temporaries
, i
, v
); i
++)
879 /* Return the last of the stack temporaries for thread with id PTID.
880 Return NULL if there are no stack temporaries for the thread. */
883 get_last_thread_stack_temporary (ptid_t ptid
)
885 struct value
*lastval
= NULL
;
886 struct thread_info
*tp
= find_thread_ptid (ptid
);
888 gdb_assert (tp
!= NULL
);
889 if (!VEC_empty (value_ptr
, tp
->stack_temporaries
))
890 lastval
= VEC_last (value_ptr
, tp
->stack_temporaries
);
896 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
898 struct inferior
*inf
;
899 struct thread_info
*tp
;
901 /* It can happen that what we knew as the target inferior id
902 changes. E.g, target remote may only discover the remote process
903 pid after adding the inferior to GDB's list. */
904 inf
= find_inferior_ptid (old_ptid
);
905 inf
->pid
= ptid_get_pid (new_ptid
);
907 tp
= find_thread_ptid (old_ptid
);
910 observer_notify_thread_ptid_changed (old_ptid
, new_ptid
);
913 /* See gdbthread.h. */
916 set_resumed (ptid_t ptid
, int resumed
)
918 struct thread_info
*tp
;
919 int all
= ptid
== minus_one_ptid
;
921 if (all
|| ptid_is_pid (ptid
))
923 for (tp
= thread_list
; tp
; tp
= tp
->next
)
924 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
925 tp
->resumed
= resumed
;
929 tp
= find_thread_ptid (ptid
);
930 gdb_assert (tp
!= NULL
);
931 tp
->resumed
= resumed
;
935 /* Helper for set_running, that marks one thread either running or
939 set_running_thread (struct thread_info
*tp
, int running
)
943 if (running
&& tp
->state
== THREAD_STOPPED
)
945 tp
->state
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
949 /* If the thread is now marked stopped, remove it from
950 the step-over queue, so that we don't try to resume
951 it until the user wants it to. */
952 if (tp
->step_over_next
!= NULL
)
953 thread_step_over_chain_remove (tp
);
960 set_running (ptid_t ptid
, int running
)
962 struct thread_info
*tp
;
963 int all
= ptid
== minus_one_ptid
;
966 /* We try not to notify the observer if no thread has actually changed
967 the running state -- merely to reduce the number of messages to
968 frontend. Frontend is supposed to handle multiple *running just fine. */
969 if (all
|| ptid_is_pid (ptid
))
971 for (tp
= thread_list
; tp
; tp
= tp
->next
)
972 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
974 if (tp
->state
== THREAD_EXITED
)
977 if (set_running_thread (tp
, running
))
983 tp
= find_thread_ptid (ptid
);
984 gdb_assert (tp
!= NULL
);
985 gdb_assert (tp
->state
!= THREAD_EXITED
);
986 if (set_running_thread (tp
, running
))
990 observer_notify_target_resumed (ptid
);
994 is_thread_state (ptid_t ptid
, enum thread_state state
)
996 struct thread_info
*tp
;
998 tp
= find_thread_ptid (ptid
);
1000 return tp
->state
== state
;
1004 is_stopped (ptid_t ptid
)
1006 return is_thread_state (ptid
, THREAD_STOPPED
);
1010 is_exited (ptid_t ptid
)
1012 return is_thread_state (ptid
, THREAD_EXITED
);
1016 is_running (ptid_t ptid
)
1018 return is_thread_state (ptid
, THREAD_RUNNING
);
1022 is_executing (ptid_t ptid
)
1024 struct thread_info
*tp
;
1026 tp
= find_thread_ptid (ptid
);
1028 return tp
->executing
;
1032 set_executing (ptid_t ptid
, int executing
)
1034 struct thread_info
*tp
;
1035 int all
= ptid
== minus_one_ptid
;
1037 if (all
|| ptid_is_pid (ptid
))
1039 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1040 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
1041 tp
->executing
= executing
;
1045 tp
= find_thread_ptid (ptid
);
1047 tp
->executing
= executing
;
1050 /* It only takes one running thread to spawn more threads.*/
1052 threads_executing
= 1;
1053 /* Only clear the flag if the caller is telling us everything is
1055 else if (minus_one_ptid
== ptid
)
1056 threads_executing
= 0;
1059 /* See gdbthread.h. */
1062 threads_are_executing (void)
1064 return threads_executing
;
1068 set_stop_requested (ptid_t ptid
, int stop
)
1070 struct thread_info
*tp
;
1071 int all
= ptid
== minus_one_ptid
;
1073 if (all
|| ptid_is_pid (ptid
))
1075 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1076 if (all
|| ptid_get_pid (tp
->ptid
) == ptid_get_pid (ptid
))
1077 tp
->stop_requested
= stop
;
1081 tp
= find_thread_ptid (ptid
);
1083 tp
->stop_requested
= stop
;
1086 /* Call the stop requested observer so other components of GDB can
1087 react to this request. */
1089 observer_notify_thread_stop_requested (ptid
);
1093 finish_thread_state (ptid_t ptid
)
1095 struct thread_info
*tp
;
1097 int any_started
= 0;
1099 all
= ptid
== minus_one_ptid
;
1101 if (all
|| ptid_is_pid (ptid
))
1103 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1105 if (tp
->state
== THREAD_EXITED
)
1107 if (all
|| ptid_get_pid (ptid
) == ptid_get_pid (tp
->ptid
))
1109 if (set_running_thread (tp
, tp
->executing
))
1116 tp
= find_thread_ptid (ptid
);
1118 if (tp
->state
!= THREAD_EXITED
)
1120 if (set_running_thread (tp
, tp
->executing
))
1126 observer_notify_target_resumed (ptid
);
1130 finish_thread_state_cleanup (void *arg
)
1132 ptid_t
*ptid_p
= (ptid_t
*) arg
;
1136 finish_thread_state (*ptid_p
);
1139 /* See gdbthread.h. */
1142 validate_registers_access (void)
1144 /* No selected thread, no registers. */
1145 if (inferior_ptid
== null_ptid
)
1146 error (_("No thread selected."));
1148 /* Don't try to read from a dead thread. */
1149 if (is_exited (inferior_ptid
))
1150 error (_("The current thread has terminated"));
1152 /* ... or from a spinning thread. FIXME: This isn't actually fully
1153 correct. It'll allow an user-requested access (e.g., "print $pc"
1154 at the prompt) when a thread is not executing for some internal
1155 reason, but is marked running from the user's perspective. E.g.,
1156 the thread is waiting for its turn in the step-over queue. */
1157 if (is_executing (inferior_ptid
))
1158 error (_("Selected thread is running."));
1161 /* See gdbthread.h. */
1164 can_access_registers_ptid (ptid_t ptid
)
1166 /* No thread, no registers. */
1167 if (ptid
== null_ptid
)
1170 /* Don't try to read from a dead thread. */
1171 if (is_exited (ptid
))
1174 /* ... or from a spinning thread. FIXME: see validate_registers_access. */
1175 if (is_executing (ptid
))
1182 pc_in_thread_step_range (CORE_ADDR pc
, struct thread_info
*thread
)
1184 return (pc
>= thread
->control
.step_range_start
1185 && pc
< thread
->control
.step_range_end
);
1188 /* Helper for print_thread_info. Returns true if THR should be
1189 printed. If REQUESTED_THREADS, a list of GDB ids/ranges, is not
1190 NULL, only print THR if its ID is included in the list. GLOBAL_IDS
1191 is true if REQUESTED_THREADS is list of global IDs, false if a list
1192 of per-inferior thread ids. If PID is not -1, only print THR if it
1193 is a thread from the process PID. Otherwise, threads from all
1194 attached PIDs are printed. If both REQUESTED_THREADS is not NULL
1195 and PID is not -1, then the thread is printed if it belongs to the
1196 specified process. Otherwise, an error is raised. */
1199 should_print_thread (const char *requested_threads
, int default_inf_num
,
1200 int global_ids
, int pid
, struct thread_info
*thr
)
1202 if (requested_threads
!= NULL
&& *requested_threads
!= '\0')
1207 in_list
= number_is_in_list (requested_threads
, thr
->global_num
);
1209 in_list
= tid_is_in_list (requested_threads
, default_inf_num
,
1210 thr
->inf
->num
, thr
->per_inf_num
);
1215 if (pid
!= -1 && ptid_get_pid (thr
->ptid
) != pid
)
1217 if (requested_threads
!= NULL
&& *requested_threads
!= '\0')
1218 error (_("Requested thread not found in requested process"));
1222 if (thr
->state
== THREAD_EXITED
)
1228 /* Like print_thread_info, but in addition, GLOBAL_IDS indicates
1229 whether REQUESTED_THREADS is a list of global or per-inferior
1233 print_thread_info_1 (struct ui_out
*uiout
, char *requested_threads
,
1234 int global_ids
, int pid
,
1235 int show_global_ids
)
1237 struct thread_info
*tp
;
1238 ptid_t current_ptid
;
1239 const char *extra_info
, *name
, *target_id
;
1240 struct inferior
*inf
;
1241 int default_inf_num
= current_inferior ()->num
;
1243 update_thread_list ();
1244 current_ptid
= inferior_ptid
;
1246 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
1248 /* For backward compatibility, we make a list for MI. A table is
1249 preferable for the CLI, though, because it shows table
1251 if (uiout
->is_mi_like_p ())
1252 make_cleanup_ui_out_list_begin_end (uiout
, "threads");
1257 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1259 if (!should_print_thread (requested_threads
, default_inf_num
,
1260 global_ids
, pid
, tp
))
1268 if (requested_threads
== NULL
|| *requested_threads
== '\0')
1269 uiout
->message (_("No threads.\n"));
1271 uiout
->message (_("No threads match '%s'.\n"),
1273 do_cleanups (old_chain
);
1277 if (show_global_ids
|| uiout
->is_mi_like_p ())
1278 make_cleanup_ui_out_table_begin_end (uiout
, 5, n_threads
, "threads");
1280 make_cleanup_ui_out_table_begin_end (uiout
, 4, n_threads
, "threads");
1282 uiout
->table_header (1, ui_left
, "current", "");
1284 if (!uiout
->is_mi_like_p ())
1285 uiout
->table_header (4, ui_left
, "id-in-tg", "Id");
1286 if (show_global_ids
|| uiout
->is_mi_like_p ())
1287 uiout
->table_header (4, ui_left
, "id", "GId");
1288 uiout
->table_header (17, ui_left
, "target-id", "Target Id");
1289 uiout
->table_header (1, ui_left
, "frame", "Frame");
1290 uiout
->table_body ();
1293 /* We'll be switching threads temporarily. */
1295 scoped_restore_current_thread restore_thread
;
1297 ALL_THREADS_BY_INFERIOR (inf
, tp
)
1301 if (!should_print_thread (requested_threads
, default_inf_num
,
1302 global_ids
, pid
, tp
))
1305 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
1307 if (!uiout
->is_mi_like_p ())
1309 if (tp
->ptid
== current_ptid
)
1310 uiout
->field_string ("current", "*");
1312 uiout
->field_skip ("current");
1315 if (!uiout
->is_mi_like_p ())
1316 uiout
->field_string ("id-in-tg", print_thread_id (tp
));
1318 if (show_global_ids
|| uiout
->is_mi_like_p ())
1319 uiout
->field_int ("id", tp
->global_num
);
1321 /* For the CLI, we stuff everything into the target-id field.
1322 This is a gross hack to make the output come out looking
1323 correct. The underlying problem here is that ui-out has no
1324 way to specify that a field's space allocation should be
1325 shared by several fields. For MI, we do the right thing
1328 target_id
= target_pid_to_str (tp
->ptid
);
1329 extra_info
= target_extra_thread_info (tp
);
1330 name
= tp
->name
? tp
->name
: target_thread_name (tp
);
1332 if (uiout
->is_mi_like_p ())
1334 uiout
->field_string ("target-id", target_id
);
1336 uiout
->field_string ("details", extra_info
);
1338 uiout
->field_string ("name", name
);
1342 std::string contents
;
1344 if (extra_info
&& name
)
1345 contents
= string_printf ("%s \"%s\" (%s)", target_id
,
1347 else if (extra_info
)
1348 contents
= string_printf ("%s (%s)", target_id
, extra_info
);
1350 contents
= string_printf ("%s \"%s\"", target_id
, name
);
1352 contents
= target_id
;
1354 uiout
->field_string ("target-id", contents
.c_str ());
1357 if (tp
->state
== THREAD_RUNNING
)
1358 uiout
->text ("(running)\n");
1361 /* The switch below puts us at the top of the stack (leaf
1363 switch_to_thread (tp
->ptid
);
1364 print_stack_frame (get_selected_frame (NULL
),
1365 /* For MI output, print frame level. */
1366 uiout
->is_mi_like_p (),
1370 if (uiout
->is_mi_like_p ())
1372 const char *state
= "stopped";
1374 if (tp
->state
== THREAD_RUNNING
)
1376 uiout
->field_string ("state", state
);
1379 core
= target_core_of_thread (tp
->ptid
);
1380 if (uiout
->is_mi_like_p () && core
!= -1)
1381 uiout
->field_int ("core", core
);
1384 /* This end scope restores the current thread and the frame
1385 selected before the "info threads" command. */
1388 do_cleanups (old_chain
);
1390 if (pid
== -1 && requested_threads
== NULL
)
1392 if (uiout
->is_mi_like_p ()
1393 && inferior_ptid
!= null_ptid
)
1395 int num
= ptid_to_global_thread_id (inferior_ptid
);
1397 gdb_assert (num
!= 0);
1398 uiout
->field_int ("current-thread-id", num
);
1401 if (inferior_ptid
!= null_ptid
&& is_exited (inferior_ptid
))
1402 uiout
->message ("\n\
1403 The current thread <Thread ID %s> has terminated. See `help thread'.\n",
1404 print_thread_id (inferior_thread ()));
1405 else if (thread_list
!= NULL
&& inferior_ptid
== null_ptid
)
1406 uiout
->message ("\n\
1407 No selected thread. See `help thread'.\n");
1411 /* See gdbthread.h. */
1414 print_thread_info (struct ui_out
*uiout
, char *requested_threads
, int pid
)
1416 print_thread_info_1 (uiout
, requested_threads
, 1, pid
, 0);
1419 /* Implementation of the "info threads" command.
1421 Note: this has the drawback that it _really_ switches
1422 threads, which frees the frame cache. A no-side
1423 effects info-threads command would be nicer. */
1426 info_threads_command (char *arg
, int from_tty
)
1428 int show_global_ids
= 0;
1431 && check_for_argument (&arg
, "-gid", sizeof ("-gid") - 1))
1433 arg
= skip_spaces (arg
);
1434 show_global_ids
= 1;
1437 print_thread_info_1 (current_uiout
, arg
, 0, -1, show_global_ids
);
1440 /* See gdbthread.h. */
1443 switch_to_thread_no_regs (struct thread_info
*thread
)
1445 struct inferior
*inf
= thread
->inf
;
1447 set_current_program_space (inf
->pspace
);
1448 set_current_inferior (inf
);
1450 inferior_ptid
= thread
->ptid
;
1451 stop_pc
= ~(CORE_ADDR
) 0;
1454 /* Switch to no thread selected. */
1457 switch_to_no_thread ()
1459 if (inferior_ptid
== null_ptid
)
1462 inferior_ptid
= null_ptid
;
1463 reinit_frame_cache ();
1464 stop_pc
= ~(CORE_ADDR
) 0;
1467 /* Switch from one thread to another. */
1470 switch_to_thread (thread_info
*thr
)
1472 gdb_assert (thr
!= NULL
);
1474 if (inferior_ptid
== thr
->ptid
)
1477 switch_to_thread_no_regs (thr
);
1479 reinit_frame_cache ();
1481 /* We don't check for is_stopped, because we're called at times
1482 while in the TARGET_RUNNING state, e.g., while handling an
1484 if (thr
->state
!= THREAD_EXITED
1486 stop_pc
= regcache_read_pc (get_thread_regcache (thr
->ptid
));
1489 /* See gdbthread.h. */
1492 switch_to_thread (ptid_t ptid
)
1494 if (ptid
== null_ptid
)
1495 switch_to_no_thread ();
1497 switch_to_thread (find_thread_ptid (ptid
));
1501 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
1503 struct frame_info
*frame
= NULL
;
1506 /* This means there was no selected frame. */
1507 if (frame_level
== -1)
1509 select_frame (NULL
);
1513 gdb_assert (frame_level
>= 0);
1515 /* Restore by level first, check if the frame id is the same as
1516 expected. If that fails, try restoring by frame id. If that
1517 fails, nothing to do, just warn the user. */
1519 count
= frame_level
;
1520 frame
= find_relative_frame (get_current_frame (), &count
);
1523 /* The frame ids must match - either both valid or both outer_frame_id.
1524 The latter case is not failsafe, but since it's highly unlikely
1525 the search by level finds the wrong frame, it's 99.9(9)% of
1526 the time (for all practical purposes) safe. */
1527 && frame_id_eq (get_frame_id (frame
), a_frame_id
))
1529 /* Cool, all is fine. */
1530 select_frame (frame
);
1534 frame
= frame_find_by_id (a_frame_id
);
1537 /* Cool, refound it. */
1538 select_frame (frame
);
1542 /* Nothing else to do, the frame layout really changed. Select the
1543 innermost stack frame. */
1544 select_frame (get_current_frame ());
1546 /* Warn the user. */
1547 if (frame_level
> 0 && !current_uiout
->is_mi_like_p ())
1549 warning (_("Couldn't restore frame #%d in "
1550 "current thread. Bottom (innermost) frame selected:"),
1552 /* For MI, we should probably have a notification about
1553 current frame change. But this error is not very
1554 likely, so don't bother for now. */
1555 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
1559 scoped_restore_current_thread::~scoped_restore_current_thread ()
1561 /* If an entry of thread_info was previously selected, it won't be
1562 deleted because we've increased its refcount. The thread represented
1563 by this thread_info entry may have already exited (due to normal exit,
1564 detach, etc), so the thread_info.state is THREAD_EXITED. */
1565 if (m_thread
!= NULL
1566 /* If the previously selected thread belonged to a process that has
1567 in the mean time exited (or killed, detached, etc.), then don't revert
1568 back to it, but instead simply drop back to no thread selected. */
1570 switch_to_thread (m_thread
);
1573 switch_to_no_thread ();
1574 set_current_inferior (m_inf
);
1577 /* The running state of the originally selected thread may have
1578 changed, so we have to recheck it here. */
1579 if (inferior_ptid
!= null_ptid
1581 && is_stopped (inferior_ptid
)
1582 && target_has_registers
1584 && target_has_memory
)
1585 restore_selected_frame (m_selected_frame_id
, m_selected_frame_level
);
1587 if (m_thread
!= NULL
)
1588 m_thread
->decref ();
1592 scoped_restore_current_thread::scoped_restore_current_thread ()
1595 m_inf
= current_inferior ();
1597 if (inferior_ptid
!= null_ptid
)
1599 thread_info
*tp
= find_thread_ptid (inferior_ptid
);
1600 struct frame_info
*frame
;
1602 gdb_assert (tp
!= NULL
);
1604 m_was_stopped
= tp
->state
== THREAD_STOPPED
;
1606 && target_has_registers
1608 && target_has_memory
)
1610 /* When processing internal events, there might not be a
1611 selected frame. If we naively call get_selected_frame
1612 here, then we can end up reading debuginfo for the
1613 current frame, but we don't generally need the debuginfo
1615 frame
= get_selected_frame_if_set ();
1620 m_selected_frame_id
= get_frame_id (frame
);
1621 m_selected_frame_level
= frame_relative_level (frame
);
1630 /* See gdbthread.h. */
1633 show_thread_that_caused_stop (void)
1635 return highest_thread_num
> 1;
1638 /* See gdbthread.h. */
1641 show_inferior_qualified_tids (void)
1643 return (inferior_list
->next
!= NULL
|| inferior_list
->num
!= 1);
1646 /* See gdbthread.h. */
1649 print_thread_id (struct thread_info
*thr
)
1651 char *s
= get_print_cell ();
1653 if (show_inferior_qualified_tids ())
1654 xsnprintf (s
, PRINT_CELL_SIZE
, "%d.%d", thr
->inf
->num
, thr
->per_inf_num
);
1656 xsnprintf (s
, PRINT_CELL_SIZE
, "%d", thr
->per_inf_num
);
1660 /* If true, tp_array_compar should sort in ascending order, otherwise
1661 in descending order. */
1663 static bool tp_array_compar_ascending
;
1665 /* Sort an array for struct thread_info pointers by thread ID (first
1666 by inferior number, and then by per-inferior thread number). The
1667 order is determined by TP_ARRAY_COMPAR_ASCENDING. */
1670 tp_array_compar (const thread_info
*a
, const thread_info
*b
)
1672 if (a
->inf
->num
!= b
->inf
->num
)
1674 if (tp_array_compar_ascending
)
1675 return a
->inf
->num
< b
->inf
->num
;
1677 return a
->inf
->num
> b
->inf
->num
;
1680 if (tp_array_compar_ascending
)
1681 return (a
->per_inf_num
< b
->per_inf_num
);
1683 return (a
->per_inf_num
> b
->per_inf_num
);
1686 /* Apply a GDB command to a list of threads. List syntax is a whitespace
1687 seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
1688 of two numbers seperated by a hyphen. Examples:
1690 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
1691 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
1692 thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */
1695 thread_apply_all_command (char *cmd
, int from_tty
)
1697 tp_array_compar_ascending
= false;
1699 && check_for_argument (&cmd
, "-ascending", strlen ("-ascending")))
1701 cmd
= skip_spaces (cmd
);
1702 tp_array_compar_ascending
= true;
1705 if (cmd
== NULL
|| *cmd
== '\000')
1706 error (_("Please specify a command following the thread ID list"));
1708 update_thread_list ();
1710 /* Save a copy of the command in case it is clobbered by
1712 std::string saved_cmd
= cmd
;
1714 int tc
= live_threads_count ();
1717 /* Save a copy of the thread list and increment each thread's
1718 refcount while executing the command in the context of each
1719 thread, in case the command is one that wipes threads. E.g.,
1720 detach, kill, disconnect, etc., or even normally continuing
1721 over an inferior or thread exit. */
1722 std::vector
<thread_info
*> thr_list_cpy
;
1723 thr_list_cpy
.reserve (tc
);
1728 ALL_NON_EXITED_THREADS (tp
)
1730 thr_list_cpy
.push_back (tp
);
1733 gdb_assert (thr_list_cpy
.size () == tc
);
1736 /* Increment the refcounts, and restore them back on scope
1738 scoped_inc_dec_ref
inc_dec_ref (thr_list_cpy
);
1740 std::sort (thr_list_cpy
.begin (), thr_list_cpy
.end (), tp_array_compar
);
1742 scoped_restore_current_thread restore_thread
;
1744 for (thread_info
*thr
: thr_list_cpy
)
1745 if (thread_alive (thr
))
1747 switch_to_thread (thr
->ptid
);
1748 printf_filtered (_("\nThread %s (%s):\n"),
1749 print_thread_id (thr
),
1750 target_pid_to_str (inferior_ptid
));
1751 execute_command (cmd
, from_tty
);
1753 /* Restore exact command used previously. */
1754 strcpy (cmd
, saved_cmd
.c_str ());
1759 /* Implementation of the "thread apply" command. */
1762 thread_apply_command (char *tidlist
, int from_tty
)
1765 tid_range_parser parser
;
1767 if (tidlist
== NULL
|| *tidlist
== '\000')
1768 error (_("Please specify a thread ID list"));
1770 parser
.init (tidlist
, current_inferior ()->num
);
1771 while (!parser
.finished ())
1773 int inf_num
, thr_start
, thr_end
;
1775 if (!parser
.get_tid_range (&inf_num
, &thr_start
, &thr_end
))
1777 cmd
= (char *) parser
.cur_tok ();
1783 error (_("Please specify a command following the thread ID list"));
1785 if (tidlist
== cmd
|| !isalpha (cmd
[0]))
1786 invalid_thread_id_error (cmd
);
1788 /* Save a copy of the command in case it is clobbered by
1790 std::string saved_cmd
= cmd
;
1792 scoped_restore_current_thread restore_thread
;
1794 parser
.init (tidlist
, current_inferior ()->num
);
1795 while (!parser
.finished () && parser
.cur_tok () < cmd
)
1797 struct thread_info
*tp
= NULL
;
1798 struct inferior
*inf
;
1799 int inf_num
, thr_num
;
1801 parser
.get_tid (&inf_num
, &thr_num
);
1802 inf
= find_inferior_id (inf_num
);
1804 tp
= find_thread_id (inf
, thr_num
);
1806 if (parser
.in_star_range ())
1810 warning (_("Unknown inferior %d"), inf_num
);
1811 parser
.skip_range ();
1815 /* No use looking for threads past the highest thread number
1816 the inferior ever had. */
1817 if (thr_num
>= inf
->highest_thread_num
)
1818 parser
.skip_range ();
1820 /* Be quiet about unknown threads numbers. */
1827 if (show_inferior_qualified_tids () || parser
.tid_is_qualified ())
1828 warning (_("Unknown thread %d.%d"), inf_num
, thr_num
);
1830 warning (_("Unknown thread %d"), thr_num
);
1834 if (!thread_alive (tp
))
1836 warning (_("Thread %s has terminated."), print_thread_id (tp
));
1840 switch_to_thread (tp
->ptid
);
1842 printf_filtered (_("\nThread %s (%s):\n"), print_thread_id (tp
),
1843 target_pid_to_str (inferior_ptid
));
1844 execute_command (cmd
, from_tty
);
1846 /* Restore exact command used previously. */
1847 strcpy (cmd
, saved_cmd
.c_str ());
1851 /* Switch to the specified thread. Will dispatch off to thread_apply_command
1852 if prefix of arg is `apply'. */
1855 thread_command (char *tidstr
, int from_tty
)
1859 if (inferior_ptid
== null_ptid
)
1860 error (_("No thread selected"));
1862 if (target_has_stack
)
1864 struct thread_info
*tp
= inferior_thread ();
1866 if (is_exited (inferior_ptid
))
1867 printf_filtered (_("[Current thread is %s (%s) (exited)]\n"),
1868 print_thread_id (tp
),
1869 target_pid_to_str (inferior_ptid
));
1871 printf_filtered (_("[Current thread is %s (%s)]\n"),
1872 print_thread_id (tp
),
1873 target_pid_to_str (inferior_ptid
));
1876 error (_("No stack."));
1880 ptid_t previous_ptid
= inferior_ptid
;
1883 result
= gdb_thread_select (current_uiout
, tidstr
, NULL
);
1885 /* If thread switch did not succeed don't notify or print. */
1886 if (result
== GDB_RC_FAIL
)
1889 /* Print if the thread has not changed, otherwise an event will
1891 if (inferior_ptid
== previous_ptid
)
1893 print_selected_thread_frame (current_uiout
,
1894 USER_SELECTED_THREAD
1895 | USER_SELECTED_FRAME
);
1899 observer_notify_user_selected_context_changed (USER_SELECTED_THREAD
1900 | USER_SELECTED_FRAME
);
1905 /* Implementation of `thread name'. */
1908 thread_name_command (char *arg
, int from_tty
)
1910 struct thread_info
*info
;
1912 if (inferior_ptid
== null_ptid
)
1913 error (_("No thread selected"));
1915 arg
= skip_spaces (arg
);
1917 info
= inferior_thread ();
1919 info
->name
= arg
? xstrdup (arg
) : NULL
;
1922 /* Find thread ids with a name, target pid, or extra info matching ARG. */
1925 thread_find_command (char *arg
, int from_tty
)
1927 struct thread_info
*tp
;
1929 unsigned long match
= 0;
1931 if (arg
== NULL
|| *arg
== '\0')
1932 error (_("Command requires an argument."));
1934 tmp
= re_comp (arg
);
1936 error (_("Invalid regexp (%s): %s"), tmp
, arg
);
1938 update_thread_list ();
1939 for (tp
= thread_list
; tp
; tp
= tp
->next
)
1941 if (tp
->name
!= NULL
&& re_exec (tp
->name
))
1943 printf_filtered (_("Thread %s has name '%s'\n"),
1944 print_thread_id (tp
), tp
->name
);
1948 tmp
= target_thread_name (tp
);
1949 if (tmp
!= NULL
&& re_exec (tmp
))
1951 printf_filtered (_("Thread %s has target name '%s'\n"),
1952 print_thread_id (tp
), tmp
);
1956 tmp
= target_pid_to_str (tp
->ptid
);
1957 if (tmp
!= NULL
&& re_exec (tmp
))
1959 printf_filtered (_("Thread %s has target id '%s'\n"),
1960 print_thread_id (tp
), tmp
);
1964 tmp
= target_extra_thread_info (tp
);
1965 if (tmp
!= NULL
&& re_exec (tmp
))
1967 printf_filtered (_("Thread %s has extra info '%s'\n"),
1968 print_thread_id (tp
), tmp
);
1973 printf_filtered (_("No threads match '%s'\n"), arg
);
1976 /* Print notices when new threads are attached and detached. */
1977 int print_thread_events
= 1;
1979 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1980 struct cmd_list_element
*c
, const char *value
)
1982 fprintf_filtered (file
,
1983 _("Printing of thread events is %s.\n"),
1988 do_captured_thread_select (struct ui_out
*uiout
, void *tidstr_v
)
1990 const char *tidstr
= (const char *) tidstr_v
;
1991 struct thread_info
*tp
;
1993 if (uiout
->is_mi_like_p ())
1995 int num
= value_as_long (parse_and_eval (tidstr
));
1997 tp
= find_thread_global_id (num
);
1999 error (_("Thread ID %d not known."), num
);
2003 tp
= parse_thread_id (tidstr
, NULL
);
2004 gdb_assert (tp
!= NULL
);
2007 if (!thread_alive (tp
))
2008 error (_("Thread ID %s has terminated."), tidstr
);
2010 switch_to_thread (tp
->ptid
);
2012 annotate_thread_changed ();
2014 /* Since the current thread may have changed, see if there is any
2015 exited thread we can now delete. */
2021 /* Print thread and frame switch command response. */
2024 print_selected_thread_frame (struct ui_out
*uiout
,
2025 user_selected_what selection
)
2027 struct thread_info
*tp
= inferior_thread ();
2028 struct inferior
*inf
= current_inferior ();
2030 if (selection
& USER_SELECTED_THREAD
)
2032 if (uiout
->is_mi_like_p ())
2034 uiout
->field_int ("new-thread-id",
2035 inferior_thread ()->global_num
);
2039 uiout
->text ("[Switching to thread ");
2040 uiout
->field_string ("new-thread-id", print_thread_id (tp
));
2042 uiout
->text (target_pid_to_str (inferior_ptid
));
2047 if (tp
->state
== THREAD_RUNNING
)
2049 if (selection
& USER_SELECTED_THREAD
)
2050 uiout
->text ("(running)\n");
2052 else if (selection
& USER_SELECTED_FRAME
)
2054 if (selection
& USER_SELECTED_THREAD
)
2057 if (has_stack_frames ())
2058 print_stack_frame_to_uiout (uiout
, get_selected_frame (NULL
),
2064 gdb_thread_select (struct ui_out
*uiout
, char *tidstr
, char **error_message
)
2066 if (catch_exceptions_with_msg (uiout
, do_captured_thread_select
, tidstr
,
2067 error_message
, RETURN_MASK_ALL
) < 0)
2072 /* Update the 'threads_executing' global based on the threads we know
2076 update_threads_executing (void)
2078 struct thread_info
*tp
;
2080 threads_executing
= 0;
2081 ALL_NON_EXITED_THREADS (tp
)
2085 threads_executing
= 1;
2092 update_thread_list (void)
2094 target_update_thread_list ();
2095 update_threads_executing ();
2098 /* Return a new value for the selected thread's id. Return a value of
2099 0 if no thread is selected. If GLOBAL is true, return the thread's
2100 global number. Otherwise return the per-inferior number. */
2102 static struct value
*
2103 thread_num_make_value_helper (struct gdbarch
*gdbarch
, int global
)
2105 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
2111 int_val
= tp
->global_num
;
2113 int_val
= tp
->per_inf_num
;
2115 return value_from_longest (builtin_type (gdbarch
)->builtin_int
, int_val
);
2118 /* Return a new value for the selected thread's per-inferior thread
2119 number. Return a value of 0 if no thread is selected, or no
2122 static struct value
*
2123 thread_id_per_inf_num_make_value (struct gdbarch
*gdbarch
,
2124 struct internalvar
*var
,
2127 return thread_num_make_value_helper (gdbarch
, 0);
2130 /* Return a new value for the selected thread's global id. Return a
2131 value of 0 if no thread is selected, or no threads exist. */
2133 static struct value
*
2134 global_thread_id_make_value (struct gdbarch
*gdbarch
, struct internalvar
*var
,
2137 return thread_num_make_value_helper (gdbarch
, 1);
2140 /* Commands with a prefix of `thread'. */
2141 struct cmd_list_element
*thread_cmd_list
= NULL
;
2143 /* Implementation of `thread' variable. */
2145 static const struct internalvar_funcs thread_funcs
=
2147 thread_id_per_inf_num_make_value
,
2152 /* Implementation of `gthread' variable. */
2154 static const struct internalvar_funcs gthread_funcs
=
2156 global_thread_id_make_value
,
2162 _initialize_thread (void)
2164 static struct cmd_list_element
*thread_apply_list
= NULL
;
2166 add_info ("threads", info_threads_command
,
2167 _("Display currently known threads.\n\
2168 Usage: info threads [-gid] [ID]...\n\
2169 -gid: Show global thread IDs.\n\
2170 If ID is given, it is a space-separated list of IDs of threads to display.\n\
2171 Otherwise, all threads are displayed."));
2173 add_prefix_cmd ("thread", class_run
, thread_command
, _("\
2174 Use this command to switch between threads.\n\
2175 The new thread ID must be currently known."),
2176 &thread_cmd_list
, "thread ", 1, &cmdlist
);
2178 add_prefix_cmd ("apply", class_run
, thread_apply_command
,
2179 _("Apply a command to a list of threads."),
2180 &thread_apply_list
, "thread apply ", 1, &thread_cmd_list
);
2182 add_cmd ("all", class_run
, thread_apply_all_command
,
2184 Apply a command to all threads.\n\
2186 Usage: thread apply all [-ascending] <command>\n\
2187 -ascending: Call <command> for all threads in ascending order.\n\
2188 The default is descending order.\
2190 &thread_apply_list
);
2192 add_cmd ("name", class_run
, thread_name_command
,
2193 _("Set the current thread's name.\n\
2194 Usage: thread name [NAME]\n\
2195 If NAME is not given, then any existing name is removed."), &thread_cmd_list
);
2197 add_cmd ("find", class_run
, thread_find_command
, _("\
2198 Find threads that match a regular expression.\n\
2199 Usage: thread find REGEXP\n\
2200 Will display thread ids whose name, target ID, or extra info matches REGEXP."),
2203 add_com_alias ("t", "thread", class_run
, 1);
2205 add_setshow_boolean_cmd ("thread-events", no_class
,
2206 &print_thread_events
, _("\
2207 Set printing of thread events (such as thread start and exit)."), _("\
2208 Show printing of thread events (such as thread start and exit)."), NULL
,
2210 show_print_thread_events
,
2211 &setprintlist
, &showprintlist
);
2213 create_internalvar_type_lazy ("_thread", &thread_funcs
, NULL
);
2214 create_internalvar_type_lazy ("_gthread", >hread_funcs
, NULL
);