1 /* Multi-process/thread control for GDB, the GNU debugger.
3 Copyright (C) 1986-2019 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/>. */
26 #include "common/environ.h"
29 #include "gdbthread.h"
36 #include <sys/types.h>
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-option.h"
43 #include "gdb_regex.h"
44 #include "cli/cli-utils.h"
45 #include "thread-fsm.h"
46 #include "tid-parse.h"
48 #include "common/gdb_optional.h"
49 #include "inline-frame.h"
52 /* Definition of struct thread_info exported to gdbthread.h. */
54 /* Prototypes for local functions. */
56 static int highest_thread_num
;
58 /* True if any thread is, or may be executing. We need to track this
59 separately because until we fully sync the thread list, we won't
60 know whether the target is fully stopped, even if we see stop
61 events for all known threads, because any of those threads may have
62 spawned new threads we haven't heard of yet. */
63 static int threads_executing
;
65 static int thread_alive (struct thread_info
*);
67 /* RAII type used to increase / decrease the refcount of each thread
68 in a given list of threads. */
70 class scoped_inc_dec_ref
73 explicit scoped_inc_dec_ref (const std::vector
<thread_info
*> &thrds
)
76 for (thread_info
*thr
: m_thrds
)
80 ~scoped_inc_dec_ref ()
82 for (thread_info
*thr
: m_thrds
)
87 const std::vector
<thread_info
*> &m_thrds
;
92 inferior_thread (void)
94 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
99 /* Delete the breakpoint pointed at by BP_P, if there's one. */
102 delete_thread_breakpoint (struct breakpoint
**bp_p
)
106 delete_breakpoint (*bp_p
);
112 delete_step_resume_breakpoint (struct thread_info
*tp
)
115 delete_thread_breakpoint (&tp
->control
.step_resume_breakpoint
);
119 delete_exception_resume_breakpoint (struct thread_info
*tp
)
122 delete_thread_breakpoint (&tp
->control
.exception_resume_breakpoint
);
125 /* See gdbthread.h. */
128 delete_single_step_breakpoints (struct thread_info
*tp
)
131 delete_thread_breakpoint (&tp
->control
.single_step_breakpoints
);
134 /* Delete the breakpoint pointed at by BP_P at the next stop, if
138 delete_at_next_stop (struct breakpoint
**bp
)
142 (*bp
)->disposition
= disp_del_at_next_stop
;
147 /* See gdbthread.h. */
150 thread_has_single_step_breakpoints_set (struct thread_info
*tp
)
152 return tp
->control
.single_step_breakpoints
!= NULL
;
155 /* See gdbthread.h. */
158 thread_has_single_step_breakpoint_here (struct thread_info
*tp
,
159 const address_space
*aspace
,
162 struct breakpoint
*ss_bps
= tp
->control
.single_step_breakpoints
;
164 return (ss_bps
!= NULL
165 && breakpoint_has_location_inserted_here (ss_bps
, aspace
, addr
));
168 /* See gdbthread.h. */
171 thread_cancel_execution_command (struct thread_info
*thr
)
173 if (thr
->thread_fsm
!= NULL
)
175 thr
->thread_fsm
->clean_up (thr
);
176 delete thr
->thread_fsm
;
177 thr
->thread_fsm
= NULL
;
182 clear_thread_inferior_resources (struct thread_info
*tp
)
184 /* NOTE: this will take care of any left-over step_resume breakpoints,
185 but not any user-specified thread-specific breakpoints. We can not
186 delete the breakpoint straight-off, because the inferior might not
187 be stopped at the moment. */
188 delete_at_next_stop (&tp
->control
.step_resume_breakpoint
);
189 delete_at_next_stop (&tp
->control
.exception_resume_breakpoint
);
190 delete_at_next_stop (&tp
->control
.single_step_breakpoints
);
192 delete_longjmp_breakpoint_at_next_stop (tp
->global_num
);
194 bpstat_clear (&tp
->control
.stop_bpstat
);
196 btrace_teardown (tp
);
198 thread_cancel_execution_command (tp
);
200 clear_inline_frame_state (tp
->ptid
);
203 /* Set the TP's state as exited. */
206 set_thread_exited (thread_info
*tp
, int silent
)
208 /* Dead threads don't need to step-over. Remove from queue. */
209 if (tp
->step_over_next
!= NULL
)
210 thread_step_over_chain_remove (tp
);
212 if (tp
->state
!= THREAD_EXITED
)
214 gdb::observers::thread_exit
.notify (tp
, silent
);
216 /* Tag it as exited. */
217 tp
->state
= THREAD_EXITED
;
219 /* Clear breakpoints, etc. associated with this thread. */
220 clear_thread_inferior_resources (tp
);
225 init_thread_list (void)
227 highest_thread_num
= 0;
229 for (thread_info
*tp
: all_threads_safe ())
231 inferior
*inf
= tp
->inf
;
233 if (tp
->deletable ())
236 set_thread_exited (tp
, 1);
238 inf
->thread_list
= NULL
;
242 /* Allocate a new thread of inferior INF with target id PTID and add
243 it to the thread list. */
245 static struct thread_info
*
246 new_thread (struct inferior
*inf
, ptid_t ptid
)
248 thread_info
*tp
= new thread_info (inf
, ptid
);
250 if (inf
->thread_list
== NULL
)
251 inf
->thread_list
= tp
;
254 struct thread_info
*last
;
256 for (last
= inf
->thread_list
; last
->next
!= NULL
; last
= last
->next
)
265 add_thread_silent (ptid_t ptid
)
267 struct inferior
*inf
= find_inferior_ptid (ptid
);
268 gdb_assert (inf
!= NULL
);
270 thread_info
*tp
= find_thread_ptid (inf
, ptid
);
272 /* Found an old thread with the same id. It has to be dead,
273 otherwise we wouldn't be adding a new thread with the same id.
274 The OS is reusing this id --- delete it, and recreate a new
277 /* In addition to deleting the thread, if this is the current
278 thread, then we need to take care that delete_thread doesn't
279 really delete the thread if it is inferior_ptid. Create a
280 new template thread in the list with an invalid ptid, switch
281 to it, delete the original thread, reset the new thread's
282 ptid, and switch to it. */
284 if (inferior_ptid
== ptid
)
286 thread_info
*new_thr
= new_thread (inf
, null_ptid
);
288 /* Make switch_to_thread not read from the thread. */
289 new_thr
->state
= THREAD_EXITED
;
290 switch_to_no_thread ();
292 /* Now we can delete it. */
295 /* Now reset its ptid, and reswitch inferior_ptid to it. */
296 new_thr
->ptid
= ptid
;
297 new_thr
->state
= THREAD_STOPPED
;
298 switch_to_thread (new_thr
);
300 gdb::observers::new_thread
.notify (new_thr
);
306 /* Just go ahead and delete it. */
310 tp
= new_thread (inf
, ptid
);
311 gdb::observers::new_thread
.notify (tp
);
317 add_thread_with_info (ptid_t ptid
, private_thread_info
*priv
)
319 struct thread_info
*result
= add_thread_silent (ptid
);
321 result
->priv
.reset (priv
);
323 if (print_thread_events
)
324 printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid
).c_str ());
326 annotate_new_thread ();
331 add_thread (ptid_t ptid
)
333 return add_thread_with_info (ptid
, NULL
);
336 private_thread_info::~private_thread_info () = default;
338 thread_info::thread_info (struct inferior
*inf_
, ptid_t ptid_
)
339 : ptid (ptid_
), inf (inf_
)
341 gdb_assert (inf_
!= NULL
);
343 this->global_num
= ++highest_thread_num
;
344 this->per_inf_num
= ++inf_
->highest_thread_num
;
346 /* Nothing to follow yet. */
347 memset (&this->pending_follow
, 0, sizeof (this->pending_follow
));
348 this->pending_follow
.kind
= TARGET_WAITKIND_SPURIOUS
;
349 this->suspend
.waitstatus
.kind
= TARGET_WAITKIND_IGNORE
;
352 thread_info::~thread_info ()
357 /* See gdbthread.h. */
360 thread_info::deletable () const
362 /* If this is the current thread, or there's code out there that
363 relies on it existing (refcount > 0) we can't delete yet. */
364 return refcount () == 0 && ptid
!= inferior_ptid
;
367 /* Add TP to the end of the step-over chain LIST_P. */
370 step_over_chain_enqueue (struct thread_info
**list_p
, struct thread_info
*tp
)
372 gdb_assert (tp
->step_over_next
== NULL
);
373 gdb_assert (tp
->step_over_prev
== NULL
);
378 tp
->step_over_prev
= tp
->step_over_next
= tp
;
382 struct thread_info
*head
= *list_p
;
383 struct thread_info
*tail
= head
->step_over_prev
;
385 tp
->step_over_prev
= tail
;
386 tp
->step_over_next
= head
;
387 head
->step_over_prev
= tp
;
388 tail
->step_over_next
= tp
;
392 /* Remove TP from step-over chain LIST_P. */
395 step_over_chain_remove (struct thread_info
**list_p
, struct thread_info
*tp
)
397 gdb_assert (tp
->step_over_next
!= NULL
);
398 gdb_assert (tp
->step_over_prev
!= NULL
);
402 if (tp
== tp
->step_over_next
)
405 *list_p
= tp
->step_over_next
;
408 tp
->step_over_prev
->step_over_next
= tp
->step_over_next
;
409 tp
->step_over_next
->step_over_prev
= tp
->step_over_prev
;
410 tp
->step_over_prev
= tp
->step_over_next
= NULL
;
413 /* See gdbthread.h. */
416 thread_step_over_chain_next (struct thread_info
*tp
)
418 struct thread_info
*next
= tp
->step_over_next
;
420 return (next
== step_over_queue_head
? NULL
: next
);
423 /* See gdbthread.h. */
426 thread_is_in_step_over_chain (struct thread_info
*tp
)
428 return (tp
->step_over_next
!= NULL
);
431 /* See gdbthread.h. */
434 thread_step_over_chain_enqueue (struct thread_info
*tp
)
436 step_over_chain_enqueue (&step_over_queue_head
, tp
);
439 /* See gdbthread.h. */
442 thread_step_over_chain_remove (struct thread_info
*tp
)
444 step_over_chain_remove (&step_over_queue_head
, tp
);
447 /* Delete the thread referenced by THR. If SILENT, don't notifyi
448 the observer of this exit.
450 THR must not be NULL or a failed assertion will be raised. */
453 delete_thread_1 (thread_info
*thr
, bool silent
)
455 gdb_assert (thr
!= nullptr);
457 struct thread_info
*tp
, *tpprev
= NULL
;
459 for (tp
= thr
->inf
->thread_list
; tp
; tpprev
= tp
, tp
= tp
->next
)
466 set_thread_exited (tp
, silent
);
468 if (!tp
->deletable ())
470 /* Will be really deleted some other time. */
475 tpprev
->next
= tp
->next
;
477 tp
->inf
->thread_list
= tp
->next
;
482 /* Delete thread THREAD and notify of thread exit. If this is the
483 current thread, don't actually delete it, but tag it as exited and
484 do the notification. If this is the user selected thread, clear
488 delete_thread (thread_info
*thread
)
490 delete_thread_1 (thread
, false /* not silent */);
494 delete_thread_silent (thread_info
*thread
)
496 delete_thread_1 (thread
, true /* silent */);
500 find_thread_global_id (int global_id
)
502 for (thread_info
*tp
: all_threads ())
503 if (tp
->global_num
== global_id
)
509 static struct thread_info
*
510 find_thread_id (struct inferior
*inf
, int thr_num
)
512 for (thread_info
*tp
: inf
->threads ())
513 if (tp
->per_inf_num
== thr_num
)
519 /* Find a thread_info by matching PTID. */
522 find_thread_ptid (ptid_t ptid
)
524 inferior
*inf
= find_inferior_ptid (ptid
);
527 return find_thread_ptid (inf
, ptid
);
530 /* See gdbthread.h. */
533 find_thread_ptid (inferior
*inf
, ptid_t ptid
)
535 for (thread_info
*tp
: inf
->threads ())
536 if (tp
->ptid
== ptid
)
542 /* See gdbthread.h. */
545 find_thread_by_handle (gdb::array_view
<const gdb_byte
> handle
,
546 struct inferior
*inf
)
548 return target_thread_handle_to_thread_info (handle
.data (),
554 * Thread iterator function.
556 * Calls a callback function once for each thread, so long as
557 * the callback function returns false. If the callback function
558 * returns true, the iteration will end and the current thread
559 * will be returned. This can be useful for implementing a
560 * search for a thread with arbitrary attributes, or for applying
561 * some operation to every thread.
563 * FIXME: some of the existing functionality, such as
564 * "Thread apply all", might be rewritten using this functionality.
568 iterate_over_threads (int (*callback
) (struct thread_info
*, void *),
571 for (thread_info
*tp
: all_threads_safe ())
572 if ((*callback
) (tp
, data
))
578 /* See gdbthread.h. */
583 for (thread_info
*tp ATTRIBUTE_UNUSED
: all_threads ())
591 auto rng
= all_threads ();
592 return std::distance (rng
.begin (), rng
.end ());
595 /* Return the number of non-exited threads in the thread list. */
598 live_threads_count (void)
600 auto rng
= all_non_exited_threads ();
601 return std::distance (rng
.begin (), rng
.end ());
605 valid_global_thread_id (int global_id
)
607 for (thread_info
*tp
: all_threads ())
608 if (tp
->global_num
== global_id
)
615 in_thread_list (ptid_t ptid
)
617 return find_thread_ptid (ptid
) != nullptr;
620 /* Finds the first thread of the inferior. */
623 first_thread_of_inferior (inferior
*inf
)
625 return inf
->thread_list
;
629 any_thread_of_inferior (inferior
*inf
)
631 gdb_assert (inf
->pid
!= 0);
633 /* Prefer the current thread. */
634 if (inf
== current_inferior ())
635 return inferior_thread ();
637 for (thread_info
*tp
: inf
->non_exited_threads ())
644 any_live_thread_of_inferior (inferior
*inf
)
646 struct thread_info
*curr_tp
= NULL
;
647 struct thread_info
*tp_executing
= NULL
;
649 gdb_assert (inf
!= NULL
&& inf
->pid
!= 0);
651 /* Prefer the current thread if it's not executing. */
652 if (inferior_ptid
!= null_ptid
&& current_inferior () == inf
)
654 /* If the current thread is dead, forget it. If it's not
655 executing, use it. Otherwise, still choose it (below), but
656 only if no other non-executing thread is found. */
657 curr_tp
= inferior_thread ();
658 if (curr_tp
->state
== THREAD_EXITED
)
660 else if (!curr_tp
->executing
)
664 for (thread_info
*tp
: inf
->non_exited_threads ())
672 /* If both the current thread and all live threads are executing,
673 prefer the current thread. */
677 /* Otherwise, just return an executing thread, if any. */
681 /* Return true if TP is an active thread. */
683 thread_alive (struct thread_info
*tp
)
685 if (tp
->state
== THREAD_EXITED
)
687 if (!target_thread_alive (tp
->ptid
))
692 /* See gdbthreads.h. */
697 for (thread_info
*tp
: all_threads_safe ())
698 if (!thread_alive (tp
))
702 /* See gdbthreads.h. */
705 delete_exited_threads (void)
707 for (thread_info
*tp
: all_threads_safe ())
708 if (tp
->state
== THREAD_EXITED
)
712 /* Return true value if stack temporaies are enabled for the thread
716 thread_stack_temporaries_enabled_p (thread_info
*tp
)
721 return tp
->stack_temporaries_enabled
;
724 /* Push V on to the stack temporaries of the thread with id PTID. */
727 push_thread_stack_temporary (thread_info
*tp
, struct value
*v
)
729 gdb_assert (tp
!= NULL
&& tp
->stack_temporaries_enabled
);
730 tp
->stack_temporaries
.push_back (v
);
733 /* Return true if VAL is among the stack temporaries of the thread
734 TP. Return false otherwise. */
737 value_in_thread_stack_temporaries (struct value
*val
, thread_info
*tp
)
739 gdb_assert (tp
!= NULL
&& tp
->stack_temporaries_enabled
);
740 for (value
*v
: tp
->stack_temporaries
)
747 /* Return the last of the stack temporaries for thread with id PTID.
748 Return NULL if there are no stack temporaries for the thread. */
751 get_last_thread_stack_temporary (thread_info
*tp
)
753 struct value
*lastval
= NULL
;
755 gdb_assert (tp
!= NULL
);
756 if (!tp
->stack_temporaries
.empty ())
757 lastval
= tp
->stack_temporaries
.back ();
763 thread_change_ptid (ptid_t old_ptid
, ptid_t new_ptid
)
765 struct inferior
*inf
;
766 struct thread_info
*tp
;
768 /* It can happen that what we knew as the target inferior id
769 changes. E.g, target remote may only discover the remote process
770 pid after adding the inferior to GDB's list. */
771 inf
= find_inferior_ptid (old_ptid
);
772 inf
->pid
= new_ptid
.pid ();
774 tp
= find_thread_ptid (inf
, old_ptid
);
777 gdb::observers::thread_ptid_changed
.notify (old_ptid
, new_ptid
);
780 /* See gdbthread.h. */
783 set_resumed (ptid_t ptid
, int resumed
)
785 for (thread_info
*tp
: all_non_exited_threads (ptid
))
786 tp
->resumed
= resumed
;
789 /* Helper for set_running, that marks one thread either running or
793 set_running_thread (struct thread_info
*tp
, int running
)
797 if (running
&& tp
->state
== THREAD_STOPPED
)
799 tp
->state
= running
? THREAD_RUNNING
: THREAD_STOPPED
;
803 /* If the thread is now marked stopped, remove it from
804 the step-over queue, so that we don't try to resume
805 it until the user wants it to. */
806 if (tp
->step_over_next
!= NULL
)
807 thread_step_over_chain_remove (tp
);
813 /* See gdbthread.h. */
816 thread_info::set_running (bool running
)
818 if (set_running_thread (this, running
))
819 gdb::observers::target_resumed
.notify (this->ptid
);
823 set_running (ptid_t ptid
, int running
)
825 /* We try not to notify the observer if no thread has actually
826 changed the running state -- merely to reduce the number of
827 messages to the MI frontend. A frontend is supposed to handle
828 multiple *running notifications just fine. */
829 bool any_started
= false;
831 for (thread_info
*tp
: all_non_exited_threads (ptid
))
832 if (set_running_thread (tp
, running
))
836 gdb::observers::target_resumed
.notify (ptid
);
840 /* Helper for set_executing. Set's the thread's 'executing' field
841 from EXECUTING, and if EXECUTING is true also clears the thread's
845 set_executing_thread (thread_info
*thr
, bool executing
)
847 thr
->executing
= executing
;
849 thr
->suspend
.stop_pc
= ~(CORE_ADDR
) 0;
853 set_executing (ptid_t ptid
, int executing
)
855 for (thread_info
*tp
: all_non_exited_threads (ptid
))
856 set_executing_thread (tp
, executing
);
858 /* It only takes one running thread to spawn more threads. */
860 threads_executing
= 1;
861 /* Only clear the flag if the caller is telling us everything is
863 else if (minus_one_ptid
== ptid
)
864 threads_executing
= 0;
867 /* See gdbthread.h. */
870 threads_are_executing (void)
872 return threads_executing
;
876 set_stop_requested (ptid_t ptid
, int stop
)
878 for (thread_info
*tp
: all_non_exited_threads (ptid
))
879 tp
->stop_requested
= stop
;
881 /* Call the stop requested observer so other components of GDB can
882 react to this request. */
884 gdb::observers::thread_stop_requested
.notify (ptid
);
888 finish_thread_state (ptid_t ptid
)
890 bool any_started
= false;
892 for (thread_info
*tp
: all_non_exited_threads (ptid
))
893 if (set_running_thread (tp
, tp
->executing
))
897 gdb::observers::target_resumed
.notify (ptid
);
900 /* See gdbthread.h. */
903 validate_registers_access (void)
905 /* No selected thread, no registers. */
906 if (inferior_ptid
== null_ptid
)
907 error (_("No thread selected."));
909 thread_info
*tp
= inferior_thread ();
911 /* Don't try to read from a dead thread. */
912 if (tp
->state
== THREAD_EXITED
)
913 error (_("The current thread has terminated"));
915 /* ... or from a spinning thread. FIXME: This isn't actually fully
916 correct. It'll allow an user-requested access (e.g., "print $pc"
917 at the prompt) when a thread is not executing for some internal
918 reason, but is marked running from the user's perspective. E.g.,
919 the thread is waiting for its turn in the step-over queue. */
921 error (_("Selected thread is running."));
924 /* See gdbthread.h. */
927 can_access_registers_thread (thread_info
*thread
)
929 /* No thread, no registers. */
933 /* Don't try to read from a dead thread. */
934 if (thread
->state
== THREAD_EXITED
)
937 /* ... or from a spinning thread. FIXME: see validate_registers_access. */
938 if (thread
->executing
)
945 pc_in_thread_step_range (CORE_ADDR pc
, struct thread_info
*thread
)
947 return (pc
>= thread
->control
.step_range_start
948 && pc
< thread
->control
.step_range_end
);
951 /* Helper for print_thread_info. Returns true if THR should be
952 printed. If REQUESTED_THREADS, a list of GDB ids/ranges, is not
953 NULL, only print THR if its ID is included in the list. GLOBAL_IDS
954 is true if REQUESTED_THREADS is list of global IDs, false if a list
955 of per-inferior thread ids. If PID is not -1, only print THR if it
956 is a thread from the process PID. Otherwise, threads from all
957 attached PIDs are printed. If both REQUESTED_THREADS is not NULL
958 and PID is not -1, then the thread is printed if it belongs to the
959 specified process. Otherwise, an error is raised. */
962 should_print_thread (const char *requested_threads
, int default_inf_num
,
963 int global_ids
, int pid
, struct thread_info
*thr
)
965 if (requested_threads
!= NULL
&& *requested_threads
!= '\0')
970 in_list
= number_is_in_list (requested_threads
, thr
->global_num
);
972 in_list
= tid_is_in_list (requested_threads
, default_inf_num
,
973 thr
->inf
->num
, thr
->per_inf_num
);
978 if (pid
!= -1 && thr
->ptid
.pid () != pid
)
980 if (requested_threads
!= NULL
&& *requested_threads
!= '\0')
981 error (_("Requested thread not found in requested process"));
985 if (thr
->state
== THREAD_EXITED
)
991 /* Return the string to display in "info threads"'s "Target Id"
995 thread_target_id_str (thread_info
*tp
)
997 std::string target_id
= target_pid_to_str (tp
->ptid
);
998 const char *extra_info
= target_extra_thread_info (tp
);
999 const char *name
= tp
->name
!= nullptr ? tp
->name
: target_thread_name (tp
);
1001 if (extra_info
!= nullptr && name
!= nullptr)
1002 return string_printf ("%s \"%s\" (%s)", target_id
.c_str (), name
,
1004 else if (extra_info
!= nullptr)
1005 return string_printf ("%s (%s)", target_id
.c_str (), extra_info
);
1006 else if (name
!= nullptr)
1007 return string_printf ("%s \"%s\"", target_id
.c_str (), name
);
1012 /* Like print_thread_info, but in addition, GLOBAL_IDS indicates
1013 whether REQUESTED_THREADS is a list of global or per-inferior
1017 print_thread_info_1 (struct ui_out
*uiout
, const char *requested_threads
,
1018 int global_ids
, int pid
,
1019 int show_global_ids
)
1021 int default_inf_num
= current_inferior ()->num
;
1023 update_thread_list ();
1025 /* Whether we saw any thread. */
1026 bool any_thread
= false;
1027 /* Whether the current thread is exited. */
1028 bool current_exited
= false;
1030 thread_info
*current_thread
= (inferior_ptid
!= null_ptid
1031 ? inferior_thread () : NULL
);
1034 /* For backward compatibility, we make a list for MI. A table is
1035 preferable for the CLI, though, because it shows table
1037 gdb::optional
<ui_out_emit_list
> list_emitter
;
1038 gdb::optional
<ui_out_emit_table
> table_emitter
;
1040 if (uiout
->is_mi_like_p ())
1041 list_emitter
.emplace (uiout
, "threads");
1045 /* The width of the "Target Id" column. Grown below to
1046 accommodate the largest entry. */
1047 size_t target_id_col_width
= 17;
1049 for (thread_info
*tp
: all_threads ())
1051 if (!should_print_thread (requested_threads
, default_inf_num
,
1052 global_ids
, pid
, tp
))
1055 if (!uiout
->is_mi_like_p ())
1058 = std::max (target_id_col_width
,
1059 thread_target_id_str (tp
).size ());
1067 if (requested_threads
== NULL
|| *requested_threads
== '\0')
1068 uiout
->message (_("No threads.\n"));
1070 uiout
->message (_("No threads match '%s'.\n"),
1075 table_emitter
.emplace (uiout
, show_global_ids
? 5 : 4,
1076 n_threads
, "threads");
1078 uiout
->table_header (1, ui_left
, "current", "");
1079 uiout
->table_header (4, ui_left
, "id-in-tg", "Id");
1080 if (show_global_ids
)
1081 uiout
->table_header (4, ui_left
, "id", "GId");
1082 uiout
->table_header (target_id_col_width
, ui_left
,
1083 "target-id", "Target Id");
1084 uiout
->table_header (1, ui_left
, "frame", "Frame");
1085 uiout
->table_body ();
1088 /* We'll be switching threads temporarily. */
1089 scoped_restore_current_thread restore_thread
;
1091 for (inferior
*inf
: all_inferiors ())
1092 for (thread_info
*tp
: inf
->threads ())
1097 if (tp
== current_thread
&& tp
->state
== THREAD_EXITED
)
1098 current_exited
= true;
1100 if (!should_print_thread (requested_threads
, default_inf_num
,
1101 global_ids
, pid
, tp
))
1104 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
1106 if (!uiout
->is_mi_like_p ())
1108 if (tp
== current_thread
)
1109 uiout
->field_string ("current", "*");
1111 uiout
->field_skip ("current");
1113 uiout
->field_string ("id-in-tg", print_thread_id (tp
));
1116 if (show_global_ids
|| uiout
->is_mi_like_p ())
1117 uiout
->field_int ("id", tp
->global_num
);
1119 /* For the CLI, we stuff everything into the target-id field.
1120 This is a gross hack to make the output come out looking
1121 correct. The underlying problem here is that ui-out has no
1122 way to specify that a field's space allocation should be
1123 shared by several fields. For MI, we do the right thing
1126 if (uiout
->is_mi_like_p ())
1128 uiout
->field_string ("target-id", target_pid_to_str (tp
->ptid
));
1130 const char *extra_info
= target_extra_thread_info (tp
);
1131 if (extra_info
!= nullptr)
1132 uiout
->field_string ("details", extra_info
);
1134 const char *name
= (tp
->name
!= nullptr
1136 : target_thread_name (tp
));
1138 uiout
->field_string ("name", name
);
1142 uiout
->field_string ("target-id",
1143 thread_target_id_str (tp
).c_str ());
1146 if (tp
->state
== THREAD_RUNNING
)
1147 uiout
->text ("(running)\n");
1150 /* The switch below puts us at the top of the stack (leaf
1152 switch_to_thread (tp
);
1153 print_stack_frame (get_selected_frame (NULL
),
1154 /* For MI output, print frame level. */
1155 uiout
->is_mi_like_p (),
1159 if (uiout
->is_mi_like_p ())
1161 const char *state
= "stopped";
1163 if (tp
->state
== THREAD_RUNNING
)
1165 uiout
->field_string ("state", state
);
1168 core
= target_core_of_thread (tp
->ptid
);
1169 if (uiout
->is_mi_like_p () && core
!= -1)
1170 uiout
->field_int ("core", core
);
1173 /* This end scope restores the current thread and the frame
1174 selected before the "info threads" command, and it finishes the
1175 ui-out list or table. */
1178 if (pid
== -1 && requested_threads
== NULL
)
1180 if (uiout
->is_mi_like_p () && inferior_ptid
!= null_ptid
)
1181 uiout
->field_int ("current-thread-id", current_thread
->global_num
);
1183 if (inferior_ptid
!= null_ptid
&& current_exited
)
1184 uiout
->message ("\n\
1185 The current thread <Thread ID %s> has terminated. See `help thread'.\n",
1186 print_thread_id (inferior_thread ()));
1187 else if (any_thread
&& inferior_ptid
== null_ptid
)
1188 uiout
->message ("\n\
1189 No selected thread. See `help thread'.\n");
1193 /* See gdbthread.h. */
1196 print_thread_info (struct ui_out
*uiout
, const char *requested_threads
,
1199 print_thread_info_1 (uiout
, requested_threads
, 1, pid
, 0);
1202 /* Implementation of the "info threads" command.
1204 Note: this has the drawback that it _really_ switches
1205 threads, which frees the frame cache. A no-side
1206 effects info-threads command would be nicer. */
1209 info_threads_command (const char *arg
, int from_tty
)
1211 int show_global_ids
= 0;
1214 && check_for_argument (&arg
, "-gid", sizeof ("-gid") - 1))
1216 arg
= skip_spaces (arg
);
1217 show_global_ids
= 1;
1220 print_thread_info_1 (current_uiout
, arg
, 0, -1, show_global_ids
);
1223 /* See gdbthread.h. */
1226 switch_to_thread_no_regs (struct thread_info
*thread
)
1228 struct inferior
*inf
= thread
->inf
;
1230 set_current_program_space (inf
->pspace
);
1231 set_current_inferior (inf
);
1233 inferior_ptid
= thread
->ptid
;
1236 /* See gdbthread.h. */
1239 switch_to_no_thread ()
1241 if (inferior_ptid
== null_ptid
)
1244 inferior_ptid
= null_ptid
;
1245 reinit_frame_cache ();
1248 /* See gdbthread.h. */
1251 switch_to_thread (thread_info
*thr
)
1253 gdb_assert (thr
!= NULL
);
1255 if (inferior_ptid
== thr
->ptid
)
1258 switch_to_thread_no_regs (thr
);
1260 reinit_frame_cache ();
1263 /* See common/common-gdbthread.h. */
1266 switch_to_thread (ptid_t ptid
)
1268 thread_info
*thr
= find_thread_ptid (ptid
);
1269 switch_to_thread (thr
);
1273 restore_selected_frame (struct frame_id a_frame_id
, int frame_level
)
1275 struct frame_info
*frame
= NULL
;
1278 /* This means there was no selected frame. */
1279 if (frame_level
== -1)
1281 select_frame (NULL
);
1285 gdb_assert (frame_level
>= 0);
1287 /* Restore by level first, check if the frame id is the same as
1288 expected. If that fails, try restoring by frame id. If that
1289 fails, nothing to do, just warn the user. */
1291 count
= frame_level
;
1292 frame
= find_relative_frame (get_current_frame (), &count
);
1295 /* The frame ids must match - either both valid or both outer_frame_id.
1296 The latter case is not failsafe, but since it's highly unlikely
1297 the search by level finds the wrong frame, it's 99.9(9)% of
1298 the time (for all practical purposes) safe. */
1299 && frame_id_eq (get_frame_id (frame
), a_frame_id
))
1301 /* Cool, all is fine. */
1302 select_frame (frame
);
1306 frame
= frame_find_by_id (a_frame_id
);
1309 /* Cool, refound it. */
1310 select_frame (frame
);
1314 /* Nothing else to do, the frame layout really changed. Select the
1315 innermost stack frame. */
1316 select_frame (get_current_frame ());
1318 /* Warn the user. */
1319 if (frame_level
> 0 && !current_uiout
->is_mi_like_p ())
1321 warning (_("Couldn't restore frame #%d in "
1322 "current thread. Bottom (innermost) frame selected:"),
1324 /* For MI, we should probably have a notification about
1325 current frame change. But this error is not very
1326 likely, so don't bother for now. */
1327 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
1331 scoped_restore_current_thread::~scoped_restore_current_thread ()
1333 /* If an entry of thread_info was previously selected, it won't be
1334 deleted because we've increased its refcount. The thread represented
1335 by this thread_info entry may have already exited (due to normal exit,
1336 detach, etc), so the thread_info.state is THREAD_EXITED. */
1337 if (m_thread
!= NULL
1338 /* If the previously selected thread belonged to a process that has
1339 in the mean time exited (or killed, detached, etc.), then don't revert
1340 back to it, but instead simply drop back to no thread selected. */
1342 switch_to_thread (m_thread
);
1345 switch_to_no_thread ();
1346 set_current_inferior (m_inf
);
1349 /* The running state of the originally selected thread may have
1350 changed, so we have to recheck it here. */
1351 if (inferior_ptid
!= null_ptid
1353 && m_thread
->state
== THREAD_STOPPED
1354 && target_has_registers
1356 && target_has_memory
)
1357 restore_selected_frame (m_selected_frame_id
, m_selected_frame_level
);
1359 if (m_thread
!= NULL
)
1360 m_thread
->decref ();
1364 scoped_restore_current_thread::scoped_restore_current_thread ()
1367 m_inf
= current_inferior ();
1369 if (inferior_ptid
!= null_ptid
)
1371 thread_info
*tp
= inferior_thread ();
1372 struct frame_info
*frame
;
1374 m_was_stopped
= tp
->state
== THREAD_STOPPED
;
1376 && target_has_registers
1378 && target_has_memory
)
1380 /* When processing internal events, there might not be a
1381 selected frame. If we naively call get_selected_frame
1382 here, then we can end up reading debuginfo for the
1383 current frame, but we don't generally need the debuginfo
1385 frame
= get_selected_frame_if_set ();
1390 m_selected_frame_id
= get_frame_id (frame
);
1391 m_selected_frame_level
= frame_relative_level (frame
);
1400 /* See gdbthread.h. */
1403 show_thread_that_caused_stop (void)
1405 return highest_thread_num
> 1;
1408 /* See gdbthread.h. */
1411 show_inferior_qualified_tids (void)
1413 return (inferior_list
->next
!= NULL
|| inferior_list
->num
!= 1);
1416 /* See gdbthread.h. */
1419 print_thread_id (struct thread_info
*thr
)
1421 char *s
= get_print_cell ();
1423 if (show_inferior_qualified_tids ())
1424 xsnprintf (s
, PRINT_CELL_SIZE
, "%d.%d", thr
->inf
->num
, thr
->per_inf_num
);
1426 xsnprintf (s
, PRINT_CELL_SIZE
, "%d", thr
->per_inf_num
);
1430 /* Sort an array of struct thread_info pointers by thread ID (first by
1431 inferior number, and then by per-inferior thread number). Sorts in
1435 tp_array_compar_ascending (const thread_info
*a
, const thread_info
*b
)
1437 if (a
->inf
->num
!= b
->inf
->num
)
1438 return a
->inf
->num
< b
->inf
->num
;
1440 return (a
->per_inf_num
< b
->per_inf_num
);
1443 /* Sort an array of struct thread_info pointers by thread ID (first by
1444 inferior number, and then by per-inferior thread number). Sorts in
1445 descending order. */
1448 tp_array_compar_descending (const thread_info
*a
, const thread_info
*b
)
1450 if (a
->inf
->num
!= b
->inf
->num
)
1451 return a
->inf
->num
> b
->inf
->num
;
1453 return (a
->per_inf_num
> b
->per_inf_num
);
1456 /* Switch to thread THR and execute CMD.
1457 FLAGS.QUIET controls the printing of the thread information.
1458 FLAGS.CONT and FLAGS.SILENT control how to handle errors. */
1461 thr_try_catch_cmd (thread_info
*thr
, const char *cmd
, int from_tty
,
1462 const qcs_flags
&flags
)
1464 switch_to_thread (thr
);
1467 std::string cmd_result
= execute_command_to_string
1468 (cmd
, from_tty
, gdb_stdout
->term_out ());
1469 if (!flags
.silent
|| cmd_result
.length () > 0)
1472 printf_filtered (_("\nThread %s (%s):\n"),
1473 print_thread_id (thr
),
1474 target_pid_to_str (inferior_ptid
).c_str ());
1475 printf_filtered ("%s", cmd_result
.c_str ());
1478 catch (const gdb_exception_error
&ex
)
1483 printf_filtered (_("\nThread %s (%s):\n"),
1484 print_thread_id (thr
),
1485 target_pid_to_str (inferior_ptid
).c_str ());
1487 printf_filtered ("%s\n", ex
.what ());
1494 /* Option definition of "thread apply"'s "-ascending" option. */
1496 static const gdb::option::flag_option_def
<> ascending_option_def
= {
1499 Call COMMAND for all threads in ascending order.\n\
1500 The default is descending order."),
1503 /* The qcs command line flags for the "thread apply" commands. Keep
1504 this in sync with the "frame apply" commands. */
1506 using qcs_flag_option_def
1507 = gdb::option::flag_option_def
<qcs_flags
>;
1509 static const gdb::option::option_def thr_qcs_flags_option_defs
[] = {
1510 qcs_flag_option_def
{
1511 "q", [] (qcs_flags
*opt
) { return &opt
->quiet
; },
1512 N_("Disables printing the thread information."),
1515 qcs_flag_option_def
{
1516 "c", [] (qcs_flags
*opt
) { return &opt
->cont
; },
1517 N_("Print any error raised by COMMAND and continue."),
1520 qcs_flag_option_def
{
1521 "s", [] (qcs_flags
*opt
) { return &opt
->silent
; },
1522 N_("Silently ignore any errors or empty output produced by COMMAND."),
1526 /* Create an option_def_group for the "thread apply all" options, with
1527 ASCENDING and FLAGS as context. */
1529 static inline std::array
<gdb::option::option_def_group
, 2>
1530 make_thread_apply_all_options_def_group (int *ascending
,
1534 { {ascending_option_def
.def ()}, ascending
},
1535 { {thr_qcs_flags_option_defs
}, flags
},
1539 /* Create an option_def_group for the "thread apply" options, with
1540 FLAGS as context. */
1542 static inline gdb::option::option_def_group
1543 make_thread_apply_options_def_group (qcs_flags
*flags
)
1545 return {{thr_qcs_flags_option_defs
}, flags
};
1548 /* Apply a GDB command to a list of threads. List syntax is a whitespace
1549 separated list of numbers, or ranges, or the keyword `all'. Ranges consist
1550 of two numbers separated by a hyphen. Examples:
1552 thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
1553 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
1554 thread apply all x/i $pc Apply x/i $pc cmd to all threads. */
1557 thread_apply_all_command (const char *cmd
, int from_tty
)
1559 int ascending
= false;
1562 auto group
= make_thread_apply_all_options_def_group (&ascending
,
1564 gdb::option::process_options
1565 (&cmd
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
);
1567 validate_flags_qcs ("thread apply all", &flags
);
1569 if (cmd
== NULL
|| *cmd
== '\000')
1570 error (_("Please specify a command at the end of 'thread apply all'"));
1572 update_thread_list ();
1574 int tc
= live_threads_count ();
1577 /* Save a copy of the thread list and increment each thread's
1578 refcount while executing the command in the context of each
1579 thread, in case the command is one that wipes threads. E.g.,
1580 detach, kill, disconnect, etc., or even normally continuing
1581 over an inferior or thread exit. */
1582 std::vector
<thread_info
*> thr_list_cpy
;
1583 thr_list_cpy
.reserve (tc
);
1585 for (thread_info
*tp
: all_non_exited_threads ())
1586 thr_list_cpy
.push_back (tp
);
1587 gdb_assert (thr_list_cpy
.size () == tc
);
1589 /* Increment the refcounts, and restore them back on scope
1591 scoped_inc_dec_ref
inc_dec_ref (thr_list_cpy
);
1593 auto *sorter
= (ascending
1594 ? tp_array_compar_ascending
1595 : tp_array_compar_descending
);
1596 std::sort (thr_list_cpy
.begin (), thr_list_cpy
.end (), sorter
);
1598 scoped_restore_current_thread restore_thread
;
1600 for (thread_info
*thr
: thr_list_cpy
)
1601 if (thread_alive (thr
))
1602 thr_try_catch_cmd (thr
, cmd
, from_tty
, flags
);
1606 /* Completer for "thread apply [ID list]". */
1609 thread_apply_command_completer (cmd_list_element
*ignore
,
1610 completion_tracker
&tracker
,
1611 const char *text
, const char * /*word*/)
1613 /* Don't leave this to complete_options because there's an early
1615 tracker
.set_use_custom_word_point (true);
1617 tid_range_parser parser
;
1618 parser
.init (text
, current_inferior ()->num
);
1622 while (!parser
.finished ())
1624 int inf_num
, thr_start
, thr_end
;
1626 if (!parser
.get_tid_range (&inf_num
, &thr_start
, &thr_end
))
1629 if (parser
.in_star_range () || parser
.in_thread_range ())
1630 parser
.skip_range ();
1633 catch (const gdb_exception_error
&ex
)
1635 /* get_tid_range throws if it parses a negative number, for
1636 example. But a seemingly negative number may be the start of
1637 an option instead. */
1640 const char *cmd
= parser
.cur_tok ();
1644 /* No thread ID list yet. */
1648 /* Check if we're past a valid thread ID list already. */
1649 if (parser
.finished ()
1650 && cmd
> text
&& !isspace (cmd
[-1]))
1653 /* We're past the thread ID list, advance word point. */
1654 tracker
.advance_custom_word_point_by (cmd
- text
);
1657 const auto group
= make_thread_apply_options_def_group (nullptr);
1658 if (gdb::option::complete_options
1659 (tracker
, &text
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
))
1662 complete_nested_command_line (tracker
, text
);
1665 /* Completer for "thread apply all". */
1668 thread_apply_all_command_completer (cmd_list_element
*ignore
,
1669 completion_tracker
&tracker
,
1670 const char *text
, const char *word
)
1672 const auto group
= make_thread_apply_all_options_def_group (nullptr,
1674 if (gdb::option::complete_options
1675 (tracker
, &text
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
))
1678 complete_nested_command_line (tracker
, text
);
1681 /* Implementation of the "thread apply" command. */
1684 thread_apply_command (const char *tidlist
, int from_tty
)
1687 const char *cmd
= NULL
;
1688 tid_range_parser parser
;
1690 if (tidlist
== NULL
|| *tidlist
== '\000')
1691 error (_("Please specify a thread ID list"));
1693 parser
.init (tidlist
, current_inferior ()->num
);
1694 while (!parser
.finished ())
1696 int inf_num
, thr_start
, thr_end
;
1698 if (!parser
.get_tid_range (&inf_num
, &thr_start
, &thr_end
))
1702 cmd
= parser
.cur_tok ();
1704 auto group
= make_thread_apply_options_def_group (&flags
);
1705 gdb::option::process_options
1706 (&cmd
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
);
1708 validate_flags_qcs ("thread apply", &flags
);
1711 error (_("Please specify a command following the thread ID list"));
1713 if (tidlist
== cmd
|| isdigit (cmd
[0]))
1714 invalid_thread_id_error (cmd
);
1716 scoped_restore_current_thread restore_thread
;
1718 parser
.init (tidlist
, current_inferior ()->num
);
1719 while (!parser
.finished ())
1721 struct thread_info
*tp
= NULL
;
1722 struct inferior
*inf
;
1723 int inf_num
, thr_num
;
1725 parser
.get_tid (&inf_num
, &thr_num
);
1726 inf
= find_inferior_id (inf_num
);
1728 tp
= find_thread_id (inf
, thr_num
);
1730 if (parser
.in_star_range ())
1734 warning (_("Unknown inferior %d"), inf_num
);
1735 parser
.skip_range ();
1739 /* No use looking for threads past the highest thread number
1740 the inferior ever had. */
1741 if (thr_num
>= inf
->highest_thread_num
)
1742 parser
.skip_range ();
1744 /* Be quiet about unknown threads numbers. */
1751 if (show_inferior_qualified_tids () || parser
.tid_is_qualified ())
1752 warning (_("Unknown thread %d.%d"), inf_num
, thr_num
);
1754 warning (_("Unknown thread %d"), thr_num
);
1758 if (!thread_alive (tp
))
1760 warning (_("Thread %s has terminated."), print_thread_id (tp
));
1764 thr_try_catch_cmd (tp
, cmd
, from_tty
, flags
);
1769 /* Implementation of the "taas" command. */
1772 taas_command (const char *cmd
, int from_tty
)
1774 std::string expanded
= std::string ("thread apply all -s ") + cmd
;
1775 execute_command (expanded
.c_str (), from_tty
);
1778 /* Implementation of the "tfaas" command. */
1781 tfaas_command (const char *cmd
, int from_tty
)
1783 std::string expanded
1784 = std::string ("thread apply all -s -- frame apply all -s ") + cmd
;
1785 execute_command (expanded
.c_str (), from_tty
);
1788 /* Switch to the specified thread, or print the current thread. */
1791 thread_command (const char *tidstr
, int from_tty
)
1795 if (inferior_ptid
== null_ptid
)
1796 error (_("No thread selected"));
1798 if (target_has_stack
)
1800 struct thread_info
*tp
= inferior_thread ();
1802 if (tp
->state
== THREAD_EXITED
)
1803 printf_filtered (_("[Current thread is %s (%s) (exited)]\n"),
1804 print_thread_id (tp
),
1805 target_pid_to_str (inferior_ptid
).c_str ());
1807 printf_filtered (_("[Current thread is %s (%s)]\n"),
1808 print_thread_id (tp
),
1809 target_pid_to_str (inferior_ptid
).c_str ());
1812 error (_("No stack."));
1816 ptid_t previous_ptid
= inferior_ptid
;
1818 thread_select (tidstr
, parse_thread_id (tidstr
, NULL
));
1820 /* Print if the thread has not changed, otherwise an event will
1822 if (inferior_ptid
== previous_ptid
)
1824 print_selected_thread_frame (current_uiout
,
1825 USER_SELECTED_THREAD
1826 | USER_SELECTED_FRAME
);
1830 gdb::observers::user_selected_context_changed
.notify
1831 (USER_SELECTED_THREAD
| USER_SELECTED_FRAME
);
1836 /* Implementation of `thread name'. */
1839 thread_name_command (const char *arg
, int from_tty
)
1841 struct thread_info
*info
;
1843 if (inferior_ptid
== null_ptid
)
1844 error (_("No thread selected"));
1846 arg
= skip_spaces (arg
);
1848 info
= inferior_thread ();
1850 info
->name
= arg
? xstrdup (arg
) : NULL
;
1853 /* Find thread ids with a name, target pid, or extra info matching ARG. */
1856 thread_find_command (const char *arg
, int from_tty
)
1859 unsigned long match
= 0;
1861 if (arg
== NULL
|| *arg
== '\0')
1862 error (_("Command requires an argument."));
1864 tmp
= re_comp (arg
);
1866 error (_("Invalid regexp (%s): %s"), tmp
, arg
);
1868 update_thread_list ();
1869 for (thread_info
*tp
: all_threads ())
1871 if (tp
->name
!= NULL
&& re_exec (tp
->name
))
1873 printf_filtered (_("Thread %s has name '%s'\n"),
1874 print_thread_id (tp
), tp
->name
);
1878 tmp
= target_thread_name (tp
);
1879 if (tmp
!= NULL
&& re_exec (tmp
))
1881 printf_filtered (_("Thread %s has target name '%s'\n"),
1882 print_thread_id (tp
), tmp
);
1886 std::string name
= target_pid_to_str (tp
->ptid
);
1887 if (!name
.empty () && re_exec (name
.c_str ()))
1889 printf_filtered (_("Thread %s has target id '%s'\n"),
1890 print_thread_id (tp
), name
.c_str ());
1894 tmp
= target_extra_thread_info (tp
);
1895 if (tmp
!= NULL
&& re_exec (tmp
))
1897 printf_filtered (_("Thread %s has extra info '%s'\n"),
1898 print_thread_id (tp
), tmp
);
1903 printf_filtered (_("No threads match '%s'\n"), arg
);
1906 /* Print notices when new threads are attached and detached. */
1907 int print_thread_events
= 1;
1909 show_print_thread_events (struct ui_file
*file
, int from_tty
,
1910 struct cmd_list_element
*c
, const char *value
)
1912 fprintf_filtered (file
,
1913 _("Printing of thread events is %s.\n"),
1917 /* See gdbthread.h. */
1920 thread_select (const char *tidstr
, thread_info
*tp
)
1922 if (!thread_alive (tp
))
1923 error (_("Thread ID %s has terminated."), tidstr
);
1925 switch_to_thread (tp
);
1927 annotate_thread_changed ();
1929 /* Since the current thread may have changed, see if there is any
1930 exited thread we can now delete. */
1934 /* Print thread and frame switch command response. */
1937 print_selected_thread_frame (struct ui_out
*uiout
,
1938 user_selected_what selection
)
1940 struct thread_info
*tp
= inferior_thread ();
1942 if (selection
& USER_SELECTED_THREAD
)
1944 if (uiout
->is_mi_like_p ())
1946 uiout
->field_int ("new-thread-id",
1947 inferior_thread ()->global_num
);
1951 uiout
->text ("[Switching to thread ");
1952 uiout
->field_string ("new-thread-id", print_thread_id (tp
));
1954 uiout
->text (target_pid_to_str (inferior_ptid
).c_str ());
1959 if (tp
->state
== THREAD_RUNNING
)
1961 if (selection
& USER_SELECTED_THREAD
)
1962 uiout
->text ("(running)\n");
1964 else if (selection
& USER_SELECTED_FRAME
)
1966 if (selection
& USER_SELECTED_THREAD
)
1969 if (has_stack_frames ())
1970 print_stack_frame_to_uiout (uiout
, get_selected_frame (NULL
),
1975 /* Update the 'threads_executing' global based on the threads we know
1979 update_threads_executing (void)
1981 threads_executing
= 0;
1982 for (thread_info
*tp
: all_non_exited_threads ())
1986 threads_executing
= 1;
1993 update_thread_list (void)
1995 target_update_thread_list ();
1996 update_threads_executing ();
1999 /* Return a new value for the selected thread's id. Return a value of
2000 0 if no thread is selected. If GLOBAL is true, return the thread's
2001 global number. Otherwise return the per-inferior number. */
2003 static struct value
*
2004 thread_num_make_value_helper (struct gdbarch
*gdbarch
, int global
)
2008 if (inferior_ptid
== null_ptid
)
2012 thread_info
*tp
= inferior_thread ();
2014 int_val
= tp
->global_num
;
2016 int_val
= tp
->per_inf_num
;
2019 return value_from_longest (builtin_type (gdbarch
)->builtin_int
, int_val
);
2022 /* Return a new value for the selected thread's per-inferior thread
2023 number. Return a value of 0 if no thread is selected, or no
2026 static struct value
*
2027 thread_id_per_inf_num_make_value (struct gdbarch
*gdbarch
,
2028 struct internalvar
*var
,
2031 return thread_num_make_value_helper (gdbarch
, 0);
2034 /* Return a new value for the selected thread's global id. Return a
2035 value of 0 if no thread is selected, or no threads exist. */
2037 static struct value
*
2038 global_thread_id_make_value (struct gdbarch
*gdbarch
, struct internalvar
*var
,
2041 return thread_num_make_value_helper (gdbarch
, 1);
2044 /* Commands with a prefix of `thread'. */
2045 struct cmd_list_element
*thread_cmd_list
= NULL
;
2047 /* Implementation of `thread' variable. */
2049 static const struct internalvar_funcs thread_funcs
=
2051 thread_id_per_inf_num_make_value
,
2056 /* Implementation of `gthread' variable. */
2058 static const struct internalvar_funcs gthread_funcs
=
2060 global_thread_id_make_value
,
2066 _initialize_thread (void)
2068 static struct cmd_list_element
*thread_apply_list
= NULL
;
2069 cmd_list_element
*c
;
2071 add_info ("threads", info_threads_command
,
2072 _("Display currently known threads.\n\
2073 Usage: info threads [-gid] [ID]...\n\
2074 -gid: Show global thread IDs.\n\
2075 If ID is given, it is a space-separated list of IDs of threads to display.\n\
2076 Otherwise, all threads are displayed."));
2078 add_prefix_cmd ("thread", class_run
, thread_command
, _("\
2079 Use this command to switch between threads.\n\
2080 The new thread ID must be currently known."),
2081 &thread_cmd_list
, "thread ", 1, &cmdlist
);
2083 #define THREAD_APPLY_OPTION_HELP "\
2084 Prints per-inferior thread number and target system's thread id\n\
2085 followed by COMMAND output.\n\
2087 By default, an error raised during the execution of COMMAND\n\
2088 aborts \"thread apply\".\n\
2093 const auto thread_apply_opts
= make_thread_apply_options_def_group (nullptr);
2095 static std::string thread_apply_help
= gdb::option::build_help (N_("\
2096 Apply a command to a list of threads.\n\
2097 Usage: thread apply ID... [OPTION]... COMMAND\n\
2098 ID is a space-separated list of IDs of threads to apply COMMAND on.\n"
2099 THREAD_APPLY_OPTION_HELP
),
2102 c
= add_prefix_cmd ("apply", class_run
, thread_apply_command
,
2103 thread_apply_help
.c_str (),
2104 &thread_apply_list
, "thread apply ", 1,
2106 set_cmd_completer_handle_brkchars (c
, thread_apply_command_completer
);
2108 const auto thread_apply_all_opts
2109 = make_thread_apply_all_options_def_group (nullptr, nullptr);
2111 static std::string thread_apply_all_help
= gdb::option::build_help (N_("\
2112 Apply a command to all threads.\n\
2114 Usage: thread apply all [OPTION]... COMMAND\n"
2115 THREAD_APPLY_OPTION_HELP
),
2116 thread_apply_all_opts
);
2118 c
= add_cmd ("all", class_run
, thread_apply_all_command
,
2119 thread_apply_all_help
.c_str (),
2120 &thread_apply_list
);
2121 set_cmd_completer_handle_brkchars (c
, thread_apply_all_command_completer
);
2123 c
= add_com ("taas", class_run
, taas_command
, _("\
2124 Apply a command to all threads (ignoring errors and empty output).\n\
2125 Usage: taas [OPTION]... COMMAND\n\
2126 shortcut for 'thread apply all -s [OPTION]... COMMAND'\n\
2127 See \"help thread apply all\" for available options."));
2128 set_cmd_completer_handle_brkchars (c
, thread_apply_all_command_completer
);
2130 c
= add_com ("tfaas", class_run
, tfaas_command
, _("\
2131 Apply a command to all frames of all threads (ignoring errors and empty output).\n\
2132 Usage: tfaas [OPTION]... COMMAND\n\
2133 shortcut for 'thread apply all -s -- frame apply all -s [OPTION]... COMMAND'\n\
2134 See \"help frame apply all\" for available options."));
2135 set_cmd_completer_handle_brkchars (c
, frame_apply_all_cmd_completer
);
2137 add_cmd ("name", class_run
, thread_name_command
,
2138 _("Set the current thread's name.\n\
2139 Usage: thread name [NAME]\n\
2140 If NAME is not given, then any existing name is removed."), &thread_cmd_list
);
2142 add_cmd ("find", class_run
, thread_find_command
, _("\
2143 Find threads that match a regular expression.\n\
2144 Usage: thread find REGEXP\n\
2145 Will display thread ids whose name, target ID, or extra info matches REGEXP."),
2148 add_com_alias ("t", "thread", class_run
, 1);
2150 add_setshow_boolean_cmd ("thread-events", no_class
,
2151 &print_thread_events
, _("\
2152 Set printing of thread events (such as thread start and exit)."), _("\
2153 Show printing of thread events (such as thread start and exit)."), NULL
,
2155 show_print_thread_events
,
2156 &setprintlist
, &showprintlist
);
2158 create_internalvar_type_lazy ("_thread", &thread_funcs
, NULL
);
2159 create_internalvar_type_lazy ("_gthread", >hread_funcs
, NULL
);