mirror of
https://sourceware.org/git/binutils-gdb.git
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94cc34afe2
* infrun.c (resume): In non-stop mode, always resume just one thread. (proceed): Don't call prepare_to_proceed in non-stop mode. (fetch_inferior_event): In non-stop mode, switch context before handling the event. (error_is_running, ensure_not_running): New. (handle_inferior_event): In non-stop mode: Mark only the event thread as stopped. Require that the target module manages adding threads to the thread list. Assert that there isn't a deferred_step_ptid set. Don't switch to infwait_thread_hop_state. (normal_stop): Only mark not-running if inferior hasn't exited. In non-stop mode, only mark the event thread. * thread.c:Include "cli/cli-decode.h". (print_thread_info): Don't read from a running thread. Output "(running)" if thread is running. (switch_to_thread): Don't read stop_pc if thread is executing. (do_restore_current_thread_cleanup): Don't write to a running thread. (thread_apply_all_command): Don't read from a running thread. In non-stop mode, do a full context-switch instead of just switching threads. (thread_apply_command): In non-stop mode, do a full context-switch instead of just switching threads. (do_captured_thread_select): Likewise. Inform user if selected thread is running. (_initialize_thread): Mark "info threads" and "thread" and async_ok. * inf-loop.c (inferior_event_handler): In non-stop mode, don't unregister the target from the event loop. * infcmd.c (continue_command, step_1, jump_command) (signal_command): Ensure the selected thread isn't running. (interrupt_target_command): In non-stop mode, interrupt only the selected thread. * inferior.h (error_is_running, ensure_not_running): Declare. * target.h (struct target_ops): Add ptid argument to the to_stop member. (target_stop): Add ptid_t argument. * target.c (update_current_target): Add ptid argument to to_stop's type. (debug_to_stop): Add ptid_t argument. (debug_to_rcmd): Set to_stop_ptid. * remote.c (remote_stop): Add ptid_t argument. (async_remote_interrupt): Add inferior_ptid to target_stop. * inf-ptrace.c (inf_ptrace_stop): Add ptid argument. * Makefile.in (thread.o): Depend on $(cli_decode_h).
1080 lines
27 KiB
C
1080 lines
27 KiB
C
/* Multi-process/thread control for GDB, the GNU debugger.
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Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
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Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "symtab.h"
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#include "frame.h"
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#include "inferior.h"
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#include "environ.h"
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#include "value.h"
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#include "target.h"
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#include "gdbthread.h"
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#include "exceptions.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "regcache.h"
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#include "gdb.h"
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#include "gdb_string.h"
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#include <ctype.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "ui-out.h"
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#include "observer.h"
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#include "annotate.h"
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#include "cli/cli-decode.h"
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/* Definition of struct thread_info exported to gdbthread.h */
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/* Prototypes for exported functions. */
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void _initialize_thread (void);
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/* Prototypes for local functions. */
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static struct thread_info *thread_list = NULL;
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static int highest_thread_num;
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static struct thread_info *find_thread_id (int num);
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static void thread_command (char *tidstr, int from_tty);
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static void thread_apply_all_command (char *, int);
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static int thread_alive (struct thread_info *);
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static void info_threads_command (char *, int);
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static void thread_apply_command (char *, int);
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static void restore_current_thread (ptid_t);
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static void prune_threads (void);
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static int main_thread_running = 0;
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static int main_thread_executing = 0;
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void
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delete_step_resume_breakpoint (void *arg)
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{
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struct breakpoint **breakpointp = (struct breakpoint **) arg;
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struct thread_info *tp;
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if (*breakpointp != NULL)
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{
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delete_breakpoint (*breakpointp);
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->step_resume_breakpoint == *breakpointp)
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tp->step_resume_breakpoint = NULL;
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*breakpointp = NULL;
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}
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}
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static void
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free_thread (struct thread_info *tp)
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{
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/* NOTE: this will take care of any left-over step_resume breakpoints,
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but not any user-specified thread-specific breakpoints. We can not
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delete the breakpoint straight-off, because the inferior might not
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be stopped at the moment. */
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if (tp->step_resume_breakpoint)
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tp->step_resume_breakpoint->disposition = disp_del_at_next_stop;
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bpstat_clear (&tp->stop_bpstat);
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/* FIXME: do I ever need to call the back-end to give it a
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chance at this private data before deleting the thread? */
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if (tp->private)
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xfree (tp->private);
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xfree (tp);
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}
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void
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init_thread_list (void)
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{
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struct thread_info *tp, *tpnext;
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highest_thread_num = 0;
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main_thread_running = 0;
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main_thread_executing = 0;
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if (!thread_list)
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return;
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for (tp = thread_list; tp; tp = tpnext)
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{
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tpnext = tp->next;
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free_thread (tp);
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}
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thread_list = NULL;
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}
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struct thread_info *
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add_thread_silent (ptid_t ptid)
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{
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struct thread_info *tp;
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tp = (struct thread_info *) xmalloc (sizeof (*tp));
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memset (tp, 0, sizeof (*tp));
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tp->ptid = ptid;
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tp->num = ++highest_thread_num;
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tp->next = thread_list;
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thread_list = tp;
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observer_notify_new_thread (tp);
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return tp;
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}
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struct thread_info *
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add_thread_with_info (ptid_t ptid, struct private_thread_info *private)
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{
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struct thread_info *result = add_thread_silent (ptid);
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result->private = private;
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if (print_thread_events)
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printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid));
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annotate_new_thread ();
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return result;
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}
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struct thread_info *
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add_thread (ptid_t ptid)
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{
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return add_thread_with_info (ptid, NULL);
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}
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/* Delete thread PTID. If SILENT, don't notify the observer of this
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exit. */
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static void
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delete_thread_1 (ptid_t ptid, int silent)
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{
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struct thread_info *tp, *tpprev;
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tpprev = NULL;
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for (tp = thread_list; tp; tpprev = tp, tp = tp->next)
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if (ptid_equal (tp->ptid, ptid))
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break;
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if (!tp)
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return;
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if (tpprev)
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tpprev->next = tp->next;
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else
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thread_list = tp->next;
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if (!silent)
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observer_notify_thread_exit (tp);
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free_thread (tp);
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}
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void
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delete_thread (ptid_t ptid)
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{
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delete_thread_1 (ptid, 0 /* not silent */);
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}
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void
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delete_thread_silent (ptid_t ptid)
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{
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delete_thread_1 (ptid, 1 /* silent */);
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}
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static struct thread_info *
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find_thread_id (int num)
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->num == num)
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return tp;
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return NULL;
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}
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/* Find a thread_info by matching PTID. */
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struct thread_info *
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find_thread_pid (ptid_t ptid)
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (ptid_equal (tp->ptid, ptid))
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return tp;
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return NULL;
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}
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/*
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* Thread iterator function.
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*
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* Calls a callback function once for each thread, so long as
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* the callback function returns false. If the callback function
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* returns true, the iteration will end and the current thread
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* will be returned. This can be useful for implementing a
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* search for a thread with arbitrary attributes, or for applying
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* some operation to every thread.
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*
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* FIXME: some of the existing functionality, such as
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* "Thread apply all", might be rewritten using this functionality.
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*/
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struct thread_info *
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iterate_over_threads (int (*callback) (struct thread_info *, void *),
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void *data)
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if ((*callback) (tp, data))
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return tp;
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return NULL;
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}
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int
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thread_count (void)
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{
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int result = 0;
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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++result;
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return result;
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}
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int
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valid_thread_id (int num)
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (tp->num == num)
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return 1;
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return 0;
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}
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int
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pid_to_thread_id (ptid_t ptid)
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (ptid_equal (tp->ptid, ptid))
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return tp->num;
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return 0;
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}
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ptid_t
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thread_id_to_pid (int num)
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{
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struct thread_info *thread = find_thread_id (num);
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if (thread)
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return thread->ptid;
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else
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return pid_to_ptid (-1);
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}
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int
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in_thread_list (ptid_t ptid)
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{
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struct thread_info *tp;
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for (tp = thread_list; tp; tp = tp->next)
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if (ptid_equal (tp->ptid, ptid))
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return 1;
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return 0; /* Never heard of 'im */
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}
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/* Print a list of thread ids currently known, and the total number of
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threads. To be used from within catch_errors. */
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static int
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do_captured_list_thread_ids (struct ui_out *uiout, void *arg)
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{
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struct thread_info *tp;
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int num = 0;
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struct cleanup *cleanup_chain;
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prune_threads ();
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target_find_new_threads ();
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cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids");
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for (tp = thread_list; tp; tp = tp->next)
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{
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num++;
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ui_out_field_int (uiout, "thread-id", tp->num);
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}
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do_cleanups (cleanup_chain);
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ui_out_field_int (uiout, "number-of-threads", num);
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return GDB_RC_OK;
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}
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/* Official gdblib interface function to get a list of thread ids and
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the total number. */
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enum gdb_rc
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gdb_list_thread_ids (struct ui_out *uiout, char **error_message)
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{
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if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL,
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error_message, RETURN_MASK_ALL) < 0)
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return GDB_RC_FAIL;
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return GDB_RC_OK;
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}
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/* Load infrun state for the thread PID. */
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void
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load_infrun_state (ptid_t ptid,
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CORE_ADDR *prev_pc,
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int *trap_expected,
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struct breakpoint **step_resume_breakpoint,
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CORE_ADDR *step_range_start,
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CORE_ADDR *step_range_end,
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struct frame_id *step_frame_id,
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int *stepping_over_breakpoint,
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int *stepping_through_solib_after_catch,
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bpstat *stepping_through_solib_catchpoints,
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int *current_line,
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struct symtab **current_symtab,
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struct continuation **continuations,
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struct continuation **intermediate_continuations,
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int *proceed_to_finish,
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enum step_over_calls_kind *step_over_calls,
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int *stop_step,
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int *step_multi,
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enum target_signal *stop_signal,
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bpstat *stop_bpstat)
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{
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struct thread_info *tp;
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/* If we can't find the thread, then we're debugging a single threaded
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process. No need to do anything in that case. */
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tp = find_thread_id (pid_to_thread_id (ptid));
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if (tp == NULL)
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return;
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*prev_pc = tp->prev_pc;
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*trap_expected = tp->trap_expected;
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*step_resume_breakpoint = tp->step_resume_breakpoint;
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*step_range_start = tp->step_range_start;
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*step_range_end = tp->step_range_end;
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*step_frame_id = tp->step_frame_id;
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*stepping_over_breakpoint = tp->stepping_over_breakpoint;
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*stepping_through_solib_after_catch =
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tp->stepping_through_solib_after_catch;
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*stepping_through_solib_catchpoints =
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tp->stepping_through_solib_catchpoints;
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*current_line = tp->current_line;
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*current_symtab = tp->current_symtab;
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/* In all-stop mode, these are global state, while in non-stop mode,
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they are per thread. */
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if (non_stop)
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{
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*continuations = tp->continuations;
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tp->continuations = NULL;
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*intermediate_continuations = tp->intermediate_continuations;
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tp->intermediate_continuations = NULL;
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*proceed_to_finish = tp->proceed_to_finish;
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*step_over_calls = tp->step_over_calls;
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*stop_step = tp->stop_step;
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*step_multi = tp->step_multi;
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*stop_signal = tp->stop_signal;
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/* Swap instead of copy, so we only have to update one of
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them. */
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*stop_bpstat = tp->stop_bpstat;
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tp->stop_bpstat = 0;
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}
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}
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/* Save infrun state for the thread PID. */
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void
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save_infrun_state (ptid_t ptid,
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CORE_ADDR prev_pc,
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int trap_expected,
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struct breakpoint *step_resume_breakpoint,
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CORE_ADDR step_range_start,
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CORE_ADDR step_range_end,
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const struct frame_id *step_frame_id,
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int stepping_over_breakpoint,
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int stepping_through_solib_after_catch,
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bpstat stepping_through_solib_catchpoints,
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int current_line,
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struct symtab *current_symtab,
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struct continuation *continuations,
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struct continuation *intermediate_continuations,
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int proceed_to_finish,
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enum step_over_calls_kind step_over_calls,
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int stop_step,
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int step_multi,
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enum target_signal stop_signal,
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bpstat stop_bpstat)
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{
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struct thread_info *tp;
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/* If we can't find the thread, then we're debugging a single-threaded
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process. Nothing to do in that case. */
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tp = find_thread_id (pid_to_thread_id (ptid));
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if (tp == NULL)
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return;
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tp->prev_pc = prev_pc;
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tp->trap_expected = trap_expected;
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tp->step_resume_breakpoint = step_resume_breakpoint;
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tp->step_range_start = step_range_start;
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tp->step_range_end = step_range_end;
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tp->step_frame_id = (*step_frame_id);
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tp->stepping_over_breakpoint = stepping_over_breakpoint;
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tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch;
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tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints;
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tp->current_line = current_line;
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tp->current_symtab = current_symtab;
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/* In all-stop mode, these are global state, while in non-stop mode,
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they are per thread. */
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if (non_stop)
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{
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tp->continuations = continuations;
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tp->intermediate_continuations = intermediate_continuations;
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tp->proceed_to_finish = proceed_to_finish;
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tp->step_over_calls = step_over_calls;
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tp->stop_step = stop_step;
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tp->step_multi = step_multi;
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tp->stop_signal = stop_signal;
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tp->stop_bpstat = stop_bpstat;
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}
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}
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/* Return true if TP is an active thread. */
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static int
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thread_alive (struct thread_info *tp)
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{
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if (PIDGET (tp->ptid) == -1)
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return 0;
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if (!target_thread_alive (tp->ptid))
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{
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tp->ptid = pid_to_ptid (-1); /* Mark it as dead */
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return 0;
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}
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return 1;
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}
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static void
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prune_threads (void)
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{
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struct thread_info *tp, *next;
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for (tp = thread_list; tp; tp = next)
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{
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next = tp->next;
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if (!thread_alive (tp))
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delete_thread (tp->ptid);
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}
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}
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void
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|
set_running (ptid_t ptid, int running)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
if (!thread_list)
|
|
{
|
|
/* This is one of the targets that does not add main
|
|
thread to the thread list. Just use a single
|
|
global flag to indicate that a thread is running.
|
|
|
|
This problem is unique to ST programs. For MT programs,
|
|
the main thread is always present in the thread list. If it's
|
|
not, the first call to context_switch will mess up GDB internal
|
|
state. */
|
|
if (running && !main_thread_running && !suppress_resume_observer)
|
|
observer_notify_target_resumed (ptid);
|
|
main_thread_running = running;
|
|
return;
|
|
}
|
|
|
|
/* We try not to notify the observer if no thread has actually changed
|
|
the running state -- merely to reduce the number of messages to
|
|
frontend. Frontend is supposed to handle multiple *running just fine. */
|
|
if (PIDGET (ptid) == -1)
|
|
{
|
|
int any_started = 0;
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
{
|
|
if (running && !tp->running_)
|
|
any_started = 1;
|
|
tp->running_ = running;
|
|
}
|
|
if (any_started && !suppress_resume_observer)
|
|
observer_notify_target_resumed (ptid);
|
|
}
|
|
else
|
|
{
|
|
tp = find_thread_pid (ptid);
|
|
gdb_assert (tp);
|
|
if (running && !tp->running_ && !suppress_resume_observer)
|
|
observer_notify_target_resumed (ptid);
|
|
tp->running_ = running;
|
|
}
|
|
}
|
|
|
|
int
|
|
is_running (ptid_t ptid)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
if (!target_has_execution)
|
|
return 0;
|
|
|
|
if (!thread_list)
|
|
return main_thread_running;
|
|
|
|
tp = find_thread_pid (ptid);
|
|
gdb_assert (tp);
|
|
return tp->running_;
|
|
}
|
|
|
|
int
|
|
any_running (void)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
if (!target_has_execution)
|
|
return 0;
|
|
|
|
if (!thread_list)
|
|
return main_thread_running;
|
|
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
if (tp->running_)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
is_executing (ptid_t ptid)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
if (!target_has_execution)
|
|
return 0;
|
|
|
|
if (!thread_list)
|
|
return main_thread_executing;
|
|
|
|
tp = find_thread_pid (ptid);
|
|
gdb_assert (tp);
|
|
return tp->executing_;
|
|
}
|
|
|
|
void
|
|
set_executing (ptid_t ptid, int executing)
|
|
{
|
|
struct thread_info *tp;
|
|
|
|
if (!thread_list)
|
|
{
|
|
/* This target does not add the main thread to the thread list.
|
|
Use a global flag to indicate that the thread is
|
|
executing. */
|
|
main_thread_executing = executing;
|
|
return;
|
|
}
|
|
|
|
if (PIDGET (ptid) == -1)
|
|
{
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
tp->executing_ = executing;
|
|
}
|
|
else
|
|
{
|
|
tp = find_thread_pid (ptid);
|
|
gdb_assert (tp);
|
|
tp->executing_ = executing;
|
|
}
|
|
}
|
|
|
|
/* Prints the list of threads and their details on UIOUT.
|
|
This is a version of 'info_thread_command' suitable for
|
|
use from MI.
|
|
If REQESTED_THREAD is not -1, it's the GDB id of the thread
|
|
that should be printed. Otherwise, all threads are
|
|
printed. */
|
|
void
|
|
print_thread_info (struct ui_out *uiout, int requested_thread)
|
|
{
|
|
struct thread_info *tp;
|
|
ptid_t current_ptid;
|
|
struct frame_info *cur_frame;
|
|
struct cleanup *old_chain;
|
|
struct frame_id saved_frame_id;
|
|
char *extra_info;
|
|
int current_thread = -1;
|
|
|
|
/* Backup current thread and selected frame. */
|
|
if (!is_running (inferior_ptid))
|
|
saved_frame_id = get_frame_id (get_selected_frame (NULL));
|
|
else
|
|
saved_frame_id = null_frame_id;
|
|
|
|
old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id);
|
|
make_cleanup_ui_out_list_begin_end (uiout, "threads");
|
|
|
|
prune_threads ();
|
|
target_find_new_threads ();
|
|
current_ptid = inferior_ptid;
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
{
|
|
struct cleanup *chain2;
|
|
|
|
if (requested_thread != -1 && tp->num != requested_thread)
|
|
continue;
|
|
|
|
chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
|
|
|
|
if (ptid_equal (tp->ptid, current_ptid))
|
|
{
|
|
current_thread = tp->num;
|
|
ui_out_text (uiout, "* ");
|
|
}
|
|
else
|
|
ui_out_text (uiout, " ");
|
|
|
|
ui_out_field_int (uiout, "id", tp->num);
|
|
ui_out_text (uiout, " ");
|
|
ui_out_field_string (uiout, "target-id", target_tid_to_str (tp->ptid));
|
|
|
|
extra_info = target_extra_thread_info (tp);
|
|
if (extra_info)
|
|
{
|
|
ui_out_text (uiout, " (");
|
|
ui_out_field_string (uiout, "details", extra_info);
|
|
ui_out_text (uiout, ")");
|
|
}
|
|
ui_out_text (uiout, " ");
|
|
if (tp->running_)
|
|
ui_out_text (uiout, "(running)\n");
|
|
else
|
|
{
|
|
/* The switch below puts us at the top of the stack (leaf
|
|
frame). */
|
|
switch_to_thread (tp->ptid);
|
|
print_stack_frame (get_selected_frame (NULL),
|
|
/* For MI output, print frame level. */
|
|
ui_out_is_mi_like_p (uiout),
|
|
LOCATION);
|
|
}
|
|
|
|
do_cleanups (chain2);
|
|
}
|
|
|
|
/* Restores the current thread and the frame selected before
|
|
the "info threads" command. */
|
|
do_cleanups (old_chain);
|
|
|
|
if (requested_thread == -1)
|
|
{
|
|
gdb_assert (current_thread != -1 || !thread_list);
|
|
if (current_thread != -1 && ui_out_is_mi_like_p (uiout))
|
|
ui_out_field_int (uiout, "current-thread-id", current_thread);
|
|
}
|
|
|
|
if (is_running (inferior_ptid))
|
|
return;
|
|
|
|
/* If case we were not able to find the original frame, print the
|
|
new selected frame. */
|
|
if (frame_find_by_id (saved_frame_id) == NULL)
|
|
{
|
|
warning (_("Couldn't restore frame in current thread, at frame 0"));
|
|
/* For MI, we should probably have a notification about
|
|
current frame change. But this error is not very likely, so
|
|
don't bother for now. */
|
|
if (!ui_out_is_mi_like_p (uiout))
|
|
print_stack_frame (get_selected_frame (NULL), 0, LOCATION);
|
|
}
|
|
}
|
|
|
|
|
|
/* Print information about currently known threads
|
|
|
|
* Note: this has the drawback that it _really_ switches
|
|
* threads, which frees the frame cache. A no-side
|
|
* effects info-threads command would be nicer.
|
|
*/
|
|
|
|
static void
|
|
info_threads_command (char *arg, int from_tty)
|
|
{
|
|
print_thread_info (uiout, -1);
|
|
}
|
|
|
|
/* Switch from one thread to another. */
|
|
|
|
void
|
|
switch_to_thread (ptid_t ptid)
|
|
{
|
|
if (ptid_equal (ptid, inferior_ptid))
|
|
return;
|
|
|
|
inferior_ptid = ptid;
|
|
reinit_frame_cache ();
|
|
registers_changed ();
|
|
|
|
if (!is_executing (ptid))
|
|
stop_pc = read_pc ();
|
|
else
|
|
stop_pc = ~(CORE_ADDR) 0;
|
|
}
|
|
|
|
static void
|
|
restore_current_thread (ptid_t ptid)
|
|
{
|
|
if (!ptid_equal (ptid, inferior_ptid))
|
|
{
|
|
switch_to_thread (ptid);
|
|
}
|
|
}
|
|
|
|
static void
|
|
restore_selected_frame (struct frame_id a_frame_id)
|
|
{
|
|
struct frame_info *selected_frame_info = NULL;
|
|
|
|
if (frame_id_eq (a_frame_id, null_frame_id))
|
|
return;
|
|
|
|
if ((selected_frame_info = frame_find_by_id (a_frame_id)) != NULL)
|
|
{
|
|
select_frame (selected_frame_info);
|
|
}
|
|
}
|
|
|
|
struct current_thread_cleanup
|
|
{
|
|
ptid_t inferior_ptid;
|
|
struct frame_id selected_frame_id;
|
|
};
|
|
|
|
static void
|
|
do_restore_current_thread_cleanup (void *arg)
|
|
{
|
|
struct current_thread_cleanup *old = arg;
|
|
restore_current_thread (old->inferior_ptid);
|
|
|
|
/* A command like 'thread apply all $exec_command&' may change the
|
|
running state of the originally selected thread, so we have to
|
|
recheck it here. */
|
|
if (!is_running (old->inferior_ptid))
|
|
restore_selected_frame (old->selected_frame_id);
|
|
xfree (old);
|
|
}
|
|
|
|
struct cleanup *
|
|
make_cleanup_restore_current_thread (ptid_t inferior_ptid,
|
|
struct frame_id a_frame_id)
|
|
{
|
|
struct current_thread_cleanup *old
|
|
= xmalloc (sizeof (struct current_thread_cleanup));
|
|
old->inferior_ptid = inferior_ptid;
|
|
old->selected_frame_id = a_frame_id;
|
|
return make_cleanup (do_restore_current_thread_cleanup, old);
|
|
}
|
|
|
|
/* Apply a GDB command to a list of threads. List syntax is a whitespace
|
|
seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
|
|
of two numbers seperated by a hyphen. Examples:
|
|
|
|
thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
|
|
thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
|
|
thread apply all p x/i $pc Apply x/i $pc cmd to all threads
|
|
*/
|
|
|
|
static void
|
|
thread_apply_all_command (char *cmd, int from_tty)
|
|
{
|
|
struct thread_info *tp;
|
|
struct cleanup *old_chain = make_cleanup (null_cleanup, 0);
|
|
char *saved_cmd;
|
|
struct frame_id saved_frame_id;
|
|
ptid_t current_ptid;
|
|
int thread_has_changed = 0;
|
|
|
|
if (cmd == NULL || *cmd == '\000')
|
|
error (_("Please specify a command following the thread ID list"));
|
|
|
|
current_ptid = inferior_ptid;
|
|
|
|
if (!is_running (inferior_ptid))
|
|
saved_frame_id = get_frame_id (get_selected_frame (NULL));
|
|
else
|
|
saved_frame_id = null_frame_id;
|
|
make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id);
|
|
|
|
/* It is safe to update the thread list now, before
|
|
traversing it for "thread apply all". MVS */
|
|
target_find_new_threads ();
|
|
|
|
/* Save a copy of the command in case it is clobbered by
|
|
execute_command */
|
|
saved_cmd = xstrdup (cmd);
|
|
make_cleanup (xfree, saved_cmd);
|
|
for (tp = thread_list; tp; tp = tp->next)
|
|
if (thread_alive (tp))
|
|
{
|
|
if (non_stop)
|
|
context_switch_to (tp->ptid);
|
|
else
|
|
switch_to_thread (tp->ptid);
|
|
|
|
printf_filtered (_("\nThread %d (%s):\n"),
|
|
tp->num, target_tid_to_str (inferior_ptid));
|
|
execute_command (cmd, from_tty);
|
|
strcpy (cmd, saved_cmd); /* Restore exact command used previously */
|
|
}
|
|
|
|
if (!ptid_equal (current_ptid, inferior_ptid))
|
|
thread_has_changed = 1;
|
|
|
|
do_cleanups (old_chain);
|
|
/* Print stack frame only if we changed thread. */
|
|
if (thread_has_changed && !is_running (inferior_ptid))
|
|
print_stack_frame (get_current_frame (), 1, SRC_LINE);
|
|
}
|
|
|
|
static void
|
|
thread_apply_command (char *tidlist, int from_tty)
|
|
{
|
|
char *cmd;
|
|
char *p;
|
|
struct cleanup *old_chain;
|
|
struct cleanup *saved_cmd_cleanup_chain;
|
|
char *saved_cmd;
|
|
struct frame_id saved_frame_id;
|
|
ptid_t current_ptid;
|
|
int thread_has_changed = 0;
|
|
|
|
if (tidlist == NULL || *tidlist == '\000')
|
|
error (_("Please specify a thread ID list"));
|
|
|
|
for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++);
|
|
|
|
if (*cmd == '\000')
|
|
error (_("Please specify a command following the thread ID list"));
|
|
|
|
current_ptid = inferior_ptid;
|
|
|
|
if (!is_running (inferior_ptid))
|
|
saved_frame_id = get_frame_id (get_selected_frame (NULL));
|
|
else
|
|
saved_frame_id = null_frame_id;
|
|
old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id);
|
|
|
|
/* Save a copy of the command in case it is clobbered by
|
|
execute_command */
|
|
saved_cmd = xstrdup (cmd);
|
|
saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd);
|
|
while (tidlist < cmd)
|
|
{
|
|
struct thread_info *tp;
|
|
int start, end;
|
|
|
|
start = strtol (tidlist, &p, 10);
|
|
if (p == tidlist)
|
|
error (_("Error parsing %s"), tidlist);
|
|
tidlist = p;
|
|
|
|
while (*tidlist == ' ' || *tidlist == '\t')
|
|
tidlist++;
|
|
|
|
if (*tidlist == '-') /* Got a range of IDs? */
|
|
{
|
|
tidlist++; /* Skip the - */
|
|
end = strtol (tidlist, &p, 10);
|
|
if (p == tidlist)
|
|
error (_("Error parsing %s"), tidlist);
|
|
tidlist = p;
|
|
|
|
while (*tidlist == ' ' || *tidlist == '\t')
|
|
tidlist++;
|
|
}
|
|
else
|
|
end = start;
|
|
|
|
for (; start <= end; start++)
|
|
{
|
|
tp = find_thread_id (start);
|
|
|
|
if (!tp)
|
|
warning (_("Unknown thread %d."), start);
|
|
else if (!thread_alive (tp))
|
|
warning (_("Thread %d has terminated."), start);
|
|
else
|
|
{
|
|
if (non_stop)
|
|
context_switch_to (tp->ptid);
|
|
else
|
|
switch_to_thread (tp->ptid);
|
|
printf_filtered (_("\nThread %d (%s):\n"), tp->num,
|
|
target_tid_to_str (inferior_ptid));
|
|
execute_command (cmd, from_tty);
|
|
strcpy (cmd, saved_cmd); /* Restore exact command used previously */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!ptid_equal (current_ptid, inferior_ptid))
|
|
thread_has_changed = 1;
|
|
|
|
do_cleanups (saved_cmd_cleanup_chain);
|
|
do_cleanups (old_chain);
|
|
/* Print stack frame only if we changed thread. */
|
|
if (thread_has_changed)
|
|
print_stack_frame (get_current_frame (), 1, SRC_LINE);
|
|
}
|
|
|
|
/* Switch to the specified thread. Will dispatch off to thread_apply_command
|
|
if prefix of arg is `apply'. */
|
|
|
|
static void
|
|
thread_command (char *tidstr, int from_tty)
|
|
{
|
|
if (!tidstr)
|
|
{
|
|
/* Don't generate an error, just say which thread is current. */
|
|
if (target_has_stack)
|
|
printf_filtered (_("[Current thread is %d (%s)]\n"),
|
|
pid_to_thread_id (inferior_ptid),
|
|
target_tid_to_str (inferior_ptid));
|
|
else
|
|
error (_("No stack."));
|
|
return;
|
|
}
|
|
|
|
annotate_thread_changed ();
|
|
gdb_thread_select (uiout, tidstr, NULL);
|
|
}
|
|
|
|
/* Print notices when new threads are attached and detached. */
|
|
int print_thread_events = 1;
|
|
static void
|
|
show_print_thread_events (struct ui_file *file, int from_tty,
|
|
struct cmd_list_element *c, const char *value)
|
|
{
|
|
fprintf_filtered (file, _("\
|
|
Printing of thread events is %s.\n"),
|
|
value);
|
|
}
|
|
|
|
static int
|
|
do_captured_thread_select (struct ui_out *uiout, void *tidstr)
|
|
{
|
|
int num;
|
|
struct thread_info *tp;
|
|
|
|
num = value_as_long (parse_and_eval (tidstr));
|
|
|
|
tp = find_thread_id (num);
|
|
|
|
if (!tp)
|
|
error (_("Thread ID %d not known."), num);
|
|
|
|
if (!thread_alive (tp))
|
|
error (_("Thread ID %d has terminated."), num);
|
|
|
|
if (non_stop)
|
|
context_switch_to (tp->ptid);
|
|
else
|
|
switch_to_thread (tp->ptid);
|
|
|
|
ui_out_text (uiout, "[Switching to thread ");
|
|
ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid));
|
|
ui_out_text (uiout, " (");
|
|
ui_out_text (uiout, target_tid_to_str (inferior_ptid));
|
|
ui_out_text (uiout, ")]");
|
|
|
|
if (!tp->running_)
|
|
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
|
|
else
|
|
ui_out_text (uiout, "(running)\n");
|
|
|
|
return GDB_RC_OK;
|
|
}
|
|
|
|
enum gdb_rc
|
|
gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message)
|
|
{
|
|
if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr,
|
|
error_message, RETURN_MASK_ALL) < 0)
|
|
return GDB_RC_FAIL;
|
|
return GDB_RC_OK;
|
|
}
|
|
|
|
/* Commands with a prefix of `thread'. */
|
|
struct cmd_list_element *thread_cmd_list = NULL;
|
|
|
|
void
|
|
_initialize_thread (void)
|
|
{
|
|
static struct cmd_list_element *thread_apply_list = NULL;
|
|
struct cmd_list_element *c;
|
|
|
|
c = add_info ("threads", info_threads_command,
|
|
_("IDs of currently known threads."));
|
|
set_cmd_async_ok (c);
|
|
|
|
c = add_prefix_cmd ("thread", class_run, thread_command, _("\
|
|
Use this command to switch between threads.\n\
|
|
The new thread ID must be currently known."),
|
|
&thread_cmd_list, "thread ", 1, &cmdlist);
|
|
set_cmd_async_ok (c);
|
|
|
|
add_prefix_cmd ("apply", class_run, thread_apply_command,
|
|
_("Apply a command to a list of threads."),
|
|
&thread_apply_list, "thread apply ", 1, &thread_cmd_list);
|
|
|
|
add_cmd ("all", class_run, thread_apply_all_command,
|
|
_("Apply a command to all threads."), &thread_apply_list);
|
|
|
|
if (!xdb_commands)
|
|
add_com_alias ("t", "thread", class_run, 1);
|
|
|
|
add_setshow_boolean_cmd ("thread-events", no_class,
|
|
&print_thread_events, _("\
|
|
Set printing of thread events (such as thread start and exit)."), _("\
|
|
Show printing of thread events (such as thread start and exit)."), NULL,
|
|
NULL,
|
|
show_print_thread_events,
|
|
&setprintlist, &showprintlist);
|
|
}
|