mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 05:13:35 +08:00
f53fc42716
Unlike the previous patch, I don't propose that we take this patch into gdb-10-branch. This patch adds two asserts, prompted by investigating and fixing the bug fixed by the previous patch. The assert in find_thread_ptid would have caught the original issue before the segfault (I think it's slightly more use friendly). The assert in add_thread_silent would have made it clear that the solution proposed in [1] isn't the right one. The solution ended up passing nullptr as a target to add_thread. We don't want that, because add_thread_silent uses it to look up the inferior to which to add the thread. If the target is nullptr, we could find an inferior with the same pid, but belonging to an unrelated target. So we always want a non-nullptr target in add_thread_silent. gdb/ChangeLog: * thread.c (add_thread_silent): Add assert. (find_thread_ptid): Add assert. [1] https://sourceware.org/pipermail/gdb-patches/2021-February/176202.html Change-Id: Ie593ee45c5eb02235e8e9fbcda612d48ce883852
2220 lines
56 KiB
C
2220 lines
56 KiB
C
/* Multi-process/thread control for GDB, the GNU debugger.
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Copyright (C) 1986-2021 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 "gdbsupport/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 "command.h"
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#include "gdbcmd.h"
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#include "regcache.h"
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#include "btrace.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 "observable.h"
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#include "annotate.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-option.h"
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#include "gdb_regex.h"
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#include "cli/cli-utils.h"
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#include "thread-fsm.h"
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#include "tid-parse.h"
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#include <algorithm>
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#include "gdbsupport/gdb_optional.h"
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#include "inline-frame.h"
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#include "stack.h"
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/* Definition of struct thread_info exported to gdbthread.h. */
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/* Prototypes for local functions. */
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static int highest_thread_num;
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/* The current/selected thread. */
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static thread_info *current_thread_;
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/* Returns true if THR is the current thread. */
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static bool
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is_current_thread (const thread_info *thr)
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{
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return thr == current_thread_;
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}
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struct thread_info*
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inferior_thread (void)
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{
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gdb_assert (current_thread_ != nullptr);
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return current_thread_;
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}
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/* Delete the breakpoint pointed at by BP_P, if there's one. */
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static void
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delete_thread_breakpoint (struct breakpoint **bp_p)
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{
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if (*bp_p != NULL)
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{
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delete_breakpoint (*bp_p);
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*bp_p = NULL;
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}
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}
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void
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delete_step_resume_breakpoint (struct thread_info *tp)
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{
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if (tp != NULL)
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delete_thread_breakpoint (&tp->control.step_resume_breakpoint);
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}
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void
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delete_exception_resume_breakpoint (struct thread_info *tp)
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{
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if (tp != NULL)
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delete_thread_breakpoint (&tp->control.exception_resume_breakpoint);
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}
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/* See gdbthread.h. */
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void
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delete_single_step_breakpoints (struct thread_info *tp)
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{
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if (tp != NULL)
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delete_thread_breakpoint (&tp->control.single_step_breakpoints);
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}
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/* Delete the breakpoint pointed at by BP_P at the next stop, if
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there's one. */
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static void
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delete_at_next_stop (struct breakpoint **bp)
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{
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if (*bp != NULL)
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{
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(*bp)->disposition = disp_del_at_next_stop;
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*bp = NULL;
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}
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}
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/* See gdbthread.h. */
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int
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thread_has_single_step_breakpoints_set (struct thread_info *tp)
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{
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return tp->control.single_step_breakpoints != NULL;
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}
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/* See gdbthread.h. */
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int
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thread_has_single_step_breakpoint_here (struct thread_info *tp,
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const address_space *aspace,
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CORE_ADDR addr)
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{
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struct breakpoint *ss_bps = tp->control.single_step_breakpoints;
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return (ss_bps != NULL
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&& breakpoint_has_location_inserted_here (ss_bps, aspace, addr));
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}
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/* See gdbthread.h. */
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void
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thread_cancel_execution_command (struct thread_info *thr)
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{
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if (thr->thread_fsm != NULL)
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{
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thr->thread_fsm->clean_up (thr);
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delete thr->thread_fsm;
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thr->thread_fsm = NULL;
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}
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}
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static void
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clear_thread_inferior_resources (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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delete_at_next_stop (&tp->control.step_resume_breakpoint);
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delete_at_next_stop (&tp->control.exception_resume_breakpoint);
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delete_at_next_stop (&tp->control.single_step_breakpoints);
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delete_longjmp_breakpoint_at_next_stop (tp->global_num);
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bpstat_clear (&tp->control.stop_bpstat);
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btrace_teardown (tp);
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thread_cancel_execution_command (tp);
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clear_inline_frame_state (tp);
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}
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/* Set the TP's state as exited. */
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static void
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set_thread_exited (thread_info *tp, bool silent)
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{
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/* Dead threads don't need to step-over. Remove from chain. */
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if (tp->step_over_next != NULL)
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global_thread_step_over_chain_remove (tp);
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if (tp->state != THREAD_EXITED)
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{
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gdb::observers::thread_exit.notify (tp, silent);
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/* Tag it as exited. */
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tp->state = THREAD_EXITED;
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/* Clear breakpoints, etc. associated with this thread. */
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clear_thread_inferior_resources (tp);
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}
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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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highest_thread_num = 0;
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for (thread_info *tp : all_threads_safe ())
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{
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inferior *inf = tp->inf;
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if (tp->deletable ())
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delete tp;
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else
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set_thread_exited (tp, 1);
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inf->thread_list = NULL;
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}
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}
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/* Allocate a new thread of inferior INF with target id PTID and add
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it to the thread list. */
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static struct thread_info *
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new_thread (struct inferior *inf, ptid_t ptid)
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{
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thread_info *tp = new thread_info (inf, ptid);
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if (inf->thread_list == NULL)
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inf->thread_list = tp;
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else
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{
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struct thread_info *last;
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for (last = inf->thread_list; last->next != NULL; last = last->next)
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gdb_assert (ptid != last->ptid
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|| last->state == THREAD_EXITED);
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gdb_assert (ptid != last->ptid
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|| last->state == THREAD_EXITED);
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last->next = tp;
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}
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return tp;
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}
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struct thread_info *
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add_thread_silent (process_stratum_target *targ, ptid_t ptid)
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{
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gdb_assert (targ != nullptr);
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inferior *inf = find_inferior_ptid (targ, ptid);
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/* We may have an old thread with the same id in the thread list.
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If we do, it must be dead, otherwise we wouldn't be adding a new
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thread with the same id. The OS is reusing this id --- delete
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the old thread, and create a new one. */
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thread_info *tp = find_thread_ptid (inf, ptid);
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if (tp != nullptr)
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delete_thread (tp);
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tp = new_thread (inf, ptid);
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gdb::observers::new_thread.notify (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 (process_stratum_target *targ, ptid_t ptid,
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private_thread_info *priv)
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{
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thread_info *result = add_thread_silent (targ, ptid);
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result->priv.reset (priv);
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if (print_thread_events)
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printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid).c_str ());
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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 (process_stratum_target *targ, ptid_t ptid)
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{
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return add_thread_with_info (targ, ptid, NULL);
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}
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private_thread_info::~private_thread_info () = default;
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thread_info::thread_info (struct inferior *inf_, ptid_t ptid_)
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: ptid (ptid_), inf (inf_)
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{
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gdb_assert (inf_ != NULL);
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this->global_num = ++highest_thread_num;
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this->per_inf_num = ++inf_->highest_thread_num;
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/* Nothing to follow yet. */
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memset (&this->pending_follow, 0, sizeof (this->pending_follow));
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this->pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
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this->suspend.waitstatus.kind = TARGET_WAITKIND_IGNORE;
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}
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thread_info::~thread_info ()
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{
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xfree (this->name);
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}
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/* See gdbthread.h. */
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bool
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thread_info::deletable () const
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{
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/* If this is the current thread, or there's code out there that
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relies on it existing (refcount > 0) we can't delete yet. */
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return refcount () == 0 && !is_current_thread (this);
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}
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/* Add TP to the end of the step-over chain LIST_P. */
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static void
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step_over_chain_enqueue (struct thread_info **list_p, struct thread_info *tp)
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{
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gdb_assert (tp->step_over_next == NULL);
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gdb_assert (tp->step_over_prev == NULL);
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if (*list_p == NULL)
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{
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*list_p = tp;
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tp->step_over_prev = tp->step_over_next = tp;
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}
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else
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{
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struct thread_info *head = *list_p;
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struct thread_info *tail = head->step_over_prev;
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tp->step_over_prev = tail;
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tp->step_over_next = head;
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head->step_over_prev = tp;
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tail->step_over_next = tp;
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}
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}
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/* See gdbthread.h. */
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void
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thread_step_over_chain_remove (thread_info **list_p, thread_info *tp)
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{
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gdb_assert (tp->step_over_next != NULL);
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gdb_assert (tp->step_over_prev != NULL);
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if (*list_p == tp)
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{
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if (tp == tp->step_over_next)
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*list_p = NULL;
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else
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*list_p = tp->step_over_next;
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}
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tp->step_over_prev->step_over_next = tp->step_over_next;
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tp->step_over_next->step_over_prev = tp->step_over_prev;
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tp->step_over_prev = tp->step_over_next = NULL;
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}
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/* See gdbthread.h. */
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thread_info *
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thread_step_over_chain_next (thread_info *chain_head, thread_info *tp)
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{
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thread_info *next = tp->step_over_next;
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return next == chain_head ? NULL : next;
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}
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/* See gdbthread.h. */
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struct thread_info *
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global_thread_step_over_chain_next (struct thread_info *tp)
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{
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return thread_step_over_chain_next (global_thread_step_over_chain_head, tp);
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}
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/* See gdbthread.h. */
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int
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thread_is_in_step_over_chain (struct thread_info *tp)
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{
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return (tp->step_over_next != NULL);
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}
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/* See gdbthread.h. */
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int
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thread_step_over_chain_length (thread_info *tp)
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{
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if (tp == nullptr)
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return 0;
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gdb_assert (thread_is_in_step_over_chain (tp));
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int num = 1;
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for (thread_info *iter = tp->step_over_next;
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iter != tp;
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iter = iter->step_over_next)
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++num;
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return num;
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}
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/* See gdbthread.h. */
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void
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global_thread_step_over_chain_enqueue (struct thread_info *tp)
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{
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infrun_debug_printf ("enqueueing thread %s in global step over chain",
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target_pid_to_str (tp->ptid).c_str ());
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step_over_chain_enqueue (&global_thread_step_over_chain_head, tp);
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}
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/* See gdbthread.h. */
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void
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global_thread_step_over_chain_enqueue_chain (thread_info *chain_head)
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{
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gdb_assert (chain_head->step_over_next != nullptr);
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gdb_assert (chain_head->step_over_prev != nullptr);
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if (global_thread_step_over_chain_head == nullptr)
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global_thread_step_over_chain_head = chain_head;
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else
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{
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thread_info *global_last = global_thread_step_over_chain_head->step_over_prev;
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thread_info *chain_last = chain_head->step_over_prev;
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chain_last->step_over_next = global_thread_step_over_chain_head;
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global_last->step_over_next = chain_head;
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global_thread_step_over_chain_head->step_over_prev = chain_last;
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chain_head->step_over_prev = global_last;
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}
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}
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/* See gdbthread.h. */
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void
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global_thread_step_over_chain_remove (struct thread_info *tp)
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{
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infrun_debug_printf ("removing thread %s from global step over chain",
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target_pid_to_str (tp->ptid).c_str ());
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thread_step_over_chain_remove (&global_thread_step_over_chain_head, tp);
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}
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/* Delete the thread referenced by THR. If SILENT, don't notify
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the observer of this exit.
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THR must not be NULL or a failed assertion will be raised. */
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static void
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delete_thread_1 (thread_info *thr, bool silent)
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{
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gdb_assert (thr != nullptr);
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struct thread_info *tp, *tpprev = NULL;
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for (tp = thr->inf->thread_list; tp; tpprev = tp, tp = tp->next)
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if (tp == thr)
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break;
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if (!tp)
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return;
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set_thread_exited (tp, silent);
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if (!tp->deletable ())
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{
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/* Will be really deleted some other time. */
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return;
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}
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if (tpprev)
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tpprev->next = tp->next;
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else
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tp->inf->thread_list = tp->next;
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delete tp;
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}
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/* See gdbthread.h. */
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void
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delete_thread (thread_info *thread)
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{
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delete_thread_1 (thread, false /* not silent */);
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}
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void
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delete_thread_silent (thread_info *thread)
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{
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delete_thread_1 (thread, true /* silent */);
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}
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struct thread_info *
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find_thread_global_id (int global_id)
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{
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for (thread_info *tp : all_threads ())
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if (tp->global_num == global_id)
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return tp;
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return NULL;
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}
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static struct thread_info *
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find_thread_id (struct inferior *inf, int thr_num)
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{
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for (thread_info *tp : inf->threads ())
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if (tp->per_inf_num == thr_num)
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return tp;
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return NULL;
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}
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/* See gdbthread.h. */
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struct thread_info *
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find_thread_ptid (process_stratum_target *targ, ptid_t ptid)
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{
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inferior *inf = find_inferior_ptid (targ, ptid);
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if (inf == NULL)
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return NULL;
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return find_thread_ptid (inf, ptid);
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}
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/* See gdbthread.h. */
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struct thread_info *
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find_thread_ptid (inferior *inf, ptid_t ptid)
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{
|
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gdb_assert (inf != nullptr);
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|
|
for (thread_info *tp : inf->non_exited_threads ())
|
|
if (tp->ptid == ptid)
|
|
return tp;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
struct thread_info *
|
|
find_thread_by_handle (gdb::array_view<const gdb_byte> handle,
|
|
struct inferior *inf)
|
|
{
|
|
return target_thread_handle_to_thread_info (handle.data (),
|
|
handle.size (),
|
|
inf);
|
|
}
|
|
|
|
/*
|
|
* Thread iterator function.
|
|
*
|
|
* Calls a callback function once for each thread, so long as
|
|
* the callback function returns false. If the callback function
|
|
* returns true, the iteration will end and the current thread
|
|
* will be returned. This can be useful for implementing a
|
|
* search for a thread with arbitrary attributes, or for applying
|
|
* some operation to every thread.
|
|
*
|
|
* FIXME: some of the existing functionality, such as
|
|
* "Thread apply all", might be rewritten using this functionality.
|
|
*/
|
|
|
|
struct thread_info *
|
|
iterate_over_threads (int (*callback) (struct thread_info *, void *),
|
|
void *data)
|
|
{
|
|
for (thread_info *tp : all_threads_safe ())
|
|
if ((*callback) (tp, data))
|
|
return tp;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
bool
|
|
any_thread_p ()
|
|
{
|
|
for (thread_info *tp ATTRIBUTE_UNUSED : all_threads ())
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
int
|
|
thread_count (process_stratum_target *proc_target)
|
|
{
|
|
auto rng = all_threads (proc_target);
|
|
return std::distance (rng.begin (), rng.end ());
|
|
}
|
|
|
|
/* Return the number of non-exited threads in the thread list. */
|
|
|
|
static int
|
|
live_threads_count (void)
|
|
{
|
|
auto rng = all_non_exited_threads ();
|
|
return std::distance (rng.begin (), rng.end ());
|
|
}
|
|
|
|
int
|
|
valid_global_thread_id (int global_id)
|
|
{
|
|
for (thread_info *tp : all_threads ())
|
|
if (tp->global_num == global_id)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool
|
|
in_thread_list (process_stratum_target *targ, ptid_t ptid)
|
|
{
|
|
return find_thread_ptid (targ, ptid) != nullptr;
|
|
}
|
|
|
|
/* Finds the first thread of the inferior. */
|
|
|
|
thread_info *
|
|
first_thread_of_inferior (inferior *inf)
|
|
{
|
|
return inf->thread_list;
|
|
}
|
|
|
|
thread_info *
|
|
any_thread_of_inferior (inferior *inf)
|
|
{
|
|
gdb_assert (inf->pid != 0);
|
|
|
|
/* Prefer the current thread. */
|
|
if (inf == current_inferior ())
|
|
return inferior_thread ();
|
|
|
|
for (thread_info *tp : inf->non_exited_threads ())
|
|
return tp;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
thread_info *
|
|
any_live_thread_of_inferior (inferior *inf)
|
|
{
|
|
struct thread_info *curr_tp = NULL;
|
|
struct thread_info *tp_executing = NULL;
|
|
|
|
gdb_assert (inf != NULL && inf->pid != 0);
|
|
|
|
/* Prefer the current thread if it's not executing. */
|
|
if (inferior_ptid != null_ptid && current_inferior () == inf)
|
|
{
|
|
/* If the current thread is dead, forget it. If it's not
|
|
executing, use it. Otherwise, still choose it (below), but
|
|
only if no other non-executing thread is found. */
|
|
curr_tp = inferior_thread ();
|
|
if (curr_tp->state == THREAD_EXITED)
|
|
curr_tp = NULL;
|
|
else if (!curr_tp->executing)
|
|
return curr_tp;
|
|
}
|
|
|
|
for (thread_info *tp : inf->non_exited_threads ())
|
|
{
|
|
if (!tp->executing)
|
|
return tp;
|
|
|
|
tp_executing = tp;
|
|
}
|
|
|
|
/* If both the current thread and all live threads are executing,
|
|
prefer the current thread. */
|
|
if (curr_tp != NULL)
|
|
return curr_tp;
|
|
|
|
/* Otherwise, just return an executing thread, if any. */
|
|
return tp_executing;
|
|
}
|
|
|
|
/* Return true if TP is an active thread. */
|
|
static bool
|
|
thread_alive (thread_info *tp)
|
|
{
|
|
if (tp->state == THREAD_EXITED)
|
|
return false;
|
|
|
|
/* Ensure we're looking at the right target stack. */
|
|
gdb_assert (tp->inf == current_inferior ());
|
|
|
|
return target_thread_alive (tp->ptid);
|
|
}
|
|
|
|
/* Switch to thread TP if it is alive. Returns true if successfully
|
|
switched, false otherwise. */
|
|
|
|
static bool
|
|
switch_to_thread_if_alive (thread_info *thr)
|
|
{
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
/* Switch inferior first, so that we're looking at the right target
|
|
stack. */
|
|
switch_to_inferior_no_thread (thr->inf);
|
|
|
|
if (thread_alive (thr))
|
|
{
|
|
switch_to_thread (thr);
|
|
restore_thread.dont_restore ();
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* See gdbthreads.h. */
|
|
|
|
void
|
|
prune_threads (void)
|
|
{
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
for (thread_info *tp : all_threads_safe ())
|
|
{
|
|
switch_to_inferior_no_thread (tp->inf);
|
|
|
|
if (!thread_alive (tp))
|
|
delete_thread (tp);
|
|
}
|
|
}
|
|
|
|
/* See gdbthreads.h. */
|
|
|
|
void
|
|
delete_exited_threads (void)
|
|
{
|
|
for (thread_info *tp : all_threads_safe ())
|
|
if (tp->state == THREAD_EXITED)
|
|
delete_thread (tp);
|
|
}
|
|
|
|
/* Return true value if stack temporaries are enabled for the thread
|
|
TP. */
|
|
|
|
bool
|
|
thread_stack_temporaries_enabled_p (thread_info *tp)
|
|
{
|
|
if (tp == NULL)
|
|
return false;
|
|
else
|
|
return tp->stack_temporaries_enabled;
|
|
}
|
|
|
|
/* Push V on to the stack temporaries of the thread with id PTID. */
|
|
|
|
void
|
|
push_thread_stack_temporary (thread_info *tp, struct value *v)
|
|
{
|
|
gdb_assert (tp != NULL && tp->stack_temporaries_enabled);
|
|
tp->stack_temporaries.push_back (v);
|
|
}
|
|
|
|
/* Return true if VAL is among the stack temporaries of the thread
|
|
TP. Return false otherwise. */
|
|
|
|
bool
|
|
value_in_thread_stack_temporaries (struct value *val, thread_info *tp)
|
|
{
|
|
gdb_assert (tp != NULL && tp->stack_temporaries_enabled);
|
|
for (value *v : tp->stack_temporaries)
|
|
if (v == val)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Return the last of the stack temporaries for thread with id PTID.
|
|
Return NULL if there are no stack temporaries for the thread. */
|
|
|
|
value *
|
|
get_last_thread_stack_temporary (thread_info *tp)
|
|
{
|
|
struct value *lastval = NULL;
|
|
|
|
gdb_assert (tp != NULL);
|
|
if (!tp->stack_temporaries.empty ())
|
|
lastval = tp->stack_temporaries.back ();
|
|
|
|
return lastval;
|
|
}
|
|
|
|
void
|
|
thread_change_ptid (process_stratum_target *targ,
|
|
ptid_t old_ptid, ptid_t new_ptid)
|
|
{
|
|
struct inferior *inf;
|
|
struct thread_info *tp;
|
|
|
|
/* It can happen that what we knew as the target inferior id
|
|
changes. E.g, target remote may only discover the remote process
|
|
pid after adding the inferior to GDB's list. */
|
|
inf = find_inferior_ptid (targ, old_ptid);
|
|
inf->pid = new_ptid.pid ();
|
|
|
|
tp = find_thread_ptid (inf, old_ptid);
|
|
tp->ptid = new_ptid;
|
|
|
|
gdb::observers::thread_ptid_changed.notify (targ, old_ptid, new_ptid);
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
set_resumed (process_stratum_target *targ, ptid_t ptid, bool resumed)
|
|
{
|
|
for (thread_info *tp : all_non_exited_threads (targ, ptid))
|
|
tp->resumed = resumed;
|
|
}
|
|
|
|
/* Helper for set_running, that marks one thread either running or
|
|
stopped. */
|
|
|
|
static bool
|
|
set_running_thread (struct thread_info *tp, bool running)
|
|
{
|
|
bool started = false;
|
|
|
|
if (running && tp->state == THREAD_STOPPED)
|
|
started = true;
|
|
tp->state = running ? THREAD_RUNNING : THREAD_STOPPED;
|
|
|
|
if (!running)
|
|
{
|
|
/* If the thread is now marked stopped, remove it from
|
|
the step-over queue, so that we don't try to resume
|
|
it until the user wants it to. */
|
|
if (tp->step_over_next != NULL)
|
|
global_thread_step_over_chain_remove (tp);
|
|
}
|
|
|
|
return started;
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
thread_info::set_running (bool running)
|
|
{
|
|
if (set_running_thread (this, running))
|
|
gdb::observers::target_resumed.notify (this->ptid);
|
|
}
|
|
|
|
void
|
|
set_running (process_stratum_target *targ, ptid_t ptid, bool running)
|
|
{
|
|
/* We try not to notify the observer if no thread has actually
|
|
changed the running state -- merely to reduce the number of
|
|
messages to the MI frontend. A frontend is supposed to handle
|
|
multiple *running notifications just fine. */
|
|
bool any_started = false;
|
|
|
|
for (thread_info *tp : all_non_exited_threads (targ, ptid))
|
|
if (set_running_thread (tp, running))
|
|
any_started = true;
|
|
|
|
if (any_started)
|
|
gdb::observers::target_resumed.notify (ptid);
|
|
}
|
|
|
|
|
|
/* Helper for set_executing. Set's the thread's 'executing' field
|
|
from EXECUTING, and if EXECUTING is true also clears the thread's
|
|
stop_pc. */
|
|
|
|
static void
|
|
set_executing_thread (thread_info *thr, bool executing)
|
|
{
|
|
thr->executing = executing;
|
|
if (executing)
|
|
thr->suspend.stop_pc = ~(CORE_ADDR) 0;
|
|
}
|
|
|
|
void
|
|
set_executing (process_stratum_target *targ, ptid_t ptid, bool executing)
|
|
{
|
|
for (thread_info *tp : all_non_exited_threads (targ, ptid))
|
|
set_executing_thread (tp, executing);
|
|
|
|
/* It only takes one running thread to spawn more threads. */
|
|
if (executing)
|
|
targ->threads_executing = true;
|
|
/* Only clear the flag if the caller is telling us everything is
|
|
stopped. */
|
|
else if (minus_one_ptid == ptid)
|
|
targ->threads_executing = false;
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
bool
|
|
threads_are_executing (process_stratum_target *target)
|
|
{
|
|
return target->threads_executing;
|
|
}
|
|
|
|
void
|
|
set_stop_requested (process_stratum_target *targ, ptid_t ptid, bool stop)
|
|
{
|
|
for (thread_info *tp : all_non_exited_threads (targ, ptid))
|
|
tp->stop_requested = stop;
|
|
|
|
/* Call the stop requested observer so other components of GDB can
|
|
react to this request. */
|
|
if (stop)
|
|
gdb::observers::thread_stop_requested.notify (ptid);
|
|
}
|
|
|
|
void
|
|
finish_thread_state (process_stratum_target *targ, ptid_t ptid)
|
|
{
|
|
bool any_started = false;
|
|
|
|
for (thread_info *tp : all_non_exited_threads (targ, ptid))
|
|
if (set_running_thread (tp, tp->executing))
|
|
any_started = true;
|
|
|
|
if (any_started)
|
|
gdb::observers::target_resumed.notify (ptid);
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
validate_registers_access (void)
|
|
{
|
|
/* No selected thread, no registers. */
|
|
if (inferior_ptid == null_ptid)
|
|
error (_("No thread selected."));
|
|
|
|
thread_info *tp = inferior_thread ();
|
|
|
|
/* Don't try to read from a dead thread. */
|
|
if (tp->state == THREAD_EXITED)
|
|
error (_("The current thread has terminated"));
|
|
|
|
/* ... or from a spinning thread. FIXME: This isn't actually fully
|
|
correct. It'll allow an user-requested access (e.g., "print $pc"
|
|
at the prompt) when a thread is not executing for some internal
|
|
reason, but is marked running from the user's perspective. E.g.,
|
|
the thread is waiting for its turn in the step-over queue. */
|
|
if (tp->executing)
|
|
error (_("Selected thread is running."));
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
bool
|
|
can_access_registers_thread (thread_info *thread)
|
|
{
|
|
/* No thread, no registers. */
|
|
if (thread == NULL)
|
|
return false;
|
|
|
|
/* Don't try to read from a dead thread. */
|
|
if (thread->state == THREAD_EXITED)
|
|
return false;
|
|
|
|
/* ... or from a spinning thread. FIXME: see validate_registers_access. */
|
|
if (thread->executing)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int
|
|
pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread)
|
|
{
|
|
return (pc >= thread->control.step_range_start
|
|
&& pc < thread->control.step_range_end);
|
|
}
|
|
|
|
/* Helper for print_thread_info. Returns true if THR should be
|
|
printed. If REQUESTED_THREADS, a list of GDB ids/ranges, is not
|
|
NULL, only print THR if its ID is included in the list. GLOBAL_IDS
|
|
is true if REQUESTED_THREADS is list of global IDs, false if a list
|
|
of per-inferior thread ids. If PID is not -1, only print THR if it
|
|
is a thread from the process PID. Otherwise, threads from all
|
|
attached PIDs are printed. If both REQUESTED_THREADS is not NULL
|
|
and PID is not -1, then the thread is printed if it belongs to the
|
|
specified process. Otherwise, an error is raised. */
|
|
|
|
static int
|
|
should_print_thread (const char *requested_threads, int default_inf_num,
|
|
int global_ids, int pid, struct thread_info *thr)
|
|
{
|
|
if (requested_threads != NULL && *requested_threads != '\0')
|
|
{
|
|
int in_list;
|
|
|
|
if (global_ids)
|
|
in_list = number_is_in_list (requested_threads, thr->global_num);
|
|
else
|
|
in_list = tid_is_in_list (requested_threads, default_inf_num,
|
|
thr->inf->num, thr->per_inf_num);
|
|
if (!in_list)
|
|
return 0;
|
|
}
|
|
|
|
if (pid != -1 && thr->ptid.pid () != pid)
|
|
{
|
|
if (requested_threads != NULL && *requested_threads != '\0')
|
|
error (_("Requested thread not found in requested process"));
|
|
return 0;
|
|
}
|
|
|
|
if (thr->state == THREAD_EXITED)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Return the string to display in "info threads"'s "Target Id"
|
|
column, for TP. */
|
|
|
|
static std::string
|
|
thread_target_id_str (thread_info *tp)
|
|
{
|
|
std::string target_id = target_pid_to_str (tp->ptid);
|
|
const char *extra_info = target_extra_thread_info (tp);
|
|
const char *name = tp->name != nullptr ? tp->name : target_thread_name (tp);
|
|
|
|
if (extra_info != nullptr && name != nullptr)
|
|
return string_printf ("%s \"%s\" (%s)", target_id.c_str (), name,
|
|
extra_info);
|
|
else if (extra_info != nullptr)
|
|
return string_printf ("%s (%s)", target_id.c_str (), extra_info);
|
|
else if (name != nullptr)
|
|
return string_printf ("%s \"%s\"", target_id.c_str (), name);
|
|
else
|
|
return target_id;
|
|
}
|
|
|
|
/* Like print_thread_info, but in addition, GLOBAL_IDS indicates
|
|
whether REQUESTED_THREADS is a list of global or per-inferior
|
|
thread ids. */
|
|
|
|
static void
|
|
print_thread_info_1 (struct ui_out *uiout, const char *requested_threads,
|
|
int global_ids, int pid,
|
|
int show_global_ids)
|
|
{
|
|
int default_inf_num = current_inferior ()->num;
|
|
|
|
update_thread_list ();
|
|
|
|
/* Whether we saw any thread. */
|
|
bool any_thread = false;
|
|
/* Whether the current thread is exited. */
|
|
bool current_exited = false;
|
|
|
|
thread_info *current_thread = (inferior_ptid != null_ptid
|
|
? inferior_thread () : NULL);
|
|
|
|
{
|
|
/* For backward compatibility, we make a list for MI. A table is
|
|
preferable for the CLI, though, because it shows table
|
|
headers. */
|
|
gdb::optional<ui_out_emit_list> list_emitter;
|
|
gdb::optional<ui_out_emit_table> table_emitter;
|
|
|
|
/* We'll be switching threads temporarily below. */
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
if (uiout->is_mi_like_p ())
|
|
list_emitter.emplace (uiout, "threads");
|
|
else
|
|
{
|
|
int n_threads = 0;
|
|
/* The width of the "Target Id" column. Grown below to
|
|
accommodate the largest entry. */
|
|
size_t target_id_col_width = 17;
|
|
|
|
for (thread_info *tp : all_threads ())
|
|
{
|
|
if (!should_print_thread (requested_threads, default_inf_num,
|
|
global_ids, pid, tp))
|
|
continue;
|
|
|
|
if (!uiout->is_mi_like_p ())
|
|
{
|
|
/* Switch inferiors so we're looking at the right
|
|
target stack. */
|
|
switch_to_inferior_no_thread (tp->inf);
|
|
|
|
target_id_col_width
|
|
= std::max (target_id_col_width,
|
|
thread_target_id_str (tp).size ());
|
|
}
|
|
|
|
++n_threads;
|
|
}
|
|
|
|
if (n_threads == 0)
|
|
{
|
|
if (requested_threads == NULL || *requested_threads == '\0')
|
|
uiout->message (_("No threads.\n"));
|
|
else
|
|
uiout->message (_("No threads match '%s'.\n"),
|
|
requested_threads);
|
|
return;
|
|
}
|
|
|
|
table_emitter.emplace (uiout, show_global_ids ? 5 : 4,
|
|
n_threads, "threads");
|
|
|
|
uiout->table_header (1, ui_left, "current", "");
|
|
uiout->table_header (4, ui_left, "id-in-tg", "Id");
|
|
if (show_global_ids)
|
|
uiout->table_header (4, ui_left, "id", "GId");
|
|
uiout->table_header (target_id_col_width, ui_left,
|
|
"target-id", "Target Id");
|
|
uiout->table_header (1, ui_left, "frame", "Frame");
|
|
uiout->table_body ();
|
|
}
|
|
|
|
for (inferior *inf : all_inferiors ())
|
|
for (thread_info *tp : inf->threads ())
|
|
{
|
|
int core;
|
|
|
|
any_thread = true;
|
|
if (tp == current_thread && tp->state == THREAD_EXITED)
|
|
current_exited = true;
|
|
|
|
if (!should_print_thread (requested_threads, default_inf_num,
|
|
global_ids, pid, tp))
|
|
continue;
|
|
|
|
ui_out_emit_tuple tuple_emitter (uiout, NULL);
|
|
|
|
if (!uiout->is_mi_like_p ())
|
|
{
|
|
if (tp == current_thread)
|
|
uiout->field_string ("current", "*");
|
|
else
|
|
uiout->field_skip ("current");
|
|
|
|
uiout->field_string ("id-in-tg", print_thread_id (tp));
|
|
}
|
|
|
|
if (show_global_ids || uiout->is_mi_like_p ())
|
|
uiout->field_signed ("id", tp->global_num);
|
|
|
|
/* Switch to the thread (and inferior / target). */
|
|
switch_to_thread (tp);
|
|
|
|
/* For the CLI, we stuff everything into the target-id field.
|
|
This is a gross hack to make the output come out looking
|
|
correct. The underlying problem here is that ui-out has no
|
|
way to specify that a field's space allocation should be
|
|
shared by several fields. For MI, we do the right thing
|
|
instead. */
|
|
|
|
if (uiout->is_mi_like_p ())
|
|
{
|
|
uiout->field_string ("target-id", target_pid_to_str (tp->ptid));
|
|
|
|
const char *extra_info = target_extra_thread_info (tp);
|
|
if (extra_info != nullptr)
|
|
uiout->field_string ("details", extra_info);
|
|
|
|
const char *name = (tp->name != nullptr
|
|
? tp->name
|
|
: target_thread_name (tp));
|
|
if (name != NULL)
|
|
uiout->field_string ("name", name);
|
|
}
|
|
else
|
|
{
|
|
uiout->field_string ("target-id",
|
|
thread_target_id_str (tp).c_str ());
|
|
}
|
|
|
|
if (tp->state == THREAD_RUNNING)
|
|
uiout->text ("(running)\n");
|
|
else
|
|
{
|
|
/* The switch above put us at the top of the stack (leaf
|
|
frame). */
|
|
print_stack_frame (get_selected_frame (NULL),
|
|
/* For MI output, print frame level. */
|
|
uiout->is_mi_like_p (),
|
|
LOCATION, 0);
|
|
}
|
|
|
|
if (uiout->is_mi_like_p ())
|
|
{
|
|
const char *state = "stopped";
|
|
|
|
if (tp->state == THREAD_RUNNING)
|
|
state = "running";
|
|
uiout->field_string ("state", state);
|
|
}
|
|
|
|
core = target_core_of_thread (tp->ptid);
|
|
if (uiout->is_mi_like_p () && core != -1)
|
|
uiout->field_signed ("core", core);
|
|
}
|
|
|
|
/* This end scope restores the current thread and the frame
|
|
selected before the "info threads" command, and it finishes the
|
|
ui-out list or table. */
|
|
}
|
|
|
|
if (pid == -1 && requested_threads == NULL)
|
|
{
|
|
if (uiout->is_mi_like_p () && inferior_ptid != null_ptid)
|
|
uiout->field_signed ("current-thread-id", current_thread->global_num);
|
|
|
|
if (inferior_ptid != null_ptid && current_exited)
|
|
uiout->message ("\n\
|
|
The current thread <Thread ID %s> has terminated. See `help thread'.\n",
|
|
print_thread_id (inferior_thread ()));
|
|
else if (any_thread && inferior_ptid == null_ptid)
|
|
uiout->message ("\n\
|
|
No selected thread. See `help thread'.\n");
|
|
}
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
print_thread_info (struct ui_out *uiout, const char *requested_threads,
|
|
int pid)
|
|
{
|
|
print_thread_info_1 (uiout, requested_threads, 1, pid, 0);
|
|
}
|
|
|
|
/* The options for the "info threads" command. */
|
|
|
|
struct info_threads_opts
|
|
{
|
|
/* For "-gid". */
|
|
bool show_global_ids = false;
|
|
};
|
|
|
|
static const gdb::option::option_def info_threads_option_defs[] = {
|
|
|
|
gdb::option::flag_option_def<info_threads_opts> {
|
|
"gid",
|
|
[] (info_threads_opts *opts) { return &opts->show_global_ids; },
|
|
N_("Show global thread IDs."),
|
|
},
|
|
|
|
};
|
|
|
|
/* Create an option_def_group for the "info threads" options, with
|
|
IT_OPTS as context. */
|
|
|
|
static inline gdb::option::option_def_group
|
|
make_info_threads_options_def_group (info_threads_opts *it_opts)
|
|
{
|
|
return {{info_threads_option_defs}, it_opts};
|
|
}
|
|
|
|
/* Implementation of the "info threads" command.
|
|
|
|
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 (const char *arg, int from_tty)
|
|
{
|
|
info_threads_opts it_opts;
|
|
|
|
auto grp = make_info_threads_options_def_group (&it_opts);
|
|
gdb::option::process_options
|
|
(&arg, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, grp);
|
|
|
|
print_thread_info_1 (current_uiout, arg, 0, -1, it_opts.show_global_ids);
|
|
}
|
|
|
|
/* Completer for the "info threads" command. */
|
|
|
|
static void
|
|
info_threads_command_completer (struct cmd_list_element *ignore,
|
|
completion_tracker &tracker,
|
|
const char *text, const char *word_ignored)
|
|
{
|
|
const auto grp = make_info_threads_options_def_group (nullptr);
|
|
|
|
if (gdb::option::complete_options
|
|
(tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, grp))
|
|
return;
|
|
|
|
/* Convenience to let the user know what the option can accept. */
|
|
if (*text == '\0')
|
|
{
|
|
gdb::option::complete_on_all_options (tracker, grp);
|
|
/* Keep this "ID" in sync with what "help info threads"
|
|
says. */
|
|
tracker.add_completion (make_unique_xstrdup ("ID"));
|
|
}
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
switch_to_thread_no_regs (struct thread_info *thread)
|
|
{
|
|
struct inferior *inf = thread->inf;
|
|
|
|
set_current_program_space (inf->pspace);
|
|
set_current_inferior (inf);
|
|
|
|
current_thread_ = thread;
|
|
inferior_ptid = current_thread_->ptid;
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
switch_to_no_thread ()
|
|
{
|
|
if (current_thread_ == nullptr)
|
|
return;
|
|
|
|
current_thread_ = nullptr;
|
|
inferior_ptid = null_ptid;
|
|
reinit_frame_cache ();
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
switch_to_thread (thread_info *thr)
|
|
{
|
|
gdb_assert (thr != NULL);
|
|
|
|
if (is_current_thread (thr))
|
|
return;
|
|
|
|
switch_to_thread_no_regs (thr);
|
|
|
|
reinit_frame_cache ();
|
|
}
|
|
|
|
/* See gdbsupport/common-gdbthread.h. */
|
|
|
|
void
|
|
switch_to_thread (process_stratum_target *proc_target, ptid_t ptid)
|
|
{
|
|
thread_info *thr = find_thread_ptid (proc_target, ptid);
|
|
switch_to_thread (thr);
|
|
}
|
|
|
|
/* See frame.h. */
|
|
|
|
void
|
|
scoped_restore_current_thread::restore ()
|
|
{
|
|
/* If an entry of thread_info was previously selected, it won't be
|
|
deleted because we've increased its refcount. The thread represented
|
|
by this thread_info entry may have already exited (due to normal exit,
|
|
detach, etc), so the thread_info.state is THREAD_EXITED. */
|
|
if (m_thread != NULL
|
|
/* If the previously selected thread belonged to a process that has
|
|
in the mean time exited (or killed, detached, etc.), then don't revert
|
|
back to it, but instead simply drop back to no thread selected. */
|
|
&& m_inf->pid != 0)
|
|
switch_to_thread (m_thread.get ());
|
|
else
|
|
switch_to_inferior_no_thread (m_inf.get ());
|
|
|
|
/* The running state of the originally selected thread may have
|
|
changed, so we have to recheck it here. */
|
|
if (inferior_ptid != null_ptid
|
|
&& m_was_stopped
|
|
&& m_thread->state == THREAD_STOPPED
|
|
&& target_has_registers ()
|
|
&& target_has_stack ()
|
|
&& target_has_memory ())
|
|
restore_selected_frame (m_selected_frame_id, m_selected_frame_level);
|
|
|
|
set_language (m_lang);
|
|
}
|
|
|
|
scoped_restore_current_thread::~scoped_restore_current_thread ()
|
|
{
|
|
if (!m_dont_restore)
|
|
restore ();
|
|
}
|
|
|
|
scoped_restore_current_thread::scoped_restore_current_thread ()
|
|
{
|
|
m_inf = inferior_ref::new_reference (current_inferior ());
|
|
|
|
m_lang = current_language->la_language;
|
|
|
|
if (inferior_ptid != null_ptid)
|
|
{
|
|
m_thread = thread_info_ref::new_reference (inferior_thread ());
|
|
|
|
m_was_stopped = m_thread->state == THREAD_STOPPED;
|
|
save_selected_frame (&m_selected_frame_id, &m_selected_frame_level);
|
|
}
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
int
|
|
show_thread_that_caused_stop (void)
|
|
{
|
|
return highest_thread_num > 1;
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
int
|
|
show_inferior_qualified_tids (void)
|
|
{
|
|
return (inferior_list->next != NULL || inferior_list->num != 1);
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
const char *
|
|
print_thread_id (struct thread_info *thr)
|
|
{
|
|
char *s = get_print_cell ();
|
|
|
|
if (show_inferior_qualified_tids ())
|
|
xsnprintf (s, PRINT_CELL_SIZE, "%d.%d", thr->inf->num, thr->per_inf_num);
|
|
else
|
|
xsnprintf (s, PRINT_CELL_SIZE, "%d", thr->per_inf_num);
|
|
return s;
|
|
}
|
|
|
|
/* Sort an array of struct thread_info pointers by thread ID (first by
|
|
inferior number, and then by per-inferior thread number). Sorts in
|
|
ascending order. */
|
|
|
|
static bool
|
|
tp_array_compar_ascending (const thread_info_ref &a, const thread_info_ref &b)
|
|
{
|
|
if (a->inf->num != b->inf->num)
|
|
return a->inf->num < b->inf->num;
|
|
|
|
return (a->per_inf_num < b->per_inf_num);
|
|
}
|
|
|
|
/* Sort an array of struct thread_info pointers by thread ID (first by
|
|
inferior number, and then by per-inferior thread number). Sorts in
|
|
descending order. */
|
|
|
|
static bool
|
|
tp_array_compar_descending (const thread_info_ref &a, const thread_info_ref &b)
|
|
{
|
|
if (a->inf->num != b->inf->num)
|
|
return a->inf->num > b->inf->num;
|
|
|
|
return (a->per_inf_num > b->per_inf_num);
|
|
}
|
|
|
|
/* Assuming that THR is the current thread, execute CMD.
|
|
FLAGS.QUIET controls the printing of the thread information.
|
|
FLAGS.CONT and FLAGS.SILENT control how to handle errors. Can throw an
|
|
exception if !FLAGS.SILENT and !FLAGS.CONT and CMD fails. */
|
|
|
|
static void
|
|
thr_try_catch_cmd (thread_info *thr, const char *cmd, int from_tty,
|
|
const qcs_flags &flags)
|
|
{
|
|
gdb_assert (is_current_thread (thr));
|
|
|
|
/* The thread header is computed before running the command since
|
|
the command can change the inferior, which is not permitted
|
|
by thread_target_id_str. */
|
|
std::string thr_header =
|
|
string_printf (_("\nThread %s (%s):\n"), print_thread_id (thr),
|
|
thread_target_id_str (thr).c_str ());
|
|
|
|
try
|
|
{
|
|
std::string cmd_result = execute_command_to_string
|
|
(cmd, from_tty, gdb_stdout->term_out ());
|
|
if (!flags.silent || cmd_result.length () > 0)
|
|
{
|
|
if (!flags.quiet)
|
|
printf_filtered ("%s", thr_header.c_str ());
|
|
printf_filtered ("%s", cmd_result.c_str ());
|
|
}
|
|
}
|
|
catch (const gdb_exception_error &ex)
|
|
{
|
|
if (!flags.silent)
|
|
{
|
|
if (!flags.quiet)
|
|
printf_filtered ("%s", thr_header.c_str ());
|
|
if (flags.cont)
|
|
printf_filtered ("%s\n", ex.what ());
|
|
else
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Option definition of "thread apply"'s "-ascending" option. */
|
|
|
|
static const gdb::option::flag_option_def<> ascending_option_def = {
|
|
"ascending",
|
|
N_("\
|
|
Call COMMAND for all threads in ascending order.\n\
|
|
The default is descending order."),
|
|
};
|
|
|
|
/* The qcs command line flags for the "thread apply" commands. Keep
|
|
this in sync with the "frame apply" commands. */
|
|
|
|
using qcs_flag_option_def
|
|
= gdb::option::flag_option_def<qcs_flags>;
|
|
|
|
static const gdb::option::option_def thr_qcs_flags_option_defs[] = {
|
|
qcs_flag_option_def {
|
|
"q", [] (qcs_flags *opt) { return &opt->quiet; },
|
|
N_("Disables printing the thread information."),
|
|
},
|
|
|
|
qcs_flag_option_def {
|
|
"c", [] (qcs_flags *opt) { return &opt->cont; },
|
|
N_("Print any error raised by COMMAND and continue."),
|
|
},
|
|
|
|
qcs_flag_option_def {
|
|
"s", [] (qcs_flags *opt) { return &opt->silent; },
|
|
N_("Silently ignore any errors or empty output produced by COMMAND."),
|
|
},
|
|
};
|
|
|
|
/* Create an option_def_group for the "thread apply all" options, with
|
|
ASCENDING and FLAGS as context. */
|
|
|
|
static inline std::array<gdb::option::option_def_group, 2>
|
|
make_thread_apply_all_options_def_group (bool *ascending,
|
|
qcs_flags *flags)
|
|
{
|
|
return {{
|
|
{ {ascending_option_def.def ()}, ascending},
|
|
{ {thr_qcs_flags_option_defs}, flags },
|
|
}};
|
|
}
|
|
|
|
/* Create an option_def_group for the "thread apply" options, with
|
|
FLAGS as context. */
|
|
|
|
static inline gdb::option::option_def_group
|
|
make_thread_apply_options_def_group (qcs_flags *flags)
|
|
{
|
|
return {{thr_qcs_flags_option_defs}, flags};
|
|
}
|
|
|
|
/* Apply a GDB command to a list of threads. List syntax is a whitespace
|
|
separated list of numbers, or ranges, or the keyword `all'. Ranges consist
|
|
of two numbers separated 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 x/i $pc Apply x/i $pc cmd to all threads. */
|
|
|
|
static void
|
|
thread_apply_all_command (const char *cmd, int from_tty)
|
|
{
|
|
bool ascending = false;
|
|
qcs_flags flags;
|
|
|
|
auto group = make_thread_apply_all_options_def_group (&ascending,
|
|
&flags);
|
|
gdb::option::process_options
|
|
(&cmd, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group);
|
|
|
|
validate_flags_qcs ("thread apply all", &flags);
|
|
|
|
if (cmd == NULL || *cmd == '\000')
|
|
error (_("Please specify a command at the end of 'thread apply all'"));
|
|
|
|
update_thread_list ();
|
|
|
|
int tc = live_threads_count ();
|
|
if (tc != 0)
|
|
{
|
|
/* Save a copy of the thread list and increment each thread's
|
|
refcount while executing the command in the context of each
|
|
thread, in case the command is one that wipes threads. E.g.,
|
|
detach, kill, disconnect, etc., or even normally continuing
|
|
over an inferior or thread exit. */
|
|
std::vector<thread_info_ref> thr_list_cpy;
|
|
thr_list_cpy.reserve (tc);
|
|
|
|
for (thread_info *tp : all_non_exited_threads ())
|
|
thr_list_cpy.push_back (thread_info_ref::new_reference (tp));
|
|
gdb_assert (thr_list_cpy.size () == tc);
|
|
|
|
auto *sorter = (ascending
|
|
? tp_array_compar_ascending
|
|
: tp_array_compar_descending);
|
|
std::sort (thr_list_cpy.begin (), thr_list_cpy.end (), sorter);
|
|
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
for (thread_info_ref &thr : thr_list_cpy)
|
|
if (switch_to_thread_if_alive (thr.get ()))
|
|
thr_try_catch_cmd (thr.get (), cmd, from_tty, flags);
|
|
}
|
|
}
|
|
|
|
/* Completer for "thread apply [ID list]". */
|
|
|
|
static void
|
|
thread_apply_command_completer (cmd_list_element *ignore,
|
|
completion_tracker &tracker,
|
|
const char *text, const char * /*word*/)
|
|
{
|
|
/* Don't leave this to complete_options because there's an early
|
|
return below. */
|
|
tracker.set_use_custom_word_point (true);
|
|
|
|
tid_range_parser parser;
|
|
parser.init (text, current_inferior ()->num);
|
|
|
|
try
|
|
{
|
|
while (!parser.finished ())
|
|
{
|
|
int inf_num, thr_start, thr_end;
|
|
|
|
if (!parser.get_tid_range (&inf_num, &thr_start, &thr_end))
|
|
break;
|
|
|
|
if (parser.in_star_range () || parser.in_thread_range ())
|
|
parser.skip_range ();
|
|
}
|
|
}
|
|
catch (const gdb_exception_error &ex)
|
|
{
|
|
/* get_tid_range throws if it parses a negative number, for
|
|
example. But a seemingly negative number may be the start of
|
|
an option instead. */
|
|
}
|
|
|
|
const char *cmd = parser.cur_tok ();
|
|
|
|
if (cmd == text)
|
|
{
|
|
/* No thread ID list yet. */
|
|
return;
|
|
}
|
|
|
|
/* Check if we're past a valid thread ID list already. */
|
|
if (parser.finished ()
|
|
&& cmd > text && !isspace (cmd[-1]))
|
|
return;
|
|
|
|
/* We're past the thread ID list, advance word point. */
|
|
tracker.advance_custom_word_point_by (cmd - text);
|
|
text = cmd;
|
|
|
|
const auto group = make_thread_apply_options_def_group (nullptr);
|
|
if (gdb::option::complete_options
|
|
(tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group))
|
|
return;
|
|
|
|
complete_nested_command_line (tracker, text);
|
|
}
|
|
|
|
/* Completer for "thread apply all". */
|
|
|
|
static void
|
|
thread_apply_all_command_completer (cmd_list_element *ignore,
|
|
completion_tracker &tracker,
|
|
const char *text, const char *word)
|
|
{
|
|
const auto group = make_thread_apply_all_options_def_group (nullptr,
|
|
nullptr);
|
|
if (gdb::option::complete_options
|
|
(tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group))
|
|
return;
|
|
|
|
complete_nested_command_line (tracker, text);
|
|
}
|
|
|
|
/* Implementation of the "thread apply" command. */
|
|
|
|
static void
|
|
thread_apply_command (const char *tidlist, int from_tty)
|
|
{
|
|
qcs_flags flags;
|
|
const char *cmd = NULL;
|
|
tid_range_parser parser;
|
|
|
|
if (tidlist == NULL || *tidlist == '\000')
|
|
error (_("Please specify a thread ID list"));
|
|
|
|
parser.init (tidlist, current_inferior ()->num);
|
|
while (!parser.finished ())
|
|
{
|
|
int inf_num, thr_start, thr_end;
|
|
|
|
if (!parser.get_tid_range (&inf_num, &thr_start, &thr_end))
|
|
break;
|
|
}
|
|
|
|
cmd = parser.cur_tok ();
|
|
|
|
auto group = make_thread_apply_options_def_group (&flags);
|
|
gdb::option::process_options
|
|
(&cmd, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group);
|
|
|
|
validate_flags_qcs ("thread apply", &flags);
|
|
|
|
if (*cmd == '\0')
|
|
error (_("Please specify a command following the thread ID list"));
|
|
|
|
if (tidlist == cmd || isdigit (cmd[0]))
|
|
invalid_thread_id_error (cmd);
|
|
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
parser.init (tidlist, current_inferior ()->num);
|
|
while (!parser.finished ())
|
|
{
|
|
struct thread_info *tp = NULL;
|
|
struct inferior *inf;
|
|
int inf_num, thr_num;
|
|
|
|
parser.get_tid (&inf_num, &thr_num);
|
|
inf = find_inferior_id (inf_num);
|
|
if (inf != NULL)
|
|
tp = find_thread_id (inf, thr_num);
|
|
|
|
if (parser.in_star_range ())
|
|
{
|
|
if (inf == NULL)
|
|
{
|
|
warning (_("Unknown inferior %d"), inf_num);
|
|
parser.skip_range ();
|
|
continue;
|
|
}
|
|
|
|
/* No use looking for threads past the highest thread number
|
|
the inferior ever had. */
|
|
if (thr_num >= inf->highest_thread_num)
|
|
parser.skip_range ();
|
|
|
|
/* Be quiet about unknown threads numbers. */
|
|
if (tp == NULL)
|
|
continue;
|
|
}
|
|
|
|
if (tp == NULL)
|
|
{
|
|
if (show_inferior_qualified_tids () || parser.tid_is_qualified ())
|
|
warning (_("Unknown thread %d.%d"), inf_num, thr_num);
|
|
else
|
|
warning (_("Unknown thread %d"), thr_num);
|
|
continue;
|
|
}
|
|
|
|
if (!switch_to_thread_if_alive (tp))
|
|
{
|
|
warning (_("Thread %s has terminated."), print_thread_id (tp));
|
|
continue;
|
|
}
|
|
|
|
thr_try_catch_cmd (tp, cmd, from_tty, flags);
|
|
}
|
|
}
|
|
|
|
|
|
/* Implementation of the "taas" command. */
|
|
|
|
static void
|
|
taas_command (const char *cmd, int from_tty)
|
|
{
|
|
if (cmd == NULL || *cmd == '\0')
|
|
error (_("Please specify a command to apply on all threads"));
|
|
std::string expanded = std::string ("thread apply all -s ") + cmd;
|
|
execute_command (expanded.c_str (), from_tty);
|
|
}
|
|
|
|
/* Implementation of the "tfaas" command. */
|
|
|
|
static void
|
|
tfaas_command (const char *cmd, int from_tty)
|
|
{
|
|
if (cmd == NULL || *cmd == '\0')
|
|
error (_("Please specify a command to apply on all frames of all threads"));
|
|
std::string expanded
|
|
= std::string ("thread apply all -s -- frame apply all -s ") + cmd;
|
|
execute_command (expanded.c_str (), from_tty);
|
|
}
|
|
|
|
/* Switch to the specified thread, or print the current thread. */
|
|
|
|
void
|
|
thread_command (const char *tidstr, int from_tty)
|
|
{
|
|
if (tidstr == NULL)
|
|
{
|
|
if (inferior_ptid == null_ptid)
|
|
error (_("No thread selected"));
|
|
|
|
if (target_has_stack ())
|
|
{
|
|
struct thread_info *tp = inferior_thread ();
|
|
|
|
if (tp->state == THREAD_EXITED)
|
|
printf_filtered (_("[Current thread is %s (%s) (exited)]\n"),
|
|
print_thread_id (tp),
|
|
target_pid_to_str (inferior_ptid).c_str ());
|
|
else
|
|
printf_filtered (_("[Current thread is %s (%s)]\n"),
|
|
print_thread_id (tp),
|
|
target_pid_to_str (inferior_ptid).c_str ());
|
|
}
|
|
else
|
|
error (_("No stack."));
|
|
}
|
|
else
|
|
{
|
|
ptid_t previous_ptid = inferior_ptid;
|
|
|
|
thread_select (tidstr, parse_thread_id (tidstr, NULL));
|
|
|
|
/* Print if the thread has not changed, otherwise an event will
|
|
be sent. */
|
|
if (inferior_ptid == previous_ptid)
|
|
{
|
|
print_selected_thread_frame (current_uiout,
|
|
USER_SELECTED_THREAD
|
|
| USER_SELECTED_FRAME);
|
|
}
|
|
else
|
|
{
|
|
gdb::observers::user_selected_context_changed.notify
|
|
(USER_SELECTED_THREAD | USER_SELECTED_FRAME);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Implementation of `thread name'. */
|
|
|
|
static void
|
|
thread_name_command (const char *arg, int from_tty)
|
|
{
|
|
struct thread_info *info;
|
|
|
|
if (inferior_ptid == null_ptid)
|
|
error (_("No thread selected"));
|
|
|
|
arg = skip_spaces (arg);
|
|
|
|
info = inferior_thread ();
|
|
xfree (info->name);
|
|
info->name = arg ? xstrdup (arg) : NULL;
|
|
}
|
|
|
|
/* Find thread ids with a name, target pid, or extra info matching ARG. */
|
|
|
|
static void
|
|
thread_find_command (const char *arg, int from_tty)
|
|
{
|
|
const char *tmp;
|
|
unsigned long match = 0;
|
|
|
|
if (arg == NULL || *arg == '\0')
|
|
error (_("Command requires an argument."));
|
|
|
|
tmp = re_comp (arg);
|
|
if (tmp != 0)
|
|
error (_("Invalid regexp (%s): %s"), tmp, arg);
|
|
|
|
/* We're going to be switching threads. */
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
update_thread_list ();
|
|
|
|
for (thread_info *tp : all_threads ())
|
|
{
|
|
switch_to_inferior_no_thread (tp->inf);
|
|
|
|
if (tp->name != NULL && re_exec (tp->name))
|
|
{
|
|
printf_filtered (_("Thread %s has name '%s'\n"),
|
|
print_thread_id (tp), tp->name);
|
|
match++;
|
|
}
|
|
|
|
tmp = target_thread_name (tp);
|
|
if (tmp != NULL && re_exec (tmp))
|
|
{
|
|
printf_filtered (_("Thread %s has target name '%s'\n"),
|
|
print_thread_id (tp), tmp);
|
|
match++;
|
|
}
|
|
|
|
std::string name = target_pid_to_str (tp->ptid);
|
|
if (!name.empty () && re_exec (name.c_str ()))
|
|
{
|
|
printf_filtered (_("Thread %s has target id '%s'\n"),
|
|
print_thread_id (tp), name.c_str ());
|
|
match++;
|
|
}
|
|
|
|
tmp = target_extra_thread_info (tp);
|
|
if (tmp != NULL && re_exec (tmp))
|
|
{
|
|
printf_filtered (_("Thread %s has extra info '%s'\n"),
|
|
print_thread_id (tp), tmp);
|
|
match++;
|
|
}
|
|
}
|
|
if (!match)
|
|
printf_filtered (_("No threads match '%s'\n"), arg);
|
|
}
|
|
|
|
/* Print notices when new threads are attached and detached. */
|
|
bool print_thread_events = true;
|
|
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);
|
|
}
|
|
|
|
/* See gdbthread.h. */
|
|
|
|
void
|
|
thread_select (const char *tidstr, thread_info *tp)
|
|
{
|
|
if (!switch_to_thread_if_alive (tp))
|
|
error (_("Thread ID %s has terminated."), tidstr);
|
|
|
|
annotate_thread_changed ();
|
|
|
|
/* Since the current thread may have changed, see if there is any
|
|
exited thread we can now delete. */
|
|
delete_exited_threads ();
|
|
}
|
|
|
|
/* Print thread and frame switch command response. */
|
|
|
|
void
|
|
print_selected_thread_frame (struct ui_out *uiout,
|
|
user_selected_what selection)
|
|
{
|
|
struct thread_info *tp = inferior_thread ();
|
|
|
|
if (selection & USER_SELECTED_THREAD)
|
|
{
|
|
if (uiout->is_mi_like_p ())
|
|
{
|
|
uiout->field_signed ("new-thread-id",
|
|
inferior_thread ()->global_num);
|
|
}
|
|
else
|
|
{
|
|
uiout->text ("[Switching to thread ");
|
|
uiout->field_string ("new-thread-id", print_thread_id (tp));
|
|
uiout->text (" (");
|
|
uiout->text (target_pid_to_str (inferior_ptid).c_str ());
|
|
uiout->text (")]");
|
|
}
|
|
}
|
|
|
|
if (tp->state == THREAD_RUNNING)
|
|
{
|
|
if (selection & USER_SELECTED_THREAD)
|
|
uiout->text ("(running)\n");
|
|
}
|
|
else if (selection & USER_SELECTED_FRAME)
|
|
{
|
|
if (selection & USER_SELECTED_THREAD)
|
|
uiout->text ("\n");
|
|
|
|
if (has_stack_frames ())
|
|
print_stack_frame_to_uiout (uiout, get_selected_frame (NULL),
|
|
1, SRC_AND_LOC, 1);
|
|
}
|
|
}
|
|
|
|
/* Update the 'threads_executing' global based on the threads we know
|
|
about right now. This is used by infrun to tell whether we should
|
|
pull events out of the current target. */
|
|
|
|
static void
|
|
update_threads_executing (void)
|
|
{
|
|
process_stratum_target *targ = current_inferior ()->process_target ();
|
|
|
|
if (targ == NULL)
|
|
return;
|
|
|
|
targ->threads_executing = false;
|
|
|
|
for (inferior *inf : all_non_exited_inferiors (targ))
|
|
{
|
|
if (!inf->has_execution ())
|
|
continue;
|
|
|
|
/* If the process has no threads, then it must be we have a
|
|
process-exit event pending. */
|
|
if (inf->thread_list == NULL)
|
|
{
|
|
targ->threads_executing = true;
|
|
return;
|
|
}
|
|
|
|
for (thread_info *tp : inf->non_exited_threads ())
|
|
{
|
|
if (tp->executing)
|
|
{
|
|
targ->threads_executing = true;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
update_thread_list (void)
|
|
{
|
|
target_update_thread_list ();
|
|
update_threads_executing ();
|
|
}
|
|
|
|
/* Return a new value for the selected thread's id. Return a value of
|
|
0 if no thread is selected. If GLOBAL is true, return the thread's
|
|
global number. Otherwise return the per-inferior number. */
|
|
|
|
static struct value *
|
|
thread_num_make_value_helper (struct gdbarch *gdbarch, int global)
|
|
{
|
|
int int_val;
|
|
|
|
if (inferior_ptid == null_ptid)
|
|
int_val = 0;
|
|
else
|
|
{
|
|
thread_info *tp = inferior_thread ();
|
|
if (global)
|
|
int_val = tp->global_num;
|
|
else
|
|
int_val = tp->per_inf_num;
|
|
}
|
|
|
|
return value_from_longest (builtin_type (gdbarch)->builtin_int, int_val);
|
|
}
|
|
|
|
/* Return a new value for the selected thread's per-inferior thread
|
|
number. Return a value of 0 if no thread is selected, or no
|
|
threads exist. */
|
|
|
|
static struct value *
|
|
thread_id_per_inf_num_make_value (struct gdbarch *gdbarch,
|
|
struct internalvar *var,
|
|
void *ignore)
|
|
{
|
|
return thread_num_make_value_helper (gdbarch, 0);
|
|
}
|
|
|
|
/* Return a new value for the selected thread's global id. Return a
|
|
value of 0 if no thread is selected, or no threads exist. */
|
|
|
|
static struct value *
|
|
global_thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var,
|
|
void *ignore)
|
|
{
|
|
return thread_num_make_value_helper (gdbarch, 1);
|
|
}
|
|
|
|
/* Commands with a prefix of `thread'. */
|
|
struct cmd_list_element *thread_cmd_list = NULL;
|
|
|
|
/* Implementation of `thread' variable. */
|
|
|
|
static const struct internalvar_funcs thread_funcs =
|
|
{
|
|
thread_id_per_inf_num_make_value,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
/* Implementation of `gthread' variable. */
|
|
|
|
static const struct internalvar_funcs gthread_funcs =
|
|
{
|
|
global_thread_id_make_value,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
void _initialize_thread ();
|
|
void
|
|
_initialize_thread ()
|
|
{
|
|
static struct cmd_list_element *thread_apply_list = NULL;
|
|
cmd_list_element *c;
|
|
|
|
const auto info_threads_opts = make_info_threads_options_def_group (nullptr);
|
|
|
|
/* Note: keep this "ID" in sync with what "info threads [TAB]"
|
|
suggests. */
|
|
static std::string info_threads_help
|
|
= gdb::option::build_help (_("\
|
|
Display currently known threads.\n\
|
|
Usage: info threads [OPTION]... [ID]...\n\
|
|
If ID is given, it is a space-separated list of IDs of threads to display.\n\
|
|
Otherwise, all threads are displayed.\n\
|
|
\n\
|
|
Options:\n\
|
|
%OPTIONS%"),
|
|
info_threads_opts);
|
|
|
|
c = add_info ("threads", info_threads_command, info_threads_help.c_str ());
|
|
set_cmd_completer_handle_brkchars (c, info_threads_command_completer);
|
|
|
|
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);
|
|
|
|
#define THREAD_APPLY_OPTION_HELP "\
|
|
Prints per-inferior thread number and target system's thread id\n\
|
|
followed by COMMAND output.\n\
|
|
\n\
|
|
By default, an error raised during the execution of COMMAND\n\
|
|
aborts \"thread apply\".\n\
|
|
\n\
|
|
Options:\n\
|
|
%OPTIONS%"
|
|
|
|
const auto thread_apply_opts = make_thread_apply_options_def_group (nullptr);
|
|
|
|
static std::string thread_apply_help = gdb::option::build_help (_("\
|
|
Apply a command to a list of threads.\n\
|
|
Usage: thread apply ID... [OPTION]... COMMAND\n\
|
|
ID is a space-separated list of IDs of threads to apply COMMAND on.\n"
|
|
THREAD_APPLY_OPTION_HELP),
|
|
thread_apply_opts);
|
|
|
|
c = add_prefix_cmd ("apply", class_run, thread_apply_command,
|
|
thread_apply_help.c_str (),
|
|
&thread_apply_list, "thread apply ", 1,
|
|
&thread_cmd_list);
|
|
set_cmd_completer_handle_brkchars (c, thread_apply_command_completer);
|
|
|
|
const auto thread_apply_all_opts
|
|
= make_thread_apply_all_options_def_group (nullptr, nullptr);
|
|
|
|
static std::string thread_apply_all_help = gdb::option::build_help (_("\
|
|
Apply a command to all threads.\n\
|
|
\n\
|
|
Usage: thread apply all [OPTION]... COMMAND\n"
|
|
THREAD_APPLY_OPTION_HELP),
|
|
thread_apply_all_opts);
|
|
|
|
c = add_cmd ("all", class_run, thread_apply_all_command,
|
|
thread_apply_all_help.c_str (),
|
|
&thread_apply_list);
|
|
set_cmd_completer_handle_brkchars (c, thread_apply_all_command_completer);
|
|
|
|
c = add_com ("taas", class_run, taas_command, _("\
|
|
Apply a command to all threads (ignoring errors and empty output).\n\
|
|
Usage: taas [OPTION]... COMMAND\n\
|
|
shortcut for 'thread apply all -s [OPTION]... COMMAND'\n\
|
|
See \"help thread apply all\" for available options."));
|
|
set_cmd_completer_handle_brkchars (c, thread_apply_all_command_completer);
|
|
|
|
c = add_com ("tfaas", class_run, tfaas_command, _("\
|
|
Apply a command to all frames of all threads (ignoring errors and empty output).\n\
|
|
Usage: tfaas [OPTION]... COMMAND\n\
|
|
shortcut for 'thread apply all -s -- frame apply all -s [OPTION]... COMMAND'\n\
|
|
See \"help frame apply all\" for available options."));
|
|
set_cmd_completer_handle_brkchars (c, frame_apply_all_cmd_completer);
|
|
|
|
add_cmd ("name", class_run, thread_name_command,
|
|
_("Set the current thread's name.\n\
|
|
Usage: thread name [NAME]\n\
|
|
If NAME is not given, then any existing name is removed."), &thread_cmd_list);
|
|
|
|
add_cmd ("find", class_run, thread_find_command, _("\
|
|
Find threads that match a regular expression.\n\
|
|
Usage: thread find REGEXP\n\
|
|
Will display thread ids whose name, target ID, or extra info matches REGEXP."),
|
|
&thread_cmd_list);
|
|
|
|
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);
|
|
|
|
create_internalvar_type_lazy ("_thread", &thread_funcs, NULL);
|
|
create_internalvar_type_lazy ("_gthread", >hread_funcs, NULL);
|
|
}
|