mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-23 18:14:13 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
/* Copyright (C) 2016-2024 Free Software Foundation, Inc.
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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 "common-defs.h"
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#include "signals-state-save-restore.h"
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#include "gdbsupport/gdb-sigmask.h"
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#include <signal.h>
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/* The original signal actions and mask. */
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#ifdef HAVE_SIGACTION
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static struct sigaction original_signal_actions[NSIG];
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static sigset_t original_signal_mask;
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#endif
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/* See signals-state-save-restore.h. */
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void
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save_original_signals_state (bool quiet)
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{
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#ifdef HAVE_SIGACTION
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int i;
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int res;
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res = gdb_sigmask (0, NULL, &original_signal_mask);
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if (res == -1)
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perror_with_name (("sigprocmask"));
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bool found_preinstalled = false;
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for (i = 1; i < NSIG; i++)
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{
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struct sigaction *oldact = &original_signal_actions[i];
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res = sigaction (i, NULL, oldact);
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if (res == -1 && errno == EINVAL)
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{
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/* Some signal numbers in the range are invalid. */
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continue;
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}
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else if (res == -1)
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perror_with_name (("sigaction"));
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/* If we find a custom signal handler already installed, then
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this function was called too late. This is a warning instead
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of an internal error because this can also happen if you
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LD_PRELOAD a library that installs a signal handler early via
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__attribute__((constructor)), like libSegFault.so. */
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if (!quiet
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&& oldact->sa_handler != SIG_DFL
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&& oldact->sa_handler != SIG_IGN)
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{
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found_preinstalled = true;
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/* Use raw fprintf here because we're being called in early
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startup, before GDB's filtered streams are created. */
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fprintf (stderr,
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_("warning: Found custom handler for signal "
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"%d (%s) preinstalled.\n"), i,
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strsignal (i));
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}
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}
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if (found_preinstalled)
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{
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fprintf (stderr, _("\
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Some signal dispositions inherited from the environment (SIG_DFL/SIG_IGN)\n\
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won't be propagated to spawned programs.\n"));
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}
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#endif
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}
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/* See signals-state-save-restore.h. */
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void
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restore_original_signals_state (void)
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{
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#ifdef HAVE_SIGACTION
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int i;
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int res;
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for (i = 1; i < NSIG; i++)
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{
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res = sigaction (i, &original_signal_actions[i], NULL);
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if (res == -1 && errno == EINVAL)
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{
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/* Some signal numbers in the range are invalid. */
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continue;
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}
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else if (res == -1)
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perror_with_name (("sigaction"));
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}
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res = gdb_sigmask (SIG_SETMASK, &original_signal_mask, NULL);
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if (res == -1)
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perror_with_name (("sigprocmask"));
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#endif
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}
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