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/* Block signals used by gdb
Copyright (C) 2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef GDBSUPPORT_BLOCK_SIGNALS_H
#define GDBSUPPORT_BLOCK_SIGNALS_H
#include <signal.h>
#include "gdbsupport/gdb-sigmask.h"
namespace gdb
{
/* This is an RAII class that temporarily blocks the signals needed by
gdb. This can be used before starting a new thread to ensure that
this thread starts with the appropriate signals blocked. */
class block_signals
{
public:
block_signals ()
{
#ifdef HAVE_SIGPROCMASK
sigset_t mask;
sigemptyset (&mask);
sigaddset (&mask, SIGINT);
sigaddset (&mask, SIGCHLD);
sigaddset (&mask, SIGALRM);
sigaddset (&mask, SIGWINCH);
gdb_sigmask (SIG_BLOCK, &mask, &m_old_mask);
#endif
}
~block_signals ()
{
#ifdef HAVE_SIGPROCMASK
gdb_sigmask (SIG_SETMASK, &m_old_mask, nullptr);
#endif
}
DISABLE_COPY_AND_ASSIGN (block_signals);
private:
#ifdef HAVE_SIGPROCMASK
sigset_t m_old_mask;
#endif
};
}
#endif /* GDBSUPPORT_BLOCK_SIGNALS_H */
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