diff options
Diffstat (limited to 'gdbsupport/block-signals.h')
-rw-r--r-- | gdbsupport/block-signals.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/gdbsupport/block-signals.h b/gdbsupport/block-signals.h new file mode 100644 index 00000000000..24c971f2d33 --- /dev/null +++ b/gdbsupport/block-signals.h @@ -0,0 +1,67 @@ +/* Block signals used by gdb + + Copyright (C) 2019-2020 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 */ |