| 1 | /* Block signals used by gdb |
| 2 | |
| 3 | Copyright (C) 2019-2021 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef GDBSUPPORT_BLOCK_SIGNALS_H |
| 21 | #define GDBSUPPORT_BLOCK_SIGNALS_H |
| 22 | |
| 23 | #include <signal.h> |
| 24 | |
| 25 | #include "gdbsupport/gdb-sigmask.h" |
| 26 | |
| 27 | namespace gdb |
| 28 | { |
| 29 | |
| 30 | /* This is an RAII class that temporarily blocks the signals needed by |
| 31 | gdb. This can be used before starting a new thread to ensure that |
| 32 | this thread starts with the appropriate signals blocked. */ |
| 33 | class block_signals |
| 34 | { |
| 35 | public: |
| 36 | block_signals () |
| 37 | { |
| 38 | #ifdef HAVE_SIGPROCMASK |
| 39 | sigset_t mask; |
| 40 | sigemptyset (&mask); |
| 41 | sigaddset (&mask, SIGINT); |
| 42 | sigaddset (&mask, SIGCHLD); |
| 43 | sigaddset (&mask, SIGALRM); |
| 44 | sigaddset (&mask, SIGWINCH); |
| 45 | gdb_sigmask (SIG_BLOCK, &mask, &m_old_mask); |
| 46 | #endif |
| 47 | } |
| 48 | |
| 49 | ~block_signals () |
| 50 | { |
| 51 | #ifdef HAVE_SIGPROCMASK |
| 52 | gdb_sigmask (SIG_SETMASK, &m_old_mask, nullptr); |
| 53 | #endif |
| 54 | } |
| 55 | |
| 56 | DISABLE_COPY_AND_ASSIGN (block_signals); |
| 57 | |
| 58 | private: |
| 59 | |
| 60 | #ifdef HAVE_SIGPROCMASK |
| 61 | sigset_t m_old_mask; |
| 62 | #endif |
| 63 | }; |
| 64 | |
| 65 | } |
| 66 | |
| 67 | #endif /* GDBSUPPORT_BLOCK_SIGNALS_H */ |