1 /* Block signals used by gdb 2 3 Copyright (C) 2019-2023 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 sigaddset (&mask, SIGTERM); 46 gdb_sigmask (SIG_BLOCK, &mask, &m_old_mask); 47 #endif 48 } 49 50 ~block_signals () 51 { 52 #ifdef HAVE_SIGPROCMASK 53 gdb_sigmask (SIG_SETMASK, &m_old_mask, nullptr); 54 #endif 55 } 56 57 DISABLE_COPY_AND_ASSIGN (block_signals); 58 59 private: 60 61 #ifdef HAVE_SIGPROCMASK 62 sigset_t m_old_mask; 63 #endif 64 }; 65 66 } 67 68 #endif /* GDBSUPPORT_BLOCK_SIGNALS_H */ 69