forked from Imagelibrary/binutils-gdb
236bb4b23d
This adds configury support and an RAII class that can be used to temporarily block signals that are used by gdb. (This class is not used in this patch, but it split out for easier review.) The idea of this patch is that these signals should only be delivered to the main thread. So, when creating a background thread, they are temporarily blocked; the blocked state is inherited by the new thread. gdb/ChangeLog 2019-09-30 Tom Tromey <tom@tromey.com> * gdbsupport/common.m4 (GDB_AC_COMMON): Check for pthread_sigmask. * configure: Rebuild. * gdbsupport/block-signals.h: New file. gdb/gdbserver/ChangeLog 2019-09-30 Tom Tromey <tom@tromey.com> * configure: Rebuild.
66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
/* Block signals used by gdb
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Copyright (C) 2019 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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#ifndef GDBSUPPORT_BLOCK_SIGNALS_H
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#define GDBSUPPORT_BLOCK_SIGNALS_H
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#include <signal.h>
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namespace gdb
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{
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/* This is an RAII class that temporarily blocks the signals needed by
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gdb. This can be used before starting a new thread to ensure that
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this thread starts with the appropriate signals blocked. */
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class block_signals
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{
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public:
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block_signals ()
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{
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#ifdef HAVE_PTHREAD_SIGMASK
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sigset_t mask;
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sigemptyset (&mask);
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sigaddset (&mask, SIGINT);
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sigaddset (&mask, SIGCHLD);
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sigaddset (&mask, SIGALRM);
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sigaddset (&mask, SIGWINCH);
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pthread_sigmask (SIG_BLOCK, &mask, &m_old_mask);
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#endif
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}
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~block_signals ()
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{
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#ifdef HAVE_PTHREAD_SIGMASK
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pthread_sigmask (SIG_SETMASK, &m_old_mask, nullptr);
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#endif
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}
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DISABLE_COPY_AND_ASSIGN (block_signals);
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private:
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#ifdef HAVE_PTHREAD_SIGMASK
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sigset_t m_old_mask;
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#endif
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};
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}
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#endif /* GDBSUPPORT_BLOCK_SIGNALS_H */
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