mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/* Temporarily install an alternate signal stack
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Copyright (C) 2019-2024 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_ALT_STACK_H
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#define GDBSUPPORT_ALT_STACK_H
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#include <signal.h>
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namespace gdb
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{
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/* Try to set up an alternate signal stack for SIGSEGV handlers.
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This allows us to handle SIGSEGV signals generated when the
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normal process stack is exhausted. If this stack is not set
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up (sigaltstack is unavailable or fails) and a SIGSEGV is
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generated when the normal stack is exhausted then the program
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will behave as though no SIGSEGV handler was installed. */
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class alternate_signal_stack
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{
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public:
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alternate_signal_stack ()
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{
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#ifdef HAVE_SIGALTSTACK
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m_stack.reset ((char *) xmalloc (SIGSTKSZ));
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stack_t stack;
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stack.ss_sp = m_stack.get ();
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stack.ss_size = SIGSTKSZ;
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stack.ss_flags = 0;
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sigaltstack (&stack, &m_old_stack);
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#endif
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}
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~alternate_signal_stack ()
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{
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#ifdef HAVE_SIGALTSTACK
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sigaltstack (&m_old_stack, nullptr);
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#endif
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}
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DISABLE_COPY_AND_ASSIGN (alternate_signal_stack);
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private:
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#ifdef HAVE_SIGALTSTACK
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gdb::unique_xmalloc_ptr<char> m_stack;
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stack_t m_old_stack;
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#endif
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};
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}
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#endif /* GDBSUPPORT_ALT_STACK_H */
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