glibc/stdlib/quick_exit.c
Carlos O'Donell 47dd3543d3 Bug 20198: quick_exit should not call destructors.
In C++11 18.5.12 says "Objects shall not be destroyed as a
result of calling quick_exit." In C11 quick_exit is silent
about thread object destruction. Therefore to make glibc
C++ compliant we do not call any thread local destructors.
A new regression test verifies the fix.

I will note that C++11 18.5.3 makes it clear that C++
defines additional requirements for _Exit() to prevent it
from executing destructors.

Given that the point of _Exit() is to terminate the process
immediately it makes sense the C and C++ should line up
and avoid calling destructors.

No failures. New regtest passes.
2016-06-06 21:40:25 -04:00

49 lines
1.7 KiB
C

/* Copyright (C) 2009-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sysdep.h>
#include <signal.h>
#include <errno.h>
#include <shlib-compat.h>
#include "exit.h"
void
__new_quick_exit (int status)
{
/* The new quick_exit, following C++11 18.5.12, does not run object
destructors. While C11 says nothing about object destructors,
since it has none, the intent is to run the registered
at_quick_exit handlers and then run _Exit immediately without
disturbing the state of the process and threads. */
__run_exit_handlers (status, &__quick_exit_funcs, false, false);
}
versioned_symbol (libc, __new_quick_exit, quick_exit, GLIBC_2_24);
#if SHLIB_COMPAT(libc, GLIBC_2_10, GLIBC_2_24)
void
attribute_compat_text_section
__old_quick_exit (int status)
{
/* The old quick_exit runs thread_local destructors. */
__run_exit_handlers (status, &__quick_exit_funcs, false, true);
}
compat_symbol (libc, __old_quick_exit, quick_exit, GLIBC_2_10);
#endif