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