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53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/* Check that error checking mutexes are not subject to lock elision.
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Copyright (C) 2016-2020 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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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <errno.h>
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#include <time.h>
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#include <pthread.h>
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#include <support/check.h>
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static int
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do_test (void)
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{
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struct timespec tms = { 0 };
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pthread_mutex_t mutex;
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pthread_mutexattr_t mutexattr;
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int ret = 0;
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TEST_COMPARE (pthread_mutexattr_init (&mutexattr), 0);
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TEST_COMPARE (pthread_mutexattr_settype (&mutexattr,
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PTHREAD_MUTEX_ERRORCHECK), 0);
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TEST_COMPARE (pthread_mutex_init (&mutex, &mutexattr), 0);
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TEST_COMPARE (pthread_mutexattr_destroy (&mutexattr), 0);
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/* The call to pthread_mutex_timedlock erroneously enabled lock elision
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on the mutex, which then triggered an assertion failure in
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pthread_mutex_unlock. It would also defeat the error checking nature
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of the mutex. */
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TEST_COMPARE (pthread_mutex_timedlock (&mutex, &tms), 0);
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TEST_COMPARE (pthread_mutex_timedlock (&mutex, &tms), EDEADLK);
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TEST_COMPARE (pthread_mutex_unlock (&mutex), 0);
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return ret;
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}
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#include <support/test-driver.c>
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