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