glibc/nptl/tst-cond25.c
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2018-01-01 00:32:25 +00:00

290 lines
6.8 KiB
C

/* Verify that condition variables synchronized by PI mutexes don't hang on
on cancellation.
Copyright (C) 2012-2018 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 <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#define NUM 5
#define ITERS 10000
#define COUNT 100
typedef void *(*thr_func) (void *);
pthread_mutex_t mutex;
pthread_cond_t cond;
void cleanup (void *u)
{
/* pthread_cond_wait should always return with the mutex locked. The
pthread_mutex_unlock implementation does not actually check whether we
own the mutex for several mutex kinds, so check this explicitly. */
int ret = pthread_mutex_trylock (&mutex);
if (ret != EDEADLK && ret != EBUSY)
{
printf ("mutex not locked in cleanup %d\n", ret);
abort ();
}
if (pthread_mutex_unlock (&mutex))
abort ();
}
void *
signaller (void *u)
{
int i, ret = 0;
void *tret = NULL;
for (i = 0; i < ITERS; i++)
{
if ((ret = pthread_mutex_lock (&mutex)) != 0)
{
tret = (void *)1;
printf ("signaller:mutex_lock failed: %s\n", strerror (ret));
goto out;
}
if ((ret = pthread_cond_signal (&cond)) != 0)
{
tret = (void *)1;
printf ("signaller:signal failed: %s\n", strerror (ret));
goto unlock_out;
}
if ((ret = pthread_mutex_unlock (&mutex)) != 0)
{
tret = (void *)1;
printf ("signaller:mutex_unlock failed: %s\n", strerror (ret));
goto out;
}
pthread_testcancel ();
}
out:
return tret;
unlock_out:
if ((ret = pthread_mutex_unlock (&mutex)) != 0)
printf ("signaller:mutex_unlock[2] failed: %s\n", strerror (ret));
goto out;
}
void *
waiter (void *u)
{
int i, ret = 0;
void *tret = NULL;
int seq = (uintptr_t) u;
for (i = 0; i < ITERS / NUM; i++)
{
if ((ret = pthread_mutex_lock (&mutex)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("waiter[%u]:mutex_lock failed: %s\n", seq, strerror (ret));
goto out;
}
pthread_cleanup_push (cleanup, NULL);
if ((ret = pthread_cond_wait (&cond, &mutex)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("waiter[%u]:wait failed: %s\n", seq, strerror (ret));
goto unlock_out;
}
if ((ret = pthread_mutex_unlock (&mutex)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("waiter[%u]:mutex_unlock failed: %s\n", seq, strerror (ret));
goto out;
}
pthread_cleanup_pop (0);
}
out:
puts ("waiter tests done");
return tret;
unlock_out:
if ((ret = pthread_mutex_unlock (&mutex)) != 0)
printf ("waiter:mutex_unlock[2] failed: %s\n", strerror (ret));
goto out;
}
void *
timed_waiter (void *u)
{
int i, ret;
void *tret = NULL;
int seq = (uintptr_t) u;
for (i = 0; i < ITERS / NUM; i++)
{
struct timespec ts;
if ((ret = clock_gettime(CLOCK_REALTIME, &ts)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("%u:clock_gettime failed: %s\n", seq, strerror (errno));
goto out;
}
ts.tv_sec += 20;
if ((ret = pthread_mutex_lock (&mutex)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("waiter[%u]:mutex_lock failed: %s\n", seq, strerror (ret));
goto out;
}
pthread_cleanup_push (cleanup, NULL);
/* We should not time out either. */
if ((ret = pthread_cond_timedwait (&cond, &mutex, &ts)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("waiter[%u]:timedwait failed: %s\n", seq, strerror (ret));
goto unlock_out;
}
if ((ret = pthread_mutex_unlock (&mutex)) != 0)
{
tret = (void *) (uintptr_t) 1;
printf ("waiter[%u]:mutex_unlock failed: %s\n", seq, strerror (ret));
goto out;
}
pthread_cleanup_pop (0);
}
out:
puts ("timed_waiter tests done");
return tret;
unlock_out:
if ((ret = pthread_mutex_unlock (&mutex)) != 0)
printf ("waiter[%u]:mutex_unlock[2] failed: %s\n", seq, strerror (ret));
goto out;
}
int
do_test_wait (thr_func f)
{
pthread_t w[NUM];
pthread_t s;
pthread_mutexattr_t attr;
int i, j, ret = 0;
void *thr_ret;
for (i = 0; i < COUNT; i++)
{
if ((ret = pthread_mutexattr_init (&attr)) != 0)
{
printf ("mutexattr_init failed: %s\n", strerror (ret));
goto out;
}
if ((ret = pthread_mutexattr_setprotocol (&attr,
PTHREAD_PRIO_INHERIT)) != 0)
{
printf ("mutexattr_setprotocol failed: %s\n", strerror (ret));
goto out;
}
if ((ret = pthread_cond_init (&cond, NULL)) != 0)
{
printf ("cond_init failed: %s\n", strerror (ret));
goto out;
}
if ((ret = pthread_mutex_init (&mutex, &attr)) != 0)
{
printf ("mutex_init failed: %s\n", strerror (ret));
goto out;
}
for (j = 0; j < NUM; j++)
if ((ret = pthread_create (&w[j], NULL,
f, (void *) (uintptr_t) j)) != 0)
{
printf ("waiter[%d]: create failed: %s\n", j, strerror (ret));
goto out;
}
if ((ret = pthread_create (&s, NULL, signaller, NULL)) != 0)
{
printf ("signaller: create failed: %s\n", strerror (ret));
goto out;
}
for (j = 0; j < NUM; j++)
{
pthread_cancel (w[j]);
if ((ret = pthread_join (w[j], &thr_ret)) != 0)
{
printf ("waiter[%d]: join failed: %s\n", j, strerror (ret));
goto out;
}
if (thr_ret != NULL && thr_ret != PTHREAD_CANCELED)
{
ret = 1;
goto out;
}
}
/* The signalling thread could have ended before it was cancelled. */
pthread_cancel (s);
if ((ret = pthread_join (s, &thr_ret)) != 0)
{
printf ("signaller: join failed: %s\n", strerror (ret));
goto out;
}
if (thr_ret != NULL && thr_ret != PTHREAD_CANCELED)
{
ret = 1;
goto out;
}
}
out:
return ret;
}
int
do_test (int argc, char **argv)
{
int ret = do_test_wait (waiter);
if (ret)
return ret;
return do_test_wait (timed_waiter);
}
#define TIMEOUT 5
#include "../test-skeleton.c"