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/* $NetBSD: t_preempt.c,v 1.2 2010/11/03 16:10:22 christos Exp $ */
/*
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__COPYRIGHT("@(#) Copyright (c) 2008\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_preempt.c,v 1.2 2010/11/03 16:10:22 christos Exp $");
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <atf-c.h>
#include "h_common.h"
pthread_mutex_t mutex;
pthread_cond_t cond;
int started;
#define HUGE_BUFFER 1<<20
#define NTHREADS 1
static void *
threadfunc(void *arg)
{
printf("2: Second thread.\n");
printf("2: Locking mutex\n");
PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
printf("2: Got mutex.\n");
started++;
PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
PTHREAD_REQUIRE(pthread_cond_signal(&cond));
sleep(1);
return NULL;
}
ATF_TC(preempt1);
ATF_TC_HEAD(preempt1, tc)
{
atf_tc_set_md_var(tc, "descr",
"Checks kernel preemption during a large uiomove");
}
ATF_TC_BODY(preempt1, tc)
{
int i;
ssize_t rv;
pthread_t new;
void *joinval;
char *mem;
int fd;
mem = malloc(HUGE_BUFFER);
ATF_REQUIRE_MSG(mem != NULL, "%s", strerror(errno));
fd = open("/dev/urandom", O_RDONLY, 0);
ATF_REQUIRE_MSG(fd != -1, "%s", strerror(errno));
printf("1: preempt test\n");
PTHREAD_REQUIRE(pthread_cond_init(&cond, NULL));
PTHREAD_REQUIRE(pthread_mutex_init(&mutex, NULL));
PTHREAD_REQUIRE(pthread_mutex_lock(&mutex));
started = 0;
for (i = 0; i < NTHREADS; i++) {
PTHREAD_REQUIRE(pthread_create(&new, NULL, threadfunc, NULL));
}
while (started < NTHREADS) {
PTHREAD_REQUIRE(pthread_cond_wait(&cond, &mutex));
}
printf("1: Thread has started.\n");
PTHREAD_REQUIRE(pthread_mutex_unlock(&mutex));
printf("1: After releasing the mutex.\n");
rv = read(fd, mem, HUGE_BUFFER);
close(fd);
ATF_REQUIRE_EQ(rv, HUGE_BUFFER);
PTHREAD_REQUIRE(pthread_join(new, &joinval));
printf("1: Thread joined.\n");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, preempt1);
return atf_no_error();
}
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