108 lines
2.9 KiB
Bash
Executable File
108 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
#
|
|
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
#
|
|
# Copyright (c) 2019 Dell EMC Isilon
|
|
#
|
|
# 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 AUTHOR 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 AUTHOR 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.
|
|
#
|
|
|
|
# No problems seen.
|
|
|
|
cat > /tmp/sem_post.c <<EOF
|
|
#include <err.h>
|
|
#include <pthread.h>
|
|
#include <semaphore.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
static sem_t semaphore;
|
|
|
|
static void *
|
|
threadfunc(void *data __unused) {
|
|
|
|
for (;;) {
|
|
usleep(arc4random() % 100);
|
|
if (sem_wait(&semaphore) == -1)
|
|
err(1, "sem_wait");
|
|
usleep(arc4random() % 100);
|
|
if (arc4random() % 100 < 3)
|
|
sleep(1);
|
|
if (sem_post(&semaphore) == -1)
|
|
err(1, "sem_post");
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
main(void) {
|
|
pthread_t mythread;
|
|
time_t start;
|
|
int r;
|
|
|
|
// initialize semaphore and set value to 1
|
|
if (sem_init(&semaphore, 0, 1) == -1)
|
|
err(1, "sem_init");
|
|
|
|
r = pthread_create(&mythread, NULL, threadfunc, NULL);
|
|
if (r != 0)
|
|
errc(1, r, "pthread_create");
|
|
|
|
usleep(50);
|
|
alarm(300);
|
|
start = time(NULL);
|
|
while (time(NULL) - start < 120) {
|
|
usleep(arc4random() % 100);
|
|
if (sem_wait(&semaphore) == -1)
|
|
err(1, "sem_wait");
|
|
usleep(arc4random() % 100);
|
|
if (arc4random() % 100 < 3)
|
|
sleep(1);
|
|
if (sem_post(&semaphore) == -1)
|
|
err(1, "sem_post");
|
|
}
|
|
if ((r = pthread_kill(mythread, SIGINT)) != 0)
|
|
errc(1, r, "pthread_kill");
|
|
if ((r = pthread_join(mythread, NULL)) != 0)
|
|
errc(1, r, "pthread_join");
|
|
|
|
return (0);
|
|
}
|
|
EOF
|
|
cc -o /tmp/sem_post -Wall -Wextra -O2 /tmp/sem_post.c -lpthread || exit 1
|
|
(cd ../testcases/swap; ./swap -t 3m -i 30 -h -l 100) &
|
|
sleep 20
|
|
for i in `jot 128`; do
|
|
/tmp/sem_post > /dev/null &
|
|
done
|
|
while pgrep -q sem_post; do sleep .5; done
|
|
while pkill swap; do :; done
|
|
wait
|
|
rm -f /tmp/sem_post /tmp/sem_post.c
|
|
exit 0
|