#!/bin/sh
#
# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org>
# 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 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.
#
# Regression test for panic in semexit_myhook
# Test scenario by kib@
. ../default.cfg
odir=`pwd`
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > sem.c
mycc -o sem -Wall sem.c
rm -f sem.c
cd $RUNDIR/..
for i in `jot 5`; do
/tmp/sem&
done
for i in `jot 5`; do
wait
done
rm -f /tmp/sem
exit
EOF
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <signal.h>
#include <sys/wait.h>
#include <sched.h>
#include <errno.h>
#include <err.h>
int semid = -1;
key_t semkey;
struct sembuf sop[2];
size_t pgsize;
pid_t pid;
void
random_work(void)
{
int i, n;
n = (arc4random() % 5000) + 200;
for (i = 0; i < n; i++)
(void) getpid();
}
int
main()
{
int i, j, seed, status;
seed = getpid();
semkey = ftok("/", seed);
for (i = 0; i < 5000; i++) {
pid = fork();
if (pid == -1) {
perror("fork");
exit(2);
}
if (pid == 0) { /* child */
j = 0;
/* get sem */
do {
sched_yield();
semid = semget(semkey, 0, 0);
} while (semid == -1 && j++ < 10000);
if (semid == -1)
exit(1);
/*
* Attempt to acquire the semaphore.
*/
sop[0].sem_num = 0;
sop[0].sem_op = -1;
sop[0].sem_flg = SEM_UNDO;
semop(semid, sop, 1);
random_work();
_exit(0);
} else { /* parent */
/* create sem */
if ((semid = semget(semkey, 1, IPC_CREAT | 010640)) == -1)
err(1, "semget (%s:%d)", __FILE__, __LINE__);
usleep(2000);
sop[0].sem_num = 0;
sop[0].sem_op = 1;
sop[0].sem_flg = 0;
if (semop(semid, sop, 1) == -1)
warn("init: semop (%s:%d)", __FILE__, __LINE__);
random_work();
if (semctl(semid, 0, IPC_RMID, 0) == -1 && errno != EINVAL)
warn("shmctl IPC_RMID (%s:%d)", __FILE__, __LINE__);
}
waitpid(pid, &status, 0);
}
return (0);
}
