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142 lines
3.1 KiB
Bash
Executable file
142 lines
3.1 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Regression test for panic in semexit_myhook
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# Test scenario by kib@
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. ../default.cfg
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odir=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $odir/$0 > sem.c
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mycc -o sem -Wall sem.c
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rm -f sem.c
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cd $RUNDIR/..
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for i in `jot 5`; do
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/tmp/sem&
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done
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for i in `jot 5`; do
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wait
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done
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rm -f /tmp/sem
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exit
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EOF
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include <sys/shm.h>
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#include <sys/sem.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <sched.h>
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#include <errno.h>
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#include <err.h>
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int semid = -1;
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key_t semkey;
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struct sembuf sop[2];
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size_t pgsize;
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pid_t pid;
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void
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random_work(void)
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{
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int i, n;
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n = (arc4random() % 5000) + 200;
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for (i = 0; i < n; i++)
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(void) getpid();
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}
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int
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main()
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{
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int i, j, seed, status;
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seed = getpid();
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semkey = ftok("/", seed);
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for (i = 0; i < 5000; i++) {
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pid = fork();
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if (pid == -1) {
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perror("fork");
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exit(2);
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}
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if (pid == 0) { /* child */
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j = 0;
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/* get sem */
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do {
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sched_yield();
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semid = semget(semkey, 0, 0);
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} while (semid == -1 && j++ < 10000);
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if (semid == -1)
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exit(1);
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/*
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* Attempt to acquire the semaphore.
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*/
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sop[0].sem_num = 0;
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sop[0].sem_op = -1;
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sop[0].sem_flg = SEM_UNDO;
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semop(semid, sop, 1);
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random_work();
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_exit(0);
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} else { /* parent */
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/* create sem */
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if ((semid = semget(semkey, 1, IPC_CREAT | 010640)) == -1)
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err(1, "semget (%s:%d)", __FILE__, __LINE__);
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usleep(2000);
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sop[0].sem_num = 0;
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sop[0].sem_op = 1;
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sop[0].sem_flg = 0;
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if (semop(semid, sop, 1) == -1)
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warn("init: semop (%s:%d)", __FILE__, __LINE__);
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random_work();
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if (semctl(semid, 0, IPC_RMID, 0) == -1 && errno != EINVAL)
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warn("shmctl IPC_RMID (%s:%d)", __FILE__, __LINE__);
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}
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waitpid(pid, &status, 0);
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}
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return (0);
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}
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