svn commit: r349553 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Sun Jun 30 06:44:37 UTC 2019
Author: pho
Date: Sun Jun 30 06:44:35 2019
New Revision: 349553
URL: https://svnweb.freebsd.org/changeset/base/349553
Log:
Added a regression test.
Sponsored by: Dell EMC Isilon
Added:
user/pho/stress2/misc/mkfifo8.sh
Added: user/pho/stress2/misc/mkfifo8.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/mkfifo8.sh Sun Jun 30 06:44:35 2019 (r349553)
@@ -0,0 +1,202 @@
+#!/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.
+#
+# $FreeBSD$
+#
+
+# Regression test for https://reviews.freebsd.org/D20784
+# "Fix mutual exclusion in pipe_direct_write()"
+# https://people.freebsd.org/~pho/stress/log/mkfifo8.txt
+
+# Reported by syzbot+21811cc0a89b2a87a9e7 at syzkaller.appspotmail.com
+# Test scenario suggestion by markj@
+# Fixed by r349546
+
+. ../default.cfg
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/mkfifo8.c
+mycc -o mkfifo8 -Wall -Wextra -O0 -g mkfifo8.c || exit 1
+rm -f mkfifo8.c
+cd $odir
+
+set -e
+mount | grep -q "on $mntpoint " && umount -f $mntpoint
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 1g -u $mdstart
+newfs $newfs_flags /dev/md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+set +e
+
+cd $mntpoint
+$dir/mkfifo8; s=$?
+cd $odir
+
+while mount | grep -q "on $mntpoint "; do
+ umount $mntpoint || sleep 1
+done
+mdconfig -d -u $mdstart
+rm -rf /tmp/mkfifo8
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define ACT 1
+#define NPROCS 64
+#define PARALLEL 4
+#define RUNTIME 60
+#define SIZ 8192
+#define SYNC 0
+
+static volatile u_int *share;
+static int fd;
+static char cp[SIZ];
+
+static void
+tw(void)
+{
+ int r;
+
+ atomic_add_int(&share[ACT], 1);
+ r = write(fd, cp, SIZ);
+ if (r == -1)
+ warn("write");
+
+ _exit(0);
+}
+
+static void
+tr(void)
+{
+ int i, r;
+ char cp[SIZ];
+
+ while (share[ACT] < NPROCS / 2)
+ usleep(10);
+ for (i = 0; i < NPROCS; i++) {
+ r = read(fd, cp, SIZ);
+ if (r == -1)
+ warn("read");
+ }
+
+ _exit(0);
+}
+
+static void
+test(void)
+{
+ pid_t pid[NPROCS + 1];
+ int i;
+ char file[80];
+
+ atomic_add_int(&share[SYNC], 1);
+ while (share[SYNC] != PARALLEL)
+ ;
+
+ snprintf(file, sizeof(file), "fifo.%d", getpid());
+ if (mkfifo(file, DEFFILEMODE) == -1)
+ err(1, "mkfifo(%s)", file);
+ if ((fd = open(file, O_RDWR)) == -1)
+ err(1, "open(%s)", file);
+
+ for (i = 0; i < NPROCS; i++) {
+ if ((pid[i] = fork()) == 0)
+ tw();
+ }
+ if ((pid[NPROCS] = fork()) == 0)
+ tr();
+
+ for (i = 0; i < NPROCS + 1; i++) {
+ if (waitpid(pid[i], NULL, 0) != pid[i])
+ err(1, "waitpid");
+ }
+ close(fd);
+ unlink(file);
+
+ _exit(0);
+}
+
+int
+main(void)
+{
+ pid_t pids[PARALLEL];
+ size_t len;
+ time_t start;
+ int e, i, status;
+
+ e = 0;
+ len = PAGE_SIZE;
+ if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+ err(1, "mmap");
+
+ for (i = 0; i < SIZ; i += PAGE_SIZE)
+ cp[i] = 1;
+ start = time(NULL);
+ while ((time(NULL) - start) < RUNTIME && e == 0) {
+ share[SYNC] = 0;
+ share[ACT] = 0;
+ for (i = 0; i < PARALLEL; i++) {
+ if ((pids[i] = fork()) == 0)
+ test();
+ if (pids[i] == -1)
+ err(1, "fork()");
+ }
+ for (i = 0; i < PARALLEL; i++) {
+ if (waitpid(pids[i], &status, 0) == -1)
+ err(1, "waitpid(%d)", pids[i]);
+ if (status != 0) {
+ if (WIFSIGNALED(status))
+ fprintf(stderr,
+ "pid %d exit signal %d\n",
+ pids[i], WTERMSIG(status));
+ }
+ e += status == 0 ? 0 : 1;
+ }
+ }
+
+ return (e);
+}
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