1 files changed, 119 insertions, 0 deletions

diff --git a/tools/test/stress2/misc/truncate9.sh b/tools/test/stress2/misc/truncate9.sh
new file mode 100755
index 000000000000..1acda51aa7c8
--- /dev/null
+++ b/tools/test/stress2/misc/truncate9.sh
@@ -0,0 +1,119 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2021 Peter Holm <pho@FreeBSD.org>
+#
+# 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.
+#
+
+# Truncate test scenario. No problems seen.
+
+. ../default.cfg
+
+odir=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $odir/$0 > truncate9.c
+mycc -o truncate9 -Wall -Wextra truncate9.c || exit 1
+rm -f truncate9.c
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 2g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags -n md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+set +e
+
+(cd $odir/../testcases/swap; ./swap -t 5m -i 20 -l 100) > /dev/null &
+cd $mntpoint
+for i in `jot 5`; do
+	/tmp/truncate9 &
+	pids="$pids $!"
+done
+for i in $pids; do
+	wait $i
+done
+while pkill swap; do :; done
+wait
+cd $odir
+
+umount $mntpoint
+mdconfig -d -u $mdstart
+rm /tmp/truncate9
+exit $s
+EOF
+#include <sys/mman.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+int
+main (void)
+{
+	off_t opos, pos;
+	time_t start;
+	int fd, i;
+	char file[80], *cp;
+
+	snprintf(file, sizeof(file), "file.%d", getpid());
+	start = time(NULL);
+	if ((fd = open(file, O_RDWR | O_TRUNC | O_CREAT, 0644)) == -1)
+		err(1, "open(%s)", file);
+	close(fd);
+	while (time(NULL) - start < 120) {
+		if ((fd = open(file, O_RDWR)) == -1)
+			err(1, "open(%s)", file);
+		pos = arc4random();
+		opos = pos = (pos << 12) | arc4random();
+		if (ftruncate(fd, pos) == -1)
+			err(1, "ftruncate()");
+		if ((cp = mmap(NULL, pos, PROT_READ | PROT_WRITE,
+		    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+			err(1, "mmap");
+		cp[0] = 1;
+		cp[pos - 1] = 2;
+		for (i = 0; i < 10; i++) {
+			while (pos >= opos) {
+				pos = arc4random();
+				pos = (pos << 12) | arc4random();
+			}
+			if (ftruncate(fd, pos) == -1)
+				err(1, "ftruncate()");
+			cp[0] = 1;
+			cp[pos - 1] = 2;
+		}
+
+		if (munmap(cp, opos) == -1)
+			err(1, "munmap");
+		close(fd);
+	}
+	unlink(file);
+
+	return (0);
+}