svn commit: r289182 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Mon Oct 12 10:42:03 2015
New Revision: 289182
URL: https://svnweb.freebsd.org/changeset/base/289182

Log:
  Added a new regression test.
  
  Sponsored by:	EMC / Isilon storage division

Added:
  user/pho/stress2/misc/forkbomb.sh   (contents, props changed)

Added: user/pho/stress2/misc/forkbomb.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/forkbomb.sh	Mon Oct 12 10:42:03 2015	(r289182)
@@ -0,0 +1,135 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2015 EMC Corp.
+# 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.
+#
+# $FreeBSD$
+#
+
+# Fork bomb memory leak test scenario.
+# https://en.wikipedia.org/wiki/Fork_bomb
+
+# OO memory seen:
+# https://people.freebsd.org/~pho/stress/log/forkbomb.txt
+# Fixed by r289026.
+
+. ../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/forkbomb.c
+mycc -o forkbomb -Wall -Wextra -O0 -g forkbomb.c || exit 1
+rm -f forkbomb.c
+cd $odir
+
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 512m -u $mdstart || exit 1
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+
+sysctl kern.maxproc
+vmstat -z | sed -n "1p;/PROC/p;/THREAD/p"
+echo
+
+/tmp/forkbomb
+
+vmstat -z | sed -n "/PROC/p;/THREAD/p"
+
+while mount | grep "on $mntpoint " | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+done
+mdconfig -d -u $mdstart
+rm -rf /tmp/forkbomb
+exit $r
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+volatile u_int *share;
+
+#define R1 0
+#define R2 1
+
+#define MXFAIL 10000
+#define PARALLEL 200
+
+void
+test(void)
+{
+	int r;
+
+	atomic_add_int(&share[R1], 1);
+	while (share[R1] != PARALLEL)
+		;
+
+	for (;;) {
+		r = fork();
+		if (r == -1)
+			atomic_add_int(&share[R2], 1);
+		if (share[R2] > MXFAIL)
+			break;
+	}
+
+	_exit(0);
+}
+
+int
+main(void)
+{
+	size_t len;
+	int i;
+
+	len = getpagesize();
+	if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED,
+	    -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	signal(SIGCHLD, SIG_IGN);
+	for (i = 0; i < PARALLEL; i++) {
+		if (fork() == 0)
+			test();
+	}
+
+	while (share[R2] < MXFAIL)
+		usleep(10000);
+	sleep(10);
+
+	return (0);
+}