Date: Mon, 12 Oct 2015 10:42:03 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r289182 - user/pho/stress2/misc Message-ID: <201510121042.t9CAg38p053631@repo.freebsd.org>
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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); +}
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