1#!/bin/sh 2 3# 4# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Provokes a deadlock by lower priority process holding a lock and 30# never beeing run 31 32. ../default.cfg 33 34dir=$RUNDIR 35N=5 # Number of CPUs + 1 36M=25 # Number of lower priority jobs 37 38odir=`pwd` 39mkdir -p $dir || exit 1 40cd $dir 41sed '1,/^EOF/d' < $odir/$0 > $dir/inversion.c 42mycc -o inversion -Wall inversion.c 43rm -f inversion.c 44 45mp=`df $dir | tail -1 | awk '{print $NF}'` 46mp=`mount | grep "on $mp "` 47if echo $mp | grep -wq nfs; then 48 pgrep -q lockd || { echo "lockd not running"; exit 0; } 49fi 50 51for i in `jot $N`; do 52 ./inversion 600 & 53done 54 55while pgrep inversion > /dev/null; do 56 ( 57 for i in `jot $M`; do 58 nice -n 20 lockf -s -t 0 .lock pwd > /dev/null & 59 done 60 for i in `jot $M`; do 61 wait 62 done 63 ) 64done 65 66for i in `jot $N`; do 67 wait 68done 69rm -f inversion 70exit 71 72EOF 73#include <signal.h> 74#include <stdlib.h> 75#include <unistd.h> 76 77void 78handler(int i) 79{ 80 exit(0); 81} 82 83int 84main(int argc, char **argv) 85{ 86 87 int t; 88 if (argc == 2) 89 t = atoi(argv[1]); 90 else 91 t = 60; 92 signal(SIGALRM, handler); 93 alarm(t); 94 for (;;) 95 ; 96 return (0); 97} 98