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#!/bin/sh
#
# Copyright (c) 2016 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.
#
# Stress vm object collapse.
# "panic: backing_object 0xfffff800a018f420 was somehow re-referenced during
# collapse!" seen with uma_zalloc_arg fail point enabled.
. ../default.cfg
dir=/tmp
odir=`pwd`
cd $dir
sed '1,/^EOF/d' < $odir/$0 > $dir/pipe.c
mycc -o pipe -Wall -Wextra -O0 -g pipe.c || exit 1
rm -f pipe.c
cd $odir
daemon sh -c '(cd ../testcases/swap; ./swap -t 10m -i 20)' > /dev/null 2>&1
sleep 1
e=0
export e
start=`date '+%s'`
while [ $((`date '+%s'` - start)) -lt 300 ]; do
for i in `jot $(sysctl -n hw.ncpu)`; do
/tmp/pipe &
pids="$pids $!"
done
for i in $pids; do
wait $i
[ $? -ne 0 ] && e=$((e + 1))
done
pids=""
[ $e -ne 0 ] && break
done
while pgrep -q swap; do
pkill -9 swap
done
rm -rf /tmp/pipe pipe.core
exit $e
EOF
#include <sys/wait.h>
#include <err.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#define PIPES 64
#define RUNTIME 300
int
test(void)
{
int c, e, status;
int fds[PIPES][2];
int i;
for (i = 0; i < PIPES; i++) {
if (pipe(fds[i]) == -1)
err(1, "pipe");
}
c = e = 0;
if (write(fds[0][1], &c, sizeof(c)) != sizeof(c))
err(1, "pipe write");
for (i = 0; i < PIPES; i++) {
if (fork() == 0) {
close(fds[i][1]);
if (read(fds[i][0], &c, sizeof(c)) != sizeof(c))
err(1, "pipe read");
#if defined(DEBUG)
fprintf(stderr, "pid %d: i = %d: read %d\n", getpid(),
i, c);
#endif
c++;
if (i != PIPES - 1)
if (write(fds[i + 1][1], &c, sizeof(c)) !=
sizeof(c))
err(1, "pipe write");
_exit(0);
}
close(fds[i][0]);
close(fds[i][1]);
}
for (i = 0; i < PIPES; i++) {
wait(&status);
e += status == 0 ? 0 : 1;
}
return (e);
}
int
main(void)
{
time_t start;
int e;
e = 0;
start = time(NULL);
while (time(NULL) - start < RUNTIME && e == 0)
e = test();
return (e);
}
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