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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.
#
# 'WARNING: A device driver has set "memattr" inconsistently.' seen on
# console.
# https://people.freebsd.org/~pho/stress/log/mmap27.txt
# Fixed by r298891.
. ../default.cfg
odir=`pwd`
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > mmap27.c
mycc -o mmap27 -Wall -Wextra -g -O0 mmap27.c || exit 1
rm -f mmap27.c
cd $odir
daemon sh -c '(cd ../testcases/swap; ./swap -t 2m -i 20 -l 100)' > /dev/null 2>&1
sleep 2
/tmp/mmap27
while pgrep -q swap; do
pkill -9 swap
done
rm -f ./mmap27 /tmp/mmap27.0* /tmp/mmap27
exit 0
EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
int fd;
#define ADRSPACE (256 * 1024 * 1024 )
#define PARALLEL 64
#define RUNTIME 120
#define STARTADDR 0x50000000U
static void
work(void)
{
size_t left, len;
int i;
char *p;
volatile char val;
if ((fd = open("/dev/mem", O_RDWR)) == -1)
err(1,"open()");
p = (void *)STARTADDR + trunc_page(arc4random() % ADRSPACE);
left = ADRSPACE - (size_t)p + STARTADDR;
len = trunc_page(arc4random() % left) + PAGE_SIZE;
if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
MAP_FAILED) {
if (errno == ENOMEM)
return;
err(1, "mmap()");
}
for (i = 0; i < 100; i++)
val = p[arc4random() % len];
if (munmap(p, len) == -1)
err(1, "munmap(%p)", p);
_exit(0);
}
int
main(void)
{
pid_t pids[PARALLEL];
time_t start;
int i, n;
start = time(NULL);
while (time(NULL) - start < RUNTIME) {
n = arc4random() % PARALLEL + 1;
for (i = 0; i < n; i++) {
if ((pids[i] = fork()) == 0)
work();
}
for (i = 0; i < n; i++)
if (waitpid(pids[i], NULL, 0) != pids[i])
err(1, "waitpid(%d)", pids[i]);
}
close(fd);
return (0);
}
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