1#!/bin/sh 2 3# 4# Copyright (c) 2015 EMC Corp. 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# "panic: vm_object_unwire: missing page" seen. 30# https://people.freebsd.org/~pho/stress/log/mmap23.txt 31# Test scenario by kib@. 32# Fixed by r285878. 33 34. ../default.cfg 35 36dir=/tmp 37odir=`pwd` 38cd $dir 39sed '1,/^EOF/d' < $odir/$0 > $dir/mmap23.c 40mycc -o mmap23 -Wall -Wextra mmap23.c || exit 1 41rm -f mmap23.c 42cd $odir 43 44cp /tmp/mmap23 /tmp/mmap23.inputfile 45daemon sh -c '(cd ../testcases/swap; ./swap -t 1m -i 2)' > \ 46 /dev/null 2>&1 47 48/tmp/mmap23 /tmp/mmap23.inputfile & 49sleep .2 50dd if=/dev/zero of=/tmp/mmap23.inputfile bs=1k count=1 status=none 51 52while pgrep -q swap; do 53 pkill -9 swap 54done 55 56rm -f /tmp/mmap23 /tmp/mmap23.inputfile 57exit 58 59EOF 60#include <sys/fcntl.h> 61#include <sys/mman.h> 62#include <sys/param.h> 63#include <sys/stat.h> 64#include <sys/types.h> 65#include <sys/wait.h> 66 67#include <err.h> 68#include <errno.h> 69#include <stdlib.h> 70#include <unistd.h> 71 72const char *file; 73 74void 75test(void) 76{ 77 struct stat st; 78 char *p; 79 size_t len; 80 int error, fd; 81 82 if ((fd = open(file, O_RDWR)) == -1) 83 err(1, "open %s", file); 84 if ((error = fstat(fd, &st)) == -1) 85 err(1, "stat(%s)", file); 86 len = round_page(st.st_size); 87 if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) 88 err(1, "mmap"); 89 p[arc4random() % len] = 1; 90 if ((error = mlock(p, len)) == -1) 91 err(1, "mlock"); 92 sleep(2); 93 if (munmap(p, len) == -1) 94 err(1, "unmap()"); 95 close(fd); 96} 97 98int 99main(int argc, char *argv[]) 100{ 101 if (argc != 2) 102 errx(1, "Usage: %s <file>", argv[0]); 103 file = argv[1]; 104 105 test(); 106 107 return (0); 108} 109