1#!/bin/sh 2 3# 4# Copyright (c) 2013 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# Test scenario inspired by alc@ 30# "panic: vm_page_dirty: page is invalid!" seen. 31# Fixed in r255396. 32 33. ../default.cfg 34 35dir=/tmp 36odir=`pwd` 37cd $dir 38sed '1,/^EOF/d' < $odir/$0 > $dir/mmap5.c 39mycc -o mmap5 -Wall -Wextra mmap5.c || exit 1 40rm -f mmap5.c 41cd $odir 42 43cp /tmp/mmap5 /tmp/mmap5.inputfile 44(cd ../testcases/swap; ./swap -t 1m -i 2) & 45cp /tmp/mmap5 /tmp/mmap5.inputfile 46/tmp/mmap5 /tmp/mmap5.inputfile 47while killall -9 swap; do 48 sleep .1 49done > /dev/null 2>&1 50wait 51rm -f /tmp/mmap5 /tmp/mmap5.inputfile 52exit 53 54EOF 55#include <err.h> 56#include <errno.h> 57#include <stdlib.h> 58#include <sys/fcntl.h> 59#include <sys/mman.h> 60#include <sys/param.h> 61#include <sys/stat.h> 62#include <sys/types.h> 63#include <sys/wait.h> 64#include <unistd.h> 65 66const char *file; 67 68void 69test2(void) 70{ 71 struct stat st; 72 char *p; 73 size_t len; 74 int error, fd; 75 76 if ((fd = open(file, O_RDWR)) == -1) 77 err(1, "open %s", file); 78 if ((error = fstat(fd, &st)) == -1) 79 err(1, "stat(%s)", file); 80 len = round_page(st.st_size); 81 if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) 82 err(1, "mmap"); 83 p[arc4random() % len] = 1; 84 if (arc4random() % 100 < 50) 85 if ((error = mlock(p, len)) == -1) 86 err(1, "mlock"); 87 p[arc4random() % len] = 1; 88 if (arc4random() % 100 < 50) 89 if ((error = msync(p, len, MS_SYNC | MS_INVALIDATE)) == -1) 90 if (errno != EBUSY) 91 err(1, "msync"); 92 if (munmap(p, len) == -1) 93 err(1, "unmap()"); 94 close(fd); 95 _exit(0); 96 97} 98 99void 100test(void) 101{ 102 int i; 103 104 for (i = 0; i < 3; i++) 105 if (fork() == 0) 106 test2(); 107 for (i = 0; i < 3; i++) 108 wait(NULL); 109 110 _exit(0); 111} 112 113int 114main(int argc, char *argv[]) 115{ 116 int i; 117 118 if (argc != 2) 119 errx(1, "Usage: %s <file>", argv[0]); 120 file = argv[1]; 121 122 for (i = 0; i < 30000; i++) { 123 if (fork() == 0) 124 test(); 125 wait(NULL); 126 } 127 128 return (0); 129} 130