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 32. ../default.cfg 33 34dir=/tmp 35odir=`pwd` 36cd $dir 37sed '1,/^EOF/d' < $odir/$0 > $dir/wire_no_page.c 38mycc -o mmap6 -Wall -Wextra wire_no_page.c || exit 1 39rm -f wire_no_page.c 40cd $odir 41 42cp /tmp/mmap6 /tmp/mmap6.inputfile 43(cd ../testcases/swap; ./swap -t 5m -i 2) & 44cp /tmp/mmap6 /tmp/mmap6.inputfile 45/tmp/mmap6 /tmp/mmap6.inputfile 46while killall -9 swap; do 47 sleep .1 48done > /dev/null 2>&1 49wait 50rm -f /tmp/mmap6 /tmp/mmap6.inputfile 51exit 0 52 53EOF 54#include <sys/param.h> 55#include <sys/fcntl.h> 56#include <sys/mman.h> 57#include <sys/stat.h> 58#include <sys/wait.h> 59 60#include <err.h> 61#include <errno.h> 62#include <stdlib.h> 63#include <time.h> 64#include <unistd.h> 65 66#define RUNTIME 300 67 68const char *file; 69char c; 70 71void 72rd(void) 73{ 74 struct stat st; 75 char *p1, *p2; 76 size_t len; 77 int error, fd; 78 79 if ((fd = open(file, O_RDONLY)) == -1) 80 err(1, "open %s", file); 81 if ((error = fstat(fd, &st)) == -1) 82 err(1, "stat(%s)", file); 83 len = round_page(st.st_size); 84 if ((p1 = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) 85 err(1, "mmap"); 86 if ((p2 = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) 87 err(1, "mmap"); 88 c = p1[arc4random() % len]; 89 c = p2[arc4random() % len]; 90 if (arc4random() % 100 < 50) 91 if ((error = mlock(p1, len)) == -1) 92 err(1, "mlock"); 93 c = p1[arc4random() % len]; 94 if (munmap(p2, len) == -1) 95 err(1, "unmap()"); 96 if (munmap(p1, len) == -1) 97 err(1, "unmap()"); 98 close(fd); 99 100} 101void 102wr(void) 103{ 104 struct stat st; 105 char *p1, *p2; 106 size_t len; 107 int error, fd; 108 109 if ((fd = open(file, O_RDWR)) == -1) 110 err(1, "open %s", file); 111 if ((error = fstat(fd, &st)) == -1) 112 err(1, "stat(%s)", file); 113 len = round_page(st.st_size); 114 if ((p1 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 115 MAP_FAILED) 116 err(1, "mmap"); 117 if ((p2 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 118 MAP_FAILED) 119 err(1, "mmap"); 120 p1[arc4random() % len] = 1; 121 p2[arc4random() % len] = 1; 122 if (arc4random() % 100 < 50) 123 if ((error = mlock(p1, len)) == -1) 124 err(1, "mlock"); 125 p1[arc4random() % len] = 1; 126 if (arc4random() % 100 < 50) 127 if ((error = msync(p1, len, MS_SYNC | MS_INVALIDATE)) == -1) 128 if (errno != EBUSY) 129 err(1, "msync"); 130 if (munmap(p2, len) == -1) 131 err(1, "unmap()"); 132 if (munmap(p1, len) == -1) 133 err(1, "unmap()"); 134 close(fd); 135 136} 137 138void 139test2(void) 140{ 141 if (arc4random() % 100 < 30) 142 rd(); 143 else 144 wr(); 145 _exit(0); 146} 147 148void 149test(void) 150{ 151 int i; 152 153 for (i = 0; i < 3; i++) 154 if (fork() == 0) 155 test2(); 156 for (i = 0; i < 3; i++) 157 wait(NULL); 158 159 _exit(0); 160} 161 162int 163main(int argc, char *argv[]) 164{ 165 time_t start; 166 167 if (argc != 2) 168 errx(1, "Usage: %s <file>", argv[0]); 169 file = argv[1]; 170 171 start = time(NULL); 172 while (time(NULL) - start < RUNTIME) { 173 if (fork() == 0) 174 test(); 175 wait(NULL); 176 } 177 178 return (0); 179} 180