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# "panic: vm_pageout_flush: partially invalid page xx index 0/1" seen. 30# Fixed in r255566. 31 32. ../default.cfg 33 34dir=/tmp 35odir=`pwd` 36cd $dir 37sed '1,/^EOF/d' < $odir/$0 > $dir/msync2.c 38mycc -o msync2 -Wall -Wextra msync2.c || exit 1 39rm -f msync2.c 40cd $odir 41 42dd if=/dev/zero bs=$((4096 + 1)) of=/tmp/msync2.inputfile count=1 \ 43 status=none 44/tmp/msync2 /tmp/msync2.inputfile 45rm -f /tmp/msync2 /tmp/msync2.inputfile 46exit 47 48EOF 49#include <sys/param.h> 50#include <sys/fcntl.h> 51#include <sys/mman.h> 52#include <sys/stat.h> 53#include <sys/wait.h> 54 55#include <err.h> 56#include <errno.h> 57#include <stdlib.h> 58#include <time.h> 59#include <unistd.h> 60 61#define RUNTIME 400 62 63const char *file; 64char c; 65 66void 67wr(void) 68{ 69 struct stat st; 70 char *p1; 71 size_t len; 72 int error, fd; 73 74 if ((fd = open(file, O_RDWR)) == -1) 75 err(1, "open %s", file); 76 if ((error = fstat(fd, &st)) == -1) 77 err(1, "stat(%s)", file); 78 len = round_page(st.st_size); 79 if ((p1 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 80 MAP_FAILED) 81 err(1, "mmap"); 82// p1[len - 1] = 1; /* No panic with this */ 83 p1[arc4random() % len] = 1; /* Need this for the panic */ 84 85 if ((error = msync(p1, len, MS_SYNC | MS_INVALIDATE)) == -1) 86 if (errno != EBUSY) 87 err(1, "msync"); 88 89 if (munmap(p1, len) == -1) 90 err(1, "unmap()"); 91 close(fd); 92 93 _exit(0); 94} 95 96void 97test(void) 98{ 99#if 1 100 int i; 101 102 for (i = 0; i < 3; i++) 103 if (fork() == 0) 104 wr(); 105 for (i = 0; i < 3; i++) 106 wait(NULL); 107#else 108 wr(); /* No problem here */ 109#endif 110 111 _exit(0); 112} 113 114int 115main(int argc, char *argv[]) 116{ 117 time_t start; 118 119 if (argc != 2) 120 errx(1, "Usage: %s <file>", argv[0]); 121 file = argv[1]; 122 123 start = time(NULL); 124 while (time(NULL) - start < RUNTIME) { 125 if (fork() == 0) 126 test(); 127 wait(NULL); 128 } 129 130 return (0); 131} 132