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_page_unwire: page 0xc36cce48's wire count is zero" seen. 30# https://people.freebsd.org/~pho/stress/log/kostik820.txt 31# Fixed by r285878. 32 33# Variation of mmap25.sh: 34# Access one byte past the end of the file, which is not wrong, but 35# out of specified behaviour. 36 37. ../default.cfg 38 39dir=/tmp 40odir=`pwd` 41cd $dir 42sed '1,/^EOF/d' < $odir/$0 > $dir/mmap26.c 43mycc -o mmap26 -Wall -Wextra mmap26.c || exit 1 44rm -f mmap26.c 45cd $odir 46 47cp /tmp/mmap26 /tmp/mmap26.inputfile 48daemon sh -c '(cd ../testcases/swap; ./swap -t 1m -i 2)' > \ 49 /dev/null 2>&1 50sleep 1 51 52(cd /tmp; /tmp/mmap26 /tmp/mmap26.inputfile) 53 54while pkill -9 swap; do :; done 55rm -f /tmp/mmap26 /tmp/mmap26.inputfile /tmp/mmap26.core 56exit 0 57 58EOF 59#include <sys/fcntl.h> 60#include <sys/mman.h> 61#include <sys/param.h> 62#include <sys/stat.h> 63#include <sys/types.h> 64#include <sys/wait.h> 65 66#include <err.h> 67#include <errno.h> 68#include <stdio.h> 69#include <stdlib.h> 70#include <unistd.h> 71 72const char *file; 73volatile char c; 74 75void 76test(void) 77{ 78 struct stat st; 79 char *p; 80 size_t len; 81 int error, fd; 82 83 if ((fd = open(file, O_RDWR)) == -1) 84 err(1, "open %s", file); 85 if ((error = fstat(fd, &st)) == -1) 86 err(1, "stat(%s)", file); 87 len = round_page(st.st_size); 88 if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) 89 == MAP_FAILED) 90 err(1, "mmap"); 91 if ((error = mlock(p, len)) == -1) 92 err(1, "mlock"); 93 94 if (ftruncate(fd, (off_t)0) == -1) 95 err(1, "ftruncate 1"); 96 if (ftruncate(fd, len) == -1) 97 err(1, "ftruncate 2"); 98 99 p[len - 1] = 1; 100 101 /* one byte past EOF */ 102 if (round_page((unsigned long)&p[len]) == 103 round_page((unsigned long)&p[len - 1])) { 104 fprintf(stderr, "Expect: Segmentation fault (core dumped)\n"); 105 c = p[len]; 106 } 107 108 if (munmap(p, len) == -1) 109 err(1, "unmap()"); 110 close(fd); 111} 112 113int 114main(int argc, char *argv[]) 115{ 116 if (argc != 2) 117 errx(1, "Usage: %s <file>", argv[0]); 118 file = argv[1]; 119 120 test(); 121 122 return (0); 123} 124