1#!/bin/sh 2 3# 4# Copyright (c) 2016 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# 'WARNING: A device driver has set "memattr" inconsistently.' seen on 30# console. 31# https://people.freebsd.org/~pho/stress/log/mmap27.txt 32# Fixed by r298891. 33 34. ../default.cfg 35 36odir=`pwd` 37cd /tmp 38sed '1,/^EOF/d' < $odir/$0 > mmap27.c 39mycc -o mmap27 -Wall -Wextra -g -O0 mmap27.c || exit 1 40rm -f mmap27.c 41cd $odir 42 43daemon sh -c '(cd ../testcases/swap; ./swap -t 2m -i 20 -l 100)' > /dev/null 2>&1 44sleep 2 45/tmp/mmap27 46while pgrep -q swap; do 47 pkill -9 swap 48done 49rm -f ./mmap27 /tmp/mmap27.0* /tmp/mmap27 50exit 0 51 52EOF 53#include <sys/param.h> 54#include <sys/mman.h> 55#include <sys/wait.h> 56 57#include <err.h> 58#include <errno.h> 59#include <fcntl.h> 60#include <stdio.h> 61#include <stdlib.h> 62#include <string.h> 63#include <time.h> 64#include <unistd.h> 65 66int fd; 67 68#define ADRSPACE (256 * 1024 * 1024 ) 69#define PARALLEL 64 70#define RUNTIME 120 71#define STARTADDR 0x50000000U 72 73static void 74work(void) 75{ 76 size_t left, len; 77 int i; 78 char *p; 79 volatile char val; 80 81 if ((fd = open("/dev/mem", O_RDWR)) == -1) 82 err(1,"open()"); 83 84 p = (void *)STARTADDR + trunc_page(arc4random() % ADRSPACE); 85 left = ADRSPACE - (size_t)p + STARTADDR; 86 len = trunc_page(arc4random() % left) + PAGE_SIZE; 87 88 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 89 MAP_FAILED) { 90 if (errno == ENOMEM) 91 return; 92 err(1, "mmap()"); 93 } 94 95 for (i = 0; i < 100; i++) 96 val = p[arc4random() % len]; 97 98 if (munmap(p, len) == -1) 99 err(1, "munmap(%p)", p); 100 101 _exit(0); 102} 103 104int 105main(void) 106{ 107 pid_t pids[PARALLEL]; 108 time_t start; 109 int i, n; 110 111 start = time(NULL); 112 while (time(NULL) - start < RUNTIME) { 113 n = arc4random() % PARALLEL + 1; 114 for (i = 0; i < n; i++) { 115 if ((pids[i] = fork()) == 0) 116 work(); 117 } 118 119 for (i = 0; i < n; i++) 120 if (waitpid(pids[i], NULL, 0) != pids[i]) 121 err(1, "waitpid(%d)", pids[i]); 122 } 123 close(fd); 124 125 return (0); 126} 127