1#!/bin/sh 2 3# 4# Copyright (c) 2014 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 by kib@ 30 31. ../default.cfg 32 33here=`pwd` 34cd /tmp 35sed '1,/^EOF/d' < $here/$0 > mmap17.c 36mycc -o mmap17 -Wall -Wextra -O2 -g mmap17.c -lpthread || exit 1 37rm -f mmap17.c /tmp/mmap17.core 38rm -f /tmp/mmap17.core 39 40{ /tmp/mmap17 > /dev/null; } 2>&1 | grep -v worked 41 42rm -f /tmp/mmap17 /tmp/mmap17.core 43exit 0 44EOF 45/* $Id: map_excl.c,v 1.2 2014/06/16 06:02:52 kostik Exp kostik $ */ 46 47#include <sys/mman.h> 48#include <err.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <unistd.h> 52 53#ifndef MAP_EXCL 54#define MAP_EXCL 0x00004000 /* for MAP_FIXED, fail if address is used */ 55#endif 56 57int 58main(void) 59{ 60 char *addr, *addr1; 61 int pagesz; 62 char cmd[128]; 63 64 pagesz = getpagesize(); 65 addr = mmap(NULL, pagesz, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0); 66 if (addr == (char *)MAP_FAILED) 67 err(1, "mmap 1"); 68 printf("addr %p\n", addr); 69 70 addr -= pagesz; 71 addr1 = mmap(addr, 3 * pagesz, PROT_READ | PROT_WRITE, 72 MAP_ANON | MAP_FIXED | MAP_EXCL, -1, 0); 73 if (addr1 == MAP_FAILED) 74 warn("EXCL worked"); 75 else 76 fprintf(stderr, "EXCL failed\n"); 77 78 addr1 = mmap(addr, 3 * pagesz, PROT_READ | PROT_WRITE, 79 MAP_ANON | MAP_FIXED, -1, 0); 80 printf("addr1 %p\n", addr); 81 82 snprintf(cmd, sizeof(cmd), "procstat -v %d", getpid()); 83 system(cmd); 84 85 return (0); 86} 87