87 lines
2.5 KiB
Bash
87 lines
2.5 KiB
Bash
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#!/bin/sh
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#
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# Copyright (c) 2014 EMC Corp.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Test scenario by kib@
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > mmap17.c
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mycc -o mmap17 -Wall -Wextra -O2 -g mmap17.c -lpthread || exit 1
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rm -f mmap17.c /tmp/mmap17.core
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rm -f /tmp/mmap17.core
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{ /tmp/mmap17 > /dev/null; } 2>&1 | grep -v worked
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rm -f /tmp/mmap17 /tmp/mmap17.core
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exit 0
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EOF
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/* $Id: map_excl.c,v 1.2 2014/06/16 06:02:52 kostik Exp kostik $ */
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#include <sys/mman.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef MAP_EXCL
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#define MAP_EXCL 0x00004000 /* for MAP_FIXED, fail if address is used */
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#endif
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int
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main(void)
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{
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char *addr, *addr1;
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int pagesz;
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char cmd[128];
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pagesz = getpagesize();
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addr = mmap(NULL, pagesz, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
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if (addr == (char *)MAP_FAILED)
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err(1, "mmap 1");
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printf("addr %p\n", addr);
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addr -= pagesz;
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addr1 = mmap(addr, 3 * pagesz, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_FIXED | MAP_EXCL, -1, 0);
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if (addr1 == MAP_FAILED)
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warn("EXCL worked");
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else
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fprintf(stderr, "EXCL failed\n");
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addr1 = mmap(addr, 3 * pagesz, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_FIXED, -1, 0);
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printf("addr1 %p\n", addr);
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snprintf(cmd, sizeof(cmd), "procstat -v %d", getpid());
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system(cmd);
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return (0);
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}
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