1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#!/bin/sh
#
# Copyright (c) 2014 EMC Corp.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# Test scenario by kib@
. ../default.cfg
here=`pwd`
cd /tmp
sed '1,/^EOF/d' < $here/$0 > mmap17.c
mycc -o mmap17 -Wall -Wextra -O2 -g mmap17.c -lpthread || exit 1
rm -f mmap17.c /tmp/mmap17.core
rm -f /tmp/mmap17.core
{ /tmp/mmap17 > /dev/null; } 2>&1 | grep -v worked
rm -f /tmp/mmap17 /tmp/mmap17.core
exit 0
EOF
/* $Id: map_excl.c,v 1.2 2014/06/16 06:02:52 kostik Exp kostik $ */
#include <sys/mman.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#ifndef MAP_EXCL
#define MAP_EXCL 0x00004000 /* for MAP_FIXED, fail if address is used */
#endif
int
main(void)
{
char *addr, *addr1;
int pagesz;
char cmd[128];
pagesz = getpagesize();
addr = mmap(NULL, pagesz, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
if (addr == (char *)MAP_FAILED)
err(1, "mmap 1");
printf("addr %p\n", addr);
addr -= pagesz;
addr1 = mmap(addr, 3 * pagesz, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_FIXED | MAP_EXCL, -1, 0);
if (addr1 == MAP_FAILED)
warn("EXCL worked");
else
fprintf(stderr, "EXCL failed\n");
addr1 = mmap(addr, 3 * pagesz, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_FIXED, -1, 0);
printf("addr1 %p\n", addr);
snprintf(cmd, sizeof(cmd), "procstat -v %d", getpid());
system(cmd);
return (0);
}
|
