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
87
88
89
90
91
|
/*
* Copyright (c) 2016-2023 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/shm.h>
static int id = -1;
static void
cleanup(void)
{
shmctl(id, IPC_RMID, NULL);
id = -1;
}
#ifdef __alpha__
# define SHMAT "osf_shmat"
#else
# define SHMAT "shmat"
#endif
#ifndef SHM_EXEC
# define SHM_EXEC 0100000
#endif
int
main(void)
{
static const int bogus_shmid = 0xfdb97531;
static const void * const bogus_shmaddr =
(void *) (unsigned long) 0xdec0ded1dec0ded2ULL;
static const int bogus_shmflg = 0xffffface;
long rc;
id = shmget(IPC_PRIVATE, 1, 0600);
if (id < 0)
perror_msg_and_skip("shmget");
atexit(cleanup);
rc = (long) shmat(bogus_shmid, bogus_shmaddr, bogus_shmflg);
printf("%s(%d, %p, SHM_RDONLY|SHM_RND|SHM_REMAP|SHM_EXEC|%#x) = %s\n",
SHMAT, bogus_shmid, bogus_shmaddr, bogus_shmflg & ~0xf000,
sprintrc(rc));
shmat(id, NULL, SHM_REMAP);
printf("%s(%d, NULL, SHM_REMAP) = %s\n", SHMAT, id, sprintrc(-1));
void *shmaddr = shmat(id, NULL, SHM_RDONLY);
if (shmaddr == (void *)(-1))
perror_msg_and_skip("shmat SHM_RDONLY");
printf("%s(%d, NULL, SHM_RDONLY) = %p\n", SHMAT, id, shmaddr);
rc = shmdt(NULL);
printf("shmdt(NULL) = %s\n", sprintrc(rc));
rc = shmdt(shmaddr);
printf("shmdt(%p) = %s\n", shmaddr, sprintrc(rc));
++shmaddr;
void *shmaddr2 = shmat(id, shmaddr, SHM_RND);
if (shmaddr2 == (void *)(-1))
printf("%s(%d, %p, SHM_RND) = %s\n",
SHMAT, id, shmaddr, sprintrc(-1));
else {
printf("%s(%d, %p, SHM_RND) = %p\n",
SHMAT, id, shmaddr, shmaddr2);
rc = shmdt(shmaddr2);
printf("shmdt(%p) = %s\n", shmaddr2, sprintrc(rc));
}
shmaddr = shmat(id, NULL, SHM_RDONLY|SHM_EXEC);
if (shmaddr == (void *)(-1))
printf("%s(%d, NULL, SHM_RDONLY|SHM_EXEC) = %s\n",
SHMAT, id, sprintrc(-1));
else {
printf("%s(%d, NULL, SHM_RDONLY|SHM_EXEC) = %p\n",
SHMAT, id, shmaddr);
rc = shmdt(shmaddr);
printf("shmdt(%p) = %s\n", shmaddr, sprintrc(rc));
}
puts("+++ exited with 0 +++");
return 0;
}
|
