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
/*
* Copyright 2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
/*
* hook_test_data.h -- defines some symbols/values to be used in
* hook_test.c (making syscalls) and in hook_test_preload.c (intercepting those
* same syscalls). This file defines variables with internal linkage, and
* compiler wanrs if they are not used in a TU. This is ugly usually, but
* these are really meant to be used in the two other files source files
* mentioned above.
* This header is not meant to be used anywhere else.
*/
#ifndef INTERCEPT_HOOK_TEST_DATA_H
#define INTERCEPT_HOOK_TEST_DATA_H
#include <unistd.h>
#include <stdbool.h>
/* arbitrary fd, expected not to conflict with any valid fd */
static const int hook_test_fd = 8765;
static const char dummy_data[] = "dummy_data";
static const ssize_t hook_test_dummy_return_value = 5;
static inline bool
is_spurious_syscall(long syscall_number, long arg0)
{
#ifdef EXPECT_SPURIOUS_SYSCALLS
/*
* A filter function which is aware of syscall originating
* from ASAN, gcov, etc...
*
* In regulard builds, such filtering should not be applied, and
* the hook test should look at every syscall.
* The goal of insturmented builds is not to retest the same logic as
* the test do otherwise, but rather to execute the code with the
* instrumentation in place. Therefore, it is not a problem if
* the test just allows through pretty much any syscall here.
*/
return syscall_number != SYS_write || arg0 != hook_test_fd;
#else
/* regular testing, no syscalls ignored */
(void) syscall_number;
(void) arg0;
return false;
#endif
}
#endif