blob: 688cfd81b5319f482328a015810a93d1a6707c45 (
plain)
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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/* Time bounds setting test
* by: john stultz (johnstul@us.ibm.com)
* (C) Copyright IBM 2012
* Licensed under the GPLv2
*
* NOTE: This is a meta-test which sets the time to edge cases then
* uses other tests to detect problems. Thus this test requires that
* the inconsistency-check and nanosleep tests be present in the same
* directory it is run from.
*
* To build:
* $ gcc set-2038.c -o set-2038 -lrt
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include "../kselftest.h"
#define NSEC_PER_SEC 1000000000LL
#define KTIME_MAX ((long long)~((unsigned long long)1 << 63))
#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
#define YEAR_1901 (-0x7fffffffL)
#define YEAR_1970 1
#define YEAR_2038 0x7fffffffL /*overflows 32bit time_t */
#define YEAR_2262 KTIME_SEC_MAX /*overflows 64bit ktime_t */
#define YEAR_MAX ((long long)((1ULL<<63)-1)) /*overflows 64bit time_t */
int is32bits(void)
{
return (sizeof(long) == 4);
}
int settime(long long time)
{
struct timeval now;
int ret;
now.tv_sec = (time_t)time;
now.tv_usec = 0;
ret = settimeofday(&now, NULL);
printf("Setting time to 0x%lx: %d\n", (long)time, ret);
return ret;
}
int do_tests(void)
{
int ret;
ret = system("date");
ret = system("./inconsistency-check -c 0 -t 20");
ret |= system("./nanosleep");
ret |= system("./nsleep-lat");
return ret;
}
int main(int argc, char *argv[])
{
int ret = 0;
int opt, dangerous = 0;
time_t start;
/* Process arguments */
while ((opt = getopt(argc, argv, "d")) != -1) {
switch (opt) {
case 'd':
dangerous = 1;
}
}
start = time(0);
/* First test that crazy values don't work */
if (!settime(YEAR_1901)) {
ret = -1;
goto out;
}
if (!settime(YEAR_MAX)) {
ret = -1;
goto out;
}
if (!is32bits() && !settime(YEAR_2262)) {
ret = -1;
goto out;
}
/* Now test behavior near edges */
settime(YEAR_1970);
ret = do_tests();
if (ret)
goto out;
settime(YEAR_2038 - 600);
ret = do_tests();
if (ret)
goto out;
/* The rest of the tests can blowup on 32bit systems */
if (is32bits() && !dangerous)
goto out;
/* Test rollover behavior 32bit edge */
settime(YEAR_2038 - 10);
ret = do_tests();
if (ret)
goto out;
settime(YEAR_2262 - 600);
ret = do_tests();
out:
/* restore clock */
settime(start);
if (ret)
return ksft_exit_fail();
return ksft_exit_pass();
}
|
