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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* Basic tests for getitimer and setitimer.
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/time.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xsignal.h>
#include <unistd.h>
#include <time.h>
static sig_atomic_t cnt;
static void
alrm_handler (int sig)
{
if (++cnt > 3)
cnt = 3;
}
static void
intr_sleep (int sec)
{
struct timespec ts = { .tv_sec = sec, .tv_nsec = 0 };
while (nanosleep (&ts, &ts) == -1 && errno == EINTR)
;
}
static int
do_test (void)
{
struct itimerval it, it_old;
const int timers[] = { ITIMER_REAL, ITIMER_VIRTUAL, ITIMER_PROF };
for (int i = 0; i < array_length (timers); i++)
{
TEST_COMPARE (getitimer (timers[i], &it), 0);
/* No timer set, all value should be 0. */
TEST_COMPARE (it.it_interval.tv_sec, 0);
TEST_COMPARE (it.it_interval.tv_usec, 0);
TEST_COMPARE (it.it_value.tv_sec, 0);
TEST_COMPARE (it.it_value.tv_usec, 0);
it.it_interval.tv_sec = 10;
it.it_interval.tv_usec = 20;
TEST_COMPARE (setitimer (timers[i], &it, NULL), 0);
TEST_COMPARE (setitimer (timers[i], &(struct itimerval) { 0 }, &it_old),
0);
/* ITIMER_REAL returns { 0, 0 } for single-shot timers, while
other timers returns setitimer value. */
if (timers[i] == ITIMER_REAL)
{
TEST_COMPARE (it_old.it_interval.tv_sec, 0);
TEST_COMPARE (it_old.it_interval.tv_usec, 0);
}
else
{
TEST_COMPARE (it_old.it_interval.tv_sec, 10);
TEST_COMPARE (it_old.it_interval.tv_usec, 20);
}
/* Create a periodic timer and check if the return value is the one
previously set. */
it.it_interval.tv_sec = 10;
it.it_interval.tv_usec = 20;
it.it_value.tv_sec = 30;
it.it_value.tv_usec = 40;
TEST_COMPARE (setitimer (timers[i], &it, NULL), 0);
TEST_COMPARE (setitimer (timers[i], &(struct itimerval) { 0 }, &it_old),
0);
TEST_COMPARE (it.it_interval.tv_sec, it_old.it_interval.tv_sec);
TEST_COMPARE (it.it_interval.tv_usec, it_old.it_interval.tv_usec);
if (sizeof (time_t) == 4)
continue;
/* Same as before, but with a 64 bit time_t value. */
it.it_interval.tv_sec = (time_t) 0x1ffffffffull;
it.it_interval.tv_usec = 20;
it.it_value.tv_sec = 0;
it.it_value.tv_usec = 0;
/* Linux does not provide 64 bit time_t support for getitimer and
setitimer on architectures with 32 bit time_t support. */
if (support_itimer_support_time64())
{
TEST_COMPARE (setitimer (timers[i], &it, NULL), 0);
TEST_COMPARE (setitimer (timers[i], &(struct itimerval) { 0 },
&it_old),
0);
/* ITIMER_REAL returns { 0, 0 } for single-sort timers, while other
timers returns setitimer value. */
if (timers[i] == ITIMER_REAL)
{
TEST_COMPARE (it_old.it_interval.tv_sec, 0ull);
TEST_COMPARE (it_old.it_interval.tv_usec, 0);
}
else
{
TEST_COMPARE (it_old.it_interval.tv_sec, 0x1ffffffffull);
TEST_COMPARE (it_old.it_interval.tv_usec, 20);
}
}
else
{
TEST_COMPARE (setitimer (timers[i], &it, NULL), -1);
TEST_COMPARE (errno, EOVERFLOW);
}
/* Create a periodic timer and check if the return value is the one
previously set. */
it.it_interval.tv_sec = (time_t) 0x1ffffffffull;
it.it_interval.tv_usec = 20;
it.it_value.tv_sec = 30;
it.it_value.tv_usec = 40;
if (support_itimer_support_time64())
{
TEST_COMPARE (setitimer (timers[i], &it, NULL), 0);
TEST_COMPARE (setitimer (timers[i], &(struct itimerval) { 0 },
&it_old),
0);
TEST_COMPARE (it.it_interval.tv_sec, it_old.it_interval.tv_sec);
TEST_COMPARE (it.it_interval.tv_usec, it_old.it_interval.tv_usec);
}
else
{
TEST_COMPARE (setitimer (timers[i], &it, NULL), -1);
TEST_COMPARE (errno, EOVERFLOW);
}
}
{
struct sigaction sa = { .sa_handler = alrm_handler, .sa_flags = 0 };
sigemptyset (&sa.sa_mask);
xsigaction (SIGALRM, &sa, NULL);
}
/* Setup a timer to 0.1s and sleep for 1s and check to 3 signal handler
execution. */
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 100000;
it.it_value.tv_sec = 0;
it.it_value.tv_usec = 100000;
/* Check ITIMER_VIRTUAL and ITIMER_PROF would require to generate load
and be subject to system load. */
cnt = 0;
TEST_COMPARE (setitimer (ITIMER_REAL, &it, NULL), 0);
intr_sleep (1);
TEST_COMPARE (cnt, 3);
TEST_COMPARE (setitimer (ITIMER_REAL, &(struct itimerval) { 0 }, NULL), 0);
return 0;
}
#include <support/test-driver.c>
|
