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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* Basic tests for Linux epoll_* wrappers.
Copyright (C) 2022-2023 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 <errno.h>
#include <intprops.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xsignal.h>
#include <support/xunistd.h>
#include <support/xtime.h>
#include <stdlib.h>
#include <sys/epoll.h>
/* The test focus on checking if the timeout argument is correctly handled
by glibc wrappers. */
static void
handler (int sig)
{
}
typedef int (*epoll_wait_check_t) (int, struct epoll_event *, int,
int, const sigset_t *);
static void
test_epoll_basic (epoll_wait_check_t epoll_wait_check)
{
{
sigset_t ss_usr1;
sigemptyset (&ss_usr1);
sigaddset (&ss_usr1, SIGUSR1);
TEST_COMPARE (sigprocmask (SIG_BLOCK, &ss_usr1, NULL), 0);
}
int fds[2][2];
xpipe (fds[0]);
xpipe (fds[1]);
sigset_t ss;
TEST_COMPARE (sigprocmask (SIG_SETMASK, NULL, &ss), 0);
sigdelset (&ss, SIGUSR1);
int efd = epoll_create1 (0);
TEST_VERIFY_EXIT (efd != -1);
struct epoll_event event;
event.data.fd = fds[1][0];
event.events = EPOLLIN | EPOLLET;
TEST_COMPARE (epoll_ctl (efd, EPOLL_CTL_ADD, fds[1][0], &event), 0);
pid_t parent = getpid ();
pid_t p = xfork ();
if (p == 0)
{
xclose (fds[0][1]);
xclose (fds[1][0]);
event.data.fd = fds[0][0];
event.events = EPOLLIN | EPOLLET;
TEST_COMPARE (epoll_ctl (efd, EPOLL_CTL_ADD, fds[0][0], &event), 0);
int e;
do
{
if (getppid () != parent)
FAIL_EXIT1 ("getppid()=%d != parent=%d", getppid(), parent);
errno = 0;
e = epoll_wait_check (efd, &event, 1, 500, &ss);
}
while (e == 0);
TEST_COMPARE (e, -1);
TEST_COMPARE (errno, EINTR);
TEMP_FAILURE_RETRY (write (fds[1][1], "foo", 3));
exit (0);
}
xclose (fds[0][0]);
xclose (fds[1][1]);
/* Wait some time so child is blocked on the syscall. */
nanosleep (&(struct timespec) {0, 10000000}, NULL);
TEST_COMPARE (kill (p, SIGUSR1), 0);
int e = epoll_wait_check (efd, &event, 1, 500000000, &ss);
TEST_COMPARE (e, 1);
TEST_VERIFY (event.events & EPOLLIN);
xclose (fds[0][1]);
xclose (fds[1][0]);
xclose (efd);
}
static void
test_epoll_large_timeout (epoll_wait_check_t epoll_wait_check)
{
timer_t t = support_create_timer (0, 100000000, true, NULL);
int fds[2];
xpipe (fds);
fd_set rfds;
FD_ZERO (&rfds);
FD_SET (fds[0], &rfds);
sigset_t ss;
TEST_COMPARE (sigprocmask (SIG_SETMASK, NULL, &ss), 0);
sigdelset (&ss, SIGALRM);
int efd = epoll_create1 (0);
TEST_VERIFY_EXIT (efd != -1);
struct epoll_event event;
event.data.fd = fds[0];
event.events = EPOLLIN | EPOLLET;
TEST_COMPARE (epoll_ctl (efd, EPOLL_CTL_ADD, fds[0], &event), 0);
int tmo = TYPE_MAXIMUM (int);
TEST_COMPARE (epoll_wait_check (efd, &event, 1, tmo, &ss), -1);
TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
TEST_COMPARE (epoll_wait_check (efd, &event, 1, -1, &ss), -1);
TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
support_delete_timer (t);
xclose (fds[0]);
xclose (fds[1]);
xclose (efd);
}
static int
epoll_wait_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
const sigset_t *ss)
{
sigset_t orig;
TEST_COMPARE (sigprocmask (SIG_SETMASK, ss, &orig), 0);
int r = epoll_wait (epfd, ev, maxev, tmo);
TEST_COMPARE (sigprocmask (SIG_SETMASK, &orig, NULL), 0);
return r;
}
static int
epoll_pwait_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
const sigset_t *ss)
{
return epoll_pwait (epfd, ev, maxev, tmo, ss);
}
static int
epoll_pwait2_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
const sigset_t *ss)
{
time_t s = tmo == -1 ? TYPE_MAXIMUM (time_t) : tmo / 1000;
long int ns = tmo == -1 ? 0 : (tmo % 1000) * 1000000;
return epoll_pwait2 (epfd, ev, maxev, &(struct timespec) { s, ns }, ss);
}
static int
do_test (void)
{
{
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
xsigaction (SIGUSR1, &sa, NULL);
sa.sa_handler = SIG_IGN;
xsigaction (SIGCHLD, &sa, NULL);
}
int r = epoll_pwait2 (-1, NULL, 0, NULL, NULL);
TEST_COMPARE (r, -1);
bool pwait2_supported = errno != ENOSYS;
test_epoll_basic (epoll_wait_check);
test_epoll_basic (epoll_pwait_check);
if (pwait2_supported)
test_epoll_basic (epoll_pwait2_check);
test_epoll_large_timeout (epoll_wait_check);
test_epoll_large_timeout (epoll_pwait_check);
if (pwait2_supported)
test_epoll_large_timeout (epoll_pwait2_check);
return 0;
}
#include <support/test-driver.c>
|
