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
|
/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <support/check.h>
#include <support/timespec.h>
#include <support/xunistd.h>
/* A bogus clock value that tells run_test to use pthread_mutex_timedlock
rather than pthread_mutex_clocklock. */
#define CLOCK_USE_TIMEDLOCK (-1)
static void
do_test_clock (clockid_t clockid)
{
const clockid_t clockid_for_get =
(clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
size_t ps = sysconf (_SC_PAGESIZE);
char tmpfname[] = "/tmp/tst-mutex9.XXXXXX";
char data[ps];
void *mem;
int fd;
pthread_mutex_t *m;
pthread_mutexattr_t a;
pid_t pid;
fd = mkstemp (tmpfname);
if (fd == -1)
FAIL_EXIT1 ("cannot open temporary file: %m\n");
/* Make sure it is always removed. */
unlink (tmpfname);
/* Create one page of data. */
memset (data, '\0', ps);
/* Write the data to the file. */
xwrite (fd, data, ps);
mem = xmmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd);
m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))
& ~(__alignof (pthread_mutex_t) - 1));
TEST_COMPARE (pthread_mutexattr_init (&a), 0);
TEST_COMPARE (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED), 0);
TEST_COMPARE (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE), 0);
#ifdef ENABLE_PI
TEST_COMPARE (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT), 0);
#endif
int e;
if ((e = pthread_mutex_init (m, &a)) != 0)
{
#ifdef ENABLE_PI
if (e == ENOTSUP)
FAIL_UNSUPPORTED ("PI mutexes unsupported");
#endif
FAIL_EXIT1 ("mutex_init failed");
}
TEST_COMPARE (pthread_mutex_lock (m), 0);
TEST_COMPARE (pthread_mutexattr_destroy (&a), 0);
puts ("going to fork now");
pid = xfork ();
if (pid == 0)
{
if (pthread_mutex_trylock (m) == 0)
FAIL_EXIT1 ("child: mutex_trylock succeeded");
if (pthread_mutex_unlock (m) == 0)
FAIL_EXIT1 ("child: mutex_unlock succeeded");
const struct timespec ts = timespec_add (xclock_now (clockid_for_get),
make_timespec (0, 500000000));
if (clockid == CLOCK_USE_TIMEDLOCK)
TEST_COMPARE (pthread_mutex_timedlock (m, &ts), ETIMEDOUT);
else
TEST_COMPARE (pthread_mutex_clocklock (m, clockid, &ts), ETIMEDOUT);
alarm (1);
pthread_mutex_lock (m);
puts ("child: mutex_lock returned");
exit (0);
}
sleep (2);
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
FAIL_EXIT1 ("waitpid failed");
if (! WIFSIGNALED (status))
FAIL_EXIT1 ("child not killed by signal");
TEST_COMPARE (WTERMSIG (status), SIGALRM);
}
static int
do_test (void)
{
do_test_clock (CLOCK_USE_TIMEDLOCK);
do_test_clock (CLOCK_REALTIME);
do_test_clock (CLOCK_MONOTONIC);
return 0;
}
#include <support/test-driver.c>
|
