1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <gtest/gtest.h>
30
31 #include <errno.h>
32 #include <sys/sem.h>
33
34 #include <android-base/file.h>
35
36 #include "utils.h"
37
TEST(sys_sem,smoke)38 TEST(sys_sem, smoke) {
39 if (semctl(-1, 0, IPC_RMID) == -1 && errno == ENOSYS) {
40 GTEST_SKIP() << "no <sys/sem.h> support in this kernel";
41 }
42
43 // Create a semaphore.
44 TemporaryDir dir;
45 key_t key = ftok(dir.path, 1);
46 int id = semget(key, 1, IPC_CREAT|0666);
47 ASSERT_NE(id, -1);
48
49 // Check semaphore info.
50 semid_ds ds = {};
51 ASSERT_EQ(0, semctl(id, 0, IPC_STAT, &ds));
52 ASSERT_EQ(1U, ds.sem_nsems);
53
54 ASSERT_EQ(0, semctl(id, 0, GETVAL));
55
56 // Increment.
57 sembuf ops[] = {{ .sem_num = 0, .sem_op = 1, .sem_flg = 0 }};
58 ASSERT_EQ(0, semop(id, ops, 1));
59 ASSERT_EQ(1, semctl(id, 0, GETVAL));
60
61 // Test timeouts.
62 timespec ts = { .tv_sec = 0, .tv_nsec = 100 };
63 ops[0] = { .sem_num = 0, .sem_op = 0, .sem_flg = 0 };
64 errno = 0;
65 ASSERT_EQ(-1, semtimedop(id, ops, 1, &ts));
66 ASSERT_ERRNO(EAGAIN);
67 ASSERT_EQ(1, semctl(id, 0, GETVAL));
68
69 // Decrement.
70 ops[0] = { .sem_num = 0, .sem_op = -1, .sem_flg = 0 };
71 ASSERT_EQ(0, semop(id, ops, 1));
72 ASSERT_EQ(0, semctl(id, 0, GETVAL));
73
74 // Destroy the semaphore.
75 ASSERT_EQ(0, semctl(id, 0, IPC_RMID));
76 }
77
TEST(sys_sem,semget_failure)78 TEST(sys_sem, semget_failure) {
79 errno = 0;
80 ASSERT_EQ(-1, semget(-1, -1, 0));
81 ASSERT_TRUE(errno == EINVAL || errno == ENOSYS);
82 }
83
TEST(sys_sem,semctl_failure)84 TEST(sys_sem, semctl_failure) {
85 errno = 0;
86 ASSERT_EQ(-1, semctl(-1, 0, IPC_RMID));
87 ASSERT_TRUE(errno == EINVAL || errno == ENOSYS);
88 }
89
TEST(sys_sem,semop_failure)90 TEST(sys_sem, semop_failure) {
91 #pragma clang diagnostic push
92 #pragma clang diagnostic ignored "-Wnonnull"
93 errno = 0;
94 ASSERT_EQ(-1, semop(-1, nullptr, 0));
95 ASSERT_TRUE(errno == EINVAL || errno == ENOSYS);
96 #pragma clang diagnostic pop
97 }
98
TEST(sys_sem,semtimedop_failure)99 TEST(sys_sem, semtimedop_failure) {
100 #pragma clang diagnostic push
101 #pragma clang diagnostic ignored "-Wnonnull"
102 errno = 0;
103 ASSERT_EQ(-1, semtimedop(-1, nullptr, 0, nullptr));
104 ASSERT_TRUE(errno == EINVAL || errno == ENOSYS);
105 #pragma clang diagnostic pop
106 }
107
TEST(sys_sem,union_semun)108 TEST(sys_sem, union_semun) {
109 // https://github.com/android-ndk/ndk/issues/400
110 #if defined(__BIONIC__)
111 semun arg;
112 semid_ds i1;
113 seminfo i2;
114 unsigned short a[] = { 1u, 2u };
115 arg.val = 123;
116 arg.buf = &i1;
117 arg.array = a;
118 arg.__buf = &i2;
119 #else
120 // glibc already mostly removed this cruft (although it's still in <linux/sem.h>).
121 #endif
122 }
123