pthread_test.cpp revision 6260553d48f6fd87ca220270bea8bafdde5726ec 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <gtest/gtest.h>
18
19#include <errno.h>
20#include <pthread.h>
21#include <unistd.h>
22
23TEST(pthread, pthread_key_create) {
24  pthread_key_t key;
25  ASSERT_EQ(0, pthread_key_create(&key, NULL));
26  ASSERT_EQ(0, pthread_key_delete(key));
27  // Can't delete a key that's already been deleted.
28  ASSERT_EQ(EINVAL, pthread_key_delete(key));
29}
30
31static void* IdFn(void* arg) {
32  return arg;
33}
34
35static void* SleepFn(void* arg) {
36  sleep(reinterpret_cast<unsigned int>(arg));
37  return NULL;
38}
39
40static void* SpinFn(void* arg) {
41  volatile bool* b = reinterpret_cast<volatile bool*>(arg);
42  while (!*b) {
43  }
44  return NULL;
45}
46
47static void* JoinFn(void* arg) {
48  return reinterpret_cast<void*>(pthread_join(reinterpret_cast<pthread_t>(arg), NULL));
49}
50
51static void AssertDetached(pthread_t t, bool is_detached) {
52  pthread_attr_t attr;
53  ASSERT_EQ(0, pthread_getattr_np(t, &attr));
54  int detach_state;
55  ASSERT_EQ(0, pthread_attr_getdetachstate(&attr, &detach_state));
56  pthread_attr_destroy(&attr);
57  ASSERT_EQ(is_detached, (detach_state == PTHREAD_CREATE_DETACHED));
58}
59
60TEST(pthread, pthread_create) {
61  void* expected_result = reinterpret_cast<void*>(123);
62  // Can we create a thread?
63  pthread_t t;
64  ASSERT_EQ(0, pthread_create(&t, NULL, IdFn, expected_result));
65  // If we join, do we get the expected value back?
66  void* result;
67  ASSERT_EQ(0, pthread_join(t, &result));
68  ASSERT_EQ(expected_result, result);
69}
70
71TEST(pthread, pthread_no_join_after_detach) {
72  pthread_t t1;
73  ASSERT_EQ(0, pthread_create(&t1, NULL, SleepFn, reinterpret_cast<void*>(5)));
74
75  // After a pthread_detach...
76  ASSERT_EQ(0, pthread_detach(t1));
77  AssertDetached(t1, true);
78
79  // ...pthread_join should fail.
80  void* result;
81  ASSERT_EQ(EINVAL, pthread_join(t1, &result));
82}
83
84TEST(pthread, pthread_no_op_detach_after_join) {
85  bool done = false;
86
87  pthread_t t1;
88  ASSERT_EQ(0, pthread_create(&t1, NULL, SpinFn, &done));
89
90  // If thread 2 is already waiting to join thread 1...
91  pthread_t t2;
92  ASSERT_EQ(0, pthread_create(&t2, NULL, JoinFn, reinterpret_cast<void*>(t1)));
93
94  sleep(1); // (Give t2 a chance to call pthread_join.)
95
96  // ...a call to pthread_detach on thread 1 will "succeed" (silently fail)...
97  ASSERT_EQ(0, pthread_detach(t1));
98  AssertDetached(t1, false);
99
100  done = true;
101
102  // ...but t2's join on t1 still goes ahead (which we can tell because our join on t2 finishes).
103  void* join_result;
104  ASSERT_EQ(0, pthread_join(t2, &join_result));
105  ASSERT_EQ(0, reinterpret_cast<int>(join_result));
106}
107
108TEST(pthread, pthread_join_self) {
109  void* result;
110  ASSERT_EQ(EDEADLK, pthread_join(pthread_self(), &result));
111}
112
113#if __BIONIC__ // For some reason, gtest on bionic can cope with this but gtest on glibc can't.
114
115static void TestBug37410() {
116  pthread_t t1;
117  ASSERT_EQ(0, pthread_create(&t1, NULL, JoinFn, reinterpret_cast<void*>(pthread_self())));
118  pthread_exit(NULL);
119}
120
121// We have to say "DeathTest" here so gtest knows to run this test (which exits)
122// in its own process.
123TEST(pthread_DeathTest, pthread_bug_37410) {
124  // http://code.google.com/p/android/issues/detail?id=37410
125  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
126  EXPECT_EXIT(TestBug37410(), ::testing::ExitedWithCode(0), "");
127}
128#endif
129
130static void* SignalHandlerFn(void* arg) {
131  sigset_t wait_set;
132  sigfillset(&wait_set);
133  return reinterpret_cast<void*>(sigwait(&wait_set, reinterpret_cast<int*>(arg)));
134}
135
136TEST(pthread, pthread_sigmask) {
137  // Block SIGUSR1.
138  sigset_t set;
139  sigemptyset(&set);
140  sigaddset(&set, SIGUSR1);
141  ASSERT_EQ(0, pthread_sigmask(SIG_BLOCK, &set, NULL));
142
143  // Spawn a thread that calls sigwait and tells us what it received.
144  pthread_t signal_thread;
145  int received_signal = -1;
146  ASSERT_EQ(0, pthread_create(&signal_thread, NULL, SignalHandlerFn, &received_signal));
147
148  // Send that thread SIGUSR1.
149  pthread_kill(signal_thread, SIGUSR1);
150
151  // See what it got.
152  void* join_result;
153  ASSERT_EQ(0, pthread_join(signal_thread, &join_result));
154  ASSERT_EQ(SIGUSR1, received_signal);
155  ASSERT_EQ(0, reinterpret_cast<int>(join_result));
156}
157