string_test.cpp revision ad88a0863110798cef5169dcf917e18b967a7cf6 
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 <string.h>
21
22TEST(string, strerror) {
23  // Valid.
24  ASSERT_STREQ("Success", strerror(0));
25  ASSERT_STREQ("Operation not permitted", strerror(1));
26
27  // Invalid.
28  ASSERT_STREQ("Unknown error 4294967295", strerror(-1));
29  ASSERT_STREQ("Unknown error 1234", strerror(1234));
30}
31
32#if __BIONIC__ // glibc's strerror isn't thread safe, only its strsignal.
33
34static void* ConcurrentStrErrorFn(void*) {
35  bool equal = (strcmp("Unknown error 2002", strerror(2002)) == 0);
36  return reinterpret_cast<void*>(equal);
37}
38
39TEST(string, strerror_concurrent) {
40  const char* strerror1001 = strerror(1001);
41  ASSERT_STREQ("Unknown error 1001", strerror1001);
42
43  pthread_t t;
44  ASSERT_EQ(0, pthread_create(&t, NULL, ConcurrentStrErrorFn, NULL));
45  void* result;
46  ASSERT_EQ(0, pthread_join(t, &result));
47  ASSERT_TRUE(static_cast<bool>(result));
48
49  ASSERT_STREQ("Unknown error 1001", strerror1001);
50}
51
52#endif
53
54#if __BIONIC__ // glibc's strerror_r doesn't even have the same signature as the POSIX one.
55TEST(string, strerror_r) {
56  char buf[256];
57
58  // Valid.
59  ASSERT_EQ(0, strerror_r(0, buf, sizeof(buf)));
60  ASSERT_STREQ("Success", buf);
61  ASSERT_EQ(0, strerror_r(1, buf, sizeof(buf)));
62  ASSERT_STREQ("Operation not permitted", buf);
63
64  // Invalid.
65  ASSERT_EQ(0, strerror_r(-1, buf, sizeof(buf)));
66  ASSERT_STREQ("Unknown error 4294967295", buf);
67  ASSERT_EQ(0, strerror_r(1234, buf, sizeof(buf)));
68  ASSERT_STREQ("Unknown error 1234", buf);
69
70  // Buffer too small.
71  ASSERT_EQ(-1, strerror_r(0, buf, 2));
72  ASSERT_EQ(ERANGE, errno);
73}
74#endif
75
76TEST(string, strsignal) {
77  // A regular signal.
78  ASSERT_STREQ("Hangup", strsignal(1));
79
80  // A real-time signal.
81#ifdef __GLIBC__ // glibc reserves real-time signals for internal use, and doesn't count those.
82  ASSERT_STREQ("Real-time signal 14", strsignal(48));
83#else
84  ASSERT_STREQ("Real-time signal 16", strsignal(48));
85#endif
86
87  // Errors.
88  ASSERT_STREQ("Unknown signal -1", strsignal(-1)); // Too small.
89  ASSERT_STREQ("Unknown signal 0", strsignal(0)); // Still too small.
90  ASSERT_STREQ("Unknown signal 1234", strsignal(1234)); // Too large.
91}
92
93static void* ConcurrentStrSignalFn(void*) {
94  bool equal = (strcmp("Unknown signal 2002", strsignal(2002)) == 0);
95  return reinterpret_cast<void*>(equal);
96}
97
98TEST(string, strsignal_concurrent) {
99  const char* strsignal1001 = strsignal(1001);
100  ASSERT_STREQ("Unknown signal 1001", strsignal1001);
101
102  pthread_t t;
103  ASSERT_EQ(0, pthread_create(&t, NULL, ConcurrentStrSignalFn, NULL));
104  void* result;
105  ASSERT_EQ(0, pthread_join(t, &result));
106  ASSERT_TRUE(static_cast<bool>(result));
107
108  ASSERT_STREQ("Unknown signal 1001", strsignal1001);
109}
110