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