stdlib_test.cpp revision a0beeeabbc8735bc830544cbbb1d920122b8d958 
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#include "TemporaryFile.h"
19
20#include <errno.h>
21#include <libgen.h>
22#include <limits.h>
23#include <pthread.h>
24#include <stdint.h>
25#include <stdlib.h>
26#include <fcntl.h>
27#include <sys/types.h>
28#include <sys/wait.h>
29
30TEST(stdlib, drand48) {
31  srand48(0x01020304);
32  EXPECT_DOUBLE_EQ(0.65619299195623526, drand48());
33  EXPECT_DOUBLE_EQ(0.18522597229772941, drand48());
34  EXPECT_DOUBLE_EQ(0.42015087072844537, drand48());
35  EXPECT_DOUBLE_EQ(0.061637783047395089, drand48());
36}
37
38TEST(stdlib, lrand48) {
39  srand48(0x01020304);
40  EXPECT_EQ(1409163720, lrand48());
41  EXPECT_EQ(397769746, lrand48());
42  EXPECT_EQ(902267124, lrand48());
43  EXPECT_EQ(132366131, lrand48());
44}
45
46TEST(stdlib, random) {
47  srandom(0x01020304);
48  EXPECT_EQ(55436735, random());
49  EXPECT_EQ(1399865117, random());
50  EXPECT_EQ(2032643283, random());
51  EXPECT_EQ(571329216, random());
52}
53
54TEST(stdlib, rand) {
55  srand(0x01020304);
56#if defined(__BIONIC__)
57  EXPECT_EQ(1675538669, rand());
58  EXPECT_EQ(1678228258, rand());
59  EXPECT_EQ(1352350131, rand());
60  EXPECT_EQ(824068976, rand());
61#else
62  EXPECT_EQ(55436735, rand());
63  EXPECT_EQ(1399865117, rand());
64  EXPECT_EQ(2032643283, rand());
65  EXPECT_EQ(571329216, rand());
66#endif
67}
68
69TEST(stdlib, mrand48) {
70  srand48(0x01020304);
71  EXPECT_EQ(-1476639856, mrand48());
72  EXPECT_EQ(795539493, mrand48());
73  EXPECT_EQ(1804534249, mrand48());
74  EXPECT_EQ(264732262, mrand48());
75}
76
77TEST(stdlib, posix_memalign) {
78  void* p;
79
80  ASSERT_EQ(0, posix_memalign(&p, 512, 128));
81  ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(p) % 512);
82  free(p);
83
84  // Can't align to a non-power of 2.
85  ASSERT_EQ(EINVAL, posix_memalign(&p, 81, 128));
86}
87
88TEST(stdlib, realpath__NULL_filename) {
89  errno = 0;
90  char* p = realpath(NULL, NULL);
91  ASSERT_TRUE(p == NULL);
92  ASSERT_EQ(EINVAL, errno);
93}
94
95TEST(stdlib, realpath__empty_filename) {
96  errno = 0;
97  char* p = realpath("", NULL);
98  ASSERT_TRUE(p == NULL);
99  ASSERT_EQ(ENOENT, errno);
100}
101
102TEST(stdlib, realpath__ENOENT) {
103  errno = 0;
104  char* p = realpath("/this/directory/path/almost/certainly/does/not/exist", NULL);
105  ASSERT_TRUE(p == NULL);
106  ASSERT_EQ(ENOENT, errno);
107}
108
109TEST(stdlib, realpath) {
110  // Get the name of this executable.
111  char executable_path[PATH_MAX];
112  int rc = readlink("/proc/self/exe", executable_path, sizeof(executable_path));
113  ASSERT_NE(rc, -1);
114  executable_path[rc] = '\0';
115
116  char buf[PATH_MAX + 1];
117  char* p = realpath("/proc/self/exe", buf);
118  ASSERT_STREQ(executable_path, p);
119
120  p = realpath("/proc/self/exe", NULL);
121  ASSERT_STREQ(executable_path, p);
122  free(p);
123}
124
125TEST(stdlib, qsort) {
126  struct s {
127    char name[16];
128    static int comparator(const void* lhs, const void* rhs) {
129      return strcmp(reinterpret_cast<const s*>(lhs)->name, reinterpret_cast<const s*>(rhs)->name);
130    }
131  };
132  s entries[3];
133  strcpy(entries[0].name, "charlie");
134  strcpy(entries[1].name, "bravo");
135  strcpy(entries[2].name, "alpha");
136
137  qsort(entries, 3, sizeof(s), s::comparator);
138  ASSERT_STREQ("alpha", entries[0].name);
139  ASSERT_STREQ("bravo", entries[1].name);
140  ASSERT_STREQ("charlie", entries[2].name);
141
142  qsort(entries, 3, sizeof(s), s::comparator);
143  ASSERT_STREQ("alpha", entries[0].name);
144  ASSERT_STREQ("bravo", entries[1].name);
145  ASSERT_STREQ("charlie", entries[2].name);
146}
147
148static void* TestBug57421_child(void* arg) {
149  pthread_t main_thread = reinterpret_cast<pthread_t>(arg);
150  pthread_join(main_thread, NULL);
151  char* value = getenv("ENVIRONMENT_VARIABLE");
152  if (value == NULL) {
153    setenv("ENVIRONMENT_VARIABLE", "value", 1);
154  }
155  return NULL;
156}
157
158static void TestBug57421_main() {
159  pthread_t t;
160  ASSERT_EQ(0, pthread_create(&t, NULL, TestBug57421_child, reinterpret_cast<void*>(pthread_self())));
161  pthread_exit(NULL);
162}
163
164// Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to
165// run this test (which exits normally) in its own process.
166TEST(stdlib_DeathTest, getenv_after_main_thread_exits) {
167  // https://code.google.com/p/android/issues/detail?id=57421
168  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
169  ASSERT_EXIT(TestBug57421_main(), ::testing::ExitedWithCode(0), "");
170}
171
172TEST(stdlib, mkstemp) {
173  TemporaryFile tf;
174  struct stat sb;
175  ASSERT_EQ(0, fstat(tf.fd, &sb));
176}
177
178TEST(stdlib, mkstemp64) {
179  GenericTemporaryFile<mkstemp64> tf;
180  struct stat64 sb;
181  ASSERT_EQ(0, fstat64(tf.fd, &sb));
182  ASSERT_EQ(O_LARGEFILE, fcntl(tf.fd, F_GETFL) & O_LARGEFILE);
183}
184
185TEST(stdlib, system) {
186  int status;
187
188  status = system("exit 0");
189  ASSERT_TRUE(WIFEXITED(status));
190  ASSERT_EQ(0, WEXITSTATUS(status));
191
192  status = system("exit 1");
193  ASSERT_TRUE(WIFEXITED(status));
194  ASSERT_EQ(1, WEXITSTATUS(status));
195}
196
197TEST(stdlib, atof) {
198  ASSERT_DOUBLE_EQ(1.23, atof("1.23"));
199}
200
201TEST(stdlib, strtod) {
202  ASSERT_DOUBLE_EQ(1.23, strtod("1.23", NULL));
203}
204
205TEST(stdlib, strtof) {
206  ASSERT_FLOAT_EQ(1.23, strtof("1.23", NULL));
207}
208
209TEST(stdlib, strtold) {
210  ASSERT_DOUBLE_EQ(1.23, strtold("1.23", NULL));
211}
212
213TEST(stdlib, quick_exit) {
214  pid_t pid = fork();
215  ASSERT_NE(-1, pid) << strerror(errno);
216
217  if (pid == 0) {
218    quick_exit(99);
219  }
220
221  int status;
222  ASSERT_EQ(pid, waitpid(pid, &status, 0));
223  ASSERT_TRUE(WIFEXITED(status));
224  ASSERT_EQ(99, WEXITSTATUS(status));
225}
226
227static int quick_exit_status = 0;
228
229static void quick_exit_1(void) {
230  ASSERT_EQ(quick_exit_status, 0);
231  quick_exit_status = 1;
232}
233
234static void quick_exit_2(void) {
235  ASSERT_EQ(quick_exit_status, 1);
236}
237
238static void not_run(void) {
239  FAIL();
240}
241
242TEST(stdlib, at_quick_exit) {
243  pid_t pid = fork();
244  ASSERT_NE(-1, pid) << strerror(errno);
245
246  if (pid == 0) {
247    ASSERT_EQ(at_quick_exit(quick_exit_2), 0);
248    ASSERT_EQ(at_quick_exit(quick_exit_1), 0);
249    atexit(not_run);
250    quick_exit(99);
251  }
252
253  int status;
254  ASSERT_EQ(pid, waitpid(pid, &status, 0));
255  ASSERT_TRUE(WIFEXITED(status));
256  ASSERT_EQ(99, WEXITSTATUS(status));
257}
258
259TEST(unistd, _Exit) {
260  int pid = fork();
261  ASSERT_NE(-1, pid) << strerror(errno);
262
263  if (pid == 0) {
264    _Exit(99);
265  }
266
267  int status;
268  ASSERT_EQ(pid, waitpid(pid, &status, 0));
269  ASSERT_TRUE(WIFEXITED(status));
270  ASSERT_EQ(99, WEXITSTATUS(status));
271}
272