bionic/tests/stdlib_test.cpp

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include "TemporaryFile.h"
#include <errno.h>
#include <libgen.h>
#include <limits.h>
#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
TEST(stdlib, drand48) {
srand48(0x01020304);
EXPECT_DOUBLE_EQ(0.65619299195623526, drand48());
EXPECT_DOUBLE_EQ(0.18522597229772941, drand48());
EXPECT_DOUBLE_EQ(0.42015087072844537, drand48());
EXPECT_DOUBLE_EQ(0.061637783047395089, drand48());
}
TEST(stdlib, lrand48) {
srand48(0x01020304);
EXPECT_EQ(1409163720, lrand48());
EXPECT_EQ(397769746, lrand48());
EXPECT_EQ(902267124, lrand48());
EXPECT_EQ(132366131, lrand48());
}
TEST(stdlib, random) {
srandom(0x01020304);
EXPECT_EQ(55436735, random());
EXPECT_EQ(1399865117, random());
EXPECT_EQ(2032643283, random());
EXPECT_EQ(571329216, random());
}
TEST(stdlib, rand) {
srand(0x01020304);
EXPECT_EQ(55436735, rand());
EXPECT_EQ(1399865117, rand());
EXPECT_EQ(2032643283, rand());
EXPECT_EQ(571329216, rand());
}
TEST(stdlib, mrand48) {
srand48(0x01020304);
EXPECT_EQ(-1476639856, mrand48());
EXPECT_EQ(795539493, mrand48());
EXPECT_EQ(1804534249, mrand48());
EXPECT_EQ(264732262, mrand48());
}
TEST(stdlib, posix_memalign) {
void* p;
ASSERT_EQ(0, posix_memalign(&p, 512, 128));
ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(p) % 512);
free(p);
// Can't align to a non-power of 2.
ASSERT_EQ(EINVAL, posix_memalign(&p, 81, 128));
}
TEST(stdlib, realpath__NULL_filename) {
errno = 0;
char* p = realpath(NULL, NULL);
ASSERT_TRUE(p == NULL);
ASSERT_EQ(EINVAL, errno);
}
TEST(stdlib, realpath__empty_filename) {
errno = 0;
char* p = realpath("", NULL);
ASSERT_TRUE(p == NULL);
ASSERT_EQ(ENOENT, errno);
}
TEST(stdlib, realpath__ENOENT) {
errno = 0;
char* p = realpath("/this/directory/path/almost/certainly/does/not/exist", NULL);
ASSERT_TRUE(p == NULL);
ASSERT_EQ(ENOENT, errno);
}
TEST(stdlib, realpath) {
// Get the name of this executable.
char executable_path[PATH_MAX];
int rc = readlink("/proc/self/exe", executable_path, sizeof(executable_path));
ASSERT_NE(rc, -1);
executable_path[rc] = '\0';
char buf[PATH_MAX + 1];
char* p = realpath("/proc/self/exe", buf);
ASSERT_STREQ(executable_path, p);
p = realpath("/proc/self/exe", NULL);
ASSERT_STREQ(executable_path, p);
free(p);
}
TEST(stdlib, qsort) {
struct s {
char name[16];
static int comparator(const void* lhs, const void* rhs) {
return strcmp(reinterpret_cast<const s*>(lhs)->name, reinterpret_cast<const s*>(rhs)->name);
}
};
s entries[3];
strcpy(entries[0].name, "charlie");
strcpy(entries[1].name, "bravo");
strcpy(entries[2].name, "alpha");
qsort(entries, 3, sizeof(s), s::comparator);
ASSERT_STREQ("alpha", entries[0].name);
ASSERT_STREQ("bravo", entries[1].name);
ASSERT_STREQ("charlie", entries[2].name);
qsort(entries, 3, sizeof(s), s::comparator);
ASSERT_STREQ("alpha", entries[0].name);
ASSERT_STREQ("bravo", entries[1].name);
ASSERT_STREQ("charlie", entries[2].name);
}
static void* TestBug57421_child(void* arg) {
pthread_t main_thread = reinterpret_cast<pthread_t>(arg);
pthread_join(main_thread, NULL);
char* value = getenv("ENVIRONMENT_VARIABLE");
if (value == NULL) {
setenv("ENVIRONMENT_VARIABLE", "value", 1);
}
return NULL;
}
static void TestBug57421_main() {
pthread_t t;
ASSERT_EQ(0, pthread_create(&t, NULL, TestBug57421_child, reinterpret_cast<void*>(pthread_self())));
pthread_exit(NULL);
}
// Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to
// run this test (which exits normally) in its own process.
TEST(stdlib_DeathTest, getenv_after_main_thread_exits) {
// https://code.google.com/p/android/issues/detail?id=57421
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(TestBug57421_main(), ::testing::ExitedWithCode(0), "");
}
TEST(stdlib, mkstemp) {
TemporaryFile tf;
struct stat sb;
ASSERT_EQ(0, fstat(tf.fd, &sb));
}
TEST(stdlib, mkstemp64) {
GenericTemporaryFile<mkstemp64> tf;
struct stat64 sb;
ASSERT_EQ(0, fstat64(tf.fd, &sb));
ASSERT_EQ(O_LARGEFILE, fcntl(tf.fd, F_GETFL) & O_LARGEFILE);
}
TEST(stdlib, system) {
int status;
status = system("exit 0");
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(0, WEXITSTATUS(status));
status = system("exit 1");
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(1, WEXITSTATUS(status));
}
TEST(stdlib, atof) {
ASSERT_DOUBLE_EQ(1.23, atof("1.23"));
}
TEST(stdlib, strtod) {
ASSERT_DOUBLE_EQ(1.23, strtod("1.23", NULL));
}
TEST(stdlib, strtof) {
ASSERT_FLOAT_EQ(1.23, strtof("1.23", NULL));
}
TEST(stdlib, strtold) {
ASSERT_DOUBLE_EQ(1.23, strtold("1.23", NULL));
}
TEST(stdlib, quick_exit) {
pid_t pid = fork();
ASSERT_NE(-1, pid) << strerror(errno);
if (pid == 0) {
quick_exit(99);
}
int status;
ASSERT_EQ(pid, waitpid(pid, &status, 0));
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(99, WEXITSTATUS(status));
}
static int quick_exit_status = 0;
static void quick_exit_1(void) {
ASSERT_EQ(quick_exit_status, 0);
quick_exit_status = 1;
}
static void quick_exit_2(void) {
ASSERT_EQ(quick_exit_status, 1);
}
static void not_run(void) {
FAIL();
}
TEST(stdlib, at_quick_exit) {
pid_t pid = fork();
ASSERT_NE(-1, pid) << strerror(errno);
if (pid == 0) {
ASSERT_EQ(at_quick_exit(quick_exit_2), 0);
ASSERT_EQ(at_quick_exit(quick_exit_1), 0);
atexit(not_run);
quick_exit(99);
}
int status;
ASSERT_EQ(pid, waitpid(pid, &status, 0));
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(99, WEXITSTATUS(status));
}
TEST(unistd, _Exit) {
int pid = fork();
ASSERT_NE(-1, pid) << strerror(errno);
if (pid == 0) {
_Exit(99);
}
int status;
ASSERT_EQ(pid, waitpid(pid, &status, 0));
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(99, WEXITSTATUS(status));
}
TEST(stdlib, pty_smoke) {
// getpt returns a pty with O_RDWR|O_NOCTTY.
int fd = getpt();
ASSERT_NE(-1, fd);
// grantpt is a no-op.
ASSERT_EQ(0, grantpt(fd));
// ptsname_r should start "/dev/pts/".
char name_r[128];
ASSERT_EQ(0, ptsname_r(fd, name_r, sizeof(name_r)));
name_r[9] = 0;
ASSERT_STREQ("/dev/pts/", name_r);
close(fd);
}
TEST(stdlib, posix_openpt) {
int fd = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC);
ASSERT_NE(-1, fd);
close(fd);
}
TEST(stdlib, ptsname_r_ENOTTY) {
errno = 0;
char buf[128];
ASSERT_EQ(ENOTTY, ptsname_r(STDOUT_FILENO, buf, sizeof(buf)));
ASSERT_EQ(ENOTTY, errno);
}
TEST(stdlib, ptsname_r_EINVAL) {
int fd = getpt();
ASSERT_NE(-1, fd);
errno = 0;
char* buf = NULL;
ASSERT_EQ(EINVAL, ptsname_r(fd, buf, 128));
ASSERT_EQ(EINVAL, errno);
close(fd);
}
TEST(stdlib, ptsname_r_ERANGE) {
int fd = getpt();
ASSERT_NE(-1, fd);
errno = 0;
char buf[1];
ASSERT_EQ(ERANGE, ptsname_r(fd, buf, sizeof(buf)));
ASSERT_EQ(ERANGE, errno);
close(fd);
}
TEST(stdlib, ttyname_r) {
int fd = getpt();
ASSERT_NE(-1, fd);
// ttyname_r returns "/dev/ptmx" for a pty.
char name_r[128];
ASSERT_EQ(0, ttyname_r(fd, name_r, sizeof(name_r)));
ASSERT_STREQ("/dev/ptmx", name_r);
close(fd);
}
TEST(stdlib, ttyname_r_ENOTTY) {
int fd = open("/dev/null", O_WRONLY);
errno = 0;
char buf[128];
ASSERT_EQ(ENOTTY, ttyname_r(fd, buf, sizeof(buf)));
ASSERT_EQ(ENOTTY, errno);
close(fd);
}
TEST(stdlib, ttyname_r_EINVAL) {
int fd = getpt();
ASSERT_NE(-1, fd);
errno = 0;
char* buf = NULL;
ASSERT_EQ(EINVAL, ttyname_r(fd, buf, 128));
ASSERT_EQ(EINVAL, errno);
close(fd);
}
TEST(stdlib, ttyname_r_ERANGE) {
int fd = getpt();
ASSERT_NE(-1, fd);
errno = 0;
char buf[1];
ASSERT_EQ(ERANGE, ttyname_r(fd, buf, sizeof(buf)));
ASSERT_EQ(ERANGE, errno);
close(fd);
}
TEST(stdlib, unlockpt_ENOTTY) {
int fd = open("/dev/null", O_WRONLY);
errno = 0;
ASSERT_EQ(-1, unlockpt(fd));
ASSERT_EQ(ENOTTY, errno);
close(fd);
}