bionic/tests/unistd_test.cpp
Elliott Hughes 0b2acdfcc9 Use const auto& in for loops.
Change-Id: Ic437c59797ee4e7dc38291da35c72d827bc89c8d
2015-10-02 18:25:19 -07:00

867 lines
27 KiB
C++

/*
* 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 "BionicDeathTest.h"
#include "ScopedSignalHandler.h"
#include "TemporaryFile.h"
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdint.h>
#include <sys/param.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <unistd.h>
#include <base/file.h>
#include <base/strings.h>
#include "private/get_cpu_count_from_string.h"
static void* get_brk() {
return sbrk(0);
}
static void* page_align(uintptr_t addr) {
uintptr_t mask = sysconf(_SC_PAGE_SIZE) - 1;
return reinterpret_cast<void*>((addr + mask) & ~mask);
}
TEST(unistd, brk) {
void* initial_break = get_brk();
// The kernel aligns the break to a page.
void* new_break = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(initial_break) + 1);
ASSERT_EQ(0, brk(new_break));
ASSERT_GE(get_brk(), new_break);
new_break = page_align(reinterpret_cast<uintptr_t>(initial_break) + sysconf(_SC_PAGE_SIZE));
ASSERT_EQ(0, brk(new_break));
ASSERT_EQ(get_brk(), new_break);
}
TEST(unistd, brk_ENOMEM) {
ASSERT_EQ(-1, brk(reinterpret_cast<void*>(-1)));
ASSERT_EQ(ENOMEM, errno);
}
#if defined(__GLIBC__)
#define SBRK_MIN INTPTR_MIN
#define SBRK_MAX INTPTR_MAX
#else
#define SBRK_MIN PTRDIFF_MIN
#define SBRK_MAX PTRDIFF_MAX
#endif
TEST(unistd, sbrk_ENOMEM) {
#if defined(__BIONIC__) && !defined(__LP64__)
// There is no way to guarantee that all overflow conditions can be tested
// without manipulating the underlying values of the current break.
extern void* __bionic_brk;
class ScopedBrk {
public:
ScopedBrk() : saved_brk_(__bionic_brk) {}
virtual ~ScopedBrk() { __bionic_brk = saved_brk_; }
private:
void* saved_brk_;
};
ScopedBrk scope_brk;
// Set the current break to a point that will cause an overflow.
__bionic_brk = reinterpret_cast<void*>(static_cast<uintptr_t>(PTRDIFF_MAX) + 2);
// Can't increase by so much that we'd overflow.
ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(PTRDIFF_MAX));
ASSERT_EQ(ENOMEM, errno);
// Set the current break to a point that will cause an overflow.
__bionic_brk = reinterpret_cast<void*>(static_cast<uintptr_t>(PTRDIFF_MAX));
ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(PTRDIFF_MIN));
ASSERT_EQ(ENOMEM, errno);
__bionic_brk = reinterpret_cast<void*>(static_cast<uintptr_t>(PTRDIFF_MAX) - 1);
ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(PTRDIFF_MIN + 1));
ASSERT_EQ(ENOMEM, errno);
#else
class ScopedBrk {
public:
ScopedBrk() : saved_brk_(get_brk()) {}
virtual ~ScopedBrk() { brk(saved_brk_); }
private:
void* saved_brk_;
};
ScopedBrk scope_brk;
uintptr_t cur_brk = reinterpret_cast<uintptr_t>(get_brk());
if (cur_brk < static_cast<uintptr_t>(-(SBRK_MIN+1))) {
// Do the overflow test for a max negative increment.
ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(SBRK_MIN));
#if defined(__BIONIC__)
// GLIBC does not set errno in overflow case.
ASSERT_EQ(ENOMEM, errno);
#endif
}
uintptr_t overflow_brk = static_cast<uintptr_t>(SBRK_MAX) + 2;
if (cur_brk < overflow_brk) {
// Try and move the value to PTRDIFF_MAX + 2.
cur_brk = reinterpret_cast<uintptr_t>(sbrk(overflow_brk));
}
if (cur_brk >= overflow_brk) {
ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(SBRK_MAX));
#if defined(__BIONIC__)
// GLIBC does not set errno in overflow case.
ASSERT_EQ(ENOMEM, errno);
#endif
}
#endif
}
TEST(unistd, truncate) {
TemporaryFile tf;
ASSERT_EQ(0, close(tf.fd));
ASSERT_EQ(0, truncate(tf.filename, 123));
struct stat sb;
ASSERT_EQ(0, stat(tf.filename, &sb));
ASSERT_EQ(123, sb.st_size);
}
TEST(unistd, truncate64) {
TemporaryFile tf;
ASSERT_EQ(0, close(tf.fd));
ASSERT_EQ(0, truncate64(tf.filename, 123));
struct stat sb;
ASSERT_EQ(0, stat(tf.filename, &sb));
ASSERT_EQ(123, sb.st_size);
}
TEST(unistd, ftruncate) {
TemporaryFile tf;
ASSERT_EQ(0, ftruncate(tf.fd, 123));
ASSERT_EQ(0, close(tf.fd));
struct stat sb;
ASSERT_EQ(0, stat(tf.filename, &sb));
ASSERT_EQ(123, sb.st_size);
}
TEST(unistd, ftruncate64) {
TemporaryFile tf;
ASSERT_EQ(0, ftruncate64(tf.fd, 123));
ASSERT_EQ(0, close(tf.fd));
struct stat sb;
ASSERT_EQ(0, stat(tf.filename, &sb));
ASSERT_EQ(123, sb.st_size);
}
TEST(unistd, ftruncate_negative) {
TemporaryFile tf;
errno = 0;
ASSERT_EQ(-1, ftruncate(tf.fd, -123));
ASSERT_EQ(EINVAL, errno);
}
static bool g_pause_test_flag = false;
static void PauseTestSignalHandler(int) {
g_pause_test_flag = true;
}
TEST(unistd, pause) {
ScopedSignalHandler handler(SIGALRM, PauseTestSignalHandler);
alarm(1);
ASSERT_FALSE(g_pause_test_flag);
ASSERT_EQ(-1, pause());
ASSERT_TRUE(g_pause_test_flag);
}
TEST(unistd, read) {
int fd = open("/proc/version", O_RDONLY);
ASSERT_TRUE(fd != -1);
char buf[5];
ASSERT_EQ(5, read(fd, buf, 5));
ASSERT_EQ(buf[0], 'L');
ASSERT_EQ(buf[1], 'i');
ASSERT_EQ(buf[2], 'n');
ASSERT_EQ(buf[3], 'u');
ASSERT_EQ(buf[4], 'x');
close(fd);
}
TEST(unistd, read_EBADF) {
// read returns ssize_t which is 64-bits on LP64, so it's worth explicitly checking that
// our syscall stubs correctly return a 64-bit -1.
char buf[1];
ASSERT_EQ(-1, read(-1, buf, sizeof(buf)));
ASSERT_EQ(EBADF, errno);
}
TEST(unistd, syscall_long) {
// Check that syscall(3) correctly returns long results.
// https://code.google.com/p/android/issues/detail?id=73952
// We assume that the break is > 4GiB, but this is potentially flaky.
uintptr_t p = reinterpret_cast<uintptr_t>(sbrk(0));
ASSERT_EQ(p, static_cast<uintptr_t>(syscall(__NR_brk, 0)));
}
TEST(unistd, alarm) {
ASSERT_EQ(0U, alarm(0));
}
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(unistd, getenv_unsetenv) {
ASSERT_EQ(0, setenv("test-variable", "hello", 1));
ASSERT_STREQ("hello", getenv("test-variable"));
ASSERT_EQ(0, unsetenv("test-variable"));
ASSERT_TRUE(getenv("test-variable") == NULL);
}
TEST(unistd, unsetenv_EINVAL) {
EXPECT_EQ(-1, unsetenv(""));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, unsetenv("a=b"));
EXPECT_EQ(EINVAL, errno);
}
TEST(unistd, setenv_EINVAL) {
EXPECT_EQ(-1, setenv(NULL, "value", 0));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, setenv(NULL, "value", 1));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, setenv("", "value", 0));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, setenv("", "value", 1));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, setenv("a=b", "value", 0));
EXPECT_EQ(EINVAL, errno);
EXPECT_EQ(-1, setenv("a=b", "value", 1));
EXPECT_EQ(EINVAL, errno);
}
TEST(unistd, setenv) {
ASSERT_EQ(0, unsetenv("test-variable"));
char a[] = "a";
char b[] = "b";
char c[] = "c";
// New value.
EXPECT_EQ(0, setenv("test-variable", a, 0));
EXPECT_STREQ(a, getenv("test-variable"));
// Existing value, no overwrite.
EXPECT_EQ(0, setenv("test-variable", b, 0));
EXPECT_STREQ(a, getenv("test-variable"));
// Existing value, overwrite.
EXPECT_EQ(0, setenv("test-variable", c, 1));
EXPECT_STREQ(c, getenv("test-variable"));
// But the arrays backing the values are unchanged.
EXPECT_EQ('a', a[0]);
EXPECT_EQ('b', b[0]);
EXPECT_EQ('c', c[0]);
ASSERT_EQ(0, unsetenv("test-variable"));
}
TEST(unistd, putenv) {
ASSERT_EQ(0, unsetenv("a"));
char* s1 = strdup("a=b");
ASSERT_EQ(0, putenv(s1));
ASSERT_STREQ("b", getenv("a"));
s1[2] = 'c';
ASSERT_STREQ("c", getenv("a"));
char* s2 = strdup("a=b");
ASSERT_EQ(0, putenv(s2));
ASSERT_STREQ("b", getenv("a"));
ASSERT_EQ('c', s1[2]);
ASSERT_EQ(0, unsetenv("a"));
free(s1);
free(s2);
}
TEST(unistd, clearenv) {
extern char** environ;
// Guarantee that environ is not initially empty...
ASSERT_EQ(0, setenv("test-variable", "a", 1));
// Stash a copy.
std::vector<char*> old_environ;
for (size_t i = 0; environ[i] != NULL; ++i) {
old_environ.push_back(strdup(environ[i]));
}
ASSERT_EQ(0, clearenv());
EXPECT_TRUE(environ == NULL || environ[0] == NULL);
EXPECT_EQ(NULL, getenv("test-variable"));
EXPECT_EQ(0, setenv("test-variable", "post-clear", 1));
EXPECT_STREQ("post-clear", getenv("test-variable"));
// Put the old environment back.
for (size_t i = 0; i < old_environ.size(); ++i) {
EXPECT_EQ(0, putenv(old_environ[i]));
}
// Check it wasn't overwritten.
EXPECT_STREQ("a", getenv("test-variable"));
EXPECT_EQ(0, unsetenv("test-variable"));
}
static void TestFsyncFunction(int (*fn)(int)) {
int fd;
// Can't sync an invalid fd.
errno = 0;
EXPECT_EQ(-1, fn(-1));
EXPECT_EQ(EBADF, errno);
// It doesn't matter whether you've opened a file for write or not.
TemporaryFile tf;
ASSERT_NE(-1, tf.fd);
EXPECT_EQ(0, fn(tf.fd));
ASSERT_NE(-1, fd = open(tf.filename, O_RDONLY));
EXPECT_EQ(0, fn(fd));
close(fd);
ASSERT_NE(-1, fd = open(tf.filename, O_RDWR));
EXPECT_EQ(0, fn(fd));
close(fd);
// The fd can even be a directory.
ASSERT_NE(-1, fd = open("/", O_RDONLY));
EXPECT_EQ(0, fn(fd));
close(fd);
// But some file systems may choose to be fussy...
errno = 0;
ASSERT_NE(-1, fd = open("/proc/version", O_RDONLY));
EXPECT_EQ(-1, fn(fd));
EXPECT_EQ(EINVAL, errno);
close(fd);
}
TEST(unistd, fdatasync) {
TestFsyncFunction(fdatasync);
}
TEST(unistd, fsync) {
TestFsyncFunction(fsync);
}
static void AssertGetPidCorrect() {
// The loop is just to make manual testing/debugging with strace easier.
pid_t getpid_syscall_result = syscall(__NR_getpid);
for (size_t i = 0; i < 128; ++i) {
ASSERT_EQ(getpid_syscall_result, getpid());
}
}
static void TestGetPidCachingWithFork(int (*fork_fn)()) {
pid_t parent_pid = getpid();
ASSERT_EQ(syscall(__NR_getpid), parent_pid);
pid_t fork_result = fork_fn();
ASSERT_NE(fork_result, -1);
if (fork_result == 0) {
// We're the child.
AssertGetPidCorrect();
ASSERT_EQ(parent_pid, getppid());
_exit(123);
} else {
// We're the parent.
ASSERT_EQ(parent_pid, getpid());
int status;
ASSERT_EQ(fork_result, waitpid(fork_result, &status, 0));
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(123, WEXITSTATUS(status));
}
}
TEST(unistd, getpid_caching_and_fork) {
TestGetPidCachingWithFork(fork);
}
TEST(unistd, getpid_caching_and_vfork) {
TestGetPidCachingWithFork(vfork);
}
static int GetPidCachingCloneStartRoutine(void*) {
AssertGetPidCorrect();
return 123;
}
TEST(unistd, getpid_caching_and_clone) {
pid_t parent_pid = getpid();
ASSERT_EQ(syscall(__NR_getpid), parent_pid);
void* child_stack[1024];
int clone_result = clone(GetPidCachingCloneStartRoutine, &child_stack[1024], CLONE_NEWNS | SIGCHLD, NULL);
if (clone_result == -1 && errno == EPERM && getuid() != 0) {
GTEST_LOG_(INFO) << "This test only works if you have permission to CLONE_NEWNS; try running as root.\n";
return;
}
ASSERT_NE(clone_result, -1);
ASSERT_EQ(parent_pid, getpid());
int status;
ASSERT_EQ(clone_result, waitpid(clone_result, &status, 0));
ASSERT_TRUE(WIFEXITED(status));
ASSERT_EQ(123, WEXITSTATUS(status));
}
static void* GetPidCachingPthreadStartRoutine(void*) {
AssertGetPidCorrect();
return NULL;
}
TEST(unistd, getpid_caching_and_pthread_create) {
pid_t parent_pid = getpid();
pthread_t t;
ASSERT_EQ(0, pthread_create(&t, NULL, GetPidCachingPthreadStartRoutine, NULL));
ASSERT_EQ(parent_pid, getpid());
void* result;
ASSERT_EQ(0, pthread_join(t, &result));
ASSERT_EQ(NULL, result);
}
class unistd_DeathTest : public BionicDeathTest {};
TEST_F(unistd_DeathTest, abort) {
ASSERT_EXIT(abort(), testing::KilledBySignal(SIGABRT), "");
}
TEST(unistd, sethostname) {
// The permissions check happens before the argument check, so this will
// fail for a different reason if you're running as root than if you're
// not, but it'll fail either way. Checking that we have the symbol is about
// all we can do for sethostname(2).
ASSERT_EQ(-1, sethostname("", -1));
}
TEST(unistd, gethostname) {
char hostname[HOST_NAME_MAX + 1];
memset(hostname, 0, sizeof(hostname));
// Can we get the hostname with a big buffer?
ASSERT_EQ(0, gethostname(hostname, HOST_NAME_MAX));
// Can we get the hostname with a right-sized buffer?
errno = 0;
ASSERT_EQ(0, gethostname(hostname, strlen(hostname) + 1));
// Does uname(2) agree?
utsname buf;
ASSERT_EQ(0, uname(&buf));
ASSERT_EQ(0, strncmp(hostname, buf.nodename, SYS_NMLN));
ASSERT_GT(strlen(hostname), 0U);
// Do we correctly detect truncation?
errno = 0;
ASSERT_EQ(-1, gethostname(hostname, strlen(hostname)));
ASSERT_EQ(ENAMETOOLONG, errno);
}
TEST(unistd, pathconf_fpathconf) {
TemporaryFile tf;
long rc = 0L;
// As a file system's block size is always power of 2, the configure values
// for ALLOC and XFER should be power of 2 as well.
rc = pathconf(tf.filename, _PC_ALLOC_SIZE_MIN);
ASSERT_TRUE(rc > 0 && powerof2(rc));
rc = pathconf(tf.filename, _PC_REC_MIN_XFER_SIZE);
ASSERT_TRUE(rc > 0 && powerof2(rc));
rc = pathconf(tf.filename, _PC_REC_XFER_ALIGN);
ASSERT_TRUE(rc > 0 && powerof2(rc));
rc = fpathconf(tf.fd, _PC_ALLOC_SIZE_MIN);
ASSERT_TRUE(rc > 0 && powerof2(rc));
rc = fpathconf(tf.fd, _PC_REC_MIN_XFER_SIZE);
ASSERT_TRUE(rc > 0 && powerof2(rc));
rc = fpathconf(tf.fd, _PC_REC_XFER_ALIGN);
ASSERT_TRUE(rc > 0 && powerof2(rc));
}
TEST(unistd, _POSIX_macros_smoke) {
// Make a tight verification of _POSIX_* / _POSIX2_* / _XOPEN_* macros, to prevent change by mistake.
// Verify according to POSIX.1-2008.
EXPECT_EQ(200809L, _POSIX_VERSION);
EXPECT_EQ(_POSIX_VERSION, _POSIX_ADVISORY_INFO);
EXPECT_GT(_POSIX_AIO_LISTIO_MAX, 0);
EXPECT_GT(_POSIX_AIO_MAX, 0);
EXPECT_GT(_POSIX_ARG_MAX, 0);
EXPECT_GT(_POSIX_CHILD_MAX, 0);
EXPECT_NE(_POSIX_CHOWN_RESTRICTED, -1);
EXPECT_EQ(_POSIX_VERSION, _POSIX_CLOCK_SELECTION);
EXPECT_EQ(0, _POSIX_CPUTIME); // Use sysconf to detect support at runtime.
EXPECT_GT(_POSIX_DELAYTIMER_MAX, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_FSYNC);
EXPECT_GT(_POSIX_HOST_NAME_MAX, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_IPV6);
EXPECT_GT(_POSIX_JOB_CONTROL, 0);
EXPECT_GT(_POSIX_LINK_MAX, 0);
EXPECT_GT(_POSIX_LOGIN_NAME_MAX, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_MAPPED_FILES);
EXPECT_GT(_POSIX_MAX_CANON, 0);
EXPECT_GT(_POSIX_MAX_INPUT, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_MEMLOCK);
EXPECT_EQ(_POSIX_VERSION, _POSIX_MEMLOCK_RANGE);
EXPECT_EQ(_POSIX_VERSION, _POSIX_MEMORY_PROTECTION);
EXPECT_EQ(0, _POSIX_MONOTONIC_CLOCK);
EXPECT_GT(_POSIX_MQ_OPEN_MAX, 0);
EXPECT_GT(_POSIX_MQ_PRIO_MAX, 0);
EXPECT_GT(_POSIX_NAME_MAX, 0);
EXPECT_GT(_POSIX_NGROUPS_MAX, 0);
EXPECT_GT(_POSIX_NO_TRUNC, 0);
EXPECT_GT(_POSIX_OPEN_MAX, 0);
EXPECT_GT(_POSIX_PATH_MAX, 0);
EXPECT_GT(_POSIX_PIPE_BUF, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_PRIORITY_SCHEDULING);
EXPECT_EQ(_POSIX_VERSION, _POSIX_RAW_SOCKETS);
EXPECT_EQ(_POSIX_VERSION, _POSIX_READER_WRITER_LOCKS);
EXPECT_EQ(_POSIX_VERSION, _POSIX_REALTIME_SIGNALS);
EXPECT_GT(_POSIX_REGEXP, 0);
EXPECT_GT(_POSIX_RE_DUP_MAX, 0);
EXPECT_GT(_POSIX_SAVED_IDS, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_SEMAPHORES);
EXPECT_GT(_POSIX_SEM_NSEMS_MAX, 0);
EXPECT_GT(_POSIX_SEM_VALUE_MAX, 0);
EXPECT_GT(_POSIX_SHELL, 0);
EXPECT_GT(_POSIX_SIGQUEUE_MAX, 0);
EXPECT_EQ(-1, _POSIX_SPORADIC_SERVER);
EXPECT_GT(_POSIX_SSIZE_MAX, 0);
EXPECT_GT(_POSIX_STREAM_MAX, 0);
EXPECT_GT(_POSIX_SYMLINK_MAX, 0);
EXPECT_GT(_POSIX_SYMLOOP_MAX, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_SYNCHRONIZED_IO);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREADS);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_ATTR_STACKADDR);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_ATTR_STACKSIZE);
EXPECT_EQ(0, _POSIX_THREAD_CPUTIME); // Use sysconf to detect support at runtime.
EXPECT_GT(_POSIX_THREAD_DESTRUCTOR_ITERATIONS, 0);
EXPECT_EQ(_POSIX_THREAD_KEYS_MAX, 128);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIORITY_SCHEDULING);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIO_INHERIT);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIO_PROTECT);
EXPECT_EQ(-1, _POSIX_THREAD_ROBUST_PRIO_PROTECT);
EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_SAFE_FUNCTIONS);
EXPECT_EQ(-1, _POSIX_THREAD_SPORADIC_SERVER);
EXPECT_GT(_POSIX_THREAD_THREADS_MAX, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX_TIMEOUTS);
EXPECT_EQ(_POSIX_VERSION, _POSIX_TIMERS);
EXPECT_GT(_POSIX_TIMER_MAX, 0);
EXPECT_EQ(-1, _POSIX_TRACE);
EXPECT_EQ(-1, _POSIX_TRACE_EVENT_FILTER);
EXPECT_EQ(-1, _POSIX_TRACE_INHERIT);
EXPECT_EQ(-1, _POSIX_TRACE_LOG);
EXPECT_GT(_POSIX_TTY_NAME_MAX, 0);
EXPECT_EQ(-1, _POSIX_TYPED_MEMORY_OBJECTS);
EXPECT_GT(_POSIX_TZNAME_MAX, 0);
EXPECT_NE(-1, _POSIX_VDISABLE);
EXPECT_GT(_POSIX2_BC_BASE_MAX, 0);
EXPECT_GT(_POSIX2_BC_DIM_MAX, 0);
EXPECT_GT(_POSIX2_BC_SCALE_MAX, 0);
EXPECT_GT(_POSIX2_BC_STRING_MAX, 0);
EXPECT_GT(_POSIX2_CHARCLASS_NAME_MAX, 0);
EXPECT_GT(_POSIX2_COLL_WEIGHTS_MAX, 0);
EXPECT_EQ(_POSIX_VERSION, _POSIX2_C_BIND);
EXPECT_GT(_POSIX2_EXPR_NEST_MAX, 0);
EXPECT_GT(_POSIX2_LINE_MAX, 0);
EXPECT_GT(_POSIX2_RE_DUP_MAX, 0);
EXPECT_EQ(700, _XOPEN_VERSION);
EXPECT_GT(_XOPEN_IOV_MAX, 0);
EXPECT_GT(_XOPEN_UNIX, 0);
#if defined(__BIONIC__)
// These tests only pass on bionic, as bionic and glibc has different support on these macros.
// Macros like _POSIX_ASYNCHRONOUS_IO are not supported on bionic yet.
EXPECT_EQ(-1, _POSIX_ASYNCHRONOUS_IO);
EXPECT_EQ(-1, _POSIX_BARRIERS);
EXPECT_EQ(-1, _POSIX_MESSAGE_PASSING);
EXPECT_EQ(-1, _POSIX_PRIORITIZED_IO);
EXPECT_EQ(-1, _POSIX_SHARED_MEMORY_OBJECTS);
EXPECT_EQ(-1, _POSIX_SPAWN);
EXPECT_EQ(-1, _POSIX_SPIN_LOCKS);
EXPECT_EQ(-1, _POSIX_THREAD_PROCESS_SHARED);
EXPECT_EQ(-1, _POSIX_THREAD_ROBUST_PRIO_INHERIT);
EXPECT_EQ(-1, _POSIX2_VERSION);
EXPECT_EQ(-1, _POSIX2_CHAR_TERM);
EXPECT_EQ(-1, _POSIX2_C_DEV);
EXPECT_EQ(-1, _POSIX2_LOCALEDEF);
EXPECT_EQ(-1, _POSIX2_SW_DEV);
EXPECT_EQ(-1, _POSIX2_UPE);
EXPECT_EQ(-1, _XOPEN_ENH_I18N);
EXPECT_EQ(-1, _XOPEN_CRYPT);
EXPECT_EQ(-1, _XOPEN_LEGACY);
EXPECT_EQ(-1, _XOPEN_REALTIME);
EXPECT_EQ(-1, _XOPEN_REALTIME_THREADS);
EXPECT_EQ(-1, _XOPEN_SHM);
#endif // defined(__BIONIC__)
}
#define VERIFY_SYSCONF_NOT_SUPPORT(name) VerifySysconf(name, #name, [](long v){return v == -1;})
// sysconf() means unlimited when it returns -1 with errno unchanged.
#define VERIFY_SYSCONF_POSITIVE(name) \
VerifySysconf(name, #name, [](long v){return (v > 0 || v == -1);})
#define VERIFY_SYSCONF_POSIX_VERSION(name) \
VerifySysconf(name, #name, [](long v){return v == _POSIX_VERSION;})
static void VerifySysconf(int option, const char *option_name, bool (*verify)(long)) {
errno = 0;
long ret = sysconf(option);
EXPECT_TRUE(0 == errno && verify(ret)) << "name = " << option_name << ", ret = "
<< ret <<", Error Message: " << strerror(errno);
}
TEST(unistd, sysconf) {
VERIFY_SYSCONF_POSIX_VERSION(_SC_ADVISORY_INFO);
VERIFY_SYSCONF_POSITIVE(_SC_ARG_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_BC_BASE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_BC_DIM_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_BC_SCALE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_CHILD_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_CLK_TCK);
VERIFY_SYSCONF_POSITIVE(_SC_COLL_WEIGHTS_MAX);
VERIFY_SYSCONF_POSIX_VERSION(_SC_CPUTIME);
VERIFY_SYSCONF_POSITIVE(_SC_EXPR_NEST_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_LINE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_NGROUPS_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_OPEN_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_PASS_MAX);
VERIFY_SYSCONF_POSIX_VERSION(_SC_2_C_BIND);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_FORT_DEV);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_FORT_RUN);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_UPE);
VERIFY_SYSCONF_POSITIVE(_SC_JOB_CONTROL);
VERIFY_SYSCONF_POSITIVE(_SC_SAVED_IDS);
VERIFY_SYSCONF_POSIX_VERSION(_SC_VERSION);
VERIFY_SYSCONF_POSITIVE(_SC_RE_DUP_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_STREAM_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_TZNAME_MAX);
VerifySysconf(_SC_XOPEN_VERSION, "_SC_XOPEN_VERSION", [](long v){return v == _XOPEN_VERSION;});
VERIFY_SYSCONF_POSITIVE(_SC_ATEXIT_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_IOV_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_PAGESIZE);
VERIFY_SYSCONF_POSITIVE(_SC_PAGE_SIZE);
VerifySysconf(_SC_PAGE_SIZE, "_SC_PAGE_SIZE",
[](long v){return v == sysconf(_SC_PAGESIZE) && v == getpagesize();});
VERIFY_SYSCONF_POSITIVE(_SC_XOPEN_UNIX);
VERIFY_SYSCONF_POSITIVE(_SC_AIO_LISTIO_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_AIO_MAX);
VerifySysconf(_SC_AIO_PRIO_DELTA_MAX, "_SC_AIO_PRIO_DELTA_MAX", [](long v){return v >= 0;});
VERIFY_SYSCONF_POSITIVE(_SC_DELAYTIMER_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_MQ_OPEN_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_MQ_PRIO_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_RTSIG_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_SEM_NSEMS_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_SEM_VALUE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_TIMER_MAX);
VERIFY_SYSCONF_POSIX_VERSION(_SC_FSYNC);
VERIFY_SYSCONF_POSIX_VERSION(_SC_MAPPED_FILES);
VERIFY_SYSCONF_POSIX_VERSION(_SC_MEMLOCK);
VERIFY_SYSCONF_POSIX_VERSION(_SC_MEMLOCK_RANGE);
VERIFY_SYSCONF_POSIX_VERSION(_SC_MEMORY_PROTECTION);
VERIFY_SYSCONF_POSIX_VERSION(_SC_PRIORITY_SCHEDULING);
VERIFY_SYSCONF_POSIX_VERSION(_SC_REALTIME_SIGNALS);
VERIFY_SYSCONF_POSIX_VERSION(_SC_SEMAPHORES);
VERIFY_SYSCONF_POSIX_VERSION(_SC_SYNCHRONIZED_IO);
VERIFY_SYSCONF_POSIX_VERSION(_SC_TIMERS);
VERIFY_SYSCONF_POSITIVE(_SC_GETGR_R_SIZE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_GETPW_R_SIZE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_LOGIN_NAME_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_THREAD_DESTRUCTOR_ITERATIONS);
VERIFY_SYSCONF_POSITIVE(_SC_THREAD_KEYS_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_THREAD_STACK_MIN);
VERIFY_SYSCONF_POSITIVE(_SC_THREAD_THREADS_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_TTY_NAME_MAX);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREADS);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_ATTR_STACKADDR);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_ATTR_STACKSIZE);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIORITY_SCHEDULING);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIO_INHERIT);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIO_PROTECT);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_SAFE_FUNCTIONS);
VERIFY_SYSCONF_POSITIVE(_SC_NPROCESSORS_CONF);
VERIFY_SYSCONF_POSITIVE(_SC_NPROCESSORS_ONLN);
VERIFY_SYSCONF_POSITIVE(_SC_PHYS_PAGES);
VERIFY_SYSCONF_POSITIVE(_SC_AVPHYS_PAGES);
VERIFY_SYSCONF_POSIX_VERSION(_SC_MONOTONIC_CLOCK);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_ACCOUNTING);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_CHECKPOINT);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_LOCATE);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_MESSAGE);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_TRACK);
VERIFY_SYSCONF_POSIX_VERSION(_SC_CLOCK_SELECTION);
VERIFY_SYSCONF_POSITIVE(_SC_HOST_NAME_MAX);
VERIFY_SYSCONF_POSIX_VERSION(_SC_IPV6);
VERIFY_SYSCONF_POSIX_VERSION(_SC_RAW_SOCKETS);
VERIFY_SYSCONF_POSIX_VERSION(_SC_READER_WRITER_LOCKS);
VERIFY_SYSCONF_POSITIVE(_SC_REGEXP);
VERIFY_SYSCONF_POSITIVE(_SC_SHELL);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPORADIC_SERVER);
VERIFY_SYSCONF_POSITIVE(_SC_SYMLOOP_MAX);
VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_CPUTIME);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_SPORADIC_SERVER);
VERIFY_SYSCONF_POSIX_VERSION(_SC_TIMEOUTS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_EVENT_FILTER);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_EVENT_NAME_MAX);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_INHERIT);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_LOG);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_NAME_MAX);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_SYS_MAX);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_USER_EVENT_MAX);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_TYPED_MEMORY_OBJECTS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_STREAMS);
#if defined(__LP64__)
VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFF32);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFFBIG);
VERIFY_SYSCONF_POSITIVE(_SC_V7_LP64_OFF64);
VERIFY_SYSCONF_POSITIVE(_SC_V7_LPBIG_OFFBIG);
#else
VERIFY_SYSCONF_POSITIVE(_SC_V7_ILP32_OFF32);
#if defined(__BIONIC__)
// bionic does not support 64 bits off_t type on 32bit machine.
VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFFBIG);
#endif
VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_LP64_OFF64);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_LPBIG_OFFBIG);
#endif
#if defined(__BIONIC__)
// Tests can only run on bionic, as bionic and glibc have different support for these options.
// Below options are not supported on bionic yet.
VERIFY_SYSCONF_NOT_SUPPORT(_SC_ASYNCHRONOUS_IO);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_BARRIERS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_MESSAGE_PASSING);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_PRIORITIZED_IO);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_SHARED_MEMORY_OBJECTS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPAWN);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPIN_LOCKS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_PROCESS_SHARED);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_ROBUST_PRIO_INHERIT);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_ROBUST_PRIO_PROTECT);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_C_DEV);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_CHAR_TERM);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_LOCALEDEF);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_SW_DEV);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_VERSION);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_CRYPT);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_ENH_I18N);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_LEGACY);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_REALTIME);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_REALTIME_THREADS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_SHM);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_UUCP);
#endif // defined(__BIONIC__)
}
TEST(unistd, get_cpu_count_from_string) {
ASSERT_EQ(0, GetCpuCountFromString(" "));
ASSERT_EQ(1, GetCpuCountFromString("0"));
ASSERT_EQ(40, GetCpuCountFromString("0-39"));
ASSERT_EQ(4, GetCpuCountFromString("0, 1-2, 4\n"));
}
TEST(unistd, sysconf_SC_NPROCESSORS_ONLN) {
std::string line;
ASSERT_TRUE(android::base::ReadFileToString("/sys/devices/system/cpu/online", &line));
long online_cpus = 0;
for (const std::string& s : android::base::Split(line, ",")) {
std::vector<std::string> numbers = android::base::Split(s, "-");
if (numbers.size() == 1u) {
online_cpus++;
} else {
online_cpus += atoi(numbers[1].c_str()) - atoi(numbers[0].c_str()) + 1;
}
}
ASSERT_EQ(online_cpus, sysconf(_SC_NPROCESSORS_ONLN));
}
TEST(unistd, dup2_same) {
// POSIX says of dup2:
// If fildes2 is already a valid open file descriptor ...
// [and] fildes is equal to fildes2 ... dup2() shall return
// fildes2 without closing it.
// This isn't true of dup3(2), so we need to manually implement that.
// Equal and valid.
int fd = open("/proc/version", O_RDONLY);
ASSERT_TRUE(fd != -1);
ASSERT_EQ(fd, dup2(fd, fd));
ASSERT_EQ(0, close(fd)); // Check that dup2 didn't close fd.
// Equal, but invalid.
errno = 0;
ASSERT_EQ(-1, dup2(fd, fd));
ASSERT_EQ(EBADF, errno);
}