fb50057138
glibc 2.15 has prlimit64, has an unsetenv that's declared nonnull, and hasn't fixed the problems we were having trying to use the POSIX strerror_r in C++ code. Change-Id: I834356a385e5ae55500bd86781691b6c1c9c8300
502 lines
13 KiB
C++
502 lines
13 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/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <sys/utsname.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
TEST(unistd, sysconf_SC_MONOTONIC_CLOCK) {
|
|
ASSERT_GT(sysconf(_SC_MONOTONIC_CLOCK), 0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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());
|
|
}
|
|
}
|
|
|
|
TEST(unistd, getpid_caching_and_fork) {
|
|
pid_t parent_pid = getpid();
|
|
ASSERT_EQ(syscall(__NR_getpid), parent_pid);
|
|
|
|
pid_t fork_result = fork();
|
|
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));
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|