183 lines
8.2 KiB
Rust
183 lines
8.2 KiB
Rust
// ignore-windows: No libc on Windows
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// compile-flags: -Zmiri-disable-isolation
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#![feature(rustc_private)]
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extern crate libc;
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#[cfg(target_os = "linux")]
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fn tmp() -> std::path::PathBuf {
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std::env::var("MIRI_TEMP").map(std::path::PathBuf::from).unwrap_or_else(|_| std::env::temp_dir())
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}
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#[cfg(target_os = "linux")]
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fn test_posix_fadvise() {
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use std::convert::TryInto;
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use std::fs::{remove_file, File};
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use std::io::Write;
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use std::os::unix::io::AsRawFd;
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let path = tmp().join("miri_test_libc.txt");
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// Cleanup before test
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remove_file(&path).ok();
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// Set up an open file
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let mut file = File::create(&path).unwrap();
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let bytes = b"Hello, World!\n";
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file.write(bytes).unwrap();
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// Test calling posix_fadvise on a file.
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let result = unsafe {
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libc::posix_fadvise(
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file.as_raw_fd(),
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0,
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bytes.len().try_into().unwrap(),
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libc::POSIX_FADV_DONTNEED,
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)
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};
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drop(file);
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remove_file(&path).unwrap();
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assert_eq!(result, 0);
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}
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fn test_mutex_libc_init_recursive() {
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unsafe {
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let mut attr: libc::pthread_mutexattr_t = std::mem::zeroed();
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assert_eq!(libc::pthread_mutexattr_init(&mut attr as *mut _), 0);
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assert_eq!(libc::pthread_mutexattr_settype(&mut attr as *mut _, libc::PTHREAD_MUTEX_RECURSIVE), 0);
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let mut mutex: libc::pthread_mutex_t = std::mem::zeroed();
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assert_eq!(libc::pthread_mutex_init(&mut mutex as *mut _, &mut attr as *mut _), 0);
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assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_trylock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_trylock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), libc::EPERM);
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assert_eq!(libc::pthread_mutex_destroy(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutexattr_destroy(&mut attr as *mut _), 0);
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}
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}
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fn test_mutex_libc_init_normal() {
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unsafe {
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let mut mutexattr: libc::pthread_mutexattr_t = std::mem::zeroed();
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assert_eq!(libc::pthread_mutexattr_settype(&mut mutexattr as *mut _, 0x12345678), libc::EINVAL);
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assert_eq!(libc::pthread_mutexattr_settype(&mut mutexattr as *mut _, libc::PTHREAD_MUTEX_NORMAL), 0);
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let mut mutex: libc::pthread_mutex_t = std::mem::zeroed();
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assert_eq!(libc::pthread_mutex_init(&mut mutex as *mut _, &mutexattr as *const _), 0);
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assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_trylock(&mut mutex as *mut _), libc::EBUSY);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_trylock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_destroy(&mut mutex as *mut _), 0);
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}
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}
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fn test_mutex_libc_init_errorcheck() {
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unsafe {
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let mut mutexattr: libc::pthread_mutexattr_t = std::mem::zeroed();
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assert_eq!(libc::pthread_mutexattr_settype(&mut mutexattr as *mut _, libc::PTHREAD_MUTEX_ERRORCHECK), 0);
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let mut mutex: libc::pthread_mutex_t = std::mem::zeroed();
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assert_eq!(libc::pthread_mutex_init(&mut mutex as *mut _, &mutexattr as *const _), 0);
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assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_trylock(&mut mutex as *mut _), libc::EBUSY);
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assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), libc::EDEADLK);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_trylock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), libc::EPERM);
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assert_eq!(libc::pthread_mutex_destroy(&mut mutex as *mut _), 0);
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}
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}
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// Only linux provides PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP,
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// libc for macOS just has the default PTHREAD_MUTEX_INITIALIZER.
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#[cfg(target_os = "linux")]
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fn test_mutex_libc_static_initializer_recursive() {
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let mutex = std::cell::UnsafeCell::new(libc::PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP);
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unsafe {
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assert_eq!(libc::pthread_mutex_lock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_trylock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_unlock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_unlock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_trylock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_lock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_unlock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_unlock(mutex.get()), 0);
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assert_eq!(libc::pthread_mutex_unlock(mutex.get()), libc::EPERM);
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assert_eq!(libc::pthread_mutex_destroy(mutex.get()), 0);
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}
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}
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// Testing the behavior of std::sync::RwLock does not fully exercise the pthread rwlock shims, we
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// need to go a layer deeper and test the behavior of the libc functions, because
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// std::sys::unix::rwlock::RWLock itself keeps track of write_locked and num_readers.
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fn test_rwlock_libc_static_initializer() {
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let rw = std::cell::UnsafeCell::new(libc::PTHREAD_RWLOCK_INITIALIZER);
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unsafe {
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assert_eq!(libc::pthread_rwlock_rdlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_rdlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_tryrdlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_trywrlock(rw.get()), libc::EBUSY);
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assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_wrlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_tryrdlock(rw.get()), libc::EBUSY);
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assert_eq!(libc::pthread_rwlock_trywrlock(rw.get()), libc::EBUSY);
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assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_trywrlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_tryrdlock(rw.get()), libc::EBUSY);
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assert_eq!(libc::pthread_rwlock_trywrlock(rw.get()), libc::EBUSY);
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assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
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assert_eq!(libc::pthread_rwlock_destroy(rw.get()), 0);
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}
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}
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/// Test whether the `prctl` shim correctly sets the thread name.
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///
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/// Note: `prctl` exists only on Linux.
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#[cfg(target_os = "linux")]
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fn test_prctl_thread_name() {
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use std::ffi::CString;
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use libc::c_long;
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unsafe {
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let mut buf = [255; 10];
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assert_eq!(libc::prctl(libc::PR_GET_NAME, buf.as_mut_ptr() as c_long, 0 as c_long, 0 as c_long, 0 as c_long), 0);
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assert_eq!(b"<unnamed>\0", &buf);
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let thread_name = CString::new("hello").expect("CString::new failed");
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assert_eq!(libc::prctl(libc::PR_SET_NAME, thread_name.as_ptr() as c_long, 0 as c_long, 0 as c_long, 0 as c_long), 0);
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let mut buf = [255; 6];
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assert_eq!(libc::prctl(libc::PR_GET_NAME, buf.as_mut_ptr() as c_long, 0 as c_long, 0 as c_long, 0 as c_long), 0);
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assert_eq!(b"hello\0", &buf);
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let long_thread_name = CString::new("01234567890123456789").expect("CString::new failed");
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assert_eq!(libc::prctl(libc::PR_SET_NAME, long_thread_name.as_ptr() as c_long, 0 as c_long, 0 as c_long, 0 as c_long), 0);
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let mut buf = [255; 16];
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assert_eq!(libc::prctl(libc::PR_GET_NAME, buf.as_mut_ptr() as c_long, 0 as c_long, 0 as c_long, 0 as c_long), 0);
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assert_eq!(b"012345678901234\0", &buf);
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}
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}
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fn main() {
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#[cfg(target_os = "linux")]
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test_posix_fadvise();
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test_mutex_libc_init_recursive();
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test_mutex_libc_init_normal();
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test_mutex_libc_init_errorcheck();
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test_rwlock_libc_static_initializer();
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#[cfg(target_os = "linux")]
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test_mutex_libc_static_initializer_recursive();
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#[cfg(target_os = "linux")]
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test_prctl_thread_name();
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}
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