68 lines
2.1 KiB
Rust
68 lines
2.1 KiB
Rust
// ignore-windows: No libc on Windows
|
|
|
|
#![feature(rustc_private)]
|
|
extern crate libc;
|
|
|
|
use std::mem;
|
|
|
|
pub type Key = libc::pthread_key_t;
|
|
|
|
static mut RECORD : usize = 0;
|
|
static mut KEYS : [Key; 2] = [0; 2];
|
|
static mut GLOBALS : [u64; 2] = [1, 0];
|
|
|
|
static mut CANNARY : *mut u64 = 0 as *mut _; // this serves as a cannary: if TLS dtors are not run properly, this will not get deallocated, making the test fail.
|
|
|
|
pub unsafe fn create(dtor: Option<unsafe extern fn(*mut u8)>) -> Key {
|
|
let mut key = 0;
|
|
assert_eq!(libc::pthread_key_create(&mut key, mem::transmute(dtor)), 0);
|
|
key
|
|
}
|
|
|
|
pub unsafe fn set(key: Key, value: *mut u8) {
|
|
let r = libc::pthread_setspecific(key, value as *mut _);
|
|
assert_eq!(r, 0);
|
|
}
|
|
|
|
pub fn record(r: usize) {
|
|
assert!(r < 10);
|
|
unsafe { RECORD = RECORD*10 + r };
|
|
}
|
|
|
|
unsafe extern fn dtor(ptr: *mut u64) {
|
|
assert!(CANNARY != 0 as *mut _); // make sure we do not get run too often
|
|
let val = *ptr;
|
|
|
|
let which_key = GLOBALS.iter().position(|global| global as *const _ == ptr).expect("Should find my global");
|
|
record(which_key);
|
|
|
|
if val > 0 {
|
|
*ptr = val-1;
|
|
set(KEYS[which_key], ptr as *mut _);
|
|
}
|
|
|
|
// Check if the records matches what we expect. If yes, clear the cannary.
|
|
// If the record is wrong, the cannary will never get cleared, leading to a leak -> test fails.
|
|
// If the record is incomplete (i.e., more dtor calls happen), the check at the beginning of this function will fail -> test fails.
|
|
// The correct sequence is: First key 0, then key 1, then key 0.
|
|
if RECORD == 0_1_0 {
|
|
drop(Box::from_raw(CANNARY));
|
|
CANNARY = 0 as *mut _;
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
unsafe {
|
|
create(None); // check that the no-dtor case works
|
|
|
|
// Initialize the keys we use to check destructor ordering
|
|
for (key, global) in KEYS.iter_mut().zip(GLOBALS.iter_mut()) {
|
|
*key = create(Some(mem::transmute(dtor as unsafe extern fn(*mut u64))));
|
|
set(*key, global as *const _ as *mut _);
|
|
}
|
|
|
|
// Initialize cannary
|
|
CANNARY = Box::into_raw(Box::new(0u64));
|
|
}
|
|
}
|