rust/tests/compile-fail/data_race/dangling_thread_async_race.rs
2020-12-13 11:04:58 +00:00

45 lines
954 B
Rust

// ignore-windows: Concurrency on Windows is not supported yet.
// compile-flags: -Zmiri-disable-isolation
use std::thread::{spawn, sleep};
use std::time::Duration;
use std::mem;
#[derive(Copy, Clone)]
struct EvilSend<T>(pub T);
unsafe impl<T> Send for EvilSend<T> {}
unsafe impl<T> Sync for EvilSend<T> {}
fn main() {
let mut a = 0u32;
let b = &mut a as *mut u32;
let c = EvilSend(b);
let join = unsafe {
spawn(move || {
*c.0 = 32;
})
};
// Detatch the thread and sleep until it terminates
mem::drop(join);
sleep(Duration::from_millis(1000));
// Spawn and immediately join a thread
// to execute the join code-path
// and ensure that data-race detection
// remains enabled nevertheless.
spawn(|| ()).join().unwrap();
let join2 = unsafe {
spawn(move || {
*c.0 = 64; //~ ERROR Data race
})
};
join2.join().unwrap();
}