2020-11-04 21:35:48 +00:00
|
|
|
// ignore-windows: Concurrency on Windows is not supported yet.
|
|
|
|
#![feature(core_intrinsics)]
|
|
|
|
|
|
|
|
use std::intrinsics::atomic_store;
|
2022-06-19 20:33:59 -07:00
|
|
|
use std::sync::atomic::AtomicUsize;
|
|
|
|
use std::thread::spawn;
|
2020-11-04 21:35:48 +00:00
|
|
|
|
|
|
|
#[derive(Copy, Clone)]
|
|
|
|
struct EvilSend<T>(pub T);
|
|
|
|
|
|
|
|
unsafe impl<T> Send for EvilSend<T> {}
|
|
|
|
unsafe impl<T> Sync for EvilSend<T> {}
|
|
|
|
|
|
|
|
pub fn main() {
|
|
|
|
let mut a = AtomicUsize::new(0);
|
|
|
|
let b = &mut a as *mut AtomicUsize;
|
|
|
|
let c = EvilSend(b);
|
|
|
|
unsafe {
|
2022-06-20 02:43:06 -07:00
|
|
|
let j1 = spawn(move || {
|
|
|
|
let _val = *(c.0 as *mut usize);
|
|
|
|
});
|
2020-11-04 21:35:48 +00:00
|
|
|
|
|
|
|
let j2 = spawn(move || {
|
|
|
|
//Equivalent to: (&*c.0).store(32, Ordering::SeqCst)
|
2022-07-01 17:33:17 -04:00
|
|
|
atomic_store(c.0 as *mut usize, 32); //~ ERROR Data race detected between Atomic Store on thread `<unnamed>` and Read on thread `<unnamed>`
|
2020-11-04 21:35:48 +00:00
|
|
|
});
|
|
|
|
|
|
|
|
j1.join().unwrap();
|
|
|
|
j2.join().unwrap();
|
|
|
|
}
|
|
|
|
}
|