39 lines
931 B
Rust
39 lines
931 B
Rust
// ignore-windows: Concurrency on Windows is not supported yet.
|
|
|
|
use std::thread::spawn;
|
|
|
|
#[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() {
|
|
// Enable and then join with multiple threads.
|
|
let t1 = spawn(|| ());
|
|
let t2 = spawn(|| ());
|
|
let t3 = spawn(|| ());
|
|
let t4 = spawn(|| ());
|
|
t1.join().unwrap();
|
|
t2.join().unwrap();
|
|
t3.join().unwrap();
|
|
t4.join().unwrap();
|
|
|
|
// Perform write-write data race detection.
|
|
let mut a = 0u32;
|
|
let b = &mut a as *mut u32;
|
|
let c = EvilSend(b);
|
|
unsafe {
|
|
let j1 = spawn(move || {
|
|
*c.0 = 32;
|
|
});
|
|
|
|
let j2 = spawn(move || {
|
|
*c.0 = 64; //~ ERROR Data race detected between Write on thread `<unnamed>` and Write on thread `<unnamed>`
|
|
});
|
|
|
|
j1.join().unwrap();
|
|
j2.join().unwrap();
|
|
}
|
|
}
|