rust/tests/fail/data_race/enable_after_join_to_main.rs
2022-07-01 20:13:44 -04:00

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();
}
}