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// We want to control preemption here. Stacked borrows interferes by having its own accesses.
//@compile-flags: -Zmiri-preemption-rate=0 -Zmiri-disable-stacked-borrows
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 (1) Write on thread `<unnamed>` and (2) Write on thread `<unnamed>`
});
j1.join().unwrap();
j2.join().unwrap();
}
}
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