34 lines
959 B
Rust
34 lines
959 B
Rust
// We want to control preemption here.
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//@compile-flags: -Zmiri-preemption-rate=0
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//@ignore-target-windows: Concurrency on Windows is not supported yet.
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#![feature(core_intrinsics)]
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use std::intrinsics::atomic_store;
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use std::sync::atomic::AtomicUsize;
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use std::thread::spawn;
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#[derive(Copy, Clone)]
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struct EvilSend<T>(pub T);
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unsafe impl<T> Send for EvilSend<T> {}
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unsafe impl<T> Sync for EvilSend<T> {}
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pub fn main() {
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let mut a = AtomicUsize::new(0);
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let b = &mut a as *mut AtomicUsize;
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let c = EvilSend(b);
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unsafe {
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let j1 = spawn(move || {
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let _val = *(c.0 as *mut usize);
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});
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let j2 = spawn(move || {
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//Equivalent to: (&*c.0).store(32, Ordering::SeqCst)
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atomic_store(c.0 as *mut usize, 32); //~ ERROR: Data race detected between Atomic Store on thread `<unnamed>` and Read on thread `<unnamed>`
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});
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j1.join().unwrap();
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j2.join().unwrap();
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}
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}
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