41 lines
1021 B
Rust
41 lines
1021 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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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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// Enable and then join with multiple threads.
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let t1 = spawn(|| ());
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let t2 = spawn(|| ());
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let t3 = spawn(|| ());
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let t4 = spawn(|| ());
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t1.join().unwrap();
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t2.join().unwrap();
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t3.join().unwrap();
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t4.join().unwrap();
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// Perform write-write data race detection.
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let mut a = 0u32;
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let b = &mut a as *mut u32;
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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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*c.0 = 32;
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});
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let j2 = spawn(move || {
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*c.0 = 64; //~ ERROR: Data race detected between Write on thread `<unnamed>` and Write 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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