38 lines
1.0 KiB
Rust
38 lines
1.0 KiB
Rust
//@ignore-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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extern "Rust" {
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fn __rust_dealloc(ptr: *mut u8, size: usize, align: usize);
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}
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pub fn main() {
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// Shared atomic pointer
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let pointer: *mut usize = Box::into_raw(Box::new(0usize));
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let ptr = EvilSend(pointer);
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unsafe {
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let j1 = spawn(move || {
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__rust_dealloc(
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ptr.0 as *mut _,
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std::mem::size_of::<usize>(),
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std::mem::align_of::<usize>(),
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);
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});
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let j2 = spawn(move || {
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// Also an error of the form: Data race detected between Write on thread `<unnamed>` and Deallocate on thread `<unnamed>`
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// but the invalid allocation is detected first.
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*ptr.0 = 2; //~ ERROR dereferenced after this allocation got freed
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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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