1 files changed, 81 insertions, 0 deletions
diff --git a/tests/ui-fulldeps/std/issue-81357-unsound-file-methods.rs b/tests/ui-fulldeps/std/issue-81357-unsound-file-methods.rs
new file mode 100644
index 000000000..fdf1150f8
--- /dev/null
+++ b/tests/ui-fulldeps/std/issue-81357-unsound-file-methods.rs
@@ -0,0 +1,81 @@
+// run-fail
+// only-windows
+
+fn main() {
+    use std::fs;
+    use std::io::prelude::*;
+    use std::os::windows::prelude::*;
+    use std::ptr;
+    use std::sync::Arc;
+    use std::thread;
+    use std::time::Duration;
+
+    const FILE_FLAG_OVERLAPPED: u32 = 0x40000000;
+
+    fn create_pipe_server(path: &str) -> fs::File {
+        let mut path0 = path.as_bytes().to_owned();
+        path0.push(0);
+        extern "system" {
+            fn CreateNamedPipeA(
+                lpName: *const u8,
+                dwOpenMode: u32,
+                dwPipeMode: u32,
+                nMaxInstances: u32,
+                nOutBufferSize: u32,
+                nInBufferSize: u32,
+                nDefaultTimeOut: u32,
+                lpSecurityAttributes: *mut u8,
+            ) -> RawHandle;
+        }
+
+        unsafe {
+            let h = CreateNamedPipeA(path0.as_ptr(), 3, 0, 1, 0, 0, 0, ptr::null_mut());
+            assert_ne!(h as isize, -1);
+            fs::File::from_raw_handle(h)
+        }
+    }
+
+    let path = "\\\\.\\pipe\\repro";
+    let mut server = create_pipe_server(path);
+
+    let client = Arc::new(
+        fs::OpenOptions::new().custom_flags(FILE_FLAG_OVERLAPPED).read(true).open(path).unwrap(),
+    );
+
+    let spawn_read = |is_first: bool| {
+        thread::spawn({
+            let f = client.clone();
+            move || {
+                let mut buf = [0xcc; 1];
+                let mut f = f.as_ref();
+                f.read(&mut buf).unwrap();
+                if is_first {
+                    assert_ne!(buf[0], 0xcc);
+                } else {
+                    let b = buf[0]; // capture buf[0]
+                    thread::sleep(Duration::from_millis(200));
+
+                    // Check the buffer hasn't been written to after read.
+                    dbg!(buf[0], b);
+                    assert_eq!(buf[0], b);
+                }
+            }
+        })
+    };
+
+    let t1 = spawn_read(true);
+    thread::sleep(Duration::from_millis(20));
+    let t2 = spawn_read(false);
+    thread::sleep(Duration::from_millis(100));
+    let _ = server.write(b"x");
+    thread::sleep(Duration::from_millis(100));
+    let _ = server.write(b"y");
+
+    // This is run fail because we need to test for the `abort`.
+    // That failing to run is the success case.
+    if t1.join().is_err() || t2.join().is_err() {
+        return;
+    } else {
+        panic!("success");
+    }
+}