Deadlock in `with_exclusive()`

[ludfjig]

Repro: The number of iteration varies somewhat, 10_000 seems to consistently repro it though (on my machine)

fn main() -> hyperlight_host::Result<()> {
    // Create an uninitialized sandbox with a guest binary
    let u_sbox = UninitializedSandbox::new(
        hyperlight_host::GuestBinary::FilePath(
            hyperlight_testing::simple_guest_as_string().expect("Guest Binary Missing"),
        ),
        None,
        None,
        None,
    )
    .unwrap();
    let mut mu_sbox: MultiUseSandbox = u_sbox.evolve(Noop::default()).unwrap();

    for i in 0..10000 {
        let res = mu_sbox.call_guest_function_by_name(
            "PrintOutput",
            ReturnType::Int,
            Some(vec![ParameterValue::String(format!("Hello World {}", i))]),
        );
        match res {
            Ok(ReturnValue::Int(len)) => assert!(len >= 0),
            _ => panic!("Unexpected return value: {:?}", res),
        }
    }

    Ok(())
}

Unexpected return value: Err(Error("Error locking at src/hyperlight_host/src/mem/shared_mem.rs:1002: try_lock failed because the operation would block")). Happens both in release and dev profile

[ludfjig]

Unable to replicate on wsl(ubuntu) nor windows, did 100k iterations without any errors.