RFR [XS] : 8205416 : windows: fix checking of CloseHandle return code in Java_java_io_FileCleanable_cleanupClose0

[Alan Bateman]

On 20/06/2018 13:16, Thomas Stüfe wrote:
> :
>
> I am curious whether we now get a bunch of follow up errors, since
> before we never catched a failing CloseHandle. A typical reason why
> this could fail would be a double close.
>
Yes, and it typically means that something is seriously broken. We had 
exactly this early in JDK 11 where some refactoring (to make use of 
Cleaner) introduced a bug that lead to random closing of sockets. So 
important that any failures like this are diagnosed quickly.
-Alan