RFR: 8371990: Remove two second delayed OOME after GC shutdown [v3]

[Albert Mingkun Yang]

On Tue, 18 Nov 2025 12:43:25 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> It also has the side-effect that it releases the Heap_lock and moves the thread into the blocked state. If we don't release the lock then we will not be able to complete the shutdown sequence, which acquires the Heap_lock before the exit VM operation (or shutting down the VM thread).
>
> I've pushed a comment stating the above. Maybe that helps explaining why Heap_lock->wait() is called.

> It also has the side-effect that it releases the Heap_lock ...

Yes. My msg was probably unclear; I meant to suggest using sth like:


Heap_lock->unlock();
{
  Semaphore always_blocked_sema{0};
  always_blocked_sema.wait(); // never return
}

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PR Review Comment: https://git.openjdk.org/jdk/pull/28349#discussion_r2538103942