Integrated: 8361912: ThreadsListHandle::cv_internal_thread_to_JavaThread does not deal with a virtual thread's carrier thread

[David Holmes]

On Mon, 14 Jul 2025 05:34:57 GMT, David Holmes <dholmes at openjdk.org> wrote:

> The `cv_internal_thread_to_JavaThread` method will now check if the thread is a mounted virtual thread, and if so protect the carrier thread. User's of the API that need to deal with virtual threads must still check the carrier themselves as it could change asynchronously, but it is now guaranteed that the carrier JavaThread returned via this method cannot terminate whilst being used (the same as regular platform JavaThreads).
> 
> It was noticed whilst updating the documentation that the `JvmtiExport` variant `cv_oop_to_JavaThread` is unused and so can be removed.
> 
> Testing:
> - tiers 1-4
> 
> Thanks

This pull request has now been integrated.

Changeset: 46690051
Author:    David Holmes <dholmes at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/4669005123420d8dbe86740dd9bcbee04735bc4f
Stats:     84 lines in 4 files changed: 18 ins; 54 del; 12 mod

8361912: ThreadsListHandle::cv_internal_thread_to_JavaThread  does not deal with a virtual thread's carrier thread

Reviewed-by: pchilanomate, dcubed, amenkov, sspitsyn

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PR: https://git.openjdk.org/jdk/pull/26287