RFR: 8338383: Implement JEP 491: Synchronize Virtual Threads without Pinning

[Patricio Chilano Mateo]

On Mon, 28 Oct 2024 00:53:40 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> _cont_fastpath is what we check in freeze_internal to decide if we can take the fast path. Since we are calling from the interpreter we have to take the slow path. Added a comment.
>
> It seems somewhat of an oxymoron that to force a slow path we push a fastpath. ???

Yes, I find the name confusing too. But since this is pre-existent and to avoid the noise in the PR I would rather not change it here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21565#discussion_r1819831895