[master] RFR: Implement non-racy fast-locking [v3]

[Roman Kennke]

On Thu, 28 Jul 2022 09:02:38 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> I would need a lot of convincing that we should be doing anything upstream in this area "soon" given the current status of the two projects, but look forward to seeing such a proposal and its performance etc.

See https://github.com/openjdk/jdk/pull/9680 for how the upstream change would look like (WIP, but working on x86_64 already). That's without Lilliput parts (load-Klass*) and without extra benefits (e.g. hashcode optimizations).

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PR: https://git.openjdk.org/lilliput/pull/51