[lworld] RFR: 8310023: [lworld] Implement alternative fast-locking scheme in Valhalla [v2]

[Frederic Parain]

On Tue, 9 Jul 2024 20:15:56 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> I don't see anything missing for implementing the test for inline types for lightweight locking.  The only thing broken seems to be JNI monitorenter should throw IdentityException.  I added some comments and asserts when I figured out the interpreter and c1/c2 don't get to ObjectSynchronizer::enter.
>> Tested with tier1 with LM_LIGHTWEIGHT as the default.
>
> Coleen Phillimore has refreshed the contents of this pull request, and previous commits have been removed. Incremental views are not available. The pull request now contains one commit:
> 
>   8310023: [lworld] Implement alternative fast-locking scheme in Valhalla

Marked as reviewed by fparain (Committer).

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PR Review: https://git.openjdk.org/valhalla/pull/1158#pullrequestreview-2167416364