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

[Frederic Parain]

On Sat, 6 Jul 2024 20:37:56 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.

JNI's MonitorEnter issue has a proposed fixed in https://github.com/openjdk/valhalla/pull/1160

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PR Comment: https://git.openjdk.org/valhalla/pull/1158#issuecomment-2218587521