RFR: 8291555: Implement alternative fast-locking scheme [v28]

[Roman Kennke]

On Thu, 16 Mar 2023 21:05:54 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

> > I pushed a fix for aarch64.
> 
> 
> 
> Do you think this is the cause for the -Xcheck:jni failures that I ran into
> 
> in my Tier4 testing?

Yes, and with high probability also for some/all of the other failures. It leads to the situation that when the lock-stack is full, it should take the slow-path, but doesn't (because the flags are not set correctly) and thus leave the object unlocked.

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PR: https://git.openjdk.org/jdk/pull/10907