[master] RFR: 8300733: [Lilliput] Enable fast-locking for Lilliput [v3]

[Aleksey Shipilev]

On Mon, 23 Jan 2023 10:42:02 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> Fast-locking provides many advantages for Lilliput. Most importantly, it greatly simplifies the access of the mark word: we no longer need to handle the case of stack-locking which has been racy and complicated.
>> 
>> This change enables fast-locking, but doesn't yet touch any of the improvements that it provides (simpler loading of Klass*, etc).
>> 
>> Testing:
>>  - [x] tier1
>>  - [x] tier2
>
> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix/revert Shenandoah forwarding protocol to not use INFLATING 2-step

Marked as reviewed by shade (Committer).

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PR: https://git.openjdk.org/lilliput/pull/64