[master] RFR: 8302209: [Lilliput] Optimize fix-anon monitor owner path [v3]

[Thomas Stuefe]

On Wed, 8 Mar 2023 13:16:39 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> When trying to exit a monitor, we need to check if the current owner is anonymous, and if so, fix it before exiting the monitor. So far, we have been doing this by calling into the slow-path and handle it in the runtime. However, it is fairly easy to do in the fast-path and avoid calling into the runtime altogether. I also included those changes in [upstream fast-locking PR](https://github.com/openjdk/jdk/pull/10907).
>> 
>> Testing:
>>  - [x] tier1 (x86_64, aarch64)
>>  - [x] tier2 (x86_64, aarch64)
>>  - [ ] jcstress -t sync -m quick
>
> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Various fixes in response to Thomas' review

+1

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Marked as reviewed by stuefe (Committer).

PR: https://git.openjdk.org/lilliput/pull/74