RFR: 8367982: Unify ObjectSynchronizer and LightweightSynchronizer [v2]

[Fredrik Bredberg]

On Mon, 27 Oct 2025 00:04:11 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Fredrik Bredberg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update after review
>
> src/hotspot/share/runtime/abstract_vm_version.hpp line 195:
> 
>> 193: 
>> 194:   // Is recursive fast locking implemented for this platform?
>> 195:   constexpr static bool supports_recursive_fast_locking() { return false; }
> 
> Next cleanup: this is supported on all platforms now, so we can get rid of this migration aid.

Not sure we can do that, since I don't find any implementation of recursive fast locking on ARM32.
@bulasevich Any comment on this?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27915#discussion_r2490583182