RFR: 8337511: Implement JEP 404: Generational Shenandoah (Experimental) [v7]

[William Kemper]

On Tue, 19 Nov 2024 23:17:48 GMT, William Kemper <wkemper at openjdk.org> wrote:

>> src/hotspot/share/gc/shenandoah/shenandoahMarkClosures.hpp line 34:
>> 
>>> 32: class ShenandoahHeapRegion;
>>> 33: 
>>> 34: class ShenandoahFinalMarkUpdateRegionStateClosure : public ShenandoahHeapRegionClosure {
>> 
>> There is the `shenandoahHeapRegionClosures.hpp` for these, no?
>
> It wasn't the intention that `shenandoahHeapRegionClosures.hpp` should become home to all of the `*HeapRegionClosures`. `ShenandoahFinalMarkUpdateRegionStateClosure` is shared in a couple of implementation files, but not the same as the ones using `shenandoahHeapRegionClosures.hpp`. I think `ShenandoahUpdateCensusZeroCohortClosure` should be moved into the only implementation file that uses it.

https://bugs.openjdk.org/browse/JDK-8344779

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/21273#discussion_r1852709824