RFR: 8365880: Shenandoah: Unify memory usage accounting in ShenandoahFreeSet [v12]

[Kelvin Nilsen]

On Thu, 2 Oct 2025 23:12:01 GMT, William Kemper <wkemper at openjdk.org> wrote:

>> Kelvin Nilsen has updated the pull request incrementally with five additional commits since the last revision:
>> 
>>  - small refactoring
>>  - OO refinements to used_regions_size()
>>  - fix broken assert from previous commit
>>  - OO refinements to free_unaffiliated_regions()
>>  - OO refinements to max_capacity()
>
> src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp line 953:
> 
>> 951: }
>> 952: 
>> 953: size_t ShenandoahGeneration::max_capacity() const {
> 
> We never instantiate `ShenandoahGeneration` even non-generational mode gets `ShenandoahGlobalGeneration`. You could make these methods pure virtual. The implementation here should never be called.

Thanks.  Making this change also.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26867#discussion_r2411236294