Integrated: 8333750: GenShen: Only instantiate young/old generations in generational mode

[William Kemper]

On Thu, 6 Jun 2024 18:51:27 GMT, William Kemper <wkemper at openjdk.org> wrote:

> * Other modes should not instantiate or touch young/old generations.
> * The generation sizer has been put in its own file and moved out of shHeap
> * The logic for aging regions has been decoupled from non-generational final update refs

This pull request has now been integrated.

Changeset: 2abf4cb4
Author:    William Kemper <wkemper at openjdk.org>
URL:       https://git.openjdk.org/shenandoah/commit/2abf4cb43e84dda883a38abc6bcbac5aba3d7ce8
Stats:     890 lines in 22 files changed: 471 ins; 323 del; 96 mod

8333750: GenShen: Only instantiate young/old generations in generational mode

Reviewed-by: kdnilsen, ysr

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PR: https://git.openjdk.org/shenandoah/pull/444