Integrated: 8377043: Shenandoah: Convert ShenandoahHeapRegion related code to use Atomic<T>

[Ben Taylor]

On Wed, 4 Feb 2026 18:20:17 GMT, Ben Taylor <btaylor at openjdk.org> wrote:

> Modernizes ShenandoahHeapRegion code by replacing `AtomicAccess` methods with `Atomic<T>` types.
> 
> Tier1 test results on x86_64 linux are the same before and after this change when running with `TEST_VM_OPTS=-XX:+UseShenandoahGC`.

This pull request has now been integrated.

Changeset: 57eb9c79
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: Xiaolong Peng <xpeng at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/57eb9c79b050224c6bf402ebe7d18afff1f5ce09
Stats:     37 lines in 4 files changed: 2 ins; 2 del; 33 mod

8377043: Shenandoah: Convert ShenandoahHeapRegion related code to use Atomic<T>

Reviewed-by: xpeng, cslucas, kdnilsen, wkemper

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PR: https://git.openjdk.org/jdk/pull/29575