git: openjdk/jdk21u-dev: master: 8322503: Shenandoah: Clarify gc state usage

[Aleksey Shipilev]

Changeset: e3b6098b
Author:    William Kemper <wkemper at openjdk.org>
Committer: Aleksey Shipilev <shade at openjdk.org>
Date:      2024-03-14 17:09:38 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/e3b6098b4c97ca0f55ed1c160f6b7dc484cb3a12

8322503: Shenandoah: Clarify gc state usage

Reviewed-by: shade
Backport-of: 51238c4bdbce48f6b719f7dcfe5b7df8b8c6d85b

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahThreadLocalData.hpp
! src/hotspot/share/gc/shenandoah/shenandoahVMOperations.cpp
! src/hotspot/share/gc/shenandoah/shenandoahVerifier.cpp