git: openjdk/jdk: 8297936: Use reachabilityFence to manage liveness in ClassUnload tests

[Jesper Wilhelmsson]

Changeset: 5085bd5f
Author:    Afshin Zafari <Afshin.zafari at oracle.com>
Committer: Jesper Wilhelmsson <jwilhelm at openjdk.org>
Date:      2023-03-03 16:44:27 +0000
URL:       https://git.openjdk.org/jdk/commit/5085bd5f05ca70e08c6764ed208d574c556b6c57

8297936: Use reachabilityFence to manage liveness in ClassUnload tests

Reviewed-by: coleenp, dholmes

! test/hotspot/jtreg/runtime/ClassUnload/ConstantPoolDependsTest.java
! test/hotspot/jtreg/runtime/ClassUnload/KeepAliveObject.java
! test/hotspot/jtreg/runtime/ClassUnload/UnloadTest.java