[aarch64-port-dev ] git: openjdk/aarch64-port: master: 8256517: (ref) Reference.clear during reference processing may lose notification

[Kim Barrett]

Changeset: 66943fef
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2020-11-25 03:34:50 +0000
URL:       https://github.com/openjdk/aarch64-port/commit/66943fef

8256517: (ref) Reference.clear during reference processing may lose notification
8240696: (ref) Reference.clear may extend the lifetime of the referent

Use private native helper to implement Reference.clear.

Reviewed-by: pliden, rkennke, mchung

! make/hotspot/symbols/symbols-unix
! src/hotspot/share/gc/z/zBreakpoint.cpp
! src/hotspot/share/gc/z/zBreakpoint.hpp
! src/hotspot/share/gc/z/zDriver.cpp
! src/hotspot/share/gc/z/zReferenceProcessor.cpp
! src/hotspot/share/include/jvm.h
! src/hotspot/share/prims/jvm.cpp
! src/java.base/share/classes/java/lang/ref/FinalReference.java
! src/java.base/share/classes/java/lang/ref/Finalizer.java
! src/java.base/share/classes/java/lang/ref/Reference.java
! src/java.base/share/native/libjava/Reference.c
+ test/hotspot/jtreg/gc/TestReferenceClearDuringMarking.java
+ test/hotspot/jtreg/gc/TestReferenceClearDuringReferenceProcessing.java
! test/lib/sun/hotspot/WhiteBox.java