hg: shenandoah/jdk8/hotspot: [backport] 8221435: Shenandoah should not mark through weak roots

[rkennke at redhat.com]

Changeset: 01040e94f1e9
Author:    rkennke
Date:      2019-11-26 22:29 +0100
URL:       https://hg.openjdk.java.net/shenandoah/jdk8/hotspot/rev/01040e94f1e9

[backport] 8221435: Shenandoah should not mark through weak roots

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahRootProcessor.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahRootProcessor.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahTraversalGC.cpp