hg: shenandoah/jdk8/hotspot: Shenandoah SA: support live region iteration

[zgu at redhat.com]

Changeset: 9c888fe827f2
Author:    zgu
Date:      2019-12-10 10:58 -0500
URL:       https://hg.openjdk.java.net/shenandoah/jdk8/hotspot/rev/9c888fe827f2

Shenandoah SA: support live region iteration
Reviewed-by: rkennke

! agent/src/share/classes/sun/jvm/hotspot/gc_implementation/shenandoah/ShenandoahHeap.java
! agent/src/share/classes/sun/jvm/hotspot/oops/ObjectHeap.java
! src/share/vm/gc_implementation/shenandoah/vmStructs_shenandoah.hpp