hg: jdk/submit: 8220602: Shenandoah-SA: Enable best-effort implementation of heap walk

[zgu at redhat.com]

Changeset: a1acc800c87a
Author:    zgu
Date:      2019-03-14 09:53 -0400
URL:       http://hg.openjdk.java.net/jdk/submit/rev/a1acc800c87a

8220602: Shenandoah-SA: Enable best-effort implementation of heap walk
Reviewed-by: rkennke, cjplummer

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/vmStructs_shenandoah.hpp
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java
+ src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shenandoah/ShenandoahBitMap.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shenandoah/ShenandoahHeap.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shenandoah/ShenandoahHeapRegion.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/ObjectHeap.java
! test/hotspot/jtreg/serviceability/sa/ClhsdbJhisto.java
! test/hotspot/jtreg/serviceability/sa/TestHeapDumpForLargeArray.java