hg: jdk/submit: Shenandoah SA: Best effort heap walk

[zgu at redhat.com]

Changeset: cdac9d9a53fb
Author:    zgu
Date:      2019-03-13 13:37 -0400
URL:       http://hg.openjdk.java.net/jdk/submit/rev/cdac9d9a53fb

Shenandoah SA: Best effort heap walk

! 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