hg: jdk7/hotspot-gc/hotspot: 7005259: CMS: BubbleUpRef asserts referent(obj)->is_oop() failed: Enqueued a bad referent

[y.s.ramakrishna at oracle.com]

Changeset: 8df09fb45352
Author:    ysr
Date:      2010-12-09 09:22 -0800
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/8df09fb45352

7005259: CMS: BubbleUpRef asserts referent(obj)->is_oop() failed: Enqueued a bad referent
Summary: Relaxed the assert by allowing NULL referents when discovery may be concurrent.
Reviewed-by: johnc, jcoomes

! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
! src/share/vm/memory/referenceProcessor.cpp
! src/share/vm/memory/referenceProcessor.hpp